TYPES OF HIGH PRESSURE BOILERS ,WORKING PRINCIPLE OF BENSON BOILER ,MERITS AND DEMERITS ,APPLICATIONS
High Pressure Boilers : There are two types of High pressure boilers are as follows. 1. Benson Boiler 2. Lamont Boiler FIGURE 1: BENSON BOILER Construction 1. Air Preheater : It preheats the air before entering into the furnace. The preheated air increases the burning efficiency of the fuel. 2. Economiser: It heats the water to a certain temperature. 3. Radiant Superheater : It is super heater which heats the water with radiation produced by the burnt fuel. It raises the temperature to supercritical temperature. 4. Convection Evaporator : It evaporates the superheated water and converts them into steam. It does so by the convection mode of heat transfer to the water from the hot flue gases. 5. Convection Superheater : It superheats the steam to the desired temperature (nearly 650 degree Celsius). 6. Furnace: It is the place where the fuel is burnt. 7. Feed Pump : It is used to supply the water inside the boiler at supercritical pr...