CN103696746B - A kind of microwave excitation Desorption And Seepage of Coalbed Methane experimental facilities - Google Patents
A kind of microwave excitation Desorption And Seepage of Coalbed Methane experimental facilities Download PDFInfo
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- CN103696746B CN103696746B CN201310727459.7A CN201310727459A CN103696746B CN 103696746 B CN103696746 B CN 103696746B CN 201310727459 A CN201310727459 A CN 201310727459A CN 103696746 B CN103696746 B CN 103696746B
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Abstract
A kind of microwave excitation Desorption And Seepage of Coalbed Methane experimental facilities, belongs to Desorption And Seepage of Coalbed Methane experimental facilities.The present invention can realize the functional test to coal body Desorption And Seepage, obtains coal body Desorption And Seepage rule under microwave action, for the reasonable extraction of coal bed gas resource and comprehensive utilization provide reliable data.The present invention includes three axle water booster system and microwave generating apparatus, three axle water booster systems are made up of upper and lower gland, cylindrical shell, piston, baffle plate and upper and lower pressure head, microwave generating apparatus is made up of microwave antenna, waveguide, resonator, magnetron and controller, upper and lower gland is separately positioned on the upper and lower part of cylindrical shell, lower cover inside is provided with piston, lower cover inside wall is fixed with baffle plate, lower cover inside is provided with push-down head, cylindrical shell inside wall is provided with microwave antenna; In cylindrical shell, be provided with seaming chuck, have waveguide, resonator, magnetron and controller in cylindrical shell outer setting.
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 methane (accounting for more than 85%) mainly, is commonly referred to gas or biogas, is important emerging energy.China is coal bed gas energy storage big country, not only coal mine production safety coefficient can be increased to the exploitation of coal bed gas, increase economic efficiency, China's energy shortage situation can also be alleviated greatly, but China's most area coal seam belongs to low permeability coal seam, the extraction efficiency of coal bed gas is extremely low, cannot carry out conventional commercial exploitation.
Heating exploitation method is the method for carrying out coal-bed gas exploitation for low permeability coal seam.Utilize heat energy to inject and improve Desorption And Seepage of Coalbed Methane speed, thus reach the object increasing 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 improving methane output in theory, when 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 compare, its heat production and heat exchange pattern are different, and microwave can penetrate medium and is directly conducted in medium molecule by energy, 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 the very potential exploitation method of one.Existing Desorption And Seepage of Coalbed Methane experimental facilities mainly concentrates in electrical heating and steam heat injection mode, complexity due to microwave energy transfer, loading adopts microwave action cannot simulate formation coal petrography stress in the experimental facilities of coal petrography at present, and under making microwave action, Desorption And Seepage of Coalbed Methane process cannot carry out experimental study.
Summary of the invention
For prior art Problems existing, 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, the functional test to Desorption And Seepage of Coalbed Methane can be realized, obtain Desorption And Seepage of Coalbed Methane rule under microwave action, for the reasonable extraction of coal bed gas resource and comprehensive utilization provide 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, comprises 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 composition, on, lower cover is separately positioned on the upper of cylindrical shell, bottom, upper, the bottom surface of lower cover is respectively arranged with, lower cover through hole, lower cover inside is provided with piston, lower cover above piston or the inside wall of cylindrical shell are fixed with baffle plate, the push-down head of baffle plate is provided through in lower cover inside, push-down head first is provided with protruding in the bottom of push-down head, the outer end of push-down head first projection is arranged on the outside of lower cover, the inside of push-down head and push-down head first projection is provided with through push-down head venthole and push-down head through hole, in push-down head through hole, is provided with temperature pick up, cylindrical shell inside wall is provided with microwave antenna, seaming chuck is provided with in cylindrical shell, be provided with seaming chuck first at the top of seaming chuck protruding, the outer end of seaming chuck first projection is arranged on upper press cover outside, and the inside of seaming chuck and seaming chuck first projection is provided with through seaming chuck air inlet, have waveguide, resonator, magnetron and controller in cylindrical shell outer setting, 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, have heat-shrink tube in the outer setting of coal body, seaming chuck and push-down head, push-down head through hole is connected with the inside of coal body, and the temperature-sensitive part of temperature pick up is arranged on the inside of coal body.
The inside wall of the cylinder body bottom above described baffle plate is provided with antenna holder, and antenna holder inside wall is provided with helical groove, and 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.
Lower cover inside wall below described cylindrical shell is provided with projection, and described baffle plate is arranged between cylindrical shell bottom surface and upper convex surface.
The sidewall of the push-down head above described seaming chuck and baffle plate is provided with taper surface, taper surface is provided with pressure pad, pressure pad is fixed on taper surface by clamp nut, clamp nut and upper and lower pressure head sidewall are 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 the reasonable extraction of coal bed gas resource and comprehensive utilization provide reliable data; Experimental facilities structure of the present invention is simple, 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 first is protruding, 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 first is protruding, 17-heat-shrink tube, 18-controller.
Detailed description of the invention
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, all axially through hole is provided with in the middle part of the bottom surface of lower cover, upper, the bottom edge of lower cover is respectively arranged with, lower cover through hole, in lower cover 11 inside, the piston 9 with through hole is set, the lateral wall of piston 9 and the inside wall close contact of lower cover 11, and piston 9 can along on the inside wall of lower cover 11, lower movement, piston 9 lower cover 11 inside wall above piston 9 fixedly has the baffle plate 10 of through hole, so that can move up and down when on-load pressure, the push-down head 8 of baffle plate 10 through hole is provided through in lower cover 11 inside, columniform push-down head first projection 83 is provided with in the bottom of push-down head 8, the outer end of push-down head first projection 83 is arranged on the outside of lower cover 11 successively by the through hole of piston 9, the through hole of lower cover 11, axially be provided with through push-down head venthole 81 and push-down head through hole 82 in the inside of push-down head 8 and push-down head first projection 83, in push-down head through hole 82, be provided with shaft-like temperature pick up 5, inside wall bottom cylindrical shell 12 above baffle plate 10 is provided with antenna holder 13, antenna holder 13 inside wall is provided with helical groove, has the spiral part of microwave antenna 6 at helical groove internal fixtion, seaming chuck 16 is provided with in cylindrical shell 12 above push-down head, seaming chuck 16 top is provided with seaming chuck first projection 162, the outer end of seaming chuck first projection 162 is arranged on the outside of upper press cover 15 by the through hole of upper press cover 15, be axially provided with through seaming chuck air inlet 161 in the inside of seaming chuck 16 and seaming chuck first projection 162, waveguide 7, resonator 1, magnetron 2 and controller 18 is had in cylindrical shell 12 outer setting, 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, there is provided power supply needed for magnetron 2 by controller 18, changed the power output of magnetron 2 by the output current adjusting controller 18, antenna holder 13 and cylindrical shell 12 sidewall are provided with through hole, and the end portion of microwave antenna 6 is arranged in waveguide 7 by the through hole on antenna holder 13 and cylindrical shell 12 sidewall, and waveguide 7 end face and cylindrical shell 12 outer wall close contact, prevent microwave leakage, the coal body 14 with central channel is set during experiment between upper and lower pressure head, coal body 14 center is arranged on bottom central channel, central channel opening is arranged on bottom coal body 14, 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, seal coal body 14, push-down head through hole 82 is connected with the central channel of coal body 14, and the temperature-sensitive part on temperature pick up 5 top is 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 is detected in time.
The temperature-sensitive part of described temperature pick up 5 is t type thermocouple, and t type thermocouple model is: WRC.
It is outside that described upper and lower gland is all arranged on cylindrical shell 12, and be threaded connection with cylindrical shell 12.
Lower cover 11 inside wall below described cylindrical shell 12 is provided with projection, and described baffle plate 10 is arranged between cylindrical shell 12 bottom surface and upper convex surface.
The sidewall of the push-down head 8 above described seaming chuck 16 and baffle plate 10 is provided with taper surface, taper surface is provided with pressure pad 4, pressure pad 4 is fixed on taper surface by clamp nut 3, clamp nut 3 and upper and lower pressure head sidewall are 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 sealed by heat-shrink tube 17, the liquid loaded or gas enter from upper press cover through hole 151 and lower cover through hole 111, the gas be 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 be 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 loading coal body 14 3 axle.Coal bed gas can first be imported by seaming chuck air inlet 161, after coal body 14 fully absorption, discharged by push-down head venthole 81, carry out desorption quantity mensuration, waveguide 7 is imported after the microwave that magnetron 2 produces changes 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 of high frequency change is formed in coal body 14 by helical form microwave antenna 6, in coal bed gas desorption process, coal body 14 is encouraged, by the temperature-sensitive part on temperature pick up 5 top bottom coal body 14 central channel, coal body 14 central temperature is measured, the power output of magnetron 2, microwave antenna 6 parameter and microwave heating time is changed by adjusting controller 18, obtain the data such as corresponding coal bed gas desorption rate, coal body 14 permeability, coal body 14 temperature in contrast microwave action process draws microwave excitation and coal body 14 desorb and Percolation Law, provides foundation to rationally increasing production coal bed gas.
Claims (3)
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 composition, on, lower cover is separately positioned on the upper of cylindrical shell, bottom, upper, the bottom surface of lower cover is respectively arranged with, lower cover through hole, lower cover inside is provided with piston, lower cover above piston or the inside wall of cylindrical shell are fixed with baffle plate, the push-down head of baffle plate is provided through in lower cover inside, push-down head first is provided with protruding in the bottom of push-down head, the outer end of push-down head first projection is arranged on the outside of lower cover, the inside of push-down head and push-down head first projection is provided with through push-down head venthole and push-down head through hole, temperature pick up is provided with in push-down head through hole, cylindrical shell inside wall is provided with microwave antenna, seaming chuck is provided with in cylindrical shell, be provided with seaming chuck first at the top of seaming chuck protruding, the outer end of seaming chuck first projection is arranged on upper press cover outside, and the inside of seaming chuck and seaming chuck first projection is provided with through seaming chuck air inlet, have waveguide, resonator, magnetron and controller in cylindrical shell outer setting, 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, have heat-shrink tube in the outer setting of coal body, seaming chuck and push-down head, push-down head through hole is connected with the inside of coal body, and the temperature-sensitive part of temperature pick up is arranged on the inside of coal body,
The inside wall of the cylinder body bottom above described baffle plate is provided with antenna holder, antenna holder inside wall is 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;
The sidewall of the push-down head above described seaming chuck and baffle plate is provided with taper surface, taper surface is provided with pressure pad, pressure pad is fixed on taper surface by clamp nut, clamp nut and upper and lower pressure head sidewall are to be threaded, and heat-shrink tube two ends are fixed on upper and lower pressure head by pressure pad and clamp nut.
2. a kind of 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.
3. a kind of microwave excitation Desorption And Seepage of Coalbed Methane experimental facilities according to claim 1, is characterized in that: the lower cover inside wall below described cylindrical shell is provided with projection, and described baffle plate is arranged between cylindrical shell bottom surface and upper convex surface.
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| CN201310727459.7A CN103696746B (en) | 2013-12-25 | 2013-12-25 | A kind of microwave excitation Desorption And Seepage of Coalbed Methane experimental facilities |
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| CN201310727459.7A CN103696746B (en) | 2013-12-25 | 2013-12-25 | A kind of microwave excitation Desorption And Seepage of Coalbed Methane experimental facilities |
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| CN103696746B true CN103696746B (en) | 2016-04-20 |
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| CN105735954B (en) * | 2016-01-29 | 2018-04-27 | 辽宁工程技术大学 | A kind of electromagnetic heat radiation coal seam is anti-reflection boring rod set and its application method |
| CN105738578B (en) * | 2016-04-11 | 2017-06-23 | 河南理工大学 | Microwave encourages coal petrography gas adsorption-desorption characteristics experimental provision 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 |
| 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 |
| WO2020024658A1 (en) * | 2018-08-02 | 2020-02-06 | 西南石油大学 | Experimental method for verifying feasibility of coalbed methane microwave mining |
| 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 |
| 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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| JPH01282464A (en) * | 1988-05-10 | 1989-11-14 | Chubu Electric Power Co Inc | Moisture measuring device |
| US6307191B1 (en) * | 1999-12-30 | 2001-10-23 | Marathon Oil Compamy | Microwave heating system for gas hydrate removal or inhibition in a hydrocarbon pipeline |
| CN103089295B (en) * | 2013-01-23 | 2015-10-28 | 重庆大学 | Coal bed gas extraction test method in multiple seam unitized production process |
| CN103114871A (en) * | 2013-03-04 | 2013-05-22 | 刘永杰 | Extraction device and method utilizing microwave coal heating layer |
| CN203626782U (en) * | 2013-12-25 | 2014-06-04 | 辽宁工程技术大学 | Microwave excitation coalbed methane desorption seepage experimental device |
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