Material caking prevention system for drying furnace

Abstract

The utility model relates to drying stove technical field, concretely relates to a kind of drying stove anti material agglomeration system, including drying stove body, the drying stove body outside is connected with the supporting drying stove body of supporting wheel subassembly, the drying stove body is inclinedly arranged with installation plane, the drying stove body inner wall is fixed with material lifting unit and material turning unit, drying stove body import end is provided with feed hopper, the feed hopper passes through drying stove body and extends into drying stove body, the tail of drying stove body is fixed with screening device, the screening device is externally fitted with discharging device. The utility model is inclinedly arranged by drying stove body, the material lifting plate and chain that are axially horizontally arranged in the inner wall of drying stove body, increase the duration of filter cake in drying stove, by setting chain, material can be scattered in the process of drying stove body rotation, improve material turning effect, clean the inner wall of drying stove body.

Description

Technical Field

[0001] This utility model relates to the field of drying oven technology, and in particular to a drying oven anti-caking system. Background Technology

[0002] After the aluminum ash slurry is dehydrated and solid-liquid separated on a vacuum conveyor belt, the filter cake enters the drying furnace for further drying. The dried material, in granular or powder form, is pneumatically conveyed to the storage silo. However, the filter cake entering the drying furnace has a moisture content of 30%. The material's transit time within the furnace is too short, and the large feed rate prevents it from fully completing the dehydration process within the limited time, resulting in an outlet moisture content greater than 1%, which is substandard. To meet the moisture content requirements, the current main measures are to reduce the filter cake feed rate or increase the drying furnace temperature. However, these measures significantly limit production efficiency and waste fuel energy. Simultaneously, during the rotation of the filter cake within the drying furnace, due to its inherent characteristics and the drying environment, the material easily clumps and adheres to the inner wall of the furnace. Over time, this clump accumulates, increasing the furnace's weight and shortening the wear cycle of the rollers in the support roller assembly. The clumps on the inner wall are highly hardened due to the high temperature, making them extremely difficult to clean. Shutting down for cleaning is practically impossible in actual production; it is difficult, time-consuming, and affects the continuity and stability of production. During the rotation of the filter cake inside the drying oven, a large number of irregular particles are easily formed, which cannot be used after entering the storage bin. Summary of the Invention

[0003] To address the problem of material agglomeration and adhesion to the inner wall of the drying furnace during the rotation of the filter cake, this invention provides a drying furnace anti-agglomeration system. By tilting the drying furnace body and axially and horizontally arranging the lifting and turning units on the inner wall of the drying furnace body, the time the filter cake spends in the drying furnace is increased. By setting up the turning unit, the material can be broken up during the rotation of the drying furnace body, improving the material turning effect and cleaning the inner wall of the drying furnace body.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A system for preventing material agglomeration in a drying oven includes a drying oven body. A roller assembly for supporting and assisting the rotation of the drying oven body is externally connected to the drying oven body. The drying oven body is inclined relative to the mounting plane. A lifting unit and a turning unit are fixed on the inner wall of the drying oven body. A feed hopper is provided at the inlet end of the drying oven body, and the discharge end of the feed hopper extends through the drying oven body into its interior. A screening device is fixed at the tail end of the drying oven body and is connected to the interior of the drying oven body. A discharge device is fitted externally to the screening device and is rotatably connected to the screening device.

[0006] Furthermore, the angle between the drying oven body and the mounting plane is 2°. The inclined arrangement of the drying oven body facilitates material transfer and prevents material accumulation.

[0007] Furthermore, multiple sets of axially horizontally arranged lifting units are fixed on the inner wall of the drying furnace body. Each set of lifting units includes multiple circumferentially spaced lifting plates. The axially horizontal arrangement of multiple sets of lifting plates can continuously tumble the material, lifting it from the bottom of the drying furnace to a certain height, allowing the material to fall freely under gravity, forming a good dispersion state, increasing the drying time, improving the drying effect, reducing the moisture content of the filter cake, and reducing the amount of material agglomeration.

[0008] Furthermore, multiple sets of material-turning units are fixed on the inner wall of the drying furnace body. Each set of material-turning units includes multiple chains with fixed circumferential spacing, and one set of chains is arranged between two adjacent sets of lifting plates. When the drying furnace body rotates, the chains collide and rub against the materials during rotation, which can break up clumps of materials and allow materials to move continuously from the drying furnace, preventing materials from accumulating for too long and causing them to clump. At the same time, when the chains rotate inside the drying furnace, they will have a certain amount of friction and collision with the furnace wall, which can clean the inner wall of the drying furnace body and prevent materials from adhering to the inner wall of the drying furnace body and caking, increasing the self-weight of the drying furnace body, causing the wear cycle of the rollers of the roller assembly to be shortened, and reducing the difficulty of cleaning the inner wall of the drying furnace body.

[0009] Furthermore, the screening device is a cylindrical structure formed by a screen mesh, and the screening device is fixed at the outlet of the drying furnace body and communicates with the interior of the drying furnace body; the tail end of the screening device is connected to a particle discharge pipe, the particle discharge pipe is sleeved to the outer wall of the screening device, and the lower part of the particle discharge pipe is connected to a crusher, the discharge end of the crusher is connected to the discharge device.

[0010] Furthermore, the upper part of the discharge device is an annular cavity and the lower part is a tubular structure. The upper part of the discharge device is fitted onto the outer wall of the screening device and is connected to the screening device.

[0011] Furthermore, the lower discharge end of the discharge device is connected to a sealed tank via a pipe. A Roots blower and a conveying pipe are respectively connected to both sides of the sealed tank. The Roots blower and the conveying pipe are arranged opposite to each other. The conveying pipe is connected to a storage bin. The Roots blower blows the material in the sealed tank to the storage bin through the conveying pipe.

[0012] The beneficial effects of this utility model through the above technical solution are:

[0013] This invention utilizes an inclined design for the drying furnace body to facilitate material transport and prevent material accumulation. Multiple sets of lifting plates arranged horizontally along the axis continuously agitate the material, lifting it from the bottom of the drying furnace to a certain height. This allows the material to fall freely under gravity, creating a well-dispersed state, increasing the drying time, improving the drying effect, reducing the moisture content of the filter cake, and decreasing material agglomeration.

[0014] This invention features multiple chains spaced circumferentially and axially on the inner wall of the drying furnace body between the lifting plates. As the drying furnace body rotates, the chains collide and rub against the material, breaking up any clumps and allowing the material to move continuously from the drying furnace. This prevents the material from accumulating for too long and clumping together. Simultaneously, the chains rub and collide with the furnace wall as they rotate, cleaning the inner wall of the drying furnace body and preventing material from adhering to and caking on the inner wall. This also increases the weight of the drying furnace body, shortens the wear cycle of the rollers, and reduces the difficulty of cleaning the inner wall of the drying furnace body.

[0015] This invention utilizes a screening device and a pulverizer. The screening device filters out large particles generated during the rotation of the drying oven, while the pulverizer crushes the large particles generated during the rotation of the drying oven body, ensuring that the particle size meets the requirements. This helps maintain stable performance during subsequent storage and use, and avoids stratification or other problems caused by excessive particle size differences. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a drying oven anti-caking system according to the present invention.

[0017] Figure 2 This is a cross-sectional schematic diagram of a drying oven anti-caking system according to the present invention.

[0018] Figure 3 This is a schematic diagram of the internal lifting plates and chain arrangement of a drying furnace body for an anti-caking system of a drying furnace according to this utility model.

[0019] The attached diagram is labeled as follows: 1. Feed hopper, 2. Drying furnace body, 21. Lifting plate, 22. Chain, 23. Screening device, 3. Support frame, 4. Roller assembly, 6. Particle discharge pipe, 7. Crusher, 8. Discharge device, 9. Sealed tank, 10. Roots blower, 11. Conveying pipeline, 12. Storage bin. Detailed Implementation

[0020] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings:

[0021] like Figures 1-3As shown, a material anti-caking system for a drying oven includes a drying oven body 2, which is inclined to the mounting plane. A support frame 3 is provided on the outside of the drying oven body 2 to support it. The feed end of the drying oven body 2 is higher than the discharge end of the drying oven body 2, and the included angle between the drying oven body 2 and the mounting plane is 2°. The inclined arrangement of the drying oven body 2 facilitates material transport and prevents material accumulation.

[0022] The exterior of the drying furnace body 2 is equipped with a roller assembly 4 for supporting and assisting the rotation of the drying furnace body 2. The roller assembly 4 and the driving method of the drying furnace body 2 are the existing roller assembly 4 and driving device used in rotary drum drying furnaces on the market, so they will not be described in detail here. Inside the drying furnace body 2, axially and horizontally arranged, are lifting units and turning units. Specifically, multiple sets of axially and horizontally arranged lifting units are fixed on the inner wall of the drying furnace body 2. Each set of lifting units includes multiple circumferentially spaced lifting plates 21. Multiple sets of turning units are also fixed on the inner wall of the drying furnace body 2. Each set of turning units includes multiple circumferentially spaced chains 22, with a chain 22 arranged between two adjacent sets of lifting plates 21. By axially and horizontally arranging multiple sets of lifting plates 21, the material can be continuously turned, lifting it from the bottom surface inside the drying furnace body 2 to a certain height, allowing the material to fall freely under gravity, forming a good dispersion state, increasing the drying time, improving the drying effect, reducing the moisture content of the filter cake, and reducing the amount of material agglomeration. By arranging multiple chains 22 circumferentially and axially at intervals on the inner wall of the drying furnace body 2 between the lifting plates 21, the chains 22 collide and rub against the material during the rotation of the drying furnace body 2, which can break up the clumps of material and make the material move continuously inside the drying furnace body 2, avoiding the accumulation of material for too long and causing the material to clump. At the same time, when the chains 22 rotate inside the drying furnace body 2, they will have a certain amount of friction and collision with the inner wall of the furnace, which can clean the inner wall of the drying furnace body 2, prevent the material from adhering to the inner wall of the drying furnace body 2 and caking, increasing the self-weight of the drying furnace body 2, causing the wear cycle of the roller assembly to shorten; and reducing the difficulty of cleaning the inner wall of the drying furnace body 2.

[0023] A feeding hopper 1 is provided at the inlet end of the drying furnace body 2. The feeding hopper 1 is fixed to the mounting plane by a bracket and extends through the drying furnace body 2 into its interior. A screening device 23 is fixed at the outlet end of the drying furnace body 2. The screening device 23 is a cylindrical structure formed by a screen mesh. The screening device 23 is fixed at the outlet of the drying furnace body 2 and communicates with the interior of the drying furnace body 2. A discharge device 8 is fitted around the screening device 23. The discharge device 8 is fixed to the mounting plane by a bracket and is rotatably connected to the screening device 23. Specifically, the upper part of the discharge device 8 is an annular cavity and the lower part is a tubular structure. The upper part of the discharge device 8 is fitted and fixed to the outer wall of the screening device 23 and communicates with the screening device 23.

[0024] A sealed tank 9 is located at the lower part of the discharge device 8. Material is conveyed from the screening device 23 to the sealed tank 9 through the discharge device 8. A Roots blower 10 and a conveying pipe 11 are respectively connected to both sides of the sealed tank 9. The Roots blower 10 and the conveying pipe 11 are arranged opposite to each other. The conveying pipe 11 is connected to a storage bin 12. The material in the sealed tank 9 is blown to the storage bin 12 through the conveying pipe 11 by the Roots blower 10.

[0025] To further prevent the generation of large particles during the rotation of the drying oven body 2, a particle discharge pipe 6 is connected to the tail end of the screening device 23. The particle discharge pipe 6 is fixed to the mounting plane by a bracket. The feed end of the particle discharge pipe 6 is fitted onto the outer wall of the screening device 23. A pulverizer 7 for crushing large particles is installed at the lower part of the particle discharge pipe 6. The discharge end of the pulverizer 7 is connected to the discharge device 8. The pulverizer 7 crushes the large particles generated during the rotation of the drying oven body 2, ensuring that the particle size meets the requirements. This helps maintain stable performance during subsequent storage and use, and avoids stratification or other problems caused by excessive particle size differences.

[0026] In this invention, the feed hopper 1 is connected to the drying furnace body 2, the discharge hopper 8 is connected to the drying furnace body 2, the particle discharge pipe 6 is connected to the drying furnace body 2, the particle discharge pipe 6 is connected to the crusher 7, and the discharge hopper 8 is connected to the sealing tank 9, all of which are sealed to prevent impurities or other substances from entering and affecting the material. This invention provides hot air to the drying furnace body 2 through a hot air furnace. A burner (not shown in the figure) connected to the hot air furnace is fixed at the inlet end of the drying furnace body 2. The hot air enters the interior of the drying furnace body 2 through the inlet end and exits from the outlet end of the drying furnace body 2.

[0027] During operation, the material enters the drying furnace body 2 through the feed hopper 1. As the drying furnace body 2 rotates, the material is continuously turned over by the lifting plates 21, lifting it from the bottom of the drying furnace body 2 to a certain height. This allows the material to fall freely under gravity, forming a good dispersion state, increasing the drying time, improving the drying effect, reducing the moisture content of the filter cake, and reducing the amount of material agglomeration. During rotation, the chain 22 collides and rubs against the material, breaking up any agglomerates and allowing the material to move continuously from the drying furnace, preventing material from accumulating for too long and causing agglomeration. Simultaneously, as the chain 22 rotates within the drying furnace body 2, it rubs and collides with the inner wall of the drying furnace body 2, cleaning the inner wall and preventing material from adhering and caking. This increases the weight of the drying furnace body 2, shortening the wear cycle of the rollers and reducing the difficulty of cleaning the inner wall of the drying furnace body 2. The drying oven body 2 is inclined to the mounting plane, so that during the rotation of the drying oven body 2, the material is transported to the screening device 23 under the action of gravity. The dried material enters the sealed tank 9 through the screening device 23 and the discharge device 8. Large particles filtered by the screening device 23 are transported to the crusher 7 through the particle discharge pipe 11 for crushing and then conveyed to the discharge device 8 and then into the sealed tank 9. The material in the sealed tank 9 is blown into the storage bin 12 through the conveying pipe 11 by the Roots blower 10.

[0028] The embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the patent claims of this utility model should be included within the scope of the patent application of this utility model.

Claims

1. A material caking prevention system for a drying furnace, comprising a drying furnace body (2), an external supporting wheel assembly (4) connected to the drying furnace body (2) for supporting and assisting the rotation of the drying furnace body (2), characterized in that, The drying furnace body (2) is inclined to the installation plane. A lifting unit and a turning unit are fixed on the inner wall of the drying furnace body (2). A feeding hopper (1) is provided at the inlet end of the drying furnace body (2). The discharge end of the feeding hopper (1) passes through the drying furnace body (2) and extends into the interior of the drying furnace body (2). A screening device (23) is fixed at the tail end of the drying furnace body (2). The screening device (23) is connected to the interior of the drying furnace body (2). A discharge device (8) is fitted on the outside of the screening device (23). The discharge device (8) is rotatably connected to the screening device (23).

2. The system for preventing material from caking in a drying furnace according to claim 1, wherein The angle between the drying oven body (2) and the mounting plane is 2°.

3. The system of claim 1, wherein the system further comprises a heater. The drying furnace body (2) has multiple sets of axially horizontally arranged lifting units fixed inside, and each set of lifting units includes multiple circumferentially spaced lifting plates (21).

4. The system of claim 3, wherein the system further comprises a heater. Multiple sets of material turning units are fixed on the inner wall of the drying furnace body (2). Each set of material turning units includes multiple chains (22) with fixed circumferential spacing. A set of chains (22) is arranged between two adjacent sets of lifting plates (21).

5. The anti-caking system for a drying oven of claim 1, wherein, The screening device (23) is a cylindrical structure formed by a screen. The screening device (23) is fixed at the outlet of the drying furnace body (2) and communicates with the interior of the drying furnace body (2). The tail of the screening device (23) is connected to a particle discharge pipe (6). The inlet end of the particle discharge pipe (6) is fitted to the outer wall of the screening device (23). The lower part of the particle discharge pipe (6) is connected to a crusher (7). The discharge end of the crusher (7) is connected to the discharge device (8).

6. The anti-caking system for a drying oven of claim 1, wherein, The upper part of the discharge device (8) is an annular cavity and the lower part is a tubular structure. The upper part of the discharge device (8) is fitted onto the outer wall of the screening device (23) and is connected to the screening device (23).

7. The anti-caking system for a drying oven of claim 1, wherein, The lower discharge end of the discharge device (8) is connected to a sealed tank (9) via a pipe. A Roots blower (10) and a conveying pipe (11) are connected to both sides of the sealed tank (9). The Roots blower (10) and the conveying pipe (11) are arranged opposite to each other. The conveying pipe (11) is connected to a storage bin (12). The Roots blower (10) blows the material in the sealed tank (9) to the storage bin (12) through the conveying pipe (11).

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