A tobacco shred cooling method, system and tobacco shred preparation production line

Abstract

The present invention discloses a shredded tobacco cooling method, system and shredded tobacco preparation production line, the method comprising: step S1: conveying the shredded tobacco to be processed after the shredded tobacco has been expanded and dried to a shredded tobacco storage device for storage, wherein the shredded tobacco storage device has a constant temperature and humidity storage environment; step S2: when the storage time of the shredded tobacco to be processed in the shredded tobacco storage device reaches a preset time threshold, conveying the shredded tobacco to be processed after the storage treatment to a shredded tobacco cooling device for cooling, and conveying the shredded tobacco to be processed after the cooling treatment to a blending and flavoring device for processing to complete the preparation of shredded tobacco. The shredded tobacco cooling method of the present invention adopts a method of naturally cooling the shredded tobacco after the shredded tobacco has been expanded and dried in a constant temperature and humidity area and then cooling the shredded tobacco, thereby achieving the advantages of maintaining a high efficiency in shredded tobacco cooling and stem removal while reducing the amount of water loss of the shredded tobacco during the shredded tobacco cooling process and improving the moisture uniformity of the shredded tobacco.

Description

Technical Field

[0001] The present invention relates to the technical field of cigarette processing, and more particularly to a tobacco shred cooling method and system and a tobacco shred preparation production line. Background Art

[0002] The cooling process of the cut tobacco is an important process in the cigarette manufacturing process. Figure 1 As shown, the leaf cooling process is arranged after the leaf expansion and drying process. Its process task is mainly to improve the curl and filling value of the tobacco, and at the same time remove the tobacco dust, stems and wet tobacco in the tobacco to improve the quality of the tobacco.

[0003] In the cigarette production process, tobacco cuts are generally cooled in two ways. One is "on-site air separation", that is, the tobacco cuts enter the air separation bin of the on-site sorting equipment through a conveying vibration trough. Under the action of the horizontal initial velocity and the rising airflow, the tobacco cuts move forward in a parabolic direction. In this process, the heavier stems and sticks in the tobacco cuts fall off and are removed in advance, and the lighter tobacco ends are sucked away by the dust removal air; the other method is "flow cooling", that is, the dried tobacco cuts are thinned by the conveying equipment and sent to the VAS cooling bed. Under the action of the air separation airflow and the high-frequency vibration of the cooling bed trough, the thin layer of tobacco cuts is suspended and transported forward. The heavier stems and sticks in the tobacco cuts are separated from the tobacco cuts and transported by the screw conveyor for secondary separation. The dust and lighter tobacco cuts are carried by the airflow to the dust separator, and the tobacco cuts are separated from the dust by the screen cylinder. The tobacco cuts are recovered through the air lock device, and the dust is taken away by the dust removal air into the dust removal system. The above two methods are the mainstream tobacco leaf cooling methods in the cigarette production process. However, in actual production, the tobacco leaf cooling process, whether implemented by the "in-situ air separation" method or the "flow cooling (VAS)" method, has certain defects. When the "in-situ air separation" method is used for tobacco leaf cooling, the amount of water loss during the cooling process is small and the material moisture is more uniform. However, the ability to remove tobacco stems during the cooling process is weak. Using the same leaf group formula and the same incoming material conditions, the amount of stems removed per batch by the "in-situ air separation" method is only 15-20% of that by the "flow cooling (VAS)" method. When the "flow cooling (VAS)" method is used for tobacco leaf cooling, the tobacco leaf loses more water during the cooling process. The water loss of tobacco leaf before and after cooling by the "flow cooling (VAS)" method increases by 0.5-1.0% compared with the "in-situ air separation" method. At the same time, the moisture difference between the left, middle, and right sides of the tobacco leaf at the cooling outlet of the "flow cooling" method is about 0.5%, and there is a situation where the tobacco leaf loses a lot of water and has poor uniformity after cooling.

[0004] Therefore, there is an urgent need to develop a tobacco shred cooling method, system and tobacco shred preparation production line to efficiently solve one or more of the above-mentioned problems. Summary of the Invention

[0005] An object of the present invention is to provide a new technical solution for a tobacco shred cooling method, system and tobacco shred preparation production line to solve the problems in the above-mentioned background technology.

[0006] According to a first aspect of the present invention, a leaf shred cooling method is provided, wherein tobacco leaves are sequentially subjected to slicing, loosening and rehydration, tobacco sheet addition and leaf shredding to obtain leaf shreds to be processed, and then the leaf shreds to be processed are subjected to leaf shred expansion and drying treatment by an expansion and drying device.

[0007] The method comprises:

[0008] Step S1: transporting the to-be-processed leaf strips after the leaf strips have been expanded and dried to a leaf strip storage device for storage, wherein the leaf strip storage device has a storage environment with a constant temperature and humidity;

[0009] Step S2: When the storage time of the shredded tobacco to be processed in the shredded tobacco storage device reaches a preset time threshold, the shredded tobacco to be processed after storage treatment is transported to the shredded tobacco cooling device for cooling treatment, and the shredded tobacco to be processed after cooling treatment is sent to the blending and flavoring device for processing to complete the preparation of shredded tobacco.

[0010] Optionally, in step S1, the ambient temperature in the shredded leaf storage device is 26°C.

[0011] Optionally, in step S1, the ambient humidity in the shredded leaf storage device is 65%.

[0012] Optionally, the preset time threshold value ranges from 2 hours to 4 hours.

[0013] Optionally, before the leaf shreds are expanded and dried, the moisture ratio value at the leaf shreds drying outlet and the temperature value of the drying cylinder wall of the expansion and drying equipment need to be adjusted.

[0014] Optionally, the moisture content of the shredded leaves at the drying outlet is adjusted to 14.0%.

[0015] Optionally, the drying cylinder wall temperature is adjusted to 143°C.

[0016] According to a second aspect of the present invention, a tobacco leaf cooling system is provided, wherein tobacco leaves are sequentially processed through a slicing device, a loosening and rehydration device, a tobacco leaf feeding device, and a leaf cutting device to obtain tobacco leaf shreds to be processed, and then the tobacco leaf shreds are expanded and dried by an expansion and drying device.

[0017] The system includes: a leaf shred storage device and a leaf shred cooling device connected to the leaf shred storage device; the leaf shred storage device has a constant temperature and humidity storage environment, and the leaf shred storage device is used to store the leaf shreds to be processed after the leaf shreds have undergone expansion and drying treatments; the leaf shred cooling device is used to cool the leaf shreds to be processed after storage treatment when the storage time of the leaf shreds to be processed in the leaf shred storage device reaches a preset time threshold, and send the cooled leaf shreds to be processed to a blending and flavoring device for processing to complete the preparation of tobacco shreds.

[0018] Optionally, the to-be-processed leaf strips that have undergone leaf strip expansion and drying treatment pass through a leaf strip drying outlet vibration trough and are then transported to the leaf strip storage device via a conveyor belt.

[0019] According to a third aspect of the present invention, there is provided a tobacco shred preparation production line comprising the shredded tobacco cooling system as described in the second aspect of the present invention.

[0020] According to an embodiment disclosed in the present invention, the following beneficial effects are achieved:

[0021] A leaf cutting cooling method of the present invention adopts a method of naturally cooling the leaf cuttings after the leaf cuttings have been expanded and dried in a constant temperature and humidity area and then cooling the leaf cuttings, thereby achieving the advantages of maintaining a high efficiency in cooling the leaf cuttings and removing stems while reducing the water loss of the tobacco leaves during the leaf cutting cooling process and improving the moisture uniformity of the tobacco cuttings.

[0022] Further features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0024] Figure 1 This is a process flow chart of the tobacco making process in the prior art;

[0025] Figure 2 Schematic diagram of a process for cooling a blade according to an embodiment;

[0026] Figure 3 This is a flow chart of the process optimization of the tobacco cutting part in the tobacco processing according to a tobacco cutting cooling method provided in an embodiment;

[0027] Figure 4 Schematic diagram of the structure of a blade cooling system provided according to an embodiment;

[0028] Figure 5The present invention is a structural block diagram of a tobacco production line provided according to an embodiment.

[0029] Description of reference numerals:

[0030] 1- Leaf shred storage equipment; 11- Conveyor belt;

[0031] 2- Blade cooling equipment;

[0032] 3-Expansion and drying equipment; 31-Leaf drying outlet vibration trough;

[0033] 4-Blending and flavoring equipment;

[0034] 5- Leaf cutting equipment;

[0035] 6-Cigarette feeding equipment;

[0036] 7-Loose rehumidification equipment;

[0037] 8- Slicing equipment. DETAILED DESCRIPTION

[0038] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0039] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0040] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0041] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0042] Example 1:

[0043] See also Figure 2 As shown, this embodiment provides a leaf cooling method, wherein tobacco leaves are sequentially sliced, loosened and moistened, tobacco leaves are added and cut into leaves to obtain leaf leaves to be processed, and then the leaf leaves to be processed are expanded and dried by an expansion and drying device.

[0044] The method comprises:

[0045] Step S1: transporting the leaf strips to be processed after the leaf strips have been expanded and dried to a leaf strip storage device for storage, wherein the leaf strip storage device has a storage environment with a constant temperature and humidity;

[0046] Step S2: When the storage time of the tobacco leaves to be processed in the tobacco leaf storage device reaches a preset time threshold, the tobacco leaves to be processed after storage treatment are transported to the tobacco leaf cooling device for cooling treatment, and the tobacco leaves to be processed after cooling treatment are sent to the blending and flavoring equipment for processing to complete the preparation of tobacco leaves.

[0047] For details, see Figure 1 As shown, the leaf shreds cooling process is between the leaf shreds expansion and drying process and the blending and flavoring process in the leaf shreds making process. After the leaf shreds expansion and drying process, the leaf shreds pass through the leaf shreds cooling process and then enter the blending and flavoring process; see Figure 3 As shown, the method proposed in this embodiment optimizes and adjusts the existing process flow, and adjusts the processing flow to the leaf silk expansion and drying, and then enters the leaf silk storage equipment (for example, a leaf silk storage cabinet) in a constant temperature and humidity area for leaf silk storage. The leaf silk storage time = the time when the leaf silk leaves the storage equipment - the time when the entire batch of leaf silk enters the storage equipment. After the leaf silk storage is completed, the leaf silk passes through the leaf silk cooling process.

[0048] When the leaf shreds are cooled using the traditional method (i.e., the leaf shreds are cooled directly after expansion and drying), the temperature of the leaf shreds entering the cooling process is around 45°C, and the moisture content of the leaf shreds is around 15%. Since wind power is required in the leaf shred cooling equipment to keep the leaf shreds in a suspended state and transport them forward, the high-temperature and high-humidity leaf shreds lose moisture rapidly during the cooling process, and the degree of moisture loss varies in different areas of the leaf shreds, resulting in a large drop in moisture content in the outlet leaf shreds and poor moisture uniformity.

[0049] After process optimization and adjustment (i.e. the leaves undergo expansion and drying processes and then enter a constant temperature and humidity area for storage), the leaves are transported to a constant temperature and humidity area for storage. During the storage of the leaves, the temperature of the leaves slowly decreases, and the water evaporates naturally. During the cooling process of the leaves, the rate of water loss is relatively slow, and the moisture uniformity of the leaves is better. After the storage of the leaves is completed, the temperature of the leaves drops to room temperature. Under low temperature conditions, the leaves lose less water during the cooling process, and the moisture uniformity of the exported leaves is better. At the same time, it will not affect the efficiency of removing stems from the leaves by cooling the leaves.

[0050] Preferably, in the shredded leaf cooling method of this embodiment, in step S1, the ambient temperature in the shredded leaf storage device is 26°C.

[0051] It should be noted that the ambient temperature in the leaf shred storage device in this embodiment can also be other temperature values, such as: 20°C, 21°C, 22°C, 23°C, 24°C, 25°C or 27°C, etc., which can be set according to actual production needs and are not listed here one by one.

[0052] Preferably, in the shredded leaf cooling method of this embodiment, in step S1, the ambient humidity in the shredded leaf storage device is 65%.

[0053] It should be noted that the ambient humidity in the leaf storage device in this embodiment can also be other humidity values, such as: 55%, 56%, 57%, 58%, 59%, 60%, 61%, 62%, 63%, 64%, 66% or 67%, which are set according to actual production needs and are not listed here one by one.

[0054] Optionally, the preset time threshold in the blade cooling method of this embodiment ranges from 2 hours to 4 hours. It should be noted that the preset time threshold in this embodiment can be set to 2 hours, 2.5 hours, 3 hours, 3.5 hours, or 4 hours, depending on actual production needs, and will not be listed here one by one.

[0055] Optionally, the leaf shred cooling method of this embodiment requires adjusting the moisture content at the leaf shred drying outlet and the drying drum wall temperature of the expansion and drying equipment before performing the leaf shred expansion and drying process. To improve the cooling effect, the process parameters of the leaf shred expansion and drying process are fine-tuned in this embodiment.

[0056] Preferably, the moisture content of the shredded leaves at the drying outlet in the present embodiment is adjusted to 14.0%. It should be noted that the moisture content of the shredded leaves at the drying outlet in the present embodiment can also be other values, which are set according to actual production needs and are not listed here one by one.

[0057] Preferably, the temperature of the drying drum wall in the leaf shred cooling method of this embodiment is adjusted to 143° C. It should be noted that the moisture ratio of the leaf shred drying outlet in this embodiment can also be other values, which are set according to actual production needs and are not listed here one by one.

[0058] The following is a detailed explanation using a specific example:

[0059] (1) From slicing to shredding, the process flow and processing parameters remain unchanged;

[0060] (2) The leaf expansion and drying process outlet moisture content of the leaf was adjusted from 14.8% to 14.0%, and the drying drum wall temperature was adjusted from 135°C to 143°C. The other parameters of the leaf expansion and drying process remained unchanged;

[0061] (3) After the leaves are dried, they are not directly put into the leaf cooling process as before, but are first put into a constant temperature and humidity area for storage (ambient temperature: 26°C; ambient humidity: 65%), and then put into the leaf cooling process after 2 hours of storage;

[0062] (4) The processing parameters of the leaf cooling process and the blending and flavoring process remain unchanged.

[0063] Using the optimized process flow of this embodiment (referred to as the new processing method), the moisture loss of the leaf silk during the leaf silk cooling process during the expansion and drying of the leaf silk outlet is reduced from the original 1.8% to 1.0%. Compared with the original processing process (old processing method), the moisture loss of the leaf silk during the leaf silk cooling process under the new processing method is reduced by 0.8%. After adopting the new processing method, under the conditions that the moisture content of the leaf silk expansion and drying incoming materials and the moisture content of the leaf silk cooling outlet are the same, due to the reduction in moisture loss during the leaf silk cooling process, more moisture in the leaf silk is dehydrated by high temperature in the leaf silk drying process, and the sensory quality of the cigarette is improved to a certain extent, which is specifically manifested in the richness of the aroma and the increase in the amount of aroma. Under the new processing method, the moisture range of the left, middle and right sides of the leaf silk cooling outlet is reduced from 0.5% to 0.25% (the moisture range is the highest value minus the lowest value), and the moisture uniformity at the outlet is improved. The specific key indicators of the new processing method and the old processing method are compared in Table 1 below:

[0064] Table 1 Comparison of key indicators before and after processing mode adjustment

[0065]

[0066] In summary, the leaf cutting cooling method of the embodiment of the present invention adopts a method of naturally cooling the leaf cuttings after the leaf cuttings have been expanded and dried in a constant temperature and humidity area and then cooling the leaf cuttings, thereby achieving the advantages of maintaining a high efficiency in cooling and removing stems while reducing the water loss of tobacco leaves during the leaf cutting cooling process and improving the moisture uniformity of the tobacco cuttings.

[0067] Example 2:

[0068] See also Figure 4 and Figure 5 As shown, this embodiment provides a tobacco leaf cooling system. The tobacco leaves are sequentially processed by a slicing device 8, a loosening and rehydration device 7, a tobacco leaf feeding device 6, and a leaf cutting device 5 to obtain tobacco leaves to be processed. The tobacco leaves are then expanded and dried by an expansion and drying device 3.

[0069] The system includes: a leaf shred storage device 1, and a leaf shred cooling device 2 connected to the leaf shred storage device 1; wherein the leaf shred storage device 1 has a storage environment with constant temperature and humidity, and the leaf shred storage device 1 is used to store and process the leaf shreds to be processed after the leaf shreds have been expanded and dried; the leaf shred cooling device 2 is used to cool the leaf shreds to be processed after the storage time in the leaf shred storage device 1 reaches a preset time threshold, and send the cooled leaf shreds to be processed to the blending and flavoring device 4 for processing to complete the preparation of tobacco shreds.

[0070] Optionally, in the leaf shred cooling system of this embodiment, the leaf shreds to be processed, after undergoing leaf shred expansion and drying treatment, pass through the leaf shred drying outlet vibration trough 31 and are then transported to the leaf shred storage device 1 via the conveyor belt 11 .

[0071] Preferably, in the shredded blade cooling system of this embodiment, the ambient temperature in the shredded blade storage device 1 is 26°C.

[0072] It should be noted that the ambient temperature in the leaf shred storage device in this embodiment can also be other temperature values, such as: 20°C, 21°C, 22°C, 23°C, 24°C, 25°C or 27°C, etc., which can be set according to actual production needs and are not listed here one by one.

[0073] Preferably, the ambient humidity in the blade shred storage device 1 in the blade shred cooling system of this embodiment is 65%.

[0074] It should be noted that the ambient humidity in the leaf storage device in this embodiment can also be other humidity values, such as: 55%, 56%, 57%, 58%, 59%, 60%, 61%, 62%, 63%, 64%, 66% or 67%, which are set according to actual production needs and are not listed here one by one.

[0075] Optionally, the preset time threshold in the blade cooling system of this embodiment ranges from 2 hours to 4 hours. It should be noted that the preset time threshold in this embodiment can be set to 2 hours, 2.5 hours, 3 hours, 3.5 hours, or 4 hours, depending on actual production needs, and will not be listed here one by one.

[0076] Optionally, the blade cooling system of this embodiment requires adjusting the moisture content at the blade drying outlet and the drying drum wall temperature of the blade expansion and drying equipment before performing the blade expansion and drying process. To improve the cooling effect, the process parameters of the blade expansion and drying process are fine-tuned in this embodiment.

[0077] Preferably, the moisture content of the blade drying outlet in the blade cooling system of this embodiment is adjusted to 14.0%. It should be noted that the moisture content of the blade drying outlet in this embodiment can also be other values, which are set according to actual production needs and are not listed here one by one.

[0078] Preferably, the temperature of the drying drum wall in the blade cooling system of this embodiment is adjusted to 143° C. It should be noted that the moisture ratio of the blade drying outlet in this embodiment can also be other values, which are set according to actual production needs and are not listed here one by one.

[0079] Example 3:

[0080] See also Figure 5 As shown, this embodiment provides a tobacco shred preparation production line, including the shredded tobacco cooling system as described in the above embodiment 2.

[0081] Please note that the technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. The above embodiments only express several implementation methods of the present application. The description is relatively specific and detailed, but it cannot be understood as a limitation on the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, without departing from the concept of this application, several variations and improvements can be made, which all fall within the scope of protection of this application. Therefore, the scope of protection of the patent in this application shall be based on the attached claims.

[0082] Embodiments of the subject matter and functional operations described in this specification may be implemented in the following: digital electronic circuits, tangibly embodied computer software or firmware, computer hardware including the structures disclosed in this specification and their structural equivalents, or a combination of one or more of them. Embodiments of the subject matter described in this specification may be implemented as one or more computer programs, i.e., one or more modules of computer program instructions encoded on a tangible, non-transitory program carrier to be executed by a data processing device or to control the operation of the data processing device. Alternatively or additionally, the program instructions may be encoded on an artificially generated propagation signal, such as a machine-generated electrical, optical, or electromagnetic signal, which is generated to encode information and transmit it to a suitable receiver device for execution by the data processing device. The computer storage medium may be a machine-readable storage device, a machine-readable storage substrate, a random or serial access memory device, or a combination of one or more of them.

[0083] The processes and logic flows described in this specification can be performed by one or more programmable computers executing one or more computer programs to perform the corresponding functions by operating on input data and generating output. The processes and logic flows can also be performed by, and apparatus can be implemented as, special purpose logic circuitry, such as an FPGA (field programmable gate array) or an ASIC (application-specific integrated circuit).

[0084] Computers suitable for executing computer programs include, for example, general-purpose and / or special-purpose microprocessors, or any other type of central processing unit. Typically, the central processing unit will receive instructions and data from a read-only memory and / or random access memory. The basic components of a computer include a central processing unit for implementing or executing instructions and one or more memory devices for storing instructions and data. Typically, a computer will also include one or more mass storage devices for storing data, such as magnetic disks, magneto-optical disks, or optical disks, or the computer will be operably coupled to such mass storage devices to receive data from them or to transmit data to them, or both. However, a computer does not necessarily have such devices. In addition, a computer can be embedded in another device, such as a mobile phone, a personal digital assistant (PDA), a mobile audio or video player, a game console, a global positioning system (GPS) receiver, or a portable storage device such as a universal serial bus (USB) flash drive, to name a few.

[0085] Computer-readable media suitable for storing computer program instructions and data include all forms of non-volatile memory, media, and storage devices, including, for example, semiconductor memory devices (e.g., EPROM, EEPROM, and flash memory devices), magnetic disks (e.g., internal hard disks or removable disks), magneto-optical disks, and CD ROM and DVD-ROM disks. The processor and memory can be supplemented by, or incorporated in, special purpose logic circuitry.

[0086] Although this specification includes many specific implementation details, these should not be interpreted as limiting the scope of any invention or the scope of protection claimed, but are mainly used to describe the features of specific embodiments of specific inventions. Certain features described in multiple embodiments within this specification may also be implemented in combination in a single embodiment. On the other hand, the various features described in a single embodiment may also be implemented separately in multiple embodiments or in any suitable sub-combination. In addition, although features may work in certain combinations as described above and even initially claimed as such, one or more features from the claimed combination may be removed from the combination in some cases, and the claimed combination may point to a sub-combination or a variation of the sub-combination.

[0087] Similarly, although operations are depicted in a particular order in the accompanying drawings, this should not be understood as requiring that these operations be performed in the particular order shown or performed sequentially, or that all illustrated operations be performed to achieve the desired results. In some cases, multitasking and parallel processing may be advantageous. In addition, the separation of various system modules and components in the above-described embodiments should not be understood as requiring such separation in all embodiments, and it should be understood that the described program components and systems can generally be integrated together in a single software product, or packaged into multiple software products.

[0088] Thus, specific embodiments of the subject matter have been described. Other embodiments are within the scope of the following claims. In some cases, the actions recited in the claims can be performed in a different order and still achieve the desired results. Furthermore, the processes depicted in the accompanying drawings do not necessarily require the particular order shown or sequential sequence to achieve the desired results. In some implementations, multitasking and parallel processing may be advantageous.

[0089] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0090] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A blade cooling method, characterized in that: The tobacco leaves are sliced, loosened and moistened, and smoked. After the slices are added and the leaf shreds are cut, the leaf shreds to be processed are obtained, and then the leaf shreds to be processed are expanded and dried by an expansion and drying device. The method comprises: Step S1: transporting the to-be-processed leaf shreds after the leaf shreds expansion and drying process to a leaf shreds storage device for storage, wherein the leaf shreds storage device has a storage environment with a constant temperature and humidity; Step S2: When the storage time of the shredded tobacco to be processed in the shredded tobacco storage device reaches a preset time threshold, the shredded tobacco to be processed after storage treatment is transported to a shredded tobacco cooling device for cooling treatment, and the shredded tobacco to be processed after cooling treatment is transported to a blending and flavoring device for processing to complete the preparation of shredded tobacco; In the step S1, the ambient temperature in the shredded leaf storage device is 26°C; In the step S1, the ambient humidity in the leaf shred storage device is 65%; In step S2, the preset time threshold value ranges from 2h to 4h; Before the leaf shreds are expanded and dried, the moisture ratio at the leaf shreds drying outlet and the temperature of the drying cylinder wall of the expansion and drying equipment need to be adjusted; The moisture content of the dried leaf strips at the outlet is adjusted to 14.0%; The temperature of the drying cylinder wall was adjusted to 143°C.

2. A blade cooling system, characterized in that: The tobacco leaves are processed by slicing equipment, loosening and rehumidification equipment, tobacco sheet feeding equipment and leaf shredding equipment in sequence to obtain shredded leaves to be processed, and then the shredded leaves to be processed are expanded and dried by expansion and drying equipment. The system comprises: a leaf shred storage device, and a leaf shred cooling device connected to the leaf shred storage device; the leaf shred storage device has a constant temperature and humidity storage environment, and the leaf shred storage device is used to store the leaf shreds to be processed after the leaf shreds have been expanded and dried; the leaf shred cooling device is used to cool the leaf shreds to be processed after the storage process when the storage time of the leaf shreds to be processed in the leaf shred storage device reaches a preset time threshold, and send the cooled leaf shreds to be processed to a blending and flavoring device for processing to complete the preparation of shredded tobacco; The ambient temperature in the shredded leaf storage device is 26°C; The ambient humidity in the shredded leaf storage device is 65%; The preset time threshold value ranges from 2h to 4h; Before the leaf shreds are expanded and dried, the moisture ratio at the leaf shreds drying outlet and the temperature of the drying cylinder wall of the expansion and drying equipment need to be adjusted; The moisture content of the dried leaf strips at the outlet is adjusted to 14.0%; The temperature of the drying cylinder wall was adjusted to 143°C.

3. The blade cooling system according to claim 2, characterized in that: After the leaf shreds are expanded and dried, the leaf shreds to be processed pass through the leaf shred drying outlet vibration groove and are transported to the leaf shred storage device via a conveyor belt.

4. A tobacco production line, characterized in that: Comprising the blade cooling system as claimed in claim 2 or 3.

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