Pneumatic drying equipment and tobacco production system

Abstract

The invention provides pneumatic drying equipment and a tobacco production system. The airflow drying equipment comprises a roller which is rotatably arranged around the central axis of the roller and provided with an opening, the opening is formed in the first end of the roller and used for allowing materials to flow out of the roller, and the roller can swing up and down and swing downwards when the materials flow out so that the opening can face downwards; and the hot air applying mechanism communicates with the interior of the roller so as to introduce hot air into the roller and dry the materials in the roller. In this way, the drying effect can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of airflow drying, and in particular to an airflow drying device and a tobacco production system. Background Art

[0002] Airflow drying equipment uses airflow to suspend and heat the material, and quickly vaporizes the water in the material through convection heat transfer to achieve material drying. Due to its high efficiency, continuity, and easy control, airflow drying equipment is widely used in many industrial fields.

[0003] In traditional pneumatic drying equipment, the drum usually feeds materials at one end and discharges materials at the other end, and the drum is tilted downward in the discharge direction, so that the material reaches the discharge port as the drum rotates and is discharged. In this case, it is difficult to effectively adjust the heating time, which affects the drying effect. Summary of the invention

[0004] A technical problem to be solved by the present application is to improve the drying effect of airflow drying equipment.

[0005] In order to solve the above technical problems, the present application provides an air flow drying device, which comprises:

[0006] A drum is rotatably arranged around its central axis and has an opening, the opening is arranged at a first end of the drum and is used for allowing materials to flow out of the drum, the drum is arranged to swing up and down, and when the materials flow out, it swings downward so that the opening faces downward; and

[0007] The hot air applying mechanism is communicated with the interior of the drum so as to introduce hot air into the drum to dry the material in the drum.

[0008] In some embodiments, the opening is also used to allow material to enter the drum; and / or the drum remains horizontal during the material drying process from feeding to discharging; and / or the flow area of ​​the part of the drum adjacent to the opening gradually decreases along the direction in which the material flows out of the drum.

[0009] In some embodiments, the drum remains horizontal or swings upward with the opening facing upward when the material enters.

[0010] In some embodiments, the airflow drying device further includes a swing driving mechanism, which drives the drum to swing up and down; and / or, the airflow drying device further includes a limiter, which limits the axial displacement of the drum.

[0011] In some embodiments, the air flow drying device includes a support member, and the drum is rotatably arranged on the support member around its own central axis. The support member can be swung up and down, and the swing drive mechanism drives the drum to swing up and down by driving the support member to swing up and down; and / or, the swing drive mechanism includes a linear motor.

[0012] In some embodiments, the hot air applying mechanism includes a hot air supply mechanism and an air outlet shaft. The hot air supply mechanism is connected to the air outlet shaft to introduce hot air into the air outlet shaft. The air outlet shaft extends into the drum. An air outlet hole is provided on the side wall of the air outlet shaft so that the hot air introduced into the air outlet shaft can flow into the drum through the air outlet hole.

[0013] In some embodiments, the air outlet shaft is configured as at least one of the following:

[0014] The air outlet shaft is coaxially arranged with the drum;

[0015] The air outlet shaft is rotatably arranged;

[0016] A plurality of air outlet holes are arranged on the side wall of the air outlet shaft, and the plurality of air outlet holes are arranged at intervals along the axial direction and / or circumferential direction of the air outlet shaft;

[0017] One end of the air outlet shaft close to the opening is closed;

[0018] One end of the air outlet shaft away from the opening is communicated with the hot air supply mechanism.

[0019] In some embodiments, the air outlet shaft rotates synchronously with the drum; and / or, the airflow drying device includes a rotary joint, and the hot air supply mechanism is connected to the rotatably arranged air outlet shaft through the rotary joint.

[0020] In some embodiments, the hot air supply mechanism includes a hot air pipe, a heat exchanger and a fan. The hot air pipe connects the heat exchanger and the air outlet shaft. The heat exchanger is connected to the fan so that the gas driven by the fan flows through the heat exchanger, is heated by the working fluid in the heat exchanger, and then flows to the air outlet shaft through the hot air pipe.

[0021] In some embodiments, the fan has a fresh air inlet to drive fresh air to flow toward the heat exchanger; and / or, the hot air supply mechanism also includes a return air duct, which is connected to the fan and communicated with the opening so that the gas flowing out of the opening flows toward the heat exchanger under the drive of the fan.

[0022] In addition, the present application also provides a tobacco production system, which includes the airflow drying device of any embodiment.

[0023] In some embodiments, the airflow drying device dries the filter rod particle functional material.

[0024] By constructing the drum to be able to swing up and down, and to swing downward when the material flows out until the opening for discharging the material faces downward, the heating time can be flexibly adjusted, thereby effectively improving the drying effect.

[0025] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 This is a front view of the air flow drying equipment in the embodiment of the present application.

[0028] Figure 2 It is a side view of the air flow drying equipment in the embodiment of the present application. Description of reference numerals:

[0029] 10. Airflow drying equipment;

[0030] 1. Roller; 11. First end; 12. Second end; 13. Opening; 14. Copy board; 15. Guide rail;

[0031] 2. Discharge cover;

[0032] 3. Hot air applying mechanism; 31. Hot air pipe; 32. Heat exchanger; 33. Fan; 34. Return air pipe; 35. Hot air supply mechanism; 36. Air outlet shaft; 37. Air outlet hole; 38. Connecting rod; 39. Rotary joint;

[0033] 4. Tide discharge mechanism; 41. Tide discharge cover; 42. Tide discharge pipe;

[0034] 5. Support device; 51. Support member; 52. Support wheel; 53. Limiting member; 54. Bearing seat; 55. Rotating shaft; 56. Bracket;

[0035] 6. Rotation drive mechanism; 61. Rotation drive motor;

[0036] 7. Swing drive mechanism; 71. Linear motor. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without carrying out creative work are within the scope of protection of this application.

[0038] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0039] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0040] In the description of the present application, it should be understood that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present application.

[0041] In the present application, unless otherwise specified, “plurality” means at least two, that is, including cases of two and at least three.

[0042] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0043] When the drum of the pneumatic drying equipment feeds from one end and discharges from the other end, and the drum as a whole is tilted downward in the discharge direction, after the material enters the drum, it will flow to the discharge port as the drum rotates and flow out from the discharge port. In the corresponding process, the material will reach the discharge port relatively quickly, resulting in a shorter stay time of the material in the drum, a shorter time heated by hot air, and a poorer drying effect.

[0044] In the related art, the heating time of the material is usually adjusted by adjusting the temperature of the drum, adjusting the speed of the drum, and changing the length of the drum, but the effects of these methods are limited. For example, when the method of adjusting the temperature of the drum is adopted, the original properties of the material may be destroyed due to the arbitrary change of the temperature. Therefore, the adjustable temperature range is limited, and it is difficult to effectively adjust the heating time of the material and it is difficult to effectively improve the drying effect. For another example, when the method of adjusting the speed of the drum is adopted, since the frequency of the rotating drive mechanism that drives the rolling rotation has an adjustment range, and the speed affects the throwing effect of the material, if the speed is too low, the material cannot be thrown up in the drum, affecting the heating uniformity, and if the speed is too high, it will shorten the heating time. Therefore, it is also difficult to effectively adjust the heating time of the material and it is difficult to effectively improve the drying effect. For another example, when the method of changing the length of the drum is adopted, due to the influence of factors such as manufacturing cost, site size and installation difficulty, the length of the drum cannot be too long, and due to structural limitations, the length of the drum is difficult to adjust on site, but after manufacturing, it cannot be adjusted again. Therefore, it is also difficult to effectively adjust the heating time of the material and it is difficult to effectively improve the drying effect.

[0045] It can be seen that how to effectively adjust the material heating time and thus improve the drying effect of the airflow drying equipment is a difficult problem.

[0046] In view of the above situation, the present application improves the structure of the airflow drying equipment.

[0047] Figure 1-Figure 2 The structure of the airflow drying device in the present application is shown exemplarily.

[0048] See also Figure 1-Figure 2 In the present application, the airflow drying device 10 includes a drum 1 and a hot air applying mechanism 3. The hot air applying mechanism 3 is connected to the inside of the drum 1 to pass hot air into the drum 1 to dry the material in the drum 1. The drum 1 is rotatably arranged around its own central axis and has an opening 13. The opening 13 is arranged at the first end 11 of the drum 1 and is used for the material to flow out of the drum 1. The drum 1 can be swung up and down, and swings downward when the material flows out, so that the opening 13 faces downward.

[0049] In the above scheme, the drum 1 no longer adopts the method of feeding at one end and discharging at the other end, and the drum as a whole is tilted downward along the discharging direction. Instead, the drum 1 is set to be able to swing up and down, and swing downward when the material flows out, so that the opening 13 of the drum 1 for discharging faces downward. In this way, the material will not flow out directly from the other end of the drum after feeding, but will only flow out from the drum 1 when the drum 1 swings downward to the opening 13 facing downward. Therefore, the discharging time can be controlled by controlling whether the drum 1 swings downward to the opening 13 facing downward, and then the residence time of the material in the drum 1 can be controlled, that is, the heating time of the material can be controlled, and the heating time can be flexibly adjusted to effectively meet the drying process requirements. In this way, the drying effect can be effectively improved.

[0050] Compared with the method of adjusting the heating time by adjusting the drum temperature, the drum speed and the drum length, adjusting the heating time by controlling whether the drum 1 swings downward to the opening 13 is more simple and convenient, and is not restricted by the drum temperature, the drum speed and the drum length. Therefore, the heating time can be adjusted more effectively, thereby improving the drying effect more effectively. Of course, while controlling whether the drum 1 swings downward to the opening 13 to the downward to adjust the heating time, the drum temperature, the drum speed and the drum length can also be adjusted to further improve the drying effect.

[0051] It can be seen that by constructing the drum 1 to be able to swing up and down, and swinging downward until the opening 13 for discharging the material faces downward when the material flows out, the heating time can be easily and flexibly adjusted, thereby effectively improving the drying effect.

[0052] Furthermore, when the material flows out, the drum 1 swings downward until the opening 13 for discharging faces downward, so that the material can quickly flow out of the drum 1 under the action of gravity, and the discharging is convenient. Therefore, it is also beneficial to increase the discharging speed, thereby effectively improving the working efficiency of the airflow drying equipment 10 and accelerating the production rhythm.

[0053] It can be seen that by constructing the drum 1 to be able to swing up and down, and to swing downward until the opening 13 for discharging the material is facing downward when the material flows out, not only can the flexible adjustment of the heating time be conveniently achieved, thereby effectively improving the drying effect of the airflow drying equipment 10, but also rapid discharging can be achieved, thereby effectively improving the working efficiency of the airflow drying equipment 10 and accelerating the production rhythm.

[0054] It can be understood that the drum 1 swings downward when the material flows out to the opening 13 for discharging the material facing downward, which means that when the material is not discharged, the drum 1 does not swing downward to the opening 13 facing downward, but remains horizontal or tilted upward to the opening 13 facing upward. Figure 1In some embodiments, the drum 1 is kept horizontal during the material drying process from feeding to discharging. In this way, compared with the case where the opening 13 of the drum 1 is facing upward during the drying process, it is convenient to control the drum 1 to swing downward to discharge the material when discharging is required, and it can also prevent the material from accumulating at the second end 12 of the drum 1 opposite to the first end 11 during the airflow drying process, and facilitate the material to be fully thrown in the drum 1 as the drum 1 rotates during the airflow drying process, and contact with the hot air, thereby achieving a better drying effect.

[0055] In the above embodiments, the drum 1 can be fed from the second end 12 of the drum 1. At this time, the drum 1 still adopts the method of feeding from one end and discharging from the other end. Alternatively, the drum 1 can also be fed from the opening 13. At this time, the opening 13 is not only used for discharging but also for feeding. The material flows out of the drum 1 through the opening 13 and enters the drum 1 through the opening 13. The drum 1 no longer adopts the method of feeding from one end and discharging from the other end, but adopts the method of feeding and discharging from the same end. Among them, compared with the situation that the opening 13 is only used for discharging but not for feeding, and the drum 1 feeds from one end and discharging from the other end, the opening 13 is used for both discharging and feeding. When the drum 1 is fed and discharging from the same end, the material enters and exits through the same opening 13, which is conducive to extending the flow path of the material and increasing the heating time of the material. Therefore, it is more conducive to improving the drying effect. Moreover, when the material enters and exits through the same opening 13, the feeding and discharging are naturally not carried out at the same time, that is, no material is discharged during feeding, and no material is fed during discharging. In this way, there is no need to consider the discharging during the feeding process, and there is no need to consider the feeding process. It is more convenient to adjust the heating time by controlling the drum 1 to swing downward when the material flows out until the opening 13 faces downward. Moreover, even if the drum 1 is swung upward to the feed port facing upward during feeding, the material will not flow out accidentally. Therefore, it is also more convenient to feed.

[0056] In the case where the opening 13 is used for both discharging and feeding, the drum 1 can remain horizontal when the material enters, or it can also swing upward so that the opening 13 is facing upward. The drum 1 remains horizontal or swings upward so that the opening 13 is facing upward when the material enters. Both methods can conveniently realize the feeding process. However, compared with the case where the drum 1 remains horizontal when the material enters, when the drum 1 swings upward so that the opening 13 is facing upward when the material enters, the material added through the opening 13 can quickly enter the drum 1 under the action of gravity. Therefore, it is more convenient to feed, which can improve the feeding efficiency and speed up the production rhythm.

[0057] In the above embodiments, the flow area of ​​the portion of the drum 1 adjacent to the opening 13 can be gradually reduced along the direction in which the material flows out of the drum 1. In this way, the portion of the drum 1 adjacent to the opening 13 gradually shrinks along the discharging direction, which can converge the material during the discharging process, making it more convenient for the material to be discharged quickly and realizing an efficient discharging process. Moreover, when the opening 13 is not only used for discharging but also for feeding, the portion of the drum 1 adjacent to the opening 13 gradually shrinks along the discharging direction, which means that the portion of the drum 1 adjacent to the opening 13 gradually expands along the feeding direction, that is, the flow area of ​​the portion of the drum 1 adjacent to the opening 13 gradually increases along the direction in which the material flows into the drum 1, so that the material can be prevented from being blocked at the opening 13 during the feeding process, and therefore, it is conducive to realizing a smoother and more efficient feeding process. It can be seen that the flow area of ​​the portion of the drum 1 adjacent to the opening 13 gradually decreases along the direction in which the material flows out of the drum 1, which is not only convenient for discharging, but also convenient for feeding when the opening 13 is used for feeding at the same time, all of which are conducive to improving the working efficiency of the airflow drying equipment 10 and speeding up the production rhythm.

[0058] As a further improvement to the above embodiments, see Figure 1 and Figure 2 In some embodiments, the airflow drying device 10 further includes a swing drive mechanism 7, which drives the drum 1 to swing up and down. In this way, the drum 1 can automatically swing up and down under the drive of the swing drive mechanism 7, which is more time-saving and labor-saving, more efficient, and more precisely controlled than manually swinging the drum 1 up and down, which is conducive to more accurately and reliably adjusting the heating time and improving the drying effect.

[0059] The swing drive mechanism 7 can directly or indirectly drive the drum 1 to swing. Figure 1 In some embodiments, the airflow drying device 10 includes a support member 51, and the drum 1 is rotatably arranged on the support member 51 around its own central axis. The support member 51 can be set to swing up and down, and the swing driving mechanism 7 drives the drum 1 to swing up and down by driving the support member 51 to swing up and down. At this time, the swing driving mechanism 7 does not directly drive the drum 1, but drives the drum 1 to swing up and down by driving the support member 51.

[0060] In addition, the swing drive mechanism 7 can adopt various structural forms. For example, see Figure 1 In some embodiments, the swing drive mechanism 7 includes a linear motor 71. In this way, the linear motor 71 only needs to be extended and retracted up and down to drive the drum 1 to swing up and down, which is simple and reliable.

[0061] The airflow drying device 10 in the above embodiments may further include a stopper 53, which limits the axial displacement of the drum 1. In this way, the drum 1 can be prevented from axially moving around its own central axis and in the process of swinging up and down, thereby making the whole structure more stable and reliable.

[0062] As an example of the hot air applying mechanism 3 in the above-mentioned embodiments, see Figure 1 The hot air applying mechanism 3 includes a hot air supply mechanism 35 and an air outlet shaft 36. The hot air supply mechanism 35 is connected to the air outlet shaft 36 to pass hot air into the air outlet shaft 36. The air outlet shaft 36 extends into the drum 1. An air outlet hole 37 is provided on the side wall of the air outlet shaft 36 so that the hot air passed into the air outlet shaft 36 flows into the drum 1 through the air outlet hole 37. In this way, the hot air applying mechanism 3 can prepare hot air through the hot air supply mechanism 35 and send it into the drum 1 through the air outlet shaft 36 to perform airflow drying on the material, which is simple and convenient.

[0063] There may be multiple air outlet holes 37 on the side wall of the air outlet shaft 36, and these multiple air outlet holes 37 may be arranged at intervals along the axial direction and / or circumferential direction of the air outlet shaft 36 to more evenly supply air to the drum 1, so that the hot air and the material can be more evenly contacted and heat exchanged to achieve a better airflow drying effect.

[0064] In addition, the air outlet shaft 36 can be coaxial or non-coaxial with the drum 1. When the air outlet shaft 36 is coaxial with the drum 1, the hot air can be more evenly distributed in the inner space of the drum 1 through the air outlet shaft 36, and can more fully contact and exchange heat with the material to dry the material, thus being more conducive to improving the drying effect.

[0065] See also Figure 1 In some embodiments, one end of the air outlet shaft 36 near the opening 13 is closed. In this way, no air is discharged from the end of the air outlet shaft 36 near the opening 13, and the hot air mainly flows into the drum 1 from the air outlet holes 37 on the side wall of the air outlet shaft 36. Since the hot air can be prevented from directly flowing out of the opening 13 to the outside of the drum 1, it is more conducive to prolonging the contact time between the hot air and the material and improving the drying effect.

[0066] Also, see Figure 1 In some embodiments, the end of the air outlet shaft 36 away from the opening 13 is connected to the hot air supply mechanism 35. In this case, the hot air supply mechanism 35 can be arranged at the second end 12 of the drum 1 opposite to the first end 11, which can not only make full use of the space, making the whole machine structure more compact and smaller, but also make the air flow into the direction of the air outlet shaft 36, which is opposite to the feeding direction, when the opening 13 is used for feeding and discharging, to form the effect of material and hot air convection, improve the contact between the material and the hot air, and improve the drying effect.

[0067] In the above-mentioned embodiments, the air outlet shaft 36 can be rotatably arranged, which is also conducive to evenly distributing the hot air inside the drum 1 and improving the drying effect.

[0068] When the air outlet shaft 36 is rotatably arranged, the air outlet shaft 36 can rotate synchronously with the drum 1 to further enhance the contact sufficiency and uniformity between the hot air and the material, thereby improving the drying effect.

[0069] In addition, when the air outlet shaft 36 is rotatably arranged, see Figure 1 In some embodiments, the airflow drying device 10 includes a rotary joint 39, and the hot air supply mechanism 35 is connected to the rotatable air outlet shaft 36 through the rotary joint 39. Under the action of the rotary joint 39, the hot air supply mechanism 35 can rotate relative to the air outlet shaft 36, so that when the air outlet shaft 36 rotates, the hot air supply mechanism 35 does not need to rotate, so that it is more convenient to set the hot air supply mechanism 35, which is conducive to simplifying the structure of the whole machine.

[0070] As an example of the hot air supply mechanism 35 in the above-mentioned embodiments, see Figure 1 The hot air supply mechanism 35 includes a hot air pipe 31, a heat exchanger 32 and a fan 33. The hot air pipe 31 connects the heat exchanger 32 and the air outlet shaft 36. The heat exchanger 32 is connected to the fan 33 so that the gas driven by the fan 33 flows through the heat exchanger 32, is heated by the working medium (such as steam) in the heat exchanger 32, and then flows to the air outlet shaft 36 through the hot air pipe 31. Based on this, the air flows through the heat exchanger 32 driven by the fan 33, exchanges heat with the working medium in the heat exchanger 32, absorbs heat from the working medium, and increases in temperature to become hot air. After that, the hot air flows into the air outlet shaft 36 through the hot air pipe 31 driven by the fan 33, and flows to the drum 1 through the air outlet shaft 36, thereby realizing the preparation of hot air and the delivery of hot air to the drum 1, which is simple and convenient.

[0071] In some embodiments, the fan 33 has a fresh air outlet to drive fresh air to flow to the heat exchanger 32. In this way, fresh air from the outside can be added to the airflow drying device 10 to meet the hot air flow demand, effectively heat the material, and achieve a better drying effect.

[0072] Also, see Figure 1 In some embodiments, the hot air supply mechanism 35 includes a return air duct 34, which is connected to the fan 33 and communicates with the opening 13, so that the gas flowing out of the opening 13 flows to the heat exchanger 32 under the drive of the fan 33. In this way, the gas flowing out of the drum 1 can be recycled after being heated, reducing energy waste.

[0073] The pneumatic drying device 10 of the aforementioned embodiments can be used in various production systems to dry various materials. For example, in some embodiments, the pneumatic drying device 10 is used in a tobacco production system to perform pneumatic drying on tobacco materials. In this way, the drying effect of tobacco materials can be effectively improved to obtain tobacco products with better quality.

[0074] When the airflow drying device 10 is used in a tobacco production system to perform airflow drying on tobacco materials, the airflow drying device 10 can be particularly used to dry filter rod particle functional materials.

[0075] As an important component of cigarettes, the performance of filter rods directly affects the taste of cigarettes. The particle functional materials that make up the filter rods have excellent adsorption, stability and safety, and can effectively intercept and filter harmful substances in smoke, such as tar, nicotine and other harmful particles, thereby reducing tar and reducing harm. However, these particle functional materials need to go through a drying stage during the preparation process to ensure their stability and use effect.

[0076] In the related art, vacuum drying, microwave drying or adsorption material adsorption is usually used to dry the functional materials of filter rod particles. However, these drying methods have problems such as low efficiency, high energy consumption and easy damage to the properties of the functional materials of filter rod particles themselves. It is difficult to effectively meet the needs of industrial production of functional materials of filter rod particles.

[0077] When the airflow drying device 10 is used to dry the filter rod particle functional material, the airflow drying technology can be used to dry the filter rod particle functional material, giving full play to the advantages of the airflow drying technology such as large heat and mass transfer surface area, high drying efficiency and short drying time, so that the hot air and the filter rod particle functional material can fully exchange heat, and the filter rod particle functional material can be dried efficiently and with high quality, and the filter rod particle functional material can be prevented from agglomerating, burning or over-drying, so that the uniformity and consistency of the dried filter rod particle functional material are better.

[0078] Moreover, since the drum 1 of the airflow drying device 10 can swing up and down, and can swing downward until the opening 13 for discharging the material faces downward when the material flows out, it is convenient to realize flexible adjustment of the heating time. Therefore, it can effectively improve the drying effect of the filter rod particle functional material, further improve the quality stability of the filter rod particle functional material, and improve the quality of tobacco products.

[0079] Next, combine Figure 1 and Figure 2 The embodiments shown are used to further introduce the present application.

[0080] In this embodiment, the airflow drying device 10 is an airflow drying device for filter rod particle functional materials, and the material dried by the airflow drying device is the filter rod particle functional material.

[0081] like Figure 1 and Figure 2 As shown, the airflow drying device 10 of this embodiment includes a drum 1, a discharge cover 2, a hot air applying mechanism 3, a moisture removal mechanism 4, a supporting device 5, a rotating drive mechanism 6 and a swinging drive mechanism 7.

[0082] The drum 1 is used to provide a place for material drying. Figure 1 As shown, in this embodiment, the drum 1 is roughly cylindrical, with its central axis extending horizontally and intersecting with the vertical direction (that is, the up and down direction), and an annular guide rail 15 is provided at each end. The guide rail 15 cooperates with the roller 52 of the support device 5, so that the drum 1 is rotatably arranged on the support device 5 around its own central axis to drive the material to roll.

[0083] In order to realize the automatic rotation of the drum 1 around its own central axis, in this embodiment, the second end 12 of the drum 1 is drivingly connected to the rotation drive mechanism 6, so that the drum 1 can automatically rotate around its own central axis under the drive of the rotation drive mechanism 6. Specifically, in this embodiment, the rotation drive mechanism 6 includes a rotation drive motor 61 and a belt transmission mechanism (not shown), and accordingly, the second end 12 of the drum 1 is provided with a wheel groove (not shown) that cooperates with the belt, so that the rotation drive motor 61 rotates, and the drum 1 can be driven to rotate around its own central axis through the belt transmission mechanism.

[0084] In this embodiment, the first end 11 and the second end 12 of the drum 1 are respectively the right end and the left end of the drum 1. The first end 11 is provided with an opening 13, and the second end 12 is blocked, so that the opening 13 is used as both a feed port and a discharge port, and materials enter and exit through the same opening 13.

[0085] A lifting plate 14 is provided inside the drum 1. The lifting plate 14 is tilted on the inner wall of the drum 1, that is, there is a certain angle between the lifting plate 14 and the inner wall of the drum 1, so as to throw the material up and stir the material together with the drum 1, so that the material is fully contacted with the hot air. In this embodiment, a plurality of groups of lifting plates 14 are provided inside the drum 1. The plurality of groups of lifting plates 14 are arranged at intervals along the axial direction of the drum 1, and each group of lifting plates 14 includes a plurality of lifting plates 14 evenly arranged along the circumference of the drum 1, so that the material can be thrown more evenly and fully, and a better drying effect can be achieved.

[0086] The portion of the first end 11 of the drum 1 adjacent to the opening 13 gradually expands along the feeding direction to prevent material blocking and facilitate material discharging. In addition, a discharging cover 2 is provided at the opening 13 to prevent material from escaping during discharging. A material door is provided on the surface of the discharging cover 2 away from the opening 13. After the material door is opened, materials can be added so that the materials enter the drum 1 through the opening 13 to realize the feeding process. The bottom of the discharging cover 2 is open so that when discharging, the materials flowing out of the opening 13 fall down to realize the discharging process.

[0087] A through hole (not shown) is provided at the center of the second end 12 of the drum 1 for the air outlet shaft 36 of the hot air applying mechanism 3 to pass through.

[0088] The hot air applying mechanism 3 is used to apply hot air to the inside of the drum 1 to perform airflow drying on the material in the drum 1. Figure 1 As shown, in this embodiment, the hot air applying mechanism 3 includes an air outlet shaft 36 , a connecting rod 38 , a rotating joint 39 and a hot air supply mechanism 35 .

[0089] The air outlet shaft 36 extends into the interior of the drum 1 through the through hole at the center of the second end 12 of the drum 1, and is connected to the inner wall of the drum 1 through a plurality of connecting rods 38, so that the air outlet shaft 36 is disposed inside the drum 1, coaxially arranged with the drum 1, and can rotate synchronously with the drum 1. In this embodiment, the air outlet shaft 36 is a hollow shaft, the right end face of which (i.e., the end face close to or facing the opening 13) is a sealing face, and a plurality of groups of air outlet holes 37 are provided on the portion located inside the drum 1, the plurality of groups of air outlet holes 37 are arranged at intervals along the axial direction of the air outlet shaft 36, and each group of air outlet holes 37 includes a plurality of air outlet holes 37 uniformly arranged along the circumference of the air outlet shaft 36, so as to uniformly pass the hot air into the drum 1.

[0090] The left end of the air outlet shaft 36 extends to the outside of the drum 1 and is connected to the hot air supply mechanism 35 through a rotary joint 39 .

[0091] The hot air supply mechanism 35 is used to prepare and supply hot air. Figure 1 As shown, in this embodiment, the hot air supply mechanism 35 includes a hot air pipe 31 , a heat exchanger 32 , a fan 33 and a return air pipe 34 .

[0092] One end of the hot air pipe 31 is connected to the air outlet shaft 36 via a rotary joint 39 , so that when the air outlet shaft 36 rotates, the hot air pipe 31 does not need to rotate and is in a stationary state. At the same time, the other end of the hot air pipe 31 is connected to the heat exchanger 32 .

[0093] The heat exchanger 32 connects the fan 33 and the hot air pipe 31, and has evenly arranged pipes inside. Steam used as a working medium flows inside the pipes, and gas to be heated flows outside the pipes. When the gas to be heated flows through the pipes, it can absorb heat from the steam inside the pipes, increase its temperature, and turn into hot air.

[0094] The fan 33 drives the gas flow. In this embodiment, the fan 33 has an independent fresh air inlet to replenish the fresh air from the outside to the hot air supply mechanism 35 to meet the hot air flow rate. A filter is installed at the fresh air inlet to filter the fresh air.

[0095] The return air duct 34 is used to guide the return air to the fan 33, and under the drive of the fan 33, the return air flows through the heat exchanger 32, is heated by steam, and returns to the drum 1, realizing the recycling of hot air. Figure 1 As shown, in this embodiment, one end of the return air duct 34 is connected to the fan 33 , and the other end is connected to the moisture exhaust mechanism 4 .

[0096] Depend on Figure 1 It can be seen that in this embodiment, the dehumidification mechanism 4 includes a dehumidification hood 41 and a dehumidification pipe 42. The dehumidification hood 41 is installed at the upper end of the discharge hood 2, and is used to discharge the hot air and water vapor inside the drum 1. The side of the dehumidification hood 41 is connected to the return air pipe 34 of the hot air application mechanism 3, so that the hot air flowing out of the drum 1 can flow back to the hot air application mechanism 3 and recirculate, and the upper end of the dehumidification hood 41 is connected to the dehumidification pipe 42 to discharge the moisture in the device.

[0097] The supporting device 5 is used to support the drum 1. Figure 1 and Figure 2 As shown, in this embodiment, the support device 5 includes a support member 51, a supporting wheel 52, a limiting member 53, a bearing seat 54, a rotating shaft 55 and a bracket 56. Among them, the support member 51 is a support plate, and two groups of supporting wheels 52 are installed on the upper side thereof, which are used to support the drum 1 and realize the rotation of the drum 1. The lower side thereof is arranged on the bracket 56 through the bearing seat 54 and the rotating shaft 55. The axial direction of the rotating shaft 55 is along the front-to-back direction, so that the support member 51 can be arranged on the bracket 56 to swing up and down, and can drive the drum 1 to swing up and down together. The limiting member 53 is a limiting wheel, which is used to limit the axial displacement of the drum 1 and prevent the drum 1 from moving axially during operation. In this embodiment, limiting members 53 are provided below the left and right ends of the drum 1 to more reliably limit the axial position of the drum 1.

[0098] The swing drive mechanism 7 is used to drive the drum 1 to swing up and down. Figure 1 As shown, in this embodiment, the swing drive mechanism 7 includes a linear motor 71. The linear motor 71 is vertically fixed to the right side of the bracket 56, located below the first end 11 of the drum 1, and connected to the right end of the support member 51. In this way, the linear motor 71 can be extended and retracted up and down to drive the support member 51 and the drum 1 to swing up and down around the rotating shaft 55 to adjust the inclination angle of the drum 1.

[0099] Based on the above structural setting, the pneumatic drying device 10 of this embodiment can feed and discharge materials through the same end of the drum 1, and can control whether to discharge materials by controlling whether the drum 1 swings downward, thereby flexibly controlling the heating time. The corresponding working process is roughly as follows:

[0100] During operation, the linear motor 71 extends upward, drives the drum 1 to swing upward, makes the opening 13 on the right side of the drum 1 face upward, and then adds the material to be dried into the drum 1 through the opening 13. After that, the linear motor 71 retracts, makes the drum 1 return to the horizontal position, and the drum 1 rotates, and together with the lifting plate 14 inside the drum 1, the material is thrown up. During the rotation of the drum 1, the air outlet shaft 36 of the hot air applying mechanism 3 continuously applies hot air to the surroundings inside the drum 1 to dry the thrown material. The excess hot air and water vapor inside 1 flow to the dehumidification cover 41 above the discharge cover 2 through the opening 13, and the water vapor is discharged through the dehumidification pipe 42 of the dehumidification mechanism 4. Under the action of the fan 33, the hot air passes through the return air pipe 34 of the hot air supply mechanism 35 and enters the heat exchanger 32 again, and re-enters the drum 1 after reaching the process temperature to realize the hot air circulation. After the drying is completed, the linear motor 71 retracts, drives the drum 1 to swing downward, and the opening 13 faces downward, so that the material is discharged through the opening 13 and the bottom opening of the discharge cover 2.

[0101] Furthermore, before the material is formally dried, the airflow drying device 10 may be preheated. Specifically, before feeding, the drum 1 is driven to rotate around its own central axis, and the heat exchanger 32 and the fan 33 are turned on, so that the external air enters the hot air supply mechanism 35 from the fresh air port of the fan 33, and the air is heated when passing through the heat exchanger 32, and then flows into the air outlet shaft 36, and is sprayed from the air outlet shaft 36 to the surroundings of the inside of the drum 1, so as to preheat the inside of the drum 1. In this way, it is beneficial to further improve the drying efficiency and improve the drying effect.

[0102] It can be seen that this embodiment combines the uniform heating characteristics of drum hot air drying with the rapid mass transfer and heat transfer advantages of airflow drying, which can achieve efficient, uniform and low-energy drying of filter rod particle functional materials. In addition, since the material is fed in and out through the same end of the drum 1, and the discharge is controlled by controlling whether the drum 1 swings downward, the heating time can be flexibly controlled according to actual needs, effectively improving the drying effect of the filter rod particle functional materials and enhancing the quality stability of the filter rod particle functional materials. This is of great significance for improving the quality of cigarettes, protecting consumer health, and promoting the sustainable development of the tobacco industry.

[0103] The above description is only an exemplary embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An airflow drying device (10), characterized in that: include: A drum (1) is rotatably arranged around its own central axis and has an opening (13), wherein the opening (13) is arranged at a first end (11) of the drum (1) and is used for allowing materials to flow out of the drum (1), and the drum (1) is arranged to swing up and down, and when the materials flow out, it swings downward so that the opening (13) faces downward; and The hot air applying mechanism (3) is connected to the interior of the drum (1) so as to introduce hot air into the drum (1) to dry the material in the drum (1).

2. The airflow drying device (10) according to claim 1, characterized in that: The opening (13) is also used for allowing material to enter the drum (1); and / or the drum (1) is kept horizontal during the material drying process from after material feeding to before material discharge; and / or the flow area of ​​the portion of the drum (1) adjacent to the opening (13) gradually decreases along the direction in which the material flows out of the drum (1).

3. The airflow drying device (10) according to claim 2, characterized in that: When materials enter, the drum (1) remains horizontal or swings upward so that the opening (13) faces upward.

4. The airflow drying device (10) according to claim 1, characterized in that: The airflow drying device (10) further comprises a swing drive mechanism (7), wherein the swing drive mechanism (7) drives the drum (1) to swing up and down; and / or the airflow drying device (10) further comprises a limiter (53), wherein the limiter (53) limits the axial displacement of the drum (1).

5. The airflow drying device (10) according to claim 4, characterized in that: The airflow drying device (10) comprises a support member (51), the drum (1) is rotatably arranged on the support member (51) around its own central axis, the support member (51) is arranged to swing up and down, and the swing drive mechanism (7) drives the drum (1) to swing up and down by driving the support member (51) to swing up and down; and / or the swing drive mechanism (7) comprises a linear motor (71).

6. The pneumatic drying device (10) according to any one of claims 1 to 5, characterized in that: The hot air applying mechanism (3) comprises a hot air supply mechanism (35) and an air outlet shaft (36); the hot air supply mechanism (35) is connected to the air outlet shaft (36) so as to introduce hot air into the air outlet shaft (36); the air outlet shaft (36) extends into the drum (1); an air outlet hole (37) is provided on a side wall of the air outlet shaft (36) so that the hot air introduced into the air outlet shaft (36) flows into the drum (1) via the air outlet hole (37).

7. The airflow drying device (10) according to claim 6, characterized in that: The air outlet shaft (36) is constructed as at least one of the following: The air outlet shaft (36) is coaxially arranged with the drum (1); The air outlet shaft (36) is rotatably arranged; A plurality of the air outlet holes (37) are provided on the side wall of the air outlet shaft (36), and the plurality of air outlet holes (37) are arranged at intervals along the axial direction and / or the circumferential direction of the air outlet shaft (36); One end of the air outlet shaft (36) close to the opening (13) is closed; One end of the air outlet shaft (36) away from the opening (13) is in communication with the hot air supply mechanism (35).

8. The airflow drying device (10) according to claim 7, characterized in that: The air outlet shaft (36) rotates synchronously with the drum (1); and / or the airflow drying device (10) comprises a rotary joint (39), and the hot air supply mechanism (35) is connected to the rotatably arranged air outlet shaft (36) via the rotary joint (39).

9. The airflow drying device (10) according to claim 6, characterized in that: The hot air supply mechanism (35) comprises a hot air pipe (31), a heat exchanger (32) and a fan (33); the hot air pipe (31) is connected to the heat exchanger (32) and the air outlet shaft (36); the heat exchanger (32) is connected to the fan (33) so that the gas driven by the fan (33) flows through the heat exchanger (32), is heated by the working medium in the heat exchanger (32), and then flows to the air outlet shaft (36) through the hot air pipe (31).

10. The airflow drying device (10) according to claim 9, characterized in that: The fan (33) has a fresh air inlet to drive fresh air to flow toward the heat exchanger (32); and / or the hot air supply mechanism (35) further includes a return air duct (34), wherein the return air duct (34) is connected to the fan (33) and communicates with the opening (13), so that the gas flowing out of the opening (13) flows toward the heat exchanger (32) under the drive of the fan (33).

11. A tobacco production system, characterized in that: It comprises the airflow drying device (10) as described in any one of claims 1 to 10.

12. The tobacco production system according to claim 11, characterized in that: The airflow drying device (10) dries the filter rod particle functional material.

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