Concentrated high-efficient fire extinguishing agent and preparation method thereof

Abstract

The invention belongs to the field of chemical materials, and particularly relates to a concentrated high-efficient fire extinguishing agent and a preparation method thereof. The concentrated high-efficient fire extinguishing agent is prepared from the following raw materials: urea, ammonium chloride, ammonium sulfate, sodium bicarbonate, potassium carbonate, a sodium silicate gel solution, ethylene glycol, ammonium polyphosphate, a surfactant, a foaming agent and water. The fire extinguishing agent is fewer in raw materials, low in cost, high in fire extinguishing grade, wide in application range and good in anti-reflash performance; the fire extinguishing agent is low in freezing point, so that the freezing point is applicable to the low-temperature environment of the northeast area; the fire extinguishing agent is concentrated, and before use, the fire extinguishing agent is mixed with water according to a ratio of 1:16 and can extinguish fires of 2A and 89B, so that the fire extinguishing agent occupies small space when being stored conventionally; and the fire extinguishing agent is soluble in water, so that a uniform solution state can be reached immediately after the fire extinguishing agent is mixed with water.

Description

technical field [0001] The invention belongs to the field of chemical materials, in particular to a concentrated high-efficiency fire extinguishing agent and a preparation method thereof. Background technique [0002] Fire is a major disaster in today's society. Fires occur almost every day in the country, often causing huge losses of life and property. How to quickly extinguish fires, save lives as much as possible, and reduce economic losses has always been a focus of attention of the people and the government. With the rapid development of industry, countries all over the world rely more and more on crude oil and fuel oil, and there are more and more storage tanks for various oil products. The fire accidents of crude oil, fuel oil and flammable liquid chemicals are also increasing year-on-year. Once a flammable liquid fire breaks out, it is very difficult to control the fire. [0003] At present, the more effective fire extinguishing method is to form an isolation film ...

AI Technical Summary

Problems solved by technology

Among them, water is a commonly used fire extinguishing agent, but it cannot be used to extinguish fires caused by flammable liquids with a density less than water or insoluble in water, such as gasoline, kerosene, diesel oil and other oils. For flammable liquids with a density greater than water, although water can float Its surface, but the surface tension of water is small and has no viscosity, and the evaporation speed is fast in a high temperature environment, it is difficult to form an isolation layer on the surface of flammable liquids, although low-tension water that can float on the surface of flammable liquids has also been developed, but its It is not a stable system, cannot float for a long time, and evaporates quickly in a high temperature environment, and the remaining part of the water will settle to the bottom, which will not be able to extinguish the fire; the foam fire extinguishing agent can form a foam layer on the surface of the burning liquid, which will The burning liquid is isolated from the air, but the interaction force between its molecules is small, and the foam layer is easy to break in a high-temperature environment, so that the flame escapes and causes re-ignition. At the same time, the foam fire extinguishing agent is not suitable for conventional large-scale storage, and it is not easy to clean up after a disaster; Carbon dioxide fire extinguishing agent needs to be compressed and liquefied and stored in steel cylinders. Due to the limitation of storage container capacity, carbon dioxide fire extinguishing agent is not suitable for large quantities of storage, and can only be used for initial fires or small fires; fire-fighting sand is not suitable for transportation and requires a lot of ground space for storage. Therefore, it is only suitable for the initial stage of a fire or a small fire, and fire-fighting sand is not easy to clean up after a disaster; the fire-extinguishing base material of the existing BC dry powder fire extinguishing agent is mainly sodium bicarbonate, and there are also potassium bicarbonate, potassium chloride, sodium chloride, sulfuric acid Potassium, ammonium sulfate, etc. are used as the fire extinguishing base material. The existing BC dry powder fire extinguishing agent with sodium bicarbonate as the fire extinguishing base material is mainly used to isolate combustible substances and oxygen in the air to achieve the purpose of fire extinguishing. , this fire extinguishing principle requires the use of more fire extinguishing agents to extinguish the fire. Therefore, the existing BC dry powder fire extinguishing agents generally have the problems of low fire extinguishing efficiency and serious pollution.

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