Nickel hydroxide preparation device

Abstract

The invention discloses a device for preparing nickel hydroxide, which comprises a reaction kettle, a stirring device, a thickener and a dispersing device, the upper end of the reaction kettle is provided with a material return port and an alkali liquor inlet, the side wall of the reaction kettle is also provided with an overflow port, and the overflow port is arranged close to the upper end of the reaction kettle; the stirring device is arranged in the reaction kettle and is used for stirring materials; the thickener is provided with an inlet and an outlet, the inlet is connected with the overflow port, the outlet is communicated with the material return port, and the thickener is used for conveying materials into the reaction kettle from the material return port after the materials are thickened; the dispersing device is arranged in the reaction kettle, corresponds to the alkali liquor inlet and is used for dispersing alkali liquor entering the reaction kettle from the alkali liquor inlet. According to the reaction kettle, all parts of the reaction kettle can react, so that the reaction is more uniform, the uniform particle size of the spherical nickel hydroxide is ensured, and the quality of the nickel hydroxide is improved.

Description

Technical Field

[0001] The invention relates to the technical field of nickel hydroxide preparation, and in particular to a device for preparing nickel hydroxide. Background Art

[0002] Nickel hydroxide plays a pivotal role in modern industry. Its excellent electrochemical properties and high catalytic activity make it an indispensable basic raw material in the fields of battery materials, catalyst preparation, electroplating technology, etc.

[0003] Patent CN202246883U discloses an electrochemical-chemical mixed oxidation tank for pre-oxidizing spherical nickel hydroxide. It includes a tank body, cavities are arranged on both sides of the tank body, nano-ceramic ion membranes are arranged at the connection between the tank body and the cavities on both sides, positive and negative electrodes are respectively installed in the cavities on both sides; multiple electric heaters are installed in the tank body, and resistance wires are installed in the electric heaters.

[0004] However, the liquid alkali entering the tank in the above prior art cannot be dispersed in time, resulting in the formation of spherical nickel hydroxide particles of different sizes, which affects the quality of nickel hydroxide. Summary of the invention

[0005] The purpose of the present invention is to overcome the above technical deficiencies and propose a device for preparing nickel hydroxide to solve the technical problem that the liquid alkali in the prior art cannot be dispersed in time, resulting in the formation of spherical nickel hydroxide particles of different sizes, which affects the quality of nickel hydroxide.

[0006] In order to achieve the above technical objectives, the present invention adopts the following technical solutions: The present invention provides a device for preparing nickel hydroxide, comprising: A reactor, wherein a feed return port and an alkali solution inlet are provided at the upper end of the reactor, and an overflow port is also provided on the side wall of the reactor, and the overflow port is arranged close to the upper end of the reactor; A stirring device, arranged in the reaction kettle, for stirring the material; a thickener, wherein the thickener is provided with an inlet and an outlet, wherein the inlet is connected to the overflow port, and the outlet is connected to the return port, and the thickener is used to transport the material from the return port to the reactor after the material is thickened; and A dispersion device is arranged in the reactor and corresponds to the alkali solution inlet. The dispersion device is used to disperse the alkali solution entering the reactor from the alkali solution inlet.

[0007] In some embodiments, the stirring device includes a folding-blade stirring paddle, a propulsion stirring paddle and a driving member. The folding-blade stirring paddle and the propulsion stirring paddle are both rotatably installed in the reactor along an axis in the vertical direction, and the propulsion stirring paddle is arranged close to the bottom of the reactor, the folding-blade stirring paddle is located above the propulsion stirring paddle, the propulsion stirring paddle is used to push the slurry downward, and the folding-blade stirring paddle is used to disperse the slurry radially and axially, and the driving member is connected to the folding-blade stirring paddle and the propulsion stirring paddle to drive them to rotate.

[0008] In some embodiments, the inclination angle of the blades of the folding blade impeller is 25°-30°.

[0009] In some embodiments, the bottom of the reactor is conical.

[0010] In some embodiments, the dispersion device includes a dispersion disk, which is rotatably installed in the reactor, and the dispersion disk is provided with a plurality of dispersion holes spaced along its circumference, and the dispersion holes are located below the alkali solution inlet.

[0011] In some embodiments, the dispersion disk is coaxially arranged with a driving member of the stirring device, and the driving member is connected to the dispersion disk to drive the dispersion disk to rotate.

[0012] In some embodiments, the dispersion disk includes a mounting seat, a plurality of connecting beams and a dispersion ring, the mounting seat is mounted on the driving member, the dispersion ring is sleeved on the outer periphery of the mounting seat and coaxially arranged with the mounting seat, the dispersion ring is connected to the mounting seat through a plurality of connecting beams, wherein the dispersion ring corresponds to the alkali solution inlet, and the dispersion hole is located on the dispersion ring.

[0013] In some embodiments, the device for preparing nickel hydroxide also includes a plurality of spoilers and a pH detection device, wherein the plurality of spoilers are arranged at intervals along the circumference of the reactor on the inner wall of the reactor, and the pH detection device is arranged in the reactor for detecting the pH value of the slurry.

[0014] In some embodiments, the upper end of the reactor is also provided with an ammonia water inlet and a nickel sulfate inlet.

[0015] In some embodiments, a reactor jacket is provided on the periphery of the reactor, a liquid is filled between the reactor jacket and the reactor, and a heating device is provided between the reactor jacket and the reactor, and the heating device is used to heat the liquid.

[0016] Compared with the prior art, the device for preparing nickel hydroxide provided by the present invention comprises the following steps: the reactor is used for reacting nickel sulfate with alkali solution to generate nickel hydroxide; the concentrator is used for concentrating the material and conveying the concentrated material back to the reactor to ensure that the nickel hydroxide content in the reactor is always stable within a fixed range; the generated spherical nickel hydroxide has a smooth surface and uniform size; the dispersion device is used for dispersing the alkali solution; the alkali solution can be dispersed to various places of the reactor by the dispersion device, ensuring that the reaction can be carried out in various places of the reactor, which is conducive to a more uniform reaction, ensures that the spherical nickel hydroxide particles have a uniform size, and improves the quality of the nickel hydroxide.

[0017] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the preferred embodiments of the present invention are described in detail as follows with reference to the accompanying drawings. The specific implementation of the present invention is given in detail by the following embodiments and their accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of an embodiment of a device for preparing nickel hydroxide provided by the present invention; Figure 2 yes Figure 1 A top view of the middle dispersion disc; Figure 3 is a bottom cross-sectional view of another embodiment of the device for preparing nickel hydroxide provided by the present invention; Figure 4 yes Figure 3 A partial cross-sectional view of an apparatus for preparing nickel hydroxide.

[0019] Description of reference numerals: 1-reactor, 11-return port, 12-alkali solution inlet, 13-overflow port, 14-ammonia water inlet, 15-nickel sulfate inlet, 2-stirring device, 21-folding blade stirring paddle, 22-propulsion stirring paddle, 23-rotating shaft, 24-driving motor, 3-dispersing device, 31-dispersing disk, 311-mounting seat, 312-connecting beam, 313-dispersing ring, 314-dispersing hole, 32-dispersing box, 321-dispersing port, 33-stop group, 331-stop plate, 4-jacket, 5-spoiler. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0021] In order to solve the technical problem that the liquid alkali in the prior art cannot be dispersed in time, resulting in different sizes of spherical nickel hydroxide particles formed, which affects the quality of nickel hydroxide, the present invention provides a device for preparing nickel hydroxide, which can ensure that the reaction can be carried out everywhere in the reactor, which is conducive to a more uniform reaction, ensures that the size of the spherical nickel hydroxide particles is consistent, and improves the quality of the nickel hydroxide.

[0022] See also Figure 1 , Figure 1 Schematic diagram of the structure of a device for preparing nickel hydroxide in one embodiment of the present invention.

[0023] The present invention provides a device for preparing nickel hydroxide, comprising a reactor 1, a stirring device 2, a concentrator and a dispersing device 3, wherein a return port 11 and an alkali solution inlet 12 are provided at the upper end of the reactor 1, and an overflow port 13 is further provided on the side wall of the reactor 1, wherein the overflow port 13 is arranged close to the upper end of the reactor 1; the stirring device 2 is arranged in the reactor 1, and is used for stirring the material; the concentrator is provided with an inlet and an outlet, wherein the inlet is connected to the overflow port 13, and the outlet is connected to the return port 11, and the concentrator is used for concentrating the material and transporting it from the return port 11 to the reactor 1; the dispersing device 3 is arranged in the reactor 1, and is arranged corresponding to the alkali solution inlet 12, and is used for dispersing the alkali solution entering the reactor 1 from the alkali solution inlet 12.

[0024] In this example, see Figure 1 The reactor 1 is used for reacting nickel sulfate with alkali solution to generate nickel hydroxide. The thickener is used for thickening the material and conveying the thickened material back to the reactor 1 to ensure that the nickel hydroxide content in the reactor 1 is always stable within a fixed range. The generated spherical nickel hydroxide has a smooth surface and uniform size. The dispersion device 3 is used for dispersing the alkali solution. The dispersion device 3 can disperse the alkali solution to various places in the reactor 1 to ensure that the reaction can be carried out in various places in the reactor 1, which is conducive to a more uniform reaction, ensures that the spherical nickel hydroxide particles have a uniform size, and improves the quality of the nickel hydroxide.

[0025] In one embodiment, see Figure 1The stirring device 2 includes a folding blade stirring paddle 21, a propulsion stirring paddle 22 and a driving member. The folding blade stirring paddle 21 and the propulsion stirring paddle 22 are both rotatably installed in the reactor 1 along the axis in the vertical direction, and the propulsion stirring paddle 22 is arranged close to the bottom of the reactor 1, the folding blade stirring paddle 21 is located above the propulsion stirring paddle 22, the propulsion stirring paddle 22 is used to push the slurry downward, and the folding blade stirring paddle 21 is used to disperse the slurry radially and axially. The driving member is connected to the folding blade stirring paddle 21 and the propulsion stirring paddle 22 to drive them to rotate.

[0026] In this embodiment, the folding blade stirring paddle 21 and the propulsion stirring paddle 22 are arranged at intervals from top to bottom, the folding blade stirring paddle 21 can push the material in the radial and axial directions, and the propulsion stirring paddle 22 can push the material downward. When in use, the driving member drives the folding blade stirring paddle 21 and the propulsion stirring paddle 22 to rotate, and the propulsion stirring paddle 22 pushes the material from top to bottom, pushing the material between the folding blade stirring paddle 21 and the propulsion stirring paddle 22 to the bottom of the reactor 1, and under the action of the bottom of the reactor 1, the material returns to the top of the propulsion stirring paddle 22 in a cylindrical spiral form along the wall, forming an axial flow. When the propulsion stirring paddle 22 stirs, the turbulence of the fluid is not violent, but the circulation volume is large, so the material can circulate in the reactor 1 during stirring, and the up and down tumbling effect is good, and the nickel hydroxide precipitate at the bottom can be well sucked up to reduce the solid content. The stirring blades of the folding blade stirring paddle 21 are arranged at an angle, so that the mixing degree of the radial flow and the axial flow can be balanced, so that the stirring is more uniform and the effect is better.

[0027] It should be noted that the folding blade stirring paddle 21 and the propulsion stirring paddle 22 are both prior art and will not be described in detail herein.

[0028] Specifically, the driving member includes a rotating shaft 23 and a driving motor 24. The rotating shaft 23 is rotatably installed on the reactor 1 along an axis in the vertical direction, and the lower end of the rotating shaft 23 extends into the reactor 1. The folding blade stirring paddle 21 and the propulsion stirring paddle 22 are installed at intervals from top to bottom on the part of the rotating shaft 23 located in the reactor 1. The driving motor 24 is located on the upper side of the reactor 1, and the main shaft of the driving motor 24 is connected to the upper end of the rotating shaft 23 so as to drive the rotating shaft 23 to rotate through the driving motor 24.

[0029] In this embodiment, the inclination angle of the blades of the folding blade stirring paddle 21 is 25°-30°. Such a setting can balance the mixing degree of the radial flow and the axial flow, making the stirring more uniform and having a better effect.

[0030] In one embodiment, see Figure 1 The bottom of the reactor 1 is conical.

[0031] In this embodiment, the upper end of the reactor 1 is cylindrical, and the lower end is conical, and the propeller stirring paddle 22 corresponds to the conical part of the reactor 1. Such a configuration can better cooperate with the propeller stirring paddle 22, return the material at the bottom to the top of the propeller stirring paddle 22, and further improve the stirring effect.

[0032] In one embodiment, see Figure 1 and Figure 2 The dispersion device 3 includes a dispersion disk 31, which is rotatably installed in the reactor 1. The dispersion disk 31 is provided with a plurality of dispersion holes 314 spaced apart along its circumference, and the dispersion holes 314 are located below the alkali solution inlet 12.

[0033] In this embodiment, the dispersion disk 31 is rotatably installed in the reactor 1 along the axis in the vertical direction. The dispersion disk 31 is coaxially arranged with the reactor 1. The dispersion disk 31 is penetrated by a plurality of dispersion holes 314. The plurality of dispersion holes 314 are evenly arranged along the circumference of the dispersion disk 31. The distance from the dispersion holes 314 to the center of the dispersion disk 31 is the same as the distance from the alkali solution inlet 12 to the axis of the reactor 1, so that the dispersion holes 314 can correspond to the alkali solution inlet 12. When the dispersion disk 31 rotates, the alkali solution can be broken up, so that the alkali solution is dispersed to various parts of the reactor 1.

[0034] In one embodiment, see Figure 1 The dispersion disk 31 is coaxially arranged with the driving member of the stirring device 2, and the driving member is connected to the dispersion disk 31 to drive the dispersion disk 31 to rotate.

[0035] In this embodiment, there is no limitation on the form of driving the dispersion disk 31. A driving device may be provided to drive the dispersion disk 31 to rotate. Alternatively, the dispersion disk 31 may be installed on the rotating shaft 23, and the rotating shaft 23 and the dispersion disk 31 may be driven to rotate by the driving motor 24. Such a configuration can reduce the number of driving devices and reduce costs.

[0036] In one embodiment, see Figure 2The dispersion disk 31 includes a mounting seat 311, a plurality of connecting beams 312 and a dispersion ring 313. The mounting seat 311 is installed on the driving member. The dispersion ring 313 is sleeved on the outer periphery of the mounting seat 311 and is coaxially arranged with the mounting seat 311. The dispersion ring 313 is connected to the mounting seat 311 through a plurality of connecting beams 312, wherein the dispersion ring 313 corresponds to the alkali solution inlet 12, and the dispersion hole 314 is located in the dispersion ring 313.

[0037] In this embodiment, in order to reduce the volume of the dispersion disk 31 and avoid interfering with the entry of other materials, the dispersion disk 31 is arranged in an annular shape as a whole, the mounting seat 311 is installed on the rotating shaft 23, and a plurality of connecting beams 312 are arranged at intervals along the circumference of the mounting seat 311, and one end of each connecting beam 312 is connected to the mounting seat 311. The dispersion ring 313 is sleeved on the outer periphery of the mounting seat 311 and is coaxially arranged with the mounting seat 311. The dispersion ring 313 is connected to the other end of the connecting beam 312. Such a configuration can avoid interfering with other materials.

[0038] In another embodiment, see Figure 3 and Figure 4 The dispersion device 3 includes a dispersion box 32 and a plurality of stop groups 33. The dispersion box 32 is arranged in a circular shape and is rotatably installed in the reactor 1 along an axis in the vertical direction. An opening is arranged on the upper side of the dispersion box 32, and the opening corresponds to the alkali solution inlet 12. A plurality of dispersion ports 321 are arranged on the circumference of the dispersion box 32, and the plurality of dispersion ports 321 are arranged at intervals along the circumference of the dispersion box 32. The plurality of stop groups 33 are arranged in the reactor 1 and are arranged at intervals along the circumference of the dispersion box 32. Each of the stop groups 33 includes a plurality of stop plates 331, and the plurality of stop plates 331 are arranged at intervals along the direction close to the dispersion box 32, and the plurality of stop paper boards are arranged in sequence along the circumference of the dispersion box 32.

[0039] Specifically, during use, the alkali solution is transported from the alkali solution inlet 12 to the dispersion box 32, and the dispersion box 32 rotates to throw the alkali solution out of the dispersion box 32 from the dispersion port 321. The alkali solution thrown out of the dispersion box 32 will splash on different stop plates 331, and finally fall from the stop plate 331 into the material below. Since the distance from the stop plate 331 to the dispersion box 32 is different, the splashed alkali solution can be dispersed to various places of the reactor 1, thereby achieving the purpose of dispersion.

[0040] For further information, see Figure 3 and Figure 4The lengths of the plurality of stop plates 331 increase in sequence in a direction away from the dispersion box 32 , and the upper ends of the plurality of stop plates 331 are flush with each other.

[0041] For further information, see Figure 3 and Figure 4 The dispersion box 32 is coaxially arranged with the driving member of the stirring device 2, and the driving member is connected to the dispersion box 32 to drive the dispersion box 32 to rotate.

[0042] In one embodiment, the device for preparing nickel hydroxide also includes a plurality of spoilers 5 and a pH detection device. The plurality of spoilers 5 are arranged at intervals along the circumference of the reactor 1 on the inner wall of the reactor 1. The pH detection device is arranged in the reactor 1 to detect the pH value of the slurry.

[0043] In this embodiment, in order to improve the turbulence effect, the side wall of the reactor 1 is further provided with a plurality of spoilers 5. In order to be able to detect the pH value of the material in the reactor 1 in real time, the reactor 1 is also provided with the pH detection device.

[0044] In one embodiment, see Figure 1 The upper end of the reactor is also provided with an ammonia water inlet 14 and a nickel sulfate inlet 15.

[0045] In this embodiment, the nickel sulfate inlet 15 , the alkali solution inlet 12 and the ammonia water inlet 14 are arranged at intervals along a direction close to the middle of the reactor 1 .

[0046] In one embodiment, see Figure 1 A reactor jacket 4 is provided on the outer periphery of the reactor 1, and a liquid is filled between the reactor jacket 4 and the reactor 1. A heating device is also provided between the reactor jacket 4 and the reactor 1, and the heating device is used to heat the liquid.

[0047] In order to better understand the present invention, the following Figures 1 to 4 The technical solution of the present invention is described in detail: When used specifically, the nickel sulfate inlet 15, the alkali solution inlet 12 and the ammonia water inlet 14 are respectively injected into the reactor 1, and the three react to generate nickel hydroxide precipitation. The driving motor 24 drives the dispersion plate 31, the folding blade stirring paddle 21 and the propulsion stirring paddle 22 to rotate through the rotating shaft 23. The dispersion plate 31 can disperse the alkali solution to various places in the reactor 1, and the propulsion stirring paddle 22 pushes the material from top to bottom, so that the material between the folding blade stirring paddle 21 and the propulsion stirring paddle 22 is It is pushed to the bottom of the reactor 1, and under the action of the bottom of the reactor 1, it returns to the top of the propulsion stirring paddle 22 in a cylindrical spiral form along the wall to form an axial flow. The turbulence of the fluid is not violent when the propulsion stirring paddle 22 is stirring, but the circulation volume is large, so the material can circulate in the reactor 1 during stirring, and the up and down tumbling effect is good, which can well absorb the nickel hydroxide precipitate at the bottom and reduce the solid content. The stirring blades of the folding blade stirring paddle 21 are inclined, so as to balance the mixing degree of the radial flow and the axial flow, so that the stirring is more uniform and the effect is better.

[0048] The specific implementation of the present invention described above does not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A device for preparing nickel hydroxide, characterized in that: It includes: A reactor, wherein a feed return port and an alkali solution inlet are provided at the upper end of the reactor, and an overflow port is also provided on the side wall of the reactor, and the overflow port is arranged close to the upper end of the reactor; A stirring device, arranged in the reaction kettle, for stirring the material; A thickener, wherein the thickener is provided with an inlet and an outlet, wherein the inlet is connected to the overflow port, and the outlet is connected to the return port, and the thickener is used to transport the material from the return port to the reactor after the material is thickened; as well as A dispersion device is arranged in the reactor and corresponds to the alkali solution inlet. The dispersion device is used to disperse the alkali solution entering the reactor from the alkali solution inlet.

2. The device for preparing nickel hydroxide according to claim 1, characterized in that: The stirring device includes a folding-blade stirring paddle, a propulsion stirring paddle and a driving member. The folding-blade stirring paddle and the propulsion stirring paddle are both rotatably installed in the reactor along an axis in the vertical direction, and the propulsion stirring paddle is arranged close to the bottom of the reactor, the folding-blade stirring paddle is located above the propulsion stirring paddle, the propulsion stirring paddle is used to push the slurry downward, and the folding-blade stirring paddle is used to disperse the slurry radially and axially. The driving member is connected to the folding-blade stirring paddle and the propulsion stirring paddle to drive them to rotate.

3. The device for preparing nickel hydroxide according to claim 2, characterized in that: The inclination angle of the blades of the folding blade stirring paddle is 25°-30°.

4. The device for preparing nickel hydroxide according to claim 2, characterized in that: The bottom of the reactor is arranged in a conical shape.

5. The device for preparing nickel hydroxide according to claim 1, characterized in that: The dispersion device comprises a dispersion disk, which is rotatably installed in the reaction kettle. The dispersion disk is provided with a plurality of dispersion holes spaced along its circumference, and the dispersion holes are located below the alkali solution inlet.

6. The device for preparing nickel hydroxide according to claim 5, characterized in that: The dispersion disk is coaxially arranged with a driving member of the stirring device, and the driving member is connected with the dispersion disk to drive the dispersion disk to rotate.

7. The device for preparing nickel hydroxide according to claim 6, characterized in that: The dispersion disk includes a mounting seat, a plurality of connecting beams and a dispersion ring, wherein the mounting seat is mounted on the driving member, the dispersion ring is sleeved on the outer periphery of the mounting seat and is coaxially arranged with the mounting seat, and the dispersion ring is connected to the mounting seat through a plurality of connecting beams, wherein the dispersion ring corresponds to the alkali solution inlet, and the dispersion hole is located on the dispersion ring.

8. The device for preparing nickel hydroxide according to claim 1, characterized in that: The device for preparing nickel hydroxide also includes a plurality of spoilers and a pH detection device. The plurality of spoilers are arranged at intervals along the circumference of the reactor on the inner wall of the reactor. The pH detection device is arranged in the reactor to detect the pH value of the slurry.

9. The device for preparing nickel hydroxide according to claim 1, characterized in that: The upper end of the reactor is also provided with an ammonia water inlet and a nickel sulfate inlet.

10. The device for preparing nickel hydroxide according to claim 1, characterized in that: A reactor jacket is arranged on the outer periphery of the reactor, a liquid is filled between the reactor jacket and the reactor, and a heating device is arranged between the reactor jacket and the reactor, and the heating device is used to heat the liquid.

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