JP7175868B2 - Solid fuel pulverizer, boiler system, and method for detecting abrasion of pulverizing roller - Google Patents

Description

TECHNICAL FIELD The present disclosure relates to a solid fuel pulverizer, a boiler system, and a method for detecting the amount of wear of pulverizing rollers.

Conventionally, solid fuels (carbon-containing solid fuels) such as coal and biomass fuels are pulverized by a pulverizer (mill) into fine powder within a predetermined particle size range and supplied to a combustion apparatus. The mill pulverizes solid fuel such as coal and biomass fuel put into the rotary table by sandwiching it between the rotary table and rollers. The resulting fuel is sorted by a classifier to those within a predetermined particle size range, transported to a boiler, and burned in a combustion device. In a thermal power plant, steam is generated by exchanging heat with combustion gas produced by combustion in a boiler, and the steam rotates a steam turbine to rotate a generator connected to the steam turbine to generate electricity. is performed.

The rollers for pulverization wear out on the outer peripheral surface of the rollers that come into contact with the solid fuel as they are used for a long period of time. As the wear of the rollers progresses, the gap between the rotary table and the rollers widens and the pulverization performance deteriorates. Therefore, it is necessary to repair or replace the worn roller. Known methods for detecting the state of progress of roller wear include a method of manually measuring the amount of wear during internal inspection of the mill, and a method of providing a detection device for detecting wear on the rollers (see, for example, Patent Documents 1).

Patent Literature 1 discloses a mill in which an ultrasonic probe is provided in a hollow support shaft that supports crushing rollers. In the mill of Patent Document 1, an ultrasonic pulse is transmitted from the ultrasonic probe, and the thickness of the roller is measured by measuring the time for the echo from the bottom surface (reflected signal from the surface of the crushing roller) to return. (amount of wear) is measured. An output lead wire is connected to the ultrasonic probe.

Japanese Utility Model Laid-Open No. 60-148037

However, in Patent Document 1, the amount of wear measured by the ultrasonic probe is transmitted through an output lead wire. In this way, when the detection unit that detects wear-related information and the reception unit that receives the information detected by the detection unit are connected by a lead wire or the like (that is, when they are connected in a wired state), , the rotation of the roller, which is a rotating body, must be taken into consideration when laying the wire. In addition, it is necessary to provide a slip ring or the like on a lead wire or the like connecting the detecting portion and the receiving portion. Due to these circumstances, the structure in which the detection unit and the reception unit are connected in a wired state may have a complicated structure and a complicated installation work. In addition, the slip ring and the like are consumables whose connecting portion wears out with use, so they need to be replaced periodically. In addition, there is a possibility that the configuration will be complicated in order to ensure the reliability of signal transmission by means of a slip ring, etc., in an atmosphere where there is vibration or pulverized solid fuel, and there is a possibility that the running cost will increase. rice field.

The present disclosure has been made in view of such circumstances, and an object of the present disclosure is to provide a solid fuel pulverizer and a boiler system that can simplify the structure, and a method for detecting the amount of wear of pulverizing rollers.
Another object of the present invention is to provide a solid fuel pulverizer, a boiler system, and a method for detecting the amount of wear of pulverizing rollers, which can reduce running costs.

In order to solve the above problems, the solid fuel pulverizer and boiler system of the present disclosure and the method for detecting the wear amount of the pulverizing roller employ the following means.
A solid fuel crushing device according to an aspect of the present disclosure includes a housing that forms an outer shell, a rotary table on which solid fuel supplied in the housing is placed, and is rotatable about a central axis, a crushing roller that presses and crushes the solid fuel placed on the rotary table; a detection unit that is provided on the crushing roller and detects the amount of wear of the crushing roller; A transmission unit that transmits information detected by the detection unit by wireless communication, and a reception unit that receives the information transmitted from the transmission unit.

A grinding roller wear amount detection method according to an aspect of the present disclosure is arranged to be rotatable about a central axis inside a casing that forms an outer shell, and is placed on a rotary table. A method for detecting the amount of wear of a roller, comprising the steps of: detecting the amount of wear of the crushing roller with a detection unit provided on the crushing roller; a step of transmitting the received information by wireless communication; and a step of receiving the information transmitted from the transmitting unit by a receiving unit.

According to the present disclosure, the configuration can be simplified. Also, running costs can be reduced.

1 is a configuration diagram showing a solid fuel pulverizer and a boiler according to an embodiment of the present disclosure; FIG. FIG. 2 is a vertical cross-sectional view of the solid fuel crusher of FIG. 1; FIG. 3 is a side view of rollers provided in the solid fuel pulverizer of FIG. 2; 4 is a schematic longitudinal sectional view of the roller of FIG. 3; FIG. FIG. 4 is an enlarged cross-sectional view of a main portion of the roller of FIG. 3, showing a detection section provided on the roller; FIG. 6 is a cross-sectional view showing a modification of the detection unit in FIG. 5; FIG. 6 is a cross-sectional view showing a modification of the detection unit in FIG. 5; FIG. 6 is a cross-sectional view showing a modification of the detection unit in FIG. 5; FIG. 6 is a cross-sectional view showing a modification of the detection unit in FIG. 5; FIG. 6 is a cross-sectional view showing a modification of the detection unit in FIG. 5; Figure 4 is a perspective view of the roller of Figure 3; 11B is a cross-sectional view of the roller of FIG. 11A; FIG. 11B is a perspective view showing a variation of the roller of FIG. 11A; FIG. 12B is a cross-sectional view of the roller of FIG. 12A; FIG. FIG. 3 is an enlarged vertical cross-sectional view of a main part of the solid fuel crusher of FIG. 2; FIG. 14 is a longitudinal sectional view showing a modification of FIG. 13; FIG. 14 is a longitudinal sectional view showing a modification of FIG. 13; FIG. 2 is a functional block diagram showing functions of a control unit provided in the solid fuel crusher of FIG. 1; 4 is a graph showing the relationship between cumulative operating time and thickness of crushing rollers. 4 is a graph showing the relationship between cumulative operating time and roller thickness when the type of solid fuel to be pulverized is changed. 1 illustrates a system for maintenance planning in accordance with embodiments of the present disclosure; FIG.

[First embodiment]
A first embodiment of the present disclosure will be described below with reference to the drawings.
A power plant 1 according to the present embodiment includes a solid fuel crusher 100 and a boiler 200, as shown in FIG.

As an example, the solid fuel pulverization device 100 of the present embodiment pulverizes a solid fuel (carbon-containing solid fuel) such as coal or biomass fuel, generates pulverized fuel, and supplies it to the burner section (combustion device) 220 of the boiler 200. It is a device. The power plant 1 including the solid fuel crushing device 100 and the boiler 200 shown in FIG. It is good also as a system provided with the solid fuel grinding|pulverization apparatus 100 of multiple units|sets.

As shown in FIGS. 1 and 2, the solid fuel pulverization apparatus 100 of the present embodiment includes a mill (pulverization unit) 10, a coal feeder (fuel feeder) 20, and an air blower (transport gas supply unit) 30. , a state detection unit 40 , and a control unit (determination unit) 50 .
In the present embodiment, "up" indicates the vertically upper direction, and "upper" such as an upper portion or an upper surface indicates the vertically upper portion. Similarly, "lower" indicates a vertically lower portion.

The mill 10 for pulverizing solid fuel such as coal and biomass fuel supplied to the boiler 200 into pulverized fuel, which is a finely powdered solid fuel, may be of a type that pulverizes only coal or pulverizes only biomass fuel. It may be in the form of pulverizing biomass fuel together with coal.
Here, biomass fuel is a renewable organic resource derived from living organisms. chips), etc., and are not limited to those presented here. Since biomass fuel takes in carbon dioxide during the growth process of biomass, it is considered to be carbon-neutral because it does not emit carbon dioxide that becomes a global warming gas.

The mill 10 includes a housing (casing) 11 forming an outer shell, a rotary table 12 on which solid fuel supplied in the housing is placed, and the solid fuel placed on the rotary table 12 is pressed and crushed. a roller (pulverization roller) 13, a driving unit 14 that rotates the rotary table 12, a rotary classifier 16, a fuel supply unit 17, and a motor 18 that rotates the rotary classifier 16. there is
The housing 11 is a casing that is formed in a cylindrical shape extending in the vertical direction and houses the rotary table 12 , the rollers 13 , the rotary classifier 16 , and the fuel supply section 17 . The inner peripheral surface 11a of the housing 11 is substantially cylindrical, and the vertically extending central axis C1 (see FIG. 2) of the housing 11 substantially coincides with the central axes of the rotary table 12 and the rotary classifier 16, which will be described later. ing. In addition, in the present embodiment, an accommodating portion 91 is formed in the upper portion of the housing 11 to accommodate a receiving portion 90, which will be described later.
A fuel supply unit 17 is attached to the central portion of the ceiling portion 42 of the housing 11 . The fuel supply part 17 supplies the solid fuel introduced from the bunker 21 into the housing 11, is arranged in the center position of the housing 11 along the vertical direction, and extends to the inside of the housing 11 at its lower end. ing.

A driving portion 14 is installed near the bottom portion 41 of the housing 11, and a rotary table 12 that is rotated by the driving force transmitted from the driving portion 14 is rotatably arranged.
The rotary table 12 is a circular member in a plan view, and is arranged so that the lower ends of the fuel supply section 17 face each other. The upper surface of the rotary table 12 may have, for example, a sloping shape in which the central portion is low and the outer peripheral portion is bent upward. The fuel supply unit 17 supplies solid fuel (for example, coal or biomass fuel in this embodiment) from above toward the lower rotary table 12 , and the rotary table 12 pulverizes the supplied solid fuel between the rollers 13 . It is also called a grinding table.

Further, the turntable 12 is provided with a table liner 12a. The table liner 12a is installed at a portion where the roller 13 contacts and presses the upper surface of the rotary table 12, and protects the rotary table 12 from abrasion accompanying pulverization of the solid fuel. The table liner 12a is fixed to the rotary table 12 by a key or the like, rotates together with the rotary table 12 by the driving force transmitted from the drive unit 14, and cooperates with the roller 13 to pulverize the solid fuel.

When the solid fuel is fed from the fuel supply unit 17 toward the center of the turntable 12 , the solid fuel is guided toward the outer circumference of the turntable 12 by centrifugal force due to the rotation of the turntable 12 , and is placed between the rollers 13 and the solid fuel. It is pinched and pulverized. The pulverized solid fuel is blown upward by a carrier gas (hereinafter referred to as primary air) guided from a carrier gas flow path (hereinafter referred to as a primary air flow path) 100a and rotated. It is led to the type classifier 16 . The primary air flow path 100a supplies primary air into the housing 11 below the rotary table 12 via a primary air duct (carrier gas supply unit) 27 (see FIG. 2) connected to the housing 11. . A blowout port 25 is provided on the outer circumference of the rotary table 12 to allow the primary air flowing in from the primary air flow path 100 a to flow out to the space above the rotary table 12 in the housing 11 . A vane 26 is installed at the blowout port 25 to impart a swirling force to the primary air blown out from the blowout port 25 . The primary air to which the swirling force is applied by the vanes 26 becomes an air flow having a swirling velocity component, and guides the solid fuel pulverized on the rotary table 12 to the rotary classifier 16 above inside the housing 11 . A deflection plate 15 is provided on the inner peripheral surface 11a of the housing 11 above the outlet 25 so as to protrude from the inner peripheral surface 11a of the housing 11 toward the center of the mill. The primary air that blows out is bent toward the inside of the mill, and the primary air that blows out from the blowout port 25 prevents the pulverized solid fuel from being blown to the rotary classifier 16 in the shortest distance. Since the surface of the deflection plate 15 is worn by being exposed to high-velocity primary air mixed with pulverized solid fuel, the deflection plate liner 15a with high abrasion resistance is provided. Of the pulverized solid fuel mixed with the primary air, those larger than a predetermined particle size are classified by the rotary classifier 16, or are dropped onto the rotary table without reaching the rotary classifier 16. 12 and pulverized again.

The roller 13 is a rotating body that pulverizes the solid fuel supplied from the fuel supply unit 17 to the turntable 12 . The roller 13 is pressed against the upper surface of the rotary table 12 and cooperates with the rotary table 12 to pulverize the solid fuel. Further, the roller 13 is provided with an abrasion sensor 80, which will be described later. Details of the roller 13 and the wear sensor 80 will be described later.
Although only one roller 13 is shown as a representative in FIG. be. For example, three rollers 13 are arranged at equal intervals in the circumferential direction at angular intervals of 120° on the outer peripheral portion. In this case, the portions where the three rollers 13 are in contact with the upper surface of the turntable 12 (the portions to be pressed) are equidistant from the rotation center axis of the turntable 12 .

The roller 13 can be vertically swung by a journal head 45 and is supported on the upper surface of the rotary table 12 so as to move toward and away from it. When the rotary table 12 rotates while the outer peripheral surface is in contact with the upper surface of the rotary table 12 , the roller 13 receives a rotational force from the rotary table 12 and rotates together. When the solid fuel is supplied from the fuel supply unit 17, the solid fuel is pressed between the roller 13 and the rotary table 12 and pulverized into fine powder fuel.

The support arm 47 of the journal head 45 is supported by a horizontal support shaft 48 at its intermediate portion so that the roller 13 can swing vertically around the support shaft 48 on the side surface portion 11b of the housing 11 . A pressing device 49 is provided at the upper end of the support arm 47 on the vertical upper side. The pressing device 49 is fixed to the housing 11 and applies a load to the roller 13 via the support arm 47 and the like so as to press the roller 13 against the rotary table 12 .

The drive unit 14 is a device that transmits a driving force to the rotary table 12 and rotates the rotary table 12 around its central axis. The driving unit 14 generates driving force for rotating the rotary table 12 .

The rotary classifier 16 is provided in the upper part of the housing 11 and has a hollow, substantially inverted conical outer shape. The rotary classifier 16 has a plurality of vertically extending blades 16a on its outer periphery. The blades 16a are provided at predetermined intervals (equal intervals) around the central axis of the rotary classifier 16. As shown in FIG. In addition, the rotary classifier 16 classifies the solid fuel pulverized by the rollers 13 into those larger than a predetermined particle size (for example, 70 to 100 μm for coal) (hereinafter, pulverized solid fuel exceeding a predetermined particle size is referred to as “coarse powder”). It is an apparatus for classifying solid fuel into particles of a predetermined particle size or smaller (hereafter pulverized solid fuel of a particle size of a specified particle size or smaller is referred to as "pulverized fuel"). The rotary classifier 16, which classifies by rotation, is also called a rotary separator, is given rotational driving force by a motor 18 controlled by a control unit 50, and substantially coincides with the central axis C1 extending in the vertical direction of the housing 11. It rotates around the fuel supply portion 17 around a central axis (not shown).

The pulverized solid fuel that reaches the rotary classifier 16 is separated from large-diameter coarse fuel by the blade 16a due to the relative balance between the centrifugal force generated by the rotation of the blade 16a and the centripetal force caused by the primary air flow. After being knocked down, it is returned to the rotary table 12 and pulverized again, and the pulverized fuel is led to an outlet (discharge) 19 in the ceiling 42 of the housing 11 .
The pulverized fuel classified by the rotary classifier 16 is discharged from the outlet 19 to the supply channel 100b and conveyed to the post-process together with the primary air. The pulverized fuel that has flowed out to the supply channel 100 b is supplied to the burner section 220 of the boiler 200 .

The fuel supply unit 17 is attached such that its lower end extends into the interior of the housing 11 along the vertical direction so as to pass through the upper end of the housing 11 . supplied to approximately the central region of the The fuel supply unit 17 is supplied with solid fuel from the coal feeder 20 .

The coal feeder 20 includes a conveying section 22 and a motor 23 . The conveying unit 22 conveys the solid fuel discharged from the lower end of the down spout 24 directly below the bunker 21 by the driving force given by the motor 23 and guides it to the fuel supply unit 17 of the mill 10 .
Normally, the interior of the mill 10 is supplied with primary air for conveying the pulverized fuel, which is a pulverized solid fuel, and the pressure is high. The down spout portion 24, which is a pipe extending in the vertical direction directly below the bunker 21, holds fuel in a layered state inside. The sealing performance is ensured so that primary air and pulverized fuel do not flow back in.
The amount of solid fuel supplied to the mill 10 may be adjusted by the belt speed of the belt conveyor of the transfer section 22 .

On the other hand, biomass fuel chips and pellets before pulverization have a uniform particle size (pellet size is, for example, about 6 to 8 mm in diameter and about 40 mm or less in length) and is lightweight. Therefore, when the biomass fuel is stored in the down spout portion 24, the gap formed between the biomass fuels becomes larger than in the case of the coal fuel.
Therefore, since there is a gap between the biomass fuel chips and pellets in the downspout portion 24, the primary air and pulverized fuel blown from the inside of the mill 10 pass through the gap formed between the biomass fuels, and the mill The pressure inside 10 may drop. In addition, when the primary air blows through to the reservoir of the bunker 21, the transportability of the biomass fuel deteriorates, dust is generated, the bunker 21 and the downspout part 24 ignite, and when the pressure inside the mill 10 decreases, pulverized fuel Various problems may arise in the operation of the mill 10, such as a decrease in the amount of material conveyed. For this reason, a rotary valve (not shown), for example, may be provided in the middle of the fuel supply unit 17 from the coal feeder 20 to suppress the backflow caused by the blowing up of the primary air and the pulverized fuel.

The air blower 30 is a device that dries the solid fuel pulverized by the rollers 13 and blows primary air into the housing 11 through the primary air duct 27 for supplying the rotary classifier 16 .
In order to adjust the temperature of the primary air blown to the housing 11 to an appropriate temperature, the blower section 30 includes a primary air fan (PAF: Primary Air Fan) 31, a hot gas flow path 30a, and a cooling fan in this embodiment. It comprises a gas channel 30b, a hot gas damper 30c and a cold gas damper 30d.

In this embodiment, the hot gas flow path 30a heats part of the air (outside air) sent from the primary air fan 31 by passing through a heat exchanger (heater) 34 such as an air preheater. supplied as hot gas. A hot gas damper 30c (first blower) is provided downstream of the hot gas flow path 30a. The opening degree of the hot gas damper 30c is controlled by the controller 50. FIG. The flow rate of the hot gas supplied from the hot gas flow path 30a is determined by the degree of opening of the hot gas damper 30c.

The cold gas flow path 30b supplies part of the air sent from the primary air fan 31 as cold gas at room temperature. A cold gas damper (second blower) 30d is provided downstream of the cold gas flow path 30b. The opening degree of the cold gas damper 30 d is controlled by the controller 50 . The flow rate of the cold gas supplied from the cold gas flow path 30b is determined by the degree of opening of the cold gas damper 30d.

In this embodiment, the flow rate of the primary air is the sum of the flow rate of the hot gas supplied from the hot gas channel 30a and the flow rate of the cold gas supplied from the cold gas channel 30b. It is determined by the respective temperatures and mixing ratios of the hot gas supplied from the flow path 30 a and the cold gas supplied from the cold gas flow path 30 b , and is controlled by the control unit 50 .
In addition, a part of the combustion gas discharged from the boiler 200 is led to the hot gas supplied from the hot gas flow path 30a through a gas recirculation fan (not shown) to form a mixture, whereby the primary air flow path 100a You may adjust the oxygen concentration of the primary air flowing from.

In this embodiment, the state detection unit 40 of the housing 11 transmits data measured or detected to the control unit 50 . The state detection unit 40 of the present embodiment is, for example, a differential pressure measuring means, and detects a portion where the primary air flows into the mill 10 from the primary air flow path 100a and a primary air and pulverized fuel from the inside of the mill 10 to the supply flow path 100b. is measured as the differential pressure in the mill 10. For example, depending on the classification performance of the rotary classifier 16, the amount of pulverized solid fuel circulating inside the mill 10 between the vicinity of the rotary classifier 16 and the vicinity of the rotary table 12 increases and decreases, and the difference within the mill 10 Pressure rise and fall changes. That is, the pulverized fuel discharged from the outlet 19 can be adjusted and managed with respect to the solid fuel supplied to the inside of the mill 10. A large amount of pulverized fuel can be supplied to the burner section 220 provided in the boiler 200 .
Further, the state detection unit 40 of the present embodiment is, for example, temperature measurement means, and the temperature and , the temperature of the primary air up to the outlet 19 is detected inside the housing 11, and the air blower 30 is controlled so as not to exceed the upper limit temperature. Since the primary air is cooled by conveying the pulverized material while drying it in the housing 11, the temperature at the outlet 19 from the upper space of the housing 11 is about 60 to 80 degrees, for example.

The controller 50 is a device that controls each part of the solid fuel crusher 100 . The control unit 50 may control the rotational speed of the turntable 12 with respect to the operation of the mill 10 by, for example, transmitting drive instructions to the drive unit 14 . The control unit 50 adjusts the classifying performance by, for example, transmitting a drive instruction to the motor 18 of the rotary classifier 16 to control the rotational speed, thereby optimizing the differential pressure in the mill 10 within a predetermined range. can stabilize the supply of pulverized fuel. Further, the control unit 50 adjusts the amount of solid fuel supplied to the fuel supply unit 17 by the transport unit 22 transporting the solid fuel by transmitting a drive instruction to the motor 23 of the coal feeder 20, for example. can be done. Further, the control unit 50 can control the opening degrees of the hot gas damper 30c and the cold gas damper 30d by transmitting the opening instruction to the blower unit 30, thereby controlling the flow rate and temperature of the primary air. In addition, the control unit 50 controls the hydraulic pressure applied to the pressing device 49 according to, for example, the amount of solid fuel supplied and the rotation speed of the rotary classifier 16, so that the rollers 13 are pressed against the rotary table 12. It optimizes the force and enables stable pulverization of solid fuel.

The control unit 50 includes, for example, a CPU (Central Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory), a computer-readable storage medium, and the like. A series of processes for realizing various functions is stored in a storage medium or the like in the form of a program, for example, and the CPU reads out this program to a RAM or the like, and executes information processing and arithmetic processing. As a result, various functions are realized. The program may be pre-installed in a ROM or other storage medium, provided in a state stored in a computer-readable storage medium, or delivered via wired or wireless communication means. etc. may be applied. Computer-readable storage media include magnetic disks, magneto-optical disks, CD-ROMs, DVD-ROMs, semiconductor memories, and the like.

Next, the boiler 200 that burns the pulverized fuel supplied from the solid fuel pulverizer 100 to generate steam will be described.
The boiler 200 has a furnace 210 and a burner section 220 .

The burner unit 220 heats the primary air containing the pulverized fuel supplied from the supply flow path 100b and the air (outside air) sent from the forced draft fan (FDF: Feed Draft Fan) 32 with the heat exchanger 34. This is a device that burns pulverized fuel with supplied secondary air to form a flame. Combustion of the pulverized fuel takes place in the furnace 210, and high-temperature combustion gas is discharged outside the boiler 200 after passing through heat exchangers (not shown) such as an evaporator, a superheater, and an economizer.

The combustion gas discharged from the boiler 200 is subjected to a predetermined treatment by an environmental device (a denitration device, an electric dust collector, etc., not shown), and is sent out from the primary air ventilator 31 by a heat exchanger 34 such as an air preheater. Heat is exchanged between the air sent from the forced draft fan (IDF) and the air sent from the forced draft fan (IDF) 33. The air is led to a chimney (not shown) via an induced draft fan (IDF) 33 and released to the outside air. be. The air sent from the primary air ventilator 31 heated by the combustion gas in the heat exchanger 34 is supplied to the hot gas flow path 30a described above.
The feed water to each heat exchanger of the boiler 200 is heated in an economizer (not shown) and then further heated by an evaporator (not shown) and a superheater (not shown) to generate high-temperature and high-pressure steam to generate power. It is sent to a steam turbine (not shown), which is a part of the power plant, and rotates the steam turbine, and rotates a generator (not shown) connected to the steam turbine to generate power.

Next, the roller 13 and the like will be described in detail with reference to FIGS. 3 to 12. FIG.
The roller 13 is rotatably supported by the housing 11 about the central axis C2 via the journal shaft 46, the journal head 45 and the support shaft 48 (see also FIGS. 1 and 2).
As shown in FIGS. 3 and 4, the roller 13 includes a journal housing 63 rotatably supported at the tip of the journal shaft 46, a substantially annular roller portion 64 fitted on the journal housing 63, It has The journal housing 63 is provided so as to cover the tip of the journal shaft 46 and has a cylindrical outer peripheral surface.

The roller portion 64 is formed in a substantially annular shape. Further, the roller portion 64 is fitted with the journal housing 63 so that the inner peripheral surface thereof contacts the outer peripheral surface of the journal housing 63 . When the rotary table 12 rotates while the outer peripheral surface of the roller portion 64 is in contact with the upper surface of the rotary table 12, the roller 13 receives a rotational force from the rotary table 12 and rotates together. Further, when the solid fuel is placed on the upper surface of the rotary table 12, the solid fuel is crushed by being sandwiched between the upper surface of the rotary table 12 and the outer peripheral surface of the roller portion 64. . The roller portion 64 is pressed against the rotary table 12 by a pressing device 49, and by adjusting the pressing force (for example, hydraulic load), it is possible to stably pulverize the solid fuel.
A dashed line L1 in FIG. 3 indicates how the wear of the roller portion 64 progresses in the initial stage of wear (the initial stage or the like means the initial stage in the period of use). That is, in the example of the present embodiment, in the initial stage, the roller portion 64 is in a state where a portion P1 on the base end side (that is, the side opposite to the tip end side) of the roller portion 64 wears more than the other portions. It is in. Here, the proximal side indicates the outer peripheral side of the rotary table 12 in the radial direction, and the distal side indicates the rotation center axis C1 side of the rotary table 12 . A two-dot chain line L2 in FIG. 3 indicates how the wear of the roller portion 64 progresses in the final stage of wear (the final stage means the final stage in the period of use). In the final stage, the wear of the roller portion 64 spreads around P1, and the entire region facing the rotary table 12 wears substantially uniformly. Similarly, the dashed line L3 in FIG. 3 indicates how the wear of the rotary table 12 progresses in the initial stage of wear, and the two-dot chain line L4 indicates how the wear of the turntable 12 progresses in the final stage of wear. there is Although P1 is on the base end side of the roller portion 64 as an example, it is not limited to the base end side of the roller portion 64 . P1 changes on the outer peripheral surface of the roller portion 64 in the direction of the central axis C2 depending on the specifications of the mill 10, operating conditions, and the like.

The wear sensor 80 includes a detection section (first detection section) 81 that detects wear of the roller section 64, and a transmission section (first transmission section) 82 that transmits information detected by the detection section 81 to the reception section 90 by wireless communication. and a power supply device (not shown) that supplies power to the detection unit 81 and the transmission unit 82 . The wear sensor 80 applied to the solid fuel pulverizer 100 according to the present embodiment may be any known sensor as long as it is capable of detecting information on the progress of wear. For example, the wear sensor 80 may be a wear sensor that utilizes disconnection of a conductive wire, which will be described later, or an optical fiber type wear sensor that detects the amount of wear using an optical fiber. A resistance type wear sensor that detects the amount of wear may also be used. Alternatively, an ultrasonic wear sensor that detects the amount of wear using ultrasonic waves such as an ultrasonic probe may be used. Alternatively, a magnetic wear sensor or a capacitive wear sensor may be used. In the following description, as an example, an example in which the wear sensor 80 using wire breakage is applied to the solid fuel pulverizer 100 will be described.

A power supply device (not shown) is provided not in the roller 13 but in a non-rotating body such as the support arm 47 or the housing 11 . The power supply device is a device using wireless power feeding means for supplying electric power to the detecting section 81 and the transmitting section 82 by wireless power feeding means such as a magnetic resonance method or an electromagnetic induction method. In this way, by adopting a configuration in which electric power is supplied by the wireless power supply means, it is not necessary to provide a power supply in the roller 13 which is a rotating body, so there is no need to consider the arrangement of the power supply cable. Therefore, the structure can be simplified.
Note that the power supply device may be any device that can wirelessly supply power to the detection unit 81 and the transmission unit 82 , and may be arranged outside the mill 10 , for example. Alternatively, it may be provided within the wear sensor 80 .

It should be noted that the power supply device of the present disclosure is not limited to the structure to which the above-described wireless power supply means is applied, and may have another structure. For example, the power source may be a wired power supply device that supplies power to the detection unit 81 and the transmission unit 82 from a battery or the like provided in the wear sensor 80 . In this configuration, the wired power supply device, the detection unit 81 and the transmission unit 82 are connected by power cables. The power source may be a gravity power generator that generates power using the rotation of the roller 13, or a piezoelectric power generator that generates power using the pressing force of the roller 13 against the rotary table 12. may

The transmission unit 82 transmits the wear information received from the detection unit 81 to the reception unit 90 by wireless communication such as electromagnetic waves through an antenna (not shown). The transmission unit 82 is arranged in the storage unit 83 as shown in FIG.

The storage portion 83 is a recessed space that is recessed from the inner peripheral surface of the roller portion 64 . The storage portion 83 is a closed space when the roller portion 64 and the journal housing 63 are fitted together. It should be noted that the housing portion 83 may be formed anywhere within the same rotating body as long as the wear sensor 80 is not likely to be damaged due to progress of wear. For example, the storage portion 83 may be formed in the journal housing 63 . Specifically, for example, the storage portion 83 may form a recessed space that is recessed from the outer peripheral surface of the journal housing 63 , and the transmission portion 82 may be arranged in this storage portion 83 . It should be noted that the storage unit 83 is preferably formed at a position where the transmission unit 82 can be easily removed and reinstalled during maintenance of the transmission unit 82 . Moreover, the storage portion 83 may be formed by casting, or may be formed by machining or other processing methods. Further, the size may be determined in consideration of the size of the wear sensor 80 to be housed, and the size may be inspected with a gauge or the like at the time of manufacture.

As described above, the transmitter 82 is a wirelessly powered transmitter to which power is supplied from the power supply unit by the wireless power supply unit. In addition, since the roller 13 operates every several years in an environment of high temperature (for example, about 80° C.), vigorous vibration, and dust of pulverized solid fuel, the transmission unit 82 A material having excellent heat resistance, vibration resistance, and wear resistance is used.

Specifically, the transmitter 82 may be, for example, an RFID (Radio Frequency Identification). The RFID can transmit information wirelessly using an antenna and can also receive power wirelessly. Also, the transmitter 82 may use the metal journal housing 63 as an antenna. Specifically, by adhering the antenna to metal members such as the roller portion 64 and the journal housing 63 so as to be electrically conductive, the roller portion 64 and the journal housing are connected to each other as indicated by the dashed arrow A1 in FIG. 63 may be transmitted wirelessly. By configuring in this way, the distance between the antenna and the receiving section 90 is shortened, so that information can be transmitted to the receiving section 90 more reliably.
Note that the transmitter 82 is not limited to RFID. For example, remote communication devices such as IC tags, telemeters, and transponders can be used.

The detector 81 has a plurality of conductors 85 as shown in FIG. Each conducting wire 85 is arranged in a plurality of holes 84 formed in the roller portion 64 . The hole 84 may be formed by casting, or may be formed by machining or other processing methods. Also, the size and arrangement may be inspected with a gauge or the like. In one hole portion 84, only one set of conducting wires 85 (one conducting wire makes a U-turn at the deepest bottom portion of the hole portion 84 as will be described later) is provided. In FIG. 4, the conducting wire 85 is omitted for the sake of illustration, and only the position of the tip of the conducting wire 85 on the innermost bottom surface of the hole 84 is indicated by a black circle.

A plurality of holes 84 are formed at predetermined intervals along the central axis C2 direction of the roller portion 64 . Each hole portion 84 extends radially from the center axis C2 side (inner peripheral surface side) of the roller portion 64 . An end portion of each hole portion 84 on the side of the center axis C2 is connected to the storage portion 83 . The plurality of holes 84 are formed to have different lengths in the radial direction from the end on the central axis C2 side. That is, the plurality of holes 84 have different distances from the outer peripheral surface side end of the roller portion 64 (that is, the bottom surface portion of the hole portion 84 ) to the outer peripheral surface of the roller portion 64 . In the example of FIG. 4, the length of the hole 84 provided closest to the base end of the roller portion 64 is the longest, and the hole 84 located closer to the tip of the roller portion 64 has a shorter length. ing. Also, for example, the longest hole portion 84 is arranged closest to the position P1 where wear progresses most easily. Broken lines L5, L6, and L7 in FIG. 4 schematically indicate directions in which wear progresses. That is, the wear of the roller portion 64 progresses from L5 to L7 with P1 as the center.

Each conductor 85 is connected to a transmitter 82, as shown in FIG. The conducting wire 85 extends from the transmitting portion 82 toward the bottom surface of the hole 84 and is folded back in a U-turn near the bottom surface. This folded portion serves as the tip of the conductor 85 . That is, the plurality of conducting wires 85 have different distances from the end (tip) on the outer peripheral surface side to the outer peripheral surface of the roller portion 64 . A current is flowing through each conductor 85 . When the wear of the roller portion 64 progresses and the wire 85 is broken near the tip of the wire 85 near the bottom surface, the wire breakage of the wire 85 is detected, and the roller portion 64 is moved to the position of the tip of the wire 85 that has been broken. It is possible to grasp that the wear of is progressing.
Specifically, in the example of FIG. 4, when the wear progresses to the broken line L5, the conductor 85 arranged in the longest hole 84 is broken, and the conductor 85 arranged in the longest hole 84 is broken. It can be detected that wear has progressed to the position of the tip of 85 .

Note that the detection unit 81 is not limited to the configuration described above. For example, as shown in FIG. 6, multiple conductors 85 may be arranged in one hole 84 . In this configuration, the plurality of conducting wires 85 have different distances from the end (tip) on the outer peripheral surface side to the outer peripheral surface of the roller portion 64 . Therefore, as in the example shown in FIG. 4, the progress of wear can be detected by determining which conductor 85 has been disconnected.

Further, the detection section 81 may be provided with a resistor 87 at the tip of the lead wire 85, as shown in FIG. In this configuration, as the wear of the roller portion 64 progresses and the resistor 87 is worn away, the conductive cross-sectional area of the resistor 87 decreases. As the conductive cross-sectional area of the resistor 87 decreases, the resistance value of the resistor 87 increases accordingly. The progress of wear can be detected from the increase in the resistance value. With this configuration, the progress of wear can be detected continuously. As a result, since it is possible to continuously grasp the state of progress of wear, especially when there is an abnormal situation in which wear progresses rapidly, wear detection progresses discontinuously (for example, 4 and 6), it is possible to grasp an abnormal wear condition, particularly the progress speed of wear, at an early stage. However, in the case of a configuration for continuously detecting wear, if the wear resistance of the detecting portion 81 is low with respect to the material of the roller portion 64, only the detecting portion 81 will selectively wear, and the correct wear of the roller portion 64 will not occur. Since the degree of progress cannot be detected, it is desirable that the detection portion 81 have wear resistance equivalent to that of the roller portion 64 .

The solid fuel pulverizer 100 of the present embodiment includes the above-described non-continuous detection unit (a detection unit that detects the progress of wear by disconnection of the conductor 85 shown in FIGS. 4 and 6) or a continuous detection unit ( 7) may be provided, or both types of detection units may be provided. In addition, it is preferable to provide a plurality of detection portions in the circumferential direction of the roller portion 64 and use both the continuous detection portion and the non-continuous detection portion. With such a configuration, it is possible to grasp the state of the progress of wear by the continuous method, and it is possible to grasp the amount of individual wear with high accuracy by the non-continuous method. By using both continuous and non-continuous detection units, the reliability of information on the amount of wear to be detected is improved. In addition, redundancy can be obtained by using a plurality of detection units at the same time, so even if one of the detection units is damaged, the progress of wear can be detected by the remaining detection units. .

Moreover, as shown in FIG. 8, a plurality of partition walls 86 may be provided in the hole portion 84 . Each partition wall 86 separates the space on the side of the outer peripheral surface of the roller portion 64 from the space on the side of the center axis C2 in the space defined by the hole portion 84 . In this embodiment, as an example, three partition walls 86 are provided. The three partition walls 86 are arranged side by side at predetermined intervals in the radial direction of the roller portion 64 . Hereinafter, the partition walls 86 arranged on the outer peripheral surface side are referred to as a first partition wall 86a, a second partition wall 86b, and a third partition wall 86c in order. The first partition wall 86a is arranged so that the tip of the lead wire 85 arranged on the outermost side is positioned between the bottom surface of the hole 84 and the first partition wall 86a. In addition, the second partition 86b is arranged so that the distal end portion of the lead wire 85, which is arranged second on the outer peripheral side, is located between the first partition 86a and the second partition 86b. The third partition wall 86c is arranged so that the tip of the conductor wire 85, which is arranged third on the outer peripheral side, is positioned between the second partition wall 86b and the third partition wall 86c. More preferably, each partition wall 86 is made of a raw material having abrasion resistance equal to or higher than that of the roller portion 64 .

Alternatively, as shown in FIG. 9, the hole 84 may be filled with a sealing material 88 to enclose the conductor 85 in the hole 84 . As the encapsulating material 88, for example, resin, metal, ceramic, or the like may be used. By configuring in this way, it is possible to suppress vibration of the conducting wire 85 and prevent unintended disconnection. In addition, as shown in FIG. 10, the transmitting section 82, the lead wire 85 and the partition wall 86 may be sealed with a sealing material 88. FIG. With this configuration, it is possible to suppress the vibration of not only the conductor 85 but also the partition 86 and the conductor 85, thereby preventing unintended disconnection. Alternatively, as shown in FIG. 10, the conductive wire 85 and the like may be sealed in advance with a sealing material 88, packaged, and inserted into the hole 84 as a cartridge.

Next, the position where the detector 81 is provided will be described with reference to FIGS. 11A to 12B.
As shown in FIG. 11B, there are two positions: an intermediate position P2 in the width of the roller portion 64 in the direction along the central axis C2 of the roller portion 64, and a position P1 in the direction along the central axis C2 where wear is most likely to occur. good too. In this case, as shown in FIG. 11A, the two detectors 81 are arranged side by side in the direction along the central axis C2. Also, two sets of detection units 81 may be provided at predetermined intervals in the circumferential direction.
Further, as shown in FIG. 12A, a plurality of detectors 81 may be arranged so as to be spaced apart in the direction along the central axis C2 and also spaced apart in the circumferential direction. Thereby, the plurality of detection units 81 can be appropriately provided without mutual interference. In this case also, as shown in FIG. 12B, there are two positions, the intermediate position P2 of the roller portion 64 in the direction along the central axis C2 of the roller portion 64 and the position P1 where wear is most likely in the direction along the central axis C2. is preferably provided with a detection unit 81 .
In FIGS. 11B and 12B, the conducting wire 85 located on the outermost side is arranged at the intermediate position P2 of the width of the roller portion 64 in the direction along the central axis C2, but the conducting wire 85 located on the outermost side is more preferably provided at the position P1 where it is most likely to be worn. By arranging in this way, wear of the roller portion 64 can be accurately grasped at an early stage when wear occurs.

Note that the position P1 where wear is most likely to occur may differ due to structural differences such as the positional relationship between the roller portion 64 and the rotary table 12 and the surface shape of the roller portion 64, for example. For this reason, it is preferable to appropriately set the position where it is assumed that each solid fuel pulverizer is most likely to be worn based on the results of simulations performed in advance and the results of past actual operation results. Further, when the position P1 where wear is most likely to occur is unknown, the lead wire 85 located on the outermost side of the roller portion 64 in the direction along the central axis C2 is placed at an intermediate position P2 of the roller portion 64 and from the intermediate position P2 to the rotary table 12. It is preferable to provide the detectors 81 at the same distance from the outer peripheral surface of the roller portion 64 at two positions shifted by a predetermined dimension on the outer peripheral side of the roller portion 64 .

Next, the receiver 90 will be described with reference to FIGS. 13 to 15. FIG.
The receiving unit 90 receives information wirelessly transmitted from the transmitting unit 82 (that is, receives wireless communication) and transmits the received information to the control unit 50 . As shown in FIG. 13, the receiving section 90 is provided in a housing section 91 formed in the housing 11 (see also FIG. 2). Specifically, in this embodiment, for example, the accommodating portion 91 is provided so as to protrude from the side surface of the upper portion of the housing 11 to the outer peripheral side. The accommodating portion 91 forms an accommodating space for accommodating the receiving portion 90 therein. The receiver 90 is arranged in the housing space. The housing space communicates with the internal space formed inside the housing 11 , but the atmosphere gas containing the pulverized solid fuel powder in the internal space inside the housing 11 is prevented from directly entering the housing portion 91 . I have to. That is, the receiving section 90 is arranged separately from the transmitting section 82 .

Specifically, a seal gas supply pipe (seal gas supply unit) 92 communicates with the accommodation unit 91 . The seal gas supply pipe 92 supplies seal gas supplied from a seal gas supply device (not shown) to the housing space. Since the accommodation space is filled with the seal gas supplied from the seal gas supply pipe 92 , the ambient gas in the internal space inside the housing 11 is prevented from entering the accommodation portion 91 directly.

Instead of the sealing gas supply pipe 92, as shown in FIG. 14, a partition window 93 separating the accommodation space and the internal space of the housing 11 may be provided. The partition window 93 is a plate-shaped member made of a material that transmits electromagnetic waves (wireless communication), such as glass or ceramics.

Further, as shown in FIG. 15, the receiving section 90 may be divided into a receiving antenna section 94 and an information transmitting/receiving section 95 . In this case, the information transmitter/receiver 95 is installed outside the housing 11 . Further, the receiving antenna section 94 is arranged in the accommodating section 91 in the same manner as the receiving section 90 described above. With this configuration, the information transmitting/receiving unit 95 is not directly affected by the atmospheric gas in which pulverized solid fuel powder exists in the internal space inside the housing 11, so reliability can be improved. Alternatively, the housing 11 itself, which is a metal member, may be used as the receiving antenna section.

The control unit 50 estimates the remaining life of the roller unit 64 . That is, the control unit 50 functions as a system for estimating the remaining life of the roller unit 64 that pulverizes the solid fuel between the rotary table 12 and the rotary table 12 . Note that the function of the remaining life estimation system may be provided in a control device separate from the control unit 50 .

FIG. 16 is a functional block diagram showing functions related to remaining life estimation provided in the control unit 50. As shown in FIG. As shown in FIG. 16 , the control unit 50 includes an acquisition unit 52 , an estimation unit 53 , a prediction unit 54 and a planning unit 55 .

The acquisition unit 52 acquires information transmitted from the reception unit 90 . Specifically, the detection unit 81 detects and acquires the wear information of the roller unit 64 (such as the amount of wear for each measurement position) transmitted from the transmission unit 82 . Thereby, the control section 50 can monitor the wear condition of the roller section 64 .

The estimation unit 53 estimates the remaining life of the roller unit 64 based on the wear information acquired by the acquisition unit 52 . The remaining life may be estimated by the control unit 50, or an operator or an observer may separately prepare a graph of the progress of wear and estimate the time until the life. Also, the control unit 50 may display the estimated remaining life on a display unit such as a display.

The prediction unit 54 estimates in the estimation unit 53 based on the database in which the operating state of the solid fuel pulverization device 100 and the remaining life transition characteristic corresponding to the operating state are accumulated in advance, and the database accumulated in the current operation. Predict the future transition of remaining life from the transition of remaining life. The estimated remaining life characteristic is information indicating the characteristic of remaining life that changes depending on the operating state, and specifically, it is a curve characteristic (a straight line may be used) as shown in A, B, and C of FIG. 17 . That is, the database stores past and present operation information of the solid fuel pulverizer 100 . The database may store past operation data of the solid fuel pulverizer 100 whose lifetime is to be estimated, or may store past operation data of other solid fuel pulverizers 100 having similar configurations. Also, not only actual operation data but also virtually simulated data may be stored in the database. The database may be provided in the control unit 50 (storage unit), or may be provided in another device. The operating state includes the type of solid fuel (coal type information, fuel type information, etc.), the amount of solid fuel supplied (coal supply amount), the hydraulic load on the roller 13 (pressing force of the roller portion 64 against the rotary table 12), the solid fuel At least one of the accumulated operating time of the fuel pulverizer 100 and the operating load of the solid fuel pulverizer 100 is included. It should be noted that the operating state is not limited to the above, and may include any parameter that affects the life of the roller portion 64 .

Specifically, the prediction unit 54 refers to the database, selects data of an operating state similar to the operating state of the solid fuel pulverizer 100 whose remaining life is to be estimated, and selects the data of the similar operating state. Select and acquire the corresponding remaining life transition characteristics. The data of a similar operating state is data of an operating state that is estimated to have a similar residual life impact to the operating state of the solid fuel pulverizer 100 whose remaining life is to be estimated. For example, when selecting using the type of solid fuel as the operating state, for the solid fuel of the solid fuel crushing device 100 that is the target of remaining life estimation, wear information for operating time from the viewpoint of remaining life impact Operating conditions including solid fuel, which are assumed to have similar effects on changes (such as the amount of wear for each measurement position), are similar operating conditions. It should be noted that the similarity determination priority may be set for each parameter of the operating state, and the similarity determination may be performed for a parameter with a high priority (for example, the type of solid fuel).

FIG. 17 shows an example of selection of remaining life transition characteristics of similar operating conditions for the roller portion 64 of the solid fuel pulverizer 100 that is the target of remaining life estimation. FIG. 17 shows an example in which characteristic A, characteristic B, and characteristic C are selected as remaining life transition characteristics. Then, in FIG. 17, the estimation results of the remaining life from the measurement information of the roller wall thickness performed for the solid fuel pulverizer 100 which is the remaining life estimation target are E1 (first estimation result), E2 (2 estimation result) and En (nth estimation result).

The prediction unit 54 estimates the remaining life of the roller unit 64 of the solid fuel pulverizer 100, which is the target of remaining life estimation, from the selected remaining life transition characteristics (A, B, C). Remaining life transition characteristics (A, B, C) having roller wall thickness transition characteristics similar to transition characteristic E are specified. In the example of FIG. 17, the transition characteristic from E1 to En based on the measurement information of the roller thickness is similar to the characteristic C, so the characteristic C is specified. For example, similarity may be determined based on whether or not transition characteristics of roller thickness (or wear amount) with respect to accumulated time match within a predetermined range. Whether or not they match within a predetermined range may be, for example, a match within ±10%, excluding measurement information (roller thickness or wear amount) that is clearly determined to be unusual, and more preferably. Matches may be within ±5%.
When the characteristic C is identified, it is estimated that the remaining life characteristic of the solid fuel pulverizer 100, which is the remaining life estimation target, will change in the future as shown in the characteristic C, and the life reaching time Tb will be reached. In this way, based on the past database excluding the data currently being measured, it is possible to predict the future transition of remaining life in consideration of the operating state of the solid fuel crusher 100, so the remaining life can be estimated more accurately. It is possible to estimate The transition characteristic E of the estimation result of the remaining life of the roller unit 64 of the solid fuel pulverizer 100, which is the remaining life estimation target, may be the transition characteristic from the time of completion to the present, or from the present to the past. It may be a transition characteristic in a predetermined period, or it may be a transition characteristic from the point in time when the operating state changes significantly (for example, the type of solid fuel changes) to the present.

In addition, as in the example of FIG. 17, the transition characteristic of the estimation result of the remaining life of the roller unit 64 performed for the solid fuel crusher 100 that is the remaining life estimation target and the selected remaining life transition characteristic Even if there is no perfect correspondence, a similar transition characteristic may be selected from among the selected remaining life transition characteristics. In addition, among the selected remaining life transition characteristics, a transition characteristic similar to the transition characteristic of the estimation result of the remaining life performed for the roller unit 64 of the solid fuel pulverizer 100 that is the target of remaining life estimation is in the past database. If not, it may be predicted based on the selected remaining life transition characteristics. For example, in FIG. 17, the transition characteristic of the estimation result of the remaining life for the roller part 64 of the solid fuel pulverizer 100 that is the remaining life estimation target is between the characteristic A and the characteristic B. The difference from the characteristic A side and the characteristic B side, based on the characteristic A and the characteristic B, the future remaining life of the roller portion 64 of the solid fuel crushing device 100 that is the target of remaining life estimation It is also possible to predict the transition. In this case, for example, an intermediate line between the characteristic A and the characteristic B is generated by the proportional ratio of the difference between the characteristic A side and the characteristic B side, and the remaining life transition prediction is performed.

In addition, the processing by the prediction unit 54 (selection of a similar operating state in the database and estimation of the remaining life of the roller unit 64 of the solid fuel pulverization device 100 that is the target of remaining life estimation in the selected remaining life transition characteristic Selection of remaining life transition characteristics with transition characteristics similar to the transition characteristics of the estimation result, prediction of future remaining life transition based on the selected remaining life transition characteristics) may be processed by a preset algorithm. , may be appropriately processed using AI.

Further, as shown in FIG. 18, for example, when the solid fuels A, B, and C, which are solid fuel types (charcoal types) having different degrees of influence on the wear of the roller portion 64, are switched for operation, each It is possible to estimate the amount of wear from the measurement information of the roller thickness each time the type of coal is switched, and to evaluate the remaining life with respect to the accumulated operating time. For this reason, the replacement cycle of the roller portion 64 can be extended beyond the remaining life estimated from the measurement results of the conventional internal inspection.
That is, conventionally, based on the result of wear measurement (amount of wear) during internal inspection, the remaining life (wear limit) was predicted when wear progressed to approximately the same extent as before (see the dashed line in the graph). On the other hand, in the present embodiment, the wear amount of the roller wall thickness can be measured sequentially based on the accumulated operating time, and the wear amount can be estimated each time the coal type is switched, so the remaining life can be accurately predicted. (See the dashed line in the graph of FIG. 18). Therefore, as shown in FIG. 18, it has become possible to use up the thickness of the roller portion 64 by X on the vertical axis of the graph, as compared with the conventional art. Further, the operation time up to the replacement cycle of the roller portion 64 can be extended by Y on the horizontal axis of the graph.

The planning unit 55 creates a maintenance plan based on the estimated remaining life transition characteristics. Specifically, since the life expectancy estimated by the estimation unit 53 and the life expectancy estimated by the prediction unit 54 can be known at what time in the future the service life will be reached, the planning unit 55 creates a maintenance plan. In addition, since the remaining life transition characteristic can be estimated more accurately as described above, it is possible to make a plan with a margin for the life.

For example, the planning unit 55 creates a maintenance plan a predetermined period before the estimated end of life. The predetermined period is set based on the period necessary for performing maintenance safely and stably, such as the time required for replacement of the roller unit 64 to be maintained, for example. The maintenance plan includes, for example, at least one of maintenance timing, an operation plan for adjusting the maintenance timing, and load sharing adjustment in the plurality of solid fuel pulverizers 100 .

The maintenance timing is the timing (recommended timing) at which the roller portion 64 should be replaced, which is set based on the estimated remaining life transition characteristics. The maintenance timing is set, for example, by adding a predetermined margin to the estimated end-of-life timing.

The operation plan for adjusting the maintenance time is an operation plan for the solid fuel pulverizer 100, and is for adjusting the time until the maintenance time. For example, if the maintenance time has already been set and is later than the estimated end of service life, an operation plan for extending the service life is planned. Specifically, the type of solid fuel is changed, the degree of fineness is relaxed, and the like. By optimizing the operating conditions, it is possible to extend the service life more safely and perform maintenance at the appropriate time. It should be noted that if the preset maintenance timing is before the estimated service life reaching time, an operation plan that increases the load (amount of solid fuel to be pulverized) of the solid fuel pulverizer 100 can be planned. good.

The adjustment of load sharing among the plurality of solid fuel pulverizers 100 means appropriately adjusting the load sharing among the plurality of solid fuel pulverizers 100 provided in the power plant 1 . For example, to match the maintenance timing of the solid fuel crushing devices 100 in a plurality of units, or to set the timing in stages (maintenance intervals are made equal to the plurality of solid fuel crushing devices 100), etc. Each solid fuel crushing device Plan 100 load share adjustments. For example, if the life end time expected for one solid fuel pulverizer 100 out of a plurality of solid fuel pulverizers 100 is earlier than the other solid fuel pulverizers 100, the solid fuel pulverizer By loosening the load on the solid fuel crusher 100 and letting the other solid fuel crusher 100 bear the load, it is possible to adjust the life end timings of the plurality of solid fuel crushers 100 to match.

FIG. 19 is an example of a system related to maintenance planning. As shown in FIG. 19, on the user side, the remaining life estimation information of the solid fuel crusher 100 is aggregated in the information aggregation system 101, and the server 102 on the device manufacturer side acquires the information aggregated in the aggregation system, The planning system 103 makes a plan and makes a proposal to the user. Although FIG. 19 exemplifies the case where the planning unit 55 is provided as the planning system 103 on the device manufacturer side, it may be provided on the user's solid fuel crushing device side.

According to this embodiment, the following effects are obtained.
In this embodiment, the transmission section 82 transmits the wear amount of the crushing roller detected by the detection section 81 to the reception section 90 . As a result, the wear amount of the roller portion 64 can be detected and monitored without stopping the solid fuel pulverizing device 100 .
Further, the transmission unit 82 transmits the wear amount to the reception unit 90 by wireless communication. That is, the transmitter 82 and the receiver 90 are not connected by a lead wire or the like. Therefore, the structure can be simplified. In addition, since it is not necessary to consider the routing of the conducting wire 85, the installation work can be simplified.
In addition, since no consumables are provided, the running cost can be reduced compared to the configuration provided with consumables such as slip rings used when the transmitting section 82 and the receiving section 90 are connected by lead wires or the like. can.

In addition, in the present embodiment, the plurality of detection portions 81 are spaced apart in the direction along the rotation center axis C2 of the roller portion 64 and spaced apart in the circumferential direction of the roller portion 64 . As a result, the wear amount of the roller portion 64 can be detected over a wide range in the direction along the center axis C2. Moreover, the wear amount of the roller portion 64 can be detected over a wide range in the circumferential direction.
Further, when a plurality of holes 84 are formed in order to provide a plurality of detection portions 81 in the roller portion 64 as in the present embodiment, the strength of the portion where the plurality of detection portions 81 are concentrated is reduced. However, in the present embodiment, by dispersing the locations where the strength may be reduced in the direction along the central axis C2 of the roller portion 64 and the circumferential direction, the strength reduction can be suppressed. For example, if the detection portions 81 (the portion where the strength is reduced) are aligned in the direction of the center axis C2, there is a possibility that the roller portion 64 will be damaged or the like with that portion as the base point. In the present embodiment, since the detectors 81 are dispersed, it is possible to suppress a decrease in the strength of the roller portion 64 .

In addition, in the present embodiment, at least one of the plurality of detection portions 81 is provided at a position where it is most likely to be worn or is assumed to be most likely to be worn in the direction along the central axis C2. As a result, the degree of progress of wear of the roller portion 64 in the initial stage of wear of the roller portion 64 can be accurately grasped.

Further, in the present embodiment, the detection section 81 has a plurality of conducting wires 85 with different distances from the tip to the outer peripheral surface of the roller section 64 . As the wear of the outer peripheral surface of the roller portion 64 progresses, first, among the plurality of conductive wires 85, the wire 85 having the shortest distance to the outer peripheral surface (hereinafter referred to as the "first conductive wire") breaks as the roller wears. From this, it can be determined that the wear of the roller portion 64 has progressed to the first conducting wire. Further, if the wear progresses further, among the plurality of conductors 85, the conductor 85 having the second shortest distance to the outer peripheral surface (hereinafter referred to as "second conductor") breaks as the roller wears. Accordingly, it can be determined that the wear of the roller portion 64 has progressed to the second conducting wire. Thus, in this embodiment, the degree of progress of wear of the roller portion 64 can be detected in detail.

In this embodiment, the hole portion 84 is provided with a partition wall 86 that separates the space on the side of the outer peripheral surface from the space on the side of the central axis C2. When the wear of the outer peripheral surface of the roller portion 64 progresses and the wear reaches the bottom portion of the hole portion 84 (end portion on the outer peripheral surface side), the bottom portion disappears. Since the bottom portion disappears, the space on the outer peripheral surface side of the roller portion 64 (that is, the internal space of the housing 11) communicates with the space defined by the hole portion 84 (hereinafter referred to as “hole space”). do. As a result, the solid fuel in the internal space flows into the hole space, but further inflow of the solid fuel that has flowed is blocked by the partition wall 86 . Therefore, the inflow of the solid fuel into the hole portion 84 can be suppressed. Therefore, it is possible to prevent the detector 81 arranged in the hole 84 from being damaged by the solid fuel entering the hole 84 .

In this embodiment, the pulverized solid fuel is discharged from the outlet 19 provided at the top of the housing 11 by the carrier gas supplied from the lower side of the rotary table 12 . That is, in the housing 11, the carrier gas flows from the bottom to the top. As a result, the high-temperature carrier gas exchanges heat with the pulverized solid fuel, and the temperature decreases from the bottom to the top. In this embodiment, the receiver 90 is provided on the upper portion of the housing 11 above the rotary table 12 . As a result, the receiving unit 90 conducts heat to the receiving unit 90 while the temperature of the carrier gas is lowered. As a result, the temperature of the receiver 90 is less likely to rise, so damage to the receiver 90 due to high temperatures can be suppressed.

In this embodiment, the sealing gas supply pipe 92 supplies the sealing gas to the accommodation space that accommodates the receiver 90 . Although the housing space and the internal space of the housing 11 are communicated with each other, the atmosphere gas containing the pulverized solid fuel powder in the internal space inside the housing 11 is prevented from directly entering the housing portion 91 . That is, part of the seal gas filled in the accommodation space moves into the internal space. As a result, the atmosphere gas in which the solid fuel powder is present, which flows from the internal space toward the housing space, is pushed back into the internal space by the seal gas. Therefore, it is possible to make it difficult for the pulverized solid fuel powder to flow into the accommodation space. Therefore, the reception unit 90 can be made difficult to be damaged by the solid fuel scattering in the internal space. Moreover, since the temperature of the accommodation space can be lowered by the seal gas filled in the accommodation space, it is possible to further suppress damage to the receiver 90 due to high temperatures.
In addition, in this embodiment, since the accommodation space communicates with the internal space, the communication wirelessly transmitted from the transmitter 82 reaches the receiver 90 without interruption. Therefore, damage to the receiving section 90 can be suppressed without affecting transmission and reception between the transmitting section 82 and the receiving section 90 .
Also, by providing the partition wall window 93, it is possible to suppress the inflow of the solid fuel powder into the accommodation space. In addition, since the partition wall window 93 allows wireless communication to pass through, it is possible to suppress damage to the receiving unit 90 without affecting communication wirelessly transmitted and received between the transmitting unit 82 and the receiving unit 90. .

Further, in this embodiment, the remaining life of the roller portion 64 is estimated based on the amount of wear of the roller portion 64 . For this reason, it is possible to improve the accuracy of estimating the remaining life of the solid fuel pulverizer 100 including the roller portion 64 in response to fluctuations in the operating state. By estimating the remaining life more accurately, the maintenance (repair, replacement, etc.) of the roller portion 64 can be performed at a more appropriate timing without giving an extra margin to the remaining life. That is, since the frequency of maintenance can be reduced, the solid fuel crusher 100 can be operated for a longer period of time. Therefore, maintenance costs can be reduced. Moreover, the operation rate of the solid fuel crusher 100 and the power plant 1 can be improved.

Further, in the present embodiment, based on a database in which operating states and life expectancy transition characteristics are associated, it is possible to predict future life expectancy transitions from the life expectancy transitions estimated by the estimating unit 53 . The transition of the remaining life in the future can be predicted more accurately, and maintenance (replacement, etc.) of the roller portion 64 can be performed at a more appropriate timing. That is, since the roller portion 64 can be used for a longer time, maintenance frequency can be reduced. Therefore, maintenance costs can be reduced. Moreover, the operation rate of the solid fuel crusher 100 and the power plant 1 can be improved.

In this embodiment, at least one of the type of solid fuel, the cumulative operating time, and the operating load is used as the operating state of the solid fuel pulverizer 100 . Information about solid fuel type, cumulative operating hours, and operating load are factors that affect remaining life. Therefore, it is possible to effectively predict the transition of the remaining life in the future.

In this embodiment, by creating a maintenance plan based on the estimated remaining life, it is possible to make a plan with ample time for maintenance. Therefore, the operating rates of the solid fuel pulverizer 100 and the power plant 1 can be improved. In the maintenance plan, for example, maintenance timing, an operation plan for adjusting the maintenance timing (for example, changing the type of solid fuel, etc.), load sharing adjustment in a plurality of solid fuel crushers, etc. can be performed.

It should be noted that the present disclosure is not limited to the above-described embodiments, and modifications can be made as appropriate without departing from the scope of the present disclosure.
For example, a wear sensor may be provided in addition to the roller portion 64 . For example, in addition to the roller portion 64, the table liner 12a installed on the rotary table 12 may be provided with a wear sensor (second detection portion) (not shown). In this case, the wear information of the table liner 12a can be received by the receiving section and the information can be obtained by the transmitting section (second transmitting section) and the receiving section (not shown). Further, a non-illustrated wear sensor (third detector) may be provided on the flow deflection plate liner 15a attached to the flow deflection plate 15 installed on the inner peripheral surface 11a of the housing 11. FIG. In this case, the wear information of the table liner 12a can be received by the receiving section and the information can be obtained by the transmitting section (third transmitting section) and the receiving section (not shown). Further, wear sensors can be provided on wear members existing in the solid fuel pulverizer 100 in addition to the locations described above. The receiving section for receiving the wear information of each wear member (the table liner 12 a and the deflection plate liner 15 a ) may be shared with the receiving section 90 for receiving the wear information of the roller section 64 . By configuring in this way, it is possible to monitor the wear condition of the wear members present in the solid fuel pulverizer 100 with a minimum of equipment.
In addition, when wear sensors are provided on wear members such as the table liner 12a and the deflection plate liner 15a, the wear sensors are installed in the same rotating body, such as the bottom surface of the table liner 12a or the top surface of the turntable 12. It can be installed anywhere as long as there is no risk of breakage of the wear sensor due to progress of wear. In the deflection plate liner 15a, since the deflection plate 15 is a non-rotating portion, it is desirable to provide a wear sensor in the immediate vicinity of the wear member. It is desirable to provide a wear sensor on the body side of the plate 15 .

The solid fuel pulverizer, boiler system, and method for detecting the amount of wear of the pulverizing rollers described in each of the embodiments described above can be grasped, for example, as follows.
A solid fuel crushing device (100) according to an aspect of the present disclosure includes a casing (11) forming an outer shell, and a rotary table (12) on which solid fuel supplied in the casing (11) is placed. , crushing rollers (13, 64) that are rotatable about the central axis (C2) and press and crush the solid fuel placed on the rotary table (12); and the crushing roller (13 , 64) for detecting the amount of wear of the crushing rollers (13, 64); A first transmitter (82) that transmits information detected by (81) by wireless communication, and a receiver (90) that receives the information transmitted from the first transmitter (82).

In the above configuration, the first transmission section transmits the wear amount of the crushing roller detected by the first detection section to the reception section. This makes it possible to detect and monitor the amount of wear of the crushing roller without stopping the solid fuel crusher.
Also, the first transmission unit transmits the wear amount to the reception unit by wireless communication. That is, the first transmission section and the reception section are not connected by a lead wire or the like. Therefore, the structure can be simplified. In addition, since it is not necessary to consider the routing of conducting wires, etc., the installation work can be simplified.
In addition, since the first transmission unit is not provided with consumables, the running cost is lower than that of a configuration in which consumables such as slip rings are provided when connecting the first transmission unit and the reception unit with a lead wire or the like. can be reduced.

Further, in the solid fuel crusher (100) according to one aspect of the present disclosure, a plurality of the first detection units (81) are provided, and the plurality of the first detection units (81) are arranged along the central axis (C2). and spaced apart in the circumferential direction of the crushing rollers (13, 64).

In the above configuration, the plurality of first detection units are spaced apart in the direction along the central axis and spaced apart in the circumferential direction of the crushing roller. As a result, the wear amount of the crushing roller can be detected over a wide range in the direction along the central axis. Also, the wear amount of the crushing roller can be detected over a wide range in the circumferential direction.
In addition, by providing a plurality of first detection units concentratedly on the pulverizing roller, there is a possibility that the strength of the portion where the plurality of first detection units are concentratedly provided may decrease. For example, if the first detection portions (the portion where the strength is reduced) are arranged in the central axis direction, the crushing roller may be damaged or the like with that portion as a base point. In such a case, since the first detection units are dispersed in the above configuration, locations where the strength may be reduced can be dispersed in the direction along the central axis of the crushing roller and in the circumferential direction. Therefore, it is possible to suppress a decrease in the strength of the crushing roller.

Further, in the solid fuel crusher (100) according to one aspect of the present disclosure, at least one of the plurality of first detection units (81) is worn most in the direction along the central axis (C2). It is provided at a position where it is likely to wear easily or where it is assumed that it will wear most easily.

In the above configuration, at least one of the plurality of first detectors is provided at the position where it is most likely to be worn or is assumed to be most likely to be worn in the direction along the central axis. As a result, it is possible to accurately grasp the degree of progress of wear of the crushing roller in the initial stage of wear of the crushing roller.

Further, in the solid fuel crushing device (100) according to one aspect of the present disclosure, the first detection unit (81) is positioned closer to the central axis (C2) than the outer peripheral surface of the crushing rollers (13, 64). each of the plurality of conducting wires (85) is arranged such that the distance from the end on the outer peripheral surface side to the outer peripheral surface of the crushing roller (13, 64) is different. It is

In the above configuration, the first detection section has a plurality of conducting wires with different distances to the outer peripheral surface of the crushing roller. As the wear of the outer peripheral surface of the crushing roller progresses, first, among the plurality of conductive wires, the wire having the shortest distance from the outer peripheral surface (hereinafter referred to as the "first conductive wire") breaks as the roller wears. From this, it can be determined that the abrasion of the crushing roller has progressed to the first conducting wire. Further, if the wear progresses further, among the plurality of conducting wires, the conducting wire having the second shortest distance to the outer peripheral surface (hereinafter referred to as "second conducting wire") breaks as the roller wears. From this, it can be determined that the abrasion of the crushing roller has progressed to the second conductor. Thus, with the above configuration, the progress of wear of the crushing roller can be detected in detail.

Further, in the solid fuel crushing device (100) according to one aspect of the present disclosure, the crushing rollers (13, 64) have a A hole portion (84) extending toward is formed, the first detection portion (81) is arranged in the hole portion (84), and the hole portion (84) has the hole portion (84). A partition wall (86) is provided to separate the space defined by (84) into the space on the side of the outer peripheral surface and the space on the side of the central axis (C2).

In the above configuration, the partition is provided in the hole to separate the space on the outer peripheral surface side from the space on the central axis side. When the wear of the outer peripheral surface of the crushing roller progresses and the wear reaches the bottom surface of the hole (the end on the outer peripheral surface side), the bottom surface disappears. Since the bottom surface disappears, the space on the outer peripheral surface side of the crushing roller (that is, the internal space of the housing) communicates with the space defined by the hole (hereinafter referred to as "hole space"). As a result, the solid fuel in the internal space flows into the recessed space, but further inflow of the solid fuel is blocked by the partition walls. Therefore, it is possible to suppress the fixed fuel from flowing into the hole. Therefore, it is possible to prevent the first detection section arranged in the hole from being damaged by the solid fuel that has entered the recess.

Further, a solid fuel crushing device (100) according to an aspect of the present disclosure is provided on the upper part of the casing (11), and crushes the solid fuel crushed by the crushing rollers (13, 64) into the casing (11). ) and a discharge portion (19) disposed vertically below the rotary table (12) for discharging the solid fuel pulverized by the crushing rollers (13, 64) to the discharge portion (19). a carrier gas supply unit (27) for supplying a carrier gas to be carried into the housing (11); 12) is provided on the vertically upper side.

In the above configuration, the pulverized solid fuel is discharged from the outlet provided at the top of the housing by the carrier gas supplied from the lower side of the rotary table. That is, the carrier gas flows from the bottom to the top in the housing. This ensures that when the carrier gas is hot (at least warmer than the pulverized solid fuel), the carrier gas moves from below to above by exchanging heat with the pulverized solid fuel, and therefore the temperature rises. decreases. In the above configuration, the receiver is provided above the rotary table in the housing. As a result, the carrier gas conducts heat to the receiver while the temperature of the carrier gas is lowered. As a result, since the temperature of the receiver is less likely to rise, damage to the receiver due to high temperature can be suppressed.

Further, the solid fuel pulverization device (100) according to one aspect of the present disclosure includes a storage section (91) forming a storage space that stores the reception section (90), and a seal gas that supplies seal gas to the storage space. and a supply part (92), wherein the housing space communicates with an internal space formed inside the housing (11).

In the above configuration, the seal gas supply section supplies seal gas to the housing space that houses the receiver section. Since the accommodation space and the internal space are in communication, part of the seal gas filled in the accommodation space moves into the internal space. As a result, the pulverized solid fuel powder heading from the internal space in the housing to the housing space is pushed back into the internal space by the seal gas. Therefore, it is possible to make it difficult for the pulverized solid fuel powder to flow into the accommodation space. Therefore, it is possible to make the receiving part less likely to be damaged by the solid fuel powder. Moreover, since the temperature of the accommodation space can be lowered by the seal gas filled in the accommodation space, it is possible to suppress damage to the receiving section due to high temperatures.
Further, in the above configuration, since the housing space communicates with the internal space, radio waves transmitted from the first transmitter reach the receiver without being blocked. Therefore, damage to the receiving section can be suppressed without affecting transmission and reception between the first transmitting section and the receiving section.

Further, the solid fuel pulverization device (100) according to one aspect of the present disclosure is based on the amount of wear detected by the first detection unit (81). A part (53) is provided.

In the above configuration, the remaining life of the crushing roller is estimated based on the amount of wear of the crushing roller. For this reason, it is possible to improve the accuracy of estimating the remaining life of the solid fuel pulverizer provided with the pulverizing rollers in response to fluctuations in the operating state. By estimating the remaining life more accurately, maintenance (replacement, etc.) of the crushing roller can be performed at a more appropriate timing. That is, since the crushing roller can be used for a longer period of time, maintenance frequency can be reduced. Therefore, maintenance costs can be reduced. In addition, it is possible to improve the operating rate of the solid fuel pulverizer.

Further, in the solid fuel crusher (100) according to one aspect of the present disclosure, the estimating unit (53) based on a database in which the operating state and the remaining life transition characteristic corresponding to the operating state are accumulated in advance A prediction unit (54) is provided for predicting the transition of the remaining life in the future from the estimated transition of the remaining life.

In the above configuration, based on the database in which the operating state and the remaining life transition characteristics are associated, it is possible to predict the future transition of the remaining life from the transition of the remaining life estimated by the estimating unit. It is possible to more accurately predict the transition of the remaining life in the future, and it is possible to carry out maintenance (replacement, etc.) of the crushing rollers at a more appropriate timing. That is, since the crushing roller can be used for a longer period of time, maintenance frequency can be reduced. Therefore, maintenance costs can be reduced. In addition, it is possible to improve the operating rate of the solid fuel pulverizer.

In addition, in the solid fuel crusher (100) according to one aspect of the present disclosure, the operating state includes at least one of information related to solid fuel type, cumulative operating time, and operating load.

In the above configuration, at least one of information about the type of solid fuel, the accumulated operating time, and the operating load is used as the operating state. Information about solid fuel type, cumulative operating hours, and operating load are factors that affect remaining life. Therefore, it is possible to effectively predict the transition of the remaining life in the future.

Further, the solid fuel crusher (100) according to one aspect of the present disclosure includes a planning section (55) that creates a maintenance plan based on the estimated remaining life.

In the above configuration, by creating a maintenance plan based on the estimated remaining life, it is possible to plan the maintenance timing with a margin. Therefore, it is possible to improve the operating rate of the solid fuel crusher. In the maintenance plan, for example, maintenance timing, an operation plan for adjusting the maintenance timing (for example, changing the type of solid fuel, etc.), load sharing adjustment in a plurality of fixed fuel crushers, etc. can be performed.

Further, the solid fuel crushing device (100) according to one aspect of the present disclosure includes a table liner (12a) fixed to the upper surface of the rotary table (12) and rotating together with the rotary table (12); 12a), a second detection unit that detects the amount of wear, and a second transmission unit that transmits information detected by the second detection unit by wireless communication. Receive information sent by the department.

With the above configuration, the amount of wear of the table liner can be detected and monitored without stopping the solid fuel pulverizer. The information detected by the second detection unit is also received by the reception unit that receives the information detected by the first detection unit. This reduces the number of parts and simplifies the configuration compared to the case where a receiving section for receiving information from the first detecting section and a receiving section for receiving information from the second detecting section are provided separately. be able to.

In addition, the solid fuel pulverization device (100) according to one aspect of the present disclosure is provided in the housing (11) and includes a deflection plate ( 15), a flow deflection plate liner (15a) fixed to the surface of the flow deflection plate (15), a third detection unit for detecting an amount of wear of the flow deflection plate liner (15a), and the third detection unit. a third transmitter for transmitting the received information by wireless communication, and the receiver (90) receives the information transmitted from the third transmitter.

With the above configuration, the amount of wear of the deflection plate liner can be detected and monitored without stopping the solid fuel pulverizer. The information detected by the third detection unit is also received by the reception unit that receives the information detected by the first detection unit. This reduces the number of parts and simplifies the configuration compared to the case where a receiving section for receiving information from the first detecting section and a receiving section for receiving information from the third detecting section are provided separately. be able to.

A boiler system (1) according to an aspect of the present disclosure includes the solid fuel pulverizer (100) according to any one of the above, and the solid fuel pulverized by the solid fuel pulverizer (100) is burned to produce steam. and a generating boiler.

A method for detecting the amount of wear of pulverizing rollers (13, 64) according to one aspect of the present disclosure includes a rotating table ( 12) A method for detecting the amount of wear of crushing rollers (13, 64) for crushing solid fuel placed thereon, wherein a detector (81) provided in the crushing rollers (13, 64) detects the amount of wear of the crushing rollers (13, 64). a step of detecting the amount of wear of the crushing rollers (13, 64); and transmitting, by wireless communication, the information detected by the detecting section (81) by a transmitting section (82) fixed to the crushing rollers (13, 64). and receiving the information transmitted from the transmitting section (82) by a receiving section (90).

1: Power plant (boiler system)
10: mill 11: housing
11a: inner peripheral surface 11b: side surface 12: rotary table 12a: table liner 13: roller (crushing roller)
14: Drive unit 15: Deviation plate 15a: Deviation plate liner 16: Rotary classifier 16a: Blade 17: Fuel supply unit 18: Motor 19: Exit (discharge unit)
20: Coal feeder 21: Bunker 22: Conveying unit 23: Motor 24: Down spout unit 25: Air outlet 26: Vane 27: Primary air duct (conveying gas supply unit)
30: Blower section 30a: Hot gas channel 30b: Cold gas channel 30c: Hot gas damper 30d: Cold gas damper 31: Primary air fan 32: Forced air fan 34: Heat exchanger 40: State detector 41: Bottom 42 : Ceiling 45 : Journal head 46 : Journal shaft 47 : Support arm 48 : Support shaft 49 : Pressing device 50 : Control unit 52 : Acquisition unit 53 : Estimation unit 54 : Prediction unit 55 : Planning unit 63 : Journal housing 64 : Roller Part 80: wear sensor 81: detection part (first detection part)
82: transmitter (second detector)
83 : Storage portion 84 : Hole portion 85 : Lead wire 86 : Partition 86a : First partition 86b : Second partition 86c : Third partition 90 : Receiving portion 91 : Storage portion 92 : Seal gas supply pipe (seal gas supply portion)
93: Partition window 94: Receiving antenna unit 95: Information transmitting/receiving unit 100: Solid fuel crusher 100a: Primary air flow path 100b: Supply flow path 101: Information aggregation system 102: Server 103: Planning system 200: Boiler 210: Furnace 220: Burner part

Claims (15)

a housing forming an outer shell;
a rotary table on which the solid fuel supplied in the housing is placed;
a crushing roller that is rotatable about a central axis and presses and crushes the solid fuel placed on the rotary table;
a first detection unit provided on the crushing roller for detecting an amount of wear of the crushing roller;
a first transmission unit that is fixed to the crushing roller and that transmits information detected by the first detection unit by wireless communication;
a receiving unit that receives the information transmitted from the first transmitting unit;
a housing section that forms a housing space that houses the receiving section ;
The solid fuel pulverizing device , wherein the accommodating portion is formed in the housing . A plurality of the first detection units are provided,
The solid fuel pulverizer according to claim 1, wherein the plurality of first detection units are spaced apart in a direction along the central axis and spaced apart in a circumferential direction of the pulverization roller. 3. The solid body according to claim 2, wherein at least one of the plurality of first detectors is provided at a position where it is most likely to be worn or is assumed to be most likely to be worn in the direction along the central axis. Fuel crusher. The first detection unit has a plurality of conducting wires positioned closer to the center axis than the outer peripheral surface of the crushing roller,
4. The solid fuel pulverization according to any one of claims 1 to 3, wherein the plurality of conducting wires are arranged such that the distances from the end on the outer peripheral surface side to the outer peripheral surface of the pulverizing roller are different. Device. The crushing roller is formed with a hole portion extending from the central axis side toward the outer peripheral surface side of the crushing roller,
The first detection unit is arranged in the hole,
5. Any one of claims 1 to 4, wherein the hole is provided with a partition wall that separates the space defined by the hole into a space on the side of the outer peripheral surface and a space on the side of the central axis. Solid fuel crusher as described. a discharge unit provided in the upper part of the housing for discharging the solid fuel crushed by the crushing roller to the outside of the housing;
a carrier gas supply unit that is provided vertically below the rotary table and supplies carrier gas for carrying the solid fuel pulverized by the pulverizing roller to the discharge unit to the inside of the housing,
6. The solid fuel crusher according to any one of claims 1 to 5, wherein the receiver is provided vertically above the rotary table in the housing. a seal gas supply unit that supplies seal gas to the housing space,
The solid fuel pulverizer according to any one of claims 1 to 6, wherein the housing space communicates with an internal space formed inside the housing. 8. The solid fuel pulverizer according to any one of claims 1 to 7, further comprising an estimating section for estimating a remaining life of said pulverizing roller based on the amount of wear detected by said first detecting section. A prediction unit for predicting future transitions in remaining life based on transitions in remaining life estimated by the estimating unit, based on a database in which operating conditions and life expectancy transition characteristics corresponding to the operating conditions are stored in advance. Item 9. The solid fuel crusher according to Item 8. 10. The solid fuel pulverizer according to claim 9, wherein the operating state includes at least one of information on solid fuel type, cumulative operating time, and operating load. The solid fuel pulverizer according to any one of claims 8 to 10, further comprising a planning section that creates a maintenance plan based on the estimated remaining life. a table liner fixed to the upper surface of the rotary table and rotating together with the rotary table;
a second detector that detects the amount of wear of the table liner;
A second transmission unit that transmits information detected by the second detection unit by wireless communication,
The solid fuel crusher according to any one of claims 1 to 11, wherein the receiving section receives information transmitted from the second transmitting section. a deflection plate provided in the housing for diverting the flow of the carrier gas flowing through the housing;
a deflector liner fixed to the surface of the deflector;
a third detector that detects the amount of wear of the deflection plate liner;
A third transmission unit that transmits information detected by the third detection unit by wireless communication,
The solid fuel crusher according to any one of claims 1 to 12, wherein the receiving section receives information transmitted from the third transmitting section. A solid fuel crusher according to any one of claims 1 to 13;
and a boiler that burns the solid fuel pulverized by the solid fuel pulverizer to generate steam. A method for detecting the amount of wear of a crushing roller for crushing a solid fuel placed on a rotating table and arranged rotatably around a central axis inside a housing that forms an outer shell, the method comprising:
a step of detecting the amount of wear of the crushing roller with a detection unit provided on the crushing roller;
a step of transmitting information detected by the detection unit by wireless communication using a transmission unit fixed to the crushing roller;
A method for detecting the amount of wear of a crushing roller, comprising the step of receiving information transmitted from the transmitting section by a receiving section housed in a housing space formed by a housing section formed in the housing .

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