rotary kiln

Abstract

This utility model belongs to the technical field of calcined products and discloses a rotary kiln, which includes a main body and multiple baffle components. The main body has a calcination chamber for carrying the product; multiple baffle components are spaced apart within the calcination chamber along the product flow direction, and are fixedly connected to the chamber wall. Each baffle component has multiple material passage holes for the product to pass through. Therefore, when used for calcination operations, this rotary kiln can effectively limit the product flow rate, ensuring that the product is fully calcined within the main body, thereby effectively evaporating and removing moisture, which helps reduce the moisture content of the product after calcination, thus ensuring that the performance of the calcined product meets requirements.

Description

Technical Field

[0001] This utility model relates to the field of calcined product technology, and in particular to rotary kilns. Background Technology

[0002] In numerous industrial production fields, such as new material preparation and chemical raw material production, rotary kilns, as an important thermal equipment, are widely used in the calcination process of products. Taking the calcination of oxide precursors as an example, the physical and chemical properties of oxide precursors undergo significant changes after calcination in a rotary kiln, thus affecting the performance and quality of the final product. In industries such as battery materials, catalysts, and ceramics, there are strict requirements for the moisture content of calcined oxide precursors. Lower moisture content helps improve the stability, activity, and subsequent processing performance of the product.

[0003] In existing technology, rotary kilns mainly consist of a cylinder, support device, transmission device, sealing device, and heating device. The cylinder is the core component of the rotary kiln, typically made of rolled steel plate and lined with refractory material to withstand high temperatures and product abrasion. The cylinder is installed at an angle and rotates slowly around its axis under the drive of the transmission device, causing the product to continuously tumble and move forward within the cylinder. The support device supports the weight of the cylinder, ensuring its stable rotation. The transmission device generally uses motors, reducers, and other equipment to provide power for the cylinder's rotation. The sealing device is located at the feed and discharge ends of the cylinder to prevent outside air from entering and internal product leakage. The heating device mostly uses burners, which generate high-temperature flames by burning fuel (such as natural gas or pulverized coal) to heat and calcine the product inside the cylinder.

[0004] In the application of the above-mentioned rotary kiln structure, the product enters from one end of the cylinder and flows out quickly from the other end as the cylinder tumbles. The overall flow rate is relatively fast, and the residence time in the cylinder is relatively short, resulting in insufficient calcination. The moisture cannot be fully evaporated and removed, resulting in a high moisture content and poor performance of the calcined product. Utility Model Content

[0005] The purpose of this invention is to provide a rotary kiln that solves the problem in the prior art where the product has a short residence time in the cylinder during the calcination process, resulting in insufficient calcination, high moisture content, and poor performance of the calcined product.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] This application provides a rotary kiln, which includes:

[0008] The main body has a calcination chamber for carrying the product;

[0009] Multiple baffle components are spaced apart in the calcination chamber along the flow direction of the product. The baffle components are fixedly connected to the chamber wall of the calcination chamber and have multiple material passage holes for the product to pass through.

[0010] Optionally, the material stop assembly includes:

[0011] A baffle plate is disposed inside the calcination chamber, and a plurality of material passage holes are formed through the baffle plate, the plurality of material passage holes being distributed at intervals along the circumference of the baffle plate.

[0012] Optionally, the baffle plate has a material passage in the middle, and the size of the material passage is larger than the size of the material passage hole.

[0013] Optionally, the baffle assembly further includes:

[0014] A baffle rod is installed inside the material passage.

[0015] Optionally, the stop bar has a pointed tip on the side facing the product.

[0016] Optionally, multiple material stop bars are provided, and the multiple material stop bars intersect each other.

[0017] Optionally, the material stop assembly further includes:

[0018] A rotating ring is rotatably connected within the material passage, and a baffle rod is fixedly installed within the rotating ring.

[0019] Optionally, the baffle rod has a slide rail, and a counterweight is slidably connected in the slide rail.

[0020] Optionally, an elastic portion is provided at one end of the slide near the rotating ring, and the counterweight can compress the elastic portion.

[0021] Optionally, the baffle assembly is detachably connected to the calcination chamber.

[0022] The beneficial effects of this utility model are:

[0023] By incorporating a baffle assembly, once the product enters the calcination chamber, it gradually flows towards the discharge end through the material passage holes on the baffle assembly. The small diameter of these holes effectively limits the product's flow rate, thereby extending its residence time within the calcination chamber. This ensures the calcination process proceeds fully and facilitates the complete evaporation and removal of moisture from the product. Therefore, when used for calcination operations, this rotary kiln effectively limits the product's flow rate, ensuring thorough calcination within the main body, effectively evaporating and removing moisture. This helps reduce the moisture content of the product after calcination, ensuring that the product's performance meets requirements. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the rotary kiln structure in an embodiment of this utility model;

[0025] Figure 2 This is a schematic diagram of the material-blocking assembly of the rotary kiln in an embodiment of this utility model;

[0026] Figure 3 This is a structural cross-sectional view of the material-blocking assembly of the rotary kiln in an embodiment of this utility model;

[0027] Figure 4 This is a cross-sectional view of the baffle rod structure of the baffle assembly of the rotary kiln in this embodiment of the present invention.

[0028] In the picture:

[0029] 1. Main body; 11. Calcination chamber; 2. Material baffle assembly; 21. Material baffle plate; 22. Material passage; 23. Material baffle rod; 231. Slide rail; 232. Counterweight block; 24. Rotary ring; 25. Elastic part; 3. Material passage hole. Detailed Implementation

[0030] 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.

[0031] 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.

[0032] 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.

[0033] In the description of this embodiment, the terms "upper," "lower," "left," and "right," 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.

[0034] This application discloses a rotary kiln.

[0035] Reference Figure 1 and Figure 2 The rotary kiln includes a main body 1 and multiple baffle assemblies 2. The main body 1 has a calcination chamber 11 for carrying products; the multiple baffle assemblies 2 are distributed at intervals in the calcination chamber 11 along the flow direction of the products, and the baffle assemblies 2 are fixedly connected to the cavity wall of the calcination chamber 11. The baffle assemblies 2 have multiple material passage holes 3 for the products to pass through the baffle assemblies 2.

[0036] Specifically, the main body 1 has a feed inlet at one end and a discharge outlet at the other end. The product is fed into the calcination chamber 11 through the feed inlet and flows towards the discharge outlet. A transmission device and a heating device (not shown in the figure) are provided on the cylinder to calcine the product. In this embodiment, the product is an oxide precursor. A baffle assembly 2 is disposed within the calcination chamber 11, and its surface has multiple through holes 3 for material passage. The baffle assembly 2 can be plate-shaped or block-shaped, and its number can be determined according to the actual size of the calcination chamber 11. In this embodiment, a baffle assembly 2 is provided near both the feed inlet and the discharge outlet of the calcination chamber 11.

[0037] By setting up the baffle assembly 2, when the product enters the calcination chamber 11, it gradually flows towards the discharge end through the material passage hole 3 on the baffle assembly 2. The small diameter of the material passage hole 3 effectively limits the flow rate of the product, thereby extending the residence time of the product in the calcination chamber 11, ensuring that the calcination process is fully carried out, and facilitating the full evaporation and removal of moisture in the product. Therefore, when this rotary kiln is used for calcination operations, it can effectively limit the flow rate of the product, ensuring that the product can be fully calcined within the main body 1, thereby effectively evaporating and removing moisture, which helps to reduce the moisture content of the product after calcination, thus ensuring that the performance of the calcined product meets the requirements.

[0038] Optionally, the baffle assembly 2 includes a baffle plate 21. The baffle plate 21 is disposed in the calcination chamber 11, and a plurality of material passage holes 3 are formed through the baffle plate 21, which are distributed at intervals along the circumference of the baffle plate 21.

[0039] Specifically, the baffle plate 21 has a plate-like structure and stands vertically inside the calcination chamber 11. The shape of the baffle plate 21 can be adapted to the shape of the calcination chamber 11. In this embodiment, the baffle plate 21 is disc-shaped. Multiple through holes 3 are formed on the surface of the baffle plate 21 as material passage holes 3. The multiple material passage holes 3 are distributed at equal angular intervals along the circumference of the baffle plate 21, or they can be distributed at non-equal angular intervals; this application does not limit this. The diameter of the material passage holes 3 can be designed according to the quantity of products. When there are many products, the diameter of the material passage holes 3 can be designed to be larger, while when the products are small, the diameter of the material passage holes 3 can be set to be smaller.

[0040] In one embodiment, the apertures of the multiple material passage holes 3 can be different, so that the flow rate of the product in different areas of the calcination chamber 11 is different, thereby further improving the retention effect of the product. The material passage holes 3 between the multiple baffle plates 21 can be staggered, that is, the material passage hole 3 on the previous baffle plate 21 will not correspond to the material passage hole 3 on the next baffle plate 21, which can also further improve the retention effect of the product. The specific distribution of the material passage holes 3 can be designed according to the actual retention effect required to meet the product, and this application does not make specific limitations.

[0041] By setting a material passage hole 3 on the baffle plate 21, on the one hand, the baffle can retain the product so that the product can only pass through the material passage hole 3 before continuing to flow. On the other hand, it can also ensure that the length of the material passage hole 3 meets the calcination requirements and avoid the problem of the product being stuck in the material passage hole 3 and not being able to be fully heated.

[0042] Optionally, the baffle plate 21 has a material passage 22 in the middle, and the size of the material passage 22 is larger than the size of the material passage hole 3.

[0043] Specifically, multiple material passage holes 3 are located at the edge of the baffle plate 21, while a through hole is also opened in the middle of the baffle plate 21 as a material passage channel 22. The material passage channel 22 is circular and its diameter is larger than that of the material passage holes 3.

[0044] By setting up the material passage 22, the connecting area on both sides of the baffle plate 21 can be increased, which is conducive to the smooth flow of a large number of products through the material passage 22. On the one hand, it reduces the possibility of product blockage, and on the other hand, it also reduces the possibility of products staying for too long.

[0045] Reference Figures 2 to 4 Optionally, the material blocking assembly 2 also includes a material blocking rod 23. The material blocking rod 23 is disposed within the material passage 22.

[0046] Specifically, the baffle rod 23 is elongated and is positioned within the material passage 22 to separate the filter passage. This allows the baffle rod 23 to further separate the product as it passes through the filter passage, thereby improving the retention effect on the product.

[0047] Optionally, the stop bar 23 has a tip on the side facing the direction of product flow.

[0048] Specifically, the baffle rod 23 is triangular prism-shaped with its tip pointing in the direction of product flow, making the side of the baffle rod 23 inclined. This serves to divert and guide the flowing product, reducing the possibility of product adhering to the baffle rod 23. At the same time, it can further increase the flow path of the product, thereby further improving the retention effect of the product.

[0049] Optionally, multiple baffles 23 are provided, and the multiple baffles 23 intersect each other.

[0050] Specifically, multiple baffles 23 can extend in different directions and intersect each other, thus dividing the material passage 22 into different areas, thereby further improving the material retention effect. In this embodiment, two baffles 23 are provided, and the two baffles 23 are perpendicular to each other. In other embodiments, three or more baffles 23 can be provided, and they can extend in different directions.

[0051] Optionally, the material stop assembly 2 also includes a rotating ring 24. The rotating ring 24 is rotatably connected within the material passage 22, and the material stop rod 23 is fixedly disposed within the rotating ring 24.

[0052] Specifically, a groove is made on the inner wall of the material passage 22, and a rotating ring 24 is embedded in the groove and rotates in connection with the groove. The inner side of the rotating ring 24 is flush with the inner side of the baffle plate 21, and both ends of the baffle rod 23 are fixedly connected to the inner side of the rotating ring 24.

[0053] By setting the rotating ring 24, when the main body 1 tumbles during the calcination process, the rotating ring 24 can drive the baffle rod 23 to rotate as well, so that the baffle rod 23 can play a stirring role on the product, and the product can be repeatedly turned over in the calcination chamber 11 to further improve the calcination effect.

[0054] Optionally, the stop bar 23 has a slide rail 231, and a counterweight 232 is slidably connected in the slide rail 231.

[0055] Specifically, the baffle rod 23 is hollow and solid in the middle. A slide rail 231 is provided at each of its two ends. A solid block structure is provided in the slide rail 231 as a counterweight 232. The material of the counterweight 232 can be metal or other materials. This application does not limit this.

[0056] By setting up the slide rail 231 and the counterweight 232, when the baffle rod 23 rotates, the counterweight 232 in the upper baffle rod 23 slides towards the middle of the baffle rod 23, while the counterweight 232 in the lower baffle rod 23 slides towards the edge. This allows the baffle rod 23 to continuously throw the counterweight 232 out through centrifugal force during rotation. As the counterweight 232 is thrown out, it further drives the baffle rod 23 to rotate, thus causing the baffle rod 23 and the main body 1 to rotate at different speeds, further improving the product flipping effect and thus improving the calcination effect.

[0057] Optionally, an elastic part 25 is provided at one end of the slide 231 near the rotating ring 24, and the counterweight 232 can compress the elastic part 25.

[0058] Specifically, the elastic part 25 can be an elastic pad, a spring, or an elastic rod, and is located on the side of the stop bar 23 near the rotating ring 24. When the counterweight 232 slides toward the rotating ring 24, the counterweight 232 will press the elastic part 25. On the one hand, this can buffer the impact generated by the counterweight 232, thereby avoiding the possibility of the counterweight 232 damaging the stop bar or the main body. On the other hand, it can also provide a certain elastic force for the counterweight 232 to reset, ensuring that the counterweight 232 can smoothly slide toward the middle of the stop bar 23 at the appropriate position.

[0059] Optionally, the baffle assembly 2 is detachably connected to the calcination chamber 11.

[0060] Specifically, the baffle assembly 2 can be detachably connected to the calcining chamber 11 via bolts or other structures, facilitating adjustment of its position within the calcining chamber 11 and allowing for easy replacement of baffle plates 21 with different sized material passage holes 3 and material passage channels 22. The baffle assembly 2 and the calcining chamber 11 can also be detachably connected via snap-fit ​​or hook-fitting methods. The specific structure can be designed according to the actual installation space and location; this application does not impose any limitations on this.

[0061] 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 kiln, characterized in that, include: The main body (1) has a calcination chamber (11) for carrying the product. Multiple baffle components (2) are spaced apart in the calcination chamber (11) along the flow direction of the product. The baffle components (2) are fixedly connected to the cavity wall of the calcination chamber (11). The baffle components (2) have multiple material passage holes (3) for the product to pass through the baffle components (2).

2. A rotary kiln according to claim 1, characterised in that The baffle assembly (2) includes: A baffle plate (21) is disposed in the calcination chamber (11). A plurality of material passage holes (3) are provided through the baffle plate (21), and the plurality of material passage holes (3) are distributed at intervals along the circumference of the baffle plate (21).

3. A rotary kiln according to claim 2, characterised in that, The baffle plate (21) has a material passage (22) in the middle, and the size of the material passage (22) is larger than the size of the material passage (3).

4. A rotary kiln according to claim 3, characterised in that The baffle assembly (2) further includes: A baffle rod (23) is installed in the material passage (22).

5. A rotary kiln according to claim 4, characterised in that, The stop bar (23) has a pointed tip on the side facing the product.

6. The rotary kiln of claim 4, wherein, Multiple baffle rods (23) are provided, and the multiple baffle rods (23) intersect each other.

7. The rotary kiln of claim 4, wherein, The baffle assembly (2) further includes: The rotating ring (24) is rotatably connected to the material passage (22), and the baffle rod (23) is fixedly installed inside the rotating ring (24).

8. A rotary kiln according to claim 7, characterised in that The baffle rod (23) has a slide (231) inside, and a counterweight (232) is slidably connected inside the slide (231).

9. A rotary kiln according to claim 8, characterised in that, The slide (231) has an elastic part (25) at one end near the rotating ring (24), and the counterweight (232) can compress the elastic part (25).

10. The rotary kiln according to any one of claims 1 to 9, characterized in that, The baffle assembly (2) is detachably connected to the calcination chamber (11).

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