Management of LPG pool in a complex refinery

摘要

LPG pool management is becoming more important as the regulations on the product specifications tighten.If this pool is managed unwisely,it can lead to throughput reduction or even unit shutdown.At Tiipras'Izmit refinery,LPG is produced in three crude distillation units(CDUs),one fluid catalytic cracking unit(FCCU),one delayed coking unit(DCU),two Platformers,one diesel hydrotreating unit(DHTU)and two hydrocracking units(HCUs).Some of these LPG products are sent directly to storage tanks,while others require posttreatment.Three LPG treaters help meet sulfur-based specifications,and a C3/C4 splitter is followed by a selective hydrogenation unit(SHU)to meet butadiene specifications.Additionally,an LPG recovery compressor with a chiller and an LPG evaporator is used,according to production planning requirements.