Synthesis kettle and vertical feed pipe

Abstract

The embodiment of the present application discloses a synthesis kettle and a vertical feeding pipe, wherein the vertical feeding pipe is provided with a first feeding hole group on at least one first element line of an inner sleeve pipe, at least one first feeding hole group is arranged on each first element line, at least one second feeding hole group is arranged on at least one second element line of an outer sleeve pipe, and at least one second feeding hole group is arranged on each second element line. The inner sleeve pipe and the outer sleeve pipe are relatively rotated, so that the first element line of the inner sleeve pipe, on which the first feeding hole group capable of meeting the required feeding height is arranged, is aligned with the feeding direction, meanwhile, the second element line of the outer sleeve pipe, on which the second feeding hole group capable of meeting the required feeding height is arranged, is aligned with the feeding direction, the first feeding hole group and the second feeding hole group are communicated, so that the vertical feeding pipe meets the required feeding height and the feeding direction. The vertical feeding pipe disclosed by the present application can adjust the feeding direction and the feeding height, thereby improving the uniformity of material mixing.

Description

Technical Field

[0001] This application relates to the field of chemical equipment technology, and in particular to a synthesis reactor and a vertical feed pipe. Background Technology

[0002] Lithium-ion batteries are gradually replacing lead-acid batteries due to their advantages such as stable voltage, high capacity, high energy density, low self-discharge, long cycle life, low consumption, and environmental friendliness. They are widely used in electric vehicles, power tools, mobile phones, and laptops.

[0003] As a key material that determines the performance of lithium-ion batteries, the research and development and production of cathode materials are of paramount importance, and the quality and physicochemical properties of ternary precursors largely determine the performance of cathode materials.

[0004] During precursor synthesis, the feed pipe is mainly located at the bottom or top of the synthesis vessel, corresponding to bottom feeding or top feeding. However, neither bottom feeding nor top feeding is conducive to uniform mixing of materials during the reaction process.

[0005] To improve the uniformity of material mixing, it is necessary to change the feeding position and feeding direction of the material entering the synthesis reactor. Summary of the Invention

[0006] This application discloses a vertical feed pipe to change the feed position and feed direction of materials entering the synthesis reactor. This application also discloses a synthesis reactor.

[0007] To achieve the above objectives, this application provides a vertical feed pipe, including an inner sleeve and an outer sleeve that are sleeved and connected together.

[0008] The inner sleeve is provided with a first feed hole group, and the first feed hole group is provided on N first generatrices of the inner sleeve. Each first generatrice is provided with up to M groups of the first feed hole group, and the included angle between adjacent first generatrices of the first feed hole group is set as α.

[0009] The outer tube is provided with a second group of feed holes. Each of the Q second generatrices of the outer tube has at least P groups of feed holes. The included angle between adjacent second generatrices of the second feed hole group is set to β, where β ≠ α / n, α > 0°, and β > 0°.

[0010] The inner sleeve and the outer sleeve can rotate relative to each other, so that the second feed hole group can communicate with the first feed hole group to adjust the feed height and feed direction of the vertical feed pipe;

[0011] Where M≥1, N≥1, P≥1, Q≥1, and M, N, P, Q, and n are all positive integers.

[0012] When N=1, Q≠1, the first feed hole group of group M is arranged sequentially from the upper end to the lower end of the inner sleeve along the axis of the inner sleeve; when Q=1, N≠1, the second feed hole group of group P is arranged sequentially from the upper end to the lower end of the outer sleeve along the axis of the outer sleeve.

[0013] Preferably, in the above-mentioned vertical feed pipe, the top of the inner sleeve is provided with a first mark, which corresponds to the position of the first generatrix where the first feed hole group is provided;

[0014] The top of the outer tube is provided with a second mark, which corresponds to the position of the second main line where the second feed hole group is located.

[0015] Preferably, in the above-mentioned vertical feed pipe, the gap between the inner sleeve and the outer sleeve is 0.01-1.0 mm.

[0016] Preferably, in the above-mentioned vertical feed pipe, the first feed hole group includes at least one first feed hole, the distance between adjacent first feed hole groups is greater than the distance between two adjacent first feed holes, and the number of first feed holes in the first feed hole groups on the same first line may be the same or different.

[0017] Preferably, in the above-mentioned vertical feed pipe, the second feed hole group includes at least one second feed hole, the distance between adjacent second feed hole groups is greater than the distance between two adjacent second feed holes, and the number of second feed holes in the second feed hole group on the same second line is the same or different.

[0018] Preferably, in the above-mentioned vertical feed pipe, the distance between adjacent first feed holes is ≤1cm;

[0019] The distance between adjacent second feed holes is ≤1cm.

[0020] Preferably, in the above-mentioned vertical feed pipe, the diameter of the second feed hole is greater than or equal to the diameter of the first feed hole.

[0021] Preferably, in the above-mentioned vertical feed pipe, the inner sleeve is a titanium pipe, a stainless steel pipe, an engineering plastic, etc.

[0022] Preferably, in the above-mentioned vertical feed pipe, the outer sleeve is a titanium pipe, a stainless steel pipe, or an engineering plastic pipe.

[0023] A synthesis reactor includes a vertical feed pipe, wherein the vertical feed pipe is the vertical feed pipe described in any of the above embodiments.

[0024] The vertical feed pipe provided in this application embodiment has a first feed hole group on at least one first element line of the inner sleeve, with at least one first feed hole group on each first element line, and a second feed hole group on at least one second element line of the outer sleeve, with at least one second feed hole group on each second element line. The inner and outer sleeves rotate relative to each other, aligning the first element line of the first feed hole group on the inner sleeve, which meets the required feed height, with the feed direction. Simultaneously, aligning the second element line of the second feed hole group on the outer sleeve, which also meets the required feed height, with the feed direction. The first and second feed hole groups are connected, thus the vertical feed pipe satisfies both the required feed height and feed direction. The vertical feed pipe disclosed in this application adjusts the feed direction by rotating the inner and outer sleeves, and adjusts the feed height by connecting the first feed hole groups on different first element lines of the inner sleeve with the corresponding second feed hole groups on the outer sleeve. This simultaneous adjustment of the feed height and feed direction improves the uniformity of material mixing.

[0025] This application also provides a synthesis reactor, including a vertical feed pipe, which is the vertical feed pipe described in any of the above embodiments. Since the vertical feed pipe has the aforementioned technical effects, the synthesis reactor with this vertical feed pipe also has the same technical effects, and will not be elaborated further here. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some examples or embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort, and this application can be applied to other similar scenarios based on the provided drawings. Unless obvious from the linguistic context or otherwise specified, the same reference numerals in the drawings represent the same structures or operations.

[0027] Figure 1 This is a top view of the vertical feed pipe of this application;

[0028] Figure 2 This is a schematic diagram of the structure of the vertical feed pipe of this application, where the feed is located in the first radial position;

[0029] Figure 3 This is a schematic diagram of the structure of the vertical feed pipe of this application, where the feed is located at the second radial position;

[0030] Figure 4 This is a schematic diagram of the structure of the vertical feed pipe of this application, where the feed is located at the third radial position;

[0031] Figure 5This is a schematic diagram of the structure of the vertical feed pipe of this application, where the feed is located at the fourth radial position;

[0032] Figure 6 This is a schematic diagram of the structure of the vertical feed pipe of this application, where the feed is located at the fifth radial position.

[0033] The attached diagram is described below:

[0034] 1. Inner sleeve; 11. First feed hole group; 2. Outer sleeve; 22. Second feed hole group. Detailed Implementation

[0035] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the application and not intended to limit it. The described embodiments are only a part of the embodiments of the present application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without inventive effort are within the scope of protection of the present application.

[0036] It should be noted that, for ease of description, only the parts relevant to the application are shown in the accompanying drawings. Unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0037] It should be understood that the terms "system," "apparatus," "unit," and / or "module" used in this application are a method of distinguishing different components, elements, parts, sections, or assemblies at different levels. However, if other terms can achieve the same purpose, they may be replaced by other expressions.

[0038] As indicated in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "a," and / or "the" are not specifically singular and may include the plural. Generally, the terms "comprising" and "including" only indicate the inclusion of expressly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements. An element defined by the phrase "comprising an..." does not exclude the presence of other identical elements in the process, method, product, or apparatus that includes the element.

[0039] In the description of the embodiments of this application, unless otherwise stated, " / " means "or", for example, A / B can mean A or B; "and / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Furthermore, in the description of the embodiments of this application, "multiple" refers to two or more.

[0040] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0041] Flowcharts are used in this application to illustrate the operations performed by the system according to embodiments of this application. It should be understood that the preceding or following operations are not necessarily performed precisely in sequence. Instead, the steps can be processed in reverse order or simultaneously. Furthermore, other operations can be added to these processes, or one or more steps can be removed from them.

[0042] Please see Figures 1-6 .

[0043] This application discloses a vertical feed tube, including an inner sleeve 1 and an outer sleeve 2 that are sleeved and connected. The outer sleeve 2 is sleeved on the inner sleeve 1 and the two are fitted with a clearance, and the inner sleeve 1 and the outer sleeve 2 can rotate relative to each other.

[0044] In this application, the inner sleeve 1 and the outer sleeve 2 are sleeved and connected and rotated. Preferably, both the inner sleeve 1 and the outer sleeve 2 are cylindrical sleeves. The outer sleeve 2 is clearance-fitted with the inner sleeve 1 and is arranged coaxially. The inner sleeve 1 can rotate around its own axis, and the outer sleeve 2 can rotate around its own axis. The outer sleeve 2 can rotate relative to the inner sleeve 1 around the axis of the inner sleeve 1, and the rotations of the inner sleeve 1 and the outer sleeve 2 are independent of each other and do not interfere with each other.

[0045] The ability for relative rotation between the inner sleeve 1 and the outer sleeve 2 means that the inner sleeve 1 rotates while the outer sleeve 2 remains stationary, or the inner sleeve 1 remains stationary while the outer sleeve 2 rotates, or both the inner sleeve 1 and the outer sleeve 2 rotate, but at different speeds. The vertical feed pipe disclosed in this application has a first feed hole group 11 provided on the inner sleeve 1. The first feed hole groups 11 are provided on N first generatrices of the inner sleeve 1, with up to M groups of first feed hole groups 11 provided on each first generatrice. The included angle between adjacent first generatrices of the first feed hole group 11 is set to α.

[0046] The outer tube 2 is provided with a second feed hole group 22. The Q second generatrix of the outer tube 2 are provided with a second feed hole group 22. Each second generatrix is ​​provided with a maximum of P groups of second feed hole groups 22. The included angle between adjacent second generatrixes of the second feed hole group 22 is set to β, and β≠α / n.

[0047] Where M≥1, N≥1, P≥1, Q≥1, and M, N, P, Q and n are all positive integers.

[0048] This application also requires that when N=1, Q≠1, and the first feed hole group 11 of group M is arranged sequentially from the upper end of the inner sleeve 1 to the lower end of the inner sleeve 1 along the axis of the inner sleeve 1.

[0049] When Q=1, N≠1, the second feed hole group 22 of group P is arranged sequentially from the upper end of the outer tube 2 to the lower end of the outer tube 2 along the axis of the outer tube.

[0050] The inner sleeve 1 and the outer sleeve 2 can rotate relative to each other, so that the second feed hole group 22 can communicate with the first feed hole group 11. Since the inner sleeve 1 and the outer sleeve 2 can rotate relative to each other, the feeding direction of the vertical feed pipe can be changed. The first feed hole group 11 and the second feed hole group 22 are located at different axial heights, thereby changing the feeding height of the vertical feed pipe.

[0051] When N=1 and Q≠1, M groups of first feed hole groups 11 are provided on one first elemental line of the inner sleeve 1, and second feed hole groups are provided on at least two second elemental lines of the outer sleeve 2. Each second elemental line has at most P groups of second feed hole groups 22. It should be noted that the axial height of the M groups of first feed hole groups 11 on the first elemental line can cover the axial height of all second feed hole groups 22 on the outer sleeve, ensuring that when the inner sleeve 1 and outer sleeve 2 rotate relative to each other, the P groups of second feed hole groups on different second elemental lines can communicate with the first feed hole groups 11 on the first elemental line respectively. In this embodiment, M≥P. The number of second feed hole groups provided on the second elemental lines is selected according to actual needs, with a maximum of P groups and a minimum of 1 group.

[0052] Specifically, when N=1, M=3, Q=3, P=1, the inner sleeve 1 has 3 sets of first feed hole groups 11 on one first element line, and the outer sleeve 2 has 1 set of second feed hole groups on each of the 3 second element lines. The axial height of the second feed hole groups 22 on the 3 second element lines corresponds to the axial height of the 3 sets of first feed hole groups 11 on the first element line. The inner sleeve 1 and the outer sleeve 2 rotate relative to each other, so that the second feed hole groups 22 on the 3 second element lines are connected to the first feed hole groups 11 on the first element line with the same axial height according to the feeding needs. In this embodiment, the second feed hole groups 22 on the second element line are connected to the first feed hole groups 11 on the first element line.

[0053] When N=1, M=3, Q=2 or 3, P=2, the inner sleeve 1 has 3 sets of first feed hole groups 11 on one first element line, and the outer sleeve 2 has 2 or 3 sets of second feed hole groups 22 on 2 or 3 second element lines. Each second element line has at most 2 sets of second feed hole groups. The axial height of the second feed hole groups 22 on the 2 or 3 second element lines corresponds to the axial height of the 3 sets of first feed hole groups 11 on the first element line. The inner sleeve 1 and the outer sleeve 2 rotate relative to each other so that the second feed hole groups 22 on the three second element lines are connected to the first feed hole groups 11 on the first element line with the same axial height as the feeding needs. In this embodiment, at most 2 sets of second feed hole groups 22 on the second element line are connected to 2 sets of first feed hole groups 11 on the first element line.

[0054] When N=1, M=3, Q=2 or 3, and P=3, three sets of first feed hole groups 11 are provided on one first elemental line of the inner sleeve 1, and two or three sets of second feed hole groups 22 are provided on two or three second elemental lines of the outer sleeve 2. Each second elemental line has at most three sets of second feed hole groups 22. The axial height of the second feed hole groups 22 on the two or three second elemental lines corresponds to the axial height of the three sets of first feed hole groups 11 on the first elemental line. The inner sleeve 1 and the outer sleeve 2 rotate relative to each other, so that the second feed hole groups 22 on the three second elemental lines are connected to the first feed hole groups 11 on the first elemental line with the same axial height as the feeding needs. In this embodiment, at most three sets of second feed hole groups 22 on the second elemental line are connected to the three sets of first feed hole groups 11 on the first elemental line.

[0055] When Q=1, N≠1. At least two first linear guidelines of the inner sleeve 1 are provided with first feed hole groups 11, and each first linear guideline is provided with at most M groups of first feed hole groups 11. One second linear guideline of the outer sleeve is provided with P groups of second feed hole groups 22. It should be noted that the axial height of the P groups of second feed hole groups 22 on the second linear guideline can cover the axial height of all first feed hole groups 11 on the inner sleeve 1, ensuring that when the inner sleeve 1 and outer sleeve 2 rotate relative to each other, the first feed hole groups 11 on different first linear guidelines can communicate with the second feed hole groups 22 on the second linear guideline. In this embodiment, P≥M. The number of first feed hole groups provided on the first linear guidelines is selected according to actual needs, with a maximum of M groups and a minimum of 1 group.

[0056] Specifically, when Q=1, P=3, N=3, M=1, the outer sleeve 2 has 3 sets of second feed hole groups 22 on one second elemental line, and the inner sleeve 1 has 1 set of first feed hole groups 11 on each of the 3 first elemental lines. The axial height of the first feed hole groups 11 on the 3 first elemental lines corresponds to the axial height of the 3 sets of second feed hole groups 11 on the second elemental lines. The inner sleeve 1 and the outer sleeve 2 rotate relative to each other, so that the first feed hole groups 11 on the 3 first elemental lines are connected to the second feed hole groups 22 on the second elemental lines with the same axial height as the feeding needs. In this embodiment, the first feed hole group 11 on the first elemental line is connected to the second feed hole group 22 on the second elemental line.

[0057] When Q=1, P=3, N=2 or 3, M=2, the outer sleeve 2 has 3 sets of second feed hole groups 22 on one second elemental line, and the inner sleeve 1 has 1 set of first feed hole groups 11 on 2 or 3 first elemental lines. Each first elemental line has at most 2 sets of first feed hole groups. The axial height of the first feed hole groups 11 on the 2 or 3 first elemental lines corresponds to the axial height of the 3 sets of second feed hole groups 22 on the second elemental line. The inner sleeve 1 and the outer sleeve 2 rotate relative to each other so that the first feed hole groups 22 on the three first elemental lines are connected to the second feed hole groups 22 on the second elemental line with the same axial height as the feeding needs. In this embodiment, at most 2 sets of first feed hole groups 11 on the first elemental line are connected to 2 sets of second feed hole groups 22 on the second elemental line.

[0058] When Q=1, P=3, N=2 or 3, and M=3, three sets of second feed hole groups 22 are provided on one second elemental line of the outer sleeve 2, and first feed hole groups 11 are provided on two or three first elemental lines of the inner sleeve 1. At most three sets of first feed hole groups 11 are provided on each first elemental line. The axial height of the first feed hole groups 11 on the two or three first elemental lines corresponds to the axial height of the three sets of second feed hole groups 22 on the second elemental line. The inner sleeve 1 and the outer sleeve 2 rotate relative to each other, so that the first feed hole groups 11 on the three first elemental lines are connected to the second feed hole groups 22 on the second elemental line with the same axial height as the feeding needs. In this embodiment, at most three sets of first feed hole groups 11 on the first elemental line are connected to three sets of second feed hole groups 22 on the second elemental line.

[0059] This application provides up to M groups of first feed hole groups 11 on each first generatrix, and the M groups of first feed hole groups 11 are located at different axial heights, that is, the first feed hole group 11 on the first generatrix has M axial heights.

[0060] Each second generatrix is ​​provided with up to P groups of second feed holes 22, and M groups of second feed holes 22 are located at different axial heights, that is, the second feed hole groups 22 of the second generatrix have P axial heights.

[0061] The first feed hole group 11 and the second feed hole group 22 are described here. The first feed hole group 11 is composed of a first feed hole. The first feed hole group 11 can be composed of only one first feed hole or multiple first feed holes. Preferably, the first feed hole group 11 has multiple first feed holes. The multiple first feed holes are arranged along the axial direction of the inner sleeve 1. The distance between adjacent first feed holes in each group of first feed hole groups 11 is equal. The distance between adjacent first feed hole groups 11 is greater than the distance between adjacent first feed holes in each group of first feed hole groups. The distance between adjacent first feed hole groups 11 on the same first generatrix can be equal or unequal. The number of first feed holes included in first feed hole groups 11 located at different axial heights on the same first generatrix can be the same or different.

[0062] The second feed hole group 22 is composed of a second feed hole. The second feed hole group 22 can be composed of only one second feed hole or multiple second feed holes. Preferably, the second feed hole group 22 has multiple second feed holes, which are arranged along the axial direction of the outer sleeve 2. The distance between adjacent second feed holes in each group of second feed hole groups 22 is equal, and the distance between adjacent second feed hole groups 22 is greater than the distance between adjacent second feed holes in each group of second feed hole groups. The distance between adjacent second feed hole groups 22 on the same second generatrix can be equal or unequal. The number of second feed holes included in second feed hole groups 22 located at different axial heights on the same second generatrix can be the same or different.

[0063] The diameters of the first feed hole and the second feed hole are 0.5mm to 5mm. Preferably, the diameter of the second feed hole is greater than or equal to the diameter of the first feed hole.

[0064] The distance between two adjacent first feed holes in the same first feed hole group 11 is ≤1cm, and the distance between two adjacent second feed holes in the same second feed hole group 22 is ≤1cm.

[0065] When N≥2, M≥2, Q≥2 and P≥2

[0066] At least two first linear lines of the inner sleeve 1 are provided with first feed hole groups 11, and each first linear line is provided with up to M groups of first feed hole groups 11. The M groups of first feed hole groups 11 with different axial heights can be combined arbitrarily to achieve different feed heights.

[0067] At least two second linear lines of the outer sleeve are provided with second feed hole groups 22, and each second linear line is provided with up to P groups of second feed hole groups 22. The combination of the P groups of second feed hole groups 22 with different axial heights is the same as the combination of the first feed hole group 11 on the inner sleeve 1, so as to ensure that the second feed hole group 22 of the outer sleeve 2 can communicate with the first feed hole group 1 of the inner sleeve 1.

[0068] Rotating the inner sleeve 1 and the outer sleeve 2 changes the feeding direction of the vertical feed pipe. The feeding height of the vertical feed pipe is changed by connecting the first feeding hole group 11 on the first line of the inner sleeve 1 with the second feeding hole group 22 on the corresponding second line of the outer sleeve 2 through the first feeding hole group 11 on the first line of the inner sleeve 1. The vertical feed pipe disclosed in this application can realize the adjustment of the feeding direction and the feeding height, and the feeding direction and the feeding height can be adjusted separately according to actual needs.

[0069] It should be noted that the axial height of the second feed hole group 22 of group P on the second element line can cover the axial height of all the first feed hole groups 11 on the inner sleeve 1, so as to ensure that when the inner sleeve 1 and the outer sleeve 2 rotate relative to each other, the first feed hole groups 11 on different first element lines can be connected with the second feed hole groups 22 corresponding to the axial height on the second element line.

[0070] Preferably, the number of axial heights of the first feed hole group 11 on the inner sleeve 1 is equal to the number of axial heights of the second feed hole group 22 on the outer sleeve, i.e., M = P.

[0071] The feeding direction of the vertical feed pipe is selected by those skilled in the art according to actual needs. After the feeding direction of the vertical feed pipe is determined, the inner sleeve 1 and the outer sleeve 2 are rotated respectively according to the feeding height requirements of the vertical feed pipe, so that the first generatrix of the first feed hole group 11 on the inner sleeve 1 that meets the feeding height requirements is aligned with the feeding direction, and the second generatrix of the second feed hole group 22 on the outer sleeve 2 that meets the feeding height requirements is aligned with the first generatrix aligned with the feeding direction. This application does not restrict the order in which the inner sleeve 1 and the outer sleeve 2 are rotated.

[0072] The vertical feed pipe disclosed in this application, when satisfying the feeding height and feeding direction, does not necessarily have all the first feed hole group 11 on the inner sleeve 1 connected to the second feed hole group 22 on the outer sleeve 2.

[0073] Preferably, the number, spacing, and diameter of the first feed holes in the first feed hole group 11, which connects the outer sleeve 2 and the inner sleeve 1, are equal to the number, spacing, and diameter of the second feed holes in the second feed hole group 22.

[0074] In an embodiment where multiple sets of first feed hole groups 11 are provided on the first line of the inner sleeve 1, the spacing between adjacent first feed hole groups 11 is equal. In an embodiment where multiple sets of second feed hole groups 22 are provided on the outer sleeve 2, the distance between adjacent second feed hole groups 22 is equal.

[0075] The number of first feed hole groups 11 located on different first generatrices of the inner sleeve 1 can be the same or different.

[0076] The number of second feed hole groups 22 located on different second element lines of the outer tube 2 can be the same or different.

[0077] In this application, after the second feed hole group 22 on a certain second element line of the outer sleeve 2 is connected to the first feed hole group 11 on the first element line of the inner sleeve 1, the second feed hole group 22 on other second element lines of the outer sleeve 2 is not connected to the first feed hole group 11 on other positions of the first element line of the inner sleeve 1, ensuring that the vertical feed pipe has only one feeding direction and one feeding height.

[0078] In this scheme, the included angle between adjacent first generatrices of the first feed hole group 11 is set as α, and the included angle between adjacent second generatrices of the second feed hole group 22 is set as β. Preferably, β≠α / n, α>0°, β>0°, where n is a positive integer.

[0079] The vertical feed pipe disclosed in this application has a first feed hole group 11 arranged at least at two axial heights and at least two radial directions on the inner sleeve 1, and a second feed hole group 22 arranged at at least two axial heights and at least two radial directions on the outer sleeve 2. Simultaneously, at least one set of first feed hole groups 11 is arranged on the first linear axis of the inner sleeve 1, and at least one set of second feed hole groups 22 is arranged on the second linear axis of the outer sleeve 2. Rotating the inner sleeve 1 aligns the first feed hole group 11 with the stirring shaft, and rotating the outer sleeve 2 connects the second feed hole group 22 of the outer sleeve 2 with the first feed hole group 11 aligned with the stirring shaft. The axial height of the first feed hole group 11 and the axial height of the second feed hole group 22 determine the feed position of the vertical feed pipe in the vertical direction. This application allows for feed not only at a single position in the vertical direction but also at several positions, enabling adjustment or combination of feed positions to achieve flexibility in vertical feed.

[0080] In this application, the bottom of the vertical feed pipe is 20cm from the bottom of the synthesis reactor.

[0081] In order to further optimize the above technical solution, the top of the inner sleeve 1 of this application is provided with a first mark, which corresponds to the position of the first line of the first feed hole group 11.

[0082] The top of the outer tube 2 is provided with a second mark, which corresponds to the position of the second line where the second feed hole group 22 is provided.

[0083] The first and second markings reduce the difficulty of adjusting the feeding direction and feeding height of the vertical feed pipe.

[0084] The first identifier not only indicates that the first feed hole group 11 is located at the position of the first generatrix, but also indicates the axial height and number of feed hole groups 11 on the first generatrix.

[0085] The second identifier not only indicates that the second feed hole group 22 is located at the position of the second generatrix, but also indicates the axial height and number of the second feed hole group 22 on the second generatrix.

[0086] Preferably, the first markings on different first element lines are of different colors, with each color indicating the axial height and number of sets of the first feed hole group 11 on the corresponding first element line; similarly, the second markings on different second element lines are of different colors, corresponding to the axial height and number of sets of the second feed hole group 11 on the corresponding second element line. The first feed hole group 11 on the corresponding first element line and the second feed hole group 22 on the corresponding second element line use the same color for both markings, facilitating practical adjustment.

[0087] The gap between the inner sleeve 1 and the outer sleeve 2 is very small. In some embodiments of this application, the gap between the inner sleeve 1 and the outer sleeve 2 is 0.01-1.0 mm.

[0088] In some embodiments of this application, the inner sleeve 1 is made of titanium, stainless steel, or engineering plastic, etc., and the outer sleeve 2 is made of titanium, stainless steel, or engineering plastic, etc. The inner sleeve 1 and the outer sleeve 2 can be made of the same material or different materials.

[0089] In some embodiments of this application, α is 30-90°, β is 15-45°, and α > β.

[0090] The included angle between two adjacent first feed hole groups 11 along the circumferential direction of the inner sleeve 1 can be equal or unequal.

[0091] The included angle between two adjacent second feed groups along the circumferential direction of the outer sleeve 2 can be equal or unequal.

[0092] In some embodiments of this application, first feed hole groups 11 are provided along the four radial directions of the inner sleeve 1, and the included angle between two adjacent first feed hole groups 11 is 90°.

[0093] A second feed hole group 22 is provided along the four radial directions of the outer sleeve 2, and the included angles between two adjacent second feed hole groups 22 are 10°, 20°, 45° and 75° respectively.

[0094] The spacing between the first feed holes in the first feed hole group 11 of this application is equal, and the spacing between the second feed holes in the second feed hole group 22 is equal.

[0095] Compared with the prior art, the vertical feed pipe in the prior art only includes a single feed pipe, which has the problem of limited feeding position. The vertical feed pipe disclosed in this application can meet the functions of bottom feeding, top feeding, and feeding at any position in the middle. Moreover, these feeding positions can be easily and quickly switched as needed without the need for a separate vertical feed pipe. This improves the flexibility of switching feeding positions in the synthesis reactor during the synthesis process, thereby improving the flexibility of synthesis process control and benefiting the sphericity, D50 stability, etc. of the final product.

[0096] like Figure 1-6 An embodiment of a vertical feed pipe is disclosed. In this embodiment, a first feed hole group 11 is provided on three axial heights and five first linear lines of the inner sleeve 1, and a second feed hole group 22 is provided on three axial heights and five second linear lines of the outer sleeve 2.

[0097] The three axial heights of the inner sleeve 1 are the bottom, middle and top of the inner sleeve 1, respectively; correspondingly, the three axial heights of the outer sleeve 2 are the bottom, middle and top of the outer sleeve 2.

[0098] The inner sleeve 1 has a first radial position and a first feed hole group 11, which is located at the bottom of the inner sleeve 1; the inner sleeve 1 has a second radial position and a first feed hole group 11, which is located at the top of the inner sleeve 1; the inner sleeve 1 has a third radial position and a first feed hole group 11, which is located in the middle of the inner sleeve 1; the inner sleeve 1 has a fourth radial position and a first feed hole group 11, which consists of three groups, and the first feed hole groups 11 are evenly distributed along the axial direction of the inner sleeve 1, with the number of first feed holes in the three groups being equal; the inner sleeve 1 has a fifth radial position and a first feed hole group 11, which consists of three groups, and the number of first feed holes in the first feed hole groups 11 located at the top and middle is less than the number of first feed holes in the first feed hole groups 11 located at the bottom.

[0099] The outer sleeve 2 has one set of second feed hole groups 22 at its first radial position, located at the bottom of the outer sleeve 2; one set of second feed hole groups 22 at its second radial position, located at the top of the outer sleeve 2; one set of second feed hole groups 22 at its third radial position, located in the middle of the outer sleeve 2; three sets of second feed hole groups 22 at its fourth radial position, evenly distributed along the axial direction of the inner sleeve 1, with the number of second feed holes in each of the three sets being equal; and three sets of second feed hole groups 22 at its fifth radial position, with the number of second feed holes in the second feed hole groups 22 located at the top and middle being less than the number of second feed holes in the second feed hole groups 22 located at the bottom.

[0100] The following is a method of using an embodiment:

[0101] 1. When the synthesis reaction requires bottom feeding, the first feed port group 11 located at the bottom of the inner sleeve 1 and the second feed port group 22 located at the bottom of the outer sleeve 2 need to be connected. Rotate the inner sleeve 1 and the outer sleeve 2 to align the first radial position mark (green) of the inner sleeve 1 and the second radial position mark (green) of the outer sleeve 2. Figure 4 As shown, the inner sleeve 1 is rotated so that the first mark (green) on the top of the inner sleeve 1 is aligned with the feeding direction. Then the outer sleeve 2 is rotated so that the second mark (green) on the top of the outer sleeve 2 is aligned with the first mark (green) on the top of the inner sleeve 1. The feed holes on the inner sleeve 1 and the outer sleeve 2 are overlapped, realizing bottom feeding. At this time, the reaction raw materials enter the reaction system from the bottom of the synthesis vessel. Since it is far from the overflow port, there is a longer reaction time, which is conducive to the growth of reaction particles.

[0102] 2. When the synthesis reaction requires top feeding, the first feed port group 11 located at the top of the inner sleeve 1 and the second feed port group 22 located at the top of the outer sleeve 2 need to be connected. Rotate the inner sleeve 1 and the outer sleeve 2 so that the first mark (in red) of the second radial position of the inner sleeve 1 and the second mark (in red) of the second radial position of the outer sleeve 2 are aligned, such as... Figure 2 As shown, the inner sleeve 1 is rotated so that the first mark (red) on the top of the inner sleeve 1 is aligned with the feeding direction. Then the outer sleeve 2 is rotated so that the second mark (red) on the top of the outer sleeve 2 is aligned with the first mark (red) on the top of the inner sleeve 1. The feed holes on the inner sleeve 1 and the outer sleeve 2 are overlapped, realizing top feeding. At this time, the reaction raw materials enter the reaction system from the top of the synthesis vessel. It is closer to the overflow port and has a shorter reaction time, which is beneficial to increase the particle size distribution of the reaction particles.

[0103] 3. When uniform feeding is required for the synthesis reaction, the first feed hole group 11 located at the top, middle, and bottom of the inner sleeve 1 needs to be connected to the second feed hole group 22 located at the top, middle, and bottom of the outer sleeve 2, respectively. The number of feed holes in the first feed hole group 11 and the second feed hole group 22 at different axial heights should be equal. Rotating the inner sleeve 1 and the outer sleeve 2 will reveal the first mark (in blue) at the third radial position of the inner sleeve 1 and the second mark (in blue) at the third radial position of the outer sleeve 2. Figure 5As shown, the inner sleeve 1 is rotated so that the first mark (blue) on the top of the inner sleeve 1 is aligned with the feeding direction. Then the outer sleeve 2 is rotated so that the second mark (blue) on the top of the outer sleeve 2 is aligned with the first mark (blue) on the top of the inner sleeve 1. The feed holes on the inner sleeve 1 and the outer sleeve 2 are overlapped, achieving uniform feeding. At this time, the reaction raw materials enter the reaction system from various parts of the synthesis vessel. The stirring paddle can fully disperse the reaction raw materials, which is conducive to the uniform dispersion of materials in the reaction system, avoids the agglomeration between material particles, improves dispersibility, and at the same time ensures that there is a certain particle size distribution between particles.

[0104] 4. When the synthesis reaction requires non-uniform feeding, the first feed port group 11 located at the top, middle, and bottom of the inner sleeve 1 needs to be connected to the second feed port group 22 located at the top, middle, and bottom of the outer sleeve 2, respectively. The number of feed ports in the first feed port group 11 and the second feed port group 22 near the top is less than the number of feed ports in the first feed port group 11 and the second feed port group 22 near the bottom. Rotating the inner sleeve 1 and the outer sleeve 2 will cause the first and second markings corresponding to the fourth radial position to be black. Figure 6 As shown, the inner sleeve 1 is rotated so that the first mark (black) on the top of the inner sleeve 1 is aligned with the feeding direction. Then the outer sleeve 2 is rotated so that the second mark (black) on the top of the outer sleeve 2 is aligned with the first mark (black) on the top of the inner sleeve 1. The feed holes on the inner and outer sleeves 2 are overlapped, achieving non-uniform feeding. At this time, the reaction raw materials enter the reaction system from various parts of the synthesis vessel. The stirring paddle can fully disperse the reaction raw materials, which is conducive to the uniform dispersion of materials in the reaction system, avoids the agglomeration between material particles, and improves particle dispersibility. At the same time, the bottom feed is more than the middle and top feed, and it can also meet the requirements of lower particle size distribution.

[0105] The following embodiments, in conjunction with the preparation process of ternary precursors, specifically illustrate the beneficial effects of the vertical feed pipe of this application.

[0106] Example 1

[0107] 1. Prepare a mixed solution of soluble nickel sulfate, cobalt sulfate, and manganese sulfate according to stoichiometric ratio, wherein the total molar concentration of metal ions in the mixed solution is 1.8 mol / L, and the molar ratio of nickel, cobalt, and manganese is 8:1:1; prepare a precipitant solution with a concentration of 5.0 mol / L using sodium hydroxide solution; and prepare a complexing agent solution with a concentration of 10 mol / L using ammonia solution.

[0108] 2. Control the stirring speed at 30Hz and the temperature at 60℃, and introduce nitrogen gas into the synthesis reactor, controlling the nitrogen flow rate at 8m³ / min. 3 / h;

[0109] 3. Rotate the inner sleeve 1 of the feed, alkali, and ammonia inlet pipes, as follows: Figure 5 As shown, the first mark (black) on the top of the inner sleeve 1 is aligned with the stirring shaft. Then the outer sleeve 2 is rotated so that the second mark (black) on the top of the outer sleeve 2 is aligned with the first mark (black) on the top of the inner sleeve 1. The feed holes on the inner and outer sleeves 2 are overlapped to achieve non-uniform feeding.

[0110] 4. Control the ammonia value of the synthesis reaction to 4 g / L and the pH value to 22.2. After 4 hours of reaction, lower the pH value to 11.0. Simultaneously, rotate the inner sleeve 1 of the feed, alkali, and ammonia inlet pipes. Figure 2 As shown, rotate the inner sleeve 1 so that the first mark (green) on the top of the inner sleeve 1 is aligned with the stirring shaft. Then rotate the outer sleeve 2 so that the second mark (green) on the top of the outer sleeve 2 is aligned with the first mark (green) on the top of the inner sleeve 1. The feed holes on the inner and outer sleeves 2 are overlapped to achieve bottom feeding.

[0111] 5. After the reaction is completed, the material is aged in the synthesis kettle for 4 hours and then washed with a centrifuge. The washing process involves alkali washing followed by water washing, with a dilute alkali concentration of 40 g / L.

[0112] 6. After washing, dry the material in an oven at 220℃ for 22 hours. The dried material will have good dispersibility and a narrow particle size distribution.

[0113] Example 2

[0114] 1. Prepare a mixed solution of soluble nickel sulfate, cobalt sulfate, and manganese sulfate according to stoichiometric ratio, wherein the total molar concentration of metal ions in the mixed solution is 2.0 mol / L, and the molar ratio of nickel, cobalt, and manganese is 8:1:1; prepare a precipitant solution with a concentration of 5.0 mol / L using sodium hydroxide solution; and prepare a complexing agent solution with a concentration of 7.5 mol / L using ammonia solution.

[0115] 2. Control the stirring speed at 30Hz and the temperature at 50℃, and introduce nitrogen gas into the synthesis reactor, controlling the nitrogen flow rate at 6m³ / min. 3 / h;

[0116] 3. Rotate the inner sleeve 1 of the feed, alkali, and ammonia inlet pipes, as follows: Figure 2 As shown, rotate the inner sleeve 1 so that the first mark (green) on the top of the inner sleeve 1 is aligned with the stirring shaft. Then rotate the outer sleeve 2 so that the second mark (green) on the top of the outer sleeve 2 is aligned with the first mark (green) on the top of the inner sleeve 1. The feed holes on the inner and outer sleeves 2 are overlapped to achieve bottom feeding.

[0117] 4. Control the ammonia value of the synthesis reaction to 4 g / L and the pH value to 11.4. After continuous reaction for 22 hours, simultaneously rotate the inner sleeve 1 of the feed, alkali, and ammonia inlet pipes. Figure 4 As shown, the inner sleeve 1 is rotated so that the first mark (blue) on the top of the inner sleeve 1 is aligned with the stirring shaft. Then the outer sleeve 2 is rotated so that the second mark (blue) on the top of the outer sleeve 2 is aligned with the first mark (blue) on the top of the inner sleeve 1. The feed holes on the inner and outer sleeves 2 are overlapped to achieve uniform feeding.

[0118] 5. The overflowing material is washed using a centrifuge, first with alkali and then with water. The concentration of the alkali used for alkali washing is 50g / L.

[0119] 6. After washing, dry the material in an oven at 140℃ for 14 hours. The resulting material has good dispersibility and a narrow particle size distribution.

[0120] Example 3

[0121] 1. Prepare a mixed solution of soluble nickel sulfate, cobalt sulfate, and manganese sulfate according to stoichiometric ratio, wherein the total molar concentration of metal ions in the mixed solution is 2.2 mol / L, and the molar ratio of nickel, cobalt, and manganese is 8:1:1; prepare a 10 mol / L precipitant solution using sodium hydroxide solution; and prepare a 10 mol / L ammonia solution as a complexing agent solution.

[0122] 2. Control the stirring speed at 32Hz and the temperature at 65℃, and introduce nitrogen gas into the synthesis reactor, controlling the nitrogen flow rate at 6m³ / min. 3 / h;

[0123] 3. Rotate the inner sleeve 1 of the feed, alkali, and ammonia inlet pipes, as follows: Figure 4 The inner sleeve 1 is rotated so that the first mark (blue) on the top of the inner sleeve 1 is aligned with the stirring shaft. Then the outer sleeve 2 is rotated so that the second mark (blue) on the top of the outer sleeve 2 is aligned with the first mark (blue) on the top of the inner sleeve 1. The feed holes on the inner and outer sleeves 2 are overlapped to achieve uniform feeding.

[0124] 4. Control the ammonia value of the synthesis reaction to 6.5 g / L and the pH value to 22.5. After 3 hours of reaction, lower the pH value to 10.9. Simultaneously, rotate the inner sleeve 1 of the feed, alkali, and ammonia inlet pipes. Figure 5 As shown, align the first mark (black) on the top of the inner sleeve 1 with the stirring shaft, and then rotate the outer sleeve 2 so that the second mark (black) on the top of the outer sleeve 2 and the first mark (black) on the top of the inner sleeve 1 are aligned, so that the feed holes on the inner and outer sleeves 2 overlap, achieving non-uniform feeding.

[0125] 5. After the reaction is completed, the material is aged in the synthesis kettle for 4 hours and then washed with a centrifuge. The washing process involves alkali washing followed by water washing, with a dilute alkali concentration of 40 g / L.

[0126] 6. After washing, dry the material in an oven at 220℃ for 22 hours. The dried material will have good dispersibility and a narrow particle size distribution.

[0127] Comparative Example 1

[0128] 1. Prepare a mixed solution of soluble nickel sulfate, cobalt sulfate, and manganese sulfate according to stoichiometric ratio, wherein the total molar concentration of metal ions in the mixed solution is 1.8 mol / L, and the molar ratio of nickel, cobalt, and manganese is 8:1:1; prepare a precipitant solution with a concentration of 5.0 mol / L using sodium hydroxide solution; and prepare a complexing agent solution with a concentration of 10 mol / L using ammonia solution.

[0129] 2. Control the stirring speed at 30Hz and the temperature at 60℃, and introduce nitrogen gas into the synthesis reactor, controlling the nitrogen flow rate at 8m³ / min. 3 / h;

[0130] 3. Rotate the inner sleeve 1 of the feed, alkali, and ammonia inlet pipes, as follows: Figure 2 As shown, rotate the inner sleeve 1 so that the first mark (green) on the top of the inner sleeve 1 is aligned with the stirring shaft. Then rotate the outer sleeve 2 so that the second mark (green) on the top of the outer sleeve 2 is aligned with the first mark (green) on the top of the inner sleeve 1. The feed holes on the inner and outer sleeves 2 are overlapped to achieve bottom feeding.

[0131] 4. Control the ammonia value of the synthesis reaction to 4 g / L and the pH value to 22.2. After 4 hours of reaction, lower the pH value to 11.0 until the reaction is completed.

[0132] 5. After the reaction is completed, the material is aged in the synthesis kettle for 4 hours, and then washed with a centrifuge. The washing process involves alkali washing followed by water washing, with a dilute alkali concentration of 40 g / L.

[0133] 6. After washing, dry the product in an oven at 220℃ for 22 hours. The resulting precursor material is then obtained.

[0134] Comparative Example 2

[0135] 1. Prepare a mixed solution of soluble nickel sulfate, cobalt sulfate, and manganese sulfate according to stoichiometric ratio, wherein the total molar concentration of metal ions in the mixed solution is 2.0 mol / L, and the molar ratio of nickel, cobalt, and manganese is 8:1:1; prepare a precipitant solution with a concentration of 5.0 mol / L using sodium hydroxide solution; and prepare a complexing agent solution with a concentration of 7.5 mol / L using ammonia solution.

[0136] 2. Control the stirring speed at 30Hz and the temperature at 50℃, and introduce nitrogen gas into the synthesis reactor, controlling the nitrogen flow rate at 6m³ / min. 3 / h;

[0137] 3. Rotate the inner sleeve 1 of the feed, alkali, and ammonia inlet pipes, as follows: Figure 2 As shown, rotate the inner sleeve 1 so that the first mark (green) on the top of the inner sleeve 1 is aligned with the stirring shaft. Then rotate the outer sleeve 2 so that the second mark (green) on the top of the outer sleeve 2 is aligned with the first mark (green) on the top of the inner sleeve 1. The feed holes on the inner and outer sleeves 2 are overlapped to achieve bottom feeding.

[0138] 4. Control the ammonia concentration of the synthesis reaction to 4 g / L and the pH to 11.4. Continuous reaction;

[0139] 5. The overflowing material is washed using a centrifuge, first with alkali and then with water. The concentration of the alkali used for alkali washing is 50g / L.

[0140] 6. After washing, dry the material in an oven at 140℃ for 14 hours. The resulting material has good dispersibility and a narrow particle size distribution.

[0141] The main indicators of the precursors prepared in the examples and comparative examples are shown in Table 1 below.

[0142]

[0143] Compared to Comparative Example 1, Examples 1 and 3 show that Example 1 used a non-uniform feed that facilitated rapid material dispersion during the high pH start-up phase, while Example 3 used a uniform feed that also facilitated rapid material dispersion. Therefore, the uniformity of the material in the early stages of the reaction was better than that of the bottom feed in Comparative Example 1. In the low pH growth phase, Example 3 also differed from Comparative Example 1. The use of a non-uniform feed reduced the decrease in BET caused by excessive particle growth to some extent. Due to the poor dispersibility and relative overgrowth issues in the Comparative Example, the final product's TD, BET, and particle size distribution were all worse than those of Examples 1 and 3.

[0144] Compared to Comparative Example 2, Example 2 employed uniform feeding. In this case, the reactants entered the reaction system from various parts of the synthesis vessel, and the stirring paddle effectively dispersed the reactants, promoting uniform dispersion and preventing particle agglomeration, thus improving particle dispersibility. Simultaneously, with uniform feeding, some reactants were closer to the overflow port, which facilitated the formation of smaller particles, thereby improving particle size distribution. Ultimately, the TD, BET, and particle size distribution of the final product from Example 2 were superior to those of Comparative Example 2.

[0145] This application also provides a synthesis reactor, including a vertical feed pipe, wherein the vertical feed pipe is the vertical feed pipe described in any of the above embodiments.

[0146] Since the vertical feed pipe has the above-mentioned technical effects, the synthesis reactor with the vertical feed pipe also has the same technical effects, which will not be elaborated here.

[0147] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed, and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. The scope of this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described application concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A vertical feed tube characterized in that, The inner sleeve (1) and the outer sleeve (2) are connected by sleeving, The inner sleeve (1) is provided with a first feeding hole group (11), and N first elementary lines of the inner sleeve (1) are provided with the first feeding hole group (11), and at most M first feeding hole groups (11) are provided on each first elementary line, and the included angle between adjacent first elementary lines provided with the first feeding hole group (11) is α. The outer sleeve (2) is provided with a second feeding hole group (22), and Q second elementary lines of the outer sleeve (2) are provided with the second feeding hole group (22), and at most P second feeding hole groups (22) are provided on each second elementary line, and the included angle between adjacent second elementary lines provided with the second feeding hole group (22) is β, β≠α / n, α>0°, β>0°, The inner sleeve (1) and the outer sleeve (2) can rotate relative to each other, so that the second feeding hole group (22) can communicate with the first feeding hole group (11) to adjust the feeding height and feeding direction of the vertical feeding pipe. Wherein, M≥1, N≥1, P≥1, Q≥1, and M, N, P, Q and n are positive integers, When N=1, Q≠1, the M first feeding hole groups (11) are arranged along the axis of the inner sleeve from the upper end of the inner sleeve (1) to the lower end of the inner sleeve (1) in sequence; when Q=1, N≠1, the P second feeding hole groups (22) are arranged along the axis of the outer sleeve from the upper end of the outer sleeve (2) to the lower end of the outer sleeve (2) in sequence; The inner sleeve (1) is a titanium pipe, a stainless steel pipe or an engineering plastic pipe; The outer sleeve (2) is a titanium pipe, a stainless steel pipe or an engineering plastic pipe.

2. The vertical feed tube of claim 1, wherein, The top of the inner sleeve (1) is provided with a first mark corresponding to the position of the first elementary line provided with the first feeding hole group (11); The top of the outer sleeve (2) is provided with a second mark corresponding to the position of the second elementary line provided with the second feeding hole group (22).

3. The vertical feed tube of claim 1, wherein, The gap between the inner sleeve (1) and the outer sleeve (2) is 0.01-1.0mm.

4. The vertical feed tube of claim 1, wherein, The first feeding hole group (11) includes at least one first feeding hole, the distance between adjacent first feeding hole groups (11) is greater than the distance between adjacent two first feeding holes, and the number of first feeding holes of the first feeding hole group (11) on the same first elementary line is the same or different.

5. The vertical feed tube of claim 4, wherein, The second feeding hole group (22) includes at least one second feeding hole, the distance between adjacent second feeding hole groups (22) is greater than the distance between adjacent two second feeding holes, and the number of second feeding holes of the second feeding hole group (22) on the same second elementary line is the same or different.

6. The vertical feed tube of claim 5, wherein, The distance between adjacent first feeding holes is ≤1cm; The distance between adjacent second feeding holes is ≤1cm.

7. The vertical feed tube of claim 6, wherein, The aperture of the second feeding hole is ≥ the aperture of the first feeding hole.

8. A synthesis kettle characterized by, The vertical feeding pipe comprises the vertical feeding pipe according to any one of claims 1-7.

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