Catalytic chemical coolant for hot aerosol and preparation method thereof

Abstract

The invention relates to a catalytic coolant used in a hot aerosol fire extinguishing device and a processing technique of the catalytic coolant. As to the coolant, heat absorption cooling components mainly include manganese carbonate or manganese oxalate, manganese phosphate, potassium manganate, metal carbonate of a family I, a family II and a transition family, basic carbonate, oxalate and the like; a metal oxide or a hydroxide are adopted as a catalyst, an oxidant and a reinforcing filling; stearate, graphite and the like are adopted as a processing aid; composite solution of alkalis silicate and a water soluble polymer is adopted as an adhesive; and film materials such as hydroxymethyl or hydroxyethyl cellulose are adopted as a surface coating agent. The processing technique includes the steps of mould pressing, squeezing, pelletizing, coating and forming. Compared with the prior art, the catalytic coolant not only has high intensity and good cooling effect, but also can reduce secondary damage of an extinguishing agent and eliminate the content of poisonous gases in an extinguishing agent product so as to improve the environmental safety of the extinguishing agent.

Description

technical field [0001] The invention belongs to the technical field of gas fire extinguishing in fire protection technology, and relates to a coolant used for cooling hot aerosol fire extinguishing smoke and a preparation process thereof, in particular to a catalytic coolant with good cooling effect and a preparation process thereof. Background technique [0002] The hot aerosol fire extinguishing agent initiator is a kind of pyrotechnic agent. When it releases the hot aerosol fire extinguishing agent, it will undergo a strong combustion reaction and release a large amount of heat. In order to avoid the occurrence of secondary fires, the fire extinguishing agent must be cooled. In the prior art prior to the present invention, commonly used cooling methods include chemical internal cooling, chemical external cooling, physical external cooling using refrigerant or low-temperature source, physical external cooling using structural design, and physical external cooling using pure...

AI Technical Summary

Problems solved by technology

The downside of this coolant is that it produces toxic SO at high temperatures 2 Gas, unfriendly to the environment; low strength, poor vibration resistance, easy pulverization of the cooling cake; poor cooling effect; endothermic decomposition generates a large number of alkali metal compounds, which increases the secondary damage performance of the fire extinguishing agent

The disadvantages of this coolant are: the content of heat-absorbing cooling material is small, and the cooling effect is not good; the strength is low, the vibration resistance is poor, the coolant is easy to pulverize, and the blockage of the cooling channel is formed, which may cause fire when the fire extinguishing agent is released. Explosion hazard; nitrocellulose, plasticizer, stabilizer and other components are prone to produce CO and NO at high temperature X , NH 3 , HCN and other toxic gases; the water decomposed from a large amount of basic carbonate will form a viscous conductive liquid film on the protected object, causing secondary damage accidents

[0008] The above-mentioned coolants have their own characteristics, but none of them can ensure that they have comprehensive and excellent performance in terms of improving the fire extinguishing efficiency of fire extinguishing agents, controlling toxic gases, reducing secondary damage performance, and cooling effects.

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