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臨汾萬鑫達焦化 焦爐煙氣脫硫+脫白效果顯著

發布日期:2019-01-15 瀏覽次數:281

      目前國內絕大多數燃煤電廠、焦化、鋼鐵行業的煙氣在排放前大都進行了濕法脫硫,溫度降至45℃~55℃,此時的煙氣通常是飽和濕煙氣,煙氣中含有大量水蒸汽、溶解性鹽、SO3、凝膠粉塵、微塵等(都是霧霾的主要成分)。如果煙氣從濕法脫硫后直接排出,進入溫度較低的環境空氣中,煙氣中的水蒸汽會凝結形成濕煙羽,不僅對大氣造成視覺上的污染而且還造成實質上的污染。

      隨著霧霾天氣的加重,國家環保標準和要求越來越高、越來越嚴格,濕法脫硫導致大量水汽攜帶未能完全濾除的塵、鹽,進入大氣之中,形成煙羽。大家認為這助推了霧霾的形成,所以各地紛紛出臺環保規定,要求電廠、鋼廠、焦化等企業,要對自己排放的煙氣進行除濕脫白,消除煙羽。

      為滿足環保要求,更好地改善大氣環境質量,臨汾萬鑫達焦化有限責任公司決定采用安徽威達“SDS干法脫硫技術”取代原濕法脫硫。滿足 《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, SO2≤20mg/Nm3,粉塵濃度≤10 mg/Nm3,以達到210萬噸焦炭/年焦爐煙氣脫硫+脫白目的。

      SDS干法脫硫比對濕法脫硫主要優勢:

1. SDS干法脫硫全系統無工業水消耗和廢水產生,更不會增加焦爐煙氣本身的濕含量;

2. 脫硫劑直接噴入煙道、無脫硫塔,不增加脫硫系統阻力;

3. SDS脫硫效率高達95 %以上;

4. 靈活性高,可以隨時根據煙氣中酸性物質的含量自動調節脫硫劑的噴入量來保證最終的排放指標;

5. 系統簡單,操作維護方便;

6. 副產物產生量少,硫酸鈉純度高,方便利用;

7. 系統不需要做特殊的防腐;

8. 無大白煙的產生;

      目前臨汾萬鑫達焦化有限責任公司210萬噸焦炭/年焦爐煙氣SDS干法脫硫+脫白項目已調試完畢,正式投入使用,效果顯著。通過上傳環保局的在線監測顯示SO2排放達到10mg/Nm3以下。

   

脫白效果對比

      安徽威達環保從事環保行業20余年歷史,在中低溫脫硝、脫硫、除塵三個大氣治理領域方面擁有豐富的先進技術儲備和大量的成功工程案例,在焦化、燒結、水泥行業尤為突出。安徽威達環保愿與您攜手共創藍天碧水,讓蔚藍的天空,優美的環境,因我們而更好!


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