What is the function of the draft inducer in a boiler?

The function of the draft inducer in a boiler is primarily to ensure proper combustion air flow to the burner. This is critical for efficient combustion, as it allows the necessary air to mix with the fuel being burned. Adequate airflow is essential to maintain steady combustion, which in turn optimizes the efficiency of the boiler and reduces emissions of harmful gases.

When the draft inducer operates, it creates a negative pressure that effectively pulls air from the surrounding environment into the combustion chamber. This not only supports a stable flame but also helps remove combustion gases from the boiler, promoting safer operation. Without sufficient draft, combustion can become unstable, potentially leading to incomplete combustion and the associated production of harmful byproducts, such as carbon monoxide.

The other functions described do not relate to the draft inducer’s primary role. Increasing the temperature of the steam pertains to the heat exchange processes within the boiler; maintaining water levels is related to the water management systems; and reducing pressure involves safety and control measures within the boiler system. Each of these areas is important, but they do not involve the specific task performed by the draft inducer.