A drying device for tobacco flavor materials

Abstract

The application discloses a drying device for tobacco flavor raw materials, which comprises a drying box, a plurality of material placing plates arranged in the drying box from top to bottom, and a drying air circulation assembly connected to the bottom of the drying box; the drying air circulation assembly comprises a main air duct and a drying fan arranged at the bottom of the drying box; the main air duct is arranged at the two sides of the inside of the drying box, and the material placing plates are arranged on the side supports of the inner wall of the main air duct; the three-layer stepped main air duct design is adopted, the cross sections of the air ducts are gradually reduced, the flow velocity of the air flow is increased due to the reduction of the air duct, the uneven distribution of the air speed and the air volume between the layers is effectively avoided by cooperating with the layered independent air supply structure, the hot air flow direction is optimized by cooperating the oblique ventilation groove with the air deflector, the hot air uniformly penetrates the material layer, the drying dead angle is reduced, the wave-shaped partition plate increases the air flow disturbance, the laminar flow state is destroyed, the heat and mass transfer efficiency is improved, the consistency of the overall moisture content of the material is realized, and the rework rate is reduced.

Description

Technical Field

[0001] This application relates to the field of tobacco flavoring raw material processing technology, specifically a drying device for tobacco flavoring raw materials. Background Technology

[0002] Raw materials for tobacco flavorings are characterized by fine particles, large fluctuations in moisture content, and a high content of volatile and heat-sensitive aroma components. The drying process must efficiently remove moisture while minimizing the loss and thermal degradation of aroma substances. Therefore, the industry commonly employs controlled airflow and relatively gentle drying curves, combined with adjustable airflow and real-time temperature monitoring, to achieve a balance between efficiency and quality.

[0003] Traditional box-type or shelf-type drying equipment often uses bottom or side air supply and natural or semi-forced circulation. In this method, the stacking of multiple layers of materials leads to uneven airflow distribution between layers, often resulting in the upper layer being drier and the lower layer being wetter, or a large difference in dryness between the edges and the center. Straight or unidirectional air supply easily forms laminar flow, making it difficult to break the heat exchange boundary layer and resulting in low heat and mass transfer efficiency. In addition, the mismatch between the cross-section of the air duct and the resistance of the multiple layers of materials, and the phenomenon of "air intake" or "air shortage" in a single layer, leads to a longer drying cycle or rework, resulting in uneven drying of materials. Summary of the Invention

[0004] The technical problem to be solved by this application is to overcome the existing defects and provide a drying device for tobacco flavoring raw materials, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, this application provides the following technical solution: a drying device for tobacco flavoring raw materials, including a drying box, wherein multiple material placement plates are arranged sequentially from top to bottom inside the drying box, and a drying air circulation component is connected to the bottom of the drying box;

[0006] The drying air circulation assembly includes a main air duct and a drying fan located at the bottom of the drying chamber. The main air duct is located on both sides inside the drying chamber, and the material placement plate is located on the side support of the inner wall of the main air duct. Several inclined ventilation slots are linearly distributed on the side of the main air duct. The inclined ventilation slots are arranged at equal intervals along the longitudinal direction of the main air duct.

[0007] Air guide vanes are installed inside the main air duct.

[0008] As a preferred technical solution of this application, the main air duct has a three-layer structure and a stepped design, and one air duct corresponds to one material placement plate.

[0009] As a preferred technical solution of this application, the material placement plate is densely covered with multiple ventilation holes.

[0010] As a preferred technical solution of this application, the outer wall of the drying oven adopts a double-layer structure, and the cavity in the middle is provided with heat insulation material, which is rock wool or aluminum silicate fiber felt.

[0011] As a preferred technical solution of this application, the air guide plate is provided with partitions at intervals.

[0012] As a preferred technical solution of this application, the partition is a corrugated partition with a spacing of 50-100mm.

[0013] As a preferred technical solution of this application, a temperature sensor is provided inside the main air duct.

[0014] As a preferred technical solution of this application, the material placement plate is a detachable structure and is slidably disposed inside the drying oven.

[0015] As a preferred technical solution of this application, the material placement plate is designed as a right-angle plate, and a handle is provided on one side plate perpendicular to the horizontal plane.

[0016] Compared with the prior art, the beneficial effects of this application are: This application adopts a three-layer stepped main air duct design, so that the cross-section of each layer of air duct gradually decreases, the air duct becomes smaller and the airflow velocity increases. Combined with the layered independent air supply structure, it effectively avoids the problem of uneven distribution of wind speed and air volume between layers.

[0017] The combined design of the slanted ventilation slots and air guide plates optimizes the direction of hot air flow, allowing hot air to penetrate the material layer evenly and reducing drying dead zones. The corrugated baffles increase airflow disturbance, disrupt laminar flow, improve heat and mass transfer efficiency, achieve consistent overall moisture content of the material, and reduce rework rate.

[0018] Layered independent air supply and enhanced heat exchange design improve heat utilization efficiency by 15-20%, shorten drying time by about 30%, reduce the lag stage in the process of reducing material moisture content, improve batch production efficiency, and the double-layer insulation box and rock wool insulation layer effectively reduce heat loss, improve thermal efficiency, and reduce energy consumption costs. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this application;

[0020] Figure 2 This is the main sectional view of this application;

[0021] Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle;

[0022] Figure 4 This is a schematic diagram of the partition structure.

[0023] In the diagram: 1. Drying oven, 2. Material placement plate, 3. Main air duct, 4. Drying fan, 5. Ventilation slot, 6. Air guide plate, 7. Side support, 8. Partition, 9. Temperature sensor, 10. Handle. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application (for ease of description and understanding, hereinafter referred to as...), Figure 2 (The above is described above). All other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0025] Example 1

[0026] Please see Figure 1 , Figure 2 and Figure 3 This application provides a technical solution: a drying device for tobacco flavoring raw materials, including a drying box 1, in which three material placement plates 2 are arranged from top to bottom to provide sufficient placement space for tobacco flavoring raw materials, and the material placement plates 2 are located on the side support 7.

[0027] The bottom of the drying chamber 1 is connected to a drying air circulation assembly, which includes a main air duct 3 and a drying fan 4 located at the bottom of the drying chamber 1. The drying fan 4 is a centrifugal fan with a power of 2.2kW and a maximum air volume of 3000m³ / h. The fan speed can be adjusted by a frequency converter.

[0028] The main air duct 3 is located on both sides inside the drying chamber 1, and adopts a three-layer structure with a stepped design. Each layer of the air duct has an increasing air duct area from bottom to top, ensuring that the materials in each layer receive appropriate air velocity. Each layer of the air duct corresponds to a material placement plate 2, realizing independent air supply to each layer.

[0029] Several inclined ventilation slots 5 are linearly distributed on the side of the main air duct 3. The inclination angle of the ventilation slots 5 is 30°. The inclined ventilation slots 5 are arranged at equal intervals along the longitudinal direction of the main air duct 3 with a spacing of 100mm. A total of 12 ventilation slots 5 are set in each layer of the air duct, and the ventilation slots 5 are oriented obliquely upward and obliquely downward.

[0030] The main air duct 3 is equipped with air guide plates 6. The air guide plates 6 are installed at different angles to change the air direction so that the air can be discharged from the ventilation slot 5.

[0031] Temperature sensors 9 are installed inside the main air duct 3. The temperature sensors 9 are PT100 platinum resistance temperature sensors with a temperature measurement accuracy of ±0.1℃ and a temperature measurement range of 0-150℃. The temperature sensors 9 are located in the middle of the three-layer air duct to monitor the temperature changes of each layer in real time.

[0032] Temperature sensor 9 is electrically connected to the temperature controller, which can be set to a target temperature range of 40-120℃ to achieve precise temperature control.

[0033] The material placement plate 2 is a detachable structure and is slidably installed inside the drying chamber 1. The side support 7 is installed in the drying chamber 1, and the protrusion under the material placement plate 2 corresponds to the groove of the side support 7 to ensure the stability of the material placement plate 2.

[0034] The material placement plate 2 adopts a right-angle plate design, including a horizontal placement surface and a vertical guard edge to prevent the material from scattering during the drying process. The vertical guard edge is equipped with a handle 10, which is made of engineering plastic and has an anti-slip surface to facilitate the operator's gripping.

[0035] The material placement plate 2 is densely covered with multiple ventilation holes, each 5mm in diameter and 10mm apart. This ensures a surface porosity of 30%, guaranteeing good air permeability.

[0036] Example 2

[0037] Please see Figure 1 , Figure 2 , Figure 3 and Figure 4 For example, based on Example 1, the outer wall of the drying oven 1 adopts a double-layer structure, forming a 50mm thick cavity between the inner and outer walls. The cavity is filled with rock wool insulation material, which effectively reduces heat loss and improves the energy efficiency ratio.

[0038] The ventilation duct 5 is equipped with partitions 8 at intervals. The partitions 8 are corrugated with a wave height of 20mm and a wavelength of 60mm. The spacing between the partitions 8 is 75mm, and 3-4 corrugated partitions 8 are set on each air guide plate 6. The corrugated design can enhance airflow turbulence, break the laminar flow state, and improve heat transfer efficiency by about 15-20%.

[0039] In use: Spread the tobacco flavoring raw materials to be dried evenly on the material placement plate 2, with a thickness controlled at 20-30mm. Slide the material-filled placement plate 2 into the respective chute of the drying chamber 1. Set the drying temperature and time, start the equipment, and the system will automatically enter the drying program. The drying fan 4 starts, generating a high-speed airflow that is conveyed upward through the main air duct 3. The temperature sensor 9 monitors the temperature inside the main air duct 3 in real time. The hot airflow enters the material area of ​​each layer through the inclined ventilation slot 5. The air guide plate 6 guides the airflow direction. The hot airflow passes through the ventilation holes on the material placement plate 2, making full contact with the tobacco flavoring raw materials and removing moisture. The three-layer stepped air duct design ensures that the materials in each layer are heated evenly, shortening the drying time by 30%. After drying, remove the material placement plate 2 using the handle 10 to complete the drying operation.

[0040] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A drying apparatus for tobacco flavoring raw materials, comprising a drying chamber (1), wherein a plurality of material placement plates (2) are arranged sequentially from top to bottom inside the drying chamber (1), characterized in that: The bottom of the drying chamber (1) is connected to a drying air circulation assembly; The drying air circulation assembly includes a main air duct (3) and a drying fan (4) located at the bottom of the drying chamber (1); the main air duct (3) is located on both sides inside the drying chamber (1), and the material placement plate (2) is located on the side support (7) on the inner wall of the main air duct (3); the main air duct (3) has a number of inclined ventilation slots (5) linearly distributed on its side; the inclined ventilation slots (5) are arranged at equal intervals along the longitudinal direction of the main air duct (3); A guide vane (6) is installed inside the main air duct (3).

2. The drying apparatus for tobacco flavoring raw materials according to claim 1, characterized in that: The main air duct (3) has a three-layer structure and a stepped design, and one air duct corresponds to one material placement plate (2).

3. The drying apparatus for tobacco flavoring raw materials according to claim 1, characterized in that: The material placement plate (2) is covered with multiple ventilation holes.

4. The drying apparatus for tobacco flavoring raw materials according to claim 1, characterized in that: The outer wall of the drying oven (1) has a double-layer structure, and the cavity in the middle is filled with heat insulation material, which is rock wool or aluminum silicate fiber felt.

5. The drying apparatus for tobacco flavoring raw materials according to claim 1, characterized in that: The inclined ventilation slot (5) is provided with partitions (8) at intervals.

6. The drying apparatus for tobacco flavoring raw materials according to claim 5, characterized in that: The partition (8) is a corrugated partition (8), and the spacing between the partitions (8) is 50-100mm.

7. The drying apparatus for tobacco flavoring raw materials according to claim 1, characterized in that: A temperature sensor (9) is installed inside the main air duct (3).

8. The drying apparatus for tobacco flavoring raw materials according to claim 1, characterized in that: The material placement plate (2) is a detachable structure and is slidably installed inside the drying oven (1).

9. The drying apparatus for tobacco flavoring raw materials according to claim 1, characterized in that: The material placement plate (2) is designed as a right-angle plate, and a handle (10) is provided on one side plate perpendicular to the horizontal plane.

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