We are leading manufacturers and suppliers of Fresh Water Generators.
The basic principle is the vacuum evaporation in vertical tubes utilizing water from any Waste Heat Recovery, so as Diesel Engines, Steam Turbines or Steam Boilers for production of fresh water with a low salinity (less 5 ppm).
The heating media, being engine cooling water, boiler / turbine water, or the like (possible steam) is led to the heat exchanger, which is the lower part of the generator.
At the cross current of the heating medium around the vertical nest of pipes, the heat is transferred to the sea feed water, which is supplied at the bottom of the heat exchanger.
The heat exchanger tubes are fed with sea water which then is heated under a vacuum to an evaporating temperature of 45° to 80° C.
The sea water, during the evaporation process, is drawn to and up the inside of the heat exchanger tubes creating a raising film. The raising film, caused by the vapour force, forms a large evaporation surface and protects the tubes against boiling dry which would cause scale formation.
In order to eliminate the risk of scale formations completely, Shreyans offers a complete and simple chemical dosing unit, which easily can be connected to the feed-water connecting branch at the bottom of the heat exchanger. The consumption and costs of this harmless chemicals are insignificant. Pre-treatment of the feed water or disinfection is not necessary.
The evaporating process, which can be observed through an inspection glass in the upper part of the generator, the separator, will be protected by a circular baffle plate (Deflector) with a bilge placed immediately over the heat exchanger. Droplets from the evaporating process will with this arrangement be separated off and through a number of pipes installed on the bilge led to an outlet at the bottom of the separator together with the non-evaporated and concentrated saline water, the brine. The salinity of the vapour is further reduced in the separator chamber, due to a considerable reduction of the speed of the saturated vapour resulting in the small liquid particles, which have been carried along, being separated by gravity.
From this reservoir the distillate is drawn out of the separator by a freshwater pump which sends along distillate through the salinity sensor and the water meter. In case of too high salinity the sensor will by-pass the distillates up into the separator again by activating a solenoid valve. The salinity can be read on the TDS meter.
The capacities range from 10 to 100 m3 /24 h is covered by seven different sizes of the single-effect Freshwater Generator, ensure the most reliable and economic solution to any demand for supply of high-quality freshwater on board type of vessel.
Product Details
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Usage/Application
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Water Purification
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Brand
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Shreyans
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RO Capacity
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10KLD to 100KLD
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Purification Type
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Heat Transfer/Evaporation
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Material
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MS/SS
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Automation Grade
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Semi-Automatic
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Power Source
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Elelctric
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