A semi-wet technological process for flue gas desulfurization by corona discharges at an industrial scale

被引：31

作者：

Yan, KP ^{[1
]}

Li, RN ^{[1
]}

Zhu, TL ^{[1
]}

Zhang, HD ^{[1
]}

Hu, XT ^{[1
]}

Jiang, XD ^{[1
]}

Liang, H ^{[1
]}

Qiu, RC ^{[1
]}

Wang, Y ^{[1
]}

机构：

[1] Beijing Jiaotong Univ, Beijing, Peoples R China

来源：

CHEMICAL ENGINEERING JOURNAL | 2006年 / 116卷 / 02期

关键词：

streamer; flue gas desulfurization; semi-wet technological process; ac/dc power supply; partitioned wet reactor;

D O I：

10.1016/j.cej.2005.09.030

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

An industry-scale semi-wet technological process for flue gas desulfurization by corona discharges is recommended. Its characteristics are: (1) it uses an ac/dc power supply to generate uniformly distributed streamer plasmas; (2) it uses a partitioned wet reactor system in which SO2, in the flue gas is absorbed with ammonia water in its thermal chemical reaction stage and the generated solution is repeatedly sprayed and transferred at an appropriate flow rate to the successive plasma reaction stage under the conditions of keeping liquid flow in balance. In the plasma stage, SO2, absorption by the liquid is enhanced by the electric wind and the sulfites in the solution experiences plasma oxidization; (3) drying up the end liquid to produce powder-typed byproduct and discharging the end gas after heat exchange with the hot gas at the inlet. Through a pilot test of 12,000 Nm(3)/h capacity of flue gas with an initial SO2, concentration of about 500 ppm, results of desulfurization rate > 95%, energy consumption in the reactor 1.8 Wh/Nm(3), ammonia slip less than 5 ppm and qualified fertilizer byproduct are obtained. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：139 / 147

页数：9

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