Tobacco lamina treatment method based on nicotine content classification

Abstract

The invention discloses a tobacco lamina treatment method based on nicotine content classification, which comprises the following steps: performing screening and two-stage shearing treatment on threshed mixed tobacco lamina materials through a two-stage roller screen, and then performing screening treatment through a three-stage flat screen, so as to treat large-size tobacco lamina into small tobacco lamina in a plurality of size intervals; and performing nicotine identification processing on the small tobacco laminae in the plurality of size intervals, and classifying the tobacco laminae in each size interval into high-nicotine-content tobacco laminae, middle-nicotine-content tobacco laminae and low-nicotine-content tobacco laminae according to a nicotine identification result. According to the tobacco lamina treatment method based on nicotine content classification, tobacco lamina can be distinguished again based on different nicotine contents, compared with a conventional redried finished product, the chemical component coordination and sensory quality can be improved, the tobacco lamina treatment method can be used for a high-grade formula through classification packaging, and the utilization efficiency of tobacco leaf raw materials is improved; high-nicotine, medium-nicotine and low-nicotine laminas can be packaged in a classified mode and used as different raw materials such as high-aroma low-impurity raw materials and strong-aroma micro-impurity raw materials in the module assembling process.

Description

Technical Field

[0001] The present invention relates to the technical field of threshing and redrying of tobacco leaves, and more specifically, to a method for processing cut tobacco classified based on nicotine content. Background Art

[0002] Threshing and redrying of tobacco leaves is the basis of cigarette cut tobacco production, which refers to a cigarette processing technology that separates tobacco leaves from stems and redries them to obtain a certain cut tobacco structure. The cut tobacco structure refers to the proportion of tobacco leaves of different sizes after threshing, and is an important index for evaluating the quality of cut tobacco and measuring the quality of threshing and redrying. At present, the cut tobacco after threshing is generally screened into 6 categories according to the sizes of >42mm×42mm (extra-large pieces), >25.4mm×25.4mm (large pieces), >12.7mm×12.7mm (medium pieces), >6.35mm×6.35mm (small pieces), >2.36mm×2.36mm (fragments), and <2.36mm×2.36mm (dust). Existing studies have shown that there are significant differences in the internal quality of cut tobacco of different sizes, and medium pieces are considered to have better quality. At the same time, since threshing breaks the whole tobacco leaves into several parts, there are still significant differences in the internal quality of different positions of the same tobacco leaf. That is to say, the quality of cut tobacco of the same size is still uneven and the uniformity is poor.

[0003] The main chemical component indexes and their contents of tobacco leaves play an important role in the quality identification of tobacco leaves. There are many main chemical components of tobacco leaves. Among them, nicotine content is one of the important factors characterizing the style characteristics of tobacco leaves. Nicotine, also known as nicotine, is a product of the secondary metabolism of tobacco and is the most important chemical component affecting the quality of tobacco leaves. Some studies have shown that nicotine has a highly significant correlation with reducing sugar, sugar-nicotine ratio, and nitrogen-nicotine ratio, while sugar-nicotine ratio and nitrogen-nicotine ratio are important indexes for considering the coordination of chemical components. The level of nicotine content has an important impact on the internal quality of tobacco leaves. Therefore, during the threshing and redrying process, it is necessary to further distinguish cut tobacco with different nicotine contents to improve the overall uniformity of the quality of cut tobacco, so as to provide a theoretical basis for the adjustment of the formula module of cigarette industrial enterprises.

[0004] Therefore, there is an urgent need for a method for processing cut tobacco classified based on nicotine content. Summary of the Invention

[0005] The purpose of the present invention is to provide a method for processing cut tobacco classified based on nicotine content to solve the above problems in the prior art and be able to further distinguish cut tobacco based on different nicotine contents.

[0006] The present invention provides a method for processing cut tobacco classified based on nicotine content, which includes:

[0007] The mixed cut tobacco material after threshing is screened by two-stage roller screens and processed by two-stage shearing, and then screened by three-stage flat screens, so as to process the large-sized cut tobacco into cut tobacco with smaller sheet types in multiple size ranges;

[0008] The cut tobacco with smaller sheet types in multiple size ranges is respectively subjected to nicotine identification treatment, so as to classify the cut tobacco in each size range into three categories of cut tobacco with high nicotine content, medium nicotine content and low nicotine content according to the nicotine identification results.

[0009] The cut tobacco processing method classified based on nicotine content as described above, wherein, preferably, the mixed cut tobacco material includes cut tobacco with a size larger than 42mm×42mm, cut tobacco with a size larger than 25.4mm×25.4, cut tobacco with a size larger than 12.7mm×12.7mm, cut tobacco with a size larger than 6.35mm×6.35mm and cut tobacco with a size larger than 2.36mm×2.36mm,

[0010] The step of screening the mixed cut tobacco material after threshing by two-stage roller screens and processing by two-stage shearing, and then screening by three-stage flat screens, so as to process the large-sized cut tobacco into cut tobacco with smaller sheet types in multiple size ranges, specifically includes:

[0011] The mixed cut tobacco material after threshing is screened by two-stage roller screens and processed by two-stage shearing, and then screened by three-stage flat screens, so as to process the cut tobacco with a size larger than 42mm×42mm and the cut tobacco with a size larger than 25.4mm×25.4mm into smaller sheet types with a size larger than 12.7mm×12.7mm, a size larger than 6.35mm×6.35mm, a size larger than 2.36mm×2.36mm and a size smaller than 2.36mm×2.36m.

[0012] The cut tobacco processing method classified based on nicotine content as described above, wherein, preferably, the step of screening the mixed cut tobacco material after threshing by two-stage roller screens and processing by two-stage shearing, and then screening by three-stage flat screens, so as to process the cut tobacco with a size larger than 42mm×42mm and the cut tobacco with a size larger than 25.4mm×25.4mm into smaller sheet types with a size larger than 12.7mm×12.7mm, a size larger than 6.35mm×6.35mm, a size larger than 2.36mm×2.36mm and a size smaller than 2.36mm×2.36mm, specifically includes:

[0013] After the mixed cut tobacco material after threshing is processed by the first-stage roller screen, the cut tobacco with a size larger than 42mm×42mm enters the first-stage shearing device located below the side edge of the first-stage roller screen for first-stage flexible shearing treatment, and the cut tobacco of the remaining sizes and the cut tobacco passing through the first-stage shearing device enter the second-stage roller screen located below the first-stage roller screen;

[0014] After passing through the second-stage roller screen, the cut tobacco with a size larger than 25.4 mm × 25.4 mm enters the second-stage shearing device located below the other edge of the second-stage roller screen for second-stage flexible shearing treatment, and the cut tobacco with the remaining sizes and the cut tobacco passing through the second-stage shearing device enter the three-stage flat screen located below the second-stage roller screen;

[0015] On the three-stage flat screen, the cut tobacco is screened into smaller cut tobacco types with sizes larger than 12.7 mm × 12.7 mm, larger than 6.35 mm × 6.35 mm, larger than 2.36 mm × 2.36 mm, and smaller than 2.36 mm × 2.36 mm.

[0016] The cut tobacco processing method based on nicotine content classification as described above, wherein, preferably, on the three-stage flat screen, the cut tobacco is screened into smaller cut tobacco types with sizes larger than 12.7 mm × 12.7 mm, larger than 6.35 mm × 6.35 mm, larger than 2.36 mm × 2.36 mm, and smaller than 2.36 mm × 2.36 mm, specifically including:

[0017] After passing through the first-stage flat screen located below the second-stage roller screen and the second-stage shearing device, the cut tobacco with a size larger than 12.7 mm × 12.7 mm advances along the first-stage flat screen, and the cut tobacco with the remaining sizes enters the second-stage flat screen located below the first-stage flat screen;

[0018] After passing through the second-stage flat screen, the cut tobacco with a size larger than 6.35 mm × 6.35 mm advances along the second-stage flat screen, and the cut tobacco with the remaining sizes enters the third-stage flat screen located below the second-stage flat screen;

[0019] After passing through the third-stage flat screen, the cut tobacco with a size larger than 2.36 mm × 2.36 mm advances along the third-stage flat screen, and the cut tobacco with a size smaller than 2.36 mm × 2.36 mm is collected below the third-stage flat screen.

[0020] The cut tobacco processing method based on nicotine content classification as described above, wherein, preferably, the smaller cut tobacco types in multiple size ranges are respectively subjected to nicotine identification processing to classify the cut tobacco in each size range into three categories of cut tobacco with high nicotine content, medium nicotine content, and low nicotine content according to the nicotine identification results, specifically including:

[0021] The smaller cut tobacco types with sizes larger than 12.7 mm × 12.7 mm, larger than 6.35 mm × 6.35 mm, and larger than 2.36 mm × 2.36 mm are respectively subjected to nicotine identification processing to classify the cut tobacco in each size into three categories of cut tobacco with high nicotine content, medium nicotine content, and low nicotine content according to the nicotine identification results.

[0022] The cut tobacco processing method based on nicotine content classification as described above. Preferably, after nicotine identification and classification processing, the cut tobacco is divided into 10 categories, namely: high-nicotine-content cut tobacco with a size greater than 12.7 mm × 12.7 mm, medium-nicotine-content cut tobacco with a size greater than 12.7 mm × 12.7 mm, low-nicotine-content cut tobacco with a size greater than 12.7 mm × 12.7 mm, high-nicotine-content cut tobacco with a size greater than 6.35 mm × 6.35 mm, medium-nicotine-content cut tobacco with a size greater than 6.35 mm × 6.35 mm, low-nicotine-content cut tobacco with a size greater than 6.35 mm × 6.35 mm, high-nicotine-content cut tobacco with a size greater than 2.36 mm × 2.36 mm, medium-nicotine-content cut tobacco with a size greater than 2.36 mm × 2.36 mm, low-nicotine-content cut tobacco with a size greater than 2.36 mm × 2.36 mm, and cut tobacco with a size less than 2.36 mm × 2.36 mm.

[0023] The cut tobacco processing method based on nicotine content classification as described above. Preferably, the cut tobacco with a smaller flake type having a size greater than 12.7 mm × 12.7 mm, a size greater than 6.35 mm × 6.35 mm, and a size greater than 2.36 mm × 2.36 mm is respectively subjected to nicotine identification processing, so as to classify the cut tobacco of each size into three categories of high-nicotine-content, medium-nicotine-content, and low-nicotine-content cut tobacco according to the nicotine identification results. Specifically, it includes:

[0024] The cut tobacco with a size greater than 12.7 mm × 12.7 mm advancing along the first-stage flat screen passes through the first nicotine identification and classification device at the rear end of the first-stage flat screen, and the cut tobacco with a size greater than 12.7 mm × 12.7 mm is divided into three categories of high-nicotine-content, medium-nicotine-content, and low-nicotine-content cut tobacco;

[0025] The cut tobacco with a size greater than 6.35 mm × 6.35 mm advancing along the second-stage flat screen passes through the second nicotine identification and classification device at the rear end of the second-stage flat screen, and the cut tobacco with a size greater than 6.35 mm × 6.35 mm is divided into three categories of high-nicotine-content, medium-nicotine-content, and low-nicotine-content cut tobacco;

[0026] The cut tobacco with a size greater than 2.36 mm × 2.36 mm advancing along the third-stage flat screen passes through the third nicotine identification and classification device at the rear end of the third-stage flat screen, and the cut tobacco with a size greater than 2.36 mm × 2.36 mm is divided into three categories of high-nicotine-content, medium-nicotine-content, and low-nicotine-content cut tobacco.

[0027] The cut tobacco processing method based on nicotine content classification as described above, wherein, preferably, the first nicotine identification and classification device, the second nicotine identification and classification device, and the third nicotine identification and classification device respectively include: a thinning area and a nicotine identification area arranged in sequence. On one side of the rear end of the nicotine identification area, a high-nicotine conveyor belt is arranged along an inclined direction. A high-nicotine sensor is arranged at the connection between the high-nicotine conveyor belt and the nicotine identification area. On the other side of the rear end of the nicotine identification area, a low-nicotine conveyor belt is arranged along an inclined direction. A low-nicotine sensor is arranged at the connection between the low-nicotine conveyor belt and the nicotine identification area. A medium-nicotine conveyor belt is arranged at the end of the nicotine identification area.

[0028] The cut tobacco processing method based on nicotine content classification as described above, wherein, preferably, both the high-nicotine conveyor belt and the low-nicotine conveyor belt are inclined towards the medium-nicotine conveyor belt, and the high-nicotine conveyor belt and the low-nicotine conveyor belt are symmetrically distributed with respect to the medium-nicotine conveyor belt.

[0029] The cut tobacco processing method based on nicotine content classification as described above, wherein, preferably, the nicotine identification area uses a nicotine identification sensor for nicotine identification.

[0030] The first nicotine identification and classification device, the second nicotine identification and classification device, and the third nicotine identification and classification device also respectively include: a controller, and the controller is specifically used for:

[0031] If it is detected in the nicotine identification area that the nicotine content of the cut tobacco is greater than 3.5%, then start the high-nicotine sensor and blow the high-nicotine cut tobacco onto the high-nicotine conveyor belt;

[0032] If it is detected in the nicotine identification area that the nicotine content of the cut tobacco is less than 2.0%, then start the low-nicotine sensor and blow the low-nicotine cut tobacco onto the low-nicotine conveyor belt;

[0033] If it is detected in the nicotine identification area that the nicotine content of the cut tobacco is between 2.0% and 3.5%, the cut tobacco is transported out of the corresponding nicotine identification and classification device through the medium-nicotine conveyor belt.

[0034] The present invention provides a method for processing cut tobacco classified based on nicotine content. First, large-sized cut tobacco is processed into cut tobacco with smaller sheet types in multiple size ranges; then, according to the nicotine recognition results, the cut tobacco with smaller sheet types in each size range is respectively classified into three categories of cut tobacco with high nicotine content, medium nicotine content, and low nicotine content. It can further distinguish cut tobacco based on different nicotine contents. Compared with conventional re-dried finished products, it can improve the coordination of chemical components and sensory quality. After classification and packing, it can be used in higher-grade formulations, improving the utilization efficiency of tobacco leaf raw materials, which has good practical significance; it can also classify and pack high, medium, and low nicotine cut tobacco and use them as different raw materials such as high-aroma and low-impurity, strong-aroma and slightly-impurity when module-assembling. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described below in conjunction with the accompanying drawings, where:

[0036] Figure 1 is a flowchart of an embodiment of the method for processing cut tobacco classified based on nicotine content provided by the present invention;

[0037] Figure 2 is a schematic diagram of the working principle of an embodiment of the method for processing cut tobacco classified based on nicotine content provided by the present invention;

[0038] Figure 3 is a schematic diagram of the structures of the first nicotine recognition and classification device, the second nicotine recognition and classification device, and the third nicotine recognition and classification device.

[0039] Description of the reference numerals: 1 - first-stage roller screen, 2 - first-stage shearing device, 3 - second-stage roller screen, 4 - second-stage shearing device, 5 - first-stage flat screen, 6 - second-stage flat screen, 7 - third-stage flat screen, 8 - first nicotine recognition and classification device, 9 - second nicotine recognition and classification device, 10 - third nicotine recognition and classification device, 11 - spreading area, 12 - nicotine recognition area, 13 - high-nicotine conveying belt, 14 - high-nicotine sensor, 15 - low-nicotine conveying belt, 16 - low-nicotine sensor, 17 - medium-nicotine conveying belt, 18 - nicotine recognition sensor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0040] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and in no way limits the present disclosure and its application or use. The present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present disclosure thorough and complete and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that: unless otherwise specifically stated, the relative arrangements of components and steps, the compositions of materials, numerical expressions, and numerical values set forth in these embodiments should be construed as merely exemplary and not as limitations.

[0041] As used in this disclosure, "first", "second", and similar terms do not denote any order, quantity, or importance, but are merely used to distinguish different parts. Terms such as "including" or "comprising" mean that the elements before the term cover the elements listed after the term, and do not exclude the possibility of also covering other elements. Terms such as "upper" and "lower" are only used to indicate relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0042] In this disclosure, when it is described that a specific component is located between a first component and a second component, there may or may not be an intermediate component between the specific component and the first component or the second component. When it is described that a specific component is connected to other components, the specific component may be directly connected to the other components without an intermediate component, or may not be directly connected to the other components and have an intermediate component.

[0043] All terms used in this disclosure (including technical terms or scientific terms) have the same meaning as understood by those of ordinary skill in the art to which this disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in a general dictionary, for example, should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and should not be interpreted in an idealized or overly formal sense, unless specifically defined as such here.

[0044] Techniques, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods, and devices should be regarded as part of the specification.

[0045] As Figure 1 and Figure 2 shown, in the actual implementation process of the cut tobacco processing method based on nicotine content classification provided in this embodiment, it specifically includes the following steps:

[0046] Step S1: After the mixed cut tobacco material after threshing is screened by two-stage roller screens and subjected to two-stage shearing treatment, it is then screened by three-stage flat screens to process large-sized cut tobacco into cut tobacco of smaller sheet types in multiple size ranges.

[0047] Among them, the mixed cut tobacco material includes cut tobacco with a size greater than 42 mm × 42 mm, cut tobacco with a size greater than 25.4 mm × 25.4, cut tobacco with a size greater than 12.7 mm × 12.7 mm, cut tobacco with a size greater than 6.35 mm × 6.35 mm, and cut tobacco with a size greater than 2.36 mm × 2.36 mm.

[0048] Specifically, the mixed cut tobacco materials after threshing are screened by two - stage roller screens and subjected to two - stage shearing treatment, and then screened by three - stage flat screens, so as to process cut tobacco with dimensions greater than 42mm×42mm and dimensions greater than 25.4mm×25.4mm into smaller cut tobacco forms with dimensions greater than 12.7mm×12.7mm, dimensions greater than 6.35mm×6.35mm, dimensions greater than 2.36mm×2.36mm, and dimensions less than 2.36mm×2.36mm.

[0049] In an embodiment of the cut tobacco processing method based on nicotine content classification of the present invention, step S1 may specifically include:

[0050] Step S11: After the mixed cut tobacco materials after threshing are processed by the first - stage roller screen 1, the cut tobacco with dimensions greater than 42mm×42mm enters the first - stage shearing device 2 located below one - side edge of the first - stage roller screen 1 for the first - stage flexible shearing treatment, and the cut tobacco of the remaining dimensions and the cut tobacco passing through the first - stage shearing device 2 enter the second - stage roller screen 3 located below the first - stage roller screen 1.

[0051] Step S12: After passing through the second - stage roller screen 3, the cut tobacco with dimensions greater than 25.4mm×25.4mm enters the second - stage shearing device 4 located below the other - side edge of the second - stage roller screen 3 for the second - stage flexible shearing treatment, and the cut tobacco of the remaining dimensions and the cut tobacco passing through the second - stage shearing device 4 enter the three - stage flat screen located below the second - stage roller screen 3.

[0052] Step S13: On the three - stage flat screen, the cut tobacco is screened into smaller cut tobacco forms with dimensions greater than 12.7mm×12.7mm, dimensions greater than 6.35mm×6.35mm, dimensions greater than 2.36mm×2.36mm, and dimensions less than 2.36mm×2.36mm.

[0053] In an embodiment of the cut tobacco processing method based on nicotine content classification of the present invention, step S13 may specifically include:

[0054] Step S131: After passing through the first - stage flat screen 5 located below the second - stage roller screen 3 and the second - stage shearing device 4, the cut tobacco with dimensions greater than 12.7mm×12.7mm advances along the first - stage flat screen 5, and the cut tobacco of the remaining dimensions enters the second - stage flat screen 6 located below the first - stage flat screen 5.

[0055] Step S132: After passing through the second - stage flat screen 6, the cut tobacco with dimensions greater than 6.35mm×6.35mm advances along the second - stage flat screen 6, and the cut tobacco of the remaining dimensions enters the third - stage flat screen 7 located below the second - stage flat screen 6.

[0056] Step S133: After passing through the third-stage flat screen 7, the cut tobacco with a size larger than 2.36 mm × 2.36 mm advances along the third-stage flat screen 7, and the cut tobacco with a size smaller than 2.36 mm × 2.36 mm is collected below the third-stage flat screen 7.

[0057] Step S2: The cut tobacco with a smaller flake type in multiple size ranges is respectively subjected to nicotine identification processing, so as to classify the cut tobacco in each size range into three categories of cut tobacco with high nicotine content, medium nicotine content, and low nicotine content according to the nicotine identification results.

[0058] Specifically, the cut tobacco with a smaller flake type with a size larger than 12.7 mm × 12.7 mm, a size larger than 6.35 mm × 6.35 mm, and a size larger than 2.36 mm × 2.36 mm is respectively subjected to nicotine identification processing, so as to classify the cut tobacco in each size into three categories of cut tobacco with high nicotine content, medium nicotine content, and low nicotine content according to the nicotine identification results.

[0059] In the present invention, after nicotine identification and classification processing, the cut tobacco is divided into 10 categories, namely: cut tobacco with high nicotine content with a size larger than 12.7 mm × 12.7 mm, cut tobacco with medium nicotine content with a size larger than 12.7 mm × 12.7 mm, cut tobacco with low nicotine content with a size larger than 12.7 mm × 12.7 mm, cut tobacco with high nicotine content with a size larger than 6.35 mm × 6.35 mm, cut tobacco with medium nicotine content with a size larger than 6.35 mm × 6.35 mm, cut tobacco with low nicotine content with a size larger than 6.35 mm × 6.35 mm, cut tobacco with high nicotine content with a size larger than 2.36 mm × 2.36 mm, cut tobacco with medium nicotine content with a size larger than 2.36 mm × 2.36 mm, cut tobacco with low nicotine content with a size larger than 2.36 mm × 2.36 mm, and cut tobacco with a size smaller than 2.36 mm × 2.36 mm.

[0060] In an implementation manner of the cut tobacco processing method based on nicotine content classification in the present invention, step S2 may specifically include:

[0061] Step S21: The cut tobacco with a size larger than 12.7 mm × 12.7 mm advancing along the first-stage flat screen 5 passes through the first nicotine identification and classification device 8 at the rear end of the first-stage flat screen 5, and the cut tobacco with a size larger than 12.7 mm × 12.7 mm is divided into three categories of cut tobacco with high nicotine content, medium nicotine content, and low nicotine content.

[0062] Step S22: The cut tobacco with a size larger than 6.35 mm × 6.35 mm advancing along the second-stage flat screen 6 passes through the second nicotine identification and classification device 9 at the rear end of the second-stage flat screen 6, and the cut tobacco with a size larger than 6.35 mm × 6.35 mm is divided into three categories of cut tobacco with high nicotine content, medium nicotine content, and low nicotine content.

[0063] Step S23: The cut tobacco with a size larger than 2.36 mm × 2.36 mm advancing along the third-stage flat screen 7 passes through the third nicotine identification and classification device 10 at the rear end of the third-stage flat screen 7, and the cut tobacco with a size larger than 2.36 mm × 2.36 mm is classified into three categories of cut tobacco with high nicotine content, medium nicotine content, and low nicotine content.

[0064] Among them, as Figure 3 shown, the first nicotine identification and classification device 8, the second nicotine identification and classification device 9, and the third nicotine identification and classification device 10 respectively include: a thinning area 11 and a nicotine identification area 12 arranged in sequence. A high-nicotine conveyor belt 13 is arranged along an inclined direction on one side of the rear end of the nicotine identification area 12. A high-nicotine sensor 14 is arranged at the connection between the high-nicotine conveyor belt 13 and the nicotine identification area 12. A low-nicotine conveyor belt 15 is arranged along an inclined direction on the other side of the rear end of the nicotine identification area 12. A low-nicotine sensor 16 is arranged at the connection between the low-nicotine conveyor belt 15 and the nicotine identification area 12. A medium-nicotine conveyor belt 17 is arranged at the end of the nicotine identification area 12.

[0065] As Figure 3 shown, both the high-nicotine conveyor belt 13 and the low-nicotine conveyor belt 15 are inclined towards the medium-nicotine conveyor belt 17, and the high-nicotine conveyor belt 13 and the low-nicotine conveyor belt 15 are symmetrically distributed with respect to the medium-nicotine conveyor belt 17.

[0066] Furthermore, the nicotine identification area 12 uses a nicotine identification sensor 18 to identify nicotine. In an embodiment of the present invention, the nicotine identification sensor 18 includes a near-infrared probe.

[0067] Even further, the first nicotine identification and classification device 8, the second nicotine identification and classification device 9, and the third nicotine identification and classification device 10 respectively further include: a controller, and the controller is specifically used for:

[0068] If it is detected in the nicotine identification area 12 that the nicotine content of the cut tobacco is greater than 3.5%, the high-nicotine sensor 14 is started, and the high-nicotine cut tobacco is blown into the high-nicotine conveyor belt 13 and enters the next process;

[0069] If it is detected in the nicotine identification area 12 that the nicotine content of the cut tobacco is less than 2.0%, the low-nicotine sensor 16 is started, and the low-nicotine cut tobacco is blown into the low-nicotine conveyor belt 15 and enters the next process;

[0070] When the nicotine content of the cut tobacco is detected in the nicotine recognition area 12 to be between 2.0% and 3.5%, the cut tobacco is transported out of the corresponding nicotine recognition and classification device through the medium nicotine conveyor belt 17 and enters the next process.

[0071] Among them, the nicotine recognition and classification device here refers to the first nicotine recognition and classification device 8, the second nicotine recognition and classification device 9 or the third nicotine recognition and classification device 10, and the nicotine determination values are shown in Table 1.

[0072] Table 1 Nicotine determination values

[0073]

[0074] In an embodiment of the present invention, the cut tobacco processing method based on nicotine content classification further includes:

[0075] Step S3: Select the internal quality indicators that have a greater impact on the quality of the cut tobacco for verification.

[0076] In an embodiment of the present invention, 20,000 dan of tobacco leaf modules from a certain origin in 2023 are selected. Among them, 10,000 dan are subjected to conventional threshing and redrying, and the finished product is denoted as Q. The other 10,000 dan are processed according to steps S1 - S2 of the present invention, and respectively obtain cut tobacco with a high nicotine content having a size greater than 12.7 mm × 12.7 mm (denoted as A), cut tobacco with a medium nicotine content having a size greater than 12.7 mm × 12.7 mm (denoted as B), cut tobacco with a low nicotine content having a size greater than 12.7 mm × 12.7 mm (denoted as C), cut tobacco with a high nicotine content having a size greater than 6.35 mm × 6.35 mm (denoted as D), cut tobacco with a medium nicotine content having a size greater than 6.35 mm × 6.35 mm (denoted as E), cut tobacco with a low nicotine content having a size greater than 6.35 mm × 6.35 mm (denoted as F), cut tobacco with a high nicotine content having a size greater than 2.36 mm × 2.36 mm (denoted as G), cut tobacco with a medium nicotine content having a size greater than 2.36 mm × 2.36 mm (denoted as H), cut tobacco with a low nicotine content having a size greater than 2.36 mm × 2.36 mm (denoted as I), and cut tobacco having a size less than 2.36 mm × 2.36 mm (denoted as J). Nine categories of A, B, C, D, E, F, G, H, and I are selected for comparison. Specifically, the conventional redrying finished product and the cut tobacco finished products grouped by nicotine content (A - I) after being processed according to steps S1 - S2 of the present invention are respectively detected to determine the differences in their chemical components and sensory qualities. The indicators that have a greater impact on the quality of cut tobacco are selected for comparative analysis. The test results are shown in Table 2. It can be seen that category B, that is, the cut tobacco with a medium nicotine content having a size greater than 12.7 mm × 12.7 mm, has a higher sugar - nitrogen ratio, two - sugar ratio, aroma quality, aroma quantity, concentration, and less foreign odor than others, and shows the best performance in terms of the coordination of chemical components and sensory quality. Compared with the conventional redrying processed finished product Q, the five sizes of category A, category B, category C, category D, and category E are all superior to the conventional processing. Among them, category B is the best, followed by category A, category C, and category E, and category D is the next. These five types of cut tobacco are better than the conventional redrying finished product in terms of the coordination of chemical components and sensory quality. After being classified and packed, they can be used for a higher - grade formula, improving the utilization efficiency of tobacco leaf raw materials, and having good practical significance; they can also be classified and packed according to high, medium, and low nicotine cut tobacco, and used as different raw materials such as "high - aroma and low - foreign - odor" and "rich - aroma and slightly - foreign - odor" respectively during module assembly.

[0077] Table 2 Internal Quality of Finished Products

[0078]

[0079] The method for processing cut tobacco classified based on nicotine content provided by the embodiments of the present invention first processes large-sized cut tobacco into cut tobacco with smaller sheet types in multiple size ranges; then classifies the cut tobacco with smaller sheet types in each size range into three categories of cut tobacco with high nicotine content, medium nicotine content, and low nicotine content according to the nicotine recognition results. It can further distinguish cut tobacco based on different nicotine contents. Compared with conventional re-dried finished products, it can improve the coordination of chemical components and sensory quality. After classification and packaging, it can be used in higher-grade formulations, improving the utilization efficiency of tobacco leaf raw materials, which has good practical significance; it can also classify and package high, medium, and low nicotine cut tobacco and use them as different raw materials such as high-aroma and low-impurity, strong-aroma and slightly-impurity respectively during module assembly.

[0080] Thus far, the embodiments of the present disclosure have been described in detail. To avoid obscuring the concept of the present disclosure, some details known in the art have not been described. Those skilled in the art can clearly understand how to implement the technical solutions disclosed herein based on the above description.

[0081] Although some specific embodiments of the present disclosure have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and not for limiting the scope of the present disclosure. Those skilled in the art should understand that the above embodiments can be modified or partial technical features can be equivalently replaced without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims

1. A method for processing cut tobacco classified based on nicotine content, characterized in that, Including: Subjecting the mixed cut tobacco materials after leaf threshing to two-stage roller screen screening, two-stage shearing treatment, and then three-stage flat screen screening treatment to process large-sized cut tobacco into cut tobacco with smaller sheet types in multiple size ranges; Subjecting the cut tobacco with smaller sheet types in multiple size ranges to nicotine identification treatment respectively to classify the cut tobacco in each size range into three categories of cut tobacco with high nicotine content, medium nicotine content, and low nicotine content according to the nicotine identification results.

2. The cut tobacco processing method based on nicotine content classification according to claim 1, characterized in that The mixed cut tobacco materials include cut tobacco with a size larger than 42mm×42mm, cut tobacco with a size larger than 25.4mm×25.4, cut tobacco with a size larger than 12.7mm×12.7mm, cut tobacco with a size larger than 6.35mm×6.35mm, and cut tobacco with a size larger than 2.36mm×2.36mm. The step of subjecting the mixed cut tobacco materials after leaf threshing to two-stage roller screen screening, two-stage shearing treatment, and then three-stage flat screen screening treatment to process large-sized cut tobacco into cut tobacco with smaller sheet types in multiple size ranges specifically includes: Subjecting the mixed cut tobacco materials after leaf threshing to two-stage roller screen screening, two-stage shearing treatment, and then three-stage flat screen screening treatment to process the cut tobacco with a size larger than 42mm×42mm and the cut tobacco with a size larger than 25.4mm×25.4mm into smaller sheet types with a size larger than 12.7mm×12.7mm, a size larger than 6.35mm×6.35mm, a size larger than 2.36mm×2.36mm, and a size smaller than 2.36mm×2.36m.

3. The cut tobacco processing method based on nicotine content classification according to claim 2, characterized in that, The step of subjecting the mixed cut tobacco materials after leaf threshing to two-stage roller screen screening, two-stage shearing treatment, and then three-stage flat screen screening treatment to process the cut tobacco with a size larger than 42mm×42mm and the cut tobacco with a size larger than 25.4mm×25.4mm into smaller sheet types with a size larger than 12.7mm×12.7mm, a size larger than 6.35mm×6.35mm, a size larger than 2.36mm×2.36mm, and a size smaller than 2.36mm×2.36mm specifically includes: After the mixed cut tobacco materials after leaf threshing pass through the first-stage roller screen, the cut tobacco with a size larger than 42mm×42mm enters the first-stage shearing device located below one side edge of the first-stage roller screen for first-stage flexible shearing treatment, and the cut tobacco of the remaining sizes and the cut tobacco passing through the first-stage shearing device enter the second-stage roller screen located below the first-stage roller screen; After passing through the second-stage roller screen, the cut tobacco with a size larger than 25.4mm×25.4mm enters the second-stage shearing device located below the other side edge of the second-stage roller screen for second-stage flexible shearing treatment, and the cut tobacco of the remaining sizes and the cut tobacco passing through the second-stage shearing device enter the three-stage flat screen located below the second-stage roller screen; On the three-stage flat screen, the cut tobacco is screened into smaller sheet types with a size larger than 12.7mm×12.7mm, a size larger than 6.35mm×6.35mm, a size larger than 2.36mm×2.36mm, and a size smaller than 2.36mm×2.36mm.

4. The cut tobacco processing method based on nicotine content classification according to claim 3, characterized in that, On the three - stage flat screen, cut the tobacco leaves into smaller leaf types with sizes larger than 12.7 mm×12.7 mm, larger than 6.35 mm×6.35 mm, larger than 2.36 mm×2.36 mm, and smaller than 2.36 mm×2.36 mm, specifically including: After passing through the first - stage flat screen located below the second - stage roller screen and the second - stage shearing device, the tobacco leaves with sizes larger than 12.7 mm×12.7 mm move forward along the first - stage flat screen, and the tobacco leaves of the remaining sizes enter the second - stage flat screen located below the first - stage flat screen; After passing through the second - stage flat screen, the tobacco leaves with sizes larger than 6.35 mm×6.35 mm move forward along the second - stage flat screen, and the tobacco leaves of the remaining sizes enter the third - stage flat screen located below the second - stage flat screen; After passing through the third - stage flat screen, the tobacco leaves with sizes larger than 2.36 mm×2.36 mm move forward along the third - stage flat screen, and the tobacco leaves with sizes smaller than 2.36 mm×2.36 mm are collected below the third - stage flat screen.

5. The cut tobacco processing method based on classification by nicotine content according to claim 4, characterized in that, Specifically include: separately subject the tobacco leaves of smaller leaf types in multiple size ranges to nicotine identification processing, so as to classify the tobacco leaves in each size range into three categories of tobacco leaves with high nicotine content, medium nicotine content, and low nicotine content according to the nicotine identification results; Separate the tobacco leaves of smaller leaf types with sizes larger than 12.7 mm×12.7 mm, larger than 6.35 mm×6.35 mm, and larger than 2.36 mm×2.36 mm to undergo nicotine identification processing respectively, so as to classify the tobacco leaves of each size into three categories of tobacco leaves with high nicotine content, medium nicotine content, and low nicotine content according to the nicotine identification results.

6. The cut tobacco processing method based on nicotine content classification according to claim 5, characterized in that, After nicotine identification and classification processing, the tobacco leaves are divided into 10 categories, namely: tobacco leaves with high nicotine content with sizes larger than 12.7 mm×12.7 mm, tobacco leaves with medium nicotine content with sizes larger than 12.7 mm×12.7 mm, tobacco leaves with low nicotine content with sizes larger than 12.7 mm×12.7 mm, tobacco leaves with high nicotine content with sizes larger than 6.35 mm×6.35 mm, tobacco leaves with medium nicotine content with sizes larger than 6.35 mm×6.35 mm, tobacco leaves with low nicotine content with sizes larger than 6.35 mm×6.35 mm, tobacco leaves with high nicotine content with sizes larger than 2.36 mm×2.36 mm, tobacco leaves with medium nicotine content with sizes larger than 2.36 mm×2.36 mm, tobacco leaves with low nicotine content with sizes larger than 2.36 mm×2.36 mm, and tobacco leaves with sizes smaller than 2.36 mm×2.36 mm.

7. The method for processing cut tobacco classified based on nicotine content according to claim 5, characterized in that, Specifically include: separately subject the tobacco leaves of smaller leaf types with sizes larger than 12.7 mm×12.7 mm, larger than 6.35 mm×6.35 mm, and larger than 2.36 mm×2.36 mm to undergo nicotine identification processing respectively, so as to classify the tobacco leaves of each size into three categories of tobacco leaves with high nicotine content, medium nicotine content, and low nicotine content according to the nicotine identification results; The cut tobacco with a size larger than 12.7 mm × 12.7 mm advancing along the first-stage flat screen passes through the first nicotine identification and classification device at the rear end of the first-stage flat screen, and the cut tobacco with a size larger than 12.7 mm × 12.7 mm is divided into three categories of cut tobacco with high nicotine content, medium nicotine content, and low nicotine content; The cut tobacco with a size larger than 6.35 mm × 6.35 mm advancing along the second-stage flat screen passes through the second nicotine identification and classification device at the rear end of the second-stage flat screen, and the cut tobacco with a size larger than 6.35 mm × 6.35 mm is divided into three categories of cut tobacco with high nicotine content, medium nicotine content, and low nicotine content; The cut tobacco with a size larger than 2.36 mm × 2.36 mm advancing along the third-stage flat screen passes through the third nicotine identification and classification device at the rear end of the third-stage flat screen, and the cut tobacco with a size larger than 2.36 mm × 2.36 mm is divided into three categories of cut tobacco with high nicotine content, medium nicotine content, and low nicotine content.

8. The cut tobacco processing method based on classification by nicotine content according to claim 7, characterized in that, The first nicotine identification and classification device, the second nicotine identification and classification device, and the third nicotine identification and classification device respectively include: a thinning area and a nicotine identification area arranged in sequence. A high-nicotine conveyor belt is arranged along an inclined direction on one side of the rear end of the nicotine identification area. A high-nicotine sensor is arranged at the connection between the high-nicotine conveyor belt and the nicotine identification area. A low-nicotine conveyor belt is arranged along an inclined direction on the other side of the rear end of the nicotine identification area. A low-nicotine sensor is arranged at the connection between the low-nicotine conveyor belt and the nicotine identification area. A medium-nicotine conveyor belt is arranged at the end of the nicotine identification area.

9. The method for treating cut tobacco classified based on nicotine content according to claim 8, wherein Both the high-nicotine conveyor belt and the low-nicotine conveyor belt are inclined towards the direction of the medium-nicotine conveyor belt, and the high-nicotine conveyor belt and the low-nicotine conveyor belt are symmetrically distributed with respect to the medium-nicotine conveyor belt.

10. The cut tobacco processing method based on nicotine content classification according to claim 8, wherein The nicotine identification area uses a nicotine identification sensor to identify nicotine, The first nicotine identification and classification device, the second nicotine identification and classification device, and the third nicotine identification and classification device also respectively include: a controller, and the controller is specifically used for: If it is detected in the nicotine identification area that the nicotine content of the cut tobacco is greater than 3.5%, then start the high-nicotine sensor and blow the high-nicotine cut tobacco into the high-nicotine conveyor belt; If it is detected in the nicotine identification area that the nicotine content of the cut tobacco is less than 2.0%, then start the low-nicotine sensor and blow the low-nicotine cut tobacco into the low-nicotine conveyor belt; If it is detected in the nicotine identification area that the nicotine content of the cut tobacco is between 2.0% and 3.5%, the cut tobacco is transported out of the corresponding nicotine identification and classification device through the medium-nicotine conveyor belt.

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