Method for improving the use value of warehouse-cured tobacco leaves and application thereof

Abstract

The application provides a method for improving the use value of warehouse-cured tobacco leaves and application thereof, and the method comprises the following steps: (1) vacuum moisture conditioning, leaf conditioning and redrying of the warehouse-cured tobacco leaves to obtain treated tobacco leaves; (2) vacuum moisture conditioning, leaf conditioning, mixing with biological enzyme and alcoholizing of the treated tobacco leaves, and inactivation to obtain inactivated tobacco leaves; (3) loose moisture conditioning, cutting, carbon dioxide impregnation and sublimation of the inactivated tobacco leaves on a CO2 expanded tobacco shred production line to obtain expanded tobacco shreds. The method provided by the application can treat the warehouse-cured tobacco leaves by means of leaf threshing and redrying production line, biological enzyme feeding, inactivation and expanded tobacco shred line processing technology, and the combination of different processing procedures can reduce the unique aroma of the cured tobacco leaves, improve the smoke comfort and the aftertaste in the mouth, and the treated tobacco leaves can be used as a blending material with a small proportion to be blended into the tobacco shred of the flue-cured tobacco type cigarette.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of tobacco processing, and particularly relates to a method for improving the use value of warehouse-cured tobacco leaves and application thereof. BACKGROUND

[0002] Sun-cured tobacco, burley tobacco and oriental tobacco are indispensable tobacco raw materials in mixed cigarettes, but as the demand for mixed cigarettes decreases, the market for mixed cigarettes has decreased significantly, resulting in a certain amount of mixed tobacco raw materials such as sun-cured tobacco, burley tobacco and oriental tobacco accumulated in cigarette enterprises. Sun-cured tobacco has high density, excessive strength, rough smoke, heavy odor, heavy breath odor and poor aftertaste, and cannot be directly used in flue-cured tobacco cigarette leaf formula, resulting in long-term accumulation of sun-cured tobacco raw materials in the warehouse, high warehouse maintenance pressure, occupation of funds and failure to realize the use value of sun-cured tobacco.

[0003] CN106579534A provides a processing method for improving the applicability of burley tobacco in flue-cured tobacco cigarettes, which includes the following steps: (1) placing burley tobacco sheets into a vacuum moisture machine for 20-30 minutes; (2) immersing the burley tobacco in a solution containing 5-8% concentration for 10-15 minutes, the solution containing citric acid, malic acid and lactic acid; (3) sending the immersed burley tobacco into an oven for two-stage baking, and then cutting the tobacco; (4) adding ingredients, adding ingredients to the burley tobacco according to a proportion of 3%, the ingredients containing indole, dihydrodamascenone, fennel oil, fig extract and cocoa; and (5) storing the added tobacco for 2 hours to make the ingredients fully combined with the tobacco. The method has many chemical components during the adding of ingredients, high cost, and still has deficiencies in reducing the odor and irritation of burley tobacco.

[0004] CN111887461A provides a burley tobacco processing method capable of effectively improving the quality of tobacco. The method includes the following steps: drying the tobacco at a constant speed; after the burley tobacco is dried at a constant speed for a certain period of time, the temperature of the hot process air is reduced, the predetermined humidity of the hot process air is maintained, and the tobacco is subjected to first-stage deceleration drying; after the deceleration drying for a period of time, the humidity of the hot process air is reduced again, and the tobacco is subjected to second-stage deceleration drying. However, the method has a high temperature during processing, which can easily cause the tobacco to have a dry head.

[0005] CN112841697A provides a processing method for improving the applicability of sun-cured yellow tobacco formula, comprising the following steps: (1) sun-cured yellow tobacco is sequentially subjected to loose rehydration, primary mixing, feeding, primary leaf storage, baking and boxing treatment on a burley tobacco production line to obtain primary modified tobacco leaf; the feeding liquid contains the following components by weight: honey 25-30 parts, lactic acid 3-5 parts, methyl cyclopentenone acid 4-6 parts, citric acid 5-8 parts, anise acetate 10-15 parts, glucose 25-30 parts, and water 10-15 parts; (2) the primary modified tobacco leaf is sent to a leaf threshing and redrying production line for vacuum rehydration, secondary mixing, leaf conditioning, secondary leaf storage, redrying and packaging treatment to obtain secondary modified tobacco leaf. The invention improves the delicacy of sun-cured yellow tobacco smoke, improves aroma quality, reduces smoke irritation, and improves taste, etc., so that the internal quality of sun-cured yellow tobacco is further improved, the internal chemical composition of sun-cured yellow tobacco is more coordinated, and the formula applicability of sun-cured yellow tobacco can be effectively improved.

[0006] CN111671125A discloses a mixing processing method of sun-cured yellow tobacco, comprising the following steps: pretreating the sun-cured yellow tobacco; mixing the pretreated sun-cured yellow tobacco with other raw tobacco materials to obtain mixed tobacco material; and reprocessing the mixed tobacco material to form a final product. The mixing processing method of sun-cured yellow tobacco of the invention, by means of a leaf threshing and redrying production line, through the combination of different processing procedures, achieves the purposes of reducing the smoke density and peculiar odor of sun-cured yellow tobacco, improving the smoke characteristics and taste characteristics, thereby improving the use value of sun-cured yellow tobacco raw materials, and enabling the treated sun-cured yellow tobacco to be applied in cigarette formulas without reducing the quality of cigarettes.

[0007] However, the above methods cannot completely solve the problems faced by sun-cured yellow tobacco, burley tobacco and tobacco leaf raw materials such as aromatic tobacco due to long-term storage. Therefore, in order to improve the application value of long-aging sun-cured tobacco, a better processing method is needed to reduce the peculiar odor and irritation of long-aging sun-cured tobacco without damaging the practical value of long-aging sun-cured tobacco. SUMMARY

[0008] In view of the deficiencies of the prior art, the purpose of the present invention is to provide a method for improving the use value of in-stock sun-cured tobacco leaves and its application. The method provided by the present invention can process in-stock finished sun-cured tobacco leaves by means of a leaf threshing and redrying production line, biological enzyme feeding, inactivation and expanded tobacco line processing technology, through the combination of different processing procedures, to reduce the peculiar odor of sun-cured tobacco, improve the smoke comfort and mouth aftertaste, and after treatment, it can be used as a small proportion of a blending material to be blended into a flue-cured tobacco type cigarette finished tobacco.

[0009] To achieve the purpose of the invention, the following technical solutions are adopted:

[0010] On the one hand, the present invention provides a method for improving the use value of in-stock sun-cured tobacco leaves, comprising the following steps:

[0011] (1) The in-store air-cured tobacco leaves are vacuum rehydrated, moistened, and redried to obtain treated tobacco leaves;

[0012] (2) The treated tobacco leaves are vacuum rehydrated, moistened, and then mixed with biological enzymes for alcoholization and inactivation to obtain inactivated tobacco leaves;

[0013] (3) The inactivated tobacco leaves are loosened, cut, and carbon dioxide soaked and sublimed on a CO2 expanded tobacco line to obtain expanded tobacco.

[0014] The above method can reduce the unique aroma of air-cured tobacco by combining different processing procedures through the processing of a threshing and redrying line, biological enzyme addition, inactivation, and expanded tobacco line, thereby improving the smoke comfort and aftertaste in the mouth, and the treated tobacco leaves can be used as a blending material to be blended into a small proportion of flue-cured tobacco type cigarette cut tobacco.

[0015] Preferably, the in-store air-cured tobacco leaves include any one or a combination of at least two of sun-cured tobacco, oriental tobacco, or burley tobacco.

[0016] Preferably, the vacuum rehydration in step (1) adopts two cycles, the first cycle has a vacuum degree of 0.8-1.2 kPa and a pressure holding time of 80-120 s, the second cycle has a vacuum degree of 0.8-1.2 kPa and a pressure holding time of 10-20 s, the outlet temperature of the vacuum rehydration is 70-80℃, and the moisture content of the discharged material is 11-13%.

[0017] The first cycle can have a vacuum degree of 0.8 kPa, 0.9 kPa, 1 kPa, 1.1 kPa, or 1.2 kPa, etc., the pressure holding time can be 80 s, 90 s, 100 s, 110 s, or 120 s, etc., the second cycle can have a vacuum degree of 0.8 kPa, 0.9 kPa, 1 kPa, 1.1 kPa, or 1.2 kPa, etc., the pressure holding time can be 10 s, 11 s, 12 s, 13 s, 14 s, 15 s, 16 s, 17 s, 18 s, 19 s, or 20 s, etc., the outlet temperature can be 70℃, 72℃, 74℃, 76℃, 78℃, or 80℃, etc., and the moisture content of the discharged material can be 11%, 11.5%, 12%, 12.5%, or 13%, etc., but is not limited to the above-mentioned values, and other values within the above-mentioned ranges are also applicable.

[0018] Preferably, the moistening in step (1) includes primary moistening and secondary moistening, the outlet temperature of the primary moistening is 40-50℃, and the outlet moisture content is 18-20%; the outlet temperature of the secondary moistening is 50-60℃, and the outlet moisture content is 20-22%.

[0019] In the primary leaf moistening, the outlet temperature can be 40℃, 42℃, 44℃, 46℃, 48℃ or 50℃, etc., and the moisture content can be 18%, 18.5%, 19%, 19.5% or 20%, etc.; in the secondary leaf moistening, the outlet temperature can be 50℃, 52℃, 54℃, 56℃, 58℃ or 60℃, etc., and the outlet moisture content can be 20%, 20.5%, 21%, 21.5% or 22%, etc., but not limited to the above listed values, other values not listed within the above value range are also applicable.

[0020] Preferably, in the re-drying process of step (1), the temperature of the first drying zone is 45-55℃, the temperature of the second drying zone is 55-65℃, the temperature of the third drying zone is 75-85℃, the temperature of the fourth drying zone is 55-65℃, the temperature of the fifth drying zone is 45-55℃, the temperature of the sixth drying zone is 40-50℃, and the cooling treatment is to a temperature of 25-35℃ and a moisture content of 10-11%.

[0021] Preferably, in the re-drying process of step (1), the temperature of the first drying zone is 45-55℃, the temperature of the second drying zone is 55-65℃, the temperature of the third drying zone is 75-85℃, the temperature of the fourth drying zone is 55-65℃, the temperature of the fifth drying zone is 45-55℃, the temperature of the sixth drying zone is 40-50℃, and the cooling treatment is to a temperature of 25-35℃ and a moisture content of 10-11%.

[0022] Preferably, in the vacuum re-drying process of step (2), one cycle is adopted, the outlet temperature is 70-80℃, and the moisture content of the discharged material is 12-13%, wherein the outlet temperature can be 70℃, 72℃, 74℃, 76℃, 78℃ or 80℃, etc., and the moisture content of the discharged material can be 12%, 12.2%, 12.4%, 12.6%, 12.8% or 13%, etc., but not limited to the above listed values, other values not listed within the above value range are also applicable.

[0023] Preferably, in the moistening in step (2), the outlet temperature is 40-50℃, and the outlet moisture is 18-20%, wherein the outlet temperature can be 40℃, 42℃, 44℃, 46℃, 48℃ or 50℃, and the outlet moisture can be 18%, 18.5%, 19%, 19.5% or 20%, but is not limited to the above-mentioned values, and other values not mentioned in the above-mentioned value range are also applicable.

[0024] Preferably, the biological enzyme in step (2) comprises any one or a combination of at least two of complex protease, nicotine-degrading enzyme, pectinase or catalase, preferably a combination of complex protease, nicotine-degrading enzyme, pectinase and catalase.

[0025] The above-mentioned specific biological enzyme combination can effectively reduce harmful smoke and improve smoke comfort and oral aftertaste by using complex protease, nicotine-degrading enzyme, pectinase and catalase in combination.

[0026] Preferably, the biological enzyme in step (2) is added in the form of an enzyme solution, the addition amount of the enzyme solution is 5-10% of the mass of the tobacco leaves, and the mass fraction of the enzyme solution is 8-12%.

[0027] Preferably, in the alcoholization in step (2), the temperature is 43-48℃, the humidity is 75-85%, and the time is 36-48h, wherein the temperature can be 43℃, 44℃, 45℃, 46℃, 47℃ or 48℃, the humidity can be 75%, 77%, 79%, 81%, 83% or 85%, and the time can be 36h, 38h, 40h, 42h, 44h, 46h or 48h, but is not limited to the above-mentioned values, and other values not mentioned in the above-mentioned value range are also applicable.

[0028] Preferably, in the inactivation in step (2), the temperature of the first inactivation zone is 45-50℃, the temperature of the second inactivation zone is 50-55℃, the temperature of the third inactivation zone is 50-55℃, the temperature of the fourth inactivation zone is 50-55℃, the temperature of the fifth inactivation zone is 45-50℃, and the temperature of the sixth inactivation zone is 40-45℃.

[0029] The temperature of the inactivation zone can be 45 DEG C, 47 DEG C, 49 DEG C, 51 DEG C, 53 DEG C or 55 DEG C, the temperature of the inactivation zone II can be 50 DEG C, 51 DEG C, 52 DEG C, 53 DEG C, 54 DEG C or 55 DEG C, the temperature of the inactivation zone III can be 50 DEG C, 51 DEG C, 52 DEG C, 53 DEG C, 54 DEG C or 55 DEG C, the temperature of the inactivation zone IV can be 50 DEG C, 51 DEG C, 52 DEG C, 53 DEG C, 54 DEG C or 55 DEG C, the temperature of the inactivation zone V can be 45 DEG C, 46 DEG C, 47 DEG C, 48 DEG C, 49 DEG C or 50 DEG C, and the temperature of the inactivation zone VI can be 40 DEG C, 41 DEG C, 42 DEG C, 43 DEG C, 44 DEG C or 45 DEG C, but not limited to the above-mentioned values, and other values within the above-mentioned value range are also applicable.

[0030] Preferably, in the loose re-damping of step (3), the hot air return temperature is 60 DEG C-70 DEG C, and the discharge moisture is 20%-22%, wherein the hot air return temperature can be 60 DEG C, 62 DEG C, 64 DEG C, 66 DEG C, 68 DEG C or 70 DEG C, and the discharge moisture can be 20%, 20.5%, 21%, 21.5% or 22%, but not limited to the above-mentioned values, and other values within the above-mentioned value range are also applicable.

[0031] Preferably, in the carbon dioxide impregnation and sublimation of step (3), the cold end impregnation time is 30s-40s, and the hot end sublimation temperature is 300 DEG C-340 DEG C, wherein the cold end impregnation time can be 30s, 32s, 34s, 36s, 38s or 40s, and the hot end sublimation temperature can be 300 DEG C, 310 DEG C, 320 DEG C, 330 DEG C or 340 DEG C, but not limited to the above-mentioned values, and other values within the above-mentioned value range are also applicable.

[0032] The above-mentioned specific parameter control can effectively reduce the bad smoke, improve the smoke comfort and the oral aftertaste.

[0033] In another aspect, the application also provides the use of the method as described above in the processing of warehouse-cured tobacco leaves.

[0034] Compared with the prior art, the application has the following beneficial effects:

[0035] The application provides a method for improving the use value of warehouse-cured tobacco leaves, which can reduce the unique aroma of the cured tobacco leaves by means of the threshing and redrying production line, biological enzyme feeding, inactivation and expanded tobacco thread processing technology, and improve the smoke comfort and the oral aftertaste through the combination of different processing procedures, so that the processed product can be used as a small proportion of a blending material in the production of tobacco type cigarette. DETAILED DESCRIPTION

[0036] For further illustrating the technical means adopted by the present application and its effects, the technical solutions of the present application will be further explained in combination with the preferred embodiments of the present application, but the present application is not limited in the scope of the embodiments.

[0037] In the following examples, the complex protease is purchased from Inner Mongolia Kunming Cigarette Co., Ltd., model MK / JS2-38995; the nicotine degrading enzyme is purchased from Inner Mongolia Kunming Cigarette Co., Ltd., model MK / JS2-39094; the pectinase is purchased from Inner Mongolia Kunming Cigarette Co., Ltd., model MK / JS2-18894; and the catalase is purchased from Inner Mongolia Kunming Cigarette Co., Ltd., model MK / JS2-58914.

[0038] Example 1

[0039] The present embodiment provides a method for improving the use value of in-store air-cured tobacco leaves, and the specific steps are as follows:

[0040] (1) The in-store air-cured tobacco leaves (wherein the mass ratio of sun-cured tobacco, aromatic tobacco and burley tobacco is 5:1:4) are subjected to vacuum re-damping (two cycles are adopted, the first cycle has a vacuum degree of 1.0 kPa and a pressure maintaining time of 100 s, the second cycle has a vacuum degree of 1 kPa and a pressure maintaining time of 15 s, the vacuum re-damping outlet temperature is 75℃, and the discharge moisture is 12%), leaf moistening (the first leaf moistening outlet temperature is 45℃, and the outlet moisture is 19%; the second leaf moistening outlet temperature is 55℃, and the outlet moisture is 21%), and re-drying treatment (the temperature of the first drying zone is 45-55℃, the temperature of the second drying zone is 55-65℃, the temperature of the third drying zone is 75-85℃, the temperature of the fourth drying zone is 55-65℃, the temperature of the fifth drying zone is 45-55℃, and the temperature of the sixth drying zone is 40-50℃. The cooling treatment is performed until the temperature is 30℃ and the moisture is 10%);

[0041] (2) The air-cured tobacco leaf material after the treatment in step (1) is subjected to second vacuum re-damping (one cycle re-damping mode is adopted for vacuum re-damping, the vacuum degree is 1.0 kPa, the pressure maintaining time is 15 s, the outlet temperature is 75℃, and the discharge moisture is 12%), three times of leaf moistening (the outlet temperature is 45℃, and the outlet moisture is 19%), and biological enzyme (6% of the mass of the tobacco leaves is added with biological enzyme aqueous solution, the moisture accounts for 90%, and the mass ratio of the enzyme components is complex protease:nicotine degrading enzyme:pectinase:catalase = 4:3:2:1), inactivation (the temperature of the first inactivation zone is 45-50℃, the temperature of the second inactivation zone is 50-55℃, the temperature of the third inactivation zone is 50-55℃, the temperature of the fourth inactivation zone is 50-55℃, the temperature of the fifth inactivation zone is 45-50℃, and the temperature of the sixth inactivation zone is 40-45℃) after aging (the aging room temperature is 45℃, the humidity is 80%, the material temperature reaches 38℃, and the aging time is 40 h), and boxing.

[0042] (3) The sun-cured tobacco treated in step (2) is loosened and rehydrated in a CO2 expanded cut tobacco production line (hot air rehydration temperature is 65℃, and the output moisture is 21%), and then enters a premixing cabinet. After 5h of aging, the tobacco is cut, and the cut tobacco is rehydrated (the output temperature is 55℃, and the output moisture is 24%). Then, the cut tobacco is subjected to carbon dioxide immersion and sublimation (cold end immersion time is 35s, hot end sublimation temperature is 320℃, and steam flow is 650kg / h). Finally, the expanded cut tobacco is formed.

[0043] Example 2

[0044] The present example provides a method for improving the use value of in-store sun-cured tobacco leaves. The specific steps are consistent with those of Example 1, except that no compound protease is added in step (2), and part of the nicotine degrading enzyme is allocated to the compound protease, pectinase, and catalase in a reduced proportion.

[0045] Example 3

[0046] The present example provides a method for improving the use value of in-store sun-cured tobacco leaves. The specific steps are consistent with those of Example 1, except that no nicotine degrading enzyme is added in step (2), and part of the nicotine degrading enzyme is allocated to the compound protease, pectinase, and catalase in a reduced proportion.

[0047] Example 4

[0048] The present example provides a method for improving the use value of in-store sun-cured tobacco leaves. The specific steps are consistent with those of Example 1, except that no pectinase is added in step (2), and part of the nicotine degrading enzyme, compound protease, and catalase is allocated in a reduced proportion.

[0049] Example 5

[0050] The present example provides a method for improving the use value of in-store sun-cured tobacco leaves. The specific steps are consistent with those of Example 1, except that no catalase is added in step (2), and part of the nicotine degrading enzyme, pectinase, and compound protease is allocated in a reduced proportion.

[0051] Example 6

[0052] The present example provides a method for improving the use value of in-store sun-cured tobacco leaves. The specific steps are consistent with those of Example 1, except that the cold end immersion time in step (3) is 25s.

[0053] Example 7

[0054] The present example provides a method for improving the use value of in-store sun-cured tobacco leaves. The specific steps are consistent with those of Example 1, except that the cold end immersion time in step (3) is 45s.

[0055] Example 8

[0056] The embodiment provides a method for improving the use value of the warehouse-cured tobacco leaves, and the specific steps are consistent with those of the embodiment 1 except that the hot end sublimation temperature in step (3) is 280 DEG C.

[0057] Embodiment 9

[0058] The embodiment provides a method for improving the use value of the warehouse-cured tobacco leaves, and the specific steps are consistent with those of the embodiment 1 except that the hot end sublimation temperature in step (3) is 360 DEG C.

[0059] Effect test:

[0060] The expanded tobacco and the original warehouse-cured tobacco leaves (as original) obtained in the embodiments 1-9 are taken for component determination, and the results are as follows:

[0061]

[0062] From the above data, it can be found that the method provided by the application can effectively reduce the nicotine and total nitrogen content, improve the total sugar and reducing sugar content, and make the chemical components more coordinated.

[0063] Then, seven special grade taste testers are organized, the expanded tobacco obtained in the embodiments 1-9 and the cigarettes made of the original samples are evaluated according to the evaluation contents and evaluation standards in the following table, and the sensory scores of various indexes of the cigarettes are obtained:

[0064]

[0065] The results are as follows:

[0066]

[0067] From the above data, it can be found that the expanded tobacco sample obtained by the method provided by the application has obvious improvement in the indexes of aroma quality, aroma amount, softness, sweetness and aftertaste, and obvious reduction in the indexes of sun-cured tobacco aroma, concentration, strength and irritancy; by comparing the embodiments 1-9, it can be found that the application can effectively reduce the specific bad smoke of the sun-cured tobacco, improve the comprehensive sensory quality, and improve the formula applicability and use value by compounding the four of the complex protease, the nicotine degrading enzyme, the pectinase and the catalase, synergistic effect, and controlling the related parameters.

[0068] The applicant declares that the present application illustrates the method for improving the use value of the warehouse-cured sun-cured tobacco leaves and the application thereof by the above-mentioned embodiments, but the present application is not limited to the above-mentioned embodiments, that is, it does not mean that the present application must rely on the above-mentioned embodiments to be implemented. It should be understood by those skilled in the art that any improvement of the present application, equivalent replacement of each raw material of the product of the present application, addition of auxiliary ingredients, selection of specific modes, etc. fall within the protection scope and the disclosed scope of the present application.

[0069] The preferred embodiments of the present application are described in detail above, but the present application is not limited to the specific details in the above-mentioned embodiments, and within the technical concept scope of the present application, various simple modifications can be made to the technical solutions of the present application, and these simple modifications all belong to the protection scope of the present application.

[0070] In addition, it should be noted that each specific technical feature described in the above-mentioned specific embodiments can be combined by any suitable mode without contradiction, and in order to avoid unnecessary repetition, the present application will not further describe various possible combination modes.

Claims

1. A method for improving the value of warehouse-cured tobacco leaves, characterized in that, The method comprises the following steps: (1) vacuum conditioning, leaf conditioning and redrying of the warehouse-cured tobacco leaves to obtain treated tobacco leaves; (2) vacuum conditioning and leaf conditioning of the treated tobacco leaves, followed by mixing with biological enzymes for alcoholization and inactivation to obtain inactivated tobacco leaves; the biological enzymes are a combination of complex protease, nicotine-degrading enzyme, pectinase and catalase; the biological enzymes are added in the form of an enzyme solution, the addition amount of the enzyme solution is 5%-10% of the mass of the tobacco leaves, and the mass fraction of the enzyme solution is 8%-12%; (3) loose conditioning, cutting and carbon dioxide impregnation and sublimation of the inactivated tobacco leaves on a CO2 expanded cut tobacco production line to obtain expanded cut tobacco; in the carbon dioxide impregnation and sublimation, the cold end impregnation time is 30 s-40 s, and the hot end sublimation temperature is 300℃-340℃.

2. The method of claim 1, wherein, The warehouse-cured tobacco leaves comprise any one or a combination of at least two of sun-cured tobacco, oriental tobacco or burley tobacco.

3. The method of claim 1, wherein, In step (1), the vacuum conditioning is performed in two cycles, the first cycle has a vacuum degree of 0.8-1.2 kPa and a pressure maintaining time of 80-120 s, the second cycle has a vacuum degree of 0.8-1.2 kPa and a pressure maintaining time of 10-20 s, the outlet temperature of the vacuum conditioning is 70℃-80℃, and the outlet moisture content is 11%-13%.

4. The method of claim 1, wherein, In step (1), the leaf conditioning comprises primary leaf conditioning and secondary leaf conditioning, the outlet temperature of the primary leaf conditioning is 40℃-50℃, and the outlet moisture content is 18%-20%; the outlet temperature of the secondary leaf conditioning is 50℃-60℃, and the outlet moisture content is 20%-22%.

5. The method of claim 1, wherein, In step (1), in the redrying, the temperature of the first drying zone is 45℃-55℃, the temperature of the second drying zone is 55℃-65℃, the temperature of the third drying zone is 75℃-85℃, the temperature of the fourth drying zone is 55℃-65℃, the temperature of the fifth drying zone is 45℃-55℃, the temperature of the sixth drying zone is 40℃-50℃, the cooling treatment is performed to a temperature of 25℃-35℃, and the moisture content is 10%-11%.

6. The method of claim 1, wherein, In step (2), the vacuum conditioning is performed in one cycle, the outlet temperature is 70℃-80℃, and the outlet moisture content is 12%-13%.

7. The method of claim 1, wherein, In step (2), in the leaf conditioning, the outlet temperature is 40℃-50℃, and the outlet moisture content is 18%-20%.

8. The method of claim 1, wherein, In step (2), the alcoholization is performed at a temperature of 43℃-48℃ and a humidity of 75%-85% for 36 h-48 h.

9. The method of claim 1, wherein, In step (2), in the inactivation, the temperature of the first inactivation zone is 45℃-50℃, the temperature of the second inactivation zone is 50℃-55℃, the temperature of the third inactivation zone is 50℃-55℃, the temperature of the fourth inactivation zone is 50℃-55℃, the temperature of the fifth inactivation zone is 45℃-50℃, and the temperature of the sixth inactivation zone is 40℃-45℃.

10. The method of claim 1, wherein, In step (3), in the loose conditioning, the hot air return temperature is 60℃-70℃, and the outlet moisture content is 20%-22%.

11. Application of the method according to any one of claims 1-10 in the processing of warehouse-cured tobacco leaves.

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