| 摘要 |
<p>The invention comprises a method and apparatus for treating oil, water and sand mixtures to separate the components. The apparatus comprises an arrangement of four sequential treatment cells, each comprising an agitation chamber including a rotating paddle and agitation baffles and a settlement chamber. The mixture is agitated in the first agitation chamber a nd transferred to the first settlement chamber where the sand settles to the bottom. Means are provided for transferring sand from each settlement chamber to the agitation chamber of t he next cell. The transfer means may comprise pressurized water jets which dislodge the sand allowing it to fall through an opening in the bottom of the settlement chamber and into the next agitation chamber. The agitation and settlement steps are repeated in each cell. There are four transfer tanks associated with each cell where the oil and water drawn from the settlement chamber are separated. The treated sand is washed with fresh water in the fourth cell an d collected and dried by a basket centrifuge. Means are also provided to recirculate the water, which may include an added surfactant and/or a demulsifier, from each transfer tank backward through the treatment cells.</p> |
