Capsule fire preventing and extinguishing material for coal bed fire and preparation method thereof

Abstract

The invention discloses a capsule fire preventing and extinguishing material for a coal bed fire and a preparation method of the capsule fire preventing and extinguishing material. The fire preventing and extinguishing material comprises a core material and a coating layer with which the outer side of the core material is coated. The core material is prepared from a powder stopping agent which is the mixed powder stopping agent comprising ammonium carbonate, ammonium dihydrogen phosphate, ammonium chloride, diammonium hydrogen phosphate and calcium chloride. The coating layer is prepared from an organic polymer which is melamine formaldehyde resin. The core material is coated with the coating layer through a water bath drying method. The mass fraction ratio of ammonium bicarbonate to ammonium dihydrogen phosphate to ammonium chloride to diammonium hydrogen phosphate to calcium chloride to melamine formaldehyde resin is 24-27:10-11:18-20:9-10:6-7:25-33:0.5. The capsule fire preventing and extinguishing material has the advantages of being nontoxic, free of pollution, convenient to store, capable of evenly covering a fire area, short in fire extinguishing period and good in effect, having the leakage stoppage, oxygen isolation, cooling and inhibition effects, being convenient to use and convenient and fast to operate and the like.

Description

technical field [0001] The invention relates to the technical field of coal mine fire prevention and extinguishing, in particular to a capsule fire prevention material for coal seam fires and a preparation method thereof. Background technique [0002] Coal mine fire is one of the important disasters that affect the safety of coal mine production. The commonly used fire extinguishing methods include grouting yellow mud fire extinguishing system, grouting glue injection fire extinguishing system, inert gas fire extinguishing, foam fire extinguishing, powder inerting inhibitor fire extinguishing, etc. They are all There are respective shortcomings. Grouting is based on quantity, but there will be some places that are difficult to be covered, and some places cannot be used due to restrictions; when grouting, a large amount of water is injected into the underground, which pollutes the environment and greatly increases the workload and resources of mine drainage and sewage dischar...

AI Technical Summary

Problems solved by technology

Inhibitor (CaCl 2 , MgCl 2 , NaCl 2 etc.) It is difficult to enter the problematic area, the water absorption of the material itself is very small, and it cannot withstand high temperature evaporation in the goaf, the actual effect is limited, and the pollution of mine water is serious

The powdery inertization inhibitor technology has better fire prevention and extinguishing effect, but the deliquescence of powdery materials is not easy to store (for example, at room temperature, diammonium hydrogen phosphate releases ammonia in humid air), and it is not easy to disperse evenly in the coal body, so it is difficult to Give full play to its anti-fire performance, if it is injected into the coal body with its aqueous solution, it will be easily lost

At present, the base material water glass and coagulant (ammonium bicarbonate, sodium metaaluminate, etc.) are mixed with water to form a gel for fire prevention and use, but ammonium bicarbonate will precipitate a large amount of ammonia gas when it is gelled, resulting in a bad working environment And affect the work and health of the down-and-out workers

At the same time, this kind of gel can easily damage the eyes and skin of workers if it is accidentally touched during operation; the gel is formulated with sodium metaaluminate, which requires high operating requirements, is not easily soluble in water, has high stirring intensity, and is corrosive to human health. some damage

The process of the above two gel transaction processes requires two sets of equipment to work at the same time (Jiliaohe coagulant needs to be proportioned separately), which is inconvenient to operate and requires many people.

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