A tobacco separation device and tobacco separation system
By designing a tobacco shred separation device, utilizing a vibrating screen plate and a fan to separate stems and skewers, combined with a cyclone separator, the problem of low stem and skewer removal rate in tobacco shreds was solved, achieving efficient improvement in tobacco shred purity and quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA TOBACCO GUANGDONG IND
- Filing Date
- 2025-07-24
- Publication Date
- 2026-07-03
AI Technical Summary
In existing technologies, the removal rate of stems and twigs in tobacco shreds is low, resulting in low purity of tobacco shreds, which affects the quality of cigarette products and the combustion process.
Design a tobacco shred separation device, including a feeding component and a separation component. The device uses a primary vibrating screen plate and a fan to create negative pressure, and separates the tobacco shreds from the stems through vibration and screening. A cyclone separator is used to further purify the airflow, achieving efficient separation.
This improved the removal rate of tobacco stems, ensuring the purity and taste of the tobacco, and enhancing the quality of cigarette products.
Smart Images
Figure CN224440376U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of tobacco production technology, and more specifically, to a tobacco separation device and a tobacco separation system. Background Technology
[0002] During tobacco processing, after leaf threshing, re-drying, and stem separation, a certain proportion of tobacco leaves still contain stems. These stems will form stem stalks in the finished tobacco shreds during the subsequent shredding process. The stem stalk content of tobacco shreds has a significant impact on the rolling quality, combustion process, and sensory quality of cigarette products.
[0003] In related technologies, the removal of stems and twigs from tobacco shreds is mainly concentrated in the tobacco processing and rolling processes. In the tobacco processing stage, on-site air separation equipment can simultaneously remove heavy foreign objects and some stems and twigs. In the rolling stage, the cigarette rolling machine is equipped with an inlet air separation pipe, which can also remove some stems and twigs. Both removal methods are based on the principle of pneumatic flotation, using pneumatic blowing to separate stems and twigs with higher suspended speeds from the tobacco shreds. However, due to the uneven distribution of airflow velocity and the uneven dispersion of tobacco materials during the air separation process, it is difficult to maintain a high stem and twig removal rate. Utility Model Content
[0004] In order to at least address some of the deficiencies mentioned in the related technologies, this application provides a tobacco separation device and a tobacco separation system.
[0005] To achieve the above objectives, a tobacco shred separation device is provided for separating tobacco shreds mixed in with air-classified rejects. The tobacco shred separation device includes a feeding assembly and a separation assembly. The feeding assembly is located downstream of a secondary air-classifying device on a tobacco shred production line, and is used to convey the rejects produced by the secondary air-classifying device. The separation assembly includes a loosening mechanism and a separation mechanism. The loosening mechanism includes a primary vibrating screen plate, and the material conveyed by the feeding assembly can fall onto the primary vibrating screen plate. The separation mechanism includes a first cavity and a second cavity vertically arranged and interconnected. The first cavity has a first discharge port, and the second cavity has a second discharge port. The first cavity is in material communication with the primary vibrating screen plate, and a fan for creating negative pressure is installed in the second cavity.
[0006] Furthermore, the first discharge port is located at the bottom of the first cavity. A cyclone separator is provided at one end of the first cavity away from the first discharge port, and one end of the second cavity is connected to the cyclone separator and communicates with the first cavity through the cyclone separator.
[0007] Furthermore, the connection between the primary vibrating screen plate and the first cavity is located between the first discharge port and the cyclone separator.
[0008] Furthermore, a gas pipe is provided at the air outlet of the blower, the gas pipe passes through the cyclone separator and extends into the second cavity at a position away from the second discharge port.
[0009] Furthermore, the loosening mechanism also includes a filament sieve, which is vertically positioned below the primary vibrating screen plate. Material falling from the primary vibrating screen plate will fall onto the secondary vibrating screen plate of the filament sieve, which can deliver the material into the first cavity.
[0010] Furthermore, the gap between the screen plates of the first-stage vibrating screen plate is set to 10mm, and the gap between the screen plates of the second-stage vibrating screen plate is set to 5mm.
[0011] Furthermore, the feeding assembly includes an elevator, the feed end of which is located at the reject output of the secondary air separation equipment, and the discharge end of which is located near the primary vibrating screen plate and is capable of conveying materials to the primary vibrating screen plate.
[0012] Furthermore, the tobacco separation device includes a support assembly, which includes a fixing part and an adjusting part. The adjusting part is movable in the vertical direction relative to the fixing part, and the loosening mechanism is disposed on the adjusting part.
[0013] Furthermore, a discharge airlock is provided at the second discharge port.
[0014] This application also provides a tobacco shred separation system, including a control circuit board, a conveying device, and the tobacco shred separation device described in any of the above embodiments. The conveying device is disposed below the second discharge port for conveying the separated tobacco shreds; a weighing component is provided on the conveying device, and the weighing component and the fan are electrically connected to the control circuit board and are capable of data transmission.
[0015] With the above technical solution, when using the tobacco separation device of this application, the feeding component is placed downstream of the secondary air classifier to transport the rejected material produced by the secondary air classifier to the loosening mechanism of the separation component. The loosening mechanism vibrates, screens, and disperses the material through a primary vibrating screen plate, removing large particles of impurities and dispersing the tobacco clumps. The dispersed tobacco clumps are then sent to the first chamber by the primary vibrating screen plate. The blower is started, creating a negative pressure in the first chamber. Lighter tobacco shreds are drawn into the second chamber and fall from the second discharge port; heavier stems or impurities fall directly from the first discharge port, thus achieving the separation of tobacco shreds and impurities, and further recovering the tobacco shreds from the rejected material.
[0016] The tobacco separation device of this application can disperse the rejected material through the loosening component, and then effectively separate the tobacco shreds and other impurities such as stems from the rejected material through the separation component, so as to achieve a high stem removal rate, thereby ensuring the cleanliness and purity of the tobacco shreds and improving the taste of the tobacco shreds.
[0017] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description
[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a schematic diagram of the structure of the tobacco separation device provided in the embodiments of this application from one perspective;
[0020] Figure 2 This is a structural schematic diagram of the tobacco separation device provided in the embodiments of this application from another perspective.
[0021] icon:
[0022] 100-Feeding assembly; 200-Separation assembly; 210-Loosening mechanism; 211-First-stage vibrating screen plate; 212-Filament sieve separator; 213-Second-stage vibrating screen plate; 220-Separation mechanism; 221-First chamber; 222-Second chamber; 223-Cyclone separator; 224-Discharge airlock; 300-Blower; 310-Gas pipeline; 400-Support assembly; 410-Fixing part; 420-Adjusting part. Detailed Implementation
[0023] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0024] In the description of this application, it should be noted that the terms "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 is in use. They are used only for the convenience of describing this application and for 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 application. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0025] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup" and "connection" 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 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 application based on the specific circumstances.
[0026] This embodiment provides a tobacco shred separation device to solve the problem in related technologies where the stem removal rate is low, resulting in low tobacco shred purity.
[0027] Please see Figure 1 , Figure 2 A tobacco shred separation device is disclosed for separating tobacco shreds mixed in with air-classified rejects. The device includes a feeding assembly 100 and a separation assembly 200. The feeding assembly 100 is located downstream of the secondary air-classification equipment on the tobacco production line and is used to transport the rejects produced by the secondary air-classification equipment. The separation assembly 200 includes a loosening mechanism 210 and a separation mechanism 220. The loosening mechanism 210 includes a primary vibrating screen plate 211, and the material transported by the feeding assembly 100 can fall onto the primary vibrating screen plate 211. The separation mechanism 220 includes a first cavity 221 and a second cavity 222 vertically arranged and interconnected. The first cavity 221 has a first discharge port, and the second cavity 222 has a second discharge port. The first cavity 221 is in material communication with the primary vibrating screen plate 211, and the second cavity 222 is equipped with a fan 300 for creating negative pressure.
[0028] Specifically, when using the tobacco separation device of this embodiment to separate impurities such as tobacco shreds and stems from the rejected material, the feeding assembly 100 is positioned downstream of the secondary air classifier, with one end of the feeding assembly 100 located at the output position of the rejected material in the secondary air classifier, and the other end of the feeding assembly 100 extending above the primary vibrating screen plate 211 of the loosening mechanism 210, thereby conveying the rejected material onto the primary vibrating screen plate 211.
[0029] The primary vibrating screen plate 211 vibrates, screens, and disperses the material, removing larger impurities and breaking up clumps of tobacco. After dispersion, the material flows from the primary vibrating screen plate 211 into the first chamber 221. At this point, the negative pressure generated by the blower 300 draws the lighter tobacco into the second chamber 222, where it falls from the second outlet. Heavier stems or other impurities are not affected by the negative pressure generated by the blower 300 and fall normally from the first outlet of the first chamber 221, thus achieving the separation of tobacco from stems and other impurities.
[0030] In this embodiment, the tobacco separation device vibrates and disperses the material before separating the tobacco from the stems to prevent the stems and tobacco from tangling together. This results in a high stem removal rate and high purity of the tobacco during the separation process.
[0031] It should be noted that the negative pressure generated by the blower 300 can be set arbitrarily according to the actual situation, so that the negative pressure is within the range that can draw out the tobacco without affecting the normal falling of the tobacco stems or other impurities.
[0032] In one embodiment, exemplarily, such as Figure 1 , Figure 2 As shown, the first discharge port is located at the bottom of the first chamber 221. A cyclone separator 223 is installed at the end of the first chamber 221 away from the first discharge port. One end of the second chamber 222 is connected to the cyclone separator 223 and communicates with the first chamber 221 through the cyclone separator 223. Due to gravity, heavier impurities such as tobacco stems will naturally settle to the bottom of the first chamber 221 and be discharged through the first discharge port at the bottom. The negative pressure generated by the blower 300 is mainly used to draw lighter materials such as tobacco shreds from the first chamber 221 into the second chamber 222. This effectively separates the light tobacco shreds from the heavy impurities, improving the separation effect.
[0033] Cyclone separator 223 can further purify the gas flow entering the second chamber 222. Through the action of centrifugal force, it separates the fine particles mixed in the air, including some tobacco shreds or tiny impurities that may not be completely separated, so that the tobacco shreds collected in the second chamber 222 are of higher purity.
[0034] In this embodiment, the cyclone separator 223 mainly comprises a spirally curved pipe with no moving parts. It operates solely on the kinetic energy of the incoming airflow, resulting in low maintenance costs and high reliability. It is highly adaptable, capable of handling different flow rates and concentrations of incoming air, and suitable for continuous operation environments.
[0035] In one embodiment, exemplarily, such as Figure 1, Figure 2 As shown, the connection between the primary vibrating screen plate 211 and the first chamber 221 is located between the first discharge port and the cyclone separator 223. When material falls from the primary vibrating screen plate 211 into the first chamber 221, the connection between the first discharge port and the cyclone separator 223 forms a "top-down" material flow path while retaining an "up-down" airflow channel. This makes it easier for tobacco to be drawn upwards into the second chamber 222, and for impurities to settle downwards to be discharged from the first discharge port, achieving stratified movement of tobacco and impurities in the vertical direction, thereby improving separation efficiency and thoroughness.
[0036] If the outlet of the primary vibrating screen plate 211 is directly aligned with the first discharge port or the inlet of the cyclone separator 223, heavier impurities may accumulate near the discharge port, causing blockage, or some tobacco shreds may be carried away by the airflow before they are fully separated. In this embodiment, the connection point is set between the two, which is equivalent to providing a buffer area for the material, allowing the material sufficient time to undergo preliminary gravity stratification in the first cavity 221, and then move upward or downward according to their respective specific gravities.
[0037] In one embodiment, exemplarily, such as Figure 1 , Figure 2 As shown, a gas pipe 310 is provided at the air outlet of the blower 300. The gas pipe 310 passes through the cyclone separator 223 and extends into the second chamber 222 at a position away from the second discharge port. Extending the gas pipe 310 into the second chamber 222 but away from the second discharge port makes the airflow path longer and more circuitous, allowing the tobacco shreds more time to settle under gravity, reducing the risk of the tobacco shreds being directly carried out by the airflow, and also improving the tobacco shreds recycling efficiency and finished product yield.
[0038] By rationally arranging the end position of the gas pipe 310, a relatively uniform and stable airflow field can be formed in the second chamber 222. This allows the light tobacco to naturally settle to the second discharge port after entering the second chamber 222, while ensuring that air can be smoothly discharged without generating local eddies or dead zones, and also avoiding the "suspension" or "backflow" of tobacco caused by airflow turbulence.
[0039] If the gas pipe 310 is directly opposite the inlet of the cyclone separator 223, then under the action of negative pressure, the tobacco that has just entered the second chamber 222 may not fall normally along the second chamber 222 before being drawn into the gas pipe 310 by the high-speed airflow, resulting in the tobacco being lost with the airflow without being collected, causing waste and burdening the subsequent dust removal system.
[0040] In one embodiment, exemplarily, such as Figure 1 , Figure 2As shown, the loosening mechanism 210 also includes a tobacco clump separator 212, which is vertically positioned below the primary vibrating screen plate 211. Material falling from the primary vibrating screen plate 211 falls onto the secondary vibrating screen plate 213 of the tobacco clump separator 212, which then conveys the material into the first chamber 221. The secondary vibrating screen plate 213 in the tobacco clump separator 212 performs secondary vibration screening on the material that has been initially dispersed by the primary vibrating screen plate 211. Through vibration at appropriate frequency and amplitude, the not-yet-completely-dispersed tobacco clumps can be further broken up, resulting in a more even distribution of the tobacco. This facilitates the suction of lighter tobacco by the blower 300 and the natural settling of heavier impurities, thereby improving overall separation efficiency and purity.
[0041] Based on the coarse screening completed by the primary vibrating screen plate 211, the secondary vibrating screen plate 213 can perform more refined screening. It can further screen out fine debris, dust or small particulate impurities mixed in the tobacco, reduce the possibility of these impurities entering the first chamber 221, avoid contaminating the finished tobacco product or affecting the operation of the blower 300, and improve the cleanliness and quality consistency of the final tobacco product.
[0042] In one embodiment, for example, the sieve gap of the primary vibrating sieve plate 211 is set to 10 mm, and the sieve gap of the secondary vibrating sieve plate 213 is set to 5 mm. The primary vibrating sieve plate 211 is used to initially break up clumps of tobacco and remove larger impurities such as stems and large particles. The secondary vibrating sieve plate 213 performs a finer sieve separation on the initially dispersed material, further removing fine impurities mixed in with the tobacco. By using two sieve plates with different apertures, a progressive sieve separation from coarse to fine is achieved, allowing most impurities to be removed before the material enters the first chamber 221. This improves the efficiency of subsequent suction and airflow separation by the blower 300, reduces the risk of impurities mixing into the finished tobacco product, and ultimately results in higher purity tobacco that meets the high quality standards required for tobacco processing.
[0043] Tobacco shreds have a certain degree of flexibility, making them prone to tangling or clogging during vibration. Therefore, if a 5mm fine-mesh sieve is used from the outset, clumps of tobacco may become trapped, affecting sieving efficiency. In this embodiment, a 10mm sieve is first used for initial loosening and coarse sieving to break up large clumps of tobacco, followed by finer processing using a 5mm sieve. This effectively avoids clogging caused by insufficiently dispersed tobacco, improves the overall permeability and stability of the sieving system, and ensures continuous operation of the equipment.
[0044] Of course, in actual use, the gap between the primary vibrating screen plate 211 and the secondary vibrating screen plate 213 can be set arbitrarily according to the actual situation, as long as it can meet the screening and dispersion requirements of the material.
[0045] In one embodiment, exemplarily, such as Figure 1 , Figure 2 As shown, the feeding assembly 100 includes a hoist. The feed end of the hoist is located at the output of the rejected material from the secondary air separation equipment, and the discharge end of the hoist is located near the primary vibrating screen plate 211, capable of conveying the material onto the primary vibrating screen plate 211. The rejected material produced by the secondary air separation equipment is typically an irregular particle mixture, which may contain clumps of tobacco, stems, debris, etc. If gravity flow or simple belt conveying is used, problems such as blockage, material interruption, and uneven distribution are likely to occur. In this embodiment, by conveying the material through the hoist, the rejected material can be conveyed to the designated position at a uniform speed, ensuring a continuous and stable material supply to the tobacco separation device.
[0046] In tobacco production, the secondary air separation equipment and the primary vibrating screen 211 are usually not at the same height. The elevator can be adjusted to lift rejected materials from a lower position, such as the ground or a lower platform, to a higher position, such as the operating platform where the primary vibrating screen 211 is located. This achieves efficient material transfer between height differences, avoids process flow disruptions due to equipment installation location limitations, and improves the spatial adaptability and engineering flexibility of the entire tobacco separation unit.
[0047] Furthermore, the elevator can supply material to the primary vibrating screen plate 211 at a set speed, avoiding a large influx of material in a short period of time that could cause screen blockage, while also ensuring that the primary vibrating screen plate 211 always has a material supply, preventing idling and wasting energy.
[0048] In one embodiment, exemplarily, such as Figure 1 As shown, the tobacco shred separation device includes a support assembly 400, which includes a fixed part 410 and an adjusting part 420. The adjusting part 420 can move vertically relative to the fixed part 410, and the loosening mechanism 210 is disposed on the adjusting part 420. In actual production, various modules on the tobacco shred production line, such as the secondary air classifier, elevator, and vibrating screen, may have inconsistent heights due to installation errors, differences in equipment models, and site limitations. If a fixed support structure is used, it may lead to obstructed material conveying paths, or even blockages or spillage. In this embodiment, the adjusting part 420 can move up and down, allowing the height of the loosening mechanism 210 to be finely adjusted according to the actual installation situation. This achieves precise alignment between the loosening mechanism 210 and the discharge end of the elevator and the inlet of the first chamber 221, improving the adaptability and compatibility of the entire system and facilitating on-site commissioning and subsequent maintenance.
[0049] In one embodiment, exemplarily, such as Figure 1As shown, a discharge airlock 224 is installed at the second discharge port. The second chamber 222 contains a negative pressure environment generated by the fan 300. If the second discharge port is not sealed, air will directly enter the system from the discharge port, disrupting the original pressure difference and causing a decrease in the fan 300's suction efficiency, potentially affecting the entire tobacco separation process. The discharge airlock 224, through its rotating blade structure, effectively blocks airflow while discharging material, maintaining a negative pressure state within the second chamber 222. This ensures that the tobacco can be stably drawn in and settled, preventing airflow short-circuiting, material backflow, or separation failure caused by air backflow.
[0050] The airlock can discharge tobacco shreds evenly at a set speed, preventing material accumulation or flow interruption. It is particularly suitable for continuous tobacco processing lines, ensuring the normal operation of subsequent processes such as drying, screening, and packaging. Furthermore, enabling quantitative control and rhythm adjustment of the discharge process improves the system's automation level and continuous operation capability, enhancing the practicality of this embodiment.
[0051] This embodiment also provides a tobacco shred separation system, including a control circuit board, a conveying device, and the tobacco shred separation device from any of the above embodiments. The conveying device is located below the second discharge port and is used to convey the separated tobacco shreds; a weighing component is provided on the conveying device, and the weighing component and the fan 300 are electrically connected to the control circuit board and are capable of data transmission.
[0052] After separation, the tobacco shreds fall onto a conveyor and are transported to the next processing stage. During this process, a weighing component weighs the tobacco shreds and transmits the result to the control circuit board. Similarly, separated stems or other impurities are also conveyed and weighed via the conveyor, with the results also transmitted to the control circuit board. The control circuit board processes the data to determine the final separation result.
[0053] The control circuit board can also control the fan 300, and adjust the damper opening and fan 300 frequency in real time, so that this embodiment can be applied to the separation of tobacco shreds of different specifications or models, thereby improving the practicality of this embodiment.
[0054] The control circuit board can be any existing component or device, as long as it meets the requirements of this embodiment.
[0055] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.
[0056] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A tobacco separating device for separating tobacco intermingled in a winnower reject, characterised in that, The tobacco shred separation device includes: A feeding assembly (100) is disposed downstream of the secondary air separation equipment on the tobacco production line, and the feeding assembly (100) is used to convey the rejects produced by the secondary air separation equipment. The separation component (200) includes a loosening mechanism (210) and a separation mechanism (220). The loosening mechanism (210) includes a primary vibrating screen plate (211). The material conveyed by the feeding component (100) can fall onto the primary vibrating screen plate (211). The separation mechanism (220) includes a first cavity (221) and a second cavity (222) that are vertically arranged and interconnected. The first cavity (221) has a first discharge port, and the second cavity (222) has a second discharge port. The first cavity (221) is in material communication with the first-stage vibrating screen plate (211), and the second cavity (222) is equipped with a fan (300) for generating negative pressure.
2. A tobacco strand separating apparatus according to claim 1, characterised in that, The first discharge port is located at the bottom of the first cavity (221); A cyclone separator (223) is provided at one end of the first cavity (221) away from the first discharge port. One end of the second cavity (222) is connected to the cyclone separator (223) and communicates with the first cavity (221) through the cyclone separator (223).
3. A tobacco strand separating apparatus according to claim 2, characterised in that, The connection between the primary vibrating screen plate (211) and the first cavity (221) is located between the first discharge port and the cyclone separator (223).
4. A tobacco strand separating apparatus according to claim 2, characterised in that, A gas pipe (310) is provided at the air outlet of the blower (300). The gas pipe (310) passes through the cyclone separator (223) and extends into the second cavity (222) at a position away from the second discharge port.
5. A tobacco strand separating apparatus according to claim 1, characterised in that, The loosening mechanism (210) also includes a filament sieve (212), which is arranged vertically below the primary vibrating screen plate (211); The material falling from the primary vibrating screen plate (211) will fall onto the secondary vibrating screen plate (213) of the filament separator (212), and the secondary vibrating screen plate (213) can deliver the material into the first cavity (221).
6. A tobacco strand separating apparatus according to claim 5, characterised in that, The gap between the screen plates of the primary vibrating screen plate (211) is set to 10 mm, and the gap between the screen plates of the secondary vibrating screen plate (213) is set to 5 mm.
7. A tobacco strand separating apparatus according to claim 1, characterised in that, The feeding assembly (100) includes a hoist, the feeding end of which is located at the reject output of the secondary air separation equipment, and the discharging end of which is located near the primary vibrating screen plate (211) and is capable of conveying materials to the primary vibrating screen plate (211).
8. A tobacco strand separating apparatus according to claim 1, characterised in that, The tobacco separation device includes a support assembly (400), which includes a fixing part (410) and an adjusting part (420). The adjusting part (420) can move vertically relative to the fixing part (410), and the loosening mechanism (210) is disposed on the adjusting part (420).
9. A tobacco strand separating apparatus according to claim 1, characterised in that, A discharge airlock (224) is arranged at the second discharge port.
10. A tobacco strand separation system characterized by, The tobacco separating device comprises a control circuit board, a conveying device and the tobacco separating device according to any one of claims 1-9. The conveying device is arranged below the second discharge port and is used for conveying the separated tobacco. The conveying device is provided with a weighing assembly. The weighing assembly and the fan (300) are electrically connected to the control circuit board and can perform data transmission.