Impeller assembly with asymmetric concave blades
AssigneeChemineer, Inc.
InventorAndries Bakker
Life of this patent
Estimating the term…
Abstract
An impeller assembly for agitating a fluid contained in a vessel and dispersing a gas introduced therein. The impeller assembly includes an impeller having a plurality of generally radially extending blades. Each of the blades includes diverging upper and lower sheet-like portions having generally radially extending leading edges. The upper and lower portions are joined to form a generally V-shaped cross-section with a trailing vertex. The width of the upper portion of each blade is greater than the width of the lower portion of the blade such that the upper portion leading edge extends forwardly of the lower portion leading edge, thus producing an upper portion overhang to capture and disperse rising gas bubbles. The impeller assembly further comprises a drive assembly for rotating the impeller assembly.
Claims83
An impeller assembly for agitating a fluid contained in a vessel and dispersing a gas introduced therein, the impeller assembly comprising:
- an impeller including a plurality of generally radially extending blades, each of said blades including diverging upper and lower sheet-like portions having generally radially extending leading edges, said upper and lower portions being joined to form a generally V-shaped cross-section with a trailing vertex, and wherein a width of said upper portion is greater than a width of said lower portion such that said upper portion leading edge extends forwardly of said lower portion leading edge, whereby a segment of said upper portion overhangs said lower portion;
- and
- a drive assembly for rotating said impeller such that said upper portion segment catches rising gas bubbles so that said impeller disperses said gas bubbles in a generally radial direction.
A mixing system for agitating a fluid and dispersing a gas introduced therein comprising:
- an impeller including a plurality of generally radially extending blades, each of said blades including diverging upper and lower sheet-like portions having generally radially extending leading edges, said upper and lower portions being joined to form a generally V-shaped cross-section with a trailing vertex, and wherein a width of said upper portion is greater than a width of said lower portion such that said upper portion leading edge extends forwardly of said lower portion leading edge whereby a segment of said upper portion overhangs said lower portion:
- and
- a drive assembly for rotating said impeller such that said upper portion segment catches rising gas bubbles so that said impeller disperses said gas bubbles in a generally radial direction:
- and
- a generally cylindrical vessel, said impeller being centrally radially arranged in said vessel.
An impeller for agitating a fluid contained in a vessel and dispersing a gas introduced therein, the impeller comprising a plurality of generally radially extending blades, each of said blades including upper and lower sheet-like portions having generally radially extending leading edges and joined to form a generally V-shaped cross-section with a trailing vertex, said upper and lower portions extending from said vertex such that a distance from a point on said upper portion to a plane of said disk member is substantially equal to a distance to said plane of a corresponding point on said lower portion such that said upper and lower portions diverge uniformly relative to said plane, and wherein a width of said upper portion is greater than a width of said lower portion such that said upper portion leading edge extends forwardly of said lower portion leading edge, whereby a segment of said upper portion overhangs said lower portion such that rotation of said impeller causes said upper portion segment to catch rising gas bubbles so that said impeller disperses said gas bubbles in a generally radial direction.
A method for agitating a fluid contained in a vessel and dispersing a gas introduced therein, the method comprising the steps of:
- selecting an impeller assembly including an impeller having a plurality of generally radially extending blades, each of said blades including diverging upper and lower sheet-like portions having generally radially extending leading edges and joined to form a generally V-shaped cross-section with a trailing vertex, and wherein a width of said upper portion is greater than a width of said lower portion such that said upper portion leading edge extends forwardly of said lower portion leading edge, whereby a segment of said upper portion overhangs said lower portion, and a drive assembly for rotating said impeller such that said upper portion segment catches rising gas bubbles so that said impeller disperses said gas bubbles in a generally radial direction;
- placing said impeller assembly in a vessel;
- filling said vessel with a fluid to be agitated;
- rotating said impeller assembly in said fluid;
- and
- introducing a gas to be dispersed into said vessel.
A method for agitating a fluid contained in a vessel and dispersing a gas introduced therein, the method comprising the steps of:
- selecting an impeller including a plurality of generally radially extending blades, each of said blades including upper and lower sheet-like portions having generally radially extending leading edges and joined to form a generally V-shaped cross-section with a trailing vertex, said upper and lower portions extending from said vertex such that a distance from a point on said upper portion to a plane of said disk member is substantially equal to a distance to said plane of a corresponding point on said lower portion such that said upper and lower portions diverge uniformly relative to said plane, and wherein a width of said upper portion is greater than a width of said lower portion such that said upper portion leading edge extends forwardly of said lower portion leading edge, whereby a segment of said upper portion overhangs said lower portion such that rotation of said impeller causes said upper portion segment to catch rising gas bubbles so that said impeller disperses said gas bubbles in a generally radial direction;
- placing said impeller in a vessel;
- causing said vessel to be filled with a fluid to be agitated;
- causing said impeller to rotate in a radial plane;
- and
- introducing a gas to be dispersed into said vessel.
An impeller assembly for agitating a fluid contained in a vessel and dispersing a gas introduced therein, the impeller assembly comprising:
- an impeller including a plurality of generally radially extending blades, each of said blades including diverging upper and lower sheet-like portions having generally radially extending leading edges, said upper and lower portions being joined to form a generally concave shaped cross-section, and wherein a width of said upper portion is greater than a width of said lower portion such that said upper portion leading edge extends forwardly of said lower portion leading edge, whereby a segment of said upper portion overhangs said lower portion;
- and
- a drive assembly for rotating said impeller such that said upper portion segment catches rising gas bubbles so that said impeller disperses said gas bubbles in a generally radial direction.
An impeller for agitating a fluid contained in a vessel and dispersing a gas introduced therein, the impeller comprising a plurality of generally radially extending blades, each of said blades including diverging upper and lower sheet-like portions having generally radially extending leading edges, said upper and lower portions being joined to form a generally concave shaped cross-section, and wherein a width of said upper portion is greater than a width of said lower portion such that said upper portion leading edge extends forwardly of said lower portion leading edge, whereby a segment of said upper portion overhangs said lower portion.
An impeller for agitating a fluid contained in a vessel and dispersing a gas introduced therein, the impeller comprising a plurality of generally radially extending blades, each of said blades including diverging upper and lower sheet-like portions having generally radially extending leading edges, said upper and lower portions being joined to form a generally concave cross-section, said upper and lower portions being shaped such that a distance from a point on said upper portion to a plane of said disk member is substantially equal to a distance to said plane of a corresponding point on said lower portion such that said upper and lower portions diverge uniformly relative to said plane, and wherein a width of said upper portion is greater than a width of said lower portion such that said upper portion leading edge extends forwardly of said lower portion leading edge, whereby a segment of said upper portion overhangs said lower portion such that rotation of said impeller causes said upper portion segment to catch rising gas bubbles so that said impeller disperses said gas bubbles in a generally radial direction.
A method for agitating a fluid contained in a vessel and dispersing a gas introduced therein, the method comprising the steps of:
- selecting an impeller assembly including an impeller having a plurality of generally radially extending blades, each of said blades including diverging upper and lower sheet-like portions having generally radially extending leading edges, said upper and lower portions being joined to form a generally concave shaped cross-section, and wherein a width of said upper portion is greater than a width of said lower portion such that said upper portion leading edge extends forwardly of said lower portion leading edge, whereby a segment of said upper portion overhangs said lower portion;
- and
- a drive assembly for rotating said impeller such that said upper portion segment catches rising gas bubbles so that said impeller disperses said gas bubbles in a generally radial direction;
- placing said impeller in a vessel;
- filling said vessel with a fluid to be agitated;
- rotating said impeller assembly in said fluid;
- introducing a gas to be dispersed into said vessel whereby said gas rises in said fluid and is contacted by said rotating impeller and is further broken up in said fluid.
Dependencies are inferred from the claim text.