8
Feed Water Treatment
Contents
8.1 Feed water system – necessity
8.2 Feed water treatment
8.3 Questions
8.1 FEED WATER SYSTEM – NECESSITY
With the invention of modern high-pressure boilers, it has become a necessity to supply feed water without any impurities. Natural water contains impurities in colloidal or suspension form in addition to dissolved impurities. Major impurities found in colloidal or suspension form include mud, silt, clay, silica, etc., and that found in the dissolved form include carbonates, bicarbonates, phosphates and sulphates of calcium, magnesium, sodium and gases such as CO2 and O2.
These impurities when operated at high pressure get deposited on the heat transfer surfaces, thereby reducing the rate of heat transfer. ...
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