Application of multi-component D-type dry powder extinguishing agent in extinguishing aluminum alkyl fire

Abstract

The invention discloses application of a multi-component D-type dry powder extinguishing agent in extinguishing aluminum alkyl fire. An aluminum alkyl fire extinguishing test is executed for multiple times according to a test model, test steps and a test requirement of the D-type Dry Powder Extinguishing Agent GA979-2012; rechecking is executed after the extinguishing agent is sprayed, and the extinguishing time is shorter than or equal to 2min; the surface temperature of aluminum alkyl subjected to extinguishing is reduced to be below 48 DEG C; residual reactants of the flamed-out aluminum alkyl and the extinguishing agent are turned over and stirred to ensure no after-combustion; the dry powder extinguishing agent cannot be exploded in water; (4) the extinguishing effect is lower than or equal to 28Kg / m<2>; the extinguishing success rate is 100 percent.

Description

technical field [0001] The invention belongs to the technical field of fire extinguishing agent application, and in particular relates to the application of a multi-component Class D dry powder fire extinguishing agent in extinguishing alkyl aluminum fires. Background technique [0002] Alkyl aluminum is a large class of metal aluminum organic compounds formed by the direct combination of alkyl and aluminum. General formula AlR3, RnAlX3-n or R3Al2X2 (R is alkyl, X is halo, n=1, 2, 3). Since the outer electron shell of the metal aluminum atom has three free electrons, three alkyl groups are required to provide electrons to bond with it, so the alkyl aluminum is also called trialkyl aluminum. Alkyl aluminums have a single structure and similar chemical properties. Chemicals can be used as catalysts for the polymerization of olefins and other unsaturated compounds, reducing agents and alkylating agents for transition metal complexes. They are mainly used in organic synthesis ...

AI Technical Summary

Problems solved by technology

[0006] At present, the main companies in China that claim to be able to extinguish alkyl aluminum fires are the American Ansu Company and the German Merima Company, as well as the domestic Zhejiang Yuan and several other manufacturers that use ultra-fine dry powder to extinguish fires. Tests, the effect is not satisfactory, they are still based on covered fire extinguishing, and the covered fire extinguishing agent is easy to burn through, and after the fire is extinguished, it will re-ignite after being stirred, and the reaction residue, some still have spontaneous combustion when it meets air, and it will also happen when it meets water. Explosive properties

[0007] In the prior art, the residue after fire extinguishing can only be stirred again after the fire is extinguished, and the burning speed is controlled artificially so that they are completely burned before the residue and waste can be disposed of.

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