EP0578131A1 - Chauffe-eau avec brûleur catalytiques - Google Patents

Chauffe-eau avec brûleur catalytiques Download PDF

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Publication number
EP0578131A1
EP0578131A1 EP93110501A EP93110501A EP0578131A1 EP 0578131 A1 EP0578131 A1 EP 0578131A1 EP 93110501 A EP93110501 A EP 93110501A EP 93110501 A EP93110501 A EP 93110501A EP 0578131 A1 EP0578131 A1 EP 0578131A1
Authority
EP
European Patent Office
Prior art keywords
burner
catalytic
combustion
water heater
gas
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.)
Ceased
Application number
EP93110501A
Other languages
German (de)
English (en)
Inventor
Hartmut Dipl.-Ing. Assmann
Achim Dipl.-Ing. Busch
Hans-Joachim Dipl.-Ing. Faust
Rainer Dipl.-Ing. Jakob
Heinrich Dipl.-Ing. Oehlen
Chaled Dr.-Ing. Shaker
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.)
Bosch Thermotechnik GmbH
Original Assignee
Buderus Heiztechnik 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
Priority claimed from DE4222711A external-priority patent/DE4222711C2/de
Priority claimed from DE4308017A external-priority patent/DE4308017C1/de
Application filed by Buderus Heiztechnik GmbH filed Critical Buderus Heiztechnik GmbH
Publication of EP0578131A1 publication Critical patent/EP0578131A1/fr
Ceased 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
    • F23D14/18—Radiant burners using catalysis for flameless combustion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/0027—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters using fluid fuel
    • F24H1/0045—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters using fluid fuel with catalytic combustion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/46—Water heaters having plural combustion chambers

Definitions

  • the invention relates to a water heater according to the preamble of claim 1.
  • a water heater of this type can be found in DE-PS 251 567.
  • catalytic burners in a water space, which enable flameless combustion on a catalyst layer. The combustion takes place in such burners at relatively low temperatures between 800 and 1000 ° C, at which NO x formation does not occur.
  • the burners described in this document consist of porous burner tubes coated on the outside with the catalytic mass, through which the fuel gas is forced from the inside to the outside. On the surface it connects with the combustion air flowing past and then burns flameless if the ignition temperature is exceeded.
  • the burner itself serves as a preheating device in which the fuel gas flowing through is first burned with an open flame.
  • the unpublished P 42 22 711.9-13 also describes a catalytic burner with a preheating device that is operated with the fuel gases themselves.
  • the catalytic burner is designed as a slit burner between a hollow body and the water jacket.
  • the preheater consists of a gas burner located at the inlet end of the catalytic burner. Its combustion gases flow through the interior Hollow body until it has reached the sufficient operating temperature of around 300 - 350 ° C. Then the supply of the fuel gas-air mixture is switched to the catalytic burner.
  • the invention has for its object to provide a water heater with a catalytic burner, in which there is an effective preheating and can respond flexibly to different performance requirements.
  • the water heater according to the invention has the features mentioned in the characterizing part of claim 1.
  • the catalytic burner is preheated by a gas burner arranged at the inlet end of the burner or by a premix burner arranged in the burner itself, which transfers its heat to the catalytic burner area via a heat exchanger wall.
  • the temporal series connection of the preheating burner and the catalytic burner known from DE-PS 251 567 could not completely rule out flame formation during the catalytic operating phase because the combustion took place on the same side in both cases. According to the invention, however, the two areas are deliberately separated by a heat exchanger wall.
  • the use of a premix burner not only leads to optimal combustion with low, environmentally harmful emissions, but also ensures that the desired operating temperatures of the catalytic burner are achieved very quickly.
  • the premix burner acts directly on the hollow body of the burner which serves as the combustion chamber and thereby brings it to temperature in the shortest possible time.
  • the gas burner or the premix burner can only be used in the known manner for preheating the catalytic burner. For this purpose, it can be automatically shut off from the supply of the fuel gas-air mixture via a changeover valve when the required operating temperature of about 300 to 350 ° C. has been reached on the catalyst layer.
  • a particular advantage, however, is to operate the premix burner together with the catalytic burner when there is an increased power requirement.
  • the catalytic burner can cover the basic heat requirement, for example of a low-energy house.
  • the premix burner is switched on.
  • the premix burner has a dual function in this case. It is used to start the catalytic burner and, if necessary, to cover a peak load.
  • the catalytic burner it is advisable to operate in a modulating manner. For example, between 6 and 12 kW, it could continuously cover the basic heating requirements of a house. In the case of a domestic water withdrawal, the premix burner can then be switched on, for example with 13 kW, and the catalytic burner can also be operated in a modulating manner in this higher power range. The entire performance range up to a peak load is continuously covered in this way. In the practical version, it is advisable to design the burner to form a combustion gap from tubes that are joined together. In the case of a premix burner as a preheating device, the inner tube serves as the combustion chamber of the premix burner. In order to achieve a certain pressure equalization, it is advisable to manufacture this tube from porous material.
  • a distribution chamber for the fuel gas-air mixture leading to the combustion gap of the catalytic burner and below this the combustion chamber of the gas burner are arranged below the water chamber.
  • the fuel gas-air mixture enters the distribution chamber and from there into the gap or the column of the catalytic burner.
  • the mixture can be fed to the combustion chamber of the gas burner via an upstream changeover valve. Here it ignites and burns with a visible flame.
  • the resulting heating gases heat up the partition, which is also the carrier of the catalyst layer.
  • the inner tube of the burner serves as a heating gas flue for the heating gases of the gas burner.
  • a water chamber 1 is penetrated by several burners 2 made of pipes 3, 4 arranged concentrically one inside the other.
  • a combustion gap 5 is formed between the tubes 3, 4, in which the fuel gas-air mixture flowing through burns catalytically at temperatures between 800 and 1000 ° C. without flames.
  • a catalyst layer is preferably applied to the inner tube 3.
  • the heat transfer to the surrounding water in the water space 1 takes place through the outer tube 4. 1 and 2, the combustion chamber 7 of a gas burner 8 with a distribution grid 9, an ignition electrode 10 and a flame monitor 11 is arranged below the distribution chamber 6 of the slit burner 2 for starting the reaction at approximately 300.degree.
  • the gas burner 8 is fed with the fuel gas / air mixture through a supply line 12 after switching over a valve 13.
  • the resulting heating gases flow through the inner tube 3 and heat it up.
  • This tube 3 forms the heat exchanger wall towards the catalytic burner area. As soon as the reaction temperature is reached, the gas burner 8 is switched off.
  • a cylindrical or flat premix burner 14 or 15 is arranged in the inner tube 3 of the slit burner 2.
  • the interior of the tube 3 forms the combustion chamber of the premix burner and at the same time the heat exchanger wall to the catalytic burner area in the combustion gap 5 between the two tubes 3 and 4.
  • the valve 13 makes it possible to only use the premix burner 14 or 15 or only the gap burner 2 and, if required, also to operate both burners 14 or 15 or 2.
  • a downstream monolithic burner 16 ensures catalytic afterburning. So that the combustion gases of the premix burner 14 do not accumulate in the front zone, it is advisable to manufacture the inner tube 3 from porous material. There is a pressure equalization via the flow channel of the slit burner 2.
EP93110501A 1992-07-10 1993-07-01 Chauffe-eau avec brûleur catalytiques Ceased EP0578131A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE4222711 1992-07-10
DE4222711A DE4222711C2 (de) 1992-07-10 1992-07-10 Warmwasserbereiter mit mindestens einem, einen Wasserraum durchdringenden, katalytischen Brenner
DE4308017 1993-03-13
DE4308017A DE4308017C1 (de) 1993-03-13 1993-03-13 Wassererwärmer mit katalytischem Brenner und Verfahren zu seinem Betreiben

Publications (1)

Publication Number Publication Date
EP0578131A1 true EP0578131A1 (fr) 1994-01-12

Family

ID=25916476

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93110501A Ceased EP0578131A1 (fr) 1992-07-10 1993-07-01 Chauffe-eau avec brûleur catalytiques

Country Status (2)

Country Link
EP (1) EP0578131A1 (fr)
CZ (1) CZ279359B6 (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4408186C1 (de) * 1994-01-27 1995-01-26 Buderus Heiztechnik Gmbh Katalytischer Brenner
AT402100B (de) * 1995-01-23 1997-01-27 Vaillant Gmbh Heizgerät mit einem katalytisch beschichteten brenner
AT402660B (de) * 1994-07-25 1997-07-25 Vaillant Gmbh Heizgerät heizgerät
DE19527767B4 (de) * 1994-07-25 2005-08-25 Vaillant Gmbh Heizgerät
WO2008095255A1 (fr) * 2007-02-09 2008-08-14 Joregensen, Patrick, Clifford Procédé et dispositif pour des applications de combustion haute température
CN100443820C (zh) * 2005-12-24 2008-12-17 中国科学技术大学 采用稀薄－无焰燃烧方式的燃气或燃油锅炉
WO2017193479A1 (fr) * 2016-05-13 2017-11-16 芜湖美的厨卫电器制造有限公司 Chauffe-eau à gaz
CN109425097A (zh) * 2017-08-31 2019-03-05 芜湖美的厨卫电器制造有限公司 一种燃气热水器
CN110887234A (zh) * 2018-09-07 2020-03-17 芜湖美的厨卫电器制造有限公司 燃烧器组件及热水器
CN112303894A (zh) * 2019-07-30 2021-02-02 芜湖美的厨卫电器制造有限公司 燃气热水器和燃气热水器的控制方法
CN113983681A (zh) * 2016-09-30 2022-01-28 芜湖美的厨卫电器制造有限公司 燃气热水器
CN114061151A (zh) * 2020-07-27 2022-02-18 芜湖美的厨卫电器制造有限公司 燃烧器组件和燃气热水器

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1401165A1 (de) * 1959-07-30 1968-10-03 Universal Oil Prod Co Katalytischer Strahlungserhitzer
EP0119279A1 (fr) * 1983-03-11 1984-09-26 Matsushita Electric Industrial Co., Ltd. Dispositif de combustion catalytique

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1401165A1 (de) * 1959-07-30 1968-10-03 Universal Oil Prod Co Katalytischer Strahlungserhitzer
EP0119279A1 (fr) * 1983-03-11 1984-09-26 Matsushita Electric Industrial Co., Ltd. Dispositif de combustion catalytique

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4408186C1 (de) * 1994-01-27 1995-01-26 Buderus Heiztechnik Gmbh Katalytischer Brenner
AT402660B (de) * 1994-07-25 1997-07-25 Vaillant Gmbh Heizgerät heizgerät
DE19527767B4 (de) * 1994-07-25 2005-08-25 Vaillant Gmbh Heizgerät
AT402100B (de) * 1995-01-23 1997-01-27 Vaillant Gmbh Heizgerät mit einem katalytisch beschichteten brenner
CN100443820C (zh) * 2005-12-24 2008-12-17 中国科学技术大学 采用稀薄－无焰燃烧方式的燃气或燃油锅炉
WO2008095255A1 (fr) * 2007-02-09 2008-08-14 Joregensen, Patrick, Clifford Procédé et dispositif pour des applications de combustion haute température
WO2017193479A1 (fr) * 2016-05-13 2017-11-16 芜湖美的厨卫电器制造有限公司 Chauffe-eau à gaz
CN113983681A (zh) * 2016-09-30 2022-01-28 芜湖美的厨卫电器制造有限公司 燃气热水器
CN109425097A (zh) * 2017-08-31 2019-03-05 芜湖美的厨卫电器制造有限公司 一种燃气热水器
CN109425097B (zh) * 2017-08-31 2024-02-23 芜湖美的厨卫电器制造有限公司 一种燃气热水器
CN110887234A (zh) * 2018-09-07 2020-03-17 芜湖美的厨卫电器制造有限公司 燃烧器组件及热水器
CN110887234B (zh) * 2018-09-07 2024-04-16 芜湖美的厨卫电器制造有限公司 燃烧器组件及热水器
CN112303894A (zh) * 2019-07-30 2021-02-02 芜湖美的厨卫电器制造有限公司 燃气热水器和燃气热水器的控制方法
CN114061151A (zh) * 2020-07-27 2022-02-18 芜湖美的厨卫电器制造有限公司 燃烧器组件和燃气热水器

Also Published As

Publication number Publication date
CZ138193A3 (en) 1994-03-16
CZ279359B6 (cs) 1995-04-12

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