Core-shell structure powder fire extinguishing medium and preparation method and application thereof

A technology of fire extinguishing medium and core-shell structure, which is applied in the direction of fire prevention equipment, etc., can solve the problems of being unable to effectively block the contact between the fuel liquid surface and the air, difficult cooling effect and chemical fire extinguishing effect, and no covering fire extinguishing effect, so as to achieve good reburning , good versatility, and the effect of increasing the contact area

Active Publication Date: 2019-11-15
中国人民警察大学
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, water fire extinguishing still belongs to the category of physical effects, and its efficiency is low. Although the fire extinguishing efficiency can be improved by adding additives to the water or using fine water mist to extinguish fire, due to the low vaporization temperature of water, the mist droplets are often near or even far away. Vaporization occurs in the area of ​​the flame, and it is difficult to transport it to the core area of ​​the flame reaction to play a role in cooling and chemical fire extinguishing
In addition, water does not have the effect of covering the fire and cannot effectively block the contact between the liquid surface of the fuel and the air. Even if the fire is extinguished, it may re-ignite at any time
Dry powder has a certain covering effect in the fire extinguishing process, but it has no cooling effect, and its fluidity is poor, so its application places are limited by its own performance
In addition, the fire extinguishing efficiency and versatility of water or dry powder fire extinguishing agent also need to be further improved

Method used

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  • Core-shell structure powder fire extinguishing medium and preparation method and application thereof
  • Core-shell structure powder fire extinguishing medium and preparation method and application thereof
  • Core-shell structure powder fire extinguishing medium and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] In this example, the core-shell structure powder fire extinguishing medium is prepared from water, potassium nitrate, silicon dioxide, sodium alginate and methyl hydrogen-containing silicone oil with high hydrogen content, and the mass percentage of each raw material is:

[0046]

[0047] The preparation method is:

[0048] At room temperature, pour potassium nitrate into water and stir until completely dissolved, then add sodium alginate and stir evenly;

[0049] Pour the above liquid into the mixing container of a high-speed mixer, add silicon dioxide and high hydrogen-containing methyl hydrogen silicone oil in sequence, and continuously stir for 30 seconds at a speed of 15,000 r / min to obtain a core-shell structure powder fire extinguishing medium.

Embodiment 2

[0051] The preparation method is basically the same as in Example 1, except that the preparation raw materials and their mass percentages are:

[0052]

Embodiment 3

[0054] The preparation method is basically the same as in Example 1, except that the preparation raw materials and their mass percentages are:

[0055]

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Abstract

The invention discloses a core-shell structure powder fire extinguishing medium and a preparation method and application thereof, and relates to the technical field of fire extinguishing. The core-shell structure powder fire extinguishing medium is prepared from, by weight, 2-10 parts of a shell material and 85-98 parts of a core material, wherein the core material is a potassium salt aqueous solution or an iron salt dispersion liquid. The core-shell structure powder fire extinguishing medium is clean, environmentally friendly, safe and free of toxins, is simple in preparation process, high incooling speed, good in liquidity, low in corrosivity to storage equipment and conveying pipelines, good in stability and wide in application range, can quickly extinguish gas, liquid and solid fires,does not generate harmful gas and environmental pollution in the fire extinguishing process, and has good economic and social benefits.

Description

technical field [0001] The invention relates to the technical field of fire extinguishing materials, in particular to a core-shell structure powder fire extinguishing medium and its preparation method and application. Background technique [0002] Among the traditional fire extinguishing agents, water and dry powder are regarded as the main substitutes for halon fire extinguishing agents due to their low price, abundant resources, rapid fire extinguishing, and suitability for various types of fires. However, water fire extinguishing still belongs to the category of physical effects, and its efficiency is low. Although the fire extinguishing efficiency can be improved by adding additives to the water or using fine water mist to extinguish fire, due to the low vaporization temperature of water, the mist droplets are often near or even far away. The area of ​​the flame is vaporized, and it is difficult to transport it to the core area of ​​the flame reaction to play a role in c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A62D1/00
CPCA62D1/0014
Inventor 张天巍刘皓张存位梁强李春
Owner 中国人民警察大学
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