Magnesium-aluminum hydrotalcite slurry filtering and washing device

Abstract

The invention discloses a magnesium-aluminum hydrotalcite slurry filtering and washing device, which relates to the technical field of slurry filtering and washing and comprises a sealed kettle body, a feed pipe arranged at the top of the sealed kettle body and a discharge pipe inserted into the bottom of the sealed kettle body, an annular gas disc which can float up and down along with the rising and falling of the liquid level on the sealed kettle body and is adjustable in inner diameter, and a rotating frame which is arranged at the top of the inner wall of the sealed kettle body and is used for driving the annular gas disc to rotate in a reciprocating manner are mounted in the sealed kettle body; air is continuously supplied to the annular air disc through the air inlet mechanism, a plurality of spray heads inclining downwards are inserted into the side wall of each arc-shaped pipe, annular airflow is formed on the inner wall of the sealed kettle body, solid particles attached to the inner wall are more thoroughly separated through shearing force and impact force generated by the airflow, the annular air disc is located above the liquid level all the time, and the separation effect is better. And self-adaptive adjustment is performed according to the inner wall of the sealed kettle body, so that solids on the inner wall of the sealed kettle body are thoroughly cleaned from top to bottom.

Description

Technical Field

[0001] The present invention relates to the technical field of slurry filtration and washing, and particularly to a magnesium-aluminum hydrotalcite slurry filtration and washing device. Background Art

[0002] Magnesium-aluminum hydrotalcite is a layered double metal hydroxide with special properties and wide applications. Due to its special layered structure and surface properties, magnesium-aluminum hydrotalcite has good adsorption ability for some ions and molecules. It can adsorb anions in solution, such as chloride ions, sulfate ions, etc., through ion exchange, and can also adsorb some organic molecules, such as dye molecules, surfactants, etc., through physical adsorption. In the preparation process of magnesium-aluminum hydrotalcite, some impurities may be introduced, such as unreacted raw materials, by-products generated during the reaction, and metal ions from production equipment. These impurities will affect the purity and performance of magnesium-aluminum hydrotalcite. Through filtration and washing, these impurities can be effectively removed. The washing process can remove the impurities and ions adsorbed on the surface of magnesium-aluminum hydrotalcite particles, thereby improving the surface properties of the particles, such as surface charge, hydrophilicity, etc., improving the quality and purity of the product, enhancing the performance and stability of the product, and making it better meet the requirements of different application fields. The existing washing devices mainly include a kettle body, a stirring device, and a filtering component. The stirring device is used to fully mix the slurry with the washing liquid to achieve ion exchange and impurity removal, and then the filtering component is used to achieve solid-liquid separation. Currently, during the process of washing the slurry with the existing washing equipment, due to the relatively high roughness of the inner wall and bottom surface of the kettle body, microscopically, there are many tiny unevennesses. These rough surfaces increase the contact area between the slurry and the kettle body, making the slurry easily fall into these depressions and adhere to the inner wall of the kettle body. In addition, due to the relatively high viscosity of the slurry itself, strong intermolecular forces, and poor fluidity, this further enhances the adhesion force between the slurry and the inner wall of the kettle body. Especially during the discharging stage, as the liquid is discharged, the solid content increases, resulting in the slurry adhering more firmly to the inner wall of the kettle body, thus increasing the subsequent cleaning work.

[0003] In view of the above problems, it is urgent to innovate and design on the basis of the original washing device. Summary of the Invention

[0004] The technical solution of the present invention aims at the technical problem that the existing technical solutions are too single, and provides a solution significantly different from the existing technology. Specifically, the purpose of the present invention is to provide a magnesium-aluminum hydrotalcite slurry filtration and washing device to solve the problem that the slurry adheres to the inner wall of the washing kettle during discharging and is not easy to clean as mentioned in the above background art.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a filtration and washing device for magnesium-aluminum hydrotalcite slurry, comprising a sealed kettle, a feed pipe arranged at the top of the sealed kettle, and a discharge pipe plugged at the bottom of the sealed kettle, wherein the sealed kettle is provided with an annular gas disk with an adjustable inner diameter that can float up and down following the rise and fall of the liquid level on the sealed kettle, and a rotating frame arranged at the top of the inner wall of the sealed kettle for driving the annular gas disk to perform reciprocating rotation; A driving mechanism and an air intake mechanism installed on one side of the driving mechanism are also installed at the bottom of the sealed kettle body, and a filter plate is installed at a position on the inner wall of the sealed kettle body corresponding to the discharge pipe.

[0006] Preferably, the annular gas disk comprises a plurality of arc tubes distributed at equal angles and a limit rod fixedly connected to the top of the arc tubes, the arc tubes are distributed in close contact with the inner wall of the sealed kettle body, and a flexible connecting pipe is connected between two adjacent arc tubes; A plurality of downwardly inclined spray heads are plugged into the side wall of each arc-shaped tube, and an air intake hose is plugged into the top of one of the arc-shaped tubes.

[0007] Preferably, a sliding groove is provided on the surface of the rotating frame, and a spring telescopic rod is movably connected to the side wall of the limiting rod, and the limiting rod slides along the sliding groove on the surface of the rotating frame through the spring telescopic rod.

[0008] Preferably, the driving mechanism comprises at least two mutually meshing driving gears and a plurality of shifting blocks inserted on the surfaces of the driving gears, wherein the lower surface of one of the driving gears is fixedly connected to a rotating disk via a shaft, the lower surface of the other driving gear is mounted with an output shaft of a driving motor, and a driven gear is provided on one side of the driving gear; The driving gear rotates to drive the shifting block to perform rotational displacement, and further shifts the driven gear to perform reciprocating rotational motion.

[0009] Preferably, the air intake mechanism comprises a sealing tube, the inner wall of the sealing tube is slidably connected with a sealing plug, and one side of the sealing plug is connected with a connecting rod; The connecting rod is divided into an inner connecting rod and an outer connecting rod. The outer connecting rod is rotatably connected to the rotating disk, and the inner connecting rod is rotatably connected to the sealing plug.

[0010] Preferably, when the turntable rotates, the outer connecting rod is pulled to move on the surface of the turntable, and further drives the inner connecting rod and the sealing plug to perform reciprocating linear motion along the inner wall of the sealing tube.

[0011] Preferably, an air inlet pipe and an exhaust pipe are respectively plugged into the surface of the sealing pipe, and a one-way air guide valve is installed on the inner wall of the air inlet pipe and the exhaust pipe; A conduit is inserted into the end of the exhaust pipe, and the conduit is fixedly connected to the air intake hose.

[0012] Preferably, stirring shafts are welded to the upper surfaces of both the driving gear and the driven gear, and a plurality of dial plates are mounted on the surface of each stirring shaft, and the dial plates are located at the bottom of the inner wall of the sealed kettle body.

[0013] Preferably, the stirring shaft located on the upper surface of the driven gear is fixedly connected to the rotating frame.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: By adding an annular air disk with adjustable inner diameter to the inner wall of the sealed kettle body, and continuously supplying gas to the annular air disk through the air inlet mechanism, a plurality of nozzles inclined downward are inserted on the side wall of each arc-shaped pipe, and there is a certain gap from the upper liquid level in the sealed kettle body. These nozzles can make the gas eject at a specific angle and direction. When the gas ejects, it promotes the separation of the solid particles attached to the inner wall.

[0015] At the same time, through the alternating meshing of the two driving gears and their edge blocks with the driven gear, the reciprocating rotational motion of the driven gear is accurately controlled, and further drives the rotating frame to drive the annular air disk to perform a reciprocating rotational motion, so that the gas ejected by the annular air disk forms an annular air flow on the inner wall of the sealed kettle body. By using the shear force and impact force generated by the air flow, the solid particles attached to the inner wall are separated more thoroughly.

[0016] In addition, the rotation of the turntable drives the displacement of the connecting rod. As the connecting rod displaces, it drives the sealing plug to perform a reciprocating linear motion along the inner wall of the sealing pipe, ensuring a stable and continuous air inlet process, continuously providing the required gas for the sealed kettle body. The air pressure drives the annular air disk to slowly descend along the inner wall of the sealed kettle body. Since the air pressure is lower than the water pressure, the annular air disk is always located above the liquid level. During the discharging process, the annular air disk continuously clings to the inner wall edge of the sealed kettle body, and makes an adaptive adjustment according to the inner wall of the sealed kettle body, blowing out an annular air flow, so as to realize the thorough cleaning of the solid on the inner wall of the sealed kettle body from top to bottom. Description of the Drawings

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 It is a schematic sectional structure diagram of the present invention.

[0019] Figure 3 It is a schematic diagram of the structure of the annular air disk and the rotating frame of the present invention.

[0020] Figure 4 It is a schematic diagram of the structure of the driving mechanism and the air inlet mechanism of the present invention.

[0021] Figure 5 It is a schematic bottom view of the driving mechanism and the air inlet mechanism of the present invention.

[0022] Figure 6 This is a schematic diagram of the piston and connecting rod structure of the present invention.

[0023] In the figure: 1, sealed kettle body; 2, feed pipe; 3, discharge pipe; 4, annular air disc; 401, arc-shaped pipe; 402, limit rod; 403, flexible connecting pipe; 404, spray head; 405, intake hose; 406, spring telescopic rod; 5, rotating frame; 6, driving mechanism; 601, driving gear; 602, dialing block; 603, turntable; 604, driven gear; 605, driving motor; 7, intake mechanism; 701, sealing pipe; 702, sealing plug; 703, inner connecting rod; 704, outer connecting rod; 705, intake pipe; 706, exhaust pipe; 707, conduit; 8, stirring shaft; 801, dial plate; 9, filter plate. Specific embodiments

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] Please refer to Figures 1 to 6 , the present invention provides a technical solution: a magnesium-aluminum hydrotalcite slurry filtration and washing device, including a sealed kettle body 1, a feed pipe 2 provided at the top of the sealed kettle body 1, and a discharge pipe 3 inserted at the bottom of the sealed kettle body 1. An annular air disc 4 that can float up and down following the rise and fall of the liquid level in the sealed kettle body 1 and whose inner diameter is adjustable is installed inside the sealed kettle body 1, and a rotating frame 5 provided at the top of the inner wall of the sealed kettle body 1 for driving the annular air disc 4 to perform a reciprocating rotational motion.

[0026] A driving mechanism 6 is further installed at the bottom of the sealed kettle body 1, and an intake mechanism 7 is installed on one side of the driving mechanism 6. A filter plate 9 is installed at the position of the inner wall of the sealed kettle body 1 corresponding to the discharge pipe 3.

[0027] By adding an annular air disc 4 with an adjustable inner diameter to the inner wall of the sealed kettle body 1, the annular air disc 4 can float up and down with the liquid level in the sealed kettle body 1 and can always remain directly above the liquid level. Regardless of the amount of liquid in the sealed kettle body 1, the annular air disc 4 is always located directly above. By continuously increasing the air pressure in the sealed kettle body 1 through the annular air disc 4, the liquid is squeezed out from the discharge port.

[0028] The rotating frame 5 drives the annular air disc 4 to perform a reciprocating rotational motion, so that the gas ejected by the annular air disc 4 forms an annular air flow on the inner wall of the sealed kettle body 1. By using the shear force and impact force generated by the air flow, the solid particles attached to the inner wall are separated.

[0029] Meanwhile, a filter plate 9 is installed on the inner wall of the sealed kettle body 1 corresponding to the position of the discharge pipe 3, which can filter the materials discharged from the discharge pipe 3, separate solids and liquids, ensure the purity of the discharge, prevent solid particles from entering the subsequent process, improve the product quality, and also help protect the subsequent equipment. In this embodiment, as Figure 2 and Figure 3 shown, the annular air disc 4 includes a number of arc-shaped pipes 401 evenly distributed at equal angles and a limiting rod 402 fixedly connected to the top of the arc-shaped pipe 401. The arc-shaped pipes 401 are distributed along the inner wall of the sealed kettle body 1, and a flexible connecting pipe 403 is connected between two adjacent arc-shaped pipes 401.

[0030] A number of spray nozzles 404 inclined downward are inserted into the side wall of each arc-shaped pipe 401, and an air inlet hose 405 is inserted into the top of one of the arc-shaped pipes 401.

[0031] As Figure 1 shown, a chute is provided on the surface of the rotating frame 5, and a spring telescopic rod 406 is movably connected to the side wall of the limiting rod 402. The limiting rod 402 slides along the chute on the surface of the rotating frame 5 through the spring telescopic rod 406.

[0032] It should be noted that the annular air disc 4 in this embodiment is composed of a number of arc-shaped pipes 401 evenly distributed at equal angles and is distributed along the inner wall of the sealed kettle body 1. The adjacent arc-shaped pipes 401 are connected by a flexible connecting pipe 403, so that the annular air disc 4 has a certain flexibility during installation and use and can adapt to the shape change inside the sealed kettle body 1.

[0033] In this embodiment, the sealed kettle body 1 is designed in a conical shape for easy discharging. As the liquid level in the sealed kettle body 1 drops, under the action of air pressure, the annular air disc 4 slides down synchronously. The inner diameter of the inner wall of the conical sealed kettle body 1 gradually decreases. During the process of the annular air disc 4 sliding down along the inner wall of the sealed kettle body 1, the limiting rod 402 at the top of each arc-shaped pipe 401 slides along the chute of the rotating frame 5, continuously reducing the inner diameter and always maintaining a fitting state with the sealed kettle body 1.

[0034] In addition, a number of spray nozzles 404 inclined downward are inserted on the side wall of each arc-shaped pipe 401, and there is a certain gap from the upper liquid level in the sealed kettle body 1. These spray nozzles 404 can make the gas spray out at a specific angle and direction. When the gas sprays out, it flows along the edge of the inner wall of the sealed kettle body 1 to form an annular air flow, and the solid particles on the inner wall of the sealed kettle body 1 are separated from the inner wall through the air flow technique.

[0035] In this embodiment, as Figure 4 and Figure 5As shown in the figure, the driving mechanism 6 includes at least two meshing driving gears 601 and a plurality of sliders 602 inserted on the surface of the driving gears 601. The lower surface of one of the driving gears 601 is fixedly connected to a turntable 603 through a shaft rod, and the output shaft of a driving motor 605 is installed on the lower surface of the other driving gear 601. A driven gear 604 is provided on one side of the driving gear 601.

[0036] The rotation of the driving gear 601 drives the slider 602 to perform a rotational displacement, further driving the driven gear 604 to perform a reciprocating rotational motion.

[0037] It should be noted that the driving mechanism 6 rotates one driving gear 601 through the driving motor 605. This driving gear 601 meshes with the other driving gear 601, so that the other driving gear 601 rotates synchronously and in the opposite direction. A number of sliders 602 are evenly distributed on the outer edge of the driving gear 601. When the slider 602 of one of the driving gears 601 meshes with the driven gear 604, the driven gear 604 rotates accordingly; when the slider 602 of the other driving gear 601 meshes with the driven gear 604, the driven gear 604 rotates in the opposite direction. Through the alternating meshing of the two driving gears 601 and the sliders 602 on their edges with the driven gear 604, the reciprocating rotational motion of the driven gear 604 is precisely controlled.

[0038] In this embodiment, as Figure 4 and Figure 5 shown, the intake mechanism 7 includes a sealing pipe 701. A sealing plug 702 is slidably connected to the inner wall of the sealing pipe 701, and a connecting rod is connected to one side of the sealing plug 702.

[0039] The connecting rod is divided into an inner connecting rod 703 and an outer connecting rod 704. The outer connecting rod 704 is rotatably connected to the turntable 603, and the inner connecting rod 703 is rotatably connected to the sealing plug 702.

[0040] In this embodiment, as Figure 5 and Figure 6 shown, when the turntable 603 rotates, it pulls the outer connecting rod 704 to perform a displacement on the surface of the turntable 603, further driving the inner connecting rod 703 and the sealing plug 702 to perform a reciprocating linear motion along the inner wall of the sealing pipe 701.

[0041] It should be noted that the turntable 603 is connected to one of the driving gears 601 through a shaft rod. When one of the driving gears 601 rotates, it drives the turntable 603 to start synchronous rotation. The outer connecting rod 704 is arranged outside the sealing tube 701, and the inner connecting rod 703 extends into the sealing tube 701 and is connected to the sealing plug 702. When the turntable 603 rotates, it drives the outer connecting rod 704 on its surface to move displacement, further pulling the sealing plug 702 to slide reciprocally along the sealing tube 701 periodically, converting the rotational motion of the gear into the linear motion of the sealing plug 702, ensuring a stable and continuous intake process, continuously providing the required gas for the sealed kettle body 1. As the internal air pressure of the sealed kettle body 1 increases, the valve of the discharge pipe 3 is opened, and the air pressure pushes the solid-liquid mixture inside to be discharged through the discharge pipe 3. At the same time, the air pressure drives the annular air disc 4 to slowly descend along the inner wall of the sealed kettle body 1. During the discharging process, the annular air disc 4 continuously clings to the inner wall edge of the sealed kettle body 1, adjusts adaptively according to the inner wall of the sealed kettle body 1, and blows out an annular air flow, thereby realizing a thorough cleaning of the solids on the inner wall of the sealed kettle body 1 from top to bottom.

[0042] In this embodiment, as Figure 4 shown, an intake pipe 705 and an exhaust pipe 706 are respectively inserted into the surface of the sealing tube 701, and one-way air guiding valves are installed on the inner walls of the intake pipe 705 and the exhaust pipe 706; The end of the exhaust pipe 706 is inserted with a conduit 707, and the conduit 707 is fixedly connected to the intake hose 405.

[0043] It should be noted that through the reciprocating sliding of the sealing plug 702, the external air is continuously conveyed into the conduit 707, enters the intake hose 405 through the conduit 707, and is conveyed to the annular air disc 4 through the intake hose 405. The specific process is as follows: Inhalation stage: When the turntable 603 rotates, it pulls the inner connecting rod 703 through the outer connecting rod 704, driving the sealing plug 702 to move along the inner wall of the sealing tube 701 in a direction away from the intake pipe 705. The internal space of the sealing tube 701 increases, the air pressure decreases, and the external air enters the sealing tube 701 through the one-way air guiding valve. The one-way air guiding valve only allows gas to flow unidirectionally, and this one-way air guiding valve belongs to the prior art.

[0044] Gas transmission stage: As the turntable 603 continues to rotate, the connecting rod starts to reset, pushing the sealing plug 702 to move in the reverse direction, moving towards the intake pipe 705. The internal space of the sealing tube 701 decreases, the air pressure increases. At this time, the one-way air guiding valve of the intake pipe 705 closes, while the one-way air guiding valve of the exhaust pipe 706 opens. The compressed gas enters the intake hose 405 through the exhaust pipe 706 and the conduit 707, and is finally conveyed to the annular air disc 4, realizing the intake of air into the sealed kettle body 1.

[0045] In this embodiment, as Figure 1As shown, stirring shafts 8 are welded to the upper surfaces of the driving gear 601 and the driven gear 604 respectively. A dial 801 is installed on the surface of each stirring shaft 8, and the dial 801 is located at the bottom of the inner wall of the sealed kettle body 1.

[0046] The stirring shaft 8 located on the upper surface of the driven gear 604 is fixedly connected to the rotating frame 5.

[0047] It should be noted that in this embodiment, the driving gear 601 continuously rotates in one direction, and the driven gear 604 rotates reciprocally. The different rotation modes of the driving gear 601 and the driven gear 604 cause the dials 801 and the stirring shafts 8 to have different motion characteristics. The dials 801 located on the driving gear 601 rotate in reverse synchronously respectively, and the dials 801 located on the driven gear 604 rotate reciprocally and periodically. At the same time, in cooperation with the stirring shaft 8, the dials 801 are located at the bottom of the inner wall of the sealed kettle body 1, and can directly act on the solid materials that are prone to deposition, preventing material accumulation and enabling the solid-liquid mixture inside the sealed kettle body 1 to be fully mixed.

[0048] Working principle: When using this magnesium-aluminum hydrotalcite slurry filtration and washing device, first, an appropriate amount of magnesium-aluminum hydrotalcite slurry and clear water are transported into the sealed kettle body 1 through the feed pipe 2. The driving motor 605 is started, and the driving motor 605 drives one of the driving gears 601 to rotate. As the driving gear 601 rotates, the other driving gear 601 starts to rotate in the opposite direction, thereby driving the stirring shafts 8 and the turntable 603 inside the sealed kettle to rotate in the opposite direction, so as to fully stir the internal solid-liquid mixture to wash the impurities on the surface of the magnesium-aluminum hydrotalcite.

[0049] Secondly, as the driving gear 601 continuously rotates, the dial blocks 602 on the surface of the driving gear 601 sequentially contact the driven gear 604. When the dial block 602 of one of the driving gears 601 meshes with the driven gear 604, the driven gear 604 rotates accordingly; when the dial block 602 of the other driving gear 601 meshes with the driven gear 604, the driven gear 604 rotates in the opposite direction, and the driven gear 604 starts to perform a reciprocating rotational motion, further driving the rotating frame 5 and the annular air disc 4 above it to perform a reciprocating rotational motion.

[0050] At the same time, the turntable 603 connected to the lower surface of the driving gear 601 starts to rotate. As the turntable 603 rotates, it drives the connecting rod to pull the sealing plug 702 to slide reciprocally along the sealing pipe 701. When the sealing plug 702 moves away from the air inlet pipe 705, gas enters the sealing pipe 701 from the air inlet pipe 705. When the sealing plug 702 returns to its original position, gas enters the conduit 707 from the exhaust pipe 706 and is transported to the annular air disc 4 through the conduit 707. The turntable 603 continues to rotate, and the sealing plug 702 continuously makes reciprocating linear motions, and the processes of inhaling and delivering gas are cycled to continuously provide the gas required for the reaction for the sealed kettle body 1; Next, the gas enters the annular gas disk 4 and is discharged through the nozzle 404. The position of the nozzle 404 is aligned with the liquid in the sealed kettle body 1. The nozzle 404 causes the gas to be ejected at a specific angle and direction. When the gas is ejected, it flows along the edge of the inner wall of the sealed kettle body 1, and cooperates with the rotating frame 5 to drive the annular gas disk 4 to reciprocate to form a complete annular airflow. With the continuous operation of the air intake mechanism 7, the gas gathered in the sealed kettle body 1 increases, and the air pressure increases accordingly. At this time, the magnesium-aluminum hydrotalcite in the sealed kettle body 1 has been cleaned. With the further increase in air pressure, the squeezed liquid is discharged through the discharge pipe 3 and filtered through the filter plate 9 to achieve solid-liquid separation. During the liquid discharge process, the air pressure is less than the water pressure, ensuring that the annular gas disk 4 always remains directly above the liquid level on the sealed kettle body 1.

[0051] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A magnesium-aluminum hydrotalcite slurry filtration and washing device, comprising a sealed kettle body (1), a feed pipe (2) arranged at the top of the sealed kettle body (1), and a discharge pipe (3) inserted at the bottom of the sealed kettle body (1), characterized in that: The sealed kettle body (1) is internally provided with an annular gas disk (4) with an adjustable inner diameter that can float up and down following the rise and fall of the liquid level on the sealed kettle body (1), and a rotating frame (5) disposed on the top of the inner wall of the sealed kettle body (1) for driving the annular gas disk (4) to perform reciprocating rotational motion; A driving mechanism (6) and an air intake mechanism (7) installed on one side of the driving mechanism (6) are also installed at the bottom of the sealed kettle body (1), and a filter plate (9) is installed at a position on the inner wall of the sealed kettle body (1) corresponding to the discharge pipe (3).

2. The magnesium-aluminum hydrotalcite slurry filtration and washing device according to claim 1, wherein: The annular gas disk (4) comprises a plurality of arc-shaped tubes (401) distributed at equal angles and a limiting rod (402) fixedly connected to the top of the arc-shaped tubes (401); the arc-shaped tubes (401) are arranged in close contact with the inner wall of the sealed kettle body (1); and a flexible connecting tube (403) is connected between two adjacent arc-shaped tubes (401); A plurality of downwardly inclined spray heads (404) are plugged into the side wall of each arc-shaped tube (401), and an air intake hose (405) is plugged into the top of one of the arc-shaped tubes (401).

3. The magnesium-aluminum hydrotalcite slurry filtration and washing device according to claim 2, characterized in that: A sliding groove is provided on the surface of the rotating frame (5); a spring telescopic rod (406) is movably connected to the side wall of the limiting rod (402); and the limiting rod (402) slides along the sliding groove on the surface of the rotating frame (5) via the spring telescopic rod (406).

4. The magnesium-aluminum hydrotalcite slurry filtration and washing device according to claim 2, wherein: The driving mechanism (6) comprises at least two mutually meshing driving gears (601) and a plurality of shifting blocks (602) plugged into the surfaces of the driving gears (601), wherein the lower surface of one of the driving gears (601) is fixedly connected to a rotating disk (603) via a shaft, and the lower surface of the other driving gear (601) is mounted with an output shaft of a driving motor (605), and a driven gear (604) is provided on one side of the driving gear (601); The driving gear (601) rotates to drive the shifting block (602) to perform rotational displacement, and further shifts the driven gear (604) to perform reciprocating rotational motion.

5. The magnesium-aluminum hydrotalcite slurry filtration and washing device according to claim 2, characterized in that: The air intake mechanism (7) comprises a sealing tube (701), the inner wall of the sealing tube (701) is slidably connected to a sealing plug (702), and one side of the sealing plug (702) is connected to a connecting rod; The connecting rod is divided into an inner connecting rod (703) and an outer connecting rod (704); the outer connecting rod (704) is rotatably connected to the rotating disk (603); and the inner connecting rod (703) is rotatably connected to the sealing plug (702).

6. The magnesium-aluminum hydrotalcite slurry filtration and washing device according to claim 5, wherein: When the rotating disk (603) rotates, it pulls the outer connecting rod (704) to move on the surface of the rotating disk (603), and further drives the inner connecting rod (703) and the sealing plug (702) to perform reciprocating linear motion along the inner wall of the sealing tube (701).

7. The magnesium-aluminum hydrotalcite slurry filtration and washing device according to claim 5, characterized in that: An air intake pipe (705) and an air exhaust pipe (706) are respectively plugged into the surface of the sealing pipe (701), and one-way air guide valves are installed on the inner walls of the air intake pipe (705) and the air exhaust pipe (706); A conduit (707) is inserted into the end of the exhaust pipe (706), and the conduit (707) is fixedly connected to the air intake hose (405).

8. The magnesium-aluminum hydrotalcite slurry filtration and washing device according to claim 4, characterized in that: The upper surfaces of the driving gear (601) and the driven gear (604) are both welded with stirring shafts (8), and a dial (801) is installed on the surface of each stirring shaft (8), and the dial (801) is located at the bottom of the inner wall of the sealed kettle body (1).

9. The magnesium-aluminum hydrotalcite slurry filtration and washing device according to claim 8, characterized in that: The stirring shaft (8) located on the upper surface of the driven gear (604) is fixedly connected to the rotating frame (5).

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