One-way anion exchange type water filtering and purifying system and method and water purifier

Abstract

The invention discloses a one-way anion exchange type water filtering and purifying system and method and a water purifier. The water purifier is used for purifying water through the water filtering and purifying system; only a first anion exchange membrane is arranged between a cation exchange unit and an anion exchange unit of an ion exchange regeneration unit of the water filtering purificationsystem; raw water is directly desalted through a desalted water path of the ion exchange regeneration unit; then pure water is generated and desalination efficiency is achieved; in addition, hydrogenions and hydroxyl ions are generated through electrolysis of the regenerated water path; hydroxyl ions replace salt anions in the cation exchange unit and the anion exchange unit, which are desaltedfor a long time through a first anion exchange membrane; then hydrogen ions enter the cation exchange resin along with water to replace salt positive ions. The ion exchange regeneration unit improvesthe utilization rate of the water filtering and purifying system and the service life of the water purifier is prolonged.

Description

Technical field [0001] The invention relates to the technical field of water purifiers, in particular to a one-way anion exchange water filtration purification system, method and water purifier. Background technique [0002] Most of the existing ion exchange water purifiers use a combined filter element in which anions and cations are treated separately for water purification. The combined filter elements are generally equipped with an anion exchange membrane and a cation exchange membrane double-layer membrane. The membrane replaces the anions and cations to achieve the effect of desalination. The combined filter element with separate treatment of anions and cations generally processes one type of ion first and then another type of ion with different electrical properties. Only a single ion exchange is required. The use cost of a double-layer ion exchange membrane is too high, and The ion exchange filter element needs to be replaced after working for a certain period of time to...

AI Technical Summary

Problems solved by technology

However, the combined filter elements that treat anions and cations separately generally treat one kind of ion first and then another ion with different electrical properties. Only a single ion exchange is required, and the use cost of double-layer ion exchange membrane is too high, and The ion exchange filter element needs to be replaced after working for a certain period of time to maintain the normal water purification performance of the water purifier, and the double-layer ion exchange membrane increases the cost of replacing the filter element

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