Pneumatic Patents (Class 209/170)
  • Patent number: 10870078
    Abstract: An air cleaner according to an exemplary embodiment of the present invention includes a water tank in which water is contained, a rotating shaft which is mounted in the water tank and rotates, and a rotating body which is coupled to the rotating shaft to rotate in a longitudinal direction of the rotating shaft as a rotational axis and formed with a plurality of rotating blades capable of collecting air, in which the rotating shaft is obliquely mounted to form a predetermined angle with a water surface formed by the water contained in the water tank.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: December 22, 2020
    Assignee: MIRO CO. LTD.
    Inventors: Dong Jin Seo, Yong Ju Oh, Min Seok Kim, Jeong Won Lee
  • Patent number: 10828648
    Abstract: THIS invention relates to froth flotation, and more specifically to a froth flotation cell and an internal sand removal arrangement for the froth flotation cell. The froth flotation cell included a tank having an operatively lower zone, an intermediate zone and an operatively upper zone, and a central dispersing chamber disposed in the intermediate zone of the tank. A slurry inlet is located in the operatively lower zone of the tank, and a slurry outlet conduit extends from the operatively upper zone of the tank towards a slurry outlet. The froth flotation cell is characterised in that the operatively lower zone is also selectively in flow communication with the slurry outlet of the tank, in order for slurry located in the operatively lower zone of the tank selectively to be displaceable into the slurry outlet.
    Type: Grant
    Filed: February 11, 2016
    Date of Patent: November 10, 2020
    Inventor: Johannes Gideon Andries Swanepoel
  • Patent number: 10792628
    Abstract: A device for enhanced generation of microbubbles in a more efficient manner is provided. The device is smaller, quieter, and more energy-efficient than prior microbubble-generating devices, and is suitable for use with liquid dispensing devices such as hydrotherapy jets, shower heads, liquid nozzles, and bathtub faucets. Methods of use of the enhanced microbubble system are also disclosed.
    Type: Grant
    Filed: October 9, 2019
    Date of Patent: October 6, 2020
    Assignee: Hydro Massage Products LLC
    Inventor: Ron Stevens
  • Patent number: 10384150
    Abstract: Certain aspects of the present disclosure relate to a fluid treatment reactor. Separate input ports for influent and recycled effluent serve to eliminate the need for pH adjustment or carbonate stripping of the influent and recycled effluent flows. The fluid treatment reactor may include a media, a vessel including a top portion and a bottom portion, a solid discharge port, an effluent discharge port, an influent input in fluid communication with the media, and a recycled effluent port in fluid communication with the media.
    Type: Grant
    Filed: April 6, 2017
    Date of Patent: August 20, 2019
    Assignee: ECOLAB USA INC.
    Inventor: Kevin Patrick O'Leary
  • Patent number: 10377652
    Abstract: A method is provided for recovering fractions from an animal rendering process wastewater stream, wherein the fractions include one or more of fat, oil, grease, and protein derived from an animal source. To recover the fractions, the wastewater stream is processed to separate insoluble or immiscible contaminants as collected skimmings, and treating the collected skimmings with an effective amount of a nonionic demulsifying surfactant.
    Type: Grant
    Filed: December 4, 2015
    Date of Patent: August 13, 2019
    Assignee: Fremont Industries, Inc.
    Inventors: Kyle Hunter Hanson, Michael Todd Oldsberg
  • Patent number: 10183878
    Abstract: The present invention discloses a device for Fenton fluidized-bed process and a method applying the device for wastewater treatment. It belongs to the wastewater treatment field. The device comprises an adjusting tank, a lift pump and a main reaction column.
    Type: Grant
    Filed: October 16, 2014
    Date of Patent: January 22, 2019
    Assignees: Nanjing University, Nanjing University Yancheng Environmental Protection Technology and Engineering Research Institute
    Inventors: Aimin Li, Ke Shen, Bicun Jiang, Chendong Shuang, Fuqiang Liu
  • Patent number: 9919276
    Abstract: The present invention provides a system for enriching a flowing liquid with a dissolved gas inside a conduit. The system comprises two or more capillaries, each capillary delivering a stream of a gas-enriched liquid to the flowing liquid. The first ends of the capillaries are positioned to form an intersecting angle with respect to the effluent streams such that these streams of gas-enriched liquid collide with each other upon exit from the first ends of the capillaries, effecting localized convective mixing within the larger liquid conduit before these gas-enriched streams are able to come into close contact with the boundary surfaces of the conduit, whereby the gas-enriched liquid mixes with the flowing liquid to form a gas-enriched flowing liquid. In the preferred embodiment, no observable bubbles are formed in the gas-enriched flowing liquid. Methods of making and using such system are also provided.
    Type: Grant
    Filed: April 23, 2013
    Date of Patent: March 20, 2018
    Assignee: TherOx, Inc.
    Inventors: Stephen E. Myrick, Jeffrey L. Creech
  • Patent number: 9908067
    Abstract: A waste water treatment system including primary settling tanks. The waste water treatment system includes a trough which causes waste water to flow in a direction parallel to a bar screen placed in the trough with the base of the bar screen being at a lower elevation than the trough weir. Each primary settling tank has a fine screen box for screening waste water. Each primary settling tank has a scum and floatables trough for collecting scum and floatables which pass through or over a top edge of the bar screen. The scum and floatables troughs are in fluid communication with one another. When a scum valve is open, scum, floatables and waste water in the scum and floatables trough flow from the scum and floatables trough of the first primary setting tank to the scum and floatables trough of the second primary settling tank and into a collection container.
    Type: Grant
    Filed: December 27, 2013
    Date of Patent: March 6, 2018
    Assignee: ClearCove Systems, Inc.
    Inventor: Terry Wright
  • Patent number: 9839919
    Abstract: Apparatus is providing featuring a synthetic bead having a solid-phase body with a surface, and being configured with a predetermined electric charge so as to respond to a corresponding predetermined electric field; and a plurality of molecules attached to at least part of the surface, the molecules comprising a functional group selected for attracting and attaching one or more mineral particles of interest to the molecules. Some combination of the solid-phase body or the surface may be configured from a polymer. The polymer may be polyethylenimine. The polyethylenimine may be engineered or configured to be highly charged so as to be used to collect the mineral particles of interest and then manipulated through and by the corresponding predetermined electric field.
    Type: Grant
    Filed: May 22, 2013
    Date of Patent: December 12, 2017
    Assignee: CIDRA CORPORATE SERVICES INC.
    Inventor: Michael A. Davis
  • Patent number: 9725334
    Abstract: The invention relates to a rapid flotation device, in particular using dissolved air, for treating water laden with suspended matter (MES). The device comprises a mixing area (B) separated from a flotation area (C) by a wall (n) above which the liquid to be treated passes from the mixing area. The bottom portion of the flotation area comprises: a perforated floor (1) located above an apron (R), a floated-water discharge being provided under the floor and leading to an outlet system (3); and at least two separate channels (2) which are oriented in the direction of flow of the water and are provided under the floor (1), and under optional structures (w) extending from the floor, to a point upstream of the outlet system (3). The downstream end (2.1) of the channels is open and located above the floor level, and a discharge means (V) is provided, for each channel, at the end of the downstream bottom portion of said channel.
    Type: Grant
    Filed: May 3, 2012
    Date of Patent: August 8, 2017
    Assignee: DEGREMONT
    Inventors: Francois Le Quesne, Patrick Vion
  • Patent number: 9284199
    Abstract: A flotation unit for purifying water, comprising at least a separator tank, a supply duct to a tank inlet, outlets for gas, oil and water from the tank, and a gas injector located in the supply duct, said gas injector comprising a venturi section having an inner diameter and a cross-sectional area smaller than a cross-sectional area of the supply duct, an ejector arranged in the venturi section and having an outer side facing an inside surface of the venturi section, an inner side facing a longitudinal center axis of the venturi section, a downstream side, and a upstream side, the ejector comprising an annular gas distribution chamber and a plurality of gas outlets arranged along a side of the ejector and connected to the gas distribution chamber, and a gas inlet for supplying gas to the gas distribution chamber, wherein the ejector has an outer diameter which is smaller than the inner diameter of the venturi section.
    Type: Grant
    Filed: April 8, 2011
    Date of Patent: March 15, 2016
    Assignee: Schlumberger Norge AS
    Inventors: Karsten Rabe, Lars Hardli
  • Patent number: 9266121
    Abstract: A rotor for flotation machines or flotation cells of flotation machines includes blades that are configured to provide improved bubble flow and bubble generation performance while also reducing the power requirements for rotating the rotor to generate bubble flow within a tank of a flotation cell used to generate froth. Embodiments of the rotor may also be configured to be smaller than conventional rotor designs, which may help reduce the costs of manufacturing the rotor or flotation machines using such embodiments of the rotor.
    Type: Grant
    Filed: May 8, 2013
    Date of Patent: February 23, 2016
    Assignee: Virginia Tech Intellectual Properties, Inc.
    Inventors: Roe-Hoan Yoon, Gerald Luttrell, Saad Ragab, Demetri Telionis, Abdel-Halim Said, Sanja Miskovic, Aaron Noble, Yihong Yang
  • Publication number: 20150108045
    Abstract: A separation system is presented that partitions a slurry containing a plurality of particles that are influenced by a fluidization flow (which comprises teeter water and gas bubbles) and a fluidized bed. The separation system comprises a separation tank, a slurry feed distributor, a fluidization flow manifold and a gas introduction system. All of these components are arranged to create the fluidized bed in the separation tank by introducing the slurry through the slurry feed distributor and allowing the slurry to interact with the fluidization flow that enters the separation tank from the fluidization flow manifold. The gas introduction system is configured to optimize the gas bubble size distribution in the fluidization flow. The gas introduction system comprises a gas introduction conduit and a bypass conduit. The gas introduction system can be adjusted by modulating the flow of teeter water through the gas introduction conduit.
    Type: Application
    Filed: October 17, 2013
    Publication date: April 23, 2015
    Applicant: Eriez Manufacturing Co.,
    Inventors: Michael J. Mankosa, Jaisen N. Kohmuench, Eric S. Yan
  • Patent number: 8960443
    Abstract: A flotation separation system is provided for partitioning a slurry that includes a hydrophobic species which can adhere to gas bubbles formed in the slurry. The flotation separation system comprises a flotation separation cell that includes a sparger unit and a separation tank. The sparger unit has a slurry inlet for receiving slurry and a gas inlet to receive gas with at least enough pressure to allow bubbles to form in the slurry within the sparger unit. The sparger unit includes a sparging mechanism constructed to disperse gas bubbles within the slurry. The sparging mechanism sparges the gas bubbles to form a bubble dispersion so as to cause adhesion of the hydrophobic species to the gas bubbles substantially within the sparger unit while causing a pressure drop of about 10 psig or less across the sparging mechanism. The sparger unit includes a slurry outlet to discharge the slurry and the bubble dispersion into the separation tank.
    Type: Grant
    Filed: April 11, 2008
    Date of Patent: February 24, 2015
    Assignee: Eriez Manufacturing Co.
    Inventors: Michael J. Mankosa, Jaisen Kohmuench, Eric S. Yan, Gerald H. Luttrell
  • Patent number: 8893892
    Abstract: An apparatus and a method for removing unburned carbon from fly ash capable of suppressing facility cost and stably conducting performance adjustment depending on property of the fly ash. The method comprises the steps of: adding water to fly ash to produce slurry; adding collector to the slurry, feeding the slurry and the collector to a static-type mixer 4, a venturi pipe 24 or the like to add shearing force to them; adding frother to them to generate air bubbles; and adhering unburned carbon of the fly ash to the air bubbles to raise the unburned carbon. The frother and air can be fed to the static-type mixer or the like together with the slurry and the collector. Depending on the change in property of the fly ash, the number of the static-type mixers or the like used in series can be increased or decreased, and depending on required capacity, the number of the static-type mixers or the like used in parallel may be increased or decreased.
    Type: Grant
    Filed: November 28, 2006
    Date of Patent: November 25, 2014
    Assignee: Taiheiyo Cement Corporation
    Inventors: Shinichiro Saito, Kazuo Abe, Kazuyoshi Matsuo
  • Patent number: 8794446
    Abstract: A sparging device for a flotation cell may include a central gas tube with a central gas orifice which is adjoined by at least two connecting tubes each having a connecting gas orifice, the connecting tubes being aligned at a right angle ss to a longitudinal axis LZ of the central gas tube, the central gas orifice being connected to the connecting gas orifices, and each connecting tube being connected to at least one gas injection unit at its end remote from the central gas tube. A flotation cell with such a sparging device and a flotation method are also disclosed.
    Type: Grant
    Filed: April 19, 2011
    Date of Patent: August 5, 2014
    Assignee: Siemens Aktiengesellschaft
    Inventors: Stefan Blendinger, Robert Fleck, Gerold Franke, Lilla Grossmann, Werner Hartmann, Wolfgang Krieglstein
  • Publication number: 20140209517
    Abstract: A dispersion nozzle for dispersing a liquid with a gas, has a gas feed nozzle and a tubular mixing arrangement which has an inlet zone for the gas and the liquid and an outlet zone for a gas/liquid mixture. The mixing arrangement adjoins the gas feed nozzle. The gas feed nozzle is tapered in the direction of the mixing arrangement and opens into the inlet zone. The mixing arrangement has at least one liquid intake opening in the inlet zone. In the inlet zone a ratio of a diameter DG of a gas outlet opening of the gas feed nozzle and an internal diameter DM of the mixing arrangement is in the range from 1:3 to 1:5. A gas regulating valve meters a quantity of the gas being supplied with the gas feed nozzle. The dispersion nozzle may be used in a flotation machine.
    Type: Application
    Filed: August 30, 2012
    Publication date: July 31, 2014
    Inventors: Stefan Blendinger, Robert Fleck, Gerold Franke, Lilla Grossmann, Werner Hartmann, Wolfgang Krieglstein
  • Publication number: 20140202932
    Abstract: The present invention provides a turbulent flow fly ash flotation process and flotation device. The process of the present invention comprises the following steps: 1) adding a flotation agent and/or a collecting agent to fly ash raw material to form a mixture; 2) in the flotation device, allowing the mixture obtained from step 1) to fall from the upper part of the flotation device; 3) forming upwardly blowing gas in the flotation device, the gas having countercurrent contacts with the falling mixture of step 2), and in the process of the upward movement of the gas, the gas being in a turbulent state; 4) collecting particles which are formed by the upward movement of the gas in step 3) and which pass through the flotation plate of the flotation device. In the present invention, the gas for blowing bubbles and particles upward is in a turbulent state to provide improved flotation effect and higher flotation rate.
    Type: Application
    Filed: December 30, 2011
    Publication date: July 24, 2014
    Applicant: Fujian Longyan Longneng Flyash Comprehensive Utilization Co., Ltd.
    Inventor: Minqing Xu
  • Publication number: 20130341251
    Abstract: A flotation device for separating off a valuable mineral from a suspension, has a housing having a flotation chamber, a foam collector for removing a foam product formed in an upper region of the flotation chamber, a feed arrangement for feeding gas and/or suspension into the flotation chamber, an adjustable orifice via which the flotation chamber is horizontally divided into an upper part and a lower part and an open internal diameter of the flotation chamber is locally avoidable. The orifice is arranged completely in a suspension region of the flotation chamber. A measuring arrangement determines a variable in the operation of the flotation device. A control appliance connected to the arrangement automatically adjusts the orifice in dependence on the at least one state variable.
    Type: Application
    Filed: January 3, 2012
    Publication date: December 26, 2013
    Inventors: Stefan Blendinger, Robert Fleck, Gerold Franke, Lilla Grossmann, Werner Hartmann, Wolfgang Krieglstein
  • Patent number: 8360246
    Abstract: In a froth flotation method and apparatus an upwardly open circular trough (4) having outlets (5) on the outer periphery of the trough is arranged horizontally above the froth phase (F) so that the trough is coaxial with the flotation vessel (1), and said circular trough is rotated around its center axis. A stationary water pipe (6) is arranged above the trough (4). Fresh water (W) is fed via the water pipe (6) into the trough (4) while the trough is rotating, and the water is let to flow by gravity and centrifugal force from the trough (4) via the outlets (5) into the froth phase (F).
    Type: Grant
    Filed: June 3, 2010
    Date of Patent: January 29, 2013
    Assignee: Outotec Oy
    Inventor: Peter Bourke
  • Patent number: 8323383
    Abstract: In a cyclone and a method for operating a cyclone, in a duct leading to an inlet of the cyclone, at least partial separation of particles according to size takes place. A bypass arrangement diverts selected particles to the discharge duct of the cyclone. The cyclone is suitable for separating particles from blast furnace waste gases.
    Type: Grant
    Filed: February 13, 2008
    Date of Patent: December 4, 2012
    Assignee: Siemens Vai Metals Technologies Ltd.
    Inventors: Peter Evans, William Barry Featherstone
  • Patent number: 8281932
    Abstract: The present invention relates to an apparatus and a process for efficient hydrophobic particles to gas bubble attachment in a slurry is provided. The process comprises: tangentially introducing a slurry stream into a cylindrical chamber having a cylindrical inner wall with sufficient volume and pressure to develop a vortex in the flowing slurry; introducing gas into the flowing slurry during at least a portion of its travel in the chamber, the gas being introduced orthogonally to the stream through means located at the chamber inner wall and for developing gas bubbles which move into the slurry.
    Type: Grant
    Filed: September 28, 2007
    Date of Patent: October 9, 2012
    Assignee: Hydro Processing & Mining Ltd.
    Inventors: Jakob H. Schneider, Tomasz Duczmal
  • Patent number: 8251228
    Abstract: Process and apparatus are described for adsorptive bubble separation of hydrophobic particles from liquid dispersions. The process may be used to treat the gas/liquid dispersion after it has been introduced from two or more ducts near the perimeter or from a central duct of the separation vessel. When the gas-liquid-particle dispersion is introduced from a central duct, the rising bubbles are directed by, e.g., a baffle toward the perimeter of the apparatus, where they rise. At the liquid surface, bubbles with attached hydrophobic materials form a floating froth layer, which is directed toward a central froth collection launder. Rising froth at the perimeter pushing the froth bed into the reduced area of the center encourages further coalescence of the bubbles and increases liquid drainage from the froth, thus leading to concentration of the collected materials without the need for complex equipment geometry.
    Type: Grant
    Filed: June 18, 2008
    Date of Patent: August 28, 2012
    Assignees: Renewable Algal Energy, LLC, Eastman Chemical Company
    Inventors: Robert L. Clayton, Stephen N. Falling, Jeffrey S. Kanel, C. Calvert Churn, III
  • Patent number: 8231008
    Abstract: An apparatus for separating a mineral from a slurry of mineral and impurities, including a fluid vessel having a first, open end and a second end and a feed well disposed near the first end. The feed well has a first, open end, for receiving the slurry, and a second end. At least one first member is received through the first ends of the vessel and the feed well for providing aerated water, creating a froth in the feed well including substantially the mineral. The mineral froth substantially separates from the impurities and floats out of the feed well towards the first end of the vessel, and a collection unit receives the mineral froth. The impurities and any remaining mineral fall toward the second end of the vessel. A measurement unit is placed within the vessel for measuring at least one of density and pressure of the fluid in the vessel.
    Type: Grant
    Filed: February 12, 2009
    Date of Patent: July 31, 2012
    Assignee: MOS Holdings Inc.
    Inventors: Stanley A. Patterson, David R. Spedden, Anthony F. Harding, David Kennedy
  • Patent number: 8210359
    Abstract: A flotation cell for separating hydrophobic particles from hydrophilic particles uses a mixer (1) with an air inlet (8) and slurry feed (7) to form a bubbly mixture in a u-tube mixer (4, 5, 6) and feed the mixture into a separation vessel (2). Plant cost and operating efficiencies are optimised by gravity feed of slurry and admitting air at atmospheric pressure. The separation vessel (2) has an upper inclined plate (9) which guides the froth layer (33) containing the hydrophobic particles to an overflow launder (11) without any significant turbulence or change in direction optimising the retention of hydrophobic particles in the froth, while the hydrophilic particles drop down in the liquid layer (34) guided along a lower inclined plate (24) to a tailings outlet (14).
    Type: Grant
    Filed: July 12, 2007
    Date of Patent: July 3, 2012
    Assignee: Newcastle Innovation Limited
    Inventor: Noel William Alexander Lambert
  • Patent number: 8196750
    Abstract: A method of concentrating particles in a liquid-particle dispersion feed by adsorptive bubble separation by intimately contacting a gas with a pressurized stream of liquid in a chamber to form an aerated dispersion that retains at least some of the kinetic energy from the pressurized stream, and removing at least some of the kinetic energy from the aerated dispersion to form a dense foam. A liquid-particle dispersion feed is then injected into the dense foam to form a gas-liquid-particle dispersion. The gas-liquid-particle dispersion is injected into a flotation chamber at a point below a surface of a liquid contained therein, where the gas-liquid-particle dispersion forms bubbles of a gas-particle agglomerate, and the bubbles are released from the feed liquid depleted in hydrophobic particles and rise to the surface to form a floating froth enriched in particles.
    Type: Grant
    Filed: June 18, 2008
    Date of Patent: June 12, 2012
    Assignees: Renewable Algal Energy, LLC, Eastman Chemical Company
    Inventors: Jeffrey S. Kanel, Robert L. Clayton
  • Patent number: 8177071
    Abstract: An injector for a flotation cell, comprising a feed channel for feeding a fiber suspension flow to the flotation cell, a flow distribution element for distributing the fiber suspension flow fed to the injector into partial flows, a mixing apparatus for mixing air with the fiber suspension flow, and at least one air input point for sucking air to be mixed with the fiber suspension flow into the injector. The feed channel, the flow distribution element and the mixing apparatus are in the injector arranged with respect to one another such that a flow direction of the fiber suspension flow in the feed channel is substantially opposite to a flow direction of the fiber suspension flow through the flow distribution element and the mixing apparatus.
    Type: Grant
    Filed: April 3, 2008
    Date of Patent: May 15, 2012
    Assignee: Metso Paper, Inc.
    Inventor: Erkka Nieminen
  • Patent number: 8167133
    Abstract: An injector of a flotation cell, the injector comprising a feed pipe for feeding a fiber suspension flow into the flotation cell, a mixing apparatus for mixing air into the fiber suspension flow and at least one air feed connection arranged before the mixing apparatus for feeding air into the injector. The injector further comprises a nozzle section which is arranged before the mixing apparatus and comprises an aperture plate provided with apertures and nozzles fixed to the aperture plate substantially at the apertures after the aperture plate, there being open spaces between the nozzles. The air to be fed from the air feed connection is arranged to flow into the spaces between the nozzles and further into the mixing apparatus with the partial flows of the fiber suspension flow entering from the nozzles.
    Type: Grant
    Filed: June 15, 2006
    Date of Patent: May 1, 2012
    Assignee: Metso Paper, Inc.
    Inventors: Erkka Nieminen, Veikko Kankaanpää, Vesa Harju
  • Publication number: 20120074046
    Abstract: In a froth flotation method and apparatus an upwardly open circular trough (4) having outlets (5) on the outer periphery of the trough is arranged horizontally above the froth phase (F) so that the trough is coaxial with the flotation vessel (1), and said circular trough is rotated around its center axis. A stationary water pipe (6) is arranged above the trough (4). Fresh water (W) is fed via the water pipe (6) into the trough (4) while the trough is rotating, and the water is let to flow by gravity and centrifugal force from the trough (4) via the outlets (5) into the froth phase (F).
    Type: Application
    Filed: June 3, 2010
    Publication date: March 29, 2012
    Applicant: OUTOTEC OYJ
    Inventor: Peter Bourke
  • Patent number: 8127931
    Abstract: Unburned carbon is efficiently separated according to the properties of fly ash. An apparatus is provided which comprises: a slurry preparation tank (10) in which water (c) is added to fly ash (a) to produce a slurry (d); a scavenger addition device (20) for adding a scavenger (e) to the slurry (d); a vertical surface-modification device (30) in which the slurry after addition of the scavenger is stirred at a high speed to impart shear force thereto and thereby cause the scavenger (e) to adhere to the surface of unburned carbon (b) contained in the slurry; a regulating tank (60) in which a blowing agent (f) is added to the slurry (d?) which has undergone surface modification with the surface modification device; and a flotation machine (70) with which the unburned carbon (b) is floated together with bubbles (n) and separated from the slurry containing the blowing agent.
    Type: Grant
    Filed: December 26, 2006
    Date of Patent: March 6, 2012
    Assignee: Mitsui Engineering & Shipbuilding Co., Ltd.
    Inventors: Kazuyoshi Matsuo, Kazuo Abe, Hitoshi Koyama, Toshio Yamaki
  • Patent number: 8038012
    Abstract: A procedure and apparatus for the concentration of hydrophilic materials through flotation which consists of two devices operating in series. The first device performs the function of feeding the gas and the pulp, generate bubbles and produce contact with the hydrophobic particles to be concentrated. The second device performs the functions of separating and evacuating the froth carrying the hydrophobic materials and the evacuation of the aqueous pulp with the materials with water affinity. The gas-pulp mixing device contains inside it solid mixing means, preferably bead shaped and of a density lower than that of the pulp to be processed. The generation of bubbles and their contact with hydrophobic materials happen when the gas and the pulp transit through the interstices between the mixing media which have discrete freedom to move in the interior.
    Type: Grant
    Filed: June 19, 2007
    Date of Patent: October 18, 2011
    Inventor: Daniel Urizar
  • Patent number: 7992718
    Abstract: The method relates to particle separation from a feed stream. The feed stream is injected directly into the froth zone of a vertical flotation column in the presence of a counter-current reflux stream. A froth breaker generates a reflux stream and a concentrate stream, and the reflux stream is injected into the froth zone to mix with the interstitial liquid between bubbles in the froth zone. Counter-current flow between the plurality of bubbles and the interstitial liquid facilitates the attachment of higher hydrophobicity particles to bubble surfaces as lower hydrophobicity particles detach. The height of the feed stream injection and the reflux ratio may be varied in order to optimize the concentrate or tailing stream recoveries desired based on existing operating conditions.
    Type: Grant
    Filed: September 2, 2009
    Date of Patent: August 9, 2011
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventor: Edgar B. Klunder
  • Publication number: 20100230326
    Abstract: An oil sands flotation circuit wherein a feed stream is fed to a bank comprising at least one rougher flotation cell producing a rougher concentrate stream and a rougher tailings stream, said rougher concentrate stream being fed to a bank comprising at least one cleaner flotation cell producing a cleaner concentrate stream and a cleaner tailings stream.
    Type: Application
    Filed: May 16, 2008
    Publication date: September 16, 2010
    Inventors: Michael Francis Young, Le Vi Huynh
  • Publication number: 20100059415
    Abstract: A froth flotation method and apparatus for extracting a valuable substance from a slurry comprising a mixture of solid phase, liquid phase and said substance. A gas dispersing mechanism (4) feeds gas into the slurry (1) in a flotation vessel (2) to infuse gas bubbles into the slurry. The slurry is agitated in the flotation vessel (2) for dispersing the gas bubbles into the slurry. The gas bubbles capture the valuable substance from the slurry and form a froth phase F above the slurry phase S. The froth phase F exits the vessel by overflow. Continuously moving negative pressure zones (7) are mechanically generated by rake blades (9) in the froth phase (F). The negative pressure zones (7) extend from the froth phase (F) to the slurry phase (S).
    Type: Application
    Filed: July 2, 2009
    Publication date: March 11, 2010
    Applicant: OUTOTEC OYJ
    Inventor: Christian Kujawa
  • Patent number: 7562777
    Abstract: An injector assembly that forms means for gasifying a slurry by expanding the infeed bore within the injector assembly having a source of ambient air in communication therewith whereby the negative pressure created draws air into the slurry prior to injection into a flotation cell whereupon the contaminants within the slurry combine with the air bubbles forming a foam at the surface of the cell that is passively directed into a reject nozzle leaving a decontaminated slurry, known as the accept, which is channeled therefrom for further processing.
    Type: Grant
    Filed: June 12, 2006
    Date of Patent: July 21, 2009
    Inventor: Narayanasamy Seenivasan
  • Patent number: 7544271
    Abstract: Disclosed is an open flotation de-inking module for recycled paper comprised of a flotation cell having an injector module and air control module used in conjunction to infuse micro air bubbles into pulp slurry to optimize the process of separating ink, clay, stickies and other float able contaminants from the recycled pulp slurry by negatively pressurizing the slurry as it accelerates through the injector drawing air from the air control module saturating the slurry with air bubbles before injection into the flotation cell whereupon the contaminants will adhere to the bubbles as they move to the surface forming a foam that is passively skimmed into reject compartments with the decontaminated pulp channeled from the floatation cell for further processing.
    Type: Grant
    Filed: June 12, 2006
    Date of Patent: June 9, 2009
    Inventor: Narayanasamy Seenivasan
  • Patent number: 7510083
    Abstract: An apparatus for separating a mineral from a slurry of mineral and impurities, including a fluid vessel having a first, open end and a second end and a feed well disposed near the first end. The feed well has a first, open end, for receiving the slurry, and a second end. At least one first member is received through the first ends of the vessel and the feed well for providing aerated water, creating a froth in the feed well including substantially the mineral. The mineral froth substantially separates from the impurities and floats out of the feed well towards the first end of the vessel, and a collection unit receives the mineral froth. The impurities and any remaining mineral fall toward the second end of the vessel. A measurement unit is placed within the vessel for measuring at least one of density and pressure of the fluid in the vessel.
    Type: Grant
    Filed: April 6, 2005
    Date of Patent: March 31, 2009
    Assignee: The Mosaic Company
    Inventors: Stanley A. Patterson, David R. Spedden, Anthony F. Harding, David Kennedy
  • Patent number: 7494016
    Abstract: The machine productivity for a foam product is increased by increasing the surface of the enlarged upper part of the cylinder housing and by reducing material intensity by optimizing the dimensions thereof. This is obtained by determining the diameter of the enlarged housing part in the known machine which contains a cylinder housing consisting of an enlarged upper part and a lower part, and a feeder, ventilation and discharge device, embodied in the form of ejectors, a discharge device, and a foam collector container, with the aid of an equation according to the diameter of the lower part of the cylinder housing, the height of the cylinder housing and the height of the lower part of the cylinder housing. The foam collector container of the pneumatic flotation column is embodied in the shape of a gabled groove and is fitted with opposite connection parts used to discharge the foam product.
    Type: Grant
    Filed: August 3, 2005
    Date of Patent: February 24, 2009
    Assignees: Siemens Aktiengesellschaft, Zao NPVZ Uralmechanobr-Technika
    Inventors: Igor Fagamjanowitsch Garifulin, Viktor Alexeewitsch Malzew, Marc Grigorjewitsch Viduyetsky
  • Publication number: 20080251427
    Abstract: A flotation separation system is provided for partitioning a slurry that includes a hydrophobic species which can adhere to gas bubbles formed in the slurry. The flotation separation system comprises a flotation separation cell that includes a sparger unit and a separation tank. The sparger unit has a slurry inlet for receiving slurry and a gas inlet to receive gas with at least enough pressure to allow bubbles to form in the slurry within the sparger unit. The sparger unit includes a sparging mechanism constructed to disperse gas bubbles within the slurry. The sparging mechanism sparges the gas bubbles to form a bubble dispersion so as to cause adhesion of the hydrophobic species to the gas bubbles substantially within the sparger unit while causing a pressure drop of about 10 psig or less across the sparging mechanism. The sparger unit includes a slurry outlet to discharge the slurry and the bubble dispersion into the separation tank.
    Type: Application
    Filed: April 11, 2008
    Publication date: October 16, 2008
    Inventors: Michael J. Mankosa, Jaisen Kohmuench, Eric S. Yan, Gerald H. Luttrell
  • Patent number: 7381305
    Abstract: A method and apparatus are presented for determining the quantity of liquid and solid content in a removal stream of a froth created from a suspension that is generated during a froth flotation operation. Specifically, electrodes are immersed in the froth generated from a suspension having a known quantity of fiber particles, and the conductance of the froth is measured to establish a relationship between the measured conductance and the quantity of fiber particles. The electrodes are then submerged in a froth generated from a suspension having an unknown quantity of fiber particles, and the froth conductance is measured. The quantity of fiber particles in the froth can then be determined from the pre-established relationship between conductance and solid particle content.
    Type: Grant
    Filed: March 25, 2005
    Date of Patent: June 3, 2008
    Assignee: The United States of America as represented by the Secretary of Agriculture
    Inventors: JunYong Zhu, Freya Tan, Roland Gleisner
  • Patent number: 7296682
    Abstract: A method for controlling operation of a flotation cell, where the liquid level and the foam level in the cell are measured and controlled. The method includes measuring at least one quality characteristic of the accept leaving the cell and determining the set value(s) for the liquid level and/or the foam level on the basis of the measured quality characteristic. The method is particularly suitable for flotation of a pulp suspension, particularly in deinking flotation.
    Type: Grant
    Filed: March 9, 2004
    Date of Patent: November 20, 2007
    Assignee: Andritz AG
    Inventors: Helmuth Gabl, Andreas Gorton-Hülgerth, Erwin Hertl
  • Patent number: 7281631
    Abstract: The cell includes an enclosure having, at the top, a main inlet for the pulp to be de-inked and, at the bottom, a main outlet for the de-inked pulp. The pulp from the top to the bottom, passes through successive stages provided with bubble passageways introduced into the lower portion of the enclosure, and the bubbles rise to the top, to form a foam. The cell includes pulp a guiding mechanism forming a guiding path and in which the bubble passageways are provided for. The guiding mechanisms are, on their lower face, inclined upwards in order to guide the bubbles towards the bubble passageways.
    Type: Grant
    Filed: May 14, 2004
    Date of Patent: October 16, 2007
    Assignee: Kadant Lamort, Societe par actions simplifiee
    Inventors: Alain Serres, Xavier Lacour, Stephan Pottier
  • Publication number: 20070231480
    Abstract: A film-forming apparatus includes a mixing section which mixes material particles and core particles having a large particle size than that of the material particles; a separating section which separates the material particles and the core particles; an aerosol-generator which generates aerosol by dispersing the separated material particles in a carrier gas; and a nozzle which ejects the aerosol containing the material particles. The core particles having the large particle size can be easily controlled in terms of transport amount of the core particles, as compared to the material particles which are fine particles used for the film formation. Further, since the core particles hardly cause clog-up in the system, the concentration of aerosol can be maintained stably by appropriately controlling the transport amount of the core particles.
    Type: Application
    Filed: March 15, 2007
    Publication date: October 4, 2007
    Applicant: BROTHER KOGYO KABUSHIKI KAISHA
    Inventor: Motohiro Yasui
  • Patent number: 7267232
    Abstract: An apparatus for froth flotation including a flotation vessel including a side wall and a bottom wall that includes a fluid drain, and a mixing eductor inside the vessel disposed to impart net rotational force to contents of the vessel about an axis; and a method of separating a desired constituent (e.g., coal) from a mixture of particulate matter, including the steps of conditioning a liquid mixture of particulate matter including a desired constituent with a frothing agent to create a pulp, and injecting the pulp into a vessel to impart net rotational movement of pulp in the vessel, are disclosed.
    Type: Grant
    Filed: April 30, 2004
    Date of Patent: September 11, 2007
    Assignee: The Board of Trustees of The University of Illinois
    Inventors: Latif Khan, Christopher R. Manrique
  • Patent number: 7267231
    Abstract: A process for aerating suspensions, particularly to flotate them, for example in deinking of pulp suspensions, with one or more stages and/or cells. Each stage/cell has its own separate liquid loop. A cleaner is interposed to improve removal of dirt specks.
    Type: Grant
    Filed: February 24, 2004
    Date of Patent: September 11, 2007
    Assignee: Andritz AG
    Inventor: Helmuth Gabl
  • Patent number: 7163105
    Abstract: A froth flotation process typically used to separate particulate materials such as coal, has a mixed size feed (1) separated in a sieve bend (2) into a stream of relatively fine particles (3) and a stream of relatively coarse particles (14). The fine particles are fed to a flotation cell (7) in the normal manner, while the coarse particles are mixed with wash water (16) and distributed onto or into the froth layer (10) by wash water distribution apparatus (19, 20). Alternative variations of wash water distribution apparatus able to handle coarse particles are also described.
    Type: Grant
    Filed: February 15, 2001
    Date of Patent: January 16, 2007
    Assignee: The University of Newcastle Research Associates Limited
    Inventors: Graeme John Jameson, Noel William Alexander Lambert
  • Patent number: 7108136
    Abstract: A separating device (10) especially for use in a pneumatic flotation system comprises an annular channel (18), at least one nozzle (16) for introducing aerated pulp substantially horizontally and tangentially into the annular channel (18), froth extraction means (26) for the removal of separated froth from the annular channel (18), and pulp extraction means (24) for the removal of separated pulp from the annular channel (18), the at least one nozzle (16) being configured so that the aerated pulp introduced into the annular channel (18) rotates therein with centrifugal forces of between 5 and 20 ms?2.
    Type: Grant
    Filed: March 19, 2001
    Date of Patent: September 19, 2006
    Inventor: Rainer Imhof
  • Patent number: 6968956
    Abstract: A separation apparatus and method for use in separating magnetic material from non-magnetic material that includes the use of a magnetic grid, e.g., a permanently magnetic grid, which defines a plurality of openings. The grid assists in preventing magnetic material from being transported to an overflow.
    Type: Grant
    Filed: February 22, 2002
    Date of Patent: November 29, 2005
    Assignee: Regents of the University of Minnesota
    Inventor: Iwao Iwasaki
  • Patent number: 6962618
    Abstract: Device and process for the removal of air from flotation foam formed during the flotation of a paper-fiber-containing suspension. The device includes a driven rotor that includes a shaft and at least one rotor blade positioned on the shaft, and a non-rotating wall arranged to surround the rotor in a region of the rotor blade by a non-rotating wall. The instant abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way.
    Type: Grant
    Filed: March 21, 2003
    Date of Patent: November 8, 2005
    Assignee: Voith Paper Patent GmbH
    Inventors: Gerhard Gaus, Harald Hess, Herbert Britz
  • Patent number: 6959815
    Abstract: The present invention provides for a reactive oily bubble carrier comprising: (a) a gas bubble having an oil-coating; and (b) a collector dissolved within the oil-coating. The present invention also provides for the use a reactive oily bubble carrier in a flotation target particle separation process. The present invention also provides for a flotation target particle separation process using the reactive oily bubble carriers disclosed herein.
    Type: Grant
    Filed: January 22, 2003
    Date of Patent: November 1, 2005
    Assignee: The Governors of The University of Alberta
    Inventors: Zhenghe Xu, Jianjun Liu, Zhiang Zhou