Effects of Geometric Properties for a Perforated Plate on Gas Holdup in a Bubble Column.

• Kawasaki Hiroyuki

  Department of Chemical and Biochemical Engineering, Toyama University

• Tanaka Hisaya

  Department of Chemical and Biochemical Engineering, Toyama University

抄録

The effects of geometric properties such as diameter, d, number, n, and pitch, p, for holes located on a perforated plate on gas holdup, φ, in a bubble column were experimentally investigated while varying gas flow rate, G, and unaerated liquid height, Z₀.<BR>In the case of constant Z₀, the volume of the spouting section above the column bottom increased with increasing d and decreasing n and p, and became negligible compared with that of the calming section at sufficiently large Z₀. As a result, the value of φ based on the volume of the bubble bed Increased and approached that of φ_C based on the volume of the calming section. The value of φ_C was correlated to two parameters as a dimensionless expression. One was the flow parameter defined by a ratio of the reference velocities in the free and recirculated rising regions, and another was the distribution parameter for gas holdup in the recirculated rising region. Since the latter was strongly dependent on geometric properties for a perforated plate, its empirical expression was obtained as a function of the properties.

収録刊行物

• JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

  JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 28 (6), 715-720, 1995

  公益社団法人 化学工学会

キーワード

• Bubble Column
• Gas Holdup
• Perforated Plate
• Distribution Parameter
• Flow Parameter

詳細情報

• CRID: 1390282679543815040
• NII論文ID: 10002134804
• NII書誌ID: AA00709658
• DOI: 10.1252/jcej.28.715
• COI: 1:CAS:528:DyaK28XhvFWruw%3D%3D
• ISSN: 18811299
• ISSN: 00219592
• Web Site: http://www.jstage.jst.go.jp/article/jcej/28/6/28_6_715/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可