Effect of draft tube position on the hydrodynamics of a draft tube slurry bubble column

F. F. Pironti, V. R. Medina, R. Calvo, A. E. Sáez

Research output: Contribution to journalArticle

24 Scopus citations

Abstract

Two- and three-phase hydrodynamic studies were conducted in an air lift bubble column with an internal loop. The bubble column had a conical distributor at the bottom, through which the gas was sparged, creating a liquid or slurry circulation from the draft tube to be annular region. The axial position of the draft tube was varied with respect to the conical section. The experiments were performed with the air-water system at ambient conditions, using siliceous sand as the solid phase. When the bottom of the draft tube was located precisely at the transition between the conical and cylindrical regions, no liquid circulation was observed. When the draft tube was located in a lower position, liquid circulation started and its magnitude increased as the draft tube was further lowered inside the conical region. The results presented indicate that the hydrodynammic behaviour of these systems can be effectively controlled by varying the axial position of the draft tube.

Original languageEnglish (US)
Pages (from-to)155-160
Number of pages6
JournalThe Chemical Engineering Journal and The Biochemical Engineering Journal
Volume60
Issue number1-3
DOIs
StatePublished - Dec 1995
Externally publishedYes

Keywords

  • Air/lift reactor
  • Draft tube
  • Slurry bubble column

ASJC Scopus subject areas

  • Biochemistry

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