公开(公告)号：US10119704B2

公开(公告)日：2018-11-06

申请号：US15236862

申请日：2016-08-15

Applicant: CLEARSIGN COMBUSTION 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：US10088154B2

公开(公告)日：2018-10-02

申请号：US15235479

申请日：2016-08-12

Applicant: CLEARSIGN COMBUSTION CORPORATION

Inventor： Joseph Colannino ,  Douglas W. Karkow ,  Igor A. Krichtafovitch ,  Christopher A. Wiklof

IPC: B01J8/06 ,  F23D14/26 ,  F23C99/00 ,  F23D11/40 ,  F23D14/30 ,  F23D14/70 ,  C01B3/38 ,  C01B3/48

Abstract: A down-fired flame burner includes a flame holder positioned below the burner. The flame holder includes a plurality of perforations that collectively confine a combustion reaction of the burner to the flame holder.

公开(公告)号：US10077899B2

公开(公告)日：2018-09-18

申请号：US14763738

申请日：2014-02-14

Applicant: ClearSign Combustion Corporation

Inventor： Douglas W. Karkow ,  Joseph Colannino ,  Igor A. Krichtafovitch ,  Christopher A. Wiklof

IPC: F23L7/00 ,  F23C99/00 ,  F23N5/26 ,  F27D11/06 ,  F23D14/24 ,  F23D14/84 ,  F23N5/00 ,  F23N1/00 ,  F23D14/02 ,  F23D14/74 ,  F23D14/14 ,  F23D11/44 ,  F23D11/02 ,  F23D11/38 ,  F23D11/40 ,  F23C6/04 ,  F23C9/06 ,  F23D14/26 ,  F23N1/02 ,  F23D11/42

CPC classification number: F23C99/001 ,  F23C6/042 ,  F23C9/06 ,  F23C2201/00 ,  F23C2900/00 ,  F23D11/02 ,  F23D11/38 ,  F23D11/383 ,  F23D11/406 ,  F23D11/42 ,  F23D11/446 ,  F23D11/448 ,  F23D14/02 ,  F23D14/14 ,  F23D14/145 ,  F23D14/24 ,  F23D14/26 ,  F23D14/74 ,  F23D14/84 ,  F23D2203/1012 ,  F23D2203/102 ,  F23D2203/1023 ,  F23D2203/104 ,  F23D2203/105 ,  F23D2207/00 ,  F23D2208/10 ,  F23L7/007 ,  F23N1/00 ,  F23N1/002 ,  F23N1/02 ,  F23N5/00 ,  F23N5/10 ,  F23N5/265 ,  F23N2021/00 ,  F23N2027/22 ,  F23N2900/00 ,  F27D11/06 ,  Y02T50/677

Abstract: According to an embodiment, a combustion system is provided, which includes a nozzle configured to emit a diverging fuel flow, a flame holder positioned in the path of the fuel flow and that includes a plurality of apertures extending therethrough, and a preheat mechanism configured to heat the flame to a temperature exceeding a startup temperature threshold.

公开(公告)号：US10066833B2

公开(公告)日：2018-09-04

申请号：US15023039

申请日：2014-09-23

Applicant: ClearSign Combustion Corporation

Inventor： Joseph Colannino ,  Doug W. Karkow ,  Christopher A. Wiklof

IPC: F23C5/08 ,  F23D23/00 ,  F22B7/08 ,  F23D14/16 ,  F23D11/40 ,  F23N5/02 ,  F01K5/02 ,  F23D11/02 ,  F22B1/18 ,  F23D99/00

Abstract: A burner system includes a plurality of burners, each having a nozzle positioned to emit a stream of fuel into a combustion volume, and a perforated flame holder, including a plurality of apertures extending between first and second faces thereof, and positioned to receive a stream of fuel from the respective nozzle. In operation, the flame holders are configured to hold a flame substantially within the plurality of apertures.

公开(公告)号：US20180038589A1

公开(公告)日：2018-02-08

申请号：US15521011

申请日：2015-12-23

Applicant: CLEARSIGN COMBUSTION CORPORATION

Inventor： Douglas Wayne KARKOW ,  Robert E. BREIDENTHAL ,  Christopher A. WIKLOF ,  Donald KENDRICK

IPC: F23D14/16

CPC classification number: F23D14/16 ,  F23D14/14 ,  F23D14/58 ,  F23D14/82

Abstract: Embodiments disclosed herein include flame holders that may provide recirculated fuel flow therethrough, combustion systems that include such flame holders, and related methods. A fuel and/or fuel-oxidant mixture may pass through one or more openings in the flame holder and, after combustion, the resulting flame may be held at or near a surface of the flame holder including in the one or more openings. Generally, the configuration of the flame holders disclosed herein (e.g., the one or more openings of the flame holders) may recirculate or regulate (e.g., decrease and/or increase) the flow of fuel and/or oxidant therethrough, at least limit flame flashback, improve fuel/oxidant mixing, increase flame stability, regulate where the flame is located in the flame holder, improve the operational stability window of the combustion system, or combinations of the foregoing.

公开(公告)号：US20180023807A1

公开(公告)日：2018-01-25

申请号：US15549966

申请日：2016-02-16

Applicant: CLEARSIGN COMBUSTION CORPORATION

Inventor： Douglas Wayne KARKOW ,  Joseph COLANNINO ,  Christopher A. WIKLOF

IPC: F23D11/40 ,  F23D14/26

CPC classification number: F23D11/406 ,  F23D14/26

Abstract: Embodiments disclosed herein are directed to methods of upgrading a conventional combustion system into an upgraded combustion system that includes a perforated flame holder. For example, the perforated flame holder may improve operational efficiency of the combustion system and/or reduce pollutants such as NOx output by the upgraded combustion system.

公开(公告)号：US20180017249A1

公开(公告)日：2018-01-18

申请号：US15663458

申请日：2017-07-28

Applicant: CLEARSIGN COMBUSTION CORPORATION

Inventor： DOUGLAS W. KARKOW ,  JOSEPH COLANNINO ,  JAMES K. DANSIE ,  JESSE DUMAS ,  DONALD KENDRICK ,  CHRISTOPHER A. WIKLOF

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

CPC classification number: F23D11/443 ,  F23D9/00 ,  F23D11/38 ,  F23D14/14 ,  F23D14/26 ,  F23D14/72 ,  F23N5/025 ,  F23N5/245

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.

公开(公告)号：US20170307212A1

公开(公告)日：2017-10-26

申请号：US15498124

申请日：2017-04-26

Applicant: CLEARSIGN COMBUSTION CORPORATION

Inventor： DONALD KENDRICK

IPC: F23D14/02 ,  F23D14/60 ,  F23N5/20 ,  F23D14/14 ,  F23N5/12 ,  F23D14/58

CPC classification number: F23D14/02 ,  F23D14/14 ,  F23D14/16 ,  F23D14/58 ,  F23D14/60 ,  F23N5/123 ,  F23N5/203 ,  F23N2021/00 ,  F23N2027/10

Abstract: A fuel nozzle assembly includes one or more tapered fuel nozzles. Each tapered fuel nozzle includes an acute trailing edge or tip at a top portion of the fuel nozzle. One or more fuel orifices are arranged proximate the acute trailing edge or tip. A tapered fuel nozzle having a toroidal airfoil structure includes a fuel channel to distribute a fuel to the fuel orifice(s). The fuel nozzle assembly may be provided as part of a burner system, including a perforated flame holder, and associated method, in which the fuel nozzle assembly is oriented to direct fuel form the fuel orifices toward the perforated flame holder.

公开(公告)号：US20170268772A1

公开(公告)日：2017-09-21

申请号：US15455469

申请日：2017-03-10

Applicant: ClearSign Combustion Corporation

Inventor： Jerry Michael Lang, SR. ,  Douglas Wayne Karkow ,  Donald Kendrick ,  James Kyle Dansie ,  Terry Lynn Montgomery ,  Jesse Dumas ,  Christopher A. Wiklof

IPC: F23D14/70 ,  F27B1/10

CPC classification number: F23D14/70 ,  F27B1/10 ,  F27D2201/00

Abstract: Embodiments disclosed herein are directed to integrated combustion assemblies including a perforated flame holder, combustion systems that include one or more integrated combustion assemblies, and related methods. For example, an integrated combustion assembly may be placed into service (e.g., integrated into a combustion system) as a complete and/or replaceable unit, such that elements and/or components of the combustion assembly are preassembled and no further assembly is required at the installation site.

公开(公告)号：US20170191655A1

公开(公告)日：2017-07-06

申请号：US15344628

申请日：2016-11-07

Applicant: ClearSign Combustion Corporation

Inventor： JOSEPH COLANNINO ,  DOUGLAS W. KARKOW ,  CHRISTOPHER A. WIKLOF

IPC: F23D14/14 ,  F23D14/02

CPC classification number: F23D14/14 ,  F23D14/02 ,  F23D2203/102 ,  F23D2203/1026 ,  F23D2203/106

Abstract: A flame holder assembly includes a flame holder element and a flame shield element. The flame holder element has a first plurality of apertures extending through the flame holder element. The flame shield element has a second plurality of apertures extending through the flame shield element. Each of the second plurality of apertures has a lateral dimension that is no greater than a flame quenching distance. The flame shield element is positioned facing the flame holder element, and the flame holder assembly is configured such that fuel is supplied to the flame holder element via the second plurality of apertures of the flame shield element.