Material stirring device of rotary kiln
By designing an inclined first blade and grid blade structure in the rotary kiln, the problems of uneven powder mixing and equipment damage under high temperature conditions were solved, achieving uniform powder mixing and granulation.
Patent Information
- Application Number
- CN202520021206.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-06
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2035-01-06
AI Technical Summary
Existing rotary kiln mixing devices cannot achieve uniform mixing during powder granulation, and the metal transmission mechanism cannot meet the requirements in high-temperature environments.
A material stirring device for a rotary kiln is designed, which uses an inclined first blade connected to the inner wall of the cylinder, and a second blade that is a grid blade with an inclination direction opposite to the rotation direction of the cylinder, forming a spoon-like structure. The stirring function is achieved by the rotation of the cylinder itself, avoiding material spillage and meeting the requirements of high-temperature environment.
It achieves uniform mixing and granulation of powder, avoids material spillage, and does not require additional power mechanism in high-temperature environments, thus meeting mixing requirements.
Smart Images
Figure CN223623351U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of rotary kiln technology, and specifically relates to a rotary kiln material stirring device. Background Technology
[0002] A rotary kiln is a cylindrical reactor that rotates at a certain speed and is slightly inclined to the horizontal. Solid materials are continuously fed into the kiln from the higher end (kiln tail) at a given speed via a feeder, and slowly move towards the other end (kiln head) as the kiln rotates. Simultaneously, the materials undergo mixing, heating, and various chemical reactions. The processed material is continuously discharged from the kiln head and, after cooling, yields the product. The rotation of the rotary kiln cylinder is the basic method for achieving material mixing. To further enhance the mixing effect, some rotary kilns are equipped with special mixing devices inside the cylinder, such as spiral impellers or stirring blades. These mixing devices are connected to a metal power mechanism to provide the mixing power.
[0003] In the granulation process using a rotary kiln, the powder needs to be stirred. To ensure uniform shape of the granules, the material must not be thrown up excessively during stirring. Furthermore, the powder needs to be heated during granulation to temperatures of 800-1000℃, which ordinary metal transmission mechanisms cannot meet the requirements of the operating environment. Utility Model Content
[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a rotary kiln material stirring device to solve the problem that the stirring device in the rotary kiln cannot uniformly granulate the powder.
[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A rotary kiln material stirring device, comprising: a cylinder;
[0006] Several first blades are arranged at circumferential intervals along the inner wall of the cylinder, and the inclination direction is the same as the rotation direction of the cylinder.
[0007] Several second blades, the second blades being grid blades, the root of the second blades being connected to the end of the first blades, and the tilting direction of the second blades being opposite to the rotation direction of the cylinder.
[0008] Compared to existing technologies, the above technical solution has the following advantages: During the rotation of the cylinder, the first blade connects to the inner wall of the cylinder, enabling the material to be turned over and continuously renewed. The grid holes on the second blade can form a disordered material renewal process through sieving. The angle between the first blade and the cylinder is greater than the angle of repose of the powder, and the second blade is not on the same plane, forming a spoon-like structure, which can minimize material spillage during the rotation and turning process. Since the tilting direction of the first blade is the same as the rotation direction of the cylinder, that is, along the circumferential rolling direction of the material, the first blade avoids excessive obstruction of the circumferential turning of the material, thereby preventing material spillage on the first blade. At the same time, this design does not require any additional power mechanism, relying on the rotation of the cylinder itself to achieve the stirring function, and can meet the powder stirring and granulation requirements in high-temperature environments.
[0009] Furthermore, the second blade is disposed at intervals on the first blade.
[0010] Furthermore, the first blade has a radial angle of 25°-35° with the cylinder body, and the second blade has an angle of 115°-125° with the first blade.
[0011] Furthermore, the grid blades include a plurality of intersecting first and second grid bars to form an array of grid holes.
[0012] Furthermore, the first grid bar is arranged along the length direction of the first blade and includes a connecting grid bar, an intermediate grid bar, and an end grid bar. The connecting grid bar is inclined and the inclination direction is the same as that of the first blade. The connecting grid bar is fixedly connected to the end of the first blade. The intermediate grid bar is inclined and the inclination direction is opposite to that of the first blade. The end grid bar is vertically arranged at the end of the second grid bar.
[0013] By tilting the middle grid bar of the first grid bar so that the surface of the first grid bar faces the surface of the first blade on which the material is stacked, when the cylinder rotates, the material on the first blade can fully contact the surface of the first grid bar when it passes the second blade. This surface contact increases the area of impact on the material, thereby improving the granulation effect.
[0014] Furthermore, the second grid bars are inclined, and the inclination directions of adjacent second grid bars are opposite. This forms a V-shaped grid, which facilitates disordered and continuous mixing of materials during stirring and prevents material from being thrown up.
[0015] In one embodiment, the included angle of the opening formed by two adjacent second grid bars is 50-65°, which effectively prevents powder bridging.
[0016] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:
[0017] 1. The rotation of the cylinder directly drives the first blade inside to rotate, thereby achieving the function of turning the material. The rotation of the first blade can continuously renew the material layer.
[0018] 2. The first blade is set at a certain angle to prevent the material placed on the first blade from being lifted.
[0019] 3. By setting up grids and trapezoidal openings, the disordered renewal of materials can be facilitated, resulting in a better mixing effect.
[0020] 4. No additional power mechanism is required. The mixing function is achieved by the rotation of the cylinder itself, which can meet the needs of powder mixing and granulation in high-temperature environments. Attached Figure Description
[0021] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0023] Figure 2 This is a perspective view of the connection between the first blade and the second blade of this utility model.
[0024] Figure 3 for Figure 2 A schematic diagram of the longitudinal cross-sectional structure of the second blade.
[0025] Figure 4 for Figure 2 A schematic diagram of the transverse cross-sectional structure of the second blade.
[0026] Figure 5 This is a schematic diagram of a transverse cross-sectional structure of another embodiment of the second blade.
[0027] Figure label:
[0028] 1. Cylinder body; 2. First blade; 3. Second blade; 4. First grid bar; 401 Connecting grid bar; 402 Intermediate grid bar; 403 End grid bar; 5. Second grid bar; 6. Trapezoidal opening. Detailed Implementation
[0029] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.
[0030] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.
[0031] In the description of this application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, 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.
[0032] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly defined.
[0033] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., 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 according to the specific circumstances. Example
[0034] like Figure 1 As shown, the rotary kiln material stirring device provided by this utility model includes: a cylinder 1 and a plurality of first blades 2 and a plurality of second blades 3 disposed inside the cylinder 1. In this embodiment, the rotation direction of the cylinder 1 is counterclockwise. Figure 1 The middle cylinder is a cross-sectional view of a horizontally oriented cylinder.
[0035] Several first blades 2 are spaced circumferentially along the inner wall of the cylinder 1. One end of each first blade 2 is fixed to the inner wall of the cylinder 1, and the other end extends toward the center of the cylinder 1. Second blades 3 are grid blades, located on the side of the first blades 2 away from the cylinder 1 (i.e., the root of the second blade 3 is connected to the end of the first blade 2). The second blade 3 and the first blades 2 are not on the same plane. The side of the second blade 3 away from the first blades 2 is inclined in the opposite direction of rotation to the cylinder 1, that is, the distal end of the second blade 3 near the center of the cylinder 1 rotates clockwise. Figure 1As shown, the second blade 3 and the first blade 2 form a spoon-shaped structure with an obtuse angle.
[0036] During the rotation of the cylinder 1, the first blade 2 is connected to the inner wall of the cylinder 1, enabling comprehensive agitation of the material and continuous renewal of the material layer. The grid holes on the second blade 3 can create disordered renewal through sieving, further agitating the material. The angle between the first blade 2 and the cylinder 1 is greater than the angle of repose of the powder, and the second blade 3 is not on the same plane, forming a spoon-like structure, which minimizes material spillage during the rotational agitation process. The inclined setting of the second blade 3, forming a certain angle with the first blade 2, and with the inclination direction controlled opposite to the rotation direction of the cylinder 1, allows the second blade 3 to partially obstruct the material on the first blade 2, enabling more uniform sieving and mixing of the material as it passes through the grid holes on the second blade 3.
[0037] In this embodiment, one side of the first blade 2 is connected to the inner wall of the cylinder 1, and the other side is inclined in the same direction of rotation as the cylinder 1, that is, the side of the first blade 2 away from the cylinder 1 is inclined in the counterclockwise direction; the other side of the first blade 2 is uniformly set to be inclined, so that the other side is inclined in the direction of material rotation. When the cylinder 1 rotates, the material rolls circumferentially along the inclined direction of the first blade 2, avoiding the first blade 2 from obstructing the circumferential rotation of the material too much, thereby avoiding the situation of material being lifted on the first blade 2.
[0038] like Figure 1 As shown, taking the first blade 2 on the left side of the figure as an example, the right end of the first blade 2 is tilted downwards and the cylinder 1 rotates counterclockwise. At this time, the material accumulated on the first blade 2 slides down the blade surface to the first blade 2 and the second blade 3 below. At this time, the tilting direction of the first blade 2 is in the same direction as the material turning and moving, so that the material turning on the first blade 2 will not be lifted and scattered by the first blade 2. At the same time, the first blade 2 plays the role of turning the material, and the grid in the second blade 3 plays the role of randomly screening the material, so that the granulation of the material during stirring is more uniform.
[0039] Specifically, such as Figure 1 As shown, the first blade 2 forms a radial angle of 25°-35° with the cylinder body. The angle between the first blade and the cylinder body is greater than the angle of repose of the powder. This is to prevent the powder from accumulating at the connection between the first blade and the cylinder body, ensuring that the powder is smoothly agitated and does not accumulate when the cylinder body is turned over. In the figure, the radial angle between the first blade 2 and the cylinder body is 30°. The angle between the second blade and the first blade is 115°-125°. In the figure, the angle between the second blade and the first blade is 120°.
[0040] Due to limited space near the center of the cylinder 1, the second blade 3 is spaced apart from the first blade 2, such as... Figure 1 As shown in the figure, the first blade 2 has 12 blades, while the second blade 3 has 6 blades, both of which are evenly spaced in the circumferential direction.
[0041] Specifically, the grid blades include a plurality of intersecting first grid bars 4 and second grid bars 5.
[0042] The first grid bar 4 is arranged along the length direction of the first blade and includes a connecting grid bar 401, an intermediate grid bar 402 and an end grid bar 403. The connecting grid bar 401 is inclined and the inclination direction is the same as that of the first blade 2. The connecting grid bar 401 is fixedly connected to the end of the first blade 2. The intermediate grid bar 402 is inclined and the inclination direction is opposite to that of the first blade 2. The end grid bar 403 is vertically arranged at the end of the second grid bar 5.
[0043] like Figure 1-2 As shown, after the middle grid bar 402 of the first grid bar 4 is rotated and tilted, the surface of the first grid bar 4 faces the surface of the first blade 2 on which the material is stacked. When the cylinder 1 rotates, when the material on the first blade 2 slides down and passes through the second blade 3, it can fully contact the surface of the first grid bar 4. The impact area of the material is increased by the surface contact to improve the granulation effect. After the material slides down through the second blade 3, it can contact and impact the surface of the first blade 2 located behind it again, further improving the granulation effect.
[0044] Furthermore, the second grid bar 5 is inclined, and the inclination directions of adjacent second grid bars 5 are opposite. For example... Figure 2 , Figure 4 As shown, adjacent second grid bars 5 are inclined in opposite directions to form V-shaped grid openings 6. This design facilitates disordered mixing of materials and prevents material spillage. In specific implementations, the design of the second grid 5 can also have other variations, such as... Figure 5 As shown, the second grid bars 5 are inclined in one direction to form a right-angled trapezoidal opening 6.
[0045] Specifically, such as Figure 4 As shown, the included angle of the opening formed by two adjacent second grid bars 5 is 50°-65°. The angle of the inclined second grid bars 5 is controlled within a suitable range to ensure that the powder does not bridge when passing through. In the figure, the included angle of the opening formed by two adjacent second grid bars 5 is 60° to achieve the best effect.
[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.
Claims
1. A rotary kiln material mixing device, characterized in that, include: cylindrical body; Several first blades are arranged at circumferential intervals along the inner wall of the cylinder, and the inclination direction is the same as the rotation direction of the cylinder. Several second blades, the second blades being grid blades, the root of the second blades being connected to the end of the first blades, and the tilting direction of the second blades being opposite to the rotation direction of the cylinder.
2. The rotary kiln material mixing device according to claim 1, characterized in that, The second blade is spaced apart from the first blade.
3. The rotary kiln material mixing device according to claim 2, characterized in that, The first blade has a radial angle of 25°-35° with the cylinder body, and the second blade has an angle of 115°-125° with the first blade.
4. The rotary kiln material mixing device according to claim 1, characterized in that, The grid blades include a number of intersecting first and second grid bars.
5. The rotary kiln material mixing device according to claim 4, characterized in that, The first grid bar is arranged along the length direction of the first blade and includes a connecting grid bar, an intermediate grid bar and an end grid bar. The connecting grid bar is inclined and the inclination direction is the same as that of the first blade. The connecting grid bar is fixedly connected to the end of the first blade. The intermediate grid bar is inclined and the inclination direction is opposite to that of the first blade. The end grid bar is vertically arranged at the end of the second grid bar.
6. The rotary kiln material mixing device according to claim 4, characterized in that, The second grid bar is inclined, and the inclination directions of two adjacent second grid bars are opposite.
7. The rotary kiln material mixing device according to claim 6, characterized in that, The included angle between the openings formed by two adjacent second grid bars is 50°-65°.