Tailing mud water treatment method for wet coal preparation plant

Abstract

The invention discloses a tailing mud water treatment method for a wet coal preparation plant. A two-stage concentration and two-stage recycling method for tailing mud water is involved in the method, and the method comprises the following steps: acquiring a hardness value of the tailing mud water; when the hardness value of the tailing mud water is lower than a first threshold value, adding a flocculating agent into a first-stage concentrator; acquiring an overflow concentration value of a first-stage concentrator; when the overflow concentration value of the first-stage concentrator is higher than a second threshold value, adding the flocculating agent into the first-stage concentrator; when the overflow concentration value of the first-stage concentrator is not higher than the second threshold value, reusing the overflow of the first-stage concentrator as circulating water. According to the method, the charging rate of a sedimentation-filtration centrifugal dehydrator can be maximally increased, the charging rate of a tailing mud filter press and the charging rate of the second-stage concentrator can be correspondingly decreased, and the aims of reducing the factory construction investment, improving the tailing mud recycling efficiency and saving coal and water resources can be fulfilled.

Description

technical field [0001] The invention belongs to the technical field of tailing coal slime water treatment of wet coal preparation plants, and in particular relates to a tailing coal slime water treatment method of wet coal preparation plants. Background technique [0002] Tailing coal slime water treatment is one of the long-standing production technical problems in my country's wet coal preparation plants. The traditional single-stage concentration and single-stage recovery process leads to a high concentration of washing water in the coal preparation plant, and a large amount of tailing coal slime water is discharged, causing coal And serious waste of water resources and serious damage to the environment; in addition, when the content of fine particles in the tailing coal slime is high, the load of the tailing coal filter press will increase, the filter press cycle will be long, the moisture content of the filter cake will be high, and the capital investment will be high. ...

AI Technical Summary

Problems solved by technology

[0002] Tailing coal slime water treatment is one of the long-standing production technical problems in my country's wet coal preparation plants. The traditional single-stage concentration and single-stage recovery process leads to a high concentration of washing water in the coal preparation plant, and a large amount of tailing coal slime water is discharged, causing coal And serious waste of water resources and serious damage to the environment; in addition, when the content of fine particles in the tailing coal slime is high, the load of the tailing coal filter press will increase, the filter press cycle will be long, the moisture content of the filter cake will be high, and the capital investment will be high

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