For desulfurization of acid exhaust gases using hydrogen peroxide, what is the concentration of hydrogen peroxide to be used?
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Question: For desulfurization of acid-making tail gas using hydrogen peroxide, what concentration of hydrogen peroxide should be used? To what concentration does it still need to be diluted? , before entering the desulfurization tower? What other things need to be noted during operation?
It is preferable to dilute hydrogen peroxide before use; generally, we dilute it to around 14%. This helps reduce the formation of acid mist after it is introduced into the desulfurization tower. The typical industrial concentration of hydrogen peroxide is 27.5%. During operation, it’s crucial to properly install fiberglass-reinforced plastic pipes during construction, while minimizing the use of flange connections as much as possible
Currently, there are two processes for adding hydrogen peroxide in domestic hydrogen peroxide-based desulfurization systems: one involves using a metering pump to directly add 27.5% hydrogen peroxide into the desulfurization tower or pipelines, while the other involves diluting the hydrogen peroxide with water to a concentration of less than 8.5% before adding it to the desulfurization tower.
May I ask, in the hydrogen peroxide desulfurization tower, what is the controlled level of hydrogen peroxide content in the dilute acid circulating in the upper tower?
It’s between 0.5% and 1.5%. . .
Why does the addition of hydrogen peroxide to the desulfurization tower produce large amounts of acid mist?
What is the concentration of hydrogen peroxide in the absorption system near the tower?
We add 27.5% hydrogen peroxide to the desulfurization tower and then dilute it with water; we’re not sure about the acid concentration inside the tower. Add hydrogen peroxide based on the sulfur dioxide content in the exhaust gases. Sometimes, it is difficult to control the foaming of hydrogen peroxide inside the tower, which affects the inlet pressure of the desulfurization tower. How to eliminate such problems.
The acid concentration inside the desulfurization tower is generally kept between 20% and 30%; too high a concentration of acid can affect the desulfurization efficiency of hydrogen peroxide.