A control method for adjusting moisture content and temperature of tobacco leaves

Abstract

The invention relates to a tobacco moisture content and temperature regulation control method, and belongs to re-drying and primary production techniques in the tobacco processing industry. Under the conditions of uncertain moisture content and temperature of tobacco processing material, especially, the control method is a procedure control technology having definite process requirements on the moisture content and temperature of processed tobacco. The control method comprises the following process steps: A) before feeding production, inspecting process conditions including air pressure, steam and water pressure; B) feeding the moisture content and temperature of the tobacco back to a control system when the tobacco flows through a moisture online detector and a temperature monitoring device at an equipment outlet, and controlling the control system to perform processing. On the basis of present situation of the re-drying and primary production techniques in the tobacco industry, the control method utilizes hot wind to properly dry and humidify the tobacco, and achieves PID regulation closed-loop control.

Description

technical field [0001] The invention relates to a control method for adjusting the moisture content and temperature of tobacco leaves, which belongs to the production technology of tobacco rebaking and shredded tobacco in the tobacco processing industry. Especially in the case of uncertain moisture content and temperature of the incoming material in tobacco leaf processing, it is a process control technology that has clear process requirements for the moisture content and temperature of tobacco leaves after processing. Background technique [0002] In the production of tobacco rebaking and shredded tobacco, the requirements for controlling the moisture content and temperature of tobacco leaves are relatively high, and the production environment has a large space, especially when a large amount of steam and water are used and discharged during the production process, resulting in an uncontrollable indoor environment. . For some processes that need to process tobacco leaves t...

AI Technical Summary

Problems solved by technology

[0002] In the production of tobacco rebaking and shredded tobacco, the requirements for controlling the moisture content and temperature of tobacco leaves are relatively high, and the production environment has a large space, especially when a large amount of steam and water are used and discharged during the production process, resulting in an uncontrollable indoor environment.

For some processes that need to process tobacco leaves that have been exposed to the environment for a long time, there is uncertainty in the moisture content and temperature of the tobacco leaves in the previous process, and it is difficult to effectively control them during the processing

At present, the commonly used treatment methods include adding a heating and humidifying machine, or storing the tobacco leaves of the previous process in a closed space with constant temperature and humidity. It is obviously not suitable to treat tobacco leaves with high moisture content due to the environment in the pre-processing process. In addition, because only open-loop control is adopted in the warming and humidification link, there is also poor controllability of tobacco leaf moisture content and temperature, which is difficult to meet the actual production process requirements. ; The latter has to isolate another closed space at the production site due to the increase of tobacco leaf storage, environmental temperature and humidity control and other related equipment and facilities, which brings inconvenience to the on-site logistics, and thus causes a large investment

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