How about using hydrogen peroxide for desulfurization and humidification in sulfuric acid exhaust gas treatment?
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As described in the title, for the 500kt/a smelting flue gas acid production system, H2O2 is used for desulfurization of the exhaust gases; the concentration of hydrogen peroxide in the storage tanks is 27–30%, while the concentration of hydrogen peroxide in the circulating liquid is very low after dilution； Due to increasing environmental regulations regarding the levels of solid particulates and acid mist in exhaust gases, it is planned to use a wet electrostatic precipitator after desulfurization with hydrogen peroxide in order to reduce these levels. I found many reports online about hydrogen peroxide explosion accidents, and they were quite serious. I would like to ask industry professionals: when this type of process design is put into operation, what is the likelihood that the hydrogen peroxide introduced could cause discharge in the wet electrostatic precipitator, thereby creating a risk of explosion for that device? Which companies in the same industry are using this process? @Lu Doujiang @YiYeQingCha @Zhang Ruqing @Pfz2867 @E Guan Man Ying @zhao*rui
I’ve seen many hydrogen peroxide back-pumps equipped with WESP, and I’ve never heard of any explosions occurring.
Guided by a technician who said it might explode, worried as I was, I came to the large group to ask for advice. Thank you, Happy Dragon Boat Festival!
During the hydrogen peroxide desulfurization process, there isn’t much excess hydrogen peroxide, and the oxygen content in the flue gas is already low to begin with.
For the exhaust hydrogen peroxide, it’s probably equipped with an electrostatic mist eliminator. The hydrogen peroxide content helps regulate the concentration of sulfur dioxide in the flue gas; thus, the likelihood of an explosion is quite low
Is there an explanation for why it exploded? Sharing, learning*learning*. Have you considered adding one more stage of alkaline absorption? We also use hydrogen peroxide for desulfurization; currently, we haven’t added anything else.
There is no explanation for this; then they started at the top of the windows in our hydrogen peroxide storage room and broke all the bricks away, just to ensure safety? Lye desulfurization is not enabled. Five-stage conversion with sulfuric acid, desulfurization using hydrogen peroxide, and humidification via electricity. Ion liquid desulfurization and humidifying electrodes are used for the treatment of flue gas in circular systems.
Thank you; I’ve learned a lot recently, and my concerns about the device exploding due to hydrogen peroxide-based desulfurization and humidification have been dispelled.
This post was last edited by Zhang Ruqing on 2018-7-12 at 14:01. Tianjin Boda Sulfuric Acid Industry Co., Ltd. uses this process for desulfurization. Results: Before absorption, sulfur dioxide level: 850 mg/m3, sulfuric acid mist: 10 mg/m3; after absorption, sulfur dioxide level: 165 mg/m3, sulfuric acid mist: 1 mg/m3
This post was last edited by Zhang Ruqing on 2018-7-12 at 14:10. Hydrogen peroxide poses a risk of explosion; it decomposes easily and releases heat, and this heat in turn accelerates its decomposition, generating more gas. This increase in pressure inside the storage containers can lead to an explosion. However, by ensuring that the storage temperature does not exceed 40°C, avoiding direct sunlight, maintaining good ventilation around the storage area, or burying the tanks underground with protective measures to shield them from sunlight, explosions can be completely prevented