Design and Application of Low Temperature Economizer of 200 MW Coal-fired Boiler

Aiming at the reconstruction project of exiting flue gas at low temperature of 200 MW coal-fired boiler, the paper summarizes key points in design and installation of the low temperature economizer reconstruction project. In addition, the paper conducts a comparative analysis in accordance with operation data and practical design to verify the reasonableness of cascade use of waste heat of low-temperature exiting flue gas, providing experience for the application of low-temperature economizer; also, it proposes the orientation for the further development of low-temperature economizer.