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A kind of preparation method of inhibitor used for preventing coal spontaneous combustion

A technology of coal spontaneous combustion and chemical inhibitor, applied in the direction of preventing fire, dustproof, mining equipment, etc., can solve the problems of large fire danger, poor chemical resistance, increase water absorption, etc., to prevent coal spontaneous combustion fire, inhibit chemical Long life and increased effectiveness

Active Publication Date: 2019-03-26
广州发展燃料港口有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main technical problem to be solved by the present invention is to provide a kind of organic acid to increase the pore volume of pearlite in view of the disadvantages of traditional coal spontaneous combustion retardants such as poor inhibitory effect, short inhibitory life and high fire hazard. and the specific surface area, and then use microorganisms to corrode perlite to increase the porosity, then load hygroscopic chitosan, and then compound surfactants, guanidine sulfamic acid, etc. to prepare the method for preventing coal spontaneous combustion. Pearl stone is soaked and calcined with organic acid to increase the pore volume and specific surface area of ​​pearl stone, and then fermented with chitosan and domestic sewage, and microbes are used to corrode perlite to increase porosity and make chitosan containing active groups Loaded on perlite to increase water absorption and interrupt the coal oxidation reaction chain, then mix protein powder with sodium dodecylbenzene sulfonate and heat, and mix with modified perlite and guanidine sulfamate after cooling to prepare the base material , the protein film has excellent gas barrier properties, can isolate oxygen, and guanidine sulfamate can decompose and absorb heat and generate non-combustible gas, inhibit coal spontaneous combustion, and finally mix it with sodium silicate, xanthan gum, etc. to prevent Inhibitor for spontaneous combustion of coal, the inhibitor prepared by the invention has good inhibitory effect, high efficiency, long inhibitory life, no fire hazard, and good application prospect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0017] First, weigh 400g of pearlite and add it to the pulverizer to pulverize, and pass through an 80-mesh sieve. The sieved material is collected, and the sieved material is added to a beaker containing 15% citric acid solution. After soaking for 30 minutes, filter And collect the filter residue, move the filter residue into a muffle furnace, heat it to 450°C, take it out after heat preservation and calcination for 1 hour, to obtain the pretreated perlite; then the above pretreated perlite, chitosan and domestic sewage according to the mass ratio of 1:2 : Add 15 to the beaker, seal the beaker with a plastic film, and move the beaker to a cool place for 10 days to ferment the microorganisms in the domestic sewage. After the fermentation is over, move the fermentation product into the sterilization box and control the temperature of the sterilization box. Sterilize at 95°C for 15 minutes at high temperature, transfer the sterilized materials into a centrifuge, centrifuge at 4000...

example 2

[0020] First, weigh 450g of pearlite and add it to the pulverizer to pulverize, pass through a 90-mesh sieve, collect the sieved material, and add the sieved material to a beaker containing a 15% citric acid solution. After soaking for 35 minutes, filter And collect the filter residue, move the filter residue into the muffle furnace, heat it to 500°C, take it out after heat preservation and calcination for 1 hour, to obtain the pretreated pearlite; then the above-mentioned pretreated pearlite, chitosan and domestic sewage are in a mass ratio of 1:2 : Add 15 to the beaker, seal the beaker with plastic film, and move the beaker to a cool place for 13 days to ferment the microorganisms in the domestic sewage. After the fermentation is over, move the fermentation product into the sterilization box and control the temperature of the sterilization box. Sterilize at 98°C for 18 minutes at a high temperature, transfer the sterilized materials into a centrifuge, centrifuge at 4500r / min f...

example 3

[0023] First, weigh 500g of pearlite and add it to the pulverizer to pulverize, and pass it through a 100-mesh sieve. The sieved material is collected, and the sieved material is added to a beaker containing a 15% mass fraction of citric acid solution. After soaking for 40 minutes, filter And collect the filter residue, move the filter residue into the muffle furnace, heat it to 550℃, heat it for 2 hours and take it out to obtain the pretreated perlite; then, the above pretreated perlite, chitosan and domestic sewage according to the mass ratio of 1:2 : Add 15 to the beaker, seal the beaker with plastic film, and move the beaker to a cool place for 15 days to ferment the microorganisms in the domestic sewage. After the fermentation is over, move the fermentation product into the sterilization box, and control the temperature of the sterilization box. Sterilize at a high temperature at 100°C for 20 minutes, move the sterilized materials into a centrifuge, centrifuge at 5000r / min ...

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Abstract

The invention discloses a preparation method of a retardant for preventing coal spontaneous combustion and belongs to the technical field of retardant preparation. Firstly, perlite is soaked in organic acid and calcined, and the pore volume and specific surface area of the perlite are increased; then the perlite is mixed with chitosan and domestic sewage and fermented; the perlite is corroded by microorganisms to increase the porosity; the chitosan containing active groups is loaded on the perlite; a coal oxidation reaction chain is interrupted while the water absorption amount is increased; then protein powder, sodium dodecyl benzene sulfonate and the like are mixed and heated and mixed with modified perlite and sulphamic acid guanidine after cooling, a base material is prepared, wherein a protein film has the excellent gas barrier property and can isolate oxygen, and the sulphamic acid guanidine can be decomposed and adsorb heat and produce noncombustible gas to restrain coal spontaneous combustion; and finally, the base material is mixed with sodium silicate, xanthan gum and the like, discharging is conducted, and the retardant for preventing coal spontaneous combustion is obtained. According to the retardant prepared by the preparation method, the effect is good, the efficiency is high, the retardance life is long, no fire hazard exists, and good using prospects are achieved.

Description

Technical field [0001] The invention discloses a preparation method of an inhibitor for preventing spontaneous combustion of coal, and belongs to the technical field of inhibitor preparation. Background technique [0002] Spontaneous combustion of coal is one of the major disasters in coal mines. Among the key state-owned coal mines in my country, the mines with serious coal spontaneous combustion accounted for 56% of the total number of mines, and the fires caused by the spontaneous combustion of coal accounted for 90-94% of the total number of mine fires. Spontaneous combustion of coal seriously threatens the safe production of coal mines, and may also cause gas explosions, causing heavy casualties, and destroying resources and equipment, causing heavy economic losses. [0003] The main principle of preventing coal spontaneous combustion is to prevent the occurrence of coal oxidation process and eliminate heat accumulation. Existing inhibitors for preventing spontaneous combust...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F5/06C09K21/00
CPCC09K21/00E21F5/06
Inventor 王维孙冬林晨
Owner 广州发展燃料港口有限公司
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