Flame retardant extinguishing agent special for coal mine

Abstract

The invention discloses a flame-retardant fire extinguishing agent special for coal mines, which comprises distilled water, 0.5-5% propylene glycol, 67.5-76% superabsorbent resin, 5-9% potassium ferricyanide, 6- 11% melamine, 8-12% potassium bicarbonate, use oxalic acid or acetic acid to adjust the pH value to 6-8.5. After vacuum dehydration, the special flame retardant fire extinguishing agent for coal mines in the form of water-absorbing gel is obtained, which is mixed with water at a ratio of 1:1000-10000. The water-absorbent gel containing superabsorbent resin can form a gel-like product with the absorbed water, which has good water retention performance under high temperature conditions and has a considerable heat capacity. It can form a stable gel layer on the surface of the object, isolate the fire source from the air, prevent the spread of the fire, and achieve the fire extinguishing effect. Compared with ordinary water, the present invention has slower flow rate and higher viscosity, not only can reduce the surface temperature of coal, but also can penetrate into the inside of coal to cool down, prevent coal from re-igniting, and effectively improve the fire extinguishing effect.

Description

technical field [0001] The invention relates to a special flame retardant and fire extinguishing agent for coal mines, in particular to the fire prevention and fire extinguishing of coal in coal mines. Background technique [0002] Coal is the main energy source in my country. The natural conditions of my country's coal mines are poor and the geological conditions are complex. The mainland of China is formed by the convergence of many small plots in multiple episodes. The main coal fields have undergone multi-stage, multi-directional, and intensive transformations, resulting in The geological conditions of coalfields are complicated, and there are many associated disasters, among which, mines with coal seams that have the risk of spontaneous combustion account for half of them. Therefore, preventing coal seams is naturally a very important safety issue. [0003] Common fire extinguishing agents are water, foam, haloalkane, carbon dioxide, etc. Halon, carbon dioxide, inert g...

AI Technical Summary

Problems solved by technology

Halon, carbon dioxide, inert gas and other gas fire extinguishing agents are expensive, and it is difficult to exert their fire extinguishing efficiency in open spaces; dry powder fire extinguishing agents have higher fire extinguishing efficiency and fast fire extinguishing speed. However, the cooling effect on the combustion is small when the dry powder is extinguished. It basically does not have the function of covering and preventing combustion and evaporation. The surface of the coal pile is easy to cause re-ignition, and the interior of the coal pile basically does not play a role. The foam fire extinguishing agent has high fire extinguishing efficiency and fast fire extinguishing speed when applied to combustible liquid fires. However, it is low in efficiency, large in consumption and uneconomical for extinguishing coal spontaneous combustion fires;

[0004] In terms of safety technology for coal mine fire prevention and control, there is a fire prevention and extinguishing method of grouting and water injection, but this method has the problems of easy leakage of grouting water, large equipment investment and low sealing efficiency; Fire extinguishing method, but this method has the disadvantages of difficult operation and high cost