Utilizing Heat From Exhaust Gases Patents (Class 48/102A)
  • Patent number: 6089859
    Abstract: A burner apparatus for reducing carbon production, comprises a burner having a combustion chamber and a heat exchanger located within the combustion chamber. The heat exchanger has an inlet end where a mixture comprising air and fuel enters, a heat transfer section, and an outlet end from which a process mixture of air and fuel discharges into the combustion chamber and is ignited to produce a product mixture. The inlet end and outlet end are located such that the general flow direction of the air and fuel within at least a portion of the heat transfer section is substantially parallel with flow direction of the product mixture in the combustion chamber. The heat transfer section is located within the combustion chamber so as to receive thermal input from the combusted product mixture therein to heat the process mixture to a temperature sufficiently high to substantially reduce the production of solid carbon therein. The invention is also for a method for reducing carbon production.
    Type: Grant
    Filed: January 29, 1999
    Date of Patent: July 18, 2000
    Assignee: Hydrogen Burner Technology, Inc.
    Inventors: Leonard Greiner, Richard Woods
  • Patent number: 6039774
    Abstract: A self-sustaining system for converting organic waste feedstreams into usable solid and gas end products includes a plurality of interconnected retorts, an apparatus for flash pyrolyzing the feedstream to form intermediate gas and solid products, a source for introducing a water spray to refine and cool the intermediate products, a device for separating the gas product from the solid product and a device for regenerating, and thereby further refining, the solid product. In a self-sustaining process, wastes which would otherwise be landfilled are converted to an activated carbon product and a combustible gas mixture of hydrogen, carbon monoxide, and lower hydrocarbons.
    Type: Grant
    Filed: December 26, 1996
    Date of Patent: March 21, 2000
    Inventors: Frederick G. McMullen, Dillon G. McMullen, Roger B. McMullen
  • Patent number: 5824121
    Abstract: A gasification reactor has a mixing tube above it in a common pressure vessel and the mixing tube is provided with a gas cooling heat exchanger. A driving gas feeder draws a portion of the mixture of quenching gas and raw gas from the mixing tube, passes it through the gas cooling heat exchanger and feeds it as a quenching gas to the raw gas at the inlet side of the mixing tube. At least one further heat exchanger in the same pressure vessel or in another pressure vessel, receives the mixture of raw and quenching gas beyond the mixing tube.
    Type: Grant
    Filed: September 20, 1995
    Date of Patent: October 20, 1998
    Assignee: Krupp Koppers GmbH
    Inventor: Johannes Kowoll
  • Patent number: 5529484
    Abstract: Apparatus is disclosed herein for reducing engine nitrogen oxide emissions by mixing hydrogen prepared from a portion or all of engine fuel within a simple burner. The apparatus includes an insulated burner having an internal combustion chamber for receiving either a portion of or all the gaseous fuel or liquid fuel for mixture with air and subsequent ignition by a spark plug. The chamber is within a feed preheater assembly. A mixing chamber is included having a series of baffles against which injected air and fuel vapor impinge causing thorough and complete air/fuel blending into a mixture subsequently ignited and burned, and then discharged into the combustion chamber of the engine itself. The pre-heating assembly raises the temperature of the incoming air/fuel mixture via a heat exchanging process with post combusted gases from the combustion chamber.
    Type: Grant
    Filed: May 15, 1995
    Date of Patent: June 25, 1996
    Inventors: David M. Moard, Leonard Greiner
  • Patent number: 5441546
    Abstract: Apparatus is disclosed herein for reducing engine nitrogen oxide emissions by mixing hydrogen prepared from a portion or all of engine fuel within a simple burner. The apparatus includes an insulated burner having an internal combustion chamber for receiving either a portion of or all the gaseous fuel or liquid fuel for mixture with air and subsequent ignition by a spark plug. The chamber is within a feed preheater assembly. A mixing chamber is included having a series of baffles against which injected air and fuel vapor impinge causing thorough and complete air/fuel blending into a mixture subsequently ignited and burned, and then discharged into the combustion chamber of the engine itself. The pre-heating assembly raises the temperature of the incoming air/fuel mixture via a heat exchanging process with post combusted gases from the combustion chamber.
    Type: Grant
    Filed: November 8, 1993
    Date of Patent: August 15, 1995
    Inventors: David Moard, Leonard Greiner
  • Patent number: 5437123
    Abstract: Injectors are disclosed for use in an underoxidized burner having a single or double stage internal combustion chamber for receiving gaseous or liquid fuel such as diesel for mixture with air or oxygen and subsequent ignition by a spark plug. The injector includes feed conduits or tubes for simultaneously conducting air and fuel to a mixing device having a baffle arrangement against which separately injected air and fuel impinge causing a complete air/fuel blending which is ignited, burned and exhausted. The injector may accept effluent gases for mixing with water to produce maximum hydrogen H.sub.2 from fuels. A lamina flow is produced which is folded over and reversed in direction within the combustion chamber.
    Type: Grant
    Filed: September 20, 1994
    Date of Patent: August 1, 1995
    Inventors: Leonard Greiner, David M. Moard, Bharat Bhatt
  • Patent number: 5002481
    Abstract: Production of oxides of nitrogen during combustion of liquid fuel can be reduced by burning at relatively low temperatures of about 1400.degree. C., by first producing a special combustible gaseous mixture of superheated steam, fuel vapor, and combustion air. Water is fed (9) to the apparatus in quantities of about 2 to 4 parts for each part of fuel (10). Then the fuel is vaporized (8) in a stream of the superheated steam. This avoids fuel cracking and formation of long-chain hydrocarbons. Preheated air (13,14,15) is added (17) in slightly over stoichiometric proportions. The resulting mixture is burned (2) and the hot effluent is used to heat the evaporator (6,7,8) and the air preheating chamber (15), with a bypass (20) equipped with a throttle (22) being used for regulation of evaporator temperature. For start-up, an external hot air source (23) or electric heat (24) can be used. The remaining heat in the effluent can be captured in a conventional heat exchanger.
    Type: Grant
    Filed: February 16, 1989
    Date of Patent: March 26, 1991
    Assignee: Forschungszentrum Julich GmbH
    Inventor: Siegfried Forster
  • Patent number: 4737161
    Abstract: The device catalytically reforms a raw hydrocarbon fuel to a hydrogen rich gas for fueling a fuel cell stack. The device is compact so as to be usable in mobile or temporary applications, such as in vehicles, trailors, as an emergency generator or the like. The device has generally cylindrical housing with an axial burner and a helical catalyst tube outside of the burner and inside of the housing. A refractory heat shield sleeve is interposed between the burner and the helical tube so that heat from the burner progresses to one end of the housing and then passes between the heat shield and housing side wall to envelop the catalyst tube. A gas deflector and swirler may be disposed at the end of the heat shield to properly direct the hot gases from the burner to the catalyst tube. Raw fuel is percolated through the catalyst tube and converted therein to a hydrogen rich gaseous fuel.
    Type: Grant
    Filed: January 27, 1987
    Date of Patent: April 12, 1988
    Assignee: International Fuel Cells Corporation
    Inventors: Donald F. Szydlowski, George T. Suljak
  • Patent number: 4588659
    Abstract: A vaporizer for converting liquid fuel into fuel vapor wherein an annular chamber defined by inner and outer walls is provided and wherein rings are situated one after the other along the length of the chamber, each ring extending around the circumference of the chamber in contact with the inner and outer walls and including a passageway for conveying fluid and/or vapor between the liquid/vapor flow spaces situated on opposite sides of the ring.
    Type: Grant
    Filed: December 11, 1984
    Date of Patent: May 13, 1986
    Assignee: Energy Research Corporation
    Inventors: Sandors G. Abens, William Keil
  • Patent number: 4256060
    Abstract: The manifold hydrogen generator units for automotive I. C. engines are intended to provide a supplementary hydrogen fuel supply for conventional automotive I. C. engines, in addition to any primary fuel including gasoline, gasohol or hydrogen.The hydrogen is produced in a three stage process starting with the conversion of water to steam by means of multiple coils of copper tubing closely fitted to the exhaust manifold(s) of the I. C. engine. The steam is directed into one or two reactor cylinders containing rotating wire brushes axially disposed within the reactor cylinder(s) which remove a portion of the oxygen through progressive oxidation of the iron wire brushes. Periodic forced purging of the wire brushes is provided by combined aeration and vibrating of the rotating brushes.A final reforming stage of the partially reformed steam/hydrogen flow is obtained by steel wool packs which are periodically replaced.
    Type: Grant
    Filed: August 13, 1979
    Date of Patent: March 17, 1981
    Inventor: Donald A. Kelly
  • Patent number: 4150954
    Abstract: A split gas generator, especially for an air-compressing internal combustion engine of a motor vehicle, in which a catalyst supporting the split gas reaction is arranged in a container; the components of the split gas production flow through the catalyst in the longitudinal direction, while air-guide channels embedded in the catalyst are traversed by the exhaust gases and by the fresh air in a direction opposite to the direction of the split gas flow in the catalyst; the air-guide channels are in heat-transferring connection with the catalyst.
    Type: Grant
    Filed: November 16, 1977
    Date of Patent: April 24, 1979
    Assignee: Daimler-Benz Aktiengesellschaft
    Inventors: Joerg Abthoff, Hans-Dieter Schuster, Rolf Gabler
  • Patent number: 4145998
    Abstract: A hot fuel gas generator for an internal combustion engine simultaneously vaporizes gasoline and water in a multi-chambered heated pressure vessel having built in regulators for controlling pressure and volume and delivers the resulting superheated steam and gaseous fuel to the internal combustion engine downstream from the usual carburetor. A single device operating at a very high temperature, for example 1600.degree. F., is used for the simultaneous vaporization of the fuel and water to develop desirable working pressure and volume. The high temperature steam and gaseous fuel positions the fuel molecules at the greatest degree of separation from each other providing the greatest opportunity for contact of the oxygen, the reacting species in the gaseous condition as chemical reactions occur only between particles at the atomic or molecular level and it is necessary for the reacting species to be in actual contact at the time of reaction.
    Type: Grant
    Filed: January 24, 1977
    Date of Patent: March 27, 1979
    Assignee: Econo Fuel Systems, Inc.
    Inventors: Fred G. Mahoney, Webster B. Harpman
  • Patent number: 4114566
    Abstract: A hot fuel gas generator for an internal combustion engine simultaneously vaporizes gasoline and water in a multi-chambered heated pressure vessel having built in regulators for controlling pressure and volume and delivers the resulting superheated steam and gaseous fuel to the internal combustion engine downstream from the usual carburetor. A single device operating at a very high temperature, for example 1800.degree. F., is used for the simultaneous vaporization of the fuel and water to develop desirable working pressure and volume. The high temperature steam and gaseous fuel positions the fuel molecules at the greatest degree of separation from each other providing the greatest opportunity for contact of the oxygen, the reacting species in the gaseous condition as chemical reactions occur only between particles at the atomic or molecular level and it is necessary for the reacting species to be in actual contact at the time of reaction.
    Type: Grant
    Filed: April 27, 1977
    Date of Patent: September 19, 1978
    Assignee: Econo Fuel Systems, Inc.
    Inventors: Webster B. Harpman, Fred G. Mahoney
  • Patent number: 4112889
    Abstract: A fuel system for an internal combustion engine of the piston type vaporizes a liquid fuel and water and mixes the resulting gaseous fuel and water vapor with air in a metering valve which communicates with the internal combustion engine. A device operating at a very high temperature, for example 1800.degree. F. is used in the vaporization of the fuel. The high temperature gaseous state of the fuel represents molecules of the greatest degree of separation from each other providing the greatest opportunity for contact of the reacting species in the gaseous condition as chemical reactions occur only between particles at the atomic or molecular level and it is necessary for the reacting species to be in actual contact at the time of reaction. The fuel system therefore enables complete combustion and the elimination of the atmospheric pollutants common in the operation of internal combustion engines.
    Type: Grant
    Filed: November 26, 1976
    Date of Patent: September 12, 1978
    Assignee: Energy Research Inc.
    Inventor: Webster B. Harpman
  • Patent number: 4059076
    Abstract: A hydrocarbon fuel is subjected to combustion in an internal combustion engine by the use of excess air, and the exhaust gas is utilized as heat and oxygen sources for partial oxidation of the hydrocarbon fuel in a separate reformer. A resulting mixture of the reformed gas and the exhaust gas is subjected to heat exchange with air to be drawn into the engine and/or the fuel to be supplied to the reformer and thereafter is supplied to a larger internal combustion engine.
    Type: Grant
    Filed: April 13, 1976
    Date of Patent: November 22, 1977
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Katuaki Kosaka, Zene Ueno
  • Patent number: 4050419
    Abstract: A hot fuel gas generator for an internal combustion engine vaporizes gasoline and water in a heated pressure vessel and mixes the resulting superheated gaseous fuel with air in a metering valve which communicates with the internal combustion engine. A single device operating at a very high temperature, for example 1000.degree. F., is used for the simultaneous vaporization of the fuel and water to develop desirable working pressure and volume. The high temperature gaseous state of the fuel represents molecules at the greatest degree of separation from each other providing the greatest opportunity for contact of the reacting species in the gaseous condition as chemical reactions occur only between particles at the atomic or molecular level and it is necessary for the reacting species to be in actual contact at the time of reaction. The fuel gas produced therefore enables complete combustion and the elimination of the atmospheric pollutants common in the operation of internal combustion engines.
    Type: Grant
    Filed: October 24, 1975
    Date of Patent: September 27, 1977
    Assignee: Econo Fuel Systems, Inc.
    Inventors: Webster B. Harpman, Fred G. Mahoney
  • Patent number: 4046522
    Abstract: A pre-engine catalytic converter for use with fuels which are mixtures of hydrocarbons and oxygenated organic compounds, such as alcohols, ethers and ketones, convertible to carbon monoxide and H.sub.2. The converter comprises two catalyst beds arranged in series, the first containing a catalyst suitable for the decomposition of organic oxygenates to CO and H.sub.2 and the second containing a cracking catalyst of the ZSM-5 zeolite type to convert the liquid hydrocarbon fuel to gaseous hydrocarbon fuel. Energy is extracted from the engine exhaust by heat exchange and utilized to support the catalytic reactions whereby the heating value and the octane rating of the fuel are increased. The performance and fuel economy of the engine are substantially improved.
    Type: Grant
    Filed: June 25, 1976
    Date of Patent: September 6, 1977
    Assignee: Mobil Oil Corporation
    Inventors: Nai Yuen Chen, Heinz Heinemann
  • Patent number: 4033133
    Abstract: A hydrogen generator provides hydrogen rich product gases which are mixed with the fuel being supplied to an internal combustion engine for the purpose of enabling a very lean mixture of that fuel to be used, whereby nitrous oxides emitted by the engine are minimized. The hydrogen generator contains a catalyst which must be heated to a pre-determined temperature before it can react properly. To simplify the process of heating up the catalyst at start-up time, either some of the energy produced by the engine such as engine exhaust gas, or electrical energy produced by the engine, or the engine exhaust gas may be used to heat up air which is then used to heat the catalyst.
    Type: Grant
    Filed: March 22, 1976
    Date of Patent: July 5, 1977
    Assignee: California Institute of Technology
    Inventors: John Houseman, Donald J. Cerini
  • Patent number: 4023538
    Abstract: A hot fuel gas generator for an internal combustion engine simultaneously vaporizes gasoline and water in a multi-chambered heated pressure vessel having built in regulators for controlling pressure and volume and delivers the resulting superheated steam and gaseous fuel to the internal combustion engine downstream from the usual carburetor. A single device operating at a very high temperature, for example 1600.degree. F., is used for the simultaneous vaporization of the fuel and water to develop desirable working pressure and volume. The high temperature steam and gaseous fuel positions the fuel molecules at the greatest degree of separation from each other providing the greatest opportunity for contact of the oxygen, the reacting species in the gaseous condition as chemical reactions occur only between particles at the atomic or molecular level and it is necessary for the reacting species to be in actual contact at the time of reaction.
    Type: Grant
    Filed: July 30, 1976
    Date of Patent: May 17, 1977
    Assignee: Econo Fuel Systems, Inc.
    Inventors: Webster B. Harpman, Fred G. Mahoney