Global Technical Support Desmet Ballestra, Buenos Aires, Argentina
The minimum Residual Oil Content (ROC) in the meal come out of the extractor is considered like a clear benefit for a Crushing Plant. The more oil yield the better revenue for a Crusher. Anyhow still in some cases there is doubts regarding if low ROC is still beneficial due potential material (like FFA and Phospholipids) considering not desired in the extracted oil in the rest of the oil refinery process . In this presentation it is shown that there is not any economical limitation in to get the lowest ROC possible. But also is shown how to get a very low ROC. Although still many plants operate happy with 0,5 to 0,8% like normal residual oil content , some other crushers challenge those figures to get 0,3-0,4%. There are many parameters to be consider to have the best ROC out of the extractor. However there is a main aspect in the extraction process that has to be thoroughly consider since the very beginning. That is the “washing contact time”. Such parameter is critical to been able to optimize the overall Crushing Plant operation. Regardless of the extraction plant capacity the incremental investment in the extractor size to increase the washing time will pay back during a short period of operation.