How are remaining non-condensable gases treated in a DA?

In the context of a Deaerator (DA), the correct handling of remaining non-condensable gases, such as air and other gases that do not condense with steam, involves both venting these gases and sometimes employing chemical treatments.

Venting is an essential process because non-condensable gases can accumulate in the deaerator, leading to corrosion and reduced efficiency in boiler operation. By venting, operators can ensure these gases are expelled from the system before they dissolve in the boiler feedwater.

Chemical treatments may also be used to further address any remaining non-condensable gases or to neutralize the effects of any corrosive gases. This dual approach—venting to physically remove gases and chemical treatment to manage any residual effects—is crucial for maintaining water quality and protecting equipment.

Other choices do not adequately address the complexities of managing non-condensable gases. For instance, relying solely on physical removal does not consider the need for chemical treatment in certain situations. Heating and cooling cycles, as well as simply increasing water temperature, might affect gas solubility but do not provide a comprehensive solution, as venting and chemical treatment do. This makes the combined method of venting and chemical treatment the most effective for treating remaining non-condensable