Effect of adding hydrogen peroxide to concentrated sulfuric acid on geometry
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Using hydrogen peroxide is very effective for desulfurizing the sulfuric acid-containing exhaust gases generated in smelting processes. The acidity of the acid in the desulfurization cycle is around 10%, with the concentration of hydrogen peroxide being controlled at 0.5%. The resulting dilute sulfuric acid is sent to the dry absorption unit. I would like to ask my colleagues: what impact does the use of this hydrogen peroxide-based dilute acid instead of process water in the dry absorption unit have on its performance? Will it have an impact on the mixed acid mixer (steel-lined with PTFE)? Does dilute acid with hydrogen peroxide added have an impact on the quality of sulfuric acid?
Geometry should remain unaffected; it is chemistry and chemical engineering that are affected.
When producing acid from smelting flue gas, the acid concentration is kept a bit low; the gas coming out of the second absorption stage contains no water, so the acid concentration can be increased, which reduces the amount of dilute acid produced. Of course, keeping the acid concentration low is still beneficial for desulfurization
After replacing process water with diluted hydrogen peroxide acid, feedback from the workshop indicated that the lifespan of the mixer became shorter, and the PTFE lining was severely deformed.
In the early stages, the control level was high, with an acidity of 20%, but it was reduced later on
Previously, our desulfurization cycle fluid was also fed into the second absorption tower; there was corrosion in both the acid separator and the flue gas duct at the outlet of the second absorption tower. Now that it is used as dilution water in the product tank, no corrosion has been observed; I’m not sure why
Finished product tank added; 93 acid produced by dilution method. I produce it directly here. No impact on the acid splitter has been observed so far after using desulfurized dilute acid in the suction circulation tank.
How long has it been since the dilution with Xiangyi was done? The acid concentration of the desulfurization solution here is around 10%; it becomes 98% during summer. When the acid concentration is about 20%, foaming tends to occur. I wonder if this happens in your area as well. Currently, the sulfur dioxide levels in the exhaust gases are between 20 and 30
This post was last edited by hnfxl689 on 2020-3-10 09:12. Initially, the acidity was controlled at 20-25%; for other reasons, it is now kept around 10%, resulting in less foaming, while a acidity level of 20% leads to more foaming.
It shouldn’t have any impact; we keep the dilute acid at 20%, add one dose, and ensure that the hydrogen peroxide level is below 0.1