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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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scr脱硝系统催化剂磨损机理分析与治理
, PP. 119-125
Keywords: 锅炉,脱硝系统,scr,数值模拟,飞灰,颗粒场,催化剂磨损,治理
Abstract:
国内某超超临界660mw机组直流锅炉脱硝系统选择性催化还原（scr）催化剂出现严重磨损，导致脱硝装置失效,经检查发现磨损区域集中于催化剂的近锅炉侧。结合数值模拟及现场试验数据,分析得出催化剂局部磨损的形成机理是烟道内飞灰质量浓度分布不均匀,造成飞灰颗粒富集在催化剂近锅炉侧,长期冲刷催化剂局部。通过调整？型烟道水平段第1组导流板位置、减少导流板的数量并增加撞击式导流装置后,scr装置内？型烟道水平段和催化剂上部竖直烟道的烟气流场及飞灰颗粒场的分布更加均匀,？型烟道水平段飞灰质量浓度相对均方根由优化前的0.331减至0.241,有效解决了scr催化剂局部严重磨损问题。
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