[烟气条件对直流电晕自由基簇射氧化NO过程的影响]

[Effect of flue gas conditions on NO oxidation process by DC corona radical shower].

作者信息

Wu Zu-liang, Gao Xiang, Li Ming-bo, Zhang Yuan-shang, Wu Zu-cheng, Luo Zhong-yang, Ni Ming-jiang, Cen Ke-fa

机构信息

Clean Energy and Environment Engineering Key Lab of Ministry of Education, Zhejiang University, Hangzhou 310027, China.

出版信息

Huan Jing Ke Xue. 2005 May;26(3):7-11.

PMID:16124460

Abstract

Using an air-H2O DC corona radical shower system, the influences of reside time of flue gas in the reactor, velocity of flue gas and NO concentration on NO oxidation process were studied. The results show that the increasing velocity of flue gas can restrain corona development and the increasing NO concentration can make discharge more easy. The reside time of flue gas in the reactor has less effect on the NO oxidation. The NO oxidation rate increased only from 54.5% to 57.6% at 2 W input power when the reside time of flue gas in the reactor increased from 8.5 s to 34.2 s. However, the velocity of flue gas has important effect on the NO oxidation. At 1.7 W x h/m3 energy density, when the velocity of flue gas increased from 1.4 cm/s to 6.3 cm/s, the NO oxidation rate dropped from 60.0% to 38.6% and the energy yield also falled from 20.8 g/(kW x h) to 13.3 g/(kW x h). Under the certain flux of humid air, NO initial concentration has a best value, which was about 100 x 10(-6) in this experiment.

摘要

利用空气 - 水直流电晕自由基喷淋系统，研究了烟气在反应器中的停留时间、烟气速度和NO浓度对NO氧化过程的影响。结果表明，烟气速度增加会抑制电晕发展，NO浓度增加会使放电更容易。烟气在反应器中的停留时间对NO氧化的影响较小。当反应器中烟气停留时间从8.5 s增加到34.2 s时，在2 W输入功率下，NO氧化率仅从54.5%增加到57.6%。然而，烟气速度对NO氧化有重要影响。在1.7 W·h/m³能量密度下，当烟气速度从1.4 cm/s增加到6.3 cm/s时，NO氧化率从60.0%降至38.6%，能量产率也从20.8 g/(kW·h)降至13.3 g/(kW·h)。在一定的湿空气通量下，NO初始浓度有一个最佳值，在本实验中约为100×10⁻⁶。