Method and an apparatus for injection of NO.sub.x reducing agent

Details Method and an apparatus for injection of NO.sub.x reducing agent Method and an apparatus for injection of NO.sub.x reducing agent

1996-09-27

1998-10-13

Straub, Gary P.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Nitrogen or nitrogenous component

B01D 5356

Patent

active

058208380

ABSTRACT:
The present invention refers to an improved method and an improved apparatus for reducing the concentration of nitrogen oxides in flue gases produced by the combustion of carbonaceous fuel in combustion units having a furnace with a fluidized bed of solids therein. Hot gases produced within the furnace flow mainly upward within the furnace. Heat is recovered from the hot gases and hot solid material by heat transfer surfaces within the furnace. A nitrogen oxides reducing agent is introduced into the furnace through injection means integrally connected to the heat transfer surfaces, for keeping the temperature of the reducing agent at a sufficiently low temperature level at the introduction thereof and for efficiently mixing it with the mainly upward flowing hot gases.

REFERENCES:
patent: 3900554 (1975-08-01), Lyon
patent: 4115515 (1978-09-01), Tenner et al.
patent: 4181705 (1980-01-01), Gumerman
patent: 5094191 (1992-03-01), Garkawe et al.
patent: 5342592 (1994-08-01), Peter-Hoblyn et al.
Kohl et al. "Gas Purification" 4th Edition, Gulf Publishing Co., Houston TX USA, p. 777, ISBN 0-87201-314-6, 1985 No Month.

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