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SCR烟气脱硝对PM2.5排放特性的影响机制研究

束航 ,  张玉华 ,  杨林军 ,  刘亚明 ,  李方勇 ,  徐齐胜 ,  盘思伟

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引用本文: 束航, 张玉华, 杨林军, 刘亚明, 李方勇, 徐齐胜, 盘思伟. SCR烟气脱硝对PM2.5排放特性的影响机制研究[J]. 燃料化学学报, 2015, 43(12): 1510-1515. shu
Citation:  SHU Hang, ZHANG Yu-hua, YANG Lin-jun, LIU Ya-ming, LI Fang-yong, XU Qi-sheng, PAN Si-wei. Effects of SCR-DeNOx system on emission characteristics of fine particles[J]. Journal of Fuel Chemistry and Technology, 2015, 43(12): 1510-1515. shu

SCR烟气脱硝对PM2.5排放特性的影响机制研究

    通讯作者: 杨林军,E-mail:ylj@seu.edu.cn
  • 基金项目:

    国家重点基础研究发展规划(973计划,2013CB228505) (973计划,2013CB228505)

    广东电网有限责任公司科技项目(K-GD2013-055)资助项目 (K-GD2013-055)

摘要: 采用V2O5-WO3/TiO2催化剂,对选择性催化还原(SCR)烟气脱硝装置出口PM2.5物性进行分析,考察SO2氧化与PM2.5形成的关系,并采用原位漫反射红外光谱(DRIFTS)对SCR脱硝过程中NH4HSO4的生成及SCR脱硝温度条件下的NH4HSO4热稳定性进行了分析研究。结果表明,经SCR脱硝后,亚微米级细颗粒数浓度明显升高,且形貌特征及元素组成发生变化,形成的细颗粒主要为NH4HSO4及少量(NH4)2SO4;SCR烟气脱硝对PM2.5排放特性的影响主要通过以下途径:一是SO3与SCR烟气脱硝系统中的NH3、H2O反应形成;二是SO3与逃逸的NH3、H2O在SCR脱硝装置后续系统发生反应形成硫酸氢铵与硫酸铵;此外还与SO3和烟气中游离的CaO等碱土金属氧化物反应形成硫酸盐,随烟气携带出SCR脱硝装置有关。

English

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  • 收稿日期:  2015-06-02
  • 网络出版日期:  2015-08-27
通讯作者: 陈斌, bchen63@163.com
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