CN108776041A - A kind of air water jet segment from, collect and Water warfare circular treatment test method - Google Patents

Abstract

The invention discloses a test method for gas-water coal fine separation, collection and water purification cycle treatment, including (1) judging the content of water and coal in the coal-water mixture, and when the coal-water mixture is mainly water, the coal-water mixture is First-stage precipitation separation, when the coal-water mixture is dominated by coal, the coal-water mixture is subjected to three-stage precipitation separation; during the process of precipitation separation, real-time sampling is carried out for data analysis; (2) During the process of step (1) precipitation separation , to collect the gas in the coal-water mixture; (3) If the water quality after sedimentation and separation reaches the standard, it can be used for recycling operations, and if it does not meet the standard, it will continue to carry out steps such as primary sedimentation and separation. The test method of the present invention can simulate the high-concentration gas, water and coal mixture produced in the in-situ coalbed methane development process in the tectonic coal development area in the laboratory, realize the fine separation, collection and water purification cycle treatment test of gas, water and coal, and Able to collect water samples for data analysis during the test.

Description

A test method for gas-water coal fine separation, collection and water purification cycle treatment

technical field

The invention relates to a test method for simulating the separation of gas, water and coal and water purification during the pressure relief and development of in-situ coalbed methane horizontal wells in a laboratory, and in particular to a test method for realizing the development of structural coal The test method for high-efficiency and rapid separation of gas, water, and coal and water resource purification treatment produced during the pressure relief development process of in-situ coalbed methane horizontal wells in the region belongs to the field of coalbed methane mining.

Background technique

With the development of my country's national economy, the supply situation of traditional energy is becoming increasingly severe, and the greenhouse effect produced by the large amount of carbon dioxide emitted in human activities has seriously threatened the ecological security of the whole nature. As a result, coalbed methane has received widespread attention as a new type of clean energy.

Structural coal is developed in my country, and tectonic coal areas are rich in coalbed methane resources. The development of coalbed methane is of great significance to alleviate the tension of oil and gas resources in my country, reduce the degree of mine disasters, and reduce greenhouse gas emissions. Realizing in-situ coalbed methane development in tectonic coal development areas will inevitably produce a large amount of gas, water, and coal-water mixtures. Important theoretical and technical issues in the development of in-situ coalbed methane horizontal wells are also important topics in the current research on improving the production of coalbed methane wells in structural coal development areas. At present, the structural coal development area is a restricted area for in-situ coalbed methane development. There are no in-depth reports on the development of structural coal development areas using in-situ coalbed methane, and there are no studies and studies on the efficient and rapid separation of gas, water, and coal, and the purification of water resources. reports. In-situ coalbed methane development in tectonic coal development areas will produce a large amount of high-viscosity fluid coal-water mixtures containing coal, water and gas. The efficient and rapid separation of water and coal and water purification cycle treatment can realize efficient coal mining, gas recovery and water resource recycling. It is particularly critical for the effective application of in-situ horizontal well development technology in structurally developed areas.

In view of this, the separation, collection and treatment of high-concentration gas, water, and coal-coal-water mixture produced in the laboratory by simulating the in-situ coalbed methane development process in the structural coal development area are very important for the realization of the in-situ coalbed methane development in the structural coal development area. It is very important to design a test method that can be used in the laboratory to realize the fine separation, collection and water purification cycle treatment of high-concentration gas, water, and coal produced in the in-situ coalbed methane development process in structural coal development areas. It is an urgent subject to be solved in the research of in-situ coalbed methane mining, which has important theoretical guidance for in-situ coalbed methane mining in structural coal development areas. However, the existing test methods do not simulate the separation, collection and treatment of high-concentration gas, water, and coal-coal-water mixture in in-situ coalbed methane mining in tectonic coal development areas, and the test methods do not collect test samples in real time to achieve real-time sampling. Test and analyze data to realize real-time monitoring.

Contents of the invention

Aiming at the deficiencies of the prior art, the present invention provides a test method that can be used to realize the fine separation, collection and water purification cycle treatment of high-concentration gas, water and coal produced in the in-situ coalbed methane development process in the structural coal development area in the laboratory .

The present invention realizes solving above-mentioned technical problem by following technical means:

A test method for gas-water coal fine separation, collection and water purification cycle treatment, comprising the following steps:

(1) Determine the content of water and coal in the coal-water mixture. When the coal-water mixture is dominated by water, the coal-water mixture is subjected to primary sedimentation and separation. When the coal-water mixture is mainly coal, the coal-water mixture is subjected to third-stage precipitation Separation; in the process of precipitation separation, real-time sampling for data analysis;

(2) in the process of step (1) precipitation separation, the gas in the coal-water mixture is collected;

(3) If the water quality after sedimentation and separation reaches the standard, it can be used for recycling operations;

(4) After the test is completed, clean the equipment for the next use.

A test device for gas-water coal fine separation, collection, and water purification cycle treatment test method, including a three-stage sedimentation and separation device, a first-stage sedimentation and separation device, a purified water pool, and a coalbed gas collection device. The three-stage sedimentation and separation device It is connected with a purified water pool, and the coalbed gas collection device is connected with a third-stage sedimentation separation device and a first-stage sedimentation separation device.

Preferably, the three-stage precipitation separation device includes a first precipitation separation tank, a second precipitation separation tank and a third precipitation separation tank, the primary precipitation separation device includes a fourth precipitation separation tank, and the first precipitation separation tank , the second sedimentation and separation tank, the third sedimentation and separation tank, and the fourth sedimentation and separation tank are all equipped with a partition wall, which divides the first sedimentation and separation tank, the second sedimentation and separation tank, the third sedimentation and separation tank, the second sedimentation and separation tank The four sedimentation separation tanks are all divided into main sedimentation separation chambers and auxiliary sedimentation separation chambers, and the main sedimentation separation chambers and auxiliary sedimentation separation chambers of the first sedimentation separation tank, the second sedimentation separation tank, and the third sedimentation separation tank are all provided with The overflow port, the main sedimentation separation chamber of the first sedimentation separation tank, the second sedimentation separation tank, and the third sedimentation separation tank communicates with each other through the overflow port, the first sedimentation separation tank, the second sedimentation separation tank, the second sedimentation separation tank The auxiliary sedimentation separation chamber of the three sedimentation separation tanks is communicated through the overflow port, and the main sedimentation separation chamber and the auxiliary sedimentation separation chamber of the third sedimentation separation tank are all communicated with the purified water pool through the overflow port, and the main sedimentation separation chamber and the auxiliary sedimentation separation chamber Filter screens are installed in the sedimentation and separation chambers, the main sedimentation separation chamber and the auxiliary sedimentation separation chamber of the first sedimentation separation tank and the fourth sedimentation separation tank are provided with coal-water mixture inlets, the first sedimentation separation tank, Between the main sedimentation separation chamber and the auxiliary sedimentation separation chamber of the second sedimentation separation tank and the third sedimentation separation tank, coalbed methane drainage pipes are installed. The main sedimentation separation chamber and auxiliary sedimentation separation chamber of the third sedimentation separation tank There is also a coalbed methane drainage pipeline installed between the purification chamber and the purification pool. The main sedimentation separation chamber and the auxiliary sedimentation separation chamber are located on the side after the filter screen is filtered and are equipped with sampling and slime removal ports. The side of the separation chamber located before the screen is filtered is provided with a slime removal control door.

Preferably, the coalbed methane collection device includes a drying tank and a vacuum gas collecting bottle, the vacuum gas collecting bottle and the drying tank are connected by pipelines, and the main sedimentation and separation of the first sedimentation separation tank and the fourth sedimentation separation tank Both the chamber and the secondary precipitation separation chamber communicate with the drying tank through pipelines.

Preferably, the main sedimentation separation chamber and the auxiliary sedimentation separation chamber of the fourth sedimentation separation tank are equipped with water pumps on the side after filtering through the filter screen, and the water purification tank is also equipped with water pumps.

Preferably, pressure gauges are installed on the pipeline between the vacuum collecting bottle and the drying tank and on the vacuum collecting bottle.

The advantage of the present invention is that: the test method of gas-water-coal fine separation and water purification cycle treatment provided by the present invention can simulate the high-concentration gas, water and coal mixture produced in the in-situ coalbed methane development process in the tectonic coal development area in the laboratory, Realize the fine separation, collection and water purification cycle treatment test of gas, water and coal, and can collect water samples for data analysis during the test. The device has high controllability, easy control, convenient installation, simple operation, safety and reliability.

Description of drawings

Figure 1 is a schematic structural view of the test device of the present invention.

Fig. 2 is a schematic structural diagram of the second sedimentation and separation tank.

Detailed ways

In order to make the purpose, 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 in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

A test method for gas-water coal fine separation, collection and water purification cycle treatment, comprising the following steps:

(1) All the pipelines in the test device are connected, and the coal slime removal control door 17 and the sampling and coal slime removal port 16 of each purification tank are closed, and the tightness of the inspection device is checked;

(2) ① When the mixture is mainly coal, inject the coal-water mixture into the main sedimentation separation chamber 10 of the first sedimentation separation tank 5, the gas in the mixture is light in weight, gathers at the top of the device, and is transported to the vacuum gas collection bottle through the pipeline 19; 2. When the mixture is mainly water (can be the above ① situation, the final purified product water-coal ratio is still not up to standard, but the situation is mainly water), to the main sedimentation separation chamber 10 of the fourth sedimentation separation tank 8 Inject the water-coal mixture, the gas in the mixture is light in quality, gathers at the top of the device, and is transported to the vacuum gas collecting bottle 19 through the pipeline;

(3) 1. the coal-water mixture flows into the first sedimentation separation tank 5, is filtered through the filter screen 13 and accompanied by gravity sedimentation, overflows the overflow port 12, and then passes through the second sedimentation separation tank 6 and the third sedimentation separation tank 7 successively for separation, Precipitate, finally enter the purified water tank 3 for sedimentation, and be circulated by the water pump 20; the water whose water quality reaches the standard can be used to continue the operation, and if it does not meet the requirements, it needs to be filtered repeatedly; during the whole process, the gas in the mixture passes through the coalbed methane drainage pipeline 15 and each connecting pipeline Moved to the vacuum gas collection bottle; ②The water-coal mixture mainly composed of water flows into the fourth sedimentation and separation tank 8, is filtered through the filter screen 13 and is accompanied by gravity sedimentation, and the filtered water is circulated through the water pump 20; the gas in the mixture passes through The pipeline is moved into the vacuum gas cylinder 19;

(4) The gas that enters the vacuum gas collecting bottle 19 first absorbs moisture through the drying tank 18, and simultaneously observe the pressure gauge 21 on the pipeline between the vacuum gas collecting bottle 19 and the drying tank 18 and on the vacuum gas collecting bottle 19, when the vacuum When the pressure gauge 21 on the gas collection bottle 19 is greater than the pressure gauge 21 on the pipeline between the vacuum gas collection bottle 19 and the drying tank 18, replace the vacuum gas collection bottle 19;

(5) along with the carrying out of purifying, the coal slime that precipitates in the bottom of the first sedimentation separation tank 5, the second sedimentation separation tank 6, the third sedimentation separation tank 7, the fourth sedimentation separation tank 8 is getting thicker and thicker, in order not to affect For the follow-up purification, it is necessary to remove the coal slime; when cleaning, use each auxiliary sedimentation separation chamber 11 to continue the test, and pass through the coal slime removal control door 17 and the sampling and coal slime removal port of each main sedimentation separation chamber 10 16 carry out coal slime removal;

(6) After the test is completed, clean each test device and prepare for the next use;

A test device for fine separation and collection of gas-water coal and water purification cycle treatment test method, including a three-stage sedimentation and separation device 1, a first-stage sedimentation and separation device 2, a purified water pool 3, and a coalbed methane collection device 4. The three The first-stage sedimentation and separation device 1 is connected to the purified water tank 3 , and the coalbed methane collection device 4 is connected to the third-stage sedimentation and separation device 1 and the first-stage sedimentation and separation device 2 .

Preferably, the three-stage precipitation separation device includes a first precipitation separation tank 5, a second precipitation separation tank 6 and a third precipitation separation tank 7, and the primary precipitation separation device 2 includes a fourth precipitation separation tank 8, the In the first sedimentation separation tank 5, the second sedimentation separation tank 6, the third sedimentation separation tank 7, and the fourth sedimentation separation tank 8, a partition wall 9 is installed, and the partition wall 9 separates the first sedimentation separation tank 5, The second precipitation separation tank 6, the third precipitation separation tank 7, and the fourth precipitation separation tank 8 are all divided into the main precipitation separation chamber 10 and the auxiliary precipitation separation chamber 11, the first precipitation separation tank 5, the second precipitation separation tank 6 , the main sedimentation separation chamber 10 of the third sedimentation separation tank 7 and the auxiliary sedimentation separation chamber 11 are all provided with an overflow port 12, the first sedimentation separation tank 5, the second sedimentation separation tank 6, the third sedimentation separation tank 7 The main sedimentation separation chamber 10 of the main sedimentation separation chamber 10 communicates with each other through the overflow port 12, and the auxiliary sedimentation separation chamber 11 of the first sedimentation separation tank 5, the second sedimentation separation tank 6, and the third sedimentation separation tank 7 communicates through the overflow port 12, so The main sedimentation separation chamber 10 and the auxiliary sedimentation separation chamber 11 of the third sedimentation separation tank 7 are all communicated with the purified water pool 3 through the overflow port 12, and filter screens are installed in the main sedimentation separation chamber 10 and the auxiliary sedimentation separation chamber 11 13. The main sedimentation separation chamber 10 and the auxiliary sedimentation separation chamber 11 of the first sedimentation separation tank 5 and the fourth sedimentation separation tank 8 are provided with a coal-water mixture inlet 14, and the first sedimentation separation tank 5, the second sedimentation separation tank Between the main sedimentation and separation chambers 10 of the second sedimentation separation tank 6 and the third sedimentation separation tank 7, and between the auxiliary sedimentation separation chambers 11, coalbed methane drainage pipes 15 are installed. A coalbed methane drainage pipeline 15 is also installed between the chamber 10, the auxiliary sedimentation separation chamber 11 and the purified water tank 3. The main sedimentation separation chamber 10 and the auxiliary sedimentation separation chamber 11 are located on the side after the filter screen 13 is filtered. Sludge removal port 16, the main sedimentation separation chamber 10 and the auxiliary sedimentation separation chamber 11 are all provided with a coal slime removal control door 17 on the side before the filter screen 13 is filtered.

Preferably, the coalbed methane collection device 4 includes a drying tank 18 and a vacuum gas collecting bottle 19, the vacuum gas collecting bottle 19 and the drying tank 18 are connected by pipelines, the first sedimentation separation tank 5, the fourth sedimentation tank Both the main precipitation separation chamber 10 and the secondary precipitation separation chamber 11 of the separation tank 8 communicate with a drying tank 18 through pipelines.

Preferably, the main sedimentation separation chamber 10 and the auxiliary sedimentation separation chamber 11 of the fourth sedimentation separation tank 8 are equipped with a water pump 20 on the side after filtering by the filter screen 13 , and the water pump 20 is also installed on the purified water tank 3 .

Preferably, a pressure gauge 21 is installed on the pipeline between the vacuum collecting bottle 19 and the drying tank 18 and on the vacuum collecting bottle.

A gas-water-coal fine separation and water purification cycle treatment test method provided by the invention can simulate the high-concentration gas, water, and coal mixture produced during the in-situ coalbed methane development process in the tectonic coal development area in the laboratory, and realize the gas, water, and coal Fine separation, collection and water purification cycle treatment test, and can collect water samples for data analysis during the test. The device has high controllability, easy control, convenient installation, simple operation, safety and reliability.

It should be noted that in this article, if there are relational terms such as first and second, etc., they are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that these entities or operations Any such actual relationship or order exists between. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be described in the foregoing embodiments Modifications are made to the recorded technical solutions, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (6)

1. a kind of air water jet segment from, collect with Water warfare circular treatment test method, which is characterized in that including following step Suddenly：

(1) judge the content of water and coal in coal-water mixture, when coal-water mixture with water is main, coal-water mixture is subjected to level-one Precipitation separation, coal-water mixture with coal be it is main when, by coal-water mixture carry out three-level precipitation separation；In the process of precipitation separation In, real time sample carries out data analysis；

(2) during step (1) is precipitated and detached, gas in coal-water mixture is collected；

(3) water quality reaching standard after precipitation separation then can be used for cycle operation, not up to standard, continue level-one precipitation separation；

(4) each equipment is cleaned after the completion of testing, in case next time uses.

2. one kind for a kind of air water jet as described in claim 1 segment from, collect and Water warfare circular treatment experiment side The experimental rig of method, it is characterised in that：Including three-level precipitation separation device, level-one precipitation separation device, purification water pool, coal bed gas Collection device, the three-level precipitation separation device are connected with purification water pool, the coal bed gas collection device and three-level precipitation separation Device, the connection of level-one precipitation separation device.

3. it is according to claim 2 it is a kind of for a kind of air water jet as described in claim 1 segment from, collect and water Decontamination cycle handles the experimental rig of test method, it is characterised in that：The three-level precipitation separation device includes the first precipitation point Separate tank is precipitated from pond, the second precipitation separate tank and third, the level-one precipitation separation device includes the 4th precipitation separate tank, institute State the first precipitation separate tank, second precipitation separate tank, third precipitation separate tank, the 4th precipitation separate tank in be fitted with ddividing wall Body, the segmenting wall body precipitate separate tank, the second precipitation separate tank, third precipitation separate tank, the 4th precipitation separate tank by first All it is divided into primary precipitate separation chamber and secondary precipitation separation chamber, the first precipitation separate tank, the second precipitation separate tank, third precipitation Overflow port is both provided in the primary precipitate separation chamber of separate tank and secondary precipitation separation chamber, the first precipitation separate tank, second are sunk Shallow lake separate tank, third precipitation separate tank primary precipitate separation chamber be interconnected by overflow port, the first precipitation separate tank, the The secondary precipitation separation chamber that two precipitation separate tanks, third precipitate separate tank is connected to by overflow port, the third precipitation separate tank Primary precipitate separation chamber, secondary precipitation separation chamber are all connected to by overflow port with purification water pool, the primary precipitate separation chamber and secondary precipitation Strainer, the first precipitation separate tank, the primary precipitate separation chamber of the 4th precipitation separate tank and secondary precipitation are fitted in separation chamber Coal-water mixture access port, the first precipitation separate tank, the second precipitation separate tank, third precipitation point are both provided in separation chamber Between primary precipitate separation chamber from pond, coal bed gas guide pipeline, the third precipitation point are fitted between secondary precipitation separation chamber Primary precipitate separation chamber, secondary precipitate from pond are also equipped with coal bed gas guide pipeline between separation chamber and purification water pool, primary precipitate point Be located at that the side after strainer filtering is both provided with sampling and coal slime clears mouth from room and secondary precipitation separation chamber, primary precipitate separation chamber with Pair precipitation separation chamber, which is located at the side before strainer filtering and is both provided with coal slime, clears control door.

4. it is according to claim 3 it is a kind of for a kind of air water jet as described in claim 1 segment from, collect and water Decontamination cycle handles the experimental rig of test method, it is characterised in that：The coal bed gas collection device includes drying chamber and vacuum Gas bottle, the vacuum gas bottle are connected with drying chamber by pipeline, the first precipitation separate tank, the 4th precipitation separation The primary precipitate separation chamber in pond is all connected to by pipeline with drying chamber with pair precipitation separation chamber.

5. it is according to claim 3 it is a kind of for a kind of air water jet as described in claim 1 segment from, collect and water Decontamination cycle handles the experimental rig of test method, it is characterised in that：It is described 4th precipitation separate tank primary precipitate separation chamber and Pair precipitation separation chamber is located at the side after strainer filtering and is fitted with water pump, and water pump is also equipped on the purification water pool.

6. it is according to claim 4 it is a kind of for a kind of air water jet as described in claim 1 segment from, collect and water Decontamination cycle handles the experimental rig of test method, it is characterised in that：On pipeline between the vacuum gas bottle and drying chamber And it is fitted with pressure gauge on vacuum gas bottle.