JAPANESE JOURNAL OF MULTIPHASE FLOW
Online ISSN : 1881-5790
Print ISSN : 0914-2843
ISSN-L : 0914-2843
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Volume 2, Issue 4
Displaying 1-6 of 6 articles from this issue
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  • Fundamentals of Gas Fluidization Technology
    Shigeharu MOROOKA, Katsuki KUSAKABE
    1988 Volume 2 Issue 4 Pages 256-269
    Published: December 15, 1988
    Released on J-STAGE: February 22, 2011
    DOIhttps://doi.org/10.3811/jjmf.2.256
    JOURNAL FREE ACCESS
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    The fluidization technology for gas-solid systems was overviewed. The stress was put on behavior of gas bubbles, properties of emulsion phase, description of powder groups, axial mixing of solids, and modeling of fluidized-bed contactors. The fluidization of ultrafine particles was also mentioned.
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  • Feasibility of High Velocity Circulating Fluidized-Bed Technology
    Shigekatsu MORI
    1988 Volume 2 Issue 4 Pages 270-280
    Published: December 15, 1988
    Released on J-STAGE: February 22, 2011
    DOIhttps://doi.org/10.3811/jjmf.2.270
    JOURNAL FREE ACCESS
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    To discuss the feasibility of the high velocity fluidized-bed (CFB) technology, brief reviews on the history of the development of CFB and on its fluidization behaviors are presented. It is also discussed the reasons why the circulating fluidized-bed boilers (CFBC) are appeared before the footlight recently. CFB is pronounced technology for the new boiler systems and also it has sufficient possibility to be applied on the new solid-gas contact systems. To support these technology, much more fundamental research works on the solid-gas multiphase system including CFB are required.
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  • Coal Combustion Mechanism and Behavior of NOx in Fluidized Bed
    Kazutomo OHTAKE
    1988 Volume 2 Issue 4 Pages 281-291
    Published: December 15, 1988
    Released on J-STAGE: February 22, 2011
    DOIhttps://doi.org/10.3811/jjmf.2.281
    JOURNAL FREE ACCESS
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    After introducing the system of coal fueled bubbling type dense fluidized bed, the relationship between coal combustion process and the characteristic phenomena occurring in the fluidized bed was described and NOx formation mechanisms during these processes were discussed. NOx reduction reactions occurring on the surfaces of fluidizing materials and burning char with the chemical compounds such as amines, cyanides formed from fuel-N and of CO, H2 were described.
    Finally, the combustion methods for the NOx in-furnace reduction were discussed.
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  • Multi Solid Fluidized Bed Boilers and Multiphase Flow Problems
    Yasuo KOJIMA, Tatsuo MII
    1988 Volume 2 Issue 4 Pages 292-298
    Published: December 15, 1988
    Released on J-STAGE: February 22, 2011
    DOIhttps://doi.org/10.3811/jjmf.2.292
    JOURNAL FREE ACCESS
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    The first commercial Multi-Solid Fluidized Bed (MSFB) Boiler in Japan was constructed by Mitsui Engineering and Shipbuilding Co., Ltd. and has been operated as a captive power plant for Kuraray Co., Ltd., a chemical textiles manufacturer.
    This paper describes the concept and features of MSFB, the operation data and the technical points which were established to have stable and reliable operating conditions in dense bed and solid circulating system, introducing a few examples of various and complicated behaviours in multiphase flow of MSFB system.
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  • Coal Feed System for Atmospheric Fluidized Bed Combustion Boiler
    Kenji HIGASHIKAWA, Shujiro KOGA, Youichi KUBOTA, Michitaro KAN, Nobuyo ...
    1988 Volume 2 Issue 4 Pages 299-306
    Published: December 15, 1988
    Released on J-STAGE: February 22, 2011
    DOIhttps://doi.org/10.3811/jjmf.2.299
    JOURNAL FREE ACCESS
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    Atmospheric fluidized bed combustion (AFBC) boiler is one of the important break-through in the area of coal combustion technology, Recently a number of demonstration plants of AFBC boiler have been constcted by utility companies in the world.
    The coal feed system of AFBC boilers plays an important role for successful operation of AFBC boilers. Employing the unerbed feed system, we have developed a feed system for AFBC boilers and carried out experimental study using a pilot plant. The developed feed system achieved stable transportation of dense coal-air mixture and uniform distribution with the multi-outlet distributor.
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  • Present Status and Development of Fluidized Bed Combustion Technologies
    Yasuyuki NAKABAYASHI
    1988 Volume 2 Issue 4 Pages 307-328
    Published: December 15, 1988
    Released on J-STAGE: February 22, 2011
    DOIhttps://doi.org/10.3811/jjmf.2.307
    JOURNAL FREE ACCESS
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    Fluidized bed combustion (FBC) boilers are capable of burning high moisture, low calorie and other low quality coals. And FBC also makes it possible to employ the in-furnace desulfurization that simplifies the conventional desulfurizing systems with saving of construction costs. Because of its merits, the development of the FBC technologies has has been actively carried out in many countries.
    This paper describes the current status and the development of FBC technologies.
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