CN104034748B - Alternating temperature rotating cylinder mechanism - Google Patents

Abstract

The invention discloses a temperature-variable rotating drum mechanism, which comprises an air inlet pipe (4), a rotating drum (6) and a rotating shaft (11). The rotating drum is installed at the end of the rotating shaft. Connects to the inner chamber of the drum. By adding an air inlet pipe, the temperature-changing gas can be passed in for temperature-changing. The drum can adopt a split form including a rotating drum part (61) and a fixed mounting part (62). The air intake pipe is connected to the fixed mounting part and communicated into the drum through the airflow channel arrangement on the rotating drum part and the fixed mounting part. In the chamber, when the rotating shaft drives the drum to rotate, the intake pipe will not be entangled. It is also possible to arrange the air inlet pipe, rotating drum and rotating shaft coaxially, the rotating shaft is connected to one side wall of the rotating drum to drive the rotating drum to rotate, and the air inlet pipe is then connected to the structure on the other side wall of the rotating drum. The structure of the temperature-variable drum mechanism is simple and compact, and the materials in the drum can be heated simultaneously while the drum rotates.

Description

Variable temperature drum mechanism

technical field

The invention relates to a rotating drum mechanism, in particular to a temperature-variable rotating drum mechanism capable of feeding a gas medium into the rotating drum for heating, and the variable-temperature rotating drum mechanism is especially suitable for a dynamic thermal stability measuring device of solid particles.

Background technique

Thermal stability is one of the important bases for solid particles such as coal, semi-coke, and briquettes in combustion, pyrolysis, and gasification. Thermal stability refers to the degree of stability of solid particles under the action of heat during high-temperature combustion or pyrolysis and gasification, that is, the performance of a coal sample with a certain particle size maintaining its original particle size after being heated. Coal with good thermal stability can be burned or pyrolyzed and gasified with its original particle size during combustion, pyrolysis, and gasification without breaking into small pieces or less fragmentation. Coal with poor thermal stability is rapidly broken into small pieces during combustion, pyrolysis, and gasification, and even becomes pulverized coal. For industrial layer-fired boilers or gas generators that require the use of lump coal as fuel or raw material, if coal with poor thermal stability is used, it will lead to increased carryover, uneven particle size distribution in the furnace, and increased fluid resistance in the furnace. The wind tunnel causes slagging, so that the entire pyrolysis, gasification process or combustion process cannot be carried out normally, which not only causes operational difficulties but also reduces combustion or pyrolysis and gasification efficiency.

In GB/T1573-2001 "Measurement Method for Thermal Stability of Coal" and "Measurement Method for Industrial Briquette Thermal Stability" of MT/T924-2004, the determination of solid particle samples represented by coal and coal briquettes is proposed respectively. Thermal stability determination method, which examines the thermal stability of solid particle samples under static conditions, that is, coal or briquettes with a certain particle size and quality are heated to a certain temperature in an air-isolated muffle furnace and then broken Degree. However, in the process of combustion or gasification, solid particles are not only subjected to thermal stress, but are actually broken due to the joint action of thermal stress, particle collision and mechanical wear. Therefore, the determination of the thermal stability of solid particles in the above two national standard measurement methods cannot truly reflect the degree of crushing and pulverization of solid particles in the actual process, because they do not take into account the collision and mechanical wear between particles in the actual industrial process , the result obtained is only the static thermal stability index of the sample. The results of this static thermal stability test are very different from the actual industrial utilization process, and cannot play a role in guiding production and design. In addition, despite the rapid development of medium and low temperature pyrolysis technology and the continuous increase in semi-coke production, there are still no relevant test methods and standards for semi-coke. For coal-based activated carbon, only its strength is tested in GB/T7702.3-2008 "Determination of Strength of Coal-based Granular Activated Carbon Test Method", and no relevant thermal stability measurement is used. Therefore, it is urgent to establish a set of devices and methods for evaluating the crushing and pulverization of solid particles that can simulate the actual industrial application process.

In the structural design of the dynamic thermal stability measurement device for solid particles, a common drum mechanism can be used, that is, solid particles are loaded in the drum mechanism to follow the rotation of the drum to simulate the mutual friction and collision of solid particles. However, how to achieve simultaneous heating of solid particles, especially by means of gas heating, and how to accelerate cooling during the cooling process of solid particles, in order to facilitate the investigation of the dynamic thermal stability of solid particles under chilling conditions and different chilling rates One of the difficulties in structural design is to make the structure of the drum mechanism simple and practical. Because if the inlet pipe of the heating gas is directly connected to the common rotating drum, the inlet pipe will inevitably be entangled or twisted, thereby hindering the rotation of the drum and making it difficult to realize the function of the device.

Contents of the invention

The object of the present invention is to provide a temperature-variable drum mechanism, which has a simple and compact structure, and can feed variable-temperature gas while the drum rotates to realize simultaneous heating or cooling of the substances in the drum.

In order to achieve the above object, the present invention provides a temperature-variable drum mechanism, which includes an air inlet pipe, a rotating drum and a rotating shaft, the rotating drum is installed at the end of the rotating shaft, and one end of the air inlet pipe is used It is connected to the air source, and the other end is connected to the inner chamber of the drum.

Preferably, the temperature-changing drum mechanism includes an exhaust pipe and a mounting sleeve, the mounting sleeve is fixedly sleeved on the rotating shaft, the rotating drum includes a rotating drum part and a fixed mounting part, and the rotating drum part is installed on The rotating shaft is connected to the fixed installation part, the fixed installation part is installed on the installation sleeve, the air intake pipe and the exhaust pipe are respectively connected to the fixed installation part, wherein the rotating cylinder An airflow channel communicating from the air intake pipe and the exhaust pipe to the inner chamber of the rotating cylinder part is formed on the part and the fixed installation part.

Preferably, the air flow channel includes an air intake ring, an exhaust ring, a top wall air channel and a bottom wall air channel, and the intake ring and the exhaust air channel are arranged on the rotating cylinder part and the On the first side wall connected to the fixed installation part, the top wall air passage and the bottom wall air passage are respectively arranged on the top wall and the bottom wall of the rotating cylinder part and communicate with the inner chamber of the rotating cylinder part, The air intake ring is respectively connected to the air intake pipe, the top wall air channel and the bottom wall air channel, and the exhaust air ring is connected to the inner chamber of the rotating cylinder part and the exhaust pipe.

Preferably, the first side wall includes a first ceramic sheet embedded in the first side wall for filtering gas, and the intake ring is formed on the first ceramic sheet and exhaust loop.

Preferably, the fixed installation part includes a second ceramic sheet for filtering gas, the second ceramic sheet is embedded in the fixed installation part and attached to the first ceramic sheet, and the second ceramic sheet is An air intake port and an exhaust port respectively communicated with the air intake ring and the exhaust ring are provided, and the air intake port and the exhaust port are respectively connected to the air intake pipe and the exhaust pipe.

Preferably, the first side wall is engaged with the rotating shaft by a keyway.

Preferably, the first side wall is detachably installed between the top wall and the bottom wall of the rotating cylinder.

Preferably, grooves are formed on the second side wall of the drum opposite to the first side wall.

Optionally, the air inlet pipe, the rotating drum and the rotating shaft are coaxially arranged, the rotating shaft is connected to one side wall of the rotating drum to drive the rotating drum to rotate, and the air inlet pipe is connected to the rotating shaft of the rotating drum on the other side wall.

Preferably, the intake pipe is connected to the side wall of the drum through a rolling bearing.

Preferably, an exhaust pipe is nested in the intake pipe, an annular channel is formed between the intake pipe and the exhaust pipe, the exhaust pipe extends into the inner chamber of the rotating drum, and the rotating drum An air flow channel is formed in the side wall and the peripheral wall of the cylinder, and the air flow channel communicates with the annular channel and the inner chamber of the rotating drum.

Preferably, the temperature-changing drum mechanism includes an exhaust pipe, the rotating shaft is a hollow shaft, and the exhaust pipe is arranged in the rotating shaft and extends into the inner chamber of the rotating drum.

Preferably, the above-mentioned variable temperature drum mechanism includes a rotating motor, a first gear is provided on the rotating shaft, a second gear is provided on the output shaft of the rotating motor, and an external mesh is formed between the first gear and the second gear transmission.

Through the above technical solution, in the above-mentioned variable temperature drum mechanism of the present invention, an air inlet pipe leading into the drum is added, through which temperature variable gas can be passed through for heating or cooling. Wherein, the drum can adopt a split form including a rotating drum part and a fixed mounting part, and the air inlet pipe is connected to the fixed mounting part and communicated with the inner chamber of the drum through the arrangement of airflow passages on the rotating drum part and the fixed mounting part, Therefore, when the rotating shaft drives the rotating cylinder to rotate, the intake pipe will not be entangled or the like. It is also possible to coaxially arrange the air inlet pipe, the rotating drum and the rotating shaft, the rotating shaft is connected to one side wall of the rotating drum to drive the rotating drum to rotate, and the air inlet pipe is then connected to the other side wall of the rotating drum. Similarly, The intake pipe will not be entangled or the like. Therefore, the structure of the variable temperature drum mechanism of the present invention is simple and compact, and the variable temperature gas can be fed into the drum while rotating, so as to realize the simultaneous heating of the substances in the drum, or to investigate the cooling conditions of solid particles and their different cooling rates. under dynamic thermal stability.

Other features and advantages of the present invention will be described in detail in the following detailed description.

Description of drawings

The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the description, together with the following specific embodiments, are used to explain the present invention, but do not constitute a limitation to the present invention. In the attached picture:

Fig. 1 is a structural schematic diagram of a dynamic thermal stability measuring device for solid particles using a temperature-variable drum mechanism according to a preferred embodiment of the present invention. The heating furnace in the figure is in the first closed position, that is, the furnace body and the side furnace The door is closed and the sliding cover is on the top of the furnace body;

Fig. 2 illustrates that the heating furnace of the dynamic thermal stability measuring device of solid particles in Fig. 1 is in the second closed position, that is, the body of furnace is separated from the side furnace door and the body of furnace is closed with the slide cover, wherein for the sake of clarity, also for The installation structure of the rotating shaft is shown in section;

Fig. 3 enlargedly shows the installation structure between the rotating drum, the rotating shaft and the side furnace door in the device of Fig. 2, and illustrates the arrangement of air flow passages between the rotating drum and the inlet pipe and the outlet pipe;

Fig. 4 is a cross-sectional view of the rotating cylinder part of the rotating cylinder shown in Fig. 3, wherein the first side wall connected with the fixed installation part has been removed from the rotating cylinder part;

Fig. 5 is the front view of the first ceramic sheet in the drum shown in Fig. 3;

Fig. 6 is the front view of the second ceramic sheet in the drum shown in Fig. 3;

Fig. 7 is a structural schematic diagram of a temperature-variable drum mechanism according to another preferred embodiment of the present invention;

Fig. 8 is a structural schematic diagram of a temperature-variable drum mechanism according to another preferred embodiment of the present invention.

Explanation of reference signs

1 Rack 2 Base

3 slide cover 4 intake pipe

5 exhaust pipe 6 drum

7 side furnace doors 8 rotating motors

9 first gear 10 second gear

11 shafts 12 heating furnace

13 drag chain 14 linear motor

15 Support rod 16 Installation sleeve

17 first ceramic sheet 18 second ceramic sheet

19 Positioning sleeve 20 First side wall

21 compression spring mechanism 22 second side wall

61 rotating cylinder part 62 fixed installation part

A intake port B exhaust port

detailed description

Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

In the present invention, unless stated otherwise, the used orientation words such as "up and down" are usually for the direction shown in the drawings or for the vertical, vertical or gravity direction Words used to describe the mutual positional relationship of each component.

As mentioned above, in order to better simulate the crushing and pulverization of solid particles in the actual industrial application process, that is, solid particle samples, such as coal, semi-coke, briquette or activated carbon, are Among them, due to the crushing and pulverization phenomenon caused by the collision between particles, mechanical wear and thermal stress caused by heating, the present invention proposes a method for measuring the dynamic thermal stability of solid particles. At the same time, it makes the solid particles move to realize the mutual friction and collision of the solid particles. As a general technical concept, in order to distinguish the thermal stability effect measured by heating the sample under the condition that the solid particles such as coal are only considered in the prior art and the standard when the sample is kept still, on the basis of heating the solid particles The dynamic simulation of the collision and friction of solid particles has been added to better reflect the factors such as particle rolling collision and mechanical wear in the particle crushing and pulverization process in the actual industry.

On the basis of the above-mentioned general technical conception, in order to quantitatively analyze the phenomenon of solid particle crushing and pulverization in the above process, on the basis of the existing thermal stability measurement method of coal, the dynamic thermal stability index is introduced as the evaluation method of solid particle The degree of pulverization in the above process. The dynamic thermal stability mentioned here is the property that the solid sample is subject to the thermal stress generated by high temperature while maintaining the original particle size due to collision and abrasion, and a set of test methods for retaining on the test sieve is established. The mass fraction of the sample mass in the original sample is used as the method of dynamic thermal stability index. Moreover, a set of special test equipment was developed for simulating the above process, which will be explained one by one below.

In order to realize the movement of the solid particles while heating the solid particles to realize the mutual friction and collision of the solid particles, and to better simulate the actual industrial application process, it is possible to put a solid particle sample of a certain size into the drum or vibrate In moving mechanisms such as sieves, to follow the moving mechanism to generate rotation or vibration, so that the solid particles follow to vibrate or roll, and collision and mechanical wear occur between particles and between particles and the moving mechanism. Specifically in the following embodiments, referring to FIG. 1 , the solid particles are loaded into the drum 6 and driven to rotate, so that the solid particles move in the drum 6 . It is more convenient to use the rotating drum to control the intensity of solid particle movement, which can be quantified through the speed control, so it is more appropriate to use the rotating drum as the moving mechanism in the test. The heat for heating the solid particles can be heat radiation from an electric furnace, etc., or a gas heat carrier from the outside. Referring to Fig. 1, as two optional heating modes, the drum 6 loaded with solid particles can be put into the heating furnace 12 to be heated, and/or hot gas is passed into the drum 6 to treat the solid particles. heating. In this way, the coal sample in the drum 6 can be crushed due to the comprehensive action of particle collision, mechanical wear and thermal stress.

In the determination of dynamic thermal stability of solid particles, in order to obtain specific dynamic thermal stability indicators, the mass fraction of the sample retained on the test sieve to the original sample is taken as the reference standard. Specifically, after solid particles such as coal samples pass through the moving drum 6 for a period of time, the coal samples can be weighed and sieved after being cooled. When screening and establishing index parameters, solid particles with different components should be treated differently. For example, for coal samples and semi-coke, the percentage of residual coke with a particle size greater than 6mm in the sum of residual coke at all levels can be used as the dynamic thermal stability index DTS ₊₆ ; The percentages of the quality in the sum of the residual coke quality at all levels are used as the auxiliary indicators of dynamic thermal stability DTS _3-6 and DTS _-3 . For coal briquettes, the percentage of residual coke with a particle size greater than 13mm in the sum of residual coke at all levels can be used as the dynamic thermal stability index DTS ₊₁₃ ; And the percentage as thermal stability auxiliary index DTS _-3 . For the coal-based activated carbon with higher strength, optionally, a plurality of steel balls can be put into the drum 6 as needed to enhance collision and wear, so that the mass fraction of the original activated carbon retained on the test sieve is used as the mass fraction of the activated carbon. Dynamic thermal stability index.

Through the method introduced above, under the action of thermal radiation or thermal stress generated by gas heat carrier, the collision between sample particles and the wear between particles and mechanical equipment can be investigated, and the dynamic thermal stability index of solid samples can be obtained. The index can better reflect the crushing and pulverization of particles in the actual industrial process. The above is only a theoretical description of the above method, and the above method will be described in detail below in conjunction with the dynamic thermal stability measurement device for solid particles developed to realize the above method.

Firstly, a device for measuring the dynamic thermal stability of solid particles is introduced. In order to realize that the solid particles are heated while making the solid particles move so as to realize the mutual friction and collision of the solid particles, the device of the present invention should at least include a movement mechanism for loading the solid particles and a movement mechanism for solid particles in the overall functional structure. The heating mechanism for heating the particles, and the movement mechanism is driven by the actuating mechanism to drive the solid particles to move accordingly, so as to realize the mutual friction and collision of the solid particles.

As a preferred embodiment, as shown in Fig. 1 and Fig. 2, a rotary actuating mechanism, a rotating cylinder 6 and a heating mechanism are used respectively, solid particles are loaded into the rotating cylinder 6, and the rotating cylinder 6 is driven by the rotating actuating mechanism rotate. This way the solid particles roll and collide with each other in the drum to simulate the actual dynamic process in industrial application process.

As shown in FIG. 1 and FIG. 2, the dynamic thermal stability measuring device of solid particles also includes a base 2, and the heating mechanism includes a heating furnace 12, and the heating furnace 12 and the rotating drum 6 are installed above the base 2 in an adjustable position. So that the drums 6 can be located in the heating furnace 12 or located outside the heating furnace 12 and spaced apart from each other. In other words, the heating furnace 12 can be used to heat the solid particles. The heating furnace 12 and the rotating drum 6 are installed on the base 2 and can be close to or far away from each other. For example, the heating furnace 12 is fixed, and the rotating drum 6 can be horizontally Or move in/out of the furnace body of the heating furnace 12 vertically. In the device structure of this embodiment, the heating furnace 12 is moved while the drum 6 is stationary, as shown in Figures 1 and 2, so as to make the moving structure simpler and easier to operate.

In this embodiment, the device further includes a frame 1 and a rotating shaft 11 , the rotating shaft 11 is arranged horizontally and mounted on the frame 1 , and the drum 6 is mounted on the end of the rotating shaft 11 . The rotating shaft 11 can drive the rotating drum 6 to rotate, and the rotating shaft 11 extends horizontally and cannot be extended, so the rotating drum 6 is fixed in position and can be accommodated in the movable heating furnace 12 . The horizontal movement between the rotary drum 6 and the heating furnace 12 is more convenient than the vertical movement, saves energy, and can avoid the inconvenience caused by the high-temperature gas emerging from the top of the heating furnace when moving in the vertical direction. May hurt. In addition, the above-mentioned rotary actuating mechanism preferably adopts a rotary motor 8, a first gear 9 is provided on a rotating shaft 11, a second gear 10 is provided on an output shaft of the rotary motor 8, and a gear 10 is formed between the first gear 9 and the second gear 10. External gearing. The rotary motor 8 drives the rotary drum 6 to rotate through the simplest transmission mode like this.

As shown in Figure 1 or Figure 2, in order to make the heating furnace 12 movable and the heating furnace is convenient to close or open, the heating furnace 12 here is designed to include a furnace body and a side furnace door 7, which is sleeved on the rotating shaft 11 Above, the furnace body of the heating furnace 12 is installed on the base 2 in a position movably along the direction of the central axis of the rotating shaft 11 . The furnace body of the heating furnace 12 can be connected with a linear motor 14 , which can be fixedly installed on the base 2 or the frame 1 , and its output shaft is used to move the furnace body along the central axis of the rotating shaft 11 . In addition, the bottom of the furnace body of the heating furnace 12 can be provided with a drag chain 13, and the drag chain is used for reciprocating motion to pull and protect the cables, oil pipes, gas pipes, water pipes, etc. built in the furnace body. Each section of the drag chain can be opened for easy installation and maintenance. Low noise, wear-resistant and high-speed movement during exercise.

In the heating furnace 12 of the device shown in Figures 1 and 2, it should be particularly noted that, for the sake of safety, the heating furnace 12 also includes a slide cover 3 that is connected to the frame 1 in a movably connected manner, especially in a hinged manner. , the furnace body of the heating furnace 12 has a first closed position and a second closed position in the moving direction, wherein in the first closed position as shown in FIG. In the furnace 12, the slide cover 3 is positioned on the top of the body of heater. In the second closed position as shown in Figure 2, the furnace body is separated from the side furnace door 7 and the drum 6 is located outside the heating furnace 12, the sliding cover 3 rotates around the hinge point on the frame 1 to the opening side of the furnace body and closes The furnace body. Those skilled in the art can understand that the hinged structure between the slide cover 3 and the frame 1 should be designed in combination with the moving stroke of the heating furnace 12, such as the position of the hinge point, the shape, length, and amplitude of the hinged arm, etc. And a guiding and moving mechanism may also be provided between the sliding cover 3 and the furnace body, so that the above-mentioned matching relationship between the sliding cover 3 and the heating furnace 12 is finally formed mechanically. Because above-mentioned for example the design of articulated arm shape size design or guiding moving mechanism, all is common knowledge or conventional design that can be understood and known by those skilled in the art, as long as provide the concrete setting between slide cover 3 and heating furnace 12 For the cooperation relationship, those skilled in the art can design a variety of cooperation sliding structures, only one hinge structure is shown in Figure 1 and Figure 2, and other modes or specific structural details will not be repeated here. Through this cooperative relationship between the sliding cover 3 and the heating furnace 12, after the furnace body removes the side furnace door 7 to take out the solid particles in the rotating drum 6, the sliding cover 3 The furnace 12 can be closed automatically and instantly. Since the temperature inside the furnace is as high as nearly 1000°C, it can avoid heat escape and injury to operators.

As shown in Figure 2, the inner wall of the furnace body can also be provided with a support rod 15 protruding toward the rotating shaft 11, and the outer wall of the drum 6 (that is, the second side wall 22 shown in Figure 7) is formed with a support rod 15. matching grooves. In the first closed position shown in FIG. 1 , the support rod 15 is inserted into the groove. The support rod 15 is arranged on the extension line of the central axis of the rotating shaft 11, so that when the drum 6 is heated and rotated in the heating furnace 12 as shown in FIG. In addition, in the device shown in FIG. 1 , the actuating mechanism is mainly the rotating motor 8, the linear motor 14 and the electric furnace as the heating furnace 12, and the parameters to be controlled are mainly the rotating speed of the drum 6, the heating temperature of the heating furnace 12, The control logic of the moving stroke of the heating furnace 12 is simple and easy to realize. Those skilled in the art can know that the above-mentioned control can be realized through a variety of control methods, such as PLC control combined with motor frequency conversion control, and realized through simple electronic control wiring, so the specific control method and control logic are also no longer discussed here. and control structures are described in detail. As shown in Fig. 1 or Fig. 2, buttons for controlling the rotating motor 8, the linear motor 14 and the heating furnace 12 are provided on the left end of the base 2, and the control operation can also be performed through a humanized control interface, such as the right end of the base 2 Several squares are the display screen, and the operator can conveniently operate by observing the motor speed and heating temperature displayed on the display screen.

Through the above description of the main structural components and their installation and matching structure, the above-mentioned method for measuring the dynamic thermal stability of solid particles can be basically realized through this device, that is, the solid particles are heated while causing the solid particles to move to achieve Mutual friction and collision of solid particles. The main components will be further elaborated and extended in the following, so that those skilled in the art can better and more specifically understand the device for measuring dynamic thermal stability based on solid particles.

First of all, the heating furnace 12 needs to be specially explained. The heating furnace 12 used in the above-mentioned dynamic thermal stability measurement device for solid particles is completely different from the common heating furnace with a cover on the top. The heating furnace 12 in the present embodiment includes a furnace body and a side furnace door 7, one of the furnace body and the side furnace door 7 (or both the furnace body and the side furnace door 7) can be moved so as to be compatible with The other of the furnace body and the side furnace door 7 is disconnected and spaced apart, or engaged with the other to close the heating furnace 12 . In other words, the heating furnace 12 can also be in a manner in which the furnace body is fixed and the side furnace door 7 moves, but as an example, the following description will only be made in a manner in which the side furnace door 7 is fixed and the furnace body can move as shown in FIG. 1 . By setting the furnace door on the side of the furnace body and a part of the heating furnace 12 can be moved, the operator can safely and conveniently take the heating object from the heating furnace 12 to avoid burns, and the movable closed structure of the heating furnace 12 It is also convenient for automatic control, that is, to realize action control of the heating furnace 12 . The setting of slide cover 3 can also prevent the heat in the heating furnace 12 from escaping.

Wherein, the side furnace door 7 is preferably provided with a loading container for holding heated objects, such as the drum 6 shown in FIG. 1 , and the loading container protrudes from the inner wall of the side furnace door 7 toward the furnace body. By connecting the loading container to the side furnace door 7, after the heating is completed, the operator can obtain the heating object on the loading container with the separation of the side furnace door 7 and the furnace body, or go to the loading container to load the heating object . The heating furnace 12 can be installed on the frame 1 and the base 2 , the side furnace door 7 is fixedly connected to the frame 1 , and the furnace body is movably arranged on the base 2 relative to the side furnace door 7 . Specifically, as shown in FIG. 3 , the side furnace door 7 can be fixedly installed on the installation sleeve 16 sleeved on the rotating shaft 11 , and the installation sleeve 16 is connected to the frame 1 , which will be described in detail below. In addition, as shown in Fig. 2 and Fig. 3, a compression spring mechanism 21 can also be provided between the side furnace door 7 and the frame 1, and the compression spring mechanism 21 is used to bias the side furnace door 7 toward the direction of the furnace body, so as to Provide pressing force to side furnace door 7, and close side furnace door 7 tightly.

The heating furnace 12 is not limited to being driven by the linear motor 14 as shown in FIG. 2 , and can also be driven by other methods, such as manual operation combined with slide rails or screw rods. The base 2 can be provided with a slide rail arranged along the moving direction of the furnace body relative to the side furnace door 7. The slide rail is provided with a sliding block for sliding fit, and the furnace body is connected with the slide block, thereby pushing the furnace body in a sliding manner. body moves. For the convenience of pushing, the base 2 is preferably equipped with a screw rod, which is arranged in the slide rail and fixedly connected with the slider. In this way, the operator can simply and effortlessly push the furnace body to move in a straight line by shaking the handle. In addition, as mentioned above, the heating furnace 12 includes a sliding cover 3, and the sliding cover 3 is used to engage with the furnace body when the furnace body is spaced apart from the side furnace door 7, so as to close the furnace body. Setting the slide cover 3 can prevent the heat from escaping after the body of furnace is separated from the side furnace door 7. It can be set manually, electronically, or mechanically, and will not be repeated here.

In addition, a temperature-variable drum mechanism will be introduced in detail below in conjunction with the dynamic thermal stability measurement device for solid particles shown in FIG. 1 and FIG. 2 . As shown in Figure 7 or Figure 8, the temperature-variable drum mechanism includes an air inlet pipe 4, a rotating drum 6 and a rotating shaft 11, the rotating drum 6 is installed at the end of the rotating shaft 11, one end of the air inlet pipe 4 is connected to the air source, and the other end is connected to the The inner chamber of the drum 6. Wherein, the rotating shaft 11 can drive the rotary drum 6 to rotate, and the air inlet pipe 4 can feed heating gas or cooling gas into the rotary drum 6. As an optional heating method, it can be used as a separate heating method or combined with a heating furnace 12. Used to constitute the heating mechanism in the dynamic thermal stability measurement device. However, due to the rotation of the drum 6, when the hot gas is passed into the drum through the intake pipe 4, it should be ensured that the intake pipe 4 will not follow the rotation of the drum 6 and cause problems such as entanglement.

For this reason, it is necessary to make the cylinder body of the rotary drum 6 rotate but the intake pipe 4 is relatively stationary. As a preferred embodiment, as shown in Figure 7, the variable temperature drum mechanism also includes an exhaust pipe 5 and an installation sleeve 16, the installation sleeve 16 is fixedly sleeved on the rotating shaft 11, and the drum 6 includes a rotating drum portion 61 and a fixed installation part 62, the rotating cylinder part 61 is installed on the rotating shaft 11 and connected with the fixed installation part 62, the fixed installation part 62 is installed on the installation sleeve 16, and the intake pipe 4 and the exhaust pipe 5 are respectively connected to the fixed installation part 62 , wherein the rotating cylinder part 61 and the fixed installation part 62 are formed with an airflow channel communicating from the intake pipe 4 and the exhaust pipe 5 to the inner chamber of the rotating cylinder part 61 . Wherein, the mounting sleeve 16 can be directly fixedly connected to the shell of the frame 1 , or as shown in FIG. 2 , can be mounted on a vertical mounting rod in the frame 1 through a more complex structure. Like this, the fixed installation part 62 of intake pipe 4, exhaust pipe 5 and rotating cylinder 6 can be fixedly installed on the installation sleeve 16, and the rotating cylinder part 61 of rotating cylinder 6 is then driven to rotate by rotating shaft 11, passes through between the two. The gas passage in the drum 6 is provided to realize gas communication.

Specifically, as shown in Figures 4 to 7, the above-mentioned air flow channel preferably includes an intake ring, an exhaust ring, a top wall air channel and a bottom wall air channel, the intake ring and the exhaust ring (Fig. 4 not shown) can be arranged on the first side wall 20 of the rotating cylinder part 61 connected to the fixed installation part 62, the top wall air passage and the bottom wall air passage are respectively arranged on the top wall and the bottom wall of the rotating cylinder part 61 and It communicates with the inner chamber of the rotating cylinder part 61 , the air intake ring communicates with the air intake pipe 4 , the top wall air channel and the bottom wall air channel respectively, and the exhaust ring communicates with the inner chamber of the rotating cylinder part 61 and the exhaust pipe 5 . Wherein, since the intake ring and the exhaust ring are formed to be ring-shaped and arranged on the first side wall 20, even if the first side wall 20 rotates, it can still be connected with the intake port and the exhaust port on the fixed installation part 62. connected. As shown in FIG. 4 , multiple air inlets can be opened on the top wall and the bottom wall of the rotating cylinder 61 to communicate with the inner chamber of the rotating drum 6 , so that the air intake can be uniform and the deepest solid particles in the inner chamber can be heated.

The rotating cylinder part 61 of the rotating drum 6 is connected in rotation with the fixed installation part 62. In order to ensure airtightness, a gas dynamic seal should be provided between the two, for example, a sealing ring and the like should be provided. However, in this embodiment, in order to better form a seal and filter solid particles and micro-impurities that flow out with the hot gas, ceramic sheets are introduced. That is: as shown in FIG. 5 , the first side wall 20 includes a first ceramic sheet 17, which is embedded in the first side wall 20 for filtering gas, and the first ceramic sheet 17 is formed with Intake ring and exhaust ring. And as shown in Figure 6, the fixed installation portion 62 includes a second ceramic sheet 18 for filtering gas, the second ceramic sheet is embedded in the fixed installation portion 62 and bonded with the first ceramic sheet 17, the second ceramic sheet The ceramic sheet 18 is provided with an intake port A and an exhaust port B respectively connected with the intake ring and the exhaust ring, and the intake port A and the exhaust port B are respectively connected to the intake pipe 4 and the exhaust pipe 5 . In this way, through the lamination of the first ceramic sheet 17 and the second ceramic sheet 18, the air intake port A is always connected with the intake ring of the outer ring in the first ceramic sheet 17, and the exhaust port B is always connected with the first ceramic sheet. The exhaust ring of the inner ring in 17 is connected. The close contact between the first ceramic sheet 17 and the second ceramic sheet 18 can be realized by the mutual installation positional relationship between the rotating cylinder part 61 and the fixed installation part 62 . For example, the fixed mounting part 62 is fixedly mounted on the mounting sleeve 16, and the rotating cylindrical part 61 can cooperate with the keyway between the first side wall 20 and the rotating shaft 11, so that the rotating cylindrical part 61 is attached to the fixed mounting part 62 to press Close the first ceramic sheet 17 and the second ceramic sheet 18.

In addition, the first side wall 20 is preferably detachably installed between the top wall and the bottom wall of the rotating cylinder portion 61 . As shown in Figure 4, it is the part of the rotating cylinder part 61 after the first side wall 20 is removed. It can be seen from the figure that after the solid particles are heated and rotated in the rotating cylinder 6, the rotating cylinder part 61 can be unloaded and the first side wall can be taken out. The first ceramic sheet 17 in the side wall 20, and then the first side wall 20 shown in Figure 4 is taken out from the part between the top wall and the bottom wall, so that the solid particles inside can be easily taken out and screened. Heavy. Similarly, when solid particles are loaded into the inner chamber of the drum, the operation can be reversed to assemble the drum 6 .

As shown in Figure 8, as another embodiment, the variable temperature drum mechanism includes a coaxially arranged air intake pipe 4, a drum 6, and a rotating shaft 11, and the rotating shaft 11 is connected to one side wall of the drum 6 to drive the The drum 6 rotates, and the air intake pipe 4 is connected to the other side wall of the drum 6 . In other words, the rotating shaft 11 and the air intake pipe 4 are respectively connected to the two side walls of the drum 6 and arranged coaxially. When the rotary shaft 11 drives the rotary drum 6 to rotate, the intake pipe 4 can be formed relatively static, thereby obtaining another temperature-variable rotary drum mechanism with the same function as shown in FIG. 7 .

Wherein, the intake pipe 4 can be located on the extension line of the central axis of the rotating shaft 11 and connected to the side wall of the drum 6 through rolling bearings or the like. In this way, by setting the rolling bearing to realize that the intake pipe 4 does not move and the rotating cylinder 6 rotates, or the sliding rolling and sliding sealing similar to the sliding bearing is realized between the intake pipe 4 and the rotating cylinder 6, thereby solving the problem that the intake pipe 4 follows the rotation of the rotating cylinder 6 And there are problems such as entanglement.

An exhaust pipe 5 can be nested in the intake pipe 4, and an annular passage is formed between the air intake pipe 4 and the exhaust pipe 5. The exhaust pipe 5 extends into the inner chamber of the drum 6, and the side of the drum 6 An air flow channel is formed in the wall and the peripheral wall, and the air flow channel communicates with the annular channel and the inner chamber of the drum 6 . That is to say, the side wall and the peripheral wall of the rotating drum 6 are preferably formed into a sandwich wall structure, and an airflow passage is formed in the middle of the sandwich wall, and the airflow passage is connected with the annular passage between the intake pipe 4 and the exhaust pipe 5, thereby connecting the intake pipe 4 The hot gas flowing in from the center is evenly distributed to all parts of the inner chamber of the drum 6 . As shown in Figure 8, the intake pipe 4 can be installed in the rightmost clamping wall of the right side wall of the drum 6 through a rolling bearing, and the end of the intake tube 4 ends between the clamping walls of the right side wall, and the intake tube 4 can also be It plays a role of supporting the drum 6 instead of the support rod 15 . And the exhaust pipe 5 is installed in the left clamping wall of the right side wall by rolling bearings and is inserted in the inner chamber of the rotating drum, so as to lead out the temperature-changing gas in the inner chamber. Of course, as another optional installation method, the rotating shaft 11 can be designed as a hollow shaft, and the exhaust pipe 5 is sleeved in the rotating shaft 11 and extends into the inner cavity of the rotating drum 6 by referring to the method of being sleeved in the intake pipe 4 In the chamber, the temperature-changing gas is led out on the other side.

On the basis of the above-mentioned detailed description of the heating furnace 12 and the temperature-variable drum mechanism, it can be known that the gas heating method can also be used on the dynamic thermal stability measuring device of the solid particles using the heating furnace 12 and the temperature-variable drum mechanism, that is, The heating mechanism also includes an inlet pipe 4 and an exhaust pipe 5 connected to the drum 6 , one end of the inlet pipe 4 is connected to an air source, and the other end and the exhaust pipe 5 are connected to the inner chamber of the drum 6 . That is, the gas heating method and the furnace heating method can be used in combination. In addition, gas for quenching can also be introduced through the inlet pipe 4 to investigate the thermal stability of solid particles under the conditions of chilling and different chilling rates, which will be described in detail below.

When the gas heating method is used in combination, as shown in Figure 3, the side furnace door 7 and the drum 6 are installed on the installation sleeve 16 at intervals, and a positioning sleeve 19 is provided between the side furnace door 7 and the drum 6, and the installation sleeve A stepped portion is formed on the pipe 16 , and the two sides of the side furnace door 7 abut against the stepped portion and the positioning sleeve 19 respectively. In this way, the side furnace door 7 is axially positioned and fixedly installed on the installation sleeve 16 . At this time, the side furnace door 7 may be provided with a through hole, and the intake pipe 4 and the exhaust pipe 5 pass through the through hole and are connected to the drum 6 . The side furnace door 7 now plays a supporting role to the intake pipe 4 and the exhaust pipe 5 . In addition, in order to make the side furnace door 7 and the furnace body close tightly at the above-mentioned first closed position, a pre-tightening force towards the furnace body should be applied on the side furnace door 7 . Therefore, as shown in Figures 2 and 3, a compression spring mechanism 21 can also be provided, and the two ends of the compression spring mechanism are finally biased on the frame 1 and the installation sleeve 16 to push the side furnace towards the direction of the furnace body. door 7.

In summary, on the basis of the detailed description of the above-mentioned device for measuring the dynamic thermal stability of solid particles and its components, the heating furnace 12 and the variable temperature drum mechanism, the measurement steps of the method for measuring the dynamic thermal stability of solid particles can be specifically designed. As shown in Fig. 1 and Fig. 2, firstly, a sample of a certain quality and particle size range can be put into the rotating drum 6, and the rotating drum 6 is connected with the rotating shaft 11, and the heating furnace 12 can provide heat in the form of thermal radiation. The heating method in the form of gas heat carrier can enter the hot gas from the intake pipe 4 into the drum and heat the sample, and then discharge it from the exhaust pipe 5. Then set the rotation speed of the rotating drum 6 on the base 2. After the sample stays at the predetermined temperature for the required time, cool and weigh the sample, and finally pour the sample into a suitable sieve, cover and fix it, and sieve . The on-sieve mass was compared to the total sieve mass as an indicator of dynamic thermal stability.

The following specific embodiments are used to test the dynamic thermal stability of solid particle samples with a particle size of 2-30mm. In the device shown in FIG. 1 and FIG. 2 , the intake pipe 4 and the exhaust pipe 5 can be switched on and off by needle valves, so as to realize the sealing and unblocking of the drum 6 . The control buttons on the base 2 are respectively for realizing the switch of the rotating motor 8, the electric furnace 12 and the linear motor 14, and the display screen on the base 2 can show the temperature and the rotating drum rotating speed of the intake pipe 4, the exhaust pipe 5, the rotating drum 6. Put a sample of a certain particle size into the rotating drum 6, adjust the rotating motor 8 to drive the rotating shaft 11 through the control button, so that the rotating drum 6 reaches the required speed, and the linear motor 14 controls the electric furnace body to move forward until it completely wraps the rotating drum 6. The drum 6 is heated by the heating furnace 12 to a predetermined temperature; when the gas heat carrier is used to rapidly heat the sample, the hot gas enters the drum 6 from the intake pipe 4 and exchanges heat with the sample, and then flows from the exhaust pipe 5 discharge.

In the following specific embodiments, coal, semi-coke, briquette and activated carbon will be taken as examples to specifically describe the dynamic thermal stability measurement method and the acquisition of dynamic thermal stability indicators, but it should be noted that solid particles are not limited to the above four types . In order to facilitate the test and refer to national standards and industry standards, the heating temperature of the solid particles is preferably set at 835°C to 865°C, and the rotating speed of the drum 6 is not higher than 80r/min, preferably 30r/min to 50r/min.

Specific implementation mode one: dynamic thermal stability determination method of coal

1. According to the provisions of GB474, prepare about 1.5Kg of an air-dried coal sample with a particle size of 6-13mm. After mixing, take a 500cm ³ coal sample and weigh it (accurate to 0.01g).

2. Put the coal sample into the drum 6, and connect the drum 6 with the rotating shaft 11. Close the intake pipe 4 and the exhaust pipe 5 to isolate the air, and quickly send the drum 6 into the constant temperature zone of the heating furnace 12 that has been heated to 900°C. into the drum, the gas is discharged through the exhaust pipe 5 through the coal seam thickness.) Turn on the rotary switch, set the speed at 50r/min, adjust the furnace temperature to (850±15)°C, and make the coal sample rotate at this temperature for 30min . When the coal sample is just sent into the heating furnace 12, the furnace temperature may drop, and at this time, it is required to restore the furnace temperature to (850±15) °C within 8 minutes, otherwise the measurement will be invalid.

3. Take out the drum 6 from the heating furnace 12, cool it down to room temperature, weigh the total mass of residual coke (accurate to 0.01g), stack the sieves and sieve trays with apertures of 6mm and 3mm on the vibrating sieve machine, and put Pour the weighed residual coke into a 6mm sieve, cover the sieve cover and fix it, start the vibrating sieve machine, and sieve for 10 minutes.

4. Weigh the mass of all levels of residual coke with a particle size greater than 6mm, 3-6mm and less than 3mm after sieving (accurate to 0.01g), add the mass of all levels of residual coke to the total residual coke before sieving Compared with the mass, the difference between the two should not exceed ±1g, otherwise the determination will be invalid.

5. The dynamic thermal stability index and auxiliary index of coal are calculated according to formulas (1) to (3):

${\mathrm{<span\; class="notranslate">\; DTS</span>}}_{<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; 6</span>}}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; m</span>}}_{<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; 6</span>}}}{\mathrm{<span\; class="notranslate">\; m</span>}}<span\; class="notranslate">\; \&times;</span>\mathrm{<span\; class="notranslate">\; 100</span>}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span>$

${\mathrm{<span\; class="notranslate">\; DTS</span>}}_{\mathrm{<span\; class="notranslate">\; 3</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 6</span>}}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; m</span>}}_{\mathrm{<span\; class="notranslate">\; 3</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 6</span>}}}{\mathrm{<span\; class="notranslate">\; m</span>}}<span\; class="notranslate">\; \&times;</span>\mathrm{<span\; class="notranslate">\; 100</span>}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 2</span>}<span\; class="notranslate">\; )</span>$

${\mathrm{<span\; class="notranslate">\; DTS</span>}}_{<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 3</span>}}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; m</span>}}_{<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 3</span>}}}{\mathrm{<span\; class="notranslate">\; m</span>}}<span\; class="notranslate">\; \&times;</span>\mathrm{<span\; class="notranslate">\; 100</span>}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 3</span>}<span\; class="notranslate">\; )</span>$

In the formula: DTS ₊₆ - dynamic thermal stability index of coal, unit is %;

DTS _3-6 , DTS _-3 - the auxiliary index of dynamic thermal stability of coal, the unit is %;

m——the sum of residual focus masses at all levels, the unit is g;

m ₊₆ - residual focus mass with a particle size greater than 6mm, in g;

m _3-6 - residual focus mass with a particle size of 3-6 mm, in g;

m _-3 — mass of residual focus with particle size less than 3mm, unit is g.

6. Carry out a parallel sample experiment according to the above method, and calculate the average value of the two repeated determinations of the residual focus indicators at all levels.

7. Round off the evaluation values of all levels of residual focus indicators to one decimal place according to the data rounding rules stipulated in GB/T483, and report it as the final result.

Specific implementation mode two: method for measuring dynamic thermal stability of semi-coke

1. Prepare about 1.5Kg of an air-dried semi-coke sample with a particle size of 6-13mm according to the provisions of GB474. After mixing, take a 500cm3 semi-coke sample and weigh it (accurate to 0.01g).

2. Put the semi-coke sample into the drum 6, and connect the drum 6 with the rotating shaft 11. Close the intake pipe 4 and the exhaust pipe 5 to isolate the air, and quickly send the drum 6 into the constant temperature zone of the heating furnace 12 that has been heated to 900°C. into the drum, and the gas is discharged from the exhaust pipe 5 through the thickness of the coal seam.) Turn on the rotary switch, set the speed at 50r/min, adjust the furnace temperature to (850±15)°C, and make the semi-coke sample rotate at this temperature 30min. When the semi-coke sample is just sent into the heating furnace 12, the furnace temperature may drop. At this time, it is required to restore the furnace temperature to (850±15) ℃ within 8 minutes, otherwise the measurement will be invalid.

3. Take out the drum 6 from the heating furnace 12, cool it down to room temperature, weigh the total mass of residual coke (accurate to 0.01g), stack the sieves and sieve trays with apertures of 6mm and 3mm on the vibrating sieve machine, and put Pour the weighed residual coke into a 6mm sieve, cover the sieve cover and fix it, start the vibrating sieve machine, and sieve for 10 minutes.

4. Weigh the mass of all levels of residual coke with a particle size greater than 6mm, 3-6mm and less than 3mm after sieving (accurate to 0.01g), add the mass of all levels of residual coke to the total residual coke before sieving Compared with the mass, the difference between the two should not exceed ±1g, otherwise the determination will be invalid.

5. The dynamic thermal stability index and auxiliary index of semi-coke are calculated according to formula (1)~(3):

${\mathrm{<span\; class="notranslate">\; DTS</span>}}_{<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; 6</span>}}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; m</span>}}_{<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; 6</span>}}}{\mathrm{<span\; class="notranslate">\; m</span>}}<span\; class="notranslate">\; \&times;</span>\mathrm{<span\; class="notranslate">\; 100</span>}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span>$

${\mathrm{<span\; class="notranslate">\; DTS</span>}}_{\mathrm{<span\; class="notranslate">\; 3</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 6</span>}}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; m</span>}}_{\mathrm{<span\; class="notranslate">\; 3</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 6</span>}}}{\mathrm{<span\; class="notranslate">\; m</span>}}<span\; class="notranslate">\; \&times;</span>\mathrm{<span\; class="notranslate">\; 100</span>}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 2</span>}<span\; class="notranslate">\; )</span>$

${\mathrm{<span\; class="notranslate">\; DTS</span>}}_{<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 3</span>}}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; m</span>}}_{<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 3</span>}}}{\mathrm{<span\; class="notranslate">\; m</span>}}<span\; class="notranslate">\; \&times;</span>\mathrm{<span\; class="notranslate">\; 100</span>}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 3</span>}<span\; class="notranslate">\; )</span>$

In the formula: DTS ₊₆ - the dynamic thermal stability index of semi-coke, the unit is %;

DTS _3-6 , DTS _-3 —— dynamic thermal stability auxiliary index of semi-focus, unit is %;

m——the sum of residual focus masses at all levels, the unit is g;

m+6——residual focus mass with particle size larger than 6mm, unit is g;

m3-6——the residual focus mass with a particle size of 3-6 mm, in g;

m-3——residual focus mass with particle size less than 3mm, unit is g.

6. Carry out a parallel sample experiment according to the above method, and calculate the average value of the two repeated determinations of the residual focus indicators at all levels.

7. Round off the evaluation values of all levels of residual focus indicators to one decimal place according to the data rounding rules stipulated in GB/T483, and report it as the final result.

Specific implementation mode three: dynamic thermal stability determination method of briquette

1. From the industrial briquette samples taken in accordance with the regulations of MT/T915, select the briquettes without cracks and basically complete, randomly select about 500g of briquettes (about 10 pieces), and weigh the quasi-quality to 0.01g.

2. Put the molded coal sample into the drum 6, and connect the drum 6 with the rotating shaft 11. Close the intake pipe 4 and the exhaust pipe 5 to isolate the air, and quickly send the drum 6 into the constant temperature zone of the heating furnace 12 that has been heated to 900 °C in advance. into the drum, and the gas is discharged from the exhaust pipe 5 through the thick coal seam.) Turn on the rotary switch, set the speed at 50r/min, and adjust the furnace temperature to (850±15)°C, so that the briquette sample is at this temperature Turn for 30min. When the briquette sample is just sent into the heating furnace 12, the furnace temperature may drop, and at this time, it is required to restore the furnace temperature to (850±15) °C within 8 minutes, otherwise the measurement will be invalid.

3. Take out the drum 6 from the heating furnace 12, cool it down to room temperature, weigh the total mass of residual coke (accurate to 0.01g), stack the sieves and sieve trays with apertures of 13 mm and 3 mm on the vibrating screen machine, and then put Pour the weighed residual coke into a 13mm sieve, cover the sieve cover and fix it, start the vibrating sieve machine, and sieve for 5 minutes.

4. Weigh the mass of all levels of residual coke with a particle size greater than 13mm, 3-13mm and less than 3mm after sieving (accurate to 0.01g), add the mass of all levels of residual coke to the total residual coke before sieving Compared with the mass, the difference between the two should not exceed ±1g, otherwise the determination will be invalid.

5. The dynamic thermal stability index and auxiliary index of briquette are calculated according to formula (1)-(2):

${\mathrm{<span\; class="notranslate">\; DTS</span>}}_{<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; 13</span>}}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; m</span>}}_{<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; 13</span>}}}{\mathrm{<span\; class="notranslate">\; m</span>}}<span\; class="notranslate">\; \&times;</span>\mathrm{<span\; class="notranslate">\; 100</span>}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span>$

${\mathrm{<span\; class="notranslate">\; DTS</span>}}_{<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 3</span>}}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; m</span>}}_{<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 3</span>}}}{\mathrm{<span\; class="notranslate">\; m</span>}}<span\; class="notranslate">\; \&times;</span>\mathrm{<span\; class="notranslate">\; 100</span>}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 2</span>}<span\; class="notranslate">\; )</span>$

In the formula: DTS ₊₁₃ - dynamic thermal stability index of briquette, unit is %;

DTS _-3 ——ancillary index of dynamic thermal stability of coal briquettes, unit is %;

m——the sum of residual focus masses at all levels, the unit is g;

m ₊₁₃ - the residual focus mass with a particle size greater than 6 mm, in g;

m _-3 —— residual focus mass of particle size less than 3mm, unit is g.

6. For briquettes with BTS+13≥50, calculate the average value of the two repeated measurement results, round off to one decimal place according to the data rounding rules stipulated in GB/T483; for briquettes with BTS+13<50 Coal is reported in the form of BTS+13<50.

Specific implementation mode four: dynamic thermal stability determination method of coal-based activated carbon

1. Select a suitable test sieve (the columnar activated carbon with a nominal value not less than 2.0mm should use a 1.0mm test sieve, and the columnar and irregular activated carbon with a nominal value of not less than 2.0mm should use a test sieve with a minimum particle size of 1/2 of the aperture of the sieve layer of the product). The dry activated carbon was shaken for 1 min to remove dust.

2. Take a 50mL sample with a measuring cylinder and weigh it to an accuracy of 0.1g, place it in the rotating cylinder 6 with 5 steel balls with a diameter of 14.3mm, and connect the rotating cylinder 6 with the rotating shaft (11). Close the air inlet (4) and the exhaust pipe 5 to isolate the air, and quickly send the drum 6 into the constant temperature zone of the heating furnace 12 that has been heated to the preset temperature. The gas pipe 4 leads into the drum, and the gas passes through the coal seam and is discharged from the exhaust pipe 5.) Turn on the rotary switch (1), set the speed at 50r/min, and make the coal sample rotate at this preset temperature for 5min. When the coal sample is just sent into the heating furnace 12, the furnace temperature may drop. At this time, the furnace temperature is required to return to the preset temperature within 1 minute, otherwise the determination will be invalid.

3. Take out the drum 6 from the heating furnace 12, cool to room temperature, take out the steel balls, move the sample to the selected test sieve, cover the sieve cover and fix it, start the vibrating sieve machine, and sieve for 5 minutes .

4. After the vibrating sieve is completed, collect the samples on the sieve layer and embedded in the sieve holes, and weigh them to an accuracy of 0.1g.

5. The dynamic thermal stability index of activated carbon is expressed in mass fraction, and the value is expressed in %, calculated according to formula (1):

$\mathrm{<span\; class="notranslate">\; DTS</span>}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; m</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}}{\mathrm{<span\; class="notranslate">\; m</span>}}<span\; class="notranslate">\; \&times;</span>\mathrm{<span\; class="notranslate">\; 100</span>}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span>$

In the formula: m ₁ - the mass of the sample on the sieve layer and embedded in the sieve hole, the unit is g;

m - the total mass of the sample, in g;

6. Carry out a parallel sample experiment according to the above method, and the result is expressed as an arithmetic mean value, and the difference between the two measurement results is not more than 2%.

Wherein, in the above method, gas for quenching can also be introduced through the inlet pipe 4 to investigate the thermal stability performance of the solid particles under the conditions of chilling and different chilling rates. Specifically, in the cooling step of moving the rotating drum 6 out of the heating furnace 12 until it is cooled to room temperature, the solid particles can be naturally cooled in the rotating drum 6, but it is more preferable to pass cold gas into the rotating drum 6 to cool the solid particles. The pellets are chilled while the drum 6 is still rotating, the rate of cooling is controlled by controlling the flow of cold gas and its rate and flow. According to the performance of the solid particles and the test requirements, the cooling rate is preferably controlled at 5°C/min-100°C/min, so as to achieve the purpose of cooling within a reasonable time without cracking the solid particles due to overcooling. Similarly, in the heating step of sending the rotating drum 6 loaded with solid particles into the heating furnace 12 or passing hot gas into the rotating drum 6 for heating, the heating rate is also preferably controlled at 5°C/min-100°C/min .

It should be noted that, for the convenience of description and functional description, the temperature-variable drum mechanism according to the present invention is combined with the device and method for measuring the dynamic thermal stability of solid particles for detailed elaboration. However, those skilled in the art can understand that the variable temperature drum mechanism according to the present invention is not limited to be used in the above-mentioned dynamic thermal stability measurement device of solid particles, but can be extended and applied to other devices that can realize the purpose of the present invention or in the field.

The preferred embodiment of the present invention has been described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the specific details of the above embodiment, within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, These simple modifications all belong to the protection scope of the present invention.

In addition, it should be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way if there is no contradiction. The combination method will not be described separately.

In addition, various combinations of different embodiments of the present invention can also be combined arbitrarily, as long as they do not violate the idea of the present invention, they should also be regarded as the disclosed content of the present invention.

Claims (12)

1. A temperature-variable drum mechanism, characterized in that, the temperature-variable drum mechanism comprises an air intake pipe (4), a rotating drum (6) and a rotating shaft (11), and the rotating drum (6) is installed on the rotating shaft (11) ), one end of the air inlet pipe (4) is used to connect to an air source, and the other end is connected to the inner chamber of the rotating drum (6); The temperature-changing drum mechanism also includes an exhaust pipe (5) and a mounting sleeve (16), the mounting sleeve (16) is fixedly sleeved on the rotating shaft (11), and the rotating drum (6) includes a rotating A cylindrical part (61) and a fixed installation part (62), the rotating cylindrical part (61) is installed on the rotating shaft (11) and connected with the fixed installation part (62), the fixed installation part (62) Installed on the installation sleeve (16), the intake pipe (4) and exhaust pipe (5) are respectively connected to the fixed installation part (62), wherein the rotating cylinder part (61) and the fixed The installation part (62) is formed with an airflow channel communicating from the air intake pipe (4) and the exhaust pipe (5) to the inner chamber of the rotating cylinder part (61). 2. The variable temperature drum mechanism according to claim 1, characterized in that, the airflow channel comprises an air intake ring, an exhaust ring, a top wall air channel and a bottom wall air channel, and the air intake ring and the The exhaust ring is arranged on the first side wall (20) of the rotating cylinder part (61) connected with the fixed installation part (62), and the air passage on the top wall and the air passage on the bottom wall are respectively arranged on the On the top wall and the bottom wall of the rotating cylinder (61) and communicate with the inner chamber of the rotating cylinder (61), the air inlet ring communicates with the air inlet pipe (4), the air passage on the top wall and the inner chamber of the rotating cylinder (61). Bottom wall air channel, the exhaust ring channel communicates with the inner chamber of the rotating cylinder (61) and the exhaust pipe (5). 3. The variable temperature drum mechanism according to claim 2, characterized in that, the first side wall (20) comprises a first ceramic sheet (17), and the first ceramic sheet is embedded in the first side wall ( 20) for filtering gas, and the intake ring and exhaust ring are formed on the first ceramic sheet (17). 4. The variable temperature drum mechanism according to claim 3, characterized in that, the fixed installation part (62) includes a second ceramic sheet (18) for filtering gas, and the second ceramic sheet is embedded in the fixed In the mounting part (62) and attached to the first ceramic sheet (17), the second ceramic sheet (18) is provided with air inlets respectively communicated with the intake ring and the exhaust ring. An interface (A) and an exhaust interface (B), the air intake interface (A) and the exhaust interface (B) are respectively connected to the air intake pipe (4) and the exhaust pipe (5). 5 . The variable temperature drum mechanism according to claim 2 , characterized in that, the first side wall ( 20 ) and the rotating shaft ( 11 ) are fitted with a keyway. 6 . 6. The variable temperature drum mechanism according to claim 2, characterized in that, the first side wall (20) is detachably installed between the top wall and the bottom wall of the rotating drum part (61). 7. The temperature-variable drum mechanism according to claim 2, characterized in that grooves are formed on the second side wall (22) of the drum (6) opposite to the first side wall (20) . 8. The variable temperature drum mechanism according to claim 1, characterized in that, the air inlet pipe (4), the drum (6) and the rotating shaft (11) are coaxially arranged, and the rotating shaft (11) is connected to the One side wall of the drum (6) to drive the drum (6) to rotate, and the air inlet pipe (4) is connected to the other side wall of the drum (6). 9. The temperature-variable drum mechanism according to claim 8, characterized in that, the air intake pipe (4) is connected to the side wall of the drum (6) through rolling bearings. 10. The temperature-variable drum mechanism according to claim 8, characterized in that, an exhaust pipe (5) is nested in the air intake pipe (4), and the gap between the air intake pipe (4) and the exhaust pipe (5) An annular channel is formed between them, the exhaust pipe (5) extends into the inner chamber of the drum (6), and an air flow channel is formed in the side wall and the peripheral wall of the drum (6). The channel communicates the annular channel with the inner chamber of the drum (6). 11. The temperature-variable drum mechanism according to claim 8, characterized in that the temperature-variable drum mechanism comprises an exhaust pipe (5), the rotating shaft (11) is a hollow shaft, and the exhaust pipe (5) is set It is inside the rotating shaft (11) and extends into the inner chamber of the drum (6). 12. The temperature-variable drum mechanism according to any one of claims 1-11, characterized in that the temperature-variable drum mechanism comprises a rotating motor (8), and a first gear (9) is provided on the rotating shaft (11) ), the output shaft of the rotating electrical machine (8) is provided with a second gear (10), and an external meshing transmission is formed between the first gear (9) and the second gear (10).