7T/D Marine Fresh Water Generator FWG
Fresh water generator on ship is sea water desalination device, it is widely use on ships such as ocean-going vessels, fishing vessels etc. The desalinated water is generally used for domestic, industrial, power plant, boiler etc, it is evaporated less than 10ppm.
Based on the general design scheme, the Fresh Water Generator which mainly consists of evaporating and condensing chambers, ejector equipped for vacuum, as well as relevant accessories for the system. Furthermore the whole control system is to be designed as maker standard in according to our design purpose. Subject salinity meter is exclusively composed by maker, the design scheme concludes with temperature compensation. The system designed under rough sea condition. That is for 32 0 C sea water and 75 0 C cylinder jacket cooling water. Under such circumstance, the unit can reach distillate production capacity of 5 t/d. Each unit consists of a condenser and an evaporator installed in a same chamber.Features
.Compact design for installation flexibility
.High standard titanium used for evaporator and condenser
.Compatible with a variety of heating course
.Standardized parts for easy maintenance
Theory description: The sea water enters the plant at the condenser for cooling the water vapor, flows through the condenser. Then a little quantity is fed into the evaporating chamber and about half of them evaporating to vapor, the sea water is heated by the cylinder cooling water of main engine. The rest quantity of sea water is led to the brine/air ejector, where brine and air is take off, and was discharged to overboard. The pressure inside the chamber is less than atmosphere (vacuum), in this way the evaporating temperature usually is lower than 45 degree. The vapor rises from the evaporating chamber, which flows through the demister where brine mist is removed, and pure steam condensed to liquid in the condenser.
FRESH WATER GENERATOR, FWG-7
Distillate produced 7 t/d
Heat consumption 150kw
Residual salt content less than 10 ppm NaCl
Distillate temperature abt.42 0 C
Sea water quantity 15 m3/h
Sea water pump suction pressure >0bar
Max. Sea water temperature 32 0 C
Total dissolved solids 35000 ppm
Feed water 625 l/h HEATING MEDIUM, jacket water
Quantity 15 m3/h
Operating pressure<4 bar
Inlet temperature 75 to 90 0 C
Temperature drop<12 0 C EJECTOR, sea water
Sea water quantity 15m3/h
Outlet back-pressure<0.7 bar
Inlet pressure >3.5 bar DIMENSIONS AND WEIGHT OF THE UNIT
Dimension: LxWxH According to drawing
Weight in operation Approx.550kg
Sea water supply pump is only loose part which will be installed independently in proper position.
Control cabomet with embedded salinity meter directly fitted on the body of the unit and the cabinet also can be arranged separately in where convenient for operation.*Wide range of production capacity.
*Compact design for easy installation.
*Standard parts for convenient replacement by crews.
*Highly compatible to variety heating sources:
Steam heating block, hot water, thermal oil heating block
Working Principle Drawing