The purpose of a boiler blowdown is to remove accumulated solids, sludge, and scale-forming minerals from the boiler water. As the boiler operates, impurities in the water, such as calcium, magnesium, and silica, concentrate. These impurities can precipitate out of the water and form scale on the heat transfer surfaces of the boiler. Scale acts as an insulator, reducing the efficiency of heat transfer and increasing fuel consumption. Sludge is a soft, muddy deposit that can also accumulate in the boiler, hindering heat transfer and potentially clogging pipes and valves. High levels of dissolved and suspended solids can also....
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