Abstract

Investigation On The Minimum Fluidization Velocity Of Mixture Containing Biomass Materials And Sands

Author(s): Hong Jiang, Qingxiang Guo, Qingshi Zhu

Biomass materials were difficult to be fluidized alone because of their irregular shapes and large space ratio. In this work, minimum fluidization velocities (vmf) were determined by experiments for different proportions of mixtures containing sands and biomass materials, such as rice husk, sawdust and cornstalk. A novel method for the determination of vmf was proposed. The method was simpler and more fitted to the 2- components system containing biomass materials and sands than Ergun equation. It is important that the method can be used to determine the vmf of heat fluidized bed gasifier. The results of experiments showed that the mixture with lower concentration of biomass materials was more easily to be fluidized than higher ones. The optimum concentration of rice husk, sawdust and cornstalk in mixture were 5%, 10% and 10%, respectively. The mixture was not able to be fluidized when the concentration of biomass materials exceeded 15%.