Reaction kettle

Abstract

The utility model provides a reaction kettle, and relates to the technical field of precursor production equipment.The reaction kettle comprises a kettle body, a stirring assembly and a flow guide assembly, the stirring assembly comprises a stirring shaft and a stirring paddle, the flow guide assembly, the stirring paddle and at least part of the stirring shaft are located in the kettle body, the stirring shaft is rotationally arranged relative to the kettle body, and the stirring paddle is coaxially connected to the stirring shaft; the flow guide assembly comprises a first flow guide piece, and the first flow guide piece is connected to the kettle body and located between the stirring paddle and the top of the kettle body; the first flow guide part is of a rotary body structure and comprises a flow guide part, the two ends of the flow guide part in the axial direction comprise a large-diameter end and a small-diameter end, the small-diameter end is located between the large-diameter end and the stirring paddle, the diameter of the flow guide part is gradually reduced from the large-diameter end to the small-diameter end, and the face, facing the stirring paddle, of the flow guide part is provided with a flow guide face. According to the reaction kettle, air in the reaction kettle is not easily involved into materials, so that the materials can be prevented from being oxidized.

Description

Technical Field

[0001] The present application relates to the technical field of precursor production equipment, and in particular to a reaction kettle. Background Art

[0002] Lithium-ion batteries are mainly composed of positive electrode materials, negative electrode materials, separators and electrolytes. The performance of positive electrode materials directly affects the performance indicators of lithium batteries, and precursors are the main raw materials of ternary positive electrode materials. Reactors are the core equipment for preparing ternary precursors. Having a suitable and stable precursor reactor is a prerequisite for producing high-quality ternary precursors.

[0003] In the related technology, the reactor includes a reactor body, a stirring shaft and a stirring paddle arranged in the reactor body. The stirring paddle will form a vortex along the stirring shaft during stirring, and the greater the stirring speed, the deeper the vortex depth. A vortex that is too deep will cause the gas in the upper layer of the liquid surface to be sucked into the slurry system and broken up and dispersed by the stirring paddle, thereby causing an indefinite amount of air to contact the material, thereby causing the precursor crystals to be partially oxidized, thereby affecting the crystallization performance and the consistency of the precursor particles. Utility Model Content

[0004] Based on this, the present application provides a reactor, in which the air in the reactor is not easily drawn into the material, thereby preventing the material from being oxidized.

[0005] The present application provides a reaction kettle, comprising a kettle body, a stirring assembly and a flow guide assembly, wherein the stirring assembly comprises a stirring shaft and a stirring paddle, the flow guide assembly, the stirring paddle and at least a part of the stirring shaft are located in the kettle body, the stirring shaft is rotatably arranged relative to the kettle body, and the stirring paddle is coaxially connected to the stirring shaft;

[0006] The flow guide assembly includes a first flow guide member, which is connected to the kettle body and is located between the stirring paddle and the top of the kettle body;

[0007] The first flow guide member includes a flow guide portion, which is a rotating body structure. The two ends of the flow guide portion along its own axial direction include a large diameter end and a small diameter end, and the small diameter end is located between the large diameter end and the stirring paddle. The diameter of the flow guide portion gradually decreases from the large diameter end to the small diameter end, and the flow guide portion has a flow guide surface on the side facing the stirring paddle.

[0008] In a possible implementation, the flow guide surface of the reactor provided in the present application is a hyperbolic surface or a conical surface.

[0009] In a possible implementation, the reactor provided in the present application has a guide surface with at least two guide ribs, which are arranged at intervals along the circumference of the flow portion, and the guide ribs extend from the small diameter end of the guide portion to the large diameter end of the guide portion.

[0010] In a possible implementation, in the reactor provided in the present application, the projection of the guide rib on the guide surface is curved, the first end of the guide rib is inclined relative to the second end of the guide rib, and the inclination directions of the guide ribs are consistent.

[0011] In a possible implementation, in the reactor provided in the present application, the first flow guide further includes a blocking portion, which is connected to the large-diameter end and is disposed around the outer circumference of the flow guide portion.

[0012] In a possible implementation, the reactor provided in the present application, the blocking portion includes a first blocking portion and a second blocking portion connected to each other, the first blocking portion is connected to the large diameter end, and extends away from the guide portion along the radial direction of the guide portion, and the second blocking portion is connected to the side of the first blocking portion away from the guide portion, and extends toward the small diameter end along the axial direction of the guide portion.

[0013] In one possible implementation, in the reactor provided in the present application, the first flow guide is sleeved on the stirring shaft, and there is a gap between the inner wall of the small diameter end and the outer wall of the stirring shaft, and the gap is greater than or equal to 3 mm and less than or equal to 5 mm.

[0014] In a possible implementation, the reactor provided in the present application has an overflow port at the top of the reactor body, the overflow port is connected to the inside and outside of the reactor body, the large diameter end is higher than the overflow port, and the small diameter end is lower than the overflow port;

[0015] The height difference between the large diameter end and the overflow port is greater than or equal to 20 cm and less than or equal to 30 cm, and / or the height difference between the small diameter end and the overflow port is greater than or equal to 20 cm and less than or equal to 30 cm.

[0016] In a possible implementation, the reactor provided in the present application, the flow guide assembly further includes a second flow guide member, the second flow guide member is connected to the reactor body, and at least two second flow guide members are arranged at intervals along the circumference of the reactor body.

[0017] In a possible implementation, the reactor provided in the present application, the stirring assembly also includes a drive motor, the drive motor is connected to the end of the stirring shaft away from the stirring paddle, and is configured to drive the stirring shaft to rotate.

[0018] The reactor provided in the present application includes a kettle body, a stirring assembly and a flow guide assembly, the stirring assembly includes a stirring shaft and a stirring paddle, the flow guide assembly includes a first flow guide, the first flow guide includes a flow guide portion, and the flow guide portion includes a large diameter end, a small diameter end and a flow guide surface. The stirring paddle and the stirring shaft are provided for stirring and mixing materials, the small diameter end is located between the large diameter end and the stirring paddle, and the diameter of the flow guide portion is gradually reduced from the large diameter end to the small diameter end, so that the large diameter end of the flow guide portion is inclined toward the stirring paddle relative to the small diameter end of the flow guide portion, and then a flow guide surface inclined toward the stirring paddle is formed in the flow guide portion, and the flow guide surface is provided to prevent the material from continuing to rotate and rise, and guide the material to flow back, thereby preventing the vortex from further deepening, thereby preventing the overly deep vortex from entraining the air above the liquid surface into the liquid, thereby preventing the material from being oxidized by air. Thus, the reactor of the present application can improve the production quality of the precursor.

[0019] In addition to the technical problems solved by the embodiments of the present application described above, the technical features that constitute the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions, other technical problems that can be solved by the reactor provided by the present application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further described in detail in the specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 A schematic diagram of the structure of a reactor provided in an embodiment of the present application;

[0022] Figure 2 A schematic diagram of the structure of the first flow guide member in the reactor provided in an embodiment of the present application;

[0023] Figure 3 for Figure 2 The main view of

[0024] Figure 4 for Figure 2 Top view of the .

[0025] Description of reference numerals:

[0026] 100- kettle body; 110- reaction chamber; 120- overflow port;

[0027] 200-stirring assembly; 210-stirring shaft; 220-stirring paddle; 230-driving motor;

[0028] 300-flow guide assembly; 310-first flow guide member; 311-flow guide portion; 3111-large diameter end; 3112-small diameter end; 3113-flow guide surface; 3114-flow guide rib; 312-blocking portion; 3121-first blocking portion; 3122-second blocking portion; 320-second flow guide member. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the present application clearer, the technical scheme in the embodiment of the present application will be described in more detail below in conjunction with the drawings in the preferred embodiments of the present application. In the drawings, the same or similar reference numerals throughout represent the same or similar parts or parts with the same or similar functions. The described embodiments are part of the embodiments of the present application, not all of the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application. The embodiments of the present application are described in detail below in conjunction with the drawings.

[0030] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0031] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are orientations or positional relationships based on the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0032] The terms "first", "second", "third" (if any) in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the application described herein can be implemented in an order other than those illustrated or described herein, for example.

[0033] In addition, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product, or display comprising a series of steps or elements is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not explicitly listed or inherent to such process, method, product, or display.

[0034] Lithium-ion batteries are mainly composed of positive electrode materials, negative electrode materials, separators and electrolytes. The performance of positive electrode materials directly affects the performance indicators of lithium batteries, and precursors are the main raw materials of ternary positive electrode materials. Reactors are the core equipment for preparing ternary precursors. Having a suitable and stable precursor reactor is a prerequisite for producing high-quality ternary precursors.

[0035] In the related technology, the reactor includes a reactor body, a stirring shaft and a stirring paddle arranged in the reactor body. The stirring paddle will form a vortex along the stirring shaft during stirring, and the greater the stirring speed, the deeper the vortex depth. A vortex that is too deep will cause the gas in the upper layer of the liquid surface to be sucked into the slurry system and broken up and dispersed by the stirring paddle, thereby causing an indefinite amount of air to contact the material, thereby causing the precursor crystals to be partially oxidized, thereby affecting the crystallization performance and the consistency of the precursor particles.

[0036] In view of the above problems, an embodiment of the present application provides a reactor, which arranges a first guide member in the reactor body and a guide surface on the side of the first guide member facing the stirring paddle to prevent the liquid in the reactor from forming a deeper vortex, thereby preventing air from being sucked into the material and causing oxidation of the material, thereby improving the production quality of the precursor.

[0037] The specific implementation of the reactor provided in the embodiment of the present application is described in detail below with reference to the accompanying drawings.

[0038] Reference Figures 1 to 4 As shown, the reaction kettle provided in the embodiment of the present application includes a kettle body 100, a stirring assembly 200 and a guide assembly 300, the stirring assembly 200 includes a stirring shaft 210 and a stirring paddle 220, the guide assembly 300, the stirring paddle 220 and at least a portion of the stirring shaft 210 are located in the kettle body 100, the stirring shaft 210 is rotatably arranged relative to the kettle body 100, and the stirring paddle 220 is coaxially connected to the stirring shaft 210 so as to rotate synchronously with the stirring shaft 210.

[0039] The flow guide assembly 300 includes a first flow guide 310, which is connected to the kettle body 100 and is located between the stirring paddle 220 and the top of the kettle body 100. The first flow guide 310 is a rotating body structure, and includes a flow guide portion 311, and the two ends of the flow guide portion 311 along its own axial direction include a large diameter end 3111 and a small diameter end 3112, and the small diameter end 3112 is located between the large diameter end 3111 and the stirring paddle 220. The diameter of the flow guide portion 311 gradually decreases from the large diameter end 3111 to the small diameter end 3112, and the flow guide portion 311 has a flow guide surface 3113 on one side facing the stirring paddle 220.

[0040] In the present application, a reaction chamber 110 is formed inside the kettle body 100 to provide a reaction site and a suitable reaction environment for the material, so that the material is stirred in the reaction chamber 110 and reacts to generate the desired precursor product.

[0041] The stirring assembly 200 is used to stir the materials in the reaction chamber 110. Specifically, the stirring assembly 200 may include a stirring shaft 210, a stirring paddle 220 and a driving motor 230. The first end of the stirring shaft 210 is located outside the reaction chamber 110, and the first end of the stirring shaft 210 is used to connect with the driving motor 230. The second end of the stirring shaft 210 is inserted into the bottom of the reaction chamber 110, and the stirring paddle 220 is connected to the second end of the stirring shaft 210, or the stirring paddle 220 is connected to the middle section of the stirring shaft 210. As long as the stirring paddle 220 extends below the liquid level of the reaction chamber 110, the mixed materials can be stirred.

[0042] The kettle body 100 may be arranged vertically, and the stirring shaft 210 may be inserted into the reaction chamber 110 from the top of the kettle body 100 , or may be inserted into the reaction chamber 110 from the bottom of the kettle body 100 .

[0043] When the stirring paddle 220 stirs the material, it will cause the liquid to produce a strong rotating flow, thereby forming a vortex effect, thereby effectively mixing various materials. However, the deeper vortex will draw the air above the liquid surface into the material, causing the stirring paddle 220 to break up the air and disperse it into the material, and react with part of the material to produce an oxidation reaction, thereby causing part of the material to be oxidized, and a purer precursor product cannot be obtained.

[0044] In order to avoid this situation, the reactor of the embodiment of the present application is provided with a guide component 300, which can prevent the material from forming a deeper vortex and stabilize the liquid level. Specifically, the guide component 300 may include a first guide member 310, which is connected to the cavity wall of the reaction chamber 110 to fix the first guide member 310 on the reactor body 100. Since the first guide member 310 is mainly used to prevent the surface of the liquid from forming a deeper vortex, the first guide member 310 is arranged between the stirring paddle 220 and the top of the reactor body 100, that is, at least part of the first guide member 310 is located below the liquid surface to contact with the material, thereby preventing the material below the liquid surface from forming a deeper vortex, and at least part of the first guide member 310 is located above the liquid surface to prevent the material from continuing to rise and causing the liquid level to continue to rise, thereby preventing the material from forming a deeper vortex.

[0045] The first flow guide 310 may be a rotating body structure, and the stirring paddle 220 and the stirring shaft 210 may rotate relative to the first flow guide 310 .

[0046] In a specific implementation, the first flow guide 310 includes a flow guide portion 311, and the two ends of the flow guide portion 311 along its own axial direction include a large diameter end 3111 and a small diameter end 3112, and the small diameter end 3112 is located between the large diameter end 3111 and the stirring paddle 220. The diameter of the flow guide portion 311 gradually decreases from the large diameter end 3111 to the small diameter end 3112, and the flow guide portion 311 has a flow guide surface 3113 on the side facing the stirring paddle 220.

[0047] In this way, the guide surface 3113 formed between the large diameter end 3111 and the small diameter end 3112 is inclined relative to the liquid surface. When the liquid rotates and forms a vortex, the liquid will collide with the guide surface 3113. The guide surface 3113 prevents the liquid from continuing to rise and guides the liquid to flow back, and then makes the liquid flow back to below the liquid surface. This can effectively stabilize the fluctuation of the liquid surface and prevent the vortex from deepening further, thereby preventing the deeper vortex from drawing the air above the liquid surface into the liquid, thereby preventing the material from being oxidized by the air.

[0048] The reactor provided in the embodiment of the present application includes a reactor body 100, a stirring assembly 200 and a flow guide assembly 300, the stirring assembly 200 includes a stirring shaft 210 and a stirring paddle 220, the flow guide assembly 300 includes a first flow guide member 310, the first flow guide member 310 includes a flow guide portion 311, the flow guide portion 311 includes a large diameter end 3111, a small diameter end 3112 and a flow guide surface 3113. By setting the stirring paddle 220 and the stirring shaft 210 for stirring and mixing the materials, the small diameter end 3112 is located between the large diameter end 3111 and the stirring paddle 220, and the diameter of the guide portion 311 is gradually reduced from the large diameter end 3111 to the small diameter end 3112, so that the large diameter end 3111 of the guide portion 311 is inclined toward the stirring paddle 220 relative to the small diameter end 3112 of the guide portion 311, and then a guide surface 3113 inclined toward the stirring paddle 220 is formed in the guide portion 311, and the guide surface 3113 is set to prevent the material from continuing to rotate and rise, and guide the material to flow back, thereby preventing the vortex from further deepening, thereby preventing the too deep vortex from entraining the air above the liquid surface into the liquid, thereby preventing the material from being oxidized by the air. Thus, the reactor of the embodiment of the present application can improve the production quality of the precursor.

[0049] In a possible implementation, the guide surface 3113 is a hyperbolic surface or a conical surface. That is, the guide portion 311 can be a hyperbolic surface structure or a conical structure. When the guide portion 311 is a hyperbolic surface structure, the guide surface 3113 is a hyperbolic surface. When the guide portion 311 is a conical structure, the guide surface 3113 is a conical surface.

[0050] Regardless of whether the guide portion 311 is a hyperbolic surface structure or a conical structure, the large diameter end 3111 of the guide portion 311 can be tilted toward the stirring paddle 220 relative to the small diameter end 3112 of the guide portion 311, and then a guide surface 3113 tilted relative to the stirring shaft 210 can be formed in the guide portion 311, so that after the liquid contacts the guide surface 3113, it can flow back along the tilted direction of the guide surface 3113, thereby preventing the liquid from continuing to rotate and flow to form a deeper vortex.

[0051] Reference Figures 2 to 4 As shown, in some embodiments, the guide surface 3113 is provided with at least two guide ribs 3114 , and the at least two guide ribs 3114 are arranged at intervals along the circumference of the flow portion, and the guide ribs 3114 extend from the small diameter end 3112 of the guide portion 311 to the large diameter end 3111 of the guide portion 311 .

[0052] In this way, the guide ribs 3114 have an obstructive effect on the liquid. The guide ribs 3114 can slow down the tendency of the liquid to continue to rotate and rise, thereby preventing the liquid from continuing to rotate and rise under the centrifugal force of the stirring paddle 220 to form a deeper vortex, thereby effectively preventing the material from being oxidized by air.

[0053] The projection of the guide rib 3114 on the guide surface 3113 may be a straight line, that is, the guide rib 3114 may extend along a straight line from the small diameter end 3112 of the guide portion 311 to the large diameter end 3111 of the guide portion 311 .

[0054] Continue to refer to Figures 2 to 4 As shown, in a possible implementation, the projection of the guide rib 3114 on the guide surface 3113 is curved, the first end of the guide rib 3114 is inclined relative to the second end of the guide rib 3114, and the inclination directions of the guide ribs 3114 are consistent.

[0055] When the liquid is stirred by the stirring paddle 220, the liquid is in a rotating flow state, and its rotation direction is consistent with the rotation direction of the stirring paddle 220. The inclination direction of the guide rib 3114 can be opposite to the rotation direction of the stirring paddle 220, so that the guide rib 3114 can effectively block the liquid.

[0056] Continue to refer to Figures 2 to 4 As shown, in a possible implementation, in the reactor provided in the present application, the first flow guide 310 further includes a blocking portion 312 , which is connected to the large diameter end 3111 and is disposed around the outer peripheral side of the flow guide portion 311 .

[0057] With such arrangement, when the liquid impacts upward, the blocking portion 312 can prevent the liquid from continuing to flow upward, and then allow the liquid to flow back along the guide surface 3113, thereby stabilizing the fluctuation amplitude of the liquid level and keeping the overflow material amount constant, thereby avoiding the blockage of the material pipe caused by pulse overflow.

[0058] Reference Figure 2 As shown, in a specific implementation, the blocking portion 312 includes a first blocking portion 3121 and a second blocking portion 3122 which are connected to each other, the first blocking portion 3121 is connected to the large diameter end 3111, and extends away from the guide portion 311 along the radial direction of the guide portion 311, and the second blocking portion 3122 is connected to a side of the first blocking portion 3121 away from the guide portion 311, and extends toward the small diameter end 3112 along the axial direction of the guide portion 311.

[0059] That is to say, the second blocking portion 3122 is folded toward the stirring paddle 220 relative to the first blocking portion 3121, so that a blocking space is formed among the first blocking portion 3121, the second blocking portion 3122 and the guide surface 3113. When the liquid is subjected to a large centrifugal force and flows into the blocking space, the first blocking portion 3121, the second blocking portion 3122 and the guide surface 3113 all have a blocking effect on the liquid, which can prevent the liquid from further rising and guide the liquid to flow back, thereby avoiding large fluctuations in the liquid level, thereby avoiding the problem of decreased batch consistency, material bubbling and material blockage caused by liquid level fluctuations.

[0060] In a possible implementation, the first flow guide 310 is sleeved on the stirring shaft 210, and there is a gap between the inner wall of the small diameter end 3112 and the outer wall of the stirring shaft 210, and the gap is greater than or equal to 3 mm and less than or equal to 5 mm.

[0061] With such a configuration, when the first flow guide member 310 is sleeved on the stirring shaft 210 and the stirring shaft 210 rotates relative to the first flow guide member 310, due to the gap between the stirring shaft 210 and the first flow guide member 310, friction between the stirring shaft 210 and the first flow guide member 310 can be avoided, thereby avoiding wear of the stirring shaft 210 and the first flow guide member 310.

[0062] In addition, since one or both of the first flow guide 310 and the stirring shaft 210 are metal parts, metal debris will be generated when the two rub against each other, and after entering the material, magnetic foreign matter will be included in the precursor product. Therefore, a reasonable gap should be set between the inner wall of the small diameter end 3112 and the outer wall of the stirring shaft 210. For example, the gap can be any one of 3mm, 3.6mm, 4mm, 5mm, or within any two numerical ranges.

[0063] Reference Figure 1 As shown, in a possible implementation, the upper portion of the kettle body 100 has an overflow port 120 , the overflow port 120 is connected to the inside and outside of the kettle body 100 , the large diameter end 3111 is higher than the overflow port 120 , and the small diameter end 3112 is lower than the overflow port 120 .

[0064] It should be understood that the two ends of the overflow port 120 are respectively connected to the reaction chamber 110 and the material pipe. When the liquid level rises, the liquid will overflow from the overflow port 120 to the material pipe, and the large diameter end 3111 is higher than the overflow port 120. Therefore, the height of the overflow port 120 is level with the liquid level, the large diameter end 3111 is higher than the overflow port 120, and the small diameter end 3112 is lower than the overflow port 120, that is, at least part of the guide portion 311 is located below the liquid surface, and at least part of the guide portion 311 is located above the liquid surface.

[0065] In some embodiments, the height difference between the large diameter end 3111 and the overflow port 120 is greater than or equal to 20 cm and less than or equal to 30 cm, and the height difference between the small diameter end 3112 and the overflow port 120 is greater than or equal to 20 cm and less than or equal to 30 cm.

[0066] In other embodiments, the height difference between the large diameter end 3111 and the overflow port 120 is greater than or equal to 20 cm and less than or equal to 30 cm, or the height difference between the small diameter end 3112 and the overflow port 120 is greater than or equal to 20 cm and less than or equal to 30 cm.

[0067] In this way, the height of the guide part 311 can be set according to the size of the kettle body 100, as long as the large diameter end 3111 is 20 to 30 cm higher than the overflow port 120 and the small diameter end 3112 is 20 to 30 cm lower than the overflow port 120.

[0068] Exemplarily, the height difference between the large diameter end 3111 and the overflow port 120 can be any one of 20cm, 22cm, 25cm, 30cm or within any two numerical ranges, and the height difference between the small diameter end 3112 and the overflow port 120 can be any one of 20cm, 23cm, 28cm, 30cm or within any two numerical ranges.

[0069] Reference Figure 1 As shown, in some embodiments, the flow guide assembly 300 further includes a second flow guide 320, which is connected to the kettle body 100, and at least two second flow guides 320 are arranged at intervals along the circumference of the kettle body 100. For example, 3 to 6 second flow guides 320 can be arranged at intervals along the circumference of the kettle body 100.

[0070] In this way, the first guide member 310 and the second guide member 320 work together to keep the liquid level in the reaction chamber 110 stable, avoid pulsed discharge caused by liquid level fluctuations, and thus keep the discharge volume and solid content of the reactor stable per unit time, thereby reducing reactor shutdown caused by blockage.

[0071] Reference Figure 1 As shown, in a possible implementation, the stirring assembly 200 further includes a driving motor 230 , which is connected to an end of the stirring shaft 210 away from the stirring paddle 220 and is configured to drive the stirring shaft 210 to rotate.

[0072] With such configuration, the driving motor 230 can drive the stirring shaft 210 to rotate, and then the stirring shaft 210 drives the stirring paddle 220 to rotate synchronously, thereby stirring the material in the reaction chamber 110 .

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A reaction kettle, characterized in that: It comprises a kettle body, a stirring assembly and a flow guide assembly, wherein the stirring assembly comprises a stirring shaft and a stirring paddle, the flow guide assembly, the stirring paddle and at least a part of the stirring shaft are located in the kettle body, the stirring shaft is rotatably arranged relative to the kettle body, and the stirring paddle is coaxially connected to the stirring shaft; The flow guide assembly includes a first flow guide member, which is connected to the kettle body and is located between the stirring paddle and the top of the kettle body; The first flow guide member includes a flow guide portion, which is a rotating body structure. The two ends of the flow guide portion along its own axial direction include a large diameter end and a small diameter end, and the small diameter end is located between the large diameter end and the stirring paddle. The diameter of the flow guide portion gradually decreases from the large diameter end to the small diameter end, and the flow guide portion has a flow guide surface on a side facing the stirring paddle.

2. The reactor according to claim 1, characterized in that: The guide surface is a hyperbolic surface or a conical surface.

3. The reactor according to claim 1 or 2, characterized in that: The guide surface is provided with at least two guide ribs, and the at least two guide ribs are arranged at intervals along the circumference of the guide portion, and the guide ribs extend from the small diameter end of the guide portion to the large diameter end of the guide portion.

4. The reactor according to claim 3, characterized in that: The projection of the guide rib on the guide surface is in a curved shape, the first end of the guide rib is inclined relative to the second end of the guide rib, and the inclination direction of each guide rib is consistent.

5. The reactor according to claim 1 or 2, characterized in that: The first flow guide also includes a blocking portion, which is connected to the large-diameter end and is arranged around the outer peripheral side of the flow guide portion.

6. The reactor according to claim 5, characterized in that: The blocking portion includes a first blocking portion and a second blocking portion connected to each other, wherein the first blocking portion is connected to the large diameter end and extends away from the guide portion in the radial direction of the guide portion, and the second blocking portion is connected to a side of the first blocking portion away from the guide portion and extends toward the small diameter end along the axial direction of the guide portion.

7. The reactor according to claim 1 or 2, characterized in that: The first flow guide is sleeved on the stirring shaft, and there is a gap between the inner wall of the small diameter end and the outer wall of the stirring shaft, and the gap is greater than or equal to 3 mm, and the gap is less than or equal to 5 mm.

8. The reactor according to claim 1 or 2, characterized in that: The upper part of the kettle body is provided with an overflow port, the overflow port is connected to the inside and outside of the kettle body, the large diameter end is higher than the overflow port, and the small diameter end is lower than the overflow port; The height difference between the large diameter end and the overflow port is greater than or equal to 20 cm and less than or equal to 30 cm, and / or the height difference between the small diameter end and the overflow port is greater than or equal to 20 cm and less than or equal to 30 cm.

9. The reactor according to claim 1 or 2, characterized in that: The flow guide assembly further includes a second flow guide member, which is connected to the kettle body, and at least two of the second flow guide members are arranged at intervals along the circumference of the kettle body.

10. The reactor according to claim 1 or 2, characterized in that: The stirring assembly further includes a driving motor, which is connected to an end of the stirring shaft away from the stirring paddle and is configured to drive the stirring shaft to rotate.

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