Moisture-removing and fragrance-keeping device and process for tobacco leaves

Abstract

The device comprises a drying device, a conveying device and a moisture removing and aroma keeping device body, a drying cavity is formed in the drying device, the conveying device is arranged in the drying cavity and used for conveying tobacco leaves, a first partition plate is arranged in the drying cavity, and a second partition plate is arranged in the first partition plate. The moisture removing and fragrance keeping device comprises a wet and hot air discharging pipe, a hot air recycling pipe, a water vapor recycling pipe and a water vapor separating cavity, the air inlet end of the wet and hot air discharging pipe is communicated with the drying area, the air outlet end of the wet and hot air discharging pipe is communicated with the water vapor separating cavity, and the air inlet end of the wet and hot air discharging pipe is communicated with the moisture regaining area. The water inlet end of the water vapor recovery pipe is communicated with the water vapor separation cavity, the water outlet end of the water vapor recovery pipe is communicated with the moisture regaining area, the air inlet end of the hot air recovery pipe is communicated with the water vapor separation cavity, and the air outlet end of the hot air recovery pipe is communicated with the drying area. Hot air and water vapor are recycled, so that hot air loss and water vapor loss are avoided, fragrance in the hot air and the water vapor is lost due to the fact that fragrance in the tobacco leaves can be lost into exhausted hot air and water vapor in the baking process, and the fragrance can act on the tobacco leaves again due to recycling of the hot air and recycling of the water vapor; the aroma of the tobacco leaves is reserved.

Description

Technical Field

[0001] The present invention relates to the technical field of tobacco leaves, and in particular to a device and process for removing moisture and preserving aroma of tobacco leaves. Background Art

[0002] In the existing tobacco leaf baking device, during the baking process, the aroma of the tobacco leaves will be lost as the baking heat and water vapor are discharged. As a result, after the tobacco leaves are baked, the aroma of the tobacco leaves will be lost, making it difficult to retain the aroma of the tobacco leaves themselves. Summary of the Invention

[0003] The present invention solves one of the problems existing in the existing related technologies to a certain extent. To this end, one purpose of the present invention is to provide a device for dehumidifying and preserving aroma of tobacco leaves, so that the aroma in the tobacco leaves can be preserved.

[0004] A dehumidification and aroma preservation device for tobacco leaves comprises a drying device, a conveying device and a dehumidification and aroma preservation device, a drying chamber is formed in the drying device, the conveying device is in the drying chamber, the conveying device is used to convey tobacco leaves, a first partition is provided in the drying chamber to separate the drying chamber into a drying area and a rehumidification area, the dehumidification and aroma preservation device comprises a hot and humid air exhaust pipe, a hot air recovery pipe, a water vapor recovery pipe and a water vapor separation chamber, the air inlet end of the hot and humid air exhaust pipe is connected to the drying area, the air outlet end of the hot and humid air exhaust pipe is connected to the water vapor separation chamber, the water inlet end of the water vapor recovery pipe is connected to the water vapor separation chamber, and the water outlet end is connected to the rehumidification area, the air inlet end of the hot air recovery pipe is connected to the water vapor separation chamber, and the air outlet end of the hot air recovery pipe is connected to the drying area.

[0005] As a further improvement of the present invention, a second partition is further provided in the drying chamber, which divides the drying area into a main drying area and a cooling area. The main drying area, the cooling area and the rehumidification area are connected in sequence, and the air inlet end of the hot and humid air exhaust pipe is connected to the main drying area and / or the cooling area.

[0006] As a further improvement of the present invention, a first through hole is provided on the first partition plate, and a second through hole is provided on the second partition plate. The transmission device enters the cooling zone from the main drying zone through the first through hole, and the transmission device enters the rehumidification zone from the cooling zone through the second through hole.

[0007] As a further improvement of the present invention, a filter cavity is provided on the water vapor recovery pipe, and a filter structure is provided in the filter cavity.

[0008] As a further improvement of the present invention, a water tank is provided on the water vapor recovery pipe, and the water tank can store the water entering the water vapor recovery pipe.

[0009] As a further improvement of the present invention, the water outlet end of the water vapor recovery pipe extends into the rehumidification zone, a water outlet is provided at the water outlet end of the water vapor recovery pipe, an atomizing nozzle is provided at the water outlet, and the atomizing nozzle is facing the transmission device.

[0010] As a further improvement of the present invention, a pressure pump is provided on the water vapor recovery pipe, and the pressure pump is located between the water tank and the water outlet of the water vapor recovery pipe.

[0011] As a further improvement of the present invention, an air impurity removal filter chamber is provided on the hot air recovery pipe.

[0012] As a further improvement of the present invention, the air outlet end of the hot air recovery pipe extends into the drying area, and a heat sink and a fan are further provided at the air outlet end of the hot air recovery pipe.

[0013] As a further improvement of the present invention, the transmission device includes a transmission belt, the transmission belt is provided with a mesh structure, and the diameter of the mesh is smaller than the size of the tobacco leaves.

[0014] One purpose of the present invention is to provide a process for removing moisture and preserving aroma of tobacco leaves, so that the aroma of the tobacco leaves can be preserved.

[0015] The above purpose is achieved through the following methods: A tobacco leaf moisture removal and aroma preservation process, characterized by comprising the following steps: Step S101, controlling the temperature and humidity in the drying area and the rehumidification area; Step S102, detecting the humidity of the tobacco leaves in the drying area and the humidity of the tobacco leaves in the rehumidification area; Step S103, determining whether the humidity of the tobacco leaves in the drying zone is within a first preset humidity range, and determining whether the humidity of the tobacco leaves in the rehumidification zone is within a second preset humidity range; If yes, the temperature and humidity in step S101 are maintained unchanged; if no, the temperature and humidity in the drying area and / or the rehumidification area are adjusted.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects: 1. The present invention proposes a device for dehumidifying and preserving aroma of tobacco leaves, which recycles hot air and water vapor. While avoiding the loss of hot air and water vapor, the aroma in the tobacco leaves will be lost into the exhausted hot air and water vapor during the baking process, and the aroma lost in the hot air and water vapor will act on the tobacco leaves again due to the recycling of hot air and the recovery of water vapor, so that the aroma of the tobacco leaves can be preserved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 11 is a schematic structural diagram of a tobacco leaf moisture removal and aroma preservation device according to an embodiment; Figure 2 2 is a schematic structural diagram of a drying device in an embodiment; Figure 3 Schematic diagram of the structure of the moisture removal and fragrance preservation device in the embodiment. DETAILED DESCRIPTION

[0018] The following examples illustrate the present invention, but the present invention is not limited to these examples. Modifications to the specific embodiments of the present invention or equivalent replacements of some technical features without departing from the spirit of the present invention should be included in the scope of the technical solution claimed in the present invention.

[0019] Example 1: like Figure 1-3 A dehumidification and aroma preservation device for tobacco leaves comprises a drying device 1, a conveying device 2, and a dehumidification and aroma preservation device 4. A drying chamber 11 is formed in the drying device 1. The conveying device 2 is in the drying chamber 11 and is used to convey tobacco leaves. A first partition 21 is provided in the drying chamber 11 to separate the drying chamber 11 into a drying area 30 and a rehumidification area 33. The dehumidification and aroma preservation device 4 comprises a hot and humid air exhaust pipe 41, a hot air recovery pipe 42, a water vapor recovery pipe 43, and a water vapor separation chamber 44. The air inlet end of the hot and humid air exhaust pipe 41 is connected to the drying area 30, the air outlet end of the hot and humid air exhaust pipe 41 is connected to the water vapor separation chamber 44, the water inlet end of the water vapor recovery pipe 43 is connected to the water vapor separation chamber 44, and the water outlet end is connected to the rehumidification zone 33, the air inlet end of the hot air recovery pipe 42 is connected to the water vapor separation chamber 44, and the air outlet end of the hot air recovery pipe 42 is connected to the drying area 30.

[0020] The present invention proposes a device for dehumidifying and preserving aroma of tobacco leaves. The tobacco leaves enter the drying chamber 11 through the transmission device 2, and are heated, dried, and re-roasted in the drying device 1. During the drying process, the humid air will enter the hot and humid air exhaust pipe 41, and the humid air will be separated from the water vapor through the water vapor separation chamber 44. The water after the water vapor separation will flow back to the rehumidification zone 33 through the water vapor recovery pipe 43. By controlling the spraying of water vapor in the rehumidification zone 33, part of the water vapor will be sprayed onto the tobacco leaves through the water vapor recovery pipe 43 to control the humidity of the tobacco leaves within an appropriate humidity range, and the hot air after the water vapor separation will flow back to the drying zone 30 to recycle the hot air and avoid the loss of heat energy.

[0021] The recycling of hot air and water vapor avoids the loss of hot air and water vapor. At the same time, the aroma of the tobacco leaves will be lost into the exhausted hot air and water vapor during the baking process. The aroma lost in the hot air and water vapor will act on the tobacco leaves again due to the recycling of hot air and the recycling of water vapor, so that the aroma of the tobacco leaves can be preserved.

[0022] A second partition 22 is further provided in the drying chamber 11. The second partition 22 separates the drying zone 30 into a first drying zone 31 and a first cooling zone 32. The first drying zone 31, the first cooling zone 32 and the rehumidification zone 33 are connected in sequence. The air inlet end of the hot and humid air exhaust pipe 41 is connected to the first drying zone 31 and / or the first cooling zone 32.

[0023] In this embodiment, the air inlet end of the hot and humid air exhaust pipe 41 is connected to the first drying zone 31 and the first cooling zone 32 .

[0024] In this embodiment, the drying device 1 includes, from left to right, a first drying zone 31 , a first cooling zone 32 and a rehumidification zone 33 , and the tobacco leaf conveying device 2 carries the tobacco leaves through the drying device 1 from left to right.

[0025] In this embodiment, the first drying zone 31 is mainly used to heat and bake the tobacco leaves, so the water vapor in the tobacco leaves will be released with the air and enter the hot and humid air exhaust pipe 41.

[0026] In this embodiment, the air inlet end of the hot and humid air exhaust pipe 41 is connected to the top of the first drying zone 31 and the top of the first cooling zone 32 .

[0027] In this embodiment, hot air is blown out from the first drying zone 31 to bake and heat the tobacco leaves; hot air is not blown out from the first cooling zone 32 to continue heating and baking the tobacco leaves, but the waste heat or heat transfer from the first drying zone 31 is used to make the first cooling zone 32 have a certain temperature, and the waste heat or heat transfer is used to act on the tobacco leaves to avoid over-baking. At this time, the temperature of the tobacco leaves will also drop to a certain extent.

[0028] The first partition plate 21 has a first through hole 211, and the second partition plate 22 has a second through hole 221. The transfer device 2 passes from the first drying zone 31 to the first cooling zone 32 through the second through hole 221, and then passes from the first cooling zone 32 to the rehumidification zone 33 through the first through hole 211. In this embodiment, the second partition plate 22 is located between the first drying zone 31 and the first cooling zone 32. The first partition plate 21 is located between the first cooling zone 32 and the rehumidification zone 33. The first partition plate 21 and the second partition plate 22 divide the drying chamber 11 into three zones.

[0029] In this embodiment, the transmission device 2 includes a transmission belt, and mesh holes are provided on the transmission belt.

[0030] In this embodiment, the outlet end of the hot air recovery pipe 42 is connected to the first drying zone 31 at the lower end of the first drying zone 31. The hot air flows from bottom to top through the mesh on the conveyor belt and acts on the tobacco leaves on the conveyor belt.

[0031] A water filter chamber 431 is provided on the water vapor recovery pipe 43 , and a first filter structure is provided in the water filter chamber 431 .

[0032] In this embodiment, a first filter screen structure is provided in the water filter cavity 431 , and the first filter screen structure includes one or more layers of filter screens.

[0033] A water tank 432 is provided on the water vapor recovery pipe 43, and the water tank 432 can store the water entering the water vapor recovery pipe 43. The water vapor passes through the water filter chamber 431, and the filtered water enters the water tank 432 and is stored.

[0034] The water outlet end of the water vapor recovery pipe 43 extends into the rehumidification zone 33 , and a water outlet 434 is provided at the water outlet end of the water vapor recovery pipe 43 . An atomizing nozzle is provided at the water outlet 434 , and the atomizing nozzle faces the transmission device 2 .

[0035] A pressure pump 433 is provided on the water vapor recovery pipe 43 , and the pressure pump 433 is located between the water tank 432 and the water outlet 434 of the water vapor recovery pipe 43 .

[0036] A pressure pump 433 is provided between the water outlet end of the water vapor recovery pipe 43 and the water tank 432 , and the water in the water tank 432 can be pumped out by the pressure pump 433 and sprayed out through the atomizing nozzle at the water outlet 434 .

[0037] In this embodiment, the water outlet end of the water vapor recovery pipe 43 extends into the rehumidification zone 33 and is located above the transmission device 2, and the water outlet 434 is on the water vapor recovery pipe 43 and faces the transmission device 2 to spray water vapor onto the tobacco leaves of the transmission device 2.

[0038] In some embodiments, a first temperature detector and a first moisture content detector are provided in the drying zone 30 ; a second temperature detector and a second moisture content detector are provided in the cooling zone; and a third temperature detector and a third moisture content detector are provided in the rehumidification zone 33 .

[0039] In some embodiments, a controller is further included, and the controller is electrically connected to the first temperature detector, the first moisture content detector, the second temperature detector, the second moisture content detector, the third temperature detector and the third moisture content detector respectively.

[0040] The first, second, and third moisture detectors are infrared moisture meters that can directly measure the moisture content of tobacco leaves in real time. The detected moisture content of the tobacco leaves is used to adjust the temperature of the drying and cooling zones in real time, and also to adjust the discharge of moisture from the moisture recovery pipe 43 in the rehumidification zone.

[0041] Before entering the drying zone 31, the tobacco leaves have a moisture content of 13-17%. Controlling the moisture content of the tobacco leaves involves: after the drying zone, the moisture content is 9-12%; after the cooling zone, the moisture content is 8-10%; and after humidification in the rehumidification zone 33, the moisture content is 11-13%. Controlling the moisture content of the tobacco leaves at each stage ensures that the moisture content meets standard requirements while maintaining the aroma retention of the tobacco leaves.

[0042] In some embodiments, when the moisture content of the tobacco leaves detected in the rehumidification zone is less than 11-13%, the number of atomizing water nozzles opened is increased to increase the humidity in the rehumidification zone and thereby increase the moisture content of the tobacco leaves. When the moisture content of the tobacco leaves detected in the rehumidification zone is greater than 11-13%, the number of atomizing water nozzles opened is controlled to be reduced, or the water spraying is stopped or reduced, thereby reducing the humidity in the rehumidification zone and increasing the moisture content of the tobacco leaves. This can effectively control the moisture content of the tobacco leaves.

[0043] An air impurity removal filter chamber 421 is provided in the hot air recovery pipe 42. In this embodiment, a second filter structure is provided in the air impurity removal filter chamber 421. The second filter structure includes one or more layers of filter screens arranged vertically. After being filtered by the filter screens, the air is discharged into the drying area 30. Since the air still has a high heat content, the waste heat can be effectively recovered and utilized, preventing the discharge of a large amount of waste heat.

[0044] The air outlet end of the hot air recovery pipe 42 extends into the drying area 30 , and a heat sink and a fan are further provided at the air outlet end of the hot air recovery pipe 42 .

[0045] In this embodiment, the fan's air inlet is directed toward the hot air recovery pipe 42, and its air outlet is directed toward the heat sink and drying zone 30. The fan blows air through the heat sink and into the drying zone 30. This allows the air, which originally contains residual heat, to be blown into the drying zone 30 after passing through the heat sink.

[0046] The conveying device 2 includes a conveyor belt having a mesh structure with a diameter smaller than the size of the tobacco leaves. The mesh structure of the conveyor belt can not only convey the tobacco leaves and prevent them from falling, but also transfer heat or water vapor to the tobacco leaves through the mesh.

[0047] Tobacco leaves contain aroma-causing components such as ketones, alcohols, aldehydes, lipids, acids, and phenols.

[0048] The test showed that before redrying, the aroma component content in the tobacco leaves was 51.09 ug / g. When the dehumidification and aroma preservation device 4 was not installed on the drying device 1, the aroma component content in the tobacco leaves after curing was 40.13 ug / g. After the dehumidification and aroma preservation device 4 was added to the drying device 1, the aroma component content in the tobacco leaves after curing under the same conditions was 46.56 ug / g. This reduced the loss of aroma components and allowed the tobacco leaves to retain their original aroma. Example 2: A tobacco leaf moisture removal and aroma preservation process, characterized by comprising the following steps: Step S101, controlling the temperature and humidity in the drying area and the rehumidification area; Step S102, detecting the humidity of the tobacco leaves in the drying area and the humidity of the tobacco leaves in the rehumidification area; Step S103, determining whether the humidity of the tobacco leaves in the drying zone is within a first preset humidity range, and determining whether the humidity of the tobacco leaves in the rehumidification zone is within a second preset humidity range; If yes, the temperature and humidity in step S101 are maintained unchanged; if no, the temperature and humidity in the drying area and / or the rehumidification area are adjusted.

[0049] The present invention also proposes a tobacco leaf dehumidification and aroma preservation process, which controls the temperature and humidity of the tobacco leaves in the drying zone and the rehumidification zone to ensure that the tobacco leaves maintain their humidity while dehumidifying, thereby preventing the tobacco leaves from becoming brittle due to excessive water loss and effectively preserving the aroma.

[0050] In step S101, the temperature and humidity of the first drying zone 31, the first cooling zone 32, and the rehumidification zone 33 are controlled. A first temperature detector and a first humidity detector may be installed in the first drying zone 31, a second temperature detector and a second humidity detector may be installed in the first cooling zone 32, and a third temperature detector and a third humidity detector may be installed in the rehumidification zone 33 to effectively monitor the temperature and humidity.

[0051] In step S102, the temperature and humidity of the tobacco leaves in the first drying zone 31, the first cooling zone 32 and the moisture conditioning zone 33 are detected respectively.

[0052] In step S103, it is determined whether the humidity of the tobacco leaves in the first drying zone 31 is within the first preset humidity range, whether the humidity of the tobacco leaves in the first cooling zone 32 is within the third preset humidity range, and whether the humidity of the tobacco leaves in the rehumidification zone is within the second preset humidity range.

[0053] The examples of the implementation methods of this application scheme, and all technical deductions, replacements, improvements, etc. that are identical or similar to the application scheme or made based on this application scheme should be deemed to be within the scope of protection of this patent.

Claims

1. A tobacco leaf dehumidification and aroma preservation device, characterized in that: It includes a drying device, a conveying device and a dehumidification and aroma preservation device. A drying chamber is formed in the drying device. The conveying device is in the drying chamber and is used to convey tobacco leaves. A first partition is provided in the drying chamber to separate the drying chamber into a drying area and a rehumidification area. The dehumidification and aroma preservation device includes a hot and humid air exhaust pipe, a hot air recovery pipe, a water vapor recovery pipe and a water vapor separation chamber; the air inlet end of the hot and humid air exhaust pipe is connected to the drying area, the air outlet end of the hot and humid air exhaust pipe is connected to the water vapor separation chamber, the water inlet end of the water vapor recovery pipe is connected to the water vapor separation chamber, and the water outlet end is connected to the rehumidification area, the air inlet end of the hot air recovery pipe is connected to the water vapor separation chamber 44, and the air outlet end of the hot air recovery pipe is connected to the drying area.

2. The tobacco leaf dehumidification and aroma preservation device according to claim 1, characterized in that A second partition is also provided in the drying chamber, which separates the drying area into a first drying area and a first cooling area. The first drying area, the first cooling area and the rehumidification area are connected in sequence, and the air inlet end of the hot and humid air exhaust pipe is connected to the first drying area and / or the first cooling area.

3. The tobacco leaf dehumidification and aroma preservation device according to claim 2, characterized in that A first through hole is provided on the first partition plate, and a second through hole is provided on the second partition plate. The transmission device enters the cooling zone from the main drying zone through the first through hole, and the transmission device enters the rehumidification zone from the cooling zone through the second through hole.

4. The tobacco leaf dehumidification and aroma preservation device according to claim 1, characterized in that: A filter cavity is provided on the water vapor recovery pipe, and a filter structure is provided in the filter cavity.

5. The tobacco leaf moisture removal and aroma preservation device according to claim 1, characterized in that: A water tank is provided on the water vapor recovery pipe, and the water tank can store the water entering the water vapor recovery pipe.

6. The tobacco leaf moisture removal and aroma preservation device according to claim 5, characterized in that: The water outlet end of the water vapor recovery pipe extends into the rehumidification zone, a water outlet is provided at the water outlet end of the water vapor recovery pipe, an atomizing nozzle is provided at the water outlet, and the atomizing nozzle faces the transmission device.

7. The tobacco leaf dehumidification and aroma preservation device according to claim 6, characterized in that: A pressure pump is provided on the water vapor recovery pipe, and the pressure pump is located between the water tank and the water outlet of the water vapor recovery pipe.

8. The tobacco leaf moisture removal and aroma preservation device according to claim 1, characterized in that: An air impurity removal filter chamber is provided on the hot air recovery pipe.

9. The tobacco leaf dehumidification and aroma preservation device according to claim 1, characterized in that: The air outlet end of the hot air recovery pipe extends into the drying area, and a heat sink and a fan are also provided at the air outlet end of the hot air recovery pipe.

10. A tobacco leaf moisture removal and aroma preservation process, characterized in that: The following steps are included: Step S101, controlling the temperature and humidity in the drying area and the rehumidification area; Step S102, detecting the humidity of the tobacco leaves in the drying area and the humidity of the tobacco leaves in the rehumidification area; Step S103, determining whether the humidity of the tobacco leaves in the drying zone is within a first preset humidity range, and determining whether the humidity of the tobacco leaves in the rehumidification zone is within a second preset humidity range; If yes, the temperature and humidity in step S101 are maintained unchanged; if no, the temperature and humidity in the drying area and / or the rehumidification area are adjusted.

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