EP3489602A1 - Batch furnaces for annealing material and method for heat treatment of a furnace product - Google Patents
Batch furnaces for annealing material and method for heat treatment of a furnace product Download PDFInfo
- Publication number
- EP3489602A1 EP3489602A1 EP18208226.3A EP18208226A EP3489602A1 EP 3489602 A1 EP3489602 A1 EP 3489602A1 EP 18208226 A EP18208226 A EP 18208226A EP 3489602 A1 EP3489602 A1 EP 3489602A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fan
- heat transfer
- nozzle
- furnace
- batch furnace
- 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.)
- Granted
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 96
- 239000000463 material Substances 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 9
- 238000000137 annealing Methods 0.000 title claims abstract description 6
- 239000007789 gas Substances 0.000 description 13
- 238000009413 insulation Methods 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 239000011261 inert gas Substances 0.000 description 3
- 230000004308 accommodation Effects 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000002277 temperature effect Effects 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D7/00—Forming, maintaining or circulating atmospheres in heating chambers
- F27D7/04—Circulating atmospheres by mechanical means
-
- 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
- F27B17/00—Furnaces of a kind not covered by any of groups F27B1/00 - F27B15/00
- F27B17/0016—Chamber type furnaces
- F27B17/0083—Chamber type furnaces with means for circulating the atmosphere
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
- C21D1/767—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material with forced gas circulation; Reheating thereof
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0043—Muffle furnaces; Retort furnaces
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
-
- 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
- F27B11/00—Bell-type furnaces
-
- 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
- F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
- F27B5/06—Details, accessories or equipment specially adapted for furnaces of these types
- F27B5/14—Arrangements of heating devices
-
- 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
- F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
- F27B5/06—Details, accessories or equipment specially adapted for furnaces of these types
- F27B5/16—Arrangements of air or gas supply devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/0024—Charging; Discharging; Manipulation of charge of metallic workpieces
-
- 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
- F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
- F27B5/06—Details, accessories or equipment specially adapted for furnaces of these types
- F27B5/16—Arrangements of air or gas supply devices
- F27B2005/166—Means to circulate the atmosphere
- F27B2005/167—Means to circulate the atmosphere the atmosphere being recirculated through the treatment chamber by a turbine
- F27B2005/168—Means to circulate the atmosphere the atmosphere being recirculated through the treatment chamber by a turbine by more than one turbine
-
- 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
- F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
- F27B5/06—Details, accessories or equipment specially adapted for furnaces of these types
- F27B5/16—Arrangements of air or gas supply devices
- F27B2005/166—Means to circulate the atmosphere
- F27B2005/169—Means to circulate the atmosphere the atmosphere being continuously renewed by exterior means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D7/00—Forming, maintaining or circulating atmospheres in heating chambers
- F27D7/04—Circulating atmospheres by mechanical means
- F27D2007/045—Fans
Definitions
- the invention relates to a batch furnace for Glühgut and a method for heat treatment of a furnace material.
- a batch furnace according to the preamble of claim 1 is for example made DE 42 43 127 A1 known.
- Batch furnaces have a closed furnace space in which a single batch is heat treated.
- Examples of batch furnaces are single-coil ovens, which allow flexible and individual heat treatment of individual coils.
- Another example of a batch furnace are so-called chamber furnaces, which are used for the heat treatment of coils, billets and ingots.
- the from the aforementioned DE 42 43 127 A1 known batch furnace essentially has a fan, a heating unit, nozzle boxes for guiding the hot gas flow and hot gas nozzles.
- the hot gas nozzles are combined in nozzle plates for heating the coil.
- coil and hot gas flow are moved relative to each other. The relative movement of coil and the hot gas flow takes place through outside the Furnace arranged rotatable bearing blocks or by a pendulum vibration system in which the coil and / or the nozzle plates can be connected with.
- the known chamber furnaces and one-coil furnaces are elaborately constructed and relatively large, which leads to correspondingly large energy losses or requires correspondingly extensive thermal insulation measures.
- the invention is based on the object of specifying a batch furnace for annealing material, which enables a compact furnace size through an improved structure and reduces energy losses through an increased efficiency of the heat treatment.
- the invention is also based on the object of specifying a method for heat treatment of a furnace material.
- this object is achieved with regard to the batch furnace by the subject of claim 1.
- the above-mentioned object is achieved by the subject matter of claim 19.
- the invention is based on the idea to provide a batch furnace for Glühgut with a furnace housing having a closable feed opening, a receiving space for furnace material and means for convective heat transfer to the furnace material through a heat transfer medium.
- the device for convective heat transfer comprises at least one heating device and at least one fan, which is arranged in the furnace housing.
- the receiving space is arranged on the suction side of the fan and at least one nozzle field is arranged on the pressure side of the fan.
- the nozzle array has a central opening which forms an intake passage of the fan.
- the nozzle field projects radially over the fan.
- the invention has several advantages: Through the nozzle field on the pressure side of the fan, the heat transfer medium is directed to the furnace material or on a coil.
- the nozzle field projects radially over the fan, so that advantageously, a pressure channel is formed on the pressure side of the fan.
- the accelerated by the fan heat transfer medium is compressed.
- the heat transfer medium then flows at high speed through the nozzle array in the receiving space directly to the Ofengut or coil.
- Increasing the velocity of the heat transfer medium increases the efficiency of the convective heat transfer device on the kiln feed.
- the efficiency of the batch furnace during the heat treatment is significantly increased. This also allows a reduction in the energy required for the heat treatment.
- the nozzle array includes the intake passage located on the suction side of the fan. Furthermore, the nozzle field limits the pressure channel on a receiving space facing side of the pressure channel.
- the nozzle field in this case has nozzles through which the pressure side of the fan and thus the pressure channel with the receiving space are fluid-connected.
- the nozzle field is thus arranged on the suction side of the fan and arranged on the pressure side of the fan.
- Hot air, exhaust gas or inert gas are used as a heat transfer medium depending on the kiln good example.
- Hot air, exhaust gas or inert gas are used.
- the batch furnace according to the invention is particularly suitable for the heat treatment of Aluminiumglühgut, especially Aluminiumcoils.
- the heating device can be assigned to the fan.
- the heating device is arranged directly behind the pressure side of the fan.
- the heating device can also be arranged in front of the suction side of the fan. It is also possible that a heating device, in particular a first heating device, directly in front of the suction side of the fan and / or a heating device, in particular a second heating device, are arranged directly behind the pressure side of the fan.
- the heating device is arranged in the same way as the fan in the furnace housing.
- the cool heat transfer medium flows through the intake channel of the nozzle field into the fan and exits from the fan on the pressure side. Subsequently, the heat transfer medium is conducted to the heating device and absorbs heat. The heat transfer medium then flows through the nozzle array into the receiving space.
- the nozzle field is designed such that the heated heat transfer medium is passed to the furnace goods located in the receiving space.
- the fan arranged in the furnace housing means that, compared to the known nozzle systems, shorter flow paths and thus lower pressure losses in the furnace housing are realized.
- the fan and the nozzle array are arranged concentrically with each other. This has the advantage that a uniform volume distribution of the heat transfer medium on the pressure side of the fan is made possible. The heat transfer medium is thus uniformly passed through the nozzle array on the furnace material, whereby a homogeneous heat treatment takes place.
- the heating device is arranged concentrically with the fan in a pressure channel between the fan and the oven housing.
- the heating device for the heat transfer medium is arranged directly behind the pressure side of the fan in the furnace housing.
- the pressure channel is thus formed on the pressure side of the fan.
- the heat transfer medium is advantageously passed through the fan directly to the heating device. This reduces pressure losses and increases the heat absorption efficiency of the heat transfer medium.
- the nozzle field preferably ends in a fluid-tight manner on an inner wall of the furnace housing.
- the pressure channel thus forms a closed area on the pressure side of the fan, whereby a high compression of the heat transfer medium is made possible.
- the nozzle array is arranged directly in front of the suction side of the fan. This allows a compact design of the batch furnace, whereby the space required and the outer surface of the furnace to be insulated is reduced.
- the nozzle field has a funnel-shaped nozzle plate. Due to the funnel-shaped design of the nozzle plate, the accelerated heat transfer medium is directed focused from the pressure side of the fan on the Ofengut. The nozzle field is thus also arranged on the pressure side of the fan. Advantageously, a targeted heat treatment of the furnace good or coils is made possible.
- the nozzle plate is preferably annular.
- the nozzle plate comprises the central opening, which forms an intake passage of the fan.
- the nozzle plate has a plurality of tubular and / or slot-shaped nozzles which are circular about a center of the nozzle plate on an inner side in at least one nozzle region are arranged.
- the inside of the nozzle plate is facing the receiving space.
- the tubular and slot-shaped nozzles have the advantage that bundling and increasing the speed of the heat transfer medium takes place through each nozzle. Thus, a targeted heat treatment of the furnace material is possible and increases the efficiency of the convective heat transfer.
- the pressure side of the fan is fluidly connected to the receiving space through the tubular and / or slot-shaped nozzles.
- the intake duct of the nozzle field is arranged directly opposite the suction side of the fan. This has the advantage that a compact and rectilinear design of the intake passage is made possible. Thus, the pressure losses are reduced during the suction of the heat transfer medium.
- the suction passage is formed between the fan and the receiving space for the circulation of the heat transfer medium. Through the intake passage, the heat transfer medium is sucked by the fan. Due to the central design of the intake duct, a flow guidance of the heat transfer medium during the heat treatment of the furnace good in the furnace housing is advantageously improved.
- each fan is associated with at least one heating device and / or at least one inlet for an externally heated heat transfer medium.
- the heating means and the inlet for the externally heated heat transfer medium and the respective associated fan form a unit which forms the means for convective heat transfer.
- This embodiment has the advantage that the furnace material is heated uniformly from two sides.
- the embodiment is particularly suitable for heating coils, in particular aluminum coils, as well as for other kiln goods.
- each fan has at least one flow channel, which is arranged on the pressure side of the fan. The flow channel directs the heat transfer medium to at least one heating device.
- the fan may also have a plurality of flow channels, which are arranged radially circumferentially on the fan.
- the accelerated by the fan heat transfer medium is guided or directed by the flow channels targeted to the heating device.
- the efficiency of the heat absorption of the heat transfer medium is increased by the heating device.
- At least one fan is formed by a centrifugal fan. This makes it possible that the heat transfer medium is sucked out of the receiving space by the radial fan and discharged radially to the suction direction by the fan again.
- the radial fan can thus be arranged at a housing end of the furnace housing, since the heat transfer medium is sucked from the receiving space or from the front.
- this results in a compact design of the device for convective heat transfer and thus of the batch furnace.
- At least one fan has a drive which is arranged outside of the oven housing. This has the advantage that the fan drive is exposed to a relatively low heat load. For the drive thus no special thermal insulation or heat dissipation measures are required.
- the receiving space is formed substantially hollow cylindrical, wherein the fans are arranged on the end sides of the receiving space.
- the furnace housing has at least one inlet for an externally heated heat transfer medium.
- the position of the externally heated heat transfer medium inlet may be anywhere in the furnace.
- the inlet thereby allows access to the furnace interior or to the receiving space for the furnace material, so that the externally heated Heat transfer medium can get into the receiving space.
- used as externally heated heat transfer medium exhaust gases from another furnace system.
- the inlet for the externally heated heat transfer medium is located directly behind the pressure side of the fan. The invention is not limited to this arrangement.
- a heat transfer medium preferably hot air and / or hot inert gas and / or when using a jet pipe and hot exhaust gases are supplied to the batch furnace that externally, i. is heated outside the furnace. It is possible to combine one or more inlets for the externally heated heat transfer medium with one or more heating means, for example to bring a preheated heat transfer medium in the oven through the heating means to the desired final temperature.
- the heating device has a heating line for a gaseous heating medium.
- the heating cable can be formed by a steel tube, in particular by a segment tube.
- the heating cable can be arranged circumferentially in the pressure channel, the fan.
- the heating line is preferably arranged on the pressure side of the fan. Through the heating line, the externally heated heat transfer medium can be advantageously performed, whereby the heating cable is heated.
- the heated heating line also heats the circulating heat transfer medium in the oven housing.
- the furnace material is arranged in a receiving space of the batch furnace.
- a heat transfer medium is passed through a fan, in particular a radial fan, to a heating device.
- the heat transfer medium is heated by the heating device.
- the heated heat transfer medium is passed through a nozzle array on the furnace material for convective heat transfer.
- the method for heat treatment of a furnace material with a batch furnace according to the invention is in connection with the Batch oven explained advantages referenced.
- the method may alternatively or additionally comprise a single or a combination of several features mentioned above with respect to the batch furnace.
- a batch furnace with a housing part 10a of the furnace housing according to Fig. 1 is preferably used for the heat treatment of Aluminiumglühgut, such as aluminum coils.
- the batch furnace can generally be used for coils (material-independent) or other annealing material.
- the batch furnace is a single-coil furnace adapted for the heat treatment of individual coils.
- the invention is also applicable to single chamber furnaces suitable for the heat treatment of billets, billets or coils.
- the batch furnace has an oven housing 10 which essentially comprises a receiving space 11, a closable feed opening, not shown, and one or more convective heat transfer means 20 on the furnace good through a heat transfer medium.
- the respective means for convective heat transfer 20 in this case has a heating device 21 and a fan 22. The device for convective heat transfer 20 will be discussed later.
- the furnace housing 10 is formed in a hollow cylinder, wherein a housing part 10 a according to Fig. 1 each disposed at an axial end of the furnace housing 10. Furthermore, the oven housing 10 may also be formed by a different oven shape. For example, the oven housing 10 has a cuboid oven shape, in particular a box-shaped oven shape. The furnace housing 10 may also have only one housing part 10 a, for example, at one axial end of the furnace housing 10.
- the furnace housing 10 comprises a steel construction construction for housing stiffening, which is arranged on an outer surface of the furnace housing 10.
- the housing part 10a has in a peripheral region on an end face of the housing part 10a on a circumferential shape contour.
- the mold contour engages in the closed state of the furnace housing 10, in particular during operation of the batch furnace, in a complementary shape contour of a further housing part, not shown, in particular a middle part of the housing.
- the circumferential shape contour allows a tight connection, for example, of the housing part 10a with the middle part of the housing.
- the housing part 10a has on the mold contour two cylinders for securing the tight connection between the housing part 10a and the middle part of the housing.
- the housing part 10a may also have a plurality of cylinders on the mold contour.
- the cylinders can each be formed by a securing cylinder, in particular locking cylinder and / or locking cylinder.
- the housing part 10a has an inlet for an externally heated heat transfer medium.
- the housing part 10a comprises an outlet 12 for a discharge of combustion gases in an exhaust pipe.
- the furnace housing 10 has a thermal insulation, which is arranged inside the furnace housing 10.
- the thermal insulation protects the oven housing 10 from damage due to inadmissible temperature effect during the heat treatment of the furnace material. Furthermore, the heat insulation reduces energy losses during the heat treatment.
- the oven housing 10 may be formed in different variants, not shown.
- the oven housing 10 may be formed in three parts with an exchangeable housing middle part, in particular a center piece.
- the middle part of the two lateral Housing parts 10 a separated, so that the middle part can be replaced.
- the batch furnace can therefore be adapted to different Glühgutmaschine, especially different coils, lengthwise.
- the furnace housing 10 may also be formed in three parts.
- the housing middle part may be formed by a bottom piece in the second variant.
- the bottom piece can have a means of transport, in particular rollers, so that a movement of the middle part of the housing transverse to the longitudinal direction of the batch furnace is possible.
- the lateral housing parts 10a each have a housing extension in the longitudinal direction of the batch furnace.
- the housing extensions extend in the direction of the receiving space 11. In the closed state of the batch furnace, the housing extensions form the receiving space 11 with the bottom piece, wherein the receiving space 11 is bounded laterally by the housing parts 10a.
- the oven housing 10 may also be divided in another variant or formed in one piece.
- the oven housing 10 therefore limits the receiving space 11, in which the furnace material or annealing material is arranged during operation of the batch furnace.
- This is a single receiving space 11.
- the receiving space 11 can be charged in the batch furnace with the furnace housing 10 with a coil, in particular an aluminum coil.
- the receiving space 11 may have a bearing device for the furnace material, in particular for the aluminum coil.
- the bearing device is formed by a bearing block or a bearing rod.
- the storage device can be connected to the bottom of the receiving space 11.
- the coil can be deposited on its lateral surface.
- the coil may also be stored differently in the receiving space 11.
- the receiving space 11 is substantially hollow cylindrical and thus adapted approximately to the shape of the coil to be heated.
- the receiving space 11 forms an empty space in the unloaded state of the batch furnace.
- the receiving space 11 is accessible through a closable feed opening, not shown.
- the feed opening can be opened or closed by a lid which can be pivoted about a longitudinal axis of rotation of the oven housing 10 extending.
- This can be a Coil grab for charging the receiving space 11 are used.
- This version is particularly suitable for cylindrical oven housings.
- the loading opening can be opened or closed by an axial displacement of the lateral housing parts 10a, so that the receiving space 11 can be charged by a C-hook or a stacker.
- a lateral housing part 10a or both lateral housing parts 10a can be pivoted about a respective transverse axis of rotation extending transversely to the longitudinal direction of the furnace housing 10.
- the loading opening can also be opened or closed by a further not mentioned embodiment of a lid or a housing element.
- the fan 22 of the convective heat transfer device 20 and a nozzle array 30 is shown.
- the nozzle field 30 is arranged on a pressure side 24, not shown, of the fan 22.
- the nozzle field 30 has a central opening which forms an intake passage 31 of the fan 22.
- the fan 22 and the nozzle array 30 are arranged concentrically with each other.
- the suction passage 31 is thus formed between the fan 22 and the receiving space 11 for the circulation of the heat transfer medium.
- the intake passage 31 may also be formed by an opening which is formed at an arbitrary position, in particular a decentralized position, in the nozzle field 30.
- the fan 22 and the nozzle array 30 may also be arranged eccentrically to each other.
- the nozzle field 30 projects radially beyond the fan 22.
- the nozzle field 30 is designed such that the nozzle field 30 terminates fluid-tight on the inner wall of the furnace housing 10.
- the nozzle array 30 is formed such that a distance between a radial outer side, in particular a circumference, of the nozzle array 30 and the inner wall of the furnace housing 10 is formed.
- the distance between the nozzle field 30 and the inner wall of the furnace housing 10 may be formed by an annular gap.
- the nozzle field 30 is arranged directly in front of the suction side 23 of the fan 22. This allows a compact structural design of the fan 22 with the nozzle array 30 in the furnace housing 10.
- the receiving space 11 is increased with the same dimensions of the furnace housing 10 or the dimensions of the furnace housing 10 are reduced.
- the batch furnace can be downsized in its overall size.
- the fan 22 is fluidly connected through the intake passage 31 of the nozzle array 30 with the receiving space 11 of the furnace goods.
- the intake passage 31 of the nozzle array 30 is thus arranged directly opposite the suction side 23 of the fan 22.
- the nozzle array 30 according to Fig. 1 has a funnel-shaped nozzle plate 32.
- the nozzle plate 32 is annular.
- the nozzle plate 32 may also be formed by other geometric shapes.
- the nozzle plate 32 includes a plurality of tubular nozzles 33.
- the tubular nozzles 33 are arranged around a center on an inner side of the nozzle plate 32.
- the nozzles 33 also have a quadrangular or polygonal cross-sectional shape.
- the nozzles 33 may also be slit-shaped.
- the nozzles 33 may also have other cross-sectional shapes.
- the nozzles 33 may be tapered to one side.
- the nozzle plate 32 has nozzles 33 with different cross-sectional shapes and / or nozzle lengths.
- nozzle circuits 34a, 34b, 34c are referred to as nozzle circuits 34 for identical or approximately identical properties.
- a plurality of tubular nozzles 33 are arranged in a plurality of circular nozzle areas 35 on the inside of the nozzle plate 32.
- the nozzle regions 35 can also be designed differently.
- the nozzle areas 35 are formed star-shaped.
- the nozzle regions 35 may also be formed parallel to one another.
- the respective nozzles 33 can therefore also be arranged at different positions on the nozzle plate 32.
- the nozzle areas 35 are, as in FIG Fig. 1 can be seen, formed by an inner nozzle circuit 34a, a central nozzle circuit 34b and an outer nozzle circuit 34c.
- the inner nozzle circuit 34a is arranged on the nozzle plate 32 adjacent to the intake passage 31 of the fan 22.
- the outer nozzle circuit 34 c is disposed on the nozzle plate 32 adjacent to the inner wall of the furnace housing 10.
- the central nozzle circuit 34b is interposed on the nozzle plate 32 between the inner nozzle circuit 34a and the outer nozzle circuit 34c.
- the nozzle circuits 34 each have a distance from each other. In other words, the nozzle circuits 34 have different diameters.
- the inside of the nozzle plate 32 faces the receiving space 11.
- an outer side of the nozzle plate 32 faces the pressure side of the fan 22.
- the nozzle plate 32 is funnel-shaped such that in the heat treatment of the furnace good, the nozzles 33 each have a nozzle portion 35 are directed directly to the furnace material.
- the respective nozzle circuits 34 have nozzles 33 with an identical nozzle length.
- the nozzles 33 of the inner nozzle circle 34a are formed longer than the nozzles 33 of the central nozzle circle 34b.
- the nozzles 33 of the central nozzle circle 34b are formed longer than the nozzles 33 of the outer nozzle circle 34c.
- the length of the nozzles 33 decreases from the center of the nozzle plate 32 outwardly toward the periphery of the nozzle plate 32.
- the lengths of the nozzles 33 of the nozzle circuits 34 are formed such that the nozzles 33 in a side view, not shown, of the nozzle array 30 are formed with their free nozzle ends vertically aligned with each other. In other words, the respective free ends of the nozzles 33 form a vertical alignment in the side view.
- the respective nozzle circuits 34 may also have nozzles 33 with different nozzle lengths.
- Fig. 2 is a perspective longitudinal sectional view of the housing part 10a according to Fig. 1 shown.
- the oven housing 10, the housing part 10a and the nozzle array 30 is as in Fig. 1 described above.
- the housing part 10 a on a device for convective heat transfer 20 comprises a heating device 21 and a fan 22.
- the device for convective heat transfer 20 also includes a plurality of heating devices 21 and / or a plurality of fans 22.
- the fan 22 has a drive, in particular an electric motor, outside of the oven housing 10 is arranged.
- the drive is coupled in a known manner directly to the fan 22.
- the drive is connected by a belt drive or by a gearbox with the fan 22.
- a rotor of the fan 22 is arranged in the furnace housing 10.
- the fan 22 is formed by a centrifugal fan 27.
- the radial fan 27 has a plurality of flow channels 26 which are arranged on the pressure side 24 of the centrifugal fan 27.
- the flow channels 26 are arranged radially circumferentially directly on the radial fan 27.
- the flow channels 26 are arranged on the radial fan 27 completely radially encircling.
- the flow channels 26 can also be arranged partially radially on the centrifugal fan 27.
- the radial fan 27 is associated with the heating device 21.
- the radial fan 27 can be assigned to a plurality of heating devices 21.
- the heating device 21 is arranged concentrically to the radial fan 27 in a pressure channel 25 between the furnace housing 10 and the centrifugal fan 27.
- the heating device 21 is arranged on the pressure side 24 of the centrifugal fan 27 in the pressure channel 25 directly behind the flow channels 26.
- the heating device 21 is formed by a heating line 28 for a gaseous heating medium.
- the heating line 28 is arranged in the pressure channel, the radial fan 27 circumferentially.
- the heating line 28 is formed by a pipe, in particular by a steel pipe.
- the tube may be formed as a segment pipeline.
- the heating line 28 may also be formed by a hose, in particular a flexible steel hose.
- the heating line 28 may also be formed by a different design and made of other materials.
- the heating line 28 is connected to an inlet, not shown, for an externally heated heat transfer medium, in particular for gaseous heating medium, which heats the heating line 28.
- an externally heated heat transfer medium in particular for gaseous heating medium, which heats the heating line 28.
- the pressure channel 25 is formed on the pressure side 24 of the centrifugal fan 27.
- the pressure channel 25 is through a rear wall, a radially encircling side wall and the nozzle array 30 is formed. Further, the pressure channel 25 is fluidly connected through the nozzles 33 of the nozzle array 30 with the receiving space 11. The pressure channel 25 is thus limited on the receiving space 11 side facing by the nozzle plate 32 of the nozzle array 30.
- the nozzle field 30 is therefore also arranged on the pressure side 24 of the fan 27.
- the heat transfer medium is sucked through the intake passage 31 of the nozzle array 30 from the receiving space 11 through the centrifugal fan 27 during operation of the batch furnace during the heat treatment of the furnace material. Then, the heat transfer medium is deflected and accelerated in a radial direction to the suction direction of the heat transfer medium by the centrifugal fan 27. Finally, the heat transfer medium is passed through the flow channels 26 directly to the heating device 21.
- this increases the efficiency of the heat absorption of the heat transfer medium from the heating device 21.
- the heat transfer medium is thus heated in the pressure channel 25 by the heating device 21.
- the heat transfer medium is compressed by the centrifugal fan 27 in the pressure channel 25. Thereafter, the heated heat transfer medium for convective heat transfer to the furnace material is passed through the nozzles 33 of the nozzle array 30.
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Abstract
Die vorliegende Erfindung betrifft einen Chargenofen (10) für Glühgut mit einem Ofengehäuse (11), das eine verschließbare Beschickungsöffnung (12), einen Aufnahmeraum (13) für Ofengut und eine Einrichtung zur konvektiven Wärmeübertragung (20) auf das Ofengut durch ein Wärmeübertragungsmedium aufweist, wobei die Einrichtung zur konvektiven Wärmeübertragung (20) wenigstens eine Beheizungseinrichtung (21) und wenigstens einen Ventilator (22) umfasst, der im Ofengehäuse (11) angeordnet ist, wobei der Aufnahmeraum (13) auf der Saugseite (23) des Ventilators (22) angeordnet ist und wenigstens ein Düsenfeld (30) auf der Druckseite (24) des Ventilators (22) angeordnet ist, wobei das Düsenfeld (30) eine zentrale Öffnung aufweist, die einen Ansaugkanal (31) des Ventilators (22) bildet, und das Düsenfeld (30) radial über den Ventilator (22) vorsteht. Ferner betrifft die Erfindung ein Verfahren zur Wärmebehandlung eines Ofengutes.The present invention relates to an annealing batch furnace (10) having a furnace housing (11) having a closable charging port (12), a furnace material receiving space (13) and a convective heat transfer device (20) to the furnace good through a heat transfer medium. wherein the device for convective heat transfer (20) comprises at least one heating device (21) and at least one fan (22) which is arranged in the furnace housing (11), wherein the receiving space (13) on the suction side (23) of the fan (22). is arranged and at least one nozzle array (30) on the pressure side (24) of the fan (22) is arranged, wherein the nozzle array (30) has a central opening which forms an intake passage (31) of the fan (22), and the nozzle array (30) projects radially beyond the fan (22). Furthermore, the invention relates to a method for heat treatment of a furnace material.
Description
Die Erfindung betrifft einen Chargenofen für Glühgut und ein Verfahren zur Wärmebehandlung eines Ofengutes. Ein Chargenofen gemäß dem Oberbegriff des Patentanspruchs 1 ist beispielsweise aus
Im Industrieofenbau wird zwischen Durchlauföfen und Chargenöfen unterschieden. Chargenöfen weisen einen abgeschlossenen Ofenraum auf, in dem eine einzelne Charge wärmebehandelt wird. Beispiele für Chargenöfen sind Ein-Coil-Öfen, die eine flexible und individuelle Wärmebehandlung einzelner Coils ermöglichen. Ein weiteres Beispiel für einen Chargenofen sind sogenannte Kammeröfen, die zur Wärmebehandlung von Coils, Pressbolzen und Walzbarren eingesetzt werden.In industrial furnace construction, a distinction is made between continuous furnaces and batch furnaces. Batch furnaces have a closed furnace space in which a single batch is heat treated. Examples of batch furnaces are single-coil ovens, which allow flexible and individual heat treatment of individual coils. Another example of a batch furnace are so-called chamber furnaces, which are used for the heat treatment of coils, billets and ingots.
Der aus der eingangs genannten
Generell sind die bekannten Kammeröfen und Ein-Coil-Öfen aufwändig aufgebaut und relativ groß, was zu entsprechend großen Energieverlusten führt bzw. entsprechend umfangreiche Wärmedämmmaßnahmen erfordert.In general, the known chamber furnaces and one-coil furnaces are elaborately constructed and relatively large, which leads to correspondingly large energy losses or requires correspondingly extensive thermal insulation measures.
Der Erfindung liegt die Aufgabe zu Grunde, einen Chargenofen für Glühgut anzugeben, der durch einen verbesserten Aufbau eine kompakte Ofengröße ermöglicht und durch eine erhöhte Effizienz der Wärmebehandlung Energieverluste reduziert. Der Erfindung liegt ferner die Aufgabe zu Grunde ein Verfahren zur Wärmebehandlung eines Ofengutes anzugeben.The invention is based on the object of specifying a batch furnace for annealing material, which enables a compact furnace size through an improved structure and reduces energy losses through an increased efficiency of the heat treatment. The invention is also based on the object of specifying a method for heat treatment of a furnace material.
Erfindungsgemäß wird diese Aufgabe im Hinblick auf den Chargenofen durch den Gegenstand des Anspruchs 1 gelöst. Hinsichtlich des Verfahrens zur Wärmebehandlung wird die vorstehend genannte Aufgabe durch den Gegenstand des Anspruchs 19 gelöst.According to the invention this object is achieved with regard to the batch furnace by the subject of claim 1. With regard to the method for heat treatment, the above-mentioned object is achieved by the subject matter of claim 19.
Die Erfindung beruht auf dem Gedanken einen Chargenofen für Glühgut mit einem Ofengehäuse anzugeben, das eine verschließbare Beschickungsöffnung, einen Aufnahmeraum für Ofengut und eine Einrichtung zur konvektiven Wärmeübertragung auf das Ofengut durch ein Wärmeübertragungsmedium aufweist. Die Einrichtung zur konvektiven Wärmeübertragung umfasst wenigstens eine Beheizungseinrichtung und wenigstens einen Ventilator, der im Ofengehäuse angeordnet ist. Der Aufnahmeraum ist auf der Saugseite des Ventilators angeordnet und wenigstens ein Düsenfeld ist auf der Druckseite des Ventilators angeordnet. Dabei weist das Düsenfeld eine zentrale Öffnung auf, die einen Ansaugkanal des Ventilators bildet. Das Düsenfeld steht radial über den Ventilator vor.The invention is based on the idea to provide a batch furnace for Glühgut with a furnace housing having a closable feed opening, a receiving space for furnace material and means for convective heat transfer to the furnace material through a heat transfer medium. The device for convective heat transfer comprises at least one heating device and at least one fan, which is arranged in the furnace housing. The receiving space is arranged on the suction side of the fan and at least one nozzle field is arranged on the pressure side of the fan. In this case, the nozzle array has a central opening which forms an intake passage of the fan. The nozzle field projects radially over the fan.
Die Erfindung hat verschiedene Vorteile:
Durch das Düsenfeld auf der Druckseite des Ventilators wird das Wärmeübertragungsmedium gezielt auf das Ofengut bzw. auf ein Coil geleitet. Das Düsenfeld steht dabei über den Ventilator radial vor, sodass vorteilhafterweise auf der Druckseite des Ventilators ein Druckkanal ausgebildet ist. In dem Druckkanal wird das durch den Ventilator beschleunigte Wärmeübertragungsmedium verdichtet. Das Wärmeübertragungsmedium strömt anschließend mit hoher Geschwindigkeit durch das Düsenfeld in den Aufnahmeraum direkt auf das Ofengut bzw. Coil. Durch die Erhöhung der Geschwindigkeit des Wärmeübertragungsmediums steigt der Wirkungsgrad der Einrichtung zur konvektiven Wärmeübertragung auf das Ofengut. Somit wird die Effizienz des Chargenofens bei der Wärmebehandlung maßgeblich erhöht. Dies ermöglicht ferner eine Reduzierung der benötigten Energie für die Wärmebehandlung.The invention has several advantages:
Through the nozzle field on the pressure side of the fan, the heat transfer medium is directed to the furnace material or on a coil. The nozzle field projects radially over the fan, so that advantageously, a pressure channel is formed on the pressure side of the fan. In the pressure channel, the accelerated by the fan heat transfer medium is compressed. The heat transfer medium then flows at high speed through the nozzle array in the receiving space directly to the Ofengut or coil. Increasing the velocity of the heat transfer medium increases the efficiency of the convective heat transfer device on the kiln feed. Thus, the efficiency of the batch furnace during the heat treatment is significantly increased. This also allows a reduction in the energy required for the heat treatment.
Das Düsenfeld umfasst den Ansaugkanal, der auf der Saugseite des Ventilators angeordnet ist. Ferner begrenzt das Düsenfeld den Druckkanal auf einer dem Aufnahmeraum zugewandten Seite des Druckkanals. Das Düsenfeld weist dabei Düsen auf, durch die die Druckseite des Ventilators und somit der Druckkanal mit dem Aufnahmeraum fluidverbunden sind. Das Düsenfeld ist somit auf der Saugseite des Ventilators angeordnet und auf der Druckseite des Ventilators angeordnet. Dadurch wird vorteilhafterweise eine kompakte Bauweise des Chargenofens ermöglicht, wodurch sich der Platzbedarf des Ofens und die zu isolierende Außenfläche des Ofens verringert. Damit werden Wärmeverluste bzw. Energieverluste ohne zusätzliche Wärmedämmmaßnahmen gesenkt. Ferner werden aufgrund des effizient genutzten Ofenvolumens anfallende Spülverluste bei der Verwendung einer Schutzgasatmosphäre verringert.The nozzle array includes the intake passage located on the suction side of the fan. Furthermore, the nozzle field limits the pressure channel on a receiving space facing side of the pressure channel. The nozzle field in this case has nozzles through which the pressure side of the fan and thus the pressure channel with the receiving space are fluid-connected. The nozzle field is thus arranged on the suction side of the fan and arranged on the pressure side of the fan. This advantageously allows a compact construction of the batch furnace, which reduces the space requirement of the furnace and the outer surface of the furnace to be insulated. This reduces heat losses or energy losses without additional thermal insulation measures. Furthermore, due to the efficiently used furnace volume resulting flushing losses are reduced when using a protective gas atmosphere.
Als Wärmeübertragungsmedium kommen in Abhängigkeit vom Ofengut bspw. Heißluft, Abgas oder Schutzgas zum Einsatz.As a heat transfer medium depending on the kiln good example. Hot air, exhaust gas or inert gas are used.
Der erfindungsgemäße Chargenofen eignet sich besonders gut zur Wärmebehandlung von Aluminiumglühgut, insbesondere Aluminiumcoils.The batch furnace according to the invention is particularly suitable for the heat treatment of Aluminiumglühgut, especially Aluminiumcoils.
Die Beheizungseinrichtung kann dabei dem Ventilator zugeordnet sein. Beispielsweise ist die Beheizungseinrichtung direkt hinter der Druckseite des Ventilators angeordnet. Die Beheizungseinrichtung kann auch vor der Saugseite des Ventilators angeordnet sein. Es ist auch möglich, dass eine Beheizungseinrichtung, insbesondere eine erste Beheizungseinrichtung, direkt vor der Saugseite des Ventilators und/oder eine Beheizungseinrichtung, insbesondere eine zweite Beheizungseinrichtung, direkt hinter der Druckseite des Ventilators angeordnet sind. Die Beheizungseinrichtung ist ebenso wie der Ventilator im Ofengehäuse angeordnet.The heating device can be assigned to the fan. For example, the heating device is arranged directly behind the pressure side of the fan. The heating device can also be arranged in front of the suction side of the fan. It is also possible that a heating device, in particular a first heating device, directly in front of the suction side of the fan and / or a heating device, in particular a second heating device, are arranged directly behind the pressure side of the fan. The heating device is arranged in the same way as the fan in the furnace housing.
Ist die Beheizungseinrichtung direkt hinter der Druckseite des Ventilators angeordnet, strömt das kühle Wärmeübertragungsmedium durch den Ansaugkanal des Düsenfeldes in den Ventilator und tritt auf der Druckseite aus dem Ventilator wieder aus. Anschließend wird das Wärmeübertragungsmedium an die Beheizungseinrichtung geleitet und nimmt Wärme auf. Das Wärmeübertragungsmedium strömt danach durch das Düsenfeld in den Aufnahmeraum. Das Düsenfeld ist dabei derart ausgebildet, dass das erwärmte Wärmeübertragungsmedium auf das im Aufnahmeraum befindliche Ofengut geleitet wird.If the heating device is arranged directly behind the pressure side of the fan, the cool heat transfer medium flows through the intake channel of the nozzle field into the fan and exits from the fan on the pressure side. Subsequently, the heat transfer medium is conducted to the heating device and absorbs heat. The heat transfer medium then flows through the nozzle array into the receiving space. The nozzle field is designed such that the heated heat transfer medium is passed to the furnace goods located in the receiving space.
Bei gasbeheizten Ofenanlagen wird prinzipiell zwischen zwei möglichen Beheizungsarten unterschieden. Bei einer Beheizungsart feuert der Brenner direkt in den Ofen. Hierbei spricht man von einer direkten Beheizungseinrichtung, da die Abgase das Wärmeübertragungsmedium darstellen. Bei der indirekten Beheizungseinrichtung feuert der Brenner innerhalb eines geschlossenen Kreislaufs in ein Rohr, insbesondere ein Stahlrohr. Dabei überträgt das heiße Rohr die Wärme auf das Wärmeübertragungsmedium. Das bedeutet, dass kein Abgas ins Ofeninnere gelangt. Im Aluminiumsektor sind beide Arten vertreten.In gas-fired furnace systems, a distinction is made in principle between two possible types of heating. With a type of heating, the burner fires directly into the oven. This is called a direct heating device, since the exhaust gases represent the heat transfer medium. In the case of the indirect heating device, the burner fires within a closed circuit into a pipe, in particular a steel pipe. The hot tube transfers the heat to the heat transfer medium. This means that no exhaust gas gets inside the oven. In the aluminum sector, both species are represented.
Der im Ofengehäuse angeordnete Ventilator führt dazu, dass im Vergleich zu den bekannten Düsensystemen kürzere Strömungswege und damit geringere Druckverluste im Ofengehäuse realisiert werden.The fan arranged in the furnace housing means that, compared to the known nozzle systems, shorter flow paths and thus lower pressure losses in the furnace housing are realized.
Bevorzugte Ausführungsformen der Erfindung sind in den Unteransprüchen angegeben.Preferred embodiments of the invention are specified in the subclaims.
Bei einer besonders bevorzugten Ausführungsform sind der Ventilator und das Düsenfeld konzentrisch zueinander angeordnet. Dies hat den Vorteil, dass eine gleichmäßige Volumenverteilung des Wärmeübertragungsmediums auf der Druckseite des Ventilators ermöglicht wird. Das Wärmeübertragungsmedium wird somit gleichmäßig durch das Düsenfeld auf das Ofengut geleitet, wodurch eine homogene Wärmebehandlung erfolgt.In a particularly preferred embodiment, the fan and the nozzle array are arranged concentrically with each other. This has the advantage that a uniform volume distribution of the heat transfer medium on the pressure side of the fan is made possible. The heat transfer medium is thus uniformly passed through the nozzle array on the furnace material, whereby a homogeneous heat treatment takes place.
Bei einer bevorzugten Ausführungsform ist die Beheizungseinrichtung konzentrisch zu dem Ventilator in einem Druckkanal zwischen dem Ventilator und dem Ofengehäuse angeordnet. Die Beheizungseinrichtung für das Wärmeübertragungsmedium ist dabei direkt hinter der Druckseite des Ventilators im Ofengehäuse angeordnet. Der Druckkanal ist somit auf der Druckseite des Ventilators ausgebildet. Hierbei wird vorteilhafterweise das Wärmeübertragungsmedium durch den Ventilator direkt an die Beheizungseinrichtung geleitet. Dadurch werden Druckverluste verringert und die Effizienz der Wärmeaufnahme des Wärmeübertragungsmediums erhöht.In a preferred embodiment, the heating device is arranged concentrically with the fan in a pressure channel between the fan and the oven housing. The heating device for the heat transfer medium is arranged directly behind the pressure side of the fan in the furnace housing. The pressure channel is thus formed on the pressure side of the fan. In this case, the heat transfer medium is advantageously passed through the fan directly to the heating device. This reduces pressure losses and increases the heat absorption efficiency of the heat transfer medium.
Vorzugsweise schließt das Düsenfeld an einer Innenwand des Ofengehäuses fluiddicht ab. Der Druckkanal bildet somit einen geschlossenen Bereich auf der Druckseite des Ventilators, wodurch eine hohe Verdichtung des Wärmeübertragungsmediums ermöglicht wird. Dies hat den Vorteil, dass das Wärmeübertragungsmedium unter hohem Druck und somit mit hoher Geschwindigkeit durch das Düsenfeld in den Aufnahmeraum auf das Ofengut bzw. Coil geleitet wird. Der Effizienz der konvektiven Wärmeübertragung wird dadurch erhöht.The nozzle field preferably ends in a fluid-tight manner on an inner wall of the furnace housing. The pressure channel thus forms a closed area on the pressure side of the fan, whereby a high compression of the heat transfer medium is made possible. This has the advantage that the heat transfer medium is passed under high pressure and thus at high speed through the nozzle array into the receiving space on the Ofengut or coil. The efficiency of the convective heat transfer is thereby increased.
Weiter vorzugsweise ist das Düsenfeld direkt vor der Saugseite des Ventilators angeordnet. Dies ermöglicht eine kompakte Bauweise des Chargenofens, wodurch der Platzbedarf und die zu isolierende Außenfläche des Ofens reduziert wird.Further preferably, the nozzle array is arranged directly in front of the suction side of the fan. This allows a compact design of the batch furnace, whereby the space required and the outer surface of the furnace to be insulated is reduced.
Das Düsenfeld weist eine trichterförmige Düsenplatte auf. Durch die trichterförmige Ausbildung der Düsenplatte wird das beschleunigte Wärmeübertragungsmedium von der Druckseite des Ventilators auf das Ofengut fokussiert geleitet. Das Düsenfeld ist somit auch auf der Druckseite des Ventilators angeordnet. Vorteilhaft wird dadurch eine gezielte Wärmebehandlung des Ofenguts bzw. Coils ermöglicht.The nozzle field has a funnel-shaped nozzle plate. Due to the funnel-shaped design of the nozzle plate, the accelerated heat transfer medium is directed focused from the pressure side of the fan on the Ofengut. The nozzle field is thus also arranged on the pressure side of the fan. Advantageously, a targeted heat treatment of the furnace good or coils is made possible.
Die Düsenplatte ist vorzugsweise kreisringförmig ausgebildet. Die Düsenplatte umfasst dabei die zentrale Öffnung, die einen Ansaugkanal des Ventilators bildet.The nozzle plate is preferably annular. The nozzle plate comprises the central opening, which forms an intake passage of the fan.
Bei einer bevorzugten Ausführungsform weist die Düsenplatte mehrere rohrförmige und/oder schlitzförmige Düsen auf, die um eine Mitte der Düsenplatte auf einer Innenseite in wenigstens einem Düsenbereich kreisförmig angeordnet sind. Die Innenseite der Düsenplatte ist dabei dem Aufnahmeraum zugewandt. Die rohrförmigen und schlitzförmigen Düsen haben den Vorteil, dass durch jede Düse eine Bündelung und eine Erhöhung der Geschwindigkeit des Wärmeübertragungsmediums erfolgt. Somit wird eine gezielte Wärmebehandlung des Ofengutes ermöglicht und die Effizienz der konvektiven Wärmeübertragung erhöht.In a preferred embodiment, the nozzle plate has a plurality of tubular and / or slot-shaped nozzles which are circular about a center of the nozzle plate on an inner side in at least one nozzle region are arranged. The inside of the nozzle plate is facing the receiving space. The tubular and slot-shaped nozzles have the advantage that bundling and increasing the speed of the heat transfer medium takes place through each nozzle. Thus, a targeted heat treatment of the furnace material is possible and increases the efficiency of the convective heat transfer.
Vorzugsweise ist die Druckseite des Ventilators durch die rohrförmigen und/oder schlitzförmigen Düsen mit dem Aufnahmeraum fluidverbunden. Durch die Verbindung der Druckseite des Ventilators mit dem Aufnahmeraum wird eine Anströmung des Ofengutes durch das Wärmeübertragungsmedium und gleichermaßen eine Zirkulation des Wärmeübertragungsmediums im Ofengehäuse ermöglicht.Preferably, the pressure side of the fan is fluidly connected to the receiving space through the tubular and / or slot-shaped nozzles. By connecting the pressure side of the fan with the receiving space, a flow of the furnace good through the heat transfer medium and a circulation of the heat transfer medium in the furnace housing is made possible.
Der Ansaugkanal des Düsenfeldes ist der Saugseite des Ventilators direkt gegenüber angeordnet. Dies hat den Vorteil, dass eine kompakte und geradlinige Bauform des Ansaugkanals ermöglicht wird. Somit werden die Druckverluste beim Ansaugen des Wärmeübertragungsmediums verringert. Der Ansaugkanal ist zwischen dem Ventilator und dem Aufnahmeraum für die Zirkulation des Wärmeübertragungsmediums ausgebildet. Durch den Ansaugkanal wird das Wärmeübertragungsmedium durch den Ventilator angesaugt. Durch die zentrale Ausbildung des Ansaugkanals wird vorteilhafterweise eine Strömungsführung des Wärmeübertragungsmediums bei der Wärmebehandlung des Ofengutes im Ofengehäuse verbessert.The intake duct of the nozzle field is arranged directly opposite the suction side of the fan. This has the advantage that a compact and rectilinear design of the intake passage is made possible. Thus, the pressure losses are reduced during the suction of the heat transfer medium. The suction passage is formed between the fan and the receiving space for the circulation of the heat transfer medium. Through the intake passage, the heat transfer medium is sucked by the fan. Due to the central design of the intake duct, a flow guidance of the heat transfer medium during the heat treatment of the furnace good in the furnace housing is advantageously improved.
Bei einer besonders bevorzugten Ausführungsform sind wenigstens zwei Ventilatoren in Gegenüberstellung auf beiden Seiten des Aufnahmeraumes angeordnet. Jedem Ventilator ist wenigstens eine Beheizungseinrichtung und/oder wenigstens ein Einlass für ein extern erwärmtes Wärmeübertragungsmedium zugeordnet. Die Beheizungseinrichtung bzw. der Einlass für das extern erwärmte Wärmeübertragungsmedium und der jeweils zugeordnete Ventilator bilden eine Einheit, die die Einrichtung zur konvektiven Wärmeübertragung bildet. Diese Ausführungsform hat den Vorteil, dass das Ofengut von zwei Seiten gleichmäßig erwärmt wird. Die Ausführungsform eignet sich besonders zum Erwärmen von Coils, insbesondere Aluminiumcoils, sowie ferner für andere Ofengüter. Vorzugsweise weist jeweils ein Ventilator wenigstens einen Strömungskanal auf, der auf der Druckseite des Ventilators angeordnet ist. Der Strömungskanal leitet das Wärmeübertragungsmedium an wenigstens eine Beheizungseinrichtung. Der Ventilator kann auch mehrere Strömungskanäle aufweisen, die am Ventilator radial umlaufend angeordnet sind. Vorteilhafterweise wird das durch den Ventilator beschleunigte Wärmeübertragungsmedium durch die Strömungskanäle gezielt an die Beheizungseinrichtung geführt bzw. geleitet. Dadurch wird die Effizienz der Wärmeaufnahme des Wärmeübertragungsmediums von der Beheizungseinrichtung erhöht.In a particularly preferred embodiment, at least two fans are arranged in juxtaposition on both sides of the receiving space. Each fan is associated with at least one heating device and / or at least one inlet for an externally heated heat transfer medium. The heating means and the inlet for the externally heated heat transfer medium and the respective associated fan form a unit which forms the means for convective heat transfer. This embodiment has the advantage that the furnace material is heated uniformly from two sides. The embodiment is particularly suitable for heating coils, in particular aluminum coils, as well as for other kiln goods. Preferably, each fan has at least one flow channel, which is arranged on the pressure side of the fan. The flow channel directs the heat transfer medium to at least one heating device. The fan may also have a plurality of flow channels, which are arranged radially circumferentially on the fan. Advantageously, the accelerated by the fan heat transfer medium is guided or directed by the flow channels targeted to the heating device. Thereby, the efficiency of the heat absorption of the heat transfer medium is increased by the heating device.
Weiter vorzugsweise ist wenigstens ein Ventilator durch einen Radialventilator gebildet ist. Dadurch wird ermöglicht, dass durch den Radialventilator das Wärmeübertragungsmedium aus dem Aufnahmeraum gesaugt und radial zur Ansaugrichtung durch den Ventilator wieder abgegeben wird. Der Radialventilator kann somit an einem Gehäuseende des Ofengehäuses angeordnet werden, da das Wärmeübertragungsmedium aus dem Aufnahmeraum bzw. von vorne angesaugt wird. Vorteilhafterweise resultiert daraus ein kompakter Aufbau der Einrichtung zur konvektiven Wärmübertragung und somit des Chargenofens.More preferably, at least one fan is formed by a centrifugal fan. This makes it possible that the heat transfer medium is sucked out of the receiving space by the radial fan and discharged radially to the suction direction by the fan again. The radial fan can thus be arranged at a housing end of the furnace housing, since the heat transfer medium is sucked from the receiving space or from the front. Advantageously, this results in a compact design of the device for convective heat transfer and thus of the batch furnace.
Wenigstens ein Ventilator weist einen Antrieb auf, der außerhalb des Ofengehäuses angeordnet ist. Dies hat den Vorteil, dass der Ventilatorantrieb einer verhältnismäßig geringen Wärmebelastung ausgesetzt ist. Für den Antrieb sind somit keine besonderen wärmedämmtechnischen oder wärmeabführenden Maßnahmen erforderlich.At least one fan has a drive which is arranged outside of the oven housing. This has the advantage that the fan drive is exposed to a relatively low heat load. For the drive thus no special thermal insulation or heat dissipation measures are required.
Der Aufnahmeraum ist im Wesentlichen hohlzylindrisch ausgebildet, wobei die Ventilatoren an den Stirnseiten des Aufnahmeraumes angeordnet sind. Dadurch wird eine besondere kompakte Bauweise des Chargenofens erreicht, die eine schnelle, effiziente und homogene Erwärmung des Ofengutes ermöglicht.The receiving space is formed substantially hollow cylindrical, wherein the fans are arranged on the end sides of the receiving space. As a result, a special compact design of the batch furnace is achieved, which allows a fast, efficient and homogeneous heating of the furnace material.
Bei einer weiteren bevorzugten Ausführungsform weist das Ofengehäuse wenigstens einen Einlass für ein extern erwärmtes Wärmeübertragungsmedium auf. Die Position des Einlasses für das extern erwärmte Wärmeübertragungsmedium kann sich an einer beliebigen Stelle des Ofens befinden. Der Einlass ermöglicht dabei den Zugang zum Ofeninneren bzw. zum Aufnahmeraum für das Ofengut, so dass das extern erwärmte Wärmeübertragungsmedium in den Aufnahmeraum gelangen kann. Beispielsweise werden als extern erwärmtes Wärmeübertragungsmedium Abgase einer anderen Ofenanlage verwendet. Vorzugsweise ist der Einlass für das extern erwärmte Wärmeübertragungsmedium direkt hinter der Druckseite des Ventilators angeordnet. Die Erfindung ist dabei nicht auf diese Anordnung eingeschränkt.In a further preferred embodiment, the furnace housing has at least one inlet for an externally heated heat transfer medium. The position of the externally heated heat transfer medium inlet may be anywhere in the furnace. The inlet thereby allows access to the furnace interior or to the receiving space for the furnace material, so that the externally heated Heat transfer medium can get into the receiving space. For example, used as externally heated heat transfer medium exhaust gases from another furnace system. Preferably, the inlet for the externally heated heat transfer medium is located directly behind the pressure side of the fan. The invention is not limited to this arrangement.
Durch den Einlass kann ein Wärmeübertragungsmedium, vorzugsweise Heißluft und/oder heißes Schutzgas und/oder bei Verwendung eines Strahlrohres auch heiße Abgase dem Chargenofen zugeführt werden, dass extern, d.h. außerhalb des Ofens erwärmt wird. Es ist möglich, einen oder mehrere Einlässe für das extern erwärmte Wärmeübertragungsmedium mit einer oder mehreren Beheizungseinrichtungen zu kombinieren, bspw. um ein vorgewärmtes Wärmeübertragungsmedium im Ofen durch die Beheizungseinrichtung auf die gewünschte Endtemperatur zu bringen.Through the inlet, a heat transfer medium, preferably hot air and / or hot inert gas and / or when using a jet pipe and hot exhaust gases are supplied to the batch furnace that externally, i. is heated outside the furnace. It is possible to combine one or more inlets for the externally heated heat transfer medium with one or more heating means, for example to bring a preheated heat transfer medium in the oven through the heating means to the desired final temperature.
Bei einer bevorzugten Ausführungsform weist die Beheizungseinrichtung eine Heizleitung für eine gasförmiges Heizmedium auf. Die Heizleitung kann durch ein Stahlrohr, insbesondere durch ein Segmentrohr gebildet sein. Die Heizleitung kann dabei im Druckkanal den Ventilator umlaufend angeordnet sein. Die Heizleitung ist vorzugsweise auf der Druckseite des Ventilators angeordnet. Durch die Heizleitung kann vorteilhafterweise das extern erwärmte Wärmeübertragungsmedium geführt werden, wodurch die Heizleitung erwärmt wird. Durch die erwärmte Heizleitung wird ferner das im Ofengehäuse zirkulierende Wärmeübertragungsmedium erwärmt.In a preferred embodiment, the heating device has a heating line for a gaseous heating medium. The heating cable can be formed by a steel tube, in particular by a segment tube. The heating cable can be arranged circumferentially in the pressure channel, the fan. The heating line is preferably arranged on the pressure side of the fan. Through the heating line, the externally heated heat transfer medium can be advantageously performed, whereby the heating cable is heated. The heated heating line also heats the circulating heat transfer medium in the oven housing.
Bei einem erfindungsgemäßen Verfahren zur Wärmebehandlung eines Ofengutes mit einem Chargenofen wird das Ofengut in einem Aufnahmeraum des Chargenofens angeordnet. Ein Wärmeübertragungsmedium wird durch einen Ventilator, insbesondere einen Radialventilator, an eine Beheizungseinrichtung geleitet. Dabei wird das Wärmeübertragungsmedium durch die Beheizungseinrichtung erwärmt. Anschließend wird das erwärmte Wärmeübertragungsmedium durch ein Düsenfeld auf das Ofengut zur konvektiven Wärmeübertragung geleitet.In a method according to the invention for the heat treatment of a furnace good with a batch furnace, the furnace material is arranged in a receiving space of the batch furnace. A heat transfer medium is passed through a fan, in particular a radial fan, to a heating device. In this case, the heat transfer medium is heated by the heating device. Subsequently, the heated heat transfer medium is passed through a nozzle array on the furnace material for convective heat transfer.
Zu den Vorteilen des Verfahrens zur Wärmebehandlung eines Ofengutes mit einem erfindungsgemäßen Chargenofen wird auf die im Zusammenhang mit dem Chargenofen erläuterten Vorteile verwiesen. Darüber hinaus kann das Verfahren alternativ oder zusätzlich einzelne oder eine Kombination mehrerer zuvor in Bezug auf den Chargenofen genannte Merkmale aufweisen.To the advantages of the method for heat treatment of a furnace material with a batch furnace according to the invention is in connection with the Batch oven explained advantages referenced. In addition, the method may alternatively or additionally comprise a single or a combination of several features mentioned above with respect to the batch furnace.
Die Erfindung wird nachstehend mit weiteren Einzelheiten unter Bezug auf die beigefügten Zeichnungen näher erläutert. Die dargestellten Ausführungsformen stellen Beispiele dar, wie der erfindungsgemäße Chargenofen ausgestaltet sein kann.The invention will be explained in more detail below with further details with reference to the accompanying drawings. The illustrated embodiments illustrate examples of how the batch furnace according to the invention can be configured.
In diesen zeigen,
- Fig. 1
- eine perspektivische Ansicht eines Gehäuseteils eines Chargenofens mit einem Düsenfeld nach einem erfindungsgemäßen Ausführungsbeispiel, und
- Fig. 2
- eine perspektivische Längsschnittansicht durch das Gehäuseteil des Chargenofens nach
Fig. 1 .
- Fig. 1
- a perspective view of a housing part of a batch furnace with a nozzle array according to an embodiment of the invention, and
- Fig. 2
- a perspective longitudinal sectional view through the housing part of the batch furnace after
Fig. 1 ,
Ein Chargenofen mit einem Gehäuseteil 10a des Ofengehäuses gemäß
Der Chargenofen weist ein Ofengehäuse 10 auf, das im Wesentlichen einen Aufnahmeraum 11, eine nicht dargestellte verschließbare Beschickungsöffnung und eine oder mehrere Einrichtungen zur konvektiven Wärmeübertragung 20 auf das Ofengut durch ein Wärmeübertragungsmedium umfasst. Die jeweilige Einrichtung zur konvektiven Wärmeübertragung 20 weist dabei eine Beheizungseinrichtung 21 und einen Ventilator 22 auf. Auf die Einrichtung zur konvektiven Wärmeübertragung 20 wird später näher eingegangen.The batch furnace has an
Das Ofengehäuse 10 ist hohlzylinderförmig ausgebildet, wobei ein Gehäuseteil 10a gemäß
Das Gehäuseteil 10a weist in einem Umfangsbereich an einer Stirnseite des Gehäuseteils 10a eine umlaufende Formkontur auf. Die Formkontur greift im geschlossenen Zustand des Ofengehäuses 10, insbesondere im Betrieb des Chargenofens, in eine komplementäre Formkontur eines nicht dargestellten weiteren Gehäuseteils, insbesondere eines Gehäusemittelteils ein. Die umlaufende Formkontur ermöglicht eine dichte Verbindung bspw. des Gehäuseteils 10a mit dem Gehäusemittelteil. Das Gehäuseteil 10a weist an der Formkontur zwei Zylinder zur Sicherung der dichten Verbindung zwischen dem Gehäuseteil 10a und dem Gehäusemittelteil auf. Das Gehäuseteil 10a kann an der Formkontur auch mehrere Zylinder aufweisen. Die Zylinder können dabei jeweils durch einen Sicherungszylinder, insbesondere Verschlusszylinder und/oder Verriegelungszylinder gebildet sein. Des Weiteren weist das Gehäuseteil 10a einen Einlass für ein extern erwärmtes Wärmübertragungsmedium auf. Ebenso umfasst das Gehäuseteil 10a einen Austritt 12 für eine Abführung von Brennergasen in eine Abgasleitung.The
Ferner weist das Ofengehäuse 10 eine Wärmedämmung auf, die innen am Ofengehäuse 10 angeordnet ist. Die Wärmedämmung schützt das Ofengehäuse 10 vor Beschädigung durch unzulässige Temperatureinwirkung bei der Wärmebehandlung des Ofengutes. Des Weiteren werden durch die Wärmedämmung Energieverluste bei der Wärmebehandlung reduziert.Furthermore, the
Das Ofengehäuse 10 kann in unterschiedlichen nicht dargestellten Varianten ausgebildet sein. Bei einer ersten Variante kann das Ofengehäuse 10 dreigeteilt mit einem auswechselbaren Gehäusemittelteil, insbesondere einem Mittelstück, ausgebildet sein. Dabei ist das Gehäusemittelteil von den beiden seitlichen Gehäuseteilen 10a abgetrennt, sodass das Gehäusemittelteil ausgetauscht werden kann. Der Chargenofen kann daher an unterschiedliche Glühgutteile, insbesondere unterschiedliche Coils, der Länge nach angepasst werden.The
Bei einer zweiten Variante kann das Ofengehäuse 10 ebenso dreiteilig ausgebildet sein. Im Unterschied zur ersten Variante kann bei der zweiten Variante das Gehäusemittelteil durch ein Bodenstück gebildet sein. Das Bodenstück kann dabei ein Transportmittel, insbesondere Rollen aufweisen, sodass eine Bewegung des Gehäusemittelteils quer zur Längsrichtung des Chargenofens möglich ist. Die seitlichen Gehäuseteile 10a weisen dabei jeweils eine Gehäuseverlängerung in Längsrichtung des Chargenofens auf. Die Gehäuseverlängerungen erstrecken sich dabei in Richtung des Aufnahmeraums 11. Im geschlossenen Zustand des Chargenofens bilden die Gehäuseverlängerungen mit dem Bodenstück den Aufnahmeraum 11, wobei der Aufnahmeraum 11 seitlich durch die Gehäuseteile 10a begrenzt ist. Das Ofengehäuse 10 kann ferner auch in einer anderen Variante geteilt oder einteilig ausgebildet sein.In a second variant, the
Das Ofengehäuse 10 gemäß
Die Beschickungsöffnung kann dabei durch einen Deckel geöffnet bzw. verschlossen werden, der um eine in Längsrichtung des Ofengehäuses 10 verlaufende Längsdrehachse verschwenkt werden kann. Hierbei kann ein Spulengreifer zum Chargieren des Aufnahmeraums 11 zum Einsatz kommen. Diese Ausführung ist besonders für zylindrische Ofengehäuse geeignet. Des Weiteren kann die Beschickungsöffnung durch ein axiales Verschieben der seitlichen Gehäuseteile 10a geöffnet bzw. geschlossen werden, sodass der Aufnahmeraum 11 durch einen C-Haken oder einen Stapler chargiert werden kann. Beispielsweise ist bei einer weiteren Ausführung des Ofengehäuses 10 ein seitliches Gehäuseteil 10a oder beide seitlichen Gehäuseteile 10a um jeweils eine quer zur Längsrichtung des Ofengehäuses 10 verlaufende Querdrehachse verschwenkbar. Die Beschickungsöffnung kann auch durch eine weitere nicht genannte Ausführung eines Deckels oder eines Gehäuseelements geöffnet bzw. geschlossen werden.The feed opening can be opened or closed by a lid which can be pivoted about a longitudinal axis of rotation of the
In der perspektivischen Ansicht gemäß
Das Düsenfeld 30 ist direkt vor der Saugseite 23 des Ventilators 22 angeordnet. Dies ermöglicht einen kompakten konstruktiven Aufbau des Ventilators 22 mit dem Düsenfeld 30 im Ofengehäuse 10. Vorteilhafterweise kann dadurch der Aufnahmeraum 11 bei gleichen Abmessungen des Ofengehäuses 10 vergrößert oder die Abmessungen des Ofengehäuses 10 reduziert werden. Somit kann der Chargenofen in seiner Gesamtgröße verkleinert werden.The
Der Ventilator 22 ist durch den Ansaugkanal 31 des Düsenfeldes 30 mit dem Aufnahmeraum 11 des Ofengutes fluidverbunden. Der Ansaugkanal 31 des Düsenfeldes 30 ist somit der Saugseite 23 des Ventilators 22 direkt gegenüber angeordnet. Das Düsenfeld 30 gemäß
In der nachfolgenden Beschreibung werden die Düsenkreise 34a, 34b, 34c bei identischen oder annähernd identischen Eigenschaften als Düsenkreise 34 bezeichnet.In the following description, the
Gemäß
Die Innenseite der Düsenplatte 32 ist dem Aufnahmeraum 11 zugewandt. Somit ist eine Außenseite der Düsenplatte 32 der Druckseite des Ventilators 22 zugewandt. Die Düsenplatte 32 ist derart trichterförmig ausgebildet, dass bei der Wärmebehandlung des Ofengutes die Düsen 33 jeweils eines Düsenbereichs 35 direkt auf das Ofengut gerichtet sind. Die jeweiligen Düsenkreise 34 weisen Düsen 33 mit einer identischen Düsenlänge auf. Die Düsen 33 des inneren Düsenkreises 34a sind dabei länger ausgebildet als die Düsen 33 des mittleren Düsenkreises 34b. Die Düsen 33 des mittleren Düsenkreises 34b sind dabei länger ausgebildet als die Düsen 33 des äußeren Düsenkreises 34c. Mit anderen Worten verringert sich die Länge der Düsen 33 von der Mitte der Düsenplatte 32 ausgehend nach außen hin zum Umfang der Düsenplatte 32. Die Längen der Düsen 33 der Düsenkreise 34 sind dabei derart ausgebildet, dass die Düsen 33 in einer nicht dargestellten Seitenansicht des Düsenfeldes 30 mit deren freien Düsenenden vertikal fluchtend zueinander ausgebildet sind. Mit anderen Worten bilden die jeweiligen freien Enden der Düsen 33 in der Seitenansicht eine vertikale Flucht. Die jeweiligen Düsenkreise 34 können auch Düsen 33 mit unterschiedlich Düsenlängen aufweisen.The inside of the
Gemäß
Wie in
Bei dem Gehäuseteil 10a gemäß
Dem Radialventilator 27 ist die Beheizungseinrichtung 21 zugeordnet. Dem Radialventilator 27 können dabei mehrere Beheizungseinrichtungen 21 zugeordnet sein. Die Beheizungseinrichtung 21 ist konzentrisch zum Radialventilator 27 in einem Druckkanal 25 zwischen dem Ofengehäuse 10 und dem Radialventilator 27 angeordnet. Die Beheizungseinrichtung 21 ist dabei auf der Druckseite 24 des Radialventilators 27 im Druckkanal 25 direkt hinter den Strömungskanälen 26 angeordnet.The radial fan 27 is associated with the
Wie in
Der Druckkanal 25 ist auf der Druckseite 24 des Radialventilators 27 ausgebildet. Der Druckkanal 25 ist durch eine Rückwand, eine radial umlaufende Seitenwand und das Düsenfeld 30 gebildet. Ferner ist der Druckkanal 25 durch die Düsen 33 des Düsenfeldes 30 mit dem Aufnahmeraum 11 fluidverbunden. Der Druckkanal 25 ist somit auf der dem Aufnahmeraum 11 zugewandten Seite durch die Düsenplatte 32 des Düsenfeldes 30 begrenzt. Das Düsenfeld 30 ist daher auch auf der Druckseite 24 des Ventilators 27 angeordnet.The
Dabei wird im Betrieb des Chargenofens bei der Wärmebehandlung des Ofengutes das Wärmeübertragungsmedium durch den Ansaugkanal 31 des Düsenfeldes 30 aus dem Aufnahmeraum 11 durch den Radialventilator 27 angesaugt. Eine Stirnseite des Radialventilators 27 bildet dabei die Saugseite 23. Anschließend wird das Wärmeübertragungsmedium in eine radiale Richtung zur Ansaugrichtung des Wärmeübertragungsmediums durch den Radialventilator 27 umgelenkt und beschleunigt. Abschließend wird das Wärmeübertragungsmedium durch die Strömungskanäle 26 direkt an die Beheizungseinrichtung 21 geleitet. Vorteilhafterweise wird dadurch die Effizienz der Wärmeaufnahme des Wärmeübertragungsmediums von der Beheizungseinrichtung 21 erhöht. Das Wärmeübertragungsmedium wird somit im Druckkanal 25 durch die Beheizungseinrichtung 21 erwärmt. Ebenso wird das Wärmeübertragungsmedium durch den Radialventilator 27 im Druckkanal 25 verdichtet. Durch die Düsen 33 des Düsenfeldes 30 wird danach das erwärmte Wärmeübertragungsmedium zur konvektiven Wärmeübertragung auf das Ofengut geleitet.In this case, the heat transfer medium is sucked through the
- 1010
- Ofengehäusefurnace housing
- 1111
- Aufnahmeraumaccommodation space
- 1212
- Austritt zur Abführung von BrennergasenExit to the discharge of burner gases
- 2020
- Einrichtung zur konvektiven WärmeübertragungDevice for convective heat transfer
- 2121
- Beheizungseinrichtungheating device
- 2222
- Ventilatorfan
- 2323
- Saugseitesuction
- 2424
- Druckseitepressure side
- 2525
- Druckkanalpressure channel
- 2626
- Strömungskanalflow channel
- 2727
- Radialventilatorcentrifugal fan
- 2828
- Heizleitungheating
- 3030
- Düsenfeldnozzle array
- 3131
- Ansaugkanalintake port
- 3232
- Düsenplattenozzle plate
- 3333
- Düsejet
- 3434
- Düsenkreisnozzles circle
- 34a34a
- innerer Düsenkreisinner nozzle circle
- 34b34b
- mittlerer Düsenkreismiddle nozzle circle
- 34c34c
- äußerer Düsenkreisouter nozzle circle
- 3535
- Düsenbereichnozzle area
Claims (19)
dadurch gekennzeichnet, dass
das Düsenfeld (30) eine zentrale Öffnung aufweist, die einen Ansaugkanal (31) des Ventilators (22) bildet, und das Düsenfeld (30) radial über den Ventilator (22) vorsteht.An annealing batch furnace comprising an oven housing (10) having a closable feed opening, a furnace chamber receiving space (11) and a convective heat transfer means (20) to the furnace material through a heat transfer medium, the convective heat transfer means (20) comprising at least one Heating device (21) and at least one fan (22) which is arranged in the furnace housing (10), wherein the receiving space (11) on the suction side (23) of the fan (22) is arranged and at least one nozzle array (30) on the Pressure side (24) of the fan (22) is arranged,
characterized in that
the nozzle array (30) has a central opening forming an intake passage (31) of the fan (22) and the nozzle array (30) projects radially beyond the fan (22).
dadurch gekennzeichnet, dass
der Ventilator (22) und das Düsenfeld (30) konzentrisch zueinander angeordnet sind.Batch furnace according to claim 1,
characterized in that
the fan (22) and the nozzle array (30) are arranged concentrically with each other.
dadurch gekennzeichnet, dass
die Beheizungseinrichtung (21) konzentrisch zu dem Ventilator (22) in einem Druckkanal (25) zwischen dem Ventilator (22) und dem Ofengehäuse (10) angeordnet ist.Batch furnace according to claim 1 or 2,
characterized in that
the heating device (21) is arranged concentrically to the fan (22) in a pressure channel (25) between the fan (22) and the furnace housing (10).
dadurch gekennzeichnet, dass
das Düsenfeld (30) an einer Innenwand des Ofengehäuses (10) fluiddicht abschließt.Batch furnace according to one of the preceding claims,
characterized in that
the nozzle field (30) on an inner wall of the furnace housing (10) fluid-tight manner.
dadurch gekennzeichnet, dass
das Düsenfeld (30) direkt vor der Saugseite (23) des Ventilators (22) angeordnet ist.Batch furnace according to one of the preceding claims,
characterized in that
the nozzle field (30) is arranged directly in front of the suction side (23) of the fan (22).
dadurch gekennzeichnet, dass
das Düsenfeld (30) eine trichterförmige Düsenplatte (32) aufweist.Batch furnace according to one of the preceding claims,
characterized in that
the nozzle field (30) has a funnel-shaped nozzle plate (32).
dadurch gekennzeichnet, dass
die Düsenplatte (32) kreisringförmig ausgebildet ist.Batch furnace according to claim 6,
characterized in that
the nozzle plate (32) is annular.
dadurch gekennzeichnet, dass
die Düsenplatte (32) mehrere rohrförmige und/oder schlitzförmige Düsen (33) aufweist, die um eine Mitte der Düsenplatte (32) auf einer Innenseite in wenigstens einem Düsenbereich (34) kreisförmig angeordnet sind.Batch furnace according to claim 6 or 7,
characterized in that
the nozzle plate (32) has a plurality of tubular and / or slot-shaped nozzles (33) which are arranged in a circle around a center of the nozzle plate (32) on an inner side in at least one nozzle region (34).
dadurch gekennzeichnet, dass
die Druckseite (24) des Ventilators (22) durch die rohrförmigen und/oder schlitzförmigen Düsen (33) mit dem Aufnahmeraum (11) fluidverbunden ist.Batch furnace according to one of the preceding claims,
characterized in that
the pressure side (24) of the fan (22) is fluidly connected to the receiving space (11) through the tubular and / or slot-shaped nozzles (33).
dadurch gekennzeichnet, dass
der Ansaugkanal (31) des Düsenfeldes (30) der Saugseite (23) des Ventilators (22) direkt gegenüber angeordnet ist.Batch furnace according to one of the preceding claims,
characterized in that
the suction channel (31) of the nozzle field (30) of the suction side (23) of the fan (22) is arranged directly opposite.
dadurch gekennzeichnet, dass
der Ansaugkanal (31) zwischen dem Ventilator (22) und dem Aufnahmeraum (11) für die Zirkulation des Wärmeübertragungsmediums ausgebildet ist.Batch furnace according to claim according to one of the preceding claims,
characterized in that
the intake passage (31) is formed between the fan (22) and the receiving space (11) for circulating the heat transfer medium.
dadurch gekennzeichnet, dass
wenigstens zwei Ventilatoren (22) in Gegenüberstellung auf beiden Seiten des Aufnahmeraumes (11) angeordnet sind, wobei jedem Ventilator (22) wenigstens eine Beheizungseinrichtung (21) und/oder wenigstens ein Einlass für ein extern erwärmtes Wärmeübertragungsmedium zugeordnet ist.Batch furnace according to one of the preceding claims,
characterized in that
at least two fans (22) are arranged in juxtaposition on both sides of the receiving space (11), wherein each fan (22) is associated with at least one heating device (21) and / or at least one inlet for an externally heated heat transfer medium.
dadurch gekennzeichnet, dass
jeweils ein Ventilator (22) wenigstens einen Strömungskanal (26) aufweist, der auf der Druckseite (24) des Ventilators (22) angeordnet ist und der Strömungskanal (26) das Wärmeübertragungsmedium an wenigstens eine Beheizungseinrichtung (21) leitet.Batch furnace according to one of the preceding claims,
characterized in that
in each case a fan (22) has at least one flow channel (26) which is arranged on the pressure side (24) of the fan (22) and the flow channel (26) directs the heat transfer medium to at least one heating device (21).
dadurch gekennzeichnet, dass
wenigstens ein Ventilator (22) durch einen Radialventilator (27) gebildet ist.Batch furnace according to one of the preceding claims,
characterized in that
at least one fan (22) is formed by a radial fan (27).
dadurch gekennzeichnet, dass
wenigstens ein Ventilator (22) einen Antrieb aufweist, der außerhalb des Ofengehäuses (10) angeordnet ist.Batch furnace according to one of the preceding claims,
characterized in that
at least one fan (22) has a drive which is arranged outside of the oven housing (10).
dadurch gekennzeichnet, dass
der Aufnahmeraum (11) im Wesentlichen hohlzylindrisch ausgebildet ist, wobei die Ventilatoren (22) an den Stirnseiten des Aufnahmeraumes (11) angeordnet sind.Batch furnace according to one of the preceding claims,
characterized in that
the receiving space (11) is formed substantially hollow cylindrical, wherein the fans (22) are arranged on the end faces of the receiving space (11).
dadurch gekennzeichnet, dass
das Ofengehäuse (10) wenigstens einen Einlass für ein extern erwärmtes Wärmeübertragungsmedium aufweist.Batch furnace according to one of the preceding claims,
characterized in that
the furnace housing (10) has at least one inlet for an externally heated heat transfer medium.
dadurch gekennzeichnet, dass
die Beheizungseinrichtung (21) eine Heizleitung (28) für ein gasförmiges Heizmedium aufweist.Batch furnace according to one of the preceding claims,
characterized in that
the heating device (21) has a heating line (28) for a gaseous heating medium.
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WO2022146153A1 (en) * | 2020-12-31 | 2022-07-07 | Seco/Warwick Spółka Akcyjna | Modular device for blowing gas onto the surface of the heat-treated charge |
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DE102018112934A1 (en) * | 2018-05-30 | 2019-12-05 | Benteler Automobiltechnik Gmbh | Method for producing a motor vehicle component from a high-strength steel alloy with ductile properties and motor vehicle component |
CN118007039B (en) * | 2024-02-23 | 2024-12-10 | 东莞国铝实业有限公司 | Aluminum alloy heat treatment device and treatment method based on metal material |
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US4963091A (en) * | 1989-10-23 | 1990-10-16 | Surface Combustion, Inc. | Method and apparatus for effecting convective heat transfer in a cylindrical, industrial heat treat furnace |
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KR101658877B1 (en) | 2016-06-20 | 2016-09-23 | (주) 광암스틸 | Diffussor for Annealing Furnace |
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2017
- 2017-11-28 DE DE102017128076.6A patent/DE102017128076A1/en not_active Ceased
-
2018
- 2018-11-21 US US16/197,942 patent/US11060793B2/en active Active
- 2018-11-26 EP EP18208226.3A patent/EP3489602B1/en active Active
- 2018-11-28 CN CN201811432507.9A patent/CN109837369B/en active Active
- 2018-11-28 KR KR1020180149388A patent/KR102132799B1/en active Active
Patent Citations (3)
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US3708156A (en) * | 1971-03-31 | 1973-01-02 | Super Steel Treating Co | Heat treat furnace |
US7264467B1 (en) * | 2005-06-22 | 2007-09-04 | International Thermal Systems, Llc | Convection oven with turbo flow air nozzle to increase air flow and method of using same |
CN202709720U (en) * | 2012-07-26 | 2013-01-30 | 山西春雷铜材有限责任公司 | Copper cake placement device of bell-type furnace |
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WO2022146153A1 (en) * | 2020-12-31 | 2022-07-07 | Seco/Warwick Spółka Akcyjna | Modular device for blowing gas onto the surface of the heat-treated charge |
Also Published As
Publication number | Publication date |
---|---|
EP3489602B1 (en) | 2020-09-09 |
US20190162474A1 (en) | 2019-05-30 |
DE102017128076A1 (en) | 2019-05-29 |
BR102018074451A2 (en) | 2019-06-25 |
US11060793B2 (en) | 2021-07-13 |
CN109837369A (en) | 2019-06-04 |
KR20190062297A (en) | 2019-06-05 |
CN109837369B (en) | 2022-01-07 |
BR102018074451A8 (en) | 2023-03-07 |
KR102132799B1 (en) | 2020-07-22 |
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