Reaction kettle

Abstract

The reaction kettle comprises a kettle body and a stirring device, a guide cylinder is arranged in the kettle body and connected with the top wall of the kettle body, an annular channel is formed between the guide cylinder and the kettle body, a first opening is formed in the bottom of the guide cylinder, and at least one second opening is formed in the side wall of the guide cylinder; the guide cylinder is communicated with the annular channel through the first opening and the second opening; the stirring device is arranged in the guide cylinder in a penetrating manner; an overflow port is formed in the kettle body and is close to the top wall of the kettle body; a blocking flange is further arranged on the side wall of the guide cylinder, a gap is formed between the blocking flange and the side wall of the kettle body, and the blocking flange is located between the overflow port and the second opening. According to the invention, the uniformity of the particle size of the ternary precursor can be improved, so that the quality of the ternary precursor can be improved.

Description

Technical Field

[0001] This application relates to lithium battery material manufacturing technology, and more particularly to a reaction vessel. Background Technology

[0002] Ternary cathode materials are key components of lithium-ion batteries, directly affecting their performance. The preparation of ternary cathode materials requires the prior preparation of ternary precursors; therefore, the performance of the ternary precursors directly impacts the core physicochemical properties of the ternary cathode materials.

[0003] In the related technical solutions, the ternary precursor can be prepared by co-precipitation. Specifically, the precipitant can be added to a solution containing nickel ions, cobalt ions and aluminum ions (or manganese ions) at the same time, and the ternary precursor is obtained after precipitation. The above preparation process can be carried out in equipment such as a reaction vessel.

[0004] However, the ternary precursors prepared by the reactor of the relevant technology have poor particle size uniformity, which affects the quality of the ternary precursors. Utility Model Content

[0005] In order to overcome the above-mentioned defects in related technologies, the purpose of this application is to provide a reaction vessel that can improve the uniformity of the particle size of ternary precursors, thereby improving the quality of ternary precursors.

[0006] This application provides a reaction vessel, including a vessel body and a stirring device. A flow guide cylinder is provided inside the vessel body, and the flow guide cylinder is connected to the top wall of the vessel body. An annular channel is formed between the flow guide cylinder and the vessel body. A first opening is provided at the bottom of the flow guide cylinder, and at least one second opening is provided on the side wall of the flow guide cylinder. The flow guide cylinder is connected to the annular channel through the first opening and the second opening. The stirring device is disposed inside the flow guide cylinder.

[0007] The vessel body is provided with an overflow port, which is located near the top wall of the vessel body; the side wall of the guide tube is also provided with a blocking flange, which forms a gap with the side wall of the vessel body, and the blocking flange is located between the overflow port and the second opening.

[0008] In one possible implementation, the outer diameter of the blocking flange is 3 / 4 to 5 / 6 of the inner diameter of the vessel body.

[0009] In one possible implementation, the stirring device includes a driving component, a stirring shaft, a first stirring blade, and a second stirring blade. The output end of the driving component is connected to the stirring shaft, which passes through the top wall of the vessel. Both the first and second stirring blades are mounted on the stirring shaft, with the first stirring blade located inside the guide tube and the second stirring blade located outside the guide tube.

[0010] In one possible implementation, the second opening is located between the blocking flange and the first stirring impeller.

[0011] In one possible implementation, the dimension of the second opening along the first direction is greater than or equal to the dimension of the first stirring impeller along the first direction;

[0012] The dimension of the second opening along the second direction is 1 / 2 - 3 - 4 of the dimension of the second opening along the first direction;

[0013] Wherein, the first direction is perpendicular to the second direction, and the second direction is parallel to the axial direction of the stirring shaft.

[0014] In one possible implementation, the guide tube includes a plurality of second openings, which are spaced apart circumferentially along the guide tube.

[0015] In one possible implementation, a first flow channel is formed within the stirring shaft, the second stirring paddle includes at least one blade, the blade includes a second flow channel, the second flow channel is connected to the first flow channel; the stirring shaft also includes at least one self-priming inlet communicating with the first flow channel, and a self-priming outlet is formed at the end of the second flow channel away from the first flow channel.

[0016] In one possible implementation, the self-priming inlet is positioned 3-5 cm below the liquid surface.

[0017] In one possible implementation, the stirring shaft includes a plurality of self-priming feed ports, which are spaced apart circumferentially along the stirring shaft.

[0018] The second stirring paddle includes a plurality of blades, which are spaced apart circumferentially along the stirring shaft.

[0019] In one possible implementation, the vessel body is further provided with a plurality of baffles, which are located on the side wall of the vessel body and close to the bottom wall of the vessel body, and the plurality of baffles are spaced apart along the circumference of the vessel body.

[0020] This application provides a reaction vessel, including a vessel body and a stirring device. A guide tube is provided inside the vessel body, connected to the top wall of the vessel body, forming an annular channel between the guide tube and the vessel body. A first opening is provided at the bottom of the guide tube, and at least one second opening is provided on the side wall of the guide tube. The guide tube communicates with the annular channel through the first and second openings. The stirring device is installed inside the guide tube. An overflow port is provided on the vessel body, located near the top wall of the vessel body. A blocking flange is also provided on the side wall of the guide tube, forming a gap between the blocking flange and the side wall of the vessel body. The blocking flange is located between the overflow port and the second opening. This application separates ternary precursors of different particle sizes in a solution by providing a blocking flange on the side wall of the guide tube, utilizing the principle of inertia. Larger-sized ternary precursors have greater inertia and can pass through the gap between the blocking flange and the side wall of the vessel body, then flow out from the overflow port. Smaller-sized ternary precursors have less inertia and are blocked by the blocking flange, flowing into the guide tube through the second opening and continuing to circulate and react within the vessel body. Through the above structure, this application can improve the uniformity of the particle size of the ternary precursor, thereby improving the quality of the ternary precursor. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments or related technologies of this application, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a simplified structural diagram of a reactor in related technologies;

[0023] Figure 2 This is a simplified structural diagram of a reaction vessel provided in one embodiment of this application;

[0024] Figure 3 This is a schematic diagram illustrating the direction of liquid flow in a reactor according to an embodiment of this application.

[0025] Figure 4 An isometric view of a reaction vessel provided in an embodiment of this application;

[0026] Figure 5 This is an isometric view of a flow guide tube and a stirring device provided in an embodiment of this application;

[0027] Figure 6 A simplified structural diagram of the stirring shaft and the second stirring impeller provided in one embodiment of this application;

[0028] Figure 7 for Figure 6 A magnified view of part A in the middle.

[0029] Figure label:

[0030] 100 - Kettle body; 110 - Overflow port; 120 - Discharge port;

[0031] 200 - Stirring device; 210 - Drive component; 220 - Stirring shaft; 221 - First flow guide channel; 222 - Self-priming feed inlet; 230 - First stirring paddle; 240 - Second stirring paddle; 241 - Paddle blade; 242 - Second flow guide channel; 243 - Self-priming discharge outlet;

[0032] 300 - Flow guide tube; 310 - Second opening; 320 - Blocking flange;

[0033] 400-Baffle;

[0034] X - First direction; Y - Second direction. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0036] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0037] As described in the background section, when preparing ternary precursors, the reaction vessel of the related technology is prone to generating flow "dead zones" inside the vessel, resulting in insufficient mixing of reactants and thus affecting the quality of the ternary precursors.

[0038] Figure 1 This is a simplified structural diagram of a reaction vessel in related technologies. For example... Figure 1As shown, the reaction vessel in the related technology includes a vessel body 100 and a stirring device 200. A guide tube 300 is provided inside the vessel body 100. An overflow port 110 is provided on the vessel body 100, and the overflow port 110 is located near the top wall of the vessel body 100. An annular channel is formed between the guide tube 300 and the vessel body 100. The bottom of the guide tube 300 is open, and the side wall of the guide tube 300 has an opening to connect to the annular channel. The stirring device 200 is installed inside the guide tube 300. The stirring device 200 includes a drive component 210, a stirring shaft 220, a first stirring paddle 230, and a second stirring paddle 240. The drive component 210 is connected to the stirring shaft 220 to drive the stirring shaft 220 to rotate. The first stirring paddle 230 and the second stirring paddle 240 are both located on the stirring shaft 220, and the first stirring paddle 230 is located in the middle of the vessel body 100, while the second stirring paddle 240 is located near the bottom wall of the vessel body 100.

[0039] During the preparation of the ternary precursor, the drive unit 210 drives the first stirring paddle 230 and the second stirring paddle 240 to rotate, causing the solution in the reactor 100 to circulate between the guide tube 300 and the annular channel, thereby fully mixing to form the ternary precursor. However, driven by the first stirring paddle 230 and the second stirring paddle 240, the flow path of the solution in the reactor is irregular, resulting in poor particle size uniformity of the ternary precursor flowing out of the overflow port 110, thus affecting the quality of the ternary precursor.

[0040] Furthermore, during the preparation process, areas of the solution far from the first stirring paddle 230 and the second stirring paddle 240 (such as areas near the liquid surface or areas near the bottom wall of the vessel 100) are prone to forming flow "dead zones". The flow rate of the solution in these areas is slow, resulting in insufficient mixing of reactants, which further affects the quality of the ternary precursor.

[0041] In view of this, the present application aims to provide a reaction vessel that uses a blocking flange on a guide tube within the vessel body, located between the overflow port and the second opening, to separate ternary precursors of different particle sizes in the solution using the principle of inertia. Larger-diameter ternary precursors have greater inertia and can pass through the gap between the blocking flange and the side wall of the vessel body, flowing out from the overflow port; smaller-diameter ternary precursors have less inertia and, after being blocked by the blocking flange, flow into the guide tube through the second opening, continuing to circulate and react within the vessel body. Through this structure, the present application can improve the particle size uniformity of the ternary precursors, thereby improving their quality.

[0042] The embodiments of this application will now be described in detail with reference to the accompanying drawings, so that those skilled in the art can gain a more detailed understanding of the content of this application. It should be noted that in this embodiment, the first direction X and the second direction Y are two mutually perpendicular directions in three-dimensional space, wherein the second direction Y can be, for example, a vertical direction.

[0043] Figure 2 This is a simplified structural diagram of a reaction vessel provided in one embodiment of this application; Figure 3 This is a schematic diagram illustrating the direction of liquid flow in a reactor according to an embodiment of this application. Figure 4 An isometric view of a reaction vessel provided in an embodiment of this application; Figure 5 This is an isometric view of a flow guide tube and a stirring device provided in an embodiment of this application; Figure 6 A simplified structural diagram of the stirring shaft and the second stirring impeller provided in one embodiment of this application; Figure 7 for Figure 6 A magnified view of part A in the middle.

[0044] Please refer to Figures 2-7 This embodiment provides a reaction vessel, including a vessel body 100 and a stirring device 200. A flow guide cylinder 300 is provided inside the vessel body 100 and is connected to the top wall of the vessel body 100. Exemplarily, the vessel body 100 of this embodiment can be cylindrical or prismatic, depending on the specific requirements. The flow guide cylinder 300 can also be cylindrical or prismatic, and its shape can be adapted to the shape of the vessel body 100. The flow guide cylinder 300 can be detachably connected to the top wall of the vessel body 100 using fasteners. An annular channel is formed between the flow guide cylinder 300 and the vessel body 100. The bottom of the flow guide cylinder 300 has a first opening (not shown in the figure), which can be a through hole opened at the bottom of the flow guide cylinder 300. The side wall of the flow guide cylinder 300 has at least one second opening 310. The flow guide cylinder 300 communicates with the annular channel through the first and second openings 310, thereby forming two flow channels, inner and outer, within the vessel body 100. A stirring device 200 is installed inside the guide tube 300. The stirring device 200 can agitate the solution inside the vessel body 100, thereby ensuring thorough mixing to form a ternary precursor. An overflow port 110 is provided on the vessel body 100, located near the top wall of the vessel body 100, allowing the prepared ternary precursor to flow out. The vessel body 100 may also be provided with a discharge port 120, which can be located near the bottom wall of the vessel body 100 or directly on the bottom wall of the vessel body 100, facilitating the discharge of the solution inside the vessel body 100.

[0045] In this embodiment, a blocking flange 320 is also provided on the side wall of the guide tube 300. A gap is formed between the blocking flange 320 and the side wall of the vessel body 100. The blocking flange 320 is located between the overflow port 110 and the second opening 310 in the second direction Y.

[0046] Figure 3 The direction of liquid flow in the reactor is shown. For example... Figure 3As shown, when the stirring device 200 agitates the solution within the vessel 100, the solution generally flows within the vessel 100 along an elliptical trajectory (i.e., from the inner wall of the guide tube 300 to the first opening, from the first opening to the annular channel, and then from the annular channel back to the guide tube 300 via the second opening 310). Ternary precursors with larger particle sizes (greater than 3.6 μm) tend to separate and continue moving upwards due to inertia, passing over the blocking flange 320 to near the liquid surface and flowing out through the overflow port 110. Conversely, ternary precursors with smaller particle sizes (less than 3 μm) have less inertia; when moving upwards, they are blocked by the blocking flange 320 and, under the action of the stirring device 200, flow back to the guide tube 300 via the second opening 310, continuing to circulate along the elliptical trajectory to further react and increase their particle size. It can be understood that this embodiment can achieve the above effects by controlling the agitation force of the stirring device 200, taking into account the dimensions of the reactor.

[0047] As described above, this embodiment separates ternary precursors of different particle sizes in the solution by providing a blocking flange 320 on the side wall of the guide tube 300, utilizing the principle of inertia. Larger-diameter ternary precursors have greater inertia and can pass through the gap between the blocking flange 320 and the side wall of the vessel 100, then flow out from the overflow port 110. Smaller-diameter ternary precursors have less inertia and, after being blocked by the blocking flange 320, flow into the guide tube 300 through the second opening 310, continuing to circulate and react within the vessel 100. Through this structure, this embodiment can improve the uniformity of the ternary precursor particle size, thereby improving the quality of the ternary precursor.

[0048] Furthermore, in this embodiment, the outer diameter of the blocking flange 320 is 3 / 4 to 5 / 6 of the inner diameter of the vessel body 100, thereby keeping the gap between the blocking flange 320 and the side wall of the vessel body 100 within a reasonable range. This ensures that ternary precursors with larger particle sizes can pass through while preventing ternary precursors with smaller particle sizes from passing through, thereby improving the uniformity of the particle size of the ternary precursors flowing out of the overflow port 110.

[0049] In one possible implementation, the stirring device 200 of this embodiment includes a drive component 210, a stirring shaft 220, a first stirring paddle 230, and a second stirring paddle 240. The drive component 210 can be disposed outside the reaction vessel, for example, outside the top wall of the vessel body 100; the drive component 210 may include a motor. The output end of the drive component 210 is connected to the stirring shaft 220, which passes through the top wall of the vessel body 100. Both the first stirring paddle 230 and the second stirring paddle 240 are disposed on the stirring shaft 220, with the first stirring paddle 230 located inside the guide tube 300 and the second stirring paddle 240 located outside the guide tube 300. The specific structure of the first stirring paddle 230 and the second stirring paddle 240 can be configured as needed; for example, both the first stirring paddle 230 and the second stirring paddle 240 may include multiple blades, which may be inclined in the second direction Y to better stir the solution inside the vessel body 100. Since the first stirring paddle 230 and the second stirring paddle 240 are located at different heights inside the vessel 100, the solution inside the vessel 100 can be better stirred under the drive of the drive component 210, so that the solution is fully mixed.

[0050] Please continue to refer to Figures 2-5 In this embodiment, the second opening 310 is located between the blocking flange 320 and the first stirring paddle 230. When the first stirring paddle 230 is stirred by the above structure, the solution near the second opening 310 can be drawn into the guide tube 300, so that the ternary precursor with a smaller particle size in the solution can continue to circulate and react in the reactor body 100 to increase its particle size.

[0051] Furthermore, in this embodiment, the dimension of the second opening 310 along the first direction X is greater than or equal to the dimension of the first stirring paddle 230 along the first direction X; the dimension of the second opening 310 along the second direction Y is 1 / 2-3-4 of the dimension of the second opening 310 along the first direction X. With the above structure, the area of ​​the second opening 310 can be kept within a reasonable range, ensuring the amount of solution flowing back into the guide tube 300 through the second opening 310, and maintaining the rigidity of the guide tube 300 itself within a reasonable range.

[0052] The flow guide tube 300 of this embodiment includes a plurality of second openings 310, which are spaced apart circumferentially along the flow guide tube 300. For example, Figure 4 and Figure 5 As shown, the guide tube 300 of this embodiment is provided with four second openings 310, which are spaced apart circumferentially along the guide tube 300. It is understood that in other possible embodiments, the number of second openings 310 on the guide tube 300 may also be 2, 3, 5, etc.

[0053] Please continue to refer to Figures 2-7In this embodiment, a first flow channel 221 is formed within the stirring shaft 220, meaning that a hollow section is formed within the stirring shaft 220, which forms the first flow channel 221. The second stirring paddle 240 includes at least one blade 241, and the blade 241 includes a second flow channel 242. The blade 241 and the second flow channel 242 can be integrally formed. The second flow channel 242 is connected to the first flow channel 221. The stirring shaft 220 also includes at least one self-suction inlet 222 connected to the first flow channel 221. A self-suction outlet 243 is formed at the end of the second flow channel 242 away from the first flow channel 221. The self-suction inlet 222 can be located below the liquid surface, with the self-suction inlet 222 positioned near the top of the liquid surface, and the self-suction outlet 243 positioned near the bottom wall of the vessel body 100.

[0054] Because the flow velocity of the solution near the liquid surface and near the bottom wall of the vessel 100 is relatively slow, flow "dead zones" are easily formed. With the above structure, when the second stirring paddle 240 rotates, the linear velocity at the self-suction outlet 243 is relatively high, thus creating a negative pressure. This draws the solution near the self-suction inlet 222 near the top of the liquid surface into the stirring shaft 220. The solution flows along the first guide channel 221 within the stirring shaft 220 to the second guide channel 242, and is ejected at high speed from the self-suction outlet 243, thereby applying an impact force to the solution near the bottom wall of the vessel 100 to disturb the solution in that area. It can be understood that the above structure can reduce the range of flow "dead zones" within the vessel 100, thereby further improving the uniformity of solution mixing and helping to ensure the uniformity of the ternary precursor particle size.

[0055] In this embodiment, the self-priming feed inlet 222 is positioned 3-5 cm below the liquid surface to prevent liquid surface fluctuations from exposing the self-priming feed inlet 222 to the gas.

[0056] In this embodiment, the stirring shaft 220 includes a plurality of self-priming feed inlets 222, which are spaced apart circumferentially along the stirring shaft 220. The second stirring paddle 240 includes a plurality of blades 241, which are spaced apart circumferentially along the stirring shaft 220.

[0057] For example, the stirring shaft 220 of this embodiment may include four self-priming feed ports 222, and the corresponding second stirring paddle 240 includes four blades 241, with each of the four blades 241 corresponding to one of the four self-priming feed ports 222. It is understood that in other possible embodiments, the number of self-priming feed ports 222 and blades 241 may also be 2, 3, 5, etc.

[0058] Please continue to refer to Figures 2-5In this embodiment, the vessel body 100 is further provided with multiple baffles 400. The baffles 400 are located on the side wall of the vessel body 100 and are arranged close to the bottom wall of the vessel body 100. The multiple baffles 400 are arranged at intervals along the circumference of the vessel body 100. By setting the baffles 400, this embodiment can further reduce the range of the solution flow "dead zone" in the vessel body 100, thereby further improving the uniformity of solution mixing and helping to ensure the uniformity of the particle size of the ternary precursor.

[0059] The following experiments verify the effectiveness of the reactor in preparing the ternary precursor according to this embodiment. The experimental conditions in the embodiment and the comparative example are exactly the same. The embodiment uses the reactor described in this embodiment, while the comparative example uses... Figure 1 The reaction vessel shown in the related technology is used.

[0060] Experimental ingredients:

[0061] Prepare a mixed solution A of nickel sulfate, cobalt sulfate, and manganese sulfate with a total concentration of 2 mol / L by mixing nickel sulfate, cobalt sulfate, and manganese sulfate in a molar ratio of Ni:Co:Mn of 0:70:0.15:0.15. Prepare an aqueous solution B of NaOH with a concentration of 8 mol / L and an aqueous solution C of ammonia with a concentration of 10 mol / L.

[0062] Reactor control:

[0063] Before starting the reactor, add water to the overflow port. During water addition, continuously introduce nitrogen gas into the reactor through the nitrogen pipeline to ensure a nitrogen environment above the liquid level. Before starting the reactor and feeding the materials, adjust the pH to 11.5-12.0, the ammonia value to 2.0-2.5 g / L, and the temperature to 55℃. Maintain the flow rate of solution A at 10 L / h, the alkali flow rate of solution B at 3 L / h, and the ammonia flow rate of solution C at 4 L / h.

[0064] During the initial stage of the feed reaction, the overflow is turned on, and the pH value is maintained at 11.8-12.3 and the ammonia value at 2.5-3.0 g / L. When the particle size D50 = 2.2 ± 0.1 μm, the overflow is switched to the transfer vessel and the thickener. The thickener continuously discharges the slurry, and the discharged slurry is returned to the reactor.

[0065] The pH value was then lowered and maintained between 10.8 and 11.3, and the particle size continued to increase.

[0066] When D50 = 3.2 ± 0.1 μm, maintain the pH value between 10.0 and 10.5. When D50 = 4.2 ± 0.1 μm, shut down the machine and discharge the material.

[0067] Post-processing:

[0068] The qualified material is aged in an aging kettle at the reaction temperature for 4 hours, then filtered, washed, and dried to obtain the desired ternary precursor.

[0069] The experimental results are shown in Table 1:

[0070] Table 1 Physicochemical Data

[0071]

[0072] In Table 1, D10 indicates that 10% of the ternary precursor particles have a diameter below this value; D50 indicates that 50% of the ternary precursor particles have a diameter below this value; D90 indicates that 90% of the ternary precursor particles have a diameter below this value; SPAN is the value of (D90-D10) / D50, which characterizes the uniformity of particle size; TD represents the tap density of the ternary precursor particles; micronized particles refer to ternary precursor particles with a diameter of less than 1 μm.

[0073] As can be seen from Table 1, when the ternary precursor is prepared using the reactor of this embodiment, the uniformity of the ternary precursor particles is higher and the proportion of small particles is lower.

[0074] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0075] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0076] It should be noted that in the description of this application, the terms "first" and "second" are used only for convenience in describing different components and should not be construed as indicating or implying a sequential relationship, relative importance, or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features.

[0077] The embodiments or implementation methods in this application are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other.

[0078] In the description of this application, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with an embodiment or example that are included in at least one embodiment or example of this application. In this application, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A reaction vessel, characterized in that, The apparatus includes a vessel body (100) and a stirring device (200). A guide tube (300) is provided inside the vessel body (100), and the guide tube (300) is connected to the top wall of the vessel body (100). An annular channel is formed between the guide tube (300) and the vessel body (100). A first opening is provided at the bottom of the guide tube (300), and at least one second opening (310) is provided on the side wall of the guide tube (300). The guide tube (300) communicates with the annular channel through the first and second openings (310). The stirring device (200) is inserted inside the guide tube (300). The vessel body (100) is provided with an overflow port (110), which is located near the top wall of the vessel body (100); the side wall of the guide tube (300) is also provided with a blocking flange (320), which forms a gap with the side wall of the vessel body (100), and the blocking flange (320) is located between the overflow port (110) and the second opening (310).

2. The reaction vessel according to claim 1, characterized in that, The outer diameter of the blocking flange (320) is 3 / 4 to 5 / 6 of the inner diameter of the vessel body (100).

3. The reaction vessel according to claim 1 or 2, characterized in that, The stirring device (200) includes a driving component (210), a stirring shaft (220), a first stirring paddle (230), and a second stirring paddle (240). The output end of the driving component (210) is connected to the stirring shaft (220). The stirring shaft (220) passes through the top wall of the vessel body (100). The first stirring paddle (230) and the second stirring paddle (240) are both disposed on the stirring shaft (220). The first stirring paddle (230) is located inside the guide tube (300), and the second stirring paddle (240) is located outside the guide tube (300).

4. The reaction vessel according to claim 3, characterized in that, The second opening (310) is located between the blocking flange (320) and the first stirring blade (230).

5. The reaction vessel according to claim 4, characterized in that, The dimension of the second opening (310) along the first direction is greater than or equal to the dimension of the first stirring impeller (230) along the first direction; The dimension of the second opening (310) along the second direction is 1 / 2-3-4 of the dimension of the second opening (310) along the first direction; Wherein, the first direction is perpendicular to the second direction, and the second direction is parallel to the axial direction of the stirring shaft (220).

6. The reaction vessel according to claim 1, characterized in that, The guide tube (300) includes a plurality of second openings (310), which are spaced apart circumferentially along the guide tube (300).

7. The reaction vessel according to claim 3, characterized in that, A first flow channel (221) is formed inside the stirring shaft (220), and the second stirring paddle (240) includes at least one blade (241). The blade (241) includes a second flow channel (242), which is connected to the first flow channel (221). The stirring shaft (220) also includes at least one self-suction inlet (222) connected to the first flow channel (221), and a self-suction outlet (243) is formed at the end of the second flow channel (242) away from the first flow channel (221).

8. The reaction vessel according to claim 7, characterized in that, The self-priming feed inlet (222) is positioned 3-5 cm below the liquid surface.

9. The reaction vessel according to claim 8, characterized in that, The stirring shaft (220) includes a plurality of self-priming feed ports (222), which are spaced apart circumferentially along the stirring shaft (220); The second stirring paddle (240) includes a plurality of blades (241) which are spaced apart circumferentially along the stirring shaft (220).

10. The reaction vessel according to claim 1, characterized in that, The vessel body (100) is also provided with a plurality of baffles (400). The baffles (400) are located on the side wall of the vessel body (100) and are arranged close to the bottom wall of the vessel body (100). The plurality of baffles (400) are arranged at intervals along the circumference of the vessel body (100).

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