Inventors:
Paul S. Nolan - Fort Worth TX, US
Robert F. Kohl - Scottsdale AZ, US
Juergen Lauer - Maylene AL, US
Kerry Seitz - Southlake TX, US
Assignee:
Chemical Lime Company - Fort Worth TX
International Classification:
F27B 15/10
Abstract:
This invention relates to a method to further enhance NOreduction 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 NOemissions.