Evaluation of reclaiming technology for gas-fired boiler flue gas residual heat

A series of calculations were carried out to explore the thermal efficiency performance during flue gas condensation based on the natural gas boiler model,the relationships of gas thermal efficiency with flue gas-temperature,air factor were discussed.It was meaningfully to recover the flue gas thermal energy when the flue gas temperature reached the dew point of flue gas,which could be implemented by adding a condensation energy heat-exchanger,the structures of condensing heat transfer equipment were discussed on heat transfer,flow resistance and Iow temperature corrosion.