2007 Fiscal Year Final Research Report Summary
Study of Reduced Water Washing by Novel Fluidized System
| Project/Area Number |
18560728
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Properties in chemical engineering process/Transfer operation/Unit operation
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| Research Institution | Kochi National College of Technology |
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Principal Investigator |
NAGAHASHI Yusumi Kochi National College of Technology, Dept. of Mech. Eng., Professor (80208040)
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| Co-Investigator(Kenkyū-buntansha) |
YOKOGAWA Akira Kochi University of Technology, Collab. Research Center, Professor (60299394)
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| Project Period (FY) |
2006 – 2007
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| Keywords | hydrodynamics / chemical engineering / fluidized bed / multiphase flow / powder technology |
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| Research Abstract |
The results of this study is summarized as follows, the bur principal research items as mentioned below were investigated experimentally and valuable results were obtained. (1) The influence of addition of small large-density particles into this novel fluidized bed on bed hydrodynamics and the particle separation and removal system were investigated The small large-density particle simulated as washing waste as mud thr farm products washing. As the result, the optimum operation condition for particle addition was presented and the appropriate configuration of distributor for small-particle separation and removal was proposed. (2) The mechanism for fluidization washing in this novel fluidized system was proposed, ie., the fluidization washing composed of two washing characteristics, one is a hard-impact washing such as mud removal from farm products and another is a soft-abrasive washing such as oil soil removal from industrial works. The mechanism was supported successfully by the next experimental results of (3) and (4). (3) The relationship between particle collision fare and attrition rate of the test tube covered with plaster layer was investigated and the influence of gas velocity, addition of water and addition of small particles were clarified. Comparing with the attrition characteristics in both the novel fluidized bed and the bubbling water flow without any particles, the principal factor for a hard-impact washing was identified the particle collision force. (4) On the other hand, from the result of whitening test of standard soiled cloth covered the test tube, another washing characteristics such as soft-abrasive washing also acts far fluidization washing.
These whole findings give a new scientific understanding about hydrodynamics and washing characteristics of this novel fluidized system and also give an effective design guideline for industrial washing devices as the application of this fluidized system.
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[Journal Article] Flow Characteristics of Fully Wetted Binary Solid Mixtures in Gas Fluidized Beds with Inclined Gas Distributors2007
Author(s)
Y. Nagahashi, J. R. Grace, N. Epstein, Y. Asako, A. Yokogawa
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Journal Title
Fluidization XII, ed. X, Bi, F. Berruti and T. Pugsley, United Engineering Conferences, Brooklyn, NY
Pages: 337-344
Description
「研究成果報告書概要(和文)」より
Peer Reviewed
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[Journal Article] Flow Characteristics of Fully Wetted Binary Solid Mixtures in Gas Fluidized Beds with Inclined Gas Distributors.2007
Author(s)
Y. Nagahashi, J. R. Grace, N. Epstein, Y. Asako, A. Yokogawa
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Journal Title
Fluidization XII, ed. X, Bi, F. Berruti and T. Pugsley, United Eng. Conferences, Brooklyn, NY
Pages: 337-344
Description
「研究成果報告書概要(欧文)」より
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[Presentation] 流動層洗浄の研究-添加微小重粒子の影響-2008
Author(s)
永橋優純, 池田篤彦, J. R. Grace, N. Epstein, 浅古豊, 横川明
Organizer
化学工学会 第14回流動化・粒子プロセッシングシンポジウム, 大阪, No. 1-9.
Place of Presentation
大阪大学
Year and Date
2008-12-11
Description
「研究成果報告書概要(和文)」より
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[Presentation] 特殊流動様式中に置かれた円筒表面の摩耗と粒子衝突力2008
Author(s)
永橋優純, 池田篤彦, J. R. Grace, N. Epstein, 浅古豊, 横川明
Organizer
日本混相流学会年会講演会2008, 会津, A141
Place of Presentation
会津大学(会津若松市)
Year and Date
2008-08-08
Description
「研究成果報告書概要(和文)」より
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[Presentation] 特殊三相流動層における粒子衝突力と洗浄特性2007
Author(s)
永橋優純, 高岡慎二, J. R. Grace, N. Epstein, 浅古豊, 横川明
Organizer
日本混相流学会年会講演会2007, 札幌, C 224
Place of Presentation
札幌コンベンションセンター
Year and Date
2007-06-23
Description
「研究成果報告書概要(和文)」より
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