Appeal No. 95-3119 Page 13
Application No. 08/089,810
extending between the partition and the rear wall 14. Stewart
teaches that a bed of particulate material 24 is disposed within
the chamber 22 and rests on a perforated grate 26 extending
horizontally in the lower portion of the boiler and defining the
lower extremities of both chambers 20 and 22. The lower
extremity of the vertical portion 18a of the partition 18 can
terminate slightly above the grate 26 to form a through passage
28 that permits transfer of material from the chamber 20 to the
chamber 22. Alternatively, Stewart discloses that holes can be
provided in the lower portion of partition 18 for the same
effect. The fluidized bed boiler also includes two air plenum
chambers 30 and 32 disposed immediately underneath the chambers
20 and 22. Stewart provides an inlet pipe 38 through the front
wall 12 to introduce into the chamber 20 an acceptor, such
as raw limestone, for the sulfur produced by the fossil fuel
during the combustion process. Stewart teaches that this
acceptor would be in the form of a particulate material which
would accumulate to a preselected height, such as the one shown
in Figure 1, in the chamber 20. In addition, a gas inlet pipe 40
extends through the wall 12 into the chamber 20 for passing a
high temperature gas, a combustible gas, or carbon dioxide
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Last modified: November 3, 2007