What system in a boiler is involved with the introduction and regulation of air?

The draft system is crucial in a boiler as it manages the introduction and regulation of air necessary for the combustion process. Proper air supply is vital for efficient fuel combustion, which in turn affects the boiler's overall performance and efficiency. The draft system includes components such as fans, dampers, and vents, which work together to create the necessary airflow to support combustion.

An adequate supply of air ensures that fuel burns completely, minimizing unburned fuel and reducing the generation of pollutants. If too much or too little air enters the system, it can lead to incomplete combustion, which adversely affects efficiency and can cause safety hazards due to the production of carbon monoxide and other harmful emissions.

The other systems mentioned, such as the flame system, feed water system, and fuel system, play significant roles in the operation of a boiler but do not specifically focus on the introduction and regulation of air. The flame system pertains to the ignition and maintenance of the flame once combustion has been initiated, the feed water system is responsible for delivering water to the boiler to generate steam, and the fuel system manages the supply of fuel to the combustion area. Each of these systems is important, but the draft system is specifically tasked with managing air introduction and regulation.