Where does water exit the blowdown tank?

The exit point for water in a blowdown tank is located at the bottom or opposite the inlet. This design is intentional for several reasons. When water is being discharged from a boiler system, it often contains impurities and sediment that settle at the bottom of the tank. By allowing water to exit from the bottom, the blowdown tank facilitates effective removal of these impurities, ensuring that cleaner water can be retained within the system.

Additionally, positioning the outlet at the bottom helps in maintaining proper water levels within the tank and aids in the continuous flow of incoming water, which helps manage the pressure and temperature more effectively. This arrangement also reinforces the principle of allowing gravity to assist in the drainage of denser materials and impurities that may have settled, promoting operational efficiency and safety within the boiler system.

Other exit options, such as the top or side of the tank, would not serve this purpose as effectively, as they could allow sediment to remain in the tank or could lead to improper drainage, which could compromise the blowdown's efficiency and effectiveness. An overflow pipe typically serves a different function, acting as a safety mechanism to prevent the tank from overflowing rather than as a primary exit point for blowdown water.