Power Plant Boilers: Startup and Shutdown

Describe basic checks that boiler operators make during an initial pre-startup walk-through. Describe typical procedures for a cold startup of a controlled circulation drum type boiler. Describe basic preparations for lighting off the furnace how light-off is initiated and how a typical boiler is warmed up. Describe how pulverizers are started up and controlled. Describe how the main coal burners are ignited and controlled. Describe the basic procedures for shutting down a typical drum-type boiler. Describe the basic differences and similarities between the operation of a once-through boiler and a drum-type boiler. Describe how a steam/water separation system is used during the startup and the shutdown of a once-through boiler.