Solid Handling Systems for Fluidized Beds
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Solid Handling Systems for Fluidized Beds book
The functionality of ﬂuidized bed equipment is limited by its fuel feed system. A major fraction of
the interruptions in the operation of a ﬂuidized bed unit can be attributed to the breakdown of its
feed system. This system is vulnerable, especially for biomass or when the solid fuel picks up an
excessive amount of surface moisture from rain or snow while lying in an outdoor stockyard. A
ﬂuidized bed plant feeds the fuel into the furnace or gasiﬁer directly after crushing without drying
or pulverizing it as is done in a pulverized coal-ﬁred (PC) boiler. Thus, a blockage could easily
occur either in the fuel bunker or in the feeder itself due to the surface moisture of the fuel.
Excessive ﬁnes in the fuel also reduce its mobility interrupting the boiler operation.