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公开(公告)号：US20210063086A1
公开(公告)日：2021-03-04
申请号：US17014589
申请日：2020-09-08
Applicant: ClearSign Technologies Corporation
Inventor： DOUGLAS W. KARKOW , JAMES K. DANSIE , VENKATESH IYER , DONALD KENDRICK , COLIN JAMES DELLER , CHRISTOPHER A. WIKLOF
Abstract: A combustion system includes a fuel and oxidant source, a first distal flame holder body, a second distal flame holder body, and a thermal load. The fuel and oxidant source outputs fuel and oxidant. The first and second distal flame holder bodies simultaneously or alternately hold combustion reaction portions of the fuel and oxidant and/or of combustion products. The thermal load receives thermal energy from the first and second combustion reaction portions.
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公开(公告)号：US20240401798A1
公开(公告)日：2024-12-05
申请号：US18737219
申请日：2024-06-07
Applicant: ClearSign Technologies Corporation
Inventor： Donald Kendrick , William A. Santana , Venkatesh Iyer
Abstract: According to embodiments, burner systems include a first plurality of main fuel nozzles positioned in a flame tube or combustion chamber and configured to supply a flow of main fuel to a burner in the flame tube, and a second plurality of main fuel nozzles positioned outside the flame tube or combustion chamber and configured to introduce a flow of main fuel into a combustion air flow that is introduced to the burner.
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公开(公告)号：US11460188B2
公开(公告)日：2022-10-04
申请号：US16444420
申请日：2019-06-18
Applicant: ClearSign Technologies Corporation
Inventor： Donald Kendrick , Douglas W. Karkow , Venkatesh Iyer , James K. Dansie , Jonathan Bucher , Aaron Salzbrun
Abstract: According to an embodiment, a fired heater includes a fuel and combustion air source configured to output fuel and combustion air into a combustion volume, the combustion volume including a combustion volume wall defining a lateral extent separate from an exterior volume. According to an embodiment, the fired heater includes a boiler heater and the combustion volume wall comprises a combustion pipe defining a lateral extent of the combustion volume, the combustion pipe being disposed to separate the combustion volume from a water and steam volume. The fired heater includes a mixing tube aligned to receive the fuel and combustion air from the fuel and combustion air source. The mixing tube may be separated from the combustion volume wall by a separation volume. The fired heater includes a bluff body flame holder aligned to receive a fuel and combustion air mixture from an outlet end of the mixing tube. The bluff body flame holder may be configured to hold a combustion reaction for heating a combustion volume wall. The combustion volume wall may include a combustion pipe. The combustion pipe may be configured to heat the water in the water and steam volume.
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公开(公告)号：US20220299203A1
公开(公告)日：2022-09-22
申请号：US17658248
申请日：2022-04-06
Applicant: CLEARSIGN TECHNOLOGIES CORPORATION
Inventor： James K. DANSIE , Douglas W. KARKOW , Jesse DUMAS , Donald KENDRICK , Sunny KARNANI , Christopher A. WIKLOF
Abstract: A combustion system includes a fuel and oxidant source that outputs fuel and oxidant, a first perforated flame holder, and a second perforated flame holder separated from the first perforated flame holder by a gap. The first and second perforated flame holders sustain a combustion reaction of the fuel and oxidant within the first and second perforated flame holders.
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公开(公告)号：US10808927B2
公开(公告)日：2020-10-20
申请号：US15091906
申请日：2016-04-06
Applicant: ClearSign Combustion Corporation
Inventor： Douglas W. Karkow , Joseph Colannino , Robert E. Breidenthal , Christopher A. Wiklof
IPC: F23C5/00 , F23D14/02 , F23D14/26 , F23C9/06 , F23N1/02 , F23N5/00 , F23D14/82 , F23C6/04 , F23D14/14 , F23D14/62
Abstract: A combustion system such as a furnace or boiler includes a perforated reaction holder configured to hold a combustion reaction that produces very low oxides of nitrogen (NOx).
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Patent Agency Ranking
公开(公告)号：US10760784B2
公开(公告)日：2020-09-01
申请号：US15823419
申请日：2017-11-27
Applicant: CLEARSIGN TECHNOLOGIES CORPORATION
Inventor： Douglas W. Karkow , Joseph Colannino , Igor A. Krichtafovitch , Robert E. Breidenthal , Christopher A. Wiklof
IPC: F23C5/08 , F23D14/14 , F23D14/20 , F23D14/74 , F23M5/02 , F23C99/00 , F23D14/70 , F23D14/84 , F23D23/00
Abstract: A perforated flame holder and burner including a perforated flame holder provides reduced oxides of nitrogen (NOx) during operation. The perforated flame holder includes a pattern of elongated apertures extending between a proximal and a distal surface of the flame holder relative to a fuel nozzle. The perforated flame holder can provide a significantly reduced flame height while maintaining heat output from the burner.
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公开(公告)号：US10578301B2
公开(公告)日：2020-03-03
申请号：US15663458
申请日：2017-07-28
Applicant: CLEARSIGN TECHNOLOGIES CORPORATION
Inventor： Douglas W. Karkow , Joseph Colannino , James K. Dansie , Jesse Dumas , Donald Kendrick , Christopher A. Wiklof
Abstract: A combustion system includes a perforated flame holder, an oxidant source, and an adjustable fuel nozzle. The oxidant source outputs oxidant. The adjustable fuel nozzle outputs fuel onto the perforated flame holder. The perforated flame holder supports a combustion reaction of the fuel and oxidant within the perforated flame holder. The position of the adjustable nozzle relative to the perforated flame holder can be adjusted to achieve selected characteristics of the combustion reaction within the perforated flame holder.
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公开(公告)号：US11953201B2
公开(公告)日：2024-04-09
申请号：US16746743
申请日：2020-01-17
Applicant: ClearSign Technologies Corporation
Inventor： Douglas W. Karkow , Donald Kendrick , James K. Dansie , Christopher A. Wiklof
CPC classification number: F23D14/825 , F23D14/22 , F23D14/32 , F23D14/58 , F23N5/242 , F23N5/006 , F23R3/18
Abstract: A combustion system includes a distal flame holder, a pilot fuel distributor, a main fuel distributor, an oxidant source, an array of sensors, and a controller. The oxidant source outputs an oxidant. The pilot fuel distributor supports a pilot flame configured to preheat the distal flame holder by outputting a pilot fuel at least when the combustion system is in a preheating state. The main fuel source outputs a main fuel in the standard operating state. The distal flame holder is configured to support a combustion reaction of the main fuel and the oxidant in the standard operating state. The sensors are configured to sense parameters of the pilot flame and the distal flame holder and to output sensor signals to the controller. The controller executes software instructions that include adjusting the flow of the main fuel, the pilot fuel, and the oxidant responsive to the sensor signals.
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公开(公告)号：US11073280B2
公开(公告)日：2021-07-27
申请号：US16296623
申请日：2019-03-08
Applicant: CLEARSIGN TECHNOLOGIES CORPORATION
Inventor： Christopher A. Wiklof
Abstract: A burner system and a retrofit flame control system for an existing burner system are disclosed. The burner system may include burner components, electrodynamic components, and a data interface. The data interface may receive a command for controlling the burner components and prepare a command for controlling the electrodynamic components at least partially based on the command for controlling the burner components.
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公开(公告)号：US20210190310A9
公开(公告)日：2021-06-24
申请号：US16777826
申请日：2020-01-30
Applicant: ClearSign Technologies Corporation
Inventor： Colin James Deller , Donald Kendrick , Venkatesh Iyer , Douglas W. Karkow
IPC: F23C9/08 , F23D14/04 , F23D14/64 , F23D14/82 , F23Q9/00 , F23D14/26 , F23D14/14 , F23C6/04 , F23K5/00 , F23L7/00
Abstract: A burner includes a distal flame holder, first and second fuel nozzles, a fuel and oxidant source, and a mixing tube disposed upstream from the distal flame holder. Fuel emitted from the first fuel nozzle mixes with oxidant from the oxidant source to form a fuel and oxidant mixture to support combustion in the distal flame holder. A non-reactive fluid source such as recirculated flue gas provides a non-reactive fluid for dilution of the fuel and oxidant mixture to prevent flashback.
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