EP4194751A1 - Dunkelstrahler - Google Patents

Dunkelstrahler Download PDF

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Publication number
EP4194751A1
EP4194751A1 EP21213778.0A EP21213778A EP4194751A1 EP 4194751 A1 EP4194751 A1 EP 4194751A1 EP 21213778 A EP21213778 A EP 21213778A EP 4194751 A1 EP4194751 A1 EP 4194751A1
Authority
EP
European Patent Office
Prior art keywords
burner
combustion air
hydrogen
tube
dark radiator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP21213778.0A
Other languages
German (de)
English (en)
French (fr)
Inventor
Edgar Kreis
Alexander GENZEL
Torsten Stohler
Thomas Renner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schwank GmbH
Original Assignee
Schwank GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schwank GmbH filed Critical Schwank GmbH
Priority to EP21213778.0A priority Critical patent/EP4194751A1/de
Priority to PCT/EP2022/084654 priority patent/WO2023104823A1/de
Priority to CA3216912A priority patent/CA3216912A1/en
Priority to CN202280019594.3A priority patent/CN117015681A/zh
Priority to KR1020237029587A priority patent/KR20240118003A/ko
Priority to US18/279,950 priority patent/US20240142101A1/en
Priority to DE112022003598.6T priority patent/DE112022003598A5/de
Publication of EP4194751A1 publication Critical patent/EP4194751A1/de
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/12—Radiant burners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C3/00—Combustion apparatus characterised by the shape of the combustion chamber
    • F23C3/002—Combustion apparatus characterised by the shape of the combustion chamber the chamber having an elongated tubular form, e.g. for a radiant tube
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
    • F23C9/08—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber for reducing temperature in combustion chamber, e.g. for protecting walls of combustion chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C2900/00—Special features of, or arrangements for combustion apparatus using fluid fuels or solid fuels suspended in air; Combustion processes therefor
    • F23C2900/9901—Combustion process using hydrogen, hydrogen peroxide water or brown gas as fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2203/00—Gaseous fuel burners
    • F23D2203/002—Radiant burner mixing tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2203/00—Gaseous fuel burners
    • F23D2203/007—Mixing tubes, air supply regulation

Definitions

  • a dark radiator which has an efficiency that is at least the same as in the prior art and in which the emission of pollutants is reduced. Due to the fact that the fuel gas supply is preferably connected exclusively to a hydrogen source, the exhaust gas theoretically does not contain any carbon-containing pollutants such as carbon monoxide, carbon dioxide or hydrocarbons, since hydrogen does not contain any carbon.
  • the blower is connected to an ejector whose suction port is connected to the hydrogen supply, with the combustion air sucked in by the blower serving as the driving medium, so that a mixture of hydrogen and combustion air is supplied to the burner by the blower.
  • This enables the supply of a hydrogen/combustion air mixture in a defined mixing ratio, whereby the flame temperature can be adjusted.
  • the flame temperature can be reduced. Due to the high reactivity of hydrogen, a high air ratio of 2.5 to 3 is possible. In this way, the flame temperature can be brought below the limit temperatures of nitrogen oxide formation and also of the materials of the radiant tube.
  • the burner comprises a gas nozzle and a mixing tube, which is fed with hydrogen from the gas nozzle, the mixing tube being flushed with combustion air by the blower, the gas nozzle forming an ejector with the mixing tube, the driving medium of the ejector hydrogen introduced through the gas nozzle and the medium sucked into the mixing tube is combustion air located in the jet tube and an ignition device for igniting the hydrogen-combustion air mixture is connected downstream in the flame direction at a distance from the mixing tube.
  • a non-return lock is preferably arranged in the mixing tube at its end directed in the direction of the flame. This prevents flashback into the mixing tube.
  • the burner comprises a gas nozzle, the blower being set up for flushing the gas nozzle with combustion air and no combustion gas mixing chamber for premixing combustion gas and combustion air being arranged and the gas nozzle being fed exclusively with combustion gas.
  • the blower being set up for flushing the gas nozzle with combustion air and no combustion gas mixing chamber for premixing combustion gas and combustion air being arranged and the gas nozzle being fed exclusively with combustion gas.
  • a combustion air mixing chamber is arranged upstream of the burner in the flame direction and is connected to a combustion air source and the exhaust gas discharge line.
  • the fan is arranged upstream of the burner in the flame direction and the combustion air mixing chamber is arranged inside the fan. This achieves good mixing of combustion air and exhaust gas within the fan.
  • the burner serves as a primary burner, which is followed by a secondary burner at a distance in the flame direction in the radiant tube, the fuel gas supply of which has a hydrogen source as the fuel gas source is connected, the secondary burner of the exhaust gas stream of the upstream primary burner is supplied as combustion air.
  • This achieves after-treatment of the exhaust gas from the primary burner, as a result of which emissions of nitrogen oxides are largely minimized. It has been shown that due to the high reactivity of the hydrogen, the remaining oxygen content in the exhaust gas from the primary burner is readily sufficient for the combustion of the hydrogen from the secondary burner.
  • the combustion process in the secondary burner is favored by the temperature of the exhaust gas flow from the primary burner.
  • a compensating element in the form of a compensator is interposed between the primary burner and the secondary burner to compensate for thermally induced changes in length within the radiant tube.
  • This compensator which is preferably designed as an axial compensator, absorbs the movement of the jet pipe along the axis, thereby avoiding damage to the jet pipe.
  • the dark radiator selected as an exemplary embodiment according to figure 1 comprises a burner 1, which is connected to a blower 2 and to which a jet pipe 3 is connected.
  • the jet pipe 3 is in figure 1 merely implied; the jet pipe 3 can certainly extend over a few meters in length and be formed from several jet pipe elements.
  • the jet tube 3 is designed as a highly heat-resistant stainless steel tube. Alternatively, special steels with a thermally applied aluminum oxide layer can also be used.
  • the radiant tube 3 is surrounded by a reflector (not shown), which in the exemplary embodiment is made of surface-structured aluminum sheet and has partition plates on both sides to reduce convective losses.
  • a burner 4 is arranged, which in turn is connected to a blower 2 and to which a jet pipe 3 is connected.
  • the burner 4 includes a hydrogen nozzle 41 which is connected to a hydrogen supply 42 and which in turn is aligned with the longitudinal central axis of the jet tube 3 .
  • a gas nozzle that is exclusively charged with hydrogen is referred to here as a hydrogen nozzle.
  • the hydrogen nozzle protrudes into a mixing tube 43 which runs coaxially with the jet tube 3, with a radial suction gap between the mixing tube 43 and the hydrogen nozzle 41 is formed by the hydrogen nozzle 41 and the mixing tube 43 formed ejector.
  • the blower 2 is aligned in such a way that combustion air 35 flows around the hydrogen nozzle 41 and the mixing tube 43 .
  • Combustion air 25, which mixes with the hydrogen is sucked in via the suction gap 44 by the hydrogen flow introduced into the mixing tube 43 via the hydrogen nozzle 41.
  • the hydrogen/combustion air mixture emerging from the mixing tube 43 is ignited by the ignition electrode 46 arranged at a distance from the mixing tube 43, as a result of which a flame is formed which extends into the jet tube 3 over the length thereof.
  • a portion of the combustion air 35 blown into the burner 1 by the blower 2 flows through the scavenging openings of the partitions 45 and washes around the flame extending into the radiant tube 3, which is thereby cooled.
  • the ejector formed by the hydrogen nozzle 41 and the mixing tube 43 is designed in such a way that combustion air with an air ratio of 2.5 is supplied to the hydrogen in the mixing tube, whereby a flame temperature of approximately 900° C. is achieved.
  • two burners are arranged in the radiant tube 3, a primary burner 7 and a secondary burner 8 downstream of this in the direction of the flame.
  • the primary burner 7 and the secondary burner 8 correspond to the burner 5 explained in the exemplary embodiment described above a hydrogen supply 72, 82, with an ignition electrode 73, 83 being positioned at a distance from the hydrogen nozzle 71, 81.
  • the primary burner 7 is connected to a fan 2 whose suction port is connected to a combustion air supply 22 .
  • the primary burner 7 is followed by a U-shaped jet tube 3 which is connected to the secondary burner 8 via a compensating element 31 .
  • the secondary burner 8 is in turn followed by a further jet tube 3 ′, which in the exemplary embodiment is again U-shaped.
  • the compensating element 31 positioned in the section of the radiant tube 3 exposed to a high temperature gradient by the secondary burner 8 serves to compensate for thermally induced changes in length within the radiant tube.
  • this is designed as an axial compensator, which absorbs the movements of the pipeline along the axis.
  • the primary burner 7' corresponding to the burner of the embodiment according to FIG figure 2 formed, wherein the hydrogen nozzle 71 in turn protrudes into a mixing tube 74, so that between hydrogen nozzle 71 and mixing tube 74 a suction gap 75 is formed.
  • a non-return lock 741 is in turn arranged in the mixing tube 74 at its end opposite the hydrogen nozzle 71 .
  • the structure of the dark radiator of this exemplary embodiment corresponds to the dark radiator of the exemplary embodiment according to FIG figure 4 .
  • the embodiments given there for the admixture of part of the exhaust gas flow of the second radiant tube 3 'to the combustion air sucked in by the fan 2 are possible.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
  • Pre-Mixing And Non-Premixing Gas Burner (AREA)
EP21213778.0A 2021-12-10 2021-12-10 Dunkelstrahler Pending EP4194751A1 (de)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP21213778.0A EP4194751A1 (de) 2021-12-10 2021-12-10 Dunkelstrahler
PCT/EP2022/084654 WO2023104823A1 (de) 2021-12-10 2022-12-06 Dunkelstrahler
CA3216912A CA3216912A1 (en) 2021-12-10 2022-12-06 Dark radiator
CN202280019594.3A CN117015681A (zh) 2021-12-10 2022-12-06 暗辐射器
KR1020237029587A KR20240118003A (ko) 2021-12-10 2022-12-06 다크 라디에이터
US18/279,950 US20240142101A1 (en) 2021-12-10 2022-12-06 Dark radiator
DE112022003598.6T DE112022003598A5 (de) 2021-12-10 2022-12-06 Dunkelstrahler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP21213778.0A EP4194751A1 (de) 2021-12-10 2021-12-10 Dunkelstrahler

Publications (1)

Publication Number Publication Date
EP4194751A1 true EP4194751A1 (de) 2023-06-14

Family

ID=78829661

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21213778.0A Pending EP4194751A1 (de) 2021-12-10 2021-12-10 Dunkelstrahler

Country Status (7)

Country Link
US (1) US20240142101A1 (zh)
EP (1) EP4194751A1 (zh)
KR (1) KR20240118003A (zh)
CN (1) CN117015681A (zh)
CA (1) CA3216912A1 (zh)
DE (1) DE112022003598A5 (zh)
WO (1) WO2023104823A1 (zh)

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1064671B (de) * 1957-02-25 1959-09-03 Hauck Mfg Company Gasbrenner zum Einsetzen in ein Heizrohr
DE9207435U1 (de) * 1991-06-06 1992-08-13 Schulte-Heiztechnik GmbH, 4353 Oer-Erkenschwick Gasbeheizte Strahlungsheizung
US5271729A (en) * 1991-11-21 1993-12-21 Selas Corporation Of America Inspirated staged combustion burner
US20040115575A1 (en) * 2002-12-16 2004-06-17 Toshihiro Kayahara Combustion method and apparatus for NOx reduction
US20050247300A1 (en) * 2004-05-06 2005-11-10 Eclipse, Inc. Apparatus for radiant tube exhaust gas entrainment
US20120183914A1 (en) * 2006-06-14 2012-07-19 John Zink Company, Llc Coanda gas burner apparatus and methods
EP2708814A1 (de) 2012-09-18 2014-03-19 GoGaS Goch GmbH & Co. KG Dunkelstrahler
DE102014019765A1 (de) 2014-05-05 2016-01-14 Schwank Gmbh Dunkelstrahler
US20180038588A1 (en) * 2015-02-18 2018-02-08 Clearsign Combustion Corporation Burner and support structure with a perforated flame holder
DE102014019766A1 (de) 2014-05-05 2018-08-09 Schwank Gmbh Infrarotstrahler

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1064671B (de) * 1957-02-25 1959-09-03 Hauck Mfg Company Gasbrenner zum Einsetzen in ein Heizrohr
DE9207435U1 (de) * 1991-06-06 1992-08-13 Schulte-Heiztechnik GmbH, 4353 Oer-Erkenschwick Gasbeheizte Strahlungsheizung
US5271729A (en) * 1991-11-21 1993-12-21 Selas Corporation Of America Inspirated staged combustion burner
US20040115575A1 (en) * 2002-12-16 2004-06-17 Toshihiro Kayahara Combustion method and apparatus for NOx reduction
US20050247300A1 (en) * 2004-05-06 2005-11-10 Eclipse, Inc. Apparatus for radiant tube exhaust gas entrainment
US20120183914A1 (en) * 2006-06-14 2012-07-19 John Zink Company, Llc Coanda gas burner apparatus and methods
EP2708814A1 (de) 2012-09-18 2014-03-19 GoGaS Goch GmbH & Co. KG Dunkelstrahler
DE102014019765A1 (de) 2014-05-05 2016-01-14 Schwank Gmbh Dunkelstrahler
DE102014019766A1 (de) 2014-05-05 2018-08-09 Schwank Gmbh Infrarotstrahler
US20180038588A1 (en) * 2015-02-18 2018-02-08 Clearsign Combustion Corporation Burner and support structure with a perforated flame holder

Also Published As

Publication number Publication date
US20240142101A1 (en) 2024-05-02
CA3216912A1 (en) 2023-06-15
DE112022003598A5 (de) 2024-05-16
KR20240118003A (ko) 2024-08-02
CN117015681A (zh) 2023-11-07
WO2023104823A1 (de) 2023-06-15

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