B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
110/15, 9/37, 23
B01J 8/24 (2006.01) D21C 11/06 (2006.01) D21C 11/12 (2006.01) F22B 31/00 (2006.01) F23G 5/30 (2006.01) F23G 5/46 (2006.01) F23G 7/04 (2006.01)
Patent
CA 2033713
APPARATUS AND METHOD FOR RECOVERY OF CONSTITUENTS AND HEAT FROM FLUIDIZED BED COMBUSTION ABSTRACT OF THE DISCLOSURE An apparatus and method for recovering constitu- ents and/or heat energy from a fluidized bed combustion process utilizes a single vessel (20) which combines a combustor (22) for fluidized bed combustion of a chemical mixture fed therein and a heat exchange section (24). Characteristics of the fluidized bed (36) are controlled by withdrawing an appropriate portion of the larger, unburned constituent particles from the bottom of the combustor (22), and smaller constituent particles are withdrawn by becoming entrained within the gases of combustion and being trans- ported to the heat exchange section (24). The smaller particles are separated from the gases without the use of a cyclone separator and accumulate as another fluidized bed in the heat exchange section (24) where heat is adsorbed from the particles for recovery purposes and to cool the parti- cles. A portion of the cooled particles is then recirculat- ed to the combustor (22) by, for example, pneumatic trans- port methods for controlling the operating temperature of the combustion process. The apparatus is particularly well-suited for recovering process salts and heat energy from the burning of black liquor effluent from a lignocellu- losic pulping process.
Miserlis Constantine D.
Rosenblatt Ivan L.
Sheely Harold R.
Gowling Lafleur Henderson Llp
International Paper Company
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