Combined tobacco shred drying method and system for heating cigarette production line

Abstract

The invention relates to the technical field of cigarette heating, and discloses a tobacco shred combined drying method and system for a cigarette heating production line. The combined drying method comprises the following steps: acquiring the total dehydration mass percentage of cut tobacco, performing hot air-thin plate combined drying on the cut tobacco according to the total dehydration mass percentage, acquiring the variety of flavor components of the cut tobacco, constructing a curved surface prediction equation after combined drying based on the flavor components, and performing dimension reduction treatment on the curved surface prediction equation to obtain the finished product of the cut tobacco. The optimal solution of the plane prediction equation is solved, so that the optimal working point of the combined drying of the tobacco shreds is obtained. According to the method, the optimal combined drying method is set, so that the mass fraction of the aroma components of the tobacco shreds reaches the highest value within the design range, the quality of the tobacco shreds is ensured, the quality production requirements of heated cigarettes are met, the drying efficiency is improved, generation of a prediction equation can be simplified by adopting dimension reduction processing, and the calculation efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of heated cigarettes, and in particular to a tobacco shred combined drying method and system for a heated cigarette production line. Background Art

[0002] In the tobacco industry, tobacco drying is a key link in the production line of heated cigarettes. Traditional drying methods, such as natural air drying and electric air drying, have problems such as long time consumption, high energy consumption, and unstable drying effect. In the prior art, when the modern tobacco industry uses a combined drying process to process tobacco, the drying parameters of the tobacco are not accurately controlled, resulting in excessive or insufficient dehydration of the tobacco, affecting the drying quality and efficiency of the tobacco, affecting the flavor content of the tobacco, and failing to meet the quality control requirements of heated cigarette production. Summary of the invention

[0003] In order to overcome the above problems, the present invention provides a tobacco combined drying method and system for a heated cigarette production line. The combined drying method sets the total dehydration mass percentage of the tobacco, and adopts hot air-thin plate combined drying of the tobacco according to the total dehydration mass percentage to obtain the aroma components of the tobacco, and accordingly establishes a surface prediction equation of the aroma components, performs dimensionality reduction processing on the surface prediction equation, obtains a plane prediction equation based on the aroma components, and solves the optimal solution of the plane prediction equation to obtain the optimal working point of the tobacco combined drying, and sets the optimal combined drying method to achieve the highest value of the aroma component mass fraction of the tobacco within the design range, thereby ensuring the quality of the tobacco, meeting the quality production requirements of heated cigarettes, and improving the drying efficiency. The use of dimensionality reduction processing can simplify the generation of the prediction equation and improve the calculation efficiency.

[0004] In order to achieve the above object, the present invention provides a combined drying method for tobacco in a heated cigarette production line, the combined drying method comprising:

[0005] Obtain the total dehydration mass percentage of the shredded tobacco;

[0006] Drying the shredded tobacco by hot air-thin plate combination according to the total dehydration mass percentage;

[0007] Acquiring the types of flavor components of the shredded tobacco, and constructing a surface prediction equation after joint drying based on the flavor components;

[0008] Performing dimensionality reduction processing on the curved surface prediction equation to obtain a plane prediction equation of the aroma component;

[0009] The optimal solution of the plane prediction equation is solved to obtain the optimal working point of the combined drying of the tobacco shreds.

[0010] Preferably, obtaining the total dehydration mass percentage of the shredded tobacco includes:

[0011] Obtain the total dehydration mass percentage of the shredded tobacco, the hot air drying dehydration mass percentage, and the sheet drying dehydration mass percentage, and obtain the dehydration equation according to formula (1):

[0012] y= (gx), (1)

[0013] Among them, g is the total dehydration mass percentage of the tobacco shreds, x is the dehydration mass percentage of the thin plate drying, and y is the dehydration mass percentage of the hot air drying.

[0014] Preferably, the types of flavor components of the tobacco shreds are obtained, and a surface prediction equation after joint drying is constructed based on the flavor components, including:

[0015] obtaining the aroma component;

[0016] Obtain the hot air drying dehydration mass percentage fraction and the sheet drying dehydration mass percentage fraction, and obtain the surface prediction equation of the mass fraction of the aroma component according to formula (2).

[0017]

[0018] Wherein, z is the predicted value of the mass fraction of the aroma component, k1 to k 15 are the fitting parameters of the surface prediction equation, x is the mass percentage of the thin plate drying and dehydration, y is the mass percentage of the hot air drying and dehydration, h is 0 or 3, m is 0 or 4, n is 0 or 2, p is 0 or 3, and q is 0 or 2.

[0019] Preferably, the surface prediction equation is subjected to dimensionality reduction processing to obtain the plane prediction equation of the aroma component, including:

[0020] Obtaining the hot air drying dehydration mass percentage fraction and the sheet drying dehydration mass percentage fraction;

[0021] Formula (2) is used to convert the hot air drying dehydration mass percentage fraction;

[0022] Formula group (3) is used to determine the plane prediction equation of the aroma component according to the conversion result.

[0023]

[0024] Wherein, z is the predicted value of the mass fraction of the aroma component, b1 is the first fraction of the plane prediction equation, b2 is the second fraction of the plane prediction equation, b3 is the third fraction of the plane prediction equation, b4 is the fourth fraction of the plane prediction equation, k1 to k 15are the fitting parameters of the plane prediction equation, x is the mass percentage of the thin plate drying dehydration, g is the total mass percentage of the tobacco shreds dehydration, h is 0 or 3, m is 0 or 4, n is 0 or 2, p is 0 or 3, and q is 0 or 2.

[0025] Preferably, the total dehydrated mass percentage of the shredded tobacco is in the range of 15.5% to 16.5%.

[0026] Preferably, the working value range of the thin plate drying and dehydration mass percentage is 6-16%.

[0027] Preferably, the moisture content of the shredded tobacco is less than or equal to 3%.

[0028] Preferably, the types of flavor components include at least one of non-enzymatic browning reaction products, phenylalanine degradation products, carotenoid degradation products and ceramsite degradation products.

[0029] A second aspect of the present invention provides a tobacco joint drying system for a hot cigarette production line, the joint drying system comprising:

[0030] Hot air drying device;

[0031] A sheet drying device, arranged at the rear end of the hot air drying device, for drying the shredded tobacco after being processed by the hot air drying device;

[0032] A controller, wherein the controller is electrically connected to the thin plate drying device and the hot air drying device, and is used to execute the combined drying method as claimed in any one of the above claims.

[0033] Preferably, the sheet drying device is a drum-type wire drying device, and the hot air drying device is an airflow-type wire drying device.

[0034] Through the above technical scheme, the combined drying method sets the total dehydration mass percentage of tobacco, designs and controls the total dehydration mass percentage to ensure the applicability of combined drying, and adopts hot air-thin plate combined drying of tobacco according to the total dehydration mass percentage to obtain the aroma components of tobacco, and establishes a surface prediction equation of the aroma components based on this, accurately predicts the mass fraction of the aroma components, performs dimensionality reduction processing on the surface prediction equation, obtains a plane prediction equation based on the aroma components, and solves the optimal solution of the plane prediction equation to obtain the optimal working point of tobacco combined drying, sets the optimal combined drying method to achieve the aroma component mass fraction of tobacco to reach the highest value within the design range, ensures the quality of tobacco, meets the quality production requirements of heated cigarettes, and improves drying efficiency. The use of dimensionality reduction processing can simplify the generation of prediction equations and improve calculation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a flowchart of a tobacco joint drying method for a heated cigarette production line according to an embodiment of the present invention;

[0036] Figure 2 The total dehydration mass percentage of the combined drying of the tobacco cut joint drying method of the heated cigarette production line according to one embodiment of the present invention is 16%, the dehydration mass percentage of the thin plate drying ranges from 6% to 16%, and the corresponding non-enzymatic browning reaction product mass fraction data plane diagram;

[0037] Figure 3 The total dehydration mass percentage of the combined drying of the tobacco cut joint drying method of the heated cigarette production line according to one embodiment of the present invention is 16%, the dehydration mass percentage of the thin plate drying ranges from 6% to 16%, and the corresponding phenylalanine degradation product mass fraction data plane diagram;

[0038] Figure 4 The total dehydration mass percentage of the combined drying of the tobacco cut joint drying method of the heated cigarette production line according to one embodiment of the present invention is 16%, the dehydration mass percentage of the thin plate drying ranges from 6% to 16%, and the corresponding carotenoid degradation product mass fraction data plane diagram;

[0039] Figure 5 The total dehydration mass percentage of combined drying in the tobacco combined drying method for a heated cigarette production line according to an embodiment of the present invention is 16%, the dehydration mass percentage of thin plate drying ranges from 6% to 16%, and the corresponding data plane diagram of the mass fraction of cedarwood degradation products. DETAILED DESCRIPTION

[0040] The specific implementation of the embodiment of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the embodiment of the present invention, and is not used to limit the embodiment of the present invention.

[0041] In the embodiments of the present invention, unless otherwise specified, directional words such as "up, down, top, bottom" are usually used with reference to the directions shown in the drawings or are used to describe the relative positional relationships of components in the vertical, perpendicular or gravity direction.

[0042] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0043] like Figure 1 FIG. 1 is a flowchart of a combined tobacco drying method for a heated cigarette production line according to an embodiment of the present invention; Figure 1 The combined drying method may include:

[0044] In step S10, the total dehydration mass percentage of the tobacco shreds is obtained;

[0045] In step S11, the shredded tobacco is dried by hot air-thin plate combination according to the total dehydration mass percentage;

[0046] In step S12, the types of flavor components of the shredded tobacco are obtained, and a surface prediction equation after joint drying is constructed based on the flavor components;

[0047] In step S13, the surface prediction equation is subjected to dimensionality reduction processing to obtain a plane prediction equation of the aroma component;

[0048] In step S14, the optimal solution of the plane prediction equation is solved to obtain the optimal working point of the combined drying of the tobacco shreds.

[0049] In such Figure 1 In the method shown, step S10 controls the total dehydrated mass percentage of the shredded tobacco.

[0050] In step S11, the tobacco is first dried with hot air at high temperature and then with a thin plate at low temperature according to the total dehydrated mass percentage of the tobacco, so as to adjust the dehydration ratio of the hot air-thin plate combined drying and improve the quality of the tobacco.

[0051] Step S12: obtaining the types of flavor components of the tobacco shreds, and constructing a surface prediction equation after joint drying based on the flavor components;

[0052] Step S13 performs dimensionality reduction processing on the surface prediction equation according to the dehydration equation constructed based on the total dehydration mass percentage to obtain the plane prediction equation of the aroma component.

[0053] Step S14 is to solve the optimal solution of the plane prediction equation to obtain the optimal working point of the combined drying of the tobacco shreds to ensure the feasibility of the combined drying of the tobacco shreds.

[0054] Through the above technical scheme, the combined drying method sets the total dehydration mass percentage of tobacco shreds, and adopts hot air-thin plate combined drying of tobacco shreds according to the total dehydration mass percentage, obtains the aroma components of tobacco shreds, and establishes a surface prediction equation of the aroma components based on this, performs dimensionality reduction processing on the surface prediction equation, obtains a plane prediction equation based on the aroma components, and solves the optimal solution of the plane prediction equation to obtain the optimal working point of tobacco shreds combined drying, sets the optimal combined drying method to achieve the aroma component mass fraction of tobacco shreds to reach the highest value within the design range, ensures the quality of tobacco shreds, meets the quality production requirements of heated cigarettes, and improves drying efficiency. The use of dimensionality reduction processing can simplify the generation of prediction equations and improve calculation efficiency.

[0055] Considering that the linear relationship between the total dehydration mass percentage of the tobacco shreds and the dehydration mass percentage of the hot air drying and the thin plate drying affects the subsequent dimensionality reduction processing, in one embodiment of the present invention, obtaining the total dehydration mass percentage of the tobacco shreds may include obtaining the total dehydration mass percentage of the tobacco shreds, obtaining the dehydration mass percentage of the hot air drying and the thin plate drying, and obtaining the dehydration equation according to formula (1):

[0056] y= (gx), (1)

[0057] Wherein, g is the total dehydration mass percentage of the shredded tobacco, x is the dehydration mass percentage of the thin plate drying, and y is the dehydration mass percentage of the hot air drying;

[0058] The establishment of the dehydration equation facilitates the subsequent adjustment of the ratio of the hot air drying dehydration mass percentage and the thin plate drying dehydration mass percentage, realizes the dimensionality reduction processing of the surface prediction equation, simplifies the model and improves the calculation efficiency.

[0059] In order to facilitate the fitting process of the subsequent surface prediction equation and ensure the reliability of the calculation, in one embodiment of the present invention, obtaining the types of flavor components of the tobacco shreds and constructing the surface prediction equation after joint drying based on the flavor components may include the following steps: obtaining the flavor components; obtaining the hot air drying dehydration mass percentage fraction and the sheet drying dehydration mass percentage fraction, and obtaining the surface prediction equation of the mass fraction of the flavor components according to formula (2).

[0060]

[0061] Wherein, z is the predicted value of the mass fraction of the aroma component, k1 to k 15are the fitting parameters of the surface prediction equation, x is the mass percentage of the thin plate drying dehydration, y is the mass percentage of the hot air drying dehydration, h is 0 or 3, m is 0 or 4, n is 0 or 2, p is 0 or 3, and q is 0 or 2; based on the construction of the surface prediction equation, the subsequent regulation of tobacco dehydration is convenient.

[0062] In order to ensure the dimensionality reduction processing of the surface prediction equation, the plane prediction equation of the aroma component is determined, and the thin plate drying dehydration mass percentage fraction and the hot air drying dehydration mass percentage fraction when the aroma component reaches the maximum value are determined; in one embodiment of the present invention, the surface prediction equation is subjected to dimensionality reduction processing to obtain the plane prediction equation of the aroma component, which may include the following steps: obtaining the hot air drying dehydration mass percentage fraction and the thin plate drying dehydration mass percentage fraction; using formula (2) to convert the hot air drying dehydration mass percentage fraction; using formula group (3) according to the conversion result and determining the plane prediction equation of the aroma component,

[0063]

[0064] Wherein, z is the predicted value of the mass fraction of the aroma component, b1 is the first fraction of the plane prediction equation, b2 is the second fraction of the plane prediction equation, b3 is the third fraction of the plane prediction equation, b4 is the fourth fraction of the plane prediction equation, k1 to k 15 is the fitting parameter of the plane prediction equation, x is the dehydration mass percentage of the thin plate drying, g is the total dehydration mass percentage of the tobacco, h is 0 or 3, m is 0 or 4, n is 0 or 2, p is 0 or 3, and q is 0 or 2. The dehydration equation is substituted into the surface prediction equation for dimensionality reduction to ensure that the plane prediction equation is an equation about the dehydration mass percentage of the thin plate drying, which is convenient for the subsequent control calculation of dehydration and determines the optimal working value of thin plate drying.

[0065] Taking into account the requirements of the tobacco drying process, the quality of the tobacco is ensured, mildew and quality reduction caused by excessive moisture are avoided, and the increased brittleness and fragility of the tobacco caused by too low moisture are prevented; in one embodiment of the present invention, the working value range of the total dehydration mass percentage of the tobacco is 15.5%-16.5%, which ensures the overall quality of the tobacco and improves the processing efficiency; in order to ensure the feasibility of thin plate drying and the quality of the tobacco, in one embodiment of the present invention, the working value range of the dehydration mass percentage of the thin plate drying is 6-16%.

[0066] Considering the quality requirements of the tobacco after drying and controlling the quality of the heated cigarette, in one embodiment of the present invention, the moisture mass percentage of the tobacco after combined drying should be less than or equal to 3% to avoid excessively high smoke temperature caused by water vapor during smoking.

[0067] Taking into account the diversity of flavor components of tobacco and meeting the quality requirements of tobacco, in one embodiment of the present invention, the types of flavor components of tobacco include at least one of non-enzymatic browning reaction products, phenylalanine degradation products, carotenoid degradation products and cedarwood degradation products.

[0068] like Figure 2 The figure shows a combined drying method for combined drying of shredded tobacco in a heated cigarette production line according to an embodiment of the present invention, wherein the total dehydration mass percentage of combined drying is 16%, the dehydration mass percentage of thin plate drying ranges from 6% to 16%, and a data plane diagram of the mass percentage of the corresponding non-enzymatic browning reaction product; Figure 2 When the total dehydration mass percentage of combined drying is 16% and the dehydration mass percentage of thin plate drying is between 6% and 16%, the maximum mass fraction of the non-enzymatic browning reaction product of tobacco after combined drying is 20.53 μg / g, and the maximum value corresponds to the dehydration mass percentage of thin plate drying of 12.53%. By calculation, it can be obtained that the maximum value of the mass fraction of the non-enzymatic browning reaction product corresponds to the dehydration mass percentage of hot air drying of 3.47%.

[0069] Therefore, when the dehydration mass percentage of hot air drying is 3.47% and the dehydration mass percentage of thin plate drying is 12.53%, the mass fraction of non-enzymatic browning reaction products of tobacco after combined drying reaches a maximum value of 20.53 μg / g, achieving optimal control of the mass fraction of non-enzymatic browning reaction products of tobacco.

[0070] like Figure 3 The figure shows a combined drying method for combined drying of shredded tobacco in a heated cigarette production line according to an embodiment of the present invention, wherein the total dehydration mass percentage of combined drying is 16%, the dehydration mass percentage of thin plate drying ranges from 6% to 16%, and a data plane diagram of the mass fraction of corresponding phenylalanine degradation products; Figure 3 When the total dehydration mass percentage of combined drying is 16% and the dehydration mass percentage of thin plate drying is between 6% and 16%, the maximum mass fraction of phenylalanine degradation products in tobacco after combined drying is 11.52 μg / g, and the maximum value corresponds to the dehydration mass percentage of thin plate drying of 13.21%. By calculation, it can be obtained that the maximum value of the mass fraction of phenylalanine degradation products corresponds to the dehydration mass percentage of hot air drying of 2.79%.

[0071] Therefore, when the dehydration mass percentage of hot air drying is 2.79% and the dehydration mass percentage of thin plate drying is 13.21%, the mass fraction of phenylalanine degradation products in tobacco after combined drying reaches a maximum value of 11.52 μg / g, achieving optimal control of the mass fraction of phenylalanine degradation products in tobacco.

[0072] like Figure 4 The figure shows a combined drying method for combined drying of shredded tobacco in a heated cigarette production line according to an embodiment of the present invention, wherein the total dehydration mass percentage of combined drying is 16%, the dehydration mass percentage of thin plate drying ranges from 6% to 16%, and a data plane diagram of the mass fraction of corresponding carotenoid degradation products; Figure 4 When the total dehydration mass percentage of combined drying is 16% and the dehydration mass percentage of thin plate drying is between 6% and 16%, the maximum mass fraction of carotenoid degradation products of tobacco after combined drying is 98.85 μg / g, and the maximum value corresponds to the dehydration mass percentage of thin plate drying of 14.04%. By calculation, it can be obtained that the maximum value of the mass fraction of carotenoid degradation products corresponds to the dehydration mass percentage of hot air drying of 1.96%.

[0073] Therefore, when the dehydration mass percentage of hot air drying is 1.96% and the dehydration mass percentage of thin plate drying is 14.04%, the mass fraction of carotenoid degradation products in tobacco after combined drying reaches a maximum value of 98.85 μg / g, achieving optimal control of the mass fraction of carotenoid degradation products in tobacco.

[0074] like Figure 5 The figure shows a combined drying method for combined drying of shredded tobacco in a heated cigarette production line according to an embodiment of the present invention, wherein the total dehydration mass percentage of combined drying is 16%, the dehydration mass percentage of sheet drying ranges from 6% to 16%, and a plane diagram of the corresponding mass fraction of cedarwood degradation products; Figure 5 When the total dehydration mass percentage of combined drying is 16% and the dehydration mass percentage of thin plate drying is between 6% and 16%, the maximum mass fraction of cypermethrin degradation products of tobacco after combined drying is 31.7 μg / g, and the maximum value corresponds to the dehydration mass percentage of thin plate drying of 10.42%. By calculation, the maximum value of the mass fraction of cypermethrin degradation products corresponding to the dehydration mass percentage of hot air drying is 5.58%.

[0075] Therefore, when the dehydration mass percentage of hot air drying is 5.58% and the dehydration mass percentage of thin plate drying is 10.42%, the mass fraction of cedarwood degradation products in tobacco after combined drying reaches a maximum value of 31.7 μg / g, achieving optimal control of the mass fraction of cedarwood degradation products in tobacco.

[0076] On the other hand, the present invention provides a tobacco joint drying system for a hot cigarette production line, the joint drying system comprising a hot air drying device, a thin plate drying device and a controller; specifically, the thin plate drying device can be arranged at the rear end of the hot air drying device, and is used to dry the tobacco processed by the hot air drying device; the controller, the controller is electrically connected to the thin plate drying device and the hot air drying device, and is used to execute the joint drying method as described in any of the above claims, and the controller can regulate the hot air drying device and the thin plate drying device to dry the tobacco so that it meets the required hot air drying dehydration mass percentage fraction and the thin plate drying dehydration mass percentage fraction requirements.

[0077] Taking into account the applicability and practicality of the combined drying process; in one embodiment of the present invention, the thin plate drying device is a drum-type wire drying device, and the hot air drying device is an airflow-type wire drying device; the drum-type wire drying device gradually dries the tobacco by means of continuously rotating thin plates, and its rotary drying method helps to maintain the temperature and humidity balance in the equipment, thereby better controlling the drying speed and product quality; the airflow-type wire drying device heats the air to a specific temperature and humidity so that the hot air is in full contact with the tobacco, thereby quickly removing moisture from the tobacco.

[0078] Through the above technical scheme, the combined drying method sets the total dehydration mass percentage of tobacco, designs and controls the total dehydration mass percentage to ensure the applicability of combined drying, and adopts hot air-thin plate combined drying of tobacco according to the total dehydration mass percentage to obtain the aroma components of tobacco, and establishes a surface prediction equation of the aroma components based on this, accurately predicts the mass fraction of the aroma components, performs dimensionality reduction processing on the surface prediction equation, obtains a plane prediction equation based on the aroma components, and solves the optimal solution of the plane prediction equation to obtain the optimal working point of tobacco combined drying, sets the optimal combined drying method to achieve the aroma component mass fraction of tobacco to reach the highest value within the design range, ensures the quality of tobacco, meets the quality production requirements of heated cigarettes, and improves drying efficiency. The use of dimensionality reduction processing can simplify the generation of prediction equations and improve calculation efficiency.

[0079] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, and these simple modifications all belong to the protection scope of the present invention. It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0080] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A combined drying method for tobacco in a heated cigarette production line, characterized in that: The combined drying method comprises: Obtain the total dehydration mass percentage of the shredded tobacco; Drying the shredded tobacco by hot air-thin plate combination according to the total dehydration mass percentage; Acquiring the types of flavor components of the shredded tobacco, and constructing a surface prediction equation after joint drying based on the flavor components; Performing dimensionality reduction processing on the curved surface prediction equation to obtain a plane prediction equation of the aroma component; The optimal solution of the plane prediction equation is solved to obtain the optimal working point of the combined drying of the tobacco shreds.

2. The combined drying method according to claim 1, characterized in that: Obtain the total dehydration mass percentage of the tobacco, including: Obtain the total dehydration mass percentage of the shredded tobacco, the hot air drying dehydration mass percentage, and the sheet drying dehydration mass percentage, and obtain the dehydration equation according to formula (1): y= (gx), (1) Among them, g is the total dehydration mass percentage of the tobacco shreds, x is the dehydration mass percentage of the thin plate drying, and y is the dehydration mass percentage of the hot air drying.

3. The combined drying method according to claim 2, characterized in that: Obtaining the types of flavor components of the tobacco shreds, and constructing a surface prediction equation after joint drying based on the flavor components, including: obtaining the aroma component; Obtain the hot air drying dehydration mass percentage fraction and the sheet drying dehydration mass percentage fraction, and obtain the surface prediction equation of the mass fraction of the aroma component according to formula (2). Wherein, z is the predicted value of the mass fraction of the aroma component, k1 to k 15 are the fitting parameters of the surface prediction equation, x is the mass percentage of the thin plate drying and dehydration, y is the mass percentage of the hot air drying and dehydration, h is 0 or 3, m is 0 or 4, n is 0 or 2, p is 0 or 3, and q is 0 or 2.

4. The combined drying method according to claim 3, characterized in that: The surface prediction equation is subjected to dimensionality reduction processing to obtain the plane prediction equation of the aroma component, including: Obtaining the hot air drying dehydration mass percentage fraction and the sheet drying dehydration mass percentage fraction; Formula (2) is used to convert the hot air drying dehydration mass percentage fraction; Formula group (3) is used to determine the plane prediction equation of the aroma component according to the conversion result. Wherein, z is the predicted value of the mass fraction of the aroma component, b1 is the first fraction of the plane prediction equation, b2 is the second fraction of the plane prediction equation, b3 is the third fraction of the plane prediction equation, b4 is the fourth fraction of the plane prediction equation, k1 to k 15 are the fitting parameters of the plane prediction equation, x is the mass percentage of the thin plate drying dehydration, g is the total mass percentage of the tobacco shreds dehydration, h is 0 or 3, m is 0 or 4, n is 0 or 2, p is 0 or 3, and q is 0 or 2.

5. The combined drying method according to claim 1, characterized in that: The working value range of the total dehydrated mass percentage of the tobacco shreds is 15.5%-16.5%.

6. The combined drying method according to claim 2, characterized in that: The working value range of the thin plate drying and dehydration mass percentage is 6-16%.

7. The combined drying method according to claim 1, characterized in that: The moisture content of the tobacco shreds is less than or equal to 3%.

8. The combined drying method according to claim 1, characterized in that: The types of flavor components include at least one of non-enzymatic browning reaction products, phenylalanine degradation products, carotenoid degradation products, and ceramsite degradation products.

9. A tobacco joint drying system for a hot cigarette production line, characterized in that: The combined drying system comprises: Hot air drying device; A sheet drying device, arranged at the rear end of the hot air drying device, for drying the shredded tobacco after being processed by the hot air drying device; A controller, wherein the controller is electrically connected to the thin plate drying device and the hot air drying device, and is used to execute the combined drying method as described in any one of claims 1-8.

10. The combined drying system according to claim 9, characterized in that: The thin plate drying device is a drum-type wire drying device, and the hot air drying device is an airflow-type wire drying device.

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