| 摘要 |
PROBLEM TO BE SOLVED: To realize reduction in overall size and economization of a facility by switching valves to form a circulation loop passing one of a plurality of juxtaposed heat exchangers and sucking ozone generated from a single ozone circulator into cleaning water in the circulation loop thereby cleaning a heat exchanger. SOLUTION: A heat exchanger comprising a plurality of juxtaposed heat exchangers A is provided with a single set of ozone circulator B. When some heat exchanger A is cleaned, a circulation pump 12 is operated while closing the shutoff valves 6, 7 associated with the water supply pipe 4 and the drainage pipe 5 of the heat exchangers A and opening a corresponding circulation valve 9. Consequently, water is circulated through a circulation loop 11 comprising the water supply pipe 4, the heat exchanger body 3, the drainage pipe 5 and an interconnecting pipe 8. Ozonized gas generated from an ozone generating source 14 is sucked through an ejector 13 into circulating water and mixed therewith to produce ozone dissolving water which is used for cleaning the heat exchangers A.
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