Abstract
This chapter discusses the factors that lead to the fouling and corrosion of various components of boilers and also the methods that lead to the smooth and risk-free operation of boilers. Boilers are classified according to their use, pressure, materials of construction, tube content, firing mode, and heat source. Generally the two types of boilers that are designed are fire-tube boilers and water-tube boilers. The circulation in steam water circuits is either (a) natural or (b) forced circulation. In the case of forced circulation boilers, a pump facilitates water circulation. This system is important when boilers operate over a wide range of capacity. The term “water conditioning” refers to the treatment of water by chemicals, change of pH, and mechanical measures to prevent corrosion in boilers. The three types of water that are encountered after water treatment are raw water supply, condensate returned from steam turbines, and boiler water.
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