کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
238778 465773 2008 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Experimental study of the effect of internals on optimizing gas–solid flow in a circulating fluidized bed
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Experimental study of the effect of internals on optimizing gas–solid flow in a circulating fluidized bed
چکیده انگلیسی

The solids concentration in a circulating fluidized bed of flue gas desulfurization (CFB-FGD) is low, and the gas–solid mixing needs to be strengthened to improve the reaction efficiency. The addition of internals in a square CFB-FGD is studied here. Different sizes of wedge-shaped internals were set in the middle of the riser on opposite sides of the bed, at same height or at different heights. By comparing the concentration distributions, we found that positioning the internals at different heights is more effective in increasing the density of the center region. By observing the radial distribution of the fractal dimension, we found that a strong degree of turbulence can improve the gas–solid mixing. A larger upper/smaller lower arrangement of the internals with a moderate apparent gas velocity provided the best flow field, with increased concentration gradients and improved gas–solid mixing.

We report the wedge-type internals' effect on the flow field in a square-riser circulating fluidized bed. The internals are set on opposite walls at the same or different heights. Optimized flow field is achieved with a larger upper/smaller lower arrangement of the internals with a moderate apparent gas velocity, the best flow field is of increased concentration gradients and improved gas–solid mixing.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Powder Technology - Volume 184, Issue 3, 2 June 2008, Pages 267–274
نویسندگان
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