CN105401972B - The safe extraction intelligence control system of coal bed gas and control method - Google Patents
The safe extraction intelligence control system of coal bed gas and control method Download PDFInfo
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- CN105401972B CN105401972B CN201510557233.6A CN201510557233A CN105401972B CN 105401972 B CN105401972 B CN 105401972B CN 201510557233 A CN201510557233 A CN 201510557233A CN 105401972 B CN105401972 B CN 105401972B
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- 238000000605 extraction Methods 0.000 title claims abstract description 141
- 239000003245 coal Substances 0.000 title claims abstract description 80
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000007789 gas Substances 0.000 claims description 190
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 174
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 30
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 29
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 claims description 25
- 238000006243 chemical reaction Methods 0.000 claims description 24
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 claims description 17
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 16
- 239000001301 oxygen Substances 0.000 claims description 16
- 229910052760 oxygen Inorganic materials 0.000 claims description 16
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 14
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 14
- 238000012544 monitoring process Methods 0.000 claims description 14
- 239000005977 Ethylene Substances 0.000 claims description 7
- 229910052757 nitrogen Inorganic materials 0.000 claims description 7
- 239000008186 active pharmaceutical agent Substances 0.000 claims description 6
- 230000003647 oxidation Effects 0.000 claims description 5
- 238000007254 oxidation reaction Methods 0.000 claims description 5
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 238000005553 drilling Methods 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 230000000903 blocking effect Effects 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 238000004134 energy conservation Methods 0.000 abstract description 4
- 230000002093 peripheral effect Effects 0.000 abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- 238000001816 cooling Methods 0.000 description 9
- 230000001105 regulatory effect Effects 0.000 description 7
- 239000007858 starting material Substances 0.000 description 7
- 230000005611 electricity Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000001815 facial effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The present invention relates to a kind of safe extraction intelligence control system of coal bed gas and control method, including using programmable controller as core, programmable controller is electrically connected management system, signal acquiring system, execution system, and feature is：Management system is computer, and signal acquiring system includes the sensor for being arranged at diverse location in gas drainage pipeline, and execution system includes control gas drainage pump running status system, is arranged at the electrically operated valve group of gas drainage pipeline diverse location.Realized by key-course, management level, signals layer, execution level to coal seam or the safe extraction intelligent control of goaf coal bed gas, in combination with control method, ensure multi-parameter judgement and intelligent control, the a variety of related peripheral systems of parallel-connection network, once by parameter estimator, find potential safety hazard, can autocommand peripheral system action, remove a hidden danger, while pass through the comprehensive descision to system mode, it is ensured that system operates in a safety, energy-conservation, efficient, economy, the state of intelligent extraction always.
Description
Technical field
The present invention relates to coal bed gas extraction control system and control technology, more particularly to a kind of safe extraction intelligence of coal bed gas
Control system and control method.
Background technology
Coal bed gas methane drainage and utilization project in China's is enlivened in recent years, and coal bed gas extraction amount raises year by year, but China's coal bed gas extraction
Monitoring system, which is only supervised, does not control and controls the not in place of management, and extraction causes the spontaneous combustion in coal seam, extraction pipeline to inhale people, extraction
The security incidents such as pipeline gas explosion happen occasionally, and extraction efficiency is low, greatly limit China's coal bed gas industrial expansion；China
Extraction pump and can exploit the consideration in later stage in order to expand later, and the reserve factor of design is higher, often big extraction pump, small extraction
Amount, causes the waste of electric power resource；In order to promote the intellectuality of the safe extraction of coal bed gas, the prison of the safe extraction of coal bed gas is improved
Survey and controlled level, are badly in need of a kind of safe extraction intelligence control system of coal bed gas and control method, realize safety, the section of coal bed gas
Energy, economy, intelligent extraction.
The content of the invention
It is an object of the invention to overcome prior art insufficient, provide a kind of safe extraction intelligence control system of coal bed gas and
Control method.
The technical solution adopted for the present invention to solve the technical problems is：There is provided a kind of coal bed gas safe extraction intelligent control
System, including using programmable controller as core, programmable controller is electrically connected management system, signal acquiring system, held
Row system, feature are：Management system is computer, and signal acquiring system includes being arranged at diverse location in gas drainage pipeline
Carbon monoxide transducer, methane transducer, acetylene sensor, ethylene sensor, oxygen sensor, temperature sensor, flow
Sensor, B/P EGR Back Pressure Transducer EGR, positive pressure sensor, the high-voltage feedback power that execution system includes control gas drainage pump running status are opened
Pass, high-voltage vacuum electromagnetic starter, frequency conversion system, explosion-proof feeding switch, the low pressure magnetic starter of water pump operation are controlled, if
Being placed in the electrically operated valve group of gas drainage pipeline diverse location includes being arranged on the above gas drainage pipeline of ground entering pneumoelectric
Dynamic regulating valve, cross gas electric control valve, exhaust electric control valve, outlet electric control valve.
Wherein：Management system also includes operating desk, touch-screen, during coal bed gas extraction, below ground gas drainage pipeline
Interior setting carbon monoxide transducer, methane transducer, valve, ground above gas drainage pipeline order set air inlet motorized adjustment
Valve, cross gas electric control valve, methane transducer, temperature sensor, carbon monoxide transducer, ethylene sensor, acetylene sensor,
B/P EGR Back Pressure Transducer EGR, flow sensor, gas suction pump, methane transducer, positive pressure sensor, flow sensor, exhaust electric adjustable
Valve, outlet electric control valve are saved, programmable controller also electrically connects underground nitrogen-filling system, gas suction pump pipe connection cooling respectively
Device, water pump, pipe connects cooling device, water pump respectively in pond.
Wherein：Management system also includes operating desk, touch-screen, during goaf gas extraction, below ground gas drainage pipe
Oxygen sensor, methane transducer, temperature sensor, carbon monoxide transducer, ethylene sensor, acetylene sensing are set in road
Device, B/P EGR Back Pressure Transducer EGR, flow sensor, ground above gas drainage pipeline order set air inlet electric control valve, pneumoelectric excessively to move
Regulating valve, methane transducer, temperature sensor, carbon monoxide transducer, B/P EGR Back Pressure Transducer EGR, flow sensor, gas suction pump,
Methane transducer, positive pressure sensor, flow sensor, exhaust electric control valve, outlet electric control valve, programmable controller is also
Underground nitrogen-filling system, mine supervision system are electrically connected, pipe connects cooling device, water pump to gas suction pump respectively, and pond is managed respectively
Connect cooling device, water pump.
A kind of control method of the safe extraction intelligence control system of coal bed gas, including extraction system is started by management system
System, feature are：During coal bed gas extraction, methane transducer concentration is less than lower limit value DX in the pipeline of ground, and it is electronic to open exhaust
Regulating valve, device in Gas is emptied, and close outlet electric control valve, stop supplying gas utilization system, methane in the pipeline of ground
Sensor concentration is more than ceiling value GX, and being gradually opened air inlet electric control valve injection air reduces methane concentration in lower limit value and height
Between limit value GX, when the carbonomonoxide concentration that the carbon monoxide transducer in the pipeline of coal seam measures is more than or equal to coal seam accelerated oxidation
Concentration limit A, or temperature sensor temperature are more than or equal to warm limit value WX, or ethylene sensor concentration value is more than or equal to minimum value
YZ, or acetylene sensor concentration are more than or equal to limiting value JZ, and programmable controller shut-off high-voltage feedback power switch, explosion-proof feeding are opened
Pass, gas electric control valve is crossed, stop extraction, carrying out note nitrogen to corresponding coal seam by programmable controller startup underground nitrogen-filling system goes out
Fire, when the carbonomonoxide concentration that the carbon monoxide transducer in the pipeline of coal seam measures naked light concentration limit occurs more than or equal to coal seam
B, or acetylene sensor concentration are more than or equal to limiting value JZ, and alarm processing, ground line are sent by the mine supervision system of access
When B/P EGR Back Pressure Transducer EGR measures negative pressure value and is less than or equal to determined threshold D in road, programmable controller is gradually stepped up watt by frequency conversion system
This extraction revolution speed, when B/P EGR Back Pressure Transducer EGR measures negative pressure value and is more than or equal to ceiling value G in the pipeline of ground, programmable controller leads to
Crossing frequency conversion system gradually reduces gas drainage under suction revolution speed, and after speed governing, B/P EGR Back Pressure Transducer EGR measures negative pressure value also in the pipeline of ground
During less than or equal to super determined threshold CD, programmable controller shut-off high-voltage feedback power switch, explosion-proof feeding switch, gas electric adjustable is crossed
Valve is saved, stops extraction, when negative pressure variation rate, which is more than or equal to, blocks determination value DS, extraction pipeline blocks, programmable controller shut-off
High-voltage feedback power switch, explosion-proof feeding switch, gas electric control valve is crossed, stop extraction, processing blocks.
Wherein：When methane transducer of some drilling measures methane concentration value and is less than or equal to high-low limits GD, correspondence is closed
When valve, ground methane transducer measure methane concentration value and are less than or equal to high-low limits GD, programmable controller shut-off high pressure feedback
Electric switch, explosion-proof feeding switch, gas electric control valve is crossed, stop extraction, gas suction pump front end flow sensor measures
Flow value is less than or equal to lower limit value LD, stops extraction, as below the DL of flow-reduction to initial value, while gas density is as little as former
During below the WZ of value, drill gas leakage, stops extraction, handles gas leakage, when the ratio of extraction amount and specified extraction amount is less than definite value
During BZ, programmable controller gradually reduces gas drainage under suction revolution speed by frequency conversion system, saves extraction.
Wherein：Pass through the methane of the methane transducer of gas suction pump front end, flow sensor and gas suction pump rear end
The absolute value that sensor, flow sensor obtain corresponding deviation ratio is more than or equal to DB, and tracking and monitoring coal bed gas is taken out safely at any time
The working condition of intelligence control system is adopted, is made by management system and stops extraction or control measure.
A kind of control method of the safe extraction intelligence control system of coal bed gas, including extraction system is started by management system
System, feature are：During goaf gas extraction, methane transducer concentration is less than lower limit value DX in the pipeline of ground, opens exhaust electricity
Dynamic regulating valve, empties device in Gas, and closes outlet electric control valve, stops supplying gas utilization system, first in the pipeline of ground
Alkane sensor concentration is more than ceiling value GX, and being gradually opened air inlet electric control valve injection air reduces methane concentration in lower limit value DX
Between ceiling value GX, when the carbonomonoxide concentration that the carbon monoxide transducer in the pipeline of below ground goaf measures be more than etc.
In coal seam accelerated oxidation concentration limit A, or temperature sensor temperature is more than or equal to warm limit value WX, or ethylene sensor concentration value is big
In equal to minimum value YZ, programmable controller shut-off high-voltage feedback power switch, explosion-proof feeding switch, gas electric control valve is crossed, stopped
Only extraction, underground nitrogen-filling system is started by programmable controller corresponding coal seam is carried out to note nitrogen fire extinguishing, when in the pipeline of goaf
There is naked light concentration limit B more than or equal to coal seam in the carbonomonoxide concentration that carbon monoxide transducer measures, or acetylene sensor is dense
Degree is more than or equal to limiting value JZ, sends alarm processing by the mine supervision system of access, B/P EGR Back Pressure Transducer EGR is surveyed in the pipeline of ground
Negative pressure value when being less than or equal to determined threshold D, programmable controller gradually steps up gas drainage under suction revolution speed, ground by frequency conversion system
When B/P EGR Back Pressure Transducer EGR measures negative pressure value and is more than or equal to ceiling value G in facial canal road, programmable controller is gradually dropped by frequency conversion system
Present low gas extraction revolution speed, B/P EGR Back Pressure Transducer EGR, which measures negative pressure value and is also less than, after speed governing, in the pipeline of ground is equal to super determined threshold
During CD, programmable controller shut-off high-voltage feedback power switch, explosion-proof feeding switch, gas electric control valve is crossed, stop extraction, when
When negative pressure variation rate is more than or equal to blocking determination value DS, extraction pipeline blocks, programmable controller shut-off high-voltage feedback power switch, flame proof
Type feeding switch, gas electric control valve is crossed, stop extraction, processing blocks.
Wherein：When ground pipeline methane transducer measures methane concentration value and is less than or equal to low lower limit value DD, PLC technology
Device shut-off high-voltage feedback power switch, explosion-proof feeding switch, gas electric control valve is crossed, stop extraction, gas suction pump front end flow
The flow value that sensor measures is less than or equal to lower limit value LD, stops extraction, as below the DL of flow-reduction to initial value, while watt
During this concentration as little as below WZ of initial value, goaf pipeline gas leakage, stop extraction, handle pipeline gas leakage, when extraction amount with it is specified
When the ratio of extraction amount is less than the BZ of definite value, programmable controller reduces gas drainage under suction revolution speed by frequency conversion system, and energy-conservation is taken out
Adopt.
Wherein：Pass through the methane of the methane transducer of gas suction pump front end, flow sensor and gas suction pump rear end
The absolute value that sensor, flow sensor obtain corresponding deviation ratio is more than or equal to DB, and tracking and monitoring coal bed gas is taken out safely at any time
The working condition of intelligence control system is adopted, is made by management system and stops extraction or control measure, below ground goaf pipe
Methane transducer, temperature sensor, carbon monoxide transducer, B/P EGR Back Pressure Transducer EGR, flow sensor and ground are with upper pipeline in road
In methane（Sensor, temperature sensor, carbon monoxide transducer, B/P EGR Back Pressure Transducer EGR, flow sensor obtain corresponding deviation ratio
Value, the working condition of the safe extraction intelligence control system of tracking and monitoring coal bed gas, stopping extraction being made by management system at any time
Or control measure, when oxygen sensor concentration is more than YD values, programmable controller gradually reduces gas by frequency conversion system and taken out
Revolution speed is put, is less than or equal to YD values to oxygen sensor concentration, when the pressure that positive pressure sensor measures is higher than GDZ values, gradually
Exhaust motorized adjustment valve exhaust is opened, the pressure that positive pressure sensor measures is less than or equal to GDZ values.
The beneficial effects of the invention are as follows：Mainly using programmable controller as core, programmable controller is electrically connected pipe
Reason system, signal acquiring system, execution system, realized by key-course, management level, signals layer, execution level to coal seam or mined out
The safe extraction intelligent control of area's coal bed gas, in combination with the control method of the safe extraction intelligence control system of coal bed gas, not only takes
For traditional single parameter regulating system extraction state, it is ensured that multi-parameter judges and intelligent control, a variety of related peripheral systems of parallel-connection network
System, once by parameter estimator, find potential safety hazard, can the action of autocommand peripheral system, remove a hidden danger, while by being
The comprehensive descision of system state, it is ensured that system operates in a safety, energy-conservation, efficient, economy, the state of intelligent extraction always.
Brief description of the drawings
The present invention will be further described with reference to the accompanying drawings and detailed description.
Fig. 1 structural principle block diagrams of the present invention；
Fig. 2 principle schematic diagrams of the present invention；
Structural representation during Fig. 3 coal bed gas extractions of the present invention；
Structural representation during Fig. 4 goaf gas extractions of the present invention.
In figure:1. methane（CH4）Sensor, 3. temperature（T）Sensor, 5. carbon monoxide（CO）Sensor, 7. ethene
（C2H4）Sensor, 9. acetylene（C2H2）Sensor, 11. negative pressure（P-）Sensor, 13. flows（L）Sensor, 17. malleations
（P+）Sensor, 121. electrically operated valve groups（KFM）, 125. explosion-proof feeding switch（QBZ）, 127. high pressure vacuum electromagnetism
Dynamic device（GQJZ）, 129. high-voltage feedback powers switch（GQBZ）, 301. coal seams one, 303. coal seams two, 317. air inlet electric control valves,
341. exhaust electric control valves, 343. gas electricity units, 345. nitrogen-filling systems, 349. programmable controllers（PLC）, 351.
Computer, 353. operating desks, 355. touch-screens, 357. low pressure magnetic starters（QJZ）, 359. cross gas electric control valve,
361. frequency conversion system（BPXT）, 363. cooling devices, 365. ponds, 367. water pumps, 369. gas suction pumps, 371. outlets
Electric control valve, 401. oxygen（O2）Sensor, 411. valves, 475. goafs, 511. management systems, 515. perform system
System, 517. signal acquiring systems.
Embodiment
Embodiment one
Referring to Fig. 1, Fig. 2, Fig. 3, a kind of safe extraction intelligence control system of coal bed gas, including with programmable controller
（PLC）349 be core, programmable controller（PLC）349 are electrically connected management system 511, signal acquiring system 517, perform
System 515, feature is：Management system 511 is computer 351, and signal acquiring system 517 includes being arranged at gas drainage pipeline
The carbon monoxide of interior diverse location（CO）Sensor 5, methane（CH4）Sensor 1, acetylene（C2H2）Sensor 9, ethene（C2H4）Pass
Sensor 7, oxygen（O2）Sensor 401, temperature（T）Sensor 3, flow（L）Sensor 13, negative pressure（P-）Sensor 11, malleation
（P+）Sensor 17, the high-voltage feedback power that execution system 515 includes the running status of control gas drainage pump 369 switch（GQBZ）129、
High-voltage vacuum electromagnetic starter（GQJZ）127th, frequency conversion system（BPXT）361, the explosion-proof feeding switch that control water pump 367 is run
（QBZ）125th, low pressure magnetic starter（QJZ）357, it is arranged at the electrically operated valve group of gas drainage pipeline diverse location（KFM）
The 121 air inlet electric control valves 317 for including being arranged on the above gas drainage pipeline of ground, cross gas electric control valve 359, exhaust
Electric control valve 341, outlet electric control valve 371.
Wherein：Management system 511 also includes operating desk 353, touch-screen 355, during coal bed gas extraction, below ground gas
Carbon monoxide is set in extraction pipeline（CO）Sensor 5, methane（CH4）Sensor 1, valve 411, ground above gas drainage pipe
Road order sets air inlet electric control valve 317, crosses gas electric control valve 359, methane（CH4）Sensor 1, temperature（T）Sensor
3rd, carbon monoxide（CO）Sensor 5, ethene（C2H4）Sensor 7, acetylene（C2H2）Sensor 9, negative pressure（P-）Sensor 11, stream
Amount（L）Sensor 13, gas suction pump 369, methane（CH4）Sensor 1, malleation（P+）Sensor 17, flow（L）Sensor
13rd, electric control valve 341, outlet electric control valve 371, programmable controller are vented（PLC）349 also electrically connect underground note nitrogen system
System（ZDXT）345, pipe connects cooling device 363, water pump 367, the pipe connection cooling respectively of pond 365 to gas suction pump 369 respectively
Device 363, water pump 367.
A kind of control method of the safe extraction intelligence control system of coal bed gas, including extraction is started by management system 511
System, feature are：During coal bed gas extraction, methane in the pipeline of ground（CH4）The concentration of sensor 1 is less than lower limit value DX=8%,
Exhaust electric control valve 341 is opened, empties device in Gas, and closes outlet electric control valve 371, is stopped to gas utilization system
（Gas electricity unit 343）Supply, methane in the pipeline of ground（CH4）The concentration of sensor 1 is more than ceiling value GX=25%, is gradually opened
Air inlet electric control valve 317, which injects air, reduces methane concentration between lower limit value DX=8% and ceiling value GX=25%, works as coal seam
Carbon monoxide in pipeline（CO）The carbonomonoxide concentration that sensor 5 measures be more than or equal to coal seam accelerated oxidation concentration limit A=
60ppm, or temperature（T）The temperature of sensor 3 is more than or equal to warm limit value WX=60 DEG C, or ethene（C2H4）The concentration value of sensor 7 is more than
Equal to minimum value YZ=1ppm, or acetylene（C2H2）The concentration of sensor 9 is more than or equal to limiting value JZ=1ppm, programmable controller
（PLC）349 shut-off high-voltage feedback power switches（GQBZ）129th, explosion-proof feeding switch（QBZ）125th, gas electric control valve 359 is crossed, is stopped
Only extraction, by programmable controller（PLC）349 start underground nitrogen-filling system（ZDXT）345 pairs of corresponding coal seams carry out noting nitrogen fire extinguishing,
Carbon monoxide in the pipeline of coal seam（CO）There is naked light concentration limit more than or equal to coal seam in the carbonomonoxide concentration that sensor 5 measures
Value B=100ppm, or acetylene（C2H2）The concentration of sensor 9 is more than or equal to limiting value JZ=1ppm, passes through the mine supervision system of access
Unite and send alarm processing, negative pressure in the pipeline of ground（P-）When sensor 11 measures negative pressure value and is less than or equal to determined threshold D=25kPa,
Programmable controller（PLC）349 pass through frequency conversion system（BPXT）361 gradually step up the rotating speed of gas suction pump 369, in the pipeline of ground
Negative pressure（P-）When sensor 11 measures negative pressure value and is more than or equal to ceiling value G=80kPa, programmable controller（PLC）349 pass through change
Display system（BPXT）361 gradually reduce the rotating speed of gas suction pump 369, after speed governing, negative pressure in the pipeline of ground（P-）Sensor
11 measure negative pressure value also less than when being equal to super determined threshold CD=13kPa, programmable controller（PLC）349 shut-off high-voltage feedback powers are opened
Close（GQBZ）129th, explosion-proof feeding switch（QBZ）125th, gas electric control valve 359 is crossed, stops extraction, when negative pressure variation rate is big
When equal to determination value DS=10 kPa/s is blocked, extraction pipeline blocks, programmable controller（PLC）349 shut-off high-voltage feedback power switches
（GQBZ）129th, explosion-proof feeding switch（QBZ）125th, gas electric control valve 359 is crossed, stops extraction, processing blocks.
Wherein：The methane of some drilling（CH4）Sensor 1 measures methane concentration value and is less than or equal to high-low limits GD=15%
When, close corresponding valve 411, ground methane（CH4）When sensor 1 measures methane concentration value less than or equal to high-low limits GD=1%,
Programmable controller（PLC）349 shut-off high-voltage feedback power switches（GQBZ）129th, explosion-proof feeding switch（QBZ）125th, pneumoelectric is crossed to move
Regulating valve 359, stop extraction, the front end flow of gas suction pump 369（L）The flow value that sensor 13 measures is less than or equal to lower limit value
LD=0.1m3/ min, stop extraction, when below DL=50% of flow-reduction to initial value, while the WZ of gas density as little as initial value
When less than=50%, drill gas leakage, stops extraction, handles gas leakage, when the ratio of extraction amount and specified extraction amount be less than the BZ of definite value=
When 50%, programmable controller（PLC）349 pass through frequency conversion system（BPXT）361 gradually reduce the rotating speed of gas suction pump 369, energy-conservation
Extraction.
Wherein：Pass through the methane of the front end of gas suction pump 369（CH4）Sensor 1, flow（L）Sensor 13 is taken out with gas
Put the methane of the rear end of pump 369（CH4）Sensor 1, flow（L）The absolute value that sensor 13 obtains corresponding deviation ratio is more than or equal to
The working condition of DB=10%, the at any time safe extraction intelligence control system of tracking and monitoring coal bed gas, is made by management system 511 and stopped
Only extraction or control measure.
Embodiment two
Referring to Fig. 1, Fig. 2, Fig. 4, a kind of safe extraction intelligence control system of coal bed gas, including with programmable controller
（PLC）349 be core, programmable controller（PLC）349 are electrically connected management system 511, signal acquiring system 517, perform
System 515, feature is：Management system 511 is computer 351, and signal acquiring system 517 includes being arranged at gas drainage pipeline
The carbon monoxide of interior diverse location（CO）Sensor 5, methane（CH4）Sensor 1, acetylene（C2H2）Sensor 9, ethene（C2H4）Pass
Sensor 7, oxygen（O2）Sensor 401, temperature（T）Sensor 3, flow（L）Sensor 13, negative pressure（P-）Sensor 11, malleation
（P+）Sensor 17, the high-voltage feedback power that execution system 515 includes the running status of control gas drainage pump 369 switch（GQBZ）129、
High-voltage vacuum electromagnetic starter（GQJZ）127th, frequency conversion system（BPXT）361, the explosion-proof feeding switch that control water pump 367 is run
（QBZ）125th, low pressure magnetic starter（QJZ）357, it is arranged at the electrically operated valve group of gas drainage pipeline diverse location（KFM）
The 121 air inlet electric control valves 317 for including being arranged on the above gas drainage pipeline of ground, cross gas electric control valve 359, exhaust
Electric control valve 341, outlet electric control valve 371.
Wherein：Management system 511 also includes operating desk 353, touch-screen 355, during 475 gas pumping of goaf, ground with
Oxygen is set in lower gas drainage pipeline（O2）Sensor 401, methane（CH4）Sensor 1, temperature（T）Sensor 3, carbon monoxide
（CO）Sensor 5, ethene（C2H4）Sensor 7, acetylene（C2H2）Sensor 9, negative pressure（P-）Sensor 11, flow（L）Sensor
13, above gas drainage pipeline order in ground sets air inlet electric control valve 317, crosses gas electric control valve 359, methane（CH4）
Sensor 1, temperature（T）Sensor 3, carbon monoxide（CO）Sensor 5, negative pressure（P-）Sensor 11, flow（L）Sensor 13,
Gas suction pump 369, methane（CH4）Sensor 1, malleation（P+）Sensor 17, flow（L）Sensor 13, exhaust motorized adjustment
Valve 341, outlet electric control valve 371, programmable controller（PLC）349 also electrically connect underground nitrogen-filling system（ZDXT）345th, coal
Ore deposit monitoring system, pipe connects cooling device 363, water pump 367 to gas suction pump 369 respectively, and pipe connection cooling fills respectively in pond 365
Put 363, water pump 367.
A kind of control method of the safe extraction intelligence control system of coal bed gas, including extraction is started by management system 511
System, feature are：During 475 gas pumping of goaf, methane in the pipeline of ground（CH4）The concentration of sensor 1 is less than lower limit value DX
=8%, exhaust electric control valve 341 is opened, empties device in Gas, and outlet electric control valve 371 is closed, stop to gas utilization system
System（Gas electricity unit 343）Supply, methane in the pipeline of ground（CH4）The concentration of sensor 1 is more than ceiling value GX=25%, gradually beats
Drive gas electric control valve 317 into and inject air reduction methane concentration between lower limit value DX=8% and ceiling value GX=25%, it is local
Carbon monoxide in the pipeline of goaf 475 below face（CO）The carbonomonoxide concentration that sensor 5 measures accelerates more than or equal to coal seam
Aoxidize concentration limit A=60ppm, or temperature（T）The temperature of sensor 3 is more than or equal to warm limit value WX=60 DEG C, or ethene（C2H4）Sensing
The concentration value of device 7 is more than or equal to minimum value YZ=1ppm, programmable controller（PLC）349 shut-off high-voltage feedback power switches（GQBZ）129、
Explosion-proof feeding switch（QBZ）125th, gas electric control valve 359 is crossed, stops extraction, by programmable controller（PLC）349 start
Underground nitrogen-filling system（ZDXT）345 pairs of corresponding coal seams carry out noting nitrogen fire extinguishing, the carbon monoxide in the pipeline of goaf 475（CO）Pass
There is naked light concentration limit B=100ppm, or acetylene more than or equal to coal seam in the carbonomonoxide concentration that sensor 5 measures（C2H2）Sensing
The concentration of device 9 is more than or equal to limiting value JZ=1ppm, sends alarm processing by the mine supervision system of access, is born in the pipeline of ground
Pressure（P-）When sensor 11 measures negative pressure value and is less than or equal to determined threshold D=25kPa, programmable controller（PLC）349 pass through frequency conversion
System（BPXT）361 gradually step up the rotating speed of gas suction pump 369, negative pressure in the pipeline of ground（P-）It is big that sensor 11 measures negative pressure value
When equal to ceiling value G=80kPa, programmable controller（PLC）349 pass through frequency conversion system（BPXT）361 gradually reduce gas
The rotating speed of drainage pump 369, after speed governing, negative pressure in the pipeline of ground（P-）Sensor 11 measures negative pressure value and is also less than equal to the super lowest limit
During value CD=5kPa, programmable controller（PLC）349 shut-off high-voltage feedback power switches（GQBZ）129th, explosion-proof feeding switch
（QBZ）125th, gas electric control valve 359 is crossed, stops extraction, the kPa/s of determination value DS=10 is blocked when negative pressure variation rate is more than or equal to
When, extraction pipeline blocks, programmable controller（PLC）349 shut-off high-voltage feedback power switches（GQBZ）129th, explosion-proof feeding switch
（QBZ）125th, gas electric control valve 359 is crossed, stops extraction, processing blocks.
Wherein：Ground pipeline methane（CH4）When sensor 1 measures methane concentration value less than or equal to low lower limit value DD=1%,
Programmable controller（PLC）349 shut-off high-voltage feedback power switches（GQBZ）129th, explosion-proof feeding switch（QBZ）125th, pneumoelectric is crossed to move
Regulating valve 359, stop extraction, the front end flow of gas suction pump 369（L）The flow value that sensor 13 measures is less than or equal to lower limit value
LD=0.1m3/ min, stop extraction, when below DL=50% of flow-reduction to initial value, while the WZ of gas density as little as initial value
When less than=50%, goaf pipeline gas leakage, stop extraction, pipeline gas leakage is handled, when the ratio of extraction amount and specified extraction amount is small
When the BZ=50% of definite value, programmable controller（PLC）349 pass through frequency conversion system（BPXT）361 reduce by 369 turns of gas suction pump
Speed, save extraction.
Wherein：Pass through the methane of the front end of gas suction pump 369（CH4）Sensor 1, flow（L）Sensor 13 is taken out with gas
Put the methane of the rear end of pump 369（CH4）Sensor 1, flow（L）The absolute value that sensor 13 obtains corresponding deviation ratio is more than or equal to
The working condition of DB=10%, the at any time safe extraction intelligence control system of tracking and monitoring coal bed gas, is made by management system 511 and stopped
Only extraction or control measure, methane in the pipeline of below ground goaf 475（CH4）Sensor 1, temperature（T）Sensor 3, an oxygen
Change carbon（CO）Sensor 5, negative pressure（P-）Sensor 11, flow（L）Sensor 13 is with ground with the methane in upper pipeline（CH4）Pass
Sensor 1, temperature（T）Sensor 3, carbon monoxide（CO）Sensor 5, negative pressure（P-）Sensor 11, flow（L）Sensor 13 obtains
Corresponding deviation ratio, the working condition of the safe extraction intelligence control system of tracking and monitoring coal bed gas, passes through management system 511 at any time
Make and stop extraction or control measure, work as oxygen（O2）When the concentration of sensor 401 is more than YD=7% value, programmable controller（PLC）
349 pass through frequency conversion system（BPXT）361 gradually reduce the rotating speed of gas suction pump 369, to oxygen（O2）The concentration of sensor 401 is less than
It is worth equal to YD=7%, works as malleation（P+）The pressure that sensor 17 measures is higher than the kPa of GDZ=20（Span 10kPa-50 kPa）
During value, it is gradually opened exhaust electric control valve 341 and is vented, make malleation（P+）The pressure that sensor 17 measures is less than or equal to GDZ=20
kPa（KPa -50 kPa of span 10）Value.
Claims (8)
1. a kind of control method of the safe extraction intelligence control system of coal bed gas, including extraction system is started by management system,
It is characterised by：During coal bed gas extraction, methane transducer concentration is less than lower limit value DX in the pipeline of ground, opens exhaust electric adjustable
Valve is saved, empties device in Gas, and closes outlet electric control valve, stops supplying gas utilization system, methane passes in the pipeline of ground
Sensor concentration is more than ceiling value GX, and being gradually opened air inlet electric control valve injection air reduces methane concentration in lower limit value and high limit
Between value GX, when the carbonomonoxide concentration that the carbon monoxide transducer in the pipeline of coal seam measures is dense more than or equal to coal seam accelerated oxidation
Limit value A is spent, or temperature sensor temperature is more than or equal to warm limit value WX, or ethylene sensor concentration value is more than or equal to minimum value YZ,
Or acetylene sensor concentration is more than or equal to limiting value JZ, programmable controller shut-off high-voltage feedback power switch, explosion-proof feeding switch,
Gas electric control valve is crossed, stops extraction, start underground nitrogen-filling system by programmable controller carries out noting nitrogen fire extinguishing to corresponding coal seam,
When there is naked light concentration limit B more than or equal to coal seam in the carbonomonoxide concentration that the carbon monoxide transducer in the pipeline of coal seam measures,
Or acetylene sensor concentration is more than or equal to limiting value JZ, alarm processing, ground pipeline are sent by the mine supervision system of access
When middle B/P EGR Back Pressure Transducer EGR measures negative pressure value and is less than or equal to determined threshold D, programmable controller gradually steps up gas by frequency conversion system
Extraction revolution speed, when B/P EGR Back Pressure Transducer EGR measures negative pressure value and is more than or equal to ceiling value G in the pipeline of ground, programmable controller passes through change
Display system gradually reduces gas drainage under suction revolution speed, and after speed governing, B/P EGR Back Pressure Transducer EGR measures negative pressure value and is also less than in the pipeline of ground
During equal to super determined threshold CD, programmable controller shut-off high-voltage feedback power switch, explosion-proof feeding switch, gas electric control valve is crossed,
Stop extraction, when negative pressure variation rate, which is more than or equal to, blocks determination value DS, extraction pipeline blocks, programmable controller shut-off high pressure feedback
Electric switch, explosion-proof feeding switch, gas electric control valve is crossed, stop extraction, processing blocks.
A kind of 2. control method of the safe extraction intelligence control system of coal bed gas according to claim 1, it is characterised in that：
When methane transducer of some drilling measures methane concentration value and is less than or equal to high-low limits GD, correspondence valve, ground methane are closed
When sensor measures methane concentration value and is less than or equal to high-low limits GD, programmable controller shut-off high-voltage feedback power switch, flame-proof type
Feeding switch, gas electric control valve is crossed, stop extraction, the flow value that gas suction pump front end flow sensor measures is less than or equal to
Lower limit value LD, stop extraction, as below the DL of flow-reduction to initial value, while during gas density as little as below the WZ of initial value,
Drill gas leakage, stops extraction, handles gas leakage, when the ratio of extraction amount and specified extraction amount is less than the BZ of definite value, programmable control
Device processed gradually reduces gas drainage under suction revolution speed by frequency conversion system, saves extraction.
A kind of 3. control method of the safe extraction intelligence control system of coal bed gas according to claim 1, it is characterised in that：
Passed by the methane transducer of gas suction pump front end, the methane transducer of flow sensor and gas suction pump rear end, flow
The absolute value that sensor obtains corresponding deviation ratio is more than or equal to DB, at any time the safe extraction intelligence control system of tracking and monitoring coal bed gas
Working condition, made by management system and stop extraction or control measure.
A kind of 4. control method of the safe extraction intelligence control system of coal bed gas according to claim 2, it is characterised in that：
Passed by the methane transducer of gas suction pump front end, the methane transducer of flow sensor and gas suction pump rear end, flow
The absolute value that sensor obtains corresponding deviation ratio is more than or equal to DB, at any time the safe extraction intelligence control system of tracking and monitoring coal bed gas
Working condition, made by management system and stop extraction or control measure.
5. a kind of control method of the safe extraction intelligence control system of coal bed gas, including extraction system is started by management system,
It is characterised by：During goaf gas extraction, methane transducer concentration is less than lower limit value DX in the pipeline of ground, opens exhaust electric adjustable
Valve is saved, empties device in Gas, and closes outlet electric control valve, stops supplying gas utilization system, methane passes in the pipeline of ground
Sensor concentration is more than ceiling value GX, and being gradually opened air inlet electric control valve injection air reduces methane concentration in lower limit value DX and height
Between limit value GX, when the carbonomonoxide concentration that the carbon monoxide transducer in the pipeline of below ground goaf measures is more than or equal to coal
Layer accelerated oxidation concentration limit A, or temperature sensor temperature are more than or equal to warm limit value WX, or ethylene sensor concentration value more than etc.
In minimum value YZ, programmable controller shut-off high-voltage feedback power switch, explosion-proof feeding switch, gas electric control valve is crossed, stop taking out
Adopt, start underground nitrogen-filling system by programmable controller carries out noting nitrogen fire extinguishing to corresponding coal seam, when the oxygen in the pipeline of goaf
Change the carbonomonoxide concentration that measures of carbon sensor and naked light concentration limit B occur more than or equal to coal seam, or acetylene sensor concentration is big
In equal to limiting value JZ, alarm processing is sent by the mine supervision system of access, B/P EGR Back Pressure Transducer EGR measures negative in the pipeline of ground
When pressure value is less than or equal to determined threshold D, programmable controller gradually steps up gas drainage under suction revolution speed, ground pipeline by frequency conversion system
When middle B/P EGR Back Pressure Transducer EGR measures negative pressure value and is more than or equal to ceiling value G, programmable controller gradually reduces gas by frequency conversion system
Extraction revolution speed, after speed governing, B/P EGR Back Pressure Transducer EGR measures negative pressure value also less than when being equal to super determined threshold CD in the pipeline of ground, can
Programmable controller shut-off high-voltage feedback power switch, explosion-proof feeding switch, gas electric control valve is crossed, stop extraction, work as negative pressure variation
When rate is more than or equal to blocking determination value DS, extraction pipeline is blocked, and programmable controller shut-off high-voltage feedback power switch, explosion-proof feeding are opened
Close, cross gas electric control valve, stop extraction, processing blocks.
A kind of 6. control method of the safe extraction intelligence control system of coal bed gas according to claim 5, it is characterised in that：
When ground pipeline methane transducer measures methane concentration value and is less than or equal to low lower limit value DD, programmable controller shut-off high-voltage feedback power
Switch, explosion-proof feeding switch, gas electric control valve is crossed, stop extraction, the stream that gas suction pump front end flow sensor measures
Value is less than or equal to lower limit value LD, stops extraction, as below the DL of flow-reduction to initial value, while gas density as little as initial value
Below WZ when, goaf pipeline gas leakage, stop extraction, handle pipeline gas leakage, when the ratio of extraction amount and specified extraction amount is small
When the BZ of definite value, programmable controller reduces gas drainage under suction revolution speed by frequency conversion system, saves extraction.
A kind of 7. control method of the safe extraction intelligence control system of coal bed gas according to claim 5, it is characterised in that：
Passed by the methane transducer of gas suction pump front end, the methane transducer of flow sensor and gas suction pump rear end, flow
The absolute value that sensor obtains corresponding deviation ratio is more than or equal to DB, at any time the safe extraction intelligence control system of tracking and monitoring coal bed gas
Working condition, made by management system and stop extraction or control measure, methane transducer in the pipeline of below ground goaf,
Temperature sensor, carbon monoxide transducer, B/P EGR Back Pressure Transducer EGR, flow sensor and ground are with the methane in upper pipeline（Sensor,
Temperature sensor, carbon monoxide transducer, B/P EGR Back Pressure Transducer EGR, flow sensor obtain corresponding deviation ratio, at any time tracking and monitoring
The working condition of the safe extraction intelligence control system of coal bed gas, made by management system and stop extraction or control measure, work as oxygen
When gas sensor concentration is more than YD values, programmable controller gradually reduces gas drainage under suction revolution speed by frequency conversion system, to oxygen
Sensor concentration is less than or equal to YD values, when the pressure that positive pressure sensor measures is higher than GDZ values, is gradually opened exhaust motorized adjustment
Valve exhaust, the pressure that positive pressure sensor measures is set to be less than or equal to GDZ values.
A kind of 8. control method of the safe extraction intelligence control system of coal bed gas according to claim 6, it is characterised in that：
Passed by the methane transducer of gas suction pump front end, the methane transducer of flow sensor and gas suction pump rear end, flow
The absolute value that sensor obtains corresponding deviation ratio is more than or equal to DB, at any time the safe extraction intelligence control system of tracking and monitoring coal bed gas
Working condition, made by management system and stop extraction or control measure, methane transducer in the pipeline of below ground goaf,
Temperature sensor, carbon monoxide transducer, B/P EGR Back Pressure Transducer EGR, flow sensor and ground are with the methane in upper pipeline（Sensor,
Temperature sensor, carbon monoxide transducer, B/P EGR Back Pressure Transducer EGR, flow sensor obtain corresponding deviation ratio, at any time tracking and monitoring
The working condition of the safe extraction intelligence control system of coal bed gas, made by management system and stop extraction or control measure, work as oxygen
When gas sensor concentration is more than YD values, programmable controller gradually reduces gas drainage under suction revolution speed by frequency conversion system, to oxygen
Sensor concentration is less than or equal to YD values, when the pressure that positive pressure sensor measures is higher than GDZ values, is gradually opened exhaust motorized adjustment
Valve exhaust, the pressure that positive pressure sensor measures is set to be less than or equal to GDZ values.
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