Water adding flow calculation method for a conditioning machine and storage medium

Abstract

The application discloses a water adding flow calculation method for a moisture regaining machine. The moisture regaining machine is provided with a motor, a rotating shaft and helical blades. The motor is used to drive the rotating shaft and the helical blades to rotate in the moisture regaining machine, so as to transport materials from the inlet of the moisture regaining machine to the outlet of the moisture regaining machine. The calculation method comprises the following steps: obtaining an outlet moisture content target value, an inlet moisture content measured value and an inlet flow measured value of the materials; calculating a water adding flow basic value according to the outlet moisture content target value, the inlet moisture content measured value, the inlet flow measured value and a first functional expression; obtaining a frequency of the motor and a steam pressure value in the moisture regaining machine; calculating a water adding flow adjustment value according to the frequency of the motor, the steam pressure value and a second functional expression; and calculating a total water adding flow according to the water adding flow basic value, the water adding flow adjustment value and a third functional expression. The water adding flow of the moisture regaining machine can be calculated according to the relevant parameters of the materials at the inlet of the moisture regaining machine. The application further discloses a computer readable storage medium.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of moisture regaining processing, in particular to a water adding flow calculation method for a moisture regainer and a storage medium. BACKGROUND

[0002] In the processing of tobacco stem, steam and water are needed to increase the temperature and humidity of tobacco stems, and moisture regaining treatment can effectively increase the moisture content and temperature of tobacco stems, enhance their flexibility and processing resistance, and facilitate subsequent processing. According to the “Cigarette Processing Specification”, dry tobacco stems should be processed to have a moisture content of 28.0-38.0% and a temperature of 40-60°C.

[0003] In the prior art, in order to control the moisture of tobacco stems, a PID control system is usually used for automatic control,

[0004] The moisture of the material at the outlet is continuously fed back to the adjusting device at the inlet of the moisture regainer, and the adjusting device adjusts the water flow according to the feedback result to achieve the purpose of adjusting the moisture of the material at the outlet. However, when this control method is applied to a drum or tunnel type moisture regainer, the moisture content of the tobacco stems produced in a certain period of time after the start of the equipment cannot be effectively adjusted. This is because the adjusting position is usually installed at the inlet end of the moisture regainer, and the feedback point is usually at the outlet end of the moisture regainer. It takes a certain time for the material to run from the inlet end to the outlet end of the moisture regainer. Since the inlet and outlet of the drum or tunnel type moisture regainer are far apart, when the moisture of the tobacco stems at the outlet is fed back to the adjusting device at the inlet, a large amount of material has already run to the downstream area of the adjusting device. At this time, the adjusting device at the inlet starts to adjust, which causes the moisture content of the material in the downstream area of the adjusting device to be unable to be fully adjusted. Therefore, using the traditional PID control system to adjust the water flow will cause serious hysteresis, resulting in the moisture content of the tobacco stems produced in a certain period of time after the start of the equipment being unable to be effectively adjusted. SUMMARY

[0005] The present application aims to solve the technical problem that using only a PID control system to adjust the water flow of a drum or tunnel type moisture regainer has great hysteresis, resulting in the moisture content of the tobacco stems produced in a certain period of time after the start of the equipment being unable to be effectively adjusted. The present application provides a water adding flow calculation method for a moisture regainer and a storage medium, which can calculate the water adding flow of the moisture regainer by detecting the relevant parameters of the material at the inlet of the moisture regainer, thereby eliminating the hysteresis of moisture content adjustment and enabling the moisture content of all the materials entering the moisture regainer to be effectively adjusted.

[0006] ​To solve the above technical problems, the embodiment of the present application discloses a water adding flow calculation method for a moisture regaining machine, the moisture regaining machine is provided with a motor, a rotating shaft and a spiral blade, the motor is used to drive the rotating shaft and the spiral blade to rotate in the moisture regaining machine, so as to transport the material from the inlet of the moisture regaining machine to the outlet of the moisture regaining machine, wherein the calculation method comprises:

[0007] Obtaining an outlet moisture content target value, an inlet moisture content measured value and an inlet flow measured value of the material;

[0008] Calculating a water adding flow basic value according to the outlet moisture content target value, the inlet moisture content measured value, the inlet flow measured value and a first functional expression;

[0009] Obtaining a frequency of the motor and a steam pressure value in the moisture regaining machine;

[0010] Calculating a water adding flow adjustment value according to the frequency of the motor, the steam pressure value and a second functional expression;

[0011] Calculating a total water adding flow according to the water adding flow basic value, the water adding flow adjustment value and a third functional expression.

[0012] Optionally, the first functional expression is:

[0013]

[0014] Wherein, W1 is the water adding flow basic value, the unit is kg / h, λ 出 is the outlet moisture content target value, λ 入 is the inlet moisture content measured value, H is the inlet flow measured value, the unit is kg / h, and α is a moisture correction factor.

[0015] Optionally, the second functional expression is:

[0016]

[0017] Wherein, W2 is the water adding flow adjustment value, the unit is kg / h, f is the frequency of the motor, the unit is Hz, α1 is a frequency conversion coefficient, the unit is , VP is the steam pressure value, the unit is bar, α2 is a steam conversion coefficient, the unit is .

[0018] Optionally, the third functional expression is:

[0019]

[0020] Wherein, W is the total water adding flow, the unit is kg / h, W1 is the water adding flow basic value, the unit is kg / h, W2 is the water adding flow adjustment value, the unit is kg / h, and β is a water adding flow correction value, the unit is kg / h.

[0021] Optionally, a moisture meter and an electronic belt scale are arranged at the inlet of the conditioner, the moisture meter is used to detect the inlet moisture content measurement value, the electronic belt scale is used to detect the inlet flow measurement value, and a pressure gauge is arranged in the conditioner and used to detect the steam pressure value.

[0022] Optionally, a frequency converter is arranged on the motor, the frequency converter is used to control the rotating speed of the rotating shaft, and the frequency set by the frequency converter is the frequency of the motor.

[0023] Optionally, the moisture correction factor is 0.37.

[0024] Optionally, the frequency conversion coefficient is .

[0025] Optionally, the steam conversion coefficient is .

[0026] Optionally, the water addition flow correction value is -20-20 kg / h.

[0027] The embodiment of the present application also discloses a computer readable storage medium, and the computer readable storage medium stores instructions, and the instructions are used to make the computer execute the water addition flow calculation method when the instructions are executed on the computer.

[0028] Compared with the prior art, the present application has the following beneficial effects:

[0029] The water addition flow value is calculated by detecting the relevant parameters of the material at the inlet of the conditioner, so that the moisture content of the material entering the conditioner can be adjusted in time, and compared with the prior art in which the water addition flow value is determined by detecting the relevant parameters of the material at the outlet of the conditioner, the embodiment can eliminate the hysteresis of the moisture content adjustment of the material in the prior art, so that the moisture content of all the materials entering the conditioner can be adjusted in time and effectively. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 A flow chart of the water addition flow calculation method provided by the embodiment of the present application is shown. DETAILED DESCRIPTION

[0031] The advantages and effects of the present application can be easily understood by those skilled in the art from the content disclosed in the specification. Although the description of the present application will be introduced in combination with the preferred embodiments, it does not mean that the features of the present application are limited to the embodiments. On the contrary, the purpose of introducing the present application in combination with the embodiments is to cover other options or modifications which can be extended based on the claims of the present application. In order to provide a deep understanding of the present application, many specific details will be included in the following description. The present application can also be implemented without using these details. In addition, in order to avoid confusion or obscure the focus of the present application, some specific details will be omitted in the description. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0032] It should be noted that in the specification, similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0033] The terms "first", "second", "third" and the like are only used for differentiation and cannot be understood as indicating or implying relative importance.

[0034] In order to make the purpose, technical solutions and advantages of the present application more clear, the embodiments of the present application will be further described in detail below in combination with the drawings.

[0035] The present application provides a water adding flow calculation method for a moisture regaining machine, the moisture regaining machine is provided with a motor, a rotating shaft and a spiral blade, the spiral blade is arranged on the circumferential surface of the rotating shaft, the motor is connected with the rotating shaft, and the motor is used to drive the rotating shaft and the spiral blade to rotate in the moisture regaining machine, so as to transport the material from the inlet of the moisture regaining machine to the outlet of the moisture regaining machine, wherein, as shown in the figure, the calculation method comprises: Figure 1

[0036] Step S1: obtaining an outlet moisture content target value, an inlet moisture content measured value and an inlet flow measured value of the material; wherein the outlet moisture content target value is a moisture content value that the tobacco stem should reach after being processed by the moisture regaining machine in the moisture regaining process, which is a standard value; the inlet moisture content measured value is the actual moisture content value of the tobacco stem entering the inlet of the moisture regaining machine; and the inlet flow measured value is the actual flow value of the tobacco stem entering the inlet of the moisture regaining machine;

[0037] Step S2: calculating a water adding flow basic value according to the outlet moisture content target value, the inlet moisture content measured value, the inlet flow measured value and a first functional expression;

[0038] Step S3: obtaining the frequency of the motor and the steam pressure value in the moisture regaining machine;

[0039] ​Step S4: calculating the water adding flow adjustment value according to the frequency of the motor, the steam pressure value and the second function formula;

[0040] Step S5: calculating the total water adding flow according to the water adding flow basic value, the water adding flow adjustment value and the third function formula.

[0041] Specifically, the water adding flow basic value is a water adding flow value calculated according to the outlet moisture content target value, the inlet moisture content measured value and the inlet flow measured value without considering the running time of the material in the conditioning machine and the influence of the steam in the conditioning machine on the moisture content of the material; the water adding flow adjustment value is a water adding flow value calculated considering the running time of the material in the conditioning machine and the influence of the steam in the conditioning machine on the moisture content of the material.

[0042] By using the above technical solution, the water adding flow value is calculated by detecting the relevant parameters of the material at the inlet of the conditioning machine, so that the moisture content of the material entering the conditioning machine can be adjusted in time. Compared with the prior art in which the water adding flow value is determined by detecting the relevant parameters of the material at the outlet of the conditioning machine, the embodiment can eliminate the hysteresis of the moisture content adjustment of the material in the prior art, so that the moisture content of all the materials entering the conditioning machine can be adjusted in time and effectively. In addition, the water adding flow is calculated according to the motor frequency and the steam pressure value in the embodiment, so that the running time of the material in the conditioning machine and the influence of the steam in the conditioning machine on the moisture content of the material can be considered, so that the calculation result of the water adding flow is more accurate.

[0043] Exemplarily, the outlet moisture content target value is 30%, and the inlet moisture content measured value and the inlet flow measured value of different batches of materials can be different, for example, the inlet moisture content measured value of a batch of materials is 12% and the inlet flow measured value of the materials is 2000 kg / h, and the inlet moisture content measured value of another batch of materials is 13% and the inlet flow measured value of the materials is 2500 kg / h. Further, the first function formula is:

[0044]

[0045] wherein W1 is the water adding flow basic value, in kg / h, λ 出 is the outlet moisture content target value, λ 入is the inlet moisture content measurement value, H is the inlet flow measurement value, unit: kg / h, and a is the moisture correction factor. In the actual production process, the moisture in the moisture regenerator has a certain influence on the outlet moisture content of the material. The embodiment of the present application eliminates this influence by using the moisture correction factor a. The value of a is calculated by experiment. By stopping the addition of water and steam into the moisture regenerator, only the material is passed into the moisture regenerator, the moisture content absorbed by the material in the moisture regenerator is calculated according to the outlet moisture content, the inlet moisture content and the inlet flow, so as to calculate a. In the actual production process, a is a fixed value within a certain time. In the embodiment, the value of a is 0.37.

[0046] Further, the second functional expression is:

[0047]

[0048] wherein W2 is the water flow adjustment value, unit: kg / h, f is the frequency of the motor, unit: Hz, a1 is the frequency conversion coefficient, unit: , VP is the steam pressure value, unit: bar, a2 is the steam conversion coefficient, unit: , a 1、 a2 is calculated by simulation, a1 is , and a2 is .

[0049] Specifically, the frequency of the motor on the moisture regenerator is positively correlated with the rotating speed of the shaft and the spiral blade in the moisture regenerator. The greater the frequency value, the faster the rotating speed of the shaft and the spiral blade, the shorter the running time of the material in the moisture regenerator, and the shorter the time for the material to absorb moisture in the moisture regenerator. Therefore, the required water flow of the moisture regenerator is greater. The moisture regenerator has steam therein, which can increase the temperature and the moisture content of the material. The higher the steam pressure value in the moisture regenerator, the more the steam content in the moisture regenerator, and the smaller the required water flow of the moisture regenerator.

[0050] Further, the third functional expression is:

[0051]

[0052] wherein W is the total water flow, unit: kg / h, W1 is the water flow basic value, unit: kg / h, W2 is the water flow adjustment value, unit: kg / h, and β is the water flow correction value, unit: kg / h, and β is-20-20 kg / h.

[0053] Further, the moisture meter and the electronic belt scale are arranged at the inlet of the moisture regenerator. The moisture meter is used to detect the inlet moisture content measurement value, and the electronic belt scale is used to detect the inlet flow measurement value. The pressure gauge is arranged in the moisture regenerator, and is used to detect the steam pressure value.

[0054] Further, a frequency converter is arranged on the motor, and the frequency converter is used to control the rotating speed of the rotating shaft, and the frequency set by the frequency converter is the frequency of the motor.

[0055] The embodiment of the present application further discloses a computer readable storage medium, and the computer readable storage medium stores instructions, and the instructions are executed to perform the following processing.

[0056] S11: obtaining an outlet moisture content target value, an inlet moisture content measured value and an inlet flow measured value of the material;

[0057] S12: calculating a water adding flow basic value according to the outlet moisture content target value, the inlet moisture content measured value, the inlet flow measured value and a first function formula;

[0058] S13: obtaining a frequency of the motor and a steam pressure value in the moisture regaining machine;

[0059] S14: calculating a water adding flow adjusting value according to the frequency of the motor, the steam pressure value and a second function formula;

[0060] S15: calculating a total water adding flow according to the water adding flow basic value, the water adding flow adjusting value and a third function formula.

[0061] The computer instructions are executed by the processing unit to realize the processes of the water adding flow calculation method for the moisture regaining machine, and the same technical effects can be achieved, and the detailed processes are not repeated here. The computer storage medium is, for example, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0062] Although the present application has been illustrated and described with reference to certain preferred embodiments thereof, it should be understood by the skilled in the art that the foregoing is a further detailed description of the present application in connection with specific embodiments, and the specific embodiments do not limit the present application. The skilled in the art can make various changes in form and details, including making several simple deductions or substitutions, without departing from the spirit and scope of the present application.

Claims

1. A method for calculating water feeding flow rate for a conditioning machine, the conditioning machine being provided with a motor, a rotating shaft and a spiral blade, the motor being used to drive the rotating shaft and the spiral blade to rotate in the conditioning machine to deliver material from an inlet of the conditioning machine to an outlet of the conditioning machine, characterized in that, The method comprises: obtaining an outlet moisture content target value, an inlet moisture content measured value and an inlet flow measured value of the material; calculating a water addition flow basic value according to the outlet moisture content target value, the inlet moisture content measured value, the inlet flow measured value and a first function formula; obtaining a frequency of the motor and a steam pressure value in the moisture regaining machine; calculating a water addition flow adjustment value according to the frequency of the motor and the steam pressure value and a second function formula; calculating a total water addition flow according to the water addition flow basic value, the water addition flow adjustment value and a third function formula; the first function formula is: ， wherein W1 is the water addition flow rate base value in kg / h, λ 出 is the outlet moisture content target value, λ 入 is the inlet moisture content measured value, H is the inlet flow rate measured value in kg / h, and α is a moisture correction factor; the second function formula is: ， Wherein, W2 is the water flow adjustment value, unit: kg / h, f is the frequency of the motor, unit: Hz, α1 is the frequency conversion coefficient, unit: , VP is the steam pressure value, unit: bar, α2 is the steam conversion coefficient, unit: ; the third function formula is: ， wherein W is the total water addition flow, in kg / h, W1 is the water addition flow basic value, in kg / h, W2 is the water addition flow adjustment value, in kg / h, and β is a water addition flow correction value, in kg / h.

2. The water addition flow rate calculation method according to claim 1, characterized by: The moisture regaining machine is provided with a moisture meter and an electronic belt scale at the inlet, the moisture meter is used to detect the inlet moisture content measured value, the electronic belt scale is used to detect the inlet flow measured value, and the moisture regaining machine is internally provided with a pressure gauge, which is used to detect the steam pressure value.

3. The water addition flow rate calculation method according to claim 2, characterized by: The motor is provided with a frequency converter, which is used to control the rotating speed of the rotating shaft, and the frequency set by the frequency converter is the frequency of the motor.

4. The water addition flow rate calculation method according to claim 3, characterized by: The moisture correction factor is 0.

37.

5. The water addition flow rate calculation method according to claim 4, characterized by: The frequency conversion coefficients are .

6. The water addition flow rate calculation method according to claim 5, characterized by: The steam conversion factor is .

7. The water addition flow rate calculation method according to claim 6, characterized by: The water addition flow correction value is -20-20 kg / h.

8. A computer-readable storage medium, characterized in that, The computer readable storage medium stores instructions, which, when executed on the computer, cause the computer to execute the water addition flow calculation method of any one of claims 1-7.

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