Tubular oil-water separator and spiral flow generator therefor

A tubular oil-water separator and a spiral flow generator therefor. The spiral flow generator comprises flow guide slabs (31, 32, 33, 34) capable of being fixedly disposed along the peripheral direction of a tube (35), so that a spiral flow field with centre symmetry is generated when a fluid of mixed oil and water flows through the guide slabs (31, 32, 33, 34). The oil cores formed in the spiral flow field have the same movement direction as the water distributed near the wall of the tube (35), the oil and water being separated by means of the spiral flow principle. Since the fluid of mixed oil and water forms a spiral flow field with centre symmetry, the oil cores are distributed in the centre region of the tube, where no swing with large displacement would occur, so a good effect of oil-water separation is achieved.