Journal of South China University of Technology (Natural Science Edition) ›› 2009, Vol. 37 ›› Issue (7): 123-126，131.

• Power & Electrical Engineering • Previous Articles     Next Articles

Experimental Investigation into Material Transport Considering Air Velocity in Rotary Kiln

Lou Bo1  Luo Yu-he2  Ma Xiao-qian1   

  1. 1. School of Electric Power, Guangdong Key Laboratory of Clean Energy Technology, South China University of Technology, Guangzhou 510640, Guangdong, China; 2. Zhongkai University of Agriculture and Technology, Guangzhou 510225, Guangdong, China
  • Received:2008-04-08 Revised:2008-07-10 Online:2009-07-25 Published:2009-07-25
  • Contact: 楼波（1965-），男，副教授，博士，主要从事燃烧技术与环境保护研究． E-mail:loubo@scut．edu．cn
  • About author:楼波（1965-），男，副教授，博士，主要从事燃烧技术与环境保护研究．
  • Supported by:

    广东省科技开发项目（20088080701004）

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Abstract:

The mean residence time （MRT） of materials in a rotary kiln directly affects the extent of chemical reaction. In this paper, the variation rules of MRT for different kinds of solid wastes were experimentally investigated at various air velocities in kiln, rotational speeds of kiln, inclination angles of kiln and physical properties of raw materials. The results indicate that MRT decreases with the increase of rotational speed, inclination angle, air velocity and repose angle, that the repose angle of the material greatly affects MRT, which is different from the density, and that, with the increase of air velocity, MRT first greatly decreases then keeps unchanged. A MRT model considering air velocity （MMCAV） is finally established and validated at a certain air velocity, with an average relative error of 7.69% between MMCAV and experimental data being obtained.

Key words: rotary kiln, transport model, mean residence time, air velocity