CN208818642U - A kind of experimental system for testing coal spontaneous ignition overall process - Google Patents
A kind of experimental system for testing coal spontaneous ignition overall process Download PDFInfo
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- CN208818642U CN208818642U CN201821465565.7U CN201821465565U CN208818642U CN 208818642 U CN208818642 U CN 208818642U CN 201821465565 U CN201821465565 U CN 201821465565U CN 208818642 U CN208818642 U CN 208818642U
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Abstract
The problem of the utility model relates to a kind of experimental systems for testing coal spontaneous ignition overall process, and solving existing experimental provision very cannot accurately test out experimental result, and take a long time, experimentation consumption a large amount of manpower and material resources.The system includes feeder, flow automatic control device, coal sample tank, heating furnace, thermobalance, filter device, cooling device, gas-detecting device and computer；Coal sample tank is placed in a heating furnace, and thermobalance senses line by thermal resistance and connects coal sample tank；Feeder includes multiple gas tanks, and the exit of gas tank is provided with pressure reducing valve；Feeder is connect by air induction conduit with coal sample tank, and coal sample tank is connect by outtake tube with gas-detecting device, and gas-detecting device transfers data to computer；It is provided with flow automatic control device on air induction conduit, is provided with filter device and cooling device on outtake tube.
Description
Technical field
The utility model relates to a kind of coal combustion experimental systems, and in particular to a kind of reality for testing coal spontaneous ignition overall process
Check system.
Background technique
Mine coal spontaneous combustion is one of big disaster of coal mine five, and the coal seam of 90% or more China has the characteristics that spontaneous combustion or easy spontaneous combustion.
As coal mining intensity constantly increases, the horizontal continuous deepening of pit mining, coal-bed gas pressure, gas bearing capacity, crustal stress and
Gas emission constantly increases, and coal spontaneous combustion fire, which constitutes mine safety production, to be seriously threatened.Fire caused by spontaneous combustionof coal
Account for about the 85% of mine fire sum, wherein heterogeneous goaf fire accounts for 60% or more of coal mine breeding fire, Chinese 25 masters
More than 130 large and medium-sized mining areas of producing coal provinces and regions are wanted to be threatened in various degree by Period of Coal Seam Spontaneous Combustion.Such as Ningxia east mining area, Shan
Northern infrared ray light shine etc. is annual all to there is the CO abnormal combustion phenomenon due to caused by coal spontaneous combustion, and spontaneous combustion of coal is serious.According to statistics,
In severe and great casualty more than dead 10 people, account for about 6.7% by fire is directly caused.Spontaneous combustionof coal induces coal mine gas and powder
The secondary disasters such as dust explosion easily cause accident and loss to expand.
Coal spontaneous combustion is a kind of physical change reaction of complexity, and development is a kind of nonlinear dynamic changing process, including
Quick oxidation stage is slowly oxidized to by low temperature, and coal can generate a large amount of index gas in entire change procedure.Coal spontaneous combustion
Gaseous product refers to the gas that coal seam is released under the conditions of subsurface environment due to its spontaneous combustion comprising two parts, one
It is divided into coal spontaneous combustion oxidizing gas, is the gaseous product generated due to coal autoxidation；Another part is coal spontaneous combustion adsorbed gas, is
The gas adsorbed in coalification course is desorbed since coal temperature increases.Therefore, accurate testing research index gas
The rule varied with temperature has particularly important directive significance to the prevention and treatment of coal spontaneous combustion in each Mine Production.
Currently, carrying out the research of coal spontaneous combustion frequently with oxidation experiment oven process, that is, establish Large-scale Coal spontaneous combustion hair
Fiery experiment porch simulates spontaneous combustionof coal, can be divided into according to temperature control mode: constant temperature oxidation method (including activation energy method, new intersection
Point temperature method), tracking method of temperature-control by (including automatic heating temperature rate and self-heating temperature method) and programmed temperature method (crossing point temperature method).
The experiment of coal low temperature procedure heating at present is test one of coal index gas and the main means of ignition quality, and advantage essentially consists in
The spontaneous combustion feature of different coal samples can be detected within a short period of time.
Experiment for existing coal spontaneous firing characteristic parameter study, the experimental provision that figure is larger, function is more complete,
With the testing time is longer, testing cost also higher defect；Figure is lesser, can although the testing time is obviously shortened
The temperature of detection is lower, and function is also more single, and experimental system can cause systematic error to test result.Therefore, because existing
Some experimental provisions very cannot accurately test out relevant experimental result, and take a long time, and experimentation is also consumed by largely
Manpower and material resources, therefore very it is necessary to develop a kind of experimental system setup of completely new coal spontaneous ignition overall process.
Summary of the invention
The purpose of this utility model is to solve existing experimental provision very cannot accurately test out experimental result, and time-consuming
It is longer, experimentation consume a large amount of manpower and material resources the problem of, provide it is a kind of test coal spontaneous ignition overall process experimental system.
To achieve the goals above, the technical solution of the utility model is:
A kind of experimental system for testing coal spontaneous ignition overall process, including feeder, flow automatic control device, coal sample
Tank, heating furnace, thermobalance, filter device, cooling device, gas-detecting device and computer；The coal sample tank, which is placed on, to be added
In hot stove, thermobalance is placed with above heating furnace, thermobalance senses line by thermal resistance and connects coal sample tank, for weighing coal sample
The quality of tank；The feeder includes multiple gas tanks, and the exit of the gas tank is provided with pressure reducing valve；The feeder is logical
It crosses air induction conduit to connect with coal sample tank, the coal sample tank is connect by outtake tube with gas-detecting device, gas-detecting device
Transfer data to computer；It is provided with flow automatic control device on the air induction conduit, is provided on the outtake tube
Filter device and cooling device；The flow automatic control device includes pressure gauge, the first mass flow controller, the second mass
Flow controller；The pressure gauge and the first mass flow controller are arranged on the export pipeline of each gas tank, second matter
Amount flow controller is arranged in the inlet ductwork of coal sample tank.
Further, airtight pipeline is additionally provided on the outtake tube, the end of the airtight pipeline is connected to sink.
Further, the heating furnace includes furnace body and fire door, and furnace body includes shell, inner casing, heat-insulating material, heating list
Member, temperature measuring unit and control panel；The gap of the shell and inner casing is filled using heat-insulating material, and the heating unit is more
It is a, it is separately positioned on sidewall of the furnace body, upper of furnace body and bottom；The temperature measuring unit be it is multiple, be separately positioned in furnace body and coal
In sample tank, the control panel is arranged in furnace body case surface, and control heating unit and temperature measuring unit, the fan are set respectively
It sets on sidewall of the furnace body.
Further, the shell and inner casing are all made of metal material and are made, and heat-insulating material is aeroge, and heating unit is
Nickel chromium triangle electric furnace heating wire, temperature measuring unit are single platinum rhodium thermocouple.
Further, the connecting wire of the temperature measuring unit, heating unit and control panel is enclosed with heat resistant material.
Further, the cooling device is semiclosed sink, and cell wall places the semiconductor chilling plate of encapsulation.
Further, the gas-detecting device is laser gas analyzer.
Further, third mass flow controller is additionally provided on the outtake tube.
Further, the coal sample tank is divided into cover and tank body two parts, and cover and tank body use flanged joint.
Further, the shape of the tank body is cylindrical body, and tank body is suspended in furnace space center.
The invention has the benefit that
1. Tthe utility model system relative to existing experimental rig, significantly reduces the workload of laboratory technician, highly certainly
Dynamicization can work under the adverse circumstances such as high temperature, high flue dust, and can realize constant temperature, temperature programming, tracking heating etc. it is a variety of
Experiment condition.
2. Tthe utility model system during experiment, due to having accomplished that the concentration of real-time detection gas changes, can obtain
The more accurate experimental data in than previous experimentation, this has emphatically the mechanism that research cold stage coal spontaneous is under fire
The meaning wanted.
3. the utility model is by the optimization to air path part, so that the more present experimental rig of error significantly reduces,
Without gas collecting and manual testing's process, the systematic error of experiment is further reduced.System is precisely controlled in experimentation
Gas flow, reduce experimental error, obtain coal sample quality in experimentation and vary with temperature rule.
4. the utility model is about 15 minutes using the preheating time of laser gas analyzer, when use, sets without calibration
It is standby, gas component concentrations are measured less than five seconds.Conventional gas phase chromatograph takes around preheating in one hour, uses two hours schools
Quasi- gas chromatograph measures gas component every time and takes around ten minutes, therefore greatly shortens the test period.
5. the also perfect diversification of detection gas components of Tthe utility model system, has this and obtain completely new coal spontaneous and be under fire
Overall process experimental system setup.
Detailed description of the invention
Fig. 1 is the experimental system schematic diagram that the utility model tests coal spontaneous ignition overall process；
Fig. 2 is the utility model heating furnace body structural schematic diagram.
Appended drawing reference: 1- gas tank, 2- pressure reducing valve, 3- pressure gauge, the first mass flow controller of 4-, the second mass flow of 5-
Controller, 6- two-bit triplet solenoid valve, 7- thermobalance, 8- coal sample tank, 9- heating furnace, 10- cooling device, 11- filter device,
12- third mass flow controller, 13- gas-detecting device, 14- computer, the airtight pipeline of 15-, 16- sink, 18- air inlet are led
Pipe, 19- outtake tube, 91- shell, 92- inner casing, 93- heat-insulating material, 94- heating unit, 95- temperature measuring unit, 96- control plane
Plate, 97- fan.
Specific embodiment
The contents of the present invention are described in further detail below in conjunction with the drawings and specific embodiments.
The utility model provides a kind of heating furnace and coal spontaneous surveying device of air one, can be realized uninterrupted test is sent out
The experimental system setup of fiery overall process.The system causes system to miss test result first is that solving experimental system bring itself
Difference；Second is that overcoming original experimental provision longer testing time, avoids and artificially missed caused by manually taking in gas test process
Difference；Third is that the perfect diversification of detection gas components, has this and obtains completely new coal spontaneous ignition overall process experimental system setup.
As shown in Figure 1, the experimental system of the test coal spontaneous ignition overall process, including feeder, flow automatically control
Device, coal sample tank 8, heating furnace 9, thermobalance 7, filter device 11, cooling device 10, gas-detecting device 13 and computer
14。
Heating furnace 9 is made of furnace body and fire door, and the shape of furnace body is cuboid, including two short side walls and a long side
Wall.Furnace body includes shell 91, inner casing 92, heat-insulating material 93, heating unit 94, temperature measuring unit 95 and control panel 96；Shell 91
Filled with the gap of inner casing 92 using heat-insulating material 93, heating unit 94 be it is multiple, be separately positioned on sidewall of the furnace body, upper of furnace body
The bottom and；Temperature measuring unit 95 is two, is separately positioned in the side wall and tank body of furnace body, is placed on the temperature measuring unit of sidewall of the furnace body
95 effect is the monitoring intracorporal temperature of furnace, and temperature measuring unit 95 is for measuring the intracorporal temperature of tank in tank body.Control panel 96 is set
It sets on 91 surface of furnace body shell, and controls heating unit 94 and temperature measuring unit 95 respectively.Shell 91 and inner casing 92 are metal material
Material, using 304 stainless steels, heat-insulating material 93 is aeroge, and heating unit 94 is nickel chromium triangle electric furnace heating wire, and the electric furnace heating wire of sidewall of the furnace body is inlayed
On its side wall, the electric furnace heating wire of upper of furnace body and bottom is embedded on stainless steel inner casing 92.Temperature measuring unit 95 and tank in tank body
External temperature measuring unit 95 is using single platinum rhodium thermocouple.The connecting wire of temperature measuring unit 95 and heating unit 94 and control panel 96
It is enclosed with heat resistant material, fan 97 is additionally provided on sidewall of the furnace body.There are three temperature control instruments on temperature control panel 96, respectively
Temperature measuring unit 95 in corresponding tank body and furnace body.There is lid above heating furnace 9 body, sets that there are three through-holes on lid.
Coal sample tank 8 is placed in the burner hearth of heating furnace 9, is divided into cover and tank body two parts, and cover and tank body use flange
Connection.The shape of tank body is cylindrical body, is suspended in furnace space center, to guarantee that tank body each section is heated properly, tank
Intracorporal temperature measuring unit 95 is placed at tank body high about 1/2.The design of 8 bottom of coal sample tank has air induction conduit 18, and tank interior uses
150 mesh copper mesh hold coal sample, and outtake tube 19 is housed on cover.Coal sample tank 8 is connect by air induction conduit 18 with feeder,
It is connect by outtake tube 19 with gas-detecting device 13, air induction conduit 18 is connected to by the through-hole of heated 9 lid of furnace of gas source
8 bottom of coal sample tank, air induction conduit 18 spiral 2m after entering furnace body, for heat the gas into tank body.8 top of coal sample tank goes out
19 via through holes of airway are connected to gas-detecting device 13, i.e. laser gas analyzer, and analyzer sends data to computer
14.Air induction conduit 18 and outtake tube 19 are carbon steel gas-guide tube.
Thermobalance 7 is placed with above heating furnace 9, thermobalance 7 senses line by thermal resistance and connects tank body, is used for weighing pot
The quality of body.
Feeder includes two gas tanks 1, is respectively provided with nitrogen and oxygen, and the exit of gas tank 1 is provided with the tune of pressure reducing valve 2
Throttle body flow；Flow automatic control device is provided on air induction conduit 18；Flow automatic control device includes pressure gauge 3,
One mass flow controller 4 and the second mass flow controller 5；Pressure gauge 3 and the first mass flow controller 4 are arranged in each gas
On the export pipeline of tank 1, each gas tank 1 is connected to the inlet ductwork of coal sample tank 8, the second quality stream by two-bit triplet solenoid valve 6
Amount controller 5 is arranged in the inlet ductwork of coal sample tank 8, passes through the flow on each pipeline of mass flow controller.
Coal sample tank 8 is connected by outtake tube 19 with laser gas analyzer, and two-bit triplet electricity is added on outtake tube 19
Magnet valve 6, outtake tube 19 divide for two-way, are all the way airtight pipeline 15, the end of airtight pipeline 15 is connected to sink 16, for examining
Check and verify the air-tightness of experiment device.Another way gas is introduced into filter device 11, active charcoal and discoloration silica gel in device, for inhaling
The coal tar and moisture generated in experimentation is received, prevents from damaging detection device and generating experimental error.It is filtered
Gas enters cooling device 10, and the purpose is to laser gas analyzers will appear error when detecting high-temperature gas, misses to reduce
This device is added in difference.Cooling device 10 is semiclosed sink, and cell wall places the semiconductor chilling plate of encapsulation, for precisely cooling down,
And when room temperature is lower, by changing current direction, water body is heated, guarantees that the gas for being passed through laser gas analyzer is
Constant temperature.Constant temperature gas enters third mass flow controller 12, for adjusting the gas flow for passing through laser gas analysis part,
It is placed in gas-guide tube and does not use other tools acquisition gas, to reduce experimental error and human error, last gas passes through
It is absorbed after laser gas analyzer by sink 16.
Gas-detecting device 13 uses laser gas analyzer, and laser gas analyzer is by transmitting unit and receives single
Member forms, and has analyzer host, LCD display, operation keypad and electronic hard disc on transmitting unit.Analyzer host includes control
Multiple gas lasers such as device and CH4 gas, O2 gas, C2H4 gas, CO gas.Built-in calibrating gas reference module, and
And dynamically compensated, gas absorption spectrum line is lockked in real time, is not influenced, is not present by temperature, pressure and environmental change
Drift phenomenon.All measured value reports of system, are all continuously stored in electronic hard disc running state parameter, by using
Computer 14 can be exported all and can be exported by digital communication interface.It is finally completed to gasometry and qualitative analysis.
Laser gas analyzer application TDLAS gas detection technology keeps its inswept tested by fast modulation laser frequency
Then gas absorption spectrum line is measured using phase lock amplifying technology and transmits the harmonic component in spectral line after tested gas absorbs to analyze
The absorbing state of gas.The light intensity attenuation that semiconductor laser passes through tested gas is fixed based on Lambert-Beer (Lambert-Beer)
Rule, i.e., tested component, which has the light of specific wavelength, to be absorbed, and absorption intensity is directly proportional to concentration of component, by measuring gas pair
The decaying of laser measures gas concentration.So that it in the case where not influencing using sensitivity, temporal resolution has reached milli
Second-time.The detection of multiple gases can be taken into account using modularized design.Such as oxygen, nitrogen, carbon monoxide, methane, ethylene, second
The hydrocarbon gas such as alkane.When using the device, all data can be saved, and USB or internet can be used to lead data
Out to computer.Handling these data i.e. using corresponding software on computers can determine whether the spontaneous combustion tendency of coal.
The operating procedure of coal spontaneous ignition overall process experimental system setup includes:
1) coal sample handled well is fitted into tank body, it is then that tank body and cover is closed；
2) open fire door, by the furnace body that is placed on immediately below venthole of the tank body for installing coal sample suspension, by tank body into
Airway and outtake tube are pierced by from above the furnace body above tank body, and air induction conduit is connected with feeder；
3) fire door is closed, closed furnace body；
4) flow of gas supply is adjusted using the nitrogen oxygen atmosphere of different proportion according to the difference of experiment condition；
5) thermobalance is opened, operation temperature control panel sets specific temperature program by temperature control instrument, and control adds
Hot cell makes the intracorporal temperature of furnace be warming up to 1000 DEG C from 30 DEG C；
6) gas-guide tube is connected with laser gas analyzer, in any temperature spot, laser gas analyzer can be used
Coal sample oxidation releases the component of gas in detection test process, and then obtains continuous gas concentration modified-image.
Claims (9)
1. a kind of experimental system for testing coal spontaneous ignition overall process, it is characterised in that: automatically controlled including feeder, flow
Device, coal sample tank (8), heating furnace (9), thermobalance (7), filter device (11), cooling device (10), gas-detecting device
(13) and computer (14)；
The coal sample tank (8) is placed in heating furnace (9), is placed with thermobalance (7) above heating furnace (9), thermobalance (7)
Line connection coal sample tank (8) is sensed by thermal resistance, for weighing the quality of coal sample tank (8)；
The feeder includes multiple gas tanks (1), and the exit of the gas tank (1) is provided with pressure reducing valve (2)；The gas supply dress
It sets and is connect by air induction conduit (18) with coal sample tank (8), the coal sample tank (8) passes through outtake tube (19) and gas-detecting device
(13) it connects, gas-detecting device (13) transfers data to computer (14)；Flow is provided on the air induction conduit (18)
Automatic control device is provided with filter device (11) and cooling device (10) on the outtake tube (19)；
The flow automatic control device includes pressure gauge (3), the first mass flow controller (4), the control of the second mass flow
Device (5)；The pressure gauge (3) and the first mass flow controller (4) are arranged on the export pipeline of each gas tank (1), and described the
Two mass flow controllers (5) are arranged in the inlet ductwork of coal sample tank (8).
2. the experimental system of test coal spontaneous ignition overall process according to claim 1, it is characterised in that: the conductance out
It is additionally provided with airtight pipeline (15) on pipe (19), the end of the airtight pipeline (15) is connected to sink (16).
3. the experimental system of test coal spontaneous ignition overall process according to claim 2, it is characterised in that: the heating furnace
It (9) include furnace body and fire door, the furnace body includes shell (91), inner casing (92), heat-insulating material (93), heating unit (94), surveys
Warm unit (95), fan (97) and control panel (96)；The gap of the shell (91) and inner casing (92) uses heat-insulating material
(93) fill, the heating unit (94) be it is multiple, be separately positioned on sidewall of the furnace body, upper of furnace body and bottom；The thermometric list
First (95) be it is multiple, be separately positioned in furnace body and in coal sample tank (8), the control panel (96) is arranged in furnace body shell (91)
Surface, and heating unit (94) and temperature measuring unit (95) are controlled respectively, the fan (97) is arranged on sidewall of the furnace body.
4. the experimental system of test coal spontaneous ignition overall process according to claim 3, it is characterised in that: the shell
(91) it is all made of metal material with inner casing (92) and is made, heat-insulating material (93) is aeroge, and heating unit (94) is nickel chromium triangle electric furnace
Silk, temperature measuring unit (95) are single platinum rhodium thermocouple.
5. the experimental system of test coal spontaneous ignition overall process according to any one of claims 1 to 4, it is characterised in that: institute
Stating cooling device (10) is semiclosed sink, and cell wall places the semiconductor chilling plate of encapsulation.
6. the experimental system of test coal spontaneous ignition overall process according to claim 5, it is characterised in that: the gas inspection
Surveying device (13) is laser gas analyzer.
7. the experimental system of test coal spontaneous ignition overall process according to claim 6, it is characterised in that: the conductance out
Third mass flow controller (12) are additionally provided on pipe (19).
8. the experimental system of test coal spontaneous ignition overall process according to claim 7, it is characterised in that: the coal sample tank
(8) it is divided into cover and tank body two parts, cover and tank body use flanged joint.
9. the experimental system of test coal spontaneous ignition overall process according to claim 8, it is characterised in that: the tank body
Shape is cylindrical body, and tank body is suspended in furnace space center.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111999343A (en) * | 2020-09-01 | 2020-11-27 | 中国矿业大学(北京) | Coal spontaneous combustion characteristic parameter measurement experiment platform |
| CN112684100A (en) * | 2021-01-04 | 2021-04-20 | 大连理工大学 | Experimental device for simulating spontaneous combustion process of underground closed space coal and using method |
| 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 |
| CN114487161A (en) * | 2021-12-29 | 2022-05-13 | 安徽理工大学 | Analysis method and device capable of quantitatively measuring coal low-temperature oxidation gas generation amount |
-
2018
- 2018-09-07 CN CN201821465565.7U patent/CN208818642U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111999343A (en) * | 2020-09-01 | 2020-11-27 | 中国矿业大学(北京) | Coal spontaneous combustion characteristic parameter measurement experiment platform |
| WO2022047835A1 (en) * | 2020-09-01 | 2022-03-10 | 中国矿业大学(北京) | Experimental platform for measuring coal spontaneous combustion characteristic parameters |
| CN112684100A (en) * | 2021-01-04 | 2021-04-20 | 大连理工大学 | Experimental device for simulating spontaneous combustion process of underground closed space coal and using method |
| 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 |
| CN114487161A (en) * | 2021-12-29 | 2022-05-13 | 安徽理工大学 | Analysis method and device capable of quantitatively measuring coal low-temperature oxidation gas generation amount |
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