Corundum tube optimized heat transfer multi-temperature-zone furnace

Abstract

The utility model discloses an alundum tube optimized heat transfer multi-temperature-zone furnace which comprises a sintering furnace, the sintering furnace comprises a lower furnace body and an upper furnace body connected with the lower furnace body in an overturning and covering mode, and a hollow hearth is arranged between the upper furnace body and the lower furnace body. The hearth comprises a plurality of furnace areas which are arranged at the opposite ends between the upper furnace body and the lower furnace body in a mirroring mode, and the temperatures of the furnace areas are independently controlled. The sintering pipe is rotatably mounted in the hearth, and the sintering pipe comprises an inner pipe and an alundum pipe. The multiple independent furnace areas are arranged in the hearth, the adjacent furnace areas are isolated through the heat insulation assemblies, accurate zoned temperature control is achieved, the sintering tube is suitable for the complex sintering process, the alundum tube is arranged outside the sintering tube, the overall heat conduction efficiency of the sintering tube is optimized, and the sintering efficiency of the sintering tube is improved. Through the synergistic effect of the blades in the inner pipe of the sintering pipe and the rotary driving assembly, materials in the sintering pipe circularly move in a temperature range, heating is more uniform, and meanwhile the heating reaction efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sintering furnace equipment, in particular to a corundum tube optimized heat transfer multi-temperature zone furnace. BACKGROUND

[0002] The sintering furnace is a commonly used equipment in heat treatment process, and is widely used in catalytic roasting, metal oxide calcination and other fields. The traditional sintering furnace usually adopts single-temperature zone design, that is, the temperature in the whole furnace is kept consistent. The single-temperature zone sintering furnace cannot meet the demand of different temperature stages in complex sintering process. The traditional single-temperature zone sintering furnace cannot realize accurate control of multiple temperature stages in the same furnace, and often needs to be sintered for multiple times, which increases the process complexity and heat treatment time cost.

[0003] Therefore, the present application provides a corundum tube optimized heat transfer multi-temperature zone furnace to solve the above problems. CONTENT OF THE UTILITY MODEL

[0004] The utility model discloses a corundum tube optimized heat transfer multi-temperature zone furnace to solve the problems in the background art.

[0005] To achieve the above object, the utility model provides the following technical scheme: a corundum tube optimized heat transfer multi-temperature zone furnace, comprising:

[0006] The sintering furnace comprises a lower furnace body and an upper furnace body reversibly connected with the lower furnace body, a hollow furnace chamber is arranged between the upper furnace body and the lower furnace body, and the furnace chamber comprises a plurality of temperature independently controlled furnace zones which are mirror image arranged at one end of the upper furnace body and the lower furnace body;

[0007] The sintering tube is rotatably installed in the furnace chamber, and comprises an inner tube and a corundum tube. Paddles spirally extending along the length direction of the inner tube are installed on the inner wall of the inner tube. The corundum tube is detachably sleeved outside the inner tube.

[0008] The rotary drive assembly comprises a driving motor and a transmission gear set. The output end of the driving motor is drivingly connected with the transmission gear set. The other end of the transmission gear set is fixedly connected with the sintering tube.

[0009] Preferably, the upper furnace body and the lower furnace body are provided with a heat insulation assembly between two adjacent furnace zones. The heat insulation assembly is detachably connected between the upper furnace body or the lower furnace body. A heat equalizing cover is further arranged between the furnace zone and the sintering tube. The heat equalizing cover is detachably connected with the furnace zone.

[0010] Preferably, a temperature control box is further installed at the bottom of the lower furnace body. The temperature control box is electrically connected with the plurality of furnace zones respectively. A control panel is arranged on the front end face of the temperature control box.

[0011] Preferably, the axial both ends of the inner tube are provided with connecting rings, a plurality of support rods are fixedly connected between the connecting rings of the two ends and arranged around the outer wall of the inner tube, the corundum tube is sleeved with the connecting rings of the two ends of the inner tube respectively, and the support rods are arranged between the inner wall of the corundum tube and the outer wall of the inner tube.

[0012] Preferably, the connecting rings at the two ends of the inner tube are connected with detachable first flanges respectively, and the first flanges at the two ends are detachably and sealingly connected with second flanges and third flanges respectively.

[0013] Preferably, the transmission gear set comprises a first gear and a second gear which are meshed with each other, the first gear is fixedly connected with the second flange, and the second gear is fixedly connected with the output end of the driving motor.

[0014] Preferably, the third flange is provided with a vacuumizing assembly, the vacuumizing assembly comprises a communication pipe, one end of the communication pipe penetrates through the end face of the third flange and communicates with the inner tube, and the end of the communication pipe away from the third flange is sequentially provided with a pressure gauge and a control valve.

[0015] Preferably, opposite ends of the upper furnace body and the lower furnace body are provided with support frames which are mirror images of each other and are rotatably connected between the sintering pipes.

[0016] Preferably, the rotating driving assembly further comprises a support, the support is sleeved and fixed on the outer periphery of the driving motor, and one end of the support is fixedly connected with the support frame on the corresponding side.

[0017] Compared with the prior art, the corundum tube optimized heat transfer multi-temperature zone furnace has the following beneficial effects:

[0018] 1. The furnace is provided with a plurality of independent furnace zones, the adjacent furnace zones are isolated by the heat insulation assemblies, precise partition temperature control is achieved, the furnace is suitable for complex sintering processes, the corundum tube is arranged outside the sintering pipe, the overall heat conduction efficiency of the sintering pipe is optimized, the paddles in the inner tube of the sintering pipe and the rotating driving assembly cooperate to make the materials in the sintering pipe move circularly between temperature zones, the materials are heated more uniformly, and the heating reaction efficiency is improved.

[0019] 2. The corundum tube is sleeved outside the inner tube, the support rods are arranged on the inner tube to increase the structural strength of the overall sintering pipe, the corundum tube is detachably connected with the inner tube, the maintenance and replacement are facilitated, and the service life of the sintering pipe is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a three-dimensional structure schematic view of the utility model;

[0021] Figure 2It is the front view structural schematic diagram of the utility model;

[0022] Figure 3 It is the three-dimensional schematic diagram of the installation structure between the temperature control box and the sintering furnace of the utility model;

[0023] Figure 4 It is the three-dimensional schematic diagram of the connecting structure between the sintering tube and the upper furnace body and the lower furnace body of the utility model;

[0024] Figure 5 It is the front view of the sintering tube structure of the utility model;

[0025] Figure 6 It is the three-dimensional exploded structural schematic diagram of the sintering tube of the utility model;

[0026] Figure 7 It is the three-dimensional structural partial section view of the sintering tube of the utility model.

[0027] In the drawing: 1, sintering furnace; 11, upper furnace body; 12, lower furnace body; 2, sintering tube; 21, connecting ring; 22, corundum tube; 23, inner tube; 24, paddle; 25, support rod; 26, first flange; 3, rotary drive assembly; 31, second flange; 32, first gear; 33, second gear; 34, drive motor; 35, support; 4, temperature control box; 41, control panel; 5, vacuumizing assembly; 51, third flange; 52, communicating pipe; 53, pressure gauge; 54, control valve; 6, hearth; 61, furnace zone; 62, heat insulation assembly; 7, heat equalizing cover; 8, support frame. DETAILED DESCRIPTION

[0028] In order to make the personnel in the technical field better understand the scheme of the present application, the technical scheme in the embodiments of the present application will be described clearly and completely in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor should belong to the scope of protection of the present application.

[0029] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0030] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0031] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0032] In addition, the term "multiple" should mean two or more.

[0033] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments. Example

[0034] like Figures 1 to 7 As shown, a multi-temperature zone furnace with optimized heat transfer using a corundum tube 22 includes:

[0035] Sintering furnace 1, the sintering furnace 1 includes a lower furnace body 12 and an upper furnace body 11 that is flipped and connected to the lower furnace body 12. A hollow furnace chamber 6 is provided between the upper furnace body 11 and the lower furnace body 12. The furnace chamber 6 includes multiple independently temperature-controlled furnace zones 61 that are mirror-image arranged at opposite ends of the upper furnace body 11 and the lower furnace body 12. This enables independent temperature control of different furnace zones 61 within the furnace chamber 6, providing a multi-temperature environment for heat treatment sintering.

[0036] A sintering tube 2 is rotatably installed in a furnace 6. The sintering tube 2 includes an inner tube 23 and a corundum tube 22. A propeller 24 extending spirally along the length of the inner tube 23 is installed on the inner wall of the inner tube 23. The corundum tube 22 is detachably fitted outside the inner tube 23. The sintering tube 2 is composed of an inner tube 23 and a corundum tube 22. The inner tube 23 is used to load the material to be heated. The corundum tube 22 is detachably fitted outside the inner tube 23 to withstand the high temperature of the furnace 6. The sintering tube 2 is rotatable, which allows the material in the inner tube 23 to be rotated and turned, thereby improving the heating efficiency. The propeller 24 on the inner wall of the inner tube 23 can push the material in the inner tube 23 to move when the sintering tube 2 rotates, so that the material moves between multiple temperature zones during the sintering process, allowing the material to be heated sequentially and the reaction to be more complete.

[0037] Specifically, the thermal conductivity of the corundum tube 22 is approximately 28-30 W / (m·K) at 20℃, maintaining high thermal conductivity even at high temperatures, which is significantly better than that of ordinary ceramic materials. The high thermal conductivity of the corundum tube 22 allows heat from the furnace 6 to be quickly transferred to the inner tube 23 through the corundum tube 22, reducing thermal resistance loss and improving heating efficiency. At the same time, the thermal conductivity of corundum increases with temperature, and combined with its independent temperature control characteristics in multiple furnace zones 61, the corundum tubes 22 in different furnace zones 61 have different thermal conductivity, thereby making the internal temperature of the sintering tube 2 similar to the temperature of the corresponding furnace zone 61. This allows the material to circulate and move between multiple furnace zones 61 through the rotation of the paddle 24, achieving dynamic heating.

[0038] The rotary drive assembly 3 includes a drive motor 34 and a transmission gear set. The output end of the drive motor 34 is driven and connected to the transmission gear set. The other end of the transmission gear set is fixedly connected to the sintering tube 2. The power output by the drive motor 34 is transmitted through the gear set, causing the sintering tube 2 to rotate at a constant speed in the furnace 6.

[0039] In this embodiment, a heat insulation component 62 is provided between the upper furnace body 11 and the lower furnace body 12 located between two adjacent furnace zones 61. The heat insulation component 62 is detachably connected to the upper furnace body 11 or the lower furnace body 12. A heat spreader 7 is also provided between the furnace zone 61 and the sintering tube 2. The heat spreader 7 is detachably connected to the furnace zone 61. In use, the heat insulation component 62 is installed between adjacent furnace zones 61 to prevent heat loss and transfer between adjacent furnace zones 61, avoid heat crosstalk, and ensure temperature zone independence. The heat spreader 7 is installed between the furnace zone 61 and the sintering tube 2 to evenly distribute the heat generated by heating the furnace zone 61, so that the sintering tube 2 is heated evenly in the corresponding furnace zone 61.

[0040] In this embodiment, a temperature control box 4 is also installed at the bottom of the lower furnace body 12. The temperature control box 4 is electrically connected to multiple furnace zones 61 respectively. A control panel 41 is provided on the front surface of the temperature control box 4. The temperature of each furnace zone 61 can be precisely controlled through the control panel 41 to meet the heating requirements of various sintering processes.

[0041] In this embodiment, connecting rings 21 are installed at both axial ends of the inner tube 23, and multiple support rods 25 are fixedly connected between the two connecting rings 21 and arranged around the outer wall of the inner tube 23. The two axial ends of the corundum tube 22 are respectively sleeved with the connecting rings 21 at both ends of the inner tube 23. The support rods 25 are arranged between the inner wall of the corundum tube 22 and the outer wall of the inner tube 23. In use, the support rods 25 are used to support the two ends of the inner tube 23, so as to prevent the inner tube 23 from deforming and collapsing due to heat, which would cause a gap between the corundum tube 22 and the inner tube 23, or cause the corundum tube 22 to break due to the deformation and expansion of the inner tube 23.

[0042] In this embodiment, a detachable first flange 26 is connected to the connecting ring 21 at both ends of the inner tube 23. The first flange 26 at both ends is detachably and sealingly connected to a second flange 31 and a third flange 51, respectively. In use, the two ends of the sintered tube 2 are connected to the second flange 31 and the third flange 51 through the first flange 26, respectively, for sealing the sintered tube 2.

[0043] In an embodiment, the transmission gear set includes a first gear 32 and a second gear 33 that mesh with each other. The first gear 32 is fixedly connected to the second flange 31, and the second gear 33 is fixedly connected to the output end of the drive motor 34, for driving the sintering tube 2 to rotate at a constant speed in the furnace 6 through the drive motor 34.

[0044] In this embodiment, a vacuum assembly 5 is installed on the third flange 51. The vacuum assembly 5 includes a connecting pipe 52. One end of the connecting pipe 52 passes through the end face of the third flange 51 and is connected to the inner pipe 23. A pressure gauge 53 and a control valve 54 are sequentially installed on the end of the connecting pipe 52 away from the third flange 51. The vacuum assembly 5 is connected to the inner pipe 23 through the connecting pipe 52. The pressure is monitored by the pressure gauge 53, and the control valve 54 controls the opening and closing of the connecting pipe 52, thereby adjusting the vacuum degree of the sintering tube 2 and providing a controllable vacuum environment for the heating and sintering of materials. The atmosphere required for the heat treatment of materials can be introduced into the inner pipe 23 of the sintering tube 2 through the connecting pipe 52, thereby promoting the reaction of materials.

[0045] In this embodiment, the upper furnace body 11 and the lower furnace body 12 are provided with mirror-image support frames 8 on both sides of their opposite ends. The support frames 8 on both sides are rotatably connected to the sintering tube 2, providing stable support for the two ends of the sintering tube 2 extending out of the sintering furnace 1, and ensuring that the sintering tube 2 remains balanced when rotating.

[0046] In this embodiment, the rotary drive assembly 3 further includes a bracket 35, which is fitted and fixed on the outer periphery of the drive motor 34. One end of the bracket 35 is fixedly connected to the support frame 8 on the corresponding side. The bracket 35 is used to fix the drive motor 34 so that the drive motor 34 can output driving force stably.

[0047] The specific working principle of this utility model is as follows: The sintering furnace 1 is divided into an upper furnace body 11 and a lower furnace body 12. A hollow furnace chamber 6 is located between the upper furnace body 11 and the lower furnace body 12. Multiple furnace zones 61 are mirrored at the upper and lower ends of the furnace chamber 6 and are respectively distributed on the upper furnace body 11 and the lower furnace body 12. The temperature of each furnace zone 61 is individually controlled by a temperature control box 4. The sintering tube 2 is set in the furnace chamber 6. The sintering tube 2 consists of an inner tube 23 and a corundum tube 22. The inner tube 23 is used to load materials. The inner wall of the inner tube 23 is provided with spiral blades 24, which are used to push the materials in the inner tube 23 to reciprocate in multiple temperature zones when the sintering tube 2 rotates, so as to achieve sequential heating and allow the materials to react fully. The corundum tube 22 is detachably fitted onto the outside of the inner tube 23. The corundum tube 22 is resistant to high temperature and has high thermal conductivity, which is used to ensure that the inner tube 23 is heated evenly. The two ends of the inner tube 23 are fixed by a support rod 25 to prevent thermal deformation from causing structural damage. The two ends of the sintering tube 2 are respectively connected to the second flange 31 and the third flange 51 through the first flange 26. A vacuum assembly 5 is installed at one end of the third flange 51, which can adjust the vacuum degree and introduce the atmosphere required for the reaction. A transmission gear set is provided at one end of the second flange 31 and connected to the drive motor 34. The drive motor 34 outputs power to drive the sintering tube 2 to rotate at a constant speed around the furnace 6 during the heating process.

[0048] The above-described specific embodiments are merely preferred embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above-described specific embodiments.

Claims

1. A multi-temperature zone furnace with optimized heat transfer using corundum tubes, characterized in that, include: Sintering furnace (1), the sintering furnace (1) includes a lower furnace body (12) and an upper furnace body (11) connected to the lower furnace body (12) by flipping and closing. A hollow furnace chamber (6) is provided between the upper furnace body (11) and the lower furnace body (12). The furnace chamber (6) includes multiple independently temperature-controlled furnace zones (61) mirror-image arranged at opposite ends of the upper furnace body (11) and the lower furnace body (12). Sintering tube (2), the sintering tube (2) is rotatably installed in the furnace (6), the sintering tube (2) includes an inner tube (23) and a corundum tube (22), the inner wall of the inner tube (23) is equipped with a blade (24) that extends spirally along the length of the inner tube (23), and the corundum tube (22) is detachably fitted outside the inner tube (23); The rotary drive assembly (3) includes a drive motor (34) and a transmission gear set. The output end of the drive motor (34) is driven and connected to the transmission gear set, and the other end of the transmission gear set is fixedly connected to the sintering tube (2).

2. The multi-temperature zone furnace with optimized heat transfer via corundum tubes according to claim 1, characterized in that: The upper furnace body (11) and the lower furnace body (12) are provided with heat insulation components (62) between two adjacent furnace zones (61). The heat insulation components (62) are detachably connected to the upper furnace body (11) or the lower furnace body (12). A heat homogenizing cover (7) is also provided between the furnace zone (61) and the sintering tube (2). The heat homogenizing cover (7) is detachably connected to the furnace zone (61).

3. The multi-temperature zone furnace with optimized heat transfer via corundum tubes according to claim 2, characterized in that: A temperature control box (4) is also installed at the bottom of the lower furnace body (12). The temperature control box (4) is electrically connected to multiple furnace zones (61) respectively. A control panel (41) is provided on the front surface of the temperature control box (4).

4. The multi-temperature zone furnace with optimized heat transfer via corundum tubes according to claim 1, characterized in that: The inner tube (23) is equipped with connecting rings (21) at both axial ends. Multiple support rods (25) are fixedly connected between the two connecting rings (21) and surrounding the outer wall of the inner tube (23). The two axial ends of the corundum tube (22) are respectively sleeved with the connecting rings (21) at both ends of the inner tube (23). The support rods (25) are arranged between the inner wall of the corundum tube (22) and the outer wall of the inner tube (23).

5. The multi-temperature zone furnace with optimized heat transfer via corundum tubes according to claim 4, characterized in that: The inner tube (23) has a detachable first flange (26) connected to the connecting ring (21) at both ends. The first flange (26) at both ends is detachably and sealed to a second flange (31) and a third flange (51).

6. The multi-temperature zone furnace with optimized heat transfer via corundum tubes according to claim 5, characterized in that: The transmission gear set includes a first gear (32) and a second gear (33) that mesh with each other. The first gear (32) is fixedly connected to the second flange (31), and the second gear (33) is fixedly connected to the output end of the drive motor (34).

7. A multi-temperature zone furnace with optimized heat transfer via corundum tubes according to claim 5, characterized in that: A vacuum assembly (5) is installed on the third flange (51). The vacuum assembly (5) includes a connecting pipe (52). One end of the connecting pipe (52) passes through the end face of the third flange (51) and is connected to the inner pipe (23). A pressure gauge (53) and a control valve (54) are installed in sequence at the end of the connecting pipe (52) away from the third flange (51).

8. A multi-temperature zone furnace with optimized heat transfer via corundum tubes according to claim 1 or 6, characterized in that: The upper furnace body (11) and the lower furnace body (12) are provided with mirror-image support frames (8) on both sides of their opposite ends, and the support frames (8) on both sides are rotatably connected to the sintering tube (2).

9. A multi-temperature zone furnace with optimized heat transfer via corundum tubes according to claim 8, characterized in that: The rotary drive assembly (3) also includes a bracket (35), which is fixedly mounted on the outer periphery of the drive motor (34). One end of the bracket (35) is fixedly connected to the support frame (8) on the corresponding side.

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