Ventilation device and reaction system

Abstract

The utility model relates to a ventilation device and a reaction system, and belongs to the technical field of chemical equipment. The ventilation device comprises an inner pipe which comprises an air inlet section and an air outlet section, the air outlet section is communicated with the air inlet section, and a plurality of first through holes used for air outlet are formed in the side wall of the air outlet section; the outer pipe is arranged outside the air outlet section of the inner pipe in a sleeving mode, a cavity is defined by the outer pipe and the air outlet section of the inner pipe, a plurality of second through holes are formed in the outer pipe, and the interior of the inner pipe communicates with the exterior of the outer pipe through the first through holes, the cavity and the second through holes. When the ventilation device is used for conveying gas, the gas is scattered by the first through holes when entering the cavity from the interior of the gas outlet section, and is further scattered by the second through holes when being discharged out of the outer pipe from the interior of the cavity, so that the dispersion uniformity of the gas can be improved; and when being used in battery raw material production, the gas can be efficiently and uniformly mixed with other reactants such as reaction liquid, so that the reaction effect can be improved.

Description

Technical Field

[0001] This application relates to the technical field of chemical equipment, and particularly relates to a ventilation device and a reaction system. Background Art

[0002] As a common reaction raw material in the chemical reaction process, gas is generally transported through various types of pipelines and interfaces. In some cases, in order to improve the reaction effect of the gas participating in the reaction, for example, in the gas-liquid mixing reaction, the outlet of the pipeline is often directly immersed below the liquid level of the reaction liquid, so that the gas can directly enter the reaction liquid to facilitate full reaction. However, the above gas inlet method will result in poor gas dispersion and uneven mixing of the gas and the reaction liquid, so that the gas reacts more fully with the reaction liquid near the outlet of the pipeline, while the reaction effect of the reaction liquid far from the pipeline outlet with the gas is not good, affecting the quality consistency of the reaction products. Utility Model Content

[0003] This application provides a ventilation device and a reaction system to solve the technical problems of poor gas dispersion and uneven mixing of gas and reaction liquid in the prior art for gas transportation.

[0004] According to an embodiment of the present application, a ventilation device is provided, including: an inner tube, including an air inlet section and an air outlet section, the air outlet section is communicated with the air inlet section, and a plurality of first through holes for air outlet are arranged on the side wall of the air outlet section; and an outer tube, sleeved outside the air outlet section of the inner tube and forming a cavity between the outer tube and the air outlet section of the inner tube, a plurality of second through holes are arranged on the outer tube, and the inside of the inner tube is communicated with the outside of the outer tube through the first through holes, the cavity and the second through holes.

[0005] In some alternative embodiments, the outer tube is detachably connected to the air inlet section or the air outlet section.

[0006] In some alternative embodiments, the aperture of the second through hole is smaller than the aperture of the first through hole.

[0007] In some alternative embodiments, the aperture of the first through hole is 2-4 mm.

[0008] In some alternative embodiments, the aperture of the second through hole is 0.1-0.2 μm.

[0009] In some alternative embodiments, the wall thickness of the outer tube is 2-3 mm.

[0010] In some alternative embodiments, the inner diameter of the outer tube is 1.5-2.0 times the outer diameter of the inner tube.

[0011] In some alternative embodiments, the outer tube is a tubular structure formed by an asymmetric metal film;

[0012] Among them, the asymmetric metal film has a certain hardness and can maintain the shape of the outer tube. The asymmetric metal film includes a titanium asymmetric metal film, etc., and can be directly purchased on the market.

[0013] In some alternative embodiments, a cavity is formed between the outer sleeve disposed outside the air outlet section and the air outlet section, and the cavity is a hollow cavity.

[0014] In some alternative embodiments, one end of the air inlet section away from the air outlet section is arranged in an open structure for air inlet, and one end of the air outlet section away from the air inlet section is arranged as a closed structure.

[0015] In some alternative embodiments, the length of the outer tube is less than the length of the inner tube.

[0016] In some alternative embodiments, the outer tube protrudes in the length direction from one end of the air outlet section away from the air inlet section.

[0017] In some alternative embodiments, the ventilation device is used in the production of battery raw materials.

[0018] According to another embodiment of the present application, a reaction system is provided, including: a reaction device having a reaction chamber; and the ventilation device according to any one of the above embodiments, wherein the air outlet section and the outer tube are arranged in the reaction chamber.

[0019] In some alternative embodiments, the reaction device further includes a stirring shaft and a plurality of blades. The stirring shaft extends into the reaction chamber, and the plurality of blades are connected to the stirring shaft and arranged along the axial direction of the stirring shaft. The highest position of the outer tube in the axial direction of the stirring shaft is not higher than the maximum arrangement height of the blades in the axial direction of the stirring shaft, and the lowest position of the outer tube in the axial direction of the stirring shaft is not lower than the minimum arrangement height of the blades in the axial direction of the stirring shaft.

[0020] In some alternative embodiments, the reaction system further includes a gas supply assembly and a gas supply pipeline. The gas supply assembly is connected to the air inlet section through the gas supply pipeline for supplying gas to the air inlet section. Among them, the air inlet section is detachably connected to the gas supply pipeline; and / or the outer diameter of the air inlet section is equal to the inner diameter of the gas supply pipeline.

[0021] In some alternative embodiments, the gas supply assembly includes a first raw material tank, a first raw material pipeline, a second raw material tank, a second raw material pipeline, a mixing storage tank, a mixing pipeline and an intermediate storage tank. The first raw material tank and the second raw material tank are respectively communicated with the inlet of the mixing storage tank through the first raw material pipeline and the second raw material pipeline. The outlet of the mixing storage tank is communicated with the inlet of the intermediate storage tank through the mixing pipeline. The outlet of the intermediate storage tank is communicated with the air inlet section through the gas supply pipeline.

[0022] In some alternative embodiments, the reaction system further includes: a first pressure gauge, a second pressure gauge, a third pressure gauge and a fourth pressure gauge. The first pressure gauge is arranged on the first raw material tank, the second pressure gauge is arranged on the second raw material tank, the third pressure gauge is arranged on the mixing storage tank, and the fourth pressure gauge is arranged on the intermediate storage tank; and / or a first flowmeter and a second flowmeter. The first flowmeter is arranged on the first raw material pipeline, and the second flowmeter is arranged on the second raw material pipeline; and / or a first oxygen analyzer and a second oxygen analyzer. The first oxygen analyzer is arranged on the intermediate storage tank, and the second oxygen analyzer is arranged on the reaction device; and / or a first intermediate valve, a second manual valve, a third check valve, a fourth pneumatic valve, a first raw material valve and a second raw material valve. The first intermediate valve is arranged on the mixing pipeline, and the second manual valve, the third check valve and the fourth pneumatic valve are arranged on the gas supply pipeline in sequence along the gas transmission direction. The first raw material valve is arranged on the first raw material pipeline, and the second raw material valve is arranged on the second raw material pipeline.

[0023] In some alternative embodiments, the reaction system further includes: a control unit configured to control the gas flow rates in the first raw material pipeline, the second raw material pipeline, the mixing pipeline and the gas supply pipeline; wherein the control unit is electrically connected to the first pressure gauge, the second pressure gauge, the third pressure gauge and the fourth pressure gauge; and / or the control unit is electrically connected to the first flowmeter and the second flowmeter; and / or the control unit is electrically connected to the first oxygen analyzer and the second oxygen analyzer; and / or the control unit is electrically connected to the first raw material valve, the second raw material valve, the first intermediate valve, the third check valve and the fourth pneumatic valve.

[0024] In summary, the ventilation device and the reaction system provided by the present application have at least the following beneficial effects:

[0025] The reaction system provided by an embodiment of the present application includes a ventilation device. The ventilation device includes an inner tube and an outer tube. The inner tube includes an air inlet section and an air outlet section. A cavity is formed between the air outlet section and the outer tube. The cavity is communicated with the inside of the inner tube and the outside of the outer tube through a first through hole and a second through hole respectively. When using the ventilation device to transport gas, the gas is first transported to the air outlet section through the air inlet section, and is transported from the first through hole on the air outlet section into the cavity between the outer tube and the air outlet section, and then discharged out of the cavity through the second through hole on the outer tube. Thus, when the gas enters the cavity from the inside of the air outlet section, it will be dispersed by a plurality of first through holes, and when it is discharged from the cavity to the outside of the outer tube, it will be further dispersed by a plurality of second through holes, thereby improving the dispersion uniformity of the gas, which is beneficial to the efficient mixing of the gas with other reactants such as reaction liquid during the production of battery raw materials, and further beneficial to improving the reaction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0027] Figure 1 It is a schematic cross-sectional structure diagram of the ventilation device provided by an embodiment of the present application;

[0028] Figure 2 is Figure 1 an enlarged structural schematic diagram of part A in

[0029] Figure 3 It is a schematic overall structure diagram of the reaction system provided by an embodiment of the present application.

[0030] The reference numerals are as follows:

[0031] 10, reaction system;

[0032] 100, ventilation device;

[0033] 110, inner tube; 111, air inlet section; 112, air outlet section; 113, first through hole; 114, open structure; 115, closed structure;

[0034] 120, outer tube; 121, second through hole;

[0035] 130, cavity;

[0036] 200, reaction device; 210, reaction chamber; 220, stirring shaft; 230, paddle;

[0037] 300. Gas supply assembly; 310. First raw material tank; 320. First raw material pipeline; 330. Second raw material tank; 340. Second raw material pipeline; 350. Mixing storage tank; 360. Mixing pipeline; 370. Intermediate storage tank;

[0038] 400. Gas supply pipeline;

[0039] 510. First pressure gauge; 520. Second pressure gauge; 530. Third pressure gauge; 540. Fourth pressure gauge;

[0040] 610. First flowmeter; 620. Second flowmeter;

[0041] 710. First oxygen detector; 720. Second oxygen detector;

[0042] 810. First intermediate valve; 820. Second manual valve; 830. Third check valve; 840. Fourth pneumatic valve; 850. First raw material valve; 860. Second raw material valve. Detailed implementation manners

[0043] In the description of the present application, it should be understood that when terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are used to indicate the orientation or positional relationship, without special instructions, it is understood as the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it should not be construed as a limitation to the present application.

[0044] In addition, features limited by "first" and "second" are only for descriptive purposes and should not be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Features limited by "first" and "second" may explicitly or implicitly include at least one of the limited features. When descriptions such as "multiple" and "several" appear, the general meaning is at least including two, such as two, three, etc., unless otherwise clearly and specifically limited.

[0045] In this application, unless otherwise clearly specified or limited, terms such as "installed", "connected", "coupled", "fixed", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, a direct connection, or an indirect connection through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0046] In the description of this specification, terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0047] The ventilation device 100 provided by an embodiment of this application is used in the production of battery raw materials. During the production process, the ventilation device 100 can be used to introduce reaction gases into the reaction system to promote the generation of battery raw materials. Exemplarily, in some embodiments, the ventilation device 100 can be used to introduce reaction gases containing oxygen below the liquid level of the reaction liquid during the preparation of the precursor of the positive electrode material of a lithium-ion battery, so that the oxygen contained in the reaction gas can be fully mixed with the reaction liquid and then undergo an oxidation reaction, which is beneficial to preparing a precursor of the positive electrode material of a lithium-ion battery with stable structure and good electrochemical performance.

[0048] Please refer to Figures 1 to 2 , the ventilation device 100 provided by an embodiment of this application includes an inner tube 110 and an outer tube 120.

[0049] The inner tube 110 includes an air inlet section 111 and an air outlet section 112 connected in sequence. Both the air inlet section 111 and the air outlet section 112 are in a cylindrical tubular structure. The air inlet section 111 is used for air intake. For example, the air inlet section 111 can be externally connected to a gas supply pipeline 400; the air outlet section 112 is in communication with the air inlet section 111, and a plurality of first through holes 113 for air outlet are provided on the side wall of the air outlet section 112. For example, the first through holes 113 can be circular holes penetrating the side wall of the air outlet section 112 of the inner tube 110.

[0050] The inner diameter of the outer tube 120 is larger than the outer diameter of the inner tube 110. The outer tube 120 is sleeved outside the gas outlet section 112 of the inner tube 110, and a cavity 130 is formed between the outer tube 120 and the gas outlet section 112. For example, the cavity 130 can be a hollow cavity. A plurality of second through holes 121 are provided on the outer tube 120. For example, the second through holes 121 can be circular holes penetrating the side wall of the outer tube 120. The second through holes 121 communicate with the first through holes 113 through the cavity 130, and the inside of the inner tube 110 and the outside of the outer tube 120 communicate through the first through holes 113, the cavity 130 and the second through holes 121.

[0051] Through the above structural design, when the reaction gas is transported by the ventilation device 100, the reaction gas is first transported to the gas outlet section 112 through the gas inlet section 111, and is transported from the first through holes 113 on the gas outlet section 112 into the cavity 130 between the outer tube 120 and the gas outlet section 112, and then discharged from the second through holes 121 on the outer tube 120 outside the cavity 130. Thus, when the reaction gas enters the cavity 130 from the inside of the gas outlet section 112, it will be divided into bubbles with larger particle sizes by the plurality of first through holes 113, and when it is discharged from the cavity 130 outside the outer tube 120, it will be further divided into bubbles with smaller particle sizes by the plurality of second through holes 121, so that the dispersion uniformity of the reaction gas in the reaction liquid can be improved, which is beneficial to the efficient mixing of the reaction gas and other reactants such as the reaction liquid, and further beneficial to improving the reaction effect in the production process of battery raw materials.

[0052] In particular, when the ventilation device 100 is used to introduce reaction gas below the liquid surface of the reaction liquid, the outer tube 120 can be immersed below the liquid surface so that the second through hole 121 is immersed in the reaction liquid. The reaction chamber 130 is a mixing chamber of gas and liquid. At this time, part of the reaction liquid will pass through the second through hole 121 to enter the chamber 130 and pass through the first through hole 113 to enter the inside of the inner tube 110. Then, the reaction gas is introduced. The reaction gas passes through the intake section 111 and the outlet section 112 in sequence. Due to the pressure of the reaction gas, the reaction liquid inside the inner tube 110 can be extruded to pass through the first through hole 113 to enter the chamber 130. At the same time, the reaction gas is divided into a large number of bubbles when passing through several first through holes 113. These bubbles enter the chamber 130 and are fully mixed with the reaction liquid for reaction. Moreover, when the reaction gas is continuously introduced, the reaction gas in the chamber 130 will pass through several second through holes 121 and be divided into more bubbles, so that the reaction gas is more evenly mixed with the reaction liquid after passing through the second through holes 121, realizing the uniform dispersion and uniform reaction of the reaction gas in the reaction liquid. In addition, when the reaction gas is continuously introduced, due to the pressure of the reaction gas, the reaction gas can play a back-blowing role when passing through the first through hole 113 and the second through hole 121, avoiding the blockage of the first through hole 113 and the second through hole 121 by solid substances that may be contained in the reaction liquid, ensuring the smooth ventilation of the first through hole 113 and the second through hole 121, and facilitating the normal progress of the battery raw material production process.

[0053] As a further preferred embodiment, on the basis of the above solution, in the specific embodiments of the present application, one or more of the following additions or combinations may also be included.

[0054] In some alternative embodiments, the outer tube 120 is detachably connected to the intake section 111 or the outlet section 112. Exemplarily, referring to Figure 1 , the top end of the outer tube 120 can be threadedly connected to the outer wall of the intake section 111 of the inner tube 110, so as to facilitate the disassembly, cleaning, repair and replacement of the outer tube 120 and the inner tube 110.

[0055] In some alternative embodiments, the aperture of the second through hole 121 is smaller than the aperture of the first through hole 113. Thus, when the reaction gas passes through the first through hole 113, it is first divided into bubbles with a larger particle size. These bubbles are fully mixed with the reaction liquid in the chamber 130. After the mixed bubbles pass through the second through hole 121, they are further divided into bubbles with a smaller particle size, which is beneficial to improving the dispersion uniformity of the reaction gas in the reaction liquid.

[0056] In some optional embodiments, the aperture of the first through hole 113 is 2-4 mm. For example, the aperture of the first through hole 113 can be 2 mm, 2.2 mm, 2.4 mm, 2.6 mm, 2.8 mm, 3 mm, 3.2 mm, 3.4 mm, 3.6 mm, 3.8 mm, 4 mm or any value between 2-4 mm. In some optional embodiments, the aperture of the second through hole 121 is 0.1-0.2 μm. For example, the aperture of the second through hole 121 can be 0.1 μm, 0.11 μm, 0.12 μm, 0.13 μm, 0.14 μm, 0.15 μm, 0.16 μm, 0.17 μm, 0.18 μm, 0.19 μm, 0.2 μm or any value between 0.1-0.2 μm. By controlling the apertures of the first through hole 113 and the second through hole 121 to be within the above-mentioned suitable ranges, the reaction gas is first divided into millimeter-level bubbles of suitable size when passing through the first through hole 113, and then divided into micrometer-level bubbles of suitable size when passing through the second through hole 121, which is conducive to further improving the dispersion uniformity of the reaction gas. In addition, since the aperture of the second through hole 121 is small enough, the solid particles outside the outer tube 120 can be prevented from passing through the second through hole 121 into the cavity 130 as much as possible, thereby preventing the reaction material from remaining in the cavity 130.

[0057] In some optional embodiments, when the outer tube 120 is a tubular structure with a certain hardness formed by an asymmetric metal film, the second through hole 121 is a hole on the asymmetric metal film, and the thickness of the tube wall of the outer tube 120 is 2-3 mm. It should be understood that if the thickness of the tube wall of the outer tube 120 is too small, the structural strength of the outer tube 120 is insufficient, and it is easy to be damaged after being immersed in the reaction liquid; if the thickness of the tube wall of the outer tube 120 is too large, affected by the material and process of the outer tube 120, the second through hole 121 formed on the outer tube 120 may be a tortuous hole, resulting in a large resistance when the reaction gas passes through the second through hole 121, which is not conducive to the introduction of the reaction gas. In this embodiment, the thickness of the tube wall of the outer tube 120 is controlled within the above-mentioned appropriate range, which can not only ensure the structural strength of the outer tube 120, but also facilitate the smoother introduction of the reaction gas. Illustratively, the thickness of the tube wall of the outer tube 120 may be 2 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm, 2.5 mm, 2.6 mm, 2.7 mm, 2.8 mm, 2.9 mm, 3 mm, or any value between 2-3 mm.

[0058] In some alternative embodiments, the inner diameter of the outer tube 120 is 1.5 - 2.0 times the outer diameter of the inner tube 110. At this time, it is beneficial to form a cavity 130 with a suitable volume, which is conducive to the preliminary mixing of the reaction gas and the reaction liquid in the cavity 130. At the same time, it is beneficial to ensure the structural strength after the connection of the outer tube 120 and the inner tube 110 and avoid damage. Exemplarily, the inner diameter of the outer tube 120 can be 1.5 times, 1.6 times, 1.7 times, 1.8 times, 1.9 times, 2.0 times the outer diameter of the inner tube 110, or any value between 1.5 - 2.0 times.

[0059] In some alternative embodiments, the outer tube 120 is a tubular structure with a certain hardness formed by an asymmetric metal film. Exemplarily, referring to Figures 1 to 2 , the outer tube 120 is a tubular structure with a certain hardness formed by a titanium asymmetric metal film, and its side and bottom are both composed of the titanium asymmetric metal film, and the second through holes 121 are evenly distributed on the film surface. In this embodiment, the asymmetric metal film is selected to make the outer tube 120 have sufficient strength, which is not only beneficial to reducing the difficulty of forming the second through holes 121 with extremely small apertures on the outer tube 120, but also beneficial to ensuring the connection strength between the outer tube 120 and the inner tube 110.

[0060] In some alternative embodiments, one end of the intake section 111 away from the outlet section 112 is provided with an open structure 114 for intake, and one end of the outlet section 112 away from the intake section 111 is provided with a closed structure 115. Exemplarily, referring to Figure 1 , the inner tube 110 includes an intake section 111 and an outlet section 112 from top to bottom. The open structure 114 at the top of the intake section 111 is used to connect to the gas supply pipeline 400. The bottom of the intake section 111 is communicated with the outlet section 112. The bottom of the outlet section 112 is a closed structure 115, and the side wall of the outlet section 112 is provided with a first through hole 113. Thus, setting the bottom of the outlet section 112 as a closed structure 115 can block the reaction gas entering the outlet section 112 from top to bottom, so that the reaction gas can be discharged through the first through holes 113 on the side wall of the outlet section 112, which is beneficial to improving the dispersion uniformity of the reaction gas.

[0061] In some alternative embodiments, the length of the outer tube 120 is less than the length of the inner tube 110. In this embodiment, the inner tube 110 has a longer length to facilitate the connection of the inner tube 110 with the gas supply pipeline 400. At the same time, the outer tube 120 has a shorter length, which is convenient to immerse the entire outer tube 120 in the reaction liquid to facilitate the introduction of the reaction gas into the reaction liquid.

[0062] In some alternative embodiments, the outer tube 120 protrudes from one end of the outlet section 112 away from the intake section 111 in the length direction. Referring to Figure 1, the length direction of the outer tube 120 refers to the vertical direction in the figure, and the end of the air outlet section 112 away from the air inlet section 111 refers to the bottom end of the air outlet section 112. Specifically, the bottom end of the outer tube 120 is lower than the bottom end of the air outlet section 112 of the inner tube 110, so that the outer tube 120 can wrap the bottom end of the air outlet section 112, which is beneficial to form a cavity 130 for the preliminary mixing of the reaction liquid and the reaction gas between the outer tube 120 and the inner tube 110.

[0063] Referring to Figure 3 , according to another embodiment of the present application, a reaction system 10 is provided, including: a reaction device 200 having a reaction chamber 210; and the ventilation device 100 of any of the above embodiments, the air inlet section 111 is connected to the reaction device 200, and the air outlet section 112 and the outer tube 120 are arranged in the reaction chamber 210. Based on the structural design of the ventilation device 100 of any of the above embodiments, the reaction system 10 of the embodiments of the present application can make the reaction gas be evenly dispersed in the reaction liquid, which is beneficial to improving the reaction effect.

[0064] Exemplarily, in some embodiments, the reaction device 200 is a reaction kettle having a reaction chamber 210, and a reaction liquid is contained in the reaction chamber 210. The ventilation device 100 is used to introduce a reaction gas containing oxygen with an appropriate concentration into the reaction chamber 210. Specifically, the outer tube 120 can be extended below the liquid level of the reaction liquid to introduce the reaction gas, so that the oxygen contained in the reaction gas reacts with the reaction liquid, so that the reaction system 10 can be used to prepare a precursor of a lithium-ion battery cathode material.

[0065] In some alternative embodiments, the reaction device 200 includes a stirring shaft 220 and a plurality of paddle blades 230. The stirring shaft 220 extends into the reaction chamber 210, and the plurality of paddle blades 230 are connected to the stirring shaft 220 and arranged along the axial direction of the stirring shaft 220; the highest point of the outer tube 120 in the axial direction of the stirring shaft 220 is not higher than the maximum arrangement height of the paddle blades 230 in the axial direction of the stirring shaft 220, and the lowest point of the outer tube 120 in the axial direction of the stirring shaft 220 is not lower than the minimum arrangement height of the paddle blades 230 in the axial direction of the stirring shaft 220. Specifically, the maximum arrangement height of the paddle blades 230 in the axial direction of the stirring shaft 220 refers to the height of the uppermost paddle blade 230 arranged on the stirring shaft 220, and the minimum arrangement height of the paddle blades 230 in the axial direction of the stirring shaft 220 refers to the height of the lowermost paddle blade 230 arranged on the stirring shaft 220. Thus, by arranging the outer tube 120 between the uppermost paddle blade 230 and the lowermost paddle blade 230, when the stirring shaft 220 drives the paddle blades 230 to rotate, the shear force of the paddle blades 230 on the reaction liquid fluid is stronger, which is not only beneficial to fully disperse the reaction gas discharged from the second through hole 121, but also beneficial to stirring and flushing the reaction slurry on the surface of the outer tube 120 to avoid blocking the second through hole 121.

[0066] Exemplarily, in some embodiments, referring to Figure 3 , a stirring shaft 220 extending in the vertical direction is disposed inside the reaction device 200, and the stirring shaft 220 can rotate self - sufficiently driven by a motor. A plurality of blades 230 are connected to the outer periphery of the stirring shaft 220, and the blades 230 can rotate with the stirring shaft 220 to stir the reaction liquid in the reaction chamber 210, thereby promoting the reaction. The top end of the outer tube 120 in the vertical direction is flush with the height of the uppermost blade 230 on the stirring shaft 220, and the bottom end of the outer tube 120 in the vertical direction is flush with the height of the lowermost blade 230 on the stirring shaft 220, that is, the length of the outer tube 120 is equal to the distance between the uppermost blade 230 and the lowermost blade 230 (see the distance "a" in Figure 3 ), and the second through - holes 121 formed in the outer tube 120 are all located between the uppermost blade 230 and the lowermost blade 230. At this time, the shearing force of the rotating blades 230 on the reaction liquid is relatively strong, and the tiny bubbles discharged from the second through - holes 121 are fully dispersed instantly when entering the reaction chamber 210 and fill the entire reaction chamber 210, realizing the uniform dispersion of the reaction gas in the reaction slurry and the uniform reaction of the materials. At the same time, the stirring shaft 220 and the blades 230 operate at a high speed to stir the reaction slurry, which can effectively wash the slurry on the surface of the outer tube 120, ensure that the surface of the outer tube 120 is not easily contaminated, and ensure the smooth ventilation of the second through - holes 121.

[0067] In some alternative embodiments, the reaction system 10 further includes a gas supply assembly 300 and a gas supply pipeline 400. The gas supply assembly 300 is connected to the intake section 111 of the inner tube 110 through the gas supply pipeline 400 for supplying gas to the intake section 111 of the inner tube 110; wherein, the intake section 111 is detachably connected to the gas supply pipeline 400. Exemplarily, the intake section 111 of the inner tube 110 can be connected to the gas supply pipeline 400 through a flange and bolts, which is beneficial for disassembly, maintenance and replacement.

[0068] In some alternative embodiments, the outer diameter of the intake section 111 of the inner tube 110 is equal to the inner diameter of the gas supply pipeline 400, so as to facilitate inserting the intake section 111 of the inner tube 110 into the gas supply pipeline 400, thereby achieving better connection sealing performance and avoiding air leakage.

[0069] In some alternative embodiments, the gas supply assembly 300 includes a first raw material tank 310, a first raw material pipeline 320, a second raw material tank 330, a second raw material pipeline 340, a mixing storage tank 350, a mixing pipeline 360, and an intermediate storage tank 370. The first raw material tank 310 and the second raw material tank 330 are respectively communicated with the inlet of the mixing storage tank 350 through the first raw material pipeline 320 and the second raw material pipeline 340. The outlet of the mixing storage tank 350 is communicated with the inlet of the intermediate storage tank 370 through the mixing pipeline 360. The outlet of the intermediate storage tank 370 is communicated with the air inlet section 111 through the gas supply pipeline 400. Thus, when the gas from the first raw material tank 310 is preliminarily mixed with the gas from the second raw material tank 330 in the mixing storage tank 350 and then enters the intermediate storage tank 370 for further mixing, it can ensure more uniform gas mixing.

[0070] Exemplarily, the first raw material tank 310 can be a nitrogen storage tank, and the nitrogen storage tank can be communicated with a nitrogen generator to supply nitrogen through the nitrogen generator. The second raw material tank 330 can be a compressed air storage tank, and the compressed air storage tank can be communicated with an air compressor to supply compressed air through the air compressor. The first raw material pipeline 320, the second raw material pipeline 340, and the mixing pipeline 360 are all connected to the first raw material tank 310, the second raw material tank 330, and the mixing storage tank 350 by screw threads. By providing the intermediate storage tank 370 after the mixing storage tank 350, it is not only beneficial to the full mixing of the gas, but also can use the intermediate storage tank 370 to provide a buffer storage place for the gas, so as to facilitate ensuring the stable transportation of the gas and reducing the operation of frequently turning on and off the nitrogen generator and the air compressor when controlling the gas flow rate.

[0071] In some alternative embodiments, the reaction system 10 further includes: a first pressure gauge 510, a second pressure gauge 520, a third pressure gauge 530, and a fourth pressure gauge 540. The first pressure gauge 510 is arranged on the first raw material tank 310, the second pressure gauge 520 is arranged on the second raw material tank 330, the third pressure gauge 530 is arranged on the mixing storage tank 350, and the fourth pressure gauge 540 is arranged on the intermediate storage tank 370. Specifically, referring to Figure 3 , the first pressure gauge 510 is used to monitor the nitrogen pressure in the first raw material tank 310; the second pressure gauge 520 is used to monitor the compressed air pressure in the second raw material tank 330; the third pressure gauge 530 is used to monitor the mixed gas pressure in the mixing storage tank 350; the fourth pressure gauge 540 is used to monitor the mixed gas pressure in the intermediate storage tank 370. Thus, by monitoring the gas pressure in each storage tank, it is convenient to reasonably regulate the gas flow rate and is beneficial to accurately controlling the ventilation volume.

[0072] In some alternative embodiments, the reaction system 10 further includes: a first flowmeter 610 and a second flowmeter 620. The first flowmeter 610 is arranged on the first raw material pipeline 320, and the second flowmeter 620 is arranged on the second raw material pipeline 340. Specifically, referring toFigure 3 , the first flowmeter 610 can be a nitrogen laminar mass flowmeter for monitoring the nitrogen flow rate through the first raw material pipeline 320; the second flowmeter 620 can be an air laminar mass flowmeter for monitoring the compressed air flow rate through the second raw material pipeline 340. Thus, by monitoring the gas flow rate through the first flowmeter 610 and the second flowmeter 620, it is beneficial to accurately control the gas flow rate introduced into the mixing storage tank 350.

[0073] In some alternative embodiments, the reaction system 10 further includes: a first oxygen meter 710 and a second oxygen meter 720. The first oxygen meter 710 is disposed in the intermediate storage tank 370, and the second oxygen meter 720 is disposed in the reaction device 200. Specifically, referring to Figure 3 , the first oxygen meter 710 is installed on the side of the intermediate storage tank 370 by threaded connection. The detection probe of the first oxygen meter 710 extends into the intermediate storage tank 370 to achieve accurate detection of the oxygen content in the intermediate storage tank 370, so as to ensure the stability of the oxygen content in the gas input from the intermediate storage tank 370 into the reaction device 200, i.e., the reaction kettle. The second oxygen meter 720 is installed at the gas outlet of the reaction device 200 by threaded connection. The detection probe of the second oxygen meter 720 extends into the reaction kettle to detect the oxygen content of the residual gas in the reaction device 200, so as to calculate the consumed oxygen content in the reaction device 200, realize quantitative oxidation, and provide a data basis for the modeling of the oxidation process.

[0074] In some alternative embodiments, the reaction system 10 further includes: a first intermediate valve 810, a second manual valve 820, a third check valve 830, a fourth pneumatic valve 840, a first raw material valve 850, and a second raw material valve 860. The first intermediate valve 810 is disposed in the mixing pipeline 360, and the second manual valve 820, the third check valve 830, and the fourth pneumatic valve 840 are sequentially disposed in the gas supply pipeline 400 along the gas transportation direction. The first raw material valve 850 is disposed in the first raw material pipeline 320, and the second raw material valve 860 is disposed in the second raw material pipeline 340. Specifically, referring to Figure 3, a first intermediate valve 810 is disposed between the outlet of the mixing storage tank 350 and the inlet of the intermediate storage tank 370, and is used to automatically regulate the flow rate of the gas supplied from the mixing storage tank 350 to the intermediate storage tank 370. A second manual valve 820, a third check valve 830, and a fourth pneumatic valve 840 are sequentially disposed between the intermediate storage tank 370 and the reaction device 200. The second manual valve 820 is used to manually regulate the flow rate of the gas supplied from the intermediate storage tank 370 to the reaction device 200. The third check valve 830 is used to prevent the gas from flowing back into the intermediate storage tank 370. The fourth pneumatic valve 840 is used to automatically start and stop the valve through on-off control. A first raw material valve 850 is disposed on the first raw material pipeline 320 and is used to control the gas flow rate input from the first raw material tank 310 to the mixing storage tank 350. A second raw material valve 860 is disposed on the second raw material pipeline 340 and is used to control the gas flow rate input from the second raw material tank 330 to the mixing storage tank 350.

[0075] In some alternative embodiments, the reaction system 10 further includes: a control unit configured to control the gas flow rates in the first raw material pipeline 320, the second raw material pipeline 340, the mixing pipeline 360, and the gas supply pipeline 400, and thus control the flow rate and concentration of the gas entering the reaction chamber 210; wherein, the control unit is electrically connected to the first pressure gauge 510, the second pressure gauge 520, the third pressure gauge 530, and the fourth pressure gauge 540. In some alternative embodiments, the control unit is electrically connected to the first flow meter 610 and the second flow meter 620. In some alternative embodiments, the control unit is electrically connected to the first oxygen analyzer 710 and the second oxygen analyzer 720. In some alternative embodiments, the control unit is electrically connected to the first raw material valve 850, the second raw material valve 860, the first intermediate valve 810, the third check valve 830, and the fourth pneumatic valve 840.

[0076] Exemplarily, the control unit can adopt PLC control. By electrically connecting the first pressure gauge 510, the second pressure gauge 520, the third pressure gauge 530, the fourth pressure gauge 540, the first flow meter 610, the second flow meter 620, the first oxygen analyzer 710, the second oxygen analyzer 720, the first intermediate valve 810, the third check valve 830, the fourth pneumatic valve 840, the first raw material valve 850, and the second raw material valve 860 disposed on each pipeline to the control unit respectively, and performing logical programming on the control unit and specifying a specific formula system, the early warning and automatic adjustment functions of the gas flow rate and oxygen content can be realized.

[0077] Specifically, the embodiments of the present application can achieve automatic control by using a control unit. By detecting the gas oxygen content data introduced into the intermediate storage tank 370 and combining with the gas flow data detected by the first flowmeter 610 and the second flowmeter 620, the program can automatically regulate the opening and closing degrees of the first raw material valve 850 and the second raw material valve 860, thereby regulating the gas flow rates in the first raw material pipeline 320 and the second raw material pipeline 340, and ensuring the stable and controllable oxygen content input from the intermediate storage tank 370 to the reaction device 200; by detecting the residual gas oxygen content in the reaction device 200, the consumed oxygen content can be calculated, and by combining with controlling the opening and closing degree of the first intermediate valve 810 to control the gas flow rate entering the reaction kettle, the quantitative oxidation of the process can be achieved; moreover, by providing a ventilation device 100 connected to the reaction device 200, a large number of tiny bubbles can be generated when the ventilation device 100 conveys the reaction gas. Under the shearing force of the stirring in the reaction device 200, these bubbles will be instantly and fully dispersed and cover the entire reaction system, realizing the uniform dispersion of the gas in the reaction slurry and achieving the effect of uniform oxidation of the reaction system. Thus, by providing a control unit and based on the formula algorithm logic, accurate online monitoring, warning, regulation, and feedback of the oxygen content, input gas flow rate, and input oxygen content in the reaction device 200 can be achieved, while providing a data basis for process modeling, and realizing the data modeling and production line promotion of the formula system.

[0078] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.

Claims

1. An aeration device, characterized in that, Comprising: An inner tube, including an air inlet section and an air outlet section, the air outlet section being in communication with the air inlet section, and a plurality of first through holes for air outlet being provided on the side wall of the air outlet section; and An outer tube, sleeved outside the air outlet section of the inner tube and enclosing a cavity with the air outlet section of the inner tube, a plurality of second through holes being provided on the outer tube, and the inside of the inner tube being in communication with the outside of the outer tube through the first through holes, the cavity and the second through holes.

2. The ventilation device according to claim 1, characterized in that, The outer tube is detachably connected to the air inlet section or the air outlet section; and / or The aperture of the second through hole is smaller than the aperture of the first through hole; and / or The aperture of the first through hole is 2-4 mm; and / or The aperture of the second through hole is 0.1-0.2 μm; and / or The thickness of the tube wall of the outer tube is 2-3 mm; and / or The inner diameter of the outer tube is 1.5-2.0 times the outer diameter of the inner tube; and / or The outer tube is a tubular structure formed by an asymmetric metal film; and / or The cavity enclosed by the sleeve outside the air outlet section and the air outlet section is an air cavity.

3. The ventilation device according to claim 1, characterized in that, One end of the air inlet section away from the air outlet section is provided with an open structure for air inlet, and one end of the air outlet section away from the air inlet section is provided with a closed structure.

4. The ventilation device according to claim 3, wherein The length of the outer tube is less than the length of the inner tube; and / or The outer tube protrudes from one end of the air outlet section away from the air inlet section in the length direction; and / or The ventilation device is used in battery raw material production.

5. A reaction system, characterized in that, Comprising: A reaction device having a reaction chamber; And The ventilation device according to any one of claims 1-4, wherein the air outlet section and the outer tube are arranged in the reaction chamber.

6. The reaction system according to claim 5, wherein The reaction device further includes a stirring shaft and a plurality of paddle blades, the stirring shaft extends into the reaction chamber, and the plurality of paddle blades are connected to the stirring shaft and arranged along the axial direction of the stirring shaft; The highest position of the outer tube in the axial direction of the stirring shaft is not higher than the maximum arrangement height of the paddle blades in the axial direction of the stirring shaft, and the lowest position of the outer tube in the axial direction of the stirring shaft is not lower than the minimum arrangement height of the paddle blades in the axial direction of the stirring shaft.

7. The reaction system according to claim 5, wherein The reaction system further includes a gas supply assembly and a gas supply pipeline, and the gas supply assembly is in communication with the air inlet section through the gas supply pipeline; Wherein, the air inlet section is detachably connected to the gas supply pipeline; and / or the outer diameter of the air inlet section is equal to the inner diameter of the gas supply pipeline.

8. The reaction system according to claim 7, wherein The gas supply assembly includes a first raw material tank, a first raw material pipeline, a second raw material tank, a second raw material pipeline, a mixing storage tank, a mixing pipeline and an intermediate storage tank. The first raw material tank and the second raw material tank are respectively in communication with the inlet of the mixing storage tank through the first raw material pipeline and the second raw material pipeline. The outlet of the mixing storage tank is in communication with the inlet of the intermediate storage tank through the mixing pipeline, and the outlet of the intermediate storage tank is in communication with the air inlet section through the gas supply pipeline.

9. The reaction system according to claim 8, wherein The reaction system further includes: A first pressure gauge, a second pressure gauge, a third pressure gauge, and a fourth pressure gauge, wherein the first pressure gauge is disposed on the first raw material tank, the second pressure gauge is disposed on the second raw material tank, the third pressure gauge is disposed on the mixing storage tank, and the fourth pressure gauge is disposed on the intermediate storage tank; and / or A first flow meter and a second flow meter, wherein the first flow meter is disposed on the first raw material pipeline, and the second flow meter is disposed on the second raw material pipeline; and / or A first oxygen analyzer and a second oxygen analyzer, wherein the first oxygen analyzer is disposed on the intermediate storage tank, and the second oxygen analyzer is disposed on the reaction device; and / or A first intermediate valve, a second manual valve, a third check valve, a fourth pneumatic valve, a first raw material valve, and a second raw material valve, wherein the first intermediate valve is disposed on the mixing pipeline, and the second manual valve, the third check valve, and the fourth pneumatic valve are sequentially disposed on the gas supply pipeline along the gas transmission direction, the first raw material valve is disposed on the first raw material pipeline, and the second raw material valve is disposed on the second raw material pipeline.

10. The reaction system according to claim 9, wherein The reaction system further includes: A control unit configured to control the gas flow rates in the first raw material pipeline, the second raw material pipeline, the mixing pipeline, and the gas supply pipeline; Wherein, the control unit is electrically connected to the first pressure gauge, the second pressure gauge, the third pressure gauge, and the fourth pressure gauge; and / or The control unit is electrically connected to the first flow meter and the second flow meter; and / or The control unit is electrically connected to the first oxygen analyzer and the second oxygen analyzer; and / or The control unit is electrically connected to the first raw material valve, the second raw material valve, the first intermediate valve, the third check valve, and the fourth pneumatic valve.

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