CN102680373B - 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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- CN102680373B CN102680373B CN2012101611408A CN201210161140A CN102680373B CN 102680373 B CN102680373 B CN 102680373B CN 2012101611408 A CN2012101611408 A CN 2012101611408A CN 201210161140 A CN201210161140 A CN 201210161140A CN 102680373 B CN102680373 B CN 102680373B
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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, particularly the dual-purpose three axle desorb permeability experimental facilities of a kind of steam and electrical heating.
Background technology
Coal-mine gas is 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 complex geologic conditions, coalbed methane reservoir has low pressure, hypotonic, low saturated, the feature of high air content, except Qinshui basin heartful feelings section and Fuxin, the regional coal-seam gas of the high infiltration of the only a few coal seam reservoirs such as Tiefa Mining area enters outside business development, most coal bases coal bed gas wells fail 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, the coal bed gas product process is the complex process of an experience desorb-diffusion-seepage flow, the well stimulation of carrying out successively at present test on the low permeability coal seam gas field mainly contains waterfrac treatment, gas injecting mining and pinniform horizontal branch well technology etc.But the application of above-mentioned technology all has some limitations at present, for example, hydraulic fracturing technology is only applicable to relatively hard fracture-type reservoir coal-bed gas exploitation, the coal seam reservoirs of, hole crack complexity soft to coal seam, waterpower turns into very limited, and because coal seam has very strong water absorptivity, deliquescing after the water suction of coal seam, the proppant embedment coal seam, easily cause pressure-break again closed after pressure release; Gas injecting mining by injecting CO in coal seam
2gas passes through competitively absorption principle volume increase coal-seam gas successful, but CO
2source of the gas and economy make its range of application very limited; The pinniform horizontal well is only the method for holing by coal seam reservoirs, has reduced coal-seam gas and has entered the resistance of pit shaft, but fundamentally do not changed coal seam reservoirs hyposmosis character.Be the release technology by the people, make the gas permeation of the free state between coal seam out, can improve to a certain extent the gas pumping amount; But the methane gas existed with free state in 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, gas resources can not well be utilized.
Summary of the invention
The object 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 coal petrography, the dual-purpose three axle 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 axle 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, wire, electric heater, thermocouple sensor, the sleeve upper end that the is characterized in triaxial cell upper pressing cap that is threaded, the lower pressing cap that is threaded in the sleeve lower end, in the middle of sleeve, coal sample is equipped with at place, seaming chuck is equipped with in the top of coal sample, push-down head is equipped with in the below of coal sample, and baffle plate is equipped with in the sleeve on seaming chuck and upper pressing cap junction, at the step place of seaming chuck dress piston, be provided with the upper pressing cap hole on the top end wall of upper pressing cap, set the pressure cap hole on the lower end wall of lower pressing cap, in the lower pressing cap hole, fill thermocouple sensor, upper, push-down head axially is equipped with, the push-down head pore fills electric heater in the seaming chuck with in electrically heated device and the concentricity hole of coal sample, and electric heater is connected temp controlled meter with wire respectively with thermocouple sensor, upper in steam-heated device, the concentricity Kong Zhongshe steam channel of push-down head and coal sample, the steam channel top connects steam control valve with pipeline, the steam control valve other end connects steam generator, the lower end of steam through hole connects condenser and gas-liquid separator, 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, and the seaming chuck pore is connected the methane gas cylinder with pipeline with pressure regulator valve, and six-way valve connects the upper pressing cap hole with pipeline, condenser, fuel tank, high-pressure oil pump and steam channel, the water tank below connects steam generator with water pump.
The invention has the beneficial effects as follows: the dual-purpose three axle desorb permeability experimental facilities of steam and electrical heating increase Gas-bearing Coal Seams temperature by coal seam, injecting heat increases the gas molecular activity, the gas molecule 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 axles to load and sealing gas, steam, the coal body airtight container of oil, obtain coal body permeability and desorption quantity performance parameter under steam injection or electro ultrafiltration, for reasonable extraction and the comprehensive utilization of coal-bed gas resource provides strong technical data.
The accompanying drawing explanation
Below in conjunction with accompanying drawing, with embodiment, illustrate.
Fig. 1 is the steam heating structure figure of the dual-purpose three axle desorb permeability experimental facilities of steam and electrical heating.
Fig. 2 is the electric heating device figure of the dual-purpose three axle desorb permeability experimental facilities of steam and electrical heating.
In 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-wire; The 30-electric heater.
Embodiment
Embodiment, with reference to accompanying drawing 1, share the device in a sleeve 26, upper and lower pressure cap 7,10 and sleeve 26 in the steam heater of the dual-purpose three axle desorb permeability experimental facilities of steam and electrical heating and in electric heater unit.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, in the middle of sleeve 26, coal sample 28 is equipped with at place.The center pit that pressure head 25, upper and lower pressure head 27,25 stretch out respectively upper and lower pressure cap 7,10 is 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.Junction dress baffle plate 8 at sleeve 26 with upper pressing cap 7, at the step place of seaming chuck 27 dress piston 5, be 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 triaxial cell 6 connects condenser 11 with pipeline 18, and condenser 11 is connected water tank 17 tops with gas-liquid separator 16.Be connected methane gas cylinder 15 with pipeline 18 with pressure regulator valve 13 above seaming chuck pore 27-1.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 respectively volumetric displacement meter 2 23 and vacuum pump 19.Six-way valve 3 use 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 seaming chuck 27 in electrical heating three axle desorb permeability experimental facilities and the center pit of coal sample 28, electric heater 30 tops connect temp controlled meter 12 with wire 29, and the thermocouple sensor 9 use wires 29 on lower pressing cap 10 connect temp controlled meter 12.
The experimental technique of the dual-purpose three axle desorb permeability experimental facilities of steam and electrical heating: 1, steam three axle desorb permeability experimental facilities are steam off by-pass valve controls 4, the pressure regulator valve 13 of methane gas cylinder 15 tops, the valve of condenser 11 fronts, the valve of six-way valve 3 and volumetric displacement meter one 14 fronts, open vacuum pump 19 and vacuum pump operation valve 20 and take out the various residual gas in the coal sample 28 in triaxial cell 6, pumpdown time is generally 8 hours, vacuum tightness reaches 100Pa, close vacuum pump operation valve 20, open 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 methane gas cylinder 15, allow coal sample 28 fully adsorb, adsorption time is 12 hours, open steam control valve 4 after absorption, allow steam flow into and to be heated along the steam channel 21 in coal sample 28, allow 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, after reaching setting value, the valve of opening volumetric displacement meter one 14 fronts after steam off operation valve 4 carries out desorb to coal sample 28, desorption time is 12 hours, and desorption quantity is carried out to record; 2, electrical heating three axle desorb permeability test experimentations are heated by 30 pairs of coal samples 28 of electric heater, open temp controlled meter 12 simultaneously, after temperature reaches requirement, electric heater 30 cuts out automatically, 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 Steam Heating three axle experimental provisions.
Claims (1)
1. a steam and the dual-purpose three axle 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), wire (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 the middle of sleeve (26), coal sample (28) is equipped with at place, 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, at the step place of seaming chuck (27) dress piston (5), be 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 lower pressing cap hole (10-1), upper, push-down head (27, 25) axially be equipped with, push-down head pore (27-1, 25-1), fill electric heater (30) in the seaming chuck with in electrically heated device (27) and the concentricity hole of coal sample (28), electric heater (30) uses respectively wire (29) to be connected temp controlled meter (12) with thermocouple sensor (9), upper in steam-heated device, push-down head (27, 25) and the concentricity Kong Zhongshe steam channel (21) of coal sample (28), steam channel (21) top connects steam control valve (4) with pipeline (18), 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), 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) with pipeline (18), condenser (11), fuel tank (2), high-pressure oil pump (24) and steam channel (21), water tank (17) below connects steam generator (1) with water pump (22).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012101611408A CN102680373B (en) | 2012-05-23 | 2012-05-23 | Double-purpose vapor and electric-heating three-shaft desorption and permeation test device |
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| CN2012101611408A CN102680373B (en) | 2012-05-23 | 2012-05-23 | Double-purpose vapor and electric-heating three-shaft desorption and permeation test device |
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| CN102680373A CN102680373A (en) | 2012-09-19 |
| CN102680373B true CN102680373B (en) | 2013-12-11 |
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| CN102901801B (en) * | 2012-09-29 | 2014-11-05 | 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 |
| 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 |
| 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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| CN102954978B (en) * | 2012-11-13 | 2016-04-20 | 中国地质大学（北京） | A kind of Magnetic resonance imaging observation device of coal petrography fracture development process and method |
| 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 |
| CN104535455B (en) * | 2015-01-07 | 2018-04-20 | 河南理工大学 | Dynamic monitoring pore pressure is distributed and the gas porous flow experimental provision and method of change |
| 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 |
| CN105807028B (en) * | 2016-04-01 | 2017-12-05 | 太原理工大学 | Using the experimental rig of high-temperature steam heating coal body desorption gas |
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| CN105910974B (en) * | 2016-06-12 | 2018-10-02 | 河南理工大学 | A kind of experimental method and device of test coal seam with gas equipressure imbibition effect |
| 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 |
| CN109187926B (en) * | 2018-09-18 | 2021-04-20 | 太原理工大学 | Three-axis seepage test device for fractured coal rock mass and desorption-diffusion-seepage test system |
| CN110031601A (en) * | 2019-04-08 | 2019-07-19 | 太原理工大学 | A kind of coal gas adsorption-desorption performance testing device |
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