A drum-type tobacco roasting apparatus

Abstract

The application discloses a drum-type tobacco baking device, which comprises a rack, a cylinder drying part fixed on the rack, a feeding part fixedly connected with a feeding opening of the cylinder drying part, a hot air system arranged outside the cylinder drying part and fixedly connected with the feeding part, a discharging part fixedly connected with a discharging opening of the cylinder drying part, and a moisture removal system arranged outside the cylinder drying part and close to one side of the discharging part and communicated with the inside of the cylinder drying part. The adjustable range of the hot air temperature is increased, the drying uniformity and looseness of the tobacco material are improved, and the tobacco baking quality is improved.

Description

Technical Field

[0001] This invention relates to the field of tobacco processing technology, and more particularly to a drum-type tobacco roasting apparatus. Background Technology

[0002] In the re-drying of tobacco leaves and the baking of burley tobacco, the mesh belt baking technology of "drying, cooling, and rehydration" is used. With the industry's increasing focus on the quality and stability of cigarette raw materials and finished products, the incompatibility between this traditional baking method and the technical requirements for improving the quality assurance level of raw materials and finished products has become increasingly prominent. The main problems are: 1) To solve the uneven moisture content during the static drying of tobacco leaves, the traditional re-drying method has to use excessive dehydration and drying of tobacco leaves, resulting in high tobacco processing intensity and significant aroma loss; 2) The method of using multiple drying zones for excessive dehydration and rehydration of tobacco leaves results in a longer re-drying process, more processing steps, and higher energy consumption, leading to higher processing costs for re-drying enterprises; 3) Under this processing method, due to the influence of the thickness of the spreading material and the uniformity of wind speed, the problem of uneven and unstable leaf moisture content still exists. Summary of the Invention

[0003] In view of the above, the present invention aims to provide a drum-type tobacco roasting apparatus to solve the aforementioned technical problems.

[0004] The technical solution adopted in this invention is as follows:

[0005] This invention provides a drum-type tobacco roasting apparatus, comprising:

[0006] frame;

[0007] A cylindrical drying section fixed to the frame;

[0008] A feed section fixedly connected to the feed inlet of the drying section of the cylinder;

[0009] A hot air system is installed outside the drying section of the cylinder and is fixedly connected to the feeding section;

[0010] The discharge section is fixedly connected to the discharge port of the drying section of the cylinder;

[0011] A dehumidification system is installed on the outside of the cylinder drying section near the discharge section and communicates with the inside of the cylinder drying section.

[0012] Optionally, the feeding section includes:

[0013] Feed hood;

[0014] The feed inlet and air inlet are provided on the feed hood, with the feed inlet located below the air inlet;

[0015] The air inlet inputs hot air from the hot air system into the feeding section, and then delivers it to the interior of the cylindrical drying section.

[0016] Optionally, the feed hood further includes an air inlet chamber, which is connected to the air inlet.

[0017] Optionally, the cylindrical drying section includes:

[0018] cylindrical body;

[0019] The stir-frying plate, the guide plate, and the temperature probe are installed inside the cylinder;

[0020] The stir-frying plate covers three-quarters of the front section of the cylinder, and the guide plate covers one-quarter of the rear section of the cylinder.

[0021] Multiple temperature probes are evenly distributed on the inner wall of the cylinder and along the axial direction of the cylinder.

[0022] Multiple first heating tubes are evenly arranged on the inner wall of the cylinder, and the first heating tubes extend along the axial direction of the cylinder.

[0023] Optionally, the stir-frying plate is evenly provided with a plurality of second heating tubes, which extend along the length of the stir-frying plate.

[0024] Optionally, the dehumidification system includes:

[0025] Moisture-wicking cover;

[0026] The desiccant connected to the desiccant hood;

[0027] The desiccant is connected to the desiccant damper;

[0028] The dehumidification duct is connected to the dehumidification fan.

[0029] Optionally, the desiccant hood is provided with a first air inlet, a second air inlet, and an exhaust outlet;

[0030] The first air inlet is connected to the discharge section;

[0031] The second air inlet is connected to the dehumidification hood.

[0032] Optionally, a filter screen is provided inside the moisture hood;

[0033] The air intake direction of the first air inlet is consistent with the radial direction of the filter screen.

[0034] Optionally, the hot air system includes:

[0035] First air supply subsystem and second hot air subsystem;

[0036] The first air supply subsystem includes a first hot air heater and a first hot air duct;

[0037] The first end of the first hot air duct is connected to the first hot air heater, and the second end of the first hot air duct is connected to the air inlet.

[0038] The second hot air subsystem includes a second hot air heater and a second hot air duct;

[0039] The first end of the second hot air duct is connected to the second hot air heater, and the second end of the second hot air duct is connected to the dehumidification system.

[0040] The above-described solution of the present invention has at least the following beneficial effects:

[0041] The above-mentioned solution of the present invention includes: a frame; a cylindrical drying section fixed on the frame; a feeding section fixedly connected to the feeding port of the cylindrical drying section; a hot air system disposed outside the cylindrical drying section and fixedly connected to the feeding section; a discharge section fixedly connected to the discharge port of the cylindrical drying section; and a dehumidification system disposed outside the cylindrical drying section near the discharge section and communicating with the interior of the cylindrical drying section. By adding an electric heating device to the steam pipe entering the heat sink and increasing the heat dissipation area of ​​the heat sink, the adjustable range of the hot air temperature is increased; by changing the structure of the roasting plate, the drying uniformity and looseness of the tobacco material are improved; based on online detection and control methods, an adaptive control method is adopted, and the equipment is intelligently controlled by an intelligent control system, thereby improving the tobacco roasting quality. Attached Figure Description

[0042] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described below with reference to the accompanying drawings, wherein:

[0043] Figure 1 This is a schematic diagram of the structure of the drum-type tobacco roasting apparatus provided in an embodiment of the present invention.

[0044] Figure 2 This is a schematic diagram of the main structure of the hot air system and the dehumidification system provided in an embodiment of the present invention;

[0045] Figure 3 A left view of one embodiment of the feed hood provided in this invention;

[0046] Figure 4 This is a schematic diagram of the dehumidification system and discharge hood provided in an embodiment of the present invention;

[0047] Figure 5 This is a schematic diagram of the structure of the moisture-wicking cover provided in an embodiment of the present invention;

[0048] Figure 6 A schematic diagram of the structure of one embodiment of the cylindrical body provided in this invention;

[0049] Figure 7 This is a schematic diagram of the structure of a bent-type frying plate with a heating tube provided in an embodiment of the present invention. Detailed Implementation

[0050] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0051] This invention proposes an embodiment of a drum-type tobacco roasting apparatus, specifically, as follows: Figure 1 As shown, it includes:

[0052] Rack size 600;

[0053] A cylindrical drying section 200 is fixed to the frame 600;

[0054] A feed section 100 is fixedly connected to the feed inlet of the cylindrical drying section 200;

[0055] A hot air system 300 is installed outside the cylindrical drying section 200 and is fixedly connected to the feeding section 100;

[0056] A discharge section 500 is fixedly connected to the discharge port of the cylindrical drying section 200;

[0057] A dehumidification system 400 is installed on the outside of the cylindrical drying section 200 near the discharge section 500 and communicates with the inside of the cylindrical drying section 200.

[0058] In this embodiment, the material enters the cylindrical drying section 200 through the feeding section 100, and the dried material is output to the next process through the discharge section 500. The hot air system 300 sends hot air into the cylindrical drying section 200 through the feeding section 100. The hot air comes into contact with the material and carries away the humid steam generated in the material, thus drying the material. The humid hot air rich in humid steam (i.e., exhaust gas) is discharged from the baking device through the dehumidification system 400.

[0059] The frame 600 supports the cylindrical drying section 200, and is equipped with a transmission system for driving the cylindrical drying section 200, a lifting mechanism for the cylindrical drying section 200 (for lifting when the drying equipment stops), and a tilt adjustment device for the cylindrical drying section 200. As one embodiment, the frame is formed by butt welding of rectangular steel tubes and steel plates. Figure 1 and 2As shown, the feed end of the cylindrical drying section 200 (i.e., the end near the feed section 100) is higher than the discharge end of the cylindrical drying section 200 (i.e., the end near the discharge section 500), which facilitates the output of materials.

[0060] like Figure 3 As shown, the feeding section 100 mainly consists of a feeding hood 110, which is connected to the cylindrical drying section 200. The feeding hood 110 is provided with a feeding port 1102 and an air inlet 1103. The feeding port 1102 is located below the air inlet 1103. The feeding hood 110 is used to connect to the discharge section and the hot air system 300 of the previous process. The feeding port 1102 is used to convey materials (such as tobacco sheets and leaf shreds) to the cylindrical drying section 200. The air inlet 1103 inputs hot air from the hot air system 300 into the feeding section 100, and then conveys it to the cylindrical drying section 200.

[0061] The cylindrical drying section 200 includes a cylindrical body 210 and a stir-frying plate 2101, a guide plate 2103, and temperature probes 2104 disposed within the cylindrical body 210. The stir-frying plate 2101 is disposed in the front three-quarters of the cylindrical drying section 200, and the guide plates 2103 are disposed in a staggered manner in the rear quarter section. Temperature probes 2104 (3 to 5) are evenly distributed along the axial direction of the inner drying cylinder and close to the inner cylinder wall of the drying wire. The data collected by the temperature probes 2104 is transmitted to the controller via radio signals. The stir-frying plate 2101 dries the material, the guide plates 2103 loosen the material, and the temperature probes 2104 detect the temperature of the cylinder wall or the material.

[0062] As an example, the controller adopts a modular programming structure to achieve adaptive intelligent control of drying temperature and graphical monitoring of key parameters.

[0063] As one embodiment, multiple stir-frying plates 2101 are evenly distributed circumferentially along the front 3 / 4 of the cylinder 210. The stir-frying plates 2101 extend axially along the cylinder and are used to fully heat the material during the rotation of the cylinder 210. The material is lifted and scattered under the action of the stir-frying plates 2101, and then comes into contact with the hot air to achieve drying. Staggered guide plates 2103 are arranged circumferentially along the rear 1 / 4 of the cylinder 210. The guide plates 2103 extend axially along the cylinder and are used to fully loosen the material during the rotation of the cylinder. The material is repeatedly lifted and scattered under the action of the guide plates 2103, and then comes into full contact with the hot air to achieve uniform drying, making the material inside the cylinder looser and the drying more uniform.

[0064] Preferably, a plurality of heating tubes 2102 are evenly arranged on the inner wall of the cylinder 210, such as Figure 6As shown, the heating tube 2102 extends along the axial direction of the cylinder 210. In this preferred embodiment, the baking apparatus further includes a steam heating system, which delivers the generated steam to the heating tube on the cylinder. The heating tube releases heat, heating the material inside the cylinder and drying the material. The condensate formed after the steam condenses is discharged through a drain pipe.

[0065] Based on this, the preferred option is, such as Figure 7 As shown, multiple heating tubes 2102 are also evenly distributed on the stir-fry plate 2101. The heating tubes 2102 extend along the length of the stir-fry plate 2101.

[0066] In this preferred embodiment, the drying equipment operates as follows: the inner wall of the cylinder 210 and the stir-frying plate 2101 are heated to a set temperature by steam. The material is fed into the drying equipment through the feed inlet. During the rotation of the cylinder 210, the stir-frying plate 2101 continuously stirs the material, and the material continuously contacts the inner wall of the cylinder 210 and the stir-frying plate 2101 for conduction drying. At the same time, hot air with a set temperature and wind speed blown out from the first hot air subsystem fully contacts the material in the cylinder for convective drying. The dried humid hot air is discharged from the cylinder by the exhaust fan 430 at the discharge end. The hot air duct and the exhaust pipe are equipped with dampers. The corresponding adjustment is made based on the data fed back by the outlet moisture meter. The control program adjusts the outlet moisture by changing the exhaust volume and the hot air speed, thereby achieving control of the outlet moisture.

[0067] Compared to existing drum dryers, the front 3 / 4 of the drum drying section 200 is equipped with a stir-frying plate 2101 to ensure the material is fully dried, while the rear 1 / 4 is equipped with staggered guide plates 2103 to ensure the material is fully dispersed by being thrown up and down. At the same time, it allows the hot air to fully contact the material, which helps to improve the uniformity, stability and sensory quality of the dried material, and improve the moisture uniformity of the outlet material.

[0068] Furthermore, such as Figures 1 to 3 As shown, the feed hood 110 includes an air inlet cavity 1101 formed by an outer side plate and an inner side plate. The air inlet cavity 1101 is connected to the air inlet 1103. The outer side plate is provided with an air inlet 1103 and a feed inlet 1102. The feed inlet 1102 is located below the air inlet 1103. Hot air enters the cylinder through the air inlet 1103.

[0069] like Figure 4 As shown, the dehumidification system 400 includes a dehumidification hood 410, a dehumidification damper 420, a dehumidification fan 430, and a dehumidification duct 440 connected in sequence. The dehumidification hood 410 includes a first air inlet, a second air inlet, and an exhaust outlet. The first air inlet of the dehumidification hood 410 is connected to the exhaust outlet of the discharge hood 510, and the second air inlet is connected to the second hot air duct 330. Please refer to [link / reference needed]. Figure 3Inside the drying section 200, hot air comes into contact with the material, carrying away the humid steam generated in the material. The humid hot air is then discharged through the dehumidification system. A second hot air duct 330 delivers hot air at a certain temperature to mix with the high-humidity exhaust gas, raising the temperature of the exhaust gas and preventing condensation.

[0070] For example Figure 5 As shown, a rotating filter 450 is provided inside the desiccant hood 410. The air intake direction of the first air inlet of the desiccant hood 410 is consistent with the radial direction of the filter 450. After the desiccant enters the desiccant hood 410 through the first air inlet, it passes through the rotating filter and is discharged from the desiccant duct 440. The rotating filter prevents fine smoke fragments or dust mixed in with the humid hot air from being discharged with the desiccant. Preferably, compressed air is intermittently introduced into the filter to prevent fine smoke fragments or dust from clogging the filter.

[0071] like Figure 2 As shown, the hot air system includes a first hot air subsystem and a second hot air subsystem. The first hot air subsystem includes a first hot air heater 340 and a first hot air duct 320. The first end of the first hot air duct 320 is connected to the first hot air heater 340, and the second end of the first hot air duct 320 is connected to the air inlet 1103. An electric heating device is installed on the steam pipe entering the first hot air heater 340. The temperature adjustable range of the electric heating device is (120~250)℃. The second hot air subsystem includes a second hot air heater 310 and a second hot air duct 330. The first end of the second hot air duct 330 is connected to the second hot air heater 310, and the second end of the second hot air duct 330 is connected to the second air inlet of the dehumidification hood 410.

[0072] Understandably, the first and second hot air subsystems can provide hot air at different temperatures and volumes, making the drying of materials more efficient.

[0073] Preferably, the baking apparatus further includes airflow regulating devices for the first hot air duct 320, the second hot air duct 330, and the dehumidification duct 440, respectively. The hot air velocity inside the cylindrical drying section 200 is adjusted by regulating the hot air volume, and the amount of dehumidification is adjusted by regulating the dehumidification volume, thereby controlling the humidity inside the cylindrical drying section 200, i.e., the amount of dehumidification from the cylindrical drying section 200.

[0074] The discharge section 500 includes a conveying vibrating trough and a discharge hood 510 that covers the conveying vibrating trough. The top of the discharge hood 510 is provided with an exhaust port. The material output from the discharge port of the cylinder drying section 200 falls onto the conveying vibrating trough of the discharge section 500 under the action of gravity, and is then vibrated and output by the conveying vibrating trough.

[0075] An embodiment of the present invention also provides a drum-type tobacco roasting method, which is applied to a drum-type tobacco roasting device, and the specific method is as follows:

[0076] After leaf threshing and wind separation, the tobacco leaves (moisture content 17.0%) are conveyed through a vibrating trough to the drum-type tobacco roaster (rotation speed 14 r / min) described in Example 1. They are dried to a moisture content of 12.5% ​​under the conditions of drum wall temperature 125℃, hot air temperature 130℃, hot air velocity 0.8 m / s, and dehumidification damper opening 60%. The dried leaves are then conveyed through a discharge vibrating trough to the packing process for packaging.

[0077] Tobacco leaves from the same origin, grade, and year were used. The samples dried by the traditional mesh belt re-drying machine in the leaf threshing and re-drying plant were used as control samples. The tobacco leaves dried by the baking machine in Example 1 were compared with the control samples. The results are shown in Table 1 below.

[0078] Table 1: Comparison of moisture content, temperature, and leaf structure of tobacco obtained by different roasting methods

[0079]

[0080] As shown in Table 1, the standard deviation of moisture content in the control sample tobacco was 0.44%, the temperature range was 1.9℃, the coefficient of variation was 0.018, the percentage of large leaves was 30.3%, the percentage of medium leaves was 46.2%, and the percentage of broken leaves was 0.5%. In Example 1, the standard deviation of moisture content in the tobacco after roasting was 0.16%, the temperature range was 0.8℃, the coefficient of variation was 0.009, the percentage of large leaves was 24.8%, the percentage of medium leaves was 47.7%, and the percentage of broken leaves was 0.7%. Compared with the control sample, the tobacco in Example 1 after roasting had more uniform and stable moisture content and temperature, and a more uniform leaf structure.

[0081] Compared with the control sample, the tobacco leaves after drum baking are looser, with more stable and uniform quality indicators and a more reasonable leaf structure.

[0082] After baking and drying, the tobacco leaves were processed into shreds under the same conditions and rolled into cigarettes of the same weight. After balancing the moisture content, Example 1 and the control sample were compared and evaluated. Fifteen people participated in the evaluation, and the results are shown in Table 2.

[0083] Table 2: Comparison of sensory quality of tobacco obtained by different drying methods

[0084]

[0085] As can be seen from Table 2, Example 1 has better sensory quality compared with the control sample, mainly in terms of better aroma quality and aroma quantity, less off-flavors, and better cleanliness and sweetness.

[0086] A drum-type tobacco roasting method involves adding lining material to burley tobacco sheets (or shredded tobacco with a moisture content of 34.5%), which are then conveyed via a vibrating trough to the drum-type tobacco roaster (rotation speed of 6 r / min) described in Example 1. The sheets are dried to a moisture content of 13.5% under conditions of 150°C drum wall temperature, 150°C hot air temperature, 0.8 m / s hot air velocity, and 70% opening of the dehumidification damper. The dried sheets are then transferred to the lining material adding process via a discharge vibrating trough.

[0087] Burley tobacco leaves of the same origin, grade, and year were used. The samples dried by the traditional mesh belt re-drying machine of the Burley tobacco processing line were used as control samples. The tobacco leaves dried by the baking machine of Example 1 were compared with the control samples. The results are shown in Table 3 below.

[0088] Table 3: Comparison of moisture content and temperature of tobacco obtained by different roasting methods

[0089]

[0090] As shown in Table 3, the standard deviation of moisture content in the control sample tobacco was 0.47%, the temperature range was 2.1℃, and the coefficient of variation was 0.020; the standard deviation of moisture content in the tobacco after roasting in Example 1 was 0.17%, the temperature range was 0.9℃, and the coefficient of variation was 0.011. Compared with the control sample, the moisture content and temperature of the tobacco after roasting in Example 1 were more uniform and stable.

[0091] Compared with the control sample, the tobacco leaves after drum drying were looser and had more stable and uniform quality indicators.

[0092] The dried tobacco leaves were processed into shreds and rolled into cigarettes of the same weight under the same conditions. After the moisture content was balanced, Example 1 and the control sample were compared and evaluated. Fifteen people participated in the evaluation, and the results are shown in Table 4.

[0093] Table 4: Comparison of sensory quality of tobacco obtained by different drying methods

[0094]

[0095] As can be seen from Table 4, Example 1 has better sensory quality compared with the control sample, mainly in terms of better aroma quality and aroma quantity, higher smoke concentration, more delicate smoke, less irritation, and better cleanliness.

[0096] A drum-type tobacco roasting method involves feeding a certain blend of tobacco shreds (moisture content 19.0%) into a drum-type tobacco roaster (rotation speed 10 r / min) as described in Example 1 via a vibrating trough. The shreds are dried to a moisture content of 12.8% under conditions of 125°C drum wall temperature, 115°C hot air temperature, 0.6 m / s hot air velocity, and 60% opening of the exhaust damper. The dried shreds are then transferred to the blending and flavoring process via a discharge vibrating trough.

[0097] Using the same formula of tobacco shreds, and taking the traditional drum-type leaf shred drying sample of the tobacco processing line as a control sample, the tobacco shreds dried by the roasting machine of Example 1 were compared with it. The results are shown in Table 5 below.

[0098] Table 5: Comparison of moisture content, filling value, and tobacco structure of tobacco shreds obtained by different drying methods

[0099]

[0100] As shown in Table 5, the standard deviation of moisture content in the control sample tobacco was 0.17%, the filling value was 4.03 cm³ / g, and the range of filling values ​​was 0.46 cm³ / g. In Example 1, the standard deviation of moisture content in the roasted tobacco was 0.15%, the filling value was 4.10 cm³ / g, and the range of filling values ​​was 0.33 cm³ / g. Compared with the control sample, the moisture content and filling value of the roasted tobacco in Example 1 were more uniform and stable, the filling value was better, and the difference in tobacco shred structure was not significant.

[0101] Compared with the control sample, the tobacco shreds after drum roasting are looser, more elastic, and have more stable and uniform quality indicators.

[0102] After baking and drying, the tobacco shreds were rolled into cigarettes of the same weight under the same conditions. After balancing the moisture content, Example 1 and the control sample were compared and evaluated. Fifteen people participated in the evaluation, and the results are shown in Table 6. Table 6: Comparison of sensory quality of tobacco obtained by different drying methods

[0103]

[0104] As can be seen from Table 6, Example 1 has better sensory quality compared with the control sample, mainly in terms of better aroma quality and aroma quantity, better permeability, and higher smoke concentration.

[0105] In summary, the tobacco dried using the drum-type tobacco roasting apparatus of this embodiment is relatively soft, with uniform moisture content, resulting in consistent product quality and sensory characteristics. By adding an electric heating device to the steam pipe entering the heat sink and increasing the heat dissipation area of ​​the heat sink, the adjustable range of the hot air temperature is increased. By modifying the roasting plate structure, the drying uniformity and looseness of the tobacco material are improved. Based on online detection and control methods, an adaptive control method is adopted, and an intelligent control system is used to intelligently control the equipment, thereby improving the quality of tobacco roasting.

[0106] In this invention, when directional terms are mentioned, they are relative concepts based on the embodiments. Furthermore, "at least one" refers to one or more, and "more than one" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent the existence of A alone, A and B simultaneously, or B alone. A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects have an "or" relationship. "At least one of the following" and similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, and c can represent: a, b, c, a and b, a and c, b and c, or a and b and c, where a, b, and c can be single or multiple.

[0107] The above description of the structure, features, and effects of the present invention is based on the embodiments shown in the figures. However, the above are only preferred embodiments of the present invention. It should be noted that the technical features involved in the above embodiments and their preferred methods can be reasonably combined and matched by those skilled in the art to form a variety of equivalent solutions without departing from or changing the design concept and technical effects of the present invention. Therefore, the present invention is not limited to the scope of implementation shown in the figures. Any changes made in accordance with the concept of the present invention, or modifications to equivalent embodiments, that do not exceed the spirit covered by the specification and figures, should be within the protection scope of the present invention.

Claims

1. A drum-type tobacco roasting device, characterized in that, include: Rack (600); A cylindrical drying section (200) is fixed on the frame (600); A feed section (100) is fixedly connected to the feed inlet of the cylindrical drying section (200). A hot air system (300) is provided outside the cylindrical drying section (200) and is fixedly connected to the feeding section (100). A discharge section (500) is fixedly connected to the discharge port of the cylindrical drying section (200). A dehumidification system (400) is provided on the outside of the cylindrical drying section (200) near the discharge section (500) and communicates with the inside of the cylindrical drying section (200).

2. The drum-type tobacco roasting apparatus according to claim 1, characterized in that, The feed section (100) includes: Feed hood (110); The feed inlet (1102) and air inlet (1103) are provided on the end face of the feed hood (110), with the feed inlet (1102) located below the air inlet (1103); The air inlet (1103) inputs the hot air from the hot air system (300) into the feed section (100), and then delivers it to the inside of the cylinder drying section (200).

3. The drum-type tobacco roasting apparatus according to claim 2, characterized in that, The feed hood (110) also includes an air inlet cavity (1101), which is connected to the air inlet (1103).

4. The drum-type tobacco roasting apparatus according to claim 1, characterized in that, The cylindrical drying section (200) includes: Cylinder (210); The stir-fry plate (2101), the guide plate (2103), and the temperature probe (2104) are installed inside the cylinder (210). The stir-fry plate (2101) covers the front three-quarters of the cylinder (210), and the guide plate (2103) covers the rear quarter of the cylinder (210). Multiple temperature probes (2104) are uniformly distributed on the inner wall of the cylinder (210) along the axial direction of the cylinder (210). A plurality of first heating tubes (2102) are uniformly arranged on the inner wall of the cylinder (210), and the first heating tubes (2102) extend along the axial direction of the cylinder (210).

5. The drum-type tobacco roasting apparatus according to claim 4, characterized in that, The frying plate (2101) is uniformly provided with a plurality of second heating tubes, which extend along the length of the frying plate (2101).

6. The drum-type tobacco roasting apparatus according to claim 1, characterized in that, The ventilation system (400) includes: Moisture exhaust cover (410); A desiccant (420) connected to the desiccant hood (410); A desiccant fan (430) is connected to the desiccant damper (420). A desiccation duct (440) connected to the desiccation fan (430).

7. The drum-type tobacco roasting apparatus according to claim 6, characterized in that, The moisture exhaust hood (410) is provided with a first air inlet, a second air inlet, and an exhaust outlet; The first air inlet is connected to the discharge section (500); The second air inlet is connected to the dehumidification hood (410).

8. The drum-type tobacco roasting apparatus according to claim 7, characterized in that, The moisture exhaust hood (410) is equipped with a filter screen (450). The air intake direction of the first air inlet is consistent with the radial direction of the filter (450).

9. The drum-type tobacco roasting apparatus according to claim 2, characterized in that, The hot air system (300) includes: First air supply subsystem and second hot air subsystem; The first air supply subsystem includes a first hot air heater (340) and a first hot air duct (320). The first end of the first hot air duct (320) is connected to the first hot air heater (340), and the second end of the first hot air duct (320) is connected to the air inlet (1103); The second hot air subsystem includes a second hot air heater (310) and a second hot air duct (330); The first end of the second hot air duct (330) is connected to the second hot air heater (310), and the second end of the second hot air duct (330) is connected to the dehumidification system (400).

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