To absorb the calcium and magnesium ions in the water with resin. As the hardness of the water is mainly formed and expressed by calcium and magnesium, the cation exchange resin (water softener)is generally used to replaceCa2 + and Mg2in the water The resin efficiency to removeca2 + and Mg2+ gradually reduces as ca2 + and Mg2 + in the resin increase. When the resin absorbs a certain amount of calcium and magnesium ions, it is necessary to be regenerated. In the regeneration process, the resin bed is flushed by saline in the salt box and hardness ions on the resin are replaced and discharged with recycled waste fluid, the resin’s function of softening exchange is recovered. The principle of sodium ion exchanging softening treatment is to use sodium cation exchange resin to exchange the hardness ingredients, Ca2 + and Mg2 +, in the raw water with Na + in the resin, absorbing Ca2 + and Mg2 + in the water, so that water gets softened.

Ion exchanger includes: water softener(also called sodion exchanger),anion and cation exchanger,mixing ion exchanger, ect. Housing material can be FRP (fiberglassreinforced plastics), carbon steel with rubber lining and stainless steel with rubber lining, ect.

Widely used in pretreatment of pure water production line in boiler, thermal power station, chemical, light industry, textile, medicine, biology, electronic, atomic energy; hard water soften and deionization in industrial processing; purification of food and drugs, reuse of precious metals and chemical raw materials, waste water of electroplating, ect.