Solid Recycle Characteristics of Loop-seals in a Circulating

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Solid recycle characteristics through a conventional and a newly developed loop-seal (0.08 m i.d.) system are determined in a circulating fluidized bed of FCC or silica sand particles. In the loop-seal developed here, gas was injected downward tangentially to the wall of the loop-seal to increase solids mass flux with stable flow. For conventional loop-seal, solids mass fluxes increase linearly with increasing aeration rate but it reaches a maximum value.At the same aeration rate with different aeration locations (0.1 - 0.6 m) in a conventional loop-seal, a maximum solids mass flux is seen at a height to diameter ratio of 2.5. For the newly developed loop-seal, mass fluxes ofFCCand sand particles are higher and more stable than in conventional loop-seal at the same aeration rate. The solid mass fluxes obtained have been correlated with the aeration rate and Archimedes number.
Publisher
John Wiley & Sons
Issue Date
2001
Keywords

loop-seal; circulating fluidized bed

Citation

Chem. Eng. Technol. 24(8), 843-849

ISSN
0930-7516
DOI
10.1002/1521-4125(200108)24:8<843::AID-CEAT843>3.0.CO;2-D
URI
http://hdl.handle.net/10203/4297
Appears in Collection
CBE-Journal Papers(저널논문)

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