Boilers and Steam Generators

This chapter talks about the equipment used for in the Rankine thermodynamic process and the basics of feedwater heater level control. There are two main parameters to control to ensure the performance of the feedwater heater. The first parameter to monitor is the heat transfer capability of the heat exchanger and the second parameter to monitor is the feedwater heater level to ensure the shell side level remains at the normal level. Energy in the feedwater heater is being transferred from the extraction steam system to the feedwater system. The condensate pumps and boiler feed pump supply feedwater into the boiler to the main steam drum. Exhaust gases from the boiler in the back pass section preheat this water in the economizer section prior to the feedwater entering the steam drum. The water in the steam drum is in saturation conditions for the operating pressure and temperatures of the boiler.