Process flow of ultra-pure water treatment equipment for circuit boards

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　　1. The ion exchange method is used, and the process is as follows: Raw water → Raw water pressure pump → Multi-media filter → Activated carbon filter → Water softener → Precision filter → Cation resin filter bed → Anion resin filter bed → Mixed cation-anion resin bed → Micro-porous filter → Water usage point.

2. The two-stage reverse osmosis method is employed, and the process is as follows: Raw water → Raw water pressure pump → Multi-media filter → Activated carbon filter → Water softener → Precision filter → First-stage reverse osmosis → pH adjustment → Intermediate water tank → Second-stage reverse osmosis (with positively charged reverse osmosis membrane surface) → Purified water tank → Purified water pump → Micro-porous filter → Water usage point.

3. The EDI method is used, and the process is as follows: Raw water → Raw water pressure pump → Multi-media filter → Activated carbon filter → Water softener → Precision filter → First-stage reverse osmosis unit → Intermediate water tank → Intermediate water pump → EDI system → Micro-porous filter → Water usage point