Patent ID: 7122118
Filing Date: 2006-10-17
Classification: B01D

Abstract:
1. A treatment vessel for separating contaminants from a base liquid treated therein, the treatment vessel comprising: a first cylindrical portion; a frusto-conical portion adjacent a lower end of the first cylindrical portion; a second cylindrical portion adjacent a lower end of the frusto-conical portion; a conical portion adjacent a lower end of the second cylindrical portion, the conical portion having a bottom outlet arranged to discharge heavy contaminants from the treatment vessel; a clarified liquid source derived from the treatment vessel or another treatment vessel in a treatment system; and a plurality of first clarified liquid inlets disposed at a side of the treatment vessel to reintroduce clarified liquid into the treatment vessel from the clarified liquid source at the frusto-conical portion thereof; such that, in use, the clarified liquid is reintroduced in a manner so as to cause a downward circular flow to scour out the frusto-conical portion and the conical portion and to assist in removing heavy contaminants that accumulate adjacent the bottom outlet of the treatment vessel; wherein the treatment vessel is further provided with a plurality of second clarified liquid inlets disposed at a side of the treatment vessel to reintroduce clarified liquid into the treatment vessel from the clarified liquid source at the second cylindrical portion thereof; such that, in use, the clarified liquid is reintroduced in a manner so as to cause a downward flow to scour out the conical portion and to assist in removing heavy contaminants that accumulate adjacent the bottom outlet of the treatment vessel.