A method and system for making a cut tobacco rod

Abstract

The application provides a method for recycling stem thread, comprising: a separation step of pulling and shearing the stem thread group, loosening the stem thread group, and separating the tobacco and the stem thread contained in the loosened stem thread group by air selection to recycle the tobacco and the stem thread respectively; a tabletting step of extruding the stem thread into stem tablets; and a cutting step of cutting the stem tablets into stem threads. The tobacco and the stem thread contained in the stem thread group are separated, and the stem thread is tabletted and cut, so that the stem thread can be added to cigarettes for recycling, thereby avoiding material waste and reducing manufacturing cost. The application also provides a stem thread recycling system for realizing the method.

Description

Technical Field

[0001] This invention relates to the field of tobacco processing equipment technology, and in particular to a method and system for recycling tobacco stems. Background Technology

[0002] In cigarette manufacturing, the stems and thorns in the tobacco not only cause problems such as popping, flameout, burnout, and punctures, but also lead to issues like cigarette pack slippage, blockages, and wear and tear on cigarette machine parts. Therefore, a secondary air separation process is necessary to remove these stems and thorns from the tobacco during production to ensure its purity.

[0003] However, the stems removed during the secondary air separation process contain a lot of tobacco shreds, which become entangled with the stems, forming clumps of stem shreds of varying sizes. In existing technologies, these removed clumps of stem shreds are not utilized effectively and are usually treated as waste, resulting in material waste and increased manufacturing costs. Summary of the Invention

[0004] The purpose of this invention is to solve the problems of material waste and high manufacturing costs caused by the lack of proper utilization of discarded tobacco stem bundles. This invention provides a method and system for recycling tobacco stem bundles, which can recycle and reuse the tobacco and stems in the bundles, thereby avoiding material waste and reducing manufacturing costs.

[0005] Embodiments of the present invention provide a method for reusing stem skewer fibers, comprising:

[0006] Separation steps: The stem bundle is pulled and sheared to loosen it, and the tobacco and stems contained in the loosened stem bundle are separated by air separation so that the tobacco and stems can be recycled separately.

[0007] Tableting steps: Squeeze the stem sticks into stem tablets;

[0008] Shredding steps: Cut the stem slices into shreds.

[0009] Optionally, before the separation step, a feeding step is also included, which includes: conveying the skein bundle stored in the silo to the downstream equipment to feed the downstream equipment, and adjusting the conveying flow rate of the skein bundle according to the material height in the silo;

[0010] When the material height in the hopper is greater than the preset height, the feed flow rate of the filament bundle decreases;

[0011] When the material height in the hopper is less than the preset height, the feed flow rate of the filament bundle increases.

[0012] Optionally, an impurity removal step may be included between the separation step and the tableting step. The impurity removal step includes:

[0013] The first negative pressure gas is used to adsorb dust in the material, so as to separate the stem from the dust;

[0014] The third negative pressure gas is used to adsorb the stems and stalks in the material, so that the stems and stalks are separated from the soot, grime and hard matter in the material.

[0015] Optionally, between the impurity removal step and the tableting step, a material spreading step is also included. The material spreading step includes: conveying the stem sticks into the conveying trough and using the vibration of the conveying trough to spread the stem sticks flat so that the thickness of the stem sticks is uniform.

[0016] Optionally, after the shredding step, a tobacco dust screening step is also included, which includes: conveying the tobacco stems into a linear vibrating screen, the bottom of which is provided with a filter screen, and using the vibration of the linear vibrating screen to remove the tobacco dust from the tobacco stems.

[0017] Optionally, after the tobacco dust screening step, a moisture control step is also included, which includes:

[0018] Obtain the actual moisture content within the stem;

[0019] The stems are heated, and the heating temperature is adjusted according to the actual moisture content.

[0020] Optionally, after the moisture control step, a tobacco re-blending step is also included, which includes: re-blending the stems into the tobacco online.

[0021] Embodiments of the present invention also provide a stem skewer recycling system for implementing any of the aforementioned stem skewer recycling methods, the stem skewer recycling system comprising:

[0022] The separation device is used to pull and shear the bundle of stems to loosen it and separate the tobacco and stems contained in the loosened bundle.

[0023] A tableting device is used to compress stem sticks into stem tablets;

[0024] A shredding device used to cut stem slices into shreds;

[0025] The control system is used to control the operation of the separation unit, the tableting unit, and the shredding unit.

[0026] Optionally, the separation device includes:

[0027] The conveying channel has a feed inlet at the top front and a discharge outlet at the bottom rear.

[0028] The first feeding plate is located in the conveying channel, with the front end of the first feeding plate located below the feed inlet and the rear end of the first feeding plate located above the discharge outlet.

[0029] The second feeding plate is located above the first feeding plate. The upper surface of the first feeding plate and the lower surface of the second feeding plate are spaced a certain distance apart. The front end of the second feeding plate is located behind the front end of the first feeding plate, and the rear end of the second feeding plate is located behind the rear end of the first feeding plate.

[0030] The first loosening roller group is located on the front side of the front end of the second feeding plate. There is a certain gap between the bottom of the first loosening roller group and the upper surface of the first feeding plate. The first loosening roller group is used to transport the skein bundle from the first feeding plate to the second feeding plate and loosen the skein bundle.

[0031] The drive mechanism is directly or indirectly connected to the first feed plate and the second feed plate. The drive mechanism is used to drive the first feed plate and the second feed plate to vibrate so as to convey the material from front to back.

[0032] The first fan is located below the discharge port. The first fan is used to blow air onto the material output from the second feeding plate to separate the tobacco and stems in the material.

[0033] Optionally, the separation device further includes:

[0034] The third feeding plate is located above the second feeding plate. The upper surface of the second feeding plate and the lower surface of the third feeding plate are spaced a certain distance apart. The front end of the third feeding plate is located behind the front end of the second feeding plate, and the rear end of the third feeding plate is located in front of the rear end of the second feeding plate.

[0035] The second loosening roller group is located on the front side of the front end of the third feeding plate. There is a certain gap between the bottom of the second loosening roller group and the upper surface of the second feeding plate. The second loosening roller group is used to transport the skein bundle from the second feeding plate to the third feeding plate and loosen the skein bundle.

[0036] The third loosening roller group is located above the middle of the third feeding plate. There is a certain gap between the bottom of the third loosening roller group and the upper surface of the third feeding plate. The third loosening roller group is used to transport the skein bundle from the front of the third feeding plate to the rear of the third feeding plate and loosen the skein bundle.

[0037] Optionally, the first loosening roller group, the second loosening roller group, and the third loosening roller group have the same structure, each including:

[0038] The upper loosening roller extends in a direction perpendicular to the direction of the conveying channel. Multiple first roller spikes are provided on the circumferential surface of the upper loosening roller, and each first roller spike extends radially along the upper loosening roller.

[0039] The lower loosening roller is parallel to the upper loosening roller and located below the upper loosening roller. Multiple second roller nails are provided on the circumferential surface of the lower loosening roller. Each second roller nail extends radially along the lower loosening roller. The upper loosening roller and the lower loosening roller rotate in the same direction, and the rotation speed of the upper loosening roller is greater than that of the lower loosening roller.

[0040] The first motor is used to provide power for the rotation of the upper and lower loosening rollers.

[0041] Optionally, the tableting device includes two parallel pressure rollers, which can rotate around their own axes in opposite directions. There is a certain gap between the circumferential surfaces of the two pressure rollers, allowing the tablet to pass between them. When the tablet passes between the two pressure rollers, the two pressure rollers can apply a squeezing force to the tablet to compress it into a tablet.

[0042] Optionally, the tableting apparatus further includes:

[0043] The two coating rollers are parallel to the pressure rollers, and the circumferential surfaces of the two coating rollers are respectively in contact with the circumferential surfaces of the two pressure rollers. The two coating rollers can rotate around their own axes.

[0044] Two liquid storage tanks are located below the two coating rollers. The liquid storage tanks are used to hold cleaning liquid and are equipped with liquid replenishment ports. Each liquid storage tank contains at least one absorbent felt, which is at least partially immersed in the cleaning liquid. The upper end of the absorbent felt is in contact with the coating roller.

[0045] Two cleaning scrapers are positioned on one side of the two coating rollers, respectively, along the rotation direction of the two pressure rollers. The two cleaning scrapers are tangent to the circumferential surfaces of the two pressure rollers and are used to remove the adhesive material from the circumferential surfaces of the pressure rollers.

[0046] Optionally, the shredding device includes two parallel cutter rollers, which can rotate around their own axes respectively, and there is a gap between the two cutter rollers. Each cutter roller is provided with multiple cutters at equal intervals along its axial direction, and each cutter is arranged in a ring around the circumference of the cutter roller. When the stem passes between the two cutter rollers, the cutter can cut the stem into shreds.

[0047] Optionally, the shredding device also includes:

[0048] Two toothed plates are respectively located on the outside of the two cutter rollers. Each toothed plate has multiple cleaning teeth at the end near the cutter roller, and each cleaning tooth is inserted between two adjacent cutters.

[0049] The grinding wheel is positioned close to the cutter, and its axis is parallel to that of the cutter roller. The grinding wheel can rotate around its own axis and can reciprocate along the axial and radial directions of the cutter roller.

[0050] The negative pressure adsorption mechanism includes a suction nozzle, the suction end of which is located close to the cleaning teeth, and the suction nozzle can reciprocate along the axial direction of the cutter roller.

[0051] Optionally, a feeding device is provided upstream of the stem and fiber clump separation device, which is used to feed materials to the separation device; the feeding device includes:

[0052] The hopper has a storage chamber inside. There is a hopper inlet at the top and a hopper outlet at the bottom. Both the hopper inlet and outlet are connected to the storage chamber. The storage chamber has a high level detection unit, a medium level detection unit and a low level detection unit arranged from top to bottom. The high level detection unit, the medium level detection unit and the low level detection unit are electrically connected to the control system.

[0053] The first belt conveyor is located below the material outlet of the hopper, with a certain distance between the material outlet of the hopper and the upper surface of the belt conveyor.

[0054] The discharge roller is located on one side of the hopper discharge port along the conveying direction of the upper surface of the first belt conveyor. The extension direction of the discharge roller is perpendicular to the conveying direction of the upper surface of the first belt conveyor. The circumferential surface of the discharge roller is spaced a certain distance from the upper surface of the belt conveyor. The discharge roller can rotate around its own axis. Multiple roller nails are evenly distributed on the circumferential surface of the discharge roller, and the roller nails extend along the radial direction of the discharge roller.

[0055] Optionally, an adjustment mechanism is connected to the discharge roller. This mechanism adjusts the height of the discharge roller in the vertical direction to change the minimum distance between the circumferential surface of the discharge roller and the upper surface of the belt conveyor. The adjustment mechanism includes:

[0056] Two adjusting plates are respectively located at both ends of the discharge roller, and both ends of the discharge roller are hinged to the two adjusting plates respectively; the adjusting plates are provided with threaded holes, and the two side walls of the hopper that are spaced apart along the axial direction of the discharge roller are respectively provided with strip-shaped holes extending in the vertical direction, or the adjusting plates are provided with strip-shaped holes extending in the vertical direction, and the two side walls of the hopper that are spaced apart along the axial direction of the discharge roller are respectively provided with threaded holes;

[0057] Multiple bolts are inserted through each of the slotted holes and threaded into the corresponding threaded holes to fix the adjusting plate to the side wall of the silo.

[0058] Optionally, a purification device is provided between the separating device and the tableting device. The purification device is used to remove impurities from the tablet stems. The purification device includes:

[0059] The first dust collector has a first feed inlet and a first air inlet on its side wall and a first discharge outlet at its bottom. The first feed inlet is used to feed materials into the first dust collector, and the first air inlet is used to introduce first negative pressure gas into the first dust collector. The adsorption force generated by the first negative pressure gas can adsorb dust in the material and will not adsorb the stems in the material.

[0060] The descaling pipe has a third feed port at the upper end and a third discharge port at the lower end. The third feed port is connected to the first discharge port. The side wall of the descaling pipe has a third air intake port. The third air intake port is used to introduce a third negative pressure gas into the descaling pipe. The adsorption force generated by the third negative pressure gas can adsorb the stems in the material, but will not adsorb the smears and hard objects in the material.

[0061] The second dust collector has a second feed inlet and a second air intake on its side wall and a second discharge outlet at its bottom. The second feed inlet is connected to the third air intake. The stalks in the descaling pipe can enter the second dust collector in sequence through the third air intake and the second feed inlet under the adsorption of the third negative pressure gas. The second air intake is used to introduce the second negative pressure gas into the first dust collector. The adsorption force generated by the second negative pressure gas can adsorb the dust in the stalks and will not adsorb the stalks.

[0062] The negative pressure generating mechanism is connected to the first air intake, the second air intake, and the third air intake. The negative pressure generating mechanism is used to provide the first negative pressure gas, the second negative pressure gas, and the third negative pressure gas.

[0063] Optionally, a spreading device is also provided between the impurity removal device and the tableting device. The spreading device is used to flatten the tablets. The spreading device is a conveying trough, which includes a third conveying section, a fourth conveying section and a fifth conveying section arranged sequentially along the material conveying direction. The extension directions of the third conveying section, the fourth conveying section and the fifth conveying section have a certain angle with the horizontal direction to convey the tablets from a low position to a high position. The width of the third conveying section is smaller than the width of the fifth conveying section, and the width of the fourth conveying section gradually increases along the material conveying direction.

[0064] Optionally, a moisture detector is installed above the third conveying section, and the material spreading device also includes:

[0065] The second conveying section has its discharge end connected to the inlet end of the third conveying section. The second conveying section extends horizontally, and its width gradually decreases along the material conveying direction.

[0066] The first conveying section has its discharge end connected to the inlet end of the second conveying section. The first conveying section extends horizontally and its width is greater than that of the third conveying section.

[0067] Optionally, a tobacco dust screening device is provided downstream of the shredding device along the material conveying direction. The tobacco dust screening device is a linear vibrating screen with a screen at the bottom. The linear vibrating screen can remove tobacco dust from the stems through vibration.

[0068] Optionally, a moisture control device is provided downstream of the tobacco dust screening device along the material conveying direction. The moisture control device includes:

[0069] A tunnel-type vibrating trough includes a trough body and a cover plate covering the trough body, with a tunnel formed between the trough body and the cover plate;

[0070] A heating plate is located at the bottom of the trough and is used to heat the skewer inside the tunnel-type vibrating trough.

[0071] Optionally, a back-mixing belt conveyor is provided downstream of the moisture control device along the material conveying direction. The discharge end of the tunnel-type vibrating trough is connected to the middle of the back-mixing belt conveyor. The tunnel-type vibrating trough can transport the stems to the back-mixing belt conveyor. The upstream end of the back-mixing belt conveyor is used to receive the tobacco output from the separation device. The back-mixing belt conveyor is used to back-mix the stems into the tobacco online.

[0072] Compared with the prior art, the present invention has the following beneficial effects:

[0073] This embodiment separates the tobacco shreds and stems contained in the stem bundle, and then compresses and cuts the stems into sheets, which can be recycled by turning the stems into stem shreds, thereby avoiding material waste and reducing manufacturing costs. Attached Figure Description

[0074] Figure 1 This diagram shows a method flowchart for a method of reusing stem filaments according to an embodiment of the present invention;

[0075] Figure 2 This diagram illustrates a stem and filament recycling system according to an embodiment of the present invention.

[0076] Figure 3 This is a top view of a stem and filament recycling system provided in an embodiment of the present invention;

[0077] Figure 4 This diagram illustrates a feeding device according to an embodiment of the present invention.

[0078] Figure 5 Show Figure 4 Sectional view along axis AA;

[0079] Figure 6 Show Figure 5 BB-direction sectional view;

[0080] Figure 7 Show Figure 4 A magnified view of part C in the middle;

[0081] Figure 8 Show Figure 5 A magnified view of part D in the middle;

[0082] Figure 9 A schematic diagram of a separation device provided in an embodiment of the present invention is shown;

[0083] Figure 10 This diagram illustrates an upper loosening roller and a lower loosening roller according to an embodiment of the present invention. Figure 1 ;

[0084] Figure 11 This diagram illustrates an upper loosening roller and a lower loosening roller according to an embodiment of the present invention. Figure 2 ;

[0085] Figure 12 This diagram shows a schematic of a purification device provided in an embodiment of the present invention;

[0086] Figure 13 A schematic diagram of a descaling pipe provided in an embodiment of the present invention is shown;

[0087] Figure 14 This diagram shows a schematic of a material spreading device according to an embodiment of the present invention;

[0088] Figure 15 This figure shows a front view of a material spreading device according to an embodiment of the present invention;

[0089] Figure 16 This diagram illustrates a tableting apparatus according to an embodiment of the present invention.

[0090] Figure 17 This diagram illustrates a shredding device according to an embodiment of the present invention;

[0091] Figure 18 This diagram shows a partial structural schematic of the toothed plate in a shredding device provided in an embodiment of the present invention;

[0092] Figure 19 A schematic diagram of a moisture regulation device provided in an embodiment of the present invention is shown.

[0093] Figure label:

[0094] 1. Feeding belt conveyor; 2. Feeding device; 21. Hopper; 210. Wire bundle; 211. Hopper inlet; 212. Hopper outlet; 213. High level detection unit; 214. Medium level detection unit; 215. Low level detection unit; 216. Storage chamber; 22. First belt conveyor; 23. Discharge roller; 231. Roller nail; 24. Adjusting plate; 241. Strip hole; 242. Threaded hole; 25. Second transmission mechanism; 3. Separation device; 31. Conveying channel; 311. Inlet... 312. Feed inlet, 313. Discharge outlet, 314. First feed plate, 315. Second feed plate, 316. Third feed plate, 32. First loosening roller group, 33. Second loosening roller group, 34. Third loosening roller group, 35. Upper loosening roller, 351. First roller nail, 36. Lower loosening roller, 361. Second roller nail, 37. First fan, 38. First motor, 39. First transmission mechanism, 4. Impurity removal device, 41. First dust collector, 411. First feed inlet, 412. First suction inlet, 413. 42. First discharge port, 42. Second dust collector, 421. Second feed inlet, 422. Second suction port, 423. Second discharge port, 43. Descaling pipe, 431. Third feed inlet, 432. Third discharge port, 433. Third suction port, 434. Guide pipe, 44. Negative pressure generating mechanism, 45. Bag filter, 46. First air pipe, 47. Second air pipe, 58. Material spreading device, 51. First conveying section, 52. Second conveying section, 53. Third conveying section, 54. Fourth conveying section 55. Fifth conveyor section, 56. Moisture detector, 6. Tableting device, 61. Pressure roller, 62. Coating roller, 63. Storage tank, 64. Absorbent felt, 65. Cleaning scraper, 66. Hopper, 7. Conveyor belt, 8. Shredding device, 81. Knife roller, 82. Cutter, 83. Toothed plate, 831. Cleaning tooth, 84. Grinding wheel, 85. Nozzle, 9. Tobacco dust screening device, 10. Moisture control device, 101. Tank, 102. Cover plate, 103. Heating plate, 11. Blending belt conveyor. Detailed Implementation

[0095] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Although the description of the present invention is presented in conjunction with preferred embodiments, this does not mean that the features of the invention are limited to these embodiments. On the contrary, the purpose of describing the invention in conjunction with embodiments is to cover other options or modifications that may be derived based on the claims of the present invention. To provide a deep understanding of the invention, many specific details will be included in the following description. The invention may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of the invention, some specific details will be omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0096] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0097] In the description of this embodiment, it should be noted that the terms "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of the invention is usually placed in during use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0098] The terms “first,” “second,” “third,” etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0099] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.

[0100] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0101] refer to Figure 1 This embodiment provides a method for reusing stem strips, including:

[0102] Separation steps: The stem bundle is pulled and sheared to loosen it, and the tobacco and stems contained in the loosened stem bundle are separated by air separation so that the tobacco and stems can be recycled separately.

[0103] Tableting steps: Squeeze the stem sticks into stem tablets;

[0104] Shredding steps: Cut the stem slices into shreds.

[0105] By adopting the above technical solution, the tobacco and stems contained in the stem bundle are separated, and then the stems are pressed into tablets and cut into strips. The stems can be recycled and reused, thereby avoiding material waste and reducing manufacturing costs.

[0106] Furthermore, prior to the separation step, a feeding step is also included, which includes: conveying the skein bundles stored in the silo to the downstream equipment to supply the downstream equipment, and adjusting the conveying flow rate of the skein bundles according to the material height in the silo.

[0107] When the material height in the hopper is greater than the preset height, the feed flow rate of the filament bundle decreases;

[0108] When the material height in the hopper is less than the preset height, the feed flow rate of the filament bundle increases.

[0109] By adjusting the conveying flow rate of the filament bundle according to the material height in the silo, the material height in the silo can be automatically controlled, thereby ensuring a stable and uniform output of material from the silo.

[0110] Optionally, an impurity removal step may be included between the separation step and the tableting step. The impurity removal step includes:

[0111] The first negative pressure gas is used to adsorb dust in the material, so as to separate the stem from the dust;

[0112] The third negative pressure gas is used to adsorb the stems and stalks in the material, so that the stems and stalks are separated from the soot, grime and hard matter in the material.

[0113] By removing impurities (dust, tobacco residue, hard objects, etc.) from the stem, it is possible to prevent these impurities from affecting the smoke indicators during the suction process and to eliminate the adverse effects of hard impurities on the stem processing device, thereby reducing the probability of damage to the stem processing device.

[0114] Optionally, between the impurity removal step and the tableting step, a material spreading step is also included. The material spreading step includes: conveying the stem sticks into the conveying vibrating trough and using the vibration of the conveying vibrating trough to spread the stem sticks flat so that the thickness of the stem sticks is uniform, thereby avoiding uneven and poor quality of the stem tablets pressed out in the subsequent tableting step.

[0115] Optionally, after the shredding step, a tobacco dust screening step is also included, which includes: conveying the tobacco stems into a linear vibrating screen, the bottom of which is provided with a filter screen, and using the vibration of the linear vibrating screen to remove the tobacco dust from the tobacco stems.

[0116] Optionally, after the tobacco dust screening step, a moisture control step is also included, which includes:

[0117] Obtain the actual moisture content within the stem fibers;

[0118] The stems are heated, and the heating temperature is adjusted according to the actual moisture content.

[0119] Adjusting the moisture content of the stems by heating and drying ensures their quality and prevents them from becoming moldy.

[0120] Optionally, after the moisture control step, a tobacco re-blending step is also included, which includes: re-blending the shredded stems made from the stem sticks into the tobacco recovered in the separation step online, so as to recycle the material.

[0121] refer to Figure 2 and Figure 3 Embodiments of the present invention also provide a stem and skewer recycling system for implementing any of the aforementioned stem and skewer recycling methods. The stem and skewer recycling system comprises, along the material conveying direction, the following components:

[0122] Feeding belt conveyor 1 is used to transport the skein bundles output from the upstream process to the skein stick making and recycling system;

[0123] The feeding device 2 is used to receive the skein bundles output by the feeding belt conveyor 1 and to feed the subsequent devices in the skein filament recycling system.

[0124] The separating device 3 is used to receive the stem bundle output by the feeding device 2, and to pull and cut the stem bundle to loosen it, and to separate the tobacco and stems contained in the loosened stem bundle.

[0125] The impurity removal device 4 is used to receive the stems output by the separation device 3 and remove impurities (such as dust, soot, and hard objects) from the stems.

[0126] The material spreading device 5 is used to receive the stems output by the impurity removal device 4 and spread the stems flat to make the stems of uniform thickness.

[0127] The tableting device 6 is used to receive the sticks output by the spreading device 5 and compress the sticks into tablets.

[0128] The shredding device 8 is used to receive the tablets output by the tableting device 6 and to cut the tablets into shreds.

[0129] The tobacco dust screening device 9 is used to receive the stems output by the shredder 8 and remove the tobacco dust inside the stems by vibrating screening.

[0130] Moisture control device 10 is used to receive the tobacco stems output from tobacco sieving device 9 and adjust the moisture content of the tobacco stems.

[0131] The back-mixing belt conveyor 11 is used to receive the stems output from the moisture control device 10 and the tobacco output from the separation device 3, and to back-mix the stems into the tobacco online.

[0132] Furthermore, the stem and skewer recycling system provided in this embodiment also includes a control system, which is used to control the operation of the above-mentioned devices.

[0133] Further reference Figures 4 to 8The feeding device 2 includes:

[0134] The hopper 21 has a storage chamber 216 inside, which is used to store the skewer bundles. A hopper inlet 211 is located at the top of the hopper 21, and a hopper outlet 212 is located at the bottom of the hopper 21. Both the hopper inlet 211 and the hopper outlet 212 are connected to the storage chamber 216. Inside the storage chamber 216, from top to bottom, there are a high-level detection unit 213, a medium-level detection unit 214, and a low-level detection unit 215. The "top" position is... Figure 1 and Figure 4 The direction pointed to by the middle arrow Y, the "down" direction is the direction opposite to... Figure 1 and Figure 4 The direction indicated by the middle arrow Y is opposite to the direction of the control system. The high-level detection unit 213, medium-level detection unit 214, and low-level detection unit 215 are electrically connected to the control system. When the material level in the storage chamber 216 reaches the detection area of ​​the high-level detection unit 213, the high-level detection unit 213 sends a signal to the control system.

[0135] The first belt conveyor 22 is located below the material outlet 212 of the hopper, and the material outlet 212 of the hopper is a certain distance away from the upper surface of the belt conveyor.

[0136] The discharge roller 23 is located on one side of the hopper discharge port 212, along the conveying direction of the upper surface of the first belt conveyor 22. The extension direction of the discharge roller 23 is perpendicular to the conveying direction of the upper surface of the first belt conveyor 22. The circumferential surface of the discharge roller 23 is spaced a certain distance from the upper surface of the belt conveyor. The motor can drive the discharge roller 23 to rotate around its own axis through the second transmission mechanism 25. The rotation direction of the discharge roller 23 is as follows: Figure 6 As shown by arrow R, multiple roller nails 231 are evenly distributed on the circumferential surface of the discharge roller 23, and the roller nails 231 extend along the radial direction of the discharge roller 23.

[0137] In this embodiment, the output end of the feeding conveyor belt 1 is located above the hopper inlet 211. The filament bundles output by the feeding conveyor belt 1 fall into the storage chamber 216 through the hopper inlet 211. When the material level in the storage chamber 216 reaches the detection area of ​​the high-level detection unit 213, the high-level detection unit 213 sends a signal to the control system. When the control system receives the signal sent by the high-level detection unit 213, it indicates that the material level in the hopper 21 has reached the detection point of the high-level detection unit 213. At this time, the control system controls the feeding conveyor belt 1 to stop running to prevent excessive material in the hopper 21 from causing compression and affecting the discharge stability of the hopper 21.

[0138] When the material level in the storage chamber 216 reaches the detection area of ​​the intermediate material level detection unit 214, the intermediate material level detection unit 214 sends a signal to the control system. When the control system receives the signal sent by the intermediate material level detection unit 214, it indicates that the material level in the hopper 21 has reached the detection point of the intermediate material level detection unit 214. At this time, the control system controls the feeding belt conveyor 1 to decelerate to prevent excessive material in the hopper 21.

[0139] When the control system receives a signal from the low level detection unit 215 but does not receive a signal from the medium level detection unit 214, it indicates that the material level in the hopper 21 is between the detection points of the low level detection unit 215 and the medium level detection unit 214. At this time, the control system controls the feeding belt conveyor 1 to accelerate to increase the material in the hopper 21.

[0140] By adjusting the conveying flow rate of the filament bundle according to the material height in the hopper 21, the material height in the hopper 21 can be automatically controlled, thereby ensuring a stable and uniform output of material from the hopper 21.

[0141] Furthermore, when the filament bundle 210 is discharged from the hopper outlet 212 onto the first belt conveyor 22, the first belt conveyor 22 will transport the filament bundle 210 to the discharge roller 23, such as... Figure 6 As shown, the roller nail 231 hooks the skein bundle 210 as it rotates with the discharge roller 23, and pulls the skein bundle 210 out from below the discharge port 212 of the hopper. Then, it drives the skein bundle 210 through the gap between the discharge roller 23 and the upper surface of the first belt conveyor 22, thereby ensuring that the skein bundle 210 is output smoothly, avoiding material blockage, and thus improving production efficiency.

[0142] Optionally, refer to Figure 7 An adjustment mechanism is connected to the discharge roller 23. This mechanism adjusts the vertical height of the discharge roller 23 to change the minimum distance between the circumferential surface of the discharge roller 23 and the upper surface of the belt conveyor. The adjustment mechanism includes:

[0143] Two adjusting plates 24 are respectively located at both ends of the discharge roller 23, and both ends of the discharge roller 23 are hinged to the two adjusting plates 24 respectively; the adjusting plates 24 are provided with threaded holes 242, and the two side walls of the hopper 21 are provided with vertically extending strip holes 241 at intervals along the axial direction of the discharge roller 23; or, the adjusting plates 24 are provided with vertically extending strip holes 241, and the two side walls of the hopper 21 are provided with threaded holes 242 at intervals along the axial direction of the discharge roller 23.

[0144] Multiple bolts pass through each of the strip holes 241 and are threadedly connected to the corresponding threaded holes 242, so that the adjusting plate 24 is fixed to the side wall of the hopper 21.

[0145] By changing the fixing position of the bolt in the slot 241, the fixing height of the adjusting plate 24 in the vertical direction can be changed to adjust the gap between the circumferential surface of the discharge roller 23 and the upper surface of the first belt conveyor 22. Thus, the minimum gap between the circumferential surface of the discharge roller 23 and the upper surface of the first belt conveyor 22 can be adjusted according to the size and type of different filament bundles to ensure that the filament bundles can pass smoothly through the gap.

[0146] Further reference Figures 9 to 11 The separation device 3 includes:

[0147] The conveying channel 31 has a feed inlet 311 at the upper front and a discharge outlet 312 at the lower rear; wherein, the "upper" position is... Figure 9 The direction pointed to by the middle arrow Y, the "down" direction is the direction opposite to... Figure 9 The direction indicated by the middle arrow Y is opposite to the direction indicated by the arrow.

[0148] The first feeding plate 313 is disposed within the conveying channel 31, with its front end positioned below the feed inlet 311 and its rear end positioned above the discharge outlet 312; wherein, the "rear" position is... Figure 9 The direction indicated by the middle arrow X, the "front" direction is... Figure 9 The direction indicated by the middle arrow X is opposite to the direction indicated by the arrow.

[0149] The second feeding plate 314 is located above the first feeding plate 313. The upper surface of the first feeding plate 313 and the lower surface of the second feeding plate 314 are spaced apart by a certain distance. The front end of the second feeding plate 314 is located behind the front end of the first feeding plate 313, and the rear end of the second feeding plate 314 is located behind the rear end of the first feeding plate 313.

[0150] The first loosening roller group 32 is located on the front side of the front end of the second feeding plate 314. There is a certain gap between the bottom of the first loosening roller group 32 and the upper surface of the first feeding plate 313. The first loosening roller group 32 is used to transport the skein bundle from the first feeding plate 313 to the second feeding plate 314 and loosen the skein bundle.

[0151] The drive mechanism is directly or indirectly connected to the first feeding plate 313 and the second feeding plate 314. The drive mechanism is used to drive the first feeding plate 313 and the second feeding plate 314 to vibrate so as to convey the material from front to back.

[0152] The first blower 37 is located below the discharge port 312. The first blower 37 is used to blow air onto the material output from the second feeding plate 314 to blow out the tobacco in the material and separate the tobacco from the stem.

[0153] In this embodiment, the output end of the first belt conveyor 22 in the feeding device 2 is located above the feed inlet 311. The stem bundle output by the first belt conveyor 22 can fall onto the first feeding plate 313 through the feed inlet 311. Subsequently, the stem bundle is conveyed to the first loosening roller group 32 under the vibration of the first feeding plate 313. Impurities mixed in the stem bundle are separated from the stem bundle during the vibration and are output from the rear end of the first feeding plate 313 after passing through the gap between the first loosening roller group 32 and the first feeding plate 313. The stem bundle formed by the entanglement of stem sticks and tobacco is hooked and loosened by the first loosening roller group 32 and then thrown onto the second feeding plate 314. The loosened stem sticks and tobacco are conveyed to the rear end of the second feeding plate 314 under the vibration of the second feeding plate 314. The stem sticks and tobacco fall from the rear end of the second feeding plate 314, and the first motor 38 blows air onto the falling stem sticks and tobacco. Because the stem is relatively heavy, it is not significantly affected by the wind during its descent and falls vertically downwards. The tobacco, on the other hand, is relatively light, so the wind blows it out of the stem, causing it to fall behind the stem, thus separating the tobacco from the stem.

[0154] In this embodiment, the first loosening roller group 32 pulls and shears the tobacco shreds to loosen them. Then, the first blower 37 blows air onto the loosened material to blow the lighter tobacco shreds out of the stem sticks, thereby separating the tobacco shreds from the stem sticks. Specifically, different collection boxes can be used to collect the separated tobacco shreds and stem sticks separately.

[0155] Furthermore, the separation device 3 also includes:

[0156] The third feeding plate 315 is located above the second feeding plate 314. The upper surface of the second feeding plate 314 and the lower surface of the third feeding plate 315 are spaced apart by a certain distance. The front end of the third feeding plate 315 is located behind the front end of the second feeding plate 314, and the rear end of the third feeding plate 315 is located in front of the rear end of the second feeding plate 314.

[0157] The second loosening roller group 33 is located on the front side of the front end of the third feeding plate 315. There is a certain gap between the bottom of the second loosening roller group 33 and the upper surface of the second feeding plate 314. The second loosening roller group 33 is used to transport the skein bundle from the second feeding plate 314 to the third feeding plate 315 and loosen the skein bundle.

[0158] The third loosening roller group 34 is located above the middle of the third feeding plate 315. There is a certain gap between the bottom of the third loosening roller group 34 and the upper surface of the third feeding plate 315. The third loosening roller group 34 is used to transport the skein bundle from the front of the third feeding plate 315 to the rear of the third feeding plate 315 and loosen the skein bundle.

[0159] This embodiment, by setting up a second loosening roller group 33 and a third loosening roller group 34, can loosen the stem bundle in multiple stages. After the stem bundle is loosened by the first loosening roller group 32, the stem bundle may not be completely loosened. That is, part of the stem bundle is loosened into discrete stem sticks and tobacco shreds, while another part of the stem bundle is not loosened and still exists in the form of stem sticks and tobacco shreds entangled together. At this time, the discrete stem sticks and tobacco shreds pass through the gap between the second loosening roller group 33 and the second feeding plate 314 and are conveyed to the rear end of the second feeding plate 314. The stem bundle that has not been loosened sufficiently is hooked and loosened by the second loosening roller group 33, and then thrown onto the third feeding plate 315. Subsequently, the loosened stems and tobacco shreds, after being loosened by the second loosening roller group 33, are conveyed through the gap between the third loosening roller group 34 and the third feeding plate 315 to the rear end of the third feeding plate 315, and then fall from the rear end of the third feeding plate 315 onto the second feeding plate 314. Clumps of stems and tobacco that have not been sufficiently loosened are hooked and loosened by the third loosening roller group 34, and then thrown to the rear of the third feeding plate 315. The loosened stems and tobacco shreds, after being loosened by the third loosening roller group 34, are then conveyed to the rear end of the third feeding plate 315, and then fall from the rear end of the third feeding plate 315 onto the second feeding plate 314. After being loosened by the first loosening roller group 32, the second loosening roller group 33, and the third loosening roller group 34, the stems and tobacco shreds finally fall from the rear end of the second feeding plate 314. The first fan 37 blows air onto the falling stems and tobacco shreds, blowing the tobacco shreds out of the stems and shreds, thus separating the tobacco shreds from the stems and shreds. The applicant has discovered that after the stem shreds are loosened in three stages, the shreds are completely loosened into discrete stems and tobacco shreds, without clumping, thus ensuring the loosening effect of the stem shreds.

[0160] Further reference Figure 10 and Figure 11 The first loosening roller group 32, the second loosening roller group 33, and the third loosening roller group 34 have the same structure, each including:

[0161] The upper loosening roller 35 extends in a direction perpendicular to the extension direction of the conveying channel 31. A plurality of first roller nails 351 are provided on the circumferential surface of the upper loosening roller 35, and each first roller nail 351 extends radially along the upper loosening roller 35.

[0162] The lower loosening roller 36 is parallel to the upper loosening roller 35 and located below the upper loosening roller 35. Multiple second roller nails 361 are provided on the circumferential surface of the lower loosening roller 36. Each second roller nail 361 extends radially along the lower loosening roller 36. The upper loosening roller 35 and the lower loosening roller 36 rotate in the same direction. The rotation speed of the upper loosening roller 35 is greater than that of the lower loosening roller 36.

[0163] The first motor 38 is used to provide power for the rotation of the upper loosening roller 35 and the lower loosening roller 36.

[0164] Specifically, Figure 11 for Figure 10 The left view shows the upper loosening roller 35 and the lower loosening roller 36. A first motor 38 is connected to either the upper loosening roller 35 or the lower loosening roller 36. The ends of the upper loosening roller 35 and the lower loosening roller 36 are connected via a first transmission mechanism 39. When the first motor 38 drives one loosening roller to rotate, that roller can transmit power to the other loosening roller via the first transmission mechanism 39, so that the two loosening rollers rotate synchronously. For example, the first transmission mechanism 39 can be a structure consisting of a belt and a pulley.

[0165] Specifically, the upper loosening roller 35... Figure 11 The lower loosening roller 36 rotates in the R1 direction and moves along the R1 direction. Figure 11 The upper loosening roller 35 rotates in the R2 direction, and the speed ratio of the lower loosening roller 36 to the upper loosening roller 35 is 1.3:1; the skein bundle rotates along... Figure 11 The material is conveyed in the X direction, meaning that during production, the strands need to be transported from the front of the loosening device to the rear of the loosening device.

[0166] When the skein bundle is conveyed from the front of the loosening device to the lower loosening roller 36, the second roller nail 361 located in front of the lower loosening roller 36 rotates from bottom to top. During the rotation, the second roller nail 361 catches the skein bundle and conveys it upward. When the skein bundle is transferred to the upper loosening roller 35, the first roller nail 351 located in front of the upper loosening roller 35 also catches the skein bundle during the rotation and continues to convey it upward. Since the rotation speed of the upper loosening roller 35 is greater than that of the lower loosening roller 36, the skein bundle is pulled by the first roller nail 351 and the second roller nail 361, thereby loosening the skein bundle. Subsequently, the loosened material is thrown upward with the rotation of the first roller nail 351 and the second roller nail 361 and is thrown to the rear of the upper loosening roller 35 and the lower loosening roller 36. Since the axial distance between the upper loosening roller 35 and the lower loosening roller 36 is fixed, the long stems in the skein bundle can be pulled to a fixed length and then broken off by the differential speed operation of the upper loosening roller 35 and the lower loosening roller 36, thereby achieving fixed-length loosening of the skein bundle.

[0167] Further reference Figure 12 and Figure 13 The impurity removal device 4 includes:

[0168] The first dust collection box 41 has a first feed inlet 411 and a first suction port 412 on its side wall and a first discharge port 413 at its bottom. The first feed inlet 411 is used to feed materials into the first dust collection box 41, and the first suction port 412 is used to introduce first negative pressure gas into the first dust collection box 41. The adsorption force generated by the first negative pressure gas can adsorb dust in the material and will not adsorb the stems in the material.

[0169] The descaling pipe 43 has a third feed inlet 431 at its upper end and a third discharge outlet 432 at its lower end. The third feed inlet 431 is connected to the first discharge outlet 413. The side wall of the descaling pipe 43 has a third air intake 433. The third air intake 433 is used to introduce a third negative pressure gas into the descaling pipe 43. The adsorption force generated by the third negative pressure gas can adsorb the stems in the material, but will not adsorb the tar and hard objects in the material.

[0170] The second dust collection box 42 has a second feed inlet 421 and a second suction port 422 on its side wall and a second discharge port 423 at its bottom. The second feed inlet 421 is connected to the third suction port 433. The stalks in the descaling pipe 43 can enter the second dust collection box 42 in sequence through the third suction port 433 and the second feed inlet 421 under the adsorption of the third negative pressure gas. The second suction port 422 is used to introduce the second negative pressure gas into the first dust collection box 41. The adsorption force generated by the second negative pressure gas can adsorb the dust in the stalks and will not adsorb the stalks.

[0171] The negative pressure generating mechanism 44 is connected to the first air intake 412, the second air intake 422 and the third air intake 433. The negative pressure generating mechanism 44 is used to provide the first negative pressure gas, the second negative pressure gas and the third negative pressure gas.

[0172] Furthermore, the negative pressure generating mechanism 44 is a second fan, which has a first air inlet, a second air inlet, and an exhaust outlet. The first air inlet is connected to the first suction port 412 via an air pipe, and the second air inlet is connected to the second suction port 422 via an air pipe. The impurity removal device also includes a guide pipe 434 and a bag filter 45. One end of the guide pipe 434 is connected to the third suction port 433, and the other end is connected to the second feed inlet 421 via an air pipe. The bag filter 45 is a commonly used dust collector in industrial production and can be purchased on the market. The bag filter 45 has a dust collection port, which is connected to the exhaust outlet of the second fan via an air pipe. The exhaust gas sequentially passes through the air pipe and the dust collection port into the interior of the bag filter 45, which is used to remove dust and particulate matter mixed in with the exhaust gas from the second fan.

[0173] When the second fan is running, it provides a first negative pressure gas to the first suction port 412 and a second negative pressure gas to the second suction port 422. Since the second dust collection box 42 and the descaling pipe 43 are connected to the air pipe via the feed pipe 434, the negative pressure generated by the second fan can also flow into the descaling pipe 43 to form a third negative pressure gas. This embodiment utilizes a single fan to simultaneously provide the first, second, and third negative pressure gases to the device, thereby reducing the cost of the device.

[0174] During operation, the stems output from the separator 3 are fed into the first dust collector 41 through the first feed inlet 411. Dust within the stems is adsorbed by the first negative pressure gas and discharged through the first suction port 412. After dust removal, the stems are discharged through the first discharge port 413 into the descaling pipe 43 under gravity. As the stems fall within the descaling pipe 43, they are adsorbed by the third negative pressure gas and discharged through the third suction port 433. Smoke residue and hard materials within the stems are discharged through the third discharge port 432 under gravity. The stems discharged from the third suction port 433 are then transported to the second dust collector 42 under the adsorption of the third negative pressure gas. The negative pressure generating mechanism 44 provides second negative pressure gas to the second dust collector 42 through the second suction port 422. Dust within the material is adsorbed by the second negative pressure gas and discharged through the second suction port 422. The dust-removed stems are then discharged through the second discharge port 423 under gravity.

[0175] Furthermore, the air pipe connecting the first air inlet and the second air suction inlet 422 is the first air pipe 46, and the air pipe connecting the second feed inlet 421 and the guide pipe 434 is the second air pipe 47. The diameter of the second air pipe 47 is smaller than the diameter of the first air pipe 46. According to common knowledge in the art, under the same gas flow rate, the smaller the cross-sectional area of ​​the airflow channel, the faster the gas flow rate. In this embodiment, since the second dust collector 42 is connected to the descaling pipe 43, the gas flow rate inside them is the same. Since the diameter of the second air pipe 47 is smaller than the diameter of the first air pipe 46, the gas flow rate in the second air pipe 47 is greater than the gas flow rate in the first air pipe 46. This results in the adsorption force generated by the third negative pressure gas being greater than the adsorption force generated by the second negative pressure gas. Thus, the third negative pressure gas can adsorb the stems, while the second negative pressure gas cannot adsorb the stems and can only adsorb the dust mixed in with the stems.

[0176] The impurity removal device 4 provided in this embodiment, by setting a first dust removal box 41, a second dust removal box 42 and a descaling pipe 43, can use the first negative pressure gas in the first dust removal box 41 to adsorb and remove dust in the stem sticks, use the third negative pressure gas in the descaling pipe 43 to adsorb the stem sticks to remove the soot and hard objects in the stem sticks, and then use the second negative pressure gas in the second dust removal box 42 to remove the dust in the stem sticks for a second time, thereby removing all impurities in the stem sticks, avoiding the impurities mixed in the stem sticks from affecting the flue gas indicators, and eliminating the adverse effects of hard impurities on the stem stick processing device, reducing the probability of damage to the stem stick processing device.

[0177] Further reference Figure 14 and Figure 15 The material spreading device 5 is a conveying vibrating trough, which includes a third conveying section 53, a fourth conveying section 54 and a fifth conveying section 55 arranged sequentially along the material conveying direction. The extension directions of the third conveying section 53, the fourth conveying section 54 and the fifth conveying section 55 have a certain angle with the horizontal direction so as to convey the sticks from the low position to the high position. The width of the third conveying section 53 is smaller than the width of the fifth conveying section 55, and the width of the fourth conveying section 54 gradually increases along the material conveying direction.

[0178] After the stems are output from the impurity removal device 4, they enter the spreading device 5. The spreading device 5 conveys the stems through vibration, which flattens them. In this embodiment, the width of the fifth conveying section 55 is set to be greater than the width of the third conveying section 53, and the width of the fourth conveying section 54 gradually increases along the material conveying direction. When the stems move from the third conveying section 53 to the fourth conveying section 54, the conveying space of the stems gradually increases as the width of the fourth conveying section 54 gradually increases, thereby causing the stems to spread continuously and the number of stacked layers of stems gradually decreases. When the stems move from the fourth conveying section 54 to the fifth conveying section 55, the conveying space of the stems further increases, and the stems are further spread and flattened, so that the stems can enter the tableting device 6 in a single layer evenly, avoiding uneven tablets and poor quality tablets pressed by the tableting device 6. This embodiment sets the extension directions of the third conveying section 53, the fourth conveying section 54 and the fifth conveying section 55 to have a certain angle with the horizontal direction, so that the tablet can be raised during the conveying process, thereby enabling the material to be conveyed to the tableting device 6 with a certain height.

[0179] Optionally, a moisture detector 56 is installed above the third conveying section 53, and the spreading device 5 also includes:

[0180] The second conveying section 52 has its discharge end connected to the inlet end of the third conveying section 53. The second conveying section 52 extends horizontally, and its width gradually decreases along the material conveying direction.

[0181] The first conveying section 51 has its discharge end connected to the inlet end of the second conveying section 52. The first conveying section 51 extends horizontally and its width is greater than that of the third conveying section 53.

[0182] This embodiment uses a moisture detector 56 installed above the third conveying section 53 to detect the moisture content of the stems. In the prior art, if the stems being tested are thin, the moisture detector 56 will produce inaccurate results. This embodiment, by setting the width of the second conveying section 52 to gradually decrease along the material conveying direction and setting the width of the first conveying section 51 to be greater than the width of the third conveying section 53, allows the stems to be gathered together during the conveying process from the first conveying section 51 to the third conveying section 53, resulting in a stack thickness of more than two layers in the third conveying section 53. This satisfies the moisture detection requirement for the stack thickness of the stems, improving detection accuracy.

[0183] Further reference Figure 16 The tablet pressing device 6 includes two parallel pressure rollers 61, which are capable of rotating around their own axes in opposite directions (e.g., ...). Figure 16As shown in R3 and R4, there is a certain gap between the circumferential surfaces of the two pressure rollers 61. A hopper 66 is provided above the gap. The stick can pass between the two pressure rollers 61 under the guidance of the hopper 66. When the stick passes between the two pressure rollers 61, the two pressure rollers 61 can apply extrusion force to the stick to squeeze it into a stick sheet.

[0184] Optionally, the tablet compressing device 6 further includes:

[0185] The two coating rollers 62 are parallel to the pressure rollers 61. The circumferential surfaces of the two coating rollers 62 are respectively in contact with the circumferential surfaces of the two pressure rollers 61. The two coating rollers 62 can rotate around their own axes.

[0186] Two liquid storage tanks 63 are located below the two coating rollers 62. The liquid storage tanks 63 are used to hold cleaning liquid. Each liquid storage tank 63 is provided with a liquid replenishment port. Each liquid storage tank 63 is provided with at least one absorbent felt 64. The absorbent felt 64 is at least partially immersed in the cleaning liquid. The upper end of the absorbent felt 64 is in contact with the coating roller 62.

[0187] Two cleaning scrapers 65 are respectively disposed on one side of the two coating rollers 62 along the rotation direction of the two pressure rollers 61. The two cleaning scrapers 65 are tangent to the circumferential surface of the two pressure rollers 61. The cleaning scrapers 65 are used to remove the adhesive on the circumferential surface of the pressure rollers 61.

[0188] Specifically, the cleaning fluid can be water. When the tablet pressing device 6 is working, the two pressure rollers 61 crush the tablets during their relative rotation, turning the tablets into sheets. Simultaneously, an adhesive liquid formed from tablet fragments and pectin is generated. This adhesive liquid coats the circumferential surface of the pressure rollers 61, forming an adhesive layer that can easily cause the pressure rollers 61 to jam. In this embodiment, the absorbent felt 64 is made of absorbent material (e.g., wool felt). The absorbent felt 64 can absorb the cleaning fluid from the storage tank 63 and conduct the cleaning fluid to its upper end, which then contacts the coating roller 62. This allows the cleaning fluid on the absorbent felt 64 to be applied to the circumferential surface of the coating roller 62. The cleaning fluid can wet the adhesive layer on the surface of the pressure roller 61, loosening it. The cleaning scraper 65 can then scrape off the adhesive layer wetted by the cleaning fluid from the circumferential surface of the pressure roller 61, effectively cleaning the pressure roller 61 and preventing it from jamming.

[0189] Further reference Figure 17 and Figure 18 The shredding device 8 includes two parallel cutter rollers 81, which can rotate around their own axes respectively, and there is a gap between the two cutter rollers 81. Each cutter roller 81 is provided with a plurality of cutters 82 at equal intervals along its axial direction, and each cutter 82 is arranged in a ring around the circumference of the cutter roller 81.

[0190] In this embodiment, the tablets output by the tableting device 6 fall onto the conveyor belt 7, which transports the tablets above the gap between the two cutter rollers 81, causing the tablets to fall into the gap between the two cutter rollers 81. As the tablets pass between the two cutter rollers 81, the cutter 82 can cut the tablets into shreds.

[0191] Furthermore, the shredding device 8 also includes:

[0192] Two toothed plates 83 are respectively disposed on the outside of two cutter rollers 81. Each toothed plate 83 has a plurality of cleaning teeth 831 at one end near the cutter roller 81, and each cleaning tooth 831 is inserted between two adjacent cutters 82.

[0193] The grinding wheel 84 is positioned close to the cutter 82. The axis of the grinding wheel 84 is parallel to the axis of the cutter roller 81. The grinding wheel 84 can rotate around its own axis. At the same time, the grinding wheel 84 can also reciprocate along the axial direction and radial direction of the cutter roller 81, so that the grinding wheel 84 moves closer to or further away from the cutter 82.

[0194] The negative pressure adsorption mechanism includes a suction nozzle 85, the suction end of which is located near the cleaning teeth 831, and the suction nozzle 85 can reciprocate along the axial direction of the cutter roller 81.

[0195] When the shredding device 8 is working, the toothed plate 83 can comb the mixture of pectin and debris between two adjacent cutters 82, causing it to detach from the cutter roller 81 and preventing it from adhering to the cutter 82 and causing the cutter roller 81 to jam or be damaged. At the same time, when the grinding wheel 84 contacts the cutter 82, the grinding wheel 84 can sharpen the dull cutter 82 to make it sharp, thereby ensuring that the shredding width of the stem meets the standard. While ensuring the normal operation of the shredding device 8, the maintenance cost of the shredding device 8 is reduced and manpower is saved.

[0196] Furthermore, the stems output by the shredding device 8 will fall onto the tobacco dust screening device 9. The tobacco dust screening device 9 is a linear vibrating screen with a screen at the bottom. When the stems are vibrating and conveyed inside the linear vibrating screen, the stems run above the screen, and the tobacco dust in the stems can pass through the screen, thereby removing the tobacco dust from the stems.

[0197] Further reference Figure 19 The moisture control device 10 includes:

[0198] The tunnel-type vibrating trough includes a trough body 101 and a cover plate 102 covering the trough body 101, with a tunnel formed between the trough body 101 and the cover plate 102;

[0199] A heating plate 103 is located at the bottom of the tank 101. The heating plate 103 is used to heat the skewer inside the tunnel-type vibrating trough.

[0200] In this embodiment, the stem shreds output by the shredding device 8 fall into a tunnel-type vibrating trough for conveying. By installing a heating plate 103 inside the tunnel-type vibrating trough, the stem shreds can be heated and dried simultaneously during conveying to adjust their moisture content. When the stem shreds run inside the tunnel, airflow is generated, ensuring uniform heating and enhancing the consistency of their moisture content. Furthermore, this embodiment utilizes a moisture detector 56 to detect the actual moisture content of the stem shreds that have not yet entered the moisture control device 10. The heating temperature of the heating plate 103 can be adjusted based on this actual moisture content to ensure that the moisture content of the stem shreds output from the moisture control device 10 reaches the standard moisture content range required in the production process, thereby better ensuring the quality of the stem shreds and preventing mold growth.

[0201] Furthermore, the discharge end of the tunnel-type vibrating trough is connected to the middle of the remixing conveyor belt 11. The tunnel-type vibrating trough can transport the stems to the remixing conveyor belt 11. The upstream end of the remixing conveyor belt 11 is used to receive the tobacco output from the separation device 3. The remixing conveyor belt 11 can remix the filamentous stems made from the stem sticks into the tobacco online to recycle the material.

[0202] While the present invention has been illustrated and described with reference to certain preferred embodiments, those skilled in the art should understand that the above description is a further detailed explanation of the invention in conjunction with specific embodiments, and should not be construed as limiting the specific implementation of the invention to these descriptions. Various changes in form and detail can be made by those skilled in the art, including several simple deductions or substitutions, without departing from the spirit and scope of the invention.

Claims

1. A method for reusing stem strips, characterized in that, include: Separation steps: The stem bundle is pulled and cut to loosen it, and the tobacco and stems contained in the loosened stem bundle are separated by air separation so that the tobacco and stems can be recycled separately. Tableting step: Compress the stem sticks into stem tablets; Shredding step: Cut the stem slices into shreds; The method for recycling stem filaments is applied to a stem filament recycling system, which includes a separation device for implementing the separation step. The separation device includes: The conveying channel has a feed inlet at the top front and a discharge outlet at the bottom rear. A first feeding plate is disposed in the conveying channel, with the front end of the first feeding plate located below the feed inlet and the rear end of the first feeding plate located above the discharge outlet. The second feeding plate is located above the first feeding plate. The upper surface of the first feeding plate and the lower surface of the second feeding plate are spaced a certain distance apart. The front end of the second feeding plate is located behind the front end of the first feeding plate, and the rear end of the second feeding plate is located behind the rear end of the first feeding plate. The first loosening roller group is located on the front side of the front end of the second feeding plate. There is a certain gap between the bottom of the first loosening roller group and the upper surface of the first feeding plate. The first loosening roller group is used to transport the skein bundle from the first feeding plate to the second feeding plate and loosen the skein bundle. A drive mechanism is directly or indirectly connected to the first feeding plate and the second feeding plate. The drive mechanism is used to drive the first feeding plate and the second feeding plate to vibrate so as to convey the material from front to back. A first fan is located below the discharge port. The first fan is used to blow air onto the material output from the second feeding plate to separate the tobacco and stems in the material.

2. The method for reusing stem strips as described in claim 1, characterized in that, Before the separation step, a feeding step is also included, which includes: conveying the skein bundle stored in the silo to the downstream equipment to feed the downstream equipment, and adjusting the conveying flow rate of the skein bundle according to the material height in the silo; When the material height in the hopper is greater than the preset height, the feed flow rate of the filament bundle decreases; When the material height in the hopper is less than the preset height, the feed flow rate of the filament bundle increases.

3. The method for reusing stem strips as described in claim 1, characterized in that, Between the separation step and the tableting step, a purification step is further included, which includes: The first negative pressure gas is used to adsorb dust in the material, so that the stem and the dust are separated; The stems and stalks in the material are adsorbed by a third negative pressure gas, so that the stems and stalks are separated from the tobacco residue and hard materials in the material.

4. The method for reusing stem strips as described in claim 3, characterized in that, Between the impurity removal step and the tableting step, there is also a material spreading step, which includes: conveying the stem sticks into the conveying vibration trough and using the vibration of the conveying vibration trough to spread the stem sticks flat so that the thickness of the stem sticks is uniform.

5. The method for reusing stem strips as described in claim 1, characterized in that, Following the shredding step, a tobacco dust sieving step is also included, which includes: conveying the tobacco stems into a linear vibrating screen, the bottom of which is provided with a filter screen, and using the vibration of the linear vibrating screen to remove the tobacco dust from the tobacco stems.

6. The method for reusing stem strips as described in claim 5, characterized in that, Following the tobacco dust sieving step, a moisture control step is also included, which includes: Obtain the actual water content within the stem; The stems are heated, and the heating temperature is adjusted according to the actual moisture content.

7. The method for reusing stem strips as described in claim 6, characterized in that, Following the moisture control step, a tobacco re-blending step is also included, which includes: re-blending the stems into the tobacco online.

8. A stem-and-skewer recycling system, characterized in that, The method for reusing stem strips according to any one of claims 1 to 7 is characterized by comprising: A separation device is used to pull and cut the bundle of stems to loosen it and separate the tobacco and stems contained in the loosened bundle of stems. A tableting device is used to compress the stem sticks into stem tablets; A shredding device for cutting the stem slices into shreds; A control system is used to control the operation of the separating device, the tableting device, and the shredding device; The separation device includes: The conveying channel has a feed inlet at the top front and a discharge outlet at the bottom rear. A first feeding plate is disposed in the conveying channel, with the front end of the first feeding plate located below the feed inlet and the rear end of the first feeding plate located above the discharge outlet. The second feeding plate is located above the first feeding plate. The upper surface of the first feeding plate and the lower surface of the second feeding plate are spaced a certain distance apart. The front end of the second feeding plate is located behind the front end of the first feeding plate, and the rear end of the second feeding plate is located behind the rear end of the first feeding plate. The first loosening roller group is located on the front side of the front end of the second feeding plate. There is a certain gap between the bottom of the first loosening roller group and the upper surface of the first feeding plate. The first loosening roller group is used to transport the skein bundle from the first feeding plate to the second feeding plate and loosen the skein bundle. A drive mechanism is directly or indirectly connected to the first feeding plate and the second feeding plate. The drive mechanism is used to drive the first feeding plate and the second feeding plate to vibrate so as to convey the material from front to back. A first fan is located below the discharge port. The first fan is used to blow air onto the material output from the second feeding plate to separate the tobacco and stems in the material.

9. The stem-and-silk recycling system as described in claim 8, characterized in that, The separation device further includes: The third feeding plate is located above the second feeding plate. The upper surface of the second feeding plate and the lower surface of the third feeding plate are spaced a certain distance apart. The front end of the third feeding plate is located behind the front end of the second feeding plate, and the rear end of the third feeding plate is located in front of the rear end of the second feeding plate. The second loosening roller group is located on the front side of the front end of the third feeding plate. There is a certain gap between the bottom of the second loosening roller group and the upper surface of the second feeding plate. The second loosening roller group is used to transport the skein bundle from the second feeding plate to the third feeding plate and loosen the skein bundle. The third loosening roller group is located above the middle of the third feeding plate. There is a certain gap between the bottom of the third loosening roller group and the upper surface of the third feeding plate. The third loosening roller group is used to transport the skein bundle from the front of the third feeding plate to the rear of the third feeding plate and loosen the skein bundle.

10. The stem-and-silk recycling system as described in claim 9, characterized in that, The first loosening roller group, the second loosening roller group, and the third loosening roller group have the same structure, each including: The upper loosening roller extends in a direction perpendicular to the extension direction of the conveying channel. A plurality of first roller nails are provided on the circumferential surface of the upper loosening roller, and each first roller nail extends radially along the upper loosening roller. The lower loosening roller is parallel to the upper loosening roller and located below the upper loosening roller. The lower loosening roller has a plurality of second roller nails on its circumferential surface. Each second roller nail extends radially along the lower loosening roller. The upper loosening roller and the lower loosening roller rotate in the same direction. The rotational speed of the upper loosening roller is greater than that of the lower loosening roller. A first motor is used to provide power for the rotation of the upper loosening roller and the lower loosening roller.

11. The stem-making and skewer recycling system as described in claim 8, characterized in that, The tablet pressing device includes two parallel pressure rollers, which are each capable of rotating around their own axis in opposite directions. There is a certain gap between the circumferential surfaces of the two pressure rollers, allowing the tablet to pass between them. When the tablet passes between the two pressure rollers, the two pressure rollers apply a squeezing force to the tablet to compress it into a tablet.

12. The stem-and-silk recycling system as described in claim 11, characterized in that, The tablet pressing device further includes: The two coating rollers are parallel to the pressure rollers, and the circumferential surfaces of the two coating rollers are respectively in contact with the circumferential surfaces of the two pressure rollers. The two coating rollers can rotate around their own axes. Two liquid storage tanks are located below the two coating rollers, respectively. The liquid storage tanks are used to hold cleaning liquid and are provided with liquid replenishment ports. Each liquid storage tank is provided with at least one absorbent felt. The absorbent felt is at least partially immersed in the cleaning liquid, and the upper end of the absorbent felt is in contact with the coating roller. Two cleaning scrapers are respectively disposed on one side of the two coating rollers along the rotation direction of the two pressure rollers. The two cleaning scrapers are tangent to the circumferential surface of the two pressure rollers. The cleaning scrapers are used to remove the adhesive on the circumferential surface of the pressure rollers.

13. The stem-and-silk recycling system as described in claim 8, characterized in that, The slicing device includes two parallel cutting rollers, which can rotate around their own axes respectively, and there is a gap between the two cutting rollers. Each cutting roller is provided with a plurality of cutting blades at equal intervals along its axial direction, and each cutting blade is arranged in a ring around the circumference of the cutting roller. When the stem passes between the two cutting rollers, the cutting blade can cut the stem into stem filaments.

14. The stem-making and skewer recycling system as described in claim 13, characterized in that, The shredding device further includes: Two toothed plates are respectively disposed on the outer side of the two cutter rollers. Each toothed plate has a plurality of cleaning teeth at one end near the cutter roller, and each cleaning tooth is inserted between two adjacent cutters. A grinding wheel is positioned close to the cutter, the axis of the grinding wheel is parallel to the axis of the cutter roller, the grinding wheel can rotate around its own axis, and the grinding wheel can reciprocate along the axial direction and the radial direction of the cutter roller. The negative pressure adsorption mechanism includes a suction nozzle, the suction end of which is located close to the cleaning teeth, and the suction nozzle can reciprocate along the axial direction of the cutter roller.

15. The stem-and-silk recycling system as described in claim 8, characterized in that, A feeding device is provided upstream of the stem and filament separation device, the feeding device being used to supply material to the separation device; the feeding device includes: The hopper has a storage chamber inside. A hopper inlet is located at the top of the hopper, and a hopper outlet is located at the bottom of the hopper. Both the hopper inlet and the hopper outlet are connected to the storage chamber. A high-level detection unit, a medium-level detection unit, and a low-level detection unit are arranged sequentially from top to bottom in the storage chamber. The high-level detection unit, the medium-level detection unit, and the low-level detection unit are electrically connected to the control system. The first belt conveyor is located below the discharge port of the hopper, and the discharge port of the hopper is spaced a certain distance from the upper surface of the belt conveyor; A discharge roller is disposed on one side of the discharge port of the hopper along the conveying direction of the upper surface of the first belt conveyor. The extension direction of the discharge roller is perpendicular to the conveying direction of the upper surface of the first belt conveyor. The circumferential surface of the discharge roller is spaced at a certain distance from the upper surface of the belt conveyor. The discharge roller can rotate around its own axis. Multiple roller nails are evenly distributed on the circumferential surface of the discharge roller. The roller nails extend along the radial direction of the discharge roller.

16. The stem-and-silk recycling system as described in claim 15, characterized in that, An adjustment mechanism is connected to the discharge roller. This mechanism adjusts the vertical height of the discharge roller to change the minimum distance between the circumferential surface of the discharge roller and the upper surface of the belt conveyor. The adjustment mechanism includes: Two adjusting plates are respectively disposed at both ends of the discharge roller, and both ends of the discharge roller are respectively hinged to the two adjusting plates; the adjusting plates are provided with threaded holes, and the two side walls of the hopper spaced apart along the axial direction of the discharge roller are respectively provided with strip-shaped holes extending in the vertical direction; or, the adjusting plates are provided with strip-shaped holes extending in the vertical direction, and the two side walls of the hopper spaced apart along the axial direction of the discharge roller are respectively provided with threaded holes. Multiple bolts pass through each of the strip holes and are threadedly connected to the corresponding threaded holes, so that the adjusting plate is fixed to the side wall of the hopper.

17. The stem-making and skewer recycling system as described in claim 8, characterized in that, A purification device is provided between the separation device and the tableting device, the purification device being used to remove impurities from the tablet stem; the purification device includes: The first dust collector has a first feed inlet and a first air inlet on its side wall and a first discharge outlet at its bottom. The first feed inlet is used to input materials into the first dust collector, and the first air inlet is used to introduce a first negative pressure gas into the first dust collector. The adsorption force generated by the first negative pressure gas can adsorb the dust in the material and will not adsorb the stems in the material. The descaling pipe has a third inlet at its upper end and a third outlet at its lower end. The third inlet is connected to the first outlet. A third suction port is provided on the side wall of the descaling pipe. The third suction port is used to introduce a third negative pressure gas into the descaling pipe. The adsorption force generated by the third negative pressure gas can adsorb the stems and stalks in the material, but will not adsorb the tar and hard objects in the material. The second dust collection box has a second feed inlet and a second air intake on its side wall, and a second discharge outlet at its bottom. The second feed inlet is connected to the third air intake. The stalks in the descaling pipe can enter the second dust collection box sequentially through the third air intake and the second feed inlet under the adsorption of the third negative pressure gas. The second air intake is used to introduce the second negative pressure gas into the first dust collection box. The adsorption force generated by the second negative pressure gas can adsorb the dust in the stalks, but will not adsorb the stalks themselves. A negative pressure generating mechanism is connected to the first air intake, the second air intake, and the third air intake. The negative pressure generating mechanism is used to provide the first negative pressure gas, the second negative pressure gas, and the third negative pressure gas.

18. The stem-making and skewer recycling system as described in claim 17, characterized in that, A material spreading device is also provided between the impurity removal device and the tableting device. The material spreading device is used to flatten the stems. The material spreading device is a conveying trough, which includes a third conveying section, a fourth conveying section and a fifth conveying section arranged sequentially along the conveying direction of the material. The extension directions of the third conveying section, the fourth conveying section and the fifth conveying section have a certain angle with the horizontal direction so as to convey the stems from a low position to a high position. The width of the third conveying section is smaller than the width of the fifth conveying section, and the width of the fourth conveying section gradually increases along the conveying direction of the material.

19. The stem-and-silk recycling system as described in claim 18, characterized in that, A moisture detector is installed above the third conveying section, and the material spreading device also includes: The second conveying section has its discharge end connected to the inlet end of the third conveying section. The second conveying section extends horizontally, and its width gradually decreases along the conveying direction of the material. The first conveying section has its discharge end connected to the inlet end of the second conveying section. The first conveying section extends horizontally and its width is greater than that of the third conveying section.

20. The stem-and-silk recycling system as described in claim 19, characterized in that, Downstream of the shredding device, along the conveying direction of the material, a tobacco dust screening device is provided. The tobacco dust screening device is a linear vibrating screen with a screen at the bottom. The linear vibrating screen can remove tobacco dust from the stems through vibration.

21. The stem-making and skewer recycling system as described in claim 20, characterized in that, Downstream of the tobacco dust screening device, along the conveying direction of the material, a moisture control device is provided, the moisture control device comprising: A tunnel-type vibratory trough includes a trough body and a cover plate covering the trough body, wherein a tunnel is formed between the trough body and the cover plate; A heating plate is located at the bottom of the groove, and the heating plate is used to heat the stems in the tunnel-type vibrating groove.

22. The stem-making and skewer recycling system as described in claim 21, characterized in that, Downstream of the moisture control device, a back-mixing belt conveyor is provided along the conveying direction of the material. The discharge end of the tunnel-type vibrating trough is connected to the middle of the back-mixing belt conveyor. The tunnel-type vibrating trough can transport the stems to the back-mixing belt conveyor. The upstream end of the back-mixing belt conveyor is used to receive the tobacco output from the separation device. The back-mixing belt conveyor is used to back-mix the stems into the tobacco online.

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