A thin-plate cylinder drying machine barrel temperature pass rate control method

Abstract

The application discloses a thin-plate drum drying machine cylinder temperature qualified rate control method, which comprises the following steps: step S1: collecting the change of the inlet moisture of the drying machine when the cylinder temperature meets the standard set value under different seasonal conditions within one year, and establishing a mathematical model of seasonal change and the inlet moisture suitable value; step S2: collecting the change of the inlet moisture of the drying machine when the cylinder temperature meets the standard set value under the conditions of sunny day, cloudy day and rainy day in the same season of the current year, and establishing a mathematical model of different weather and the inlet moisture suitable value; and step S3: collecting the change of the inlet moisture of the drying machine when the cylinder temperature meets the standard value at different batches on the same day, and establishing a mathematical model of different batches and the inlet moisture suitable value. According to the phenomenon that the cylinder temperature of the drying machine is greatly fluctuated due to the influence of environmental factors, the mathematical model of the material moisture suitable value is established under the condition that the cylinder temperature meets the standard value according to the seasons, weather and batches, so that the set values of the loose moisture rehydration water adding ratio and the secondary feeding outlet moisture of the tobacco leaf section are sequentially controlled in a reverse direction, and the cylinder temperature qualified rate of the thin-plate drum drying machine is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of temperature control of thin-plate drum type cut tobacco dryer, and particularly relates to a thin-plate drum type cut tobacco dryer cylinder temperature qualified rate control method. BACKGROUND

[0002] In the tobacco industry, the thin-plate drum type cut tobacco dryer process has always been the focus of enterprises as a key process of cut tobacco production, and how to produce stable quality cut tobacco is a long-term research problem of enterprises. In the non-constant temperature and humidity cut tobacco workshop environment, the seasonal change, weather change and daily production batch influence will cause the cylinder temperature of the cut tobacco dryer to change, and according to the process requirements, the thin-plate drum type cut tobacco dryer cylinder temperature requirement set value ± 3 is qualified. However, in the actual operation process, the weather is cold in winter, the workshop environment temperature is low, and when the inlet moisture of the cut tobacco is consistent, the cylinder temperature of the thin-plate drum type cut tobacco dryer will be high; when the season does not change, under the conditions of sunny day, cloudy day and rainy day, when the inlet moisture of the cut tobacco is consistent, the cylinder temperature of the thin-plate drum type cut tobacco dryer will be high; on the same day, the first batch production and the second batch production, when the inlet moisture of the cut tobacco is the same, the first batch cylinder temperature is 1 DEG C higher. Therefore, the working parameters of the cut tobacco dryer obtained by using the traditional method have certain irrationality, and in the actual production process, if the outlet moisture meets the process requirements, the cut tobacco dryer must adjust the cylinder wall temperature after the actual moisture feedback to adjust the cut tobacco process, which will cause the cut tobacco dryer adjustment process to be long and affect the product quality.

[0003] Therefore, the present application provides a thin-plate drum type cut tobacco dryer cylinder temperature qualified rate control method to solve the above problems. SUMMARY

[0004] The purpose of the present application is to overcome the deficiencies in the prior art, provide a thin-plate drum type cut tobacco dryer cylinder temperature qualified rate control method to solve the problem of large control error of the cylinder temperature of the cut tobacco dryer under the existing conditions, collect data according to the moisture change of different seasons, different weather and the first batch production and the second batch production of the same day, establish a related mathematical relationship model, consider the multiple factors affecting the cylinder temperature of the cut tobacco dryer, monitor the cylinder temperature of the environment under different factors, thereby multi-dimensionally integrate data, establish a control system, control the setting value of the loose moisture adding water ratio of the leaf making section and the secondary feeding outlet moisture, match the system standard value / set value, ensure the matching of the inlet moisture of the cut tobacco and the cylinder temperature, and thereby improve the qualified rate of the cylinder temperature of the thin-plate drum type cut tobacco dryer.

[0005] The present application is based on the phenomenon that the cylinder temperature of a cut tobacco dryer is greatly affected by environmental factors, and according to different seasons, weather and batches, a mathematical model of material moisture suitable value is established under the condition that the cylinder temperature meets the standard value, so as to inversely control the setting value of the loose moisture adding water ratio of the cut tobacco section and the secondary feeding outlet moisture, and improve the cylinder temperature qualified rate of the thin plate type cylinder dryer.

[0006] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present application is:

[0007] A thin plate type cylinder dryer cylinder temperature qualified rate control method, comprising the following steps:

[0008] Step S1: Collect the change of the inlet moisture of the cut tobacco dryer when the cylinder temperature of the thin plate type cylinder dryer is close to / meets the standard setting value under the change of different seasons within a year, and establish a relevant mathematical relationship model between different seasons and the inlet moisture of the cut tobacco dryer based on the standard setting value of the cylinder temperature;

[0009] Step S2: Collect the change of the inlet moisture of the cut tobacco dryer when the cylinder temperature of the cut tobacco dryer is close to / meets the standard setting value under the condition of sunny, cloudy and rainy days in the same season of the current year, and establish a relevant mathematical relationship model between sunny, cloudy and rainy days and the inlet moisture of the cut tobacco dryer in the same season based on the standard setting value of the cylinder temperature;

[0010] Step S3: Collect the change of the inlet moisture of the cut tobacco dryer when the cylinder temperature of the thin plate type cylinder dryer is close to / meets the standard setting value in the first batch and the second batch of production in the morning when the thin plate type cylinder dryer is started in the morning, and establish a relevant mathematical relationship model between different production batches of the same day and the inlet moisture of the cut tobacco dryer based on the standard setting value of the cylinder temperature;

[0011] Step S4: The statistical / analysis results of steps S1 to S3 are summarized to establish a multi-dimensional mathematical relationship model;

[0012] Step S5: According to the mathematical relationship model in step S4, a control system is established to control the setting value of the secondary feeding outlet moisture of the cut tobacco section, so as to ensure that the inlet moisture of the cut tobacco matches the cylinder temperature of the cylinder dryer, and ensure that the cylinder temperature of the cylinder dryer is within the set value range.

[0013] Further, a moisture meter is installed at the inlet of the cut tobacco dryer during the cutting process to monitor the change of the inlet moisture.

[0014] Further, when the cut tobacco drying machine is running, steam enters the thin plate interlayer in the drying drum through the pipeline system after the rotary joint, and continuously indirectly heats the cut tobacco; hot air enters the drying drum from the front chamber and the rear chamber, and the wet material is dispersed in the drying flue gas under the action of the scraper plate, moves forward, and the wet material is heated by the heat carrier, so that the material directly obtains heat from the air flow, and the moisture is vaporized, so that the drying is accelerated and the uniform drying of the material is ensured.

[0015] Further, the drying process of the cut tobacco drying machine is theoretically calculated, and by properly setting the hot air damper flow, hot air temperature, HT steam pressure, drying drum speed, hot air damper opening and outlet negative pressure parameter values, the fluctuation of the drying drum wall temperature can be reduced and the drying drum wall temperature can be adjusted.

[0016] Further, the data of the thin plate drum temperature control of the drum cut tobacco drying machine is analyzed by using Matlab software, and the standard setting value of the drum temperature of the cut tobacco drying machine is obtained.

[0017] Further, the cut tobacco drying machine takes a series of parameters such as the feed flow, the feed moisture, the drying factor and the outlet cut tobacco moisture setting value as the front feedback value of the thin plate drum wall temperature of the cut tobacco drying machine, and takes the difference between the actual moisture and the setting value of the outlet cut tobacco moisture as the rear feedback value, and establishes an actual moisture feedback control.

[0018] Compared with the prior art, the thin plate drum cut tobacco drying machine drum temperature qualified rate control method has the following beneficial effects:

[0019] The present application collects data and establishes a relevant mathematical relationship model by considering the different moisture changes of the first batch production and the second batch production of the same day under different seasons and different weathers, monitors the drum temperature of the environment under different factors, thereby multi-dimensionally integrates data, establishes a control system, controls the setting value of the loose moisture adding water ratio of the leaf making section and the secondary feeding outlet moisture, matches the system standard value / setting value, ensures the matching of the cut tobacco inlet moisture and the drum temperature, thereby improves the thin plate drum cut tobacco drying machine drum temperature qualified rate. Considering various influencing factors and according to the actual influencing factors, the temperature of the cut tobacco drying machine is adjusted to obtain the best setting parameters of the cut tobacco drying machine, thereby improving the accuracy of the front feedback mathematical relationship model of the cut tobacco drying process control, reducing the fluctuation range of the outlet cut tobacco moisture of the cut tobacco drying process, improving the internal quality of the cut tobacco product, and achieving the effects of reducing consumption and stabilizing and improving product quality. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The present application is a thin plate drum cut tobacco drying machine drum temperature qualified rate control method flowchart. DETAILED DESCRIPTION

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] The present invention will now be described in further detail with reference to the accompanying drawings.

[0023] like Figure 1 As shown, a method for controlling the qualified rate of the drum temperature in a thin-plate drum drying machine includes the following steps:

[0024] Step S1: Collect data on the changes in inlet moisture of the thin-plate drum drying machine under different seasonal variations throughout the year, when the drum temperature is close to / meets the standard set value. Establish a mathematical relationship model between different seasons and inlet moisture of the drying machine based on the standard set value of the drum temperature.

[0025] Step S2: Collect data on the changes in moisture content at the inlet of the drying machine under three weather conditions (sunny, cloudy, and rainy) within the same season of the year, when the drum temperature of the drying machine is close to or meets the standard set value. Establish a mathematical relationship model between the moisture content at the inlet of the drying machine and sunny, cloudy, and rainy days within the same season, based on the standard set value of the drum temperature.

[0026] Step S3: When the thin-plate roller drying machine is turned on every morning, collect the changes in the moisture content at the inlet of the drying machine during the first and second batches of production, when the temperature of the drying machine cylinder is close to / meets the standard set value. Establish a mathematical relationship model between different production batches on the same day and the moisture content at the inlet of the drying machine, based on the standard set value of the cylinder temperature.

[0027] Step S4: Summarize the statistical / analysis results of steps S1 to S3 and establish a multi-dimensional mathematical relationship model;

[0028] Step S5: Based on the mathematical relationship model in Step S4, establish a control system to control the set value of the moisture content at the secondary feeding outlet of the leaf-making section, ensuring that the moisture content at the inlet of the drying drum matches the temperature of the drum drying machine, and ensuring that the temperature of the drum drying machine is within the set value range.

[0029] Furthermore, during the drying process, a moisture meter is installed at the inlet of the drying machine to monitor changes in moisture content at the inlet.

[0030] Further, when the cut tobacco drying machine is running, steam enters the thin plate interlayer in the drying cylinder through the pipeline system after the rotary joint, and continuously indirectly heats the cut tobacco; hot air enters the drying cylinder from the front chamber and the rear chamber, and the wet material is dispersed in the drying flue gas under the action of the scraper plate, moves forward, and the wet material is heated by the heat carrier, so that the material directly obtains heat from the air flow, and the moisture is vaporized, so that the drying is accelerated and uniform drying of the material is ensured.

[0031] Further, the drying process of the cut tobacco drying machine is theoretically calculated, and by properly setting the parameters such as hot air damper flow, hot air temperature, HT steam pressure, drying cylinder speed, hot air damper opening, and outlet negative pressure, the fluctuation of the drying cylinder wall temperature can be reduced, and the drying cylinder wall temperature can be adjusted.

[0032] Further, the data of the thin plate cylinder temperature control of the drum cut tobacco drying machine is analyzed by using Matlab software, and the standard setting value of the drying cylinder temperature of the cut tobacco drying machine is obtained.

[0033] Further, the cut tobacco drying machine takes a series of parameters such as the feed flow, the feed moisture, the drying factor, and the outlet cut tobacco moisture setting value as the front feedback value of the thin plate cylinder wall temperature of the cut tobacco drying machine, and takes the difference between the actual moisture and the setting value of the outlet cut tobacco moisture as the rear feedback value, and establishes an actual moisture feedback control / regulation.

[0034] The working principle / technical effect of the thin plate drum cut tobacco drying machine cylinder temperature qualified rate control method is:

[0035] The present application collects data according to the different seasons, different weather, and different moisture changes of the first batch production and the second batch production on the same day, establishes a related mathematical relationship model, considers multiple factors that affect the drying cylinder temperature, monitors the cylinder temperature in different environments, thereby integrates data in multiple dimensions, establishes a control system, controls the setting value of the loose rehydration water ratio of the leaf making section and the secondary feeding outlet moisture, matches the system standard value / setting value, ensures that the cut tobacco inlet moisture matches the cylinder temperature, thereby improving the cylinder temperature qualified rate of the thin plate drum cut tobacco drying machine. Considering multiple influencing factors and summarizing the actual influencing factors, the temperature of the cut tobacco drying machine is adjusted to obtain the best setting parameters of the cut tobacco drying machine, thereby improving the accuracy of the front feedback mathematical relationship model of the cut tobacco drying process control, reducing the fluctuation range of the outlet cut tobacco moisture, improving the internal quality of the cut tobacco product, and achieving the effects of reducing consumption and stabilizing product quality.

[0036] The above embodiments are illustrative of the present application, but are not limiting of the present application. It can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the protection scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A method for controlling the qualified rate of drum temperature in a thin-plate type drum drying machine, comprising the following steps: Step S1: Collect data on the changes in inlet moisture of the thin-plate drum drying machine under different seasonal variations throughout the year, when the drum temperature is close to / meets the standard set value. Establish a mathematical relationship model between different seasons and inlet moisture of the drying machine based on the standard set value of the drum temperature. Step S2: Collect data on the changes in moisture content at the inlet of the drying machine under three weather conditions (sunny, cloudy, and rainy) within the same season of the year, when the drum temperature of the drying machine is close to or meets the standard set value. Establish a mathematical relationship model between the moisture content at the inlet of the drying machine and sunny, cloudy, and rainy days within the same season, based on the standard set value of the drum temperature. Step S3: When the thin-plate roller drying machine is turned on every morning, collect the changes in the moisture content at the inlet of the drying machine during the first and second batches of production, when the temperature of the drying machine cylinder is close to / meets the standard set value. Establish a mathematical relationship model between different production batches on the same day and the moisture content at the inlet of the drying machine, based on the standard set value of the cylinder temperature. Step S4: Summarize the statistical / analysis results of steps S1 to S3 and establish a multi-dimensional mathematical relationship model; Step S5: Based on the mathematical relationship model in step S4, establish a control system to control the set value of the moisture content at the secondary feeding outlet of the leaf-making section, ensuring that the moisture content at the inlet of the drying drum matches the temperature of the drum drying machine, and ensuring that the temperature of the drum drying machine is within the set value range. In the tobacco drying machine, a moisture meter is installed at the inlet to monitor moisture changes. During operation, steam travels through the pipeline system to the rotary joint and then into the thin-plate jacket inside the drying cylinder, continuously providing indirect heating to the tobacco. Hot air enters the drying cylinder from the front and rear chambers. The wet material, dispersed in the drying flue gas by the lifting plates, moves forward, receiving heat from the heat carrier. The material directly obtains heat from the airflow, while moisture vaporizes, accelerating drying and ensuring uniform drying. The drying process of the tobacco drying machine is theoretically calculated. Appropriate settings of parameters such as superheated air damper flow rate, hot air temperature, steam pressure, drying drum speed, hot air damper opening, and outlet negative pressure can both reduce fluctuations in the drum wall temperature and adjust the drum wall temperature. Matlab software is used to analyze data on the thin-plate drum temperature control of the drum drying machine to obtain the standard setpoint for the drum temperature. The drying machine uses a series of parameters, including feed flow rate, feed moisture content, drying factor, and outlet tobacco moisture content setpoints, as the front feedback value for the thin-plate drum temperature, and the difference between the actual moisture content of the outlet tobacco and the setpoint as the back feedback value, thus establishing actual moisture feedback control.

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