Desalination Control
With the evaporation in the cooling tower the desired cooling effect is achieved, however the remaining circulatin water becomes more and more concentrated with salts.
The upper limits of the concentration must not exceed a value fixed for the cooling tower. By opening the desalting valve, the circulation water is drained from the system and replaced by fresh makeup water through the level control of the cooling tower.
With increasing concentration, the conductivity of the circulation water increases. Conductivity measurement is used to determine the concentration of the salt via a temperature-compensated, conductivity probe that continuously measures the conductivity in the circulation water of the cooling tower. The desalting (blow-down) valve is regulated via the output of the cooling tower control.
The desalination may be regulated comfortably with the ProMinent Cool-Control unit. The conductivity sensor (inductive or conductive) and the desalination solenoid valve are connected to the Cool-Control. After determination of the conductivity limit values (upper and lower value) the concentration is then automatically.