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Ultra-pure water system principle

Author: ComeFrom: Date:2015/12/30 14:09:07 Hits:650
Ultrapure water system has been generally refers to a variety of water treatment processes and water quality monitoring system came to achieve the purpose of purified water a class means. Common impurities include natural water-soluble inorganic, organic, particulate matter, microorganisms and soluble gases.
      
       Ultra-pure water is to place these impurities thoroughly as possible. Water purification process currently used methods are distillation, reverse osmosis, ion exchange, filtration, adsorption, ultraviolet oxidation method. Ultra-pure water purification process can be generally divided into four big water pretreatment (primary purification), reverse osmosis (produced water), ion exchange (18.2MΩ.cm can produce ultrapure water) and the terminal process (production to meet the special requirements of the ultra pure water).
      
       Pretreatment Since water through reverse osmosis pretreatment will be re-step purification, so be sure to try to remove the influence of impurities on the reverse osmosis membrane; including large particulate matter, chlorine and calcium and magnesium ions. A good solution to this problem, design precision filter, activated carbon adsorption filters and softening resins targeted remove large particulate matter, chlorine and calcium and magnesium ions to achieve the best pretreatment effect.
      
       Reverse Osmosis Reverse osmosis is a high-pressure pump using the high concentration solution provides an osmotic pressure greater than the pressure difference, water molecules will be forced through a semipermeable membrane to the low concentration side, reverse osmosis can filter out 90% -99% include inorganic The vast majority of contaminants including ions, because it superior purification efficiency, reverse osmosis is a very effective technique of ultra-pure water system water purification system, because the reverse osmosis can remove most of the dirt.
       
       Ion exchange water that is ion-exchanged cation ion exchange resin in the H ion exchange, ion exchange water anion OH- ion exchange resin, so as to achieve ultra-pure water system water purification purposes. Remove ions by ion exchange, in theory, be able to remove almost all of the ionic species, at 25 ℃, the water resistivity of 18.2MΩ. cm. After water quality depends on the level of ion exchange resins and ion exchange mass exchange exchange efficiency within the water column and resin.
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