等离子烟气硫、硝、汞一体化脱除的中试研究

Pilot Study on Simultaneous Removal of Sulfur,Nitrate and Mercury from Coal-flue Gas by Plasma

利用自主研发的窄脉冲高压电源放电产生的等离子体对某燃煤电厂脱硫后烟气中的硫、硝、汞一体化脱除进行研究。结果表明:脉冲放电等离子体作用后烟气中的NO、SO_2和Hg^0浓度明显降低;喷水或喷雾对等离子脱除NO没有明显影响,而喷水时SO_2的脱除效率却有明显提高,但单独喷雾作用其也无明显变化;提高脉冲频率利于NO和SO_2的脱除;本文研究对脉冲放电等离子燃煤烟气脱硫脱硝工业化应用具有一定指导意义。

The simultaneous removal of sulfur,nitrate and mercury from coal-fired flue gas after desulfurization was studied through plasma through plasma produced by the narrow pulse high voltage discharge. The results showed that the concentration of NO, SO2 and Hg0 in flue gas was decreased obviously after pulsed discharge plasma. Water spraying or spraying had no obvious influence on the removal of NO under plasma treatment, but the removal efficiency of SO2 was increased obviously when spraying water,and there was no changed under pure spraying. The increase of pulse frequency was beneficial to removal of NO and SO2. This research had a guiding significant for industrial application of pulse discharge plasma on desulfurization and denitrification from flue gas.