CN105771144A - Preparation method of high-molecular thickening forest fire extinguishing agent - Google Patents

Abstract

The invention provides a preparation method of a macromolecular thickening forest fire extinguishing agent, the formula of which is 75-100 parts of ammonium sulfate, 175-200 parts of urea, 0.5-1.5 parts of a polymer thickener and 475-550 parts of water. The preparation steps are as follows: dissolving ammonium sulfate and urea in water first, dissolving the polymer thickener in water alone, and then mixing and stirring the two aqueous solutions for 0.5h-1h until viscous. The present invention has the advantages of using a polymer reagent as a thickening agent to make the fire extinguishing agent good in stability, high in effective viscosity and resistant to storage, and the thickened forest fire extinguishing agent can improve the penetration ability from tree crowns to surface combustibles and keep more stable. It has a long flame retardation time and can be sprayed at a higher spraying height, which is safer for firefighters.

Description

A kind of preparation method of polymer thickened forest fire extinguishing agent

technical field

The invention belongs to the field of fire-fighting materials for fire-fighting supplies, and in particular relates to a preparation method of a polymer-thickened forest fire-extinguishing agent.

Background technique

At present, forest fire extinguishing agents on the market can be divided into short-acting fire extinguishing agents and long-acting fire extinguishing agents according to the length of action. Short-acting fire extinguishing agents include pure water, thickened water, foam fire extinguishing agents, etc. When the water is completely evaporated, they will not have the ability to prevent and extinguish fire; while aqueous solutions such as diammonium hydrogen phosphate, ammonium sulfate, ammonium carbonate, and ammonium sulfate After the water is evaporated, it still has the ability to block and extinguish fire, so this kind of fire extinguishing agent is called long-acting fire extinguishing agent. The use of fire extinguishing agent is generally spraying or spraying in the air, but there is a serious disadvantage. When using it, especially when spraying in the air, the fire extinguishing agent will be in the form of mist after being sheared by the wind during the landing process and then blown by the wind. As a result, the fire extinguishing agent that can reach the ground is greatly reduced, and even at a certain height, the fire extinguishing agent cannot reach the ground at all. Therefore, it is essential to thicken the fire extinguishing agent. At present, there are mainly two types of fire extinguishing agent thickeners. One is clay (such as bentonite) as a thickener, but it also has the disadvantage of drifting with the wind; the second is One is to use gum as a thickener (such as alginate gum, pectin, guar gum, etc.), but this type of natural material is relatively expensive, and has problems such as poor stability and easy microbial degradation. Storage is very unfavorable. Therefore, the application of a polymer thickener can produce a forest fire extinguishing agent with good stability, high effective viscosity and storage resistance. The fire extinguishing agent has less loss in the air and less evaporation loss, high ground coverage, and high fire extinguishing efficiency. Increase.

Contents of the invention

The invention aims at the problem that the forest fire extinguishing agent will be seriously lost when it is sprayed in the air, and provides a forest fire extinguishing agent with good polymer thickening stability, high effective viscosity and storage resistance. The fire extinguishing agent has less floating loss and evaporation loss in the air, high ground coverage and high fire extinguishing performance.

The technical scheme of the present invention is that a preparation method of a polymer thickening forest fire extinguishing agent is composed of the following materials in weight percent: 75-100 parts of ammonium sulfate, 175-200 parts of urea, 0.5-1.5 parts of polymer thickener, water 475-550 copies. When preparing thickened forest fire extinguishing agent according to the formula of the present invention, it must be carried out according to the following feeding sequence: first dissolve ammonium sulfate and urea in water, dissolve the polymer thickener in water alone, and then mix and stir the two aqueous solutions for 0.5h-1h to Viscous.

The thickened forest fire extinguishing agent prepared by the present invention uses ammonium sulfate and urea as the main fire extinguishing agent, and its aqueous solution is neutral, which has no effect on some polymer thickeners sensitive to pH, and the addition of polymer thickeners can enhance fire extinguishing Due to the viscosity of the agent, large cloud droplets are formed during spraying, which greatly reduces the drift loss and evaporation loss of the fire extinguishing agent in the air, thereby greatly increasing the coverage on the ground and improving the fire extinguishing performance. The thickened forest fire extinguishing agent prepared by the present invention has the following advantages: the thickened fire extinguishing agent can improve the penetration ability from the crown of the tree to the surface combustibles, keep a longer retarding flame spread time, and can be used at a higher spraying height It is safer for fire fighters to spray.

detailed description

Embodiment 1: A method for preparing a polymer thickened forest fire extinguishing agent, which is prepared according to the following formula: 85 parts of ammonium sulfate, 190 parts of urea, 1 part of polyacrylamide, and 500 parts of water. Now dissolve ammonium sulfate and urea in water, and dissolve polyacrylamide in a small amount of water, then mix and stir the two aqueous solutions for 0.5h until viscous.

Embodiment 2: A method for preparing a polymer thickened forest fire extinguishing agent, which is prepared according to the following formula: 85 parts of ammonium sulfate, 190 parts of urea, 1 part of polyvinylpyrrolidone, and 500 parts of water. Now dissolve ammonium sulfate and urea in water, and dissolve polyvinylpyrrolidone in a small amount of water, then mix and stir the two aqueous solutions for 0.5h until viscous.

Specific embodiment three: a method for preparing a polymer thickened forest fire extinguishing agent, which is prepared according to the following formula: 85 parts of ammonium sulfate, 190 parts of urea, 1 part of polyethylene oxide, and 500 parts of water. Now dissolve ammonium sulfate and urea in water, and dissolve polyethylene oxide in a small amount of water, then mix and stir the two aqueous solutions for 0.5h until viscous.

Embodiment 4: A method for preparing a polymer thickened forest fire extinguishing agent, which is prepared according to the following formula: 85 parts of ammonium sulfate, 190 parts of urea, 1 part of modified paraffin resin, and 500 parts of water. Now dissolve the ammonium sulfate and urea in water, and dissolve the modified paraffin resin in a small amount of water, then mix and stir the two aqueous solutions for 0.5h until viscous.

The present invention is not limited to the above-mentioned embodiments, and all technical solutions that implement the present invention by using the same or similar methods and structures as the present invention shall fall within the protection scope of the present invention.

Claims (3)

1. the preparation method of a macromolecule thickening fire-extinguishing agent for forest, it is characterised in that each material weight percentage forms: ammonium sulfate 75-100 part, urea 175-200 part, macromolecule thickener 0.5-1.5 part, water 475-550 part.

A kind of preparation method of macromolecule thickening fire-extinguishing agent for forest, operating procedure in preparation process is as follows: first by soluble in water to ammonium sulfate and urea, macromolecule thickener is dissolved alone in water, and right latter two aqueous solution mix and blend 0.5h-1h is to thick.

The preparation method of a kind of macromolecule thickening fire-extinguishing agent for forest, it is characterised in that macromolecule thickener described in claim 1 is polyacrylamide, polyvinylpyrrolidone, polyethylene glycol oxide, modified paraffin resin.