배연탈황설비 흡수탑 내 연소가스 및 슬러리의거동에 관한 수치해석적 연구 = Numerical Analysis on the Flue Gas Flow and Slurry Behaviorin the Absorber of a Flue Gas Desulphurization (FGD) System

다국어 초록 (Multilingual Abstract)

Numerical analysis had been performed to understand ow characteristics of the ue gas and slurry in the absorberof a flue gas desulphurization (FGD) system using computational fluid dynamics (CFD) technique. Two-fluid(Euler-Lagrangian) model had been employed to simulate physical phenomenon, which slurry particles injectedthrough slurry spray nozzles fall down and bump into the ue gas inowing through inlet duct. It was not necessaryto adopt pre-dened pressure drop inside the absorber because interaction between ue gas and slurry particles wasconsidered. Hundreds of slurry spray nozzles were considered with the spray velocity at the nozzles, swirl velocityand spreading angle. The results note that the ow disturbance of ue gas is found at the bottom of the absorber,and the current rising with high speed stream is observed in the opposite region of the inow duct. The high speedstream is reduced as the ue gas goes up, because the high speed stream of ue gas dumps falling slurry particlesdue to momentum exchange between ue gas and slurry particles. In spite of some disproportion in slurry distribu-tion inside the absorber, escape of slurry particles from the absorber facility is not observed. The pressure dropinside the absorber is mainly occurred at the bottom section.

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