Theoretical And Experimental Investigation On FGD By Jet Generating Charged Droplet In The Electrostatic Field

Flue gas containing SO2 emitted from the process of the industry production can result in huge damage to human. It's an emergency to resolve the problem of SO2 pollution. The traditional desulfurization technology has some disadvantages, for example, high investment and poor utilization. Due to these problems, desulfurizing technology with charged spray is proposed.Charged spray technology and desulfurization mechanism is discussed in this paper. The research shows that high electric charged droplets can be obtained from faradic gas-fluid two-phase jet. The breakup of charged droplets is caused by coulomb repulsion force which leads to decreased surface tension. The desulfurization mechanism of charged droplets depends on physical effect. Net electric charge in the surface of droplets which doesn't have the quality of SO2 absorption only stimulates the progress of droplets absorption.The influence of voltage and liquid flux-gas flux ratio to charge-mass ratio is obtained from the experiments. The experimental results is extraordinary consistent with the theoretical results. The enhancement of SO2 absorption efficiencies in a wet flue gas desulfurization system is investigated by introducing electrostatic effect. SO2 absorption efficiencies by water droplets, with and without charges, are compared, and the results indicate that an increment of 8 percent in SO2 removal efficiency can be obtained with a lower initial concentration of SO2. The experiments also discuss the relations that desulfurization efficiency with the voltage, the liquid flux-gas flux ratio, the incoming concentration of SO2 and the distance from droplets to nozzle. The experimental and theoretical analysis shows that net charges on water droplets are beneficial for SO2 capture. The electrostatic effect can improve surface chemical activity and the distributional uniformity of the droplets in the absorption chamber.