超细颗粒快速循环流化床研究

Cohesive forces among ultra-fine particles always lead to the formation of channeling and particle agglomerating in bubbling fluidized bed, which in turn results in instability of the operation. Therefore, fluidizing ultra-fine particles with a fast circulating fluidized bed that comprises contrived internals is proposed by this project. With the action of internals and high velocity gas flow, large agglomerates in a fluidized bed are expected to be efficiently broken into smaller pieces. In addition, with the assistance of particle collection system comprising cyclone separator, conical fluidized dipleg, V-shaped pneumatic controlled valve, a stable circulation of materials can be reached. The ultimate outcome of this project is to develop a new type of fast circulating fluidization reactor for ultra-fine particles in order to meet the demands of industries.

由于超细颗粒间存在较大粘性力，在鼓泡流化床中常形成沟流与聚团，难以实现平稳流态化。本项目提出采用具有内部构件的快速循环流化床，借助由旋风分离器、料腿、气动排料阀组成的颗粒捕集系统，实现物料的稳定循环操作。从而开发一种新型的超细颗粒快速循环流化床反应器，以满足工程上的急需。