Determining the role of ORP in exhaust gas desulfurization
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In our plant’s waste acid pyrolysis and regeneration unit, the flue gas desulfurization process makes use of the hydrogen peroxide method. There is an ORP meter for the circulating liquid in the tower, with values expressed in mv; does this value represent the concentration of hydrogen peroxide in the reaction solution? What is the purpose of this watch? It keeps showing around 580 – is this value appropriate? I’m seeking help from experts in the chemical industry; I’m a beginner asking for guidance
Isn’t it good to use the sulfur dioxide levels in exhaust gases as a feedback mechanism?
ORP reflects the redox potential of water, not the reaction concentration, but it is related to concentration to some extent; a higher value indicates greater oxidizing power. It can also be understood as meaning that the higher the concentration of hydrogen peroxide, the better. In the past it was around 600 or so, and that’s roughly the same range. Depending on the desulfurization efficiency, values between 500 and 650 are considered normal
When the exhaust pipe is in proper condition, using too much hydrogen peroxide seems to result in more foam; the overflow tube sometimes keeps producing foam