| 摘要 |
A settling tank apparatus for removing solids from a solids-containing fluid, having a vertical cylindrical portion and a bottom portion having a downwardly-extending substantially torispherical, ellipsoidal, hemispherical or frusto-conical shaped curved interior surface. A jetting fluid source is provided in a lower region of the tank, preferably in the bottom of the tank, which directs a jetting fluid in a tangential direction in a plane substantially perpendicular to said longitudinal axis of the tank, to enhance rotational swirling of a created vortex in the bottom of tank when solids are drained therefrom, to thereby reduce deposition and build up of settled solids on the curved interior of the bottom of the tank. A system incorporating a plurality of tanks of such design and a method for removing solids from a solids-containing fluid using a tank of such design, is further disclosed. |
| 主权项 |
1. A settling tank apparatus for separating solids from a solids-containing fluid, comprising:
(a) a substantially cylindrical settling tank having a substantially vertical longitudinal axis, further having:
(i) an upper, substantially cylindrical portion having a cylindrical interior surface;(ii) a bottom, located below said cylindrical portion, having a downwardly-extending curved interior surface substantially free of discontinuities which would otherwise obstruct or disrupt rotation of fluid within said bottom about said longitudinal axis in a plane perpendicular to said longitudinal axis;(ii) a fluid inlet, in fluid communication with an interior of said tank, for directing said solids-containing fluid into said tank;(iii) a solids outlet, disposed proximate a lowermost extremity of said bottom and substantially co-axial with said longitudinal axis, for allowing draining of solids from said bottom of said tank;(iv) a cleaned fluid outlet, disposed in said cylindrical upper portion of said tank above said fluid inlet and in fluid communication with said interior of said tank in said upper cylindrical portion, for removing fluids having reduced quantities of solids entrained therein from said tank; and (b) a jetting fluid source, situated in a lower region of said tank in or proximate said bottom and above said solids outlet, for directing a jetting fluid into said tank in a plane substantially perpendicular to said longitudinal axis and in a direction substantially tangential to said cylindrical interior surface or said curved interior surface, to permit introduction or augmentation of rotational swirl of fluid in said bottom in said plane and about said axis. |
