当前位置: X-MOL 学术Chem. Eng. Sci. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Solids flow patterns in large-scale Circulating Fluidised Bed boilers: Experimental evaluation under fluid-dynamically down-scaled conditions
Chemical Engineering Science ( IF 4.7 ) Pub Date : 2021-02-01 , DOI: 10.1016/j.ces.2020.116309
Tove Djerf , David Pallarès , Filip Johnsson

Abstract This work aims at gaining novel knowledge of the mechanisms governing the solids flow pattern in the furnace of large-scale Circulating Fluidised Bed (CFB) boilers. A fluid-dynamically down-scaled unit resembling an existing 200-MWth CFB boiler was built and validated against full-scale data. The extensive experimental campaign showed, among others, that the presence or absence of a dense bed governs the entrainment of solids from the bottom region of the furnace, and that the back-flow of solids at the exit region is negligible at low gas velocities although it quickly becomes significant with an increase in gas velocity. Thus, it is shown that the estimation of the external solids flux by the top flux in the furnace is not generally valid.

中文翻译:

大型循环流化床锅炉中的固体流动模式:流体动力学缩小条件下的实验评估

摘要 这项工作旨在获得有关控制大型循环流化床 (CFB) 锅炉炉膛中固体流动模式的机制的新知识。建造了一个类似于现有 200 MWth CFB 锅炉的流体动力缩小装置,并根据全尺寸数据进行了验证。广泛的实验活动表明,除其他外,密床的存在与否控制着来自炉底区域的固体夹带,并且出口区域的固体回流在低气体速度下可以忽略不计,尽管随着气体速度的增加,它很快变得显着。因此,表明通过炉内顶部通量估计外部固体通量通常是无效的。
更新日期:2021-02-01
down
wechat
bug