CN106290703A - Coal thermal insulation spontaneous combustion experimental provision and method - Google Patents
Coal thermal insulation spontaneous combustion experimental provision and method Download PDFInfo
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- CN106290703A CN106290703A CN201610877331.2A CN201610877331A CN106290703A CN 106290703 A CN106290703 A CN 106290703A CN 201610877331 A CN201610877331 A CN 201610877331A CN 106290703 A CN106290703 A CN 106290703A
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- 239000003245 coal Substances 0.000 title claims abstract description 131
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 63
- 230000002269 spontaneous effect Effects 0.000 title claims abstract description 60
- 238000009413 insulation Methods 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000000523 sample Substances 0.000 claims abstract description 145
- 238000010438 heat treatment Methods 0.000 claims abstract description 60
- 238000002474 experimental method Methods 0.000 claims abstract description 19
- 238000001035 drying Methods 0.000 claims abstract description 17
- 230000008569 process Effects 0.000 claims abstract description 11
- 239000007789 gas Substances 0.000 claims description 113
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 26
- 238000012360 testing method Methods 0.000 claims description 19
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 18
- 229910052742 iron Inorganic materials 0.000 claims description 13
- 229910052757 nitrogen Inorganic materials 0.000 claims description 9
- 230000007797 corrosion Effects 0.000 claims description 7
- 238000005260 corrosion Methods 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
- 238000001514 detection method Methods 0.000 claims description 4
- 239000010425 asbestos Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 229910052895 riebeckite Inorganic materials 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 2
- 238000007689 inspection Methods 0.000 claims description 2
- 230000000737 periodic effect Effects 0.000 claims description 2
- 230000005855 radiation Effects 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- 230000000694 effects Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000036541 health Effects 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
- 229950000845 politef Drugs 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000002791 soaking 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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- Combustion & Propulsion (AREA)
- Molecular Biology (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
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
Technical field
The invention belongs to coal spontaneous combustion experimental technique field, be specifically related to a kind of coal thermal insulation spontaneous combustion experimental provision and side
Method.
Background technology
Coal spontaneous combustion fire is global disaster, and serious threat human health, natural environment and Safety of Coal Mine Production, made
Huge resources loss and environmental pollution are become.Coal spontaneous combustion fire mineralizing evolution process is complicated, aoxidizes heating-up time length, scope
Extensively, high temperature burning things which may cause a fire disaster hidden, difficulty of governance is big, it has also become a difficult problem the most urgently to be resolved hurrily.The spontaneous combustion tendency test of coal be coal from
The basis of combustion preventing and treating and foundation.Existing coal ignitability's experimental apparatus for testing is various, mainly has large-scale spontaneous combustion of coal to test
Platform, two kinds of coal spontaneous combustion low temperature procedure elevated temperature test device.But both testing stands have the shortcoming that it is intrinsic, such as big moulded coal certainly
So the ignition pilot plant testing time is long, repeatable poor；The heating passive to coal sample of coal spontaneous combustion low temperature procedure elevated temperature test device, difficult
With accurate response Coal Self-ignition Process characteristic.Therefore, it is necessary to develop a kind of test being avoided that above two experimental provision shortcoming
Device.
Summary of the invention
The technical problem to be solved is for above-mentioned deficiency of the prior art, it is provided that a kind of structure letter
Single, novel in design rationally, realize that convenient and low cost, use be easy to operate, temperature controls accurately, can more accurately simulate
The evolution process of coal spontaneous combustion intensification high temperature dot, practical, using effect good, the coal thermal insulation spontaneous combustion being easy to promote the use of is real
Experiment device.
For solving above-mentioned technical problem, the technical solution used in the present invention is: a kind of coal thermal insulation spontaneous combustion experimental provision,
It is characterized in that: in including gas bath calorstat and being arranged on gas bath calorstat and for placing the coal sample tank of coal sample, and supply
System and temperature control system；
Described gas bath calorstat includes the gas bath calorstat casing of cubic shaped and is arranged on described gas bath calorstat case
The gas bath calorstat chamber door in body front, the top of described gas bath calorstat casing is provided with the first through hole, on described first through hole
It is provided with the institute after the plug for sealing the first through hole, described gas bath calorstat chamber door and described gas bath calorstat casing close
Stating gas bath calorstat housing interior volume is burner hearth, is provided with heats list with burner hearth inner bottom part in described burner hearth on four sides
Unit, in described burner hearth, the geometric center position of four sides is provided with equal Hot-air fan, and described gas bath calorstat casing is by position
Minute surface iron sheet layer outside described burner hearth and be positioned at corrosion resistant plate outside minute surface iron sheet layer and constitute, described minute surface iron sheet layer with
Gap between corrosion resistant plate is vacuum heat-preserving chamber, and described vacuum heat-preserving intracavity is filled with insulation asbestos；
Described coal sample tank is formed by by tank body and the cover of bolt airtight connection, and described 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 described internal layer tank body and outer layer tank body, and the lower end of described air inlet pipe penetrates
Internal layer tank interior, the upper end of described air inlet pipe reaches outside the gap between internal layer tank body and outer layer tank body, described cover
On be provided with the second through hole and the escape pipe of internal layer tank interior, the upper end of described air inlet pipe and the upper end of escape pipe are stretched in lower end
All pass outside described gas bath calorstat casing from the first through hole；
Described temperature control system includes controller module and controls computer, and for temperature internal to described coal sample tank
Spend the first temperature probe detected in real time and for the second thermometric that described coal sample tank external temperature is detected in real time
Probe, described first temperature probe stretches into internal layer tank interior through the second through hole, and described second temperature probe is arranged on described
Gas bath calorstat is interior and is positioned at outside described coal sample tank, the outfan of described first temperature probe and the output of the second temperature probe
End be all connected with the input of controller module, the outfan of described controller module is connected to computer heating control relay, described in add
Thermal control relay is connected in the current supply circuit of heating unit；
Described air supply system includes air source of the gas, drying tube, pressure maintaining valve, mass-flow gas meter and the preheating being sequentially connected with
Pipe, the upper end of described air inlet pipe is connected with economizer bank, and described mass-flow gas meter is connected with controller module, described controller
Being connected to communication circuit module in module, described communication circuit module is connected with controlling computer.
Above-mentioned coal thermal insulation spontaneous combustion experimental provision, it is characterised in that: described gas bath calorstat chamber door by hinge with
Described gas bath calorstat casing is hinged.
Above-mentioned coal thermal insulation spontaneous combustion experimental provision, it is characterised in that: described first through hole be shaped as tubulose, described
The upper surface of the first through hole is higher than the upper surface of described gas bath calorstat casing.
Above-mentioned coal thermal insulation spontaneous combustion experimental provision, it is characterised in that: described equal Hot-air fan is tube-axial fan.
Above-mentioned coal thermal insulation spontaneous combustion experimental provision, it is characterised in that: described tank body cylindrically shaped, described in
Layer tank body and outer layer tank body, and air inlet pipe and escape pipe made by red copper material.
Above-mentioned coal thermal insulation spontaneous combustion experimental provision, it is characterised in that: described air source of the gas is compressed air bottle or nothing
Oil air pump.
Above-mentioned coal thermal insulation spontaneous combustion experimental provision, it is characterised in that: described first temperature probe and the second thermometric are visited
Head is PT-100 temperature probe, and described heating unit is resistive heater, and described resistive heater is embedded in minute surface iron sheet layer
On；Described controller module is PLC module, and described computer heating control relay is EUV-10A solid-state relay.
Above-mentioned coal thermal insulation spontaneous combustion experimental provision, it is characterised in that: described first temperature probe stretches into internal layer tank body
The internal half that height is internal layer tank body height.
Present invention also offers that a kind of method step is simple, it is convenient to realize, can more accurately heat up by spontaneous combustion of simulated coal
The evolution process of high temperature dot, the coal thermal insulation spontaneous combustion experimental technique that practical, using effect is good, it is characterised in that the party
Method comprises the following steps:
Step one, the coal sample loading internal layer tank interior that will crush, sieved, and the first temperature probe is led to through second
Internal layer tank interior is stretched in hole, then by airtight to described tank body and cover；
Step 2, open described gas bath calorstat chamber door, described coal sample tank is placed in described gas bath calorstat, removes
For sealing the plug of the first through hole, the upper end of air inlet pipe and the upper end of escape pipe are all passed described gas bath from the first through hole
Outside calorstat casing, the second temperature probe is set in described gas bath calorstat, and by the holding wire of the first temperature probe and
The holding wire of the second temperature probe passes outside described gas bath calorstat casing from the first through hole, by the upper end of air inlet pipe with pre-
Heat pipe connects, by the input of the holding wire of the first temperature probe and the holding wire of the second temperature probe and controller module even
Connect, then the first through hole is carried out closed processes；
Step 3, air supply system and air inlet pipe are carried out airtight test, air tight after close described gas bath calorstat case
Door；
Step 4, gas chromatographicanalyzer is connected to the upper end of escape pipe；
Step 5, operation control computer, set the temperature upper limit in described coal sample tank, and send the control begun to warm up
Signal processed is to controller module, and controller module controls computer heating control relay and connects the current supply circuit of heating unit, and heating is single
Unit begins to warm up；
Step 6, the connection of drying tube and air source of the gas is disconnected, and drying tube is connected with Nitrogen source gases, past described coal
Be passed through nitrogen in sample tank, after the temperature value detected until the first temperature probe and the second temperature probe is stable, then by drying tube with
The connection of Nitrogen source gases disconnects, and is connected with air source of the gas by drying tube, starts the experiment of coal thermal insulation spontaneous combustion；
During step 7, heating unit heats, described coal sample tank internal temperature is examined by the first temperature probe in real time
Surveying, described coal sample tank external temperature is detected by the second temperature probe in real time, and the first temperature probe is detected by controller module
To described coal sample tank interior temperature signal and the described coal sample tank external temperature signal that detects of the second temperature probe carry out week
Phase property is sampled and is transferred to control computer and shows, and by the sampled value of described coal sample tank interior temperature signal and setting
Temperature upper limit phase comparison, when the temperature upper limit that sampled value not up to sets, 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 set,
Controller module controls computer heating control relay and disconnects the current supply circuit of heating unit, and heating unit stops heating；Meanwhile, control
Temperature in coal sample tank described in device module record reaches to carry out coal sample the temperature spot of the adiabatic required test of spontaneous combustion experiment,
When temperature in described coal sample tank reaches the temperature spot that coal sample carries out the adiabatic required test of spontaneous combustion experiment, gas phase color
The gas component that coal sample is produced by spectrometer detects.
Above-mentioned method, it is characterised in that: the temperature upper limit in the described coal sample tank set in step 5 as 200 DEG C～
1000 DEG C, step 7 carries out to coal sample the temperature of the multiple that temperature spot is ten of the adiabatic required test of spontaneous combustion experiment
Point.
The present invention compared with prior art has the advantage that
1, the simple in construction of coal thermal insulation spontaneous combustion experimental provision of the present invention, novel in design reasonable, it is achieved convenient and cost
Low.
2, the use of coal thermal insulation spontaneous combustion experimental provision of the present invention is easy to operate, it is possible to the temperature tested by spontaneous combustion of coal
Degree brings up to 200 DEG C～1000 DEG C, it is possible to the more accurately evolution process of spontaneous combustion of simulated coal intensification high temperature dot.
3, the coal thermal insulation spontaneous combustion experimental provision of the present invention, by arrange controller module, the first temperature probe, second
Temperature probe, heating unit and equal Hot-air fan, temperature controls accurately, it is possible to carry out the intensification experiment of multiple heating mode, it is possible to
The more accurately evolution process of spontaneous combustion of simulated coal intensification high temperature dot.
4, the method step of the coal thermal insulation spontaneous combustion experimental technique of the present invention is simple, it is achieved convenient, the experiment number of record
Set up relevant coal spontaneous combustion model according to can be used in, instruct the prevention and cure project of spontaneous combustion of coal.
5, the present invention's is practical, and using effect is good, it is simple to promote the use of.
In sum, the present invention's is novel in design reasonable, it is achieved 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, using effect is good, it is simple to push away
Wide use.
Below by drawings and Examples, technical scheme is described in further detail.
Accompanying drawing explanation
Fig. 1 is the structural representation of coal thermal insulation spontaneous combustion experimental provision of the present invention.
Fig. 2 is the schematic block circuit diagram of temperature control system of the present invention.
Description of reference numerals:
1 gas bath calorstat；2 minute surface iron sheet layers；3 corrosion resistant plates；
4 burner hearths；5 first through holes；6 vacuum heat-preserving chambeies；
7 outer layer tank bodies；8 internal layer tank bodies；9 air inlet pipe；
10 escape pipes；11 second through holes；12 heating units；
13 coal samples；14 coal sample tanks；15 covers；
16 air sources of the gas；17 drying tubes；18 pressure maintaining valves；
19 mass-flow gas meters；20 economizer banks；21 controller modules；
22 communication circuit modules；23 control computer；24 first temperature probes；
25 second temperature probes；26 computer heating control relays；27 gas chromatographicanalyzers；28 soaking
Fan.
Detailed description of the invention
As it is shown in figure 1, the coal thermal insulation spontaneous combustion experimental provision of the present invention, including gas bath calorstat 1 be arranged on gas bath
In calorstat 1 and 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 case
The gas bath calorstat chamber door in body front, the top of described gas bath calorstat casing is provided with the first through hole 5, described first through hole 5
On be provided with the plug for sealing the first through hole 5, after described gas bath calorstat chamber door closes with described gas bath calorstat casing
Described gas bath calorstat housing interior volume be burner hearth 4, on interior four sides of described burner hearth 4 and burner hearth 4 inner bottom part be respectively provided with
Having heating unit 12, the geometric center position of interior four sides of described burner hearth 4 to be provided with equal Hot-air fan 28, described gas bath is permanent
Incubator casing is by the minute surface iron sheet layer 2 being positioned at outside described burner hearth 4 and is positioned at the corrosion resistant plate 3 outside minute surface iron sheet layer 2 and constitutes,
Gap between described minute surface iron sheet layer 2 and corrosion resistant plate 3 is vacuum heat-preserving chamber 6, is filled with insulation in described vacuum heat-preserving chamber 6
Asbestos；When being embodied as, the aperture of described first through hole 5 is 30mm, a length of 800mm of described burner hearth 4, described burner hearth 4
Width is 800mm, and the height of described burner hearth 4 is 1400mm；The a length of 1200mm of described gas bath calorstat casing, described gas bath
The width of calorstat casing is 1200mm, and the height of described gas bath calorstat casing is 1400mm；
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, described air inlet pipe 9
To penetrate internal layer tank body 8 internal in lower end, the upper end of described air inlet pipe 9 reaches the gap between internal layer tank body 8 and outer layer tank body 7
Outside, described cover 15 is provided with the second through hole 11 and the escape pipe 10 within internal layer tank body 8, described air inlet pipe are stretched in lower end
The upper end of 9 and the upper end of escape pipe 10 all pass outside described gas bath calorstat casing from the first through hole 5；
In conjunction with Fig. 2, described temperature control system includes controller module 21 and controls computer 23, and for described
The first temperature probe 24 that coal sample tank 14 internal temperature detects in real time and for described coal sample tank 14 external temperature is carried out
Second temperature probe 25 of detection in real time, it is internal that described first temperature probe 24 stretches into internal layer tank body 8 through the second through hole 11, institute
Stating in the second temperature probe 25 is arranged on described gas bath calorstat 1 and be positioned at described coal sample tank 14 outside, described first thermometric is visited
The outfan of 24 and the outfan of the second temperature probe 25 all inputs with controller module 21 are connected, described controller mould
The outfan of block 21 is connected to computer heating control relay 26, and the power supply that described computer heating control relay 26 is connected on heating unit 12 is returned
Lu Zhong；
Air source of the gas 16 that described air supply system includes being sequentially connected with, drying tube 17, pressure maintaining valve 18, mass-flow gas 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 and controller module
21 connect, and described controller module 21 is connected to communication circuit module 22, described communication circuit module 22 and control computer 23
Connect.By arranging economizer bank 20, it is possible to realize being fully warmed-up and reaching flat with ambient temperature when air enters coal sample tank 14
Weighing apparatus；When being embodied as, described economizer bank 20 is made up of copper pipe.
In the present embodiment, described gas bath calorstat chamber door is hinged with described gas bath calorstat casing by hinge.Concrete real
Shi Shi, described gas bath calorstat casing is made by the way of welding.
In the present embodiment, as it is shown in figure 1, described first through hole 5 be shaped as tubulose, the upper surface of described first through hole 5
Upper surface higher than described gas bath calorstat casing.
In the present embodiment, described equal Hot-air fan 28 is tube-axial fan.By the geometric center in interior four sides of burner hearth 4
Position arranges equal Hot-air fan 28, it is possible to ensure the homogeneous temperature in gas bath calorstat 1.
In the present embodiment, described tank body cylindrically shaped, described internal layer tank body 8 and outer layer tank body 7, and air inlet pipe
9 and escape pipe 10 made by red copper material.
In the present embodiment, described air source of the gas 16 is compressed air bottle or oil-free air pump.
In the present embodiment, described first temperature probe 24 and the second temperature probe 25 are PT-100 temperature probe, described
Heating unit 12 is resistive heater, and described resistive heater is embedded on minute surface iron sheet layer 2；Described controller module 21 is
PLC module, described computer heating control relay 26 is EUV-10A solid-state relay.When being embodied as, the liter of described resistive heater
Temperature speed is 0.01 DEG C/min～20 DEG C/min, and the temperature stability of described resistive heater is ± 0.1 DEG C.Described PT-100 temperature
The precision of degree probe is ± 0.1+0.0017T, packs with politef outside described PT-100 temperature probe.
In the present embodiment, as it is shown in figure 1, it is internal layer that described first temperature probe 24 stretches into the height within internal layer tank body 8
The half of tank body 8 height.First temperature probe 24 is so set, it is possible to record more accurate coal sample tank 14 internal temperature.
The coal thermal insulation spontaneous combustion experimental technique of the present invention, comprises the following steps:
Step one, coal sample 13 broken, that sieve is loaded inside internal layer tank body 8, and the first temperature probe 24 is passed
It is internal that second through hole 11 stretches into internal layer tank body 8, 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, the upper end of air inlet pipe 9 and the upper end of escape pipe 10 are all passed from the first through hole 5
Outside described gas bath calorstat casing, the second temperature probe 25 is set in described gas bath calorstat 1, and the first thermometric is visited
The holding wire of 24 and the holding wire of the second temperature probe 25 pass outside described gas bath calorstat casing from the first through hole 5,
The upper end of air inlet pipe 9 is connected with economizer bank 20, by holding wire and the signal of the second temperature probe 25 of the first temperature probe 24
Line is connected with the input of controller module 21, 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 the power supply of heating unit 12
Loop, heating unit 12 begins to warm up；
Step 6, the connection of drying tube 17 with air source of the gas 16 is disconnected, and drying tube 17 is connected with Nitrogen source gases, past
It is passed through nitrogen in described coal sample tank 14, after the temperature value detected until the first temperature probe 24 and the second temperature probe 25 is stable,
Again 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, start coal thermal insulation spontaneous combustion
Get angry and test；
In step 7, heating unit 12 heating process, described coal sample tank 14 internal temperature is carried out by the first temperature probe 24
Detection in real time, described coal sample tank 14 external temperature is detected by the second temperature probe 25 in real time, and controller module 21 is to first
Described coal sample tank 14 interior temperature signal that temperature probe 24 detects and the described coal sample tank that the second temperature probe 25 detects
14 external temperature signals carry out periodic samples and are transferred to control computer 23 and show, and by internal for described coal sample tank 14
The sampled value of temperature signal and the temperature upper limit phase comparison of setting, when the temperature upper limit that sampled value not up to sets, control
Device module 21 processed controls computer heating control relay 26 and is continuously turned on the current supply circuit of heating unit 12, and heating unit 12 persistently adds
Heat, when sampled value reaches the temperature upper limit set, controller module 21 controls computer heating control relay 26 and disconnects heating list
The current supply circuit of unit 12, heating unit 12 stops heating；Meanwhile, the temperature in controller module 21 records described coal sample tank 14 reaches
To coal sample 13 carries out the adiabatic required temperature spot tested of spontaneous combustion experiment, the temperature in described coal sample tank 14 reaches right
When coal sample 13 carries out the temperature spot of adiabatic spontaneous combustion experiment required test, coal sample 13 is produced by gas chromatographicanalyzer 27
Gas component detects.When being embodied as, described gas chromatographicanalyzer 27 selects SP2120 mine drainage gas to analyze special gas phase
Chromatograph 27, it is possible to O2、N2、CO、CO2、CH4、C2H6、C2H4、C2H2Carry out separating and concentration inspection Deng kind of a gas componant
Survey；The data of described gas chromatographicanalyzer 27 record can be used in judging the combustion case of coal sample 13, and sets up relevant coal certainly
Combustion model, instructs the prevention and cure project of spontaneous combustion of coal.
In the present embodiment, the temperature upper limit in the described coal sample tank 14 set in step 5, as 200 DEG C～1000 DEG C, walks
In rapid seven, coal sample 13 is carried out the temperature spot of the multiple that temperature spot is ten of the adiabatic required test of spontaneous combustion experiment.
The above, be only presently preferred embodiments of the present invention, not impose any restrictions the present invention, every according to the present invention
Any simple modification, change and the equivalent structure change that above example is made by technical spirit, all still falls within skill of the present invention
In the protection domain of art 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.
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