The structure of the liquid carbon dioxide storage tank
The liquid carbon dioxide storage tank is a double-layer fixed vacuum powder insulation storage tank. The inner liner material is 16MnDR, and the outer liner material is Q235R. The design pressure is 22 kilograms.
The principle of using liquid carbon dioxide in fire suppression systems
Liquid carbon dioxide storage tanks can be used in mine fire suppression systems. They can prevent coal from burning because of the inherent properties of liquid carbon dioxide. It can adhere to the surface of coal. And when coal has the property of adsorbing other gases, it can significantly slow down the oxidation reaction rate of coal. Therefore, it can effectively prevent coal from burning.
In addition, compared with other gases, carbon dioxide is an inert gas and is relatively stable. After it adsorbs onto the coal, it will reduce the amount of oxygen adsorbed on the coal surface, thereby effectively slowing down the rate of coal oxidation reaction.
Advantages of liquid carbon dioxide storage tanks
Liquid carbon dioxide storage tanks can store a large amount of LCO2 and can be transported through pipelines or cylinders. Depending on the specific characteristics of liquid carbon dioxide, during use, it can have the effect of absorbing heat and cooling. Compared with other types of fire extinguishing materials, its temperature is relatively low. During use, it will absorb a large amount of heat, thereby effectively reducing the temperature of the surrounding air and achieving the purpose of extinguishing the fire. If the temperature is too high and cannot be oxidized, the heating rate will be too fast. However, the presence of LCO2 in the liquid carbon dioxide storage tank can reduce the temperature to a certain extent, effectively avoiding this situation. When the staff put carbon dioxide in the area where a fire occurs, it can effectively absorb the surrounding heat and then inhibit the spread of the fire.
The liquid carbon dioxide storage tank, with its reliable “double-layer vacuum insulation” structure, can safely store a large amount of LCO2. The core of its fire suppression mechanism lies in the “adsorption oxygen isolation + inert suppression + heat absorption cooling” triple process: first, the adsorption effect is used to cover the coal surface and reduce the oxygen concentration; then, an inert atmosphere is used to block the oxidation chain; finally, through vaporization and heat absorption, it rapidly cools down, simultaneously weakening the three elements of combustion, achieving rapid, residue-free, and low-damage mine fire prevention and suppression.
