Process flow for preparing ultrapure water for electroplating industry

The process of preparing super water in the electroplating industry can be roughly divided into the following categories:

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

Raw water → raw water pressure pump → multi-media filter → activated carbon filterwater softener → precision filter → cation resin filter bed → anion resin filter bed → anion and yang resin mixed bed → microporous filter → water point

2. Two-stage reverse osmosis method is adopted, and the process is as follows:

Raw water → raw water pressure pump → multi-media filter → activated carbon filterwater softener → precision filter → first-stage reverse osmosis → PH adjustment → intermediate water tank → second-stage reverse osmosis (the surface of the reverse osmosis membrane is positively charged) → Purified water tank → pure water pump → microporous filter → water point

3. The EDI method is adopted, and the process is as follows:

Raw water → raw water pressure pump → multi-media filter → activated carbon filter water softener → precision filter → primary reverse osmosis machine → intermediate water tank → intermediate water pump → EDI system → microporous filter → water point

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