Design method of threshing and redrying formula module

Abstract

The invention discloses a design method of a threshing and redrying formula module. The design method comprises the following steps: acquiring a non-isothermal drying activation energy value of each tobacco leaf raw material to enter the formula module; based on the non-isothermal drying activation energy value, tobacco leaf raw materials are divided into a plurality of groups through clustering analysis; obtaining sensory quality index values of the single-material cigarettes prepared from the tobacco leaf raw materials; according to the function positioning of the formula module and the sensory quality index value, based on the sensory quality index function orientation approaching principle of the tobacco leaf raw materials, the tobacco leaf raw materials in each group are proportionally assembled into a target function formula module for threshing and redrying processing. According to the threshing and redrying formula module design method provided by the invention, on the premise of ensuring the function of the formula module, the uniformity and the stability of moisture of the tobacco strips at the outlet of the redrying machine can be improved, and the storage of the threshed and redried finished tobacco strips is facilitated.

Description

Technical Field

[0001] This invention relates to the field of tobacco leaf formulation, and more specifically to a design method for a tobacco leaf re-drying formulation module. Background Technology

[0002] As the first workshop for tobacco leaves entering industrial processing, threshing and re-drying plays an important role in exploring and maximizing the value of raw materials. Through the design of threshing and re-drying formula modules, homogenized tobacco leaves with stable raw material quality and style and high industrial usability can be provided for cigarette production. This is an important technical means to broaden the scope of raw material use and ensure raw material quality.

[0003] The domestic tobacco production organization structure dictates that industrial enterprises acquire raw materials of various grades in small batches. The national standard for flue-cured tobacco grading includes 42 grades of raw materials. Therefore, modularizing these different grades of raw materials according to certain principles through formulation technology is a prerequisite for ensuring stable raw material quality. In recent years, tobacco industry scientists have developed some targeted technical methods around the design of re-drying formulation modules. For example, invention publication CN1830335A discloses a method for designing formulations by combining several different grades of tobacco leaves with similar or identical style characteristics in a certain proportion, based on the HTJ value of the tobacco leaf's chemical composition; invention publication CN104568825B discloses a method for identifying the sensory quality characteristics of raw materials using near-infrared spectroscopy combined with model construction, providing a rapid method for positioning tobacco leaf raw materials in formulation modules; and invention publication CN 111543668B discloses a method for collecting near-infrared spectra of sample powder, merging six chemical indicators, part indices, and aroma indices into an intrinsic quality characterization index for tobacco leaves, and then using a near-infrared spectral model to replace the original formulation tobacco leaves.

[0004] The above methods provide a reference for the design of leaf re-drying formulation modules. However, due to the different processing characteristics of raw materials of different quality grades, the modules formed by the formulation technology face fluctuations in processing quality stability during the leaf re-drying process. In particular, after the tobacco leaf re-drying process, the inconsistent drying characteristics of the raw materials result in poor uniformity and stability of the moisture content of the tobacco leaves at the re-drying stage, which poses a risk to the aging quality of the raw materials during subsequent packaging and storage.

[0005] One of the key issues we face is how to achieve a reasonable combination of leaf re-drying formula modules while ensuring the stability of moisture content at the re-drying outlet. Summary of the Invention

[0006] To address the aforementioned technical problems, this invention proposes a design method for a tobacco leaf re-drying formulation module. The concept involves first clustering tobacco leaf raw materials based on their non-isothermal drying activation energy values. Then, combining the sensory quality characteristics of the tobacco leaf raw materials within each group, a tobacco leaf re-drying formulation module is designed that combines formulation functional characteristics with processing uniformity. This achieves uniformity and stability of moisture content in the re-dried tobacco leaves. This method balances the functional positioning of the formulation module with the issue of moisture uniformity during processing, providing further support for the design of tobacco leaf re-drying formulation modules.

[0007] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: A design method for a leaf re-roasting recipe module, including Obtain the non-isothermal drying activation energy value of each tobacco raw material to be entered into the formulation module; Based on the non-isothermal drying activation energy value, the tobacco raw materials were divided into several groups through cluster analysis; Obtain the sensory quality index values ​​of single-material cigarettes made from each tobacco leaf raw material; Based on the functional positioning of the formulation module and the sensory quality index values, and based on the principle of functional proximity of the sensory quality index of tobacco raw materials, the tobacco raw materials in each group are proportionally combined into a target functional formulation module for leaf threshing and re-drying processing.

[0008] As an improvement to the above technical solution, the design method of the leaf-beating and re-drying formula module specifically includes the following steps: S1 pulverizes and balances each tobacco leaf raw material to be included in the formulation module, conducts a non-isothermal drying experiment, records the thermogravimetric data during the drying process, and uses a non-isothermal drying kinetic model to calculate the non-isothermal drying kinetic parameters of each tobacco leaf raw material, including the non-isothermal drying activation energy value. ; S2 is based on the non-isothermal drying activation energy value. Cluster analysis was used to divide the tobacco raw materials into 3 to 4 groups; S3 involves rehydrating and shredding the tobacco leaves from S1, then rolling them into single-material cigarettes. A sensory evaluation team is then organized to conduct a sensory quality evaluation and obtain various sensory quality index values ​​for the tobacco leaves. S4, based on the functional positioning of the formulation module and the sensory quality index values, and based on the principle of functional proximity of the sensory quality index of tobacco raw materials, determines the types of tobacco raw materials in each group that have the target functional role, and combines the tobacco raw materials in each group in proportion to form the target functional formulation module for leaf threshing and re-drying processing.

[0009] The beneficial effects of this invention are as follows: The design method of the leaf re-drying formulation module of the present invention takes into account both the drying characteristics of tobacco raw materials and the functional orientation of sensory quality indicators. While realizing the sensory function of the formulation module, it facilitates the uniformity and consistency of moisture during the re-drying process, which is conducive to improving the use value of raw materials and the storage safety of finished tobacco sheets, and provides a way for the scientific and rational design of leaf re-drying formulation modules. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is a schematic diagram of the method steps provided in the embodiments of the present invention; Figure 2 This is a schematic diagram of the system modules provided in an embodiment of the present invention. Detailed Implementation

[0012] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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.

[0013] Furthermore, the following description is for illustrative purposes and not for limitation, and sets forth specific details such as particular system structures and technical steps to provide 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 present invention.

[0014] Unless otherwise specified, the experimental methods used in the following examples are conventional methods; the materials and reagents used are commercially available unless otherwise specified.

[0015] Figure 1 The diagram illustrates a design method for a leaf-based re-drying recipe module according to a first embodiment of the present invention. The method includes the following steps: S1 pulverizes and balances each tobacco leaf raw material to be included in the formulation module, conducts a non-isothermal drying experiment, records the thermogravimetric data during the drying process, and uses a non-isothermal drying kinetic model to calculate the non-isothermal drying kinetic parameters of each tobacco leaf raw material, including the non-isothermal drying activation energy value. ; S2 is based on the non-isothermal drying activation energy value. Cluster analysis was used to divide the tobacco raw materials into several groups; S3 involves rehydrating and shredding the tobacco leaves from S1, then rolling them into single-material cigarettes. A sensory evaluation team is then organized to conduct a sensory quality evaluation and obtain various sensory quality index values ​​for the tobacco leaves. S4, based on the functional positioning of the formulation module and the sensory quality index values, and based on the principle of functional proximity of the sensory quality index of tobacco raw materials, determines the types of tobacco raw materials in each group that have the target functional role, and combines the tobacco raw materials in each group in proportion to form the target functional formulation module for leaf threshing and re-drying processing.

[0016] It should be noted that the sequence numbers of the steps described above in this embodiment are only for the purpose of clearly explaining the technical solution and making the logical relationship between each technical link easier to understand. They are not intended to limit the strict execution order of the steps in this invention, nor do they imply that each step is a mandatory execution step necessary to achieve the technical effect of this invention. In the actual application of the technical solution of this invention, the execution order of each step can be reasonably adjusted, unnecessary auxiliary steps can be omitted, or adaptive pre-processing / post-processing steps can be added, based on specific working conditions, equipment conditions, and target requirements, without departing from the core concept and protection scope of this invention.

[0017] The following will provide a more detailed description of the technical solution 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.

[0018] Step S1: After crushing and sieving the tobacco raw materials to be entered into the formulation module, the material is obtained through a 60-mesh sieve. The tobacco powder material is placed in a constant temperature and humidity chamber at 30°C and 80% relative humidity for equilibration. Then, a non-isothermal drying experiment is conducted by setting the temperature control program of a thermogravimetric analyzer. The temperature control program of the thermogravimetric analyzer is a heating range of 30~120°C, a heating rate of 5°C / minute, and is maintained at 120°C for no less than 10 minutes. The thermal weight loss data during the drying process is recorded.

[0019] Based on non-isothermal drying kinetic model Calculate the non-isothermal drying kinetic parameters of each tobacco raw material, especially the non-isothermal drying activation energy value. .in The relative moisture content means that... The ratio of the moisture content at time t to the initial moisture content can be calculated from the mass data of the thermogravimetric record sample. For the heating rate, and They are respectively The activation energy for non-isothermal drying can be calculated by using iterative fitting of the thermodynamic temperatures at time 1 and the initial time. .

[0020] Step S2, cluster analysis is used to determine the activation energy value of the non-isothermal drying process. Distance clustering was performed, and tobacco raw materials were classified into 3-4 groups based on Euclidean distance and Ward's linkage method. The groups were then categorized according to the activation energy value of non-isothermal drying. They are categorized from highest to lowest as groups Z1 to Zn.

[0021] Step S3: After the tobacco raw materials from step S1 are rehydrated, cut into shreds, and rolled into single-material cigarettes, a sensory evaluation group is organized to conduct a sensory quality evaluation of the raw materials and record the scores of each sensory quality index of the tobacco raw materials.

[0022] The sensory evaluation panel shall consist of no fewer than 7 members and shall have one group leader. The sensory quality indicators include 12 indicators, including aroma characteristics (aroma quality, aroma quantity, permeability, and off-flavors); smoke characteristics (concentration, strength, fineness, and cohesiveness); and taste characteristics (irritation, dryness, cleanliness, and sweetness). Each indicator shall be scored on a 9-point scale, with higher scores indicating better sensory quality.

[0023] Step S4: Based on the functional positioning of the formulation module, such as aroma and texture, smoke enrichment, and taste balance, and the sensory quality index values, and based on the principle of functional proximity of the sensory quality indexes of tobacco raw materials, this embodiment first describes the process by clustering the raw materials into 4 groups: For groups Z1 and Z2, tobacco leaves with a total score of at least 28 points in aroma characteristics among the sensory quality indicators are grouped into an aroma and flavor module, tobacco leaves with a total score of at least 28 points in smoke characteristics among the indicators are grouped into a smoke enrichment module, and the remaining tobacco leaves in the group are grouped into a taste balance module. Groups Z1 and Z2 are groups with higher non-isothermal drying activation energy values ​​E, and the overall quality of tobacco leaves in these groups is usually higher. Therefore, aroma, flavor, and smoke enrichment modules are mostly generated in these groups. When the average score of the four indicators of aroma or smoke characteristics is 7, it indicates that the tobacco leaves perform better in this functional characteristic. For groups Z3 and Z4, tobacco raw materials with a combined score of at least 48 points for aroma and smoke characteristics in the sensory quality indicators will be grouped into a concentration and permeability enhancement module, while the remaining tobacco raw materials in the group will be grouped into a taste improvement module. Groups Z3 and Z4 are groups with relatively low non-isothermal drying activation energy values ​​E, and the overall quality of tobacco leaves is inferior to that of groups Z1 and Z2. Therefore, in this group, the scores of the 8 indicators of aroma and smoke characteristics will be combined, and when the average score of each indicator is not less than 6 points, they will be merged into a concentration and permeability enhancement module, which is a functional module used to increase smoke concentration and aroma permeability. The proportion of tobacco raw materials used in each functional module is determined based on the mass ratio of the raw materials at the time of warehousing.

[0024] In this embodiment, there are also cases where the tobacco raw materials are classified into 3 groups by the cluster analysis in step S2, which are denoted as Z1 to Z3 respectively. The information of tobacco raw materials in each group is shown in Table 1.

[0025] Table 1. Clustering results of tobacco raw material information to be included in the formulation and their non-isothermal drying activation energy values.

[0026] Based on the above grouping results and the sensory quality index scores of the tobacco raw materials obtained in step S3, and according to the functional positioning of the formulation module, and based on the principle of functional proximity of the sensory quality indexes of the tobacco raw materials, the types of tobacco raw materials in each group with the target functional role are determined. The tobacco raw materials in each group are then combined in proportion to form the target functional formulation module for leaf threshing and re-drying processing. For groups Z1 and Z2, tobacco raw materials with a total score of aroma characteristic index of not less than 28 points are grouped into aroma and taste modules, tobacco raw materials with a total score of smoke characteristic index of not less than 28 points are grouped into smoke enrichment modules, and the remaining raw materials in the group are grouped into taste improvement modules. For group Z3, tobacco leaves with a combined score of at least 48 points for aroma and smoke characteristics were grouped into a flavor enhancement module, while the remaining tobacco leaves in the group were grouped into a taste balance module. Table 2 shows the types and proportions of tobacco leaves in each group that have the target function, as determined in this step.

[0027] Table 2 Raw material composition of the leaf-beating and re-drying function formulation module

[0028] To verify the effectiveness of the method in this embodiment, sensory quality evaluation and leaf re-drying processing were performed on the above representative functional formulation modules. The quality characteristics of each functional formulation module and the coefficient of variation of the moisture content index at the outlet of the re-drying machine are shown in Table 3. It can be seen that the functional positioning of each formulation module is clear, and the fluctuation of the outlet moisture content is lower than the average level of leaf re-drying formulation modules in previous years (average CV value of 2.32%).

[0029] Table 3 Sensory quality evaluation of representative modules and corresponding coefficient of variation of moisture content at the re-drying outlet.

[0030] The second embodiment of the present invention relates to a design system for a leaf re-drying formula module, referring to... Figure 2 The system includes The clustering index acquisition unit is used to acquire the clustering index of each tobacco leaf raw material to be entered into the formulation module. To improve the uniformity and consistency of moisture content during the tobacco leaf re-drying process, this embodiment sets the clustering index to the non-isothermal drying activation energy value. ; Cluster analysis grouping units, used based on the non-isothermal drying activation energy value Cluster analysis was used to divide the tobacco raw materials into several groups; The sensory quality evaluation unit is used to rehydrate, shred, and roll each tobacco leaf raw material into a single-material cigarette, organize a sensory evaluation group to conduct sensory quality evaluation, and obtain various sensory quality index values ​​of the tobacco leaf raw material. The formulation module design unit is used to determine the types of tobacco raw materials with target functions in each group based on the functional positioning of the formulation module and the sensory quality index values, and based on the principle of functional proximity of the sensory quality index of tobacco raw materials. Accordingly, the tobacco raw materials in each group are combined in proportion to form a target function formulation module for leaf threshing and re-drying processing.

[0031] In the above embodiments, the descriptions of each embodiment 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.

[0032] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is merely an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit. Furthermore, the specific names of the functional units and modules are only for easy differentiation and are not intended to limit the scope of protection of this application. The specific working process of the units and modules in the above system can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0033] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0034] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. 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 design method for a leaf re-roasting formula module, characterized in that: include Obtain the non-isothermal drying activation energy value of each tobacco raw material to be entered into the formulation module; Based on the non-isothermal drying activation energy value, the tobacco raw materials were divided into several groups through cluster analysis; Obtain the sensory quality index values ​​of single-material cigarettes made from each tobacco leaf raw material; Based on the functional positioning of the formulation module and the sensory quality index values, and based on the principle of functional proximity of the sensory quality index of tobacco raw materials, the tobacco raw materials in each group are proportionally combined into a target functional formulation module for leaf threshing and re-drying processing.

2. The design method of the leaf-re-drying formula module according to claim 1, characterized in that: The design method of the leaf-peeling and re-drying formula module specifically includes: S1 pulverizes and balances each tobacco leaf raw material to be included in the formulation module, conducts a non-isothermal drying experiment, records the thermogravimetric data during the drying process, and uses a non-isothermal drying kinetic model to calculate the non-isothermal drying kinetic parameters of each tobacco leaf raw material, including the non-isothermal drying activation energy value. ; S2 is based on the non-isothermal drying activation energy value. Cluster analysis was used to divide the tobacco raw materials into 3 to 4 groups; S3 involves rehydrating and shredding the tobacco leaves from S1, then rolling them into single-material cigarettes. A sensory evaluation team is then organized to conduct a sensory quality evaluation and obtain various sensory quality index values ​​for the tobacco leaves. S4, based on the functional positioning of the formulation module and the sensory quality index values, and based on the principle of functional proximity of the sensory quality index of tobacco raw materials, determines the types of tobacco raw materials in each group that have the target functional role, and combines the tobacco raw materials in each group in proportion to form the target functional formulation module for leaf threshing and re-drying processing.

3. The design method of the leaf-re-drying formula module according to claim 2, characterized in that: In step S1, after the tobacco raw material is crushed, the raw material with a particle size of 60-100 mesh is used as the object for non-isothermal drying experiment by setting the temperature control program of thermogravimetric analyzer. The equilibrium conditions are a temperature of 30℃ and a relative humidity of 70-80%. The temperature control program of thermogravimetric analyzer includes a heating range of 30-120℃, a heating rate of 2-5℃ / minute, and maintaining at 120℃ for no less than 10 minutes.

4. The design method of the leaf-re-drying formula module according to claim 2, characterized in that: In step S1, the non-isothermal drying kinetic model is: ,in The relative moisture content means that... The ratio of the moisture content at time t to the initial moisture content can be calculated from the mass data of the thermogravimetric record sample. For the heating rate, and They are respectively The activation energy for non-isothermal drying can be calculated by using iterative fitting of the thermodynamic temperatures at time 1 and the initial time. .

5. The design method of the leaf-re-drying formula module according to claim 2, characterized in that: In step S3, the sensory evaluation team shall consist of no fewer than 7 people and shall have one team leader. The sensory quality indicators include 12 indicators in total: aroma characteristics (aroma quality, aroma quantity, permeability, and off-flavors); smoke characteristics (concentration, strength, fineness, and cohesiveness); and taste characteristics (irritation, dryness, cleanliness, and sweetness). Each indicator shall be scored on a 9-point scale, with higher scores indicating better sensory quality indicators.

6. The design method of the leaf-re-drying formula module according to claim 2, characterized in that: Step S2 divides the tobacco raw materials into 3 groups through cluster analysis, according to the non-isothermal drying activation energy value. They are numbered Z1 to Z3 from highest to lowest; Step S4 is based on the functional proximity principle of sensory quality indicators of tobacco raw materials: For groups Z1 and Z2, tobacco raw materials with a total score of aroma characteristic index of not less than 28 points are grouped into aroma and taste modules, tobacco raw materials with a total score of smoke characteristic index of not less than 28 points are grouped into smoke enrichment modules, and the remaining raw materials in the group are grouped into taste improvement modules. For Group Z3, tobacco raw materials with a combined score of aroma and smoke characteristics of not less than 48 points are grouped into the concentration and penetration enhancement module, and the remaining tobacco raw materials in the group are grouped into the taste balance module. The proportion of tobacco raw materials used in each functional module is determined based on the mass ratio of the raw materials at the time of warehousing.

7. The design method of the leaf-re-drying formula module according to claim 2, characterized in that: Step S2 divides the tobacco raw materials into 4 groups through cluster analysis, according to the non-isothermal drying activation energy value. They are numbered Z1 to Z4 from highest to lowest; Step S4 is based on the functional proximity principle of sensory quality indicators of tobacco raw materials: For groups Z1 and Z2, tobacco raw materials with a total score of aroma characteristic index of no less than 28 points in the sensory quality index are grouped into aroma and taste module, tobacco raw materials with a total score of smoke characteristic index of no less than 28 points in the group are grouped into smoke enrichment module, and the remaining raw materials in the group are grouped into taste balance module. For groups Z3 and Z4, tobacco raw materials with a combined score of aroma and smoke characteristics in the sensory quality indicators of the group of not less than 48 points are grouped into the concentration and transparency enhancement module, and the remaining tobacco raw materials in the group are grouped into the taste improvement module. The proportion of tobacco raw materials used in each functional module is determined based on the mass ratio of the raw materials at the time of warehousing.

8. A design system for a leaf re-roasting formula module, characterized in that: The system is used to implement the steps of the design method for the leaf-drying and re-drying formula module according to any one of claims 1 to 7, which include: The clustering index acquisition unit is used to acquire the clustering index of each tobacco leaf raw material to be entered into the formulation module. To improve the uniformity and consistency of moisture content during the tobacco leaf re-drying process, this embodiment sets the clustering index to the non-isothermal drying activation energy value. ; Cluster analysis grouping units, used based on the non-isothermal drying activation energy value Cluster analysis was used to divide the tobacco raw materials into several groups; The sensory quality evaluation unit is used to rehydrate, shred, and roll each tobacco leaf raw material into a single-material cigarette, organize a sensory evaluation group to conduct sensory quality evaluation, and obtain various sensory quality index values ​​of the tobacco leaf raw material. The formulation module design unit is used to determine the types of tobacco raw materials with target functions in each group based on the functional positioning of the formulation module and the sensory quality index values, and based on the principle of functional proximity of the sensory quality index of tobacco raw materials. Accordingly, the tobacco raw materials in each group are combined in proportion to form a target function formulation module for leaf threshing and re-drying processing.

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