What is the purpose of boiler blowdown?

The purpose of boiler blowdown is to remove impurities and maintain water quality in a boiler. Over time, minerals, sediment, and other impurities can accumulate in the boiler water due to the heating process and the source water's characteristics. If left unchecked, these impurities can lead to several issues, including scale buildup, corrosion, and reduced efficiency of the boiler.

Blowdown involves intentionally draining a portion of the water from the boiler to reduce the concentration of dissolved solids. By regularly performing blowdown, operators can ensure that the water quality remains within acceptable limits, enhancing the boiler's performance and lifespan.

Additionally, other options focus on functions unrelated to the primary goal of maintaining water quality. Increasing steam pressure relates to operational adjustments, while testing the strength of materials is a separate maintenance concern. Regulating the temperature of steam is related to the efficiency of heat transfer rather than water quality management. Thus, the primary role of blowdown is directly linked to water impurity removal and maintaining the quality of water in the boiler.