What is the purpose of boiler blowdown?

The purpose of boiler blowdown is primarily to remove impurities from the water. Over time, minerals and other contaminants can concentrate in the boiler water due to evaporation and the constant heating process. If these impurities are not regularly removed, they can lead to issues such as scaling, corrosion, and operational inefficiencies. By performing blowdown, some of the water in the boiler is drained off, allowing for the removal of these concentrated impurities. This process helps maintain the overall water quality within the boiler, ensuring efficient operation and prolonging the life of the boiler system.

Although maintaining steam quality and managing pressure can be considerations in boiler operation, the direct function of blowdown is to control the concentration of impurities, making the removal of contaminants the most accurate choice in this context.