Study On The Flue Gas Desulfurization With Polyethyleneimine Solution

With the rapid development of china’s industrial economy has become increasingly serious air pollution, particularly SO2pollution, and can not be neglected problem. Therefore, the research and development of efficient flue gas desulfurization technology to our air pollution is of great significance. Polyethyleneimine polymer organic amine as a solvent, which itself contains a number of different types of different basic strength of the amine; experimental results obtained in conjunction with the paper’s analysis of SO2PEI has a strong ability to absorb desorption. Since there is no relevant research in PEI solution FGD applications. Therefore, the subject of the application results in PEI solution flue gas desulfurization of research started.This topic through simulated sulfur fumes to polyethyleneimine solution as desulfurization absorber, first experiments in simulated flue gas desulfurization tower packing, inspection polyethyleneimine concentration, liquid-gas ratio, the concentration of SO2in the flue gas imports absorption temperature on polyethyleneimine desulfurization system desulfurization rate. In the desorption regeneration, study desorption temperature, desorption time, polyethyleneimine concentration and surfactants on the desorption rate of the system. In recycling, the study desorption lean solution pH, the number of cycles of the system desulfurization rate. On the basis of absorption packed tower above, and carried out in gravity rotating packed bed in simulated flue gas desulfurization experiments to study the rotor speed, liquid-gas ratio, polyethyleneimine concentration, the concentration of SO2in the flue gas imports, the absorption temperature of polyethylene imide by gas desulfurization system desulfurization rate and overall mass transfer coefficient KGa effects deduced overall mass transfer coefficient KGa expressions gravity rotating packed bed gas phase.The experimental results obtained integrated absorption and desorption, optimum conditions polyethyleneimine packed tower for flue gas desulfurization system:absorbing liquid polyethyleneimine initial concentration of5%, liquid-gas ratio3.6L/m3, absorption temperature50～60℃, desorption temperature100～103℃; gravity rotating packed bed system FGD polyethyleneimine optimum conditions are:rotor speed1200～1400rpm/min, liquid-gas ratio2.7L/m3, polyethylene Asia amine concentration of4%to5%, the absorption temperature of55℃Investigate rotating packed bed KGa influence of various factors on the results of:KGa As the rotor speed increases liquid-gas ratio increases, after reaching a certain value increase leveled off, little change. When the PEI concentration, the higher the reaction temperature, the result of the greater KGa. Changes in simulated flue gas SO2concentration of imports had little effect on KGa.