CN103174452A - Liquid nitrogen self-pressurization and inhibition fire extinguishing system - Google Patents
Liquid nitrogen self-pressurization and inhibition fire extinguishing system Download PDFInfo
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- CN103174452A CN103174452A CN2013101311592A CN201310131159A CN103174452A CN 103174452 A CN103174452 A CN 103174452A CN 2013101311592 A CN2013101311592 A CN 2013101311592A CN 201310131159 A CN201310131159 A CN 201310131159A CN 103174452 A CN103174452 A CN 103174452A
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Abstract
The invention discloses a liquid nitrogen self-pressurization inhibition fire extinguishing system. The liquid nitrogen self-pressurization and inhibition fire extinguishing system mainly comprises an inhibition fluid container, a liquid nitrogen container, a heat exchanger, an atomizer and liquid nitrogen pipes, wherein the lower part of the liquid nitrogen container is sequentially connected with a first constant-current valve, a cooling branch pipe of the heat exchanger, a first pressure maintaining valve, a first pressure gauge and a gas inlet of a double-phase nozzle through low-temperature pipes; the lower part of the inhibition fluid container is sequentially connected with a second constant-current valve, a heating branch pipe of the heat exchanger, a second pressure maintaining valve, a second pressure gauge and a liquid inlet of the double-phase nozzle through the liquid nitrogen pipes; the upper part of the liquid nitrogen container is connected with the upper part of the inhibition fluid container and the outlet of the cooling branch pipe of the heat exchanger through flexible pipes, and the double-phase nozzle is connected with the rear end of a nitrogen filling pipe. The system has multiple functions of cooling, inerting, inhibiting and atomizing; has high fire prevention and extinguishment efficiencies, does not contain electrical elements and is safe and reliable; is simple in structure, has a small volume, is convenient to move, occupies a small space and can be flexibly moved; and is used for extinguishing fire of underground coal mine gobs or enclosed spaces.
Description
Technical field
The present invention relates to a kind of resistance chemoprevention extinguishing device for anti-fire extinguishing under coal mine.
Background technology
Mine fire causes very large threat to the colliery safety in production.20 century 70s begin, and extensively adopt the nitrogen preventing and extinguishing fire technology both at home and abroad, nitrogen is injected intend treatment region, and the nitrogen molecule disperse extends the coal body oxidation cycle, thereby plays dilution oxygen around broken coal, and the inerting coal body suppresses the effect of burning.Yet nitrogen is loss with the wind easily, can not play the effect of long-term anti-fire extinguishing, and simultaneously, though normal temperature nitrogen can suppress fire, cooling-down effect is limited, and the fire extinguishing cycle is long.The nineties in 20th century, steam fog resistance chemoprevention fire-fighting technique has begun to use in China's coal-mine, as: Chang Cun colliery, Yima, colliery, abundant city, Xuzhou, Yokogawa colliery, is all to a certain degree eliminating disaster hidden-trouble.After utilizing steam fog resistance chemoprevention fire extinguishing system prevent fires to be mixed with the aqueous solution with retardant, take atomizing pump as power, through the atomizing of steam fog generator, to anti-fire extinguishing zone spraying, with resistanceization spontaneous combustion, inerting coal body, inhibition fire.Yet, the thin water smoke of resistanceization is distinguished and admirable as carrier to leak out, enter the regional oxygen of anti-fire extinguishing not controlled, the oxygen that leaks out can not arrive the zone and leave disaster hidden-trouble for can arrive the thin water smoke of resistance, simultaneously, the use of electric elements has affected the safety in the operation and maintenance process under coal mine of steam fog resistance chemoprevention fire extinguishing system.
List of references: plum benevolence, Wang Yueheng. steam fog ignition inhibition for fire prevention technology is in the application [J] in Chang Cun ore deposit, Central Region coal, 1997,96 (3): 42-43.
Summary of the invention
Leave the defective of disaster hidden-trouble and poor stability in order to overcome existing steam fog resistance chemoprevention fire extinguishing system, the invention provides a kind of liquid nitrogen from supercharging resistance chemoprevention fire extinguishing system, it is safe that this system can not stay disaster hidden-trouble, and anti-fire-fighting efficiency is high.
technical scheme of the present invention is: this liquid nitrogen mainly comprises the resistanceization flow container from supercharging resistance chemoprevention fire extinguishing system, liquid nitrogen container, heat exchanger, atomizer, annotate the nitrogen pipe, the liquid nitrogen container bottom connects the first flow stabilizing valve successively by cryotronl, the cold arm of heat exchanger, the first pressure maintaining valve, the first pressure meter and two-phase shower nozzle gas access, resistanceization flow container bottom connects the second flow stabilizing valve successively by resistance liquid pipe, the hot leg pipe of heat exchanger, the second pressure maintaining valve, the second pressure meter and two-phase shower nozzle liquid inlet, liquid nitrogen container top connects the cold arm outlet of resistanceization flow container top and heat exchanger by flexible pipe, two-phase shower nozzle connection notes nitrogen pipe rear end.
Described heat exchanger is built-in with single serpentine heat exchanger tube, and heat exchanger tube is inside and outside two-layer tubular type, and cold arm is put at hot leg pipe inner, and cold arm is Heat Conduction Material, and hot leg pipe is thermal insulation material.
Advantage of the present invention and beneficial effect: utilize the cold of liquid nitrogen that resistance liquid is down to low temperature, and the gas expansion in the liquid nitrogen heat exchange vaporescence is the low temperature nitrogen that forms after power is realized liquid nitrogen vaporization and the low temperature resistanceization liquid atomizing at the two-phase shower nozzle, produce low-temperature atomizing resistanceization liquid, and pass into anti-ly put out a fire that the zone lowers the temperature, inerting and resistance chemoprevention put out a fire.Be applicable to the anti-fire extinguishing of coal mine gob or enclosure space.Have cooling, inerting, resistance, atomizing multiple action, anti-fire-fighting efficiency is high, and does not contain electric elements, and is safe and reliable.Simple in structure, volume is little, conveniently moving takes up space little, can move flexibly.Can continuous operation, and can realize that auto-pressurizing injects low-temperature atomizing resistanceization liquid and carries out fire and prevent and treat and need not the external world energy is provided, have practicality widely.
Description of drawings
Fig. 1 is the overall structure schematic diagram of one embodiment of the present of invention.
Fig. 2 is the structural representation of the heat exchanger in Fig. 1.
In figure: 1. liquid nitrogen container, 2. resistanceization flow container, 3. heat exchanger, 3-1. heat exchanger tube, the cold arm of 3-1-1., 3-1-2. hot leg pipe, 4. two-phase shower nozzle, 5. notes nitrogen pipe, 6. flexible pipe, 7-1. the first flow stabilizing valve, 7-2. the second flow stabilizing valve, 8-1. the first pressure maintaining valve, 8-2. the second pressure maintaining valve, 9-1. the first pressure meter, 9-2. the second pressure meter, 10. cryotronl, 11. resistanceization liquid pipes.
The specific embodiment
In Fig. 1, liquid nitrogen container 1 bottom connects cold arm 3-1-1, the first pressure maintaining valve I 8-1, the first pressure meter 9-1 and two-phase shower nozzle 4 gas accesses of the first flow stabilizing valve 7-1, heat exchanger 3 successively by cryotronl 10, resistanceization flow container 2 bottoms connect hot leg pipe 3-1-2, the second pressure maintaining valve 8-2, the second pressure meter 9-2 and two-phase shower nozzle 4 liquid inlets of the second flow stabilizing valve 7-2, heat exchanger 3 successively by resistance liquid pipe 11, liquid nitrogen container 1 top connects the cold arm 3-1-1 outlet of resistanceization flow container 2 tops and heat exchanger 3 by flexible pipe 6, two-phase shower nozzle 4 connection notes nitrogen pipe 5 rear ends.
In Fig. 2, heat exchanger 3 is built-in with single serpentine heat exchanger tube 3-1, and heat exchanger tube 3-1 is inside and outside two-layer tubular type, and it is inner that cold arm 3-1-1 is arranged in hot leg pipe 3-1-2, and cold arm 3-1-1 is Heat Conduction Material, and hot leg pipe 3-1-2 is thermal insulation material.
Carry out liquid nitrogen when the fire extinguishing of supercharging resistance chemoprevention, regulate the first flow stabilizing valve 7-1 and the second flow stabilizing valve 7-2 reaches predetermined value, the interior liquid nitrogen of liquid nitrogen container 1 enters in the cold arm 3-1-1 of heat exchanger 3 by cryotronl 10, resistanceization flow container 2 internal resistance liquid enter by resistance liquid pipe 11 in the hot leg pipe 3-1-2 of heat exchanger 3, and liquid nitrogen and resistanceization liquid carry out interchange of heat by cold arm 3-1-1 wall Heat Conduction Material in heat exchanger tube 3-1.Because of liquid nitrogen and resistanceization liquid heat exchanger channels single, flow and flowing velocity are as can be known, thereby the heat transfer rate of liquid nitrogen and resistanceization liquid can control, the separating liquid of having avoided conventional heat exchanger multichannel heat exchange to exist is inhomogeneous and cause Local Heat Transfer excessive, causes that resistanceization liquid temp is below the freezing point and the blocking pipeline that freezes (" ice and block up " phenomenon) and the problem that can not work on.
Liquid nitrogen and resistanceization liquid carry out in heat exchanger 3 that in heat exchanging process, liquid nitrogen vaporization is nitrogen, and the increase of volume expansion pressure is opened and regulated the first pressure maintaining valve 8-1 and the second pressure maintaining valve 8-2 and makes the first pressure meter 9-1 and the second pressure meter 9-2 reach predetermined value.At this moment, the low temperature nitrogen and the low temperature resistanceization liquid that obtain through interchange of heat enter two-phase shower nozzle 4 by cryotronl 10 and resistanceization liquid pipe 11 respectively, form low-temperature atomizing resistanceization liquid and pass into the anti-zone of putting out a fire by annotating the nitrogen pipe, realize the fire control.
Claims (2)
1. a liquid nitrogen is from supercharging resistance chemoprevention fire extinguishing system, this liquid nitrogen mainly comprises the resistanceization flow container from supercharging resistance chemoprevention fire extinguishing system, liquid nitrogen container, heat exchanger, atomizer, annotate the nitrogen pipe, it is characterized in that: the liquid nitrogen container bottom connects the first flow stabilizing valve successively by cryotronl, the cold arm of heat exchanger, the first pressure maintaining valve, the first pressure meter and two-phase shower nozzle gas access, resistanceization flow container bottom connects the second flow stabilizing valve successively by resistance liquid pipe, the hot leg pipe of heat exchanger, the second pressure maintaining valve, the second pressure meter and two-phase shower nozzle liquid inlet, liquid nitrogen container top connects the cold arm outlet of resistanceization flow container top and heat exchanger by flexible pipe, two-phase shower nozzle connection notes nitrogen pipe rear end.
2. liquid nitrogen according to claim 1 is from supercharging resistance chemoprevention fire extinguishing system, it is characterized in that: heat exchanger is built-in with single serpentine heat exchanger tube, and heat exchanger tube is inside and outside two-layer tubular type, and cold arm is put at hot leg pipe inner, cold arm is Heat Conduction Material, and hot leg pipe is thermal insulation material.
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| CN201310131159.2A CN103174452B (en) | 2013-04-16 | 2013-04-16 | Liquid nitrogen is from supercharging resistance chemoprevention fire extinguishing system |
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| CN201310131159.2A CN103174452B (en) | 2013-04-16 | 2013-04-16 | Liquid nitrogen is from supercharging resistance chemoprevention fire extinguishing system |
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| CN103174452B CN103174452B (en) | 2015-09-16 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103362534A (en) * | 2013-07-10 | 2013-10-23 | 中国矿业大学 | Nitrogen inhibition water mist preparation system for preventing and treating mine fire and fire prevention and extinguishing method thereof |
| CN105464696A (en) * | 2015-12-25 | 2016-04-06 | 神华集团有限责任公司 | Liquid-nitrogen pressurizing fireproofing and fire extinguishing system and method |
| CN106693237A (en) * | 2017-01-23 | 2017-05-24 | 山东宏达科技集团有限公司 | Snow hail generating and injecting device |
| CN107083987A (en) * | 2017-03-24 | 2017-08-22 | 中国矿业大学(北京) | Prevent and treat the nitrogen resistanceization steam fog preparation method and system of underground goaf spontaneous combustionof coal |
| CN108412536A (en) * | 2018-05-18 | 2018-08-17 | 西安科技大学 | A kind of the deep cooling three-phase inerting slurries generation device and application method of prevention coal spontaneous combustion |
| CN109794014A (en) * | 2019-03-19 | 2019-05-24 | 西安科技大学 | A kind of mining goaf retardant quick break fire extinguishing device and application method |
| RU191850U1 (en) * | 2018-08-28 | 2019-08-26 | Сергей Сергеевич Овсянников | MOBILE FIRE COMPLEX ON THE BASIS OF SOFT RESERVOIRS FOR EXTINGUISHING A FIRE IN DIFFICULT AND REMOTE AREAS |
| CN112879074A (en) * | 2021-04-07 | 2021-06-01 | 安徽理工大学 | Positive and negative pressure inert injection method and system for rapid fire prevention and extinguishing in goaf |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103362534A (en) * | 2013-07-10 | 2013-10-23 | 中国矿业大学 | Nitrogen inhibition water mist preparation system for preventing and treating mine fire and fire prevention and extinguishing method thereof |
| CN103362534B (en) * | 2013-07-10 | 2016-01-06 | 中国矿业大学 | Nitrogen inhibition water mist preparation system for preventing and treating mine fire and fire prevention and extinguishing method thereof |
| CN105464696A (en) * | 2015-12-25 | 2016-04-06 | 神华集团有限责任公司 | Liquid-nitrogen pressurizing fireproofing and fire extinguishing system and method |
| CN105464696B (en) * | 2015-12-25 | 2018-07-06 | 神华集团有限责任公司 | Liquid nitrogen is pressurized fireproof fire-extinguishing system and method |
| CN106693237A (en) * | 2017-01-23 | 2017-05-24 | 山东宏达科技集团有限公司 | Snow hail generating and injecting device |
| CN107083987A (en) * | 2017-03-24 | 2017-08-22 | 中国矿业大学(北京) | Prevent and treat the nitrogen resistanceization steam fog preparation method and system of underground goaf spontaneous combustionof coal |
| CN108412536A (en) * | 2018-05-18 | 2018-08-17 | 西安科技大学 | A kind of the deep cooling three-phase inerting slurries generation device and application method of prevention coal spontaneous combustion |
| CN108412536B (en) * | 2018-05-18 | 2024-04-26 | 西安科技大学 | Cryogenic three-phase inerting slurry generating device for preventing coal spontaneous combustion and using method |
| RU191850U1 (en) * | 2018-08-28 | 2019-08-26 | Сергей Сергеевич Овсянников | MOBILE FIRE COMPLEX ON THE BASIS OF SOFT RESERVOIRS FOR EXTINGUISHING A FIRE IN DIFFICULT AND REMOTE AREAS |
| CN109794014A (en) * | 2019-03-19 | 2019-05-24 | 西安科技大学 | A kind of mining goaf retardant quick break fire extinguishing device and application method |
| CN109794014B (en) * | 2019-03-19 | 2023-04-11 | 西安科技大学 | Mining goaf inhibitor rapid atomization fire prevention and extinguishing device and use method thereof |
| CN112879074A (en) * | 2021-04-07 | 2021-06-01 | 安徽理工大学 | Positive and negative pressure inert injection method and system for rapid fire prevention and extinguishing in goaf |
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