Process for incinerating domestic refuse in a fluidized bed furn

Details Process for incinerating domestic refuse in a fluidized bed furn Process for incinerating domestic refuse in a fluidized bed furn

1991-11-01

1992-08-18

Favors, Edward G.

Furnaces

Process

Incinerating refuse

110245, 110345, 122 4D, F23G 500

Patent

active

051389584

ABSTRACT:
A process for incinerating domestic refuse is implemented in a boiler comprising a fluidized bed furnace over which is a post-combustion chamber. The smoke passes through alternately upward and downward paths in which it is cooled in contact with walls provided with water tubes. Limestone is injected into the bed to fix the sulfur oxides and halogenated compounds and a jet of powdered lime is injected at the start of the third path to neutralize the remaining halogenated compounds; the flying particles deposited are recycled into the furnace. The temperature of the bed is held between 800.degree. C. and 900.degree. C. and the injection of secondary air is adjusted to obtain an oxygen concentration in the smoke between 5.5% and 7.5% to minimize the formation of nitrogen oxides, dioxins and furans.

REFERENCES:
patent: 4422410 (1983-12-01), Lake et al.
patent: 4913097 (1990-04-01), Derksen et al.

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