Axial solid fraction profiles in the riser system of a novel circulating fluidized bed design
A novel CFB design for flash pyrolysis of biomass has been developed and successfully been operated at bench-scale. Its special feature is the riser system consisting of a bubbling fluidized bed in the bottom and a high velocity riser above. The former serves as solids reservoir and combustion chamber for the recirculated pyrolysis by-product char, whereas the actual pyrolysis process occurs in the latter. As to the novel characteristics of this CFB system fluid dynamic data derived from corresponding and reliable sources is essential to understand and improve the performance of the system. In this paper, the axial solids hold-up derived from experiments in a scale model, fluid dynamically similar to an industrial-scale CFB pyrolyser, are presented. The influence of fluidization rate, solids loading and geometry of the riser system on axial solids fraction profiles is described.
Bibliographic Reference: Paper presented: 3rd European Conference on Fluidization, Toulouse (FR) 29-31 May 2000
Availability: Available from European Commission, Joint Research Centre, Ispra (IT)
Record Number: 200012265 / Last updated on: 2000-08-10
Original language: en
Available languages: en