The superheater is located in a horizontal flue. Its function is to heat saturated steam coming out of the pot into superheated steam with a certain temperature. The purpose is to improve the economy of the power plant.
After the flue gas passes through the superheater, the temperature drops to 500~600℃ and then enters the tail flue.
One of the heating surfaces in the tail flue is the economizer.
It consists of a number of parallel coiled tubes that preheat the water before it enters the pan and reduce the temperature at which it is vented.
The other end heating surface is the air preheater.
Its function is to make the air heated to a certain temperature before entering the furnace, in order to improve combustion and further reduce the exhaust temperature, improve boiler efficiency.