The inlet filter is used to remove unwanted solid particles and liquid hydrocarbons from the sour gas stream before it goes through the sweetening loop.
Untreated natural gas containing carbon dioxide (C02) and hydrogen sulfide (H2S) flows into the bottom of the amine contactor where it contacts countercurrent flowing amine-water from the top of the tower. The amine solution sweetens the natural gas by absorbing the C02 and H2S upon contact. The sweet gas is removed overhead and the rich amine is drained and recirculated for regeneration.
Rich amine is routed to into the amine regenerator column where the application of heat is applied to reverse the absorption of H2S and C02. The lean amine is then re-circulated to the gas contactor while the concentrated acid is directed off-skid for further processing.
The amine reboiler is part of the amine regeneration process where the mixture is boiled to release unwanted gases.
Amine Charge Pumps
Amine Charge pumps are used to increase the pressure and circulate the amine solution to the amine contactor after it is regenerated.
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Enerflex provides the full suite of sour gas sweetening approaches, including amine and glycol-based systems. In consultation with the customer, we select the most cost-effective approach that also provides the right treatment performance for the particular makeup of the gas stream. Amine systems are typically used for CO2 concentrations over 2% and for H2S concentrations above 4 ppm.