And Additional Diverse Separation Patents (Class 210/804)
  • Patent number: 6042733
    Abstract: A sediment filtering apparatus and a method for removing sediment from a waterway. One or more collector assemblies are secured to a river bottom and have a leading, ramp surface facing upstream and over which the water flows. As the water/sediment mixture passes the apex of the collector, the trailing edge drops off rapidly thereby reducing the stream velocity and allowing the sediment to settle from the flow. The sediment then collects on the downstream side of the collector and via one or more openings reaches an internal cavity. A suction pipe is placed under negative pressure and draws the water/sediment mixture to a filtering apparatus which then returns filtered water to the waterway. The sediment and debris filtered therefrom is then easily removed.
    Type: Grant
    Filed: August 26, 1998
    Date of Patent: March 28, 2000
    Inventor: Randall L. Tucker
  • Patent number: 6027658
    Abstract: An in process fluid delivery reservoir and method is disclosed for continuously filtering particulate matter and oils from industrial fluids, such as coolants, oils, aqueous emulsions, etc., which are necessary in the operation of machine tools. The reservoir utilizes a primary containment area with a primary chip screen and a first baffle to trap much of the particulate matter and contain tramp oil. The reservoir also contains secondary and tertiary containment areas which utilize upper and bottom baffles to further trap the particulate matter and tramp oils, when said reservoir is utilized with aqueous emulsion. The industrial fluid remaining in the tertiary containment area is ready to be delivered to the machine tool for reuse.
    Type: Grant
    Filed: September 30, 1998
    Date of Patent: February 22, 2000
    Assignee: Xonex Corporation
    Inventors: Richard M. Soble, George V. Strapko
  • Patent number: 5988283
    Abstract: A Vertical Combined Production Facility, or gas-well production system, in which the separation of each phase (hydrocarbon gas, hydrocarbon liquids, and produced water), dehydration of natural gas, removal of minute traces of water from the hydrocarbon liquids, and polishing of produced water, are performed in a single pressure vessel. Additionally, the pressure vessel is installed in a vertical configuration such that the pressure vessel shell also serves as the structural support for a small deck and helideck. Additionally, the inlet heating of the well flow-stream is accomplished by a heat exchanger installed in the dehydration/regeneration heater (reboiler).
    Type: Grant
    Filed: July 2, 1997
    Date of Patent: November 23, 1999
    Assignee: Union Pacific Resources Company
    Inventor: Don Mike Gann
  • Patent number: 5980754
    Abstract: A process for recovering protein, fatty and water components from a float material produced by a waste water treatment system, wherein the protein and fatty components can be further processed for inclusion in various products, such as animal feed. The recovered water component can also be further processed before discharged into a sewer system.
    Type: Grant
    Filed: January 23, 1997
    Date of Patent: November 9, 1999
    Assignee: Novus International, Inc.
    Inventors: Matthew B. Hopkins, Robert J. DeRosa
  • Patent number: 5944998
    Abstract: Rotary filtration devices and processes are disclosed. The devices have at least one inner member and at least one outer member, one or both of which rotate so that they rotate with respect to one another and which define a fluid filtration gap therebetween. There are one or more filters facing the fluid filtration gap and which are located either on the inner member or on the outer member or on both. During the filtration process, permeate passes from the feed fluid in the fluid filtration gap through the one or more filters. The inner member has an internal pathway for the flow of feed fluid. Fluid from the body of fluid to be filtered flows from the body of feed fluid to be filtered through the internal pathway, reverses direction, and then flows through the fluid filtration gap back to the body of feed fluid.
    Type: Grant
    Filed: April 21, 1998
    Date of Patent: August 31, 1999
    Assignee: Membrex, Inc.
    Inventors: Philip M. Rolchigo, Leonard T. Hodgins
  • Patent number: 5935444
    Abstract: Apparatus in fluid communication with a water leg portion of an offshore drilling or production platform sump tank for conveying the separated water into contact with an organophilic clay such that the hydrocarbons and other organic materials commingled with the sump tank water will be adsorbed onto the organophilic clay and the water will pass through the clay and will be conveyed back to the ocean water without contamination.
    Type: Grant
    Filed: May 14, 1998
    Date of Patent: August 10, 1999
    Assignee: AMCOL International Corporation
    Inventors: Michael R. Johnson, Jeffrey J. Smith
  • Patent number: 5932091
    Abstract: The effluent outflow from a shipboard oil/water separator is further reduced in oil content by passage through ultrafiltration membranes arranged in series as an added downstream treatment prior to overboard discharge. Effluent from the oil/water separator is buffered by delivery through a feed pump and use of a recirculation pump through which such downstream ultrafiltration treatment is subject to conditional flow control as well as periodic backflush cleansing of the filter membranes.
    Type: Grant
    Filed: January 22, 1998
    Date of Patent: August 3, 1999
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Kevin Todd Tompkins, Jerome S. Stefanko, Brian L. Owsenek, Lawrence W. Tomlinson, Joseph A. Gavin
  • Patent number: 5906748
    Abstract: This invention provides a process to tremendously reduce the bulk volume of contaminants obtained from an effluent stream produced subsurface remediation. The chemicals used for the subsurface remediation are reclaimed for recycling to the remediation process. Additional reductions in contaminant bulk volume are achieved by the ultra-violet light destruction of halogenated hydrocarbons, and the complete oxidation of hydrophobic fuel hydrocarbons and hydrophilic hydrocarbons. The contaminated bulk volume will arise primarily from the disposal of the toxic metal ions. The entire process is modular, so if there are any technological breakthroughs in one or more of the component process modules, such modules can be readily replaced.
    Type: Grant
    Filed: June 27, 1995
    Date of Patent: May 25, 1999
    Assignee: The Regents of the University of California
    Inventors: Edward J. Kansa, Brian L. Anderson, Ananda M. Wijesinghe, Brian E. Viani
  • Patent number: 5879556
    Abstract: A method for the recovery of extractant from the aqueous effluent continuously exiting from a solvent extraction circuit, in which the effluent is contacted with the same water-immiscible diluent being used in the circuit as solvent for the extractant, such that the extractant transfers from the aqueous effluent phase to the diluent phase. The diluent phase, now enriched in extractant, is separated from the aqueous effluent, now depleted in extractant. The separated diluent phase can then be recontacted with effluent or may be combined with the organic phase of the solvent extraction circuit.
    Type: Grant
    Filed: January 25, 1995
    Date of Patent: March 9, 1999
    Assignee: Henkel Corporation
    Inventor: Hans C. Hein
  • Patent number: 5871647
    Abstract: The wastewater treatment unit is operable under high intermittent flow rate variations. It comprises a first clarifier in which is carried out a gravitational settling of solids and a second clarifier comprising a network of parallel plates inclined with respect to the vertical and a portion defining a collecting pit. Each plate has an upper edge positioned at a height lower than the filling level of the first clarifier to define an overflow giving access to the collecting pit. The network of plates allows to carry out a further settling of solids to create a counterflow of settled matter toward the first clarifier and a flow of clarified wastewater falling in the collecting pit. A filtering chamber is positioned above the first clarifier and comprises a filtering media supporting a biomass for digesting the organic content of the wastewater coming from the second clarifier.
    Type: Grant
    Filed: February 20, 1997
    Date of Patent: February 16, 1999
    Inventor: Yves Lord
  • Patent number: 5846314
    Abstract: A method of treating a dilute aqueous suspension of solid particulate material comprising waste material from a process for recovering petroleum from oil sand includes diluting the suspension with at least 75% of its own volume of water thereby to increase the settling rate of the particulate material and allowing the particulate material to settle to form a concentrated solid sediment. The treated suspension may have been obtained from a process in which an alkaline solution is used to treat the oil sand. The water from which the concentrated solid sediment is separated may be returned to the process for recovering petroleum from oil sand. The solid sediment may be transferred to a separation vessel in which it is fractionated into a coarse particle fraction and a fine particle fraction. The fine particle fraction may comprise essentially particles having an equivalent spherical diameter not greater than 3 .mu.m. The concentrated solid material recovered may be calcined to form a pozzolanic material.
    Type: Grant
    Filed: October 29, 1996
    Date of Patent: December 8, 1998
    Assignee: ECC International Ltd.
    Inventor: Christopher Robin Langdon Golley
  • Patent number: 5843315
    Abstract: Provided is a novel method and system for recovering aggregate fine size particles from a carrying medium. The method comprises:(a) introducing a feed containing particles to a sand screw, and separating the particles into separate groups of large and fine particles, the fine particles being present in a fine particle stream;(b) introducing the fine particle stream from the sand screw to one or more hydraulic centrifugal separators which overflow a fine particle stream and discharge a coarse particle stream;(c) introducing the overflow fine particle stream from the one or more hydraulic centrifugal separators to a thickening tank and removing precipitated material as an underflow stream from a lower portion of the thickening tank; and(d) introducing the underflow from the thickening tank to a filtering unit.
    Type: Grant
    Filed: May 10, 1996
    Date of Patent: December 1, 1998
    Assignee: Vulcan Materials Company
    Inventors: Bruce E. Baughn, Dennis M. McClelland
  • Patent number: 5833863
    Abstract: The present invention discloses, in certain embodiments, a method for treating a concrete slurry to recover constituents thereof, the constituents including water, coarse aggregate, fine aggregate, and cement solids, the method comprising removing aggregate from the concrete slurry with aggregate separation apparatus, the aggregate separation apparatus producing a secondary slurry containing cement solids, feeding the secondary slurry to a clarifier in which cement solids settle out from the secondary slurry to a bottom of the clarifier and a liquid which is primarily water is disposed above the cement solids, removing the liquid from the clarifier, feeding settled out cement solids in liquid from the clarifier to a centrifuge, separating settled out cement solids from the liquid in the centrifuge producing an amount of liquid and an amount of settled out cement solids with liquid.
    Type: Grant
    Filed: April 21, 1997
    Date of Patent: November 10, 1998
    Assignee: Tuboscope Vetco Int'l Inc.
    Inventors: Michael J. Richards, James R. Dial
  • Patent number: 5824222
    Abstract: Recycling apparatus for use in a closed-loop waste-treatment system includes components for removal of inert materials. Typically, the system includes a treatment vessel used in conjunction with a clarifier in an internal recycle configuration; clear water from the top of the clarifier is conducted away from the system as treated effluent, while a portion of the biomass settling at the bottom of the clarifier is returned to the head of the treatment vessel through a hydrocyclone and screen arrangement to remove inert content, thereby substantially increasing the efficiency of biological waste-digestion processes.
    Type: Grant
    Filed: April 29, 1997
    Date of Patent: October 20, 1998
    Assignee: Micronair, LLC
    Inventors: Gene E. Keyser, Donald Marvin Holcombe
  • Patent number: 5814230
    Abstract: Method and apparatus are provided for separating coarse and ultrafine solids from a liquid stream to produce a substantially dry solids discharge and a clarified liquid. Apparatus is provided comprising a combination of a settling tank, a plurality of filter screens spaced along an endless link-chain conveyor, a screen vibrator and directed air streams. In operation, coarse solids settle preferentially to the tank bottom. Ultrafines solids remain in suspension. Relatively coarse filter screens are conveyed from a point outside the tank to traverse a prolonged path through the liquid. Ultrafine solids are captured on the screens, by filtering the liquid through an ever finer build-up of filter cake. The relatively large number of passes of the screens through the liquid provides effective filtering of suspended solids. Further, the screens dredge settled solids from the tank bottom.
    Type: Grant
    Filed: August 30, 1996
    Date of Patent: September 29, 1998
    Inventors: H. Craig Willis, Bradley C. Willis, W. Brent Willis
  • Patent number: 5788848
    Abstract: An apparatus and method for separating material which includes solid and/or particulate matter from flowing liquid and/or gas. The apparatus includes a separation panel positioned in a fluid flow path, and the separation panel is housed in a separation chamber. Fluid can be introduced into the separation chamber by an inlet to establish a circular flow of the fluid within a confine of the separation panel, so material entrained in the fluid is trapped within the confine of the separation panel. The separation panel, separation chamber and inlet can be dimensioned and disposed such that as the apparatus operates, the flow of the fluid outside the separation panel is in a direction opposite to a direction of the flow of the fluid within the separation panel.
    Type: Grant
    Filed: March 24, 1997
    Date of Patent: August 4, 1998
    Inventors: Paul Blanche, Stephen Crompton
  • Patent number: 5770092
    Abstract: The invention provides a multi-stage apparatus for continuous waste water filtration, comprising a first tank provided with a waste water inlet pipe to supply waste water containing suspended solids to the tank, means for adding a coagulant to the waste water and an outlet pipe, a second tank receiving the mixture of waste water and coagulant from the outlet pipe, the second tank being sufficiently large to allow larger suspended solids to settle and being provided with a lower, openable port for discharge of the settled solids and having an upper weir for discharge of partially-cleared water, a continuously-driven, non-taut perforated belt, having a surface positioned to receive, at a first location, a stream of the discharged, partially-cleared water, the belt perforations being sized to enable the passage of clear water therethrough while retaining fine and coagulated solids on the surface for subsequent discharge at a second location, and the belt being non-taut to form a trough for retaining a body of wa
    Type: Grant
    Filed: March 12, 1997
    Date of Patent: June 23, 1998
    Assignee: Solar Dynamics Ltd.
    Inventor: Eitan Sharir
  • Patent number: 5728305
    Abstract: Waste water is reclaimed for reuse by combined use of settling tanks, ozonation and filtration. The settling tanks remove substantial solid matter from the waste water. The waste water from the last settling tank is treated with ozone to remove contaminants and purify the water. This ozonated water is then returned to the last settling tank to mix with the waste water. This ozonated water in the last tank is then subjected to a plurality of filtering actions before being stored in a clean water holding tank. Partially treated water or discharge from filters is returned to a different holding tank to mix with waste water and dilute the waste water.
    Type: Grant
    Filed: December 19, 1996
    Date of Patent: March 17, 1998
    Assignee: Water Recycling Systems, Inc.
    Inventor: Jay M. Hawkinson
  • Patent number: 5720885
    Abstract: Apparatus for treating and dewatering of sludge taken from small-scale sewage treatment plants. The apparatus, which preferably is mounted on a vehicle, incorporates chamber-type units for dewatering, which can be connected by way of feed and return pipes, controllable valves, and pumps that can be switched on and off. A dewatering vessel with filter walls and separate sludge and filtrate chambers is connectable with a sludge chamber and a filtrate chamber, respectively, of a second dewatering vessel by way of joining pipes comprising at least one feeding pump and one controllable valve each, a radiation chamber arranged in the filtrate return pipe of one of the dewatering vessels, and a stone trap arranged in one other sludge feed pipe.
    Type: Grant
    Filed: December 8, 1995
    Date of Patent: February 24, 1998
    Assignee: Simon Moos Maskinfabrik A/S
    Inventor: Simon Moos
  • Patent number: 5707535
    Abstract: A portable vacuum loadable liquid-solid separator tank having a bed with a drain, surrounding sides and a dividing wall. A grate overlays the interior of the vessel, bed, and sides, and forms the dividing wall. A filter overlays the grate, extending up the sides and covering the top and the dividing wall. The separator is filled with a sludge which is then separated from the liquid it contains by gravity and hydrostatic pressure which force the liquid through the filter. Liquid is drained out of the bottom of the vessel and the solids are transported within the vessel. The solids are removed through a gate that may be provided in the tank, or by using a hydraulic lift system in much the same manner as a garbage truck empties a municipal dumpster. The filter is removed with the solids and usually discarded.
    Type: Grant
    Filed: August 28, 1996
    Date of Patent: January 13, 1998
    Inventor: Ronald B. Harris
  • Patent number: 5695645
    Abstract: Spent solutions from photographic processors are fed into a conduit (18) to which subsequently are added precipitating agents from a first source (22) and flocculating agents from a second source (28); so that, well grown or ripened clumps of flocculated solids are formed along the conduit before being emptied into a gravity collecting vessel and shipping container (38) from which clarified liquids are displaced by a mass (50) of accumulated flocculated solids, typically through a filter (58, 142, 150, 158, 162, 166, 220)for removal of any unsettled fines. Many of the clumps of flocculated solids become enlarged enough to individually extend across and substantially fill a cross-sectional area of the conduit. As a result, the enlarged clumps substantially block passage of and strain from the solution remaining fine particles which then adhere to the clumps.
    Type: Grant
    Filed: May 16, 1996
    Date of Patent: December 9, 1997
    Assignee: Eastman Kodak Company
    Inventors: Thomas W. Bober, Terry W. Pearl, Dominick Vacco, David C. Yeaw
  • Patent number: 5679258
    Abstract: A system to collect by vacuum conveyance, separate, and discharge two mixed immiscible liquids with different specific gravities comprising a grit, sediment, particulate, and floating debris removal/collection chamber 11, vacuum tank 51, optional heavy phase supplemental separation stage 47A, and optional light phase supplemental separation stage 47B. Vacuum tank 51 is under a constant regulated vacuum, which sucks mixed immiscible liquids with different specific gravities from their respective remote source(s) through conduit(s) connected to vacuum tank 51. Collection conduits can have manually, mechanically, or electro-mechanically controlled valves at their source ends. Any grit, sediment, particles, floatable debris, and entrained air in the collection conduits is removed from the mixed liquid stream prior to undergoing any phase separation stages. Initial phase separation occurs automatically in vacuum tank 51, which provides quiescent conditions for gravity separation of mixed immiscible liquids.
    Type: Grant
    Filed: July 10, 1995
    Date of Patent: October 21, 1997
    Inventor: Robert N. Petersen
  • Patent number: 5676840
    Abstract: A waste-oil cleaning method includes filling a processing tank with waste oil, allowing non-oil liquids in the waste-oil to settle to the base of the tank, then withdrawing the settled non-oil liquids from the base of the tank. After these non-oil liquids are withdrawn, the remaining partially cleaned oil is cleaned by pumping oil out of the tank and passing the oil sequentially through a mesh filter and a centrifuge.
    Type: Grant
    Filed: August 8, 1996
    Date of Patent: October 14, 1997
    Inventor: Christopher G. Paul
  • Patent number: 5662811
    Abstract: Apparatus for creating gas-liquid interfacial contact conditions for highly efficient mass transfer between gas and liquid comprises a gas-liquid contactor assembly including a hollow porous tube surrounded by an outer jacket defining a gas plenum between the jacket and the porous tube; a liquid feed assembly including a nozzle for injecting liquid into the porous tube in a spiraling flow pattern around and along the porous tube; a gas-liquid separator assembly at the first end of the porous tube including a nonporous degassing tube coaxially aligned with and connected to the porous tube, a gas outlet port coaxially aligned with the degassing tube to receive a first portion of gas flowing from the degassing tube, a first gas duct coaxially aligned with and connected to the gas outlet duct to convey the first portion of gas therefrom; and a liquid collection assembly. A second gas discharge assembly to collect and convey gas from the first end of the porous tube is also disclosed.
    Type: Grant
    Filed: March 18, 1996
    Date of Patent: September 2, 1997
    Assignee: Revtech Industries, Inc.
    Inventors: Thomas L. Grisham, Janet K. Peters, Keith W. Sharp, Edward E. Ebel
  • Patent number: 5662804
    Abstract: Disclosed is a clarifier for use in treating a liquid containing non-soluble particles in suspension in order to separate these particles from the liquid. It comprises a tank, a liquid supply duct opening into the bottom portion of the tank and an injector for injecting a gas under pressure into at least part of liquid supplied to the supply duct in order to saturate this liquid with said gas and thus to generate gas bubbles as the saturated liquid is subject to depressurization within the tank. The gas bubbles that are so-generated adhere to the particles in suspension in the liquid and lift them up to form a floating layer of sludge in the top portion of the tank. A scraper is provided in the top portion of the tank for skimming off the layer of sludge while it is formed. A plurality of plates extend at an angle within the tank above the supply duct.
    Type: Grant
    Filed: March 22, 1996
    Date of Patent: September 2, 1997
    Assignee: Les Traitements des Eaux Poseidon Inc.
    Inventor: Reneau Dufour
  • Patent number: 5662802
    Abstract: A method for enhancing solvent extraction of organic wastes from contaminated waste mixtures. A contaminated waste mixture is contacted with a solvent with high driving force for solvation of water, and most preferably with a solvent which is both anhydrous and which has an appreciable affinity for solvation of water. While the solvent is in contact with the contaminated waste mixture, a portion of the organic waste is dissolved in the solvent. Then, the solvated organic waste and residual solvent is removed from the contaminated waste mixture. Solvent is recovered, preferably by distillation, and is then dehydrated, prior to repeating the cycle. The technique substantially improves the degree of removal of certain organic wastes from contaminated waste mixtures, and has been demonstrated to be particularly useful for removal of pesticides from organic waste mixtures.
    Type: Grant
    Filed: July 7, 1994
    Date of Patent: September 2, 1997
    Assignee: Ionics, Incorporated
    Inventors: William F. Heins, James C. Nowak
  • Patent number: 5658462
    Abstract: A process for recovering protein, fatty and water components from a float material produced by a waste water treatment system, wherein the protein and fatty components can be further processed for inclusion in various products, such as animal feed. The recovered water component can also be further processed before discharge into a sewer system.
    Type: Grant
    Filed: January 23, 1996
    Date of Patent: August 19, 1997
    Assignee: Water Specialists, Inc.
    Inventors: Matthew B. Hopkins, Robert J. DeRosa
  • Patent number: 5656173
    Abstract: A method of removing dispersed oil from an oil in water emulsion is accomplished by the steps of dissolving gas in water to form an aerated solution, introducing the emulsion and aerated solution into a treatment vessel in which is positioned a coalescing media formed by an assembly of closely spaced corrugated plates of oleophilic material, the emulsion and aerated solution passing in contact with the plates to cause oil droplets to coalescence on the plates and small gas bubbles carried with the aerated solution to adhere to the oil droplets to increase the buoyancy of the oil droplets so that the oil droplets more readily rise to the surface of the emulsion, accumulated oil being removed from the surface.
    Type: Grant
    Filed: March 5, 1996
    Date of Patent: August 12, 1997
    Assignee: National Tank Company
    Inventors: James Michael Jordan, Thomas James Denton
  • Patent number: 5645732
    Abstract: A filtering arrangement is provided for effluent from a septic tank prior to passage to a drain field or other disposal. The filtering arrangement makes use of an open-top, U-shaped filter means into which the septic effluent is conducted from the top, preferably through a T-fitting providing an open-topped channel leading into the U-shaped filter. The filter may be formed of an outer perforated casing and an inner lining of an open-cell-type polymeric material which effects the filtering of the effluent. The U-shaped filter is preferably suspended from the T-fitting. A preferred filter includes an inner and outer casing with a fibrous filter material between. The filter also preferably has an imperforate lower portion to retain a permanent body of liquid in the bottom of the filter. The arrangement provides fail-safe filtering automatically adjustable for varying flow rates and conditions of the filter. The polymeric filter medium is changed periodically to maintain efficiency.
    Type: Grant
    Filed: June 27, 1995
    Date of Patent: July 8, 1997
    Inventor: Byron Charles Daniels
  • Patent number: 5637221
    Abstract: A wastewater treatment system and method for substantially reducing or eliminating total suspended solids (TSS), biological organic discharge or biochemical oxygen demand (BOD), and fats, oils and greases (FOG) contaminants. The system includes at least one mixing chamber for mixing wastewater with at least one dewatering agent or chemical and air to form an aerated mixture and at least one tank having a plurality of compartments for facilitating flotation, settling and removal of contaminants from the aerated mixture as it flows through the tank. Preferably, the system includes first and second mixing chambers and first and second tanks arranged in series with each of the tanks including drag lines for removing floating and settled contaminants.
    Type: Grant
    Filed: July 29, 1996
    Date of Patent: June 10, 1997
    Inventor: Thomas J. Coyne
  • Patent number: 5628914
    Abstract: A closed system for reclaiming ink, solvent, and water from waste lithographic ink, or other ink types, without generating hazardous by-products is disclosed. The recycling process is performed under vacuum conditions on standard equipment, such as an agitation station, an evaporator chamber, a grinder, a condensation tank, and a vapor exhaust recovery condenser, readily available in the ink industry. Waste ink containing ink solids, solvent, water, and possibly foreign material such as debris, lint, paper, and dust, is first mixed to create a homogeneous slurry mixture of the ink, solvent, water and foreign materials. Next, water and solvent is evaporated from the slurry mixture and collected so that it may condensate and then settle. The slurry mixture is ground and heated up in order to evaporate any remaining water and solvent from the slurry.
    Type: Grant
    Filed: October 5, 1995
    Date of Patent: May 13, 1997
    Inventor: Frank Prasil
  • Patent number: 5599460
    Abstract: The present invention provides a sensor (10) and method for detecting the presence of water or glycol in an oil system. The water/glycol sensor includes a water/glycol concentrator (12) which concentrates the water and glycol in a concentrating zone (84). A water/glycol detection probe (14) is located in the concentration zone (84) such that minute quantities of water or glycol in the system may be detected.
    Type: Grant
    Filed: August 13, 1993
    Date of Patent: February 4, 1997
    Inventors: Michael Van Schoiack, Peter von der Porten
  • Patent number: 5589081
    Abstract: A suitable liquid-solid separator tank having a bed with a drain, surrounding sides and a dividing wall. A grate overlays the interior of the vessel, bed, and sides, and forms the dividing wall. A filter overlays the grate, extending up the sides and overlapping the side grate and covering the dividing wall. The separator is filled with a sludge which is then separated from the liquid it contains by gravity and hydrostatic pressure which force the liquid through the filter. Liquid is drained out of the bottom of the vessel and the solids are transported within the vessel. The solids are removed through a gate that may be provided in the tank, or by using a hydraulic lift system in much the same manner as a garbage truck empties a municipal dumpster. The filter is removed with the solids and usually discarded.
    Type: Grant
    Filed: January 11, 1996
    Date of Patent: December 31, 1996
    Inventor: Ronald B. Harris
  • Patent number: 5582743
    Abstract: A liquid filter apparatus particularly useful in removing particulates from parts washing solvent. A filter assembly includes an exterior, fluid, impermeable container, preferably in the form of a flexible sidewall bag, and an interior filter element with permeable sidewalls and inlet and outlet ends, preferably in the form of a sleeve. In use, liquid entering the sleeve may pass unfiltered entirely through the sleeve and exit through a sidewall of the exterior container, or all or any part of such liquid may pass through the filter sleeve and into a portion of the apparatus outside the sleeve but inside the exterior container. From this portion, the liquid emerges in a filtered condition. Consequently, the filter continually operates in both filtration and bypass modes.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: December 10, 1996
    Assignee: Safety-Kleen Corp.
    Inventors: Douglas A. Larson, Thomas J. Danowski, William L. Jacoby, Jr.
  • Patent number: 5549823
    Abstract: A coalescer system (10) for oil-in-water soluble oil emulsions utilized as coolants and cutting oils for machining processes in industrial plants, comprises a deep bed of granular hydrophilic media particles (24) to effect coalescence of insoluble soaps and reverse phase water-in-oil droplets. The coalesced insoluble soaps and reverse phase emulsions flow to the liquid surface in tank (12) along with other contaminants that have an affinity for the reverse phase oil droplets and insoluble soaps, all in the form of floating waste (26). The waste (26) is then discarded. Effluent coolant may be transported back into the cooling system. The system (10) increases the stable life of the oil-in-water emulsion, minimizes the formation of foam, and removes other abrasive or otherwise harmful nonhomogeneous contaminants from the soluble oil emulsion.
    Type: Grant
    Filed: February 10, 1995
    Date of Patent: August 27, 1996
    Inventor: Gene Hirs
  • Patent number: 5545330
    Abstract: A water treatment system and process separates contaminants from water by flotation, by forming a removable floating scum of impurities utilizing a bubbling process, by filtering out suspended solids, by stripping dissolved impurities from the water with air, by oxidizing organic compounds, by adsorbing organic compounds, and finally, by disinfecting. Utilization of the disclosed process and system will transform contaminated water into an environmentally suitable state.
    Type: Grant
    Filed: December 1, 1994
    Date of Patent: August 13, 1996
    Assignee: Amerada Hess Corporation
    Inventor: Robert T. Ehrlich
  • Patent number: 5543063
    Abstract: A method of treating fungible produce at a wash station having a floor, comprising the steps of washing the produce, using a wash nozzle, with liquid containing a chemical treating agent. Effluent from the washing is collected in a storage tank. Liquid in the storage tank is conducted to a secondary tank, via a screen. Liquid in the secondary tank is conducted to a self-cleaning, self-backwashing filter. Back wash is conducted by gravity to a plurality of bag filters which collect particulate and discharge the filtered back wash into the secondary tank, above the screen. Liquid is conducted from the lower outlet of the self-backwashing filter to the storage tank. Liquid from the storage tank is conducted to the wash nozzle. The chemical treating agent is not filtered out by any of the filtration steps so that the chemical treating agent contained in the effluent from the washing may be reused and need not be dumped.
    Type: Grant
    Filed: February 15, 1995
    Date of Patent: August 6, 1996
    Assignee: Inland Aqua-Tech Equipment Systems, Inc.
    Inventors: John P. Walker, Steven Hausmann
  • Patent number: 5536420
    Abstract: A drying bed for waste sludge in a wastewater treatment facility having a vertical drainage riser extending vertically from a subnatant discharge pipe near the bottom of the drying bed. A sludge inlet at an end of the drying bed communicates with a source of watery sludge. Water communicates through a mesh screen that wraps the vertical drainage riser and through openings in the vertical drainage riser to the subnatant discharge pipe. A valve is selectively opened to control the flow rate of the water from the subnatant discharge pipe. A method of dewatering waste sludge is disclosed.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: July 16, 1996
    Inventor: Boris Oyzboyd
  • Patent number: 5534155
    Abstract: For purification of liquids used for cooling and/or lubrication interspersed with metallic and/or other materials contaminations, especially for separation of rolling scale and of substances containing oil or grease from the industrial process water in open or exposed cooling circulation cycles in the smelting industry, especially in rolling mills, it is proposed to separate the coarse rolling scale by gravity sedimentation from the contaminated process water, to subsequently remove the mid-size and fine rolling scale particles from the process water prepurified in this manner by magnetic separation, to divide by flotation the thus finished clarified or purified process water into fractions containing oil concentrate, water and the finest rolling scale particles carrying little oil, the purified process water is to be used as a cooling agent, the entire rolling scale separated out of the process water is smelted in the form of sinter and the concentrate containing oil is either rejected or subjected to a wast
    Type: Grant
    Filed: May 15, 1992
    Date of Patent: July 9, 1996
    Assignee: SMS Schloemann-Siemag Aktiengesellschaft
    Inventors: Werner Schimion, Willi Leineweber
  • Patent number: 5529695
    Abstract: A system for removing particulates, formed as metal is machined, from coog and lubricating fluid. The system has a tank filled with fluid. The bottom of the tank slopes forward. The tank receives contaminated fluid at its top rear. The contaminants are swarf (chips removed from the workpiece) and fines (which come both from the workpiece and the grinder, borer, or drill). After the swarf is removed from the contaminated fluid by a magnetic filter, only fines remain. The fluid contaminated with fines flows from back to front in the tank, passing under a baffle projecting vertically downward from the top of the tank. A whoosh plate causes the fines to settle out into the tank, while uncontaminated fluid flows over the whoosh plate and is reused. The fines collect at the tank's bottom, from where they are pumped out and mixed with the magnetically-removed swarf for removal.
    Type: Grant
    Filed: July 21, 1994
    Date of Patent: June 25, 1996
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: Paul J. Gwozdz
  • Patent number: 5484534
    Abstract: An energy conserving method and apparatus for using induced gas flotation to separate finely dispersed oil and solids from water and doing so in such a manner as to minimize the power consumption, reduce the amount of water carried with the oil and solids skimmings and eliminate complex mechanisms that would require a high degree of maintenance.Initial flotation gas is induced through a high velocity venturi using the inlet flow to supply the kinetic energy. Secondary flotation is supplied by inducing the vapor through a high velocity venturi utilizing recycled water to provide the kinetic energy. A single pump, of relatively low horse power, circulates the recycled water.The oil and solids skimmed from the surface of the water are transferred to an integral compartment for dewatering. The water is returned to the process stream by the single recycle pump.
    Type: Grant
    Filed: July 8, 1994
    Date of Patent: January 16, 1996
    Inventor: Jerry M. Edmondson
  • Patent number: 5480559
    Abstract: There is disclosed a method of treating liquid carrying suspended solids comprising the following steps: (i) introducing the liquid into a primary treatment vessel (1) and causing agglomeration of solids suspended in the liquid to form flocs which are not settleable to any substantial degree within the time the said liquid is permitted to remain in the primary vessel; (ii) transferring an aqueous component comprising the flocs from the primary treatment vessel (1) to a secondary treatment vessel (5) where a floc of a settleable nature is caused to form; and (iii) permitting said floc to settle under gravity in the secondary vessel (5) and recovering an aqueous component having a substantially reduced concentration of suspended solids relative to the original liquid; wherein the liquid is subjected in the primary vessel to flow patterns, including a low energy circulating flow about a vertical axis of the primary vessel, which provide conditions for the formation of the substantially non-settleable flocs conta
    Type: Grant
    Filed: November 15, 1993
    Date of Patent: January 2, 1996
    Assignee: Hydro International PLC
    Inventor: Robert P. M. Smisson
  • Patent number: 5480561
    Abstract: An improved method and apparatus for treating wastewater in a recirculating filter is disclosed. Solids are removed from the wastewater by gravitational separation and the wastewater is flowed to a tank. At least a portion of the wastewater is flowed from the tank to a filter comprised of filter media and flowed through the media to produce a filtrate. The amount of wastewater in the tank is sensed. When the amount of wastewater sensed is at least a predetermined amount, a fraction, less than all but more than none, of the filtrate is returned to the tank. When the amount of wastewater is less than the predetermined amount, more than the fraction of filtrate is returned to the tank by decreasing resistance to flow of the filtrate to the tank. The apparatus includes a tank and a filter interconnected by a conduit for conducting liquid from the tank to the filter. A conduit assembly interconnects a filter outlet and a discharge conduit for conducting liquid from the filter to the discharge conduit.
    Type: Grant
    Filed: June 28, 1994
    Date of Patent: January 2, 1996
    Assignee: Orenco Systems, Inc.
    Inventors: Harold L. Ball, Eric S. Ball, Jeffrey L. Ball, Terry R. Bounds
  • Patent number: 5433853
    Abstract: The present invention provides for a novel method of removing emulsified oils, dissolved solids and particulates from a water containing liquid wastestream comprising chemically treating the wastestream with an acid, a coagulant, and a flocculant and subsequently flowing such treated wastestream upwardly through a vertical plate pack chamber.
    Type: Grant
    Filed: October 22, 1993
    Date of Patent: July 18, 1995
    Assignee: Polybac Corporation
    Inventor: Anthony M. Mamone
  • Patent number: 5425882
    Abstract: The invention relates to an apparatus for removing dirt particles (with and without oil deposition) from water or from waste water without free oil, in particular waste water which occurs in commercial laundries after the washing of garments, work clothes and the like. It includes a closeable tank (10) which has an inflow opening (11) and at the bottom a sieve drain (12, 13), and in the interior above the drain a layer of textiles is provided which contains in particular used garments as filter.
    Type: Grant
    Filed: November 20, 1992
    Date of Patent: June 20, 1995
    Assignee: Boco GmbH & Co.
    Inventor: Reinhard Wolk
  • Patent number: 5422019
    Abstract: Water-based industrial cleaning solutions are stripped of mixed oil and high density particulate (dirt) contamination by a full or partial flow system through, first, a centrifugal separator to produce two effluent flow streams respective to low and high density contamination. Each centrifugal separator effluent stream is conducted to and through respective gravimetric separators producing three effluent streams each. The two purified cleaning solution streams are combined for recycling. The two oil effluent streams are combined for disposal. The two particulate dominated streams are combined for screen or matrix filtration.A small side stream such as effluent from the screen or filter is treated with ozone for bacterial control prior to recombination.
    Type: Grant
    Filed: February 23, 1994
    Date of Patent: June 6, 1995
    Inventor: Lyle Carman
  • Patent number: 5407584
    Abstract: A method for clarifying a contaminated fluid in a main separator vessel having therein a cyclonic flow chamber. A spiral preliminary spinner introduces the contaminated fluid to be separated in a stratified condition into the cyclonic flow chamber by a tangential inlet so as to establish a swirling body of fluid; the cyclonic flow chamber has concentric shells positioned below the tangential inlet for discharging separated solids to a collection area and separating an oil and water mixture into a fluid flow zone formed by the cyclonic flow chamber and the wall of the separator vessel wherein water and oil are separated by aeration provided by eductors; a vertical outlet port discharges separated oil and gas from the upper portion of the cyclonic flow chamber to a fluid flow zone wherein oil and gas are separated. The separated water, oil, gas and solids are removed through discharge ports.
    Type: Grant
    Filed: September 20, 1993
    Date of Patent: April 18, 1995
    Inventor: Paul C. Broussard, Sr.
  • Patent number: 5401404
    Abstract: A method and materials for separating oil from water, using stacked disks to coalesce the oil, is disclosed. The method of coalescence allows configuration of systems which are compact, efficient, adaptable to modular configuration, and have a very high flow rate.
    Type: Grant
    Filed: January 21, 1993
    Date of Patent: March 28, 1995
    Inventor: Richard Strauss
  • Patent number: 5391304
    Abstract: A method for purifying a hydrocarbon fluid comprising residual hydrocarbons or a blend of residual hydrocarbons with distilled hydrocarbons, to be used as fuel for a diesel engine or a gas turbine, the hydrocarbon fluid containing contaminants colloidally dispersed as stable micelles, the method comprising the following steps, in sequence: (a) disrupting colloidal structure of the micelles by heating the hydrocarbon fluid under pressure to a temperature of at least 110.degree. C.
    Type: Grant
    Filed: September 2, 1992
    Date of Patent: February 21, 1995
    Inventor: Federico E. Lantos
  • Patent number: 5388542
    Abstract: A ship typically is constructed with an outer hull, and an inner hull which defines the usable space of the ship. Between the outer hull, and the inner hull, the ship will generally have a low point, or bilge, for collection of any water which gets onto the ship. Therefore, one of the chambers of the ship can preferably be outfitted with processing equipment for cleaning the bilge water. The apparatus and associated method for cleaning the bilge water generally involves at least a gravity separation in a gravity separation chamber to separate at least some oil from the bilge water. Since a gravity separation is generally not sufficient to produce environmentally safe water, the ship can also be equipped with a further filtering arrangement for further processing of the bilge water.
    Type: Grant
    Filed: September 23, 1993
    Date of Patent: February 14, 1995
    Assignee: Blohm + Voss AG
    Inventors: Frank Fischer, Knut Drohula, Harm Luneburg