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Marine Water Tube Boiler
A boiler is used to heat feed water in order to produce steam. The
energy released by the burning fuel in the boiler furnace is stored (as
temperature and pressure) in the steam produced.
A double evaporation boiler uses two independent systems for steam
generation and therefore avoids any contamination between the
primary and secondary feedwater. The primary circuit is in effect a
conventional watertube boiler which provides steam to the heating coils
of a steam-to-steam generator, which is the secondary system. The
complete boiler is enclosed in a pressurised casing.