| 摘要 |
PURPOSE:To stably obtain made-up water so as to deal with disturbance, by respectively detecting the temp. of brine at the first stage inlet of an evaporation chamber and that of brine at the final stage of the evaporation chamber and operating the temp. difference between both detection terminals. CONSTITUTION:A final stage brine temp. detector 31, a subtractor 32 and a flash range controller 33 are provided and a flash range is operated by the subtractor 32 while the temp. difference corresponding to a set made-up water amount is calculated by a function device and a heating supply amount is controlled so as to allow the output signal of the subtractor 32 to coincide with that of the function device. By this method, even if an external operational condition changes, control can be performed so as to make the given flash range constant. |
