Downflow of solids in standpipes

Leung L.S. and Wilson L.A. (1973) Downflow of solids in standpipes. Powder Technology, 7 6: 343-349. doi:10.1016/0032-5910(73)80047-6


Author Leung L.S.
Wilson L.A.
Title Downflow of solids in standpipes
Journal name Powder Technology   Check publisher's open access policy
ISSN 0032-5910
Publication date 1973-01-01
Sub-type Article (original research)
DOI 10.1016/0032-5910(73)80047-6
Open Access Status Not yet assessed
Volume 7
Issue 6
Start page 343
End page 349
Total pages 7
Subject 1500 Chemical Engineering
1606 Political Science
Abstract General two-phase theory is applied to the flow of gas-solid mixtures in standpipes. It is shown that at a fixed flow rate both fluidized bed flow and packed bed flow can coexist in the same standpipe. Matsen's analysis of standpipe flow is extended and a general method for determining flow pattern and gas entrainment rate in standpipe flow is described. Data from a commercial standpipe in a fluid bed catalytic cracking unit are analysed. The analysis shows that fluidized bed flow occurs in the standpipe in support of Matsen's work on standpipe flow in another fluid bed catalytic cracking system. Flow instability, in standpipe is discussed in the light of this work and a mechanism of flow instability based on transition in flow pattern is postulated.
Q-Index Code C1
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import - Archived
 
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Created: Tue, 13 Sep 2016, 14:33:28 EST by System User