CN103698411B - Device and method for improving coal bed gas desorption efficiency with microwaves - Google Patents
Device and method for improving coal bed gas desorption efficiency with microwaves Download PDFInfo
- Publication number
- CN103698411B CN103698411B CN201310733795.2A CN201310733795A CN103698411B CN 103698411 B CN103698411 B CN 103698411B CN 201310733795 A CN201310733795 A CN 201310733795A CN 103698411 B CN103698411 B CN 103698411B
- Authority
- CN
- China
- Prior art keywords
- coal
- desorption
- microwave
- push
- controller
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Constitution Of High-Frequency Heating (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
The invention relates to a device and a method for improving coal bed gas desorption efficiency with microwaves, and belongs to the technical field of coal mine safety production. The device and the method allow the generated microwaves to act on a coal body, have a triaxial loading function, simulate a stress state of the coal body and a gas absorption and desorption process, obtain a coal body desorption rule by the action of the microwaves, and provide reference data for effective drainage and comprehensive utilization of the coal bed gas. The device comprises a microwave excitation coal bed gas desorption seepage experimental device and a triaxial coal rock pressed absorption and desorption system, wherein the triaxial coal rock pressed absorption and desorption system consists of a first pressure regulating valve, a second pressure regulating valve, a third pressure regulating valve, a methane gas cylinder, a loading gas cylinder, a confining pressure gauge, an axial pressure gauge, a pore pressure gauge, a flowmeter and a temperature control meter. The method for improving the coal bed gas desorption efficiency with the microwaves comprises the following steps of performing an absorption experiment, and performing a microwave excitation desorption experiment.
Description
Technical field
The invention belongs to Safety of Coal Mine Production technical field, relate to the device and method improving coal-seam gas desorption efficiency, particularly relate to a kind of device and method utilizing microwave to improve coal-seam gas desorption efficiency.
Background technology
Along with China's coal-mine resource exploitation is gradually to deep development, in coal body, gas bearing capacity increases gradually, and coal body permeance property and desorption of mash gas ability reduce, and cause gas drainage difficulty sharply to increase, the coal-seam gas accumulated in coal seam has a strong impact on Safety of Coal Mine Production.
In order to reasonably carry out gas drainage, to adopt at present in boring, water the conventional methods such as pressure break more.Increase quantity and the density of coal bed drilling, gas drainage amount can be improved to a certain extent; Adopt waterfrac treatment measure, increase coalmass crevasse, also can strengthen coal body permeance property.Above method is by destroying Coal Pore Structure, increases the mode of coalmass crevasse quantity or Fracture Width, and increase the infiltrative object of coal body to reach, not only cost is high, and anatonosis effect is also difficult to the object reaching expection.
Summary of the invention
For prior art Problems existing, the invention provides a kind of device and method utilizing microwave to improve coal-seam gas desorption efficiency, its by produce microwave action in coal body, and there are three axle value-added tax functions, simulate the adsorption-desorption process of stress in coal bed state and gas, obtain coal-seam gas adsorption law under microwave action, for effective extraction of coal-seam gas and comprehensive utilization provide reference data.
To achieve these goals, the present invention adopts following technical scheme: a kind of device utilizing microwave to improve coal-seam gas desorption efficiency, comprises microwave excitation Desorption And Seepage of Coalbed Methane experimental provision and coal petrography three axle pressurized adsorbent desorption system; Coal petrography three axle pressurized adsorbent desorption system by first, second, third pressure regulator valve, methane gas cylinder, add carrier gas bottle, confined pressure tensimeter, axial compression tensimeter, Pore Pressure tensimeter, valve, flow take into account temp controlled meter and form; The seaming chuck air admission hole of microwave excitation Desorption And Seepage of Coalbed Methane experimental provision is connected with methane gas cylinder, is provided with the first pressure regulator valve and Pore Pressure tensimeter between seaming chuck air admission hole and methane gas cylinder; Add carrier gas bottle to be connected with multiway valve, multiway valve is connected with first, second branch road, and the first branch road is connected with the upper press cover through hole of microwave excitation Desorption And Seepage of Coalbed Methane experimental provision, is provided with the second pressure regulator valve and confined pressure tensimeter on the first leg; Second branch road is connected with the lower cover through hole of microwave excitation Desorption And Seepage of Coalbed Methane experimental provision, and the second branch road is provided with the 3rd pressure regulator valve and axial compression tensimeter; The push-down head venthole of microwave excitation Desorption And Seepage of Coalbed Methane experimental provision is connected with one end of flow branch road, and flow branch road is provided with valve and flowmeter; The temperature sensor of microwave excitation Desorption And Seepage of Coalbed Methane experimental provision is connected with temp controlled meter, and temp controlled meter is connected with the controller of microwave excitation Desorption And Seepage of Coalbed Methane experimental provision.
Described microwave excitation Desorption And Seepage of Coalbed Methane experimental provision, comprise three axle pressue device and microwave generating apparatus, three axle pressue devices 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 cavity, 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 madial 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 sensor is provided with in push-down head through hole, cylindrical shell madial 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 admission hole, have waveguide, resonator cavity, magnetron and controller in cylindrical shell outer setting, one end of resonator cavity 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 sensor is arranged on the inside of coal body.
Described first pressure regulator valve is arranged between methane gas cylinder and Pore Pressure tensimeter.
Described second pressure regulator valve is arranged between multiway valve and confined pressure tensimeter.
Described 3rd pressure regulator valve is arranged between multiway valve and axial compression tensimeter.
Utilize microwave to improve a method for coal-seam gas desorption efficiency, adopt the device utilizing microwave to improve coal-seam gas desorption efficiency, comprise the steps:
Step one: carry out adsorption experiment;
Open the valve that multiway valve is connected with first, second branch road, adjust the 3rd pressure regulator valve and apply initial axial compression to coal body, adjust the second pressure regulator valve and apply initial confined pressure to coal body, adjust the first pressure regulator valve, apply initial apertures gap pressure to coal body, keep more than 12 hours after Pore Pressure force value is stable, coal body is fully adsorbed methane gas, connect temp controlled meter power supply, record the coal body internal temperature values now recorded by temperature sensor;
Step 2: carry out microwave excitation desorption experiment;
Close first, second, third pressure regulator valve, the initial temperature value of setting temp controlled meter, namely when Human liver glutathione is to initial temperature value, temp controlled meter automatic cutting controller power supply; The output power of setting controller, connect controller power source, when the temperature value of coal body inside reaches the initial temperature value of temp controlled meter, Open valve, by the methane gas volume exported in the cmf record unit interval, until export without gas, desorption process terminates, close first, second, third pressure regulator valve and valve, close the power supply of temp controlled meter, controller and magnetron;
Step 3: repeat step one, two, and change the output power of controller during the course;
Step 4: repeat step one, two, and change Pore Pressure force value by adjustment first pressure regulator valve during the course, the output power of controller is identical with the output power of the controller in step 3;
Step 5: repeat step one, two, and confined pressure force value and the axial compression force value of coal body is changed during the course respectively by second, third pressure regulator valve of adjustment, the output power of controller is identical with the output power of the controller in step 3 or four, and Pore Pressure force value is identical with the Pore Pressure force value in step 4.
The impermeability utilizing microwave to improve the device of coal-seam gas desorption efficiency was checked before carrying out described step one.
Beneficial effect of the present invention:
The present invention is compared with other technology improving coal-seam gas recovery ratio, the inventive method utilizes the incentive action of microwave action realization to coal body interior media molecule, the heat energy by producing from coal body inside is made to accelerate methane molecule solution adsorption desorption, and improve methane gas molecule parsing amount and resolution speed by the operational factors changing microwave, for the reasonable extraction of coal bed gas resource and comprehensive utilization provide reliable method; The inventive method is simple, convenient, dependable performance.
Accompanying drawing explanation
Fig. 1 is the structural representation utilizing microwave to improve the device of coal-seam gas desorption efficiency of the present invention;
In figure, 1-resonator cavity, 2-magnetron, 3-gland nut, 4-pressure pad, 5-temperature sensor, 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 admission hole, 162-seaming chuck first is protruding, 17-heat-shrink tube, 18-controller, 19-microwave excitation Desorption And Seepage of Coalbed Methane experimental provision, 20-coal petrography three axle pressurized adsorbent desorption system, 21-methane gas cylinder, 22-the first pressure regulator valve, 23-Pore Pressure tensimeter, 24-nitrogen gas cylinder, 25-multiway valve, 26-the second pressure regulator valve, 27-confined pressure tensimeter, 28-the three pressure regulator valve, 29-axial compression tensimeter, 30-valve, 31-flowmeter, 32-temp controlled meter.
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 device utilizing microwave to improve coal-seam gas desorption efficiency, comprises microwave excitation Desorption And Seepage of Coalbed Methane experimental provision 19 and coal petrography three axle pressurized adsorbent desorption system 20; Coal petrography three axle pressurized adsorbent desorption system 20 is made up of first, second, third pressure regulator valve, methane gas cylinder 21, nitrogen gas cylinder 24, confined pressure tensimeter 27, axial compression tensimeter 29, Pore Pressure tensimeter 23, valve 30, flowmeter 31 and temp controlled meter 32; The seaming chuck air admission hole 161 of microwave excitation Desorption And Seepage of Coalbed Methane experimental provision 19 is connected by gas circuit pipe with methane gas cylinder 21, gas circuit pipe between seaming chuck air admission hole 161 and methane gas cylinder 21 is provided with the first pressure regulator valve 22 and Pore Pressure tensimeter 23, first pressure regulator valve 22 is used for controlling methane gas cylinder 21 injects the methane gas in coal body 14 pressure by seaming chuck air admission hole 161, and this force value is presented on Pore Pressure tensimeter 23;
Nitrogen gas cylinder 24 is connected with multiway valve 25 by gas circuit pipe, multiway valve 25 by introduce nitrogen gas respectively by first, second branch road exports, first branch road is connected with the upper press cover through hole 151 of microwave excitation Desorption And Seepage of Coalbed Methane experimental provision 19, so that nitrogen gas enters in cylindrical shell 12, the pressure of nitrogen gas acts directly on the coal body 14 that sealed by heat-shrink tube 17, be provided with the second pressure regulator valve 26 and confined pressure tensimeter 27 on the first leg, second pressure regulator valve 26 is used for controlling to enter the confined pressure force value of the nitrogen gas in cylindrical shell 12 to coal body 14 by upper press cover through hole 151, and this force value is presented on confined pressure tensimeter 27, second branch road is connected with the lower cover through hole 12 of microwave excitation Desorption And Seepage of Coalbed Methane experimental provision 19, so that nitrogen gas enters the space formed by the lower cover 11 of microwave excitation Desorption And Seepage of Coalbed Methane experimental provision 19 and piston 9, and promote piston 9 and move up, the upper surface of piston 9 promotes push-down head 8 after contacting with first of push-down head protruding 83 and moves up, push-down head 8 is made to apply axle pressure to coal body 14, second branch road is provided with the 3rd pressure regulator valve 28 and axial compression tensimeter 29, 3rd pressure regulator valve 28 is used for the nitrogen gas force value controlling to be acted on by lower cover through hole 12 on piston 9, this force value is presented on axial compression tensimeter 29, and this force value obtains the axle pressure that push-down head 8 acts on coal body 14 after converting,
The push-down head venthole 15 of microwave excitation Desorption And Seepage of Coalbed Methane experimental provision 19 is connected with one end of flow branch road, the other end of flow branch road is unsettled, flow branch road is provided with valve 30 and flowmeter 31, records by flowmeter 31 gas flow that the unit interval in coal body 14 gushes out; The temperature sensor 5 of microwave excitation Desorption And Seepage of Coalbed Methane experimental provision 19 is connected with temp controlled meter 32 by the sensor interface of temp controlled meter 32, coal body 14 temperature value that temperature sensor 5 records directly is presented on temp controlled meter 32, the relay output interface of temp controlled meter 32 is connected with the power end of controller 18, is controlled the break-make of controller 18 power supply by temp controlled meter 32.
Described microwave excitation Desorption And Seepage of Coalbed Methane experimental provision, comprise three axle pressue device and microwave generating apparatus, three axle pressue devices 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 cavity 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 madial wall close contact of lower cover 11, and piston 9 can along on the madial wall of lower cover 11, lower movement, piston 9 lower cover 11 madial 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 sensor 5, madial wall bottom cylindrical shell 12 above baffle plate 10 is provided with antenna holder 13, antenna holder 13 madial 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 admission hole 161 in the inside of seaming chuck 16 and seaming chuck first projection 162, waveguide 7, resonator cavity 1, magnetron 2 and controller 18 is had in cylindrical shell 12 outer setting, resonator cavity 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 output power 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 sensor 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 sensor 5, is convenient to temperature sensor 5 and microwave heating temperature is detected in time.
The temperature-sensitive part of described temperature sensor 5 is t type thermopair, and t type thermopair 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 madial 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 gland nut 3, gland 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 gland nut 3.
The model of described magnetron 2 is 2M219K.
Described first pressure regulator valve 22 is arranged between methane gas cylinder 21 and Pore Pressure tensimeter 23.
Described second pressure regulator valve 26 is arranged between multiway valve 25 and confined pressure tensimeter 27.
Described 3rd pressure regulator valve 28 is arranged between multiway valve 25 and axial compression tensimeter 29.
Utilize microwave to improve a method for coal-seam gas desorption efficiency, adopt the device utilizing microwave to improve coal-seam gas desorption efficiency, comprise the steps:
Step one: carry out adsorption experiment;
Open the valve that multiway valve 25 is connected with first, second branch road, adjustment the 3rd pressure regulator valve 28, applies the original pressure of 2Mpa, thus applies initial axial compression to coal body 14 to piston 9, and shows now to piston 9 applied pressure value by axial compression tensimeter 29; Adjust the second pressure regulator valve 26 applies 2Mpa initial confined pressure to coal body 14, and show now to the confined pressure force value that coal body 14 applies by confined pressure tensimeter 27; Adjust the first pressure regulator valve 22 applies 0.5Mpa initial apertures gap pressure to coal body 14, passing hole gap pressure tensimeter 23 shows now to the Pore Pressure force value that coal body 14 applies, keep more than 12 hours after Pore Pressure force value is stable, coal body 14 is fully adsorbed the methane gas under this pressure condition, absorption source of the gas is provided for carrying out microwave excitation desorption experiment, connect temp controlled meter 32 power supply, record coal body 14 internal temperature values now recorded by temperature sensor 5;
Step 2: carry out microwave excitation desorption experiment;
Closedown first, second, third pressure regulator valve after adsorption experiment completes, the initial temperature value of setting temp controlled meter 32 is 20 DEG C, namely when the temperature of temp controlled meter 32 reaches 20 DEG C, temp controlled meter 32 automatic cutting controller 18 power supply, the output power of setting controller 18 is 200W, the microwave power initial value that magnetron 2 exports is identical with the output power value of controller 18, connect controller 18 power supply, magnetron 2 is started working and produced frequency is the microwave of 2450MHz, microwave is by importing in waveguide 23 after resonator cavity 1 adjustment direction, microwave energy transfer is given the end portion of rectilinear microwave antenna 6 by waveguide 23, import in cylindrical shell 12 after the end portion change microwave mode of microwave antenna 6, the electromagnetic field of high frequency change is formed around the spiral part of microwave antenna 6, microwave penetration coal body 14 surface, in coal body 14 inside, medium molecule is encouraged, coal body 14 produces heat energy from inside, by heat conducting effect, coal body 14 entirety is heated, the heat of coal body 14 inside increases, temperature raises, the temperature value that the temperature sensor 5 measuring coal body 14 internal temperature is transferred to temp controlled meter 32 also increases, when the temperature value of temp controlled meter 32 reaches 20 DEG C, temp controlled meter 32 cutting-off controlling device 18 power supply, controller 18 controls magnetron 2 and quits work, magnetron 2 no longer produces microwave, the time of record microwave excitation coal body 14, coal body 14 internal temperature reduces gradually, when temperature sensor 5 record temperature be less than 20 DEG C time, temp controlled meter 32 connects controller 18 power supply, controller 18 controls magnetron 2 and works on according to 200W output power, the microwave that magnetron 2 produces acts on coal body 14 by microwave antenna 6 again, coal body 14 temperature raises gradually, so repeatedly coal body 14 internal temperature can be reached the initial temperature value 20 DEG C of temp controlled meter 32, and keep constant, Open valve 30, by the methane gas volume exported in flowmeter 31 record unit time, until export without gas, desorption process terminates, and closes first, second, third pressure regulator valve and valve 30, closes the power supply of temp controlled meter 32, controller 18 and magnetron 2,
Step 3: repeat step one, two, and the output power of setting controller 18 is 400W during the course;
Step 4: repeat step one, two, and be 1.0Mpa by adjustment first pressure regulator valve 22 setting hole gap pressure force value during the course, the output power of setting controller 18 is 400W, identical with the output power of the controller 18 in step 3;
Step 5: repeat step one, two, and set confined pressure force value respectively and axial compression force value is 4Mpa by second, third pressure regulator valve of adjustment during the course, the output power of setting controller 18 is 400W, identical with the output power of the controller 18 in step 3 or four, setting hole gap pressure force value is 1.0Mpa, identical with the Pore Pressure force value in step 4.
The impermeability utilizing microwave to improve the device of coal-seam gas desorption efficiency was checked before carrying out described step one.
The model of Jun Shi Shanxi Chuangwei Technology Co., Ltd. that described Pore Pressure tensimeter 23, confined pressure tensimeter 27 and axial compression tensimeter 29 adopt is the precision digital tensimeter of CWY100.
The model of what described temp controlled meter 32 adopted is Chuanjiang River Electrical Appliances Co., Ltd is the intelligent PID temp controlled meter of REX-C100.
Claims (6)
1. utilize microwave to improve a device for coal-seam gas desorption efficiency, it is characterized in that comprising microwave excitation Desorption And Seepage of Coalbed Methane experimental provision and coal petrography three axle pressurized adsorbent desorption system, coal petrography three axle pressurized adsorbent desorption system by first, second, third pressure regulator valve, methane gas cylinder, add carrier gas bottle, confined pressure tensimeter, axial compression tensimeter, Pore Pressure tensimeter, valve, flow take into account temp controlled meter and form, the seaming chuck air admission hole of microwave excitation Desorption And Seepage of Coalbed Methane experimental provision is connected with methane gas cylinder, is provided with the first pressure regulator valve and Pore Pressure tensimeter between seaming chuck air admission hole and methane gas cylinder, add carrier gas bottle to be connected with multiway valve, multiway valve is connected with first, second branch road, and the first branch road is connected with the upper press cover through hole of microwave excitation Desorption And Seepage of Coalbed Methane experimental provision, is provided with the second pressure regulator valve and confined pressure tensimeter on the first leg, second branch road is connected with the lower cover through hole of microwave excitation Desorption And Seepage of Coalbed Methane experimental provision, and the second branch road is provided with the 3rd pressure regulator valve and axial compression tensimeter, the push-down head venthole of microwave excitation Desorption And Seepage of Coalbed Methane experimental provision is connected with one end of flow branch road, and flow branch road is provided with valve and flowmeter, the temperature sensor of microwave excitation Desorption And Seepage of Coalbed Methane experimental provision is connected with temp controlled meter, and temp controlled meter is connected with the controller of microwave excitation Desorption And Seepage of Coalbed Methane experimental provision, described microwave excitation Desorption And Seepage of Coalbed Methane experimental provision, comprise three axle pressue device and microwave generating apparatus, three axle pressue devices 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 cavity, 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 madial 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 sensor is provided with in push-down head through hole, cylindrical shell madial 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 admission hole, have waveguide, resonator cavity, magnetron and controller in cylindrical shell outer setting, one end of resonator cavity 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 sensor is arranged on the inside of coal body.
2. the device utilizing microwave to improve coal-seam gas desorption efficiency according to claim 1, is characterized in that described first pressure regulator valve is arranged between methane gas cylinder and Pore Pressure tensimeter.
3. the device utilizing microwave to improve coal-seam gas desorption efficiency according to claim 1, is characterized in that described second pressure regulator valve is arranged between multiway valve and confined pressure tensimeter.
4. the device utilizing microwave to improve coal-seam gas desorption efficiency according to claim 1, is characterized in that described 3rd pressure regulator valve is arranged between multiway valve and axial compression tensimeter.
5. utilize microwave to improve a method for coal-seam gas desorption efficiency, it is characterized in that adopting the device utilizing microwave to improve coal-seam gas desorption efficiency according to claim 1, comprise the steps:
Step one: carry out adsorption experiment;
Open the valve that multiway valve is connected with first, second branch road, adjust the 3rd pressure regulator valve and apply initial axial compression to coal body, adjust the second pressure regulator valve and apply initial confined pressure to coal body, adjust the first pressure regulator valve, apply initial apertures gap pressure to coal body, keep more than 12 hours after Pore Pressure force value is stable, coal body is fully adsorbed methane gas, connect temp controlled meter power supply, record the coal body internal temperature values now recorded by temperature sensor;
Step 2: carry out microwave excitation desorption experiment;
Close first, second, third pressure regulator valve, the initial temperature value of setting temp controlled meter, namely when Human liver glutathione is to initial temperature value, temp controlled meter automatic cutting controller power supply; The output power of setting controller, connect controller power source, when the temperature value of coal body inside reaches the initial temperature value of temp controlled meter, Open valve, by the methane gas volume exported in the cmf record unit interval, until export without gas, desorption process terminates, close first, second, third pressure regulator valve and valve, close the power supply of temp controlled meter, controller and magnetron;
Step 3: repeat step one, two, and change the output power of controller during the course;
Step 4: repeat step one, two, and change Pore Pressure force value by adjustment first pressure regulator valve during the course, the output power of controller is identical with the output power of the controller in step 3;
Step 5: repeat step one, two, and confined pressure force value and the axial compression force value of coal body is changed during the course respectively by second, third pressure regulator valve of adjustment, the output power of controller is identical with the output power of the controller in step 3 or four, and Pore Pressure force value is identical with the Pore Pressure force value in step 4.
6. the method utilizing microwave to improve coal-seam gas desorption efficiency according to claim 5, is characterized in that before carrying out described step one, check the impermeability utilizing microwave to improve the device of coal-seam gas desorption efficiency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310733795.2A CN103698411B (en) | 2013-12-25 | 2013-12-25 | Device and method for improving coal bed gas desorption efficiency with microwaves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310733795.2A CN103698411B (en) | 2013-12-25 | 2013-12-25 | Device and method for improving coal bed gas desorption efficiency with microwaves |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103698411A CN103698411A (en) | 2014-04-02 |
| CN103698411B true CN103698411B (en) | 2015-06-17 |
Family
ID=50360010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310733795.2A Expired - Fee Related CN103698411B (en) | 2013-12-25 | 2013-12-25 | Device and method for improving coal bed gas desorption efficiency with microwaves |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103698411B (en) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104181283B (en) * | 2014-09-05 | 2016-06-01 | 河南理工大学 | Measuring method and device is gone out by radon air elutriation in load coal rupture process |
| CN105241784A (en) * | 2015-10-10 | 2016-01-13 | 中国地质大学（武汉） | Shale gas desorption canister capable of regulation and control of desorption temperature and pressure |
| 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 |
| 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 |
| CN107401395B (en) * | 2017-09-05 | 2019-05-24 | 西安科技大学 | The device and method that the methane gas in working seam is desorbed using ultrasonic principle |
| CN107576763B (en) * | 2017-10-13 | 2023-11-28 | 辽宁工程技术大学 | By means of ultrasound and high-temperature CO 2 Experimental device and method for promoting coal bed gas extraction |
| CN108120656B (en) * | 2017-12-20 | 2020-05-12 | 辽宁工程技术大学 | System and method for measuring temperature and heat in coal bed gas adsorption and desorption processes |
| CN108252670B (en) * | 2017-12-27 | 2021-09-24 | 陕西理工大学 | Harmonic wave generating device |
| CN110068520A (en) * | 2018-01-23 | 2019-07-30 | 河南理工大学 | Coal petrography desorption of mash gas experimental system and method under a kind of microwave field action |
| CN110793980B (en) * | 2019-11-14 | 2020-12-04 | 中国矿业大学 | Composite feed-in type microwave reinforced unconventional natural gas desorption test device and test method |
| CN110793899A (en) * | 2019-11-14 | 2020-02-14 | 中国矿业大学 | Multi-phase medium seepage test device and test method under microwave excitation |
| 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 |
| 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 |
| CN112504932B (en) * | 2020-11-18 | 2023-08-04 | 河南理工大学 | Mechanical wave vibration excitation coal permeability increasing experimental device and experimental method thereof |
| CN114687721B (en) * | 2022-03-15 | 2022-12-20 | 中南大学 | Microwave degassing method for coal bed of high-gas mine |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4964734A (en) * | 1988-05-10 | 1990-10-23 | Chubu Electric Power Company Inc. | Moisture content measuring system |
| CN2788175Y (en) * | 2005-04-22 | 2006-06-14 | 辽宁工程技术大学 | Auto pressure type tri-axial permeameter |
| CN201501841U (en) * | 2009-09-22 | 2010-06-09 | 西安建筑科技大学 | Batch type microwave low-temperature destructive distillation device |
| CN202560194U (en) * | 2011-08-12 | 2012-11-28 | 中国石油天然气股份有限公司 | Simulation experiment system exploiting oil gas by heating underground oil shale through microwaves |
| CN102925234A (en) * | 2012-10-19 | 2013-02-13 | 太原理工大学 | Coal seam gas deoxidizing device for heating coal gangue by microwaves |
| CN103114871A (en) * | 2013-03-04 | 2013-05-22 | 刘永杰 | Extraction device and method utilizing microwave coal heating layer |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09176656A (en) * | 1995-12-27 | 1997-07-08 | Kawasaki Steel Corp | Coal heater using microwave |
-
2013
- 2013-12-25 CN CN201310733795.2A patent/CN103698411B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4964734A (en) * | 1988-05-10 | 1990-10-23 | Chubu Electric Power Company Inc. | Moisture content measuring system |
| CN2788175Y (en) * | 2005-04-22 | 2006-06-14 | 辽宁工程技术大学 | Auto pressure type tri-axial permeameter |
| CN201501841U (en) * | 2009-09-22 | 2010-06-09 | 西安建筑科技大学 | Batch type microwave low-temperature destructive distillation device |
| CN202560194U (en) * | 2011-08-12 | 2012-11-28 | 中国石油天然气股份有限公司 | Simulation experiment system exploiting oil gas by heating underground oil shale through microwaves |
| CN102925234A (en) * | 2012-10-19 | 2013-02-13 | 太原理工大学 | Coal seam gas deoxidizing device for heating coal gangue by microwaves |
| CN103114871A (en) * | 2013-03-04 | 2013-05-22 | 刘永杰 | Extraction device and method utilizing microwave coal heating layer |
Non-Patent Citations (3)
| Title |
|---|
| Sorption-induced swelling/shrinkage and permeability of coal under stressed adsorption/desorption conditions;G.X. Wang 等;《International Journal of Coal Geology》;20101231;第83卷;全文 * |
| 低渗透煤层煤层气注热增产激励的研究;杨新乐;《中国博士学位论文全文库》;20111115(第11期);第33-41页 * |
| 微波场中低变质煤与油页岩的热解;宋永新 等;《微波转化》;20120430;第35卷(第2期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103698411A (en) | 2014-04-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103698411B (en) | Device and method for improving coal bed gas desorption efficiency with microwaves | |
| CN103696746B (en) | A kind of microwave excitation Desorption And Seepage of Coalbed Methane experimental facilities | |
| CN102587874B (en) | Experimental device and experimental method for hydrothermal catalytic pyrolysis in heavy oil layer by means of ultrasonic wave | |
| CN105738578B (en) | Microwave encourages coal petrography gas adsorption-desorption characteristics experimental provision and method | |
| CN102680373B (en) | Double-purpose vapor and electric-heating three-shaft desorption and permeation test device | |
| CN115370335B (en) | Hydrate enhanced mining experiment system and method with self-heating assisted depressurization | |
| CN102539280B (en) | Temperature increasing and pressurizing foam cement slurry density testing device | |
| CN204552720U (en) | A kind of compact reservoir microcrack expansion and reservoir firing equipment | |
| CN202599795U (en) | Triaxial desorption and penetration experiment device for steaming and electrical heating | |
| CN102518409A (en) | Method and device for improving yield of coal bed methane by use of ultrasonic wave | |
| CN104568699A (en) | Method for measuring filtration coefficient of supercritical carbon dioxide fracturing fluid | |
| CN104535724A (en) | Device and method for measuring leakoff coefficient of supercritical carbon dioxide fracturing fluid | |
| CN104847322A (en) | Method for improving recovery efficiency for deep common thickened oil water drive-converting into-steam flooding | |
| CN203626782U (en) | Microwave excitation coalbed methane desorption seepage experimental device | |
| CN114894832A (en) | Shale oil CO injection 2 Experimental device and method for evaluating electromagnetic heating auxiliary energy increasing and yield increasing effects | |
| CN105241783A (en) | Coal-series shale gas absorption/desorption percolation experiment device | |
| CN105649589A (en) | Experimental device and method for extracting natural gas hydrates by integrating solar energy and ultrasonic cavitation | |
| CN203265251U (en) | Radio frequency heating vapor phase extraction repair testing device for benzene contaminated soil | |
| CN202161973U (en) | Novel diamond synthesis block | |
| CN206429313U (en) | The heat abstractor of Stirling engine | |
| CN204186367U (en) | A kind of device utilizing microwave technology exploitation of gas hydrate | |
| CN202202852U (en) | Carbon dioxide ground injecting system | |
| CN110836834A (en) | Experimental device and method for promoting decomposition of coal bed gas by microwave directional radiation | |
| CN203991962U (en) | Essence impact machine intelligence locked mode resetting means | |
| CN114687721B (en) | Microwave degassing method for coal bed of high-gas mine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150617 Termination date: 20151225 |
|
| EXPY | Termination of patent right or utility model |