EP0342347A2 - Méthode pour réduire l'effet de grandeurs déréglantes pour brûleurs à soufflerie et brûleurs à soufflerie - Google Patents

Méthode pour réduire l'effet de grandeurs déréglantes pour brûleurs à soufflerie et brûleurs à soufflerie Download PDF

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Publication number
EP0342347A2
EP0342347A2 EP89106131A EP89106131A EP0342347A2 EP 0342347 A2 EP0342347 A2 EP 0342347A2 EP 89106131 A EP89106131 A EP 89106131A EP 89106131 A EP89106131 A EP 89106131A EP 0342347 A2 EP0342347 A2 EP 0342347A2
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EP
European Patent Office
Prior art keywords
air
pressure
change
gas
mass flow
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
EP89106131A
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German (de)
English (en)
Other versions
EP0342347B1 (fr
EP0342347A3 (en
Inventor
Paul Prof. Dr Ing. Profos
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.)
Conel AG
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Conel AG
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Publication of EP0342347A3 publication Critical patent/EP0342347A3/de
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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
    • F23N2223/00—Signal processing; Details thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2223/00—Signal processing; Details thereof
    • F23N2223/34—Signal processing; Details thereof with feedforward processing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2225/00—Measuring
    • F23N2225/04—Measuring pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2225/00—Measuring
    • F23N2225/08—Measuring temperature
    • F23N2225/13—Measuring temperature outdoor temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2225/00—Measuring
    • F23N2225/08—Measuring temperature
    • F23N2225/21—Measuring temperature outlet temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/02—Air or combustion gas valves or dampers
    • F23N2235/10—Air or combustion gas valves or dampers power assisted, e.g. using electric motors
    • 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 present invention relates to a method for reducing the effect of disturbance variables on the combustion in fan burner systems in which a fuel and / or air flow is set according to a desired load level, a fan burner system with a fan burner with air supply and fuel supply, an arrangement for measuring a relative Change in density or, with at least almost constant gas volume flow, a relative change in mass flow of a gas as a function of its pressure and temperature, and use of the method.
  • the procedure according to claim 4 is preferably used.
  • a pressure equalization is created between the sample gas and the gas, thus determining the pressure reference size.
  • the measured relative end tion of the pressure difference is equal to the relative change in density in the gas and, with at least an almost constant gas volume flow, is at least almost equal to the relative change in gas mass flow.
  • a forced draft burner system according to the invention is distinguished by the wording of claim 7, and an arrangement for measuring the relative change in density of a gas as a function of its pressure and its temperature is distinguished by the wording of claim 9.
  • the method according to the invention is particularly suitable for use on forced draft burners which are operated in discrete load stages, in particular for one- or two-stage forced draft burners.
  • a burner 1 schematically shows a burner 1 for the combustion of fuel with a practically constant calorific value, such as heating oil EL, natural gas etc.
  • the fuel flow B * is fed to the burner 1 via a line 3 with actuator 5 and, analogously, via a line 7 the air flow L *, in turn provided by an actuator 9.
  • the two actuators 5 and 9 are driven by servomotors 11 and 13.
  • disturbance variables z such as fuel pressure, specific air requirement, air temperature, air pressure, air humidity, conditions on the chimney draft
  • a sensor arrangement 17 On the output side of the compensator arrangement 19 shown in FIG. 1, compensation signals s B and s L are generated, which are each fed to a superimposition unit 21 or 23 in the fuel flow and / or air flow control path. The influence of the measured disturbance variables z is thus compensated for by intervention in the fuel flow and / or air flow.
  • the relative change in the air mass flow with at least almost constant air volume flow is at least almost equal to the difference between the relative change in air pressure and the relative change in air temperature, both the combustion air supplied to the burner. It can now be shown that the relative change of the air factor is equal to the relative change in the air mass flow mentioned in (1), or that the related change in the oxygen content in the flue gas is, in a first approximation, proportional to the relative change in the air mass flow mentioned.
  • the fuel pressure in particular the setpoint of an intended fuel pressure control, is to be intervened, this is done, at least to a first approximation in which means: the change in fuel pressure with respect to the fuel pressure at the above-mentioned reference ratios.
  • FIG. 1 schematically shows a fan burner system according to the invention, which has a compensation arrangement, in order to compensate for the influence of the main disturbance variables mentioned.
  • the air temperature ⁇ L and the static air pressure p L are measured in the air flow L * of the burner, which is basically constructed and fed as shown in FIG. 1.
  • the compensator 25 which acts as a superimposition unit according to (1), is supplied with adjustable constants K p and K ⁇ in accordance with the standardization variables and from (1).
  • the pressure measured value signal is first weighted at the compensator 25 with the normalization factor K p and analogously the temperature measured value signal with the weighting factor K regimen. By forming the difference, the expression shown in (1) on the right is then formed in an electrically analog manner in compensator 25.
  • the output signal of the compensator 25 As mentioned, corresponding to the result of (1), inverted according to (2) and superimposed on a superposition unit 27 in the control path for the air flow L *, the load level-dependent control signal. If it is preferred to intervene on the control signal path for the fuel stream B *, this is done, analogously, according to (3) on a superimposition unit in the fuel flow control signal path.
  • the superimposition takes place according to (4) on the fuel pressure control signal.
  • electrical reference signals for example after optimally setting the combustion, for example when starting up the system, are set as p Lo and T Lo in accordance with the then prevailing pressure and temperature values.
  • Fig. 3 the basic structure of the compensator 25 for an intervention in the air mass flow L * is shown in more detail.
  • Conventional sensors with electrical output signals such as thermocouples, resistance thermometers and pressure sensors, can be used as transducers 28 and 29 for sizes ⁇ L and p L.
  • the further task now is to determine the relative change in the air mass flow as a function of the relative change in the air pressure and the air temperature in the simplest possible manner.
  • this can be done by individually recording air pressure and temperature, appropriate weighting and offsetting according to (1).
  • this extremely simple procedure is preferably used for the detection of the air mass flow changes caused by the main disturbance variable in the forced air burner system compensated for the disturbance variable, but can in principle be used wherever a change in gas density or change in gas mass flow as a function of the gas pressure and the gas temperature is to be recorded .
  • a gas volume V is encapsulated in a closed container 30 for this purpose.
  • the vessel 30 lies in the gas stream L *.
  • T L T V applies.
  • the difference between the static pressure p a in the gas stream L * and the pressure p V in the vessel 30 is measured by means of a differential pressure sensor 33.
  • a differential pressure signal p a - p V appears at the output of the differential pressure sensor 33, which , based on the pressure p ao at reference ratios, equal to the relative change in density in the ambient gas L, which in turn, at at least almost constant volume flow V *, is at least almost equal to the gas mass flow change ⁇ L * with respect to the same reference ratios, ie L0 *.
  • one condition is that the output signal of the differential pressure measurement by means of the sensor 33 is proportional to the relative density or gas mass flow change, that the gas of the flow L * and that in the vessel 30 are at the same temperatures.
  • radiation protection 31 is therefore provided, which prevents thermal radiation from the outside and corresponding measurement errors.
  • the closed vessel 30 is arranged on the fuel line 7 of a forced draft burner according to FIG. 2 with a fan 37.
  • the differential pressure sensor 33 measures the pressure difference between the static pressure in the flowing combustion air and the gas pressure, preferably air pressure, in the vessel 30.
  • the output signal swing of the sensor 33 is zero-symmetrical.
  • the output signal of the differential pressure sensor 33 is fed to an amplifier 39, preferably with an adjustable gain.
  • the fuel pressure in line 3 to the burner is regulated to a predetermined value by means of a schematically illustrated pressure regulating valve 41, the valve body 45 operating in the regulating sense against the force of a spring 43 additionally carrying a magnet armature 47 which runs in two fixed coils 49 and 51 .
  • the coil 49 is activated via a diode D1 and a voltage / current converter 53, and at the other polarity of the output signal of the amplifier 39, the coil 51 is activated via an inverse polarized diode D2 and a voltage / current converter 55.
  • a disturbance variable compensation shift is forced on the valve body 45 of the control valve 41 by the force of one of the coils 51, 49 in the correct polarity, and the actuating force of the control difference is superimposed, with which the effects of the main disturbance variables, namely the temperature and pressure changes in the combustion air, on the combustion by intervention be compensated for the fuel flow B *.
  • the structure of the valve is shown in detail in DE-PS 3513282.
  • pressure equalization between the container 30 and the air flow L * is achieved with the schematically illustrated valve 53, for example with an optimally adjusted burner.

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)
  • Air Supply (AREA)
  • Incineration Of Waste (AREA)
EP89106131A 1988-04-16 1989-04-07 Méthode pour réduire l'effet de grandeurs déréglantes pour brûleurs à soufflerie et brûleurs à soufflerie Expired - Lifetime EP0342347B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3812697 1988-04-16
DE3812697A DE3812697A1 (de) 1988-04-16 1988-04-16 Verfahren zur reduzierung der stoergroessenwirkung bei geblaesebrenneranlagen und geblaesebrenneranlage

Publications (3)

Publication Number Publication Date
EP0342347A2 true EP0342347A2 (fr) 1989-11-23
EP0342347A3 EP0342347A3 (en) 1990-04-04
EP0342347B1 EP0342347B1 (fr) 1995-12-06

Family

ID=6352124

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89106131A Expired - Lifetime EP0342347B1 (fr) 1988-04-16 1989-04-07 Méthode pour réduire l'effet de grandeurs déréglantes pour brûleurs à soufflerie et brûleurs à soufflerie

Country Status (4)

Country Link
US (1) US5106294A (fr)
EP (1) EP0342347B1 (fr)
AT (1) ATE131273T1 (fr)
DE (2) DE3812697A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5369270A (en) * 1990-10-15 1994-11-29 Interactive Light, Inc. Signal generator activated by radiation from a screen-like space
AT399219B (de) * 1991-09-09 1995-04-25 Vaillant Gmbh Brennerbeheizter wasserspeicher

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4109841C2 (de) * 1991-03-26 1994-06-09 Bosch Gmbh Robert Regelvorrichtung für Gasbrenner mit einem Gebläse zum Zuführen von Verbrennungsluft
AT399234B (de) * 1992-12-21 1995-04-25 Vaillant Gmbh Drucksensorik
US5722588A (en) * 1994-04-13 1998-03-03 Nippon Soken Inc. Combustion heater
US5634786A (en) * 1994-11-30 1997-06-03 North American Manufacturing Company Integrated fuel/air ratio control system
DE19510425C2 (de) * 1995-03-24 1999-05-27 Bosch Gmbh Robert Verfahren und Vorrichtung zur Regelung eines Heizgerätes
US6363164B1 (en) 1996-05-13 2002-03-26 Cummins-Allison Corp. Automated document processing system using full image scanning
US7136767B2 (en) * 2002-06-24 2006-11-14 Mks Instruments, Inc. Apparatus and method for calibration of mass flow controller
US7809473B2 (en) 2002-06-24 2010-10-05 Mks Instruments, Inc. Apparatus and method for pressure fluctuation insensitive mass flow control
US6712084B2 (en) 2002-06-24 2004-03-30 Mks Instruments, Inc. Apparatus and method for pressure fluctuation insensitive mass flow control
US7033670B2 (en) * 2003-07-11 2006-04-25 Siemens Power Generation, Inc. LCT-epoxy polymers with HTC-oligomers and method for making the same
US20050277721A1 (en) * 2004-06-15 2005-12-15 Siemens Westinghouse Power Corporation High thermal conductivity materials aligned within resins
DE102004055716C5 (de) * 2004-06-23 2010-02-11 Ebm-Papst Landshut Gmbh Verfahren zur Regelung einer Feuerungseinrichtung und Feuerungseinrichtung (Elektronischer Verbund I)
US7651963B2 (en) 2005-04-15 2010-01-26 Siemens Energy, Inc. Patterning on surface with high thermal conductivity materials
DE102005025285B4 (de) * 2005-06-02 2007-11-08 Rolf Puhlmann Messeinrichtung zur quasi kontinuierlichen Dichtebestimmung der Luft-Hauptkomponenten Sauerstoff und Stickstoff und deren Verwendung
US8357433B2 (en) 2005-06-14 2013-01-22 Siemens Energy, Inc. Polymer brushes
US7781057B2 (en) * 2005-06-14 2010-08-24 Siemens Energy, Inc. Seeding resins for enhancing the crystallinity of polymeric substructures
US20090142717A1 (en) * 2007-12-04 2009-06-04 Preferred Utilities Manufacturing Corporation Metering combustion control
US8191387B2 (en) * 2009-05-01 2012-06-05 Owens-Brockway Glass Container Inc. System and method for controlling temperature in a forehearth
DE102016117323B3 (de) * 2016-09-14 2017-11-02 Valeo Thermal Commercial Vehicles Germany GmbH Verfahren zur Konstanthaltung des dem Brennerraum eines mobilen Heizgerätes zugeführten Verbrennungsluft-Massenstroms und nach einem solchen Verfahren arbeitendes Heizgerät

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EP0086337A1 (fr) * 1982-02-04 1983-08-24 Programmelectronic Engineering Ag Procédé et dispositif de réglage pour la régulation d'excès d'air dans les chauffages
JPS60105822A (ja) * 1983-11-15 1985-06-11 Kaneko Agricult Mach Co Ltd バ−ナにおける燃焼制御装置
US4583936A (en) * 1983-06-24 1986-04-22 Gas Research Institute Frequency modulated burner system
DE3513282C1 (de) * 1985-04-13 1986-06-12 Programmelectronic Engineering AG, Dornach Stellmotor
US4613072A (en) * 1984-07-31 1986-09-23 Mikuni Kogyo Kabushiki Kaisha Apparatus for heating fluid by burning liquid fuel
GB2190515A (en) * 1986-04-15 1987-11-18 Julian Branford Todd Regenerator control by flue recirculation

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0086337A1 (fr) * 1982-02-04 1983-08-24 Programmelectronic Engineering Ag Procédé et dispositif de réglage pour la régulation d'excès d'air dans les chauffages
US4583936A (en) * 1983-06-24 1986-04-22 Gas Research Institute Frequency modulated burner system
JPS60105822A (ja) * 1983-11-15 1985-06-11 Kaneko Agricult Mach Co Ltd バ−ナにおける燃焼制御装置
US4613072A (en) * 1984-07-31 1986-09-23 Mikuni Kogyo Kabushiki Kaisha Apparatus for heating fluid by burning liquid fuel
DE3513282C1 (de) * 1985-04-13 1986-06-12 Programmelectronic Engineering AG, Dornach Stellmotor
GB2190515A (en) * 1986-04-15 1987-11-18 Julian Branford Todd Regenerator control by flue recirculation

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5369270A (en) * 1990-10-15 1994-11-29 Interactive Light, Inc. Signal generator activated by radiation from a screen-like space
AT399219B (de) * 1991-09-09 1995-04-25 Vaillant Gmbh Brennerbeheizter wasserspeicher

Also Published As

Publication number Publication date
ATE131273T1 (de) 1995-12-15
US5106294A (en) 1992-04-21
EP0342347B1 (fr) 1995-12-06
DE3812697C2 (fr) 1993-04-08
DE58909519D1 (de) 1996-01-18
DE3812697A1 (de) 1989-12-28
EP0342347A3 (en) 1990-04-04

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