CN111830231A - Efficient separation, recovery treatment and cyclic utilization test method for coal-water-gas mixture - Google Patents
Efficient separation, recovery treatment and cyclic utilization test method for coal-water-gas mixture Download PDFInfo
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- 238000011084 recovery Methods 0.000 title claims abstract description 23
- 125000004122 cyclic group Chemical group 0.000 title claims description 9
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- 238000001914 filtration Methods 0.000 claims abstract description 11
- 238000001035 drying Methods 0.000 claims abstract description 10
- 239000002245 particle Substances 0.000 claims description 17
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- 238000000034 method Methods 0.000 abstract description 23
- 238000003795 desorption Methods 0.000 abstract description 4
- 238000004904 shortening Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 85
- 238000011161 development Methods 0.000 description 23
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Abstract
The invention discloses a high-efficiency separation, recovery treatment and recycling test method of a coal-water-gas mixture, which comprises the following steps: (1) performing multi-stage separation and filtration treatment on the coal-water-gas mixture by adopting a multi-stage screen to separate coal from water; (2) the separated water is repeatedly filtered by circulating back to the multi-stage screen; sampling the filtered water through a sampling port, and analyzing and testing; (3) drying the separated coal, and separating the coal and the coal bed gas in the drying process; (4) and collecting the separated coal bed gas. The test method can be used for efficiently separating and treating the gas and water in a test room, realizing the separation of coal, water and coal bed gas (gas), the treatment and recycling of water and the accelerated desorption and recovery of residual gas in coal in the test process, and shortening the test time.
Description
Technical Field
The invention relates to the technical field of separation of coal-water-gas mixtures, in particular to a test method for efficient separation, recovery treatment and cyclic utilization of coal-water-gas mixtures.
Background
Along with the development of national economy of China, coal still exists for a long time as a main energy consumption mode, and the ecological safety of the whole natural environment can be threatened by the greenhouse effect caused by the emission of a large amount of gas in the coal mining process. In order to meet the requirements of human beings on novel and clean energy and ensure the safety of human living environment, the environmental impact caused by pumping and discharging of underground water in the coal mining process and the extraction and utilization of coal bed gas (gas) in the coal resource mining process as novel and clean energy is widely concerned.
The coal-containing area with broken coal bodies for constructing soft coal development in China has rich coal bed gas resources, and the in-situ coal bed gas development in the soft coal development area is particularly difficult to realize at present. And the comprehensive utilization of coal bed gas (gas) resources for constructing a soft coal development area has important significance for promoting local economy, reducing the disaster degree of a mine, reducing the emission of greenhouse gases, improving the environmental quality of a mining area and the like. The method is an important theory and technical problem facing the development of the soft coal, and is also an important subject of the current research on the high-efficiency utilization of the coal bed gas (gas) in the soft coal development area and the safety of the environmental quality. At present, a constructed soft coal development area is a forbidden area for in-situ coal bed gas development, deep reports on the in-situ coal bed gas development adopted in the constructed soft coal development area are not found, and research and reports on efficient separation of coal, water and gas and resource recycling are not found. In the hydraulic coal mining process and the soft coal development area, a large amount of high-viscosity fluid coal-water mixture containing coal, water and gas can be generated through in-situ coal bed gas development, and the key points of realizing comprehensive utilization of resources and ensuring the safety of environmental quality are high-efficiency and rapid separation of coal and water, treatment and cyclic utilization of water resources and collection of coal bed gas (gas).
In view of this, the separation, collection and treatment of the high-concentration coal-water-gas mixture generated in the hydraulic coal mining process and the in-situ coal bed gas development process of the soft coal development area are simulated in the test room, which is important for researching the hydraulic coal mining technology of the soft coal development area and realizing the in-situ coal bed gas development, the design of the test method for realizing the high-concentration coal, water and gas efficient separation, collection and water purification cycle treatment of the hydraulic coal mining process and the in-situ coal bed gas development process of the soft coal development area in the test room is an urgent problem to be solved in the research of constructing the hydraulic coal mining and the in-situ coal bed gas development, and the test method has important theoretical guidance for the hydraulic coal mining technology and the in-situ coal bed gas development of the soft coal development area. The existing test method does not simulate the separation, collection, treatment and cyclic utilization of high-concentration coal-water-gas mixture generated in the hydraulic coal mining process and the in-situ coal bed gas mining process of a tectonic coal development area, and the test method does not realize real-time collection of test samples for test analysis data and real-time monitoring.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a test method for high-efficiency separation, recovery treatment and recycling of a coal-water-gas mixture.
The invention solves the technical problems through the following technical means:
a high-efficiency separation, recovery treatment and recycling test method for a coal-water-gas mixture comprises the following steps:
(1) performing multi-stage separation and filtration treatment on the coal-water-gas mixture by adopting a multi-stage screen to separate coal from water, wherein large coal particles separated are on the lower part and small coal particles are on the upper part;
(2) the separated water is recycled to the multi-stage screen for repeated filtration, and the multi-stage screen is washed at the same time; sampling the filtered water through a sampling port, and analyzing and testing;
(3) drying the separated coal, and separating the coal and the coal bed gas in the drying process;
(4) and collecting the separated coal bed gas.
A test device for a test method of high-efficiency separation, recovery treatment and cyclic utilization of a coal-water-gas mixture comprises a coal-water separation bin, a coal bin and a coal bed gas collection device; the upper end and the lower end of the coal-water separation bin are respectively provided with a feeding pipe and a water outlet pipe;
at least one filter screen is arranged in the coal water separation bin; from top to bottom, the aperture of the filter screen is gradually reduced; the filter screen divides the coal-water separation bin into a plurality of separation chambers; a coal chute is arranged between the separation chamber and the coal bunker; the water outlet pipe is sequentially provided with a water pump, a water return pipe and a water outlet along the water flow direction; one end of the water return pipe, which is far away from the water outlet pipe, is connected with the feeding pipe;
an electric heater is arranged on the coal bunker; the lower end of the coal bunker is provided with a coal discharge port;
the coal bed gas collecting device comprises a drainage and gas collection device, a first vent pipe, a second vent pipe and a vacuum gas cylinder; one end of the first vent pipe is connected with the upper end of the coal bunker, and the other end of the first vent pipe is connected with the water and gas discharging and collecting device; one end of the second vent pipe is connected with the water and gas discharging device, and the other end of the second vent pipe is connected with the vacuum gas cylinder.
Preferably, in the test device of the test method for efficient separation, recovery treatment and recycling of the coal-water-gas mixture, the filter screen is arranged in an inclined manner, and the inclination angle is 30-45 degrees; the coal chute is arranged at the lower end of the filter screen; the coal chute is obliquely arranged, and the inclination angle of the coal chute is the same as that of the filter screen.
Preferably, the water outlet pipe is provided with a sampling port;
preferably, the test device of the test method for efficient separation, recovery treatment and recycling of the coal-water-gas mixture comprises a water tank and a gas collecting tank; the opening of the gas collecting groove is downward; the open end of the gas collecting groove extends into the water tank; the first vent pipe extends into the middle lower part of the gas collecting tank; and the second vent pipe is connected with the upper end of the gas collecting groove.
Preferably, the test device for the test method for efficient separation, recovery treatment and recycling of the coal-water-gas mixture is characterized in that the feed pipe, the return pipe, the water outlet and the first vent pipe are all provided with control valves.
Preferably, the second vent pipe is sequentially provided with a flowmeter and a first pressure gauge along the airflow direction; and a second pressure gauge is arranged on the vacuum gas cylinder.
Preferably, the coal-water separation bin and the coal bunker are both made of transparent materials.
The invention has the advantages that: the test method can be used for efficiently separating and treating the coal gas and the water in a test room, realizing the separation of coal, water and coal bed gas (gas), the treatment and the cyclic utilization of the water and the accelerated desorption and recovery of residual gas in the coal in the test process, shortening the test time and realizing the collection of a water sample in the coal gas and water treatment process. The test method has the advantages of high controllability, easy control, convenient installation, simple operation, safety and reliability.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
(1) performing multi-stage separation and filtration treatment on the coal-water-gas mixture by adopting a multi-stage screen to separate coal from water, wherein large coal particles separated are on the lower part and small coal particles are on the upper part;
through multi-stage separation and filtration, coal particles with various particle sizes are arranged in a layered mode, large particles are arranged at the lower part, small particles are arranged at the upper part, when coal bed gas is desorbed, gaps at the large particle coal particles are large, the desorbed coal bed gas is easy to move upwards, an impact effect is exerted on the upper small particle coal bed, the gaps at the upper small particle coal bed are enlarged, and the coal bed gas desorbed by the upper small particle coal is convenient to discharge;
(2) the separated water is recycled to the multi-stage screen for repeated filtration, and the multi-stage screen is washed at the same time; sampling the filtered water through a sampling port, and analyzing and testing;
filtered water returns to the multi-stage screen by circulation, so that on one hand, the multi-stage screen plays a role in filtering for many times to improve the separation effect of coal and water, and on the other hand, when the filtered water returns to the screen, the screen can be flushed, the screen is prevented from being blocked, and the circulation of the water is realized;
(3) drying the separated coal, and separating the coal and the coal bed gas in the drying process;
when the separated coal is dried, the drying heat promotes desorption of coal bed gas in the coal, and the coal does not need to be heated and dried or heated and desorbed independently, so that energy is saved;
(4) and collecting the separated coal bed gas.
A test device for a high-efficiency separation, recovery treatment and recycling test method of a coal-water-gas mixture comprises a coal-water separation bin 1, a coal bin 2 and a coal bed gas collection device 3; the upper end and the lower end of the coal-water separation bin 1 are respectively provided with a feed pipe 11 and a water outlet pipe 12;
at least one filter screen 13 is arranged in the coal-water separation bin 1; from top to bottom, the aperture of the filter screen 13 is gradually reduced; the filter screen 13 divides the coal-water separation bin 1 into a plurality of separation chambers 131; a coal chute 1311 is arranged between the separation chamber 131 and the coal bunker 2; the water outlet pipe 12 is sequentially provided with a water pump 121, a water return pipe 122 and a water outlet 123 along the water flow direction; one end of the water return pipe 122 far away from the water outlet pipe 12 is connected with the feeding pipe 11;
the coal bunker 2 is provided with an electric heater 21; the lower end of the coal bunker 2 is provided with a coal discharge port 22;
the coal bed gas collecting device 3 comprises a drainage gas collecting device 31, a first vent pipe 32, a second vent pipe 33 and a vacuum gas cylinder 34; one end of the first breather pipe 32 is connected with the upper end of the coal bunker 2, and the other end is connected with the water and gas discharging and collecting device 31; one end of the second vent pipe 33 is connected with the drainage and gas collection device 31, and the other end is connected with the vacuum gas cylinder.
Preferably, the filter screen 13 is arranged obliquely, and the inclination angle is 30-45 degrees; the coal chute 1311 is arranged at the lower end of the filter screen 13; the coal chute 1311 is arranged obliquely, and the inclination angle is the same as that of the filter screen 13.
Preferably, the water outlet pipe 12 is provided with a sampling port 124;
preferably, the drainage and gas collection device 31 comprises a water tank 311 and a gas collection tank 312; the opening of the gas collecting groove 312 faces downwards; the open end of the gas collecting channel 312 extends into the water channel 311; the first vent pipe 32 extends into the middle lower position of the gas collecting groove 312; the second vent pipe 33 is connected to the upper end of the gas collecting tank 312.
Preferably, the feed pipe 11, the return pipe 122, the water outlet 123 and the first vent pipe 32 are all provided with a control valve 111.
Preferably, the second vent pipe 33 is sequentially provided with a flow meter 331 and a first pressure gauge 332 along the air flow direction; a second pressure gauge 341 is arranged on the vacuum gas cylinder 34.
Preferably, in order to observe the test condition in real time and conveniently record the test process, the coal-water separation bin 1 and the coal bin 2 are both made of transparent materials; such as glass.
The test method can be used for efficiently separating and treating the coal gas and the water in a test room, realizing the separation of coal, water and coal bed gas (gas), the treatment and the cyclic utilization of the water and the accelerated desorption and recovery of residual gas in the coal in the test process, shortening the test time and realizing the collection of a water sample in the coal gas and water treatment process. The test method has the advantages of high controllability, easy control, convenient installation, simple operation, safety and reliability.
The specific test method comprises the following steps: adding a coal-water-gas mixture into a coal-water separation bin from a feed inlet, filtering and removing most of water in coal through a filter screen in the coal-water separation bin to realize separation of the coal and the water, enabling the separated water to enter the coal bin through a coal chute, and arranging large particles on the lower part and small particles on the upper part; pumping the filtered water to a feed pipe through a water return pipe by a water pump, entering a coal-water separation bin, filtering again through a screen, impacting the screen, and taking a water sample through a sampling port to analyze the water quality; when the coal water in the coal water separation bin is more, the coal water is discharged through the water outlet and collected for utilization; heating the coal in the coal bunker, drying the coal, simultaneously realizing the separation of the coal and the coal bed gas, and discharging the separated coal from a coal discharge port for collection and utilization; the separated coal bed gas enters the drainage and gas collection device through the first vent pipe, is collected through the drainage and gas collection device and then is sent into the vacuum gas cylinder for collection.
It is noted that, in this document, relational terms such as first and second, and the like, if any, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. A high-efficiency separation, recovery treatment and cyclic utilization test method for a coal-water-gas mixture is characterized by comprising the following steps:
(1) performing multi-stage separation and filtration treatment on the coal-water-gas mixture by adopting a multi-stage screen to separate coal from water, wherein large coal particles separated are on the lower part and small coal particles are on the upper part;
(2) the separated water is recycled to the multi-stage screen for repeated filtration, and the multi-stage screen is washed at the same time; sampling the filtered water through a sampling port, and analyzing and testing;
(3) drying the separated coal, and separating the coal and the coal bed gas in the drying process;
(4) and collecting the separated coal bed gas.
2. The test device for the high-efficiency separation, recovery treatment and recycling test method of the coal-water-gas mixture according to claim 1 is characterized in that: comprises a coal water separation bin (1), a coal bin (2) and a coal bed gas collection device (3); the upper end and the lower end of the coal-water separation bin (1) are respectively provided with a feeding pipe (11) and a water outlet pipe (12);
at least one filter screen (13) is arranged in the coal-water separation bin (1); from top to bottom, the aperture of the filter screen (13) is gradually reduced; the filter screen (13) divides the coal-water separation bin (1) into a plurality of separation chambers (131); a coal chute (1311) is arranged between the separation chamber (131) and the coal bunker (2); the water outlet pipe (12) is sequentially provided with a water pump (121), a water return pipe (122) and a water outlet (123) along the water flow direction; one end of the water return pipe (122) far away from the water outlet pipe (12) is connected with the feeding pipe (11);
an electric heater (21) is arranged on the coal bunker (2); the lower end of the coal bunker (2) is provided with a coal discharge port (22);
the coal bed gas collecting device (3) comprises a drainage and gas collection device (31), a first vent pipe (32), a second vent pipe (33) and a vacuum gas cylinder (34); one end of the first vent pipe (32) is connected with the upper end of the coal bunker (2), and the other end of the first vent pipe is connected with the water and gas discharging and collecting device (31); one end of the second vent pipe (33) is connected with the water and gas discharging and collecting device (31), and the other end is connected with the vacuum gas cylinder.
3. The test device for the high-efficiency separation, recovery treatment and recycling test method of the coal-water-gas mixture according to claim 2 is characterized in that: the filter screen (13) is obliquely arranged, and the inclination angle is 30-45 degrees; the coal chute (1311) is arranged at the lower end of the filter screen (13); the coal chute (1311) is obliquely arranged, and the inclination angle is the same as that of the filter screen (13).
4. The test device for the high-efficiency separation, recovery treatment and recycling test method of the coal-water-gas mixture according to claim 2 is characterized in that: a sampling port (124) is arranged on the water outlet pipe (12);
5. the test device for the high-efficiency separation, recovery treatment and recycling test method of the coal-water-gas mixture according to claim 2 is characterized in that: the drainage and gas collection device (31) comprises a water tank (311) and a gas collection tank (312); the opening of the gas collecting groove (312) faces downwards; the open end of the gas collecting groove (312) extends into the water tank (311); the first vent pipe (32) extends into the middle lower part of the gas collecting groove (312); the second vent pipe (33) is connected with the upper end of the gas collecting groove (312).
6. The test device for the high-efficiency separation, recovery treatment and recycling test method of the coal-water-gas mixture according to claim 2 is characterized in that: the feeding pipe (11), the water return pipe (122), the water outlet (123) and the first vent pipe (32) are all provided with control valves (111).
7. The test device for the high-efficiency separation, recovery treatment and recycling test method of the coal-water-gas mixture according to claim 2 is characterized in that: the second vent pipe (33) is sequentially provided with a flow meter (331) and a first pressure gauge (332) along the airflow direction; and a second pressure gauge (341) is arranged on the vacuum gas cylinder (34).
8. The test device for the high-efficiency separation, recovery treatment and recycling test method of the coal-water-gas mixture according to claim 2 is characterized in that: the coal-water separation bin (1) and the coal bin (2) are both made of transparent materials.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010706758.2A CN111830231B (en) | 2020-07-21 | 2020-07-21 | Efficient separation, recovery treatment and cyclic utilization test method for coal-water gas mixture |
| ZA2021/03156A ZA202103156B (en) | 2020-07-21 | 2021-05-10 | Efficient separation, recycling treatment and cyclic utilization test method for coal-water-gas mixture |
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| CN202010706758.2A CN111830231B (en) | 2020-07-21 | 2020-07-21 | Efficient separation, recovery treatment and cyclic utilization test method for coal-water gas mixture |
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| CN111830231A true CN111830231A (en) | 2020-10-27 |
| CN111830231B CN111830231B (en) | 2023-07-21 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114177733A (en) * | 2021-12-01 | 2022-03-15 | 武汉工程大学 | System for coal-bed gas drainage and gas production water-coal separation and water purification and control method |
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| CN111830231B (en) | 2023-07-21 |
| ZA202103156B (en) | 2022-08-31 |
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