公开(公告)号：US11248786B2

公开(公告)日：2022-02-15

申请号：US16728548

申请日：2019-12-27

Applicant: CLEARSIGN TECHNOLOGIES CORPORATION

Inventor： Douglas W. Karkow ,  Joseph Colannino ,  James K. Dansie ,  Jesse Dumas ,  Donald Kendrick ,  Christopher A. Wiklof

IPC: F23D11/44 ,  F23N5/24 ,  F23N5/02 ,  F23D14/14 ,  F23D14/72 ,  F23D14/26 ,  F23D9/00 ,  F23D11/38

Abstract: A method for a combustion system includes outputting fuel from an adjustable-position fuel nozzle onto a perforated flame holder, the fuel being directed for mixture with an oxidant en route to the perforated flame holder. A combustion reaction of the fuel and the oxidant is supported within the perforated flame holder. A position of the adjustable-position fuel nozzle may be changed relative to the flame holder. A first flow of fuel may be output when the adjustable position fuel nozzle is in an extended state, and a second flow of fuel may be output when the adjustable-position fuel nozzle is in a retracted state.

公开(公告)号：US12066248B2

公开(公告)日：2024-08-20

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

IPC: F27B17/00 ,  F23C5/08 ,  F23D11/40 ,  F23D14/14 ,  F23D14/70 ,  F23D14/72 ,  F23Q9/00 ,  F27D1/00

CPC classification number: F27B17/0016 ,  F23C5/08 ,  F23D11/406 ,  F23D14/145 ,  F23D14/70 ,  F23D14/72 ,  F23C2900/05081 ,  F23Q9/00 ,  F27D2001/0059

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.

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

IPC: F23D14/82 ,  F23D14/22 ,  F23D14/32 ,  F23D14/58 ,  F23N5/00 ,  F23N5/24 ,  F23R3/18

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.

公开(公告)号：US11953199B2

公开(公告)日：2024-04-09

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

IPC: F23D11/40 ,  F23D14/14 ,  F23D14/70 ,  F23M9/06

CPC classification number: F23D11/406 ,  F23D14/14 ,  F23D14/145 ,  F23D14/70 ,  F23M9/06 ,  F23C2203/10 ,  F23C2203/20 ,  F23D2203/102 ,  F23D2203/104 ,  Y02E20/30

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.

公开(公告)号：US10823401B2

公开(公告)日：2020-11-03

申请号：US16137339

申请日：2018-09-20

Applicant: CLEARSIGN TECHNOLOGIES CORPORATION

Inventor： Joseph Colannino ,  Douglas W. Karkow ,  James K. Dansie ,  Christopher A. Wiklof

IPC: F23D14/14

Abstract: A combustion system such as a furnace or boiler includes a non-planar perforated flame holder configured to hold a combustion reaction.

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

IPC: F23D14/14 ,  F23C3/00 ,  F23C6/02 ,  F23C99/00

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.

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

IPC: F23D11/44 ,  F23D9/00 ,  F23D11/38

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.