EP2682679A2 - Procédé de surveillance d'un brûleur à gaz combustible - Google Patents

Procédé de surveillance d'un brûleur à gaz combustible Download PDF

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Publication number
EP2682679A2
EP2682679A2 EP13174488.0A EP13174488A EP2682679A2 EP 2682679 A2 EP2682679 A2 EP 2682679A2 EP 13174488 A EP13174488 A EP 13174488A EP 2682679 A2 EP2682679 A2 EP 2682679A2
Authority
EP
European Patent Office
Prior art keywords
fuel gas
air ratio
volume flow
line
differential pressure
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.)
Granted
Application number
EP13174488.0A
Other languages
German (de)
English (en)
Other versions
EP2682679B1 (fr
EP2682679A3 (fr
Inventor
Richard Fischbuch
Thomas Ernst
Sascha Menser
Heinz-Jörg Tomczak
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.)
Vaillant GmbH
Original Assignee
Vaillant 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 Vaillant GmbH filed Critical Vaillant GmbH
Priority to PL13174488T priority Critical patent/PL2682679T3/pl
Publication of EP2682679A2 publication Critical patent/EP2682679A2/fr
Publication of EP2682679A3 publication Critical patent/EP2682679A3/fr
Application granted granted Critical
Publication of EP2682679B1 publication Critical patent/EP2682679B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N3/00—Regulating air supply or draught
    • F23N3/002—Regulating air supply or draught using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • F23N5/12—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using ionisation-sensitive elements, i.e. flame rods
    • F23N5/123—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using ionisation-sensitive elements, i.e. flame rods using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2225/00—Measuring
    • F23N2225/04—Measuring pressure
    • F23N2225/06—Measuring pressure for determining flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2225/00—Measuring
    • F23N2225/26—Measuring humidity
    • F23N2225/30—Measuring humidity measuring lambda
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2231/00—Fail safe
    • F23N2231/20—Warning devices
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2900/00—Special features of, or arrangements for controlling combustion
    • F23N2900/05181—Controlling air to fuel ratio by using a single differential pressure detector

Definitions

  • the invention relates to a method for monitoring a burner powered by gas.
  • gas-fired burners For a low-emission combustion, gas-fired burners must be operated in a certain range of the fuel gas-air ratio. Burners that are too rich or too lean form excessively toxic carbon monoxide CO.
  • the fuel gas / air ratio changes with the same unit design and setting unchanged. Therefore, changes to the device must be made when changing the gas type. If this is not done, because, for example, the device is not connected or retrofitted by an expert, this has an effect on the exhaust gas behavior.
  • zero pressure controls are used in which the fuel gas supply and the air supply are dimensioned such that a volume flow or differential pressure sensor in a connecting line between fuel gas supply and air supply no volume flow or no differential pressure (zero signal) measures. If the signal of the sensor deviates from the zero signal, the air or fuel gas flow is changed until a zero signal is measured again.
  • the invention has for its object to detect a wrong device setting.
  • the burner can be turned off when a detected setting error.
  • the leaning of the fuel gas to air ratio can be achieved by increasing the speed of the fan while reducing the speed for enrichment.
  • a valve in the fuel gas line can be closed continuously for leaning out the fuel gas / air ratio and be opened continuously to enrich this valve.
  • FIG. 1 shows schematically a heat cell of a heater.
  • a fan 7 causes an air flow through a combustion air line 14 to a burner 9.
  • a combustion air line 14 opens downstream of a throttle point 12, a fuel gas line 2 with a gas orifice 5, in which an electronically adjustable throttle 1 is located.
  • a mass flow sensor 4 is arranged between the fuel gas line 2 and the combustion air line 14 upstream of the throttle point 12 in a measuring line 3.
  • An ionisation current sensor 11 is arranged in the immediate vicinity of the burner 9.
  • a controller 13 is connected to the electronic components.
  • the amount of fuel gas is adjusted via the electronically adjustable throttle 1 and admixed via a gas orifice 5 the air flow and that is precisely so much that in the mass flow sensor 4 just no mass flow is detected (zero pressure condition).
  • the test program is started.
  • the degree of opening of the electronically adjustable throttle 1 is kept constant.
  • the amount of air is steadily increased by increasing the speed of the fan 7 and simultaneously checks the lonisationssignal for flame detection via the ionization current sensor 11. Due to the increase in the air ratio associated with the speed increase of the fan, the flame tends to be lifted. If the flame comes into the range of lifting, the flame resistance increases strongly, which is directly reflected in the ionisation signal. The tendency to lift the flame is detected by the ionization current.
  • the device-specific lifting of the flames is, according to experience, detected at an air ratio of lambda -1.7.
  • an air ratio of lambda -1.7 At this air ratio, either a predetermined limit ionization voltage U limit or a predetermined limit ionization current I limit is detected.
  • the current speed n limit is stored. This speed n limit is multiplied by designed factors to approach operating points with different air numbers. Starting from Lambda 1.7, the operating points ⁇ Test1 and then ⁇ Test2 are approached, where ⁇ Test1 is smaller than the setpoint airspeed and ⁇ Test2 is greater than the setpoint airspeed. In Figure 2, the desired air ratio is 1.25. After setting the desired speed for ⁇ Test1 and ⁇ Test2 , the current value of the mass flow sensor 4 is checked.
  • FIG. 2 shows the pressure difference ⁇ p at the mass flow sensor 4.
  • the pressure difference ⁇ p is equivalent to the mass flow.
  • the fuel gas / air composite must be detuned , As a result, there is a wrong gas-air ratio in the alleged target setting, which would result in high carbon monoxide (CO) emission.
  • the test program according to the invention would trigger an error in this case - the heater would be stopped. The test program triggers an error in this case and the heater is stopped. If the mass flow signal shows plausible results at both operating points for good combustion (flow in each case in the expected direction), the test program is terminated successfully and the normal device operation is released.
  • Safe device operation can be ensured via a mass flow sensor check at device-specific operating points.
  • the fuel gas-air ratio is changed until the volume flow or differential pressure sensor 4 measures no flow.
  • the system is then presumably set correctly; ideally to an air ratio around 1.25.
  • the rotational speed n start (eg 2000 rpm) of the blower 7 is detected and stored.
  • the fuel gas-air ratio defined by increasing the rotational speed of the blower 7 emaciated until the signal measured by means of ionisationsstromsensor 11 exceeds or falls below a predetermined threshold, which is characteristic of a threatening takeoff at an air ratio of 1.7.
  • the associated speed n lifting eg 3000 U / min
  • the ratio of the rotational speed n lifting to the rotational speed n start of the blower 7 is formed.
  • a predetermined ratio range eg, 1.45 to 1.55
  • a proper operating state is inferred. If the ratio n lift off / n start is outside the predetermined ratio range, an adjustment error is inferred and an error signal is output.
  • the same effect is achieved if, instead of the amount of air through the fan at a constant gas flow, the gas quantity is changed over the opening cross section of the electronically adjustable throttle 1 and the fan speed is kept constant.
  • the step positions z start at presumed desired air number and z lift off when threatening take off are detected.

Landscapes

  • 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)
EP13174488.0A 2012-07-04 2013-07-01 Procédé de surveillance d'un brûleur à gaz combustible Active EP2682679B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL13174488T PL2682679T3 (pl) 2012-07-04 2013-07-01 Sposób monitorowania palnika zasilanego paliwem gazowym

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102012013223 2012-07-04

Publications (3)

Publication Number Publication Date
EP2682679A2 true EP2682679A2 (fr) 2014-01-08
EP2682679A3 EP2682679A3 (fr) 2014-08-13
EP2682679B1 EP2682679B1 (fr) 2017-08-30

Family

ID=48703235

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13174488.0A Active EP2682679B1 (fr) 2012-07-04 2013-07-01 Procédé de surveillance d'un brûleur à gaz combustible

Country Status (3)

Country Link
EP (1) EP2682679B1 (fr)
ES (1) ES2646213T3 (fr)
PL (1) PL2682679T3 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3299718A1 (fr) * 2016-09-21 2018-03-28 Siemens Aktiengesellschaft Détection de type de gaz
EP3339735A1 (fr) * 2016-12-21 2018-06-27 Robert Bosch GmbH Procédé de commande d'un rapport air-combustible dans un système de chauffage, unité de commande et système de chauffage
EP3690318A3 (fr) * 2019-01-29 2020-09-30 Vaillant GmbH Procédé et dispositif de régulation d'un mélange air-gaz de combustion dans un appareil de chauffage
CN111829004A (zh) * 2020-06-02 2020-10-27 浙江迈欧科技有限公司 一种电子比例调节燃烧控制方法和控制装置
CN113048509A (zh) * 2021-04-19 2021-06-29 贵州华电塘寨发电有限公司 一种w火焰煤粉锅炉配风控制方法及系统
EP4050258A1 (fr) 2021-02-26 2022-08-31 Siemens Aktiengesellschaft Détermination des performances d'une unité de brûleur à gaz à l'aide d'un paramètre de combustible
EP4336102A1 (fr) * 2022-09-08 2024-03-13 Vaillant GmbH Procédé d'évaluation d'une installation d'un connection gaz-air d'un appareil de chauffage, connection gaz-air et programme informatique
DE102023212455B3 (de) * 2023-11-30 2024-12-24 Siemens Aktiengesellschaft Automatisierung anhand Sauerstoffkonzentration
EP4617566A1 (fr) 2024-03-11 2025-09-17 Siemens Aktiengesellschaft Commande optimisée d'un dispositif de combustion

Family Cites Families (6)

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Publication number Priority date Publication date Assignee Title
FR2775782B1 (fr) * 1998-03-06 2000-05-05 Theobald Sa A Dispositif de mesure de pression differentielle et dispositif pour la regulation active du rapport air/gaz d'un bruleur utilisant un tel dispositif de mesure
DE102007018122B4 (de) * 2007-04-16 2013-10-17 Viessmann Werke Gmbh & Co Kg Flammenüberwachungsvorrichtung mit einer Spannungserzeugungs- und Messanordnung und Verfahren zum Überwachen eines Brenners mittels der Flammenüberwachungsvorrichtung
DE102010021348B4 (de) * 2010-05-22 2012-08-02 Robert Bosch Gmbh Heizgerät mit einer Überwachungseinrichtung, Überwachungseinrichtung und Verfahren zu ihrem Betreiben
AT510075B1 (de) * 2010-07-08 2012-05-15 Vaillant Group Austria Gmbh Verfahren zur kalibrierung einer einrichtung zum regeln des brenngas-luft-verhältnisses eines brenngasbetriebenen brenners
DE102010044762A1 (de) * 2010-09-08 2012-03-08 Honeywell Technologies S.A.R.L. Vorrichtung zur Kalibrierung einer Gasbrennerregelung
AT510002B1 (de) * 2010-12-20 2012-01-15 Vaillant Group Austria Gmbh Verfahren zur regelung eines gas-/luftgemisches

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3299718A1 (fr) * 2016-09-21 2018-03-28 Siemens Aktiengesellschaft Détection de type de gaz
EP3339735A1 (fr) * 2016-12-21 2018-06-27 Robert Bosch GmbH Procédé de commande d'un rapport air-combustible dans un système de chauffage, unité de commande et système de chauffage
EP3690318A3 (fr) * 2019-01-29 2020-09-30 Vaillant GmbH Procédé et dispositif de régulation d'un mélange air-gaz de combustion dans un appareil de chauffage
CN111829004A (zh) * 2020-06-02 2020-10-27 浙江迈欧科技有限公司 一种电子比例调节燃烧控制方法和控制装置
CN111829004B (zh) * 2020-06-02 2023-06-02 浙江迈欧科技有限公司 一种电子比例调节燃烧控制方法和控制装置
EP4050258A1 (fr) 2021-02-26 2022-08-31 Siemens Aktiengesellschaft Détermination des performances d'une unité de brûleur à gaz à l'aide d'un paramètre de combustible
US12565994B2 (en) 2021-02-26 2026-03-03 Siemens Aktiengesellschaft Power output determination by way of a fuel parameter
CN113048509A (zh) * 2021-04-19 2021-06-29 贵州华电塘寨发电有限公司 一种w火焰煤粉锅炉配风控制方法及系统
EP4336102A1 (fr) * 2022-09-08 2024-03-13 Vaillant GmbH Procédé d'évaluation d'une installation d'un connection gaz-air d'un appareil de chauffage, connection gaz-air et programme informatique
DE102023212455B3 (de) * 2023-11-30 2024-12-24 Siemens Aktiengesellschaft Automatisierung anhand Sauerstoffkonzentration
EP4617566A1 (fr) 2024-03-11 2025-09-17 Siemens Aktiengesellschaft Commande optimisée d'un dispositif de combustion

Also Published As

Publication number Publication date
EP2682679B1 (fr) 2017-08-30
PL2682679T3 (pl) 2018-01-31
EP2682679A3 (fr) 2014-08-13
ES2646213T3 (es) 2017-12-12

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