Total sulfur in liquefied gas
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My unit is equipped with 500,000 units of catalyst, and the operating parameters in the upstream section don’t change much. The feedstock remains quite heavy; the temperature at the bottom of the oil slurry tower is high, reaching up to 385 degrees. In the absorption tower, the liquid level isn’t controlled. For unit 11, I adjusted the temperature returning to the tower to 285 degrees, and the temperature at the bottom of the tower to around 365 degrees. Additionally, the pressure in the absorption tower was changed from 1.07 to 1.08 MP. The liquid level in the absorption tower was set at 18. The total sulfur content in the liquefied gas is starting to increase; today it reached 2850. What could be the reason for this? Previously, it was possible to clean the tower using hot water, but now the factory prohibits this practice. Are there any other solutions? Thank you!!!
First, conduct an analysis of hydrogen sulfide and other sulfur compounds such as thiolates to determine which type of sulfur is responsible for the high total sulfur level. Then perform downstream operations based on the situation.