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脫硝中的溫度、粉塵的變化充分暴露SCR實際應用的不穩定性

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发表时间：2020-08-01 08:14

　　玻璃，陶瓷，水泥，钢铁和焦化等非电行业NOx（氮氧化物）的污染比重逐年增长，在参考火电行业脱硝经验基础上，应根据各自烟气特点发展合适的脱硝手段。目前SCR脱硝是为比较理想的技术，但仍需进行改进: 大多行业的排烟温度均比现有成熟脱硝催化剂的温度窗口低，应开展低温脱硝催化剂研究工作。总体来说为适应不同行业烟气的复杂多样性、复杂性、温度不稳定性等；需在技术上不断完善与创新。

　　火电行业在SCR成熟应用的背景下随着对NOx排放限值的不断收严研发具有抗硫，抗碱金属和抗重金属性能的催化剂应引起重视。催化剂以“钒钨钛”系为主，温度范围通常为320~420℃。锅炉低负荷行时， SCR 入口烟气温度低于催化剂活性温度，受此限制脱硝系统需强制退出。但是，环保部要求火电机组在任何电负荷下必须排放达标。

在相当长一段时间内因此保证 SCR 低负荷下的脱硝效率是火电灵活性改造的重点工作之燃煤机组的宽负荷脱硝改造势在必行。高尘”布置SCR 脱硝仍然是中国脱硝技术领域和脱硝市场的主流技术。中国煤电机组的SCR 脱硝系统 (以下简称 SCR) 多采用“高温。沧州中创环保是煤气化设备，烟气脱销，烟气脱硫，除尘设备开发，安康脱硝脱硫设备，工程设计和制造安装的综合性公司。

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