20T day  reverse osmosis marine  fresh water generators

Main techinical paramenter for FRESH WATER GENERATOR,

Distillate produced :20 t/d

Heat consumption: 585kw

Residual salt content less than 10 ppm NaCl

Distillate temperature:  abt.42 0C

Sea water quantity :  60m3/h

Sea water pump suction pressure >0bar

Max. Sea water temperature : 32 centigrade

Total dissolved solids ;  35000 ppm

Feed water :  2500 l/h

General

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 0C sea water and 75 0C cylinder

jacket cooling water. Under such circumstance, the unit can reach distillate production capacity of

20 t/d. Each unit consists of a condenser and an evaporator installed in a same chamber.

Characteristics of Fresh Water Generator:

T he plant is a packaged unit, which is mounted on a base frame. All components and accessories

such as fresh water pump, interconnecting pipe-work as well as inner cable are connected prior to

delivery.

The sea water pump independently supplied for on-site installation on board, which is to be

positioned under the light ballast line.

Technical Specification

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.