کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
155022 456877 2014 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Bed stability and maximum solids capacity in a Gas–Solid Vortex Reactor: Experimental study
ترجمه فارسی عنوان
پایداری تخت و حداکثر ظرفیت جامدات در یک راکتور جامد گاسا: مطالعه تجربی
کلمات کلیدی
راکتور گرداب گاز-جامد، شستشو، هیدرودینامیک، ثبات، حداکثر ظرفیت جامدات، جریان چند مرحلهای
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی


• Fluidized bed stability and maximum solids capacity in a Vortex Reactor is studied.
• Lower solidsdensity/diameter enhances stability and decreases max. solids capacity.
• Maximum solids capacity becomes almost constant for stable beds.
• Bed instabilities can be overcome by increasing gas injection velocity.

A Gas–Solid Vortex Reactor (GSVR), in literature also referred to as Rotating Fluidized Bed in Static Geometry (RFB-SG), is a promising reactor type for Process Intensification (PI) with respect to reactor volume reduction. Although replacing gravitational by centrifugal force has been considered since the seventies, the hydrodynamics of the reactor flow and the bed behavior remain largely unknown. In the present work experiments have been carried out in a cold flow GSVR with diameter of 0.54 m, length of 0.1 m and 36 inlet slots of 2 mm. Gas injection velocities of 55–111 m/s and particles with densities of 950–1800 kg/m3 and diameters of 1–2 mm have been applied. Depending on solids density, particle diameter and gas injection velocity the bed behavior can be considered as stable, semi-stable or unstable. For semi-stable and stable flow regimes the effect of the above process conditions on the maximum solids capacity was investigated. With increasing solids density, the bed stability considerably decreases, while the maximum solids capacity increases. By increasing the gas injection velocity, both the bed stability and the maximum solids capacity increase. Once bed stability is accomplished, a further increase of the gas injection velocity does not affect the maximum solids capacity. With increasing particle diameter, the bed stability decreases while the maximum solids capacity increases.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Science - Volume 106, 17 March 2014, Pages 293–303
نویسندگان
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