The water quality of the ultra-pure water system for circuit boards meets the standards

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　　The water quality produced by the ultra-pure water equipment for circuit boards can meet **the specified hygiene standards, satisfying the actual production requirements of enterprises. Customers can also adjust the water output of the ultra-pure water equipment on the circuit board according to their actual water consumption needs, so as to fully meet the production requirements of their industry. 　　Working principle of the ultra-pure water equipment for circuit boards: A direct current electric field is applied between the anode (+) and cathode (-) located at both ends of the module. The potential causes the ions exchanged onto the resin to migrate along the surface of the resin particles and pass through the membrane into the concentrated solution chamber. The anode attracts negative ions (such as OH, Cl). These ions pass through the anion membrane into the adjacent concentrated stream, but are blocked by the cation selective membrane, thus remaining in the concentrated stream. As the water flows through these two parallel chambers, ions are removed in the pure water chamber and accumulate in the adjacent concentrated water stream, which then carries them away from the module. The use of ion exchange resins in pure water and concentrated solutions is key to the ElectropupreEDI technology and its patents. An important phenomenon occurs in the ion exchange resin of the pure water chamber. 【Laitlead Shanghai Water Treatment Equipment Company www.shanghaishui.com】 Process flow of ultra-pure water equipment for circuit boards 1. 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 → Ion exchanger → Purification water tank → Pure water pump → Ultraviolet sterilizer → Micro-porous filter → Water usage point 2. 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 (reverse osmosis membrane with a positive charge) → Purification water tank → Pure water pump → Ultraviolet sterilizer → Micro-porous filter → Water usage point 3. 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 → Purification water tank → Pure water pump → Ultraviolet sterilizer → Micro-porous filter → Water usage point Circuit boards are small in size and light in weight, and can be widely used in electronic products. Ultra-pure water is required in production, and the quality of the water produced by ultra-pure water treatment equipment must meet various standards. Firstly, it must meet the ultra-pure water standards set by the Ministry of Electronics Industry, as well as China’s GB/T II446.1-1997 standard for electronic-grade ultra-pure water; in addition, it must comply with other standards from countries such as the United States and Germany. 　　I hope we can learn from each other, discuss together, and make progress as a group.