CN104594938A - Mine liquid nitrogen fireproof and fire extinguishing device and use method thereof - Google Patents

Mine liquid nitrogen fireproof and fire extinguishing device and use method thereof Download PDF

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Publication number
CN104594938A
CN104594938A CN201410849329.5A CN201410849329A CN104594938A CN 104594938 A CN104594938 A CN 104594938A CN 201410849329 A CN201410849329 A CN 201410849329A CN 104594938 A CN104594938 A CN 104594938A
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CN
China
Prior art keywords
liquid nitrogen
fire extinguishing
feeding pipe
gasification
main
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CN201410849329.5A
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Chinese (zh)
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CN104594938B (en
Inventor
王俭
周福宝
严永胜
史波波
周光华
钱钧
刘洪刚
占天鹏
Original Assignee
神华集团有限责任公司
神华宁夏煤业集团有限责任公司
中国矿业大学
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Priority to CN201410849329.5A priority Critical patent/CN104594938B/en
Publication of CN104594938A publication Critical patent/CN104594938A/en
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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F5/00Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F3/00Cooling or drying of air
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F5/00Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
    • E21F5/02Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires by wetting or spraying

Abstract

The invention discloses a mine liquid nitrogen fireproof and fire extinguishing device, which comprises a liquid nitrogen cylinder tank car, a main pipeline, a low-temperature liquid pump and a liquid nitrogen gasification device, wherein one end of the main pipeline is connected with the liquid nitrogen cylinder tank car, a first supply pipeline is connected onto the other end of the main pipeline, the input end of the low-temperature liquid pump is connected onto the main pipeline, the output end of the low-temperature liquid pump is also connected with a second supply pipeline, the pipeline main body part of the second supply pipeline is positioned in the liquid nitrogen gasification device, the tail end of the second supply pipeline extends out of the liquid nitrogen gasification device, an exhaust fan used for lowering the temperature of the pipeline main body part is arranged on the liquid nitrogen gasification device, a first control valve is arranged on the first supply pipeline, a second control valve is arranged on the second supply pipeline, and a main control valve is arranged on the main pipeline. The invention also discloses a use method of the mine liquid nitrogen fireproof and fire extinguishing device for fireproof and fire extinguishing purposes.

Description

Mining liquid nitrogen fire extinguishing device and using method thereof

Technical field

The present invention relates to liquid nitrogen preventing and extinguishing fire technology field, particularly relating to a kind of for adopting mining liquid nitrogen fire extinguishing device and the using method thereof of liquid nitrogen extinguishment in colliery.

Background technology

In process of coal mining, along with adopting dark increasing, ground temperature rise, when ground temperature is close to 50 DEG C, the initial oxidation condition of coal can be caused, and unfavorable to heat radiation, high temperature continues not decline, actual spontaneous combustion period will shorten, and temperature does not have sporadic, and this just causes spontaneous fire danger to increase.Because ground temperature is high, need to strengthen face air volume and lower the temperature, but due to the difficulty to control of its skill and the complexity danger of work, increase face air volume, so can increase leaking out of goaf, the hot pressing difference in goaf will increase simultaneously, bring serious potential safety hazard.The freely burning fire of coal can increase again the harmfulness of heat evil.

Control with being difficult to based on existing fire disaster solution complicated operation, liquid nitrogen technology is little based on the volume of liquid nitrogen own, be easy to the feature that stores and transports, give full play to liquid nitrogen datonation-inhibition, suffocate, the multiple effect such as cooling, employing spills liquid nitrogen directly to fire extinguishing district note and liquid nitrogen vaporization is the method that gas nitrogen injects to fire extinguishing district, the process of underground coal mine freely burning fire and exogenous fire can be widely used in, have and can prevent going out and be easy to the feature recovered after putting out a fire.Liquid nitrogen preventing and extinguishing fire technology has the multiple advantages such as vaporization cooling, inerting flame range, displacement pernicious gas.But fire extinguishing device mostly is the form of single fire extinguishing and single vaporization cooling at present, lack a kind of fire extinguishing, cooling integrated apparatus to realize the function of the efficient fire extinguishing of nitrogen and working space cooling, this is also a liquid nitrogen preventing and extinguishing fire technology problem urgently to be resolved hurrily.

Summary of the invention

The object of the invention is to overcome defect of the prior art, a kind of liquid collecting nitrogen fire extinguishing, gas nitrogen fire extinguishing are provided, and the mining liquid nitrogen fire extinguishing device can lowered the temperature to workspace and using method thereof.

Technical solution of the present invention provides a kind of mining liquid nitrogen fire extinguishing device, comprises liquid nitrogen container tank car, main pipeline, cryogenic liquid pump and liquid nitrogen gasification device; Wherein, one end of main pipeline is connected with described liquid nitrogen container tank car, its other end is connected with the first feeding pipe; The input of described cryogenic liquid pump is connected on described main pipeline, described cryogenic liquid delivery side of pump is also connected with the second feeding pipe, the pipeline main body section of described second feeding pipe is in described liquid nitrogen gasification device, and the end of described second feeding pipe stretches out in described liquid nitrogen gasification device; Described liquid nitrogen gasification device is provided with for the exhaust fan to described pipeline main part cooling; Described first feeding pipe is provided with the first control valve, described second feeding pipe is provided with the second control valve, described main pipeline is provided with main control valve.

Further, described pipeline main part is connected to form in turn by multiple U-shaped pipe.

Further, described exhaust fan is by tube connector and the underground pressure air system connectivity treating fire extinguishing district.

Further, described liquid nitrogen gasification device is provided with at least two described exhaust fans that air duct links together, described air duct is connected with described tube connector.

Further, the end of described first feeding pipe has multiple nozzle.

Further, described cryogenic liquid pump and liquid nitrogen gasification device are provided with self-locking support seat.

Further, described first feeding pipe is provided with the first pressure meter; Described second feeding pipe is provided with the second pressure meter between described cryogenic liquid pump and described liquid nitrogen gasification device, and the end and the described liquid nitrogen gasification device that described second feeding pipe are positioned at described second feeding pipe are provided with the 3rd pressure meter.

Technical solution of the present invention also provides a kind of and adopts above-mentioned mining liquid nitrogen fire extinguishing device to carry out the using method of fire extinguishing, and it comprises the steps: step 1: open main control valve; Step 2: if use liquid nitrogen to carry out fire extinguishing, then open the first control valve on the first feeding pipe, liquid nitrogen sprays via described first feeding pipe, to carry out fire extinguishing; If use gas nitrogen to carry out fire extinguishing, then open the second control valve on the second feeding pipe, liquid nitrogen flows in described second feeding pipe from cryogenic liquid pump, and gasify in liquid nitrogen gasification device, liquid nitrogen gasification is gas nitrogen, and meanwhile, exhaust fan is lowered the temperature to pipeline main part, gas nitrogen sprays through the end of described second feeding pipe, to carry out fire extinguishing.

Further, used liquid nitrogen to carry out fire extinguishing if both needed, and needed again to use gas nitrogen to carry out fire extinguishing, be then held open described first control valve and described second control valve.

Adopt technique scheme, there is following beneficial effect:

Mining liquid nitrogen fire extinguishing device provided by the invention and using method thereof, integrate liquid nitrogen extinguishment, the fire extinguishing of gas nitrogen and cooling function.The advantage of the efficient fire extinguishing of liquid nitrogen can be realized, simultaneously because liquid nitrogen gasification becomes gas nitrogen, absorb amount of heat, the function in working space, goaf cooling can be realized, and can adopt gas nitrogen to carry out inertia fire extinguishing, efficiency utilization liquid nitrogen is in the advantage of underground coal mine cooling and fire extinguishing.

Accompanying drawing explanation

Fig. 1 is the structural representation of mining liquid nitrogen fire extinguishing device provided by the invention;

Fig. 2 is the structural representation of pipeline main part;

Fig. 3 is the schematic diagram of U-shaped pipe in the pipeline main part shown in Fig. 2;

Fig. 4 is exhaust fan scheme of installation;

Fig. 5 is exhaust fan and air duct, tube connector connection diagram.

The Reference numeral table of comparisons:

1-liquid nitrogen container tank car; 2-cryogenic liquid pump; 3-liquid nitrogen gasification device;

4-exhaust fan; 41-air duct; 42-tube connector;

43-ventilates ell; 5-main pipeline; 51-main control valve;

52-three way cock; 6-first feeding pipe; 62-first pressure meter;

63-nozzle; 7-second feeding pipe; 71-pipeline main part;

710-U shape is managed; 72-end; 73-second control valve;

74-second pressure meter; 75-the 3rd pressure meter; 8-self-locking support seat;

10-low temperature gasification heat sink; 100-treats fire extinguishing district.

Detailed description of the invention

The specific embodiment of the present invention is further illustrated below in conjunction with accompanying drawing.The identical Reference numeral of wherein identical component represents." liquid nitrogen " that relate in the present invention is liquid nitrogen; " gas nitrogen " is gaseous nitrogen atmosphere, that is to say nitrogen.

As shown in Figure 1, the one that one embodiment of the invention provides is mining liquid nitrogen fire extinguishing device, comprises liquid nitrogen container tank car 1, main pipeline 5, cryogenic liquid pump 2 and liquid nitrogen gasification device 3.

Wherein, one end of main pipeline 5 is connected with liquid nitrogen container tank car 1, its other end is connected with the first feeding pipe 6.

The input of cryogenic liquid pump 2 is connected on main pipeline 5, the output of cryogenic liquid pump 2 is also connected with the second feeding pipe 7, the end 72 that the pipeline main part 71 of the second feeding pipe 7 is positioned at liquid nitrogen gasification device 3, second feeding pipe 7 stretches out in liquid nitrogen gasification device 3.Liquid nitrogen gasification device 3 is provided with the exhaust fan 4 for lowering the temperature to pipeline main part 71.

First feeding pipe 6 is provided with on the first control valve 61, second feeding pipe 7 and is provided with the second control valve 73, main pipeline 5 is provided with main control valve 51.

One provided by the invention is mining liquid nitrogen fire extinguishing device, for liquid nitrogen fire extinguishing, cooling under mine being integrated in one, utilizing, being applicable to fire extinguishing and the cooling work in ore deposit mining face under mine high-temperature process and high-temperature oxydation district.

This is mining, and liquid nitrogen fire extinguishing device comprises liquid nitrogen container tank car 1, main pipeline 5, cryogenic liquid pump 2 and liquid nitrogen gasification device 3.

Liquid nitrogen container tank car 1, for storing liquid nitrogen, and the car of transporting liquid nitrogen, it stores liquid nitrogen by liquid nitrogen container.

Main pipeline 5 is for flowing to the first feeding pipe 6 and/or the second feeding pipe 7 by the liquid nitrogen in liquid nitrogen container tank car 1.

Cryogenic liquid pump 2, for being used for the pump of transporting low temperature liquid (liquid nitrogen), its purposes is, low temperature liquid nitrogen is being transported to the high place of pressure from the place that pressure is low, that is to say after carrying out heat-insulating pressurizing to liquid nitrogen, is beneficial to liquid nitrogen ejection and carries out fire extinguishing.

Cryogenic liquid pump (abbreviation cryogenic pump) is that its purposes is that cryogenic liquid is transported to the high place of pressure from the place that pressure is low at oil, the empty pump dividing and be used for transporting low temperature liquid (as liquid oxygen, liquid nitrogen, liquid argon, liquid hydrocarbon and liquefied natural gas etc.) in chemical plant installations.Along with sky divides the development of technology, cryogenic liquid is widely used and develops.As long as its acting as in air separation plant: for liquid-circulating; Or be pressed into vaporizer from storage tank extracting liquid, give user after vaporization.

Liquid nitrogen gasification device 3 is used for liquid nitrogen to gasify, and makes it change gas nitrogen into, adopts gas nitrogen to carry out inertia fire extinguishing.The benefit of gas nitrogen fire extinguishing be liquid nitrogen in gasification, a large amount of heats can be absorbed, goaf environment temperature can be cooled fast, greatly shorten the time of goaf float coal oxidation, extend the cycle of goaf float coal spontaneous fire simultaneously.

Liquid nitrogen gasification device 3 effect utilizes liquid nitrogen vaporization heat absorption principle, be arranged in low-temperature vaporization sheet in liquid nitrogen gasification device 3 and pipeline main part 710 carries out heat-shift in working space, realize the cooling demand of working space, low-temperature vaporization sheet quantity can carry out increasing the processing temperature controlling work plane according to space requirement.

Liquid nitrogen gasification device 3 is provided with the exhaust fan 4 for lowering the temperature to pipeline main part 71.Particularly, exhaust fan 4 is arranged on the outer cover of low temperature gasification sheet, utilizes the compressed-air system of the down-hole for the treatment of in fire extinguishing district 100 to provide power, accelerates the exchange heat in high-temperature operation space, down-hole, realize zero power consumption non-environmental-pollution radiating and cooling.

One end of main pipeline 5 is connected with liquid nitrogen container tank car 1, and its other end is connected with the first feeding pipe 6.The input of cryogenic liquid pump 2 is connected on main pipeline 5, and the output of cryogenic liquid pump 2 is also connected with the second feeding pipe 7.Thus by main pipeline 5, liquid nitrogen can be flowed to the first feeding pipe 6 and/or the second feeding pipe 7.Open and close to control main pipeline, main pipeline 5 is provided with main control valve 51.

For the ease of connecting, the input of main pipeline 5, first feeding pipe 6, cryogenic liquid pump 2 can be connected by three way cock 52.Main control valve 51 is arranged on the upstream of three way cock 52, to realize overall control.

First feeding pipe 6 arranges the first control valve 61, and open and close to control it, the end of the first feeding pipe 6 is preferably arranged in be treated in fire extinguishing district 100.

When needs liquid nitrogen fire extinguishing, open main control valve 51 and the first control valve 61, liquid nitrogen can be delivered to and treat, in fire extinguishing district 100, to carry out fire extinguishing.

Second feeding pipe 7 arranges the second control valve 73, opens and closes to control it.The pipeline main part 71 of the second feeding pipe 7 is positioned at liquid nitrogen gasification device 3.Under the effect of liquid nitrogen gasification device 3, the liquid nitrogen gasification in pipeline main part 71 is gas nitrogen.Exhaust fan 4 can also be lowered the temperature to pipeline main part 71 simultaneously.Gas nitrogen (nitrogen) after vaporization enters through end 72 and treats that fire extinguishing district 100 (high-temperature oxydation district, goaf) carries out inerting fire extinguishing.

Above-mentioned cryogenic liquid pump 2, liquid nitrogen gasification device 3 and exhaust fan 4 constitute for carrying out the low temperature gasification heat sink gasified of lowering the temperature to liquid nitrogen.

Thus, mining liquid nitrogen fire extinguishing device provided by the invention, liquid nitrogen fire extinguishing, gas nitrogen fire extinguishing and cooling function are integrated in one, have both can be used alone liquid nitrogen fire extinguishing, also can use gas nitrogen fire extinguishing, gas nitrogen and liquid nitrogen can also carry out fire extinguishing simultaneously, can meet the different needs, effectively improve fire extinguishing and the cooling efficiency of liquid nitrogen, realize intensive high efficiency note nitrogen, but also be conducive to the air quality improving down-hole local environment, there is practicality widely.

Preferably, as Figure 1-3, pipeline main part 71 is connected to form in turn by multiple U-shaped pipe 710.Multiple U-shaped pipe 710 connects successively, is arranged in liquid nitrogen gasification device 3, adds the stroke of liquid nitrogen in liquid nitrogen gasification device 3, improves gasification result, and is beneficial to reduces environment temperature in gasification.

Preferably, as shown in Figure 1, exhaust fan 4 by tube connector 42 with treat that the underground pressure air system (not shown) in fire extinguishing district 100 is communicated with.Utilize underground pressure air system to provide power, improve the heat exchange coefficient of surrounding environment and liquid nitrogen.Because the high-temperature gas in well is discharged by exhaust fan 4, carry out exchange heat with liquid nitrogen, greatly reduce the temperature of down-hole surrounding environment, shorten the fire extinguishing cycle.

Thus, this exhaust fan 4 has the following two kinds function:

When exhaust fan 4 is not with when the underground pressure air system connectivity in fire extinguishing district 100, temperature required when its wind of discharging is used for lowering the temperature or remain on liquid nitrogen gasification to the liquid nitrogen in pipeline main part 71.

When exhaust fan 4 is with when the underground pressure air system connectivity in fire extinguishing district 100, down-hole high-temperature gas is discharged by it, carries out exchange heat, greatly reduce the temperature of peripheral circular or subsurface environment with the liquid nitrogen in pipeline main part 71.

Preferably, as illustrated in figures 4-5, liquid nitrogen gasification device 3 is provided with at least two exhaust fans 4 that air duct 41 links together, air duct 41 is connected with tube connector 42.

By arranging at least two exhaust fans 4 or multiple exhaust fan 4, improve efficiency or the cooling efficiency of exchange heat.

These two exhaust fans 4 or multiple exhaust fan 4 are linked together by air duct 41, and air duct 41 is connected with tube connector 42 by ventilation ell again.Thus the wind that can discharge in all exhaust fans 4 is all supplied by tube connector 42.

When tube connector 42 is with when the underground pressure air system connectivity in fire extinguishing district 100, down-hole high-temperature gas is supplied each exhaust fan 4 and discharges by tube connector 42, improves between liquid nitrogen and environment and carries out exchange heat, greatly reduce the temperature of peripheral circular or subsurface environment.

Preferably, as shown in Figure 1, the end of the first feeding pipe 6 has multiple nozzle 63, and multiple nozzle 63 is arranged towards different directions, for treating to pour into liquid nitrogen towards different directions in fire extinguishing district 100, improves fire extinguishing effect.

Preferably, as shown in Figure 1, cryogenic liquid pump 2 and liquid nitrogen gasification device 3 are provided with self-locking support seat 8.This self-locking support seat 8 can move, and is convenient to as required cryogenic liquid pump 2 and liquid nitrogen gasification device 3 be moved to desired location, such as, treat the down-hole in fire extinguishing district 100, and can realize self-locking, avoid slip to cause pipeline to rupture.

Preferably, as shown in Figure 1, conveniently control, the first feeding pipe 6 is provided with the first pressure meter 62; Second feeding pipe 7 is provided with the second pressure meter 74 between cryogenic liquid pump 2 and liquid nitrogen gasification device 3, and the end 72 that the second feeding pipe 7 is positioned at the second feeding pipe 7 is provided with the 3rd pressure meter 75 with liquid nitrogen gasification device 3.Be convenient to user and observed pressure in the first feeding pipe 6 by the first pressure meter 62, whether meet pressure needed for liquid nitrogen tubing string.Also be convenient to user by the pressure differential between observation the 3rd pressure meter 75 and the second pressure meter 74, whether meet the pressure needed for gas nitrogen fire extinguishing.

To sum up, mining liquid nitrogen fire extinguishing device provided by the invention, integrates liquid nitrogen extinguishment, the fire extinguishing of gas nitrogen and cooling function.The advantage of the efficient fire extinguishing of liquid nitrogen can be realized, simultaneously because liquid nitrogen gasification becomes gas nitrogen, absorb amount of heat, the function in working space, goaf cooling can be realized, and can adopt gas nitrogen to carry out inertia fire extinguishing, efficiency utilization liquid nitrogen is in the advantage of underground coal mine cooling and fire extinguishing.

One embodiment of the invention also provides a kind of and adopts above-mentioned mining liquid nitrogen fire extinguishing device to carry out the using method of fire extinguishing, and it comprises the steps: step 1: open main control valve 51.

Step 2: if use liquid nitrogen to carry out fire extinguishing, then open the first control valve 61 on the first feeding pipe 6, liquid nitrogen sprays via the first feeding pipe 6, to carry out fire extinguishing;

If use gas nitrogen to carry out fire extinguishing, then open the second control valve 73 on the second feeding pipe 7, liquid nitrogen flows in the second feeding pipe 7 from cryogenic liquid pump 2, and gasify in liquid nitrogen gasification device 3, liquid nitrogen gasification is gas nitrogen, and meanwhile, exhaust fan 4 pairs of pipeline main parts 71 are lowered the temperature, gas nitrogen sprays through the end 72 of the second feeding pipe 7, to carry out fire extinguishing.

Preferably, used liquid nitrogen to carry out fire extinguishing if both needed, and needed again to use gas nitrogen to carry out fire extinguishing, be then held open the first control valve 61 and the second control valve 73.Make the first feeding pipe 6 spray liquid nitrogen, the second feeding pipe ejection gas nitrogen, carries out fire extinguishing, improves fire-fighting efficiency, meet different demands.

As required, above-mentioned each technical scheme can be combined, to reach best-of-breed technology effect.

Above-described is only principle of the present invention and preferred embodiment.It should be pointed out that for the person of ordinary skill of the art, on the basis of the principle of the invention, other modification some can also be made, also should be considered as protection scope of the present invention.

Claims (9)

1. a mining liquid nitrogen fire extinguishing device, is characterized in that, comprises liquid nitrogen container tank car, main pipeline, cryogenic liquid pump and liquid nitrogen gasification device;
Wherein, one end of main pipeline is connected with described liquid nitrogen container tank car, its other end is connected with the first feeding pipe;
The input of described cryogenic liquid pump is connected on described main pipeline, described cryogenic liquid delivery side of pump is also connected with the second feeding pipe, the pipeline main body section of described second feeding pipe is in described liquid nitrogen gasification device, and the end of described second feeding pipe stretches out in described liquid nitrogen gasification device;
Described liquid nitrogen gasification device is provided with for the exhaust fan to described pipeline main part cooling;
Described first feeding pipe is provided with the first control valve, described second feeding pipe is provided with the second control valve, described main pipeline is provided with main control valve.
2. one according to claim 1 mining liquid nitrogen fire extinguishing device, is characterized in that, described pipeline main part is connected to form in turn by multiple U-shaped pipe.
3. one according to claim 1 mining liquid nitrogen fire extinguishing device, is characterized in that, described exhaust fan is by tube connector and the underground pressure air system connectivity treating fire extinguishing district.
4. one according to claim 3 mining liquid nitrogen fire extinguishing device, is characterized in that, described liquid nitrogen gasification device is provided with at least two described exhaust fans that air duct links together, described air duct is connected with described tube connector.
5. one according to claim 1 mining liquid nitrogen fire extinguishing device, is characterized in that, the end of described first feeding pipe has multiple nozzle.
6. one according to claim 1 mining liquid nitrogen fire extinguishing device, is characterized in that, described cryogenic liquid pump and liquid nitrogen gasification device are provided with self-locking support seat.
7. one according to claim 1 mining liquid nitrogen fire extinguishing device, is characterized in that, described first feeding pipe is provided with the first pressure meter;
Described second feeding pipe is provided with the second pressure meter between described cryogenic liquid pump and described liquid nitrogen gasification device, and the end and the described liquid nitrogen gasification device that described second feeding pipe are positioned at described second feeding pipe are provided with the 3rd pressure meter.
8. adopt mining liquid nitrogen fire extinguishing device according to claim 1 to carry out a using method for fire extinguishing, it comprises the steps:
Step 1: open main control valve;
Step 2: if use liquid nitrogen to carry out fire extinguishing, then open the first control valve on the first feeding pipe, liquid nitrogen sprays via described first feeding pipe, to carry out fire extinguishing;
If use gas nitrogen to carry out fire extinguishing, then open the second control valve on the second feeding pipe, liquid nitrogen flows in described second feeding pipe from cryogenic liquid pump, and gasify in liquid nitrogen gasification device, liquid nitrogen gasification is gas nitrogen, and meanwhile, exhaust fan is lowered the temperature to pipeline main part, gas nitrogen sprays through the end of described second feeding pipe, to carry out fire extinguishing.
9. using method according to claim 8, is characterized in that, uses liquid nitrogen to carry out fire extinguishing if both needed, and needs again to use gas nitrogen to carry out fire extinguishing, is then held open described first control valve and described second control valve.
CN201410849329.5A 2014-12-29 2014-12-29 Mine liquid nitrogen fireproof and fire extinguishing device and use method thereof CN104594938B (en)

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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
CN106247169A (en) * 2016-09-08 2016-12-21 神华宁夏煤业集团有限责任公司 A kind of mining liquid carbon dioxide pipeline transporter and carrying method
CN106640172A (en) * 2016-11-16 2017-05-10 辽阳正阳机械设备制造有限公司 Mine downhole heat damage treatment and fire prevention and firefighting integral device
CN107620862A (en) * 2017-07-31 2018-01-23 新兴能源装备股份有限公司 A kind of blowing pipeline liquid nitrogen gasification device

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CN201921357U (en) * 2011-01-28 2011-08-10 李景阳 Low-temperature inert liquid-gas fire-fighting system for mine
CN201921356U (en) * 2011-01-28 2011-08-10 李景阳 Low-temperature inert liquid and inert gas fire preventing and extinguishing system
CN202250150U (en) * 2011-09-21 2012-05-30 李景阳 Liquid nitrogen cooling, fireproofing and fire-extinguishing system
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Cited By (5)

* Cited by examiner, † Cited by third party
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
CN106247169A (en) * 2016-09-08 2016-12-21 神华宁夏煤业集团有限责任公司 A kind of mining liquid carbon dioxide pipeline transporter and carrying method
CN106247169B (en) * 2016-09-08 2018-05-18 神华宁夏煤业集团有限责任公司 A kind of mining liquid carbon dioxide pipeline transporter and carrying method
CN106640172A (en) * 2016-11-16 2017-05-10 辽阳正阳机械设备制造有限公司 Mine downhole heat damage treatment and fire prevention and firefighting integral device
CN107620862A (en) * 2017-07-31 2018-01-23 新兴能源装备股份有限公司 A kind of blowing pipeline liquid nitrogen gasification device

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