MEMBRANE-ABSORPTION HYBRID PRETREATMENT APPARATUS FOR LNG-FPSO

摘要

An acidic gas processing apparatus suitable for a restricted available space of a floating marine LNG plant is disclosed. The apparatus of the present invention comprises: a separation film array which includes a front film for producing first penetration gas stream and first residue gas stream from natural gas flow that has flowed in, and two rear films for introducing the first penetration gas stream and the first residue gas stream of the front film; an absorption tower which includes an amine-based solution for absorbing acidic gas by introducing gas stream flowed through the separation film array; and a regeneration tower for regenerating the amine-based solution from an amine-based absorbent. The present invention: is able to reduce energy consumption by more than three times, as compared to an amine absorbing process for generally treating acidic gas, by being used as a pretreatment process for acidic gas among marine natural gas for LNG-FPSO; is able to be operated according to the changes in natural gas composition of various marine gas; minimizes the performance degradation of a pretreatment process according to the flowage of a hull; and is suitable for being applied to a restricted space of the LNG-FPSO.