EP0231705B1 - Monitoring device for boiler functions - Google Patents
Monitoring device for boiler functions Download PDFInfo
- 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
Links
Images
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)
- Sampling And Sample Adjustment (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
Description
La présente invention concerne une installation de surveillance du fonctionnement d'une chaudière, destinée à détecter tous les forts dérèglements de la chaudière dont les causes peuvent être une combustion pas assez oxydante.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.
Lorsqu'une chaudière fonctionne dans des conditions trop oxydantes, cela pénalise le rendement de la combustion et diminue la puissance que peut fournir la chaudière. Un tel mauvais fonctionnement n'est pas gênant pour la sécurité de la chaudière. Il n'entraîne pratiquement pas de problèmes de pollution car les imbrûlés tels que CO sont en quantités relativement faibles.When a boiler operates in excessively oxidizing conditions, this penalizes the combustion efficiency and reduces the power that the boiler can provide. Such a malfunction is not a problem for the safety of the boiler. It practically does not cause pollution problems because unburnt materials such as CO are in relatively small quantities.
Par contre, lorsqu'une chaudière est fortement déréglée et que la combustion n'est pas assez oxydante ou réductrice, les conséquences sont beaucoup plus gênantes et peuvent être plus graves. En effet, des imbrûlés apparaissent dans les fumées, ce qui se traduit par des inconvénients au niveau de la sécurité et de la pollution. Il y a dans ces conditions accumulation d'oxyde de carbone CO, une pollution par l'oxyde de carbone et les autres imbrûlés, ainsi qu'un risque d'encrassement de la chaudière par le dépôt des suies. Les dispositifs de sécurité connus ne vérifient que la présence de la flamme et non la qualité de la combustion.On the other hand, when a boiler is highly disordered and that the combustion is not sufficiently oxidizing or reducing, the consequences are much more troublesome and can be more serious. Indeed, unburnt matter appears in the fumes, which results in drawbacks in terms of safety and pollution. In these conditions, there is accumulation of carbon monoxide CO, pollution by carbon monoxide and other unburnt substances, as well as a risk of fouling of the boiler by the deposition of soot. Known safety devices only check the presence of the flame and not the quality of combustion.
Il est connu (DE-B-1 253 205) une installation électrique de surveillance d'un brûleur à gaz ou d'une chaudière à brûleur à gaz. L'installation comporte un tube de prélèvement de fumées du foyer et un tube de prélèvement de l'air ambiant, reliés à un analyseur de gaz qui commande l'arrêt de la combustion par la fermeture de la vanne suivant l'état du gaz analysé.It is known (DE-B-1 253 205) an electrical installation for monitoring a gas burner or a gas burner boiler. The installation comprises a tube for sampling smoke from the fireplace and a tube for sampling ambient air, connected to a gas analyzer which controls the stopping of combustion by closing the valve according to the state of the gas analyzed. .
Cette installation de protection est seulement destinée à surveiller l'extinction de la flamme du brûleur pour détecter la présence excessive de gaz comburant dans le foyer ou à l'extérieur et commander la fermeture de la vanne de gaz. Cette installation qui n'a aucune fonction de contrôle de l'état oxydant ou réducteur des fumées de combustion n'a pas de chambre de simulation.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.
Il est également connu de EP-A-0 221 799, qui constitue l'état de le technique selon l'article 54 (3) CBE, de réguler la combustion d'un brûleur en faisant une combustion échantillon d'un mélange stoechiométrique formé par le prélèvement d'air comburant et de gaz combustible selon des rapports préalablement déterminés, dans la veine d'air et celle de gaz alimentant le brûleur, cette combustion échantillon étant surveillée par une sonde.It is also known from 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.
Toutefois cette régulation connue est destinée à réguler une combustion quelconque et par ailleurs rien ne permet de vérifier le bon fonctionnement de la sonde. Or une sonde est un moyen de détection particulièrement sensible et de ce fait susceptible de mal fonctionner.However, this known regulation is intended to regulate any combustion and furthermore nothing makes it possible to verify the proper functioning of the probe. Now a probe is a particularly sensitive means of detection and therefore liable to malfunction.
La présente invention se propose de créer une installation de surveillance du fonctionnement d'une chaudière permettant de vérifier que la combustion n'est pas fortement déréglée et de contrôler le bon état de fonctionnement de la sonde effectuant cette surveillance.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.
A cet effet, la présente invention concerne une installation de surveillance du bon fonctionnement d'une chaudière, selon la preamble de la première revendication et caractérisée par les moyens énoncés dans la partie caractérisante de la première revendication.To this end, 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.
Ces moyens généraux sont complétés par d'autres moyens objet des autres revendications.These general means are supplemented by other means which are the subject of the other claims.
Ainsi, l'installation selon l'invention contrôle la nature de la combustion d'un brûleur en simulant une combustion dans une chambre de simulation à l'aide du même gaz comburant et du même air comburant, fournis à cette chambre de combustion par l'intermédiaire de conduites fournissant un débit calibré. Le résultat de cette combustion de simulation est détecté par la sonde dont le bon fonctionnement est vérifié en faisant passer sur la sonde les fumées du foyer par l'ouverture intermittente de l'électrovanne du tuyau relié au côté d'aspiration du ventilateur par l'intermédiaire de la chambre de simulation.Thus, 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.
En fonctionnement normal, c'est-à-dire entre les contrôles intermittents, le gaz fourni par le tuyau d'alimentation du brûleur est dérivé en partie vers la chambre de simulation par la conduite correspondante. Il en est de même d'une fraction d'air comburant dérivé de la conduite à travers la conduite de prélèvement d'air. La pression du gaz et de l'air dans les conduites est suffisante, combinée à la dépression régnant dans le foyer, pour faire circuler le gaz et l'air comburant, puis les fumées de la combustion de simulation de la chambre vers le foyer.In normal operation, that is to say between the intermittent checks, 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.
En injectant par intermittence, de préférence de façon régulière, une petite quantité de gaz, on fait basculer la sonde entre son état bas et son état haut. Le signal intermittent fourni par la sonde peut être intégré par le circuit de contrôle qui, en cas de fonctionnement normal, transmet un signal correspondant et, en cas de fonctionnement anormal, met la chaudière en sécurité, c'est-à-dire l'arrête en interdisant le redémarrage sauf par une intervention manuelle.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.
Si la sonde ne fournit pas de signaux lors de l'injection de gaz, cela signifie soit que la sonde est hors d'usage, soit que le moteur d'asservissement fournissant le fluide (gaz, air) n'a pas répondu aux signaux de commande.If 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.
Par contre, si le circuit de contrôle confirme que la sonde est en état de fonctionnement normal, mais si la sonde fournit un signal traduisant un mauvais fonctionnement de la chaudière, ce signal est interprété comme tel.On the other hand, if the 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.
Pour le contrôle intermittent, la circulation se fait de manière inverse : la dépression créée dans la conduite d'air par le ventilateur aspire des fumées du foyer à travers la conduite pour les faire passer sur la sonde d'analyse. Il importe peu qu'à ce moment, du gaz et de l'air soient également aspirés vers la conduite à partir des conduites reliées à la chambre puisque la conduite d'aspiration ne comporte pas de sonde.For intermittent control, circulation takes place in reverse: the vacuum created in the air line by the fan draws smoke from the hearth through the line to pass it over the analysis probe. It does not matter that at this time, gas and air are also sucked towards the pipe from the pipes connected to the chamber since the suction pipe does not include a probe.
Ainsi, cette installation de conception particulièrement simple permet de vérifier en permanence que la chaudière fonctionne dans des conditions normales et n'est pas trop déréglée.Thus, this particularly simple installation makes it possible to constantly check that the boiler is operating under normal conditions and is not too out of balance.
La sonde d'analyse est de préférence une sonde à oxygène, au zirconium ; il peut également s'agir d'autres capteurs et sondes ainsi que de combinaisons de sondes et de capteurs pour détecter les imbrûlés gazeux comme, par exemple, des sondes catarométriques permettant de détecter une combustion fortement déréglée émettant des imbrûlés gazeux du fait d'un défaut d'air ou d'un excès d'air, exagéré.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.
De façon générale, l'installation selon l'invention peut s'utiliser indépendamment ou en association avec un dispositif habituel de surveillance de flamme, sur des chaudières nouvelles, mais également sur des chaudières déjà existantes.In general, 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.
En outre, bien que la description des différents modes de réalisation ait été faite ci-dessus dans le cas de la surveillance d'une atmosphère oxydante utilisant dans certains modes de réalisation, une injection de gaz, l'installation peut également s'utiliser dans des conditions inverses pour contrôler une combustion réductrice. Dans ce cas, l'injection périodique de gaz est remplacée par une injection d'air.In addition, although the description of the various embodiments has been made above in the case of monitoring an oxidizing atmosphere using in certain embodiments, a gas injection, the installation can also be used in reverse conditions to control reductive combustion. In this case, the periodic injection of gas is replaced by an injection of air.
Bien qu'il soit intéressant dans le cas de chaudières travaillant sous pression, (c'est-à-dire dont l'air comburant est fourni par un ventilateur), de monter l'installation de surveillance comme précisé ci-dessus, cette application n'est pas limitative et l'installation, selon l'invention, peut également se monter dans des chaudières travaillant en dépression, c'est-à-dire aspirant l'air comburant.Although it is advantageous in the case of boilers working under pressure, (that is to say whose combustion air is supplied by a fan), to install the monitoring installation as specified above, this application is not limiting and the installation according to the invention can also be mounted in boilers working under vacuum, that is to say drawing in combustion air.
La présente invention sera décrite de façon plus détaillée à l'aide d'un mode de réalisation représenté schématiquement dans le dessin annexé dans lequel :
- la figure est un schéma d'une installation de surveillance du bon fonctionnement d'une chaudière.
- the figure is a diagram of an installation for monitoring the proper functioning of a boiler.
La figure montre l'installation de contrôle de fonctionnement d'une chaudière dont seul le brûleur 1 a été représenté avec sa conduite d'alimentation en gaz 2 munie d'une vanne 3 et sa conduite d'alimentation 4 en air fourni par un ventilateur 5 et un foyer 6.The figure shows the installation for controlling the operation of a boiler of which only the
L'installation comprend une prise de gaz 7 reliée à la tuyauterie de gaz 2, une prise d'air comburant 8 reliée à la conduite d'air comburant 4 et une chambre de simulation 9 dans laquelle on simule une combustion stoechiométrique qui est détectée par une sonde 10 placée dans la conduite de sortie 11 débouchant dans le foyer 6. Cette installation de surveillance de la combustion détecte la combustion par la sonde 10 et règle l'alimentation en gaz par l'intermédiaire de la vanne 3 commandée par le circuit de commande 12 pour que la combustion dans le foyer 6 se fasse suivant les conditions fixées (combustion oxydante ou combustion réductrice).The installation comprises a
Selon l'invention, l'installation de surveillance se compose d'une conduite 13 reliée à l'aspiration de la machine soufflante 5 et munie d'une vanne 14 commandée par un circuit de commande 15. La conduite 13 comporte un diaphragme 16 adaptant la perte de charge à la machine soufflante 5. Le dimensionnement des différentes conduites 7, 8, 11, 13 et du diaphragme 16 est tel que lorsque la vanne 14 est ouverte, l'installation fonctionne en aspirant des fumées du foyer 6 par la conduite 11 pour vérifier que l'atmosphère des fumées est bonne. Cette vérification se fait de façon intermittente suivant une périodicité réglée par le système de commande 12 éventuellement intégré au circuit 15 de commande de la vanne 14.According to the invention, the monitoring installation consists of a
La sonde de régulation peut être utilisée pour détecter périodiquement une mauvaise combustion dans le foyer. Pour cela, on vérifie en permanence pendant le fonctionnement du régulateur que la sonde est en bon état en s'assurant qu'elle bascule régulièrement entre ses deux états. Dans la négative, cela signifie soit que la sonde est hors service, soit que le régulateur ou ses moteurs fonctionnent mal. Dans les deux cas, la chaudière et son brûleur sont mis en sécurité. Périodiquement, si la sonde et le régulateur fonctionnent, la vanne est ouverte pour permettre l'aspiration des fumées du foyer (le régulateur est alors arrêté) et on vérifie que les fumées sont oxydantes. Dans la négative, on met le système en sécurité.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.
Comme déjà indiqué, de manière générale l'installation contrôle la nature de la combustion d'un brûleur en simulant une combustion dans une chambre de simulation 9 à l'aide du même gaz comburant et du même air comburant, fournis à cette chambre de combustion par l'intermédiaire de conduites fournissant un débit calibré. Le résultat de cette combustion de simulation est détecté par la sonde 10.As already indicated, in general, 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
La vérification du bon fonctionnement de la sonde 10 associée à la chambre de simulations est réalisée en faisant passer sur la sonde 10 les fumées du foyer 6 par l'ouverture intermittente de l'électrovanne 14 du tuyau 13 relié au côté d'aspiration du ventilateur 5 par l'intermédiaire de la chambre de simulation 9.Verification of the proper functioning of the
En fonctionnement normal, c'est-à-dire entre les contrôles intermittents, le gaz du tuyau d'alimentation 2 du brûleur est dérivé en partie vers la chambre de simulation 9 par la conduite 7 correspondante. Il en est de même d'une fraction d'air comburant dérivé de la conduite 4 à travers la conduite de prélèvement d'air 8. Les pressions de gaz et d'air dans les conduites 7, 8 sont suffisantes, combinées à la dépression régnant dans le foyer 6 pour faire circuler le gaz et l'air comburant puis les fumées de la combustion de simulation de la chambre 9 vers le foyer 6.In normal operation, that is to say between the intermittent checks, the gas from the
Par contre, pour le contrôle intermittent, la circulation se fait de manière inverse : la dépression créée dans la conduite d'air 13 par le ventilateur 5 aspire des fumées du foyer 6 à travers la conduite 11 pour les faire passer sur la sonde d'analyse 10. Il importe peu qu'à ce moment, du gaz et de l'air soient également aspirés vers la conduite 13 à partir des conduites 7 et 8 reliées à la chambre 9 puisque la conduite 13 d'aspiration ne comporte pas de sonde.On the other hand, for intermittent control, the circulation is done in reverse: the vacuum created in the
De façon générale, l'installation selon l'invention peut s'utiliser indépendamment ou associée à un dispositif habituel de surveillance de flamme.In general, the installation according to the invention can be used independently or associated with a usual flame monitoring device.
L'installation peut également s'utiliser pour contrôler une combustion de type réductrice, auquel cas l'injection périodique de gaz est remplacée par une injection d'air.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.
Claims (4)
- Installation for monitoring the correct operation of a boiler equipped with a burner (1) fed with gas (2) via a pipe equipped with a controlled valve (3), and with combustion air via a fan blower (5), the installation comprising an analysis probe connected to the control circuit (12) of the gas valve (3) and whose operation may be checked, which installation is characterised in that it comprises:- a combustion simulation chamber (9) connected via a gas connection (7) to the gas feed pipe and via an air connection (8) to the output (4) of the fan blower feeding the burner (1) with combustion air in order to simulate a combustion whose resultant gases are analysed by the probe placed in a pipe (11) connecting the chamber (9) to the furnace (6) of the boiler;- a pipe (13) connecting the simulation chamber (9) to the suction side of the pump (5), this pipe (13) being provided with a valve (14) connected to a control circuit (15), this normally closed valve being controlled intermittently in order to clear the pipe (13) and to permit the suction of flue gases from the furnace (6) through the pipes (11) and (13) in order to cause the flue gases to pass over the probe (10) and to trigger the latter in order to check the correct operation thereof.
- Monitoring installation according to Claim 1, characterised in that the analysis probe (10) is a zirconium-based oxygen probe.
- Monitoring installation according to Claim 1, characterised in that the probe (10) permits the detection of the oxidising or reducing state of the gases which it analyses.
- Installation according to Claim 1, characterised in that it comprises a means for checking that the probe switches properly within a given time when it is operating as a regulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT86402905T ATE73534T1 (en) | 1985-12-31 | 1986-12-23 | DEVICE FOR MONITORING THE OPERATION OF A BOILER. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8519491 | 1985-12-31 | ||
| FR8519491A FR2592465B1 (en) | 1985-12-31 | 1985-12-31 | INSTALLATION FOR MONITORING THE OPERATION OF A BOILER |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0231705A1 EP0231705A1 (en) | 1987-08-12 |
| EP0231705B1 true EP0231705B1 (en) | 1992-03-11 |
Family
ID=9326364
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP86402905A Expired - Lifetime EP0231705B1 (en) | 1985-12-31 | 1986-12-23 | Monitoring device for boiler functions |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US4698015A (en) |
| EP (1) | EP0231705B1 (en) |
| AT (1) | ATE73534T1 (en) |
| DE (1) | DE3684296D1 (en) |
| FR (1) | FR2592465B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101504151B (en) * | 2008-12-19 | 2011-02-16 | 惠德时代能源科技(北京)有限公司 | Mounting process for boiler oxygen content test system |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2607905B1 (en) * | 1986-12-05 | 1990-01-26 | Pramata | DEVICE FOR VERIFYING THE STATE OF THE SMOKE OF A FUEL BURNING HEAT OR FORCE |
| FR2609154A1 (en) * | 1986-12-29 | 1988-07-01 | Pramata | Device for regulating combustion, especially the oxygen content of the combustion flue gases (smoke), by means of a burner using blown air, method of implementation and burner equipped with such a device |
| FR2609155B1 (en) * | 1986-12-30 | 1989-08-18 | Pramata | DEVICE FOR REGULATING THE OXYGEN CONTENT OF COMBUSTION SMOKE |
| DE3705334A1 (en) * | 1987-01-28 | 1988-08-11 | Landis & Gyr Ag | SUCTION DEVICE FOR GAS SENSORS IN HEATING SYSTEMS |
| GB2412157B (en) * | 2001-07-12 | 2006-01-18 | Luke Chamberlain | Boiler unit with quick release flue connection |
| 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 |
| US8439667B2 (en) * | 2008-11-25 | 2013-05-14 | Utc Fire & Security Corporation | Oxygen trim controller tuning during combustion system commissioning |
| US9851103B2 (en) | 2011-12-15 | 2017-12-26 | Honeywell International Inc. | Gas valve with overpressure diagnostics |
| US9995486B2 (en) | 2011-12-15 | 2018-06-12 | Honeywell International Inc. | Gas valve with high/low gas pressure detection |
| US9835265B2 (en) | 2011-12-15 | 2017-12-05 | Honeywell International Inc. | Valve with actuator diagnostics |
| US9846440B2 (en) | 2011-12-15 | 2017-12-19 | Honeywell International Inc. | Valve controller configured to estimate fuel comsumption |
| 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 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1253205B (en) * | 1963-06-01 | 1967-11-02 | Bbc Brown Boveri & Cie | Electrical monitoring device for gas firing systems |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3307613A (en) * | 1965-09-03 | 1967-03-07 | Honeywell Inc | Control apparatus |
| DE2460066C3 (en) * | 1974-12-19 | 1981-08-06 | Brown, Boveri & Cie Ag, 6800 Mannheim | Method and device for the automatic control of the fuel-air ratio of a combustion |
| JPS5630533A (en) * | 1979-08-20 | 1981-03-27 | Rinnai Corp | Safety device for combustion system |
| DE3028665A1 (en) * | 1980-07-29 | 1982-02-25 | Brown, Boveri & Cie Ag, 6800 Mannheim | DEVICE WITH AN OXYGEN PROBE |
| DE3208765A1 (en) * | 1982-03-11 | 1983-09-22 | Ruhrgas Ag, 4300 Essen | METHOD FOR MONITORING COMBUSTION PLANTS |
| JPS59180218A (en) * | 1983-03-30 | 1984-10-13 | Babcock Hitachi Kk | Combustion control device |
| DE3408397A1 (en) * | 1984-03-08 | 1985-09-19 | Ruhrgas Ag, 4300 Essen | METHOD AND ARRANGEMENT FOR DETERMINING THE MIXING RATIO OF A MIXTURE CONTAINING OXYGEN CARRIER GAS AND A FUEL |
-
1985
- 1985-12-31 FR FR8519491A patent/FR2592465B1/en not_active Expired
-
1986
- 1986-12-23 DE DE8686402905T patent/DE3684296D1/en not_active Expired - Fee Related
- 1986-12-23 EP EP86402905A patent/EP0231705B1/en not_active Expired - Lifetime
- 1986-12-23 AT AT86402905T patent/ATE73534T1/en not_active IP Right Cessation
- 1986-12-29 US US06/947,388 patent/US4698015A/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1253205B (en) * | 1963-06-01 | 1967-11-02 | Bbc Brown Boveri & Cie | Electrical monitoring device for gas firing systems |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101504151B (en) * | 2008-12-19 | 2011-02-16 | 惠德时代能源科技(北京)有限公司 | Mounting process for boiler oxygen content test system |
Also Published As
| Publication number | Publication date |
|---|---|
| US4698015A (en) | 1987-10-06 |
| FR2592465A1 (en) | 1987-07-03 |
| EP0231705A1 (en) | 1987-08-12 |
| ATE73534T1 (en) | 1992-03-15 |
| DE3684296D1 (en) | 1992-04-16 |
| FR2592465B1 (en) | 1988-03-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0231705B1 (en) | Monitoring device for boiler functions | |
| CA2205774C (en) | Method and apparatus for controlling combustion using an oxygen sensor | |
| US3932111A (en) | Apparatus for incinerating combustible wastes | |
| US7161678B2 (en) | Systems and methods for determining the existence of a visible plume from the chimney of a facility burning carbon-based fuels | |
| CN111288484B (en) | Flame monitor | |
| KR970075295A (en) | Abnormality detection device of fuel evaporation prevention device | |
| US7600997B2 (en) | Method for increasing the throughput of packages in rotary tubular kiln apparatus | |
| CA1242620A (en) | Rapid response device for detecting incomplete combustion and method therefor | |
| US3701622A (en) | Excess smoke eliminating system for boilers | |
| CN219489923U (en) | An anti-explosion mechanism for leak detection in the area of a gas generator | |
| GB2105888A (en) | Detecting flue blockage | |
| JPH08233261A (en) | Unburnt gas concentration-detecting device for combustion device | |
| US4015927A (en) | Automatic high-low burner operation | |
| GB2280023A (en) | Detecting air/fuel gas ratio in heating appliance. | |
| CN216924355U (en) | Low CO combustion control system | |
| GB2183334A (en) | Gas detector and mining machine | |
| CA2421664A1 (en) | Improved flame sensor and method of using same | |
| SU1733844A1 (en) | Boiler | |
| JP4055678B2 (en) | Flame atomic absorption photometer | |
| KR102760530B1 (en) | Flare stack system in which combustion is performed according to the total calorific value of the combustion section | |
| FR2546293A1 (en) | Detector/measurer of gas flow between two connected enclosures, in particular for smoke and/or ventilation conduits | |
| JP3146975B2 (en) | Combustion control method | |
| JPS6133402Y2 (en) | ||
| JPH11351556A (en) | Combustion monitoring apparatus for combustion furnace | |
| KR20250093078A (en) | Cokes oven ignition device comprising ignition unit and current dectection sensor and cokes oven comprsiing the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH DE ES GB IT LI NL SE |
|
| 16A | New documents despatched to applicant after publication of the search report | ||
| 17P | Request for examination filed |
Effective date: 19880211 |
|
| 17Q | First examination report despatched |
Effective date: 19891124 |
|
| DIN1 | Information on inventor provided before grant (deleted) | ||
| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: BRUNEL, GERALD |
|
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: SOCIETE D'ETUDE ET DE CONSTRUCTION DE CHAUDIERES A |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT BE CH DE ES GB IT LI NL SE |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRE;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.SCRIBED TIME-LIMIT Effective date: 19920311 Ref country code: GB Effective date: 19920311 Ref country code: AT Effective date: 19920311 Ref country code: SE Effective date: 19920311 Ref country code: NL Effective date: 19920311 |
|
| REF | Corresponds to: |
Ref document number: 73534 Country of ref document: AT Date of ref document: 19920315 Kind code of ref document: T |
|
| REF | Corresponds to: |
Ref document number: 3684296 Country of ref document: DE Date of ref document: 19920416 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 19920622 |
|
| NLV1 | Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act | ||
| GBV | Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed] | ||
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LI Effective date: 19921231 Ref country code: BE Effective date: 19921231 Ref country code: CH Effective date: 19921231 |
|
| PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
| 26N | No opposition filed | ||
| BERE | Be: lapsed |
Owner name: SOC. D'ETUDE ET DE CONSTRUCTION DE CHAUDIERES AUT Effective date: 19921231 |
|
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Effective date: 19930901 |