Should separation equipment be installed in the exhaust gas treatment process?
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This post was last edited by adsl121 on 2010-8-8 22:51. What do you think? In Scott’s exhaust gas treatment process, is it necessary to install a separation tank for the process gas coming out of the quench tower and the top of the absorption tower? Is such a tank really needed? The process gas in our plant does not contain impurities such as ammonia. I think that if the air distribution is inappropriate or if there are abnormalities in the tower, it could lead to contamination of the amine solution Also, when abnormal phenomena such as tower flooding occur in the absorption tower, wouldn’t the amine solution end up being carried into the tail furnace? And even under normal conditions, some of the amine solution is carried away by the process gas, which increases the loss of amine solution. What do you all think about this?
There is no need for a liquid separation tank at the outlet of the quench tower, as all impurities remain in the quench water, while only the gas phase comes out. However, a liquid separation tank must be installed at the outlet of the absorption tower; otherwise, as you said, large amounts of water and amine solution will enter the incinerator, often causing overpressure or even shutdown of the incinerator.
This post was last edited by Shandong Huaxing on 2010-8-9 at 22:36. There is no need to install a separate separation tank; something similar is already built into the top of the absorption tower. Its function is exactly as you said.
For new installations, as you mentioned, a liquid separation tank can be added at the top of the absorption tower; however, for existing installations, an additional liquid separation tank has to be installed externally.
After installing a wire mesh demister at the top of the absorption tower, it is still necessary to add a separator behind the absorption tower; what if there is a high pressure difference in the absorption tower and liquid carryover occurs? Besides, is the wire mesh demister damaged? It is advisable to install a separator after all.
A demister can only remove a small amount of liquid; it is ineffective when there is a significant amount of liquid present or during tower flushing.
Reply to 2# Clauspolunit: Liquid can also be carried away in the gas phase, which would then contaminate the amine solution.
This post was last edited by Shandong Huaxing on 2010-8-11 at 21:39. A book on Scott processes recommends the use of a separation tank, but our factory doesn’t have one. Do the units owned by other users have this equipment? Has it ever happened that the aforementioned accidents occurred without the use of a separation tank? Everyone is welcome to share their opinions on this topic.
We have a newly installed unit, and I heard that there is already a component inside the absorption tower that can achieve liquid separation. Active participation
Our unit was initially not equipped with a liquid separation tank, which led to repeated occurrences of increased pressure behind the incinerator and air leakage in the flue. Additionally, the incinerator went out several times due to liquid in the system.