CN108776041B - Gas-water-coal fine separation, collection and water purification cyclic treatment test method - Google Patents
Gas-water-coal fine separation, collection and water purification cyclic treatment test method Download PDFInfo
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- 238000000926 separation method Methods 0.000 title claims abstract description 233
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 109
- 239000003245 coal Substances 0.000 title claims abstract description 107
- 238000000746 purification Methods 0.000 title claims abstract description 33
- 238000010998 test method Methods 0.000 title claims abstract description 17
- 125000004122 cyclic group Chemical group 0.000 title claims abstract description 11
- 238000001556 precipitation Methods 0.000 claims abstract description 176
- 239000000203 mixture Substances 0.000 claims abstract description 37
- 238000012360 testing method Methods 0.000 claims abstract description 25
- 238000000034 method Methods 0.000 claims abstract description 23
- 230000008569 process Effects 0.000 claims abstract description 19
- 238000005070 sampling Methods 0.000 claims abstract description 7
- 238000004062 sedimentation Methods 0.000 claims description 48
- 238000001035 drying Methods 0.000 claims description 15
- 238000005192 partition Methods 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 5
- 239000007789 gas Substances 0.000 abstract description 78
- 238000011161 development Methods 0.000 abstract description 34
- 238000011065 in-situ storage Methods 0.000 abstract description 18
- 238000007405 data analysis Methods 0.000 abstract description 3
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
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- 230000005484 gravity Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
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- 238000004458 analytical method Methods 0.000 description 1
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Abstract
The invention discloses a test method for fine separation, collection and water purification cycle treatment of gas-water-coal, which comprises the following steps of (1) judging the content of water and coal in a coal-water mixture, carrying out primary precipitation separation on the coal-water mixture when the coal-water mixture mainly contains water, and carrying out tertiary precipitation separation on the coal-water mixture when the coal-water mixture mainly contains coal; sampling in real time to analyze data in the process of precipitation separation; (2) collecting gas in the coal-water mixture in the precipitation separation process in the step (1); (3) and if the water quality after precipitation separation reaches the standard, the water can be used for circular operation, and if the water quality does not reach the standard, the first-stage precipitation separation and other steps are carried out continuously. The test method provided by the invention can simulate a high-concentration gas, water and coal mixture generated in the in-situ coal bed gas development process of the structural coal development area in a test room, realize the fine separation, collection and water purification cyclic treatment test of gas, water and coal, and can collect a water sample for data analysis in the test process.
Description
Technical Field
The invention relates to a test method for separating gas, water and coal and purifying water generated in a pressure relief development process of an in-situ coal bed gas horizontal well of tectonic coal in a test room, in particular to a test method for realizing efficient and rapid separation and water resource purification treatment of gas, water and coal generated in the pressure relief development process of the in-situ coal bed gas horizontal well of a tectonic coal development area, and belongs to the field of coal bed gas exploitation.
Background
With the development of national economy of China, the situation of traditional energy supply becomes more and more severe, the greenhouse effect generated by a large amount of carbon dioxide discharged in human activities seriously threatens the whole natural ecological safety, and the human demands for novel and clean energy are more and more large, so that the coal bed gas is widely concerned as a novel and clean energy.
China builds coal development, and the coal-bed gas areas have rich coal-bed gas resources, and the coal-bed gas development has important significance for relieving the current situation of oil-gas resource shortage in China, lightening the disaster degree of mines, reducing the emission of greenhouse gases and the like. The realization of in-situ coal bed gas development in a tectonic coal development area inevitably generates a large amount of gas, water, coal-water mixtures, and how to realize the efficient and rapid separation of gas, water and coal and the resource recovery and utilization of gas, water and coal are important theories and technical problems in the development process of adopting an in-situ coal bed gas horizontal well in the tectonic coal development area and are also important subjects of the current research on the improvement of the yield of a coal bed gas well in the tectonic coal development area. At present, a tectonic coal development area is an forbidden area for in-situ coal bed gas development, deep reports on the in-situ coal bed gas development adopted in the tectonic coal development area are not found, and research and reports on efficient and rapid separation of gas, water and coal and water resource purification are not found. A large amount of high-viscosity fluid coal-water mixture containing coal, water and gas can be generated in the tectonic coal development area through in-situ coal bed gas development, and efficient coal mining, gas production and water resource recycling are realized by efficient and rapid separation of water and coal and water purification circulating treatment, so that the method is particularly key to the effective application of the in-situ horizontal well development technology in the tectonic coal development area.
In view of this, the separation, collection and treatment of the mixture of high-concentration gas, water and coal-water generated in the process of developing the in-situ coal bed gas in the structural coal development area are simulated in the test room, which is important for researching the development of the in-situ coal bed gas in the structural coal development area, and the design of the test method for realizing the fine separation, collection and water purification circulation treatment of the high-concentration gas, water and coal generated in the process of developing the in-situ coal bed gas in the structural coal development area in the test room is an urgent subject to be solved in the research of the in-situ coal bed gas exploitation in the structural coal development area, and has important theoretical guidance for the in-situ coal bed gas exploitation in the structural coal development area. The existing test method does not simulate the separation, collection and treatment of a high-concentration gas, water and coal-water mixture mined by in-situ coal bed gas in a tectonic coal development area, and does not collect test samples in real time to realize real-time sampling to obtain test analysis data and realize real-time monitoring.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a test method for realizing fine separation, collection and water purification and cyclic treatment of high-concentration gas, water and coal generated in the development process of in-situ coal bed gas in a constructed coal development area in a test room.
The invention solves the technical problems through the following technical means:
a gas-water-coal fine separation, collection and water purification cyclic treatment test method comprises the following steps:
(1) judging the content of water and coal in the coal-water mixture, and when the coal-water mixture is mainly water, performing primary precipitation separation on the coal-water mixture, and when the coal-water mixture is mainly coal, performing tertiary precipitation separation on the coal-water mixture; sampling in real time to analyze data in the process of precipitation separation;
(2) collecting gas in the coal-water mixture in the precipitation separation process in the step (1);
(3) the water quality after precipitation separation can be used for circulating operation when reaching the standard, and primary precipitation separation is continued when not reaching the standard;
(4) after the test is finished, each device is cleaned for the next use.
The utility model provides a test device that is used for meticulous separation of gas-water-coal, collects and water purification cycle processing test method, includes tertiary precipitation separator, one-level precipitation separator, purification water pond, coal bed gas collection device, tertiary precipitation separator is connected with the purification water pond, coal bed gas collection device and tertiary precipitation separator, one-level precipitation separator are connected.
Preferably, the third-level precipitation separation device comprises a first precipitation separation tank, a second precipitation separation tank and a third precipitation separation tank, the first-level precipitation separation device comprises a fourth precipitation separation tank, the first precipitation separation tank, the second precipitation separation tank, the third precipitation separation tank and the fourth precipitation separation tank are internally provided with a partition wall body, the partition wall body divides the first precipitation separation tank, the second precipitation separation tank, the third precipitation separation tank and the fourth precipitation separation tank into a main precipitation separation chamber and an auxiliary precipitation separation chamber, overflow ports are arranged on the main precipitation separation chamber and the auxiliary precipitation separation chamber of the first precipitation separation tank, the second precipitation separation tank and the third precipitation separation tank, the main precipitation separation chamber of the first precipitation separation tank, the second precipitation separation tank and the third precipitation separation tank are communicated with each other through the overflow ports, and the first precipitation separation tank, the second precipitation separation tank and the third precipitation separation tank are communicated with each other through the overflow ports, The second sedimentation separation pond, the vice sedimentation separation room of third sedimentation separation pond pass through the overflow mouth intercommunication, the main sedimentation separation room of third sedimentation separation pond, vice sedimentation separation room all communicate through overflow mouth and purifying water tank, all install the filter screen in main sedimentation separation room and the vice sedimentation separation room, all be provided with coal water mixture on the main sedimentation separation room of first sedimentation separation pond, fourth sedimentation separation pond and the vice sedimentation separation room and insert the mouth, also install coal bed gas drainage pipe between the main sedimentation separation room of first sedimentation separation pond, second sedimentation separation pond, third sedimentation separation pond, between the vice sedimentation separation room, all install coal bed gas drainage pipe between the vice sedimentation separation room, also install coal bed gas drainage pipe between the main sedimentation separation room of third sedimentation separation pond, vice sedimentation separation room and the purifying water tank, one side that main sedimentation separation room and vice sedimentation separation room are located after the filter screen filters all is provided with the sample and the coal slime clearance mouth, and coal slime clearing and transporting control doors are arranged on one sides of the main precipitation separation chamber and the auxiliary precipitation separation chamber before the filtering of the filter screen.
Preferably, the coalbed methane collection device comprises a drying tank and a vacuum gas collecting bottle, the vacuum gas collecting bottle is connected with the drying tank through a pipeline, and the main precipitation separation chamber and the auxiliary precipitation separation chamber of the first precipitation separation tank and the fourth precipitation separation tank are communicated with the drying tank through pipelines.
Preferably, the water pump is installed to one side that main sedimentation separating chamber and vice sedimentation separating chamber of fourth sedimentation separating tank lie in after the filter screen filters, also install the water pump on the purification water basin.
Preferably, pressure gauges are arranged on a pipeline between the vacuum gas collecting bottle and the drying tank and on the vacuum gas collecting bottle.
The invention has the advantages that: the gas-water-coal fine separation and water purification cyclic treatment test method provided by the invention can simulate a high-concentration gas, water and coal mixture generated in the in-situ coal bed gas development process of a structural coal development area in a test room, realize the fine separation, collection and water purification cyclic treatment test of gas, water and coal, and can collect a water sample for data analysis in the test process. The device has the advantages of high controllable degree, easy control, convenient installation, simple operation, safety and reliability.
Drawings
FIG. 1 is a schematic structural diagram of the testing apparatus of the present invention.
FIG. 2 is a schematic structural diagram of a second precipitation separation tank.
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.
A gas-water-coal fine separation, collection and water purification cyclic treatment test method comprises the following steps:
(1) connecting all pipelines in the test device, closing the coal slime clearing control door 17 and the sampling and coal slime clearing port 16 of each purification tank, and checking the tightness of the device;
(2) ① when the mixture is mainly coal, injecting coal-water mixture into the main precipitation separation chamber 10 of the first precipitation separation tank 5, wherein the gas in the mixture is light and gathers on the top of the device and moves to the vacuum gas collection bottle 19 through the pipeline, ② when the mixture is mainly water (in the ① case, the water-coal ratio of the final purified product is not up to standard, but mainly water), injecting water-coal mixture into the main precipitation separation chamber 10 of the fourth precipitation separation tank 8, wherein the gas in the mixture is light and gathers on the top of the device and moves to the vacuum gas collection bottle 19 through the pipeline;
(3) ① the coal-water mixture flows into the first precipitation separation tank 5, is filtered by the filter screen 13 and deposited along with gravity, overflows the overflow port 12, then sequentially passes through the second precipitation separation tank 6 and the third precipitation separation tank 7 for separation and deposition, finally enters the purification water tank 3 for deposition, and is circulated by the water pump 20, the water with the water quality up to the standard can be used for continuous operation, and needs to be filtered repeatedly if the water does not meet the requirement, in the whole process, the gas in the mixture is transported into the vacuum gas collection bottle through the coal bed gas guide and discharge pipeline 15 and each connecting pipeline, ② the water-coal mixture mainly comprising water flows into the fourth precipitation separation tank 8, is filtered by the filter screen 13 and deposited along with gravity, and the filtered water is circulated through the water pump 20, and the gas in the mixture is transported into the vacuum gas collection bottle 19 through the pipeline;
(4) the gas entering the vacuum gas collecting bottle 19 firstly absorbs moisture through the drying tank 18, meanwhile, pressure gauges 21 on a pipeline between the vacuum gas collecting bottle 19 and the drying tank 18 and on the vacuum gas collecting bottle 19 are observed, and when the pressure gauge 21 on the vacuum gas collecting bottle 19 is larger than the pressure gauge 21 on the pipeline between the vacuum gas collecting bottle 19 and the drying tank 18, the vacuum gas collecting bottle 19 is replaced;
(5) along with the purification, the coal slime deposited at the bottom parts of the first precipitation separation tank 5, the second precipitation separation tank 6, the third precipitation separation tank 7 and the fourth precipitation separation tank 8 becomes thicker and thicker, and the coal slime needs to be cleaned and transported in order not to influence the subsequent purification; during cleaning, the auxiliary precipitation separation chambers 11 are used for continuing the test, and the coal slime is cleaned through the coal slime cleaning control door 17 and the sampling and coal slime cleaning port 16 of each main precipitation separation chamber 10;
(6) after the test is finished, cleaning each test device for the next use;
the utility model provides a test device that is used for meticulous separation of gas-water-coal, collects and water purification cycle processing test method, includes tertiary precipitation separator 1, one-level precipitation separator 2, purification water tank 3, coal bed gas collection device 4, tertiary precipitation separator 1 and purification water tank 3 are connected, coal bed gas collection device 4 and tertiary precipitation separator 1, one-level precipitation separator 2 are connected.
Preferably, the third-level precipitation separation device comprises a first precipitation separation tank 5, a second precipitation separation tank 6 and a third precipitation separation tank 7, the first-level precipitation separation device 2 comprises a fourth precipitation separation tank 8, partition walls 9 are arranged in the first precipitation separation tank 5, the second precipitation separation tank 6, the third precipitation separation tank 7 and the fourth precipitation separation tank 8, the partition walls 9 divide the first precipitation separation tank 5, the second precipitation separation tank 6, the third precipitation separation tank 7 and the fourth precipitation separation tank 8 into a main precipitation separation chamber 10 and an auxiliary precipitation separation chamber 11, overflow ports 12 are arranged on the main precipitation separation chamber 10 and the auxiliary precipitation separation chamber 11 of the first precipitation separation tank 5, the second precipitation separation tank 6 and the third precipitation separation tank 7, the main precipitation separation chambers 10 of the first precipitation separation tank 5, the second precipitation separation tank 6 and the third precipitation separation tank 7 are communicated with each other through the overflow ports 12, the auxiliary precipitation separation chamber 11 of the first precipitation separation tank 5, the second precipitation separation tank 6 and the third precipitation separation tank 7 is communicated through an overflow port 12, the main precipitation separation chamber 10 and the auxiliary precipitation separation chamber 11 of the third precipitation separation tank 7 are communicated through an overflow port 12 and a purification water tank 3, a filter screen 13 is arranged in the main precipitation separation chamber 10 and the auxiliary precipitation separation chamber 11, coal bed gas guide and discharge pipelines 15 are arranged between the main precipitation separation chamber 10 and the auxiliary precipitation separation chamber 11 of the first precipitation separation tank 5 and the fourth precipitation separation tank 8 and between the auxiliary precipitation separation chamber 11 and the main precipitation separation chamber 10 of the first precipitation separation tank 5 and the second precipitation separation tank 6 and the third precipitation separation tank 7 respectively, and coal bed gas guide and discharge pipelines 15 are also arranged between the main precipitation separation chamber 10 and the auxiliary precipitation separation chamber 11 of the third precipitation separation tank 7 and the purification water tank 3, one sides of the main precipitation separation chamber 10 and the auxiliary precipitation separation chamber 11, which are positioned after the filtration of the filter screen 13, are provided with a sampling and coal slime clearing port 16, and one sides of the main precipitation separation chamber 10 and the auxiliary precipitation separation chamber 11, which are positioned before the filtration of the filter screen 13, are provided with a coal slime clearing control door 17.
Preferably, the coal bed gas collecting device 4 comprises a drying tank 18 and a vacuum gas collecting bottle 19, the vacuum gas collecting bottle 19 and the drying tank 18 are connected through a pipeline, and the primary precipitation separation chamber 10 and the secondary precipitation separation chamber 11 of the first precipitation separation tank 5 and the fourth precipitation separation tank 8 are communicated with the drying tank 18 through a pipeline.
Preferably, the water pump 20 is installed on both sides of the main precipitation separation chamber 10 and the auxiliary precipitation separation chamber 11 of the fourth precipitation separation tank 8 after being filtered by the filter screen 13, and the water pump 20 is also installed on the purification water tank 3.
Preferably, a pressure gauge 21 is arranged on the pipeline between the vacuum gas collecting bottle 19 and the drying tank 18 and on the vacuum gas collecting bottle.
The gas-water-coal fine separation and water purification cyclic treatment test method provided by the invention can simulate a high-concentration gas, water and coal mixture generated in the in-situ coal bed gas development process of a structural coal development area in a test room, realize the fine separation, collection and water purification cyclic treatment test of gas, water and coal, and can collect a water sample for data analysis in the test process. The device has the advantages of high controllable degree, easy control, convenient installation, simple operation, safety and reliability.
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 (1)
1. A gas-water-coal fine separation, collection and water purification cyclic treatment test method is characterized by comprising the following steps:
(1) judging the content of water and coal in the coal-water mixture, and when the coal-water mixture is mainly water, performing primary precipitation separation on the coal-water mixture, and when the coal-water mixture is mainly coal, performing tertiary precipitation separation on the coal-water mixture; sampling in real time to analyze data in the process of precipitation separation;
(2) collecting gas in the coal-water mixture in the precipitation separation process in the step (1);
(3) the water quality after precipitation separation can be used for circulating operation when reaching the standard, and primary precipitation separation is continued when not reaching the standard;
(4) after the test is finished, cleaning each device for the next use;
the test device for the test method comprises a three-level precipitation separation device, a one-level precipitation separation device, a purification water tank and a coal bed gas collection device, wherein the three-level precipitation separation device is connected with the purification water tank, and the coal bed gas collection device is connected with the three-level precipitation separation device and the one-level precipitation separation device;
the three-level precipitation separation device comprises a first precipitation separation tank, a second precipitation separation tank and a third precipitation separation tank, the first-level precipitation separation device comprises a fourth precipitation separation tank, the first precipitation separation tank, the second precipitation separation tank, the third precipitation separation tank and the fourth precipitation separation tank are internally provided with a partition wall body, the partition wall body divides the first precipitation separation tank, the second precipitation separation tank, the third precipitation separation tank and the fourth precipitation separation tank into a main precipitation separation chamber and an auxiliary precipitation separation chamber, the main precipitation separation chamber and the auxiliary precipitation separation chamber of the first precipitation separation tank, the second precipitation separation tank and the third precipitation separation tank are respectively provided with an overflow port, the main precipitation separation chamber of the first precipitation separation tank, the second precipitation separation tank and the third precipitation separation tank are mutually communicated through the overflow ports, and the first precipitation separation tank, the second precipitation separation tank and the third precipitation separation tank are mutually communicated through the overflow ports, The vice sedimentation separation room of third sedimentation separation pond passes through the overflow mouth intercommunication, main sedimentation separation room, the vice sedimentation separation room of third sedimentation separation pond all communicate through overflow mouth and purifying water tank, all install the filter screen in main sedimentation separation room and the vice sedimentation separation room, all be provided with coal water mixture on the main sedimentation separation room and the vice sedimentation separation room of first sedimentation separation pond, fourth sedimentation separation pond and insert the mouth, also install coal bed gas drainage pipe between the main sedimentation separation room of first sedimentation separation pond, second sedimentation separation pond, third sedimentation separation pond, the vice sedimentation separation room between the vice sedimentation separation room, also install coal bed gas drainage pipe between the main sedimentation separation room of third sedimentation separation pond, vice sedimentation separation room and the purifying water tank, one side that main sedimentation separation room and vice sedimentation separation room are located the filter screen and filter back all is provided with the sample and the coal slime clearance mouth, the main precipitation separation chamber and the auxiliary precipitation separation chamber are provided with coal slime clearing control doors on one sides before being filtered by the filter screens;
the coal bed gas collecting device comprises a drying tank and a vacuum gas collecting bottle, the vacuum gas collecting bottle is connected with the drying tank through a pipeline, and a main precipitation separation chamber and an auxiliary precipitation separation chamber of the first precipitation separation tank and the fourth precipitation separation tank are communicated with the drying tank through pipelines;
the main precipitation separation chamber and the auxiliary precipitation separation chamber of the fourth precipitation separation tank are provided with water pumps at one sides after being filtered by the filter screens, and the water purification tank is also provided with a water pump;
pressure gauges are arranged on the pipeline between the vacuum gas collecting bottle and the drying tank and on the vacuum gas collecting bottle.
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| CN111812295B (en) * | 2020-07-21 | 2023-07-21 | 安徽理工大学 | Efficient separation, recovery treatment and cyclic utilization test device for coal-water gas mixture |
| CN111830231B (en) * | 2020-07-21 | 2023-07-21 | 安徽理工大学 | Efficient separation, recovery treatment and cyclic utilization test method for coal-water gas mixture |
| CN114177733B (en) * | 2021-12-01 | 2023-06-09 | 武汉工程大学 | System for separating coal and water for coal bed gas drainage and gas production and purifying water and control method |
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| CN201581884U (en) * | 2010-01-25 | 2010-09-15 | 任源峰 | Simple separator for coal bed gas well extraction |
| CN206134103U (en) * | 2016-08-02 | 2017-04-26 | 河南理工大学 | Coalbed gas takes out gas production grain slag separation module and plans test device |
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| DE2739690A1 (en) * | 1977-09-02 | 1979-03-08 | Willy F Palmer | METHOD AND DEVICE FOR CLEANING WASTE WATER |
| US6929753B1 (en) * | 2003-09-22 | 2005-08-16 | Aqua-Envirotech Mfg., Inc. | Coal bed methane wastewater treatment system |
| CN102392676B (en) * | 2011-09-14 | 2013-07-17 | 成都晟鑫机电设备有限公司 | Integrated device for separating gas, water and slag |
| CN202348181U (en) * | 2011-12-15 | 2012-07-25 | 郑州远见矿用设备有限公司 | Gas-proof nozzle orifice water-coal-gas separator |
| CN103920310B (en) * | 2014-01-16 | 2016-02-17 | 河南工程学院 | A kind of underground coal mine gas liquor release separator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201581884U (en) * | 2010-01-25 | 2010-09-15 | 任源峰 | Simple separator for coal bed gas well extraction |
| CN206134103U (en) * | 2016-08-02 | 2017-04-26 | 河南理工大学 | Coalbed gas takes out gas production grain slag separation module and plans test device |
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