CN-118120954-B - Method and system for recycling stem cut tobacco

Abstract

The invention provides a cut stem shred recycling method which comprises the steps of pulling and shearing cut stem shred clusters to loosen the cut stem shred clusters, separating cut tobacco and cut stems contained in the loose cut stem clusters by utilizing air separation to recover the cut tobacco and the cut stems respectively, pressing the cut stems into cut stem sheets, and cutting the cut stem sheets into cut stems. According to the invention, tobacco shreds and stem sticks contained in the cut stem clusters are separated, and then the stem sticks are pressed and cut into slices, so that the cut stems can be made into cut stems and added into cigarettes for recycling, thereby avoiding material waste and reducing manufacturing cost. The invention also provides a stem cut-making recycling system which is used for realizing the stem cut-making recycling method.

Inventors

• YU YUNLIU
• CHEN JIANQIANG
• ZHOU QUAN
• GONG XING
• WANG CUNXIN
• ZHU JIANLING
• ZHOU LEI
• FENG YINZONG
• Wu Zuomei

Assignees

• 贵州中烟工业有限责任公司

Dates

Publication Date

20260508

Application Date

20221202

Claims (20)

1. 1. The stem stick cut tobacco recycling method is characterized by comprising the following steps of: pulling and shearing the cut stem clusters to loosen the cut stem clusters, and separating cut tobacco and stem sticks contained in the loosened cut stem clusters by utilizing air separation to recover the cut tobacco and the stem sticks respectively; a tabletting step, namely extruding the stem sticks into stem slices; a shredding step, cutting the stem slices into cut stems; the stem shred recycling method is applied to a stem shred recycling system, the stem shred recycling system comprises a separation device for realizing the separation step, and the separation device comprises the following components: A feed inlet is arranged above the front part of the conveying channel, and a discharge outlet is arranged below the rear part of the conveying channel; The first feeding plate is arranged in the conveying channel, the front end of the first feeding plate is positioned below the feeding hole, and the rear end of the first feeding plate is positioned above the discharging hole; the second feeding plate is arranged above the first feeding plate, a certain distance is reserved between the upper surface of the first feeding plate and the lower surface of the second feeding plate, the front end of the second feeding plate is positioned at the rear side of the front end of the first feeding plate, and the rear end of the second feeding plate is positioned at the rear side of the rear end of the first feeding plate; the first loosening roller set is arranged at the front side of the front end of the second feeding plate, a certain gap is reserved between the bottom of the first loosening roller set and the upper surface of the first feeding plate, and the first loosening roller set is used for conveying the cut stem clusters from the first feeding plate to the second feeding plate and loosening the cut stem clusters; The driving mechanism is directly or indirectly connected with the first feeding plate and the second feeding plate and is used for driving the first feeding plate and the second feeding plate to vibrate so as to convey materials from front to back; the first fan is arranged below the discharge port and is used for blowing air to the materials output by the second feeding plate so as to separate cut tobacco and stem sticks in the materials.
2. 2. The method for recycling cut stems according to claim 1, further comprising a feeding step, before the separating step, of conveying the cut stems stored in the bin to a downstream device to feed the downstream device and adjusting the conveying flow rate of the cut stems according to the height of the material in the bin; When the height of the materials in the bin is larger than a preset height, the feeding flow of the cut stem clusters is reduced; when the height of the materials in the bin is smaller than the preset height, the feeding flow of the cut stem clusters is increased.
3. 3. The method for recycling cut stems according to claim 1, further comprising a step of removing impurities between the separating step and the tabletting step, the step of removing impurities comprising: Adsorbing dust in the material by using first negative pressure gas so as to separate the stem sticks from the dust; and adsorbing the stem in the material by using a third negative pressure gas so as to separate the stem from the tobacco gum scale and the hard matters in the material.
4. 4. The method for recycling cut stems according to claim 3, further comprising a spreading step between the impurity removing step and the tabletting step, wherein the spreading step comprises the steps of conveying the cut stems into a conveying vibration groove and flattening the cut stems by utilizing the vibration of the conveying vibration groove so as to make the thickness of the cut stems uniform.
5. 5. The method for recycling stem sticks according to claim 1, further comprising a tobacco powder screening step after the shredding step, wherein the tobacco powder screening step comprises the steps of conveying stem sticks into a linear vibrating screen, wherein the bottom of the linear vibrating screen is arranged on a filter screen, and removing tobacco powder in the stem sticks by utilizing vibration of the linear vibrating screen.
6. 6. The method of claim 5, further comprising a moisture control step after the tobacco end screening step, the moisture control step comprising: acquiring the actual water content in the cut stems; And heating the cut stems, and adjusting the heating temperature according to the actual water content.
7. 7. The method for recycling cut stems according to claim 6, further comprising a cut tobacco back-blending step after the moisture control step, wherein the cut tobacco back-blending step comprises online back-blending the cut stems into the cut tobacco.
8. 8. A stem cut-making recycling system for realizing the stem cut-making recycling method according to any one of claims 1 to 7, characterized by comprising: the separating device is used for pulling and shearing the cut stem clusters to loosen the cut stem clusters and separating cut tobacco and cut stems contained in the loosened cut stem clusters; the tabletting device is used for extruding the stem sticks into stem slices; the shredding device is used for cutting the stem slices into cut stems; The control system is used for controlling the operation of the separating device, the tabletting device and the shredding device; The separation device includes: A feed inlet is arranged above the front part of the conveying channel, and a discharge outlet is arranged below the rear part of the conveying channel; The first feeding plate is arranged in the conveying channel, the front end of the first feeding plate is positioned below the feeding hole, and the rear end of the first feeding plate is positioned above the discharging hole; the second feeding plate is arranged above the first feeding plate, a certain distance is reserved between the upper surface of the first feeding plate and the lower surface of the second feeding plate, the front end of the second feeding plate is positioned at the rear side of the front end of the first feeding plate, and the rear end of the second feeding plate is positioned at the rear side of the rear end of the first feeding plate; the first loosening roller set is arranged at the front side of the front end of the second feeding plate, a certain gap is reserved between the bottom of the first loosening roller set and the upper surface of the first feeding plate, and the first loosening roller set is used for conveying the cut stem clusters from the first feeding plate to the second feeding plate and loosening the cut stem clusters; The driving mechanism is directly or indirectly connected with the first feeding plate and the second feeding plate and is used for driving the first feeding plate and the second feeding plate to vibrate so as to convey materials from front to back; the first fan is arranged below the discharge port and is used for blowing air to the materials output by the second feeding plate so as to separate cut tobacco and stem sticks in the materials.
9. 9. The stem chip recycling system of claim 8, wherein the separation device further comprises: The third feeding plate is arranged above the second feeding plate, a certain distance is reserved between the upper surface of the second feeding plate and the lower surface of the third feeding plate, the front end of the third feeding plate is positioned at the rear side of the front end of the second feeding plate, and the rear end of the third feeding plate is positioned at the front side of the rear end of the second feeding plate; The second loosening roller set is arranged at the front side of the front end of the third feeding plate, a certain gap is reserved between the bottom of the second loosening roller set and the upper surface of the second feeding plate, and the second loosening roller set is used for conveying the cut stem clusters from the second feeding plate to the third feeding plate and loosening the cut stem clusters; The third loosening roller set is arranged above the middle of the third feeding plate, a certain gap is reserved between the bottom of the third loosening roller set and the upper surface of the third feeding plate, and the third loosening roller set is used for conveying the cut stem clusters from the front of the third feeding plate to the rear of the third feeding plate and loosening the cut stem clusters.
10. 10. The stem chip recycling system of claim 9, wherein the first loosening roller set, the second loosening roller set, and the third loosening roller set are identical in structure, each comprising: the extending direction of the upper loosening roller is perpendicular to the extending direction of the conveying channel, a plurality of first roller nails are arranged on the circumferential surface of the upper loosening roller, and each first roller nail extends along the radial direction of the upper loosening roller; The lower loosening roller is parallel to the upper loosening roller and arranged below the upper loosening roller, a plurality of second roller nails are arranged on the circumferential surface of the lower loosening roller, each second roller nail extends along the radial direction of the lower loosening roller, the rotation direction of the upper loosening roller is the same as that of the lower loosening roller, and the rotation speed of the upper loosening roller is greater than that of the lower loosening roller; A first motor for powering the rotation of the upper and lower loosening rollers.
11. 11. The cut stem making and recycling system according to claim 8, wherein the sheeting device comprises two compression rollers which are arranged in parallel, the two compression rollers can rotate around their own axes respectively and have opposite rotation directions, a certain gap is formed between the circumferential surfaces of the two compression rollers, the stem can pass between the two compression rollers, and when the stem passes between the two compression rollers, the two compression rollers can apply extrusion force to the stem so as to extrude the stem into the stem sheet.
12. 12. The stem chip recycling system of claim 11, wherein the sheeting apparatus further comprises: The two liquid coating rollers are parallel to the press rolls, the circumferential surfaces of the two liquid coating rollers are respectively attached to the circumferential surfaces of the two press rolls, and the two liquid coating rollers can respectively rotate around the axes of the two liquid coating rollers; The two liquid storage tanks are respectively positioned below the two liquid coating rollers and are used for containing cleaning liquid, liquid supplementing openings are formed in the liquid storage tanks, at least one water absorption felt is arranged in each liquid storage tank, at least part of the water absorption felt is soaked in the cleaning liquid, and the upper ends of the water absorption felts are in contact with the liquid coating rollers; The two cleaning scrapers are respectively arranged on one sides of the two liquid coating rollers along the rotation direction of the two pressing rollers, the two cleaning scrapers are respectively tangent to the circumferential surfaces of the two pressing rollers, and the cleaning scrapers are used for removing the adhesive on the circumferential surfaces of the pressing rollers.
13. 13. The system of claim 8, wherein the shredding device comprises two parallel knife rolls, the two knife rolls can rotate around their axes respectively, a gap is provided between the two knife rolls, a plurality of cutters are arranged on each knife roll at equal intervals along the axial direction of the knife rolls, each cutter is annular and surrounds the circumferential surface of the knife roll, and when the stem piece passes between the two knife rolls, the cutters can cut the stem piece into the stem shreds.
14. 14. The stem chip recycling system of claim 13, wherein said shredding means further comprises: The two toothed plates are respectively arranged at the outer sides of the two knife rolls, one end of each toothed plate, which is close to the knife rolls, is provided with a plurality of cleaning teeth, and each cleaning tooth is inserted between two adjacent cutters; The grinding wheel is arranged 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 the axis of the grinding wheel, and the grinding wheel can reciprocate along the axial direction of the cutter roller and the radial direction of the cutter roller; The negative pressure adsorption mechanism comprises a suction nozzle, the suction end of the suction nozzle is close to the cleaning teeth, and the suction nozzle can reciprocate along the axial direction of the knife roller.
15. 15. The system of claim 8, wherein a feeding device is arranged upstream of the stem cluster separation device and is used for feeding the separation device, and the feeding device comprises: The automatic feeding device comprises a storage cavity, wherein a storage cavity is arranged in the storage cavity, a storage bin feeding hole is formed in the storage cavity, a storage bin discharging hole is formed in the storage cavity, the storage bin feeding hole and the storage bin discharging hole are both communicated with the storage cavity, a high material level detection unit, a medium material level detection unit and a low material level detection unit are sequentially arranged in the storage cavity from top to bottom, and the high material level detection unit, the medium material level detection unit and the low material level detection unit are respectively and electrically connected with a control system; The first belt conveyor is arranged below the bin discharge port, and the bin discharge port is spaced from the upper surface of the belt conveyor by a certain distance; The discharging roller is arranged on one side of the discharging hole of the storage bin along the conveying direction of the upper surface of the first belt conveyor, the extending direction of the discharging roller is perpendicular to the conveying direction of the upper surface of the first belt conveyor, a certain distance is reserved between the circumferential surface of the discharging roller and the upper surface of the belt conveyor, the discharging roller can rotate around the axis of the discharging roller, a plurality of roller nails are uniformly distributed on the circumferential surface of the discharging roller, and the roller nails extend along the radial direction of the discharging roller.
16. 16. The stem and filament recycling system of claim 15, wherein the discharge roller is connected with an adjusting mechanism for adjusting 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 adjusting mechanism comprising: The two adjusting plates are respectively arranged at two ends of the discharging roller, and the two ends of the discharging roller are respectively hinged with the two adjusting plates; the adjusting plate is provided with threaded holes, two side walls of the storage bin, which are arranged at intervals along the axial direction of the discharging roller, are respectively provided with strip-shaped holes extending along the vertical direction, or the adjusting plate is provided with strip-shaped holes extending along the vertical direction, and two side walls of the storage bin, which are arranged at intervals along the axial direction of the discharging roller, are respectively provided with threaded holes; and the bolts penetrate through the strip-shaped holes respectively and are in threaded connection with the corresponding threaded holes, so that the adjusting plate is fixed on the side wall of the storage bin.
17. 17. The stem signature cut-making recycling system of claim 8, wherein a trash remover is arranged between the separating device and the tabletting device and is used for removing trash in the stem signature, and the trash remover comprises: The first dust removing box is provided with a first feeding hole and a first air suction hole on the side wall, a first discharging hole is arranged at the bottom of the first dust removing box, the first feeding hole is used for inputting materials into the first dust removing box, the first air suction hole is used for introducing first negative pressure gas into the first dust removing box, and the adsorption force generated by the first negative pressure gas can adsorb dust in the materials and cannot adsorb stems in the materials; The upper end of the descaling pipeline is provided with a third feeding hole, the lower end of the descaling pipeline is provided with a third discharging hole, the third feeding hole is communicated with the first discharging hole, the side wall of the descaling pipeline is provided with a third air suction hole, the third air suction hole is used for introducing third negative pressure gas into the descaling pipeline, and the adsorption force generated by the third negative pressure gas can adsorb stem sticks in the materials and can not adsorb tobacco gum scales and hard matters in the materials; The second dust removal box is provided with a second feeding hole and a second air suction hole on the side wall, a second discharging hole is arranged at the bottom of the second dust removal box, the second feeding hole is communicated with the third air suction hole, the stem in the descaling pipeline can sequentially pass through the third air suction hole and the second feeding hole under the adsorption action of third negative pressure gas and enter the second dust removal box, the second air suction hole is used for introducing second negative pressure gas into the first dust removal box, and the adsorption force generated by the second negative pressure gas can adsorb dust in the stem and can not adsorb the stem; The negative pressure generating mechanism is communicated with the first air suction port, the second air suction port and the third air suction port and is used for providing the first negative pressure gas, the second negative pressure gas and the third negative pressure gas.
18. 18. The system of claim 17, wherein a spreading device is further arranged between the impurity removing device and the tabletting device, the spreading device is used for spreading the sticks, the spreading device is a conveying vibration groove, the spreading device comprises a third conveying section, a fourth conveying section and a fifth conveying section which are sequentially arranged along the conveying direction of the materials, a certain angle is formed between the extending direction of the third conveying section, the extending direction of the fourth conveying section and the extending direction of the fifth conveying section and the horizontal direction, so that the sticks are conveyed 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 materials.
19. 19. The stem chip making and recycling system according to claim 18, wherein a moisture detector is provided above the third conveying section, and the spreading device further comprises: the discharging end of the second conveying section is connected with the feeding end of the third conveying section, the second conveying section extends along the horizontal direction, and the width of the second conveying section gradually decreases along the conveying direction of the materials; The discharging end of the first conveying section is connected with the feeding end of the second conveying section, the first conveying section extends along the horizontal direction, and the width of the first conveying section is larger than that of the third conveying section.
20. 20. The stem and shred recycling system of claim 19, wherein along the conveying direction of said material, a tobacco shred screening device is provided downstream of said shredding device, said tobacco shred screening device is a linear vibrating screen, a screen is provided at the bottom of said linear vibrating screen, and said linear vibrating screen is capable of removing tobacco shreds from said stem shreds by vibrating.

Description

Method and system for recycling stem cut tobacco Technical Field The invention relates to the technical field of tobacco processing devices, in particular to a stem cut tobacco recycling method and system. Background In the industrial production of cigarettes, the stem sticks contained in the cut tobacco not only can produce the conditions of popping, flameout, head dropping, cigarette puncturing and the like, but also can cause the problems of strip running, blockage, abrasion of parts of a cigarette making machine and the like in the production process of cigarettes. Therefore, in the cigarette production process, the stems in the tobacco shreds are removed through secondary air separation to ensure the purity of the tobacco shreds. However, a lot of tobacco shreds are mixed in the stem sticks removed by secondary air separation, and the tobacco shreds and the stem sticks are entangled together to form stem shred clusters with different sizes. In the prior art, the removed stem clusters are not reasonably utilized and are usually treated as waste materials, so that the waste of materials is caused, and the manufacturing cost is increased. Disclosure of Invention The invention aims to solve the problems of material waste and high manufacturing cost caused by the fact that no removed cut stem clusters are reasonably utilized at present. The invention provides a method and a system for recycling cut tobacco and cut stems in cut stem clusters, which can be used for avoiding material waste and reducing manufacturing cost. The embodiment of the invention provides a method for recycling stem cut tobacco, which comprises the following steps: pulling and shearing the cut stem clusters to loosen the cut stem clusters, and separating cut tobacco and stem sticks contained in the loosened cut stem clusters by utilizing air separation to recover the cut tobacco and the stem sticks respectively; The step of tabletting, namely extruding the stem sticks into stem slices; and a shredding step, namely cutting the stem slices into cut stem. Optionally, before the separation step, the method further comprises a feeding step, wherein the feeding step comprises the steps of conveying the cut stem clusters stored in the bin to downstream equipment to feed the downstream equipment, and adjusting the conveying flow of the cut stem clusters according to the height of the materials in the bin; When the height of the materials in the bin is larger than the preset height, the feeding flow of the cut stem clusters is reduced; when the height of the materials in the bin is smaller than the preset height, the feeding flow of the cut stem clusters is increased. Optionally, between the separating step and the tabletting step, a impurity removing step is further included, and the impurity removing step includes: adsorbing dust in the material by using first negative pressure gas so as to separate the stem sticks from the dust; and adsorbing the stem in the material by using the third negative pressure gas so as to separate the stem from the tobacco gum scale and the hard matters in the material. Optionally, a spreading step is further included between the impurity removal step and the tabletting step, wherein the spreading step comprises the steps of conveying the stem sticks into a conveying vibration groove, and flattening the stem sticks by utilizing the vibration of the conveying vibration groove so as to make the thickness of the stem sticks uniform. Optionally, after the shredding step, a tobacco powder screening step is further included, wherein the tobacco powder screening step comprises the steps of conveying cut stems into a linear vibrating screen, arranging the bottom of the linear vibrating screen on a filter screen, and removing tobacco powder in the cut stems by utilizing vibration of the linear vibrating screen. Optionally, after the tobacco powder screening step, a moisture regulating step is further included, the moisture regulating step including: obtaining the actual water content in the cut stems; And heating the cut stems, and adjusting the heating temperature according to the actual water content. Optionally, after the moisture regulating step, the method further comprises a tobacco shred back-blending step, wherein the tobacco shred back-blending step comprises the step of online back-blending the cut stems into the tobacco shreds. The embodiment of the invention also provides a stem cut-making recycling system for realizing any of the above-mentioned stem cut-making recycling methods, which comprises: The separating device is used for pulling and shearing the cut stem clusters to loosen the cut stem clusters and separating cut tobacco and cut stems contained in the loosened cut stem clusters; the tabletting device is used for extruding the stem sticks into stem slices; the shredding device is used for cutting the stem slices into cut stem threads; And the control system is used for controlling the operation of the s