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化工进展  2015 

钙基脱硫工艺协同脱硝技术研究进展

DOI: 10.16085/j.issn.1000-6613.2015.10.036, PP. 3755-3761

Keywords: 协同脱除,二氧化硫,氮氧化物,钙基吸收剂,燃煤污染物

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Abstract:

采用钙基吸收剂的烟气脱硫技术拥有95%以上的市场份额,基于钙基烟气脱硫工艺协同乃至同时脱除NOx是最现实可行的技术方向。本文阐明了钙基脱硫工艺协同脱硝的可行性,并根据硫氮协同脱除反应所处的温度区段,将钙基吸收剂硫氮协同脱除技术分为炉内联合脱除、中温同时脱除和低温段协同脱除三类,针对每类技术的基本原理、研究现状和存在的问题进行了分析和总结,指出将NO氧化为NO2在低温段实现SO2和NOx协同乃至同时脱除是最现实可行的技术方向,并针对该技术存在的NO2在低温脱硫工艺中吸收效率低和钙基吸收剂利用率低的问题提出了研究方向。最后,对钙基脱硫工艺协同脱硝技术的发展进行了展望,指出了实施超净排放后基于低温脱硫工艺协同脱硝技术应具有广阔的工业应用前景。

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