CN106290703A - Coal thermal insulation spontaneous combustion experimental provision and method - Google Patents

Abstract

The invention discloses a kind of coal thermal insulation spontaneous combustion experimental provision, including gas bath calorstat, coal sample tank, air supply system and temperature control system；Gas bath calorstat includes gas bath calorstat casing, gas bath calorstat chamber door, burner hearth, heating unit and equal Hot-air fan；Coal sample tank is made up of tank body and cover, and tank body is made up of internal layer tank body and outer layer tank body, is provided with air inlet pipe in the gap between internal layer tank body and outer layer tank body, and cover is provided with the second through hole and escape pipe；Temperature control system includes controller module, controls computer, the first temperature probe, the second temperature probe and computer heating control relay；Air supply system includes air source of the gas, drying tube, pressure maintaining valve, mass-flow gas meter and the economizer bank being sequentially connected with；The invention also discloses a kind of coal thermal insulation spontaneous combustion experimental technique.The present invention realizes convenient and low cost, uses easy to operate, and temperature controls accurately, it is possible to the more accurately evolution process of spontaneous combustion of simulated coal intensification high temperature dot, practical.

Description

Coal Adiabatic Spontaneous Combustion Experimental Apparatus and Method

technical field

The invention belongs to the technical field of coal spontaneous combustion experiments, and in particular relates to a coal adiabatic spontaneous combustion experiment device and method.

Background technique

Coal spontaneous combustion fire is a global disaster, which seriously threatens human health, natural environment and coal mine safety production, and causes huge resource loss and environmental pollution. The formation and evolution process of coal spontaneous combustion fire is complex, the oxidation heating time is long, the range is wide, the high-temperature fire source is hidden, and the control is difficult, which has become an urgent problem to be solved. The spontaneous combustion tendency test of coal is the basis and basis for the prevention and control of coal spontaneous combustion. There are many experimental devices for testing the propensity of coal spontaneous combustion, mainly including large-scale coal spontaneous combustion test bench and coal spontaneous combustion low temperature programmed temperature test device. However, both of these test benches have their inherent shortcomings. For example, the large-scale coal spontaneous combustion test bench has a long test time and poor repeatability; the coal spontaneous combustion low-temperature programmed temperature test device passively heats the coal sample, and it is difficult to accurately reflect the characteristics of the coal spontaneous combustion process. Therefore, it is necessary to develop a test device that can avoid the shortcomings of the above two test devices.

Contents of the invention

The technical problem to be solved by the present invention is to provide a simple structure, novel and reasonable design, convenient implementation and low cost, convenient use and operation, precise temperature control, and more accurate simulation of coal spontaneous combustion and high temperature. Coal adiabatic spontaneous combustion and ignition experimental device with strong practicability, good use effect, and easy to popularize and use.

In order to solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a coal adiabatic spontaneous combustion experiment device, which is characterized in that it includes a gas bath constant temperature box and a coal sample tank arranged in the gas bath constant temperature box for placing coal samples , and gas supply system and temperature measurement and control system;

The air bath constant temperature box includes a cubic air bath constant temperature box body and an air bath constant temperature box door arranged on the front side of the air bath constant temperature box body. The top of the air bath constant temperature box body is provided with a first A through hole, the first through hole is provided with a plug for sealing the first through hole, and the gas bath thermostat box body after the gas bath thermostat box door and the gas bath thermostat box body are closed The inner space is a furnace, the four sides of the furnace and the bottom of the furnace are provided with heating units, the geometric centers of the four sides of the furnace are all provided with heat-soaking fans, and the gas bath constant temperature box body is It is composed of a mirror iron layer located outside the furnace and a stainless steel plate located outside the mirror iron layer, the gap between the mirror iron layer and the stainless steel plate is a vacuum insulation cavity, and the vacuum insulation cavity is filled with insulation asbestos;

The coal sample tank is composed of a tank body and a tank cover tightly connected by bolts, the tank body is composed of an inner tank body and an outer tank body, and the gap between the inner tank body and the outer tank body is An air intake pipe is provided, the lower end of the air intake pipe penetrates into the interior of the inner tank body, the upper end of the air intake pipe protrudes outside the gap between the inner layer tank body and the outer layer tank body, and the tank cover is provided with a second Two through holes and the lower end extend into the air outlet pipe inside the inner tank body, and the upper end of the air inlet pipe and the upper end of the air outlet pipe all pass through the first through hole to the outside of the gas bath thermostat box;

The temperature measurement and control system includes a controller module and a control computer, as well as a first temperature measuring probe for real-time detection of the internal temperature of the coal sample tank and a second temperature probe for real-time detection of the external temperature of the coal sample tank. A temperature measuring probe, the first temperature measuring probe extends into the inner tank body through the second through hole, the second temperature measuring probe is arranged in the gas bath thermostat and is located outside the coal sample tank, Both the output end of the first temperature measuring probe and the output end of the second temperature measuring probe are connected to the input end of the controller module, the output end of the controller module is connected with a heating control relay, and the heating control relay is connected in series In the power supply circuit of the heating unit;

The air supply system includes an air source, a drying pipe, a pressure stabilizing valve, a gas mass flow meter and a preheating pipe connected in sequence, the upper end of the inlet pipe is connected to the preheating pipe, and the gas mass flow meter is connected to the controller The modules are connected, the controller module is connected with a communication circuit module, and the communication circuit module is connected with the control computer.

The above-mentioned coal adiabatic spontaneous combustion experiment device is characterized in that: the door of the gas bath constant temperature box is hinged to the gas bath constant temperature box body through a hinge.

The above-mentioned coal adiabatic spontaneous combustion experiment device is characterized in that: the shape of the first through hole is tubular, and the upper end surface of the first through hole is higher than the upper surface of the gas bath constant temperature box.

The above-mentioned coal adiabatic spontaneous combustion experimental device is characterized in that: the heat soaking fan is an axial flow fan.

The above-mentioned coal adiabatic spontaneous combustion experiment device is characterized in that: the shape of the tank is cylindrical, and the inner and outer tanks, as well as the air inlet pipe and the air outlet pipe are all made of red copper.

The above-mentioned coal adiabatic spontaneous combustion experiment device is characterized in that: the air source is a compressed air bottle or an oil-free air pump.

The above-mentioned coal adiabatic spontaneous combustion experimental device is characterized in that: the first temperature measuring probe and the second temperature measuring probe are both PT-100 temperature probes, the heating unit is a heating resistance wire, and the heating resistance wire is embedded in On the mirror iron layer; the controller module is a PLC module, and the heating control relay is an EUV-10A solid state relay.

The above-mentioned coal adiabatic spontaneous combustion experiment device is characterized in that: the height of the first temperature measuring probe protruding into the inner tank body is half of the height of the inner tank body.

The present invention also provides a coal adiabatic spontaneous combustion experimental method with simple steps, convenient implementation, more accurate simulation of the evolution process of the high temperature point of coal spontaneous combustion, strong practicability, and good use effect, characterized in that the method includes The following steps:

Step 1. Put the crushed and screened coal sample into the inner tank body, and extend the first temperature measuring probe into the inner tank body through the second through hole, and then put the tank body and the tank cover together Airtight;

Step 2: Open the door of the gas bath constant temperature box, place the coal sample tank in the gas bath constant temperature box, remove the plug used to seal the first through hole, and connect the upper end of the air inlet pipe and the outlet pipe The upper ends pass through the first through hole to the outside of the gas bath incubator, and the second temperature measuring probe is arranged in the air bath incubating box, and the signal line of the first temperature measuring probe is connected to the second temperature measuring The signal line of the probe passes through the first through hole to the outside of the gas bath incubator, connects the upper end of the air intake pipe with the preheating pipe, and connects the signal line of the first temperature measuring probe with the signal of the second temperature measuring probe. The line is connected to the input end of the controller module, and then the first through hole is sealed;

Step 3. Carry out an air tightness check on the air supply system and the air intake pipe, and close the door of the air bath incubator after no air leakage;

Step 4, connecting the gas chromatograph to the upper end of the outlet pipe;

Step 5, operate the control computer, set the upper temperature limit in the coal sample tank, and send a control signal to start heating to the controller module, the controller module controls the heating control relay to connect the power supply circuit of the heating unit, and the heating unit start heating;

Step 6. Disconnect the drying tube from the air source, connect the drying tube to the nitrogen gas source, and feed nitrogen into the coal sample tank until the first temperature measuring probe and the second temperature measuring probe detect After the temperature value is stable, disconnect the drying tube from the nitrogen gas source, connect the drying tube to the air source, and start the coal adiabatic spontaneous combustion experiment;

Step 7. During the heating process of the heating unit, the first temperature measuring probe detects the internal temperature of the coal sample tank in real time, the second temperature measuring probe detects the external temperature of the coal sample tank in real time, and the controller module detects the first measuring temperature. The internal temperature signal of the coal sample tank detected by the temperature probe and the external temperature signal of the coal sample tank detected by the second temperature measuring probe are periodically sampled and transmitted to the control computer for display, and the internal temperature signal of the coal sample tank is displayed. The sampling value of the temperature signal is compared with the set temperature upper limit value. When the sampling value does not reach the set temperature upper limit value, the controller module controls the heating control relay to continuously connect the power supply circuit of the heating unit, and the heating unit continues to Heating, when the sampling value reaches the set temperature upper limit, the controller module controls the heating control relay to disconnect the power supply circuit of the heating unit, and the heating unit stops heating; at the same time, the controller module records that the temperature in the coal sample tank reaches The temperature point that needs to be tested for the adiabatic spontaneous combustion experiment on the coal sample. When the temperature in the coal sample tank reaches the temperature point that needs to be tested for the adiabatic spontaneous combustion experiment on the coal sample, the gas chromatographic analyzer will detect the coal sample. Gas components are detected.

The above-mentioned method is characterized in that: the upper temperature limit in the coal sample tank set in step five is 200° C. to 1000° C., and the temperature point to be tested for the adiabatic spontaneous combustion experiment on the coal sample in step seven is temperature points in multiples of ten.

Compared with the prior art, the present invention has the following advantages:

1. The coal adiabatic spontaneous combustion experiment device of the present invention has simple structure, novel and reasonable design, convenient implementation and low cost.

2. The coal adiabatic spontaneous combustion experiment device of the present invention is easy to use and operate, can increase the temperature of the coal spontaneous combustion experiment to 200°C-1000°C, and can more accurately simulate the evolution process of the high temperature point of coal spontaneous combustion.

3. The coal adiabatic spontaneous combustion experiment device of the present invention, by setting the controller module, the first temperature measuring probe, the second temperature measuring probe, the heating unit and the heat soaking fan, the temperature can be controlled accurately, and the temperature raising experiment of various heating methods can be carried out , which can more accurately simulate the evolution process of the high temperature point of coal spontaneous combustion.

4. The method steps of the coal adiabatic spontaneous combustion experimental method of the present invention are simple and easy to implement, and the recorded experimental data can be used to establish a related coal spontaneous combustion model to guide the prevention and control project of coal spontaneous combustion.

5. The present invention has strong practicability, good application effect, and is convenient for popularization and use.

To sum up, the present invention is novel and reasonable in design, convenient in implementation and low in cost, convenient in use and operation, precise in temperature control, and can more accurately simulate the evolution process of the high temperature point of spontaneous combustion of coal. It is practical, effective in use, and easy to popularize use.

The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

Description of drawings

Fig. 1 is a schematic structural diagram of a coal adiabatic spontaneous combustion experiment device of the present invention.

Fig. 2 is a schematic block diagram of the circuit of the temperature measurement and control system of the present invention.

Explanation of reference signs:

1—air bath incubator; 2—mirror iron layer; 3—stainless steel plate;

4—the hearth; 5—the first through hole; 6—the vacuum insulation chamber;

7—outer tank; 8—inner tank; 9—air intake pipe;

10—air outlet pipe; 11—second through hole; 12—heating unit;

13—coal sample; 14—coal sample tank; 15—tank cover;

16—air source; 17—drying pipe; 18—regulator valve;

19—gas mass flowmeter; 20—preheating tube; 21—controller module;

22—communication circuit module; 23—control computer; 24—first temperature measuring probe;

25—second temperature measuring probe; 26—heating control relay; 27—gas chromatography analyzer; 28—soaking fan.

detailed description

As shown in Figure 1, the coal adiabatic spontaneous combustion experiment device of the present invention comprises a gas bath thermostat 1 and a coal sample tank 14 arranged in the gas bath thermostat 1 and used to place a coal sample 13, and a gas supply system and temperature control system;

The air bath constant temperature box 1 comprises a cubic air bath constant temperature box body and an air bath constant temperature box door arranged on the front side of the air bath constant temperature box body. The top of the air bath constant temperature box body is provided with a second A through hole 5, the first through hole 5 is provided with a plug for sealing the first through hole 5, the air bath after the gas bath thermostat box door is closed with the gas bath thermostat box body The inner space of the thermostatic box is a furnace 4, and heating units 12 are arranged on the four sides of the furnace 4 and the inner bottom of the furnace 4, and a heat-soaking fan is arranged at the geometric centers of the four sides of the furnace 4. 28. The air bath constant temperature box body is composed of a mirror iron layer 2 located outside the furnace 4 and a stainless steel plate 3 located outside the mirror iron layer 2, and the gap between the mirror iron layer 2 and the stainless steel plate 3 is Vacuum insulation cavity 6, filled with thermal insulation asbestos in the vacuum insulation cavity 6; during specific implementation, the aperture of the first through hole 5 is 30mm, the length of the furnace 4 is 800mm, and the width of the furnace 4 is 800mm , the height of the furnace 4 is 1400mm; the length of the gas bath thermostat box is 1200mm, the width of the gas bath thermostat box is 1200mm, and the height of the gas bath thermostat box is 1400mm;

The coal sample tank 14 is made up of a tank body and a tank cover 15 that are airtightly connected by bolts, the tank body is composed of an inner tank body 8 and an outer tank body 7, and the inner tank body 8 and the outer tank body 7 is provided with an air intake pipe 9 in the gap, the lower end of the air intake pipe 9 penetrates the inside of the inner tank body 8, and the upper end of the air intake pipe 9 stretches out between the inner tank body 8 and the outer layer tank body 7 Outside the gap, the tank cover 15 is provided with a second through hole 11 and an air outlet pipe 10 whose lower end extends into the inner tank body 8. The upper end of the air inlet pipe 9 and the upper end of the air outlet pipe 10 are connected from the first through The hole 5 passes out to the outside of the gas bath thermostat box;

In conjunction with Fig. 2, the temperature measurement and control system includes a controller module 21 and a control computer 23, and a first temperature measuring probe 24 for real-time detection of the internal temperature of the coal sample tank 14 and for monitoring the coal sample tank 14. 14 The second temperature measuring probe 25 for real-time detection of the external temperature, the first temperature measuring probe 24 extends into the inner tank body 8 through the second through hole 11, and the second temperature measuring probe 25 is arranged on the In the gas bath constant temperature box 1 and outside the coal sample tank 14, the output end of the first temperature measuring probe 24 and the output end of the second temperature measuring probe 25 are all connected to the input end of the controller module 21, and the The output terminal of the controller module 21 is connected with a heating control relay 26, and the heating control relay 26 is connected in series in the power supply circuit of the heating unit 12;

The air supply system includes an air source 16, a drying pipe 17, a pressure stabilizing valve 18, a gas mass flow meter 19 and a preheating pipe 20 connected in sequence, and the upper end of the air intake pipe 9 is connected with the preheating pipe 20, and the The gas mass flowmeter 19 is connected with the controller module 21 , the controller module 21 is connected with the communication circuit module 22 , and the communication circuit module 22 is connected with the control computer 23 . By setting the preheating pipe 20, sufficient preheating of the air entering the coal sample tank 14 can be achieved and the temperature of the environment can be balanced; during specific implementation, the preheating pipe 20 is made of copper pipe.

In this embodiment, the door of the gas bath thermostat is hinged to the body of the gas bath thermostat through a hinge. During specific implementation, the box body of the gas bath constant temperature box is made by welding.

In this embodiment, as shown in FIG. 1 , the shape of the first through hole 5 is tubular, and the upper surface of the first through hole 5 is higher than the upper surface of the gas bath constant temperature box.

In this embodiment, the heat equalizing fan 28 is an axial flow fan. By arranging the uniform heat fan 28 at the geometric center of the four sides in the furnace 4, the temperature in the gas bath constant temperature box 1 can be guaranteed to be uniform.

In this embodiment, the shape of the tank body is cylindrical, and the inner tank body 8 and the outer tank body 7, as well as the air inlet pipe 9 and the air outlet pipe 10 are all made of red copper.

In this embodiment, the air source 16 is a compressed air bottle or an oil-free air pump.

In this embodiment, the first temperature measuring probe 24 and the second temperature measuring probe 25 are both PT-100 temperature probes, the heating unit 12 is a heating resistance wire, and the heating resistance wire is embedded on the mirror iron layer 2 ; The controller module 21 is a PLC module, and the heating control relay 26 is an EUV-10A solid state relay. During specific implementation, the heating rate of the heating resistance wire is 0.01°C/min˜20°C/min, and the temperature stability of the heating resistance wire is ±0.1°C. The accuracy of the PT-100 temperature probe is ±0.1+0.0017T, and the outside of the PT-100 temperature probe is packed with polytetrafluoroethylene.

In this embodiment, as shown in FIG. 1 , the height at which the first temperature measuring probe 24 protrudes into the inner tank body 8 is half of the height of the inner tank body 8 . By setting the first temperature measuring probe 24 in this way, a relatively accurate internal temperature of the coal sample tank 14 can be measured.

Coal adiabatic spontaneous combustion ignition experimental method of the present invention comprises the following steps:

Step 1: Put the crushed and screened coal sample 13 into the inner tank body 8, and extend the first temperature measuring probe 24 into the inner tank body 8 through the second through hole 11, and then place the The tank body and tank cover 15 are airtight;

Step 2: Open the door of the gas bath incubator, place the coal sample tank 14 in the gas bath incubator 1, remove the plug for sealing the first through hole 5, and place the upper end of the air inlet pipe 9 and the upper end of the air outlet pipe 10 pass through the first through hole 5 to the outside of the gas bath thermostat casing, the second temperature measuring probe 25 is set in the gas bath thermostat 1, and the first temperature measuring probe The signal line of 24 and the signal line of the second temperature measuring probe 25 pass through the first through hole 5 to the outside of the gas bath incubator casing, the upper end of the air inlet pipe 9 is connected with the preheating pipe 20, and the first measuring The signal line of the temperature probe 24 and the signal line of the second temperature measuring probe 25 are connected to the input end of the controller module 21, and then the first through hole 5 is sealed;

Step 3: Carry out an air tightness check on the air supply system and the intake pipe 9, and close the door of the air bath thermostat after no air leakage;

Step 4, the gas chromatograph analyzer 27 is connected to the upper end of the outlet pipe 10;

Step 5, operate the control computer 23, set the upper temperature limit in the coal sample tank 14, and send a control signal to start heating to the controller module 21, and the controller module 21 controls the heating control relay 26 to connect the heating unit 12 power supply circuit, the heating unit 12 starts heating;

Step 6, disconnect the drying pipe 17 from the air source 16, connect the drying pipe 17 to the nitrogen gas source, feed nitrogen into the coal sample tank 14, wait for the first temperature measuring probe 24 and the second After the temperature value detected by the temperature measuring probe 25 is stable, the drying pipe 17 is disconnected from the nitrogen source, and the drying pipe 17 is connected to the air source 16 to start the coal adiabatic spontaneous combustion experiment;

Step 7, during the heating process of the heating unit 12, the first temperature measuring probe 24 detects the internal temperature of the coal sample tank 14 in real time, and the second temperature measuring probe 25 detects the external temperature of the coal sample tank 14 in real time, and the controller The module 21 periodically samples the internal temperature signal of the coal sample tank 14 detected by the first temperature measuring probe 24 and the external temperature signal of the coal sample tank 14 detected by the second temperature measuring probe 25 and transmits them to the control computer 23 display, and compare the sampling value of the internal temperature signal of the coal sample tank 14 with the set temperature upper limit value, when the sampling value does not reach the set temperature upper limit value, the controller module 21 controls the heating control Relay 26 continuously connects the power supply circuit of heating unit 12, and heating unit 12 continues to heat. Unit 12 stops heating; meanwhile, controller module 21 records that the temperature in the coal sample tank 14 reaches the temperature point required for the coal sample 13 to be tested for adiabatic spontaneous combustion experiment, and the temperature in the coal sample tank 14 reaches the required temperature point. When the coal sample 13 is subjected to the temperature point required for the adiabatic spontaneous combustion experiment, the gas chromatograph analyzer 27 detects the gas components produced by the coal sample 13 . During specific implementation, the gas chromatographic analyzer 27 selects SP2120 gas chromatographic analyzer 27 dedicated to mine gas analysis, which can analyze O ₂ , N ₂ , CO, CO ₂ , CH ₄ , C ₂ H ₆ , C ₂ H ₄ , C ₂ H ₂ and other gas components are separated and detected; the data recorded by the gas chromatographic analyzer 27 can be used to judge the combustion of the coal sample 13, and establish a related coal spontaneous combustion model to guide the prevention and control of coal spontaneous combustion.

In this embodiment, the upper temperature limit in the coal sample tank 14 set in step 5 is 200°C to 1000°C, and the temperature point to be tested for the adiabatic spontaneous combustion experiment on the coal sample 13 in step 7 is 10°C. multiples of temperature points.

The above are only preferred embodiments of the present invention, and do not limit the present invention in any way. All simple modifications, changes and equivalent structural changes made to the above embodiments according to the technical essence of the present invention still belong to the technical aspects of the present invention. within the scope of protection of the scheme.

Claims (10)

1. a coal thermal insulation spontaneous combustion experimental provision, it is characterised in that: include gas bath calorstat (1) and be arranged on gas bath constant temperature In case (1) and be used for placing the coal sample tank (14) of coal sample (13), and air supply system and temperature control system；

Described gas bath calorstat (1) includes the gas bath calorstat casing of cubic shaped and is arranged on described gas bath calorstat casing The gas bath calorstat chamber door in front, the top of described gas bath calorstat casing is provided with the first through hole (5), described first through hole (5) being provided with the plug for sealing the first through hole (5) on, described gas bath calorstat chamber door closes with described gas bath calorstat casing Described gas bath calorstat housing interior volume after conjunction is burner hearth (4), on interior four sides of described burner hearth (4) and in burner hearth (4) Bottom is provided with heating unit (12), and the geometric center position of interior four sides of described burner hearth (4) is provided with equal hot blast Fan (28), described gas bath calorstat casing is by being positioned at minute surface iron sheet layer (2) in described burner hearth (4) outside and being positioned at minute surface iron sheet layer (2) corrosion resistant plate (3) in outside is constituted, and the gap between described minute surface iron sheet layer (2) and corrosion resistant plate (3) is vacuum heat-preserving chamber (6), it is filled with insulation asbestos in described vacuum heat-preserving chamber (6)；

Described coal sample tank (14) is formed by by tank body and the cover (15) of bolt airtight connection, and described tank body is by internal layer tank body (8) constitute with outer layer tank body (7), in the gap between described internal layer tank body (8) and outer layer tank body (7), be provided with air inlet pipe (9), It is internal that the lower end of described air inlet pipe (9) penetrates internal layer tank body (8), the upper end of described air inlet pipe (9) reach internal layer tank body (8) and Outside gap between outer layer tank body (7), described cover (15) is provided with the second through hole (11) and internal layer tank body is stretched in lower end (8) internal escape pipe (10), the upper end of described air inlet pipe (9) and the upper end of escape pipe (10) all pass from the first through hole (5) Outside described gas bath calorstat casing；

Described temperature control system includes controller module (21) and controls computer (23), and for described coal sample tank (14) internal temperature detects in real time the first temperature probe (24) and for described coal sample tank (14) external temperature is carried out Second temperature probe (25) of detection in real time, described first temperature probe (24) stretches into internal layer tank body through the second through hole (11) (8) internal, in described second temperature probe (25) is arranged on described gas bath calorstat (1) and be positioned at described coal sample tank (14) outward Portion, the outfan of described first temperature probe (24) and the outfan of the second temperature probe (25) all with controller module (21) Input connects, and the outfan of described controller module (21) is connected to computer heating control relay (26), described computer heating control relay Device (26) is connected in the current supply circuit of heating unit (12)；

Air source of the gas (16) that described air supply system includes being sequentially connected with, drying tube (17), pressure maintaining valve (18), gas mass flow Meter (19) and economizer bank (20), the upper end of described air inlet pipe (9) is connected with economizer bank (20), described mass-flow gas meter (19) It is connected with controller module (21), described controller module (21) is connected to communication circuit module (22), described telecommunication circuit mould Block (22) is connected with controlling computer (23).

2. according to the coal thermal insulation spontaneous combustion experimental provision described in claim 1, it is characterised in that: described gas bath calorstat chamber door Hinged with described gas bath calorstat casing by hinge.

3. according to the coal thermal insulation spontaneous combustion experimental provision described in claim 1, it is characterised in that: described first through hole (5) Being shaped as tubulose, the upper surface of described first through hole (5) is higher than the upper surface of described gas bath calorstat casing.

4. according to the coal thermal insulation spontaneous combustion experimental provision described in claim 1, it is characterised in that: described equal Hot-air fan (28) is Tube-axial fan.

5. according to the coal thermal insulation spontaneous combustion experimental provision described in claim 1, it is characterised in that: being shaped as of described tank body is round Cylindricality, described internal layer tank body (8) and outer layer tank body (7), and air inlet pipe (9) and escape pipe (10) are made by red copper material.

6. according to the coal thermal insulation spontaneous combustion experimental provision described in claim 1, it is characterised in that: described air source of the gas (16) is Compressed air bottle or oil-free air pump.

7. according to the coal thermal insulation spontaneous combustion experimental provision described in claim 1, it is characterised in that: described first temperature probe (24) and the second temperature probe (25) is PT-100 temperature probe, and described heating unit (12) is resistive heater, described in add Hot water radiation wire is embedded on minute surface iron sheet layer (2)；Described controller module (21) is PLC module, described computer heating control relay (26) it is EUV-10A solid-state relay.

8. according to the coal thermal insulation spontaneous combustion experimental provision described in claim 1, it is characterised in that: described first temperature probe (24) half that the internal height of internal layer tank body (8) is internal layer tank body (8) height is stretched into.

9. utilizing the method that experimental provision as claimed in claim 1 carries out the experiment of coal thermal insulation spontaneous combustion, its feature exists In, the method comprises the following steps:

Step one, coal sample (13) loading internal layer tank body (8) inside that will crush, sieved, and the first temperature probe (24) is worn Cross the second through hole (11) and stretch into internal layer tank body (8) inside, then by airtight to described tank body and cover (15)；

Step 2, open described gas bath calorstat chamber door, described coal sample tank (14) be placed in described gas bath calorstat (1), Remove the plug for sealing the first through hole (5), by the upper end of air inlet pipe (9) and the upper end of escape pipe (10) all from the first through hole (5) pass outside described gas bath calorstat casing, the second temperature probe (25) is set in described gas bath calorstat (1), and The holding wire of the first temperature probe (24) and the holding wire of the second temperature probe (25) are passed described gas from the first through hole (5) Outside bath calorstat casing, the upper end of air inlet pipe (9) is connected with economizer bank (20), by the holding wire of the first temperature probe (24) It is connected with the input of controller module (21) with the holding wire of the second temperature probe (25), then the first through hole (5) is carried out Closed processes；

Step 3, air supply system and air inlet pipe (9) are carried out airtight test, air tight after close described gas bath calorstat case Door；

Step 4, gas chromatographicanalyzer (27) is connected to the upper end of escape pipe (10)；

Step 5, operation control computer (23), set the temperature upper limit in described coal sample tank (14), and transmission begins to warm up Control signal to controller module (21), controller module (21) controls computer heating control relay (26) and connects heating unit (12) current supply circuit, heating unit (12) begins to warm up；

Step 6, the connection of drying tube (17) and air source of the gas (16) is disconnected, and drying tube (17) is connected with Nitrogen source gases, In described coal sample tank (14), it is passed through nitrogen, treats the temperature value that the first temperature probe (24) and the second temperature probe (25) detect After Wen Ding, then the connection of drying tube (17) with Nitrogen source gases is disconnected, and drying tube (17) is connected with air source of the gas (16), open Beginning coal thermal insulation spontaneous combustion is tested；

In step 7, heating unit (12) heating process, described coal sample tank (14) internal temperature is entered by the first temperature probe (24) Row detection in real time, described coal sample tank (14) external temperature is detected by the second temperature probe (25) in real time, controller module (21) described coal sample tank (14) interior temperature signal the first temperature probe (24) detected and the second temperature probe (25) inspection Described coal sample tank (14) the external temperature signal measured carry out periodic samples and be transferred to control computer (23) show, And by the temperature upper limit phase comparison of the sampled value of described coal sample tank (14) interior temperature signal with setting, when sampled value is not up to During the temperature upper limit set, controller module (21) controls computer heating control relay (26) and is continuously turned on heating unit (12) Current supply circuit, heating unit (12) continuous heating, when sampled value reaches the temperature upper limit set, controller module (21) is controlled Computer heating control relay (26) processed disconnects the current supply circuit of heating unit (12), and heating unit (12) stops heating；Meanwhile, control Device module (21) records the temperature in described coal sample tank (14) and reaches to carry out coal sample (13) required for adiabatic spontaneous combustion experiment The temperature spot of test, it is required that the temperature in described coal sample tank (14) reaches that coal sample (13) carries out adiabatic spontaneous combustion experiment During the temperature spot tested, the gas component that coal sample (13) is produced by gas chromatographicanalyzer (27) detects.

The most in accordance with the method for claim 9, it is characterised in that: the temperature in the described coal sample tank (14) set in step 5 Degree higher limit is 200 DEG C～1000 DEG C, and coal sample (13) carries out in step 7 the temperature of the adiabatic required test of spontaneous combustion experiment Degree point is the temperature spot of the multiple of ten.