Ucarsol solvent is formulated to operate at a 15 +/- 5 % wt. Operating above this concentration range can lead to viscosity related problems such as in efficient acid gas absorption, hydrocarbon entraintment, poor heat transfer efficiency and higher pumping requirement. Operating below this will result in increase circulation rate and higher reboiler duty requirement. The system also includes regeneration of Ucarsol solvent to strip H2S gas and H2S tail gas is further treated in the thermal oxidizer prior disposal.
Amine Contactor system.
The rich amine solvent from contactor flows to amine flash drum through level control valve. The gas from the separator flows into the drum prior entering the amine contactor. The inlet KO drum is designed as a gas filter separator that incorporate filtration to a nominal level of 10 micron to ensure that no contaminant are carried over to amine solution.
The feed gas is then entering the amine contactor at the bottom side and couter currently contacted with lean amine (ucarsol) fed at the top of the contactor. The mass and energy transfer at trays inside the column make the sweet gas leaves the amine contactor with the desired concentration of H2S. The rich amine solution leaves the contactor at the bottom.
The saturated treated gas from amine contactor overhead flows to the Amine overhead KO drum for protection againts abnormal carryover of amine solvent into the gas stream due to foaming or mechanical malfunction of the Amine Contactor. All Amine collected in the drum returns to Amine Flash Drum by level control valve.
All the buttom inside the contactor there is a collection box to collect some skimmed oil to closed drain header manually.
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