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Method of extinguishing alkali metal fire

A technology of alkali metal and fire, which is applied in fire rescue and other fields, can solve the problems of easy sinking and unsatisfactory extinguishing of alkali metal fire, and achieve the effect of preventing secondary recombustion

Inactive Publication Date: 2017-04-19
合肥辰泰安全设备有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the specific gravity of sand and table salt is heavier than that of alkali metal, it is easy to sink to the bottom, so that the high-temperature alkali metal is re-exposed to the air and undergoes secondary combustion, so it is not very ideal for extinguishing alkali metal fires

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Extinguishing sodium metal fires:

[0019] (1) Material preparation: liquid nitrogen, graphite powder, fire extinguishing tank for liquid nitrogen dispensing on site, the particle size of graphite powder is 50 mesh;

[0020] (2) Filling of raw materials: put graphite powder in the fire extinguishing tank, then pour liquid nitrogen into it, and add 250 grams of graphite powder to each liter of liquid nitrogen;

[0021] (3) Fire extinguishing: Throw the fire extinguishing tank into the fire, the fire extinguishing pipe is damaged, and the mixture of liquid nitrogen and graphite overflows to complete the fire extinguishing.

[0022] This method has high fire extinguishing efficiency for sodium fire. The rapid gasification of liquid nitrogen causes the ambient temperature to drop sharply, and at the same time, a large amount of nitrogen is released to isolate the air and extinguish the sodium fire; the configured graphite powder is sprayed on the surface of the burning sod...

Embodiment 2

[0024] Extinguishing potassium metal fires:

[0025] (1) Material preparation: liquid nitrogen, graphite powder, fire extinguishing tank for liquid nitrogen dispensing on site, the particle size of graphite powder is 70 mesh;

[0026] (2) Filling of raw materials: put graphite powder in the fire extinguishing tank, then pour liquid nitrogen into it, and add 350 grams of graphite powder to each liter of liquid nitrogen;

[0027] (3) Fire extinguishing: Throw the fire extinguishing tank into the fire, the fire extinguishing pipe is damaged, and the mixture of liquid nitrogen and graphite overflows to complete the fire extinguishing.

[0028] This method has high fire extinguishing efficiency for potassium fire. The rapid gasification of liquid nitrogen causes the ambient temperature to drop sharply, and at the same time, a large amount of nitrogen is released to isolate the air and extinguish the sodium fire; the configured graphite powder is sprayed on the surface of the burni...

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Abstract

The invention discloses a method of extinguishing alkali metal fire. The method includes the following steps: preparing materials including liquid nitrogen and graphite powder, and a fire extinguishing tank for charging the liquid nitrogen on site; raw material filling: placing the graphite powder into the fire extinguishing tank and pouring the liquid nitrogen; fire extinguishing: throwing the fire extinguishing tank into fire scene, and when the tank is broken, the mixture of the liquid nitrogen and graphite flows out to extinguish the fire. The method can prevent re-combustion.

Description

technical field [0001] The invention relates to fire-fighting technology, in particular to a method for extinguishing alkali metal fires. Background technique [0002] Alkali metal is a kind of very active metal element, which is easy to burn in the air and has great fire hazard. The flame of alkali metal fire is very low, and some thick smoke is aerosol, which has strong alkali It has severe burning ability to the skin of humans and animals, especially to the eyes and respiratory system. Therefore, need a kind of fire extinguishing method of efficient extinguishing alkali metal exergy. [0003] The characteristics of alkali metal fire are: the surface burns, generates a large amount of heat, and produces a large amount of dense smoke, which makes it difficult for personnel to extinguish the fire at close range. Moreover, the fire has a strong regeneration ability, is difficult to extinguish, and is prone to secondary combustion. The chemical activity of alkali metals has ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A62C3/06A62C31/00
CPCA62C3/06A62C31/00
Inventor 季慢慢李学林张莉侯少华吴俊保张峰
Owner 合肥辰泰安全设备有限责任公司
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