Desain Sistem Sour Water Stripper dengan Satu Kolom Distilasi dan Injeksi Larutan Basa untuk Optimasi Penggunaan Lahan serta Biaya Operasional

Abstract

Sour Water Stripper (SWS) is system designed to handle sour water waste from refinery facilities. The different sour waste streams are collected for centralized processing where commonly two column in series are used to strip out the impurites that is dominated by hydrogen sulfide (H2S) and ammonia (NH3). However, two column design may not always be feasible so that a single column design is developed to counter this issue. Limitation of a single column design to provide two different condtion for optimum for removal of H2S and NH3 is then catered with the help of strong base chemical injection. The optimum chemical injection point and rate are are also studied to further optimize the operating cost. The results shows that for 5,1 ton/hour sour water with 900 ppm Amonia and 90 ppm H2S content can be treated with a single column design wtih strong base NaOH chemical injection (4 kg/hr injection rate and 40%wt concentration) at bottom part of the column. This design is able to reduce 50% of land usage and up to 80% reduction of chemical usage.