| 摘要 |
PROBLEM TO BE SOLVED: To provide a closed type cooling tower, facilitating drain work for cooling water, and a draining method therefor. SOLUTION: This closed type cooling tower 1 includes closed type heat exchangers 24a, 24b, wherein circulating cooling water flowing through the closed type heat exchangers is indirectly cooled by distributed water from an upper water tank 21 to the closed type heat exchangers 24a, 24b. An inflow electric driving valve MV1 and an outflow electric driving valve MV2 are disposed in an inflow pipe 40 and an outflow pipe 42 for the circulating cooling water. The cooling tower includes: a compressed air inlet branching off from a pipeline between the closed type heat exchanger and the inflow electric driving valve MV1 or between the closed type heat exchanger and the outflow electric driving valve MV2; a draining electric driving valve MV3 provided to branch off from the compressed air inlet through the closed type heat exchanger; and a pressure sensor P1 provided in a pipeline extending from the inflow electric driving valve through the closed type heat exchanger to the outflow electric driving valve. COPYRIGHT: (C)2009,JPO&INPIT
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