How can water, accounting for about 70% of the oil used to clean oil tankers, be removed through atmospheric and vacuum distillation?
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How can the water content of around 70% in the oil used for cleaning oil tankers be removed through atmospheric and vacuum distillation? There is a batch of oil with a 70% water content, and it is not possible to separate the oil from the water even in storage tanks; what processes need to be modified in order to remove the water using atmospheric and vacuum distillation?
Electrodesalination cannot remove water; such a high water content will cause the system to trip. It is recommended to increase the temperature of the tanks in the tank farm, and adding some demulsifier should also help to increase the temperature and thus remove water.
Several hydrocyclones can be used for this purpose. The oil content in the wastewater discharged from vacuum and atmospheric pressure electrodialysis tanks is generally above 150 ppm, while the oil content in wastewater sent to sewage treatment plants is required to be no more than 50 ppm – which is even stricter than the requirements for your oil-water mixture. However, these requirements can usually be met by using hydrocyclones and oil removal tanks. In your case, it’s sufficient to simply use several hydrocyclones