CN107449847A - The chromatography of Period of Coal Seam Spontaneous Combustion symbolic gas and index preferably determine device - Google Patents
The chromatography of Period of Coal Seam Spontaneous Combustion symbolic gas and index preferably determine device Download PDFInfo
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- CN107449847A CN107449847A CN201710834897.1A CN201710834897A CN107449847A CN 107449847 A CN107449847 A CN 107449847A CN 201710834897 A CN201710834897 A CN 201710834897A CN 107449847 A CN107449847 A CN 107449847A
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- G—PHYSICS
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- 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
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Abstract
The invention discloses a kind of Period of Coal Seam Spontaneous Combustion symbolic gas chromatography and index preferably to determine device, including a temperature-controlled box, a coal sample tank is provided with described temperature-controlled box, the bottom of the coal sample tank is provided with air inlet pipe, described air inlet pipe is connected with the gas handling system being arranged on outside temperature-controlled box, and the appendix of gas handling system enters rear connection economizer bank, described economizer bank in temperature-controlled box and is connected again with air inlet pipe；The top of coal sample tank is provided with an escape pipe, and described escape pipe is connected with gas chromatograph；The temperature sensor I for detecting temperature in coal sample tank is fitted with described coal sample tank, temperature sensor II is provided with the temperature-controlled box, described temperature sensor I, temperature sensor II is connected with controller, controller monitors temperature-controlled box and coal sample tank temperature change and recorded according to the temperature in the temperature control temperature-controlled box of detection.
Description
Technical field
The present invention relates to a kind of equipment for determining Period of Coal Seam Spontaneous Combustion symbolic gas, and in particular to Period of Coal Seam Spontaneous Combustion
Symbolic gas chromatography and index preferably determine device.
Background technology
Spontaneous combustion of coal seam is a kind of natural calamity of serious threat safety of coal mines.Flame caused by spontaneous combustion of coal seam and high temperature are not only
Directly the person and equipment are damaged, it is also possible to cause gas, coal-dust explosion, disaster is further exacerbated by and is expanded, cause
The heavy damage of production equipment, production environment and coal resources.Spontaneous combustion of coal is a slow oxidizing process, with oxygen
The development of change process, the gas of series reaction Coal Spontaneous Combustion Characteristics will be produced.With the rise of temperature, the generation of various gases
Significant changes occur for amount.Therefore, in order to avoid blindness in fire integrated preventing and treating, accomplish effective, reliable and proactive, lead to
The change using particular device measure gas yield is crossed, it is natural to the early stage of coal so as to the spontaneous fire symbolic gas of preferred coal
The research of ignition prediction technology is most important.
The content of the invention
The invention provides a kind of Period of Coal Seam Spontaneous Combustion symbolic gas chromatography and index preferably to determine device, this dress
Coal spontaneous ignition experimentation can be simulated by putting, and each temperature section gaseous product species in mensuration program temperature-rise period, yield and
Coal sample temperature variation characteristic, the spontaneous fire symbolic gas and its index preferably used accordingly.
To achieve the above object, the present apparatus adopts the following technical scheme that：
A kind of Period of Coal Seam Spontaneous Combustion symbolic gas chromatography and index preferably determine device, including a temperature-controlled box,
A coal sample tank is provided with described temperature-controlled box, the bottom of the coal sample tank is provided with air inlet pipe, described air inlet pipe and setting
Gas handling system outside temperature-controlled box is connected, and the appendix of gas handling system enters rear connection economizer bank in temperature-controlled box, described
Economizer bank is connected with air inlet pipe again；The top of the coal sample tank is provided with an escape pipe, described escape pipe and gas chromatograph
It is connected；The temperature sensor I for detecting temperature in coal sample tank is fitted with described coal sample tank, is set in the temperature-controlled box
There is temperature sensor II, described temperature sensor I, temperature sensor II are connected with controller, and described controller is according to inspection
Temperature in the temperature control temperature-controlled box of survey, while monitor temperature-controlled box and coal sample tank temperature change and record.
Further, fan and heater, described fan and heater and controller phase are provided with described temperature-controlled box
Even.
Further, the temperature control chamber interior wall is equiped with insulating layer of asbestos, energy between stainless steel, inner and outer wall
Enough realize two kinds of constant temperature, temperature programming methods of operation.Its 0.1 DEG C/min~30 DEG C of programmed rate/min, controllable temperature model
It is ± 0.2 DEG C to enclose for room temperature~400 DEG C, temperature-controlled precision, and the preheating copper pipe is external diameter 2mm, internal diameter 1mm, and length 50m's is pure
Copper material；
Further, the heater and fan are placed in temperature control upper box part.
Further, shown temperature sensor I is placed in the middle part of coal sample tank, at coal sample geometric center, and is connected with controller；
The controller carries out temperature programming control and records
Further, the gas chromatograph can analyze O2、N2、CO、CO2、CH4、C2H6、C3H8、C2H4、 C3H6、C2H2。
Further, the air supply system includes dry air bottle, pressure-reducing valve, pressure maintaining valve, flow stabilizing valve, pressure gauge, vapour lock, stream
Quantity sensor；The pressure-reducing valve, pressure maintaining valve and dry air bottle connect；The flow stabilizing valve, pressure gauge, vapour lock and flow sensor lead to
Red copper pipeline is crossed to be connected with the preheating copper pipe being arranged in temperature-controlled box；The preheating copper pipe is external diameter 2mm, internal diameter 1mm, length
50m fine copper material.
Further, the air inlet pipe, escape pipe and coal sample tank body are the good fine copper material of heat-conductive characteristic；It is described enter
Tracheae is flexibly connected below coal sample tank body；The escape pipe is flexibly connected above coal sample tank body.
Further, screens is set in described coal sample tank upper and lower part, for placing gauze pad, in coal sample top uniform fold
One layer of asbestos, are filtered to air-flow, prevent from blocking gas circuit.
Advantageous effects caused by the present invention：
1) coal sample tank
The coal sample tank is the thick fine copper materials of 1mm, is placed in temperature-controlled box, is connected, ensures with preheating copper pipe
The balance of coal sample pot temperature and temperature control the temperature inside the box；Tank body upper-lower position sets detachable outlet, inlet hole, is convenient for changing coal
Sample.Air admission hole is placed in coal sample tank base, ensure that the air-flow after preheated copper pipe preheating can ensure uniformly through prepackage coal sample
The oxygen supply condition of coal sample oxidation heating.Gas outlet is placed in coal sample tank body top, beneficial to caused various gases in time through outlet
Hole is discharged, and is introduced chromatography of gases and is carried out gas sample component analysis.Screens is set in coal sample tank top and the bottom, for placing gauze pad, in coal sample
One layer of asbestos of top uniform fold, are filtered to air-flow, prevent from blocking gas circuit.Platinum is connected in the middle part of coal sample tank at geometric position
Electric resistance sensor is used to monitor coal sample temperature change.
2) temperature control system
The system mainly includes controller, temperature-controlled box, temperature sensor, preheating copper pipe, heater, fan etc..
External diameter 2mm, internal diameter 1mm, length 50m preheating copper pipe ensure that the temperature into coal sample tank interior air-flow is fully pre-
Heat, reduce the error because of caused by intake air temperature and coal sample tank Nei Wenduyin temperature differences.Controller can carry out temperature programming setting,
Temperature-controlled box heats up from room temperature start program, room temperature~100 DEG C, and heating rate is 0.5 DEG C/min, and 100 DEG C~200 DEG C, heating is fast
Rate is 1.0 DEG C/min, and 200 DEG C~350 DEG C, heating rate is 2.0 DEG C/min.Setting side of the heating schedule to heating rate
Just it is quick, and heating rate required in different temperatures section is ensure that, it ensure that the temperature change requirement of coal sample temperature programming.Temperature
Degree sensor is monitored to the temperature in temperature-controlled box and coal sample tank, intuitively easily reflects different time sections temperature-controlled box and coal
Temperature change between sample tank, the oxidation reaction situation of coal sample in coal sample tank is grasped in time.
3) automatic sampling system
Caused gas is drawn through venthole in coal sample tank, can be straight directly with gas chromatograph sampling valve UNICOM after drying
Access gas chromatograph and carry out gas sample component analysis, sample injection time is fast, realizes circulation and takes caused gas sample in coal sample tank
Requirement.
Brief description of the drawings
Further clear complete explanation is done to the present invention below in conjunction with specific embodiment：
The structural representation that it is the present apparatus that Fig. 1, which is,.
In figure：1- dry air bottles, 2- pressure-reducing valves, 3- pressure maintaining valves, 4- flow stabilizing valves, 5- pressure gauges, 6- vapour locks, 7- flows pass
Sensor, 8- thermal insulation layers, 9- temperature-controlled boxs, 10- preheating copper pipes, 11- air inlet pipe, 12- escape pipes, 13- coal sample tanks, 14- RTD temperature
Spend sensor, 15- fans, 16- heaters, 17- controllers and keyboard, 18- gas chromatographs.
Embodiment
It is noted that described further below is all exemplary, it is intended to provides further instruction to the application.It is unless another
Indicate, all technologies used herein and scientific terminology are with usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative
It is also intended to include plural form, additionally, it should be understood that, when in this manual using term "comprising" and/or " bag
Include " when, it indicates existing characteristics, step, operation, device, component and/or combinations thereof.
As background technology is introduced, spontaneous combustion of coal seam is a kind of natural calamity of serious threat safety of coal mines.Coal seam is certainly
Flame caused by combustion and high temperature not only directly damage to the person and equipment, it is also possible to cause gas, coal-dust explosion, make disaster
It is further exacerbated by and expands, causes the heavy damage of production equipment, production environment and coal resources.Spontaneous combustion of coal is one
Slow oxidizing process, with the development of oxidizing process, the gas of series reaction Coal Spontaneous Combustion Characteristics will be produced.With temperature
Rise, significant changes occur for the yields of various gases.Therefore, in order to avoid blindness in fire integrated preventing and treating, accomplish
Effectively, it is reliable and proactive, the change of gas yield is determined by using particular device, so as to the spontaneous fire of preferred coal
Research of the symbolic gas to the early stage prediction of spontaneous combustion forecasting technique of coal is most important, in order to solve technical problem as above,
Present applicant proposes a kind of Period of Coal Seam Spontaneous Combustion symbolic gas chromatography and index preferably to determine device.
The chromatography of Period of Coal Seam Spontaneous Combustion symbolic gas and index as shown in Figure 1 preferably determines device, including supply
System, coal sample tank, temperature-controlled box, temperature control and record, automatic sampling system, gas chromatograph, data processing with record etc.；
The air supply system includes dry air bottle 1, pressure-reducing valve 2, pressure maintaining valve 3, flow stabilizing valve 4, pressure gauge 5, vapour lock 6, flow
Sensor 7.The pressure-reducing valve, pressure maintaining valve and dry air bottle connect；The flow stabilizing valve, pressure gauge, vapour lock and flow sensor lead to
Red copper pipeline is crossed to be connected with preheating copper pipe；The preheating copper pipe is external diameter 2mm, internal diameter 1mm, length 50m fine copper material；
The coal sample tank 13 includes air inlet pipe 11, escape pipe 12 and coal sample tank body, the air inlet pipe 11, escape pipe 12 and coal
Sample tank body is the good fine copper material of heat-conductive characteristic；The air inlet pipe 11 is flexibly connected below coal sample tank body；The outlet
Pipe 12 is flexibly connected above coal sample tank body；
The temperature-controlled box includes preheating copper pipe 10, heater 16, temperature sensor 14, fan 15 and thermal insulation layer 8；The control
The inwall of incubator 9 is equiped with insulating layer of asbestos between stainless steel, inner and outer wall, can realize constant temperature, temperature programming two
The kind method of operation.Its 0.1 DEG C/min~30 DEG C of programmed rate/min, controllable temperature scope are room temperature~400 DEG C, and temperature control is smart
Spend for ± 0.2 DEG C, the preheating copper pipe is external diameter 2mm, internal diameter 1mm, length 50m fine copper material；The heater and fan
It is placed in temperature control upper box part；The temperature sensor is connected with controller, is monitored temperature-controlled box and coal sample tank temperature change and is recorded；
The temperature control includes platinum resistance temperature sensor 14 and controller 17 with record.Shown platinum resistance temperature sensing
Device is placed in the middle part of coal sample tank, at coal sample geometric center, and is connected with controller；The controller carries out temperature programming control and remembered
Record；
The automatic sampling system is directly connected to by escape pipe and gas chromatograph 18；
The gas chromatograph 18 can analyze O2、N2、CO、CO2、CH4、C2H6、C3H8、C2H4、 C3H6、C2H2。
The data processing and be recorded as computer processing.
Dry air bottle 1 passes through pressure-reducing valve 2, pressure maintaining valve 3, flow stabilizing valve 4, pressure gauge 5, vapour lock 6 and flow sensor 7 and preheating
Copper pipe 10 connects, and ensures the stabilization of air-flow.
Preheating copper pipe 10 is connected by air inlet pipe 11 with coal sample tank 13, and various gases caused by coal sample tank 13 pass through escape pipe
12 are introduced into gas chromatograph 18, carry out gas composition analysis.
The effect for being placed in the heater 16 and fan 15 of temperature control upper box part is so that the temperature in control cabinet is uniform.Platinum temperature
Degree sensor 14 is connected with controller 17, and it monitors temperature change in coal sample tank.
The operation sequence of the present apparatus is：
1) hunt leak.After gas circuit connects, gas circuit leak detection is carried out, in addition, should also carry out system inspection when gas circuit changes
Leakage.
2) flow measurement.Measured using soap film flowmeter from gas outlet position.
3) temperature sensor, the running status of data collecting system are checked.
4) debugging calibration is carried out to gas chromatograph.
5) confirm that gas circuit is good, after various pertinent instruments normal operations, coal sample to be measured is fitted into coal sample tank, above coal sample
One layer of asbestos of uniform fold, are filtered to air-flow, prevent from blocking gas circuit.
6) after filling sample, instrument air-tightness is checked again for.
7) dry air (oxygen concentration 20.95%), while temperature control are passed through into coal sample tank with 100ml/min regime flow
Case heats up from room temperature start program, room temperature~100 DEG C, and heating rate is 0.5 DEG C/min, 100 DEG C~200 DEG C, and heating rate is
1.0 DEG C/min, 200 DEG C~350 DEG C, heating rate is 2.0 DEG C/min.
8) gas sample will be produced and introduces gas chromatograph, and analyze each component concentration.
Although above-mentioned the embodiment of the present invention is described with reference to accompanying drawing, model not is protected to the present invention
The limitation enclosed, one of ordinary skill in the art should be understood that on the basis of technical scheme those skilled in the art are not
Need to pay various modifications or deformation that creative work can make still within protection scope of the present invention.
Claims (10)
1. the chromatography of Period of Coal Seam Spontaneous Combustion symbolic gas and index preferably determine device, it is characterised in that including a control
Incubator, is provided with a coal sample tank in described temperature-controlled box, and the bottom of the coal sample tank is provided with air inlet pipe, described air inlet pipe with
The gas handling system being arranged on outside temperature-controlled box is connected, and the appendix of gas handling system enters rear connection economizer bank, institute in temperature-controlled box
The economizer bank stated is connected with air inlet pipe again；The top of the coal sample tank is provided with an escape pipe, described escape pipe and meteorological color
Spectrometer is connected；The temperature sensor I for detecting temperature in coal sample tank is fitted with described coal sample tank, in the temperature-controlled box
It is interior to be connected provided with temperature sensor II, described temperature sensor I, temperature sensor II with controller, described controller root
According to the temperature in the temperature control temperature-controlled box of detection, while monitor temperature-controlled box and coal sample tank temperature change and record.
2. Period of Coal Seam Spontaneous Combustion symbolic gas chromatography as claimed in claim 1 and index preferably determine device, it is special
Sign is, is provided with fan and heater in described temperature-controlled box, described fan and heater are connected with controller.
3. Period of Coal Seam Spontaneous Combustion symbolic gas chromatography as claimed in claim 2 and index preferably determine device, it is special
Sign is that the temperature control chamber interior wall is equiped with insulating layer of asbestos between stainless steel, inner and outer wall, can realize perseverance
Two kinds of temperature, temperature programming methods of operation.
4. Period of Coal Seam Spontaneous Combustion symbolic gas chromatography as claimed in claim 2 and index preferably determine device, it is special
Sign is that the heater and fan are placed in temperature control upper box part.
5. Period of Coal Seam Spontaneous Combustion symbolic gas chromatography as claimed in claim 1 and index preferably determine device, it is special
Sign is that shown temperature sensor I is placed at the coal sample geometric center in the middle part of coal sample tank, and is connected with controller；The control
Device carries out temperature programming control and recorded.
6. Period of Coal Seam Spontaneous Combustion symbolic gas chromatography as claimed in claim 1 and index preferably determine device, it is special
Sign is that the gas chromatograph can analyze O2、N2、CO、CO2、CH4、C2H6、C3H8、C2H4、C3H6、C2H2。
7. Period of Coal Seam Spontaneous Combustion symbolic gas chromatography as claimed in claim 1 and index preferably determine device, it is special
Sign is that the air supply system includes dry air bottle, pressure-reducing valve, pressure maintaining valve, flow stabilizing valve, pressure gauge, vapour lock, flow sensor；
The pressure-reducing valve, pressure maintaining valve and dry air bottle connect；The flow stabilizing valve, pressure gauge, vapour lock and flow sensor pass through copper tube
Road is connected with the preheating copper pipe being arranged in temperature-controlled box.
8. Period of Coal Seam Spontaneous Combustion symbolic gas chromatography as claimed in claim 1 and index preferably determine device, it is special
Sign is, the preheating copper pipe is external diameter 2mm, internal diameter 1mm, length 50m fine copper material.
9. Period of Coal Seam Spontaneous Combustion symbolic gas chromatography as claimed in claim 1 and index preferably determine device, it is special
Sign is that the air inlet pipe, escape pipe and coal sample tank body are the good fine copper material of heat-conductive characteristic；The air inlet pipe is in coal sample
Below tank body, it is flexibly connected；The escape pipe is flexibly connected above coal sample tank body.
10. Period of Coal Seam Spontaneous Combustion symbolic gas chromatography as claimed in claim 1 and index preferably determine device, it is special
Sign is, screens is set in described coal sample tank upper and lower part, and for placing gauze pad, on coal sample top, one layer of asbestos of uniform fold, right
Air-flow is filtered, and prevents from blocking gas circuit.
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| CN201710834897.1A CN107449847A (en) | 2017-09-15 | 2017-09-15 | The chromatography of Period of Coal Seam Spontaneous Combustion symbolic gas and index preferably determine device |
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| CN201710834897.1A CN107449847A (en) | 2017-09-15 | 2017-09-15 | The chromatography of Period of Coal Seam Spontaneous Combustion symbolic gas and index preferably determine device |
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Cited By (3)
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|---|---|---|---|---|
| CN108459048A (en) * | 2017-12-19 | 2018-08-28 | 西安科技大学 | A kind of analyzer and analysis method for coal petrography spontaneous combustion oxidation specificity analysis |
| CN109628145A (en) * | 2019-01-27 | 2019-04-16 | 河南理工大学 | A kind of coal isothermal reaction experimental provision |
| CN114200043A (en) * | 2021-12-01 | 2022-03-18 | 中煤科工集团沈阳研究院有限公司 | Coal spontaneous combustion mark gas detection system and method and gas storage device thereof |
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