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Inhibitor for suppressing spontaneous combustion during storage of upgraded lignite and method for its preparation and use

An inhibitor, lignite technology, used in fuels, mining equipment, earth-moving drilling, etc., can solve the problems of heat generation, spontaneous combustion, high tendency to spontaneous combustion, easy to break and oxidize, etc., to block the entry of oxygen, inhibit low-temperature oxidation, reduce The effect of spontaneous combustion probability

Active Publication Date: 2021-08-10
CHINA UNIV OF MINING & TECH
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Problems solved by technology

[0002] my country has abundant reserves of lignite resources. Lignite has a short coal-forming time, low degree of coalification, high volatile matter, and poor thermal stability. quality decline
However, lignite has a low degree of deterioration, strong chemical activity, poor thermal stability, and is easily broken and oxidized when exposed to the air. quality coal

Method used

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Embodiment Construction

[0024] The specific embodiment and working process of the present invention will be further described below.

[0025] The invention provides an inhibitor for inhibiting spontaneous combustion during storage of upgraded lignite and a use method thereof.

[0026] An inhibitor for inhibiting spontaneous combustion during storage of upgraded lignite, comprising component A and component B.

[0027] Component A includes water as a solvent and a binder as a solute, a compounded inhibitory component, an antioxidant and a dispersant, and the mass percentage concentration of the binder is 45% to 65%, and the mass percentage concentration of the compounded inhibitory component is 7%~11%, the mass percentage concentration of antioxidant is 2%~4%, and the mass percentage concentration of dispersant is 1%~2%. Adhesive is polyvinyl alcohol. The compound inhibitory component is compounded by calcium magnesium component and ammonium component according to the mass ratio (0.2~3):1, and the c...

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Abstract

The invention discloses a preparation and application method of a novel inhibitor for inhibiting spontaneous combustion in the storage process of upgraded lignite. The inhibitor includes component A and component B. Component A includes water and binder, compound inhibitor component, antioxidant and dispersant, and the mass percentage concentration of each component is: binder 45%~65%, compound inhibitor component 7%~11% , antioxidant 2%~4%, dispersant 1%~2%. Component B includes water, a coagulant accelerator and a foaming agent, and the mass percentage concentrations of the coagulant accelerator and the foaming agent are 3%~5% and 3%~8% respectively. During use, component A and component B are diluted 20-25 times with water respectively to obtain dilution A and dilution B. Spray part of the dilution A evenly on the upper 1 / 3 outer surface of the coal pile. Quickly mix dilution A and dilution B according to the volume ratio of (1~1.8):1, beat into foam and spread evenly on the lower 2 / 3 outer surface of the upgraded lignite to form a dense oxygen barrier layer. The invention has the advantages of simple configuration, convenient operation, good barrier effect and the like.

Description

technical field [0001] The invention relates to an inhibitor for inhibiting spontaneous combustion in the storage process of upgraded lignite and a preparation and use method thereof, belonging to the technical field of coal spontaneous combustion prevention and control. Background technique [0002] my country has abundant reserves of lignite resources. Lignite has a short coal-forming time, low degree of coalification, high volatile matter, and poor thermal stability. quality decline. However, lignite has a low degree of deterioration, strong chemical activity, poor thermal stability, and is easily broken and oxidized when exposed to the air. quality coal. After the lignite is upgraded, the water content decreases, and the active functional groups inside the coal are exposed on the surface, making it easier for low-temperature oxidation reactions to occur. At the same time, due to the increase in the calorific value of the upgraded lignite, the coal pile is more prone to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F5/06C10L9/10
CPCC10L9/10C10L2230/08C10L2230/14
Inventor 孟献梁褚睿智吴国光俞时李晓苗真勇
Owner CHINA UNIV OF MINING & TECH
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