CN110006947A - Coal spontaneous combustion and coal and gas mixed explosion pilot system - Google Patents
Coal spontaneous combustion and coal and gas mixed explosion pilot system Download PDFInfo
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- CN110006947A CN110006947A CN201910316082.3A CN201910316082A CN110006947A CN 110006947 A CN110006947 A CN 110006947A CN 201910316082 A CN201910316082 A CN 201910316082A CN 110006947 A CN110006947 A CN 110006947A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
- G01N25/22—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on combustion or catalytic oxidation, e.g. of components of gas mixtures
- G01N25/28—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on combustion or catalytic oxidation, e.g. of components of gas mixtures the rise in temperature of the gases resulting from combustion being measured directly
- G01N25/38—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on combustion or catalytic oxidation, e.g. of components of gas mixtures the rise in temperature of the gases resulting from combustion being measured directly using the melting or combustion of a solid
- G01N25/385—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on combustion or catalytic oxidation, e.g. of components of gas mixtures the rise in temperature of the gases resulting from combustion being measured directly using the melting or combustion of a solid for investigating the composition of gas mixtures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/50—Investigating or analyzing materials by the use of thermal means by investigating flash-point; by investigating explosibility
- G01N25/54—Investigating or analyzing materials by the use of thermal means by investigating flash-point; by investigating explosibility by determining explosibility
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Abstract
The invention discloses a kind of coal spontaneous combustion and coal and gas mixed explosion pilot systems, including trial furnace, air reservoir, gas storage tank, gas chromatograph, temperature indicator and temperature control heating system, trial furnace includes furnace body and base of furnace body, the fire door of furnace body is equipped with circle observation window, the gas outlet of air reservoir and the air intlet of furnace body connect, the gas outlet of gas storage tank and the gas import of furnace body connect, air flow control valve is installed on air intake pipe, pressure gauge is sequentially installed with from gas storage tank to furnace body on gas inlet pipe road, flowmeter and gas flow control valve, the gas collecting mouth of furnace body is connect with gas chromatograph；Thermal resistance sensor is installed, thermal resistance sensor is connect with temperature indicator, and the pressure relief vent of furnace body is equipped with relief valve in furnace body.The present invention can measure the parameters such as the critical-temperature for causing coal spontaneous combustion to develop into gas and coal-dust explosion, gas amount and explosion product, to studied with gas explosion rule coal spontaneous combustion and coal.
Description
Technical field
The invention belongs to coal spontaneous combustions to couple with gas and causes calamity technical field, is specifically related to a kind of coal spontaneous combustion and coal and gas
Mixed explosion pilot system.
Background technique
The coal resources in China are contained compared with horn of plenty, while coal resources are also used as a kind of considerable consumption in China
Source accounts for about the 60% of the disposable energy-consuming in China.In the process of coal mining, it may occur that fire, coal and gas are prominent
Have, be permeable, gas explosion, coal dust, all class accidents, these disasters such as roof caving not only result in the loss of coal resources, more
The life security of underground work personnel can be threatened, destroy production equipment, cause huge property loss.
Coal mine underground coal bed spontaneous fire will cause the loss of many resources, this is because the generation of fire mostly can be along with
The generation of toxic gas, and in order to avoid the expansion of fire, it will cause certain region to be closed, thus caused by
Not minable coal resources, have just had reached hundred million tons.Meanwhile in mine disaster, gas explosion accident belongs to destructiveness
Maximum, injury most serious accident.The high temperature and pressure that gas explosion generates, can promote the gas near quick-fried source with great speed
Impact outward, causes casualties, and destroys tunnel and equipment facility, raises a large amount of coal dusts and is allowed to participate in explosion, generates bigger
Destructive power.In addition, generating a large amount of pernicious gas after explosion, personnel is caused to be poisoned to death.
Mine gas and coal spontaneous combustion symbiosis disaster influence each other and be embodied in: gas drainage will lead to rupture coal body and goaf
It leaks out, easily causes coal spontaneous combustion, and coal spontaneous combustion fire source may cause gas explosion, while become the great risk of shaft production
Source.It can be seen that in the case where coal spontaneous combustion occurs, gas explosion accident easily occurs for highly gassy mine, extent of the destruction is huge,
Risk far surpasses its harm in its natural state.
It is tested for coal spontaneous combustion and coal and gas mixed explosion, carries out field test excessively complexity and cost is huge, and
Existing pilot system more lacks, therefore has certain system to the law study of coal spontaneous combustion and coal and gas mixed explosion
About.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art described above, a kind of coal spontaneous combustion is provided and coal is mixed with gas
Explosive test system is used to measure critical-temperature, gas amount and the explosion for causing coal spontaneous combustion to develop into gas and coal-dust explosion
The parameters such as product, to studied with gas explosion rule coal spontaneous combustion and coal.
To achieve the above object, the technical solution adopted by the present invention is that: a kind of coal spontaneous combustion and coal and gas mixed explosion try
Check system, it is characterised in that: including trial furnace, air reservoir, gas storage tank, gas chromatograph, temperature indicator and be described
The temperature control heating system of stove heating is tested, the air reservoir, gas storage tank, gas chromatograph and temperature indicator are arranged at
Outside the trial furnace, the trial furnace includes furnace body and base of furnace body, and the furnace body is mounted on the top of base of furnace body, the furnace
Circle observation window is provided on the fire door of body, the gas outlet of the air reservoir passes through the air of air intake pipe and furnace body
Import connection, the gas outlet of the gas storage tank are connected by the gas import of gas inlet pipe road and furnace body, the air into
Air flow control valve is installed in feed channel, is sequentially installed with pressure from gas storage tank to furnace body on the gas inlet pipe road
The gas collecting mouth of table, flowmeter and gas flow control valve, the furnace body is connected with gas chromatograph；Peace in the furnace body
Equipped with the thermal resistance sensor for detecting furnace body temperature, the thermal resistance sensor passes through the first conducting wire and temperature indicator
It connects and temperature detected is shown by temperature indicator, the pressure relief vent of the furnace body is equipped with relief valve.
Above-mentioned coal spontaneous combustion and coal and gas mixed explosion pilot system, it is characterised in that: the temperature control heating system packet
Electromagnetic heater and temperature controller are included, the electromagnetic heater is connect by the second conducting wire with electromagnetic heater, the electromagnetic heating
Device is arranged in the top of base of furnace body and is located in furnace body, and the temperature controller is arranged outside the trial furnace.
Above-mentioned coal spontaneous combustion and coal and gas mixed explosion pilot system, it is characterised in that: the electromagnetic heater is anti-
Quick-fried electromagnetic heater.
Above-mentioned coal spontaneous combustion and coal and gas mixed explosion pilot system, it is characterised in that: the thermal resistance sensor
Quantity be it is multiple, multiple thermal resistance sensors are uniformly mounted on the side wall and roof of furnace body, and multiple thermal resistances pass
The temperature value of sensor parallel connection and the detection of multiple thermal resistance sensors is shown after being averaging by temperature indicator.
Above-mentioned coal spontaneous combustion and coal and gas mixed explosion pilot system, it is characterised in that: the outlet of the pressure relief vent
End is connected with vacuum tank.
Above-mentioned coal spontaneous combustion and coal and gas mixed explosion pilot system, it is characterised in that: the shape of the furnace body is length
Cube, the circle observation window are arranged at the front side geometric center of furnace body.
Above-mentioned coal spontaneous combustion and coal and gas mixed explosion pilot system, it is characterised in that: the furnace body is flame proof furnace body.
Above-mentioned coal spontaneous combustion and coal and gas mixed explosion pilot system, it is characterised in that: the circle observation window is adopted
With the tempered glass with a thickness of 8mm~12mm.
Above-mentioned coal spontaneous combustion and coal and gas mixed explosion pilot system, it is characterised in that: the thermal resistance sensor is
Wolfram rhenium heat electric couple.
Compared with the prior art, the present invention has the following advantages:
1, coal spontaneous combustion and coal may be implemented in the present invention and gas mixed explosion is tested, and can be used for measuring causes coal spontaneous combustion to develop
At parameters such as the critical-temperature of gas and coal-dust explosion, gas amount and explosion products, thus to coal spontaneous combustion and coal and gas explosion
Rule is furtherd investigate.
2, furnace body of the present invention uses cuboid flame proof furnace body, and fire door center is equipped with circle observation window, convenient for test people
Member's observation test process.
3, the flameproof enclosure of furnace body of the present invention is made of metal materials such as steel plate, cast aluminiums, and circle observation window uses tempering
Glass meets national standard and requires the resistance requirements of form, impact strength and the rigid indexs such as insulation/antistatic property requirement, can
When test being avoided to carry out, the coal occurred and gas explosion constitute a threat to safely to testing crew.
4, the present invention can pass through the gas of control coal temperature and reaction by temperature controller and flowmeter, flow control valve
Concentration causes coal body spontaneous combustion or coal and gas explosion, to study coal spontaneous combustion and coal and gas explosion rule.
5, the present invention is simple to manufacture, and manufacturing cost is low, can be effectively used for coal spontaneous combustion and coal and gas mixed explosion test
In the process.
Below by drawings and examples, the present invention is described in further detail.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is layout diagram of the thermal resistance sensor of the present invention at the top of furnace body.
Description of symbols:
1-gas storage tank；2-pressure gauges；3-flowmeters；
4-gas flow control valves；5-furnace bodies；6-electromagnetic heaters；
7-pressure relief vents；8-relief valves；9-gas collecting mouths；
10-thermal resistance sensors；11-temperature controllers；12-circle observation windows；
13-base of furnace body；14-gas chromatographs；15-temperature indicators；
16-the second conducting wire；17-gas inlet pipe roads；18-vacuum tanks；
19-air reservoirs；20-air intake pipes；21-air flow control valves；
22-the first conducting wire.
Specific embodiment
As shown in Figure 1, the present invention includes trial furnace, air reservoir 19, gas storage tank 1, gas chromatograph 14, temperature display
Instrument 15 and be it is described test stove heating temperature control heating system, the air reservoir 19, gas storage tank 1,14 and of gas chromatograph
Temperature indicator 15 is arranged at outside the trial furnace, and the trial furnace includes furnace body 5 and base of furnace body 13, and the furnace body 5 is pacified
Mounted in the top of base of furnace body 13, circle observation window 12 is provided on the fire door of the furnace body 5, the air reservoir 19 goes out
Port is connect by air intake pipe 20 with the air intlet of furnace body 5, and the gas outlet of the gas storage tank 1 passes through gas air inlet
Pipeline 17 is connect with the gas import of furnace body 5, is equipped with air flow control valve 21 on the air intake pipe 20, and described watt
Pressure gauge 2, flowmeter 3 and gas flow control valve 4, institute are sequentially installed with from gas storage tank 1 to furnace body 5 on this admission line 17
The gas collecting mouth 9 for stating furnace body 5 is connected with gas chromatograph 14；It is equipped in the furnace body 5 for detecting temperature in furnace body 5
Thermal resistance sensor 10, the thermal resistance sensor 10 connect with temperature indicator 15 by the first conducting wire 22 and shown by temperature
Show that instrument 15 shows temperature detected, the pressure relief vent 7 of the furnace body 5 is equipped with relief valve 8.
Wherein, pressure gauge 2, flowmeter 3 and gas flow control valve 4 control the gas amount being passed through in furnace body 5, when
When gas density in furnace body 5 reaches critical value, coal explodes with gas mixture in furnace, and testing crew can pass through fire door
12 pairs of test processes of circle observation window are supervised.
Furnace body 5 is equipped with gas collecting mouth 9, and testing crew can carry out taking gas by gas collecting mouth 9, and be injected into gas
Chromatography 14 carries out gas composition analysis, the variation of Observable explosion front and back reaction product.After coal and gas mixed explosion
High pressure gas can be generated in furnace body 5, pressure release can be carried out by the pressure relief vent 7 on the outside of furnace body.
As shown in Figure 1, the temperature control heating system includes electromagnetic heater 6 and temperature controller 11, the electromagnetic heater 6 is logical
It crosses the second conducting wire 16 to connect with electromagnetic heater 6, the electromagnetic heater 6 is arranged in the top of base of furnace body 13 and is located at furnace body
In 5, the temperature controller 11 is arranged outside the trial furnace.
When temperature set by temperature controller 11 has not been reached yet in the temperature that thermal resistance sensor 10 detects, temperature controller 11 is defeated
Contact point closure out；After the temperature that thermal resistance sensor 10 detects reaches temperature set by temperature controller 11, temperature controller 11
The contact point of output disconnects.
In the present embodiment, the electromagnetic heater 6 is explosion-proof electromagnetic heater, and explosion-proof electromagnetic heater is existing product,
Flameproof enclosure is made by welding procedure using metal materials such as iron-containing steel, cast aluminiums in the shell of electromagnetic heater 6.
As shown in Figure 1, the quantity of the thermal resistance sensor 10 is multiple, the uniform peace of multiple thermal resistance sensors 10
On the side wall and roof of furnace body 5, multiple thermal resistance sensors 10 parallel connection and the detection of multiple thermal resistance sensors 10
Temperature value by temperature indicator 15 be averaging after shown.
It, not only can be to avoid directly will be in furnace as shown in Figure 1, the outlet end of the pressure relief vent 7 is connected with vacuum tank 18
Exhaust gas drains into interior, and convenient for accelerating pressure release, also avoids causing damages to testing crew.
In the present embodiment, the shape of the furnace body 5 is cuboid, before furnace body 5 is arranged in the circle observation window 12
At the geometric center of side.
In the present embodiment, the furnace body 5 is flame proof furnace body, using the flame proofs material such as steel plate, cast aluminium, by welding procedure system
At flame proof furnace body, there is flame proof effect.
In the present embodiment, the circle observation window 12 meets state using the tempered glass with a thickness of 8mm~12mm
Mark the rigid indexs such as the resistance requirements to form, impact strength requirement and insulation/antistatic property requirement.
In the present embodiment, the thermal resistance sensor 10 is Wolfram rhenium heat electric couple, and the inner wall of furnace body 5 is passed equipped with multiple thermal resistances
Sensor 10, and connect by the first conducting wire 22 with temperature indicator 15；Thermal resistance probe uses Wolfram rhenium heat electric couple, and highest can thermometric
Degree reaches+2800 DEG C, can measure to the high temperature in furnace body 5, and measured temperature signal is converted to electric signal, testing crew can
Record measurement result is read by temperature indicator 15.
The operation principle of the present invention is that: when carrying out coal spontaneous combustion test, test coal body is placed in the electromagnetism inside furnace body 5
On heater 6, electromagnetic heater 6 generates alternating magnetic field by its internal electron wiring board component part, cuts alternate magnetic force line
To generate the electric current (be vortexed) of alternation, vortex makes shell iron atom high speed random motion, atom collide with each other, rub and
Thermal energy is generated, to play the effect of heating coal body.
Sufficient oxygen is provided into furnace body 5 from air reservoir 19, testing crew can control electromagnetism by temperature controller 11 and add
6 pairs of top test coal bodies of hot device heat, and accelerate the oxidation reaction speed of coal, increase the temperature of dump, simulate dump
Spontaneous combustion process.Thermal resistance sensor 10 each in furnace body 5 is in parallel, it can get the average value of measuring point temperature in furnace body 5, temperature display
The temperature shown on instrument 15.It is evacuated at 10 DEG C of every heating by gas collecting mouth 9, injection gas chromatograph 14 carries out gas
Analysis, obtains coal spontaneous combustion index gas (O under the conditions of the temperature2、N2、CO、CO2、CH4、C2H4、C2H6) concentration, carry out arrangement note
It employs in later period Parameter analysis.Testing crew is observed in circle observation window 12, when occurring ignition phenomenon (i.e. temperature in furnace body 5
More than coal self-ignition point when, dump occur spontaneous combustion) when, pass through temperature controller 11 control electromagnetic heater 6 stop heating, record temperature
The temperature shown on display instrument 15, and be evacuated by gas collecting mouth 9, injection gas chromatograph 14 carries out gas analysis,
Obtain coal spontaneous combustion index gas (O under the conditions of the temperature2、N2、CO、CO2、CH4、C2H4、C2H6) concentration.
Dump stops heating after spontaneous combustion occurs, at this time the oxygen content with certain flach point and abundance in furnace body 5,
Gas flow control valve 4 is opened, the gas amount in injection furnace body 5 is slowly increased by gas flow control valve 4, while air stores up
Tank 19 continues to provide sufficient oxygen into furnace body 5.It is observed by circle observation window 12, when coal is mixed with gas in furnace body 5
When explosion (gas reaches to a certain degree in furnace, can cause coal and gas explosion) occurs, shown on record temperature indicator 15
Temperature, and being evacuated by gas collecting mouth 9, injection gas chromatograph 14 carries out gas analysis, under the conditions of obtaining the temperature
Coal spontaneous combustion index gas (O2、N2、CO、CO2、CH4、C2H4、C2H6) concentration, collate the minutes for later period Parameter analysis.
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, change and equivalent structure transformation to the above embodiments, still fall within skill of the present invention
In the protection scope of art scheme.
Claims (9)
1. a kind of coal spontaneous combustion and coal and gas mixed explosion pilot system, it is characterised in that: including trial furnace, air reservoir
(19), gas storage tank (1), gas chromatograph (14), temperature indicator (15) and the temperature control heating system for the test stove heating
System, the air reservoir (19), gas storage tank (1), gas chromatograph (14) and temperature indicator (15) are arranged at the examination
It tests outside furnace, the trial furnace includes furnace body (5) and base of furnace body (13), and the furnace body (5) is mounted on the top of base of furnace body (13)
Portion is provided with circle observation window (12) on the fire door of the furnace body (5), and the gas outlet of the air reservoir (19) passes through air
Admission line (20) is connect with the air intlet of furnace body (5), and the gas outlet of the gas storage tank (1) passes through gas inlet pipe road
(17) it is connect with the gas import of furnace body (5), air flow control valve (21), institute is installed on the air intake pipe (20)
It states and is sequentially installed with pressure gauge (2), flowmeter (3) and gas from gas storage tank (1) to furnace body (5) on gas inlet pipe road (17)
The gas collecting mouth (9) of flow control valve (4), the furnace body (5) is connected with gas chromatograph (14)；In the furnace body (5)
Thermal resistance sensor (10) for detecting furnace body (5) interior temperature is installed, the thermal resistance sensor (10) is led by first
Line (22) connect with temperature indicator (15) and shows temperature detected by temperature indicator (15), and furnace body (5) are let out
It extrudes mouth (7) and relief valve (8) is installed.
2. coal spontaneous combustion described in accordance with the claim 1 and coal and gas mixed explosion pilot system, it is characterised in that: the temperature control
Heating system includes electromagnetic heater (6) and temperature controller (11), and the electromagnetic heater (6) passes through the second conducting wire (16) and electromagnetism
Heater (6) connection, the top of electromagnetic heater (6) setting in base of furnace body (13) and interior, the temperature positioned at furnace body (5)
Device (11) are controlled to be arranged outside the trial furnace.
3. coal spontaneous combustion and coal and gas mixed explosion pilot system according to claim 2, it is characterised in that: the electromagnetism
Heater (6) is explosion-proof electromagnetic heater.
4. according to coal spontaneous combustion described in claim 1,2 or 3 and coal and gas mixed explosion pilot system, it is characterised in that: institute
State thermal resistance sensor (10) quantity be it is multiple, multiple thermal resistance sensors (10) are uniformly mounted on the side of furnace body (5)
On wall and roof, the temperature value of the parallel connection of multiple thermal resistance sensors (10) and the detection of multiple thermal resistance sensors (10) is logical
Excess temperature display instrument (15) is shown after being averaging.
5. according to coal spontaneous combustion described in claim 1,2 or 3 and coal and gas mixed explosion pilot system, it is characterised in that: institute
The outlet end for stating pressure relief vent (7) is connected with vacuum tank (18).
6. according to coal spontaneous combustion described in claim 1,2 or 3 and coal and gas mixed explosion pilot system, it is characterised in that: institute
The shape for stating furnace body (5) is cuboid, and the circle observation window (12) is arranged at the front side geometric center of furnace body (5).
7. according to coal spontaneous combustion described in claim 1,2 or 3 and coal and gas mixed explosion pilot system, it is characterised in that: institute
Stating furnace body (5) is flame proof furnace body.
8. according to coal spontaneous combustion described in claim 1,2 or 3 and coal and gas mixed explosion pilot system, it is characterised in that: institute
Circle observation window (12) are stated using the tempered glass with a thickness of 8mm~12mm.
9. according to coal spontaneous combustion described in claim 1,2 or 3 and coal and gas mixed explosion pilot system, it is characterised in that: institute
Stating thermal resistance sensor (10) is Wolfram rhenium heat electric couple.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910316082.3A CN110006947A (en) | 2019-04-19 | 2019-04-19 | Coal spontaneous combustion and coal and gas mixed explosion pilot system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910316082.3A CN110006947A (en) | 2019-04-19 | 2019-04-19 | Coal spontaneous combustion and coal and gas mixed explosion pilot system |
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| CN110006947A true CN110006947A (en) | 2019-07-12 |
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| CN201910316082.3A Pending CN110006947A (en) | 2019-04-19 | 2019-04-19 | Coal spontaneous combustion and coal and gas mixed explosion pilot system |
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| CN112415052A (en) * | 2020-11-04 | 2021-02-26 | 中国矿业大学 | Experimental simulation device and method for high-temperature oxidation characteristic and ignition/explosion gas of coal |
| CN113777132A (en) * | 2021-07-29 | 2021-12-10 | 华北科技学院(中国煤矿安全技术培训中心) | Coal self-heating excitation ultrafine dust flash combustion induced gas explosion experimental device |
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| CN112415052A (en) * | 2020-11-04 | 2021-02-26 | 中国矿业大学 | Experimental simulation device and method for high-temperature oxidation characteristic and ignition/explosion gas of coal |
| CN113777132A (en) * | 2021-07-29 | 2021-12-10 | 华北科技学院(中国煤矿安全技术培训中心) | Coal self-heating excitation ultrafine dust flash combustion induced gas explosion experimental device |
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Application publication date: 20190712 |