Method for treating and recycling electrophoretic coating wastewater of new energy automobile

A new energy vehicle, electrophoretic coating technology, applied in waste paint treatment, multi-stage water treatment, water/sewage treatment and other directions, can solve the problems of polluted environment, low utilization rate of waste water, waste water cannot be reused, etc., to reduce pollution , the effect of saving resources and stable water quality

CN111470717AInactive Publication Date: 2020-07-31HENAN HENGAN ENVIRONMENTAL PROTECTION TECHCO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2020-07-31
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for treating and recycling electrophoretic coating wastewater of a new energy automobile. The method comprises the following steps: 1) phosphating wastewater treatment; 2) carrying out solid-liquid separation on the phosphatized sewage; 3) coating sewage treatment; 4) carrying out solid-liquid separation on the coating sewage; 5) tempering and adjusting the amountof wastewater; 6) performing hydrolytic acidification of the wastewater; 7) performing wastewater contact oxidation; 8) performing membrane biological reaction; 9) performing ultraviolet disinfectionand discharge; 10) sludge recycling: subjecting sludge entering the production sludge tank, the phosphatization sludge tank and the biochemical sludge tank to concentration by a first sludge concentration tank, a second sludge concentration tank and a third sludge concentration tank; feeding the concentrated sludge into a first chamber type filter press, a second chamber type filter press and a third chamber type filter press for filter pressing; according to the invention, the method has the advantages of reasonable design, good and stable treatment effect, great improvement of the repeated utilization rate of the wastewater, reduction of pollutant discharge, great resource saving, effective reduction of the pollution of the wastewater to the environment, stable water quality, and great social and economic benefits.
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Description

technical field

[0001] The invention relates to waste water treatment, in particular to a method for treating and recycling new energy automobile electrophoretic coating waste water. Background technique

[0002] New energy vehicle electrophoretic coating wastewater mainly comes from wastewater generated from pre-degreasing, degreasing, water washing, surface adjustment, phosphating, passivation, electrophoresis, pure water preparation and other treatment processes and domestic sewage in some factories. The components and concentrations of each wastewater are different. Due to the inadequacies in the structure of wastewater treatment equipment, existing wastewater treatment devices cannot achieve good results and cannot meet the requirements for wastewater reuse or discharge. Therefore, new energy The improvement and innovation of automotive electrophoretic coating wastewater treatment is imperative. Contents of the invention

[0003] In view of the above situation, in or...

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Embodiment Construction

[0017] The specific implementation of the present invention will be described in detail below in conjunction with the accompanying drawings and specific conditions.

[0018] In conjunction with the drawings, a new energy vehicle electrophoretic coating wastewater treatment and recycling method includes the following steps:

[0019] 1) Phosphating sewage treatment: Phosphating waste liquid enters the phosphating waste liquid pool 1, enters the phosphating waste water pool 2 through the outlet, and is discharged into the first coagulation reaction pool 3 together with the phosphating waste water. Lime milk is added to the reaction pool 3 so that the pH of the wastewater in the pool is 7-8, and 80-150 mg / L of polyaluminum chloride with a mass concentration of 10% and 1-2 mg / L with a mass concentration of 1‰- 2‰ polyacrylamide demulsifies, coagulates and flocculates the wastewater for 1 hour, and the treated wastewater enters the first inclined plate sedimentation tank 4;

[0020...