techniques of analysis of water hardness in coal power boilers

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Boiler Water Treatment Guidelines; Columbia Boiler Co

The alkalinity of boiler water should be sufficiently high enough to protect shell and plates against acidic corrosion but not high enough to produce carryover. A minimum value for alkalinity for adequate protection is 200 PPM. High boiler alkalinity which is in excess of 700 PPM should be avoided. Values higher than this can lead to embrittlement of the steel. Phosphates. Phosphates are used to react with

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Feed water treatment - SlideShare

1. Scale Formation The concentration of dissolved salts in the hard water increases progressively due to continuous evaporation of water in boiler and finally these salts are precipitated on the inner walls of the boiler. The precipitated matter forms a hard adhering coating inside the boiler

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