Reaction device

Abstract

The utility model provides a reaction device which comprises a reaction kettle provided with a reaction cavity; the stirring structure is rotatably arranged in the reaction cavity, the stirring structure comprises a stirring shaft, an axial flow stirring paddle arranged on the stirring shaft and an outward pushing stirring paddle arranged on the stirring shaft, and the outward pushing stirring paddle is arranged at the lower part of the stirring shaft; the guide cylinder is arranged in the reaction kettle and arranged on the periphery of the stirring structure in a sleeving manner, the axial flow stirring paddle is located in the guide cylinder, and the outward pushing stirring paddle is located below the guide cylinder. According to the technical scheme, the problem that a precipitation device in the related technology is insufficient in stirring can be effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical equipment, in particular to a reaction device. Background Art

[0002] Lithium carbonate is the most important lithium salt among lithium compounds and the main raw material for preparing high-purity lithium compounds and lithium alloys. It has broad application prospects in glass and ceramic manufacturing, medicine, non-ferrous metal smelting, lithium battery electrode materials and other fields.

[0003] The existing battery-grade lithium carbonate production is basically to make industrial-grade lithium carbonate / crude lithium carbonate pass through CO2 to form LiHCO3 solution, use ion exchange resin to further remove impurities, and then decompose LiHCO3 by pyrolysis, recrystallize into Li2CO3, and then obtain battery-grade lithium carbonate products after centrifugal washing and drying. The process is cumbersome and complicated, which is easy to cause lithium carbonate loss and reduce the yield. In addition, the existing lithium precipitation device is not stirred sufficiently, which is easy to cause the crystal particles of lithium carbonate to be too large and the grains to be uneven during the lithium precipitation process, and the Na + 、SO4 2- Impurities are wrapped in the grains and product quality is affected. Utility Model Content

[0004] The main purpose of the utility model is to provide a reaction device to solve the problem of insufficient stirring of the precipitation device in the related art.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a reaction device, including: a reactor having a reaction chamber; a stirring structure rotatably arranged in the reaction chamber, the stirring structure including a stirring shaft, an axial flow stirring paddle arranged on the stirring shaft and an extrapolated stirring paddle arranged on the stirring shaft, the extrapolated stirring paddle being arranged at the lower part of the stirring shaft; a guide tube, arranged in the reactor and sleeved on the outer periphery of the stirring structure, wherein the axial flow stirring paddle is located in the guide tube and the extrapolated stirring paddle is located below the guide tube.

[0006] Furthermore, the reaction device also includes a plurality of vertical baffles arranged on the inner wall surface of the reactor at intervals along the circumferential direction.

[0007] Furthermore, the outward pushing stirring paddle includes a plurality of outward pushing blades spaced apart along the circumferential direction of the stirring shaft, and in the direction from the inside to the outside of the stirring shaft, the outward pushing blades extend in a direction away from the rotation direction of the stirring structure.

[0008] Furthermore, the cross-section of the extrapolated blade satisfies the logarithmic spiral formula; and / or, the extrapolated stirring paddle also includes a sleeve portion and a connecting ring, the sleeve portion is sleeved on the lower end of the stirring shaft, the inner ends of the multiple extrapolated blades are connected to the sleeve portion, and the connecting ring is connected to the outer ends of the multiple extrapolated blades.

[0009] Furthermore, the reaction device also includes a feed pipe extending into the reaction chamber, the feed pipe has a first discharge port, and the first discharge port is located outside the outward-pushing stirring paddle.

[0010] Furthermore, the feed pipe includes a vertical pipe section and an inclined pipe section, the upper end of the inclined pipe section is connected to the lower end of the vertical pipe section, the first discharge port is formed at the lower end of the inclined pipe section, and the inclined pipe section extends inward from top to bottom; and / or, the reaction device includes multiple feed pipes, and the multiple feed pipes are spaced apart in the circumferential direction of the reactor.

[0011] Furthermore, the feed pipe includes a vertical pipe section and an inclined pipe section, the upper end of the inclined pipe section is connected to the lower end of the vertical pipe section, and the first discharge port is formed at the lower end of the inclined pipe section. In the direction from the upper end to the lower end of the inclined pipe section, the inclined pipe section extends inward and the cross-sectional size of the inclined pipe section gradually decreases.

[0012] Furthermore, a feed port is provided at the top of the reactor; and / or the guide tube includes a contraction section and a straight tube section connected to the lower end of the contraction section, and the lateral dimension of the contraction section gradually decreases from top to bottom.

[0013] Furthermore, a second discharge port is provided at the bottom of the reaction kettle, and the reaction device further comprises a filter cover located in the reaction chamber and covering the second discharge port.

[0014] Furthermore, the reaction device also includes a heating structure arranged outside the reactor, the heating structure includes an insulation sleeve arranged on the outer periphery of the reactor and a steam inlet and a condensation outlet arranged on the insulation sleeve, and a heating space is formed between the insulation sleeve and the reactor.

[0015] Applying the technical solution of the utility model, the reactor provides a reaction space for the reaction solution; the stirring structure is rotatably arranged in the reaction chamber, and the stirring structure includes a stirring shaft, an axial flow stirring paddle and an extrapolated stirring paddle, wherein the axial flow stirring paddle can make the reaction solution flow along the height direction of the reactor; the extrapolated stirring paddle can push the reaction solution outward; the guide tube is sleeved on the periphery of the stirring structure, and the reaction chamber is divided into an internal space located inside it and an external space located outside it, the axial flow stirring paddle is located in the internal space and drives the reaction solution located in the internal space to flow downward, the extrapolated stirring paddle is located in the external space and is located below the internal space, the extrapolated stirring paddle can push the reaction solution transported by the axial flow stirring paddle outward so that the reaction solution flows from the inside to the outside, and due to the lack of liquid above the axial flow stirring paddle, the reaction solution located in the external space flows in the direction of the axial flow stirring paddle to form an orderly liquid circulation, so that the reaction solution can fully flow and be stirred in the reaction chamber, and the uniformity of stirring is improved. Therefore, the technical solution of the present application can effectively solve the problem of insufficient stirring of the precipitation device in the related art. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0017] Figure 1 A cross-sectional schematic diagram of an embodiment of a reaction device according to the utility model is shown;

[0018] Figure 2 Shows Figure 1 An enlarged view of the reaction device at A;

[0019] Figure 3 Shows Figure 1 Schematic diagram of the three-dimensional structure of the extrapolated stirring paddle of the reaction device.

[0020] The above drawings include the following reference numerals:

[0021] 10. Reactor; 11. Reaction chamber; 12. Feed inlet; 13. Second discharge outlet; 14. Support legs; 15. Lifting lugs; 16. Manhole;

[0022] 20. stirring structure; 21. stirring shaft; 22. axial flow stirring paddle; 23. push-out stirring paddle; 231. push-out paddle blade; 232. sleeve portion; 233. connecting ring;

[0023] 30. Guide tube; 31. Contraction section; 32. Straight section;

[0024] 40. Vertical baffle;

[0025] 50. Feed pipe; 51. First discharge port; 52. Vertical pipe section; 53. Oblique pipe section;

[0026] 60. Filter cover;

[0027] 70. Heating structure; 71. Insulation sleeve; 72. Steam inlet; 73. Condensation outlet; 74. Heating space. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0029] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0030] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps described in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0031] like Figure 1 As shown, the present application provides a reaction device, and an embodiment of the reaction device of the present application includes: a reactor 10, a stirring structure 20 and a guide tube 30. The reactor 10 has a reaction chamber 11; the stirring structure 20 is rotatably arranged in the reaction chamber 11, and the stirring structure 20 includes a stirring shaft 21, an axial flow stirring paddle 22 arranged on the stirring shaft 21, and an extrapolated stirring paddle 23 arranged on the stirring shaft 21, and the extrapolated stirring paddle 23 is arranged at the lower part of the stirring shaft 21; the guide tube 30 is arranged in the reactor 10 and sleeved on the outer periphery of the stirring structure 20, wherein the axial flow stirring paddle 22 is located in the guide tube 30, and the extrapolated stirring paddle 23 is located below the guide tube 30.

[0032] According to the technical solution of the present embodiment, the reactor 10 provides a reaction space for the reaction solution; the stirring structure 20 is rotatably arranged in the reaction chamber 11, and the stirring structure 20 includes a stirring shaft 21, an axial flow stirring paddle 22 and an extrapolation stirring paddle 23, wherein the axial flow stirring paddle 22 can make the reaction solution flow along the height direction of the reactor 10; the extrapolation stirring paddle 23 can push the reaction solution outward; the guide tube 30 is sleeved on the outer periphery of the stirring structure 20, and divides the reaction chamber 11 into an internal space located inside and an external space located outside, the axial flow stirring paddle 22 is located in the internal space and drives the reaction solution located in the internal space to flow downward, the extrapolation stirring paddle 23 is located in the external space and is located below the internal space, the extrapolation stirring paddle 23 can push the reaction solution transported by the axial flow stirring paddle 22 outward so that the reaction solution flows from the inside to the outside, and due to the lack of liquid above the axial flow stirring paddle 22, the reaction solution located in the external space flows toward the axial flow stirring paddle 22 to form an orderly liquid circulation ( Figure 1 The arrowed curve in the figure shows the flow direction of the reaction solution, so that the reaction solution can fully flow and be stirred in the reaction chamber 11, thereby improving the uniformity of stirring. Therefore, the technical solution of this embodiment can effectively solve the problem of insufficient stirring of the precipitation device in the related art.

[0033] Specifically, the reaction device of this embodiment can be used for the production of battery-grade lithium carbonate, specifically, it can be used for mixing lithium sulfate solution and sodium carbonate solution; of course, the reaction device of this embodiment can also be used for the precipitation of other chemical products.

[0034] like Figure 1 and Figure 2 As shown, the reaction device further includes a plurality of vertical baffles 40 spaced apart along the circumferential direction on the inner wall surface of the reactor 10. The vertical baffles 40 can guide the liquid located at the periphery of the guide tube 30 so that the liquid moves along the vertical direction to avoid mixed flow.

[0035] like Figure 3 As shown, the outward pushing paddle 23 includes a plurality of outward pushing blades 231 spaced apart along the circumferential direction of the stirring shaft 21, and in the direction from the inside to the outside of the stirring shaft 21, the outward pushing blades 231 extend in a direction away from the rotation direction of the stirring structure 20. When the outward pushing paddle 23 rotates, the liquid is thrown out along the outer convex surface of the outward pushing blade 231, achieving the effect of pushing the fluid outward.

[0036] Preferably, the cross section of the extrapolation blade 231 satisfies the logarithmic spiral formula. The cross section of the extrapolation blade 231 satisfies the logarithmic spiral formula, which can ensure the extrapolation effect.

[0037] Of course, in an embodiment not shown in the figure, a turbine propeller can also be used as an extrapolated stirring propeller.

[0038] like Figure 3 As shown, the extrapolated stirring paddle 23 further includes a sleeve portion 232 and a connecting ring 233. The sleeve portion 232 is sleeved on the lower end of the stirring shaft 21, the inner ends of the plurality of extrapolated blades 231 are connected to the sleeve portion 232, and the connecting ring 233 is connected to the outer ends of the plurality of extrapolated blades 231. By providing the connecting ring 233 on the outer ends of the plurality of extrapolated blades 231, the outer ends of the extrapolated blades 231 can be reinforced, thereby increasing the structural strength of the extrapolated stirring paddle 23.

[0039] Specifically, in this embodiment, the connecting ring 233 is connected above the outer push blade 231. The sleeve portion 232 and the connecting ring 233 are arranged at intervals, and the outer push blade 231 divides the area between the sleeve portion 232 and the connecting ring 233 into a plurality of flow passages, so that the liquid can flow smoothly downward through the flow passages, thereby ensuring the smoothness of the entire cycle, so that the generated lithium carbonate particles are fine and uniform without agglomeration.

[0040] like Figure 1 As shown, the stirring shaft 21 is located in the middle of the reactor 10 and passes upwardly out of the reactor 10. The reaction device also includes a motor, a reducer and a coupling arranged above the reactor 1. The stirring shaft 21 is connected to the motor and the reducer by the coupling.

[0041] like Figure 1 and Figure 2 As shown, the reaction device also includes a feed pipe 50 extending into the reaction chamber 11, and the feed pipe 50 has a first discharge port 51, and the first discharge port 51 is located on the outside of the extrapolated stirring paddle 23. Among them, the feed pipe 50 is used to pass the lithium sulfate purified liquid. It should be noted that the above-mentioned "the first discharge port 51 is located on the outside of the extrapolated stirring paddle 23" refers to the overlap of the first discharge port 51 and the extrapolated stirring paddle 23 in the height direction of the reactor 10, and the feed pipe 50 can pass the lithium sulfate purified liquid into the reactor 10 and send it to the edge of the extrapolated stirring paddle 23. The shear force generated by the extrapolated paddle 231 can fully crush and disperse the lithium sulfate particles, so that the lithium sulfate purified liquid is distributed as evenly as possible.

[0042] like Figure 1 and Figure 2 As shown, the feed pipe 50 includes a vertical pipe section 52 and an inclined pipe section 53, the upper end of the inclined pipe section 53 is connected to the lower end of the vertical pipe section 52, and the first discharge port 51 is formed at the lower end of the inclined pipe section 53. In the direction from top to bottom, the inclined pipe section 53 extends inward. Among them, the vertical pipe section 52 is located outside the guide tube 30. By arranging the inclined pipe section 53 at the lower end of the vertical pipe section 52, the vertical pipe section 52 can be arranged at a position close to the inner wall surface of the reactor 10, so as to avoid affecting the structural strength of the vertical pipe section 52 when the stirring structure 20 rotates, and at the same time, the first discharge port 51 can be arranged close to the outward-pushing stirring paddle 23 to ensure the crushing and dispersion effect.

[0043] like Figure 1 As shown, the reaction device includes a plurality of feed pipes 50, and the plurality of feed pipes 50 are arranged at intervals in the circumferential direction of the reactor 10. The plurality of feed pipes 50 are arranged at intervals along the circumferential direction of the reactor 10, so that the lithium sulfate purification liquid can be introduced into the reactor 1 at multiple points, further ensuring the uniformity of mixing.

[0044] like Figure 1 and Figure 2 As shown, in the direction from the upper end to the lower end of the inclined pipe section 53, the inclined pipe section 53 extends inward and the cross-sectional size of the inclined pipe section 53 gradually decreases. When arranging the feed pipe 50, the lower end of the inclined pipe section 53 needs to maintain a certain distance from the extrapolated stirring paddle 23 to avoid damaging the inclined pipe section 53, so that the cross-sectional size of the inclined pipe section 53 is gradually reduced, which can increase the liquid flow rate at the first discharge port 51, so that the liquid transported by the feed pipe 50 can be as close to the extrapolated stirring paddle 23 as possible, so that the lithium sulfate purified liquid can be transported to the area with the best stirring effect, thereby ensuring the crushing and dispersion effect of the lithium sulfate particles.

[0045] like Figure 1 As shown, a feed port 12 is provided on the top of the reactor 10. The feed port 12 is used to introduce a sufficient amount of sodium carbonate solution into the reactor 10 at one time before the reaction starts; during the reaction, lithium sulfate purification solution is gradually introduced into the reactor 10 through the feed pipe 50.

[0046] Specifically, in this embodiment, there are multiple feed pipes 50 and multiple vertical baffles 40. Preferably, the number of feed pipes 50 and the number of vertical baffles 40 are the same and both are 4, and one feed pipe 50 is disposed between each two adjacent vertical baffles 40.

[0047] like Figure 1 As shown, the guide tube 30 includes a contraction section 31 and a straight section 32 connected to the lower end of the contraction section 31. From top to bottom, the transverse dimension of the contraction section 31 gradually decreases. Specifically, in this embodiment, the contraction section 31 is a truncated cone structure, and the straight section 32 is a cylindrical structure. The extension trend of the contraction section 31 is the same as the flow direction of the fluid, which plays a good guiding role for the liquid.

[0048] like Figure 1 As shown, a second discharge port 13 is provided at the bottom of the reactor 10, and the reaction device further comprises a filter cover 60 located in the reaction chamber 11 and covering the second discharge port 13. The filter cover 60 can filter the impurity particles in the liquid after the reaction is completed, while preventing the second discharge port 13 from being blocked.

[0049] like Figure 1As shown, the reaction device further includes a heating structure 70 disposed outside the reactor 10, the heating structure 70 includes a heat preservation sleeve 71 sleeved on the outer periphery of the reactor 10, and a steam inlet 72 and a condensation outlet 73 disposed on the heat preservation sleeve 71, and a heating space 74 is formed between the heat preservation sleeve 71 and the reactor 10. Specifically, steam can be introduced into the heating space 74 through the steam inlet 72 to heat or keep the reactor 10 warm, thereby providing a suitable reaction temperature, and condensed water formed after the steam condenses can be discharged through the condensation outlet 73.

[0050] like Figure 1 As shown, the reaction device also includes legs 14 arranged below the reactor 10 for supporting the entire reaction device and a plurality of lifting ears 15 arranged around the reactor 10. A manhole 16 is also provided on the side wall of the reactor 10 to facilitate the staff to check and repair the interior of the reactor 10.

[0051] In the art, the commonly used method for preparing battery-grade lithium carbonate is: industrial-grade lithium carbonate / crude lithium carbonate is subjected to CO2 to form a LiHCO3 solution, further deep impurities are removed by ion exchange resin, and then LiHCO3 is decomposed by pyrolysis, recrystallized into Li2CO3, and then centrifuged, washed, and dried to obtain a battery-grade lithium carbonate product. The above preparation method has the following disadvantages:

[0052] (1) Lithium carbonate is carbonized to LiHCO3 and then recrystallized to Li2CO3 through pyrolysis. The process is complicated and energy-intensive.

[0053] (2) The utilization rate of CO2 during carbonization is low, which easily leads to greenhouse gas emissions. At the same time, the quality and effect of the carbonization reaction are not easy to control;

[0054] (3) Lithium carbonate is carbonized, impurities are removed, and then pyrolyzed. This process results in lithium carbonate loss and reduces product yield.

[0055] The lithium carbonate product generated by the reaction device of this embodiment is produced by passing the lithium sulfate purified liquid into the reactor 10 containing the sodium carbonate solution, and the lithium sulfate solution is uniformly fed to the outer edge of the lower extrapolated stirring paddle 23 by the feed pipe 50, and the lithium sulfate particles are fully broken and dispersed by the instantaneous shearing action of the stirring structure 20, and the stirring and mixing are sufficient, so that the whole kettle circulation effect is good, the generated lithium carbonate precipitate particles are fine and uniform, and the Na contained in the product is contained in the reactor. + 、SO4 2- The content is extremely low, and after washing and drying, it can directly reach the battery grade standard. This can reduce the subsequent lithium carbonate carbonization, pyrolysis recrystallization, filtration, and drying process, reduce energy consumption, avoid the low utilization rate of CO2 during carbonization leading to greenhouse gas emissions, and reduce the production cost of lithium carbonate, and improve product quality and yield.

[0056] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0057] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Therefore, "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0058] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0059] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A reaction device, characterized in that: include: A reaction kettle (10) having a reaction chamber (11); A stirring structure (20) is rotatably arranged in the reaction chamber (11), the stirring structure (20) comprising a stirring shaft (21), an axial flow stirring paddle (22) arranged on the stirring shaft (21), and an extrapolated stirring paddle (23) arranged on the stirring shaft (21), wherein the extrapolated stirring paddle (23) is arranged at the lower part of the stirring shaft (21); A flow guide tube (30) is arranged in the reactor (10) and sleeved on the outer periphery of the stirring structure (20), wherein the axial flow stirring paddle (22) is located in the flow guide tube (30), and the outward thrust stirring paddle (23) is located below the flow guide tube (30).

2. The reaction device according to claim 1, characterized in that: The reaction device further comprises a plurality of vertical baffles (40) arranged at intervals along the circumferential direction on the inner wall surface of the reaction kettle (10).

3. The reaction device according to claim 1, characterized in that: The outward-thrusting stirring paddle (23) comprises a plurality of outward-thrusting blades (231) arranged at intervals along the circumferential direction of the stirring shaft (21); in the direction from the inside to the outside of the stirring shaft (21), the outward-thrusting blades (231) extend in a direction away from the rotation direction of the stirring structure (20).

4. The reaction device according to claim 3, characterized in that: The cross section of the extrapolated blade (231) satisfies the logarithmic spiral formula; and / or, The outward thrust stirring paddle (23) further comprises a sleeve portion (232) and a connecting ring (233), wherein the sleeve portion (232) is sleeved on the lower end of the stirring shaft (21), the inner ends of the plurality of outward thrust blades (231) are connected to the sleeve portion (232), and the connecting ring (233) is connected to the outer ends of the plurality of outward thrust blades (231).

5. The reaction device according to any one of claims 1 to 4, characterized in that: The reaction device further comprises a feed pipe (50) extending into the reaction chamber (11), wherein the feed pipe (50) has a first discharge port (51), and the first discharge port (51) is located outside the outwardly pushed stirring paddle (23).

6. The reaction device according to claim 5, characterized in that: The feed pipe (50) comprises a vertical pipe section (52) and an inclined pipe section (53), the upper end of the inclined pipe section (53) is connected to the lower end of the vertical pipe section (52), the first discharge port (51) is formed at the lower end of the inclined pipe section (53), and the inclined pipe section (53) extends inward from top to bottom; and / or, the reaction device comprises a plurality of the feed pipes (50), and the plurality of the feed pipes (50) are arranged at intervals in the circumferential direction of the reaction kettle (10).

7. The reaction device according to claim 5, characterized in that: The feed pipe (50) comprises a vertical pipe section (52) and an inclined pipe section (53), the upper end of the inclined pipe section (53) is connected to the lower end of the vertical pipe section (52), the first discharge port (51) is formed at the lower end of the inclined pipe section (53), and in the direction from the upper end to the lower end of the inclined pipe section (53), the inclined pipe section (53) extends inwardly and the cross-sectional size of the inclined pipe section (53) gradually decreases.

8. The reaction device according to any one of claims 1 to 4, characterized in that: The top of the reactor (10) is provided with a feed inlet (12); and / or, The guide tube (30) comprises a contraction section (31) and a straight tube section (32) connected to the lower end of the contraction section (31); in a direction from top to bottom, the transverse dimension of the contraction section (31) gradually decreases.

9. The reaction device according to any one of claims 1 to 4, characterized in that: The bottom of the reaction kettle (10) is provided with a second discharge port (13), and the reaction device further comprises a filter cover (60) located in the reaction chamber (11) and covering the second discharge port (13).

10. The reaction device according to any one of claims 1 to 4, characterized in that: The reaction device further comprises a heating structure (70) arranged outside the reaction kettle (10), the heating structure (70) comprising a heat-insulating sleeve (71) sleeved around the outer periphery of the reaction kettle (10) and a steam inlet (72) and a condensation outlet (73) arranged on the heat-insulating sleeve (71), and a heating space (74) is formed between the heat-insulating sleeve (71) and the reaction kettle (10).

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