MEASUREMENT OF SOLIDS VELOCITY AND CONCENTRATION IN A LARGE COLD CFB MODEL
This work applies optical probe and particle image velocimetry (PIV) measurements for determining the local characteristics of the solids flow in a CFB riser and discusses benefits and limitations of the two methods.Measurements were carried out in an 8.5 m tall CFB riser with a cross-section of 0.7 m x 0.12 m.The optical probe was used to measure both solids volume fraction and velocity whereas the PIV was limited to solids velocity measurements.In addition, the vertical pressure profile and solids circulation rate were measured by means of pressure transducers.The work demonstrates the challenge of applying detailed solids flow measurements in CFB reactors.Both methods applied are associated with limitations and inaccuracies and it is concluded that a combination of both local measurement methods and the global pressure measurements will improve the interpretation of the solids flow field in CFB risers.
Juho Peltola Lassi Karvonen Jouni Elfvengren Jari Kolehmainen Sirpa Kallio David Pallarès Filip Johnsson
VTT Technical Research Centre of Finland,P.O.Box 1000,FI-02044 VTT,Finland Tampere University of Technology Chalmers University of Technology
国际会议
The 11th International Conference on Fluidized Bed Technology(CFB-11)(第十一届流化床技术国际会议)
北京
英文
589-594
2014-05-14（万方平台首次上网日期，不代表论文的发表时间）