Circulating hydrogen with liquid entrainment
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I would like to ask those of you who have cyclic hydrogen desulfurization systems: how do you handle the situation where liquid is present in the cyclic hydrogen in your systems? Is there a more thorough solution?
Drain liquid from the liquid separation tank at the inlet of the recycle hydrogen compressor.
Increase liquid cutting to reduce fluctuations in the level of the rich liquid; keep the temperature of the rich liquid at around 45 degrees, and the temperature of the lean liquid also at 45 degrees – it should not be too high. The amount of lean liquid should not be excessive, and the valve connected to the desulfurization tower should be set to a slightly open position
Our high-performance operations remain stable; the temperature of the amine-rich liquid entering the tower is around 50 degrees. This relatively high temperature leads to frequent liquid carryover. The effects of the operations carried out on the side lines of the desulfurization tower are not very significant, and oil skimming attempts also proved ineffective. Finally, replacing the amine liquid inside the tower yielded good results
In severe cases, the amine solution does not pass through the desulfurization tower at all, but goes directly from the liquid removal tank in front of the circulator
Our desulfurization unit has a liquid separation tank in front of the desulfurization tower, and another liquid separation tank at the inlet of the compressor behind it. If there is liquid in the latter tank, it indicates an imbalance between gas and liquid in the desulfurization tower. Is your desulfurization tower equipped with packing or a plate tower? It might be caused by dirty lean liquid; improving the purification of the amine solution will solve it
Strengthen liquid removal at the inlet~~~~; we go to the liquid separation tank for dry gas sealing, where liquid removal is carried out every three hours~~~~
We also have a liquid separation tank in front of the desulfurization tower, as well as another liquid separation tank at the compressor inlet. It’s a plate tower for desulfurization – how is the gas-liquid equilibrium calculated? What is the standard for what constitutes dirty amine solution? What indicators can be used for evaluation
Would it be better to use a packed tower?