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專注煙氣治理高新技術企業/提供第三方環保設施運營托管服務
0551-65661796 / 0555-4350511

山西陽光焦化集團焦爐煙氣SCR脫硝項目順利開機

發布日期:2019-01-07 瀏覽次數:173

      隨著環保形勢日趨嚴峻,煙氣排放標準日益嚴格,焦化廠焦爐環保改造項目也隨之緊張起來。為了滿足國家最新環保標準要求,山西陽光焦化集團股份有限公司決定對其5#、6#140萬噸/年焦爐煙氣脫硝項目進行改造,并由安徽威達環保承建。

      針對本項目特征,安徽威達環保采用中低溫SCR(選擇性催化還原法)脫硝工藝,每座焦爐用一套SCR脫硝裝置。脫硝裝置位于余熱鍋爐前的煙氣高溫段,在脫硝裝置入口NOx濃度最大1000mg/Nm3(標態,濕基),氨水蒸發熱源采用脫硝后高溫煙氣與潔凈空氣換熱得到的高溫空氣作為熱源,同時也作為氨氣的稀釋風,在氨水蒸發器內將氨水蒸發稀釋成濃度不超過5% 的氨氣,將氨與水全部蒸發進入噴氨格柵,通過噴氨格柵均勻的分配到SCR 反應器催化劑表面,發生催化還原反應,最終出口排放濃度達到 《煉焦化學工業污染物排放標準》 (GB16171-2012)中的特別排放限值要求,即NOx≤100mg/Nm3,NH3逃逸小于2.5mg/Nm3。

      該脫硝工藝有兩大優點:一是因脫硝在余熱鍋爐前高溫段,煙氣溫度比較高,煙氣經過脫硝后溫降不大,氨水蒸發熱源利用脫硝后的高溫煙氣與空氣換熱,節省了加熱蒸氨所需要大量的煤氣;二是解析后的煙氣直接接入余熱鍋爐后,免除了催化劑高溫解析后的煙氣里物質粘附在鍋爐列管上。

      本次工程工期短、任務重。自2018年8月份進場以來,安徽威達環保現場施工人員每天頂著烈日,冒著酷暑,加班加點推進項目建設,最終克服重重困難,于近日,5#焦爐脫硝成功試開機,6#焦爐脫硝也即將開機。

      安徽威達環保根據不同項目的實際情況,設計出最佳方案,在保證排放達標的前提下,做到最大限度節約投資和運行成本,最終交付給業主們滿意的工程。

极速六合彩
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