CN105738578A - Microwave radiation excited coal-rock gas adsorption and desorption characteristic experiment device and method - Google Patents
Microwave radiation excited coal-rock gas adsorption and desorption characteristic experiment device and method Download PDFInfo
- Publication number
- CN105738578A CN105738578A CN201610220754.7A CN201610220754A CN105738578A CN 105738578 A CN105738578 A CN 105738578A CN 201610220754 A CN201610220754 A CN 201610220754A CN 105738578 A CN105738578 A CN 105738578A
- Authority
- CN
- China
- Prior art keywords
- desorption
- bottle
- adsorption
- quartz glass
- gas
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
Abstract
The invention discloses a microwave radiation excited coal-rock gas adsorption and desorption characteristic experiment device and method.The device comprises a quartz glass adsorption and desorption bottle, a microwave oven, a high-pressure gas storage tank and a gas collection measuring cylinder.The quartz glass adsorption and desorption bottle is placed in the microwave oven, and a coal-rock sample is contained in a bottle body.A gas inlet of the quartz glass adsorption and desorption bottle is divided into three paths which are connected with the high-pressure gas storage tank, the gas collection measuring cylinder and a vacuum pump respectively.The temperature sensing end of a thermocouple is inserted in the bottle body of the quartz glass adsorption and desorption bottle, the thermocouple is connected with a temperature number display regulator through a data transmission line, and the temperature number display regulator is connected with an alternating current contactor.According to the method, the microwave oven is used for heating the coal-rock sample directly, and the adsorption and desorption law of coal-rock gas under the excitation effect of microwave radiation is analyzed by comparing a conventional desorption experiment with a microwave radiation excited desorption experiment.The structure is simple, and operation is easy and convenient; due to the fact that the microwave oven is used for heating the coal-rock sample directly, the heating effect is obvious, the experiment sensitivity is high, the sealing effect of the device in the experiment process is good, microwaves will not be leaked, and no potential safety hazard exists.
Description
Technical field
The present invention relates to the experimental provision of a kind of coal petrography gas adsorption-desorption characteristics, particularly relate to a kind of experimental provision utilizing microwave radiation excitation coal petrography gas adsorption-desorption characteristics and method.
Background technology
Low extraction rate is always up restriction unconventional gas resource exploitation and the difficult problem utilized, and main cause has following two aspect, and one is the poor permeability of China's coal petrography gas reservoir, and permeability is generally on the low side, most of lower than 0.1mD, low 2～4 orders of magnitude than the U.S.；Two be coal bed gas up to 90% and 60% shale gas be present in coal petrography gas reservoir with adsorbed state, its desorption rate is slow.
For improving extraction efficiency, people propose the non-mechanics methods such as mechanics method and the gas injection displacement of the enhanced gas extraction methods such as intensive drilling-draining, fracturing, deep hole blasting, hydraulic flushing in hole, hydraulic slotted liner technique in succession.In recent years, many scholars are had again to begin attempt to be changed adsorption-desorption and the permeability of coal petrography gas by physical fields such as additional temperature field, earth electric field, low frequency electromagnetic field and sound fields, find by studying, although the effect that coal and rock is produced by above-mentioned several physical field there are differences, but the impact of coal and rock is substantially consistent, namely there is effect to a certain extent that promote coal petrography gas desorbing, migration.
Microwave electromagnetic field is also a kind of physical field, due to microwave there is frequency height, the feature that other electromagnetic waves do not have such as wavelength is short, penetrance is strong and be referred to as a kind of special electromagnetic wave.Microwave is as a kind of frequency electromagnetic waves, and it acts on coal and rock and produces Electromagnetic Environmental Effect on the one hand, and the heat effect simultaneously produced can make the temperature of coal and rock quickly raise, say, that microwave radiation coal and rock is equivalent to coal and rock is applied with simultaneously electromagnetic field and temperature field.Temperature field and low frequency electromagnetic field reduce coal petrography gas adsorbance all to a certain extent, promote desorbing.If thus it is inferred that coal and rock to be applied electromagnetic field and higher temperature field simultaneously, then under both physical field dual functioies, coal and rock desorption properties very likely increases.Therefore, microwave electromagnetic field is acted on coal and rock and most likely promotes coal petrography gas desorbing, but there is presently no research report in this respect.
For the impact on coal petrography gas adsorption-desorption characteristics of the clear and definite microwave radiation, it is necessary to carry out adsorption and desorption experiment.Due to the complexity that microwave produces, transmits, loads, it is impossible to use existing adsorption/desorption experimental apparatus to be made directly experimentation.
In the prior art, CN103696746A discloses a kind of microwave excitation Desorption And Seepage of Coalbed Methane experimental provision, the microwave that magnetron produces is used to import waveguide after changing direction by resonator cavity, waveguide changes transmission parameter by microwave antenna termination and is transferred to helical form microwave antenna, helical form microwave antenna form the action of a magnetic field of high frequency change in coal body.Microwave antenna is generally used for signal communication, and its heat effect is generally inconspicuous.In this device, microwave equipment is assembling equipment, and the airtight meeting of equipment exists hidden danger, and microwave is easily revealed, and is easily generated safety problem, and this device is complex, seals difficulty, not easily realizes in reality.
Summary of the invention
It is an object of the invention to overcome deficiency of the prior art to provide experimental provision and the method for a kind of microwave radiation excitation coal petrography gas adsorption-desorption characteristics, the method and apparatus structure are simple, it is easily achieved, easy and simple to handle, safety is good, can realize microwave radiation is encouraged the test of coal petrography gas adsorption-desorption characteristics.
Technical scheme: the experimental provision of a kind of microwave radiation excitation coal petrography gas adsorption-desorption characteristics, including quartz glass adsorption-desorption bottle, microwave oven, high pressure tank and gas collection measuring cylinder, described quartz glass adsorption-desorption bottle is placed in microwave oven, bottle is built with coal petrography sample, quartz glass adsorption-desorption bottle air inlet divide three tunnels respectively with high pressure tank, gas collection measuring cylinder and vacuum pump connect, high pressure tank supply air line is provided with air relief valve, gas flowmeter, Pressure gauge and stop valve one, gas collection measuring cylinder blowdown piping is provided with stop valve two, vacuum pump exhaust pipe is provided with vacuum and takes into account stop valve three；Thermocouple temperature sensitive end is inserted in quartz glass adsorption-desorption bottle bottle, and thermocouple is connected with temperature digital-display adjusting apparatus through data line, and temperature digital-display adjusting apparatus connects A.C. contactor.
Based on technique scheme, described quartz glass adsorption-desorption bottle includes bottle, quartz glass proboscis bottle cap and be arranged on the quartz glass inducing QI tubule of quartz glass adsorption-desorption bottle air inlet, described quartz glass proboscis bottle cap lower end is provided with " U " type proboscis pipe, proboscis pipe is inserted in bottle coal petrography sample, side opening on proboscis pipe, thermocouple temperature sensitive end is inserted in " U " type proboscis pipe, along being provided with annular slot on described quartz glass proboscis bottle cap upper end edge bottle, along fixing in draw-in groove on described bottle.
Based on technique scheme, for preventing thermocouple from " sparking " phenomenon occurring in microwave cavity body, add a filter capacitor at thermocouple tip, and at the place case off that thermocouple contacts with microwave oven furnace wall.
Based on technique scheme, described quartz glass adsorption-desorption bottle bottle thickness guarantees to bear the pressure of 5MPa, and heatproof is not less than 500 DEG C.
A kind of experimental technique utilizing microwave radiation excitation coal petrography gas adsorption-desorption characteristics, the method comprises the following steps:
Step one, prepares sample: gathers after fresh coal petrography sample carries out tightly encapsulation and delivers to laboratory, is pulverized, screens out the coal petrography sample needing particle diameter by fresh coal petrography sample；After the coal petrography sample screened out is dried, it is placed in quartz glass adsorption-desorption bottle；
nullStep 2，Connection: by quartz glass proboscis bottle cap lid to the quartz glass adsorption-desorption bottle containing coal petrography sample，Seal with fluid sealant simultaneously，And by draw-in groove clamping bottle，Quartz glass adsorption-desorption bottle is put in microwave oven，Then quartz glass adsorption-desorption bottle air inlet is divided three tunnels respectively with high pressure tank、Gas collection measuring cylinder and vacuum pump are connected，High pressure tank supply air line is installed air relief valve、Gas flowmeter、Pressure gauge and stop valve one，Gas collection measuring cylinder blowdown piping is installed stop valve two，Vacuum pump exhaust pipe is installed vacuum and takes into account stop valve three，Again thermocouple temperature sensitive end is inserted in quartz glass proboscis bottle cap，By data line, thermocouple is connected with temperature digital-display adjusting apparatus，Then temperature digital-display adjusting apparatus is connected with A.C. contactor，Realize being controlled the switch of microwave oven by temperature；
Step 3: check device air-tightness: use N2Check the air-tightness of device, it is ensured that system connects reliable；
Step 4: vacuum outgas: close stop valve one and stop valve two, opens stop valve three, starts vacuum pump, carry out degassed, observe the vacuometer being connected with vacuum pump, when vacuum pressure is down to setting value, after continuing evacuation 4～6h, close stop valve three, stop degassed；
Step 5: adsorption experiment: after degassed, open stop valve one, open high pressure tank, start to be filled with methane in quartz glass adsorption-desorption bottle bottle, by gas flowmeter record air inflow, according to experimental sequence when pressure of the inside of a bottle reaches setting pressure successively, stop inflation, due to coal petrography sample absorption in bottle, pressure of the inside of a bottle reduces, and continues inflation and makes pressure of the inside of a bottle extremely former setting pressure, such repeatable operation, until continuous 2～4 hours readings of Pressure gauge are constant and coal petrography sample adsorption time is more than 8h, then it is assumed that absorption has reached balance；
Step 6: do the conventional desorption experiment without microwave radiation: after reaching adsorption equilibrium in quartz glass adsorption-desorption bottle, close stop valve one, open stop valve two, start venting, first allow exhaust end connect with air and discharge portion of methane gas free in quartz glass adsorption-desorption bottle, then gas collection measuring cylinder is connected, start to resolve test, when test just starts, read a number at regular intervals, along with the prolongation of the time of parsing after a period of time, gas desorption amount reduces, reading time interval time proper extension, until exporting without gas, desorption process terminates；
Step 7: do microwave radiation excitation desorption experiment: first re-start the adsorption experiment of step 5, stop valve one is closed after adsorption equilibrium, microwave oven plug is inserted supply socket energising, regulate temperature digital-display adjusting apparatus to set point of temperature scope, regulate maximum temperature less than 400 DEG C, be sequentially adjusted in microwave oven to setpoint power output according to experimental sequence, start microwave oven, open stop valve two simultaneously, start venting；First allow exhaust end connect with air and discharge portion of methane gas free in quartz glass adsorption-desorption bottle, then gas collection measuring cylinder is connected, start to resolve test, when mensuration just starts, read a number at regular intervals, along with the prolongation of the time of parsing after a period of time, gas desorption amount reduces, reading time interval time proper extension, until exporting without gas, desorption process terminates, and records the change of temperature simultaneously；
Step 8: experiment terminates: close microwave oven, cut off the electricity supply, closes high pressure tank total valve；
Step 9: interpretation and analysis: according to desorption experiment data, obtains desorption quantity and desorption rate in experimentation, with the attached adsorption law of coal petrography aspiration under conventional desorption experiment relative analysis microwave radiation incentive action.
Beneficial effects of the present invention: the experimental provision simple in construction of microwave radiation of the present invention excitation coal petrography gas adsorption-desorption characteristics, easy and simple to handle, microwave oven is utilized directly coal petrography sample to be heated, heats is obvious, and experiment sensitivity is high, and contrast experiment's effect is obvious, in experimentation, device seals simply, easily operates, good sealing effect, microwave will not be revealed, and is absent from potential safety hazard.It is compact, reasonable that each link of experimental technique of the present invention is arranged, by normal experiment and microwave radiation excitation desorption experiment contrast, gem-pure can draw the attached adsorption law of coal petrography aspiration under microwave radiation incentive action, experimental accuracy is high, workable, can accurately realize microwave radiation is encouraged the test of coal petrography gas adsorption-desorption characteristics.
Figure of description
Fig. 1 is the experimental provision structural representation of microwave radiation of the present invention excitation coal petrography gas adsorption-desorption characteristics；
Fig. 2 is quartz glass adsorption-desorption bottle structure schematic diagram in Fig. 1；
Fig. 3 is that to balance pressure be desorption process line analysis schematic diagram during 2MPa to the embodiment of the present invention 1.
Number in the figure, 1 is quartz glass adsorption-desorption bottle, and 1-1 is quartz glass adsorption-desorption bottle bottle, and 1-2 is quartz glass proboscis bottle cap, and 1-3 is quartz glass inducing QI tubule, and 1-4 is draw-in groove, and 1-5 is proboscis pipe；2 is high pressure tank, and 3 is microwave oven, and 4 is water tank, and 5 is gas collection measuring cylinder；6 is temperature digital-display adjusting apparatus, and 7 is A.C. contactor, and 8 is plug, and 9 is vacuum pump, and 10 is vacuometer；11 is air relief valve, and 12 is gas flowmeter, and 13 is Pressure gauge, and 14 is thermocouple, and 15 is filter capacitor；16 is stop valve one, and 17 is stop valve two, and 18 is stop valve three.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the present invention will be further described, in order to is better understood from technical solution of the present invention.
Embodiment 1: the experimental provision of a kind of microwave radiation excitation coal petrography gas adsorption-desorption characteristics, referring to Fig. 1, including quartz glass adsorption-desorption bottle 1, microwave oven 3, high pressure tank 2 and gas collection measuring cylinder 5, as shown in Figure 2, described quartz glass adsorption-desorption bottle includes bottle 1-1, quartz glass proboscis bottle cap 1-2 and be arranged on the quartz glass inducing QI tubule 1-3 of quartz glass adsorption-desorption bottle air inlet, described quartz glass proboscis bottle cap lower end is provided with " U " type proboscis pipe 1-5, proboscis pipe is inserted in bottle coal petrography sample, side opening on proboscis pipe, along being provided with annular slot 1-4 on described quartz glass proboscis bottle cap upper end edge bottle, along fixing in draw-in groove 1-4 on described bottle.Proboscis bottle cap is by, after draw-in groove clamping bottle, sealing with fluid sealant, and proboscis bottle cap sealing bottle is simple to operate, good sealing effect.Quartz glass adsorption-desorption bottle all adopts quartz glass to make, and the thickness of quartz glass to guarantee to bear the pressure of 5MPa, and heatproof is not less than 500 DEG C.
Described quartz glass adsorption-desorption bottle 1 is placed in microwave oven 3, bottle is built with coal petrography sample, quartz glass adsorption-desorption bottle air inlet divides three tunnels to be connected with high pressure tank 2, gas collection measuring cylinder 5 and vacuum pump 9 respectively, high pressure tank 2 supply air line is provided with air relief valve 11, gas flowmeter 12, Pressure gauge 13 and stop valve 1, gas collection measuring cylinder 5 blowdown piping is provided with stop valve 2 17, vacuum pump 9 exhaust pipe is provided with vacuometer 10 and stop valve 3 18；Thermocouple temperature sensitive end 14 is inserted in quartz glass proboscis bottle cap 1-2, thermocouple is connected with temperature digital-display adjusting apparatus 6 through data line, temperature digital-display adjusting apparatus 6 connects A.C. contactor 7, A.C. contactor 7 connects plug 8, realize being controlled the switch of microwave oven by temperature, thermocouple is K type armoured thermocouple, and model is WRNK.For preventing thermocouple from " sparking " phenomenon occurring in microwave cavity body, add a filter capacitor 15 at thermocouple tip, and the place case off contacted with microwave oven furnace wall at thermocouple is to eliminate by the High-frequency Interference of thermocouple induction.
Utilize said apparatus carry out microwave radiation excitation coal petrography gas adsorption-desorption characteristics specific experiment method as follows: (1) prepares sample: gather fresh coal petrography sample carry out tightly encapsulation after deliver to laboratory, fresh coal petrography sample is pulverized, is sieved into required granularity, weigh the coal petrography sample of a certain amount of 1～3mm particle diameter, be placed into after drying in quartz glass adsorption-desorption bottle；
null(2) connection: by quartz glass proboscis bottle cap lid to the quartz glass adsorption-desorption bottle containing coal petrography sample，Seal with fluid sealant simultaneously，And by draw-in groove clamping，Quartz glass adsorption-desorption bottle is put in microwave oven，Then quartz glass adsorption-desorption bottle air inlet is divided three tunnels respectively with high pressure tank、Gas collection measuring cylinder and vacuum pump are connected，High pressure tank supply air line is installed air relief valve、Gas flowmeter、Pressure gauge and stop valve one，Gas collection measuring cylinder blowdown piping is installed stop valve two，Vacuum pump exhaust pipe is installed vacuum and takes into account stop valve three，Again thermocouple temperature sensitive end is inserted in quartz glass proboscis bottle cap，By data line, thermocouple is connected with temperature digital-display adjusting apparatus，Temperature digital-display adjusting apparatus is connected with A.C. contactor，Realize being controlled the switch of microwave oven by temperature，For preventing thermocouple from " sparking " phenomenon occurring in microwave cavity，Thermocouple tip adds a filter capacitor，Eliminate by the High-frequency Interference of thermocouple induction，And the place case off that thermocouple contacts with furnace wall；
(3) device air-tightness is checked: use N2Check the air-tightness of device, it is ensured that system connects reliable；
(4) vacuum outgas: close stop valve one and stop valve two, opens stop valve three, starts vacuum pump, carries out degassed, observes the vacuometer being connected with vacuum pump, when vacuum pressure is down to 0.4Pa, after continuing evacuation 4～6h, closes stop valve three, stops degassed；
(5) adsorption experiment: after degassed, open stop valve one, open high pressure tank, start to be filled with methane, by gas flowmeter record air inflow, (by test sequence when pressure of the inside of a bottle reaches setting pressure, it is followed successively by 0.5MPa, 2MPa, 2.5MPa, 3MPa, 3.5MPa, 4MPa), stopping inflation, owing to sample adsorbs, pressure of the inside of a bottle reduces, continue inflation and make pressure of the inside of a bottle extremely former setting pressure, such repeatable operation, until continuous 3 hours readings of Pressure gauge are constant and adsorption time is more than 8h, then it is assumed that absorption has reached balance；
(6) conventional (without microwave radiation) desorption experiment: after reaching adsorption equilibrium, close stop valve one, open stop valve two, start venting, exhaust end is first allowed to connect 30s with air, discharge portion of methane gas free in quartz glass adsorption-desorption bottle, then connect gas collection measuring cylinder, start coal petrography sample and resolve test, when mensuration just starts, a number is read every 1min, with the prolongation of the time of parsing after 20min, coal petrography sample gas body desorption quantity reduces, reading time interval proper extension, until exporting without gas, desorption process terminates；
null(7) microwave radiation excitation desorption experiment: first re-start step (5) adsorption experiment，Stop valve one is closed after adsorption equilibrium，Microwave oven plug is inserted supply socket energising，Regulate temperature digital-display adjusting apparatus to proper temperature scope，Such as may is that 150～200 DEG C，It is in security consideration，Maximum temperature must not exceed 400 DEG C，Adjust microwave oven to a certain output (by test sequence，It is followed successively by 136W、264W、440W、616W and 800W)，Start microwave oven，Open stop valve two simultaneously，Start venting，Exhaust end is first allowed to connect 30s with air，Discharge portion of methane gas free in quartz glass adsorption-desorption bottle，Then gas collection measuring cylinder is connected，Start coal petrography sample and resolve test，When mensuration just starts，A number is read every 1min，With the prolongation of desorption time after 20min，Gas desorption amount reduces，Reading time interval proper extension，Until exporting without gas，Desorption process terminates，Record the change of temperature simultaneously；
(8) experiment terminates: closes microwave oven, cuts off the electricity supply, and closes high pressure tank total valve；
(9) interpretation and analysis: according to desorption experiment data, can obtain desorption quantity and desorption rate in experimentation, the attached adsorption law of coal petrography aspiration under relative analysis microwave radiation incentive action.
According to experimental data, the present embodiment obtain balance pressure be that desorption process line analysis during 2MPa is as follows, in Fig. 3, figure: zero be routine without microwave radiation when desorption process line, desorption process line when is microwave power 440W, desorption process line when △ is microwave power 800W.As can be seen from Figure 3: it is consistent with the desorption kinetic curve shape of methane in the two kinds of Coal Unders that add microwave radiation to be not added with microwave radiation, the initial desorbing speed of methane, increase in time, and desorption rate is increasingly slower, finally reaches desorbing balance.Under microwave irradiation effect in coal methane desorbing total amount more than methane desorbing total amount when being not added with microwave radiation, along with microwave power increases, methane desorbing total amount also increases, when balance pressure is 2MPa, when microwave irradiation power is 440W, desorbing total amount ratio is not added with microwave radiation desorbing total amount increases by 37%, when microwave irradiation power is 800W, desorbing total amount ratio is not added with microwave radiation desorbing total amount increases by 58%, it is demonstrated experimentally that microwave irradiation effect can promote methane desorbing.
Claims (5)
1. the experimental provision of a microwave radiation excitation coal petrography gas adsorption-desorption characteristics, it is characterized in that: include quartz glass adsorption-desorption bottle, microwave oven, high pressure tank and gas collection measuring cylinder, described quartz glass adsorption-desorption bottle is placed in microwave oven, bottle is built with coal petrography sample, quartz glass adsorption-desorption bottle air inlet divide three tunnels respectively with high pressure tank, gas collection measuring cylinder and vacuum pump connect, high pressure tank supply air line is provided with air relief valve, gas flowmeter, Pressure gauge and stop valve one, gas collection measuring cylinder blowdown piping is provided with stop valve two, vacuum pump exhaust pipe is provided with vacuum and takes into account stop valve three；Thermocouple temperature sensitive end is inserted in quartz glass adsorption-desorption bottle bottle, and thermocouple is connected with temperature digital-display adjusting apparatus through data line, and temperature digital-display adjusting apparatus connects A.C. contactor.
2. the experimental provision of microwave radiation according to claim 1 excitation coal petrography gas adsorption-desorption characteristics, it is characterized in that: described quartz glass adsorption-desorption bottle includes bottle, quartz glass proboscis bottle cap and be arranged on the quartz glass inducing QI tubule of quartz glass adsorption-desorption bottle air inlet, described quartz glass proboscis bottle cap lower end is provided with " U " type proboscis pipe, proboscis pipe is inserted in bottle coal petrography sample, side opening on proboscis pipe, thermocouple temperature sensitive end is inserted in " U " type proboscis pipe, along being provided with annular slot on described quartz glass proboscis bottle cap upper end edge bottle, along fixing in draw-in groove on described bottle.
3. the experimental provision of microwave radiation according to claim 1 excitation coal petrography gas adsorption-desorption characteristics, is characterized in that: add a filter capacitor at thermocouple tip.
4. the experimental provision of microwave radiation according to claim 1 excitation coal petrography gas adsorption-desorption characteristics, is characterized in that: described quartz glass adsorption-desorption bottle bottle thickness guarantees to bear the pressure of 5MPa, and heatproof is not less than 500 DEG C.
5. utilize an experimental technique for the microwave radiation excitation coal petrography gas adsorption-desorption characteristics of experimental provision as claimed in claim 1, it is characterized in that: the method comprises the following steps:
Step one, prepares sample: gathers after fresh coal petrography sample carries out tightly encapsulation and delivers to laboratory, is pulverized, screens out the coal petrography sample needing particle diameter by fresh coal petrography sample；After the coal petrography sample screened out is dried, it is placed in quartz glass adsorption-desorption bottle；
nullStep 2，Connection: by quartz glass proboscis bottle cap lid to the quartz glass adsorption-desorption bottle containing coal petrography sample，Seal with fluid sealant simultaneously，And by draw-in groove clamping bottle，Quartz glass adsorption-desorption bottle is put in microwave oven，Then quartz glass adsorption-desorption bottle air inlet is divided three tunnels respectively with high pressure tank、Gas collection measuring cylinder and vacuum pump are connected，High pressure tank supply air line is installed air relief valve、Gas flowmeter、Pressure gauge and stop valve one，Gas collection measuring cylinder blowdown piping is installed stop valve two，Vacuum pump exhaust pipe is installed vacuum and takes into account stop valve three，Again thermocouple temperature sensitive end is inserted in quartz glass proboscis bottle cap，By data line, thermocouple is connected with temperature digital-display adjusting apparatus，Then temperature digital-display adjusting apparatus is connected with A.C. contactor，Realize being controlled the switch of microwave oven by temperature；
Step 3: check device air-tightness: use N2Check the air-tightness of device, it is ensured that system connects reliable；
Step 4: vacuum outgas: close stop valve one and stop valve two, opens stop valve three, starts vacuum pump, carry out degassed, observe the vacuometer being connected with vacuum pump, when vacuum pressure is down to setting value, after continuing evacuation 4～6h, close stop valve three, stop degassed；
Step 5: adsorption experiment: after degassed, open stop valve one, open high pressure tank, start to be filled with methane in quartz glass adsorption-desorption bottle bottle, by gas flowmeter record air inflow, according to experimental sequence when pressure of the inside of a bottle reaches setting pressure successively, stop inflation, due to coal petrography sample absorption in bottle, pressure of the inside of a bottle reduces, and continues inflation and makes pressure of the inside of a bottle extremely former setting pressure, such repeatable operation, until continuous 2～4 hours readings of Pressure gauge are constant and coal petrography sample adsorption time is more than 8h, then it is assumed that absorption has reached balance；
Step 6: do the conventional desorption experiment without microwave radiation: after reaching adsorption equilibrium in quartz glass adsorption-desorption bottle, close stop valve one, open stop valve two, start venting, first allow exhaust end connect with air and discharge portion of methane gas free in quartz glass adsorption-desorption bottle, then gas collection measuring cylinder is connected, start to resolve test, when test just starts, read a number at regular intervals, along with the prolongation of the time of parsing after a period of time, gas desorption amount reduces, reading time interval time proper extension, until exporting without gas, desorption process terminates；
Step 7: do microwave radiation excitation desorption experiment: first re-start the adsorption experiment of step 5, stop valve one is closed after adsorption equilibrium, microwave oven plug is inserted supply socket energising, regulate temperature digital-display adjusting apparatus to set point of temperature scope, regulate maximum temperature less than 400 DEG C, be sequentially adjusted in microwave oven to setpoint power output according to experimental sequence, start microwave oven, open stop valve two simultaneously, start venting；First allow exhaust end connect with air and discharge portion of methane gas free in quartz glass adsorption-desorption bottle, then gas collection measuring cylinder is connected, start to resolve test, when mensuration just starts, read a number at regular intervals, along with the prolongation of the time of parsing after a period of time, gas desorption amount reduces, reading time interval time proper extension, until exporting without gas, desorption process terminates, and records the change of temperature simultaneously；
Step 8: experiment terminates: close microwave oven, cut off the electricity supply, closes high pressure tank total valve；
Step 9: interpretation and analysis: according to desorption experiment data, obtains desorption quantity and desorption rate in experimentation, with the attached adsorption law of coal petrography aspiration under conventional desorption experiment relative analysis microwave radiation incentive action.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610220754.7A CN105738578B (en) | 2016-04-11 | 2016-04-11 | Microwave encourages coal petrography gas adsorption-desorption characteristics experimental provision and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610220754.7A CN105738578B (en) | 2016-04-11 | 2016-04-11 | Microwave encourages coal petrography gas adsorption-desorption characteristics experimental provision and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105738578A true CN105738578A (en) | 2016-07-06 |
| CN105738578B CN105738578B (en) | 2017-06-23 |
Family
ID=56253102
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610220754.7A Expired - Fee Related CN105738578B (en) | 2016-04-11 | 2016-04-11 | Microwave encourages coal petrography gas adsorption-desorption characteristics experimental provision and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105738578B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108593494A (en) * | 2018-05-14 | 2018-09-28 | 华北科技学院 | A kind of experimental method and device promoting desorption of mash gas using external rotary magnetic field |
| CN108825197A (en) * | 2018-06-19 | 2018-11-16 | 昆明理工大学 | A method of strengthening shale gas recovery ratio |
| CN109839345A (en) * | 2019-04-02 | 2019-06-04 | 贵州大学 | A kind of isothermal adsorption experimental rig and test method changing test gas temperature |
| CN110031601A (en) * | 2019-04-08 | 2019-07-19 | 太原理工大学 | A kind of coal gas adsorption-desorption performance testing 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 |
| CN110160911A (en) * | 2019-07-04 | 2019-08-23 | 贵州大学 | A kind of isothermal adsorption device and operating method with magnetic field |
| CN110793980A (en) * | 2019-11-14 | 2020-02-14 | 中国矿业大学 | Composite feed-in type microwave reinforced unconventional natural gas desorption test device and test method |
| CN113094955A (en) * | 2021-04-12 | 2021-07-09 | 兰州交通大学 | Microwave heating simulation analysis method |
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 |
| CN2688013Y (en) * | 2004-03-29 | 2005-03-23 | 长沙三德实业有限公司 | Infrared heating device |
| CN103698411A (en) * | 2013-12-25 | 2014-04-02 | 辽宁工程技术大学 | Device and method for improving coal bed gas desorption efficiency with microwaves |
| CN103696746A (en) * | 2013-12-25 | 2014-04-02 | 辽宁工程技术大学 | Microwave excitation coal-bed gas desorption and seepage experimental device |
| CN105276639A (en) * | 2015-10-09 | 2016-01-27 | 华南理工大学 | Microwave oven device for pyrolysis and pyrolysis method thereof |
| CN205643286U (en) * | 2016-04-11 | 2016-10-12 | 河南理工大学 | Microwave radiation excitation coal petrography gas adsorbs desorption characteristic test device |
-
2016
- 2016-04-11 CN CN201610220754.7A patent/CN105738578B/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 |
| CN2688013Y (en) * | 2004-03-29 | 2005-03-23 | 长沙三德实业有限公司 | Infrared heating device |
| CN103698411A (en) * | 2013-12-25 | 2014-04-02 | 辽宁工程技术大学 | Device and method for improving coal bed gas desorption efficiency with microwaves |
| CN103696746A (en) * | 2013-12-25 | 2014-04-02 | 辽宁工程技术大学 | Microwave excitation coal-bed gas desorption and seepage experimental device |
| CN105276639A (en) * | 2015-10-09 | 2016-01-27 | 华南理工大学 | Microwave oven device for pyrolysis and pyrolysis method thereof |
| CN205643286U (en) * | 2016-04-11 | 2016-10-12 | 河南理工大学 | Microwave radiation excitation coal petrography gas adsorbs desorption characteristic test device |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN108593494A (en) * | 2018-05-14 | 2018-09-28 | 华北科技学院 | A kind of experimental method and device promoting desorption of mash gas using external rotary magnetic field |
| CN108825197A (en) * | 2018-06-19 | 2018-11-16 | 昆明理工大学 | A method of strengthening shale gas recovery ratio |
| CN109839345A (en) * | 2019-04-02 | 2019-06-04 | 贵州大学 | A kind of isothermal adsorption experimental rig and test method changing test gas temperature |
| CN110031601A (en) * | 2019-04-08 | 2019-07-19 | 太原理工大学 | A kind of coal gas adsorption-desorption performance testing device |
| CN110160911A (en) * | 2019-07-04 | 2019-08-23 | 贵州大学 | A kind of isothermal adsorption device and operating method with magnetic field |
| CN110793980A (en) * | 2019-11-14 | 2020-02-14 | 中国矿业大学 | Composite feed-in type microwave reinforced unconventional natural gas desorption test device and test method |
| 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 |
| CN113094955A (en) * | 2021-04-12 | 2021-07-09 | 兰州交通大学 | Microwave heating simulation analysis method |
| CN113094955B (en) * | 2021-04-12 | 2023-02-24 | 兰州交通大学 | Microwave heating simulation analysis method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105738578B (en) | 2017-06-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105738578A (en) | Microwave radiation excited coal-rock gas adsorption and desorption characteristic experiment device and method | |
| CN104747187B (en) | A kind of high temperature and pressure borehole wall strengthens drilling fluid simulated experimental provision and method | |
| CN110761756B (en) | Water injection huff and puff recovery ratio testing method for low-permeability reservoir considering energy flow | |
| CN105181728B (en) | The method of nuclear magnetic resonance on-line checking shale gas | |
| CN103698411B (en) | Device and method for improving coal bed gas desorption efficiency with microwaves | |
| CN205643286U (en) | Microwave radiation excitation coal petrography gas adsorbs desorption characteristic test device | |
| CN109372499A (en) | A kind of geologic reservoir radial flow simulation system | |
| CN101845946A (en) | Method for simulating polymer solution shear and special equipment thereof | |
| CN104297128A (en) | Triaxial stress seepage experiment device under high pressure water and subpressure loading condition | |
| CN102494981A (en) | Device for testing gas seepage and creepage coupling action of rocks | |
| CN109470616B (en) | Multifunctional seepage testing system for rock | |
| US20220003079A1 (en) | Simulation analysis method for injection volume of alternate displacement of shale oil by carbon dioxide and nitrogen | |
| CN203756119U (en) | Sleeve subassembly for simulated cementation test | |
| CN202451142U (en) | Subsurface environment simulator | |
| CN110206516A (en) | A kind of simulation fault block oil reservoir regulation note adopts experimental provision and method | |
| CN114354809B (en) | Experimental system and experimental evaluation method for replacing methane by carbon dioxide pulse displacement | |
| CN109557252A (en) | A kind of comprehensive hydrate simulation system | |
| CN106482924A (en) | Rock hydrocarbon simulated flowing apparatus | |
| CN107560972A (en) | Coal adsorption-desorption Experiment of Methane device and method under ul-trasonic irradiation | |
| CN115263286A (en) | Horizontal well post-fracturing stewing-discharging-producing integrated physical simulation device and method | |
| CN106370524B (en) | The method and verifying device of a kind of limit injection pressure of determination along interlayer the second cement plane channelling | |
| CN107560993A (en) | Coal-bed methane seepage experimental provision and method under ul-trasonic irradiation | |
| CN108798655B (en) | Three-gas combined mining experimental device for coal bed gas loss | |
| CN109991260A (en) | A kind of the thermal simulation collection device and method of the generation of hydrocarbon source rock organic acid | |
| CN209398416U (en) | A kind of geologic reservoir radial flow simulation system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170623 Termination date: 20210411 |