WASHING APPARATUS FOR FILTRATION MEMBRANE

摘要

PROBLEM TO BE SOLVED: To provide a washing apparatus for a filtration membrane by a chemical addition reverse washing system capable of performing a desired flow rate control by a simple constitution without performing PID control of a flow rate of reverse washing water by an inverter for a reverse washing pump. SOLUTION: The washing apparatus for the filtration membrane of the chemical addition reverse washing system is provided with the filtration membrane for cleaning raw water to obtain treatment water; a reverse washing line 30 for performing reverse washing of the filtration membrane using a part of the treatment water as reverse washing water of the filtration membrane; and a chemical injection line 24 for adding the chemical to the reverse washing line 30 to perform reverse washing. The reverse washing line 30 is provided with a by-pass line 31 for the reverse washing water on a part, and an opening/closing valve 33 is provided on one of the reverse washing line 30 and the by-pass line 31 and a constant flow rate valve 32 is provided on the other. COPYRIGHT: (C)2007,JPO&INPIT