CN104775843A - Liquid nitrogen fireproof fire extinguishing system and method - Google Patents
Liquid nitrogen fireproof fire extinguishing system and method Download PDFInfo
- Publication number
- CN104775843A CN104775843A CN201510154969.9A CN201510154969A CN104775843A CN 104775843 A CN104775843 A CN 104775843A CN 201510154969 A CN201510154969 A CN 201510154969A CN 104775843 A CN104775843 A CN 104775843A
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- Prior art keywords
- liquid nitrogen
- goaf
- nitrogen
- pipe
- fireproof fire
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 454
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 227
- 239000007788 liquid Substances 0.000 title claims abstract description 169
- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000007789 gas Substances 0.000 claims abstract description 29
- 238000012544 monitoring process Methods 0.000 claims abstract description 4
- 238000009834 vaporization Methods 0.000 claims description 24
- 230000008016 vaporization Effects 0.000 claims description 24
- 230000000903 blocking effect Effects 0.000 claims description 2
- 239000012530 fluid Substances 0.000 claims description 2
- 238000002347 injection Methods 0.000 abstract description 5
- 239000007924 injection Substances 0.000 abstract description 5
- 239000011261 inert gas Substances 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000003245 coal Substances 0.000 description 6
- 238000002309 gasification Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000002269 spontaneous effect Effects 0.000 description 4
- 230000000505 pernicious effect Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000010412 perfusion Effects 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 1
- 230000019771 cognition Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
- 238000009423 ventilation 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
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- 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 liquid nitrogen fireproof fire extinguishing system, comprising a liquid nitrogen tank car; the liquid nitrogen tank car is connected with a pump, a vertical shaft and a liquid nitrogen conveying main pipe in sequence; the liquid nitrogen conveying main pipe is connected with a liquid nitrogen direct injection pipe for injecting liquid nitrogen into a goaf and a liquid nitrogen gasifying device for gasifying the liquid nitrogen into nitrogen and then injecting the nitrogen into the goaf; the goaf is integrally provided with an exhaust pipe connected with an air return pipeline; the exhaust pipe is provided with a first control valve; the goaf is internally provided with a sensor for monitoring pressure. The invention also discloses a liquid nitrogen fireproof fire extinguishing method. The liquid nitrogen fireproof fire extinguishing system and the method have the beneficial effects that the exhaust pipe is arranged in the goaf, when the pressure in the goaf is larger than a preset value, air in the goaf can be exhausted, so the pressure of the goaf is reduced, the nitrogen filling speed is improved, and inert gas and harmful gas in the goaf are prevented from escaping from cracks in upper edges corners of the goaf into a working area under action of high pressure.
Description
Technical field
The present invention relates to underground coal mine fire prevention falling temperature technique, particularly relate to a kind of liquid nitrogen fireproof fire-extinguishing system and method.
Background technology
According to statistics, the mine that there is spontaneous fire danger in China's State owned coal mine accounts for 51.3%, and the fire caused due to spontaneous combustion accounts for more than 90% of total fire number, and the control of work plane Residual coal in goaf spontaneous fire is the difficult problem affecting safety of coal mines always.
The conventional preventing and extinguishing fire technology that present stage is commonly used mainly contains slip casting, note retardant, note nitrogen etc.Utilize nitrogen extinguishing can put out rapidly the large-scale flame range of a few myriametre, flammable gas explosion in flame range can be suppressed again, improve the safety in fire extinguishing procedure.Particularly utilize liquid nitrogen extinguishment, liquid nitrogen, in gasification, can absorb a large amount of heats, can reduce the environment temperature in goaf, prevent the float coal oxidation nature in goaf, or put out fast because float coal is oxidized spontaneous big fire, but after injection liquid nitrogen and nitrogen, the atmospheric pressure in goaf becomes large, because the density of nitrogen is less, continue in goaf, pour into nitrogen and become difficulty, cause nitrogen rate of flooding to decline, big fire can not be put out fast; And upper corner place, goaf can because the reasons such as roof caving produce crack, if goaf pressure is excessive, pernicious gas (such as gas) in goaf and indifferent gas cognition escape into workspace under the effect of high pressure from crack, bring harm to workspace.
Summary of the invention
The object of the invention is to overcome defect of the prior art, provides a kind of liquid nitrogen fireproof fire-extinguishing system and method.
The invention provides a kind of liquid nitrogen fireproof fire-extinguishing system, comprise liquid nitrogen tank car, described liquid nitrogen tank car is connected with pump in turn, vertical and liquid nitrogen conveying supervisor, the described liquid nitrogen conveying supervisor liquid nitrogen be connected to for liquid nitrogen being injected into goaf is directly noted pipe and is used for liquid nitrogen vaporization to become nitrogen and reinjects the liquid nitrogen vaporization device in described goaf, and be provided with exhaust duct in described goaf, described exhaust duct connects air return pipeline, described exhaust duct is provided with the first control valve for being communicated with or blocking the fluid in pipeline, the sensor for monitoring the atmospheric pressure in described goaf is also provided with in described goaf, sensor and the first control valve are all connected to controller, the signal that described controller sends for receiving described sensor, and according to described unblanking or close described first control valve.
Further, described liquid nitrogen vaporization device is connected to main gasbag and branch road air bag, described main gasbag is connected with the main note gas nitrogen pipe for nitrogen being injected into described goaf, described branch road air bag is connected with the branch road note gas nitrogen pipe for nitrogen being injected into described goaf, wherein, described main gasbag and described branch road air bag are all for being arranged on upper corner place, goaf.
Further, described vertical is carried to be responsible for by turning and described liquid nitrogen and is connected.
Further, described turning comprises the first bend pipe and the second bend pipe, wherein, siphunculus is arranged to by described first bend pipe, blind pipe is arranged to by described second bend pipe, one end of described first bend pipe is connected with the openend of described second bend pipe, and the other end and the described liquid nitrogen of described first bend pipe are carried to be responsible for and be connected.
Further, the tube connector between described liquid nitrogen tank car, described pump, described vertical and described liquid nitrogen conveying supervisor are insulating tube
Further, described pump is low temperature liquid nitrogen pump.
Further, described liquid nitrogen conveying supervisor is provided with relief valve.
Present invention also offers a kind of liquid nitrogen fireproof fire-extinguishing method adopting said system, comprise the following steps:
Step 1): open pump and liquid nitrogen is transported to vertical from liquid nitrogen tank car;
Step 2): by described vertical, liquid nitrogen is transported to liquid nitrogen conveying supervisor, liquid nitrogen is delivered to liquid nitrogen and directly notes pipe and liquid nitrogen vaporization device by described liquid nitrogen conveying supervisor respectively, described liquid nitrogen is directly noted pipe and liquid nitrogen is injected goaf, is injected into described goaf after liquid nitrogen vaporization is become nitrogen by described liquid nitrogen vaporization device;
Step 3): when the atmospheric pressure in the described goaf that sensor records is greater than predetermined value, the first control valve be arranged on exhaust duct opened by controller, and the air in described goaf is transported to air return pipeline.
Further, described step 2) described in liquid nitrogen vaporization device liquid nitrogen is transported to main gasbag and branch road air bag respectively, nitrogen is injected into described goaf by main note gas nitrogen pipe by described main gasbag, nitrogen is injected into described goaf by branch road note gas nitrogen pipe by described branch road air bag, wherein, described main gasbag and described branch road air bag are separately positioned on upper corner place, goaf.
Further, described step 2) in, liquid nitrogen is transported to described liquid nitrogen conveying supervisor by turning by described vertical.
Beneficial effect of the present invention: by arranging exhaust duct in goaf, when the atmospheric pressure in goaf is greater than predetermined value due to injection liquid nitrogen and nitrogen, open the first control valve, by exhaust duct, the air in goaf is discharged, thus reduce the pressure in goaf, decrease the perfusion resistance of nitrogen, improve nitrogen rate of flooding; And by discharge in time, effectively the atmospheric pressure in goaf is controlled below predetermined value, thus prevent the inert gas in goaf and pernicious gas from escaping in workspace from the crack of goaf upper corner under the effect of high pressure.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these 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:
1, liquid nitrogen tank car; 2, the second control valve; 3, low temperature liquid nitrogen pump; 4, pressure meter; 5, vertical; 6, turning; 7, relief valve; 8, liquid nitrogen conveying supervisor; 9, the first three way cock; 10, liquid nitrogen directly notes pipe; 11, the 3rd control valve; 12, the 4th control valve; 13, liquid nitrogen gasification device; 14, the second three way cock; 15, main gasbag; 16, the 5th control valve; 17, main note gas nitrogen pipe; 18, branch road air bag; 19, the 6th control valve; 20, branch road gas injection nitrogen pipeline; 21, exhaust duct; 22, the first control valve; 23, return air duct.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention; technical scheme in the embodiment of the present invention is clearly and completely described; obviously; described embodiment is only a part of embodiment of the present invention; based on the inventive concept in the present invention; the every other embodiment that those of ordinary skill in the art obtain, all belongs to the scope of protection of the invention.
As shown in Figure 1, according to embodiments of the invention, liquid nitrogen fireproof fire-extinguishing system comprises for storing the liquid nitrogen tank car 1 with transporting liquid nitrogen, liquid nitrogen tank car 1 is connected with pump 3 in turn, vertical 5 and the conveying of the liquid nitrogen under being arranged on mine supervisor 8, liquid nitrogen conveying supervisor 8 is connected to liquid nitrogen by the first three way cock 9 and directly notes pipe 10 and liquid nitrogen vaporization device 13, liquid nitrogen directly notes pipe 10 for liquid nitrogen is injected into goaf, liquid nitrogen vaporization device 13 is for first becoming nitrogen again nitrogen to be injected goaf liquid nitrogen vaporization, and be provided with exhaust duct 21 in described goaf, exhaust duct 21 is connected to the air return pipeline 23 be arranged in workspace, wherein, air return pipeline 23 is existing air return pipelines being arranged on the ventilation system of workspace, air exhaust duct 21 is provided with the first control valve 22, the sensor for monitoring the atmospheric pressure in goaf is also provided with in goaf, sensor and the first control valve 22 are all connected to controller, the signal that controller receiving sensor sends, and according to unblanking or closedown the first control valve 22, particularly, when the atmospheric pressure in the goaf that sensor records is greater than predetermined value, open the first control valve 22, when the atmospheric pressure in the goaf that sensor records is less than predetermined value, close the first control valve 22.
During use, when the atmospheric pressure that sensor detects in goaf is greater than predetermined value due to injection liquid nitrogen and nitrogen, the first control valve be arranged on exhaust duct 21 opened by controller, thus goaf is communicated with air return pipeline 23, air in goaf is discharged, to reduce the pressure in goaf, facilitate the perfusion of nitrogen, improve the rate of flooding of nitrogen; And be communicated with goaf and air return pipeline 23 by arranging exhaust duct 21, pressure in goaf is controlled below predetermined value, thus prevents the inert gas in goaf and pernicious gas from escaping in workspace from the crack of goaf upper corner under the effect of high pressure.
In practical application, pump 3 is low temperature liquid nitrogen pump, and low temperature liquid nitrogen pump can be transported to vertical 5 by from after the low temperature liquid nitrogen heat-insulating pressurizing of liquid nitrogen tank car 1; Liquid nitrogen carries supervisor 8 and between liquid nitrogen tank car 1 and pump 3, the connecting line between pump 3 and vertical 5 all adopts insulating tube, and insulating tube can be adiabatic, reduces the exchange heat between liquid nitrogen and external environment condition, to keep the low temperature of liquid nitrogen, avoid liquid nitrogen gasification.
Preferably, liquid nitrogen vaporization device 13 connects the air inlet port of main gasbag 15 and the air inlet port of branch road air bag 18 respectively by the second three way cock 14, the gas outlet of main gasbag 15 is connected with the main note gas nitrogen pipe 17 being mainly used to nitrogen to be injected into goaf, the gas outlet of branch road air bag 18 is connected with for nitrogen being injected into the branch road note gas nitrogen pipe 20 adopting air, and wherein main gasbag 15 and branch road air bag 18 are all arranged on upper corner place, goaf.Upper corner place, dead zone is stepped on by main gasbag 15 and branch road air bag 18 are arranged on, main gasbag 15 and branch road air bag 18 are when being filled with nitrogen expansion, can be resisted against on the crack at upper corner place, goaf, produce deformable seal crack, thus reduce the gas leakage of stepping on upper corner place, dead zone.
Multiple control valve is provided with in native system, make user can have more actual demand to select to adopt liquid nitrogen or nitrogen extinguishing, or adopt liquid nitrogen and nitrogen extinguishing simultaneously, particularly, the second control valve 2 be provided with between liquid nitrogen tank car 1 and low temperature liquid nitrogen pump 3, liquid nitrogen is directly noted on pipe 10 and is provided with the 3rd control valve 11, the 4th control valve 12 is provided with between first three way cock 9 and liquid nitrogen vaporization device 13, main note gas nitrogen pipe 17 is provided with the 5th control valve 16, branch road note gas nitrogen pipe 20 is provided with the 6th control valve 19.When needs adopt liquid nitrogen extinguishment, open the second control valve 2 and the 3rd control valve 11, liquid nitrogen through liquid nitrogen conveying supervisor 8 from liquid nitrogen tank car 1, is directly noted pipe 10 eventually through liquid nitrogen and liquid nitrogen is filled into goaf; When needs utilize nitrogen extinguishing, open the second control valve 2, the 4th control valve 12, and the 5th control valve 16 and/or the 6th control valve 19, nitrogen through liquid nitrogen conveying supervisor 8 and liquid nitrogen vaporization device 13, is filled into goaf eventually through main note gas nitrogen pipe 17 and/or branch road note gas nitrogen pipe 20 from liquid nitrogen tank car 1 by liquid nitrogen; When needs utilize liquid nitrogen and nitrogen extinguishing simultaneously, then the second control valve the 2, three control valve the 11, four control valve 12, and the 5th control valve 16 and/or the 6th control valve 19 are all held open state.
Preferably, vertical 5 carries supervisor 8 to be connected by the turning 6 being arranged on vertical 5 lower end with liquid nitrogen, described turning 8 comprises the first bend pipe and the second bend pipe, siphunculus is arranged to by first bend pipe, blind pipe is arranged to by second bend pipe, one end of first bend pipe is connected with the openend of the second bend pipe, and one end and the liquid nitrogen of the first bend pipe carry supervisor 8 to be connected.Because liquid nitrogen there will be gasification in transportation, the air pressure in transport pipeline likely can be caused excessive, liquid nitrogen is rebounded, when liquid nitrogen carries the liquid nitrogen generation resilience in supervisor 8, the liquid nitrogen of resilience can enter into the second bend pipe, plays the effect of buffering.
Liquid nitrogen conveying supervisor 10 is provided with relief valve 11, when causing air pressure excessive due to liquid nitrogen gasification in liquid nitrogen conveying supervisor 10, opens relief valve 8, gas unnecessary in pipeline is discharged, reduce internal pressure, liquid nitrogen is carried smoothly.Be provided with pressure gauge 4 between low temperature liquid nitrogen pump 3 and vertical 5, the pressure of the liquid nitrogen entered in vertical 5 can be observed by pressure gauge 4 at any time.
Use a liquid nitrogen fireproof fire-extinguishing method for said system, comprise the following steps:
Step 1): open pump 1 and liquid nitrogen is transported to vertical 5 from liquid nitrogen tank car 1;
Step 2): by described vertical 5, liquid nitrogen is transported to the liquid nitrogen conveying supervisor 8 be arranged in workspace, liquid nitrogen is delivered to liquid nitrogen and directly notes pipe 10 and liquid nitrogen vaporization device 13 by described liquid nitrogen conveying supervisor 8 respectively, described liquid nitrogen is directly noted pipe 10 and liquid nitrogen is injected goaf, is injected into described goaf after liquid nitrogen vaporization is become nitrogen by described liquid nitrogen vaporization device 13;
Step 3): when the atmospheric pressure in the described goaf that sensor records is greater than predetermined value, open the first control valve 22, be arranged on described internal emission of mining space airduct 21 and the air in described goaf is transported to backwind tube 22.
Preferably, liquid nitrogen is transported to main gasbag 15 and branch road air bag 18 by described liquid nitrogen vaporization device 13 respectively, nitrogen is injected into goaf by main note gas nitrogen pipe 14 by described main gasbag 15, nitrogen is injected into goaf by secondary note gas nitrogen pipe 20 by described branch road air bag 18, wherein, described main gasbag 15 and described branch road air bag 18 are separately positioned on goaf upper corner.
Preferably, liquid nitrogen is transported to liquid nitrogen conveying supervisor by turning 6 by vertical 5.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a liquid nitrogen fireproof fire-extinguishing system, it is characterized in that: comprise liquid nitrogen tank car (1), described liquid nitrogen tank car (1) is connected with pump (3) in turn, vertical (5) and liquid nitrogen conveying supervisor (8), described liquid nitrogen conveying supervisor (8) liquid nitrogen be connected to for liquid nitrogen being injected into goaf directly note pipe (10) with for being become by liquid nitrogen vaporization nitrogen to reinject the liquid nitrogen vaporization device (13) in described goaf, and be provided with exhaust duct (21) in described goaf, described exhaust duct (21) connects air return pipeline (23), described exhaust duct (21) is provided with the first control valve (22) for being communicated with or blocking the fluid in pipeline, the sensor for monitoring the atmospheric pressure in described goaf is also provided with in described goaf, sensor and described first control valve (22) are all connected to controller, the signal that described controller sends for receiving described sensor, and according to described unblanking or close described first control valve (22).
2. liquid nitrogen fireproof fire-extinguishing system according to claim 1, it is characterized in that: described liquid nitrogen vaporization device (13) is connected to main gasbag (15) and branch road air bag (18), described main gasbag (15) is connected with the main note gas nitrogen pipe (17) for nitrogen being injected into described goaf, described branch road air bag (18) is connected with branch road note gas nitrogen pipe (20) for nitrogen being injected into described goaf, wherein, described main gasbag (15) and described branch road air bag (18) are all for being arranged on upper corner place, goaf.
3. liquid nitrogen fireproof fire-extinguishing system according to claim 1 and 2, is characterized in that: described vertical (5) is carried by turning (6) and described liquid nitrogen and is responsible for (8) and is connected.
4. liquid nitrogen fireproof fire-extinguishing system according to claim 3, it is characterized in that: described turning (6) comprise the first bend pipe and the second bend pipe, wherein, siphunculus is arranged to by described first bend pipe, blind pipe is arranged to by described second bend pipe, one end of described first bend pipe is connected with the openend of described second bend pipe, and the other end and the described liquid nitrogen of described first bend pipe are carried and be responsible for (8) and be connected.
5. liquid nitrogen fireproof fire-extinguishing system according to claim 3, is characterized in that: the tube connector between described liquid nitrogen tank car (1), described pump (3), described vertical (5) and described liquid nitrogen conveying supervisor (8) are insulating tube.
6. liquid nitrogen fireproof fire-extinguishing system according to claim 3, is characterized in that: described pump (3) is low temperature liquid nitrogen pump (3).
7. liquid nitrogen fireproof fire-extinguishing system according to claim 3, is characterized in that: described liquid nitrogen conveying supervisor (8) is provided with relief valve (7).
8. use a liquid nitrogen fireproof fire-extinguishing method for system described in claim 1, it is characterized in that: comprise the following steps:
Step 1): open pump (1) and liquid nitrogen is transported to vertical (5) from liquid nitrogen tank car (1);
Step 2): by described vertical (5), liquid nitrogen is transported to liquid nitrogen conveying supervisor (8), liquid nitrogen is delivered to liquid nitrogen and directly notes pipe (10) and liquid nitrogen vaporization device (13) by described liquid nitrogen conveying supervisor (8) respectively, described liquid nitrogen is directly noted pipe (10) and liquid nitrogen is injected goaf, is injected into described goaf after liquid nitrogen vaporization is become nitrogen by described liquid nitrogen vaporization device (13);
Step 3): when the atmospheric pressure in the described goaf that sensor records is greater than predetermined value, the first control valve (22) be arranged on exhaust duct (21) opened by controller, the air in described goaf is transported to air return pipeline (22).
9. liquid nitrogen fireproof fire-extinguishing method according to claim 8, it is characterized in that: described step 2) described in liquid nitrogen vaporization device (13) respectively liquid nitrogen is transported to main gasbag (15) and branch road air bag (18), nitrogen is injected into described goaf by main note gas nitrogen pipe (17) by described main gasbag (15), described branch road air bag (17) is noted gas nitrogen pipe (20) by branch road and nitrogen is injected into described goaf, wherein, described main gasbag (15) and described branch road air bag (18) are separately positioned on upper corner place, goaf.
10. liquid nitrogen fireproof fire-extinguishing method according to claim 8, is characterized in that: described step 2) in, liquid nitrogen is transported to described liquid nitrogen conveying supervisor (8) by turning (6) by described vertical (5).
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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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| 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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| Publication Number | Publication Date |
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| CN104775843A true CN104775843A (en) | 2015-07-15 |
| CN104775843B CN104775843B (en) | 2017-07-11 |
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Cited By (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 |
| CN106552386A (en) * | 2016-11-21 | 2017-04-05 | 中国矿业大学 | A kind of tank farm liquid nitrogen self-extinguishing explosion suppression system |
| CN106884672A (en) * | 2017-04-25 | 2017-06-23 | 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 |
| CN108222999A (en) * | 2018-01-26 | 2018-06-29 | 宁夏德大气体开发科技有限公司 | A kind of liquid carbon dioxide cooling fire extinguishing system |
| CN108635714A (en) * | 2018-03-29 | 2018-10-12 | 中国矿业大学 | A kind of 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 |
| CN116427988A (en) * | 2023-05-31 | 2023-07-14 | 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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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
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| CN106884672A (en) * | 2017-04-25 | 2017-06-23 | 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 |
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| 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 |
| CN108222999A (en) * | 2018-01-26 | 2018-06-29 | 宁夏德大气体开发科技有限公司 | A kind of liquid carbon dioxide cooling fire extinguishing system |
| CN108635714A (en) * | 2018-03-29 | 2018-10-12 | 中国矿业大学 | A kind of deep underground fire-fighting 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 |
| CN116427988A (en) * | 2023-05-31 | 2023-07-14 | 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 |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104775843B (en) | 2017-07-11 |
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