DESALINATION SYSTEM

PROBLEM TO BE SOLVED: To provide a desalination system having a longer durable time of a reverse osmosis membrane than that of conventional reverse osmosis membranes and capable of satisfactorily performing sterilization of the reverse osmosis membrane by suppressing deterioration of the reverse osm...

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Bibliographische Detailangaben
Hauptverfasser: FUKUZAKI KOJI, MIYAGAWA HIROKI
Format: Patent
Sprache:eng ; jpn
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Beschreibung
Zusammenfassung:PROBLEM TO BE SOLVED: To provide a desalination system having a longer durable time of a reverse osmosis membrane than that of conventional reverse osmosis membranes and capable of satisfactorily performing sterilization of the reverse osmosis membrane by suppressing deterioration of the reverse osmosis membrane.SOLUTION: A desalination system 1A of the present invention comprises a reverse osmosis device 22 having a reverse osmosis membrane, a water to be treated supply path supplying brine as water to be treated 11 to the reverse osmosis device 22 and a chloramine generator 23 generating chloramine outside the water to be treated supply path and supplying the chloramine into the water to be treated supply path. As the desalination system 1A generates chloramine outside the water to be treated supply path, reaction of bromide ions contained in the water to be treated and a chloramine raw material in the water to be treated supply path is avoided. Consequently, the desalination system 1A prevents hypobromous acid and bromo amine having strong oxidizing power from being generated in the water to be treated supply path.SELECTED DRAWING: Figure 1 【課題】本発明は、逆浸透膜の劣化を抑制して従来よりも逆浸透膜の耐用時間が長く、かつ逆浸透膜の殺菌を充分に行うことができる淡水化システムを提供する。【解決手段】本発明の淡水化システム1Aは、逆浸透膜を有する逆浸透装置22と、前記逆浸透装置22に被処理水11としての鹹水を供給する被処理水供給経路と、前記被処理水供給経路外でクロラミンを発生させ、このクロラミンを当該処理水供給経路内に供給するクロラミン発生装置23と、を備えることを特徴とする。この淡水化システム1Aは、被処理水供給経路外でクロラミンを発生させるため、被処理水中に含まれる臭化物イオンとクロラミン原料とが被処理水供給経路内で反応することが回避される。これにより淡水化システム1Aでは、酸化力の強い次亜臭素酸やブロモアミンが被処理水供給経路内で発生することを防止する。【選択図】図1