Selecting the best piping arrangement for scaling-up an annular channel reactor: An experimental and computational fluid dynamics study 机翻标题: 暂无翻译,请尝试点击翻译按钮。

来源
Science of the Total Environment
年/卷/期
2019 / 667 /
页码
821-832
ISSN号
0048-9697
作者单位
Univ Porto, Fac Engn, Dept Engn Quim, LSRE,LCM, Rua Dr Roberto Frias, P-4200465 Porto, Portugal;Univ Vigo, Dept Chem Engn, BIOSUV Grp, Isaac Newton Bldg,Campus As Lagoas, Vigo 36310, Spain;Univ Porto, Fac Engn, Dept Engn Quim, LSRE,LCM, Rua Dr Roberto Frias, P-4200465 Porto, Portugal;Univ Porto, Fac Engn, Dept Engn Quim, LSRE,LCM, Rua Dr Roberto Frias, P-4200465 Porto, Portugal;Univ Manchester, Sch Chem Engn & Analyt Sci, Sackville St, Manchester M13 9PL, Lancs, England;Univ Porto, Fac Engn, Dept Engn Quim, LSRE,LCM, Rua Dr Roberto Frias, P-4200465 Porto, Portugal;Univ Porto, Fac Engn, Dept Engn Quim, LSRE,LCM, Rua Dr Roberto Frias, P-4200465 Porto, Portugal;Univ Porto, Fac Engn, Dept Engn Quim, LSRE,LCM, Rua Dr Roberto Frias, P-4200465 Porto, Portugal;Univ Vigo, Dept Chem Engn, BIOSUV Grp, Isaac Newton Bldg,Campus As Lagoas, Vigo 36310, Spain;Univ Vigo, Dept Chem Engn, BIOSUV Grp, Isaac Newton Bldg,Campus As Lagoas, Vigo 36310, Spain;Univ Porto, Fac Engn, Dept Engn Quim, LSRE,LCM, Rua Dr Roberto Frias, P-4200465 Porto, Portugal;Univ Porto, Fac Engn, Dept Engn Quim, LSRE,LCM, Rua Dr Roberto Frias, P-4200465 Porto, Portugal;
作者
Moreira, Francisca C.;Bocos, Elvira;Faria, Ana G. F.;Pereira, Joana B. L.;Fonte, Claudio P.;Santos, Ricardo J.;Lopes, Jose Carlos B.;Dias, Madalena M.;Sanroman, M. A.;Pazos, M.;Boaventura, Rui A. R.;Vilar, Vitor J. P.;
摘要
This study is focused on the selection of the best piping arrangement for a pilot scale annular channel reactor intended for the remediation of waters and wastewaters. Two annular channel reactors composed of a single UV lamp and distinct piping arrangements were considered: (i) a novel reactor with tangential inlet/outlet pipes the FluHelik reactor, and (ii) a conventional Jets reactor. These two reactors were manufactured at lab scale and characterized in terms of residence time distribution (RTD), radiant power and ability to degrade aqueous solutions spiked with a model compound - 3-amino-5-methylisoxazole (AMI) - by H2O2/UVC and UVC processes. Computational fluid dynamics (CFD) simulations were used to assess the hydrodynamics, RID and UV radiation intensity distribution of both reactors at pilot scale. In general, experimental results at lab scale revealed quite similar RTDs, radiant powers and AMI degradation rates for both reactors. On the other hand. CFD simulations at pilot scale revealed the generation of a helical motion of fluid around the UVC lamp in the FluHelik reactor, inducing: (i) a longer contact time between fluid particles and UV light, (ii) more intense dynamics of macromixing as a result of larger velocity gradients, turbulent intensities and dispersion of RID values around the peak, and (iii) a more homogeneous UV radiation distribution. In addition, the design of the FluHelik reactor can favor the implementation of various reactors in series, promoting its application at industrial scale. The FluHelik reactor was chosen for scaling-up. A pre-pilot scale treatment unit containing this reactor was constructed and its feasibility was proven. (C) 2019 Elsevier B.V. All rights reserved.
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关键词/主题词
Scaling-up;Reactor design;Annular channel reactor;Process intensification;Water treatment;Computational fluid dynamics;
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