Moisture control method and system in rehumidification and humidification process based on multiple regression

Abstract

The invention discloses a method for controlling moisture in a moisturizing and humidifying process based on multiple regression. The method includes the following steps: obtaining relevant data of tobacco chips in the moisturizing and humidifying process, judging the working conditions of the moisturizing and humidifying equipment, and when the inlet moisture content, the mass flow of the tobacco chips, When the hot air temperature, steam flow, hot air opening, drum rotation speed and steam pressure are in normal working state, the moisture content in the re-humidification process is controlled. Based on the method and system of the present invention, a mathematical model of the process is established according to the mathematical relationship between the relevant variables in the moisturizing and humidifying process, and the multiple regression method is used to analyze the historical data of the moisturizing and moisturizing process, and the time-varying parameters in the model are identified in real time. Finally, the amount of water added is obtained through the mathematical model of the process, the target moisture content of the tobacco sheet outlet and the measured process variable value, and finally the goals of stabilizing the tobacco sheet outlet moisture content, improving the tobacco sheet qualification rate and reducing the cigarette production cost are achieved.

Description

technical field [0001] The present invention relates to the technical field of control of the moisture resurgence and humidification process, in particular to a moisture control method and system for the rehumidification and humidification process based on multiple regression. Background technique [0002] The moisture regain and humidification process mainly includes the loose moisture regain process, the flavoring and feeding process, and the temperature increasing and humidifying process. It is an important processing procedure for moisture control in the tobacco industry. The outlet moisture content is an important technical index in the humidification process, and its process stability has a direct impact on the subsequent process index. At present, there are many problems in the control of outlet moisture content in the humidification process, the most prominent are three points: First, due to the time delay in the humidification process itself, the humidification cont...

AI Technical Summary

Problems solved by technology

At present, there are many problems in the control of outlet moisture content in the humidification process, the most prominent are three points: First, due to the time delay in the humidification process itself, the humidification control system cannot adjust the water content according to the outlet moisture content measured in real time The size, which affects the stability of the outlet moisture content

Second, because the water absorption capacity of the tobacco sheets on the silk production line is not completely consistent, even the physical properties of the same batch of tobacco sheets are different, so that the moisture control system of the moisture regain and humidification control equipment cannot be based on the mathematical model of the moisture regain and humidification process. The measured variable value can be used to obtain the optimal water addition amount at this time, which affects the stability of the outlet moisture content.

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