Efficiency of water usage in cooling towers will be measured by the quantity of times water can be cycled by way of the system. . That is also referred to as cycles of concentration. As pure water evaporates from the cooling tower, the dissolved solids within the water remain behind and steadily increase in focus. The ratio of the concentration of dissolved solids in the cooling tower water to the concentration of dissolved solids within the make-up water is used to measure the cycles of concentration. Make-up water may be described because the water used to compensate for the lack of water via evaporation and system bleed. The composition of the make-up water determines what number of cycles of concentration may be attained in a cooling tower. When the pH and calcium of the make-up water is simply too excessive, the number of cycles of concentration is proscribed by the solubility and attainable precipitation of scale. Water and sewer financial savings are significantly increased at maximized cycles of focus. If make-up water is limiting your system to lower than three cycles, feeding acid could present a extra economical operation in your cooling tower.
What does the acid do to the tower water? Adding acid to the cooling tower water balances pH and prevents scale from forming.
Extra particularly, adding acid will neutralize alkalinity. Sulfuric acid reacts with natural carbonate alkalinity within the water forming carbon dioxide (which is dispelled to the environment) and an all-natural compound referred to as sulfate.
How do I calculate how much acid I will want? The amount of acid required is determined by the alkalinity of your make-up water and your desired cycles of concentration. You will have to add sufficient acid to neutralize the alkalinity to some extent where the calcium hardness remains soluble. This would require you to consider what the alkalinity will be once the make-up water has cycled up and after the acid is added.
It will be important to know how alkalinity is “cycled up” in systems and it depends on many components that may differ from water source to water supply. To safely calculate the need for an acid supplement, don’t hesitate to name a member of the Chardon Technical Help Staff.