Drying and crushing device

Abstract

The utility model provides a drying and crushing device, and aims to solve the technical problems of poor crushing effect and low efficiency of the conventional drying and crushing device. The device comprises a box body; the feeding hopper is arranged at the top of the box body; a first channel and a second channel are formed by the two sides of the material guide table and the inner wall of the feeding hopper respectively; a first crushing bin, a second crushing bin and a drying cavity which is formed below the first crushing bin and the second crushing bin and communicates with the first crushing bin and the second crushing bin are arranged in the box body; crushing mechanisms are respectively arranged in the first crushing bin and the second crushing bin; wherein the first crushing bin is communicated with the first channel, the second crushing bin is communicated with the second channel, and the bottom walls of the first crushing bin and the second crushing bin are respectively provided with a plurality of filter holes. Lithium carbonate in the feeding hopper is divided into two paths to be fed into the two crushing bins to be crushed, discharging is fast, raw materials can make full contact with the crushing blades, and the crushing effect and efficiency can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium carbonate production, in particular to a lithium carbonate drying and crushing device. Background Art

[0002] Lithium carbonate is an inorganic compound. It can be used as a raw material for making ceramics, medicines, catalysts and lithium batteries, and is widely used. In the process of producing lithium carbonate, it is necessary to dry, heat and crush the lithium carbonate that has agglomerated or washed wet in the air. Although the drying and crushing devices currently on the market can perform crushing treatment before drying to meet the drying and crushing of lithium carbonate, when the devices are used, most of them concentrate all the lithium carbonate in a crushing chamber, and a group of crushing mechanisms are used to perform the crushing operation. This method does not have a very good crushing effect, takes a long time to crush, and has low efficiency. Summary of the invention

[0003] In view of the above situation, in order to overcome the defects of the prior art, the purpose of the utility model is to provide a lithium carbonate drying and crushing device, which solves the technical problems of poor crushing effect and low efficiency of the existing drying and crushing devices.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A drying and crushing device comprises: a box body; a feed hopper, which is arranged on the top of the box body; a material guide platform is arranged in the feed hopper, and the two sides of the material guide platform form a first channel and a second channel with the inner wall of the feed hopper respectively; a first crushing bin and a second crushing bin are arranged inside the box body, and a drying chamber is formed below the first crushing bin and the second crushing bin and connected with the first crushing bin and the second crushing bin; crushing mechanisms are respectively arranged inside the first crushing bin and the second crushing bin; wherein, the first crushing bin is connected to the first channel, the second crushing bin is connected to the second channel, and the bottom walls of the first crushing bin and the second crushing bin are respectively provided with a plurality of filter holes.

[0006] The utility model divides the lithium carbonate in the feed hopper into two paths and sends them to two crushing bins for crushing by setting a material guide platform, so that the material discharge is fast, and the lithium carbonate raw material is crushed by a group of crushing mechanisms in the two crushing bins respectively, and the raw material can fully contact with the crushing blades, which can not only improve the crushing effect, but also shorten the crushing time and improve the efficiency.

[0007] Optionally, the material guiding platform is located in the middle of the bottom of the feed hopper, and both ends of the material guiding platform are connected to the inner wall of the feed hopper, and both sides have inclined surfaces.

[0008] Optionally, a first filter plate and a first baffle are provided inside the box, one end of the first filter plate is connected to the inner wall of the box, the other end of the first filter plate is connected to one end of the first baffle, the first baffle is vertically or obliquely arranged, and the end away from the first filter plate is connected to the material guide platform, and the first filter plate, the first baffle and the inner wall of the box form a first crushing bin; a second filter plate and a second baffle are provided inside the box, one end of the second filter plate is connected to the inner wall of the box, the other end of the second filter plate is connected to one end of the second baffle, the second baffle is vertically or obliquely arranged, and the end away from the second filter plate is connected to the material guide platform, and the second filter plate, the second baffle and the inner wall of the box form a second crushing bin; wherein, the first filter plate and the second filter plate are respectively provided with filter holes of the same or different apertures.

[0009] Optionally, the first baffle plate and the second baffle plate are arranged obliquely, and the first baffle plate and the second baffle plate gradually expand from top to bottom.

[0010] Optionally, a hot air blower is provided outside the box, the air outlet of the hot air blower is connected to the drying chamber, and the air inlet is connected to a circulation pipeline, and the end of the circulation pipeline away from the hot air blower is connected to the drying chamber or the first crushing chamber and the second crushing chamber through a dehumidifier.

[0011] Optionally, an air outlet is opened on the outer wall of the box away from the hot air blower, a first filter is provided at the air outlet, a shell is provided on one side of the filter, the dehumidifier is provided inside the shell, one end of the circulation pipeline is connected to the dehumidifier, and the other end is connected to the air inlet end of the hot air blower.

[0012] Optionally, the first baffle and the second baffle are both provided with filter holes, the outer wall of the box outside the first crushing bin and the second crushing bin is respectively provided with an air outlet, the air outlet is respectively provided with a first filter screen, a shell is respectively provided on one side of the first filter screen, a dehumidifier is provided in each shell, one end of the circulation pipeline is connected to the two dehumidifiers through two branch pipes, and the other end of the circulation pipeline is connected to the air inlet end of the hot air blower. By arranging the baffle in an eight-shaped shape, arranging the filter holes on the baffle, and arranging the air outlet on the outer wall of the crushing bin, the filtering efficiency and drying efficiency of the lithium carbonate raw material in the crushing bin can be further improved.

[0013] Optionally, a first vibrator is provided on the first filter plate or the first baffle, and a second vibrator is provided on the second filter plate or the second baffle. The vibrator can help improve the filtering efficiency of lithium carbonate.

[0014] Optionally, the crushing mechanism includes a first motor installed on the top of the box, the power output end of the first motor is connected to a first rotating shaft, the first rotating shaft passes through the box and extends into a crushing bin, and a crushing blade is provided on the outer wall of the first rotating shaft.

[0015] Optionally, a stirring mechanism is provided in the drying chamber; the stirring mechanism includes a second motor installed on the outside of the box body, a second rotating shaft is connected to the power output end of the second motor, the other end of the second rotating shaft passes through the box body and extends to the inside of the box body and is rotatably connected to the inner wall of the box body through a bearing, and a plurality of stirring rods are provided on the outer wall of the second rotating shaft.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] The utility model divides the lithium carbonate in the feed hopper into two paths and sends them to two crushing bins for crushing by setting a material guide platform, so that the material feeding is fast, and the lithium carbonate raw material is crushed by a group of crushing mechanisms in the two crushing bins respectively, so that the raw material can fully contact with the crushing blades, which can not only improve the crushing effect, but also shorten the crushing time and improve the efficiency. By setting the baffle in an eight-shaped shape, setting filter holes on the baffle, and setting the air outlet on the outer wall of the crushing bin, the filtering efficiency and drying efficiency of the lithium carbonate raw material in the crushing bin can be further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 It is a structural schematic diagram of the utility model.

[0020] Figure 2 It is a schematic diagram of the internal structure of the utility model.

[0021] Figure numerals: 1. Box body; 2. Feed hopper; 21. First channel; 22. Second channel; 3. Material guide table; 4. First crushing bin; 41. First filter plate; 42. First baffle; 43. First vibrator; 44. Observation window; 5. Second crushing bin; 51. Second filter plate; 52. Second baffle; 53. Second vibrator; 6. Drying chamber; 7. Crushing mechanism; 71. First motor; 72. First rotating shaft; 73. Crushing blade; 8. Stirring mechanism; 81. Second motor; 82. Second rotating shaft; 83. Stirring rod; 9. Hot air blower; 91. Circulation pipeline; 10. Dehumidifier; 11. First filter; 12. Shell; 13. Second filter. DETAILED DESCRIPTION

[0022] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0023] In the description of the embodiments of the present utility model application, it needs to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", "end", "side", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present utility model application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present utility model application.

[0024] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present utility model application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0025] In the embodiments of the present utility model application, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model application can be understood according to the specific circumstances.

[0026] In the embodiments of the utility model application, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0027] The disclosure below provides many different embodiments or examples for realizing different structures of the embodiments of the utility model application. In order to simplify the disclosure of the embodiments of the utility model application, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the embodiments of the utility model application. In addition, the embodiments of the utility model application can repeat reference numbers and / or reference letters in different examples, and 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.

[0028] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0029] like Figure 1 and Figure 2 As shown, an embodiment of the utility model application provides a drying and crushing device for crushing and drying lithium carbonate raw materials. The drying and crushing device includes: a box body 1, a feed hopper 2, a material guide table 3, a first crushing bin 4, a second crushing bin 5, a drying chamber 6 and a crushing mechanism 7.

[0030] The feed hopper 2 is arranged at the feed port on the top of the box body 1. A discharge port is arranged at the bottom of the box body 1, and a discharge valve is installed on the discharge port.

[0031] The material guide platform 3 is arranged at the inner bottom of the feed hopper 2, and the material guide platform 3 is located in the middle of the feed hopper 2, and its two ends are connected to the two side walls of the feed hopper 2. Optionally, the material guide platform 3 is connected to the inner walls of the front and rear sides of the feed hopper 2, and there is a gap between the left and right sides of the material guide platform 3 and the inner wall of the feed hopper 2, thereby, the left and right sides of the material guide platform 3 and the inner wall of the feed hopper 2 form a first channel 21 and a second channel 22, respectively.

[0032] Optionally, the left and right sides of the material guiding platform 3 are respectively arranged in inclined surfaces.

[0033] Optionally, the cross section of the material guiding platform 3 is a triangular structure.

[0034] The first crushing bin 4 and the second crushing bin 5 are formed at the inner top of the box body 1. The first crushing bin 4 is connected to the first channel 21, and the second crushing bin 5 is connected to the second channel 22. Below the first crushing bin 4 and the second crushing bin 5 is a drying chamber 6. The bottom walls of the first crushing bin 4 and the second crushing bin 5 are respectively provided with a plurality of filter holes, which are connected to the drying chamber 6. The first crushing bin 4 and the second crushing bin 5 are respectively provided with crushing mechanisms 7. The crushing mechanisms 7 crush the lithium carbonate raw material, and the crushed qualified raw material enters the drying chamber 6 through the filter holes, and the drying chamber 6 dries the crushed lithium carbonate.

[0035] The utility model divides the lithium carbonate in the feed hopper 2 into two paths and sends them to two crushing bins for crushing by setting the material guide table 3, which not only speeds up the material feeding, but also helps to improve the crushing effect and ensure the crushing efficiency. At the same time, the filter holes of the first crushing bin 4 and the second crushing bin 5 can be set to different apertures to meet the needs of crushing lithium carbonate raw materials with different particle sizes, thereby increasing the application range of the device.

[0036] In one embodiment, a material discharge baffle is movably provided on the first channel 21 and the second channel 22, respectively, and the material discharge baffle is used to control the discharge amount of lithium carbonate. The material discharge baffle is not shown in the figure, and a pull-out baffle can be used, and the material discharge baffle is pulled to different positions to form openings of different sizes in the channel. When in use, the material discharge baffle can be adjusted according to the situation inside the crushing bin to control the feed amount of lithium carbonate raw material.

[0037] In one embodiment, a first filter plate 41 and a first baffle plate 42 are provided inside the box body 1, one end of the first filter plate 41 is connected to the inner wall of the box body 1, and the other end of the first filter plate 41 is connected to one end of the first baffle plate 42. The first baffle plate 42 is vertically or obliquely arranged, and the end away from the first filter plate 41 is connected to the bottom or side wall of the material guide table 3. The first filter plate 41, the first baffle plate 42 and the top wall and the left inner wall of the box body 1 form a first crushing bin 4.

[0038] Furthermore, a second filter plate 51 and a second baffle plate 52 are provided inside the box body 1, one end of the second filter plate 51 is connected to the inner wall of the box body 1, and the other end of the second filter plate 51 is connected to one end of the second baffle plate 52, the second baffle plate 52 is vertically or obliquely arranged, and the end away from the second filter plate 51 is connected to the bottom or side wall of the material guide table 3, and the second filter plate 51, the second baffle plate 52 and the top wall and the right inner wall of the box body 1 form a second crushing bin 5.

[0039] The first filter plate 41 and the second filter plate 51 are respectively provided with filter holes of the same or different pore sizes.

[0040] As an implementation scenario, in this scenario, the first baffle plate 42 and the second baffle plate 52 are arranged obliquely, and the first baffle plate 42 and the second baffle plate 52 gradually expand from top to bottom.

[0041] Optionally, a first vibrator 43 is provided on the first filter plate 41 or the first baffle plate 42 , and a second vibrator 53 is provided on the second filter plate 51 or the second baffle plate 52 .

[0042] Optionally, the first crushing bin 4 and the second crushing bin 5 are respectively provided with observation windows 44 .

[0043] In one embodiment, the crushing mechanism 7 includes a first motor 71 installed on the top of the box body 1, and the power output end of the first motor 71 is connected to a first rotating shaft 72. The first rotating shaft 72 passes through the top wall of the box body 1 and extends to the corresponding crushing bin. A crushing blade 73 is arranged on the outer wall of the first rotating shaft 72.

[0044] In one embodiment, a stirring mechanism 8 is disposed in the drying chamber 6. The stirring mechanism 8 can stir and disperse the lithium carbonate to improve the drying efficiency of the lithium carbonate.

[0045] Specifically, the stirring mechanism 8 includes a second motor 81 installed on the outside of the box body 1, and the power output end of the second motor 81 is connected to the second rotating shaft 82. The other end of the second rotating shaft 82 passes through the left side wall of the box body 1 and extends to the inside of the box body 1. The second rotating shaft 82 is rotatably connected to the right inner wall of the box body 1 through a bearing, and a plurality of stirring rods 83 are arranged on the outer wall of the second rotating shaft 82.

[0046] In one embodiment, the drying chamber 6 is input with hot air by a hot air blower 9 installed outside the housing 1 to dry the lithium carbonate raw material. Specifically, the hot air blower 9 is installed on the outer wall of the housing 1 through a mounting plate, and its air outlet end is connected to the drying chamber 6 through a pipeline, and its air inlet end is connected to a circulation pipeline 91, and the other end of the circulation pipeline 91 is connected to the drying chamber 6 through a dehumidifier 10.

[0047] As an implementation scenario, in this scenario, an air outlet is provided on the outer wall of the box body 1 away from the hot air blower 9, a first filter screen 11 is provided at the air outlet, a shell 12 is provided on one side of the first filter screen 11, a dehumidifier 10 is provided inside the shell 12, one end of the circulation pipeline 91 is connected to the dehumidifier 10, and the other end is connected to the air inlet end of the hot air blower 9. When in use, by starting the hot air blower 9, hot air is blown out to dry the lithium carbonate in the drying chamber 6, moisture enters the dehumidifier 10 for dehumidification, and the dehumidified air enters the hot air blower 9 through the circulation pipeline 91 to reduce heat loss.

[0048] In another embodiment, the drying chamber 6 is input with hot air by a hot air blower 9 installed outside the housing 1 to dry the lithium carbonate raw material. Specifically, the hot air blower 9 is installed on the outer wall of the housing 1 through a mounting plate, and its air outlet is connected to the drying chamber 6 through a pipeline, and its air inlet is connected to a circulation pipeline 91, and the other end of the circulation pipeline 91 is connected to the first crushing bin 4 and / or the second crushing bin 5 through a dehumidifier 10. Correspondingly, filter holes are provided on the first baffle 42 and the second baffle 52. By providing filter holes on the baffle and providing the air outlet on the outer wall of the crushing bin, the filtering efficiency and drying efficiency of the lithium carbonate raw material in the crushing bin can be improved.

[0049] As an implementation scenario, in this scenario, filter holes are provided on the first baffle 42 and the second baffle 52, air outlets are respectively opened on the outer walls of the box body 1 outside the first crushing bin 4 and the second crushing bin 5, and first filter nets are respectively provided at the air outlets. A shell is respectively provided on one side of the first filter net, and a dehumidifier is provided in the shell. One end of the circulation pipeline is connected to the two dehumidifiers through two branch pipes, and the other end of the circulation pipeline is connected to the air inlet end of the hot air blower.

[0050] Optionally, a second filter screen 13 may be provided between the dehumidifier 10 and the first filter screen 11, which is beneficial to improving the filtering effect of the lithium carbonate powder.

[0051] When in use, first, pour the lithium carbonate raw material into the feed hopper 2, and the raw material entering the feed hopper 2 is divided into two paths and enters the first crushing bin 4 and the second crushing bin 5 from the first channel 21 and the second channel 22, and is crushed by the crushing mechanism 7 in the first and second crushing bins respectively. The lithium carbonate raw material of the right size falls into the drying chamber through the filter plate at the bottom of the crushing bin, and the hot air blower 9 inputs hot air into the drying chamber 6. The stirring mechanism 8 stirs the lithium carbonate so that the lithium carbonate can be fully dried, and the moisture of the lithium carbonate powder with water vapor enters the shell 12, and the first filter screen 11 and the second filter screen 13 filter out the powder. The dehumidifier 10 dehumidifies the humid air, and the dehumidified air enters the hot air blower 9 through the circulation pipeline 91.

[0052] Parts not described in detail in this embodiment are well-known techniques in the art.

[0053] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A drying and crushing device, characterized in that: include: Box (1); A feed hopper (2) is arranged on the top of the box body (1); A material guide platform (3) is arranged in the feed hopper (2), and two sides of the material guide platform (3) respectively form a first channel (21) and a second channel (22) with the inner wall of the feed hopper (2); The box body (1) is provided with a first crushing bin (4) and a second crushing bin (5), and a drying chamber (6) formed below the first crushing bin (4) and the second crushing bin (5) and communicating therewith; A crushing mechanism (7) is provided inside each of the first crushing bin (4) and the second crushing bin (5); The first crushing bin (4) is connected to the first channel (21), the second crushing bin (5) is connected to the second channel (22), and the bottom walls of the first crushing bin (4) and the second crushing bin (5) are respectively provided with a plurality of filter holes.

2. The drying and pulverizing device according to claim 1, characterized in that: The material guide platform (3) is located at the middle of the bottom of the feed hopper (2), the two ends of the material guide platform (3) are connected to the inner wall of the feed hopper (2), and the two sides of the material guide platform (3) have inclined surfaces.

3. The drying and pulverizing device according to claim 1, characterized in that: A first filter plate (41) and a first baffle plate (42) are arranged inside the box body (1); one end of the first filter plate (41) is connected to the inner wall of the box body (1); the other end of the first filter plate (41) is connected to one end of the first baffle plate (42); the first baffle plate (42) is arranged vertically or obliquely; one end of the first baffle plate (42) away from the first filter plate (41) is connected to the material guide platform (3); the first filter plate (41), the first baffle plate (42) and the inner wall of the box body (1) form a first crushing bin (4); A second filter plate (51) and a second baffle plate (52) are arranged inside the box body (1); one end of the second filter plate (51) is connected to the inner wall of the box body (1); the other end of the second filter plate (51) is connected to one end of the second baffle plate (52); the second baffle plate (52) is arranged vertically or obliquely, and one end away from the second filter plate (51) is connected to the material guide platform (3); the second filter plate (51), the second baffle plate (52) and the inner wall of the box body (1) form a second crushing bin (5); The first filter plate (41) and the second filter plate (51) are respectively provided with filter holes of the same or different pore sizes.

4. The drying and pulverizing device according to claim 3, characterized in that: A first vibrator (43) is provided on the first filter plate (41) or the first baffle plate (42), and a second vibrator (53) is provided on the second filter plate (51) or the second baffle plate (52).

5. The drying and pulverizing device according to claim 3, characterized in that: A hot air blower (9) is arranged outside the box (1); an air outlet end of the hot air blower (9) is connected to the drying chamber (6); an air inlet end is connected to a circulation pipeline (91); an end of the circulation pipeline (91) away from the hot air blower (9) is connected to the drying chamber (6) or the first crushing chamber (4) and the second crushing chamber (5) through a dehumidifier (10).

6. The drying and pulverizing device according to claim 5, characterized in that: An air outlet is provided on the outer wall of the box body (1) away from the hot air blower (9); a first filter (11) is provided at the air outlet; a shell (12) is provided on one side of the first filter (11); the dehumidifier (10) is arranged inside the shell (12); one end of the circulation pipeline (91) is connected to the dehumidifier (10) and the other end is connected to the air inlet end of the hot air blower (9).

7. The drying and pulverizing device according to claim 5, characterized in that: The first baffle (42) and the second baffle (52) are both provided with filter holes, the outer walls of the box body (1) outside the first crushing bin (4) and the second crushing bin (5) are respectively provided with air outlets, the air outlets are respectively provided with first filter screens (11), a shell (12) is respectively provided on one side of the first filter screen (11), a dehumidifier (10) is respectively provided in the shell (12), one end of the circulation pipeline (91) is connected to the two dehumidifiers (10) through two branch pipes, and the other end of the circulation pipeline (91) is connected to the air inlet end of the hot air blower (9).

8. The drying and pulverizing device according to claim 7, characterized in that: The first baffle plate (42) and the second baffle plate (52) are arranged obliquely, and the first baffle plate (42) and the second baffle plate (52) gradually expand from top to bottom.

9. The drying and pulverizing device according to claim 1, characterized in that: The pulverizing mechanism (7) comprises a first motor (71) mounted on the top of the housing (1); a power output end of the first motor (71) is connected to a first rotating shaft (72); the first rotating shaft (72) passes through the housing (1) and extends into the pulverizing bin; a pulverizing blade (73) is provided on the outer wall of the first rotating shaft (72).

10. The drying and pulverizing device according to claim 1, characterized in that: A stirring mechanism (8) is arranged in the drying chamber (6); the stirring mechanism (8) comprises a second motor (81) mounted outside the box body (1); a power output end of the second motor (81) is connected to a second rotating shaft (82); the other end of the second rotating shaft (82) passes through the box body (1) and extends to the inside of the box body; a plurality of stirring rods (83) are arranged on the outer wall of the second rotating shaft (82).

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