Pure water system for electroplating industry

DAWT·2022-05-09

System Introduction

In the electroplating and coating industry, in order to increase the surface finish, brightness and adhesion of the plated parts, the preparation of the electroplating solution requires pure water with a conductivity of less than 15uS/cm; The following electroplating pure water is used for cleaning. The electroplating industry water treatment system includes a pure water system for the preparation of the electroplating solution before electroplating, and a zero-discharge system for the recycling of rare metals in the electroplating rinsing wastewater and the recycling of the rinsing water for electroplating wastewater treatment. Usually the system consists of pretreatment, ultrafiltration, reverse osmosis (RO), ion exchange, EDI equipment, etc. to meet the requirements of various water quality in the electroplating industry.

Process flow

1. Using ion exchange, the process is as follows:

Raw water→electric valve→multi-media filter→active carbon filter→softening water→intermediate water tank→low pressure pump→precision filter→cation resin bed→anion resin bed→anion and cation resin mixed bed →Microporous filter→Water point

2. The reverse osmosis method is adopted, and the process is as follows:

Raw water→electric valve→multi-media filter→active carbon filter→softening water→intermediate water tank→low pressure pump→precision filter→first stage reverse osmosis→PH adjustment→mixer→ Secondary reverse osmosis (positive charge on the surface of reverse osmosis membrane)→pure water tank→pure water pump→microporous filter→water point

3. Using high-efficiency reverse osmosis plus EDI, the process is as follows:

Raw water→electric valve→multi-media filter→activated carbon filter→softening water→intermediate water tank→low pressure pump→PH value adjustment system→high efficiency mixer→precision filter→high efficiency reverse osmosis →intermediate tank→EDI pump→EDI system→microporous filter→water point