Method of controlling combustion in fluidized bed incinerator

Details Method of controlling combustion in fluidized bed incinerator Method of controlling combustion in fluidized bed incinerator

F - Mech Eng,Light,Heat,Weapons

23

N

110/2.1

F23N 3/00 (2006.01) F23C 5/00 (2006.01) F23G 5/00 (2006.01) F23G 5/30 (2006.01)

Patent

CA 1307977

METHOD OF CONTROLLING COMBUSTION IN FLUIDIZED BED INCINERATOR ABSTRACT OF THE DISCLOSURE In a fluidized bed incinerator for burning matter to be incinerated charged into a furnace by causing fluidization of a fluidizing medium with the assistance of air fed from the lower portion of a fluidized bed, a combustion control method is arranged such that: the combustion rate of matter for incineration in the furnace is detected by a combustion rate detecting means, and, when the combustion rate exceeds a predetermined level the amount of air fed from the lower portion of the fluidized bed is reduced:L and, simultaneously, the amount of air blown into a space above the fluidized bed is increased so as to control and maintain the combustion rate of the matter to be burnt in the furnace at the predetermined level and to suppress fluctuations in the amount of combustion air, the amount of exhaust gas, the oxygen concentration in the exhaust gas and the amount of gas remaining unburnt or the like. The combustion control method is also applicable to a fluidized bed incinerator constructed to include a plurality of air chambers formed at the lower portion of the fluidized bed, through which chambers the air is fed into the in- cinerator and the combustion rate of matter for incineration is controlled by regulating the amount of air fed from the air chamber disposed at the portion where the matter charged is dropped.

581671

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