Numerical Simulation Research on Coal Combustion in Rotary Kiln with Multi-Air Channel Coal Burner
This paper presents a 3-dimentional numerical study with CFX software on physical field in rotary kiln with multi-air channel coal burner. The effects of some parameters on flame feature and temperature profile were conducted, which provides reference for optimal operation and design of the multi-air coal burner. A thermal measurement was conducted on an industrial rotary kiln with a length of 90 meters and an inner diameter of 4.5 meters with four-air channel coal burner to obtain the operational conditions and to validate the simulation predictions. The computational result shows that velocity profile near the burner exit is saddle-like. Little central airflow can avoid coal backing up. It was also found that the four-channel coal burner has a good adaptability for the volatiles and size of the coal. Generally, for anthracite coal, average coal size should be limited within 60 micron, and for bituminous coal, an active flame still can be obtained even when the coal size is 86.4 micron.
numerical simulation coal combustion rotary kiln multi-air channel coal burner CFX
Zhou Jiemin Zhu Zaixin Ma Aichun
School of Energy Science and Engineering, Central South University, Changsha, Hunan, 410083, China
国际会议
三亚
英文
1070-1073
2012-01-06（万方平台首次上网日期，不代表论文的发表时间）