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脫硫技術

發布日期:2018-05-24 瀏覽次數:6622

1、干法脫硫技術

SDS干法脫硫工藝簡介

  SDS干法脫酸噴射技術是將高效脫硫劑(20-25μm,主要成分碳酸氫鈉)均勻噴射在管道內,脫硫劑在管道內被熱激活,比表面積迅速增大,與焦爐煙道氣充分接觸,發生物理、化學反應,煙氣中的SO2等酸性物質被吸收凈化,凈煙氣由增壓風機經出口煙道至原煙囪排入大氣。

(1)沒有脫硫塔,不需要大量固體循環灰在塔內循環,也不需要噴入漿液,系統簡單,運行阻力低,操作維護方便。

(2)脫硫效率高,合理的脫硫劑均布裝置。

(3)一次性投資很少,占地面積很小,運行成本低。

(4)全干系統、無需用水。

(5)對酸性物具有100%的脫除率。

(6)靈活性很高,可以隨時適合最嚴格的排放指標。

(7)對焦爐工況適應性強。


2、 半干法脫硫技術

a、 SDA半干法脫硫技術

SDA半干法脫硫工藝簡介

  焦爐煙道氣從脫硫塔入口進入SDA(旋轉噴霧干燥)吸收塔中,與被霧化的脫硫劑(Na2CO3/CaO)漿液接觸,發生物理、化學反應,煙氣中的SO2被吸收凈化。經吸收SO2并干燥的含粉料煙氣出吸收塔進入布袋除塵器進行凈化及進一步的脫硫反應,袋式除塵器除下的灰部分經過空氣斜槽進入循環灰倉循環利用,以提高脫硫劑的利用率,另一部分灰由倉泵打入灰庫外排,凈煙氣由增壓風機經出口煙道至原煙囪排入大氣。

(1)系統簡單,運行阻力低,操作維護方便。

(2)脫硫效率高,合理的而均勻的氣流分布。

(3)SDA法水耗低、對水質適應性強。

(4)漿液量隨時而靈活的自動調節。

(5)對酸性物具有100%的脫除率。

(6)脫硫劑采用Na2CO3/CaO粉加水制成Na2CO3/CaO漿液。

(7)對焦爐工況適應性強。


b、CFB半干法脫硫技術


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