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Technical process analysis of electronic grade ultrapure water equipment

Time: 2019-06-19

           The production process of the electronic industry requires very high usage of water for production. The higher the integration of integrated circuits, the higher the quality of water. At present, China's Ministry of electronics industry divides the electronic grade water quality technology into five industry standards, namely, 18M.Cm, 15M.Cm, 10M Omega.Cm, 2M.Cm, 0.5M.Cm, so as to distinguish different water quality. The use of Chongqing electronic grade ultra pure water equipment can produce five standard water.

Electronic, semiconductor, liquid crystal display and photovoltaic industrial production often require extremely pure ultra pure water in the production process. If the quality of pure water can not meet the requirements of production process water or unstable water quality, it will affect the treatment effect and service life of the subsequent process. In the production of electron tubes of photovoltaic industry, if impurity is mixed, the emission of electrons will be affected, and the amplification and service life of electron tubes will be affected. In the production of CRT and CRT, the fluorescent screen can be attached to a fluorescent substance by spraying or precipitation. If the copper content in pure water is above 8ppb, it will cause luminescence and discoloration. If iron is above 50ppb, it will make light discolouration, darken and flicker, and will cause bubbles, bars, light spots and other defective products.
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Process flow of electronic grade ultra pure water equipment
1. Adopting ion exchange method, the process is as follows: tap water, electric valve, multi-media filter, activated carbon filter, softener, intermediate water tank, low pressure pump, precision filter, cation resin bed, anion resin bed, Yin Yang resin mixed bed, microporous filter, water point.
2. Adopt the two stage reverse osmosis process, the process is as follows: tap water to electric valve, multi-media filter, activated carbon filter, softener, intermediate water tank, low-pressure pump, precision filter, primary reverse osmosis host, PH adjustment, mixer, two stage reverse osmosis main engine (reverse osmosis membrane with positive surface charge), then pure water tank, pure water pump, micro pore filter, water point.
3. Adopt high efficiency reverse osmosis plus EDI mode, the process is as follows: tap water, electric valve, multi-media filter, activated carbon filter, softener, intermediate water tank, low pressure pump, pH regulation system, high efficiency mixer, precision filter, high efficiency reverse osmosis intermediate water tank, EDI water pump, EDI system, micro pore filter, water point.
Characteristics of electronic grade ultrapure water treatment system
1. the floor area is small and the water utilization rate is high. It does not consume much acid and alkali. The desalting rate can reach more than 99%.
   2. the disadvantage of electronic grade ultra pure water treatment system is relatively large investment.
3. electronic grade ultrapure water treatment system uses laminated filter, ultrafiltration membrane and security filter as pretreatment, which can remove impurities such as suspended solids, colloids, residual chlorine and sediment in the water, so that the treated water meets the requirements of reverse osmosis water intake, and the soluble salts and bacteria can be removed by reverse osmosis membrane. Then, the continuous electric desalting unit is used for desalination treatment. The resistivity of water is up to 15M above.Cm, and then use electronic grade pure water resin polishing and mixed bed to remove salt, so that the resistivity of water and electricity is up to 18.2M.Cm. TOC degradation apparatus and precision filter were used for post treatment to prevent bacteria from being contaminated two times.
Four Chongqing Lide electronic grade ultrapure water The main components in the system, such as EDI film blocks, are all well-known international brands. All of them are selected according to the requirements of reverse osmosis membrane design and EDI inlet requirements, so as to ensure the safe operation of the system.
Electronic grade ultrapure water equipment Occasion application  
Electronic grade semiconductor materials, devices, printed circuit boards and integrated circuits;
Electronic grade ultrapure materials and ultra pure chemical reagents;
Laboratory and trial run room ;
Surface polishing of automobiles and household appliances;
. other high-tech products.

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