化工进展2017，Vol.36Issue(9)：3177-3188,12.DOI:10.16085/j.issn.1000-6613.2017-0175
新型循环流化床反应器研究进展
Progress in the study of novel circulating fluidized bed reactors
苏鲁书 1朱晴晴 1刘丙超 1李春义1
作者信息
- 1. 中国石油大学(华东)重质油国家重点实验室,山东青岛 266580
- 折叠
摘要
Abstract
The development of novel circulating fluidized bed(CFB)reactors has always been the hot issue in the field of fluidization. This paper first began with a brief introduction of basic principles of circulating fluidization and gas-solids hydrodynamics in CFB reactors,and then the recent advances on the study of novel CFB reactors were reviewed in terms of geometric structure,operation conditions, flow behavior and application prospect etc. Existing novel CFB reactors were also classified. Based on achieving the increase of solids concentration of risers,high density circulating fluidized bed(HDCFB) reactors and circulating turbulent fluidized bed(CTFB)reactors greatly improve the evidently non-uniform spatial and temporal flow structure. However,there are some disadvantages for each reactor,with a large radial gradient of solids holdup in HDCFBs and intensive axial solids backmixing as well as long particles residence time in CTFBs. Moreover,the overall low solids concentration of both reactors further restrict their application in low carbon olefin production process. Coupling effective transportation characteristics of risers with the advantages of high solid concentration as well as efficient heat and mass transfer in dense beds,novel CFB reactors like diameter-changing riser reactors,internal-loop fluidized bed reactors,and multi-regime circulating fluidized bed reactors can achieve high density transportation and develop a uniform flow structure,eliminating effects of reaction environment on final product distribution. Finally,the review proposed that the research on novel CFB reactors should put emphasis on improving gas-solids flow structure,developing optimized integration technologies and establishing unified flow model.关键词
循环流化床/反应器/流体动力学/流动Key words
circulating fluidized bed/reactors/hydrodynamics/flow分类
化学化工引用本文复制引用
苏鲁书,朱晴晴,刘丙超,李春义..新型循环流化床反应器研究进展[J].化工进展,2017,36(9):3177-3188,12.
