Рет қаралды 30,850
How it works
JWP freshwater generator equipment
The Alfa Laval JWP unit consists of a fresh water generator, including titanium plate heat exchangers for evaporator and condenser, generator shell, two-stage brine/air ejector, freshwater pump, freshwater control sensor and frame.
Operating principle
The feed water to be distilled is taken from the flow of seawater coolant from the condenser outlet (1). It enters the evaporator (10) where it evaporates at approximately 40° to 60°C as it passes between plates that are heated by the heating medium.
The evaporating temperature corresponds to a vacuum of 85-95%, maintained by the brine air ejector (not shown). The vapours generated pass through a demister, where any drops of seawater entrained are removed and fall due to gravity to the brine sump in the bottom of the generator chamber. The clean freshwater vapours continue to the condenser (9), where they condense into freshwater as they pass between the cold plates cooled by the cooling water.