烟气脱硫三相流化床反应器的数学模拟与预测放大

研究了 0 .1m和 1m两种直径烟气脱硫三相流化床反应器冷态试验装置的性能 ,利用计算流体力学模型和数值计算方法模拟了反应器内气含率分布、液体轴向速度、压降、SO₂ 浓度轴向分布与反应器出口的SO₂ 浓度 ,获得了将反应器放大到 1m塔径的计算敏感参数C_w 的关联式 ,预测了反应器直径对塔内气含率分布和压降的影响

SCALE-UP AND MODELING OF COUNTERCURRENT THREE-PHASE FLUIDIZED REACTOR FOR FLUE GAS DESULFURIZATION

Measurements and modeling of the fundamental properties were performed in two cold-state turbulent bed contactors, TBC, with an inner diameter of 0.1 and 1.0 m and height of 3.0 and 9.0 m respectively. A CFD model was used in numerical computation and scale-up of the countercurrent three-phase fluidized bed reactor for flue gas desulfurization. The pressure drop and radial profiles of local gas holdup and axial liquid velocity in the countercurrent three-phase bubble column were measured and calculated by CFD model. Correlation on the interfacial force, C w, was found sensitive to the diameter of reactor. The correlation was improved in the modeling of large diameter reactor. Good agreement between experimental and calculated values were found. Some studies on this model and simulation for predicting further the local flow and reaction characteristics of the countercurrent three-phase TBC scrubber with 5.0 m ID are reported in the paper. A model based on penetration theory, physical chemistry properties and dynamical properties of fluid is developed to calculate the dynamic absorption rate of sulfur dioxide in limestone slurry.