Distinct Exhaust Products Line Heats Feed Line Patents (Class 431/215)
  • Publication number: 20040191709
    Abstract: A NOx removal system for a furnace or boiler with an economizer has two separate ammonia injection grids (AIG) upstream of an SCR. A primary AIG is positioned adjacent the flue gas outlet of the economizer and upstream of an economizer bypass outlet. A secondary AIG is located within an economizer flue gas bypass. The separate AIGs permit a reduction in the overall length of the flue between the economizer and SCR, thereby reducing the NOx removal system footprint, cost and quantity of materials.
    Type: Application
    Filed: March 26, 2003
    Publication date: September 30, 2004
    Inventors: Eric S. Miller, Bradley W. Kissel, Kevin J. Rogers
  • Patent number: 6793486
    Abstract: A burner for non-symmetrical combustion generally includes a burner housing enclosing a burner plenum. A fuel conduit extends within the housing and is positioned coaxial with a line spaced from a central axis of the burner. The fuel conduit defines a fuel exit opening. A baffle defining an air conduit extends longitudinally within the housing. The air conduit has an air opening on an opposite side of the burner central axis from the fuel exit opening. At least one oxygen injection lance extends longitudinally within the housing and partially through the air conduit. A burner port block is located adjacent to the baffle and downstream of the air opening, and is in fluid communication with the fuel conduit and the air conduit.
    Type: Grant
    Filed: December 28, 2001
    Date of Patent: September 21, 2004
    Assignee: Bloom Engineering Company, Inc.
    Inventors: Harry P. Finke, Gregory T. Kitko, Marty R. McGhee, David G. Schalles
  • Patent number: 6776610
    Abstract: A gas burner in which a burner head is positioned within an inner pipe that is surrounded by an outer protective pipe. Fuel is delivered to the burner head through a fuel conduit positioned within the inner pipe, and combustion air is delivered through the inner pipe. The fuel conduit terminates short of the burner head and the wall of that conduit is provided with a plurality of holes. A further pipe surrounds at least the perforated part of the fuel conduit, and one end of the further pipe extends to the the burner head while the other end is sealed against the fuel conduit to form a mixing chamber between the outside of the fuel conduit and the inside of the further pipe. A second conduit is provided to conduct a given amount of air to the mixing chamber.
    Type: Grant
    Filed: September 18, 2003
    Date of Patent: August 17, 2004
    Assignee: Sandvik AB
    Inventors: Hans Lövgren, Thomas Lewin
  • Publication number: 20040091830
    Abstract: A device including a burner (6) for directing a fuel/air mixture into a reaction chamber (2) for flameless oxidation of fuels has a reaction chamber (2), which is supplied with a fuel air mixture by a burner (6). The burner (6) discharges the a fuel air fuel/air jet transversely to it's a longitudinal axis (A) of the burner and an. An exhaust gas channel (17) is arranged in or on the burner concentric or parallel to the burner longitudinal axis (A). The An outlet direction (R) of the fuel/air jets from the burner and the direction (A) of the exhaust gas channel cross each other. This Hence, produces the burners, which fuel introduces the fuel parallel or at an angle to the furnace wall into the furnace chamber in where the burner is mounted and are designed for flameless oxidation of the fuel.
    Type: Application
    Filed: April 17, 2003
    Publication date: May 13, 2004
    Applicant: WS Warmeprozesstechnik GmbH
    Inventors: Joachim G. Wunning, Joachim A. Wunning
  • Publication number: 20040086816
    Abstract: A gas to liquid converter to convert liquids (1) to gas (2) that can include a liquid pressurization element (3), a liquid preheating element (5), and a nozzle (10) to disperse liquids into energy (7) generated by an energy source (8). The gas to liquid converter can be located inside an enclosure (17) and substances dissolved in the liquid can accumulate as solids (13) on deposition surface (12) of the enclosure as the liquid (1) converts to gas (2). Condesation of a portion of the gas (2) generated can be combined with the solids (13) for continuous removal of such solids (13) from the enclosure (17). A gas expansion compensator can generate a pressure gradient (24) to move the volume of gas generated from the liquid from the enclosure (17).
    Type: Application
    Filed: October 27, 2003
    Publication date: May 6, 2004
    Applicant: Western Pump & Dredge, Inc
    Inventors: Herbie Jack Hays, William Merle Hays, Arturo Quezada
  • Patent number: 6702570
    Abstract: A method of firing a heat consuming device such as a boiler or furnace in which an oxygen transport membrane is integrated with the device such that part of the permeated oxygen supports an initial combustion to heat the incoming air to the oxygen transport membrane system. A remaining portion of the oxygen after having been diluted with flue gases from the boiler supports a secondary combustion of fuel within the heat consuming device.
    Type: Grant
    Filed: June 28, 2002
    Date of Patent: March 9, 2004
    Assignee: Praxair Technology Inc.
    Inventors: Minish Mahendra Shah, Lawrence E. Bool, III, David Richard Thompson, Christian Friedrich Gottzmann, Hisashi Kobayashi
  • Publication number: 20040023180
    Abstract: In an alumina honeycomb structural body according to a first aspect of the invention and another invention relating it, the alumina honeycomb structural body is constructed in such a manner that alumina is a main ingredient and an amount of impurities is limited to not greater than 2 weight %. Moreover, in an alumina honeycomb structural body according to a second aspect of the invention and another invention relating it, the alumina honeycomb structural body is constructed in such a manner that an amount of alumina as a main ingredient is limited to not less than 98 weight %; an amount of Na containing compound is limited to 0.02 weight %-1.0 weight % of Na2O when converting it into oxide; and remainder is impurities.
    Type: Application
    Filed: June 18, 2003
    Publication date: February 5, 2004
    Inventors: Yoshiyuki Kasai, Takashi Harada, Kazuhiko Umehara, Isao Mori, Masayasu Nagoshi, Takeshi Tada
  • Publication number: 20040002029
    Abstract: A boiler system includes combustion air conduit for directing the flow of combustion air through a first air heater (e.g., A-side heater) to a boiler and flue gas conduit for directing the flow of flue gas generated by the boiler to a second air heater (e.g., B-side heater). The combustion air conduit is configured to direct the majority of the combustion air to the first air heater, and the flue gas conduit is configured to direct the majority of the flue gas from the boiler to the second air heater.
    Type: Application
    Filed: June 28, 2002
    Publication date: January 1, 2004
    Applicant: PPL Corporation
    Inventor: Peter E. Giella
  • Publication number: 20030175645
    Abstract: System for reducing NOx emissions from burners of furnaces such as those used in steam cracking. The system includes a furnace having at least one burner, the at least one burner including a primary air chamber; a burner tube including a downstream end, an upstream end in fluid communication with the primary air chamber for receiving air, flue gas or mixtures thereof and fuel, a venturi portion positioned between the downstream end and the upstream end, and a burner tip mounted on the downstream end of the burner tube adjacent the first opening in the furnace for combusting the fuel downstream of the burner tip; and a fuel orifice located adjacent the upstream end of the burner tube for introducing fuel into the burner tube; a source of flue gas, said source positioned so as to enable the flue gas to achieve a temperature of less than 2000° F.
    Type: Application
    Filed: March 14, 2003
    Publication date: September 18, 2003
    Inventor: George Stephens
  • Patent number: 6612833
    Abstract: A regenerative post-combustion apparatus (1) in a housing (2) in a known manner comprises from top to bottom a combustion chamber (8), a heat exchanger area (7) subdivided into a plurality of segments filled with heat exchanger material, and a rotating distributor (5). The latter depending on its rotational position establishes a connection, on the one hand, between an inlet (3) for waste gas to be cleaned and at least one first segment of the heat exchanger area (7), as well as between at least one second segment of the heat exchanger area (7) and an outlet (10) for cleaned gas. Disposed above the rotating distributor (5) is a burn-out rotary slide valve (31). The latter is subdivided by dividing walls into segments, of which one is closed in the direction of the rotating distributor (5) and communicates with an outlet (68). The other segments of the burn-out rotary slide valve (31) are open in a downward and an upward direction.
    Type: Grant
    Filed: May 31, 2001
    Date of Patent: September 2, 2003
    Assignee: Eisenmann Maschinenbau KG
    Inventor: Walter Pötzl
  • Patent number: 6588416
    Abstract: The invention relates to a radiant device with a burner of the “glove finger” type, comprising an exchanger (3) for heating air (T1) by the burned gases (T2), a furnace tube (6) drilled with air-intake orifices (60) and terminated by a nozzle (61) disposed facing a recirculation tube (4), and a central gas-injection tube (7). According to the invention, the central injection tube (7) is fed with gaseous fluids in proportions that can be regulated by means of one or two valves (710, 720), via two conduits (71, 72), the first (71) of which transports at least gas and the second (72) of which transports at least air, and the central injection tube (7) ends at a burner (8), which is disposed in the furnace tube (6) and which discharges at the level of the nozzle (61), this arrangement making it possible to adapt existing devices very easily for the purpose of reduced production of nitrogen oxides.
    Type: Grant
    Filed: June 11, 2002
    Date of Patent: July 8, 2003
    Assignee: Gaz de France (GDF) Service National
    Inventors: Thierry Landais, Thierry Bellin-Croyat
  • Patent number: 6547555
    Abstract: In a regenerator made of materials each comprising alumina as a main ingredient, and used for the regenerative combustion burner which is fired with alternately and repeatedly operations of heat storage by the passage of high-temperature flue gas in a fixed time and heating of combustion air by passage of the combustion air in a next fixed time, under the condition that the flue gas includes metal dust; the alumina purities in the materials for the regenerator are lowered in the order, the high-temperature, medium-temperature and low-temperature parts of the regenerator.
    Type: Grant
    Filed: May 10, 2002
    Date of Patent: April 15, 2003
    Assignees: NKK Corporation, Nippon Furnace Kogyo Kaisha, Ltd., NGK Insulators, Ltd.
    Inventors: Isao Mori, Yutaka Suzukawa, Jun Sudo, Yoshiyuki Kasai
  • Patent number: 6540505
    Abstract: A burner for liquid fuel has an electric heating device for start up heating a fuel vaporization chamber to a selected temperature, a flame retention baffle being fitted on the vaporization chamber with a temperature sensor sensing temperature of the vaporization. When the vaporization chamber is heated to a desired temperature of about 350 degrees celsius by deflected hot exhaust gas products from the burner operation and such temperature is sensed, the sensor outputs a signal so that the electric heating device can be shut down, vaporization chamber heating then being maintained by the deflected hot exhaust gas flow.
    Type: Grant
    Filed: March 1, 2001
    Date of Patent: April 1, 2003
    Assignee: Toby AG
    Inventors: Josef Wuest, Heinz Steiner
  • Patent number: 6524096
    Abstract: A high-temperature burner is provided that is suited for the incineration of shredded plastics, tires, carpet or similar materials. The burner walls are protected from the heat of the ongoing combustion reaction by an annular curtain of water vapor or carbon dioxide that takes the radiant heat energy of the high-temperature combustion reaction. The annular curtain removes the heat energy from the vicinity of the burner walls before the energy can be conveyed to them. Higher temperature combustion can be attained without resorting to jacketed burner construction or the use of refractory materials.
    Type: Grant
    Filed: January 5, 2001
    Date of Patent: February 25, 2003
    Inventor: Vincent R. Pribish
  • Publication number: 20030008255
    Abstract: A burner for non-symmetrical combustion generally includes a burner housing enclosing a burner plenum. A fuel conduit extends within the housing and is positioned coaxial with a line spaced from a central axis of the burner. The fuel conduit defines a fuel exit opening. A baffle defining an air conduit extends longitudinally within the housing. The air conduit has an air opening on an opposite side of the burner central axis from the fuel exit opening. At least one oxygen injection lance extends longitudinally within the housing and partially through the air conduit. A burner port block is located adjacent to the baffle and downstream of the air opening, and is in fluid communication with the fuel conduit and the air conduit.
    Type: Application
    Filed: December 28, 2001
    Publication date: January 9, 2003
    Inventors: Harry P. Finke, Gregory T. Kitko, Marty R. McGhee, David G. Schalles
  • Publication number: 20020192614
    Abstract: In a regenerator made of materials each comprising alumina as a main ingredient, and used for the regenerative combustion burner which is fired with alternately and repeatedly operations of heat storage by the passage of high-temperature flue gas in a fixed time and heating of combustion air by passage of the combustion air in a next fixed time, under the condition that the flue gas includes metal dust;
    Type: Application
    Filed: May 10, 2002
    Publication date: December 19, 2002
    Inventors: Isao Mori, Yutaka Suzukawa, Jun Sudo, Yoshiyuki Kasai
  • Patent number: 6488076
    Abstract: A heating apparatus for heating supply of gaseous fluid 1 heats a relatively low temperature gaseous fluid and feeds a heated supply flow to a high temperature gaseous fluid introduction equipment. The heating apparatus has heat exchangers 11, 12 provided with fluid passages through which the low temperature fluid flow passes, a splitting area 15 for dividing a heated supply flow H of gaseous fluid, which is heated by the heat exchanger, into first and second heated gaseous streams H1, H2, and combustion areas 13, 14 in which a combustion reaction of combustible matter takes place in the existence of the first heated gaseous stream. The heated supply flow or the first stream is introduced into the combustion area and the combustible matter is fed thereto, and the combustion area causes the combustion reaction of combustible matter in the existence of the heated supply flow or the first stream. Hot gas produced by the combustion reaction is exhausted through the heat exchanger.
    Type: Grant
    Filed: July 6, 1999
    Date of Patent: December 3, 2002
    Assignee: Nippon Furnace Kogyo Kaisha, Ltd.
    Inventors: Tsutomu Yasuda, Kunio Yoshikawa
  • Patent number: 6471508
    Abstract: A burner for non-symmetrical combustion includes a burner housing enclosing a burner plenum. A fuel conduit extends longitudinally within the housing and is positioned coaxial with a line spaced from a central axis of the burner. The fuel conduit defines a fuel exit opening. An air conduit extends into the housing and defines an air opening on an opposite side of the burner central axis from the fuel exit opening. The air opening is positioned a greater distance away from the burner central axis than the fuel exit opening. The air conduit has a cross-sectional shape in the form of a segment of a circle. A baffle is positioned at least partially around the fuel conduit and defines the air conduit. A burner port block is connected to the baffle downstream of the fuel exit opening. The burner port block has a sidewall diverging from the burner central axis.
    Type: Grant
    Filed: August 29, 2001
    Date of Patent: October 29, 2002
    Assignee: Bloom Engineering Company, Inc.
    Inventors: Harry P. Finke, Martin R. McGhee, Gregory T. Kitko
  • Patent number: 6461148
    Abstract: A burner, particularly for use in thermophotovoltaic (TPV) applications, is provided having a fuel distribution tube with integrated swirl vanes adjacent exit holes in the sides of the fuel distribution tube, a ceramic burner cap attached the top end of the fuel distribution tube and a liquid fuel being provided through a fuel feed tube protruding through the bottom end of the fuel distribution tube, thereby forming a burner assembly. The burner assembly fits slidably into a cylindrical burner sleeve which forces primary combustion air through a passage formed between the sleeve and the swirl vanes. The primary combustion air mixes with the fuel in the vanes and burner slot formed between the burner cap and sleeve. The fuel feed tube used to supply fuel to the burner is a heated tube having a small orifice at the burner end. The tube is heated using an internal heater that vaporizes the fuel and can also use recuperated heat from the burner combustion process.
    Type: Grant
    Filed: September 28, 2000
    Date of Patent: October 8, 2002
    Assignee: McDermott Technology, Inc.
    Inventors: Mark V. Scotto, Crispin L. DeBellis, Edward D. Daum
  • Publication number: 20020072020
    Abstract: A regenerative burner or heat exchanger has a housing with a removable media bed, which can be removed from the housing for regeneration, replacement or other treatment of the media. A spare media bed can be prepared with new, renovated or otherwise treated media and ready to replace the bed in the heat exchanger with minimal delay. Another heat exchanger housing has a detachable lower section, containing heat exchange media, which can be moved for regeneration, replacement or other treatment of the media.
    Type: Application
    Filed: October 16, 2001
    Publication date: June 13, 2002
    Inventors: John J. Crane, Lowell Newvine, Robert Porter, Edwin L. Rauch, Todd Welling
  • Patent number: 6397766
    Abstract: There are provided an evaporative/regenerative incineration system for organic waste water for incinerating organic waste water and volatile organic compounds completely at low expenses and a method therefor. Waste gas is generated by evaporating waste water including organic compounds in an evaporator and the generated waste gas is mixed with air in a regenerative thermal oxidizer (RTO) in flow communication with the evaporator for oxidation. The heat energy generated from the oxidation is collected and supplied to the evaporator.
    Type: Grant
    Filed: February 21, 2001
    Date of Patent: June 4, 2002
    Assignee: Key Engineering Co., Ltd.
    Inventor: Suk-in Oh
  • Patent number: 6382958
    Abstract: A method and system to separate oxygen from air for producing oxygen to support combustion of a fuel, thereby to produce heat in a heat consuming device. In accordance with the method and system a heated and compressed air stream is introduced into a ceramic membrane system having one or more oxygen-selective, ion conducting membranes to produce an oxygen permeate stream which is used to support combustion of the fuel. The compressed air stream is heated within the heat consuming device itself which can be, for instance, a furnace or a boiler, through indirect heat exchange with flue gases or by radiant heat within a radiant heat exchange zone thereof. An oxygen lean retentate stream, produced through separation of oxygen from the compressed and heated air stream, can be expanded with the performance of work to produce an expanded air stream. The work of expansion can be applied to the compression of the incoming air stream. The expanded air stream can be used to preheat the compressed and heated air stream.
    Type: Grant
    Filed: July 12, 2000
    Date of Patent: May 7, 2002
    Assignee: Praxair Technology, Inc.
    Inventors: Lawrence E. Bool, III, Hisashi Kobayashi
  • Patent number: 6321743
    Abstract: A method and apparatus for combustion of a fuel and oxidant in which at least a portion of a fuel and at least a portion of an oxidant are introduced into an annular region formed by an outer tubular member closed off at one end and an inner tubular member open at both ends concentrically disposed within the outer tubular member, forming a fuel/oxidant mixture. The fuel/oxidant mixture is ignited in the annular region, forming products of combustion therein. The products of combustion are then exhausted through the inner tubular member providing oxidant preheating prior to forming the fuel/oxidant mixture.
    Type: Grant
    Filed: June 29, 2000
    Date of Patent: November 27, 2001
    Assignee: Institute of Gas Technology
    Inventors: Mark J. Khinkis, Harry S. Kurek, Hamid A. Abbasi, Peter T. Wurm
  • Patent number: 6293275
    Abstract: A compact heat source is provided which includes a bell-shaped or conical recuperator that surrounds a combustion chamber. The recuperator consists of parts that are axially tensioned against one another, so that a stable positioning of a partition wall provided with projections both on a bell-shaped outer wall and also on a bell-shaped inner wall is ensured.
    Type: Grant
    Filed: April 28, 2000
    Date of Patent: September 25, 2001
    Inventor: Joachim Wünning
  • Patent number: 6290488
    Abstract: An incinerator with a heat-storage capability is disclosed. The incinerator has a housing with multiple communicating chambers defined therein, heat-storing medium received in each chamber, a heater mounted in the housing, an inlet tube and an outlet tube connecting to all of the chambers respectively, a control valve mounted between the inlet tube or outlet tube and each corresponding chamber and an air pump mounted on the outlet tube. The incinerator can deal with the industrial waste steam by the medium in alternate chambers one after the other, and the medium can absorb the heat generated by burning the volatile organic material in the industrial waste steam. This can increase the thermal efficiency of the incinerator and decrease cost of operating the incinerator.
    Type: Grant
    Filed: January 19, 2000
    Date of Patent: September 18, 2001
    Inventor: Chia-Ching Shu
  • Patent number: 6264464
    Abstract: The present invention relates to one or more heat exchangers in communication with a combustion zone, each heat exchanger containing a matrix of heat exchange media, the matrix having a plurality of defined parallel or substantially parallel flow passages, the matrix being angled slightly above horizontal in the direction towards the combustion zone. The present invention is also directed to a regenerative thermal oxidizer including the one or more heat exchangers containing the angled matrix.
    Type: Grant
    Filed: May 12, 2000
    Date of Patent: July 24, 2001
    Assignee: Megtec Systems, Inc.
    Inventor: Michael P. Bria
  • Patent number: 6264466
    Abstract: An oxygen enrichment system is provided which uses the existing air/fuel burners of a regenerative furnace to distribute additional oxygen to the burners for increased efficiency, and reduced nitrous oxide emissions. The centrally positioned cooling air lances in the burners of a regenerative furnace are modified to deliver oxygen when the burners are firing for oxygen enrichment. During the burner firing cycle, oxygen is delivered from an oxygen supply through the oxygen lance to provide a central oxygen jet. The fuel is delivered concentrically around the oxygen jet. During the non-firing cycle of the burner, cooling air or other cooling fluid is delivered from the cooling air supply through the oxygen jet for cooling the offside of the furnace.
    Type: Grant
    Filed: March 31, 2000
    Date of Patent: July 24, 2001
    Assignee: American Air Liquide, Inc.
    Inventors: Mahendra L. Joshi, Harley A. Borders, Olivier Charon
  • Patent number: 6257868
    Abstract: The invention relates to a method for the combustion of liquid fuel (F), especially oil. Wherein the liquid fuel (F) is distributed by means of a distribution device (1) and directed to a downstream reactor with porous means (6) having a communicating pore volume, whose Pecler number allows for flame expansion and full combustion of the liquid fuel (F) inside the porous means (6).
    Type: Grant
    Filed: July 19, 1999
    Date of Patent: July 10, 2001
    Inventors: Franz Durst, Michael Keppler, Miroslaw Weclas
  • Patent number: 6250916
    Abstract: Apparatus and methods suitable for recovery of heat from hot flue gases are presented comprising primary heat transfer means for exchanging heat between a hot flue gas and an intermediate fluid to create a hot intermediate fluid from an originally cold intermediate fluid; one or more oxidant-fuel burners which create the main flow of hot flue gas, and transport means for transporting the hot intermediate fluid to the heat exchanger means. The apparatus and method of the invention solve the problem of recovery of heat from dirt, toxic, or erosive flue gases.
    Type: Grant
    Filed: April 14, 2000
    Date of Patent: June 26, 2001
    Assignees: American Air Liquide, Inc., L'Air Liquide, Societe Anonyme pour l'Etude et, l'Exploitation des Procedes Georges Claude
    Inventors: Louis C. Philippe, Fabien S. Illy, Eric L. Duchateau
  • Patent number: 6234789
    Abstract: The present invention provides an alternate changeover regenerative burner system suitable for use as a heat source for an industrial furnace and the like where re-increase in temperature is relatively-often carried out; an alternate changeover regenerative burner constituted by a burner 2 having a regenerator 7 and air supply/exhaust switching mechanisms 12 and 13 for switching connection with an air supply system 17 and an exhaust system 16 of the burner 2 is regarded as a module unit; and three or more units of the alternate changeover regenerative burner constitute a combustion system 1; a ratio of the number of the burners 2 performing combustion and the number of the burners 2 being stopped is variable; and combustion is controlled in such a manner that all the units sequentially repeat alternate regenerative combustion with the units forming no fixed pairs.
    Type: Grant
    Filed: March 17, 2000
    Date of Patent: May 22, 2001
    Assignee: Nippon Furnace Kogyo Kabushiki Kaisha
    Inventor: Makoto Miyata
  • Patent number: 6190159
    Abstract: A radiant tube burner assembly and method is provided to reduce nitrous oxides and carbon monoxide emissions in the combustion of hydrocarbon fuels. The burner assembly comprises a burner section, exhaust section, radiant tube, plenum and a jet pump assembly. A volume of exhaust gas drawn from the stream of exhaust gases into the jet pump assembly by way of a motive gas is flowed into a stream of combustion air so as to vitiate the oxygen content of the combustion mixture. When the combustion mixture is combusted with fuel in the burner section, the production of nitrous oxides and other harmful emission is mitigated.
    Type: Grant
    Filed: March 3, 1999
    Date of Patent: February 20, 2001
    Assignee: Hauck Manufacturing Company
    Inventors: Edward E. Moore, Raymond F. Baum, Brian K. Kelly
  • Patent number: 6138662
    Abstract: The invention provides a radiant heater comprising a radiative heating element (15, 16); a housing (1), the underside of which is recessed to receive the radiative heating element (15, 16), the radiative heating element being disposed beneath the housing (1) such that its upper half is wholly within the recess, and at least a portion of its lower half protrudes downwardly from the recess; the recess having a heat reflective surface (5a, 5b, 5c, 6a, 6b, 6c) for reflecting heat radiation from the radiative heating element (15,16) in a downwards direction; the housing (1) having means (9) enabling the attachment thereto of a reflective skirt (19) for focusing the radiation emitted from the radiative heating element (15,16).
    Type: Grant
    Filed: March 28, 1997
    Date of Patent: October 31, 2000
    Assignee: Philomena Joan Jones
    Inventor: David Mervyn Jones
  • Patent number: 6113389
    Abstract: An oxygen enrichment system is provided which uses the existing air/fuel burners of a regenerative furnace to distribute additional oxygen to the burners for increased efficiency, and reduced nitrous oxide emissions. The centrally positioned cooling air lances in the burners of a regenerative furnace are modified to deliver oxygen when the burners are firing for oxygen enrichment. During the burner firing cycle, oxygen is delivered from an oxygen supply through the oxygen lance to provide a central oxygen jet. The fuel is delivered concentrically around the oxygen jet. During the non-firing cycle of the burner, cooling air or other cooling fluid is delivered from the cooling air supply through the oxygen jet for cooling the offside of the furnace.
    Type: Grant
    Filed: June 1, 1999
    Date of Patent: September 5, 2000
    Assignee: American Air Liquide, Inc.
    Inventors: Mahendra L. Joshi, Harley A. Borders, Olivier Charon
  • Patent number: 6102691
    Abstract: A combustion apparatus provided with a burner includes a fuel injection nozzle disposed rearward of a gas passable solid and a pre-mixture region between a downstream end of the solid and the fuel injection nozzle. The gas passable solid may be of a straightener type. Air for combustion includes main air and pilot air separated from each other. The apparatus may be coupled to each end of a radiant tube. The apparatus may be provided to a direct and indirect combustion type thermal facilities.
    Type: Grant
    Filed: September 3, 1999
    Date of Patent: August 15, 2000
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Kazuhisa Mitani, Yukio Fukuta
  • Patent number: 6095798
    Abstract: A combustion apparatus provided with a burner includes a fuel injection nozzle disposed rearward of a gas passable solid and a pre-mixture region between a downstream end of the solid and the fuel injection nozzle. The gas passable solid may be of a straightener type. Air for combustion includes main air and pilot air separated from each other. The apparatus may be coupled to each end of a radiant tube. The apparatus may be provided to a direct and indirect combustion type thermal facilities.
    Type: Grant
    Filed: September 3, 1999
    Date of Patent: August 1, 2000
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Kazuhisa Mitani, Yukio Fukuta
  • 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: 6071116
    Abstract: Apparatus and methods suitable for recovery of heat from hot flue gases are presented comprising primary heat transfer means for exchanging heat between a hot flue gas and an intermediate fluid to create a hot intermediate fluid from an originally cold intermediate fluid; one or more oxidant-fuel burners which create the main flow of hot flue gas, and transport means for transporting the hot intermediate fluid to the heat exchanger means. The apparatus and method of the invention solve the problem of recovery of heat from dirty, toxic, or erosive flue gases.
    Type: Grant
    Filed: April 15, 1997
    Date of Patent: June 6, 2000
    Assignees: American Air Liquide, Inc., L'Air Liquide, Societe Anonyme pour l'Etude et, l'Exploitation des Procedes Georges Claude
    Inventors: Louis C. Philippe, Fabien S. Illy, Eric L. Duchateau
  • Patent number: 6065957
    Abstract: According to the present invention, a catalyst combustion apparatus includes a ring-shaped catalyst body for catalytically burning the mixture of the fuel and the air, which is disposed in a combustion cylinder. In the combustion cylinder, a fuel nozzle and an inlet for the air are disposed at one end side of the catalyst body, and the premixing chamber is formed at the other end side. The fuel and the air are supplied from one end side of the catalyst body through a through-hole formed at a center portion of the catalyst body and is mixed in the premixing chamber. In the premixing chamber, a flow direction of the mixture is turned toward the catalyst body. A part of the exhaust gas is introduced into the air at one end side. In this way, it is possible to simplify and downsize the combustion apparatus, while securing the preheating effect of the air by the circulation of the exhaust gas.
    Type: Grant
    Filed: July 15, 1998
    Date of Patent: May 23, 2000
    Assignee: Denso Corporation
    Inventors: Yasuo Kondo, Shinichi Mashimo, Akio Matsuoka, Masanori Uehara
  • Patent number: 6042371
    Abstract: A combustion apparatus includes a combustion chamber and a single-type regenerative combustion burner. The burner is arranged with respect to the combustion chamber so that a direction in which burnt gas returns to the burner is not opposed to a direction in which fuel and supply air are expelled from the burner. This combustion apparatus is applicable to various types of industrial furnaces including various types of boilers, for example, a crucible-type furnace.
    Type: Grant
    Filed: July 18, 1997
    Date of Patent: March 28, 2000
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Kazuhisa Mitani, Yusei Kusaka, Yukio Fukuta, Tomohiko Nishiyama
  • Patent number: 6036476
    Abstract: A combustion apparatus provided with a burner includes a fuel injection nozzle disposed rearward of a gas passable solid and a pre-mixture region between a downstream end of the solid and the fuel injection nozzle. The gas passable solid may be of a straightener type. Air for combustion includes main air and pilot air separated from each other. The apparatus may be coupled to each end of a radiant tube. The apparatus may be provided to a direct and indirect combustion type thermal facilities.
    Type: Grant
    Filed: April 8, 1997
    Date of Patent: March 14, 2000
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Kazuhisa Mitani, Yukio Fukuta
  • Patent number: 6033207
    Abstract: A combustor for the combustion of fuel gas is described. The fuel gas entering the combustor by an inlet pipeline is a compressed admixture with air of a concentration below the lower explosive limit. The fuel gas/air admixture passes within a tube to pass to the combustion zone where combustion occurs only by reaction/self-combustion. The combusted gas passes by a tortuous path provided by an arrangement of baffles to the outlet duct. The exhausting combusted gas passes over the outer surface of the tube and gives up preheating heat to the inlet gas therein. A gas turbine system for utilizing waste fuel gas also is described that includes a combustor as described that provides combusted fuel to the expansion stage of the turbine.
    Type: Grant
    Filed: April 25, 1997
    Date of Patent: March 7, 2000
    Assignee: Isentropic Systems Ltd.
    Inventor: Donald Ray Cummings
  • Patent number: 6033208
    Abstract: A regenerator burner for particular use in the heating of furnace spaces of industrial furnaces is provided. The regenerator burner includes an outer tube in which a central fuel feed arrangement is provided and a burner head which contains combustion air feed and combustion exhaust gases lead-off arrangements and from which the outer tube extends. Two regenerators each of which can be acted on with combustion air and with combustion exhaust gases are also provided. The two regenerators are arranged in two annular spaces which are coaxial to the fuel feed arrangement and are positioned radially one within the other with the annular spaces extending at least over a portion of their axial length in surrounding relation to the fuel feed arrangement in the outer tube. A nozzle mechanism being allocated to each of the two annular spaces at an end of the regenerator burner opposite the burner head. The nozzle mechanisms are operable alternately as inlet and outlet nozzles.
    Type: Grant
    Filed: September 11, 1998
    Date of Patent: March 7, 2000
    Inventor: Joachim Wunning
  • Patent number: 6029647
    Abstract: A radiant tube assembly comprises a radiant tube having a burner leg, an exhaust leg and a recuperator inside the exhaust leg and in a stream of products of combustion flowing in the exhaust leg. The recuperator has an air intake port at a first end and a mixing baffle at a second, hot end. The mixing baffle causes combustion air and products of combustion to be mixed at the hot end of the recuperator and provided to the burner leg for combustion. The mixing baffle includes a flow director which increases the amount of products of combustion mixed with the combustion air. The mixing baffle can also include a dome-shaped end which extends into the stream of products of combustion for reducing turbulence of the stream of products of combustion flowing in the exhaust leg.
    Type: Grant
    Filed: July 6, 1998
    Date of Patent: February 29, 2000
    Assignee: Bloom Engineering Company, Inc.
    Inventors: Stephen P. Pisano, Harry P. Finke
  • Patent number: 6027333
    Abstract: With respect to a radiant tube burner to be used for heating a heating furnace or the like, to suppress the generation of NOx accompanying combustion, to make the structure thereof fit for a radiant tube burner equipment, to simplify the control of a fuel supply system and an air supply system, and to prevent the coking. Furthermore, to provide a combustion control scheme appropriate to a radiant tube burner. For these purposes, the present invention placed the respective tips of a fuel nozzle, e.g., pilot burner joint-use nozzle (11), and an air throat (13) in the end of a radiant tube (3) and moreover has a combustion air injection port (33) of the air throat (13) provided to be deviated in contact with or near to the inner circumferential wall surface of the radiant tube (3). In addition, a control device (307) for making a burner burn alternately.
    Type: Grant
    Filed: May 23, 1996
    Date of Patent: February 22, 2000
    Assignees: NKK Corporation, Japan & Nippon Furnace Kogyo Kaisha, Ltd.
    Inventors: Yoshiki Fujii, Toshio Ishii, Shunichi Sugiyama, Ryoichi Tanaka, Mamoru Matsuo, Makoto Miyata, Shigeo Kurioka, Hiroaki Sato, Akinori Hokabori, Toshikazu Akiyama
  • Patent number: 6000929
    Abstract: A continuous operation and efficient device used for heat decomposition and purification of a malodorous objective gas is disclosed. The device has large-sized and heavy heat reserving materials in a stationary condition. The objective gas is supplied to a chamber of a rotary distribution valve. From there, the gas is conducted from a guide space through first moving valve ports of a moving valve member and a stationary valve port of a stationary valve member to a plurality of passages. The passages separated by partition plates in a housing and contain therein the heat reserving material (heat exchanger column), a pretreatment material and a catalyst. The gas undergoes endothermic reaction for heat decomposition of the malodorous substances by means of the catalyst and a burner. The objective gas then has its heat exchanged or temperature reduced through the heat reserve material, so that a purified gas is expelled from the stationary valve port and second moving valve ports through a chamber.
    Type: Grant
    Filed: February 20, 1996
    Date of Patent: December 14, 1999
    Assignee: Daikin Industries, Ltd.
    Inventors: Masanori Izumo, Morimasa Watanabe, Hiroshi Mori
  • Patent number: 5997279
    Abstract: A hot fluid generating apparatus includes a combustion chamber, a regenerative combustion burner, a fluid passage formed along a wall structure of the combustion chamber, and a device for causing fluid to flow in the fluid passage. The combustion chamber has a flame radiation heat transfer only as a heat transfer portion. A portion of the wall structure opposite to the burner is utilized as a radiation heat transfer portion. A portion of exhaust gas from the burner is recirculated to the supply air to suppress generation of NOx. A portion of the wall structure close to the burner is formed to be a cone.
    Type: Grant
    Filed: February 19, 1997
    Date of Patent: December 7, 1999
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Kazunari Hosome, Akihiko Iyanaga, Kazuhisa Mitani
  • Patent number: 5944510
    Abstract: A fluid injector for use with a burner having at least a pair of concentric tubes which conduct at least two different fluids via inner and outer passageways to a discharge tip. The passageways having different linear fluid velocity rates which causes the issuing discharge flow of the fluids to constrict causing mixing and combining of the fluids for introducing to a combustion chamber. Protection of the injector from thermal melting or burning is provided by location of the injector within the coils of a feed preheater constituting a heat exchanger.
    Type: Grant
    Filed: November 1, 1996
    Date of Patent: August 31, 1999
    Inventors: Leonard Greiner, David M. Moard
  • Patent number: 5941697
    Abstract: The gas phase exothermic reaction of a feed gas mixture is carried out by providing first and second chambers in fluid communication with one another and each containing a bed of solid heat exchange material and at least one bed of catalyst material, each chamber being selectively operable in cooling and heating modes. The feed gas mixture is introduced into a selected one of the chambers when the selected chamber is in the cooling mode and the other chamber is in the heating mode so that the feed gas mixture flowing through the selected chamber contacts the bed of heat exchange material before contacting the bed of catalyst material, the feed gas mixture being reacted in the catalyst bed to form a gaseous product. The gaseous product is conducted from the selected chamber to the other chamber so that the gaseous product flowing through the other chamber contacts the bed of catalyst material before contacting the bed of heat exchange material.
    Type: Grant
    Filed: December 11, 1996
    Date of Patent: August 24, 1999
    Assignees: La Corporation de L'Ecole Polytechnique Gaz Metropolitain, Company Limited Partnership
    Inventors: Jamai Chaouki, Hristo Sapoundjiev, Christophe Guy, Danilo Klvana, Kebir Ratnani
  • Patent number: 5931653
    Abstract: The present invention relates to a low nitrogen oxygen regenerative burner, a regenerative burner system and a regenerative burning method. The low nitrogen oxide regenerative burner is comprised of one or more pairs of regenerators having a regenerating section inside and air supply and exhaust ports which open directly opened into a furnace; and one or more fuel injection nozzles for each of the air supply and exhaust ports, which also open directly into the furnace at locations apart from the corresponding air supply and exhaust port. The regenerative burner system consists of a furnace body, the low nitrogen oxide regenerative burner and a control means. The regenerative burning method is the process whereby air is preheated in the regenerator, injected from the air supply and exhaust ports of the regenerators into the furnace, fuel from the fuel injection nozzles located apart from the air supply and exhaust ports, is injected.
    Type: Grant
    Filed: July 24, 1995
    Date of Patent: August 3, 1999
    Assignee: Tokyo Gas Co., Ltd.
    Inventor: Ichiro Nakamachi
  • Patent number: 5876197
    Abstract: In order to create a regenerative, energy-saving fuel firing for an industrial furnace, particularly for a metal smelting furnace, that can flexibly take all possible time and space operating conditions and demands of the furnace to be heated as well as the thermic conditions of the respectively employed, heat-storing regenerators exactly into consideration, it is inventively proposed that at least two regenerator/burner modules (3) are switchable from burner mode (7) into regenerator mode (7r) (exhaust gas extraction mode) or, respectively, vice versa independently of one another proceeding from the process controller of the industrial furnace (1), namely with employment of reverse valves (11) or reversible ventilators or, respectively, two-stream ventilators.
    Type: Grant
    Filed: March 19, 1997
    Date of Patent: March 2, 1999
    Assignees: Gautschi Electro-fours S.A., BFI Betriebsforschungsinstitut, VDEh-Institut fur angewandte Forschung GmbH
    Inventors: Franz Engelberg, Martin Wicker, Gerhard Villinger, Wolfgang Bender