CN105201546B - Device and method for improving gas extraction concentration - Google Patents
Device and method for improving gas extraction concentration Download PDFInfo
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- CN105201546B CN105201546B CN201510601895.9A CN201510601895A CN105201546B CN 105201546 B CN105201546 B CN 105201546B CN 201510601895 A CN201510601895 A CN 201510601895A CN 105201546 B CN105201546 B CN 105201546B
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- gas
- extraction
- gas pumping
- pumping pipe
- concentration sensor
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
Abstract
The invention relates to a device and a method for improving gas extraction concentration. The device comprises a gas extraction pipe, a metallic net cage, activated carbon blocks, a gas concentration sensor, an electromagnetic valve and the like, wherein the activated carbon blocks fill up the metallic net cage; the metallic net cage is contained in the gas extraction pipe and is lowered into an extraction borehole together with the extraction pipe; the gas concentration sensor is tied on the outer wall of the extraction pipe in the borehole; the external portion of the borehole is connected with the electromagnetic valve, and a control console on the electromagnetic valve can automatically control the opening and closing of the electromagnetic valve by reading gas concentration change on the gas concentration sensor. By using the huge adsorption difference of the activated carbon to methane molecules under a variable-pressure effect, gas which is stored in advance is desorbed intensively by the activated carbon when the valve is opened, the extraction concentration of borehole gas is effectively improved and the problems of slow gas desorption speed and low extraction concentration during traditional gas extraction are solved.
Description
Technical field
The present invention relates to a kind of device and method for improving gas extraction concentration, belongs to drilling gas extraction field.
Background technology
With a large amount of gas produced in progress of coal mining for the safety in production in colliery constitutes great threat.Coal
With the disaster such as Gas Outburst, gas explosion once occurring cause great casualties and huge economic loss.Always
Since, the gas amount that technology personnel are produced during exploitation reducig is devoted to by various means, wherein, most
A kind of conventional method is exactly to set up gas drainage system, by extraction borehole pre-mining drainage coal-bed gas of constructing.However, for
Most of gas permeability of coal seam is poor, ature of coal is soft, the mine that crustal stress is big, gas drainage system extraction early stage often effect compared with
It is good, but it is subject to the mining influences such as tunnel initating, the advance of the face to cause stress to the extraction borehole during extraction later stage due to down-hole
Concentrate, this supports drilling to maintain the hard of its basic configuration for itself anti-pressure ability and drilling self-stable ability is still leaned at present
Contraction distortion, the local collapse hole for accelerating extraction borehole is more easily caused for the PVC gas pumping pipes of thin-walled hollow, gas pumping is made
Pipe deformation, blocking, or even be just fully densified within a short period of time, drilling is scrapped completely, it is difficult to for Gas Flow and extraction
Express passway is provided, the gas density that extraction goes out is extremely low, and the gas of extraction is mostly air, thus, taking out for a long time again
Adopt is also that futile effort is had no result.Particularly, the gas density that extraction goes out once runs into naked light at 5% -16%, and gas will to occur quick-fried
It is fried, do not simply fail to as the utilization of resources, and can seriously threaten to methane gas extraction pipeline seat belt.All the time, concentration mistake
Low gas pumping does not out reach afterwards the standard of industrial utilization, is forced to enter in air, not only increases greenhouse effect, and
It is also a kind of great wasting of resources.
At present, the method major part for improving gas extraction concentration is that the angle for reducing gas leakage is to improve sealing quality
Send out point.Although existing hole sealing technology species is various, directly blocked or hole packer using organic material, inorganic material nothing more than
The methods such as closure carry out sealing of hole, and none can accomplish absolute air tight, the undesirable gas density for going out extraction of sealing of hole effect
It is not high.Some mines obtain higher gas extraction concentration by closing indivedual extraction boreholes, but due to being accurately positioned,
Sometimes usually a drilling gas leakage and have to close large stretch of extraction borehole, greatly have impact on normal gas pumping work
Make, not only inefficiency, but also hide some dangers for for safety in production.
Therefore, a kind of method that can improve gas extraction concentration is createed, the high concentration extraction for realizing gas not only may be used
Think that safety in production provides safeguard, improve extraction efficiency, and reduce the pollution to air, realize gas as a kind of clear
The industrial utilization of the clean energy.
The content of the invention
The present invention is in order to solve weak point of the prior art, there is provided a kind of extraction efficiency high, safe and reliable, wiper ring
The device of the raising gas extraction concentration of guarantor.
To solve above-mentioned technical problem, the present invention is adopted the following technical scheme that：A kind of device for improving gas extraction concentration,
Including control station, operating board and gas pumping pipe, part of the gas pumping pipe in drilling offers sieve aperture on tube wall, control
Platform and operating board are each provided on the gas pumping pipe outside drilling, are provided with some along its length inside the gas pumping pipe in drilling
Individual metal cylinder mould, metal cylinder mould inside is filled with activated carbon block, and gas pumping pipe outer wall side is provided with gas concentration sensor, watt
This concentration sensor is connected with data signal line, and the sieve aperture on data signal line Jing drainage tubes is controlled into gas pumping Guan Houyu
Controlling switch connection on platform, operating board is provided with for the electromagnetic valve of folding gas pumping pipe, and controlling switch is by controlling letter
Number line is connected with electromagnetic valve.
Metal cylinder mould is in column structure, and the diameter of metal cylinder mould is slightly less than the internal diameter of gas pumping pipe, the length of metal cylinder mould
Degree is equal with the single long length of gas pumping pipe, and the mesh diameter of metal cylinder mould is 0.5-1cm, metal cylinder mould and gas pumping
There is the gap of 3-5mm between inside pipe wall.
Mesh size of the size dimension of activated carbon block more than metal cylinder mould.
A kind of method for improving gas extraction concentration, comprises the steps：
（1）Comprehensive drillable length and coal seam physical property design following parameter：Gas pumping length of tube, sealing of hole segment length, watt
Position of this concentration sensor on gas pumping pipe；
（2）After gas concentration sensor is connected with data signal line, gas concentration sensor is strapped in gas with adhesive tape
On extraction pipe outer wall relevant position, the wire netting cage mounted that will be equipped with activated carbon block enters in gas pumping pipe, by under gas pumping pipe
Enter in sieve aperture；
（3）The sealing of hole sections of one section of long 5-8m are blocked in drilling orifice using " a two stifled notes " method of pore sealing；
（4）The data signal line of gas concentration sensor is connected with controlling switch, the controlling switch other end is by control
Holding wire is connected with electromagnetic valve, and control station can realize electromagnetic valve by reading the variation ofgas density on gas concentration sensor
Automatic open-close；
（5）Opening is connected to the gas pumping pump on gas pumping pipe, carries out negative pressure mash gas extraction operation.
（6）When gas density is less than 16% in extraction borehole, gas concentration sensor controls signal output to control station
Platform processed exports the closed electromagnetic valve on electromagnetic signal control operation platform, and now the activated carbon block in metal cylinder mould starts absorption in a large number
The gas that coal seam parses；When gas density is more than 30% in extraction borehole, gas concentration sensor is by signal output to control
Platform processed, the electromagnetic valve on control station output electromagnetic signal control operation platform is opened, and proceeds negative pressure extraction, now activated carbon block
Start to parse gas, the gas that gas pumping pump parses activated carbon block is extracted out；
（7）Repeat step（6）, the gas density in extraction borehole continues after 24-48h, to arrive after testing less than 16%
Gas pressure in coal seam, less than after 8m/t, closes extraction pump less than 0.74MPa and relative gas bearing capacity outburst amount, completes to take out
Adopt operation.
Gas concentration sensor gas pumping pipe outer wall set location apart from 15-20m of drilling orifice.
Step（3）In " two stifled a note " method of pore sealing particular content be：Uniform application is a certain amount of on first paragraph cotton strap
Mix homogeneously polyurethane A, B material, first paragraph cotton strap is wrapped in rapidly the inner of drainage tube and sealing of hole sections, gas is taken out
Adopt pipe quickly to fill in drilling, the second segment cotton then expected with polyurethane A, B of a certain amount of mix homogeneously of same uniform application
Grouting Pipe is quickly filled in drilling by cloth together with gas pumping pipe circumvolution, after second segment cotton strap expansion consolidation, is used
Grouting pump injects cement mortar into closing space by reserved Grouting Pipe, and sealing of hole sections are formed after slurry consolidation.
Above-mentioned technical proposal is adopted, the invention has the advantages that：
1. when gas density is relatively low in drilling, electromagnetic valve is closed, stops extraction, gas pressure gradually rises in drilling,
Now activated carbon block adsorbs substantial amounts of methane molecule, when absorption reaches saturation, when gas density gradually rises in gas pumping pipe,
Electromagnetic valve is opened, starts gas pumping, gas pressure is more and more lower in gas pumping pipe, now activated carbon block starts before parsing
The gas of absorption, by the use of the activated carbon block superpower to methane adsorption ability as " the interim storage room " of gas pumping, will be previous
The gas of absorption concentrates parsing, and by the pressure change during negative pressure extraction gas of high concentration is directly obtained, and reduces conventional work
Ground Purification when industry is utilized, improves work efficiency, improves the economic benefit of enterprise.
2. electromagnetic valve automatically controls the start-stop of extraction according to variation ofgas density in drilling, it is to avoid a conventional drilling is leaked
Gas and have to close the blindness of large stretch of extraction borehole, the present invention can accomplish to be accurately positioned and be automatically switched off low concentration gas
The extraction of drilling, drastically increases work efficiency.
3. gap is left between the activated carbon block and tube wall in gas pumping pipe, it is allowed to which gas pumping pipe occurs during sieve aperture collapse hole
The deformation of little yardstick, now the elasticity of accumulation can effectively be discharged in gas pumping pipe surrounding medium, gas after deformation
After extraction tube wall is contacted with activated carbon block, activated carbon block can be effective as the inner support point of hollow thin-wall gas pumping pipe
The radial crushing strength of gas pumping pipe is improved, prevents gas pumping pipe from continuing to deform, the support pattern of this " actively allow pressure "
Drastically increase the ability that gas pumping pipe resists collapse hole.
Description of the drawings
Fig. 1 is the structural representation of the device for improving gas extraction concentration；
Fig. 2 is A-A profiles in Fig. 1.
Specific embodiment
A kind of device of the raising gas extraction concentration by shown in Fig. 1 and Fig. 2, including control station 1, operating board 2 and gas
Drainage tube 3, part of the gas pumping pipe 3 in drilling offers sieve aperture 6 on tube wall, and control station 1 and operating board 2 are each provided at boring
On gas pumping pipe 3 outside hole 11, several metal cylinder moulds 4 are provided with along its length inside the gas pumping pipe 3 in drilling 11,
The inside of metal cylinder mould 4 is filled with activated carbon block 5, and the outer wall side of gas pumping pipe 3 is provided with gas concentration sensor 7, and gas is dense
Degree sensor 7 is connected with data signal line 8, data signal line 8 Jing after sieve aperture 6 enters gas pumping pipe 3 with control station 1 on control
System switch 9 connects, and operating board 2 is provided with for the electromagnetic valve 10 of folding gas pumping pipe 3, and controlling switch 9 passes through control signal
Line is connected with electromagnetic valve 10.
Metal cylinder mould 4 is in column structure, and the diameter of metal cylinder mould 4 is slightly less than the internal diameter of gas pumping pipe 3, metal cylinder mould 4
Length it is equal with the single long length of gas pumping pipe 3, the mesh diameter of metal cylinder mould 4 is 0.5-1cm, metal cylinder mould 4 with watt
There is the gap of 3-5mm between this inwall of drainage tube 3.
The size dimension of activated carbon block 5 have to be larger than mesh diameter at metal cylinder mould 4, thus be avoided that activated carbon block 5 from gold
The mesh of category cylinder mould 4 is out.
A kind of method for improving gas extraction concentration, comprises the steps：
（1）The parameter such as comprehensive drillable length and coal seam physical property（Along coal bed gas extraction 11 depth 88m, aperture 94mm of drilling；Coal
Layer ature of coal is soft, and crustal stress is big, the easy collapse hole of extraction borehole 11.）Design following parameter：Need gas pumping pipe 3 totally 40, gas
Length 2m of drainage tube 3, the external diameter 50mm of gas pumping pipe 3, internal diameter 42mm, position of the gas concentration sensor 7 on gas pumping pipe 3
Put away from hell 18m；
（2）After gas concentration sensor 7 is connected with data signal line 8, gas concentration sensor 7 is strapped in watt with adhesive tape
On this outer wall relevant position of drainage tube 3, the metal cylinder mould 4 that will be equipped with activated carbon block 5 is put in gas pumping pipe 3, metal cylinder mould 4
There are 3-5mm gaps between the inwall of gas pumping pipe 3, will enter under gas pumping pipe 3 in sieve aperture 6；
（3）The sealing of hole sections 12 of one section of long 5-8m are blocked using " a two stifled notes " method of pore sealing；
（4）The data signal line 8 of gas concentration sensor 7 is connected with controlling switch 9, the other end of controlling switch 9 passes through
Control signal wire is connected with electromagnetic valve 10, and control station 1 can be real by the variation ofgas density read on gas concentration sensor 7
The automatic open-close of existing electromagnetic valve 10；
（5）Opening is connected to the gas pumping pump on gas pumping pipe 3, carries out negative pressure mash gas extraction operation.
（6）When gas density is less than 16% in extraction borehole 11, gas concentration sensor 7 is by signal output to control station
1, the electromagnetic valve 10 on the output electromagnetic signal control operation of control station 1 platform 2 is closed, and now the activated carbon block 5 in metal cylinder mould 4 is opened
Begin to adsorb the gas that a large amount of coal seams parse；When gas density is more than 30% in extraction borehole 11, gas concentration sensor 7
Signal output to control station 1, the electromagnetic valve 10 on the output electromagnetic signal control operation of control station 1 platform 2 are opened, proceed to bear
Extraction is pressed, now activated carbon block 5 starts to parse gas, and the gas that gas pumping pump parses activated carbon block 5 is extracted out；
（7）Repeat step（6）, the gas density in extraction borehole continues after 24-48h, to arrive after testing less than 16%
Gas pressure in coal seam, less than after 8m/t, closes extraction pump less than 0.74MPa and relative gas bearing capacity outburst amount, completes to take out
Adopt operation.
Gas concentration sensor 7 the outer wall of gas pumping pipe 3 set location apart from 15-20m of drilling orifice.
Step（3）In " two stifled a note " method of pore sealing particular content be：Uniform application is a certain amount of on first paragraph cotton strap
Mix homogeneously polyurethane A, B material, first paragraph cotton strap is wrapped in rapidly the inner of drainage tube and sealing of hole sections, gas is taken out
Adopt pipe 3 quickly to fill in drilling, the second segment cotton then expected with polyurethane A, B of a certain amount of mix homogeneously of same uniform application
Grouting Pipe is quickly filled in drilling by cloth together with the circumvolution of gas pumping pipe 3, after second segment cotton strap expansion consolidation, is used
Grouting pump injects cement mortar into closing space by reserved Grouting Pipe, and sealing of hole sections are formed after slurry consolidation.
The present embodiment not makees any pro forma restriction to shape, material, structure of the invention etc., every according to this
Any simple modification, equivalent variations and modification that bright technical spirit is made to above example, belong to the technology of the present invention side
The protection domain of case.
Claims (6)
1. it is a kind of improve gas extraction concentration device, it is characterised in that：Including control station, operating board and gas pumping pipe, watt
Part of this drainage tube in drilling offers sieve aperture on tube wall, and control station and operating board are each provided at the gas pumping outside drilling
Guan Shang, is provided with along its length several metal cylinder moulds inside the gas pumping pipe in drilling, metal cylinder mould inside is filled with work
Property carbon block, gas pumping pipe outer wall side is provided with gas concentration sensor, and gas concentration sensor is connected with data signal line, number
The controlling switch connection entered on gas pumping Guan Houyu control stations according to the sieve aperture on holding wire Jing drainage tubes, operating board is provided with
For the electromagnetic valve of folding gas pumping pipe, controlling switch is connected by control signal wire with electromagnetic valve.
2. it is according to claim 1 it is a kind of improve gas extraction concentration device, it is characterised in that：Metal cylinder mould is in cylinder
Structure, the diameter of metal cylinder mould is slightly less than the internal diameter of gas pumping pipe, and the length of metal cylinder mould is long with the single hop of gas pumping pipe
Degree is equal, and the mesh diameter of metal cylinder mould is 0.5-1cm, there is the gap of 3-5mm between metal cylinder mould and gas pumping inside pipe wall.
3. it is according to claim 2 it is a kind of improve drilling gas extraction concentration device, it is characterised in that：Activated carbon block
Mesh size of the size dimension more than metal cylinder mould.
4. a kind of method that usage right requires the raising gas extraction concentration of the device described in 3, it is characterised in that：Including as follows
Step：
（1）Comprehensive drillable length and coal seam physical property design following parameter：Gas pumping length of tube, sealing of hole segment length, gas are dense
Position of the degree sensor on gas pumping pipe；
（2）After gas concentration sensor is connected with data signal line, gas concentration sensor is strapped in gas pumping with adhesive tape
On pipe outer wall relevant position, the wire netting cage mounted that will be equipped with activated carbon block enters in gas pumping pipe, sieve will be entered under gas pumping pipe
In hole；
（3）The sealing of hole sections of one section of long 5-8m are blocked in drilling orifice using " a two stifled notes " method of pore sealing；
（4）The data signal line of gas concentration sensor is connected with controlling switch, the controlling switch other end passes through control signal
Line is connected with electromagnetic valve, and control station can realize oneself of electromagnetic valve by the variation ofgas density on reading gas concentration sensor
Dynamic folding；
（5）Opening is connected to the gas pumping pump on gas pumping pipe, carries out negative pressure mash gas extraction operation；
（6）When gas density is less than 16% in extraction borehole, gas concentration sensor is by signal output to control station, control station
The closed electromagnetic valve on electromagnetic signal control operation platform is exported, now the activated carbon block in metal cylinder mould starts to adsorb a large amount of coal seams
The gas for parsing；When gas density is more than 30% in extraction borehole, gas concentration sensor is by signal output to control
Platform, the electromagnetic valve on control station output electromagnetic signal control operation platform is opened, and proceeds negative pressure extraction, and now activated carbon block is opened
Begin parsing gas, and the gas that gas pumping pump parses activated carbon block is extracted out；
（7）Repeat step（6）, the gas density in extraction borehole continues after 24-48h less than 16%, after testing to coal seam
Interior gas pressure, less than after 8m/t, closes extraction pump less than 0.74MPa and relative gas bearing capacity outburst amount, completes extraction work
Industry.
5. it is according to claim 4 it is a kind of improve gas extraction concentration method, it is characterised in that：Gas concentration sensor
Gas pumping pipe outer wall set location apart from 15-20m of drilling orifice.
6. the method for a kind of raising gas extraction concentration according to claim 4 or 5, it is characterised in that：Step（3）In
" two stifled a note " method of pore sealing particular content is：On first paragraph cotton strap the polyurethane A of a certain amount of mix homogeneously of uniform application,
B material, first paragraph cotton strap the inner of drainage tube and sealing of hole sections is wrapped in rapidly, and gas pumping pipe is quickly filled in drilling,
Then the second segment cotton strap expected with polyurethane A, B of a certain amount of mix homogeneously of same uniform application takes out Grouting Pipe and gas
Adopt pipe circumvolution and quickly fill in drilling together, after second segment cotton strap expansion consolidation, with grouting pump by reserving Grouting Pipe
Cement mortar is injected into closing space, sealing of hole sections are formed after slurry consolidation.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510601895.9A CN105201546B (en) | 2015-09-21 | 2015-09-21 | Device and method for improving gas extraction concentration |
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| CN201510601895.9A CN105201546B (en) | 2015-09-21 | 2015-09-21 | Device and method for improving gas extraction concentration |
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| CN105201546B true CN105201546B (en) | 2017-05-17 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108468850A (en) * | 2018-03-16 | 2018-08-31 | 田野 | The closed gas pumping control device of underground coal mine |
| CN110425002B (en) * | 2019-07-09 | 2020-06-19 | 中国矿业大学 | Magnetic control type flow collecting device for improving gas extraction concentration and operation method thereof |
| CN113216934B (en) * | 2021-05-17 | 2022-05-03 | 吕梁学院 | Coal seam gas content measuring device of directional drilling machine |
| CN113405603B (en) * | 2021-06-23 | 2023-03-24 | 中国地质大学（武汉） | Sliding body deep integrated sensor laying device and monitoring method |
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| CN201692749U (en) * | 2009-12-29 | 2011-01-05 | 鄂尔多斯市乌兰煤炭集团有限责任公司 | PSA (pressure swing absorption) separation device for low-concentration gas |
| CN101732947B (en) * | 2010-01-13 | 2013-05-01 | 北京科技大学 | Method for safe adsorption and enrichment of gas with low concentration |
| CN202578754U (en) * | 2012-04-28 | 2012-12-05 | 中国矿业大学 | Pumping draining device for high-concentration gas of drilled holes |
| CN102913273B (en) * | 2012-10-31 | 2014-11-19 | 中国矿业大学 | Autonomous dynamic sealing and gas extraction intelligent system for coal mine |
| WO2014142187A1 (en) * | 2013-03-13 | 2014-09-18 | 東洋炭素株式会社 | Adsorbing/desorbing material |
| CN103316565B (en) * | 2013-06-16 | 2015-03-04 | 中国矿业大学(北京) | Efficient enrichment and separation equipment for ultralow-concentration gas |
| CN103362532B (en) * | 2013-06-28 | 2015-06-24 | 中国矿业大学 | Method for preparing active-carbon-containing colloid gas foam for preventing gas emission in gob |
| CN104653220A (en) * | 2013-11-20 | 2015-05-27 | 西安大昱光电科技有限公司 | Gas extraction sealing mechanism |
| CN104632271A (en) * | 2015-01-12 | 2015-05-20 | 中国矿业大学 | Method for increasing permeability in drilling holes in cold expansion and heat driving mode |
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