NOVEL WALL DESIGN FOR CIRCULATING FLUIDISED BED REACTORS

摘要：

　　Circulating fluidised beds (CFB) are widely used in industry, e.g.power plants, cracking and solid fuel combustion, due to its excellent mixing and heat transfer properties.The most common problem of CFB reactors is the near-wall clustering effect which hinders the exposure of oxygen to the fuel.Furthermore, clusters presence increases the pressure drop in the reactor which causes significant instability problems.This work proposes a novel wall design that will help to prevent prolonged particle segregation at the walls by reintroducing particles to the free flow stream in the core of the reactor.An Eulerian Two-Fluid model (TFM) is used alongside the kinetic theory of granular flow and the Energy minimisation multiscale drag model (EMMS) is applied for prediction the inhomogeneity of the system.The simulations are performed in ANSYS Fluent 14.0 with additional boundary conditions were developed in C to reintroduce entrained particles rather than simulate the full feedback system.Validation is performed against published data Ibsen 2001 and initial in house experimental investigations.

作者: Recep Kahraman John Shrimpton Kai Luo Sai Gu Lindsay-Marie Armstrong

作者单位: Energy Technology Research Group,School of Engineering Sciences,University of Southampton,Southampto Department of Mechanical Engineering,University College London,London,Torrington Place,WC1E 7JE,Unit School of Engineering,Cranfield University,Cranfield,Bedfordshire,MK43 0AL,United Kingdom

会议类型: 国际会议

会议名称: The 11th International Conference on Fluidized Bed Technology(CFB-11)(第十一届流化床技术国际会议)

会议地点: 北京

会议语种:英文

页码: 529-534

在线出版日期: 2014-05-14（万方平台首次上网日期，不代表论文的发表时间）