9. Air and Flue Gas System (P&IDs)
In this part in addition to Air ( Primary & Combustion ) & Flue gas, outline of pulverizer instrumentation shall be covered.
9.0. Air and Flue Gas System
In the air and flue gas system, the draft section of boiler plays the most vital role in the performance and firing of boilers It encompasses not only both air and fuel (mill) supply, but also covers the burning of fuel in the furnace and the flue gas it produces. There are classifications of various air in the boiler, such as primary, secondary, combustion, scanner, or seal. Each of these types of air has a specific function to perform and their main purposes are listed below.
Primary air (PA): Air that comes to the furnace along with the fuel, such as pulverized ...