CN214010979U - Device for measuring methane adsorption amount of coal in gas-containing mixed gas under normal pressure - Google Patents
Device for measuring methane adsorption amount of coal in gas-containing mixed gas under normal pressure Download PDFInfo
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- CN214010979U CN214010979U CN202022974918.XU CN202022974918U CN214010979U CN 214010979 U CN214010979 U CN 214010979U CN 202022974918 U CN202022974918 U CN 202022974918U CN 214010979 U CN214010979 U CN 214010979U
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- 239000003245 coal Substances 0.000 title claims abstract description 78
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 62
- 238000001179 sorption measurement Methods 0.000 title claims abstract description 59
- 238000004868 gas analysis Methods 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 10
- 238000010438 heat treatment Methods 0.000 claims abstract description 7
- 239000007788 liquid Substances 0.000 claims description 12
- 238000007405 data analysis Methods 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims 1
- 238000011160 research Methods 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 4
- 238000004445 quantitative analysis Methods 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 78
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000001307 helium Substances 0.000 description 2
- 229910052734 helium Inorganic materials 0.000 description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000002269 spontaneous effect Effects 0.000 description 2
- 239000002156 adsorbate Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000004817 gas chromatography Methods 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000002336 sorption--desorption measurement Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000009849 vacuum degassing Methods 0.000 description 1
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Abstract
A device for measuring the adsorption capacity of coal to methane in gas-containing mixed gas under normal pressure comprises an adsorption unit and a gas analysis unit; the adsorption unit comprises an air bag, a volume metering tube, a lifting platform, a horizontal adjusting cup, a pressure gauge, a constant temperature heating tank, a vacuum pump and a coal sample tank; the gas analysis unit includes a computer, a gas chromatograph, and a dosing pump. Through the cooperation of the adsorption unit and the gas analysis unit, the total adsorption amount of the coal to the gas-containing mixed gas is accurately measured, and the methane gas adsorption is calculatedThe adsorption quantity can be used for carrying out quantitative analysis of the adsorption quantity of the coal to the methane in the mixed gas under normal pressure and experimental research on the adsorption effect characteristics of the coal. The method is simple to operate and accurate in measurement, overcomes the defects of the prior art, makes up the vacancy of the existing experimental research means, and is used for researching coal-to-methane (CH) between coal and multi-element mixed gas4) The adsorption capacity and the adsorption effect characteristics thereof have important theoretical significance and application value.
Description
Technical Field
The utility model relates to a coal pair contains methane (CH) among the gas mist under ordinary pressure4) An adsorption quantity measuring device, in particular to a device which is suitable for measuring methane (CH) in a laboratory during the adsorption process of coal on each component gas in gas-containing mixed gas4) And (5) testing the adsorption quantity.
Background
Research shows that the coal has internal and external surfacesThe dynamic adsorption and desorption process of the multi-component mixed gas with different degrees is carried out, and the coal body has no effect on methane (CH)4) Has the adsorption characteristic and also has the adsorption function on other gases. For example, the physical adsorption process of coal to oxygen and its oxygen uptake capacity affect the spontaneous combustion process of coal. For the mixed gas with high gas content and easy spontaneous combustion coal bed, pressure relief area and goaf to gush out, the method can accurately determine how to determine CH in the mixed gas with gas content4The adsorption capacity and the adsorption capacity thereof have very important significance for formulating a gas comprehensive treatment technology, eliminating gas hidden dangers and preventing and controlling gas accidents.
At present, most of researches on coal-adsorbed methane focus on the determination of adsorption characteristic parameters and adsorption-desorption curves of coal on pure methane, but an experimental method for adsorbing methane adsorption quantity and adsorption characteristics in gas-containing mixed gas by coal under normal pressure is lack of researches, adsorbates are often limited to single component gas, and quantitative analysis of the adsorption quantity of the coal on the methane in the mixed gas and experimental researches on the adsorption characteristics cannot be carried out.
Disclosure of Invention
The utility model discloses an overcome prior art not enough, provide an easy operation, measure accurate coal to methane adsorption capacity and adsorption capacity's experiment survey device in the mist.
In order to achieve the purpose, the device for measuring the methane adsorption capacity of the coal in the mixed gas containing the gas under the normal pressure comprises an adsorption unit and a gas analysis unit; the adsorption unit comprises a tail gas outlet pipe, an air bag, a volume metering pipe, a lifting table, a horizontal adjusting cup, a pressure gauge, a constant-temperature heating tank, a vacuum pump and a coal sample tank; the tail part of the volume metering pipe is connected with a horizontal adjusting cup arranged on a lifting platform through a rubber pipe, and the liquid level height of the volume metering pipe is adjusted by adjusting the height of the lifting platform; the coal sample tank is arranged in the constant-temperature heating tank; the gas analysis unit comprises a gas chromatograph and a computer, the gas chromatograph is connected with the computer for data analysis and data display, and the gas chromatograph is connected with the coal sample tank.
And the tail gas outlet pipe is sequentially provided with a tail gas outlet valve, a metering pipe valve and a pressure gauge, wherein the metering pipe valve is arranged between the volume metering pipe and the tail gas outlet pipe connected with the vacuum pump, and the pressure gauge is arranged between the vacuum pump and the tail gas outlet pipe connected with the coal sample tank.
And an air bag valve is arranged on the air bag outlet pipeline.
The vacuum pump, the coal sample tank and the volume metering pipe are connected through a three-way pipe, wherein a vacuum pump valve is arranged on a pipeline between the vacuum pump and the coal sample tank.
And a quantitative pump is arranged between the coal sample tank and the gas chromatograph.
And a coal sample tank valve is arranged between the quantitative pump and the coal sample tank.
Has the advantages that: since the technical scheme is used, the utility model discloses remedy the vacancy of current experimental research means, to between research coal and the many first mixed gas coal to methane (CH)4) The adsorption capacity and the adsorption characteristic thereof provide important theoretical significance and an applied means, the total adsorption amount of the coal to the gas-containing mixed gas is accurately measured through the matching of the adsorption unit and the gas analysis unit, and the adsorption capacity of the methane gas is calculated, so that the quantitative analysis of the adsorption capacity of the coal to the methane in the mixed gas and the experimental research of the adsorption characteristic thereof under normal pressure can be carried out. The method is simple to operate and accurate in measurement, overcomes the defects of the prior art, makes up the vacancy of the existing experimental research means, and is used for researching coal-to-methane (CH) between coal and multi-element mixed gas4) The adsorption capacity and the adsorption effect characteristics thereof have important theoretical significance and application value.
Drawings
The present invention will be further explained with reference to the drawings and examples.
The following fig. 1 is a schematic structural diagram of the present invention:
1-tail gas outlet, 2-tail gas outlet valve, 3-air bag valve, 4-air bag, 5-water level regulating cup, 6-lifting table, 7-volume metering pipe, 8-metering pipe valve, 9-pressure gauge, 10-vacuum pump valve, 11-vacuum pump, 12-coal sample tank, 13-constant temperature water bath, 14-coal sample tank valve, 15-metering pump, 16-gas chromatograph and 17-computer.
Detailed Description
The invention will be further described with reference to examples of embodiments in the drawings to which:
the device for measuring the methane adsorption capacity of the coal in the mixed gas containing the gas under the normal pressure comprises an adsorption unit and a gas analysis unit; the adsorption unit comprises a tail gas outlet pipe 1, an air bag 4, a volume metering pipe 7, a lifting platform 6, a horizontal adjusting cup 5, a pressure gauge 9, a constant temperature heating tank 13, a vacuum pump 11 and a coal sample tank 12; wherein, gasbag 4, volume metering pipe 7, vacuum pump 11 and coal sample jar 12 are continuous with tail gas outlet pipe 1 respectively through the pipeline, be equipped with tail gas outlet valve 2, metering pipe valve 8 and manometer 9 on the tail gas outlet pipe 1 in proper order, wherein, metering pipe valve 8 is established between the tail gas outlet pipe that volume metering pipe 7 and vacuum pump 11 are connected, and manometer 9 is established between the tail gas outlet pipe that vacuum pump 11 and coal sample jar 12 are connected. An air bag valve 3 is arranged on an outlet pipeline of the air bag 4; the vacuum pump 11, the coal sample tank 12 and the volume metering pipe 7 are connected through a three-way pipe, wherein a vacuum pump valve 10 is arranged on a pipeline between the vacuum pump 11 and the coal sample tank 12; a quantitative pump 15 is arranged between the coal sample tank 12 and the gas chromatograph 16; a coal sample tank valve 14 is arranged between the quantitative pump 15 and the coal sample tank 12. The tail part of the volume metering pipe 7 is connected with a horizontal adjusting cup 5 arranged on a lifting platform 6 through a rubber pipe, and the liquid level height of the volume metering pipe 7 is adjusted by adjusting the height of the lifting platform 6; the coal sample tank 12 is arranged in the constant-temperature heating tank 13; the gas analysis unit comprises a gas chromatograph 16 and a computer 17, the gas chromatograph 16 is connected with the computer 17 for data analysis and data display, and the gas chromatograph 16 is connected with the coal sample tank 12.
The working principle and the working process are as follows:
(1) and (3) air tightness detection: the coal sample tank is unloaded, the tail gas outlet valve 2, the air bag valve 3, the metering pipe valve 8 and the coal sample tank valve 14 are closed, the vacuum pump valve (10) is opened, the vacuum pump (11) is started, the coal sample tank (12) is vacuumized for 2 hours, the vacuum pump (11) is closed, the metering pipe valve 8 is opened, the liquid level of the volume metering pipe 7 gradually rises, after the liquid level reaches the highest point, the device is kept stand for 6 hours, if the liquid level drops to be lower than 2ml, the gas tightness is good, subsequent experiments can be continued, otherwise, the gas tightness of the device is checked and improved until the above standard is reached.
(2) Measuring free volume: injecting helium into an air bag 4, loading an experimental coal sample into a coal sample tank 12, setting the temperature of a constant-temperature water bath 13, closing an air bag valve 3, a metering pipe valve 8, opening a tail gas outlet valve 2, adjusting the height of a lifting platform 6 to make the liquid level of a volume metering pipe 7 reach the maximum, closing the tail gas outlet valve 2, the metering pipe valve 8, opening the air bag valve 3, adjusting a water level adjusting cup 5 to make the liquid level of the volume metering pipe 7 fall to a certain middle scale mark, at the moment, filling the volume metering pipe 7 with the helium, closing the air bag valve 3, the metering pipe valve 8 and a coal sample tank valve 14, opening a vacuum pump valve 10, performing vacuum degassing on the coal sample tank 12, closing the vacuum pump valve 10 after degassing is completed, opening the metering pipe valve 8, reading the rising volume of the volume metering pipe 7 after the liquid level of the volume metering pipe 7 is stable, and recording the rising volume as VFromI.e. the free volume of the coal sample tank 12, including the volume in the pipeline between the coal sample tank 12 and the volume measuring pipe 7.
(3) And (3) measuring the total adsorption quantity of the gas-containing mixed gas: the pre-configured gas mixture containing gas is injected into the air bag 4, and the subsequent adsorption experiment steps are the same as the free volume determination process and are not repeated. In the adsorption process, when the liquid level rises to reach VFromThen, the height at which the liquid level continues to rise is the total adsorption amount of the gas-containing mixed gas in this state, and is denoted as VSuction device. Further, the temperature T of the constant temperature water bath 13 and the reading P of the pressure gauge 9, the total adsorption amount of the gas-containing mixed gas under the standard condition:
V＝PVsuction deviceT0/P0T
In the formula: v is the total adsorption capacity, ml, of the gas-containing mixed gas adsorbed by the coal sample in the standard state;
P0-standard atmospheric pressure, Pa;
T0-kelvin degrees celsius, K, at standard conditions;
p is the pressure in the experimental state, Pa;
T-Kelvin degrees Celsius in the experimental regime, K.
(4) Methane (CH) in gas-containing mixed gas4) And (3) measuring the adsorption quantity: after the gas-containing mixed gas is adsorbed and balanced, standing for 30 minutes to uniformly mix the gas molecules in the coal sample tank 12 and the volume metering pipe 7, firstly opening the gas chromatograph 16, then opening the valve 14 of the coal sample tank, and finally opening the metering pump 15 to perform gas chromatography analysis on the gas in the coal sample tank 12 to obtain the volume fraction of each component gas in the coal sample tank 12. It is known to formulate methane (CH) in a gas4) In a volume fraction of
Adsorption of equilibrated methane (CH)4) Volume fraction of (2)
The sum of the volume above the liquid level of the volume metering tube 7 at the initial adsorption moment and the free volume is VGeneral assemblyThen, the adsorption amount of the component gas i:
wherein:
preparation of methane (CH) in the gas4) Volume fraction of (d)%;
Claims (6)
1. A device for measuring the adsorption capacity of coal to methane in gas-containing mixed gas under normal pressure comprises an adsorption unit and a gas analysis unit; the method is characterized in that: the adsorption unit comprises a tail gas outlet pipe (1), an air bag (4), a volume metering pipe (7), a lifting platform (6), a horizontal adjusting cup (5), a pressure gauge (9), a constant temperature heating tank (13), a vacuum pump (11) and a coal sample tank (12); the tail part of the volume metering pipe (7) is connected with a horizontal adjusting cup (5) arranged on a lifting platform (6) through a rubber pipe, and the liquid level height of the volume metering pipe (7) is adjusted by adjusting the height of the lifting platform (6); the coal sample tank (12) is arranged in the constant-temperature heating tank (13); the gas analysis unit comprises a gas chromatograph (16) and a computer (17), the gas chromatograph (16) is connected with the computer (17) for data analysis and data display, and the gas chromatograph (16) is connected with the coal sample tank (12).
2. The apparatus for measuring the amount of methane adsorbed by coal under atmospheric pressure in a gas-containing mixed gas according to claim 1, wherein: the coal sample tank is characterized in that a tail gas outlet valve (2), a metering pipe valve (8) and a pressure gauge (9) are sequentially arranged on the tail gas outlet pipe (1), wherein the metering pipe valve (8) is arranged between the tail gas outlet pipes connected with a volume metering pipe (7) and a vacuum pump (11), and the pressure gauge (9) is arranged between the tail gas outlet pipes connected with the vacuum pump (11) and the coal sample tank (12).
3. The apparatus for measuring the amount of methane adsorbed by coal under atmospheric pressure in a gas-containing mixed gas according to claim 1, wherein: and an air bag valve (3) is arranged on an outlet pipeline of the air bag (4).
4. The apparatus for measuring the amount of methane adsorbed by coal under atmospheric pressure in a gas-containing mixed gas according to claim 1, wherein: the coal sampling device is characterized in that the vacuum pump (11), the coal sample tank (12) and the volume metering pipe (7) are connected through a three-way pipe, wherein a vacuum pump valve (10) is arranged on a pipeline between the vacuum pump (11) and the coal sample tank (12).
5. The apparatus for measuring the amount of methane adsorbed by coal under atmospheric pressure in a gas-containing mixed gas according to claim 1, wherein: a quantitative pump (15) is arranged between the coal sample tank (12) and the gas chromatograph (16).
6. The apparatus according to claim 5, wherein the apparatus is configured to measure the amount of methane adsorbed in the gas-containing mixed gas by the coal under atmospheric pressure, and further comprises: a coal sample tank valve (14) is arranged between the quantitative pump (15) and the coal sample tank (12).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022974918.XU CN214010979U (en) | 2020-12-08 | 2020-12-08 | Device for measuring methane adsorption amount of coal in gas-containing mixed gas under normal pressure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022974918.XU CN214010979U (en) | 2020-12-08 | 2020-12-08 | Device for measuring methane adsorption amount of coal in gas-containing mixed gas under normal pressure |
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| CN214010979U true CN214010979U (en) | 2021-08-20 |
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| CN202022974918.XU Expired - Fee Related CN214010979U (en) | 2020-12-08 | 2020-12-08 | Device for measuring methane adsorption amount of coal in gas-containing mixed gas under normal pressure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114414698A (en) * | 2022-01-21 | 2022-04-29 | 北京博赛德科技有限公司 | System for simultaneously analyzing multiple trace impurities in hydrogen and detection method thereof |
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2020
- 2020-12-08 CN CN202022974918.XU patent/CN214010979U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114414698A (en) * | 2022-01-21 | 2022-04-29 | 北京博赛德科技有限公司 | System for simultaneously analyzing multiple trace impurities in hydrogen and detection method thereof |
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Granted publication date: 20210820 |