What is the technical difference between softening water treatment equipment and reverse osmosis water treatment equipment?

Softened water treatment is generally resin method, which needs to consume chemicals for regeneration in normal operation, and it is not easy to realize full automatic control; Reverse osmosis is a membrane method, which uses reverse pressure to separate water molecules. During normal operation, it mainly consumes electric energy and is easy to realize full automatic control. The detailed appendix is as follows:

Softening of water is a method to reduce the hardness of water and prevent scale deposition by using ion exchange resin to reduce or almost completely remove calcium and magnesium ions in water. When the resin absorbs a certain amount of calcium and magnesium ions, it must be regenerated. Replace calcium and magnesium ions in the resin with saturated brine, restore the softening and exchange ability of the resin, and discharge the waste liquid.

Process flow of reverse osmosis pure water equipment

1. Raw water → raw water tank → raw water pump → multi-media filter (quartz sand filter) → activated carbon filter → soft water processor → precision filter → high pressure pump → primary reverse osmosis (RO) device → pure water tank → high pressure pump → secondary reverse osmosis → ultraviolet sterilization device → water point.

2. Raw water → raw water tank → raw water booster pump → multimedia filter → activated carbon filter → water softener → precision filter → high pressure pump → primary reverse osmosis equipment → pure water tank → pure water pump → water consumption point (effluent conductivity: ≦ 10us/cm).

3. Raw water → raw water booster pump → multi-media filter → activated carbon filter → water softener → precision filter → first-stage high-pressure pump → first-stage reverse osmosis → second-stage high-pressure pump → second-stage reverse osmosis (the surface of reverse osmosis membrane is positively charged) → pure water tank → pure water pump → water consumption point (effluent conductivity: ≥ 2 us/cm).

Reverse osmosis membrane technology is the most commonly used in the process of purifying water equipment. The treatment of reverse osmosis membrane is a semi-membrane separation technology driven by the pressure of membrane structure and function. When the increment of system pressure is greater than the osmotic pressure of feed water solution, water molecules continuously permeate the membrane as the production pipeline of product water central pipe. Impurities such as ions, bacteria, organics and viruses with one end in the water remain in the membrane on the water side, and then the discharged concentrated water flows out of the water side to achieve the purpose of separation and purification.