Reaction kettle

Abstract

The utility model provides a reaction kettle. The reaction kettle comprises a kettle body which comprises a main body and a cover body covering the main body; the salt solution feeding pipe is arranged on the cover body and extends into the body; the ammonia water feeding pipe is arranged on the cover body and comprises a first main pipeline and at least two first branch pipelines which are communicated in sequence, each first branch pipeline comprises a first pipe section and a second pipe section which are communicated in sequence and are arranged at a first included angle, and the second pipe section is provided with a plurality of first liquid outlets which are formed in the height direction and / or the circumferential direction of the body at intervals; the alkaline solution feeding pipe is arranged on the cover body and comprises a second main pipeline and at least two second branch pipelines which are sequentially communicated, each second branch pipeline comprises a third pipe section and a fourth pipe section which are sequentially communicated and are arranged at a second included angle, and the fourth pipe section is provided with a plurality of second liquid outlets which are arranged at intervals in the height direction and / or the circumferential direction of the body. The reaction kettle disclosed by the utility model solves the problem that the particle size distribution of a precursor is relatively wide as the feeding site of the reaction kettle in the prior art is too single.

Description

Technical Field

[0001] The utility model relates to the technical field of reactors, and more particularly, to a reactor. Background Art

[0002] Currently, ternary materials are mainly prepared by high-temperature sintering after mixing ternary precursors with a lithium source. Nickel-cobalt-manganese hydroxide is a widely used ternary precursor material with a chemical general formula of Ni x Co y Mn z (OH)2, and is usually prepared by a co-precipitation method. The specific process is as follows: Nickel, cobalt, and manganese salt solutions, an alkali solution, and ammonia water are added to a reactor and filled with a protective gas. In a reactor with a stirring and temperature control jacket, by controlling the reaction conditions, precipitate particles of a precursor with a certain particle size and particle size distribution are generated.

[0003] In the prior art, the salt solution, the alkali solution, and the ammonia water flow into the reactor through pipelines respectively for reaction. The salt ions in the solution first complex with the ammonia water and then undergo a precipitation reaction. However, due to the overly single feeding site described above, the local solution concentration is too high, the reaction proceeds too fast, and the generated precursor has a wide particle size distribution and uneven particle size distribution. Summary of the Utility Model

[0004] The main object of the present utility model is to provide a reactor to solve the problem of the overly wide particle size distribution of the precursor caused by the overly single feeding site of the reactor in the prior art.

[0005] To achieve the above object, the present utility model provides a reactor, including: a kettle body, including a main body and a cover body covering the main body; a salt solution feeding pipe, arranged on the cover body and extending into the main body; an ammonia water feeding pipe, arranged on the cover body and including a first main pipeline and at least two first branch pipelines connected in sequence. Each first branch pipeline includes a first pipe section and a second pipe section connected in sequence and arranged at a first included angle. The second pipe section has a plurality of first liquid outlets arranged at intervals along the height direction and / or the circumferential direction of the main body; an alkali solution feeding pipe, arranged on the cover body and including a second main pipeline and at least two second branch pipelines connected in sequence. Each second branch pipeline includes a third pipe section and a fourth pipe section connected in sequence and arranged at a second included angle. The fourth pipe section has a plurality of second liquid outlets arranged at intervals along the height direction and / or the circumferential direction of the main body.

[0006] Further, the reactor further includes: an air inlet pipe, communicated with the salt solution feeding pipe, and the communication position of the air inlet pipe and the salt solution feeding pipe is higher than the outlet of the salt solution feeding pipe.

[0007] Further, the height of the outlet is higher than the height of the first liquid outlet; and / or, the height of the outlet is higher than the height of the second liquid outlet.

[0008] Further, the reaction kettle further includes: a stirring device, including a driving device, a stirring rod, and a stirring structure. The stirring structure is arranged on the stirring rod, and the driving device is drivingly connected to the stirring rod to drive the stirring rod to drive the stirring structure to rotate; wherein, there are multiple stirring structures, and the multiple stirring structures are arranged at intervals along the length direction and / or the circumferential direction of the stirring rod.

[0009] Further, the reaction kettle further includes: a first spraying device, arranged at the liquid inlet of the first main pipeline. The first spraying device has at least two first spraying parts, and the at least two first spraying parts are arranged in one-to-one correspondence with at least two first branch pipelines.

[0010] Further, the reaction kettle further includes: at least two first baffles, which are arranged in one-to-one correspondence with the at least two first spraying parts. Each first baffle is movably arranged at the corresponding first spraying part to block or avoid the first spraying part.

[0011] Further, the reaction kettle further includes: a second spraying device, arranged at the liquid inlet of the second main pipeline. The second spraying device has at least two second spraying parts, and the at least two second spraying parts are arranged in one-to-one correspondence with at least two second branch pipelines.

[0012] Further, the reaction kettle further includes: at least two second baffles, which are arranged in one-to-one correspondence with the at least two second spraying parts. Each second baffle is movably arranged at the corresponding second spraying part to block or avoid the second spraying part.

[0013] Further, along the height direction of the reaction kettle, multiple first liquid outlets are arranged in one-to-one correspondence with the multiple stirring structures; the liquid passing area of the upper first liquid outlet among two adjacent first liquid outlets is smaller than that of the lower first liquid outlet.

[0014] Further, along the height direction of the reaction kettle, multiple second liquid outlets are arranged in one-to-one correspondence with the multiple stirring structures; the liquid passing area of the upper second liquid outlet among two adjacent second liquid outlets is smaller than that of the lower second liquid outlet.

[0015] Further, an atomizing nozzle is arranged at the liquid outlet of the salt solution feed pipe.

[0016] Applying the technical solution of the present utility model, the reaction kettle includes a kettle body, a salt solution feed pipe, an ammonia water feed pipe, and an alkali solution feed pipe. The kettle body includes a main body and a cover body covering the main body, and the salt solution feed pipe is arranged on the cover body and extends into the main body. In this way, since each first branch pipe of the ammonia water feed pipe includes a first pipe section and a second pipe section that are sequentially connected and arranged at a first included angle, and the second pipe section has a plurality of first liquid outlets arranged at intervals along the height direction and / or the circumferential direction of the main body. Each second branch pipe of the alkali solution feed pipe includes a third pipe section and a fourth pipe section that are sequentially connected and arranged at a second included angle, and the fourth pipe section has a plurality of second liquid outlets arranged at intervals along the height direction and / or the circumferential direction of the main body. Furthermore, the ammonia water feed sites and the alkali solution feed sites are made more diverse, avoiding excessive local concentration and affecting the dispersion effect of the precursor particle size. Furthermore, the problem that the feed sites of the reaction kettle in the prior art are too single, resulting in a relatively wide distribution of the precursor particle size, is solved, and the mixing effect is enhanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings forming a part of this application are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0018] Figure 1 The structural schematic diagram of an embodiment of the reaction kettle according to the present utility model is shown;

[0019] Figure 2 Shows Figure 1 The structural schematic diagram of the first spraying device of the reaction kettle in

[0020] Among them, the above-mentioned accompanying drawings include the following reference numerals:

[0021] 10. Kettle body;

[0022] 20. Salt solution feed pipe;

[0023] 30. Ammonia water feed pipe; 31. First main pipe; 32. First branch pipe; 321. First pipe section; 322. Second pipe section; 323. First liquid outlet;

[0024] 40. Alkali solution feed pipe; 41. Second main pipe; 42. Second branch pipe; 421. Third pipe section; 422. Fourth pipe section; 423. Second liquid outlet;

[0025] 50. Air inlet pipe;

[0026] 60. Driving device;

[0027] 70. Stirring rod;

[0028] 80. Stirring structure;

[0029] 90. First injection device; 91. First injection part. Detailed implementation mode

[0030] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The following will refer to the drawings and combine with the embodiments to elaborate on the present utility model in detail.

[0031] It should be pointed out that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs.

[0032] In the present utility model, unless otherwise stated, the orientation words such as "upper, lower" are usually in the direction shown in the drawings, or in the vertical, perpendicular or gravitational direction; similarly, for the convenience of understanding and description, "left, right" are usually left and right as shown in the drawings; "inner, outer" refer to the inner and outer of the contour of each component itself, but the above orientation words do not limit the present utility model.

[0033] In order to solve the problem that the feed sites of the reaction kettle in the prior art are too single, resulting in a relatively wide particle size distribution of the precursor, this application provides a reaction kettle.

[0034] As Figure 1 and Figure 2 shown, the reaction kettle includes a kettle body 10, a salt solution feed pipe 20, an ammonia water feed pipe 30, and an alkali solution feed pipe 40. Among them, the kettle body 10 includes a main body and a cover body covering the main body. The salt solution feed pipe 20 is arranged on the cover body and extends into the main body. The ammonia water feed pipe 30 is arranged on the cover body and includes a first main pipe 31 and at least two first branch pipes 32 connected in sequence. Each first branch pipe 32 includes a first pipe section 321 and a second pipe section 322 connected in sequence and arranged at a first angle. The second pipe section 322 has a plurality of first liquid outlets 323 arranged at intervals in the height direction and / or circumferential direction of the main body. The alkali solution feed pipe 40 is arranged on the cover body and includes a second main pipe 41 and at least two second branch pipes 42 connected in sequence. Each second branch pipe 42 includes a third pipe section 421 and a fourth pipe section 422 connected in sequence and arranged at a second angle. The fourth pipe section 422 has a plurality of second liquid outlets 423 arranged at intervals in the height direction and / or circumferential direction of the main body.

[0035] Applying the technical solution of this embodiment, since each first branch pipe 32 of the ammonia water feed pipe 30 includes a first pipe section 321 and a second pipe section 322 that are sequentially connected and arranged at a first included angle, and the second pipe section 322 has a plurality of first liquid outlets 323 that are spaced along the height direction and / or the circumferential direction of the body. Each second branch pipe 42 of the alkali solution feed pipe 40 includes a third pipe section 421 and a fourth pipe section 422 that are sequentially connected and arranged at a second included angle, and the fourth pipe section 422 has a plurality of second liquid outlets 423 that are spaced along the height direction and / or the circumferential direction of the body. As a result, the ammonia water feed sites and the alkali solution feed sites are more diversified, avoiding excessive local concentration and affecting the dispersion effect of the precursor particle size. Furthermore, the problem that the feed sites of the reaction kettle in the prior art are too single, resulting in a relatively wide distribution of the precursor particle size, is solved, and the mixing effect is enhanced.

[0036] In this embodiment, there are two first branch pipes 32, the first included angle is an obtuse angle, and the second pipe section 322 has two first liquid outlets 323 that are spaced along the height direction of the body. The two first liquid outlets 323 can achieve ammonia water liquid outlet at different heights. There are two second branch pipes 42, the second included angle is an obtuse angle, and the fourth pipe section 422 has two second liquid outlets 423 that are spaced along the height direction of the body. The two second liquid outlets 423 can achieve alkali solution liquid outlet at different heights. In this way, the above settings increase the feed sites of the ammonia water and the alkali solution, thereby enhancing the mixing effect and avoiding the situation of uneven concentration up and down.

[0037] It should be noted that the number of the first branch pipes 32 is not limited to this and can be adjusted according to the working conditions and usage requirements. Optionally, the first branch pipes 32 are three, or four, or five, or more.

[0038] It should be noted that the number and arrangement mode of the first liquid outlets 323 are not limited to this and can be adjusted according to the working conditions and usage requirements. Optionally, the first liquid outlets 323 are three, or four, or five, or more.

[0039] It should be noted that the arrangement mode of the first liquid outlets 323 is not limited to this and can be adjusted according to the working conditions and usage requirements.

[0040] In other embodiments not shown in the drawings, a plurality of first liquid outlets are spaced along the circumferential direction of the second pipe section.

[0041] In other embodiments not shown in the drawings, a plurality of first liquid outlets are spaced along the height direction and the circumferential direction of the second pipe section.

[0042] It should be noted that the number of the second branch pipes 42 is not limited to this and can be adjusted according to the working conditions and usage requirements. Optionally, the second branch pipes 42 are three, or four, or five, or more.

[0043] It should be noted that the number and arrangement of the second liquid outlets 423 are not limited to this and can be adjusted according to the working conditions and usage requirements. Optionally, the number of the second liquid outlets 423 is three, or four, or five, or more.

[0044] It should be noted that the arrangement of the second liquid outlets 423 is not limited to this and can be adjusted according to the working conditions and usage requirements.

[0045] In other embodiments not shown in the drawings, multiple second liquid outlets are arranged at intervals along the circumferential direction of the fourth pipe section.

[0046] In other embodiments not shown in the drawings, multiple second liquid outlets are arranged at intervals along the height direction and the circumferential direction of the fourth pipe section.

[0047] As Figure 1 shown, the reaction kettle further includes an inlet pipe 50. Among them, the inlet pipe 50 is communicated with the salt solution feed pipe 20, and the communication position of the inlet pipe 50 and the salt solution feed pipe 20 is higher than the outlet of the salt solution feed pipe 20. In this way, the protective gas enters the reaction kettle through the inlet pipe 50. During the process of the salt solution entering the reaction kettle through the salt solution feed pipe 20, the pressure is provided by the protective gas. On the one hand, it ensures that the salt solution can enter the reaction kettle; on the other hand, it improves the feeding efficiency of the salt solution feed pipe 20.

[0048] In this embodiment, when the protective gas enters the inlet pipe 50, it can not only quickly discharge the dissolved oxygen in the solution, but also ensure the positive pressure in the kettle, prevent the external air from entering, and avoid the oxidation of the material.

[0049] Optionally, the height of the outlet is higher than the height of the first liquid outlet 323; and / or, the height of the outlet is higher than the height of the second liquid outlet 423. In this way, the above settings ensure that the feeding methods of the salt solution, ammonia water, and alkali solution are different, and avoid the volatilization of ammonia water and alkali solution, which affects the subsequent reaction.

[0050] As Figure 1 shown, the reaction kettle further includes a stirring device. Among them, the stirring device includes a driving device 60, a stirring rod 70, and a stirring structure 80. The stirring structure 80 is arranged on the stirring rod 70, and the driving device 60 is drivingly connected to the stirring rod 70 to drive the stirring rod 70 to drive the stirring structure 80 to rotate. In this way, the above settings of the stirring device realize the rapid mixing of the salt solution, ammonia water, and alkali solution, and thus improve the reaction efficiency. At the same time, the above settings make the structure of the stirring device simpler, easier to process and realize, and thus reduce the processing cost and processing difficulty of the stirring device.

[0051] Specifically, the stirring rod is inserted through the cover body, and the stirring structure 80 extends into the main body. During the rotation of the stirring structure 80, the salt solution, ammonia water, and alkali solution in the reaction kettle can be mixed.

[0052] Optionally, the driving device 60 is a motor.

[0053] Optionally, there are multiple stirring structures 80, and the multiple stirring structures 80 are arranged at intervals along the length direction and / or circumferential direction of the stirring rod 70. In this way, on the one hand, the above setting makes the distribution of the multiple stirring structures 80 more diverse and flexible, reducing the processing difficulty for the staff; on the other hand, it improves the stirring efficiency of the stirring structure 80 and realizes the rapid mixing of materials.

[0054] In this embodiment, there are two stirring structures 80, and the two stirring structures 80 are arranged at intervals along the length direction of the stirring rod 70, thereby making the structure of the stirring device simpler, easier to process and implement, and reducing the processing cost and difficulty of the stirring device.

[0055] It should be noted that the number of the stirring structures 80 is not limited to this, and can be adjusted according to the working conditions and usage requirements. Optionally, the number of the stirring structures 80 is three, or four, or five, or more.

[0056] As Figure 2 shown, the reaction kettle further includes a first spraying device 90. Among them, the first spraying device 90 is arranged at the liquid inlet of the first main pipe 31, and the first spraying device 90 has at least two first spraying parts 91, and the at least two first spraying parts 91 are arranged in one-to-one correspondence with at least two first branch pipes 32. In this way, the above setting of the first spraying device 90 ensures that the ammonia water enters the reaction kettle in a liquid state, avoids its volatilization and causes precipitation, improves the utilization rate of ammonia, and reduces costs. At the same time, the above setting ensures that the ammonia water sprayed from the first spraying device 90 can smoothly enter each first branch pipe 32 through the first main pipe 31.

[0057] In this embodiment, there are two first spraying parts 91, and the two first spraying parts 91 are arranged in one-to-one correspondence with the two first branch pipes 32.

[0058] It should be noted that the number of the first spraying parts 91 is not limited to this, and can be adjusted according to the working conditions and usage requirements.

[0059] Optionally, the number of the first spraying parts 91 is three, or four, or five, or more.

[0060] Optionally, the reaction kettle further includes at least two first baffles, and the at least two first baffles are arranged in one-to-one correspondence with at least two first injection parts 91. Each first baffle is movably arranged at the corresponding first injection part 91 to block or avoid the first injection part 91. In this way, the use state of the first injection part 91 can be controlled by the first baffle to meet different use requirements.

[0061] In this embodiment, there are two first baffles, and the two first baffles are arranged in one-to-one correspondence with the two first injection parts 91.

[0062] It should be noted that the number of the first baffles is not limited to this and can be adjusted according to the working conditions and use requirements.

[0063] Optionally, the first baffle is three, or four, or five, or more.

[0064] In this embodiment, the reaction kettle further includes a second injection device. The second injection device is arranged at the liquid inlet of the second main pipeline 41. The second injection device has at least two second injection parts, and the at least two second injection parts are arranged in one-to-one correspondence with at least two second branch pipelines 42. In this way, the above arrangement of the second injection device ensures that the alkali solution enters the reaction kettle in a liquid state, avoids its volatilization and precipitation, improves the utilization rate of ammonia, and reduces costs. At the same time, the above arrangement ensures that the alkali solution ejected from the second injection device can smoothly enter each second branch pipeline 42 through the second main pipeline 41.

[0065] In this embodiment, there are two second injection parts, and the two second injection parts are arranged in one-to-one correspondence with the two second branch pipelines 42.

[0066] It should be noted that the number of the second injection parts is not limited to this and can be adjusted according to the working conditions and use requirements.

[0067] Optionally, the second injection part is three, or four, or five, or more.

[0068] Optionally, the reaction kettle further includes at least two second baffles, and the at least two second baffles are arranged in one-to-one correspondence with at least two second injection parts. Each second baffle is movably arranged at the corresponding second injection part to block or avoid the second injection part. In this way, the use state of the second injection part can be controlled by the second baffle to meet different use requirements.

[0069] In this embodiment, there are two second baffles, and the two second baffles are arranged in one-to-one correspondence with the two second injection parts.

[0070] It should be noted that the number of the second baffles is not limited to this and can be adjusted according to the working conditions and use requirements.

[0071] Optionally, the number of the second baffles is three, four, five or more.

[0072] Optionally, along the height direction of the reaction kettle, a plurality of first liquid outlets 323 are arranged in one-to-one correspondence with a plurality of stirring structures 80; the liquid passing area of the upper first liquid outlet 323 among two adjacent first liquid outlets 323 is smaller than that of the lower first liquid outlet 323; and / or, along the height direction of the reaction kettle, a plurality of second liquid outlets 423 are arranged in one-to-one correspondence with a plurality of stirring structures 80; the liquid passing area of the upper second liquid outlet 423 among two adjacent second liquid outlets 423 is smaller than that of the lower second liquid outlet 423. In this way, on the one hand, the above arrangement ensures that the liquid outlet and the stirring structure 80 are at the same height, further avoiding reaction imbalance caused by excessive local concentration; on the other hand, under the action of air pressure, the solution flows out evenly at the liquid outlet, and the solution is fed evenly in the upper and lower layers of the solution, realizing the uniform addition of the liquid to the greatest extent and improving the dispersion effect.

[0073] In this embodiment, both the first liquid outlet 323 and the second liquid outlet 423 are hole-shaped structures, the aperture of the upper first liquid outlet 323 among two adjacent first liquid outlets 323 is smaller than that of the lower first liquid outlet 323, and the aperture of the upper second liquid outlet 423 among two adjacent second liquid outlets 423 is smaller than that of the lower second liquid outlet 423.

[0074] Optionally, an atomizing nozzle is arranged at the liquid outlet of the salt solution feed pipe 20. In this way, the salt solution enters from above the liquid surface through the atomizing nozzle, with a large dispersion area, avoiding the situation of excessive local concentration.

[0075] Optionally, the spraying range of the atomizing nozzle is annular, circular or fan-shaped.

[0076] Optionally, the stirring structure 80 is a stirring paddle, and the stirring paddle is an inclined blade paddle. In this way, the inclined blade paddle can form a radial circulation, quickly mixing the salt solution added to the liquid surface, as much as possible avoiding the situation of excessive local concentration, and thus improving the mixing effect.

[0077] Optionally, the reaction kettle further includes a spoiler, and the spoiler is arranged on the inner wall surface of the main body.

[0078] Optionally, there are a plurality of spoilers, and the plurality of spoilers are arranged at intervals along the circumferential direction of the main body.

[0079] Specifically, the working principle of the reaction kettle is as follows:

[0080] Before the reaction, a certain amount of liquid is added to the reactor as the bottom liquid for the initial material reaction. Three solutions of salt, alkali, and ammonia are added to the liquid, and the reaction is carried out by stirring and mixing. The salt solution contains three metal ions of nickel, cobalt, and manganese. The free metal ions first undergo complexation to form metal complexes, and then the metal complexes react with hydroxide ions to form corresponding hydroxide precipitates. During the above process, the metal ions are prone to oxidation and premature precipitation, so a protective gas needs to be introduced to ensure that there is no oxygen in the reactor.

[0081] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0082] The reactor includes a reactor body, a salt solution feed pipe, an ammonia water feed pipe, and an alkali solution feed pipe. The reactor body includes a main body and a cover body covering the main body. The salt solution feed pipe is provided on the cover body and extends into the main body. In this way, since each first branch pipe of the ammonia water feed pipe includes a first pipe section and a second pipe section that are sequentially connected and arranged at a first angle, and the second pipe section has a plurality of first liquid outlets spaced along the height direction and / or the circumferential direction of the main body. Each second branch pipe of the alkali solution feed pipe includes a third pipe section and a fourth pipe section that are sequentially connected and arranged at a second angle, and the fourth pipe section has a plurality of second liquid outlets spaced along the height direction and / or the circumferential direction of the main body, thereby making the ammonia water feed site and the alkali solution feed site more diverse, avoiding excessive local concentration and affecting the dispersion effect of the precursor particle size, and thus solving the problem that the feed site of the reactor in the prior art is too single, resulting in a relatively wide distribution of the precursor particle size, and enhancing the mixing effect.

[0083] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0084] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0085] It should be noted that the terms "first", "second", etc. in the description, claims and above-mentioned drawings of this application are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described here can be implemented in an order other than those illustrated or described here.

[0086] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A reaction kettle, characterized in that: include: A kettle body (10) comprises a main body and a cover body arranged on the main body; A salt solution feeding pipe (20) is arranged on the cover and extends into the body; an ammonia water feed pipe (30), arranged on the cover body and comprising a first main pipe (31) and at least two first branch pipes (32) which are connected in sequence, each of the first branch pipes (32) comprising a first pipe section (321) and a second pipe section (322) which are connected in sequence and arranged at a first angle, the second pipe section (322) having a plurality of first liquid outlets (323) which are arranged at intervals along the height direction and / or circumferential direction of the body; An alkaline solution feed pipe (40) is arranged on the cover body and comprises a second main pipe (41) and at least two second branch pipes (42) which are connected in sequence, each of the second branch pipes (42) comprises a third pipe section (421) and a fourth pipe section (422) which are connected in sequence and arranged at a second angle, and the fourth pipe section (422) has a plurality of second liquid outlets (423) which are arranged at intervals along the height direction and / or circumferential direction of the body.

2. The reactor according to claim 1, characterized in that: The reactor also includes: The air inlet pipe (50) is connected to the salt solution feeding pipe (20), and the connecting position between the air inlet pipe (50) and the salt solution feeding pipe (20) is higher than the outlet of the salt solution feeding pipe (20).

3. The reaction kettle according to claim 2, characterized in that: The height of the material outlet is higher than the height of the first liquid outlet (323); and / or the height of the material outlet is higher than the height of the second liquid outlet (423).

4. The reactor according to claim 1, characterized in that: The reactor also includes: A stirring device, comprising a driving device (60), a stirring rod (70) and a stirring structure (80), wherein the stirring structure (80) is arranged on the stirring rod (70), and the driving device (60) is drivingly connected to the stirring rod (70) to drive the stirring rod (70) to drive the stirring structure (80) to rotate; There are multiple stirring structures (80), and the multiple stirring structures (80) are arranged at intervals along the length direction and / or circumference of the stirring rod (70).

5. The reactor according to claim 1, characterized in that: The reactor also includes: The first injection device (90) is arranged at the liquid inlet of the first main pipeline (31), and the first injection device (90) has at least two first injection parts (91), and the at least two first injection parts (91) are arranged in a one-to-one correspondence with the at least two first branch pipelines (32).

6. The reactor according to claim 5, characterized in that: The reactor also includes: At least two first baffles are provided, and at least two of the first baffles are provided in one-to-one correspondence with at least two of the first injection parts (91). Each of the first baffles can be movably provided at the first injection part (91) corresponding thereto to block or avoid the first injection part (91).

7. The reactor according to claim 1, characterized in that: The reactor also includes: The second injection device is arranged at the liquid inlet of the second main pipeline (41), and the second injection device has at least two second injection parts, and the at least two second injection parts are arranged in a one-to-one correspondence with the at least two second branch pipelines (42).

8. The reactor according to claim 7, characterized in that: The reactor also includes: At least two second baffles are arranged in one-to-one correspondence with at least two second injection parts, and each second baffle can be movably arranged at the corresponding second injection part to block or avoid the second injection part.

9. The reactor according to claim 4, characterized in that: Along the height direction of the reactor, the plurality of first liquid outlets (323) are arranged in one-to-one correspondence with the plurality of stirring structures (80); the liquid flow area of ​​the upper first liquid outlet (323) of two adjacent first liquid outlets (323) is smaller than the liquid flow area of ​​the lower first liquid outlet (323); and / or, along the height direction of the reactor, the plurality of second liquid outlets (423) are arranged in one-to-one correspondence with the plurality of stirring structures (80); the liquid flow area of ​​the upper second liquid outlet (423) of two adjacent second liquid outlets (423) is smaller than the liquid flow area of ​​the lower second liquid outlet (423).

10. The reaction kettle according to claim 4, characterized in that: An atomizing nozzle is arranged at the liquid outlet of the salt solution feeding pipe (20).

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