WO2012161326A1 - 加熱炉 - Google Patents

加熱炉 Download PDF

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Publication number
WO2012161326A1
WO2012161326A1 PCT/JP2012/063530 JP2012063530W WO2012161326A1 WO 2012161326 A1 WO2012161326 A1 WO 2012161326A1 JP 2012063530 W JP2012063530 W JP 2012063530W WO 2012161326 A1 WO2012161326 A1 WO 2012161326A1
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WO
WIPO (PCT)
Prior art keywords
wall surface
furnace
heating
inclined portion
space
Prior art date
Application number
PCT/JP2012/063530
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
進二 新井
Original Assignee
株式会社新井機械製作所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社新井機械製作所 filed Critical 株式会社新井機械製作所
Priority to CN201280024619.5A priority Critical patent/CN103582795A/zh
Publication of WO2012161326A1 publication Critical patent/WO2012161326A1/ja

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Classifications

    • A—HUMAN NECESSITIES
    • A21—BAKING; EDIBLE DOUGHS
    • A21B—BAKERS' OVENS; MACHINES OR EQUIPMENT FOR BAKING
    • A21B1/00—Bakers' ovens
    • A21B1/02—Bakers' ovens characterised by the heating arrangements
    • A21B1/06—Ovens heated by radiators
    • A21B1/14—Arrangement of radiators
    • A—HUMAN NECESSITIES
    • A21—BAKING; EDIBLE DOUGHS
    • A21B—BAKERS' OVENS; MACHINES OR EQUIPMENT FOR BAKING
    • A21B1/00—Bakers' ovens
    • A21B1/42—Bakers' ovens characterised by the baking surfaces moving during the baking
    • A21B1/48—Bakers' ovens characterised by the baking surfaces moving during the baking with surfaces in the form of an endless band
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J37/00—Baking; Roasting; Grilling; Frying
    • A47J37/04—Roasting apparatus with movably-mounted food supports or with movable heating implements; Spits
    • A47J37/044—Roasting apparatus with movably-mounted food supports or with movable heating implements; Spits with conveyors moving in a horizontal or an inclined plane
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J37/00—Baking; Roasting; Grilling; Frying
    • A47J37/06—Roasters; Grills; Sandwich grills
    • A47J37/0623—Small-size cooking ovens, i.e. defining an at least partially closed cooking cavity
    • A47J37/0647—Small-size cooking ovens, i.e. defining an at least partially closed cooking cavity with gas burners
    • 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
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/06—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity heated without contact between combustion gases and charge; electrically heated
    • F27B9/068—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity heated without contact between combustion gases and charge; electrically heated heated by radiant tubes, the tube being heated by a hot medium, e.g. hot gases
    • 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
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
    • F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace
    • 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
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B9/32—Casings
    • F27B9/34—Arrangements of linings
    • 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
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B9/36—Arrangements of heating devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
    • Y02P60/80—Food processing, e.g. use of renewable energies or variable speed drives in handling, conveying or stacking

Definitions

  • a baking process is required in which the dough is heated and baked, and various types of heating furnaces are used in this baking process.
  • a heating furnace includes a batch type and a continuous type. In order to improve productivity, it is desirable to use a continuous heating furnace.
  • a tunnel-shaped heating furnace partitioned into a plurality of regions according to heating conditions is heated and baked while conveying an object to be heated by a chain conveyor or the like.
  • Many heating furnaces configured to perform the above are used (see, for example, JP-A-2005-295930).
  • the present invention aims to provide a heating furnace having a more uniform energy distribution in the furnace space and high energy efficiency.
  • the present invention includes a furnace space for heating an object to be heated, and a first inner wall surface and a second inner wall surface that are opposed to each other with the object to be heated in the furnace space interposed therebetween.
  • a third inclined portion and a fourth inclined portion on the downstream side in the transport direction, and the first inclined portion and the second inclined portion are formed from the center of the first inner wall surface.
  • the third inclination is formed so as to gradually approach the second inner wall surface as the distance from the conveying direction increases.
  • the fourth inclined portion is formed so as to gradually approach the first inner wall surface as it moves away from the center of the second inner wall surface along the transport direction, and the heating device includes the first inner wall surface. More upstream and downstream in the transport direction than the center of the first inner wall surface on the wall surface, and more upstream and downstream in the transport direction than the center of the second inner wall surface in the second inner wall surface. It is arrange
  • the heating device in the heating furnace of the above means, is configured such that the first inner wall surface has the first inner wall surface than the upstream end and the downstream end in the transport direction.
  • the second inner wall surface is disposed closer to the center of the inner wall surface of the first inner wall surface than the upstream end portion and the downstream end portion in the transport direction of the second inner wall surface. It is characterized by being arranged in the vicinity of the center.
  • the present invention is also provided on the upstream side in the transport direction, and is provided on the downstream side in the transport direction, and a carry-in entrance that is an opening for transporting the object to be heated into the furnace space. And an unloading port that is an opening for unloading the object to be heated from the furnace space.
  • the temperature distribution in the furnace space can be kept more uniform and the energy efficiency can be enhanced.
  • (A) And (b) It is the schematic which showed the example of the other cross-sectional shape in yz plane of the space in a furnace.
  • (C) It is the schematic which showed the example which inclined the heat generating surface also with respect to the z direction.
  • (A) to (c) are schematic views showing examples of usage modes of a heating furnace.
  • (A) And (b) It is the schematic which showed the example at the time of making an in-furnace space into an asymmetrical form.
  • (A) And (b) It is the schematic which showed the example at the time of arrange
  • (A) And (b) It is the schematic which showed the conventional heating furnace of the comparative example.
  • (A) And (b) It is the schematic which showed the heating furnace of the Example of this invention. It is the table
  • FIG. 1 is a schematic cross-sectional view of the heating furnace 1 according to the present embodiment as viewed from the front
  • FIG. 2 is a schematic cross-sectional view of the heating furnace 1 as viewed from the right side.
  • the horizontal direction when the heating furnace 1 is viewed from the front is the x direction
  • the vertical direction is the y direction
  • the front and rear horizontal direction is the z direction.
  • FIG. 1 is a cross-sectional view of the heating furnace 1 in the xy plane
  • FIG. 2 is a cross-sectional view of the heating furnace 1 in the yz plane.
  • the heating furnace 1 includes an upper furnace wall 10, a lower furnace wall 11, a left furnace wall 12, a right furnace wall 13, a front furnace wall 14, and a rear furnace wall 15 ( Hereinafter, they may be collectively referred to as furnace walls 10 to 15) and a heating device 20.
  • the left furnace wall 12 is provided with a carry-in port 12a which is a horizontally long and substantially rectangular opening
  • the right furnace wall 13 has a carry-out port 13a which is substantially the same shape as the carry-in port 12a. It is provided at a position facing 12a.
  • the heating furnace 1 of the present embodiment is a continuous heating furnace that heats a plurality of objects to be heated 100 while being transported in the furnace space 30 by the transport device 110. That is, the object to be heated 100 is carried into the furnace space 30 through the carry-in port 12a by the transfer device 110, heated by the heating device 20 for a predetermined time while moving in the furnace space 30, and then through the carry-out port 13a. It is to be carried outside. Therefore, in this embodiment, the conveyance direction T of the article to be heated 100 is a direction (x positive direction) that goes horizontally from the carry-in port 12a to the carry-out port 13a.
  • the furnace walls 10 to 15 have a structure in which an anti-firestone is arranged inside the outer shell composed of an angle and a plate, respectively, and the anti-firestone is prevented from falling off by arranging a presser wire mesh further inside the anti-firestone. It is configured.
  • the left furnace wall 12, the right furnace wall 13, the front furnace wall 14, and the rear furnace wall 15 are substantially flat walls erected in the vertical direction.
  • the lower furnace wall 11 has a substantially V-shaped (open U-shaped) wall in a front view extending in the front-rear horizontal direction.
  • Two heating devices 20 are arranged on the upper furnace wall 10 and the lower furnace wall 11 so as to be fitted inside the openings, respectively. Further, external covers 10 a and 11 a are appropriately provided outside the upper furnace wall 10 and the lower furnace wall 11. A heat insulating material is disposed between the outer cover 10a and the upper furnace wall 10 and between the outer cover 11a and the lower furnace wall 11 as necessary.
  • the furnace space 30 that is a space for heating the article to be heated 100 is formed by an inner wall surface 40 that combines the inner surfaces of the furnace walls 10 to 15.
  • the left and right side portions viewed from the front of the first inner wall surface 41 constituted by the upper furnace wall 10 of the inner wall surface 40 are inclined in a substantially C shape
  • the lower furnace wall 11 The left and right side portions viewed from the front of the configured second inner wall surface 42 are inclined in a substantially inverted C shape.
  • a first inclined portion 41 a that is lowered on the upstream side is provided on the upstream side in the transport direction T on the first inner wall surface 41, and the downstream side is on the downstream side in the transport direction T on the first inner wall surface 41.
  • a lowered second inclined portion 41b is provided.
  • a third inclined portion 42a whose upstream side is raised is provided on the upstream side in the transport direction T on the second inner wall surface 42, and the downstream side is raised on the downstream side in the transport direction T on the second inner wall surface 42.
  • Four inclined portions 42b are provided.
  • the temperature of the furnace space 30 is increased. It is possible to make the distribution more uniform and to increase the energy efficiency (thermal efficiency).
  • the heating device 20 is configured to include a heat generating surface 21 that generates heat for heating the article to be heated 100, and is configured from an infrared burner in the present embodiment.
  • the heating device 20 includes a plurality of substantially rectangular ceramic plates having a large number of fine holes arranged along the longitudinal direction, and a mixture of fuel gas and air is burned on the surface of the ceramic plates. It is configured. Therefore, in the present embodiment, the heat generating surface 21 is the surface of the ceramic plate, and the object to be heated 100 is heated by the heat generated by the heat generating surface 21 (mainly infrared radiation).
  • the fuel gas and air are supplied from supply sources not shown.
  • the heating device 20 is disposed on each of the first inclined portion 41a and the second inclined portion 41b of the first inner wall surface 41, and the third inclined portion 42a and the fourth inclined portion 42b of the second inner wall surface. ing. That is, the heating furnace 1 of the present embodiment includes four heating devices 20 and is configured to heat the article to be heated 100 from both above and below.
  • One heating device 20 is configured by arranging the two burners 20a and 20b in series at a predetermined interval. As described above, by disposing the two burners 20a and 20b at a predetermined interval, it is possible to prevent the central portion of the furnace space 30 from being excessively heated. That is, the temperature distribution in the furnace space 30 can be made more uniform.
  • the length of the two burners 20a and 20b and the size of the distance between them are not particularly limited, and may be set appropriately according to the size of the furnace space, the performance of the burners 20a and 20b, and the like. Good.
  • the four heating devices 20 are inclined in the xy plane so that the heat generating surface 21 faces the center side of the in-furnace space 30 with the longitudinal direction parallel to the z direction.
  • the two heating devices 20 arranged on the first inner wall surface 41 are arranged near the center side of the first inner wall 41 in the x direction and are arranged on the second inner wall surface 42. 20 are arranged near the center side of the second inner wall 42 in the x direction.
  • the conveying apparatus 110 of this embodiment conveys the several to-be-heated material 100 continuously by making the metal-mesh-like endless belt which mounted the to-be-heated material 100 drive
  • the present embodiment is not limited to this, and the transfer device 110 may be of another type such as a chain conveyor or a walking beam.
  • FIGS. 3A and 3B are schematic views showing the shape of the furnace space 30 and the arrangement of the heat generating surface 21.
  • 1A is a schematic cross-sectional view of the furnace space 30 viewed from the front
  • FIG. 1B is a schematic cross-sectional view of the furnace space 30 viewed from the right side.
  • the cross-sectional shape of the furnace space 30 in the xy plane is substantially octagonal
  • the yz plane of the furnace space 30 is formed.
  • the cross-sectional shape in is substantially rectangular. That is, the furnace space 30 is configured in a substantially octagonal prism shape.
  • a first inner wall surface 41 that is a ceiling portion of the inner wall surface 40 that forms the furnace inner space 30 has a first inclined portion 41a on the negative side in the x direction (that is, on the upstream side in the transport direction T), and is positive in the x direction.
  • the second inclined portion 41b is provided on the side (that is, the downstream side in the transport direction T).
  • the first inclined portion 41a is formed so as to be inclined by an angle ⁇ 1 parallel to the z direction and with respect to the x direction, and gradually increases as the distance from the center O1 of the first inner wall surface 41 increases in the negative x direction. It is configured to approach the inner wall surface 42.
  • the second inclined portion 41b is formed so as to be inclined by an angle ⁇ 2 parallel to the z direction and with respect to the x direction, and gradually increases from the center O1 of the first inner wall surface 41 in the x positive direction. It is comprised so that the 2 inner wall surface 42 may be approached.
  • the second inner wall surface 42 which is the bottom portion of the inner wall surface 40 forming the furnace space 30 has a third inclined portion 42a on the x direction negative side (that is, the upstream side in the transport direction T), A fourth inclined portion 42b is provided on the positive side in the x direction (that is, on the downstream side in the transport direction T).
  • the third inclined portion 42a is formed so as to be inclined by an angle ⁇ 3 parallel to the z direction and with respect to the x direction, and gradually increases as the distance from the center O2 of the second inner wall surface 42 in the negative x direction increases. It is configured to approach the inner wall surface 41.
  • the first to fourth inclined portions 41a, 41b, 42a, 42b are provided on the first inner wall surface 41 and the second inner wall surface 42 as described above.
  • the air in the furnace space 30 can be appropriately convected and circulated, so that the temperature distribution in the furnace space 30 can be made more uniform and the energy efficiency (thermal efficiency) can be improved than before.
  • the shape of the furnace space 30 is preferably symmetrical with respect to the center O of the furnace space 30. .
  • the 3rd inclination part 42a and the 2nd inclination part 42b are mutually formed symmetrically.
  • the first inner wall surface 41 and the second inner wall surface 42 are formed symmetrically with each other. That is, the inclination angles ⁇ 1 to ⁇ 4 are all the same angle.
  • ⁇ 1 to ⁇ 4 are not particularly limited, but according to various simulations and experiments performed by the inventors of the present application, in order to further improve the temperature distribution and energy efficiency of the furnace space 30.
  • ⁇ 1 to ⁇ 4 are preferably within a range of 10 to 30 °, and in the present embodiment, ⁇ 1 to ⁇ 4 are all set to 20 °.
  • the heat generating surface 21 is formed in an elongated and substantially rectangular shape, and is arranged so that the longitudinal direction is parallel to the z direction.
  • the heat generating surface 21 is outside the center O1 of the first inner wall surface 41 in the first inner wall surface 41, that is, the positive side in the x direction and the negative side in the x direction with respect to the center O1 of the first inner wall surface 41.
  • the heat generating surface 21 is outside the center O2 of the second inner wall surface 42 in the second inner wall surface 42, that is, the positive side in the x direction and the negative side in the x direction with respect to the center O2 of the second inner wall surface 42.
  • each heat-emitting surface 21 is the center of the 1st inner wall surface 41 rather than the x direction negative side edge part 41c and the x direction positive side edge part 41d of the 1st inner wall surface 41 in the x direction.
  • the heat generating surface 21 is arranged at a position close to O1, and each heat generating surface 21 in the second inner wall surface 42 is more in the x direction than the x direction negative side end portion 42c and the x direction positive side end portion 42d of the second inner wall surface 42.
  • the second inner wall surface 42 is disposed at a position close to the center O2.
  • each heat generating surface 21 is arranged in a state where the width direction is inclined at the same angle with respect to the x direction so as to face the center O side of the space in the furnace. Specifically, each heat generating surface 21 is inclined in the width direction by an angle ⁇ 5 with respect to the x direction in the xy plane, in other words, as shown in FIG. 3A, the normal direction of the heat generating surface 21 Are arranged at an angle of ⁇ 5 with respect to the y direction.
  • FIGS. 4 (a) to 4 (d) are diagrams showing an example of simulation performed by the inventor of the present application.
  • the sectional shape of the furnace space 30 in the xy plane is set to a hexagonal shape, and the inclination angles ⁇ 1 to ⁇ 4 of the first to fourth inclined portions 41a, 41b, 42a, and 42b are set to 10 °. ing.
  • the inflow of outside air from the carry-in port 12a and the outflow of furnace air from the carry-out port 13a accompanying the conveyance of the object to be heated 100 are set, and the inclination angle ⁇ 5 and the arrangement of the heating surfaces 21 of the four heating devices 20 are set.
  • the temperature distribution in the furnace space 30 when changed was calculated by the finite element method.
  • the air in the furnace space 30 can be appropriately convectively circulated.
  • a temperature gradient is generated in the vicinity of the carry-in port 12a in any of the examples shown in FIGS. ing.
  • the inventor of the present application has found that the range in which this temperature gradient occurs can be reduced by devising the inclination angle ⁇ 5 and the arrangement of the heat generating surface 21.
  • the inclination angle ⁇ 5 of the heat generating surface 21 is set to 5 °, and in this case, it reaches the center O of the furnace space 30 relatively. There is a temperature gradient over a wide range.
  • the inclination angle ⁇ 5 of the heat generating surface 21 is set to 10 °, that is, the heat generating surface 21 is parallel to the first to fourth inclined portions 41a, 41b, 42a, 42b. It is trying to become.
  • the range in which the temperature gradient occurs is smaller than in the example shown in FIG.
  • the inclination angle ⁇ 5 of the heat generating surface 21 is set to 20 °, and in this case, a range in which a temperature gradient further occurs than in the example shown in FIG. Has been reduced.
  • the inclination angle ⁇ 5 of the heat generating surface 21 is set to 10 °, and each heat generating surface 21 is separated in the x direction from the example shown in FIG. Arranged.
  • the range in which the temperature gradient is generated extends in the x direction, and the temperature gradient is generated over a wider range than the example shown in FIGS.
  • the inventor of the present application repeats the experiment by the actual machine based on the simulation result as well as the simulation by the computer, so that (1) the furnace 21 together with the first to fourth inclined portions 41a, 41b, 42a, 42b Inclining toward the center O side of the inner space 30, (2)
  • the inclination angle ⁇ 5 of the heat generating surface 21 is in the range of 10 to 30 °, more preferably 15 to 25 °, (3)
  • Each heat generating surface 21 is arranged close to each other in the x direction (conveying direction T) toward the center O side of the furnace space 30, and (4) the heating surface 21 is arranged symmetrically with respect to the center O of the furnace space 30.
  • the shape of the furnace space 30 and the arrangement of the heating surfaces 21 in the heating furnace 1 are set to the shape and arrangement described in FIG. ing.
  • the heating device 20 is disposed so as to be embedded in the upper furnace wall 10 and the lower furnace wall 11, so that the space between the heating device 20 and the first inner wall surface 41 and the second inner wall surface 42 is increased. The hot air is prevented from staying in the air and the energy efficiency is further increased.
  • the respective heat generating surfaces 21 are arranged on the first to fourth inclined portions 41a, 41b, 42a, 42b, and the inclination angle ⁇ 5 of the heat generating surface 21 and the first to fourth inclined portions 41a, 41b, 42a, 42b are arranged.
  • the inclination angles ⁇ 1 to ⁇ 4 smoother convection circulation is realized.
  • FIGS. 5A and 5B, and FIGS. 6A and 6B are schematic views illustrating examples of other cross-sectional shapes in the xy plane of the furnace internal space 30.
  • FIGS. 5A and 5B, and FIGS. 6A and 6B are schematic views illustrating examples of other cross-sectional shapes in the xy plane of the furnace internal space 30.
  • the cross-sectional shape of the furnace space 30 in the xy plane is a substantially octagonal shape.
  • the cross-sectional shape of the furnace space 30 in the xy plane is not limited to this. Any shape may be used as long as it has the fourth inclined portions 41a, 41b, 42a, and 42b.
  • the cross-sectional shape of the furnace space 30 in the xy plane may be a substantially hexagonal shape.
  • the first to fourth inclined portions 41a, 41b, 42a, 42b are each composed of regions having two different inclination angles, whereby the xy plane of the furnace space 30 is obtained.
  • the first inclined portion 41a is composed of a first region 41a1 and a second region 41a2 having different inclination angles
  • 41b is composed of a first region 41b1 and a second region 41b2 having different inclination angles
  • the third inclined portion 42a includes a first region 42a1 and a second region 42a2 having different inclination angles
  • the fourth inclined portion 42b includes the first region 42b1 and the first region 42b1 having different inclination angles. 2 regions 42b2.
  • the inclination angle of the outer second regions 41a2, 41b2, 42a2, and 42b2 is determined from the inclination angle of the first regions 41a1, 41b1, 42a1, and 42b1 on the inner side (center O1, O2 side).
  • the inclination angles of the inner first regions 41a1, 41b1, 42a1, and 42b1 may be made larger than the inclination angles of the outer second regions 41a2, 41b2, 42a2, and 42b2.
  • the first to fourth inclined portions 41a, 41b, 42a, and 42b may be formed of three or more regions having different inclination angles.
  • first to fourth inclined portions 41a, 41b, 42a, 42b are provided on the first inner wall surface 41 and the second inner wall surface 42 are not particularly limited, and the first to second The four inclined portions 41a, 41b, 42a, and 42b may be provided at any position and range.
  • the non-inclined region between the first inclined part 41a and the second inclined part 41b, and the third inclined part 42a and the fourth inclined part 42b You may make it widen the range of the area
  • the first inclined portion 41a and the second inclined portion 41b are brought close to each other, and the third inclined portion 42a and the fourth inclined portion 42b are brought close to each other to be inclined.
  • the first to fourth inclined portions 41a, 41b, 42a, and 42b may be provided between the non-existing regions.
  • FIGS. 7A and 7B are schematic diagrams showing examples of other cross-sectional shapes in the yz plane of the furnace space 30.
  • FIG. In the above-described example, an example in which the cross-sectional shape of the furnace space 30 in the yz plane is a substantially square shape is shown, but the cross-sectional shape of the furnace space 30 in the yz plane is not limited to this, and in the xy plane. Similar to the cross-sectional shape, an inclined portion inclined with respect to the z direction may be provided.
  • the first inner wall surface 41 is provided with a fifth inclined portion 41e and a sixth inclined portion 41f inclined with respect to the z direction, and the second inner wall surface 42 is provided.
  • a seventh inclined portion 42e and an eighth inclined portion 42f that are inclined with respect to the z direction may be provided.
  • the first to fourth inclined portions 41a, 41b, 42a, 42b may be inclined not only in the x direction but also in the z direction. .
  • FIG. 7C is a schematic diagram illustrating an example in which the heat generating surface 21 is inclined with respect to the z direction.
  • the heating device 20 is composed of a long burner 20a and a short burner 20b with a narrow interval, and the burners 20a and 20b are inclined with respect to the z direction, so that the heat generating surface 21 is only in the x direction. It is made to incline also with respect to z direction instead.
  • the heat generating surface 21 may be disposed so as to be inclined with respect to the z direction.
  • the distance from the heat generating surface 21 to the object to be heated 100 on the transfer device 110 in the width direction (z direction) of the transfer device 110 is reduced. Since it can adjust suitably, the heating amount of the to-be-heated object 100 mounted in the width direction both ends of the conveying apparatus 110 and the heating amount of the to-be-heated object 100 mounted in the center part are more highly accurate. Can be balanced.
  • the heat generating surface 21 may be inclined with respect to the z direction together with the inclination of the first inner wall surface 41 and the second inner wall surface 42 on which the heating device 20 is disposed.
  • the heat generating surface 21 may be inclined with respect to the z direction.
  • one heating device 20 is constituted by the burners 20a and 20b having different lengths, but two burners 20a and 20b having the same length are arranged in the z direction. Needless to say, it may be inclined, and when the interval between the two burners 20a and 20b is increased, it may be further inclined with respect to the z direction.
  • FIGS. 8A to 8C are schematic views showing examples of usage modes of the heating furnace 1.
  • the heating furnace 1 of the present embodiment is particularly suitable when the dimension in the Z direction perpendicular to the transport direction T in the horizontal plane is longer than the transport direction T of the article to be heated 100, that is, the dimension in the x direction. Accordingly, the heating furnace 1 is particularly suitable not only when used alone, but also when a plurality of furnaces 1 are used in series along the transport direction T as shown in FIG. .
  • As an example of such a use mode for example, in baking rice crackers such as rice crackers, there is a step of repeating heating and cooling while conveying the dough, and the use in such a step is particularly suitable for the heating furnace 1.
  • first inclined portion 41a and the second inclined portion 41b are formed symmetrically with each other, and the third inclined portion 42a and the fourth inclined portion 42b are formed symmetrically with each other.
  • first inner wall surface 41 and the second inner wall surface 42 are preferably formed symmetrically with each other.
  • the first inner wall surface 41 and the second inner wall surface 42 are preferably formed such that the dimension in the direction orthogonal to the transport direction T is greater than or equal to the dimension in the transport direction T. That is, the present invention is particularly suitable for a heating furnace having a relatively short dimension in the conveying direction T. Even in such a heating furnace, the temperature distribution in the furnace space 30 is made more uniform and energy efficient than ever. Can be increased.
  • the radiant heat generated by the heating device 20 is collected in a substantially central region of the furnace space 30, and an appropriate effect is obtained by the synergistic effect with the first to fourth inclined portions 41a, 41b, 42a, 42b. It becomes possible to generate convection circulation in the furnace space. Thereby, for example, even when there is an inflow of outside air from the carry-in port 12a and an outflow of furnace air from the carry-out port 13a, the temperature distribution in the furnace space 30 can be made uniform and the energy efficiency can be increased.
  • the heating device 20 is disposed on the upstream side and the downstream side in the transport direction T on the first inner wall surface 41, and is disposed on the upstream side and the downstream side in the transport direction T on the second inner wall surface 42, respectively. ing. By doing in this way, the influence of the inflow and outflow of the air from the carrying-in port 12a and the carrying-out port 13a can be reduced more effectively.
  • the heating furnace 1 is provided on the upstream side in the transport direction T, and is provided on the downstream side in the transport direction T with the carry-in port 12a that is an opening for carrying the target object 100 into the furnace space 30.
  • a carry-out port 13a which is an opening for carrying out 100 out of the furnace space 30. Since the present invention can reduce the influence of the inflow of outside air from the carry-in port 12a and the outflow of in-furnace air from the carry-out port 13a, the carry-in port 12a and the carry-out port 13a are always open in this way. In this case, it is particularly suitable.
  • the heating device 20 includes an upstream end (x direction negative end 41 c) or a downstream end (x direction positive side) of the first inner wall 41 in the transport direction T. It is arranged closer to the center O1 of the first inner wall surface 41 than the end portion 41d), and the second inner wall surface 42 has an upstream end portion (negative in the x direction) in the transport direction T of the second inner wall surface 42. It is arranged closer to the center O2 of the second inner wall surface 42 than the side end 42c) or the downstream end (x-direction positive end 42d).
  • a plurality of the heating devices 20 are arranged symmetrically with respect to the center O of the furnace space 30.
  • the inclination angle ⁇ 5 of the heat generating surface 21 with respect to the transport direction T is preferably 10 to 30 °.
  • first to fourth inclined portions 41a, 41b, 42a, and 42b are illustrated as being configured from a plane, but the present invention is not limited to this, and the first to fourth The inclined portions 41a, 41b, 42a, 42b may be formed of curved surfaces. Moreover, you may make it comprise the other part of the inner wall surface 40 from a curved surface.
  • the first inclined portion 41a and the second inclined portion 41b are formed symmetrically with each other, and the third inclined portion 42a and the fourth inclined portion 42b are formed symmetrically with each other.
  • the first inclined portion 41a and the second inclined portion 41b are formed asymmetric with each other, or the third inclined portion 42a and the fourth inclined portion are formed. You may make it form the part 42b asymmetrically.
  • the shape of the in-furnace space 30 is not necessarily symmetric with respect to the center O of the in-furnace space 30, and the first to fourth inclined portions 41a, 41b, 42a, 42b are used to form the in-furnace space. Any shape that can promote convection circulation at 30 may be used. Accordingly, the furnace space 30 may be asymmetric with respect to the center O depending on various conditions.
  • FIGS. 9A and 9B are schematic views showing an example in which the furnace space 30 is asymmetrical, and shows a cross-sectional shape of the furnace space 30 in the xy plane.
  • the first inclination as shown in FIG. The range occupied by the portion 41a and the second inclined portion 41b may be made larger than the range occupied by the third inclined portion 42a and the fourth inclined portion 42b, so as to promote the downward airflow.
  • the convection circulation may be balanced, for example, by making the inclination of the portion 41a and the third inclined portion 42a larger than the inclination of the second inclined portion 41b and the fourth inclined portion 42b.
  • the number of the heating apparatuses 20 may be other than this.
  • the heating device 20 is arranged on the first to fourth inclined portions 41a, 41b, 42a, and 42b has been shown, but the first inner wall surface 41 or the second inner wall surface 42 has the first. You may make it arrange
  • the heating device 20 is not necessarily arranged symmetrically with respect to the center O of the furnace space 30, and the radiant heat generated by the heating device 20 is collected in a substantially central region of the furnace space 30, and the first to Any arrangement that can generate an appropriate convection circulation in the furnace space by a synergistic effect with the fourth inclined portions 41a, 41b, 42a, and 42b may be used. Therefore, depending on various conditions, the heating device 20 may be arranged to be asymmetric with respect to the center O of the furnace space 30.
  • 10 (a) and 10 (b) are schematic views showing an example in which the heating device 20 is arranged asymmetrically, and shows a cross section of the furnace space 30 in the xy plane.
  • the concentration of radiant heat that affects the formation of convection circulation and the upper and lower heating power may be adjusted as appropriate. Further, as shown in FIG. 5B, the concentration of radiant heat and the upper and lower heating powers may be appropriately adjusted by making the number of heating devices 20 different between the upper side and the lower side.
  • each heating device 20 is varied by changing the position and inclination angle of each heating device 20 (each heat generating surface 21) or changing the area of the heat generating surface 21, for example.
  • the degree of concentration of radiant heat and the upper and lower heating powers may be adjusted appropriately.
  • the heating device 20 may be disposed only on the first inner wall surface 41 or only on the second inner wall surface 42.
  • the heating device 20 may be arranged only on the upstream side in the transport direction T of the first inner wall surface 41 and on the downstream side in the transport direction T of the second inner wall surface 42.
  • the present invention may be applied to a batch-type heating furnace that heats a stationary object 100 to be heated. Moreover, you may make it provide a door in the carry-in entrance 12a and the carry-out exit 13a.
  • the heating furnace of this invention is not limited to above-described embodiment, In the range which does not deviate from the summary of this invention, it can add various changes. Of course.
  • the heating furnace 1 of the above embodiment was actually manufactured, and a heating test was performed to measure the temperature distribution in the furnace space 30 and the fuel consumption.
  • a heating test was performed on the conventional heating furnace 200 used in the baking process of rice crackers such as rice crackers, and the test results were compared.
  • FIGS. 11A and 11B are schematic views showing a conventional heating furnace 200 of a comparative example
  • FIGS. 12A and 12B are schematic views showing the heating furnace 1 of the present embodiment. It is. 11 (a) and 12 (a) are schematic cross-sectional views (cross-sectional views in the zx plane) seen from above, and FIGS. 11 (b) and 12 (b) are schematic views seen from the front. It is sectional drawing (sectional drawing in xy plane).
  • the comparative heating furnace 200 is used for baking rice cracker dough. As shown in FIGS. 11A and 11B, the heating furnace 200 includes a left furnace wall 212, a right furnace wall 213, a front furnace wall 214, and a rear furnace wall 215 that are vertically arranged. These furnace walls 212 to 215 have a structure including a heat insulating material. Three heating devices 220 are disposed at the upper and lower portions of the furnace space 230 of the heating furnace 200, respectively, and a metal block plate is provided between the heating devices 220. The space 30 is formed in a substantially rectangular parallelepiped shape.
  • Each heating device 220 is composed of an infrared burner, and the heat generating surface 221 that generates heat is directed substantially vertically downward in the heating device 220 disposed in the upper portion, and directed substantially vertically upward in the heating device 220 disposed in the lower portion. It has been.
  • the rice confectionery dough which is the object to be heated, is conveyed by a wire mesh endless belt with the conveying direction T as the positive x direction, and the furnace interior space 230 is introduced from the inlet 212a provided in the left furnace wall 212. It is carried in and carried out from a carry-out port 213a provided in the right furnace wall 213.
  • the heating furnace 1 of this example was manufactured with the dimensions shown in FIGS. 12A and 12B so as to have the same dimensions as the heating furnace 200 of the comparative example. Further, the inclination angles ⁇ 1 to ⁇ 4 of the first to fourth inclined portions 41a, 41b, 42a, and 42b and the inclination angle ⁇ 5 of the heat generating surface 21 are set to 20 ° as described in the above embodiment.
  • the number (four) of the heating devices 20 included in the heating furnace 1 is smaller than the number (six) of the heating devices 220 included in the heating furnace 200, and the total area of the heat generating surface 21 is the total area of the heat generating surface 221. Is smaller than
  • FIG. 13 is a table showing the results of the heating test.
  • heating is performed for 1 hour so as to maintain the temperature of the central portion (measurement point E) of the furnace spaces 30 and 230 at about 250 ° C., and in this case, the fuel gas pressure required is measured, The fuel gas flow rate and the temperature of the upper and lower surfaces at points A to I were measured every 30 minutes.
  • the fuel gas pressure and the fuel gas flow rate required in the heating furnace 1 are both required in the heating furnace 200.
  • the fuel gas pressure and the fuel gas flow rate are lower.
  • the fuel gas flow rate required in the heating furnace 1 is about 70% of the fuel gas flow rate required in the heating furnace 200, and the heating furnace 1 has higher energy efficiency than the heating furnace 200. confirmed.
  • the heating furnace 200 has a plurality of measurement points having a temperature of 200 ° C. or lower, whereas the heating furnace 1 has almost all of the points A to I.
  • the temperature can be maintained at 230 ° C. or higher.
  • the heating furnace 1 it is possible to keep the temperatures at points A, C, G, and I, which tend to be low in the heating furnace 200, and the temperature distribution in the furnace space 30 can be changed. It was confirmed that it could be maintained in a more uniform state than 200.
  • the heating furnace of the present invention is not limited to the field of manufacturing foods such as rice crackers and baked confectionery, but also manufactures various products that require heating, such as ceramic products such as tiles, tiles, and ceramics, glass products, and metal products. It can be used in the field of

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  • Mechanical Engineering (AREA)
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  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Tunnel Furnaces (AREA)
  • Baking, Grill, Roasting (AREA)
PCT/JP2012/063530 2011-05-26 2012-05-25 加熱炉 WO2012161326A1 (ja)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105021038A (zh) * 2015-08-05 2015-11-04 上海合评消防检测中心 耐火试验炉内循环装置及其点火方式
EP3305075A1 (de) * 2016-10-04 2018-04-11 Haas Food Equipment GmbH Backofen mit modularem heizelement

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5954493B2 (ja) 2013-04-01 2016-07-20 株式会社Ihi 連続加熱炉
JP6288602B2 (ja) * 2013-12-17 2018-03-07 株式会社Ihi 輻射式加熱装置及び輻射式加熱方法
JP6446958B2 (ja) * 2014-09-30 2019-01-09 株式会社Ihi 連続加熱炉および輻射加熱器
CN107334387B (zh) * 2017-04-14 2023-08-18 宁波方太厨具有限公司 一种烤制烹饪设备

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5258715A (en) * 1975-11-08 1977-05-14 Akashi Yogyo Tunnel kiln
JPS5816897U (ja) * 1981-07-28 1983-02-02 石川島播磨重工業株式会社 熱処理炉
JP2003523497A (ja) * 2000-02-18 2003-08-05 カンタール・アクチボラグ 加熱装置及び加熱方法
WO2008156110A1 (ja) * 2007-06-20 2008-12-24 Neturen Co., Ltd. ハイブリッド型熱処理機

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6475887A (en) * 1987-09-14 1989-03-22 Daido Steel Co Ltd Roller hearth type heating furnace
JPH0645195Y2 (ja) * 1990-09-03 1994-11-16 株式会社ポータ工業 防刃用プロテクター
JP2664047B2 (ja) * 1994-12-06 1997-10-15 工業技術院長 炭素繊維強化炭素複合材料の製造方法
WO2004014139A2 (en) * 2002-07-05 2004-02-19 Global Appliance Technologies, Inc. Speed cooking oven
JP2004329107A (ja) * 2003-05-07 2004-11-25 Nichiwa Denki Kk コンベアオーブン
CN1968609A (zh) * 2004-03-05 2007-05-23 特博切夫技术有限公司 传送式炉

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5258715A (en) * 1975-11-08 1977-05-14 Akashi Yogyo Tunnel kiln
JPS5816897U (ja) * 1981-07-28 1983-02-02 石川島播磨重工業株式会社 熱処理炉
JP2003523497A (ja) * 2000-02-18 2003-08-05 カンタール・アクチボラグ 加熱装置及び加熱方法
WO2008156110A1 (ja) * 2007-06-20 2008-12-24 Neturen Co., Ltd. ハイブリッド型熱処理機

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105021038A (zh) * 2015-08-05 2015-11-04 上海合评消防检测中心 耐火试验炉内循环装置及其点火方式
EP3305075A1 (de) * 2016-10-04 2018-04-11 Haas Food Equipment GmbH Backofen mit modularem heizelement
WO2018065431A1 (de) * 2016-10-04 2018-04-12 Haas Food Equipment Gmbh Backofen mit modularem heizelement

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