How to adjust operations when crude oil contains water
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Some of the crude oil used in blending is purchased from sources with a high water content; how can operations be adjusted to prevent water from entering Tank 2 for electrical desalination?
Dehydration upstream of hydrogenation, settling time, dehydration in the raw material buffer tank.
Regardless of the amount of water present in the crude oil, units that use electrical dehydration for atmospheric and vacuum distillation need to pay attention to several points: first, the presence of water is not a problem； Second, the water volume should not be too large ； Third, pay attention to adjusting the heat exchange, as high water content leads to a low temperature in the electrodialysis process, which affects the temperature requirements for electrodialysis (120–140) ； IV. Pay attention to adjusting the oil-water level in the desalination tank properly, to prevent abnormal water leakage or oil leakage ； VI. When electrodeposition is carried out in two or three stages, water is generally reinjected from the subsequent stage back to the preceding one. If the raw material has a high water content, it is appropriate to reduce the flow rate of the washing water accordingly, based on the values indicated by the oil-water interface levels. :):)
Settling in the tank area, along with high water content, has a significant impact on the electrodialysis desalination unit; in mild cases this leads to oil being carried over in the dehydrated product, while in severe cases it results in high current levels in the unit, preventing proper operation, as well as water being present in the product after desalination.