Threshing and redrying vertical winnowing device

Abstract

The invention belongs to the technical field of tobacco equipment, and discloses a threshing and redrying vertical winnower which comprises a winnowing cavity and a feeding roller, the winnowing cavity comprises a first winnowing cavity body and a second winnowing cavity body which are communicated, the first winnowing cavity body is provided with a feeding port, and the feeding roller is rotationally arranged at the feeding port and extends in the first direction; materials are evenly distributed on the feeding roller in the first direction, and the feeding roller rotates and stirs the materials to enter the first winnowing cavity. The ends, away from each other, of the first winnowing cavity and the second winnowing cavity are each provided with a winnowing outlet, the winnowing outlets extend in the first direction to form strip-shaped openings, the second winnowing cavity is connected with a draught fan through an air inlet channel, and the wind directions of the first winnowing cavity and the second winnowing cavity are the same and are both perpendicular to the first direction. Due to the design that the feeding roller is used for feeding evenly, the wind direction of the first winnowing cavity and the wind direction of the second winnowing cavity are the same and are both perpendicular to the extending direction of the feeding roller, and the strip-shaped winnowing outlets are formed, materials obtained after winnowing are evenly discharged from the corresponding winnowing outlets.

Description

TECHNICAL FIELD

[0001] The present application relates to the tobacco equipment technical field, especially to a threshing and redrying vertical air separator. BACKGROUND

[0002] The air separation process is the core link in the threshing and redrying process, and is located after threshing and stem removal. The separation of leaves and stems is realized through air separation, and the separation effect influences the size structure of leaves, the tobacco filling capacity and the rolling effect.

[0003] In the prior art, a horizontal threshing machine is used for threshing and redrying. Since the horizontal threshing machine needs to uniformly feed along the width of the threshing machine, the horizontal threshing machine cannot be combined with the existing vertical air separator. The horizontal threshing machine is combined with a horizontal air separator for threshing and air separation, but the horizontal air separator has the disadvantage of low air separation efficiency.

[0004] Therefore, it is urgent to provide a threshing and redrying vertical air separator which can be combined with a horizontal threshing machine, meet the requirement of uniform feeding of the horizontal threshing machine, and effectively improve the air separation efficiency. SUMMARY

[0005] The present application aims to provide a threshing and redrying vertical air separator which can be combined with a horizontal threshing machine, meet the requirement of uniform feeding of the horizontal threshing machine, and effectively improve the air separation efficiency.

[0006] To achieve this purpose, the present application adopts the following technical solutions:

[0007] The present application provides a threshing and redrying vertical air separator, which comprises an air separation cavity and a feeding roller. The air separation cavity comprises a first air separation cavity and a second air separation cavity which are connected to each other. The first air separation cavity is provided with a feeding port near the connection with the second air separation cavity. The feeding roller is rotationally arranged at the feeding port and extends in a first direction. The material is uniformly distributed on the feeding roller along the first direction. The feeding roller rotates and pushes the material into the first air separation cavity, and the material is uniformly distributed in the first direction.

[0008] The first air separation cavity and the second air separation cavity are each provided with an air separation outlet at an end away from each other. The air separation outlet extends in a strip shape along the first direction. The second air separation cavity is connected to a fan through an air inlet channel. The air speed in the first air separation cavity is not equal to the air speed in the second air separation cavity. The air directions in the first air separation cavity and the second air separation cavity are the same and are perpendicular to the first direction, so that the material in the air separation cavity does not move along the first direction, and the material after air separation is discharged from the corresponding air separation outlet.

[0009] As an optional technical scheme of the vertical air separator for threshing and redrying, the first air separation cavity is provided with an inclined inner arc surface, and a gap is formed between the feeding roller and the inclined inner arc surface, and the inclined inner arc surface is used for guiding the material moved by the feeding roller to slide into the first air separation cavity.

[0010] As an optional technical scheme of the vertical air separator for threshing and redrying, the inner cavities of the first air separation cavity and the second air separation cavity are equal in size in the first direction to the length of the feeding roller in the first direction.

[0011] As an optional technical scheme of the vertical air separator for threshing and redrying, the fan is a negative pressure fan, and the feeding roller is driven to rotate by negative pressure; or, the vertical air separator further comprises a driving member, and the driving member drives the feeding roller to rotate.

[0012] As an optional technical scheme of the vertical air separator for threshing and redrying, the vertical air separator further comprises an airflow distribution plate, and the airflow distribution plate extends in the first direction and is arranged at the air inlet channel.

[0013] And / or, the second air separation cavity is provided with a flow distribution shuttle, and the flow distribution shuttle is used for uniformly distributing the airflow in the first direction.

[0014] As an optional technical scheme of the vertical air separator for threshing and redrying, the airflow generated by the fan is blown from the second air separation cavity to the first air separation cavity, and the wind speed in the first air separation cavity is smaller than the wind speed in the second air separation cavity.

[0015] As an optional technical scheme of the vertical air separator for threshing and redrying, the vertical air separator further comprises a material falling device and a return pipe, the material falling device is connected to the air separation outlet of the first air separation cavity, and the material falling device is connected to the fan through the return pipe.

[0016] As an optional technical scheme of the vertical air separator for threshing and redrying, the vertical air separator further comprises a dust removal assembly, and the dust removal assembly comprises a dust removal pipeline and a dust remover, and the dust remover is connected to the fan through the dust removal pipeline.

[0017] As an optional technical scheme of the vertical air separator for threshing and redrying, the fan, the return pipe and the air inlet channel are provided with two, the two return pipes are oppositely arranged on both sides of the material falling device, the two fans are the same, and each fan is connected to the corresponding return pipe and air inlet channel.

[0018] As an optional technical scheme of the vertical air separator for threshing and redrying, the air separation outlet of the second air separation cavity is provided with a material outlet guide plate, and the material outlet guide plate is used for guiding the material to be discharged from the second air separation cavity.

[0019] Beneficial effects:

[0020] The present application provides a vertical wind separator for threshing and redrying, which comprises a wind separation cavity and a feeding roller. The wind separation cavity comprises a first wind separation cavity and a second wind separation cavity connected to each other. The first wind separation cavity is provided with a feeding port near the connection with the second wind separation cavity. The feeding roller is rotatably arranged at the feeding port and extends in a first direction. The material is uniformly distributed on the feeding roller in the first direction. The feeding roller rotates and pushes the material into the first wind separation cavity, and the material is uniformly distributed in the first direction. The first wind separation cavity and the second wind separation cavity are each provided with a wind separation outlet at an end away from each other. The wind separation outlet extends in a strip shape in the first direction. The second wind separation cavity is connected to a fan through an air inlet channel. The wind speed in the first wind separation cavity is not equal to the wind speed in the second wind separation cavity. The wind directions of the first wind separation cavity and the second wind separation cavity are the same and are perpendicular to the first direction, so that the material in the wind separation cavity does not move in the first direction, and the material after wind separation is discharged from the corresponding wind separation outlet. By arranging the feeding roller at the feeding port of the first wind separation cavity, the material is uniformly distributed on the feeding roller in the first direction. The feeding roller rotates and pushes the material into the first wind separation cavity, and ensures the uniformity of the material feeding in the first direction. By arranging the first wind separation cavity and the second wind separation cavity connected to each other, and arranging the air inlet channel and the fan at the second wind separation cavity, since the wind directions of the first wind separation cavity and the second wind separation cavity are the same and are perpendicular to the first direction, under the action of wind force and gravity, the material in the wind separation cavity does not move in the first direction, so that the material can maintain uniformity in the first direction during wind separation and avoid gathering together, and the material after wind separation can be uniformly discharged from the corresponding wind separation outlet, i.e. the strip-shaped port. The vertical wind separator for threshing and redrying can be combined with a horizontal threshing machine to meet the requirement of uniform feeding of the horizontal threshing machine. Since the wind speeds in the first wind separation cavity and the second wind separation cavity are different, the wind speed difference is used to repeatedly separate the material in the first wind separation cavity and the second wind separation cavity, thereby effectively improving the wind separation efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a partial structure schematic diagram of the first perspective of the vertical wind separator for threshing and redrying provided by the embodiment of the present application;

[0022] Figure 2 is a partial structure schematic diagram of the second perspective of the vertical wind separator for threshing and redrying provided by the embodiment of the present application;

[0023] Figure 3 is a structure schematic diagram of the wind separation cavity provided by the embodiment of the present application;

[0024] Figure 4 is a cross-sectional view of the wind separation cavity provided by the embodiment of the present application;

[0025] Figure 5 is a cross-sectional view of the wind separation cavity and the flow distribution shuttle provided by the embodiment of the present application;

[0026] Figure 6 is a design parameter table of the first vertical air separator provided by the embodiment of the present application;

[0027] Figure 7 is a design parameter table of the second vertical air separator provided by the embodiment of the present application;

[0028] Figure 8 is a design parameter table of the third vertical air separator provided by the embodiment of the present application;

[0029] Figure 9 is a processing flow chart of four-eight-eighth reflux provided by the embodiment of the present application;

[0030] Figure 10 is an air separation efficiency calculation table provided by the embodiment of the present application;

[0031] Figure 11 is an air separation flow parameter table provided by the embodiment of the present application;

[0032] Figure 12 is an air separation flow parameter table of a traditional horizontal air separator.

[0033] In the figure:

[0034] 10, air separation cavity; 10a, air separation outlet; 11, first air separation cavity; 111, feeding port; 112, inclined inner arc surface; 12, second air separation cavity; 13, waist; 20, feeding roller; 30, material falling device; 301, material falling port; 41, air inlet channel; 42, reflux pipe; 43, fan; 50, shunt shuttle. DETAILED DESCRIPTION

[0035] The present application will be further described below in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application. In addition, it should be noted that, for the convenience of description, only the parts related to the present application are shown in the drawings, but not all the structures.

[0036] In the description of the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or detachably connected, or integrated; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0037] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can include that the first and second features are in direct contact, or can include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "over" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0038] In the description of the present embodiment, the terms "upper", "lower", "left", "right" and the like orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used to distinguish in description and have no special meaning.

[0039] The existing threshing and redrying adopts a horizontal thresher, and the threshing and winnowing process is combined with multiple groups of horizontal thresher and horizontal winnower. Commonly, for a flow of 12000 kg / h, four thresher and twelve winnower, five thresher and fifteen winnower and the like layout are used. However, the winnowing efficiency of the horizontal winnower is not high, and the winnowing efficiency of the pure leaf after threshing is only 25% to 60%.

[0040] As shown in Figures 1 to 5 The present embodiment provides a vertical winnower for threshing and redrying (referred to as "vertical winnower" for short), which comprises a winnower cavity 10 and a feeding roller 20. The winnower cavity 10 comprises a first winnower cavity 11 and a second winnower cavity 12 which are connected in communication. The first winnower cavity 11 is provided with a feeding port 111 near the connection with the second winnower cavity 12. The feeding roller 20 is rotationally arranged at the feeding port 111 and extends in a first direction. The material is uniformly distributed on the feeding roller 20 in the first direction. The feeding roller 20 can block the feeding port 111 to shield external airflow interference. The feeding roller 20 rotates and pushes the material into the first winnower cavity 11, and makes the material uniformly distributed in the first direction. The first winnower cavity 11 and the second winnower cavity 12 are each provided with a winnower outlet 10a at an end away from each other. The winnower outlet 10a extends into a strip-shaped port in the first direction. The second winnower cavity 12 is connected with a fan 43 through an air inlet channel 41. The wind speed in the first winnower cavity 11 is not equal to the wind speed in the second winnower cavity 12. The wind directions of the first winnower cavity 11 and the second winnower cavity 12 are the same and are perpendicular to the first direction, so that the material in the winnower cavity 10 cannot move in the first direction, and the material after winnowing is discharged from the corresponding winnower outlet 10a.

[0041] The material is uniformly distributed on the feeding roller 20 at the first direction through the feeding roller 20 arranged at the feeding port 111 of the first winnowing cavity 11, and the material is poked into the first winnowing cavity 11 by rotating the feeding roller 20 extending in the first direction, and the uniformity of the vertical winnower material feeding in the first direction is ensured; the first winnowing cavity 11 and the second winnowing cavity 12 are arranged in communication, and the air inlet channel 41 and the fan 43 are arranged at the second winnowing cavity 12, and since the air directions of the first winnowing cavity 11 and the second winnowing cavity 12 are the same and are perpendicular to the first direction, the material in the winnowing cavity 10 cannot move in the first direction under the action of air force and gravity, so that the material can be uniformly distributed in the first direction during winnowing and cannot be accumulated together, and the material after winnowing can be uniformly discharged from the corresponding winnowing outlet 10a, i.e., the strip-shaped port, and the vertical winnower can be combined with the horizontal threshing machine to meet the requirement of uniform feeding of the horizontal threshing machine; since the air speeds in the first winnowing cavity 11 and the second winnowing cavity 12 are different, the material is repeatedly winnowed in the first winnowing cavity 11 and the second winnowing cavity 12 by using the air speed difference, so that the winnowing efficiency is effectively improved.

[0042] In the embodiment, the Z direction is the height direction of the winnowing cavity 10, the Y direction is the thickness direction of the winnowing cavity 10, the X direction is the first direction and the width direction of the winnowing cavity 10; the first winnowing cavity 11 and the second winnowing cavity 12 are arranged in the Z direction, and the first winnowing cavity 11 is located above the second winnowing cavity 12; the first winnowing cavity 11 is provided with the winnowing outlet 10a at the top, the bottom of the first winnowing cavity 11 is connected with the top of the second winnowing cavity 12, and the bottom of the second winnowing cavity 12 is also provided with the winnowing outlet 10a.

[0043] Optionally, the fan 43 is a negative pressure fan. The negative pressure fan has lower energy consumption, can be stably operated for a long time, and is easy to maintain and has low cost. The negative pressure fan can quickly discharge the pollutants such as smoke and dust generated in the material processing process to the outdoor through forced air exhaust, and can cooperate with natural air inlet to keep the air fresh, thereby effectively improving the air quality of the working environment.

[0044] In the embodiment, the fan 43 is a variable frequency driven negative pressure fan. The variable frequency driven negative pressure fan can realize stepless speed regulation and accurately control the negative pressure range to match the winnowing requirements of different materials and the winnowing requirements at different stages, is suitable for continuous production for a long time, and is helpful to save energy consumption.

[0045] Specifically, the vertical air separator further comprises a material dropping device 30, and the air outlet 10a at the top of the first air separation cavity 11 is connected with the material dropping device 30. By arranging the material dropping device 30, the material dropping device 30 can effectively block the inside of the vertical air separator from the outside environment through the internal structure of the material dropping device 30, so as to prevent the inside of the vertical air separator from being directly communicated with the outside environment through the air outlet 10a of the first air separation cavity 11, and avoid secondary dusting of tobacco materials or airflow turbulence caused by air pressure difference. The specific structure of the material dropping device 30 can be designed according to the prior art.

[0046] In the embodiment, the airflow generated by the fan 43 is blown from the second air separation cavity 12 to the first air separation cavity 11, and the air speed in the first air separation cavity 11 is less than that in the second air separation cavity 12. The material includes but is not limited to leaf connected stem, tobacco stem and leaf mixture. The air outlet 10a of the first air separation cavity 11 is used for discharging pure tobacco leaves, and the air outlet 10a of the second air separation cavity 12 is partially used for discharging tobacco stems and partially used for connecting the air inlet channel 41 to allow the airflow generated by the fan 43 to enter the second air separation cavity 12. In other embodiments, two openings can be arranged in the second air separation cavity 12 to discharge materials and air separately. The airflow in the first air separation cavity 11 and the second air separation cavity 12 can be controlled separately, or the airflow direction and the air speed in the cavities can be designed according to actual needs.

[0047] The airflow generated by the fan 43 is blown from the second air separation cavity 12 to the first air separation cavity 11, and the air speed in the first air separation cavity 11 is less than that in the second air separation cavity 12. When the material enters the first air separation cavity 11, part of the pure leaves in the material directly pass through the air outlet 10a of the first air separation cavity 11, the tobacco stems fall into the second air separation cavity 12 and are discharged through the air outlet 10a of the second air separation cavity 12. At the same time, part of the leaves falling into the second air separation cavity 12 also have the opportunity to enter the first air separation cavity 11 under the action of the airflow. The tobacco stems in the first air separation cavity 11 also enter the second air separation cavity 12 due to the low equal speed, so as to improve the air separation effect as much as possible and ensure that the pure leaves are screened out.

[0048] Optionally, the vertical air separator further comprises a backflow pipe 42, and the material dropping device 30 is connected with the fan 43 through the backflow pipe 42. By arranging the backflow pipe 42, the airflow of the air separation is recycled, which can continuously optimize the separation effect of the material, reduce energy consumption, and make the airflow in the air separation cavity 10 more uniform, so as to avoid local airflow being too strong or too weak and further improve the separation precision. The proportion of airflow backflow can be designed according to actual material separation needs.

[0049] In the embodiment, two fans 43, two return pipes 42 and two air inlet channels 41 are provided, the two return pipes 42 are oppositely arranged on the two sides of the material distributor 30, the two fans 43 are the same, and each fan 43 is connected with the corresponding return pipe 42 and air inlet channel 41. By oppositely arranging the return pipes 42 on the two sides of the material distributor 30 and arranging the same fans 43, the same specifications of the fans 43 are used, so that the air flow is symmetrically circulated in the vertical air separator, and air flow disorder caused by single-side return is avoided. In the embodiment, the two fans 43 are driven by double motors with the same frequency. By using the same fans 43 with the same frequency, the control of air pressure and air volume and fault diagnosis are facilitated, and mechanical resonance or uneven load is prevented.

[0050] In order to purify the air flow, the vertical air separator further comprises a dust removal assembly, the dust removal assembly comprises a dust removal pipeline and a dust remover, and the dust remover is connected with the fan 43 through the dust removal pipeline. On the basis of the return pipe 42, the dust removal assembly is further arranged, which can purify the air flow, and the impurities in the air flow are transported to the dust remover through the dust removal pipeline. In the embodiment, the material distributor 30 is provided with a material outlet 301 at the bottom, the material falls from the material outlet 301, the return pipes 42 are arranged on the two sides of the material distributor 30 respectively, and one fan 43 is used to drive the circulation of most of the air flow, and a small part of the air flow is transported to the dust remover through the dust removal pipeline, which helps to reduce the number of wind power machines and fans 43, control the pipe diameter of the dust removal pipeline, and reduce the cost investment.

[0051] Further, the first air separation cavity 11 is provided with an inclined inner arc surface 112, and a gap is formed between the feeding roller 20 and the inclined inner arc surface 112. The inclined inner arc surface 112 is used to guide the material moved by the feeding roller 20 to slide into the first air separation cavity 11. The inclination of the inclined inner arc surface 112 is designed according to the actual material, and the inclination of the inclined inner arc surface 112 is usually high, so that the material can automatically slide down.

[0052] When the feeding roller 20 moves the material into the first air separation cavity 11, the material can automatically slide down into the first air separation cavity 11 along the inclined inner arc surface 112, and the inclined inner arc surface 112 plays a role of auxiliary pushing and throwing of the material.

[0053] Optionally, the size of the inner cavity of the first air separation cavity 11 and the inner cavity of the second air separation cavity 12 in the X direction is equal to the length of the feeding roller 20 in the X direction. In the X direction, the length of the feeding roller 20 and the size of the inner cavity are matched, which can ensure that the material can still be uniformly distributed in the X direction after entering the inner cavity, avoid the scattering of the material due to the too large size of the inner cavity, or the gathering of the material due to the too small size of the inner cavity.

[0054] The feeding roller 20 is driven by the negative pressure generated by the fan 43 in the first air separation cavity 11, or the vertical air separator further comprises a driving member which drives the feeding roller 20 to rotate.

[0055] The feeding roller 20 is driven by negative pressure or by a driving member; if driven by negative pressure, the driving member can be omitted, the cost is lower, and the rotation of the feeding roller 20 does not interfere with the air separation in the air separation cavity 10; if the feeding roller 20 is driven by the driving member, the gap between the feeding roller 20 and the inclined inner arc surface 112 is smaller, which helps to ensure better sealing of the air separation cavity 10, and can be suitable for the case of larger material flow.

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

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

[0058] By adjusting the ratio, different air separation effects can be achieved, for example, if the ratio of the maximum thickness of the first air separation cavity 11, the maximum thickness of the waist portion 13, and the maximum thickness of the second air separation cavity 12 is reduced, the wind speed difference at different positions can be reduced, which is suitable for air separation at the early stage of the process with larger material flow; if the ratio of the maximum thickness of the first air separation cavity 11, the maximum thickness of the waist portion 13, and the maximum thickness of the second air separation cavity 12 is increased, it is suitable for air separation at the later stage of the process with smaller material flow and fewer pure blades, which increases the air separation efficiency.

[0059] When the maximum thickness of the waist portion 13 is less than or equal to 0.4 meters, the feeding roller 20 is driven by negative pressure, and the gap between the feeding roller 20 and the inclined inner arc surface 112 is set to 3cm-5cm; when the maximum thickness of the waist portion 13 is greater than 0.5 meters, the feeding roller 20 is driven by the driving member, and the gap between the feeding roller 20 and the inclined inner arc surface 112 is set to 1cm-2cm; the driving member is a motor. When the maximum thickness of the waist portion 13 is 0.4-0.5 meters, the feeding roller 20 can be driven by negative pressure or by the driving member.

[0060] In the embodiment, the size of the first air separation cavity 11 is slightly larger than the size of the second air separation cavity 12; the size of the first air separation cavity 11 in the Y direction gradually increases and then gradually decreases along the Z direction; the size of the second air separation cavity 12 in the Y direction gradually increases and then gradually decreases along the Z direction. Due to the change of the cavity size and shape, when the air blower 43 provides airflow, different wind speeds can be generated in the first air separation cavity 11 and the second air separation cavity 12, forming a wind speed difference, so that the material is subjected to multi-field repeated air separation in the first air separation cavity 11 and the second air separation cavity 12, and the air separation precision is improved.

[0061] In order to improve the uniformity of the airflow, the vertical air separator further comprises an airflow distribution plate, which extends along the X direction and is arranged at the air inlet channel 41. The airflow distribution plate is arranged at the air inlet channel 41 to distribute the airflow, which helps to improve the uniformity of the airflow.

[0062] Optionally, a shunt shuttle 50 is arranged in the second air separation cavity 12, and the shunt shuttle 50 is used to uniformly distribute the airflow along the X direction. By arranging the shunt shuttle 50, the airflow can be uniformly distributed in the X direction, ensuring that the wind speed at the middle and edge of the inner cavity is consistent, and avoiding that the wind speed at the middle of the inner cavity is too fast.

[0063] Optionally, a discharge guide plate is arranged at the air separation outlet 10a of the second air separation cavity 12, and the discharge guide plate is used to guide the material to be discharged from the second air separation cavity 12. The material separated by the second air separation cavity 12 is pushed by the discharge guide plate, and the material is uniformly discharged or pushed to the discharge belt, which is convenient for subsequent material conveying or threshing.

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

[0065] The following is the specific use process of the vertical air separator:

[0066] The material is pushed into the winnowing cavity 10 by the feeding roller 20 of the feeding port 111 in a nearly horizontal throwing state, and is in contact with the vertical upward airflow of the winnowing cavity 10. The pure leaf blade suspension speed is 2.15 m / s-3.95 m / s, the stem strip leaf is 3.5 m / s-5.95 m / s, and the pure tobacco stem is 5.15 m / s-9.95 m / s. Since the vertical winnower adopts a vertical double air field structure, the wind speed in the first winnowing cavity 11 is frequency converted and speed adjusted to about 3.5 m / s, and the wind speed in the second winnowing cavity 12 is 4.9 m / s. By utilizing the wind speed difference, the part of the leaf strip stem which is difficult to winnow can be winnowed multiple times. The falling leaf blades will re-enter the first winnowing cavity 11 in the second winnowing cavity 12, and the tobacco stems entering the first winnowing cavity 11 will enter the second winnowing cavity 12 due to the low wind speed. By utilizing the wind speed difference between the upper and lower air fields, the winnowing efficiency is improved, the purity of the selected leaf blades is improved, the pure leaf blades are selected as much as possible, the winnowing efficiency is improved, the pure leaf blades entering the threshing machine for repeated threshing and crushing loss can be reduced, the equipment structure is simple, the equipment cost is reduced, the falling material after winnowing can also meet the uniform feeding requirement of the lower threshing machine, and the number of winnowers used can be reduced by improving the winnowing efficiency.

[0067] The vertical winnower provided in the embodiment has a simple structure and is easy to operate. Compared with the traditional horizontal winnower, the equipment cost can be significantly reduced. For example, according to a flow rate of 12000 kg / h, the purchase price of a traditional horizontal winnower is about 3.5 million yuan per unit, and the cost of a vertical winnower is about 1 million yuan per unit. Compared with the same level winnower, the winnowing efficiency is improved by about 50%, and the four-threshing-twelve-division-one-reflow process can be optimized to four-threshing-eight-division-one-reflow, which can exceed the comprehensive winnowing efficiency of the original process, and can greatly reduce the investment and operation cost of the production line.

[0068] Preferably, 3-4 series of vertical winnowers with uniform specifications are adopted, which is convenient for unified manufacturing and takes into account the winnowing effect. Further, the width of the vertical winnower is consistent with the width of the threshing machine, and the specific thickness of the winnower is designed according to the flow rate. When the feeding flow rate of the material is 12000 kg / h, the width of the vertical winnower is 2 m, the maximum thickness of the first winnowing cavity 11 is 1.6 m-1.8 m, and then the maximum cross-sectional area of the first winnowing cavity 11 is 3.2 m 2 ~ 3.6 m 2 ; when the feeding flow rate of the material is 8000 kg / h, the width of the vertical winnower is 2 m, the maximum thickness of the first winnowing cavity 11 is 1.4 m-1.6 m, and then the maximum cross-sectional area of the first winnowing cavity 11 is 2.8 m 2 ~ 3.2 m 2 ; when the feeding flow rate of the material is 6000 kg / h, the width of the vertical winnower is 2 m, the maximum thickness of the first winnowing cavity 11 is 1.0 m-1.2 m, and then the maximum cross-sectional area of the first winnowing cavity 11 is 2.0 m 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 application of the vertical air separator in this embodiment for four-stage, eight-stage, and one-return flow is provided. Figure 12The parameter table for the four-striking and thirteen-stage air separation process using the traditional horizontal air separator; the four-striking and eight-stage and one-return refers to separating the tobacco and impurities by four times of striking ("four-striking"), realizing fine separation of the tobacco by eight-stage air classification ("eight-stage"), and finally returning part of the tobacco that does not meet the standard to the previous process for reprocessing ("one-return"); the four-striking and thirteen-stage refers to using thirteen-stage air classification on the basis of four times of striking; it can be known from the comparison of the data in the parameter table that the vertical air separator of the embodiment can realize the same comprehensive air separation efficiency as the horizontal air separator in the four-striking and thirteen-stage and one-return air separation process under the condition of less than the horizontal air separator.

[0074] Obviously, the above-mentioned embodiments of the present application are only examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. For those skilled in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present application. It is unnecessary and impossible to enumerate all the implementation modes. Any modification, equivalent substitution and improvement within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A vertical air separator for leaf re-drying, characterized in that, The system includes an air separation chamber (10) and a feed roller (20). 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 a feed inlet (111) near the connection with the second air separation chamber (12). The feed roller (20) is rotatably disposed at the feed inlet (111) and extends along a 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 first air separation chamber (11) and the second air separation chamber (12) are each provided with an air separation outlet (10a) at their ends that are far apart from each other. The air separation outlet (10a) extends into a strip-shaped opening along the first direction. 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 wind 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).

2. The vertical air separator for leaf re-drying according to claim 1, 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).

3. The vertical air separator for leaf re-drying according to claim 2, 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.

4. The vertical air separator for leaf re-drying according to claim 2, 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.

5. The vertical air separator for leaf re-drying according to claim 1, characterized in that, It also includes an airflow distribution plate, which extends along the first direction and is disposed at the air inlet channel (41); And / or, the second air separation chamber (12) is provided with a flow divider (50), which is used to evenly distribute the airflow along the first direction.

6. The vertical air separator for leaf re-drying 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).

7. The vertical air separator for leaf re-drying according to claim 6, characterized in that, It also includes a feeder (30) and a return pipe (42), the feeder (30) being connected to the air separation outlet (10a) of the first air separation chamber (11), and the feeder (30) being connected to the fan (43) through the return pipe (42).

8. The vertical air separator for leaf re-drying according to claim 7, 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.

9. The vertical air separator for leaf re-drying according to claim 7, 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).

10. The vertical air separator for leaf re-drying according to any one of claims 1-9, 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).

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