WO2023094194A1 - Système de four et procédé pour le faire fonctionner - Google Patents

Système de four et procédé pour le faire fonctionner Download PDF

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Publication number
WO2023094194A1
WO2023094194A1 PCT/EP2022/081729 EP2022081729W WO2023094194A1 WO 2023094194 A1 WO2023094194 A1 WO 2023094194A1 EP 2022081729 W EP2022081729 W EP 2022081729W WO 2023094194 A1 WO2023094194 A1 WO 2023094194A1
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WO
WIPO (PCT)
Prior art keywords
fuel
burner
oxygen
containing gas
feed line
Prior art date
Application number
PCT/EP2022/081729
Other languages
German (de)
English (en)
Inventor
Jörg Winkel
Original Assignee
Schwartz 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 Schwartz Gmbh filed Critical Schwartz Gmbh
Publication of WO2023094194A1 publication Critical patent/WO2023094194A1/fr

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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
    • 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
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C2900/00—Special features of, or arrangements for combustion apparatus using fluid fuels or solid fuels suspended in air; Combustion processes therefor
    • F23C2900/9901—Combustion process using hydrogen, hydrogen peroxide water or brown gas as fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2221/00—Pretreatment or prehandling
    • F23N2221/10—Analysing fuel properties, e.g. density, calorific

Definitions

  • the invention relates to a furnace system, in particular for the thermal treatment of components before press hardening, for example for the production of parts for a motor vehicle body. Furthermore, the invention relates to a method for operating such a furnace system.
  • the object of the present invention is therefore to achieve optimum efficiency even when the fuel composition fluctuates and to enable particularly precise temperature control.
  • the furnace system includes:
  • a sensor for analyzing the fuel - a second supply line connected to the burner for an oxygen-containing gas with an adjustment device for adjusting a flow rate of the oxygen-containing gas through the second supply line,
  • a control device which is set up to adjust the flow rate of the oxygen-containing gas through the second feed line with the adjusting device depending on a signal from the sensor.
  • the furnace system can be used, for example, to heat metallic components, in particular metallic motor vehicle parts.
  • the furnace system can be used to thermally treat components before press hardening. But it is also conceivable to use it for any other purpose that requires a furnace system.
  • the furnace system includes a furnace chamber and one or more burners for heating the furnace chamber.
  • the burners can be located entirely or partially within the furnace chamber.
  • the burners are preferably set up to be operated with a gaseous fuel, in particular with natural gas.
  • the burners can also be operated with various other fuels, for example with a mixture of combustible gases such as hydrogen and methane.
  • It is precisely an advantage of the furnace system described that the burners can be operated with fuel of different compositions. The fuel can even be changed during operation without the need for structural adjustments to the burners.
  • the furnace system is therefore particularly flexible with regard to the fuel used.
  • the requirements for the composition of the fuel are correspondingly low. This is particularly advantageous with regard to climate protection, because adding hydrogen or biomethane to the fuel, for example, can contribute to climate protection.
  • hydrogen and/or biomethane can be added to the fuel, insofar as these are available.
  • the furnace plant is preferably an industrial furnace plant. For this purpose, preferably present features of the furnace system are mentioned below, by which this can be recognized.
  • the furnace plant is preferably stationary.
  • the oven chamber preferably has an extension of more than 1.5 m, in particular of at least 10 m in at least one direction. This quantifies that the furnace system is designed and set up for industrial use.
  • the furnace system is preferably designed as a roller hearth furnace.
  • the roller hearth furnace preferably has a length of at least 10 m, in particular at least 30 m.
  • the length of the roller hearth furnace means the extension of the furnace chamber along the direction in which components can be moved through the furnace chamber via rollers.
  • the furnace system preferably has at least 10, in particular at least 50, burners.
  • the furnace system is preferably set up for a temperature of at least 400.degree. C. in the furnace chamber, in particular at least 600.degree.
  • the furnace system also includes a first supply line for a fuel, which is connected to the burner. If several burners are provided, the first supply line is preferably connected to each of the burners. This can be the case, for example, in that the first supply line has a respective branch for each of the burners, which branches off from a main part of the first supply line.
  • the furnace system can have a fuel inlet via which the fuel can be fed into the first feed line from outside the furnace system.
  • the furnace system can be connected to a public gas network.
  • the first supply line can lead from a fuel source to the burner or burners, with the fuel source being part of the furnace system.
  • the fuel source can be a tank.
  • the furnace system also includes a sensor for analyzing the fuel.
  • the sensor is preferably set up to analyze a chemical composition of the fuel. Alternatively, the sensor can be set up to determine the calorific value of the fuel. This results from the chemical composition.
  • the sensor is preferably integrated into the first feed line.
  • the furnace system comprises a first supply line for a fuel, connected to the burner, with a sensor for analyzing the fuel.
  • the measurement with the sensor can be done inline.
  • the fuel is analyzed while it flows past the sensor through the first feed line.
  • the sensor can be set up for off-line analysis of samples of the fuel flowing through the first feed line. This means that the chemical composition of the fuel can only be analyzed selectively. However, this is usually sufficient because the chemical composition of the fuel usually only changes over a longer period of time.
  • the senor is set up to analyze the fuel before the fuel is introduced into the first feed line.
  • the sensor may be located on a fuel source to analyze fuel in the fuel source.
  • the furnace system also includes a second supply line, connected to the burner, for an oxygen-containing gas.
  • the oxygen-containing gas is preferably air.
  • An oxygen content in the oxygen-containing gas is preferably at least 10%, in particular between 10 and 50%.
  • the second supply line is preferably connected to each of the burners. This can be the case, for example, in that the second supply line has a respective branch for each of the burners, which branches off from a main part of the second supply line.
  • the second supply line preferably leads from an intake point for ambient air to the burner or to the burners.
  • the furnace system can also have a source for the oxygen-containing gas, for example a tank.
  • the second supply line leads from the source for the oxygen-containing gas to the burner or burners.
  • the furnace system can have an inlet for the oxygen-containing gas, via which the oxygen-containing gas can be fed into the second feed line from outside the furnace system.
  • An adjustment device for adjusting a flow rate of the oxygen-containing gas through the second feed line is provided in the second feed line.
  • the adjusting device can be implemented, for example, in that an adjustable amount of ambient air is sucked in and introduced into the second supply line can be.
  • the setting device can be a blower, which introduces ambient air into the second feed line.
  • the adjustment device can be implemented by a control valve, via which the flow of the oxygen-containing gas through the second feed line can be adjusted.
  • the adjusting device is arranged to act on the pressure in the second supply line (as is the case with an adjustable fan) and/or to act locally on a flow cross-section of the second supply line (as is the case with a control valve).
  • the flow of the oxygen-containing gas through the second supply line can be influenced via one or both of these parameters.
  • the furnace system also includes a control device.
  • This is set up to use the setting device to set the flow of the oxygen-containing gas through the second supply line as a function of a signal from the sensor.
  • the aim is to keep the heat output from the burner as constant as possible, even if the chemical composition of the fuel changes over time and the fuel therefore has a calorific value that changes over time.
  • This is particularly advantageous when the fuel is or includes natural gas. Natural gas can have different chemical compositions, so fluctuations in the chemical composition are to be expected, especially when using natural gas. This is also an advantage if the fuel contains admixtures such as biomethane or hydrogen.
  • the heat output from the burner is kept constant.
  • the control device is therefore preferably set up to use the setting device to set the flow of the oxygen-containing gas through the second feed line as a function of a signal from the sensor in such a way that a heating output delivered by the burner is kept constant.
  • the control device is therefore preferably set up to using the adjusting device to adjust the flow of the oxygen-containing gas through the second feed line as a function of a signal from the sensor in such a way that a fluctuation in the heat output delivered by the burner is kept as small as possible.
  • control device can be set up to use the setting device to set the flow of the oxygen-containing gas through the second supply line as a function of a signal from the sensor in such a way that a heating output delivered by the burner does not fluctuate by more than a predetermined limit value around a mean value.
  • the limit value is preferably 20%, in particular 5%, of the mean value.
  • the fuel is analysed, preferably in the first feed line. This results in a measured variable entering the control device as an input variable.
  • the proportion of a specific substance in the fuel can be used as a measured variable.
  • the hydrogen content in the fuel is particularly preferred.
  • the respective proportions of several specific substances in the fuel can also be used as measured variables, for example hydrogen and methane.
  • This can be realized in that several parameters are correspondingly encoded in the signal output by the sensor.
  • the calorific value of the fuel can be encoded in the signal output by the sensor. This results from the chemical composition of the fuel and can be determined from this, for example, in sensor electronics.
  • an actuating signal for the setting device is generated in the control device. This can be done, for example, using a table of values or a mathematical function stored in the control device.
  • the table of values or the mathematical function can be created in experiments.
  • the setting device can be set in response to the output of the control signal.
  • the setting device is set using the control signal, which results in a corresponding flow through the first feed line. It is also possible that the control signal that is output is used as a setpoint on which the input Adjusting device regulates the flow through the first supply line. In this case, the adjustment device is designed as a control device.
  • the dependency stored in the control device between the flow rate of the oxygen-containing gas to be set through the second feed line and the analysis of the fuel makes it possible to achieve the goal that the heat output delivered by the burner remains constant even when the fuel composition fluctuates.
  • a corresponding amount of oxygen can be provided.
  • an optimal ratio between fuel and oxygen for the respective fuel composition can be achieved in the burner.
  • a stoichiometric ratio is preferably achieved.
  • the furnace system can thus have an oxygen sensor which is set up to measure the oxygen content in the oxygen-containing gas in the second feed line or before the oxygen-containing gas enters the second feed line.
  • the control device can be set up to use the setting device to set the flow of the oxygen-containing gas through the second feed line as a function of a signal from the sensor for analyzing the fuel and as a function of a signal from the oxygen sensor.
  • the burners can be arranged in groups. In that case, a respective first lead and a respective second lead are preferably present for each group.
  • the control device is preferably set up to control all groups in the manner described herein for the at least one burner. However, it is also conceivable for each group to have its own control device.
  • the senor is set up to determine at least a proportion of hydrogen in the fuel.
  • the furnace system is particularly well suited for fuel to which hydrogen is admixed at least from time to time.
  • the furnace system described can react automatically when the addition of hydrogen is started or ended or when the amount of hydrogen added changes over time.
  • the hydrogen can be added to the fuel depending on the availability of the hydrogen without the need for manual adjustment of the furnace system.
  • the adjustment device is formed by a blower with an adjustable speed.
  • ambient air can be sucked in as the oxygen-containing gas, compressed and introduced into the second feed line. This applies regardless of whether the ambient air actually meets the definition of "air”. It is also conceivable that the fan sucks in a gas containing oxygen from another source. It is therefore also referred to here generally as "oxygen-containing gas” and not from Spoken "air”.
  • the flow rate of the oxygen-containing gas through the second line can be adjusted via the speed of the fan. The adjustment of the speed of the fan can also be referred to as a frequency control.
  • the blower and/or the second supply line can have one or more control valves, via which the flow of the oxygen-containing gas through the second supply line can be set.
  • a control valve or such control valves can also be regarded as part of the adjustment device.
  • the furnace system also includes a lambda probe for analyzing flue gas which is produced when the fuel from the first feed line is reacted with the oxygen-containing gas from the second feed line.
  • the flue gas is formed when the fuel from the first feed line is reacted with the oxygen-containing gas from the second feed line.
  • This flue gas can be analyzed with a lambda probe.
  • the lambda probe set up to determine at least an oxygen content of the flue gas. Since the flue gas is the product of the reaction of the fuel with the oxygen-containing gas, the oxygen content in the flue gas can also be referred to as the residual oxygen content. Knowing the residual oxygen content allows conclusions to be drawn about the combustion in the burner. Combustion in the burner can be optimized with the lambda probe.
  • the control device is preferably set up to take a signal from the lambda probe into account.
  • the furnace system also includes a sensor for determining the proportion of carbon monoxide in the flue gas which is produced when the fuel from the first feed line is reacted with the oxygen-containing gas from the second feed line.
  • a sensor for determining the proportion of carbon monoxide in the flue gas which is produced when the fuel from the first feed line is reacted with the oxygen-containing gas from the second feed line.
  • the furnace system also comprises a reference burner connected to the first feed line and the second feed line, the lambda probe being set up to analyze the flue gas generated by the reference burner.
  • the conversion of the fuel and the oxygen-containing gas takes place, among other things, in the burner. However, it is not necessary for the flue gas that is actually produced in the burner to be analyzed. It is sufficient for flue gas to be analyzed which corresponds to the flue gas occurring in the burner. This is possible in the present embodiment with the reference burner.
  • the fuel from the first feed line and the oxygen-containing gas from the second feed line are fed to this in such a way that the same ratio between the fuel and the oxygen-containing gas is present in the reference burner as in the burner or in the plurality of burners.
  • the same flue gas is therefore produced in the reference burner as in the burner or in the burners.
  • the reference burner is therefore representative of the burner or burners.
  • the reference burner does not have to be set up to heat the furnace chamber. Even if the reference burner contributes to the heating of the furnace chamber, the reference burner does not have to be set up specifically for this purpose. Instead, the reference burner can be designed to enable the most precise and trouble-free analysis of the flue gas possible.
  • the reference burner preferably has a closed burner chamber. In this, the fuel and the oxygen-containing gas can be converted undisturbed by external influences. In particular, it can be achieved in this way that, in addition to the flue gas, other gases do not reach the lambda probe and falsify the measurement result.
  • the lambda probe is preferably arranged in an exhaust pipe of the reference burner.
  • the reference burner is preferably designed as a pilot burner.
  • the flue gas that is produced in the burner is analyzed.
  • the flue gas generated in one, some or all of the burners can be analysed. If the flue gas is analyzed which is produced at several different points (for example in several burners), the lambda probe can be arranged in a collecting line in which the flue gas from the various points is collected. Alternatively or additionally, several lambda probes can also be used, the signals of which are combined with one another, for example by averaging.
  • the carbon monoxide sensor can also be arranged in an exhaust pipe, through which flue gas can be led out of the oven chamber. This is possible because in most applications carbon monoxide in the furnace chamber - in contrast to oxygen - necessarily comes from the flue gas of the burner or burners.
  • the furnace system also includes a regulator in the first feed line, the control device being set up to use the regulator to adjust a flow of the fuel through the first feed line as a function of a signal from the lambda probe.
  • the analysis of the flue gas by means of the lambda probe is used to adjust the flow of fuel through the first feed line.
  • the combustion in the burner can be optimized.
  • the control device is preferably set up to regulate the residual oxygen content to a specified target value, in particular to a specified target value in the range from 1 to 10%, in particular to 4%. This is possible by adjusting the flow of fuel through the first feed line, because the amount of fuel burned affects the residual oxygen content.
  • the regulator is preferably a pressure regulator, in particular a valve.
  • the carbon monoxide content in the flue gas can be regulated to a corresponding target value with a sensor for analyzing the carbon monoxide content in the flue gas. This is possible by adjusting the flow of fuel through the first feed line, because the amount of fuel burned affects the level of carbon monoxide in the flue gas.
  • the burner is a radiant tube burner.
  • radiant tube burners in particular shows that the furnace system described is intended and set up for industrial use.
  • a method for operating a furnace system is presented as a further aspect of the invention.
  • the method comprises: a) supplying a fuel and an oxygen-containing gas to a
  • Burner for heating a furnace chamber of the furnace system b1) analyzing the fuel fed to the burner, b2) adjusting a quantity of the oxygen-containing gas fed to the burner as a function of the analysis according to step b1).
  • the described advantages and features of the furnace system can be applied and transferred to the process and vice versa.
  • the furnace system is preferably set up for operation in accordance with the method described.
  • the method is preferably carried out using the furnace system described.
  • Step a) is preferably carried out continuously.
  • Steps b1) and b2) can be carried out once, several times at discrete points in time, in particular periodically, or continuously.
  • Steps b1) and b2) are preferably carried out in parallel with step a).
  • a temporal dependency of step b2) on step b1) arises only to the extent that step b2) uses the result of step b1).
  • step b1) the chemical composition of the fuel is preferably analyzed.
  • a hydrogen content of the fuel is preferably determined in particular.
  • the method further comprises: d) analyzing a flue gas which is produced during the reaction of the fuel and oxygen-containing gas fed to the burner in step a), c2) adjusting a quantity of fuel fed to the burner as a function of the analysis according to step d).
  • Steps d) and c2) can be carried out once, several times at discrete points in time, in particular periodically, or continuously. Steps d) and c2) are preferably carried out in parallel with step a). A temporal dependency of step c2) on step d) arises only to the extent that step c2) uses the result of step d). Steps b1) and b2) on the one hand and steps d) and c2) on the other hand can be carried out independently of one another in terms of time. In particular, it is not necessary for steps b1) and b2) to be carried out before steps d) and c2).
  • step d) the chemical composition of the flue gas is preferably analyzed.
  • a residual oxygen content and/or a carbon monoxide content of the flue gas are preferably determined.
  • no measurement is required on the flue gas actually produced in the burner.
  • the analysis of flue gas, which corresponds to the flue gas generated in the burner, is sufficient.
  • a measurement can be carried out on a reference burner.
  • the furnace system 1 shows a furnace system 1 with a furnace chamber 2 and, by way of example, six burners 3 for heating the furnace chamber 2.
  • the burners 3 are designed as radiant tube burners.
  • the furnace system 1 comprises a first feed line 4 for a fuel, which is connected to the burners 3 .
  • a sensor 6 for fuel analysis In the first feed line 4 there is a sensor 6 for fuel analysis, with which a composition of fuel fed to the burners 3 can be analyzed.
  • the sensor 6 is set up to determine at least a proportion of hydrogen in the fuel.
  • the furnace system 1 comprises a second supply line 5, connected to the burners 3, for an oxygen-containing gas with an adjustment device 7 for adjusting a flow rate of the oxygen-containing gas through the second supply line 5.
  • the adjustment device 7 is formed by a blower with an adjustable speed, via which ambient air can be sucked in as the oxygen-containing gas, compressed and introduced into the second supply line 5 . This is indicated by an arrow.
  • the furnace system 1 includes a control device 8 which is set up to adjust the flow of the oxygen-containing gas through the second feed line 5 with the adjusting device 7 as a function of a signal from the sensor 6 .
  • the furnace system 1 comprises a lambda probe 9 for analyzing flue gas, which is produced when the fuel from the first supply line 4 is reacted with the oxygen-containing gas from the second supply line 5, as well as a controller 11 in the first supply line 4.
  • the control device 8 is set up to use the controller 11 to adjust a flow of the fuel through the first feed line 4 as a function of a signal from the lambda probe 9 .
  • the lambda probe 9 is connected to the first supply line 4 and the second supply line 5 as a pilot burner trained reference burner 10 arranged that with the lambda probe 9 generated by the reference burner 10 flue gas can be analyzed.
  • the furnace system 1 can be operated with a method which comprises: a) supplying a fuel and an oxygen-containing gas to the burners 3 for heating the furnace chamber 2 of the furnace system 1, b1) analyzing the fuel supplied to the burners 3, b2) Adjusting a quantity of the oxygen-containing gas supplied to the burners 3 as a function of the analysis according to step b1), d) analyzing a flue gas which arises when the fuel and oxygen-containing gas supplied to the burners 3 in step a) are converted, c2) Adjusting an amount of fuel fed to the burners 3 as a function of the analysis according to step d).
  • the burners 3 of the furnace system 1 described emit a constant heat output even when the calorific value of the fuel fluctuates, which enables precise temperature control.
  • the furnace system 1 can be operated with a wide variety of fuels. In particular, admixtures such as hydrogen to the fuel are possible. The furnace system 1 can thus be operated in a particularly climate-friendly manner.

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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)

Abstract

L'invention concerne un système de four (1) comprenant - une chambre de four (2), - un brûleur (3) pour chauffer la chambre de four (2), - une première conduite d'alimentation (4) pour un combustible, ladite première conduite d'alimentation étant reliée au brûleur (3), - un capteur (6) pour analyser le combustible, - une seconde conduite d'alimentation (5) pour un gaz contenant de l'oxygène, ladite seconde conduite d'alimentation étant reliée au brûleur (3) et comprenant un moyen d'ajustement (7) pour ajuster l'écoulement du gaz contenant de l'oxygène à travers la seconde conduite d'alimentation (5), - un dispositif de commande (8) qui est conçu pour ajuster, au moyen du moyen d'ajustement (7), l'écoulement du gaz contenant de l'oxygène à travers la seconde conduite d'alimentation (5) sur la base d'un signal provenant du capteur (6). Les brûleurs (3) du système de four décrit (1) émettent une sortie de chaleur constante même lorsque la valeur de chauffage du combustible fluctue, ce qui permet une régulation précise de température. À cet égard, le système de four (1) peut être actionné à l'aide de divers combustibles. En particulier, des mélanges tels que de l'hydrogène dans le carburant sont possibles. Le fonctionnement du système de four (1) peut donc être particulièrement respectueux de l'environnement.
PCT/EP2022/081729 2021-11-29 2022-11-14 Système de four et procédé pour le faire fonctionner WO2023094194A1 (fr)

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DE102021131260.4 2021-11-29
DE102021131260.4A DE102021131260A1 (de) 2021-11-29 2021-11-29 Ofenanlage und Verfahren für deren Betrieb

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013104837A1 (de) * 2012-05-11 2013-11-14 Fisher-Rosemount Systems, Inc. Verfahren und Vorrichtung zum Steuern von Verbrennungsprozesssystemen
WO2019049046A2 (fr) * 2017-09-05 2019-03-14 John Zink Company, Llc Procédé et appareil associés à un brûleur de combustion à faibles émissions de nox et de co
WO2020255089A1 (fr) * 2019-06-21 2020-12-24 Onpoint Technologies, Llc Système de combustion à combustible inféré et procédés associés

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3408397A1 (de) 1984-03-08 1985-09-19 Ruhrgas Ag, 4300 Essen Verfahren und anordnung zur bestimmung des mischungsverhaeltnisses eines ein sauerstofftraegergas und einen brennstoff enthaltenden gemisches
CA2072122A1 (fr) 1989-10-30 1991-05-01 Ulrich Bonne Dispositif de reglage de la combustion, a base de micropont
DE202019100263U1 (de) 2019-01-17 2019-02-04 Ebm-Papst Landshut Gmbh Heizgerät mit Regelung eines Gasgemisches unter Nutzung eines Gassensors, eines Brenngassensors und eines Gasgemischsensors

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013104837A1 (de) * 2012-05-11 2013-11-14 Fisher-Rosemount Systems, Inc. Verfahren und Vorrichtung zum Steuern von Verbrennungsprozesssystemen
WO2019049046A2 (fr) * 2017-09-05 2019-03-14 John Zink Company, Llc Procédé et appareil associés à un brûleur de combustion à faibles émissions de nox et de co
WO2020255089A1 (fr) * 2019-06-21 2020-12-24 Onpoint Technologies, Llc Système de combustion à combustible inféré et procédés associés

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