Including Pump Patents (Class 110/206)
  • Patent number: 9353944
    Abstract: A system for the combustion of high solids liquid to produce steam for the production of ethanol is disclosed. The system comprises a method for combusting high solids liquid. The method comprises supplying a stream of high solids liquid to a furnace; atomizing the stream of high solids liquid into the furnace; and distributing biomass fuel into the furnace. The stream of high solids liquid are combusted with the biomass fuel in the furnace.
    Type: Grant
    Filed: September 3, 2010
    Date of Patent: May 31, 2016
    Assignee: POET Research, Inc.
    Inventor: James M. Geraets
  • Publication number: 20150083032
    Abstract: Combustion system. The system includes a combustor generating a combustion gas and a splitter for receiving the combustion gas and dividing the combustion gas into first and second gas streams. A temperature controller receives the first gas stream, mixes it with recycled gas and introduces it into a heat recovery steam generator at a desired temperature. A mixer receives the second gas stream, mixes it with recycled gas and introduces it into the heat recovery steam generator. The cool gas that exits the heat recovery steam generator forms the recycled gas. A suitable combustor is an oxy-coal combustor.
    Type: Application
    Filed: September 8, 2014
    Publication date: March 26, 2015
    Inventors: Hussam Zebian, Alexander Mitsos
  • Patent number: 8695514
    Abstract: An air infiltration abatement system (300) for a power plant (10) includes a recirculated flue gas source (175), a recirculated flue gas supply line (310) connected to the recirculated flue gas source (175) and a power plant component. The power plant component has a leakage area in fluid communication with the recirculated flue gas supply line (310). The recirculated flue gas source (175) receives a combustion flue gas (75) from an oxygen fired boiler (20) of the power plant (10), and provides the combustion flue gas (75) to the recirculated flue gas supply line (310). The recirculated flue gas supply line (310) supplies the combustion flue gas (75) as a recirculated flue gas (330) to the oxygen fired boiler (20) via the leakage area of the power plant component.
    Type: Grant
    Filed: May 14, 2009
    Date of Patent: April 15, 2014
    Assignee: Alstom Technology Ltd.
    Inventors: Glen D. Jukkola, Gregory N. Liljedahl, Nsakala Ya Nsakala, Mark Palkes
  • Publication number: 20140065561
    Abstract: A tangentially-fired furnace for the burning of anthracite is disclosed. The furnace may contain a boiler with a chamber having four corners. Four burner groups located at the four corners may be configured to eject pulverized coal flow into the chamber for combustion, in order to form a single fireball substantially at the center of the chamber during combustion. Each burner group may contain a first burner which includes primary-air/rich-portion nozzles for ejecting rich-portion coal flow into a lower section of the chamber, and a second burner which includes primary-air/thin-portion nozzles for ejecting thin-portion coal flow into a higher section of the chamber.
    Type: Application
    Filed: March 17, 2013
    Publication date: March 6, 2014
    Inventors: Jianwen Zhang, Fei Chen, Gongquan Liu, Xiang Zhang
  • Publication number: 20120125240
    Abstract: A method is provided for managing an amount of energy utilized by a carbon dioxide capture system. The method includes providing a fuel and a feed stream to a combustion system. The feed stream includes oxygen and a portion of a flue gas stream generated upon combustion of the fuel. The method also includes subjecting the flue gas stream to a carbon dioxide capture system to remove carbon dioxide therefrom, measuring a concentration of oxygen present in the feed stream, and selectively adjusting an amount of the flue gas stream included in the feed stream based on the measured concentration of oxygen in the feed stream. The selective adjustment is performed such that the feed stream maintains an oxygen concentration in a range of between about 10% to 90% by volume and the carbon dioxide capture system operates at an energy load between 1.4 GJ/ton of carbon dioxide and 3.0 GJ/ton of carbon dioxide.
    Type: Application
    Filed: November 22, 2010
    Publication date: May 24, 2012
    Inventors: Nareshkumar B. Handagama, Glen D. Jukkola, Frank M. Kluger, Rasesh R. Kotdawala, Carl H. Neuschaefer, Allen M. Pfeffer, Vikram Shabde
  • Publication number: 20120012036
    Abstract: A once-through steam generator (OTSG) creating steam from feedwater by heat provided by flue gas. Combustion air is introduced into the OTSG through an air input/output apparatus. It is then fed into a combustion system to generate the flue gas. The flue gas is then fed into a steam generation apparatus to generate steam. The flue gas is returned to the air input/output apparatus to mix with and preheat the combustion air. Steam is created by the passing of the flue gas across a series of tube contained within the OTSG. The tubes are arranged in a combination counter-current/co-current configuration to provides for the minimization of the creation of solid deposits in the tubes.
    Type: Application
    Filed: July 15, 2010
    Publication date: January 19, 2012
    Inventor: John R. Shaw
  • Patent number: 6609907
    Abstract: A combustion apparatus and process for improved flue gas recirculation wherein the recirculation line penetrates into an exhaust duct, such as the exhaust stack for capturing and directing a portion of said flue gas through the recirculation line which is connected to an air fan inlet which provides induction of the flue gas into the combustion unit. The portion of the recirculation line that extends into the exhaust stack is preferably aerodynamically configured to capture a portion of a flue gas stream without detrimental impedance of the gas flow.
    Type: Grant
    Filed: January 8, 2002
    Date of Patent: August 26, 2003
    Assignee: Entropy Technology and Environmental Consultants, LP
    Inventors: Stephen C. Wood, Ravindra K. Agrawal
  • Patent number: 6261090
    Abstract: A combustor system provides high temperature, high-dwell combustion of emission products, as from charcoal kilns, with inner and outer combustion chambers. Multiple inlets receive emission products from multiple heat exchangers omnidirectionally extending for continuous heat exchange connection between the combustor and emission sources. Hot products of combustion are delivered to each heat exchanger, each with multiple ducts in mutual heat exchange relationship including at least a hot products of combustion duct for receiving at the proximal end hot products of combustion from an outlet of the outer chamber, and conveying the hot products of combustion to the distal end at a respective emission source, an emissions inlet duct for receiving emission products at the distal end from the emission source, and a return products of combustion duct for receiving at the distal end the hot products of combustion and returning them to the combustor.
    Type: Grant
    Filed: April 28, 2000
    Date of Patent: July 17, 2001
    Assignee: Independent Stave Company
    Inventors: John J. Boswell, Dale R. Eichmeyer
  • Patent number: 6186080
    Abstract: A boiler recovers a soda component from pulp spent liquor and is able to prevent carry-over of unburnt char and deformation of a char bed configuration and to attain a stable combustion with low NOx generation. By regulating the combustion air supply, and feeding inert gas along a furnace side wall around the char bed, there are formed a combustion zone of reduction atmospheric field where air ratio in the surroundings of the char bed is 0.8 or less, a combustion zone of reduction atmospheric field where air ratio is 1.0 or less and unburnt components exist (including the case of a reduction atmospheric field where air ratio is 1.0 or less and unburnt components exist with the two combustion zones being combined together) and a combustion zone where combustion is completed.
    Type: Grant
    Filed: November 6, 1997
    Date of Patent: February 13, 2001
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Hirokazu Hino, Toshimitsu Ichinose, Kimishiro Tokuda, Yoshihisa Arakawa, Masaaki Nagai, Yoshitaka Baba
  • Patent number: 6116170
    Abstract: A waste incinerator is provided which can completely prevent environmental pollution by dioxins. Exhaust gas from an incinerator is guided into a glass melting furnace by a duct, and blown into molten glass through a bubbling pipe to decompose dioxins in the exhaust gas. High-temperature gas produced in the glass melting furnace is supplied into the incinerator by a pipe so as to burn wastes without using auxiliary fuel. Further, exhaust gas is pressurized by pressure pumps in a pipe branching from the duct, while fuel tablets to including ashes are introduced through a fuel inlet and fed into the molten glass under the pressure of exhaust gas to decompose dioxins in the ashes.
    Type: Grant
    Filed: April 14, 1999
    Date of Patent: September 12, 2000
    Assignee: Innovative Environmental Technology Co., Ltd.
    Inventors: Yasuhiro Yamada, Masuo Takeda
  • Patent number: 5957064
    Abstract: A multiple hearth furnace having a drying zone, a combustion zone and a cooling zone includes a recirculation loop that recycles exhaust gas from the drying zone to the cooling zone. In some embodiments, a first control loop including a temperature measurement device that measures temperature in the combustion zone controls fan speed of a recirculation fan that drives the recirculation loop. A second control loop monitors recirculation fan temperature and overrides the first control loop if the recirculation fan temperature exceeds a predetermined maximum. A third control loop controls air flow into the furnace.
    Type: Grant
    Filed: November 28, 1997
    Date of Patent: September 28, 1999
    Inventors: Louis T. Barry, Mark B. McCormick
  • Patent number: 5678498
    Abstract: A ventless, combustible waste reduction process and apparatus which can utilize any type of combustion means for disposing of hazardous, as well as non-hazardous, burnable waste. Such wastes include toxic combustible liquids, oil slurries, soils contaminated with dioxin, PCBs, creosote, or any other potentially harmful or toxic combustible material. In particular, the present invention relates to a ventless, combustible waste reduction process in which the operating pressure is slightly below atmospheric pressure and which employs no venting or stack discharge of pollutants whatsoever. The entire flue gas stream is scrubbed, enriched with oxygen and recycled to the combustion chamber in varying amounts in response to pressure and temperature measurements taken in the combustion chamber to maintain the pressure and temperature in the combustion chamber within pre-selected ranges.
    Type: Grant
    Filed: October 11, 1995
    Date of Patent: October 21, 1997
    Assignee: Envirotech, Inc.
    Inventor: Charles Wayne Whaley
  • Patent number: 5347958
    Abstract: An apparatus for recovering heat, and a flue gas recovery and/or recirculation and/or induced draft apparatus for boilers. The apparatus for recovering heat may be used in combination with the flue gas recovery and/or recirculation and/or induced draft apparatus for boilers. The flue gas recovery and/or recirculation and/or induced draft apparatus receives combustion gases from the apparatus for recovering heat and recirculates a portion of the combustion gases to a burner of a boiler and transmits the remaining portion of the combustion gases through a flue that communicates with the atmosphere.
    Type: Grant
    Filed: December 31, 1992
    Date of Patent: September 20, 1994
    Inventor: Merrill K. Gordon, Jr.
  • Patent number: 5241916
    Abstract: The procedure for supplying combustion air during grate firings, in which the primary combustion air is introduced into the fuel, and secondary combustion air is introduced directly into the flow of exhaust gas, and in which, in addition, some of the exhaust gas is tapped off from the flow of exhaust gas and returned to the combustion process, includes the withdrawal of exhaust gas directly above the fuel in the area where there is a large quantity of unused primary air, and the delivery of this exhaust gas that has been tapped off to the combustion air, the quantity of which is reduced according to the quantity of exhaust gas that is mixed with it.
    Type: Grant
    Filed: February 3, 1992
    Date of Patent: September 7, 1993
    Assignee: Martin GmbH fur Umwelt- und Energietechnik
    Inventor: Johannes J. E. Martin
  • Patent number: 4903615
    Abstract: An improved burner head for a forced air furnace is disclosed which includes a burner tube fitted with gas nozzles, air flow openings, and a flame tube. At least one radial opening is provided between the end of the burner tube and an end of the flame to allow exhaust gas recirculation via a ribbed ring secured between the burner tube and the flame tube upstream of the radial opening but downstream of the gas nozzles and airflow openings. The ribbed ring includes ribs protruding radially inward crosswise to the longitudinal axis of the burner head. The burner head allows for a substantial reduction in NOx, to a level on the order of less than 50 ppm.
    Type: Grant
    Filed: April 16, 1987
    Date of Patent: February 27, 1990
    Inventor: Walter Dreizler
  • Patent number: 4766851
    Abstract: A combustion chamber with a fluidized bed furnace having a nozzle plate, a fuel feed above the nozzle plate, a primary air feed below the nozzle plate, an exhaust gas channel at an upper end of the combustion chamber, and heat-exchanging heating surfaces includes a cylindrical combustion chamber wall disposed vertically upright and having, in an upper region thereof, a plurality of secondary air nozzles disposed tangentially as well as downwardly inclined to the cylindrical wall for separating and returning unspent solid particles into a lower region of the fluidized bed, a device for directing a flow of gas and particles vertically upwardly in a central region of the combustion chamber and spirally downwardly along the cylindrical wall, and a device for impressing an upwardly increasing rotary flow about an axis of symmetry of the combustion chamber upon the gas flow.
    Type: Grant
    Filed: May 21, 1986
    Date of Patent: August 30, 1988
    Assignee: Kraftwerk Union Aktiengesellschaft
    Inventors: Werner Emsperger, Hermann Bruckner, Georg Losel, Rudolf Pieper
  • Patent number: 4699071
    Abstract: A method and apparatus for reducing the NO.sub.x content of hot stack (exhaust) gas produced by a furnace burning a fossil fuel, comprising recycling part of said NO.sub.x -containing stack gas, in admixture with cold fresh air, back into the combustion chamber of the furnace.
    Type: Grant
    Filed: January 16, 1986
    Date of Patent: October 13, 1987
    Assignee: Henkel Kommanditgesellschaft auf Aktien
    Inventors: Fritz Vier, Michael Schulenburg, Dietrich Wiese
  • Patent number: 4656972
    Abstract: Temperature of exhaust gases from a fluidized-bed boiler is lowered by means of heat exchange and dust entrained in the exhaust gases is efficiently collected by a dust collector. Part of the gases discharged from the dust collector are mixed with heated combustion air and are charged into a fluidized bed. Therefore, problems caused by dust entrained in the exhaust gases to be mixed with the combustion air as well as the cold corrosion problem can be substantially solved so that the technique for reducing the NO.sub.x contents in the exhaust gases from the fluidized-bed boiler is satisfactorily established.
    Type: Grant
    Filed: September 6, 1985
    Date of Patent: April 14, 1987
    Assignee: Ishikawajima-Harima Jukogyo Kabushiki Kaisha
    Inventor: Hiromi Shimoda
  • Patent number: 4512266
    Abstract: A city refuse incinerator provided with stoker type firing equipment for combustion of city refuse has gas injectors installed low on the inside of a furnace body to inject low temperature inert combustion exhaust gas, purified in a dust collector, so that a gas curtain is formed on the inner surface of side walls of the furnace by the low temperature inert gas, thus preventing the formation of clinkers.
    Type: Grant
    Filed: March 27, 1984
    Date of Patent: April 23, 1985
    Assignee: Kabushiki Kaisha Takuma
    Inventor: Masanobu Shigaki
  • Patent number: 4470358
    Abstract: In a combustion chamber (20) the biomass to be degasified is placed via a conveyor screw (11) on to a trough (24). In the degasification chamber (20) there prevails a high temperature due to the vicinity of the flame chamber (27), so that the biomass is being degasified. The escaping gasses are burned in the flame chamber (27). Between the wall of the degasification chamber (20) and an outer casing (28) there is an air chamber (29) in which the fresh air introduced from the outside is preheated and thereafter is guided partly through the trough (24) and partly to another section of the flame chamber (27).
    Type: Grant
    Filed: January 6, 1983
    Date of Patent: September 11, 1984
    Inventor: Karl-Wilhelm Prochnow
  • Patent number: 4335660
    Abstract: A solid fuel boiler or furnace with a flue gas-air mixture introduced into the fuel grate is disclosed. The flue gas is mixed with air such that approximately 30% of the mixture is flue gas. By providing this mixture under the burning fuel bed, the temperature of the fuel bed is lowered and excess oxygen is reduced. A more reactive fuel bed results providing various advantages including improved boiler operation and a clinker-free fuel bed.
    Type: Grant
    Filed: June 2, 1980
    Date of Patent: June 22, 1982
    Assignee: Research Cottrell Technologies, Inc.
    Inventors: Kenneth L. Maloney, Nick B. de Volo
  • Patent number: 4292904
    Abstract: A furnace system, especially a coal burning furnace and boiler system, in which the coal to be burned is placed on a grate at the bottom of the combustion chamber. According to the invention, automatic means are provided for supplying the coal to the boiler in response to the demands of the boiler. In addition, the boiler system of the present invention includes new and improved means for heating water to about F. to produce steam for use in generating power, such as in a steam locomotive railroad engine pulling up to at least 150 cars. The present invention also, in addition, provides the steam generating raw and distilled water supplies in indirect heat exchange closely adjacent the boiler in order to take advantage of the boiler for maintaining heating of the water supplies. Furthermore, the boiler system of the present invention provides means for recycling the combustion gases back into the combustion chamber whereby to enhance the heat producing efficiency of the boiler system.
    Type: Grant
    Filed: March 13, 1980
    Date of Patent: October 6, 1981
    Inventor: Cecil R. Brandt
  • Patent number: 4242972
    Abstract: A combustion system for particulate wood waste, coal, peat and other combustible materials is disclosed. The system comprises means for feeding combustion material into the combustion chamber of a furnace and means for recirculating a portion of the exhaust gases from the furnace back into the combustion chamber for increasing the temperature of the combustion chamber and so improve the thermal efficiency of the furnace.
    Type: Grant
    Filed: December 22, 1978
    Date of Patent: January 6, 1981
    Inventor: Guy Sicard
  • Patent number: 4089278
    Abstract: A furnace, especially a coal burning furnace, in which the coal to be burned is placed on a grate near the bottom of a combustion chamber. According to the invention, a fan, or blower, has the inlet and the outlet connected to conduits which lead downwardly at opposite sides of the furnace and turn inwardly into the combustion chamber and blow the flue gases back into the combustion chamber at about 3 inches above the flame center and slightly forward thereof to provide an over and under draft. The conduits extending downwardly from the fan, or blower, at the sides of the boiler preferably have clean-outs at the lower ends thereof, with doors, and solid particles entrained in the flue gas which drop out therefrom can thereby be removed from the conduits. Further, each conduit is preferably provided with a blowdown nozzle at the top to which compressed air can be supplied to blow down the conduit and thereby dislodge solid material that may accumulate therein during operation of the boiler.
    Type: Grant
    Filed: June 22, 1977
    Date of Patent: May 16, 1978
    Inventor: Cecil R. Brandt