A Study on Optimization of Spray Type Flue Gas Desulfurization (FGD) System

모사 탈황흡수탑을 이용한 Spray Type 탈황설비 최적운전 방안에 관한 연구

  • An, Hi-Soo (Korea Electric Power Research Institute) ;
  • Park, Seung-Soo (Korea Electric Power Research Institute) ;
  • Kim, Ki-Hyoung (Korea Electric Power Research Institute) ;
  • Kim, Young-Ho (Department of Fine Chemicals Engineering & Chemistry, Chungnam National University)
  • Received : 2006.08.24
  • Accepted : 2007.01.04
  • Published : 2007.02.10

Abstract

Recently, due to narrow margin on design factor of flue gas desulfurization (FGD) systems or aging of systems, some problems such as decrease of $SO_2$ removal efficiency and difficulty on coping with unstable state are arising on FGD systems. On this study, to cope with these problems several methods such as adjustment of reagent pH, inlet $SO_2$ concentration, variation of units of operation pump, installation of liquid distribution ring (LDR) were attempted to increase the $SO_2$ removal using spray type simulated FGD system. Also, sulfite and Al/Fx ion effects on limestone blinding were experimented. When three absorber recirculation pumps were operated, $SO_2$ removal was increased by 12% in comparison with that of two pumps operation. $SO_2$ removal was increased by 2~7% after installation of LDR. Dissolved oxygen increased up to 0.5 ppm and limestone binding effect was alleviated after injection of dibasic acid (DBA) with the concentration of 500 and 1,000 ppm. When $Al^{3+}$ and $F^-$ ions were coexisting, the dissolution rate of limestone was decreased by 20%.

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