Numerical analysis of the energy-saving tray absorber of flue-gas desulfurization systems

Jae Min Hwang, Ssang Suk Choi, Jin Taek Chung

Research output: Contribution to journalArticlepeer-review


This study is performed to study the effect of the tray in the absorber of a flue-gas desulphurization (FGD) system by using a computational fluid dynamic (CFD) technique. Stagnant time of slurry and the pressure drop in the FGD absorber increase when a tray is used in the absorber. Stagnant time of slurry results in an increase in the desulfurization effect and a decrease in the power of the absorber recirculation pump; however, increased pressure drop requires more power of booster fan in the FGD system should be increased. The gas and slurry hydrodynamics inside the absorber is simulated using a commercial CFD code. The continuous gas phase has been modeled in an Eulerian framework, while the discrete liquid phase has been modeled by adopting a Lagrangian approach by tracking a large number of particles through the computational domain. It was observed that the power saved upon increasing the stagnant time of slurry was more than increased power with pressure drop.

Original languageEnglish
Pages (from-to)775-782
Number of pages8
JournalTransactions of the Korean Society of Mechanical Engineers, B
Issue number8
Publication statusPublished - 2010 Aug


  • Absorber
  • CFD
  • FGD system
  • Flue gas
  • Flue gas desulfurization
  • Tray

ASJC Scopus subject areas

  • Mechanical Engineering


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