Preparation equipment and preparation method of rod-like boehmite powder

Abstract

The preparation equipment comprises a first material mixing kettle, a second material mixing kettle, a hydrothermal reaction kettle, a centrifugal filter, a washing device and a drying machine, the washing device comprises a washing tank, the pitching angle of the washing tank is adjustable, a cleaning barrel is installed in the washing tank, a material inlet and outlet is formed in one end of the cleaning barrel, and a material outlet and a material outlet are formed in the other end of the washing barrel; the feeding and discharging opening is sealed through a detachable cover plate, a filter screen is arranged outside the cleaning cylinder, and the cleaning cylinder is driven to ascend and descend through an ascending and descending mechanism. In the raw material washing process, two movement modes of lifting and rotating are combined, so that powder materials are fully mixed and rinsed in the cleaning cylinder, the washing efficiency and effect are improved, the stirring shaft and the cleaning cylinder are driven to rotate in the opposite directions in a transmission mode, and the stirring effect is improved. And the automatic stirring effect in the lifting process can be further improved, so that the washing effect is further enhanced, and full stirring and washing of the powder material are ensured.

Description

Technical Field

[0001] The invention relates to the technical field of rod-shaped boehmite powder preparation, and in particular to a preparation device and a preparation method for rod-shaped boehmite powder. Background Art

[0002] Boehmite (γ-AlOOH), also known as boehmite, is widely used in lithium batteries, coatings, plastics, rubber and other industries. In recent years, with the increasing demand for nano-boehmite in various industry segments, the industrial research of nano-boehmite has received more and more attention. The preparation and application of inorganic nanomaterials with specific morphologies have become a hot topic in the field of materials science. Nanomaterials in the form of flakes, spheres and fibers have received widespread attention due to their unique physical and chemical properties and wide application value.

[0003] Boehmite is an important precursor for the preparation of alumina. Rod-shaped boehmite can maintain its original morphology after calcination to obtain rod-shaped alumina. Among them, rod-shaped nano-alumina with a large aspect ratio (aspect ratio greater than 15) can improve stress-strain properties due to its large elastic modulus and easy stacking, and is a good ceramic toughening body. Moreover, rod-shaped boehmite itself can also be directly used for toughening.

[0004] During the processing of boehmite, the product needs to be washed. In the prior art, the product is mainly washed in a washing kettle. This washing method has a poor stirring effect on the product, resulting in low washing efficiency. More water and more washing times are required to completely remove the residual reactants, which is time-consuming and wastes water resources. Summary of the invention

[0005] In order to solve the problems mentioned in the above background technology, the present invention provides a preparation device and a preparation method for rod-shaped boehmite powder.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A preparation device for rod-shaped boehmite powder comprises a first mixing kettle, a second mixing kettle, a hydrothermal reaction kettle, a centrifugal filter, a washing device and a dryer, wherein the washing device comprises a water washing tank, the pitch angle of the water washing tank is adjustable, a washing cylinder is installed in the water washing tank, one end of the washing cylinder is provided with an inlet and outlet, the inlet and outlet are sealed by a detachable cover plate, a filter is provided on the outside of the washing cylinder, and the washing cylinder is driven to rise and fall by an upgrading mechanism.

[0008] Preferably, the bottom end of the water washing tank is provided with a supporting leg and a hydraulic cylinder, the top end of the supporting leg is hinged to the bottom end of the water washing tank, the bottom end of the hydraulic cylinder is connected to a supporting seat, and the output shaft of the hydraulic cylinder is hinged to the bottom end of the water washing tank.

[0009] Preferably, the upgrading mechanism comprises a lifting bracket, which is vertically movably mounted on the washing tank, and is connected to a driving cross bar. A rotating motor is fixed on the outer wall of the washing tank, and a vertically arranged threaded rod is fixed on the output shaft of the rotating motor, and the threaded rod passes through the driving cross bar through a threaded hole.

[0010] Preferably, two vertical guide rails arranged parallel to each other are fixed on the outside of the washing tank, and guide sliders are fixed at both ends of the driving cross bar, and the two guide sliders are slidably installed on the two vertical guide rails respectively.

[0011] Preferably, the lifting bracket is U-shaped, and a mounting bracket is fixed to the end of the lifting bracket away from the driving horizontal bar, and a mounting tube is fixed to the end of the cleaning cylinder away from the cover plate. The mounting tube is rotatably connected to the mounting bracket, and a first gear is fixed to the outside of the mounting tube. A vertically arranged first rack is fixed on the inner wall of the bottom end of the washing tank, and the first rack is meshed with the first gear.

[0012] Preferably, a stirring shaft is rotatably installed inside the mounting tube, one end of the stirring shaft extends to the outside of the cleaning barrel through the mounting tube and is fixed with a second gear, and a vertically arranged second rack is fixed on the inner wall of the bottom end of the washing tank, the second rack is meshed with the second gear, and the first rack and the second rack are respectively located on both sides of the second gear.

[0013] Preferably, a plurality of stirring branches are fixed to the outside of the stirring shaft, and the stirring branches are evenly distributed along the axial direction of the stirring shaft.

[0014] Preferably, a notch is provided on one side of the water washing tank close to the inlet and outlet of the cleaning cylinder, and an inclined material guiding curved plate is installed on the notch.

[0015] A method for preparing rod-shaped boehmite powder comprises the following steps:

[0016] S1: Put aluminum chloride aqueous solution and urea into a first mixing kettle for mixing and stirring, and ripen at a certain temperature to obtain material A.

[0017] S2: adding alumina and water into a second mixing kettle to obtain alumina slurry, adjusting the pH value with H2SO4, and obtaining material B;

[0018] S3: mixing the material A of step 1 and the material B of step 2 evenly and placing them in a hydrothermal reactor for hydrothermal reaction;

[0019] S4: The product after the hydrothermal reaction is cooled, filtered through a centrifugal filter, washed through a washing device, and finally dried through a dryer to obtain a finished product, which is then packaged.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. In the process of washing raw materials, the present invention combines the two motion modes of lifting and rotating, so that the powder materials are fully mixed and rinsed inside the washing cylinder, thereby improving the washing efficiency and effect;

[0022] 2. When the lifting bracket drives the cleaning barrel to rise and fall, the second gear rolls along the second rack, thereby driving the stirring shaft to rotate. Since the first rack and the second rack are respectively located on both sides of the second gear, the rotation direction of the stirring shaft is opposite to that of the cleaning barrel during the lifting process, which can further improve the automatic stirring effect during the lifting process, further enhance the washing effect, and ensure the full stirring and washing of the powder material;

[0023] 3. The pitch angle of the water washing can be adjusted by the extension and retraction of the hydraulic cylinder, so that the inlet and outlet of the washing cylinder can be tilted upward or downward, which is convenient for adding and discharging products. The design of the guide curved plate makes it possible to adjust the pitch angle of the water washing tank so that the inlet and outlet of the washing cylinder are tilted downward. The cleaned products can slide out more smoothly along the guide curved plate, reducing the risk of product residue and blockage and improving the efficiency of product discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 A first-view stereoscopic view of the washing device of the present invention;

[0026] Figure 2 A second perspective view of the washing device of the present invention;

[0027] Figure 3 A third perspective view of the washing device of the present invention;

[0028] Figure 4 is a perspective cross-sectional view of the washing device of the present invention from a fourth viewing angle;

[0029] Figure 5 It is a cross-sectional view of a water washing tank of the present invention;

[0030] Figure 6 for Figure 5 A zoomed-in detail of position A in the middle;

[0031] In the figure: 1 washing tank, 101 supporting leg, 102 hydraulic cylinder, 103 material guide curved plate, 104 wastewater discharge pipe, 105 second rack, 106 first rack, 2 lifting bracket, 201 mounting bracket, 3 vertical guide rail, 301 driving bar, 302 rotating motor, 303 threaded rod, 4 cleaning cylinder, 401 filter screen, 402 cover plate, 403 mounting pipe, 404 first gear, 5 stirring shaft, 501 stirring branch, 502 second gear. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Example 1

[0034] Reference Figure 1-6 , a preparation device for rod-shaped boehmite powder, comprising a first mixing kettle, a second mixing kettle, a hydrothermal reaction kettle, a centrifugal filter, a washing device and a dryer, the washing device comprising a water washing tank 1, the pitch angle of the water washing tank 1 is adjustable, a washing cylinder 4 is installed in the water washing tank 1, one end of the washing cylinder 4 is provided with an inlet and outlet, the inlet and outlet are sealed by a detachable cover plate 402, a filter screen 401 is provided on the outside of the washing cylinder 4, and the washing cylinder 4 is driven to rise and fall by an upgrading mechanism;

[0035] When using the washing device, first adjust the pitch angle of the washing tank 1 so that one end of the washing cylinder 4 is provided with an inlet and outlet that is tilted upward, add the products to be washed into the washing cylinder 4, close the cover 402, and adjust the washing cylinder 4 to a horizontal state. At this time, the washing cylinder 4 is driven to rise and fall by the upgrading mechanism, and the washing cylinder 4 can go in and out of the clean water to achieve the purpose of rinsing. After rinsing once, the waste water is discharged through the waste water discharge pipe 104, clean water is added, and rinsed again. After three to four times of washing, the washing is completed. After the washing is completed, adjust the pitch angle of the washing tank 1 so that one end of the washing cylinder 4 is provided with an inlet and outlet that is tilted downward, and open the cover 402, and the cleaned products can be poured out and sent to the dryer for drying.

[0036] Example 2

[0037] Reference Figure 1-6 The difference between this embodiment and embodiment 1 is that a support leg 101 and a hydraulic cylinder 102 are provided at the bottom end of the water washing tank 1, the top end of the support leg 101 is hinged to the bottom end of the water washing tank 1, the bottom end of the hydraulic cylinder 102 is connected to a support seat, and the output shaft of the hydraulic cylinder 102 is hinged to the bottom end of the water washing tank 1;

[0038] By extending the hydraulic cylinder 102, the end of the washing tank 1 close to the inlet and outlet of the cleaning cylinder 4 can be lifted up, and the end of the washing tank 1 close to the inlet and outlet of the cleaning cylinder 4 can be lowered by shortening the hydraulic cylinder 102, thereby achieving the purpose of adjusting the pitch angle of the washing tank 1.

[0039] Implementation 3

[0040] Reference Figure 1-6 The difference between this embodiment and the embodiment 1 is that the upgrading mechanism includes a lifting bracket 2, the lifting bracket 2 is vertically movably installed on the washing tank 1, the lifting bracket 2 is connected with a driving bar 301, a rotating motor 302 is fixed on the outer wall of the washing tank 1, and a vertically arranged threaded rod 303 is fixed on the output shaft of the rotating motor 302, and the threaded rod 303 penetrates the driving bar 301 through a threaded hole;

[0041] When the rotating motor 302 drives the threaded rod 303 , it can drive the driving bar 301 to move up and down, thereby driving the lifting bracket 2 to move up and down.

[0042] Among them, two vertical guide rails 3 arranged parallel to each other are fixed on the outside of the washing tank 1, and guide sliders are fixed at both ends of the driving horizontal bar 301, and the two guide sliders are slidably installed on the two vertical guide rails 3 respectively;

[0043] The vertical guide rail 3 guides the lifting and lowering movement of the lifting bracket 2, ensuring stability during the lifting process. This design reduces shaking during the lifting process and improves the overall performance and reliability of the equipment.

[0044] The lifting bracket 2 is U-shaped, and a mounting bracket 201 is fixed to one end of the lifting bracket 2 away from the driving horizontal bar 301, and a mounting pipe 403 is fixed to one end of the cleaning cylinder 4 away from the cover plate 402, and the mounting pipe 403 is rotatably connected to the mounting bracket 201, and a first gear 404 is fixed to the outside of the mounting pipe 403, and a vertically arranged first rack 106 is fixed on the inner wall of the bottom end of the washing tank 1, and the first rack 106 is meshed with the first gear 404;

[0045] When the lifting bracket 2 drives the cleaning cylinder 4 to rise and fall, the first gear 404 rolls along the first rack 106, thereby driving the cleaning cylinder 4 to rotate around its axis. This rotational motion helps the powder material to be evenly distributed inside the cleaning cylinder 4, thereby improving the washing effect.

[0046] The mounting tube 403 has a stirring shaft 5 rotatably mounted inside, one end of which extends to the outside of the cleaning tube 4 through the mounting tube 403 and is fixed with a second gear 502. A second rack 105 is vertically fixed on the inner wall of the bottom end of the washing tank 1. The second rack 105 is meshed with the second gear 502, and the first rack 106 and the second rack 105 are respectively located on both sides of the second gear 502.

[0047] When the lifting bracket 2 drives the cleaning drum 4 to lift, the second gear 502 rolls along the second rack 105, thereby driving the stirring shaft 5 to rotate. Since the first rack 106 and the second rack 105 are respectively located on both sides of the second gear 502, the rotation direction of the stirring shaft 5 is opposite to the rotation direction of the cleaning drum 4 during the lifting process, which can further improve the automatic stirring effect during the lifting process, further enhance the washing effect, and ensure sufficient stirring and washing of the powder material.

[0048] A plurality of stirring branches 501 are fixed to the outside of the stirring shaft 5 , and the stirring branches 501 are evenly distributed along the axial direction of the stirring shaft 5 .

[0049] Among them, a notch is opened on one side of the washing tank 1 close to the inlet and outlet of the cleaning cylinder 4, and an inclined material guide curved plate 103 is installed on the notch. The design of the material guide curved plate 103 allows the washed products to slide out more smoothly along the material guide curved plate 103 when the pitch angle of the washing tank 1 is adjusted so that the inlet and outlet of the cleaning cylinder 4 are tilted downward, thereby reducing the risk of product residue and blockage and improving the efficiency of product discharge.

[0050] Example 4

[0051] A method for preparing rod-shaped boehmite powder comprises the following steps:

[0052] S1: Put aluminum chloride aqueous solution and urea into a first mixing kettle for mixing and stirring, and ripen at a certain temperature to obtain material A.

[0053] S2: adding alumina and water into a second mixing kettle to obtain alumina slurry, adjusting the pH value with H2SO4, and obtaining material B;

[0054] S3: mixing the material A of step 1 and the material B of step 2 evenly and placing them in a hydrothermal reactor for hydrothermal reaction;

[0055] S4: The product after the hydrothermal reaction is cooled, filtered through a centrifugal filter, washed through a washing device, and finally dried through a dryer to obtain a finished product, which is then packaged.

[0056] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0057] In the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by technicians in this field. The provision of power is also common knowledge in this field. The present invention is mainly used to protect mechanical devices, so the present invention will no longer explain the control method and circuit connection in detail.

[0059] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A preparation device for rod-shaped boehmite powder, comprising a first mixing kettle, a second mixing kettle, a hydrothermal reaction kettle, a centrifugal filter, a washing device and a dryer, characterized in that: The washing device comprises a water washing tank (1), the pitch angle of the water washing tank (1) is adjustable, a washing cylinder (4) is installed in the water washing tank (1), one end of the washing cylinder (4) is provided with an inlet and outlet, the inlet and outlet are sealed by a detachable cover plate (402), a filter screen (401) is provided on the outside of the washing cylinder (4), and the washing cylinder (4) is driven to rise and fall by an upgrading mechanism.

2. The preparation device of a rod-shaped boehmite powder according to claim 1, characterized in that: The bottom end of the water washing tank (1) is provided with a support leg (101) and a hydraulic cylinder (102); the top end of the support leg (101) is hinged to the bottom end of the water washing tank (1); the bottom end of the hydraulic cylinder (102) is connected to a support seat; and the output shaft of the hydraulic cylinder (102) is hinged to the bottom end of the water washing tank (1).

3. The preparation device of a rod-shaped boehmite powder according to claim 1, characterized in that: The upgrading mechanism comprises a lifting bracket (2), the lifting bracket (2) is vertically movably mounted on the water washing tank (1), the lifting bracket (2) is connected to a driving cross bar (301), a rotating motor (302) is fixed on the outer wall of the water washing tank (1), a vertically arranged threaded rod (303) is fixed to the output shaft of the rotating motor (302), and the threaded rod (303) passes through the driving cross bar (301) through a threaded hole.

4. The preparation device of a rod-shaped boehmite powder according to claim 3, characterized in that: Two vertical guide rails (3) arranged parallel to each other are fixed on the outside of the washing tank (1), and guide sliders are fixed at both ends of the driving cross bar (301), and the two guide sliders are respectively slidably mounted on the two vertical guide rails (3).

5. The preparation device of rod-shaped boehmite powder according to claim 4, characterized in that: The lifting bracket (2) is U-shaped, and a mounting bracket (201) is fixed to one end of the lifting bracket (2) away from the driving horizontal bar (301), and a mounting pipe (403) is fixed to one end of the cleaning cylinder (4) away from the cover plate (402), the mounting pipe (403) is rotatably connected to the mounting bracket (201), a first gear (404) is fixed to the outside of the mounting pipe (403), and a first rack (106) is fixed vertically on the inner wall of the bottom end of the washing tank (1), and the first rack (106) is meshed with the first gear (404).

6. The preparation device of rod-shaped boehmite powder according to claim 5, characterized in that: A stirring shaft (5) is rotatably mounted inside the mounting tube (403), one end of the stirring shaft (5) extends through the mounting tube (403) to the outside of the cleaning barrel (4) and is fixed with a second gear (502), a second rack (105) is vertically fixed on the inner wall of the bottom end of the washing tank (1), the second rack (105) is meshed with the second gear (502), and the first rack (106) and the second rack (105) are respectively located on both sides of the second gear (502).

7. The preparation device of rod-shaped boehmite powder according to claim 1, characterized in that: A plurality of stirring branches (501) are fixed to the outside of the stirring shaft (5), and the stirring branches (501) are evenly distributed along the axial direction of the stirring shaft (5).

8. The preparation device of rod-shaped boehmite powder according to claim 1, characterized in that: A notch is provided on one side of the water washing tank (1) close to the inlet and outlet of the cleaning cylinder (4), and an inclined material guiding curved plate (103) is installed on the notch.

9. A method for preparing rod-shaped boehmite powder, applied to the preparation device for rod-shaped boehmite powder according to claims 1-8, characterized in that: The following steps are involved: S1: adding aluminum chloride aqueous solution and urea into a first mixing kettle for mixing and stirring, and aging at a certain temperature to obtain material A; S2: adding alumina and water into a second mixing kettle to obtain alumina slurry, adjusting the pH value with H2SO4, and obtaining material B; S3: mixing the material A of step 1 and the material B of step 2 evenly and placing them in a hydrothermal reactor for hydrothermal reaction; S4: The product after the hydrothermal reaction is cooled, filtered through a centrifugal filter, washed through a washing device, and finally dried through a dryer to obtain a finished product, which is then packaged.

Images