What is the material flow in the acetylene gas tank during the PVC process?
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This post was last edited by sson on 2010-8-23 21:13. The acetylene gas tank has a function of supplying air to the generator when negative pressure occurs in it; I’m curious as to how this is achieved During the process flow, acetylene gas passes through a spray cooling tower and a packed cooling tower before splitting into two paths: one leads to the water ring compressor, while the other goes to the liquid seal in the gas holder and then to the gas holder itself. I’m a bit confused here; according to the process, shouldn’t we go straight to the water ring compressor? Under normal circumstances, acetylene here shouldn’t go to the gas tank due to the water seal in the gas tank, right? Where does the acetylene gas in that gas holder come from? Is part of the buffer tank at the back going to the degassing tank? PS: I’m a beginner and there are many things I don’t understand; please give me some guidance.
The gas tank serves only as a storage area; any acetylene that cannot be pumped out by the water ring pump ends up in the gas tank, causing its level to rise. When there isn’t enough acetylene from the generator to meet the pumping needs of the water ring pump, the acetylene stored in the gas tank is used to make up the difference, which then causes the level of the gas tank to drop.
This post was last edited by happyomer on 2010-8-24 at 14:46. Thank you to the moderator for their support; however, I still don’t understand how the liquid seal in the gas tank works. Are there a positive liquid seal and a negative liquid seal, each serving to store acetylene and to immediately supply air to the generator when negative pressure occurs, thereby maintaining positive pressure?
Yes, acetylene generators have a positive water seal and a negative water seal. The positive water seal prevents the gas exiting the generator from flowing back into it, while the negative water seal is connected to the gas tank; when the pressure inside the generator is low, the gas tank can supply pressure to it.
The generator is equipped with a forward water seal, a reverse water seal, and a safety water seal. But it seems these water seals aren’t necessary on the gas holder.
You’ll understand once you go to the site; one needs to have a certain level of understanding when working in the chemical industry.