F - Mech Eng,Light,Heat,Weapons – 23 – C
Patent
F - Mech Eng,Light,Heat,Weapons
23
C
F23C 10/28 (2006.01) F22B 31/00 (2006.01) F23C 9/00 (2006.01) F23C 10/02 (2006.01) F23J 15/02 (2006.01) F23C 11/02 (1990.01)
Patent
CA 2115434
ABSTRACT OF THE DISCLOSURE The invention concerns a method and a device in the cooling of the circulating material in a fluidized-bed boiler. In the method the fuel is introduced into the circulating-powder combustion chamber of the fluidized-bed boiler into the lower part of the circulating-powder combustion chamber and an inert circulating material, which contains a proportion of unburned powdered fuel, is circulated from the top part of the circulating-powder combustion chamber to the lower part of the circulating- powder combustion chamber. The flue gases are passed in the method from the powder separator along the duct into the exhaust-gas boiler, through whose heat exchanger thermal energy of the flue gases is transferred further to other useful use. In the method, part of the cooled flue gases are recirculated along the duct into the circulating material and, by means of the cooled flue gases, the capacity of cooling of the fluidized-bed furnace is regulated by affecting the temperature of the circulating material.
Imatran Voima Oy
Marks & Clerk
LandOfFree
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