Mixing device and reaction system with same

Abstract

The utility model provides a material mixing device and a reaction system with the same, the material mixing device comprises: a material mixing cylinder which extends along the transverse direction and is rotatably arranged, the material mixing cylinder is provided with a material mixing cavity, and the material mixing cavity is provided with an inlet and an outlet; the material distributing part is arranged at the outlet and communicated with the material mixing cavity, so that the material distributing part is provided with a first material outlet and a second material outlet, and the first mixed material can be discharged from the first material outlet; the first feeding part comprises a material returning structure and a raw material conveying structure, the first end of the material returning structure corresponds to the second discharging port, the second end of the material returning structure corresponds to the inlet, the material returning structure is used for conveying a second mixed material discharged from the second discharging port to the inlet, and the raw material conveying structure can convey a first raw material to the inlet; and the second feeding part can convey a second raw material to the inlet. According to the technical scheme, the problem that black powder and acidic materials are not uniformly mixed in the prior art can be effectively solved.

Description

Technical Field

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

[0002] As my country pays more and more attention to reducing carbon emissions, the number of new energy vehicles has increased rapidly. As the core of new energy vehicles, power batteries also increase rapidly in number. The service life of power batteries in new energy vehicles is generally about 8 years, so some power batteries are facing the situation of "scrap". How to properly deal with waste power batteries and how to recycle waste power batteries safely and environmentally friendly have become issues of common concern to industry insiders.

[0003] Generally speaking, acidification roasting lithium extraction technology is a method of extracting lithium from waste power batteries. This technology mainly reacts the black powder formed by waste power batteries with a high lithium content with an acidic substance (such as sulfuric acid) to convert lithium into water-soluble lithium salts, and then extracts and separates lithium. In the related art, the black powder and the acidic substance are mixed in the mixing chamber and then directly enter the reaction kiln for reaction. In this way, there may be an uneven mixing of the black powder and the acidic substance, which leads to a low lithium extraction rate. Therefore, there is a problem of uneven mixing of black powder and acidic substances in the related field. Utility Model Content

[0004] The main purpose of the utility model is to provide a mixing device and a reaction system having the same, so as to solve the problem of uneven mixing of black powder and acidic substances in the related art.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a mixing device is provided, comprising: a mixing barrel, extending in the transverse direction and rotatably arranged, the mixing barrel having a mixing chamber, the mixing chamber having an inlet and an outlet; a material dividing part, arranged at the outlet and connected with the mixing chamber, so that the material dividing part has a first outlet and a second outlet, and a first mixed material can be discharged from the first outlet; a first feeding part, comprising a return structure and a raw material conveying structure, the first end of the return structure is arranged corresponding to the second outlet, the second end of the return structure is arranged corresponding to the inlet, the return structure is used to convey the second mixed material discharged from the second outlet to the inlet, and the raw material conveying structure can convey the first raw material to the inlet; the second feeding part can convey the second raw material to the inlet.

[0006] Furthermore, the material dividing part includes a material dividing section, a first discharging section, a second discharging section and a material dividing plate located in the material dividing section. The upper end of the material dividing section is connected to the outlet, the lower end of the material dividing section is connected to the upper end of the first discharging section and the upper end of the second discharging section, the lower end of the first discharging section forms a first discharging port, the lower end of the second discharging section forms a second discharging port, and one end of the material dividing plate is connected to the junction of the first discharging section and the second discharging section.

[0007] Furthermore, the dividing plate can be rotatably arranged in the dividing section and has multiple dividing positions. The dividing part also includes a plurality of pin holes arranged on the side wall of the dividing part and latches inserted in the pin holes. The plurality of pin holes are arranged one-to-one correspondingly to the plurality of dividing positions. The latches cooperate with the dividing plate stopper to limit the rotation of the dividing plate.

[0008] Furthermore, the return material structure includes a main transmission section, an input section and an output section. The main transmission section is arranged on the side of the mixing barrel, the input section is arranged between the first end of the main transmission section and the second discharge port, and the output section is arranged between the second end of the main transmission section and the inlet.

[0009] Furthermore, a transmission spiral is provided on the main transmission section, and the raw material conveying structure includes a raw material input section, one end of which extends above the transmission spiral to convey the first raw material into the transmission spiral.

[0010] Furthermore, the mixing device also includes a sieve plate arranged in the mixing chamber and close to the outlet.

[0011] Furthermore, the mixing barrel is arranged at an angle, and the mixing device also includes a crushing structure which is movably arranged in the mixing chamber and can cooperate with the screen plate stopper, and the crushing structure is maintained at one end close to the outlet under the action of gravity.

[0012] Furthermore, sieve holes are arranged on the sieve plate, and the ratio of the diameter of the sieve holes to the outer diameter of the crushing structure is between 70:100 and 90:100.

[0013] According to another aspect of the utility model, a reaction system is provided, including a mixing device and a reaction kiln, the reaction kiln is connected to the first discharge port, and the mixing device is the above-mentioned mixing device.

[0014] Furthermore, the reaction kiln is a hot kiln, and the reaction system further comprises a heat transfer tube, a first end of the heat transfer tube is connected to the reaction kiln, and a second end of the heat transfer tube is connected to the mixing barrel and is arranged close to the inlet.

[0015] By applying the technical scheme of the utility model, the raw material conveying structure conveys the first material into the mixing chamber, and the second feeding part conveys the second material into the mixing chamber. The mixing chamber is used to accommodate the first raw material and the second raw material. The mixing barrel rotates to drive the first raw material and the second raw material to mix, thereby obtaining a mixed material. The dividing part is arranged at the outlet and communicated with the mixing chamber, and the mixed material is discharged from the outlet and enters the dividing part; the dividing part can divide the mixed material into a first mixed material and a second mixed material, the first mixed material can be discharged from the first discharge port, and the second mixed material can be discharged from the second discharge port. The return structure is arranged between the second discharge port and the inlet, and the return structure can convey the second mixed material to the inlet, so that the second mixed material re-enters the mixing chamber and is mixed again with the first raw material and the second raw material. Compared with the scheme of directly discharging all the mixed materials, the mixing device of the present application re-conveys part of the mixed material to the mixing chamber for mixing again, so that the mixed material is mixed more fully, and thus the mixed material is more uniform. Therefore, the technical solution of the present application can effectively solve the problem of uneven mixing of black powder and acidic substances 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 schematic top view of an embodiment of a reaction system according to the present invention is shown;

[0018] Figure 2 Shows Figure 1 A schematic cross-sectional view of a material distribution portion of a mixing device of a reaction system;

[0019] Figure 3 Shows Figure 1 A schematic cross-sectional view of a partial structure of a mixing device of a reaction system;

[0020] Figure 4 Shows Figure 1 A schematic side view of a crushing structure of a mixing device of a reaction system;

[0021] Figure 5 Shows Figure 1 A schematic cross-sectional view of a partial structure of a mixing device of a reaction system.

[0022] The above drawings include the following reference numerals:

[0023] 10. Mixing cylinder; 11. Mixing chamber; 15. Screen plate;

[0024] 20. First feeding section; 21. Returning material structure; 211. Main transmission section; 212. Input section; 213. Output section; 22. Raw material conveying structure; 221. Raw material input section;

[0025] 30. Second feeding section;

[0026] 60. Crushing structure; 61. Rod body; 62. Crushing spiral;

[0027] 90, material distribution part; 91, first material discharging port; 92, second material discharging port; 93, material distribution section; 94, first material discharging section; 95, second material discharging section; 96, material distribution plate;

[0028] 100, reaction kiln; 110, cooling kiln; 120, first raw material warehouse; 130, second raw material warehouse. DETAILED DESCRIPTION

[0029] 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.

[0030] 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.

[0031] 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.

[0032] like Figure 1 as well as Figure 2 As shown, the present application provides a mixing device, and an embodiment of the mixing device of the present application includes: a mixing barrel 10, a dividing part 90, a first feeding part 20, and a second feeding part 30; the mixing barrel 10 extends in the transverse direction and is rotatably arranged, the mixing barrel 10 has a mixing chamber 11, and the mixing chamber 11 has an inlet and an outlet; the dividing part 90 is arranged at the outlet and is connected with the mixing chamber 11, so the dividing part 90 has a first outlet 91 and a second outlet 92, and the first mixed material can be discharged from the first outlet 91; the first feeding part 20 includes a return structure 21 and a raw material conveying structure 22, the first end of the return structure 21 is arranged corresponding to the second outlet 92, and the second end of the return structure 21 is arranged corresponding to the inlet, the return structure 21 is used to convey the second mixed material discharged from the second outlet 92 to the inlet, and the raw material conveying structure 22 can convey the first raw material to the inlet; the second feeding part 30 can convey the second raw material to the inlet.

[0033] By applying the technical solution of this embodiment, the raw material conveying structure 22 conveys the first material into the mixing chamber 11, and the second feeding part 30 conveys the second material into the mixing chamber 11. The mixing chamber 11 is used to accommodate the first raw material and the second raw material. The mixing barrel 10 rotates to drive the first raw material and the second raw material to mix, thereby obtaining a mixed material. The dividing part 90 is arranged at the outlet and is connected to the mixing chamber 11. The mixed material is discharged from the outlet and enters the dividing part 90; the dividing part 90 can divide the mixed material into the first mixed material and the second mixed material. The first mixed material is discharged from the first discharge part 10. The first raw material is discharged from the first outlet 91, and the second mixed material is discharged from the second outlet 92. The return structure 21 is arranged between the second outlet 92 and the inlet. The return structure 21 can transport the second mixed material to the inlet, so that the second mixed material re-enters the mixing chamber 11 and is mixed again with the first raw material and the second raw material. Compared with the solution of directly discharging all the mixed materials, the mixing device of this embodiment re-transports part of the mixed material to the mixing chamber 11 to be mixed again, so that the mixed material is mixed more fully, and then the mixed material is made more uniform. Therefore, the technical solution of this embodiment can effectively solve the problem of uneven mixing of black powder and acidic substances in the related art.

[0034] It should be noted that, in this embodiment, the first raw material is a solid material, specifically battery black powder, the second raw material is a liquid material, specifically an acidic substance, such as sulfuric acid, and the mixed material is a solid-liquid mixture formed by mixing battery black powder and sulfuric acid, but exists in a solid form.

[0035] Specifically, in this embodiment, the material dividing portion 90 can divide the mixed material into two parts, so that the mixed material is mixed more fully, and thus the mixed material is more uniform.

[0036] like Figure 2As shown, the material distribution part 90 includes a material distribution section 93, a first discharge section 94, a second discharge section 95 and a material distribution plate 96 located in the material distribution section 93. The upper end of the material distribution section 93 is connected to the outlet, the lower end of the material distribution section 93 is connected to the upper end of the first discharge section 94 and the upper end of the second discharge section 95. The lower end of the first discharge section 94 forms a first discharge port 91, and the lower end of the second discharge section 95 forms a second discharge port 92. One end of the material distribution plate 96 is connected to the junction of the first discharge section 94 and the second discharge section 95. Specifically, the connecting end of the dividing plate 96 is connected to the junction of the first discharging section 94 and the second discharging section 95, the free end of the dividing plate 96 is located in the dividing section 93, the side wall corresponding to the dividing section 93 and the first discharging section 94 and the free end of the dividing plate 96 form the entrance of the first discharging section 94, the side wall corresponding to the dividing section 93 and the second discharging section 95 and the free end of the dividing plate 96 form the entrance of the second discharging section 95, when the mixed material enters the dividing section 90 and passes through the dividing section 93, the mixed material is separated into the first mixed material and the second mixed material by the dividing plate 96, the first mixed material enters the first discharging section 94 from the entrance of the first discharging section 94 and is discharged from the first discharging port 91, the second mixed material enters the second discharging section 95 from the entrance of the second discharging section 95 and is discharged from the second discharging port 92. The dividing section 90 set in this way has the advantages of simple structure and easy processing.

[0037] In addition, in the present embodiment, the mixing barrel 10 includes a rotating barrel portion and an inlet end plate and an outlet end plate arranged at both ends of the rotating barrel portion, wherein the outlet end plate includes an end plate body and a nesting section arranged around the end plate body and extending perpendicularly to the direction of the end plate body, and the nesting section is nested and cooperated with the rotating barrel portion, so that when the rotating barrel portion rotates, the outlet end plate is stationary, and the distribution section 90 is arranged below the outlet end plate, and the mixed material enters the distribution section 90 from the outlet under the action of its own gravity.

[0038] In addition, in this embodiment, the dividing plate 96 is rotatably disposed in the dividing section 93 and has a plurality of dividing positions. The dividing portion 90 also includes a plurality of pin holes disposed on the side wall of the dividing portion 90 and latches inserted in the pin holes. The plurality of pin holes are disposed in one-to-one correspondence with the plurality of dividing positions. The latches cooperate with the stopper of the dividing plate 96 to limit the rotation of the dividing plate 96. Specifically, when the latch is inserted into different pin holes, the dividing plate 96 swings downward under the action of its own weight until the bottom surface of the dividing plate 96 abuts against the latch, so that the latch limits the position of the dividing plate 96, that is, through the latch in the pin holes at different positions, the angle between the dividing plate 96 and the horizontal or vertical direction can be controlled, so as to control the size of the entrance of the first discharging section 94 and the entrance of the second discharging section 95, and then control the relative amount of the first mixed material and the second mixed material in the mixed material, that is, the dividing plate 96 at different discharging positions can control the relative proportion of the first mixed material and the second mixed material, and has the advantages of simple structure and easy operation. For the pin holes without latches, plugs can be used to plug them to ensure the sealing of the mixing device.

[0039] like Figure 1 As shown, the return structure 21 includes a main transmission section 211, an input section 212 and an output section 213. The main transmission section 211 is arranged at the side of the mixing barrel 10, the input section 212 is arranged between the first end of the main transmission section 211 and the second discharge port 92, and the output section 213 is arranged between the second end of the main transmission section 211 and the inlet. Specifically, the input section 212 and the output section 213 are arranged at an angle to the main transmission section 211. Such an arrangement can fully utilize the space at the side of the mixing barrel 10, and has the advantage of reasonable layout.

[0040] In addition, in this embodiment, since the mixing barrel 10 is tilted relative to the horizontal direction, the angle between the axis of the mixing barrel 10 and the horizontal direction is between 1° and 3°. The mixing barrel 10 itself is tilted at a certain angle, so that the mixed material can move from the inlet to the outlet, which has the advantage of a simple structure; the main transmission section 211 can also be tilted relative to the horizontal direction, and in the direction from one end corresponding to the input section 212 to one end corresponding to the output section 213, the main transmission section 211 is gradually raised to transmit the material. The main transmission section 211 can be set as an integral part or as a separate part, and the return material structure 21 can be a conveying screw, a conveyor belt or a scraper, etc.

[0041] like Figure 1As shown, a transmission spiral is provided on the main transmission section 211, and the raw material conveying structure 22 includes a raw material input section 221, one end of which extends above the transmission spiral to convey the first raw material into the transmission spiral. Specifically, the first raw material is input into the transmission spiral through the raw material input section 221, so that the first raw material and the second mixed material can be pre-mixed in the transmission spiral, and then conveyed into the mixing chamber 11, so that the mixed materials are mixed more evenly.

[0042] In addition, in this embodiment, the first raw material bin 120 is used to store the first raw material, the second raw material bin 130 is used to store the second raw material, and the raw material input section 221 is disposed between the first raw material bin 120 and the transmission screw. In other embodiments not shown in the figure, the raw material input section 221 can also be directly disposed between the inlet and the first raw material bin 120 to directly transport the first raw material into the mixing chamber 11.

[0043] In addition, if Figure 5 As shown, the second feed part 30 also includes a tubular structure inserted on the inlet end plate to introduce the second raw material into the mixing chamber 11; the first feed part 20 also includes a feed screw arranged on the inlet end plate to introduce the first raw material into the mixing chamber 11.

[0044] like Figure 3 As shown, the mixing device further includes a sieve plate 15 disposed in the mixing chamber 11 and close to the outlet. Specifically, the sieve plate 15 can block the larger mixed materials in the mixing chamber 11, which can ensure that the size of the mixed materials discharged from the outlet will not be too large, and on the other hand, it can prevent the oversized mixed materials from clogging the material distribution part 90, the material return structure 21, etc., thereby causing the entire mixing device to fail to operate normally.

[0045] like Figure 3 as well as Figure 4 As shown, the mixing barrel 10 is tilted, and the mixing device further includes a crushing structure 60 that is movably arranged in the mixing chamber 11 and can cooperate with the screen plate 15 to stop. The crushing structure 60 is kept at one end close to the outlet under the action of gravity. Specifically, the screen plate 15 can cooperate with the crushing structure 60 to stop, so as to prevent the crushing structure 60 from blocking the outlet. The crushing structure 60 can crush the larger mixed material into smaller mixed materials, so that they are discharged from the outlet through the screen plate 15.

[0046] Specifically, Figure 3 as well as Figure 4 As shown, in this embodiment, the crushing structure 60 includes a rod body 61 and a crushing spiral 62 disposed on the outer surface of the rod body 61. The crushing structure 60 is used to crush and scatter the mixed material, which has the advantage of a simple structure.

[0047] In addition, in this embodiment, a sieve hole is provided on the sieve plate 15, and the ratio of the diameter of the sieve hole to the outer diameter of the crushing structure 60 is between 70:100 and 90:100. Specifically, such a configuration prevents the crushing structure 60 from passing through the sieve hole, and enables the sieve plate 15 to effectively control the size of the mixed material discharged from the outlet; since the connection of the structure forming the sieve hole on the sieve plate 15 may become loose during the long-term operation of the mixing device, and thus the size of the sieve hole may become slightly larger, the sieve hole that meets the above conditions will not cause the crushing structure 60 to pass through the sieve hole even if the size becomes slightly larger during the long-term operation.

[0048] In addition, in this embodiment, a heat-insulating layer is disposed on the outer side of the mixing barrel 10, and the heat-insulating layer can prevent the mist-like substance formed by the liquid material from condensing due to the excessively low temperature during the mixing process.

[0049] In addition, in this embodiment, the mixing barrel 10 is also provided with an observation port, which facilitates the staff to observe the mixing chamber 11 when the machine is stopped.

[0050] In this embodiment, the mixing drum 10 is a circular drum. In addition, in other embodiments, the mixing drum may also be a multi-angle drum such as a pentagonal drum or a hexagonal drum.

[0051] like Figure 1 As shown, the present application also provides a reaction system, which includes a mixing device and a reaction kiln 100, wherein the mixing device is the above-mentioned mixing device. The above-mentioned mixing device can effectively solve the problem of uneven mixing of black powder and acidic substances in the related art, and the reaction system with the above-mentioned mixing device also has the above-mentioned advantages.

[0052] In addition, if Figure 1 As shown, in this embodiment, the reaction kiln 100 is a hot kiln, and the reaction system further includes a heat transfer pipe, the first end of the heat transfer pipe is connected to the reaction kiln 100, and the second end of the heat transfer pipe is connected to the mixing barrel 10 and is arranged near the inlet. Specifically, the heat transfer pipe can introduce the waste heat generated by the reaction kiln 100 into the mixing barrel 10, so as to make full use of the waste heat of the reaction kiln 100 and achieve the purpose of energy saving. In addition, the reaction system in the embodiment also includes a cooling kiln 110 arranged downstream of the reaction kiln 100 and connected to the reaction kiln 100.

[0053] 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.

[0054] 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". Thus, the exemplary term "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.

[0055] 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.

[0056] 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 mixing device, characterized in that: include: A mixing cylinder (10) extending in a transverse direction and rotatably arranged, the mixing cylinder (10) having a mixing chamber (11), the mixing chamber (11) having an inlet and an outlet; a material distribution portion (90), arranged at the outlet and connected to the mixing chamber (11), the material distribution portion (90) having a first discharge port (91) and a second discharge port (92), and the first mixed material can be discharged from the first discharge port (91); A first feeding part (20) comprises a material return structure (21) and a raw material conveying structure (22), wherein a first end of the material return structure (21) is arranged corresponding to the second material outlet (92), and a second end of the material return structure (21) is arranged corresponding to the inlet, and the material return structure (21) is used to convey the second mixed material discharged from the second material outlet (92) to the inlet, and the raw material conveying structure (22) can convey the first raw material to the inlet; The second feeding part (30) is capable of conveying the second raw material to the inlet.

2. The mixing device according to claim 1, characterized in that: The material distribution part (90) includes a material distribution section (93), a first material discharging section (94), a second material discharging section (95) and a material distribution plate (96) located in the material distribution section (93); the upper end of the material distribution section (93) is connected to the outlet; the lower end of the material distribution section (93) is connected to the upper end of the first material discharging section (94) and the upper end of the second material discharging section (95); the lower end of the first material discharging section (94) forms the first material discharging port (91); the lower end of the second material discharging section (95) forms the second material discharging port (92); one end of the material distribution plate (96) is connected to the junction of the first material discharging section (94) and the second material discharging section (95).

3. The mixing device according to claim 2, characterized in that: The dividing plate (96) is rotatably disposed in the dividing section (93) and has a plurality of dividing positions. The dividing portion (90) also includes a plurality of pin holes disposed on the side wall of the dividing portion (90) and latches inserted in the pin holes. The plurality of pin holes are disposed in one-to-one correspondence with the plurality of dividing positions. The latches cooperate with a stopper of the dividing plate (96) to limit the rotation of the dividing plate (96).

4. The mixing device according to claim 1, characterized in that: The return material structure (21) comprises a main transmission section (211), an input section (212) and an output section (213); the main transmission section (211) is arranged on the side of the mixing barrel (10); the input section (212) is arranged between the first end of the main transmission section (211) and the second discharge port (92); and the output section (213) is arranged between the second end of the main transmission section (211) and the inlet.

5. The mixing device according to claim 4, characterized in that: The main transmission section (211) is provided with a transmission spiral, and the raw material conveying structure (22) comprises a raw material input section (221), one end of the raw material input section (221) extends above the transmission spiral to convey the first raw material into the transmission spiral.

6. The mixing device according to any one of claims 1 to 5, characterized in that: The mixing device further comprises a sieve plate (15) arranged in the mixing chamber (11) and close to the outlet.

7. The mixing device according to claim 6, characterized in that: The mixing barrel (10) is arranged at an angle, and the mixing device further comprises a crushing structure (60) which is movably arranged in the mixing chamber (11) and can cooperate with the screen plate (15) to stop, and the crushing structure (60) is maintained at one end close to the outlet under the action of gravity.

8. The mixing device according to claim 7, characterized in that: The sieve plate (15) is provided with sieve holes, and the ratio of the diameter of the sieve holes to the outer diameter of the crushing structure (60) is between 70:100 and 90:

100.

9. A reaction system, comprising a mixing device and a reaction kiln (100), wherein the reaction kiln (100) is connected to the first discharge port (91), characterized in that: The mixing device is the mixing device according to any one of claims 1 to 8.

10. The reaction system according to claim 9, characterized in that: The reaction kiln (100) is a hot kiln, and the reaction system further comprises a heat transfer pipe, wherein a first end of the heat transfer pipe is connected to the reaction kiln (100), and a second end of the heat transfer pipe is connected to the mixing barrel (10) and is arranged close to the inlet.

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