EP3593047A1 - Procédé d'identification de types de gaz combustibles lors du processus de démarrage d'un appareil de chauffage fonctionnant au gaz combustible et appareil de chauffage fonctionnant au gaz combustible - Google Patents

Procédé d'identification de types de gaz combustibles lors du processus de démarrage d'un appareil de chauffage fonctionnant au gaz combustible et appareil de chauffage fonctionnant au gaz combustible

Info

Publication number
EP3593047A1
EP3593047A1 EP19701202.4A EP19701202A EP3593047A1 EP 3593047 A1 EP3593047 A1 EP 3593047A1 EP 19701202 A EP19701202 A EP 19701202A EP 3593047 A1 EP3593047 A1 EP 3593047A1
Authority
EP
European Patent Office
Prior art keywords
gas
fuel gas
ignition
fuel
gas mass
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
EP19701202.4A
Other languages
German (de)
English (en)
Other versions
EP3593047B1 (fr
Inventor
Stephan Wald
Jan Dannemann
Enno Vrolijk
Hartmut Henrich
Hans-Joachim Klink
Jens Hermann
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.)
Ebm Papst Landshut GmbH
Original Assignee
Ebm Papst Landshut 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 Ebm Papst Landshut GmbH filed Critical Ebm Papst Landshut GmbH
Publication of EP3593047A1 publication Critical patent/EP3593047A1/fr
Application granted granted Critical
Publication of EP3593047B1 publication Critical patent/EP3593047B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/02—Regulating fuel supply conjointly with air supply
    • F23N1/022—Regulating fuel supply conjointly with air supply 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
    • F23N5/18—Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel
    • F23N2005/185—Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel using detectors sensitive to rate of flow of fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2221/00—Pretreatment or prehandling
    • F23N2221/10—Analysing fuel properties, e.g. density, calorific
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2239/00—Fuels
    • F23N2239/04—Gaseous fuels

Definitions

  • the invention relates to a method for fuel gas detection in a fuel gas operated heater.
  • low calorific and high calorific natural gas and liquefied gas are distinguished as fuel gas types.
  • an ignitable fuel gas-air mixture When starting a burner of the heater, an ignitable fuel gas-air mixture should be adjusted in the shortest possible time. Since both the optimal For the different combustion gases, the determination of the type of gas before or during burner start-up is necessary to adjust the fuel gas and air quantities to optimum starting conditions.
  • a method for the recognition of fuel gas during the starting process of a gas-operated heater with electronic gas-air network, wherein the heater at least one fan for promoting an air volume flow, a gas supply with a gas actuator for the controlled supply of a fuel gas, a burner, an ignition unit Ignition of the burner, a sensor arranged in the gas supply and flowed by the fuel gas, and a control unit for controlling at least the air volume flow conveyed by the fan and the gas actuator determining a gas mass flow to the fuel gas.
  • the sensor is designed as a gas mass sensor, which detects both the fuel gas mass supplied to the burner and also a further physical property of the fuel gas, with which conclusions can be drawn about the composition of the fuel gas.
  • calorimetric microsensors are used for this, which detect the thermal conductivity of the fuel gas in addition to the fuel gas mass.
  • Another possibility consists in at least one sensor based on the principle of operation of the ultrasound measurement for determining the fuel gas mass and the specific speed of sound depending on the particular fuel gas.
  • At least one of the aforementioned physical properties of the fuel gas is measured by the gas mass sensor (for example the thermal conductivity) and transmitted to the control unit.
  • the control unit determines from this measured intrinsic The combustion gas of the fuel gas.
  • control unit regulates at the gas actuator in dependence on the particular type of fuel gas, a first starting gas mass flow, which is below an ignition limit of the fuel gas of the particular fuel gas.
  • the ignition limits of the respective types of fuel gas are well known and can be stored, for example in the form of characteristics in the control unit.
  • the supplied gas mass flow is increased at a constant air volume flow, starting from the starting gas mass flow under constant ignition attempts of the ignition unit until an ignition range of the predetermined fuel gas is exceeded.
  • the control unit if there is an ignition of the burner.
  • an electrode can be used on the burner, which transmits a flame signal to the control unit in the event of ignition of the burner.
  • the ignition range of the respective fuel gas species differs in LPG and natural gas because high calorie fuel gas, e.g. Liquefied gas at an identical air volume flow ignites earlier than low calorie fuel gas, e.g. low calorific natural gas (L gas). It is clearly defined in the art in which areas of the fuel gas-air mixture of the respective ignition range of the respective fuel gas is located.
  • high calorie fuel gas e.g. Liquefied gas at an identical air volume flow ignites earlier than low calorie fuel gas, e.g. low calorific natural gas (L gas).
  • the method according to the invention it is possible to determine the type of fuel gas before the ignition of the burner and to limit the fuel gas-air mixture required for the start to a smaller range.
  • the optimum mixture of fuel gas and air to start the burner is detected and achieved more quickly. This shortens the start time and reduces the number of failed attempts at burner startup.
  • the control unit on the gas actuator depending on the particular fuel gas type controls a second starting gas mass flow, which is lower than the first gas mass flow and further below the ignition limit of the fuel gas of the particular fuel gas.
  • the steps of the above-described starting method are carried out again comprising increasing the gas mass flow supplied at a constant air flow rate under constant ignition attempts of the ignition unit until an ignition range of the predetermined type of fuel gas is exceeded. It is advantageous that the area in which the appropriate gas-air mixture is present for the starting process of the burner, extended and a burner start can be achieved, even if the first fixed starting gas mass flow was unsuitable.
  • the method is characterized in one embodiment in that the supplied gas mass flow is increased at a constant air volume flow starting from the starting gas mass flow steadily under ignition attempts of the ignition unit.
  • the constant air volume flow is through the control unit through
  • the method is further characterized in that the control unit calculates the actual air volume flow via a blower speed measured by the control unit, a characteristic curve determined in advance from the laboratory and a current consumption of the blower.
  • the method not only affects the burner start-up in general, but also the burner start-up during the first start-up of the heater.
  • first a venting of a gas line of the gas supply is performed, wherein the control unit, the gas actuator open and on the gas mass sensor Signal is sent to the control unit as soon as fuel gas is detected.
  • the gas mass sensor can be used at any time for the detection of air in the gas supply to cause a venting of the gas line.
  • a venting of a gas line of the gas supply is initially carried out during the startup of the gas-fired heater after its initial installation, wherein the starting process described above to solve the task is repeated until an ignition of the burner is detected.
  • the gas mass flow is regulated by the electrical modulating gas actuator, wherein the gas actuator receives control signals via the control unit and thus adapts the gas mass flow as needed.
  • the control unit determines from the fuel gas type determined via the gas mass sensor the air requirement associated with the respective fuel gas type and to use this for the further control of the operation of the heater.
  • corresponding values or characteristic curves are stored in the control unit, which can be used for the control or for future starting operations.
  • sizes known in the art for example a greater than a factor of 3 in order to ensure complete combustion by a factor of 3, with the same volume of liquefied natural gas compared to natural gas.
  • FIG. 1 shows a schematic structure of a heater
  • FIG. 2 shows a diagram of the method sequence for high-calorie fuel gas
  • Fig. 3 is a diagram of the procedure at low calorie
  • FIG. 1 shows a schematic structure of a Fleizeries 100 for performing the method with a modulating premixing fan 5, the ambient air a sucks and mixed with fuel gas.
  • the fuel gas is supplied to the pre-mixing blower 5 via a gas nozzle 4 in the gas line, wherein a gas safety valve 1, an electronically controllable by way of a motor M gas actuator or gas valve 2 and a thermal gas mass sensor 3 are arranged upstream in the gas line.
  • the gas inlet pressure d is adjusted to the gas control pressure c.
  • the fuel gas / air mixture has the mixture pressure b.
  • Blower outlet is an optional check valve 6 is provided in the embodiment shown.
  • the mixture then has the burner pressure e.
  • This is followed by the burner 28 with an electrode 7 arranged in the burner flame, with which a flame is detected at the burner 28 and a corresponding signal is transmitted to the control unit 9.
  • the heat exchanger 18 is arranged.
  • the exhaust system follows with the exhaust flap 8.
  • the exhaust gas pressure prevails f.
  • the regulation of the amount of fuel gas flowing through the gas actuator 2 as the fan speed and thus the air ratio is controlled by the control unit 9, are stored in the corresponding control characteristics and stored.
  • the corresponding signal lines to and from the controller 9 are indicated by arrows.
  • Figure 2 shows the flow of the method for gas detection of navalkalo witzm fuel gas, after the thermal gas mass sensor 3 the thermal conductivity of the adjacent fuel gas was measured and transmitted to the control unit 9.
  • the air volume flow VL is initially regulated to a constant value via the blower 5 in the time interval t1-t2.
  • the gas mass flow VG regulated by the gas actuator 2 is regulated to the starting gas mass flow, which lies below a lower ignition limit z1 of an ignition range HG of the high-calorie combustible gas.
  • the control unit 9 then regulates the gas actuator 2 in the time interval t2-t3 at a constant air volume flow VL in order to steadily increase the gas mass flow VG supplied to the blower 5 from the starting gas mass flow under constant ignition attempts of the ignition unit until the ignition region HG of the high-calorie fuel gas and a upper ignition limit z2 of the high-calorie fuel gas are exceeded.
  • the burner 28 ignites in the time interval t2-t3 and then burns in the time interval t3-t4 with constant regulated gas mass flow VG.
  • the necessary for low-calorie fuel gas fuel gas and with the ignition range LG of low calorific fuel gas are not he enough.
  • FIG. 3 shows the method on the basis of the same diagram from FIG. 2, as far as it has been established via the thermal gas mass sensor 3 that it concerns low-calorie fuel gas. Then, the gas mass flow VG is increased at a constant air volume flow VG from the beginning over the ignition range HG of the high calorie fuel gas, wherein the starting gas mass flow is below the lower ignition limit z3 an ignition range LG of the low calorie fuel gas.
  • the control unit 9 then regulates the gas actuator 2 in the time interval t2-t3 at a constant air volume flow VL in order to supply the gas mass flow VG supplied to the blower 5 starting from the starting point.

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)

Abstract

L'invention concerne un procédé d'identification de types de gaz combustible lors du processus de démarrage d'un appareil de chauffage fonctionnant au gaz combustible, à mélange air-gaz électronique, au moyen d'un capteur de masse gazeuse pour déterminer le type de gaz combustible avant le démarrage du brûleur.
EP19701202.4A 2018-03-07 2019-01-18 Procédé d'identification de types de gaz combustibles lors du processus de démarrage d'un appareil de chauffage fonctionnant au gaz combustible et appareil de chauffage fonctionnant au gaz combustible Active EP3593047B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018105185.9A DE102018105185A1 (de) 2018-03-07 2018-03-07 Verfahren zur Brenngasartenerkennung bei einem brenngasbetriebenen Heizgerät
PCT/EP2019/051222 WO2019170309A1 (fr) 2018-03-07 2019-01-18 Procédé d'identification de types de gaz combustibles lors du processus de démarrage d'un appareil de chauffage fonctionnant au gaz combustible et appareil de chauffage fonctionnant au gaz combustible

Publications (2)

Publication Number Publication Date
EP3593047A1 true EP3593047A1 (fr) 2020-01-15
EP3593047B1 EP3593047B1 (fr) 2021-04-07

Family

ID=65138994

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19701202.4A Active EP3593047B1 (fr) 2018-03-07 2019-01-18 Procédé d'identification de types de gaz combustibles lors du processus de démarrage d'un appareil de chauffage fonctionnant au gaz combustible et appareil de chauffage fonctionnant au gaz combustible

Country Status (4)

Country Link
EP (1) EP3593047B1 (fr)
CN (1) CN110582673B (fr)
DE (1) DE102018105185A1 (fr)
WO (1) WO2019170309A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI821703B (zh) * 2021-07-06 2023-11-11 關隆股份有限公司 智慧型寬熱值燃氣設備及其控制方法
DE102021127952A1 (de) * 2021-10-27 2023-04-27 Vaillant Gmbh Verfahren zur Inbetriebnahme eines Heizgerätes, Heizgerät, Computerprogramm und maschinenlesbares Speichermedium
DE102022101305A1 (de) 2022-01-20 2023-07-20 Ebm-Papst Landshut Gmbh Verfahren zur fehlersicheren und mageren Zündung eines Brenngas-Luft-Gemisches an einem Gasbrenner
EP4265965A1 (fr) 2022-04-22 2023-10-25 BDR Thermea Group B.V. Mécanisme de commande pour un appareil de combustion

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CH680749A5 (fr) * 1990-04-04 1992-10-30 Landis & Gyr Betriebs Ag
CN1219667A (zh) * 1997-12-11 1999-06-16 重庆钢铁集团电子有限责任公司 一种空燃比寻优方法
DE19921167A1 (de) * 1999-02-24 2000-08-31 Ruhrgas Ag Verfahren und Anordnung zur Messung des Brennwertes und/oder des Wobbeindexes von Brenngas, insbesondere von Erdgas
DE10114901A1 (de) * 2001-03-26 2002-10-10 Invent Gmbh Entwicklung Neuer Technologien Verfahren und Vorrichtung zur Einstellung der Luftzahl
DE102004058087A1 (de) * 2004-12-01 2006-06-08 G. Kromschröder AG Verfahren zum Brennerstart eines Gasheizgeräts
US20070243495A1 (en) * 2006-04-18 2007-10-18 Robertshaw Controls Company Electronic gas control system
CN101408314B (zh) * 2008-03-19 2010-06-23 首钢总公司 高炉热风炉燃烧过程的自动控制系统
CN102063058B (zh) * 2010-12-14 2012-05-23 广东电网公司电力科学研究院 燃料热值校正方法及校正系统
DE102013106987A1 (de) * 2013-07-03 2015-01-08 Karl Dungs Gmbh & Co. Kg Verfahren und Vorrichtung zur Bestimmung einer Brennwertgröße sowie gasbetriebene Einrichtung mit einer derartigen Vorrichtung
CN104421959A (zh) * 2013-09-10 2015-03-18 北新集团建材股份有限公司 一种燃气的燃烧系统及其点火方法
CN103672949A (zh) * 2013-12-27 2014-03-26 东北大学 一种克服燃气热值和生产节奏波动的加热炉燃烧控制技术
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Also Published As

Publication number Publication date
DE102018105185A1 (de) 2019-09-12
WO2019170309A1 (fr) 2019-09-12
CN110582673B (zh) 2021-03-23
EP3593047B1 (fr) 2021-04-07
CN110582673A (zh) 2019-12-17

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