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OALib Journal期刊
ISSN: 2333-9721
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选择性催化还原工艺中硫酸氢铵形成机理及影响因素
, PP. 75-78
Keywords: 烟气脱硝,选择性催化还原,硫酸氢铵,氨逃逸,空气预热器
Abstract:
论述了选择性催化还原（scr）烟气脱硝过程中硫酸氢铵(abs)的形成机理，并分析了温度、氨逃逸量、so？3浓度、飞灰等对abs形成的影响规律。分析表明：abs的形成温度为190~240℃；当温度在320~345℃时abs为气相，当温度高于345℃时abs开始分解；为减少abs的生成量，可通过控制nh？3/no？？x？摩尔比在0.8~1.2之间，以减少氨逃逸量，同时尽可能减少烟气中so？2氧化率；调节scr工艺运行温度，控制abs在催化剂中的沉积，可避免催化剂堵塞和腐蚀。
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