Threshing and redrying formula module design method based on mechanical and chemical characteristics of tobacco leaves

Abstract

The invention discloses a threshing and redrying formula module design method based on mechanical and chemical characteristics of tobacco leaves. The method comprises the following steps: acquiring comprehensive crushing resistance indexes of tobacco leaf raw materials; performing clustering analysis on the comprehensive crushing resistance indexes, and dividing each tobacco leaf raw material into two groups; chemical component indexes of all the tobacco leaf raw materials are measured, and availability indexes of all the tobacco leaf raw materials are obtained through calculation; and according to the function positioning of the formula module, matching the tobacco leaf raw materials in each group according to the availability index, and designing the formula module with a target function. According to the threshing and redrying formula module design method provided by the invention, on the premise of ensuring the functions of the formula module, the uniformity of the size distribution of the tobacco strips after threshing and air separation can be improved, the participation of subjective experience such as sensory quality smoke panel test of raw materials is reduced, and a support is provided for the quality control of the threshing and redrying tobacco strips and the meeting of the requirements of cigarette processing raw materials.

Description

Technical Field

[0001] This invention relates to the field of tobacco leaf re-drying technology, and in particular to a method for designing tobacco leaf re-drying formulation modules based on the mechanical and chemical properties of tobacco leaves. Background Technology

[0002] Tillage and re-drying is the first stage of industrial processing for tobacco leaves, playing a crucial role in maximizing the value of raw materials. This process provides cigarette production with homogenized tobacco leaves that offer stable quality and style, high industrial usability, and significantly expands the range of raw material applications while ensuring quality. With the continuous development of Chinese cigarette brands, the demand for homogenized and stable raw materials is increasing. However, my country's tobacco planting and purchasing model results in cigarette companies acquiring raw materials of various grades in small batches, which is mismatched with the raw material requirements of cigarette products. Therefore, how to combine different tobacco leaves into modular raw materials before tillage and re-drying is a vital way to provide cigarette manufacturers with stable and homogenized raw materials.

[0003] In recent years, tobacco industry scientists have developed some targeted technologies for the design of tobacco leaf re-drying formulation modules. However, under the same threshing and air-sifting process parameters after leaf feeding in the threshing and re-drying line, the raw materials, designed using existing formulation methods, are prone to uneven sheet structure due to differences in their mechanical properties. For example, raw materials with stronger mechanical properties tend to produce a higher percentage of large sheets after threshing and air-sifting, while raw materials with poor mechanical properties tend to produce a higher percentage of fragments. This problem of wide sheet size distribution caused by large differences in the mechanical properties of raw materials in the module puts pressure on the control of tobacco shred structure in the subsequent shredding process. To address this, invention publication CN102488306A discloses a new threshing and re-drying process based on differences in the mechanical properties of tobacco leaves. Essentially, it involves grouping raw materials with different mechanical properties (adhesion and tensile strength) for processing, but this increases the complexity of the process and the difficulty of production organization. If the design of threshing and re-drying raw material modules is organized based on the principles of similar mechanical properties and matching chemical composition, it is possible to form formulation modules with specific functions and more uniform sheet size distribution after threshing.

[0004] Based on this, the present invention proposes a method for designing a tobacco leaf re-drying formulation module based on the mechanical and chemical properties of tobacco leaves. Summary of the Invention

[0005] The purpose of this invention is to propose a method for designing tobacco leaf re-drying formulation modules based on the mechanical and chemical properties of tobacco leaves. The concept is to first cluster the raw materials based on the comprehensive crush resistance of the tobacco leaves, and then rationally design formulation modules with specific functional positioning according to the availability index of the raw materials within the group. This achieves an improvement in the uniformity of tobacco leaf size distribution after threshing and air separation. This method takes into account both the functional positioning of the formulation modules and the uniformity of tobacco leaf size after threshing and air separation, and can provide a way to improve the use value of raw materials and the level of uniformity of tobacco leaf size.

[0006] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: A modular design method for tobacco leaf re-drying formulations based on the mechanical and chemical properties of tobacco leaves, including Obtain the comprehensive shatter resistance index of the single-grade tobacco raw material to be entered into the formulation module; Cluster analysis was performed on the comprehensive shatter resistance index to divide the tobacco raw materials into two groups; The chemical composition indicators of each tobacco leaf raw material were determined, and the usability index of each tobacco leaf raw material was calculated. Based on the functional positioning of the formulation module, the tobacco raw materials in each group are matched according to the availability index to design a formulation module with the target function.

[0007] The beneficial effects of this invention are as follows: The method of this invention can improve the uniformity of tobacco sheet size distribution after leaf blasting and air separation while ensuring the target function of the formulation module. It reduces the involvement of subjective experience such as sensory quality evaluation of raw materials, and takes into account both the functional positioning of the formulation module and the uniformity of leaf sheet size after leaf blasting and air separation. It provides a way to improve the homogenization level of tobacco sheet size and a method to control the leaf sheet shape after leaf blasting and re-drying and meet the structural requirements of tobacco shreds in cigarette processing. Detailed Implementation

[0008] The technical solutions of the present invention will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0009] Furthermore, the following description is for illustrative purposes and not for limitation, providing specific details such as particular system structures and technical steps to ensure a thorough understanding of the embodiments of the present invention. However, those skilled in the art will understand that the present invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, and methods are omitted to avoid unnecessary detail that could obscure the description of the invention. Unless otherwise specified, the experimental methods used in the following embodiments are conventional methods; the materials and reagents used, unless otherwise specified, are commercially available.

[0010] The first embodiment of the present invention provides a method for designing a tobacco leaf re-drying formulation module based on the mechanical and chemical properties of tobacco leaves. The method includes the following steps: S1 balances the single-grade tobacco raw materials to be entered into the formulation module, then quickly crushes and sieves them using a plant crusher, and obtains the comprehensive crush resistance index S of each tobacco raw material sample by weight ratio method. Based on the comprehensive shatter resistance index S, S2 divides each tobacco leaf raw material into two groups through cluster analysis; S3 measures the conventional chemical composition of each tobacco raw material, including total sugar, reducing sugar, total alkaloids, chlorine, total nitrogen and potassium, as well as derivative indicators, including sugar-alkaloid ratio, nitrogen-alkaloid ratio and potassium-chlorine ratio. Based on the above indicators, the availability index of each tobacco raw material is calculated. Based on the functional positioning of the formulation module, S4 combines the tobacco raw materials in each group according to the availability index to design a leaf threshing and re-drying formulation module with the target function, and determines the types and proportions of each tobacco raw material in the formulation module.

[0011] The following section will provide a more detailed description of the leaf-re-drying formula module design method of the present invention, in conjunction with specific implementation methods and preferred technical approaches, so as to more fully demonstrate the technical advantages and feasibility of the present invention.

[0012] Step S1: After equilibrating the single-grade tobacco raw materials to be entered into the formulation module at a temperature of 30℃ and a relative humidity of 70% for 12 hours, the main vein of the equilibrated tobacco raw materials is removed, and each different raw material is divided into 5 equal parts from the leaf tip to the leaf base. Each type of tobacco raw material is placed in a plant pulverizer. The pulverizer power is set to 200W, the speed is 700~1500r / min, and the pulverization time is 5s. After rapid pulverization using the plant pulverizer, the samples are sieved. The mesh diameter of the sieve is 2.36mm. The comprehensive shatter resistance index S of each sample is calculated by the weight ratio method. The comprehensive shatter resistance index S is the percentage of the mass of the material on the sieve to the total mass of the sieved material.

[0013] Step S2: The Ward method (minimizing within-group variance) of Euclidean distance in systematic clustering is used to cluster the comprehensive shatter resistance index S. Based on the cluster analysis results, the tobacco raw materials are divided into two groups, which are named S1 and S2 respectively according to the S value from high to low. The results are shown in Table 1.

[0014] Table 1. Raw material information and comprehensive shatter resistance index S to be included in the formulation module

[0015] Step S3: According to the industry standard for determining conventional chemical components in the tobacco industry, the conventional chemical components of each tobacco leaf raw material in Table 1 are determined, including total sugar, reducing sugar, total alkaloids, chlorine, total nitrogen and potassium, as well as derivative indicators, including sugar-alkaloid ratio, nitrogen-alkaloid ratio and potassium-chlorine ratio. At the same time, the availability index CCUI of each tobacco leaf raw material is calculated using the membership function model (China Tobacco Science, 2017, 23 (02): 13-27.).

[0016] Step S4: Based on the functional positioning of the target formulation module and the availability index CCUI, the tobacco raw materials are matched according to their availability index in the two groups to design a threshing and re-drying formulation module with the target function. The types and proportions of each tobacco raw material in the formulation module are determined. The specific results are shown in Table 2. Table 2. Composition of tobacco raw materials in the leaf re-drying formulation module

[0017] Since Group S1 has a higher overall crush resistance index (S value), indicating better mechanical properties, its overall quality is generally higher. Therefore, an aroma and texture module and a concentration and penetration enhancement module are designed within Group S1. Specifically, in the aroma and texture module, the proportion of tobacco raw materials with CCUI ≥ 0.6 is no less than 70%, the proportion of tobacco raw materials with 0.4 ≤ CCUI ≤ 0.6 is no more than 20%, and the proportion of tobacco raw materials with CCUI ≤ 0.4 is no more than 10%. In the concentration and penetration enhancement module, the proportion of tobacco raw materials with CCUI ≥ 0.6 is between 40-50%, the proportion of tobacco raw materials with 0.4 ≤ CCUI ≤ 0.6 is between 30-40%, and the proportion of tobacco raw materials with CCUI ≤ 0.4 is no less than 10%. Within the S2 group, a smoke balance module and a taste improvement module are designed. In the smoke balance module, the proportion of tobacco raw materials with CCUI≥0.5 is not less than 60%, and in the taste improvement module, the proportion of tobacco raw materials with CCUI≥0.5 is between 40-50%.

[0018] To verify the effectiveness of the design method in this embodiment, the leaf-beating and air-splitting parameters were set for the formula modules designed in groups S1 and S2, and other processes were carried out according to the normal flow and parameters. The characteristic size and uniformity coefficient of the tobacco leaves after leaf-beating and air-splitting were determined by the leaf area method. The results are shown in Table 3.

[0019] Table 3 Sensory quality evaluation and uniformity coefficient of tobacco leaf size distribution after leaf blowing for representative formulation modules

[0020] It can be seen that the uniformity coefficient of the formula module designed in this embodiment is generally higher than the average level (1.09) of the uniformity coefficient of the size distribution of the tobacco leaves after pounding in previous years' pounding and re-drying formula modules.

[0021] The second embodiment of the present invention relates to a tobacco leaf threshing and re-drying formulation module design system based on the mechanical and chemical properties of tobacco leaves, comprising: The comprehensive shatter resistance index calculation unit is used to obtain the comprehensive shatter resistance index S of each single-grade tobacco raw material sample to be entered into the formulation module; Clustering grouping unit, used to divide each single-grade tobacco raw material into two groups based on the comprehensive shatter resistance index S through cluster analysis; The availability index calculation unit is used to determine the conventional chemical composition and derivative indicators of each tobacco raw material, and calculates the availability index of each single-grade tobacco raw material. The target function module design unit is used to design a threshing and re-drying formula module with target functions by matching the tobacco raw materials in each group according to the availability index based on the functional positioning of the formula module, and determining the types and proportions of each tobacco raw material in the formula module.

[0022] It should be noted that the descriptions of each embodiment in the above embodiments have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0023] Furthermore, the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A method for designing tobacco leaf threshing and re-drying formulation modules based on the mechanical and chemical properties of tobacco leaves, characterized in that: include Obtain the comprehensive shatter resistance index of the single-grade tobacco raw material to be entered into the formulation module; Cluster analysis was performed on the comprehensive shatter resistance index to divide the tobacco raw materials into two groups; The chemical composition indicators of each tobacco leaf raw material were determined, and the usability index of each tobacco leaf raw material was calculated. Based on the functional positioning of the formulation module, the tobacco raw materials in each group are matched according to the availability index to design a formulation module with the target function.

2. The method for designing the leaf-re-drying formula module according to claim 1, characterized in that: The design method includes steps. S1 balances the single-grade tobacco raw materials to be entered into the formulation module, and obtains the comprehensive crush resistance index S of each tobacco raw material sample by crushing, sieving and weight ratio method. Based on the comprehensive shatter resistance index S, S2 divides each tobacco leaf raw material into two groups, denoted as S1 and S2, through cluster analysis. S3 measures the conventional chemical composition of each tobacco raw material, including total sugar, reducing sugar, total alkaloids, chlorine, total nitrogen and potassium, as well as derivative indicators, including sugar-alkaloid ratio, nitrogen-alkaloid ratio and potassium-chlorine ratio. Based on the above indicators, the availability index of each tobacco raw material is calculated. Based on the functional positioning of the formulation module, S4 combines the tobacco raw materials in each group according to the availability index to design a leaf threshing and re-drying formulation module with the target function, and determines the types and proportions of each tobacco raw material in the formulation module.

3. The method for designing the leaf-re-drying formula module according to claim 2, characterized in that: In step S1, the equilibrium temperature of the single-grade tobacco raw material is 30~35℃, the relative humidity is 70~90%, and the equilibrium time is not less than 12 hours.

4. The method for designing the leaf-re-drying formula module according to claim 2, characterized in that: In step S1, the main vein of the balanced tobacco leaves is removed, and each tobacco leaf is divided into 5 to 15 equal parts from the leaf tip to the leaf base. Each part is then placed in a plant pulverizer with the power set to 200W, the speed set to 700 to 1500 r / min, and the pulverizing time set to 5 seconds.

5. The method for designing the leaf-re-drying formula module according to claim 2, characterized in that: In step S1, the mesh diameter of the sieve is 2.36 mm, and the comprehensive crush resistance index S is the percentage of the material mass on the sieve to the total material mass of the sieve.

6. The method for designing the leaf-re-drying formula module according to claim 1 or 2, characterized in that: In step S2, the obtained comprehensive shatter resistance index is subjected to distance clustering using cluster analysis. Based on the clustering results, each tobacco raw material is divided into two groups, labeled S1 and S2 according to their numerical values.

7. The method for designing a leaf-re-drying formula module according to claim 1 or 2, characterized in that: In step S3, the availability index (CCUI) of each tobacco leaf raw material is calculated based on the industry standard for the determination of conventional chemical components in the tobacco industry and the membership function model.

8. The method for designing the leaf-re-drying formula module according to claim 2, characterized in that: In step S4, based on the functional positioning of the formulation module, the tobacco raw materials in each group are matched according to the availability index: Within group S1, an aroma and texture module and a concentration and penetration enhancement module are designed. In the aroma and texture module, the proportion of tobacco raw materials with CCUI ≥ 0.6 is no less than 70%, the proportion of tobacco raw materials with 0.4 ≤ CCUI ≤ 0.6 is no more than 20%, and the proportion of tobacco raw materials with CCUI ≤ 0.4 is no more than 10%. In the concentration and penetration enhancement module, the proportion of tobacco raw materials with CCUI ≥ 0.6 is between 40-50%, the proportion of tobacco raw materials with 0.4 ≤ CCUI ≤ 0.6 is between 30-40%, and the proportion of tobacco raw materials with CCUI ≤ 0.4 is no less than 10%. Within the S2 group, a smoke balance module and a taste improvement module are designed. In the smoke balance module, the proportion of tobacco raw materials with CCUI≥0.5 is not less than 60%, and in the taste improvement module, the proportion of tobacco raw materials with CCUI≥0.5 is between 40-50%.

9. A tobacco leaf threshing and re-drying formulation module design system based on the mechanical and chemical properties of tobacco leaves, characterized in that: The system is used to implement the steps of the leaf-drying and re-drying formula module design method according to any one of claims 1 to 8, which includes: The comprehensive shatter resistance index calculation unit is used to obtain the comprehensive shatter resistance index S of each single-grade tobacco raw material sample to be entered into the formulation module; Clustering grouping unit, used to divide each single-grade tobacco raw material into two groups based on the comprehensive shatter resistance index S through cluster analysis; The availability index calculation unit is used to determine the conventional chemical composition and derivative indicators of each tobacco raw material, and calculates the availability index of each single-grade tobacco raw material. The target function module design unit is used to design a threshing and re-drying formula module with target functions by matching the tobacco raw materials in each group according to the availability index based on the functional positioning of the formula module, and determining the types and proportions of each tobacco raw material in the formula module.

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