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Chemical fire retartant for preventing controlling coil mineral well coal self-igniting

A chemical inhibitor and coal spontaneous combustion technology, applied in dust prevention, mining equipment, fire prevention, etc., can solve the problems of no theoretical basis, short time of anti-oxidant action, poor effect, etc., so as to reduce the tendency of spontaneous combustion and facilitate the acquisition of materials Economical and easy to operate

Active Publication Date: 2007-07-18
CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD
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AI Technical Summary

Problems solved by technology

However, foods are generally protein and fat substances, which are quite different from coal in their physical and chemical structures. At the same time, antioxidants are also easy to oxidize, and the time of antioxidant action is short, while the low-temperature oxidation of spontaneous combustion of coal takes dozens of days or even months. process, so the use of antioxidants as coal spontaneous combustion retardants also has many shortcomings, there is no theoretical basis, and the effect is poor

Method used

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Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0021] Weigh the surfactant sodium dodecylbenzene sulfonate, the primary oxidant potassium permanganate, and the polymer water-absorbent resin with 500 times the water absorption capacity and dissolve them in water to make the concentration of 0.8%, 0.5%, and 0.1% respectively. The mixed solution is a total of 2000 milliliters of chemical inhibitor, adding sulfuric acid to adjust the pH of the solution to be 4, selecting 500 grams of sample coal that is easy to spontaneously combust, and spraying the configured chemical inhibitor on the coal body to completely wet the coal body. The sample coal before and after treatment was analyzed, and the results are as follows:

[0022] (1) Utilize the resistivity measuring method of CO generation to measure the resistivity to reach 93%;

[0023] (2) Using infrared spectroscopy to analyze the change of coal structure before and after chemical inhibition, it is found that some functional groups that are easy to oxidize no longer exist, and...

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Abstract

The present invention discloses one kind of chemical inhibitor for preventing and controlling the self combination of coal in coal mine. The chemical inhibitor is water solution of pH 3-5 and comprising surfactant in 0.5-1 wt%, polymer resin in 0.1 wt% and oxidant in certain concentration. During coal mining, water is injected to the coal bed, and the chemical inhibitor is spread to the residual coal and other easy-to-fire areas alone or after being mixed to other fire extinguishing material. The chemical inhibitor makes the different active structural radicals in coal body oxidized irreversibly to lose low temperature oxidation activity and lower the self combustion tendency of coal to avoid self combustion of coal completely. The present invention is simple, low in cost and suitable for coal mine operation.

Description

technical field [0001] The invention relates to a chemical inhibitor for preventing spontaneous combustion of coal in coal mines, in particular to a chemical inhibitor for preventing spontaneous combustion of coal in coal mines. Background technique [0002] Coal spontaneous combustion is one of the major disasters in coal mines. Among the key state-owned coal mines in our country, mines with serious coal spontaneous combustion account for 56% of the total number of mines, and fires caused by coal spontaneous combustion account for 90-94% of the total number of mine fires. Coal spontaneous combustion seriously threatens the safe production of coal mines, and may also cause gas explosions causing heavy casualties, damage to resource equipment and causing major economic losses. [0003] The main principle of preventing coal spontaneous combustion is to prevent the occurrence of coal oxidation process and eliminate heat accumulation. Physical type inhibitors are mainly inorga...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F5/06
Inventor 陆伟奚志林王长元姬建虎
Owner CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD
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