SEAWATER DESALINATING APPARATUS USING BLOWDOWN OF HEAT RECOVERY STEAM GENERATOR

摘要

A seawater desalinating machine is provided to supply middle pressure steam generated through a flash vessel and mix hot water remained in the flash vessel with seawater discharged from a seawater heater by using blowdown of a heat recovery steam generator. In a seawater desalinating machine comprising a vacuum system for heating brine in a seawater heater(4) by using low pressure steam received from a low pressure steam turbine(2) of a combined cycle power plant through a low pressure steam line(3), passing the brine through each stage of a multi-evaporation process plant through a seawater line(14) to generate flash, thereby produce distillate, sending the distillate to a distillate line(6), and receiving middle pressure steam from a back pressure steam turbine(7) through a middle pressure steam line(12) to form vacuum using an ejector(8), the seawater desalinating machine produces middle pressure steam in a flash vessel(11) using blowdown of a heat recovery steam generator(10) of the combined cycle power plant, supplies the middle pressure steam to the middle pressure steam line, and mixes hot water(13) with heated brine discharged from the seawater heater through a seawater line(14) when the hot water is remained after producing middle pressure steam in the flash vessel.