Reason for adding concentrated sulfuric acid to the acid mist scrubber for chlorine gas
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This post was last edited by sunjl1981 on 2013-1-6 23:26. What is the reason for adding acid in acid mist scrubbing? This post was last edited by *ajiesse on 2007-12-18 16:31.] # ， ， &
The reason for adding concentrated sulfuric acid lies in the structure of the acid mist trap ____ The deacidification port at the bottom of the acid mist trap is a pipe that needs to be sealed with liquid in order to prevent chlorine gas from passing through it, thus ensuring effective capture of acid mist. Therefore, adding concentrated sulfuric acid serves to create a liquid seal and prevent gas from bypassing the system.
1. In some designs, the feed pipe of the inner tank itself comes equipped with a small hopper; once sulfuric acid enters, it creates an acid seal, so there is no need to add more acid； 2. As mentioned by the original poster, the amount of acid is high; this high concentration of acid makes it difficult to recover sulfuric acid during the processing in the equipment. Moreover, chlorine is present in the acid, which has an impact on the atmosphere. It is recommended to make changes to the way the material is fed into the tank.
Because the acid mist collector captures acid mist, what is collected is sulfuric acid. Given its corrosiveness, only concentrated sulfuric acid can be used as a liquid seal, not water.
Our factory’s acid mist collectors do not have an acid addition device, and this is related to the installation location of these collectors. The acid mist collectors in our factory are installed at a height of 8 meters; the sulfuric acid outlet pipe at the bottom connects to the liquid level inside the sulfuric acid circulation tank on the first floor, thereby ensuring a seal and preventing backflow.
This is related to the design of the filter element. At the bottom of the Monsanto filter element, there is a plastic tube that must be inserted into concentrated sulfuric acid in order to prevent chlorine gas from passing through this tube and causing a short circuit. This has nothing to do with the sulfuric acid U-shaped liquid seal used in the degassing tower. The last edit to this post was made by ccedrj123 on 2008-2-22 at 18:01
This is determined by the structure of each type of acid mist collector. Previously, the Tianjin Lizhong acid mist collectors required a sulfuric acid seal, and the Mengmoke collectors we used also needed such a seal. The British Bahaus acid mist collectors in use today do not require one; instead, a U-shaped seal is sufficient to be added to the pipe used for draining acid at the bottom