Feeding and slag screening device for high-temperature and normal-pressure slurry tank
By designing a high-temperature, atmospheric-pressure slurry feeding and screening device in alumina production, the problems of pipeline blockage and equipment damage caused by impurities during lime slurry transportation were solved, achieving effective screening and filtration, and improving production efficiency and equipment stability.
Patent Information
- Application Number
- CN202421935344.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-12
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2034-08-12
AI Technical Summary
In the alumina production process, impurities during lime slurry transportation can cause pipe blockages and equipment damage, increasing cleaning and maintenance costs and potentially polluting the environment.
A high-temperature atmospheric pressure slurry feeding and slag screening device is designed, including a box body, a screen structure and a support frame. The screen structure is connected to the box body through a bearing rotation structure, which can effectively screen and filter impurities during lime slurry transportation, reducing slag from entering the production system.
It effectively avoids pipe blockage and equipment damage, improves production efficiency, reduces equipment wear and replacement cycles, and reduces the risk of environmental pollution.
Smart Images
Figure CN223788178U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of alumina production equipment, and in particular to a high-temperature atmospheric pressure slurry feeding and slag screening device. Background Technology
[0002] In the alumina production process, a large amount of lime slurry must be added for lime activation and side-flow causticization. However, during the preparation and transportation of lime slurry, due to natural wear and tear of equipment and routine cleaning, some lime residue and other impurities inevitably enter the lime slurry tank. Given the unique viscosity and tendency of lime slurry to form scale, these impurities often cause blockages in the conveying pipelines, and may even cause the conveying equipment to jam or be damaged. This not only increases the cost of cleaning and maintenance, but may also pollute the surrounding environment, and in severe cases, adversely affect production stability. Utility Model Content
[0003] To address the existing technical problems, the purpose of this utility model is to provide a high-temperature atmospheric pressure slurry tank feeding and slag screening device to solve the above problems. It can achieve effective screening and filtration, thereby reducing slag entering the production system, avoiding pipeline blockage and equipment damage, and improving production efficiency.
[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution:
[0005] A high-temperature atmospheric pressure slurry feeding and screening device is provided. The screening device is installed at the top of the lime slurry conveying pipeline. The screening device includes a box body, a screen structure, and a support frame. The screen structure is located inside the box body. The support frame is connected to the bottom of the box body, forming an open area between the support frame and the box body. The screen structure is located between the support frame and the box body, and the middle part of the support frame is connected to the screen structure through a bearing rotation structure, so that the screen structure can rotate relative to the box body.
[0006] Preferably, the upper half of the screen structure is located inside the box, and the lower half of the screen structure is located inside the support frame.
[0007] Preferably, the screen structure includes a screen body, a bottom support, and several side supports. The bottom support is a cross shape, and the several side supports are correspondingly and vertically arranged at the four ends of the bottom support. The screen body is connected to the side supports and the bottom support.
[0008] Preferably, the screen structure has several sets of inclined baffles inside, the inclined baffles are vertically arranged in the screen structure, and the length direction of the inclined baffles is parallel to the height direction of the screen structure, and the surface of the inclined baffles has an angle of less than 90° with the radius direction of the screen structure.
[0009] Preferably, the side of the inclined baffle is connected to the side of the screen structure.
[0010] Preferably, the bottom of the support frame has a cross structure.
[0011] Preferably, the bearing rotation structure adopts a snap-fit rotating bearing.
[0012] Preferably, the top of the box is provided with a box cover.
[0013] Preferably, the housing is a cylindrical pipe with an inner diameter of 600 mm and a length of 1200 mm.
[0014] Preferably, the screen body is a cylindrical bucket-shaped screen with a diameter of 590 mm and a length of 800 mm.
[0015] In summary, this utility model has the following beneficial effects:
[0016] 1. The slag screening device is connected to the lime slurry inlet pipe from one side of the upper part of the tank. After the lime slurry is screened by the screen structure, qualified material is discharged from the lower side and bottom of the screen structure, while slag remains inside the screen structure, thus achieving effective screening and filtration. Installing the slag screening device at the point where the lime slurry conveying pipeline reaches the top of the tank can reduce slag entering the production system and avoid pipeline blockage and equipment damage. The bearing rotation device allows for flexible rotation of the screen structure.
[0017] 2. The tight snap-fit structure combined with the cylindrical water tank structure avoids the problem of difficult screen replacement in conventional filters.
[0018] 3. The inclined baffle's function is to automatically rotate the screen body under the impact of materials, thereby increasing the contact area between the material and the screen, reducing screen wear, and shortening the replacement cycle. The screen structure and the housing are tightly connected by a cross-shaped bearing snap-fit, ensuring smooth rotation of the screen body within the housing and improving the stability of equipment operation.
[0019] 4. The top of the enclosure is equipped with a round cover for easy operation and maintenance. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the slag screening device of this utility model;
[0021] Figure 2 This is a schematic diagram of the structure of the box body of this utility model;
[0022] Figure 3 Top view of the support frame of this utility model;
[0023] Figure 4 This is a schematic diagram of the sieve structure of this utility model;
[0024] Figure 5 This is a top view of the screen structure of this utility model.
[0025] Attached reference numerals: 1. Box body; 11. Hollowed-out area;
[0026] 2. Screen structure; 21. Screen body; 22. Bottom support; 23. Side support; 3. Support frame; 31. Cross structure; 32. Upright pole; 4. Bearing rotation structure; 5. Inclined baffle. Detailed Implementation
[0027] The present invention will be further described in detail below with reference to the accompanying drawings.
[0028] See Figures 1-5 A typical embodiment of this application provides a high-temperature, atmospheric-pressure slurry tank feeding screening device. The screening device is mainly installed on the top of the lime slurry tank, and its top is used to connect to the lime slurry conveying pipeline. The screening device includes a box body 1, a screen structure 2, and a support frame 3. The screen structure 2 is located inside the box body 1, and the support frame 3 is connected to the bottom of the box body 1. The screen structure 2 is located between the support frame 3 and the box body 1. Specifically, the box body 1 adopts a cylindrical pipe with an inner diameter of 600 mm and a length of 1200 mm. The top of the box body 1 is closed, the bottom of the box body 1 has an opening, and the upper side wall of the box body 1 has a pipe opening for connecting to the lime slurry inlet pipeline.
[0029] The bottom of the support frame 3 is a cross structure 31, with four sets of uprights 32 vertically connected to the four ends of the cross. The tops of the uprights 32 are connected to the bottom of the box body 1, creating a hollow area between the support frame 3 and the box body 1. This hollow area, combined with the screen structure 2, is used to screen for residue in lime slurry. The screened material is discharged from the screen structure 2 and the hollow area, then falls into the lime slurry trough below the slag screening device. The middle of the support frame 3 is connected to the screen structure 2 via a bearing rotation structure 4, allowing the screen structure 2 to rotate relative to the box body 1. The bearing rotation structure 4 uses a snap-fit rotating bearing, enabling flexible rotation of the screen structure 2.
[0030] The upper half of the screen structure 2 is located inside the housing 1, and the lower half is located inside the support frame 3. Specifically, the screen structure 2 includes a screen body 21, a bottom support 22, and several side supports 23. The bottom support 22 is a cross shape, and the side supports 23 are correspondingly and vertically arranged at the four ends of the bottom support 22. The screen body 21 is connected to the side supports 23 and the bottom support 22.
[0031] The screen structure 2 and the box 1 are tightly connected by a cross-shaped bearing snap-fit, which can ensure that the screen body 21 can rotate smoothly inside the box 1 and improve the stability of the equipment operation.
[0032] In a preferred embodiment, the screen structure 2 is provided with a plurality of inclined baffles 5. The inclined baffles 5 are rectangular plates and are vertically arranged in the screen structure 2. The side of the inclined baffles 5 is connected to the side of the screen structure 2. The length direction of the inclined baffles 5 is parallel to the height direction of the screen structure 2. The plate surface of the inclined baffles 5 has an angle of less than 90° with the radius direction of the screen structure 2. In this embodiment, the angle is set to 45°.
[0033] The function of the inclined baffle 5 is to make the screen body 21 rotate automatically under the impact of the material, so as to increase the contact area between the material and the screen body 21, reduce the wear of the screen, and shorten the replacement cycle.
[0034] In a preferred embodiment, the top of the enclosed structure of the housing 1 can be configured as a flip-top structure. Specifically, the top of the housing 1 has an opening, and a cover is provided on the housing 1 above the opening. The top of the housing 1 is equipped with a circular cover for easy operation and maintenance.
[0035] Overall, the slag screening device is connected to the lime slurry inlet pipe from one side of the upper part of the box 1. After the lime slurry is screened by the screen structure 2, the qualified material is discharged from the lower side and bottom of the screen structure 2 and falls into the lime slurry tank, while the filtered slag remains inside the screen structure 2, thereby achieving effective screening and filtration.
[0036] Installing a slag screening device at the top of the lime slurry conveying pipeline reduces slag entering the production system, preventing pipeline blockage and equipment damage. The tight-fitting snap-fit structure combined with the cylindrical tank structure avoids the difficulties of replacing conventional filter screens.
[0037] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.
Claims
1. A high-temperature atmospheric pressure slurry tank feeding and slag screening device, characterized in that, The slag screening device is installed at the top of the lime slurry conveying pipeline. The slag screening device includes a box body, a screen structure, and a support frame. The screen structure is located inside the box body, and the support frame is connected to the bottom of the box body, forming a hollow area between the support frame and the box body. The screen structure is located between the support frame and the box body, and the middle part of the support frame is connected to the screen structure through a bearing rotation structure, so that the screen structure can rotate relative to the box body.
2. The high-temperature atmospheric pressure slurry tank feeding and slag screening device according to claim 1, characterized in that, The upper half of the screen structure is located inside the box, and the lower half of the screen structure is located inside the support frame.
3. The high-temperature atmospheric pressure slurry tank feeding and slag screening device according to claim 2, characterized in that, The screen structure includes a screen body, a bottom support, and several side supports. The bottom support is a cross shape, and the several side supports are correspondingly and vertically arranged at the four ends of the bottom support. The screen body is connected to the side supports and the bottom support.
4. The high-temperature atmospheric pressure slurry tank feeding and slag screening device according to claim 1, characterized in that, The bottom of the support frame has a cross structure.
5. The high-temperature atmospheric pressure slurry tank feeding and slag screening device according to claim 1, characterized in that, The bearing rotation structure adopts a snap-fit rotating bearing.
6. The high-temperature atmospheric pressure slurry tank feeding and slag screening device according to claim 1, characterized in that, The top of the box is equipped with a lid.
7. The high-temperature atmospheric pressure slurry tank feeding and slag screening device according to claim 1, characterized in that, The box body is made of a cylindrical pipe with an inner diameter of 600mm and a length of 1200mm.
8. A high-temperature atmospheric pressure slurry tank feeding and slag screening device according to claim 3, characterized in that, The screen body is a cylindrical bucket-shaped screen with a diameter of 590mm and a length of 800mm.