A device for separating and washing fine seeds

Abstract

The utility model provides a kind of fine seed separation and washing device, it is related to aluminium oxide production technical field.The utility model includes the filter cloth that horizontal circulation is moved on horizontal belt vacuum filter, multiple negative pressure box is located in filter cloth bottom, two pressing plates are respectively located in filter cloth two side edges top and are connected with negative pressure box, the negative pressure box top is opened and edge and filter cloth bottom sliding contact, the pressing plate bottom and filter cloth sliding contact, the pressing plate below is in turn filter cloth edge and negative pressure box top opening edge, vibration motor is equipped on the pressing plate.The utility model makes fine seed vibration to improve liquid fluidity, improve suction filtration efficiency and suction filtration effect.

Description

Technical Field

[0001] This utility model relates to the field of alumina production technology, specifically to a device for separating and washing fine seeds. Background Technology

[0002] In alumina production, especially in the Bayer process, fine seeds typically refer to aluminum hydroxide seed crystals with a particle size of 1~10μm. The separation and washing of fine seeds is a key process. The core purpose is to recover the alkaline solution adhering to the surface of the seed crystals, reduce alkali consumption, improve seed crystal purity, and ensure the efficiency of subsequent decomposition.

[0003] Currently, the separation and washing devices for fine seeds include horizontal belt vacuum filters, in which the filter belt moves horizontally, the slurry forms a filter cake on the filter belt, and multiple spray washing is performed. A vacuum box continuously filters the material below the filter belt. In the existing technology, the efficiency of vacuum filtration is relatively low. In order to meet the filtration effect, the filtration area can only be extended, which leads to an increase in the size of the machine and the cost. Utility Model Content

[0004] The purpose of this invention is to develop a device for separating and washing fine seeds by vibrating them to improve liquid flowability, thereby increasing filtration efficiency and effect.

[0005] This utility model is achieved through the following technical solution:

[0006] A fine seed separation and washing apparatus, comprising:

[0007] Filter cloth that moves horizontally in a vacuum belt filter;

[0008] Multiple negative pressure boxes are located at the bottom of the filter cloth;

[0009] Two pressure plates are respectively located on the top of the two sides of the filter cloth and connected to the negative pressure box;

[0010] The negative pressure box has an opening at the top with its edge slidingly contacting the bottom of the filter cloth. The bottom of the pressure plate also slides in contact with the filter cloth. Below the pressure plate are the edge of the filter cloth and the edge of the opening at the top of the negative pressure box. A vibration motor is installed on the pressure plate.

[0011] Optionally, the negative pressure box is rectangular and arranged along the direction of filter cloth movement, and the width of the negative pressure box is smaller than the width of the filter cloth.

[0012] Optionally, the lower part of the negative pressure box is shaped like a truncated pyramid, and a negative pressure pipe is connected to the bottom of the negative pressure box. The negative pressure pipe is a flexible pipe or a hose, and the negative pressure pipe is connected to the negative pressure system.

[0013] Optionally, the bottom of the negative pressure box is connected to a plurality of first spring telescopic rods, the first spring telescopic rods are connected to the frame of the horizontal belt vacuum filter, and the first spring telescopic rods are connected to the negative pressure box by a universal ball joint.

[0014] Optionally, the pressure plate is parallel to the edge of the negative pressure box and its width is adapted to the edge of the negative pressure box. The gap between the pressure plate and the edge of the negative pressure box is adapted to the thickness of the filter cloth. Multiple U-shaped connecting rods are connected between the outer wall of the pressure plate and the side wall of the negative pressure box.

[0015] Optionally, the bottom of the pressure plate is provided with multiple slots at equal intervals, and a pressure roller is rotatably provided in the slot. The rotation axis of the pressure roller is horizontal and perpendicular to the movement direction of the filter cloth, and the pressure roller makes rolling contact with the filter cloth at the bottom of the pressure plate.

[0016] Optionally, the two ends of the pressure roller shaft are respectively provided with sliding blocks, which are slidably connected to the two side walls of the slot, and the top of the sliding block is provided with a second spring telescopic rod connected to the top of the slot.

[0017] Optionally, a baffle plate is provided at the end of the pressure plate near the beginning of the filter cloth conveying. In the direction of movement of the filter cloth, the baffle plate gradually tilts towards the middle of the filter cloth, and the bottom of the baffle plate slides in contact with the filter cloth.

[0018] Optionally, the negative pressure box is provided with sealing strips on the top of the two sides of its edge perpendicular to the direction of filter cloth movement, and the two ends of the sealing strips are respectively located under the two pressure plates.

[0019] Optionally, a groove adapted to the sealing strip is provided on the edge of the negative pressure box at the lower part of the sealing strip, and multiple top blocks are connected to the bottom of the sealing strip. A third spring telescopic rod is connected between the bottom of the top block and the bottom of the groove.

[0020] The beneficial effects of this utility model are:

[0021] This invention improves the sealing of the negative pressure chamber by using a pressure plate and sealing strips, thereby increasing the filtration efficiency and effect. A vibration motor is installed on the pressure plate to make the fine seeds vibrate during the filtration process to improve the fluidity of the liquid, further improving the filtration efficiency and effect. The length of the negative pressure area can be reduced to control the volume of the machine body. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a structural diagram of the present utility model;

[0024] Figure 2 for Figure 1 Top view;

[0025] Figure 3 This is a top view of the negative pressure chamber;

[0026] Figure 4 This is a diagram of the bottom structure of the sealing strip;

[0027] Figure 5 This is a diagram of the pressure plate structure.

[0028] Reference numerals in the attached diagram: 1. Filter cloth; 2. Pressure plate; 3. Frame; 4. First spring telescopic rod; 5. Baffle plate; 6. U-shaped connecting rod; 7. Vibration motor; 8. Negative pressure pipe; 9. Negative pressure box; 10. Sealing strip; 11. Top block; 12. Third spring telescopic rod; 13. Pressure roller; 14. Second spring telescopic rod; 15. Slide seat; 16. Groove. Detailed Implementation

[0029] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0030] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention 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 limiting this invention.

[0031] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0032] like Figures 1-5 As shown, this utility model discloses a device for separating and washing fine seeds, including a filter cloth 1 that moves horizontally in a vacuum filter. The movement area of ​​the filter cloth 1 includes an upper horizontal section, a lower return section, and rotating sections on both sides. Fine seeds conveyed on the filter cloth 1 are conveyed in the horizontal section. Figure 1 Only the horizontal section of filter cloth 1 is shown in the image.

[0033] The bottom of the horizontal section of the filter cloth 1 is provided with three negative pressure boxes 9 connected in sequence. The negative pressure boxes 9 are rectangular and arranged along the movement direction of the filter cloth 1. The width of the negative pressure box 9 is smaller than the width of the filter cloth 1. The fine seeds conveyed on the filter cloth 1 pass through the area covered by the negative pressure box 9.

[0034] The negative pressure box 9 has an opening at the top and a truncated quadrangular shape at the bottom for material collection. The bottom of the negative pressure box 9 is connected to a negative pressure pipe 8, which is a flexible pipe or a hose, and is connected to the negative pressure system.

[0035] The bottom of the negative pressure box 9 is connected to multiple first spring telescopic rods 4. The first spring telescopic rods 4 are connected to the frame 3 of the horizontal belt vacuum filter. The first spring telescopic rods 4 and the negative pressure box 9 are connected by a universal ball joint. The negative pressure box 9 can be slightly elastically displaced through the first spring telescopic rods 4.

[0036] Pressure plates 2 are provided on the top of the two sides of the negative pressure box 9 in the direction of movement of the filter cloth 1. The pressure plates 2 are parallel to the edge of the negative pressure box 9 and the width is adapted to the edge of the negative pressure box 9. The gap between the pressure plates 2 and the edge of the negative pressure box 9 is adapted to the thickness of the filter cloth 1. Multiple U-shaped connecting rods 6 are connected between the outer wall of the pressure plates 2 and the side wall of the negative pressure box 9 to fix the pressure plates 2 and the negative pressure box 9.

[0037] The bottom of the pressure plate 2 has multiple equally spaced slots 16. A pressure roller 13 is rotatably mounted within each slot 16. The rotation axis of the pressure roller 13 is horizontal and perpendicular to the direction of movement of the filter cloth 1. The pressure roller 13 rolls in contact with the filter cloth 1 at the bottom of the pressure plate 2, reducing the resistance of the filter cloth 1 as it passes over the pressure plate 2. Slide seats 15 are rotatably mounted at both ends of the rotation axis of the pressure roller 13. The slide seats 15 are slidably connected to the side walls of the slots 16, allowing the pressure roller 13 to rotate within the slots 16 while also sliding vertically. A second spring telescopic rod 14 is mounted on the top of the slide seat 15 and connected to the top of the slot 16. The elastic force of the second spring telescopic rod 14 pushes the slide seat 15 downwards, maintaining rolling contact between the pressure roller 13 and the filter cloth 1 at the bottom of the pressure plate 2.

[0038] A baffle plate 5 is provided at the end of the pressure plate 2 near the beginning of the filter cloth 1 conveying process. The baffle plate 5 is inclined in the direction of filter cloth 1 movement and gradually tilts towards the middle of the filter cloth 1. The bottom of the baffle plate 5 slides in contact with the filter cloth 1. When the filter cloth 1 conveys material into the inner area of ​​the two pressure plates 2, the material at the edge of the filter cloth 1 is pushed inward by the baffle plate 5 to prevent the material from entering the bottom of the pressure plate 2.

[0039] Multiple vibration motors 7 are evenly arranged on the top of the pressure plate 2. The operation of the vibration motors 7 causes the pressure plate 2 to vibrate, which in turn causes the filter cloth 1 to vibrate, and the negative pressure box 9 also vibrates.

[0040] Sealing strips 10 are provided on the top of the two sides of the negative pressure box 9 perpendicular to the direction of movement of the filter cloth 1. The two ends of the sealing strips 10 are located at the bottom of the two pressure plates 2. The edge of the negative pressure box 9 at the bottom of the sealing strips 10 is provided with a groove that fits the sealing strips 10. Multiple top blocks 11 are connected to the bottom of the sealing strips 10. A third spring telescopic rod 12 is connected between the bottom of the top block 11 and the bottom of the groove. The multiple top blocks 11 lift the sealing strips 10 upward by the elastic force of the third spring telescopic rod 12, so that the sealing strips 10 and the bottom of the filter cloth 1 maintain sliding contact.

[0041] When the horizontal belt vacuum filter filters fine seeds, the fine seeds enter the area between the two pressure plates 2 along with the filter cloth 1. This area is where the three negative pressure boxes 9 are located. The negative pressure is generated in the negative pressure box 9 through the negative pressure pipe 8, which filters the fine seeds. The presence of the pressure plate 2 and the sealing strip 10 ensures that the filter cloth 1 is in close contact with the negative pressure box 9, improving the sealing performance of the negative pressure box 9 and increasing the filtration efficiency and effect. During the filtration process, the vibration motor 7 on the pressure plate 2 operates, causing the fine seeds on the filter cloth 1 to vibrate, improving the fluidity of the liquid in the fine seeds and increasing the filtration efficiency and effect. The pressure plate 2 and the negative pressure box 9 are structurally integrated, and the pressure roller 13 at the bottom of the pressure plate 2 presses firmly onto the filter cloth 1. The sealing strip 10 maintains sliding contact with the bottom of the filter cloth 1 under elastic force, so that the negative pressure box 9 still maintains a certain degree of sealing during the vibration of the filter cloth 1 and the fine seeds. In the direction of movement of the filter cloth 1, the negative pressure in the three negative pressure boxes 9 can gradually decrease, realizing staged filtration.

[0042] This invention improves the sealing performance of the negative pressure box 9 by using the pressure plate 2 and the sealing strip 10, thereby improving the filtration efficiency and effect. The pressure plate 2 is equipped with a vibration motor 7, which causes the fine seeds to vibrate during the filtration process to improve the fluidity of the liquid, further improving the filtration efficiency and effect. The length of the negative pressure area can be reduced, thereby controlling the volume of the machine body.

[0043] The above embodiments are merely preferred embodiments of this utility model and are not intended to limit the technical solutions of this utility model. Any technical solution that can be implemented based on the above embodiments without creative effort should be considered to fall within the scope of protection of this utility model patent.

Claims

1. A device for separating and washing fine seeds, characterized in that, include: Filter cloth that moves horizontally in a vacuum belt filter; Multiple negative pressure boxes are located at the bottom of the filter cloth; Two pressure plates are respectively located on the top of the two sides of the filter cloth and connected to the negative pressure box; The negative pressure box has an opening at the top with its edge slidingly contacting the bottom of the filter cloth. The bottom of the pressure plate also slides in contact with the filter cloth. Below the pressure plate are the edge of the filter cloth and the edge of the opening at the top of the negative pressure box. A vibration motor is installed on the pressure plate.

2. The fine seed separation and washing apparatus according to claim 1, characterized in that, The negative pressure box is rectangular and arranged along the direction of filter cloth movement, and the width of the negative pressure box is smaller than the width of the filter cloth.

3. The fine seed separation and washing apparatus according to claim 2, characterized in that, The lower part of the negative pressure box is shaped like a truncated pyramid, and a negative pressure pipe is connected to the bottom of the negative pressure box. The negative pressure pipe is a flexible pipe or a hose, and the negative pressure pipe is connected to the negative pressure system.

4. The fine seed separation and washing apparatus according to claim 1, characterized in that, The bottom of the negative pressure box is connected to multiple first spring telescopic rods. The first spring telescopic rods are connected to the frame of the horizontal belt vacuum filter, and the first spring telescopic rods are connected to the negative pressure box by a universal ball joint.

5. The fine seed separation and washing apparatus according to claim 2, characterized in that, The pressure plate is parallel to the edge of the negative pressure box and its width is adapted to the edge of the negative pressure box. The gap between the pressure plate and the edge of the negative pressure box is adapted to the thickness of the filter cloth. Multiple U-shaped connecting rods are connected between the outer wall of the pressure plate and the side wall of the negative pressure box.

6. The fine seed separation and washing apparatus according to claim 5, characterized in that, The bottom of the pressure plate is provided with multiple slots at equal intervals. A pressure roller is rotatably installed in the slot. The rotation axis of the pressure roller is horizontal and perpendicular to the movement direction of the filter cloth. The pressure roller makes rolling contact with the filter cloth at the bottom of the pressure plate.

7. The fine seed separation and washing apparatus according to claim 6, characterized in that, The pressure roller shaft has sliding blocks at both ends, which are slidably connected to the two side walls of the slot. The top of the sliding block is provided with a second spring telescopic rod that is connected to the top of the slot.

8. The apparatus for separating and washing fine seeds according to claim 5, characterized in that, A baffle plate is provided at the end of the pressure plate near the beginning of the filter cloth conveying. In the direction of movement of the filter cloth, the baffle plate gradually tilts towards the middle of the filter cloth, and the bottom of the baffle plate slides in contact with the filter cloth.

9. The fine seed separation and washing apparatus according to claim 2, characterized in that, The negative pressure box is provided with sealing strips on the top of its two sides perpendicular to the direction of filter cloth movement, and the two ends of the sealing strips are located under the two pressure plates.

10. The apparatus for separating and washing fine seeds according to claim 9, characterized in that, The edge of the negative pressure box at the lower part of the sealing strip is provided with a groove that is compatible with the sealing strip. Multiple top blocks are connected to the bottom of the sealing strip, and a third spring telescopic rod is connected between the bottom of the top block and the bottom of the groove.

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