A humidifying drum that reduces waterlogging of tobacco leaves during processing

Abstract

The present invention discloses a humidifying drum capable of reducing water-soaked tobacco leaves during tobacco processing, comprising a fixed feed plate, a cylinder body with a horizontal axis that can rotate along the feed plate, a vibrating conveyor extending into the cylinder body, a steam nozzle, and a feeding nozzle extending through the feed plate, a portion of the steam nozzle outside the cylinder body being sheathed with an insulation sleeve fixedly connected thereto, the insulation sleeve being arranged at an angle, a closed insulation steam chamber being formed between the insulation sleeve and the steam nozzle, the insulation steam chamber being wrapped around the steam nozzle body, a steam inlet pipe being connected to the upper end of the insulation sleeve, and a steam outlet pipe being connected to the lower end of the insulation sleeve. High-temperature steam is introduced into the insulation sleeve to heat and insulate the steam flowing through the steam nozzle body, thereby preventing condensation from forming in the steam nozzle body, improving the quality of the steam sprayed into the cylinder body of the humidifying drum, reducing the probability of water-soaked tobacco leaves, and ensuring the quality of the cigarettes.

Description

Technical Field

[0001] The invention relates to the technical field of tobacco processing equipment, and in particular to a humidifying roller capable of reducing waterlogging of tobacco leaves during the tobacco processing process. Background Art

[0002] During the production of tobacco products, some processes use humidification rollers to heat, humidify and add materials to the tobacco leaves to improve the tobacco leaves' processing resistance, reduce breakage, and improve the tobacco's flavor.

[0003] Steam is used in these processes for heating and humidifying the materials and for feeding. However, in actual processing, steam quality deteriorates due to long steam transport distances and other factors, resulting in a high concentration of condensed water. Despite hydrophobic treatment and centralized discharge, significant amounts of condensed water remain in the steam pipes and steam. During production, this condensed water is sprayed into the drum along with the steam. If this condensed water splashes onto the tobacco leaves, it will cause water stains. Furthermore, because the feeding process requires steam atomization, the atomized liquid material is sprayed into the drum and then mixed with steam for feeding. Some of this atomized mixture, influenced by the airflow, adheres to the drum's feed plate or inner wall. This causes some tobacco leaves and fines to adhere to these plates or inner walls during processing, which, over time, can result in water stains. Water stains seriously affect the quality of the cigarettes. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a humidifying drum that can reduce water stains on tobacco leaves during processing, and is used to solve the problem that condensed water is sprayed into the drum along with steam, and then the condensed water is sprayed onto the tobacco leaves, forming water stains on the tobacco leaves.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] A humidifying drum capable of reducing waterlogging of tobacco leaves during processing comprises a fixed feed plate, the feed plate being provided with a cylinder body with a horizontal axis that can rotate along the feed plate, a vibrating conveyor, a steam nozzle and a feeding nozzle penetrating the feed plate, the inner end of which extends into the cylinder body, the portion of the steam nozzle outside the cylinder body being covered with a heat-insulating sleeve fixedly connected thereto, the heat-insulating sleeve being arranged at an angle, a closed heat-insulating steam chamber being formed between the heat-insulating sleeve and the steam nozzle body, the heat-insulating steam chamber being wrapped around the outside of the steam nozzle body, the upper end of the heat-insulating sleeve being connected to a steam inlet pipe, and the lower end of the heat-insulating sleeve being connected to a steam outlet pipe.

[0007] Furthermore, a first hot air pipe is provided through the feed plate, the inner end of the first hot air pipe is located in the cylinder, and a rotating nozzle is provided at the inner end of the first hot air pipe, and the outlet of the rotating nozzle is close to the inside of the feed plate.

[0008] Furthermore, the inner wall of the cylinder is uniformly distributed with material strips along its circumferential direction, the material strips are fixedly connected to the cylinder, and the direction of the material strips is consistent with the axial direction of the cylinder.

[0009] Furthermore, a closed purge box is fixedly provided inside the feed plate, the purge box is close to the material stripping strip, the purge box and the material stripping strip are clearance-matched, the side of the purge box close to the material stripping strip is an arc surface, the arc surface is coaxial with the cylinder, the center angle of the arc surface is greater than the angle between two adjacent material strips, the purge box is provided with a spray hole on the arc surface, and a second hot air pipe connected to the purge box is provided through the feed plate.

[0010] Furthermore, an arc-shaped baffle is fixedly provided inside the feed plate, the baffle is arranged along the axial direction of the cylinder, the baffle is coaxial with the cylinder, the baffle and the material strip are gap-fitted, and the baffle is fixedly connected to the purge box.

[0011] Furthermore, the purge box is located in the middle of the cylinder, and the baffles are two fixedly arranged on both sides of the purge box.

[0012] Furthermore, the purge box is at the same height as the center line of the cylinder, and the top surface of the purge box is an inclined surface.

[0013] Furthermore, the tangential direction of rotation of the cylinder close to the purge box is from top to bottom.

[0014] The positive effects of the present invention are:

[0015] 1. The present invention installs an insulation sleeve outside the steam nozzle of the humidifying drum and passes high-temperature steam to heat and insulate the steam flowing through the steam nozzle, so that no condensed water is generated in the steam nozzle, thereby improving the quality of the steam sprayed into the cylinder of the humidifying drum, reducing the probability of water-soaked leaves, and ensuring the quality of cigarettes.

[0016] 2. A first hot air pipe is provided on the feed plate of the humidifying drum, and a rotating nozzle is connected to the first hot air pipe. Hot air is ejected through the rotating nozzle to form an air curtain inside the feed plate, so that the material-steam mixture and tobacco leaves and tobacco dust are blown away by the hot air to avoid adhesion on the feed plate, thereby further avoiding the generation of water-stained leaves.

[0017] 3. A material stripping strip is provided inside the cylinder, and a purge box and a baffle are also provided inside the cylinder. The purge box is connected to a second hot air pipe. An air duct is formed between two adjacent material stripping strips, baffles, purge boxes and the inner wall of the cylinder. When the hot air enters the purge box through the second hot air pipe, it is sprayed from the nozzle on the purge box to the inner wall of the cylinder 6 to purge the inner wall of the cylinder. Then most of the hot air is blown out from both ends of the air duct along the air duct to prevent condensation on the inner wall of the cylinder.

[0018] 4. The purge box is set in the middle of the cylinder, which can make the hot air flow at high speed in the air duct without excessive consumption of hot air, thus ensuring the purge effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of Example 1;

[0020] Figure 2 It is a structural diagram of the steam nozzle;

[0021] Figure 3 It is a structural diagram of the position of the feed plate in Example 2;

[0022] Figure 4 is a schematic structural diagram of Example 3;

[0023] Figure 5 yes Figure 4 Cross-sectional view of the middle BB area;

[0024] Figure 6 yes Figure 4 Cross-sectional view of the middle AA part;

[0025] Figure 7 yes Figure 5 Working diagram after the middle drum rotates 22.5 degrees;

[0026] Figure 8 It is a structural diagram of a humidifying drum in the prior art;

[0027] In the picture:

[0028] 1. Steam nozzle; 2. Vibrating conveyor; 3. Feed plate; 4. Feeding nozzle; 5. Material stripping bar; 6. Cylinder; 7. Steam outlet pipe; 8. Insulation sleeve; 9. Steam inlet pipe; 10. Purge box; 11. Spray hole; 12. Baffle; 13. Second hot air pipe; 14. Connecting plate; 15. Air amplifier; 16. First hot air pipe; 17. Rotating nozzle; 18. Insulated steam chamber. DETAILED DESCRIPTION

[0029] like Figure 8 As shown, the conventional humidifying drum comprises a fixed, disc-shaped feed plate 3, which is provided with a cylindrical body 6 that can rotate along its horizontal axis. A vibrating feeder 2, a steam nozzle 1, and a feeding nozzle 4 are provided through the feed plate 3, the right end of which extends into the cylindrical body 6. The feed plate 3 is located at the left end of the cylindrical body 6. The steam nozzle 1 is positioned below the feed plate 3, with its right end higher than its left end. The feeding nozzle 1 is positioned above the feed plate 3, with its right end lower than its left end. An atomizing nozzle is provided at the right end of the feeding nozzle 4.

[0030] Example 1

[0031] like Figure 1 and Figure 2 As shown, a humidifying drum that can reduce waterlogging of tobacco leaves during processing has the following improvements on the basis of the existing humidifying drum:

[0032] The portion of the steam nozzle 1 located outside the barrel 6 is covered with an insulation sleeve 8 fixedly connected thereto. The insulation sleeve 8 is coaxial with the steam nozzle 1, so the insulation sleeve 8 is tilted in the same direction as the steam nozzle 1 and is also tilted from the lower left to the upper right. Between the insulation sleeve 8 and the steam nozzle 1 is a closed insulation steam chamber 18, which is wrapped around the outside of the steam nozzle 1. The bottom of the right end of the insulation sleeve 8 is connected to a steam inlet pipe 9, and the bottom of the left end of the insulation sleeve 8 is connected to a steam outlet pipe 7. The steam inlet pipe 9 is connected to a high-temperature steam (greater than 180°C) pipeline, and the high-temperature steam pressure is greater than 1MPa. The steam outlet pipe 7 is used to discharge the steam and condensed water in the insulation steam chamber 18, allowing the high-temperature steam to flow within the insulation sleeve 8 to heat and insulate the steam inlet pipe 9.

[0033] During production, the control valve on the steam nozzle 1 is opened, and the treated 0.3 MPa steam enters the cylinder 6 through the steam nozzle 1 to heat and humidify the material entering the cylinder 6.

[0034] During the injection process, the small water droplets contained in the injected steam are heated to a temperature close to 180°C because the steam nozzle 1 is surrounded by the heat-insulating steam chamber 18. The temperature of the heat-insulating steam chamber 18 is higher than 180°C, which is much higher than the steam temperature of 133°C delivered by the steam nozzle 8. As a result, the steam flowing through the steam nozzle 8 does not produce condensed water. At the same time, the small water droplets and condensed water contained in the steam in the steam nozzle 8 are re-vaporized, thereby improving the quality of the steam injected into the cylinder 6. The high-quality steam enters the cylinder 6, heats and humidifies the material in the cylinder 6, reduces the probability of water-soaked leaves, and ensures the quality of the cigarettes.

[0035] In addition, since the right end of the steam nozzle 1 is high, even if there is condensed water in the steam nozzle 1, it will not enter the interior of the cylinder 6.

[0036] Example 2

[0037] like Figure 3 As shown, the difference between this embodiment and embodiment 1 is that:

[0038] A first hot air pipe 16 is provided through the feed plate 3, and the right end of the first hot air pipe 16 is located in the cylinder 6. A rotating nozzle 17 is provided at the right end of the first hot air pipe 16. The plane where the outlet of the rotating nozzle 17 is located is parallel to the feed plate 3, and the plane is close to the right side of the feed plate 3, with a distance of 10 mm.

[0039] The right end of the first nozzle 16 and the right end of the steam nozzle 1 are both located on the right side of the plane. The first nozzles 16 are two respectively arranged next to the steam nozzle 1 and the feeding nozzle 4. The rotating nozzles 17 on the two first nozzles 16 are respectively close to the right end of the first nozzle and the right end of the steam nozzle 1.

[0040] Each first hot air pipe 16 is provided with an air amplifier 15 .

[0041] During the production process, the liquid feed is atomized by steam and then sprayed from the atomizing nozzle to the material in the barrel 6 through the feeding nozzle 4. However, a portion of the liquid feed will adhere to the right side of the feed plate 3, causing some tobacco leaves and tobacco dust to adhere to the right side of the feed plate 3 during processing, which can easily lead to water-stained tobacco leaves.

[0042] Compressed air enters from the bypass pipe of the air amplifier 4, driving 70°C hot air to enter from the left end of the first hot air pipe 16. Through the action of the air amplifier, the hot air flow rate is increased and then ejected through the rotating nozzle 17, forming a wind curtain on the right side of the feed plate 3, so that the material-steam mixture and tobacco leaves and tobacco dust are blown away by the hot air, avoiding adhesion to the right side of the feed plate 3, thereby further avoiding the formation of water-stained leaves.

[0043] Example 3

[0044] like Figures 4 to 6 As shown, the difference between this embodiment and embodiment 1 is that:

[0045] Eight rectangular stripping strips 5 are evenly distributed on the inner wall of the cylinder 6 along its circumferential direction. The stripping strips 5 are all welded to the cylinder 6 , and the axial direction of the stripping strips 5 is consistent with that of the cylinder 6 .

[0046] A closed purge box 10 is fixedly installed inside the feed plate 3. The purge box 10 is close to the material stripping strip 5. The purge box 10 and the material stripping strip 5 are clearance-matched, with the clearance size being 5mm to 10mm. The side of the purge box 10 close to the material stripping strip 5 is an arc surface, which is coaxial with the cylinder 6. The central angle of the arc surface is 50 degrees, which is greater than the 45-degree angle between two adjacent material strips 5. The purge box 10 has spray holes 11 evenly distributed on this arc surface. A second hot air pipe 13 connected to the purge box 10 is provided through the feed plate 3.

[0047] A circular arc-shaped baffle 12 is provided inside the feed plate 3, and a connecting plate 14 is welded between the baffle 12 and the feed plate 3. The baffle 12 is arranged along the axial direction of the cylinder 6, and the baffle 12 is coaxial with the cylinder 6. The gap between the baffle 12 and the material strip 5 is 5 mm to 10 mm, and the baffle 12 is fixedly connected to the purge box 10.

[0048] The purge box 10 is located in the middle of the cylinder 6 , and the baffles 12 are fixedly arranged on both sides of the purge box 10 , respectively. The left baffle 12 is connected to the connecting plate 14 .

[0049] The middle of the purge box 10 is at the same height as the center line of the cylinder 6, and the top surface of the purge box 10 is an inclined surface. Figure 5 and Figure 6 In the embodiment, the cylinder 6 rotates in a clockwise direction.

[0050] When the cylinder 6 rotates clockwise, the material at the bottom of the cylinder 6 is turned clockwise under the drive of the material strip 5, and the maximum height reached by the material will not exceed the highest point of the cylinder 6. Therefore, when passing through the baffle 12 and the purge box 10, there is no more material on the material strip 5.

[0051] Since there is steam in the cylinder 6, some of the steam will condense on the inner wall of the cylinder 6, which will cause some tobacco leaves and tobacco dust to adhere to the inner wall of the cylinder 6 during processing, thus easily forming water-stained tobacco leaves. Figure 7 In the position shown, an air duct is formed between two adjacent material strips 5, the baffle 12, the purge box 10 and the cylinder 6. When the hot air enters the purge box 10 through the second hot air pipe 13, it is sprayed from the nozzle 11 to the inner wall of the cylinder 6 to purge the inner wall of the cylinder 6. Then, most of the hot air is blown out from both ends of the air duct along the air duct to prevent condensation on the inner wall of the cylinder 6.

[0052] In actual production, the baffle 12 and the side of the purge box 10 near the stripper bar 5 can be pressed from the same sheet material. The box body is then attached to the center of the sheet material to form the purge box 10. The top of the purge box 10 is inclined to prevent tobacco leaves from accumulating on the purge box 10. The purge box 10 is located in the center of the barrel 6, ensuring high-speed flow of hot air within the air duct without excessive hot air consumption, ensuring a purge effect.

[0053] The description of the embodiments described above is relatively detailed and specific, expressing the preferred embodiments of the present invention. It is only used to illustrate the technical ideas and features of the present invention. Its purpose is to enable technical personnel in this field to understand the content of the present invention and implement it accordingly, but it is not limited to the present invention. The patent scope of the present invention cannot be limited by this embodiment alone. That is, any equivalent changes or modifications made to the spirit disclosed by the present invention, for researchers or technical personnel in this field, without departing from the structure of the present invention, local improvements within the system and changes and transformations between subsystems, etc., are still within the patent scope of the present invention. At present, the technical solution of this application has been pilot-tested, that is, a small-scale experiment of the product before large-scale mass production; after the pilot test was completed, a user usage survey was carried out on a small scale, and the survey results showed that user satisfaction was high; now preparations have been made for the formal production of the product for industrialization, including intellectual property risk warning surveys.

Claims

1. A humidifying drum capable of reducing waterlogging of tobacco leaves during tobacco processing, comprising a fixed feed plate (3), a cylinder (6) rotatable along a horizontal axis thereof, a vibrating conveyor (2) extending into the cylinder (6), a steam nozzle (1) and a feeding nozzle (4) passing through the feed plate (3), wherein: The portion of the steam nozzle (1) located outside the barrel (6) is covered with an insulation sleeve (8) fixedly connected thereto, the insulation sleeve (8) being arranged at an angle, a closed insulation steam chamber (18) being provided between the insulation sleeve (8) and the steam nozzle (1), the insulation steam chamber (18) being wrapped around the outside of the steam nozzle (1), the upper end of the insulation sleeve (8) being connected to a steam inlet pipe (9), and the lower end of the insulation sleeve (8) being connected to a steam outlet pipe (7); The inner wall of the cylinder (6) is uniformly provided with stripping strips (5) along its circumferential direction, the stripping strips (5) are fixedly connected to the cylinder (6), and the stripping strips (5) are consistent with the axial direction of the cylinder (6); A closed purge box (10) is fixedly provided inside the feed plate (3), the purge box (10) is close to the material strip (5), the purge box (10) and the material strip (5) are clearance-matched, the side of the purge box (10) close to the material strip (5) is an arc surface, the arc surface is coaxial with the cylinder (6), the center angle of the arc surface is greater than the angle between two adjacent material strips (5), the purge box (10) is provided with a spray hole (11) on the arc surface, and a second hot air pipe (13) connected to the purge box (10) is provided through the feed plate (3); A circular arc-shaped baffle (12) is fixedly provided inside the feed plate (3), the baffle (12) is arranged along the axial direction of the cylinder (6), the baffle (12) and the cylinder (6) are coaxial, the baffle (12) and the material strip (5) are clearance-fitted, and the baffle (12) is fixedly connected to the purge box (10); The purge box (10) is located in the middle of the cylinder (6), and the baffles (12) are two fixedly arranged on both sides of the purge box (10); The cylinder (6) rotates, and when the purge box (10) is located between two adjacent material strips (5), an air duct is formed between the two adjacent material strips (5), the baffle (12), the purge box (10) and the cylinder (6). After the hot air enters the purge box (10) through the second hot air pipe (13), it is sprayed from the spray hole (11) toward the inner wall of the cylinder (6), purges the inner wall of the cylinder (6), and then most of the hot air is blown out from both ends of the air duct along the air duct.

2. A humidifying drum for reducing waterlogging of tobacco leaves during processing according to claim 1, characterized in that: A first hot air pipe (16) is provided through the feed plate (3), the inner end of the first hot air pipe (16) is located in the cylinder (6), and a rotating nozzle (17) is provided at the inner end of the first hot air pipe (16), and the outlet of the rotating nozzle (17) is close to the inside of the feed plate (3).

3. The humidifying drum for reducing waterlogging of tobacco leaves during processing according to claim 1, characterized in that: The purge box (10) is at the same height as the center line of the cylinder (6), and the top surface of the purge box (10) is an inclined surface.

4. A humidifying drum for reducing waterlogging of tobacco leaves during processing according to claim 3, characterized in that: The tangential direction of rotation of the barrel (6) close to the purge box (10) is from top to bottom.

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