Multi-stage purification treatment process for industrial wastewater

Abstract

The invention relates to a multi-stage purification treatment process forindustrial wastewater, and concretely relates to an industrial wastewater purification treatment system. The system comprises a purification tank, a flocculation stirring mechanism and a swing air flotation device. By means of the system, flocculation purification, air flotation separation and scum cleaning can be sequentially completed in the flocculation area, the air flotation area and the separation area in the industrial wastewater treatment process, so that multi-stage purification treatment of industrial wastewater is achieved; and improvement design is specially conducted aiming at traditional air flotation equipment, so the problem that the final air flotation separation efficiency and the purification treatment effect are affected due to the fact that the binding rates of air bubbles and impurities in wastewater in different areas are different due to uneven dispersion of the air bubbles in the traditional industrial wastewater treatment process adopting an air flotation method is solved. And meanwhile, the problems that the floating rate of scum after air flotation separation is greatly reduced and the purification effect is greatly reduced due to the fact that air holes are easily blocked are solved.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, and specifically proposes a multi-stage purification treatment process for industrial wastewater. Background technique [0002] As the name suggests, industrial wastewater refers to the wastewater generated during industrial production. In industrial production, some wastewater containing high concentrations of industrial production components will be concentrated and recycled, while the other part has low concentrations and toxic and harmful substances. The content is lower than the standard The following wastewater will be discharged after purification treatment; due to the complex composition of industrial wastewater and the difficulty of treatment, multi-stage purification treatment is often used for treatment, and the treatment methods include air flotation, coagulation, and ion exchange. and adsorption, etc. [0003] Among them, the air flotation method is an efficient treatme...

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Problems solved by technology

[0004] 1) Because the ventilation structure is a fixed structure, the bubbles discharged from the pores are unevenly dispersed in the entire wastewater area. Due to the difference in the distribution of the bubbles, the binding rate of impurities in different areas is different, which affects the final Excellent air flotation separation efficiency and purification treatment effect;

[0005] 2) Because the ventilation structure is a static structure, it is easy to block the pores during the long-term wastewater purification process, which will cause the entire air flotation equipment to fail to work normally, and then cause the scum floating rate after air flotation to be greatly reduced. Makes the purification effect greatly reduced

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