Thermal Deaerator (Rotating Film Deaerator) is a new type of thermal deaeration unit that can remove dissolved oxygen and other gases from the feedwater in the thermal system, preventing corrosion of thermal equipment. It is an essential device for ensuring the safe operation of power plants and industrial boilers. The Thermal Deaerator is a new type of thermal deaerator that can operate under fixed pressure, sliding pressure, and negative pressure modes. It features high allowable dissolved oxygen content in the incoming water, low incoming water temperature, and large make-up water volume. It is suitable for deaeration of water used in power plant boilers, industrial boilers, and make-up water in thermal power plants.