Secondary impurity removal device and impurity removal system

Abstract

The utility model provides a two -stage impurity removal device and the impurity removal system relates to tobacco processing technical field, this two -stage impurity removal device includes first transmission spare, uniform material subassembly, blanking passageway, second transmission spare, nozzle subassembly and third transmission spare. Uniform material subassembly is provided with uniform material roller, and uniform material roller sets up in the top of first transmission spare, and there is gap between uniform material roller and first transmission spare, and blanking passageway corresponds the output end of first transmission spare, and the input end of second transmission spare corresponds blanking passageway, and second transmission spare is located below first transmission spare, and nozzle subassembly sets up in the lateral wall of blanking passageway, and nozzle subassembly is towards the input end of second transmission spare, and the input end of third transmission spare corresponds blanking passageway, and third transmission spare is located below nozzle subassembly. The utility model realizes the classified recovery of the impurity removal material of being waited for the purpose, and the recyclable material in the impurity removal material of being waited for is recycled and is used again, and then improves the impurity removal efficiency of tobacco leaf impurity.

Description

Technical Field

[0001] This utility model relates to the field of tobacco processing technology, and more specifically, to a two-stage impurity removal device and system. Background Technology

[0002] In the production process of tobacco raw materials, the tobacco waste after primary impurity removal contains qualified tobacco leaves that have been mistakenly rejected, as well as lightweight impurities such as plastic film, thin rope, and feathers. Currently, the tobacco waste after primary impurity removal can be screened again by manual screening in order to facilitate the recycling and reuse of qualified tobacco raw materials. However, the screening and impurity removal efficiency is low, which affects the recycling effect of tobacco waste. Utility Model Content

[0003] The purpose of this utility model is to provide a two-stage impurity removal device and system, so as to achieve the purpose of classifying and recycling the materials to be removed, and to recycle and reuse the usable materials in the materials to be removed, thereby improving the impurity removal efficiency of tobacco leaf impurities.

[0004] The first aspect of this utility model provides a two-stage impurity removal device, which includes: First transmission component; A material leveling assembly, wherein the material leveling assembly is provided with a material leveling roller, the material leveling roller is disposed above the first conveying member, and there is a gap between the material leveling roller and the first conveying member; A material feeding channel, which corresponds to the output end of the first transmission component; The second transmission component has its input end corresponding to the material feeding channel and is located below the first transmission component. A nozzle assembly is disposed on the side wall of the material discharge channel and faces the input end of the second transmission member; The third transmission component has its input end corresponding to the material discharge channel and is located below the nozzle assembly.

[0005] In one possible embodiment of this utility model, the input end of the second transmission element is located between the input end of the third transmission element and the output end of the first transmission element.

[0006] In one possible embodiment of this utility model, the second transmission element, the first transmission element, and the third transmission element are arranged in parallel along a first direction.

[0007] In one possible embodiment of this utility model, the rotation direction of the uniform roller is perpendicular to the transmission direction of the first transmission member.

[0008] In one possible embodiment of the present invention, the material leveling assembly further includes a driving member, and the number of material leveling rollers is two, with the driving member being drivenly connected to the two material leveling rollers respectively.

[0009] In one possible embodiment of the present invention, a housing is further included, the housing defining the material discharge channel, the material discharge channel being arranged along a second direction, the nozzle assembly including a plurality of pneumatic nozzles, each of the pneumatic nozzles being disposed on one side of the material discharge channel relative to the input end of the second transmission member, the plurality of pneumatic nozzles being spaced apart along a third direction, the third direction being perpendicular to the second direction and the first direction respectively.

[0010] In one possible embodiment of this utility model, a visual detection element and a supplementary lighting element are further included, wherein the supplementary lighting element is disposed close to the visual detection element and the visual detection element is disposed toward the first transmission element.

[0011] In one possible embodiment of this utility model, the housing is provided with a mounting groove, the visual inspection element is housed in the mounting groove, and the output end of the visual inspection element is positioned facing the opening of the mounting groove.

[0012] In one possible embodiment of this invention, the visual inspection component is disposed between the material leveling assembly and the material feeding channel.

[0013] The second aspect of this utility model provides a purification system, including the secondary purification device described in any of the above embodiments.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model provides a two-stage impurity removal device and system. The first transmission component acts as a feeding channel to transport the material to be removed to the dropping channel at the output end of the first transmission component. During the transmission process on the first transmission component, the leveling roller of the leveling component is used to level and level the material to be removed, keeping it within a preset height to avoid excessive accumulation of the material and affecting subsequent impurity removal operations. During the falling process of the material to be removed through the dropping channel, the nozzle component can be activated to blow some of the impurities in the material to be removed to the input end of the second transmission component for collection. After the nozzle component is closed, the usable material in the material to be removed can fall through the dropping channel into the third transmission component, achieving the purpose of classifying and recycling the material to be removed. The usable material in the material to be removed is recycled and reused, thereby improving the impurity removal efficiency of tobacco leaf impurities. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional structural diagram of the two-stage impurity removal device provided in some embodiments of the present invention. Figure 1 ; Figure 2 This is a three-dimensional structural diagram of the two-stage impurity removal device provided in some embodiments of the present invention. Figure 2 ; Figure 3 This is a partial structural schematic diagram of the secondary impurity removal device provided in some embodiments of this utility model.

[0017] Explanation of key component symbols; 100-Secondary impurity removal device; 110-First transmission component; 120-Pushing material assembly; 121-Pushing material roller; 122-Drive component; 130-Second transmission component; 140-Third transmission component; 150-Nozzle assembly; 151-Pneumatic nozzle; 160-Housing; 161-Discharge channel; 162-Mounting groove; 163-Dustproof curtain; 170-Vision inspection component; 180-Supplemental lighting component; 190-Control component; X-First direction; Y-Second direction; Z-Third direction. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0020] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0021] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0022] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0023] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0025] refer to Figure 1 As shown, an embodiment of this application provides a two-stage impurity removal device 100, which includes a first transmission component 110, a material leveling component 120, a material discharge channel 161, a second transmission component 130, a nozzle assembly 150, and a third transmission component 140.

[0026] Specifically, in combination Figure 2 and Figure 3As shown, the material leveling assembly 120 is equipped with a material leveling roller 121, which is positioned above the first conveying member 110, with a gap between the roller and the member. The material discharge channel 161 corresponds to the output end of the first conveying member 110, and the input end of the second conveying member 130 corresponds to the material discharge channel 161, located below the first conveying member 110. The nozzle assembly 150 is disposed on the side wall of the material discharge channel 161, facing the input end of the second conveying member 130. The input end of the third conveying member 140 corresponds to the material discharge channel 161, located below the nozzle assembly 150. Accordingly, the first conveying member 110 serves as a feeding channel to transfer the material to be cleaned. The material is fed into the discharge channel 161 at the output end of the first transmission component 110. During the transmission process on the first transmission component 110, the material leveling roller 121 of the material leveling component 120 is used to flatten and level the material to be removed, so that the material to be removed is kept within a preset height, avoiding excessive accumulation of the material to be removed which would affect subsequent removal operations. During the process of the material to be removed falling through the discharge channel 161, the nozzle component 150 can be activated to blow some of the impurities in the material to be removed to the input end of the second transmission component 130 for collection. After the nozzle component 150 is closed, the usable material in the material to be removed can fall through the discharge channel 161 into the third transmission component 140, thereby achieving the purpose of classifying and recycling the material to be removed, recycling and reusing the usable material in the material to be removed, and thus improving the removal efficiency of tobacco impurities.

[0027] refer to Figure 1 and Figure 2 As shown, the secondary impurity removal device 100 has a first direction X, a second direction Y, and a third direction Z, wherein the first direction X, the second direction Y, and the third direction Z are arranged perpendicularly to each other. For example, the first direction X refers to the length direction of the secondary impurity removal device 100, the second direction Y refers to the height direction of the secondary impurity removal device 100, and the third direction Z refers to the width direction of the secondary impurity removal device 100. It is understood that the above definitions are only for ease of understanding the relative positional relationships of the various parts in the secondary impurity removal device 100 and should not be construed as limitations on this application.

[0028] Among them, the first transmission component 110, the second transmission component 130 and the third transmission component 140 can be belt conveyors. Belt conveyors are a type of efficient and continuous friction-driven material conveying equipment. In the tobacco processing flow, belt conveyors are used in the pretreatment, screening and transfer of raw materials.

[0029] In one embodiment, alternatively, such as Figure 1As shown, the input end of the second transmission member 130 is located between the input end of the third transmission member 140 and the output end of the first transmission member 110. That is, the first transmission member 110, the second transmission member 130 and the third transmission member 140 are arranged sequentially along the second direction Y. The input ends of the second transmission member 130, the third transmission member 140 and the first transmission member 110 all correspond to the material drop channel 161. The input end of the second transmission member 130 is located between the input end of the third transmission member 140 and the output end of the first transmission member 110, so that the material to be removed can fall from the material drop channel 161 under its own weight and enter the second transmission member 130 and the third transmission member 140 respectively.

[0030] In one embodiment, such as Figure 1 As shown, optionally, the rotation direction of the uniform roller 121 is perpendicular to the transmission direction of the first transmission member 110, that is, the rotation direction of the uniform roller 121 is the third direction Z, and the transmission direction of the first transmission member 110 is the first direction X. When the uniform roller 121 rotates relative to the first transmission member 110, it can contact the material to be removed and generate friction, so as to uniformly and squeeze and disperse the material to be removed, forming a thin and uniform material layer, and avoiding the material to be removed from getting stuck or blocked when passing through the uniform roller 121.

[0031] In one embodiment, reference Figure 1 and Figure 3 As shown, the secondary impurity removal device 100 also includes a housing 160, which serves a protective function. The housing 160 defines the material discharge channel 161, which is arranged along the second direction Y. The nozzle assembly 150 includes a plurality of pneumatic nozzles 151, each of which is located on the side of the material discharge channel 161 opposite to the input end of the second transmission member 130. The plurality of pneumatic nozzles 151 are spaced apart along the third direction Z. The overall length of the plurality of pneumatic nozzles 151 is adapted to the width of the input end of the second transmission member 130, ensuring that all impurities in the material to be removed in the material discharge channel 161 can be blown off, preventing the blowing airflow from creating areas that cannot be covered, and avoiding affecting the impurity recovery effect.

[0032] In summary, the first transmission component 110 of the secondary impurity removal device 100 serves as a feeding channel to transport the material to be removed to the discharge channel 161 at the output end of the first transmission component 110. During the transmission process on the first transmission component 110, the leveling roller 121 of the leveling component 120 is used to level and even out the material to be removed, keeping it within a preset height to prevent excessive accumulation of the material and its impact on subsequent impurity removal operations. As the material to be removed falls through the discharge channel 161, the nozzle component 150 can be activated to blow some of the impurities in the material to be removed to the input end of the second transmission component 130 for collection. After the nozzle component 150 is closed, the usable material in the material to be removed can fall through the discharge channel 161 into the third transmission component 140, achieving the purpose of classifying and recycling the material to be removed. The usable material in the material to be removed is recycled and reused, thereby improving the impurity removal efficiency of tobacco leaf impurities, increasing the tobacco leaf recovery rate, reducing raw material waste, and reducing the frequency of downtime for cleaning.

[0033] refer to Figure 1 As shown, an embodiment of this application provides another secondary impurity removal device 100, which includes a first transmission component 110, a material leveling component 120, a material discharge channel 161, a second transmission component 130, a nozzle assembly 150, and a third transmission component 140.

[0034] Specifically, in combination Figure 2 and Figure 3 As shown, the material leveling component 120 is provided with a material leveling roller 121, which is positioned above the first conveying member 110, and there is a gap between the material leveling roller 121 and the first conveying member 110. The material dropping channel 161 corresponds to the output end of the first conveying member 110, and the input end of the second conveying member 130 corresponds to the material dropping channel 161. The second conveying member 130 is located below the first conveying member 110. The first conveying member 110 serves as a feeding channel to convey the material to be impurity removed to the material dropping channel 161 at the output end of the first conveying member 110 during the transmission process.

[0035] In this embodiment, the nozzle assembly 150 is disposed on the side wall of the material discharge channel 161, and the nozzle assembly 150 faces the input end of the second transmission member 130. The input end of the third transmission member 140 corresponds to the material discharge channel 161, and the third transmission member 140 is located below the nozzle assembly 150. Correspondingly, the material leveling roller 121 of the material leveling assembly 120 is used to level and level the material to be removed, so that the material to be removed is kept within a preset height, avoiding excessive accumulation of the material to be removed. To affect subsequent impurity removal operations, during the process of the material to be removed falling through the material drop channel 161, the nozzle assembly 150 can be activated to blow some of the impurities in the material to be removed to the input end of the second transmission component 130 for collection. After the nozzle assembly 150 is closed, the usable material in the material to be removed can fall through the material drop channel 161 into the third transmission component 140, thereby achieving the purpose of classifying and recycling the material to be removed, recycling and reusing the usable material in the material to be removed, and thus improving the impurity removal efficiency of tobacco leaf impurities.

[0036] In one embodiment, alternatively, such as Figure 1 As shown, the input end of the second transmission member 130 is located between the input end of the third transmission member 140 and the output end of the first transmission member 110. That is, the first transmission member 110, the second transmission member 130 and the third transmission member 140 are arranged sequentially along the second direction Y. The input ends of the second transmission member 130, the third transmission member 140 and the first transmission member 110 all correspond to the material drop channel 161. The input end of the second transmission member 130 is located between the input end of the third transmission member 140 and the output end of the first transmission member 110, so that the material to be removed can fall from the material drop channel 161 under its own weight and enter the second transmission member 130 and the third transmission member 140 respectively.

[0037] Optionally, refer to Figure 1 As shown, the second transmission component 130, the first transmission component 110, and the third transmission component 140 are arranged parallel to each other along the first direction X. Correspondingly, the first transmission component 110 serves as a feeding channel, which transmits the material to be cleaned to the position of the discharge channel 161 for discharge. The second transmission component 130 and the third transmission component 140 correspond to the discharge channel 161 respectively for classifying and recycling the cleaned material. The second transmission component 130, the first transmission component 110, and the third transmission component 140 make the overall structure more compact and the space utilization rate higher.

[0038] For example, the leveling roller 121 can rotate relative to the material to be removed on the first conveyor 110 to perform the functions of squeezing, spreading and leveling. The rotation direction of the leveling roller 121 is opposite to the conveying direction of the first conveyor 110.

[0039] In one embodiment, such as Figure 1 As shown, optionally, the rotation direction of the uniform roller 121 is perpendicular to the transmission direction of the first transmission member 110, that is, the rotation direction of the uniform roller 121 is the third direction Z, and the transmission direction of the first transmission member 110 is the first direction X. When the uniform roller 121 rotates relative to the first transmission member 110, it can contact the material to be removed and generate friction, so as to uniformly and squeeze and disperse the material to be removed, forming a thin and uniform material layer, and avoiding the material to be removed from getting stuck or blocked when passing through the uniform roller 121.

[0040] Optionally, the material leveling assembly 120 further includes a drive unit 122. There are two material leveling rollers 121, and the drive unit 122 is connected to each of the two material leveling rollers 121 in a driving connection. The two material leveling rollers 121 are arranged in parallel to ensure that each roller has a certain material leveling range, thereby improving the material leveling effect on the material to be cleaned. For example, the drive unit 122 can be a rotary motor.

[0041] In one embodiment, reference Figure 1 and Figure 3 As shown, the secondary impurity removal device 100 also includes a housing 160, which serves a protective function. The housing 160 defines the material discharge channel 161, which is arranged along the second direction Y. The nozzle assembly 150 includes a plurality of pneumatic nozzles 151, each of which is located on the side of the material discharge channel 161 opposite to the input end of the second transmission member 130. The plurality of pneumatic nozzles 151 are spaced apart along the third direction Z. The overall length of the plurality of pneumatic nozzles 151 is adapted to the width of the input end of the second transmission member 130, ensuring that all impurities in the material to be removed in the material discharge channel 161 can be blown off, preventing the airflow from reaching areas that cannot be covered, thus avoiding affecting the impurity recovery effect. The plurality of pneumatic nozzles 151 together generate airflow at the input end of the second transmission member 130, blowing the impurities in the material to be removed onto the input end of the second transmission member 130, so as to facilitate the classification and recovery of the material to be removed by the second transmission member 130.

[0042] For example, each pneumatic nozzle 151 is equipped with an independent compressed air solenoid valve to achieve millisecond-level opening and closing control. The PLC precisely controls the timing and duration of the blowing according to the instructions to ensure that only the target impurities are blown away without disturbing the qualified tobacco raw materials. The impurities are blown into the lateral second transmission component 130 and transported away from the material drop channel 161 to achieve the separation of the target impurities.

[0043] Optionally, combined Figure 2 and Figure 3As shown, the secondary impurity removal device 100 further includes a visual inspection component 170 and a supplementary lighting component 180. The supplementary lighting component 180 is disposed close to the visual inspection component 170, which is positioned towards the first transmission component 110. The visual inspection component 170 performs visual inspection on the first transmission component 110 perpendicularly downward along the second direction Y. The visual inspection can be performed through visual recognition detection by imaging. The supplementary lighting component 180 is used to supplement the visual recognition detection area, preventing localized areas from being too dark and affecting the visual recognition effect, improving the uniformity of illumination, and thus improving the detection performance of visual recognition. For example, the supplementary lighting component 180 can be a supplementary light to overcome the influence of ambient light fluctuations and ensure image consistency.

[0044] Of course, such as Figure 2 As shown, the secondary impurity removal device 100 also includes a control unit 190, which is electrically connected to the vision inspection unit 170 and the supplementary lighting unit 180. The control unit 190 integrates a PLC, an image preprocessing unit, and a 5G industrial router to achieve local control and cloud-based collaboration of the secondary impurity removal device 100. The control unit 190 is electrically connected to the nozzle assembly 150, which can activate or deactivate the airflow according to control commands to allow qualified tobacco leaves to fall normally from the material to be impurized.

[0045] The image in the visual inspection unit 170 is first processed by the local image preprocessing unit for noise reduction, enhancement, compression and other operations, and then uploaded to the cloud server through the 5G dedicated network to complete the impurity identification. The cloud returns the identification results and rejection instructions to the local PLC, so as to realize the identification and screening of impurities in the material to be cleaned.

[0046] Optionally, refer to Figure 3 As shown, the housing 160 is provided with a mounting groove 162, and the visual inspection element 170 is housed in the mounting groove 162. The output end of the visual inspection element 170 is positioned facing the opening of the mounting groove 162. The mounting groove 162 of the housing 160 is used to install the visual inspection element 170, so that the visual inspection element 170 is at a set distance from the material layer, so that the visual inspection element 170 can cover the entire area of ​​the material layer to perform visual recognition and inspection of the material layer, resulting in better inspection effect.

[0047] For example, the housing 160 is provided with a dust curtain 163. The dust curtain 163 is used to cover the connection position between the housing 160 and the third transmission member 140 to form a closed space. The dust curtain 163 can also regulate and limit the material dropping space to avoid dust or falling out of the third transmission member 140 after the material to be cleaned is dropped.

[0048] Furthermore, such as Figure 3As shown, the visual inspection component 170 is disposed between the material leveling component 120 and the material dropping channel 161. On the one hand, the material leveling component 120 prevents impurities from accumulating and colliding with the visual inspection component 170. On the other hand, after the material leveling roller 121 levels and squeezes the material to be removed, it forms a thin and uniform material layer, so that the visual inspection component 170 can visually identify and inspect the material layer on the first conveying component 110, reducing the occurrence of impurities accumulating and obstructing the material, thereby improving the visual recognition effect.

[0049] The embodiments of this utility model also provide a purification system, including the secondary purification device 100 described in any of the above embodiments. The purification system including the secondary purification device 100 has all the beneficial effects of the secondary purification device 100, which will not be described in detail here.

[0050] In all examples shown and described herein, any specific values ​​should be interpreted as merely exemplary and not as limitations; therefore, other examples of exemplary embodiments may have different values.

[0051] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A two-stage impurity removal device, characterized in that, include: First transmission component; A material leveling assembly, wherein the material leveling assembly is provided with a material leveling roller, the material leveling roller is disposed above the first conveying member, and there is a gap between the material leveling roller and the first conveying member; A material feeding channel, which corresponds to the output end of the first transmission component; The second transmission component has its input end corresponding to the material feeding channel and is located below the first transmission component. A nozzle assembly is disposed on the side wall of the material discharge channel and faces the input end of the second transmission member; The third transmission component has its input end corresponding to the material discharge channel and is located below the nozzle assembly.

2. The secondary impurity removal device according to claim 1, characterized in that, The input terminal of the second transmission device is located between the input terminal of the third transmission device and the output terminal of the first transmission device.

3. The secondary impurity removal device according to claim 1, characterized in that, The second transmission element, the first transmission element, and the third transmission element are arranged in parallel along a first direction.

4. The secondary impurity removal device according to claim 1, characterized in that, The rotation direction of the leveling roller is perpendicular to the transmission direction of the first transmission component.

5. The secondary impurity removal device according to claim 4, characterized in that, The material leveling assembly also includes a driving component, and there are two material leveling rollers. The driving component is connected to the two material leveling rollers respectively.

6. The secondary impurity removal device according to any one of claims 1 to 5, characterized in that, It also includes a housing that defines the material discharge channel, the material discharge channel being arranged along a second direction, and the nozzle assembly including a plurality of pneumatic nozzles, each of the pneumatic nozzles being disposed on one side of the material discharge channel relative to the input end of the second transmission member, the plurality of pneumatic nozzles being spaced apart along a third direction, the third direction being perpendicular to the second direction and the first direction, respectively.

7. The secondary impurity removal device according to claim 6, characterized in that, It also includes a visual inspection component and a supplementary lighting component, wherein the supplementary lighting component is disposed close to the visual inspection component and the visual inspection component is disposed toward the first transmission component.

8. The secondary impurity removal device according to claim 7, characterized in that, The housing is provided with a mounting groove, the visual inspection component is housed in the mounting groove, and the output end of the visual inspection component is positioned facing the opening of the mounting groove.

9. The secondary impurity removal device according to claim 7, characterized in that, The visual inspection component is disposed between the material leveling assembly and the material feeding channel.

10. A purification system, characterized in that, Includes the secondary impurity removal device as described in any one of claims 1 to 9.

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