Sharing on the pre-treatment requirements for ultra-pure water equipment in the electronics industry

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This post was last edited by hesonchang214 on 2020-4-3 09:55. The conductivity of the feed water is an important factor that affects its quality. To ensure that the EDI module receives high-quality feed water, it is necessary to keep the conductivity of the water after pre-treatment at less than 40μs/cm; only when the conductivity is below 40μs/cm can the feed water effectively remove impurities. The water entering the module should not contain excessive carbon dioxide; therefore, the carbon dioxide in the water entering the equipment must be removed as much as possible. The main method for removing carbon dioxide is to adjust the pH level during the pretreatment stage. 　　Ultra-pure water equipment used in the electronics industry also has certain requirements regarding the hardness of the incoming water. Controlling this hardness is quite simple; softening the water before it enters the system, while simultaneously removing carbon dioxide, is sufficient. When the salt content in the water entering the module exceeds a certain level, it is possible to add an additional reverse osmosis system or nanofiltration system in combination with desalination processes.