KR102090434B1 - System for spontaneous combustion monitoring and prevention of enclosed coal shed and method their of - Google Patents

Abstract

The present invention relates to a system for monitoring and preventing spontaneous combustion in a closed indoor coal yard, capable of suppressing an increase in the temperature of a coal pile and preventing spontaneous combustion, and a method thereof. The method of the present invention comprises: a first step of monitoring the temperature of coal; a second step of collecting data on the temperature of coal; a third step of analyzing whether the temperature of coal exceeds a spontaneous combustion temperature set value based on the data on the temperature of coal; and a fourth step of transmitting the data on the temperature of coal and the spontaneous combustion temperature set value to an inert gas generation and injection device (200) if the temperature of coal exceeds the spontaneous combustion temperature set value based on the data on the temperature of coal.

Description

System for spontaneous combustion monitoring and prevention of enclosed coal shed and method their of}

The present invention relates to a system for monitoring and preventing spontaneous indoor low carbon spontaneous combustion, and more specifically, monitoring the temperature of coal in real time through a coal temperature monitoring sensor installed in the sealed indoor low carbon to monitor the temperature of coal above a preset temperature (second Boundary temperature, spontaneous ignition management temperature (50 to 60 ℃) is sent from the server to the control panel, and the control panel issues a command to the nitrogen generator panel to control the inert gas nitrogen gas (N ₂ ) discharge line control valve. By automatically opening and closing the signal, the temperature rise due to spontaneous ignition of the cell in the closed indoor low carbon storage is suppressed and the oxidation reaction is blocked to provide a stable operating system for the closed indoor low carbon storage as well as systematic coal temperature monitoring. Enclosed indoor bottom to block the oxidation reaction of coal and suppress spontaneous combustion Chapter relates to spontaneous combustion monitoring and prevention methods and systems.

In general, various types of raw materials are used as raw materials for power plants depending on conditions. Among the raw materials, LNG in the case of combined cycle power, coal in the case of coal-fired power, and radioisotope in the case of nuclear power are listed. However, considering the purchasing cost and supply amount of raw materials among these raw materials, the import of coal is increasing every year as the proportion of coal-fired power plants increases as a basis of power for fuel for coal-fired power plants worldwide, and spontaneous combustion and clinker occur. The proportion of low-grade coal, which has many problems, and the import volume are also increasing significantly, and it is not being produced in Korea.

On the other hand, coal used for power generation may refer to anthracite coal, bituminous coal, bituminous coal, but anthracite has a low content of volatile matter, so there is little possibility of spontaneous combustion, and bituminous coal has a high content of volatile matter. During long-term storage, there is a high possibility of spontaneous combustion, and bituminous coal (Lignite) has a high possibility of spontaneous combustion. The probability of spontaneous ignition is high and the judgment of the low degree is 10 to 15% of moisture content (preferably 12% or more), and the more volatile content, the more severe the spontaneous ignition phenomenon, and more specifically, the spontaneous ignition phenomenon within 40%. It is reported to be severe. When the frequency of spontaneous ignition of coal is represented, it is as shown in Equation 1 below.

That is, since the classification of coal according to volatile matter and moisture content, the selection of raw materials for use is closely related to the economical aspect, so the selection of raw materials for use is a situation in which low-grade coal is frequently used. Therefore, spontaneous ignition of indoor low-carbon coal in domestic coal-fired power plants occurs frequently. Therefore, spontaneous ignition monitoring is paramount. Monitoring of spontaneous ignition is as follows: First, the method of visually checking (step of spontaneous ignition) is as shown in Table 1 below, and second, the method of checking through the sensor (the phenomenon of spontaneous ignition by device) is divided as shown in Table 2 below. do.

step phenomenon First step The smell of mold Stage 2 Sweet smell Stage 3 Weak oily odor 4th step Oil smell 5th step Pale water vapor 6th step Pale smoke Step 7 Ignition

Device name phenomenon result IR Camera Color coded Red temperature Senser Temperature measurement Measurement temperature Gas Detector Gas concentration measurement CO concentration

As mentioned in Tables 1 and 2, spontaneous ignition proceeds spontaneously even if only one of the phenomena in Table 1 is confirmed or one of Table 2. In particular, if the concentration of CO is more than 0.001% (10 ppm), it should be suspected of spontaneous ignition. If the concentration of CO is more than 0.002% (20 ppm), it is clear that spontaneous ignition is in progress. More specifically, the phenomenon of spontaneous ignition is as follows.

First, when the temperature in the center of the coal reaches 40 to 50 ° C, the boundary temperature, 80 to 100 ° C is considered as a dangerous temperature, and 200 to 300 ° C is considered as an ignition temperature.

Second, gas generated in low carbon is a sign of spontaneous ignition when CO and C ₂ H ₄ are contained.

Third, if CO is detected by more than 0.001%, it is evidence that spontaneous combustion is in progress.

Fourth, spontaneous ignition is in progress when the oil smells.

Fifth, due to spontaneous ignition, the calorific value of coal is decreased, ash is increased, and white smoke is generated simultaneously in all of the accumulated coal.

If these phenomena appear, it is okay to judge that spontaneous ignition is in progress. As a fundamental cause of these, coal spontaneously ignites when it comes into contact with oxides and air, and it is possible to accelerate spontaneous ignition among impurities contained in coal. Volatile substances, carbon, moisture, iron oxide, and the like are listed. When the spontaneous ignition phenomenon due to these impurities is described in detail, phenomena such as 2 to 4 in the following mathematics occur.

The above mechanism entails an exothermic reaction up to about 300 ° C. when SO ₂ is generated while sulfur is in contact with oxygen and reacts with moisture again to produce sulfuric acid.

In the case of volatile powder, the more volatile powder is, the more the spontaneous ignition phenomenon occurs. According to objective experiments, spontaneous ignition occurred within 40%. In the case of volatile components, a reaction equation in which spontaneous ignition occurs is shown in Equation 5 below.

In the case of moisture, if there is a lot of moisture, the cooling effect and the air flow are blocked, and spontaneous ignition does not occur. In addition, when the coal is dried, moisture evaporates. However, when moisture absorption and drying are repeated, the flow of air (infiltration of oxygen) becomes severe and spontaneous ignition occurs due to weathering. According to the experiment, spontaneous ignition does not occur at 15% or more, and spontaneous ignition occurs well when contained in the range of 10 to 15%, especially 12% of moisture. In addition, if there are many coal powders in the coal, the surface area becomes large and the contact area with oxygen increases, so spontaneous ignition occurs well. Because these phenomena work in combination, it is not easy to identify the cause of spontaneous ignition. The results for impurities contained in coal are shown in Table 3 (impurity analysis results in coal).

ingredient Design Coal Used Coal Remark Total Moisture (%) 35.74 43.01 Total Sulfur (%) 0.1 0.15 Air Dried Basis Fe ₂ O ₃ (%) 13.06 24.25 Dry Basis Volatile Matter (%) 33.09 43.05 Air Dried Basis Oxygen (%) 12.8 23.2 Dry Basis

Conventional measures to prevent spontaneous combustion of indoor low-coal coal piles are prevented by conventional methods, and firstly, in detail, the height of the coal piles is low and low when low-carbon. Second, the low-coal coal is immediately crushed to block the influx of oxygen in advance, and if necessary, compact it every 3 m. Third, it removes naturally ignitable substances (paper, wood, other foreign substances, etc.) in the low carbon. Fourth, the coal consumption is reduced according to the order of import. Fifth, the water spray to prevent dust is minimized as much as possible. Sixth, a thermal conductor is installed inside the coal pile to reinforce it for monitoring at all times.

In addition, as a countermeasure for preventing spontaneous ignition of a conventional indoor low-coal coal pile, it may be as shown in Table 4 below (prevention measures for each coal pile rising temperature).

division Temperature (℃) Preventive measures First boundary temperature 40 ~ 50 -Evidence of the number of temperature checks (observing the state of temperature change)
-Low-carbon surface is crushed with Dozer Second boundary temperature 50 ~ 60 -Order for low carbon acid
-Low Carbon Surface Compression (Dozer)
-Increasing the number of temperature checks (observing the temperature change)
-First line fire 1st dangerous temperature 60 ~ 80 -Order for low carbon acid
-Low Carbon Surface Compression (Dozer)
-First line fire
-Observation of temperature change 2nd dangerous temperature 80 or more -First line fire
-Transfer to another location
-Large orders for low carbon
-Surface compression to low carbon (Dozer)
-Watch out for examples of temperature changes

As described above, in the event of spontaneous ignition, a countermeasure is taken as a management plan for sealed indoor low carbon, but the underlying solution has not been solved. Existing sealed indoor low carbon inevitable enormous economic losses such as coal loss, conveyor damage, power generation stop loss and repair work due to frequent spontaneous ignition. In order to minimize this, the situation is responding in a conventional way. When spontaneous ignition occurs as described above, first, the contact with oxygen is minimized by performing excavation and crushing using heavy equipment, and second, by spraying a wetting agent, water spray and polymer curing agent, etc. It is common to manage low-coal coal piles, and there is an urgent need to secure and solve the technology.

As a countermeasure against spontaneous combustion of indoor low carbon, the conventional patent “10-0638336” automatically monitors the surface temperature of the coal pile to automatically prevent spontaneous ignition inside. A method for reducing the possibility of ignition has been disclosed. This patent is to monitor the possibility of spontaneous ignition and the atmosphere of the coal pile by converting a video signal to a temperature signal in real time by installing an infrared camera at each location of the coal pile. This is not possible in a system that monitors the temperature of the rising coals, as there is no countermeasures proposed when spontaneous ignition occurs in the coal pile.

"Republic of Korea Patent Publication No. 10-2017-0067015" prevents spontaneous ignition in advance by repressing or blocking the supply of oxygen from coal stored in low carbon and prevents natural ignition in indoor low carbon that can be extinguished by spraying a flame retardant during spontaneous combustion. And a method of reducing the possibility of spontaneous ignition by providing an evolution system. The spontaneous ignition is also a very important part of the height of the coal pile, and this patent can be seen as a solution to easily prevent the surface of the coal pile, but to prevent the fire of the internal source.

In "Republic of Korea Patent No. 10-1118323", when storing coal in a low-carbon coal, an oxidation reaction occurs while contacting oxygen in the air as the storage period increases, and various types of gases, namely C ₂ H ₄ , CO, CH ₄ , NO _x , SO _x, etc. may occur. In other words, "Registration Patent No. 10-1118323" measures the concentration of CO gas when spontaneous ignition is in progress and provides an early warning on whether coal is spontaneously fired, so that the operator ensures sufficient response time before proceeding to fire. Thus, a method for preventing spontaneous ignition is described. In general, among the methods for recognizing spontaneous combustion, the CO gas concentration of Table 2, referred to as a verification method by a device, is measured. When the CO gas concentration is detected at 0.001% (10 ppm) or more, the possibility of spontaneous combustion can be determined . Since this concentration is a concentration that can be attributed to a measurement error range of a gas detector or a gas analyzer, it is difficult to predict a situation in which spontaneous ignition occurs only by measuring the CO concentration. In addition, even if natural ignition is predicted in advance by measuring CO concentration, it is judged that it will be difficult to provide a perfect solution by preventing the fire by applying the countermeasure by the conventional method.

"Republic of Korea Patent No. 10-1413290" is an improved patent to measure the internal temperature of coal. It is equipped with a sensor unit for measuring the internal temperature to effectively monitor the internal temperature to prevent low-carbon fires due to coal deterioration. It describes a system and method for monitoring spontaneous combustion of indoor low carbon. In other words, in "Registration Patent No. 10-1413290", it is not possible to check the convenience of low-carbon operation, but it is easy to predict the possibility of spontaneous ignition by monitoring the internal temperature of coal, but it seems that there are some shortcomings as a countermeasure to solve the fire do. That is, it is judged that the perfect solution should be improved urgently, as there is no mention of whether the process of spontaneous ignition is delayed or the storage period is increased as a solution.

"Republic of Korea Patent Registration No. 10-2000172" describes the proper effect on the system for preventing natural ignition of indoor low carbon. In other words, although it is a technology that drastically increases the storage period of coal by delaying the temperature rise of coal by spraying N ₂ gas on the indoor low-carbon floor, it measures the internal temperature of the coal pile due to obstacles with the coal-fired equipment and telescopic chute. If it does not, spontaneous ignition occurs within the coal, it has the disadvantage that it is difficult to respond effectively.

Republic of Korea Patent Publication Publication No. 10-2017-0067015 "PREVENTING IGNITION AND FIRE EXTINGUISHING SYSTEM IN INSIDE OF PILE OF COAL" Republic of Korea Registration No. 10-1118323 "Coal ignition early warning system (COAL COMBUSTION EARLY WARNING SYSTEM)" Republic of Korea Registration Publication No. 10-1413290 "Low Carbon Natural Fire Monitoring System and Method (YARD COAL FIRE PROTECTION AND TEMPERATURE MONITORING SYSTEM)" Republic of Korea Registered Publication No. 10-2000172 "System to prevent spontaneous combustion in coal shed"

The present invention is to solve the above problems, a digital type coal pile temperature monitoring sensor capable of monitoring spontaneous ignition inside a closed indoor low carbon cabinet, and an infrared camera converting an image signal into a temperature signal (IR Camera ) And install a gas detector or gas analyzer to predict the possibility of spontaneous ignition from these devices in advance, and input the inactive gas by sending the detected data to the control panel of the inert gas manufacturing facility. The automatic control valve is opened and closed to block the oxidation reaction in the coal pile to suppress the temperature rise of the coal pile, to prevent spontaneous ignition and to prevent fire. It is to provide a low-carbon spontaneous monitoring and prevention system.

However, the objects of the present invention are not limited to those mentioned above, and other objects not mentioned will be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, a method for monitoring and preventing spontaneous indoor low carbon spontaneous ignition for blocking oxidation of coal and suppressing spontaneous ignition according to an embodiment of the present invention,

A first step of initiating monitoring of the temperature of the coal stored in the sealed indoor low-carbon cabinet 101 corresponding to the control panel 10 of the sealed indoor low-carbon cabinet 100; A second step in which the coal temperature monitoring system 100 collects coal temperature data of each indoor low-carbon field 100; A third step of analyzing whether the coal temperature data exceeds the natural ignition temperature set value in the second step after the coal temperature monitoring system 100 confirms the natural ignition temperature set value; And if the coal temperature data exceeds the spontaneous ignition temperature set value, the coal temperature monitoring system 100 is coal temperature data to the inert gas generation and injection device 200 through the control panel 10 of the closed indoor low-carbon 101 And a fourth step of transmitting a spontaneous ignition temperature set value. It characterized in that it comprises a.

In one embodiment of the present invention, after the fourth step, the inert gas generation and injection device 200 sets the nitrogen gas (N ₂ ) generator package to ON (N ₂ Generator Package On) for generating inert gas The fifth step; Characterized in that it further comprises.

In addition, in an embodiment of the present invention, after the fifth step, the purity of nitrogen gas, which is an inert gas generated by the inert gas generation and injection device 200, is 99% or more (N ₂ Purity, 99% Approached). The sixth step of analyzing whether or not; Characterized in that it further comprises.

In addition, in one embodiment of the present invention, after the sixth step, when the purity of the inert gas generation and injection device 200 is 99% or more of the inert gas nitrogen gas, the cell control valve discharges the inert gas ( Discharge) a seventh step of controlling the opening (Cell Control V / V Open) for the automatic valve (290); Characterized in that it further comprises.

In addition, in order to achieve the above object, a closed indoor low carbon spontaneous ignition monitoring and prevention system for blocking oxidation reaction and suppressing spontaneous ignition of coal according to another embodiment of the present invention,

A plurality of closed indoor low storage tanks 101 provided with a control panel 10 to start monitoring the temperature of coal stored in the closed indoor low storage space 101 corresponding to its own cell by the control panel 10; A coal temperature monitoring system 100 that collects coal temperature data of each indoor low-carbon field 100; And if the coal temperature data of the closed indoor low carbon 101 detected by the coal temperature monitoring system 100 exceeds a set value of spontaneous ignition temperature, the closed indoor low carbon 101 from the coal temperature monitoring system 100 An inert gas generation and injection device 200 that receives temperature data and a spontaneous ignition temperature set value through the control panel 10 and performs coal temperature data below a spontaneous ignition temperature set value; It characterized in that it comprises a.

In one embodiment of the present invention, the inert gas generation and injection device 200 is characterized in that the nitrogen gas (N ₂ ) generator package is set to on (N ₂ Generator Package On) for generating inert gas.

In addition, in one embodiment of the present invention, the inert gas generation and injection device 200 analyzes whether the purity of the generated inert gas, nitrogen gas, is 99% or more (N ₂ Purity, 99% Approached) It is characterized by.

In addition, in one embodiment of the present invention, the inert gas generation and injection device 200, when the purity of the inert gas nitrogen gas is 99% or more, the cell control valve, the inert gas discharge (Discharge) automatic valve ( 290) is characterized by controlling the open (Cell Control V / V Open).

In addition, in one embodiment of the present invention, the coal temperature monitoring system 100 analyzes whether or not the coal management temperature is set, and if the coal management temperature setting is not performed, after performing the coal management temperature setting, each sealed indoor It is characterized in that the coal temperature stored in the sealed indoor low carbon 101 corresponding to each cell provided in the low carbon spontaneous ignition monitoring and prevention system 1 is returned to the process of performing monitoring.

The closed indoor low carbon spontaneous ignition monitoring and prevention system according to an embodiment of the present invention is a digital type coal pile temperature monitoring sensor capable of monitoring spontaneous ignition inside a closed indoor low carbon, a video signal converted to a temperature signal An IR camera and a gas detector or gas analyzer are installed to predict the possibility of spontaneous ignition from these devices, and signal the detected data to the control panel of an inert gas manufacturing facility. The automatic control valve is opened and closed to block the oxidation reaction in the coal pile to suppress the temperature rise of the coal pile and prevent spontaneous ignition and prevent fire. It is effective to prevent.

In addition, in the closed indoor low carbon spontaneous ignition monitoring and prevention system according to another embodiment of the present invention, the temperature rise of the coal pile can be limited to 0.7 to 0.8 ° C compared to 2 to 3 ° C / day. It can be expected to increase the inhibitory effect by more than about 373%.

1 is a cross-sectional view illustrating the configuration of a closed indoor low carbon 101 among the closed indoor low carbon spontaneous ignition monitoring and prevention system 1 according to an embodiment of the present invention.
2 is a view showing the components of the inert gas generation and injection device 200 constituting the closed indoor low carbon spontaneous ignition monitoring and prevention system 1 according to an embodiment of the present invention.
3 is a view showing a coal temperature monitoring system 100 constituting a closed indoor low carbon spontaneous ignition monitoring and prevention system 1 according to an embodiment of the present invention.
4 is a graph for explaining the performance of the closed indoor low carbon spontaneous ignition monitoring and prevention system 1 according to an embodiment of the present invention.
5 is a flowchart illustrating a method for monitoring and preventing spontaneous indoor low carbon spontaneous combustion according to an embodiment of the present invention.

Hereinafter, a detailed description of a preferred embodiment of the present invention will be described with reference to the accompanying drawings. In the following description of the present invention, when it is determined that a detailed description of related known functions or configurations may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted.

In the present specification, when any one component 'transmits' data or a signal to another component, the component may directly transmit the data or signal to another component, and the data may be transmitted through at least one other component. Or it means that the signal can be transmitted to other components.

1 is a cross-sectional view illustrating the configuration of a closed indoor low carbon 101 among the closed indoor low carbon spontaneous ignition monitoring and prevention system 1 according to an embodiment of the present invention. 2 is a view showing the components of the inert gas generation and injection device 200 constituting the closed indoor low carbon spontaneous ignition monitoring and prevention system 1 according to an embodiment of the present invention. 3 is a view showing a coal temperature monitoring system 100 constituting a closed indoor low carbon spontaneous ignition monitoring and prevention system 1 according to an embodiment of the present invention. 4 is a graph for explaining the performance of the closed indoor low carbon spontaneous ignition monitoring and prevention system 1 according to an embodiment of the present invention. 5 is a flowchart illustrating a method for monitoring and preventing spontaneous indoor low carbon spontaneous combustion according to an embodiment of the present invention.

First, referring to FIGS. 1 to 3, the closed indoor low carbon spontaneous ignition monitoring and prevention system 1 includes a sealed indoor low carbon 101 (FIG. 1) in which a control panel 10 is formed on top, a coal temperature monitoring system ( 100) (FIG. 3) and an inert gas generation and injection device 200 (FIG. 2).

Here, the closed indoor low carbon spontaneous ignition monitoring and prevention system 1 includes a coal temperature monitoring system 100 and infrared for monitoring the surface and internal temperature of the coal pile 104 loaded on the upper surface of the closed indoor low carbon 101. In addition to including a camera (IR Camera) 105, it may further include a CO detector (or analyzer) 106 and an O ₂ detector (or analyzer) 107.

Accordingly, the inert gas may be supplied from the inert gas generation and injection device 200 to the coal pile 104 formed on the bottom of the floor from the outside of the sealed indoor low-carbon cabinet 101, and for this purpose, a plurality of cell structures It is preferable that the injection pipe is configured between the sealed indoor low-carbon cabinet 101 and one inert gas generation and injection device 200. Here, the CO detector (or analyzer) 106 detects (or analyzes) CO (Carbon monoxide) for measuring whether or not coal spontaneous ignition progresses in the sealed indoor low carbon 101 and provides it to the control panel 10. . The control panel 10 should suspect spontaneous ignition when the CO concentration measured by the CO detector (or analyzer) 106 becomes 0.001% (10 ppm) or higher, and when the CO concentration becomes 0.002% (20 ppm) or higher. It can be judged that spontaneous ignition is in progress. On the other hand, since the O ₂ detector (or analyzer) 107 frequently generates spontaneous ignition when coal is in contact with oxide and air, when the O ₂ concentration measured in the sealed indoor low carbon 101 is greater than or equal to a preset critical O ₂ concentration, It can be formed for analysis as a risk of spontaneous combustion.

As a result of measuring in a sensing device formed in a sealed indoor low-carbon cabinet 101 having such a configuration, and a temperature measurement result by the coal temperature monitoring system 100 having a configuration as shown in FIG. 3 to be described later, the coal management temperature is 50 to 60 ° C. When the degree is reached, an inert gas discharge automatic valve formed in the injection pipe connected between the sealed indoor low carbon 101 and the active gas generation and injection device 200 through control by the control panel 10 corresponding to the main control system The nitrogen gas (N ₂ ), which is an inert gas, may be supplied to the closed indoor low carbon 101 through the control of 290.

The coal pile 104 stored in the sealed indoor low-carbon cabinet 101 is provided with nitrogen gas (N ₂ ), which is an inert gas supplied through an injection pipe while natural ignition is in progress, thereby suppressing the oxidation reaction of coal and its active point (Active site).

Structurally sealed indoor low-carbon cabinet 101 is loaded with coal, the coal pile 104 is stored, may be formed in a closed form by the partition wall 103 corresponding to the cover, and a coal pile composed of at least three or more walls (104) It is desirable to form a storage space.

Here, the central wall 102 is between the lower surface of the sealed indoor storage tank 101 and the partition wall 103 when the coal pile 104 stored in the sealed indoor storage cabinet 101 is stored and stored through the partition wall 103. It can be located in the center with respect to the located coal, so that the coal pile 104 can be divided and stored in both directions.

On the other hand, an infrared camera (IR Camera, 105) is formed on the bottom of the ceiling surface of the sealed indoor low-carbon cabinet 101, the CO detector (or analyzer) 106 is the edge between the upper horizontal surface and the inclined slope of the partition wall 103 It is formed between, O ₂ detector (or analyzer) 107 may be formed on the edge of the lower end of the inclined slope of the partition wall 103.

Through such a structure, spontaneous ignition has various causes, but important factors can be applied to each cell corresponding to each sealed indoor low carbon 101.

Next, referring to FIG. 3, the coal temperature monitoring system 100 is junk in addition to the optical sensor module 120 formed on at least three wall surfaces of the sealed indoor low carbon 101 corresponding to each cell of the sealed indoor low carbon 101 Box (Junction Box) 130, fiber distribution frame (FDF) 140, light irradiation and data handling (Data Handling) device 150, multi-channel (Multi Channel) configuration hub 160, server ( 170), and a rack 180 for storing the server 170.

The coal temperature monitoring system 100 not only performs motor monitoring for each sealed indoor low-carbon cabinet 101 of a cell type in real time, but also communicates when the value of the spontaneous ignition boundary temperature of 50 to 60 ° C is reached. By setting the system and PLC program so that it can be delivered to the control panel 10 constituting the sealed indoor low carbon 101, the system is built to enable systematic and stable management of the sealed indoor low carbon 101.

More specifically, the optical sensor measurement signal is collected by the optical distribution FDF 140 through the junk box 130 connected to the cables of the three optical sensor modules 120, and the optical signal is distributed to the optical distribution FDF 140 for the collected signal. After the optical fiber (Fiber) that is branched to each junk box 130 is safely protected from external influences such as impact, the optical sensor measurement signal formed on the 3 wall surface by the light irradiation and data handling device 150 It is output and can be converted by the light irradiation and data handling device 150 into temperature information for the optical sensor measurement signal. Thereafter, the converted temperature information is transmitted from the light irradiation and data handling device 150 to the server 170 formed on the rack 180 connected to the network through the hub 160 for multi-channel configuration, and transmitted to the database. Can be stored in.

Through such a configuration, when exposed to light by the optical sensor module 120, the property of the resistance value is changed, and the optical sensor on each wall has a (L × M) lattice form (L, M are two or more natural numbers that are the same or different from each other). After the server 170 adds the signal output value according to the value exposed to the light collected by each optical sensor by the optical sensor module 120 formed by), it is set in advance to match the summed signal output value for each wall surface. By extracting the temperature information on the database, and taking the average value for the three walls with respect to the extracted temperature information, it is possible to obtain a temperature value for the fine coal pile 104.

In an embodiment of the present invention, when the optical sensor module 120 is formed of a single optical sensor or a plurality of optical sensors, the optical sensor module 120 includes a laser light source that generates a continuous wave signal, and the junk box 130 ) Includes a pulse generator for converting a continuous wave signal on a path of an optical fiber connected to a junk box 130 connected to a laser light source formed in the optical sensor module 120 into a pulse wave signal, and the light distribution FDF 140 By measuring the temperature using the Rayleigh backscattering signal generated by the optical fiber to be measured, including the Rayleigh backscattering signal generating a Rayleigh backscattering signal from the pulse wave signal incident on the optical fiber formed between the junk box 130 and the can do.

In another embodiment of the present invention, the optical sensor module 120 can be transformed into a temperature sensor module, extracts preset temperature information matching the summed oxygen output value for the three wall surfaces in the same manner on the database, and extracts the temperature By taking the average value of the three wall surfaces for the information, it is possible to obtain a temperature value for the precise coal pile 104.

Next, referring to FIG. 3, in the case of spontaneous ignition according to an embodiment of the present invention, the configuration of the inert gas generation and injection device 200 to inject inert gas into the cell is a low temperature air separation method As a facility that produces nitrogen gas (N ₂ ), which is an inert gas, it compresses air to provide air receiver tank (220), air compressor (210), and can store compressed air. The air compressor 210 that compresses air to separate and supplies it to the air receiver tank 220, and receives and stores compressed air from the air compressor 210, an air receiver tank 220, and an air receiver Air dryer 230 that provides air to the after cooler 240 by drying the air stored in the tank (Air Receiver Tank) 220, after cooler 240 to lower the dried air below a preset temperature, US Oxygen adsorption towers (250, 251) for adsorbing oxygen from the air lowered below the preset temperature, silencer (260) for lowering noise during adsorption of oxygen in the oxygen adsorption towers (250, 251), nitrogen remaining after adsorption of oxygen in the air Product storage tank 270 for storing gas (N ₂ ), for the nitrogen stored in the product storage tank 270, when the coal in the sealed indoor storage tank 101 exceeds a predetermined temperature, inert gas is discharged to provide nitrogen gas (Discharge) Nitrogen generator control panel 280 for controlling the automatic valve 290, and a plurality of inert gas discharge (Discharge) automatic valve 290 formed in the injection pipe, each of which is introduced into the sealed indoor low carbon 101 By being composed of, when the natural ignition is predicted to be 50 to 60 ° C, which is the natural ignition boundary temperature by the coal temperature monitoring system 100, for the sealed indoor low carbon 101, an inert gas is produced. Theory is a system configured to be driven by a program transmitted to the PLC system in order.

More specifically, the inert gas generation and injection device 200 sprayed on the coal pile 104 of the sealed indoor low-carbon cabinet 101 is a process of drying compressed air to apply inert gas by applying a freeze-drying method or an adsorption-type drying method. In the manufacture, in the adsorption-type drying method, the freeze dryer 230 may be removed.

In addition, the inert gas discharge (Discharge) automatic valve 290 is formed of 0 to 3 m intervals of the injection pipe, which is an inert gas supply pipe formed, more preferably within 0 to 1.5 m, the nozzle of the injection pipe is adjacent injection pipe It is desirable to construct an asymmetric (or zigzag) injection nozzle that is not symmetrical with the nozzle of to effectively discharge the inert gas so that there is no void space.

In addition, the inert gas discharge (Discharge) automatic valve 290 selectively selects the amount of inert gas for displacing oxygen-containing air in the pores for the coal pile 104 of the sealed indoor low-carbon storage 101 in which the inert gas is injected. PID control type automatic control valve is possible.

Through this configuration, by applying the temperature monitoring system of the coal pile (Coal Pile) 104 on the three walls of the sealed indoor low-carbon cabinet 101, real-time monitoring of the surface temperature of the coal pile 104 is possible. , The upper end of the dispersion pipe corresponding to the buried type inert gas supply pipe formed at the bottom of the sealed indoor low-carbon cabinet 101 may include a filling material having a predetermined size so that the inert gas is well dispersed.

On the other hand, the nitrogen generator control panel 280, the temperature of each closed-type open-bottomed gas tank 101 is preset to the inert gas discharge (automatic) valve 290 formed on the injection pipe connected to each closed-type indoor low-carbon tank 101. When rising above, it can be individually controlled to selectively supply nitrogen gas, which is an inert gas.

At this time, the purity of the inert gas should be at least 99% to be sprayed on the sealed indoor low carbon 101, and it takes about 10 to 20 minutes to reach this value.

In addition, when 99% or more of inert gas is generated by normal operation, the system may be configured to be stored in the product storage tank 270 and sequentially discharged and adsorbed oxygen at the same time according to the pressure of the product storage tank 270.

In addition, Figure 5 is an overall flow chart showing a driving method of the closed indoor low carbon spontaneous combustion monitoring and prevention system 1 according to an embodiment of the present invention. Referring to FIG. 5, the coal temperature monitoring system 100 controls the enclosed indoor low carbon 100 on the closed indoor low carbon spontaneous ignition monitoring and prevention system 1, and the control panel 10 of the closed indoor low carbon 100 has a closed indoor low carbon corresponding to its own cell. Monitoring the coal temperature stored in (101) is started (S11).

After the step (S11), the coal temperature monitoring system 100 may collect the coal temperature data of each indoor low-carbon field 100 through the configuration as shown in FIG. 3 (S12) (the configuration of FIG. 3 and the principle of operation of each configuration) Reference).

After the step S12, the coal temperature monitoring system 100 determines whether or not the coal management temperature is set (S13).

If the coal management temperature setting is not performed as a result of the determination in step S13, the coal temperature monitoring system 100 returns to step S11 after performing the coal management temperature setting, and conversely, the determination result in step S13 When the coal management temperature setting is performed, the coal temperature data is checked (S14).

After checking the coal temperature data of step S14, the coal temperature monitoring system 100 checks the spontaneous ignition temperature set value, and then determines whether the coal temperature data checked at step S14 exceeds the spontaneous ignition temperature set value. It is judged (S15).

As a result of the determination in step S15, if the coal temperature data identified in step S14 does not exceed the spontaneous ignition temperature set value, the coal temperature monitoring system 100 returns to step S11 to return to step S11 to step S11 to step ( The process of S15) is repeatedly performed until the coal temperature data identified in step S14 exceeds the spontaneous ignition temperature set value.

Conversely, when the result of the determination in step S15 determines that the coal temperature data identified in step S14 exceeds the spontaneous ignition temperature set value, the coal temperature monitoring system 100 controls the control panel 10 of the sealed indoor low carbon 101. Coal temperature data and spontaneous ignition temperature set value are transmitted (S16).

After the step (S16), the control panel 10 of the sealed indoor low carbon 101 is nitrogen gas (N ₂ ) for the inert gas generation and injection device 200 The generator package is set to ON (N ₂ Generator Package On) (S17).

After the step S17, the inert gas generation and injection device 200 determines whether the purity of the inert gas nitrogen gas is 99% or more (N ₂ Purity, 99% Approached) (S18).

As a result of the determination in step S18, the inert gas generation and injection device 200 waits until the purity of the nitrogen gas which is the active gas is 99% or more when the purity of the nitrogen gas that is the inert gas is not 99% or more, and vice versa. As a result of the determination in step S18, when the inert gas generation and injection device 200 has a purity of inert gas of nitrogen gas of 99% or more, the cell control valve for the inert gas discharge automatic valve 290 It controls open (Cell Control V / V Open) (S19).

After the step (S19), the inert gas generation and injection device 200 sprays nitrogen gas (N ₂ ) with a sealed indoor low carbon 101 (N2 Gas Spray) (S20).

After the step (S20), the coal temperature monitoring system 100 checks the coal temperature for the sealed indoor low carbon 101 again after spraying nitrogen gas (N2) by the inert gas generation and injection device 200 (Coal Temperature) Confirm), if the result does not exceed the spontaneous ignition temperature set value, the process is terminated. On the contrary, if the spontaneous ignition temperature set value is exceeded, the process returns to step S16 and the process of steps S16 to S21 is repeated. It can be performed (S21).

That is, when the coal becomes low carbon in the sealed indoor low-carbon cabinet 101 and the temperature monitoring program of the coal pile 104 of FIG. 1 is activated and the temperature of coal rises above the boundary temperature, the server of the coal temperature monitoring system 100 In (170), it is delivered to the main panel and transferred to the control unit of the inert gas generation and injection device 200, so that the preliminary operation is performed so that the purity of the inert gas is 99% or more. It is an important result of the present invention, which proposed a system for preventing and controlling spontaneous ignition and a stable sealed indoor low carbon spontaneous ignition, so that an inert gas is supplied to a corresponding cell.

In particular, the closed indoor low carbon spontaneous ignition monitoring and prevention system and solution according to the present invention has a temperature increase of the coal pile as compared to the existing 2 to 3 ° C / day, as confirmed in the performance results of FIG. The effect was limited to about 373% or more.

As a result, it is seen as the first solution as a solution to prevent spontaneous ignition of the sealed indoor low carbon 101, and an important factor that suppresses the temperature rise of coal is the active point of the coal surface as moisture in the coal evaporates in a natural state. It is increased and promotes the oxidation reaction, and it was confirmed that the oxidative reaction of the active site is effectively blocked or suppressed through the technology proposed in the present invention to prevent spontaneous ignition.

In addition, while the standard coal storage period is 14 to 17 days, the storage period of coal can be over 70 days through the present invention, and it is possible to stably manage the sealed indoor low carbon 101 by avoiding spontaneous combustion and due to spontaneous combustion. The power plant's service was not only greatly improved, but also greatly facilitated.

Therefore, it is possible to exert excellent effects in enormous economic loss due to spontaneous ignition of the existing closed indoor low carbon, improving the working environment, solving complaints caused by harmful gases, and operating and managing as a stable workplace.

The present invention can also be embodied as computer readable codes on a computer readable recording medium. The computer-readable recording medium includes all types of recording devices in which data readable by a computer system are stored.

Examples of computer-readable recording media include ROM, RAM, CD-ROM, magnetic tapes, floppy disks, optical data storage devices, etc., which are also implemented in the form of carrier waves (for example, transmission over the Internet). It also includes.

The computer-readable recording medium can also be distributed over network coupled computer systems so that the computer readable code is stored and executed in a distributed fashion. In addition, functional programs, codes, and code segments for implementing the present invention can be easily inferred by programmers in the technical field to which the present invention pertains.

As described above, in the present specification and drawings, preferred embodiments of the present invention have been disclosed, and although specific terms are used, they are merely used in a general sense to easily describe the technical contents of the present invention and to help understand the invention. , It is not intended to limit the scope of the present invention. It is apparent to those skilled in the art to which the present invention pertains that other modified examples based on the technical idea of the present invention can be implemented in addition to the embodiments disclosed herein.

1: Closed indoor low carbon spontaneous fire monitoring and prevention system
10: Control panel
100: coal temperature monitoring system
101: sealed indoor low-carbon cabinet 103: bulkhead
104: coal pile 105: IR camera
106: CO detector (or analyzer) 107: O ₂ detector (or analyzer)
120: optical sensor module 130: Junk Box (Junction Box)
140: Fiber Distribution Frame (FDF)
150: light irradiation and data handling equipment
160: hub for multi-channel configuration
170: server 180: rack
200: inert gas generation and injection device
210: air compressor 220: air receiver tank
230: air dryer 240: after cooler
250, 251: oxygen adsorption tower 260: silencer
270: product storage tank 280: nitrogen generator control panel
290: automatic valve

Claims (10)

A first step of initiating monitoring of the temperature of the coal stored in the sealed indoor low-carbon cabinet 101 corresponding to the control panel 10 of the sealed indoor low-carbon cabinet 100;
A second step in which the coal temperature monitoring system 100 collects coal temperature data of each indoor low-carbon field 100;
A third step of analyzing whether the coal temperature data exceeds the natural ignition temperature set value in the second step after the coal temperature monitoring system 100 confirms the natural ignition temperature set value;
When the coal temperature data exceeds the spontaneous ignition temperature set value, the coal temperature monitoring system 100 uses the inert gas generation and injection device 200 through the control panel 10 of the enclosed indoor low carbon 101 and the coal temperature data and A fourth step of transmitting a spontaneous ignition temperature setpoint;
A fifth step of setting the inert gas generation and the injection device 200 is a nitrogen gas (N ₂₎ (N ₂ Generator Package On) on the package generator for generating inert gas; And
A sixth step of analyzing whether the purity of nitrogen gas, which is an inert gas generated by the inert gas generation and injection device 200, is 99% or more (N ₂ Purity, 99% Approached);
A method for monitoring and preventing spontaneous indoor low carbon spontaneous combustion to block the oxidation reaction of coal and to suppress spontaneous ignition, comprising a.
delete delete The method according to claim 1, After the sixth step,
When the purity of the inert gas generation and injection device 200 is 99% or more of the inert gas nitrogen gas, the cell control valve, the inert gas discharge (Discharge) to the automatic valve 290 (Cell Control V / V Open) 7) controlling; A closed indoor low carbon spontaneous ignition monitoring and prevention method for blocking the oxidation reaction of coal and suppressing spontaneous ignition, further comprising a.
The method according to claim 1, between the second step and the third step,
The coal temperature monitoring system 100 analyzes whether the coal management temperature is set, and if the coal management temperature setting is not performed, returns to the first step after performing the coal management temperature setting; A closed indoor low carbon spontaneous ignition monitoring and prevention method for blocking the oxidation reaction of coal and suppressing spontaneous ignition, further comprising a.
A plurality of closed indoor low storage tanks 101 provided with a control panel 10 to start monitoring the temperature of coal stored in the closed indoor low storage space 101 corresponding to its own cell by the control panel 10;
A coal temperature monitoring system 100 that collects coal temperature data of each indoor low-carbon field 100; And
For the control of the sealed indoor low carbon 101 from the coal temperature monitoring system 100 when the temperature of the coal temperature of the sealed indoor low carbon 101 detected by the coal temperature monitoring system 100 exceeds a set value of spontaneous ignition temperature An inert gas generation and injection device 200 that receives temperature data and a spontaneous ignition temperature set value through the panel 10 and performs coal temperature data below a spontaneous ignition temperature set value; It includes,
The inert gas generation and injection device 200 is characterized by setting the nitrogen gas (N ₂ ) generator package to ON (N ₂ Generator Package On) for generating inert gas,
The inert gas generation and injection device 200 blocks the oxidation reaction of coal and is characterized in that it analyzes whether the purity of the generated inert gas, nitrogen gas, is 99% or more (N ₂ Purity, 99% Approached). Closed indoor low carbon spontaneous ignition monitoring and prevention system to suppress ignition.
delete delete The method according to claim 6, Inert gas generation and injection device 200,
When the purity of the inert gas nitrogen gas is more than 99%, the cell control valve of the inert gas discharge (Discharge) automatic valve 290 for the control (Cell Control V / V Open) for controlling the coal of Closed indoor low carbon spontaneous ignition monitoring and prevention system to block oxidation reactions and suppress spontaneous ignition.
The method according to claim 6, Coal temperature monitoring system 100,
Analyzing whether the coal management temperature is set, and when the coal management temperature setting is not performed, after performing the coal management temperature setting, the sealed indoors corresponding to each cell provided in each sealed indoor low carbon spontaneous ignition monitoring and prevention system (1) A closed indoor low carbon spontaneous ignition monitoring and prevention system for blocking the oxidation reaction of coal and suppressing spontaneous ignition, characterized by returning the coal temperature stored in the low carbon 101 to a process of performing monitoring.

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