Heating Feed Patents (Class 431/11)
  • Publication number: 20030087213
    Abstract: The invention is directed to an ignition control system that dynamically adjusts the warm-up time of an igniter within a predetermined range depending on the success or failure of the previous ignition or start-up cycle. The system activates the igniter and waits a predetermined or computed warm-up time. At the end of the warm-up time, the system opens a gas valve. The system then waits a preset time from the opening of the gas valve to determine whether ignition was successful or not. If the ignition was successful, the system computes a new igniter warm-up time by decrementing the current time and stores this new value for use during the next start sequence. If the ignition was unsuccessful, the system computes a new warm-up time by incrementing the current value and retrying the start sequence. Preferably, a successful ignition is always determined by checking for the presence of flame a fixed time following the opening of the gas valve.
    Type: Application
    Filed: November 7, 2001
    Publication date: May 8, 2003
    Inventors: Allan J. Reifel, Bradley J. Campbell
  • 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
  • Publication number: 20030059729
    Abstract: A method for vaporizing and/or superheating a combustible/water mixture, wherein the combustible is especially methanol, for supplying a gas generation system (2) belonging to a fuel cell installation (3). The waste-gas from the fuel cell and/or gas generation system is catalytically combusted together with a gas containing oxygen in order to produce the thermal energy required therefore. The combustible is added in a dosed manner to the volume flow from the gas containing oxygen and the waste gases of the fuel cell and/or gas generator system in the direction of flow prior to catalytic combustion.
    Type: Application
    Filed: July 16, 2002
    Publication date: March 27, 2003
    Inventor: Rainer Autenrieth
  • Publication number: 20030054305
    Abstract: In a gas burner for introducing a fuel/air mixture into a combustion chamber, a tube is provided for introducing a source of primary air into a core portion of the fuel air mixture. The resulting secondary flame that is produced within the primary flame causes a reduction of NOX gases, which can be attributed to the dispersion of combustion byproducts within the primary flame. In one embodiment, the air supply tube enters the area of the fuel air mixture radially and then turns and extends axially along an extended axis of the burner.
    Type: Application
    Filed: September 20, 2001
    Publication date: March 20, 2003
    Inventor: Shailesh Sharad Manohar
  • Patent number: 6520767
    Abstract: Apparatus for reducing the total pressure of a compressible fluid fuel. The apparatus includes at least two closely spaced apart constant enthalpy expansion sections, each section having at least one orifice, the orifices in adjacent sections being noncoaxial. The pressure reduction lowers flow velocity when mixed with the air to below the flame speed to promote ignition and stable combustion.
    Type: Grant
    Filed: April 25, 2000
    Date of Patent: February 18, 2003
    Assignee: Supercritical Combusion Corporation
    Inventors: Brian S. Ahern, Charles W. Haldeman
  • Publication number: 20030013059
    Abstract: A reactor is provided which produces a hollow cone flame jet. The reactor is formed from a plurality of concentric casings, the inner casing defining a combustion chamber having a converging-diverging nozzle. A primary air chamber is axially positioned within the combustion chamber and has a second end having a substantially divergent conical shape.
    Type: Application
    Filed: July 10, 2001
    Publication date: January 16, 2003
    Inventors: Cornel Dutescu, Eduard Dutescu, Gilbert Versteeg
  • Patent number: 6499991
    Abstract: A liquid fuel vaporizer includes a combustion chamber in which heat is generated by burning fuel therein, an vaporization chamber in which liquid fuel is vaporized by the heat transferred from the combustion chamber to the vaporization chamber. Both chambers are integrally built in a housing, and liquid fuel is supplied from a single injector to both chambers. Liquid fuel consisting of small particles is supplied to the combustion chamber to improve combustion efficiency. Vaporized fuel in the vaporization chamber is prevented from being ignited and burnt therein by various manners, such as intercepting combustion flame, controlling an air/fuel ratio in a range out of a combustible range, or keeping vaporized fuel temperature at a level lower than its self-igniting temperature.
    Type: Grant
    Filed: March 2, 2000
    Date of Patent: December 31, 2002
    Assignee: Denso Corporation
    Inventors: Hiroyuki Usami, Hiroshi Okada, Kiyoshi Kawaguchi, Masakatsu Ueno
  • Publication number: 20020192608
    Abstract: The present invention relates to a method and to a device intended for spontaneous combustion of a fuel comprising organic, vegetable or mineral materials, the device comprising a combustion chamber, at least one fuel injection means, at least one air inlet, hot fumes discharge means. Chamber (1) comprises a cylindrical shell (11), the discharge means comprise a pipe (6) having the same axis as the chamber and arranged inside said chamber, and fuel injection means (7) is arranged substantially tangential to said cylindrical shell so that the fuel follows a circular motion around said pipe in the chamber.
    Type: Application
    Filed: June 12, 2002
    Publication date: December 19, 2002
    Inventors: Patrick Flament, Pierre Lacaze, Mouloud Hendou, Christophe Teulet
  • 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: 6450800
    Abstract: A burner that utilizes venturi action for induction of combustion air. The action of the venturi draws in surrounding air present around the nozzle to supply the necessary combustion air, provide forward moment to the burning gases to distribute their heat, and control the location of the heat release. The burner can thus be used to accomplish fuel gas injection directly into the combustion chamber of an oxidizer, and does not require a separate gas train or suffer from the other various drawbacks typical of conventional fuel gas injection systems. A stable flame is generated, and efficient heat-up accomplished. No extra combustion air is necessary.
    Type: Grant
    Filed: April 5, 2000
    Date of Patent: September 17, 2002
    Assignee: Megtec Systems Inc.
    Inventor: James T. Cash
  • Publication number: 20020127505
    Abstract: Fuel such as coal is combusted in a staged combustion device in a method comprising feeding into a first combustion stage of said furnace said fuel and gaseous oxidant containing more than 21 vol. % oxygen, and preferably 21.8 to 29 vol. % oxygen, at a stoichiometric ratio below that which, if the stage were operated with air as the only oxidant, would produce the same amount of NOx, and combusting said fuel with said gaseous oxidant in said combustion stage to produce combustion products and unburned fuel.
    Type: Application
    Filed: January 11, 2001
    Publication date: September 12, 2002
    Inventors: Hisashi Kobayashi, Lawrence E. Bool
  • Patent number: 6419480
    Abstract: A low NOx and CO emission heating apparatus provides for substantially separate fuel and combustion air feeds into a combustion chamber provided at one end with an exhaust gas opening and, at an opposite end with an elongated porous air distributor through which air is fed into the combustion chamber and into jets of fuel directed into the space between the air distributor and the side wall of the combustion chamber. Both air and fuel may be subjected to swirl to improve the combustion, by adjusting the inclination of the fuel nozzles.
    Type: Grant
    Filed: December 17, 1997
    Date of Patent: July 16, 2002
    Inventor: Ahmad Al-Halbouni
  • Publication number: 20020086253
    Abstract: A vaporization module is provided that includes a capillary member to convert non-pressurized liquid to pressurized vapor. The pressure is sustained by capillary pressure of the liquid in the capillary member. The capillary member has low thermal conductivity and small-sized pores that permits liquid to travel by capillary action toward the vaporization zone. Often, the pores of the capillary member are substantially uniform in size. The capillary member may comprise ceramic material. The module also includes an orifice plate that has one or more orifices to permit release of pressurized vapor, e.g. as a pressurized vapor jet. The orifice plate is associated with a sealing member to form an at least partial enclosure of the module so that vapor may accumulate and pressure may be increased within the module. In addition, other aspects of the present invention relating to the vaporization and pressurization of liquid are described.
    Type: Application
    Filed: February 19, 2002
    Publication date: July 4, 2002
    Inventors: Thomas M. Young, Niels O. Young, Lucy J. Young
  • 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
  • Publication number: 20020064739
    Abstract: A method serves the purpose of introducing fuel and/or thermal energy into a gas stream flowing to a catalytic reactor. The gas stream flows in part through an exterior chamber and in part through an interior chamber, which is at least partially open in the flow direction and to which fuel is supplied. The partial streams are re-united after flowing through the two chambers and are fed to the catalytic reactor. In a starting phase of the still cold catalytic reactor, the fuel is burned in the interior chamber. During conventional normal operating modes of the warm catalytic reactor, the fuel is vaporized in the interior chamber. In a suitable device, the exterior chamber and the interior chamber are designed as two tube elements that are inserted into one another.
    Type: Application
    Filed: November 9, 2001
    Publication date: May 30, 2002
    Inventors: Stefan Boneberg, Thomas Hoeger, Michael Schonert
  • Patent number: 6386862
    Abstract: A mixed gas supply portion 1 for mixing fuel with air, a mixed gas ejection portion 2 for ejecting the mixed gas mixed by the mixed gas supply portion 1, a breathable first catalyst body 5 provided downstream of the mixed gas supply portion 2, a breathable second catalyst body 7 provided downstream of the first catalyst body 5, a separation board a 6 for increasing gas flow resistance provided between the first catalyst body 5 and the second catalyst body 7, a heat exchange portion 13 having a heated fluid passage 14 positioned on the peripheral part, a radiant heat reception portion 3 provided upstream of the first catalyst body 5 and integrated with the heat exchange portion 13, and a separation board b 8 and a separation board c 10 provided downstream of the second catalyst body 7 for increasing flow resistance of the mixed gas and/or the combustion gas thereof are provided, and the separation board a 6, the separation board b 8, the separation board c 10 and the heat exchange portion 13 are integrated.
    Type: Grant
    Filed: March 16, 2000
    Date of Patent: May 14, 2002
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Tatsuo Fujita, Yoshitaka Kawasaki, Akira Maenishi
  • 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: 6350116
    Abstract: The invention concerns a pre-vaporizing and pre-mixing burner for liquid fuels which has a fuel feed line (56), a pump which pressurizes the fuel in the feed line, a mixing region (123) and a fuel valve (119) which opens out into the mixing region and by means of which the fuel is atomized and fed to the air for combustion (127). According to the invention, the fuel is vaporized in an optimum manner in that the fuel valve opens automatically as from a given fuel pressure, and a heating device (128) is associated with the fuel valve.
    Type: Grant
    Filed: March 12, 1999
    Date of Patent: February 26, 2002
    Inventor: Stephan Herrmann
  • Patent number: 6347936
    Abstract: A vaporization/pressurization module employs a porous member having a low thermal conductivity and a substantially uniform, small pore size. Liquid feed is introduced to the porous member and is heated, vaporized, and pressurized within and/or on a surface of the porous member to produce a vapor jet having a pressure higher than that of the liquid feed. A substantially vapor impermeable barrier facilitates accumulation and pressurization of the vapor, which is released from the module as a pressurized vapor jet from one or more restricted passages. The vaporization/pressurization module is especially useful for liquid fuel combustion applications.
    Type: Grant
    Filed: September 5, 2000
    Date of Patent: February 19, 2002
    Assignee: Allports LLC International
    Inventors: Thomas M. Young, Niels O. Young
  • Patent number: 6325003
    Abstract: A method for reducing NOx emissions from the combustion of carbonaceous fuels using two sequential stages of partial oxidation followed by a final oxidation stage. In the first stage, substoichiometric air condition of about 0.55 to 0.75 is used in a plug flow fashion, while second stage combustion is performed at a stoichiometric ratio of about 0.80 to 0.99. As the second stage combustion products are cooled by radiant heat transfer to the boiler furnace walls, overfire air is added to produce an stoichiometric ratio of about 1.05 to 1.25 to complete the combustion process. In this manner, the formation of thermal NOx is reduced.
    Type: Grant
    Filed: June 8, 2000
    Date of Patent: December 4, 2001
    Assignee: Clearstack Combustion Corporation
    Inventors: Robert Ashworth, Frederick J. Murrell, Edward A. Zawadzki
  • Patent number: 6325002
    Abstract: A method for reducing NOx emissions from the combustion of carbonaceous fuels using three stages of oxidation and second stage in-situ furnace flue gas recirculation. In the first stage, a partial oxidation combustor is used to partially combust the fuel in the presence of preheated combustion air. The fuel gas produced in the partial oxidation process is passed to a second stage partial oxidation combustor while molten slag is removed and disposed of. Preheated combustion air also is introduced into the second stage of combustion to produce a slightly reducing flue gas and is injected into the furnace in such a way as to create the desired in-situ furnace flue gas recirculation. In the upper part of the furnace a third combustion air is mixed with the flue gas in a third stage of combustion to substantially complete the combustion process. Preheated steam may be added to the first or second stages of combustion.
    Type: Grant
    Filed: June 8, 2000
    Date of Patent: December 4, 2001
    Assignees: Clearstack Combustion Corporation
    Inventor: Robert A. Ashworth
  • Patent number: 6290487
    Abstract: A method for providing fuel injection in combustion equipment by increasing the velocity of fuel flow delivered to an appliance incorporating a combustion zone and a burner therein, such as to increase ignition speed and flame speed during the combustion process and to reduce the appliance's harmful stack emissions, by employing a device which increases fuel volume while at the same time reducing fuel density through extracting heat from the appliance's combustion zone in order to pre-heat fuel for delivery to the appliance's burner at a constant, pre-set operating temperature of between 100 degrees Fahrenheit and the fuel's flash point temperature.
    Type: Grant
    Filed: May 26, 2000
    Date of Patent: September 18, 2001
    Inventor: William H. Velke
  • Patent number: 6270337
    Abstract: This invention relates to an apparatus and method for increasing the reactivity of a fuel/air mixture prior to homogenous combustion of the mixture. More specifically, this invention is a pilot for a gas turbine combustor which utilizes the heat of combustion within the pilot to increase the reactivity of a portion of the fuel/air mixture utilized by the pilot.
    Type: Grant
    Filed: June 12, 1998
    Date of Patent: August 7, 2001
    Assignee: Precision Combustion, Inc.
    Inventors: Shahrokh Etemad, Hasan Ul Karim, William C. Pfefferle
  • Patent number: 6270336
    Abstract: A combustion control method for use in a catalytic combustion system having (a) a gaseous mixture inlet port, located at the upstream side of said catalytic combustion system, for the entrance of a fuel-air mixture; (b) an exhaust gas outlet port, located at the downstream side of said catalytic combustion system, for the exit of an exhaust gas; (c) a primary combustion chamber in which a catalyst body is disposed, said catalyst body being formed of a porous base material with numerous communicating holes that supports thereon an oxidation catalyst; (d) a secondary supply port, located downstream of said primary combustion chamber, for the supply of a gaseous mixture or air; and (e) a secondary combustion chamber located downstream of said secondary supply port; comprising such process that an excess air ratio of said primary combustion chamber is initially set above 1 and after the rate of combustion of said secondary combustion chamber exceeds a given level, combustion is made to take place, with the
    Type: Grant
    Filed: June 4, 1999
    Date of Patent: August 7, 2001
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Tetsuo Terashima, Kiyoshi Taguchi, Yoshitaka Kawasaki, Motohiro Suzuki, Jiro Suzuki
  • 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: 6210150
    Abstract: A method and an apparatus of operating a boiler fired with liquid or gaseous hydrocarbons are described. Fuel and atomizing air are supplied to the burner of the boiler wherein the atomizing air is subjected to a moistening process prior to mixing with the fuel. Heated water is vaporized and is contacted with the atomizing air. The generated water vapor together with the atomizing air is supplied to the burner. In this manner, the portion of the NOx emissions in the flue gas of the boiler can be reduced.
    Type: Grant
    Filed: October 7, 1998
    Date of Patent: April 3, 2001
    Assignee: Munters Euroform GmbH
    Inventors: Per Rosén, Jan Wettergard
  • 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: 6179609
    Abstract: A compact torch for use in semiconductor processing which may be used both to produce steam and to perform wet or dry dichlorethylene (DCE) oxidation at varying concentrations with no reconfiguration of the torch, providing full temperature of control of the oxidation product gases, with redundancy to provide automatic backup of heating and ignition elements, and with non-mechanical flow control of the oxidation product gases.
    Type: Grant
    Filed: July 2, 1999
    Date of Patent: January 30, 2001
    Assignee: Persys Technology Ltd.
    Inventors: Gideon Drimer, Leo Mendelovici, Nachum Borivker
  • Patent number: 6174160
    Abstract: Method and apparatus to prevaporize and premix liquid and/or gaseous fuels with air in two stages at two different temperatures prior to combustion. The invention is directed to the entry of a finely atomized liquid fuel, such as No. 2 diesel, into an inlet end of an annular chamber. Air is mixed with finely atomized liquid fuel, preferably generated by a small flow number liquid fuel nozzle, in a first chamber of the annular chamber at a first (relatively high) temperature for a relatively long residence time. The air and liquid fuel is moved into a second chamber of the annular chamber where a secondary hotter air is injected into the annular chamber by a plurality of staggered high velocity jets to prevaporize and premix the combined fuel and air mixture at a second higher temperature, but for a shorter time. The intense prevaporization and premixing make the mixture suitable for entry into a combustor, but without the need to add water or steam to keep pollutant emissions low.
    Type: Grant
    Filed: March 25, 1999
    Date of Patent: January 16, 2001
    Assignee: University of Washington
    Inventors: John C. Y. Lee, Philip C. Malte
  • Patent number: 6162046
    Abstract: A vaporization/pressurization module employs a porous member having a low thermal conductivity and a substantially uniform, small pore size. Liquid feed is introduced to the porous member and is heated, vaporized, and pressurized within and/or on a surface of the porous member to produce a vapor jet having a pressure higher than that of the liquid feed. A substantially vapor impermeable barrier facilitates accumulation and pressurization of the vapor, which is released from the module as a pressurized vapor jet from one or more restricted passages. The vaporization/pressurization module is especially useful for liquid fuel combustion applications.
    Type: Grant
    Filed: July 23, 1997
    Date of Patent: December 19, 2000
    Assignee: Allports LLC International
    Inventors: Thomas M. Young, Niels O. Young, deceased, by Lucy J. Young, legal representative
  • Patent number: 6155819
    Abstract: This invention relates to an apparatus and method for increasing the reactivity of a fuel/air mixture prior to homogenous combustion of the mixture. More specifically, this invention is a pilot for a gas turbine combustor which utilizes the heat of combustion within the pilot to increase the reactivity of a portion of the fuel/air mixture utilized by the pilot.
    Type: Grant
    Filed: June 12, 1998
    Date of Patent: December 5, 2000
    Assignee: Precision Combustion, Inc.
    Inventors: Shahrokh Etemad, Lance L. Smith, Hasan Ul Karim, Gregory Scott Jackson, William C. Pfefferle
  • Patent number: 6123540
    Abstract: A heavy oil emulsion fuel combustion apparatus is arranged, in a combustion apparatus using a heavy oil emulsion fuel, to prevent a decrease in the combustion efficiency due to water content in the fuel and to prevent an increase in the sulfuric acid dew point due to water content in the exhaust gas. A heavy oil emulsion fuel 101 from a fuel tank 100 is led to a fuel heater 110 and is heated. Then the heated heavy oil emulsion fuel 102 is led to a water content evaporator 120. In the water content evaporator 120, the heavy oil emulsion fuel 102 is heated by the use of extraction steam from a steam turbine facility 160 or steam produced through a steam converter 166, and the resulting fuel is led to a steam separator 140. In the steam separator 140, the fuel 111 is separated into steam and light oil combustible gas vapor 121 and a heavy oil portion 122, the latter 122 being used as boiler fuel 131.
    Type: Grant
    Filed: June 4, 1997
    Date of Patent: September 26, 2000
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Kan Ogata, Akira Yamada, Kimishiro Tokuda, Toshimitsu Ichinose, Hiroshi Kikuchi, Yasuo Souda, Satoshi Uchida, Syozo Kaneko
  • 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: 6106278
    Abstract: The object of the invention is to provide a novel combustion chamber which has an improved air supply and also ensures an optimum incident flow to the burners when the mass flows of cooling and combustion air are different. According to the invention, this is achieved in that the at least one cooling duct (10) is extended right into the plenum (13) and is formed inside the plenum (13) as a diffuser (14) having an orifice (12) leading into the plenum (13). The at least one opening (15, 15') in the burner dome (4) is arranged in the region of the diffuser (14) or directly downstream of its orifice (12). A bypass duct (16, 16') having an orifice (17, 17') leading into the plenum (13) follows downstream of each opening (15, 15'). The orifice (17, 17') of each bypass duct (16, 16') is oriented at least approximately in parallel with the orifice (12) of the diffuser (14) and is also designed so as to be offset step-like to the outside.
    Type: Grant
    Filed: May 15, 1998
    Date of Patent: August 22, 2000
    Assignee: ABB Research Ltd.
    Inventors: Leif Andersson, Peter Jansohn, Jonathan Lloyd
  • 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: 6095793
    Abstract: A unique and useful dynamic control system has been invented for the control of a catalytic combustion system for use on a dynamic plant, preferably, a gas turbine engine. The dynamic control system facilitates the replacement of conventional flame combustion systems with catalytic combustion systems, which produce far less pollutants, by producing acceptable transient performance of the combustion system. A method of controlling the catalytic combustion process comprises the steps of calculating a mass flow of air introduced into the combustor, monitoring a flow of fuel to be combusted within the combustor, monitoring a temperature of the air introduced into the combustor, calculating an inlet temperature set point based on the mass flow and fuel flow, and controlling a pre-burner to heat the air based on the inlet temperature set point, the mass flow, and the temperature of the air. Further, the mass flow may be estimated based on ambient air temperature and pressure, and compressor speed.
    Type: Grant
    Filed: September 18, 1998
    Date of Patent: August 1, 2000
    Assignee: Woodward Governor Company
    Inventor: Kevin Greeb
  • 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: 6085551
    Abstract: In the manufacturing of high melting point glasses with volatile components, in particular of glasses from the group of boron glasses and borosilicate glasses, a furnace is provided that has a superstructure, fossil fuel burners, and a melting tank. In front of a conditioning zone and a throat leading to an extraction zone, a step-shaped raised area in the bottom is provided which is formed continuously over the complete width of the melting tank. In order to suppress segregation or, respectively, phase separation, to protect the furnace construction materials and to enable problem-free operation, a temperature of at least 1600.degree. C.
    Type: Grant
    Filed: April 2, 1998
    Date of Patent: July 11, 2000
    Assignee: Beteiligungen Sorg GmbH & Co. KG
    Inventors: Helmut Pieper, Joachim Matthes
  • 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: 6053725
    Abstract: A method and device for producing heat energy by bringing water into contact with pre-heated oil in a chamber within a reaction vessel is disclosed. When the water and the oil meet, a violent reaction results in which a flame-like eruption of very hot gases is emitted. The heat energy released by this reaction is more than can be obtained by simply burning oil alone.
    Type: Grant
    Filed: October 23, 1996
    Date of Patent: April 25, 2000
    Assignee: Selany Corporation N.V.
    Inventors: Ladislao Pompei, Guido Parisi
  • Patent number: 6042368
    Abstract: An appliance for burning a combustible gas, for example a liquefied petroleum gas. The appliance includes a relatively massive metal body forming a heat sink, in which there is formed a passage for flow of the combustible gas from a feed inlet to a discharge outlet. A control member controls the flow rate of the combustible gas. A mixing member for mixes primary air in with a stream of the combustible gas in a gaseous phase in order to obtained a mixture that can be burned. A burner burns the mixture to be burned, and is in thermal connection with the metal body. The control member includes a pressure reducer, at least partially incorporated into the metal body. The pressure reducer includes a chamber into which the combustible gas is admitted in a liquid phase at high pressure, and a chamber from which the gas is discharged at low pressure, at least partially in the gaseous phase. The chambers are formed in the metal body.
    Type: Grant
    Filed: February 3, 1998
    Date of Patent: March 28, 2000
    Assignee: The Coleman Company, Inc.
    Inventors: Marc Champion, Gerard Scremin, Alain Huguet, Eric Carrato, Thomas M. Benton, Randall L. May
  • Patent number: 6036473
    Abstract: A heavy oil emulsified fuel combustion apparatus is provided in which steam bubbles generated in the pressure reduction operation for dewatering a heavy oil emulsified fuel before combustion are prevented from mixing into a dewatered heavy oil side resulting in lowering of a dewatering efficiency.In a heavy oil emulsified fuel combustion boiler, a heavy oil emulsified fuel 101 is heated by a heater 110 and dewatered by a flusher 120 and then introduced into a boiler 10 for combustion, and water 152 obtained by the dewatering is sent to a water utilizing system of the boiler. The heavy oil emulsified fuel 102 is heated in a high pressure and then introduced into a pressure reducing device 200 to be applied by a pressure reduction by multi-stage orifices 201 for dewatering. The pressure reduction is done with a pressure reduction per stage of 1 to 3 ata.
    Type: Grant
    Filed: March 31, 1998
    Date of Patent: March 14, 2000
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Toshimitsu Ichinose, Hirokazu Hino, Akira Yamada, Hiroshi Kikuchi, Katsuyuki Ueda
  • 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: 6012915
    Abstract: There is disclosed a method of combusting a water/fossil fuel mixed emulsion, which comprises elevating the temperature of a water/fossil fuel mixed emulsion, and vaporizing the emulsion, with a temperature-elevating and vaporizing apparatus 3, jetting the water/fossil fuel mixed gas thus formed by that elevation of the temperature and that vaporization from a burner 7, and bringing a Brown's gas flame of a Brown's gas combustion burner 5, in contact with the flow of the mixed gas, thereby combusting the water/fossil fuel mixed gas. There is also disclosed an apparatus for combusting a water/fossil fuel mixed emulsion. According to the combusting method and the combustion apparatus, it is possible to combust the water/fossil fuel mixed emulsion with good energy efficiency, and to obtain high calories resulting from the combustion.
    Type: Grant
    Filed: December 2, 1998
    Date of Patent: January 11, 2000
    Assignees: Zenshin Electric Power Engineering Company, Ltd., Tadashi Miyamoto
    Inventors: Masahiro Mori, Toshiyasu Satoh