کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
640660 1456978 2015 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of ring shape attached on upper outlet pipe on fine particle classification of gas-cyclone
ترجمه فارسی عنوان
اثر شکل حلقه متصل به لوله خروجی بالا بر طبقه بندی ذرات ضخیم از گاز سیکلون
کلمات کلیدی
گاز سیکلون، جداسازی ذرات، اندازه برش، اندازه ذرات، ذرات زیر میکرون
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
چکیده انگلیسی


• Fluid recirculation region is found at upper outlet pipe of gas-cyclone.
• By use of tapered ring, fluid recirculation region is almost deleted.
• High collection efficiency and low pressure drop is achieved by use of the ring.
• CFD has been used to predict the cyclone performance.

The effect on particle collection efficiency of a ring attached to the upper part of the outlet pipe of a gas cyclone was examined by experiment and CFD simulation. From a visualization experiment using fine bubble foam and CFD simulation, the rotational recirculation region is at maximum near the upper plate and the region decreases to the lower position. For the tapered shape ring of type Dc, the cyclone pressure drop is minimum, because the rotational recirculation region is almost eliminated by use of this special ring. The 50% cut size of the tapered shape ring of type Dc shows a minimum value and maximum particle collection efficiency is obtained. For the tapered shape ring, the optimum wall thickness ratio of the upper part to lower part is 1.47 and maximum particle collection efficiency and minimum pressure drop is simultaneously realized by use of the type Dc ring. The average downward fluid velocity in the upper part of the cyclone for the type Dc ring is greater than that of the case without the ring. Particles tend to go toward the downward direction easily and high particle collection efficiency is achieved for this special ring. The experimental partial separation efficiency qualitatively agreed with the simulation results.

Bubble foam and particle remained on upper outlet pipe after experiment.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Separation and Purification Technology - Volume 141, 12 February 2015, Pages 84–93
نویسندگان
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