Method and apparatus for treating industrial waste water and urban waste water

Abstract

The invention belongs to the field of water treatment, in particular to sewage treatment equipment in the pulping process. The sewage treatment equipment of the present invention includes: TR1, TR2, TR3, TR4 online water treatment equipment units, pulp refining in the pulping process; primary and secondary pulp washing; bleaching and rinsing processes, using flocculation and mechanical filtration, precision Filtration and ultrafiltration devices carry out water treatment, and the desalination treatment equipment unit TR5 ensures the final desalination of circulating water. The water treatment process of the present invention is that after the flocculant is added to the sewage, the whole process is in the process of changing the fluid form, biochemical polymerization reaction and mechanical physical movement, and the pollution factors are rapidly flocculated and freed during the flow process, and the fine particles in the water can be removed. Particulate impurities form hydrophilic and insoluble large groups of substances that are easy to filter, and can dehydrate pollutants into dry matter. The invention has less equipment investment; the treated water is recycled; and no waste liquid is discharged. The invention can be applied to paper pulping, urban sewage and industrial sewage treatment, and has remarkable economic benefits.

Description

technical field [0001] The invention belongs to the field of water treatment, in particular to sewage treatment equipment in the pulping process. Background technique [0002] At present, the harm caused by the paper industry to environmental pollution is very obvious, especially in the pulp production link of paper production, due to the production processes such as cooking method and oxidation method, a large amount of waste water will be generated in the production process. Using traditional sewage treatment methods, the efficiency of sewage treatment is low; the investment and operation costs of water treatment equipment are large; the energy consumption is high, which has led many paper-making enterprises to secretly discharge production wastewater into rivers, rivers, and lakes, seriously polluting water resources and pollute the environment. In addition, most urban sewage in our country is directly discharged without effective treatment, and the resulting water pollu...

AI Technical Summary

Problems solved by technology

[0017] In a word, the above method still does not fundamentally solve the problem of sewage treatment.

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