Experimental Investigation on Simultaneous Removal of SO2 and NOX by Solutions of Urea and Ammonium Ion-AdditivesReportar como inadecuado




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This article introduces mass transfer theory of the SO2 and NOx liquid absorption and correlation analysis. Simultaneous desulfurization and denitrification with simulated gas wet denitrification using three different combinations of urea and ammonium ion as absorbent has been investigated in a set of two sprinkling absorption reactors filled with steel pall rings in series. A series of experimentations are carried out to research the effect of multi-parameters on the NOx removal, such as gas velocity, L-G ratio, absorbent concentration, gas temperature, absorbent temperature, additive concentration, SO2 concentration and NOx concentration. The experimental results indicate that urea solution on NOx removal is higher than that of ammonium ion solution. At the same time, gas velocity and L-G ratio have important effects on the removal efficiency of SO2, and gas velocity, L-G ratio, system temperature, additive concentration, SO2 concentration and NOx concentration have important effects on the removal efficiency of NOx from flue gas. Based on those results, the optimum operating parameters are obtained; it shows the removal efficiency of SO2 and NOx from flue gas can reach about 95% and 60%, respectively. The results also show the mutual promotion effects when SO2 and NOx are in the same system.

KEYWORDS

urea; ammonium ion; wet; desulphurization; denitrification

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Autor: Jianpu Yin, Yuanquan Xiong, Hongyin Xie, Zhanfei Shi

Fuente: http://www.scirp.org/



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