.1   Water feeding pump

Requested access to the system's raw water has a stable flow and pressure, its purpose is to prevent water fluctuations have an impact on the system operation to ensure the stability of the system into the water, pressure ≥ 0.3MPa.

2.2 Quartz sand filter

Quartz sand filter is an important pre-processing device of reverse osmosis system, the system for the raw water quality characteristics of specially designed multi-media filter, and its role is to filter the raw water caused by small particles, suspended solids, colloids and other impurities, ensure that its effluent SDI (API) ≤ 4.

2.3 Activated carbon filters

 For the effective removal of low molecular weight organic matter in water, free chlorine and some dissolved carbonic acid gas, the water can also reduce the odor, color and smell, when it take the role as pre-treatment device of RO, it can effectively prevent the organic pollution and free chlorine on the reverse osmosis membrane damage.

2.4  Resin softener

Cationic resin used for water softening, primarily to remove hardness of water. The hardness of water is a major calcium (Ca2 +), magnesium (Mg2 +) ion composition, when containing the raw water hardness ions through the resin layer, the water of the Ca2 +, Mg2 + was exchanged resin adsorption, and other objects at the same time the quality of the release of sodium Na + ions flow from the softener in the water is removed from the softened water hardness ions. So as to effectively prevent the reverse osmosis membrane fouling.

2.5 5μMicron filter

The function of Micron filter is to be retention of the particles larger than 5μ in order to prevent it from entering the reverse osmosis system. Such particles may be accelerated by the high-pressure pump to breakdown reverse osmosis membrane modules, resulting in a large number of leakage of salt, bearing in scratch high-pressure pump impeller, resulting in high-pressure pump damaged. Filter element in the filter is replaceable, when the element of export value is beyond (usually 0.07 ~ 0.1MPa), it should be replaced and changed new filter element.

Micron filters adopted corrosion-resistant 304 stainless steel filter housing.Filter element is made of polypropylene spraying, characterized by:

 1) Hole-shaped and cone-shaped structure;

 2) filter to enter the depths, forming deep filtration;

 3) The quantity of pollutants, long life;

 4) easy to replace.

2.6 RO system

This process is to remove salt from water by membrane separation technique.

2.6.1 High pressure pump

The role of high-pressure pump for reverse osmosis plant is to provide sufficient bulk water pressure to ensure the normal operation of reverse osmosis membrane.

 According to the characteristics of reverse osmosis itself takes a certain impetus to overcome the osmotic pressure and other obstacles, in order to ensure that water reaches its design capacity. According to the configuration of reverse osmosis, calculated by special software, design temperature is 15 ℃, required by the inlet pressure of not less than 1.2MPa, taking into account the loss of the resistance of pipeline, designing high-pressure pump total pressure head of 1.3MPa.

2.6.2 RO System.

Using reverse osmosis technology for desalination, reverse osmosis membrane was only 0.001 micron pore size, can be harmful to remove dissolved solids and bacteria, viruses, etc., desalination rate of more than 99.6 percent, in line with national standards to produce pure water, the host section contains the security filter, high-pressure pump and reverse osmosis membrane, security filters for the fourth grade and above pre-treatment systems, high-pressure pump is the host of one of the core equipment for the reverse osmosis membrane elements to provide sufficient pressure to overcome the penetration resistance to pressure and run to meet the needs of a device to achieve the rated water.