Abstract:

In order to fully exploit the potential of the lowlow temperature economizer on flue gas waste heat recovery to save the energy of steam turbine, equivalent enthalpy drop method is used to calculate the coal saving of dualway water intake and the dualway water return  lowlow temperature economizer under various working condition, based on operating parameters of a unit after transformation. Then the coal saving curve of lowlow temperature economizer of this type under variable working conditions and the most economical return water switching method can be obtained. It can provide debugging and operation reference for units with the same type of lowlow temperature economizer.

Key words:

lowlow temperature economizer, lowpressure heater, coal saving, economic operation, equivalent enthalpy drop method