CN104775843B - A kind of liquid nitrogen fireproof fire-extinguishing system and method - Google Patents
A kind of liquid nitrogen fireproof fire-extinguishing system and method Download PDFInfo
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- CN104775843B CN104775843B CN201510154969.9A CN201510154969A CN104775843B CN 104775843 B CN104775843 B CN 104775843B CN 201510154969 A CN201510154969 A CN 201510154969A CN 104775843 B CN104775843 B CN 104775843B
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- liquid nitrogen
- goaf
- nitrogen
- pipe
- branch road
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 446
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 222
- 239000007788 liquid Substances 0.000 title claims abstract description 168
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000007789 gas Substances 0.000 claims abstract description 31
- 238000002309 gasification Methods 0.000 claims abstract description 30
- 238000012544 monitoring process Methods 0.000 claims abstract description 4
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 230000000903 blocking effect Effects 0.000 claims description 2
- 239000012530 fluid Substances 0.000 claims description 2
- 239000011261 inert gas Substances 0.000 abstract description 4
- 230000000505 pernicious effect Effects 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000003245 coal Substances 0.000 description 6
- 230000002269 spontaneous effect Effects 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 3
- 239000002775 capsule Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000010412 perfusion Effects 0.000 description 2
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F3/00—Cooling or drying of air
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Pipe Accessories (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
Abstract
The invention discloses a kind of liquid nitrogen fireproof fire-extinguishing system, including liquid nitrogen tank car, the liquid nitrogen tank car has been sequentially connected with pump, vertical and liquid nitrogen conveying supervisor, the liquid nitrogen that liquid nitrogen conveying supervisor is connected to for liquid nitrogen to be injected into goaf directly notes pipe and the liquid nitrogen gasification device for liquid nitrogen gasification to be reinjected to the goaf into nitrogen, and it is provided with exhaust duct in the goaf, the exhaust duct connects air return pipeline, the sensor being additionally provided with the first control valve, goaf for monitoring pressure is provided with exhaust duct；The invention also discloses a kind of liquid nitrogen fireproof fire-extinguishing method.Beneficial effects of the present invention：By setting exhaust duct in goaf, when the pressure in goaf is more than predetermined value, air in goaf can be discharged, so as to reduce the pressure in goaf, nitrogen rate of flooding is improved, and is prevented from the inert gas in goaf and pernicious gas and is escaped into the presence of high pressure at the crack of goaf upper corner in workspace.
Description
Technical field
The present invention relates to underground coal mine fire prevention falling temperature technique, more particularly to a kind of liquid nitrogen fireproof fire-extinguishing system and method.
Background technology
According to statistics, there is the dangerous mine of spontaneous fire in China's State owned coal mine and account for 51.3%, because spontaneous combustion is drawn
The fire risen accounts for more than the 90% of total fire number, and the preventing and treating of working face Residual coal in goaf spontaneous fire is always influence safety of coal mines
Problem.
Conventional conventional preventing and extinguishing fire technology mainly has slip casting, note retardant, note nitrogen etc. at this stage.Can using nitrogen extinguishing
The large-scale flame range of several myriametres is put out rapidly, can suppress flammable gas explosion in flame range again, improves the security in fire extinguishing procedure.It is special
It is not to utilize liquid nitrogen extinguishment, liquid nitrogen can absorb substantial amounts of heat in gasification, it is possible to decrease the environment temperature in goaf, prevents
The only float coal oxidation and spontaneous combustion in goaf, or quickly put out due to the big fire that float coal oxidation and spontaneous combustion is produced, but in injection liquid nitrogen
After nitrogen, the atmospheric pressure in goaf becomes big, because the density of nitrogen is smaller, to continue to irrigate nitrogen change into goaf
Obtain difficult, cause nitrogen rate of flooding to decline, it is impossible to quickly to put out big fire；And can be because roof caving at the upper corner of goaf
Crack is produced etc. reason, if goaf pressure is excessive, pernicious gas (such as gas) and inert gas in goaf can be
Workspace is escaped into the presence of high pressure from crack, harm is brought to workspace.
The content of the invention
Present invention aims to overcome that there is provided a kind of liquid nitrogen fireproof fire-extinguishing system and method for defect of the prior art.
The present invention provides a kind of liquid nitrogen fireproof fire-extinguishing system, including liquid nitrogen tank car, the liquid nitrogen tank car be sequentially connected with pump,
Vertical and liquid nitrogen conveying supervisor, the liquid nitrogen that the liquid nitrogen conveying supervisor is connected to for liquid nitrogen to be injected into goaf are directly noted
Pipe and the liquid nitrogen gasification device for liquid nitrogen gasification to be reinjected to the goaf into nitrogen, and be provided with the goaf
Exhaust duct, the exhaust duct is connected to be provided with for connecting or blocking the fluid in pipeline on air return pipeline, the exhaust duct
The sensor for monitoring the atmospheric pressure in the goaf, sensor are additionally provided with first control valve, the goaf
Controller is all connected to the first control valve, the controller is used to receive the signal that the sensor is sent, and according to described
Signal is turned on and off the first control valve.
Further, the liquid nitrogen gasification device is connected to main gasbag and branch road air bag, and the main gasbag is connected with
Main note gas nitrogen pipe for nitrogen to be injected into the goaf, the branch road air bag is connected with described for nitrogen to be injected into
The branch road note gas nitrogen pipe in goaf, wherein, the main gasbag and the branch road air bag are used to be arranged at the upper corner of goaf.
Further, the vertical is connected by turning with liquid nitrogen conveying supervisor.
Further, the turning includes the first bend pipe and the second bend pipe, wherein, first bend pipe is arranged to siphunculus,
Second bend pipe is arranged to blind pipe, and one end of first bend pipe is connected with the openend of second bend pipe, and described first
The other end of bend pipe is connected with liquid nitrogen conveying supervisor.
Further, between the liquid nitrogen tank car, the pump, the vertical connecting tube and liquid nitrogen conveying supervisor is equal
For insulating tube
Further, the pump is low temperature liquid nitrogen pump.
Further, it is provided with relief valve on the liquid nitrogen conveying supervisor.
Present invention also offers a kind of liquid nitrogen fireproof fire-extinguishing method of use said system, comprise the following steps：
Step 1)：Open pump and liquid nitrogen is transported to vertical from liquid nitrogen tank car；
Step 2)：Liquid nitrogen is transported to by liquid nitrogen conveying supervisor by the vertical, the liquid nitrogen conveying supervisor divides liquid nitrogen
Liquid nitrogen is not delivered to and directly notes pipe and liquid nitrogen gasification device, and the liquid nitrogen directly notes pipe and liquid nitrogen is injected into goaf, the liquid nitrogen gasification
Device is by liquid nitrogen gasification into being injected into the goaf after nitrogen；
Step 3)：When the atmospheric pressure in the goaf that sensor is measured is more than predetermined value, controller is opened and set
The first control valve on exhaust duct is put, the air in the goaf is transported to air return pipeline.
Further, the step 2) described in liquid nitrogen gasification device liquid nitrogen is transported to main gasbag and branch road gas respectively
Nitrogen is injected into the goaf by capsule, the main gasbag by main note gas nitrogen pipe, and the branch road air bag passes through branch road gas injection nitrogen
Nitrogen is injected into the goaf by pipe, wherein, the main gasbag and the branch road air bag are separately positioned on goaf upper corner
Place.
Further, the step 2) in, liquid nitrogen is transported to the liquid nitrogen conveying by turning and is responsible for by the vertical.
Beneficial effects of the present invention：By setting exhaust duct in goaf, when the atmospheric pressure in goaf is due to injection
When liquid nitrogen and nitrogen are more than predetermined value, open first and control valve, discharged the air in goaf by exhaust duct, so as to reduce
The pressure in goaf, reduces the perfusion resistance of nitrogen, improves nitrogen rate of flooding；And by discharging in time, it will effectively adopt
Atmospheric pressure in dead zone is controlled below predetermined value, so as to prevent inert gas and pernicious gas in goaf in high pressure
Escaped under effect at the crack of goaf upper corner in workspace.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to institute in embodiment
The accompanying drawing needed to use is briefly described, it should be apparent that, drawings in the following description are only some implementations of the present invention
Example, for those of ordinary skill in the art, on the premise of not paying creative work, can also be obtained according to these accompanying drawings
Obtain other accompanying drawings.
Fig. 1 is the structural representation of the liquid nitrogen fireproof fire-extinguishing system of the embodiment of the present invention.
In figure：
1st, liquid nitrogen tank car；2nd, the second control valve；3rd, low temperature liquid nitrogen pump；4th, pressure gauge；5th, vertical；6th, turning；7th, relief valve；
8th, liquid nitrogen conveying supervisor；9th, the first triple valve；10th, liquid nitrogen directly notes pipe；11st, the 3rd control valve；12nd, the 4th control valve；13rd, liquid nitrogen
Gasification installation；14th, the second triple valve；15th, main gasbag；16th, the 5th control valve；17th, main note gas nitrogen pipe；18th, branch road air bag；19、
6th control valve；20th, branch road note gas nitrogen pipe；21st, exhaust duct；22nd, the first control valve；23rd, air return pipeline.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the present invention, based on the invention structure in the present invention
Think, the every other embodiment that those of ordinary skill in the art are obtained belongs to the scope of protection of the invention.
As shown in figure 1, embodiments in accordance with the present invention, liquid nitrogen fireproof fire-extinguishing system includes being used to store and transporting liquid nitrogen
Liquid nitrogen tank car 1, liquid nitrogen tank car 1 is sequentially connected with pump 3, vertical 5 and the liquid nitrogen being arranged under mine conveying supervisor 8, liquid nitrogen conveying
Supervisor 8 is connected to liquid nitrogen by the first triple valve 9 and directly notes pipe 10 and liquid nitrogen gasification device 13, liquid nitrogen directly note pipe 10 be used for will
Liquid nitrogen is injected into goaf, and liquid nitrogen gasification device 13 is used to liquid nitrogen gasification first is injected into goaf by nitrogen again into nitrogen, and
Exhaust duct 21 is provided with the goaf, exhaust duct 21 is connected to the air return pipeline 23 being arranged in workspace, wherein, return air
Pipeline 23 is that the first control valve is provided with the air return pipeline of the existing ventilating system for being arranged on workspace, air exhaust duct 21
22, the sensor for monitoring the atmospheric pressure in goaf is additionally provided with goaf, sensor and the first control valve 22 are equal
Controller is connected to, controller receives the signal that sensor is sent, and is turned on and off the first control valve 22 according to signal, specifically
Ground, when the atmospheric pressure in the goaf that sensor is measured is more than predetermined value, opens first and controls valve 22, when sensor is measured
Goaf in atmospheric pressure be less than predetermined value when, close first control valve 22.
In use, when sensor detects atmospheric pressure in goaf because injection liquid nitrogen and nitrogen are more than predetermined value
When, controller opens the first control valve being arranged on exhaust duct 21, thus connects in goaf with air return pipeline 23, will be mined out
Air discharge in area, to reduce the pressure in goaf, facilitates the perfusion of nitrogen, improves the rate of flooding of nitrogen；And lead to
The connection goaf of setting exhaust duct 21 and air return pipeline 23 are crossed, the pressure in goaf is controlled below predetermined value, so that anti-
Only the inert gas and pernicious gas in goaf escape into work in the presence of high pressure at the crack of goaf upper corner
Qu Zhong.
In practical application, pump 3 is low temperature liquid nitrogen pump, and low temperature liquid nitrogen pump can protect the low temperature liquid nitrogen from liquid nitrogen tank car 1
Vertical 5 is transported to after temperature pressurization；Between liquid nitrogen conveying supervisor 8 and liquid nitrogen tank car 1 and pump 3, the connection between pump 3 and vertical 5
Pipeline uses insulating tube, and insulating tube can be adiabatic, the heat exchange between liquid nitrogen and external environment condition is reduced, to keep liquid nitrogen
Low temperature, it is to avoid liquid nitrogen gasification.
Preferably, liquid nitrogen gasification device 13 connects the air inlet and branch road gas of main gasbag 15 by the second triple valve 14 respectively
The air inlet of capsule 18, the gas outlet of main gasbag 15 is connected with the main note gas nitrogen pipe 17 for being mainly used to that nitrogen is injected into goaf, branch
The branch road that the gas outlet of road air bag 18 is connected with for nitrogen to be injected into mined out gas notes gas nitrogen pipe 20, wherein main gasbag 15 and branch
Road air bag 18 is arranged at the upper corner of goaf.Dead zone upper corner is stepped on by the way that main gasbag 15 and branch road air bag 18 are arranged on
Place, main gasbag 15 and branch road air bag 18 can be resisted against on the crack at the upper corner of goaf when being filled with nitrogen expansion, produced
Deformable seal crack, so as to reduce the gas leakage stepped at the upper corner of dead zone.
Multiple control valves are provided with the system so that user can have more actual demand selection and use liquid nitrogen or nitrogen
Gas is put out a fire, or uses liquid nitrogen and nitrogen extinguishing, specifically, the be provided between liquid nitrogen tank car 1 and low temperature liquid nitrogen pump 3 simultaneously
Two control valves 2, liquid nitrogen, which is directly noted, is provided with the 3rd control valve 11 on pipe 10, set between the first triple valve 9 and liquid nitrogen gasification device 13
It is equipped with the 4th control valve 12, main note gas nitrogen pipe 17 and is provided with the 5th control valve 16, the 6th is provided with branch road note gas nitrogen pipe 20
Control valve 19.When needing to use liquid nitrogen extinguishment, open second and control the control valve 11 of valve 2 and the 3rd, liquid nitrogen is passed through from liquid nitrogen tank car 1
Liquid nitrogen conveying supervisor 8 is crossed, pipe 10 is directly noted eventually through liquid nitrogen liquid nitrogen is filled into goaf；When needing to utilize nitrogen extinguishing,
Open second and control the control valve 12 of valve the 2, the 4th, and the 5th control control valve 19 of valve 16 and/or the 6th, liquid nitrogen is from liquid nitrogen tank car
1 by liquid nitrogen conveying supervisor 8 and liquid nitrogen gasification device 13, will eventually through main note gas nitrogen pipe 17 and/or branch road note gas nitrogen pipe 20
Nitrogen is filled into goaf；When needing simultaneously using liquid nitrogen and nitrogen extinguishing, then second valve 2 is controlled, the 3rd controls valve 11, the
Four control valves 12, and the 5th control control valve 19 of valve 16 and/or the 6th are all kept it turned on.
Preferably, vertical 5 is connected by being arranged on the turning 6 of the lower end of vertical 5 with liquid nitrogen conveying supervisor 8, and the turning 6 is wrapped
Include the first bend pipe and the second bend pipe, the first bend pipe is arranged to siphunculus, the second bend pipe is arranged to blind pipe, one end of the first bend pipe and the
The openend connection of two bend pipes, one end of the first bend pipe is connected with liquid nitrogen conveying supervisor 8,.The meeting in transportation due to liquid nitrogen
Gasify, it is possible to the air pressure in transport pipeline can be caused excessive, liquid nitrogen is shot back, when liquid nitrogen conveys the liquid in supervisor 8
When resilience occurs for nitrogen, the liquid nitrogen of resilience can be entered in the second bend pipe, play a part of buffering.
Relief valve 7 is provided with liquid nitrogen conveying supervisor 8, when liquid nitrogen conveying supervisor 8 is interior because liquid nitrogen gasification causes air pressure mistake
When big, relief valve 7 is opened, gas unnecessary in pipeline is discharged, internal pressure is reduced, makes liquid nitrogen conveying smooth.Low temperature liquid nitrogen
Pressure gauge 4 is provided between pump 3 and vertical 5, the pressure of the liquid nitrogen into vertical 5 can be observed at any time by pressure gauge 4.
A kind of liquid nitrogen fireproof fire-extinguishing method of use said system, comprises the following steps：
Step 1)：Open pump 3 and liquid nitrogen is transported to vertical 5 from liquid nitrogen tank car 1；
Step 2)：Liquid nitrogen is transported to the liquid nitrogen conveying supervisor 8 being arranged in workspace, the liquid by the vertical 5
Liquid nitrogen is delivered to liquid nitrogen and directly notes pipe 10 and liquid nitrogen gasification device 13 by nitrogen conveying supervisor 8 respectively, and the liquid nitrogen directly notes pipe 10 by liquid
Nitrogen injects goaf, and the liquid nitrogen gasification device 13 is by liquid nitrogen gasification into being injected into the goaf after nitrogen；
Step 3)：When the atmospheric pressure in the goaf that sensor is measured is more than predetermined value, opens first and control
Valve 22, is arranged on the internal emission of mining space airduct 21 and the air in the goaf is transported into air return pipeline 23.
Preferably, liquid nitrogen is transported to main gasbag 15 and branch road air bag 18, the master by the liquid nitrogen gasification device 13 respectively
Nitrogen is injected into goaf by air bag 15 by main note gas nitrogen pipe 17, and the branch road air bag 18 notes gas nitrogen pipe 20 by nitrogen by pair
Goaf is injected into, wherein, the main gasbag 15 and the branch road air bag 18 are separately positioned on goaf upper corner.
Preferably, liquid nitrogen is transported to liquid nitrogen conveying supervisor by vertical 5 by turning 6.
Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the invention, all essences in the present invention
God is with principle, and any modifications, equivalent substitutions and improvements made etc. should be included within the scope of the present invention.
Claims (10)
1. a kind of liquid nitrogen fireproof fire-extinguishing system, it is characterised in that：Including liquid nitrogen tank car (1), the liquid nitrogen tank car (1) is sequentially connected with
There are pump (3), vertical (5) and liquid nitrogen conveying supervisor (8), the liquid nitrogen conveying supervisor (8) is connected to for liquid nitrogen to be injected
Liquid nitrogen to goaf directly notes pipe (10) and the liquid nitrogen gasification device for liquid nitrogen gasification to be reinjected to the goaf into nitrogen
(13) exhaust duct (21), exhaust duct (21) the connection air return pipeline (23), the air draft, and in the goaf are provided with
It is provided with the first control valve (22) for connecting or blocking the fluid in pipeline, the goaf and is additionally provided with pipe (21)
Sensor for monitoring the atmospheric pressure in the goaf, sensor and the first control valve (22) are all connected to control
Device, the controller is used to receive the signal that the sensor is sent, and is turned on and off first control according to the signal
Valve (22) processed.
2. liquid nitrogen fireproof fire-extinguishing system according to claim 1, it is characterised in that：The liquid nitrogen gasification device (13) is respectively
Main gasbag (15) and branch road air bag (18) are connected with, the main gasbag (15) is connected with for nitrogen to be injected into the goaf
Main note gas nitrogen pipe (17), the branch road air bag (18) is connected with the branch road gas injection nitrogen for nitrogen to be injected into the goaf
Manage (20), wherein, the main gasbag (15) and the branch road air bag (18) are used to be arranged at the upper corner of goaf.
3. liquid nitrogen fireproof fire-extinguishing system according to claim 1 or 2, it is characterised in that：The vertical (5) passes through turning
(6) it is connected with liquid nitrogen conveying supervisor (8).
4. liquid nitrogen fireproof fire-extinguishing system according to claim 3, it is characterised in that：The turning (6) includes the first bend pipe
With the second bend pipe, wherein, first bend pipe is arranged to siphunculus, and second bend pipe is arranged to blind pipe, first bend pipe
One end is connected with the openend of second bend pipe, and the other end of first bend pipe is connected with liquid nitrogen conveying supervisor (8).
5. liquid nitrogen fireproof fire-extinguishing system according to claim 3, it is characterised in that：The liquid nitrogen tank car (1), the pump
(3) connecting tube and liquid nitrogen conveying supervisor (8), between the vertical (5) is insulating tube.
6. liquid nitrogen fireproof fire-extinguishing system according to claim 3, it is characterised in that：The pump (3) is low temperature liquid nitrogen pump
(3)。
7. liquid nitrogen fireproof fire-extinguishing system according to claim 3, it is characterised in that：Set on the liquid nitrogen conveying supervisor (8)
It is equipped with relief valve (7).
8. a kind of liquid nitrogen fireproof fire-extinguishing method of system described in usage right requirement 1, it is characterised in that：Comprise the following steps：
Step 1)：Open pump (3) and liquid nitrogen is transported to vertical (5) from liquid nitrogen tank car (1)；
Step 2)：Liquid nitrogen is transported to by liquid nitrogen conveying supervisor (8) by the vertical (5), the liquid nitrogen conveying is responsible for (8) by liquid
Nitrogen is delivered to liquid nitrogen and directly notes pipe (10) and liquid nitrogen gasification device (13) respectively, and the liquid nitrogen directly notes pipe (10) and liquid nitrogen is injected into mined out
Area, the liquid nitrogen gasification device (13) is by liquid nitrogen gasification into being injected into the goaf after nitrogen；
Step 3)：When the atmospheric pressure in the goaf that sensor is measured is more than predetermined value, controller is opened and is arranged on
The first control valve (22) on exhaust duct (21), air return pipeline (23) is transported to by the air in the goaf.
9. liquid nitrogen fireproof fire-extinguishing method according to claim 8, it is characterised in that：The step 2) described in liquid nitrogen gasification
Liquid nitrogen is transported to main gasbag (15) and branch road air bag (18) by device (13) respectively, and the main gasbag (15) passes through main note gas nitrogen pipe
(17) nitrogen is injected into the goaf, the branch road air bag (18) notes gas nitrogen pipe (20) by branch road and nitrogen is injected into institute
Goaf is stated, wherein, the main gasbag (15) and the branch road air bag (18) are separately positioned at the upper corner of goaf.
10. liquid nitrogen fireproof fire-extinguishing method according to claim 8, it is characterised in that：The step 2) in, the vertical
(5) liquid nitrogen is transported to the liquid nitrogen conveying supervisor (8) by turning (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510154969.9A CN104775843B (en) | 2015-04-02 | 2015-04-02 | A kind of liquid nitrogen fireproof fire-extinguishing system and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510154969.9A CN104775843B (en) | 2015-04-02 | 2015-04-02 | A kind of liquid nitrogen fireproof fire-extinguishing system and method |
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| CN104775843A CN104775843A (en) | 2015-07-15 |
| CN104775843B true CN104775843B (en) | 2017-07-11 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105484787A (en) * | 2015-12-29 | 2016-04-13 | 神华集团有限责任公司 | Coal-mine liquid-nitrogen fire-prevention cooling system and method |
| CN106552386B (en) * | 2016-11-21 | 2019-02-01 | 中国矿业大学 | A kind of tank farm liquid nitrogen self-extinguishing explosion suppression system |
| CN106884672B (en) * | 2017-04-25 | 2019-02-12 | 中国矿业大学(北京) | A kind of mining mobile dry ice phase transformation fire extinguishing system and the method for implementing fire extinguishing |
| CN107435553A (en) * | 2017-08-03 | 2017-12-05 | 肥城白庄煤矿有限公司 | Extinguishing device and method for well industrial and mineral well shaft |
| CN108222999B (en) * | 2018-01-26 | 2024-07-19 | 宁夏德大气体开发科技有限公司 | Liquid carbon dioxide cooling fire prevention and extinguishing system |
| CN108635714B (en) * | 2018-03-29 | 2023-06-13 | 中国矿业大学 | Deep underground fire-fighting system |
| CN110985095A (en) * | 2019-12-16 | 2020-04-10 | 神华包头能源有限责任公司 | Goaf grouting nitrogen injection fire prevention and extinguishing method |
| CN112843549A (en) * | 2021-01-15 | 2021-05-28 | 邓惠荣 | Method for extinguishing underground fire by high-pressure direct injection and low-temperature liquid nitrogen |
| CN116427988B (en) * | 2023-05-31 | 2024-01-23 | 中煤科工集团重庆研究院有限公司 | Gas mine surface drilling fire extinguishing method based on liquid nitrogen filling |
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| RU2199667C2 (en) * | 2000-11-23 | 2003-02-27 | Федеральное государственное унитарное предприятие "Российский научно-исследовательский институт горноспасательного дела" | Procedure preventing and suppressing endogenous fires in developed space |
| CN202250150U (en) * | 2011-09-21 | 2012-05-30 | 李景阳 | Liquid nitrogen cooling, fire prevention, fire extinguishing system |
| CN102562125B (en) * | 2012-02-08 | 2013-10-30 | 中国矿业大学 | Ground direct injection type liquid nitrogen fire preventing and extinguishing system |
| CN204591333U (en) * | 2015-04-02 | 2015-08-26 | 神华集团有限责任公司 | A kind of liquid nitrogen fireproof fire-extinguishing system |
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