Zero-discharge sewage treatment process in nano-powder industry

Abstract

The invention discloses a zero-discharge sewage treatment process in the nano-powder industry. The zero-discharge sewage treatment process comprises a flocculation tank, a sedimentation tank, an electrophoresis tank, a disc filter, a positive pressure ultrafiltration filter, a resin filtering tank, an RO (Reverse Osmosis) membrane filtering tank, a sea light membrane filter and an evaporator, the flocculation tank is used for flocculating and settling nano-powder in the sewage; then passing through a settling pond to obtain settled sludge and primary clear water; the primary clear water enters an electrophoresis pool to remove most of superfine powder, and then is filtered by a disc filter and a positive pressure ultrafiltration filter to obtain ultrafiltration clear water and ultrafiltration concentrated water; enabling the ultrafiltration clear water to pass through a resin filtering tank to obtain softened water; enabling the softened water to pass through an RO membrane filtering tank and a sea fresh water membrane filter to obtain purified water and concentrated water, and enabling the concentrated water to pass through an evaporator to obtain ultra-purified water; according to the zero-discharge sewage treatment process in the nano-powder industry, primary treatment is achieved through flocculation and sedimentation, solid waste and pure water which are completely separated are obtained through multi-stage filtration and concentration, and zero discharge of sewage is achieved.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and more particularly relates to a zero-discharge sewage treatment process in the nano-powder industry. Background technique [0002] Nano-powders are ultra-fine powders. Ultra-fine powders are produced in the preparation of ultra-fine powders or in some other industries. Ultra-fine powders are difficult to control on particle size and morphology, and are easily dispersed into air or water, causing Environmental pollution. In the prior art, the sewage treatment technology with ultrafine powder is not mature enough, and the treated sewage also contains more or less ultrafine powder, which causes secondary pollution to water bodies and the like. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to provide a zero-discharge sewage treatment process in the nano-powder industry, through flocculation and sedimentation, to achieve preliminary treatment, and then through multi-st...

AI Technical Summary

Problems solved by technology

[0002] Nanopowder is ultrafine powder, which will be produced in the preparation of ultrafine powder or in some other industries. Ultrafine powder is difficult to control the particle size and shape, and it is very easy to disperse into the air or water, causing environmental pollution

In the prior art, the sewage treatment technology with ultrafine powder is not mature enough, and the treated sewage still contains more or less ultrafine powder, which causes secondary pollution to water bodies, etc.

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