华南理工大学学报(自然科学版) ›› 2009, Vol. 37 ›› Issue (7): 123-126,131.

• 动力与电气工程 • 上一篇    下一篇

风速条件下回转窑内物料传输的实验研究

楼波1  罗玉和2  马晓茜1   

  1. 1. 华南理工大学 电力学院, 广东省 绿色能源技术重点实验室, 广东 广州 510640; 2. 仲恺农业技术学院, 广东 广州 510225
  • 收稿日期:2008-04-08 修回日期:2008-07-10 出版日期:2009-07-25 发布日期:2009-07-25
  • 通信作者: 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
  • 作者简介:楼波(1965-),男,副教授,博士,主要从事燃烧技术与环境保护研究.
  • 基金资助:

    广东省科技开发项目(20088080701004)

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)

摘要: 回转窑内的物料平均停留时间(MRT)直接决定物料化学反应程度.文中采用回转窑实验台,在不同的固体废弃物料和窑内风速、回转窑转速、回转窑倾角及物性参数下进行实验,获得了物料MRT的变化规律:随着回转窑转速的提高、倾角的增大和窑内风速的增加,MRT减小;物料的物性参数中,休止角对MRT影响较大,休止角大的MRT小,而密度的影响相对较小;随风速增加,刚开始时MRT下降较快,而后风速的影响减弱,最后趋于稳定.文中还建立了风速条件下的物料传输模型,并在一定风速条件下对模型进行了验证,发现与实验数据相比其平均相对误差为7.69%.

关键词: 回转窑, 传输模型, 平均停留时间, 风速

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