Water quantity superposition loosening and moisture regaining outlet moisture control method based on single water adding path

Abstract

The invention relates to the technical field of tobacco primary processing, and provides a water quantity superposition loose moisture regaining outlet moisture control method based on a single water adding path, which comprises the following steps: calculating a center water adding flow according to a difference value between a loose moisture regaining machine outlet material flow and a loose moisture regaining machine inlet belt weigher flow; according to the product of the supplemented moisture and the material flow at the inlet of the loose moisture regaining machine, the supplemented moisture adding flow is calculated; according to the product of the steam flow and the compensation coefficient, the steam moisture compensation water adding flow is calculated; the total water adding amount is obtained according to the sum of the center water adding flow, the water supplementing water adding flow and the steam water compensation water adding flow. The method solves the technical problems that the moisture control of the outlet of the loosening and dampening machine is lagged, the fluctuation is large, and the water adding compensation moisture absorption effect is poor after use, and stable control over the moisture of the loosening and dampening outlet is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of tobacco shreds, and in particular to a method for controlling moisture in a loose rehumidification outlet based on the amount of water added in a single water adding path. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] In the production process of cigarette products, the loosening and rehumidification process is one of the key processes. After the tobacco blanks are cut into pieces, they enter the loosening and rehumidification drum through electronic belt scales and other metering equipment. During the rotation of the drum, the rake nails in the drum, the guiding effect of the guide plate and the dual-medium nozzle are used to apply atomized water to complete the process tasks such as leaf loosening, heating and humidification, and removal of green impurities.

[0004] Due to the differences in the origin, grade, moisture content, etc. of the incoming materials (tobacco blanks), the control of the moisture content at the loose rehumidification outlet has always been a difficult problem in the industry. Currently, there are two main methods of controlling the amount of water added: one is the quantitative water addition method, which is greatly affected by the incoming materials and has large fluctuations in the moisture content at the outlet; the other is the feedback control method that calculates the amount of water added in real time. A dual-medium nozzle is often added at the tail of the drum for water addition compensation. The post-water addition method is not conducive to the tobacco leaves' full absorption of moisture. Summary of the invention

[0005] In order to solve the technical problems in the above-mentioned background technology such as delayed control of moisture content at the outlet of the loose rehumidification machine, large fluctuations, and poor effect of adding water after use to compensate for moisture absorption, the present invention provides a method for controlling moisture content at the loose rehumidification outlet based on a single water addition path and superimposed on the water volume.

[0006] In order to achieve the above object, the present invention adopts the following technical solution:

[0007] The first aspect of the present invention provides a method for controlling the water content of a single water adding path and superimposing the water content of a loose rehumidification outlet.

[0008] A method for controlling the water content of a single water adding path and superimposing the water content of a loose rewet outlet, comprising:

[0009] The central water addition flow is calculated based on the difference between the material flow at the outlet of the loose moisture-replenishing machine and the flow at the belt scale at the inlet of the loose moisture-replenishing machine;

[0010] The replenishment water flow rate is calculated based on the product of the replenishment water and the material flow rate at the inlet of the loose rehumidification machine;

[0011] Calculate the steam moisture compensation water flow rate based on the product of the steam flow rate and the compensation coefficient;

[0012] The total water addition amount is obtained based on the sum of the central water addition flow, the water addition flow for water replenishment and the water addition flow for steam moisture compensation.

[0013] Furthermore, the material flow rate at the outlet of the loose rehumidification machine is calculated using the following formula:

[0014] The material flow rate at the outlet of the loose rehumidification machine = the flow rate of the belt scale at the inlet of the loose rehumidification machine × ((1-moisture content of the inlet material) ÷ ​​(1-moisture content of the outlet material)).

[0015] Furthermore, the water replenishment is calculated using the following formula:

[0016] Replenish water = Δe × De

[0017] Wherein, De represents the slope coefficient, and Δe represents the difference between the moisture content of the outlet material in the previous collection cycle and the moisture content of the outlet material in the current collection cycle.

[0018] Further, when the supplemented moisture is ≥1% or ≤-1%, the supplemented moisture is taken as 1% or -1%.

[0019] A second aspect of the present invention provides a water volume superimposed loose moisture resurgence outlet moisture control system based on a single water addition path.

[0020] A water volume superposition loose moisture resurgence outlet moisture control system based on a single water addition path, comprising:

[0021] A central water addition flow calculation module is configured to: calculate the central water addition flow according to the difference between the material flow at the outlet of the loose rehumidification machine and the flow of the belt scale at the inlet of the loose rehumidification machine;

[0022] A water replenishment flow rate calculation module is configured to: calculate the water replenishment flow rate according to the product of the water replenishment and the material flow rate at the inlet of the loose rehumidification machine;

[0023] A steam moisture compensation water addition flow calculation module is configured to: calculate the steam moisture compensation water addition flow according to the product of the steam flow and the compensation coefficient;

[0024] The total water addition amount calculation module is configured to obtain the total water addition amount according to the sum of the central water addition flow, the water supplementation water addition flow and the steam moisture compensation water addition flow.

[0025] Furthermore, the central water flow calculation module is also configured as follows:

[0026] The material flow rate at the outlet of the loose rehumidification machine = the flow rate of the belt scale at the inlet of the loose rehumidification machine × ((1-moisture content of the inlet material) ÷ ​​(1-moisture content of the outlet material)).

[0027] Furthermore, the water replenishment flow calculation module is also configured as follows:

[0028] Replenish water = Δe × De

[0029] Wherein, De represents the slope coefficient, and Δe represents the difference between the moisture content of the outlet material in the previous collection cycle and the moisture content of the outlet material in the current collection cycle.

[0030] A third aspect of the present invention provides a computer-readable storage medium.

[0031] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps in the method for controlling the water volume and the loose rehumidification outlet water content based on a single water addition path as described in the first aspect above.

[0032] A fourth aspect of the present invention provides a computer device.

[0033] A computer device comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the steps in the method for controlling the water volume and the loose rehumidification outlet water content based on a single water addition path as described in the first aspect above are implemented.

[0034] A fifth aspect of the present invention provides a computer program product or a computer program.

[0035] The present invention provides a computer program product or a computer program, which includes computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes the steps in the water volume superposition loose rehumidification outlet moisture control method based on a single water addition path as described in the first aspect above.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] The present invention provides a method for controlling the water volume of a loose rehumidification outlet based on a single water adding path, including: calculating the central water adding flow rate according to the difference between the material flow rate at the loose rehumidification machine outlet and the belt scale flow rate at the loose rehumidification machine inlet; calculating the water adding flow rate of replenishing water according to the product of the replenishing water and the material flow rate at the loose rehumidification machine inlet; calculating the steam moisture compensation water adding flow rate according to the product of the steam flow and the compensation coefficient; and obtaining the total water adding amount according to the sum of the central water adding flow rate, the water adding flow rate of replenishing water and the steam moisture compensation water adding flow rate. The total water adding amount obtained by calculating the total water adding amount can realize the stable control of the water content at the loose rehumidification outlet, and the water content at the loose rehumidification outlet has a small fluctuation under the premise of ensuring that the water is fully absorbed, thereby improving the control accuracy of the water content at the loose rehumidification outlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0039] Figure 1 It is a flow chart of the method for controlling the water content of the water volume superimposed on the loose rehumidification outlet based on a single water adding path shown in the present invention;

[0040] Figure 2 It is a structural diagram of a water volume superimposed loose rehumidification outlet moisture control system based on a single water addition path shown in the present invention. DETAILED DESCRIPTION

[0041] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0042] It should be noted that the following detailed descriptions are all illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0043] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0044] It should be noted that the flowcharts and block diagrams in the accompanying drawings illustrate the possible implementation architecture, functions and operations of the methods and systems according to various embodiments of the present disclosure. It should be noted that each box in the flowchart or block diagram can represent a module, a program segment, or a part of a code, and the module, program segment, or a part of a code may include one or more executable instructions for implementing the logical functions specified in each embodiment. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in an order different from that marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, or they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the flowchart and / or block diagram, and the combination of boxes in the flowchart and / or block diagram can be implemented using a dedicated hardware-based system that performs a specified function or operation, or can be implemented using a combination of dedicated hardware and computer instructions.

[0045] Embodiment 1

[0046] like Figure 1 As shown, this embodiment provides a method for controlling the moisture content of the loose rehumidification outlet based on a single water addition path, and its basic control concept is that the moisture content of the incoming tobacco leaves has a basic range. The central value of the amount of water added is determined based on the central value of the basic range of the incoming tobacco leaves. The range of variation of the superimposed control water is also based on the range of variation of the moisture content of the incoming tobacco leaves to determine the control range of the superimposed water. Due to assembly line production, the moisture content of the tobacco leaves that are rehumidifying inside the drum is not the same package of tobacco leaves, and it is impossible to accurately apply moisture to a package of tobacco leaves. Therefore, a range is determined in the superimposed water control to prevent the tobacco leaves from having too much or too little moisture. In this embodiment, the method includes the following steps:

[0047] The central water addition flow is calculated based on the difference between the material flow at the outlet of the loose moisture-replenishing machine and the flow at the belt scale at the inlet of the loose moisture-replenishing machine;

[0048] The replenishment water flow rate is calculated based on the product of the replenishment water and the material flow rate at the inlet of the loose rehumidification machine;

[0049] Calculate the steam moisture compensation water flow rate based on the product of the steam flow rate and the compensation coefficient;

[0050] The total water addition amount is obtained based on the sum of the central water addition flow, the water addition flow for water replenishment and the water addition flow for steam moisture compensation.

[0051] The present invention realizes stable control of the moisture content at the loose moisture regeneration outlet by calculating the total amount of water added. Under the premise of ensuring sufficient moisture absorption, the moisture content at the loose moisture regeneration outlet fluctuates slightly, thereby improving the control accuracy of the moisture content at the loose moisture regeneration outlet.

[0052] The following is a detailed description of the water volume superimposed on the loose moisture resurgence outlet water control method of a single water adding path described in this embodiment, and the specific steps include:

[0053] Step 1: Use a single-path dual-media nozzle to apply atomized water. By simulating the working angle of the dual-media nozzle, the atomized water spraying section and the forward path of the tobacco leaves, after the tobacco leaves enter the atomization area of ​​the drum, the tobacco leaves are brought into the air by the rake and thrown down. As the tobacco leaves are in constant contact with the atomized water, the moisture content of the tobacco leaves continues to increase, and the atomized water is sprayed at one-third to one-half of the inside of the drum near the feeding end.

[0054] Step 2: Analyze the loose rehumidification process and find out the main factors that affect the stability of the loose rehumidification outlet moisture: tobacco raw materials, including the different hygroscopicity caused by the grade and origin of the raw materials, raw material moisture, etc.; the amount of water added, the amount of water added directly affects the export moisture control; steam quality and dosage, steam moisture content and dosage have a greater impact on the export moisture.

[0055] Step 3: Considering the above three main factors, the main idea of ​​controlling the stability of loose regain outlet moisture is as follows: the central water addition amount is determined by the raw material moisture; the supplementary moisture addition amount is determined by the real-time collected value and change trend of the outlet moisture; the steam moisture compensation water addition amount is determined by the steam flow rate; the total water addition amount is determined by the central water addition amount, the supplementary moisture addition amount and the steam moisture compensation water addition amount.

[0056] Step 4: Purpose and method of determining the amount of water added at the center. The purpose of determining the amount of water added at the center is to keep the moisture content at the loosening and rehumidification outlet within a reasonable fluctuation range to avoid the possibility of moisture out of control. The tobacco raw material is usually 200kg / box of cigarette packs, and the moisture content of the cigarette packs is basically between 9% and 11%, with a central value of 10%. The water addition flow rate can be calculated based on the moisture setting value at the loosening and rehumidification process outlet and the flow rate of the incoming material. The calculation formula is as follows:

[0057] The material flow rate at the outlet of the loose rehumidifier = the flow rate of the belt scale at the inlet of the loose rehumidifier × ((1-the moisture content of the inlet material) ÷ ​​(1-the moisture content of the outlet material)) (1)

[0058] Central water addition flow = loose rehumidification machine outlet material flow - loose rehumidification machine inlet belt scale flow (2)

[0059] Step 5: The amount of water added to replenish moisture is used to eliminate the moisture difference between the raw tobacco packages, so the amount of water added should not exceed the upper and lower limits of the raw material moisture fluctuation, that is, ±1%. Since the tobacco leaves inside the loose rehumidification drum may come from different tobacco leaves before and after, it is also used to prevent the tobacco leaves used for real-time moisture collection at the outlet from exceeding the upper and lower limits of the raw material moisture fluctuation. The tobacco leaves in the atomized water spraying area belong to different tobacco packages, which are over-adjusted to cause greater moisture fluctuations. That is, the effect of the amount of water added to compensate for the moisture at the outlet does not exceed the fluctuation range of the raw material moisture. The calculation method for the flow rate of water added is as follows:

[0060] Replenish water = Δe × De (3)

[0061] Where: De represents the slope coefficient, Δe represents the moisture content of the outlet material in the previous collection cycle - the moisture content of the outlet material in the current collection cycle.

[0062] According to the calculated replenishment water, calculate the replenishment water flow rate, the calculation formula is:

[0063] Water replenishment flow rate = water replenishment × loose rehumidification machine inlet material flow rate

[0064] Note: When the replenishment moisture is ≥1% or ≤-1%, the replenishment moisture is taken as 1% or -1%.

[0065] Step 6: Due to different hot air temperature settings, different incoming material temperatures, and the first batch of production, the amount of steam sprayed into the drum also changes, affecting the outlet moisture. In order to reduce the amount of steam sprayed into the drum, the steam moisture compensation is performed, and the calculation formula is as follows:

[0066] Steam moisture compensation water flow rate = steam flow rate × compensation coefficient (4)

[0067] When the center value is set reasonably, the fluctuation range of the moisture content at the loose rehumidification outlet in this control mode is reduced from ±2.0% in the constant water addition mode to ±0.9%.

[0068] Embodiment 2

[0069] like Figure 2 As shown, this embodiment provides a water volume superposition loose moisture return outlet moisture control system based on a single water addition path, including:

[0070] A central water addition flow calculation module is configured to: calculate the central water addition flow according to the difference between the material flow at the outlet of the loose rehumidification machine and the flow of the belt scale at the inlet of the loose rehumidification machine;

[0071] A water replenishment flow rate calculation module is configured to: calculate the water replenishment flow rate according to the product of the water replenishment and the material flow rate at the inlet of the loose rehumidification machine;

[0072] A steam moisture compensation water addition flow calculation module is configured to: calculate the steam moisture compensation water addition flow according to the product of the steam flow and the compensation coefficient;

[0073] The total water addition amount calculation module is configured to obtain the total water addition amount according to the sum of the central water addition flow, the water supplementation water addition flow and the steam moisture compensation water addition flow.

[0074] In some embodiments, the central water flow calculation module is further configured to:

[0075] The material flow rate at the outlet of the loose rehumidification machine = the flow rate of the belt scale at the inlet of the loose rehumidification machine × ((1-moisture content of the inlet material) ÷ ​​(1-moisture content of the outlet material)).

[0076] In some embodiments, the water replenishment flow rate calculation module is further configured to:

[0077] Replenish water = Δe × De

[0078] Wherein, De represents the slope coefficient, and Δe represents the difference between the moisture content of the outlet material in the previous collection cycle and the moisture content of the outlet material in the current collection cycle.

[0079] In some embodiments, when the supplemented moisture is ≥1% or ≤-1%, the supplemented moisture is taken as 1% or -1%.

[0080] Embodiment 3

[0081] This embodiment provides a computer-readable storage medium having a computer program stored thereon. When the program is executed by a processor, the steps in the method for controlling the water volume and the loose rehumidification outlet moisture content based on a single water addition path as described in the first embodiment above are implemented.

[0082] Embodiment 4

[0083] The present embodiment provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, the steps in the method for controlling the water volume and the loose rehumidification outlet moisture content based on a single water addition path as described in the first embodiment are implemented.

[0084] Embodiment 5

[0085] This embodiment provides a computer program product or a computer program, which includes computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes the steps of the water volume superimposed loose rehumidification outlet moisture control method based on a single water addition path as described in the first embodiment.

[0086] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of hardware embodiments, software embodiments, or embodiments combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) containing computer-usable program code.

[0087] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0088] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0089] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0090] A person skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program, and the program can be stored in a computer-readable storage medium, and when the program is executed, it can include the processes of the embodiments of the above-mentioned methods. The storage medium can be a disk, an optical disk, a read-only memory (ROM) or a random access memory (RAM), etc.

[0091] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for controlling the water content of a single water adding path and the water content of a loose rehumidification outlet, characterized in that: include: The central water addition flow is calculated based on the difference between the material flow at the outlet of the loose moisture-replenishing machine and the flow at the belt scale at the inlet of the loose moisture-replenishing machine; The replenishment water flow rate is calculated based on the product of the replenishment water and the material flow rate at the inlet of the loose rehumidification machine; Calculate the steam moisture compensation water flow rate based on the product of the steam flow rate and the compensation coefficient; The total water addition amount is obtained based on the sum of the central water addition flow, the water addition flow for water replenishment and the water addition flow for steam moisture compensation.

2. The method for controlling the water content of a single water adding path and the water content of a loose rehumidification outlet according to claim 1 is characterized in that: The material flow rate at the outlet of the loose rehumidification machine is calculated using the following formula: The material flow rate at the outlet of the loose rehumidification machine = the flow rate of the belt scale at the inlet of the loose rehumidification machine × ((1-moisture content of the inlet material) ÷ ​​(1-moisture content of the outlet material)).

3. The method for controlling water content at the outlet of the water volume superimposed on the loose moisture resurgence based on a single water adding path according to claim 1, characterized in that: The water replenishment is calculated using the following formula: Replenish water = Δe × De Wherein, De represents the slope coefficient, and Δe represents the difference between the moisture content of the outlet material in the previous collection cycle and the moisture content of the outlet material in the current collection cycle.

4. The method for controlling water content at the outlet of the water volume superimposed on the loose rehumidification outlet based on a single water adding path according to claim 3 is characterized in that: When the supplementary moisture is ≥1% or ≤-1%, the supplementary moisture is taken as 1% or -1%.

5. Based on the water volume superposition of a single water adding path, the loose rehumidification outlet moisture control system is characterized in that: include: A central water addition flow calculation module is configured to: calculate the central water addition flow according to the difference between the material flow at the outlet of the loose rehumidification machine and the flow of the belt scale at the inlet of the loose rehumidification machine; A water replenishment flow rate calculation module is configured to: calculate the water replenishment flow rate according to the product of the water replenishment and the material flow rate at the inlet of the loose rehumidification machine; A steam moisture compensation water addition flow calculation module is configured to: calculate the steam moisture compensation water addition flow according to the product of the steam flow and the compensation coefficient; The total water addition amount calculation module is configured to obtain the total water addition amount according to the sum of the central water addition flow, the water supplementation water addition flow and the steam moisture compensation water addition flow.

6. The water volume superimposed loose moisture resurgence outlet moisture control system based on a single water addition path according to claim 5 is characterized in that: The central water addition flow calculation module is also configured as follows: The material flow rate at the outlet of the loose rehumidification machine = the flow rate of the belt scale at the inlet of the loose rehumidification machine × ((1-moisture content of the inlet material) ÷ ​​(1-moisture content of the outlet material)).

7. The water volume superimposed loose moisture resurgence outlet moisture control system based on a single water addition path according to claim 5, characterized in that: The water replenishment flow rate calculation module is also configured as follows: Replenish water = Δe × De Wherein, De represents the slope coefficient, and Δe represents the difference between the moisture content of the outlet material in the previous collection cycle and the moisture content of the outlet material in the current collection cycle.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps in the method for controlling the water volume and the loose rehumidification outlet water content based on a single water addition path as described in any one of claims 1 to 4 are implemented.

9. A computer device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, the steps in the method for controlling the water volume and loose rehumidification outlet moisture based on a single water addition path as described in any one of claims 1 to 4 are implemented.

10. A computer program product, characterized in that The computer program product includes a computer program, and when the computer program is executed by a processor, the steps in the water volume superimposed loose rehumidification outlet moisture control method based on a single water addition path as described in any one of claims 1 to 4 are implemented.

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