This system equipped with one set of stainless raw water pump, which could provide a water supplying pressure to ensure water stable homogeneous flow through pretreatment equipment.
 

Quartz sand filter
Working principle: mechanical filter is a pressure filter, use the refined quartz sand filtration filled in the filter, when the water flows through the filter layer from top to bottom, suspended particles and adhesive paper in water will be removed, water turbidity will be reduced. It is often used in reverse osmosis, ion exchange, and pretreatment of electrodialysis equipment .

Activated carbon filter
Working principle: adsorption capacity of activated carbon is mainly in the form of physical adsorption, it also can be some selective adsorption, that is chemical adsorption.
Activated carbon is main adsorbent extensively applied in water treatment , lattices in various shapes and sizes which generated during the activation processing ,it will form a huge surface area, so contact surface between carbon and water is very large, and the absorption capacity is strong .Effectively ensure the service life of follow-up equipment, improve the water quality of effluent. During manufacturing of pure water, the role of activated carbon is mainly manifested in following four aspects, reduce oxidation degree in water, avoid organic substances into the contamination of RO membrane module, remove residual chlorinefrom water, remove three halide material (THM).

Water softener(ion-exchange water softener)
Working principle: absorb the calcium and magnesium ions in water with resin, since the hardness of water is mainly composed of calcium and magnesium, n general, we adopt cation exchange resin (softener),replace Ca2+, Mg2+ (main ingredients for scale ) in water with the Ca2+, as the increase of Ca2+ and Mg2+ in resin, removing performance on Ca2+, Mg2+ of resin will gradually reduce.
   When the resin has absorbed a certain amount of calcium and magnesium ions,it must be birth, the regeneration process is that flush resin layer with the salt water in salt box , replace hardness ion out of the resin again, and discharged from the tank with waste liquid of regeneration, then resin resumed the function of softening and exchanging .
since the hardness of water is mainly composed of calcium and magnesium ,the principle of sodium ion exchange and softening treatment is to exchange cation in the raw water with  resin,hardness constituents Ca2+and Mg2+ in water exchange Na+ in resin,thus absorb the Ca2+and Mg2+ to make the water to be softened,Foe example, the RNa represents sodium type resin,the exchanging process is as follows:
2RNa + Ca2+ = R2Ca + 2Na+
2RNa + Mg2+ = R2Mg + 2Na+
After the water treated by sodium ion exchanger, the Mg+ was replaced by Na Ca+.
 

PP filter
The reverse osmosis device configured with an precision filter with filtration degree is 5 μ m,which could prevent the particles from entering the pump and RO membrane module, or scratching the surface of the membrane. There are 1 pieces 20"polypropylene melt-blown cartridges in the UF filter housing ,when the pressure difference reached 1kg/cm³,we should replace it with a new one ,Under normal operating conditions, this filter cartridge can maintain its life of more than 2 ~ 3 months ,and filter structure could meet the requirements of rapid replacement on filtration cartridge.

High pressure pump

According to the result of calculation, Input of water for a reverse osmosis device(first grade)  is 0.5m³/hour,select a vertical multistage pump.
 

Reverse osmosis membrane
components adopts imported 4040 composite reverse osmosis membrane, The first desalination rate for single membrane is 99.2%, normal desalting rate is not less than 95%,maximum recovery rate for a single membrane module is 70%.And it is installed in the 8040-2 shell which is made of high strength glass steel material.
 

UV Sterilizer
This installment has adopted the high strength non- ozone UV sterilizer lamp and shell which specially makes passes through the special handling micro coal smelly body stainless cylinder body, the tube body flank after specially polishes processing, causes when has flowed the tube body to receive the 253.7nm ultraviolet ray after the pretreatment water the enough line quantity illumination,has the good sterilization effect, also effectively reduced to the ultra pure water influence.
 

Removing ratio of reverse osmosis on ions

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