Reprocessing slop oil is always a headache issue for refiners, in our refinery, we blend recovery oil (one of slop oil from crude tank cleaning) into heavy crude slates (API<28), but suffering problem on desalter operation, higher emulsion layer led to electric field trip and desalter brines contain oil which can result wastewater treatment plant in upset, we would like you could share the operating experience on reprocessing slop oil with minimal impact on these facilities, thank you~
(1). What kind of pre-treating methodology did you apply on slop oil before reprocessing? Water separation or any filtration steps?
(2). Did you use chemicals for slop oil pretreatment?
(3). How did you reprocess slop oil? In-line injection into CDU uint or blend slop oil into crude tank?