いつ流部のない多孔板塔の安定操作範囲と気液滞留量

DOI Web Site Web Site 被引用文献1件

書誌事項

タイトル別名
  • Stable Operating Range and Hold-up in a Perforated Plate Column without Downcomer
  • イツリュウブ ノ ナイ タコウバントウ ノ アンテイ ソウサ ハンイ ト キエ

この論文をさがす

抄録

The lower and upper critical gas velocities determining the stable operating range and the liquid and gas hold-ups were measured in two columns, 50 and 150 mm in diameter, having relatively large hole diameters (7 to 13 mm) and free areas (0.2 to 0.61).<BR>With increasing gas velocity, the three typical gas-liquid flow patterns appeared on the plate, i.e., spray, cellular foam and froth. Cellular foam approximated the flow regime for stable operation.<BR>Column diameter, liquid viscosity and suspension of fine solid particles exerted almost no influence on either the critical velocities or hold-ups. With an increase in surface tension the former increased, whereas its effect on the latter was negligible.<BR>By assuming an interaction between gas and liquid streams through holes, critical velocities based on the free area were correlated in a simple dimensionless expression. The correlation presented reproduces well the literature data covering a wide range of variables for sieve trays as well as turbo-grid trays.<BR>The dimensionless clear liquid height based on the hole gas velocity was represented as a simple function of the ratio of liquid to gas mass flow rates. The gas to liquid hold-up ratio was also rearranged.

収録刊行物

被引用文献 (1)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ