System and method for unblocking dried cut tobacco and removing stem slivers in cut tobacco

Abstract

The invention discloses a system and a method for unblocking dried cut tobacco and removing stem slivers in the cut tobacco, and belongs to the technical field of tobacco processing. The system comprises a tobacco shred uniform spreading module, a before-winnowing tobacco shred unclustering module, a winnowing box body, a first-stage winnowing channel, a second-stage winnowing channel parallel to the first-stage winnowing channel, an air supply mechanism, a third air port pipeline used for connecting the winnowing box body with the air supply mechanism, and a first air port pipeline used for connecting the first-stage winnowing channel with the air supply mechanism, the first air port pipeline is used for connecting the first-stage winnowing channel with the air supply mechanism, the second air port pipeline is used for connecting the second-stage winnowing channel with the air supply mechanism, the winnowing mode switching module is arranged between the first-stage winnowing channel and the second-stage winnowing channel, and the first conveying and discharging mechanism is arranged in the winnowing box body. And the second conveying and discharging mechanism is arranged at the discharging end of the first-stage winnowing channel and the discharging end of the second-stage winnowing channel. The technical problem that in the prior art, when tobacco shreds needed by thin cigarettes are produced, the stem sliver removal rate cannot meet the technological requirement can be solved.

Description

Technical Field

[0001] The invention belongs to the technical field of tobacco processing, and relates to a system and method for deagglomerating tobacco shreds after drying and removing stems from tobacco shreds. Background Art

[0002] According to the cigarette production process, the tobacco formula required for cigarettes mainly includes leaf shreds, thin shreds, stem shreds, expanded shreds and recycled shreds, among which leaf shreds account for the highest proportion. From the shred production process, it can be seen that the leaf shreds often contain a lot of entangled silk balls, wet balls and stem sticks after being dried in the drying process, which seriously affect the structure and quality of the leaf shreds. If the stem stick content in the tobacco formula required by the cigarette process is too high, it will affect the quality of the cigarette. For example, if the stem stick content is too high, the finished cigarette will run, and the cigarette will have crooked heads and popping during the burning process. The slim cigarettes that are currently popular on the market have higher requirements for the stem stick content in the tobacco shreds due to the special specifications and sizes. The process requires that the stem stick content in the leaf shreds is very low.

[0003] At present, the traditional air separator is used for post-drying air separation on the silk production line. When producing the leaf shreds required for traditional thick cigarettes, the stem removal rate can meet the process requirements, but when producing the leaf shreds required for thin cigarettes, the stem removal rate cannot meet the process requirements. Therefore, a system and method for de-agglomerating the leaf shreds after drying and removing the stems in the leaf shreds is urgently needed to solve the above technical problems. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a system and method for deagglomerating dried leaf shreds and removing stems from leaf shreds, which can solve the technical problem in the prior art that the stem removal rate cannot meet the process requirements when producing leaf shreds required for slim cigarettes.

[0005] In order to alleviate the above technical problems, the present invention is implemented by adopting the following technical solutions: In a first aspect, the present invention provides a system for de-agglomerating dried leaf shreds and removing stems from the leaf shreds, comprising: A leaf shred evenly thinning module, a leaf shred deagglomerating module before air selection, an air selection box, a primary air selection channel, a secondary air selection channel parallel to the primary air selection channel, an air supply mechanism, a third air outlet duct for connecting the air selection box and the air supply mechanism, a first air outlet duct for connecting the primary air selection channel and the air supply mechanism, a second air outlet duct for connecting the secondary air selection channel and the air supply mechanism, an air selection mode switching module arranged between the primary air selection channel and the secondary air selection channel, a first conveying and discharging mechanism arranged in the air selection box, and a second conveying and discharging mechanism arranged at the discharging ends of the primary air selection channel and the secondary air selection channel; The outlet end of the blade filament uniform thinning module extends into the blade filament deagglomeration module before air selection, and the outlet end of the blade filament deagglomeration module before air selection extends into the air selection box.

[0006] Furthermore, the blade filament uniform thinning module includes a vibrating conveying plane, a material guide cone arranged at the inlet of the vibrating conveying plane, and a dovetail groove material guide plate arranged at the outlet of the vibrating conveying plane.

[0007] Furthermore, the wind selection front blade silk de-clumping module includes a loose box and a first needle roller and a second needle roller arranged in parallel in the loose box, the first needle roller and the second needle roller have opposite rotation directions, and loose pins for breaking up silk clusters are arrayed on the cylindrical surfaces of the first needle roller and the second needle roller.

[0008] Furthermore, the third air inlet duct is arranged directly below the front-blade silk de-agglomeration module of the air selection, and the third air inlet duct is arranged horizontally to ensure that the air inlet direction is horizontal. The first air inlet duct and the second air inlet duct are respectively arranged on both sides of the lower edge of the first-level air selection channel and the second-level air selection channel outlet, and the first air inlet duct and the second air inlet duct are arranged inclined upward with the horizontal plane as a reference.

[0009] Furthermore, the first-level air selection channel includes: A first baffle connected to the air separation box, a first upper silk group loosening module arranged along the direction of blade silk conveying, and a first lower silk group loosening module having a height difference with the first upper silk group loosening module; the secondary air separation channel includes: a second baffle connected to the air separation box, a second upper silk group loosening module arranged along the direction of blade silk conveying, and a second lower silk group loosening module having a height difference with the second upper silk group loosening module; The first baffle and the second baffle are arranged in parallel to limit the movement range of the blades in the primary air selection channel and the secondary air selection channel; The first upper silk group loosening module, the first lower silk group loosening module, the second upper silk group loosening module and the second lower silk group loosening module have the same structure; The first upper silk ball loosening module includes a first roller and a second roller arranged below the first roller, the diameter of the first roller is smaller than the diameter of the second roller, the rotation speed of the first roller is greater than the rotation speed of the second roller, and the first roller and the second roller are integrated with densely arranged loosening nails, and the loosening nails are in a needle-shaped structure.

[0010] Furthermore, the winnowing mode switching module includes: A partition plate arranged between the primary air selection channel and the secondary air selection channel, a lifting cylinder arranged in the partition plate, a telescopic plate connected to the output end of the lifting cylinder, a bracket connected to the telescopic plate, and a material-elevating roller connected to the bracket; The upper edge of the partition plate is in an arc shape, which is used to prevent material accumulation on the partition plate during the conveying of the blade shreds.

[0011] Furthermore, the air supply mechanism comprises: A fan and a four-branched pipe sealedly connected to the fan outlet, the third outlet pipe of the four-branched pipe is sealedly connected to the third air outlet pipe, and is used to provide lateral air intake for the air selection box, the first outlet pipe of the four-branched pipe is connected to the first air outlet pipe, and is used to provide side and lower air intake for the primary air selection channel, and the second outlet pipe of the four-branched pipe is connected to the second air outlet pipe, and is used to provide side and lower air intake for the secondary air selection channel; A third damper is installed in the third outlet pipe, a first damper is installed in the first outlet pipe, and a second damper is installed in the second outlet pipe.

[0012] Furthermore, a dust removal mechanism is also included, and the dust removal mechanism includes: A dust removal box connected to the air separation box, a dust removal pipe connected to the dust removal box for conveying dust-laden gas to a dust removal room, and a dust removal damper arranged in the dust removal pipe.

[0013] Furthermore, the first conveying and discharging mechanism comprises: A first conveyor arranged inside the air separation box, a discharge air lock arranged at the output end of the first conveyor, and a second conveyor arranged at the outlet end of the discharge air lock, wherein the discharge air lock is used to discharge the air-selected shreds out of the air separation box and prevent air from leaking in; The second conveying and discharging mechanism includes: a third conveyor arranged at the discharging ends of the primary air selection channel and the secondary air selection channel, and a material receiving box arranged at the output end of the third conveyor.

[0014] In a second aspect, the present invention provides a method for de-agglomerating leaf shreds after drying and removing stems from the leaf shreds, comprising: The dried shredded leaves are transported to the shredded leaves uniform thinning module for uniform thinning, and the treated shredded leaves are transported to the shredded leaves pre-pneumatic separation module for preliminary breaking up of the shredded leaves, and the preliminary broken shredded leaves fall freely into the pneumatic separation box; When producing traditional thick cigarettes, the air selection mode switching module is controlled to switch to the first-level air selection mode, the lifting cylinder is extended, the telescopic plate and the material ejecting roller move downward, and the material ejecting roller is in a stopped state; The third air door is controlled to adjust the air supply volume. Under the action of horizontal blowing, a% of the leaf filaments float into the primary air selection channel, b% of the leaf filaments float into the secondary air selection channel, and a% of the leaf filaments are in the primary air selection channel. The first air door is controlled to adjust the air volume of the first air outlet duct to complete the leaf filament flotation process. The shredded leaves after passing through the air selection channel are transported to the next stage through the first conveying and discharging mechanism, and the stems and sticks removed through the primary and secondary air selection channels are collected through the second conveying and discharging mechanism. When producing slim cigarettes, the air selection mode switching module is controlled to switch to the secondary air selection mode, the lifting cylinder is retracted, the telescopic plate and the ejecting roller move upward, and the ejecting roller is in a high-speed operation state, for ejecting the shredded leaves blown through the first air outlet pipe to the secondary air selection channel; The third air gate is controlled to adjust the air supply volume. Under the action of lateral blowing, c% of the leaf filaments are selected to enter the primary air selection channel, and d% of the leaf filaments are selected to enter the secondary air selection channel. The c% of the leaf filaments are in the primary air selection channel. The first air gate is controlled to adjust the air volume of the first air outlet duct to complete the leaf filament flotation process. The e% of the leaf filaments that have completed the flotation process in the primary air selection channel are transported to the secondary air selection channel under the action of the side lower air inlet provided by the first air outlet duct and the elastic roller. The d+e% of the leaf filaments are in the secondary air selection channel. The second air gate is controlled to adjust the air volume of the second air outlet duct to complete the leaf filament flotation process. The shredded leaves after passing through the air selection channel are transported to the next stage through the first conveying and discharging mechanism, and the stems and sticks removed through the primary and secondary air selection channels are collected through the second conveying and discharging mechanism. Among them, a%+b%=100%, a is greater than b, c%+d%=100%, c is greater than or equal to e, and the leaf shreds can enter the wind selection channel multiple times to complete the leaf shred flotation process.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention can simultaneously meet the different process requirements of stem removal rates for traditional thick cigarettes and new thin cigarettes by switching between two air selection modes. The primary air selection channel and the secondary air selection channel are arranged in parallel. When producing traditional thick cigarette leaf raw materials, the primary air selection operation mode is switched to; when producing thin cigarettes and other types of cigarettes with very low stem content, the two-stage air selection operation mode is switched to reduce the stem content in the finished cigarettes when producing the leaf required for thin cigarettes; BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of a system for de-agglomerating dried leaf shreds and removing stems from leaf shreds provided in the first embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of a leaf shreds uniformly thinning module in a system for de-agglomerating leaf shreds after drying and removing stems from leaf shreds provided in the first embodiment of the present invention; Figure 3 It is a schematic diagram of the structure of a leaf silk deagglomeration module before air selection in a system for deagglomerating leaf silk after drying and removing stems from leaf silk provided in the first embodiment of the present invention; Figure 4 It is a structural schematic diagram of a wind selection mode switching module in a system for de-agglomerating leaf shreds after drying and removing stems from leaf shreds provided in the first embodiment of the present invention; Figure 5 It is a structural schematic diagram of the first upper silk group loosening module in a system for de-clustering and removing stems of dried silk leaves provided in the first embodiment of the present invention; Figure 6 A schematic diagram of the working process of a method for deagglomerating dried leaf shreds and removing stems from leaf shreds in a first-level air selection mode provided in the second embodiment of the present invention; Figure 7 This is a schematic diagram of the working process in the secondary air selection mode of a method for de-agglomerating leaf shreds after drying and removing stems from leaf shreds provided in the second embodiment of the present invention.

[0017] Figures: 1. Air separation box; 2. Leaf silk uniform thinning module; 3. Leaf silk de-agglomeration module before air separation; 4. Third air outlet duct; 5. Primary air separation channel; 6. Secondary air separation channel; 7. Air separation mode switching module; 8. Fan; 9. Four-forked duct; 10. First conveyor; 11. Discharge air lock; 12. Second conveyor; 13. Third conveyor; 14. Material receiving box; 15. Dust removal mechanism; 21. Vibrating conveying plane; 22. Material guide cone; 23. Dovetail groove material guide plate; 31. Loose box; 32. First needle roller; 33. Second needle roller; 51. First baffle; 52. First Upper silk ball loosening module; 53, first lower silk ball loosening module; 54, first air outlet duct; 61, second baffle; 62, second upper silk ball loosening module; 63, second lower silk ball loosening module; 64, second air outlet duct; 71, partition plate; 72, lifting cylinder; 73, telescopic plate; 74, bracket; 75, material spring roller; 92, third outlet duct; 93, third air gate; 94, first outlet duct; 95, first air gate; 96, second outlet duct; 97, second air gate; 151, dust removal box; 152, dust removal air gate; 521, first rotating roller; 522, second rotating roller. DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0019] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0021] Damper: Damper is a valve used to control the flow of gas, commonly used in industries, construction and other fields. It mainly adjusts the flow and pressure of gas by changing the cross-sectional area of ​​gas in the pipeline, thereby achieving control and management of gas. Embodiment 1:

[0022] like Figures 1 to 5 As shown, this embodiment provides a system for deagglomerating leaf shreds after drying and removing stems from leaf shreds, comprising: A leaf shred evenly thinning module 2, a leaf shred deagglomerating module 3 before air selection, an air selection box 1, a primary air selection channel 5, a secondary air selection channel 6 parallel to the primary air selection channel 5, an air supply mechanism, a third air outlet duct 4 for connecting the air selection box 1 and the air supply mechanism, a first air outlet duct 54 for connecting the primary air selection channel 5 and the air supply mechanism, a second air outlet duct 64 for connecting the secondary air selection channel 6 and the air supply mechanism, an air selection mode switching module 7 arranged between the primary air selection channel 5 and the secondary air selection channel 6, a first conveying and discharging mechanism arranged in the air selection box 1, and a second conveying and discharging mechanism arranged at the discharging ends of the primary air selection channel 5 and the secondary air selection channel 6; The outlet end of the blade shred evenly thinning module 2 extends into the blade shred deagglomerating module 3 before air selection, and the outlet end of the blade shred deagglomerating module 3 before air selection extends into the air selection box 1.

[0023] Wherein, the blade shreds uniformly thinning module 2 comprises a vibrating conveying plane 21, a guide cone 22 arranged at the entrance of the vibrating conveying plane 21 and a dovetail groove guide plate 23 arranged at the exit of the vibrating conveying plane 21; the guide cone 22 is connected to the vibrating conveying plane 21 by welding, and the bottom circular area and height dimensions of the guide cone 22 need to match the width dimensions of the vibrating conveying plane 21, so as to thin the blade shreds delivered to the vibrating conveying plane 21; in the present embodiment, there are three dovetail groove guide plates 23, and the sizes are slightly different, which need to match the width dimensions of the vibrating conveying plane 21, and they are connected to the vibrating conveying plane 21 by welding, and the dovetail groove guide plates 23 are used to further thin the blade shreds delivered to the vibrating conveying plane 21; about the attached Figure 2 The guide cone 22 appears in the drawing. In the present embodiment, the guide cone 22 is in the shape of a cone arranged on the vibrating conveying plane 21, wherein the bottom surface of the cone is completely in contact with the vibrating conveying plane 21.

[0024] Among them, the pre-air selection leaf silk deagglomeration module 3 is located directly below the silk group discharge port, and is used for re-loosening the silk groups that have been preliminarily loosened to obtain qualified free leaf silks. The pre-air selection leaf silk deagglomeration module 3 includes a loosening box 31 and a first needle roller 32 and a second needle roller 33 arranged in parallel in the loosening box 31, the first needle roller 32 and the second needle roller 33 have opposite directions, and the cylindrical surfaces of the first needle roller 32 and the second needle roller 33 are arrayed with loosening pins for loosening the silk groups; the silk groups that have been thinned and preliminarily loosened by the leaf silk uniform thinning module 2 enter between the first needle roller 32 and the second needle roller 33 through the right side feed port of the loosening box 31, and are loosened again by the loosening pins on the two needle rollers. The pre-air selection leaf silk deagglomeration module 3 relies on the reverse operation of the two needle rollers, the speed difference, and the different arrangement, density and shape of the loose pins on the needle rollers to achieve the leaf silk deagglomeration function.

[0025] Specifically, the third air inlet duct 4 is arranged directly below the front-blade silk de-agglomeration module 3 of the air selection, and the third air inlet duct 4 is arranged horizontally to ensure that the air inlet direction is horizontal. The first air inlet duct 54 and the second air inlet duct 64 are respectively arranged on both sides of the lower edge of the discharge port of the first-level air selection channel 5 and the second-level air selection channel 6, and the first air inlet duct 54 and the second air inlet duct 64 are arranged inclined upward with the horizontal plane as the reference.

[0026] Wherein, the first-level air selection channel 5 includes: A first baffle 51 connected to the air separation box 1, a first upper silk group loosening module 52 arranged along the conveying direction of the blade silk, and a first lower silk group loosening module 53 having a height difference with the first upper silk group loosening module 52; the first upper silk group loosening module 52 and the first lower silk group loosening module 53 cooperate with each other, and with the help of the wind force of the first air outlet duct 54, the blade silk is repeatedly thrown up during the falling process in the primary air separation channel 5 to complete the flotation process; objects with low suspension speed such as blade silk are carried away by the air flow, and objects with high suspension speed such as stems slide out of the air separation box 1 along the primary air separation channel 5; The secondary air selection channel 6 comprises: a second baffle 61 connected to the air selection box 1, a second upper silk group loosening module 62 arranged along the conveying direction of the blade silk, and a second lower silk group loosening module 63 having a height difference with the second upper silk group loosening module 62; the second upper silk group loosening module 62 and the second lower silk group loosening module 63 cooperate with each other, and with the help of the wind force of the second air outlet duct 64, the blade silk is repeatedly thrown up during the falling process in the secondary air selection channel 6 to complete the flotation process; objects with low suspension speed such as blade silk are carried away by the air flow, and objects with high suspension speed such as stems slide out of the air selection box 1 along the secondary air selection channel 6; The first baffle 51 and the second baffle 61 are arranged in parallel to limit the movement range of the blades in the primary air selection channel 5 and the secondary air selection channel 6; The first upper silk group loosening module 52, the first lower silk group loosening module 53, the second upper silk group loosening module 62 and the second lower silk group loosening module 63 have the same structure; The first upper silk ball loosening module 52 includes a first roller 521 and a second roller 522 arranged below the first roller 521, the diameter of the first roller 521 is smaller than the diameter of the second roller 522, the diameter difference between the first roller 521 and the second roller 522 can be determined according to the size of the lumps and clusters, the rotation speed of the first roller 521 is greater than the rotation speed of the second roller 522, the rotation speed difference between the first roller 521 and the second roller 522 can be determined according to the loosening requirement of the leaf silk, and the first roller 521 and the second roller 522 are integrated with densely arranged loosening nails, and the loosening nails are needle-shaped structures.

[0027] Wherein, the winnowing mode switching module 7 comprises: A partition plate 71 arranged between the primary air selection channel 5 and the secondary air selection channel 6, a lifting cylinder 72 arranged in the partition plate 71, a telescopic plate 73 connected to the output end of the lifting cylinder 72, a bracket 74 connected to the telescopic plate 73, and a material-elasticating roller 75 connected to the bracket 74; The upper edge of the partition plate 71 is in an arc shape, which is used to prevent the accumulation of materials on the partition plate 71 during the conveying process of the leaf shreds. The thickness of the partition plate 71 gradually decreases from top to bottom, which is used to make it easier for objects with high suspension speed such as stalks to be separated from the air separation box 1; the roller needle of the elastic roller 75 is an arc structure. When the lifting cylinder 72 of the air selection mode switching module 7 is in a retracted state, the elastic roller 75 is in a running state, which is convenient for ejecting the leaf shreds blown through the first air outlet pipe 54 into the secondary air selection channel 6 to complete the multiple air selection processes of the leaf shreds. For the convenience of installation, the elastic roller 75 is a built-in motor structure, that is, the motor is integrated into the body of the elastic roller 75. The roller needles of the elastic roller 75 are evenly distributed on the arc surface of the roller shaft, and can be distributed in multiple groups. The gaps between adjacent roller needles in the same group are the same.

[0028] Wherein, the gas supply mechanism comprises: The fan 8 and the four-branched pipe 9 sealedly connected to the air outlet of the fan 8, the third outlet pipe 92 of the four-branched pipe 9 is sealedly connected to the third air outlet pipe 4, and is used to provide lateral air intake for the air selection box 1, the first outlet pipe 94 of the four-branched pipe 9 is connected to the first air outlet pipe 54, and is used to provide side and lower air intake for the primary air selection channel 5, and the second outlet pipe 96 of the four-branched pipe 9 is connected to the second air outlet pipe 64, and is used to provide side and lower air intake for the secondary air selection channel 6; A third damper 93 is installed in the third outlet duct 92, a first damper 95 is installed in the first outlet duct 94, and a second damper 97 is installed in the second outlet duct 96. In different air selection modes, the openings of the automatic dampers on the third outlet duct 92, the first outlet duct 94 and the third outlet duct 92 are different, and can be adjusted and controlled according to actual application conditions.

[0029] It also includes a dust removal mechanism 15, which includes: A dust removal box 151 connected to the air separation box 1, a dust removal pipe connected to the dust removal box 151 for conveying dust-containing gas to the dust removal room, and a dust removal damper 152 arranged in the dust removal pipe.

[0030] Specifically, the first conveying and discharging mechanism includes: A first conveyor 10 arranged in the air separation box 1, a discharge air lock 11 arranged at the output end of the first conveyor 10, and a second conveyor 12 arranged at the outlet end of the discharge air lock 11, wherein the discharge air lock 11 is used to discharge the air-selected shreds to the outside of the air separation box 1 and prevent air from leaking in, so that the system is relatively isolated from the atmosphere; The second conveying and discharging mechanism comprises: A third conveyor 13 is arranged at the discharge ends of the primary air selection channel 5 and the secondary air selection channel 6 , and a receiving box 14 is arranged at the output end of the third conveyor 13 . Embodiment 2:

[0031] like Figure 6 and Figure 7 As shown, the present invention provides a method for deagglomerating leaf shreds after drying and removing stems from leaf shreds, which can be performed by the system for deagglomerating leaf shreds after drying and removing stems from leaf shreds described in Example 1, and has the functional modules and beneficial effects of the system for deagglomerating leaf shreds after drying and removing stems from leaf shreds, and the method includes: The dried shredded leaves are transported to the shredded leaves uniform thinning module 2 for uniform thinning, and the treated shredded leaves are transported to the shredded leaves pre-pneumatic separation module 3 for preliminary breaking up of the shredded leaves, and the preliminary broken up shredded leaves fall freely to the pneumatic separation box 1; When producing traditional thick cigarettes, the air selection mode switching module 7 is controlled to switch to the primary air selection mode, the lifting cylinder 72 extends, the telescopic plate 73 and the material springing roller 75 move downward, and the material springing roller 75 is in a stopped state. At this time, the air selection mode switching module 7 plays a role of separating the primary air selection channel 5 and the secondary air selection channel 6, reducing the mutual interference between the primary air selection channel 5 and the secondary air selection channel 6, so that no interference occurs; The third air gate 93 is controlled to adjust the air supply volume. Under the effect of lateral blowing, a% of the leaf filaments float into the primary air selection channel 5, and b% of the leaf filaments float into the secondary air selection channel 6. When a% of the leaf filaments are in the primary air selection channel 5, the first air gate 95 is controlled to adjust the air volume of the first air outlet duct 54 to complete the leaf filament flotation process. During this process, the filaments in the leaf filaments are broken up, and objects with low suspension speeds such as leaf filaments are taken away by the air flow, while objects with high suspension speeds such as stems slide out of the air selection box 1 along the primary air selection channel 5; when b% of the leaf filaments are in the secondary air selection channel 6, the second air gate 97 is controlled to adjust the air volume of the second air outlet duct 64 to complete the leaf filament flotation process. During this process, the filaments in the leaf filaments are broken up, and objects with low suspension speeds such as leaf filaments are taken away by the air flow and can enter the primary air selection channel 5 to complete the air selection process again, while the stems slide out of the air selection box 1 along the primary air selection channel 5; The shredded leaves after passing through the air selection channel are transported to the next stage through the first conveying and discharging mechanism, and the impurities such as stems and wet clumps removed through the primary air selection channel 5 and the secondary air selection channel 6 are collected through the second conveying and discharging mechanism. When producing slim cigarettes, the air selection mode switching module 7 is controlled to switch to the secondary air selection mode, the lifting cylinder 72 is retracted, the telescopic plate 73 and the ejecting roller 75 move upward, and at this time, the lateral air inlet of the primary air selection channel 5 not only provides air volume for this channel, but also provides air volume for the secondary air selection channel 6, and the ejecting roller 75 is in a high-speed operation state, for ejecting the shredded leaves blown through the first air outlet pipe 54 to the secondary air selection channel 6; The third air door 93 is controlled to adjust the air supply volume. Under the effect of lateral blowing, c% of the leaf filaments float into the primary air selection channel 5, d% of the leaf filaments float into the secondary air selection channel 6, and c% of the leaf filaments are in the primary air selection channel 5. The first air door 95 is controlled to adjust the air volume of the first air outlet duct 54 to complete the leaf filament flotation process. During this process, the filaments in the leaf filaments are broken up, and objects with low suspension speed such as leaf filaments are carried away by the air flow, while objects with high suspension speed such as stems slide out of the air selection box 1 along the primary air selection channel 5 and are in the primary air selection channel 5. The e% of the leaf shreds that have completed the flotation process are transported to the secondary air selection channel 6 under the action of the lower side air inlet provided by the first air outlet duct 54 and the spring roller 75. The d+e% of the leaf shreds are in the secondary air selection channel 6, and the second air door 97 is controlled to adjust the air volume of the second air outlet duct 64 to complete the leaf shred flotation process. During this process, the shreds in the leaf shreds are broken up, and objects with low suspension speed such as leaf shreds are carried away by the air flow and can enter the primary air selection channel 5 to complete the air selection process again. The stems slide out of the air selection box 1 along the primary air selection channel 5. The shredded leaves after passing through the air selection channel are transported to the next stage through the first conveying and discharging mechanism, and the stem impurities removed through the primary air selection channel 5 and the secondary air selection channel 6 are collected through the second conveying and discharging mechanism. Among them, a%+b%=100%, a is much greater than b, c%+d%=100%, c is greater than or equal to e, and the leaf shreds can enter the air selection channel multiple times to complete the leaf shred flotation process. It should be noted that the 100% mentioned in this embodiment refers to the leaf shreds that have been treated after drying and are transported to the leaf shreds uniform thinning module 2 for uniform thinning treatment, and then transported to the leaf shreds pre-air selection deflocculant module 3 for preliminary breaking up of the leaf shreds. What is mainly emphasized here is that in the first-level air selection mode, by controlling the third air gate 93 to adjust the air supply volume, the leaf shreds entering the first-level air selection channel 5 can be much larger than the leaf shreds entering the second-level air selection channel 6. In addition, the leaf shreds that can enter the air selection channel multiple times refer to the "repeated throwing to complete the flotation process" mentioned in Example 1. When the flotation is completed, the control of the air gate can be adaptively changed according to the actual application scenario, which will not be repeated here.

[0032] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A system for de-agglomerating dried leaf shreds and removing stems from the leaf shreds, characterized in that: include: A leaf shred evenly spreading module (2), a leaf shred deagglomerating module (3) before air selection, an air selection box (1), a primary air selection channel (5), a secondary air selection channel (6) parallel to the primary air selection channel (5), an air supply mechanism, a third air outlet duct (4) for connecting the air selection box (1) and the air supply mechanism, a first air outlet duct (54) for connecting the primary air selection channel (5) and the air supply mechanism, a second air outlet duct (64) for connecting the secondary air selection channel (6) and the air supply mechanism, an air selection mode switching module (7) arranged between the primary air selection channel (5) and the secondary air selection channel (6), a first conveying and discharging mechanism arranged in the air selection box, and a second conveying and discharging mechanism arranged at the discharging ends of the primary air selection channel (5) and the secondary air selection channel (6); The outlet end of the blade shred evenly thinning module (2) extends into the blade shred deagglomerating module (3) before air selection, and the outlet end of the blade shred deagglomerating module (3) before air selection extends into the air selection box (1).

2. The system for de-agglomerating dried leaf shreds and removing stems from dried leaf shreds according to claim 1, characterized in that: The blade filament uniform thinning module (2) comprises a vibrating conveying plane (21), a material guide cone (22) arranged at the entrance of the vibrating conveying plane, and a dovetail groove material guide plate (23) arranged at the exit of the vibrating conveying plane (21).

3. The system for de-agglomerating and removing stems from dried leaf shreds according to claim 1, characterized in that: The wind-selected front-leaf silk de-agglomeration module (3) comprises a loose box (31) and a first needle roller (32) and a second needle roller (33) arranged in parallel in the loose box (31); the first needle roller (32) and the second needle roller (33) rotate in opposite directions; and loose pins for breaking up silk clusters are arrayed on the cylindrical surfaces of the first needle roller (32) and the second needle roller (33).

4. The system for de-agglomerating dried leaf shreds and removing stems from leaf shreds according to claim 1, characterized in that: The third air inlet duct (4) is arranged directly below the air selection front blade silk de-agglomeration module (3), and the third air inlet duct (4) is arranged horizontally to ensure that the air inlet direction is horizontal. The first air inlet duct (54) and the second air inlet duct (64) are arranged on both sides of the lower edge of the discharge port of the first air selection channel (5) and the second air selection channel (6), respectively. The first air inlet duct (54) and the second air inlet duct (64) are arranged upwardly inclined with the horizontal plane as a reference.

5. The system for de-agglomerating dried leaf shreds and removing stems from dried leaf shreds according to claim 1, characterized in that: The first-level air selection channel (5) comprises: A first baffle (51) connected to the wind selection box (1), a first upper silk group loosening module (52) arranged along the direction of conveying the silk filaments, and a first lower silk group loosening module (53) having a height difference with the first upper silk group loosening module (52); The secondary air selection channel (6) comprises: a second baffle (61) connected to the air selection box (1), a second upper silk group loosening module (62) arranged along the conveying direction of the leaf silk, and a second lower silk group loosening module (63) maintaining a height difference with the second upper silk group loosening module (62); the first baffle (51) and the second baffle (61) are arranged in parallel to limit the movement range of the leaf silk in the primary air selection channel (5) and the secondary air selection channel (6); The first upper silk group loosening module (52), the first lower silk group loosening module (53), the second upper silk group loosening module (62) and the second lower silk group loosening module (63) have the same structure; The first upper silk ball loosening module (52) comprises a first rotating roller (521) and a second rotating roller (522) arranged below the first rotating roller (521); the diameter of the first rotating roller (521) is smaller than the diameter of the second rotating roller (522); the rotation speed of the first rotating roller (521) is greater than the rotation speed of the second rotating roller (522); and densely arranged loosening pins are integrated on the first rotating roller (521) and the second rotating roller (522); the loosening pins are in a needle-shaped structure.

6. The system for de-agglomerating and removing stems from dried leaf shreds according to claim 1, characterized in that: The winnowing mode switching module (7) comprises: A partition plate (71) arranged between the primary air selection channel (5) and the secondary air selection channel (6), a lifting cylinder (72) arranged in the partition plate, a telescopic plate (73) connected to the output end of the lifting cylinder, a bracket (74) connected to the telescopic plate (73), and a material-elevating roller (75) connected to the bracket; The upper edge of the partition plate (71) is in an arc shape, which is used to prevent the blade shreds from being accumulated on the partition plate (71) during the conveying process.

7. The system for de-agglomerating dried leaf shreds and removing stems from dried leaf shreds according to claim 1, characterized in that: The gas supply mechanism comprises: A fan (8) and a four-branched pipe (9) sealedly connected to the air outlet of the fan (8), the third outlet pipe (92) of the four-branched pipe (9) being sealedly connected to the third air outlet pipe (4) for providing lateral air intake for the air selection box (1), the first outlet pipe (94) of the four-branched pipe (9) being connected to the first air outlet pipe (54) for providing side and lower air intake for the primary air selection channel (5), and the second outlet pipe (96) of the four-branched pipe (9) being connected to the second air outlet pipe (64) for providing side and lower air intake for the secondary air selection channel (6); A third damper (93) is installed in the third outlet pipe (92), a first damper (95) is installed in the first outlet pipe (94), and a second damper (97) is installed in the second outlet pipe (96).

8. The system for de-agglomerating and removing stems from dried leaf shreds according to claim 1, characterized in that: It also includes a dust removal mechanism (15), wherein the dust removal mechanism (15) includes: A dust removal box (151) connected to the air separation box (1), a dust removal pipe connected to the dust removal box (151) and used for conveying dust-containing gas to a dust removal room, and a dust removal damper (152) arranged in the dust removal pipe.

9. The system for de-agglomerating dried leaf shreds and removing stems from dried leaf shreds according to claim 1, characterized in that: The first conveying and discharging mechanism comprises: A first conveyor (10) arranged in the air separation box (1), a discharge air lock (11) arranged at the output end of the first conveyor (10), and a second conveyor (12) arranged at the outlet end of the discharge air lock (11), wherein the discharge air lock (11) is used to discharge the air-selected shreds to the outside of the air separation box (1) and prevent air from leaking in; The second conveying and discharging mechanism comprises: a third conveyor (13) arranged at the discharging ends of the primary air selection channel (5) and the secondary air selection channel (6), and a material receiving box (14) arranged at the output end of the third conveyor (13).

10. A method for de-agglomerating leaf shreds after drying and removing stems from the leaf shreds, characterized in that: include: The dried shredded leaves are conveyed to the shredded leaves uniform thinning module (2) for uniform thinning, the treated shredded leaves are conveyed to the shredded leaves pre-pneumatic separation module (3) for preliminary breaking up of the shredded leaves, and the preliminary broken up shredded leaves fall freely into the pneumatic separation box (1); When producing traditional thick cigarettes, the air selection mode switching module (7) is controlled to switch to the first-level air selection mode, the lifting cylinder (72) is extended, the telescopic plate (73) and the material ejecting roller (75) move downward, and the material ejecting roller (75) is in a stopped state; The third air gate (93) is controlled to adjust the air supply volume. Under the action of horizontal blowing, a% of the leaf filaments are selected to enter the primary air selection channel (5), and b% of the leaf filaments are selected to enter the secondary air selection channel (6). When a% of the leaf filaments are in the primary air selection channel (5), the first air gate (95) is controlled to adjust the air volume of the first air outlet duct (54), thereby completing the leaf filament flotation process; when b% of the leaf filaments are in the secondary air selection channel (6), the second air gate (97) is controlled to adjust the air volume of the second air outlet duct (64), thereby completing the leaf filament flotation process; The shredded leaves that have passed through the air selection channel are transported to the next stage through the first conveying and discharging mechanism, and the stems that have been removed through the primary air selection channel (5) and the secondary air selection channel (6) are collected through the second conveying and discharging mechanism; When producing slim cigarettes, the air selection mode switching module (7) is controlled to switch to the secondary air selection mode, the lifting cylinder (72) is retracted, the telescopic plate (73) and the ejecting roller (75) move upward, and the ejecting roller (75) is in a high-speed operation state, and is used to eject the shredded leaves blown through the first air outlet duct (54) into the secondary air selection channel (6); The third air gate (93) is controlled to adjust the air supply volume. Under the action of lateral blowing, c% of the leaf filaments are selected to enter the primary air selection channel (5), and d% of the leaf filaments are selected to enter the secondary air selection channel (6). The c% of the leaf filaments are in the primary air selection channel (5), and the first air gate (95) is controlled to adjust the air volume of the first air outlet pipe (54) to complete the leaf filament flotation process; the e% of the leaf filaments that have completed the flotation process in the primary air selection channel (5) are transported to the secondary air selection channel (6) under the action of the side lower air inlet provided by the first air outlet pipe (54) and the material springing roller (75). The d+e% of the leaf filaments are in the secondary air selection channel (6), and the second air gate (97) is controlled to adjust the air volume of the second air outlet pipe (64) to complete the leaf filament flotation process; The shredded leaves that have passed through the air selection channel are transported to the next stage through the first conveying and discharging mechanism, and the stems that have been removed through the primary air selection channel (5) and the secondary air selection channel (6) are collected through the second conveying and discharging mechanism; Among them, a%+b%=100%, a is greater than b, c%+d%=100%, c is greater than or equal to e, and the leaf shreds can enter the wind selection channel multiple times to complete the leaf shred flotation process.

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