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Double evaporation boilers working procedure

Water tube boiler functional requirement
Water tube boiler

Fig: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.



Related Info:

Marine steam turbines operating procedure

The steam to steam generator



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