EP0646752A1 - Système de commande pour un générateur de chaleur chauffé par du combustible, notamment un chauffé-eau - Google Patents

Système de commande pour un générateur de chaleur chauffé par du combustible, notamment un chauffé-eau Download PDF

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Publication number
EP0646752A1
EP0646752A1 EP94115246A EP94115246A EP0646752A1 EP 0646752 A1 EP0646752 A1 EP 0646752A1 EP 94115246 A EP94115246 A EP 94115246A EP 94115246 A EP94115246 A EP 94115246A EP 0646752 A1 EP0646752 A1 EP 0646752A1
Authority
EP
European Patent Office
Prior art keywords
exhaust gas
fuel
air ratio
control system
content
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.)
Withdrawn
Application number
EP94115246A
Other languages
German (de)
English (en)
Inventor
Walter Dipl.-Ing. Daniel (Fh)
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0646752A1 publication Critical patent/EP0646752A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/003—Systems for controlling combustion using detectors sensitive to combustion gas properties
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2233/00—Ventilators
    • F23N2233/06—Ventilators at the air intake
    • F23N2233/08—Ventilators at the air intake with variable speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/12—Fuel valves
    • F23N2235/16—Fuel valves variable flow or proportional valves

Definitions

  • the invention is based on a control system according to the type of the main claim.
  • a solid electrolyte is provided as the sensor, which detects the oxygen content of the exhaust gas and in which the oxygen content is monitored by minimizing the air ratio (fuel-air ratio) and thus the exhaust gas losses.
  • the arrangement according to the invention with the characterizing features of the main claim has the advantage that a safety margin to at least one of the exhaust gas components mentioned is eliminated, so that the combustion at or as close as possible to the permissible Limit of this component is regulated and the energy and exhaust gas loss from the combustion or the pollutant emission can be kept as small as possible.
  • two measuring sensors are provided in the exhaust gas path of the heat generator, one of which is designed to detect the CO content and the other to detect the NO x content. This ensures that neither of the two exhaust gas components mentioned can exceed the permissible limit.
  • the invention provides a sensor that detects the CO content in the exhaust gas, and that the air ratio is regulated back to an operating point just before the steep rise in the CO content. At this operating point, at which the NO x content is below the permissible limit, the combustion takes place almost stoichiometrically, with minimal emission values.
  • a sensor which detects the NO x content in the exhaust gas can additionally be provided and the sum of the two measured exhaust gas components can be regulated to a minimum.
  • each component can be evaluated with a factor before the sum is formed.
  • FIG. 1 shows a valid one for both exemplary embodiments Control system in a schematic representation and Figures 2 and 3 functional diagrams of a conventional and a catalytic burner, in which the exhaust gas emissions of CO and NO x of the burner are plotted against the air ratio of the supplied fuel-air mixture.
  • the control system according to the invention for a preferably gas-operated heat generator 10, for example a water heater for heating and / or hot water preparation, has in the exhaust gas path 12 a sensor 14 which detects the CO content of the exhaust gases and a sensor 16 which detects their NO x content. Both sensors 14 , 16 are connected to a controller 18 which acts on an actuator 20 on a fuel line 22 and an actuator 24 on an air line 26. The two lines 22, 26 lead to a mixing device in the heat generator 10, which is connected upstream of the burner.
  • the controller 18 controls the fuel-air ratio (the air ratio) so that the combustion takes place at the limit value of one exhaust gas component CO or NO x , which is lower than the limit value of the other exhaust gas component.
  • the fuel-air ratio the air ratio
  • FIG. 2 the diagram according to FIG. 2, in which the exhaust gas emissions of NO x are plotted with a fully extended characteristic curve 30 and those of CO with a dashed curve 32 over the air ratio lambda.
  • the limit lines 34 for the permissible NO x content and the limit value line 36 for the permissible CO content are also plotted in the diagram.
  • the setpoint of the control is placed on the operating point P, whose ordinate 38 intersects the characteristic curve 30 for the NO x content at that point 40 through which the limit value line 34 for this exhaust gas component also passes.
  • the control deviation is set in the direction of the increase in the air ratio, so that the permissible limit value of NO x is certainly not exceeded.
  • the characteristic curve 32 of the CO content can run through appropriate training or design of all variables influencing the combustion such that the ordinate 38 of the operating point P also the characteristic curve 32 together with the limit value line 36 of this exhaust gas component in one intersects common point 42.
  • the combustion is near stoichiometric with the air number 1.
  • the exhaust emission of NO x with a fully drawn characteristic curve 46 and the CO emission at the dashed curve 48 plotted against the air ratio lambda.
  • the limit lines 34 and 36 for NO x and CO content are also shown in this diagram.
  • the CO characteristic curve 48 drops to a value close to zero and, as the characteristic curve 46 shows, the NO x emission is also greatly reduced with the value 1 of the air ratio.
  • the control is advantageously carried out in such a way that, starting from an air ratio slightly above the value 1, the air volume is steadily reduced until the CO content in the exhaust gas suddenly increases. The combustion then takes place in regulated manner in the operating range 50, in which both exhaust gas components do not exceed the permissible limit values or are below these limit values and the emission values reach a minimum.
  • the NO x content can also be recorded and the sum of the two exhaust gas components can be regulated to a minimum.
  • each component can be weighted with a factor when forming the sum.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Regulation And Control Of Combustion (AREA)
EP94115246A 1993-10-04 1994-09-28 Système de commande pour un générateur de chaleur chauffé par du combustible, notamment un chauffé-eau Withdrawn EP0646752A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4333751 1993-10-04
DE4333751A DE4333751A1 (de) 1993-10-04 1993-10-04 Regelsystem für einen mit Brennstoff betriebenen Wärmeerzeuger, insbesondere Wassererhitzer

Publications (1)

Publication Number Publication Date
EP0646752A1 true EP0646752A1 (fr) 1995-04-05

Family

ID=6499344

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94115246A Withdrawn EP0646752A1 (fr) 1993-10-04 1994-09-28 Système de commande pour un générateur de chaleur chauffé par du combustible, notamment un chauffé-eau

Country Status (2)

Country Link
EP (1) EP0646752A1 (fr)
DE (1) DE4333751A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0807677A2 (fr) * 1996-05-14 1997-11-19 Ethyl Corporation Combustion améliorée de combustibles hydrocarbures pour brûleur
WO2002103242A1 (fr) * 2001-06-15 2002-12-27 Honeywell International Inc. Strategie d'optimisation prudente pour reduction d'emission
EP2428732A3 (fr) * 2010-09-08 2014-11-19 Honeywell Technologies Sarl Dispositif de calibrage d'une régulation de brûleur à gaz

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111538355B (zh) * 2020-05-06 2023-02-24 安徽工业大学 一种基于ga-igpc的锅炉烟气含氧量控制方法和系统

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6033423A (ja) * 1983-08-05 1985-02-20 Babcock Hitachi Kk 燃焼装置の制御方法
EP0154361A1 (fr) * 1984-02-08 1985-09-11 Veg-Gasinstituut N.V. Brûleur à gaz
EP0156200A1 (fr) * 1984-03-08 1985-10-02 Ruhrgas Aktiengesellschaft Méthode et dispositif pour déterminer le rapport de mélange d'un mélange contenant un gaz porteur d'oxygène et un carburant
EP0156958A1 (fr) * 1984-03-21 1985-10-09 Hartmann & Braun Aktiengesellschaft Procédé de régulation de la quantité d'air de combustion d'une installation de chauffage
JPS6361815A (ja) * 1986-09-01 1988-03-18 Hitachi Ltd ボイラ自動制御装置
JPH0579622A (ja) * 1991-09-18 1993-03-30 Hitachi Ltd 燃焼炉に於ける酸素濃度制御による燃焼制御方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1539770A (en) * 1975-04-17 1979-01-31 Nippon Soken Controlling the air-to-fuel ratio in internal combustion engines
GB1511467A (en) * 1975-04-22 1978-05-17 Nissan Motor Closed-loop mixture control system for internal combustion engine using errorcorrected exhaust gas sensors
DE2713988A1 (de) * 1977-03-30 1978-10-05 Bosch Gmbh Robert Verfahren und einrichtung zur bestimmung der verhaeltnisanteile des einer brennkraftmaschine zugefuehrten kraftstoff-luftgemisches
DE2941753A1 (de) * 1979-10-16 1981-04-30 Robert Bosch Gmbh, 7000 Stuttgart Verfahren zum regeln der zusammensetzung des betriebsgemisches an einer brennkraftmaschine
GB8429292D0 (en) * 1984-11-20 1984-12-27 Autoflame Eng Ltd Fuel burner controller

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6033423A (ja) * 1983-08-05 1985-02-20 Babcock Hitachi Kk 燃焼装置の制御方法
EP0154361A1 (fr) * 1984-02-08 1985-09-11 Veg-Gasinstituut N.V. Brûleur à gaz
EP0156200A1 (fr) * 1984-03-08 1985-10-02 Ruhrgas Aktiengesellschaft Méthode et dispositif pour déterminer le rapport de mélange d'un mélange contenant un gaz porteur d'oxygène et un carburant
EP0156958A1 (fr) * 1984-03-21 1985-10-09 Hartmann & Braun Aktiengesellschaft Procédé de régulation de la quantité d'air de combustion d'une installation de chauffage
JPS6361815A (ja) * 1986-09-01 1988-03-18 Hitachi Ltd ボイラ自動制御装置
JPH0579622A (ja) * 1991-09-18 1993-03-30 Hitachi Ltd 燃焼炉に於ける酸素濃度制御による燃焼制御方法

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 12, no. 286 (M - 727) 5 August 1988 (1988-08-05) *
PATENT ABSTRACTS OF JAPAN vol. 17, no. 407 (M - 1554) 29 July 1993 (1993-07-29) *
PATENT ABSTRACTS OF JAPAN vol. 9, no. 158 (M - 393) 3 July 1985 (1985-07-03) *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0807677A2 (fr) * 1996-05-14 1997-11-19 Ethyl Corporation Combustion améliorée de combustibles hydrocarbures pour brûleur
EP0807677A3 (fr) * 1996-05-14 1998-01-07 Ethyl Corporation Combustion améliorée de combustibles hydrocarbures pour brûleur
WO2002103242A1 (fr) * 2001-06-15 2002-12-27 Honeywell International Inc. Strategie d'optimisation prudente pour reduction d'emission
EP2428732A3 (fr) * 2010-09-08 2014-11-19 Honeywell Technologies Sarl Dispositif de calibrage d'une régulation de brûleur à gaz

Also Published As

Publication number Publication date
DE4333751A1 (de) 1995-04-06

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