Patents by Inventor Dragisa RISTIC
Dragisa RISTIC has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11859817Abstract: A system and method of igniting a coal air-fuel mixture, including a burner having a burner tube operable to carry a flowing mixture of fuel and air to a furnace for combustion therein and a first flow directing device disposed within the tube, operable to direct a first portion of the flowing fuel and air mixture to a location in the burner tube. The system also includes a laser igniter within the burner tube, the laser igniter including a laser tube having a first end with a laser light input and a second end with a light output, and a laser light source operably coupled to the laser light input. The laser light source, including a laser. The laser ignitor directing photons from the light output at the location in the burner tube to ignite at least a part of the first portion of the fuel.Type: GrantFiled: December 7, 2020Date of Patent: January 2, 2024Assignee: GENERAL ELECTRIC COMPANYInventors: Sameer Dinkar Vartak, Sreenivasa Rao Gubba, Kamesh Lakshmi Narayanan, Arun Kumar Sridharan, Ankur Maheshwari, Dragisa Ristic, Moorthi Subramaniyan
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Publication number: 20230213185Abstract: A combustion system comprising a burner for supplying a mixed flow of fuel and primary air or gas through at least one fuel nozzle to a combustion chamber, a duct in fluid communication with the at least one fuel nozzle for guiding the mixed flow to the at least one fuel nozzle, and a deflector device positioned within the duct upstream of the at least one fuel nozzle to deflect the incoming mixed flow. The deflector device comprises ejection means arranged to eject an auxiliary gas into the duct to deflect the incoming mixed flow in a direction from a center to outer areas of the duct to increase the concentration of the mixed flow in outer areas of the fuel nozzle and decrease the concentration of the mixed flow in the center section of the fuel nozzle.Type: ApplicationFiled: April 13, 2021Publication date: July 6, 2023Inventors: Jakob HEIMANN, Dragisa RISTIC, Andrej OWERTSCHUK, Wadim PIMENOV
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Publication number: 20220178539Abstract: A system and method of igniting a coal air-fuel mixture, including a burner having a burner tube operable to carry a flowing mixture of fuel and air to a furnace for combustion therein and a first flow directing device disposed within the tube, operable to direct a first portion of the flowing fuel and air mixture to a location in the burner tube. The system also includes a laser igniter within the burner tube, the laser igniter including a laser tube having a first end with a laser light input and a second end with a light output, and a laser light source operably coupled to the laser light input. The laser light source, including a laser. The laser ignitor directing photons from the light output at the location in the burner tube to ignite at least a part of the first portion of the fuel.Type: ApplicationFiled: December 7, 2020Publication date: June 9, 2022Applicant: GENERAL ELECTRIC COMPANYInventors: SAMEER DINKAR VARTAK, SREENIVASA RAO GUBBA, KAMESH LAKSHMI NARAYANAN, ARUN KUMAR SRIDHARAN, ANKUR MAHESHWARI, DRAGISA RISTIC, MOORTHI SUBRAMANIYAN
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Patent number: 10976050Abstract: A method for preheating a beater mill is provided. The method includes: rotating a beater wheel disposed within the beater mill to facilitate circulation of a gas stream between the beater mill and a furnace fluidly connected to each other via both a pulverized fuel conduit and a flue gas recirculation conduit; generating a burner gas via a burner disposed within the flue gas recirculation conduit such that the burner gas joins and heats the gas stream circulating through the beater mill and the furnace; and adjusting at least one of an air supply and a fuel supply to the burner via a controller based at least in part on one of a temperature of the gas stream at an entrance of the beater mill, a temperature of the gas stream at an exit of the beater mill, and an oxygen level within the beater mill.Type: GrantFiled: April 15, 2020Date of Patent: April 13, 2021Assignee: GENERAL ELECTRIC TECHNOLOGY GMBHInventors: Dragisa Ristic, Rajkumar Daniel, Frank Michael Kluger
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Patent number: 10955131Abstract: A combustion system with a combustion area in a boiler including a fuel pipe for delivering fuel is disclosed. A duct having a bend extended there through is in fluid communication with the fuel pipe and the combustion area of the boiler. The duct has an outer perimeter and an inner perimeter. The duct includes a first partition plate to form a first parallel flow of the fuel between the outer perimeter and the first partition plate, upstream of the bend.Type: GrantFiled: August 4, 2016Date of Patent: March 23, 2021Assignee: GENERAL ELECTRIC TECHNOLOGY GMBHInventors: Dragisa Ristic, Frank Michael Kluger
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Patent number: 10948182Abstract: The present disclosure relates to a system and a method for combustion of solid fuels. The combustion system includes burners which supply a mixed flow of fuel and air through a fuel nozzle to the combustion chamber for example of a boiler. The mixed flow of fuel and primary air is supplied to the burner through a duct from a pulverizer where the fuel is grinded to the required finesse. The duct further bends in such a way that one portion is vertical with respect parallel to axis of the boiler 1 A-A is vertical duct and other portion is horizontal duct which is parallel to axis B-B of the fuel nozzle.Type: GrantFiled: November 6, 2015Date of Patent: March 16, 2021Assignee: GENERAL ELECTRIC TECHNOLOGY GMBHInventors: Thomas Hilber, Thomas Wild, Dragisa Ristic, Noel Francon
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Publication number: 20200240633Abstract: A method for preheating a beater mill is provided. The method includes: rotating a beater wheel disposed within the beater mill to facilitate circulation of a gas stream between the beater mill and a furnace fluidly connected to each other via both a pulverized fuel conduit and a flue gas recirculation conduit; generating a burner gas via a burner disposed within the flue gas recirculation conduit such that the burner gas joins and heats the gas stream circulating through the beater mill and the furnace; and adjusting at least one of an air supply and a fuel supply to the burner via a controller based at least in part on one of a temperature of the gas stream at an entrance of the beater mill, a temperature of the gas stream at an exit of the beater mill, and an oxygen level within the beater mill.Type: ApplicationFiled: April 15, 2020Publication date: July 30, 2020Applicant: GENERAL ELECTRIC TECHNOLOGY GMBHInventors: DRAGISA RISTIC, RAJKUMAR DANIEL, FRANK MICHAEL KLUGER
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Patent number: 10711994Abstract: An ignition system includes a pulverized fuel pipe receiving a mixture of pulverized fuel and primary air for injection into a combustion chamber for combustion, and an igniter received within the pulverized fuel pipe for igniting the mixture. The igniter is axially movable within the pulverized fuel pipe.Type: GrantFiled: January 19, 2017Date of Patent: July 14, 2020Assignee: GENERAL ELECTRIC TECHNOLOGY GMBHInventors: Dragisa Ristic, Hans-Peter Schommer, Frank Kluger
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Patent number: 10655851Abstract: A method for preheating a beater mill is provided. The method includes: rotating a beater wheel disposed within the beater mill to facilitate circulation of a gas stream between the beater mill and a furnace fluidly connected to each other via both a pulverized fuel conduit and a flue gas recirculation conduit; generating a burner gas via a burner disposed within the flue gas recirculation conduit such that the burner gas joins and heats the gas stream circulating through the beater mill and the furnace; and adjusting at least one of an air supply and a fuel supply to the burner via a controller based at least in part on one of a temperature of the gas stream at an entrance of the beater mill, a temperature of the gas stream at an exit of the beater mill, and an oxygen level within the beater mill.Type: GrantFiled: December 2, 2016Date of Patent: May 19, 2020Assignee: GENERAL ELECTRIC TECHNOLOGY GMBHInventors: Dragisa Ristic, Rajkumar Daniel, Frank Michael Kluger
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Patent number: 10473327Abstract: A pre-ignition conduit for a pulverized fuel nozzle includes a duct having first and second opposing end portions, the first end portion configured to face an outlet of an igniter. The conduit further includes a cone-shaped concentrator for collecting and forwarding pulverized fuel into the duct for ignition, the cone-shaped concentrator being secured to the first end portion and located between the outlet of the igniter and the duct. The pre-ignition conduit functions as an ignition chamber within a pulverized fuel nozzle.Type: GrantFiled: June 9, 2016Date of Patent: November 12, 2019Assignee: GENERAL ELECTRIC TECHNOLOGY GMBHInventors: Dragisa Ristic, Klemens Jakob Harter, Frank Michael Kluger
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Publication number: 20180202649Abstract: An ignition system includes a pulverized fuel pipe receiving a mixture of pulverized fuel and primary air for injection into a combustion chamber for combustion, and an igniter received within the pulverized fuel pipe for igniting the mixture. The igniter is axially movable within the pulverized fuel pipe.Type: ApplicationFiled: January 19, 2017Publication date: July 19, 2018Applicant: GENERAL ELECTRIC TECHNOLOGY GMBHInventors: DRAGISA RISTIC, HANS-PETER SCHOMMER, FRANK KLUGER
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Publication number: 20180156455Abstract: A method for preheating a beater mill is provided. The method includes: rotating a beater wheel disposed within the beater mill to facilitate circulation of a gas stream between the beater mill and a furnace fluidly connected to each other via both a pulverized fuel conduit and a flue gas recirculation conduit; generating a burner gas via a burner disposed within the flue gas recirculation conduit such that the burner gas joins and heats the gas stream circulating through the beater mill and the furnace; and adjusting at least one of an air supply and a fuel supply to the burner via a controller based at least in part on one of a temperature of the gas stream at an entrance of the beater mill, a temperature of the gas stream at an exit of the beater mill, and an oxygen level within the beater mill.Type: ApplicationFiled: December 2, 2016Publication date: June 7, 2018Applicant: GENERAL ELECTRIC TECHNOLOGY GMBHInventors: DRAGISA RISTIC, RAJKUMAR DANIEL, FRANK MICHAEL KLUGER
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Publication number: 20170356643Abstract: A pre-ignition conduit for a pulverized fuel nozzle includes a duct having first and second opposing end portions, the first end portion configured to face an outlet of an igniter. The conduit further includes a cone-shaped concentrator for collecting and forwarding pulverized fuel into the duct for ignition, the cone-shaped concentrator being secured to the first end portion and located between the outlet of the igniter and the duct. The pre-ignition conduit functions as an ignition chamber within a pulverized fuel nozzle.Type: ApplicationFiled: June 9, 2016Publication date: December 14, 2017Applicant: GENERAL ELECTRIC TECHNOLOGY GMBHInventors: DRAGISA RISTIC, KLEMENS JAKOB HARTER, FRANK MICHAEL KLUGER
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Publication number: 20170045218Abstract: A combustion system with a combustion area in a boiler including a fuel pipe for delivering fuel is disclosed. A duct having a bend extended there through is in fluid communication with the fuel pipe and the combustion area of the boiler. The duct has an outer perimeter and an inner perimeter. The duct includes a first partition plate to form a first parallel flow of the fuel between the outer perimeter and the first partition plate, upstream of the bend.Type: ApplicationFiled: August 4, 2016Publication date: February 16, 2017Inventors: Dragisa RISTIC, Frank Michael KLUGER
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Publication number: 20160153657Abstract: The present disclosure relates to a system and a method for combustion of solid fuels. The combustion system includes burners which supply a mixed flow of fuel and air through a fuel nozzle to the combustion chamber for example of a boiler. The mixed flow of fuel and primary air is supplied to the burner through a duct from a pulverizer where the fuel is grinded to the required finesse. The duct further bends in such a way that one portion is vertical with respect parallel to axis of the boiler 1 A-A is vertical duct and other portion is horizontal duct which is parallel to axis B-B of the fuel nozzle.Type: ApplicationFiled: November 6, 2015Publication date: June 2, 2016Inventors: Thomas HILBER, Thomas WILD, Dragisa RISTIC, Noel FRANCON
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Publication number: 20150226431Abstract: The igniter lance include a lance fuel duct for pulverised fuel and an electric igniter for ignition of the pulverized fuel passing through the lance fuel duct.Type: ApplicationFiled: February 11, 2015Publication date: August 13, 2015Inventors: Dragisa RISTIC, Thomas HILBER, Patrick MOENCKERT, Frank Michael KLUGER