CN102841192A - Desorption analysis experimental facility of coal rock - Google Patents
Desorption analysis experimental facility of coal rock Download PDFInfo
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- CN102841192A CN102841192A CN2012103593264A CN201210359326A CN102841192A CN 102841192 A CN102841192 A CN 102841192A CN 2012103593264 A CN2012103593264 A CN 2012103593264A CN 201210359326 A CN201210359326 A CN 201210359326A CN 102841192 A CN102841192 A CN 102841192A
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- 239000003245 coal Substances 0.000 title claims abstract description 67
- 238000003795 desorption Methods 0.000 title claims abstract description 40
- 239000011435 rock Substances 0.000 title abstract description 10
- 238000004458 analytical method Methods 0.000 title abstract description 8
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 44
- 239000002245 particle Substances 0.000 claims abstract description 40
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 238000006243 chemical reaction Methods 0.000 claims abstract description 26
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 17
- 239000007789 gas Substances 0.000 claims description 41
- 125000004122 cyclic group Chemical group 0.000 claims description 19
- 238000003760 magnetic stirring Methods 0.000 claims description 9
- 238000005259 measurement Methods 0.000 abstract 3
- 239000012224 working solution Substances 0.000 abstract 1
- 239000012530 fluid Substances 0.000 description 11
- 239000007788 liquid Substances 0.000 description 8
- 238000010521 absorption reaction Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 238000011160 research Methods 0.000 description 6
- 238000004088 simulation Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 239000003034 coal gas Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000012113 quantitative test Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000002336 sorption--desorption measurement Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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Abstract
The invention relates to desorption analysis experimental facility of a coal rock. A methane tank, a horizontal pump, an desorption reaction container, a constant-temperature bain marie, a measurement container and a nitrogen tank are respectively connected to a main pipeline; the methane tank is communicated with the main pipeline through a globe valve; a precise electronic scale is also arranged at the side of the measurement container; the nitrogen tank is communicated with the main pipeline through the globe valve; the desorption analysis experimental facility is characterized in that a back-pressure valve is also arranged on the main pipeline at the front end of the measurement container through the globe valve, and the nitrogen tank is communicated with the back-pressure valve through the globe valve. A coal rock particle sample is arranged under the states of circulating water at different temperature, pressure and rotating speeds by the device; the temperature imitates the temperature of the coal rock particle under a stratum; the pressure imitates the pressure state of the coal rock particle under the stratum, and a shear force of the circulating water imitates an impact state of a working solution of the coal rock particle under the stratum, therefore, an emulated coal rock particle morphology is formed in a laboratory, and the collected data is high in accuracy.
Description
Technical field
The invention belongs to the coal petrography analysis field, relate to the coal petrography desorption, especially a kind of coal petrography desorption is analyzed experimental provision.
Background technology
Coal petrography under the stratum also contains adsorbed gas except free gas, this adsorbed gas is contained in the coal petrography particle.Absorption tolerance and ease gas speed through detecting the coal petrography particle can realize gathering and utilizing this energy.Because the coal petrography particle exists with saturated form under bottom basically, but the desorption rate of coal petrography particle under the different pressures condition of different-grain diameter is different with desorption quantity, and different liquids is also different with desorption quantity to the desorption efficiency of coal petrography particle; In addition, also relate to saturated discharge opeing desorption efficiency and the desorption quantity with dry coal appearance of coal gas.Therefore, it is crucial the coal petrography particle being carried out the desorption analysis.
At present; Design of device environment and coal petrography particle that the coal petrography desorb is analyzed differ more at the environment under the stratum; Therefore the real coal petrography particle existence under can't the analogue simulation stratum; Cause the desorption data deviation of coal petrography particle bigger, ease gas speed and desorption quantity that can't quantitative test coal petrography particle adsorbed gas have hindered the progress that science is gathered the coal petrography adsorbed gas.
Through retrieval, find the following publication document relevant with present patent application:
A kind of stand under load coal petrography constant voltage gas adsorption-desorption pilot system and method (CN102419295A) comprise the permanent pneumatic shuttle of gravity, vacuum pump, high pressure gas gas cylinder, constant voltage gas jar, sample pot, the permanent hydraulic means of gravity and wobble pump.Can depress in different external on-load pressure and different Device in Gas the coal sample and carry out following gas absorption and desorption experiment: 1) research is under the different loads effect; Change owing to coal petrography destroys the characterization of adsorption that causes, research absorption constant, adsorbance etc. are with the load change rule; 2) the desorption of mash gas process of the coal containing methane gas rock under the research different bearer situation; 3) adsorption process and the absorption constant of the varigrained coal petrography of research in constant gas pressure environment; 4) the varigrained coal containing methane gas rock of research desorption of mash gas process and rule in different atmospheric pressure environments; 5) the creep mechanical property of research coal containing methane gas rock in gas absorption and resolving.
Through technical Analysis, above-mentioned patent mainly solves the problem of following several respects: 1, the adsorption and desorption during the coal petrography stand under load, 2, understand coal and receiving outside, carry the absorption constant that reaches under the different methane pressure, 3, desorb only considers the total amount under the different atmospheric pressure environment.Can not solve the desorption quantity and the desorption rate relation of pilot process and the desorption process under the liquid effects is arranged.Therefore the not influence of account temperature in addition, has more different with present patent application.
Summary of the invention
The objective of the invention is to overcome the weak point of prior art; Provide a kind of coal petrography desorption to analyze experimental provision; But the physical presence state of the coal petrography particle under this device analogue simulation stratum is for adsorbance and the desorption rate of analysing the contained adsorbed gas of coal petrography particle scientifically lays the foundation.
The objective of the invention is to realize through following technical scheme:
A kind of coal petrography desorption is analyzed experimental provision; On main line, connect methane gas tank, constant-flux pump, desorb reaction vessel, thermostatical water bath, measuring vessel, nitrogen pot respectively; Wherein the methane gas tank is communicated with main line through a shutoff valve; The measuring vessel side also is provided with a precise electronic balance; Nitrogen pot is communicated with main line through shutoff valve, it is characterized in that: on the main line of measuring vessel front end, through shutoff valve one check valve is installed also, nitrogen pot is communicated with check valve through shutoff valve.
And; Said desorb reaction vessel comprise cyclic water jacket, filter screen, magnetic stirring apparatus, cyclic water jacket is communicated with thermostatical water bath, installs two-layer filter screen at the cyclic water jacket middle part; In the middle of two-layer filter screen, place coal petrography particle to be measured; The cyclic water jacket space of upper screen top forms the desorb reaction chamber, the cyclic water jacket space mounting magnetic stirring apparatus of lower screen below, and the cyclic water jacket of magnetic stirring apparatus below is communicated with main line through pipeline.
And, on the main line of check valve front end, also be provided with the branch pipeline, an emptying valve is installed on this minute pipeline.
Advantage of the present invention and beneficial effect are:
1, this device is seated in the coal petrography particulate samples under the state of different temperatures, different pressures, different rotating speeds recirculated water; The temperature of coal petrography particle under this temperature imitation stratum; The pressure state of this pressure imitation coal petrography particle under the stratum; The shearing force of this recirculated water is simulated the working fluid impact conditions of coal petrography particle under the stratum, in the laboratory, promptly forms the coal petrography particle shape of an emulation thus, with the desorb law-analysing of methane in the coal petrography particle under the influence of analysis liquid; And under different air pressure, liquid environment the amount of separating of methane and desorption rate in the coal petrography particle, the data of being gathered have higher accuracy.
2, this device Freeing Pipe road is provided with a check valve; Can imitate the desorption quantity of coal petrography particle adsorbed gas under the different pressures condition through this check valve; Desorption rate and the desorption quantity of the coal petrography particle of effectively accomplishing different-grain diameter under the different pressures condition, different liquids are to the desorption efficiency and the desorption quantity of coal petrography particle and coal gas is saturated and the discharge opeing desorption efficiency and the desorption quantity of dry coal appearance; Calculate the attenuation law of the contained adsorbed gas of coal petrography particle (methane) and escape gas speed, desorption quantity with quantitative test, for adsorbance and the desorption rate of analysing the contained adsorbed gas of coal petrography particle scientifically lays the foundation.
Description of drawings
Fig. 1 is a system of the present invention syndeton synoptic diagram;
Fig. 2 is the structure cutaway view Amplified image of desorb reaction vessel of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the embodiment of the invention is further specified; Following embodiment is illustrative, is not determinate, can not limit protection scope of the present invention with following embodiment.
A kind of coal petrography desorption is analyzed experimental provision; Referring to Fig. 1; On main line 4, connect methane gas tank 1, constant-flux pump 3, desorb reaction vessel 7, thermostatical water bath 10, check valve 9, measuring vessel 13, nitrogen pot 15 respectively; Wherein the methane gas tank is communicated with main line through a shutoff valve 2, and the measuring vessel side also is provided with a precise electronic balance 14, and superpressure liquid is used to weigh; Nitrogen pot is communicated with main line through shutoff valve 16, on the main line of measuring vessel front end, through shutoff valve 12 check valve is installed also, and nitrogen pot is communicated with check valve through the shutoff valve of oneself; On the main line of check valve front end, also be provided with the branch pipeline, an emptying valve 11 is installed on this minute pipeline, a voltage-limiting protector 5 is installed on main line.
The upper and lower of desorb reaction vessel all respectively is equipped with a shutoff valve 6,8; Can realize through these two valves: when opening upper valve and close the bottom valve, can keep having in the reaction vessel methane desorb of working fluid to analyze always; After when opening the bottom valve and closing upper valve, can accomplishing the injection working fluid; After the methane of separating sucking-off is discharged working fluid, fluid free desorb analysis in the reaction vessel.
The structure of the described desorb reaction vessel of present embodiment is referring to Fig. 2; Comprise cyclic water jacket 17, filter screen 20, magnetic stirring apparatus 21, cyclic water jacket is communicated with thermostatical water bath, and cyclic water jacket adopts the magnetism-free stainless steel material; Volume is about 100ml; Install two-layer filter screen at the cyclic water jacket middle part, in the middle of two-layer filter screen, place coal petrography particle 19 to be measured, the cyclic water jacket space of upper screen top forms desorb reaction chamber 18; The cyclic water jacket space mounting magnetic stirring apparatus of lower screen below, the cyclic water jacket of magnetic stirring apparatus below is communicated with main line through pipeline.
The effect of above-mentioned each parts is:
Methane gas tank: the simulation adsorbed gas is provided through the coal petrography particle of pipeline in the desorb reaction vessel.
Constant-flux pump: the working fluid that variety classes, different pressures are provided to the desorb reaction vessel.
Desorb reaction vessel: simulated formation temperature, and the working fluid impact conditions of simulation coal petrography particle under the stratum.
Thermostatical water bath: for the desorb reaction vessel provides 0-95 ℃ steady temperature, the temperature of simulation coal petrography reservoir.
Measuring vessel: the adsorbed gas that parses is collected, to weighing because of the working fluid of adsorbed gas overflow.
Nitrogen pot: for the desorb reaction vessel provides pressed gas.
Check valve: utilize check valve control reaction vessel internal pressure, be used to analyze the desorb rule of coal petrography particle methane under different pressures; Size through the adjustment back pressure is controlled the absorption and the pressure of desorb, surpasses the liquids and gases entering measuring vessel of this pressure.
Principle of work of the present invention is:
One, measures the adsorbance of coal petrography particle
Fills with water in measuring vessel;
Add the coal petrography particle of quantitatively confirming particle diameter between the two-layer filter screen in the desorb reaction vessel, open nitrogen pot and in the desorb reaction vessel, pressurize;
Close the shutoff valve of nitrogen pot, open the shutoff valve of methane gas tank, in the desorb reaction vessel, inject methane gas;
Close the shutoff valve of methane gas tank, open check valve, the aquifer yield of the piezometry measuring vessel through regulating check valve can draw the adsorbance of coal petrography;
Two, surveying work liquid is to the influence of desorb
Fills with water in measuring vessel;
Open the coal petrography particle that adds quantitatively definite particle diameter between the two-layer filter screen in the desorb reaction vessel, open nitrogen pot and in the desorb reaction vessel, pressurize;
Close the shutoff valve of nitrogen pot, open constant-flux pump, the working fluid of in the desorb reaction vessel, annotating is up to emptying valve fluid;
Close the emptying valve, open the measuring vessel valve, regulate check valve, measure the water yield;
The adsorbance of contrast adsorbed gas can be learnt the desorb influence of working fluid to the coal petrography particle.
Claims (3)
1. a coal petrography desorption is analyzed experimental provision; It is characterized in that: on main line, connect methane gas tank, constant-flux pump, desorb reaction vessel, thermostatical water bath, measuring vessel, nitrogen pot respectively; Wherein the methane gas tank is communicated with main line through a shutoff valve; The measuring vessel side also is provided with a precise electronic balance; Nitrogen pot is communicated with main line through shutoff valve, on the main line of measuring vessel front end, through shutoff valve one check valve is installed also, and nitrogen pot is communicated with check valve through shutoff valve.
2. coal petrography desorption according to claim 1 is analyzed experimental provision; It is characterized in that: said desorb reaction vessel comprise cyclic water jacket, filter screen, magnetic stirring apparatus; Cyclic water jacket is communicated with thermostatical water bath; Install two-layer filter screen at the cyclic water jacket middle part, in the middle of two-layer filter screen, place coal petrography particle to be measured, the cyclic water jacket space of upper screen top forms the desorb reaction chamber; The cyclic water jacket space mounting magnetic stirring apparatus of lower screen below, the cyclic water jacket of magnetic stirring apparatus below is communicated with main line through pipeline.
3. coal petrography desorption according to claim 1 is analyzed experimental provision, it is characterized in that: on the main line of check valve front end, also be provided with the branch pipeline, on this minute pipeline, an emptying valve be installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210359326.4A CN102841192B (en) | 2012-09-25 | 2012-09-25 | Desorption analysis experimental facility of coal rock |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210359326.4A CN102841192B (en) | 2012-09-25 | 2012-09-25 | Desorption analysis experimental facility of coal rock |
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| CN102841192A true CN102841192A (en) | 2012-12-26 |
| CN102841192B CN102841192B (en) | 2014-10-29 |
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Cited By (3)
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| CN106525637A (en) * | 2016-12-27 | 2017-03-22 | 重庆矿产资源开发有限公司 | Shale gas-content testing device and testing method |
| CN109917105A (en) * | 2019-03-14 | 2019-06-21 | 西南石油大学 | A kind of non-equilibrium continuous failure test method of condensate gas for considering pressure decay rate and influencing |
| CN112505161A (en) * | 2020-12-01 | 2021-03-16 | 西南石油大学 | Device and method for measuring content and precipitation amount of aromatic hydrocarbon substances in natural gas |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104697887B (en) * | 2015-03-31 | 2018-02-23 | 中国石油大学(华东) | The isothermal constant pressure experimentation device of gas-dynamic desorption flowing in danks |
| 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 |
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| CN112505161A (en) * | 2020-12-01 | 2021-03-16 | 西南石油大学 | Device and method for measuring content and precipitation amount of aromatic hydrocarbon substances in natural gas |
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| CN102841192B (en) | 2014-10-29 |
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