CN207527290U - A kind of safe extraction supercharging gathering system in goaf coal bed gas ground - Google Patents
A kind of safe extraction supercharging gathering system in goaf coal bed gas ground Download PDFInfo
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- CN207527290U CN207527290U CN201720855792.XU CN201720855792U CN207527290U CN 207527290 U CN207527290 U CN 207527290U CN 201720855792 U CN201720855792 U CN 201720855792U CN 207527290 U CN207527290 U CN 207527290U
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- screw compressor
- ball valve
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- spark arrester
- goaf
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Abstract
The utility model belongs to coal mine ground goaf coal bed gas extraction technical field, specifically a kind of safe extraction supercharging gathering system in goaf coal bed gas ground.Solve the problems, such as that mined out coal seam gas cannot obtain effective extraction, including ball valve I, check valve, spark arrester, SCREW COMPRESSOR, moisture trap, flowmeter and ball valve II, ball valve I is mounted on the well head of goaf well, ball valve I is connect with check valve, check valve is connect with spark arrester, spark arrester is connect with SCREW COMPRESSOR by seamless steel pipe, sensing methane concentration device and oxygen concentration sensor are installed on the seamless steel pipe between spark arrester and SCREW COMPRESSOR, SCREW COMPRESSOR is equipped with PLC control cabinet, the signal of sensing methane concentration device and oxygen concentration sensor carries out signal transmission with PLC control cabinet, SCREW COMPRESSOR is powered by waterproof anti-explosion switchgear, SCREW COMPRESSOR is connect with moisture trap, moisture trap is connect with flowmeter, flowmeter is connect with ball valve II.
Description
Technical field
The utility model belongs to coal mine ground goaf coal bed gas extraction technical field, specifically a kind of goaf coal bed gas
The safe extraction supercharging gathering system in ground.
Background technology
Coal mine gob coal bed gas is that coal face mines and terminates to accumulate in gas in goaf, mainly into
It is divided into methane（CH4）.Methane is a kind of high-quality clean energy resource, while is mixed with air when reaching a certain concentration, encounters open fire, electricity
Spark etc. can explode.The gas that coal mine gob is gathered is there are security risk, by the gas gathered in extraction goaf,
Goaf and neighbouring tunnel, face gas concentration can be effectively reduced, ensures Safety of Coal Mine Production.
Generally there are two types of modes for the exploitation of coal mine gob coal bed gas：When mining with surface drill well, second is that goaf pipe laying
Extraction, goaf pipe laying extraction is to bury gas pumping pipe when mining and carrying out, according to underground extraction experience, the gas first of extraction
Alkane concentration 10% or so, flow 2m3Gas scale is not achieved using requirement, while gas pumping pipe is often because mining in/min
Rear stress and destroyed, mining with surface drill well has that extraction methane concentration is high, takes out compared with the pipe laying extraction of goaf
Extraction system is not easy the advantages such as destroyed.Coal is developing the relevant technologies with coal bed gas Gong Cai National Key Laboratories.
Invention content
The utility model cannot enter collection transmission pipe network to solve the coal bed gas of ground face goaf well by pressure itself
The problem of problem causes mined out coal seam gas that cannot obtain effective extraction, and resource is not used provides a kind of goaf coal bed gas
The safe extraction supercharging gathering system in ground.
The utility model takes following technical scheme：A kind of safe extraction supercharging gathering system in goaf coal bed gas ground,
Including ball valve I, check valve, spark arrester, SCREW COMPRESSOR, moisture trap, flowmeter and ball valve II, ball valve I is mounted on and adopts
The well head of dead zone well, ball valve I are connect with check valve, and check valve is connect with spark arrester, and spark arrester passes through nothing with SCREW COMPRESSOR
Fastener for connection is stitched, sensing methane concentration device and oxygen concentration are installed on the seamless steel pipe between spark arrester and SCREW COMPRESSOR
Sensor, SCREW COMPRESSOR are equipped with the signal and PLC of PLC control cabinet, sensing methane concentration device and oxygen concentration sensor
Switch board carries out signal transmission, and SCREW COMPRESSOR is powered by waterproof anti-explosion switchgear, SCREW COMPRESSOR and gas-water separation
Device connects, and moisture trap is connect with flowmeter, and flowmeter is connect with ball valve II.
Communication module is installed in the SCREW COMPRESSOR.
Compared with prior art, the utility model has the advantages that：
（1）The utility model can realize the low admission pressure extraction of goaf coal bed gas well（Minimum -30kpa）And it can pass through
Frequency adjusts day extraction amount.
（2）The coal bed gas of extraction can be most pressurized to 300kpa by the utility model, can carry out collecting defeated utilization by pipeline.
（3）The utility model can be monitored, and accomplish methane concentration the methane concentration and oxygen concentration of extraction gas
The high alarm of low, oxygen concentration and methane, oxygen concentration transfinite shutdown.
（4）The operation data of the utility model can remote transmission to computer, accomplish remote monitoring, unattended, it is convenient
Management, safety higher.
Description of the drawings
Fig. 1 is the structure diagram of the utility model；
1- well heads, 2.1- ball valves I, 2.2- ball valve II, 3- check valve, 4- spark arresters, 5- moisture traps, 6- flowmeters,
7- waterproof anti-explosion switchgears, 8- SCREW COMPRESSORs, 9-PLC switch boards, 10- sensing methane concentration devices, 11- oxygen concentrations sensing
Device.
Specific embodiment
The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out
It clearly and completely describes, 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 embodiment in the utility model, those of ordinary skill in the art are without making creative work
All other embodiments obtained shall fall within the protection scope of the present invention.
As shown in Figure 1, a kind of safe extraction supercharging gathering system in goaf coal bed gas ground, including ball valve I2.1, unidirectionally
Valve 3, spark arrester 4, SCREW COMPRESSOR 8, moisture trap 5, flowmeter 6 and ball valve II2.2, ball valve I2.1 are mounted on goaf
The well head 1 of well, ball valve I2.1 are connect with check valve 3, and check valve 3 is connect with spark arrester 4, and spark arrester 4 is logical with SCREW COMPRESSOR 8
Cross seamless steel pipe connection, be equipped on the seamless steel pipe between spark arrester 4 and SCREW COMPRESSOR 8 sensing methane concentration device 10 and
Oxygen concentration sensor 11, SCREW COMPRESSOR 8 are equipped with PLC control cabinet 9, sensing methane concentration device 10 and oxygen concentration sensing
The signal of device 11 carries out signal transmission with PLC control cabinet 9, and SCREW COMPRESSOR 8 is powered by waterproof anti-explosion switchgear 7, screw rod
Compressor set 8 is connect with moisture trap 5, and moisture trap 5 is connect with flowmeter 6, and flowmeter 6 is connect with ball valve II2.2.
The warning concentration of methane is set as 45%, concentration is shut down and is set as 40%, the warning concentration of oxygen is set as 6%, stops
Machine concentration is set as 8%, and PLC is reprogramed, and realizes methane concentration and oxygen concentration monitoring, alarms and the stopping function that transfinites.
Communication module is installed in the SCREW COMPRESSOR 8, realizes the computer remote monitoring function of operating condition.
According to knowhow, the goaf coal bed gas well individual well daily output is no more than 5000m3/ d, the helical-lobe compressor of selection
Air inflow is 5500Nm under group standard state3/ d connects seamless steel pipe the choice of diameter D76mm, the detailed ginseng of SCREW COMPRESSOR
Number is shown in Table 1.
Table 1：SCREW COMPRESSOR technical parameter.
| Serial number | Project | Parameter |
| 1 | Volume flow | 5.45 m3/min |
| 2 | Pressure of inspiration(Pi) | -0.03 MPa（G） |
| 3 | Pressure at expulsion | 0.25~0.3 MPa（G） |
| 4 | Delivery temperature | ≤100 ℃ |
| 5 | Power of motor | 22 kW |
| 6 | Rated voltage | 380 V |
| 7 | Rated frequency | 5~60 Hz |
| 8 | Explosion-proof mark | ExdⅡBT4 |
| 9 | Rotating speed | 2980 rpm |
| 10 | Type of drive | Main motor and compressor direct connection |
Although the utility model is described in detail with reference to the foregoing embodiments, those skilled in the art is come
Say, can still modify to the technical solution recorded in foregoing embodiments or to which part technical characteristic into
Row equivalent replacement, within the spirit and principle of the utility model, any modification, equivalent replacement, improvement and so on should all
It is included within the scope of protection of this utility model.
Claims (2)
1. a kind of safe extraction supercharging gathering system in goaf coal bed gas ground, it is characterised in that：Including ball valve I（2.1）, it is unidirectional
Valve（3）, spark arrester（4）, SCREW COMPRESSOR（8）, moisture trap（5）, flowmeter（6）With ball valve II（2.2）, ball valve I
（2.1）Mounted on the well head of goaf well（1）, ball valve I（2.1）With check valve（3）Connection, check valve（3）With spark arrester（4）Even
It connects, spark arrester（4）With SCREW COMPRESSOR（8）It is connected by seamless steel pipe, spark arrester（4）With SCREW COMPRESSOR（8）Between
Seamless steel pipe on sensing methane concentration device is installed（10）And oxygen concentration sensor（11）, SCREW COMPRESSOR（8）On set
There is PLC control cabinet（9）, sensing methane concentration device（10）And oxygen concentration sensor（11）Signal and PLC control cabinet（9）It carries out
Signal transmission, SCREW COMPRESSOR（8）Pass through waterproof anti-explosion switchgear（7）Power supply, SCREW COMPRESSOR（8）With moisture trap
（5）Connection, moisture trap（5）With flowmeter（6）Connection, flowmeter（6）With ball valve II（2.2）Connection.
2. the safe extraction supercharging gathering system in goaf coal bed gas ground according to claim 1, it is characterised in that：It is described
SCREW COMPRESSOR（8）On communication module is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720855792.XU CN207527290U (en) | 2017-07-14 | 2017-07-14 | A kind of safe extraction supercharging gathering system in goaf coal bed gas ground |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720855792.XU CN207527290U (en) | 2017-07-14 | 2017-07-14 | A kind of safe extraction supercharging gathering system in goaf coal bed gas ground |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207527290U true CN207527290U (en) | 2018-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720855792.XU Active CN207527290U (en) | 2017-07-14 | 2017-07-14 | A kind of safe extraction supercharging gathering system in goaf coal bed gas ground |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109139093A (en) * | 2018-10-24 | 2019-01-04 | 太原理工大学 | A kind of ground drilling low concentration coal-bed gas methane drainage and utilization project system |
| CN110499196A (en) * | 2019-05-13 | 2019-11-26 | 宁波鲍斯能源装备股份有限公司 | A kind of whole sledge booster station gas collecting apparatus |
-
2017
- 2017-07-14 CN CN201720855792.XU patent/CN207527290U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109139093A (en) * | 2018-10-24 | 2019-01-04 | 太原理工大学 | A kind of ground drilling low concentration coal-bed gas methane drainage and utilization project system |
| CN110499196A (en) * | 2019-05-13 | 2019-11-26 | 宁波鲍斯能源装备股份有限公司 | A kind of whole sledge booster station gas collecting apparatus |
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