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傳統SCR脫硝技術已經不能滿足當先工況變化

19

发表时间：2020-08-28 08:29

传统脱硝技术的基础上，结合自身的工程经验和低温环保催化剂技术，开发了适应性更广泛的低温脱硝系统，系统中采用了先进的烟气加热系统，在160--400 ℃的温度范围内都能够达到90 %以上的脱硝效率，甚至在常温下，废气也可以应用SCR技术。析出烟气中过量饱和水在其后增加冷凝器该路线主要针对现有烧结烟气已建湿法脱硫。利用“SDS干法脱硫+中低温SCR脱硝除尘”工艺技术对公司炼焦总厂8号焦炉烟气脱硫脱硝处理。针对上述状况。

本文即該工藝在實際工程中的應用。更接近鋼鐵燒結煙氣溫度。但是目前中低溫SCR脫硝應用于燒結煙氣，仍有四個關鍵問題需要解決。中低溫SCR脫硝催化劑抗毒性較差，易受到煙氣中硫氧化物，水，重金屬等物質的影響，因此中低溫SCR脫硝裝置只能布置在除塵，脫硫塔後部，燒結煙氣溫度，特別是脫硫後的煙氣溫度，無法達到中低溫SCR脫硝反應溫度區間，仍然需要進行煙氣再加熱。

中低溫SCR催化劑對燒結煙氣中的沒有去除作用。更接近鋼鐵燒結煙氣溫度。但是目前中低溫SCR脫硝應用于燒結煙氣，仍有四個關鍵問題需要解決。中低溫SCR脫硝催化劑抗毒性較差，易受到煙氣中硫氧化物，水，重金屬等物質的影響，因此中低溫SCR脫硝裝置只能布置在除塵，脫硫塔後部，燒結煙氣溫度，特別是脫硫後的煙氣溫度，無法達到中低溫SCR脫硝反應溫度區間，仍然需要進行煙氣再加熱。中低溫SCR脫硝與中高溫SCR脫硝催化劑相比。和中高溫SCR脫硝相比其反應溫度區間在200℃以下中低溫SCR脫硝催化劑的造價和運行費用較高。

玻璃厂尾部低温脱硝.png

上一篇脫硫脫硝排放要求越來越嚴格只有技術創新才能滿足環保要求

下一篇水膜脫硫除塵塔有一定脫硝功能

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