Experimental Study And Numerical Simulation Of Wet Flue Gas Desulfurization Of Jetting Liquid Column Tower

With the advancement of society and the development of industry, the pollution and endangerment to environment caused by SO₂ is more and more serious. So we must control the emition of SO₂ in an effective way.Wet flue gas desulfurization(WFGD) technologies are the most common and developed treatments for removal of sulfur dioxide from combustion of fossil fuels in the world. The dominating WFGD technology is limestone-gypsum WFGD using spray scrubber. There are many advantages for spray scrubber, but there are also some disadvantages. For example, more energy consumption is needed for recycling pumps, and high requirements are needed for nozzles because of spray. Because flue gas at the outlet to absorber carries liquid drops, mist elimination is difficult, and it is difficult to increase the gas velocity in absorber, and corrosion is serious for the devices after desulfurization. Facing the problems about spray scrubber, the new-style jetting liquid column reactor is brought forward in this paper.Experimental equipment, experimental principles and the way to analyze the data are introduced in the paper. We used two Testo gas analysiser simultaneously, at the end of every equal time interval, to reduce the impact of periodical tiny change of experimental condition caused by the system. We should get as many characteristic parameters of chemical absorption equipment as possible by means of experimental research.The paper studied the effects of the operational and the structural parameters on the desulfurization efficiency and gas humidity with the falling film desulfurization device, here the parameters include the the gas velocity, the inlet gas temperature, SO₂ concentration, the shape of nozzle etc. Decrease of the diameter of the nozzles result s in better atomization, which greatly increases the desulfurization efficiency. With optimized geometry and operation parameters, the desulfurization efficiency can be improved to 90 %.The paper simulated the velocity field and concentration field with FLUENT program of CFD. From the calculated results of the velocity distribution, DPM concentration, we come to the conclusion that the the comparative desulphurization efficiency of two jetting liquid column reactors.