Analysis of Coal Combustion and Particle Temperature Profiles in a Rotary Kiln for Production of Light-weight Aggregate
경량골재 로타리킬른의 운전최적화를 위한 석탄연소 및 원료입자 승온특성 해석

Jong-Keun Park, Changkook Ryu, Young-Ju Kim
2014 Journal of the Korean Society of Combustion  
Bottom ash from a coal-fired power plant is usually landfilled to a nearby site, which causes a growing environmental concern and increased operating costs. One way of recycling the bottom ash is to produce lightweight aggregate (LWA) using a rotary kiln. This study investigated the temperature profiles of raw LWA particles in a rotary kiln to identify the range of operating conditions appropriate for ideal bloating. For this purpose, a new simulation method was developed to integrate a
more » ... ional model for the bed of LWA particles and the computational fluid dynamics (CFD) for the fuel combustion and gas flow. The temperature of LWA particles was found very sensitive to the changes in the air preheating temperature and excess air ratio. Therefore, an accurate control of the operation parameters was essential to achieve the bloating of LWA particles without excessive sintering or melting.
doi:10.15231/jksc.2014.19.3.018 fatcat:rpsq7fzr3zdgdnqaipxzhdrham