PH PHENOMENA IN COOLING WATER

摘要

A thorough evaluation of scale potential in water treatment should include the impact of temperature on pH as well as solubility product for pH sensitive scales such as calcite. Scale formation is a reaction. An evaluation of the impact of temperature on all reactant parameters should be performed. Old rules of thumb may not adequately describe the impact of temperature on scale potential. The methods and chemistry outlined in this paper should be applied to all pH sensitive scales in an evaluation, including calcium phosphates and where applicable, iron carbonates, barium carbonates plus any other mineral scales deemed relevant. The correction of pH for temperature and solution effects is not new technology, but it has become overlooked technology that could allow increased cycles and improved water reuse when applied to scale potential and control evaluations.