Exhaust Gas; E.g., Pollution Control, Etc. Patents (Class 110/345)
  • Publication number: 20100269740
    Abstract: In an exhaust gas treatment system including a denitration device that removes nitrogen oxide in exhaust gas from a heavy fuel-fired boiler, an air preheater that recovers heat in the gas after the nitrogen oxide is removed, an electric precipitator that removes dust while adding ammonia into the gas after heat recovery, a desulfurization device that removes sulfur oxide in the gas after dust removal, and a stack that exhausts the gas after desulfurization to the outside, an ash-shear-force measuring instrument is provided to measure an ash shear force, which is ash flowability, on the downstream side of the electric precipitator, so that a feed rate of an air supply unit that supplies air to the boiler is reduced according to ash shear-force information.
    Type: Application
    Filed: February 9, 2009
    Publication date: October 28, 2010
    Inventors: Naoyuki Kamiyama, Tomoo Akiyama, Toshihiko Setoguchi, Koutaro Fujimura, Yoshihisa Yamamoto, Koichi Tagami, Yasutoshi Ueda
  • Patent number: 7819656
    Abstract: A furnace, firing pattern and method of operating a heater that employs a combination of hearth burners and wall burners for the cracking of hydrocarbons is described. The firing pattern leads to improvements in the uniformity of the coil metal temperatures and vertical heat flux profiles over the firebox elevation. The hearth burners operate with a stoichiometric excess of air while the wall burners operate with less than the stoichiometric amount of air.
    Type: Grant
    Filed: May 18, 2007
    Date of Patent: October 26, 2010
    Assignee: Lummus Technology Inc.
    Inventors: Peter R Ponzi, Francesco Bertola, Robert J Gartside
  • Publication number: 20100263577
    Abstract: The present invention provides improved boiler assemblies (10) with enhanced pollution abatement properties through injection and recycling of particulate sorbent materials including sodium bicarbonate, trona, and mixtures thereof. The assemblies (10) include a boiler (12), economizer (14), air heater (15), and recirculation reactor (16). Fresh sorbent material is introduced via assembly (60) into the boiler assembly (10) at one or more injection locations, and serves to sorb NOx, SOx, and other pollutants in the flue gas. The flue gas and entrained sorbent material then pass through reactor (16) for separation of sorbent, which is then recycled for injection back into the assembly (10) upstream of reactor (16). The present invention can also be used in industrial applications where the same emissions are generated and are needed to be controlled. Examples of such applications are Cement and Lime Kilns.
    Type: Application
    Filed: April 21, 2009
    Publication date: October 21, 2010
    Applicant: Industrial Accessories Company
    Inventor: Pramodh Nijhawan
  • Publication number: 20100242811
    Abstract: A carbon fuel combustion process, employing an air gas separation unit, a combustion unit operating either with air or with an oxidizer leaner in nitrogen than air, coming from the air gas separation unit, and a unit for compressing and/or purifying the CO2 coming from the combustion flue gas, wherein the power consumed by the air gas separation unit and/or the flow of oxygen produced by the air gas separation unit and/or the capture of the CO2 coming from the combustion flue gas are variable over time is presented.
    Type: Application
    Filed: November 25, 2008
    Publication date: September 30, 2010
    Applicant: L'Air Liquids Societe Anonyme Pour L'Etude Et L'Exploitation Des Procedes Georges Claude
    Inventors: Philippe Court, Arthur Darde, Jean-Pierre Tranier, Patrick Le Bot, Jean-Mac Tsevery
  • Publication number: 20100242815
    Abstract: A sealpot for a combustion power plant includes a downcomer standpipe which receives solids of the combustion power plant, a bed including a first end and a second opposite end, the first end connected to the downcomer standpipe, a discharge standpipe disposed at the second opposite end of the bed, and an orifice plate disposed between the bed and the discharge standpipe separating the discharge standpipe from the bed. The orifice plate includes apertures disposed at a height above the bed which allow transport of fluidized solids and gas through the orifice plate.
    Type: Application
    Filed: March 29, 2010
    Publication date: September 30, 2010
    Inventors: John H. Chiu, Bard C. Teigen
  • Patent number: 7794524
    Abstract: A method and apparatus for removing purifying vaporizable contaminants such as mercury from a particulate material. Particulate material is first contacted with heated gases to vaporize the contaminants and entrain the material in the gases. The gases are directed to a first dust collector to remove the entrained particulates, after which a sorbent or chemical reagent is injected in the gases to interact with the contaminants and form a contaminant containing product that is entrained in the gases. The product is then separated from the gases in a second collector.
    Type: Grant
    Filed: February 5, 2008
    Date of Patent: September 14, 2010
    Assignee: F L Smidth A/S
    Inventors: Ove Lars Jepsen, Peter T. Paone, III, John S. Salmento
  • Publication number: 20100223926
    Abstract: A pulverized coal thermal power generation system that significantly reduces the amount of NOx emissions from a boiler and does not require a denitration unit is provided. When a denitration unit is not used, performance to remove mercury from a boiler waste gas is reduced. A waste gas purification system for a pulverized coal boiler, that compensates for this is provided. A pulverized coal boiler having a furnace for burning pulverized coal, burners for supplying pulverized coal and air used for combustion into the furnace so as to burn the pulverized coal in an insufficient air state and after-air ports provided on the downstream side of the burners for supplying air used for perfect combustion characterized in that, an air ratio in the furnace is 1.05 to 1.14, and the residence time of a combustion gas from the burner disposed on the uppermost stage to a main after-air port is 1.1 to 3.3 seconds.
    Type: Application
    Filed: May 14, 2008
    Publication date: September 9, 2010
    Applicant: Babcock-Hitachi K.K.
    Inventors: Hisayuki Orita, Masayuki Taniguchi, Akihito Orii, Yuki Kamikawa, Hirofumi Okazaki
  • Publication number: 20100212555
    Abstract: An oxyfuel combustion boiler plant having a first boiler and a second boiler for injecting gas including oxygen in higher concentration than that in the air, gas including carbon dioxide in higher concentration than that in the air, and fuel from a burner and generating steam by combustion gas in a furnace, respectively, comprising: an exhaust gas supply pipe for supplying exhaust gas discharged from the first boiler to a burner of the second boiler, and a gas flow rate control apparatus for controlling a flow rate of exhaust gas flowing through the exhaust gas supply pipe.
    Type: Application
    Filed: February 18, 2010
    Publication date: August 26, 2010
    Applicant: Hitachi, Ltd.
    Inventors: Akihiro YAMADA, Tsuyoshi Shibata, Yoshiharu Hayashi
  • Patent number: 7780765
    Abstract: A method for removing mercury from flue gases generated by the combustion of coal comprises: storing a starter batch of activated carbon in an agglomerated state; de-agglomerating the starter batch in a separation device to create a contact batch of activated carbon; transporting the contact batch to a contact location; injecting the contact batch into contact with the flue gas at a contact location having a temperature between 400° F. and 1100° F., whereupon the activated carbon of the contact batch adsorbs mercury from the flue gas; and removing the activated carbon having mercury adsorbed thereon from the flue gas. The transporting step is conducted with substantially no intermediate storage of the contact batch following the de-agglomeration of the starter batch to prevent re-agglomeration of the activated carbon prior to injection.
    Type: Grant
    Filed: June 30, 2008
    Date of Patent: August 24, 2010
    Assignee: ALSTOM Technologies Ltd
    Inventors: Srivats Srinivasachar, Shin G. Kang, Kurt W. Johnson
  • Publication number: 20100205964
    Abstract: A system and method for configuring a steam turbine in a power plant to supply steam from a low pressure section of the steam turbine to a flue-gas processing unit in the power plant.
    Type: Application
    Filed: February 13, 2009
    Publication date: August 19, 2010
    Applicant: General Electric Company
    Inventors: Alan Donn Maddaus, Gregory Paul Wotzak, James Nicolas Adelman
  • Patent number: 7775166
    Abstract: A process for improving the operation of combustors includes the steps of burning a carbonaceous fuel in a combustor system and determining combustion conditions within the combustor system that can benefit from a targeted treatment additive, wherein the determinations are made by calculation including computational fluid dynamics and observation. The process further includes locating introduction points in the combustor system where introduction of the targeted treatment additive could be accomplished. Based on the previous steps, a treatment regimen for introducing the targeted treatment additive to locations within the combustor system results in one or more benefits selected from the group consisting of reducing the opacity of plume, improving combustion, reducing slag, reducing LOI and/or unburned carbon, reducing corrosion, and improving electrostatic precipitator performance. The targeted treatment additive comprises an alloy represented by the following generic formula (Aa)n(Bb)n(Cc)n(Dd)n(. . .
    Type: Grant
    Filed: March 16, 2007
    Date of Patent: August 17, 2010
    Assignee: Afton Chemical Corporation
    Inventors: Allen A. Aradi, Joseph W. Roos, Michael W. Meffert
  • Patent number: 7766997
    Abstract: The subject matter disclosed herein relates to a method of reducing an amount of mercury discharged to an environment in a flue gas (12) generated by combustion of a fuel source. The method includes contacting the flue gas with a moist pulverous material upstream of a particle separator (24), mixing powdered activated carbon (PAC) in an amount between about 0.5 lb/MMacf and 10 lbs/MMacf with the flue gas (12) upstream of the particle separator (24), wherein the PAC interacts with at least a portion of mercury containing compounds in the flue gas (12), and separating the mercury containing compounds from the flue gas (12) containing the moist pulverous material and PAC, thereby reducing an amount of mercury in the flue gas (12).
    Type: Grant
    Filed: December 21, 2007
    Date of Patent: August 3, 2010
    Assignee: ALSTOM Technology Ltd
    Inventor: Leif A. V. Lindau
  • Publication number: 20100186643
    Abstract: A device for increasing service life of a combustion installation is disclosed. The combustion installation has a gas-conducting component and a conducted gas has dirt particles. The gas-conducting component has a layer which is partially detached together with the dirt particles of the gas when the layer is impinged with the gas and when a dirt particle is deposited on the layer.
    Type: Application
    Filed: October 5, 2007
    Publication date: July 29, 2010
    Inventors: Frank Hannemann, Berthold Köstlin, Rainer Nies
  • Publication number: 20100186645
    Abstract: An embodiment is an emissions reduction system for exhaust gases. The emissions reduction system includes a reaction chamber with one or more parallel flow tubes. Each parallel flow tube includes a heating element to heat exhaust gases to oxidize PICs and other pollutants contained in and/or carried by the exhaust gases. The reaction chamber may also include an adjustable bypass for the exhaust gases to variably bypass the parallel flow tubes. The reaction chamber may further include an oxidizing agent injector to improve the oxidation of the PICs and other pollutants in the reaction chamber. The emissions reduction system of an embodiment may further include a catalyst bed in fluid communication with the reaction chamber to further reduce emissions.
    Type: Application
    Filed: December 23, 2009
    Publication date: July 29, 2010
    Inventor: Paul E. Tiegs
  • 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
  • Patent number: 7756591
    Abstract: A method and apparatus for optimizing air flow to a boiler of a power generating unit using advanced optimization, modeling, and control techniques. Air flow is optimized to maintain flame stability, minimize air pollution emissions, and improve efficiency. An optimizer determines optimal setpoint values for manipulated variables associated with the power generating unit by using a model to minimize the value of a cost function while observing at least one constraint associated with operation of the power generating unit.
    Type: Grant
    Filed: April 25, 2006
    Date of Patent: July 13, 2010
    Assignee: Pegasus Technologies, Inc.
    Inventors: Jianhu Jia, Stephen Piche, W. Hardey Beaver
  • Publication number: 20100139536
    Abstract: A method and a plant for capturing CO2 from an exhaust gas from combustion of carbonaceous material are described. At least a part of the combustion gas is introduced into a biol fuel boiler as an oxygen containing gas, to increase the concentration of CO2 and decrease the oxygen concentration in the gas before introduction into an absorption column for separation of CO2.
    Type: Application
    Filed: April 18, 2008
    Publication date: June 10, 2010
    Inventors: Simon Woodhouse, Oscar Fredrik Graff
  • Patent number: 7731781
    Abstract: The invention provides methods and apparatuses for removing aerosols and, in some cases, vapor phase contaminants, such as mercury, from a gas stream. One method is directed to the removal of additional aerosols from a gas stream from which aerosols have previously been removed by using a screen in combination with a primary aerosol collection device. Another method is directed to the removal of both aerosols and vapor phase contaminants by using a sorbent in combination with a screen. Another method is directed to the removal of vapor phase contaminants by using a catalyst to convert the contaminant to a form that is more easily removed from the gas stream and optionally injecting a chemical to increase the rate of conversion. The invention also provides various apparatuses for use in performing the various methods of the invention.
    Type: Grant
    Filed: September 14, 2007
    Date of Patent: June 8, 2010
    Assignee: Electric Power Research Institute, Inc.
    Inventors: Mark Simpson Berry, Ramsay Chang
  • Patent number: 7731780
    Abstract: A system for treating a contaminated gas stream is provided that includes a comminution device 204 operable to effect size reduction of a plurality of sorbent particles and form a plurality of comminuted particles, a plurality of nozzles 224 distributed through the gas stream and operable to introduce the plurality of comminuted particles into the gas stream, and a particle removal device 104 operable to remove at least most of the introduced comminuted particles and form a treated gas stream. The comminution device is in direct fluid communication with the nozzles.
    Type: Grant
    Filed: August 8, 2007
    Date of Patent: June 8, 2010
    Assignee: ADA Environmental Solutions, LLC
    Inventors: Michael D. Durham, Cameron E. Martin
  • Patent number: 7727307
    Abstract: A method of removing mercury from flue gases from combustion plants, such as for example power plants or waste incineration plants, is achieved in which mercury-containing flue gases are brought into contact with an adsorption reagent either directly or indirectly by being contained in an absorption reagent, whereby mercury is substantially adsorbed by the adsorption reagent during this contact. After adsorption has occurred the adsorption reagent is separated from the flue gases and subsequently from the absorption reagent and added to an aqueous solution containing an oxidizing agent, whereby the adsorbed mercury dissolves as Hg2+. The Hg2+-containing solution is subsequently separated from the adsorption agent and the Hg2+ then is removed from the solution. This method enables the mercury to be removed from flue gas in a simple and economical manner.
    Type: Grant
    Filed: April 14, 2008
    Date of Patent: June 1, 2010
    Assignee: Evonik Energy Services GmbH
    Inventor: Hermann Winkler
  • Publication number: 20100126395
    Abstract: Power is produced using fuel, preferably with a sulfur content larger than 1% wt, from raw and/or preprocessed oil residues which are burned alone, i.e. without any addition of sorbents, diluents or the like, with a CFB boiler, a pitch boiler or a downshot boiler to generate high pressure steam and/or power and residual emissions. Residual emissions are cleaned to simultaneously remove PM, NOx and SO2 therefrom. The sulfur in emissions can be used to produce sulfuric acid. The process uses a low cost fuel, generates steam, and/or power and sulfuric acid and meets all emission requirements for PM, NOx and SO2.
    Type: Application
    Filed: January 21, 2010
    Publication date: May 27, 2010
    Inventor: Richard Gauthier
  • Publication number: 20100116183
    Abstract: An in-furnace combustion application process method and apparatus reduces nitrogen oxides in flue gas by injecting a bitumen, carbon residue or an asphalt water emulsion or a mixture thereof into flue gas so that the three types of emulsions (injected individually or as a blend) mixes with said flue gas. The emulsions are preferably atomized before injection and may also be injected in jet streams.
    Type: Application
    Filed: December 7, 2009
    Publication date: May 13, 2010
    Inventor: George C. Dusatko
  • Patent number: 7713503
    Abstract: A system for removing mercury from combustion gas. The system includes a combustion device, a stack, and a duct system that couples the combustion device to the stack. The system further comprises an injection system that is coupled to the duct system. The injection system injects sorbents including alkali-based sorbents and carbon-based sorbents into the duct system.
    Type: Grant
    Filed: September 12, 2006
    Date of Patent: May 11, 2010
    Assignee: General Electric Company
    Inventors: Peter Martin Maly, William Randall Seeker, Vitali Victor Lissianski, Bradley S. Rogers
  • Patent number: 7708964
    Abstract: Pollution control substances may be formed from the combustion of oil shale, which may produce a kerogen-based pyrolysis gas and shale sorbent, each of which may be used to reduce, absorb, or adsorb pollutants in pollution producing combustion processes, pyrolysis processes, or other reaction processes. Pyrolysis gases produced during the combustion or gasification of oil shale may also be used as a combustion gas or may be processed or otherwise refined to produce synthetic gases and fuels.
    Type: Grant
    Filed: July 27, 2006
    Date of Patent: May 4, 2010
    Assignee: Battelle Energy Alliance, LLC
    Inventors: Richard D. Boardman, Robert A. Carrington
  • Publication number: 20100101464
    Abstract: A method for operating a fluidized-bed reactor includes introducing an alkali-containing material into a fluidized-bed reactor and introducing hydrous clay into the fluidized-bed reactor, the hydrous clay having a moisture content of at least about 5% by weight. The method further includes heating at least a portion of the alkali-containing material and hydrous clay, such that at least a portion of the hydrous clay is at least partially calcined and the at least partially calcined clay adsorbs at least a portion of alkali present in the fluidized-bed reactor. The method further includes removing at least a portion of the at least partially calcined clay and adsorbed alkali from the fluidized-bed reactor.
    Type: Application
    Filed: November 3, 2008
    Publication date: April 29, 2010
    Inventors: Billie E. Leach, Thomas E. Landon
  • Publication number: 20100101462
    Abstract: An oxyfuel boiler 1 is equipped with an oxygen separation apparatus 23 to produce oxygen by separating oxygen from the air, a recirculation fan 26 to supply a portion of combustion flue gas branched from the combustion flue gas discharged from the boiler to the oxyfuel boiler 1, a temperature sensor 14a to detect gas temperature at a boiler outlet 1d in the oxyfuel boiler 1, and a control apparatus 150 to calculate gas temperature at a furnace outlet 1c in the boiler from the gas temperature at the boiler outlet 1d detected by the temperature sensor 14a and control the operating condition of the recirculation fan 26 so that the calculated gas temperature at the furnace outlet 1c becomes a desired preset gas temperature.
    Type: Application
    Filed: October 19, 2009
    Publication date: April 29, 2010
    Applicant: Hitachi, Ltd.
    Inventors: Yoshiharu Hayashi, Akihiro Yamada, Tsuyoshi Shibata
  • Patent number: 7691344
    Abstract: An oil reconversion devices 1a and 1b for waste plastics which thermally crack a waste plastic Ro by heating it and converts a generated cracker gas Gr into oil by cooling it, equipped with a thermal cracking bath 2 which has a bath main body 4 placed inside a coil 3 . . . , induction-heats the bath main body 4 by feeding a high-frequency current through the coil 3 . . . , and thermally cracks at least a molten plastic Rd obtained from the waste plastic Ro to generate the cracker gas Gr, an injection port 5 through which the waste plastic Ro is injected, a feeder 6 which supplies the waste plastic Ro injected through this injection port 5 to the thermal cracking bath 2 via a forced or direct feeding means Ua or Ub without a bath, and an oil conversion processor 7 which cools and converts the cracker gas Gr generated by the thermal cracking bath 2 into oil.
    Type: Grant
    Filed: January 12, 2005
    Date of Patent: April 6, 2010
    Inventor: Takeki Yoshimura
  • Publication number: 20100077946
    Abstract: An oxy/fuel combustion system having a furnace arranged and disposed to combust a fuel to form a combustion fluid. The system further includes a convective section having at least one heat exchanger arranged and disposed to exchange heat between the combustion fluid and steam for use in a steam turbine. A flue gas recycle is arranged and disposed to recycle at least a portion of the combustion fluid as a recycled flue gas, the flue gas recycle having at least two expellant locations downstream of a primary combustion zone. The system includes a flow control mechanism that provides controlled amounts of the recycled flue gas to the at least two expellant locations to control temperature of the steam.
    Type: Application
    Filed: September 26, 2008
    Publication date: April 1, 2010
    Inventor: Mark Daniel D'Agostini
  • Publication number: 20100077947
    Abstract: A method of combusting sulfur-containing fuel in a circulating fluidized bed boiler includes the steps of (a) feeding sulfur-containing fuel into a furnace of the circulating fluidized bed boiler, (b) combusting the fuel with oxidant gas consisting essentially of pure oxygen and circulated exhaust gas, so as to form exhaust gas having carbon dioxide and water as its main components, and (c) feeding calcium carbonate containing material into the furnace so as to capture sulfur dioxide into calcium sulfate in the furnace. The temperature in the furnace is maintained above 870° C.
    Type: Application
    Filed: September 26, 2008
    Publication date: April 1, 2010
    Inventor: Horst Hack
  • Publication number: 20100077942
    Abstract: The disclosure includes a combustion system including a primary reactor arranged and disposed to receive a solid fuel and a first oxygen stream and deliver a first substantially gaseous product and a substantially solid or molten product, a secondary reactor in fluid communication with the primary reactor, and a furnace in fluid communication with the secondary reactor.
    Type: Application
    Filed: September 26, 2008
    Publication date: April 1, 2010
    Inventors: Mark Daniel D'Agostini, Jeffrey William Kloosterman
  • Publication number: 20100077943
    Abstract: A combustion system having a furnace arranged and disposed to receive solid fuel and oxygen and combust the solid fuel and oxygen to form a flue gas. The system includes a heat exchanger arrangement arranged and disposed to receive heat from the flue gas, where the heat exchanger arrangement has a predetermined heat exchange capacity. A water injection arrangement is arranged and disposed to provide water to the flue gas to controllably adjust the flue gas mass flow rate and temperature to provide the predetermined heat exchange capacity.
    Type: Application
    Filed: September 26, 2008
    Publication date: April 1, 2010
    Inventors: Kevin Boyle Fogash, Xianming Jimmy Li
  • Publication number: 20100077945
    Abstract: An oxy/coal combustion system and method include a furnace arranged and disposed to receive and combust a first solid fuel to form a combustion fluid, a convective section having one or more inlet devices, the convective section arranged and disposed to receive and combust a second fuel in the presence of the oxygen, and one or more heat exchangers arranged and disposed to exchange heat with the combustion fluid.
    Type: Application
    Filed: September 26, 2008
    Publication date: April 1, 2010
    Inventors: Reed Jacob Hendershot, Aleksandar Georgi Slavejkov, Mark Daniel D'Agostini, Kevin Boyle Fogash, Jeffrey William Kloosterman
  • Publication number: 20100077944
    Abstract: A precombustor having a chamber having a first end and a second end, and an inlet configured to deliver a substantially parallel flow of solid fuel surrounded by oxygen at the first end. The first end further includes a recirculation step and the second end fluidly communicates with a furnace. The inlet and the recirculation step are arranged to form a recirculation zone of at least a portion of the solid fuel and the oxygen. A combustion system and method for operating a combustion system are also disclosed.
    Type: Application
    Filed: September 26, 2008
    Publication date: April 1, 2010
    Inventors: Aleksandar Georgi Slavejkov, Xiaoyi He, Mark Daniel D'Agostini, Reed Jacob Hendershot
  • Publication number: 20100058962
    Abstract: A method is provided for injecting a substance into a boiler of a waste incineration plant using a gaseous propellant, the substance being conducted, starting from at least one distributor, via lines which branch off from the distributor, in each case to a nozzle which is assigned to the respective line and by means of which the substance and the propellant are injected into the boiler. The substance quantity to be conducted to the respective nozzle is set in the distributor. The boiler is subdivided into multiple boiler sectors, in which the nozzles are arranged in a plurality of horizontal nozzle planes. To each boiler sector at least one separate distributor is assigned. The substance and the propellant are combined upstream of the branch-off with the respective line.
    Type: Application
    Filed: September 21, 2009
    Publication date: March 11, 2010
    Inventor: Roland HALTER
  • Publication number: 20090314190
    Abstract: A hot oxygen stream containing radicals is fed into a gas stream, such as a catalyst regenerator flue gas stream, that contains carbon monoxide to convert carbon monoxide to carbon dioxide.
    Type: Application
    Filed: June 18, 2008
    Publication date: December 24, 2009
    Inventors: Kuang-Tsai Wu, Lee Rosen, David Lenhert, Christopher Leger
  • Patent number: 7621154
    Abstract: A method for supplying heat to a melting furnace for forming a molten product using ash-containing fuels. A fuel having an ash component is introduced into a slagging chamber of a slagging combustor and at least partially combusted with a first oxidant mixture and a second oxidant mixture within the slagging chamber. Ash component is collected as a layer of molten slag in the slagging chamber. Slagging combustor gas effluent is passed from the slagging chamber of the slagging combustor into the combustion space of the melting furnace at high temperature to supply heat to form the molten product. Molten slag is withdrawn from the slagging chamber of the slagging combustor and may be selectively introduced into the melting furnace or not introduced into the melting furnace.
    Type: Grant
    Filed: May 2, 2007
    Date of Patent: November 24, 2009
    Assignee: Air Products and Chemicals, Inc.
    Inventor: Mark Daniel D'Agostini
  • Publication number: 20090277363
    Abstract: An oxyfuel boiler system, comprising: an oxygen generator to separate oxygen from air; a coal supply unit to dry and pulverize coal; a burner having a fuel feed path for feeding pulverized coal supplied from the coal supply unit and an oxidizer feed path for feeding oxidizer; a boiler provided with the burner; an exhaust gas discharge line to discharge exhaust gas generated in the boiler into environment; an exhaust gas treatment apparatus provided in the exhaust gas discharge line, a CO2 separator provided downstream of the exhaust gas treatment apparatus in the exhaust gas discharge line to separate CO2 from the exhaust gas; an exhaust gas recirculation line including an exhaust gas tapping port provided in the exhaust gas discharge line to extract a part of the exhaust gas; and an oxygen supply line to supply the oxygen generated at the oxygen generator to the exhaust gas flowing through the exhaust gas recirculation line, wherein the exhaust gas treatment apparatus is provided with at least an SO3 removin
    Type: Application
    Filed: May 5, 2009
    Publication date: November 12, 2009
    Applicant: Hitachi, Ltd.
    Inventors: Tsuyoshi SHIBATA, Masayuki TANIGUCHI, Hisayuki ORITA, Osamu ITO
  • Patent number: 7615101
    Abstract: An apparatus and method for controlling mercury emissions in the gas stream from a fuel fired system includes a chamber for creating dissociated halogen to be supplied to the gas stream, with or without carbonaceous material.
    Type: Grant
    Filed: September 7, 2005
    Date of Patent: November 10, 2009
    Assignee: Energy & Environmental Research Foundation
    Inventors: Michael J. Holmes, John H Pavlish, Edwin S. Olson, Ye Zhuang
  • Publication number: 20090255450
    Abstract: A new and unique boiler and method of transition between air and Oxy-combustion in a coal fired combustion process wherein near pure oxygen may be introduced to the boiler furnace in several locations including directly into the flame through the burner and/or directly into the furnace as nearly pure oxygen, and/or into the recycle flue gas streams to the burners, including both primary and secondary streams.
    Type: Application
    Filed: April 13, 2009
    Publication date: October 15, 2009
    Inventors: Bryan B. Stone, Denny K. McDonald, Allan J. Zadiraka
  • Patent number: 7600479
    Abstract: A method to reduce mercury in gas emissions from the combustion of coal is disclosed. Mercury emissions can be reduced by staging combustion process and/or reducing boiler excess oxygen. Fly ash formed under combustion staging conditions is more reactive towards mercury than fly ash formed under typical combustion conditions. Reducing boiler excess oxygen can also improve ability of fly ash to adsorb mercury.
    Type: Grant
    Filed: September 29, 2005
    Date of Patent: October 13, 2009
    Assignee: General Electric Company
    Inventors: Vitali Victor Lissianski, Peter Martin Maly, William Randall Seeker, Roy Payne, Vladimir M. Zamansky, Loc Ho
  • Publication number: 20090249988
    Abstract: An oxycombustion apparatus comprising an air separation unit (2) in which oxygen (10) is produced optionally by cryogenic distillation, an oxycombustion boiler (1), means for sending the oxygen and a fuel (14) to the oxycombustion boiler, means (19) for recovering carbon dioxide-containing flue gases from the oxycombustion boiler, and means (7) for purifying the flue gases in order to extract carbon dioxide therefrom, the air separation unit being provided for producing oxygen to be sent to the boiler having a purity not exceeding 95 mol %.
    Type: Application
    Filed: August 25, 2008
    Publication date: October 8, 2009
    Applicant: L'Air Liquide Societe Anonyme Pour L'Etude et l'Exploitation Des Procedes Georges Claude
    Inventor: Benoit Davidian
  • Publication number: 20090252665
    Abstract: An apparatus and method for achieving increased NOx removal efficiency from an emissions control portion of a fossil fuel fired boiler while controlling ammonia slip provides excess levels of ammonia above those levels conventionally employed in SCR and/or SNCR applications. The apparatus and methods comprise, in part, use of a NOx reduction system comprising at least one selective catalytic reduction system which receives ammonia in higher amounts than conventional practice from an upstream ammonia injection point, and an ammonia reduction system positioned downstream of one or more ammonia injection points and the NOx reduction system. The excess ammonia achieves increased NOx removal, while the ammonia reduction system contains at least one ammonia destruction catalyst which permits the NOx reduction system to be operated at an increased NOx removal efficiency without a corresponding increase in ammonia slip.
    Type: Application
    Filed: April 7, 2008
    Publication date: October 8, 2009
    Inventors: William Downs, Larry A. Hiner, Xiaoyu Guo
  • Patent number: 7597864
    Abstract: Ammonia and optionally carbon monoxide are injected into the flue gas containing metals such as mercury in a manner so that there are sufficient amounts of these materials in the flue gas when the flue gas is at a temperature of from 900° F. to 1,450° F. to oxidize the metals within the flue gas. The oxidized metals are then attracted to particulates present in the flue gas. Oxidation is facilitated by a reaction zone stabilizer through which the flue gas flows. The stabilizer provides a stable continuous ignition front. These particulates bound with oxidized metals are removed from the flue gas by a particulate removal device such as an electrostatic precipitator or baghouse. After the ammonia is injected, the flue gas can be rapidly cooled to a temperature below 500° F. to minimize decomposition of oxidized metals in the flue gas.
    Type: Grant
    Filed: July 16, 2004
    Date of Patent: October 6, 2009
    Assignee: Breen Energy Solutions
    Inventors: Bernard P. Breen, Robert A. Schrecengost
  • Patent number: 7596952
    Abstract: A process is disclosed for recycling carbon dioxide emissions from a fossil-fuel power plant into useful carbonated species The process primarily comprises the steps of: a) burning the fossil fuel, thereby generating heat and a hot exhaust gas containing CO2; and b) converting the heat into energy. The process is characterized in that it further comprises the steps of: c) cooling the exhaust gas; and d) biologically transforming the CO2 contained in the cooled exhaust gas into carbonated species, thereby obtaining a low CO2 exhaust gas and producing useful carbonated species. The low CO2 exhaust gas obtained in step d) can be released in the atmosphere without increasing the problem of greenhouse effect.
    Type: Grant
    Filed: September 29, 2003
    Date of Patent: October 6, 2009
    Assignee: CO2 Solution Inc.
    Inventors: Sylvie Fradette, Jean Ruel
  • Patent number: 7597743
    Abstract: A plant includes an adsorber in which a metal is plated onto a non-metallic sacrificial materials from a metal carbonyl at a predetermined temperature. Particularly preferred adsorbers include two sections, wherein a first metal (e.g., nickel) is plated onto graphite in the first section, and wherein a second metal (e.g., iron) is plated onto graphite in the second section.
    Type: Grant
    Filed: January 21, 2004
    Date of Patent: October 6, 2009
    Assignee: Fluor Technologies Corporation
    Inventor: Ravi Ravikumar
  • Publication number: 20090241814
    Abstract: Heat can be recovered from hot gas produced in a thermal reactor (1), by injecting water into the gas at one or more injection zones (4) in such an amount and in such a way that the gas temperature due to water evaporation is reduced to below 400° C., preferably below 300° C., possibly below 150-200° C., and the gas dew point becomes at least 60° C., preferably at least 70° C., possibly 80 or 85° C. The gas can then be led through a condensing heat exchanger unit (8), where at least some of the gas contents of water vapour are condensed, and the condensing heat can be utilized for heating of a stream of fluid, mainly water. Hereby, a method for production of hot water is obtained, which is cheap and simple and has low maintenance costs, and which moreover has a high efficiency degree and good environmental qualities The method can be used for a broad spectrum of fuels and conversion technologies.
    Type: Application
    Filed: September 27, 2006
    Publication date: October 1, 2009
    Applicant: Dall Energy Holding ApS
    Inventor: Jens Dall Bentzen
  • Publication number: 20090235848
    Abstract: A method of reducing particulate matter and mercury emissions in a combustion flue gas includes, in an exemplary embodiment, combusting a fuel resulting in generation a flue gas flow, cooling the flue gas flow within a duct, positioning a flow conditioning apparatus within the duct, enhancing a reaction rate of the mercury and carbon-containing fly ash particles by directing the flue gas flow through the flow conditioning apparatus to mix the carbon-containing fly ash particles and mercury within the flue gas flow and to facilitate at least one of oxidation of the mercury and binding the mercury to the carbon-containing fly ash particles, collecting a portion of the carbon-containing fly ash particles in the flow conditioning apparatus, and directing the flue gas flow to a particulate collection device to remove the remaining portion of the fly ash particles from flue gas flow.
    Type: Application
    Filed: March 24, 2008
    Publication date: September 24, 2009
    Inventors: Boris Nikolaevich Eiteneer, Robert Warren Taylor, Vitali Lissianski, James Easel Roberts
  • Patent number: 7581945
    Abstract: A system, a method, and an article of manufacture for adjusting CO emission levels in predetermined locations in a boiler system are provided. The boiler system has a plurality of burners and a plurality of CO sensors disposed therein. The system determines locations within the boiler system that have relatively high CO levels utilizing the plurality of CO sensors and then adjusts A/F ratios of burners affecting those locations to decrease the CO levels at the locations.
    Type: Grant
    Filed: November 30, 2005
    Date of Patent: September 1, 2009
    Assignee: General Electric Company
    Inventors: Neil Colin Widmer, Avinash Vinayak Taware, Ivy Wai Man Chong
  • Publication number: 20090211503
    Abstract: A combustor 110 is operative to effect therewith the combustion of fossil fuel 114? in order to thereby both heat to a working fluid 102 and generate a flue gas 104. An air preheater 144 receives the flue gas 104 generated in the combustor 110. A blower 180 causes air 188 to flow to the air preheater 144 when operating in an air fired mode, and causes both O2 and recycled flue gas 188? to flow when operating in the O2 firing mode. The air preheater 144 is operative to transfer heat from the flue gas 150 received thereby to the air 188 that is received when operating in an air fired mode or to both the received O2 and the recycled flue gas 188? that is received when operating in the O2 firing mode in order to thereby effect a preheating of the air 188 or of both the O2 and recycled flue gas, 188? depending upon the specific nature of the mode of operation thereof, and to thereby effect therewith a cooling of the flue gas received thereby.
    Type: Application
    Filed: February 25, 2009
    Publication date: August 27, 2009
    Applicant: ALSTOM Technology Ltd
    Inventors: Herbert E. Andrus, JR., Gregory N. Liljedahl, John L. Marion, Nsakala Ya Nsakala
  • Patent number: 7574968
    Abstract: A method and apparatus is provided for use in combustion system for capturing gas phase pollutants such as SO3. In one example, the invention uses a computer model to model the combustion system. Particles are injected into the combustion system to capture the gas phase pollutants. The model is used to determine the injection location, as well as the size and amount of the particles to be injected.
    Type: Grant
    Filed: September 19, 2003
    Date of Patent: August 18, 2009
    Assignees: Energy & Environmental Research Center, Marsulex Environmental Technologies Corporation, Alstom Technolog Ltd
    Inventors: Donald McCollor, Steven Benson, Bernard Hamel, Robin Rhodes