CN102680373A - Double-purpose vapor and electric-heating three-shaft desorption and permeation test device - Google Patents
Double-purpose vapor and electric-heating three-shaft desorption and permeation test device Download PDFInfo
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- CN102680373A CN102680373A CN2012101611408A CN201210161140A CN102680373A CN 102680373 A CN102680373 A CN 102680373A CN 2012101611408 A CN2012101611408 A CN 2012101611408A CN 201210161140 A CN201210161140 A CN 201210161140A CN 102680373 A CN102680373 A CN 102680373A
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Abstract
The invention belongs to gas content experiment equipment in a coal bed of a coal mine, and particularly relates to a double-purpose vapor and electric-heating three-shaft desorption and permeation test device. An upper pressing cap (7) is connected with the upper end of a sleeve (26) of a three-shaft pressure chamber (6) by threads; a lower pressing cap (10) is connected with the lower end of the sleeve (26) by threads; a coal sample (28) is mounted in the middle of the sleeve (26); an upper pressing head (27) is mounted above the coal sample (28); a lower pressing head (25) is mounted below the coal sample (28); a baffle (8) is mounted on the connection part of the sleeve (26) on the upper pressing head (27) and the upper pressing cap (7); a piston (5) is mounted at a step of the upper pressing head (27); a thermocouple sensor (9) is mounted in a lower pressing cap hole (10-1); an electric heater (30) is arranged on the upper pressing head (27) and the coal sample (28); a vapor channel (21) is arranged in the upper pressing head (27), the lower pressing head (25) and the coal sample (28); and an upper pressing head hole (27-1) is connected with a methane gas bottle (15) through a pipeline (18) and a pressure adjusting valve (13), so that the gas absorption amount is reduced, and the gas desorption amount and the gas permeation amount in the coal bed can be increased.
Description
Technical field
The invention belongs to gas bearing capacity experimental facilities in the coal seam, colliery, the dual-purpose three desorb permeability experimental facilities of particularly a kind of steam and electrical heating.
Background technology
Coal-mine gas is a significant threat to Safety of Coal Mine Production, if but be used and be the high-quality clean energy resource, do the methane drainage and utilization project of coal-seam gas well, just can turn harm into good, turn waste into wealth.
China's complicated geological condition; Coalbed methane reservoir has the characteristic of low pressure, hypotonic, low saturated, high air content; Except that the coal-seam gas entering business development in the high infiltration of only a few coal seam reservoirs such as Qinshui basin heartful feelings portion and Fuxin, iron processes mining area area; Most coals producing region coal bed gas well fails to reach the requirement of commercial production air-flow; Wherein the most key problem is that China's coal seam reservoirs permeability is generally on the low side, and coal-seam gas output process is the complex process of an experience desorb-diffusion-seepage flow, and the well stimulation of on gas field, hyposmosis coal seam, carrying out test at present successively mainly contains waterfrac treatment, gas injecting mining and pinniform horizontal branch well technology etc.But all there is certain limitation at present in above-mentioned The Application of Technology, and for example, hydraulic fracturing technology is only applicable to hard relatively fracture-type reservoir coal-bed gas exploitation; The coal seam reservoirs soft to the coal seam, that the hole crack is complicated; Waterpower turns into very limited, and because the coal seam has very strong water absorptivity, coal seam suction back deliquescing; The proppant embedment coal seam is prone to cause pressure-break closed again after the pressure release; Gas injecting mining is through injecting CO in the coal seam
2Gas is through competitively absorption principle raising the output coal-seam gas effect is obvious, but CO
2Source of the gas and economy make its range of application very limited; The pinniform horizontal well only is the method through coal seam reservoirs boring, has reduced coal-seam gas and has got into the resistance of pit shaft, but fundamentally do not changed coal seam reservoirs hyposmosis character.For the release technology, the gas permeation that is in the free state between the coal seam is come out through the people, can improve the gas pumping amount to a certain extent; But the methane gas that exists with free state in the coal seam only occupies 10% ~ 20% of whole coal-bed gas gas flow; Usually the adsorption gas amount accounts for 80% ~ 90%; Utilize the gas amount of hydraulic fracturing technology extraction less; The gas of most of adsorbed state can be discharged into atmosphere along with the exploitation in coal seam, make gas resources can not obtain good use.
Summary of the invention
The objective of the invention is to overcome above-mentioned technical deficiency, provide a kind of and can accurately obtain gas bearing capacity permeability desorption quantity performance parameter in the coal petrography, the dual-purpose three desorb permeability experimental facilities of easy to operate steam and electrical heating.
The technical scheme that technical solution problem of the present invention adopts is: the dual-purpose three desorb permeability experimental facilities of steam and electrical heating comprise: steam generator, water tank, fuel tank, high-pressure oil pump, volumetric displacement meter one, two, temp controlled meter, pipeline, lead, electric heater, thermocouple sensor, the sleeve upper end that is characterized in the triaxial cell upper pressing cap that is threaded, and lower pressing cap is threaded in the sleeve lower end; In the sleeve middle coal sample is housed; Seaming chuck is equipped with in the top of coal sample, and push-down head is equipped with in the below of coal sample, and baffle plate is equipped with in sleeve on seaming chuck and upper pressing cap junction; The dress piston at the step place of seaming chuck; On the top end wall of upper pressing cap, be provided with the upper pressing cap hole, on the lower end wall of lower pressing cap, set the pressure cap hole, in the lower pressing cap hole, adorn thermocouple sensor; In upper and lower ram shaft to being equipped with upper and lower pressure head pore; In with seaming chuck in the electrically heated device and the concentricity hole of coal sample, adorn electric heater, electric heater is connected temp controlled meter with lead respectively with thermocouple sensor, the concentricity Kong Zhongshe steam channel of upper and lower pressure head in steam-heated device and coal sample; The steam channel top connects steam control valve with pipeline; The steam control valve other end connects steam generator, and the lower end of steam through hole connects condenser and gas-liquid separator, and condenser is connected the water tank top with gas-liquid separator; The push-down head pore connects volumetric displacement meter two and vacuum pump with the vacuum pump operation valve; The seaming chuck pore is connected the methane gas cylinder with pipeline with pressure regulator valve, six-way valve connects upper pressing cap hole, condenser, fuel tank, high-pressure oil pump and steam channel with pipeline, and the water tank below connects steam generator with water pump.
The invention has the beneficial effects as follows: the dual-purpose three desorb permeability experimental facilities of steam and electrical heating increase the gas molecular activity through temperature from heat increase coal containing methane gas layer to the coal seam that inject; The gas molecule that has adsorbed is easy to obtain kinetic energy; Produce the desorption phenomenon; The adsorption gas amount is reduced; Thereby gas desorption quantity and infiltration capacity in the increase coal seam, adopt three loadings and sealing gas, steam, oil the coal body airtight container, obtain coal body permeability and desorption quantity performance parameter under steam in jection or electro ultrafiltration, for the extraction of coal-bed gas reasonable resources and comprehensive utilization provide strong technical data.
Description of drawings
Specify with embodiment below in conjunction with accompanying drawing.
Fig. 1 is the Steam Heating structural drawing of the dual-purpose three desorb permeability experimental facilities of steam and electrical heating.
Fig. 2 is the electric heating device figure of the dual-purpose three desorb permeability experimental facilities of steam and electrical heating.
Among the figure, the 1-steam generator; The 2-fuel tank; The 3-six-way valve; The 4-steam control valve; The 5-piston; The 6-triaxial cell; The 7-upper pressing cap; 7-1-upper pressing cap hole; The 8-baffle plate; The 9-thermocouple sensor; The 10-lower pressing cap; 10-1-lower pressing cap hole; The 11-condenser; The 12-temp controlled meter; The 13-pressure regulator valve; 14-volumetric displacement meter one; 15-methane gas cylinder; The 16-gas-liquid separator; The 17-water tank; The 18-pipeline; The 19-vacuum pump; 20-vacuum pump operation valve; The 21-steam channel; The 22-water pump; The 22-1-valve; 23-volumetric displacement meter two; The 24-high-pressure oil pump; The 25-push-down head; 25-1-push-down head pore; The 26-sleeve; The 27-seaming chuck; 27-1-seaming chuck pore; The 28-coal sample; The 29-lead; The 30-electric heater.
Embodiment
Embodiment, with reference to accompanying drawing 1, in the steam heater of the dual-purpose three desorb permeability experimental facilities of steam and electrical heating with electric heater unit in device in a shared sleeve 26, upper and lower pressure cap 7,10 and the sleeve 26.Sleeve 26 upper ends that steam-heated whole device is triaxial cell 6 upper pressing cap 7 that is threaded, the lower pressing cap 10 that is threaded in the lower end of sleeve 26 is equipped with coal sample 28 in the middle of sleeve 26.The center pit that pressure head 25, upper and lower pressure head 27,25 stretch out upper and lower pressure cap 7,10 is respectively loaded in the below that pressure head 27, coal sample 28 are loaded onto in coal sample 28 tops.Central hole in upper and lower pressure cap 7,10 and coal sample 28 is established steam channel 21.At the junction dress baffle plate 8 of sleeve 26 with upper pressing cap 7; The dress piston 5 at the step place of seaming chuck 27 is provided with upper pressing cap hole 7-1 on the top end wall of upper pressing cap 7, set pressure cap hole 10-1 on the lower end wall of lower pressing cap 10; Dress thermocouple sensor 9 in the 10-1 of lower pressing cap hole; Thermocouple sensor 9 connects temp controlled meter 12, and the top of steam channel 21 connects steam control valve 4 with pipeline 18, and steam control valve 4 other ends connect steam generator 1 with pipeline 18.The below of steam channel 21 connects condenser 11 and gas-liquid separator 16, and gas-liquid separator 16 connects volumetric displacement meter 1.Upper pressing cap pore 7-1 in the triaxial cell 6 connects condenser 11 with pipeline 18, and condenser 11 is connected water tank 17 tops with gas-liquid separator 16.Above seaming chuck pore 27-1, be connected methane gas cylinder 15 with pressure regulator valve 13 with pipeline 18.The push-down head pore 25-1 of 6 belows, triaxial cell connects vacuum pump operation valve 20, and vacuum pump operation valve 20 connects volumetric displacement meter 2 23 and vacuum pump 19 respectively.Six-way valve 3 usefulness pipelines 18 connect lower pressing cap 10, upper pressing cap pore 7-1, fuel tank 2 and high-pressure oil pump 24.The below of water tank 17 connects water pump 22 with valve 22-1, and water pump 22 connects steam generator 1.With reference to accompanying drawing 2; Dress electric heater 30 in the seaming chuck 27 in three desorb permeability experimental facilities of electrical heating and the center pit of coal sample 28; Electric heater 30 tops connect temp controlled meter 12 with lead 29, and the thermocouple sensor 9 usefulness leads 29 on the lower pressing cap 10 connect temp controlled meter 12.
The experimental technique of the dual-purpose three desorb permeability experimental facilities of steam and electrical heating: 1, three desorb permeability experimental facilities of steam are valves of valve, six-way valve 3 and volumetric displacement meter one 14 fronts of pressure regulator valve 13, condenser 11 fronts of steam off by-pass valve control 4, methane gas cylinder 15 tops; Open vacuum pump 19 and take out the various residual gas in the coal sample 28 in the triaxial cell 6 with vacuum pump operation valve 20; Pumpdown time was generally 8 hours; Vacuum tightness reaches 100Pa, closes vacuum pump operation valve 20, opens six-way valve 3 and high-pressure oil pump 24; Coal sample 28 is pressurizeed, reach the specialized range pressure and stop pressurization.Open the pressure regulator valve 13 above the methane gas cylinder 15, let coal sample 28 fully adsorb, adsorption time is 12 hours; After finishing, absorption opens steam control valve 4; Let steam flow into and heat, let condenser 11, gas-liquid separator 16, volumetric displacement meter 1 carry out work simultaneously, and constantly observe temp controlled meter 12 and whether reach setting value along the steam channel in the coal sample 28 21; After reaching setting value; The valve of opening volumetric displacement meter one 14 fronts behind the steam off operation valve 4 carries out desorb to coal sample 28, and desorption time is 12 hours, and desorption quantity is carried out record; 2, three desorb permeability tests of electrical heating experimentation is to heat with 30 pairs of coal samples 28 of electric heater; Open temp controlled meter 12 simultaneously; Electric heater 30 cuts out automatically after temperature reaches requirement; The valve of opening volumetric displacement meter 2 23 fronts carries out desorb to coal sample 28, and other adsorption process is all identical with three experimental provisions of Steam Heating.
Claims (1)
1. steam and the dual-purpose three desorb permeability experimental facilities of electrical heating; Comprise steam generator (1), water tank (17), fuel tank (2), high-pressure oil pump (24), volumetric displacement meter one, two (14,23), temp controlled meter (12), pipeline (18), lead (29), electric heater (30), thermocouple sensor (9); Sleeve (26) upper end that it is characterized in that triaxial cell (6) upper pressing cap (7) that is threaded; Lower pressing cap (10) is threaded in sleeve (26) lower end; In sleeve (26) middle coal sample (28) is housed; Seaming chuck (27) is equipped with in the top of coal sample (28); Push-down head (25) is equipped with in the below of coal sample (28); Sleeve (26) on seaming chuck (27) is equipped with baffle plate (8) with upper pressing cap (7) junction, and the dress piston (5) at the step place of seaming chuck (27) is provided with upper pressing cap hole (7-1) on the top end wall of upper pressing cap (7); On the lower end wall of lower pressing cap (10), set pressure cap hole (10-1); Dress thermocouple sensor (9) axially is equipped with upper and lower pressure head pore (27-1,25-1) at upper and lower pressure head (27,25) in lower pressing cap hole (10-1), in seaming chuck in the electrically heated device (27) and the concentricity hole of coal sample (28), adorns electric heater (30); Electric heater (30) uses lead (29) to be connected temp controlled meter (12) respectively with thermocouple sensor (9); The concentricity Kong Zhongshe steam channel (21) of upper and lower pressure head in steam-heated device (27,25) and coal sample (28), steam channel (21) top connects steam control valve (4) with pipeline (18), and steam control valve (4) other end connects steam generator (1); The lower end of steam through hole (21) connects condenser (11) and gas-liquid separator (16); Condenser (11) is connected water tank (17) top with gas-liquid separator (16), push-down head pore (25-1) connects volumetric displacement meter two (23) and vacuum pump (19) with vacuum pump operation valve (20), and seaming chuck pore (27-1) is connected methane gas cylinder (15) with pipeline (18) with pressure regulator valve (13); Six-way valve (3) connects upper pressing cap hole (7-1), condenser (11), fuel tank (2), high-pressure oil pump (24) and steam channel (21) with pipeline (18), and water tank (17) below connects steam generator (1) with water pump (22).
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| CN102901803A (en) * | 2012-10-24 | 2013-01-30 | 河南理工大学 | Water-gas two-phase adsorption-desorption-seepage experimental system and method for loaded coal containing methane |
| CN102901801A (en) * | 2012-09-29 | 2013-01-30 | 山西煤炭运销集团科学技术研究有限公司 | Experimental method for raising gas desorption property |
| CN102928570A (en) * | 2012-10-24 | 2013-02-13 | 河南理工大学 | Sealing device for gas-containing coal sample used under triaxial compression experiment conditions |
| CN102954977A (en) * | 2012-11-13 | 2013-03-06 | 中国地质大学（北京） | Nuclear magnetic resonance instrument probe auxiliary device for carrying out steam saturation on porous media |
| CN102954978A (en) * | 2012-11-13 | 2013-03-06 | 中国地质大学（北京） | Nuclear magnetic resonance imaging observing device and method in coal rock crack development process |
| CN104535455A (en) * | 2015-01-07 | 2015-04-22 | 河南理工大学 | Gas seepage experiment device and method for dynamically monitoring pore pressure distribution and changes |
| CN104807681A (en) * | 2014-01-24 | 2015-07-29 | 重庆地质矿产研究院 | Automatic vacuum degassing instrument for coal bed gas or shale gas and corresponding vacuum degassing method |
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| CN102928570B (en) * | 2012-10-24 | 2014-08-13 | 河南理工大学 | Sealing device for gas-containing coal sample used under triaxial compression experiment conditions |
| CN102928570A (en) * | 2012-10-24 | 2013-02-13 | 河南理工大学 | Sealing device for gas-containing coal sample used under triaxial compression experiment conditions |
| CN102901803A (en) * | 2012-10-24 | 2013-01-30 | 河南理工大学 | Water-gas two-phase adsorption-desorption-seepage experimental system and method for loaded coal containing methane |
| CN102901803B (en) * | 2012-10-24 | 2014-10-08 | 河南理工大学 | Water-gas different adsorption-desorption-seepage experimental method for loaded coal containing methane |
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| CN104807681B (en) * | 2014-01-24 | 2019-07-16 | 重庆地质矿产研究院 | Automatic vacuum degassing instrument for coal bed gas or shale gas and corresponding vacuum degassing method |
| CN104807681A (en) * | 2014-01-24 | 2015-07-29 | 重庆地质矿产研究院 | Automatic vacuum degassing instrument for coal bed gas or shale gas and corresponding vacuum degassing method |
| CN104535455A (en) * | 2015-01-07 | 2015-04-22 | 河南理工大学 | Gas seepage experiment device and method for dynamically monitoring pore pressure distribution and changes |
| CN105241783A (en) * | 2015-11-05 | 2016-01-13 | 辽宁工程技术大学 | Coal-series shale gas absorption/desorption percolation experiment device |
| CN105784489B (en) * | 2016-02-29 | 2018-08-24 | 辽宁工程技术大学 | The lower coal deformation experimental rig of true triaxial stress seepage flow adsorption-desorption effect and method |
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| CN107687998B (en) * | 2017-08-30 | 2020-01-14 | 辽宁工程技术大学 | Experimental device and method for measuring permeability of coal rock mass through infrared center heating |
| CN109187926A (en) * | 2018-09-18 | 2019-01-11 | 太原理工大学 | Three axis seepage flow test device of fractured coal and rock and desorption-diffusion-seepage tests system |
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| CN110031601A (en) * | 2019-04-08 | 2019-07-19 | 太原理工大学 | A kind of coal gas adsorption-desorption performance testing device |
| CN110836834A (en) * | 2019-11-28 | 2020-02-25 | 辽宁工程技术大学 | Experimental device and method for promoting decomposition of coal bed gas by microwave directional radiation |
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