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Marine Boiler Combustion Process - Arrangement & Supply of Fuel Oil
Marine boilers generally burn residual low-grade fuels. This fuel is
stored in double-bottom tanks from which it is drawn by a transfer
pump up to settling tanks. Here any water in the fuel may
settle out and be drained away.
The oil from the settling tank is filtered and pumped to a heater and
then through a fine filter. Heating the oil reduces its viscosity and makes
it easier to pump and filter. This heating must be carefully controlled
otherwise 'cracking' or breakdown of the fuel may take place. A supply
of diesel fuel may be available to the burners for initial firing or
low-power operation of the boiler.