CLEANING DEVICE AND CLEANING METHOD OF SPIRAL HOT WASTE WATER HEAT EXCHANGER

PROBLEM TO BE SOLVED: To provide a cleaning device and a cleaning method capable of enhancing the cleaning effect in a spiral pipe, by flowing high temperature water, by selecting every individual pipe with a ball moored in advance. SOLUTION: This spiral hot waste water heat exchanger has a high temperature water passage formed by respectively connecting the winding start end of spiral pipes superposed in a plurality of stages to a first ball storage device and the winding finish end to a second ball storage device, and a spiral passage formed airtightly with mutual walls of a partition plate made by forming a plate in a spiral shape, the spiral pipes being inserted in the spiral passage; and passes low temperature water through the spiral passage and passes the high temperature water through into the high temperature passage; and is characterized in that cleaning balls of the number corresponding to the number of spiral pipes are respectively stored in the first ball storage device and the second ball storage device, and the cleaning balls are reciprocatably passed through into this pipe by selecting optional one of the spiral pipes by using a flow passage switching means, and are successively, similarly and reciprocatably passed one by one even through the other spiral pipe. COPYRIGHT: (C)2006,JPO&NCIPI