Method and system for reducing the impact of loose reconditioning outlet moisture on sheet tobacco

Abstract

The application discloses a method and system for reducing the influence of sheet tobacco on the standard deviation of loose moisture recovery outlet moisture, the method comprising: a conventional tobacco production line conveying conventional tobacco to a loose moisture recovery production line; after the outlet moisture of the conventional tobacco in the cylinder of the loose moisture recovery machine is stabilized within a set range, starting a sheet tobacco production line, and conveying the sheet tobacco production line to the loose moisture recovery production line after mixing the sheet tobacco with the conventional tobacco at a pre-calculated sheet tobacco flow; and dynamically adjusting the water addition amount of the loose moisture recovery machine according to the sheet tobacco incoming moisture value, the conventional tobacco incoming moisture value, and the material flow proportion of the sheet tobacco and the conventional tobacco. The application can effectively reduce the standard deviation of the loose moisture recovery outlet moisture, automatically match the sheet tobacco flow, calculate the water addition amount by using the proportion of the sheet tobacco and the conventional tobacco, reduce the inconsistency and fluctuation in the processing process, and ensure that each batch of tobacco meets the expected moisture requirement.

Description

Technical Field

[0001] This invention relates to the field of tobacco processing technology, and in particular to a method and system for reducing the influence of thin tobacco leaves on the moisture content deviation of loose, rehydrated export products. Background Technology

[0002] The tobacco processing industry has consistently strived to improve the quality and production efficiency of tobacco leaf products. Loosening and rehydration is a crucial step in tobacco leaf processing, its quality directly impacting the taste and appearance of the final tobacco product. However, understanding the impact of different tobacco leaf types, including sheet tobacco, on the standard deviation of moisture content at the outlet of loosening and rehydration remains a challenge.

[0003] In traditional tobacco processing systems, thin tobacco flakes are intermittently added to regular tobacco leaves. These flakes, formed from tobacco stems through special physical and chemical processing, have good water absorption. Currently, the impact of these flakes is often overlooked in water addition calculations. This leads to significant deviations in moisture content after the flakes enter or leave the rehumidifier. When the moisture meter detects the outlet moisture content and adjustments are made, large fluctuations occur.

[0004] In existing technologies, the moisture control of tobacco leaves in loosening and rehydration machines is based on multiplying the feed flow rate by a water addition coefficient to determine the water addition amount. However, there are differences in moisture content between each bale of thin tobacco leaves, and the characteristics of thin tobacco leaves also differ significantly from those of conventional tobacco leaves. Traditional water addition systems lack the ability to predict and actively adjust for the entry or exit of thin tobacco leaves, resulting in insufficient flexibility in responding to changes. Summary of the Invention

[0005] This invention provides a method and system for reducing the impact of thin tobacco leaves on the moisture content deviation of loose, rehydrated tobacco leaves at the outlet, in order to solve the technical problems in the prior art.

[0006] The technical solution adopted in this invention is as follows: Firstly, a method for reducing the impact of thin-leaf tobacco on the moisture content deviation of loose, rehydrated tobacco leaves at the export site is provided, comprising:

[0007] The conventional tobacco production line transports conventional tobacco leaves to the loose rehydration production line. After the moisture content of the conventional tobacco leaves at the outlet of the loose rehydration machine is stabilized within the set range, the sheet tobacco production line is started. The sheet tobacco production line mixes the conventional tobacco leaves from the conventional tobacco production line with the pre-calculated sheet tobacco flow rate and then transports them together to the loose rehydration production line.

[0008] The system acquires in real-time the moisture content of the incoming sheet tobacco, the material flow rate of the sheet tobacco, the moisture content of the incoming regular tobacco, and the material flow rates of the mixed regular and sheet tobacco. Based on the moisture content of the incoming sheet tobacco, the moisture content of the incoming regular tobacco, and the ratio of the material flow rates of the sheet tobacco to the regular tobacco, the system dynamically adjusts the amount of water added to the loosening and rehumidifying machine to adjust the moisture content of the mixed sheet tobacco and regular tobacco to the set value at the process outlet.

[0009] Furthermore, the method for calculating the pre-calculated flow rate of the thin-sheet tobacco leaves includes:

[0010] After the thin-sheet tobacco production line is started, the total time t for all thin-sheet tobacco leaves to be added is t = (P 常规总 *(1-b1)-P 电子秤 ) / Q 松散 Among them, P 常规总 P represents the total quantity of regular tobacco leaf batches that need to be processed. 电子秤 Q represents the cumulative amount of conventional tobacco processing in the initial stage. 松散 b1 is the set flow rate for the loose re-moistening production line, and b1 is the percentage of regular tobacco leaves passed through the tail stage alone.

[0011] Thin-leaf tobacco flow rate Q 薄片 =P 薄片总 / t; where P 薄片总 This refers to the total batch size of the thin tobacco leaves that need to be processed.

[0012] Furthermore, the calculation method for dynamically adjusting the water addition of the loosening and rehydration machine includes:

[0013] The following factors were added to the control model for water addition in the loosening and rehumidifying machine: the moisture content of the raw tobacco leaves, the ratio of the material flow rate of thin tobacco leaves to that of conventional tobacco leaves, and the special water absorption properties of thin tobacco leaves.

[0014] W 加水量 =Q 松散 *(M 设定 -M 混合 ) / (100%-M 设定 )*K;

[0015] Among them, W 加水量 M represents the amount of water added to the loosening and rehumidifying machine per unit time, K represents the standard water addition ratio, and M represents the amount of water added per unit time. 设定 M is the setpoint for the process outlet moisture content. 混合 This refers to the inlet moisture of the material after the mixture of sheet tobacco and conventional tobacco.

[0016] Furthermore, the method for calculating the special water absorption properties of the thin tobacco leaves includes:

[0017] Real-time acquisition of moisture content of incoming thin-flake tobacco leaves on the thin-flake tobacco leaf production line;

[0018] According to the formula △M 薄片 =M 薄片 *b2 determines whether the moisture content at the outlet of the loosening rehumidifier is stable, where b2 is the water absorption characteristic value of thin tobacco leaves, M 薄片 To obtain the moisture content of the incoming thin-leaf tobacco in real time, △M 薄片 To adjust the moisture content of the incoming thin-leaf tobacco leaves;

[0019] If the moisture content at the outlet of the loosening and rehydration machine is stable, a definite value for the weighting coefficient b2 is obtained; if the moisture content at the outlet of the loosening and rehydration machine is unstable, b2 is adjusted by increasing or decreasing the weighting coefficient b2 until the moisture content at the outlet of the loosening and rehydration machine is stable, and a definite value for b2 is obtained.

[0020] Furthermore, the moisture content M at the inlet of the material after the thin tobacco leaves and conventional tobacco leaves are mixed... 混合 The calculation methods include:

[0021] M 混合 =(Q 薄片 / Q 松散 )*△M 薄片 +(Q 松散 -Q 薄片 ) / Q 松散 *M 常规 , of which M 常规 For reality

[0022] The moisture content of conventional tobacco leaves measured at that time.

[0023] Secondly, a system is provided to reduce the impact of thin-leaf tobacco leaves on the moisture content deviation of loose, rehydrated export products, comprising:

[0024] A conventional tobacco production line is used to transport conventional tobacco leaves to a loose and rehydrated production line; the conventional tobacco production line is equipped with a conventional tobacco moisture meter for real-time measurement of the moisture content of incoming conventional tobacco leaves.

[0025] A flake tobacco production line is used to mix flake tobacco with conventional tobacco from a conventional tobacco production line at a pre-calculated flow rate. The flake tobacco production line is equipped with a flake tobacco electronic scale and a flake tobacco moisture meter. The flake tobacco electronic scale is used to measure the material flow rate of flake tobacco in real time, and the flake tobacco moisture meter is used to measure the moisture content of the incoming flake tobacco in real time.

[0026] The loose rehydration production line is used to transport the mixed sheet tobacco leaves and regular tobacco leaves to the loose rehydration machine for water addition; the loose rehydration production line is equipped with a loose rehydration electronic scale, which is used to measure the flow rate of the mixed sheet tobacco leaves and regular tobacco leaves in real time.

[0027] The moisture adjustment module is used to dynamically adjust the amount of water added to the loosening and rehumidifying machine based on the real-time obtained moisture values ​​of the incoming thin-leaf tobacco, the incoming moisture value of the conventional tobacco, and the material flow ratio of thin-leaf tobacco to conventional tobacco, so that the moisture content of the mixed thin-leaf tobacco and conventional tobacco is adjusted to the set value of the process outlet moisture content.

[0028] Furthermore, the conventional tobacco production line includes a slicer, a first conventional tobacco conveyor belt, a second conventional tobacco conveyor belt, and a mixed tobacco conveyor belt connected in sequence. A tobacco bale fork sorter is installed above the first conventional tobacco conveyor belt, and a conventional tobacco moisture meter is installed above the second conventional tobacco conveyor belt.

[0029] Furthermore, the thin-sheet tobacco production line includes a thin-sheet tobacco loosening device, a thin-sheet tobacco feeder, a thin-sheet tobacco electronic scale, and a thin-sheet tobacco conveyor belt connected in sequence. A thin-sheet tobacco moisture meter is installed above the thin-sheet tobacco electronic scale or the thin-sheet tobacco conveyor belt, and the thin-sheet tobacco conveyor belt transports the thin-sheet tobacco to the top of the mixed tobacco conveyor belt.

[0030] Furthermore, the loose rehydration production line includes a loose rehydration electronic scale, a vibrating conveyor, and a loose rehydration machine connected in sequence from end to end, and an outlet moisture meter is installed at the outlet of the loose rehydration machine.

[0031] Furthermore, the system adjusts the moisture content of the mixed sheet tobacco leaves and conventional tobacco leaves to the set moisture content at the process outlet using the method described in the first aspect.

[0032] The beneficial effects of this invention are as follows: This invention effectively reduces the standard deviation of moisture content at the outlet of loose, rehydrated tobacco leaves. By automatically matching the flow rate of sheet tobacco leaves and calculating the amount of water added using the ratio of sheet tobacco leaves to regular tobacco leaves, it reduces inconsistencies and fluctuations during processing and ensures that each batch of tobacco leaves meets the expected moisture requirements. This innovative method anticipates and proactively adjusts changes during tobacco leaf processing, thereby effectively reducing instability in the production process and significantly improving the CPK (process capability index) of the outlet moisture content. In summary, this invention not only improves the consistency and stability of tobacco leaf products but also brings higher production efficiency and quality control levels to the tobacco processing industry, possessing significant commercial value. Attached Figure Description

[0033] Figure 1 This is a schematic flowchart of the method for reducing the influence of thin tobacco leaves on the moisture content deviation of loose rehydrated tobacco leaves at the outlet, as disclosed in this invention.

[0034] Figure 2a This is a graph showing the change in moisture content at the tobacco leaf outlet over time after the thin tobacco leaves enter the loosening and rehumidifying machine in the existing technology.

[0035] Figure 2bThis is a graph showing the change in moisture content at the tobacco leaf outlet over time after the thin tobacco leaves enter the loosening and rehumidifying machine using the method of the present invention.

[0036] Figure 3 This is a structural block diagram of the system disclosed in this invention for reducing the influence of thin tobacco leaves on the moisture content deviation of loose, rehydrated tobacco leaves at the outlet.

[0037] Figure labels: 1-Slicer, 2-First conveyor belt for conventional tobacco leaves, 3-Second conveyor belt for conventional tobacco leaves, 4-Mixed tobacco leaf conveyor belt, 5-Electronic scale for loosening and rehydration, 6-Vibrating conveyor, 7-Loosening and rehydration machine, 8-Tobacco bale fork separator, 9-Moisture meter for conventional tobacco leaves, 10-Flake tobacco leaf loosening device, 11-Flake tobacco leaf feeder, 12-Electronic scale for flake tobacco leaves, 13-Flake tobacco leaf conveyor belt, 14-Moisture meter for flake tobacco leaves. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be described in further detail below with reference to the accompanying drawings, but the embodiments of this invention are not limited thereto. It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0039] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing the invention and its embodiments, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to be constructed and operated in a specific orientation.

[0040] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in certain situations to indicate a dependency or connection. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0041] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0042] Example 1:

[0043] See Figure 1 This embodiment discloses a method for reducing the impact of flake tobacco leaves on the moisture content deviation at the outlet of the loose re-humidification machine. Taking brand A tobacco as an example, the process parameters for the loose re-humidification process are: outlet material moisture content % (19.2±1.5), material flow rate kg / h (4000±80). The material flow rate of flake tobacco leaves is calculated, and the material flow rate may vary for each batch of flake tobacco leaves. Through systematic analysis of the influencing factors on the outlet moisture content fluctuation of flake tobacco leaves entering the loose re-humidification machine and conventional tobacco leaves entering the loose re-humidification machine, the key factors affecting the outlet moisture content deviation of flake tobacco leaves entering the loose re-humidification machine are identified, including the incoming moisture content of the flake tobacco leaves and the material flow rate.

[0044] The method includes:

[0045] S1: The conventional tobacco production line transports conventional tobacco leaves to the loose rehydration production line. After the moisture content of the conventional tobacco leaves at the outlet of the loose rehydration machine is stabilized within the set range, the sheet tobacco production line is started. The sheet tobacco production line mixes the conventional tobacco leaves from the conventional tobacco production line with the pre-calculated sheet tobacco flow rate and then transports them together to the loose rehydration production line.

[0046] Specifically, after the loosening and rehumidification process meets the production conditions, the loosening and rehumidification production line is started. Regular tobacco leaves enter the loosening and rehumidification machine for heating and humidification. After passing the initial feeding stage, the moisture content at the outlet of the loosening and rehumidification machine stabilizes within ±0.5% of the set center value of the process parameters for one minute. Then, the system automatically starts the sheet production line. The total batch size P of regular tobacco leaves to be processed is obtained through work order information and MES data. 常规总 The total batch size of thin tobacco leaves to be processed, P 薄片总 The cumulative amount P of conventional tobacco processing in the initial stage 电子秤 The set flow rate of the loose rehydration production line (i.e., the set flow rate of the loose rehydration scale, including the initial stage, the final stage, and the mixing stage) Q 松散 Set the percentage of regular tobacco leaves processed separately at the end of the feeding stage as b1. Establish the flow matching formula for the electronic scale for thin-leaf tobacco leaves: Total time t for all thin-leaf tobacco leaves to be added = (P 常规总 *(1-b1)-P 电子秤 ) / Q松散 ; Thin-leaf tobacco leaf flow rate Q 薄片 =P 薄片总 / t.

[0047] S2: Real-time acquisition of the moisture content of the incoming thin-leaf tobacco, the material flow rate of thin-leaf tobacco, the moisture content of the incoming conventional tobacco, and the material flow rates of the mixed conventional and thin-leaf tobacco. Based on the moisture content of the incoming thin-leaf tobacco, the moisture content of the incoming conventional tobacco, and the material flow ratio of thin-leaf tobacco to conventional tobacco, the amount of water added to the loosening and rehydration machine is dynamically adjusted to adjust the moisture content of the mixed thin-leaf tobacco and conventional tobacco to the set value of the process outlet moisture content.

[0048] Specifically, the calculation method for dynamically adjusting the water addition of the loosening and rehumidifying machine includes:

[0049] The following factors were added to the control model for water addition in the loosening and rehumidifying machine: the moisture content of the raw tobacco leaves, the ratio of the material flow rate of thin tobacco leaves to that of conventional tobacco leaves, and the special water absorption properties of thin tobacco leaves.

[0050] W 加水量 =Q 松散 *(M 设定 -M 混合 ) / (100%-M 设定 )*K; where W 加水量 M represents the amount of water added to the loosening and rehumidifying machine per unit time. K is the standard water addition ratio (K's normal value is 1; different types of smoke have different water absorption rates, so K is used for fine-tuning and is a constant). 设定 Set the process outlet moisture value (M in this embodiment) 设定 (19.2% ± 1.5%), M 混合 This refers to the inlet moisture of the material after the mixture of sheet tobacco and conventional tobacco.

[0051] (1) Determination of the moisture content of incoming sheet tobacco: A moisture meter is installed above the sheet tobacco production line to measure the moisture content of the incoming sheet tobacco in real time. According to the formula △M... 薄片 =M 薄片 *b2 determines whether the moisture content at the outlet of the loosening rehumidifier is stable, where b2 is the water absorption characteristic value of thin tobacco leaves, M 薄片 To obtain the moisture content of the incoming thin-leaf tobacco in real time, △M 薄片 To adjust the moisture content of the incoming thin-sheet tobacco leaves. If the outlet moisture content is stable, a definite value for the weighting coefficient b2 is obtained; if the outlet moisture content is unstable, b2 is adjusted by increasing or decreasing the weighting coefficient until the outlet moisture content stabilizes, yielding a definite value for b2. It should be noted that thin-sheet tobacco leaves are produced through controlled process conditions, the addition of special formulas, and the use of unique technologies, which improves the water absorption performance of the tobacco leaves. Therefore, the b2 value must be considered in the calculation of water addition for thin-sheet tobacco leaves.

[0052] (2) Determination of moisture content after mixing thin-leaf tobacco leaves and conventional tobacco leaves: Obtain the actual value M measured by a moisture meter for conventional tobacco leaves. 常规 M 混合 =(Q 薄片 / Q 松散 )*△M 薄片 +(Q 松散 -Q 薄片 ) / Q 松散 *M 常规 .

[0053] (3) Ensure data real-time performance. It takes 15 seconds for the thin tobacco leaves to go from the moisture meter to the regular tobacco leaf mixing point, and 23 seconds for the mixed tobacco leaves to go from the loose re-moistening inlet. To ensure the real-time performance of the moisture content of the thin tobacco leaves and the mixed tobacco leaves, a data stack is used to store the measured data in real time.

[0054] See Figure 2a (Horizontal axis represents time, vertical axis represents moisture content). In existing technology, after the thin-leaf tobacco leaves enter the loosening and rehumidifying machine, the moisture content at the tobacco leaf outlet decreases, and the water supply system lags behind in adjustment, causing fluctuations in outlet moisture content during the adjustment process. After the thin-leaf tobacco leaves are added, the water demand for regular tobacco leaves decreases, and the water supply system lags behind in adjustment, causing an increase in outlet moisture content. The moisture content fluctuates significantly throughout the entire adjustment process.

[0055] See Figure 2b (Horizontal axis represents time, vertical axis represents moisture content). Using the method of this invention, the flow rates of the sheet tobacco electronic scale and the loose rehydration electronic scale are matched, resulting in more uniform material distribution. Simultaneously, by incorporating the inherent characteristics of the sheet tobacco and the incoming material moisture content into the loose rehydration water addition algorithm, the influence of the sheet tobacco on the moisture content deviation at the loose rehydration outlet is reduced. The moisture value fluctuation throughout the entire adjustment process is minimal.

[0056] This invention automatically matches the flow rate of sheet tobacco based on its inherent characteristics, calculates the water addition amount using the ratio of sheet tobacco to regular tobacco, and incorporates the inlet moisture of the mixed tobacco leaves into a pre-defined water addition algorithm. This method reduces the impact of sheet tobacco on the stability of the outlet moisture content of the loose rehumidifier. By predicting and adjusting in advance, it increases the outlet moisture content CPK (process capability index), thereby improving product quality and stability. After using this method, the standard deviation of the outlet moisture content of the loose rehumidifier decreased from 0.49 to 0.33.

[0057] Example 2:

[0058] See Figure 3This embodiment discloses a system for reducing the impact of flake tobacco leaves on the moisture content deviation at the outlet of loose, rehydrated tobacco. The system includes: a conventional tobacco production line for conveying conventional tobacco leaves to the loose, rehydrated tobacco production line; a conventional tobacco moisture meter 9 installed on the conventional tobacco production line for real-time measurement of the incoming moisture content of the conventional tobacco leaves; and a flake tobacco production line for mixing the conventional tobacco leaves from the conventional tobacco production line with the flake tobacco leaves at a pre-calculated flow rate; the flake tobacco production line is equipped with a flake tobacco electronic scale 12 and a flake tobacco moisture meter 14, the flake tobacco electronic scale 12 being used to measure the material flow rate of the flake tobacco leaves in real-time. Moisture meter 14 is used to measure the moisture content of incoming sheet tobacco leaves in real time; the loosening and rehydration production line is used to transport the mixed sheet tobacco leaves and regular tobacco leaves to the loosening and rehydration machine 7 for water addition; the loosening and rehydration production line is equipped with a loosening and rehydration electronic scale 5, which is used to measure the flow rate of the mixed sheet tobacco leaves and regular tobacco leaves in real time; the moisture adjustment module is used to dynamically adjust the water addition of the loosening and rehydration machine 7 according to the real-time obtained moisture content of the incoming sheet tobacco leaves, the moisture content of the incoming regular tobacco leaves, and the material flow ratio of sheet tobacco leaves and regular tobacco leaves, so that the moisture content of the mixed sheet tobacco leaves and regular tobacco leaves is adjusted to the set moisture content at the process outlet.

[0059] Specifically, the conventional tobacco production line includes a slicer 1, a first conventional tobacco conveyor belt 2, a second conventional tobacco conveyor belt 3, and a mixed tobacco conveyor belt 4 connected in sequence. A tobacco bale fork sorter 8 is installed above the first conventional tobacco conveyor belt 2, and a conventional tobacco moisture meter 9 is installed above the second conventional tobacco conveyor belt 3.

[0060] Specifically, the thin-sheet tobacco production line includes a thin-sheet tobacco loosening device 10, a thin-sheet tobacco feeder 11, a thin-sheet tobacco electronic scale 12, and a thin-sheet tobacco conveyor belt 13 connected in sequence. A thin-sheet tobacco moisture meter 14 is installed above the thin-sheet tobacco electronic scale 12 or the thin-sheet tobacco conveyor belt 13. The thin-sheet tobacco conveyor belt 13 transports the thin-sheet tobacco to the mixed tobacco conveyor belt 4.

[0061] Specifically, the loose rehydration production line includes a loose rehydration electronic scale 5, a vibrating conveyor 6, and a loose rehydration machine 7 connected in sequence from end to end. An outlet moisture meter is installed at the outlet of the loose rehydration machine 7.

[0062] Specifically, the system adjusts the moisture content of the mixed sheet tobacco leaves and conventional tobacco leaves to the set moisture content at the process outlet using the method described in Example 1.

[0063] In this embodiment, both the thin tobacco leaf electronic scale 12 and the loose re-moistening electronic scale 5 are electronic belt scales.

[0064] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the 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.

Claims

1. A method for reducing the impact of thin-leaf tobacco leaves on the moisture content deviation of loose, rehydrated export products, characterized in that, include: The conventional tobacco production line transports conventional tobacco leaves to the loose rehydration production line. After the moisture content of the conventional tobacco leaves at the outlet of the loose rehydration machine is stabilized within the set range, the sheet tobacco production line is started. The sheet tobacco production line mixes the conventional tobacco leaves from the conventional tobacco production line with the pre-calculated sheet tobacco flow rate and then transports them together to the loose rehydration production line. The system acquires in real time the moisture content of the incoming sheet tobacco, the material flow rate of the sheet tobacco, the moisture content of the incoming regular tobacco, and the material flow rates of the mixed regular and sheet tobacco. Based on the moisture content of the incoming sheet tobacco, the moisture content of the incoming regular tobacco, and the material flow rate ratio of the sheet tobacco to the regular tobacco, the system dynamically adjusts the amount of water added to the loosening and rehumidifying machine to adjust the moisture content of the mixed sheet tobacco and regular tobacco to the set value of the process outlet moisture content. The method for calculating the pre-calculated flow rate of thin tobacco leaves includes: After the thin-sheet tobacco production line is started, the total time t for all thin-sheet tobacco leaves to be added is t = (P 常规总 *(1-b1)- P 电子秤 ) / Q 松散 Among them, P 常规总 P represents the total quantity of regular tobacco leaf batches that need to be processed. 电子秤 Q represents the cumulative amount of conventional tobacco processing in the initial stage. 松散 b1 is the set flow rate for the loose re-moistening production line, and b1 is the percentage of regular tobacco leaves passed through the tail stage alone. Thin-leaf tobacco flow rate Q 薄片 =P 薄片总 / t; where P 薄片总 This refers to the total batch size of the thin-leaf tobacco leaves that need to be processed. The calculation method for dynamically adjusting the water addition of the loosening and rehumidifying machine includes: The following factors were added to the control model for water addition in the loosening and rehumidifying machine: the moisture content of the raw tobacco leaves, the ratio of the material flow rate of thin tobacco leaves to that of conventional tobacco leaves, and the special water absorption properties of thin tobacco leaves. W 加水量 = Q 松散 *(M 设定 -M 混合 ) / (100%- M 设定 )* K; Among them, W 加水量 M represents the amount of water added to the loosening and rehumidifying machine per unit time, K represents the standard water addition ratio, and M represents the amount of water added per unit time. 设定 M is the setpoint for the process outlet moisture content. 混合 The inlet moisture content of the material after mixing sheet tobacco and conventional tobacco leaves; The calculation method for the special water absorption properties of the thin tobacco leaves includes: Real-time acquisition of moisture content of incoming thin-flake tobacco leaves on the thin-flake tobacco leaf production line; According to the formula △M 薄片 = M 薄片 *b2 determines whether the moisture content at the outlet of the loosening rehumidifier is stable, where b2 is the water absorption characteristic value of thin tobacco leaves, M 薄片 To obtain the moisture content of the incoming thin-leaf tobacco in real time, △M 薄片 To adjust the moisture content of the incoming thin-leaf tobacco leaves; If the moisture content at the outlet of the loosening rehumidifier is stable, a definite value for the weighting coefficient b2 is obtained; if the moisture content at the outlet of the loosening rehumidifier is unstable, b2 is adjusted by increasing or decreasing the weighting coefficient b2 until the moisture content at the outlet of the loosening rehumidifier is stable, and a definite value for b2 is obtained. The moisture content M at the material inlet after mixing the thin tobacco leaves and conventional tobacco leaves 混合 The calculation methods include: M 混合 = (Q) 薄片 / Q 松散 )* △M 薄片 + (Q) 松散 -Q 薄片 ) / Q 松散 * M 常规 , of which M 常规 This represents the real-time measured moisture content of conventional tobacco leaves.

2. A system for reducing the influence of flake tobacco leaves on the moisture content standard deviation at the outlet of loose, rehydrated tobacco, using the method for reducing the influence of flake tobacco leaves on the moisture content standard deviation at the outlet of loose, rehydrated tobacco as described in claim 1, characterized in that, include: A conventional tobacco production line is used to transport conventional tobacco leaves to a loose, rehydrated production line. The conventional tobacco production line is equipped with a conventional tobacco moisture meter for real-time measurement of the moisture content of incoming conventional tobacco leaves. A sheet tobacco production line is used to mix sheet tobacco with conventional tobacco from a conventional tobacco production line at a pre-calculated flow rate. The thin-sheet tobacco production line is equipped with a thin-sheet tobacco electronic scale and a thin-sheet tobacco moisture meter. The thin-sheet tobacco electronic scale is used to measure the material flow rate of thin-sheet tobacco in real time, and the thin-sheet tobacco moisture meter is used to measure the moisture content of the incoming thin-sheet tobacco in real time. The loose rehydration production line is used to transport the mixed sheet tobacco leaves and regular tobacco leaves to the loose rehydration machine for water addition; the loose rehydration production line is equipped with a loose rehydration electronic scale, which is used to measure the flow rate of the mixed sheet tobacco leaves and regular tobacco leaves in real time. The moisture adjustment module is used to dynamically adjust the amount of water added to the loosening and rehumidifying machine based on the real-time obtained moisture values ​​of the incoming thin-leaf tobacco, the incoming moisture value of the conventional tobacco, and the material flow ratio of thin-leaf tobacco to conventional tobacco, so that the moisture content of the mixed thin-leaf tobacco and conventional tobacco is adjusted to the set value of the process outlet moisture content.

3. The system for reducing the influence of thin-leaf tobacco leaves on the moisture content deviation of loose, rehydrated tobacco leaves at the outlet, as described in claim 2, is characterized in that... The conventional tobacco production line includes a slicer, a first conventional tobacco conveyor belt, a second conventional tobacco conveyor belt, and a mixed tobacco conveyor belt connected in sequence. A tobacco bale fork sorter is installed above the first conventional tobacco conveyor belt, and a conventional tobacco moisture meter is installed above the second conventional tobacco conveyor belt.

4. The system for reducing the influence of thin-leaf tobacco leaves on the moisture content deviation of loose, rehydrated tobacco leaves at the outlet, as described in claim 3, is characterized in that... The thin-sheet tobacco production line includes a thin-sheet tobacco loosening device, a thin-sheet tobacco feeder, a thin-sheet tobacco electronic scale, and a thin-sheet tobacco conveyor belt connected in sequence. A thin-sheet tobacco moisture meter is installed above the thin-sheet tobacco electronic scale or the thin-sheet tobacco conveyor belt. The thin-sheet tobacco conveyor belt transports the thin-sheet tobacco leaves to the top of the mixed tobacco conveyor belt.

5. The system for reducing the influence of thin-leaf tobacco leaves on the moisture content deviation of loose, rehydrated tobacco leaves at the outlet, as described in claim 4, is characterized in that... The loose rehydration production line includes a loose rehydration electronic scale, a vibrating conveyor, and a loose rehydration machine connected in sequence from end to end. An outlet moisture meter is installed at the outlet of the loose rehydration machine.

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