Descaling/Chemical cleaning is more effective as the removal of inorganic and organic foulants from process lines, equipments, surface etc. Cleaning should be a combination of three elements i.e. Solvents (acid,alkali,surfactant), Fluid velocity (Stirring, spraying, agitation,air rumbling and steam addition etc) Heat (Hot water or hot surface). Cleaning is divided into two categories:
Preoperational cleaning and routine maintenance cleaning.
A complete descaling/cleaning practice should consists of safe and uniform cleaning of deposit (scaling/rust) from the heat transfer surfaces without metal corrosion during cleaning procedure. Descaling program includes scale softening, uniform & fast cleaning followed by proper passivation.
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