CN106093338A - Down-hole reacting cycle sampling desorption of mash gas process simulation test device and method of testing - Google Patents
Down-hole reacting cycle sampling desorption of mash gas process simulation test device and method of testing Download PDFInfo
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- 238000003795 desorption Methods 0.000 title claims abstract description 51
- 238000005070 sampling Methods 0.000 title claims abstract description 48
- 238000012018 process simulation test Methods 0.000 title claims abstract description 18
- 238000010998 test method Methods 0.000 title claims description 6
- 239000007789 gas Substances 0.000 claims abstract description 135
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 97
- 239000003245 coal Substances 0.000 claims abstract description 63
- 238000000034 method Methods 0.000 claims abstract description 29
- 238000002347 injection Methods 0.000 claims abstract description 20
- 239000007924 injection Substances 0.000 claims abstract description 20
- 229910001873 dinitrogen Inorganic materials 0.000 claims abstract description 19
- 238000009849 vacuum degassing Methods 0.000 claims abstract description 18
- 238000012360 testing method Methods 0.000 claims abstract description 8
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 108
- 229910052757 nitrogen Inorganic materials 0.000 claims description 39
- 230000009466 transformation Effects 0.000 claims description 17
- 150000001875 compounds Chemical class 0.000 claims description 11
- 230000005611 electricity Effects 0.000 claims description 10
- 238000007872 degassing Methods 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 4
- 150000001335 aliphatic alkanes Chemical class 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 238000011160 research Methods 0.000 abstract description 6
- 230000009897 systematic effect Effects 0.000 abstract description 2
- 238000003556 assay Methods 0.000 abstract 1
- 238000012544 monitoring process Methods 0.000 description 4
- 238000001179 sorption measurement Methods 0.000 description 4
- 239000003034 coal gas Substances 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 206010001524 Ainhum Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
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Abstract
The present invention relates to a kind of down-hole reacting cycle sampling desorption of mash gas process simulation test device, vacuum degassing system is connected including high pressure gas gas injection system pipe, high pressure nitrogen gas charging system, feature is: after high pressure gas gas injection system pipe connects vacuum degassing system, pipe connects extraordinary pressure constant temperature desorption system, then pipe connects high pressure nitrogen gas charging system.Provide the method for testing of a kind of down-hole reacting cycle sampling desorption of mash gas process simulation test device simultaneously.Controllable coal seam of the present invention temperature, coal seam gas-bearing capacity, the reacting cycle tube sample boring degree of depth, reacting cycle sampling pressure monsoon intensity, reacting cycle tube sample boring are along external conditions such as Cheng Wendu, systematic research reacting cycle sampling process ickings desorption of mash gas rule and influence factor, construct reacting cycle sampling process hole along journey air pressure and the changing environment of temperature, it is provided that a kind of reacting cycle sampling from the bottom of hole to the assay method of desorption of mash gas rule the ickings flow process of aperture.
Description
Technical field
The present invention relates to down-hole reacting cycle sampling desorption of mash gas process simulation device and method, particularly to down-hole reacting cycle
Sampling desorption of mash gas process simulation test device and method of testing.
Background technology
Coal seam gas-bearing capacity is not only and is evaluated the important indicator that Coal Seam Outburst Hazard is strong and weak, is also assessment coal bed gas resource
The important parameter of the storage regularity of distribution, Accurate Determining coal seam gas-bearing capacity always coal gas adopts the important foundation research in field altogether.
Through the development of decades, coal seam gas-bearing capacity determination techniques achieves breakthrough achievement, and wherein, down-hole directly measures coal seam watt
This content method is most widely used, and measured value accuracy rate is high.Down-hole directly measures coal seam gas-bearing capacity technique and mainly includes sampling
Process losses amount, down-hole desorption quantity and experimental determination remaining quantity three parts.Down-hole desorption quantity and experimental determination remaining quantity
Be objective measured value, and loss amount be ickings after dactylolysis along at the bottom of hole to the gas amount of institute's desorbing loss during aperture.
Owing to technology is limited, the loss amount of sampling process cannot be surveyed, and can only push away by ickings initial stage desorption of mash gas rule is counter.
The sampling method that down-hole directly measures coal seam gas-bearing capacity conventional at present has: twist drill rods row's powder sampling, pressure wind take
Sample, reverse circulation drilling sampling, corer sampling.For improving results of measuring accuracy, national standard " GB/T 23250-2009 " is advised
Determine to must not exceed 5min sample time, i.e. fast sampling；It addition, gather sample must derive from precalculated position, it is ensured that fixed point takes
Sample.In above-mentioned sampling method, twist drill rods and pressure wind sampling all can not realize pinpointing purpose, although corer can accomplish that fixed point takes
Sample, but sample time is long, gas loss amount is big.Reacting cycle sampling is a kind of new method pinpointing fast sampling, the most applicable
Directly measure and the work such as gas outbursts Prediction index test in down-hole coal bed gas bearing capacity.Reacting cycle tube sample boring along journey
Pressure gradually decays to atmospheric pressure from initial blast maximum, shows as becoming the continuous attenuation state of extraordinary pressure, the gas in this stage
Adsorption law differs from the Desorption characteristics under atmospheric pressure environment, and in standard, the loss amount of regulation calculatesMethod is only applicable to normal pressure solution
Inhale environment, it is impossible to the loss amount meeting reacting cycle extraordinary pressure sampling process calculates.Therefore, research reacting cycle sampling process ickings watt
This adsorption law is to build to become the basis of gas loss amount prediction model under super atmospheric pressure environment, is also to improve reacting cycle sampling and measuring
Gas bearing capacity and the basic demand of Coal Seam Outburst Hazard index.
Summary of the invention
Present invention aim to overcome that prior art shortcoming, it is provided that a kind of down-hole reacting cycle sampling desorption of mash gas process simulation
Test device and method of testing, thus be reacting cycle sampling technique Accurate Determining coal seam gas-bearing capacity and mensuration Coal Outburst danger
Dangerous index provides crucial technological means.
The technical solution used in the present invention is: a kind of down-hole reacting cycle sampling desorption of mash gas process simulation test device, bag
Including high pressure gas gas injection system pipe and connect vacuum degassing system, high pressure nitrogen gas charging system, high pressure gas gas injection system includes band
Have the high pressure methane gas cylinder order pipe that methane gas cylinder switchs connect electromagnetic valve a, high voltage reference tank, pressure transducer I, electromagnetic valve b,
Electromagnetic valve c, emptying end, vacuum degassing system include vacuum air pump pipe respectively connect electromagnetic valve f and emptying end, vacuum gauge and
After compound vacuum gauge, then pipe connects electromagnetic valve d, and high pressure nitrogen gas charging system includes the high-pressure nitrogen bottle pipe with nitrogen cylinder switch
Connecting electromagnetic valve g, feature is: after high pressure gas gas injection system pipe connects vacuum degassing system, and pipe connects extraordinary pressure constant temperature solution
Desorption system, then pipe connection high pressure nitrogen gas charging system.
Wherein: extraordinary pressure constant temperature desorption system includes that pipe connects pressure transducer III, electronic control valve for small flows, electricity respectively
Dynamic three-way valve, transformation tank, electronic control valve for small flows order pipe connection traffic sensor, methane transducer, emptying end, electronic three
After logical valve pipe is connected at the coal sample tank being inserted with temperature sensor in perseverance/alternating temperature case, pipe connects pressure transducer II, then pipe connects
Electromagnetic valve e.
Wherein: PLC is electrically connected pressure transducer I, pressure transducer II, pressure transducer III, temperature sensor, electricity
Dynamic three-way valve, flow transducer, sensing methane concentration device, electronic control valve for small flows, electromagnetic valve a, electromagnetic valve b, electromagnetic valve c,
Electromagnetic valve d, electromagnetic valve e, electromagnetic valve f, electromagnetic valve g, computer.
The method of testing of a kind of down-hole reacting cycle sampling desorption of mash gas process simulation test device, including the coal sample that will be sieved
It is placed in drying baker dried, weighs and fill coal sample tank, coal sample tank is put into perseverance/alternating temperature case, and working seam temperature is set, close
After methane gas cylinder switch, open electromagnetic valve a, electromagnetic valve b, electromagnetic valve d, electromagnetic valve e by PLC, close electromagnetic valve c, electromagnetic valve
F, electric T-shaped valve, start vacuum air pump, to coal sample tank, high voltage reference tank and connection pipeline degassing, works as compound vacuum gauge
When display sets vacuum, close electromagnetic valve a, electromagnetic valve b, electromagnetic valve d, electromagnetic valve e and vacuum air pump, immediately open
Electromagnetic valve f, degassing terminates, and after opening methane gas cylinder switch, opens electromagnetic valve a, electromagnetic valve b, is filled with highly concentrated to high voltage reference tank
Degree methane, when pressure transducer I force value is setting value, closes electromagnetic valve a, methane gas cylinder switch, opens electromagnetic valve e, high pressure
Being filled with methane with reference to tank to coal sample tank coal sample, pressure transducer II force value is setting value, closes electromagnetic valve e, and gas injection terminates, electricity
Closed mode at dynamic three-way valve, electronic control valve for small flows, order opens nitrogen cylinder switch, electromagnetic valve g is filled with nitrogen to transformation tank
Gas, pressure transducer III force value is compressed-air system atmospheric pressure value under mine, closes electromagnetic valve g, nitrogen cylinder switch, and nitrogen has been inflated
Becoming, feature is: regulation electric T-shaped valve makes coal sample tank and atmosphere, free gas in release coal sample tank, treats pressure sensing
When device II force value is down to zero, regulation electric T-shaped valve makes coal sample tank connect with transformation tank again, opens the regulation of electronic low discharge
Valve, and controlling opening of valve, with nitrogen in down-hole reacting cycle depth selection spent time release transformation tank simultaneously, make that down-hole is counter to be followed
In ring depth selection spent time, initial ickings temperature is down to terminate ickings variations in temperature unanimously, and temporally node t is passed by flow
Sensor, sensing methane concentration device record mixed gas flow QtWith methane concentration C%.
Wherein: St=Qt× C%, StFor timing node t desorption of mash gas amount, ml/min；QtFor timing node t
Mixed gas flow, ml/min；C% is timing node t methane concentration, and then %, it is thus achieved that desorption of mash gas speed utilizes micro-
The accumulative desorption of mash gas amount of integral and calculating difference node.
Change coal sample particle diameter and just set temperature, the adsorption equilibrium pressure of coal sample, nitrogen initial pressure, nitrogen release time and
The temperature of temperature monitoring system becomes gradient, under the conditions of research different coal gas bearing capacity, coal seam temperature, depth selection, sampling blast
Reacting cycle sampling process in desorption of mash gas rule.
The beneficial effects of the present invention is: the present invention tests device controllable coal seam temperature, coal seam gas-bearing capacity, reacting cycle
The tube sample boring degree of depth, reacting cycle sampling pressure monsoon intensity, reacting cycle tube sample boring are along external conditions such as Cheng Wendu, and systematic research is anti-
Cycle sampling process ickings desorption of mash gas rule and influence factor, construct reacting cycle sampling process and hole along journey air pressure and temperature
Changing environment, it is provided that a kind of reacting cycle sampling from the bottom of hole to the mensuration side of desorption of mash gas rule the ickings flow process of aperture
Method.
Accompanying drawing explanation
Fig. 1 is the structural principle schematic diagram of the embodiment of the present invention；
Fig. 2 is embodiment of the present invention control principle schematic diagram.
In figure: 1. high pressure methane gas cylinder, 2. high voltage reference tank, 3. compound vacuum gauge, 4. vacuum gauge, 5. vacuum suction
Pump, 6. coal sample tank, 7. temperature sensor, 8. perseverance/alternating temperature case, 9. electric T-shaped valve, 10. high-pressure nitrogen bottle, 11. transformation tanks, 12.
Flow transducer, 13. sensing methane concentration devices, 14. electronic control valve for small flows, 15. pressure transducers I, 16. pressure transducers
II, 17. pressure transducers III, 18. electromagnetic valve a, 19. electromagnetic valve b, 20. electromagnetic valve c, 21. electromagnetic valve d, 22. electromagnetic valve e, 23.
Electromagnetic valve f, 24. electromagnetic valve g, 30. nitrogen cylinder switchs, 40. methane gas cylinder switches, 50. computers, 60.PLC.
Detailed description of the invention
First embodiment
See Fig. 1, Fig. 2, a kind of down-hole reacting cycle sampling desorption of mash gas process simulation test device, note including high pressure gas
Gas system pipes connects vacuum degassing system, and high pressure nitrogen gas charging system, high pressure gas gas injection system includes opening with methane gas cylinder
The high pressure methane gas cylinder 1 order pipe closing 40 connects electromagnetic valve a18, high voltage reference tank 2, pressure transducer I 15, electromagnetic valve b19, electricity
Magnet valve c20, emptying end, vacuum degassing system includes that vacuum air pump 5 pipe respectively connects electromagnetic valve f23 and emptying end, vacuum gauge
After pipe 4 and compound vacuum gauge 3, then pipe connects electromagnetic valve d21, and high pressure nitrogen gas charging system includes the height with nitrogen cylinder switch 30
Pressure nitrogen cylinder 10 pipe connects electromagnetic valve g24, and feature is: after high pressure gas gas injection system pipe connects vacuum degassing system, Guan Lian
Connect extraordinary pressure constant temperature desorption system, then pipe connects high pressure nitrogen gas charging system.
Second embodiment
See Fig. 1, Fig. 2, a kind of down-hole reacting cycle sampling desorption of mash gas process simulation test device, note including high pressure gas
Gas system pipes connects vacuum degassing system, and high pressure nitrogen gas charging system, high pressure gas gas injection system includes opening with methane gas cylinder
The high pressure methane gas cylinder 1 order pipe closing 40 connects electromagnetic valve a18, high voltage reference tank 2, pressure transducer I 15, electromagnetic valve b19, electricity
Magnet valve c20, emptying end, vacuum degassing system includes that vacuum air pump 5 pipe respectively connects electromagnetic valve f23 and emptying end, vacuum gauge
After pipe 4 and compound vacuum gauge 3, then pipe connects electromagnetic valve d21, and high pressure nitrogen gas charging system includes the height with nitrogen cylinder switch 30
Pressure nitrogen cylinder 10 pipe connects electromagnetic valve g24, and feature is: after high pressure gas gas injection system pipe connects vacuum degassing system, Guan Lian
Connect extraordinary pressure constant temperature desorption system, then pipe connects high pressure nitrogen gas charging system.
Wherein: extraordinary pressure constant temperature desorption system includes that pipe connects pressure transducer III 17, electronic control valve for small flows respectively
14, electric T-shaped valve 9, transformation tank 11, electronic control valve for small flows 14 order pipe connection traffic sensor 12, methane transducer
13, emptying end, after electric T-shaped valve 9 pipe is connected at the coal sample tank 6 being inserted with temperature sensor 7 in perseverance/alternating temperature case 8, pipe connects pressure
Force transducer II 16, then pipe connection electromagnetic valve e22.
3rd embodiment
See Fig. 1, Fig. 2, a kind of down-hole reacting cycle sampling desorption of mash gas process simulation test device, note including high pressure gas
Gas system pipes connects vacuum degassing system, and high pressure nitrogen gas charging system, high pressure gas gas injection system includes opening with methane gas cylinder
The high pressure methane gas cylinder 1 order pipe closing 40 connects electromagnetic valve a18, high voltage reference tank 2, pressure transducer I 15, electromagnetic valve b19, electricity
Magnet valve c20, emptying end, vacuum degassing system includes that vacuum air pump 5 pipe respectively connects electromagnetic valve f23 and emptying end, vacuum gauge
After pipe 4 and compound vacuum gauge 3, then pipe connects electromagnetic valve d21, and high pressure nitrogen gas charging system includes with nitrogen cylinder switch 30
High-pressure nitrogen bottle 10 pipe connects electromagnetic valve g24, and feature is: after high pressure gas gas injection system pipe connects vacuum degassing system, pipe
Connect extraordinary pressure constant temperature desorption system, then pipe connects high pressure nitrogen gas charging system.
Wherein: PLC60 is electrically connected pressure transducer I 15, pressure transducer II 16, pressure transducer III 17, temperature
Sensor 7, electric T-shaped valve 9, flow transducer 12, sensing methane concentration device 13, electronic control valve for small flows 14, electromagnetic valve
A18, electromagnetic valve b19, electromagnetic valve c20, electromagnetic valve d21, electromagnetic valve e22, electromagnetic valve f23, electromagnetic valve g24, computer 50.
4th embodiment
See Fig. 1, Fig. 2, a kind of down-hole reacting cycle sampling desorption of mash gas process simulation test device, note including high pressure gas
Gas system pipes connects vacuum degassing system, and high pressure nitrogen gas charging system, high pressure gas gas injection system includes opening with methane gas cylinder
The high pressure methane gas cylinder 1 order pipe closing 40 connects electromagnetic valve a18, high voltage reference tank 2, pressure transducer I 15, electromagnetic valve b19, electricity
Magnet valve c20, emptying end, vacuum degassing system includes that vacuum air pump 5 pipe respectively connects electromagnetic valve f23 and emptying end, vacuum gauge
After pipe 4 and compound vacuum gauge 3, then pipe connects electromagnetic valve d21, and high pressure nitrogen gas charging system includes the height with nitrogen cylinder switch 30
Pressure nitrogen cylinder 10 pipe connects electromagnetic valve g24, and feature is: after high pressure gas gas injection system pipe connects vacuum degassing system, Guan Lian
Connect extraordinary pressure constant temperature desorption system, then pipe connects high pressure nitrogen gas charging system.
Wherein: extraordinary pressure constant temperature desorption system includes that pipe connects pressure transducer III 17, electronic control valve for small flows respectively
14, electric T-shaped valve 9, transformation tank 11, electronic control valve for small flows 14 order pipe connection traffic sensor 12, methane transducer
13, emptying end, after electric T-shaped valve 9 pipe is connected at the coal sample tank 6 being inserted with temperature sensor 7 in perseverance/alternating temperature case 8, pipe connects pressure
Force transducer II 16, then pipe connection electromagnetic valve e22.
Wherein: PLC60 is electrically connected pressure transducer I 15, pressure transducer II 16, pressure transducer III 17, temperature
Sensor 7, electric T-shaped valve 9, flow transducer 12, sensing methane concentration device 13, electronic control valve for small flows 14, electromagnetic valve
A18, electromagnetic valve b19, electromagnetic valve c20, electromagnetic valve d21, electromagnetic valve e22, electromagnetic valve f23, electromagnetic valve g24, computer 50.
5th embodiment
Seeing Fig. 1, Fig. 2, reacting cycle sampling desorption of mash gas process simulation in a kind of down-hole tests the method for testing of device, including
The coal sample being sieved 1mm～3mm is placed in 110 DEG C of drying baker dried, weighs and fill coal sample tank 6, coal sample tank 6 is put into perseverance/change
Incubator 8, and working seam temperature is set, constant temperature 28 DEG C, after closing methane gas cylinder switch 40, open electromagnetic valve by PLC60
A18, electromagnetic valve b19, electromagnetic valve d21, electromagnetic valve e22, close electromagnetic valve c20, electromagnetic valve f23, electric T-shaped valve 9, starts true
Empty air pump 5, to coal sample tank 6, high voltage reference tank 2 and connection pipeline degassing, when compound vacuum gauge 3 display sets vacuum
During 10Pa, close electromagnetic valve a18, electromagnetic valve b19, electromagnetic valve d21, electromagnetic valve e22 and vacuum air pump 5, immediately open
Electromagnetic valve f23, degassing terminates, and after opening methane gas cylinder switch 40, opens electromagnetic valve a18, electromagnetic valve b19, to high voltage reference tank 2
It is filled with high concentration 99.99% methane, when pressure transducer I 15 force value is setting value 4.5MPa, closes electromagnetic valve a18, methane
Gas cylinder switch 40, opens electromagnetic valve e22, and high voltage reference tank 2 is filled with methane, pressure transducer II 16 pressure to coal sample tank 6 coal sample
Value is setting value 1.5MPa, closes electromagnetic valve e22, and gas injection terminates, and closes at electric T-shaped valve 9, electronic control valve for small flows 14
State, order opens nitrogen cylinder switch 30, electromagnetic valve g24 is filled with nitrogen to transformation tank 11, and pressure transducer III 17 force value is
Compressed-air system atmospheric pressure value 0.6MPa under mine, closes electromagnetic valve g24, nitrogen cylinder switch 30, and nitrogen has been inflated, and feature is:
Regulation electric T-shaped valve 9 makes coal sample tank 6 and atmosphere, free gas in release coal sample tank, treats pressure transducer II 16 pressure
When value is down to zero, regulation electric T-shaped valve 9 makes coal sample tank 6 connect with transformation tank 11 again, opens electronic control valve for small flows 14,
And controlling opening of valve, with nitrogen in down-hole reacting cycle depth selection 100m spent time 90s release transformation tank 11 simultaneously, make well
In lower reacting cycle depth selection 100m spent time 90s, initial ickings temperature 28 DEG C is down to terminate ickings temperature 25 DEG C change one
Causing, both the temperature drop gradient of design temperature monitoring system was 0.033 DEG C/s, and temporally node t is by flow transducer 12, methane concentration
Sensor 13 records mixed gas flow QtWith methane concentration C%.
Sixth embodiment
Seeing Fig. 1, Fig. 2, reacting cycle sampling desorption of mash gas process simulation in a kind of down-hole tests the method for testing of device, including
The coal sample being sieved 1mm～3mm is placed in 110 DEG C of drying baker dried, weighs and fill coal sample tank 6, coal sample tank 6 is put into perseverance/change
Incubator 8, and working seam temperature is set, constant temperature 28 DEG C, after closing methane gas cylinder switch 40, open electromagnetic valve by PLC60
A18, electromagnetic valve b19, electromagnetic valve d21, electromagnetic valve e22, close electromagnetic valve c20, electromagnetic valve f23, electric T-shaped valve 9, starts true
Empty air pump 5, to coal sample tank 6, high voltage reference tank 2 and connection pipeline degassing, when compound vacuum gauge 3 display sets vacuum
During 10Pa, close electromagnetic valve a18, electromagnetic valve b19, electromagnetic valve d21, electromagnetic valve e22 and vacuum air pump 5, immediately open
Electromagnetic valve f23, degassing terminates, and after opening methane gas cylinder switch 40, opens electromagnetic valve a18, electromagnetic valve b19, to high voltage reference tank 2
It is filled with high concentration 99.99% methane, when pressure transducer I 15 force value is setting value 4.5MPa, closes electromagnetic valve a18, methane
Gas cylinder switch 40, opens electromagnetic valve e22, and high voltage reference tank 2 is filled with methane, pressure transducer II 16 pressure to coal sample tank 6 coal sample
Value is setting value 1.5MPa, closes electromagnetic valve e22, and gas injection terminates, and closes at electric T-shaped valve 9, electronic control valve for small flows 14
State, order opens nitrogen cylinder switch 30, electromagnetic valve g24 is filled with nitrogen to transformation tank 11, and pressure transducer III 17 force value is
Compressed-air system atmospheric pressure value 0.6MPa under mine, closes electromagnetic valve g24, nitrogen cylinder switch 30, and nitrogen has been inflated, and feature is:
Regulation electric T-shaped valve 9 makes coal sample tank 6 and atmosphere, free gas in release coal sample tank, treats pressure transducer II 16 pressure
When value is down to zero, regulation electric T-shaped valve 9 makes coal sample tank 6 connect with transformation tank 11 again, opens electronic control valve for small flows 14,
And controlling opening of valve, with nitrogen in down-hole reacting cycle depth selection 100m spent time 90s release transformation tank 11 simultaneously, make well
In lower reacting cycle depth selection 100m spent time 90s, initial ickings temperature 28 DEG C is down to terminate ickings temperature 25 DEG C change one
Causing, both the temperature drop gradient of design temperature monitoring system was 0.033 DEG C/s, and temporally node t is by flow transducer 12, methane concentration
Sensor 13 records mixed gas flow QtWith methane concentration C%.
Wherein: St=Qt× C%, StFor timing node t desorption of mash gas amount, ml/min；QtFor timing node t
Mixed gas flow, ml/min；C% is timing node t methane concentration, and then %, it is thus achieved that desorption of mash gas speed utilizes micro-
The accumulative desorption of mash gas amount of integral and calculating difference node.
Change coal sample particle diameter and just set temperature, the adsorption equilibrium pressure of coal sample, nitrogen initial pressure, nitrogen release time and
The temperature of temperature monitoring system becomes gradient, under the conditions of research different coal gas bearing capacity, coal seam temperature, depth selection, sampling blast
Reacting cycle sampling process in desorption of mash gas rule.
Claims (6)
1. a down-hole reacting cycle sampling desorption of mash gas process simulation test device, connects true including high pressure gas gas injection system pipe
Empty degassing system, high pressure nitrogen gas charging system, high pressure gas gas injection system includes the high pressure methane gas with methane gas cylinder switch
Bottle order pipe connects electromagnetic valve a, high voltage reference tank, pressure transducer I, electromagnetic valve b, electromagnetic valve c, emptying end, vacuum outgas system
After system includes that vacuum air pump pipe respectively connects electromagnetic valve f and emptying end, vacuum gauge and compound vacuum gauge, then pipe connects electromagnetism
Valve d, high pressure nitrogen gas charging system includes connecting electromagnetic valve g with the high-pressure nitrogen bottle pipe of nitrogen cylinder switch, is characterised by: high pressure
After gas gas injection system pipe connects vacuum degassing system, pipe connects extraordinary pressure constant temperature desorption system, then pipe connects high pressure nitrogen and fills
Gas system.
A kind of down-hole the most according to claim 1 reacting cycle sampling desorption of mash gas process simulation test device, its feature exists
In: wherein: extraordinary pressure constant temperature desorption system include respectively pipe connect pressure transducer III, electronic control valve for small flows, electronic three
Logical valve, transformation tank, electronic control valve for small flows order pipe connection traffic sensor, methane transducer, emptying end, electric T-shaped valve
After pipe is connected at the coal sample tank being inserted with temperature sensor in perseverance/alternating temperature case, pipe connects pressure transducer II, then pipe connects electromagnetism
Valve e.
A kind of down-hole the most according to claim 1 reacting cycle sampling desorption of mash gas process simulation test device, its feature exists
In: PLC be electrically connected pressure transducer I, pressure transducer II, pressure transducer III, temperature sensor, electric T-shaped valve,
Flow transducer, sensing methane concentration device, electronic control valve for small flows, electromagnetic valve a, electromagnetic valve b, electromagnetic valve c, electromagnetic valve d, electricity
Magnet valve e, electromagnetic valve f, electromagnetic valve g, computer.
A kind of down-hole the most according to claim 2 reacting cycle sampling desorption of mash gas process simulation test device, its feature exists
In: PLC be electrically connected pressure transducer I, pressure transducer II, pressure transducer III, temperature sensor, electric T-shaped valve,
Flow transducer, sensing methane concentration device, electronic control valve for small flows, electromagnetic valve a, electromagnetic valve b, electromagnetic valve c, electromagnetic valve d, electricity
Magnet valve e, electromagnetic valve f, electromagnetic valve g, computer.
5. a method of testing for down-hole reacting cycle sampling desorption of mash gas process simulation test device, puts including by the coal sample being sieved
Dried in drying baker, weigh and fill coal sample tank, coal sample tank is put into perseverance/alternating temperature case, and working seam temperature is set, close first
After alkane gas cylinder switch, open electromagnetic valve a, electromagnetic valve b, electromagnetic valve d, electromagnetic valve e by PLC, close electromagnetic valve c, electromagnetic valve f,
Electric T-shaped valve, starts vacuum air pump, to coal sample tank, high voltage reference tank and connection pipeline degassing, when compound vacuum gauge shows
When showing setting vacuum, close electromagnetic valve a, electromagnetic valve b, electromagnetic valve d, electromagnetic valve e and vacuum air pump, immediately open electricity
Magnet valve f, degassing terminates, and after opening methane gas cylinder switch, opens electromagnetic valve a, electromagnetic valve b, is filled with high concentration to high voltage reference tank
Methane, when pressure transducer I force value is setting value, closes electromagnetic valve a, methane gas cylinder switch, opens electromagnetic valve e, and high pressure is joined
Examining tank and be filled with methane to coal sample tank coal sample, pressure transducer II force value is setting value, closes electromagnetic valve e, and gas injection terminates, electronic
Closed mode at three-way valve, electronic control valve for small flows, order opens nitrogen cylinder switch, electromagnetic valve g is filled with nitrogen to transformation tank,
Pressure transducer III force value is compressed-air system atmospheric pressure value under mine, closes electromagnetic valve g, nitrogen cylinder switch, and nitrogen has been inflated,
It is characterised by: regulation electric T-shaped valve makes coal sample tank and atmosphere, free gas in release coal sample tank, treats pressure transducer II
When force value is down to zero, regulation electric T-shaped valve makes coal sample tank connect with transformation tank again, opens electronic control valve for small flows, and
Controlling opening of valve, with nitrogen in down-hole reacting cycle depth selection spent time release transformation tank simultaneously, makes down-hole reacting cycle take
In sample degree of depth spent time, to be down to terminate ickings variations in temperature consistent for initial ickings temperature, temporally node t by flow transducer,
Sensing methane concentration device record mixed gas flow QtWith methane concentration C%.
The test side of a kind of down-hole the most according to claim 5 reacting cycle sampling desorption of mash gas process simulation test device
Method, is characterised by: St=Qt× C%, StFor timing node t desorption of mash gas amount, ml/min；QtMix for timing node t
Close gas flow, ml/min；C% is timing node t methane concentration, %, it is thus achieved that desorption of mash gas speed, then utilizes micro-long-pending
Divide the accumulative desorption of mash gas amount calculating different nodes.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106593381A (en) * | 2017-01-19 | 2017-04-26 | 安徽理工大学 | Device and method for testing influence of gas injection on desorption and seepage of coal bed methane in coal rock |
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| CN106593381B (en) * | 2017-01-19 | 2022-09-09 | 安徽理工大学 | Device and method for testing influence of gas injection on desorption seepage of coal bed gas in coal rock |
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| CN107748081A (en) * | 2017-09-30 | 2018-03-02 | 河南理工大学 | Simulate coal core desorption of mash gas device and test device and method in low temperature location of the coring procedure |
| CN107703023A (en) * | 2017-09-30 | 2018-02-16 | 河南理工大学 | A kind of surface drilling coal core modeled pressure drop desorption apparatus and test device and method |
| CN110297066A (en) * | 2019-07-15 | 2019-10-01 | 中国船舶重工集团公司第七一八研究所 | A kind of VOCs concentration on-line measurement device |
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| CN110749720A (en) * | 2019-09-29 | 2020-02-04 | 华北科技学院 | Simulation experiment device for researching gas desorption rule under condition of wind flow driving coal migration |
| CN110749720B (en) * | 2019-09-29 | 2022-01-04 | 华北科技学院 | Simulation experiment device for researching gas desorption rule under condition of wind flow driving coal migration |
| CN111982567A (en) * | 2020-08-17 | 2020-11-24 | 中煤科工集团重庆研究院有限公司 | Construction method of gas loss compensation model in deep hole reverse circulation sampling process |
| CN111982567B (en) * | 2020-08-17 | 2024-02-02 | 中煤科工集团重庆研究院有限公司 | Method for constructing gas loss compensation model in deep hole reverse circulation sampling process |
| CN114280269A (en) * | 2021-11-17 | 2022-04-05 | 中国煤炭地质总局地球物理勘探研究院 | Testing device and method for eliminating methane quantity by using gas desolventizer |
| CN114280269B (en) * | 2021-11-17 | 2024-04-26 | 中国煤炭地质总局地球物理勘探研究院 | Testing device and method for eliminating methane amount of gas desolventizing agent |
| CN115824283A (en) * | 2022-11-14 | 2023-03-21 | 山东省科学院激光研究所 | Testing system for simulating oil and gas downhole environment |
| CN115824283B (en) * | 2022-11-14 | 2024-09-24 | 山东省科学院激光研究所 | Test system for simulating underground environment of oil and gas |
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