Air duct adjusting device of rotary dryer

Abstract

The utility model discloses a rotary drum dryer air duct adjusting device which comprises an air duct assembly capable of changing the air direction and a rotary drum body, the air duct assembly wraps the outer side of the rotary drum body and forms an air channel with the interior of the rotary drum body to be used for achieving heat exchange in the rotary drum body, and the air duct assembly is installed on a machine frame. An air port of the air duct assembly is connected with an air blower or an exhaust fan. According to the air duct adjusting device of the rotary dryer, the air direction can be changed in the drying process of the air duct device, it is guaranteed that air and materials are in full contact in the drying process, heat exchange between blast bead wet pills and air is achieved as much as possible, and the fluidization effect and the drying efficiency are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cigarette bursting beads, in particular to an air duct adjusting device for a rotary dryer. Background Technique

[0002] The cigarette bursting beads, commonly known as capsules and flavor beads, with a diameter of 1.5 - 6.5 mm, are spherical objects made of edible glue, which contain characteristic flavor liquids prepared by flavoring agents, Chinese herbal medicine extracts and appropriate solvents. Adding bursting beads to cigarettes is a kind of original flavor compensation technology for cigarette flavoring. By adding different substances to the cigarette bursting beads, the aroma of cigarettes can be enriched, the taste of cigarettes can be improved, and the harmful components of cigarettes can be reduced. "Adding bursting beads" as a new cigarette flavoring technology has become an important technical means for constructing cigarette products with flavor shaping as the core. Therefore, in recent years, with the rapid development of bursting bead cigarettes in domestic and foreign markets, the production demand for bursting beads by tobacco enterprises has been increasing continuously.

[0003] The commonly used method for the industrialization of bursting bead preparation is the concentric film-forming method. The concentric nozzle of the dropping machine sprays the wall material solution and the core material solution at different speeds. After the wall material wraps a certain amount of the core material, it is dropped into another immiscible cooling liquid to solidify and form. After subsequent curing, cleaning, drying, screening and other processes, the finished bursting beads are finally obtained. The current drying methods mainly include natural air drying, rotary drying, etc. Since both the wall material and the core material of the bursting beads are formed from liquids, the wet pills before drying are all in a soft state. During the rotary drying process, it is not easy to control their shape and fluidization state, and it is easy to cause abnormal shapes such as ellipse, bulge, and hemisphere of the bursting beads. This reduces the product quality and production efficiency.

[0004] The wet bursting beads are fluidized and dried in the rotary drum. Through the heat exchange between air and the wet beads, the moisture of the wet beads is carried away. The air flow in the bursting bead rotary drying technology is one of the key factors for realizing the efficient drying process. The air enters the rotary drum through the air duct, and the operation state of the air duct is related to that of the rotary drum. When the rotary drum rotates at different speeds, the concentrated position of the material in the rotary drum is different, and the air direction is not convenient to adjust, which reduces the drying efficiency. In addition, the quality of the dried material contained in the rotary drum will also cause its position in the rotary drum to be different. Similarly, the air direction is not convenient to adjust, which reduces the drying efficiency. Therefore, how to realize the air direction adjustment of the rotary dryer is a technical problem that needs to be solved urgently by those skilled in the art. Content of the Utility Model

[0005] To solve the above technical problems, the utility model provides an air duct adjusting device for a rotary dryer, which can change the air direction during the drying process, ensure the full contact between air and materials during the drying process, maximize the heat exchange between the wet bursting beads and air, and improve the fluidization effect and drying efficiency.

[0006] The technical solution provided by the utility model is as follows:

[0007] A drum dryer air duct adjusting device includes an air duct assembly capable of changing the wind direction and a drum body. The air duct assembly is wrapped outside the drum body and forms an air passage with the inside of the drum body to achieve heat exchange inside the drum body. The air duct assembly is installed on a frame, and a blower or an exhaust fan is connected to the air outlet of the air duct assembly.

[0008] Preferably, the air duct assembly includes a plurality of air ducts arranged along the length direction of the drum body and annular tracks arranged at both ends of the drum body. The air ducts are slidably arranged on the annular tracks, and an arc-shaped cover is arranged inside the annular tracks. The air ducts and the arc-shaped cover form an integral cavity structure for air to exchange inside.

[0009] Preferably, the air ducts are slidably arranged on the inner side wall of the annular track and can rotate 360° along the annular track to realize the switching between the positive pressure drying mode of downward blowing and the negative pressure drying mode of upward exhaust.

[0010] Preferably, the number of the air ducts is not less than two.

[0011] Preferably, the arc-shaped cover is arranged at the inner ring formed by the annular arrangement of a plurality of air ducts.

[0012] Preferably, the drum body includes a drum cage, a collection channel, a heat exchange unit, and a control unit for controlling the normal operation of the entire drum body. The collection channel is arranged on the inner wall of the discharge end of the drum cage. There is a channel for air circulation between the heat exchange unit and the air duct assembly, and the air duct assembly is wrapped outside the drum cage.

[0013] The present utility model has the following advantages compared with the prior art:

[0014] By setting the air duct assembly of the drum dryer air duct adjusting device of the present utility model and changing the wind direction through the air duct assembly, it is ensured that the wind and the material are in full contact during the drying process, and the explosive bead wet pills and the air exchange heat as much as possible, improving the fluidization effect and drying efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0016] Figure 1 It is a schematic structural diagram of the drum dryer air duct adjusting device in the embodiment of the present utility model;

[0017] Figure 2 This is a schematic structural view of the air duct assembly in the embodiment of the present utility model.

[0018] Reference numerals:

[0019] 1. Air duct assembly; 11. Air duct; 12. Annular track; 13. Arc-shaped cover; 2. Rotating drum body; 21. Rotating cage; 22. Collection channel. Detailed implementation manners

[0020] In order to enable those skilled in the art to better understand the technical solutions in the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0021] As Figure 1 、 2 shown, the embodiment of the present utility model provides a rotating drum dryer air duct adjusting device, which includes an air duct assembly 1 capable of changing the air direction and a rotating drum body 2. The air duct assembly 1 is wrapped outside the rotating drum body 2 and forms an air path channel with the inside of the rotating drum body 2 to realize heat exchange inside the rotating drum body 2. The air duct assembly 1 is installed on the frame, and a blower or an exhaust fan is connected to the air outlet of the air duct assembly 1.

[0022] In this embodiment, the air duct assembly 1 includes a plurality of air ducts 11 arranged along the length direction of the rotating drum body 2 and an annular track 12 arranged at both ends of the rotating drum body 2. The air ducts 11 are slidably arranged on the annular track 12, and an arc-shaped cover 13 is arranged inside the annular track 12. The air ducts 11 and the arc-shaped cover 13 form an integrated cavity structure for air exchange inside. The air ducts 11 are slidably arranged on the inner side wall of the annular track 12 and can rotate 360° along the annular track 12 to realize the switching between the positive pressure drying mode of downward blowing and the negative pressure drying mode of upward air extraction. The number of the air ducts 11 is two. In other embodiments, the number of the air ducts 11 can also be appropriately increased according to actual needs to further improve the drying efficiency. The arc-shaped cover 13 is arranged at the inner ring formed by the annular arrangement of the plurality of air ducts 11.

[0023] In this embodiment, the rotary drum body 2 includes a rotary cage 21, a collection channel 22, a heat exchange unit, and a control unit for controlling the normal operation of the entire rotary drum body 2 (the control unit can adjust the rotation speed of the rotary cage 21, air flow parameters, etc. to meet the specific requirements of different batches of filter beads, ensuring the drying efficiency and product quality). The rotary cage 21 is the core part of the drying equipment and is usually designed in a cylindrical shape. The filter beads enter from the feeding end and gradually move towards the discharging end as the rotary cage rotates. The rotary cage can rotate in two directions to better control the movement and drying effect of the filter beads inside. The collection channel 22 is arranged on the inner wall of the discharging end of the rotary cage 21. The collection channel 22 is used to collect the dried filter beads. These channels usually extend radially along the rotary cage to ensure that the dried filter beads can be effectively discharged. There is a channel for air circulation between the heat exchange unit and the air duct assembly 1, and the air duct assembly 1 is wrapped outside the rotary cage 21.

[0024] The working principle of the rotary drum body 2 in this embodiment is as follows:

[0025] After the filter beads are fed into the rotary cage 21, as the rotary cage 21 rotates, they continuously tumble inside the drum, increasing the surface area in contact with the hot air. While the rotary cage 21 rotates, the air duct assembly 1 outside it also rotates along the annular track 12 together. The hot air exchanges heat with the surface of the filter beads through the rotary cage 21, taking away the moisture. Due to the presence of the air duct assembly 1, the heat exchange efficiency is significantly improved. This process needs to be carefully controlled to avoid the filter beads from melting or deforming due to high temperature. The humidity control system and the wind speed adjustment ensure the optimization of the drying environment, reducing energy consumption and improving the drying efficiency. The dried filter beads are discharged through the collection channel 22 and are ready to enter the next packaging or processing process.

[0026] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An air duct adjusting device for a rotary dryer, characterized in that, It includes an air duct assembly (1) with variable wind direction and a rotary drum body (2). The air duct assembly (1) is wrapped outside the rotary drum body (2) and forms an air passage with the inside of the rotary drum body (2) to realize heat exchange inside the rotary drum body (2). The air duct assembly (1) is installed on a frame, and a blower or an exhaust fan is connected to the air outlet of the air duct assembly (1).

2. The air duct adjusting device of the rotary drum dryer according to claim 1, characterized in that, The air duct assembly (1) includes a plurality of air ducts (11) arranged along the length direction of the rotary drum body (2) and annular tracks (12) arranged at both ends of the rotary drum body (2). The air ducts (11) are slidably arranged on the annular tracks (12). An arc-shaped cover (13) is arranged inside the annular tracks (12). The air ducts (11) and the arc-shaped cover (13) form an integral cavity structure for air to exchange inside.

3. The air duct adjusting device of the rotary dryer according to claim 2, wherein The air ducts (11) are slidably arranged on the inner side wall of the annular tracks (12) and can rotate 360° along the annular tracks (12) to realize the switching between the positive pressure drying mode of downward air blowing and the negative pressure drying mode of upward air extraction.

4. The air duct adjusting device of the rotary dryer according to claim 3, characterized in that, The number of the air ducts (11) is not less than two.

5. The air duct adjusting device of the rotary drum dryer according to claim 3, wherein, The arc-shaped cover (13) is arranged at the inner ring formed by the annular arrangement of a plurality of air ducts (11).

6. The air duct adjusting device of the rotary dryer according to any one of claims 1-5, characterized in that, The rotary drum body (2) includes a rotary cage (21), a collection channel (22), a heat exchange unit and a control unit for controlling the normal operation of the whole rotary drum body (2). The collection channel (22) is arranged on the inner wall of the discharge end of the rotary cage (21). A channel for air circulation is provided between the heat exchange unit and the air duct assembly (1). The air duct assembly (1) is wrapped outside the rotary cage (21).

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