Process for improving efficiency of pretreating coating sewage

Abstract

The invention discloses a process capable of improving the pretreatment efficiency of painting sewage. The degreasing waste liquid enters the degreasing waste liquid pool, the electrophoresis waste liquid enters the electrophoresis waste liquid pool, and the spray paint waste water enters the spray paint waste water pool, and the pumps are limitedly lifted to enter the painting process respectively. In the wastewater conditioning tank, under the action of mechanical stirring, the wastewater undergoes pH adjustment, flocculation, and coagulation-assisted reactions. After pH adjustment, flocculation, and coagulation-assisted reactions, the wastewater flows out of the reactor and flows into the sedimentation tank for solid-liquid separation, and the solids enter the sludge tank. , Wastewater in the air flotation device, the flocs in the water are combined with a large number of fine air bubbles released by the air flotation dissolved air water, use the buoyancy to rise, float on the water surface, and the scraped scum flows into the sludge tank, after pretreatment, the metal ions are removed and other pollutants in the water flow into the comprehensive wastewater regulating tank for further treatment. This process makes the sewage treatment efficiency high, the internal impurities are cleaned, and the environment safety is guaranteed.

Description

technical field [0001] The invention relates to a process, in particular to a process capable of improving the pretreatment efficiency of coating sewage. Background technique [0002] Sewage, usually refers to certain polluted discharge water from domestic and production. Sewage mainly includes domestic sewage, industrial wastewater and initial rainwater. The main pollutants of sewage are pathogenic pollutants, oxygen-consuming pollutants, plant nutrients and toxic pollutants. From the viewpoint of the source of sewage, sewage can be defined as waste-carrying liquid or water discharged from residential, institutional, commercial or industrial areas mixed with groundwater, surface water, snowstorms, etc. There are many types of sewage, and correspondingly there are many technologies and processes to reduce the impact of sewage on the environment. According to the source of sewage, sewage can be divided into these four categories. The first category: Industrial wastewater ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problem that the above-mentioned existing sewage contains many toxic substances, its treatment is not clean, and the treatment efficiency is low, causing environmental pollution after discharge, and a process that can improve the efficiency of coating sewage pretreatment is designed , this process makes the sewage treatment efficiency high, the internal impurities are cleaned, and the environmental safety is guaranteed. It solves the problem that the existing sewage con