Vertical air classifier

Abstract

This utility model belongs to the technical field of tobacco equipment and discloses a vertical air separator, including an air separator chamber, a feeder, and a return pipe. The air separator chamber includes a first air separator chamber and a second air separator chamber that are connected to each other. By setting up the first and second air separator chambers that are connected to each other, and setting an air inlet channel and a fan at the second air separator chamber, the material is repeatedly air-separated in the first and second air separator chambers due to the difference in air velocity. This effectively improves the air separation efficiency. By setting a feeder at the air separation outlet of the first air separator chamber and connecting the feeder to the fan through the return pipe, some of the air-separated material enters the feeder from the air separation outlet of the first air separator chamber and is discharged from the feeder. The airflow from the air separation is recycled through the feeder and the return pipe, which helps to reduce the consumption of fresh air and lower operating costs.

Description

Technical Field

[0001] This utility model relates to the field of tobacco equipment technology, and in particular to a vertical air separator. Background Technology

[0002] In tobacco processing, air separators are specialized equipment used to separate impurities from materials. They achieve effective separation of materials such as tobacco leaves and stems through airflow. Due to the different densities of different materials, lighter materials are carried upward by the airflow, while heavier materials and impurities settle and are discharged.

[0003] In existing technologies, a single wind field is typically used for air separation, resulting in low efficiency. The airflow used for air separation is usually discharged directly or after purification, leading to significant consumption of fresh air and high operating costs during the process.

[0004] Therefore, there is an urgent need to provide a vertical air separator to improve air separation efficiency and realize the recycling of airflow, which will help reduce the consumption of fresh air and lower operating costs. Utility Model Content

[0005] The purpose of this invention is to provide a vertical air separator to improve air separation efficiency and realize the recycling of airflow, which helps to reduce the consumption of fresh air and lower operating costs.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] This utility model provides a vertical air separator, including an air separator chamber, a feeder, and a return pipe. The air separator chamber includes a first air separator chamber and a second air separator chamber that are connected to each other. The first air separator chamber has a feed inlet near its connection with the second air separator chamber. Both the first and second air separator chambers have air separator outlets at their ends that are far apart from each other. The second air separator chamber is connected to a fan through an air inlet channel. The wind speed in the first air separator chamber is not equal to the wind speed in the second air separator chamber. The feeder is connected to the air separator outlet of the first air separator chamber and is connected to the fan through the return pipe.

[0008] As an optional technical solution for a vertical air separator, two fans, two return pipes, and two air inlet channels are provided. The two return pipes are arranged opposite each other on both sides of the feeder. The two fans are identical, and each fan is connected to the corresponding return pipe and air inlet channel.

[0009] As an optional technical solution for a vertical air separator, it also includes a dust removal component, which includes a dust removal duct and a dust collector, and the dust collector is connected to the fan through the dust removal duct.

[0010] As an optional technical solution for a vertical air separator, a discharge guide plate is provided at the air separation outlet of the second air separation chamber, which is used to guide the material out of the second air separation chamber.

[0011] As an optional technical solution for a vertical air classifier, it also includes a feed roller, which is rotatably disposed at the feed inlet and extends along a first direction. The material is evenly distributed on the feed roller along the first direction. The feed roller rotates and pushes the material into the first air classifier cavity, and keeps the material evenly distributed in the first direction.

[0012] The air separation outlet extends into a strip-shaped opening along the first direction. The air direction in the first air separation chamber and the second air separation chamber is the same and perpendicular to the first direction, so that the material will not move along the first direction in the air separation chamber, and the material after air separation is discharged from the corresponding air separation outlet.

[0013] As an optional technical solution for a vertical air separator, the first air separator cavity is provided with an inclined inner arc surface, and there is a gap between the feed roller and the inclined inner arc surface. The inclined inner arc surface is used to guide the material propelled by the feed roller to slide down into the first air separator cavity.

[0014] As an optional technical solution for a vertical air separator, the dimensions of the inner cavities of the first air separator and the second air separator in the first direction are both equal to the length of the feed roller along the first direction.

[0015] As an optional technical solution for a vertical air separator, the fan is a negative pressure fan and the feed roller is driven to rotate by the negative pressure; or, it also includes a driving component that drives the feed roller to rotate.

[0016] As an optional technical solution for a vertical air separator, the second air separator chamber is provided with a flow divider shuttle, which is used to distribute airflow.

[0017] As an optional technical solution for a vertical air separator, the airflow generated by the fan is blown from the second air separator chamber to the first air separator chamber, and the wind speed in the first air separator chamber is less than the wind speed in the second air separator chamber.

[0018] Beneficial effects:

[0019] This utility model provides a vertical air separator, which includes an air separator chamber, a feeder, and a return pipe. The air separator chamber includes a first air separator chamber and a second air separator chamber that are connected to each other. The first air separator chamber has a feed inlet near the connection with the second air separator chamber. Both the first and second air separator chambers have air separator outlets at their ends that are far apart from each other. The second air separator chamber is connected to a fan through an air inlet channel. The wind speed in the first air separator chamber is not equal to the wind speed in the second air separator chamber. The feeder is connected to the air separator outlet of the first air separator chamber and is connected to the fan through the return pipe. By setting up a first and second air separation chamber that are connected, and setting up an air inlet channel and a fan in the second air separation chamber, the material is repeatedly air-separated in the first and second air separation chambers due to the difference in air velocity. This effectively improves the air separation efficiency. By setting up a feeder at the air separation outlet of the first air separation chamber and connecting the feeder to the fan through a return pipe, some of the air-separated material is discharged from the air separation outlet of the second air separation chamber, while some material enters the feeder from the air separation outlet of the first air separation chamber and is discharged from the feeder. The airflow from the air separation is recycled through the feeder and the return pipe, which helps to reduce the consumption of fresh air and lower operating costs. Attached Figure Description

[0020] Figure 1 This is a partial structural schematic diagram of a vertical air separator provided in an embodiment of this utility model from a first-view perspective;

[0021] Figure 2 This is a partial structural schematic diagram of the vertical air separator provided in an embodiment of the present invention from a second perspective;

[0022] Figure 3 This is a schematic diagram of the structure of the air separation chamber provided in this embodiment of the utility model;

[0023] Figure 4 This is a cross-sectional view of the air separation chamber provided in this embodiment of the utility model;

[0024] Figure 5 This is a cross-sectional view of the air separation chamber and the flow divider provided in this embodiment of the utility model;

[0025] Figure 6 This is a design parameter table for the first vertical air separator provided in this embodiment of the utility model;

[0026] Figure 7 This is a design parameter table for the second vertical air separator provided in this embodiment of the utility model;

[0027] Figure 8 This is a design parameter table for the third vertical air separator provided in this embodiment of the utility model;

[0028] Figure 9This is a processing flow chart of four-to-eight-point and one-reflow provided in this embodiment of the utility model;

[0029] Figure 10 This is a wind separation efficiency calculation table provided in this embodiment of the utility model;

[0030] Figure 11 This is a parameter table for the air separation process provided in this embodiment of the utility model;

[0031] Figure 12 This is a parameter table for the air separation process of a traditional horizontal air separator.

[0032] In the picture:

[0033] 10. Air classifier chamber; 10a. Air classifier outlet; 11. First air classifier chamber; 111. Feed inlet; 112. Inclined inner arc surface; 12. Second air classifier chamber; 13. Waist section; 20. Feed roller; 30. Discharge device; 301. Discharge port; 41. Air inlet channel; 42. Return pipe; 43. Fan; 50. Diverter shuttle. Detailed Implementation

[0034] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0035] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between 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.

[0036] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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" and "second" are only used for distinction in description and have no special meaning.

[0038] Currently, horizontal leaf-beating machines are used for leaf-beating and re-drying. Since horizontal leaf-beating machines require uniform feeding along the width of the machine, they cannot be combined with existing vertical air separators. The leaf-beating air separation process uses a combination of multiple sets of multi-stage horizontal leaf-beating machines and horizontal air separators, commonly with layouts such as four-beating-twelve-separation or five-beating-fifteen-separation for a flow rate of 12000kg / h. However, the air separation efficiency of horizontal air separators is not high, with the air separation efficiency of pure leaves after leaf beating ranging from only 25% to 60%.

[0039] like Figures 1 to 5 As shown, this embodiment provides a vertical air separator, which includes an air separator chamber 10, a feeder 30, and a return pipe 42. The air separator chamber 10 includes a first air separator chamber 11 and a second air separator chamber 12 connected to each other. The first air separator chamber 11 is provided with a feed inlet 111 near the connection with the second air separator chamber 12. Both the first air separator chamber 11 and the second air separator chamber 12 are provided with air separator outlets 10a at their ends that are far apart from each other. The second air separator chamber 12 is connected to a blower 43 through an air inlet channel 41. The wind speed in the first air separator chamber 11 is not equal to the wind speed in the second air separator chamber 12. The feeder 30 is connected to the air separator outlet 10a of the first air separator chamber 11, and the feeder 30 is connected to the blower 43 through the return pipe 42.

[0040] By setting up a first air separation chamber 11 and a second air separation chamber 12 that are connected, and setting an air inlet channel 41 and a fan 43 at the second air separation chamber 12, the air separation efficiency is effectively improved because the air velocity is different in the first air separation chamber 11 and the second air separation chamber 12. By using the air velocity difference, the material is repeatedly air separated in the first air separation chamber 11 and the second air separation chamber 12. By setting a feeder 30 at the air separation outlet 10a of the first air separation chamber 11 and connecting the feeder 30 to the fan 43 through a return pipe 42, some of the material after air separation is discharged from the air separation outlet 10a of the second air separation chamber 12, and some of the material enters the feeder 30 from the air separation outlet 10a of the first air separation chamber 11 and is discharged from the feeder 30. The airflow of the air separation is recycled through the feeder 30 and the return pipe 42, which helps to reduce the consumption of fresh air and reduce operating costs.

[0041] Furthermore, the vertical air separator also includes a feed roller 20, which is rotatably disposed at the feed inlet 111 and extends along the first direction. The material is evenly distributed on the feed roller 20 along the first direction. The feed roller 20 can block the feed inlet 111 to shield it from external airflow interference. The feed roller 20 rotates and pushes the material into the first air separation chamber 11, and keeps the material evenly distributed in the first direction. The air separation outlet 10a extends into a strip-shaped opening along the first direction. The air direction of the first air separation chamber 11 and the second air separation chamber 12 is the same and perpendicular to the first direction, so that the material will not move along the first direction in the air separation chamber 10, and the air-separated material is discharged from the corresponding air separation outlet 10a.

[0042] A feeding roller 20 is installed at the inlet 111 of the first air separation chamber 11. The material is evenly distributed on the feeding roller 20 along the first direction. The rotation of the feeding roller 20, which extends along the first direction, moves the material into the first air separation chamber 11, ensuring the uniformity of material feeding in the first direction of the vertical air separator. By setting up a first air separation chamber 11 and a second air separation chamber 12 that are connected, and setting an air inlet channel 41 and a fan 43 at the second air separation chamber 12, since the air direction of the first air separation chamber 11 and the second air separation chamber 12 is the same and both are perpendicular to the first direction, Under the combined effects of wind and gravity, the material will not move along the first direction within the air separation chamber 10, ensuring uniform material separation and preventing aggregation. The separated material is then evenly discharged from the corresponding air separation outlet 10a (strip-shaped outlet). This vertical air separator can be combined with a horizontal leaf-breaking machine to meet the uniform feeding requirements of the horizontal leaf-breaking machine. Because the wind speeds differ between the first air separation chamber 11 and the second air separation chamber 12, this speed difference allows for repeated air separation within both chambers, effectively improving separation efficiency. The proportion of airflow recirculation can be designed according to actual material sorting requirements.

[0043] In this embodiment, the Z direction is the height direction of the air separation chamber 10, the Y direction is the thickness direction of the air separation chamber 10, and the X direction is the first direction and the width direction of the air separation chamber 10; the first air separation chamber 11 and the second air separation chamber 12 are arranged along the Z direction, and the first air separation chamber 11 is located above the second air separation chamber 12; the top of the first air separation chamber 11 is provided with an air separation outlet 10a, the bottom of the first air separation chamber 11 is connected to the top of the second air separation chamber 12, and the bottom of the second air separation chamber 12 is also provided with an air separation outlet 10a.

[0044] Specifically, the air separation outlet 10a at the top of the first air separation chamber 11 is connected to the feeder 30; the feeder 30 can effectively isolate the interior of the vertical air separator from the external environment through its internal structure, preventing the interior of the vertical air separator from directly communicating with the external environment through the air separation outlet 10a of the first air separation chamber 11, and avoiding secondary dust generation or airflow turbulence caused by air pressure difference; the structure of the feeder 30 can be designed with reference to existing technology.

[0045] Optionally, fan 43 is a negative pressure fan. Using a negative pressure fan results in lower energy consumption, long-term stable operation, and simple and low-cost maintenance. The negative pressure fan can quickly expel pollutants such as smoke and dust generated during material processing to the outside by creating air convection through forced exhaust, while maintaining fresh air in conjunction with natural air intake, effectively improving the air quality of the working environment.

[0046] In this embodiment, the fan 43 is a variable frequency drive negative pressure fan. The variable frequency drive negative pressure fan can achieve stepless speed regulation and precise control of the negative pressure range to match the air separation requirements of different materials and different stages of air separation. It is suitable for continuous production with long-term operation and helps to save energy.

[0047] In this embodiment, the airflow generated by the blower 43 is blown from the second air separation chamber 12 to the first air separation chamber 11. The wind speed in the first air separation chamber 11 is lower than the wind speed in the second air separation chamber 12. The materials include, but are not limited to, leaf-stem mixtures, tobacco stems, and leaf mixtures. The air separation outlet 10a of the first air separation chamber 11 is used for the discharge of pure tobacco leaves, and the air separation outlet 10a of the second air separation chamber 12 is partly used for the discharge of tobacco stems and partly used to connect to the air inlet channel 41 so that the airflow generated by the blower 43 can enter the second air separation chamber 12. In other embodiments, two openings can be made in the second air separation chamber 12 for material discharge and air inlet, respectively. The airflow in the first air separation chamber 11 and the second air separation chamber 12 can be controlled independently, and the airflow direction and wind speed in the chambers can be designed according to actual needs.

[0048] Airflow generated by fan 43 is blown from the second air separation chamber 12 into the first air separation chamber 11, and the air velocity in the first air separation chamber 11 is lower than that in the second air separation chamber 12. When the material enters the first air separation chamber 11, some of the pure blades in the material are directly separated through the air separation outlet 10a of the first air separation chamber 11, while the tobacco stems fall into the second air separation chamber 12 and are separated through the air separation outlet 10a of the second air separation chamber 12. At the same time, some blades that fall into the second air separation chamber 12 may also enter the first air separation chamber 11 under the action of airflow. The tobacco stems in the first air separation chamber 11 will also enter the second air separation chamber 12 due to their lower velocity, so as to maximize the air separation effect and ensure that pure blades are screened out.

[0049] In this embodiment, two fans 43, two return pipes 42, and two air inlet channels 41 are provided. The two return pipes 42 are arranged opposite each other on both sides of the feeder 30. The two fans 43 are identical, and each fan 43 is connected to the corresponding return pipe 42 and air inlet channel 41. By arranging the return pipes 42 opposite each other on both sides of the feeder 30 and using identical fans 43 of the same specifications, the airflow achieves symmetrical circulation within the vertical air separator, avoiding airflow turbulence caused by unilateral return. In this embodiment, the two fans 43 are linked at the same frequency using dual motors. By linking the two identical fans 43 at the same frequency, it is helpful for controlling air pressure and air volume and for fault diagnosis, and it can also prevent mechanical resonance or uneven load.

[0050] To purify the airflow, the vertical air separator also includes a dust removal component, which consists of a dust removal duct and a dust collector. The dust collector is connected to the fan 43 via the dust removal duct. The dust removal component is further installed on the return pipe 42 to purify the airflow and transport impurities in the airflow to the dust collector via the dust removal duct. In this embodiment, the bottom of the feeder 30 has a feed inlet 301 from which the material falls. Return pipes 42 are located on both sides of the feeder 30 and are driven by a fan 43 to recirculate most of the airflow. A small portion of the airflow is transported to the dust collector via the dust removal duct. This helps reduce the number of wind turbines and fans 43 required and controls the diameter and cost of the dust removal duct.

[0051] Furthermore, the first air separation chamber 11 is provided with an inclined inner arc surface 112, and there is a gap between the feed roller 20 and the inclined inner arc surface 112. The inclined inner arc surface 112 is used to guide the material propelled by the feed roller 20 to slide down into the first air separation chamber 11. The inclination degree of the inclined inner arc surface 112 needs to be designed according to the actual material. Usually, the inclination degree of the inclined inner arc surface 112 is relatively high so that the material can slide down automatically.

[0052] When the feed roller 20 pushes the material into the first air separation chamber 11, the material can automatically slide down along the inclined inner arc surface 112 into the first air separation chamber 11. The inclined inner arc surface 112 plays an auxiliary role in pushing and throwing the material.

[0053] Optionally, the dimensions of the inner cavities of the first air separation chamber 11 and the second air separation chamber 12 in the X direction are both equal to the length of the feed roller 20 in the X direction. Designing the length of the feed roller 20 to match the inner cavity dimensions in the X direction ensures that the material remains as evenly distributed as possible in the X direction after entering the inner cavity, avoiding material scattering due to an excessively large inner cavity size or material aggregation due to an excessively small inner cavity size.

[0054] The feed roller 20 is driven by the negative pressure generated by the blower 43 in the first air separation chamber 11, or the vertical air separator also includes a driving component that drives the feed roller 20 to rotate.

[0055] The feed roller 20 is driven by negative pressure or by a drive component. If negative pressure is used, the drive component can be eliminated, resulting in lower costs, and the rotation of the feed roller 20 will not interfere with the air classification inside the air classification chamber 10. If the feed roller 20 is driven by a drive component, the feed roller 20 and the feed inlet 111 are closer together and the gap is smaller, which helps to ensure better sealing inside the air classification chamber 10 and is suitable for situations with large material flow rates.

[0056] In this embodiment, the connection between the first air separation chamber 11 and the second air separation chamber 12 is the waist 13. The ratio of the maximum thickness of the first air separation chamber 11, the maximum thickness of the waist 13, and the maximum thickness of the second air separation chamber 12 is 1:(0.4-0.6):(0.6-0.8); the ratio of the maximum thickness of the first air separation chamber 11 to the height of the vertical air separator is 1:(2.5-4.5).

[0057] Wherein, the maximum thickness of the first air separation chamber 11 refers to the maximum dimension of the first air separation chamber 11 in the Y direction, the maximum thickness of the waist 13 refers to the maximum dimension of the waist 13 in the Y direction, the maximum thickness of the second air separation chamber 12 refers to the maximum dimension of the second air separation chamber 12 in the Y direction, and the height of the vertical air separator refers to the dimension of the air separation chamber 10 in the Z direction; the specific dimensions of the vertical air separator can be designed according to the material flow rate.

[0058] Different air separation effects can be produced by adjusting the ratio. For example, if the ratio of the maximum thickness of the first air separation chamber 11, the maximum thickness of the waist section 13, and the maximum thickness of the second air separation chamber 12 is reduced, the wind speed difference at different positions can be reduced, which is suitable for the pre-stage air separation of processes with large material flow. If the ratio of the maximum thickness of the first air separation chamber 11, the maximum thickness of the waist section 13, and the maximum thickness of the second air separation chamber 12 is increased, it is suitable for the post-stage air separation of processes with small material flow and few pure blades, thereby increasing the air separation efficiency.

[0059] When the maximum thickness of the waist section 13 is less than or equal to 0.4 meters, the feed roller 20 is driven by negative pressure, and the gap between the feed roller 20 and the inclined inner arc surface 112 is set to 3cm to 5cm. When the maximum thickness of the waist section 13 is greater than 0.5 meters, the feed roller 20 is driven by a drive component, and the gap between the feed roller 20 and the inclined inner arc surface 112 is set to 1cm to 2cm. The drive component is a motor. When the maximum thickness of the waist section 13 is between 0.4 meters and 0.5 meters, the feed roller 20 can be driven by negative pressure or by a drive component.

[0060] In this embodiment, the size of the first air-separating chamber 11 is slightly larger than the size of the second air-separating chamber 12; the size of the first air-separating chamber 11 in the Y direction gradually increases and then gradually decreases along the Z direction; the size of the second air-separating chamber 12 in the Y direction gradually increases and then gradually decreases along the Z direction. Due to the changes in the size and shape of the chambers, when the blower 43 provides airflow, different wind speeds can be generated in the first air-separating chamber 11 and the second air-separating chamber 12, forming a wind speed difference. This allows the material to undergo multiple repeated air separations in the first air-separating chamber 11 and the second air-separating chamber 12, thereby improving the air separation accuracy.

[0061] To improve airflow uniformity, the vertical air separator also includes an airflow distribution plate that extends along the X direction and is located at the air inlet channel 41. The airflow distribution plate at the air inlet channel 41 distributes the airflow, thus improving airflow uniformity.

[0062] Optionally, the second air separation chamber 12 is provided with a flow divider 50, which is used to evenly distribute the airflow along the X direction. By setting the flow divider 50, the airflow can be evenly distributed in the X direction, ensuring that the wind speed is consistent in the middle and edges of the inner cavity, and avoiding excessive wind speed in the middle of the inner cavity.

[0063] Optionally, a discharge guide plate is provided at the air separation outlet 10a of the second air separation chamber 12. The discharge guide plate is used to guide the material to be discharged from the second air separation chamber 12. The material separated by the second air separation chamber 12 is pushed by the discharge guide plate, guiding the material to be discharged evenly or pushing the material to the discharge belt, which facilitates subsequent material conveying or blade removal.

[0064] Optionally, the leaf and stem content can be detected by visual analysis or X-ray at the air separation outlet 10a of the first air separation chamber 11 or the second air separation chamber 12, and automatic feedback control can be performed in an adaptive manner.

[0065] The following is a detailed description of the use of a vertical air separator:

[0066] The material is fed into the air-separating chamber 10 through the feed roller 20 at the feed inlet 111 in a near-horizontal, scattered state, and comes into contact with the vertically upward airflow within the chamber. The suspension velocity of pure leaves is 2.15 m / s to 3.95 m / s, stems and leaves 3.5 m / s to 5.95 m / s, and pure tobacco stems 5.15 m / s to 9.95 m / s. Because the vertical air separator adopts a vertical dual-airflow structure, the wind speed in the first air-separating chamber 11 is frequency-controlled to approximately 3.5 m / s, while the wind speed in the second air-separating chamber 12 is 4.9 m / s. Utilizing this wind speed difference, the more difficult-to-separate leaf and stem sections can be air-separated multiple times. Falling leaves are then re-entered into the second air-separating chamber 12. The first air separation chamber 11 contains tobacco stems that, due to their lower wind speed, will enter the second air separation chamber 12. By utilizing the wind speed difference between the upper and lower wind fields, the air separation efficiency is improved, the purity of the separated leaves is increased, and as many pure leaves as possible are selected. This improved air separation efficiency reduces the loss of pure leaves due to repeated leaf crushing in the leaf threshing machine. At the same time, the simple structure of the equipment reduces equipment costs. Furthermore, the material falling from the air separation chamber can meet the feeding requirements of the next-stage leaf threshing machine evenly. In addition, the number of air separators used can be reduced by improving the air separation efficiency.

[0067] The vertical air separator provided in this embodiment has a simple structure and is easy to operate. Compared with the traditional horizontal air separator, it can significantly reduce equipment costs. For example, based on a flow rate of 12,000 kg / h, the purchase price of a traditional horizontal air separator is about 3.5 million yuan, while the cost of a vertical air separator is roughly 1 million yuan. Moreover, the air separation efficiency is increased by about 50% compared with the same level of air separator. At the same time, the usual four-stage 12-point 1-recirculation process can be optimized to four-stage 8-point 1-recirculation, which can exceed the overall air separation efficiency of the original process, and can greatly reduce the investment and operating costs of the production line.

[0068] Preferably, 3-4 series of vertical air separators with uniform specifications are used to facilitate standardized manufacturing and ensure effective air separation. Furthermore, the width of the vertical air separator is consistent with the width of the leaf-beating machine, and the specific thickness of the air separator is designed according to the flow rate; when the material feed flow rate is 12000 kg / h, the width of the vertical air separator is 2m, and the maximum thickness of the first air separation chamber 11 is 1.6m-1.8m, then the maximum cross-sectional area of ​​the first air separation chamber 11 is 3.2m². 2 ~3.6m 2 When the material feed flow rate is 8000 kg / h, the width of the vertical air separator is 2 m, and the maximum thickness of the first air separator chamber 11 is 1.4 m to 1.6 m, then the maximum cross-sectional area of ​​the first air separator chamber 11 is 2.8 m². 2 ~3.2m 2 When the material feed flow rate is 6000 kg / h, the width of the vertical air separator is 2 m, and the maximum thickness of the first air separation chamber 11 is 1.0 m to 1.2 m, then the maximum cross-sectional area of ​​the first air separation chamber 11 is 2.0 m². 2~2.4m 2 .

[0069] To compare the air separation performance of a traditional horizontal air separator with that of the vertical air separator provided in this embodiment, such as Figures 6 to 8 As shown, this embodiment specifically provides three different specifications of vertical air separators, namely the first vertical air separator, the second vertical air separator, and the third vertical air separator; wherein, the first vertical air separator is suitable for the first to fourth air separations of the first stage of leaf cutting and the first stage air separation of the second stage of leaf cutting, the second vertical air separator is suitable for the second stage of leaf cutting air separation, and the third vertical air separator is suitable for the return air separation.

[0070] See Figure 9 The leaf-beating airflow rate is designed at 12000 kg / h, and a four-beating, eight-splitting, one-return process flow is designed using vertical air separators. The first air separator has two parallel air separators. In this embodiment, the first to fifth air separators use the first vertical air separator, the sixth to eighth air separators use the second vertical air separator, and the return air separator uses the third vertical air separator. The feed roller 20 of the first vertical air separator is driven by a drive unit, suitable for situations with a large flow rate. The feed roller 20 of the second vertical air separator is driven by negative pressure, suitable for situations with a medium flow rate. The feed roller 20 of the third vertical air separator is also driven by negative pressure, suitable for situations with a small flow rate.

[0071] Among them, flag recirculation refers to the process of separating and recirculating the leaf and stem components from the material using an air separator, while leaf recirculation refers to the process of separating and recirculating the pure leaf components from the material using an air separator.

[0072] Based on the four-to-eight-point recirculation process flow of a vertical air separator, performance simulation calculations were performed. For the dual-airflow vertical air separator, following the principle of repeated airflow separation, a 10-structure model of the airflow separation chamber was used to construct separate models of the mixed materials to be separated. These models were then substituted into the dual-airflow air separator simulation to perform a simulation of the initially designed vertical air separator. The airflow separation efficiency of the vertical air separator was calculated. (See [link / reference]). Figure 10 Depending on the stage of the vertical leaf-cutting machine, the air classification efficiency ranges from 60% to 95%, and the overall air classification efficiency of the process has reached nearly 100%.

[0073] Reference Figure 11 and Figure 12 , Figure 11 The parameter table for the actual use of the vertical air separator in this embodiment for four-stage, eight-stage, and one-stage recirculation is provided. Figure 12The table shows the parameters for a four-strike, thirteen-point air separation process using a traditional horizontal air separator. "Four-strike, eight-point, one-return" refers to separating tobacco leaves from impurities using four strikes ("four strikes"), achieving fine sorting of tobacco leaves through eight levels of air force grading ("eight-point"), and finally returning some substandard tobacco leaves to the previous process for reprocessing ("one-return"). "Four-strike, thirteen-point" refers to using thirteen levels of air force grading ("thirteen-point") on top of the four strikes. A comparison of the parameters shows that, with fewer strikes than a traditional horizontal air separator, the vertical air separator in this embodiment achieves the same overall air separation efficiency as the horizontal air separator's four-strike, thirteen-point, one-return process.

[0074] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A vertical air separator, characterized in that, The device includes an air separation chamber (10), a feeder (30), and a return pipe (42). The air separation chamber (10) includes a first air separation chamber (11) and a second air separation chamber (12) that are connected to each other. The first air separation chamber (11) has an inlet (111) near the connection with the second air separation chamber (12). The first air separation chamber (11) and the second air separation chamber (12) each have an air separation outlet (10a) at their ends that are far apart from each other. The second air separation chamber (12) is connected to a blower (43) through an air inlet channel (41). The wind speed in the first air separation chamber (11) is not equal to the wind speed in the second air separation chamber (12). The feeder (30) is connected to the air separation outlet (10a) of the first air separation chamber (11), and the feeder (30) is connected to the blower (43) through the return pipe (42).

2. The vertical air separator according to claim 1, characterized in that, Two fans (43), two return pipes (42) and two air inlet channels (41) are provided. The two return pipes (42) are arranged opposite to each other on both sides of the feeder (30). The two fans (43) are the same. Each fan (43) is connected to the corresponding return pipe (42) and air inlet channel (41).

3. The vertical air separator according to claim 1, characterized in that, It also includes a dust removal assembly, which includes a dust removal duct and a dust collector, the dust collector being connected to the fan (43) through the dust removal duct.

4. The vertical air separator according to claim 1, characterized in that, The second air separation chamber (12) is provided with a discharge guide plate at the air separation outlet (10a), which is used to guide the material to be discharged from the second air separation chamber (12).

5. The vertical air separator according to claim 1, characterized in that, It also includes a feed roller (20), which is rotatably disposed at the feed inlet (111) and extends along the first direction. The material is evenly distributed on the feed roller (20) along the first direction. The feed roller (20) rotates and pushes the material into the first air separation chamber (11), and keeps the material evenly distributed in the first direction. The air separation outlet (10a) extends into a strip-shaped opening along the first direction. The air direction in the first air separation chamber (11) and the second air separation chamber (12) is the same and perpendicular to the first direction, so that the material will not move along the first direction in the air separation chamber (10), and the material after air separation is discharged from the corresponding air separation outlet (10a).

6. The vertical air separator according to claim 5, characterized in that, The first air separation chamber (11) is provided with an inclined inner arc surface (112), and there is a gap between the feed roller (20) and the inclined inner arc surface (112). The inclined inner arc surface (112) is used to guide the material propelled by the feed roller (20) to slide down into the first air separation chamber (11).

7. The vertical air separator according to claim 5, characterized in that, The dimensions of the inner cavity of the first air separation chamber (11) and the inner cavity of the second air separation chamber (12) in the first direction are equal to the length of the feed roller (20) in the first direction.

8. The vertical air separator according to claim 5, characterized in that, The fan (43) is a negative pressure fan and the feed roller (20) is driven to rotate by negative pressure; or, it also includes a driving component that drives the feed roller (20) to rotate.

9. The vertical air separator according to claim 1, characterized in that, The second air separation chamber (12) is provided with a flow divider (50), which is used to distribute airflow.

10. The vertical air separator according to claim 1, characterized in that, The airflow generated by the fan (43) is blown from the second air separation chamber (12) to the first air separation chamber (11), and the wind speed in the first air separation chamber (11) is less than the wind speed in the second air separation chamber (12).

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