Water evaporated is pure water and chemicals remain in the system. There are windage losses where both water and chemicals are lost. As the process continues, solids increase. To keep the solids in desired level blow down is given from the system.

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Water evaporated is pure water and chemicals remain in the system. There are windage losses where both water and chemicals are lost. As the process continues, solids increase. To keep the solids in desired level blow down is given from the system.