CN106290703B - Coal is insulated spontaneous combustion experimental provision and method - Google Patents
Coal is insulated spontaneous combustion experimental provision and method Download PDFInfo
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- CN106290703B CN106290703B CN201610877331.2A CN201610877331A CN106290703B CN 106290703 B CN106290703 B CN 106290703B CN 201610877331 A CN201610877331 A CN 201610877331A CN 106290703 B CN106290703 B CN 106290703B
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- 239000003245 coal Substances 0.000 title claims abstract description 127
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 59
- 230000002269 spontaneous effect Effects 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000000523 sample Substances 0.000 claims abstract description 146
- 238000010438 heat treatment Methods 0.000 claims abstract description 66
- 238000001035 drying Methods 0.000 claims abstract description 17
- 238000002474 experimental method Methods 0.000 claims abstract description 14
- 230000008569 process Effects 0.000 claims abstract description 11
- 239000007789 gas Substances 0.000 claims description 114
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 26
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 18
- 238000009413 insulation Methods 0.000 claims description 17
- 238000012360 testing method Methods 0.000 claims description 14
- 229910052742 iron Inorganic materials 0.000 claims description 13
- 229910052757 nitrogen Inorganic materials 0.000 claims description 9
- 229910001220 stainless steel Inorganic materials 0.000 claims description 7
- 239000010935 stainless steel Substances 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 238000011897 real-time detection Methods 0.000 claims description 4
- 239000010425 asbestos Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000004321 preservation Methods 0.000 claims description 3
- 229910052895 riebeckite Inorganic materials 0.000 claims description 3
- 230000000737 periodic effect Effects 0.000 claims description 2
- 230000006641 stabilisation Effects 0.000 claims 1
- 238000011105 stabilization Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001089 mineralizing effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000010183 spectrum analysis Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
- G01N31/12—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using combustion
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
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- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Molecular Biology (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The invention discloses a kind of coals to be insulated spontaneous combustion experimental provision, including gas bath insulating box, coal sample tank, air supply system and temperature control system；Gas bath insulating box includes gas bath constant temperature box body, gas bath insulating box chamber door, burner hearth, heating unit and equal Hot-air fan；Coal sample tank is made of tank body and cover, and tank body is made of internal layer tank body and outer layer tank body, and air inlet pipe is provided in the gap between internal layer tank body and outer layer tank body, the second through-hole and escape pipe are provided on cover；Temperature control system includes controller module, control computer, the first temperature probe, the second temperature probe and computer heating control relay；Air supply system includes sequentially connected air gas source, drying tube, pressure maintaining valve, gas mass flow meter and economizer bank；The invention also discloses a kind of coals to be insulated spontaneous combustion experimental method.It is convenient and at low cost that the present invention realizes, easy to use and operate, and temperature control is accurate, is capable of the evolution process of more accurately spontaneous combustion of simulated coal heating high temperature dot, practical.
Description
Technical field
The invention belongs to coal spontaneous combustion experimental technique fields, and in particular to a kind of coal insulation spontaneous combustion experimental provision and method.
Background technique
Coal spontaneous combustion fire is global disaster, seriously threatens human health, natural environment and Safety of Coal Mine Production, makes
At huge resources loss and environmental pollution.Coal spontaneous combustion fire mineralizing evolution process is complicated, oxidation heating-up time length, range
Extensively, high temperature fire source is hidden, and difficulty of governance is big, it has also become current problem urgently to be resolved.The spontaneous combustion tendency test of coal be coal from
Fire basis and the foundation of prevention and treatment.Existing coal ignitability's experimental apparatus for testing is various, mainly has large-scale spontaneous combustion of coal to test
Two kinds of device of platform, coal spontaneous combustion low temperature procedure elevated temperature test.But both testing stands have the shortcomings that its is intrinsic, certainly such as big moulded coal
The right ignition pilot plant testing time is long, and repeatability is poor；Coal spontaneous combustion low temperature procedure elevated temperature test device passively heats coal sample, it is difficult to
Accurate response Coal Self-ignition Process characteristic.Therefore, it is necessary to develop a kind of experimental rig for being avoided that above two experimental provision disadvantage.
Summary of the invention
In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is that providing a kind of structure letter
Single, novel design is rationally, realization is convenient and at low cost, easy to use and operate, temperature control is accurate, can more accurately simulate
The evolution process of coal spontaneous combustion heating high temperature dot, practical, using effect is good, real convenient for the coal insulation spontaneous combustion of popularization and use
Experiment device.
In order to solve the above technical problems, the technical solution adopted by the present invention is that: a kind of coal insulation spontaneous combustion experimental provision,
It is characterized by comprising gas bath insulating box and the coal sample tank in gas bath insulating box and for placing coal sample is set, and gas supply
System and temperature control system；
The gas bath insulating box includes the gas bath constant temperature box body of cubic shaped and is arranged in the gas bath insulating box case
The positive gas bath insulating box chamber door of body, is provided with first through hole at the top of the gas bath constant temperature box body, in the first through hole
It is provided with the plug for sealing first through hole, the institute after the gas bath insulating box chamber door and gas bath constant temperature box body closure
Stating gas bath insulating box housing interior volume is burner hearth, and bottom is provided with heating list on four sides and in burner hearth in the burner hearth
Member is provided with equal Hot-air fan at the geometric center position of four sides in the burner hearth, and the gas bath constant temperature box body is by position
Mirror surface iron sheet layer on the outside of the burner hearth and the stainless steel plate on the outside of mirror surface iron sheet layer are constituted, the mirror surface iron sheet layer with
Gap between stainless steel plate is vacuum heat-preserving chamber, and the vacuum heat-preserving is intracavitary filled with heat preservation asbestos；
The coal sample tank the tank body and cover of bolt airtight connection by being made up of, and the tank body is by internal layer tank body and outer layer
Tank body is constituted, and is provided with air inlet pipe in the gap between the internal layer tank body and outer layer tank body, the lower end of the air inlet pipe penetrates
Internal layer tank interior, the upper end of the air inlet pipe reach outside the gap between internal layer tank body and outer layer tank body, the cover
On be provided with the second through-hole and the escape pipe of internal layer tank interior, the upper end of the air inlet pipe and the upper end of escape pipe are protruded into lower end
It is pierced by from first through hole to outside the gas bath constant temperature box body；
The temperature control system includes controller module and control computer, and for temperature inside the coal sample tank
Spend the first temperature probe being measured in real time and the second thermometric for being measured in real time to the coal sample tank external temperature
Probe, first temperature probe pass through the second through-hole and protrude into internal layer tank interior, and second temperature probe is arranged described
In gas bath insulating box and it is located at outside the coal sample tank, the output of the output end and the second temperature probe of first temperature probe
End is connect with the input terminal of controller module, and the output of the controller module is terminated with computer heating control relay, described to add
Thermal control relay is connected in the current supply circuit of heating unit；
The air supply system includes sequentially connected air gas source, drying tube, pressure maintaining valve, gas mass flow meter and preheating
Pipe, the upper end of the air inlet pipe are connect with economizer bank, and the gas mass flow meter is connect with controller module, the controller
Communication circuit module is connected in module, the communication circuit module is connect with control computer.
Above-mentioned coal is insulated spontaneous combustion experimental provision, it is characterised in that: the gas bath insulating box chamber door by hinge with
The gas bath constant temperature box body is hinged.
Above-mentioned coal is insulated spontaneous combustion experimental provision, it is characterised in that: the shape of the first through hole is tubulose, described
The upper surface of first through hole is higher than the upper surface of the gas bath constant temperature box body.
Above-mentioned coal is insulated spontaneous combustion experimental provision, it is characterised in that: the equal Hot-air fan is tube-axial fan.
Above-mentioned coal is insulated spontaneous combustion experimental provision, it is characterised in that: the shape of the tank body is cylinder, described interior
Layer tank body and outer layer tank body and air inlet pipe and an air outlet pipe are made of red copper material.
Above-mentioned coal is insulated spontaneous combustion experimental provision, it is characterised in that: the air gas source is compressed air bottle or nothing
Oily air pump.
Above-mentioned coal is insulated spontaneous combustion experimental provision, it is characterised in that: first temperature probe and the second thermometric are visited
Head is PT-100 temp probe, and the heating unit is resistive heater, and the resistive heater is embedded in mirror surface iron sheet layer
On；The controller module is PLC module, and the computer heating control relay is EUV-10A solid-state relay.
Above-mentioned coal is insulated spontaneous combustion experimental provision, it is characterised in that: first temperature probe protrudes into internal layer tank body
Internal height is the half of internal layer tank body height.
The present invention also provides a kind of method and steps simply, it is convenient to realize, can more accurately spontaneous combustion of simulated coal heat up
The evolution process of high temperature dot, the coal that practical, using effect is good are insulated spontaneous combustion experimental method, which is characterized in that the party
Method the following steps are included:
Step 1: coal sample that is broken, having sieved is packed into internal layer tank interior, and the first temperature probe is passed through second and is led to
Internal layer tank interior is protruded into hole, then that the tank body and cover is closed；
Step 2: opening the gas bath insulating box chamber door, the coal sample tank is placed into the gas bath insulating box, is removed
For sealing the plug of first through hole, the upper end of air inlet pipe and the upper end of escape pipe are pierced by from first through hole to the gas bath
Outside constant temperature box body, the second temperature probe is set in the gas bath insulating box, and by the signal wire of the first temperature probe and
The signal wire of second temperature probe is pierced by from first through hole to outside the gas bath constant temperature box body, by the upper end of air inlet pipe and in advance
Heat pipe connection, the input terminal of the signal wire and controller module of the signal wire of the first temperature probe and the second temperature probe is connected
It connects, closed processes then is carried out to first through hole；
Step 3: carrying out airtight test to air supply system and air inlet pipe, the gas bath insulating box chamber door is closed after air tight；
Step 4: gas chromatographicanalyzer to be connected to the upper end of escape pipe；
Step 5: operation control computer, sets the temperature upper limit in the coal sample tank, and send the control begun to warm up
For signal processed to controller module, controller module controls the current supply circuit that computer heating control relay connects heating unit, and heating is single
Member is begun to warm up；
Step 6: the connection of drying tube and air gas source is disconnected, and drying tube is connect with Nitrogen source gases, toward the coal
Be passed through nitrogen in sample tank, after temperature value that the first temperature probe and the second temperature probe detect is stablized, then by drying tube with
The connection of Nitrogen source gases disconnects, and drying tube is connect with air gas source, starts coal insulation spontaneous combustion experiment；
Step 7: the first temperature probe examines the coal sample tank internal temperature in real time during heating unit heats
It surveys, the second temperature probe is measured in real time the coal sample tank external temperature, and controller module detects the first temperature probe
To the coal sample tank external temperature signal that detects of the coal sample tank interior temperature signal and the second temperature probe carry out week
Phase property sample and be transferred to control computer shown, and by the sampled value of the coal sample tank interior temperature signal and setting
Temperature upper limit is compared to pair, and when sampled value is not up to the temperature upper limit set, controller module controls computer heating control relay
Device is continuously turned on the current supply circuit of heating unit, heating unit continuous heating, when sampled value reaches the temperature upper limit of setting,
Controller module controls the current supply circuit that computer heating control relay disconnects heating unit, and heating unit stops heating；Meanwhile it controlling
The temperature that device module records in the coal sample tank, which reaches, carries out temperature spot to be tested needed for insulation spontaneous combustion is tested to coal sample,
Temperature in the coal sample tank reach to coal sample carry out insulation spontaneous combustion test needed for temperature spot to be tested when, gas phase color
The gas component that spectrum analysis instrument generates coal sample detects.
Above-mentioned method, it is characterised in that: the temperature upper limit in the coal sample tank set in step 5 as 200 DEG C~
1000 DEG C, the temperature spot for the multiple that temperature spot to be tested needed for insulation spontaneous combustion is tested is ten is carried out in step 7 to coal sample.
Compared with the prior art, the present invention has the following advantages:
1, the structure of coal insulation spontaneous combustion experimental provision of the present invention is simple, novel in design reasonable, and it is convenient and at low cost to realize.
2, coal insulation spontaneous combustion experimental provision of the present invention is easy to use and operate, can be by the temperature of spontaneous combustion of coal experiment
Degree be increased to 200 DEG C~1000 DEG C, can more accurately spontaneous combustion of simulated coal heating high temperature dot evolution process.
3, coal of the invention is insulated spontaneous combustion experimental provision, by the way that controller module, the first temperature probe, second is arranged
Temperature probe, heating unit and equal Hot-air fan, temperature control is accurate, is able to carry out the heating experiment of a variety of heating modes, can
The more accurately evolution process of spontaneous combustion of simulated coal heating high temperature dot.
4, the method and step of coal of the invention insulation spontaneous combustion experimental method is simple, and it is convenient to realize, the experiment number of record
According to can be used in establishing related coal spontaneous combustion model, the prevention and cure project of spontaneous combustion of coal is instructed.
5, of the invention practical, using effect is good, convenient for promoting the use of.
In conclusion novel design of the invention is rationally, it is convenient and at low cost to realize, easy to use and operate, temperature control
Accurately, can more accurately spontaneous combustion of simulated coal heating high temperature dot evolution process, practical, using effect is good, convenient for pushing away
It is wide to use.
Below by drawings and examples, technical scheme of the present invention will be described in further detail.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that coal of the present invention is insulated spontaneous combustion experimental provision.
Fig. 2 is the schematic block circuit diagram of temperature control system of the present invention.
Description of symbols:
1-gas bath insulating box；2-mirror surface iron sheet layers；3-stainless steel plates；
4-burner hearths；5-first through hole；6-vacuum heat-preserving chambers；
7-outer layer tank bodies；8-internal layer tank bodies；9-air inlet pipe；
10-escape pipes；11-the second through-hole；12-heating units；
13-coal samples；14-coal sample tanks；15-covers；
16-air gas sources；17-drying tubes；18-pressure maintaining valves；
19-gas mass flow meters；20-economizer banks；21-controller modules；
22-communication circuit modules；23-control computers；24-the first temperature probe；
25-the second temperature probe；26-computer heating control relays；27-gas chromatographicanalyzers；28-equal Hot-air fans.
Specific embodiment
As shown in Figure 1, coal of the invention is insulated spontaneous combustion experimental provision, including gas bath insulating box 1 and setting in gas bath
Coal sample tank 14 and air supply system and temperature control system in insulating box 1 and for placing coal sample 13；
The gas bath insulating box 1 includes the gas bath constant temperature box body of cubic shaped and is arranged in the gas bath insulating box case
Body positive gas bath insulating box chamber door is provided with first through hole 5, the first through hole 5 at the top of the gas bath constant temperature box body
On be provided with plug for sealing first through hole 5, after the gas bath insulating box chamber door and gas bath constant temperature box body closure
The gas bath insulating box housing interior volume be burner hearth 4, bottom is respectively provided on four sides and in burner hearth 4 in the burner hearth 4
There is heating unit 12, be provided with equal Hot-air fan 28 in the burner hearth 4 at the geometric center position of four sides, the gas bath is permanent
Stainless steel plate 3 of the incubator cabinet by being located at the mirror surface iron sheet layer 2 in 4 outside of burner hearth and positioned at 2 outside of mirror surface iron sheet layer is constituted,
Gap between the mirror surface iron sheet layer 2 and stainless steel plate 3 is vacuum heat-preserving chamber 6, filled with heat preservation in the vacuum heat-preserving chamber 6
Asbestos；When it is implemented, the aperture of the first through hole 5 is 30mm, the length of the burner hearth 4 is 800mm, the burner hearth 4
Width is 800mm, and the height of the burner hearth 4 is 1400mm；The length of the gas bath constant temperature box body is 1200mm, the gas bath
The width of constant temperature box body is 1200mm, and the height of the gas bath constant temperature box body is 1400mm；
The coal sample tank 14 tank body and cover 15 of bolt airtight connection by being made up of, and the tank body is by internal layer tank body 8
It is constituted with outer layer tank body 7, is provided with air inlet pipe 9, the air inlet pipe 9 in the gap between the internal layer tank body 8 and outer layer tank body 7
Lower end penetrate inside internal layer tank body 8, the upper end of the air inlet pipe 9 reaches the gap between internal layer tank body 8 and outer layer tank body 7
Outside, is provided with the second through-hole 11 on the cover 15 and escape pipe 10 inside internal layer tank body 8, the air inlet pipe are protruded into lower end
9 upper end and the upper end of escape pipe 10 are pierced by from first through hole 5 to outside the gas bath constant temperature box body；
In conjunction with Fig. 2, the temperature control system includes controller module 21 and control computer 23, and for described
The first temperature probe 24 and be used to carry out 14 external temperature of coal sample tank that 14 internal temperature of coal sample tank is measured in real time
Second temperature probe 25 of real-time detection, first temperature probe 24 pass through the second through-hole 11 and protrude into inside internal layer tank body 8, institute
It states the second temperature probe 25 to be arranged in the gas bath insulating box 1 and be located at outside the coal sample tank 14, first thermometric is visited
The output end of first 24 output end and the second temperature probe 25 is connect with the input terminal of controller module 21, the controller mould
The output of block 21 is terminated with computer heating control relay 26, and the power supply that the computer heating control relay 26 is connected on heating unit 12 is returned
Lu Zhong；
The air supply system includes sequentially connected air gas source 16, drying tube 17, pressure maintaining valve 18, gas mass flow meter
19 and economizer bank 20, the upper end of the air inlet pipe 9 connect with economizer bank 20, the gas mass flow meter 19 and controller module
21 connect, and communication circuit module 22, the communication circuit module 22 and control computer 23 are connected on the controller module 21
Connection.By the way that economizer bank 20 is arranged, it can be realized being fully warmed-up when air enters coal sample tank 14 and reach flat with environment temperature
Weighing apparatus；When it is implemented, the economizer bank 20 is made of copper pipe.
In the present embodiment, the gas bath insulating box chamber door is hinged by hinge and the gas bath constant temperature box body.It is specific real
Shi Shi, the gas bath constant temperature box body are made by welding.
In the present embodiment, as shown in Figure 1, the shape of the first through hole 5 is tubulose, the upper surface of the first through hole 5
Higher than the upper surface of the gas bath constant temperature box body.
In the present embodiment, the equal Hot-air fan 28 is tube-axial fan.Pass through the geometric center of four sides in burner hearth 4
Equal Hot-air fan 28 is set at position, can guarantee that the temperature in gas bath insulating box 1 is uniform.
In the present embodiment, the shape of the tank body is cylinder, the internal layer tank body 8 and outer layer tank body 7 and air inlet pipe
9 and escape pipe 10 be made of red copper material.
In the present embodiment, the air gas source 16 is that compressed air bottle or oil-free air pump.
In the present embodiment, first temperature probe 24 and the second temperature probe 25 are PT-100 temp probe, described
Heating unit 12 is resistive heater, and the resistive heater is embedded on mirror surface iron sheet layer 2；The controller module 21 is
PLC module, the computer heating control relay 26 are EUV-10A solid-state relay.When it is implemented, the liter of the resistive heater
Warm speed is 0.01 DEG C/min~20 DEG C/min, and the temperature stability of the resistive heater is ± 0.1 DEG C.The PT-100 temperature
The precision of degree probe is ± 0.1+0.0017T, is packed outside the PT-100 temp probe with polytetrafluoroethylene (PTFE).
In the present embodiment, as shown in Figure 1, it is internal layer that first temperature probe 24, which protrudes into the height inside internal layer tank body 8,
The half of 8 height of tank body.First temperature probe 24 is set in this way, more accurate 14 internal temperature of coal sample tank can be measured.
Coal of the invention is insulated spontaneous combustion experimental method, comprising the following steps:
Step 1: coal sample 13 that is broken, having sieved is packed into inside internal layer tank body 8, and the first temperature probe 24 is passed through
Second through-hole 11 protrudes into inside internal layer tank body 8, then that the tank body and cover 15 is closed；
Step 2: opening the gas bath insulating box chamber door, the coal sample tank 14 is placed into the gas bath insulating box 1,
Remove the plug for sealing first through hole 5, the upper end of air inlet pipe 9 and the upper end of escape pipe 10 are pierced by from first through hole 5
To outside the gas bath constant temperature box body, the second temperature probe 25 is set in the gas bath insulating box 1, and the first thermometric is visited
The signal wire of first 24 signal wire and the second temperature probe 25 is pierced by from first through hole 5 to outside the gas bath constant temperature box body,
The upper end of air inlet pipe 9 is connect with economizer bank 20, by the signal of the signal wire of the first temperature probe 24 and the second temperature probe 25
Line is connect with the input terminal of controller module 21, then carries out closed processes to first through hole 5；
Step 3: carrying out airtight test to air supply system and air inlet pipe 9, the gas bath insulating box case is closed after air tight
Door；
Step 4: gas chromatographicanalyzer 27 to be connected to the upper end of escape pipe 10；
Step 5: operation control computer 23, sets the temperature upper limit in the coal sample tank 14, and send and begin to warm up
Control signal to controller module 21, controller module 21 controls the power supply that computer heating control relay 26 connects heating unit 12
Circuit, heating unit 12 are begun to warm up；
Step 6: the connection of drying tube 17 and air gas source 16 is disconnected, and drying tube 17 is connect with Nitrogen source gases, it is past
It is passed through nitrogen in the coal sample tank 14, after the temperature value that the first temperature probe 24 and the second temperature probe 25 detect is stablized,
The connection of drying tube 17 and Nitrogen source gases is disconnected again, and drying tube 17 is connect with air gas source 16, starts coal and is insulated spontaneous combustion
It is under fire and tests；
Step 7: the first temperature probe 24 carries out 14 internal temperature of coal sample tank in 12 heating process of heating unit
Real-time detection, the second temperature probe 25 are measured in real time 14 external temperature of coal sample tank, and controller module 21 is to first
The coal sample tank that 14 interior temperature signal of coal sample tank and the second temperature probe 25 that temperature probe 24 detects detect
14 external temperature signals carry out periodic samples and are transferred to control computer 23 being shown, and will be inside the coal sample tank 14
The sampled value of temperature signal is compared with the temperature upper limit of setting pair, when sampled value is not up to the temperature upper limit set, control
Device module 21 processed controls the current supply circuit that computer heating control relay 26 is continuously turned on heating unit 12, and heating unit 12 persistently adds
Heat, when sampled value reaches the temperature upper limit of setting, controller module 21 controls computer heating control relay 26 and disconnects heating list
The current supply circuit of member 12, heating unit 12 stop heating；Meanwhile the temperature that controller module 21 records in the coal sample tank 14 reaches
Temperature spot to be tested needed for insulation spontaneous combustion is tested is carried out to coal sample 13, the temperature in the coal sample tank 14 reaches pair
When coal sample 13 carries out temperature spot to be tested needed for insulation spontaneous combustion is tested, gas chromatographicanalyzer 27 generates coal sample 13
Gas component is detected.When it is implemented, the gas chromatographicanalyzer 27 selects SP2120 mine drainage gas to analyze dedicated gas phase
Chromatograph 27, can be to O2、N2、CO、CO2、CH4、C2H6、C2H4、C2H2Separation and concentration inspection are carried out Deng kind of gas componant
It surveys；The data that the gas chromatographicanalyzer 27 records can be used in judging the combustion case of coal sample 13, and establish related coal certainly
Model is fired, the prevention and cure project of spontaneous combustion of coal is instructed.
In the present embodiment, the temperature upper limit in the coal sample tank 14 set in step 5 is 200 DEG C~1000 DEG C, step
The temperature spot for the multiple that temperature spot to be tested needed for insulation spontaneous combustion is tested is ten is carried out in rapid seven to coal sample 13.
The above is only presently preferred embodiments of the present invention, is not intended to limit the invention in any way, it is all according to the present invention
Technical spirit any simple modification to the above embodiments, change and equivalent structural changes, still fall within skill of the present invention
In the protection scope of art scheme.
Claims (8)
1. a kind of coal is insulated spontaneous combustion experimental provision, it is characterised in that: including gas bath insulating box (1) and be arranged in gas bath constant temperature
Coal sample tank (14) and air supply system and temperature control system in case (1) and for placing coal sample (13)；
The gas bath insulating box (1) includes the gas bath constant temperature box body of cubic shaped and is arranged in the gas bath constant temperature box body
Positive gas bath insulating box chamber door is provided with first through hole (5), the first through hole at the top of the gas bath constant temperature box body
(5) plug for sealing first through hole (5) is provided on, the gas bath insulating box chamber door is closed with the gas bath constant temperature box body
The gas bath insulating box housing interior volume after conjunction is burner hearth (4), in the burner hearth (4) on four sides and in burner hearth (4)
Bottom is provided with heating unit (12), is provided with equal hot wind at the geometric center position of four sides in the burner hearth (4)
It fans (28), the gas bath constant temperature box body is by being located at the mirror surface iron sheet layer (2) on the outside of the burner hearth (4) and being located at mirror surface iron sheet layer
(2) stainless steel plate (3) on the outside of is constituted, and the gap between the mirror surface iron sheet layer (2) and stainless steel plate (3) is vacuum heat-preserving chamber
(6), filled with heat preservation asbestos in the vacuum heat-preserving chamber (6)；
The coal sample tank (14) the tank body and cover (15) of bolt airtight connection by being made up of, and the tank body is by internal layer tank body
(8) it is constituted with outer layer tank body (7), is provided with air inlet pipe (9) in the gap between the internal layer tank body (8) and outer layer tank body (7),
It is internal that the lower end of the air inlet pipe (9) penetrates internal layer tank body (8), the upper end of the air inlet pipe (9) reach internal layer tank body (8) and
Outside gap between outer layer tank body (7), the second through-hole (11) is provided on the cover (15) and internal layer tank body is protruded into lower end
(8) internal escape pipe (10), the upper end of the air inlet pipe (9) and the upper end of escape pipe (10) are pierced by from first through hole (5)
To outside the gas bath constant temperature box body；
The temperature control system includes controller module (21) and control computer (23), and for the coal sample tank
(14) the first temperature probe (24) and be used to carry out coal sample tank (14) external temperature that internal temperature is measured in real time
The second temperature probe (25) of real-time detection, first temperature probe (24) pass through the second through-hole (11) and protrude into internal layer tank body
(8) internal, the second temperature probe (25) setting is in the gas bath insulating box (1) and is located at the coal sample tank (14) outside
The output end of portion, the output end of first temperature probe (24) and the second temperature probe (25) with controller module (21)
Input terminal connection, the output of the controller module (21) are terminated with computer heating control relay (26), the computer heating control relay
Device (26) is connected in the current supply circuit of heating unit (12)；
The air supply system includes sequentially connected air gas source (16), drying tube (17), pressure maintaining valve (18), gas mass flow
Meter (19) and economizer bank (20), the upper end of the air inlet pipe (9) are connect with economizer bank (20), the gas mass flow meter (19)
It connect, is connected to communication circuit module (22) on the controller module (21), the telecommunication circuit mould with controller module (21)
Block (22) is connect with control computer (23)；
First temperature probe (24) and the second temperature probe (25) are PT-100 temp probe, the heating unit (12)
For resistive heater, the resistive heater is embedded on mirror surface iron sheet layer (2)；The controller module (21) is PLC module,
The computer heating control relay (26) is EUV-10A solid-state relay；
First temperature probe (24) protrudes into the half that the internal height of internal layer tank body (8) is internal layer tank body (8) height.
2. coal described in accordance with the claim 1 is insulated spontaneous combustion experimental provision, it is characterised in that: the gas bath insulating box chamber door
It is hinged by hinge and the gas bath constant temperature box body.
3. coal described in accordance with the claim 1 is insulated spontaneous combustion experimental provision, it is characterised in that: the first through hole (5)
Shape is tubulose, and the upper surface of the first through hole (5) is higher than the upper surface of the gas bath constant temperature box body.
4. coal described in accordance with the claim 1 is insulated spontaneous combustion experimental provision, it is characterised in that: the equal Hot-air fan (28) is
Tube-axial fan.
5. coal described in accordance with the claim 1 is insulated spontaneous combustion experimental provision, it is characterised in that: the shape of the tank body is circle
Cylindricality, the internal layer tank body (8) and outer layer tank body (7) and air inlet pipe (9) and escape pipe (10) are made of red copper material.
6. coal described in accordance with the claim 1 is insulated spontaneous combustion experimental provision, it is characterised in that: the air gas source (16) is
Compressed air bottle or oil-free air pump.
7. a kind of method for carrying out coal insulation spontaneous combustion experiment using experimental provision as described in claim 1, feature exist
In, method includes the following steps:
Step 1: it is internal that coal sample (13) that is broken, having sieved is packed into internal layer tank body (8), and the first temperature probe (24) is worn
It crosses the second through-hole (11) and protrudes into internal layer tank body (8) inside, it is then that the tank body and cover (15) is closed；
Step 2: opening the gas bath insulating box chamber door, the coal sample tank (14) is placed into the gas bath insulating box (1),
Remove the plug for sealing first through hole (5), by the upper end of air inlet pipe (9) and the upper end of escape pipe (10) from first through hole
(5) it is pierced by outside the gas bath constant temperature box body, the second temperature probe (25) is set in the gas bath insulating box (1), and
The signal wire of the signal wire of first temperature probe (24) and the second temperature probe (25) is pierced by from first through hole (5) to the gas
It bathes outside constant temperature box body, the upper end of air inlet pipe (9) is connect with economizer bank (20), by the signal wire of the first temperature probe (24)
It connect with the signal wire of the second temperature probe (25) with the input terminal of controller module (21), then first through hole (5) is carried out
Closed processes；
Step 3: carrying out airtight test to air supply system and air inlet pipe (9), the gas bath insulating box case is closed after air tight
Door；
Step 4: gas chromatographicanalyzer (27) to be connected to the upper end of escape pipe (10)；
Step 5: operation control computer (23), sets the temperature upper limit in the coal sample tank (14), and send and begin to warm up
Control signal give controller module (21), controller module (21) control computer heating control relay (26) connect heating unit
(12) current supply circuit, heating unit (12) are begun to warm up；
Step 6: the connection of drying tube (17) and air gas source (16) is disconnected, and drying tube (17) is connect with Nitrogen source gases,
It is passed through nitrogen in the coal sample tank (14), the temperature value detected to the first temperature probe (24) and the second temperature probe (25)
After stabilization, then by the connection disconnection of drying tube (17) and Nitrogen source gases, and drying tube (17) is connect with air gas source (16), is opened
Beginning coal is insulated spontaneous combustion experiment；
Step 7: in heating unit (12) heating process, the first temperature probe (24) to coal sample tank (14) internal temperature into
Row real-time detection, the second temperature probe (25) are measured in real time coal sample tank (14) external temperature, controller module
(21) coal sample tank (14) interior temperature signal and the second temperature probe (25) detected to the first temperature probe (24) is examined
Coal sample tank (14) the external temperature signal that measures carries out periodic samples and is transferred to control computer (23) being shown,
And by the sampled value of coal sample tank (14) interior temperature signal compared with the temperature upper limit of setting pair, when sampled value is not up to
When the temperature upper limit of setting, controller module (21) control computer heating control relay (26) is continuously turned on heating unit (12)
Current supply circuit, heating unit (12) continuous heating, when sampled value reaches the temperature upper limit of setting, controller module (21) control
Computer heating control relay (26) processed disconnects the current supply circuit of heating unit (12), and heating unit (12) stops heating；Meanwhile it controlling
The temperature that device module (21) records in the coal sample tank (14), which reaches, carries out required for insulation spontaneous combustion experiment coal sample (13)
The temperature spot of test reaches required for carrying out insulation spontaneous combustion experiment to coal sample (13) in the temperature in the coal sample tank (14)
When the temperature spot of test, the gas component that gas chromatographicanalyzer (27) generates coal sample (13) is detected.
8. according to the method for claim 7, it is characterised in that: the temperature in the coal sample tank (14) set in step 5
Upper limit value is 200 DEG C~1000 DEG C, carries out temperature to be tested needed for insulation spontaneous combustion is tested to coal sample (13) in step 7
The temperature spot for the multiple that point is ten.
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Inventor after: Liu Wenyong Inventor after: Wen Hu Inventor after: Guo Jun Inventor after: Jin Yongfei Inventor before: Liu Wenyong Inventor before: Jin Yongfei Inventor before: Guo Jun Inventor before: Zheng Xuezhao Inventor before: Xu Yanhui Inventor before: Wen Hu |
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Effective date of registration: 20231123 Address after: Room 049, F2001, 20th Floor, Building 4-A, Xixian Financial Port, Fengdong New City Energy Jinmao District, Xixian New District, Xi'an City, Shaanxi Province, 710086 Patentee after: Shaanxi Jinchuang ante Technology Co.,Ltd. Address before: 710054 No. 58, Yanta Road, Shaanxi, Xi'an Patentee before: XI'AN University OF SCIENCE AND TECHNOLOGY |