Design and research on simulation model of limestone-wet flue gas desulfurization absorption tower

摘要

? 2019, The Editorial Board of Journal of System Simulation. All right reserved. ? 2019, The Editorial Board of Journal of System Simulation. All right reserved. The mass transfer and chemical reaction processes of wet flue gas desulfurization (FGD) are very complex. It is helpful to improve the operation level of desulfurization site by studying the internal mechanism and establishing a high precision mechanism model. The absorption tower is divided into some regions, and the modeling targets in different regions are determined. The sulfur dioxide absorption region is divided into different heights of the "cell" by the slurry droplet falling distance and exposure time. According to the motion characteristics and mass transfer process, the desulfurization efficiency and pressure drop are calculated, and the absorption efficiency calculation method and the pressure drop across the region are obtained; the PH value of the slurry zone is described as a function of the concentration of the major components in the slurry; the mist pressure drop according to velocity of flue gas is divided into low and high speeds for two stage calculations. The accuracy of the model is verified by simulation. The mass transfer and chemical reaction processes of wet flue gas desulfurization (FGD) are very complex. It is helpful to improve the operation level of desulfurization site by studying the internal mechanism and establishing a high precision mechanism model. The absorption tower is divided into some regions, and the modeling targets in different regions are determined. The sulfur dioxide absorption region is divided into different heights of the "cell" by the slurry droplet falling distance and exposure time. According to the motion characteristics and mass transfer process, the desulfurization efficiency and pressure drop are calculated, and the absorption efficiency calculation method and the pressure drop across the region are obtained; the PH value of the slurry zone is described as a function of the concentration of the major components in the slurry; the mist pressure drop according to velocity of flue gas is divided into low and high speeds for two stage calculations. The accuracy of the model is verified by simulation.