How are oxygen and non-condensable gases typically removed from feed water?

Heating the feed water is a well-established method for removing oxygen and non-condensable gases. When water is heated, the solubility of gases decreases, which causes them to be released from the water. This process is particularly effective because oxygen and other non-condensable gases become more volatile at elevated temperatures, allowing them to escape as the pressure of the gas bubbles increases during the heating process.

This technique is commonly applied in various systems, including boilers, to improve water quality and prevent issues such as corrosion that can arise from the presence of dissolved oxygen. While cooling, filtering, or circulating the water can have various benefits in water treatment processes, they are not effective methods for the specific task of removing oxygen and non-condensable gases from feed water.