FLUIDIZATION CHARACTERISTICS OF STALK-SHAPED BIOMASS IN BINARY PARTICLE SYSTEM
Experimental investigation on fluidization characteristics of biomass alone and sand-biomass mixture has been carried out in a 3D fluidized bed by means of visual observation and pressure fluctuation analysis. The biomass material employed is cotton stalk, and the sands used are of three different sizes. They together make up of three kinds of mixtures, in which the percentage of biomass particle in each mixture (Xw0) are 1.79, 4.36, 8.36, 15.43 and 31.33 by weight. Additionally, the experiment is conducted over a wide range of gas velocity. It is found that regardless of gas velocities, the biomass alone can not archive good fluidization, whereas small additive of sand substantially improves the fluidization quality. The results also show that the fluidization regime is more sensitive to Xw0 as compared with sand particle size. The transition velocity (Uc) from bubbling to turbulent fluidization regime decreases with Xw0 for the same mixture, while increasing the size of sand component leads to a delay transition in different mixture.
biomass particle fluidized bed turbulent pressure fluctuation
Y.Zhang B.S.Jin W.Q.Zhong
School of Energy & Environment, Southeast University, Nanjing, 210096, China
国际会议
第20届国际流化床燃烧会议(20th International Conference on Fluidized Bed Combustion)
西安
英文
311-316
2009-05-18（万方平台首次上网日期，不代表论文的发表时间）