Superheater is usually embedded in the boiler bank. There are other types like vertical ‘S’ type drainable. There are several types of superheaters employed in water tube package boilers. So leak proof casing is very much required to arrest gas leakage into boiler room. Most of these boilers operate under positive pressure on gas side as there are provided only with FD fan and no ID fan. ‘D’ type furnace is widely used compared to other configurations. Most of the heat transfer occurs in the furnace in the form of direct radiation. ‘D’ type boilers are most widely used.įurnace is usually membrane walled and gas tight. There are several types of water tube package boilers based on shape of the boiler like, ‘D’ type, ‘O’ type, ‘A’ type etc. The boiler consists of furnace, bi-drum boiler bank and economizer and sometimes an air heater. Fuel is fired in the furnace with the help of burners. These are shop assembled and bi-drum boilers. Brief Description of Water tube package boilers
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