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  • how does scale and sludge produced in the steam boiler

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  • Important Questions and Answers: Water Technology

    Formation of deposits: Scale and sludge formation. Scale: If the precipitate forms hard and adherent coating on the inner walls of the boiler is known as scale. It is formed by the substances like CaSO4, Mg(OH)2 and Ca(HCO3)2. Scales are difficult to remove even with the help of hammer and chisel. Scales are the main sources of boiler troubles.Get Price

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  • SCALE FORMATION AND CORROSION IN BOILERS, Journal of the

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  • EC: Lesson 11. Scale and sludge formation in boilers

    If the pH of the boiler water is higher than 11.5 and at the same time the boiler water is transparent, this fundamentally indicates the absence of sludge formation processes in the boiler. At the same time, if the pH of the boiler water is from 8.5 to 9.5 and the water is transparent in most cases this indicates an active scale formation in the boiler, and requires …Get Price

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  • UNIT-I- Water Technology

    11. Distinguish between sludge and scale. S.No Sludge Scale 1 It is soft, loose and slimy precipitate formed in the boiler during steam generation. It is hard, adherent coating formed on the inner walls of the boiler during steam generation. 2 The main sludge forming substances are MgCO 3, MgCl 2, MgSO 4 The main scale forming substances are Get Price

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