Rotary tube furnace equipment

Abstract

The utility model belongs to the technical field of heat furnaces, and discloses rotary tube furnace equipment. The equipment comprises a furnace tube, a driving assembly, a heating piece and a stirring piece, the heating piece is used for heating the furnace tube, the axis of the furnace tube is arranged in the horizontal direction, and materials and reaction gas can be contained in the furnace tube. The driving assembly is used for driving the furnace tube to rotate around the axis of the furnace tube, and the stirring piece is arranged in the furnace tube and can stir materials in the furnace tube when the furnace tube rotates. The stirring piece is arranged in the rotatably arranged furnace tube, so that a good stirring effect on materials can be achieved, the phenomena that in the prior art, due to the fact that the materials sink to the bottom due to self weight, part of the materials are heated intensively, and part of the materials are heated insufficiently are avoided, and the materials can fully flow in the furnace tube; the phenomenon that part of materials always sink to the bottom and are blocked by the other part of materials is avoided, and the phenomena that the materials are heated unevenly and react insufficiently can be effectively relieved.

Description

Technical Field

[0001] This utility model relates to the field of tube furnace technology, and in particular to a rotary tube furnace device. Background Technology

[0002] Rotary tube furnaces are specialized equipment used to measure the temperature of materials under specific atmospheric conditions. They are widely used in industries such as powder and particle processing, chemicals, and new energy, offering advantages such as short firing cycles and low labor intensity. A rotary tube furnace consists of a furnace body, furnace tubes, and heating elements. The furnace tubes are located inside the furnace body, while the heating elements are located outside the furnace tubes and are used to heat them.

[0003] However, the following technical problems still exist in existing rotary tube furnace equipment:

[0004] 1. Uneven heating of materials, i.e., the temperature of some materials is higher than that of other materials;

[0005] 2. Insufficient material reaction, that is, some materials block other materials, resulting in the blocked materials not being able to react fully with the process gas;

[0006] 3. Uneven distribution of materials within the furnace tube, such as concentrated material distribution at one end of the furnace tube, further exacerbates uneven heating and incomplete reaction.

[0007] Therefore, there is an urgent need for a rotary tube furnace to at least solve one of the aforementioned technical problems. Utility Model Content

[0008] The purpose of this invention is to provide a rotary tube furnace that can reduce uneven heating and incomplete reaction of materials.

[0009] To achieve this objective, the present invention adopts the following technical solution:

[0010] Rotary tube furnace equipment includes:

[0011] Furnace tube, wherein the axis of the furnace tube is arranged in a horizontal direction;

[0012] A drive assembly for driving the furnace tube to rotate about the axis of the furnace tube;

[0013] A heating element, the heating element being used to heat the furnace tube;

[0014] A stirring element is disposed inside the furnace tube, and the stirring element can agitate the material located inside the furnace tube when the furnace tube rotates.

[0015] Preferably, the stirring element includes a baffle plate that protrudes from the inner wall of the furnace tube and extends along the axial direction of the furnace tube.

[0016] Preferably, the baffle is adhesively attached to the inner wall of the furnace tube and can rotate with the furnace tube.

[0017] Preferably, the furnace tube includes a concentrator and a guide section. Along the axial direction of the furnace tube, the guide section is connected to both ends of the concentrator. The inner wall of the concentrator is provided with a baffle. The baffle extends from one end of the concentrator to the other end of the concentrator, and the diameter of the guide section gradually decreases in the direction away from the concentrator.

[0018] Preferably, at least three baffles are evenly and spaced apart on the inner wall of the concentrated section around the axial direction of the furnace tube.

[0019] Preferably, the top surface of the baffle is a plane; or,

[0020] The top surface of the baffle is a wavy surface; or,

[0021] Along the direction from the center of the concentration section to the guide section, the distance between the axis of the baffle and the axis of the furnace tube gradually increases; or,

[0022] The distance between the axis of the baffle and the axis of the furnace tube gradually decreases along the direction from the center of the concentration section to the guide section.

[0023] Preferably, the rotary tube furnace further includes a mounting shaft, which passes through the furnace tube along the axial direction, and the stirring element is connected to the mounting shaft and spaced apart from the inner wall of the furnace tube.

[0024] Preferably, the stirring component includes a helical blade, which is disposed inside the furnace tube with the axis of the furnace tube as the center; the driving assembly is capable of driving the furnace tube to rotate along a first direction and a second direction, wherein the first direction and the second direction are opposite to each other.

[0025] Preferably, the rotary tube furnace further includes a furnace body, a placement cavity is formed inside the furnace body, the furnace tube is disposed in the placement cavity, and both ends of the furnace tube are located in the placement cavity. The driving assembly can drive the furnace body and the furnace tube to rotate synchronously, and the heating element is located outside the placement cavity and is disposed corresponding to the furnace tube.

[0026] Preferably, the rotary tube furnace further includes a frame, and the drive assembly includes a drive component, a transmission component, and rollers. The drive component is fixedly installed on the frame, one end of the transmission component is drivenly connected to the drive component, and the other end of the transmission component is drivenly connected to the rollers. The rollers are rotatably installed on the frame and can support the furnace body.

[0027] The beneficial effects of the rotary tube furnace equipment provided by this utility model are as follows: by setting a stirring component inside the rotating furnace tube, the material can be well stirred, avoiding the phenomenon in the prior art where the material sinks to the bottom due to its own weight, resulting in some materials being heated in a concentrated manner and others not being heated enough. It also allows the material to flow fully inside the furnace tube, avoiding the phenomenon where some materials always sink to the bottom and are blocked by other materials, and can effectively alleviate the phenomenon of uneven heating and insufficient reaction of the material. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of the rotary tube furnace equipment provided by this utility model;

[0029] Figure 2 This is a longitudinal section view of the internal structure of the furnace tube;

[0030] Figure 3 This is a cross-sectional view of the internal structure of the furnace tube.

[0031] In the picture:

[0032] 1. Furnace body; 11. Placement cavity; 12. Cavity;

[0033] 2. Furnace tube; 21. Guide section; 22. Concentration section; 23. Fixing component; 24. Stirring component;

[0034] 3. Intake pipe; 4. Exhaust pipe;

[0035] 5. Drive assembly; 51. Drive component; 52. Transmission component; 53. Roller;

[0036] 6. Sealing components;

[0037] 7. Frame. Detailed Implementation

[0038] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0039] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0040] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0041] In the description of this embodiment, the terms "upper," "lower," "right," and "left," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0042] The following is based on the appendix Figure 1 To be continued Figure 3 This invention introduces the rotary tube furnace equipment provided by this utility model.

[0043] like Figure 1 , Figure 2 As shown, in this embodiment, the rotary tube furnace includes a furnace tube 2, a drive assembly 5, a heating element, and a stirring element 24. The heating element heats the furnace tube 2, whose axis is horizontally oriented, and forms a furnace cavity within it to accommodate materials and reaction gases. The drive assembly 5 drives the furnace tube 2 to rotate around its own axis. The stirring element 24 is disposed inside the furnace tube 2 and agitates the materials within the furnace tube 2 during rotation, thereby homogenizing the materials within the furnace tube 2.

[0044] By installing a stirring element 24 inside the rotating furnace tube 2, the material can be well stirred, avoiding the phenomenon in the prior art where the material sinks to the bottom due to its own weight, resulting in concentrated heating of some materials and insufficient heating of others. It also allows the material to flow fully inside the furnace tube 2, preventing some materials from sinking to the bottom and being blocked by other materials. This effectively alleviates the problem of uneven heating and incomplete reaction of the material.

[0045] like Figure 2 , Figure 3 As shown, in this embodiment, the stirring element 24 includes a baffle plate, which protrudes from the inner wall of the furnace tube 2 and extends along the axial direction of the furnace tube 2. For ease of explanation, the accumulated material is first divided into upper and lower layers along the direction of gravity. The thickness of the lower layer material is less than the height of the baffle plate protruding from the inner wall of the furnace tube 2, while the upper layer material is stacked on top of the lower layer material. When the furnace tube 2 rotates, as the baffle plate moves from the bottom to the top of the furnace tube 2, it carries the lower layer material upwards, while the upper layer material cannot follow the baffle plate and will move past the baffle plate under the action of gravity towards the bottom of the furnace tube 2, forming a new lower layer material. Then, as the furnace tube 2 rotates, the material moving with the baffle plate will, after reaching a certain height, move past the baffle plate under the action of gravity towards the bottom of the furnace tube 2, forming a new upper layer material. In this way, the lower layer material and the upper layer material can be continuously transformed, avoiding the phenomenon of uneven heating and incomplete reaction caused by some material remaining at the bottom. Optionally, the height of the baffle should not be less than 30mm to ensure a uniform swirl effect on the material. Furthermore, for most types of materials, the height of the baffle should not exceed 80mm, otherwise the material may be pushed to both ends of the furnace tube 2, resulting in uneven distribution and heating of the material within the furnace tube 2.

[0046] Specifically, in this embodiment, the baffle is made of plate-shaped or cuboid quartz plate, which has high hardness and heat resistance. The furnace tube 2 is also made of quartz material. The quartz plate can be glued to the inner wall of the furnace tube 2 with adhesive. It protrudes from the inner wall of the furnace tube 2 and extends along the axial direction of the furnace tube 2, so as to agitate the material when it rotates with the furnace tube 2.

[0047] Optionally, in some embodiments, the baffle and furnace tube 2 can be integrally formed from quartz material, or the baffle can be installed on the inner wall of the furnace tube 2 by a snap-fit ​​connection. This invention does not limit the specific method of installing the baffle on the inner wall of the furnace tube 2; as long as the agitation effect on the material is achieved, it falls within the scope of protection of this invention.

[0048] More specifically, in this embodiment, the furnace tube 2 includes a concentrating section 22 and a guiding section 21. Along the axial direction of the furnace tube 2, the guiding section 21 connects to both ends of the concentrating section 22. A baffle is provided on the inner wall of the concentrating section 22, extending from one end to the other. The diameter of the guiding section 21 gradually decreases in the direction away from the concentrating section 22. When the material tumbles inside the furnace tube 2, the material located in the guiding section 21 flows towards the concentrating section 22 under the influence of gravity, thus concentrating the material mainly in the concentrating section 22. At this time, the inner wall of the guiding section 21 can fully contact the reacting gas, heating the reacting gas. Under the action of the baffle, the material can fully contact the heated working gas, allowing the material at all points inside the furnace tube 2 to react in the atmosphere of the reacting gas, resulting in a more complete reaction and increasing the material output rate.

[0049] like Figure 2 , Figure 3 As shown, six baffles are evenly and spaced along the axial direction of the furnace tube 2 on the inner wall of the concentration section 22, with an included angle of 60° between adjacent baffles. In some embodiments, other numbers of baffles may be provided, such as one, two, three, four, seven, eight, etc. The number of baffles is not specifically limited in this invention. Of course, it is preferable to provide no less than three and no more than ten baffles, so that the material can be evenly stirred during the rotation of the furnace tube 2, and the material will not be driven to both ends of the furnace tube 2, thereby improving the flow and distribution of the material in the furnace tube 2.

[0050] Furthermore, the shape of the baffle can be modified to suit different types of materials and their varying flow characteristics. For example, the aforementioned rectangular baffle is suitable for materials with a high specific gravity and is less prone to being lifted up.

[0051] In some embodiments, the material exhibits agglomeration characteristics. In this case, the top surface of the baffle is preferably wavy to break up the agglomerates, increasing the surface area of ​​the material and ensuring sufficient contact between the material and the reactant gas. In other embodiments, the material does not exhibit agglomeration characteristics, and the top surface can be flat, serving only a stirring function.

[0052] Furthermore, for materials that tend to accumulate in the center of the concentration section 22, a protrusion can be provided in the center of the top surface of the baffle, so that the distance between the baffle and the axis of the furnace tube 2 gradually decreases from the center of the concentration section 22 towards the guide section 21. In this way, during rotation, the baffle can push the material towards both ends of the concentration section 22, thereby reducing the accumulation of material in the center of the concentration section 22. Similarly, for materials that tend to accumulate at both ends of the concentration section 22, materials with low specific gravity, or materials with a small total amount, a recess can be provided in the center of the top surface of the baffle, so that the distance between the baffle and the axis of the furnace tube 2 gradually increases from the center of the concentration section 22 towards the guide section 21. In this way, during rotation, the baffle can push the material towards the center of the concentration section 22, thereby reducing the accumulation of material at both ends of the concentration section 22, or allowing the material to react in the concentration section 22 in a controlled manner.

[0053] Optionally, in some embodiments, the stirring element 24 includes helical blades. Unlike baffles, the helical blades are helical in shape and are arranged inside the furnace tube 2 with the axis of the furnace tube 2 as the center. The driving assembly 5 can drive the furnace tube 2 to rotate in a first direction and a second direction, which are opposite to each other. When the driving assembly 5 drives the furnace tube 2 to rotate in the first direction, the material will tumble and agitate while accumulating towards one end of the furnace tube 2. When the driving assembly 5 drives the furnace tube 2 to rotate in the second direction, the material will tumble and agitate while accumulating towards the other end of the furnace tube 2. During the heating process, the material can be agitated by alternately rotating the furnace tube 2 in the first direction and the second direction. After the reaction is completed, the furnace tube 2 can be rotated in either the first direction or the second direction, so that the material moves to the end of the furnace tube 2 with the outlet, thereby facilitating discharge.

[0054] refer to Figure 1 As shown, the rotary tube furnace also includes a mounting shaft, which passes through the furnace tube 2 along its axial direction. One end of the mounting shaft is mounted to the furnace tube via a bearing, and the other end is fitted with a drive gear connected to a drive motor. A stirring element 24 is connected to the mounting shaft and spaced apart from the inner wall of the furnace tube 2. The drive motor can drive the mounting shaft to rotate alternately along a first direction and a second direction, thereby agitating the material and ultimately discharging it. Baffles or spiral blades can also be installed inside the furnace tube 2 via the mounting shaft, also achieving agitation of the material, which falls within the scope of this invention.

[0055] Continue to refer to Figure 1As shown, in this embodiment, the rotary tube furnace also includes a furnace body 1, with a placement cavity 11 formed inside the furnace body 1. The furnace tube 2 is disposed within the placement cavity 11, with both ends of the furnace tube 2 located within the placement cavity 11. The drive assembly 5 can drive the furnace body 1 and the furnace tube 2 to rotate synchronously. The heating element is located outside the placement cavity 11 and is correspondingly disposed with respect to the furnace tube 2. During the heating process, the entire furnace tube 2 is contained within the placement cavity 11. The heating element first heats the placement cavity 11 and then heats the furnace tube 2, so that the heat generated by the heating element can be evenly transferred to all parts of the furnace tube 2 through the placement cavity 11, thereby achieving uniform heating of the furnace tube 2. This avoids the phenomenon that the temperature at both ends of the furnace tube 2 is low and the temperature in the middle is high, and avoids the inability to guarantee the heating effect of the heating element on both ends of the furnace tube 2 due to the long length of the furnace tube 2 and its extension outside the placement cavity 11. In this way, it can better guarantee the heating effect of the material located inside the furnace tube 2, and avoid the phenomenon of uneven distribution of the material in the axial direction of the furnace tube 2.

[0056] Specifically, the rotary tube furnace equipment also includes a frame 7, and a drive assembly 5 including a drive component 51, a transmission component 52, and rollers 53. The drive component 51 is fixedly installed on the frame 7, one end of the transmission component 52 is drivenly connected to the drive component 51, and the other end of the transmission component 52 is drivenly connected to the rollers 53. The rollers 53 are rotatably installed on the frame 7 and can support the furnace body 1. The drive component 51 drives the rollers 53 to rotate through the transmission component 52. While supporting the furnace body 1, the rollers drive the furnace body 1 to rotate through friction, thereby making the furnace body 1 and the furnace tube 2 rotate synchronously. Optionally, in this embodiment, the furnace tube 2 also includes a fixing component 23. The fixing component 23 is disposed between the furnace tube 2 and the inner wall of the placement cavity 11, and can fix the furnace tube 2 and the furnace body 1 to a fixed connection, so that the furnace body 1 and the furnace tube 2 rotate synchronously.

[0057] Continue to refer to Figure 1 As shown, the rotary tube furnace also includes an inlet pipe 3 and an outlet pipe 4. The inlet pipe 3 is inserted into one end of the furnace tube 2 along the axial direction of the furnace tube 2, and the outlet pipe 4 is inserted into the other end of the furnace tube 2 along the axial direction of the furnace tube 2. Through the inlet pipe 3, the reaction gas can enter the furnace tube 2; through the outlet pipe 4, the furnace tube 2 can be evacuated or vented. Preferably, the furnace body 1 also includes a cavity 12, which is detachably disposed within the furnace body 1 and located on one side of the furnace tube 2. One end of the inlet pipe 3 or the outlet pipe 4 is sealed and connected within the cavity 12 and partially located within the guide portion 21, which better guides the reaction gas into the furnace tube 2 and prevents the reaction gas from overflowing to the outside of the furnace tube 2.

[0058] Furthermore, the rotary tube furnace equipment also includes a seal 6, and the inner side of the cavity 12 has an opening for the air inlet pipe 3 or the air outlet pipe 4 to pass through. The seal 6 is welded to a port on the opening away from the furnace tube 2 to ensure the sealing between the air inlet pipe 3 or the air outlet pipe 4 and the cavity 12.

[0059] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0060] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A rotary tube furnace, characterized in that, include: Furnace tube (2), the axis of the furnace tube (2) is set in the horizontal direction, the furnace tube (2) includes a concentrator (22) and a guide (21), the guide (21) is connected to both ends of the concentrator (22) along the axis of the furnace tube (2), and the diameter of the guide (21) is gradually reduced in the direction away from the concentrator (22); A drive assembly (5) is used to drive the furnace tube (2) to rotate around the axis of the furnace tube (2); A heating element, the heating element being used to heat the furnace tube (2); A stirring element (24) is disposed inside the furnace tube (2). The material accumulated inside the furnace tube (2) is divided into upper-level material and lower-level material along the direction of gravity. The stirring element (24) includes a baffle. The inner wall of the concentration part (22) is provided with the baffle. The baffle extends from one end of the concentration part (22) to the other end of the concentration part (22). The height of the baffle protruding from the inner wall of the furnace tube (2) is greater than the thickness of the lower-level material. The height of the baffle is not less than 30 mm and not more than 80 mm. The top surface of the baffle is a flat or wavy surface. When the furnace tube (2) rotates, the stirring element (24) can only carry the lower-level material up, so that the lower-level material and the upper-level material are continuously transformed, which has a stirring effect on the material located in the furnace tube (2). Along the direction from the center of the concentration section (22) to the guide section (21), the distance between the axis of the baffle and the axis of the furnace tube (2) gradually increases; or, Along the direction from the center of the concentration section (22) to the guide section (21), the distance between the axis of the baffle and the axis of the furnace tube (2) is gradually reduced.

2. The rotary tube furnace equipment according to claim 1, characterized in that, The baffle is adhesively attached to the inner wall of the furnace tube (2) and can rotate with the furnace tube (2).

3. The rotary tube furnace equipment according to claim 1, characterized in that, Around the axial direction of the furnace tube (2), at least three baffles are evenly and spaced apart on the inner wall of the concentration part (22).

4. The rotary tube furnace equipment according to claim 1, characterized in that, The rotary tube furnace equipment also includes an installation shaft, which is inserted into the furnace tube (2) along the axial direction of the furnace tube (2). The stirring element (24) is connected to the installation shaft and is spaced apart from the inner wall of the furnace tube (2).

5. The rotary tube furnace equipment according to any one of claims 1-4, characterized in that, The rotary tube furnace equipment also includes a furnace body (1), a placement cavity (11) is formed inside the furnace body (1), the furnace tube (2) is disposed in the placement cavity (11), and both ends of the furnace tube (2) are located in the placement cavity (11). The driving component (5) can drive the furnace body (1) and the furnace tube (2) to rotate synchronously. The heating element is located outside the placement cavity (11) and is disposed corresponding to the furnace tube (2).

6. The rotary tube furnace equipment according to claim 5, characterized in that, The rotary tube furnace equipment also includes a frame (7), and the drive assembly (5) includes a drive component (51), a transmission component (52) and a roller (53). The drive component (51) is fixedly installed on the frame (7). One end of the transmission component (52) is connected to the drive component (51), and the other end of the transmission component (52) is connected to the roller (53). The roller (53) is rotatably installed on the frame (7) and can support the furnace body (1).

Images