SCI和EI收录∣中国化工学会会刊

›› 2011, Vol. 19 ›› Issue (3): 518-522.

• • 上一篇    下一篇

Removal of SO2 and NOx by Pulsed Corona Combined with in situ Ca(OH)2 Absorption

黄立维, 党永霞   

  1. College of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou 310014, China
  • 收稿日期:2010-12-07 修回日期:2011-03-31 出版日期:2011-06-28 发布日期:2011-06-28
  • 通讯作者: HUANG Liwei, E-mail: hlw@zju.edu.cn
  • 基金资助:
    Supported by the Science and Technology Development Project of Zhejiang Province(2007C13085);Hangzhou City(20070733B28)

Removal of SO2 and NOx by Pulsed Corona Combined with in situ Ca(OH)2 Absorption

HUANG Liwei, DANG Yongxia   

  1. College of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou 310014, China
  • Received:2010-12-07 Revised:2011-03-31 Online:2011-06-28 Published:2011-06-28
  • Supported by:
    Supported by the Science and Technology Development Project of Zhejiang Province(2007C13085);Hangzhou City(20070733B28)

摘要: Removal of SO2 and NOx by pulsed corona combined with in situ alkali absorption was experimentally investigated.In the reactor,a plate-wire-plate combination is devised for generating pulsed corona and then alkaline absorbent slurries were introduced into the reactor by a continuous band conveying system to capture the gaseous reaction products.It was found that both SO2 and NO could be removed by corona combined with in situ alkali absorption.The removal of SO2 increased to 75% with the corona discharge,compared with 60% removal only with Ca(OH)2 absorption.About 40% removal of NO was reached by pulsed corona combined with in situ Ca(OH)2 absorption.It was found that SO2 and NO in the gas stream are oxidized to SO3 and NO2 by pulsed corona respectively,and then absorbed by the alkali in the reactor.The removals of SO2 as well as NO were higher with Ca(OH)2 as the absorbent,compared with using CaCO3 or ZnO.

关键词: pulsed corona, absorption, denitrification, desulfurization, removal, Ca(OH)2

Abstract: Removal of SO2 and NOx by pulsed corona combined with in situ alkali absorption was experimentally investigated.In the reactor,a plate-wire-plate combination is devised for generating pulsed corona and then alkaline absorbent slurries were introduced into the reactor by a continuous band conveying system to capture the gaseous reaction products.It was found that both SO2 and NO could be removed by corona combined with in situ alkali absorption.The removal of SO2 increased to 75% with the corona discharge,compared with 60% removal only with Ca(OH)2 absorption.About 40% removal of NO was reached by pulsed corona combined with in situ Ca(OH)2 absorption.It was found that SO2 and NO in the gas stream are oxidized to SO3 and NO2 by pulsed corona respectively,and then absorbed by the alkali in the reactor.The removals of SO2 as well as NO were higher with Ca(OH)2 as the absorbent,compared with using CaCO3 or ZnO.

Key words: pulsed corona, absorption, denitrification, desulfurization, removal, Ca(OH)2