CN111830231B - 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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- CN111830231B CN111830231B CN202010706758.2A CN202010706758A CN111830231B CN 111830231 B CN111830231 B CN 111830231B CN 202010706758 A CN202010706758 A CN 202010706758A CN 111830231 B CN111830231 B CN 111830231B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 105
- 238000000926 separation method Methods 0.000 title claims abstract description 58
- 239000000203 mixture Substances 0.000 title claims abstract description 25
- 238000010998 test method Methods 0.000 title claims abstract description 22
- 238000011084 recovery Methods 0.000 title claims abstract description 18
- 125000004122 cyclic group Chemical group 0.000 title abstract description 7
- 239000003245 coal Substances 0.000 claims abstract description 122
- 238000012360 testing method Methods 0.000 claims abstract description 25
- 238000004064 recycling Methods 0.000 claims abstract description 16
- 238000001914 filtration Methods 0.000 claims abstract description 11
- 238000005070 sampling Methods 0.000 claims abstract description 11
- 238000001035 drying Methods 0.000 claims abstract description 10
- 239000002245 particle Substances 0.000 claims description 17
- 230000007423 decrease Effects 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 23
- 238000003795 desorption Methods 0.000 abstract description 4
- 239000003034 coal gas Substances 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 80
- 238000011161 development Methods 0.000 description 24
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 22
- 238000005065 mining Methods 0.000 description 13
- 238000011065 in-situ storage Methods 0.000 description 11
- 230000007613 environmental effect Effects 0.000 description 5
- 238000010276 construction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 241000282414 Homo sapiens Species 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 239000012780 transparent material Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/22—Fuels; Explosives
- G01N33/222—Solid fuels, e.g. coal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
- B01D29/03—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements self-supporting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/50—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
- B01D29/56—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in series connection
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B23/00—Heating arrangements
- F26B23/04—Heating arrangements using electric heating
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/18—Water
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
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- G01N33/225—Gaseous fuels, e.g. natural gas
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Abstract
The invention discloses a test method for efficient separation, recovery treatment and recycling of a coal-water gas mixture, which comprises the following steps: (1) Carrying out multistage separation and filtration treatment on the coal-water mixture by adopting a multistage screen to separate coal from water; (2) The separated water is recycled to the multistage screen for repeated filtration; sampling, analyzing and testing the filtered water through a sampling port; (3) Drying the separated coal, wherein the coal and the coal bed gas are separated in the drying process; (4) collecting the separated coal bed gas. The test method can be used for carrying out high-efficiency separation treatment on coal gas and water in a test room, and realizes separation of coal, water and coal bed gas (gas), treatment and cyclic utilization of water, and accelerated desorption and recovery of residual gas in coal in the test process, so that the test time is shortened.
Description
Technical Field
The invention relates to the technical field of coal-water-gas mixture separation, in particular to a test method for efficient separation, recovery treatment and recycling of a coal-water-gas mixture.
Background
Along with the development of national economy in China, coal is still long-term in a main energy consumption mode, and the ecological safety of the whole natural environment is still 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 sources and ensure the safety of human living environments, the coal bed gas (gas) in the coal resource exploitation process is widely focused on as a novel and clean energy source for extraction and utilization and the environmental influence caused by groundwater drainage in the coal mining process.
The coal-containing area with broken coal bodies has rich coalbed methane resources, and the in-situ coalbed methane development is particularly difficult to realize in the development area of the constructed soft coal. The comprehensive utilization of the coalbed methane (gas) resources for constructing the soft coal development area has important significance for promoting local economy, reducing mine disaster degree, reducing greenhouse gas emission, improving the environmental quality of mining areas and the like. The construction of the hydraulic coal mining and in-situ coalbed methane development of the soft coal development area tend to generate a large amount of coal-water-gas mixture, and how to realize the efficient and rapid separation of coal, water and gas and the recycling and utilization of resources of the coal, water and gas and ensure the safety of environmental quality is an important theory and technical problem facing the construction of the soft coal development, and is also an important subject for the current research of the efficient utilization of the coalbed methane (gas) of the construction of the soft coal development area and the safety of environmental quality. At present, the constructed soft coal development area is a forbidden area for in-situ coalbed methane development, no deep report is made on the development of the in-situ coalbed methane adopted in the constructed soft coal development area, and no study and report are made on the efficient separation of coal, water and gas and the recycling of resources. The hydraulic coal mining process and the constructed soft coal development area can generate a large amount of fluid coal-water mixture containing coal, water and gas with high viscosity through in-situ coalbed methane development, and the key points of realizing comprehensive utilization of resources and ensuring environmental quality safety are the efficient and rapid separation of coal and water, the treatment and cyclic utilization of water resources and the collection of coalbed methane (gas).
In view of the above, the experimental method for simulating 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 in the laboratory is critical for researching the hydraulic coal mining technology and realizing the in-situ coal-bed gas development of the soft coal development area, and the experimental method which can be used for realizing the efficient separation, collection and water purification cyclic treatment of the high-concentration coal, water and gas generated in the hydraulic coal mining process and the in-situ coal-bed gas development process of the soft coal development area in the laboratory is an urgent topic to be solved in the hydraulic coal mining and in-situ coal-bed gas development research of the soft coal development area, and has important theoretical guidance for both the hydraulic coal mining technology and the in-situ coal-bed gas mining of the soft coal development area. The existing test method does not simulate the separation, collection, treatment and recycling of the high-concentration coal-water-gas mixture generated in the hydraulic coal mining process and the in-situ coal bed gas mining process of the structural coal development area, and the test method does not realize the real-time collection of test samples for test analysis data and the real-time monitoring.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a test method for efficient separation, recovery treatment and recycling of a coal-water gas mixture.
The invention solves the technical problems by the following technical means:
a test method for efficient separation, recovery treatment and recycling of a coal-water gas mixture comprises the following steps:
(1) Carrying out multistage separation and filtration treatment on the coal-water-gas mixture by adopting a multistage screen to separate coal from water, wherein separated large coal particles are arranged on the upper side of small coal particles;
(2) The separated water is recycled to the multistage screen for repeated filtration, and the multistage screen is washed at the same time; sampling, analyzing and testing the filtered water through a sampling port;
(3) Drying the separated coal, wherein the coal and the coal bed gas are separated in the drying process;
(4) And collecting the separated coal bed gas.
The test device for the test method for high-efficiency separation, recovery treatment and recycling of the coal-water-gas mixture comprises a coal-water separation bin, a coal bin and a coal bed gas collecting device; the upper end and the lower end of the coal-water separation bin are respectively provided with a feed pipe and a water outlet pipe;
at least one filter screen is arranged in the coal-water separation bin; from top to bottom, the pore diameter of the filter screen gradually decreases; 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 bin; 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 feed pipe;
an electric heater is arranged on the coal bin; the lower end of the coal bin is provided with a coal discharge port;
the coalbed methane collecting device comprises a drainage and gas collecting 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 bin, and the other end of the first vent pipe is connected with the water and gas drainage and collection device; one end of the second vent pipe is connected with the water draining and gas collecting device, and the other end of the second vent pipe is connected with the vacuum gas cylinder.
Preferably, the test device of the test method for efficient separation, recovery treatment and recycling of the coal-water gas mixture is characterized in that the filter screen is obliquely arranged, 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 is the same as that of the filter screen.
Preferably, the test device of the test method for efficient separation, recovery treatment and recycling of the coal-water-gas mixture is provided with a sampling port on the water outlet pipe;
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 tank is downward; the opening end of the gas collecting tank extends into the water tank; the first vent pipe stretches into the middle lower part of the gas collecting tank; the second vent pipe is connected with the upper end of the gas collecting channel.
Preferably, the test device of the test method for efficient separation, recovery treatment and recycling of the coal-water-gas mixture is provided with control valves on the feed pipe, the return pipe, the water outlet and the first vent pipe.
Preferably, the test device of the test method for efficient separation, recovery treatment and recycling of the coal-water gas mixture is characterized in that 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 bin are made of transparent materials.
The invention has the advantages that: the test method can be used for carrying out high-efficiency separation treatment on coal gas and water in a test room, realizing separation of coal, water and coal bed gas (gas) in the test process, treatment and cyclic utilization of water, and accelerated desorption and recovery of residual gas in the coal, shortening the test time, and realizing collection of water samples in the coal-water gas treatment process. The test method has the advantages of high controllable degree, easy control, convenient installation, simple operation, safety and reliability.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Embodiment 1, a method for testing efficient separation, recovery treatment and recycling of a coal-water gas mixture, is characterized by comprising the following steps:
(1) Carrying out multistage separation and filtration treatment on the coal-water-gas mixture by adopting a multistage screen to separate coal from water, wherein separated large coal particles are arranged on the upper side of small coal particles;
the coal particles with the particle sizes are layered by multi-stage separation and filtration, the large particles are arranged downwards, the small particles are arranged upwards, when the coal bed gas is desorbed, the gaps at the large particle coal particles are larger, the desorbed coal bed gas is easy to move upwards, the impact effect on the upper small particle coal bed is achieved, the gaps at the upper small particle coal bed are enlarged, and the coal bed gas desorbed by the upper small particle coal is conveniently discharged;
(2) The separated water is recycled to the multistage screen for repeated filtration, and the multistage screen is washed at the same time; sampling, analyzing and testing the filtered water through a sampling port;
the filtered water is circulated to the multistage screen mesh to perform the function of repeated filtration on one hand, improve the separation effect of coal and water, and perform the scouring function of the screen mesh to avoid the screen mesh blocking when the filtered water is returned to the screen mesh to realize the circulation of water on the other hand;
(3) Drying the separated coal, wherein the coal and the coal bed gas are separated in the drying process;
when the separated coal is dried, the drying heat promotes the desorption of coal bed gas in the coal, and the coal does not need to be independently heated, dried or desorbed, so that the energy is saved;
(4) And collecting the separated coal bed gas.
The test device for the test method of efficient separation, recovery treatment and recycling of the coal-water-gas mixture comprises a coal-water separation bin 1, a coal bin 2 and a coal bed gas collecting 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 pore diameter of the filter screen 13 gradually decreases; 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 bin 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, which is far away from the water outlet pipe 12, is connected with the feeding pipe 11;
an electric heater 21 is arranged on the coal bin 2; the lower end of the coal bin 2 is provided with a coal discharge port 22;
the coalbed methane collecting device 3 comprises a drainage and gas collecting device 31, a first breather pipe 32, a second breather 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 is connected with the water and gas drainage device 31; one end of the second vent pipe 33 is connected to the water and gas drainage and collection device 31, and the other end is connected to a vacuum gas cylinder.
Preferably, 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 inclined at the same inclination angle as the filter screen 13.
Preferably, the water outlet pipe 12 is provided with a sampling port 124;
preferably, the water and gas drainage and collection device 31 comprises a water tank 311 and a gas collection tank 312; the opening of the gas collecting channel 312 is downward; the opening end of the gas collecting tank 312 extends into the water tank 311; the first vent pipe 32 extends into the middle lower part of the gas collecting channel 312; the second ventilation pipe 33 is connected to the upper end of the gas collection 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 control valves 111.
Preferably, the second vent pipe 33 is provided with a flow meter 331 and a first pressure meter 332 in sequence along the airflow direction; the vacuum gas cylinder 34 is provided with a second pressure gauge 341.
Preferably, in order to observe the test condition in real time and record the test process conveniently, the coal-water separation bin 1 and the coal bin 2 are made of transparent materials; such as glass.
The test method can be used for carrying out high-efficiency separation treatment on coal gas and water in a test room, realizing separation of coal, water and coal bed gas (gas) in the test process, treatment and cyclic utilization of water, and accelerated desorption and recovery of residual gas in the coal, shortening the test time, and realizing collection of water samples in the coal-water gas treatment process. The test method has the advantages of high controllable degree, easy control, convenient installation, simple operation, safety and reliability.
The specific test method comprises the following steps: adding the 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 separate the coal from water, and enabling the separated water to enter the coal bin through a coal chute and be distributed on the upper part according to large particles and small particles; the filtered water is pumped to the feeding pipe through the water return pipe by the water pump, enters the coal-water separation bin, is filtered again through the screen, impacts the screen, and adopts a water sample through the sampling port to analyze the water quality; when more water is in the coal-water separation bin, the coal-water separation bin is discharged through a water outlet for collection and utilization; heating coal in a coal bunker, drying the coal, separating the coal from coal bed gas, and discharging, collecting and utilizing the separated coal from a coal discharge port; the separated coal bed gas enters the drainage gas-collecting device through the first vent pipe, and is collected through the drainage gas-collecting device and then is sent into the vacuum gas cylinder for collection.
It is noted that 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. Moreover, 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 one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the 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 scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (1)
1. The test method for efficient separation, recovery treatment and recycling of the coal-water-gas mixture is characterized by comprising the following steps of:
(1) The coal-water separation bin is internally provided with a plurality of filter screens; from top to bottom, the pore diameter of the filter screen gradually decreases; 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 bin; the filter screen is obliquely arranged, 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 is the same as that of the filter screen;
the coal-water mixture is subjected to multistage separation and filtration treatment by adopting the multistage filter screen of the coal-water separation bin, coal and water are separated, and separated large coal particles are arranged on the upper part of the lower small coal particles;
(2) The separated water is recycled to the multistage screen for repeated filtration, and the multistage screen is washed at the same time; sampling, analyzing and testing the filtered water through a sampling port;
(3) Drying the separated coal, wherein the coal and the coal bed gas are separated in the drying process;
(4) And collecting the separated coal bed gas.
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| 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 CN111830231A (en) | 2020-10-27 |
| CN111830231B true CN111830231B (en) | 2023-07-21 |
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| CN111830231A (en) | 2020-10-27 |
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