Thermal Deaerator (Rotating Film Deaerator) is a new type of thermal deaeration device that can remove dissolved oxygen and other gases from the water in the thermal system, preventing corrosion of thermal equipment. It is an essential piece of equipment for ensuring the safe operation of power plants and industrial boilers. The Thermal Deaerator is a new type of thermal deaerator, capable of operating under constant 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 for thermal power plants.