Recycling system and method of electroplating pretreatment sewage

Abstract

The invention discloses a recycling system and method of electroplating pretreatment sewage. The system comprises an electroplating pretreatment device, a collecting pool, a vibration membrane ultrafiltration device and a moderate pool, wherein the vibration membrane ultrafiltration device comprises a casing and a membrane unit and a motor which are installed in the casing; and the membrane unit is provided with a center transmission rod which downwardly stretches, thus an eccentric block on the center transmission rod is driven by the motor through a belt to rotate, so that a generated centrifugal force can trigger swing, and energy generated by swing promotes the membrane unit to vibrate through the center transmission rod, thus the silting problem of a membrane in the membrane unit is effectively solved, the capacity of resisting membrane pollution is stronger, sewage is simply and effectively treated, and treatment effect is better; the electroplating pretreatment device, the collecting pool and the moderate pool are coordinated and utilized to constitute a sewage recycling system so as to persistently and effectively separate out a clear liquid and a concentrated liquid; and the clear liquid is input into the moderate pool, subjected to oil removal and then recycled to the electroplating pretreatment device, thereby reducing water use amount and oil-removing powder use amount and achieving the purpose of reducing emission and reducing wastes.

Description

technical field [0001] The invention relates to the technology in the field of sewage treatment equipment, in particular to a system and method for recycling sewage before electroplating treatment. Background technique [0002] CODcr in the electroplating pretreatment process has a great relationship with the product type and process route of the electroplating enterprise. The workpiece must be surface decorated (such as polishing, rolling, embossing, etc.) before electroplating, and then dewaxed, degreased, pickled and activated, etc., to provide a clean surface for the subsequent electroplating process. The emulsification dewaxing and degreasing process adopted by the electroplating plant contains a large amount of nonionic surfactants, anionic surfactants and other additives (such as corrosion inhibitors) in its wastewater. Organic pollutants, and the wax and oil on the surface of the workpiece during the production process are emulsified and then enter the working mothe...

AI Technical Summary

Problems solved by technology

[0006] In view of this, the present invention aims at the deficiencies in the prior art, and its main purpose is to provide a system and method for recycling sewage before electroplating, which can effectively solve the problem of using existing equipment and methods that cannot be used for pretreatment of electroplating simply and effectively. Wastewater is recycled and treated, and the treatment effect is not good

Images