CN-122014162-A - Double-layer partial pressure production method and device for coalbed methane vertical well

CN122014162ACN 122014162 ACN122014162 ACN 122014162ACN-122014162-A

Abstract

The invention relates to the technical field of coal seam collection, in particular to a coal seam gas vertical well double-layer pressure-dividing collecting method and a device thereof, wherein the device main body is internally provided with a self-cleaning mechanism, the self-cleaning mechanism comprises a filter element, a first rotating shaft, a rotating element, a scraping and washing element and a first wind wheel, the filter element is fixedly connected in the device main body, the first rotating shafts are both rotationally connected in the device main body and the filter element, the rotating element is fixedly connected with one end of the first rotating shaft, the scraping and washing piece is fixedly connected to the right end of the rotating piece, the first wind wheel is fixedly connected to the circumferential surface of the first rotating shaft and is arranged in the device main body, the invention realizes the automatic collection of carbon powder by utilizing the air flow in the air inlet pipe to drive the cleaning mechanism, the filter element is effectively prevented from being blocked, and meanwhile, the filtered clean gas is led back and used for driving the second wind power assembly, so that carbon powder collected by the cleaning mechanism is discharged, and the cooperative operation of self-cleaning and recycling is realized.

Inventors

YU DONGFANG
XIN JIE
BIAN HAO
HAO ZHENYU
WANG DAOHUA
YAO HAIPENG
LI LING
YUAN WEI
LIN HAITAO
ZHANG ZHEN
BAI XIAOHU
JIA YUFEI

Assignees

内蒙古煤勘新能源开发有限公司
内蒙古煤炭地质勘查(集团)一一七有限公司

Dates

Publication Date: 20260512
Application Date: 20260324

Claims (8)

1. The utility model provides a double-deck pressure equipment of dividing of coal bed gas vertical well adopts device, includes device main part (1), its characterized in that: Be equipped with self-cleaning mechanism in device main part (1), self-cleaning mechanism includes filter (2), first pivot (3), rotates piece (4), scrapes and washes piece (5) and first wind wheel (6), filter (2) fixed connection in device main part (1), first pivot (3) all rotate and connect in device main part (1) and filter (2), rotate one end of piece (4) fixed connection in first pivot (3), scrape the right-hand member of washing piece (5) fixed connection in rotation piece (4), first wind wheel (6) fixed connection in the circumference surface of first pivot (3), in device main part (1) is located to first wind wheel (6).
2. The double-layer split pressure mining device for the coal bed methane vertical well according to claim 1, wherein two elastic sealing elements (7) are fixedly connected to the inner walls of two sides of the scraping and washing element (5) respectively, the two elastic sealing elements (7) are made of elastic materials, an air outlet (8) is formed in the rotating element (4) in a penetrating mode, and a sewage drain (9) is formed in one end of the scraping and washing element (5) in a penetrating mode.
3. The double-layer split pressure mining device for the coal bed methane vertical well according to claim 2, wherein a fixing piece (10) is fixedly connected in the device main body (1), and a blowing piece (11) is fixedly connected to the lower end of the fixing piece (10).
4. The coalbed methane vertical well double-layer pressure-dividing production device according to claim 3, wherein a second rotating shaft (12) is rotationally connected to the blowing piece (11), a fan (13) is fixedly connected to the circumferential surface of the second rotating shaft (12), and a cavity structure is arranged in the rotating piece (4).
5. The coalbed methane vertical well double-layer pressure-splitting mining device according to claim 4, wherein an induced air pipe (1401) is fixedly connected in the device main body (1), a matching piece (14) is fixedly connected to the lower end of the induced air pipe (1401), a second wind wheel (15) is rotationally connected to the matching piece (14), and a second wind wheel (15) is fixedly connected to the circumferential surface of the second rotating shaft (12).
6. The coalbed methane vertical well double-layer pressure-dividing and sampling device according to claim 5, wherein the front end of the scraping and washing piece (5) is fixedly connected with an extrusion piece (16), the right end of the device main body (1) is fixedly connected with a supporting piece (17), the supporting piece (17) is slidably connected with a retreating piece (18), the right end of the retreating piece (18) is fixedly connected with a first delay switch (19), an installation table (20) is arranged in the supporting piece (17), the left end of the installation table (20) is fixedly connected with a second delay switch (21), a spring (22) is arranged in the supporting piece (17), two retreating pieces (18) and the installation table (20) are respectively fixedly connected to two ends of the spring (22), the left end of the retreating piece (18) is slidably connected with a locking piece (23), the extrusion piece (16) is fixedly connected with a locking piece (23), the right end of the supporting piece (17) is fixedly connected with a valve control piece (24), and the upper end of the supporting piece (17) is fixedly connected with a discharge pipe (25).
7. The coalbed methane vertical well double-layer split pressure production device according to claim 6, wherein the front end of the device main body (1) is fixedly connected with a first external connector (26), and the right end of the device main body (1) is fixedly connected with a second external connector (27).
8. A double-layer split pressure mining method for a coal bed methane vertical well, which uses the double-layer split pressure mining device for the coal bed methane vertical well according to any one of claims 1 to 7, and is characterized by comprising the following steps: S1, after coal bed gas fluid containing coal dust enters a device main body (1) from a first external connector (26), the coal bed gas fluid is primarily filtered through a filter element (2), air flow pushes a first wind wheel (6) to rotate, the first wind wheel (6) drives a first rotating shaft (3) to rotate, and then a rotating element (4) and a scraping and washing element (5) which are fixedly connected with the first wind wheel are driven to synchronously move, and the scraping and washing element (5) scrapes the surface of the filter element (2) in the rotating process, so that the attached carbon dust is scraped into the device main body; S2, in the scraping process, carbon powder opens an elastic sealing piece (7) to enter an inner cavity of a scraping and washing piece (5) through extrusion, the triangular structure of the elastic sealing piece (7) ensures that internal gas cannot leak, when the scraping and washing piece (5) rotates to a dust discharging position, an extrusion piece (16) at the front end of the elastic sealing piece contacts a retreating piece (18) in the supporting piece (17), the retreating piece (18) is pushed to slide inwards and compress a spring (22), a first delay switch (19) and a second delay switch (21) are enabled to be mutually pressed and triggered, a locking piece (23) is controlled to pop out and be embedded into the extrusion piece (16) to realize locking after the first delay switch (19) is triggered, the scraping and washing piece (5) stops swinging, a drain outlet (9) is aligned with the supporting piece (17), meanwhile, a valve control piece (24) is triggered by the second delay switch (21), meanwhile, filtered gas is guided into a matching piece (14) through an induced air pipe (1401), the second wind wheel (15) is pushed to rotate, the second wind wheel (15) drives a second wind wheel (12) and a fan (13) to rotate, and the generated air flow (4) is blown out of the cleaning piece (8) through the drain outlet (25) and the drain outlet (8) to enter the inside the drain pipe (5); S3, after a set delay time, the first delay switch (19) and the second delay switch (21) are automatically reset, the locking piece (23) is retracted to unlock the extrusion piece (16), the spring (22) pushes the retraction piece (18) to reset, the valve control piece (24) closes the valve, the scraping piece (5) resumes rotating to continue cleaning, and a self-cleaning cycle is completed.

Description

Double-layer partial pressure production method and device for coalbed methane vertical well Technical Field The invention relates to the technical field of coal seam mining, in particular to a double-layer partial pressure mining method and device for a coal seam gas vertical well. Background In the prior art, the double-layer partial pressure mining method and the device thereof for the coal bed gas vertical well are high-efficiency development technology which is developed for coal bed gas reservoirs containing multiple coal beds, in particular an upper set of recoverable coal beds and a lower set of recoverable coal beds. The method has the core aims that in a straight well, independent fracturing partial pressure is respectively implemented on an upper coal bed and a lower coal bed, and then gas combined production and combined production are realized through a special underground tubular column structure, so that interlayer interference is effectively avoided, and single well yield is improved. The invention discloses a double-layer split-pressure mining method and a device thereof for a coalbed methane vertical well, and relates to a double-layer split-pressure mining method and a device thereof for the coalbed methane vertical well, wherein a pipeline is arranged in the well, three channels which are isolated from each other are arranged in the pipeline, namely a first channel, a second channel and a third channel, the side walls of the first channel and the second channel are respectively communicated with two coalbeds, so that gas of the two coalbeds is respectively discharged to a wellhead through the first channel and the second channel, liquid of the two coalbeds respectively flows to the bottoms of the first channel and the second channel, and gas-liquid separation is realized in the well; and one-way valves are arranged between the first channel and the second channel and between the second channel and the third channel, so that liquid accumulation is avoided from forming at the bottom of the well, and meanwhile, the liquid of the two coal beds is pumped out of the well together. The invention utilizes a single well to simultaneously extract and pump gas and water produced by an upper coal bed and a lower coal bed respectively, and performs gas-liquid separation at the bottom of the well, thereby realizing a gas-away gas path and a water-away water path, separating pressure systems of two coal beds, reducing interlayer interference in development and effectively improving gas production. The patent utilizes the single well to carry out simultaneously to the gas of upper and lower coal seam output, water is taken together simultaneously, just carried out gas-liquid separation at the shaft bottom, realized gas and walked gas way, water walks the water route, however, in the long-term operation in-process of device, coal bed gas exploitation often accompanies the buggy output, easily causes the check valve to block up, once take place to block up, will destroy liquid-gas separation mechanism, lead to the unable effective separation of gas-liquid, not only weaken the guard action to low pressure coal seam, still can hinder gas up-going channel, reduce and arrange and adopt efficiency, and then influence and arrange and adopt efficiency and probably initiate problems such as pit shaft hydrops. Disclosure of Invention Aiming at the defects existing in the prior art, the invention provides a coal bed gas vertical well double-layer partial pressure mining method and a device thereof, which realize automatic collection of carbon powder by utilizing an air flow driving sweeping mechanism in an air inlet pipe, effectively prevent a filter element from being blocked, and effectively solve the problems that coal bed gas mining is often accompanied with coal dust output, a one-way valve is easy to cause to be blocked, and once the blockage occurs, a liquid-gas separation mechanism is destroyed, so that gas-liquid cannot be effectively separated. In order to achieve the above purpose, the invention is realized by the following technical scheme: The invention provides a coal bed methane vertical well double-layer pressure-dividing and pressure-collecting device which comprises a device main body, wherein a self-cleaning mechanism is arranged in the device main body and comprises a filter element, a first rotating shaft, a rotating element, a scraping and washing element and a first wind wheel, the filter element is fixedly connected in the device main body, the first rotating shaft is both rotationally connected in the device main body and the filter element, the rotating element is fixedly connected with one end of the first rotating shaft, the scraping and washing element is fixedly connected with the right end of the rotating element, the first wind wheel is fixedly connected with the circumferential surface of the first rotating shaft, and the first wind wheel is arranged in the device main body. Further