Multi-cyclic treatment method for wool scouring wastewater

Abstract

The invention relates to a multi-cyclic treatment method for wool scouring wastewater; 0.02 to 0.08 weight percent of bleaching powder and 0.5 to 2 weight percent of quicklime are utilized as reagents to carry out chemical reactions of saponification, demulsification and coacervation on the wool scouring wastewater; through the steam heating and stirring and the current acceleration by the rotation of a central tower, the reagents and the wastewater are fully mixed and repeatedly circulated in a reaction vessel, the central tower and a treatment pool to accelerate the reaction speed; suspended substances in the wool scouring wastewater are rapidly precipitated; and the wastewater is subjected to precipitation by a first treatment pool, centrifugal water separation by the central tower andstatic precipitation and water separation by a precipitation pool to obtain a clear water without mud and odour. The used reagents have wide source and low prices; the treatment process is simple andeffective; equipment is simple and cheap; filtering equipment and separation equipment with complex structures and expensive prices are not needed; the treated water is totally recycled; and dry mud accumulated in a drying yard has no harmful substance and can be used as fertilizer or filling.

Description

[technical field] [0001] The invention relates to a sewage treatment method, in particular to a wool washing industrial sewage treatment method. [Background technique] [0002] Wool scouring wastewater is the wastewater generated during the initial processing and scouring of wool. It is characterized by a large amount of discharge, many components, and difficult treatment. Existing many documents disclose the various schemes of this sewage treatment, just have application number as the report of several documents such as 89104722.0, 89101457.8, 91104396.9, 01128062.X in Chinese patent. Looking at these schemes, they all focus on extracting lanolin as the main technical direction of sewage treatment, and there are problems such as complex structure, large investment, high operating cost, and poor sewage purification effect to varying degrees. Although some plans pay attention to the reuse of sewage after treatment, they cannot meet the requirement of no discharge of scouring...

AI Technical Summary

Problems solved by technology

Looking at these schemes, they all take the extraction of lanolin as the main technical direction of sewage treatment, and there are problems such as complex structure, large investment, high operating cost, and poor sewage purification effect to varying degrees.

Although some schemes pay attention to the reuse of sewage after treatment, they cannot meet the requirement of no discharge of scouring water. Therefore, it is rare to be widely used and achieve good results in practice.

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