A precursor system backup multi-liquid phase mixing process and device

Abstract

The present invention discloses a precursor system standby multi-liquid phase mixing process, comprising the following steps: S1, preparing nickel sulfate solution, cobalt sulfate solution, manganese sulfate solution, and sodium hydroxide solution: weighing nickel sulfate hexahydrate, cobalt sulfate heptahydrate, and manganese sulfate monohydrate solids, placing the weighed solids into respective preparation tanks, adding a certain proportion of water and stirring to prepare a salt solution; placing sodium hydroxide solution into a preparation tank, adding a certain proportion of water and stirring to prepare an alkaline solution; placing the multiple salt solutions into salt tanks, and placing the alkaline solution into an alkaline tank; S2, using a magnetic pump to feed the nickel sulfate, cobalt sulfate, and manganese sulfate salt solutions in the multiple salt tanks, the alkaline solution in the alkaline storage tank, and the reactor bottom liquid into a multi-effect mixer for mixing; S3: passing the mixed solution through a homogenizer and then into the reactor, while simultaneously feeding an ammonia solution into the reactor. Compared with the prior art, the present invention can achieve continuous, rapid, and uniform mixing.

Description

Technical Field

[0001] The present invention relates to the field of mixing technology, in particular to a precursor system standby multi-liquid phase mixing process and device. Background Art

[0002] In the crystallization process of the precursor, mixing plays an extremely important role. Through mixing, the crystal particles in the crystallization system can be evenly suspended in the liquid, so that the solute ions can be transferred to the crystal surface more quickly, increasing the contact area between the solute ions and the crystal, promoting the growth and development of the crystal, and promoting heat transfer in the crystallization process.

[0003] Therefore, the speed and uniformity of mixing are important factors in determining whether well-developed crystal particles with uniform particle size and morphology can be obtained.

[0004] In the current precursor production process, salt solution and alkaline solution usually enter the reactor separately and then are stirred by the agitator in the reactor. Because the reactor is usually large in size and the velocity gradient is different at different places, the solution is unevenly dispersed, the mixing time is long, and the crystallization stability is poor.

[0005] In view of this, the inventors of the present application have conducted in-depth research and obtained a precursor system backup multi-liquid phase mixing process and device. Summary of the Invention

[0006] The object of the present invention is to provide a precursor system standby multi-liquid phase mixing process and device, which can achieve continuous, rapid and uniform mixing.

[0007] The above technical objectives of the present invention are achieved through the following technical solutions:

[0008] A precursor system backup multi-liquid phase mixing process, comprising the steps of:

[0009] S1. Preparation of nickel sulfate solution, cobalt sulfate solution, manganese sulfate solution, and sodium hydroxide solution: Weigh nickel sulfate hexahydrate, cobalt sulfate heptahydrate, and manganese sulfate monohydrate solids, place the weighed solids into respective preparation tanks, add a certain proportion of water and stir to prepare a 2 mol / L salt solution, place 10 mol / L sodium hydroxide solution into a preparation tank, add a certain proportion of water and stir to prepare a 4 mol / L alkaline solution, add the various salt solutions into the salt solution tank, and add the alkaline solution into the alkaline solution tank;

[0010] S2. The nickel sulfate, cobalt sulfate, and manganese sulfate solutions in the multiple salt liquid tanks, the alkali solution in the alkali storage tank, and the reactor bottom liquid are pumped into a multi-effect mixer using a magnetic pump for mixing;

[0011] S3: The mixed solution is passed through a homogenizer and then fed into a reactor. At the same time, a 2-10 mol / L ammonia solution is fed into the reactor to perform a co-precipitation reaction.

[0012] In a preferred embodiment, the flow ratio of nickel sulfate, cobalt sulfate, manganese sulfate solution, sodium hydroxide solution and reactor bottom liquid fed into the multi-effect mixer in step S2 is 5:2:3:10:10, the speed range of the multi-effect mixer is controlled between 0.6-4m / s, and the working pressure is controlled to be 0.1-0.3Mpa.

[0013] In a preferred embodiment, the temperature of the reactor in step S3 is controlled at 50° C., and the pH value is controlled according to the concentration of ammonia water in the reactor.

[0014] A precursor system backup multi-liquid phase mixing device is applied to the precursor system backup multi-liquid phase mixing process, including an alkali liquid tank, multiple salt liquid tanks, a multi-effect mixer and a reactor, the multi-effect mixer includes a primary mixing chamber, an intermediate mixing chamber and an outflow mixing chamber connected in sequence, the primary mixing chamber is provided with multiple inlets, and a primary collision mixing chamber, a primary drainage channel and a primary diffusion mixing chamber are provided inside, the multiple inlets are connected to the primary collision mixing chamber, one end of the primary drainage channel is connected to the primary collision mixing chamber, and the other end is connected to the primary diffusion mixing chamber, The intermediate mixing chamber is provided with multiple flow channels, secondary collision mixing chambers, intermediate drainage channels and secondary diffusion mixing chambers. The multiple flow channels are distributed in a ring, and the two ends are respectively connected to the primary diffusion mixing chamber and the secondary collision mixing chamber. One end of the intermediate drainage channel is connected to the secondary collision mixing chamber, and the other end is connected to the secondary diffusion mixing chamber. The outflow mixing chamber is provided with a rectifying chamber and an outlet. The rectifying chamber is connected to the secondary diffusion mixing chamber and the outlet, and the outlet is connected to the reactor. The alkali liquid tank, multiple salt liquid tanks and the reactor are connected to the multiple inlets.

[0015] In a preferred embodiment, the areas between the plurality of flow channel inlets are provided with arc-shaped recesses.

[0016] In a preferred embodiment, the primary mixing chamber, the intermediate mixing chamber and the outflow mixing chamber are connected by bolts.

[0017] In a preferred embodiment, an opening is provided on the side wall of the intermediate mixing chamber, and a plug is provided in the opening.

[0018] In a preferred embodiment, an electric ball valve, a mass flow meter and an electromagnetic proportional valve are provided between the alkali liquid tank and the multiple salt liquid tanks and the inlet.

[0019] In a preferred embodiment, a reflux supply system is provided between the reaction kettle and the outlet, and a magnetic pump is provided in the reflux supply system.

[0020] In a preferred embodiment, a spoiler is provided in the primary drainage channel and the intermediate drainage channel. The spoiler is made of non-metallic material. The spoiler includes an elastic bracket and a flow wrapping wire. The flow wrapping wire is wound around the elastic bracket, and the elastic bracket is supported in the primary drainage channel and the intermediate drainage channel.

[0021] In a preferred embodiment, the elastic support includes a plurality of legs, one end of the plurality of legs is provided with an arc segment, the arc segments of the plurality of legs are connected to each other, and the plurality of legs are distributed in a ring.

[0022] In a preferred embodiment, the side of the support leg is provided with an anti-slip foot, the flow wire is wrapped around the support leg, the anti-slip foot includes a first sleeve, a second sleeve, a push spring, a fixed seat and multiple anti-slip support feet, one end of the first sleeve is connected to the support leg, and the other end is inserted into the second sleeve, the push spring is sleeved on the first sleeve, one end of which pushes against the support leg, and the other end pushes against the end of the second sleeve, the fixed seat and multiple anti-slip support feet are arranged in the first sleeve and the second sleeve, the fixed seat is connected to the first sleeve, the anti-slip support leg includes a flexible connecting section and a main body, the flexible connecting section connects the fixed seat and the main body, an anti-slip sheet is provided on the main body, the multiple anti-slip support feet are evenly distributed around the circumference, and the anti-slip sheet is located in the space formed by the multiple anti-slip support feet.

[0023] Compared with the prior art, the present invention has the following advantages: through its process flow, it can achieve precise proportioning and circulation homogenization control in the precursor preparation process, and improve the solid concentration in the reactor. Specifically: it directly pumps the alkaline solution and various salt solutions into the multi-effect mixer, then passes them into the homogenizer and then passes them into the reactor with ammonia water for co-precipitation reaction. While ensuring production quality, it skips the stirring and mixing of the salt solution, greatly increasing production efficiency. At the same time, the new mixing process can achieve precise proportioning in the precursor preparation process, and through the reactor bottom liquid reflux system, the bottom liquid in the reactor is fully mixed with multiple groups of salt solutions and alkaline solutions, achieving circulation homogenization control in the precursor preparation process and improving the solid concentration in the reactor. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The present invention relates to a process flow chart of a precursor system standby multi-liquid phase mixing process.

[0025] Figure 2 The present invention is a structural schematic diagram of a precursor system standby multi-liquid phase mixing device.

[0026] Figure 3 The present invention is a front view of a multi-effect mixer of a precursor system standby multi-liquid phase mixing device.

[0027] Figure 4 The present invention relates to a top view of a multi-effect mixer of a precursor system standby multi-liquid phase mixing device.

[0028] Figure 5 The present invention is a schematic diagram of the internal structure of a multi-effect mixer of a precursor system standby multi-liquid phase mixing device.

[0029] Figure 6 The present invention is a schematic structural diagram of a spoiler of a precursor system backup multi-liquid phase mixing device.

[0030] Figure 7 The present invention relates to a schematic structural diagram of an anti-skid foot of a spoiler of a precursor system backup multi-liquid phase mixing device.

[0031] Figure 8 The present invention relates to a schematic structural diagram of a spoiler of a precursor system backup multi-liquid phase mixing device with a second sleeve removed, showing an anti-skid foot.

[0032] Figure 9 The present invention relates to a schematic structural diagram of a spoiler of a precursor system backup multi-liquid phase mixing device with a first sleeve and a second sleeve removed.

[0033] Figure 10 The present invention relates to a mixing effect table of a precursor system standby multi-liquid phase mixing device.

[0034] In the picture

[0035] Alkali liquid tank 1; brine tank 2; reactor 3; ammonia inlet circuit 4; electric ball valve 5; mass flowmeter 6; electromagnetic proportional valve 7; reflux supply system 8; magnetic pump 9; multi-effect mixer 10; primary mixing chamber 11; inlet 12; primary collision mixing chamber 13; primary discharge channel 14; primary diffusion mixing chamber 15; intermediate mixing chamber 16; arc-shaped depression 17; flow channel 18; secondary collision mixing chamber 19; intermediate discharge channel 20; secondary diffusion mixing chamber 21; plug 22; outflow mixing chamber 23; rectifying chamber 24; outlet 25; spoiler 26; elastic bracket 27; support leg 28; arc section 29; anti-slip foot 30; first sleeve 31; second sleeve 32; support spring 33; fixing seat 34; anti-slip support foot 35; flexible connecting section 36; body 37; anti-slip sheet 38; flow wrap 39; factory tap water pipeline 40. DETAILED DESCRIPTION

[0036] The present invention will be further described in detail below with reference to the accompanying drawings.

[0037] This specific embodiment is merely an explanation of the present invention and is not intended to limit the present invention. After reading this specification, those skilled in the art may make non-creative modifications to this embodiment as needed. However, as long as such modifications are within the scope of the claims of the present invention, they are protected by patent law.

[0038] Example 1

[0039] like Figure 1 As shown, a precursor system backup multi-liquid phase mixing process includes the following steps:

[0040] S1. Preparation of nickel sulfate solution, cobalt sulfate solution, manganese sulfate solution, and sodium hydroxide solution: Weigh nickel sulfate hexahydrate, cobalt sulfate heptahydrate, and manganese sulfate monohydrate solids, place the weighed solids into respective preparation tanks, add a certain proportion of water and stir to prepare a 2 mol / L salt solution, place 10 mol / L sodium hydroxide solution into a preparation tank, add a certain proportion of water and stir to prepare a 4 mol / L alkaline solution, add the various salt solutions into the salt solution tank, and add the alkaline solution into the alkaline solution tank;

[0041] S2. The nickel sulfate, cobalt sulfate, and manganese sulfate solutions in the multiple salt liquid tanks, the alkali solution in the alkali storage tank, and the reactor bottom liquid are pumped into a multi-effect mixer using a magnetic pump for mixing;

[0042] S3: The mixed solution is passed through a homogenizer and then fed into a reactor. At the same time, a 2-10 mol / L ammonia solution is fed into the reactor to perform a co-precipitation reaction.

[0043] Specifically, in step S2, the flow ratio of nickel sulfate, cobalt sulfate, manganese sulfate solution, sodium hydroxide solution and reactor bottom liquid fed into the multi-effect mixer is 5:2:3:10:10, the speed range of the feed into the multi-effect mixer is controlled between 0.6-4 m / s, and the working pressure is controlled to be 0.1-0.3 MPa.

[0044] Specifically, the temperature of the reactor in step S3 is controlled at 50° C., and the pH value is controlled according to the concentration of ammonia water in the reactor.

[0045] Through the above process flow, precise proportioning and circulation homogenization control are achieved in the precursor preparation process, thereby increasing the solid concentration in the reactor. Specifically, the alkaline solution and various salt solutions are directly pumped into the multi-effect mixer, then passed into the homogenizer and then into the reactor with ammonia water for co-precipitation reaction. While ensuring production quality, the stirring and mixing of the salt solution is skipped, greatly increasing production efficiency. At the same time, the new mixing process can achieve precise proportioning in the precursor preparation process, and the bottom liquid in the reactor is fully mixed with multiple groups of salt solutions and alkaline solutions through the reactor bottom liquid reflux system, thereby achieving circulation homogenization control in the precursor preparation process and increasing the solid concentration in the reactor.

[0046] Example 2

[0047] like Figures 1 to 5 As shown, a precursor system standby multi-liquid phase mixing device is applied to the precursor system standby multi-liquid phase mixing process, including an alkali liquid tank 1, multiple salt liquid tanks 2, a multi-effect mixer 10 and a reactor 3, the multi-effect mixer 10 includes a primary mixing chamber 11, an intermediate mixing chamber 16 and an outflow mixing chamber 23 connected in sequence, the primary mixing chamber 11 is provided with multiple inlets 12, and a primary collision mixing chamber 13, a primary drainage channel 14 and a primary diffusion mixing chamber 15 are provided inside, the multiple inlets 12 are connected to the primary collision mixing chamber 13, one end of the primary drainage channel 14 is connected to the primary collision mixing chamber 13, and the other end is connected to the primary diffusion mixing chamber 15, the intermediate mixing chamber 16 and the outflow mixing chamber 23 are connected in sequence, the primary mixing chamber 11 is provided with multiple inlets 12, and a primary collision mixing chamber 13, a primary drainage channel 14 and a primary diffusion mixing chamber 15 are provided inside, the multiple inlets 12 are connected to the primary collision mixing chamber 13, the primary drainage channel 14 is connected to the primary collision mixing chamber 13 at one end ... The intermediate mixing chamber 16 is provided with multiple flow channels 18, secondary collision mixing chambers 19, intermediate drainage channels 20 and secondary diffusion mixing chambers 21. The multiple flow channels 18 are distributed in a ring, and the two ends are respectively connected to the primary diffusion mixing chamber 15 and the secondary collision mixing chamber 19. One end of the intermediate drainage channel 20 is connected to the secondary collision mixing chamber 19, and the other end is connected to the secondary diffusion mixing chamber 21. The outflow mixing chamber 23 is provided with a rectifying chamber 24 and an outlet 25. The rectifying chamber 24 is connected to the secondary diffusion mixing chamber 21 and the outlet 25. The outlet 25 is connected to the reactor 3. The alkali liquid tank 1, multiple salt liquid tanks 2 and the reactor 3 are connected to the multiple inlets 12.

[0048] The precursor preparation standby multi-liquid phase mixing device of the present embodiment has the following advantages: (1) it directly pumps the alkaline solution and the salt solution into the multi-effect mixer 10, and then introduces them into the reactor 3 with ammonia water for co-precipitation reaction, while ensuring the production quality, skipping the salt solution stirring and mixing, greatly improving the production efficiency; (2) it can achieve accurate proportioning in the precursor preparation process, and fully mix the bottom liquid, salt solution and alkaline solution in the reactor 3 through the reflux supply system 8, realizing the circulation homogenization control in the precursor preparation process, and improving the solid in the reactor 3. concentration; (3) The multi-effect mixer 10 enables the multiphase fluid to achieve multiple collision mixing, vortex mixing and diffusion mixing in the same equipment unit through the primary mixing chamber 11, the intermediate mixing chamber 16 and the outflow mixing chamber 23, thereby achieving rapid and uniform mixing of multiple solutions; (4) The equipment adopts a continuous tubular structure, and each group of salt solution or alkaline solution is equipped with a closed-loop flow regulation, which can control the crystallization rate and particle size by adjusting the mixing intensity to obtain a single crystal morphology; (5) The entire mixing system has good mixing uniformity, short mixing time, and can achieve continuous mixing, which greatly reduces the equipment space.

[0049] In this embodiment, three salt liquid tanks 2 are provided. When in operation, nickel sulfate salt solution, cobalt sulfate salt solution and manganese sulfate salt solution are respectively loaded therein. The alkali liquid tank 1 is loaded with sodium hydroxide alkali solution. An ammonia inlet loop 4 is provided on the reactor 3. The number of inlets 12 is set to five. The primary diffusion mixing chamber 15 and the secondary diffusion mixing chamber 21 are set to an inverted cone shape.

[0050] During operation, nickel sulfate solution, cobalt sulfate solution, manganese sulfate solution and sodium hydroxide alkaline solution are first introduced into the multi-effect mixer 10. After each solution enters through the inlet 12 on the primary mixing chamber 11 of the multi-effect mixer 10, it is led from its own flow channel 18 to the primary collision mixing chamber 13. Each solution collides at a speed greater than 2m / s. During the collision process, each solution penetrates each other and generates eddies, further promoting the mixing of each solution. There is a high turbulent kinetic energy distribution in the mixing chamber, strengthening the chaotic mixing effect and making the mixing more sufficient. Subsequently, the solution enters the primary diffusion mixing chamber 15, where the pressure increases and the solution diffuses to the intermediate mixing chamber 16.

[0051] The solution then enters the secondary collision mixing chamber 19 of the intermediate mixing chamber 16 along the four flow channels 18, and then enters the secondary diffusion mixing chamber 21, repeating the above mixing process. When it is necessary to further improve the uniformity of mixing, one or more intermediate mixing chambers 16 can be connected below the intermediate mixing chamber 16 to enhance the mixing effect.

[0052] Specifically, the solution passes through the secondary diffusion mixing chamber 21 of the intermediate mixing chamber 16 and then enters the rectifying chamber 24 of the outflow mixing chamber 23 . After rectification, the solution enters the reactor 3 through the outlet port 25 and the mixed liquid outlet loop.

[0053] During the above process, the bottom liquid in the reactor 3 is pumped into the multi-effect mixer 10 to further improve the homogenization effect and increase the solid concentration in the reactor 3. In addition, the ammonia inlet loop 4 feeds ammonia into the reactor 3 in real time to achieve a co-precipitation reaction. The above pipeline system realizes continuous transportation and continuous mixing.

[0054] After the mixing is completed, the corresponding valves are closed, and the factory tap water pipeline 40 allows water to flow into the pipeline and the mixer for cleaning so that the next work can be carried out.

[0055] To enhance the mixing effect, arc-shaped depressions 17 are provided in the areas between the inlets of the multiple flow channels 18. With the arc-shaped depressions 17, the solution, after flowing out of the primary diffusion mixing chamber 15, impacts the arc-shaped depressions 17. After impacting the arc-shaped depressions 17, the solution flows obliquely upward and downward, generating strong turbulence and eddies, stirring and mixing the solution and enhancing the back-mixing effect. Subsequently, the solution enters the intermediate mixing chamber 16 along the flow channels 18 surrounding the arc-shaped depressions 17.

[0056] Specifically, the primary mixing chamber 11, the intermediate mixing chamber 16 and the outflow mixing chamber 23 are connected by bolts, and O-rings are provided between the mixing chambers to achieve connection and sealing.

[0057] Specifically, an opening is provided on the side wall of the intermediate mixing chamber 16 , and a plug 22 is provided in the opening. The plug 22 is specifically configured as a hexagonal plug 22 .

[0058] In order to accurately control the flow rate of each group of solutions, an electric ball valve 5, a mass flow meter 6 and an electromagnetic proportional valve 7 are provided between the alkali liquid tank 1 and the multiple salt liquid tanks 2 and the inlet 12. Through such a setting, the mass accuracy can be controlled to be ≥5‰, thereby achieving accurate proportioning during the precursor configuration process.

[0059] Furthermore, a reflux supply system 8 is provided between the reactor 3 and the outlet 25, and a magnetic pump 9 is provided in the reflux supply system 8. Through the transportation of the magnetic pump 9, the bottom liquid in the reactor 3 is fully mixed with three groups of salt solutions and one group of alkaline solutions, thereby realizing circulation and homogenization control during the precursor preparation process and increasing the solid concentration in the reactor 3.

[0060] Furthermore, the primary drainage channel 14 and the intermediate drainage channel 20 are provided with a spoiler 26, and the spoiler 26 is made of non-metallic material, such as Figures 6 to 9 As shown, the spoiler 26 includes an elastic bracket 27 and a flow wrap filament 39, and the flow wrap filament 39 is wound on the elastic bracket 27. The elastic bracket 27 is supported in the primary drainage channel 14 and the intermediate drainage channel 20. The elastic supporting effect of the elastic bracket 27 is utilized to support the spoiler 26 in the primary drainage channel 14 and the intermediate drainage channel 20, thereby also realizing the support and positioning of the flow wrap filament 39. The flow wrap filament 39 has a good disrupting effect and can disperse the solution. When passing through the flow wrap filament 39, the solution is fully dispersed and mixed.

[0061] Specifically, the elastic bracket 27 includes a plurality of legs 28, one end of each of the plurality of legs 28 is provided with an arc segment 29, the arc segments 29 of the plurality of legs 28 are connected to each other, the plurality of legs 28 are distributed in a ring shape, and the arc segments 29 provide a good elastic support effect. After installation, the elasticity of the arc segments 29 enables the plurality of legs 28 to press against the side walls of the primary drainage channel 14 and the intermediate drainage channel 20.

[0062] In order to achieve stable positioning of the support legs 28, anti-slip feet 30 are provided on the sides of the support legs 28, and the flow wrap 39 is wrapped around the support legs 28. The provision of the anti-slip feet 30, on the one hand, enables the support legs 28 to be positioned more stably, and on the other hand, the anti-slip feet 30 prevent the flow wrap 39 from sliding, thereby ensuring that the flow wrap 39 can be stably positioned during operation and preventing it from falling off due to the impact of the liquid flow.

[0063] Furthermore, the anti-slip foot 30 includes a first sleeve 31, a second sleeve 32, a resisting spring 33, a fixing seat 34 and a plurality of anti-slip feet 35, one end of the first sleeve 31 is connected to the support leg 28, and the other end is inserted into the second sleeve 32, the resisting spring 33 is sleeved on the first sleeve 31, one end of which resists against the support leg 28, and the other end resists against the end of the second sleeve 32, the fixing seat 34 and the plurality of anti-slip feet 35 are arranged in the first sleeve 31 and the second sleeve 32, the fixing seat 34 is connected to the first sleeve 31, the anti-slip leg 28 includes a flexible connecting section 36 and a body 37, the flexible connecting section 36 connects the fixing seat 34 and the body 37, the body 37 is provided with an anti-slip sheet 38, the plurality of anti-slip feet 35 are evenly distributed around the circumference, and the anti-slip sheet 38 is located in the space formed by the plurality of anti-slip feet 35. The above structure is described as a state in which multiple anti-slip feet 35 are not installed. When not installed, the anti-slip feet 30 are in a columnar shape, which makes it easy for them to pass through the flow wire 39 and contact the side walls of the primary drainage channel 14 and the intermediate drainage channel 20. When the cam 28 is in the closed position, the second sleeve 32 is pressed against the anti-skid support legs 35 so that the anti-skid support legs 35 are pressed against the anti-skid support legs 35.

[0064] In this embodiment, the parts of the mass flow meter 6, the electromagnetic proportional valve 7 and the spoiler 26, etc., which are in contact with the liquid flow, are all made of non-metallic plastic materials to avoid corrosion and erosion of the mass flow meter 6 and the electromagnetic proportional valve 7 by the liquid flow, resulting in contamination of magnetic substances during the preparation of the precursor; at the same time, the conveying pipes in the multi-liquid phase mixing system are also all made of non-metallic plastic materials, and there is no magnetic substance contamination.

[0065] It should be noted that, in this document, relational terms such as first and second, etc., are used solely to distinguish one entity or operation from another, and do not necessarily require or imply any actual relationship or order between these entities or operations. Furthermore, the terms "include," "comprise," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or terminal device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or terminal device. Without further limitation, elements defined by the phrase "include..." or "comprising..." do not exclude the presence of additional elements in the process, method, article, or terminal device comprising the elements. Furthermore, in this document, "greater than," "less than," "exceeding," etc., are understood to exclude the number itself; "above," "below," "within," etc., are understood to include the number itself.

[0066] The above description of the embodiments is intended to facilitate understanding and application of the present invention by those skilled in the art. It is apparent that those skilled in the art can readily make various modifications to the embodiments and apply the general principles described herein to other embodiments without requiring creative effort. Therefore, the present invention is not limited to the above-described embodiments. Improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A precursor system with multiple liquid phase mixing process, characterized in that: Including steps: S1. Preparation of nickel sulfate solution, cobalt sulfate solution, manganese sulfate solution, and sodium hydroxide solution: Weigh nickel sulfate hexahydrate, cobalt sulfate heptahydrate, and manganese sulfate monohydrate solids, place the weighed solids into respective preparation tanks, add a certain proportion of water and stir to prepare a 2 mol / L salt solution, place 10 mol / L sodium hydroxide solution into a preparation tank, add a certain proportion of water and stir to prepare a 4 mol / L alkaline solution, add the various salt solutions into the salt solution tank, and add the alkaline solution into the alkaline solution tank; S2. The nickel sulfate, cobalt sulfate, and manganese sulfate solutions in the multiple salt liquid tanks, the alkali solution in the alkali storage tank, and the reactor bottom liquid are pumped into a multi-effect mixer using a magnetic pump for mixing; S3: The mixed solution is passed through a homogenizer and then fed into a reactor, and a 2-10 mol / L ammonia solution is simultaneously fed into the reactor to perform a coprecipitation reaction; The above steps are completed by using a precursor system standby multi-liquid phase mixing device, which includes an alkali liquid tank, multiple salt liquid tanks, a multi-effect mixer and a reactor. The multi-effect mixer includes a primary mixing chamber, an intermediate mixing chamber and an outflow mixing chamber connected in sequence. The primary mixing chamber is provided with multiple inlets, and a primary collision mixing chamber, a primary drainage channel and a primary diffusion mixing chamber are provided inside. The multiple inlets are connected to the primary collision mixing chamber, one end of the primary drainage channel is connected to the primary collision mixing chamber, and the other end is connected to the primary diffusion mixing chamber. The intermediate mixing chamber is provided with multiple flow channels, secondary collision mixing chambers, intermediate drainage channels and secondary diffusion mixing chambers. The multiple flow channels are distributed in a ring, and the two ends are respectively connected to the primary diffusion mixing chamber and the secondary collision mixing chamber. One end of the intermediate drainage channel is connected to the secondary collision mixing chamber, and the other end is connected to the secondary diffusion mixing chamber. The outflow mixing chamber is provided with a rectifying chamber and an outlet. The rectifying chamber is connected to the secondary diffusion mixing chamber and the outlet, and the outlet is connected to the reactor. The alkali liquid tank, multiple salt liquid tanks and the reactor are connected to the multiple inlets.

2. A precursor system for a multi-liquid phase mixing process according to claim 1, characterized in that: In step S2, the flow ratio of nickel sulfate, cobalt sulfate, manganese sulfate solution, sodium hydroxide solution and reactor bottom liquid fed into the multi-effect mixer is 5:2:3:10:10, the speed range of the feed into the multi-effect mixer is controlled between 0.6-4m / s, and the working pressure is controlled to be 0.1-0.3Mpa.

3. The multi-liquid phase mixing process for precursor preparation according to claim 1, characterized in that: The temperature of the reactor in step S3 is controlled at 50° C., and the pH value is controlled according to the concentration of ammonia water in the reactor.

4. A precursor system standby multi-liquid phase mixing device, characterized in that: The precursor system backup multi-liquid phase mixing process applied to any one of claims 1 to 3 comprises an alkali liquid tank, multiple salt liquid tanks, a multi-effect mixer and a reactor, wherein the multi-effect mixer comprises a primary mixing chamber, an intermediate mixing chamber and an outflow mixing chamber connected in sequence, the primary mixing chamber is provided with multiple inlets, and a primary collision mixing chamber, a primary drainage channel and a primary diffusion mixing chamber are provided inside, the multiple inlets are connected to the primary collision mixing chamber, one end of the primary drainage channel is connected to the primary collision mixing chamber, and the other end is connected to the primary diffusion mixing chamber, the intermediate mixing chamber is provided with a primary collision mixing chamber, and the primary drainage channel is provided with a primary diffusion mixing chamber. The intermediate mixing chamber is provided with multiple flow channels, secondary collision mixing chambers, intermediate drainage channels and secondary diffusion mixing chambers. The multiple flow channels are distributed in a ring, and the two ends are respectively connected to the primary diffusion mixing chamber and the secondary collision mixing chamber. One end of the intermediate drainage channel is connected to the secondary collision mixing chamber, and the other end is connected to the secondary diffusion mixing chamber. The outflow mixing chamber is provided with a rectifying chamber and an outlet. The rectifying chamber is connected to the secondary diffusion mixing chamber and the outlet, and the outlet is connected to the reactor. The alkali liquid tank, multiple salt liquid tanks and the reactor are connected to the multiple inlets.

5. The precursor system multi-liquid phase mixing device according to claim 4, characterized in that: An arc-shaped recess is formed in the region between the plurality of flow channel inlets.

6. The precursor system multi-liquid phase mixing device according to claim 4, characterized in that: The primary mixing chamber, the intermediate mixing chamber and the outflow mixing chamber are connected by bolts.

7. The precursor system multi-liquid phase mixing device according to claim 4, characterized in that: An opening is provided on the side wall of the intermediate mixing chamber, and a plug is provided in the opening.

8. The precursor system multi-liquid phase mixing device according to claim 4, characterized in that: An electric ball valve, a mass flow meter and an electromagnetic proportional valve are provided between the alkali liquid tank, the multiple salt liquid tanks and the flow inlet.

9. The precursor system multi-liquid phase mixing device according to claim 4, characterized in that: A reflux supply system is provided between the reaction kettle and the outlet, and a magnetic pump is provided in the reflux supply system.

10. A precursor system multi-liquid phase mixing device according to any one of claims 4 to 9, characterized in that: A spoiler is provided in the primary drainage channel and the intermediate drainage channel. The spoiler is made of non-metallic material. The spoiler includes an elastic bracket and a flow wrapping wire. The flow wrapping wire is wound around the elastic bracket, and the elastic bracket is supported in the primary drainage channel and the intermediate drainage channel.

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