CN103696746A - Microwave excitation coal-bed gas desorption and seepage experimental device - Google Patents
Microwave excitation coal-bed gas desorption and seepage experimental device Download PDFInfo
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- CN103696746A CN103696746A CN201310727459.7A CN201310727459A CN103696746A CN 103696746 A CN103696746 A CN 103696746A CN 201310727459 A CN201310727459 A CN 201310727459A CN 103696746 A CN103696746 A CN 103696746A
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Abstract
The invention discloses a microwave excitation coal-bed gas desorption and seepage experimental device, and belongs to coal-bed gas desorption and seepage experimental devices. The microwave excitation coal-bed gas desorption and seepage experimental device comprises a tri-axial pressure device and a microwave generating device. The tri-axial pressure device comprises an upper gland, a lower gland, a barrel, a piston, a barrier, an upper pressure head and a lower pressure head, the microwave generating device comprises a microwave antenna, a waveguide tube, a resonant cavity, a magnetron and a controller, the upper gland and the lower gland are respectively arranged on the upper portion and the lower portion of the barrel, the piston is arranged inside the lower gland, the barrier is fixed onto the inner side wall of the lower gland, the lower pressure head is arranged inside the lower gland, and the microwave antenna is arranged on the inner side wall of the barrel; the upper pressure head is arranged in the barrel, and the waveguide tube, the resonant cavity, the magnetron and the controller are arranged on the outside of the barrel. The microwave excitation coal-bed gas desorption and seepage experimental device has the advantages that desorption and seepage functional tests can be carried out on coal, desorption and seepage laws of the coal under a microwave effect can be acquired, and reliable data can be provided for reasonably draining and comprehensively utilizing coal-bed gas resources.
Description
Technical field
The invention belongs to Desorption And Seepage of Coalbed Methane experimental facilities, particularly relate to a kind of microwave excitation Desorption And Seepage of Coalbed Methane experimental facilities.
Background technology
Coal bed gas composition is mainly methane (accounting for more than 85%), is commonly referred to gas or biogas, is important emerging energy.China is coal bed gas energy storage big country, to the exploitation of coal bed gas, not only can increase coal mine production safety coefficient, increase economic efficiency, can also alleviate greatly China's energy shortage situation, but coal seam, China most areas belongs to low permeability coal seam, the extraction efficiency of coal bed gas is extremely low, cannot carry out conventional industrialization exploitation.
Heating exploitation method is for low permeability coal seam, to carry out the method for coal-bed gas exploitation.Utilize heat energy to inject and improve Desorption And Seepage of Coalbed Methane speed, thereby reach the object that increases substantially methane output.The technical way of heating exploitation method is electrical heating, steam heat injection and heating using microwave.Although heating exploitation method can realize the object that improves methane output in theory, while exploiting for heat injection, the research of the Desorption And Seepage process of coal bed gas is also far from reaching the degree that mechanism is clear, rule is clear and definite, also cannot drop into industrial production.Heating using microwave and steam, Electric heating comparison, its heat production and heat exchange pattern are different, and the penetrable medium of microwave is directly conducted into energy in medium molecule, and by the vibrations of molecule, friction generates heat, therefore can heat object deep, and have the higher thermal efficiency.Therefore utilizing microwave to carry out heating exploitation coal bed gas is a kind of very potential exploitation method.Existing Desorption And Seepage of Coalbed Methane experimental facilities mainly concentrates in electrical heating and steam heat injection mode, due to the complexity of microwave energy transfer, loading adopts microwave action at present cannot simulate formation coal petrography stress in the experimental facilities of coal petrography, make Desorption And Seepage of Coalbed Methane process under microwave action cannot carry out experimental study.
Summary of the invention
The problem existing for prior art, the invention provides a kind of microwave excitation Desorption And Seepage of Coalbed Methane experimental facilities, this experimental facilities has three axle value-added tax functions, can realize the functional test to Desorption And Seepage of Coalbed Methane, obtain Desorption And Seepage of Coalbed Methane rule under microwave action, for reasonable extraction and the comprehensive utilization of coal bed gas resource provides reliable data.
To achieve these goals, the present invention adopts following technical scheme: a kind of microwave excitation Desorption And Seepage of Coalbed Methane experimental facilities, comprise three axle water booster system and microwave generating apparatus, and three axle water booster systems are by upper, lower cover, cylindrical shell, piston, baffle plate and on, push-down head forms, and microwave generating apparatus is by microwave antenna, waveguide, resonator, magnetron and controller form, on, lower cover is separately positioned on the upper of cylindrical shell, bottom, upper, on the bottom surface of lower cover, be respectively arranged with, lower cover through hole, in lower cover inside, be provided with piston, on the inside wall of the lower cover above piston or cylindrical shell, be fixed with baffle plate, in lower cover inside, be provided with the push-down head through baffle plate, in the bottom of push-down head, be provided with push-down head the first projection, the outer end of push-down head the first projection is arranged on the outside of lower cover, is provided with push-down head venthole and the push-down head through hole of perforation in the inside of push-down head and push-down head the first projection, in push-down head through hole, is provided with temperature pick up, on cylindrical shell inside wall, be provided with microwave antenna, in cylindrical shell, be provided with seaming chuck, at the top of seaming chuck, be provided with seaming chuck the first projection, the outer end of seaming chuck the first projection is arranged on upper press cover outside, is provided with the seaming chuck air inlet of perforation in the inside of seaming chuck and seaming chuck the first projection, in cylindrical shell outer setting, have waveguide, resonator, magnetron and controller, one end of resonator is connected with magnetron, and the other end is connected with waveguide, and magnetron is connected with controller, and one end of microwave antenna is arranged in waveguide, between upper and lower pressure head, be provided with coal body, in the outer setting of coal body, seaming chuck and push-down head, have heat-shrink tube, push-down head through hole is connected with the inside of coal body, and the temperature-sensitive of temperature pick up is partly arranged on the inside of coal body.
On the inside wall of the cylinder body bottom above described baffle plate, be provided with antenna holder, on antenna holder inside wall, be provided with helical groove, microwave antenna is arranged in helical groove.
Described microwave antenna is corresponding with the temperature-sensitive part of temperature pick up.
Described upper and lower gland is all arranged on cylindrical shell outside, and is threaded connection with cylindrical shell.
On lower cover inside wall below described cylindrical shell, be provided with projection, described baffle plate is arranged between cylindrical shell bottom surface and protruding upper surface.
On the sidewall of the push-down head above described seaming chuck and baffle plate, be provided with taper surface, on taper surface, be provided with pressure pad, pressure pad is fixed on taper surface by clamp nut, clamp nut is with upper and lower pressure head sidewall to be threaded, and heat-shrink tube two ends are fixed on upper and lower pressure head by pressure pad and clamp nut.
Beneficial effect of the present invention:
Experimental facilities of the present invention has three axle value-added tax functions, can realize the functional test to Desorption And Seepage of Coalbed Methane, obtains Desorption And Seepage of Coalbed Methane performance parameter under microwave action, for reasonable extraction and the comprehensive utilization of coal bed gas resource provides reliable data; Experimental facilities of the present invention is simple in structure, dependable performance, easy to operate, cost-saving.
Accompanying drawing explanation
Fig. 1 is the structural representation of microwave excitation Desorption And Seepage of Coalbed Methane experimental facilities of the present invention;
In figure, 1-resonator, 2-magnetron, 3-clamp nut, 4-pressure pad, 5-temperature pick up, 6-microwave antenna, 7-waveguide, 8-push-down head, 81-push-down head venthole, 82-push-down head through hole, 83-push-down head the first projection, 9-piston, 10-baffle plate, 11-lower cover, 111-lower cover through hole, 12-cylindrical shell, 13-antenna holder, 14-coal body, 15-upper press cover, 151-upper press cover through hole, 16-seaming chuck, 161-seaming chuck air inlet, 162-seaming chuck the first projection, 17-heat-shrink tube, 18-controller.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
As shown in Figure 1, a kind of microwave excitation Desorption And Seepage of Coalbed Methane experimental facilities, comprise three axle water booster system and microwave generating apparatus, three axle water booster systems are by columnar, lower cover, cylindrical shell 12, piston 9, baffle plate 10 and columniform on, push-down head forms, microwave generating apparatus is by microwave antenna 6, waveguide 7, resonator 1, magnetron 2 and controller 18 form, on, lower cover is separately positioned on the upper of cylindrical shell 12, bottom, upper, the middle part, bottom surface of lower cover is all axially provided with through hole, upper, the bottom edge of lower cover is respectively arranged with, lower cover through hole, at the inner piston 9 with through hole that arranges of lower cover 11, the inside wall close contact of the lateral wall of piston 9 and lower cover 11, and piston 9 can be on the inside wall of lower cover 11, lower movement, the baffle plate 10 fixedly on lower cover 11 inside walls above piston 9 with through hole, so that piston 9 can move up and down the in the situation that of on-load pressure, in lower cover 11 inside, be provided with the push-down head 8 through baffle plate 10 through holes, in the bottom of push-down head 8, be provided with columniform push-down head the first projection 83, the outer end of push-down head the first projection 83 successively by the through hole of piston 9, the through hole of lower cover 11 is arranged on the outside of lower cover 11, at the inner shaft of push-down head 8 and push-down head the first projection 83, to the push-down head venthole 81 and the push-down head through hole 82 that are provided with perforation, in push-down head through hole 82, be provided with shaft-like temperature pick up 5, on the inside wall of cylindrical shell 12 bottoms above baffle plate 10, be provided with antenna holder 13, on antenna holder 13 inside walls, be provided with helical groove, in helical groove, be fixed with the spiral part of microwave antenna 6, in cylindrical shell 12 above push-down head, be provided with seaming chuck 16, at seaming chuck 16 tops, be provided with seaming chuck the first projection 162, the outer end of seaming chuck the first projection 162 is arranged on the outside of upper press cover 15 by the through hole of upper press cover 15, at the inner shaft of seaming chuck 16 and seaming chuck the first projection 162 to the seaming chuck air inlet 161 that is provided with perforation, in cylindrical shell 12 outer setting, there are waveguide 7, resonator 1, magnetron 2 and controller 18, resonator 1 one end is connected with magnetron 2, the other end is connected with horizontally disposed waveguide 7, the output interface of controller 18 is connected with the power end of magnetron 2, by controller 18, provide magnetron 2 required power supply, by adjusting the output current of controller 18, change the power output of magnetron 2, on antenna holder 13 and cylindrical shell 12 sidewalls, be provided with through hole, the end portion of microwave antenna 6 is arranged in waveguide 7 by the through hole on antenna holder 13 and cylindrical shell 12 sidewalls, and waveguide 7 end faces and cylindrical shell 12 outer wall close contacts, prevent microwave leakage, the coal body 14 with central channel is set during experiment between upper and lower pressure head, central channel bottom is arranged on coal body 14 centers, central channel opening is arranged on coal body 14 bottoms, the outer setting of the push-down head 8 above coal body 14, seaming chuck 16 and baffle plate 10 has heat-shrink tube 17, heat-shrink tube 17 two ends are separately fixed on upper and lower pressure head, and coal body 14 is sealed, push-down head through hole 82 is connected with the central channel of coal body 14, and the temperature-sensitive on temperature pick up 5 tops is partly arranged in the central channel of coal body 14.
Described microwave antenna 6 is corresponding with the temperature-sensitive part of temperature pick up 5, is convenient to temperature pick up 5 and microwave heating temperature detected in time.
The temperature-sensitive of described temperature pick up 5 is partly t type thermocouple, and t type thermocouple model is: WRC.
Described upper and lower gland is all arranged on cylindrical shell 12 outsides, and is threaded connection with cylindrical shell 12.
On lower cover 11 inside walls below described cylindrical shell 12, be provided with projection, described baffle plate 10 is arranged between cylindrical shell 12 bottom surfaces and protruding upper surface.
On the sidewall of the push-down head 8 above described seaming chuck 16 and baffle plate 10, be provided with taper surface, on taper surface, be provided with pressure pad 4, pressure pad 4 is fixed on taper surface by clamp nut 3, clamp nut 3 is with upper and lower pressure head sidewall to be threaded, and heat-shrink tube 17 two ends are fixed on upper and lower pressure head by pressure pad 4 and clamp nut 3.
The model of described magnetron 2 is 2M219K.
Below in conjunction with accompanying drawing, a use procedure of the present invention is described:
As shown in Figure 1, in the space of sealing, coal body 14 is fixed between seaming chuck 16 and push-down head 8, and seal by heat-shrink tube 17, the liquid or the gas that load use enter from upper press cover through hole 151 and lower cover through hole 111, the gas being filled with from upper press cover through hole 151 or liquid directly act on heat-shrink tube 17, load on around coal body 14, the gas being filled with from lower cover through hole 111 or liquid effects are in piston 9, piston 9 promotes push-down head 8, load axial compression to coal body 14, realize coal body 14 3 axles are loaded.Coal bed gas can first be imported by seaming chuck air inlet 161, after coal body 14 fully adsorbs, by push-down head venthole 81, discharge, carry out desorption quantity mensuration, the microwave that magnetron 2 produces imports waveguide 7 after changing transmission direction by resonator 1, waveguide 7 changes transformation parameter by microwave antenna termination 61 and is transferred to helical form microwave antenna 6, the magnetic fields that forms high frequency variation by helical form microwave antenna 6 is in coal body 14, in coal bed gas desorption process, coal body 14 is encouraged, the temperature-sensitive part on temperature pick up 5 tops by coal body 14 central channels bottoms, coal body 14 central temperatures are measured, by adjusting controller 18, change power output, microwave antenna 6 parameters and the microwave heating time of magnetron 2, obtain the data such as corresponding coal bed gas desorption rate, coal body 14 permeabilities, coal body 14 temperature in contrast microwave action process draw microwave excitation and coal body 14 desorbs and Percolation Law, to reasonable volume increase coal bed gas, provide foundation.
Claims (6)
1. a microwave excitation Desorption And Seepage of Coalbed Methane experimental facilities, it is characterized in that comprising three axle water booster system and microwave generating apparatus, three axle water booster systems are by upper, lower cover, cylindrical shell, piston, baffle plate and on, push-down head forms, microwave generating apparatus is by microwave antenna, waveguide, resonator, magnetron and controller form, on, lower cover is separately positioned on the upper of cylindrical shell, bottom, upper, on the bottom surface of lower cover, be respectively arranged with, lower cover through hole, in lower cover inside, be provided with piston, on the inside wall of the lower cover above piston or cylindrical shell, be fixed with baffle plate, in lower cover inside, be provided with the push-down head through baffle plate, in the bottom of push-down head, be provided with push-down head the first projection, the outer end of push-down head the first projection is arranged on the outside of lower cover, in the inside of push-down head and push-down head the first projection, be provided with push-down head venthole and the push-down head through hole of perforation, in push-down head through hole, be provided with temperature pick up, on cylindrical shell inside wall, be provided with microwave antenna, in cylindrical shell, be provided with seaming chuck, at the top of seaming chuck, be provided with seaming chuck the first projection, the outer end of seaming chuck the first projection is arranged on upper press cover outside, is provided with the seaming chuck air inlet of perforation in the inside of seaming chuck and seaming chuck the first projection, in cylindrical shell outer setting, have waveguide, resonator, magnetron and controller, one end of resonator is connected with magnetron, and the other end is connected with waveguide, and magnetron is connected with controller, and one end of microwave antenna is arranged in waveguide, between upper and lower pressure head, be provided with coal body, in the outer setting of coal body, seaming chuck and push-down head, have heat-shrink tube, push-down head through hole is connected with the inside of coal body, and the temperature-sensitive of temperature pick up is partly arranged on the inside of coal body.
2. microwave excitation Desorption And Seepage of Coalbed Methane experimental facilities according to claim 1, it is characterized in that being provided with antenna holder on the inside wall of the cylinder body bottom above described baffle plate, on antenna holder inside wall, be provided with helical groove, microwave antenna is arranged in helical groove.
3. microwave excitation Desorption And Seepage of Coalbed Methane experimental facilities according to claim 1, is characterized in that described microwave antenna is corresponding with the temperature-sensitive part of temperature pick up.
4. microwave excitation Desorption And Seepage of Coalbed Methane experimental facilities according to claim 1, is characterized in that described upper and lower gland is all arranged on cylindrical shell outside, and is threaded connection with cylindrical shell.
5. microwave excitation Desorption And Seepage of Coalbed Methane experimental facilities according to claim 1, is characterized in that being provided with projection on the lower cover inside wall below described cylindrical shell, and described baffle plate is arranged between cylindrical shell bottom surface and protruding upper surface.
6. microwave excitation Desorption And Seepage of Coalbed Methane experimental facilities according to claim 1, it is characterized in that being provided with taper surface on the sidewall of the push-down head above described seaming chuck and baffle plate, on taper surface, be provided with pressure pad, pressure pad is fixed on taper surface by clamp nut, clamp nut is with upper and lower pressure head sidewall to be threaded, and heat-shrink tube two ends are fixed on upper and lower pressure head by pressure pad and clamp nut.
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Cited By (9)
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| CN105735954A (en) * | 2016-01-29 | 2016-07-06 | 辽宁工程技术大学 | Electromagnetic heat-radiation coal bed permeability improvement drill rod device and using method thereof |
| CN105738578A (en) * | 2016-04-11 | 2016-07-06 | 河南理工大学 | Microwave radiation excited coal-rock gas adsorption and desorption characteristic experiment device and method |
| CN107101907A (en) * | 2017-06-19 | 2017-08-29 | 辽宁工程技术大学 | A kind of excitation of electromagnetic wave Unconventional gas seepage experimental apparatus |
| CN108717033A (en) * | 2018-05-14 | 2018-10-30 | 华北科技学院 | A kind of experimental provision and experimental method improving coal gas desorption efficiency using magnetic-particle |
| CN109115659A (en) * | 2018-08-02 | 2019-01-01 | 西南石油大学 | A kind of experimental method for verifying coal bed gas microwave mining feasibility |
| WO2020024658A1 (en) * | 2018-08-02 | 2020-02-06 | 西南石油大学 | Experimental method for verifying feasibility of coalbed methane microwave mining |
| CN110823757A (en) * | 2019-11-28 | 2020-02-21 | 辽宁工程技术大学 | Low-permeability coal bed gas microwave-liquid nitrogen circulating freeze-thaw degradation-promotion permeability-increasing experimental device and method |
| CN110823707A (en) * | 2019-11-18 | 2020-02-21 | 中国矿业大学 | Sample true triaxial sealing loading device and method for pressure-relief coal bed gas development simulation |
| 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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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105735954A (en) * | 2016-01-29 | 2016-07-06 | 辽宁工程技术大学 | Electromagnetic heat-radiation coal bed permeability improvement drill rod device and using method thereof |
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| CN107101907A (en) * | 2017-06-19 | 2017-08-29 | 辽宁工程技术大学 | A kind of excitation of electromagnetic wave Unconventional gas seepage experimental apparatus |
| CN108717033A (en) * | 2018-05-14 | 2018-10-30 | 华北科技学院 | A kind of experimental provision and experimental method improving coal gas desorption efficiency using magnetic-particle |
| CN108717033B (en) * | 2018-05-14 | 2021-03-16 | 华北科技学院 | Experimental device and experimental method for improving coal gas desorption rate by using magnetic particles |
| CN109115659A (en) * | 2018-08-02 | 2019-01-01 | 西南石油大学 | A kind of experimental method for verifying coal bed gas microwave mining feasibility |
| WO2020024658A1 (en) * | 2018-08-02 | 2020-02-06 | 西南石油大学 | Experimental method for verifying feasibility of coalbed methane microwave mining |
| CN110823707A (en) * | 2019-11-18 | 2020-02-21 | 中国矿业大学 | Sample true triaxial sealing loading device and method for pressure-relief coal bed gas development simulation |
| CN110823757A (en) * | 2019-11-28 | 2020-02-21 | 辽宁工程技术大学 | Low-permeability coal bed gas microwave-liquid nitrogen circulating freeze-thaw degradation-promotion permeability-increasing experimental device and method |
| 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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