The feasibility and economic of reconstruction of condenser making up water model were analyzed when the unit running during straight condensing condition in summer

the economic benefits brought from it were calculated by principle of equivalent enthalpy. After the transformation

desalting water of make-up water meet initial oxygen effects

enhances the deaerator operating stability

and exhaust steam of unit exhaust hood play a role in cooling and condensation

vacuum of unit operation is improved

economy of unit operation is improved.