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|1. (WO2018159300) COOLING TOWER SYSTEM|
|Applicants:||KURITA WATER INDUSTRIES LTD.
|Title:||COOLING TOWER SYSTEM|
When recirculation and supply of cooling water from a cooling tower 1 to a heat exchanger 4 is continued, the water level inside a pit 1d gradually decreases and electrical conductivity gradually increases. A submersible pump 8 starts operation once the electrical conductivity reaches an intermediate value C2. The water supply from the submersible pump 8 undergoes RO treatment by an RO device 13, concentrate is discharged outside the system, and permeate is guided to the pit 1d. Once the water level decreases to a lower limit H0, a ball tap 21 opens, and replenishment water is supplied until the water level increases to an upper limit H1. The submersible pump 8 stops when the electrical conductivity decreases to a prescribed value C1 in conjunction with the replenishment water supply.