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

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

1998-07-17

2000-02-01

Jeffery, John

Liquid heaters and vaporizers

Miscellaneous

122 6A, 423235, B09B 300

Patent

active

06019068&

ABSTRACT:
An apparatus for reducing the concentration of nitrogen oxides in flue gases produced in a furnace of a combustion unit includes a device for maintaining combustion reactions in the furnace, the combustion reactions resulting in the production of hot gases containing nitrogen oxides, the hot gases flowing mainly upwardly within the furnace, internal heat transfer surfaces within the furnace for recovering heat from the mainly upward flow of hot gases, an introducer for introducing nitrogen oxides reducing agent into the upward flow of hot gases in the furnace, for reducing the concentration of nitrogen oxides in the hot gases, wherein the introducer is integrally connected to the internal heat transfer surfaces, for keeping the temperature of the reducing agent at a sufficiently low temperature level upon introduction thereof into the furnace, and for efficiently mixing the reducing agent with the upward flow of hot gases, and a discharge for discharging flue gases from the furnace.

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patent: 5094191 (1992-03-01), Garkawe et al.
patent: 5342592 (1994-08-01), Peter-Hoblyn et al.
patent: 5441714 (1995-08-01), Oakes et al.
Kohl, et al., "Gas Purification", 4th Edition, Gulf Publ., Houston, TX, p. 777, ISBN 0-87201-314-6.

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