Novel ABC dry powder fire-extinguishing agent and its making method

Abstract

The invention discloses a novel ABC dry powder fire-extinguishing agent and its making method. The novel ABC dry powder fire-extinguishing agent comprises the following components by weight percentage: 25-50 of sodium bicarbonate, 40-65 of aluminum potassium disulfate dodecahydrate (alum), and the balance auxiliary materials. The making method includes: crushing sodium bicarbonate into superfine powder of over 360 meshes, and crushing aluminum potassium disulfate dodecahydrate (alum) into fine powder of over 140 meshes; putting the crushed sodium bicarbonate and aluminum potassium disulfate dodecahydrate (alum) as well as the auxiliary materials into a blender and blending them evenly, and then putting the mixture into a reaction tank to undergo a silicification reaction. In the invention, aluminum potassium disulfate dodecahydrate (alum) is taken as the main fire-extinguishing component for type A fires. The aluminum potassium disulfate dodecahydrate (alum) can well realize film forming cooling rapidly on a type A combustible substance firing surface like traditional ammonium dihydrogen phosphate so as to achieve cooling and sealing, thus preventing deep combustible solid from gasifying into combustible vapor. The sodium bicarbonate is selected to strengthen the extinguishing ability on type B and C fires.

Description

technical field [0001] The invention belongs to a fire extinguishing agent, in particular to a novel dry powder fire extinguishing agent for extinguishing Class A, B, and C fires and a manufacturing method thereof. Background technique [0002] With the elimination of halon fire extinguishing agent, various scientific research institutes, enterprises, and colleges and universities engaged in fire technology research and application of new fire extinguishing equipment have continuously developed new fire extinguishing agents and equipment to replace halon fire extinguishing agents and equipment, ABC dry powder fire extinguishing agent Since it was popularized and applied in China in the 1980s, it has developed rapidly under the trend of eliminating halon fire extinguishing agents, and its production capacity has continued to expand. The traditional ABC dry powder fire extinguishing agent uses ammonium dihydrogen phosphate as the main fire extinguishing substance. At this time...

AI Technical Summary

Problems solved by technology

Ammonium dihydrogen phosphate has the effect of extinguishing class A, B, and C fires through the effects of these two aspects, but ammonium dihydrogen phosphate mainly has two defects. The ability to fire is not enough. Researchers engaged in the research of fire extinguishing agents know that sodium bicarbonate is recognized as a material with high fire extinguishing efficiency of Class B and C, but because of the alkalinity of sodium bicarbonate, it cannot be added to acidic ammonium dihydrogen phosphate.

Another defect of ammonium dihydrogen phosphate is that ammonium dihydrogen phosphate is the main fertilizer for plants, and the amount of crops is large. We use ammonium dihydrogen phosphate in fire extinguishing agents, which is equivalent to "robbing" fertilizers with farmers. With the current phosphorus With the increasingly scarce mineral resources, the raw materials of ammonium dihydrogen phosphate are becoming more and more expensive. This vicious circle also increases the material cost of fire extinguishing agents. Therefore, a cheap and effective fire extinguishing material is selected to replace the traditional ammonium dihydrogen phosphate. Whether it is in terms of economic benefits or in terms of rational allocation of mineral resources, it is of great significance

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