Preparation method and use method of dust explosion suppressor based on microbial capsule

Abstract

The invention discloses a preparation method and a use method of a dust explosion suppressor based on a microbial capsule, and belongs to the technical field of preparation of the dust explosion suppressor. The method includes the steps that firstly, carbonate mineralization bacteria is subjected to optimization culture, bacteria with high urease activity are selected to be prepared into hypopus spores, meanwhile, colloid bacillus hypopus spores are added, then a nutritional substrate, calcium chloride and urea are selected as core material filler, the double-strain spores and medium filler are mixed together, the mixture is subjected to extrusion forming through a pelletizer, and a core material component is formed. Porous diatomite is selected as a wall material, the core material component is adsorbed by the porous diatomite, and the micro-capsule is formed. The microbial capsule is spread in accumulated dust, the microbial capsule wall material is stressed and triggered to releasethe carbonate mineralization bacteria, urea is decomposed by the mineralization bacteria under the in-vivo urease effect, carbonate is generated, the carbonate is continuously chelated with calcium ions, and calcium carbonate is formed. The micro-capsule prepared with the method has a good explosion suppression effect, and environmental pollution can be reduced to a maximum degree.

Description

technical field [0001] The invention relates to the technical field of preparation of a dust explosion suppressor, in particular to a preparation method and a use method of a microbial capsule-based dust explosion suppressor. Background technique [0002] With the increasing amount of combustible powder processing in modern industrial production, various combustible powder processing procedures, especially the high-explosive coal dust generated in the coal mining process, are easy to accumulate and form a hazard source of dust explosion. Dust explosions have a wide range of damage and are likely to form secondary explosions. The degree of harm is higher than that of gas explosions. The hazards caused by local explosions caused by dust on the ground should be paid more attention to. The technical measures of explosion isolation and suppression are important means to cut off the accident chain of the development of such dangerous sources. [0003] At present, researchers in t...

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Problems solved by technology

[0003] At present, researchers in this field mainly prevent and isolate dust explosions by adding anti-explosion agents, etc., and suppress secondary explosions caused by dust explosions. Commonly used anti-explosion materials include halides, urea, silicon dioxide, bicarbonate Sodium, ammonium dihydrogen phosphate, calcium carbonate, etc. These anti-explosion materials can contain the explosion pressure and pressure rise rate of dust explosions to a certain extent. The particle size of high-explosive coal dust is generally less than 850 μm. The increase in the specific surface area of ​​dust particles will greatly enhance the chemical activity of combustible dust, and the explosion reaction speed will be faster. However, the anti-explosion agent of ordinary particles cannot isolate dust particles and air well. contact with the environment, it is impossible to form an effective physical isolation layer, and the absorption effect on free radicals is not ideal, which will inevitably lead to a greatly reduced explosion suppression effect, and some existing explosion suppression agent materials are likely to cause environmental pollution

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