A coating wastewater treatment device

Abstract

The invention relates to a paint wastewater treatment device. Raw water enters into a regulating tank, and the water in the regulating tank enters a pre-filter through a lift pump to be filtered and then enters a degassing and carbonization linkage device; The activated carbon tail gas treatment device is connected to the membrane module through a vacuum pump; the outlet of the carbonized membrane module is connected to the dosing pool a, and the waste water in the dosing pool a can enter the micro-electrolysis device through the pump a; the outlet of the micro-electrolysis device is connected to the dosing pool a Pool b, the wastewater in the dosing pool b enters the serpentine tube through the pump b for Fenton reaction; the outlet of the serpentine tube is connected to the dosing pool c, and the outlet of the dosing pool c is connected to the coagulation sedimentation tank; the coagulation The clear liquid in the upper part of the sedimentation tank enters the photocatalytic device through the pump c, the water outlet of the photocatalytic device is connected to the intermediate water tank, and the water in the intermediate water tank enters the enhanced filter through the pump d. The invention reduces the COD of paint wastewater, has simple device flow and long service life.

Description

Technical field: [0001] The invention relates to the field of waste water treatment devices, in particular to a paint waste water treatment device. Background technique: [0002] The main components of paint wastewater discharged by production enterprises are toluene, xylene, dicyclopentadiene, phthalic anhydride, maleic anhydride, butenedioic acid (cis, trans), methylal, acetal, ethanol, dimethyl ether, butylene Esters, hypophosphorous acid, etc., these. It often contains toxic and harmful substances such as phenols, benzenes and heavy metals (surface treatment), and the COD of the water produced by evaporation of paint wastewater is 4000-5000mg / L. pH = 4-12.5 range. Phenol is a chemical co-carcinogen, and if high-concentration phenol-containing wastewater is discharged into waters, aquatic organisms will be damaged. Pigments currently used in the paint industry also contain lead and chromium. Lead is currently the most widespread polluting element, and its harmful effe...

AI Technical Summary

Problems solved by technology

However, the process is lengthy, the equipment cannot fully play its role, the treatment cost is high, the discharge stability is poor, and the treatment effect needs to be improved.

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