Differential injector
First Claim
Patent Images
1. A differential injector for mixing in a flow device comprising:
- a substantially cylindrical fluid flow body having a venturi disposed therein and first and second wall portions, said venturi being disposed and aligned concentrically with said substantially cylindrical fluid flow body, for providing primary fluid flow through said venturi, the venturi having an inlet port, a throat portion and an outlet port;
a secondary fluid port for supplying a secondary fluid for mixing with the primary fluid, said secondary fluid port being disposed within said first wall portion of the substantially cylindrical fluid flow body, for delivering the secondary fluid to a plurality of flow channels, said plurality of flow channels being disposed within said second wall portion of the substantially cylindrical fluid flow body, said plurality of flow channels supplying the secondary fluid at a point which is downstream of the throat portion, said plurality of flow channels being aligned and including first and second groups of flow channels, the first group of flow channels being disposed between the second group of flow channels and an interior surface segment of the second wall portion of said substantially cylindrical fluid flow body, the first and second groups of flow channels terminating at respective first and second outlet ports within the substantially cylindrical fluid flow body, the first and second outlet ports having a segment of the interior surface segment of the second wall portion disposed therebetween, the interior surface segment of the second wall portion including at least one surface irregularity to increase turbulence and the production of torroidal vortices to improve mixing of the primary fluid and the secondary fluid.
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Abstract
A differential injector for fluid mixing having a primary fluid inlet, a throat section and a diverging discharge outlet. A secondary fluid is pulled into the discharge outlet, through annular recessed grooves, by suction action produced by the primary fluid of the venturi. A plurality of channels feed the secondary fluid into the recessed annular grooves. The channels may be connected to a secondary fluid injection port via an injection annulus.
127 Citations
57 Claims
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1. A differential injector for mixing in a flow device comprising:
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a substantially cylindrical fluid flow body having a venturi disposed therein and first and second wall portions, said venturi being disposed and aligned concentrically with said substantially cylindrical fluid flow body, for providing primary fluid flow through said venturi, the venturi having an inlet port, a throat portion and an outlet port;
a secondary fluid port for supplying a secondary fluid for mixing with the primary fluid, said secondary fluid port being disposed within said first wall portion of the substantially cylindrical fluid flow body, for delivering the secondary fluid to a plurality of flow channels, said plurality of flow channels being disposed within said second wall portion of the substantially cylindrical fluid flow body, said plurality of flow channels supplying the secondary fluid at a point which is downstream of the throat portion, said plurality of flow channels being aligned and including first and second groups of flow channels, the first group of flow channels being disposed between the second group of flow channels and an interior surface segment of the second wall portion of said substantially cylindrical fluid flow body, the first and second groups of flow channels terminating at respective first and second outlet ports within the substantially cylindrical fluid flow body, the first and second outlet ports having a segment of the interior surface segment of the second wall portion disposed therebetween, the interior surface segment of the second wall portion including at least one surface irregularity to increase turbulence and the production of torroidal vortices to improve mixing of the primary fluid and the secondary fluid. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A mixing device for mixing two fluids, comprising:
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a first section having an inner passage defining a primary fluid flow path;
a second section having an inner passage of larger cross-sectional area than the inner passage of said first section, at least a portion of said second section being downstream of a downstream end of said first section;
a third section connecting the first and second sections, said third section having a connecting wall connecting the first and second sections;
a secondary fluid injection area in the vicinity of said downstream end of said first section; and
a plurality of secondary fluid injection channels formed in at least a portion of said connecting wall, said secondary fluid injection channels being integrally formed in said connecting wall and exiting at an inner surface of said connecting wall such that said secondary fluid injection area is adjacent an inner surface of said connecting wall, wherein said plurality of secondary fluid injection channels include first and second groups of flow channels, the first group of flow channels being disposed between the second group of flow channels and the interior surface of said connecting wall, the first and second groups of flow channels terminating at respective first and second outlet ports, the first and second outlet ports having a segment of connecting wall disposed therebetween, the segment of connecting wall including at least one surface irregularity to increase turbulence and the production of torroidal vortices to improve mixing of the primary fluid and the secondary fluid. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A differential injector for mixing in a flow device comprising:
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a tubular fluid flow body having walls defining a venturi which is disposed in said tubular fluid flow body, and providing primary fluid flow through said venturi, said tubular fluid flow body having wall portions defining an inlet port of said venturi for receiving the primary fluid flow and an outlet port of said venturi, the venturi having a throat portion; and
a secondary fluid port for supplying at least one secondary fluid for mixing with the primary fluid, said secondary fluid port delivering the secondary fluid to secondary flow channels, said secondary flow channels being disposed within a wall portion of said tubular fluid flow body, and said secondary flow channels opening in the vicinity of said outlet port of said venturi for providing secondary fluid into the primary fluid flow, said secondary flow channels supply the secondary fluid at a point which is downstream of the throat portion, and including first and second groups of flow channels, the first group of flow channels being disposed between the second group of flow channels and an interior surface of the tubular fluid flow body, the first and second groups of flow channels terminating at respective first and second outlet ports within the tubular fluid flow body, the first and second outlet ports having a segment of the interior surface of the tubular fluid flow body disposed therebetween, the segment of the interior surface including at least one surface irregularity to increase turbulence and the production of torroidal vortices to improve mixing of the primary fluid and the secondary fluid. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38)
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39. A differential injector for creating a vacuum condition in a chamber, comprising:
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a tubular fluid flow body having walls defining a venturi which is disposed in said tubular fluid flow body, and providing primary fluid flow through said venturi, said tubular fluid flow body having wall portions defining an inlet port of said venturi for receiving the primary fluid flow, a throat portion and an outlet port of said venturi;
a secondary fluid port in communication with the primary fluid flowing through said venturi, said secondary fluid port delivering secondary fluid to a secondary flow channels, said secondary flow channels being disposed within a wall portion of said tubular fluid flow body, and said secondary flow channels providing secondary fluid by injection into the outlet port area of said venturi downstream of the throat portion of said venturi; and
a housing surrounding said secondary fluid port and at least partly defining said chamber in which at least a partial vacuum is formed responsive to delivering of secondary fluid from said housing to said outlet port area via said channels, wherein said secondary flow channels include first and second groups of flow channels, the first group of flow channels being disposed between the second group of flow channels and an interior surface of the tubular fluid flow body, the first and second groups of flow channels terminating at respective first and second outlet ports within the tubular fluid flow body, the first and second outlet ports having a segment of the interior surface of the tubular fluid flow body disposed therebetween, the segment of the interior surface including at least one surface irregularity to increase turbulence and the production of torroidal vortices to improve mixing of the primary fluid and the secondary fluid. - View Dependent Claims (40, 41, 42, 43, 44, 45, 46, 47)
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48. A device for creating a vacuum condition in a chamber, comprising:
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a first section having an inner passage defining a primary fluid flow path;
a second section having an inner passage of larger cross-sectional area than the inner passage of said first section, at least a portion of said second section being downstream of a downstream end of said first section;
a third section connected between the first and second sections, said third section having a connecting wall connecting the first and second sections;
a secondary fluid injection area in the vicinity of said downstream end of said first section;
a plurality of secondary fluid injection channels formed in at least a portion of said connecting wall, said secondary fluid injection channels being integrally formed in said connecting wall and exiting at an inner surface of said connecting wall such that said secondary fluid injection area is adjacent an inner surface of said connecting wall; and
a housing surrounding at least a portion of at least one of said second and third sections and through which said secondary fluid passes to said injection channels responsive to the flow of primary fluid in said primary fluid flow path, said housing at least partly defining said chamber and in which at least a partial vacuum is formed responsive to delivering of secondary fluid from said housing to said injection area via said channels, wherein said plurality of secondary fluid injection channels include first and second groups of flow channels, the first group of flow channels being disposed between the second group of flow channels and the interior surface of said connecting wall, the first and second groups of flow channels terminating at respective first and second outlet ports, the first and second outlet ports having a segment of the connecting wall disposed therebetween, the segment of the connecting wall including at least one surface irregularity to increase turbulence and the production of torroidal vortices to improve mixing of the primary fluid and the secondary fluid. - View Dependent Claims (49, 50, 51, 52, 53, 54, 55, 56, 57)
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Specification