Causes and countermeasures for water content in catalytic dry gas and coking dry gas
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Will liquid presence in catalytic dry gas and coking dry gas result in water contamination? Liquid was detected after the dry gas reached the hydrogen production unit, and most of it was water. Currently, the temperature of the catalytic dry gas is 35°C; the liquid level at the bottom of the desulfurization tower is 50% with a temperature of 50°C. The temperature of the lean liquid is 44°C, and the liquid level in the outlet buffer tank is very low, practically none at all； The temperature of the coking dry gas is 40°C. The liquid level at the bottom of the desulfurization tower is 40%, with a temperature of 45°C. The temperature of the lean liquid is 42°C, and the liquid level in the outlet buffer tank is also very low. I would like to ask the experts what could be causing this?
Dry gas with water? I haven’t encountered it. I’ve encountered oil in dry gas before. The reasons include excessively high or highly fluctuating liquid levels in the reabsorption tower, large fluctuations in the pressure of the absorption system, the influence of the amount and temperature of the absorbent (and supplementary absorbent) as well as that of the lean absorbent stream, excessively high liquid levels in the dry gas liquid separation tank, and large fluctuations in the volume of dry gas, among others. The presence of water in the dry gas occurs unless there is severe water content in the crude gasoline or stabilized gas; this issue can be reflected in the temperatures at the bottom of the stripping tower and the stabilization tower. If water is present, the temperature at the bottom of the tower will fluctuate significantly, affecting normal production operations. Hope this helps, thank you!
Is it caused by pressure changes? There are amine liquid recovers at the dry gas outlet, so it should be equipped with amine liquid as well
Is there a leak in the rich-lean liquid heat exchanger? There should be no water under normal circumstances.
Is there a leak in the rich-lean liquid heat exchanger? There should be no water under normal circumstances.
Is a bottom temperature of 50°C a bit high?
Was the water vapor from the lean liquid removed?
Is it possible that the liquid level is incorrect, causing water to be carried along? Generally, once the water is completely removed from the separation tank, there should be no problem