ES2576870T3 - A burner with high flame stability, particularly for the heat treatment of ceramic articles - Google Patents
A burner with high flame stability, particularly for the heat treatment of ceramic articles Download PDFInfo
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- ES2576870T3 ES2576870T3 ES10761020.6T ES10761020T ES2576870T3 ES 2576870 T3 ES2576870 T3 ES 2576870T3 ES 10761020 T ES10761020 T ES 10761020T ES 2576870 T3 ES2576870 T3 ES 2576870T3
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- 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
- F23C7/004—Combustion apparatus characterised by arrangements for air supply the air being submitted to a rotary or spinning motion using vanes
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- 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
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- 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
- F23D14/46—Details, e.g. noise reduction means
- F23D14/70—Baffles or like flow-disturbing devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
- F23D2900/11402—Airflow diaphragms at burner nozzle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
- F23D2900/11403—Flame surrounding tubes in front of burner nozzle
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- 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)
Abstract
Un quemador (1) con alta estabilidad de llama, particularmente para el tratamiento térmico de artículos cerámicos, que comprende un cuerpo de soporte (2) provisto de al menos una primera lumbrera (4) para el flujo entrante de un fluido oxidante y con al menos una segunda lumbrera (5) para el flujo entrante de un fluido combustible, y un cabezal de combustión (7) que se asocia con dicho cuerpo de soporte (2) y, en su región central, está provisto de medios de tobera (8) que se asocian con dicha segunda lumbrera (5), para el flujo saliente del combustible fluido en una región de combustión (9) y, en su región periférica, con un anular difusor (14) provisto de una pluralidad de aberturas pasantes (15) para orientar el flujo del fluido oxidante hacia dicha región de combustión, en donde los medios de tobera (8) comprenden un elemento terminal (12) que tiene un extremo cerrado y una pared lateral en la que, próxima a dicha extremo cerrado, se forma una pluralidad de orificios (13) que se orientan radialmente y se distribuyen a lo largo de una circunferencia, para el flujo saliente del combustible fluido; en donde dicho difusor (14) comprende un segundo grupo de dichas aberturas (15), que se disponen en su región periférica y cada una de las cuales comprende una hendidura correspondiente (15c), que se forma a lo largo de un plano que se inclina con respecto al plano de disposición de dicho difusor; caracterizado por que al menos una de dichas aberturas (15) comprende una ranura (15a), que se proporciona dentro de dicho difusor (14) y tiene una extensión a lo largo de una primera dimensión transversal que es sustancialmente más grande que la extensión a lo largo de una segunda dirección que es transversal a la primera dirección; dicha ranura (15a) tiene un perímetro cerrado y una forma alargada que define un arco de circunferencia centrado en el eje longitudinal (A) del quemador (1).A burner (1) with high flame stability, particularly for the heat treatment of ceramic articles, comprising a support body (2) provided with at least one first port (4) for the incoming flow of an oxidizing fluid and with the less a second port (5) for the inflow of a combustible fluid, and a combustion head (7) that is associated with said support body (2) and, in its central region, is provided with nozzle means (8 ) that are associated with said second port (5), for the outgoing flow of fluid fuel in a combustion region (9) and, in its peripheral region, with an annular diffuser (14) provided with a plurality of through openings (15 ) to orient the flow of the oxidizing fluid towards said combustion region, wherein the nozzle means (8) comprise a terminal element (12) having a closed end and a side wall in which, close to said closed end, is forms a plurality of holes (13) that are drilled They are oriented radially and distributed along a circumference, for the outgoing flow of fluid fuel; wherein said diffuser (14) comprises a second group of said openings (15), which are arranged in its peripheral region and each one of which comprises a corresponding slit (15c), which is formed along a plane that is inclines with respect to the plane of arrangement of said diffuser; characterized in that at least one of said openings (15) comprises a slot (15a), which is provided within said diffuser (14) and has an extension along a first transverse dimension that is substantially larger than the extension a along a second direction that is transverse to the first direction; said slot (15a) has a closed perimeter and an elongated shape that defines an arc of circumference centered on the longitudinal axis (A) of the burner (1).
Description
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DESCRIPCIONDESCRIPTION
Un quemador con alta estabilidad de llama, particularmente para el tratamiento termico de artlculos ceramicos Campo tecnicoA burner with high flame stability, particularly for the thermal treatment of ceramic items Technical field
La presente invencion se refiere a un quemador con alta estabilidad de llama, particularmente para el tratamiento termico de artlculos ceramicos.The present invention relates to a burner with high flame stability, particularly for the thermal treatment of ceramic articles.
Antecedentes de la tecnicaBackground of the technique
Con referencia particular, pero no exclusiva, al sector ceramico, se sabe que los aparatos para el tratamiento termico de artlculos, tales como hornos y secadores, generalmente usan quemadores de gas por aire soplado para calentar la camara para procesar dichos artlculos.With particular, but not exclusive, reference to the ceramic sector, it is known that devices for the thermal treatment of articles, such as ovens and dryers, generally use gas burners by blown air to heat the chamber to process said articles.
Dichos quemadores estan constituidos generalmente por un cuerpo de soporte que define una camara de admision que se comunica con una camara de combustion por medio de un cabezal de combustion. La camara de admision esta provista de una lumbera conectada a un suministro de aire y discurre alrededor de un conducto para suministrar el gas combustible que termina en el cabezal de combustion, que esta provisto de una pluralidad de toberas pare el flujo saliente del gas combustible. El propio aire fluye libremente alrededor del conducto para suministrar el gas hacia el cabezal de combustion mencionado anteriormente, que comprende un difusor que esta provisto de una pluralidad de aberturas pasantes para orientar el flujo de aire que fluye a la camara de combustion para obtener la mezcla con el gas combustible que fluye saliendo de las toberas del cabezal de combustion.Said burners generally consist of a support body that defines an intake chamber that communicates with a combustion chamber by means of a combustion head. The intake chamber is provided with a louver connected to an air supply and runs around a conduit to supply the combustible gas that ends at the combustion head, which is provided with a plurality of nozzles for the outgoing flow of the combustible gas. The air itself flows freely around the conduit to supply the gas to the combustion head mentioned above, which comprises a diffuser that is provided with a plurality of through openings to orient the flow of air flowing to the combustion chamber to obtain the mixture. with the combustible gas flowing out of the nozzles of the combustion head.
El difusor del cabezal de combustion esta constituido generalmente por una placa anular que se dispone en un plano perpendicular al conducto para suministrar el gas combustible. Una primera cara de la placa se orienta por lo tanto hacia la camara de admision, mientras que la segunda cara, en el lado opuesto a la primera cara, se orienta hacia la camara de combustion. Las aberturas mencionadas anteriormente penetran el grosor entero del difusor, discurriendo desde la primera a la segunda cara.The diffuser of the combustion head is generally constituted by an annular plate that is arranged in a plane perpendicular to the conduit for supplying the combustible gas. A first face of the plate is therefore oriented towards the intake chamber, while the second face, on the side opposite the first face, is oriented towards the combustion chamber. The openings mentioned above penetrate the entire thickness of the diffuser, running from the first to the second face.
En el centro del difusor, el cabezal de combustion tiene un elemento tubular, un extremo del cual se une al conducto de suministro de gas y el otro extremo del cual, orientado hacia la camara de combustion, esta cerrado y provisto de una pluralidad de toberas para que el gas fluya fuera. Este elemento tubular puede ser integral con el propio difusor o se puede conectar de manera retirable a el para permitir el montaje de elementos de conexion alternativos con forma diferente segun el tipo de gas combustible usado.In the center of the diffuser, the combustion head has a tubular element, one end of which joins the gas supply conduit and the other end of which, oriented towards the combustion chamber, is closed and provided with a plurality of nozzles for the gas to flow out. This tubular element can be integral with the diffuser itself or can be removably connected to it to allow the assembly of alternative connection elements with different shapes depending on the type of fuel gas used.
El difusor generalmente esta provisto de una pluralidad de orificios pasantes circulares, dispuestos a lo largo de al menos una circunferencia proxima al centro, los ejes respectivos de la cual se inclinan para converger en la extension del eje longitudinal del conducto de suministro de gas a lo largo de la camara de combustion, que permite un flujo lineal del aire en la camara de combustion.The diffuser is generally provided with a plurality of circular through holes, arranged along at least one circumference near the center, the respective axes of which are inclined to converge on the extension of the longitudinal axis of the gas supply conduit at along the combustion chamber, which allows a linear flow of air into the combustion chamber.
El difusor tambien tiene una pluralidad de hendiduras formadas en su region periferica segun planos que se inclinan con respecto al eje longitudinal, para dar la cantidad de aire que pasa a traves de ellas un movimiento helicoidal a lo largo de la camara de combustion.The diffuser also has a plurality of grooves formed in its peripheral region according to planes that are inclined with respect to the longitudinal axis, to give the amount of air that passes through them a helical movement along the combustion chamber.
Estos quemadores pueden estar provistos de un conducto extremo que esta abierto en un extremo, asociado con el cuerpo de soporte y dentro del cual se acomoda el cabezal de combustion, y que forma la camara de combustion. Tambien se puede proporcionar, dentro del cuerpo de soporte, un elemento tubular para transmitir el aire hacia el cabezal de combustion. Un quemador que tiene las caracterlsticas especificadas en el preambulo de la reivindicacion 1 se conoce del documento dE 19925276 A1.These burners may be provided with an end conduit that is open at one end, associated with the support body and into which the combustion head is accommodated, and which forms the combustion chamber. A tubular element can also be provided within the support body to transmit the air to the combustion head. A burner having the characteristics specified in the preamble of claim 1 is known from document 19925276 A1.
Estos quemadores del tipo conocido no carecen de inconvenientes, entre los que esta el hecho de que no hacen posible obtener una mezcla optima del aire y el gas combustible, particularmente con flujos de gas reducidos, provocando as! la formacion de sustancias inquemadas con un rendimiento ineficiente consecuente de la combustion, y no aseguran estabilidad de la llama en situaciones en las que el sistema de combustion funciona con flujos de gas que estan cerca del nivel mlnimo. Ademas, los orificios formados proximos al centro del difusor tienden a ensuciarse y obstruirse con el tiempo debido al uso de aire recuperado y no filtrado, necesitando as! actividades periodicas de mantenimiento y/o sustitucion y exhibiendo as! un rapido descenso de los niveles de prestaciones entre una intervencion y la siguiente.These burners of the known type are not without disadvantages, among which is the fact that they do not make it possible to obtain an optimal mixture of air and combustible gas, particularly with reduced gas flows, thus causing! the formation of unburned substances with an inefficient efficiency resulting from combustion, and do not ensure flame stability in situations where the combustion system works with gas flows that are close to the minimum level. In addition, the holes formed near the center of the diffuser tend to get dirty and clogged over time due to the use of recovered and unfiltered air, thus needing! periodic maintenance and / or replacement activities and exhibiting as well! a rapid decrease in benefit levels between one intervention and the next.
Descripcion de la invencionDescription of the invention
La meta de la presente invencion es eliminar los inconvenientes mencionados anteriormente de la tecnica conocida, proporcionando un quemador con alta estabilidad de llama, particularmente para el tratamiento termico de artlculos ceramicos que hace posible obtener una mezcla optima del aire y el gas combustible, independientemente de la relacion de los flujos suministrados, y que asegura estabilidad de llama incluso en condiciones de funcionamiento con flujos de gas mlnimos.The goal of the present invention is to eliminate the aforementioned drawbacks of the known technique, by providing a burner with high flame stability, particularly for the thermal treatment of ceramic articles that makes it possible to obtain an optimal mixture of air and combustible gas, regardless of the ratio of the flows supplied, and that ensures flame stability even in operating conditions with minimal gas flows.
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Dentro de esta meta, un objeto de la presente invencion es ser eficiente y de larga duracion incluso con el uso de aire caliente recuperado.Within this goal, an object of the present invention is to be efficient and long lasting even with the use of recovered hot air.
Un objeto adicional de la presente invencion es proporcionar una estructura simple, que sea relativamente facil y practica de implementar, segura de usar y eficaz en funcionamiento, y que tenga costes relativamente bajos.A further object of the present invention is to provide a simple structure, which is relatively easy and practical to implement, safe to use and effective in operation, and which has relatively low costs.
Esta meta y estos y otros objetos, que se haran mas evidentes en lo sucesivo, se logran mediante el presente quemador con alta estabilidad de llama, particularmente para el tratamiento termico de artlculos ceramicos, que comprende las caracterlsticas especificadas en la reivindicacion 1.This goal and these and other objects, which will become more apparent hereinafter, are achieved by means of the present burner with high flame stability, particularly for the thermal treatment of ceramic articles, which comprises the characteristics specified in claim 1.
Breve descripcion de los dibujosBrief description of the drawings
Caracterlsticas y ventajas adicionales de la presente invencion se haran mas evidentes a partir de la siguiente descripcion detallada de una realizacion preferida pero no exclusiva de un quemador con alta estabilidad de llama, particularmente para el tratamiento termico de artlculos ceramicos, ilustrada a modo de ejemplo no limitativo en los dibujos adjuntos, en donde:Additional features and advantages of the present invention will become more apparent from the following detailed description of a preferred but not exclusive embodiment of a burner with high flame stability, particularly for the thermal treatment of ceramic articles, illustrated by way of example no limiting in the accompanying drawings, where:
La figura 1 es una vista de proyeccion en perspectiva esquematica de un quemador segun la invencion;Figure 1 is a schematic perspective projection view of a burner according to the invention;
La figura 2 es una vista en seccion transversal longitudinal esquematica del quemador de la figura 1;Figure 2 is a schematic longitudinal cross-sectional view of the burner of Figure 1;
La figura 3 es una vista de proyeccion en perspectiva esquematica del cabezal de combustion del quemador segun la invencion;Figure 3 is a schematic perspective projection view of the combustion head of the burner according to the invention;
La figura 4 es una vista delantera esquematica del difusor cabezal de combustion del quemador segun la invencion; La figura 5 es una vista en planta esquematica del difusor de la figura 4.Figure 4 is a schematic front view of the burner combustion head diffuser according to the invention; Figure 5 is a schematic plan view of the diffuser of Figure 4.
Maneras para llevar a cabo la invencionWays to carry out the invention
Con referencia a las figuras, el numeral de referencia 1 designa generalmente un quemador con alta estabilidad de llama, particularmente para el tratamiento termico de artlculos ceramicos.With reference to the figures, reference numeral 1 generally designates a burner with high flame stability, particularly for the thermal treatment of ceramic articles.
Ciertamente, el quemador 1 esta disenado especlficamente para aplicacion en aparatos para el tratamiento termico de artlculos ceramicos, tales como hornos y secadores.Certainly, the burner 1 is specifically designed for application in apparatus for the thermal treatment of ceramic articles, such as ovens and dryers.
El quemador 1 comprende un cuerpo de soporte 2 que es internamente hueco para formar una camara de admision 3.The burner 1 comprises a support body 2 that is internally hollow to form an intake chamber 3.
El cuerpo de soporte 2 esta provisto de al menos una primera lumbrera 4 para el flujo entrante de un fluido oxidante y con al menos una segunda lumbrera 5 para el flujo entrante de un fluido combustible.The support body 2 is provided with at least a first port 4 for the incoming flow of an oxidizing fluid and with at least a second port 5 for the incoming flow of a combustible fluid.
La primera lumbrera 4 se puede conectar a un sistema de ventilacion para soplar el fluido oxidante, constituido generalmente por aire, posiblemente reciclado por el mismo aparato en el que se aplica el quemador 1.The first port 4 can be connected to a ventilation system to blow the oxidizing fluid, generally constituted by air, possibly recycled by the same apparatus in which the burner 1 is applied.
El fluido combustible esta preferiblemente en estado gaseoso, tal como metano y similares.The combustible fluid is preferably in a gaseous state, such as methane and the like.
El cuerpo de soporte 2 se fija a un reborde 6 para fijarse a la estructura del aparato al que se aplica el quemador 1.The support body 2 is fixed to a flange 6 to be fixed to the structure of the apparatus to which the burner 1 is applied.
El quemador 1 tambien comprende un cabezal de combustion 7 que, en su region central, esta provisto de medios de tobera 8 que se asocian con la segunda lumbrera 5, para el flujo saliente del combustible fluido en una region de combustion 9 por medio de medios 10 para suministrar dicho fluido.The burner 1 also comprises a combustion head 7 which, in its central region, is provided with nozzle means 8 that are associated with the second port 5, for the outgoing flow of the fluid fuel in a combustion region 9 by means 10 to supply said fluid.
Los medios de suministro 10 estan constituidos sustancialmente por un conducto 11 que se inserta pasando a traves del interior del cuerpo de soporte 2 y alrededor del que discurre la camara de admision 3.The supply means 10 are substantially constituted by a conduit 11 which is inserted through the interior of the support body 2 and around which the intake chamber 3 runs.
El conducto 11 tiene un primer extremo unido a la segunda lumbrera 5 y un segundo extremo, opuesto al primero, conectado a los medios de tobera 8. En la presente descripcion el eje longitudinal A del quemador 1 esta pensado para ser el eje a lo largo del que discurre el conducto 11.The conduit 11 has a first end attached to the second port 5 and a second end, opposite the first, connected to the nozzle means 8. In the present description the longitudinal axis A of the burner 1 is intended to be the axis along from which the duct runs 11.
Los medios de tobera 8 comprenden un elemento terminal 12 que es sustancialmente cillndrico, un extremo del cual esta abierto y conectado al segundo extremo del conducto 11 y el otro extremo del cual esta cerrado. Proxima al extremo cerrado, en la pared lateral del elemento terminal 12, se forma una pluralidad de orificios 13 que se orientan radialmente y se distribuyen a lo largo de una circunferencia, para el flujo saliente del fluido combustible.The nozzle means 8 comprises a terminal element 12 that is substantially cylindrical, one end of which is open and connected to the second end of the conduit 11 and the other end of which is closed. Near the closed end, on the side wall of the terminal element 12, a plurality of holes 13 are formed that are radially oriented and distributed along a circumference, for the outgoing flow of the fuel fluid.
El cabezal de combustion 7 tambien comprende, en su region periferica, un difusor anular 14 que esta provisto de una pluralidad de aberturas pasantes 15 para orientar el flujo de fluido oxidante que, desde la camara de admision 3, llega a la zona de combustion 9 pasando a traves de las aberturas.The combustion head 7 also comprises, in its peripheral region, an annular diffuser 14 which is provided with a plurality of through openings 15 to guide the flow of oxidizing fluid that, from the intake chamber 3, reaches the combustion zone 9 passing through the openings.
El plano del difusor 14 es perpendicular con respecto al eje longitudinal A.The plane of the diffuser 14 is perpendicular with respect to the longitudinal axis A.
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Al menos una de las aberturas 15 comprende una ranura 15a, que tiene un perlmetro cerrado y se forma dentro del difusor 14, y que tiene una extension a lo largo de una primera direccion que es sustancialmente mas grande que la extension a lo largo de una segunda dimension que es transversal a la primera.At least one of the openings 15 comprises a groove 15a, which has a closed perimeter and is formed within the diffuser 14, and which has an extension along a first direction that is substantially larger than the extension along a length. second dimension that is transverse to the first.
Ventajosamente, la forma alargada de la ranura 15a hace posible reducir las perdidas de altura manometrica del fluido oxidante, con respecto a cabezales de combustion tradicionales, asegurando una capacidad y velocidad de flujo adecuadas del fluido oxidante. Ademas, la anchura de la ranura 15a reduce los fenomenos de su contamination y su obstruction, haciendo as! posible suministrar al quemador 1 aire recuperado y sin filtrar sin necesidad de intervenciones frecuentes para limpiar y/o sustituir el cabezal de combustion 7.Advantageously, the elongated shape of the groove 15a makes it possible to reduce the manometric height losses of the oxidizing fluid, with respect to traditional combustion heads, ensuring adequate capacity and flow rate of the oxidizing fluid. In addition, the width of the groove 15a reduces the phenomena of its contamination and its obstruction, doing so! It is possible to supply the burner with 1 recovered and unfiltered air without the need for frequent interventions to clean and / or replace the combustion head 7.
El extremo cerrado del elemento terminal 12 sobresale axialmente hacia la zona de combustion 9 con respecto al difusor 14, de modo que los orificios 13 se colocan con respecto al difusor 14 hacia la zona de combustion.The closed end of the terminal element 12 protrudes axially towards the combustion zone 9 with respect to the diffuser 14, so that the holes 13 are positioned with respect to the diffuser 14 towards the combustion zone.
Con mas precision, el difusor 14 esta provisto de un primer grupo de aberturas 15 dispuestas proximas a los medios de tobera 8 que comprenden la ranura mencionada anteriormente 15a que tiene una forma para definir un arco de circunferencia centrado en el eje longitudinal A.More precisely, the diffuser 14 is provided with a first group of openings 15 arranged close to the nozzle means 8 comprising the aforementioned groove 15a having a shape to define an arc of circumference centered on the longitudinal axis A.
Esta ranura 15a tiene una extension angular de entre 90° y 150° y preferiblemente 120°.This slot 15a has an angular extension between 90 ° and 150 ° and preferably 120 °.
Ademas, la ranura 15a se forma segun una pared conica que converge en el eje longitudinal A, en la zona de combustion 9, con un angulo comprendido entre 2° y 5°, para orientar el flujo de fluido oxidante hacia este eje.In addition, the groove 15a is formed according to a conical wall that converges on the longitudinal axis A, in the combustion zone 9, at an angle between 2 ° and 5 °, to orient the flow of oxidizing fluid towards this axis.
Preferiblemente, dos de las ranuras mencionadas anteriormente 15a, de este primer grupo de aberturas 15, se disponen en lados diametralmente opuestos de los medios de tobera 8 y una pluralidad de orificios pasantes 15b se interpone entre ellos y se distribuyen a lo largo de la circunferencia trazada por las ranuras.Preferably, two of the aforementioned grooves 15a, of this first group of openings 15, are arranged on diametrically opposite sides of the nozzle means 8 and a plurality of through holes 15b is interposed between them and distributed along the circumference traced by the grooves.
Los orificios pasantes 15b tambien se forman segun ejes que se inclinan con respecto al eje longitudinal A, con el angulo mencionado anteriormente comprendido entre 2° y 5° y convergiendo en la zona de combustion 9.The through holes 15b are also formed according to axes that are inclined with respect to the longitudinal axis A, with the aforementioned angle between 2 ° and 5 ° and converging in the combustion zone 9.
El paso a traves de la ranuras 15a y los orificios pasantes 15b da al flujo de fluido oxidante una progresion linear.The passage through the grooves 15a and the through holes 15b gives the flow of oxidizing fluid a linear progression.
El difusor 14 tambien esta provisto de un segundo grupo de aberturas 15 que se forman en su region periferica y cada una de las cuales esta constituida por una hendidura 15c que se forma segun un plano que se inclina con respecto al plano del difusor con un angulo. Ventajosamente, el angulo esta comprendido entre 30° y 60° y preferiblemente 45°.The diffuser 14 is also provided with a second group of openings 15 that are formed in its peripheral region and each of which is constituted by a groove 15c that is formed according to a plane that inclines with respect to the plane of the diffuser with an angle . Advantageously, the angle is between 30 ° and 60 ° and preferably 45 °.
Estas hendiduras 15c orientan el flujo del fluido oxidante que pasa a traves de ellas con un movimiento helicoidal, optimizando as! la mezcla en la zona de combustion 9.These grooves 15c guide the flow of the oxidizing fluid that passes through them with a helical movement, thus optimizing! the mixture in the combustion zone 9.
Cabe senalar que los quemadores 1 se disenan para ser usados principalmente en aparatos que estan provistos de sistemas para ventilation de flujo fijo del fluido oxidante (aire) y sistemas para distribution de flujo variable del combustible fluido. Por lo tanto lo que se debe obtener es un flujo de fluido oxidante en la zona de combustion 9 que se adapte para asegurar un suministro de oxlgeno suficiente para lograr una combustion completa de cualquier flujo de fluido combustible.It should be noted that the burners 1 are designed to be used primarily in apparatus that are provided with systems for fixed flow ventilation of the oxidizing fluid (air) and systems for variable flow distribution of the fluid fuel. Therefore, what must be obtained is an oxidizing fluid flow in the combustion zone 9 that is adapted to ensure a sufficient oxygen supply to achieve a complete combustion of any combustible fluid flow.
Ademas, si se usa aire caliente recuperado como fluido oxidante, se deben suministrar flujos de volumenes mayores que en el caso en el que se usa aire limpio, para obtener el mismo suministro de oxlgeno en la zona de combustion 9.In addition, if recovered hot air is used as an oxidizing fluid, larger volume flows should be supplied than in the case where clean air is used, to obtain the same supply of oxygen in the combustion zone 9.
En este sentido, la geometrla del difusor 14 se ha optimizado y, preferiblemente, el conjunto de hendiduras 15c afecta a una parte que es igual al 20 %-30 % (preferiblemente 25 %) de la superficie anular del difusor.In this sense, the geometry of the diffuser 14 has been optimized and, preferably, the set of grooves 15c affects a part that is equal to 20% -30% (preferably 25%) of the annular surface of the diffuser.
Cabe senalar que, dada la inclination de las hendiduras 15c, la anchura circunferencial maxima se debe determinar en relation al grosor del difusor 14 para prevenir el paso directo del flujo de fluido oxidante en la direccion axial.It should be noted that, given the inclination of the grooves 15c, the maximum circumferential width should be determined in relation to the thickness of the diffuser 14 to prevent the direct passage of the flow of oxidizing fluid in the axial direction.
El quemador 1, en esta realization, permite una mezcla combinada, axial y centrlfuga, en la zona de combustion 9.The burner 1, in this embodiment, allows a combined axial and centrifugal mixture in the combustion zone 9.
Sin embargo, no se excluye la posibilidad de que el difusor 14 este provisto de aberturas 15 que sean exclusivamente del tipo ranura 15a, obteniendo as! una mezcla que es meramente axial. Esta posibilidad, sin embargo, no esta cubierta por la presente invencion.However, the possibility that the diffuser 14 is provided with openings 15 that are exclusively of the slot type 15a, thus obtaining! a mixture that is merely axial. This possibility, however, is not covered by the present invention.
El quemador 1 tambien esta provisto de un electrodo de ignition 16 y un sensor 17 para monitorizar la combustion, ambos de tipo tradicional y, por lo tanto, no descritos en detalle.The burner 1 is also provided with an ignition electrode 16 and a sensor 17 for monitoring combustion, both of the traditional type and, therefore, not described in detail.
El electrodo de ignicion 16 y el sensor de monitorizacion 17 se disponen en alineacion con el eje longitudinal A y se insertan a traves del difusor 14 respectivamente en asientos pasantes 18, terminando en la zona de combustion 9.The ignition electrode 16 and the monitoring sensor 17 are arranged in alignment with the longitudinal axis A and are inserted through the diffuser 14 respectively in through seats 18, ending in the combustion zone 9.
En unos de los orificios 15b, se puede insertar un barrote metalico, que no se muestra, que sobresale hacia la zona de combustion 9, y coopera con el electrodo de ignicion 16 para el mantenimiento de la llama.In one of the holes 15b, a metal bar, which is not shown, protruding towards the combustion zone 9, can be inserted and cooperates with the ignition electrode 16 for the maintenance of the flame.
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El quemador 1, preferiblemente, tiene un elementos tubular 19 para confinar la zona de combustion 9, que se asocia con el cuerpo de soporte 2 y a lo largo del que se dispone el cabezal de combustion 7.The burner 1 preferably has a tubular elements 19 to confine the combustion zone 9, which is associated with the support body 2 and along which the combustion head 7 is arranged.
El elementos tubular 19 se extiende a lo largo del eje longitudinal A y su extremo abierto 20 se disena para disponerse dentro de la camara calentada del aparato en la que se monta el quemador 1.The tubular elements 19 extend along the longitudinal axis A and its open end 20 is designed to be disposed within the heated chamber of the apparatus in which the burner 1 is mounted.
La colocacion longitudinal del cabezal de combustion 7 a lo largo del elemento tubular 19 puede ser diferente, es decir, mas cercana o mas alejada del extremo abierto 20, segun las necesidades de la aplicacion especlfica. Ademas, se pueden proporcionar medios para ajustar la posicion longitudinal del cabezal de combustion 7 a lo largo del elemento tubular 19, que no se muestra en las figuras.The longitudinal placement of the combustion head 7 along the tubular element 19 may be different, that is, closer or further away from the open end 20, according to the needs of the specific application. In addition, means can be provided to adjust the longitudinal position of the combustion head 7 along the tubular element 19, which is not shown in the figures.
El quemador 1 tambien puede tener un elemento de transferencia 21 que se asocia dentro del cuerpo de soporte 2 para dirigir el flujo del fluido oxidante hacia el difusor 14.The burner 1 may also have a transfer element 21 that is associated within the support body 2 to direct the flow of the oxidizing fluid to the diffuser 14.
Este elemento de transferencia 21 puede estar constituido por una funda tubular que se dispone dentro de la camara de admision 3 a lo largo del eje longitudinal A y se extiende dentro del elemento tubular 19, con un extremo conectado al fondo 2a del cuerpo de soporte 2 y el otro extremo encajado sobre el difusor 14.This transfer element 21 may be constituted by a tubular sheath that is disposed within the intake chamber 3 along the longitudinal axis A and extends into the tubular element 19, with one end connected to the bottom 2a of the support body 2 and the other end fitted on the diffuser 14.
En la primera lumbrera 4 la pared lateral del elemento de transferencia 21 tiene una pluralidad de rendijas 22 que se distribuyen anularmente para permitir el paso del flujo del fluido oxidante desde el primer orificio 4 hacia el difusor 14 al pasar, sucesivamente, a traves de la camara de admision 3, las rendijas 22, adentro del elemento de transferencia 21.In the first port 4 the side wall of the transfer element 21 has a plurality of slits 22 which are distributed annularly to allow the passage of the flow of the oxidizing fluid from the first hole 4 towards the diffuser 14 as it passes successively through the intake chamber 3, slits 22, inside transfer element 21.
En una realizacion alternativa, que no se muestra, el elemento de transferencia 21 se puede fijar al cuerpo de soporte 2 en el reborde 6, dejando la camara de admision 3 libre, y tener una pluralidad de rendijas 22 que se distribuyen anularmente para permitir el paso del flujo del fluido oxidante desde la camara de admision 3 a la holgura formada entre la pared exterior del elemento de transferencia y la pared interior del elemento tubular 19. De esta manera es posible obtener la descarga del exceso de fluido oxidante, segun las perdidas de altura manometrica que se hayan producido en el paso a traves de las aberturas 15, evitando as! fenomenos de desprendimiento de llama que se producirlan si el flujo del fluido oxidante llegara a la zona de combustion 9 con una velocidad excesiva, y el elemento tubular 19 se refrigera.In an alternative embodiment, which is not shown, the transfer element 21 can be fixed to the support body 2 on the flange 6, leaving the intake chamber 3 free, and having a plurality of slits 22 which are distributed annularly to allow passage of the flow of the oxidizing fluid from the intake chamber 3 to the clearance formed between the outer wall of the transfer element and the inner wall of the tubular element 19. In this way it is possible to obtain the discharge of the excess of oxidizing fluid, according to the losses of manometric height that have occurred in the passage through the openings 15, thus avoiding! Flame release phenomena that will occur if the flow of the oxidizing fluid reaches the combustion zone 9 with excessive velocity, and the tubular element 19 is cooled.
En la practica, se ha encontrado que el quemador segun la invencion, como se describe, logra la meta y objetos pretendidos y, en particular, se llama la atencion al hecho de que el quemador segun la invencion asegura estabilidad de llama en cualquier condicion de funcionamiento y permite una mezcla optima de aire y gas combustible y, por lo tanto, un proceso de combustion que es eficiente.In practice, it has been found that the burner according to the invention, as described, achieves the intended goal and objects and, in particular, attention is drawn to the fact that the burner according to the invention ensures flame stability in any condition of operation and allows an optimal mixture of air and combustible gas and, therefore, a combustion process that is efficient.
Ademas, el quemador esta particularmente adaptado para ser usado en sistemas para ceramicas que ejecutan procesos de secado o coccion y que suministran aire recuperado de flujo fijo.In addition, the burner is particularly adapted to be used in systems for ceramics that carry out drying or cooking processes and that supply air recovered from fixed flow.
La invencion concebida as! es susceptible de numerosas modificaciones y variaciones, todas ellas dentro del alcance de las reivindicaciones anexas.The invention conceived as! It is susceptible to numerous modifications and variations, all within the scope of the appended claims.
Ademas, todos los detalles se pueden sustituir por otros elementos tecnicamente equivalentes.In addition, all the details can be replaced by other technically equivalent elements.
En la practica los materiales empleados, as! como las dimensiones y formas contingentes, pueden ser cualquiera segun requisitos, pero sin por esta razon dejar el alcance de proteccion de las reivindicaciones adjuntas.In practice the materials used, as! as the contingent dimensions and shapes, they can be any according to requirements, but without this reason leave the scope of protection of the appended claims.
Cuando las caracterlsticas tecnicas mencionadas en cualquier reivindicacion sean seguidas por signos de referencia, esos signos de referencia se han incluido con el unico proposito de aumentar la inteligibilidad de las reivindicaciones y, en consecuencia, dichos signos de referencia no tienen ningun efecto limitativo en la interpretacion de cada elemento identificado a modo de ejemplo por dichos signos de referencia.When the technical characteristics mentioned in any claim are followed by reference signs, those reference signs have been included with the sole purpose of increasing the intelligibility of the claims and, consequently, said reference signs have no limiting effect on the interpretation of each element identified by way of example by said reference signs.
Claims (10)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ITMO2010A000087A IT1399383B1 (en) | 2010-03-29 | 2010-03-29 | BURNER WITH HIGH FLAME STABILITY, PARTICULARLY FOR THE THERMAL TREATMENT OF CERAMIC MANUFACTURES. |
| ITMO20100087 | 2010-03-29 | ||
| PCT/EP2010/064931 WO2011120597A1 (en) | 2010-03-29 | 2010-10-06 | Burner with high flame stability, particularly for the thermal treatment of ceramic articles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES2576870T3 true ES2576870T3 (en) | 2016-07-11 |
Family
ID=43040634
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES10761020.6T Active ES2576870T3 (en) | 2010-03-29 | 2010-10-06 | A burner with high flame stability, particularly for the heat treatment of ceramic articles |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP2553338B1 (en) |
| BR (1) | BR112012024866B1 (en) |
| ES (1) | ES2576870T3 (en) |
| IT (1) | IT1399383B1 (en) |
| WO (1) | WO2011120597A1 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITBO20120436A1 (en) * | 2012-08-07 | 2014-02-08 | Sacmi Forni Spa | COMBUSTION EQUIPMENT WITH HEAT RECOVERY IN PARTICULAR FOR CERAMIC OVENS |
| ITMO20120292A1 (en) * | 2012-11-27 | 2014-05-28 | Alberto Benfenati | BURNER |
| WO2015104584A1 (en) * | 2014-01-09 | 2015-07-16 | Alberto Benfenati | Burner with adjustable dispensing means |
| BR112016018286A2 (en) * | 2014-02-11 | 2017-08-08 | Ancora Spa | BURNER |
| ITUB20159531A1 (en) * | 2015-12-21 | 2017-06-21 | Satengineering Sas Di Francesco Dursi & C | BOILER FOR FLUID HEATING |
| ITUB20159610A1 (en) * | 2015-12-21 | 2017-06-21 | Satengineering Sas Di Francesco Dursi & C | COOKING OVEN |
| KR101988821B1 (en) * | 2019-01-16 | 2019-06-12 | 윤정노 | Apparatus for crystallizing powdered bones |
| IT202100027203A1 (en) * | 2021-10-22 | 2023-04-22 | Coven Soc A Responsabilita Limitata | NON-PREMIXED GAS COOKING OVEN |
| IT202200017145A1 (en) * | 2022-08-10 | 2024-02-10 | Siti B & T Group Spa | BURNER FOR INDUSTRIAL OVENS |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29518919U1 (en) * | 1995-11-29 | 1996-01-25 | MEKU Metallverarbeitungs-GmbH, 78083 Dauchingen | Mixing device for a burner |
| DE19925276A1 (en) * | 1999-06-02 | 2000-12-07 | Ruhrgas Ag | Gas burner for heating air stream has burner head in burner tube with plate arranged at burner head, combustion air channel upstream of plate and exhaust gas opening at other end of tube |
| US7163392B2 (en) * | 2003-09-05 | 2007-01-16 | Feese James J | Three stage low NOx burner and method |
| DE202009002700U1 (en) * | 2009-03-05 | 2009-04-30 | Meku Metallverarbeitungs Gmbh & Co. Kg | Mixing device for a burner |
-
2010
- 2010-03-29 IT ITMO2010A000087A patent/IT1399383B1/en active
- 2010-10-06 BR BR112012024866-9A patent/BR112012024866B1/en active IP Right Grant
- 2010-10-06 WO PCT/EP2010/064931 patent/WO2011120597A1/en active Application Filing
- 2010-10-06 EP EP10761020.6A patent/EP2553338B1/en active Active
- 2010-10-06 ES ES10761020.6T patent/ES2576870T3/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| BR112012024866A2 (en) | 2016-06-14 |
| WO2011120597A1 (en) | 2011-10-06 |
| EP2553338A1 (en) | 2013-02-06 |
| EP2553338B1 (en) | 2016-03-16 |
| BR112012024866B1 (en) | 2020-10-27 |
| ITMO20100087A1 (en) | 2011-09-30 |
| IT1399383B1 (en) | 2013-04-16 |
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