Of Noncombustible Fluid; E.g., Air, Etc. Patents (Class 110/188)
  • Publication number: 20110139045
    Abstract: An air/gas premix burner, comprising: a fan for sending the air/gas mixture to a combustion head; a gas valve for regulating admission of the combustible gas; an air/gas mixer, which comprises a device for localized loss of pressure; and a combustion head. The premix burner is characterized in that the air/gas mixer comprises at least two channels for mixing the air with the gas; in addition, a channel is provided with an open/close element designed to regulate the flow rate of the mixture.
    Type: Application
    Filed: April 29, 2009
    Publication date: June 16, 2011
    Applicant: GAS POINT S. R. L.
    Inventors: Claudio Zatti, Raffaello Rastelli, Nicola Lovascio
  • Publication number: 20110131990
    Abstract: A combustion plant, comprising: a combustion chamber (1) for combustion of a mass of fuel; a postcombustion device (2) for thermodestruction of the incondensable gases generated by combustion in the chamber (1); a pipe (9) for conveying the combustion fumes from said chamber (1) to said postcombustor (2); a supply (21) of oxygen-enriched air to said chamber (1) and/or to said postcombustor (2); and a device (4) for abatement of the carbon dioxide contained in the combustion fumes that are to reach the postcombustor.
    Type: Application
    Filed: July 28, 2009
    Publication date: June 9, 2011
    Inventor: Michele Cataldo
  • Patent number: 7955577
    Abstract: Sorbent components containing calcium, alumina, and silica are used in combination during coal combustion to produce environmental benefits. Sorbents are added to the coal ahead of combustion and/or are added into the flame or downstream of the flame, preferably at minimum temperatures to assure complete formation of the refractory structures that result in various advantages of the methods. When used together, the components reduce emissions of elemental and oxidized mercury; increase the level of Hg, As, Pb, and/or Cl in the coal ash; decrease the levels of leachable heavy metals (such as Hg) in the ash, preferably to levels below the detectable limits; and make a highly cementitious ash product.
    Type: Grant
    Filed: June 10, 2010
    Date of Patent: June 7, 2011
    Assignee: NOx II, Ltd
    Inventor: Douglas C. Comrie
  • Publication number: 20110126742
    Abstract: Provided are a method and an apparatus of controlling a flow rate of a primary recirculating exhaust gas in an oxyfuel combustion boiler, capable of realizing a stable combustion by a burner in oxyfuel combustion. Weight ratio of flow rate of primary recirculating exhaust gas [ton/h] to amount of pulverized coal from a mill [ton/h] is defined as G/C, and the flow rate of primary recirculating exhaust gas is controlled so that the G/C falls within a given range.
    Type: Application
    Filed: March 6, 2008
    Publication date: June 2, 2011
    Applicants: IHI Corporation, ELECTRIC POWER DEVELOPMENT CO., LTD,
    Inventors: Shuuhei Terushita, Toshihiko Yamada, Shuzo Watanabe, Terutoshi Uchida
  • Publication number: 20110083594
    Abstract: Provided are a method and an apparatus of controlling an oxygen supply in an oxyfuel combustion boiler capable of attaining stable oxyfuel combustion even when properties of coal are changed. A boiler-brought-in oxygen density is obtained when coal with a fuel ratio measured by fuel measuring means 39 is burned stably with oxygen in a boiler 4 so that a relationship between the fuel ratio and/or carbon content of the coal and the boiler-brought-in oxygen density is obtained and inputted in advance into the controller. When the coal is changed to the new kind of coal, a total amount of gases recirculated is regulated such that a boiler-brought-in oxygen density becomes accordance with a fuel ratio and/or a carbon content which is measured in advance for the new kind of coal.
    Type: Application
    Filed: March 6, 2008
    Publication date: April 14, 2011
    Applicants: IHI Corporation, ELECTRIC POWER DEVELOPMENT CO., LTD.
    Inventors: Shuuhei Terushita, Toshihiko Yamada, Shuzo Watanabe, Terutoshi Uchida
  • Publication number: 20110056416
    Abstract: A system with a boiler and a turbine, and an associated control method. The method includes sensing a plurality of operating conditions at a first common boiler location. At least one of the plurality of operating conditions sensed at the first common location is indicative of a combustion anomaly occurring during operation. The combustion anomaly indicated by the plurality of operating conditions at the first common location is traced back to an offending burner that is at least partially responsible for the combustion anomaly based on a model that takes into consideration at least two of the plurality of operating conditions sensed at the first common location. At least one of a process input and a boiler configuration is adjusted to establish a desired value of the operating conditions at the first common location.
    Type: Application
    Filed: September 4, 2009
    Publication date: March 10, 2011
    Applicant: General Electric Company
    Inventors: Neil Colin Widmer, David Moyeda, William Randall Seeker, Michelle Simpson
  • Publication number: 20100319593
    Abstract: Means for obtaining accurate knowledge of location and amount of fouling inside a heat exchange system, such as a boiler of a power plant, are provided. According to the invention this knowledge can be used to optimize cleaning of a heat exchange system. The system of the invention comprises: Means for measuring particles in the exhaust gas stream of the heat exchange system. These particles are at least partly released when cleaning a certain part of the heat exchange surface of the heat exchange system. Means for creating information of the fouling in an electronic memory by linking together coordinates of the part of the heat exchange surface being cleaned and the measurement data created during the cleaning of said part.
    Type: Application
    Filed: August 9, 2010
    Publication date: December 23, 2010
    Inventor: Tomas ROSIN
  • Publication number: 20100307393
    Abstract: A boiler according to the invention contains an additional air channel (9) with an inbuilt fan (10) with adjustable output. The first end (91) of the additional air channel (9) is connected with the under-stoker space (11) located outside of the wind boxes (5) of the under-stoker wind boxes system (4). The other end (9?) of the additional air channel (9) is connected with either the space of the channel (6) supplying outside air to the wind boxes (5) or with the atmosphere or with the secondary air channel of the combustion chamber (2). Modernization of the existing boilers consists in installation in the described above method of an additional air channel (9) with an inbuilt fan (10).
    Type: Application
    Filed: December 1, 2008
    Publication date: December 9, 2010
    Inventor: Witold Kowalewski
  • Publication number: 20100229768
    Abstract: A method is provided for regulating the output of a solid fuel furnace having primary and secondary combustion chambers arranged adjacent to each other, in particular one above the other or side by side, and are separated from each other by a partition in the floor or wall but are nevertheless connected to each other by at least one partition opening. The secondary combustion chamber is connected through a secondary exhaust-gas channel to a flue-gas passage, and the primary combustion chamber is connected to the flue-gas passage by a transition opening, wherein the transition opening can be closed at least partially by a flue-gas flap. Both a primary air supply and a secondary air supply are provided. A first temperature sensor is arranged in the secondary exhaust-gas channel and controls the primary air volume flow as a function of the temperature in the secondary exhaust-gas channel, while the secondary air volume flow is held substantially constant.
    Type: Application
    Filed: March 11, 2010
    Publication date: September 16, 2010
    Applicant: GLOBAL MIND NETWORK GMBH
    Inventor: Gerdum ENDERS
  • Publication number: 20100224108
    Abstract: A pulverized coal-fired boiler efficiently supplies air to a central part of a furnace and the neighborhood of a furnace wall, thereby promoting mixture with combustion gas, and reducing both NOx and CO. The main after air ports are structured so as to jet air having a large momentum for enabling arrival at the central part of the furnace, and the sub-after air ports are structured so as to jet air having a small momentum to the neighborhood of the wall face of the furnace, and a sectional center of each of the sub-after air ports is within a range from 1 to 5 times of a caliber of the main after air ports from a sectional center of each of the main after air ports.
    Type: Application
    Filed: January 10, 2007
    Publication date: September 9, 2010
    Inventors: Yuki Kamikawa, Masayuki Taniguchi, Hisayuki Orita, Hironobu Kobayashi, Akira Baba, Toshihiko Mine, Shinichirou Nomura, Noriyuki Ooyatsu, Satoshi Tadakuma, Hidehisa Yoshizako, Hiroaki Kanemoto, Kouji Kuramashi, Akihito Orii, Shinji Tsuda, Hirofumi Okazaki, Takanori Yano, Katsumi Shimohira
  • Publication number: 20100180502
    Abstract: In a burner for highly caking coal in which a solid fuel channel that is attached penetrating through a surrounding wall of a gasifier for gasifying a highly caking solid fuel that has been pulverized into particles and that supplies the solid fuel into the gasifier by gas flow transportation, and a gasifying agent channel that supplies a gasifying agent into the gasifier are provided, a blockage detection unit that detects a blockage situation of the solid fuel channel is provided, and a process for reducing the temperature of the solid fuel is performed when the blockage detection unit detects a predetermined blockage situation.
    Type: Application
    Filed: July 11, 2008
    Publication date: July 22, 2010
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Yoshinori Koyama, Takeshi Aruga, Hiromi Ishii
  • Patent number: 7758827
    Abstract: Sorbent components containing calcium, alumina, silica, and halogen are used in combination during coal combustion to produce environmental benefits. Sorbents are added to the coal ahead of combustion and/or are added into the flame or downstream of the flame, preferably at minimum temperatures to assure complete formation of the refractory structures that result in various advantages of the methods. When used together, the components ? reduce emissions of mercury and sulfur; ? reduce emissions of elemental and oxidized mercury; ? increase the efficiency of the coal burning process through de-slagging of boiler tubes; ? increase the level of Hg, As, Pb, and/or Cl in the coal ash; ? decrease the levels of leachable heavy metals (such as Hg) in the ash, preferably to levels below the detectable limits; and ? make a highly cementitious ash product.
    Type: Grant
    Filed: March 16, 2006
    Date of Patent: July 20, 2010
    Assignee: NOx II, Ltd.
    Inventor: Douglas C. Comrie
  • Publication number: 20100101465
    Abstract: A method for injecting fuel, oxidant, and ballast into an oxycombustoin boiler is presented.
    Type: Application
    Filed: October 14, 2009
    Publication date: April 29, 2010
    Applicant: L'Air Liquide Societe Anonyme Pour L'Etude et l'Exploitaion Des Procedes Georges Claude
    Inventors: Jacky Laurent, Xavier Paubel, Jacques Mulon, Patrick Jean-Marie Recourt, Ivan Sanchez-Molinero, Remi Pierre Tsiava
  • Publication number: 20100077941
    Abstract: This disclosure includes a system and method of controlling fuel combustion including providing a system, measuring a property, and providing oxygen and fuel in response to the property. The system includes a furnace arranged and disposed to receive fuel and oxygen and combust the fuel and the oxygen to form a combustion fluid, a plurality of heat exchanger sections arranged and disposed to receive heat from the combustion fluid, and a plurality of oxygen injectors arranged and disposed to controllably provide oxygen to the combustion fluid to adjust composition of the combustion fluid and temperature of the combustion fluid. The property measured is selected from the group consisting of temperature of the combustion fluid, composition of the combustion fluid, temperature of the heat exchanger sections, and combinations thereof and is performed in close proximity to the oxygen injectors.
    Type: Application
    Filed: September 26, 2008
    Publication date: April 1, 2010
    Applicant: Air Products and Chemicals, Inc.
    Inventor: Mark Daniel D'Agostini
  • Publication number: 20100050912
    Abstract: In order, for operating the lance burner of a rotary tubular furnace for the production of cement clinker from calcined raw cement meal, to provide an automated regulation method which is optimized in terms of the configuration of the burner flame for all types and quantities of fuels used, according to the invention a regulation method is proposed in which the characteristics of the burner flame are used as measurement variables, and the measurement variables are delivered to a controller which can vary at least three different manipulated variables of the burner, such as the spatial outflow angle and the swirl momentum of the swirled primary-airstream and/or the angle of divergence of the primary-air/jet-air jets emerging from individual nozzles and/or the velocity of emergence and/or swirl component of a stream of fragmentary alternative fuels or secondary fuels which is blown through the burner.
    Type: Application
    Filed: December 20, 2007
    Publication date: March 4, 2010
    Applicant: KHD HUMBOLDT WEDAG GMBH
    Inventors: Matthias Mersmann, Gernot Jäger, Alexander Knoch
  • Publication number: 20100031858
    Abstract: The present invention provides a highly reliable pulverized coal boiler that ensures suppression of a rise in flame temperature caused during the combustion of an unburnt gas in a furnace when combustion air is supplied from after-air ports so as to reduce the concentration of thermal NOx generated during the combustion.
    Type: Application
    Filed: November 6, 2007
    Publication date: February 11, 2010
    Inventors: Akihito Orii, Masayuki Taniguchi, Yuki Kamikawa, Hironobu Kobayashi, Miki Shimogouri, Toshihiko Mine, Shinichiro Nomura, Akira Baba, Yusuke Ochi, Koji Kuramashi
  • Publication number: 20090272300
    Abstract: Provided are a method and an apparatus for controlling combustion in an oxygen fired boiler which are easily applicable to an existing air fired boiler for easy and stable control of the combustion. Oxygen with a setting amount in accordance with a boiler load demand 35 is supplied to a boiler body 4. Heat absorption amount of the boiler is measured from inlet temperature of feedwater supplied to the boiler body 4 and outlet temperature of steam. Recirculation flow rate of combustion exhaust gas 14a is controlled such that heat absorption amount 41 of the boiler body 4 becomes equal to a targeted heat absorption amount 42 to thereby control oxygen concentration in all gas guided to the boiler body 4.
    Type: Application
    Filed: November 28, 2006
    Publication date: November 5, 2009
    Applicants: ELECTRIC POWER DEVELOPMENT CO., LTD., IHI Corporation
    Inventors: Toshihiko Yamada, Toshiro Fujimori, Shinichi Takano
  • Publication number: 20090260553
    Abstract: A device is supplying combustion air to a combustion chamber, in which solid fuel is being burned, and the air supply is controlled in accordance with at predetermined program as a function of combustion time. The predetermined program is preferably based on empirical data. The combustion air may be supplied by means of a valve member, which is displaceable between first and second positions, and the valve member may expose varying areas of air supply opening(s) when moved between said positions. Biasing means, such as spring means, may bias the valve member towards said second position and slowing-down means may delay the movement of the valve member.
    Type: Application
    Filed: April 20, 2009
    Publication date: October 22, 2009
    Applicant: ADURO A/S
    Inventor: CHRISTIAN SKOVBO
  • Publication number: 20090183660
    Abstract: A method for controlling the combustion air supply in a steam generator that is fueled with fossil fuels, the combustion air being supplied gradually in different combustion zones. The combustion air supply is controlled, depending on the NOx and/or CO content in the flue gas, in such a manner that first the air supply is varied between the different combustion zones with approximately constant air volumes. An external control of the overall air volume overrides this type of control.
    Type: Application
    Filed: July 5, 2007
    Publication date: July 23, 2009
    Inventor: Friedhelm Wessel
  • Patent number: 7500437
    Abstract: Methods and systems are provided for controlling SCR performance in a boiler. The boiler includes one or more generally cross sectional areas. Each cross sectional area can be characterized by one or more profiles of one or more conditions affecting SCR performance and be associated with one or more adjustable desired profiles of the one or more conditions during the operation of the boiler. The performance of the boiler can be characterized by boiler performance parameters. A system in accordance with one or more embodiments of the invention can include a controller input for receiving a performance goal for the boiler corresponding to at least one of the boiler performance parameters and for receiving data values corresponding to boiler control variables and to the boiler performance parameters. The boiler control variables include one or more current profiles of the one or more conditions.
    Type: Grant
    Filed: December 15, 2004
    Date of Patent: March 10, 2009
    Assignee: NeuCo, Inc.
    Inventors: Wesley Curt Lefebvre, Daniel W. Kohn
  • Patent number: 7475646
    Abstract: A system and a method for decreasing a rate of slag formation at predetermined locations in a boiler system are provided. The boiler system has a plurality of burners, a plurality of slag detection sensors, a plurality of temperature sensors and a plurality of CO sensors disposed therein. The system determines locations within the boiler system that have relatively high slag thickness levels utilizing the plurality of slag detection sensors and then adjusts A/F ratios or mass flows of burners affecting those locations, or adds slag reducing additives to the burners affecting those locations, to decrease a rate of slag formation at the locations, utilizing signals from the plurality of slag detection sensor, the plurality of temperature sensors, and the plurality of CO sensors.
    Type: Grant
    Filed: November 30, 2005
    Date of Patent: January 13, 2009
    Assignee: General Electric Company
    Inventors: Neil Colin Widmer, Avinash Vinayak Taware
  • Patent number: 7318381
    Abstract: Methods and systems for measuring and controlling the percent stoichiometric oxidant in the pyrolyzing section of incinerators are provided. The methods and systems rely on measurements of the oxygen concentration and temperature of the gases within the pyrolysis section and mathematical relationships between these values and the percent stoichiometric oxidant.
    Type: Grant
    Filed: October 12, 2004
    Date of Patent: January 15, 2008
    Assignee: John Zink Company, LLC
    Inventors: Kenny M. Arnold, Jianhui Hong, Joseph D. Smith
  • Patent number: 7077069
    Abstract: A boiler includes a coal pulverizer that pulverizes coal; a coal combustion unit that combusts gasified pulverized coal that has been pulverized by the coal pulverizer; a furnace that combusts gasified fuel generated by the coal combustion unit; a slag formation unit provided in an ash outlet of the coal combustion unit; means for supplying primary air, for supply of the pulverized coal; to the coal pulverizer; means for supplying secondary air, for gasified combustion, to the coal combustion unit; and means for supplying tertiary air, for gasified fuel combustion, to the furnace.
    Type: Grant
    Filed: October 4, 2002
    Date of Patent: July 18, 2006
    Assignee: Kawasaki Jukogyo Kabushiki Kaisha
    Inventors: Yoshitaka Oomura, Takashi Yoshiyama, Chikatoshi Kurata
  • Patent number: 7004084
    Abstract: A corn-burning stove provides cooling for the corn in-feed auger and other adjacent components by combustion inlet air flow patterns. The inlet air flow transports pellet fuel through a distance within the fire pot which varies responsive to the flow rate of the inlet air flow. A fire pot and agitator ensure, in combination with the inlet air flow, complete burning of the corn, with almost no ash production and while avoiding the formation of clinkers. The agitator is toothed, having teeth closely adjacent the burn pot for moving burning corn kernels or solid pellets across the fire pot. Retractable ignitors have handles and furnace function interlocks. A process control is associated with the corn burner that includes some logic, including interlock, power control, speed controls, sensing inputs/devices, and user interface.
    Type: Grant
    Filed: August 5, 2003
    Date of Patent: February 28, 2006
    Inventors: C. Merton Anderson, Charles Lynn Anderson
  • Patent number: 6959654
    Abstract: A solid fuel fed combustor method having a first chamber portion with an inlet feeding a metered amount of a solid fuel to a first burner stage having a first traveling conveyor firebelt. A metered amount of air is introduced in progressively increasing proportions along the length thereof to cause endothermic reduction of the solid fuel. The first stage feeds a second burner stage having a second traveling conveyor firebelt. Air is introduced in a progressively decreasing amount along the length of the second traveling conveyor firebelt to induce exothermic combustion and decomposition of fuel. The amount of air introduced and speed of the conveyors are controlled to minimize the quantity of carbon monoxide and nitrogen oxides and other pollutants. Radiative energy generated from fuel traveling on the traveling conveyor firebelts is reflected on fuel traveling on the first firebelt.
    Type: Grant
    Filed: December 31, 2002
    Date of Patent: November 1, 2005
    Inventor: Stan E. Abrams
  • Patent number: 6857379
    Abstract: According to a conventional method for incinerating organic waste material, a fluidization device causes an oxygenous fluidizing gas to flow through the waste material, which is located in an incineration chamber, from underneath while forming a fluidized particle layer and the waste material is incinerated. The resulting flue gas is withdrawn via an open space situated above the particle layer and is subjected to a secondary incineration in a secondary reaction zone or secondary incineration chamber. Expanding upon the prior art, the aim of the invention is enable a high throughput for the incineration material while resulting in a low level of nitrogen oxide production, and to increase the productivity for the incineration of organic waste material. To these ends, the invention provides that the fluidized particle layer (3) is concentrated with oxygen in such a manner that a mean oxygen content ranging from 0-3 vol. % is set in the open space (6).
    Type: Grant
    Filed: May 2, 2001
    Date of Patent: February 22, 2005
    Assignee: Messer Griesheim GmbH
    Inventors: Gerhard Gross, Paul Ludwig, Diana Wassmann, Hans-Peter Theis
  • Patent number: 6843185
    Abstract: An oxygen-fuel combustion system combines oxygen and fuel to produce a flame. The system distributes oxygen to a stream of fluidized, pulverized, solid fuel at various sites before and after ignition. The system is operable to vary the concentration of oxygen in an oxygen-fuel mixture extant at those sites.
    Type: Grant
    Filed: June 27, 2003
    Date of Patent: January 18, 2005
    Assignee: Maxon Corporation
    Inventor: Curtis L. Taylor
  • Publication number: 20040261671
    Abstract: An oxygen-fuel combustion system combines oxygen and fuel to produce a flame. The system distributes oxygen to a stream of fluidized, pulverized, solid fuel at various sites before and after ignition. The system is operable to vary the concentration of oxygen in an oxygen-fuel mixture extant at those sites.
    Type: Application
    Filed: June 27, 2003
    Publication date: December 30, 2004
    Inventor: Curtis L. Taylor
  • Patent number: 6799526
    Abstract: Methods of increasing the throughput of recovery boilers equipped with at least three levels of injection of air with oxygen enrichment of the air in at least one air level. In one method, a black liquor recovery boiler has three levels of air injection, and oxygen enrichment is applied to at least the secondary and the tertiary air injection levels. In another method, a black liquor recovery boiler has four levels of air injection, and oxygen enrichment is applied to one or more of the tertiary or quaternary air injection levels. In another method, a black liquor boiler has three levels of air injection, with oxygen enrichment applied to at least two air injection levels. After combustion, the oxygen concentration in the resultant flue gas is sensed. The oxygen injection is then adjusted in order to maintain the sensed oxygen concentration at the previously selected oxygen set point.
    Type: Grant
    Filed: December 6, 2001
    Date of Patent: October 5, 2004
    Assignees: American Air Liquide, Inc., Air Liquide America, L.P., Jansen Combustion and Boiler Technologies, Inc.
    Inventors: Louis C. Philippe, Eric L. Duchateau, David R. Scheeff, Arie Verloop, Edward C. Dye
  • Patent number: 6752093
    Abstract: A method for operating a refuse incineration plant and to a regulating system, in which, after the fire has been fanned, the generation of heat is made more uniform by regulating at least one of the following operating parameters: refuse metering; residence time on a grate; quantitative supply of primary air; and quantitative preheating of primary air. To match the operating parameters to a varying calorific value of the refuse, the calorific value of the refuse is recorded as well as the standard regulating variables and is used to adapt the regulating device. The measure used for the calorific value is, for example, the moisture content of the flue gas generated during the incineration. Consequently, there is no need for the operator to estimate the calorific value and manually adapt the operating parameters accordingly.
    Type: Grant
    Filed: August 8, 2002
    Date of Patent: June 22, 2004
    Assignee: Von Roll Umwelttechnik AG
    Inventors: Alfons Schirmer, Josef Mercx
  • Patent number: 6745708
    Abstract: A method and/or apparatus for efficiently operating a combustion device including at least one control zone, with each control zone including at least one burner assembly, is disclosed and includes a) individually supplying fuel to each of the burner assemblies in each of the control zones, b) individually measuring a separate combustion characteristic of the collective combusted gas from each of the burner assemblies in each of the control zones, and c) individually adjusting the flow of air to each of the burner assemblies in response to the value of the combustion characteristic corresponding to each of the control zones to keep the value of each separate combustion characteristic within a predetermined range. In a preferred embodiment, primary air and secondary air are separately supplied and controlled to each of the burner assemblies in each of the control zones in response to the value of the combustion characteristic corresponding to each of the control zones.
    Type: Grant
    Filed: December 19, 2001
    Date of Patent: June 8, 2004
    Assignee: ConocoPhillips Company
    Inventors: Peter N. Slater, Jimmie Joe Straw, Bruce W. Gerhold, Ricky E. Snelling, Steven A. Owen, Kent E. Jeffers
  • Publication number: 20040103832
    Abstract: According to a conventional method for incinerating organic waste material, a fluidization device causes an oxygenous fluidizing gas to flow through the waste material, which is located in an incineration chamber, from underneath while forming a fluidized panicle layer and the waste material is incinerated. The resulting flue gas is withdrawn via an open space situated above the particle layer and is subjected to a secondary incineration in a secondary reaction zone or secondary incineration chamber. Expanding upon the prior art, the aim of the invention is enable a high throughput for the incineration material while resulting in a low level of nitrogen oxide production, and to increase the productivity for the incineration of organic waste material. To these ends, the invention provides that the fluidized particle layer (3) is concentrated with oxygen in such a manner that a mean oxygen content ranging from 0-3 vol. % is set in the open space (6).
    Type: Application
    Filed: June 16, 2003
    Publication date: June 3, 2004
    Inventors: Gerhard Gross, Paul Ludwig, Diana Wassmann, Hans-Peter Theis
  • Patent number: 6712012
    Abstract: A control system for an incineration plant, comprising an incineration furnace with a combustion path along which the material to be burned is transported, air supply means, a steam generator, and control means with a steam controller and an oxygen controller which, depending on respectively the generated amount of steam and the oxygen in the furnace, generate control signals for adjusting the size and/or speed of a stream of material in the furnace and/or adjusting the air supplied. The control signals control the generated amount of steam to a first adjusting value and via air supplied the amount of oxygen to a second adjusting value.
    Type: Grant
    Filed: September 3, 2002
    Date of Patent: March 30, 2004
    Assignee: Nederlandse Organisatie voor toegepast-natuurwetenschappelijk Onderzoek TNO
    Inventor: Lambertus Bernardus Maria van Kessel
  • Patent number: 6644222
    Abstract: The system for continuous thermal combustion of matter, such as waste, comprises an incinerator, air supply means for supplying heated air to the incinerator, and a steam generator for generating steam on the basis of heat generated in the incinerator. The system further comprising a controller which generates at least one control signal for setting the magnitude of a supply stream of the amount of material to the incinerator and/or for setting the amount of air which is supplied to the incinerator by means of the air supply means. The controller controls the at least one control signal, such that by the steam generator an amount of steam per unit time is generated which is equal to a first value and/or that by the air supply means so much air is supplied that an amount of oxygen is present in the incinerator which is equal to a second value.
    Type: Grant
    Filed: August 5, 2002
    Date of Patent: November 11, 2003
    Assignee: Nederlandse Organisatie voor toegepast-natuurwetenschappelijk Onderzoek TNO
    Inventors: Lambertus Bernardus Maria van Kessel, Martijn Leskens
  • Patent number: 6622645
    Abstract: A method and system for combustion of fuel in a boiler in which flue gasses are produced. The boiler includes a source of fuel, a source of air, and a controller for controlling the ratio of the source of air and the source of fuel inputted into the boiler. A sensor is used for measuring the concentration of oxygen in the flue gasses. The controller is adapted to calculate the amount of air entering the boiler based on the amount of oxygen in the flue gasses to thereby adjust the air to fuel ratio to include calculated air input and air input from the source of air. A preferred fuel is pulverized coal. The method and system provide for the air to fuel ratio to be adjusted to optimize efficiency as well as to minimize NOx production.
    Type: Grant
    Filed: June 15, 2001
    Date of Patent: September 23, 2003
    Assignee: Honeywell International Inc.
    Inventor: Vladimir Havlena
  • Patent number: 6532879
    Abstract: A solid fuel fed combustor system having a first chamber portion with an inlet feed for feeding a metered amount of a solid fuel thereto, a first burner stage having a first traveling conveyor firebelt, a metered amount of air introduced in progressively increasing proportions along the length of the first traveling conveyor. A second burner stage having a second traveling conveyor firebelt with air introduced in a progressively decreasing amount along the length of said second traveling conveyor firebelt and a controller for controlling air introduced to the system. The chamber has a sloped common roof section common to the burner stages and is made of radiative energy reflective fire brick and angled to reflect radiative energy generated from fuel traveling on the traveling conveyor firebelts and directing the radiative energy on fuel traveling on the first firebelt.
    Type: Grant
    Filed: February 4, 2002
    Date of Patent: March 18, 2003
    Assignee: Nathaniel Energy Corporation
    Inventor: Stan E. Abrams
  • Publication number: 20030010269
    Abstract: The invention relates to a method for operating a refuse incineration plant and to a regulating system, in which, after the fire has been fanned, the generation of heat is made more uniform by regulating at least one of the operating parameters refuse metering, residence time on a grate, quantitative supply of primary air and quantitative preheating of primary air. To match the operating parameters to a varying calorific value of the refuse, the calorific value of the refuse is recorded as well as the standard regulating variables and is used to adapt the regulating means. The measure used for the calorific value is, for example, the moisture content of the flue gas generated during the incineration. Consequently, there is no need for the operator to estimate the calorific value and manually adapt the operating parameters accordingly.
    Type: Application
    Filed: August 8, 2002
    Publication date: January 16, 2003
    Inventors: Alfons Schirmer, Josef Mercx
  • Publication number: 20030000436
    Abstract: A method and system for combustion of fuel in a boiler in which flue gasses are produced The boiler includes a source of fuel a source of air, and a controller for controlling the ratio of the source of air and the source of fuel inputted into the boiler. A sensor is used for measuring the concentration of oxygen in the flue gasses. The controller is adapted to calculate the amount of air entering the boiler based on the amount of oxygen in the flue gasses to thereby adjust the air to fuel ratio to include calculated air input and air input from the source of air. A preferred fuel is pulverized coal The method and system provide for the air to fuel ratio to be adjusted to optimize efficiency as well as to minimize NOx production.
    Type: Application
    Filed: June 15, 2001
    Publication date: January 2, 2003
    Inventor: Vladimir Havlena
  • Patent number: 6418866
    Abstract: The objective of the present invention is to provide a fluidized bed incinerator which will increase the thermal capacity of the freeboard to respond to fluctuations of the load imposed by waste matter such as sludge or garbage with a high moisture content; which would absorb local and momentary temperature spikes due to load fluctuations or variations in the characteristics of the waste material.
    Type: Grant
    Filed: April 25, 2000
    Date of Patent: July 16, 2002
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Yoshihito Shimizu, Hiroki Honda, Masao Takuma, Toshihisa Goda, Shiro Sasatani
  • Patent number: 6401633
    Abstract: An apparatus for treating organic waste material characterized by high ash content is disclosed.
    Type: Grant
    Filed: April 16, 2001
    Date of Patent: June 11, 2002
    Assignee: Minergy Corporation
    Inventor: Thomas J. Baudhuin
  • Patent number: 6389995
    Abstract: A method of combustion and a combustion plant in which absorbent is regenerated is described herein. During the combustion of a fuel in a combustion chamber enclosing a fluidized bed, a fuel and an absorbent are supplied to the fluidized bed. The combustion gases generated during the combustion are collected and purified in a separating member by separation of solid material from the combustion gases. The separated solid material is recirculated to the fluidized bed through a channel, and a gaseous medium is supplied in a controlled manner to the separated solid material present in the channel in order to displace the combustion gases and provide a chemical reaction.
    Type: Grant
    Filed: December 21, 1998
    Date of Patent: May 21, 2002
    Assignee: ABB Carbon AB
    Inventors: Christopher Adams, Jim Anderson, Mats Andersson, Roine Brännström, John Weatherby
  • Patent number: 6382110
    Abstract: A method and installation for the cremation of bodies in coffins. The coffin is placed in a crematorium furnace in the wall of which at least one burner is disposed. Conbustion occurs in a chamber of the crematorium furnace without naturally-occurring air and with the burning of the coffin supplying energy along with part of the recirculated flue gas in which oxygen has been added. The flue gas fed back to the crematorium furnace is recirculated uncooled. The temperature at the crematorium furnace is maintained by the burning coffins and the oxygen-enriched recirculated flue gas.
    Type: Grant
    Filed: April 23, 1999
    Date of Patent: May 7, 2002
    Assignee: Messr. Griesheim GmbH
    Inventor: Herbert Marz
  • Patent number: 6383297
    Abstract: Disclosed is a method for joint oxydation and heat treatment of workpieces at temperatures ≦1300° in the treatment chamber of an oven containing a neutral or reactive gas in a temperature range above 570°. In order for the process to be reproducible and to produce homogeneous oxide layers, the PH2O/PH2 ratio is adjusted after transformation of the workpiece structure such as found at the ambient temperature into the structure wanted during the heat treatment in such a way that the line FeO+H2=Fe+H2O is exceeded and an oxide layer is formed from FEO<10 &mgr;m.
    Type: Grant
    Filed: February 22, 2000
    Date of Patent: May 7, 2002
    Assignee: Messer Griesheim GmbH
    Inventor: Hans-Peter Schmidt
  • Patent number: 6336449
    Abstract: A burner system is described for burning granular pellets and similarly sized solid biomass heating fuel, e.g. wood pellets. It includes an air tight fire chamber having an exhaust outlet in an upper region thereof and a burner (10) in the bottom thereof for converting the solid fuel to fuel gases and ash in the presence of a limited air supply and combusting the gases formed. The burner comprises upright co-axial inner (12) and outer (11) cylindrical walls providing a confined central gasification/combustion chamber surrounded by an annular combustion air manifold (15). The annular combustion air manifold (15) is closed at the top and bottom with an air inlet (16) in the outer wall and a plurality of spaced aperatures (17) arranged in upward rows in the inner cylindrical wall providing air inlets from the combustion air manifold to the combustion zone of the chamber. A grate at the bottom of the gasification/combustion chamber holds the solid fuel while allowing ash to pass through the grate.
    Type: Grant
    Filed: February 4, 2000
    Date of Patent: January 8, 2002
    Assignee: Dell-Point Combustion Inc.
    Inventors: Mark Drisdelle, Claude Lapointe
  • Publication number: 20010027737
    Abstract: An energy conversion system which comprises a solid fuel fed combustor system having a first chamber portion with an inlet feed for feeding a metered amount of a solid fuel thereto, a first burner stage having a first traveling conveyor firebelt, a metered amount of air introduced in progressively increasing proportions along the length of the first traveling conveyor. A second burner stage having a second traveling conveyor firebelt with air introduced in a progressively decreasing amount along the length of said second traveling conveyor firebelt and a controller for controlling air introduced to the system. The chamber has a sloped common roof section common to the burner stages and is made of radiative energy reflective fire brick and angled to reflect radiative energy generated from fuel traveling on the traveling conveyor firebelts and directing the radiative energy on fuel traveling on the first firebelt.
    Type: Application
    Filed: August 21, 1998
    Publication date: October 11, 2001
    Inventor: STAN E. ABRAMS
  • Patent number: 6237511
    Abstract: A method of burning plant-based fuel is involved in which the plant-based fuel is burned in a boiler designed for burning dry fuel and with the plant-based fuel being used having a moisture value which can vary in range from dry to wet. The method involves heating air with heat energy from combustion gases of the boiler to provide a source of heated air and providing heat and flow amounts of the heated air, with derived heat energy from the combustion gases, to the fuel in an amount sufficient for drying the fuel in any condition presented amongst the range between dry and wet. The flow of the heated air directed to the fuel is controlled to provide sufficient drying of the fuel before use of the fuel in the boiler and such that the heated air not needed for drying the fuel is conducted into the boiler to serve as heated combustion air.
    Type: Grant
    Filed: November 18, 1998
    Date of Patent: May 29, 2001
    Inventor: Martti Honkasalo
  • Patent number: 6190160
    Abstract: The invention relates to a process for combustion of a fuel with an oxygen-rich oxidant, in a combustion chamber (3), in which, cyclically: at least one principal variable representing the combustion in the said combustion chamber (3) is measured, and, as a function of the result of the measurement of the at least one principal variable, a control instruction for regulating the flowrates of fuel and oxidant to be injected into the combustion chamber (3) is determined. Then the regulating control instruction is applied in order to make the fuel burn with the oxidant in the chamber (3). Additionally at least one secondary variable associated with an operational constraint of the combustion chamber (3) or with a perturbation in the operation of the latter is measured, and for the determination of regulating control instruction, the measurement result of the at least one secondary variable is also taken into account. The invention is useful in glass furnaces, rotary furnaces, and incineration furnaces.
    Type: Grant
    Filed: July 2, 1999
    Date of Patent: February 20, 2001
    Assignee: L'Air Liquide, Societe Anonyme pour pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Isabelle Hibon, Jean-Francois Simon
  • Patent number: 6189461
    Abstract: An incineration apparatus which can suppress the generation of dioxins, including a combustion furnace (11) for burning a combustible in combustion air within the furnace, chlorinated aromatic compound measuring device (12) for measuring an amount of a chlorinated aromatic compound generated in the combustion furnace, and control device (14, 15, 16) for monitoring the amount of the chlorinated aromatic compound generated, obtained by the measuring device (12), and varying operating conditions of the combustion furnace (11) on the basis of the monitored result, such as to decrease the amount of the chlorinated aromatic compound generated in the combustion furnace (11).
    Type: Grant
    Filed: August 4, 1998
    Date of Patent: February 20, 2001
    Assignee: NKK Corporation
    Inventors: Kunio Miyazawa, Hideki Nagano, Satoshi Fujii, Manabu Kuroda, Takashi Yokoyama, Takaaki Kondo
  • Patent number: 6155183
    Abstract: A method and apparatus retrofitted to a multiple-intertube pulverized-coal burner to reduce NO.sub.x emissions of roof fired boilers. An internal two stage process controls the amount of secondary air which flows to the burner. The first stage includes a secondary air damper and air flow station to regulate the amount of air which flows into a windbox of the burner. The second stage includes an outlet formed in the hot primary air duct, an air plenum which communicates therewith, and a plurality of interjectory air ports which correspond with the burners in number and position along a front wall of the boiler and which communicate with the air plenum. The interjectory air ports inject interjectory air into a combustion chamber of the boiler at a substantially 90 degree angle to the direction of a plurality of burner tips of each burner and supplies the balance of the required theoretical combustion air needed to complete combustion of the fuel.
    Type: Grant
    Filed: July 21, 1999
    Date of Patent: December 5, 2000
    Assignee: A E P Resources Service Company
    Inventors: Scott A. Vierstra, John J. Letcavits
  • Patent number: 5988079
    Abstract: An unburned carbon and other combustibles monitoring and control system for a fly ash producing fossil-fueled boiler, such as a pulverized coal fired boiler. An infrared imaging camera counts the moving hot particles entrained in the hot gases downstream of the furnace region of the boiler and provides a first signal representative of the number of hot particles in the hot gases over a predetermined period of time. A signal processor is connected to the infrared imaging camera for counting the hot particles for receiving the signal representative of the number of particles in the hot gases and providing a second signal representative of the mass flow of unburned carbon and other combustibles content of the fly ash produced by the boiler, the second signal being a function of the first signal.
    Type: Grant
    Filed: September 8, 1997
    Date of Patent: November 23, 1999
    Assignee: Framatome Technologies, Inc.
    Inventor: Hudson R. Carter