Of Noncombustible Fluid; E.g., Air, Etc. Patents (Class 110/188)
  • Patent number: 10165054
    Abstract: The present invention discloses control system and method of an IoT boiler. A control system of an IoT boiler according to the present invention includes: the IoT boiler that checks an operation state to transmit state information, and senses whether or not a fault occurs through a sensor to transmit fault information; a manager terminal that includes a boiler control application for monitoring and controlling the IoT boiler, monitors a state of the IoT boiler, receives control information for controlling the IoT boiler from a manager, and transmits the control information; and a central management server that is connected to the IoT boiler and the manager terminal through a network, periodically or non-periodically receives and stores the state information of the IoT boiler from the IoT boiler, and receives the control information for controlling the IoT boiler from the manager terminal to perform control of the IoT boiler.
    Type: Grant
    Filed: May 10, 2018
    Date of Patent: December 25, 2018
    Assignees: KITURAMI CO., LTD.
    Inventors: Sung-Hwan Choi, Young-Hwan Choi
  • Patent number: 9784448
    Abstract: A method for regulating the combustible mixture such as air/gas, air/methane gas or the like fed to a burner, the method including measuring a flame signal correlated with the composition of the mixture fed by feed members controlled by a combustion controller arranged to regulate the combustion on the basis of the flame signal. During burner operation the mixture feed conditions are modified within a narrow time interval to obtain a flame signal variation; a ratio between values of this the flame signal at the end and at the beginning of the interval is compared with a predetermined reference value; and, on the basis of the deviation of this ratio from the reference value, the flame set point is regulated, as consequently is the air or gas of the mixture if this is rendered necessary.
    Type: Grant
    Filed: March 12, 2013
    Date of Patent: October 10, 2017
    Assignee: BERTELLI & PARTNERS S.R.L.
    Inventor: Pierluigi Bertelli
  • Patent number: 9581326
    Abstract: A ground supported power boiler is described combining a refractory lined and insulated conical floor; an insulated cylindrical combustion chamber; a cylindrical furnace with water tube wall; a rectangular convective section; a single vertical steam drum; tangential injection of the fuel and combustion air; means for fluidizing the fuel bed; means for selectively stripping particulates from the flue gases; multi-stage particulate stripping and filtering from flue gases, means for using the walls of steam drum as steam/water droplet separator, means for recirculating and capturing heat from the flue gases; means for pressurizing the interior of the boiler above atmospheric pressure; means for heating and drying fuel prior to feeding the fuel to the boiler; means for creating hydrogen shift reaction; means for eliminating any need for sootblowing; and designed to not require the use of an induced draft fan.
    Type: Grant
    Filed: August 13, 2015
    Date of Patent: February 28, 2017
    Inventors: Daniel R. Higgins, Eugene Sullivan
  • Patent number: 9550635
    Abstract: Method and apparatus for air flow regulation comprise a vertically oriented tube, a sail assembly positioned in the tube and moveable therewithin responsively to air flow through the tube to regulate rate of air flow through the tube and to stop air flow through the tube upon air flow rate through the tube exceeding a preselected value with a detector for sensing when the sail assembly has stopped air flow through the tube as a result of air flow rate exceeding said pre-selected value.
    Type: Grant
    Filed: January 9, 2015
    Date of Patent: January 24, 2017
    Inventor: Stephen B. Maguire
  • Patent number: 9518734
    Abstract: A grid for distributing and mixing fluids in a duct includes a plurality of lances arranged in a first plane and configured to be positioned transverse to a direction of a first fluid flowing outside of the lances and within a predetermined flow area. Each of the plurality of lances has at least one first inlet and a plurality of outlet nozzles. One or more of the outlet nozzles is directed generally in the flow direction of the first fluid outside of the lances, and is configured to discharge a second fluid therefrom.
    Type: Grant
    Filed: January 28, 2013
    Date of Patent: December 13, 2016
    Assignee: GENERAL ELECTRIC TECHNOLOGY GMBH
    Inventors: Mitchell B. Cohen, Yen-Ming Chen, Armand A. Levasseur
  • Publication number: 20150079526
    Abstract: An oxy-combustion boiler unit is disclosed which includes a furnace for combusting fuel and for emitting flue gas resulting from combustion. The furnace has first, second and third combustion zones, and an air separation unit for separating oxygen gas from air and providing a first portion of the separated oxygen to a first oxidant flow, a second portion to a second oxidant flow, and a third portion of the separated oxygen gas to the first, second, and third zones of the furnace. A controller can cause the separated oxygen gas to be distributed so that the first and second oxygen flows have a desired oxygen content, and so that the first, second, and third zones of the furnace receive a desired amount of oxygen based on a combustion zone stoichiometry control.
    Type: Application
    Filed: September 18, 2013
    Publication date: March 19, 2015
    Applicant: ALSTOM Technology Ltd
    Inventors: Xinsheng LOU, Jundong Zhang, Abhinaya Joshi, James A. Mccombe, Armand A. Levasseur
  • Publication number: 20150064632
    Abstract: A fluid fuel burning device, comprising: an elongated combustion compartment comprising side walls, where distal end is open allowing fluid communication from inside the combustion compartment and out of compartment; an insulation layer arranged on the inner surface of the side walls and/or on an inner surface of the proximal end of the compartment, preventing heat inside the compartment from radiating away from the compartment from the side walls and/or the proximal end, air flow means for providing a current of air, a fuel nozzle for aerification of the fluid fuel inside the combustion compartment, fuel feeding means for feeding fluid fuel to the fuel nozzle, pressure providing means for applying pressure to the fluid fuel fed via the fuel feeding means, and where the insulation layer comprises a heat absorbent layer that is of a temperature retentive material and radiating heat from the absorbent layer into the combustion compartment.
    Type: Application
    Filed: March 27, 2013
    Publication date: March 5, 2015
    Applicant: PURETEQ A/S
    Inventor: Dennis Søgaard
  • Patent number: 8967996
    Abstract: The combustion controller controls the fuel and air that are supplied to the combustion furnace for burning substances, and addresses the aforementioned object by including: fuel supply unit for supplying fuel and air into the combustion furnace; air supply unit for supplying air into the combustion furnace, the air supply unit being disposed downstream of the fuel supply unit in the direction of flow of combustion air; concentration measuring unit for measuring the concentration of hydrogen sulfide of the combustion air by passing a measurement beam of light through the combustion air at a measurement position downstream of the fuel supply unit in the direction of flow of the combustion air; and control unit for controlling the amount of air supplied from the fuel supply unit based on a measurement result provided by the concentration measuring unit.
    Type: Grant
    Filed: February 19, 2010
    Date of Patent: March 3, 2015
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Masazumi Tanoura, Kenji Muta, Shinichiro Asami, Eiji Kato, Tadashi Aoki, Koutaro Fujimura, Tetsuya Sawatsubashi, Chisato Tsukahara, Shinsaku Dobashi
  • Publication number: 20150017594
    Abstract: A burner apparatus (10) for a process heating system (400) includes a combustion air damper (48) to control the volume of air in the combustion chamber (98). Top (15), bottom (17), and sidewalls (14) of the chamber are of steel without refractory material lining while a fuel door (178) is steel with refractory material lining (186). A flue gas damper (34) selectively allows or disallows flue gas out of the chamber. A cooling jacket (18) of a steel sheeting surrounds and is narrowly spaced from the combustion chamber top, bottom, and sidewalls. The cooling jacket conducts air, transfers heat from the combustion chamber top, bottom, and sidewalls to thereby prevent overheating, and generates heated air. A turbulation device (38) combines flue gas and heated air into a turbulent air-gas mixture, completes combustion, and outputs a heated gas stream.
    Type: Application
    Filed: July 9, 2013
    Publication date: January 15, 2015
    Inventor: David Wilson
  • Publication number: 20140318427
    Abstract: The present invention relates to methods and systems for controlling a combustion reaction and the products thereof. One embodiment includes a combustion control system having an oxygenation stream substantially comprising oxygen and CO2 and having an oxygen to CO2 ratio, then mixing the oxygenation stream with a combustion fuel stream and combusting in a combustor to generate a combustion products stream having a temperature and a composition detected by a temperature sensor and an oxygen analyzer, respectively, the data from which are used to control the flow and composition of the oxygenation and combustion fuel streams. The system may also include a gas turbine with an expander and having a load and a load controller in a feedback arrangement.
    Type: Application
    Filed: July 8, 2014
    Publication date: October 30, 2014
    Inventors: Franklin F. Mittricker, Loren K. Starcher, Chad C. Rasmussen, Richard A. Huntington, Frank Hershkowitz
  • Publication number: 20140315137
    Abstract: A method for burning a fuel in a wood stove having a door to a combustion chamber with a base, which combustion chamber is isolated from the air by an exhaust and an intake at which intake there is provided an air regulator having at least primary, secondary and tertiary air intake ducts. The stove is controlled by a burn controller configured to operate between the different operating, i.e. different combustion states.
    Type: Application
    Filed: November 7, 2012
    Publication date: October 23, 2014
    Inventor: Vagn Hvam Pedersen
  • Publication number: 20140295358
    Abstract: A method and apparatus for burning hydrocarbons or other combustible liquids and gases, the apparatus (APP) has been provided with at least one inlet for a liquid and/or gaseous fuel (FUE) and air (AIR) and at least one outlet (EXHG) for gases for removing the gases (EXHG) generated in the apparatus (APP), at least one measurement and adjustment unit (C) for adjusting the amount of fuel (FUE) and air (AIR), at least one pre-combustion zone (Cz11, Cz12, Tz1) for the partial combustion of gases, and at least one post-combustion zone (Tz2, Cz21, Cz22) for the combustion of gases generated in pre-combustion, for the reduction of NOx's produced in pre-combustion, and/or for the oxidation of hydrocarbon and carbon monoxide emissions.
    Type: Application
    Filed: March 27, 2014
    Publication date: October 2, 2014
    Applicant: OILON OY
    Inventors: Reijo LYLYKANGAS, Eero PEKKOLA, Tero TULOKAS
  • Publication number: 20140261111
    Abstract: A combustion efficiency control system includes an air flow sensor arrangement, a fuel controller unit, a burner output sensor module, and an operating unit. The air flow sensor arrangement including an upstream laminar flow control system and a downstream laminar flow control system and is communicatively coupled to a damper, a blower, and a flow conditioner. The air flow sensor arrangement measures laminar air flow and emits an efficiency signal that includes laminar air flow input values. An operating unit compares laminar air flow input values with combustion output values and a stoichiometric controller receives the comparison to generate an efficiency signal having a combination of air and fuel control data for the damper, the blower, the flow conditioner and the fuel controller unit, respectively. The stoichiometric controller maintains a selected combustion efficiency setting until cancelled.
    Type: Application
    Filed: March 13, 2014
    Publication date: September 18, 2014
    Applicant: Resource Rex, LLC
    Inventors: Teodoro A. Cantú, Ulric Teodoro Alejandro Cantú, Ervin Eulid Torres
  • Publication number: 20140248202
    Abstract: This invention relates to a process for incinerating NH3 in an NH3 incinerator comprising a first incineration step at controlled sub-stoichiometric incineration conditions and a second incineration step with at a greater than stoichiometric amount of oxygen, whereby a product stream is produced with reduced NO formation. The invention also relates to an NH3 incinerator.
    Type: Application
    Filed: September 7, 2012
    Publication date: September 4, 2014
    Applicant: DUIKER COMBUSTION ENGINEERS B.V.
    Inventors: Maarten Betlem, Sjaak Olsthoorn, Mark Van Welsen
  • Patent number: 8814561
    Abstract: Stable operation of oxyfuel combustion boiler is ensured and amplification in likelihood of or downsizing of forced draft fan is attained. Upon change of commanded boiler load from start value to target value by target time, a feed amount of oxygen from oxygen producing device is regulated for attainment of oxygen concentration on entry side of the boiler body from reference value to attainment point or target entry-side oxygen concentration within entry-side oxygen concentration regulation range by target time. After attainment to attainment point, control is made to return entry-side oxygen concentration to reference value at return point. Airflow rate of forced draft fan is controlled with change rate smaller than change rate with which air flow rate of forced draft fan reaches target value by target time.
    Type: Grant
    Filed: July 16, 2013
    Date of Patent: August 26, 2014
    Assignee: IHI Corporation
    Inventors: Tetsuya Hori, Toshihiko Yamada, Yohei Akutsu
  • Publication number: 20140223909
    Abstract: A comburant gas supply system is provided for a combustion boiler/turbine of a thermal power plant, a combustion boiler/turbine system and a thermal power plant. The gas supply system has an air separation module to separate and output an oxygen rich gas from an input air supply; a comburant gas storage module fluidly connected to the output of the air separation module for storage in liquid state of separated oxygen rich gas; a comburant gas supply module to supply the oxygen rich gas to the combustion boiler selectively from the air separation system and/or the comburant gas storage system. The air separation module has an oxygen rich gas output capacity determined from a demand rating for the combustion boiler/turbine adjusted with reference to a load factor across a predetermined operating period and/or the ASU size is increased to provide longer term energy storage capacity.
    Type: Application
    Filed: September 18, 2012
    Publication date: August 14, 2014
    Applicant: DOOSAN BABCOCK LIMITED
    Inventors: Konrad Jerzy Kuczynski, Douglas John Spalding
  • Publication number: 20140102341
    Abstract: A high efficiency laminar flow burner system for proving a stream of heat energy including a supply input module for providing fuel and laminar streams of air to a combustion manifold. The laminar air delivery system includes a damper, a blower, and an air delivery controller. The air delivery controller receives an efficiency signal to control the flow of a laminar air intake stream by adjusting the damper. The combustion manifold includes an air-fuel mixing system, a stoichiometric unit, and a refractory unit each coupled to one another. The laminar air intake stream traveling from the supply input module passes through a stoichiometric unit body to meet with a first combustion stream from an air-fuel mixing chamber within the stoichiometric unit body to define a second combustion stream. The second combustion stream then travels across the refractory passageway to define a third combustion stream.
    Type: Application
    Filed: December 25, 2013
    Publication date: April 17, 2014
    Applicant: Resource Rex, LLC
    Inventors: Teodoro A. Cantú, Ulric Teodoro Alejandro Cantú, Ervin Eluid Torres
  • Publication number: 20140076209
    Abstract: The dry oxygen content in the exhaust of an industrial furnace may be controlled to 1% or less by determining one or more of: the temperature of: each or a group of one or more burner (flame); one or more section of the radiant walls adjacent (e.g., within 5 feet of the burner); the temperature gradient across the process coils; the combustion products of one or more burners; the mass flow rate or the volume flow rate of air to each burner (e.g., the pressure drop across the variable forced air aperture ii) comparing the result to said target value; and iii) adjusting either a) the opening of the variable forced air aperture; or b) adjusting the mass flow rate or the volume flow rate of air from said one or more fans.
    Type: Application
    Filed: August 28, 2013
    Publication date: March 20, 2014
    Applicant: NOVA CHEMICALS (INTERNATIONAL) S.A.
    Inventors: Leslie Wilfred Benum, Eric Clavelle, Grazyna Petela, Randall E. Saunders, Mark Williamson
  • Patent number: 8662884
    Abstract: An apparatus of controlling oxygen supply for a boiler having wind boxes 2a and 2b arranged on left and right of a boiler body 1 is configured to control supply balance of oxygen by adjusting oxygen supply opening degrees of the left and right oxygen distribution dampers 15a and 15b in accordance with a oxygen supply flow rate and left and right actually measured oxygen concentrations when controlling the oxygen supply amounts and to control the exhaust gas flow rates by correcting an exhaust gas flow rate set value corresponding to a boiler load demand in accordance with an oxygen concentration set value corresponding to a boiler load demand, left and right actually measured exhaust gas flow rates and left and right actually measured oxygen concentrations and adjusting left and right exhaust gas introduction opening degrees of the left and right exhaust gas introduction dampers 8a and 8b when controlling the exhaust gas flow rates.
    Type: Grant
    Filed: March 6, 2008
    Date of Patent: March 4, 2014
    Assignees: IHI Corporation, Electric Power Development Co., Ltd.
    Inventors: Toshihiko Yamada, Terutoshi Uchida, Masami Sato
  • Publication number: 20140057215
    Abstract: A combustion furnace and a method of its operation are described. The furnace comprises a chamber defining a combustion volume having at least one primary inlet for fuel and combustion supporting gases and at least one primary outlet for combustion product gases, which chamber is provided with one or more additional ports, for example in fluid communication with a supply of gas for secondary gas flow, allowing for secondary gas flow into and/or out of the combustion volume.
    Type: Application
    Filed: December 16, 2011
    Publication date: February 27, 2014
    Applicants: POWER SYSTEMS SYNETICS LIMITED, DOOSAN BABCOCK LIMITED
    Inventors: Konrad Jerzy Kuczynski, David James Adams
  • Patent number: 8656846
    Abstract: A method and an apparatus for continuous real time heating value/coal flow balancing of coal from a coal feeder to a burner. The apparatus includes a Dual-energy Gamma Attenuation (DGA)/Multi-energy Gamma Attenuation (MGA) device for measuring coal quality at a specific location between the coal silo/bunker and the coal feeder in a coal fired plant in order to control the individual burner stoichiometries according to the measured coal quality. By strategically placing the DGA/MGA device, continuous accurate real-time coal quality information is accomplished for making individual adjustments in order to improve stoichiometry to optimize performance of the system.
    Type: Grant
    Filed: September 13, 2010
    Date of Patent: February 25, 2014
    Assignee: Energy Technologies, Inc.
    Inventors: Peter M. Osucha, David K. Swindell, Jack R. Lee
  • Patent number: 8636501
    Abstract: A method is proposed for regulating a firing device taking into account the temperature and/or the burner load, in particular with a gas burner, comprising the regulation of the temperature (Tactual) produced by the firing device using a characteristic which shows a value range corresponding to a desired temperature (Tdesired) dependent upon a first parameter (mL,VL) corresponding to the burner load (Q), wherein when representing the characteristic, a second parameter, preferably the air ration (?), defined as the ratio of the actually supplied quantity of air to the quantity of air theoretically required for optimal stoichiometric combustion, is constant.
    Type: Grant
    Filed: October 19, 2010
    Date of Patent: January 28, 2014
    Assignee: Landshut GmbH
    Inventors: Martin Geiger, Ulrich Geiger, Rudolf Tungl
  • Publication number: 20140011141
    Abstract: Provided is a combustion burner including: a fuel nozzle (51) that is able to blow a fuel gas obtained by mixing pulverized coal with primary air; a secondary air nozzle (52) that is able to blow secondary air from the outside of the fuel nozzle (51); a flame stabilizer (54) that is provided at a front end portion of the fuel nozzle (51) so as to be near the axis center; and a rectification member (55) that is provided between the inner wall surface of the fuel nozzle (51) and the flame stabilizer (54), wherein an appropriate flow of a fuel gas obtained by mixing solid fuel with air may be realized.
    Type: Application
    Filed: March 7, 2012
    Publication date: January 9, 2014
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Keigo Matsumoto, Kazuhiro Domoto, Naofumi Abe, Jun Kasai
  • Patent number: 8607716
    Abstract: In a burner for highly caking coal in which a solid fuel channel and a gasifying agent channel are provided in a double pipe structure, the temperature increase of the particles of a highly caking solid fuel and the resulting fusion and expansion of the particles are prevented or suppressed, thereby enabling a stable operation of the gasifier. In a burner for highly caking coal in which a solid fuel channel that is attached for gasifying a highly caking solid fuel that has been pulverized into particles and that supplies the solid fuel into the gasifier, and a gasifying agent channel that supplies a gasifying agent into the gasifier are provided in a double pipe structure, the burner has a triple pipe structure including a cooling water channel that circulates cooling water between the solid fuel channel and the gasifying agent channel, and the cooling water is recovered after use.
    Type: Grant
    Filed: June 18, 2008
    Date of Patent: December 17, 2013
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Yoshinori Koyama, Takeshi Aruga, Hiromi Ishii, Kazuyuki Myoyo
  • Patent number: 8607717
    Abstract: The present invention relates to a regulated two stage thermal oxidation of waste and applications to use such a process for energy generation. A system and a method are provided comprising a set up of one or more gasification chambers, which are connected via ductwork to a combustion chamber to burn the waste material. The waste is loaded into the gasification chamber(s) and ignited there and the gas, which is generated by the sub-stoichiometric combustion in the gasification chamber is fully combusted in the secondary combustion chamber at a very high temperature. The time used for the burn down period is decreased and controlled by several air and gas flow factors of the system of the present invention.
    Type: Grant
    Filed: December 7, 2007
    Date of Patent: December 17, 2013
    Assignee: WTE Waste To Energy Canada, Inc.
    Inventor: Fridfinnur Einarsson
  • Patent number: 8601957
    Abstract: A device and method for controlling fuel-air ratio during combustion of ground in a coal power plant, including pneumatic delivery of ground coal to the burners and feeding combustion air to burners while controlling the combustion air and the amount of carrier air. A high reliability of control combined with low maintenance of the air mass measurement devices is achieved. This is achieved by a measurement device for measuring the amount of combustion air which, according to correlation measurement, evaluates the triboelectric effects on sensors. Between 0.1 mg and 10 mg of fine-grained particles of a diameter between 20 ?m and 200 ?m are introduced per m3 air into suctioned fresh air, which is carried out during the starting of the firing system. This is done by correlation measurement that evaluates triboelectric effects on sensors, arranged in series in carrier air stream in direction of flow of the carrier air.
    Type: Grant
    Filed: June 24, 2009
    Date of Patent: December 10, 2013
    Assignee: Promecon Prozess-und Messtechnik Conrads GmbH
    Inventors: Hans George Conrads, Alexander Halm
  • Publication number: 20130323657
    Abstract: A technique for controlling the combustion of fuel in a combustion boiler, comprising at least the following steps: a) a desired combustion air quantity for the combustion of the fuel in the combustion boiler is determined, b) a combustion air quantity which is available for the combustion of the fuel in the combustion boiler is determined, c) at least one combustion air inflow is controlled by at least one material output opening or at least one appliance opening in the combustion boiler, in order to at least partially match the combustion air quantity available in the combustion boiler to the desired combustion air quantity.
    Type: Application
    Filed: November 23, 2011
    Publication date: December 5, 2013
    Inventors: Ralph Ludwig, Christian Mueller
  • Patent number: 8584604
    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: Grant
    Filed: November 28, 2006
    Date of Patent: November 19, 2013
    Assignees: Electric Power Development Co., Ltd., IHI Corporation
    Inventors: Toshihiko Yamada, Toshiro Fujimori, Shinichi Takano
  • Publication number: 20130302738
    Abstract: Example methods and apparatus to control combustion process systems are disclosed. An example method includes monitoring an actual flow of fuel into a combustion process, calculating a relative heat release value corresponding to the fuel in the combustion process, and determining a fuel demand for the combustion process based on the relative heat release value.
    Type: Application
    Filed: May 13, 2013
    Publication date: November 14, 2013
    Inventors: John Duncan Rennie, Scott Rusheon Pettigrew, Barbara Kerr Hamilton, Andrea Nicole Bishop
  • Publication number: 20130302739
    Abstract: Stable operation of oxyfuel combustion boiler is ensured and amplification in likelihood of or downsizing of forced draft fan is attained. Upon change of commanded boiler load from start value to target value by target time, a feed amount of oxygen from oxygen producing device is regulated for attainment of oxygen concentration on entry side of the boiler body from reference value to attainment point or target entry-side oxygen concentration within entry-side oxygen concentration regulation range by target time. After attainment to attainment point, control is made to return entry-side oxygen concentration to reference value at return point. Airflow rate of forced draft fan is controlled with change rate smaller than change rate with which air flow rate of forced draft fan reaches target value by target time.
    Type: Application
    Filed: July 16, 2013
    Publication date: November 14, 2013
    Applicant: IHI Corporation
    Inventors: Tetsuya HORI, Toshihiko Yamada, Yohei Akutsu
  • Patent number: 8561554
    Abstract: To provide a burner structure in which a burner is capable of highly precisely controlling the flow rate of the air for combustion within itself. An air flow passage (11) in a wind box (12) for injecting the air for combustion into a furnace (1) has a bent portion (13) just before joining with the furnace, and one or a plurality of guide vanes (14) are provided in the air flow passage (11) in the bent portion (13), and also in the bent portion (13), a drift control damper (16) is provided for varying the ratio of flow passage resistances of each of the air flow passages (11) divided by the guide vanes (14).
    Type: Grant
    Filed: July 24, 2008
    Date of Patent: October 22, 2013
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Ryuhei Takashima, Takuichiro Daimaru, Shinya Hamasaki
  • Patent number: 8550017
    Abstract: Provided are a method and an apparatus of controlling exhaust gas in an oxyfuel combustion boiler which can attain stable combustion of the boiler while an amount of unburned combustibles and a NOx density in exhaust gas are maintained in their allowable ranges. A rate of supply of directly supplied oxygen to burners 6 to a total amount of oxygen produced by an air separation unit 18 is regulated in an operating range where the NOx density in the exhaust gas is below a NOx limit value and the amount of unburned combustibles in the exhaust gas is blow an unburned combustible limit value to thereby attain stable combustion of the oxyfuel combustion boiler.
    Type: Grant
    Filed: March 6, 2008
    Date of Patent: October 8, 2013
    Assignees: IHI Corporation, Electric Power Development Co., Ltd.
    Inventors: Shuuhei Terushita, Toshihiko Yamada, Shuzo Watanabe, Terutoshi Uchida
  • Patent number: 8550016
    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: Grant
    Filed: March 6, 2008
    Date of Patent: October 8, 2013
    Assignees: IHI Corporation, Electric Power Development Co., Ltd.
    Inventors: Shuuhei Terushita, Toshihiko Yamada, Shuzo Watanabe, Terutoshi Uchida
  • Publication number: 20130255547
    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: May 31, 2013
    Publication date: October 3, 2013
    Applicant: BABCOCK-HITACHI K.K
    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
  • Patent number: 8505472
    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: Grant
    Filed: January 10, 2007
    Date of Patent: August 13, 2013
    Assignee: Babcock-Hitachi K.K.
    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
  • Patent number: 8501128
    Abstract: Sorbent components containing halogen, calcium, alumina, and silica are used in combination during coal combustion to produce environmental benefits. Sorbents such as calcium bromide are added to the coal ahead of combustion and other components 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 22, 2012
    Date of Patent: August 6, 2013
    Inventor: Douglas C. Comrie
  • Patent number: 8500441
    Abstract: A method is proposed for regulating a firing device taking into account the temperature and/or the burner load, in particular with a gas burner, comprising the regulation of the temperature (Tactual) produced by the firing device using a characteristic which shows a value range corresponding to a desired temperature (Tdesired) dependent upon a first parameter (mL, VL) corresponding to the burner load (Q), wherein when representing the characteristic, a second parameter, preferably the air ratio (?), defined as the ratio of the actually supplied quantity of air to the quantity of air theoretically required for optimal stoichiometric combustion, is constant.
    Type: Grant
    Filed: June 20, 2005
    Date of Patent: August 6, 2013
    Assignee: EBM-Papst Landshut GmbH
    Inventors: Martin Geiger, Ulrich Geiger, Rudolf Tungl
  • Patent number: 8453585
    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: Grant
    Filed: April 13, 2009
    Date of Patent: June 4, 2013
    Assignees: Babcock & Wilcox Power Generation Group, Inc., American Air Liquide, Inc.
    Inventors: Bryan B. Stone, Denny K. McDonald, Allan J. Zadiraka, Rajani K. Varagani
  • Publication number: 20130133559
    Abstract: A fluid flow regulator of the present invention comprises in combination a stationary hollow duct housing having a first end and a second end through which fluid flows. The device also incorporates a movable member aligned concentric with the duct having an end essentially similarly shaped and sized to the first end of the housing. The member may be spaced apart from the duct so that fluid can enter the duct housing through an opening defined by the space between the end of the member and the first end of the duct, with the movement of the member serving to change the size of opening. The movement of the member is controlled by the movement of a float located within the duct.
    Type: Application
    Filed: May 30, 2012
    Publication date: May 30, 2013
    Applicant: FLSMIDTH A/S
    Inventor: John S. Salmento
  • Patent number: 8443739
    Abstract: Through the addition of tertiary air and a reduction of secondary air, NOx emissions from a waste-to-energy (WTE) boiler may be reduced. The tertiary air is added to the WTE at a distance from the secondary air, in a boiler region of relatively lower temperatures. A secondary NOx reduction system, such as a selective non-catalytic reduction (SNCR) system using ammonia or urea, may also be added to the boiler with tertiary air to achieve desirable high levels of NOx reductions. The SNCR additives are introduced to the WTE boiler proximate to the tertiary air.
    Type: Grant
    Filed: January 26, 2011
    Date of Patent: May 21, 2013
    Assignee: Covanta Energy Corporation
    Inventors: Stephen P. Goff, Mark L. White, Stephen G. Deduck, John D. Clark, Christopher A. Bradley, Robert L. Barker, Zenon Semanyshyn
  • Publication number: 20130115560
    Abstract: Fuel-fired furnace and a method for operating it, in which method: a main oxidizing agent is injected at a controlled flow rate into the combustion chamber of the furnace; the combustible material is burnt in the combustion chamber with the main oxidizing agent, producing thermal energy and flue gases at a temperature higher than 600° C.; the flue gases are removed via an exhaust duct, said removed flue gases possibly containing residual materials that could be oxidized, the exhaust duct being equipped with an inlet for a diluting oxidizing agent downstream of the combustion chamber; the residual materials that could be oxidized are burnt with the diluting oxidizing agent by means of a flame at the inlet for the diluting oxidizing agent; the flame intensity inside the exhaust duct is detected; and the flow rate at which the main oxidizing agent is injected into the combustion chamber is controlled according to the detected flame intensity.
    Type: Application
    Filed: March 30, 2011
    Publication date: May 9, 2013
    Applicant: L'Air Liquide Societe Anonyme Pour L'Etude ET L'Exploitation Des Proceded Georges Claude
    Inventors: Philippe Beaudoin, Benoit Loiselet
  • Publication number: 20120325129
    Abstract: An apparatus for constant feeding of pulverized fuels at ambient or elevated pressure having a fixed restrictor device in the pulverized fuel conveyor line connecting a metering vessel to a pulverized fuel consumer is provided. The restrictor device effects a compensation and also attenuation of pressure fluctuations such as occur in the pulverized fuel conveyor line, in particular during operations to replenish the metering vessel. Special embodiments relate to a further equalization by means of injections of auxiliary gas into the pulverized fuel conveyor line.
    Type: Application
    Filed: June 19, 2012
    Publication date: December 27, 2012
    Inventors: Frank Frisch, Frank Hannemann, Thomas Metz, Manfred Schingnitz
  • Publication number: 20120325128
    Abstract: An apparatus for constantly supplying pulverized fuel at ambient or increased pressure includes a restrictable pulverized fuel control valve in the pulverized fuel feed line connecting the swirl layer of a dispensing vessel with a pulverized fuel collector is provided. This pulverized fuel control valve effects a compensation for and also attenuation of the pressure fluctuations, as occur in the pulverized fuel feed line, particularly during refill processes of the dispensing vessel. Special embodiments relate to a further homogenization by a fixed throttle facility and also auxiliary gas feeds into the pulverized fuel feed line.
    Type: Application
    Filed: June 19, 2012
    Publication date: December 27, 2012
    Inventors: Frank Frisch, Frank Hannemann, Thomas Metz, Manfred Schingnitz
  • Publication number: 20120227643
    Abstract: A recycling furnace is provided for processing potentially explosive precious metal-containing materials having organic fractions that combust with great energy. The furnace includes a switching facility for alternating operation of two burning-off chambers of the furnace between: (A) pyrolysis or carbonization under protective furnace gas in an atmosphere comprising maximally 6 wt-% oxygen, and (B) oxidative combustion of the organic fractions including carbon. The furnace has indirect heating and a control that determines the end of the pyrolysis or carbonization by a sensor and controls the switching facility to supply air or oxygen to the interior of the furnace. A continuous conveyor for dosing of liquids or liquefied substances during the pyrolysis is controlled by at least one parameter of post-combustion, preferably a temperature sensor. A single waste gas treatment facility is used for thermal post-combustion for the two furnace chambers.
    Type: Application
    Filed: May 1, 2012
    Publication date: September 13, 2012
    Applicant: HERAEUS PRECIOUS METALS GMBH & CO. KG
    Inventors: Christian NOWOTTNY, Horst MEYER, Matthias GREHL, Dieter SCHÄFER, Hans-Joachim ALT, Wilhelm GLAB
  • Patent number: 8226913
    Abstract: Sorbent components containing halogen, calcium, alumina, and silica are used in combination during coal combustion to produce environmental benefits. Sorbents such as calcium bromide are added to the coal ahead of combustion and other components 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: May 2, 2011
    Date of Patent: July 24, 2012
    Assignee: NOx II, Ltd.
    Inventor: Douglas C. Comrie
  • Publication number: 20120107753
    Abstract: Burner control systems and methods of operating a burner are for a large boiler such as might be used in hospitals, hotels, offices or other large commercial or domestic premises.
    Type: Application
    Filed: November 15, 2010
    Publication date: May 3, 2012
    Applicant: Autoflame Engineering Limited
    Inventor: Brendan KEMP
  • Publication number: 20120079969
    Abstract: The combustion controller controls the fuel and air that are supplied to the combustion furnace for burning substances, and addresses the aforementioned object by including: fuel supply unit for supplying fuel and air into the combustion furnace; air supply unit for supplying air into the combustion furnace, the air supply unit being disposed downstream of the fuel supply unit in the direction of flow of combustion air; concentration measuring unit for measuring the concentration of hydrogen sulfide of the combustion air by passing a measurement beam of light through the combustion air at a measurement position downstream of the fuel supply unit in the direction of flow of the combustion air; and control unit for controlling the amount of air supplied from the fuel supply unit based on a measurement result provided by the concentration measuring unit.
    Type: Application
    Filed: February 19, 2010
    Publication date: April 5, 2012
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Masazumi Tanoura, Kenji Muta, Shinichiro Asami, Eiji Kato, Tadashi Aoki, Koutaro Fujimura, Tetsuya Sawatsubashi, Chisato Tsukahara, Shinsaku Dobashi
  • Publication number: 20110303135
    Abstract: An air preheater 100 is described having an air damper assembly 162 that partially restricts an air inlet 130 and a flue gas damper assembly 152 that partially restricts flue gas inlet 124 during periods of reduced boiler load. Restricting the flue gas inlet 124 reduces the effective surface area of the preheater causing more heat to pass to the cold end of the air preheater 100, reducing acid condensation and fouling. Restricting the gas inlet 124, increases gas velocity, thereby eroding accumulations in the air preheater 100, also reducing fouling. Restricting the air inlet 130 reduces the effective heat transfer surface area of the air preheater, which raises the gas temperature in the cold end of the air preheater and thereby reduces acid condensation and fouling.
    Type: Application
    Filed: June 14, 2010
    Publication date: December 15, 2011
    Applicant: ALSTOM TECHNOLOGY LTD
    Inventors: James W. Birmingham, James D. Seebald
  • Publication number: 20110271886
    Abstract: Emission of N2O is efficiently suppressed by supplying an appropriate amount of the N2O-decomposing particles. Disclosed is a combustor which controls emission of N2O generated upon combustion of a predetermined nitrogen-containing fuel, including the N2O-decomposing particles supply part 3 which supplies the particles being capable of decomposing N2O in the apparatus; a N2O concentration measurement meter 8a which measures the concentration of N2O contained in an exhaust gas; and a control part 10 which compares the measured N2O concentration value with a predetermined control value and controls the supply amount of the N2O-decomposing particles based on these comparison results.
    Type: Application
    Filed: December 28, 2009
    Publication date: November 10, 2011
    Inventor: Naoki Fujiwara
  • Publication number: 20110185952
    Abstract: To provide a burner structure in which a burner is capable of highly precisely controlling the flow rate of the air for combustion within itself. An air flow passage (11) in a wind box (12) for injecting the air for combustion into a furnace (1) has a bent portion (13) just before joining with the furnace, and one or a plurality of guide vanes (14) are provided in the air flow passage (11) in the bent portion (13), and also in the bent portion (13), a drift control damper (16) is provided for varying the ratio of flow passage resistances of each of the air flow passages (11) divided by the guide vanes (14).
    Type: Application
    Filed: July 24, 2008
    Publication date: August 4, 2011
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Ryuhei Takashima, Takuichiro Daimaru, Shinya Hamasaki