CN218795920U - Ternary precursor preparation reaction kettle - Google Patents

Abstract

The utility model discloses a ternary precursor preparation reation kettle, it includes the reation kettle body, stirs subassembly, a plurality of inlet pipes, first ultrasonic device and a plurality of second ultrasonic device, and wherein the stirring end of stirring subassembly, the at least part of a plurality of inlet pipes and the transmitting terminal of first ultrasonic device all are located the reation kettle internally, and the transmitting terminal and the inlet pipe bottom parallel and level of first ultrasonic device, a plurality of second ultrasonic device circumference equipartitions set up the lateral wall at the reation kettle body. Through setting up a plurality of second ultrasonic device at the lateral wall of the reation kettle body, when reaction material kept away from the stirring end of stirring subassembly and was close to in the lateral wall of the reation kettle body, second ultrasonic device can launch the ultrasonic wave to this reaction material to with its broken dispersion, make reaction material's reaction more abundant, solved reaction material and taken place the problem of adhesion reunion at the stirring dead angle department of stirring subassembly, effectively improved the yield of preparation gained ternary precursor product.

Description

Ternary precursor preparation reaction kettle

Technical Field

The utility model belongs to the technical field of chemical reaction equipment, concretely relates to ternary precursor preparation reation kettle.

Background

A ternary precursor in the positive electrode of the lithium ion battery is a key material influencing the positive performance of the lithium ion battery, and the traditional method for preparing the precursor is to realize the preparation of the precursor by detecting the pH value and the temperature of a reaction kettle and utilizing a pure mechanical stirring mode. But because the surface activity of the product particles at the initial stage of the reaction is higher, the product particles are easy to agglomerate, thereby influencing the particle consistency of the final product and reducing the product performance.

Chinese utility model patent with application number CN201811181164.3 discloses an ultrasonic oscillation reactor for preparing lithium ion battery cathode material precursor, this reactor includes agitating unit and ultrasonic oscillation generator, ultrasonic oscillation generator is close to in the inlet pipe setting and its lower extreme and inlet pipe lower extreme parallel and level for the raw materials just obtains effective dispersion under ultrasonic's effect when getting into the reactor, avoid the adhesion of reaction product to reunite, make the product closely knit nature strong, the performance improves. However, when the reaction process is performed in the reactor, the products obtained by the reaction tend to move on the side wall of the reactor, and the ultrasonic oscillation generator cannot break up and separate the reactants on the side wall of the reactor, so that the reaction products are adhered and agglomerated on the side wall of the reactor, and the finished product rate and the performance of the final product are affected.

Based on the above, there is a need for a ternary precursor preparation reaction kettle to solve the problems in the prior art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a ternary precursor preparation reation kettle can further solve the reaction product and appear the problem that the adhesion is reunited to improve product yield.

In order to realize the purpose, the utility model adopts the following technical scheme:

ternary precursor preparation reation kettle includes:

the reaction kettle body is used for receiving a reaction solution required for preparing the ternary precursor;

a plurality of feed pipes, the plurality of feed pipes being at least partially located within the reaction vessel body;

the stirring component is provided with a stirring end, and the stirring end is positioned in the reaction kettle body;

the first ultrasonic device is provided with a transmitting end, the transmitting end is positioned in the reaction kettle body and is close to the feeding pipe, and the bottom end of the feeding pipe is flush with the transmitting end;

and the plurality of second ultrasonic devices are circumferentially and uniformly distributed on the side wall of the reaction kettle body.

Optionally, the device for preparing a precursor of a positive electrode material further comprises a plurality of baffles, and the plurality of baffles are vertically arranged on the inner wall of the reaction kettle body at intervals in the circumferential direction.

Optionally, the baffle is arranged at an interval with the inner wall of the reaction kettle body.

Optionally, the stirring subassembly includes driving motor, speed reducer, (mixing) shaft and stirring rake, the one end fixed connection of (mixing) shaft in the stirring rake, the (mixing) shaft with the stirring rake combination forms the stirring end, the other end of (mixing) shaft passes through the speed reducer with driving motor connects.

Optionally, the stirring rake includes first blade group, second blade group and third blade group, first blade group, second blade group with the third blade group is in top-down interval sets up on the (mixing) shaft, the height of inlet pipe bottom end on vertical direction is less than the second blade group.

Optionally, the first blade group, the second blade group and the third blade group each include at least two blades circumferentially arranged along the stirring shaft axis, and the blades are arranged obliquely with respect to a horizontal plane.

Optionally, the feeding pipe comprises a metal mixed liquid feeding pipe and an alkali liquid feeding pipe, and the alkali liquid feeding pipe and the metal mixed liquid feeding pipe are located on two sides of the stirring shaft;

and a complexing agent feed inlet is also formed in the reaction kettle body, and the complexing agent feed inlet and the metal mixed liquid feed pipe are positioned on the same side of the stirring shaft.

Optionally, a material outlet is formed in the bottom of the reaction kettle, and a circulating pump is connected between the material outlet and the feeding pipe.

Optionally, the device for preparing a precursor of a positive electrode material further comprises a jacket fixedly sleeved on the outer wall of the reaction kettle body, and a heat exchange medium is filled between the jacket and the outer wall of the reaction kettle body.

Optionally, still be provided with level gauge, PH detector and temperature detector on the reation kettle body, positive pole material precursor preparation facilities still includes the controller, the level gauge the PH detector with temperature detector all through the signal line with the controller is connected.

Has the advantages that: the utility model provides a ternary precursor preparation reation kettle includes a plurality of second ultrasonic device, a plurality of second ultrasonic device circumference equipartitions set up in the lateral wall of the reation kettle body, through setting up a plurality of second ultrasonic device, can hold and be close to the reaction mass transmission ultrasonic wave of reation kettle body lateral wall to the stirring of keeping away from the stirring subassembly, the ultrasonic wave is with the broken dispersion of reaction mass, thereby make reaction mass's reaction more abundant, the problem of reaction mass adhesion reunion takes place in the stirring dead angle department of stirring subassembly has been solved, the yield of final product has effectively been improved.

Drawings

FIG. 1 is a schematic diagram of the internal structure of a ternary precursor preparation reaction kettle provided by the present invention;

fig. 2 is a schematic structural diagram of the stirring assembly provided by the present invention;

FIG. 3 is a schematic structural view of the reaction vessel provided by the present invention;

FIG. 4 is an enlarged view of a portion of FIG. 3 at A;

fig. 5 is a schematic structural view of a jacket according to the present invention.

In the figure:

1. a reaction kettle body; 11. a complexing agent feeding port; 12. a nitrogen inlet; 13. an additive feed port; 14. a liquid level meter insertion opening; 15. a temperature detector insertion port; 16. inserting a PH detector into the port; 17. a material outlet; 18. an observation port;

2. a feeding pipe; 21. a metal mixed liquid feeding pipe; 22. an alkali liquor feeding pipe;

3. a stirring assembly; 31. a drive motor; 32. a speed reducer; 33. a stirring shaft; 34. a stirring paddle; 341. a first blade group; 342. a second blade group; 343. a third blade group; 35. a shaft sleeve;

4. a first ultrasonic device; 5. a second ultrasonic device; 6. a circulation pump; 7. a baffle plate;

8. a jacket; 81. an upper opening; 82. accommodating grooves; 821. a liquid inlet; 822. and a liquid outlet.

Detailed Description

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but 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 thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may include, for example, a fixed connection or a detachable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The technical solutions of the present invention will be described more clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The ternary precursor preparation reaction kettle provided by the invention will be specifically described with reference to the accompanying drawings 1 to 5 and specific examples.

Referring to fig. 1, the ternary precursor preparation reaction kettle provided in this embodiment includes a reaction kettle body 1, a plurality of feeding pipes 2, a stirring assembly 3, a first ultrasonic device 4, and a plurality of second ultrasonic devices 5. The reaction kettle body 1 is used for receiving reaction solution required for preparing the ternary precursor, and the reaction kettle body 1 can be made of stainless steel materials so as to improve corrosion resistance; at least part of the plurality of feeding pipes 2 is positioned in the reaction kettle body 1; the stirring component 3 is provided with a stirring end which is positioned in the reaction kettle body and can stir the reaction materials conveyed into the reaction kettle body 1 from the feeding pipe 2; the first ultrasonic device 4 is provided with an emitting end which is positioned in the reaction kettle body 1 and is close to the feeding pipe 2, and the bottom of the feeding pipe 2 is flush with the emitting end; a plurality of second ultrasonic devices 5 are circumferentially and uniformly distributed on the side wall of the reaction kettle body 1.

In the production of the ternary precursor, for example, a reaction material is added into the reaction kettle body 1 through the feeding pipe 2, and the stirring assembly 3 and the first ultrasonic device 4 are simultaneously started, and another reaction material, a complexing agent, nitrogen and an additive are respectively added into the reaction kettle body 1 through the feeding pipe 2, the complexing agent feeding port 11, the nitrogen gas inlet 12 and the additive feeding port 13 under the conditions of the set temperature, the set PH value, the set reaction material liquid level and the like, so as to prepare the ternary precursor under the protection of nitrogen, and at this time, the second ultrasonic device 5 is started and kept emitting ultrasonic waves into the reaction kettle body 1. The transmitting end of the first ultrasonic device 4 is flush with the bottom end of the feeding pipe 2, so that the reaction materials can be effectively dispersed before entering the reaction kettle body 1, and the adhesion and agglomeration of reaction products are avoided; because the rabbling mechanism among the prior art has the stirring dead angle at reaction unit's lateral wall for reaction product easily agglomerates at reaction unit's lateral wall adhesion, consequently set up a plurality of second ultrasonic device 5 through the lateral wall at the reation kettle body 1 in this embodiment, can carry out the broken dispersion once more with the reaction product that keeps away from the stirring end of stirring subassembly 3 and is close to reation kettle body 1 lateral wall, thereby further avoided reaction material to appear adhesion, the problem of agglomeration in reaction process, the closely knit degree and the final yield of reaction product have been improved.

It should be noted in advance that, the additive in this embodiment may be one or two mixtures of sodium hydroxide, sodium carbonate, ammonium carbonate and ammonium bicarbonate, and the specific components of the additive are not specifically limited in this regard, and those skilled in the art may correspondingly select the components of the reaction material in the ternary precursor prepared in practice, so as to continuously supplement the material components required for preparing the ternary precursor into the reaction kettle.

Specifically, level gauge inserted hole 14 has still been seted up at the top of the reation kettle body 1, temperature detection meter inserted hole 15 and PH detection meter inserted hole 16 have been seted up to the bottom of the reation kettle body 1 lateral wall, make the level gauge, temperature detection meter and PH detection meter can insert in the reation kettle body 1, be used for detecting each item parameter value in the reation kettle body 1, and this positive pole material precursor preparation facilities still includes controller (not shown in the figure), the level gauge, PH detection meter and temperature detection meter all are connected with the controller through the signal line, make the staff can real-time supervision reation kettle body 1 in the material liquid level, each item parameter such as temperature value and PH value, for the granule growth of preparation ternary precursor provides suitable condition.

More specifically, the bottom of the reaction kettle body 1 is also provided with a material outlet 17, a circulating pump 6 is connected between the material outlet 17 and the feeding pipe 2, and after the circulating pump 6 is started, the reaction material can be pumped out from the material outlet 17 and then conveyed to the feeding pipe 2 through the circulating pump 6, so that the reaction material is subjected to external circulation, and the effect of mixing the reaction material in the reaction kettle body 1 can be enhanced; in addition, in this embodiment, a discharging control valve (not shown in the figure) is further connected to the circulating pump 6, the discharging control valve is also connected to the controller through a signal, and when it is detected that the concentration of the solid precipitate of the ternary precursor reaction product in the reaction kettle 1 reaches a set value, the controller opens the discharging control valve, so as to discharge the qualified ternary precursor reaction product.

Optionally, the top of the reaction kettle body 1 in this embodiment is further provided with an observation port 18, and a worker can observe the reaction condition of the reaction materials in the reaction kettle body through the observation port 18 at any time.

Referring to fig. 2, in this embodiment, the stirring assembly 3 includes a driving motor 31, a speed reducer 32, a stirring shaft 33 and a stirring paddle 34, the stirring shaft and the stirring paddle are combined to form the stirring end, wherein the driving motor 31 is a motor of 5IK120RGN-CF, one end of the stirring shaft 33 passes through the reaction kettle body 1 and is then fixedly connected to the stirring paddle 34, the other end of the stirring shaft 33 is connected to the driving motor 31 through the speed reducer 32, and the stirring paddle 34 is located inside the reaction kettle body 1, so that the driving motor 31 can drive the stirring paddle 34 to rotate through the speed reducer 32 and the stirring shaft 33, and the stirring effect can be improved. The stirring assembly 3 is simple in structure and low in assembly difficulty, and can meet the preparation requirement of the ternary precursor in the embodiment.

Further, the stirring paddle 34 comprises a first paddle group 341, a second paddle group 342 and a third paddle group 343 which are arranged on the stirring shaft 33 at intervals from top to bottom, and the height of the bottom end of the feeding pipe 2 in the vertical direction is lower than that of the second paddle group 342, so that the stirring effect of the stirring paddle 34 can be further improved, and the dispersion of reaction materials is accelerated.

Still further, each blade group comprises at least two blades (not shown in the figure) distributed along the circumferential direction of the axis of the stirring shaft 33, and each blade is arranged obliquely relative to the horizontal plane. Preferably, each blade group in the embodiment includes four blades, and an angle between a lower surface of each blade and a horizontal plane is 30-75 ° so as to obtain a better stirring effect.

It can be understood that the inclination and the quantity of the interval and the paddle that set up between the suitable driving motor 31 model, paddle group number, every group paddle group of the required stirring intensity of material and product kind, stirring power etc. in the reaction that technical staff in the field can be based on the reaction to satisfy different demands to the finished product effect of ternary precursor under the different operating condition, the utility model discloses do not prescribe a limit to this.

Further, in this embodiment, the outer surface of the stirring shaft 33, the outer surface of the blade, and the inner surface of the reaction vessel body 1 are respectively coated with a non-metal coating, which may be a teflon coating, a ceramic coating, or the like, to prevent the reaction materials from adhering to the blade, the stirring shaft 33, or the inner wall of the reaction vessel body 1.

In order to improve the connection reliability between the stirring paddles 34 and the stirring shaft 33, in this embodiment, each group of paddle sets is fixedly connected with the stirring shaft 33 through a shaft sleeve 35, so that the connection between the stirring paddles 34 and the stirring shaft 33 is stable; moreover, the paddle can be detached from the shaft sleeve 35, so that the structure of the paddle, the stirring shaft 33 and the like can be replaced and cleaned by workers.

Optionally, refer to as shown in fig. 3, in this embodiment, inlet pipe 2 includes mixed liquid metal inlet pipe 21 and alkali lye inlet pipe 22, and alkali lye inlet pipe 22 and mixed liquid metal inlet pipe 21 are located the both sides of (mixing) shaft 33, and complexing agent feed inlet 11 and mixed liquid metal inlet pipe 21 are located the homonymy of (mixing) shaft 33, and wherein the complexing agent can choose for use in aqueous ammonia, urea, the sodium citrate one or more, and the specific condition of selecting for use then decides according to the operating condition demand, the utility model discloses do not limit this. The aim at that sets up like this, in the moment of metal mixed liquid is carried to the reation kettle body 1 from metal mixed liquid inlet pipe 21, metal ion in the metal mixed liquid can carry out the complexation with the complexing agent to slow down the speed that metal ion deposits, improve reaction process's stability.

Correspondingly, as shown in fig. 1, in this embodiment, one first ultrasonic device 4 is disposed on each of the side close to the metal mixed liquid feeding pipe 21 and the side close to the alkali liquid feeding pipe 22, and the emitting ends of the two first ultrasonic devices 4 are flush with the bottom end of the corresponding metal mixed liquid feeding pipe 21 and the bottom end of the alkali liquid feeding pipe 22, respectively, so as to ensure that the alkali liquid and the metal mixed liquid are already in a state of being broken up by ultrasonic waves before entering the reaction kettle body 1, thereby avoiding the occurrence of the condition of inconsistent sizes of reaction product particles, and improving the yield of the reaction product.

Of course, in some parallel embodiments, the number of the feeding pipes 2 and the first ultrasonic devices 4 may be one or more than two, for example, if there are only two reaction materials, one reaction material may be fed into the reaction vessel body 1 in advance, and only one feeding pipe 2 and one first ultrasonic device 4 may be provided for feeding and dispersing the other reaction material; if a plurality of reaction materials react, the reaction materials which do not react with each other can be added into the reaction kettle body 1 in advance, then the reaction materials which react with the reaction materials in the reaction kettle body 1 are added into the reaction kettle body 1 through different feeding pipes 2, and simultaneously, the reaction materials are dispersed through a first ultrasonic device 4 which is arranged close to each feeding pipe 2. Therefore, the skilled person can determine the number of the feeding pipes 2 and the first ultrasonic devices 4 according to the different types of the reaction materials in different working conditions.

Optionally, in the present embodiment, the first ultrasonic device 4 and the second ultrasonic device 5 each include an ultrasonic generator, an ultrasonic transducer, and an amplitude transformer. Taking the first ultrasonic device 4 as an example, the ultrasonic generator is positioned above the reaction kettle body 1 and is used for providing a high-frequency electric signal; the ultrasonic transducer is the transmitting end and is positioned in the reaction kettle body 1, one end of the ultrasonic transducer is connected to the ultrasonic generator through a signal cable, a high-frequency electric signal is sent into the ultrasonic transducer through the signal cable, and the ultrasonic transducer converts the high-frequency electric signal into high-frequency vibration; the amplitude transformer is positioned in the reaction kettle body 1, and can transmit the vibration after the vibration is processed into the ternary precursor reaction mixed liquid, so that the reaction products can be crushed and dispersed, and the agglomeration among the reaction product particles is hindered.

Preferably, for the supersound improves dispersion effect, the change width of cloth pole chooses dumbbell shape change width of cloth pole for use, can provide the impact force stronger, the bigger ultrasonic wave of cavitation effect microjet.

It is understood that the ultrasonic generator, the ultrasonic transducer and the horn are not shown here for the sake of clarity of the drawings, but those skilled in the art can easily realize the ultrasonic generator, the ultrasonic transducer and the horn by using the prior art according to the contents described in the present embodiment, and detailed description thereof is omitted here.

Preferably, the number of the second ultrasonic devices 5 is four, so that the effect of crushing and dispersing the reaction materials at the side wall of the reaction kettle body 1 can be further improved, and the phenomenon of adhesion and agglomeration of the reaction materials in the reaction kettle body 1 is thoroughly solved. Of course, in some other embodiments, the number of the second ultrasonic devices 5 may be three, five or more, and it is within the scope of the present invention as long as the reaction materials can be completely crushed and dispersed on the sidewall of the reaction kettle body 1.

In order to improve the uniformity and the dispersibility of reaction materials and prevent reaction products from being retained in a dead angle region of the reaction kettle body 1, as shown in fig. 1 and 3, the ternary precursor preparation reaction kettle further comprises a plurality of baffles 7, the number of the baffles 7 in the embodiment is preferably four, the cross section of each baffle 7 is rectangular, and the baffles 7 are vertically arranged on the inner wall of the reaction kettle body 1 at intervals in the circumferential direction. When the solution containing the reaction materials rotates, the plurality of baffles 7 can disturb the rotation of the solution again, so that the stirring and mixing effects of the reaction materials are improved, and the uniformity and the dispersibility of the reaction materials are improved.

Further, as shown in fig. 3 and 4, the baffle 7 is spaced from the inner wall of the reaction kettle body 1 to reduce the dead angle of the baffle 7, so as to further improve the stirring effect of the reaction materials and avoid the reaction materials from being retained at the included angle between the baffle 7 and the inner wall of the reaction kettle body 1. Preferably, the distance b between the baffle 7 and the inner wall of the reaction kettle body 1 in the embodiment is 0.5-1cm. More preferably, the distance h between the baffle 7 and the inner wall of the reaction vessel body 1 is 0.8cm.

Optionally, the outer wall of the reaction kettle body 1 is further fixedly sleeved with a jacket 8, a heat exchange medium is filled between the jacket 8 and the outer wall of the reaction kettle body 1, and heat exchange is performed between the heat exchange medium and the reaction kettle body 1, so that an appropriate reaction temperature in the reaction kettle body 1 is maintained, and normal reaction is ensured.

Specifically, referring to fig. 5, the jacket 8 has an upper opening 81 and an accommodating groove 82, the reaction kettle body 1 is placed in the accommodating groove 82 through the upper opening 81, an opening portion of the accommodating groove 82 is welded to the reaction kettle body 1, a liquid inlet 821 is formed in a bottom wall of the accommodating groove 82, a liquid outlet 822 is formed in a side wall of the accommodating groove 82, a heat exchange medium is ensured to fill the space between the jacket 8 and the reaction kettle body 1 in a downward-in and upward-out manner, in this embodiment, water is selected as the heat exchange medium, in an implementation process, if the temperature in the reaction kettle body 1 is too high, the liquid inlet 821 and the liquid outlet 822 are opened, the heat exchange medium is cooled through a cooling device, and the cooled heat exchange medium is conveyed to the space between the jacket 8 and the reaction kettle body 1 through the liquid inlet 821, so as to reduce the temperature in the reaction kettle body 1; if the temperature in the reaction kettle body 1 is too high, the heat exchange medium is heated by the heating device, and the heated heat exchange medium is conveyed between the jacket 8 and the reaction kettle body 1 through the liquid inlet 821, so that the temperature in the reaction kettle body 1 is increased.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. Ternary precursor preparation reation kettle, its characterized in that includes:

the reaction kettle body (1) is used for receiving reaction solution required by preparing a ternary precursor;

a plurality of feeding pipes (2), wherein the plurality of feeding pipes (2) are at least partially positioned in the reaction kettle body;

the stirring component (3) is provided with a stirring end, and the stirring end is positioned in the reaction kettle body (1);

the first ultrasonic device (4) is provided with an emitting end, the emitting end is positioned in the reaction kettle body (1) and is close to the feeding pipe (2), and the bottom end of the feeding pipe (2) is flush with the emitting end;

a plurality of second ultrasonic device (5), it is a plurality of second ultrasonic device (5) circumference equipartition set up in reation kettle body (1) lateral wall.

2. The ternary precursor preparation reaction kettle according to claim 1, further comprising a plurality of baffles (7), wherein the baffles (7) are vertically and circumferentially arranged on the inner wall of the reaction kettle body (1) at intervals.

3. The ternary precursor preparation reactor according to claim 2, wherein the baffle (7) is spaced from the inner wall of the reactor body (1).

4. The ternary precursor preparation reaction kettle according to claim 1, wherein the stirring assembly (3) comprises a driving motor (31), a speed reducer (32), a stirring shaft (33) and a stirring paddle (34), the stirring shaft (33) and the stirring paddle (34) are combined to form the stirring end, one end of the stirring shaft (33) is fixedly connected to the stirring paddle (34), and the other end of the stirring shaft (33) is connected with the driving motor (31) through the speed reducer (32).

5. The ternary precursor preparation reactor according to claim 4, wherein said stirring paddle (34) comprises a first paddle group (341), a second paddle group (342) and a third paddle group (343), said first paddle group (341), said second paddle group (342) and said third paddle group (343) being arranged at intervals from top to bottom on said stirring shaft (33), said bottom end of said feeding pipe (2) having a lower height in the vertical direction than said second paddle group (342).

6. The ternary precursor preparation reactor according to claim 5, wherein said first paddle set (341), said second paddle set (342), and said third paddle set (343) each comprise at least two paddles circumferentially arranged along the axis of said stirring shaft (33), and said paddles are arranged obliquely with respect to a horizontal plane.

7. The ternary precursor preparation reaction kettle according to claim 4, wherein the feeding pipe (2) comprises a metal mixed liquid feeding pipe (21) and an alkali liquid feeding pipe (22), and the alkali liquid feeding pipe (22) and the metal mixed liquid feeding pipe (21) are positioned on two sides of the stirring shaft (33);

and a complexing agent feeding hole (11) is further formed in the reaction kettle body, and the complexing agent feeding hole (11) and the metal mixed liquid feeding pipe (21) are located on the same side of the stirring shaft (33).

8. The ternary precursor preparation reaction kettle according to claim 1, wherein a material outlet (16) is formed at the bottom of the reaction kettle, and a circulating pump (6) is connected between the material outlet (16) and the feeding pipe (2).

9. The ternary precursor preparation reaction kettle according to claim 1, further comprising a jacket (8) fixedly sleeved on the outer wall of the reaction kettle body (1), wherein a heat exchange medium is filled between the jacket (8) and the outer wall of the reaction kettle body (1).

10. The ternary precursor preparation reaction kettle according to any one of claims 1 to 9, further comprising a liquid level meter, a pH detector and a temperature detector arranged on the reaction kettle body (1), and a controller connected to the liquid level meter, the pH detector and the temperature detector through signal lines.

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