Assessment of Nitrogen Oxide Formation in Preheated High-Temperature Combustion Air in Industrial Processes

摘要

To assess the impact of high-temperature burner duct recuperator (HTBDR) technology on air quality information was reviewed on nitrogen oxide (NO/sub X/ formation in burners using high-temperature combustion air. Increasing combustion air temperature increases burner efficiency, but also generally increases NO/sub X/ formation. Information was gathered on regulations and standards for NO/sub X/ emission, industrial burner technology, NO/sub X/ formation as a function of burner design and combustion air temperature, and the role of computer modeling in low-NO/sub X/ burner design. The report summarizes previous work on laminar and turbulent diffusion flames, staged combustion, kinetics and mechanism of NO/sub X/ formation, the addition of steam to combustion air, and methods for postcombustion control of NO/sub X/ formation. Recommendations are made to conduct additional research and development needed to allow the installation of new, and retrofit of, advanced energy-conserving, low-NO/sub X/ burners. (ERA citation 11:054786)