Method of reducing NO x emissions in rotary preheater...

Details Method of reducing NO x emissions in rotary preheater... Method of reducing NO x emissions in rotary preheater...

2008-05-27

2008-05-27

Wilson, Gregory A (Department: 3749)

Heating

Processes of heating or heater operation

Including passing, treating or conveying gas into or through...

C110S246000

Reexamination Certificate

active

11498558

ABSTRACT:
This invention relates to a method to further enhance NOxreduction in rotary preheater mineral kilns by coupling the temperature control and gas composition uniformity afforded by the high temperature mixing with the use of chemical reducing agents. The chemical reducing agent or agents, generally chosen from ammonia or ammonia precursors, are introduced at a specific point in the rotary preheater kiln which has as an optimal temperature window to achieve the greatest reduction of NOxemissions.

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