Reaction kettle

Abstract

The utility model relates to a reaction kettle which comprises a kettle body provided with a stirring cavity, a discharge port and a feed port; the stirring device is arranged in the stirring cavity and is positioned between the discharging hole and the feeding hole; wherein the stirring device comprises a shaft part and a plurality of stirring parts, the first end of the shaft part rotatably penetrates out of the kettle body, and the plurality of stirring parts are sequentially arranged in the axial direction of the shaft part; and the grinding device is connected with the stirring cavity and is arranged close to the discharge port. The stirring device is used for stirring the materials, and the grinding device is used for grinding the materials in the coating granulation stage, so that the coating effect of the materials can be ensured, the problem that the materials are crushed after low-temperature shaping, and a coating layer is damaged can be avoided, and the purposes of simplifying the process, saving the cost, improving the efficiency and improving the quality are achieved.

Description

Technical Field

[0001] The present application relates to the technical field of production and application of negative electrode material granulation, and in particular to a reaction kettle. Background Art

[0002] In the related art, the granulation process of negative electrode materials usually adopts an intermittent furnace process. During the granulation process, the granulation equipment and the material will heat up and cool down together, consuming a large amount of electricity, increasing the cost of granulation. In addition, the intermittent furnace process is discontinuous production, which brings about problems such as low production capacity, quality fluctuations, high power consumption, and harsh operating environment, which is not conducive to large-scale production.

[0003] Therefore, some production lines use continuous reactors to achieve granulation, which heats the negative electrode material at high temperature to release impurities, and stirs the material to achieve coating and granulation. However, in the application of continuous reactors, the material is not stirred sufficiently, the uniformity is poor, and it is easy to agglomerate, which cannot improve the mixing effect of the negative electrode material and affects the efficiency of processing. If secondary crushing is performed to reduce agglomeration, the coating layer will be destroyed, and an additional process will be added, increasing the production cost. Utility Model Content

[0004] The present application provides a reaction kettle that can achieve sufficient stirring and grind the pellets during the coating and granulation stage to avoid secondary damage, thereby achieving the purpose of saving costs, improving efficiency and enhancing quality.

[0005] The present application provides a reaction kettle, comprising: a kettle body, having a stirring cavity, the kettle body being provided with a discharge port and a feed port; a stirring device, arranged in the stirring cavity and located between the discharge port and the feed port; wherein the stirring device comprises a shaft and a plurality of stirring parts, the first end of the shaft can rotatably pass through the kettle body, and the plurality of stirring parts are arranged in sequence along the axial direction of the shaft; and a grinding device, connected to the stirring cavity and arranged close to the discharge port.

[0006] In a possible implementation, the stirring portion includes a stirring rod and a stirring guide plate, and the stirring guide plate is fixedly connected to the shaft portion through the stirring rod; wherein the angle between the stirring guide plate and the bevel angle of the kettle body is 45°-75°, and the stirring guide plate is 30°-60° with the axial direction of the kettle body.

[0007] In a possible implementation, the grinding device includes grinding balls, an isolation screen and a filter screen, wherein the isolation screen and the filter screen are respectively fixedly connected to the stirring cavity; the grinding balls are located between the isolation screen and the filter screen, and when the kettle body rotates, the grinding balls are configured to perform a cascading motion; wherein the shaft portion can rotatably pass through the isolation screen and the filter screen.

[0008] In a possible implementation, the inner diameter of the mesh holes of the isolation screen is 45 mm-55 mm, the inner diameter of the mesh holes of the filter screen is 5 mm-15 mm; and the outer diameter of the grinding balls is 70 mm-90 mm.

[0009] In a possible implementation, a back-blowing device is included, the back-blowing device is mounted to the shaft portion, and the back-blowing device is configured to supply air to the grinding device; wherein the kettle body is provided with an air inlet portion connected to the back-blowing device.

[0010] In a possible implementation, the back-blowing device includes a back-blowing propeller and a blowing unit; the back-blowing propeller is sleeved on the shaft portion and arranged close to the discharge port, one end of the blowing unit is arranged in the shaft portion and connected to the air inlet portion, and the other end of the blowing unit is arranged on the back-blowing propeller.

[0011] In a possible implementation, the blowing unit includes multiple ventilation pipes and multiple groups of nozzles, and the nozzles are installed to the back-blowing propeller; one end of the ventilation pipe extends into the shaft portion and is connected to the air inlet portion, and the other end of the ventilation pipe extends into the back-blowing propeller and is connected to the corresponding nozzle.

[0012] In one possible implementation, the back-blowing propeller includes at least one spiral wing; the spiral wing has a accommodating cavity and a plurality of first through holes connected to the accommodating cavity, and the other end of the ventilation duct extends into the accommodating cavity and is connected to the corresponding nozzle through the first through holes.

[0013] In a possible implementation, it includes a sealing structure installed to the stirring cavity, the sealing structure is rotatably connected to the shaft portion; the back-blowing device is sealed and connected to the air inlet portion through the sealing structure; wherein the sealing structure has a gas cavity, and the gas cavity is respectively connected to the air inlet portion and the ventilation duct.

[0014] In a possible implementation, the sealing structure includes a sealing portion and a sealing shaft, and the gas cavity is formed in the sealing portion; the sealing portion is connected to the kettle body, and the sealing portion is rotatably connected to the shaft portion through the sealing shaft; wherein the circumferential side wall of the sealing shaft is provided with a plurality of second through holes, and the ventilation duct is connected to the gas cavity through the corresponding second through holes.

[0015] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0016] The reactor provided in the embodiment of the present application stirs the material by means of a stirring device, and in the coating and granulation stage, the material is ground by means of a grinding device, which can not only ensure the coating effect of the material, but also avoid the problem of crushing the material after low-temperature shaping, thereby destroying the coating layer, thereby achieving the purpose of simplifying the process, saving costs, improving efficiency and enhancing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0019] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0020] Figure 1 A schematic diagram of the structure of a reactor provided in an embodiment of the present application;

[0021] Figure 2 A schematic cross-sectional view of a reactor provided in an embodiment of the present application;

[0022] Figure 3 A schematic diagram of the structure of a stirring device provided in an embodiment of the present application;

[0023] Figure 4 A schematic diagram of the structure of the shaft portion provided in an embodiment of the present application;

[0024] Figure 5 A schematic diagram of the structure of a grinding device provided in an embodiment of the present application;

[0025] Figure 6 A schematic diagram of the structure of a backflush device provided in an embodiment of the present application;

[0026] Figure 7 A schematic diagram of the structure of the in-line nozzle provided in the embodiment of the present application;

[0027] Figure 8 A schematic diagram of the structure of a first offset nozzle provided in an embodiment of the present application;

[0028] Fig. 9 A schematic diagram of the structure of a second offset nozzle provided in an embodiment of the present application;

[0029] Fig.10 A schematic structural diagram of a half cross section of a sealing structure provided in an embodiment of the present application.

[0030] Description of reference numerals:

[0031] 1. kettle body; 11. first part; 111. feed chamber; 112. feed port; 113. gas outlet; 114. gas inlet; 1141. gas inlet pipe; 1142. second through hole; 12. second part; 121. stirring cavity; 13. third part; 131. discharge port;

[0032] 2. stirring device; 21. shaft; 211. first shaft; 212. second shaft; 2121. first through hole; 213. second flange; 214. third shaft; 215. third flange; 22. stirring part; 221. stirring rod; 2211. first flange; 222. stirring guide plate;

[0033] 3. Grinding device; 31. Grinding balls; 32. Isolation screen; 33. Filter screen; 34. Reinforcement ribs;

[0034] 4. back-blowing device; 41. back-blowing propeller; 411. propeller wing; 412. accommodating chamber; 413. first through hole; 42. blowing unit; 421. ventilation duct; 422. nozzle; 4221. in-line nozzle; 42211. connecting pipe; 42212. nozzle; 4222. first offset nozzle; 4223. second offset nozzle;

[0035] 5. Sealing structure; 51. Sealing part; 511. First sealing cover; 512. Second sealing cover; 513. Gas cavity; 514. Lug; 515. Sealing gas ring; 52. Sealing shaft; 521. Second through hole. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. 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 this application.

[0037] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0038] For ease of description, spatial relative terms may be used herein to describe the relative positional relationship or movement of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", "front", "back", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure undergoes a position flip or a posture change or a motion state change, then these directional indications also change accordingly, for example: an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative descriptors used herein are interpreted accordingly.

[0039] In order to solve the technical problems in the related art that the materials are not sufficiently stirred, the uniformity is poor, they are easy to agglomerate, the mixing effect of the negative electrode materials cannot be improved, and the efficiency during processing is affected, the present application provides a reactor, which stirs the materials by a stirring device, and in the coating and granulation stage, the materials are ground by a grinding device, which can not only ensure the coating effect of the materials, but also avoid the problem of crushing them after low-temperature shaping, thereby destroying the coating layer, thereby achieving the purpose of simplifying the process, saving costs, improving efficiency and improving quality.

[0040] In some exemplary embodiments, Figure 1 , Figure 2As shown, a reactor is a continuous reactor, which heats the negative electrode material at high temperature to achieve coating and granulation. The reactor includes a reactor body 1, a stirring device 2 and a grinding device 3.

[0041] The kettle body 1 is connected to an external first driving mechanism to drive the kettle body 1 to rotate. The first driving mechanism is, for example, a driving motor. The kettle body 1 has a stirring cavity 121 , and the kettle body 1 is provided with a discharge port 131 and a feed port 112 .

[0042] Exemplarily, the kettle body 1 includes a first part 11, a second part 12 and a third part 13 which are connected in sequence. The first part 11 is provided with a feed chamber 111, and a feed port 112 is provided in the first part 11, specifically, on the side wall in the axial direction of the first part 11, to ensure that the material can enter the feed chamber 111 and accumulate, and will not fall out from the feed port 112.

[0043] The stirring cavity 121 is provided in the second part 12, mainly for stirring and coating the material. The third part 13 is used to place the granulated material, and the discharge port 131 is provided on the radial side wall of the third part 13 to facilitate the smooth discharge of the granulated material.

[0044] Among them, the volume of the second part 12 can be larger than the volume of the first part 11 or the third part 13, so as to provide sufficient stirring space for the material, while feeding and discharging do not require a particularly large space. Therefore, the volume of the first part 11 or the third part 13 can be appropriately reduced.

[0045] Here, it should be noted that when the material is granulated, high temperature will produce reaction gas or steam, etc., and the first part 11 can be provided with a gas outlet 113 for exhaust to avoid internal pressure increase due to high temperature and potential safety hazards.

[0046] In this embodiment, if Figure 2-Figure 4 As shown, the stirring device 2 is arranged in the stirring cavity 121 and is located between the feed port 112 and the discharge port 131, so as to stir the material and complete the coating granulation. The stirring device 2 includes a shaft 21 and a plurality of stirring parts 22. The first end of the shaft 21 can rotatably pass through the axial side wall of the kettle body 1 and is connected to an external second driving mechanism. The second driving mechanism is, for example, a driving motor, so as to drive the shaft 21 to rotate. The shaft 21 can rotate forward or reverse.

[0047] Here, it should be noted that the above-mentioned second driving mechanism and the first driving mechanism are independent of each other. The first driving mechanism is used to drive the kettle body 1 to rotate, and the second driving mechanism is used to drive the shaft 21 to rotate. The rotation direction and rotation speed of the kettle body 1 can be the same as or different from the rotation direction and rotation speed of the shaft 21. Different rotation directions and rotation speeds can improve the stirring effect. The specific rotation direction and rotation speed shall be subject to actual conditions.

[0048] The plurality of stirring parts 22 are sequentially arranged along the axial direction of the shaft 21, ensuring that different positions in the stirring cavity 121 are provided with stirring parts 22, so as to achieve full stirring of the material. The shaft 21 located in the same cross section may also be provided with a plurality of stirring parts 22, such as four stirring parts evenly distributed along the circumferential side wall of the shaft 21, so as to ensure full stirring of the material, and achieve coating and granulation of the material.

[0049] In some examples, the stirring portion 22 includes a stirring rod 221 and a stirring guide plate 222, and the stirring guide plate 222 is fixedly connected to the shaft portion 21 through the stirring rod 221 to improve the reliability of the connection. The shaft portion 21 may be provided with a first flange 2211 to connect the shaft portion 21 and the stirring rod 221 together.

[0050] The stirring guide plate 222 is, for example, plate-shaped, and the angle between the stirring guide plate 222 and the chamfered angle of the kettle body 1 can be, for example, 45°-75°, specifically 60°. When the stirring guide plate 222 performs the stirring action, the material is picked up from the bottom of the stirring cavity 121, thereby increasing the stirring effect of the material. The stirring guide plate 222 is 30°-60° with the axis direction of the kettle body 1, specifically 45°, which plays the role of guiding the material.

[0051] The shaft 21 can rotate forward or reverse. When the shaft 21 rotates forward, the material is backflowed to the front end by the stirring guide plate 222, which prolongs the granulation time of the material and improves the granulation effect of the material. The material can be continuously fed through the feed port 112 to push the material to the discharge port 131. When the shaft 21 is reversed, the stirring guide plate 222 can push the material to move to the rear end, so that when production is stopped, the material stored in the kettle body 1 can be emptied.

[0052] For example, the material is a negative electrode material. During the heating and rotating process, the stirring device 2 is used to increase the stirring effect of the negative electrode material, improve the coating effect of the negative electrode material, obtain a high-end negative electrode material for lithium-ion batteries, and at the same time improve the tap density of the negative electrode material.

[0053] In this embodiment, if Figure 2-Figure 5As shown, the grinding device 3 is connected to the stirring cavity 121, and is located between the feed port 112 and the discharge port 131 and close to the discharge port 131. After the material is fully stirred by the stirring part 22, it is pushed to the grinding device 3 by the stirring part 22, and is ground and crushed by the grinding device 3 to reduce agglomeration. Moreover, the grinding is carried out simultaneously with the coating granulation process, which will not damage the coating layer, and there is no additional process, thereby reducing the production cost. After the grinding is completed, the stirring part 22 continues to push it to the third part 13 until it is discharged through the discharge port 131.

[0054] In some examples, the grinding device 3 includes grinding balls 31 , an isolation screen 32 and a filter screen 33 , and the isolation screen 32 and the filter screen 33 are respectively fixedly connected to the stirring cavity 121 so as to rotate synchronously with the kettle body 1 .

[0055] The grinding balls 31 are located between the isolation screen 32 and the filter screen 33. When the kettle body 1 rotates, the grinding balls 31 are set to perform a cascading motion to grind or crush the material to avoid material agglomeration. The outer diameter of the grinding balls 31 is 70mm-90mm, and specifically, it can be an 80mm stainless steel iron ball, so that it has sufficient crushing and grinding capacity, is not easy to be damaged, and has a long service life.

[0056] Here, it should be noted that the present application does not limit the number of grinding balls 31, and the number of grinding balls 31 can be 10, 20 or other numbers, etc., depending on the actual situation. The grinding balls 31 prevent the material from agglomerating by rolling, and use grinding to shape the material, change the morphology of the material, and grind the edges and corners of the material smooth.

[0057] The isolation screen 32 and the filter screen 33 can be welded to the inner wall of the stirring cavity 121, so that the connection between the isolation screen 32 and the filter screen 33 and the stirring cavity 121 is more reliable. The isolation screen 32 is used to isolate the space on both sides. One side of the isolation screen 32 is the stirring space, and the material is fully stirred. As the material is continuously added, it is pushed onto the isolation screen 32, and is screened through the isolation screen 32 to enter the other side, that is, the grinding space between the isolation screen 32 and the filter screen 33, and is ground and rolled by the grinding balls 31 to avoid agglomeration.

[0058] Among them, the inner diameter size of the sieve hole of the isolation screen 32 is 45mm-55mm, specifically 50mm, for initial screening of materials, isolating large-sized materials to one side, and continuing to stir, and materials that meet the size enter the grinding space and roll through the grinding balls 31 to achieve the grinding effect.

[0059] The inner diameter of the sieve hole of the filter screen 33 is 5mm-15mm, specifically 10mm, for example, to perform secondary screening to filter out agglomerated materials to ensure that the size of the discharged materials meets the requirements.

[0060] It should be noted that the shaft 21 can rotatably pass through the isolation screen 32 and the filter screen 33 to avoid interference between the shaft 21 and the isolation screen 32 and the filter screen 33, thereby affecting the rotation. In addition, multiple reinforcing ribs 34 can be provided on the isolation screen 32 and the filter screen 33 to enhance the structural strength of the isolation screen 32 and the filter screen 33 and extend the service life.

[0061] During the coating and granulation stage, a grinding device 3 is added, and the grinding balls 31 grind the material, which not only ensures the coating effect, but also avoids the breakage of the coating layer by pulverizing after low-temperature shaping, thereby achieving the purpose of simplifying the process, saving costs, improving efficiency and enhancing quality.

[0062] Here, it should be noted that when the material enters the grinding space between the isolation screen 32 and the filter screen 33 and the agglomerated material is crushed and ground, a small amount of material will be rotated to the side of the isolation screen 32 away from the filter screen 33. At this time, the material can be continuously stirred by the stirring guide plate 222, and the damaged material can be repaired and coated, further extending the granulation time. Then the material is pushed to the grinding space between the isolation screen 32 and the filter screen 33, and polished again to repair the morphology of the material and make it smooth, thereby improving the quality of the material. In addition, some stirring guide plates 222 are also set in the grinding space, which can also continuously stir the material. When grinding the edges and corners of the material, the grinding balls 31 and the stirring guide plates 222 work together to achieve the effect of grinding and coating at the same time, avoiding the damage of the coating layer by grinding, and further improving the coating effect and the quality of the material.

[0063] In some exemplary embodiments, Figure 2-Figure 9 As shown, the reactor includes a back-blowing device 4, which is mounted on the shaft 21. The back-blowing device 4 is configured to supply air to the grinding device 3 to purge and clean the filter screen 33 to prevent the mesh from being blocked by materials.

[0064] The kettle body 1 is provided with an air inlet 114 connected with the backflush device 4, and the air inlet 114 is provided on the first portion 11. The air inlet 114 is provided on the axial side wall of the kettle body 1, for example, to ensure that the gas is transferred along a linear direction.

[0065] In this embodiment, if Figure 2-Figure 9 As shown, the back-blowing device 4 includes a back-blowing propeller 41 and a blowing unit 42. The back-blowing propeller 41 is sleeved on the shaft portion 21. One end of the blowing unit 42 extends into the shaft portion 21 and is connected to the air inlet portion 114. The other end of the blowing unit 42 extends to the back-blowing propeller 41 and supplies air toward the filter screen 33.

[0066] In order to improve the stability of the back-blowing propeller 41 during installation, the shaft portion 21 includes, for example, a first shaft body 211 and a second shaft body 212. The stirring portion 22 is mounted to the first shaft body 211, and the first shaft body 211 and the second shaft body 212 are connected together via a second flange 213. The back-blowing propeller 41 is sleeved on the second shaft body 212 to support the back-blowing propeller 41.

[0067] The back-blowing device 4 is located between the isolation screen 32 and the filter screen 33 and is close to the filter screen 33 to blow air to the filter screen 33 to achieve cleaning.

[0068] In order to avoid interference between the filter screen 33 and the back-blowing propeller 41, the shaft portion 21 further includes a third shaft body 214, which is connected to the second shaft body 212 via a third flange 215, and the filter screen 33 is arranged on the radial outer side of the third shaft body 214. The filter screen 33 and the third shaft body 214 are connected with a gap so that they can rotate separately without interfering with each other.

[0069] In this embodiment, if Figure 2-Figure 9 As shown, the blowing unit 42 includes a plurality of ventilation pipes 421 and a plurality of nozzles 422 , and the nozzles 422 are mounted to the back-blowing propellers 41 .

[0070] For example, the number of ventilation ducts 421 can be 1, 2, or 3, etc., which shall be subject to actual conditions. The ventilation ducts 421 in this application are explained as 9 in number, and the numbers of other components described later are set with reference to the number of ventilation ducts 421, and do not constitute a limitation to this application. If the number of ventilation ducts 421 changes, the other components described later will also change accordingly.

[0071] The hollow tubular structure of the shaft portion 21 allows one end of the ventilation pipe 421 to extend into the first shaft body 211 of the shaft portion 21 and communicate with the air intake portion 114, and the other end of the ventilation pipe 421 extends into the second shaft body 212. The radial inner wall of the second shaft body 212 is provided with a plurality of first through holes 2121. The other end of the ventilation pipe 421 passes through the first through hole 2121 to the back-blowing propeller 41 and communicates with the corresponding nozzle 422.

[0072] In this embodiment, if Figure 2-Figure 9 As shown, the back-blowing propeller 41 includes a spiral wing 411 . The spiral wing 411 may be one or two. The present application takes three spiral wings 411 as an example for further explanation. The three spiral wings 411 are evenly distributed along the circumference of the second shaft body 212 .

[0073] Each spiral wing 411 has a receiving cavity 412 and a first through hole 413 communicating with the receiving cavity 412. The other end of the ventilation pipe 421 passes through the first through hole 2121 and enters the receiving cavity 412, and is installed in the first through hole 413, and communicates with the corresponding nozzle 422 through the first through hole 413. Three ventilation pipes 421 can be provided in each spiral wing 411, and the number of the first through holes 413 needs to refer to the number of the nozzles 422 to ensure that each nozzle 422 can spray gas.

[0074] In some examples, the nozzle 422 includes, for example, an in-line nozzle 4221, a first offset nozzle 4222, and a second offset nozzle 4223. The in-line nozzle 4221 is located on the center line of the spiral wing 411 and is coaxially arranged with one of the ventilation pipes 421. The three ventilation pipes 421 are arranged in parallel, and the ventilation pipes 421 located on both sides are eccentrically arranged and are respectively connected to the first offset nozzle 4222 and the second offset nozzle 4223.

[0075] Here, it should be noted that the number of in-line nozzles 4221 can be multiple to enhance the blowing capacity. Each in-line nozzle 4221 is, for example but not limited to, set as a four-nozzle form, and the gas outlet position is set to be divided into four, so as to increase the back-blowing area of ​​the gas and improve the back-blowing effect. Exemplarily, the in-line nozzle 4221 includes a connecting pipe 42211 and four nozzles 42212, the connecting pipe 42211 is hollow and communicates with the four nozzles 42212, the connecting pipe 42211 is fixedly connected to the four nozzles 42212, and the connecting pipe 42211 is threadedly connected to the spiral wing 411.

[0076] The number of the first offset nozzle 4222 and the second offset nozzle 4223 may also be multiple, and their arrangement is the same or similar to the arrangement of the above-mentioned in-line nozzle 4221, and will not be repeated here.

[0077] In this embodiment, if Figure 6 As shown, the gas introduced into the ventilation pipe 421 can be nitrogen, for example, which can protect the material. Nitrogen does not contain oxygen and water vapor, which can prevent the material from oxidation or hydrolysis, thereby reducing the impact on the material. Nitrogen can provide a stable and safe reaction environment.

[0078] In some exemplary embodiments, Figure 2-Figure 10 As shown, the reactor includes a sealing structure 5 installed in the stirring cavity 121, and the sealing structure 5 is rotatably connected to the first shaft body 211 of the shaft portion 21 to seal the gas to prevent gas leakage and affect ventilation or air supply.

[0079] The backflush device 4 is sealed and connected to the air inlet portion 114 through a sealing structure 5. The air inlet portion 114 includes, for example, an air inlet pipe 1141 and a second through hole 1142. The second through hole 1142 is provided on the axial side wall of the kettle body 1. One end of the air inlet pipe 1141 is installed in the second through hole 1142, and the other end of the air inlet pipe 1141 is connected to an external nitrogen delivery mechanism.

[0080] The sealing structure 5 has a gas cavity 513, which is respectively connected to the air inlet 114 and the ventilation pipe 421, so as to achieve the patency of the gas channel and ensure the normal transportation of the gas.

[0081] In this embodiment, if Figure 2-Figure 10 As shown, the sealing structure 5 includes a sealing portion 51 and a sealing shaft 52 , and a gas cavity 513 is formed in the sealing portion 51 .

[0082] The sealing part 51 is connected to the kettle body 1 . The sealing part 51 is connected to the kettle body 1 by screws or bolts, for example, to achieve a detachable connection, so as to facilitate replacement or maintenance of internal components.

[0083] In some examples, the sealing portion 51 includes a first sealing cover 511 and a second sealing cover 512 , the first sealing cover 511 has a first concave cavity, the second sealing cover 512 has a second concave cavity, and the first sealing cover 511 and the second sealing cover 512 are connected to each other so that the first concave cavity and the second concave cavity together constitute a gas cavity 513 .

[0084] Lugs 514 are provided on the first sealing cover 511 and the second sealing cover 512. Screws or bolts pass through the lugs 514 of the first sealing cover 511 and the second sealing cover 512 in sequence, so that the first sealing cover 511 and the second sealing cover 512 are connected together. In order to improve the airtightness of the gas cavity 513, a sealing gas ring 515 is further provided between the first sealing cover 511 and the second sealing cover 512. The sealing gas ring 515 is, for example, a rubber ring.

[0085] The sealing shaft 52 is press-fitted on the shaft 21, and the sealing part 51 is sleeved on the sealing shaft 52 and is rotatably connected with the sealing shaft 52. In order to improve the sealing performance and prevent gas leakage, an O-ring is arranged between the sealing part 51 and the sealing shaft 52. The number of O-rings depends on the actual situation, and can be 2, 3 or 4, etc., and is evenly distributed along the axial direction of the sealing structure 5.

[0086] The circumferential side wall of the sealing shaft 52 is provided with a plurality of second through holes 521, and the ventilation pipe 421 is connected with the gas cavity 513 through the corresponding second through holes 521. O-rings may be provided on both sides of the second through holes 521 to ensure airtightness.

[0087] The number of the second through holes 521 is consistent with the number of the ventilation pipes 421 , and specifically refers to the number of the ventilation pipes 421 . Nitrogen enters the gas cavity 513 through the air inlet 114 , and branches from the second through holes 521 into the ventilation pipes 421 .

[0088] The reactor proposed in this application has two angles for its stirring guide plate. The first is that there is an angle between the stirring guide plate and the reactor body, so that the material is picked up from the bottom during stirring, which increases the stirring effect of the material. The second is that there is an angle between the stirring guide plate and the axis of the reactor body, which plays a role in guiding the material. When rotating forward, the material flows back to the front end, prolonging the granulation time of the material and improving the granulation effect of the material. When reversing, the material moves to the rear end, which is used to empty the accumulated material inside the reactor body when production is stopped.

[0089] A backflush device and a sealing structure are provided to cooperate with the grinding device to avoid blockage. The grinding balls in the grinding device rotate with the kettle body to perform a cascading motion to grind the granulated materials to avoid agglomeration of the materials.

[0090] The continuous reactor saves a lot of electric energy in the granulation process and reduces the production cost of the granulation process.

[0091] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0092] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0093] The foregoing is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A reactor, characterized in that: include: A kettle body having a stirring cavity, wherein the kettle body is provided with a discharge port and a feed port; A stirring device is disposed in the stirring cavity and is located between the discharge port and the feed port; wherein the stirring device comprises a shaft portion and a plurality of stirring portions, a first end of the shaft portion is rotatably passed through the kettle body, and the plurality of stirring portions are sequentially arranged along the axial direction of the shaft portion; and The grinding device is connected to the stirring cavity and is arranged close to the discharge port.

2. The reactor according to claim 1, characterized in that: The stirring portion comprises a stirring rod and a stirring guide plate, and the stirring guide plate is fixedly connected to the shaft portion through the stirring rod; The included angle between the stirring guide plate and the bevel angle of the kettle body is 45°-75°, and the axial direction of the stirring guide plate and the kettle body is 30°-60°.

3. The reactor according to claim 1, characterized in that: The grinding device comprises grinding balls, an isolation screen and a filter screen, wherein the isolation screen and the filter screen are respectively fixedly connected to the stirring cavity; The grinding balls are located between the isolation screen and the filter screen, and when the kettle body rotates, the grinding balls are configured to perform a cascading motion; Wherein, the shaft portion can rotatably pass through the isolation screen and the filter screen.

4. The reactor according to claim 3, characterized in that: The inner diameter of the mesh holes of the isolation screen is 45mm-55mm, the inner diameter of the mesh holes of the filter screen is 5mm-15mm; the outer diameter of the grinding ball is 70mm-90mm.

5. The reactor according to claim 1, characterized in that: comprising a back-blowing device mounted to the shaft portion, the back-blowing device being configured to supply air to the grinding device; Wherein, the kettle body is provided with an air inlet portion connected with the back-blowing device.

6. The reactor according to claim 5, characterized in that: The back-blowing device comprises a back-blowing propeller and a blowing unit; The back-blowing propeller is sleeved on the shaft and arranged close to the discharge port. One end of the blowing unit is arranged in the shaft and communicated with the air inlet. The other end of the blowing unit is arranged on the back-blowing propeller.

7. The reactor according to claim 6, characterized in that: The blowing unit includes a plurality of ventilation pipes and a plurality of nozzles, and the nozzles are mounted to the back-blowing propeller; One end of the ventilation duct extends into the shaft portion and is communicated with the air inlet portion, and the other end of the ventilation duct extends into the back-blowing propeller and is communicated with the corresponding nozzle.

8. The reactor according to claim 7, characterized in that: The blowback propeller includes at least one propeller wing; The spiral wing has a receiving cavity and a plurality of first through holes communicating with the receiving cavity. The other end of the ventilation pipe extends into the receiving cavity and communicates with the corresponding nozzle through the first through holes.

9. The reactor according to claim 7, characterized in that: comprising a sealing structure mounted to the stirring cavity, the sealing structure being rotatably connected to the shaft portion; The backflush device is sealed and connected to the air inlet portion via the sealing structure; Wherein, the sealing structure has a gas cavity, and the gas cavity is communicated with the air inlet and the ventilation duct respectively.

10. The reactor according to claim 9, characterized in that: The sealing structure comprises a sealing portion and a sealing shaft, and the gas cavity is formed in the sealing portion; The sealing part is connected to the kettle body, and the sealing part is rotatably connected to the shaft part through the sealing shaft; Wherein, a plurality of second through holes are provided on the circumferential side wall of the sealing shaft, and the ventilation duct is connected with the gas cavity through the corresponding second through holes.

Images