Water treatment system and control method for water treatment system

Abstract

The invention discloses a water treatment system and a control method for the water treatment system. The water treatment system comprises a reverse osmosis unit. The water treatment system comprisesa washing mode and a water production mode. The water treatment system further comprises a water production backflow waterway and a washing backflow waterway. In the water production mode, concentrated water produced by the reverse osmosis unit can flow back to one water inlet side of the reverse osmosis unit via the water production backflow waterway, and in the washing mode, the concentrated water produced by the reverse osmosis unit can flow back to one water inlet side of the reverse osmosis unit via the washing backflow waterway. According to the water treatment system disclosed by the invention, the recovery of the water production mode is improved, the water inlet quantity on one water inlet side of the reverse osmosis unit is increased, the enrichment range phenomenon is further retarded, the service life of the reverse osmosis unit is prolonged, and the cost is reduced, so that formation of the small crystal nucleus is disturbed during washing, scale formation is retarded, theservice life of the reverse osmosis unit is prolonged, and the cost is reduced.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a water treatment system and a control method for the water treatment system. Background technique [0002] At present, water purifiers are more and more recognized by everyone, but the water purifiers of the prior art have the disadvantages of large volume, low recovery rate, and many waste water discharges. [0003] The water purifiers of the prior art, including the reverse osmosis filter membrane, in order to reduce the waste water discharge and improve the recovery rate of the water purifier, are realized by reducing the waste water discharge or returning the waste water. Although these two treatment methods reduce The discharge of waste water is reduced and the recovery rate is improved. However, directly reducing the discharge of waste water or returning the waste water will cause serious concentration polarization on the surface of the reverse osmosis filter membr...

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Problems solved by technology

[0002] At present, water purifiers are more and more recognized by everyone, but the existing water purifiers have the disadvantages of large volume, low recovery rate, and large waste water discharge.

[0003] The water purifiers of the prior art, including the reverse osmosis filter membrane, in order to reduce the waste water discharge and improve the recovery rate of the water purifier, are realized by reducing the waste water discharge or returning the waste water. Although these two treatment methods reduce The discharge of waste water is reduced and the recovery rate is improved. However, directly reducing the discharge of waste water or returning the waste water will cause serious concentration polarization on the surface of the reverse osmosis filter membrane, and it is very easy to see the concentration polarization on the surface of the reverse osmosis filter membrane. Small crystal nuclei are formed on the surface of the reverse osmosis filter membrane, and then scale is formed on the surface of the reverse osmosis filter membrane, so that the performance of the reverse osmosis filter membrane decays faster, the life is shortened, the replacement cycle is shortened, and the cost is increased

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