EP0231705B1 - Vorrichtung zur Überwachung der Arbeitsweise eines Heizkessels - Google Patents

Vorrichtung zur Überwachung der Arbeitsweise eines Heizkessels Download PDF

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Publication number
EP0231705B1
EP0231705B1 EP86402905A EP86402905A EP0231705B1 EP 0231705 B1 EP0231705 B1 EP 0231705B1 EP 86402905 A EP86402905 A EP 86402905A EP 86402905 A EP86402905 A EP 86402905A EP 0231705 B1 EP0231705 B1 EP 0231705B1
Authority
EP
European Patent Office
Prior art keywords
probe
combustion
pipe
gas
installation
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.)
Expired - Lifetime
Application number
EP86402905A
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English (en)
French (fr)
Other versions
EP0231705A1 (de
Inventor
Gérald Brunel
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.)
SOCIETE D'ETUDE ET DE CONSTRUCTION DE CHAUDIERES A
Original Assignee
D'ETUDE ET DE CONSTRUCTION DE CHAUDIERES AUTOMATIQUES EN ACIER SECCACIER Ste
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 D'ETUDE ET DE CONSTRUCTION DE CHAUDIERES AUTOMATIQUES EN ACIER SECCACIER Ste filed Critical D'ETUDE ET DE CONSTRUCTION DE CHAUDIERES AUTOMATIQUES EN ACIER SECCACIER Ste
Priority to AT86402905T priority Critical patent/ATE73534T1/de
Publication of EP0231705A1 publication Critical patent/EP0231705A1/de
Application granted granted Critical
Publication of EP0231705B1 publication Critical patent/EP0231705B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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

Definitions

  • the present invention relates to an installation for monitoring the operation of a boiler, intended to detect all the major disturbances in the boiler, the causes of which may be insufficiently oxidative combustion.
  • This protective installation is only intended to monitor the extinction of the burner flame to detect the excessive presence of oxidizing gas in the fireplace or outside and order the closing of the gas valve.
  • This installation which has no function to control the oxidizing or reducing state of combustion fumes, has no simulation chamber.
  • EP-A-0 221 799 which constitutes the state of the art according to article 54 (3) EPC, to regulate the combustion of a burner by making a sample combustion of a stoichiometric mixture formed by taking combustion air and combustible gas according to previously determined ratios, in the air and gas stream supplying the burner, this sample combustion being monitored by a probe.
  • the present invention proposes to create an installation for monitoring operation a boiler making it possible to check that the combustion is not highly disturbed and to check the good operating condition of the probe performing this monitoring.
  • the present invention relates to an installation for monitoring the proper functioning of a boiler, according to the preamble of the first claim and characterized by the means set out in the characterizing part of the first claim.
  • the installation according to the invention controls the nature of the combustion of a burner by simulating combustion in a simulation chamber using the same combustion gas and the same combustion air, supplied to this combustion chamber by l 'intermediate of pipes providing a calibrated flow.
  • the result of this simulated combustion is detected by the probe, the proper functioning of which is checked by passing the smoke from the hearth over the probe through the intermittent opening of the solenoid valve of the pipe connected to the suction side of the fan by the intermediate of the simulation chamber.
  • the gas supplied by the burner supply pipe is partly diverted to the simulation chamber by the corresponding pipe.
  • the same is true for a fraction of combustion air derived from the pipe through the air intake pipe.
  • the gas and air pressure in the pipes is sufficient, combined with the vacuum prevailing in the hearth, to circulate the gas and the combustion air, then the fumes of the simulated combustion from the chamber to the hearth.
  • the probe By intermittently injecting, preferably regularly, a small amount of gas, the probe is toggled between its low state and its high state.
  • the intermittent signal supplied by the probe can be integrated by the control circuit which, in the event of normal operation, transmits a corresponding signal and, in the event of abnormal operation, puts the boiler in safety, i.e. stops by prohibiting restart except by manual intervention.
  • the probe does not provide signals during gas injection, this means either that the probe is out of order, or that the servo motor supplying the fluid (gas, air) did not respond to the signals control.
  • control circuit confirms that the probe is in normal operating state, but if the probe provides a signal indicating a malfunction of the boiler, this signal is interpreted as such.
  • the analysis probe is preferably an oxygen probe, with zirconium; it can also be other sensors and probes as well as combinations probes and sensors for detecting unburnt gases, such as, for example, catarometric probes making it possible to detect a highly disordered combustion emitting unburnt gases due to an air defect or an exaggerated excess of air.
  • the installation according to the invention can be used independently or in combination with a usual flame monitoring device, on new boilers, but also on already existing boilers.
  • the installation can also be used in reverse conditions to control reductive combustion.
  • the periodic injection of gas is replaced by an injection of air.
  • the figure shows the installation for controlling the operation of a boiler of which only the burner 1 has been shown with its gas supply pipe 2 provided with a valve 3 and its supply pipe 4 with air supplied by a fan 5 and a hearth 6.
  • the installation comprises a gas intake 7 connected to the gas pipe 2, a combustion air intake 8 connected to the combustion air line 4 and a simulation chamber 9 in which a stoichiometric combustion is simulated which is detected by a probe 10 placed in the outlet pipe 11 opening into the hearth 6.
  • This combustion monitoring installation detects combustion by the probe 10 and regulates the gas supply via the valve 3 controlled by the circuit of control 12 so that the combustion in the hearth 6 takes place according to the fixed conditions (oxidizing combustion or reducing combustion).
  • the monitoring installation consists of a pipe 13 connected to the suction of the blowing machine 5 and provided with a valve 14 controlled by a control circuit 15.
  • the pipe 13 comprises a diaphragm 16 adapting the pressure drop in the blowing machine 5.
  • the dimensioning of the various pipes 7, 8, 11, 13 and of the diaphragm 16 is such that when the valve 14 is open, the installation operates by sucking smoke from the hearth 6 through the pipe 11 to check that the smoke atmosphere is good. This verification is done intermittently according to a periodicity adjusted by the control system 12 possibly integrated into the circuit 15 for controlling the valve 14.
  • the control probe can be used to periodically detect poor combustion in the fireplace. To do this, it is constantly checked during operation of the regulator that the probe is in good condition by ensuring that it switches regularly between its two states. If not, this means either that the sensor is out of service, or that the regulator or its motors are malfunctioning. In both cases, the boiler and its burner are locked out. Periodically, if the probe and the regulator are working, the valve is open to allow the extraction of smoke from the fireplace (the regulator is then stopped) and it is checked that the smoke is oxidizing. If not, we put the system in safety.
  • the installation controls the nature of the combustion of a burner by simulating combustion in a simulation chamber 9 using the same oxidizing gas and the same combustion air supplied to this combustion chamber. by means of pipes providing a calibrated flow. The result of this simulation combustion is detected by the probe 10.
  • Verification of the proper functioning of the probe 10 associated with the simulation chamber is carried out by passing the smoke from the hearth 6 over the probe 10 by the intermittent opening of the solenoid valve 14 of the pipe 13 connected to the suction side of the fan. 5 via the simulation chamber 9.
  • the gas from the supply pipe 2 of the burner is partially diverted to the simulation chamber 9 via the corresponding pipe 7. It is the same for a fraction of combustion air derived from the pipe 4 through the air intake pipe 8.
  • the gas and air pressures in the pipes 7, 8 are sufficient, combined with the vacuum reigning in foyer 6 to circulate the gas and the combustion air then the fumes from the simulated combustion from the chamber 9 to the hearth 6.
  • the circulation is done in reverse: the vacuum created in the air line 13 by the fan 5 draws fumes from the hearth 6 through the line 11 to pass them over the probe. analysis 10. It does not matter that at this time, gas and air are also sucked towards the pipe 13 from the pipes 7 and 8 connected to the chamber 9 since the suction pipe 13 does not include a probe .
  • the installation according to the invention can be used independently or associated with a usual flame monitoring device.
  • the installation can also be used to control a reduction type combustion, in which case the periodic injection of gas is replaced by an injection of air.

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)
  • Control Of Steam Boilers And Waste-Gas Boilers (AREA)
  • Sampling And Sample Adjustment (AREA)

Claims (4)

  1. Vorrichtung zur Überwachung der einwandfreien Arbeitsweise eines Kessels, der mit einem gasversorgten (2) Brenner (1) ausgerüstet ist, dessen Gaszuleitung über ein geregeltes Ventil (3) erfolgt und zur Verbrennung erforderliche Luft über einen Lüfter (5) zuführbar ist, wobei die Vorrichtung eine Sonde zur Durchführung von Analysen umfaßt, die mit einem Steuerkreis (12) des Gasventils (3) verbunden ist, dessen Arbeitsweise kontrolliert werden kann,
    gekennzeichnet durch
    - eine Kammer (9) für die Simulation von Verbrennungsvorgängen verbunden über eine Gasanschlußsstelle (7) mit der Gaszuleitung und über eine Luftansaugöffnung (8) am Ausgang (4) des Lüfters, der den Brenner (1) mit der notwendigen Luft versorgt, um einen Verbrennungsvorgang zu simulieren, bei dem die entstehenden Gase durch die in einer die Kammer (9) mit dem Brennraum (6) des Kessels verbindenden Leitung (11) angeordnete Sonde analysierbar sind,
    - eine Leitung (13), die die Simulationskammer (9) mit der Ansaugseite der Pumpe (5) verbindet, wobei die Leitung (13) mit einem an einen Steuerkreis (15) angeschlossenen Ventil (14) versehen ist, welches normalerweise geschlossen und intermittierend derart geregelt wird, daß die Zuleitung (13) freigebbar ist und das Ansaugen des von dem Brennraum ausgehenden Rauchs über die Zuleitungen (11) und (13) ermöglicht und den Rauch über die Sonde (10) leitet, wobei die Sonde (10) zur Überprüfung der einwandfreien Funktion des Vorgangs eingeschaltet wird.
  2. Vorrichtung zur Überwachung nach Anspruch 1,
    dadurch gekennzeichnet,
    daß die Analysensonde (10) eine Sauerstoffsonde aus Zirkonium ist.
  3. Vorrichtung zur Überwachung nach Anspruch 1,
    dadurch gekennzeichnet,
    daß die Sonde (10) derart ausgelegt ist, daß der oxidierende oder reduzierende Zustand des zu analysierenden Gases detektierbar ist.
  4. Vorrichtung nach Anspruch 1,
    dadurch gekennzeichnet,
    daß die Vorrichtung eine Überprüfungseinrichtung der regelmäßigen Unschaltung der Sonde in einer vorgegebenen Zeit aufweist, wenn diese regulierend arbeitet.
EP86402905A 1985-12-31 1986-12-23 Vorrichtung zur Überwachung der Arbeitsweise eines Heizkessels Expired - Lifetime EP0231705B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86402905T ATE73534T1 (de) 1985-12-31 1986-12-23 Vorrichtung zur ueberwachung der arbeitsweise eines heizkessels.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8519491 1985-12-31
FR8519491A FR2592465B1 (fr) 1985-12-31 1985-12-31 Installation de surveillance du fonctionnement d'une chaudiere

Publications (2)

Publication Number Publication Date
EP0231705A1 EP0231705A1 (de) 1987-08-12
EP0231705B1 true EP0231705B1 (de) 1992-03-11

Family

ID=9326364

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86402905A Expired - Lifetime EP0231705B1 (de) 1985-12-31 1986-12-23 Vorrichtung zur Überwachung der Arbeitsweise eines Heizkessels

Country Status (5)

Country Link
US (1) US4698015A (de)
EP (1) EP0231705B1 (de)
AT (1) ATE73534T1 (de)
DE (1) DE3684296D1 (de)
FR (1) FR2592465B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101504151B (zh) * 2008-12-19 2011-02-16 惠德时代能源科技(北京)有限公司 锅炉含氧量测试系统的安装工艺

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2607905B1 (fr) * 1986-12-05 1990-01-26 Pramata Dispositif de verification de l'etat des fumees d'un generateur de chaleur ou de force brulant un combustible
FR2609154A1 (fr) * 1986-12-29 1988-07-01 Pramata Dispositif de regulation de la combustion, notamment de la teneur en oxygene des fumees de combustion par un bruleur a air souffle, procede de mise en oeuvre et bruleur equipe d'un tel dispositif
FR2609155B1 (fr) * 1986-12-30 1989-08-18 Pramata Dispositif de regulation de la teneur en oxygene de fumees de combustion
DE3705334A1 (de) * 1987-01-28 1988-08-11 Landis & Gyr Ag Durchsaugeinrichtung fuer gassensoren in heizungsanlagen
GB2410075B (en) * 2001-07-12 2005-11-16 Luke Chamberlain Boiler unit with remote management system
US20070269755A2 (en) * 2006-01-05 2007-11-22 Petro-Chem Development Co., Inc. Systems, apparatus and method for flameless combustion absent catalyst or high temperature oxidants
WO2010062287A1 (en) * 2008-11-25 2010-06-03 Utc Fire & Security Corporation Oxygen trim controller tuning during combustion system commissioning
US9835265B2 (en) 2011-12-15 2017-12-05 Honeywell International Inc. Valve with actuator diagnostics
US9995486B2 (en) 2011-12-15 2018-06-12 Honeywell International Inc. Gas valve with high/low gas pressure detection
US9846440B2 (en) 2011-12-15 2017-12-19 Honeywell International Inc. Valve controller configured to estimate fuel comsumption
US9851103B2 (en) 2011-12-15 2017-12-26 Honeywell International Inc. Gas valve with overpressure diagnostics
US10422531B2 (en) 2012-09-15 2019-09-24 Honeywell International Inc. System and approach for controlling a combustion chamber
US9234661B2 (en) * 2012-09-15 2016-01-12 Honeywell International Inc. Burner control system
US10564062B2 (en) 2016-10-19 2020-02-18 Honeywell International Inc. Human-machine interface for gas valve
US11073281B2 (en) 2017-12-29 2021-07-27 Honeywell International Inc. Closed-loop programming and control of a combustion appliance

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DE1253205B (de) * 1963-06-01 1967-11-02 Bbc Brown Boveri & Cie Elektrische UEberwachungseinrichtung fuer Gasfeuerungsanlagen

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DE2460066C3 (de) * 1974-12-19 1981-08-06 Brown, Boveri & Cie Ag, 6800 Mannheim Verfahren und Vorrichtung zum selbsttätigen Regeln des Brenstoff-Luftverhältnisses einer Verbrennung
JPS5630533A (en) * 1979-08-20 1981-03-27 Rinnai Corp Safety device for combustion system
DE3028665A1 (de) * 1980-07-29 1982-02-25 Brown, Boveri & Cie Ag, 6800 Mannheim Einrichtung mit einem sauerstoff-messfuehler
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JPS59180218A (ja) * 1983-03-30 1984-10-13 Babcock Hitachi Kk 燃焼制御装置
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Publication number Priority date Publication date Assignee Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101504151B (zh) * 2008-12-19 2011-02-16 惠德时代能源科技(北京)有限公司 锅炉含氧量测试系统的安装工艺

Also Published As

Publication number Publication date
EP0231705A1 (de) 1987-08-12
FR2592465B1 (fr) 1988-03-25
ATE73534T1 (de) 1992-03-15
FR2592465A1 (fr) 1987-07-03
US4698015A (en) 1987-10-06
DE3684296D1 (de) 1992-04-16

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