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湿式煙ガス脱硫の排出水のpHの問題

2020-10-09View Original

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湿式煙ガス脱硫(アルカリ液脱硫)では、排ガスの塔出口でのpH値は7~8ですが、なぜ酸化タンクを通過した後(空気を吹き込んで酸化する)にpH値が5~6まで下がるのでしょうか?
Reply #22020-10-09
酸化するとpH値は下がり、亜硫酸は弱酸で、酸化すると硫酸塩になる
Reply #32021-03-09
酸化するとpH値は下がり、亜硫酸は弱酸で、酸化すると硫酸になる
Reply #42022-07-15
この部分(PTU)にはアルカリを加えて防錆処理が必要なのは、まさにそのためです。

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