CN203011791U - Gas absorption/desorption testing device - Google Patents
Gas absorption/desorption testing device Download PDFInfo
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- CN203011791U CN203011791U CN 201220709791 CN201220709791U CN203011791U CN 203011791 U CN203011791 U CN 203011791U CN 201220709791 CN201220709791 CN 201220709791 CN 201220709791 U CN201220709791 U CN 201220709791U CN 203011791 U CN203011791 U CN 203011791U
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- 238000003795 desorption Methods 0.000 title claims abstract description 88
- 238000012360 testing method Methods 0.000 title claims abstract description 26
- 238000010521 absorption reaction Methods 0.000 title claims description 11
- 239000003245 coal Substances 0.000 claims abstract description 135
- 238000001179 sorption measurement Methods 0.000 claims abstract description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 238000002336 sorption--desorption measurement Methods 0.000 claims description 9
- 239000003638 chemical reducing agent Substances 0.000 claims description 7
- 150000001875 compounds Chemical class 0.000 claims description 7
- 238000002474 experimental method Methods 0.000 abstract description 16
- 238000009792 diffusion process Methods 0.000 abstract description 5
- 238000005259 measurement Methods 0.000 abstract description 3
- 239000003034 coal gas Substances 0.000 abstract description 2
- 238000005520 cutting process Methods 0.000 abstract description 2
- 238000007872 degassing Methods 0.000 abstract 2
- 239000002245 particle Substances 0.000 abstract 2
- 238000005086 pumping Methods 0.000 abstract 2
- 239000002131 composite material Substances 0.000 abstract 1
- 230000006866 deterioration Effects 0.000 abstract 1
- 238000005553 drilling Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 100
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 10
- 238000000034 method Methods 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000003556 assay Methods 0.000 description 1
- 238000013523 data management Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
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Abstract
一种瓦斯吸附解吸试验装置，包括充气系统、脱气系统、瓦斯吸附解吸系统和温度控制系统。充气系统包括高压气源和高压气源上的气体减压阀；脱气系统包括真空泵、复合真空计、真空规管和真空管系，真空管系上设有控制阀和真空抽气控制阀，复合真空计和真空规管串联在真空管系上，真空泵通过控制阀与真空管系相连接；瓦斯吸附解吸系统包括吸附单元和解吸单元，吸附单元包括充气罐、煤样罐和数据采集仪，充气罐上设有充气罐控制阀、仪表阀和压力传感器，充气罐控制阀上设有充气罐截止阀，煤样罐上设有煤样罐控制阀、仪表阀和压力传感器，煤样罐控制阀上设有煤样罐截止阀，煤样罐截止阀与充气罐控制阀相连，压力传感器与数据采集仪相连，解吸单元包括瓦斯解吸速度测定仪、高精度瓦斯解吸速度测定仪和连通瓦斯解吸速度测定仪与高精度瓦斯解吸速度测定仪的三通阀，三通阀另一端与煤样罐控制阀相连；充气罐截止阀通过三通阀与气体减压阀和真空抽气控制阀相连；温度控制系统包括恒温水浴和恒温水浴上连通的恒温器，吸附单元位于恒温水浴内。本实用新型结构简单，用于煤的吸附常数、极限瓦斯解吸量的测定，可以测定出不同温度、不同压力、不同变质程度和不同粒度条件下的损失气量、钻屑解吸指标和扩散系数等参数，适合颗粒煤瓦斯吸附解吸规律的试验；可模拟井下储层环境，可同时进行四组不同粒度碎屑煤样在不同温度条件的瓦斯吸附、解吸实验，可进行等温吸附试验、瓦斯放散试验，并且能直接测定瓦斯解吸损失量和瓦斯极限解吸量；可同时做多组瓦斯吸附放散实验，可有效提高实验效率，测定精度高。
A gas adsorption and desorption test device includes an air charging system, a degassing system, a gas adsorption and desorption system and a temperature control system. The inflation system includes a high-pressure gas source and a gas pressure reducing valve on the high-pressure gas source; the degassing system includes a vacuum pump, a composite vacuum gauge, a vacuum gauge and a vacuum piping system. The vacuum piping system is equipped with a control valve and a vacuum pumping control valve. The gauge and vacuum gauge are connected in series on the vacuum piping system, and the vacuum pump is connected to the vacuum piping system through a control valve; the gas adsorption and desorption system includes an adsorption unit and a desorption unit, and the adsorption unit includes an air tank, a coal sample tank and a data acquisition instrument, and the air tank is equipped with There are gas tank control valve, instrument valve and pressure sensor. The gas tank control valve is equipped with a gas tank stop valve. The coal sample tank is equipped with a coal sample tank control valve, instrument valve and pressure sensor. The coal sample tank control valve is equipped with a The shut-off valve of the coal sample tank, the shut-off valve of the coal sample tank is connected with the control valve of the gas filling tank, the pressure sensor is connected with the data acquisition instrument, the desorption unit includes the gas desorption speed tester, the high-precision gas desorption speed tester and the connection between the gas desorption speed tester and the gas desorption speed tester. The three-way valve of the high-precision gas desorption speed measuring instrument, the other end of the three-way valve is connected with the control valve of the coal sample tank; the stop valve of the gas filling tank is connected with the gas pressure reducing valve and the vacuum pumping control valve through the three-way valve; the temperature control system includes The constant temperature water bath is connected with the thermostat on the constant temperature water bath, and the adsorption unit is located in the constant temperature water bath. The utility model has a simple structure and is used for the determination of the adsorption constant of coal and the limit gas desorption capacity, and can measure parameters such as gas loss, drilling cuttings desorption index and diffusion coefficient under different temperatures, different pressures, different degrees of deterioration and different particle sizes. , suitable for experiments on the law of adsorption and desorption of granular coal gas; it can simulate the environment of underground reservoirs, and can simultaneously conduct gas adsorption and desorption experiments of four groups of debris coal samples with different particle sizes under different temperature conditions, and can conduct isothermal adsorption tests and gas release tests. And it can directly measure the gas desorption loss and gas limit desorption; multiple groups of gas adsorption and release experiments can be done at the same time, which can effectively improve the experimental efficiency and high measurement accuracy.
Description
Technical field
The utility model belongs to Experiments on Gas device technique field, particularly a kind of gas adsorption test device for desorption.
Background technology
Coal seam gas-bearing capacity and gas pressure are the crucial reservoir parameters that characterizes the coalbed methane reservoir feature, and Obtaining Accurate coal seam gas-bearing capacity and gas pressure are significant for coal bed gas resource exploratory development and coal-mine gas diaster prevention and control.According to coal seam gas-bearing capacity down-hole Direct Determination (GBT23250-2009) and survey coal seam gas-bearing capacity assay method in period (GB/T23249-2009), coal seam gas-bearing capacity equals stripping gas content, residual gas content and loss gas content three sum.Stripping gas content and residual gas content are directly surveyed by desorption experiment; Loss gas content is that coal sample begins to measure from being exposed to the gas amount of losing during the desorption of mash gas amount, can't directly record, and can only estimate by coal sample desorption of mash gas rule experimental formula.Due to the restriction of field condition, coal-bed gas pressure often can't directly be measured, and generally adopts the Langmuir equation by actual measurement gas bearing capacity Inversion Calculation coal-bed gas pressure, and two absorption constant a, b in the Langmuir equation must draw from the isothermal adsorption test.Therefore, gas adsorption and desorption experiment have realistic meaning.But, also do not have the test unit that can carry out isothermal adsorption and Methane Diffusion at present.
The utility model content
The utility model provide a kind of simple in structure, can carry out isothermal gas adsorption-diffuse experiment, experimental data is accurate and conventional efficient is high gas adsorption test device for desorption.
for achieving the above object, the technical solution of the utility model is: a kind of gas adsorption test device for desorption comprises gas charging system, degas system, gas adsorption desorption system and temperature control system, gas charging system comprises the gas pressure reducer on high-pressure air source and high-pressure air source, degas system comprises vacuum pump, compound vacuum gauge, vacuum gauge and vacuum piping, and vacuum tube is fastened and is provided with operation valve and vacuum suction operation valve, and compound vacuum gauge and vacuum gauge are connected on vacuum tube and fasten, and vacuum pump is connected with the vacuum piping by operation valve, the gas adsorption desorption system comprises absorbing unit and desorb unit, absorbing unit comprises gasing tank, coal sample tank and data collecting instrument, gasing tank is provided with the gasing tank operation valve, gauge valve and pressure transducer, the gasing tank operation valve is provided with the gasing tank stop valve, the coal sample tank is provided with coal sample tank operation valve, gauge valve and pressure transducer, coal sample tank operation valve is provided with coal sample tank stop valve, coal sample tank stop valve is connected with the gasing tank operation valve, pressure transducer is connected with data collecting instrument, the desorb unit comprises desorption of mash gas velocity determination instrument, the T-valve of high precision gas desorption rate tester and connection desorption of mash gas velocity determination instrument and high precision gas desorption rate tester, the T-valve other end is connected with coal sample tank operation valve, the gasing tank stop valve is connected with the vacuum suction operation valve with gas pressure reducer by T-valve, temperature control system comprises water bath with thermostatic control and the coconnected thermostat of water bath with thermostatic control, and absorbing unit is positioned at water bath with thermostatic control.
Described coal sample tank is four, be respectively the first coal sample tank, the second coal sample tank, the 3rd coal sample tank and the 4th coal sample tank, be equipped with coal sample tank operation valve, gauge valve and pressure transducer on each coal sample tank, coal sample tank operation valve is provided with coal sample tank stop valve, pressure transducer is connected with data collecting instrument, it is one group that the first coal sample tank is connected by coal sample tank operation valve separately with the second coal sample tank, and it is one group that the 3rd coal sample tank is connected by coal sample tank operation valve separately with the 4th coal sample tank; Be provided with the absorption T-valve between the coal sample tank stop valve of the first coal sample tank and gasing tank operation valve, the 3rd coal sample tank is connected with the absorption T-valve by coal sample tank stop valve; The coal sample tank stop valve of the second coal sample tank is provided with the first T-valve, the coal sample tank stop valve of the 4th coal sample tank is provided with the second T-valve, the other two ends of the first T-valve are connected with the high precision gas desorption rate tester with desorption of mash gas velocity determination instrument respectively, and the other two ends of the second T-valve are connected with the high precision gas desorption rate tester with desorption of mash gas velocity determination instrument respectively.
Described desorption of mash gas velocity determination instrument comprises 2 high range desorption instruments that are of a size of Φ 150mm * 1000mm, and the high precision gas desorption rate tester comprises the down scale desorption instrument that 6 minimum scales are 2ml.
Compared with prior art, the utility model has the advantages that:
1, the utility model comprises gas charging system, degas system, gas adsorption desorption system and temperature control system, it is simple in structure, be used for the absorption constant of coal, the mensuration of limit desorption of mash gas amount, can determine the parameters such as loss tolerance, Desorption Index for Drill Cuttings and coefficient of diffusion under different temperatures, different pressures, different rank and different grain size condition, be fit to the test of particulate coal gas adsorption adsorption law; Can simulate the downhole in reservoir environment, can carry out simultaneously four groups of different grain size chip coal samples in gas adsorption, the desorption experiment of condition of different temperatures, isothermal adsorption test, Methane Diffusion test can be carried out, and desorption of mash gas loss amount and gas limit solution pipette can be directly measured; Can do simultaneously many group gas adsorptions and diffuse experiment, can effectively improve conventional efficient, measure precision high.
2, it is constant that water bath with thermostatic control of the present utility model and thermostat can make system temperature, gets rid of the different interference of gas source temperature, and coal sample gas adsorption desorption process is carried out under same temperature, can realize integrality and the continuity of testing.
3, the utility model pressure-bearing pipeline everywhere is high-pressure rubber pipe, can strict pilot piping length, as much as possible reduce the free space of pipeline, and make experimental data more accurate.When carrying out the test chamber volume calibration, must be for satisfying accuracy requirement below 10Pa according to prior art regulation and stipulation vacuum tightness, yet general degas system is difficult to reach this requirement, degas system of the present utility model is used in conjunction with new method when vacuum tightness is not more than 100Pa, also can carry out accurate calibration to system's free space.
4, the desorb unit comprises the desorption of mash gas velocity determination instrument of high range and the high precision gas desorption rate tester of down scale, when doing desorb mensuration, the gas pressure Fast-Balance is measured with desorption of mash gas velocity determination instrument to the gas flow in atmospheric pressure period, gas pressure equilibrates to atmospheric pressure and measures with the high precision gas desorption rate tester later period, can avoid the dead space free gas to discharge fast the enormous impact that brings to the high precision gas desorption rate tester in the desorb starting stage, can eliminate the impact of dead space free gas again, convenient definite desorb zero-time, process for desorption data is processed, set up corresponding adsorption law model, calculate more accurately the gas loss amount.
5, data collecting instrument of the present utility model is computer-automatic collection to the data of required collection except desorption quantity, can reduce the error of artificial reading, and acquisition precision is high, can improve experiment accuracy rate and efficient.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Embodiment
Gas adsorption test device for desorption as shown in Figure 1, it comprises gas charging system, degas system, gas adsorption desorption system and the temperature control system that connects by pipeline.
Gas charging system comprises the gas pressure reducer 22 on high-pressure air source 19 and high-pressure air source 19.High-pressure air source 19 be by the concentration that helium general gas companies in Beijing is produced be 99.999%, pressure is the high-purity methane gas cylinder of 13.6Mpa, gas pressure reducer 22 with gas regulation to the required pressure of experiment, thereby provide the constant voltage source of the gas for the gas adsorption desorption system.
Degas system comprises vacuum pump 15, compound vacuum gauge 8, vacuum gauge 12 and vacuum piping 13, be provided with vacuum suction operation valve 14 on the top of vacuum piping 13, the bottom is provided with operation valve 23, be connected to vacuum piping 13 tops after 12 series connection of compound vacuum gauge 8 and vacuum gauge, vacuum pump 15 is connected with vacuum piping 13 by operation valve 23.The measurement range of compound vacuum gauge 8 is 1.0 * 10
5～1.0 * 10
-5Pa, control accuracy be≤± 1%.Vacuum pump 15 is Double-stage rotary vane vacuum pump.
The gas adsorption desorption system comprises absorbing unit and desorb unit, and absorbing unit comprises gasing tank 18, the first coal sample tank 9, the second coal sample tank 92, the 3rd coal sample tank 93, the 4th coal sample tank 94 and data collecting instrument 6.Be provided with gasing tank operation valve 17, gauge valve 16 and pressure transducer 21 on gasing tank 18, gasing tank operation valve 17 right-hand members are provided with gasing tank stop valve 24, and gasing tank stop valve 24 is connected with vacuum suction operation valve 14 with gas pressure reducer 22 by T-valve 28.Coal sample tank 9 is provided with coal sample tank operation valve 5, gauge valve 25 and pressure transducer 26, and coal sample tank operation valve 5 one ends are provided with coal sample tank stop valve 11; Coal sample tank 92 is provided with coal sample tank operation valve 52, gauge valve 252 and pressure transducer 262, and coal sample tank operation valve 52 left ends are provided with coal sample tank stop valve 112; Coal sample tank 93 is provided with coal sample tank operation valve 53, gauge valve 253 and pressure transducer 263, and coal sample tank operation valve 53 right-hand members are provided with coal sample tank stop valve 113; Coal sample tank 94 is provided with coal sample tank operation valve 54, gauge valve 254 and pressure transducer 264, and coal sample tank operation valve 54 left ends are provided with coal sample tank stop valve 114.Pressure transducer 21, pressure transducer 26, pressure transducer 262, pressure transducer 263 and pressure transducer 264 all are connected on data collecting instrument 6, can read in real time the gaseous tension numerical value in each tank body.It is one group that the first coal sample tank 9 is connected by coal sample tank operation valve 5 and coal sample tank operation valve 52 with the second coal sample tank 92, and it is one group that the 3rd coal sample tank 93 is connected by coal sample tank operation valve 53 and coal sample tank operation valve 54 with the 4th coal sample tank 94.Being provided with absorption T-valve 20, the three coal sample tanks 93 between the coal sample tank stop valve 11 of the first coal sample tank 9 and gasing tank operation valve 17 is connected with this absorption T-valve 20 by coal sample tank stop valve 113.Be connected with on the coal sample tank stop valve 112 of the second coal sample tank 92 and be connected with the second T-valve 3, the first T-valve 27 on the coal sample tank stop valve 114 of the first T-valve 27, the 4th coal sample tank 94 and the second T-valve 3 is the glass three-way valve.The desorb unit comprises desorption of mash gas velocity determination instrument 2 and high precision gas desorption rate tester 1, desorption of mash gas velocity determination instrument 2 comprises 2 high range desorption instruments that are of a size of Φ 150mm * 1000mm, high precision gas desorption rate tester 1 comprises the down scale desorption instrument that 6 minimum scales are 2ml, the gas pressure Fast-Balance is measured with desorption of mash gas velocity determination instrument 2 to the gas flow in atmospheric pressure period, and gas pressure equilibrates to atmospheric pressure and measures with high precision gas desorption rate tester 1 later period.First T-valve 27 all the other two ends are connected with high precision gas desorption rate tester 1 with desorption of mash gas velocity determination instrument 2 from left end respectively, second T-valve 3 all the other two ends are connected with high precision gas desorption rate tester 1 with desorption of mash gas velocity determination instrument 2 from right-hand member respectively, realize that by regulating the first T-valve 27 and the second T-valve 3 switching of desorb unit is used.
Temperature control system comprises water bath with thermostatic control 7 and the coconnected thermostat 4 of water bath with thermostatic control 7, absorbing unit is positioned at water bath with thermostatic control 7, namely gasing tank 18 and on gasing tank operation valve 17, gauge valve 16 and pressure transducer 21,4 coal sample tanks 9 and on coal sample tank operation valve 5, gauge valve 25 be positioned at water bath with thermostatic control 7 with pressure transducer 26, data collecting instrument 6 and gasing tank stop valve 24, T-valve 20 and T-valve 28.Water bath with thermostatic control 7 is a large-scale automatic constant-temperature water-bath, and experimental provision is put into water bath with thermostatic control 7, controls whole experimental situation temperature by regulating water temperature.The temperature regulating range of temperature control system is that-10 ℃～90 ℃, temperature changing speed are that 2min/ ℃, temperature control precision are ± 0.05 ℃.
In the utility model, data collecting instrument 6 is mainly by gaseous tension and atmospheric pressure in the temperature of computer-automatic collection water bath with thermostatic control 7, environment temperature, vacuum tightness, tank body.
In the present embodiment, coal sample tank 9 is of a size of Φ 50mm * 100mm, and the volume of gasing tank 18 is 2000ml, and coal sample tank 9 is all set two-layer O-ring seal to guarantee the tank body sealing with gasing tank 18; Pressure-bearing pipeline everywhere is high-pressure rubber pipe, and the high-pressure rubber pipe internal diameter is 4mm, the gaseous tension of anti-64MPa, can reduce the volume of free space and improve the security of testing; Stop valve and operation valve be the gaseous tension of anti-16MPa all.
The step that the utility model carries out the experiment of gas adsorption adsorption law is as follows:
(1) prepare before the experiment
Deliver to the laboratory after the fresh coal sample of choosing getting working face tightly encapsulates, fresh coal sample is pulverized, is sieved into required granularity, choose respectively the coal sample of corresponding granularity and carry out the isoparametric mensuration of technical analysis, real density and pseudodensity.
(2) experimental provision detects debugging
Testing fixture is reliable to guarantee that system connects, and uses N
2The impermeability of testing fixture; With coal sample oven dry, the oven dry coal sample that takes certain mass is packed in coal sample tank 9; Then, opening coal sample tank operation valve 5, coal sample tank stop valve 11, vacuum suction operation valve 14 and gasing tank operation valve 17, close gauge valve 16 and gauge valve 25, open vacuum pump 15 degassed, until vacuum gauge pressure shows that 20Pa can close vacuum pump 15 more than three hours; Carrying out stereometry and the residual volume of coal sample tank 9 measures; System and desorption of mash gas velocity determination instrument 2 are connected, read the initial liquid level h of graduated cylinder
1At last, open vacuum valve air is entered in tested coal sample tank 9 and pipeline thereof, the interior liquid level of graduated cylinder this moment rises to h
2, h
2-h
1Volume be the volume of tested coal sample tank 9 and pipeline thereof, atmospheric pressure, indoor temperature, water temperature in recording room simultaneously are so that correction data.
(3) adsorption experiment
The temperature of water bath with thermostatic control 7 is transferred to predetermined value, is filled with a certain amount of gas to gasing tank 18, the force value after record is stable; Then, successively coal sample tank 9 is inflated, when force value during lower than predetermined value, need to carry out tonifying Qi to coal sample tank 9,, need exit to coal sample tank 9 during higher than predetermined value when force value, repeatable operation like this, until continuous 3 hours readings of tensimeter are constant and adsorption time greater than 8h, think that absorption has reached balance, records related data; Repeat above-mentioned steps, obtain at least eight groups of data under the different pressures condition, can be calculated absorption constant a, b value by Data Management Analysis.
(4) desorption experiment
In adsorption test, after each adsorption equilibrium, carry out the Methane Diffusion test.After coal sample tank 9 after adsorption equilibrium and high precision gas desorption rate tester 1 are connected, measure the Changing Pattern of temporal evolution desorption rate and accumulative total gas desorption amount.Measure when just having begun, read number one time every 1min, in time prolongation after 20min, the gas desorption amount reduces, reading interval proper extension, the total test duration is 120min; Simultaneously, recording laboratory atmospheric temperature, desorption instrument tank temperature and atmospheric pressure are so that Data correction.Under different temperatures, pressure condition, gas limit solution pipette equals adsorbance under this temperature and pressure condition and deducts adsorbance under desorption temperature and pressure condition.Desorption quantity is large owing to just beginning, and measure with desorption of mash gas velocity determination instrument 2; When the gas desorption amount reduces, use high precision gas desorption rate tester 1 instead and measure.
(5) experiment finishes
Arrange experimental record, the analytical calculation experimental data.
In step (2), in order to guarantee the accuracy of experimental apparatus volume calibration, its mean value is got in repeated test 5 times.
Be not limited to above-mentioned embodiment, the utility model can be fixed on support, the utility model is positioned in water bath with thermostatic control 7 together with support, and support is connected with jacking gear.
Claims (3)
1. a gas adsorption test device for desorption, is characterized in that, comprises gas charging system, degas system, gas adsorption desorption system and temperature control system, gas charging system comprises the gas pressure reducer on high-pressure air source and high-pressure air source, degas system comprises vacuum pump, compound vacuum gauge, vacuum gauge and vacuum piping, and vacuum tube is fastened and is provided with operation valve and vacuum suction operation valve, and compound vacuum gauge and vacuum gauge are connected on vacuum tube and fasten, and vacuum pump is connected with the vacuum piping by operation valve, the gas adsorption desorption system comprises absorbing unit and desorb unit, absorbing unit comprises gasing tank, coal sample tank and data collecting instrument, gasing tank is provided with the gasing tank operation valve, gauge valve and pressure transducer, the gasing tank operation valve is provided with the gasing tank stop valve, the coal sample tank is provided with coal sample tank operation valve, gauge valve and pressure transducer, coal sample tank operation valve is provided with coal sample tank stop valve, coal sample tank stop valve is connected with the gasing tank operation valve, pressure transducer is connected with data collecting instrument, the desorb unit comprises desorption of mash gas velocity determination instrument, the T-valve of high precision gas desorption rate tester and connection desorption of mash gas velocity determination instrument and high precision gas desorption rate tester, the T-valve other end is connected with coal sample tank operation valve, the gasing tank stop valve is connected with the vacuum suction operation valve with gas pressure reducer by T-valve, temperature control system comprises water bath with thermostatic control and the coconnected thermostat of water bath with thermostatic control, and absorbing unit is positioned at water bath with thermostatic control.
2. gas adsorption test device for desorption as claimed in claim 1, it is characterized in that, described coal sample tank is four, be respectively the first coal sample tank, the second coal sample tank, the 3rd coal sample tank and the 4th coal sample tank, be equipped with coal sample tank operation valve, gauge valve and pressure transducer on each coal sample tank, coal sample tank operation valve is provided with coal sample tank stop valve, pressure transducer is connected with data collecting instrument, it is one group that the first coal sample tank is connected by coal sample tank operation valve separately with the second coal sample tank, and it is one group that the 3rd coal sample tank is connected by coal sample tank operation valve separately with the 4th coal sample tank; Be provided with the absorption T-valve between the coal sample tank stop valve of the first coal sample tank and gasing tank operation valve, the 3rd coal sample tank is connected with the absorption T-valve by coal sample tank stop valve; The coal sample tank stop valve of the second coal sample tank is provided with the first T-valve, the coal sample tank stop valve of the 4th coal sample tank is provided with the second T-valve, the other two ends of the first T-valve are connected with the high precision gas desorption rate tester with desorption of mash gas velocity determination instrument respectively, and the other two ends of the second T-valve are connected with the high precision gas desorption rate tester with desorption of mash gas velocity determination instrument respectively.
3. gas adsorption test device for desorption as claimed in claim 1 or 2, it is characterized in that, described desorption of mash gas velocity determination instrument comprises 2 high range desorption instruments that are of a size of Φ 150mm * 1000mm, and the high precision gas desorption rate tester comprises the down scale desorption instrument that 6 minimum scales are 2ml.
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| CN103760064A (en) * | 2014-01-23 | 2014-04-30 | 平顶山天安煤业股份有限公司 | Coal sample gas adsorption and desorption experiment device and method under variable pressure condition |
| CN103995094A (en) * | 2014-06-14 | 2014-08-20 | 开滦(集团)有限责任公司技术中心 | Experiment device of rotatably disturbing coal body rich in gas |
| CN104062204A (en) * | 2014-07-11 | 2014-09-24 | 中国石油大学(华东) | High-temperature and high-pressure adsorption and desorption device and use method thereof |
| CN104990865A (en) * | 2015-06-24 | 2015-10-21 | 辽宁工程技术大学 | Experiment system and method for testing desorption characteristic of coal to gas under vibration condition |
| CN105588929A (en) * | 2016-03-20 | 2016-05-18 | 贵州大学 | Water bath constant-temperature methane diffusion determination system |
| CN105865969A (en) * | 2016-06-13 | 2016-08-17 | 中国地质大学（北京） | Isothermal adsorption and desorption system and method for raw coal |
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2012
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