CN104594938B - 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 PDFInfo
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- CN104594938B CN104594938B CN201410849329.5A CN201410849329A CN104594938B CN 104594938 B CN104594938 B CN 104594938B CN 201410849329 A CN201410849329 A CN 201410849329A CN 104594938 B CN104594938 B CN 104594938B
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- liquid nitrogen
- fire extinguishing
- feeding pipe
- pipeline
- control valve
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21F5/02—Means 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
Technical field
The present invention relates to liquid nitrogen preventing and extinguishing fire technology field, more particularly, to a kind of for adopting the mining of liquid nitrogen extinguishment in colliery
Liquid nitrogen fire extinguishing device and its using method.
Background technology
In process of coal mining, with adopting deep increasing, ground temperature rise, ground temperature close to 50 DEG C when, the initial stage of coal can be caused
Oxidizing condition, and unfavorable to radiating, high temperature continues not decline, and actual spontaneous combustion period will shorten, and temperature does not have sporadic, and this is just
Lead to the dangerous increase of spontaneous fire.Because ground temperature is high, need to increase face air volume to lower the temperature, but the difficulty due to its skill
Controlling and work complicated dangerous, increase face air volume, then can increase leaking out of goaf, simultaneously goaf
Hot pressing difference will increase, and bring serious potential safety hazard.The freely burning fire of coal can increase the harmfulness of heat evil again.
Based on existing fire disaster solution complex operation and being difficult to control to, liquid nitrogen technology is based on liquid nitrogen volume itself
Little, be easy to the feature that stores and transports, give full play to that liquid nitrogen is datonation-inhibition, multiple effects such as suffocate, cool down, spilt using directly noting to fire extinguishing area
Liquid nitrogen and liquid nitrogen vaporization are the method that gas nitrogen injects to fire extinguishing area, can be widely applied to underground coal mine freely burning fire and external cause
The process of fire, is easy to after having the characteristics that can prevent can going out and putting out a fire recover.Liquid nitrogen preventing and extinguishing fire technology has vaporization cooling, inerting
Multiple advantages such as flame range, displacement pernicious gas.But current fire extinguishing device mostly single fire extinguishing and single vaporization are lowered the temperature
Form, the function that a kind of fire extinguishing of shortage, cooling integrated apparatus are lowered the temperature the efficient fire extinguishing and working space to realize nitrogen,
This is also a liquid nitrogen preventing and extinguishing fire technology problem urgently to be resolved hurrily.
Content of the invention
It is an object of the invention to overcoming defect of the prior art, provide a kind of collection liquid nitrogen fire extinguishing, gas nitrogen fire extinguishing,
And the mining liquid nitrogen fire extinguishing device that workspace can be lowered the temperature and its using method.
Technical solution of the present invention provides a kind of mining liquid nitrogen fire extinguishing device, including liquid nitrogen tank vehicles, main pipeline, Low Temperature Liquid
Body pump and liquid nitrogen gasification device；Wherein, one end of main pipeline is connected with described liquid nitrogen tank vehicles, and its other end is connected with first
Feeding pipe；The input of described cryogenic liquid pump is connected on described main pipeline, and the output end of described cryogenic liquid pump also connects
Be connected to the second feeding pipe, the pipeline main body section of described second feeding pipe in described liquid nitrogen gasification device, described second
The end of feeding pipe stretches out in described liquid nitrogen gasification device；It is provided with for described pipeline master on described liquid nitrogen gasification device
The ventilating fan of body cooling；First control valve is provided with described first feeding pipe, described second feeding pipe is provided with
Second control valve, described main pipeline is provided with main control valve.
Further, described pipeline main part is sequentially connected with by multiple U-tube and is formed.
Further, described ventilating fan passes through connecting tube and the underground pressure air system connectivity treating fire extinguishing area.
Further, described in described liquid nitrogen gasification device is provided with breather line links together at least two
Ventilating fan, described breather line is connected with described connecting tube.
Further, the end of described first feeding pipe has multiple nozzles.
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 first pressure table；Institute is located on described second feeding pipe
State and between cryogenic liquid pump and described liquid nitrogen gasification device, be provided with second pressure table, described second feeding pipe is located at described
The end of the second feeding pipe and described liquid nitrogen gasification device are provided with the 3rd pressure gauge.
Technical solution of the present invention also provides a kind of user carrying out fire extinguishing using above-mentioned mining liquid nitrogen fire extinguishing device
Method, it comprises the steps：Step 1：Open main control valve；Step 2：If carrying out fire extinguishing using liquid nitrogen, open the first confession
To the first control valve on pipeline, liquid nitrogen sprays via described first feeding pipe, to carry out fire extinguishing；If being carried out using gas nitrogen
Fire extinguishing, then open the second control valve on the second feeding pipe, and liquid nitrogen flows into described second feeding pipe from cryogenic liquid pump
Interior, and gasify in liquid nitrogen gasification device, liquid nitrogen gasification is gas nitrogen, and meanwhile, ventilating fan is lowered the temperature to pipeline main part, gas nitrogen
End through described second feeding pipe sprays, to carry out fire extinguishing.
Further, if both having needed to carry out fire extinguishing using liquid nitrogen, need to carry out fire extinguishing using gas nitrogen again, then keep opening
Open described first control valve and described second control valve.
Using technique scheme, have the advantages that：
Mining liquid nitrogen fire extinguishing device and its using method that the present invention provides, collection liquid nitrogen extinguishment, the fire extinguishing of gas nitrogen and cooling
Function is in one.The advantage of the efficient fire extinguishing of achievable liquid nitrogen, simultaneously because liquid nitrogen gasification becomes gas nitrogen, absorbs amount of heat,
It is capable of the function in working space, goaf cooling, and inertia fire extinguishing, efficient utilization liquid nitrogen can be carried out using gas nitrogen
Advantage in underground coal mine cooling and fire extinguishing.
Brief description
The structural representation of the mining liquid nitrogen fire extinguishing device that Fig. 1 provides for the present invention；
Fig. 2 is the structural representation of pipeline main part；
Fig. 3 is the schematic diagram of U-tube in the pipeline main part shown in Fig. 2；
Fig. 4 is ventilating fan scheme of installation；
Fig. 5 is ventilating fan and breather line, connecting tube connection diagram.
The reference table of comparisons：
1- liquid nitrogen tank vehicles；2- cryogenic liquid pump；3- liquid nitrogen gasification device；
4- ventilating fan；41- breather line；42- connecting tube；
43- ventilation ell；5- main pipeline；51- main control valve；
52- triple valve；6- first feeding pipe；62- first pressure table；
63- nozzle；7- second feeding pipe；71- pipeline main part；
710-U shape pipe；72- end；73- second control valve；
74- second pressure table；75- the 3rd pressure gauge；8- self-locking support seat；
10- low temperature gasification heat sink；100- treats fire extinguishing area.
Specific embodiment
To further illustrate the specific embodiment of the present invention below in conjunction with the accompanying drawings.Wherein identical parts identical
Reference represents." liquid nitrogen " being related in the present invention is liquid nitrogen；" gas nitrogen " is gaseous nitrogen atmosphere, that is to say nitrogen.
As shown in figure 1, one embodiment of the invention provide a kind of mining liquid nitrogen fire extinguishing device, including liquid nitrogen tank vehicles 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 tank vehicles 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 end of cryogenic liquid pump 2 is also associated with the second confession
To pipeline 7, the pipeline main part 71 of the second feeding pipe 7 is located in liquid nitrogen gasification device 3, the end 72 of the second feeding pipe 7
Stretch out in liquid nitrogen gasification device 3.Ventilating fan 4 for lowering the temperature to pipeline main part 71 is provided with liquid nitrogen gasification device 3.
First control valve 61 is provided with the first feeding pipe 6, the second feeding pipe 7 is provided with the second control valve 73,
Main control valve 51 is provided with main pipeline 5.
A kind of mining liquid nitrogen fire extinguishing device that the present invention provides, for combining in one by liquid nitrogen fire extinguishing, cooling under mine
Body, carry out using it is adaptable to the fire extinguishing in ore deposit mining face under mine high-temperature process and high-temperature oxydation area and cooling work.
This is mining, and liquid nitrogen fire extinguishing device includes liquid nitrogen tank vehicles 1, main pipeline 5, cryogenic liquid pump 2 and liquid nitrogen gasification device
3.
Liquid nitrogen tank vehicles 1, for storing liquid nitrogen, and the car of transporting liquid nitrogen, it stores liquid nitrogen by liquid nitrogen container.
Main pipeline 5 is used for for the liquid nitrogen in liquid nitrogen tank vehicles 1 being conveyed to the first feeding pipe 6 and/or the second feeding pipe
7.
Cryogenic liquid pump 2, is the pump for transporting low temperature liquid (liquid nitrogen), and its purposes is, by low temperature liquid nitrogen from pressure
The low place of power is transported to the high place of pressure, that is to say after carrying out heat-insulating pressurizing to liquid nitrogen, sprays beneficial to liquid nitrogen and is prevented
Fire extinguishing.
Cryogenic liquid pump (abbreviation cryogenic pump) is (as liquid in oil, space division and chemical plant installations for transporting low temperature liquid
Oxygen, liquid nitrogen, liquid argon, liquid hydrocarbon and liquefied natural gas etc.) pump, its purposes be by cryogenic liquid from pressure low place conveying
To the high place of pressure.With the development of spatial division technology, cryogenic liquid is widely used and develops.It is in air separation plant
As long as in act as：For liquid circulation；Or from storage tank extraction liquid and it is pressed into vaporizer, give use after vaporization
Family.
Liquid nitrogen gasification device 3 is used for liquid nitrogen is gasified so as to be changed into gas nitrogen, carries out inertia using gas nitrogen and prevents going out
Fire.The benefit of gas nitrogen fire extinguishing in gasification, can absorb substantial amounts of heat, can quickly cool down goaf environment temperature for liquid nitrogen
Degree, greatly shortens the time of goaf float coal oxidation, extends the cycle of goaf float coal spontaneous fire simultaneously.
Liquid nitrogen gasification device 3 effect is using liquid nitrogen vaporization heat absorption principle, is arranged in the low temperature vapour in liquid nitrogen gasification device 3
Change piece and swap heat in working space with pipeline main part 710, realize the cooling demand of working space, low-temperature vaporization piece
Quantity can carry out increasing controlling the processing temperature of working face according to space requirement.
Ventilating fan 4 for lowering the temperature to pipeline main part 71 is provided with liquid nitrogen gasification device 3.Specifically, ventilating fan 4 is pacified
It is contained on the outer cover of low temperature gasification piece, the compressed-air system using the down-hole treated in fire extinguishing area 100 provides power, accelerates down-hole high
The heat exchange of warm working space, realizes zero power consumption non-environmental-pollution radiating and cooling.
One end of main pipeline 5 is connected with liquid nitrogen tank vehicles 1, and its other end is connected with the first feeding pipe 6.Cryogenic liquid pump
2 input is connected on main pipeline 5, and the output end of cryogenic liquid pump 2 is also associated with the second feeding pipe 7.Such that it is able to logical
Cross main pipeline 5 and liquid nitrogen is conveyed to the first feeding pipe 6 and/or the second feeding pipe 7.In order to control main pipeline to open and close
Close, main control valve 51 is provided with main pipeline 5.
For the ease of connecting, the input of main pipeline 5, the first feeding pipe 6, cryogenic liquid pump 2 can be passed through triple valve
52 connections.Main control valve 51 is arranged on the upstream of triple valve 52, to realize overall control.
First control valve 61 is arranged on the first feeding pipe 6, to control its open and close, the first feeding pipe 6
End is preferably arranged in treats in fire extinguishing area 100.
When needing liquid nitrogen fire extinguishing, open main control valve 51 and the first control valve 61, you can liquid nitrogen is delivered to and waits to prevent
In attack area 100, carry out fire extinguishing.
Second control valve 73 is arranged on the second feeding pipe 7, to control its open and close.Second feeding pipe 7
Pipeline main part 71 is located in liquid nitrogen gasification device 3.Liquid nitrogen in the presence of liquid nitrogen gasification device 3, in pipeline main part 71
Gasify as gas nitrogen.Ventilating fan 4 can also be lowered the temperature to pipeline main part 71 simultaneously.Gas nitrogen (nitrogen) after vaporization is through end 72
Enter and treat that fire extinguishing area 100 (goaf high-temperature oxydation area) carries out inerting fire extinguishing.
Above-mentioned cryogenic liquid pump 2, liquid nitrogen gasification device 3 and ventilating fan 4 constitute for liquid nitrogen is carried out with gasification of lowering the temperature
Low temperature gasification heat sink.
Thus, the mining liquid nitrogen fire extinguishing device that the present invention provides, by liquid nitrogen fire extinguishing, gas nitrogen fire extinguishing and cooling function
It is integrated in one, both can be used alone liquid nitrogen fire extinguishing, it is possible to use gas nitrogen fire extinguishing, can also gas nitrogen and liquid nitrogen enter simultaneously
Row fire extinguishing, disclosure satisfy that different demands, effectively improves fire extinguishing and the cooling efficiency of liquid nitrogen, realizes intensive high efficiency note
Nitrogen, and also help the air quality improving down-hole local environment, there is wide applicability.
It is preferred that as Figure 1-3, pipeline main part 71 is sequentially connected with by multiple U-tube 710 and is formed.Multiple U-tube
710 are sequentially connected, and are arranged in liquid nitrogen gasification device 3, increased stroke in liquid nitrogen gasification device 3 for the liquid nitrogen, improve gasification
Effect, and beneficial to reduction environment temperature in gasification.
It is preferred that as shown in figure 1, ventilating fan 4 passes through connecting tube 42 and the underground pressure air system (figure treating fire extinguishing area 100
Not shown in) connection.There is provided power using underground pressure air system, improve the heat exchange coefficient of surrounding environment and liquid nitrogen.Due to
High-temperature gas in well is discharged by ventilating fan 4, carries out heat exchange with liquid nitrogen, greatly reduces the temperature of down-hole surrounding environment
Degree, shortens the fire extinguishing cycle.
Thus, this ventilating fan 4 has the following two kinds function：
When ventilating fan 4 is not used for pipeline with the wind that during whne the underground pressure air system connectivity in fire extinguishing area 100, it is discharged
Liquid nitrogen in main part 71 is lowered the temperature or is maintained at temperature required during liquid nitrogen gasification.
When ventilating fan 4 is with during whne the underground pressure air system connectivity in fire extinguishing area 100, down-hole high-temperature gas is discharged by it, with
Liquid nitrogen in pipeline main part 71 carries out heat exchange, greatly reduces the temperature of peripheral circular or subsurface environment.
It is preferred that as illustrated in figures 4-5, liquid nitrogen gasification device 3 is provided with breather line 41 link together to
Few two ventilating fans 4, breather line 41 is connected with connecting tube 42.
By arranging at least two ventilating fans 4 or multiple ventilating fan 4, improve efficiency or the cooling efficiency of heat exchange.
This two ventilating fans 4 or multiple ventilating fan 4 are linked together by breather line 41, and breather line 41 is further through logical
Gas ell is connected with connecting tube 42.Thus the wind that can discharge in all ventilating fans 4 is all supplied by connecting tube 42.
When connecting tube 42 is with during whne the underground pressure air system connectivity in fire extinguishing area 100, connecting tube 42 is by down-hole high-temperature gas
Supply each ventilating fan 4 to discharge, improve and carry out heat exchange between liquid nitrogen and environment, greatly reduce peripheral circular or down-hole
The temperature of environment.
It is preferred that as shown in figure 1, the end of the first feeding pipe 6 has multiple nozzles 63, multiple nozzle 63 is towards difference
Direction arrangement, for treating to irrigate liquid nitrogen, raising fire extinguishing effect towards different direction in the fire extinguishing area 100 in.
It is preferred that as shown in figure 1, being provided with self-locking support seat 8 on cryogenic liquid pump 2 and liquid nitrogen gasification device 3.Should be certainly
Lock support base 8 can move, and is easy to mobile to cryogenic liquid pump 2 and liquid nitrogen gasification device 3 as needed to desired location, for example
Treat the down-hole in fire extinguishing area 100 it is possible to realize self-locking, it is to avoid slide and cause pipeline to rupture.
It is preferred that as shown in figure 1, controlling for convenience, the first feeding pipe 6 is provided with first pressure table 62；?
It is located on second feeding pipe 7 and between cryogenic liquid pump 2 and liquid nitrogen gasification device 3, is provided with second pressure table 74, in the second confession
To the end 72 that the second feeding pipe 7 is located on pipeline 7, liquid nitrogen gasification device 3 is provided with the 3rd pressure gauge 75.It is easy to use
Person observes the pressure in the first feeding pipe 6 by first pressure table 62, if meet liquid nitrogen tubing string desirable pressure.Also allow for making
User passes through to observe the pressure differential between the 3rd pressure gauge 75 and second pressure table 74, if meet the pressure needed for gas nitrogen fire extinguishing
Power.
To sum up, the mining liquid nitrogen fire extinguishing device that the present invention provides, collects liquid nitrogen extinguishment, the fire extinguishing of gas nitrogen and cooling function in one
Body.The advantage of the efficient fire extinguishing of achievable liquid nitrogen, simultaneously because liquid nitrogen gasification becomes gas nitrogen, absorbs amount of heat, is capable of
In the function of working space, goaf cooling, and inertia fire extinguishing can be carried out using gas nitrogen, efficient utilization liquid nitrogen is in coal mine
Decline the advantage of gentle fire extinguishing.
One embodiment of the invention also provides a kind of user carrying out fire extinguishing using above-mentioned mining liquid nitrogen fire extinguishing device
Method, it comprises the steps：Step 1：Open main control valve 51.
Step 2：If carrying out fire extinguishing using liquid nitrogen, open the first control valve 61 on the first feeding pipe 6, liquid nitrogen warp
Sprayed by the first feeding pipe 6, to carry out fire extinguishing；
If carrying out fire extinguishing using gas nitrogen, open the second control valve 73 on the second feeding pipe 7, liquid nitrogen is from Low Temperature Liquid
Body pump 2 flows in the second feeding pipe 7, and gasifies in liquid nitrogen gasification device 3, and liquid nitrogen gasification is gas nitrogen, meanwhile, ventilating fan 4
Pipeline main part 71 is lowered the temperature, the end 72 through the second feeding pipe 7 for the gas nitrogen sprays, to carry out fire extinguishing.
If it is preferred that both having needed to carry out fire extinguishing using liquid nitrogen, needing to carry out fire extinguishing using gas nitrogen, then keeping it turned on again
First control valve 61 and the second control valve 73.The first feeding pipe 6 is made to spray liquid nitrogen, the second feeding pipe sprays gas nitrogen, carries out
Fire extinguishing, improves fire-fighting efficiency, meets different demands.
As needed, above-mentioned each technical scheme can be combined, to reach best-of-breed technology effect.
Above-described be only the present invention principle and preferred embodiment.It should be pointed out that the common skill for this area
For art personnel, on the basis of the principle of the invention, some other modifications can also be made, also should be regarded as the protection model of the present invention
Enclose.
Claims (9)
1. a kind of mining liquid nitrogen fire extinguishing device is it is characterised in that include liquid nitrogen tank vehicles, main pipeline, cryogenic liquid pump and liquid
Nitrogen gasifying device；
Wherein, one end of main pipeline is connected with described liquid nitrogen tank vehicles, and its other end is connected with the first feeding pipe；
The input of described cryogenic liquid pump is connected on described main pipeline, and the output end of described cryogenic liquid pump is also associated with
Two feeding pipes, the pipeline main body section of described second feeding pipe in described liquid nitrogen gasification device, described second supply pipe
The end on road stretches out in described liquid nitrogen gasification device；
Ventilating fan for lowering the temperature to described pipeline main part is provided with described liquid nitrogen gasification device；
First control valve is provided with described first feeding pipe, described second feeding pipe is provided with the second control valve, institute
State and main control valve is provided with main pipeline.
2. a kind of mining liquid nitrogen fire extinguishing device according to claim 1 is it is characterised in that described pipeline main part is by many
Individual U-tube is sequentially connected with and is formed.
3. a kind of mining liquid nitrogen fire extinguishing device according to claim 1 is it is characterised in that described ventilating fan passes through to connect
Pipe and the underground pressure air system connectivity treating fire extinguishing area.
4. a kind of mining liquid nitrogen fire extinguishing device according to claim 3 is it is characterised in that on described liquid nitrogen gasification device
It is provided with the ventilating fan described at least two that breather line links together, described breather line is with described connecting tube even
Connect.
5. a kind of mining liquid nitrogen fire extinguishing device according to claim 1 is it is characterised in that described first feeding pipe
End has multiple nozzles.
6. a kind of mining liquid nitrogen fire extinguishing device according to claim 1 is it is characterised in that described cryogenic liquid pump and liquid
Self-locking support seat is provided with nitrogen gasifying device.
7. a kind of mining liquid nitrogen fire extinguishing device according to claim 1 is it is characterised in that on described first feeding pipe
It is provided with first pressure table；
It is located on described second feeding pipe and be provided with second pressure between described cryogenic liquid pump and described liquid nitrogen gasification device
Table, described second feeding pipe is located at the end of described second feeding pipe and described liquid nitrogen gasification device is provided with the 3rd pressure
Power table.
8. a kind of using method carrying out fire extinguishing using the mining liquid nitrogen fire extinguishing device described in claim 1, it include as
Lower step：
Step 1：Open main control valve；
Step 2：If carrying out fire extinguishing using liquid nitrogen, open the first control valve on the first feeding pipe, liquid nitrogen is via described
First feeding pipe sprays, to carry out fire extinguishing；
If carrying out fire extinguishing using gas nitrogen, open the second control valve on the second feeding pipe, liquid nitrogen is from cryogenic liquid pump stream
Enter in described second feeding pipe, and gasify in liquid nitrogen gasification device, liquid nitrogen gasification is gas nitrogen, and meanwhile, ventilating fan is to pipeline
Main part is lowered the temperature, and the end through described second feeding pipe for the gas nitrogen sprays, to carry out fire extinguishing.
If 9. using method according to claim 8 was it is characterised in that both needed to carry out fire extinguishing using liquid nitrogen, need again
To carry out fire extinguishing using gas nitrogen, then to keep it turned on described first control valve and described second control valve.
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| CN201410849329.5A CN104594938B (en) | 2014-12-29 | 2014-12-29 | Mine liquid nitrogen fireproof and fire extinguishing device and use method thereof |
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| CN201410849329.5A CN104594938B (en) | 2014-12-29 | 2014-12-29 | Mine liquid nitrogen fireproof and fire extinguishing device and use method thereof |
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| CN104594938B true CN104594938B (en) | 2017-02-22 |
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Families Citing this family (7)
| 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 |
| 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 |
| CN110314302A (en) * | 2019-04-02 | 2019-10-11 | 伊思特（北京）能源科技有限公司 | For the fire retardant device of coal yard dump high temperature combustible zone spray covering inert gas |
| 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 |
| CN114949683A (en) * | 2022-01-12 | 2022-08-30 | 中国矿业大学(北京) | Self-pressurization and anti-detonation device of liquid carbon dioxide fire prevention and extinguishing system |
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