Numerical simulation of oxy-coal MILD combustion with high-velocity oxygen jets

详细信息    查看全文

• 作者：Ruochen Liu ; Enke An ; ^{axa@tongji.edu.cn} ; Kun Wu ; Zeqing Liu
• 关键词：Oxy-coal combustion ; MILD combustion ; High-velocity oxygen jet ; Inner recirculation rate ; Mixing and preheating zone
• 刊名：Journal of the Energy Institute
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：90
• 期：1
• 页码：30-43
• 全文大小：2415 K
• 卷排序：90

文摘

In this work, oxy-coal combustion and MILD combustion are combined based on high-velocity oxygen entrainment technology, which is a new concept for combustion. It differs from air-firing due to high concentration of CO2 as well as oxy-coal combustion due to its distributed combustion mode. The flow characteristics, combustion temperature, ignition characteristics, emissions under different jet design and jet spacing were compared in a lab-scale cylindrical furnace. So far, MILD combustion state is judged qualitatively, while a mathematical method corresponding to internally mixing and preheating zone was introduced here to judge MILD combustion state through numerical simulation. It based on the MILD combustion definition. These numerical simulation work lays foundation for the further experiments, having referencing value to a large degree.