Novel composite gas explosion suppressant

Abstract

The invention relates to a novel composite gas explosion suppressant which is composed of inorganic filler, a porous mineral material and inorganic phosphorus substances. The components are crushed, uniformly mixed and dried to obtain the gas explosion suppressant. The porous mineral material composite explosion suppressant prepared by the invention has the advantages of fine and uniform texture,low cost, low moisture absorption, high-efficiency explosion suppression, and easiness in industrial production, and can be applied to the field of gas explosion suppression.

Description

technical field [0001] The invention relates to a composite explosion suppression material and a preparation method thereof. Background technique [0002] Gas explosion is one of the major disasters in coal mining, industrial production and daily life, which seriously affects the safety of production efficiency and the safety of workers. The gas explosion mechanism is mainly chain reaction mechanism and thermal explosion theory. The thermal explosion theory holds that the combustible gas undergoes a chemical reaction at a certain speed after being subjected to high temperature, and releases a large amount of combustion heat to increase the temperature of the system. High, the positive coupling between temperature and reaction rate can aggravate the explosive reaction. At the same time, the heat release rate has a nonlinear exponential relationship with the temperature, while the heat loss rate has an approximately linear relationship with the temperature. The heat release ...

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Problems solved by technology

[0003] Most of the currently used antiknock agents are single-component powders, such as silica nano-powders, carbonate powders, and phosphate powders. Considering their high production costs, easy moisture absorption and caking, and fluidity And the disadvantage of poor dispersion, can not meet a large number of industrial production needs

Cheng Fangming and others found that SiO with a mass concentration of 0.1g / L and a particle size of 50nm 2 The powder can reduce the maximum explosion pressure of the gas-air mixture (gas volume fraction is 7%) by an average of 70%, and the average reduction of the maximum pressure rise rate by 90%, and the explosion suppression effect on higher gas concentrations is not obvious , and the price of silica is 135 yuan / 500g, which is relatively expensive

Yu Minggao et al. showed that the modified red mud powder with a mass concentration of 0.15g / L can reduce the maximum explosion pressure of methane-air premixed gas (9.5% gas volume fraction) by an average of 30%. Wang Yan et al. The use of sodium bicarbonate-red mud powder with a concentration of 0.10g / L can reduce the maximum explosion pressure of methane-air premixed gas (9.5% gas volume fraction) by 44.9%, and the average decrease in the maximum pressure rise rate is about It is 96.3%, but the modification process of red mud powder is complicated, and it is difficult to put it into mass production

Studies by Wang Qiuhong and others have shown that aluminum hydroxide powder with a mass concentration of 0.25g / L can reduce the maximum explosion pressure of gas-methane mixture gas (gas volume fraction 9.5%) by an average of 11.08%, and the average reduction of the maximum pressure rise rate The amplitude is 66.15%, and the suppression effect is poor

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