EP0209771A1 - Verfahren und Anordnung zur Feinregulierung des Brennstoffmengenstromes an brennerbetriebenen Feuerungsanlagen durch Messung des Restsauerstoffes und des Kohlenmonoxidgehaltes in den Abgasen - Google Patents

Verfahren und Anordnung zur Feinregulierung des Brennstoffmengenstromes an brennerbetriebenen Feuerungsanlagen durch Messung des Restsauerstoffes und des Kohlenmonoxidgehaltes in den Abgasen Download PDF

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Publication number
EP0209771A1
EP0209771A1 EP86109152A EP86109152A EP0209771A1 EP 0209771 A1 EP0209771 A1 EP 0209771A1 EP 86109152 A EP86109152 A EP 86109152A EP 86109152 A EP86109152 A EP 86109152A EP 0209771 A1 EP0209771 A1 EP 0209771A1
Authority
EP
European Patent Office
Prior art keywords
burner
microprocessor
value
fine
fuel
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Withdrawn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
EP86109152A
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German (de)
English (en)
French (fr)
Inventor
Michael Schall
Jürgen Dittrich
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.)
Bieler and Lang GmbH
Original Assignee
Bieler and Lang 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 Bieler and Lang GmbH filed Critical Bieler and Lang GmbH
Publication of EP0209771A1 publication Critical patent/EP0209771A1/de
Withdrawn legal-status Critical Current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
    • F23N5/006—Systems for controlling combustion using detectors sensitive to combustion gas properties the detector being sensitive to oxygen
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2223/00—Signal processing; Details thereof
    • F23N2223/08—Microprocessor; Microcomputer
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2223/00—Signal processing; Details thereof
    • F23N2223/48—Learning / Adaptive control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2227/00—Ignition or checking
    • F23N2227/20—Calibrating devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2231/00—Fail safe
    • F23N2231/10—Fail safe for component failures
    • 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
    • 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
    • F23N2235/06—Air or combustion gas valves or dampers at the air intake
    • 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
    • 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
    • F23N2235/18—Groups of two or more valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2237/00—Controlling
    • F23N2237/24—Controlling height of burner
    • F23N2237/26—Controlling height of burner oxygen-air ratio

Definitions

  • the invention relates to a method and an arrangement for fine regulation of the fuel flow rate by means of a fine regulator in burner-operated combustion plants for fossil fuels, in particular in a fuel regulator as a shunt line next to the main regulator, by measuring the residual oxygen content of the exhaust gases Exhaust gas containing CO is used.
  • the actuator works as an independent main air flow follower depending on the residual oxygen.
  • the position of the main fuel flow controller influences the above-mentioned run-on only through the burnout or the resulting lack of air or excess air.
  • DE-OS 34 35 902 describes a control system for the automatic control of the excess air or oxygen during combustion of flowing fuels.
  • the fuel is controlled with a control valve and an adjusting device.
  • the combustion air is also regulated by an air flap which is actuated by an actuating device. Both variables are controlled via a special control system with a control device which is connected to the two actuating devices via a line.
  • the setpoint value of the fuel: air ratio is set by an auxiliary control system in accordance with the development of unburned fuel during combustion. This is to ensure that the combustion is carried out with the smallest possible excess of air or oxygen and at the same time the formation of noteworthy unburned gas components, such as carbon monoxide and hydrocarbons, is excluded.
  • the present invention has for its object to provide a method of the type mentioned that enables the problem-free control of a residual oxygen-guided fine flow controller in order to enable a minimal pollutant effect with the best thermal utilization.
  • the microprocessor of the fine control should automatically enable the fine control of the fuel flow after a completed training program that is specific to each system.
  • a method of the type mentioned is specified, which is characterized in that by means of a microprocessor connected to the fine controller by a software routine and by means of a CO monitor with a corresponding interface to a respective burner mixing head and to a respective one set burn-out air volume, real carbon monoxide concentration (ppm) is read in, the microprocessor undergoing a learning phase when the burner is started for the first time, in such a way that when it is started for the first time using a CO measuring device, the CO value and an O2 measuring probe the O2 value is measured continuously and the initially controlled quantity fine flow controller is raised step by step until the CO content increases sharply, the associated O2 value being stored in the RAM memory of the microprocessor, whereupon the next load level is defined by a defined setting of the fuel Main air regulator nec is selected and the microprocessor now takes up the next step by repeating the above steps until the complete recording and storage of the burnout characteristic curve typical for the burner is stored in the RAM memory of the microprocessor.
  • ppm real carbon monoxid
  • Another advantage of the solution according to the invention consists in the resolution of the combustion performance-dependent burnout characteristic of a system under consideration that can be used with any number of calibration points.
  • the invention further relates to an arrangement for performing the method according to the invention, which is characterized by a servomotor-driven fine flow controller, which is arranged in a shunt circuit of the fuel supply of the burner and is controlled by a microprocessor, which with an O2 probe and with a transmitter element for each driven load level is connected.
  • a servomotor-driven fine flow controller which is arranged in a shunt circuit of the fuel supply of the burner and is controlled by a microprocessor, which with an O2 probe and with a transmitter element for each driven load level is connected.
  • the microprocessor computing unit essentially consists of a CPU logic including A / D converter and D / A converter, the task of which is to use a bidirectional bus system and associated I / O port from the C0 measuring device connected during the learning process, The festival Process connected O2 probe electronics and the load stage transmitter data so that a defined reference variable is created as a manipulated variable for the volume fine-current controller, the CPU logic using a battery-buffered RAM working memory for storing the O2 values resulting from the learning cycle and ROM containing operating software - Memory and different timers.
  • the main advantage of the method according to the invention and the arrangement for carrying out the method is that, without manual intervention, the microprocessor for each system and any adjustable load range is always specific to the system, by carrying out the learning phase, the desired, optimal conditions with the best thermal utilization and minimal oxygen emissions determined and carries out the corresponding fine adjustment of the fuel flow.
  • the method according to the invention thus relates to a burnout control with continuous O2 measurement, an automatic self-optimization process, also called the learning phase, being initiated during the initial start-up by means of a CO probe. With this learning phase, the system-specific limit stoichiometry is sought, and only then is the required O2 allowance requested.
  • the combustion system consists of a combustion chamber 1 with a burner 2, to which the air is fed via a feed 3 and the fuel, for example oil or gas, is fed via the line 4.
  • the fuel for example oil or gas
  • a flap 6 controlled by an actuator 5 is arranged in the air supply 3, the actuator 5 also controlling the main fuel regulator 7 in the feed line 4.
  • the main component of the arrangement according to the invention is the shunt line 8, which bridges the regulator 7 in the feed line 4 and in which a quantity fine flow regulator 9 is connected, which is connected to the microprocessor 10 described in FIG. 2.
  • the microprocessor computing unit 10 is also connected to an O2 probe 11 and is connected via a further line 12 to a load stage transmitter element 13, which is coupled to the servomotor 5.
  • the microprocessor essentially consists of the CPU unit 14, which is connected via a BUS 15 to an I / O port 16, an A / D converter 17, a display module 18, a probe electronics 19 and a D / A converter 20 is connected.
  • the CPU unit is further connected to a battery-buffered RAM 21, a ROM 22 and possibly a "watchdog" 23.
  • the A / D converter 17 can be connected to a CO measuring device 24 during the learning phase.
  • the angular position or the power of the burner is recorded via the transmitter element 25.
  • the O2 probe 11 is connected via the probe electronics 19 to the output port 28.
  • the measured O2 concentration is read in via the bus system 15.
  • the specification of the minimum and maximum permissible control deviation is shaped with the actuators 26 and 27.
  • the port 16 is provided with a wide variety of inputs and outputs, which are connected to the following organs in order to fulfill the task: quantity fine flow controller, burner, automatic burner control, timing elements, air performance level, burner motor, alarm output, mode switch "Learn-Execute", Display module and other paths if necessary.
  • FIG 3 shows the flowchart for controlling the microprocessor during the learning phase.
  • the release for the O2 control is determined by a delayed timer 29.
  • This timer must be adjustable in order to do justice to the peculiarities of the respective firing systems.
  • the microprocessor continuously queries the operating status of the burner and compares the O2 value before and after the flame is formed. During the pre-ventilation phase ( ⁇ 30 sec.) And after the above-mentioned tightening delay (10 ⁇ 25 sec.) It is checked whether the acid substance content in the exhaust gas collector is at least 20 vol.%. Flame formation must occur no later than one second after opening the fuel valve. When the fuel valve is opened, another time routine of approx.
  • the volume fine flow controller will react to every change in the angle setting (driven burner output) and to any spread of the fuel calorific value (kW / m3) by correspondingly opening or closing its actuator, so that the residual oxygen concentration in any case within that with the actuators 26, 27 characterized hysteresis remains and is in coincidence with the burnout characteristic curve that has been mathematically optimized during the learning phase.
  • the encoder element 25 is to be monitored for a wire break and short circuit and the presence of one of these errors is indicated via the display module 18 while a fault message is activated at the same time.
  • the learning process of the controller according to the method according to the invention proceeds as follows.
  • the microprocessor computing unit is activated when the Brenner underwent a learning phase.
  • the CO contained in the exhaust gas serves as a parameter for evaluating the material turnover.
  • the CO value is continuously measured by means of the CO measuring device 24, the analog output of which is digitized in the A / D converter, and the O2 value is measured continuously by means of the O2 probe 11, the microprocessor initially initializing the fine flow rate controller 9, ie that the burner works with the excess air characterized by the main fuel-air regulator.
  • the volume fine flow controller is now opened step by step until the CO content increases significantly.
  • the corresponding O2 value is stored in RAM 21.
  • the next load level is selected by a defined setting of the main fuel-air controller, and the microprocessor now takes up the next level by repeating the above steps.
  • the curve is provided with an adapted aviation security surcharge so that the lambda value remains within an optimal hysteresis during adjustment processes.
  • the display module 18 shows how many setpoints have been specified and which are currently being learned, whereby the setpoint and actual values or the read-in value, the arithmetically determined value and the residual oxygen content present during normal operation of the burner can be displayed.
  • the mode of operation of the main fuel-air regulator is not touched and that the O2 control carries out an autonomous fine adjustment in the direction of maximum combustion quality.
  • FIG. 3 shows an embodiment of the computer program by executing the method according to the invention.

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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)
EP86109152A 1985-07-24 1986-07-04 Verfahren und Anordnung zur Feinregulierung des Brennstoffmengenstromes an brennerbetriebenen Feuerungsanlagen durch Messung des Restsauerstoffes und des Kohlenmonoxidgehaltes in den Abgasen Withdrawn EP0209771A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853526384 DE3526384A1 (de) 1985-07-24 1985-07-24 Verfahren und anordnung zur feinregulierung des brennstoffmengenstromes an brennerbetriebenen feuerungsanlagen durch messung des restsauerstoffes und des kohlenmonoxidgehaltes in den abgasen
DE3526384 1985-07-24

Publications (1)

Publication Number Publication Date
EP0209771A1 true EP0209771A1 (de) 1987-01-28

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EP86109152A Withdrawn EP0209771A1 (de) 1985-07-24 1986-07-04 Verfahren und Anordnung zur Feinregulierung des Brennstoffmengenstromes an brennerbetriebenen Feuerungsanlagen durch Messung des Restsauerstoffes und des Kohlenmonoxidgehaltes in den Abgasen

Country Status (2)

Country Link
EP (1) EP0209771A1 (enrdf_load_stackoverflow)
DE (1) DE3526384A1 (enrdf_load_stackoverflow)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0655583A1 (de) * 1993-11-29 1995-05-31 ABBPATENT GmbH Verfahren zur Regelung und Überwachung
WO1996025628A1 (en) * 1995-02-16 1996-08-22 British Gas Plc Apparatus for providing an air/fuel mixture to a fully premixed burner
WO1996025626A1 (en) * 1995-02-16 1996-08-22 British Gas Plc Apparatus for providing an air/fuel mixture to a fully premixed burner
WO1996025627A1 (en) * 1995-02-16 1996-08-22 British Gas Plc Apparatus for providing an air/fuel mixture to a fully premixed burner
DE19749506C1 (de) * 1997-11-08 1999-01-07 Hartmuth Dipl Phys Dambier Verfahren zur laufenden Optimierung der Luftzufuhr bei Feuerungsanlagen
DE19923059A1 (de) * 1999-05-20 2000-12-07 Steag Ag Verfahren zum Regeln eines Verbrennungsprozesses
WO2001098711A1 (de) * 2000-06-19 2001-12-27 Honeywell B.V. Regelungsverfahren für gasbrenner
EP1239220A3 (de) * 2001-03-08 2002-10-30 Robert Bosch Gmbh Gasverbrennungsgerät, insbesondere Gasheizgerät
EP1467149A1 (de) * 2003-04-11 2004-10-13 E.ON Ruhrgas AG Verfahren zum Überwachen der Verbrennung in einer Verbrennungseinrichtung
AT412903B (de) * 2000-10-02 2005-08-25 Herz Feuerungstechnik Ges M B Verfahren zur steuerung bzw. regelung von feuerungsanlagen sowie danach regelbare feuerungsanlage
DE102004013971A1 (de) * 2004-03-19 2005-10-06 Rational Ag Brennereinrichtung für ein Gargerät und Gargerät mit solch einer Brennereinrichtung
EP3156729A3 (de) * 2015-10-12 2017-04-26 MHG Heiztechnik GmbH Verfahren zur nachkalibrierung einer brennervorrichtung für flüssigbrennstoffe
EP3156730A3 (de) * 2015-10-12 2017-08-16 MHG Heiztechnik GmbH Verfahren zur kalibrierung einer brennervorrichtung für flüssigbrennstoffe

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3610363A1 (de) * 1986-03-27 1987-10-01 Kernforschungsz Karlsruhe Verfahren zum kontinuierlichen ueberwachen von konzentrationen von gasfoermigen bestandteilen in gasgemischen, ausgenommen o(pfeil abwaerts)2(pfeil abwaerts)
CH671823A5 (enrdf_load_stackoverflow) * 1987-03-13 1989-09-29 Landis & Gyr Ag
EP0339135A1 (de) * 1988-04-25 1989-11-02 Landis & Gyr Betriebs AG Verbundsteuereinrichtung für einen Brenner
DE4428952C2 (de) * 1994-08-16 1998-07-09 Lamtec Mes Und Regeltechnik Fu Verfahren und Vorrichtung zur Regelung und Überwachung der Verbrennung einer Feuerungsanlage
DE10220774B4 (de) * 2002-05-10 2004-06-24 Robert Bosch Gmbh Einrichtung zur Regelung eines Brenners
AT413440B (de) * 2003-10-08 2006-02-15 Vaillant Gmbh Verfahren zur anpassung des brenngas-luft- verhältnisses an die gasart bei einem gasbrenner

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0040736A1 (de) * 1980-05-22 1981-12-02 Siemens Aktiengesellschaft Verfahren zum Betrieb einer Vergasungsbrenner/Heizkesselanlage
EP0050840A1 (de) * 1980-10-23 1982-05-05 Karl Dungs GmbH & Co. Verfahren zur Einstellung von Verbundreglern für Brenner in Wärmeerzeugungsanlagen
DE3331625A1 (de) * 1982-09-03 1984-03-15 Hitachi, Ltd., Tokyo Diagnoseverfahren fuer den verbrennungszustand in einem ofen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0040736A1 (de) * 1980-05-22 1981-12-02 Siemens Aktiengesellschaft Verfahren zum Betrieb einer Vergasungsbrenner/Heizkesselanlage
EP0050840A1 (de) * 1980-10-23 1982-05-05 Karl Dungs GmbH & Co. Verfahren zur Einstellung von Verbundreglern für Brenner in Wärmeerzeugungsanlagen
DE3331625A1 (de) * 1982-09-03 1984-03-15 Hitachi, Ltd., Tokyo Diagnoseverfahren fuer den verbrennungszustand in einem ofen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENTS ABSTRACTS OF JAPAN, Band 9, Nr. 11 (M-351)[1734], 18. Januar 1985; & JP-A-59 158 913 (CHIYUUGAI RO KOGYO K.K.) 08-09-1984 *

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0655583A1 (de) * 1993-11-29 1995-05-31 ABBPATENT GmbH Verfahren zur Regelung und Überwachung
DE4340534A1 (de) * 1993-11-29 1995-06-01 Abb Patent Gmbh Verfahren zur Regelung und Überwachung
WO1996025628A1 (en) * 1995-02-16 1996-08-22 British Gas Plc Apparatus for providing an air/fuel mixture to a fully premixed burner
WO1996025626A1 (en) * 1995-02-16 1996-08-22 British Gas Plc Apparatus for providing an air/fuel mixture to a fully premixed burner
WO1996025627A1 (en) * 1995-02-16 1996-08-22 British Gas Plc Apparatus for providing an air/fuel mixture to a fully premixed burner
US5984664A (en) * 1995-02-16 1999-11-16 Bg Plc Apparatus for providing an air/fuel mixture to a fully premixed burner
DE19749506C1 (de) * 1997-11-08 1999-01-07 Hartmuth Dipl Phys Dambier Verfahren zur laufenden Optimierung der Luftzufuhr bei Feuerungsanlagen
DE19923059A1 (de) * 1999-05-20 2000-12-07 Steag Ag Verfahren zum Regeln eines Verbrennungsprozesses
WO2001098711A1 (de) * 2000-06-19 2001-12-27 Honeywell B.V. Regelungsverfahren für gasbrenner
AT412903B (de) * 2000-10-02 2005-08-25 Herz Feuerungstechnik Ges M B Verfahren zur steuerung bzw. regelung von feuerungsanlagen sowie danach regelbare feuerungsanlage
EP1239220A3 (de) * 2001-03-08 2002-10-30 Robert Bosch Gmbh Gasverbrennungsgerät, insbesondere Gasheizgerät
EP1467149A1 (de) * 2003-04-11 2004-10-13 E.ON Ruhrgas AG Verfahren zum Überwachen der Verbrennung in einer Verbrennungseinrichtung
DE102004013971A1 (de) * 2004-03-19 2005-10-06 Rational Ag Brennereinrichtung für ein Gargerät und Gargerät mit solch einer Brennereinrichtung
DE102004013971B4 (de) * 2004-03-19 2008-07-17 Rational Ag Brennereinrichtung für ein Gargerät und Gargerät mit solch einer Brennereinrichtung
EP3156729A3 (de) * 2015-10-12 2017-04-26 MHG Heiztechnik GmbH Verfahren zur nachkalibrierung einer brennervorrichtung für flüssigbrennstoffe
EP3156730A3 (de) * 2015-10-12 2017-08-16 MHG Heiztechnik GmbH Verfahren zur kalibrierung einer brennervorrichtung für flüssigbrennstoffe

Also Published As

Publication number Publication date
DE3526384A1 (de) 1987-02-12
DE3526384C2 (enrdf_load_stackoverflow) 1989-12-07

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