CN102182926A - Negative pressure adjustment system of coalbed methane collecting and conveying system in coal mining area and adjustment method of negative pressure adjustment system - Google Patents
Negative pressure adjustment system of coalbed methane collecting and conveying system in coal mining area and adjustment method of negative pressure adjustment system Download PDFInfo
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- CN102182926A CN102182926A CN2011100465950A CN201110046595A CN102182926A CN 102182926 A CN102182926 A CN 102182926A CN 2011100465950 A CN2011100465950 A CN 2011100465950A CN 201110046595 A CN201110046595 A CN 201110046595A CN 102182926 A CN102182926 A CN 102182926A
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Abstract
The invention relates to the field of coal mine safety, in particular to a negative pressure adjustment system of a coalbed methane collecting and conveying system in a coal mining area. The negative pressure adjustment system comprises a methane concentration sensor, a negative pressure regulation device and a control device, wherein the methane concentration sensor and the negative pressure regulation device are arranged in a pipe of a coalbed methane collecting and conveying pipe network in the coal mining area at interval; and the control device is used for receiving methane concentration data acquired by the methane concentration sensor and judging whether the methane concentration data is less than a threshold value and controlling the negative pressure regulation device, at one side close to a pump, of the corresponding methane concentration sensor to reduce atmospheric pressure in the pipe if the methane concentration data is less than a threshold value. The invention also discloses a coalbed methane conveying system in the coal mining area and a negative pressure adjustment method of the coalbed methane conveying system. By the negative pressure adjustment system and method for the coalbed methane conveying system in the coal mining area, the methane concentration of the coalbed methane in the coalbed methane collecting and conveying pipe network is monitored in real time, the methane concentration of the coalbed methane is controlled by adjusting the negative pressure of the pipe, the safe conveying of the underground extracted coalbed methane in the coal mining area is realized, and the utilization efficiency of the extracted coalbed methane is improved.
Description
Technical field
The present invention relates to the safety of coal mines field, particularly a kind of negative pressure regulating system and negative pressure regulating method that is used for coal field coal-seam gas gathering system.
Background technique
Coal-seam gas claims coal-bed gas again, coal bed methane, and it is to compose the natural-gas of storage formula certainly that is stored in coal seam and Gu Yan through the biochemistry pyrolysis with absorption or free state in the coal-forming process, belongs to unconventional rock gas, it is the chemical industry and the energy raw material of high-quality.
The concentration of coal field extraction coal-seam gas is by the decision of the sealing state of the gathering line of its pumping method technology and extraction system, under the condition that the sealing state of concrete extraction gathering line is determined, the size of gas negative pressure has determined the height of its extraction concentration in the collector and delivery pipe road of extraction system.At present, in the coal-seam gas of coal field down-hole extraction, minority extraction pumping plant concentration preferably is about 50% only also, has the extraction concentration of the pumping plant more than 60% to be lower than 30%.This causes the significant wastage of extraction system capability on the one hand, on the other hand pumping plant extraction concentration be lower than 30% this part in, there is very most concentration also just in time to be in the explosion ratio scope, thereby make extraction, collection fail, and even all have very big potential safety hazard in this part coal-seam gas process of emptying.Simultaneously, coal-seam gas concentration is crossed to hang down and also can its utilization be had a negative impact.
Therefore, need a kind of system to regulate, guarantee that the coal-seam gas methane concentration of extraction is in higher range, realize the safe transport of coal field down-hole extraction coal-seam gas, improve extraction gas utilization efficient extraction pipe network gas negative pressure under the whole coal mine.
Summary of the invention
In view of this, in order to address the above problem, the invention discloses a kind of coal field coal-seam gas gathering system negative pressure regulating system, can monitor in real time the methane concentration of coal-seam gas in the coal-seam gas collection transmission pipe network, and, control the methane concentration of coal-seam gas by regulating the negative pressure of pipeline.
The object of the present invention is achieved like this: coal field coal-seam gas gathering system negative pressure regulating system, comprise sensing methane concentration device, negative pressure adjusting device and control gear, described sensing methane concentration device and negative pressure adjusting device are arranged at intervals in the pipeline of coal field coal-seam gas collection transmission pipe network, control gear receives the methane concentration data that the sensing methane concentration device is gathered, judge that whether these methane concentration data are less than threshold value, in this way, the negative pressure adjusting device of nearly pump one side of sensing methane concentration device of then control correspondence reduces the air pressure in the pipeline.
Further, described negative pressure adjusting device comprises negative pressure adjusting color controls and the electric valve that is arranged in the pipeline, the control signal of described negative pressure adjusting color controls receiving control device, and the folding degree of control electric valve is to regulate the air pressure in the pipeline.
Further, described electric valve is an electric butterfly valve.
Further, described threshold value is 70%.
The present invention also discloses a kind of coal field coal-seam gas gathering system negative pressure regulating method, comprises the steps:
1) the methane concentration data in the pipeline of collection of coal mine district coal-seam gas collection transmission pipe network, less than threshold value, then execution in step 2 as if the methane concentration data);
2) control step 1) negative pressure adjusting device of nearly pump one side in collection point reduces the air pressure in the pipeline.
Further, in the described step 1), threshold value is 70%.
Further, the electric valve in the described negative pressure adjusting device is an electric butterfly valve, described step 2) in, the control electric butterfly valve changes sealing surface switching degree, to reduce the air pressure in the pipeline.
Beneficial effect of the present invention is as follows:
1, can monitor methane concentration in the coal-seam gas extraction pipe network, when methane concentration is lower than predetermined threshold value in the pipeline, the control gear of system itself can send instruction to the pipeline negative pressure adjusting device automatically, regulates pipeline gas negative pressure, and then regulates the concentration that pipeline is carried coal-seam gas.
2, the present invention makes down-hole coal bed gas extraction pipe network have adaptivity, guarantee to carry in the pipeline coal-seam gas concentration to be in higher range, not only optimize the extraction system running state, but also realized the safe transport of coal field down-hole extraction coal-seam gas, improve extraction gas utilization efficient.
Description of drawings
In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing:
Fig. 1 shows the structural representation of coal field coal-seam gas gathering system negative pressure regulating system;
Fig. 2 shows the schematic flow sheet of coal field coal-seam gas gathering system negative pressure regulating method.
Embodiment
Referring to Fig. 1, coal field coal-seam gas gathering system negative pressure regulating system, be used for the negative pressure of the coal-seam gas collection transmission pipe network pipeline of coal field coal-seam gas gathering system is regulated, comprise sensing methane concentration device, negative pressure adjusting device and control gear, described sensing methane concentration device and negative pressure adjusting device are arranged at intervals in the pipeline of coal field coal-seam gas collection transmission pipe network, control gear receives the methane concentration data that the sensing methane concentration device is gathered, whether judge these methane concentration data less than threshold value, described threshold value is 70%.In this way, the negative pressure adjusting device of nearly pump one side of sensing methane concentration device of then control correspondence reduces the air pressure in the pipeline.
Described negative pressure adjusting device comprises negative pressure adjusting color controls and the electric valve that is arranged in the pipeline, the control signal of described negative pressure adjusting color controls receiving control device, and the folding degree of control electric valve is to regulate the air pressure in the pipeline.Best, electric valve is selected electric butterfly valve for use.
Referring to Fig. 2, the present invention also discloses a kind of coal field coal-seam gas gathering system negative pressure regulating method, comprises the steps:
1) the methane concentration data in the pipeline of collection of coal mine district coal-seam gas collection transmission pipe network, less than threshold value, preferred, described threshold value is 70% as if the methane concentration data, then execution in step 2);
2) control step 1) negative pressure adjusting device of nearly pump one side in collection point reduces the air pressure in the pipeline.If the electric valve in the negative pressure adjusting device is an electric butterfly valve, then controls electric butterfly valve and change sealing surface switching degree, to reduce the air pressure in the pipeline.
The above only preferably is not limited to the present invention for of the present invention, and obviously, those skilled in the art can carry out various changes and modification and not break away from the spirit and scope of the present invention the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (7)
1. coal field coal-seam gas gathering system negative pressure regulating system, it is characterized in that: comprise sensing methane concentration device, negative pressure adjusting device and control gear, described sensing methane concentration device and negative pressure adjusting device are arranged at intervals in the pipeline of coal field coal-seam gas collection transmission pipe network, control gear receives the methane concentration data that the sensing methane concentration device is gathered, judge that whether these methane concentration data are less than threshold value, in this way, the negative pressure adjusting device of nearly pump one side of sensing methane concentration device of then control correspondence reduces the air pressure in the pipeline.
2. coal field coal-seam gas gathering system negative pressure regulating system according to claim 1, it is characterized in that: described negative pressure adjusting device comprises negative pressure adjusting color controls and the electric valve that is arranged in the pipeline, the control signal of described negative pressure adjusting color controls receiving control device, the folding degree of control electric valve is to regulate the air pressure in the pipeline.
3. coal field coal-seam gas gathering system negative pressure regulating system according to claim 2, it is characterized in that: described electric valve is an electric butterfly valve.
4. according to each described coal field coal-seam gas gathering system negative pressure regulating system in the claim 1 to 3, it is characterized in that: described threshold value is 70%.
5. coal field coal-seam gas gathering system negative pressure regulating method is characterized in that: comprise the steps:
1) the methane concentration data in the pipeline of collection of coal mine district coal-seam gas collection transmission pipe network, less than threshold value, then execution in step 2 as if the methane concentration data);
2) control step 1) negative pressure adjusting device of nearly pump one side in collection point reduces the air pressure in the pipeline.
6. coal field coal-seam gas gathering system negative pressure regulating method as claimed in claim 5, it is characterized in that: in the described step 1), threshold value is 70%.
7. coal field coal-seam gas gathering system negative pressure regulating method as claimed in claim 5, it is characterized in that: the electric valve in the described negative pressure adjusting device is an electric butterfly valve, described step 2) in, the control electric butterfly valve changes sealing surface switching degree, to reduce the air pressure in the pipeline.
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| CN2011100465950A CN102182926A (en) | 2011-02-28 | 2011-02-28 | Negative pressure adjustment system of coalbed methane collecting and conveying system in coal mining area and adjustment method of negative pressure adjustment system |
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| CN2011100465950A CN102182926A (en) | 2011-02-28 | 2011-02-28 | Negative pressure adjustment system of coalbed methane collecting and conveying system in coal mining area and adjustment method of negative pressure adjustment system |
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Cited By (5)
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| CN106321141A (en) * | 2016-08-31 | 2017-01-11 | 郑州光力科技股份有限公司 | Method for automatically adjusting density of gas of coal mine pre-extracted in drill sites and device thereof |
| CN106437826A (en) * | 2016-12-14 | 2017-02-22 | 中国矿业大学 | Coal-bed gas extraction method achieving automatic adjustment of negative-pressure drill-hole zoning and source differentiating |
| CN106917605A (en) * | 2017-02-25 | 2017-07-04 | 太原理工大学 | A kind of abandoned mine goaf coal bed gas flooring-safe intelligent extraction system |
| CN107906216A (en) * | 2017-11-28 | 2018-04-13 | 徐州新南湖科技有限公司 | A kind of coal mine gas absorption and control valve |
| CN109026129A (en) * | 2018-08-15 | 2018-12-18 | 山东安益矿用设备有限公司 | Height negative pressure line intelligent conversion control technique |
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| CN109026129A (en) * | 2018-08-15 | 2018-12-18 | 山东安益矿用设备有限公司 | Height negative pressure line intelligent conversion control technique |
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Effective date of registration: 20130520 Address after: 400039 Chongqing Jiulongpo Erlang Branch City Road No. 6 Applicant after: China Coal Science and Industry Group Chongqing Research Institute Address before: 400037, No. three village, 55 bridge, Shapingba District, Chongqing Applicant before: Coal Scientific Research Institute Chongqing Institute |
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Application publication date: 20110914 |