Introducing a Method for Reducing Dissolved Impurities in Wet Cooling Towers

One of the most efficient systems for transferring the thermal energy from the power plants to the environment is the wet cooling towers. Dissolved impurities, which are entered into the cooling tower by makeup water, can be limited by the blowdown system. In the present paper, the water quality in the wet cooling towers was studied. Analyses showed that the continuous blowdown is more efficient than periodic one. Furthermore, a group of the wet cooling towers with a certain amount of blowdown, the blowdown system of towers can be utilized to reduce the dissolved impurities. For a special case, the effectiveness of the blowdown in a group of five cooling towers has been investigated, and it was shown that with 20 percent blowdown, the average impurity levels in towers can be reduced from six times of the dissolved impurities in water-supply to 2.74.