Appeal No. 95-3119 Page 14
Application No. 08/089,810
rich flue gas into the chamber 20. The pipe 40 can also be
connected to an exhaust fan or the like for removing gases from
the chambers 20 and 22. An air inlet pipe 44 also extends
through the front wall 12 in communication with the lower
portion of the chamber 20 and is adapted to receive pressurized
air from an external source (not shown) and discharge same toward
the passage 28 to assist the movement of the acceptor from the
chamber 20 to the chamber 22.
In operation of Stewart's fluidized bed boiler, air is
introduced into the chamber 32 via the air inlet 36 whereby it
passes upwardly through the grate 26 and the bed 24 of fluidized
material in the chamber 22 before it exits through a suitable
outlet provided in the top of the boiler. This loosens the
particulate material in the bed 24 and fluidizes it. A light-off
burner 37 is then fired to heat the material in the bed 24 until
the bed reaches a predetermined elevated temperature after which
particulate fuel material is introduced into the chamber 22 and
the bed 24 via an inlet 46. Upon establishing good combustion
the burner 37 can be turned off. As soon as the bed reaches its
normal operational temperature, the raw limestone is introduced
into the chamber 20 via the inlet 38 where it accumulates in the
Page: Previous 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Next
Last modified: November 3, 2007