Which of the following indicates the correct order in the path of
A. Boiler, Superheater, economizer
B. Air preheater, economizer, superheater
C. Air preheater, economizer, chimney
D. No definite order
Please scroll down to see the correct answer and solution guide.
Right Answer is: A
SOLUTION
Concept:
Correct path of flue gases from boiler furnace to chimney is:
Boiler → Superheater → Economiser → Air preheater → ID fan → Chimney
Superheaters: It is used to dry the wet steam and raise the temperature of the steam above its saturation temperature. It is generally placed in the path of the furnace gases so as to utilize the heat from the hot flue gases.
Economizer: It is also known as a feedwater heater. It is a device in which the waste heat of the flue gases is utilized for heating the feed water.
Air Preheater: It is used to increase the temperature of the air before it enters the furnace. It is generally placed after the economizer; so that the flue gases pass through the economizer and then to the air preheater.
