CN205538584U - Testing arrangement of steam driven coal body methane desorption seepage flow - Google Patents
Testing arrangement of steam driven coal body methane desorption seepage flow Download PDFInfo
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- CN205538584U CN205538584U CN201620243147.8U CN201620243147U CN205538584U CN 205538584 U CN205538584 U CN 205538584U CN 201620243147 U CN201620243147 U CN 201620243147U CN 205538584 U CN205538584 U CN 205538584U
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Abstract
The utility model provides a testing arrangement of steam driven coal body methane desorption seepage flow, includes vacuum pumping system, gas injection system, desorption seepage flow system and gaseous measurement system, vacuum pumping system includes vacuum pump and vacuum vessel, and the air inlet of vacuum pump is connected with the gas outlet of vacuum vessel through first trachea, is equipped with vacuum meter and first stop valve in proper order along gas flow direction on the first trachea, the gas injection system includes the methane gas pitcher, and the methane gas pitcher passes through second trachea and desorption seepage flow headtotail, is equipped with high pressure gauge, first relief pressure valve, low pressure table, first pipeline booster pump, second stop valve, check valve, steam generation mechanism, air -vent valve, third stop valve and first manometer in proper order along gas flow direction on the second trachea, the utility model discloses be convenient for the operation, work load is little, it is quick accurate to measure, the experimental performance is high, provides experiment and theoretical research for the permeability and the infiltration capacity of coal bed gas.
Description
Technical field
This utility model belongs to coal mine gas drainage technical field, is specifically related to the test device of a kind of steam drive coal gas Desorption And Seepage.
Background technology
Coal mine gas is a kind of imflammable gas, it is the resource of a kind of preciousness, also it is the maximum hidden danger threatening Safety of Coal Mine Production, in mining process, gas is gushed out to the tunnel of mine from coal seam internal diffusion, when the gas density in tunnel reaches explosion limit, when running into naked light, will result in Gas Explosion Accidents in Coal Mines.Carry out the gas pre-drainage of this coal seam, down-hole or adjacent coal seam adopting is to reduce mine gas emission rate, the effective ways of preventing and treating coal mine gas disaster.Currently known coal bed gas extraction method mainly has the extraction of this coal bed drilling, adjacent coal seam layer-through drilling extraction, the adjacent coal seam tunnel boring method such as associating extraction and surface vertical borehole extraction, the common principle of these methods is construct in the coal seam boring with ft connection or tunnel, boring or the high gas of tunnel ambient pressure can low-pressure area flowings to boring or tunnel, but owing to most coalfields of China broadly fall into low permeability coal seam, the speed of Gas Flow is slow, and conventional gas drainage method is poor for low permeability coal seam effect.
nullChina has abundant coal bed gas resource，Wherein most coal seams are low permeability coal seam，Coal-bed gas exploitation amount is little，Cost of winning is high、Time is long，Large-scale industrialization exploitation cannot be formed，Therefore，Many scholars have carried out substantial amounts of experimental and theoretical study to the permeability and infiltration capacity that how to improve coal bed gas for many years，Focus primarily upon crustal stress to coal and rock Permeability and the method for Enhanced Coalbed Methane Recovery by Injecting Gas，Theory also discloses，Temperature is to improve a key factor of coal bed gas breathability，Steam injects and improves coal seam temperature in coal seam，Promote coal bed gas desorbing，Steam is the flowing of osmotic drive coal bed gas in coal seam，Coal-bed gas exploitation efficiency can be improved，But for coal bed gas condition、Coal bed methane condition，Need to use different steam injection parameter such as vapor (steam) temperatures、Steam quality、Steam flow、Gas injection boring layout etc.，For case above，Need badly and steam drive coal gas Desorption And Seepage is tested.
Utility model content
This utility model is in order to solve weak point of the prior art, there is provided a kind of convenient to operate, workload is little, measure quick and precisely, experimental performance is high, it is possible to measure under the conditions of varying environment the test device of a kind of steam drive coal gas Desorption And Seepage of the adsorption and permeation of gas in coal body rapidly and accurately.
For solving above-mentioned technical problem, this utility model adopts the following technical scheme that the test device of a kind of steam drive coal gas Desorption And Seepage, including pumped vacuum systems, gas injection system, Desorption And Seepage system and gas metering system；
Pumped vacuum systems includes vacuum pump and Dewar vessel, and the air inlet of vacuum pump is connected with the gas outlet of Dewar vessel by the first trachea, and the first trachea is sequentially provided with vacuum meter and the first stop valve along gas flow direction；
Gas injection system includes methane gas tank, methane gas tank is connected with Desorption And Seepage system by the second trachea, and the second trachea is sequentially provided with high pressure gauge, the first air relief valve, low-pressure meter, the first blower pump for pipeline, the second stop valve, check valve, steam generation mechanism, pressure regulator valve, the 3rd stop valve and the first Pressure gauge along gas flow direction；The air inlet of Dewar vessel is connected by the 3rd trachea and the second trachea, and the junction of the 3rd trachea and the second trachea is between pressure regulator valve and the 3rd stop valve, and the 3rd trachea is provided with the 4th stop valve；
Desorption And Seepage system includes sealed thermostat case, three axle clamp holder and compensators；Compensator and three axle clamp holder are positioned at sealed thermostat case, and methane gas tank is connected by the second trachea and three axle clamp holder；Compensator is provided with the 4th Pressure gauge, the air inlet of compensator is connected by the 5th trachea and the second trachea, the junction of the 5th trachea and the second trachea is between pressure regulator valve and the 3rd stop valve, the gas outlet of compensator is connected by the 6th trachea and the second trachea, the junction of the 6th trachea and the second trachea is between the first Pressure gauge and three axle clamp holder, 5th trachea is provided with the 5th stop valve, and the 6th trachea is provided with the 6th stop valve；The import of sealed thermostat case is provided with the first temperature sensor, and the outlet of sealed thermostat case is provided with the second temperature sensor；Three axle clamp holder are connected by the 7th trachea axial compression pump, and three axle clamp holder are connected by the 8th trachea confined pressure pump, and the 7th trachea is provided with the 7th stop valve, and the 8th trachea is provided with the 8th stop valve；
Gas metering system includes data acquisition control computer, electronic balance, gas-liquid separator and gas flowmeter, gas-liquid separator is connected by the outlet of the 9th trachea and three axle clamp holder, and the 9th trachea is sequentially provided with the 3rd Pressure gauge, the second air relief valve, the 9th stop valve and refrigerator along gas flow direction；Gas-liquid separator is connected with gas flowmeter by the tenth trachea, and the tenth trachea is provided with exsiccator；Data acquisition control computer is connected by data wire and the first Pressure gauge, the first temperature sensor, the second temperature sensor, the 4th Pressure gauge, the 3rd Pressure gauge, gas flowmeter and electronic balance respectively.
Steam generation mechanism includes water tank and steam generator, and water tank is connected with steam generator by the first water pipe, and steam generator is connected by the 4th trachea and the second trachea；It is sequentially provided with self priming pump, the tenth stop valve, high pressure water tank and the 11st stop valve along water flow direction on first water pipe, it is sequentially provided with the second Pressure gauge, the 12nd stop valve, second pipe booster pump and the 13rd stop valve along steam flow direction on 4th trachea, at the gas outlet of steam generator, is provided with thermometer.
Use technique scheme, this utility model has the advantages that this utility model primary operational is the linking between pumped vacuum systems, gas injection system, Desorption And Seepage system, gas metering system and cooperation, and pumped vacuum systems is that the air in pipeline and each equipment is discharged；Desorption And Seepage system mainly places compensator and three axle clamp holder, and in keeping sealed thermostat case, device keeps a certain steady temperature, after punching methane gas, coal sample is applied axial compressive force and circumferential pressure；The methane gas injecting certain pressure that gas injection system is artificial is stored in compensator, it is then passed through compensator in three axle clamp holder, injects the methane gas of specified pressure, after allowing coal sample fully absorb, start to inject high temperature and high pressure steam, utilize the methane gas generation desorbing of absorption in steam drive coal body and flow to the side that pressure is little；Metering system be from Desorption And Seepage system effluent air after supercooling, vapour liquid separator separates, the methane of gas outlet is through dried, it is expelled directly out through effusion meter, data line transfer additionally can be utilized to data acquisition control computer, record steam inlet and the pressure gauge reading of outlet, temperature sensor registration, the Pressure gauge registration of compensator, the registration of high Accuracy Electronic Balance, the registration of gas flowmeter, and then calculating the permeability of the permeability of desorbing gas, steam in coal body, steam is heat conductivity in coal body；High-temperature steam drives gas porous flow technology in coal body to be the methane desorbing utilizing high temperature and high pressure steam to promote in coal, a kind of new experiment method of test coal-bed gas breathability；The percolation law of coal body under the influence of Study on Test Method stress and temperature, it is possible to provide theoretical reference for the design of gas drainage under suction and the exploitation of optimization and coal bed gas.
In sum, this utility model is convenient to operate, workload is little, measure quick and precisely, experimental performance is high, and permeability and infiltration capacity for coal bed gas provide experiment and theoretical research.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Detailed description of the invention
As it is shown in figure 1, the test device of a kind of steam drive coal gas Desorption And Seepage of the present utility model, including pumped vacuum systems I, gas injection system II, Desorption And Seepage system III and gas metering system IV；
Pumped vacuum systems I includes vacuum pump 1 and Dewar vessel 2, and the air inlet of vacuum pump 1 is connected with the gas outlet of Dewar vessel 2 by the first trachea 13, and the first trachea 13 is sequentially provided with vacuum meter 3 and the first stop valve 14 along gas flow direction；
Gas injection system II includes methane gas tank 4, methane gas tank 4 is connected with Desorption And Seepage system by the second trachea 15, and the second trachea 15 is sequentially provided with high pressure gauge the 5, first air relief valve 6, low-pressure meter the 7, first blower pump for pipeline the 8, second stop valve 58, check valve 9, steam generation mechanism, pressure regulator valve the 10, the 3rd stop valve 11 and the first Pressure gauge 12 along gas flow direction；The air inlet of Dewar vessel 2 is connected with the second trachea 15 by the 3rd trachea 16, and the junction of the 3rd trachea 16 and the second trachea 15 is between pressure regulator valve 10 and the 3rd stop valve 11, and the 3rd trachea 16 is provided with the 4th stop valve 17；
Steam generation mechanism includes that water tank 18 and steam generator 19, water tank 18 are connected with steam generator 19 by the first water pipe 20, and steam generator 19 is connected with the second trachea 15 by the 4th trachea 21；It is sequentially provided with self priming pump the 22, the tenth stop valve 23, high pressure water tank the 24 and the 11st stop valve 25 along water flow direction on first water pipe 20, it is sequentially provided with the second Pressure gauge the 26, the 12nd stop valve 27, second pipe booster pump the 28 and the 13rd stop valve 29 along steam flow direction on 4th trachea 21, at the gas outlet of steam generator 19, is provided with thermometer 30；
Desorption And Seepage system III includes sealed thermostat case 31, three axle clamp holder 32 and compensator 33；Compensator 33 and three axle clamp holder 32 are positioned at sealed thermostat case 31, and methane gas tank 4 is connected with three axle clamp holder 32 by the second trachea 15；Compensator 33 is provided with the 4th Pressure gauge 34, the air inlet of compensator 33 is connected with the second trachea 15 by the 5th trachea 35, the junction of the 5th trachea 35 and the second trachea 15 is between pressure regulator valve 10 and the 3rd stop valve 11, the gas outlet of compensator 33 is connected with the second trachea 15 by the 6th trachea 36, the junction of the 6th trachea 36 and the second trachea 15 is between the first Pressure gauge 12 and three axle clamp holder 32,5th trachea 35 is provided with the 5th stop valve 37, and the 6th trachea 36 is provided with the 6th stop valve 38；The import of sealed thermostat case 31 is provided with the first temperature sensor 39, and the outlet of sealed thermostat case 31 is provided with the second temperature sensor 40；Three axle clamp holder 32 are connected by the 7th trachea 41 axial compression pump 42, and three axle clamp holder 32 are connected by the 8th trachea 43 confined pressure pump 44, and the 7th trachea 41 is provided with the 7th stop valve 45, and the 8th trachea 43 is provided with the 8th stop valve 46；
Gas metering system IV includes data acquisition control computer 47, electronic balance 48, gas-liquid separator 49 and gas flowmeter 50, gas-liquid separator 49 is connected with the outlet of three axle clamp holder 32 by the 9th trachea 51, and the 9th trachea 51 is sequentially provided with the 3rd Pressure gauge the 52, second air relief valve the 53, the 9th stop valve 54 and refrigerator 55 along gas flow direction；Gas-liquid separator 49 the tenth trachea 56 is connected with gas flowmeter 50, and the tenth trachea 56 is provided with exsiccator 57；Data acquisition control computer 47 is connected by data wire and first Pressure gauge the 12, first temperature sensor the 39, second temperature sensor the 40, the 4th Pressure gauge the 34, the 3rd Pressure gauge 52, gas flowmeter 50 and electronic balance 48 respectively.
The method of testing of a kind of steam drive coal gas Desorption And Seepage, comprises the following steps:
(1) coal sample is prepared: gathering the coal sample of different permeability, be processed into Ф 50 × 100mm certified reference coal as requested, 50mm is the diameter of coal sample, and 100mm is the length of coal sample；
(2) checking experiment condition: check each experimental facilities, test whether it stands intact, and check that all pipelines are the most unimpeded, whether the gas content of methane gas tank 4 can reach the experimental pressure of design anticipation, the sealing effectiveness of three axle clamp holder 32 is the most intact, the registration of each experiment instrument is the most normal, the circuit of electrical equipment whether path；
(3) assemble coal sample and prepare vacuum experiment condition: coal sample being put thermal contraction rubber sleeve, is subsequently secured in three axle clamp holder 32；Open the 3rd stop valve the 11, the 4th stop valve 17 and the first stop valve 14, other valves are closed, open vacuum pump 1 and sealed thermostat case 31, the temperature in sealed thermostat case 31 is made to be maintained at 100 ~ 105 ° of C, by vacuum pump 1 evacuation internal to three axle clamp holder 32, when the registration of vacuum meter 3 is 0.1Mpa, close the 3rd stop valve the 11, the 4th stop valve 17 and the first stop valve 14；
(4) in compensator 33, methane gas is injected: open first air relief valve the 6, second stop valve 58, check valve 9, pressure regulator valve 10 and the 5th stop valve 37, open methane gas tank 4 simultaneously, methane gas enters compensator 33 under the driving of the first blower pump for pipeline 8 and along the second trachea 15, when the force value on the 4th Pressure gauge 34 on compensator 33 reaches setting value, close methane gas tank 4, simultaneously close off first air relief valve the 6, second stop valve 58, check valve 9, pressure regulator valve 10 and the 5th stop valve 37；
(5) in three axle clamp holder 32, methane gas is injected: open the 6th stop valve 38, methane gas in compensator 33 is along the 6th trachea 36 and in the second trachea 15 enters three axle clamp holder 32,24h is filled with methane gas in three axle clamp holder 32 continuously, make coal sample that the absorption of methane gas to reach balance, when the registration of the 4th Pressure gauge 34 no longer changes, close the 6th stop valve 38；
(6) coal sample force simulation: open the 7th stop valve 45 and the 8th stop valve 46, then start axial compression pump 42 and confined pressure pump 44, coal sample is applied axial compressive force and circumferential pressure；
(7) data acquisition control computer 47 is opened；
(8) continue in three axle clamp holder 32, be passed through high temperature and high pressure steam: open the tenth stop valve 23, it is then turned on self priming pump 22 toward water filling in high pressure water tank 24, after filling water in high pressure water tank 24, close the tenth stop valve 23 and high pressure water tank 24, then open the 11st stop valve 25 and start steam generator 19, after thermometer registration at the gas outlet of steam generator 19 reaches setting value, open the 12nd stop valve 27 successively, 13rd stop valve 29 and the 3rd stop valve 11, open second pipe booster pump 28 simultaneously, in three axle clamp holder 32, high temperature and high pressure steam is persistently injected under the driving of second pipe booster pump 28, regulation pressure regulator valve 10 regulates the registration of the first Pressure gauge 12, making the first Pressure gauge 12 registration is a；
(9) gas-liquid separation: open refrigerator 55, then the second air relief valve 53 and the 9th stop valve 54 is opened, gas liquid mixture in three axle clamp holder 32 enters gas-liquid separator 49 through the 3rd Pressure gauge 52 and refrigerator 55, cooled liquid flows out at the liquid outlet of gas-liquid separator 49, the methane gas being desorbed is discharged through exsiccator 57, gas flowmeter 50, simultaneously record registration b of the 3rd Pressure gauge 52, the registration of electronic balance 48 and registration d of gas flowmeter 50；
(10) first Pressure gauge the 12, first temperature sensor the 39, second temperature sensor the 40, the 4th Pressure gauge the 34, the 3rd Pressure gauge 52, gas flowmeter 50 and the above-mentioned numerical value shown in electronic balance 48 are acquired by data acquisition control computer 47, according to coal gas permeability formula, calculate coal sample for gas test permeability k=(2dP μ * l)/π (a-b) r, P is room atmosphere pressure, μ is methane gas viscosity, r is length 0.1m that radius 0.025m, l are coal sample of coal sample.
Shape of the present utility model, material, structure etc. are not made any pro forma restriction by the present embodiment; every any simple modification, equivalent variations and modification made above example according to technical spirit of the present utility model, belongs to the protection domain of technical solutions of the utility model.
Claims (2)
1. the test device of a steam drive coal gas Desorption And Seepage, it is characterised in that: include pumped vacuum systems, gas injection system, Desorption And Seepage system and gas metering system；
Pumped vacuum systems includes vacuum pump and Dewar vessel, and the air inlet of vacuum pump is connected with the gas outlet of Dewar vessel by the first trachea, and the first trachea is sequentially provided with vacuum meter and the first stop valve along gas flow direction；
Gas injection system includes methane gas tank, methane gas tank is connected with Desorption And Seepage system by the second trachea, and the second trachea is sequentially provided with high pressure gauge, the first air relief valve, low-pressure meter, the first blower pump for pipeline, the second stop valve, check valve, steam generation mechanism, pressure regulator valve, the 3rd stop valve and the first Pressure gauge along gas flow direction；The air inlet of Dewar vessel is connected by the 3rd trachea and the second trachea, and the junction of the 3rd trachea and the second trachea is between pressure regulator valve and the 3rd stop valve, and the 3rd trachea is provided with the 4th stop valve；
Desorption And Seepage system includes sealed thermostat case, three axle clamp holder and compensators；Compensator and three axle clamp holder are positioned at sealed thermostat case, and methane gas tank is connected by the second trachea and three axle clamp holder；Compensator is provided with the 4th Pressure gauge, the air inlet of compensator is connected by the 5th trachea and the second trachea, the junction of the 5th trachea and the second trachea is between pressure regulator valve and the 3rd stop valve, the gas outlet of compensator is connected by the 6th trachea and the second trachea, the junction of the 6th trachea and the second trachea is between the first Pressure gauge and three axle clamp holder, 5th trachea is provided with the 5th stop valve, and the 6th trachea is provided with the 6th stop valve；The import of sealed thermostat case is provided with the first temperature sensor, and the outlet of sealed thermostat case is provided with the second temperature sensor；Three axle clamp holder are connected by the 7th trachea axial compression pump, and three axle clamp holder are connected by the 8th trachea confined pressure pump, and the 7th trachea is provided with the 7th stop valve, and the 8th trachea is provided with the 8th stop valve；
Gas metering system includes data acquisition control computer, electronic balance, gas-liquid separator and gas flowmeter, gas-liquid separator is connected by the outlet of the 9th trachea and three axle clamp holder, and the 9th trachea is sequentially provided with the 3rd Pressure gauge, the second air relief valve, the 9th stop valve and refrigerator along gas flow direction；Gas-liquid separator is connected with gas flowmeter by the tenth trachea, and the tenth trachea is provided with exsiccator；Data acquisition control computer is connected by data wire and the first Pressure gauge, the first temperature sensor, the second temperature sensor, the 4th Pressure gauge, the 3rd Pressure gauge, gas flowmeter and electronic balance respectively.
The test device of a kind of steam drive coal gas Desorption And Seepage the most according to claim 1, it is characterized in that: steam generation mechanism includes water tank and steam generator, water tank is connected with steam generator by the first water pipe, and steam generator is connected by the 4th trachea and the second trachea；It is sequentially provided with self priming pump, the tenth stop valve, high pressure water tank and the 11st stop valve along water flow direction on first water pipe, it is sequentially provided with the second Pressure gauge, the 12nd stop valve, second pipe booster pump and the 13rd stop valve along steam flow direction on 4th trachea, at the gas outlet of steam generator, is provided with thermometer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620243147.8U CN205538584U (en) | 2016-03-28 | 2016-03-28 | Testing arrangement of steam driven coal body methane desorption seepage flow |
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| CN201620243147.8U CN205538584U (en) | 2016-03-28 | 2016-03-28 | Testing arrangement of steam driven coal body methane desorption seepage flow |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105699273A (en) * | 2016-03-28 | 2016-06-22 | 河南理工大学 | Testing device and method of desorption and seepage of steam driven coal mass methane |
| CN106932328A (en) * | 2017-05-16 | 2017-07-07 | 四川大学 | The system and method for coal body permeability is tested using search gas |
| CN107219148A (en) * | 2017-05-19 | 2017-09-29 | 河南理工大学 | A kind of experimental method for being applied to coal body adsorption-desorption deformation test under HTHP |
| 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 |
| CN113281234A (en) * | 2021-05-14 | 2021-08-20 | 河南工程学院 | Coal dust gas diffusion seepage flow measuring device |
| CN113945481A (en) * | 2021-09-29 | 2022-01-18 | 合肥综合性国家科学中心能源研究院(安徽省能源实验室) | Injecting CO into low-permeability coal seam2Simulation test system for continuous process of displacing coal bed gas |
-
2016
- 2016-03-28 CN CN201620243147.8U patent/CN205538584U/en not_active Withdrawn - After Issue
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105699273A (en) * | 2016-03-28 | 2016-06-22 | 河南理工大学 | Testing device and method of desorption and seepage of steam driven coal mass methane |
| CN105699273B (en) * | 2016-03-28 | 2018-05-15 | 河南理工大学 | A kind of test device and method of steam drive coal gas Desorption And Seepage |
| CN106932328A (en) * | 2017-05-16 | 2017-07-07 | 四川大学 | The system and method for coal body permeability is tested using search gas |
| CN107219148A (en) * | 2017-05-19 | 2017-09-29 | 河南理工大学 | A kind of experimental method for being applied to coal body adsorption-desorption deformation test under HTHP |
| CN107219148B (en) * | 2017-05-19 | 2023-02-24 | 河南理工大学 | Experimental method suitable for coal body adsorption and desorption deformation test under high temperature and high pressure |
| 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 |
| CN113281234A (en) * | 2021-05-14 | 2021-08-20 | 河南工程学院 | Coal dust gas diffusion seepage flow measuring device |
| CN113281234B (en) * | 2021-05-14 | 2023-09-01 | 河南工程学院 | Coal dust gas diffusion seepage flow measuring device |
| CN113945481A (en) * | 2021-09-29 | 2022-01-18 | 合肥综合性国家科学中心能源研究院(安徽省能源实验室) | Injecting CO into low-permeability coal seam2Simulation test system for continuous process of displacing coal bed gas |
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