EP3719397B1 - Brenner für die verbrennung von gasförmigen brennstoffen in einem schachtofen, insbesondere für wärmebehandlung von mineralien in granulierter form - Google Patents

Brenner für die verbrennung von gasförmigen brennstoffen in einem schachtofen, insbesondere für wärmebehandlung von mineralien in granulierter form Download PDF

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Publication number
EP3719397B1
EP3719397B1 EP20167863.8A EP20167863A EP3719397B1 EP 3719397 B1 EP3719397 B1 EP 3719397B1 EP 20167863 A EP20167863 A EP 20167863A EP 3719397 B1 EP3719397 B1 EP 3719397B1
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EP
European Patent Office
Prior art keywords
burner
separation insert
combustion
shaft furnace
gaseous fuel
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Application number
EP20167863.8A
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English (en)
French (fr)
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EP3719397C0 (de
EP3719397A1 (de
Inventor
Marian Hlivák
Marek Mocný
Radoslav Keken
Lubomír Kolesár
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Slovenske Magnezitove Zavody Akciova Spolocnost Jelsava V Skratke Smz AS Jelsava
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Slovenske Magnezitove Zavody Akciova Spolocnost Jelsava V Skratke Smz AS Jelsava
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Publication of EP3719397A1 publication Critical patent/EP3719397A1/de
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Publication of EP3719397C0 publication Critical patent/EP3719397C0/de
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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
    • F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F27B1/08—Shaft or like vertical or substantially vertical furnaces heated otherwise than by solid fuel mixed with charge
    • 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
    • F23D14/62—Mixing devices; Mixing tubes
    • F23D14/64—Mixing devices; Mixing tubes with injectors
    • 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
    • F23D14/70—Baffles or like flow-disturbing devices
    • 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
    • F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
    • F23D14/78—Cooling burner parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D99/00—Subject matter not provided for in other groups of this subclass
    • F23D99/002—Burners specially adapted for specific applications
    • F23D99/004—Burners specially adapted for specific applications for use in particular heating operations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • F23N5/022—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
    • F23M2900/00—Special features of, or arrangements for combustion chambers
    • F23M2900/05021—Wall blocks adapted for burner openings

Definitions

  • the invention concerns a burner for combustion (burning) of the gaseous fuel, for example of natural gas, in a shaft furnace, where the charge is heat processed by direct influence of the flame.
  • the charge mainly in form of the pulverized mineral, is heated more evenly thanks to combustion in the new burner, whereby it produces fewer dangerous pollutants.
  • Shaft furnaces which are heated by gaseous fuel use either single central burner or a set of burners which are distributed on the circumference of the furnace.
  • the burner is usually attached on the outer coating of the furnace and the opening for the burner is usually equipped by the furnace lining (inwall, fettling) which creates a chamber.
  • the outlet of the burner with a jet is inside the chamber, at the edge zone, but already before the crossing through the chamber to the space of the shaft furnace so that the burner is not damaged by the movement of the material in the furnace.
  • An air for combustion is led into the chamber and the flame of the burner burns the edges of the chamber at the entry into the space of the furnace, which damages the furnace lining.
  • Publication EP0302417B1 discloses a method which should prevent the damaging of the chamber lining by means of a central burner with a double construction, which - however - necessitates preparation of two gas mixtures, where first mixture has high heat power and second mixture has low heat power. Such solution is complicated for the purposes of gathering the fuel and it cannot be used in existing chambers with small diameter.
  • a burner for combustion of gaseous fuel in a shaft furnace mainly for heat processing of minerals in granular form
  • the burner is placed in a burner chamber in a wall of the shaft furnace and it has a supply pipe (feed pipe) connected to the source of the gaseous fuel; the supply pipe is ended by the burner's jet which is placed outside the edge zone, where the chamber is connected onto the inside of the shaft furnace by the edge zone, whereby forced air supply for the combustion is led into the burner chamber, according to this invention, which essence lies in the fact that it includes an oblong separation insert; at least one opening of the combust air which connects the supply of the air with the inner space of the separation insert is created between the supply pipe and the separation insert, whereby the second end of the separation insert reaches to the edge zone and the outer dimension of the separation insert is smaller than the inner dimension of the chamber.
  • first and second in this text differentiate between two opposite sides of the body; they do not denote the difference in importance and they are mutually interchangeable.
  • first is assigned to the side which is first from the direction of flow of combust air and also from the direction of gaseous fuel.
  • separation insert denotes any body, pipe, cylinder, casing, shell, which has continuous outer sheathing capable of separating the branches of air flow or flue gases, respectively, in the burner chamber.
  • insert itself should be understood broadly and there is a possibility of subsequent insertion of this insert into existing burner constructions.
  • the shape of transversal cross-section of the separation insert corresponds to the cross-sectional shape of the burner chamber; usually it has a shape of the circle with irregularities which correspond to the particular type of furnace lining.
  • the separation insert will in most cases have a shape of cylindrical casing, usually it will be produced from steel, preferably from the from heat-resistant steel.
  • the outer diameter of the cylindrical separation insert is less than inner diameter of the burner chamber, preferably the outer diameter of the cylindrical separation insert is smaller by at least 20 mm than the inner diameter of the burner chamber, so that the cross-sectional profile is sufficient for the flow of the air between the outer surface of the separation insert and the inner surface of the burner chamber.
  • the significant feature of the proposed invention is the creation of the separated profiles of flow within the burner chamber during forced intake of the air into the burner chamber.
  • a pipe usually serves for air intake, which is connected through a pipe bend or T-shaped pipe piece to the outer side of the burner chamber.
  • a burner is inserted into the burner chamber by means of a flange on the pipe bend or T-shaped pipe piece, whereby it is carried by supply pipe as a carrier fixed in the flange.
  • the air blown into the burner chamber is distributed in such a way that part of the air runs at least through one opening between the supply pipe and separation insert and runs into the inner space of the separation chamber where there is burner's nozzle. It is preferable if the separation insert, supply pipe and burner's nozzle are within a single axis or if their axis differ within no more than constructional and installation margins of error, respectively.
  • the air brought inside the separation insert is primarily mixed with the gaseous fuel emerging from the burner's nozzle; the mixture of air and gaseous fuel is subsequently burned in such a way that combustion takes place inside the separation barrier and then proceeds inside the shaft furnace where the flame directly traverses and it operates directly within the granular charge.
  • the burning out of the gaseous fuel is supported by the air which runs around the separation insert and until this phase it only served the function of cooling of the surface of the burner chamber.
  • This air branch also cooled the outer surface of the separation insert in order to avoid its overheating and mechanical collapse.
  • the air which flows and cools the outer surface of the separation chamber is at the same time pre-heated before the entry into the combustion space within the furnace.
  • the burner's nozzle is placed outside the edge zone by which the chamber is connected to the inside of the shaft furnace; usually it will be present more than 100 mm, preferably more than 300 mm, from the edge of the chamber.
  • the length of the separation insert will correspond to this; said length reaching from before the burner's nozzle to the edge zone of the chamber, preferably to the edge of the chamber itself.
  • the flowing gaseous fuel and flowing combustion air are firstly mixed, then combusted, whereby within the length of the chamber there is no direct operation of the flame onto the lining of the chamber. This is significantly manifested by the increase in the durability of the chamber's lining.
  • the forced blowing of the air into the burner chamber according to this invention leads to flow around the outer side of the separation insert. Thanks to this the surface of the burner chamber is effectively cooled even in the edge zone, where hitherto critical heat load arose.
  • the air flowing around the outer side of the separation insert enters on its other side into the contact with the burning flame, where it can support the second degree of the burning of the gaseous fuel.
  • the secondary combustion air before the burning inside the shaft furnace is subsequently used for cooling.
  • An important advantage of the proposed invention is the usability of the burner in existing shaft furnaces without the need for their modification and without the need to modify the air distribution.
  • the existing air distribution is construed without the separation of the combustion air and air for cooling of the surface of the burner chamber.
  • the separation of the combustion air and the air for the cooling of the surface of the burner chamber takes place only thanks to the new construction of the burner.
  • a cross-sectional geometry of the first end of the separation insert is preferably used.
  • the opening for the combustion air is formed by the space between the outer surface of the supply pipe and inner opening of the first end of the separation insert and has a variable geometry.
  • the first end of the separation insert has conical shape which then follows into the cylindrical body continuing towards the other end of the separation insert.
  • the conical shape diminishes the throttling of the flowing air and directs the air flow towards the surface of the burner chamber.
  • connecting elements for example at least three screws, through which the separation insert is connected to the supply fuel pipe.
  • the annular (intercircular) space delimited by the outer surface of the supply pipe and the outer opening of the first end of the separation insert forms an opening for the combustion air into which the screw shafts protrude.
  • the improved effect and higher durability of the separation insert is achieved by an arrangement where the separation insert has ribs alongside its outer surface.
  • the ribs are, in the preferable arrangement, distributed in regular intervals and they are parallel with the longitudinal axis of the separation insert.
  • a rib's length is at least 20%, preferably 40%, of the length of the separation insert.
  • the ribs not only direct the air flow, but they increase the mechanical and heat resistance of the separation insert, too, preventing excessive deformation of the insert, since such deformations arise as a result of thermal expansion.
  • the uneven thermal field during the burning, combined with the turbulent gas flow, can lead to rotation and deviation of the body of the separation insert; the ribbing helps to increase the solidity of the separation insert.
  • the ribs ensure that there remains a gap between the separation insert and the surface of the chamber.
  • the ribs increase the effective heat-transferring surface, too, and help to center the burner in the chamber during the mounting.
  • the outer diameter of the separation insert together with the ribs is smaller, or at most the same, as the inner diameter of the burner chamber.
  • the possibilities of setting of the burning capabilities of the burner lie mainly within the design of the dimensions of individual parts of the chamber.
  • a gas and air flow being given, the choice of the inner diameter of the cone relative to the diameter of the burner chamber and to the diameter of the supply gas pipe, has significant influence.
  • the design of the dimensions of the cross-section of the annulus between the sheath of the separation insert and the inner surface of the burner chamber is likewise important.
  • the size of the annulus is related to the choice of the ribs' height, too.
  • the placement of the nozzle within the length of the burner chamber also influences the features and shape of the combustion zone.
  • This length (compared to 50 mm in the prior art) causes a significant homogenization of the combustion even before the contact of the flue gases with the charge. Subsequently, the burning out of the gas in the charge allows for the secondary, cooling air which flows between the separation insert and the inner surface of the combustion chamber.
  • a suitable choice of geometry of individual parts of the separation insert leads to simple construction with high reliability and durability.
  • some elements of the separation insert have changeable geometry for example, the opening of the combustion air can be equipped by a shade (screen, diaphragm) with changeable throttling.
  • this can have independent supplies of the air inside the separation insert and air into the gap between the separation insert and the inner surface of the burner chamber.
  • the amount of the primary combustion air and amount of the cooling combustion air flowing around the separation insert from the outside can be independently regulated.
  • the burner can be equipped by temperature sensor, for example, by infrared temperature sensor, whose head is placed in the cold zone, for example, on the outer flange of the burner chamber. The measurement of the temperature in the edge zone allows to evaluate the process of burning and subsequently the temperature fields can be regulated by changing the amount of the secondary air.
  • Constructionally simple and operationally reliable separation insert limits the inflow of the combustion air to the space with the nozzle, it creates a self-regulating volume of the combustion zone in the inner space of the separation insert and it also directs the flow of the air which cools the surface of the chamber.
  • the advantage of the solution is its simple use in the existing shaft furnaces without the need for costly and difficult modifications of the construction of the existing shaft furnace and air distributions.
  • a burner is used in the shaft furnace for the thermal processing of the magnesite ore milled into the granular form.
  • the shaft furnace has multiple burner chamber 1 alongside its circumference, with burners inserted inside the shaft furnace's walls.
  • the original construction includes the forced supply air distribution through the pipe alongside the circumference of shaft furnace's sheath.
  • the pipe is placed below the burner chamber 1 level.
  • a branch line from the air pipe towards the burner chamber 1 is formed below the chamber 1 ; the branch line ends with T-shaped piece.
  • One branch of the T-shaped piece leads into the burner chamber 1 , the other branch of the T-shaped piece forms a flange end designed for the screwing of the flange 10 of the burner.
  • This arrangement forms an original construction which is used without modifications for the cooperation with the new burner according to this invention. This brings about the advantage of minimal modifications during the mounting of the burner according to this invention.
  • the burner involves a supply pipe 2 mounted into the flange 10 designed for the screwing of the flange end to the T-shaped piece.
  • the supply pipe 2 is gas-tightly connected with the flange 10 and this joint carries the weight of the burner inserted into the carrier.
  • the supply pipe 2 is ended by the nozzle 3 which in this example is formed by the ending with six openings. The openings in the nozzle 3 are led evenly and radially into the space in an angle which is 45° from the horizontal axis.
  • the position of the nozzle 3 inside the burner chamber 1 is determined by the length of the supply pipe 2 from the flange's 10 plane; the position of the nozzle 3 in this example is set in such a way that the nozzle 3 is present at least 150 mm from the edge of the burner chamber 1_.
  • the burner has a separation insert 1, whose body is welded from several parts of heat-resistant steel, preferably STN 17255 steel.
  • the weldment has oblong shape.
  • the first end 8 involves a cone 7 with short collar which has three openings with the threads for the screws.
  • the inner dimension of the first end 8 - that is, the inner diameter of the collar and the conical part - is more than the inner diameter of the supply pipe 2 and the gap between them forms the opening 5 for the combustion air.
  • the connecting elements - in this case, three screws - the separation insert 4 is connected, and it is centered against the supply pipe 2.
  • the cylindrical body of the separation insert 1 follows upon the cone 7.
  • the cylindrical part continues to the edge zone of the chamber 1 , where it forms the second end 9.
  • Ribs 6 from the strap are welded evenly on the outer cylindrical surface of the separation insert 4.
  • the separation insert 1 has 10 ribs 6 reached all the way to the second end 9.
  • the burner chamber 1 has diameter of ca. 98 mm.
  • the furnace lining in the edge zone of the chamber 1 was thermally destroyed already with the nozzle's 3 position being 50 mm from the edge of the chamber 1 .
  • Use of the new burner according to this invention increases the nozzle's 3 distance from the edge of the burner chamber 1 , prolongs the course of the mixing of the natural gas with the combustion air, significantly decreases the CO emissions and, at the same time, thermally processes the charge more regularly and evenly.
  • the supply pipe 2 is slidably placed in the socket which is welded to the flange 10.
  • the placement is sealed by the couple of sealing rings (O-rings).
  • This connection transfers the weight of the inserted burner into the flange 10 and, at the same time, allows to alter the position of the nozzle 3 in the chamber, that is, it allows to change the distance of the nozzle 3 from the edge of the chamber 1 .
  • a sheet metal screen (shade, diaphragm) is placed in the opening 5 for the combustion air; this screen allows to change the effective cross-section of the inflow of the combustion air inside the separation insert 4.
  • the separation insert 4 is composed from three parts which are subsequently welded into a single body.
  • the three parts in this example are defined as sheath 11, cylindrical pipe 12 and cone 7.
  • the middle part consists of cylindrical pipe 12, in the center of which the cylindrical hub 13 is placed.
  • the axis of the cylindrical hub 13 is basically identical with the axis of the cylindrical pipe 12; the axes can angularly and dimensionally differ within a common margin of error from the production.
  • the hub 13 is welded to the three centering wings 14, which are in this example trapezoidally shaped.
  • the winds 14 are welded to the outer circumference of the hub 13 in angularly identical pitch and on the other ends they are welded to the inner surface of the cylindrical pipe 12.
  • another number of the wings 14 can be used, or entirely different carrier element can be used, which would ensure the centric placement of the nozzle within the cylindrical pipe 12.
  • the cylindrical pipe 12 in this example is short; it corresponds approximately to the length of the hub 13 so that the joints can be welded by common welding equipment which otherwise could not have been inserted into the long cavity with small diameter.
  • the cylindrical sheath 11 of the burner with the ribs 6 is welded to one front of the cylindrical pipe 12.
  • the ribs 6 are welded on the sheath 11.
  • the ribs 6 have 4 x 6 mm cross-section and they reach from the end of the separation insert 1 to approximately a middle of the length of the separation insert 4.
  • the number of ribs 6 in this example is 10 and they are evenly angularly distributed alongside the circumference.
  • the cone 7 On the other side the cone 7 is welded to the cylindrical pipe 12 with the centered hub 13.
  • the cone 7 has outer diameter identical with the diameter of the cylindrical pipe 12 with which it is circumferentially welded, and towards the opposite end the cone 7 is narrowed to a diameter which is more than the outer diameter of the gas supply pipe 2, which produces a cross-section of an annulus through which the air is blown towards the nozzle 3. This annulus forms an opening 5 for the combustion air.
  • the outer diameter of the sheath 11 including the ribs 6 in this example is approximately 1 mm less than the inner diameter of the burner chamber 1 which allows for easy insertion of the burner into the burner chamber 1 and eventual permanent deformations caused by heat do not case problems during the burner's dismantling.
  • the ribs 6 ensure the creation of a gap between the burner and the inner surface of the burner chamber 1 , which protects the lining in the thermally critical place.
  • the air blow into the burner chamber flows to the nozzle 3 not only through annulus, but it is also directed by the cone 7 into the space between the sheath 11 and the inner surface of the burner chamber 1 which cools the furnace lining of the wall by the burner chamber 1 . This air does not enter into the process of burning in the burner chamber 1 , but only inside the charge, which both increases and evens out the combustion zone.
  • the weldment is attached for the gas supply pipe 2 in such a way the end of the supply pipe 2 with the thread is inserted to the centered cylindrical hub 13 from the side of the cone 7 and the nozzle 3 is screwed from the opposite side.
  • the mounting on the nozzle's 3 body leans onto the front of the cylindrical hub 13. This arrangement achieves fixation of the burner onto the burner to the gas supply pipe 2.
  • the supply pipe 2 is led in the opening of the flange 10 which closes the burner chamber 1 from outside.
  • the nozzle 3 in this example has eight openings through which the natural gas flows out under the pressure of the air.
  • the nozzle 3 is placed approximately 30 mm from the outer edge of the shaft furnace.
  • the original air distribution is attached in such a way that the two branches of forced air supply with independent regulation valves are produced.
  • the first branch leads the air inside the separation insert 4, the second branch is connected into the gap between the separation insert 1 and the inner surface of the burner chamber 1 .
  • the head of the infrared thermometer is placed on the flange 10.
  • the volume of the cooling secondary air can be altered while the stoichiometric ratio of the air during burning inside the separation insert 1 is maintained.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Furnace Details (AREA)

Claims (13)

  1. Brenner für die Verbrennung von gasförmigen Brennstoffen in einem Schachtofen, insbesondere für Wärmebehandlung von Mineralien in körniger Form, wobei der Brenner zur Anordnung in einer Brennerkammer (1) im Mantel des Schachtofens bestimmt ist und über ein an eine Quelle für den gasförmigen Brennstoff angeschlossenes Zuführungsrohr (2) verfügt, wobei das Zuführungsrohr (2) mit einer Düse (3) abgeschlossen ist, die außerhalb der Randzone des Brenners angeordnet ist, über die die Brennerkammer (1) mit dem Innenraum des Schachtofens verbunden ist, wobei während des Einsatzes gezwungene Luftzufuhr für die Verbrennung in die Brennerkammer (1) erfolgt und wobei der Brenner einen Trenneinsatz (4) umfasst, der an das Zuführungsrohr (2) eingesetzt ist, der Trenneinsatz (4) ein erstes Ende (8) und ein zweites Ende (9) aufweist, wobei das erste Ende (8) sich auf der Seite der gasförmigen Brennstoffquelle befindet, wobei der Trenneinsatz (4) mit seinem ersten Ende (8) mit dem Zuführungsrohr (2) verbunden ist, so dass sich die Düse (3) innerhalb des Trenneinsatzes (4) befindet; das zweite Ende (9) des Trenneinsatzes (4) in die Brennerrandzone hineinragt; der Spalt für die Luftströmung in der Richtung zum Schachtofen sich zwischen dem Trenneinsatz (4) und der Innenfläche des Schachtofens befindet, wobei die Luftzufuhr ins Innere des Trenneinsatzes (4) und zur Außenfläche des Trenneinsatzes (4) geführt wird, wobei zwischen dem Zuführungsrohr (2) und dem Trenneinsatz (4) mindestens eine Öffnung (5) der Verbrennungsluft ausgebildet ist, wobei diese Öffnung (5) den Zwangslufteinlass mit dem Innenraum des Trenneinsatzes (4) verbindet, dadurch gekennzeichnet, dass die Öffnung (5) der Verbrennungsluft eine variable Geometrie aufweist.
  2. Brenner für die Verbrennung von gasförmigen Brennstoffen in einem Schachtofen, insbesondere für Wärmebehandlung von Mineralien in körniger Form, nach Anspruch 1, dadurch gekennzeichnet, dass dieser über getrennte Zuführungen der Luft ins Innere des Trenneinsatzes (4) und der Luft in den Spalt zwischen dem Trenneinsatz (4) und der Innenfläche der Brennerkammer (1) verfügt.
  3. Brenner für die Verbrennung von gasförmigen Brennstoffen in einem Schachtofen, insbesondere für Wärmebehandlung von Mineralien in körniger Form, nach einem der Ansprüche 1 bis 2, dadurch gekennzeichnet, dass die Querschnittsform des Trenneinsatzes (4) der Querschnittsform der Brennerkammer (1) entspricht, vorteilhaft hat der Trenneinsatz (4) eine kreisförmige Querschnittsform.
  4. Brenner für die Verbrennung von gasförmigen Brennstoffen in einem Schachtofen, insbesondere für Wärmebehandlung von Mineralien in körniger Form, nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Spalt zwischen dem Trenneinsatz (4) und der Innenfläche der Brennerkammer (1) mindestens 10 mm, vorteilhaft mindestens 20 mm aufweist.
  5. Brenner für die Verbrennung von gasförmigen Brennstoffen in einem Schachtofen, insbesondere für Wärmebehandlung von Mineralien in körniger Form, nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Düse (3) von dem Innenrand der Brennerkammer (1) in einem Abstand mindestens von 100 mm, vorteilhaft mindestens von 250 mm liegt.
  6. Brenner für die Verbrennung von gasförmigen Brennstoffen in einem Schachtofen, insbesondere für Wärmebehandlung von Mineralien in körniger Form, nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass der Trenneinsatz (4) an dem ersten Ende (8) einen Konus (7) aufweist, an den sich ein zylindrisches Rohr (12) und ein Mantel (11) anschließt, wobei der Mantel (11) bis zu dem zweiten Ende (9) reicht.
  7. Brenner für die Verbrennung von gasförmigen Brennstoffen in einem Schachtofen, insbesondere für Wärmebehandlung von Mineralien in körniger Form, nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass der Trenneinsatz (4) eine Nabe (13) zum Einsetzen auf das Zuführungsrohr (2) aufweist, wobei die Nabe (13) mittels mindestens eines Flügels (14) im Inneren des zylindrischen Rohres (12) befestigt ist.
  8. Brenner für die Verbrennung von gasförmigen Brennstoffen in einem Schachtofen, insbesondere für Wärmebehandlung von Mineralien in körniger Form, nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass der Trenneinsatz (4) auf der äußeren Oberfläche mindestens drei Rippen (6) aufweist, die in der Richtung der Längsachse angeordnet sind.
  9. Brenner für die Verbrennung von gasförmigen Brennstoffen in einem Schachtofen, insbesondere für Wärmebehandlung von Mineralien in körniger Form, nach Anspruch 8, dadurch gekennzeichnet, dass die Rippen (6) von dem zweiten Ende (9) mindestens bis zu 20 % der Länge des Trenneinsatzes (4), vorteilhaft bis zu 40% Länge des Trenneinsatzes (4) reichen.
  10. Brenner für die Verbrennung von gasförmigen Brennstoffen in einem Schachtofen, insbesondere für Wärmebehandlung von Mineralien in körniger Form, nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass der Trenneinsatz (4) als ein Schweißteil, vorteilhaft als ein Schweißteil aus feuerfestem Stahl ausgebildet ist.
  11. Brenner für die Verbrennung von gasförmigen Brennstoffen in einem Schachtofen, insbesondere für Wärmebehandlung von Mineralien in körniger Form, nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass der Durchflussquerschnitt der Öffnung (5) der Verbrennungsluft an dem ersten Ende (8) bis zu 40 % von Querschnitt der Brennerkammer (1) erreicht.
  12. Brenner für die Verbrennung von gasförmigen Brennstoffen in einem Schachtofen, insbesondere für Wärmebehandlung von Mineralien in körniger Form, nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, dass das Zuführungsrohr (2) mit einem Flansch (10) verbunden ist, der in die Luftleitung in der Achse der Brennerkammer (1) angeschlossen ist, vorteilhaft ist die Flanschverbindung (10) mit dem Zuführungsrohr (2) als Schubverbindung ausgebildet und gegenseitig mindestens mit einem Dichtungsring abgedichtet.
  13. Brenner für die Verbrennung von gasförmigen Brennstoffen in einem Schachtofen, insbesondere für Wärmebehandlung von Mineralien in körniger Form, nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, dass dieser einen Temperaturfühler in der Randzone, vorteilhaft einen optischen Temperaturfühler umfasst.
EP20167863.8A 2019-04-03 2020-04-02 Brenner für die verbrennung von gasförmigen brennstoffen in einem schachtofen, insbesondere für wärmebehandlung von mineralien in granulierter form Active EP3719397B1 (de)

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SK50027-2019U SK8731Y1 (sk) 2019-04-03 2019-04-03 Horák na spaľovanie plynného paliva v šachtovej peci, najmä na tepelné spracovanie minerálov v zrnitej forme

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CN114812191A (zh) * 2022-03-09 2022-07-29 五冶集团上海有限公司 一种焙烧炉烧嘴通道耐火捣打料施工方法

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EP3719397C0 (de) 2023-09-20
SK8731Y1 (sk) 2020-04-02
RU2766115C2 (ru) 2022-02-08
SK500272019U1 (sk) 2019-11-05
EP3719397A1 (de) 2020-10-07
RU2020112894A3 (de) 2021-10-21

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