FRESHWATER APPARATUS OF SEAWATER USING WASTE HEAT

摘要

A freshwater apparatus of seawater using waste heat is provided to reduce the total freshwater production cost through the reduction of the steam amount by heating a portion of brine using waste heat recovered from an electricity generating system and flowing the heated brine into a brine chamber of a stage part. In a freshwater apparatus of seawater comprising: an evaporator(1) including a stage part(10) divided into a heat recovery area and a heat rejection area and constructed in a multistage; and a brine feeding pump(40) for feeding brine into a seawater feeding pipe(30) which passes through a brine heater(20) via the stage part, and is connected into a first stage(11), the freshwater apparatus further comprises: a freshwater duct(50) crossing from stages of the heat recovery area to stages of the heat rejection area in the stage part; a waste heat recovering steam generator(60) to which freshwater recovered from the freshwater duct is sent such that the freshwater is heat exchanged; a freshwater recovering pipe(70) connected to the waste heat recovering steam generator to send the heat exchanged freshwater to the first stage of the heat recovery area; a freshwater circulating pump(80) installed on a predetermined location of the freshwater recovering pipe; a flow control valve(90) installed in front of the freshwater circulating pump on the freshwater recovering pipe; thermometers(92) installed in front and rear of the waste heat recovering steam generator; and a flow meter(94) installed in rear of the brine feeding pump.