A method, medium and apparatus for heating a cigarette production line

Abstract

The present application belongs to the technical field of heating cigarette production control, and particularly relates to a heating cigarette production line feeding method, medium and equipment. The feeding method comprises: taking the liquid temperature as the dependent variable, and the viscosity and the glycerol mass percentage fraction as the independent variables, establishing a binary nonlinear prediction equation of the glycerol liquid temperature; establishing a feeding working parameter table of the glycerol liquid; determining the target temperature value of the temperature control of the glycerol liquid, obtaining the actual temperature value at the nozzle of the glycerol liquid, and calculating the error between the actual temperature value and the target temperature value; establishing a transfer function of the temperature error and the actual temperature at the nozzle, and constructing an online temperature control system of the glycerol liquid, so as to be applied to the feeding process of the heating cigarette production line. The present application can adjust the actual value at the feeding nozzle in real time according to the design value of the glycerol liquid temperature, improve the online application stability and accuracy of the glycerol, and thus support the production quality control of the heating cigarette products.

Description

Technical Field

[0001] This invention belongs to the field of heated cigarette production control technology, specifically relating to a feeding method, medium, and equipment for a heated cigarette production line. Background Technology

[0002] With the rapid development of new tobacco products, heated cigarettes have gradually become a hot topic in product research and development. Heated cigarettes use a special heat source to heat the tobacco core material, producing smoke for consumers to inhale in a non-combustible state. The characteristics of the released smoke determine the sensory quality of the product. Currently, the tobacco core materials used to produce smoke are mostly of two types: ordered-filled slurry-processed reconstituted tobacco and disordered-filled paper-processed reconstituted tobacco. In recent years, to enrich the natural tobacco aroma characteristics of heated cigarette products, cigarette manufacturers have begun to use natural tobacco leaves as the core material.

[0003] In heated cigarettes, glycerol is the primary smoke-generating agent, possessing various properties such as moisturizing, high activity, antioxidant properties, and low-temperature smoking. Glycerol can carry tobacco aroma components at relatively low temperatures (below 300°C), which is crucial for the quality of heated cigarettes. However, due to its extremely high viscosity, applying glycerol to natural tobacco leaves is very difficult. Currently, the method of applying glycerol in the feeding process of heated cigarette production lines mainly relies on experience, reducing its viscosity by increasing the temperature (above 30°C) and then applying the glycerol solution to the tobacco in a certain proportion. However, this process lacks stable temperature control of the glycerol solution, easily leading to problems such as overheating or excessively high viscosity, resulting in large fluctuations in glycerol droplet size, affecting the accuracy of application, and failing to meet the quality control requirements of heated cigarette production.

[0004] Therefore, it is necessary to establish a feeding method for heated cigarette production lines that can adjust the actual value in real time according to the design value of the glycerol liquid temperature, thereby improving the stability of online application of glycerol and supporting the production quality control of heated cigarette products. Summary of the Invention

[0005] The purpose of this invention is to provide a feeding method, medium, and equipment for a heated cigarette production line, which can adjust the actual value in real time according to the design value of the viscosity of the glycerol liquid, so as to solve the problems existing in the background art.

[0006] To achieve the above objectives, this application employs the following technical solution:

[0007] A method for feeding materials into a heated cigarette production line includes the following steps:

[0008] S1. Using the temperature of the feed liquid as the dependent variable and the viscosity and mass percentage of glycerol as independent variables, a binary nonlinear prediction equation for the temperature of the glycerol feed liquid is established.

[0009] S2. Based on the binary nonlinear prediction equation in step S1, establish a table of feeding parameters for glycerol solution.

[0010] S3. According to the feeding working parameter table in step S2, select the glycerol mass percentage fraction and viscosity working point of the glycerol liquid, determine the target temperature value for temperature control of the glycerol liquid, obtain the actual temperature value at the glycerol liquid application nozzle, calculate the error between the actual temperature value and the target temperature value, and determine the interference temperature value of the feeding system.

[0011] S4. Establish a transfer function between temperature error and actual temperature at the nozzle, and construct an online control system for glycerol feed temperature to be applied to the feeding process of heated cigarette production lines.

[0012] Furthermore, in step S1, the bivariate nonlinear prediction equation for the glycerol feed solution is a bivariate differential equation relating temperature to viscosity and the mass percentage fraction of glycerol:

[0013] ,

[0014] Where z is the predicted temperature of the glycerol feed solution; k1-k 15 y represents the fitting parameters for the nonlinear prediction equation; x represents the viscosity of the glycerol solution; y represents the glycerol mass percentage of the solution; m is 0 or 4, and n is 0 or 3.

[0015] Furthermore, in step S2, the feeding parameters for the glycerol solution include the viscosity of the glycerol solution, the glycerol mass percentage, and the temperature.

[0016] Furthermore, the viscosity of the glycerol solution operates within a range of 0.3 cP to 624 cP, the glycerol mass percentage operates within a range of 0% to 100%, and the solution temperature is controlled within a range of 30°C to 100°C.

[0017] Furthermore, in step S3, the interference temperature of the feeding system is calculated based on the temperature difference between the glycerol feed liquid at the feed liquid temperature controller and the feed nozzle: e = z1 - z0, where e is the interference temperature of the feeding system; z1 is the feed liquid temperature at the temperature controller; and z0 is the feed liquid temperature at the nozzle.

[0018] Furthermore, in step S4, the input to the online control system is the error E between the target temperature value and the actual temperature value of the glycerol feed solution. z(S) The system output is the actual temperature value Z of the glycerol feed solution. (S) The transfer function G between the temperature error of the glycerol feed solution and the actual value was obtained. (S) : , where S is the complex frequency of the transfer function.

[0019] Furthermore, in step S4, the online control system includes a PID controller. An online control system for the temperature of the glycerol feed solution is established using the transfer function G(S). Preferably, a PID controller is introduced into the system, and appropriate proportional and integral gains are selected to further improve the system's control performance.

[0020] Where Z0(S) is the target value for glycerol liquid temperature control; Ez(S) is the error between the target value and the actual value of glycerol liquid temperature control; G(S) is the transfer function between the error and the actual value of glycerol liquid temperature; and Z(S) is the actual value of glycerol liquid temperature.

[0021] A medium having a program stored thereon, the program executing on a processor any of the above-described methods for feeding materials in a heated cigarette production line.

[0022] An apparatus includes a processor and a memory, the memory being used to store a program, the processor executing the program stored in the memory, causing the apparatus to perform any of the above-described methods for feeding materials in a heated cigarette production line.

[0023] The beneficial effects of this invention are:

[0024] 1) Compared with the current feeding method of heated cigarette production line, the present invention can adjust the actual value at the feeding nozzle in real time according to the design value of glycerol liquid temperature, improve the stability of online application of glycerol, and thus support the production quality control of heated cigarette products.

[0025] 2) Traditional methods for applying glycerol solution rely on experience, while this invention provides a precise feeding method based on a nonlinear temperature prediction equation and parameter table, which improves the accuracy and stability of the application.

[0026] 3) This invention is equipped with a medium storing a specific computer program that can execute a new feeding method for heated cigarette production lines on a processor, enabling the production equipment to control the temperature of the glycerol solution more efficiently, thereby improving product quality and meeting production requirements. Attached Figure Description

[0027] Figure 1 This is a flowchart of the method of the present invention.

[0028] Figure 2 This is a surface plot showing the viscosity of the feed solution between 0.3 cP and 34.9 cP, the glycerol mass percentage between 0% and 80%, and the corresponding temperature of the glycerol feed solution. Note: Blue dots represent predicted temperatures of the glycerol feed solution.

[0029] Figure 3The actual value control curve of the online feeding control system when the viscosity of the feed liquid is 9.4 cP, the mass percentage of glycerol is 70%, and the system interference temperature is 0.6℃ is the actual value control curve when the target temperature is 40℃.

[0030] Figure 4 This is a surface graph showing the viscosity of the glycerol solution between 3.2 cP and 624 cP, the glycerol mass percentage between 80% and 100%, and the corresponding glycerol solution temperature. Note: Blue dots represent predicted glycerol solution temperatures.

[0031] Figure 5 The actual value control curve of the online feeding control system when the viscosity of the feed liquid is 14.2 cP, the mass percentage of glycerol is 85%, and the system interference temperature is 1.1℃ is the actual value control curve when the target temperature is 60℃. Detailed Implementation

[0032] The technical solutions of the present invention will be described in detail below with reference to the embodiments. The following embodiments are merely exemplary and can only be used to explain and illustrate the technical solutions of the present invention, and should not be construed as limiting the technical solutions of the present invention.

[0033] Example 1

[0034] A feeding method, medium, and equipment for a heated cigarette production line, such as Figure 1 As shown, the method includes the following steps:

[0035] Step 1) Establish a bivariate nonlinear prediction equation for the temperature of the glycerol solution, with the temperature of the solution as the dependent variable and the viscosity and glycerol mass percentage as independent variables, as follows: Figure 2 As shown. When the viscosity of the feed solution is in the range of 0.3 cP to 34.9 cP and the mass percentage fraction (y) of glycerol is in the range of 0% to 80%, the temperature of the glycerol feed solution conforms to the following equation: ,

[0036] Where x is the viscosity of the glycerol solution; y is the mass percentage of glycerol in the solution; and z is the predicted temperature of the glycerol solution.

[0037] Step 2) Based on the nonlinear prediction equation for the temperature of the glycerol feed solution, a table of operating parameters for the glycerol feed solution is established, as shown in Table 1. From Table 1, the correlation coefficient between the predicted and actual results is calculated to be 0.999304.

[0038] Table 1 shows the measured and predicted temperatures of the feed solution with a viscosity between 0.3 cP and 34.9 cP and a glycerol mass percentage between 0 and 80%.

[0039] Table 1

[0040]

[0041] Continued from Table 1

[0042]

[0043] Continued from Table 1

[0044]

[0045] Continued from Table 1

[0046]

[0047] Step 3) Select the working point of the glycerol feed solution during the heating and feeding of cigarettes: viscosity of 9.4 cP, glycerol mass percentage of 70%, and temperature of 40℃.

[0048] Step 4) Use the transfer function G (S) An online control system for the temperature of glycerol feed solution was established, with a system disturbance temperature of -0.6℃, and PID control coefficients of 9, 0, and 0 were selected.

[0049]

[0050] When the viscosity of the feed liquid is 9.4 cP, the glycerol mass percentage is 70%, and the target temperature is 40℃, the actual temperature control curve of the online feeding control system is as follows: Figure 3 When applied to the heated cigarette production process, this online temperature control system allows the actual temperature of the glycerol solution at the nozzle to reach the target value within 5 seconds, achieving continuous temperature control. The system has no overshoot, solving the problem of slow cooling of the glycerol solution in the on-site insulation tank.

[0051] Example 2

[0052] A feeding method, medium, and equipment for a heated cigarette production line, such as Figure 1 As shown, the method includes the following steps:

[0053] Step 1) Establish a bivariate nonlinear prediction equation for the glycerol solution, with temperature as the dependent variable and viscosity and mass percentage as independent variables, as follows: Figure 4 As shown. When the viscosity of the glycerol solution is in the range of 3.2 cP to 624 cP, and the mass percentage fraction (y) of glycerol is in the range of 80% to 100%, the temperature of the glycerol solution conforms to the following equation:

[0054] ,

[0055] Where x is the viscosity of the glycerol solution; y is the mass percentage of glycerol in the solution; and z is the predicted temperature of the glycerol solution.

[0056] Step 2) Based on the nonlinear prediction equation for the temperature of the glycerol feed solution, a table of working parameters for the glycerol feed solution is established, as shown in Table 2. The correlation coefficient between the predicted and actual results, calculated from Table 2, is 0.999875.

[0057] Table 2 shows the measured and predicted temperatures of glycerol feed solutions with viscosities between 3.2 cP and 624 cP and glycerol mass percentages between 80% and 100%.

[0058] Table 2

[0059]

[0060] Step 3) Select the working point of the glycerol solution during heated cigarette production: viscosity of 14.2 cP, glycerol mass percentage of 85%, and temperature of 60℃.

[0061] Step 4) Use the transfer function G (S) An online control system for the temperature of glycerol feed solution was established, with a system interference temperature of -1.1℃. The PID control coefficients were selected as 15, 0.3, and 0.

[0062]

[0063] When the viscosity of the feed liquid is 14.2 cP, the glycerol mass percentage is 85%, and the target temperature is 60℃, the actual temperature curve of the online feeding control system is as follows: Figure 5 When applied to the heated cigarette production process, this online temperature control system allows the actual temperature of the glycerol solution at the nozzle to reach the target value within 5 seconds, achieving continuous temperature control. The system has no overshoot, solving the problem of slow cooling of the glycerol solution in the on-site insulation tank.

[0064] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A feeding method for a heated cigarette production line, characterized in that, Includes the following steps: S1. Using the predicted temperature of the glycerol solution as the dependent variable and the viscosity of the glycerol solution and the mass percentage of glycerol in the solution as independent variables, a binary nonlinear prediction equation for the temperature of the glycerol solution is established. S2. Based on the binary nonlinear prediction equation in step S1, establish a table of feeding parameters for glycerol solution. S3. According to the feeding working parameter table in step S2, select the glycerol mass percentage fraction and viscosity working point of the glycerol liquid, determine the target temperature value for temperature control of the glycerol liquid, obtain the actual temperature value at the glycerol liquid application nozzle, calculate the error between the actual temperature value and the target temperature value, and determine the interference temperature value of the feeding system. S4. Establish the transfer function between temperature error and actual temperature at the nozzle, and construct an online control system for glycerol liquid temperature to be applied to the feeding process of heated cigarette production line; In step S1, the bivariate nonlinear prediction equation for the glycerol feed solution is a bivariate differential equation relating its temperature prediction value to viscosity and the mass percentage fraction of glycerol: , Where z is the predicted temperature of the glycerol solution; k1-k 15 y represents the fitting parameters for the nonlinear prediction equation; x represents the viscosity of the glycerol solution; y represents the mass percentage of glycerol in the solution; m is 0 or 4, and n is 0 or 3. In step S2, the feeding parameters table for glycerol solution includes the viscosity of the glycerol solution, the mass percentage of glycerol, and the predicted temperature of the solution. In step S3, the interference temperature of the feeding system is calculated based on the temperature difference between the glycerol feed liquid at the feed liquid temperature controller and the feed nozzle: e = z1 - z0, where e is the interference temperature of the feeding system; z1 is the feed liquid temperature at the temperature controller; and z0 is the feed liquid temperature at the nozzle. In step S4, the input to the online control system is the error E between the target temperature value and the actual temperature value of the glycerol feed solution. z(S) The system output is the actual temperature value Z of the glycerol feed solution. (S) The transfer function G between the temperature error of the glycerol feed solution and the actual value was obtained. (S) : , where S is the complex frequency of the transfer function.

2. The feeding method for a heated cigarette production line according to claim 1, characterized in that, The viscosity of the glycerol solution is within the working range of 0.3 cP to 624 cP, the glycerol mass percentage is within the working range of 0% to 100%, and the predicted temperature of the solution is within the control range of 30℃ to 100℃.

3. The feeding method for a heated cigarette production line according to claim 1, characterized in that, In step S4, the online control system includes a PID controller.

4. A storage medium having a program stored thereon, characterized in that, The program executes the feeding method for a heated cigarette production line according to any one of claims 1 to 3 on a processor.

5. An electronic device comprising a processor and a memory, the memory for storing a program, the processor executing the program stored in the memory, characterized in that, The equipment is made to perform the feeding method of the heated cigarette production line according to any one of claims 1 to 3.

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