Method and device for removing mixed water in high-boiling-point and high-viscosity oil

The invention belongs to the field of petrochemical engineering, and particularly relates to a method and device for removing mixed water in high-boiling-point and high-viscosity oil. A mixture of the high-boiling-point and high-viscosity oil and water is subjected to heat exchange through a one-stage or multistage heat exchanger, liquid water is converted into vaporous water by means of a boiling point difference, and the vaporous water enters a mixed oil dewatering tower; in the dewatering tower, by means of negative pressure caused by a centrifugal force field, the vaporous water dissolved in the oil is gathered in a negative pressure region in the center of the centrifugal force field, the separated vaporous water flows out of the top of the dewatering tower, is subjected to heat exchange through the one-stage or multistage heat exchanger to be converted into liquid water and then sent into subsequent equipment; oil separated through the dewatering tower flows out of the bottom of the dewatering tower and