Environment-friendly coal-water slurry and its production method

Abstract

The invention relates to environment-friendly coal water slurry and a production method thereof. The environment-friendly coal water slurry comprises the following materials in parts by weight: 60-70 parts of bitumite, 20-40 parts of water, 3-10 parts of weathered coal water slurry with a dispersion effect and 0.05-1 part of a stabilizer, wherein the weathered coal water slurry with the dispersion effect comprises the following materials in parts by weight: 25-40 parts of weathered coal with humic acid content not less than 30%, 1-20 parts of industrial NaOH, 60-80 parts of water, 0.1-0.5 part of sorbitol polyethenoxy ether and 0.1-0.5 part of sodium benzenesulfonate; and the stabilizer comprises the following materials in parts by weight: 5-10 parts of industrial alkali waste, 30-80 parts of water and 0.1-5 parts of sodium carboxymethyl cellulose. The environment-friendly coal water slurry provided by the invention requires no additional dispersing agent, the oxidized ingredients, including rich humic acid, and the like, in the weathered coal, are fully utilized through different-quality blended coals, and a dispersing agent type coal water slurry additive is prepared according to an alkali neutralizing principle, so that the environment-friendly coal water slurry has an excellent flowing property and a sulfur fixation function and can solve the problem of higher production cost of the coal water slurry in the prior art.

Description

technical field [0001] The invention belongs to the technical field of coal chemical industry, and in particular relates to an environment-friendly coal-water slurry and a production method thereof. Background technique [0002] Coal-water slurry is a coal-based liquid fuel that emerged in the 1970s. It can be used as a furnace fuel or a raw material for syngas, and has the advantages of stable combustion and low pollution emissions. Coal water slurry is a mixture of coal powder with a certain particle size, water and a small amount of dispersant in a certain proportion. The production process of coal water slurry is that coal, water and dispersant are slurried in a ball mill. After reaching a certain particle size and viscosity requirements, a small amount of stabilizer is added to form a two-phase coal-water slurry, and then enters the storage tank for standby. On the basis of maintaining the original physical and chemical properties of coal, coal water slurry also has go...

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the problem that the existing coal-water slurry has high production cost and needs to add a certain amount of dispersant, and provides an environment-friendly coal-water slurry with low production cost and no need to add dispersant and its production method. Weathered coal is the main raw material dispersant, and industrial alkali slag is used as a stabilizer through modification. The production cost is low and the fluidity is good. The environment-friendly coal-water slurry does not produce hard precipitation after long-term storage, and is environmentally friendly and pollution-free.

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