CN110160939A - A kind of three axis seepage apparatus and operating method changing mixed gas electric field and humidity - Google Patents
A kind of three axis seepage apparatus and operating method changing mixed gas electric field and humidity Download PDFInfo
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- CN110160939A CN110160939A CN201910600075.6A CN201910600075A CN110160939A CN 110160939 A CN110160939 A CN 110160939A CN 201910600075 A CN201910600075 A CN 201910600075A CN 110160939 A CN110160939 A CN 110160939A
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- 230000005684 electric field Effects 0.000 title claims abstract description 39
- 238000011017 operating method Methods 0.000 title claims abstract description 8
- 239000003245 coal Substances 0.000 claims abstract description 41
- 238000009849 vacuum degassing Methods 0.000 claims abstract description 14
- 238000002474 experimental method Methods 0.000 claims description 12
- 230000000694 effects Effects 0.000 claims description 8
- 238000012360 testing method Methods 0.000 claims description 8
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 238000012669 compression test Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 3
- 238000001764 infiltration Methods 0.000 claims 1
- 230000008595 infiltration Effects 0.000 claims 1
- 230000001105 regulatory effect Effects 0.000 claims 1
- 238000005065 mining Methods 0.000 abstract description 5
- 238000004088 simulation Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 91
- 230000035699 permeability Effects 0.000 description 11
- 239000011435 rock Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000008246 gaseous mixture Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000203 mixture 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
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
- G01N15/0826—Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
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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
- G01N33/22—Fuels; Explosives
- G01N33/222—Solid fuels, e.g. coal
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N2015/0866—Sorption
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- Life Sciences & Earth Sciences (AREA)
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Abstract
The invention discloses a kind of three axis seepage apparatus and operating method for changing mixed gas electric field and humidity, it includes mixed gas feed system and gas mixing system, and mixed gas feed system and gas mixing system pass through piping connection；Gas mixing system and triaxial pressure system pass through piping connection；Triaxial pressure system and vacuum degassing system pass through piping connection；Vacuum degassing system and flow measuring systems pass through piping connection；It is characterized by: the outside of the triaxial cell (13) of the triaxial pressure system is equipped with electric field generator (14)；Gas mixing system includes gas mixing chamber (10), and steam generator (9) and gas mixing chamber (10) pass through piping connection；Solve the technical problems such as the variation of three axis seepage apparatus simulation coal mining scene mixed gas humidity of the not changeable mixed gas humidity of the prior art and extra electric field.
Description
Technical field
The invention belongs to seepage flow technical field more particularly to a kind of three axis seepage flow dresses for changing mixed gas electric field and humidity
It sets and operating method.
Background technique
The coal resources of the rich reserves in China contain a large amount of coal bed gas resources in coal seam, in Methane Transport in Coal Seam process
In, permeability is one of gas porous flow complexity important parameter in reflection coal seam, meanwhile, permeability is also gas porous flow mechanics
With a crucial research direction of engineering.Therefore, the measuring method of coal-bed gas permeability is studied to gas porous flow Mechanics Development
It is most important, while a series of mine safety problems demands such as coal and gas prominent are solved.Under complicated reservoir conditions, coal
The gas adsorbed in rock has different humidity.With the increase of seam mining depth, the air humidity brought into therewith is also increased.And
Gas is that one kind contains CH4And CO2Etc. various mixed gases composition gas, the difference of mixed gas humidity will lead in coal seam
There is very big difference in gas permeation rate；And through electric field method known to research be improve coal rock layer permeability provide it is a kind of newly
Approach, this for rationally and efficiently using electromagnetic field, extraction efficient for China's low air permeability coal seam gas, mine safety production,
Environment protection all has great theory and realistic meaning.
Therefore, it studies influence of the humidity of mixed gas to coal permeability to be of great significance, there are no outer so far
It is powered on the three axis seepage apparatus for changing mixed gas humidity under field action, it is therefore necessary to carry out to existing three axis seepage apparatus
Certain improvement is to solve coal mining scene mixed gas humidity and electric field to technical problems such as the effects of Permeability Oe Coal And Porous Rock And Fractured Rock.
Summary of the invention
The technical problem to be solved by the present invention is providing a kind of three axis seepage apparatus for changing mixed gas electric field and humidity
And operating method, coal is simulated to solve three axis seepage apparatus of the not changeable mixed gas humidity of the prior art and extra electric field
Mine exploits live mixed gas humidity and electric field to technical problems such as the effects of Permeability Oe Coal And Porous Rock And Fractured Rock.
Technical solution of the present invention:
A kind of three axis seepage apparatus changing mixed gas electric field and humidity, it includes mixed gas feed system and gas mixing
System, mixed gas feed system and gas mixing system pass through piping connection；Gas mixing system and triaxial pressure system are logical
Cross piping connection；Triaxial pressure system and vacuum degassing system pass through piping connection；Vacuum degassing system and flow measuring systems
Pass through piping connection；The outside of the triaxial cell of the triaxial pressure system is equipped with electric field generator；Gas mixing system
Including gas mixing chamber, steam generator and gas mixing chamber pass through piping connection.
Steam generator includes humidity tester；It is intracavitary that humidity tester is mounted on gas mixing, humidity tester
It is connect by conducting wire with display；Display is fixed on gas mixing chamber upper surface.
The mixed gas feed system includes the first air accumulator and the second air accumulator；First air accumulator and gas mixing system
The first pressure reducing valve, first pressure gauge and first switch valve are sequentially installed on the pipeline of system connection；Second air accumulator and gas are mixed
The second pressure reducing valve, second pressure gauge and second switch valve are sequentially installed on the pipeline of collaboration system connection.
Triaxial pressure system includes triaxial cell, and the mistress in triaxial cell passes through axis pressure pipe and confining pressure pipe connecting shaft
Press pump and confining pressure pump；Third pressure gauge and third are sequentially installed on gas mixing system and the connecting line of triaxial pressure system
Pressure reducing valve.
Vacuum degassing system includes vacuum pump, and vacuum pump and the outlet end of triaxial pressure system pass through piping connection；In pipe
Road is sequentially installed with pressure gauge, the 4th pressure reducing valve and flanged valve.
Flow measuring systems include flowmeter, are equipped with check-valves on the connecting line of flowmeter and vacuum degassing system.
The operating method of a kind of described change mixed gas electric field and three axis seepage apparatus of humidity, it includes:
Step 1, the confining pressure that standard-sized coal body test specimen is mounted on triaxial cell as required are intracavitary, open vacuum pump later
Flanged valve is closed after coal sample and experimental provision are de-gassed six hours；
Step 2 is pumped to the set axis pressure of experiment with confining pressure value by adjustment axis press pump and confining pressure to simulate coal in ground end institute
By stress state；
Step 3 opens the first pressure reducing valve, first switch valve, the second pressure reducing valve, second switch valve, when two different gases exist
Mixing in mixing arrangement measures the gas humidity in gas mixer by humidometer；
Mixed gas is passed through gas mixing chamber by step 4, and the increase of humidity is carried out by steam generator, is adjusted
The humidity of the intracavitary mixed gas of gas mixing；
By adjusting third pressure reducing valve and according to third pressure gauge when step 5, the mixed gas humidity value needed for reaching experiment
Reading, which makes gas reach authorized pressure, makes experiment coal sample adsorb twenty four hours under mixed gas effect；
Step 6 carries out triaxial compression test under conditions of extra electric field, adjusts third pressure reducing valve to test desirable value to simulate
The variation of coal pore pressure in coal petrography recovery process records flow value after meter readings are stablized, calculates finally by formula
Coal permeability value under different humidity, axis pressure, confining pressure coupling under mixed gas acts under conditions of extra electric field out.
The invention has the advantages that:
The present invention, by the gas mixing of two gas tanks, can uniformly be mixed gas in gas mixing chamber by gas mixing system
It closes, and changes the humidity of mixed gas by steam generator, gaseous mixture can be monitored in real time in the humidometer of connection
The situation of change of body humidity passes through the 4th pressure reducing valve being successively arranged on the escape pipe that triaxial cell's end port is connected
Furthermore valve, precision pressure gauge connect vacuum pump so as to control the size of outlet pressure outside triaxial cell, it is ensured that
The intrusion for preventing foreign gas prevents foreign gas from causing error to experiment, and is equipped with electric field in the outside of triaxial cell
Generator is, it can be achieved that change the Permeability Oe Coal And Porous Rock And Fractured Rock of mixed gas humidity under DC Electric Field.The present invention can make raw coal outside
It is powered under field action and carries out Seepage Experiment under different mixed gas damp conditions, and be able to carry out not coaxially pressure and confining pressure
Seepage Experiment under the conditions of various factors coupling, can in real simulation process of coal mining mixed gas Seepage Experiment, the experiment
Device is simple to operation, and using effect is good, easy to spread；Solves the not changeable mixed gas humidity of the prior art and additional
The technical problems such as the variation of three axis seepage apparatus simulation coal mining scene mixed gas humidity of electric field.
Detailed description of the invention
Fig. 1 is the whole structural schematic diagram of the present invention；
Fig. 2 is the structural schematic diagram of mixed gas hygrometry device of the present invention；
In figure: the first air accumulator of 1-, the second air accumulator of 2-, 3- first pressure gauge, the first pressure reducing valve of 4-, the second pressure reducing valve of 5-, 6-
Second pressure gauge, 7- first switch valve, 8- second switch valve, 9- steam generator, 10- gas mixer, 11- third
Instrument, 15- axis press pump, 16- confining pressure pump, 17- essence occur for pressure gauge, 12- third pressure reducing valve, the triaxial cell 13-, 14- electric field
Close pressure gauge, the 4th pressure reducing valve of 18-, 19- flanged valve, 20- vacuum pump, 21- check-valves, 22- flowmeter, the first cylinder of 23-
Road, the second gas storage of 24- pipeline, 25- wetness display unit, 26- humidity tester, 27- outlet pipe, 28- mixed gas case.
Specific embodiment
A kind of three axis seepage apparatus changing mixed gas electric field and humidity, it includes mixed gas feed system and gas
Hybrid system, mixed gas feed system and gas mixing system pass through piping connection；Gas mixing system and triaxial pressure system
System passes through piping connection；Triaxial pressure system and vacuum degassing system pass through piping connection；Vacuum degassing system and flow measurement
System passes through piping connection；The outside of the triaxial cell 13 of the triaxial pressure system is equipped with electric field generator 14；Electric field
Generator 14 is mounted on the outer wall of triaxial cell 13；Gas mixing system includes gas mixing chamber 10, and vapor generates dress
The outlet side and gas mixing chamber 10 for setting 9 pass through piping connection；Steam generator 9 is used to be had by the permanent experimental facilities in Beijing
The production of limit company, model 1260Lnifntiy.Electric field generator 14 is produced using Yangzhou Suo Ya Electric Applicance Co., Ltd, model
The electric field generator of SY-0301A.
Steam generator 9 includes humidity tester 26；Humidity tester 26 is mounted in gas mixing chamber 10, humidity
Tester 26 is connect by conducting wire with display 25；Display 25 is fixed on 10 upper surface of gas mixing chamber.
, staff is facilitated to check.
The mixed gas feed system includes the first air accumulator 1 and the second air accumulator 2；First air accumulator 1 and gas are mixed
The first pressure reducing valve 4, first pressure gauge 3 and first switch valve 7 are sequentially installed on the pipeline of collaboration system connection；Second air accumulator 2
The second pressure reducing valve 5, second pressure gauge 6 and second switch valve 8 are sequentially installed on the pipeline connecting with gas mixing system.
Triaxial pressure system includes triaxial cell 13, and the mistress in triaxial cell 13 passes through axis pressure pipe and confining pressure Guan Lian
Spindle press pump 15 and confining pressure pump 16；Third pressure is sequentially installed on gas mixing system and the connecting line of triaxial pressure system
Table 11 and third pressure reducing valve 12.
Vacuum degassing system includes vacuum pump 20, and vacuum pump 20 and the outlet end of triaxial pressure system pass through piping connection；
Pressure gauge 17, the 4th pressure reducing valve 18 and flanged valve 19 are sequentially installed on pipeline.
Flow measuring systems include flowmeter 22, are equipped with non-return on flowmeter 22 and the connecting line of vacuum degassing system
Valve 21.
The operating method of a kind of described change mixed gas electric field and three axis seepage apparatus of humidity, it includes:
Step 1, the confining pressure that standard-sized coal body test specimen is mounted on triaxial cell 13 as required are intracavitary, open vacuum later
Pump 20 closes flanged valve 19 after being de-gassed coal sample and experimental provision six hours；
Step 2 simulates coal on ground with confining pressure value by adjustment axis press pump 15 and confining pressure pump 16 to the set axis pressure of experiment
Stress state suffered by bottom；
Step 3 opens the first pressure reducing valve 4, first switch valve 7, the second pressure reducing valve 5, second switch valve 8, when two different gas
Body mixes in mixing arrangement 10, measures the gas humidity in gas mixer 10 by humidometer 26；
Mixed gas is passed through gas mixing chamber 10 by step 4, and the increase of humidity is carried out by steam generator 9, is adjusted
The humidity of mixed gas in throttle body mixing chamber；
By adjusting third pressure reducing valve 12 and according to third pressure when step 5, the mixed gas humidity value needed for reaching experiment
Table 11 reading make gas reach authorized pressure make test coal sample mixed gas effect under adsorb twenty four hours；
Step 6 carries out triaxial compression test by electric field generator 14 under conditions of extra electric field, adjusts third pressure reducing valve 12
The variation that coal pore pressure in coal petrography recovery process is simulated to test desirable value, records flow after 22 stable reading of flowmeter
Value calculates under conditions of extra electric field different humidity under mixed gas effect finally by formula, axis pressure, confining pressure coupling are made
With lower coal permeability value.
Claims (7)
1. a kind of three axis seepage apparatus for changing mixed gas electric field and humidity, it includes that mixed gas feed system and gas are mixed
Collaboration system, mixed gas feed system and gas mixing system pass through piping connection；Gas mixing system and triaxial pressure system
Pass through piping connection；Triaxial pressure system and vacuum degassing system pass through piping connection；Vacuum degassing system and flow measurement system
System passes through piping connection；It is characterized by: the outside of the triaxial cell (13) of the triaxial pressure system is equipped with electric field hair
Raw instrument (14)；Gas mixing system includes gas mixing chamber (10), and steam generator (9) passes through with gas mixing chamber (10)
Piping connection.
2. a kind of three axis seepage apparatus for changing mixed gas electric field and humidity according to claim 1, it is characterised in that:
Steam generator (9) includes humidity tester (26)；Humidity tester (26) is mounted in gas mixing chamber (10), humidity
Tester (26) is connect by conducting wire with display (25)；Display (25) is fixed on gas mixing chamber (10) upper surface.
3. a kind of three axis seepage apparatus for changing mixed gas electric field and humidity according to claim 1, it is characterised in that:
The mixed gas feed system includes the first air accumulator (1) and the second air accumulator (2)；First air accumulator (1) and gas mixing
The first pressure reducing valve (4), first pressure gauge (3) and first switch valve (7) are sequentially installed on the pipeline of system connection；Second gas storage
The second pressure reducing valve (5) is sequentially installed on the pipeline that tank (2) is connect with gas mixing system, second pressure gauge (6) and second is opened
It closes valve (8).
4. a kind of three axis seepage apparatus for changing mixed gas electric field and humidity according to claim 1, it is characterised in that:
Triaxial pressure system includes triaxial cell (13), and the mistress in triaxial cell (13) passes through axis pressure pipe and confining pressure pipe connecting shaft
Press pump (15) and confining pressure pump (16)；Third pressure is sequentially installed on gas mixing system and the connecting line of triaxial pressure system
Table (11) and third pressure reducing valve (12).
5. a kind of three axis seepage apparatus for changing mixed gas electric field and humidity according to claim 1, it is characterised in that:
Vacuum degassing system includes vacuum pump (20), and vacuum pump (20) and the outlet end of triaxial pressure system pass through piping connection；In pipe
Road is sequentially installed with pressure gauge (17), the 4th pressure reducing valve (18) and flanged valve (19).
6. a kind of three axis seepage apparatus for changing mixed gas electric field and humidity according to claim 1, it is characterised in that:
Flow measuring systems include flowmeter (22), are equipped with check-valves on flowmeter (22) and the connecting line of vacuum degassing system
(21).
7. a kind of operating method of three axis seepage apparatus for changing mixed gas electric field and humidity as described in claim 1, it
Include:
Step 1, the confining pressure that standard-sized coal body test specimen is mounted on triaxial cell (13) as required are intracavitary, open later true
Sky pump (20) closes flanged valve (19) after being de-gassed coal sample and experimental provision six hours；
Step 2 simulates coal with confining pressure value by adjustment axis press pump (15) and confining pressure pump (16) to the set axis pressure of experiment
The stress state suffered by ground end；
Step 3 opens the first pressure reducing valve (4), first switch valve (7), the second pressure reducing valve (5), second switch valve (8), when two kinds
The mixing in mixing arrangement (10) of different gas, passes through the gas in humidometer (26) measurement gas mixer (10)
Humidity；
Mixed gas is passed through gas mixing chamber (10) by step 4, and the increasing of humidity is carried out by steam generator (9)
Add, the humidity of mixed gas in regulating gas mixing chamber；
By adjusting third pressure reducing valve (12) and according to third pressure when step 5, the mixed gas humidity value needed for reaching experiment
Power table (11) reading make gas reach authorized pressure make test coal sample mixed gas effect under adsorb twenty four hours；
Step 6 carries out triaxial compression test under conditions of extra electric field, adjust third pressure reducing valve (12) to test desirable value with
The variation for simulating coal pore pressure in coal petrography recovery process, records flow value after flowmeter (22) stable reading, finally by
Formula calculates the coal infiltration under different humidity, axis pressure, confining pressure coupling under mixed gas effect under conditions of extra electric field
Rate value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910600075.6A CN110160939A (en) | 2019-07-04 | 2019-07-04 | A kind of three axis seepage apparatus and operating method changing mixed gas electric field and humidity |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910600075.6A CN110160939A (en) | 2019-07-04 | 2019-07-04 | A kind of three axis seepage apparatus and operating method changing mixed gas electric field and humidity |
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| CN110160939A true CN110160939A (en) | 2019-08-23 |
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| CN201910600075.6A Pending CN110160939A (en) | 2019-07-04 | 2019-07-04 | A kind of three axis seepage apparatus and operating method changing mixed gas electric field and humidity |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107884328A (en) * | 2017-12-01 | 2018-04-06 | 贵州大学 | A kind of three axle seepage apparatus for measuring mixed gas content change |
| CN107884309A (en) * | 2017-12-01 | 2018-04-06 | 贵州大学 | A kind of three axle seepage apparatus of mixed gas condition lower outlet end malleation |
| CN107907466A (en) * | 2017-12-01 | 2018-04-13 | 贵州大学 | It is a kind of to change gas humidity and three axis seepage apparatus of port of export positive pressure |
| CN208076323U (en) * | 2018-04-27 | 2018-11-09 | 河南理工大学 | It is a kind of to sentence the system for knowing gas adsorption desorption advantage field strength |
| CN109870399A (en) * | 2019-04-02 | 2019-06-11 | 贵州大学 | A kind of three axis seepage apparatus and operating method of changeable mixed gas pH value |
| CN210180884U (en) * | 2019-07-04 | 2020-03-24 | 贵州大学 | Triaxial seepage device for changing electric field and humidity of mixed gas |
-
2019
- 2019-07-04 CN CN201910600075.6A patent/CN110160939A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107884328A (en) * | 2017-12-01 | 2018-04-06 | 贵州大学 | A kind of three axle seepage apparatus for measuring mixed gas content change |
| CN107884309A (en) * | 2017-12-01 | 2018-04-06 | 贵州大学 | A kind of three axle seepage apparatus of mixed gas condition lower outlet end malleation |
| CN107907466A (en) * | 2017-12-01 | 2018-04-13 | 贵州大学 | It is a kind of to change gas humidity and three axis seepage apparatus of port of export positive pressure |
| CN208076323U (en) * | 2018-04-27 | 2018-11-09 | 河南理工大学 | It is a kind of to sentence the system for knowing gas adsorption desorption advantage field strength |
| CN109870399A (en) * | 2019-04-02 | 2019-06-11 | 贵州大学 | A kind of three axis seepage apparatus and operating method of changeable mixed gas pH value |
| CN210180884U (en) * | 2019-07-04 | 2020-03-24 | 贵州大学 | Triaxial seepage device for changing electric field and humidity of mixed gas |
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Application publication date: 20190823 |