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| Lemon slice squeezer |
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| Device for seeding bacterial cultures to systems to assist in biodegrading waste |
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| Aerobic biological dehalogenation reactor |
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| Denitrification system |
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| Process and apparatus for treating wastewater in a dynamic, bio sequenced manner |
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| Anaerobic migrating blanket reactor |
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| Method for treating high-concentrated organic wastewater using bio-maker |
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Centrifugal flotation separator
| Details |
Inventors: Jackson, George F.;
Assignee:
Primary Examiner: Adee; John
Assistant Examiner:
Attorney, Agent or Firm: Head, Johnson & Chafin
A multi-stage, recycling, centrifugal, flotation separator system, comprising a circular cylindrical vessel with vertical axis, having a horizontal tray positioned inside the vessel near the top, the tray having an axial opening. Means for introducing air under pressure into the vessel at the top thereof, and means for introducing contaminated liquid into the vessel through a tangential pipe, under pressure, at a level below the tray. Means to recycle air from the top of the vessel into the inlet line and to mix the recycled air with the contaminated liquid before entry into the vessel. Means to recycle liquid from the bottom of said vessel, through a tangential pipe into the vessel at a level below that of the contaminated liquid, and means to mix recycled air with the recycled liquid prior to entry into the vessel. |
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DETAILED DESCRIPTION It is a primary object of this invention to provide a multi-stage centrifugal flotation separator system, which overcomes the deficiencies of prior art systems, and provides a single apparatus, having multiple stages of separation, with a consequent greater efficiency and reduced cost.
These and other objects are realized and the limitations of the prior art are overcome in this invention by providing a closed circular cylindrical vessel, with a tray or baffle positioned inside the vessel near the top thereof, and having an axial opening and wall for the upward flow of froth and gas bubbles.
The contaminated liquid is introduced through a line tangential to the wall of the vessel so that the entering contaminated liquid with air mixture is circulated in a whirling motion around the inner wall of the vessel, providing considerable residence time, so that the air bubbles will have opportunity to move centripetally toward the center, and to rise through the opening in the baffle or tray, to the zone above the tray, where the foam is broken and gas is released to be recycled into the inlet liquid line.
Also, liquid from the bottom zone of the tank is recycled, by being pumped through an eductor which introduces recycled air or gas, and then through a mixing device in-line.
The recycled gas and liquid are then injected through at least one tangential opening.
Several tangential openings may be provided through the wall of the vessel like the initial liquid entry.
These recycle openings are spaced apart below the entry of the contaminated liquid.
The clean liquid is drawn from the bottom of the tank in a region close to the outer wall where it is the cleanest.
Annular plate rings may be fastened on the inside wall of the tank between the separate inlets of the initial contaminated liquid and the one or more entries of recycled gas and liquid.
These annular plates, or rings, prevent direct mixture of the entering flows, and therefore provide better opportunity for centripetal separation of the gas or air, and the liquid
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Liquid Purification 
