Application of compound type D-class dry powder extinguishing agent in fire disaster of lithium metal and derivative thereof

A dry powder fire extinguishing agent, composite technology, applied in fire protection equipment and other directions, can solve the problems of poor operability, scarcity of fire extinguishing agent, poor fire extinguishing effect, etc., and achieve the effect of fast fire extinguishing speed

Active Publication Date: 2014-03-19
山东环绿康新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has poor operability and poor fire extinguishing effect
There are few domestic researches on lithium metal and i

Method used

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  • Application of compound type D-class dry powder extinguishing agent in fire disaster of lithium metal and derivative thereof
  • Application of compound type D-class dry powder extinguishing agent in fire disaster of lithium metal and derivative thereof
  • Application of compound type D-class dry powder extinguishing agent in fire disaster of lithium metal and derivative thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Raw material consumption

[0047]

[0048] The modified sodium chloride used is commercially available and is made of nano-SiO 2 Particles and surfactant F127 are coated with modified non-agglomerated sodium chloride particles, the core layer is sodium chloride particles with a particle size of 25-30 μm, and the coat layer is a coating material with a thickness of 5-200 nm; after modification, chlorine The monodispersity and fluidity of sodium chloride particles become better, the flow rate reaches 4-6mL / s, and the bulk density increases to 0.6-0.8g / cm 3 , decreased hygroscopicity. SEM, FT-IR, and hygroscopicity tests show that this preparation method improves the surface properties of NaCl particles, can effectively reduce its hygroscopicity and hard agglomeration, and improve fluidity and dispersion.

[0049] The ammonium polyphosphate used is commercially available, and the degree of polymerization n=1000 or more;

[0050] The hydrophobic silica used is commercia...

Embodiment 2

[0064] Raw material consumption

[0065]

[0066] All the other are with embodiment 1.

Embodiment 3

[0068] Raw material consumption

[0069]

[0070] All the other are with embodiment 1.

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Abstract

The invention relates to an application of a compound type D-class dry powder extinguishing agent in a fire disaster of lithium metal and a derivative thereof. An extinguishing test is carried out according to a test model, test steps and test requirements which are required by a GA979-2012 D-class dry powder extinguishing agent, and the extinguishing success ratio is 100%; the following parameters are inspected after spraying of the compound type D-class dry powder extinguishing agent is finished: the extinguishing time is less than 2 minutes, the extinguishing efficiency is less than 24 Kg/m<2>, and the temperature of the surfaces of the extinguished lithium metal and derivative thereof is measured to be reduced below 50 DEG C; after the spray is finished for one hour, reacted residues left after burning of the lithium metal and derivative thereof can not burn again by being overturned and stirred, so that the extinguishment can be confirmed to be successfully applied.

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 compound type D dry powder fire extinguishing agent in extinguishing metal lithium and its derivative fires. Background technique [0002] my country is rich in lithium ore resources. Based on the current production of lithium salts in my country, the mica lithium mine in Jiangxi alone can be exploited for hundreds of years. [0003] Lithium has high specific heat and electrical conductivity, and its density is 0.53g / cm 3 , The melting point is 180.54°C. The boiling point is 1317°C. It is the lightest metallic element in nature. It is a very active alkali metal element, and it is the only alkali metal element that can react with nitrogen at room temperature. Lithium that exists in nature consists of two stable isotopes 63Li and 73Li. Lithium can only be stored in paraffin or paraffin. [0004] In the metallurgical ...

Claims

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Application Information

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IPC IPC(8): A62D1/00
Inventor 许法山宋明韬王田美秦玉旺
Owner 山东环绿康新材料科技有限公司
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