Liquid drainage in inclined packed beds-Accelerating liquid draining time via column tilt

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung

Beitragende

  • G. P. Assima - , Université Laval (Autor:in)
  • A. Hamitouche - , Center for Scientific and Technical Research in Physical-Chemical Analysis (Autor:in)
  • M. Schubert - , Professur für Chemische Verfahrenstechnik, Helmholtz-Zentrum Dresden-Rossendorf (Autor:in)
  • F. Larachi - , Université Laval (Autor:in)

Abstract

The dynamics of liquid drainage in inclined packed beds was studied experimentally using electrical capacitance tomography. The evolution of textural flow regimes and liquid saturation profiles were monitored as a function of bed tilt angle and bed height. Film and droplet textural regimes were discriminated during bed drainage tests. They consisted of a rapid step discharging, virtually at constant flow rate, ca. 80% of the poral dynamic liquid followed by as lower step of partially-saturated pores discharging the remaining 20%. The drainage time was markedly reduced upon tilting the column resulting ultimately in virtually bed-length independent drainage times. Bed inclination reduced the droplet paths to the vessel wall, stimulating migration and coalescence of liquid droplets towards the lower mostarea of the column cross-section. This ensured sufficient hydraulic pressure nearby the high-porosity wall area to maintain enhanced liquid outflows. As a prospective process intensification artifice, inclining packed beds way exhibit superior advantage in stimulating drainage of tall vessels especially if emergency circumstances arise.

Details

OriginalspracheEnglisch
Seiten (von - bis)249-255
Seitenumfang7
FachzeitschriftChemical Engineering and Processing: Process Intensification
Jahrgang95
PublikationsstatusVeröffentlicht - 1 Sept. 2015
Peer-Review-StatusJa

Schlagworte

Schlagwörter

  • Electrical capacitance tomography, Film and droplet texture, Liquid drainage, Liquid saturation, Static inclined packed bed