Device and method for removing foreign matter from cut tobacco on a cutting line

Abstract

The cut tobacco foreign matter removal device for the cutting line includes a raw cut tobacco supply and transport unit (N1), a heavy foreign matter removal unit (N2), a cut tobacco recovery unit (N3), a medium weight foreign matter removal unit (N4), a cut tobacco humidification unit (N5), and a light weight foreign matter removal unit (N6). It can effectively remove foreign matter from the cut tobacco, improve the purity of the cut tobacco, and replenish the moisture of the cut tobacco to improve the quality of the cut tobacco. Furthermore, the present invention relates to a foreign matter removal method using the cut tobacco foreign matter removal device for the cutting line.

Description

[Technical field]

[0001] The present invention relates to the technical field of tobacco processing, and more particularly to an apparatus and method for removing foreign matter from cut tobacco in a cutting line. [Background technology]

[0002] The foreign matter in cut tobacco during the cigarette shredding process mainly includes slivers (which can be further subdivided into thick and thin slivers), clumped cut tobacco, metal, wood chips, plastic, paper pieces, feathers, etc., and their properties are significantly different from those of cut tobacco, which pose relatively large problems in the subsequent rolling process and the final cigarette product, so they need to be removed before the cut tobacco is rolled into a cigarette product. Compared to cut tobacco, the foreign matter in cut tobacco can be divided into three types based on specific gravity attributes: heavy foreign matter, medium foreign matter, and light foreign matter. Here, heavy foreign matter refers to foreign matter with a higher specific gravity than normal cut tobacco, such as metal chips, wood chips, plastic particles, thick slivers, clumped cut tobacco, and cut tobacco intertwined with heavy foreign matter. Light foreign matter refers to foreign matter with a lower specific gravity than normal cut tobacco, such as feathers and shredded tobacco scraps. Medium weight foreign matter is foreign matter with a specific gravity close to that of normal cut tobacco, such as fine slivers.

[0003] Effectively removing foreign matter from cut tobacco in the cigarette shredding production process is of great practical significance in terms of improving the purity and use value of cut tobacco, and stabilizing the quality of cigarette products. At present, domestic cigarette companies basically adopt flexible winnowing to remove foreign matter from cut tobacco in the shredding line, which is effective in removing heavy and light foreign matter to a certain extent, but it has problems such as high cut tobacco loss (the proportion of cut tobacco contained in the heavy foreign matter removed is high), low effect of removing foreign matter from cut tobacco (medium-weight foreign matter cannot be effectively removed), and large impact on the physical quality index of cut tobacco (large water dispersion loss of cut tobacco). Effectively removing various foreign matter from cut tobacco and keeping the physical quality index of cut tobacco stable after processing is a difficult problem that needs to be solved as soon as possible.

[0004] In order to solve the above problems, the present invention is proposed. Summary of the Invention [Problem to be solved by the invention]

[0005] The object of the present invention is to provide an apparatus for removing foreign matter from cut tobacco on a shredding line and an operating method thereof, in order to solve the shortcomings of the prior art. The apparatus of the present invention can effectively remove heavy, medium and light foreign matter from cut tobacco, significantly improve the purity of the cut tobacco, and can also humidify the cut tobacco to compensate for the loss of moisture from the cut tobacco during the removal process, thereby meeting the moisture content requirements of the cut tobacco, improving the quality of the cut tobacco, and stabilizing the quality of cigarette products. [Means for solving the problem]

[0006] The technical solution of the present invention is as follows:

[0007] The first aspect of the present invention discloses a cut tobacco foreign matter removal device for a cutting line, comprising a raw cut tobacco supply and transport unit N1, a heavy foreign matter removal unit N2, a cut tobacco recovery unit N3, a medium weight foreign matter removal unit N4, a cut tobacco humidification unit N5, and a light weight foreign matter removal unit N6; The raw cut tobacco supply and transport unit N1 is located upstream of the heavy foreign matter removal unit N2, which is located above the cut tobacco recovery unit N3 and below the medium weight foreign matter removal unit N4, the cut tobacco humidification unit N5 is located downstream of the medium weight foreign matter removal unit N4, and the light weight foreign matter removal unit N6 is located downstream of the cut tobacco humidification unit N5.

[0008] Preferably, the raw cut tobacco supply and transport unit N1 comprises a horizontally arranged pneumatic transport pipe 2 and a raw cut tobacco supply device 3 located above the pneumatic transport pipe 2 and connected via a supply airlock 4, one end of the opening of the pneumatic transport pipe 2 being a pneumatic transport inlet 1 connected to a positive pressure blower.

[0009] The heavy foreign matter removal unit N2 has one cylindrical heavy foreign matter winding separation tube 5 arranged in the vertical direction, and the other end of the opening of the pneumatic transport pipe 2 is connected so as to communicate with the middle and lower wall of the heavy foreign matter winding separation tube 5.

[0010] The cut tobacco recovery unit N3 comprises a mechanical shattering device 6, an inclined guide pipe 16, a positive pressure air duct 17, a cut tobacco wind sorting and separation device 21, and a recovered cut tobacco transport pipe 15. The inclined guide pipe 16 is disposed at an incline, with its lower end connected to the discharge port of the mechanical shattering device 6 and the inlet of the positive pressure air duct 17, and its upper end connected to the supply port of the wind sorting and separation device 21. A positive pressure blower is connected to one end of the positive pressure air duct 17, and the discharge port of the wind sorting and separation device 21 is connected to the inlet of the positive pressure air duct 17. The mouth is connected to one end of the opening of the recovered cut tobacco transport pipe 15, which is arranged at an angle and has the other end of its opening connected to communicate with the middle and upper wall of the heavy foreign matter winding and separation tube 5, the lower part of the winding and separation device 21 is a heavy foreign matter discharge outlet 23, the discharge outlet is provided with a heavy foreign matter discharge airlock 22, and the mechanical scattering device 6 is connected to the bottom nozzle of the heavy foreign matter winding and separation tube 5.

[0011] The medium-weight foreign object removal unit N4 includes a horizontally arranged pneumatic transport square tube 7, an image recognition system 8, a medium-weight foreign object removal system 11, and a medium-weight foreign object drop tube 18, where the image recognition system 8 includes an image collection camera 9 and a light source 10, the medium-weight foreign object removal system 11 includes a compressed air ejection tube 12, an electromagnetic valve 13, and a detection recognition signal servo controller 14, the pneumatic transport square tube 7 is connected to the upper nozzle of the heavy foreign object winding separation tube 5, and the image recognition system 8 is adjacent to the medium-weight foreign object removal system 11. The medium-weight foreign object drop tube 18 is disposed upstream of the system 11, the image recognition system 8 and the medium-weight foreign object removal system 11 are disposed above the horizontal pneumatic transport square pipe 7, and the medium-weight foreign object drop tube 18 is disposed below the horizontal pneumatic transport square pipe 7 and opposite the medium-weight foreign object removal system 11, the medium-weight foreign object drop tube 18 is disposed vertically and its upper nozzle is connected so as to communicate with the wall of the horizontal pneumatic transport square pipe 7, the lower nozzle of the medium-weight foreign object drop tube 18 is a medium-weight foreign object discharge port 20, and the nozzle is provided with a medium-weight foreign object discharge airlock 19.

[0012] The cut tobacco humidifying unit N5 comprises a vertically arranged pneumatic transport round tube 24, a plurality of humidifying nozzles 25 arranged symmetrically on the inner wall of the pneumatic transport round tube 24, and a horizontal flow guide tube 26, the bottom mouth of which is connected to the horizontal flow guide tube 26 and the top mouth of which is connected to the outlet of the horizontally arranged pneumatic transport square tube 7.

[0013] The light foreign matter removal unit N6 has one vertically arranged light foreign matter winnowing and separating tube 27, the upper end of which is connected to a horizontally arranged light foreign matter transport pipe 30 and the bottom end of which is connected to a refined cut tobacco discharge airlock 28 and a refined cut tobacco collecting device 29, the other end of the opening of the light foreign matter transport pipe 30 is connected to a light foreign matter collecting device 31, and the discharge outlet of the horizontal guide pipe 25 is connected to communicate with the middle and lower side wall of the light foreign matter winnowing and separating tube 26.

[0014] Preferably, the speed of the positive pressure air entering the heavy foreign matter winnowing and separating cylinder 5 from the pneumatic transport inlet 1 is in the range of 2.0 m / s to 8.0 m / s (seconds).

[0015] Preferably, the width dimension of the horizontal pneumatic transportation square tube 7 is 0.5 m to 2.0 m, and the height dimension is 0.1 m to 0.5 m. The horizontal pneumatic transportation square tube 7 is made of a transparent material such as organic glass or reinforced glass so that image collection and foreign object recognition can be performed under illumination by the light source 10.

[0016] Preferably, the speed of the positive pressure air flowing from the inclined guide pipe 16 into the winnowing separation device 21 is 2.0 m / s to 6.0 m / s.

[0017] Preferably, the speed of the positive pressure air flowing from the horizontal guide pipe 26 into the light-weight foreign matter winnowing and separating tube 27 is in the range of 0.5 m / s to 1.0 m / s.

[0018] A second aspect of the present invention discloses a method for removing foreign matter from cut tobacco on a shredding line using the above-mentioned cut tobacco foreign matter removal device, the method including the following steps of removing heavy weight foreign matter, removing medium weight foreign matter, humidifying cut tobacco, and removing light weight foreign matter, the steps being specifically as follows:

[0019] Step 1: Remove heavy objects The raw cut tobacco is introduced into the pneumatic transport pipe 2 via the raw cut tobacco supply device 3 and the supply air lock 4, and is then driven into the heavy foreign matter winnowing and separating tube 5 by a positive pressure blower at the pneumatic transport inlet 1. The vertically upward positive pressure wind force entering the heavy foreign matter winnowing and separating tube 5 in combination with the gravity of the raw material itself causes medium and light weight foreign matter as well as the cut tobacco to enter the top of the heavy foreign matter winnowing and separating tube 5, and are transported into the horizontally arranged square pneumatic transport pipe 7. On the other hand, heavy foreign matter with a high density is allowed to fall and enter the mechanical scattering device 6. After being thoroughly loosened using the mechanical scattering device 6, the heavy foreign matter is caused to enter the winnowing and separation device 21 along the inclined guide pipe 16 by the action of the positive pressure wind force from the positive pressure blower pipe 17. The vertically upward positive pressure wind force entering the winnowing and separation device 21 works in combination with the gravity of the raw material itself to return the separated lighter cut tobacco portion along the recovered cut tobacco transport pipe 15 back into the heavy foreign matter winnowing and separation tube 5, and then transported into the horizontally arranged pneumatic transport square pipe 7. The separated heavy foreign matter is then discharged through the heavy foreign matter discharge airlock 22 and the heavy foreign matter discharge outlet 23.

[0020] Step 2: Remove medium weight foreign objects In step 1, for the medium weight foreign objects and light weight foreign objects as well as the cut tobacco inside the horizontally arranged pneumatic transport square tube 7, the foreign objects in the cut tobacco are recognized by an image recognition system 8 and removed by a medium weight foreign object removal system 11. The cut tobacco from which the medium weight foreign objects have been removed continues to move downstream along the horizontal pneumatic transport square tube 7 and enters a vertically arranged pneumatic transport round tube 24, and the removed medium weight foreign objects are dropped into a medium weight foreign object drop tube 18 and discharged via a medium weight foreign object discharge airlock 19 and a medium weight foreign object discharge port 20.

[0021] Step 3: Moisturize the cut tobacco In step 2, the cut tobacco from which medium-weight foreign matter has been removed and which has entered the vertically arranged pneumatic transport round pipes 24 is humidified using steam ejected from a humidifying nozzle 25 while moving downward, and the humidified cut tobacco is transported through a horizontal guide pipe 26 into a light-weight foreign matter winnowing and separating tube 27.

[0022] Step 4: Remove light debris In step 3, the humidified cut tobacco is transported into the light foreign matter winnowing and separating tube 27, and due to the combined action of a relatively weak vertically upward positive pressure wind entering the light foreign matter winnowing and separating tube 27 and the gravity of the raw material itself, the cut tobacco falls downward along the light foreign matter winnowing and separating tube 27 and enters the refined cut tobacco collecting device 29 through the refined cut tobacco discharge airlock 28 to become qualified refined cut tobacco, and the light foreign matter is blown upward along the light foreign matter winnowing and separating tube 27 and enters the light foreign matter collecting device 31 through the light foreign matter transport pipe 30 and is discharged.

[0023] Compared to the prior art, the present invention provides the following advantageous effects:

[0024] 1. The cut tobacco foreign matter removal device of the present invention includes core components such as a heavy foreign matter removal unit, a medium weight foreign matter removal unit and a light weight foreign matter removal unit, among which heavy and light foreign matters are removed by a winnowing method, and medium weight foreign matters are removed by an image recognition and accurate blowing method, thereby realizing the removal of foreign matters that are heavier than cut tobacco, medium weight foreign matters and light weight foreign matters, and effectively realizing the removal of all foreign matters in cut tobacco, and further significantly improving the purity of cut tobacco, and enhancing the quality and use value of cut tobacco.

[0025] 2. According to the device for removing foreign matter from cut tobacco in the shredding line of the present invention, the wind transport speed of each component is precisely controlled. According to the research of the present invention, it is found that when the wind speed of the positive pressure wind is greater than 2.5 m / s, the buoyancy is greater than gravity, and the cut tobacco is transported with the positive pressure wind; when the wind speed of the positive pressure wind is less than 2.5 m / s, the gravity is greater than buoyancy, and the cut tobacco is not transported with the positive pressure wind but falls by gravity; when the wind speed of the positive pressure wind is greater than 8.0 m / s, the heavy foreign matter in the cut tobacco cannot be effectively removed; and when the wind speed range of the positive pressure wind is less than 1.0 m / s, the light foreign matter can be effectively removed without affecting the normal descent of the cut tobacco. Therefore, according to the present invention, the range of the wind speed of the wind selection, which is a key process parameter suitable for removing impurities by wind selection of tobacco raw materials, is determined.

[0026] 3. The cut tobacco foreign matter removal device of the shredding line of the present invention is equipped with a cut tobacco recovery unit, and for cut tobacco contained in heavy foreign matter (clumped cut tobacco and some cut tobacco entangled with heavy foreign matter), it is possible to fully recover the cut tobacco contained therein by combining mechanical shattering with flexible winnowing and separation processing, thereby effectively reducing the loss of cut tobacco in the process of removing heavy foreign matter and increasing economic profits.

[0027] 4. The cut tobacco foreign matter removal device of the present invention further includes a cut tobacco humidification unit, which adopts a humidification method using symmetrical, downwardly angled humidification nozzles to compensate for the loss of cut tobacco moisture content during the entire foreign matter removal process, thereby meeting the requirements for the cut tobacco moisture content indicators in the subsequent rolling process, improving the stability of the cut tobacco moisture content, and further stabilizing the quality of cigarette products.

[0028] 5. The cut tobacco foreign matter removal device of the present invention uses a positive pressure air transport method to supply raw material, and all core parts such as the heavy foreign matter removal unit, the medium weight foreign matter removal unit and the cut tobacco humidification unit use pneumatic transport methods. This makes it possible to increase the dispersion of cut tobacco and the processing flow rate of cut tobacco compared to the conventional cut line's method of using a vibrating conveyor belt to spread it thinly during flexible wind sorting supply, which is used to supply the raw material in a flexible wind sorting manner. This is advantageous for large-scale industrial production.

[0029] 6. The shredded tobacco foreign matter removal device of the present invention has a compact and simple structure, excellent operability and applicability, and has high application potential and value for popularization and application. [Brief description of the drawings]

[0030] In order to more clearly describe the embodiments of the present invention and the technical solutions of the prior art, the following will briefly describe the accompanying drawings required for the description of the embodiments or the prior art. It is clear that the accompanying drawings in the following description are only some embodiments of the present invention, and those skilled in the art can obtain other accompanying drawings from these accompanying drawings without creative efforts.

[0031] [Figure 1] 1 is a schematic diagram of the overall structure of a foreign matter removing device for shredded tobacco in a shredding line according to the present invention;

[0032] [Explanation of symbols] N1 Raw cut tobacco supply and transportation unit; N2 Heavy Duty Foreign Object Removal Unit, N3 Tobacco Collection Unit, N4 Medium weight foreign body removal unit, N5 Tobacco Humidification Unit, N6 Lightweight foreign object removal unit, 1 Pneumatic transport inlet, 2 pneumatic transport pipes, 3. Raw tobacco cutting supply device; 4 Supply airlock, 5 Heavy foreign object winding separation tube, 6 Mechanical dispersion equipment, 7 Pneumatic conveying square tube, 8 Image recognition system, 9 image acquisition cameras, 10 light sources, 11 Medium weight foreign object removal system; 12 compressed air outlet pipe, 13 Solenoid valve, 14 detects the identification signal of the servo controller; 15. Collected tobacco transport pipes; 16 Inclined diversion pipe, 17 positive pressure air duct, 18 Medium weight foreign object drop tube, 19 Medium weight foreign object ejection airlock, 20 Medium weight foreign object outlet, 21 Tobacco wind sorting and separation device, 22 Heavy foreign object ejection airlock, 23 Heavy foreign object discharge port, 24 Pneumatic transport round pipe, 25 Humidification nozzle, 26 Horizontal diversion pipe, 27 Winding separator for light-weight foreign objects, 28 refined tobacco exhaust airlock, 29 Refined tobacco collection equipment; 30 Lightweight pneumatic transport pipe for foreign objects, 31 A lightweight foreign object collection device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0033] The present invention will be further described below in conjunction with the accompanying drawings and examples, which are not intended to be limitations on the technical means of the present invention, and any changes or improvements made based on the teachings of the present invention are all within the protection scope of the present invention.

[0034] Working Example As shown in Figure 1, in a first embodiment of the present invention, a cut tobacco foreign matter removal device for a shredding line comprises a raw cut tobacco supply and transport unit N1, a heavy foreign matter removal unit N2, a cut tobacco recovery unit N3, a medium weight foreign matter removal unit N4, a cut tobacco humidification unit N5, and a light weight foreign matter removal unit N6, wherein the raw cut tobacco supply and transport unit N1 is located upstream of the heavy foreign matter removal unit N2, the heavy foreign matter removal unit N2 is located above the cut tobacco recovery unit N3 and below the medium weight foreign matter removal unit N4, the cut tobacco humidification unit N5 is located downstream of the medium weight foreign matter removal unit N4, and the light weight foreign matter removal unit N6 is located downstream of the cut tobacco humidification unit N5.

[0035] Here, the raw cut tobacco supply and transport unit N1 comprises a horizontally arranged pneumatic transport pipe 2 and a raw cut tobacco supply device 3 located above the pneumatic transport pipe 2 and connected via a supply airlock 4, and one end of the opening of the pneumatic transport pipe 2 is a pneumatic transport inlet 1 connected to a positive pressure blower.

[0036] The heavy foreign matter removal unit N2 has one cylindrical heavy foreign matter winding separation tube 5 arranged in the vertical direction, and the other end of the opening of the pneumatic transport pipe 2 is connected so as to communicate with the middle and lower wall of the heavy foreign matter winding separation tube 5.

[0037] The cut tobacco recovery unit N3 comprises a mechanical shattering device 6, an inclined guide pipe 16, a positive pressure air duct 17, a cut tobacco wind sorting and separation device 21, and a recovered cut tobacco transport pipe 15. The inclined guide pipe 16 is disposed at an incline, with its lower end connected to the discharge port of the mechanical shattering device 6 and the inlet of the positive pressure air duct 17, and its upper end connected to the supply port of the wind sorting and separation device 21. A positive pressure blower is connected to one end of the positive pressure air duct 17, and the discharge port of the wind sorting and separation device 21 is connected to the inlet of the positive pressure air duct 17. The mouth is connected to one end of the opening of the recovered cut tobacco transport pipe 15, which is arranged at an angle and has the other end of its opening connected to communicate with the middle and upper wall of the heavy foreign matter winding and separation tube 5, the lower part of the winding and separation device 21 is a heavy foreign matter discharge outlet 23, the discharge outlet is provided with a heavy foreign matter discharge airlock 22, and the mechanical scattering device 6 is connected to the bottom nozzle of the heavy foreign matter winding and separation tube 5.

[0038] The medium-weight foreign object removal unit N4 includes a horizontally arranged pneumatic transport square tube 7, an image recognition system 8, a medium-weight foreign object removal system 11, and a medium-weight foreign object drop tube 18, where the image recognition system 8 includes an image collection camera 9 and a light source 10, the medium-weight foreign object removal system 11 includes a compressed air ejection tube 12, an electromagnetic valve 13, and a detection recognition signal servo controller 14, the pneumatic transport square tube 7 is connected to the upper nozzle of the heavy foreign object winding separation tube 5, and the image recognition system 8 is adjacent to the medium-weight foreign object removal system 11. The medium-weight foreign object drop tube 18 is disposed upstream of the system 11, the image recognition system 8 and the medium-weight foreign object removal system 11 are disposed above the horizontal pneumatic transport square pipe 7, and the medium-weight foreign object drop tube 18 is disposed below the horizontal pneumatic transport square pipe 7 and opposite the medium-weight foreign object removal system 11, the medium-weight foreign object drop tube 18 is disposed vertically and its upper nozzle is connected so as to communicate with the wall of the horizontal pneumatic transport square pipe 7, the lower nozzle of the medium-weight foreign object drop tube 18 is a medium-weight foreign object discharge port 20, and the nozzle is provided with a medium-weight foreign object discharge airlock 19.

[0039] The cut tobacco humidifying unit N5 comprises a vertically arranged pneumatic transport round tube 24, a plurality of humidifying nozzles 25 arranged symmetrically on the inner wall of the pneumatic transport round tube 24, and a horizontal flow guide tube 26, the bottom mouth of which is connected to the horizontal flow guide tube 26 and the top mouth of which is connected to the outlet of the horizontally arranged pneumatic transport square tube 7.

[0040] The light foreign matter removal unit N6 has one vertically arranged light foreign matter winnowing and separating tube 27, the upper end of which is connected to a horizontally arranged light foreign matter transport pipe 30 and the bottom end of which is connected to a refined cut tobacco discharge airlock 28 and a refined cut tobacco collecting device 29. The other end of the opening of the light foreign matter transport pipe 30 is connected to a light foreign matter collecting device 31, and the discharge outlet of the horizontal guide pipe 26 is connected to communicate with the middle and lower side wall of the light foreign matter winnowing and separating tube 27.

[0041] Here, the wind speed of the positive pressure air entering the heavy foreign matter winnowing and separation cylinder 5 from the pneumatic transport inlet 1 is 2.0 m / s to 8.0 m / s, and in this embodiment, 3.5 m / s is preferable.

[0042] Here, the width dimension of the horizontal pneumatic transportation square tube 7 is 0.5 m to 2.0 m, preferably 1.0 m, and the height dimension is 0.1 m to 0.5 m, preferably 0.2 m. The horizontal pneumatic transportation square tube 7 is made of a transparent material such as organic glass or reinforced glass, and in this embodiment, reinforced glass is preferable so that image collection and foreign object recognition can be performed under illumination by the light source 10.

[0043] Here, the wind speed of the positive pressure wind entering the winnowing separation device 21 from the inclined guide pipe 16 is 2.0 m / s to 6.0 m / s, and in this embodiment, 2.8 m / s is preferable.

[0044] Here, the range of wind speed of the positive pressure wind entering the light weight foreign matter winnowing and separating cylinder 27 from the horizontal flow guide pipe 26 is 0.5 m / s to 1.0 m / s, and 0.5 m / s is suitable in this embodiment.

[0045] A second aspect of the present invention discloses a method for removing foreign matter from cut tobacco on a shredding line using the above-mentioned cut tobacco foreign matter removal device, the method including the following steps of removing heavy weight foreign matter, removing medium weight foreign matter, humidifying cut tobacco, and removing light weight foreign matter, the steps being specifically as follows:

[0046] Step 1: Remove heavy objects The raw cut tobacco is introduced into the pneumatic transport pipe 2 via the raw cut tobacco supply device 3 and the supply air lock 4, and is then driven into the heavy foreign matter winnowing and separating tube 5 by a positive pressure blower at the pneumatic transport inlet 1. The vertically upward positive pressure wind force entering the heavy foreign matter winnowing and separating tube 5 in combination with the gravity of the raw material itself causes medium and light weight foreign matter as well as the cut tobacco to enter the top of the heavy foreign matter winnowing and separating tube 5, and are transported into the horizontally arranged square pneumatic transport pipe 7. On the other hand, heavy foreign matter with a high density is allowed to fall and enter the mechanical scattering device 6. After being thoroughly loosened using the mechanical scattering device 6, the heavy foreign matter is caused to enter the wind sorting and separation device 21 along the inclined guide pipe 16 by the action of the positive pressure wind force from the positive pressure blower pipe 17. The vertically upward positive pressure wind force entering the wind sorting and separation device 21 works in combination with the gravity of the raw material itself to return the separated lighter cut tobacco portion along the recovered cut tobacco transport pipe 15 back into the heavy foreign matter wind sorting and separation tube 5, and then transported into the horizontally arranged pneumatic transport square pipe 7. The separated heavy foreign matter is then discharged through the heavy foreign matter discharge airlock 22 and the heavy foreign matter discharge outlet 23.

[0047] Step 2: Remove medium weight foreign objects In step 1, for the medium-weight foreign objects and light-weight foreign objects as well as the cut tobacco inside the horizontally arranged pneumatic transport square tube 7, the foreign objects in the cut tobacco are recognized by an image recognition system 8 and removed by a medium-weight foreign object removal system 11. The cut tobacco from which the medium-weight foreign objects have been removed continues to move downstream along the horizontal pneumatic transport square tube 7 and enters a vertically arranged pneumatic transport round tube 24, and the removed medium-weight foreign objects are dropped into a medium-weight foreign object drop tube 18 and discharged via a medium-weight foreign object discharge airlock 19 and a medium-weight foreign object discharge port 20.

[0048] Step 3: Moisturize the cut tobacco In step 2, the cut tobacco from which medium-weight foreign matter has been removed and which has entered the vertically arranged pneumatic transport round pipes 24 is humidified using steam ejected from a humidifying nozzle 25 while moving downward, and the humidified cut tobacco is transported through a horizontal guide pipe 26 into a light-weight foreign matter winnowing and separating tube 27.

[0049] Step 4: Remove light debris In step 3, the humidified cut tobacco is transported into the light foreign matter winnowing and separating tube 27, and due to the combined action of a relatively weak vertically upward positive pressure wind entering the light foreign matter winnowing and separating tube 27 and the gravity of the raw material itself, the cut tobacco falls downward along the light foreign matter winnowing and separating tube 27 and enters the refined cut tobacco collecting device 29 through the refined cut tobacco discharge airlock 28 to become qualified refined cut tobacco, and the light foreign matter is blown upward along the light foreign matter winnowing and separating tube 27 and enters the light foreign matter collecting device 31 through the light foreign matter transport pipe 30 and is discharged.

[0050] The subject of the experiment in this embodiment is 1000 kg of cut tobacco obtained by drying the deboned cut tobacco from the cutting line of a certain cigarette brand, and the moisture content of the cut tobacco is 12.98%. The foreign matter in the cut tobacco is mainly scribes and clumped cut tobacco, and the test shows that the foreign matter content of the cut tobacco is 7.65%. The above cut tobacco is divided into two equal parts, each of which weighs 500 kg. The cut tobacco foreign matter removal device of the cutting line of the present invention and the FS417A type deboned cut flexible wind sorter of the conventional cutting line are used to remove foreign matter from the cut tobacco, and the purity and moisture content of the cut tobacco after the treatment are tested. The effects of removing foreign matter from cut tobacco by the two methods are compared and analyzed, and the results are shown in Table 1. The calculation formula for the purity of cut tobacco is [(1-amount of foreign matter in cut tobacco) / mass of cut tobacco]×100%. TIFF2025506587000002.tif44170

[0051] It can be seen from Table 1 that, compared with the FS417A type deboning shredding flexible wind sorting machine of a conventional shredding line, when processing the same cut tobacco, the removal of foreign matter from cut tobacco using the cut tobacco foreign matter removal device of the shredding line of the present invention is more complete, the purity of the cut tobacco is higher, and the difference in moisture content of the cut tobacco before and after processing is smaller. This shows that the adoption of the device of the present invention can effectively remove foreign matter from cut tobacco and significantly increase the purity of the cut tobacco, while keeping the moisture content of the cut tobacco substantially unaffected, which can further increase the use value of the cut tobacco and stabilize the quality of tobacco products, thereby improving the core competence of cigarette manufacturers and promoting the sustained development of high-quality cigarette brands.

[0052] Although the specific embodiments of the present invention have been described in detail above, the technical means proposed by the present invention are not limited to the above methods. Any equivalent modifications and changes made by those skilled in the art to the technology proposed by the present invention without departing from the basic principles of the technology of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A foreign matter removal device for shredded tobacco on a shredding line, comprising: The apparatus comprises a raw cut tobacco supply and transport unit (N1), a heavy foreign matter removal unit (N2), a cut tobacco recovery unit (N3), a medium weight foreign matter removal unit (N4), a cut tobacco humidification unit (N5), and a light weight foreign matter removal unit (N6), the raw cut tobacco supply and transport unit (N1) is located upstream of the heavy foreign matter removal unit (N2), the heavy foreign matter removal unit (N2) is located above the cut tobacco recovery unit (N3) and below the medium weight foreign matter removal unit (N4), the cut tobacco humidification unit (N5) is located downstream of the medium weight foreign matter removal unit (N4), and the light weight foreign matter removal unit (N6) is located downstream of the cut tobacco humidification unit (N5); A foreign body removal device for shredded tobacco on the cutting line.

2. The raw material cut tobacco supply and transport unit (N1) comprises a horizontally disposed pneumatic transport pipe (2) and a raw material cut tobacco supply device (3) located above the pneumatic transport pipe (2) and connected via a supply airlock (4), one end of the opening of the pneumatic transport pipe (2) being a pneumatic transport inlet (1) connected to a positive pressure blower; The heavy foreign matter removal unit (N2) includes one cylindrical heavy foreign matter windscreen separation cylinder (5) arranged in the vertical direction, and the other end of the opening of the pneumatic transport pipe (2) is connected to communicate with the middle and lower walls of the heavy foreign matter windscreen separation cylinder (5), The cut tobacco recovery unit (N3) comprises a mechanical shattering device (6), an inclined guide pipe (16), a positive pressure blower pipe (17), a cut tobacco wind sorting and separation device (21), and a recovered cut tobacco transport pipe (15). The inclined guide pipe (16) is disposed at an incline, with its lower end connected to the discharge outlet of the mechanical shattering device (6) and the inlet of the positive pressure blower pipe (17) and its upper end connected to the supply port of the wind sorting and separation device (21). A positive pressure blower is connected to one end of the positive pressure blower pipe (17), and the wind sorting and separation device (21) is disposed at an incline. the outlet of the winding separation device (21) is connected to one end of the opening of a recovered cut tobacco transport pipe (15), the recovered cut tobacco transport pipe (15) is arranged at an angle, the other end of the opening is connected to communicate with the middle and upper wall of the heavy foreign matter winding separation tube (5), the lower part of the winding separation device (21) is a heavy foreign matter outlet (23), the outlet is provided with a heavy foreign matter outlet airlock (22), and the mechanical scattering device (6) is connected to the bottom nozzle of the heavy foreign matter winding separation tube (5); The medium-weight foreign object removal unit (N4) comprises a horizontally arranged pneumatic transport square pipe (7), an image recognition system (8), a medium-weight foreign object removal system (11), and a medium-weight foreign object drop tube (18). The image recognition system (8) comprises an image collection camera (9) and a light source (10). The medium-weight foreign object removal system (11) comprises a compressed air ejection pipe (12), an electromagnetic valve (13), and a detection recognition signal servo controller (14). The pneumatic transport square pipe (7) is connected to the upper nozzle of the heavy foreign object winding separation tube (5). The image recognition system (8) is adjacent to the medium-weight foreign object removal system (11) and is configured to detect and recognize the medium-weight foreign object. The medium-weight foreign object removal system (11) is disposed upstream of the medium-weight foreign object removal system (11), the image recognition system (8) and the medium-weight foreign object removal system (11) are disposed above the horizontal pneumatic transport square pipe (7), the medium-weight foreign object drop tube (18) is disposed below the horizontal pneumatic transport square pipe (7) and opposite the medium-weight foreign object removal system (11), the medium-weight foreign object drop tube (18) is disposed vertically, and its upper nozzle is connected so as to communicate with the wall of the horizontal pneumatic transport square pipe (7), the lower nozzle of the medium-weight foreign object drop tube (18) is a medium-weight foreign object discharge port (20), and the nozzle is provided with a medium-weight foreign object discharge airlock (19); The cut tobacco humidifying unit (N5) comprises a vertically arranged pneumatic transport round pipe (24), a plurality of humidifying nozzles (25) on the inner wall of the pneumatic transport round pipe (24) and symmetrically arranged thereon, and a horizontal guiding pipe (26), the bottom opening of the pneumatic transport round pipe (24) being connected to the horizontal guiding pipe (26) and the top opening being connected to the outlet of the horizontally arranged pneumatic transport square pipe (7); The light foreign matter removal unit (N6) comprises one vertically disposed light foreign matter winnowing and separating tube (27), the upper end of which is connected to a horizontally disposed light foreign matter transport pipe (30), the bottom end of which is connected to a refined cut tobacco discharge airlock (28) and a refined cut tobacco collecting device (29), the other end of the light foreign matter transport pipe (30) is connected to a light foreign matter collecting device (31), and the discharge port of the horizontal guide pipe (26) is connected to a side wall of the middle and lower part of the light foreign matter winnowing and separating tube (27).

2. The shredded tobacco foreign matter removal device of claim 1.

3. The speed range of the positive pressure air entering the heavy foreign matter winnowing and separation tube (5) from the pneumatic transport inlet (1) is 2.0 m / s to 8.0 m / s.

3. The apparatus for removing foreign matter from shredded tobacco on a shredding line according to claim 2.

4. The width dimension of the horizontal pneumatic transportation square tube (7) is 0.5m to 2.0m, the height dimension is 0.1m to 0.5m, and the horizontal pneumatic transportation square tube (7) is made of a transparent material.

3. The apparatus for removing foreign matter from shredded tobacco on a shredding line according to claim 2.

5. The wind speed of the positive pressure wind entering the wind separation device (21) from the inclined guide pipe (16) is 2.0 m / s to 6.0 m / s.

3. The apparatus for removing foreign matter from shredded tobacco on a shredding line according to claim 2.

6. The speed of the positive pressure air entering the light weight foreign matter windscreen (27) from the horizontal guide pipe (26) is in the range of 0.5 m / s to 1.0 m / s.

3. The apparatus for removing foreign matter from shredded tobacco on a shredding line according to claim 2.

7. The shredded tobacco foreign matter removing device of any one of claims 1 to 6 is used in a shredded tobacco line, comprising the steps of removing heavy foreign matter, removing medium-weight foreign matter, humidifying shredded tobacco, and removing light-weight foreign matter. A method for removing foreign matter from cut tobacco on a cutting line, comprising: Step 1: Remove heavy objects The raw cut tobacco is introduced into a pneumatic transport pipe (2) via a raw cut tobacco supply device (3) and a supply air lock (4), and is then introduced into a heavy foreign object winnowing and separating tube (5) by a positive pressure blower at the pneumatic transport inlet (1). The vertically upward positive pressure wind force entering the heavy foreign object winnowing and separating tube (5) and the gravity of the raw material itself work in combination to drive medium-weight and light-weight foreign objects as well as the cut tobacco into the top of the heavy foreign object winnowing and separating tube (5), where they are transported into a horizontally arranged pneumatic transport square tube (7). Heavy foreign objects with high density are then dropped and introduced into a mechanically-dispersed device (6), and the mechanically-dispersed device (7) is then transported into a pneumatic transport square tube (8). After being sufficiently loosened using the mechanical dispersing device (6), the material is forced to enter the winnowing and separation device (21) along the inclined guide pipe (16) by the action of positive air pressure from the positive pressure blower pipe (17), and the separated lighter cut tobacco portion is returned along the recovered cut tobacco transport pipe (15) into the heavy foreign matter winnowing and separation tube (5) by the combined action of the vertically upward positive air pressure entering the winnowing and separation device (21) and the gravity of the raw material itself, and then transported into the horizontally arranged pneumatic transport square pipe (7), and the separated heavy foreign matter is discharged via the heavy foreign matter discharge airlock (22) and the heavy foreign matter discharge port (23). Step 2: Remove medium weight debris In step 1, for the medium-weight foreign objects and light-weight foreign objects as well as the cut tobacco in the horizontally arranged pneumatic transport square tube (7), the foreign objects in the cut tobacco are recognized by an image recognition system (8) and removed by a medium-weight foreign object removal system (11). The cut tobacco from which the medium-weight foreign objects have been removed is then moved downstream along the horizontal pneumatic transport square tube (7) and enters a vertically arranged pneumatic transport round tube (24). The removed medium-weight foreign objects are then dropped into a medium-weight foreign object drop tube (18) and discharged via a medium-weight foreign object discharge airlock (19) and a medium-weight foreign object discharge port (20). Step 3: Moisturize the cut tobacco In step 2, the cut tobacco from which medium-weight foreign matter has been removed and which has entered the vertically arranged pneumatic transport round pipes (24) is humidified using steam ejected from a humidifying nozzle (25) while moving downward, and the humidified cut tobacco is transported through a horizontal guide pipe (26) into a light-weight foreign matter winnowing and separating tube (27). Step 4: Remove light debris In step 3, the humidified cut tobacco is transported into the light foreign matter winnowing and separating tube (27), and due to the combined action of a relatively weak vertically upward positive pressure wind entering the light foreign matter winnowing and separating tube (27) and the gravity of the raw material itself, the humidified cut tobacco falls downward along the light foreign matter winnowing and separating tube (27) and enters the refined cut tobacco collecting device (29) through the refined cut tobacco discharge airlock (28) to become qualified refined cut tobacco, and the light foreign matter is blown upward along the light foreign matter winnowing and separating tube (27) and enters the light foreign matter collecting device (31) through the light foreign matter transport pipe (30).

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