Alcohol amine foaming in dry gas desulfurization operations
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Is there any good solution?
1. Control the concentration of the amine solution appropriately; it is best to consult the manufacturer； Too high a concentration can cause foaming ； 2. Add an amine solution purifier to remove thermally stable salts from the amine solution, thereby reducing the tendency to foam ； 3. Regularly add defoamer to the system ； 4. Control the temperature difference between the amine solution and the medium; the temperature of the amine solution should be 5-8°C lower than that of the medium. It is also advisable to consult the manufacturer to prevent foaming of the amine solution due to an excessive temperature difference ；
I would like to ask why the temperature of the amine solution should be lower than that of the medium
Regularly add defoamer to the system； Control the temperature difference between the amine solution and the medium
1 antifoaming agent, not too much, and not too varied； 2. Strengthen filtering ； 3. Replace the tower internals (anti-foaming tower internals – for example, DVST trays)
The Q&A on hydrogenation refining states that the amine liquid temperature should be 4-5 degrees higher than that of the feed gas, and we control it based on this criterion; the current situation is good
What catalyst do you use for the Klaus step, where is it sourced from, and what is its effectiveness?
What catalyst do you use for the Klaus step, where is it sourced from, and what is its effectiveness?
The feed purification was not done properly; it contains many small solid impurities
One more thing: Whether there is accumulation of heavy hydrocarbons in the desulfurization tower, surface tension also causes foaming. An oil skimming line is generally provided. The control system of the amine solution regeneration tower ensures that the bottom temperature does not exceed 130 degrees, thereby preventing the formation of thermally stable salts
If the quality of the amine solution deteriorates, install an amine purification unit or have the company carry out external purification to remove impurities and thermally stable salts