mÉtodo de aumento de controle de emissÕes de nox em fornos de mineral preaquecedores rotativos

摘要

This invention relates to a method to further enhance NO_x reduction 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 NO_x emissions.