The control method for stabilizing the humidity of the hot air drying drum-type shredded tobacco

Abstract

Disclosed is a control method used for stabilizing drum-type cut tobacco drying hot air humidity. A device comprises a fresh air temperature and humidity detection device controlled by a PID (proportion, integration and differentiation) control unit, and a steam applying control device, the fresh air temperature and humidity detection device is connected with an air quantity control system and a hot air temperature control system and feeds temperature and humidity detection values of fresh air back to the PID control unit, the steam applying control device is connected with the hot air temperature control system through a steam spraying pipeline, steam applying quantity of the steam applying control device is controlled by the PID control unit, the PID control unit sets a control value of fresh air humidity to be 85%RH (25 DEG C), calculates the steam applying quantity according to the fresh air quantity and the temperature and humidity detection values which are fed back, and controls the steam applying control device to complete steam applying. By the device and the method, the effect that humidity of cut tobacco in the process of drum drying is free of influences of seasons and weather conditions can be realized, process parameters of drum drying can be stabilized, and stability of sensory quality of dried cut tobacco is guaranteed.

Description

technical field [0001] The invention relates to a method for controlling tobacco processing equipment, in particular to a method for controlling the humidity of hot air for drying shredded tobacco with drums in the tobacco drying link during the tobacco processing process. Background technique [0002] Cut tobacco drying process is one of the key processes in the production process of cigarette shreds. In this process, the shredded tobacco is fully loosened by drying and dehumidification, and a certain curl is produced to increase the filling capacity of the shredded tobacco. The drum device has the advantages of large processing capacity, flexible operation, and relatively low cost, and has become the main method for drying materials in the tobacco shred process. [0003] The process of moisture diffusion from the surface of shredded tobacco to hot air is an important link in the drying and mass transfer of materials in the drum. The main driving force of this mass transf...

AI Technical Summary

Problems solved by technology

In the actual production process, under different seasons and weather conditions, even if other process conditions are completely the same, due to the huge difference in the humidity of the air in the environment, the average fluctuation range of the drum wall temperature reaches 10 ℃, which has a great impact on the sensory quality of dried tobacco. some impact on stability

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