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Biomass gel-based dry water powder extinguishing agent and preparation method thereof

A technology of biomass and fire extinguishing agent, which is applied in the direction of fire prevention equipment, etc., can solve the problems of insufficient water cooling performance, unsatisfactory fire extinguishing effect of large-scale fires, and structural damage of dry water fire extinguishing agent. Abundant reserves, the effect of improving fire extinguishing efficiency

Active Publication Date: 2021-01-12
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, water also has obvious deficiencies. Due to its good fluidity, most of the water will be lost after being sprayed into the fire scene, or the water has not reached the combustion zone and has been vaporized due to the high temperature of the fire scene, so that the cooling performance of water cannot be fully exerted. The fire extinguishing effect is not ideal for large-scale fires with large area, rapid fire development, easy to re-ignite, and difficult to extinguish
[0003] The dry water fire extinguishing agent makes water and hydrophobic substances into a fire extinguishing agent with a water-in-oil structure, which restricts the free flow of water, reduces the amount of dry water fire extinguishing agent, and improves the fire extinguishing effect. The aqueous solution with high performance is used as the basic raw material, and the outer wall modification with fire extinguishing performance or flame suppression performance is not used, so the fire extinguishing efficiency is low and the dosage is large; The structure makes it less pressure resistant, and it is easily broken by external forces during production, transportation and storage. A certain amount of dry water fire extinguishing agent structure is destroyed during inflation and spraying, thereby reducing fire extinguishing efficiency.

Method used

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  • Biomass gel-based dry water powder extinguishing agent and preparation method thereof
  • Biomass gel-based dry water powder extinguishing agent and preparation method thereof

Examples

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Effect test

Embodiment 1

[0034] A biomass gel-based dry water powder fire extinguishing agent, its raw materials and mass percentages are: 8% hydrophobic fumed silica, 0.2% calcium carbonate, 1.5% carrageenan, 0.1% silicon ether copolymer, and the balance is to ionized water.

[0035] The specific preparation method is: dissolving carrageenan in deionized water to prepare a carrageenan solution, and then adding CaCO 3, mixed at a speed of 1000 rpm for 30 minutes, and then added the silicone ether copolymer (the silicone ether copolymer can extend and spread on the surface of the liquid film, thereby making the liquid film thinner and ruptured to produce water-oil phase separation. The phases are continuously pulled and stretched until the liquid film ruptures, which leads to the destruction and disappearance of the foam, and avoids the foam from hindering the formation of the core-shell structure), stirs and dissolves evenly, immediately adds hydrophobic fumed silica, and rotates at 3000 rpm Stir for...

Embodiment 2

[0046] A biomass gel-based dry water powder fire extinguishing agent, its raw materials and mass percentages are: 8.3% hydrophobic fumed silica, 1.0% sodium chloride, 0.1% carrageenan, 0.5% cyclodextrin, silicon ether copolymer 0.1%, the balance is deionized water.

[0047] 0.1g carrageenan is dissolved in deionized water to prepare 10g carrageenan solution (concentration 1wt%), and 0.55g cyclodextrin is dissolved in deionized water to prepare 40g cyclodextrin solution (concentration 1.4wt%), and then the resulting Pour the carrageenan solution and the cyclodextrin solution into two dropping funnels respectively, put the beaker containing 50g NaCl solution (concentration 2.2wt%) into the ultrasonic container, adjust the temperature to 20°C, and turn on the ultrasonic switch after the temperature is constant And adjust a certain stirring speed (500r / min), control a certain dropping speed (60ml / min) and drop the carrageenan and cyclodextrin solution into the NaCl solution drop b...

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Abstract

The invention relates to a biomass gel-based dry water powder extinguishing agent and a preparation method thereof. The invention relates to a biomass gel-based dry water powder extinguishing agent, which comprises the following components in percentage by mass: 5-10% of hydrophobic solid particles, 0.1-1.0% of water-phase matrix, 0.5-2.0% of gelatinizing agent and the balance of water. The fire extinguishing agent is high in stability, excellent in fire extinguishing efficiency and environmentally friendly. Compared with a common dry water fire extinguishing agent, the fire extinguishing agent has the advantages that the gelatinizing agent and the water-phase matrix are added into a water base, an internal solution is converted into gel through reaction between the gelatinizing agent andthe water-phase matrix, the pressure resistance and the water-retaining property of the fire extinguishing agent are greatly improved, and the fire extinguishing agent has wide application prospects.

Description

technical field [0001] The invention belongs to the technical field of fire-fighting materials, and relates to a biomass gel-based dry water powder fire extinguishing agent and a preparation method thereof. Background technique [0002] In the early 1980s, research by relevant experts showed that the emission of chlorofluorocarbons in the atmosphere, including halon fire extinguishing agents, destroyed the earth’s atmospheric ozone layer and endangered the living environment of human beings. Halon fire extinguishing agents It has been phased out and banned gradually, and all countries in the world have stepped up the research and development of halon substitute products, seeking clean, efficient and green fire extinguishing products. Fire extinguishing methods include inert gas fire extinguishing, aerosol fire extinguishing, water-based fire extinguishing, dry powder fire extinguishing, etc. Water has a strong heat absorption capacity and has a significant cooling effect on...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A62D1/00
CPCA62D1/0064A62D1/0014
Inventor 陈先锋邹嫣嫣袁必和樊傲廖若愚杨曼张祖忞何松
Owner WUHAN UNIV OF TECH
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