EP3821173B1 - Brenner für industrieöfen, trockner und dergleichen - Google Patents

Brenner für industrieöfen, trockner und dergleichen Download PDF

Info

Publication number
EP3821173B1
EP3821173B1 EP19756253.1A EP19756253A EP3821173B1 EP 3821173 B1 EP3821173 B1 EP 3821173B1 EP 19756253 A EP19756253 A EP 19756253A EP 3821173 B1 EP3821173 B1 EP 3821173B1
Authority
EP
European Patent Office
Prior art keywords
burner
duct
outlet section
passageway
partition
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.)
Active
Application number
EP19756253.1A
Other languages
English (en)
French (fr)
Other versions
EP3821173A1 (de
EP3821173C0 (de
Inventor
Fabio TAROZZI
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.)
Siti B&T Group SpA
Original Assignee
Siti B&T Group SpA
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 Siti B&T Group SpA filed Critical Siti B&T Group SpA
Publication of EP3821173A1 publication Critical patent/EP3821173A1/de
Application granted granted Critical
Publication of EP3821173C0 publication Critical patent/EP3821173C0/de
Publication of EP3821173B1 publication Critical patent/EP3821173B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/20—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone
    • F23D14/22—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other
    • 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 
    • F23C7/00—Combustion apparatus characterised by arrangements for air supply
    • F23C7/002—Combustion apparatus characterised by arrangements for air supply the air being submitted to a rotary or spinning motion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/20—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone
    • F23D14/22—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other
    • F23D14/24—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other at least one of the fluids being submitted to a swirling motion
    • 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 
    • F23C7/00—Combustion apparatus characterised by arrangements for air supply
    • F23C7/008—Flow control devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2203/00—Gaseous fuel burners
    • F23D2203/007—Mixing tubes, air supply regulation

Definitions

  • the present invention relates to a burner for industrial kilns, dryers and the like.
  • burners are used which, using a gaseous fuel such as e.g. natural gas, generate thermal energy and deliver it inside a portion of the system or device (known as firing chamber, or drying chamber, etc.), in which the products being processed are located or through which they transit.
  • a gaseous fuel such as e.g. natural gas
  • the aforementioned burners are installed, in a suitable number, inside the system or device according to the most suitable configuration in relation to the type of product treated, and in relation to the treatment methods of the same; in the most typical applications, the burners are housed inside respective through openings formed in the side walls of the system or device, with the respective nozzles, if any, relating to the inner chamber.
  • Each burner usually comprises a main body, for example a tubular or substantially tubular body, provided with a first fuel inlet port, and with a second port for the entry of the oxidizing element, i.e. normally air (if necessary preheated to a certain temperature).
  • a main body for example a tubular or substantially tubular body, provided with a first fuel inlet port, and with a second port for the entry of the oxidizing element, i.e. normally air (if necessary preheated to a certain temperature).
  • the aforementioned first port communicates with a fuel supply manifold, typically coaxial to the main body; such manifold flows into a final supply element, provided with holes.
  • the diffuser is sized and mounted in such a way as to circumscribe the fuel supply end element, so as to keep the air and fuel outlets very close to each other.
  • ignition means are provided, which determine the ignition of a spark that ignites the mixture.
  • the burners of the type described above have some drawbacks, mainly related to the limited power range within which they have an optimal and regular, or in any case satisfactory behavior, free of malfunctions in relation to the specific application.
  • the air enters the burner through the diffuser which surrounds the gas supply end element the increase in its flow rate, beyond a certain limit, causes phenomena of accentuated turbulence mainly in the area of flame generation.
  • US 2008/138751 A1 , EP 0945678A2 and CN 103277795A disclose burners having a relative body provided with a first passageway for supplying primary air and a second passageway for supplying secondary air, where the first passageway has a first outlet section and the second passageway has a second outlet section, the second outlet section being located at the periphery of the first outlet section.
  • the burners disclosed by US 2008/138751 A1 , EP 0945678A2 and CN 103277795A further comprise a collector for the supply of fuel, provided with an end element adapted to dispense gas, surrounded by the first outlet section.
  • Another object of the present invention is to provide a burner for industrial kilns, dryers and the like that can operate optimally in a wider power range than burners currently used.
  • Another object of the present invention is to provide a burner for industrial kilns, dryers and the like which allows reducing or eliminating the harmful phenomena of turbulence due to the speed of the combustion air introduced through the diffuser.
  • the burner comprises a body, provided with a first passageway for the supply of primary combustion air, ending in a first outlet section.
  • the burner comprises a manifold for the supply of the fuel, provided with a gas supply end element, surrounded by the aforementioned first outlet section.
  • the burner also comprises triggering means for triggering the combustion of the fuel-oxidizing element mixture, and a nozzle, connected to the above body, provided with an outflow port adapted for the combustion products generated inside the burner to come out.
  • the secondary air which is introduced into the nozzle through a peripheral outlet section with respect to that of the primary air, compensates for the lack of combustion air resulting from the regulation of the primary air flow rate; the latter is instead limited according to two typical situations so as not to generate turbulence in the center of the nozzle in case of high power demand, or not to cause the accidental extinguishment of the flame, in case of low power demand.
  • reference numeral 1 globally indicates a burner for industrial kilns, dryers and the like according to the present invention.
  • the burner 1 of particularly effective and advantageous use in the context of firing kilns for ceramic products such as ceramic tiles, sanitary ware, and the like.
  • the body 2 could however have a different shape or geometry than the cylindrical tubular one, in relation to specific application requirements.
  • distal relates to the parts of the burner 1 facing the firing chamber, and therefore towards the inside of the kiln (not shown in the illustrations), while the adjective “proximal” relates to the parts of the burner facing the outside of the kiln.
  • the body 2 comprises a proximal portion 3; at the proximal portion 3 are provided the fluid inlet sections, i.e. the fuel and the oxidizing element. Moreover, the body 2 comprises a distal portion 4, opposite the proximal portion 3.
  • the burner comprises, in addition, a third port 7, for the entry of the fuel.
  • the burner 1 comprises a nozzle 8.
  • the nozzle 8 is connected to the body 2, at the distal portion 4 of the latter.
  • the nozzle 8 can be connected to the body 2 in a removable manner, e.g. with a connection of the flanged type.
  • the size and shape of the nozzle 8 can be modified to reach different areas inside the firing kiln, or to modify/optimize the behavior of the combustion products coming out of the burner 1.
  • the body 2 comprises, at its proximal portion 3, a first end 9.
  • the body 2 comprises, at its distal portion 4, a second end 10; more specifically, at least the second end 10 is flanged, and permits obtaining the connection with the nozzle 8.
  • a closure element 11 is connected to the first end 9 which can also be shaped as a flange.
  • the closure element 11 comprises the third port 7 for the fuel inlet.
  • the body 2 of the burner 1 comprises a first passageway 12 for the primary air.
  • the body 2 of the burner 1 comprises a second passageway 14 for the secondary air.
  • the second passageway 14 places the second port 6 in fluidic communication with a second outlet section 15 of the secondary air.
  • the burner 1 further comprises a fuel manifold 16.
  • the fuel can be for example natural gas, or even another fluid fuel suitable for the specific application of use of the burner 1.
  • the manifold 16 communicates with the third port 7; moreover, the manifold 16 comprises an end element 17, adapted to dispense the fuel gas.
  • the manifold 16 is arranged coaxial with the longitudinal axis A of the burner 1.
  • the end element 17 can comprise, for example, a number of holes 18 for the supply of combustible gas; such holes 18 can be arranged in different positions, e.g., parallel to the longitudinal axis A, or perpendicular to the latter, or yet in other positions.
  • the conformation of the end element 17 can however be any, in relation to specific functional requirements; also the conformation of the manifold 16 can be any.
  • the ignition means 19 are housed inside the body 2 of the burner 1; the ignition means 19 comprise a first connecting element 20, passing through a corresponding opening provided for in the closure element 11.
  • the burner 1 also comprises flame detection means 21.
  • the first passageway 12 and the second passageway 14 are separated from each other inside the body 2 by means of a partition 23.
  • the partition 23 has a tubular or substantially tubular conformation; more in detail, the partition 23 comprises - or consists of - a cylindrical or substantially cylindrical wall.
  • the first outlet section 13 - where the first passageway 12 ends - surrounds the end element 17 of the manifold 16; the second outlet section 15, where the second passageway 14 ends, is in turn located at the periphery of the first outlet section 13.
  • the burner 1 comprises a cage element 25, to which the partition 23 is connected, with its innermost or proximal end.
  • the cage element 25 is adapted to place the first port 5, provided in the lateral surface of the body 2, in communication with the inner volume of the partition 23, so as to create the first passageway 12.
  • the cage element 25 has an essentially cylindrical conformation; the cage element 25 comprises a plurality of lateral openings 26, which allow the primary air, coming from the first port 5, penetrating inside it.
  • the cage element 25 comprises a disc-shaped portion 27, having a larger diameter than that of its central part, which abuts at a respective shoulder 28 provided in the inner surface of the body 2.
  • the burner 1 comprises means for generating a turbine within the flow of the fuel-oxidizing element mixture, adapted to facilitate the process of mixing of the two gases.
  • the first diffuser 29 also comprises a plurality of further holes 31.
  • the holes 31 are distributed in the central area of the first diffuser 29. Furthermore, the first diffuser 29 comprises a central opening, which allows the end element 17 of the manifold 16 to come out.
  • the partition 23 has a length such as to protrude, for a certain distance, from the body 2 of the burner 1, and to penetrate inside the nozzle 8.
  • the turbine generating means also comprise a second diffuser 32.
  • the second diffuser 32 is associated with the distal opening, in use, of the body 2.
  • the second diffuser 32 is substantially circular crown-shaped, and therefore defines a central opening; at the inner edge of this central opening, the second diffuser 32 comprises a plurality of second slits 33.
  • the second slits 33 also define respective channels inclined with respect to the longitudinal axis A of the burner 1, so as to impart a certain tangential component to the air which passes through them.
  • the second diffuser 32 is positioned so that the tubular partition 23 passes through its central opening, i.e. passes through it.
  • the nozzle 8 has an essentially cylindrical conformation; it comprises a substantially flared divergent proximal region 34 for the connection to the distal portion 4 of the body 2.
  • the nozzle 8 comprises a convergent distal region 35, which defines the outflow port 36 from which the combustion products generated inside the burner 1 are adapted to flow out.
  • the first outlet section 13 and the second outlet section 15 are adapted to diffuse, respectively, the primary combustion air and the secondary combustion air inside the nozzle 8.
  • the first outlet section 13 and the second outlet section 15 are arranged on respective different planes with respect to the longitudinal axis A of the burner 1 (since the partition 23 exits from the body 2 by a certain length): therefore, the second outlet section 15 is further back with respect to the first outlet section 13, with reference to the direction of flow of the gases.
  • the burner 1 comprises a first duct 37 for the supply of primary air; the first duct 37 ends in the first port 5.
  • the burner 1 comprises a second duct 38 for the supply of secondary air; the second duct 38 ends in the second port 6.
  • the burner 1 comprises a substantially Y-shaped fitting 39, for the (primary and secondary) air inlet in the burner 1.
  • the first duct 37 and the second duct 38 make up the two divergent branches of the aforementioned fitting 39.
  • the fitting 39 comprises an air inlet opening 39a.
  • the first duct 37 has an orthogonal, or substantially orthogonal, axis to the longitudinal axis A of the burner 1.
  • the second duct 38 instead, has an inclined axis, by a certain angle, with respect to the longitudinal axis A of the burner, and therefore also with respect to the axis of the first duct 37.
  • the fitting 39 can be made in a single piece with the body 2, or it can be made as a separate element, associated with the body 2 with suitable connecting members.
  • the first regulation device 40 and the second regulation device 41 allow the primary and secondary air flow rates to be varied independently of one another.
  • the first regulation device 40 can comprise a first butterfly valve 42.
  • the butterfly valve solution is very simple and economical in design, and at the same time effective and reliable.
  • the first butterfly valve 42 and the second butterfly valve 43 are controlled by respective first, second operating members 44, 45.
  • the first, second operating members 44, 45 are e.g. of the manual type.
  • the outer casing of the fitting 39 (or more generally of the body 2) comprises, for each of the regulation devices 40, 41, a respective slot 48, substantially shaped as an arc of circumference.
  • the center of the circumference along which the slot 48 extends belongs to the axis of rotation of the respective valve 42, 43.
  • the primary air consequently reaches the first diffuser 29, passes through it and its trajectory is consequently diverted, obtaining a turbine that facilitates mixing with the fuel.
  • the primary air flow rate can be regulated, i.e. limited, by means of the first regulation device 40, in such a way as not to exceed the maximum critical value beyond which phenomena of turbulence could be generated in the central area of the nozzle 8, in the proximity of the fuel outlet.
  • the primary air flow rate is suitably limited, by means of the first regulation device 40, so as not to cause flame burn-out, and therefore the burner to shut down.
  • the burner 1 can also operate smoothly, and therefore in a problem-free way, with thermal powers lower than those achievable by burners of the known and currently used type.
  • the burner behaves as if it were provided with an air diffuser with variable geometry, easily controllable by adjusting the flow rate of the primary and secondary air respectively.
  • This embodiment differs from the previous one in terms of the shape of the first duct 37, for the supply of primary air, and of the second duct 38, for the supply of secondary air.
  • first duct 37 and the second duct 38 are completely separated from each other, and do not originate from a single fitting as in the previous embodiment.
  • the first duct 37 can be supplied with clean air, while the second duct 38 can be supplied with "dirty” or recycled air, coming from the same kiln/dryer or from other devices/systems.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Pre-Mixing And Non-Premixing Gas Burner (AREA)
  • Gas Burners (AREA)

Claims (11)

  1. Brenner (1) für Industrieöfen, Trockner und dergleichen, umfassend:
    einen Körper (2), der mit einem ersten Durchgang (12) für die Zufuhr von Verbrennungsprimärluft versehen ist und der in einem ersten Auslassabschnitt (13) endet,
    einen Sammler (16) für die Zufuhr von Kraftstoff, der mit einem Endelement (17) versehen ist, das zum Abgeben eines Gases ausgebildet ist und das von dem ersten Auslassabschnitt (13) umgeben ist,
    Zündmittel (19) für die Verbrennung eines Gemischs aus Kraftstoff und Luft, und eine Düse (8), die mit dem Körper (2) verbunden und mit einer Auslassöffnung (36) versehen ist, aus der die im Inneren des Brenners erzeugten Verbrennungsprodukte abfließen können,
    wobei der Körper (2) einen zweiten Durchgang (14) für die Zufuhr von Verbrennungssekundärluft umfasst, der in einem zweiten Auslassabschnitt (15) endet, der sich am Umfang des ersten Auslassabschnitts (13) befindet, wobei der erste Auslassabschnitt (13) und der zweite Auslassabschnitt (15) ausgebildet sind, die Primärluft bzw. die Sekundärluft in der Düse (8) zu verteilen,
    wobei der Brenner (1) eine erste Leitung (37) für die Zufuhr von Primärluft und eine zweite Leitung (38) für die Zufuhr von Sekundärluft umfasst,
    dadurch gekennzeichnet, dass die erste Leitung (37) eine erste Reguliervorrichtung (40) zum Regulieren der Primärluft-Durchflussrate und die zweite Leitung (38) eine zweite Reguliervorrichtung (41) zum Regulieren der Sekundärluft-Durchflussrate umfasst, und dadurch, dass er ein im Wesentlichen Y-förmiges Anschlussstück (39) umfasst, das mit einer Einlassöffnung (39a) für die Verbrennungsluft versehen ist,
    und wobei die erste Leitung (37) und die zweite Leitung (38) die beiden divergierenden Zweige des Y-förmigen Anschlussstücks bilden, wobei die erste Leitung (37) eine orthogonale oder im Wesentlichen orthogonale Achse in Bezug auf die Längsachse (A) des Brenners (1) aufweist und die zweite Leitung (38) eine geneigte Achse in Bezug auf die Längsachse (A) des Brenners (1) und somit auch in Bezug auf die Achse der ersten Leitung (37) aufweist.
  2. Brenner (1) nach Anspruch 1, wobei der erste Auslassabschnitt (13) und der zweite Auslassabschnitt (15) auf jeweils unterschiedlichen Ebenen in Bezug auf die Längsachse (A) des Brenners (1) angeordnet sind.
  3. Brenner (1) nach Anspruch 1 oder 2, wobei die erste Reguliervorrichtung (40) ein erstes Drosselklappenventil (42) umfasst und wobei die zweite Reguliervorrichtung (41) ein zweites Drosselklappenventil (43) umfasst.
  4. Brenner nach einem der vorhergehenden Ansprüche, wobei der erste Durchgang (12) und der zweite Durchgang (14) innerhalb des Körpers (2) durch eine rohrförmige Trennwand (23) voneinander getrennt sind, so dass zwischen dem Körper (2) und der Trennwand (23) ein Spalt (24) definiert ist, wobei der erste Durchgang (12) innerhalb der Trennwand (23) definiert ist und der zweite Durchgang (14) entlang des Spalts (24) definiert ist.
  5. Brenner (1) nach Anspruch 4, umfassend ein Käfigelement (25), mit dem die Trennwand (23) mit ihrem innersten oder proximalen Ende verbunden ist, wobei das Käfigelement (25) ausgebildet ist, eine erste Öffnung (5) für den Eintritt von Primärluft, die in der Seitenfläche des Körpers (2) vorgesehen ist, in Verbindung mit dem inneren Volumen der Trennwand (23) zu bringen, um den ersten Durchgang (12) zu bilden, wobei das Käfigelement (25) eine Vielzahl von seitlichen Öffnungen (26) aufweist, die es der von der ersten Öffnung (5) kommenden Primärluft ermöglichen, in das Innere einzudringen.
  6. Brenner (1) nach einem der Ansprüche 4, 5, umfassend Mittel zur Erzeugung einer Turbine innerhalb der Strömung des Kraftstoff-Oxidations-Elementgemisches, die ausgebildet sind, den Vorgang des Mischens der beiden Gase zu erleichtern, umfassend einen ersten Diffusor (29), der den ersten Auslassabschnitt (13) definiert und im Betrieb mit dem distalen Ende der Trennwand (23) verbunden ist, und einen zweiten Diffusor (32), der den zweiten Auslassabschnitt (15) definiert und eine zentrale Öffnung aufweist, durch die sich die Trennwand (23) erstreckt.
  7. Brenner (1) nach dem vorhergehenden Anspruch 6, wobei der erste Diffusor (29) im Wesentlichen scheibenförmig ist und entlang seiner äußeren Seitenfläche eine Vielzahl von ersten Umfangsschlitzen (30) aufweist.
  8. Brenner (1) nach einem der vorhergehenden Ansprüche 6 oder 7, wobei der zweite Diffusor (32) im Wesentlichen kreiskronenförmig ist und eine zentrale Öffnung definiert, der an dem inneren Rand der zentralen Öffnung mit einer Vielzahl von zweiten Schlitzen (33) versehen ist.
  9. Brenner (1) nach einem der Ansprüche 3-8, wobei das erste Drosselklappenventil (42) und das zweite Drosselklappenventil (43) durch ein erstes bzw. zweites Betätigungselement (44, 45) der manuellen Art gesteuert sind.
  10. Brenner (1) nach dem vorhergehenden Anspruch, wobei die Betätigungselemente (44, 45) für jedes der Drosselklappenventile (42, 43) einen kleinen Arm (46) umfassen, dessen eines Ende mit der Drehachse des Ventils (42, 43) verriegelt ist, wobei das gegenüberliegende Ende des kleinen Arms (46) einen Knauf (47) aufweist, der dem kleinen Arm (46) mittels mit Gewinde versehenen Verbindungselementen zugeordnet ist, die es ermöglichen, ihn in Bezug auf den kleinen Arm (46) auf- und abzuschrauben.
  11. Brenner (1) nach dem vorhergehenden Anspruch, wobei das äußere Gehäuse des Körpers (2) für jede der Reguliervorrichtungen (40, 41) einen entsprechenden Schlitz (48) aufweist, der im Wesentlichen als ein Umfangsbogen geformt ist, dessen Mittelpunkt zu der Drehachse des jeweiligen Drosselklappenventils (42, 43) gehört, und der ausgebildet ist, die Drehung des Knaufes (47) zu führen, um die Position des Drosselklappenventils (42, 43) zu regulieren, wobei der Knauf (47) ausgebildet ist, das entsprechende Drosselklappenventil (42, 43) in der gewünschten Position mittels ihrer Verschraubung durch Reibung zu verriegeln, um mit der Außenfläche des Gehäuses des Körpers (2) in Kontakt zu kommen.
EP19756253.1A 2018-07-10 2019-07-09 Brenner für industrieöfen, trockner und dergleichen Active EP3821173B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT201800007091 2018-07-10
PCT/IB2019/055825 WO2020012347A1 (en) 2018-07-10 2019-07-09 Burner for industrial kilns, dryers and the like

Publications (3)

Publication Number Publication Date
EP3821173A1 EP3821173A1 (de) 2021-05-19
EP3821173C0 EP3821173C0 (de) 2023-12-20
EP3821173B1 true EP3821173B1 (de) 2023-12-20

Family

ID=63834407

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19756253.1A Active EP3821173B1 (de) 2018-07-10 2019-07-09 Brenner für industrieöfen, trockner und dergleichen

Country Status (3)

Country Link
EP (1) EP3821173B1 (de)
ES (1) ES2971983T3 (de)
WO (1) WO2020012347A1 (de)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1238713B (it) * 1990-04-20 1993-09-01 Ente Naz Energia Elettrica Bruciatore perfezionato per olio e gas combustibili a bassa produzione di ossidi di azoto.
ITFI980069A1 (it) * 1998-03-25 1999-09-25 Enel Spa Bruciatore innovativo per combustibili liquidi e gassosi a bassa produzione di ossidi di azoto
US7549858B2 (en) * 2006-12-04 2009-06-23 Praxair Technology, Inc. Combustion with variable oxidant low NOx burner
ES2535111T3 (es) * 2010-04-16 2015-05-05 Ammann Italy S.P.A. Quemador de combustible dual para cilindros secadores y procedimiento de uso del mismo
CN103277795B (zh) * 2013-05-27 2015-05-20 中国科学院广州能源研究所 可调节烟气自身再循环燃气燃烧器

Also Published As

Publication number Publication date
ES2971983T3 (es) 2024-06-10
EP3821173A1 (de) 2021-05-19
WO2020012347A1 (en) 2020-01-16
EP3821173C0 (de) 2023-12-20
BR112021000319A2 (pt) 2021-04-06

Similar Documents

Publication Publication Date Title
US4963089A (en) High turndown burner with integral pilot
JPS6222726Y2 (de)
RU2262638C2 (ru) Камера предварительного смешивания для газовых турбин
US5573396A (en) Low emissions burner
RU98107161A (ru) Горелка и устройство внутреннего сгорания с горелкой
KR20010070378A (ko) 가스 버너 조립체 및 가스 취사 설비
US4298337A (en) Fuel burner having flame stabilization by internal recirculation
US9841189B2 (en) Lean premix burner having center gas nozzle
RU2425288C1 (ru) Газовая горелка для варочной панели
EA001292B1 (ru) Горелка
EP3821173B1 (de) Brenner für industrieöfen, trockner und dergleichen
US3179152A (en) Combination oil and gas burner
JPH06341611A (ja) 燃焼からのＮＯｘ放出量を最小限に抑える方法およびバーナ
CN103759263B (zh) 一种纯氧工艺气燃烧器
US4106890A (en) Air deflector
US3672808A (en) Method and apparatus of continuous steam-atomizing fuel combustion for boiler furnace
US5993199A (en) Turbo-flame burner design
BR112021000319B1 (pt) Queimador para fornos, secadores industriais e semelhantes
CN104854404B (zh) 燃烧器
US5762490A (en) Premixed gas burner orifice
CN116202089A (zh) 一种多种类废气废液混烧燃烧器及其使用方法
JP2001116214A (ja) 三位置制御バーナ
RU2412398C2 (ru) Низконапорная прямоточно-вихревая горелка
JP6748703B2 (ja) 高い調整率を有するガス燃焼式ボイラ
US12618555B2 (en) Adjustable burner nozzle for multiple fuels

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: UNKNOWN

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

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

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20210208

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20230718

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602019043616

Country of ref document: DE

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

U01 Request for unitary effect filed

Effective date: 20240118

U07 Unitary effect registered

Designated state(s): AT BE BG DE DK EE FI FR IT LT LU LV MT NL PT SE SI

Effective date: 20240126

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

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: 20240321

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

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: 20240321

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: RS

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: 20231220

Ref country code: NO

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: 20240320

Ref country code: HR

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: 20231220

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2971983

Country of ref document: ES

Kind code of ref document: T3

Effective date: 20240610

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IS

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: 20240420

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CZ

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: 20231220

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SK

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: 20231220

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SM

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: 20231220

Ref country code: SK

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: 20231220

Ref country code: RO

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: 20231220

Ref country code: IS

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: 20240420

Ref country code: CZ

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: 20231220

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PL

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: 20231220

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PL

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: 20231220

U20 Renewal fee for the european patent with unitary effect paid

Year of fee payment: 6

Effective date: 20240726

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602019043616

Country of ref document: DE

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

Effective date: 20240923

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

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: 20231220

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20240709

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20240731

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20240709

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20240709

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20250901

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20190709

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20190709

U90 Renewal fees not paid: noting of loss of rights

Free format text: RENEWAL FEE NOT PAID FOR YEAR 07

Effective date: 20260223