KR20220117864A - System and Method of controlling spontaneous combustion coal at unload process in coal yard - Google Patents

Abstract

Disclosed is a system for controlling spontaneous combustion coal in a coal yard, which is able to fundamentally detect and extinguish fire on coal in a process of unloading the coal with already initiated combustion at a high temperature in an indoor coal yard, store the coal in a stable manner, and fundamentally solve the problem of spontaneous combustion. According to the present invention, the system for controlling the spontaneous combustion coal in the coal yard comprises: a coal discharger of a coal storage unit; a temperature gauge sensing the temperature of the coal unloaded from the coal discharger and generating temperature information; a central control terminal comparing the temperature information with a preset reference value, and generating a spray control command to spray fire-extinguishing solution to the unloaded coal in accordance with the results of comparison; and a spray apparatus spraying the fire-extinguishing solution in accordance with the spray control command.

Description

BACKGROUND ART System and Method of controlling spontaneous combustion coal at unload process in coal yard

The present invention relates to a control technology for spontaneously ignited coal, and more particularly, fundamentally detects and extinguishes coal in the process of unloading coal that has already been ignited at a high temperature in an indoor coal storage, and fundamentally solves the spontaneous ignition phenomenon through stable coal storage and to a control system and method for low-coal mine spontaneously ignited munitions that do not cause additional problems.

Coal is used as a basic raw material for thermal power plants worldwide due to its abundant reserves, low price, and stability of supply. Recently, the proportion of coal-fired power as a power source is increasing due to an increase in electricity demand due to electric vehicles, concerns about the risk of nuclear power generation, and/or a low base expansion of domestic renewable energy generation.

Accordingly, coal imports are increasing, and the import share and import volume of low-rank coal, which has many problems in spontaneous combustion, clinker generation, and composition, is also increasing significantly.

In the case of a 500MW standard coal-fired power plant, fuel coal is usually used after 1 to 3 months of coal storage.

In addition, when constructing a new coal-fired power plant, it is difficult not only to secure land for the construction of a coal-fired coal-fired power plant, but also to construct a new coal-fired coal mine due to friction and civil complaints between nearby residents and environmental groups. In order to solve these problems, the construction of a new coal yard is

Although it is being built as an indoor type, it is not possible to fundamentally prevent the spontaneous ignition problem of low-grade coal even with an indoor type storage yard. many.

In case of spontaneous combustion, major combustion gases such as carbon dioxide (CO ₂ ), carbon monoxide (CO), and water vapor (H ₂ O) and 66 organic compounds such as benzene, toluene, and acetic acid are generated, resulting in deterioration of the surrounding environment and increased odor generation. This is a cause of environmental complaints.

In the case of Korea, which is an energy importing country, heat loss of 1.5 to 5.8% into the air is also acting as a factor in raising the unit cost of power generation. Low Rank Coal (LRC) is divided into grades from peat to brown coal, lignite, sub-bituminous coal, bituminous coal, and anthracite. Bituminous coal is further divided into low volatile matter, medium volatile matter, and high volatile matter bituminous coal, and anthracite is divided into semi-anthracite, anthracite, Meta-anthracite and graphite-based anthracite.

Among them, low-grade coal (LRC) refers to from brown coal to sub-bituminous coal, and is classified from bituminous coal to high-grade coal (Hard Coal; High Rank Coal).

Low-grade sub-bituminous coal has many pores and has many peripheral hydrocarbons (volatiles), so the temperature rises due to the accumulation of heat of adsorption by adsorption and desorption of moisture. Oxidation reaction of group (-COOH) and carbony group (-C=O) raises the temperature inside the pores, which may cause spontaneous ignition.

Spontaneous ignition of coal-fired power plants occurs frequently about 8,000 to 10,000 times a year due to the increase in the use of low-grade coal, and the ignited coal type ratio is reported to be over 56%.

When coal spontaneously ignites, it not only loses heat (loss rate of about 5.8% or less) of the coal itself, but also deteriorates the working environment in the coal yard due to harmful gas and fumes generated during coal ignition, and causes civil complaints in the surrounding area. .

In addition, the risk of large-scale damage to equipment such as fire and dust explosion in the pulverizer system is increasing, which causes combustion failure due to heat loss and in the process of transport using a conveyor belt.

The existing countermeasures against spontaneous combustion can be divided into two main types as follows. The first is a method of blocking contact with moisture or oxygen in the atmosphere by applying/spraying a coating agent or a dusting agent using a cement hardener and a polymer hardener, etc. to a coal pile.

Second, there is a method of adsorbing oil to dry coal at a high temperature, or transforming the surface through compression or molding. However, in the case of the first method, it is difficult to fundamentally block the infiltration of moisture and oxygen, which is easy to be detached from rain or strong wind, and it is also a cause of fine powder and combustion failure when input into the boiler.

In addition, the second method is not very effective in consideration of economic feasibility because too much energy is input to transform the surface reforming of low-grade coal, and there is no case applied to actual coal-fired power plants.

In the existing technology, there is a method of suppressing ignition by installing a sintering filter that is stable even at a temperature of 250℃ in the pressure vessel to remove dust. In addition, there is disclosed a system for preventing fires occurring inside the differentiator in advance by providing the inside of the differentiator so that it can be monitored through a plurality of sensors around the entrance/exit portion of the differentiator. In addition, there is disclosed a method of alarming a fire by monitoring in real time a unique light source wavelength band and a unique temperature color of combustion products (ultraviolet, infrared by heat, flame) generated in a fire by being installed in the pulverizer.

In addition, there is disclosed a disaster prevention system that measures the level of pure oxygen concentration in the differentiator and sets a support signal therefor to sound an alarm in case of danger. In addition, there is disclosed a coal temperature automatic detection system capable of automatically detecting the surface temperature of a pile of coal stored for a long time in a yard to prevent spontaneous combustion therein.

In addition, an infrared camera installed inside the sealed storage to monitor the raw material files loaded in the sealed storage, a gas component detection sensor to detect gas components inside the sealed storage, and a spraying unit that sprays fire extinguishing agent when fire is detected. An apparatus is disclosed.

However, when coal resources are scarce as in Korea, low-grade coal that inevitably ignites and/or fires frequently is imported and used. Accordingly, there is a need for an invention capable of fundamentally preventing spontaneous ignition and/or fire in an indoor coal storage that provides a fatal cause to the working environment such as suffocation due to difficulty in air diffusion.

In particular, recently, coal imported from Southeast Asia occupies a large proportion. When coal-fired power plants are shut down due to special measures against fine dust in the spring, the mined coal is stored in a yard before being loaded onto a carrier. Therefore, spontaneous ignition has already started during the stockpiling process, causing a fire in the transport ship, and the proportion of coal showing a high surface temperature and flame at the time of unloading is increasing.

Already, in the case of coal that has been ignited, spontaneous ignition occurs immediately upon unloading or within one week after unloading, causing various problems. Therefore, there is an urgent need for a method of spontaneous ignition through fire extinguishing in the process of unloading and storing coals that have been basically spontaneously ignited.

In addition, when spontaneous ignition or fire occurs in an indoor coal yard, it is difficult to extinguish the fire with a fire extinguisher such as emulsion or carbon dioxide.

Therefore, in the process of unloading coal that has already been ignited at a high temperature in an indoor coal yard, it fundamentally extinguishes and solves the spontaneous ignition phenomenon through stable coal storage, and effectively prevents spontaneous ignition without causing additional problems like the above methods measures are absolutely necessary.

In addition, conventionally, a method of applying/spraying a coating agent or a dusting agent to the surface of a coal pile is mainly applied as a countermeasure against spontaneous ignition, and a method of additionally modifying the surface modification of coal has been proposed. However, these methods are highly likely to cause problems in coal transport and storage facilities such as conveyor belts, coal silos and pulverizers, and also cause unburned fuel and combustion failure in boiler furnaces.

In addition, the method of modifying the surface of the coal requires too much energy to obtain the effect of preventing spontaneous ignition and requires additional equipment, which has a high cost compared to the effect of preventing spontaneous ignition. The problem is that there are no cases.

1. Korea Patent No. 10-0799294 (Registration Date: January 23, 2008)

The present invention has been proposed to solve the problem according to the above background art, and it is possible to fundamentally detect and digest coal that has already been ignited at a high temperature in an indoor coal storage and to fundamentally solve the spontaneous combustion phenomenon through stable coal storage in the process of loading and unloading. It is an object of the present invention to provide a system and method for controlling munitions in a coal storage pit.

In addition, another object of the present invention is to provide a system and method for controlling low coal field spontaneously ignited munitions that do not cause additional problems.

In order to achieve the above object, the present invention provides a control system for coal storage that can fundamentally extinguish spontaneous combustion through stable coal storage in the process of unloading coal that has already been ignited at a high temperature in an indoor coal storage yard. Its purpose is to provide

The coal storage self-igniting coal control system,

low-carbon coal ejectors;

a temperature measuring meter for generating temperature information by sensing the temperature of the coal dropped from the coal ejector;

a central control terminal comparing the temperature information with a preset reference value and generating a spraying control command to spray the extinguishing liquid on the dropped coal according to the comparison result; and

and a spraying device for spraying the extinguishing liquid according to the spraying control command.

In this case, the spraying device may include: a spray nozzle device having a plurality of spray nozzles capable of angle adjustment; and a driving pump for supplying the extinguishing liquid to the spray nozzle.

In addition, it is characterized in that the arrangement of the thermometer is moved in different directions according to the movement of the coal ejector.

In addition, the injection nozzle device is characterized in that it executes the injection having a slope of 5 to 60 ° upward relative to the ground surface so that the injection pressure can be maintained in the range of 7 to 10 kgf / ㎠.

In addition, the slope is 5 to 20° for spraying from the bottom of the slope to the 1/3 point of the slope based on the ground surface, and the slope is 20 to 40° for injection from the 1/3 point to the 2/3 point of the slope. , in order to spray from the 2/3 point of the slope to the top, it is characterized in that the slope is 40 to 65°.

In addition, the injection nozzle unit is characterized in that it is automatically moved along the central axis of the temperature measuring system.

In addition, the injection nozzle unit, the injection nozzle; an angle adjustment plate for supporting the spray nozzle; a position adjusting ball screw connected to the angle adjusting plate; and a motor for rotating the position adjusting ball screw.

In addition, the driving pump and the motor are characterized in that they operate at the same time.

In addition, the injection device may include: a flow meter for measuring a flow rate of the extinguishing liquid flowing into the injection nozzle; and a pressure gauge for measuring the pressure supplied to the injection nozzle.

In addition, the liquid-to-liquid ratio indicating the ratio of the fire extinguishing liquid and the amount of coal in the lower coal is 0.04 to 0.08 ℓ of fire water/kg hatan coal.

On the other hand, another embodiment of the present invention, (a) generating temperature information by a temperature measuring meter sensing the temperature of the coal dropped from the coal discharger of the coal storage; (b) generating, by the central control terminal, the temperature information and a preset reference value, and generating a spraying control command to spray the extinguishing liquid on the dropped coal according to the comparison result; and (c) the spraying device spraying the extinguishing liquid according to the spraying control command.

On the other hand, another embodiment of the present invention provides a computer-readable storage medium storing a program code for executing the above-described method for controlling a munitions storage spontaneously ignited generated munitions described above.

According to the present invention, coal that has been ignited forms a hard calcium salt film produced by the endothermic and saponification reaction of calcium carbonate at low carbon, while detecting whether the coal is ignited at the source while unloading and has a cooling effect through nozzle tilt adjustment and selective fire extinguishing. By blocking the oxygen contact on the surface of the coal, it is possible to effectively prevent and/or suppress spontaneous combustion.

In addition, calcium salt (Ca-(O-CO-CH ₂ ) ₂ ), a by-product of calcium carbonate, can also obtain effects such as improvement of desulfurization efficiency in furnace and reduction of greenhouse gas emission when burning in a boiler. The realization of a coal-fired power plant is possible.

1 is a structural diagram of an indoor-type coal storage according to an embodiment of the present invention.
Figure 2 is a cross-sectional view of the coal outlet shown in Figure 1;
Figure 3 is a block diagram of the configuration of a coal storage spontaneously ignited generated coal control system according to an embodiment of the present invention.
4 is a flowchart illustrating a control process of a coal storage spontaneously ignited generated coal according to an embodiment of the present invention.
5 is a conceptual diagram illustrating the operation of detecting an ignited bomb, an extinguishing liquid driving pump, and a nozzle according to an embodiment of the present invention.
6 is a block diagram of the central control terminal shown in FIG.
7 is a three-dimensional view of an indoor coal storage structure and ignition temperature sensing according to an embodiment of the present invention.
8 is a conceptual diagram for detecting the ignition temperature of an indoor coal storage unit and nozzle injection according to an embodiment of the present invention.
9 is a graph showing the temperature change of the fire extinguishing coal according to the pressure of the fire extinguishing agent injection nozzle according to an embodiment of the present invention.
10 is a graph showing the relationship between the temperature and the natural heat index according to an embodiment of the present invention.
11 is a graph showing the change in the liquid-to-liquid ratio of the fire extinguishing liquid volume compared to the amount of coal for each fire extinguishing agent injection nozzle pressure according to an embodiment of the present invention.
12 is a table showing the storage period and temperature change for each location of the unloading coal when the fire extinguishing water is sprayed at a nozzle inclination of 20° according to an embodiment of the present invention.
13 is a table showing the storage period and temperature change for each location of the unloading coal when the fire extinguishing water is sprayed at a nozzle inclination of 40° according to an embodiment of the present invention.
14 is a table showing the storage period and temperature change for each location of the unloading coal when the fire extinguishing water is sprayed at a nozzle inclination of 60° according to an embodiment of the present invention.
15 is a graph showing the temperature measurement results in the 50 cm depth temperature sensor for each inclination and slope height of the fire extinguishing water nozzle according to an embodiment of the present invention.
16 is a graph showing an installation diagram of a temperature sensor for temperature measurement for each coal storage period of a coal pile of pyrotechnic coal according to an embodiment of the present invention.
FIG. 17 is a graph showing the temperature measurement results for each coal storage period of the sprayed fire coals at a nozzle inclination of 20° according to FIG. 12 .
FIG. 18 is a graph showing the temperature measurement results for each coal storage period of the fire extinguishing coal sprayed at a nozzle inclination of 40° according to FIG. 13 .
19 is a graph showing the temperature measurement results for each coal storage period of the fire extinguishing coal sprayed at a nozzle inclination of 50° according to FIG. 14 .

Since the present invention can have various changes and can have various embodiments, specific embodiments are illustrated in the drawings and will be described in detail in the detailed description. However, this is not intended to limit the present invention to a specific embodiment, it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention.

In describing each figure, like reference numerals are used for like elements. The terms first, second, etc. may be used to describe various elements, but the elements should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.

For example, without departing from the scope of the present invention, a first component may be referred to as a second component, and similarly, a second component may also be referred to as a first component. The term “and/or” includes a combination of a plurality of related listed items or any of a plurality of related listed items.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

Terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. shouldn't

Hereinafter, with reference to the accompanying drawings, a system and method for controlling a coal storage spontaneously ignited generated coal according to an embodiment of the present invention will be described in detail.

In general, water is the best extinguishing agent and coolant that can cool 639 kcal per 1 kg. It is known that the total caloric loss of coal is 80~320 kcal/kg, which is 1.5~5.85% of 5,400 kcal/kg, but if coal is extinguished immediately after ignition at 200°C or less before a flame occurs, it will be as low as 30 kcal/kg. it is known

Water is hydrophilic, so it can extinguish most fires efficiently by cooling, but it has low wettability and contact with the hydrophobic coal and oil components. I don't use it because I can't have it.

Of course, by adding surfactants and organic additives, wettability with oil is increased, but in use, toxic gases such as organic compounds are avoided due to generation of toxic gases. Therefore, the wettability can be improved by the forced contact method by using a fire extinguishing solution in which a small amount of calcium carbonate used as a desulfurization agent for fine dust precursors (SO ₂ ) in the exhaust gas of a boiler in a thermal power plant is hardly toxic in operation.

As such, in order to effectively prevent and/or suppress the spontaneous combustion of coal mines that handle and store coal on a large scale, calcium carbonate digested water is used to absorb heat from the coal surface and form a film on the coal surface when unloading and storing ignited coals. Thus, it is possible to devise a method to prevent oxygen absorption, to efficiently contact hydrophilic calcium carbonate water with hydrophobic high temperature coal surface, and to devise a fire extinguishing method to increase wettability.

First, spontaneous ignition has already occurred in the process of importing coal, so the surface temperature of coal with a surface temperature of 80~200℃ must be burned and stored below 65℃ to suppress spontaneous ignition.

In order to absorb the heat and carbon dioxide from the surface of the coal with a high surface temperature, 3~9mg CaCO ₃ /1L H ₂ O is used to absorb the heat from the coal surface and react with the exhaust gas carbon dioxide (CO ₂ ) to produce calcium bicarbonate (Ca( HCO ₃ ) ₂ ) is formed and a hard calcium salt (Ca-(O-CO-CH ₂ ) ₂ ) film is formed on the coal surface through a saponification reaction with the oil component ((HO-CO-CH ₂ )n) on the surface of the coal. It is possible to suppress the progress of spontaneous combustion by blocking the contact between the coal surface and oxygen.

CaCO ₃ + CO ₂ + H ₂ O + Heat → Ca(HCO ₃ ) ₂ <Reaction of coal surface ignition gas and heat absorption>

Ca(HCO ₃ ) ₂ + (HO-CO-CH ₂ )n (coal surface component)

→ Ca-(O-CO-CH ₂ ) ₂ + CO ₂ + H ₂ O <Saponification reaction>

In particular, the saponified compound (Ca-(O-CO-CH ₂ ) ₂ ) reacts with the fine dust precursor (SO2) generated in the boiler when reburning in the boiler to generate gypsum, so it is very beneficial because it acts as a desulfurization additive. .

Ca-(O-CO-CH ₂ ) ₂ + SO ₂ + O ₂ → CaSO ₄ + H ₂ O + CO ₂

Second, since the surface of coal is hydrophobic, it does not wet with water and does not react, so the injection pressure can be maintained in the range of 7 to 10 kgf/cm 2 to increase the frequency and wettability of the surface of the coal by adopting a forced contact method. By spraying a nozzle that is located at an angle of 5 to 20° upwards based on the ground surface, it induces even contact and wetting with the surface of the coarse coal accumulated at 1/3 of the slope from the bottom, where spontaneous ignition usually occurs, to heat the surface. It can be configured to cool the coal surface temperature of 80 to 200 ° C to 65 ° C or less by absorbing it.

Third, an infrared temperature measuring device is placed on the coal coal miner, and when the arrangement changes according to the movement of the coal coal miner, the fire extinguishing water spray nozzle is automatically configured to automatically move along the central axis of the infrared temperature measuring device, so that when the ignition starting coal above 80℃ is unloaded, it is automatically unloaded. It can be configured to be sprayed with The liquid-to-liquid ratio, which indicates the ratio of the extinguishing liquid and the amount of coal in Hatan, is configured to operate with 0.04 to 0.08ℓ of extinguishing water/kg Hatan coal. Through this method, effective ignition initiation can be prevented by extinguishing high-temperature coal.

1 is a structural diagram of an indoor-type coal storage 100 according to an embodiment of the present invention. In particular, FIG. 1 is a structural diagram of an indoor type coal storage currently constructed and operated in a coal-fired power plant. The indoor coal storage yard 100 is basically provided with a roof 20 on the ground 10, and is divided into a long-axis bulkhead 111 in the vertical direction and a short-axis bulkhead 110 in the horizontal direction in the roof 20. Desired coal 150 may be stored in each compartment divided by the bulkheads.

In addition, the conveyor unit 130 for transporting coal is installed in the same direction as the long axis bulkhead 111 so that the coal collecting unit 141 of the reclaimer 140) pushes the coal 150 toward the conveyor belt 131 side. The conveyor belt 131 moving by the inner conveyor roller 132 transfers the coal to the pulverizer storage (silo).

The temperature measuring device 121 for measuring the temperature of the ignition start coal during unloading is installed in the coal ejector 120, and the injection device 160 for receiving the data detected by the temperature measuring device 121 wirelessly and spraying fire extinguishing water is It is disposed between the conveyor belt 130 and the indoor coal storage reclaimer 140 . A plurality of temperature measuring instruments 121 are installed at regular intervals, and may be mainly infrared temperature sensors.

FIG. 2 is a cross-sectional view of the coal ejector 120 shown in FIG. 1 . Referring to FIG. 2 , the coal ejector 120 is configured in a lower funnel type. First and second infrared temperature measuring instruments 221 and 222 for measuring the temperature of the coal discharged to the lower side are disposed on the outside, and the coal discharger 120 is a pipe type. The outer supporter 290 serves only as a supporter in a mesh shape.

The coal loaded on the coal transport belt at the top of the indoor coal mine is loaded into the indoor coal mine through the coal ejector 120 of the coal miner. When the coal is lowered, the first and second infrared temperature measuring instruments 221 and 222 of the lower outer side connected to the coal ejector 120 are automatically operated. Of course, the first and second infrared temperature measuring instruments 221 and 222 are collectively referred to as the temperature measuring system 121 .

Figure 3 is a block diagram of the configuration of the coal storage spontaneously ignited generated coal control system 300 according to an embodiment of the present invention. Referring to FIG. 3 , the coal storage spontaneously ignited coal control system 300 may include a coal ejector 120 , a temperature measuring device 121 , a central control terminal 310 , an injection device 160 , and the like. .

The coal ejector 120 performs a function of dropping (that is, lowering) coal downwardly into an indoor coal yard.

The thermometer 121 generates temperature information by sensing the temperature of the coal to be mined. Accordingly, the temperature measuring meter 121 may be an infrared temperature sensor.

The central control terminal 310 is connected to the temperature measuring device 121 through the communication device 301 . Of course, the communication device 301 connects the temperature measuring meter 121 and the central control terminal 310 through a communication network. At this time, as the communication network, a wireless communication network such as IrDA (Infrared Data) communication, wireless LAN (Local Area Network), Bluetooth, LiFi (Light Fidelity), WiFi (Wireless Fidelity), NFC (Near Field Control), etc. may be used, but in this It is not limited, and may be S232, RS485, Modbus, CC-Link communication, Ethernet communication, or the like. Of course, in addition to Public Switched Telephone Network (PSTN), Public Switched Data Network (PSDN), Integrated Services Digital Networks (ISDN), Broadband ISDN (BISDN), Local Area Network (LAN) , a metropolitan area network (MAN), a wide area network (WLAN), or the like.

The central control terminal 310 may be a server, a personal computer, a notebook computer, or the like.

The injection device 160 may include a driving pump 320 , a spray nozzle 330 , an extinguishing fluid supply 340 , and the like. The driving pump 320 receives the extinguishing fluid from the extinguishing fluid tank 340 and supplies it to the spray nozzle 330 .

The spray nozzle unit 330 has a plurality of spray nozzles that can be adjusted in angle. The digestive fluid supply unit 340 performs a function of storing the digestive fluid. Digestive fluid may be calcium carbonate, magnesium carbonate, and the like.

Accordingly, the coal loaded on the coal transport belt at the top of the indoor coal mine is loaded into the indoor coal mine through the coal ejector 120 of the coal miner. When the coal is lowered, the lower outer temperature measuring device 121 connected to the coal ejector 120 is automatically operated, and when the temperature measuring device 121 detects coal with a surface temperature of 80° C. or higher, the communication device 301 transmits the temperature information to the center. It is transmitted to the control terminal 310 side.

The central control terminal 310 that has received the signal drives the driving pump 320 , and the injection nozzle 330 is operated through the driving pump 320 in the extinguishing fluid supply unit 340 , and the temperature of the coal surface is 80° C. It is configured so as not to operate the driving pump 320 when lowering to less than.

The temperature sensing of the ignition starting coal is performed by a temperature measuring device 121 disposed on the outside of the coal ejector 120 of the coal storage unit. Therefore, the arrangement 350 of the thermometer 121 is changed according to the movement of the coal hopper, so that the arrangement of the thermometer 121 is in a different direction (one of a, b, c, d, e, f, g). When moving, the temperature measuring device 121 gives a signal to the central control terminal 310 through the communication device 301 so that the spray nozzle 330 automatically moves to the central axis of the arrangement of the temperature measuring device 121 .

It is an on-off system that automatically injects when the ignition start time temperature is over 80℃ and automatically turns off when the temperature is less than 80℃ when unloading the ignition start of the coal storage tank.

4 is a flowchart illustrating a control process of a coal storage spontaneously ignited generated coal according to an embodiment of the present invention. Referring to FIG. 4 , the temperature measuring device 121) measures the surface temperature of coal to be mined according to the arrangement of the coal coal miners, and when a temperature of 80° C. or higher is detected, the communication device 301 receives a signal and the central control terminal ( 310) (steps S410, S420, S430, S440).

Thereafter, the central control terminal 310 gives a signal to operate the driving pump 320 and the injection nozzle 330, and the central control terminal 310 supplies power to the injection device 160 (step S461).

When power is supplied to the driving pump 320 of the injection device 160, the extinguishing fluid from the extinguishing fluid supply unit 340 is sucked into the extinguishing fluid suction confluence pipe (not shown), and the extinguishing fluid driving pump 320 through the suction amount control valve (not shown) ) (steps S462, S471, S472, and S473).

The fire extinguishing fluid sucked into the suction confluence pipe flows into the discharge confluence pipe (not shown) through the pump flow control valve (not shown), and through the control of the opening degree of the extinguishing fluid pump flow control valve (not shown), it is applied to the spray nozzle 330. It is possible to adjust the supplied pressure (step S463).

The extinguishing liquid flowing into the discharge confluence pipe (not shown) is sprayed onto the surface of the coal on which the extinguishing liquid is lowered by the spray nozzle 320 through a flow meter (not shown) and a pressure gauge (not shown) (steps S464 and S465).

The flow rate of fire extinguishing water flowing into the spray nozzle unit 330 is measured by a flow meter (not shown), and the pressure supplied to the spray nozzle unit 330 is measured by a pressure gauge (not shown). That is, it is configured to adjust the pressure supplied to the nozzles of the spray nozzle unit 330 by adjusting the opening degree of the extinguishing fluid pump flow rate control valve (not shown).

On the other hand, the central control terminal 310 drives a motor (not shown) at the same time as supplying power to the drive pump 320 , so as to move along the central axis of the array 350 of the temperature measuring meter 121 , the spray nozzle unit 330 . It is configured to move left and right by driving a position-adjusting ball screw (not shown) that pushes and pulls the position of the nozzle.

To this end, an angle adjusting plate (not shown) for adjusting the spray angle of the inclined surface of the nozzle and a motor (not shown) for driving the position adjusting ball screw (not shown) are configured. Therefore, when the angle adjustment plate is pushed to the right to increase the rotation angle of the nozzle upward, and the angle adjustment plate is pulled to the left rotation, the nozzle rotation angle is determined by the ground surface nozzle support (not shown) and the spring (elastic body) connected to the nozzle injection side. It is configured to return in the vertical direction.

On the other hand, the slope to the low coal slope with respect to the ground surface may be configured to be adjustable at any time.

Accordingly, the angle adjusting plate is moved by rotating the position adjusting ball screw (not shown) by a motor (not shown), so that the position of the nozzle can be moved left and right. Since such a structure is widely known, further description will be omitted. The nozzle can be configured to move to the left or right to adjust the position of the nozzle injection according to the arrangement of the temperature measuring meter 121 (steps S451, S452, S453, S454).

In other words, the central control terminal 310 drives a motor (not shown) while supplying power to the driving pump 320 .

On the other hand, the position adjustment ball screw, the motor, and the angle adjustment plate are rotation means. Of course, it is also possible to use a solenoid valve for this rotation means.

FIG. 5 is a conceptual diagram illustrating the operation of detecting an ignited bomb, and a driving pump 320 and a nozzle 501 according to an embodiment of the present invention. Referring to FIG. 5 , the arrangement (a, b, c, d, e, f) of the thermometer 121 attached to the outside of the coal hopper is changed according to the movement of the coal hopper. The injection nozzle 501 rotates according to the unloading position (a, b, c, d, e, f) of the temperature measuring device 121 of the coal ejector 120 . In addition, when the temperature measured by the temperature measuring device 121 is 80° C. or higher, the fire extinguishing liquid driving pump 320 and the extinguishing liquid spraying nozzle 501 are operated by receiving signals from the communication devices 531 and 532 and the central control terminal 310 do.

The spray nozzle 501 is supported by an angle adjustment plate 502 , which is connected to a position adjustment ball screw 503 . In addition, a motor 504 for rotating the position adjusting ball screw 503 is configured.

The flow rate of the extinguishing liquid flowing into the spray nozzle 501 is measured by the flow meter 510 , and the pressure supplied to the spray nozzle 501 is measured by the pressure gauge 520 . That is, the pressure supplied to the nozzle of the spray nozzle 501 can be adjusted by adjusting the opening degree of the extinguishing fluid pump flow rate control valve (not shown).

In addition, a wireless communication circuit 540 for wireless communication may be configured in the central control terminal 310 . Of course, the central control terminal 310 may be configured to include a modem for wired communication.

The first and second communication devices 531 and 532 include a wired/wireless transceiver (not shown), a microprocessor, a memory, a display, and the like. The display may be a liquid crystal display (LCD), a light emitting diode (LED) display, a plasma display panel (PDP), an organic LED (OLED) display, a touch screen, a cathode ray tube (CRT), a flexible display, or the like.

6 is a configuration block diagram of the central control terminal 310 shown in FIG. Referring to FIG. 6 , the central control terminal 310 may include an input unit 610 , a calculation unit 620 , a control unit 630 , an output unit 640 , and the like. Referring to FIG. 6 , the input unit 610 collects and receives information generated from the communication devices 301 , 531 , 532 , the temperature measurement meter 121 , the pressure gauge 520 , the flow meter 510 , and the like. Of course, the input unit 610 may be directly connected to the temperature meter 121 , the pressure gauge 520 , and the flow meter 510 , or may be connected only to the communication devices 301 , 531 , and 532 . Accordingly, the input unit 610 may include a digital signal processor (DSP), a communication circuit, a memory, and the like.

The calculator 620 performs a function of calculating a measured value by using measurement information measured by the temperature measuring meter 121 , the pressure gauge 520 , the flow meter 510 , and the like. In addition, the temperature information is monitored to perform a function of comparing the temperature information with a preset reference value. Of course, it performs a function of comparing the measured pressure and flow with preset values.

The control unit 630 generates a control command according to the comparison result generated by the calculation unit 620 , and transmits it to the injection device 160 and the communication devices 301 , 531 , and 532 to perform a control function.

The output unit 640 performs a function of displaying information processed by the calculation unit 620 , the analysis unit 630 , and the like. Accordingly, the output unit 640 may generate notification information using a combination of text, voice, and graphics. To this end, the output unit 640 may include a display, a sound system, and the like.

The display may be a liquid crystal display (LCD), a light emitting diode (LED) display, a plasma display panel (PDP), an organic LED (OLED) display, a touch screen, a cathode ray tube (CRT), a flexible display, or the like. In the case of a touch screen, it may function as an input means.

The calculation unit 620 and the analysis unit 630 illustrated in FIG. 6 mean a unit for processing at least one function or operation, which may be implemented in software and/or hardware. In hardware implementation, an application specific integrated circuit (ASIC), digital signal processing (DSP), programmable logic device (PLD), field programmable gate array (FPGA), processor, microprocessor, other It may be implemented as an electronic unit or a combination thereof. In software implementation, software composition component (element), object-oriented software composition component, class composition component and task composition component, process, function, attribute, procedure, subroutine, segment of program code, driver, firmware, microcode, data , databases, data structures, tables, arrays, and variables. Software, data, etc. may be stored in a memory and executed by a processor. The memory or processor may employ various means well known to those skilled in the art.

7 is a three-dimensional view of an indoor coal storage structure and ignition temperature sensing according to an embodiment of the present invention. Referring to FIG. 7 , it is a three-dimensional view of one block divided by a bulkhead of an indoor coal mine. One block has a volume of 13m x 16m x 12m in L (width), W (width), and height (H). The fire extinguishing water spraying device is configured according to the unloading position arrangement (a, b, c, d, e, f, g) that changes depending on the movement of the coal coal miner and the temperature measuring device 121 attached to the outside of the coal coal miner.

8 is a conceptual diagram for detecting the ignition temperature of an indoor coal storage unit and nozzle injection according to an embodiment of the present invention. Referring to FIG. 8 , the spray nozzle ( 501 in FIG. 5 ) of the spray nozzle machine is configured to rotate according to the thermometer arrangement (a, b, c, d, e, f, g), and is inclined with respect to the ground surface. It is configured to adjust the inclination (5~20°) of That is, the injection nozzle unit moves left and right by focusing on the unloading position (a, b, c, d, e, fg) of the incendiary bomb, and moves to the left and right positions of the injection nozzle 501 (910a, 910b, 910c, 910d, 910e, 910f). , 910 g).

The spray angle is 5 to 20° when spraying from the bottom of the slope to 1/3 of the slope based on the ground surface, and 20 to 40° inclination for spraying from 1/3 of the slope to 2/3 of the slope. In order to spray from the 3rd point to the top, it is configured to adjust the inclination to 40-65°. The inclination and diffraction angle of the nozzle are also adjusted according to the detected coal position arrangement and the coal surface temperature.

9 is a graph showing the temperature change of the fire extinguishing coal according to the pressure of the fire extinguishing agent injection nozzle according to an embodiment of the present invention. Referring to FIG. 9 , 5mg CaCO3/1L H2O fire water is used with a nozzle inclination of 15° to the upper vertical axis based on the ground surface, and the amount of coal is constant. This is the result of measuring the change in the coal surface temperature according to the nozzle injection pressure in

As an experimental result according to the pressure of the driving pump (320 in FIG. 3) according to the driving of the injection nozzle (501 in FIG. 5) while lowering the coal at 136°C, 7kgf/cm2 pressure (0.04ℓ fire water/kg for coal above 136°C) Hatan coal), the surface temperature was cooled to below 60℃, and the temperature was cooled up to a pressure of 10kgf/cm2 (0.08ℓ digested water/kg Hatan coal), whereas the cooling rate was not improved above 11kgf/cm2.

As such, by high-pressure spraying of calcium carbonate digested water in the range of 7∼11kg/cm2, it operates within the optimal liquid-to-liquid ratio range of 0.04∼0.08ℓ calcium carbonate digested water/kg Hatan coal to physically overcome the hydrophobicity of the coal surface and increase the contact frequency. and the cooling effect through improved wettability was found to be high.

10 is a graph showing the relationship between temperature and spontaneous heat generation according to an embodiment of the present invention. Referring to FIG. 10 , the ignition index grade for each coal is calculated according to the relationship between temperature and natural heat. This is shown in a table as follows.

Rank spontaneous heat T ¹⁸⁰ SCI A Fever difficulty >115 <2 B usually 85-115 2-4 C caution 70-85 4-8 D danger 50-70 8-20 E short-term fever <50 >20

The following Spontaneous Combustion Index (SCI) can be obtained as a predictive index for the correlation with coal properties.

The following table shows the calorific value of real coal, industrial analysis, and elemental analysis results.

Therefore, when converted into an SCI index, 20 or more corresponds to a short-term fever, 8-20 is dangerous, and 2 or less corresponds to a difficult bullet type. Here, HHV is High Heating Value, M is moisture, FC is fixed carbon, VM is volatile matter, and Ash is ash.

11 is a graph showing the change in the liquid-to-liquid ratio of the fire extinguishing liquid volume compared to the amount of coal for each fire extinguishing agent injection nozzle pressure according to an embodiment of the present invention. Referring to FIG. 11 , the liquid-to-liquid ratio of 0.04 to 0.08 L fire extinguishing water/kg hatan coal was found in 7-11 kgf/cm 2 , which is the optimum fire extinguishing efficiency pressure range when the injection nozzle is operated.

Example 1 (Evaluation of ignited carbon extinguishing properties)

In Example 1, the sub-bituminous SM bullets imported from Indonesia, which are known to have very severe spontaneous ignition by Biljeon 5, were targeted. As shown in Table 2, SM coal has a very high volatile content of 44.17%, and the oxygen concentration, which is a component of an oxygen functional group, is 21.54%, which is a component of elemental analysis, so that the ignition frequency is high.

The detailed specifications for each facility are as follows.

○ Coal outlet: 1m in diameter

○ Coal outlet: unloading capacity 100 ton/hr

○ Calcium carbonate tank capacity: 1,000 tons

○ Calcium carbonate concentration: 1.0∼11.0 mgCaCO3/1L H ₂ O

○ Infrared temperature measuring device: Maximum sensing temperature 400℃

○ Fire extinguishing fluid pump: Maximum discharge pressure 13kgf/㎠ (for variable damper)

○ Nozzle: Throat diameter 5cm

○ Liquid-to-liquid ratio: 0.01∼0.08ℓ fire extinguishing water/kg Hatan coal

Calcium carbonate (CaCO ₃ ) has a very low solubility in water at room temperature of 15.0 mgCaCO ₃ /1L H ₂ O or less. At the initial maximum temperature of 136°C, the ignited coal is cooled and extinguished by changing the concentration of the calcium carbonate extinguishing solution in the range of 1.0 to 11.0mgCaCO ₃ /1L H ₂ O at each interval of 10 mgCaCO ₃ /1L H ₂ O at the coal, injection pressure of 7 kgf/㎠. The results of measuring the effect are shown in the table below. As shown in the table below, when the calcium carbonate concentration is increased to 11.0 mgCaCO ₃ /1L H2O, the ignition initiator with a surface temperature of 136 ° C or higher is cooled to 45 ° C. As the concentration of calcium carbonate increases, the cooling fire extinguishing efficiency increases. It is confirmed that the optimum concentration of calcium carbonate as an extinguishing agent for ignited carbon is 3.0 to 9.0 mgCaCO ₃ /1L H ₂ O, which is a very low concentration range, for cooling and extinguishing up to the target range of 65°C.

The standard is 7kgf/cm ₂ .

The table below and FIG. 9 are the temperature changes of the fire extinguishing coals for each pressure of the fire extinguishing agent injection nozzle. The optimal concentration of calcium carbonate is 5mg CaCO ₃ /1L H ₂ O Fire water is set at a nozzle inclination of 20°, and the amount of coal is constant. It is the result of measuring the temperature change of the coal surface. As an experimental result according to the pressure of the driving pump according to the driving of the injection nozzle while lowering coal at 136℃ The temperature was cooled to less than 60℃, and the temperature was cooled up to a pressure of 10kgf/cm2 (0.08ℓ digested water/kg hatan coal), whereas it was found that the cooling rate became constant above 12kgf/cm2.

The standard is 5.0 mgCaCO ₃ /1L H ₂ O.

As such, the surface of the coal is hydrophobic, so it was found that the hydrophobicity was overcome in the calcium carbonate digested water in the pressure range of 9-11 kg/cm 2 , and the cooling and fire extinguishing effect was high through improved wettability. That is, as the injection pressure increases, the amount of sucked fire water increases and the liquid level ratio, which is the amount of fire extinguishing water compared to the coal amount of coal, also changes.

The change of the fire extinguishing liquid injection amount ratio (liquid height ratio) compared to the lower carbon amount by fire extinguishing agent injection nozzle pressure is shown in FIG. 11 . The liquid-to-liquid ratio of 0.056 to 0.08 ℓ fire extinguishing water/kg coal amount was found in the 9-11kgf/cm2, which is the optimum fire extinguishing efficiency pressure range when the injection nozzle is operated. The nozzle pressure of the coal at a surface temperature of 136° C., 10 kgf/cm 2 , and the temperature change of the fire coals by nozzle inclination are shown in FIG. 15 . In the case of 136℃ coal with a surface temperature above devolatilization, the nozzle slope from 10° to 60°C. If the nozzle slope is small, the cooling effect of the coal falling to the bottom is large, and as the slope increases, It was found that the cooling effect of the lowered fine powder was large.

Example 2 (Evaluation of spontaneous ignition generation characteristics of pyrotechnic coal piles)

In the case of Example 2, the size of the indoor coal pile is 10,600 m 2 of the coal pile surface area (based on 100,000 tons), 10,000 m ² on the sides, 600 m ₂ on the front and back sides, ₁₂ mH x 20 mW x 200 mL x both sides, and an apparent density of 0.8 ton/m ³ to be. In Example 2, one module 12mH x 16mW x 13m L section was used as the real section as shown in FIG. In the case of coal, coal extinguished at a nozzle slope of 20° while unloading coals ignited at 136°C is located in Area A (1.5m to 3.0m from the ground), and coals extinguished at a nozzle slope of 40° are located in Area B (3.0m to 6.0m). m), fire coals extinguished with a nozzle inclination of 60° are stored in area C (6.0m to 9.0m), and 500 tons of extinguished coal are divided into areas A, B, and C. It was installed at 1.5, 3, 6, 9, and 12 m positions at 3 m intervals, and at 3 m intervals in terms of width.

On the other hand, the depth of the temperature sensor was installed at atmospheric temperature and a depth of 0.5 m to measure the surface and inside temperatures. The temperature sensor is t-type and can measure up to 400℃, and the data logger is configured to store data for 8 days at 1-minute intervals. Temperature data were acquired at weekly intervals and performed by rebooting.

The table of FIG. 12 and FIG. 17 are the temperature changes for each coal storage period at a depth of 50 cm of 1.5 m, 3.0 m, and 6.0 m slopes of coal piled up while lowering coal at a surface temperature of 136° C. while spraying it with a nozzle inclination of 20°. In the case of 136℃ coal where water boils and devolatilization starts, the starting temperature is 1.5m by spraying at 10kgf/cm2 of injection pressure and 20° nozzle inclination, and the temperature at the 3.0m area is cooled to 40°C or less, and the 6.0m area It can be confirmed that it is cooled to about 65 °C.

In particular, it was found that the temperature did not rise even after 30 days of coal storage based on the atmospheric temperature around 30℃ and formed a uniform distribution to suppress spontaneous ignition. 12 is a table showing the storage period and temperature change for each location of the unloading coal when the fire extinguishing water is sprayed at a nozzle inclination of 20° according to an embodiment of the present invention.

13 and 18 are temperature changes for each coal storage period at a depth of 1.5 m, 3.0 m, and 6.0 m of coal accumulated while spraying coal at a surface temperature of 136° C. with a nozzle inclination of 40°. It can be seen that if the nozzle is sprayed to the middle of the slope with a nozzle inclination of 40°, the coal at 6.0m is cooled and digested, resulting in a significant decrease in temperature. On the other hand, coal accumulated in 1.5m and 3.0m areas where spontaneous ignition occurs frequently is not cooled to a stable temperature of 65℃ or less and is slightly cooled to 100℃ or less. Since the calcium carbonate reaction film was not completely formed, the oxidation reaction was active and spontaneous ignition occurred within 10 days.

On the other hand, in the case of the 6.0m high slope where spontaneous ignition is not much due to the relatively low porosity, the temperature rises only to 72℃ even after 30 days of coal storage, and spontaneous ignition does not occur. It was confirmed that when the fire extinguishing water was sprayed with a nozzle inclination of 40°, spontaneous ignition in the 1.5 to 3.0 m area where spontaneous ignition occurs frequently cannot be suppressed. 13 is a table showing the storage period and temperature change for each location of the unloading coal when the fire extinguishing water is sprayed at a nozzle inclination of 40° according to an embodiment of the present invention.

Tables 6 and 19 of FIG. 14 are temperature changes for each coal storage period at a depth of 1.5 m, 3.0 m, and 6.0 m of the coal piled up while spraying the coal at a surface temperature of 136° C. with a nozzle inclination of 60°. In the case of stacking fire pits while spraying the nozzle at a slope of 60° to the upper part of the slope, it was found that only the upper 60m point was slightly cooled and the temperature decreased, but the coal in the lower part was not cooled and extinguished at all. In particular, in the case of the lower 1.5 and 3.0 m points, where the ignition clusters are located, spontaneous ignition occurs rapidly within a week. It was found that the temperature did not rise to 250℃, which is the smoke generation temperature, until 30 days.

Therefore, in order to selectively suppress spontaneous ignition, the nozzle inclination is sprayed at 5 to 25° to intensively quench and extinguish the granulated powder accumulated on the lower part of the slope to lower the temperature and form a reaction film of calcium carbonate to block contact with oxygen. It was found that spontaneous ignition prevention was necessary. 14 is a table showing the storage period and temperature change for each location of the unloading coal when the fire extinguishing water is sprayed at a nozzle inclination of 60° according to an embodiment of the present invention.

15 is a graph showing the temperature measurement results in the 50 cm depth temperature sensor for each inclination and slope height of the fire extinguishing water nozzle according to an embodiment of the present invention. 15, the height of the slope of the coal that is cooled and extinguished by spraying fire extinguishing water at intervals of 10° in the range of 10-60° with a nozzle inclination in the upper vertical direction with respect to the ground surface is 1.5m, 3.0m, and 6.0m. Temperature at 50 cm depth of 9.0 m and 12.0 m. It can be seen that the lower the inclination of 10-20°, the closer to the floor as the coarse powder, the coal at a position of 1.5 to 3.0 m is cooled and cooled to 30°C. It can be seen that the higher the slope, the lower the temperature of the coal accumulated in the upper part because it is sprayed on the upper coal. An embodiment of the present invention is for selectively cooling and extinguishing only the coal in the portion where the ignition occurs when the pyrotechnic coal is unloaded.

16 is a graph showing an installation diagram of a temperature sensor for temperature measurement for each coal storage period of a coal pile of pyrotechnic coal according to an embodiment of the present invention. Referring to FIG. 16 , it is an installation view of a temperature sensor for measuring a temperature change of a depth of 50 cm according to the height of each slope after unloading fire munitions. The temperature sensors 7-1 to 7-5 are configured to measure the temperature below 400°C in real-time at 0.1°C intervals, and in the case of 1.5m, 3.0m, and above, which are the lower points from the floor, which are the ignition occurrence prediction points, They were installed on slopes of 6.0m, 9.0m, and 12.0m at intervals of 3.0m. The left and right width intervals were installed at 3.0 m.

In addition, the temperature sensor divides fire extinguishing water at an inclination of 20° vertically from the ground surface and stacks up while cooling and extinguishing, at a 40° inclination and stacking up by cooling and extinguishing at an inclination of 60°. sensor can be installed.

FIG. 17 is a graph showing the temperature measurement results for each coal storage period of the sprayed fire coals at a nozzle inclination of 20° according to FIG. 12 . Referring to FIG. 17 , it is a temperature change for each coal storage period at a depth of 1.5 m, 3.0 m, and 6.0 m of coal accumulated while spraying coal at a surface temperature of 136° C. with a nozzle inclination of 20°. In the case of 136℃ coal where water boils and devolatilization begins, the injection pressure is 11kgf/cm2 and the nozzle inclination is 20°. It can be confirmed that it is cooled to about 65°C. In particular, it was found that the temperature did not rise even after 30 days of coal storage based on the atmospheric temperature around 30℃ and formed a constant distribution to suppress spontaneous ignition.

FIG. 18 is a graph showing the temperature measurement results for each coal storage period of the fire extinguishing coal sprayed at a nozzle inclination of 40° according to FIG. 13 . Referring to FIG. 18 , it is a temperature change for each coal storage period at a depth of 1.5 m, 3.0 m, and 6.0 m of coal accumulated while spraying coal at a surface temperature of 136° C. with a nozzle inclination of 40°. It can be seen that if the middle part is sprayed with a nozzle inclination of 40°, the coal at 6.0m is cooled and digested and the temperature is lowered.

On the other hand, the coal accumulated in the 1.5m and 3.0m areas where ignition occurs frequently was cooled to below 100℃, but as the coal-lowering period passed, the porosity was high, so air communication was smooth, and the calcium carbonate reaction film was small, so the oxidation reaction was active for 10 days. It was found that spontaneous combustion occurred within In the case of the 6.0m area, it was found that even after 30 days of low coal period, the temperature rose only to 72℃ and spontaneous ignition was prevented. It was found that when the fire extinguishing water was sprayed at an angle of 40°, spontaneous ignition in the 15 to 3.0 m area where spontaneous ignition occurs frequently could not be suppressed.

19 is a graph showing the temperature measurement results for each coal storage period of the fire extinguishing coal sprayed at a nozzle inclination of 50° according to FIG. 14 . Referring to FIG. 19 , it is a temperature change for each coal storage period at a depth of 1.5m, 3.0m, and 6.0m of the coal piled up while spraying the coal at a surface temperature of 136°C with a nozzle slope of 60°. When spraying the upper part with a nozzle inclination of 60°, it was found that only the 6.0m point was slightly cooled and the temperature decreased, but the remaining coal was not cooled and digested at all. In particular, in the case of the lower 15 and 3.0 m points, spontaneous ignition occurs within a week. It was found that the temperature did not rise to 250 °C.

In addition, the steps of the method or algorithm described in connection with the embodiments disclosed herein are implemented in the form of program instructions that can be executed through various computer means such as a microprocessor, a processor, a CPU (Central Processing Unit), etc. It can be recorded on any available medium. The computer-readable medium may include program (instructions) codes, data files, data structures, and the like alone or in combination.

The program (instructions) code recorded on the medium may be specially designed and configured for the present invention, or may be known and available to those skilled in the art of computer software. Examples of the computer-readable recording medium include magnetic media such as hard disks, floppy disks and magnetic tapes, optical media such as CD-ROMs, DVDs, Blu-rays, and the like, and ROM, RAM ( A semiconductor memory device specially configured to store and execute program (instruction) code such as RAM), flash memory, and the like may be included.

Here, examples of the program (instruction) code include not only machine language codes such as those generated by a compiler but also high-level language codes that can be executed by a computer using an interpreter or the like. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.

*300: Low-coal mine spontaneously ignited munitions control system
120: coal ejector
121: temperature meter
160: injection device
301: communication device
310: central control terminal
320: drive pump
330: spray nozzle
340: digestive fluid supply

Claims (1)

(a) generating temperature information by sensing the temperature of the coal that is dropped from the coal discharger 120 of the coal storage unit 121;
(b) generating, by the central control terminal 310, the temperature information and a preset reference value, and generating a spraying control command to spray the extinguishing liquid on the dropped coal according to the comparison result; and
(c) spraying the extinguishing liquid according to the spraying control command by the spraying device 160;
The injection device 160,
The spray nozzle unit 330 having a plurality of spray nozzles that can be adjusted in angle; and
and a driving pump 320 for supplying the fire extinguishing liquid to the spray nozzle 330.
As the coal ejector 120 moves, the arrangement (a, b, c, d, e, f, g) of the thermometer 121 is moved in different directions,
The fire extinguishing liquid reacts with carbon dioxide (CO ₂ ), which is an exhaust gas, while absorbing heat from the coal surface to form calcium bicarbonate (Ca(HCO ₃ ) ₂ ), and the oil component on the coal surface ((HO-CO-CH ₂ )n) and Hydrophilic carbonic acid that forms a hard calcium salt (Ca-(O-CO-CH ₂ ) ₂ ) film on the coal surface through the saponification reaction of calcium digestible water,
The temperature measuring meter 121 is installed at regular intervals from the floor for each coal storage period, and is installed by dividing the fire extinguishing water by spraying the fire extinguishing water at a specific angle perpendicular to the ground surface and dividing it into parts piled up while cooling and extinguishing,
Coal minefield spontaneously ignited coal control, characterized in that the slope from the bottom of the slope to the 1/3 point, from the 1/3 point to the 2/3 point, and from the 2/3 point to the top of the slope based on the ground surface is divided according to the slope Way.

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