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Solids backmixing a...
Solids backmixing and entrainment in the splash zone of large-scale fluidized bed boilers
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- Djerf, Tove, 1989 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Pallarès, David, 1975 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Johnsson, Filip, 1960 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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(creator_code:org_t)
- Elsevier BV, 2022
- 2022
- Engelska.
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Ingår i: Powder Technology. - : Elsevier BV. - 1873-328X .- 0032-5910. ; 404
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- This work studies the fluid dynamics of the solids in the splash zone of fluidized bed furnaces, with focus set on solids back-mixing and solids entrainment in order to enhance the understanding and prediction of the solids flow in the bottom region of the furnace. Experimental results show the establishment of a splash zone also for runs in absence of a dense bottom bed. A simple model assuming ballistic trajectories of the ejected solids is shown to satisfactorily estimate the solids back-mixing rate. The flux of non-backmixed solids, which are entrained from the bottom region, is found to be unaffected by the bottom wall configuration (tapered/vertical) for a given gas flow. Finally, an empirical expression is proposed for the solids entrainment from the bottom region which covers wide operational and unit size ranges.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Energiteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Energy Engineering (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Naturresursteknik -- Havs- och vattendragsteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Environmental Engineering -- Ocean and River Engineering (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Strömningsmekanik och akustik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Fluid Mechanics and Acoustics (hsv//eng)
Nyckelord
- Solids flow
- Solids entrainment
- Splash zone
- Fluidized bed
- Solids back-mixing
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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