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A highly concentrated environment-friendly fluorine-free compressed air foam fire extinguishing agent

A compressed air foam and high-concentration technology, applied in fire prevention equipment, etc., can solve problems such as negative impact on human health, biological toxicity, and difficulty in biodegradation, and achieve no impact on human health, excellent environmental protection performance, and excellent anti-reburning effect Effect

Active Publication Date: 2021-11-23
应急管理部天津消防研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the stable nature of these components, they are difficult to biodegrade and have biological toxicity, they have been listed as persistent organic pollutants by international conventions and their use is restricted.
Studies have reported that non-PFOS fluorosurfactants commonly used in foam fire extinguishing agent components are also difficult to biodegrade, and there is a risk of being restricted in the future
Existing fire extinguishing foam products generally add a large amount of ether substances as foam stabilizers, but studies have confirmed that this substance is highly toxic to mammals and aquatic organisms, such as oral LD ​​of ethylene glycol butyl ether in mice 50 The value is 1200mg / kg, the 96hLC of fish 50 The value is 835mg / L, and it also has a negative impact on human health

Method used

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  • A highly concentrated environment-friendly fluorine-free compressed air foam fire extinguishing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026]Embodiment 1: A kind of highly concentrated environment-friendly fluorine-free compressed air foam fire extinguishing agent, the weight percent of each component consists of: sodium dodecyl diphenyl ether disulfonate 13%, 1,5-bis[6-O -(n-butyl-α-D-glucopyranoside)] glutarate 10%, non-ionic polyoxyethylene modified polydimethylsiloxane 15%, PEG-200 15%, urea 4.5 %, ethylene glycol 10%, 2-methyl-4-isothiazolin-3-one 0.5%, the balance water.

[0027] Preparation steps: first weigh water and add it to the reaction tank, add urea at 250-300 rpm and stir to dissolve, then add PEG-200 and ethylene glycol, continue to add dodecyl diphenyl under the condition of stirring at 250-300 rpm Sodium ether disulfonate, 1,5-bis[6-O-(n-butyl-α-D-glucopyranoside)] glutarate, nonionic polyoxyethylene modified polydimethylsiloxane Oxane, 2-methyl-4-isothiazolin-3-one, stir until each component is fully dissolved and mixed evenly to obtain this product.

Embodiment 2

[0028] Embodiment 2: A kind of highly concentrated environment-friendly fluorine-free compressed air foam fire extinguishing agent, the weight percentage of each component is composed of: sodium tridecyl sulfosuccinate 15%, N, N'-dialkyl- N,N'-bis[2-(lactobiose amino acid)-methylene]adipamide 10%, methyl(propyl(polypropylene oxide)methyl)siloxane 12%, PEG- 400 18%, urea 5%, glycerol 15%, methyl p-hydroxybenzoate 0.4%, the balance water.

[0029] It can be prepared according to the steps of Example 1.

Embodiment 3

[0030] Embodiment 3: A kind of highly concentrated environment-friendly fluorine-free compressed air foam fire extinguishing agent, the weight percentage of each component is composed of 12% diisooctyl sodium sulfosuccinate, dimethylene-1,2-bis(- Polyethylene glycol dodecylamide) 13%, 2-[acetoxy (polyoxyethylene) propyl] heptamethyltrisiloxane 12%, PEG-200 5%, PEG-600 10%, urea 9 %, isopropanol 15%, 2-[acetoxy (polyoxyethylene) propyl] heptamethyltrisiloxane 0.5%, the balance water.

[0031] It can be prepared according to the steps of Example 1.

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Abstract

The invention discloses a highly concentrated environment-friendly fluorine-free compressed air foam fire extinguishing agent. Its components and weight percentages are: foaming agent 10-25%, flow enhancer 5-18%, foam stabilizer 5-25%, antifreeze agent 8-15%, bactericide 0.3-1.2%, and the balance for water. The foam fire extinguishing agent of the present invention has the characteristics of high concentration, and the minimum mixing ratio can be as low as 0.5%. The freezing point can reach ‑35°C, and it can be used normally in a low temperature environment. The product is suitable for fresh water and sea water. The invention can quickly extinguish fires of non-water-soluble flammable liquids, has strong resurgence resistance, can also quickly extinguish solid material fires, and is applicable to a wide range of fire extinguishing objects. The product does not contain fluorosurfactants and ether components, each component can be rapidly biodegraded in the environment, and has no toxic effect on animals and plants in the environment, and has no pollution to the environment after use, and has no impact on human health.

Description

technical field [0001] The invention relates to a fire extinguishing agent, in particular to a highly concentrated environment-friendly fluorine-free compressed air foam fire extinguishing agent. Background technique [0002] At present, the low multiple foam fire extinguishing agent used to put out flammable liquid fires generally has the problems of poor foam stability, low fire extinguishing efficiency, and easy re-ignition after fire extinguishing. When used in the fire fighting scene, it is necessary to increase the foam supply strength and use excess foam. Fire extinguishing agent can control the fire, which greatly prolongs the fire extinguishing time. Therefore, fire fighting and rescue urgently need efficient and suitable foam fire extinguishing agent products to improve fire extinguishing efficiency, reduce fire losses, reduce the amount of foam fire extinguishing agent and water, and reduce the impact of fire fighting and rescue activities. impact on the environme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A62D1/02A62D1/04
CPCA62D1/0071
Inventor 包志明张宪忠靖立帅宋波傅学成胡成陈旸陈涛王荣基
Owner 应急管理部天津消防研究所
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