CN208845159U - A kind of extraction equipment for coal mine bet nitrogen anatonosis - Google Patents
A kind of extraction equipment for coal mine bet nitrogen anatonosis Download PDFInfo
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- CN208845159U CN208845159U CN201820807413.4U CN201820807413U CN208845159U CN 208845159 U CN208845159 U CN 208845159U CN 201820807413 U CN201820807413 U CN 201820807413U CN 208845159 U CN208845159 U CN 208845159U
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Abstract
The utility model discloses a kind of extraction equipments for coal mine bet nitrogen anatonosis, including liquid nitrogen injected system, nitrogen-methane extraction system, nitrogen methane separation system, Nitrogen gas purifying system and the liquefaction of nitrogen circulatory system.Should underground coal mine fluid injection nitrogen permeability-increasing gas pumping system most realize to coal seam carry out liquid nitrogen injection fracturing and the extraction of nitrogen methane, separation, liquefaction of nitrogen injection process, effectively reduce note nitrogen equipment volume, gas pumping method under the note anti-reflection technology of nitrogen is provided, improve extraction concentration rate, and liquid nitrogen loss is effectively reduced, the cost of the note anti-reflection technical measures of nitrogen is reduced, is economized on resources, it reduces from ground to the number of underground transportation liquid nitrogen, saves material resources manpower.
Description
Technical field
The utility model relates to gas drainage technical field, specially a kind of extraction for coal mine bet nitrogen anatonosis is set
It is standby.
Background technique
China is a coal resources big country and consumption of coal big country, with the progress of recovery activity, coal resources
Deep mining has become new normality, and deep is buried coal-bed gas preservation and enriched, while Gas Disaster is also more serious.To have
Effect prevents Gas Disaster, improves gas utilization rate, first takes out and adopts the effective outburst prevention measures of more and more conducts afterwards in coal mine application.
It first takes out in the outburst prevention measures adopted afterwards, measure that coal seam is anti-reflection is to improve the key technology of extraction efficiency.Liquid nitrogen pressure break increases
Saturating technology was starting to obtain the attention of domestic and international shale gas and field of coal mining in recent years.Nitrogen has extremely low in liquid
Temperature (- 196 DEG C) no pollution to the environment, be easy preparation and it is low in cost.During liquid nitrogen is injected coal body, liquid nitrogen gas
Change volume and sharply expands (1m3Liquid nitrogen gasification after 21 DEG C of volumes reach 696m3) generate huge expansive force and develop cracks in coal seam,
Liquid nitrogen is formed to coal gasification high pressure fracturing band.When a large amount of nitrogen enter in coal body microstructure, due to what is adsorbed with raw coal body
The high concentration difference of methanogenesis, drives metathesis to methanogenesis, to increase gas drainage efficiency.The country has gone out at present
Existing some liquid nitrogen injection devices and system for underground coal mine, but liquid nitrogen-gas mixed gas pumping behind the anti-reflection coal seam of liquid nitrogen
Extraction system seldom occurs；The liquid nitrogen that existing underground liquid nitrogen injected system is directed to coal body mostly injects anti-reflection technology and is designed,
Gas-nitrogen mixed gas extraction the link formed after injection liquid nitrogen is not designed.Original technology is due to coal body
Note nitrogen is carried out, gas density in extraction link certainly will be will cause and sharply declined, nitrogen content is higher, gas-nitrogen that extraction goes out
Mixed gas loses original utility value.Original system needs not since the loss amount of nitrogen is big in note nitrogen operation simultaneously
The disconnected a large amount of liquid nitrogen of supplement, cause the excessive occupancy lane space of equipment liquid nitrogen storage tank volume and raw material to transport the problems such as inconvenient, needle
To the above problem, therefore propose a kind of extraction equipment for coal mine bet nitrogen anatonosis.
Utility model content
The purpose of this utility model is to provide a kind of extraction equipments for coal mine bet nitrogen anatonosis, have and reduce
Equipment volume, improves the utilization rate of gas, reduction can liquid nitrogen loss, the advantages of having saved resource and cost, solve existing
The problems such as bulky in technology, at high cost, liquid nitrogen loss is high, and gas extraction concentration is low, wastes resource.
To achieve the above object, the utility model provides the following technical solutions: a kind of for coal mine bet nitrogen anatonosis
Extraction equipment, including liquid nitrogen injected system, nitrogen-methane extraction system, nitrogen methane separation system, Nitrogen gas purifying system and nitrogen
The gas liquefaction circulatory system, the liquid nitrogen injected system by liquid nitrogen storage tank, air compressor, intermediate range note nitrogen pressurization refrigeration baffle-box,
Nitrogen pump truck and note nitrogen pipeline composition are infused, nitrogen-methane extraction system is made of extraction pipeline and extraction pump truck, nitrogen methane separation
System is by nitrogen methane separation device, nitrogen separation vacuum pump and methane separation vacuum pump group at Nitrogen gas purifying system is net by nitrogen
Change device to constitute, the liquefaction of nitrogen circulatory system is by one stage of compression pump, level-one refrigeration pump, two stage compression pump, second level refrigeration pump, expander
With the thermally conductive floor composition of ultralow temperature；The liquid nitrogen storage tank, intermediate range note nitrogen are pressurized refrigeration baffle-box and note nitrogen the pipeline successively company of sealing
It connects, intermediate range infuses nitrogen pressurization refrigeration baffle-box and the output end of air compressor is tightly connected, and infuses nitrogen pipeline and infuses the defeated of nitrogen pump truck
Outlet is tightly connected；The front end coal seam Jun You of note the nitrogen pipeline and extraction pipeline, infuses in the coal seam of nitrogen pipeline front end and is provided with note nitrogen
Hole, the input terminal in note nitrogen hole are equipped with note nitrogen hole hole packer, and the front end and note nitrogen hole hole packer for infusing nitrogen pipeline are fastened and connected；Institute
The output end for stating nitrogen purge successively connects one stage of compression pump, level-one refrigeration pump, two stage compression pump, second level refrigeration pump and expander
It is connect with the thermally conductive floor of ultralow temperature, the input terminal of the thermally conductive floor of ultralow temperature and liquid nitrogen storage tank is tightly connected；The nitrogen purge
Input terminate nitrogen-methane separation device output end, nitrogen methane separation device right chamber body output termination nitrogen separation vacuum
Pump, the left chamber body output termination methane separation vacuum pump of nitrogen methane separation device, the output of methane separation vacuum pump are terminated with first
Alkane collection tank；The extraction pipeline output end connects nitrogen methane separation device, is provided with drainage holes in the coal seam of extraction pipeline front end,
The outlet end of drainage holes is equipped with extraction borehole hole packer, and front end and the extraction borehole hole packer of extraction pipeline are fastened and connected,
Extraction pipeline and extraction pump truck are tightly connected.
Preferably, the preferential permeable membrane of methane is installed in the nitrogen methane separation device.
Preferably, the connecting pin of the liquid nitrogen storage tank and the thermally conductive floor of ultralow temperature, liquid nitrogen storage tank and intermediate range are infused
The connecting pin of nitrogen pressurization refrigeration baffle-box, intermediate range note nitrogen are pressurized refrigeration baffle-box and infuse the connecting pin of nitrogen pipeline, nitrogen
The connecting pin of gas purifier and nitrogen methane separation device, the connecting pin of nitrogen methane separation device and methane collection cabinet and nitrogen
The connecting pin of methane separation device and extraction pipeline is connected to low temperature resistant valve.
Preferably, the air compressor, intermediate range note nitrogen pressurization refrigeration baffle-box, nitrogen separation vacuum pump and methane separation
Pressure gauge is mounted on vacuum pump.
Compared with prior art, the beneficial effects of the utility model are as follows:
Should the extraction equipment of underground coal mine fluid injection nitrogen anatonosis most realize liquid nitrogen injection fracturing and nitrogen carried out to coal seam
The process of methane extraction, separation, liquefaction of nitrogen injection effectively reduces note nitrogen equipment volume, provides watt under the note anti-reflection technology of nitrogen
This pumping method improves gas extraction concentration, and effectively reduces liquid nitrogen loss, reduces the cost of the note anti-reflection technical measures of nitrogen, section
About resource reduces from ground to the number of underground transportation liquid nitrogen, saves material resources manpower.
Detailed description of the invention
Fig. 1 is the system diagram of the utility model.
In figure: 1 liquid nitrogen storage tank, 2 air compressors, 3 intermediate ranges note nitrogen pressurization refrigeration baffle-box, 4 note nitrogen pump trucks, 7 note nitrogen pipes
Road, 8 coal seams, 6 note nitrogen holes, 5 note nitrogen hole hole packers, 9 drainage holes, 10 extraction borehole hole packers, 11 extraction pipelines, 12 extraction pumps
Vehicle, 13 nitrogen methane separation devices, 14 nitrogen separation vacuum pumps, 15 methane separation vacuum pumps, 16 nitrogen purges, 17 one stage of compression
Pump, 18 level-one refrigeration pumps, 19 two stage compression pumps, 20 second level refrigeration pumps, 21 expanders, the thermally conductive floor of 22 ultralow temperature, 23 methane are received
Collect cabinet, the preferential permeable membrane of 24 methane, 25 low temperature resistant valves, 26 pressure gauges.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
Referring to Fig. 1, a kind of extraction equipment for coal mine bet nitrogen anatonosis, including liquid nitrogen injected system, nitrogen-first
Alkane extraction system, nitrogen methane separation system, Nitrogen gas purifying system and the liquefaction of nitrogen circulatory system, liquid nitrogen injected system is by liquid nitrogen
Storage tank 1, air compressor 2, intermediate range note nitrogen pressurization refrigeration baffle-box 3, note nitrogen pump truck 4 and note nitrogen pipeline 7 form, nitrogen-methane
Extraction system is made of extraction pipeline 11 and extraction pump truck 17, and nitrogen methane separation system is by nitrogen methane separation device 13, nitrogen
Separate vacuum pump 14 and methane separation vacuum pump 15 form, and are equipped with the preferential permeable membrane 24 of methane in nitrogen methane separation device 13,
Nitrogen gas purifying system is made of nitrogen purge 16, and the liquefaction of nitrogen circulatory system pumps 12, level-one refrigeration pump 18, two by one stage of compression
Grade compression pump 19, second level refrigeration pump 20, expander 21 and the thermally conductive floor 22 of ultralow temperature form；Liquid nitrogen storage tank 1, intermediate range note nitrogen increase
Compacting cold buffer case 3 and note nitrogen pipeline 7 are successively tightly connected, and intermediate range note nitrogen pressurization refrigeration baffle-box 3 is defeated with air compressor 2
Outlet is tightly connected, and note nitrogen pipeline 7 and the output end for infusing nitrogen pump truck 4 are tightly connected；Before infusing nitrogen pipeline 7 and extraction pipeline 11
There is coal seam 8 at end, infuses and is provided with note nitrogen hole 6 in 7 front end coal seam of nitrogen pipeline, and the input terminal in note nitrogen hole 6 is equipped with note nitrogen hole hole packer 5,
The front end and note nitrogen hole hole packer 5 for infusing nitrogen pipeline 7 are fastened and connected；The input terminal of nitrogen purge 16 successively connects level-one pressure
Contracting pump 12, level-one refrigeration pump 18, two stage compression pump 19, second level refrigeration pump 20 and expander 21 and the thermally conductive floor 22 of ultralow temperature connect
It connects, the thermally conductive floor 22 of ultralow temperature and the input terminal of liquid nitrogen storage tank 1 are tightly connected；The input of nitrogen purge 16 terminates nitrogen-first
The output end of alkane separator 13, the right chamber body output termination nitrogen separation vacuum pump 14 of nitrogen methane separation device 13, nitrogen-methane
The left chamber body output termination methane separation vacuum pump 15 of separator 13, the output of methane separation vacuum pump 15 are terminated with methane collection
Cabinet 23；The output of extraction pipeline 11 terminates nitrogen methane separation device 13, is provided with drainage holes in the coal seam 8 of 11 front end of extraction pipeline
9, the outlet end of drainage holes 9 is equipped with extraction borehole hole packer 10, and the front end of extraction pipeline 11 and extraction borehole hole packer 10 fasten
It is tightly connected, extraction pipeline 11 and extraction pump truck 17 are tightly connected；Nitrogen methane separation device 13 connects methane separation vacuum pump 15,
The output of methane separation vacuum pump 15 is terminated with methane collection cabinet 23, the connection of liquid nitrogen storage tank 1 and the thermally conductive floor 22 of ultralow temperature
End, the connecting pin of liquid nitrogen storage tank 1 and intermediate range note nitrogen pressurization refrigeration baffle-box 3, intermediate range note nitrogen pressurization are made
The connecting pin of cold buffer case 3 and the note connecting pin of nitrogen pipeline 7, nitrogen purge 16 and nitrogen methane separation device 13,
Nitrogen methane separation device 13 and the connecting pin of methane collection cabinet 23 and the company of nitrogen methane separation device 13 and extraction pipeline 11
It connects end and is connected to low temperature resistant valve 25；Air compressor 2, intermediate range note nitrogen pressurization refrigeration baffle-box 3,14 and of nitrogen separation vacuum pump
Pressure gauge 26 is mounted on methane separation vacuum pump 15.
The extraction equipment of the underground coal mine fluid injection nitrogen anatonosis at work, sent out by liquid nitrogen storage tank 1 by liquid nitrogen, infuses nitrogen reaching
Refrigeration baffle-box 3 is pressurized to liquid nitrogen in transit since the part of heat absorption and the pressure loss carries out by intermediate range note nitrogen before pump truck 4
Moderate pressure supplement drops, so that liquid nitrogen keeps high pressure low temperature state before entering note nitrogen pump truck 4.Note nitrogen pump truck 4 bores coal seam 8 afterwards
Note nitrogen hole 6 simultaneously pressurizes to liquid nitrogen, carries out note nitrogen operation to coal seam 8 by note nitrogen pipeline 7, and to aperture note nitrogen hole envelope
Hole device 5 carries out sealing of hole operation.Extraction link bores drainage holes 9 to coal seam 8 by extraction pump truck 17, bores in time in aperture arrangement extraction
Hole hole packer 10, nitrogen-methane mixed gas that extraction goes out are transported by extraction pipeline 11 to nitrogen methane separation device 13, nitrogen
The preferential permeable membrane 24 of methane is arranged in gas methane separation device 13, and 13 cavity of nitrogen methane separation device is divided into two parts, by
13 right chamber body of nitrogen methane separation device is manufactured subnormal ambient by nitrogen separation vacuum pump 14, by methane separation vacuum pump 15 by nitrogen
13 left chamber body of methane separation device manufactures subnormal ambient, by control low temperature resistant 25 opening degree of valve, nitrogen separation vacuum pump 14 and
The power regulation of methane separation vacuum pump 15 makes the left chamber body negative pressure of nitrogen methane separation device 13 be greater than right chamber body, makes methane can
Fully through the preferential permeable membrane 24 of methane；Gas after nitrogen methane separation device 13 is that nitrogen gas adulterates minimal amount of first
Alkane gas, these gases form not methane-containing gas after the filtering by the nitrogen purge 16 being mainly made of methane adsorbent
Nitrogen gas.Enter one stage of compression pump 12 after nitrogen gas and level-one refrigerator 13 carries out pressurization cooling for the first time, it is rear to enter
Two stage compression pump 14 and second level refrigeration pump 20 carry out second of pressurization cooling.Nitrogen temperature is big after the cooling down operation that pressurizes twice
Width decline, pressure substantially increase, and with rear portion high pressure low temperature nitrogen by the rapid swelling heat absorption of expander 21, lead to ultralow temperature
Hot floor 22 carries out cooling and reaches -196 DEG C hereinafter, another part nitrogen enters the thermally conductive progress of floor 22 third of ultralow temperature
The cooling down of step becomes liquid nitrogen and sends back in liquid nitrogen storage tank 1, and the nitrogen by expansion, which is sent back at one stage of compression pump 12, to be continued
Above-mentioned circulation.
In summary: the extraction equipment of this underground coal mine fluid injection nitrogen anatonosis, which is most realized, carries out liquid nitrogen injection cause to coal seam 18
Split and the extraction of nitrogen methane, separation, liquefaction of nitrogen circulation process, effectively reduce note nitrogen equipment volume, provide note the anti-reflection skill of nitrogen
Gas pumping method under art improves gas extraction concentration, and effectively reduces liquid nitrogen loss, reduces the note anti-reflection technical measures of nitrogen
Cost economizes on resources, and reduces from ground to the number of underground transportation liquid nitrogen, saves material resources manpower.
While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art,
It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired
Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.
Claims (4)
1. a kind of extraction equipment for coal mine bet nitrogen anatonosis, including liquid nitrogen injected system, nitrogen-methane extraction system,
Nitrogen methane separation system, Nitrogen gas purifying system and the liquefaction of nitrogen circulatory system, it is characterised in that: the liquid nitrogen injected system by
Liquid nitrogen storage tank (1), air compressor (2), intermediate range note nitrogen pressurization refrigeration baffle-box (3), note nitrogen pump truck (4) and note nitrogen pipeline (7)
Composition, nitrogen-methane extraction system are made of extraction pipeline (11) and extraction pump truck (17), and nitrogen methane separation system is by nitrogen
Methane separation device (13), nitrogen separation vacuum pump (14) and methane separation vacuum pump (15) composition, Nitrogen gas purifying system is by nitrogen
Clarifier (16) is constituted, and the liquefaction of nitrogen circulatory system pumps (12), level-one refrigeration pump (18), two stage compression pump by one stage of compression
(19), second level refrigeration pump (20), expander (21) and the thermally conductive floor of ultralow temperature (22) composition；The liquid nitrogen storage tank (1), intermediate range note
Nitrogen pressurization refrigeration baffle-box (3) and note nitrogen pipeline (7) are successively tightly connected, and intermediate range infuses nitrogen pressurization refrigeration baffle-box (3) and air
The output end of compressor (2) is tightly connected, and note nitrogen pipeline (7) and the output end for infusing nitrogen pump truck (4) are tightly connected；The note nitrogen pipe
The front end coal seam Jun You (8) on road (7) and extraction pipeline (11) infuses and is provided with note nitrogen hole (6) in nitrogen pipeline (7) front end coal seam, infuses nitrogen
The input terminal in hole (6) is equipped with note nitrogen hole hole packer (5), and the front end and note nitrogen hole hole packer (5) fit sealing for infusing nitrogen pipeline (7) connect
It connects；The output end of the nitrogen purge (16) successively connects one stage of compression pump (12), level-one refrigeration pump (18), two stage compression pump
(19), second level refrigeration pump (20) and expander (21) are connect with the thermally conductive floor of ultralow temperature (22), the thermally conductive floor of ultralow temperature (22) with
The input terminal of liquid nitrogen storage tank (1) is tightly connected；Input termination nitrogen-methane separation device (13) of the nitrogen purge (16)
Output end, right chamber body output termination nitrogen separation vacuum pump (14) of nitrogen methane separation device (13), nitrogen methane separation device
(13) left chamber body output termination methane separation vacuum pump (15), the output of methane separation vacuum pump (15) are terminated with methane collection
Cabinet (23)；Extraction pipeline (11) output termination nitrogen methane separation device (13), the coal seam (8) of extraction pipeline (11) front end
Inside be provided with drainage holes (9), the outlet ends of drainage holes (9) is equipped with extraction borehole hole packer (10), the front end of extraction pipeline (11) with
Extraction borehole hole packer (10) is fastened and connected, and extraction pipeline (11) and extraction pump truck (17) are tightly connected.
2. a kind of extraction equipment for coal mine bet nitrogen anatonosis according to claim 1, it is characterised in that: the nitrogen
The preferential permeable membrane of methane (24) is installed in gas methane separation device (13).
3. a kind of extraction equipment for coal mine bet nitrogen anatonosis according to claim 1, it is characterised in that: the liquid
The connecting pin of nitrogen storage tank (1) and the thermally conductive floor of ultralow temperature (22), liquid nitrogen storage tank (1) and intermediate range note nitrogen pressurization refrigeration baffle-box (3)
Connecting pin, intermediate range note nitrogen pressurization refrigeration baffle-box (3) and infuse nitrogen pipeline (7) connecting pin, nitrogen purge (16) and nitrogen
The connecting pin of methane separation device (13), the connecting pin of nitrogen methane separation device (13) and methane collection cabinet (23) and nitrogen first
The connecting pin of alkane separator (13) and extraction pipeline (11) is connected to low temperature resistant valve (25).
4. a kind of extraction equipment for coal mine bet nitrogen anatonosis according to claim 1, it is characterised in that: the sky
Air compressor (2), intermediate range note nitrogen pressurization refrigeration baffle-box (3), nitrogen separation vacuum pump (14) and methane separation vacuum pump (15)
On be mounted on pressure gauge (26).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820807413.4U CN208845159U (en) | 2018-05-29 | 2018-05-29 | A kind of extraction equipment for coal mine bet nitrogen anatonosis |
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| CN201820807413.4U CN208845159U (en) | 2018-05-29 | 2018-05-29 | A kind of extraction equipment for coal mine bet nitrogen anatonosis |
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| CN208845159U true CN208845159U (en) | 2019-05-10 |
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| CN201820807413.4U Active CN208845159U (en) | 2018-05-29 | 2018-05-29 | A kind of extraction equipment for coal mine bet nitrogen anatonosis |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108756836A (en) * | 2018-05-29 | 2018-11-06 | 西安科技大学 | A kind of underground coal mine fluid injection nitrogen permeability-increasing gas pumping system |
| CN111894540A (en) * | 2020-06-23 | 2020-11-06 | 中国矿业大学 | Up-hole drilling negative pressure forward type low-temperature fluid injection staged circulating fracturing method |
-
2018
- 2018-05-29 CN CN201820807413.4U patent/CN208845159U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108756836A (en) * | 2018-05-29 | 2018-11-06 | 西安科技大学 | A kind of underground coal mine fluid injection nitrogen permeability-increasing gas pumping system |
| CN108756836B (en) * | 2018-05-29 | 2024-01-26 | 西安科技大学 | Coal mine underground liquid nitrogen injection anti-reflection gas extraction system |
| CN111894540A (en) * | 2020-06-23 | 2020-11-06 | 中国矿业大学 | Up-hole drilling negative pressure forward type low-temperature fluid injection staged circulating fracturing method |
| CN111894540B (en) * | 2020-06-23 | 2021-08-06 | 中国矿业大学 | Up-hole drilling negative pressure forward type low-temperature fluid injection staged circulating fracturing method |
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Effective date of registration: 20220815 Address after: 710054 No. 58, middle section, Yanta Road, Shaanxi, Xi'an Patentee after: XI'AN University OF SCIENCE AND TECHNOLOGY Patentee after: Shaanxi Huangling No.2 Coal Mine Co.,Ltd. Address before: 710054 No. 58, Yanta Road, Shaanxi, Xi'an Patentee before: XI'AN University OF SCIENCE AND TECHNOLOGY |