PURE WATER PRODUCING APPARATUS AND PURE WATER PRODUCING METHOD

PURE WATER PRODUCING APPARATUS AND PURE WATER PRODUCING METHOD

PROBLEM TO BE SOLVED: To provide a pure water producing apparatus and a pure water producing method which can produce pure water with very low boron concentration at a high water recovery rate. SOLUTION: The pure water producing apparatus includes a pretreatment device 5 for treating raw water W0, a...

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Bibliographische Detailangaben
1. Verfasser: IWASAKI KUNIHIRO
Format: Patent
Sprache:eng
Schlagworte:
CHEMISTRY
METALLURGY
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
SEPARATION
TRANSPORTING
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Zusammenfassung:PROBLEM TO BE SOLVED: To provide a pure water producing apparatus and a pure water producing method which can produce pure water with very low boron concentration at a high water recovery rate. SOLUTION: The pure water producing apparatus includes a pretreatment device 5 for treating raw water W0, a first electric deionizer 6A for receiving treated water W1 from the pretreatment device 5 into a desalting chamber 11A to perform deionization treatment, and a second electric deionizer 6B for receiving concentrated water W4 from the first electric deionizer 6A into a desalting chamber 11B to perform deionization treatment. Desalted water W5 from the second electric deionizer 6B is supplied to the upstream side of the first electric deionizer 6A. COPYRIGHT: (C)2010,JPO&INPIT