CAJ | 학술논문

采用光纤测量与数据处理方法,在不同操作条件下,对一套大型组合流化床燃烧器环流段内固体颗粒的局部返混及截面返混特性进行了测定.结果表明,以颗粒局部返混比R_(mix,L)表征的局部返混特性规律为在环隙区的径向分布较均匀、而在其他区域(导流筒区、底部区和颗粒分流区)呈中心区小边壁区大的不均匀分布形态.在环流反应器的整个流动区域内,R_(mix,L)变化范围为0～0.9,颗粒截面返混比R_(mix,T)变化范围为0.1～0.6.
채용광섬측량여수거처리방법,재불동조작조건하,대일투대형조합류화상연소기배류단내고체과립적국부반혼급절면반혼특성진행료측정.결과표명,이과립국부반혼비R_(mix,L)표정적국부반혼특성규률위재배극구적경향분포교균균、이재기타구역(도류통구、저부구화과립분류구)정중심구소변벽구대적불균균분포형태.재배류반응기적정개류동구역내,R_(mix,L)변화범위위0～0.9,과립절면반혼비R_(mix,T)변화범위위0.1～0.6.
Under different operation conditions, by optical fiber measurement with suitable data processing, the local and cross-sectional particle back-mixing characteristics in the riser and annular sections of a large-scale compound fluidized bed combustor were investigated. The experimental results show that the radial distribution profiles of particle local back-mixing ratio (R_(mix,L)) is uniform in the annulus, but non-uniform in other three regions (draft tube, bottom and particle separation regions) of the loop reactor. The value of R_(mix,L) in the loop reactor varies from 0 to 0.9. And the value of the particle cross-sectional back-mixing ratio ranges from 0.1 to 0.6 in the whole region of the reactor.