Seawater desalinating apparatus using blowdown water of heat recovery steam generator

摘要

The invention relates to a seawater desalinating apparatus using blowout water of a heat recovery steam generator (25) which includes a brine heater (4) to heat brine with a low pressure steam from a low pressure steam turbine (2) of a combined cycle power plant (1), in which the brine is subjected to flashes generated while passing through respective stages via a seawater line (14) to produce desalinated water, a desalinated water line (6) to receive the desalinated water, and a vacuum system including an ejector (8) to generate vacuum with a medium pressure steam from a back pressure steam turbine (7) through a medium pressure steam line (12). The apparatus further includes a flash vessel (11) to generate the medium pressure steam by use of blowout water of a heat recovery steam generator (25), to supply the medium pressure steam to the medium pressure steam line (12), and to mix hot water remaining after generation of the medium pressure steam with seawater discharged from the brine heater (4).