CN112843549A - Method for extinguishing underground fire by high-pressure direct injection and low-temperature liquid nitrogen - Google Patents
Method for extinguishing underground fire by high-pressure direct injection and low-temperature liquid nitrogen Download PDFInfo
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- CN112843549A CN112843549A CN202110053065.2A CN202110053065A CN112843549A CN 112843549 A CN112843549 A CN 112843549A CN 202110053065 A CN202110053065 A CN 202110053065A CN 112843549 A CN112843549 A CN 112843549A
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- liquid nitrogen
- fire
- extinguishing
- high pressure
- underground
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C27/00—Fire-fighting land vehicles
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C99/00—Subject matter not provided for in other groups of this subclass
- A62C99/0009—Methods of extinguishing or preventing the spread of fire by cooling down or suffocating the flames
- A62C99/0018—Methods of extinguishing or preventing the spread of fire by cooling down or suffocating the flames using gases or vapours that do not support combustion, e.g. steam, carbon dioxide
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- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
The invention discloses a method for extinguishing underground fire by high-pressure direct injection low-temperature liquid nitrogen, which utilizes the fire extinguishing characteristic of the liquid nitrogen to directly spray the liquid nitrogen into the front edge of an underground fire wire at high pressure, and the liquid nitrogen absorbs a large amount of heat during gasification, so that the temperature of a fire area can be quickly reduced; the volume is rapidly increased while the liquid nitrogen is gasified, and simultaneously gas shock waves are formed, so that oxygen in the air near a fire disaster is rapidly diluted and isolated, and the purpose of extinguishing underground fire is achieved. It can also be used for extinguishing various fire disasters.
Description
Technical Field
The invention relates to the technical field of fire treatment, in particular to a method for extinguishing underground fire by high-pressure direct injection low-temperature liquid nitrogen.
Background
At present, in various extremely large fires in the world, particularly oil well fires, natural gas well fires and underground coal fires which cannot be extinguished, forest fires, urban building fires, factory fires, grassland fires and chemical plants which are easy to explode and burn various fires often cause that a plurality of large fires cannot be extinguished in time due to a plurality of reasons such as lagging technical equipment, and immeasurable casualties and huge loss of resource assets are caused.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a method for extinguishing underground fire by high-pressure direct injection low-temperature liquid nitrogen.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for extinguishing underground fire by high-pressure direct injection low-temperature liquid nitrogen comprises the following specific processes:
continuously preparing liquid nitrogen by using a nitrogen separation and liquid nitrogen manufacturing device, and continuously supplying power to the nitrogen separation and liquid nitrogen manufacturing device by using a vehicle-mounted large-capacity power storage cabinet;
by utilizing the fire extinguishing characteristic of liquid nitrogen, the liquid nitrogen is directly sprayed into the front edge of the fire wire of the underground fire at high pressure by adopting a high-pressure liquid nitrogen spraying fire extinguishing device, and a large amount of heat can be absorbed when the liquid nitrogen is gasified, so that the temperature of the front edge of the fire wire can be quickly reduced, and the spreading speed of the fire wire is slowed down; the volume of the gas is rapidly increased while the liquid nitrogen is gasified, so that gas shock waves are formed, oxygen in the surrounding air is rapidly diluted and isolated, and the purpose of extinguishing underground fire is achieved.
Further, the prepared liquid nitrogen enters a liquid nitrogen storage tank or a liquid nitrogen transmission pipeline, and the high-pressure liquid nitrogen spraying fire extinguishing device directly sprays the liquid nitrogen in the liquid nitrogen storage tank or the liquid nitrogen transmission pipeline into the front edge of the fire wire of the underground fire at high pressure.
Further, the nitrogen separation and liquid nitrogen manufacturing device, the vehicle-mounted large-capacity electricity storage cabinet, the liquid nitrogen storage tank or the liquid nitrogen transmission pipeline and the high-pressure liquid nitrogen spraying fire extinguishing device are arranged on the mobile vehicle.
The invention has the beneficial effects that: according to the method, the fire extinguishing characteristic of liquid nitrogen is utilized, the liquid nitrogen is directly sprayed into the front edge of the underground fire wire at high pressure, and the liquid nitrogen absorbs a large amount of heat when gasified, so that the temperature of a fire area can be quickly reduced; the volume is rapidly increased while the liquid nitrogen is gasified, and simultaneously gas shock waves are formed, so that oxygen in the air near a fire disaster is rapidly diluted and isolated, and the purpose of extinguishing underground fire is achieved. It can also be used for extinguishing various fire disasters.
Drawings
FIG. 1 is a schematic connection diagram of an apparatus required for implementing the method in an embodiment of the present invention;
fig. 2 is a state diagram of the implementation of the method in the embodiment of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings, and it should be noted that the present embodiment is based on the technical solution, and the detailed implementation and the specific operation process are provided, but the protection scope of the present invention is not limited to the present embodiment.
The embodiment provides a method for extinguishing underground fire by high-pressure direct injection low-temperature liquid nitrogen, as shown in fig. 1-2, the specific process is as follows:
continuously preparing liquid nitrogen by using a nitrogen separation and liquid nitrogen manufacturing device 3, continuously supplying power to the nitrogen separation and liquid nitrogen manufacturing device 3 by using a vehicle-mounted large-capacity electricity storage cabinet 2, and feeding the prepared liquid nitrogen into a liquid nitrogen storage tank or a liquid nitrogen transmission pipeline 6;
by utilizing the fire extinguishing characteristic of liquid nitrogen, the high-pressure liquid nitrogen spraying fire extinguishing device 4 is adopted to directly spray the liquid nitrogen 5 in the liquid nitrogen storage tank or the liquid nitrogen transmission pipeline 6 into the front edge 7 of the fire wire of the underground fire at high pressure, and the liquid nitrogen 5 can absorb a large amount of heat when gasified, so that the temperature of the front edge 7 of the fire wire can be quickly reduced, and the spreading speed of the fire wire is slowed down; the volume of the gas is rapidly increased while the liquid nitrogen is gasified, so that gas shock waves 8 are formed, oxygen in the surrounding air is rapidly diluted and isolated, and the purpose of extinguishing underground fire is achieved.
In the present embodiment, the nitrogen gas separation and liquid nitrogen manufacturing apparatus 3, the on-board large-capacity electric storage cabinet 2, the liquid nitrogen storage tank or liquid nitrogen transmission line, and the high-pressure liquid nitrogen injection fire extinguishing apparatus 4 are provided on the mobile vehicle 1 (fire engine, etc.).
Various corresponding changes and modifications can be made by those skilled in the art based on the above technical solutions and concepts, and all such changes and modifications should be included in the protection scope of the present invention.
Claims (3)
1. A method for extinguishing underground fire by high-pressure direct injection low-temperature liquid nitrogen is characterized by comprising the following specific processes:
continuously preparing liquid nitrogen by using a nitrogen separation and liquid nitrogen manufacturing device, and continuously supplying power to the nitrogen separation and liquid nitrogen manufacturing device by using a vehicle-mounted large-capacity power storage cabinet;
by utilizing the fire extinguishing characteristic of liquid nitrogen, the liquid nitrogen is directly sprayed into the front edge of the fire wire of the underground fire at high pressure by adopting a high-pressure liquid nitrogen spraying fire extinguishing device, and a large amount of heat can be absorbed when the liquid nitrogen is gasified, so that the temperature of the front edge of the fire wire can be quickly reduced, and the spreading speed of the fire wire is slowed down; the volume of the gas is rapidly increased while the liquid nitrogen is gasified, so that gas shock waves are formed, oxygen in the surrounding air is rapidly diluted and isolated, and the purpose of extinguishing underground fire is achieved.
2. The method for extinguishing underground fire by high pressure direct injection low temperature liquid nitrogen according to claim 1, wherein the prepared liquid nitrogen is introduced into a liquid nitrogen storage tank or a liquid nitrogen transmission pipeline, and the high pressure liquid nitrogen injection fire extinguishing device injects the liquid nitrogen in the liquid nitrogen storage tank or the liquid nitrogen transmission pipeline directly into the front edge of the fire line of the underground fire at high pressure.
3. The method for extinguishing underground fire with high pressure direct injection cryogenic liquid nitrogen according to claim 1, characterized in that the nitrogen separation and liquid nitrogen manufacturing device, the on-board large capacity electric storage cabinet, the liquid nitrogen storage tank or liquid nitrogen transmission pipeline, the high pressure liquid nitrogen injection fire extinguishing device are arranged on a mobile vehicle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110053065.2A CN112843549A (en) | 2021-01-15 | 2021-01-15 | Method for extinguishing underground fire by high-pressure direct injection and low-temperature liquid nitrogen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110053065.2A CN112843549A (en) | 2021-01-15 | 2021-01-15 | Method for extinguishing underground fire by high-pressure direct injection and low-temperature liquid nitrogen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112843549A true CN112843549A (en) | 2021-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110053065.2A Pending CN112843549A (en) | 2021-01-15 | 2021-01-15 | Method for extinguishing underground fire by high-pressure direct injection and low-temperature liquid nitrogen |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050224239A1 (en) * | 2002-07-25 | 2005-10-13 | Alden Ozment | Method for fighting fire in confined areas using nitrogen expanded foam |
| CN1684741A (en) * | 2002-07-25 | 2005-10-19 | 奥尔登·奥兹门特 | Method and device for fighting fire in confined areas |
| CN102562125A (en) * | 2012-02-08 | 2012-07-11 | 中国矿业大学 | Ground direct injection type liquid nitrogen fire preventing and extinguishing system |
| CN104594938A (en) * | 2014-12-29 | 2015-05-06 | 神华集团有限责任公司 | Mine liquid nitrogen fireproof and fire extinguishing device and use method thereof |
| CN104775843A (en) * | 2015-04-02 | 2015-07-15 | 神华集团有限责任公司 | Liquid nitrogen fireproof fire extinguishing system and method |
| CN111803826A (en) * | 2020-07-16 | 2020-10-23 | 中国矿业大学 | Movable liquid nitrogen fire extinguishing system for comprehensive pipe gallery and fire extinguishing method thereof |
-
2021
- 2021-01-15 CN CN202110053065.2A patent/CN112843549A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050224239A1 (en) * | 2002-07-25 | 2005-10-13 | Alden Ozment | Method for fighting fire in confined areas using nitrogen expanded foam |
| CN1684741A (en) * | 2002-07-25 | 2005-10-19 | 奥尔登·奥兹门特 | Method and device for fighting fire in confined areas |
| CN102562125A (en) * | 2012-02-08 | 2012-07-11 | 中国矿业大学 | Ground direct injection type liquid nitrogen fire preventing and extinguishing system |
| CN104594938A (en) * | 2014-12-29 | 2015-05-06 | 神华集团有限责任公司 | Mine liquid nitrogen fireproof and fire extinguishing device and use method thereof |
| CN104775843A (en) * | 2015-04-02 | 2015-07-15 | 神华集团有限责任公司 | Liquid nitrogen fireproof fire extinguishing system and method |
| CN111803826A (en) * | 2020-07-16 | 2020-10-23 | 中国矿业大学 | Movable liquid nitrogen fire extinguishing system for comprehensive pipe gallery and fire extinguishing method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 上海市热处理协会: "《实用热处理手册》", 31 January 2009, 上海科学技术出版社 * |
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Application publication date: 20210528 |
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| RJ01 | Rejection of invention patent application after publication |