Tobacco leaf storage alcoholization regulation and control method

Abstract

The invention discloses a tobacco storage alcoholization regulation and control method, which comprises the following steps of: dynamically regulating and controlling alcoholization according to cigarette product requirements and tobacco storage characteristics in a tobacco alcoholization process, controlling the quality dynamic state of tobacco in a warehouse, improving the tobacco alcoholization quality and the homogenization level, and keeping the stability of cigarette products. Therefore, the contradiction between the tobacco stock structure and use is effectively solved. Specifically, a three-stage alcoholization process is adopted for tobacco leaf raw materials and comprises a high-temperature quality improvement stage, a natural alcoholization homogenization stage and a low-temperature quality guarantee stage. And the tobacco leaves are stored by combining a classification, database division, layering and zoning'four-division 'method, tobacco leaf archives are established, and differentiated maintenance is performed, so that the tobacco leaf alcoholization quality can be effectively improved, the optimal alcoholization interval can be prolonged, and the formula availability can be improved. According to the method, storage equipment does not need to be added, the alcoholization quality is regulated and controlled according to the temperature and humidity conditions of different environments, and classified strategy application and targeted regulation and control are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of tobacco leaf aging regulation and control, and in particular to a tobacco leaf storage aging regulation and control method. Background Art

[0002] Tobacco is the main raw material of the cigarette industry. The storage period in the warehouse is between 12 and 36 months. Taking the northern environment of Henan Province as an example, the temperature and humidity are low from November to May of the following year, with a relative humidity of about 30-40%. At this time, the moisture content of tobacco leaves is generally 9-10%, resulting in the basic lack of alcoholization of the stored tobacco raw materials or slow alcoholization. In addition, the relative humidity and temperature differences between warehouses are also obvious throughout the year: humid in summer and dry in winter, which will also cause the alcoholization rate to be high and low, and then unstable when using different leaf group formulas in different seasons, which will inevitably affect the stability of the smoking quality of finished cigarettes. In addition, due to the low moisture content of tobacco raw materials, warehouse operations are prone to tobacco leaf crushing during transfer, transportation, outbound inspection, and weighing, affecting the quality of the finished products. The contradiction between inventory structure and use has always been the main problem of tobacco raw material inventory control in the industry. Summary of the invention

[0003] In view of the above, the present invention aims to provide a method for regulating tobacco storage aging to solve the above-mentioned technical problems.

[0004] The technical solution adopted by the present invention is as follows:

[0005] The present invention provides a method for regulating and controlling tobacco storage aging, which comprises:

[0006] According to the established tobacco aging rules, a three-stage dynamic aging process is divided, including: high-temperature aging and quality improvement stage, natural aging and homogenization stage, and low-temperature aging and quality preservation stage;

[0007] Under the premise of the three-stage alcoholization process, a four-stage storage alcoholization method is set up, including: classifying and storing tobacco leaves according to the alcoholization characteristics of tobacco leaves and the length of the alcoholization cycle; storing tobacco leaves in different warehouses according to the warehouse type and warehouse building structure; storing tobacco leaves in layers according to the average temperature and humidity of different layers of the warehouse; using a limited environment control mechanism to store tobacco leaves in different zones according to preset areas;

[0008] Combining the three-stage aging process and the four-part storage aging, the aging process is dynamically regulated based on the storage temperature and humidity conditions, including: differentiated aging in different locations, aging for moisture retention during autumn and winter, rapid quality improvement aging, color and aroma preservation aging, homogeneous aging and quality preservation aging.

[0009] In at least one possible implementation, the off-site differential aging includes: utilizing the differences in climate, temperature and humidity in different regions to process, store and age the tobacco raw materials off-site; and transferring the raw materials after the aging meets the established requirements.

[0010] In at least one possible implementation, the autumn and winter warming and moisture retention aging includes: covering the tobacco raw materials used in the leaf group formula with a film, and determining the time nodes for sealing the raw materials and removing the film for natural storage and maintenance through seasonal changes in temperature and humidity inside and outside the warehouse, the temperature difference between day and night, the moisture absorption and dissipation state of the raw materials, and the core temperature.

[0011] In at least one possible implementation, tobacco leaf characteristics and aging cycles of different regions are determined according to tobacco leaf aging characteristics classification, and the rapid quality improvement aging or the color and aroma preservation aging is selected according to different tobacco leaf characteristics and aging cycles.

[0012] In at least one possible implementation, the homogenization aging includes: if the preset tobacco raw material does not enter the formula after the first predetermined aging time, homogenization aging is performed in a medium temperature and medium humidity zone.

[0013] In at least one possible implementation, the quality-preserving aging includes: after aging for a second predetermined period of time, transferring the tobacco leaf raw material whose aging quality reaches a predetermined quality standard into a low-temperature and / or low-oxygen environment for storage.

[0014] In at least one possible implementation, the three-stage dynamic aging process is divided according to the established tobacco aging rules, including: determining the aging cycle based on the influence of temperature and humidity conditions on the aging quality of tobacco raw materials, and dividing the aging process into: a high-temperature quality improvement stage in the early stage of aging, a natural aging homogenization stage, and a low-temperature delayed shelf life stage in the late stage of aging.

[0015] Compared with the prior art, the main design concept of the present invention is to dynamically regulate the alcoholization according to the demand for cigarette products and the storage characteristics of tobacco leaves during the alcoholization process of tobacco leaves, control the quality dynamics of tobacco leaves in the warehouse, improve the alcoholization quality and homogenization level of tobacco leaves, maintain the stability of cigarette products, and effectively resolve the contradiction between the inventory structure and use of tobacco leaves. Specifically, a three-stage alcoholization process is adopted for tobacco raw materials: high-temperature quality improvement stage, natural alcoholization homogenization stage, and cave low-temperature storage stage. It has been verified that the sensory quality score can be improved by at least 0.8 points, and the optimal alcoholization interval can be extended by more than 12 months; and combined with the "four-division" method of classification, storage, stratification, and zoning of tobacco leaves, the establishment of tobacco leaf archives and differentiated maintenance can effectively improve the alcoholization quality of tobacco leaves, extend the optimal alcoholization interval, and improve the availability of formulas. The present invention does not need to add storage equipment, and regulates the alcoholization quality according to the temperature and humidity conditions of different environments, realizing classified measures and targeted regulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be further described below with reference to the accompanying drawings, in which:

[0017] Figure 1 A schematic diagram of a tobacco storage aging control method provided by an embodiment of the present invention;

[0018] Figure 2 A schematic diagram of a three-stage tobacco leaf aging curve provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0019] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be interpreted as limiting the present invention.

[0020] Tobacco leaf aging is a key link in achieving tobacco leaf quality preservation and quality improvement. Within a certain aging cycle, through precise regulation and lean management, it is possible to further broaden the scope of application of raw materials, enhance the use value of raw materials, effectively resolve the structural contradiction between raw material supply and demand, and provide strong support for brand development.

[0021] Therefore, the present invention proposes an embodiment of a method for regulating and controlling tobacco storage aging. Specifically, Figure 1 shown, including:

[0022] Step S1, according to the established tobacco leaf aging rules, a three-stage dynamic aging process is divided, including: a high-temperature aging and quality improvement stage, a natural aging and homogenization stage, and a low-temperature preservation stage; it should be pointed out here that the degree terms such as high temperature, low temperature, medium temperature and medium humidity involved in the present invention do not cause any comprehension differences and implementation obstacles for those skilled in the art, and can be determined accordingly based on the technical knowledge and experience in this field, and the present invention will not elaborate or limit this.

[0023] Specifically, it can include two aspects. First, based on the influence of temperature and humidity aging conditions on the aging quality changes of tobacco raw materials, the aging cycle is determined; second, the aging process is specifically divided into the high-temperature quality improvement stage in the early stage of aging, the natural homogenization aging stage in the medium temperature and medium humidity zone, and the low-temperature preservation stage in the later cave.

[0024] Regarding the first aspect, the aging law of tobacco leaves, that is, the influence of temperature and humidity conditions on the aging law, specifically involves:

[0025] (1) As the aging time of tobacco leaves progresses, the aging quality of tobacco leaves shows a pattern of first rising and then falling. The ambient temperature of tobacco leaves has a significant impact on the speed and quality of tobacco leaves aging, and is an important technical condition for tobacco leaves aging. The higher the ambient air temperature, the more drastic the biochemical changes in the tobacco leaves, and the faster the aging speed; the lower the temperature, the slower the biochemical changes in the tobacco leaves, and the slower the aging speed. However, too high or too low a temperature is not conducive to improving the quality of tobacco leaves. When the temperature is too high (above 35°C), the aging speed is fast, but the quality of the tobacco leaves after aging is poor; when the aging temperature is low (below 15°C), the aging speed is too slow, and it is difficult to fully form the excellent quality of tobacco leaves. Under normal conditions of tobacco leaf moisture content, the suitable temperature for uniform aging of tobacco leaves is 20-30°C.

[0026] (2) The relative humidity of the environment has a great influence on the quality of tobacco leaf aging, which mainly affects the aging process and quality of tobacco leaves by affecting the moisture content of tobacco leaves. When the temperature is between 20℃ and 30℃ and the relative humidity is between 55% and 65%, the appearance quality of tobacco leaves is better and it is more conducive to improving the taste of tobacco leaves. Too high or too low relative humidity will have an adverse effect on the aging quality of tobacco leaves. When stored in a high humidity environment with a relative humidity of more than 70%, the aging speed of tobacco leaves is too fast, the aging cycle is short, the aging tobacco leaves have a darker luster and poorer aroma, and there is even a risk of heating and mildew. When stored in a dry environment with a relative humidity of less than 55%, the moisture content of tobacco leaves is low and they are easy to break, which is not conducive to the natural aging of tobacco leaves.

[0027] Regarding the second aspect, combined with Figure 2 It can be seen from the illustrated embodiment that the three-stage alcoholization process of the tobacco storage alcoholization control method mainly includes: the "three-stage" alcoholization process is to establish a high-temperature zone in the first stage, including warm warehouses, solar warehouses, etc., alcoholization and quality improvement stage, from storage to the 12th month to the 15th month of alcoholization; the second stage is the natural alcoholization and homogenization stage in the medium-temperature zone, from the 15th month to the 24th month of alcoholization; the third stage is the alcoholization and quality preservation stage in the low-temperature zone (cave warehouse), from the 24th month to the end of tobacco application. Quality improvement accelerates the alcoholization process, and the optimal alcoholization range can be reached more than 3 months in advance; homogenization improves the uniformity and consistency of alcoholization quality, and improves the highest score of sensory quality by more than 0.8 points; quality preservation extends the optimal alcoholization range, and the optimal alcoholization range is extended by more than 12 months.

[0028] This embodiment has been promoted and applied in the tobacco storage link in the industry. A total of 320,000 dan of tobacco leaves have been cured using this technical solution, which has effectively improved the aging quality of tobacco leaves and extended the optimal aging period of stored tobacco leaves.

[0029] 1. For tobacco strips stored for more than 30 months, the temperature in the warehouse should be lowered in the late stage of aging (after 24 months) to slow down the aging rate: (1) Warehouses with automatic and manual temperature and humidity control: Use air conditioning to lower the temperature in the warehouse to ensure that the temperature in summer is not higher than 30°C; (2) Warehouses with natural temperature and humidity control: Move the tobacco strips to a floor with a lower temperature and ventilate in the morning to lower the temperature in the warehouse; (3) In autumn when the outside temperature drops rapidly (the temperature inside the warehouse is higher than outside), perform reasonable ventilation.

[0030] 2. For tobacco strips stored within 24 months, a temperature and humidity management mode of increasing the temperature inside the warehouse should be adopted. Such tobacco strips should be stored on the top floor or the second top floor with higher temperature, and ventilation should be carried out when the temperature outside the warehouse is higher than the temperature inside the warehouse.

[0031] 3. For tobacco strips stored for 24 to 30 months, a temperature and humidity management mode of increasing the temperature should be adopted in the early stage of aging (within 18 months). In the later stage of aging (after 24 months), the temperature in the warehouse should be lowered to slow down the aging speed and ensure the stable aging quality of the tobacco strips.

[0032] Continuing from the above, step S2, under the premise of the three-stage alcoholization process, four-stage storage alcoholization is carried out, including: classifying and storing tobacco leaves according to the alcoholization characteristics of tobacco leaves and the length of alcoholization cycle; storing tobacco leaves in different warehouses according to the warehouse type and warehouse building structure; storing tobacco leaves in different layers according to the average temperature and humidity of different layers of the warehouse; adopting a limited environment control mechanism to store tobacco leaves in different zones according to preset areas;

[0033] To elaborate, (1) tobacco is classified according to the characteristics of the tobacco aging cycle. For example, tobacco leaves from Northeast China and Henan have a longer aging cycle, while tobacco leaves from Fujian, Jiangxi, and Hunan have a short aging cycle. Tobacco leaves from Yunnan, Guizhou, Sichuan, and other places have a medium aging cycle. (2) Separate warehouse aging is carried out according to warehouse type and building structure, including building warehouses, single-story brick-concrete structure warehouses, single-story light steel structure warehouses, and cave warehouses. (3) Layered aging is carried out according to the average temperature and humidity of the warehouses. The temperature and humidity environment in the building warehouse is greatly affected by the local climatic conditions. There are differences in sealing and insulation between different types of warehouses. They are divided into high-temperature high-rise warehouses and medium-temperature warehouses. Generally, the first floor is used as a low-temperature layer. (4) Zoned aging is to divide the tobacco leaves on the same floor into zones according to the use direction, quality characteristics, aging progress, and product demand of the tobacco leaves. Micro-environmental control technology is used to set up a type of tobacco raw material warehouse, etc., to carry out exclusive storage areas and implement differentiated management.

[0034] Regarding the specific four-point method in actual operation, please refer to the following introduction:

[0035] Classification: Tobacco leaves are classified and stored according to their aging characteristics and the length of their aging cycles. The aging characteristics of tobacco leaves are formed due to the influence of the ecological conditions of the production areas. According to the production areas, they can be divided into Yunnan tobacco leaf warehouses, Henan tobacco leaf warehouses, Guizhou tobacco leaf warehouses, etc.; according to the length of the aging cycle, they can be divided into: tobacco leaf warehouses with longer aging cycles, medium-cycle aging tobacco leaf warehouses, and short-cycle aging tobacco leaf warehouses. Special warehouses with the same aging cycle are established by classification;

[0036] Sub-warehouses: Tobacco leaves are stored in separate warehouses according to warehouse types and warehouse building structures. They are stored in different places according to the aging locations. The natural ecological resources of temperature and humidity in different places are fully utilized to store tobacco leaves in different places. After aging for a certain period of time, they are transferred to local storage warehouses. According to the warehouse types, they are divided into natural aging warehouses, solar energy warehouses, cave warehouses, gas conditioning warehouses, etc.; according to the building structures, they are divided into building warehouses, single-story brick-concrete structure warehouses, single-story light steel structure warehouses, etc.

[0037] Layering: The warehouses are divided into high-temperature high-rise warehouses, medium-temperature warehouses, and the first floor or cave warehouse as the low-temperature layer according to the average temperature and humidity of the warehouse;

[0038] Zoning: adopt limited environment control mechanism to store tobacco leaves in preset areas; zoning aging adopts micro-environment control technology to set up exclusive storage areas and implement differentiated management. In autumn and winter, the northern tobacco aging warehouse uses film covering to increase temperature and moisture for aging; high temperature areas of warehouses or solar energy warehouses can be used for rapid quality improvement aging; low temperature warehouses or cave warehouses can be used for color and aroma aging and quality aging; natural aging warehouses can be used for homogenous aging.

[0039] Step S3, combining the three-stage aging process and the four-part storage aging process, dynamically regulating the aging process based on the storage temperature and humidity conditions, including: different regional aging, warming and moisturizing aging in autumn and winter, rapid quality improvement aging, color and aroma preservation aging, homogenization aging and quality preservation aging.

[0040] (1) Regarding the off-site differential aging, in actual operation, you can refer to the following: for example, taking advantage of the fact that the winter temperature in Yunnan is higher than that in Henan, the tobacco raw materials from Henan, which is located relatively in the north, can be aged in Yunnan at high temperatures. Of course, a better implementation method would be to make full use of the differences in climate, temperature and humidity between the north and the south, process the tobacco raw materials purchased from the south on-site, store them on-site, and use the local temperature, humidity, climate and other natural resources for off-site aging, and transfer them to another warehouse after aging for a predetermined period of time.

[0041] (2) Regarding the warming and moisturizing aging in autumn and winter, in actual operation, you can refer to: after the autumn fumigation and curing, the tobacco raw materials used in the leaf group formula are covered with a film, and the time nodes of the raw material film sealing and the film removal for natural storage and curing are determined by controlling the temperature and humidity changes in the seasonal warehouse environment, the temperature difference between day and night, the moisture absorption and dissipation state of the raw materials, and the core temperature, so that the original retained moisture is not dissipated. It has been verified that the moisture content of tobacco leaves can be maintained at about 12%, and the loss and crushing of raw materials in the loading and unloading and transportation links are significantly reduced, thereby achieving a long-term maintenance mode of natural aging, and at the same time, the tobacco raw materials are aging under more suitable moisture conditions, which is conducive to improving the aging quality of raw materials. The application of the film covering process moisturizing and moisturizing technology mentioned in this embodiment has a good effect on stabilizing the moisture content of tobacco leaves in stock in autumn and winter, and plays a positive role in maintaining the stability of tobacco aging quality and reducing tobacco leaf crushing losses.

[0042] (3) Regarding rapid quality improvement and color and aroma preservation, the following can be done:

[0043] The rapid physical aging can specifically refer to rapid quality aging in high-temperature zones. For example, according to the classification of tobacco aging characteristics, tobacco leaves in Northeast China and Henan have a long aging cycle and are difficult to aging. In the first stage of the "three-stage" aging (high-temperature aging and quality improvement stage), rapid quality aging in high-temperature zones is adopted. The high-temperature zones mentioned here include: warm warehouses, high floors of building warehouses, and solar warehouse lights; that is, for raw materials urgently needed for cigarette formulations, the aging method of using high-temperature warehouse aging can achieve rapid aging and improve tobacco quality.

[0044] The color-preserving and aroma-preserving aging can specifically refer to the color-preserving and aroma-preserving aging in the low-temperature zone. For example, according to the classification of tobacco leaf aging characteristics, tobacco leaves in Fujian, Jiangxi, Hunan and other regions are easy to change color and carbonize, so the aging cycle is short and it is easier to reach the aging state. Therefore, the color-preserving and aroma-preserving aging in the low-temperature zone is adopted, which is not limited to the aging on the first floor of a building warehouse or a cave warehouse.

[0045] (4) Regarding homogenous aging, you can refer to the following in actual operation: For example, if high-grade high-quality raw materials have not been included in the formula after aging for 15 months, homogenous aging in the medium-temperature and medium-humidity zone should be adopted to maintain aging in the medium-temperature floor of the building.

[0046] (5) Regarding quality preservation and aging, it can specifically refer to low-temperature quality preservation and delayed aging. For example, in the late stage of aging, the tobacco raw materials can be stored in low-temperature caves, air-conditioned warehouses, etc. Specifically, after aging for 15 to 24 months, the aging quality has reached the best quality state. In order to prevent the risk of excessive aging and quality decline, they are transferred to caves / air-conditioned warehouses for low-temperature quality preservation or low-oxygen conditioning quality preservation.

[0047] In summary, during the tobacco aging process, the aging is dynamically regulated according to the demand for cigarette products and the storage characteristics of tobacco leaves, the quality of tobacco leaves in the warehouse is controlled, the aging quality and homogenization level of tobacco leaves are improved, and the stability of cigarette products is maintained, thereby effectively resolving the contradiction between the inventory structure and use of tobacco leaves. Specifically, a three-stage aging process is adopted for tobacco raw materials: high-temperature quality improvement stage, natural aging homogenization stage, and cave low-temperature storage stage. It has been proven that the sensory quality score can be improved by at least 0.8 points, and the optimal aging interval can be extended by more than 12 months; and combined with the "four-division" method of classification, storage, stratification, and zoning of tobacco leaves, the establishment of tobacco leaf archives and differentiated maintenance can effectively improve the aging quality of tobacco leaves, extend the optimal aging interval, and improve the availability of formulas. The present invention does not need to increase storage equipment, and regulates the aging quality according to the temperature and humidity conditions of different environments, realizing classified measures and targeted regulation.

[0048] If the expressions expressing orientation are mentioned in the embodiments of the present invention, they are relative concepts based on the embodiments. In addition, "at least one" means one or more, and "plurality" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent the existence of A alone, the existence of A and B at the same time, and the existence of B alone. Among them, A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in 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 be represented by: a, b, c, a and b, a and c, b and c, or a and b and c, wherein a, b, c can be single or multiple.

[0049] The above describes in detail the structure, features and effects of the present invention based on the embodiments shown in the drawings, but the above is only a preferred embodiment 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 into a variety of equivalent schemes by those skilled in the art without departing from or changing the design ideas and technical effects of the present invention; therefore, the present invention is not limited to the scope of implementation shown in the drawings, and all changes made in accordance with the concept of the present invention, or modifications to equivalent embodiments with equivalent changes, which still do not exceed the spirit covered by the specification and drawings, should be within the protection scope of the present invention.

Claims

1. A method for regulating and controlling tobacco storage aging, characterized in that: include: According to the established tobacco aging rules, a three-stage dynamic aging process is divided, including: high-temperature aging and quality improvement stage, natural aging and homogenization stage, and low-temperature aging and quality preservation stage; Under the premise of the three-stage alcoholization process, a four-stage storage alcoholization method is set up, including: classifying and storing tobacco leaves according to the alcoholization characteristics of tobacco leaves and the length of the alcoholization cycle; storing tobacco leaves in different warehouses according to the warehouse type and warehouse building structure; storing tobacco leaves in layers according to the average temperature and humidity of different layers of the warehouse; using a limited environment control mechanism to store tobacco leaves in different zones according to preset areas; Combining the three-stage aging process and the four-part storage aging, the aging process is dynamically regulated based on the storage temperature and humidity conditions, including: differentiated aging in different locations, aging for moisture retention during autumn and winter, rapid quality improvement aging, color and aroma preservation aging, homogeneous aging and quality preservation aging.

2. The tobacco storage aging control method according to claim 1, characterized in that: The off-site differential aging includes: utilizing the differences in climate, temperature and humidity in different regions to process, store and aging the tobacco raw materials off-site; and transferring them after the aging meets the established requirements.

3. The method for regulating and controlling tobacco storage aging according to claim 1, characterized in that: The autumn and winter warming and moisturizing aging process includes: covering the tobacco raw materials used in the leaf group formula with a film, and determining the time nodes for sealing the raw materials and removing the film for natural storage and maintenance through seasonal changes in temperature and humidity inside and outside the warehouse, the temperature difference between day and night, the moisture absorption and release state of the raw materials, and the core temperature.

4. The method for regulating and controlling tobacco storage aging according to claim 1, characterized in that: The tobacco characteristics and aging cycles of different regions are determined according to the classification of tobacco aging characteristics, and the rapid quality improvement aging or the color and aroma preservation aging is selected according to different tobacco characteristics and aging cycles.

5. The method for regulating and controlling tobacco storage aging according to claim 1, characterized in that: The homogenization alcoholization includes: if the preset tobacco raw material does not enter the formula after the first predetermined alcoholization time, homogenization alcoholization is performed in a medium temperature and medium humidity zone.

6. The method for regulating and controlling tobacco storage aging according to claim 1, characterized in that: The quality-preserving aging includes: after the aging for a second predetermined period of time, transferring the tobacco raw materials whose aging quality reaches a predetermined quality standard into a low-temperature and / or low-oxygen environment for storage.

7. The method for regulating and controlling tobacco storage and aging according to any one of claims 1 to 6, characterized in that: According to the established tobacco aging rules, a three-stage dynamic aging process is divided, including: determining the aging cycle based on the influence of temperature and humidity conditions on the aging quality of tobacco raw materials, and dividing the aging process into: a high-temperature quality improvement stage in the early stage of aging, a natural aging homogenization stage, and a low-temperature delayed shelf life stage in the late stage of aging.

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