کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
622112 882601 2011 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Understanding maldistribution in 3-pass trays
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
Understanding maldistribution in 3-pass trays
چکیده انگلیسی

Understanding 3 pass trays is the key to design of 6 pass trays, such as those in the large towers expected in carbon-capture services. This paper presents a hydraulic distribution model for 3 pass trays with no liquid or vapor equalization. The model is verified by comparison with FRI's test data and with one operating tower. Our paper predicts good distribution for the 3 pass trays tested at FRI, and shows that the poor efficiencies in some of the tests were due to losing the downcomer seals and not tray maldistribution. The model predicts good distribution at maximum rates in the operating tower, but finds that at lower rates, where valves open and close, there is an extreme sensitivity of vapor distribution to small pressure drop variations. This sensitivity precludes reliable modeling of distribution in this region and may define an unstable region in the operation of 3 pass trays.

Research highlights
► We present a hydraulic distribution model for 3-pass trays with no equalization.
► Predictions compared well to FRI test data for iC4–nC4 and to one operating tower.
► Poor efficiencies in FRI's tests for C6–C7 were due to loss of the downcomer seals.
► Distribution calculation for max rates in an operating valve tray tower was robust.
► At lower rates, vapor distribution is sensitive to small pressure drop variations.
► 3-pass trays modelling is key to 6-pass trays for large towers for carbon-capture.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Research and Design - Volume 89, Issue 8, August 2011, Pages 1397–1404
نویسندگان
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