Tobacco leaf pretreatment system

Abstract

The invention relates to a tobacco leaf pretreatment system, comprising: a channel provided with a feed port, an air inlet and a first rejecting port, the feed port being configured to feed tobacco leaves into the channel, the air inlet being located laterally below the feed port and being configured to provide airflow into the channel to blow the tobacco leaves to flow along the channel; the first removing opening is formed below the feeding opening and the air inlet and is configured to discharge heavy impurities in the tobacco leaves; the first removing device comprises a filter screen, the filter screen is obliquely arranged in front of the air inlet, the lower end of the filter screen is located at the first removing port, and the filter screen is configured to prevent heavy impurities from entering the air inlet and guide the heavy impurities to the first removing port. Tobacco leaves are blown by airflow to flow along the channel, heavy impurities fall down due to the action of gravity, part of the heavy impurities fall onto the filter screen, the filter screen is obliquely arranged and guided to the first removing opening, manual participation is not needed in the impurity removing process, efficiency is high, and the impurities can be prevented from entering shredding equipment and damaging the shredding equipment.

Description

Technical Field

[0001] The invention relates to the field of tobacco processing, and in particular to a tobacco leaf pretreatment system. Background Art

[0002] In the processing of cigarette products, pretreatment of tobacco leaves before shredding is a key step to ensure the quality of the finished product. Traditional tobacco leaf pretreatment mainly uses loosening and rehumidification roller equipment, which uses the copying plate inside the roller to beat and loosen the leaves, and applies steam to rehumidify and stretch the leaves, thereby improving the processing resistance of tobacco materials. However, in the silk-making process, this equipment generally uses manual impurity removal after shredding to improve the purity of tobacco materials. The labor intensity is high and the effect is seriously delayed. By the time the impurities are manually identified, the shredding equipment may have been damaged. Impurities that are not identified and removed may also cause damage to downstream silk-making processing equipment. Summary of the invention

[0003] Some embodiments of the present invention provide a tobacco leaf pretreatment system for alleviating the problem of low efficiency in identifying and removing debris.

[0004] In one aspect of the present invention, a tobacco leaf pretreatment system is provided, comprising:

[0005] A channel is provided with a feed inlet, an air inlet and a first rejecting port, wherein the feed inlet is configured to feed tobacco leaves into the channel, the air inlet is located at a side and lower part of the feed inlet and is configured to provide airflow into the channel to blow the tobacco leaves along the channel; the first rejecting port is located below the feed inlet and the air inlet and is configured to discharge heavy debris in the tobacco leaves; and

[0006] The first rejection device includes a filter screen, which is tilted in front of the air inlet, with the lower end of the filter screen located at the first rejection port. The filter screen is configured to block heavy debris from entering the air inlet and guide the heavy debris to the first rejection port.

[0007] In some embodiments, the first rejection device includes a vibrator connected to the filter screen, and the vibrator is configured to drive the filter screen to vibrate so that heavy debris on the filter screen falls to the first rejection port.

[0008] In some embodiments, the tobacco preprocessing system further comprises a second rejecting device, wherein the second rejecting device comprises a cyclone dust collector, wherein the inlet of the cyclone dust collector is connected to the passage, and the cyclone dust collector is configured to remove fine debris from the tobacco leaves.

[0009] In some embodiments, the second rejecting device further includes a debris collecting groove, the debris outlet of the cyclone dust collector is in communication with the debris collecting groove, and the outlet of the cyclone dust collector is in communication with the channel.

[0010] In some embodiments, the tobacco preprocessing system also includes a third rejection device, which includes an image acquisition component and a jet component. The image acquisition component is configured to capture images of the tobacco leaves for analyzing whether there are non-tobacco debris in the tobacco leaves, and the jet component is configured to provide an airflow to blow away the non-tobacco debris in the tobacco leaves.

[0011] In some embodiments, the channel is further provided with a second rejection port, which is provided below the air injection member and is configured to collect and discharge the non-tobacco debris.

[0012] In some embodiments, the third rejection device also includes a light source, which shines towards the tobacco leaves.

[0013] In some embodiments, the tobacco pretreatment system also includes a moisture regeneration device, which is arranged in the channel. Along the flow direction of the tobacco in the channel, the moisture regeneration device is located downstream of the air inlet and the feed port. The moisture regeneration device includes a spray element, and the spray element is configured to humidify the channel.

[0014] In some embodiments, the moisture recovery device further includes a temperature detection element and a humidity detection element, wherein the temperature detection element and the humidity detection element are configured to detect the temperature and humidity in the channel for controlling the spray amount of the spray element.

[0015] In some embodiments, the tobacco preprocessing system also includes a loosening device, which is arranged in the channel and downstream of the rehumidification device. The loosening device includes two rollers arranged opposite to each other, and the two rollers are configured to rotate to loosen the tobacco leaves.

[0016] In some embodiments, the loosening device further comprises a traction arm, which is movably disposed on the inner wall of the channel, and the roller is disposed on the traction arm, and the traction arm is configured to drive the roller to move so as to adjust the distance between the two rollers.

[0017] In some embodiments, the channel is also provided with a material discharge port and an air outlet, the material discharge port is configured to discharge the pretreated tobacco leaves in the channel, the tobacco leaf pretreatment system also includes a wind conveying device, the outlet of the wind conveying device is connected to the air inlet, and the inlet of the wind conveying device is connected to the air outlet.

[0018] In some embodiments, air locks are respectively provided at the feed port, the first rejection port and the discharge port.

[0019] Based on the above technical solution, the present invention has at least the following beneficial effects:

[0020] In some embodiments, tobacco leaves are fed into the channel through the feed port. Since tobacco leaves are relatively light, they can be blown by the airflow entering from the air inlet and flow along the channel, while heavy debris is relatively heavy and cannot be blown by the airflow entering from the air inlet. Therefore, after the tobacco leaves fall into the channel through the feed port, the tobacco leaves are blown along the channel by the airflow, while the heavy debris falls due to gravity. Some of the heavy debris falls to the first rejection port, and some of the heavy debris falls onto the filter. Since the filter is inclined, the filter has a low end and a high end. The low end of the filter is located at the first rejection port, which is conducive to guiding the heavy debris blocked and intercepted on the filter to the first rejection port, so as to discharge the heavy debris in the tobacco leaves through the first rejection port. The debris removal process is completed during the tobacco pretreatment process, without manual participation in identifying debris. The degree of automation is high, the debris cleaning efficiency is high, and the debris can be prevented from entering the shredding equipment and causing damage to the shredding equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0022] Figure 1 A schematic diagram of the structure of a tobacco leaf pretreatment system provided according to some embodiments of the present invention;

[0023] Figure 2 A schematic diagram of the structure of a first rejecting device provided according to some embodiments of the present invention;

[0024] Figure 3 A schematic diagram of the structure of a second rejection device provided according to some embodiments of the present invention;

[0025] Figure 4 A schematic structural diagram of a third rejection device provided according to some embodiments of the present invention;

[0026] Figure 5 A schematic diagram of the structure of a moisture regaining device according to some embodiments of the present invention;

[0027] Figure 6 It is a schematic diagram of the structure of a loose device provided according to some embodiments of the present invention.

[0028] The reference numerals in the accompanying drawings are described as follows:

[0029] 1- channel; 11- feed port; 12- air inlet; 13- first reject port; 14- second reject port; 15- discharge port; 16- air outlet;

[0030] 2-first rejecting device; 21-filter; 22-vibrator;

[0031] 3-second rejecting device; 31-cyclone dust collector; 32-collecting trough;

[0032] 4-third rejection device; 41-image acquisition component; 42-jet component; 43-light source;

[0033] 5-rehumidification device; 51-spray element; 52-temperature detection element; 53-humidity detection element;

[0034] 6-loosening device; 61-roller; 62-traction arm; 63-photoelectric sensor;

[0035] 7- Wind conveying device.

[0036] It should be understood that the size of each part shown in the accompanying drawings is not drawn according to the actual proportional relationship. In addition, the same or similar reference numerals represent the same or similar components. DETAILED DESCRIPTION

[0037] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended to limit the present invention and its application or use. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present invention thorough and complete and to fully express the scope of the present invention to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary, rather than as limitations.

[0038] The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different parts. The words "include" or "comprise" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0039] In the present invention, when a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device. When a specific device is described as being connected to other devices, the specific device may be directly connected to the other devices without an intermediate device, or may not be directly connected to the other devices but have an intermediate device.

[0040] All terms (including technical terms or scientific terms) used in the present invention have the same meanings as those understood by ordinary technicians in the field to which the present invention belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined herein.

[0041] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0042] Figure 1 Schematic diagram of the structure of some embodiments of the tobacco leaf pretreatment system according to the present invention. Figure 1 In some embodiments, the tobacco leaf preprocessing system includes a channel 1 and a first rejecting device 2.

[0043] The channel 1 is provided with a feed port 11, an air inlet 12 and a first reject port 13. The feed port 11 is configured to feed tobacco leaves into the channel 1. The air inlet 12 is located at the side and lower part of the feed port 11, and the air inlet 12 is configured to provide airflow into the channel 1 to blow the tobacco leaves along the channel 1. The first reject port 13 is located below the feed port 11 and the air inlet 12, and the first reject port 13 is configured to discharge heavy debris in the tobacco leaves.

[0044] refer to Figure 1 and Figure 2 The first rejecting device 2 includes a filter screen 21, which is tilted in front of the air inlet 12. The filter screen 21 includes a lower end and a higher end. The lower end of the filter screen 21 is located at the first rejecting port 13, and the filter screen 21 is configured to block heavy debris from entering the air inlet 12 and guide the heavy debris to the first rejecting port 13.

[0045] Along the flow direction of tobacco leaves in the channel 1, the first rejection device 2 is located at the upstream of the channel 1, adjacent to the feed port 11, and is used to reject heavy debris in the tobacco leaves that falls by their own gravity. Heavy debris includes stones or metal blocks.

[0046] Optionally, in the horizontal direction, the first rejection port 13 is located between the feed port 11 and the air inlet 12. In the height direction, the first rejection port 13 is located below the feed port 11 and the air inlet 12, and the air inlet 12 is located below the feed port 11.

[0047] In the above embodiment, tobacco leaves are fed into the channel 1 through the feed port 11. Since tobacco leaves are relatively light, they can be blown by the airflow entering through the air inlet 12 and flow along the channel 1. However, heavy debris is relatively heavy and the airflow entering through the air inlet 12 cannot blow the heavy debris. Therefore, after the tobacco leaves fall into the channel 1 through the feed port 11, the tobacco leaves flow along the channel 1 due to the blowing of the airflow, while the heavy debris falls due to gravity. Some of the heavy debris falls to the first rejection port 13, and some of the heavy debris falls onto the filter screen 21. Since the filter screen 21 is tilted, the filter screen 21 has a low end and a high end. The low end of the filter screen 21 is located at the first rejection port 13, which is conducive to guiding the heavy debris blocked and intercepted on the filter screen 21 to the first rejection port 13, so as to remove the heavy debris in the tobacco leaves. This process does not require manual participation, has a high degree of automation, and has a high debris cleaning efficiency. In addition, the filter screen 21 is arranged obliquely in front of the air inlet 12 , and also has the function of blocking heavy debris from passing through the air inlet 12 and reaching the wind conveying device 7 .

[0048] The embodiment of the present invention can prevent the impurities from entering the shredding equipment along with the tobacco leaves and causing damage to the shredding equipment by removing impurities from the tobacco leaves during the tobacco leaf pretreatment process.

[0049] refer to Figure 1 In some embodiments, the tobacco pretreatment system further includes a wind conveying device 7 , the outlet of the wind conveying device 7 is connected to the air inlet 12 , and the wind conveying device 7 is used to provide airflow into the channel 1 .

[0050] In some embodiments, the wind conveying device 7 includes a fan. The wind conveying device 7 uses the process airflow generated by the fan to convey the tobacco leaf material. At the same time, the initial loosening and cleaning of the tobacco leaf can be achieved by adjusting the flow rate and direction of the process air.

[0051] In some embodiments, the fan has a variable frequency speed regulation function.

[0052] In some embodiments, a feed air lock is provided at the feed port 11. Optionally, the number of feed ports 11 is one or more, and each feed port 11 is provided with a feed air lock, which can maintain the stability of the pressure and process air flow in the channel 1 while quantitatively receiving tobacco leaf materials.

[0053] refer to Figure 2 In some embodiments, the first rejection device 2 includes a vibrator 22 , which is connected to the filter screen 21 , and the vibrator 22 is configured to drive the filter screen 21 to vibrate so that the heavy debris on the filter screen 21 falls to the first rejection port 13 .

[0054] In some embodiments, the filter screen 21 has a certain angle with the horizontal plane and is connected to the vibrator 22. The inclined setting of the filter screen 21 is beneficial to guiding the heavy debris on the filter screen 21 to the first rejection port 13, and combined with the vibration force provided by the vibrator 22, the filter screen 21 vibrates, which is more conducive to the heavy debris on the filter screen 21 falling off.

[0055] refer to Figure 1 and Figure 3 In some embodiments, the tobacco pretreatment system further includes a second rejection device 3, the second rejection device 3 includes a cyclone dust collector 31, the inlet of the cyclone dust collector 31 is connected to the channel 1, and the cyclone dust collector 31 is configured to remove fine debris from the tobacco leaves.

[0056] In the above embodiment, the cyclone dust collector 31 utilizes the characteristics that the fine debris and tobacco materials have different gravity and centrifugal force to screen and remove the fine debris. The fine debris includes plastic pieces or paper pieces.

[0057] In some embodiments, the second rejecting device 3 further includes a debris collecting groove 32 , the debris outlet of the cyclone dust collector 31 is connected to the debris collecting groove 32 , and the outlet of the cyclone dust collector 31 is connected to the channel 1 .

[0058] In the above embodiment, the inlet of the cyclone dust collector 31 is connected to the channel 1, the cyclone dust collector 31 can collect fine impurities in the tobacco leaves in the channel 1, and the fine impurities are discharged to the impurity collecting tank 32 through the impurity outlet, and the outlet of the cyclone dust collector 31 is connected to the channel 1, and the airflow can be returned to the channel 1, which is conducive to maintaining the pressure and process air flow in the channel 1. Optionally, the connection point between the outlet of the cyclone dust collector 31 and the channel 1 is located downstream of the connection point between the inlet of the cyclone dust collector 31 and the channel 1.

[0059] refer to Figure 1 and Figure 4 In some embodiments, the tobacco preprocessing system further includes a third rejection device 4, which includes an image acquisition component 41 and a jet component 42. The image acquisition component 41 is configured to acquire images of tobacco leaves for analyzing whether there are non-tobacco debris in the tobacco leaves, and the jet component 42 is configured to provide an airflow to blow away non-tobacco debris in the tobacco leaves.

[0060] In the above embodiment, the third rejecting device 4 is used to identify and reject non-tobacco debris in the tobacco material by image recognition technology. The non-tobacco debris includes plastic pieces or metal particles.

[0061] In some embodiments, the channel 1 is further provided with a second rejection port 14, which is provided below the air injection member 42 and is configured to collect and discharge non-tobacco debris.

[0062] In the above embodiment, the image acquisition component 41 acquires images of tobacco leaves for analyzing whether there are non-tobacco debris in the tobacco leaves. When it is determined that there are non-tobacco debris in the tobacco leaves, the jet component 42 provides an airflow to blow away the non-tobacco debris in the tobacco leaves, and blows the non-tobacco debris toward the second rejection port 14 and discharges them through the second rejection port 14.

[0063] In some embodiments, an air lock is also provided at the second reject port 14 to maintain the pressure and air flow in the channel 1 .

[0064] In some embodiments, the third rejecting device 4 further includes a light source 43, and the light source 43 is used to illuminate the tobacco leaves.

[0065] In the above embodiment, the light source 43 is directed toward the tobacco leaves to improve the clarity of the image captured by the image capturing component 41 .

[0066] In some embodiments, the image acquisition component 41 includes an industrial camera.

[0067] In some embodiments, the air injection member 42 includes an air pressure nozzle.

[0068] In some embodiments, the light source 43 includes an LED array.

[0069] In the above embodiment, whether to start the air pressure nozzle is determined based on the recognition feedback result of the industrial camera on the non-tobacco debris under the illumination of the LED lamp array, so as to remove the non-tobacco debris in the tobacco material. This process can be achieved by setting a controller.

[0070] In some embodiments, the image acquisition component 41 is disposed upstream of the air jet component 42, the second rejection port 14 is located below the air jet component 42, and light sources 43 can be disposed on both sides of the image acquisition component 41 located upstream and downstream.

[0071] refer to Figure 1 and Figure 5 In some embodiments, the tobacco pretreatment system further includes a moisture regeneration device 5, which is disposed in the channel 1. Along the flow direction of the tobacco leaves in the channel 1, the moisture regeneration device 5 is located downstream of the air inlet 12 and the feed port 11. The moisture regeneration device 5 includes a spray element 51, which is configured to humidify the channel 1.

[0072] In the above embodiment, the moisture reconditioning device 5 adjusts the moisture content of the tobacco leaf material by adjusting the moisture content of the process air in the channel 1, thereby achieving moisture reconditioning and humidification of the tobacco leaf material.

[0073] In some embodiments, the moisture recovery device 5 further includes a temperature detection element 52 and a humidity detection element 53. The temperature detection element 52 and the humidity detection element 53 are configured to detect the temperature and humidity in the channel 1 to control the spray amount of the spray element 51.

[0074] In some embodiments, the data collected by the temperature detection element 52 and the humidity detection element 53 are used to determine and then control the spray flow rate of the spray element 51, thereby achieving the purpose of adjusting the moisture content of the tobacco material. This process can be achieved by setting a controller.

[0075] In some embodiments, the temperature sensing element 52 and the humidity sensing element 53 are located upstream of the spray element 51 .

[0076] refer to Figure 1 and Figure 6 In some embodiments, the tobacco pretreatment system further includes a loosening device 6, which is disposed in the channel 1 and downstream of the rehumidification device 5. The loosening device 6 includes two rollers 61 arranged opposite to each other, and the two rollers 61 are configured to rotate to loosen the tobacco leaves.

[0077] In the above embodiment, two rollers 61 are arranged opposite to each other in the channel 1, and tobacco leaves pass between the two rollers 61. The two rollers 61 rotate to loosen the tobacco leaves. The two rollers 61 are arranged opposite to each other, and the flow speed of the tobacco leaves accompanied by the process wind can be increased by reducing the working diameter in the channel 1, forming a partial vacuum, further loosening the tobacco leaves, and separating the tobacco leaves from impurities and debris.

[0078] In some embodiments, the loosening device 6 further includes a motor, which is driven and connected to the roller 61. The roller 61 is driven to rotate by the motor to assist the process air in conveying the material.

[0079] In some embodiments, the loosening device 6 further includes a traction arm 62 . The traction arm 62 is movably disposed on the inner wall of the channel 1 , and the roller 61 is disposed on the traction arm 62 . The traction arm 62 is configured to drive the roller 61 to move so as to adjust the distance between the two rollers 61 .

[0080] In some embodiments, the loosening device 6 also includes a photoelectric sensor, which is configured to detect the amount of tobacco leaves passing through, so as to control the movement of the traction arm 62, and then adjust the distance between the two rollers 61 to change the working diameter, adjust the process air and tobacco material flow and the local vacuum degree of the device.

[0081] In some embodiments, the photoelectric sensor is located upstream of the paddle roller 61 .

[0082] In some embodiments, the channel 1 is further provided with a discharge port 15 , and the discharge port 15 is configured to discharge the pre-treated tobacco leaves in the channel 1 .

[0083] In some embodiments, the channel 1 is further provided with an air outlet 16 . The tobacco pretreatment system further comprises a wind conveying device 7 , the outlet of which is connected to the air inlet 12 , and the inlet of which is connected to the air outlet 16 .

[0084] In the above embodiment, the outlet of the wind conveying device 7 is connected to the air inlet 12, and the inlet of the wind conveying device 7 is connected to the air outlet 16, which can form a relatively closed environment in the channel 1, which is conducive to maintaining the stability of the pressure and process air flow in the channel 1.

[0085] In some embodiments, the channel 1 may be provided with one or more air outlets 16, each of which is provided with a discharge air lock, which can ensure the stability of the pressure and process air flow in the system while removing tobacco materials or debris.

[0086] In some embodiments, air locks are respectively provided at the feed port 11 , the first reject port 13 , the discharge port 15 and the second reject port 14 to stabilize the pressure and process air flow in the channel 1 .

[0087] In some embodiments, the tobacco pretreatment system also includes a controller, which can be electrically connected to the vibrator 22, the cyclone dust collector 31, the image acquisition component 41, the jet component 42, the light source 43, the spray component 51, the temperature detection element 52, the humidity detection element 53, the traction arm 62, the photoelectric sensor 63 and the wind conveying device 7, etc.

[0088] The controller is used to control the working state of each component, and can receive data signals sent by the image acquisition component 41, the temperature detection element 52, the humidity detection element 53, the photoelectric sensor 63, etc., and can control the working state of related components according to the data signals.

[0089] In some specific embodiments, the tobacco leaf pretreatment system includes a channel 1, a first rejecting device 2, a second rejecting device 3, a third rejecting device 4, a moisture conditioning device 5, a loosening device 6 and a wind conveying device 7.

[0090] The channel 1 is provided with a feed port 11, an air inlet 12, a first reject port 13, a second reject port 14, a discharge port 15 and an air outlet 16. Air locks are provided at the feed port 11, the first reject port 13, the discharge port 15 and the second reject port 14, respectively.

[0091] The outlet of the wind conveying device 7 is connected to the air inlet 12 of the channel 1, and the outlet of the wind conveying device 7 is connected to the air outlet 16 of the channel. The wind conveying device 7 provides power to circulate the airflow in the channel 1 to transport the tobacco leaves.

[0092] Tobacco leaves are fed into the channel 1 from the feed port 11. Along the conveying direction of the tobacco leaves in the channel 1, a first rejecting device 2, a moisture reconditioning device 5, a loosening device 6, a second rejecting device 3 and a third rejecting device 4 are sequentially arranged to pre-treat the tobacco leaves, and the pre-treated tobacco leaves are discharged from the discharge port 15.

[0093] The channel 1 includes a vertical extension section and a horizontal extension section, and the horizontal extension section is connected to the top of the vertical extension section. The first rejection device 2 is located at the bottom of the vertical extension section of the channel 1, and the moisture regaining device 5, the loosening device 6 and the second rejection device 3 are arranged in sequence above the first rejection device 2, and the second rejection device 3 is also located in the horizontal extension section. The third rejection device 4 is located in the horizontal extension section and is located downstream of the second rejection device 3.

[0094] In some embodiments, the tobacco pretreatment system works as follows:

[0095] The tobacco leaf material to be processed is uniformly fed into the channel 1 through the feed air lock of the feed port 11;

[0096] The heavy impurities in the tobacco leaf material are removed by the first removal device 2;

[0097] The tobacco leaf material is transported by the wind conveying device 7, and preliminary loosening and cleaning are performed at the same time;

[0098] The moisture content of the tobacco leaf material is detected and adjusted by the moisture conditioning device 5;

[0099] The tobacco leaf material is further loosened by the loosening device 6 to separate fine impurities;

[0100] The second rejecting device 3 removes fine impurities from the tobacco leaves;

[0101] The third rejecting device 4 identifies and rejects non-tobacco debris in the tobacco material;

[0102] The processed tobacco leaf material is sent out through the discharge air lock of the discharge port 15.

[0103] The tobacco pretreatment system provided in the embodiment of the present invention uses three removal devices. During the tobacco pretreatment process, it is possible to effectively remove heavy debris, fine debris, and non-tobacco debris mixed in the tobacco leaves without the need for human intervention. It has a high degree of automation and a high efficiency in debris removal, and can prevent debris from entering the shredding equipment and causing damage to the shredding equipment.

[0104] The tobacco pretreatment system provided in the embodiment of the present invention has at least the following three working modes.

[0105] Feeding mode:

[0106] During normal material transfer, the rehumidification device 5 and the rejection devices are not enabled. After the tobacco material to be processed enters the channel 1 through the feed air lock, the wind conveying device 7 runs at full speed to convey, loosen and clean the tobacco material through process air. The loosening device 6 further loosens and assists in conveying the tobacco material. The tobacco material is sent out from the discharge air lock and enters the downstream production process.

[0107] Cleaning mode:

[0108] The rehumidification device 5 is not enabled. After the tobacco material to be processed enters the channel 1 through the feed air lock, the wind conveying device 7 is operated at a controlled speed to convey, loosen and clean the tobacco material through process wind. The first rejection device 2 separates and removes the heavy debris by its own gravity. The loosening device 6 further loosens and assists in conveying the tobacco material. The second rejection device 3 utilizes the centrifugal force on the fine debris itself, which is different from that on the tobacco, and removes the fine debris from the tobacco in layers through the cyclone dust collector 31. The third rejection device 4 uses image recognition to screen and remove non-tobacco debris. The processed tobacco material is sent out from the discharge air lock and enters the downstream production process.

[0109] Moisture Retention and Impurity Removal Mode:

[0110] After the tobacco material to be processed enters the channel 1 through the feed air lock, the wind conveying device 7 is operated at a speed-adjusted manner to convey, loosen and clean the tobacco material through process wind. The first removal device 2 separates and removes the heavy debris by its own gravity. The rehumidification device 5 detects and adjusts the moisture content of the tobacco material. The loosening device 6 further loosens and assists in conveying the tobacco material. The second removal device 3 utilizes the centrifugal force on the fine debris itself, which is different from that on the tobacco, and removes the fine debris from the tobacco in layers through the cyclone dust collector 31. The third removal device 4 uses image recognition to screen and remove non-tobacco debris. The processed tobacco material is sent out from the discharge air lock and enters the downstream production process.

[0111] The tobacco leaf pretreatment system provided in the embodiment of the present invention adopts a pretreatment method of intelligent air delivery and debris removal in the leaf heating and humidification process to solve several problems existing in the tobacco leaf pretreatment before shredding in the related art (such as direct steam injection causing tobacco leaves to stick to the wall, loose materials in the drum increasing the crushing rate, and lack of an intelligent debris removal system, etc.), so as to improve the processing quality and production efficiency of tobacco leaves and reduce waste and operational risks.

[0112] Based on the above-mentioned embodiments of the present invention, in the absence of explicit negation or conflict, the technical features of one embodiment may be beneficially combined with one or more other embodiments.

[0113] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A tobacco leaf pretreatment system, characterized in that: include: A channel (1) is provided with a feed inlet (11), an air inlet (12) and a first rejection port (13); the feed inlet (11) is configured to feed tobacco leaves into the channel (1); the air inlet (12) is located below the feed inlet (11) and is configured to provide airflow into the channel (1) to blow the tobacco leaves along the channel (1); the first rejection port (13) is located below the feed inlet (11) and the air inlet (12) and is configured to discharge heavy impurities in the tobacco leaves; and The first rejecting device (2) comprises a filter screen (21), the filter screen (21) being arranged obliquely in front of the air inlet (12), the lower end of the filter screen (21) being located at the first rejecting port (13), the filter screen (21) being configured to block heavy debris from entering the air inlet (12) and to guide the heavy debris to the first rejecting port (13).

2. The tobacco leaf pretreatment system according to claim 1, characterized in that: The first rejection device (2) comprises a vibrator (22), the vibrator (22) being connected to the filter screen (21), the vibrator (22) being configured to drive the filter screen (21) to vibrate so that heavy debris on the filter screen (21) falls to the first rejection port (13).

3. The tobacco leaf pretreatment system according to claim 1, characterized in that: It also comprises a second rejecting device (3), the second rejecting device (3) comprising a cyclone dust collector (31), the inlet of the cyclone dust collector (31) being in communication with the channel (1), and the cyclone dust collector (31) being configured to remove fine impurities in the tobacco leaves.

4. The tobacco leaf pretreatment system according to claim 3, characterized in that: The second rejecting device (3) further comprises a debris collecting groove (32), the debris outlet of the cyclone dust collector (31) is in communication with the debris collecting groove (32), and the outlet of the cyclone dust collector (31) is in communication with the channel (1).

5. The tobacco leaf pretreatment system according to claim 1, characterized in that: The invention also comprises a third rejection device (4), the third rejection device (4) comprising an image acquisition component (41) and an air jet component (42), the image acquisition component (41) being configured to acquire images of tobacco leaves for analyzing whether the tobacco leaves contain non-tobacco debris, and the air jet component (42) being configured to provide an airflow to blow away the non-tobacco debris in the tobacco leaves.

6. The tobacco leaf pretreatment system according to claim 5, characterized in that: The channel (1) is further provided with a second rejection port (14), the second rejection port (14) being provided below the air jet component (42) and configured to collect and discharge the non-tobacco leaf debris.

7. The tobacco leaf pretreatment system according to claim 5, characterized in that: The third rejection device (4) further comprises a light source (43), wherein the light source (43) illuminates the tobacco leaves.

8. The tobacco leaf pretreatment system according to claim 1, characterized in that: The invention also comprises a moisture regeneration device (5), wherein the moisture regeneration device (5) is arranged in the channel (1), and along the flow direction of the tobacco leaves in the channel (1), the moisture regeneration device (5) is located downstream of the air inlet (12) and the feed inlet (11), and the moisture regeneration device (5) comprises a spray element (51), and the spray element (51) is configured to humidify the channel (1).

9. The tobacco leaf pretreatment system according to claim 8, characterized in that: The moisture recovery device (5) further comprises a temperature detection element (52) and a humidity detection element (53), wherein the temperature detection element (52) and the humidity detection element (53) are configured to detect the temperature and humidity in the channel (1) so as to control the spray amount of the spray element (51).

10. The tobacco leaf pretreatment system according to claim 8, characterized in that: It also comprises a loosening device (6), the loosening device (6) being arranged in the channel (1) and located downstream of the rehumidification device (5), the loosening device (6) comprising two rollers (61) arranged opposite to each other, the two rollers (61) being configured to rotate to loosen the tobacco leaves.

11. The tobacco leaf pretreatment system according to claim 10, characterized in that: The loosening device (6) further comprises a traction arm (62), the traction arm (62) being movably arranged on the inner wall of the channel (1), the roller (61) being arranged on the traction arm (62), and the traction arm (62) being configured to drive the roller (61) to move so as to adjust the distance between the two rollers (61).

12. The tobacco leaf pretreatment system according to claim 1, characterized in that: The channel (1) is also provided with a material discharge port (15) and an air outlet (16); the material discharge port (15) is configured to discharge pretreated tobacco leaves in the channel (1); the tobacco leaf pretreatment system further comprises a wind conveying device (7); the outlet of the wind conveying device (7) is connected to the air inlet (12); and the inlet of the wind conveying device (7) is connected to the air outlet (16).

13. The tobacco leaf pretreatment system according to claim 12, characterized in that: Air locks are respectively provided at the feed port (11), the first rejection port (13) and the discharge port (15).

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