CN109540734B - Gas-containing coal high-pressure adsorption/desorption test device and method capable of controlling moisture - Google Patents
Gas-containing coal high-pressure adsorption/desorption test device and method capable of controlling moisture Download PDFInfo
- Publication number
- CN109540734B CN109540734B CN201910020382.7A CN201910020382A CN109540734B CN 109540734 B CN109540734 B CN 109540734B CN 201910020382 A CN201910020382 A CN 201910020382A CN 109540734 B CN109540734 B CN 109540734B
- Authority
- CN
- China
- Prior art keywords
- pressure
- valve
- tank
- test
- moisture
- 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.)
- Active
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 190
- 239000003245 coal Substances 0.000 title claims abstract description 113
- 238000002336 sorption--desorption measurement Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 20
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 26
- 239000012266 salt solution Substances 0.000 claims abstract description 25
- 229910017053 inorganic salt Inorganic materials 0.000 claims abstract description 22
- 230000008859 change Effects 0.000 claims abstract description 10
- 239000007789 gas Substances 0.000 claims description 109
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 98
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 98
- 239000001307 helium Substances 0.000 claims description 39
- 229910052734 helium Inorganic materials 0.000 claims description 39
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 39
- 238000007789 sealing Methods 0.000 claims description 32
- 238000001179 sorption measurement Methods 0.000 claims description 30
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical class [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 24
- 238000003860 storage Methods 0.000 claims description 19
- 238000005192 partition Methods 0.000 claims description 18
- 239000002245 particle Substances 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 10
- 239000002817 coal dust Substances 0.000 claims description 8
- 238000004458 analytical method Methods 0.000 claims description 6
- 238000003795 desorption Methods 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 5
- 239000012153 distilled water Substances 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 238000012216 screening Methods 0.000 claims description 3
- 239000011780 sodium chloride Substances 0.000 claims description 3
- 238000009849 vacuum degassing Methods 0.000 claims description 3
- 238000011049 filling Methods 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 claims description 2
- 238000005086 pumping Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000005755 formation reaction Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 206010003497 Asphyxia Diseases 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000002052 molecular layer Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000012047 saturated solution Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N7/00—Analysing materials by measuring the pressure or volume of a gas or vapour
- G01N7/02—Analysing materials by measuring the pressure or volume of a gas or vapour by absorption, adsorption, or combustion of components and measurement of the change in pressure or volume of the remainder
- G01N7/04—Analysing materials by measuring the pressure or volume of a gas or vapour by absorption, adsorption, or combustion of components and measurement of the change in pressure or volume of the remainder by absorption or adsorption alone
Abstract
The invention relates to a device and a method for testing high-pressure adsorption/desorption of gas-containing coal with controllable moisture, and belongs to the field of gas-containing coal tests. The device comprises a vacuumizing system, an inflating system, a constant temperature system and a gas adsorption/desorption testing system for controlling moisture; the controllable moisture test tank successfully solves the problem that moisture in a coal body changes due to overlong test time or change of test conditions and the like by utilizing the principle that the saturated inorganic salt solution keeps the humidity of a closed space. The invention comprises a vacuumizing system, an inflating system, a constant temperature system and a gas adsorption/desorption testing system for controlling moisture, and has the advantages of simple integral structure, convenient operation, obvious use effect and lower cost.
Description
Technical Field
The invention belongs to the field of gas-containing coal body tests, and relates to a gas-containing coal body high-pressure adsorption/desorption test device and method capable of controlling moisture.
Background
The gas (coalbed methane) is an associated organism in the coal generation process, is a natural gas generated by humic organic matters in the coal formation process and is endowed to coal beds and coal formations, and the main component of the gas is methane. Gas is an important hidden trouble for causing coal mine production safety accidents. Gas is supplied to the coal seam in both a free state and an adsorbed state. In coal seam exploitation, the coal seam gas is continuously released due to the influence of underground mining operation, so that the damages such as coal and gas outburst, gas explosion, gas asphyxia and the like are caused, and the safety and health development of the coal industry in China are seriously threatened. From the energy perspective, the gas is a clean, convenient and efficient novel energy source. Therefore, accurately grasping the gas adsorption/desorption characteristics of the coal seam is a key place for preventing coal mine safety accidents and efficiently developing and utilizing the coal seam gas.
It is well known that coal is a porous medium in which both pores and fissures exist. The occurrence environment of the original coal seam is an organic system in which coal, gas and water coexist. The water in coal exists mainly in both free water and intrinsic water forms. The free water mainly exists in the cracks of the coal body, the inherent water mainly exists in the pores of the coal body in the modes of multi-molecular layer physical adsorption, agglomeration and the like, and the more developed the pores are, the larger the inherent water content is.
At present, the influence analysis of the moisture on the adsorption/desorption characteristics of the gas-containing coal is mainly researched in a laboratory, and the preparation of the water-content coal sample mainly comprises the following water injection method and the saturated external saturated salt solution method.
The water injection method. According to the method, liquid water is immersed into the coal sample, and the water content in the coal sample is controlled by the quality of the injected liquid water, so that the coal samples with different water contents are manufactured. Such as the test device and method of desorption characteristics of additional moisture to gas-containing coal body authorized by China patent document CN 201010580065.
The external saturated salt solution method. The principle of the method is to control the water content of the coal sample in the test tank by using saturated salt solution. According to the gas adsorption and desorption characteristic testing device and testing method for pre-adsorbed water coal samples, as disclosed in Chinese patent CN201711091105, distilled water with a certain temperature (60 ℃) and a certain amount of salt (K2 SO 4) particles are mixed to prepare saturated solution under a certain temperature condition, then the saturated salt solution is poured into a glass vacuum vessel and is restored to room temperature, finally, an environment with a certain relative humidity is formed, and then the vacuum vessel filled with the saturated salt solution is communicated with a testing tank filled with the coal samples, SO that the coal samples adsorb water, and further, the tested coal samples with different water contents are obtained.
In summary, the two methods for preparing the coal sample with the water content can accurately obtain the water content of the coal sample at the beginning of the test, but the water content of the coal sample is changed along with the change of the test conditions. For example, the moisture of the coal sample in the test tank changes along with the increase of the adsorption/desorption time and the change of the adsorption/desorption temperature, and particularly, under the high-temperature condition, liquid water molecules in the coal sample gradually vaporize, so that the error of the gas quantity test result of the coal body is larger. Therefore, the two methods cannot ensure that the moisture in the coal sample is kept at a certain fixed value during the whole test.
Disclosure of Invention
Accordingly, the present invention is directed to a gas adsorption/desorption characteristic test device and a test method thereof, which have a simple structure and a simple test method, and can effectively control adsorption of water-bearing coal samples.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the gas-containing coal high-pressure adsorption/desorption test device capable of controlling the moisture comprises a vacuumizing system, an inflating system, a constant-temperature system and a gas adsorption/desorption test system capable of controlling the moisture;
the vacuum pumping system comprises a vacuum pump, a vacuum gauge and a vacuum pipeline which are connected with the vacuum pump, and a first valve connected with the vacuum pipeline; a vacuum gauge is arranged on the vacuum pump; one side of the vacuum pump is connected with a vacuum pipeline, and a first valve is arranged at the tail end of the vacuum pipeline; one end of the first valve is connected with the vacuum pipeline, and the other end of the first valve is connected with the fourth high-pressure tee joint;
the inflation system comprises a high-pressure helium inflation system and a high-pressure methane inflation system; the helium gas charging system comprises a high-pressure helium bottle, a first pressure reducing valve and a first high-precision pressure sensor; the high-pressure helium bottle, the first pressure reducing valve and the first high-precision pressure sensor are connected by high-pressure pipelines in sequence, and finally reach a first high-pressure tee joint; the methane inflation system comprises a high-pressure methane cylinder, a pressure reducing valve and a second high-precision pressure sensor; the high-pressure methane cylinder, the second pressure reducing valve and the second high-precision pressure sensor are sequentially connected by using a high-pressure pipeline, and finally reach a first high-pressure tee joint; the first high-pressure tee joint first air passage is connected with a helium gas charging system; the second gas circuit is connected with a methane inflation system; the third air passage is connected with the second high-pressure tee joint; the second high-pressure tee joint is connected with the first high-pressure tee joint through a first air passage; the second gas circuit is connected with a second valve and finally led into the control moisture reference tank; the third gas circuit is connected with a third high-precision pressure sensor; the third high-precision pressure sensor is connected with a third high-pressure tee joint; the third high-pressure tee joint first air passage is connected with the third high-precision pressure sensor; the second gas circuit is connected with a third valve and finally leads to the controlled moisture test tank; the third air passage is connected with a fourth high-pressure tee joint; the fourth high-pressure tee joint is connected with the third high-pressure tee joint through a first gas path, and the second gas path is connected with the first valve and enters a vacuum system; the third air passage is connected with a fourth valve and finally leads to the atmosphere;
the constant-temperature water bath system comprises a constant-temperature water tank and a circulating water system; the constant temperature water tank comprises a tank, a heating pipe, a temperature sensor, a temperature regulator and a partition plate; the temperature regulator is arranged outside the tank body and is connected with the heating pipe and the temperature sensor through wires so as to control the temperature; the partition board is arranged at the lower part of the tank body and used for managing and separating the tank body, the heating pipe and the temperature sensor are arranged below the partition board, and the control moisture reference tank and the control moisture test tank are arranged on the partition board; the circulating water system consists of a water circulating pump and a circulating pipeline; the constant-temperature water bath system comprises 2 water circulation pumps and circulation pipelines which are respectively arranged at the deep part and the shallow part of the two sides of the tank body to form uniform and stable water bath temperature;
the gas adsorption/desorption testing system for controlling the moisture comprises two control moisture reference tanks and a control moisture testing tank, wherein the two control moisture reference tanks and the control moisture testing tank have the same structure and the same volume, the second valve, the third valve, the fifth valve, a fifth high-pressure tee joint, a high-temperature high-pressure hygrometer, a measuring cylinder and a conical flask, and the third high-precision pressure sensor; the control moisture reference tank is arranged on the clamping plate, the upper part of the control moisture reference tank is connected with a second valve, and the second valve is connected with the second high-pressure tee joint; the control moisture testing tank is also arranged on the clamping plate, the control moisture testing tank is connected with the fifth high-pressure tee joint first air passage, the fifth high-pressure tee joint second air passage is connected with a third valve, and the third valve is connected with the third high-pressure tee joint second air passage; the third gas circuit of the fifth high-pressure tee joint is connected with a high-pressure high-temperature hygrothermograph, the high-pressure high-temperature hygrothermograph is connected with the fifth valve, the fifth valve is connected with the measuring cylinder, and the measuring cylinder is connected with the conical flask;
the control moisture reference tank and the control moisture test tank are two test tank bodies with the same structure and the same volume; regarding structural composition analysis of the tank body, taking a control moisture test tank as an example for analysis; the control moisture test tank comprises a base, a saturated saline solution storage cavity, a limiting device, a screen device, a coal sample test cavity, a tank sealing cover body, a high-pressure air inlet and outlet, a first sealing ring and a second sealing ring; the bottom of the control moisture test tank is provided with the base and is placed on the clamping plate; the saturated saline solution storage cavity is arranged at the upper part of the base; the upper part of the saturated saline solution storage cavity is provided with a limiting device protruding inwards, and a detachable filtering device is arranged above the limiting groove; the upper part of the saturated saline solution storage cavity is provided with a first sealing ring; a coal sample testing cavity is arranged above the first sealing ring; the upper part of the saturated saline solution storage cavity is connected with the coal sample testing cavity by bolts; a second sealing ring is arranged at the top of the coal sample testing cavity, a tank sealing cover body is arranged at the upper end of the second sealing ring, and a high-pressure air inlet and outlet port is arranged in the middle of the tank sealing cover body; the upper part of the coal sample testing cavity is connected with the sealing cover of the tank body by bolts.
The testing method based on the device comprises the following steps:
(a) Sample preparation; crushing raw coal, and screening test coal dust by using a screen; particularly, because the water test tank is controlled to be provided with the screen, the mesh number of the coal powder for the test is required to be larger than that of the screen in the water test tank, so that the coal powder is prevented from falling into the saline solution in the test process, and the test precision is prevented from being influenced;
(2) Preparing and placing saturated salt solution; according to the test conditions to be developed, selecting proper inorganic salt particles, mixing distilled water with a certain temperature and a certain amount of inorganic salt particles to prepare saturated inorganic salt solution, pouring the saturated inorganic salt solution into a saturated salt solution storage cavity in a water control reference tank and a water control test tank, arranging a filtering device at the upper part of the tank body, and finally screwing bolts between the saturated salt solution storage cavity of the test tank and a coal sample test cavity;
(3) Placing a test sample; placing coal dust with certain mass into a coal sample testing cavity of a control moisture testing tank, controlling the moisture reference tank to be free from adding a test coal sample, and screwing down bolts; then placing the reference tank and the test tank on a constant-temperature water bath clamping plate, and finally connecting each gas pipeline;
(4) Detecting air tightness; connecting all test related pipelines, and placing the tank body on a clamping plate of a constant-temperature water tank; closing the first valve, the fourth valve and the fifth valve, opening the second valve and the third valve, then opening the high-pressure helium bottle and the first pressure reducing valve to charge high-pressure helium gas of about 7MPa into the test system; closing the first pressure reducing valve after a period of time, and observing the pressure change condition of the high-precision pressure gauge; after the gas tightness test is finished, closing the high-pressure helium bottle and the first pressure reducing valve, opening the fourth valve, and discharging helium in the system;
(5) Thermostatic water bath; adding water into a water tank provided with a tank body, and stopping adding water only by completely submerging the test tank; setting the water bath temperature and starting a circulating water pump;
(6) Vacuum degassing; after the water bath temperature reaches the set temperature for a certain time, closing the fourth valve, opening the first valve, opening the vacuum pump, and vacuumizing the system; when the vacuum degree reaches below 4.0Pa, the vacuum state is still maintained for a certain time;
(7) Opening a high-pressure helium bottle and a first pressure reducing valve, slowly filling helium with the pressure of about 3MPa into a reference tank, closing the high-pressure helium bottle and the first pressure reducing valve, recording the reading of a third high-precision pressure gauge, slowly opening the third valve to enable gas to enter a coal sample tank, recording again after the reading of the high-precision pressure gauge is stable, and calculating the free volume of the coal sample tank;
(8) Opening a fourth valve, and discharging helium in the test system; then closing the fourth valve, opening the first valve, the second valve and the third valve, and starting the vacuum pump to perform a second vacuumizing operation on the test system, and keeping the vacuumizing state for more than 3 hours when the vacuum degree is below 4.0 Pa;
(9) Sequentially closing the first valve and the vacuum pump, then monitoring and controlling the humidity in the moisture test tank by using a high-temperature high-pressure humidity sensor, and controlling the time for the coal sample in the moisture test tank to adsorb moisture to be not less than 5 days, so that the coal sample is ensured to fully adsorb moisture;
(10) Closing a third valve, opening a high-pressure methane cylinder and a second pressure reducing valve to enable methane gas with certain pressure to enter a moisture control reference tank, closing the high-pressure methane cylinder and the second pressure reducing valve, and recording data of a third high-precision pressure sensor;
(11) Slowly opening a third valve, allowing methane gas in a water control reference tank to enter a water control test tank, enabling methane gas and a certain water coal sample to be adsorbed, recording relevant pressure data after 12 hours of adsorption balance and when the data of a third high-precision pressure sensor are unchanged, then calculating methane adsorption quantity under the adsorption balance pressure condition according to pressure change values before and after adsorption and the volume test value, and then closing the third valve;
(12) Opening a high-pressure methane cylinder and a second pressure reducing valve, increasing the pressure of the adsorbed gas step by step, and sequentially repeating the steps (10) - (11) to draw a coal adsorption gas curve under certain temperature and moisture conditions;
(13) After the adsorption test is completed, the second valve is closed, the fifth valve is opened, a certain amount of methane gas is released, the fifth valve is closed, and the volume of the released methane gas is measured by using a measuring cylinder and a conical flask; then, the coal sample and the gas in the water control adsorption tank are re-adsorbed at the same time, the adsorption time is not less than 12 hours, and the pressure value after adsorption balance is recorded by using a third high-precision pressure gauge;
(14) Repeating the step (13), and gradually releasing the water to control methane gas in the test tank to obtain a coal desorption gas curve under certain temperature and humidity conditions;
(15) When the next temperature level test is carried out, the steps (9) to (14) are sequentially repeated, so that a coal body adsorption/desorption gas curve under certain moisture and different temperature conditions is obtained;
(16) When the next moisture level test is performed, appropriate inorganic salt particles are selected according to the desired moisture conditions, and then the above steps (2) to (15) are repeated.
Further, the suitable inorganic salt particles satisfy: when the test moisture was 20%, sodium chloride inorganic salt particles were selected.
The invention has the beneficial effects that: the controllable moisture test tank successfully solves the problem that moisture in a coal body changes due to overlong test time or change of test conditions and the like by utilizing the principle that the saturated inorganic salt solution keeps the humidity of a closed space. The invention comprises a vacuumizing system, an inflating system, a constant temperature system and a gas adsorption/desorption testing system for controlling moisture, and has the advantages of simple integral structure, convenient operation, obvious use effect and lower cost.
Drawings
In order to make the objects, technical solutions and advantageous effects of the present invention more clear, the present invention provides the following drawings for description:
FIG. 1 is a schematic diagram of a device for testing high-pressure adsorption/desorption of gas-containing coal with controllable moisture;
FIG. 2 is a schematic diagram of a device for controlling the moisture content of a reference tank;
reference numerals: 1-a vacuum pump; 2-a vacuum gauge; 3-a vacuum pipeline; 4-a high pressure helium bottle; 5-high pressure methane gas cylinder; 6-a first pressure reducing valve; 7-a second pressure reducing valve; 8-a high-pressure pipeline; 9-a first high-precision pressure sensor; 10-a second high-precision pressure sensor; 11-a first high pressure tee; 12-a second high-pressure tee; 13-a third high pressure tee; 14-a fourth high pressure tee; 15-a fifth high pressure tee; 16-a groove body; 17-heating the pipe; 18-a temperature sensor; 19-a temperature regulator; 20-a separator; 21-a water circulation pump; 22-a circulation pipeline; 23-controlling a moisture reference tank; 24-controlling a moisture test tank; 25-a high-temperature high-pressure hygrometer; 26-measuring cylinder; 27-conical flask; 28-a third high-precision pressure sensor; f1-a first valve; f2-a second valve; f3-a third valve; f4—fourth valve; f5—fifth valve; 231-base; 232-a saturated saline storage chamber; 233-a limiting device; 234-a screen device; 235-coal sample testing cavity; 236-sealing the cover of the tank; 237-high pressure air inlet and outlet; 238-a first seal ring; 239-second sealing ring.
Detailed Description
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in FIG. 1, the gas-containing coal high-pressure adsorption/desorption test device under the condition of controllable moisture comprises a vacuumizing system, an aerating system, a constant-temperature system and a gas adsorption/desorption test system for controlling the moisture.
The vacuumizing system comprises a vacuum pump 1, a vacuum gauge 2 and a vacuum pipeline 3 which are connected with the vacuum pump, and a first valve F1 which is connected with the vacuum pipeline 3. The vacuum pump 1 is provided with a vacuum gauge 2; one side of the vacuum pump is connected with a vacuum pipeline 3, and a first valve F1 is arranged at the tail end of the vacuum pipeline; one end of the first valve F1 is connected with the vacuum pipeline 3, and the other end is connected with the fourth high-pressure tee joint 14. The vacuumizing system is used for vacuumizing and degassing the whole system.
The inflation system comprises a high pressure helium inflation system and a high pressure methane inflation system. The helium gas charging system mainly comprises a high-pressure helium bottle 4, a first pressure reducing valve 6 and a first high-precision pressure sensor 9. The high-pressure helium bottle 4, the first pressure reducing valve 6 and the first high-precision pressure sensor 9 are sequentially connected by a high-pressure pipeline 8 and finally reach a first high-pressure tee joint 11. The methane gas charging system mainly comprises a high-pressure methane cylinder 5, a pressure reducing valve 7 and a second high-precision pressure sensor 10. The high-pressure methane cylinder 5, the second pressure reducing valve 7 and the second high-precision pressure sensor 10 are sequentially connected by a high-pressure pipeline 8 and finally reach a first high-pressure tee joint 11. The first high-pressure tee 11 is connected with a helium gas charging system through a first gas path; the second gas circuit is connected with a methane inflation system; the third gas path is connected to the second high pressure tee 12. The first gas path of the second high-pressure tee 12 is connected with the first high-pressure tee 11; the second gas circuit is connected with a second valve F2 and finally leads to the control moisture reference tank 23; the third air path is connected to a third high accuracy pressure sensor 28. The third high-precision pressure sensor 28 is connected to the third high-pressure tee 13. The first air path of the third high-pressure tee 13 is connected with a third high-precision pressure sensor 28; the second air path is connected with a third valve F3 and finally leads to the control moisture test tank 24; the third air path is connected with a fourth high-pressure tee 14. The fourth high-pressure tee 14 is connected with the third high-pressure tee 13 through a first air passage, and the second air passage is connected with the first valve F1 and enters a vacuum system; the third air path is connected with a fourth valve F4 and finally leads to the atmosphere. The inflation system is used for providing test gases at different pressures.
The constant temperature water bath system comprises a constant temperature water tank and a circulating water system. The constant temperature water tank mainly comprises a tank body 16, a heating pipe 17, a temperature sensor 18, a temperature regulator 19 and a partition plate 20. The temperature regulator 19 is arranged outside the tank body 16 and is connected with the heating pipe 17 and the temperature sensor 19 through wires so as to control the temperature; a partition plate 20 is disposed at a lower portion of the tank body 16 for managing the partitioned tank body 16, and a heating pipe 17 and a temperature sensor 18 are disposed below the partition plate 20, and a control moisture reference tank 23 and a control moisture test tank 24 are disposed above the partition plate 20. The circulating water system mainly comprises a water circulating pump 21 and a circulating pipeline 22. The constant-temperature water bath system comprises 2 water circulation pumps 21 and circulation pipelines 22 which are respectively arranged at the deep part and the shallow part at two sides of the tank body 16 to form uniform and stable water bath temperature. The thermostatic waterbath system was used to provide different simulated temperatures for the test.
The gas adsorption/desorption test system for controlling the moisture mainly comprises two control moisture reference tanks 23, a control moisture test tank 24, a second valve F2, a third valve F3, a fifth valve F5, a fifth high-pressure tee 15, a high-temperature high-pressure hygrometer 25, a measuring cylinder 26, a conical flask 27 and a third high-precision pressure sensor 28, wherein the two control moisture reference tanks 23 and the control moisture test tank have the same structure and the same volume. A control moisture reference tank 23 is placed on the clamping plate 20, and the upper part of the control moisture reference tank 23 is connected with a second valve F2, and the second valve F2 is connected with a second high-pressure tee 12. The control moisture test tank 24 is also arranged on the clamping plate 20, the control moisture test tank 24 is connected with a first air passage of the fifth high-pressure tee 15, a second air passage of the fifth high-pressure tee 15 is connected with a third valve F3, and the third valve F3 is connected with a second air passage of the third high-pressure tee 13; the third air path of the fifth high-pressure tee 15 is connected with a high-temperature high-pressure hygrometer 26, the high-temperature high-pressure hygrometer 26 is connected with a fifth valve F5, the fifth valve F5 is connected with a measuring cylinder 26, and the measuring cylinder 26 is connected with a conical flask 27. The gas adsorption/desorption test system for controlling the moisture utilizes the principle that saturated salt solution is used for adjusting the moisture in the closed space, and different humidity conditions are provided for the test by selecting different saturated salt solutions.
The control moisture reference tank 23 and the control moisture test tank 24 are two test tanks with the same structure and the same volume. With respect to the structural composition analysis of the tank body, the control moisture test tank 23 will be described as an example. The control moisture test tank 23 mainly comprises a base 231, a saturated salt solution storage cavity 232, a limiting device 233, a screen device 234, a coal sample test cavity 235, a tank sealing cover 236, a high-pressure air inlet and outlet 237, a first sealing ring 238 and a second sealing ring 239. The bottom of the control moisture test tank 23 is a base 231 which is placed on the clamping plate 20; a saturated saline solution storing cavity 232 is arranged at the upper part of the base 231; the upper part of the saturated saline solution storage cavity 232 is provided with a limiting device 233 protruding inwards, and a detachable filter device 234 is arranged above the limiting groove 233; a first sealing ring 238 is arranged at the upper part of the saturated saline solution storing cavity 232; a coal sample testing cavity 235 is arranged above the first sealing ring 238; the upper part of the saturated saline solution storage cavity 232 is connected with the coal sample testing cavity 235 by bolts; a second sealing ring 239 is arranged at the top of the coal sample testing cavity 235, a tank sealing cover 236 is arranged at the upper end of the second sealing ring 239, and a high-pressure air inlet and outlet 237 is arranged in the middle of the tank sealing cover 236; the upper part of the coal sample testing cavity 234 is connected with a tank sealing cover 235 by bolts.
The test method of the gas-containing coal high-pressure adsorption/desorption test device capable of controlling the moisture comprises the following steps of:
(a) And (5) preparing a sample. Crushing raw coal, and screening test coal dust by using a screen. It is particularly noted that since the control moisture test tank is provided with the screen, the mesh number of the test coal dust is required to be larger than that of the screen in the control moisture test tank, so that the coal dust is prevented from falling into the saline solution in the test process, and the test accuracy is prevented from being influenced.
(2) Preparing and placing saturated salt solution. According to the test conditions to be developed, appropriate inorganic salt particles (for example, sodium chloride inorganic salt particles may be selected when the test moisture is about 20%), distilled water at a certain temperature and a certain amount of inorganic salt particles are mixed to prepare a saturated inorganic salt solution, then the saturated inorganic salt solution is poured into the saturated salt solution storage cavities in the control moisture reference tank 23 and the control moisture test tank 24, and a screen device is placed on the upper portion of the tank body, and finally the bolts are screwed.
(3) And (5) placing a test sample. And (3) placing coal dust with a certain mass into a coal sample testing cavity of the control moisture testing tank 24, wherein a test coal sample is not added into the control moisture reference tank 23, and screwing down a bolt. The reference and test tanks were then placed on the thermostatic waterbath partition 20 and finally connected to each gas line.
(4) And (5) detecting air tightness. Connecting all test related pipelines, closing a first valve F1, a fourth valve F4 and a fifth valve F5, opening a second valve F2 and a third valve F3, and then opening a high-pressure helium bottle 4 and a first pressure reducing valve 6 to charge high-pressure helium of about 7MPa into a test system. After a period of time, the first pressure reducing valve 6 is closed, and the pressure change condition of the first high-precision pressure sensor 9 is observed. After the airtight test is completed, the fourth valve F4 is opened to discharge helium gas in the system.
(5) And (5) temperature control. Adding water to the water tank 16 with the tanks 23 and 24, the water must completely submerge the reference tank 23 and the test tank 24 to stop adding water; the water bath temperature is set by the temperature regulator 19, and the circulating water pump 21 is started.
(6) And (5) vacuum degassing. After the water bath temperature reaches the set temperature for a certain time, closing a fourth valve F4, opening a first valve F1, starting a vacuum pump 1, and vacuumizing the system; and when the vacuum degree is below 4.0Pa, the vacuum state is still maintained for a certain time.
(7) Free volume calculation. The high-pressure helium bottle 4 and the first pressure reducing valve 6 are opened, the reference tank 23 is slowly filled with helium of about 3MPa, the high-pressure helium bottle 4 and the first pressure reducing valve 6 are closed, the reading of the third high-precision pressure sensor 28 is recorded, then the third valve F3 is slowly opened, the gas enters the control moisture test tank 24, the reading of the third high-precision pressure sensor 28 is recorded again after being stabilized, and the free volume of the control moisture test tank 24 can be calculated.
(8) And (5) vacuumizing for the second time. Opening a fourth valve F4, and discharging helium in the test system; and then closing the fourth valve F4, opening the first valve F1, the second valve F2 and the third valve F3, and starting the vacuum pump 1 to perform a second vacuumizing operation on the test system, and keeping the vacuumizing state for more than 3 hours when the vacuum degree is below 4.0 Pa.
(9) And (5) moisture adsorption. The first valve F1 and the vacuum pump 1 are sequentially closed, then the humidity in the moisture test tank is monitored and controlled by the high-temperature high-pressure humidity sensor 25, the time for the coal sample in the moisture test tank 24 to adsorb the moisture is controlled not to be lower than 5 days, and the coal sample is ensured to fully adsorb the moisture.
(10) The third valve F3 is closed, the high-pressure methane gas cylinder 5 and the second pressure reducing valve 7 are opened, methane gas of a certain pressure is made to enter the moisture control reference tank 23, then the high-pressure methane gas cylinder 5 and the second pressure reducing valve 7 are closed, and data of the third high-accuracy pressure sensor 28 are recorded.
(11) And slowly opening a third valve F3, allowing methane gas in the water control reference tank 23 to enter the water control test tank 24, adsorbing the methane gas and a certain water coal sample, recording relevant pressure data after 12 hours of adsorption balance and when the pressure data of the third high-precision pressure sensor 28 is unchanged, then calculating the methane adsorption quantity under the adsorption balance pressure according to the pressure change values before and after adsorption and the volume test value, and then closing the third valve F3.
(12) And (3) opening the high-pressure methane cylinder 5 and the second pressure reducing valve 7, increasing the pressure of the adsorbed gas step by step, and sequentially repeating the steps (10) - (11), so that a coal adsorption gas curve under certain temperature and moisture conditions can be drawn.
(13) After the adsorption test is completed, the second valve F2 is closed, the fifth valve F5 is opened, and after a certain amount of methane gas is released, the fifth valve F5 is closed, and the volume of released methane gas is measured by using the measuring cylinder 26 and the conical flask 27. And then the coal sample and the gas in the moisture control adsorption tank 24 are re-adsorbed at the same time, the adsorption time is not less than 12 hours, and the pressure value after adsorption balance is recorded by using the third high-precision pressure sensor 28.
(14) And (3) repeating the step (13) to release the methane gas in the water control test tank 24 step by step, and obtaining a coal desorption gas curve under certain temperature and humidity conditions.
(15) And (3) when the next temperature grade test is carried out, repeating the steps (9) - (14) in sequence, and further obtaining the coal adsorption/desorption gas curve under certain moisture and different temperature conditions.
(16) When the next moisture level test is performed, appropriate inorganic salt particles are selected according to the desired moisture conditions, and then the above steps (2) to (15) are repeated.
The invention changes the water content in the coal sample by controlling the adsorption/desorption system of the water to select different saturated salt solutions; and the method can ensure that the test conditions are constant at a certain time, and the influence of volatilization of the water on the test result due to the extension of the test time is successfully avoided. The invention can study the influence of coal samples on the gas adsorption/desorption characteristics of different moisture contents, can better reflect the gas adsorption/desorption evolution law of an original coal seam, especially a high-water-content coal seam, is beneficial to the effective prevention and control of coal seam gas disasters, is beneficial to the development and utilization of coal seam gas resources, and has the advantages of simple integral structure, convenient operation, obvious use effect and lower cost.
Finally, it is noted that the above-mentioned preferred embodiments are only intended to illustrate rather than limit the invention, and that, although the invention has been described in detail by means of the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the invention as defined by the appended claims.
Claims (1)
1. The method for testing the high-pressure adsorption/desorption of the gas-containing coal with controllable moisture is characterized by comprising the following steps of: the adopted test device comprises a vacuumizing system, an inflating system, a constant temperature system and a gas adsorption/desorption test system for controlling moisture;
the vacuum pumping system comprises a vacuum pump, a vacuum gauge and a vacuum pipeline which are connected with the vacuum pump, and a first valve connected with the vacuum pipeline; a vacuum gauge is arranged on the vacuum pump; one side of the vacuum pump is connected with a vacuum pipeline, and a first valve is arranged at the tail end of the vacuum pipeline; one end of the first valve is connected with the vacuum pipeline, and the other end of the first valve is connected with the fourth high-pressure tee joint;
the inflation system comprises a high-pressure helium inflation system and a high-pressure methane inflation system; the helium gas charging system comprises a high-pressure helium bottle, a first pressure reducing valve and a first high-precision pressure sensor; the high-pressure helium bottle, the first pressure reducing valve and the first high-precision pressure sensor are connected by high-pressure pipelines in sequence, and finally reach a first high-pressure tee joint; the high-pressure methane inflation system comprises a high-pressure methane cylinder, a second pressure reducing valve and a second high-precision pressure sensor; the high-pressure methane cylinder, the second pressure reducing valve and the second high-precision pressure sensor are sequentially connected by using a high-pressure pipeline, and finally reach a first high-pressure tee joint; the first high-pressure tee joint first air passage is connected with a high-pressure helium gas charging system; the second gas circuit is connected with a high-pressure methane inflation system; the third air passage is connected with the second high-pressure tee joint; the second high-pressure tee joint is connected with the first high-pressure tee joint through a first air passage; the second gas circuit is connected with a second valve and finally led into the control moisture reference tank; the third gas circuit is connected with a third high-precision pressure sensor; the third high-precision pressure sensor is connected with a third high-pressure tee joint; the third high-pressure tee joint first air passage is connected with the third high-precision pressure sensor; the second gas circuit is connected with a third valve and finally leads to the controlled moisture test tank; the third air passage is connected with a fourth high-pressure tee joint; the fourth high-pressure tee joint is connected with the third high-pressure tee joint through a first gas path, and a second gas path is connected with the first valve and enters a vacuumizing system; the third air passage is connected with a fourth valve and finally leads to the atmosphere;
the constant temperature system comprises a constant temperature water tank and a circulating water system; the constant temperature water tank comprises a tank, a heating pipe, a temperature sensor, a temperature regulator and a partition plate; the temperature regulator is arranged outside the tank body and is connected with the heating pipe and the temperature sensor through wires so as to control the temperature; the partition board is arranged at the lower part of the tank body and used for managing and separating the tank body, the heating pipe and the temperature sensor are arranged below the partition board, and the control moisture reference tank and the control moisture test tank are arranged above the partition board; the circulating water system consists of a water circulating pump and a circulating pipeline; the constant temperature system comprises 2 water circulation pumps and circulation pipelines which are respectively arranged at the deep part and the shallow part of the two sides of the tank body to form uniform and stable water bath temperature;
the gas adsorption/desorption testing system for controlling the moisture comprises two control moisture reference tanks, a control moisture testing tank, a second valve, a third valve, a fifth high-pressure tee joint, a high-temperature high-pressure hygrometer, a measuring cylinder, a conical flask and a third high-precision pressure sensor, wherein the two control moisture reference tanks have the same structure and the same volume; the control moisture reference tank is arranged on the partition board, the upper part of the control moisture reference tank is connected with a second valve, and the second valve is connected with the second high-pressure tee joint; the control moisture testing tank is also arranged on the partition board, the control moisture testing tank is connected with the first air passage of the fifth high-pressure tee joint, the second air passage of the fifth high-pressure tee joint is connected with a third valve, and the third valve is connected with the second air passage of the third high-pressure tee joint; the third gas circuit of the fifth high-pressure tee joint is connected with a high-temperature high-pressure hygrometer, the high-temperature high-pressure hygrometer is connected with the fifth valve, the fifth valve is connected with the measuring cylinder, and the measuring cylinder is connected with the conical flask;
the control moisture reference tank and the control moisture test tank are two test tank bodies with the same structure and the same volume; regarding structural composition analysis of the test tank body, taking a control moisture test tank as an example for analysis; the control moisture test tank comprises a base, a saturated saline solution storage cavity, a limiting device, a screen device, a coal sample test cavity, a tank sealing cover body, a high-pressure air inlet and outlet, a first sealing ring and a second sealing ring; the bottom of the control moisture test tank is provided with the base and is placed on the partition board; the saturated saline solution storage cavity is arranged at the upper part of the base; the upper part of the saturated saline solution storage cavity is provided with a limiting device protruding inwards, and a detachable screen device is arranged above the limiting device; the upper part of the saturated saline solution storage cavity is provided with a first sealing ring; a coal sample testing cavity is arranged above the first sealing ring; the upper part of the saturated saline solution storage cavity is connected with the coal sample testing cavity by bolts; a second sealing ring is arranged at the top of the coal sample testing cavity, a tank sealing cover body is arranged at the upper end of the second sealing ring, and a high-pressure air inlet and outlet port is arranged in the middle of the tank sealing cover body; the upper part of the coal sample testing cavity is connected with the sealing cover of the tank body by bolts;
the testing method based on the device comprises the following steps:
(1) Sample preparation; crushing raw coal, and screening test coal dust by using a screen; particularly, because the water test tank is controlled to be provided with the screen, the mesh number of the coal powder for the test is required to be larger than that of the screen in the water test tank, so that the coal powder is prevented from falling into the saline solution in the test process, and the test precision is prevented from being influenced;
(2) Preparing and placing saturated salt solution; according to the test conditions to be developed, selecting proper inorganic salt particles, mixing distilled water with a certain temperature and a certain amount of inorganic salt particles to prepare saturated inorganic salt solution, pouring the saturated inorganic salt solution into a saturated salt solution storage cavity in a water control reference tank and a water control test tank, arranging a screen device at the upper part of the tank body, and finally screwing bolts between the saturated salt solution storage cavity of the test tank and a coal sample test cavity;
(3) Placing a test sample; placing coal dust with certain mass into a coal sample testing cavity of a control moisture testing tank, controlling the moisture reference tank to be free from adding a test coal sample, and screwing down bolts; then placing the reference tank and the test tank on a partition board of a constant temperature system, and finally connecting each gas pipeline;
(4) Detecting air tightness; connecting all test related pipelines, and placing the tank body on a partition plate of a constant-temperature water tank; closing the first valve, the fourth valve and the fifth valve, opening the second valve and the third valve, then opening the high-pressure helium bottle and the first pressure reducing valve to charge 7MPa of high-pressure helium into the test system; closing the first pressure reducing valve, and observing the pressure change condition of the high-precision pressure gauge; after the air tightness test is finished, closing the high-pressure helium bottle and the first pressure reducing valve, opening the fourth valve, and discharging helium in the system;
(5) Thermostatic water bath; adding water into a water tank provided with a tank body, and stopping adding water only by completely submerging the test tank; setting the water bath temperature and starting a water circulation pump;
(6) Vacuum degassing; after the water bath temperature reaches the set temperature for a certain time, closing the fourth valve, opening the first valve, opening the vacuum pump, and vacuumizing the system; when the vacuum degree reaches below 4.0Pa, the vacuum state is still maintained for a certain time;
(7) Opening a high-pressure helium bottle and a first pressure reducing valve, slowly filling helium of 3MPa into a reference tank, closing the high-pressure helium bottle and the first pressure reducing valve, recording the reading of a third high-precision pressure gauge, then slowly opening the third valve to enable gas to enter a coal sample testing cavity, recording again after the reading of the high-precision pressure gauge is stable, and calculating the free volume of the coal sample testing cavity;
(8) Opening a fourth valve, and discharging helium in the test system; then closing the fourth valve, opening the first valve, the second valve and the third valve, and starting the vacuum pump to perform a second vacuumizing operation on the test system, and keeping the vacuumizing state for more than 3 hours when the vacuum degree is below 4.0 Pa;
(9) Sequentially closing the first valve and the vacuum pump, then monitoring and controlling the humidity in the moisture test tank by using a high-temperature high-pressure hygrometer, and controlling the time for the coal sample in the moisture test tank to adsorb moisture to be not less than 5 days, so that the coal sample is ensured to fully adsorb moisture;
(10) Closing a third valve, opening a high-pressure methane cylinder and a second pressure reducing valve, enabling methane gas with certain pressure to enter a control moisture reference tank, closing the high-pressure methane cylinder and the second pressure reducing valve, and recording data of a third high-precision pressure sensor;
(11) Slowly opening a third valve, allowing methane gas in a control moisture reference tank to enter a control moisture test tank, enabling methane gas and a certain moisture coal sample to be adsorbed, recording relevant pressure data after 12 hours of adsorption balance and when the data of a third high-precision pressure sensor are unchanged, then calculating methane adsorption quantity under the condition of the adsorption balance pressure according to pressure change values before and after adsorption and the volume test value, and then closing the third valve;
(12) Opening a high-pressure methane cylinder and a second pressure reducing valve, increasing the pressure of the adsorbed gas step by step, and sequentially repeating the steps (10) - (11), and drawing a coal adsorption gas curve under certain temperature and moisture conditions;
(13) After the adsorption test is completed, the second valve is closed, the fifth valve is opened, a certain amount of methane gas is released, the fifth valve is closed, and the volume of the released methane gas is measured by using a measuring cylinder and a conical flask; then, the coal sample and the gas in the water test tank are controlled to be re-adsorbed at the same time, the adsorption time is not less than 12 hours, and the pressure value after adsorption balance is recorded by using a third high-precision pressure gauge;
(14) Repeating the step (13), and gradually releasing and controlling methane gas in the water test tank to obtain a coal desorption gas curve under certain temperature and humidity conditions;
(15) When the next temperature level test is carried out, repeating the steps (9) - (14) in sequence, so as to obtain a coal adsorption/desorption gas curve under certain moisture and different temperature conditions;
(16) Selecting proper inorganic salt particles according to the required moisture conditions when the next moisture level test is carried out, and repeating the steps (2) - (15);
the suitable inorganic salt particles satisfy: when the test moisture was 20%, sodium chloride inorganic salt particles were selected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910020382.7A CN109540734B (en) | 2019-01-09 | 2019-01-09 | Gas-containing coal high-pressure adsorption/desorption test device and method capable of controlling moisture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910020382.7A CN109540734B (en) | 2019-01-09 | 2019-01-09 | Gas-containing coal high-pressure adsorption/desorption test device and method capable of controlling moisture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109540734A CN109540734A (en) | 2019-03-29 |
| CN109540734B true CN109540734B (en) | 2023-11-24 |
Family
ID=65834796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910020382.7A Active CN109540734B (en) | 2019-01-09 | 2019-01-09 | Gas-containing coal high-pressure adsorption/desorption test device and method capable of controlling moisture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109540734B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110161083B (en) * | 2019-06-12 | 2023-12-22 | 河南理工大学 | System and method for distributing water in gas-containing coal imbibition process under test overburden condition |
| CN110849767B (en) * | 2019-11-11 | 2022-02-22 | 太原理工大学 | Device and method for measuring gas desorption capacity of solution in coal body |
| CN111458260B (en) * | 2020-05-26 | 2022-08-30 | 中煤科工集团重庆研究院有限公司 | Coal gas desorption rule determination device, system and method |
| CN111648817B (en) * | 2020-06-11 | 2022-03-22 | 中煤科工集团重庆研究院有限公司 | Coal sample gas desorption device simulating temperature and pressure change and measurement method |
| CN113358328A (en) * | 2021-06-16 | 2021-09-07 | 中国科学院力学研究所 | Realize controllable circulating water tank experimental apparatus of solution saturation |
| CN113176175B (en) * | 2021-06-23 | 2021-09-28 | 中国矿业大学(北京) | Coal sample gas constant-pressure adsorption and desorption rate test method |
| CN113640174A (en) * | 2021-06-30 | 2021-11-12 | 中煤科工集团沈阳研究院有限公司 | Coal gas adsorption desorption heating oxidation coupling experiment platform and experiment method thereof |
| CN113358519A (en) * | 2021-08-10 | 2021-09-07 | 贝士德仪器科技(北京)有限公司 | High-pressure gas adsorption instrument with oil bath thermostat |
| CN114324057A (en) * | 2021-12-13 | 2022-04-12 | 西安科技大学 | Experiment system and method for monitoring liquid nitrogen temperature control coal gas adsorption and desorption in real time |
Citations (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6232341A (en) * | 1985-08-05 | 1987-02-12 | Daikin Ind Ltd | Inspection method for moisture content inside container |
| JPH11218510A (en) * | 1998-02-02 | 1999-08-10 | Asaga Akio | Constant-humidity generation apparatus |
| WO2002031469A1 (en) * | 2000-08-10 | 2002-04-18 | Rupprecht & Patashnick Company, Inc. | Exhaust gas particulate mass measurement apparatus with real-time moisture monitor |
| JP2008089564A (en) * | 2006-09-07 | 2008-04-17 | Fujitsu Ltd | Method and device for testing corrosion |
| CN102053141A (en) * | 2010-12-09 | 2011-05-11 | 中国矿业大学 | Device and method for testing influence of externally added water on desorption characteristic of gas-containing coal body |
| CN103018132A (en) * | 2012-12-21 | 2013-04-03 | 中煤科工集团重庆研究院 | Dynamic deformation characteristic testing method in coal absorption and desorption process |
| CN203112812U (en) * | 2013-01-30 | 2013-08-07 | 贵州大学 | Humidor for controlling generation or germination of plant pathogenic fungal spores |
| CN103954490A (en) * | 2014-05-15 | 2014-07-30 | 山东科技大学 | Indoor simulation fabrication method and device of soft rock grouting test piece for mine |
| CN203881641U (en) * | 2014-04-23 | 2014-10-15 | 西安科技大学 | Research experiment platform for initial speed of gas diffusion of coal under influence of multiple factors |
| CN104502224A (en) * | 2014-08-14 | 2015-04-08 | 中国石油大学(华东) | Device and method for determination of coal rock isothermal desorption curve under saturated water condition |
| CN204666464U (en) * | 2015-05-26 | 2015-09-23 | 河南理工大学 | The experimental provision of coal-seam gas level pressure desorb |
| CN204789214U (en) * | 2015-07-08 | 2015-11-18 | 河南理工大学 | Gas replacement effect testing arrangement in water and coal |
| CN105606482A (en) * | 2016-01-11 | 2016-05-25 | 辽宁工程技术大学 | Method for testing accumulated damage effects of liquid nitrogen on fracture structures of water-containing coal samples |
| CN105738248A (en) * | 2016-03-02 | 2016-07-06 | 重庆大学 | Gas absorption and desorption experimental device with controllable coal sample moisture content and experimental method thereof |
| CN105758763A (en) * | 2016-02-29 | 2016-07-13 | 辽宁工程技术大学 | Multifunctional coal adsorption/desorption gas parameter determination testing device and method |
| CN105758764A (en) * | 2016-04-28 | 2016-07-13 | 贵州大学 | Constant-temperature water tank suitable for isothermal adsorption experiment and capable of automatically supplementing water |
| CN105807028A (en) * | 2016-04-01 | 2016-07-27 | 太原理工大学 | Test device for desorbing gas by heating coal body through high temperature steam |
| CN106908347A (en) * | 2017-03-29 | 2017-06-30 | 西安科技大学 | The experimental provision and application method of moisture are quantitatively adding in a kind of coal body to the adsorbed state for having certain pressure |
| CN107192630A (en) * | 2017-07-14 | 2017-09-22 | 贵州大学 | A kind of water filling is to desorption of mash gas characteristic experimental apparatus |
| CN107860681A (en) * | 2017-11-08 | 2018-03-30 | 石家庄铁道大学 | A kind of the gas adsorption desorption properties test device and its method of testing of pre- adsorption moisture coal sample |
| CN107884307A (en) * | 2017-12-28 | 2018-04-06 | 贵州大学 | A kind of isothermal adsorption device for changing gas humidity |
| CN207351844U (en) * | 2017-11-15 | 2018-05-11 | 重庆大学 | The controllable gas adsorption desorption experimental apparatus of coal sample moisture |
| CN109060593A (en) * | 2018-05-15 | 2018-12-21 | 菏泽学院 | A kind of portable coal mine gas bearing capacity measurement device |
| CN209589750U (en) * | 2019-01-09 | 2019-11-05 | 重庆工业职业技术学院 | Coal seam with gas High Pressure Absorption/test device for desorption of controllable moisture |
-
2019
- 2019-01-09 CN CN201910020382.7A patent/CN109540734B/en active Active
Patent Citations (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6232341A (en) * | 1985-08-05 | 1987-02-12 | Daikin Ind Ltd | Inspection method for moisture content inside container |
| JPH11218510A (en) * | 1998-02-02 | 1999-08-10 | Asaga Akio | Constant-humidity generation apparatus |
| WO2002031469A1 (en) * | 2000-08-10 | 2002-04-18 | Rupprecht & Patashnick Company, Inc. | Exhaust gas particulate mass measurement apparatus with real-time moisture monitor |
| JP2008089564A (en) * | 2006-09-07 | 2008-04-17 | Fujitsu Ltd | Method and device for testing corrosion |
| CN102053141A (en) * | 2010-12-09 | 2011-05-11 | 中国矿业大学 | Device and method for testing influence of externally added water on desorption characteristic of gas-containing coal body |
| CN103018132A (en) * | 2012-12-21 | 2013-04-03 | 中煤科工集团重庆研究院 | Dynamic deformation characteristic testing method in coal absorption and desorption process |
| CN203112812U (en) * | 2013-01-30 | 2013-08-07 | 贵州大学 | Humidor for controlling generation or germination of plant pathogenic fungal spores |
| CN203881641U (en) * | 2014-04-23 | 2014-10-15 | 西安科技大学 | Research experiment platform for initial speed of gas diffusion of coal under influence of multiple factors |
| CN103954490A (en) * | 2014-05-15 | 2014-07-30 | 山东科技大学 | Indoor simulation fabrication method and device of soft rock grouting test piece for mine |
| CN104502224A (en) * | 2014-08-14 | 2015-04-08 | 中国石油大学(华东) | Device and method for determination of coal rock isothermal desorption curve under saturated water condition |
| CN204666464U (en) * | 2015-05-26 | 2015-09-23 | 河南理工大学 | The experimental provision of coal-seam gas level pressure desorb |
| CN204789214U (en) * | 2015-07-08 | 2015-11-18 | 河南理工大学 | Gas replacement effect testing arrangement in water and coal |
| CN105606482A (en) * | 2016-01-11 | 2016-05-25 | 辽宁工程技术大学 | Method for testing accumulated damage effects of liquid nitrogen on fracture structures of water-containing coal samples |
| CN105758763A (en) * | 2016-02-29 | 2016-07-13 | 辽宁工程技术大学 | Multifunctional coal adsorption/desorption gas parameter determination testing device and method |
| CN105738248A (en) * | 2016-03-02 | 2016-07-06 | 重庆大学 | Gas absorption and desorption experimental device with controllable coal sample moisture content and experimental method thereof |
| CN105807028A (en) * | 2016-04-01 | 2016-07-27 | 太原理工大学 | Test device for desorbing gas by heating coal body through high temperature steam |
| CN105758764A (en) * | 2016-04-28 | 2016-07-13 | 贵州大学 | Constant-temperature water tank suitable for isothermal adsorption experiment and capable of automatically supplementing water |
| CN106908347A (en) * | 2017-03-29 | 2017-06-30 | 西安科技大学 | The experimental provision and application method of moisture are quantitatively adding in a kind of coal body to the adsorbed state for having certain pressure |
| CN107192630A (en) * | 2017-07-14 | 2017-09-22 | 贵州大学 | A kind of water filling is to desorption of mash gas characteristic experimental apparatus |
| CN107860681A (en) * | 2017-11-08 | 2018-03-30 | 石家庄铁道大学 | A kind of the gas adsorption desorption properties test device and its method of testing of pre- adsorption moisture coal sample |
| CN207351844U (en) * | 2017-11-15 | 2018-05-11 | 重庆大学 | The controllable gas adsorption desorption experimental apparatus of coal sample moisture |
| CN107884307A (en) * | 2017-12-28 | 2018-04-06 | 贵州大学 | A kind of isothermal adsorption device for changing gas humidity |
| CN109060593A (en) * | 2018-05-15 | 2018-12-21 | 菏泽学院 | A kind of portable coal mine gas bearing capacity measurement device |
| CN209589750U (en) * | 2019-01-09 | 2019-11-05 | 重庆工业职业技术学院 | Coal seam with gas High Pressure Absorption/test device for desorption of controllable moisture |
Non-Patent Citations (8)
| Title |
|---|
| Effect of moisture content on methane adsorption- and desorption-induced deformation of tectonically deformed coal;Zhang, ZG 等;ADSORPTION SCIENCE & TECHNOLOGY;第36卷(第9-10期);第1648-1668页 * |
| Pore structure characteristics of low- and medium-rank coals and their differential adsorption and desorption effects;Wang, BY 等;JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING;第165卷;第1-12页 * |
| 原煤和型煤吸附-解吸瓦斯变形特性对比研究;张遵国 等;中国矿业大学学报;第43卷(第03期);第388-394页 * |
| 大倾角特厚煤层综放开采区段煤柱合理尺寸优化与研究;王旭杰;中国优秀硕士学位论文全文数据库工程科技Ⅰ辑(第02期);第B021-46页 * |
| 林柏泉 等.《煤矿瓦斯动力灾害及其治理》.中国矿业大学出版社,2018,第142-143页. * |
| 水分对煤瓦斯解吸性能及力学特性的影响研究;何涛;中国优秀硕士学位论文全文数据库工程科技Ⅰ辑(第02期);第B021-283页 * |
| 注水对煤的瓦斯扩散特性影响;陈向军 等;采矿与安全工程学报;第30卷(第3期);第443-448页 * |
| 赵发军 等.《煤岩瓦斯流动及瓦斯抽采》.西安地图出版社,2016,第65页. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109540734A (en) | 2019-03-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109540734B (en) | Gas-containing coal high-pressure adsorption/desorption test device and method capable of controlling moisture | |
| CN101629891B (en) | Fixedly coupled three-shaft servo seepage pressure chamber containing gas coal thermal flow | |
| CN108362614B (en) | Device and method for measuring diffusion coefficient in huff and puff process of shale oil carbon dioxide | |
| CN110887776B (en) | Device and method for measuring horizontal/vertical permeability of hydrate-containing reservoir | |
| CN105547908A (en) | Experimental testing equipment for mixed gas adsorption capacity of coal rock/shale | |
| CN103760064B (en) | Coal sample gas adsorption desorption experimental apparatus and method under the conditions of transformation | |
| CN106525526B (en) | A kind of measuring method of the high pressure water injection of raw coal containing gas and radial gas permeation rate | |
| Li et al. | An adsorption-permeability model of coal with slippage effect under stress and temperature coupling condition | |
| CN111579463B (en) | Physical simulation device for storing carbon dioxide in water and gas reservoir and simulation method thereof | |
| CN105651648A (en) | Replacement and absorption-desorption simulation test system and method | |
| CN113447397B (en) | Experimental system and experimental method for calibrating measurement error of coal seam gas content | |
| CN105910974A (en) | Experiment method and device for testing gas-containing coal seam isobaric imbibition effect | |
| CN205483902U (en) | Analytic simulating measurement setup of replacement and absorption | |
| CN103760086B (en) | Permeability variation experimental provision after carbon dioxide injection and fluorine in coal qualitative response | |
| CN108801879B (en) | Shale matrix particle porosity and permeability integrated measurement system and method | |
| CN108732329B (en) | Coal seam gas pressure measurement simulation experiment device and method | |
| CN113075109A (en) | Underground gas storage reservoir drying salting-out blocking injury experiment simulation system and method | |
| CN112858156A (en) | Bentonite erosion simulation test device and test method | |
| CN106018734B (en) | Method for determining reasonable infiltration time of coal seam water injection | |
| CN112763140B (en) | Dynamic sealing performance evaluation method for oil reservoir type gas storage cover layer | |
| CN114720655A (en) | System and method for simultaneously measuring gas output characteristics of rock cores in different occurrence states | |
| CN111458260B (en) | Coal gas desorption rule determination device, system and method | |
| CN109187926B (en) | Three-axis seepage test device for fractured coal rock mass and desorption-diffusion-seepage test system | |
| CN209589750U (en) | Coal seam with gas High Pressure Absorption/test device for desorption of controllable moisture | |
| CN207689470U (en) | A kind of methane hydrate balances each other the High-Voltage Experimentation device of research |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |