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湖南高粉塵煙氣scr除塵項目

  煙氣高效除塵脫硫塔集脫硫除塵為一體,塔體內結構為:沖擊、噴淋、旋流、浮動床等,噴嘴設計獨特,采用特種技術制作的螺旋噴嘴,在一定的壓力下,噴射出實心水霧,粉塵及有害氣體與水霧充分接觸,故除塵、脫硫、除黑、脫霧效果高。除塵率≥98%,二氧化硫脫除率≥90%,煙氣林格曼黑度<1級。

  在金屬催化劑作用下,以NH3作為還原劑,將NOx還原成N2和H2O。NH3不和煙氣中的殘余的O2反應,而如果采用H2、CO、CH4等還原劑,它們在還原NOx的同時會與O2作用,因此稱這種方法為“選擇性”。

  主要反應方程式為:

  4NH3+4NO+O2─>4N2+6H2O

  8NH3+6NO2 ─>7N2+12H2O

  

 

  (高粉塵煙氣scr除塵工藝流程圖)

  

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