Biomass Conversion to Solid Fuels Using the Rotary Kiln Process
A mathematical model for the design and optimisation is developed for the biomass pyrolysis process in a rotary kiln. This model includes the transport phenomena of mass and energy transport in the moving bed, the freeboard as well as the peripheral equipment, e.g. the electrical heating, the bearings, and the steel tube. The balance equations are solved for the moving bed using a finite difference scheme, and for the freeboard using the commercial finite volume programme PhoenicsTM. The different flow patterns of the moving bed as well as the solids mixing are considered in the model for varying the process parameters in a wide range. Especially a discontinuous slipping motion of the granular bed is considered by a new model approach. Therefore, the prediction of the residence time is significantly improved by this model. Additionally the turnover of bed motion can be predicted by the model. The chemical degradation reactions are considered by a formal reaction scheme. The model results match all measurements quite well.
Wolfgang Klose Arndt-Peter Schinkel
Institute of Thermal Engineering, University of Kassel, Kassel
国际会议
北京
英文
54-63
2003-10-08（万方平台首次上网日期，不代表论文的发表时间）