Sq Extinguishing Agent Is In The Automatic Fire Extinguishing System In Applied Research

In this dissertation, the key technologies studied are related to engineering application of SQ aerosol extinguishant. The main contents and conclusions are as follows:(1) The influences of the reactor structure, the initial temperature of SQ aerosol extinguishant, the loading density and additives on combustion rate are studied systematically. It is shown that the reactor contributes to increasing combustion rate of SQ aerosol extinguishant, which has low calorific capacity and the cone on the bottom; the higher initial temperature of SQ aerosol extinguishant and lower loading density are, the faster SQ aerosol extinguishant burn; a small quantity of additive can improve combustion rate of SQ aerosol extinguishant in a certain degree.(2) Three factors are discussed systematically, which influence ignition rate of SQ aerosol extinguishant. The factors include the weight of igniting agent, the shape of igniter and amount of igniter. Based on experiments, it is shown that heavy and straight igniter conduces to enhancing ignition rate of SQ aerosol extinguishant; Not only the igniting efficiency but size and structure of reactor as well as fire power should be considered when amount of igniter is calculated.(3) Aerosol at high temperature has to be cooled before outlet. Then according to the characters of auto-fire-extinguishing equipment, a chemistry-physical cooling method is selected to lower high temperature of aerosol. And factors are discussed which affect capacity of cooling ball. These factors include specific surface area of cooling ball, coolant content and ratio between cooling ball and extinguishant. It is concluded that high coolant content, big specific surface area and high ratio can improve the ability of cooling ball.(4) Clean and nonpoisonous aerosol is obtained by means of designing extinguishant, removing liquid products and filtering aerosol.(5) Equipment must be insulated against heat because its surface has high temperature. Based on experiments, the problem is solved by selecting appropriate kind and thickness of insulating material. The maximum surface temperature of equipment is less than 60 .The resolved key technologies above-mentioned in this dissertation are the base of engineering application for SQ aerosol extinguishant.