Sensor Of One Feed Controls Another Feed Patents (Class 431/90)
  • Patent number: 11105505
    Abstract: A method of controlling a premixing apparatus that mixes fuel gas with air and supplies thus obtained air-fuel mixture, through a fan to a burner, includes at a time of changing over to a small-capacity state in which a first ventilation resistance in an air supply passage is increased and also in which a second ventilation resistance in a gas supply passage is increased, rotating a butterfly valve down to a closing side stop angle; and at a time of changing over to a large-capacity state in which the first ventilation resistance in the air supply passage is decreased and also in which the second ventilation resistance in the gas supply passage is decreased, rotating the butterfly valve up to an open-side stop angle.
    Type: Grant
    Filed: June 14, 2019
    Date of Patent: August 31, 2021
    Assignee: RINNAI CORPORATION
    Inventor: Masao Nonoyama
  • Patent number: 11047573
    Abstract: Disclosed herein are embodiments of a flare control method and a flare apparatus for automatically controlling, in real-time, the flow of one or more of fuel, steam, and air to a flare. The disclosed embodiments advantageously allow for automated control over a wide spectrum of operating conditions, including emergency operations, and planned operations such as startup and shutdown.
    Type: Grant
    Filed: January 30, 2019
    Date of Patent: June 29, 2021
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Charles F. Fisher, Lee N. Green, Gregory G. Hendrickson, Thomas A. Lessard, Kenneth B. Moore, Daniel W. Peneguy
  • Patent number: 11027860
    Abstract: An air accelerator dosing tube for a form/fill/seal machine used to package fine cut tobacco material includes an axially-adjustable annular venturi communicating with the particulate material passage. A lining of polyether ether ketone optionally covers surfaces exposed to the particulate material. A metering assembly for delivering predetermined quantities of particulate material at predetermined time intervals may also be fabricated from polyether ether ketone. Each dosing tube is adapted for calibration by adjustment of the annular venturi to produce a predetermined force at a predetermined stand-off distance. In operation, consistent simultaneous operation of multiple dosing tubes, each of which has been calibrated, gives substantially uniform deposit of particulate material in pouch-type packages. The particulate material may include finely cut tobacco in addition to humectants, flavorants, and other tacky substances.
    Type: Grant
    Filed: May 8, 2018
    Date of Patent: June 8, 2021
    Assignee: Altria Client Services LLC
    Inventor: Dwight D. Williams
  • Patent number: 10931117
    Abstract: Arrangements of the present disclosure relate to a system including a datacenter, having an electrical connection configured to receive electrical power generated from landfill gas, a thermal connection configured to receive thermal energy generated as a byproduct of generating the electrical power from the landfill gas, a datacenter load powered by the electrical power, and a cooling plant configured to cool the datacenter load using the thermal energy.
    Type: Grant
    Filed: August 27, 2018
    Date of Patent: February 23, 2021
    Inventor: Patrick Robert Shoemaker
  • Patent number: 10801721
    Abstract: A gas-fired boiler comprises at least one burner (1) and feeding means (4) for feeding a fluid to such burner (1), said feeding means (4) being connected to a fan (5), a gas duct (7) being provided to feed gas to said fan (5). The burner comprises at least a first main flame-diffuser element (25) and a second auxiliary flame-diffuser element (26, the feeding means being a feeder duct (4) connected to the main diffuser element (25) and to the fan (5), said fluid comprising air or a mix of air and gas which is sent in such feeder duct (4), a tubular body (17) connected to the auxiliary diffuser element (26) opening in said duct (4), a gas carrying pipe (10) opening directly in such tubular body (17).
    Type: Grant
    Filed: July 20, 2016
    Date of Patent: October 13, 2020
    Assignee: POLIDORO S.P.A.
    Inventor: Domenico Peserico
  • Patent number: 10488078
    Abstract: A method of ensuring the safety of exhaust of a water heater includes the following steps: A. start the blower and detect a rotational speed of a motor thereof; B. determine a first range based on the detected rotational speed; C. start the blower and detect the rotational speed of the motor when the water heater is restarted again; D. keep supplying gas to the burner for combustion when the rotational speed detected in step C is within the first range. During operation, a second range is determined by detecting the rotational speed of the motor after an outlet water temperature reaches a corresponding constant temperature range; the rotational speed is continuously detected, and the gas supply is stopped if the detected rotational speed is out of the second range. Thereby, the result of the method would be more accurate regardless of the actual installed status of the exhaust pipe.
    Type: Grant
    Filed: June 28, 2016
    Date of Patent: November 26, 2019
    Assignee: GRAND MATE CO., LTD.
    Inventors: Chung-Chin Huang, Chin-Ying Huang, Hsin-Ming Huang, Hsing-Hsiung Huang, Yen-Jen Yeh, Kuan-Chou Lin
  • Patent number: 9534510
    Abstract: A waste-to-energy conversion apparatus comprising a primary combustion chamber capable of holding a load of waste, and the primary combustion chamber further comprises a heat source to heat the waste and generate a syn gas stream, grates, within the primary chamber, capable of supporting the load of waste during heating, a mixing chamber wherein the syn gas is mixed with additional combustion gas, a multi-chambered secondary combustion chamber for combusting the mixture of syn gas and additional combustion gas, and an energy extraction system for extracting the heat energy generated by the combustion of the mixture of syn gas and additional combustion gas.
    Type: Grant
    Filed: June 15, 2011
    Date of Patent: January 3, 2017
    Assignee: DYNAMIS ENERGY, LLC
    Inventors: Donald F. Kerr, Jonathan D. Kerr, Roger L. Kolb, C. Lloyd Mahaffey, Jr.
  • Patent number: 9032703
    Abstract: In a gas turbine engine that includes a compressor and a combustor, wherein the combustor includes a primary fuel injector within a fuel nozzle and a secondary fuel injector that is upstream of the fuel nozzle and configured to inject fuel into a flow annulus of the combustor, a method for detecting a flame holding condition about a fuel injector. The method may include the steps of: detecting an upstream pressure upstream of the secondary fuel injector; detecting a downstream pressure downstream of the secondary fuel injector; determining a measured pressure difference between the upstream pressure and the downstream pressure; and comparing the measured pressure difference to an expected pressure difference.
    Type: Grant
    Filed: June 20, 2011
    Date of Patent: May 19, 2015
    Assignee: General Electric Company
    Inventors: Anthony Wayne Krull, Gilbert Otto Kraemer, Garth Curtis Frederick, David Kaylor Toronto
  • Patent number: 9032950
    Abstract: Systems, methods, and controllers for controlling gas-fired appliances such as warm air furnaces are disclosed. An illustrative furnace system can include a burner unit in communication with a combustion air flow conduit and heat exchanger, a variable speed inducer fan or blower adapted to provide a flow of combustion air to the burner unit, a furnace controller and motor speed control unit adapted to regulate the speed of the inducer fan or blower, and a pneumatically modulated gas valve adapted to variably output gas pressure to the burner unit based at least in part on the combustion air flow.
    Type: Grant
    Filed: July 7, 2011
    Date of Patent: May 19, 2015
    Assignee: Honeywell International Inc.
    Inventor: Michael W. Schultz
  • Patent number: 8783243
    Abstract: A lockout control system for a cooktop appliance having a surface heating unit includes a controller coupled to the cooktop, a lockout device coupled to the controller, a surface burner state switch coupled between the controller and the lockout device, the surface burner state switch configured to prevent operation of the lockout device when the surface heating unit is enabled.
    Type: Grant
    Filed: October 25, 2010
    Date of Patent: July 22, 2014
    Assignee: General Electric Company
    Inventors: Leo Edward Hodapp, Jr., Michael Bernard Hitchcock, William Lee Holbrook
  • Patent number: 8772681
    Abstract: A blower urges an airflow, at a rate according to a user-controlled flow rate command, through an electric heater and the electrical heater heats the airflow at a heater power based on a user-input temperature command, the user-input flow rate command, and a measured mass flow rate of the airflow. The heater power is calculated based on the heat energy required to heat air to the given reference temperature, at a flow rate corresponding to the measured mass flow rate. Optionally, the temperature of the air entering the electric heater is measured, and the heater power is calculated based on the heat energy required to heat air from the measured temperature to the given reference temperature, at a flow rate corresponding to the measured mass flow rate.
    Type: Grant
    Filed: November 15, 2007
    Date of Patent: July 8, 2014
    Assignee: Electronic Instrumentation and Technology, Inc.
    Inventor: Joe T. May
  • Patent number: 8640731
    Abstract: A flow rate control device includes: a fuel gas supply channel having a flow rate adjusting valve; a thermal type mass flow rate sensor arranged in the supply channel; a calculation unit which calculates a thermal quantity flow rate of the fuel gas defined by a product of a volume flow rate of the fuel gas and a heat generation quantity per unit volume of the fuel gas according to an output from the thermal type sensor; and a flow rate control unit which controls the open degree of the flow rate adjusting valve according to a difference between a control target value for controlling the thermal quantity flow rate and the thermal quantity flow rate calculated by the calculation unit.
    Type: Grant
    Filed: January 7, 2009
    Date of Patent: February 4, 2014
    Assignee: Azbil Corporation
    Inventor: Junichi Isetani
  • Patent number: 8636024
    Abstract: A fuel supply device for generating mixed gas in which air and/or oxygen are mixed into fuel gas and supplying the mixed gas to a burning appliance comprises a flow rate control module disposed in a supply path of the fuel gas and flow rate control modules disposed in supply paths of the air and/or the oxygen. The flow rate control module includes a thermal mass flow rate sensor, a first calculator for calculating the thermal flow rate of the fuel gas from the output of the thermal mass flow rate sensor, a control computing unit for controlling the flow rate of the fuel gas via a flow rate regulating valve according to the calculated thermal flow rate, a second calculator for calculating the calculated calorific value per unit volume of the fuel gas, and a computing unit for computing the ratio of the calculated calorific value to the reference calorific value per unit volume of the fuel gas in a reference state.
    Type: Grant
    Filed: January 7, 2009
    Date of Patent: January 28, 2014
    Assignee: Azbil Corporation
    Inventor: Junichi Isetani
  • Patent number: 8635997
    Abstract: Systems and methods for controlling gas to gas-fired appliances are disclosed. An illustrative system can include a modulating gas valve adapted to supply gas to a burner unit, an inducer fan adapted to produce a combustion air flow at the burner unit, a pressure reducing element in fluid communication with the gas valve and adapted to output at least one pressure signal for sensing the combustion air flow outputted by the inducer fan, and a controller for controlling the speed of the inducer fan. The pressure reducing element can include a venturi tube, flow nozzle, or other suitable device capable of producing pneumatic signals that can be used by the gas valve to modulate the gas supplied to the burner unit. By pneumatically linking the gas valve to the actual combustion air flow, the gas valve can be operated over a wide range of firing rates by adjusting the speed of the inducer fan.
    Type: Grant
    Filed: October 18, 2006
    Date of Patent: January 28, 2014
    Assignee: Honeywell International Inc.
    Inventors: Michael W. Schultz, Glenn R. Bergum
  • Patent number: 8591221
    Abstract: A forced air furnace may include a pneumatically modulated gas valve that is configured to provide gas to a burner. A pneumatic sampling device may be disposed proximate a combustion blower and may be configured to provide the pneumatically modulated gas valve with a first pneumatic signal and a second pneumatic signal that are representative of fluid flow through the pneumatic sampling device. The pneumatically modulated gas valve may regulate gas flow in accordance with the first and second pneumatic signals. In some cases, the pneumatic sampling device may include a restriction, a first pressure port disposed upstream of the restriction and a second pressure port disposed downstream of the restriction. The first and second pressure ports may provide the first and second pneumatic signals to the pneumatically modulated gas valve.
    Type: Grant
    Filed: May 19, 2008
    Date of Patent: November 26, 2013
    Inventor: Michael W. Schultz
  • Patent number: 8550811
    Abstract: The present invention proposes a method for feeding hot gas to a shaft furnace (12), wherein the method comprises feeding a first portion (32) of a first gas flow (24) to a mixing chamber (36) and feeding a second portion (34) of the first gas flow (24) into said shaft furnace. The method further comprises feeding a second gas flow (28) to the mixing chamber (36), allowing the first portion (32) of the first gas flow (24) to mix with the second gas flow (28) in the mixing chamber (36), thereby forming a third gas flow (38), and feeding the third gas flow (38) to the shaft furnace (12). The first gas flow (24) has a first volumetric fluid flow rate (V1), a first temperature (T1) and a first pressure (p1); the second gas flow (28) has a second volumetric fluid flow rate (V2), a second temperature (T2) and a second pressure (p2); and the third gas flow (38) has a third volumetric fluid flow rate (V3), a third temperature (T3) and a third pressure (p3).
    Type: Grant
    Filed: March 15, 2010
    Date of Patent: October 8, 2013
    Assignee: Paul Wurth S.A.
    Inventors: Jean-Paul Simoes, Jean-Luc Roth
  • Patent number: 8434291
    Abstract: A system may detect a flame about a fuel nozzle of a gas turbine. The gas turbine may have a compressor and a combustor. The system may include a first pressure sensor, a second pressure sensor, and a transducer. The first pressure sensor may detect a first pressure upstream of the fuel nozzle. The second pressure sensor may detect a second pressure downstream of the fuel nozzle. The transducer may be operable to detect a pressure difference between the first pressure sensor and the second pressure sensor.
    Type: Grant
    Filed: January 8, 2009
    Date of Patent: May 7, 2013
    Assignee: General Electric Company
    Inventors: Gilbert Otto Kraemer, James Michael Storey, John Lipinski, Julio Enrique Mestroni, David Lee Williamson, Jason Randolph Marshall, Anthony Krull
  • Patent number: 8303297
    Abstract: A method and apparatus that applies corrections to the mass flow rate of combustion air into a gas or oil-fired, forced-draft burner, and thus provides for correcting the air-fuel ratio, by directly measuring the combustion air temperature and/or the barometric pressure of the combustion air, and using these measurements to develop a fan speed drive signal that corrects the volume of air inlet to the burner system without the use of the complex and expensive fully metered control systems, or elaborate feedback systems, or systems that require real-time combustion analysis, and the like.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: November 6, 2012
    Assignee: Webster Engineering & Manufacturing Co., LLC
    Inventors: Gene Tompkins, Alan Brennan, Jerry Kunkle
  • Publication number: 20120040297
    Abstract: An apparatus for mixing and proportioning oil and water comprises an upper lid, a first chunk member, a holder, a second chunk member and a base. The first chunk member and second chunk member have respectively an oil inlet, an oil-water mixture outlet and a water outlet that are connected with one another to receive and discharge oil and water. The first and second chunk members have respectively two oil flow gears and two water flow gears that engage with each other to control oil and water entering ratio to achieve optimal combustion efficiency. In the base, a located water regulation valve is adjusted to buffer water intake ratio responding to internal pressure alterations. The water regulation valve forms a buffer passage allowing different ratios of water to flow to the water in/out passage so that an improved oil-water mixture is achieved to enhance combustion efficiency of the combustion system.
    Type: Application
    Filed: August 11, 2010
    Publication date: February 16, 2012
    Inventor: Feng-Hui Lu
  • Patent number: 8109758
    Abstract: Disclosed is a method for detecting a combustion state of a boiler, and more particularly to a boiler and a method capable of exactly detecting an abnormal combustion state of a gas boiler using an air pressure sensor and a flame detection unit, thereby improving efficiency of the boiler.
    Type: Grant
    Filed: September 14, 2005
    Date of Patent: February 7, 2012
    Assignee: Kyungdong Network Co., Ltd.
    Inventor: Si Hwan Kim
  • Patent number: 8075304
    Abstract: A power burner system for use with a heating appliance includes a burner tube, a gas valve for providing gas to the burner tube, and a variable speed combustion air blower for mixing air with the gas provided to the burner tube. The burner system further includes a control in communication with the gas valve and the combustion air blower. The control may also be in communication with various other devices of an appliance, such as a variable speed air-circulating fan, a variable speed exhaust fan, or various sensors associated with the heating appliance. The control modulates the gas valve and the combustion air blower to maintain substantially stoichiometric conditions of the gas and air provided to the burner tube and as a function of signals from at least one of the devices. In one embodiment, the burner system may be used in a conveyor oven.
    Type: Grant
    Filed: April 20, 2007
    Date of Patent: December 13, 2011
    Assignee: Wayne/Scott Fetzer Company
    Inventors: Donald W. Cox, Syed Mohammad Shiblee Noman
  • Patent number: 8011921
    Abstract: Disclosed is a method for detecting a combustion state of a boiler, and more particularly to a boiler and a method capable of exactly detecting an abnormal combustion state of a gas boiler using an air pressure sensor and a flame detection unit, thereby improving efficiency of the boiler.
    Type: Grant
    Filed: June 16, 2010
    Date of Patent: September 6, 2011
    Assignee: Kyungdong Network Co., Ltd.
    Inventor: Si-Hwan Kim
  • Patent number: 7981200
    Abstract: A flare stack that preferably comprises a burner assembly, an exhaust stack, an housing, and a fuel line. The burner assembly burns a fuel to generate thermal energy and combustion byproducts. The exhaust stack is cooperatively associated with the burner assembly to direct the thermal energy and combustion byproducts away from the burner assembly. The housing at least partially defines a fluid-receiving chamber in thermal communication with the exhaust stack. The fluid-receiving chamber has a heat-transfer fluid disposed therein. The fuel line is in fluid communication with the burner assembly to deliver fuel to the burner assembly. At least a portion of the fuel line is in thermal communication with at least one of the exhaust stack, housing, or heat-transfer fluid to permit fuel in the fuel line to absorb thermal energy before reaching the burner assembly.
    Type: Grant
    Filed: October 19, 2010
    Date of Patent: July 19, 2011
    Inventors: E. Todd Wiggins, D. Jeffrey Hill
  • Patent number: 7874834
    Abstract: Disclosed is a combustion apparatus using an air fuel ratio sensor, which detects the operation of the air fuel sensor based on pressure of gas and air introduced into a combustion chamber and adjusts the amount of gas and air introduced into the combustion chamber using a controller based on data detected by the air fuel sensor.
    Type: Grant
    Filed: January 11, 2006
    Date of Patent: January 25, 2011
    Assignee: Kyungdong Network Co., Ltd.
    Inventor: Tae-Sik Min
  • Patent number: 7871263
    Abstract: A system for controlling air/fuel ratio in an air/fuel mixture supplied to a premix burner for gaseous fuels includes a blower (310) for inducting and pressurising combustion air, a Venturi-pipe (330) for governing a rate of gas to be mixed into the combustion air, and a pressure regulator (230) interconnecting a source of gaseous fuel to a supply point in the Venturi pipe (330). A preheated reaction chamber (500) and a lambda sond (620) are connected to a controller (350) controlling an amount of air bypassing said Venturi-pipe (330).
    Type: Grant
    Filed: March 23, 2006
    Date of Patent: January 18, 2011
    Assignee: Odena Engineering
    Inventor: Lars Svensson
  • Patent number: 7857898
    Abstract: A flare stack that preferably comprises a burner assembly, an exhaust stack, an housing, and a fuel line. The burner assembly burns a fuel to generate thermal energy and combustion byproducts. The exhaust stack is cooperatively associated with the burner assembly to direct the thermal energy and combustion byproducts away from the burner assembly. The housing at least partially defines a fluid-receiving chamber in thermal communication with the exhaust stack. The fluid-receiving chamber has a heat-transfer fluid disposed therein. The fuel line is in fluid communication with the burner assembly to deliver fuel to the burner assembly. At least a portion of the fuel line is in thermal communication with at least one of the exhaust stack, housing, or heat-transfer fluid to permit fuel in the fuel line to absorb thermal energy before reaching the burner assembly.
    Type: Grant
    Filed: July 25, 2007
    Date of Patent: December 28, 2010
    Inventors: E. Todd Wiggins, D. Jeffrey Hill
  • Publication number: 20100316964
    Abstract: A combustion control system [100] for a combustion system [7] having a plurality of fuel pipes [5]. The combustion control system [100] including a plurality of flow meters [10], a controller [8], fuel flow controls [11] and secondary air controls [61,62,72]. Each meter [10] is adapted to monitor flow of fuel within a respective one of the fuel pipes [5] by sensing a pressure field within the fuel pipe [5]. A controller [8] receives the flow information from each of the flow meters [10], to evaluate performance of the combustion system [7]. Controller [8] also providing control information for controlling the flow of secondary air dampers [61,62,71] into the combustion system [7], and optionally controlling the flow of fuel in each fuel pipe [5].
    Type: Application
    Filed: June 11, 2009
    Publication date: December 16, 2010
    Applicant: ALSTOM Technology Ltd
    Inventors: Randal M. Racine, Michael C. Tanca
  • Patent number: 7758335
    Abstract: A method for utilizing a combustible gas product collected in the seal device of a compressor of the combustible gas produce, in particular a method in which combustible gases, or gas mixtures containing combustible gases, are compressed, is provided. The method is particularly advantageous in applications in the field of the production and/or processing of synthesis gas, for producing and/or processing combustible gases or gas mixtures containing combustible gases including in particular H2, CO, CH4, natural gas and CO2.
    Type: Grant
    Filed: May 11, 2006
    Date of Patent: July 20, 2010
    Assignee: L'Air Liquide, Societe Anonyme a Directoire et Conseil de Surveillance pour I'Etude et I'Exploitation des Procedes Georges Claude
    Inventors: Pascal Marty, Marie-Pascal Victor
  • Patent number: 7744366
    Abstract: A system and method for providing a heating system with good thermal efficiency by adjusting combustion air flow in response to fuel-input rate changes over a wide range. An AC motor operates in a slip mode whereby as the fuel-input rate changes, the combustion air density is affected. In response, changes in the load and thus the speed of the motor occur. Consequently, the quantity of combustion air flow increases in response to a fuel-input rate increase. The motor switches to a synchronous speed in response to the fuel-input rate reaching a set value, e.g., 70 percent of maximum rate.
    Type: Grant
    Filed: October 17, 2005
    Date of Patent: June 29, 2010
    Assignee: Thomas & Betts International, Inc.
    Inventor: Werner Specht
  • Publication number: 20100047726
    Abstract: A pilot and burner assembly includes a burner assembly and a blower for supplying combustion air to the burner assembly. The system further includes a pilot assembly and a fuel supply for providing fuel to the pilot assembly. A pilot fan provides pilot air to the pilot assembly, the pilot fan being separate from the blower and provides air only to the pilot assembly.
    Type: Application
    Filed: August 18, 2009
    Publication date: February 25, 2010
    Applicant: MESTEK, INC.
    Inventors: John P. CHICOINE, Kenneth W. COHEN
  • 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: 20090111065
    Abstract: A method and apparatus that applies corrections to the mass flow rate of combustion air into a gas or oil-fired, forced-draft burner, and thus provides for correcting the air-fuel ratio, by directly measuring the combustion air temperature and/or the barometric pressure of the combustion air, and using these measurements to develop a fan speed drive signal that corrects the volume of air inlet to the burner system without the use of the complex and expensive fully metered control systems, or elaborate feedback systems, or systems that require real-time combustion analysis, and the like.
    Type: Application
    Filed: October 31, 2007
    Publication date: April 30, 2009
    Inventors: Gene Tompkins, Alan Brennan, Jerry Kunkle
  • Publication number: 20090042152
    Abstract: First, to decrease an amount of emitted nitrogen oxides to zero as much as possible and also decrease an amount of emitted carbon monoxide to a permissible level. Second, to save energy on combustion at a low air ratio close to 1.0. Third, to attain a stable air ratio control in a low air ratio combustion region.
    Type: Application
    Filed: April 13, 2007
    Publication date: February 12, 2009
    Applicant: MIURA CO., LTD.
    Inventors: Osamu Tanaka, Yukihiro Tokunaga, Yusuke Okamoto, Kenji Yasui
  • Patent number: 7396228
    Abstract: Calories of a first mixed gas are predicted by calculations based on the mixed flow rate of a blast furnace gas and the mixed flow rate of a converter gas measured by flow meters, and preset blast furnace gas calories and converter gas calories; the flow rate ratio of the mixed flow rate of a coke oven gas to a gas turbine consumed fuel gas flow rate is calculated based on the predicted calories, set calories, and preset coke oven gas calories; the mixed flow rate required value of the coke oven gas is calculated based on the flow rate ratio and a gas turbine fuel gas requirement signal corresponding to the gas turbine consumed fuel gas flow rate; and the opening of a coke oven gas flow control valve provided in a fuel gas production system is controlled, based on the mixed flow rate required value, to control the mixed flow rate of the coke oven gas.
    Type: Grant
    Filed: February 22, 2006
    Date of Patent: July 8, 2008
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Hiroshi Tanabe, Hidekazu Yamashita
  • Publication number: 20080124668
    Abstract: Systems and methods for controlling gas to gas-fired appliances are disclosed. An illustrative system can include a modulating gas valve adapted to supply gas to a burner unit, an inducer fan adapted to produce a combustion air flow at the burner unit, a pressure reducing element in fluid communication with the gas valve and adapted to output at least one pressure signal for sensing the combustion air flow outputted by the inducer fan, and a controller for controlling the speed of the inducer fan. The pressure reducing element can include a venturi tube, flow nozzle, or other suitable device capable of producing pneumatic signals that can be used by the gas valve to modulate the gas supplied to the burner unit. By pneumatically linking the gas valve to the actual combustion air flow, the gas valve can be operated over a wide range of firing rates by adjusting the speed of the inducer fan.
    Type: Application
    Filed: October 18, 2006
    Publication date: May 29, 2008
    Applicant: HONEYWELL INTERNATIONAL INC.
    Inventors: Michael W. Schultz, Glenn R. Bergum
  • Publication number: 20080118877
    Abstract: Disclosed are a system and a method for precisely controlling an air fuel ratio of an oil burner, which is extensively used in a household boiler, an industrial boiler, or a heater, using an air pressure sensor. The system includes a power supplying part, a fan for supplying air required for combustion of the oil burner by receiving driving voltage from the power supplying part, a fan driving part serving as a controller which drives the fan, an air pressure sensor, which is installed at a side of a flow path of air supplied from the fan so as to detect an amount of the supplied air, and a control part for outputting an optimum RPM of the fan to the fan driving part by comparing a signal detected by the air pressure sensor with preset data related to an optimum amount of air.
    Type: Application
    Filed: January 11, 2006
    Publication date: May 22, 2008
    Applicant: KYUNGDONG NETWORK CO., LTD.
    Inventor: Tae-Sik Min
  • Publication number: 20080113307
    Abstract: Disclosed is a combustion apparatus using an air fuel ratio sensor, which detects the operation of the air fuel sensor based on pressure of gas and air introduced into a combustion chamber and adjusts the amount of gas and air introduced into the combustion chamber using a controller based on data detected by the air fuel sensor.
    Type: Application
    Filed: January 11, 2006
    Publication date: May 15, 2008
    Applicant: Kyungdong Network Co., Ltd.
    Inventor: Tae-Sik Min
  • Patent number: 7249610
    Abstract: For adjustment of a desired burner gas-air ratio over the broadest possible load range without additional pressure tapping of the burner, combustion chamber, or air lines, a ratio controller is provided that permits adjustment of the gas flow as a function of counterpressure. For adjustment, the ratio controller has at least one position-variable measurement site, or at least two measurement sites, connected directly or indirectly via a pilot valve, to an actuating diaphragm via a valve block or throttle valve block. Depending on whether the control pressure is picked up more from one or more from the other measurement site, the gas flow and therefore the gas-air ratio can be adjusted to be larger or smaller.
    Type: Grant
    Filed: August 27, 2004
    Date of Patent: July 31, 2007
    Assignee: Karl Dungs Gmbh & Co. KG
    Inventor: Johann Moses
  • Patent number: 7090486
    Abstract: The invention relates to a control system (15) for a burner and a setting-up procedure. The control system (15) controls the air ratio for combustion using the ionisation electrode (16). For calibration, a change is carried out in a first parameter, and the subsequent change in a second parameter is observed. Accurate expected values for the change observed come from stored characteristic data that have been determined in the setting-up procedure, and from taking into account the current combustive content of air and fuel. This allows corrective measures or fault signals to be established.
    Type: Grant
    Filed: September 3, 2002
    Date of Patent: August 15, 2006
    Assignee: Siemens Building Technologies AG
    Inventor: Rainer Lochschmied
  • Patent number: 7048536
    Abstract: The “fuel-air pressure ratio” combustion control system for maintaining a selected fuel-air ratio for a combustion apparatus supplied with air at a substantially constant volumetric rate is improved by means for adjusting the flow rate of fuel in relation to temperature fluctuations of the air. A temperature sensor positioned in the air stream before it mixes with the fuel is connected to a converter which transmits converted temperature signals from the sensor as adjustments of a remote control, secondary valve in the fuel line downstream of a primary valve regulating the flow of fuel. Fuel temperature fluctuations can also be converted into adjustments of the remote control, secondary valve.
    Type: Grant
    Filed: April 25, 2003
    Date of Patent: May 23, 2006
    Assignee: Alzeta Corporation
    Inventors: John D. Sullivan, Luis H. Morales, Robert W. Nickeson
  • Patent number: 7004749
    Abstract: A combustion apparatus 2 has a fuel spraying nozzle 12, a feed canal 16 and a return canal 17, both the canals connected to the nozzle, with the former canal 16 feeding a fuel to the nozzle and with the later canal 17 allowing an unsprayed portion of the fuel to flow back. An electro-magnetic pump 18 disposed in the feed canal 16 serves to compress the fuel towards the nozzle 12, and an injector valve 25 is disposed in the return canal 17. A low rate at which the fuel is sprayed out from the nozzle is controlled by a controlling means 40 by regulating the mode of opening and closing the valve body 33 of injector valve 25.
    Type: Grant
    Filed: August 28, 2003
    Date of Patent: February 28, 2006
    Assignee: Noritz Corporation
    Inventors: Kimiaki Asano, Hitoshi Hara, Tetsurou Hamada, Toshihiro Hori, Hiroki Hasegawa
  • Patent number: 6991451
    Abstract: A control apparatus simultaneously controls flow rates of a first fluid and a second fluid. The apparatus comprises a control valve for controlling the flow rate of the first fluid and a bleed device for bleeding the second fluid. The control valve is operatively connected to the bleed device, whereby, as the control valve is opened progressively greater amounts to increase flow of the first fluid, the bleed device is progressively closed to decrease bleeding of the second fluid, and, as the control valve is closed progressively greater amounts to decrease flow of the first fluid, the bleed device is progressively opened to increase bleeding of the second fluid. The control apparatus may be installed in a burner unit of the type having a compressor supplying pressurized air to the burner and a fuel pump supplying fuel to the burner. The control valve controls the fuel and the bleed device increases bleeding of the air as the control valve closes.
    Type: Grant
    Filed: November 29, 2004
    Date of Patent: January 31, 2006
    Assignee: Teleflex Canada Incorporated
    Inventor: Alexander Schwartzman
  • Patent number: 6904873
    Abstract: A fuel-fired boiler having a supply fan for providing essentially all of its combustion air requirements and has a non-aspirating type burner section to an inlet portion of which pressure regulator apparatus is coupled, the pressure regulator apparatus having a predetermined pressure regulation setting. Fuel delivery apparatus is coupled to the inlet of the pressure regulator apparatus and is operative to deliver thereto, from sources thereof, a selectively variable one of (1) a first fuel at a pressure greater than the pressure regulation setting, and (2) a second fuel at a pressure less than the pressure regulation setting, the second fuel having a Wobbe index greater than that of the first fuel. The design of the fuel delivery apparatus permits the burner section firing rate to remain essentially constant, without modifying the burner section, regardless of which of the two fuels is being utilized.
    Type: Grant
    Filed: January 20, 2004
    Date of Patent: June 14, 2005
    Assignee: Rheem Manufacturing Company
    Inventor: Larry J. Ashton
  • Patent number: 6872071
    Abstract: The invention relates to a device for adjusting the mixture of oxidation agent/fuel in the feeding pipe (22) of a burner. Said device comprises means (32, 12) for changing the composition of the oxidation agent/fuel mixture and a measuring instrument (2) for detecting the condition of the oxidation agent/fuel mixture and a circuit (28) for controlling said means (32, 12) for changing the composition on the basis of the condition detected by the measuring instrument. The invention is characterized in that the measuring instrument detects the condition of at least one partial mixture of the oxidation agent/fuel mixture via the viscosity or a function therefore before the combustion and that it is located upstream, in terms of the direction of flow, of the means (32, 12) for changing the composition.
    Type: Grant
    Filed: April 26, 2000
    Date of Patent: March 29, 2005
    Assignee: Gesellschaft zur Verwertung der Gasartenerkennungstechnik in Brennersystemen (GVGB)
    Inventor: Franz Durst
  • Publication number: 20040146822
    Abstract: A control apparatus simultaneously controls flow rates of a first fluid and a second fluid. The apparatus comprises a control valve for controlling the flow rate of the first fluid and a bleed device for bleeding the second fluid. The control valve is operatively connected to the bleed device, whereby, as the control valve is opened progressively greater amounts to increase flow of the first fluid, the bleed device is progressively closed to decrease bleeding of the second fluid, and, as the control valve is closed progressively greater amounts to decrease flow of the first fluid, the bleed device is progressively opened to increase bleeding of the second fluid. The control apparatus may be installed in a burner unit of the type having a compressor supplying pressurized air to the burner and a fuel pump supplying fuel to the burner. The control valve controls the fuel and the bleed device increases bleeding of the air as the control valve closes.
    Type: Application
    Filed: January 24, 2003
    Publication date: July 29, 2004
    Inventor: Alexander Schwartzman
  • Patent number: 6764298
    Abstract: A method is provided for controlling an air fuel ratio in a gas furnace which can maintain optimum performance in combustion, irrespective of variation in temperature control stages. Air quantity and fuel quantity are integrally, rather than separately, controlled through the detection and adjustment of variation in each until the air fuel ratio reaches an objective value. In this manner, transient phenomena caused during the burning operation is prevented, and optimum combustion performance is maintained regardless of the temperature variation.
    Type: Grant
    Filed: August 13, 2001
    Date of Patent: July 20, 2004
    Assignee: LG Electronics Inc.
    Inventors: Ji Won Kim, Young Soo Kim, In Kyu Kim
  • Patent number: 6749423
    Abstract: An improved gas appliance having a burner, a gas valve through which the flow of combustion gas to the burner is controlled, and a motor driven blower that supplies combustion air to the burner. The improvement includes means for increasing gas flow through the gas valve as blower speed increases, and decreasing gas flow through the gas valve as blower speed decreases, based on a pressure signal generated independently of combustion air pressure. This improvement allows a constant ratio of gas to air to be maintained in the burner while a combustion flow rate varies dependent on the blower motor revolutions per minute. Thus input pressures of combustion can be controlled at low cost.
    Type: Grant
    Filed: October 30, 2001
    Date of Patent: June 15, 2004
    Assignee: Emerson Electric Co.
    Inventors: Thomas J. Fredricks, Donald E. Donnelly, Russell T. Shoemaker
  • Patent number: 6579087
    Abstract: The invention relates to a control means for gas burners. Control means for gas burners are used for supplying a gas flow and a combustion air flow to a burner. In this procedure, the gas flow is adjustable in dependence on the combustion air pressure. In the case of known control means, pressure measurement is effected by means of a diaphragm, i.e. pneumatically. This pneumatic pressure measurement restricts the scope of application of known control means. In the case of the control means according to the invention, there is provided a sensor (16) which generates an electric or electronic signal 19 which is used for adjusting the gas valve 11 (FIG. 1).
    Type: Grant
    Filed: April 3, 2002
    Date of Patent: June 17, 2003
    Assignee: Honeywell International Inc.
    Inventor: Enno Vrolijk
  • Patent number: 6561791
    Abstract: The invention relates to a regulating system for a gas burner. Regulating systems for gas burners are used for guiding a gas flow and a combustion air flow to the burner. The gas flow can be regulated depending on combustion air pressure. Pressure is measured in known regulating devices with the aid of a membrane, that is pneumatically. The pneumatic pressure measurement limits the scope of application of known regulating devices. In the invention regulating device, a sensor (16) is arranged between a first line (10) guiding a gas flow and a second line (12) guiding the combustion air flow, an electric or electronic signal (19) being generated by the sensor that is used to regulate the gas valve (11).
    Type: Grant
    Filed: March 9, 2001
    Date of Patent: May 13, 2003
    Assignee: Honeywell International Inc.
    Inventors: Enno Vrolijk, Tom Gerretsen
  • Patent number: 6537060
    Abstract: A burner system for controlling the gas/air mixture of a burner has a sensor providing a signal dependent on the pressures in gas and air lines supplying the burner. A summing device receives a signal based on the air flow rate and the signal from the sensor, and provides a regulating signal controlling the setting of a gas regulating valve regulating the flow of gas in the gas line.
    Type: Grant
    Filed: July 3, 2002
    Date of Patent: March 25, 2003
    Assignee: Honeywell International Inc.
    Inventor: Derk Vegter