Process air temperature control system and method of air flow drying machine

Abstract

The invention relates to a process air flow control system and method for an air flow cut tobacco direr. The system comprises a burning furnace temperature controller, an executor and a burning furnace oil valve; the burning furnace temperature controller provides a control signal to the executor by a burning furnace temperature control loop; the system also comprises a process air flow temperature control loop which is used for adjusting the burning furnace temperature setting valve supplied to the burning furnace temperature controller according to the difference value between the process air flow temperature measured from the process air flow pipeline of an inlet of a drying tower and the process air flow temperature setting value. The burning furnace temperature setting value of the burning furnace temperature controller is adjusted according to the difference value between the process air flow temperature at the inlet of the drying tower and the setting value, so the process air flow temperature of the air flow cut tobacco drier is changed to a process control point from a monitoring point, the following property of the process air flow temperature is improved, the process standards are met and the product quality is effectively ensured.

Description

technical field [0001] The invention relates to the field of tobacco processing, in particular to a system and method for controlling the air temperature of an air flow drying machine. Background technique [0002] Shredded drying is one of the key processes in the production process of shredded cigarettes. Its purpose is to remove excess moisture and miscellaneous gases in shredded tobacco, improve the filling capacity of shredded tobacco, and thereby improve the intrinsic quality of shredded tobacco. Airflow drying machine is a cigarette equipment that dries shredded tobacco through high-temperature airflow, which has great advantages in processing large quantities of shredded tobacco. [0003] Such as figure 1 Shown is a schematic structural view of an existing airflow drying machine. This kind of airflow drying machine uses constant dehydration to control the moisture content of cut tobacco, which requires high temperature stability of the process airflow before enteri...

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Problems solved by technology

but if figure 2 As shown, in the temperature control process of the existing airflow drying machine, the process air temperature B is always difficult to be stably controlled at the temperature setting value A during the adjustment process, so it cannot meet the process requirements

[0004] The inventor found that the reason why the existing airflow drying machine process airflow temperature control system is difficult to meet the process requirements is because its control system actually controls the airflow temperature at the outlet of the combustion furnace, while the process control point required by the production is the drying tower entrance This results in the current control system not performing feedback control on the inlet process air temperature required by the process, but only monitoring the process air temperature at the inlet of the drying tower, which results in the system control point and process control Points do not match, and then the operator needs to manually adjust the temperature setting value of the combustion furnace in the production process in order to meet the process requirements, resulting in large fluctuations in the temperature of the process airflow during the production process

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