Air-flowing type dried tobacco water control method

Abstract

The invention relates to an air-flowing type dried tobacco water control method, which comprises the following steps of: measuring water at an inlet of an air-flowing type tobacco drying machine by a water meter arranged at the inlet of the air-flowing type tobacco drying machine, adjusting a first parameter of tobacco flow at the inlet by a feed forward control algorithm, and sending the first parameter to an electronic belt balance; measuring water at an outlet of the air-flowing type tobacco drying machine by a water meter arranged at the outlet of the air-flowing type tobacco drying machine, and obtaining a second parameter of the tobacco flow at the inlet according to results of the water meters and outlet water setting values; and sending the first parameter and the second parameter to the electronic belt balance at the front end of the air-flowing type tobacco drying machine, wherein the electronic belt balance adjusts the tobacco flow at the inlet by responding the first parameter and the second parameter sequentially or simultaneously. By a feed forward and feed back control mode, the standard drop of the water at the outlet of the air-flowing type tobacco drying machine is about 0.2, and a technical standard can be met.

Description

technical field [0001] The invention relates to a method for controlling the moisture of cut tobacco in the tobacco manufacturing industry, in particular to a method for controlling the moisture of cut tobacco by airflow drying. Background technique [0002] In the current production of shredded cigarettes, the moisture control of the air-flow shred dryer is to control the moisture of the cut tobacco at the outlet by adjusting the flow rate of the inlet cut tobacco. There are two control methods: 1. Feedforward control; 2. Feedback control. [0003] Feedforward control is based on the principle of invariance and belongs to open-loop control. If the main external disturbance parameters that cause large fluctuations in the output are measurable and controllable, the external disturbance signal can be used to directly control the output (implement feedforward control), such as figure 1 shown. [0004] Feedback control refers to the process of returning the output information ...

AI Technical Summary

Problems solved by technology

The moisture content of the inlet shredded tobacco in different batches of the same brand is not static. When the set value of the dehydration amount is constant, the outlet moisture will deviate from the set value for a long time, and the control effect cannot be achieved.

[0006] The main problem of feedback control is time lag and fluctuation, that is, there may be a time delay between the discovery of the deviation and the taking of corrective measures. When the correction is made, the actual situation may have changed a lot, and it is often a loss It has already been caused, and if the gain is not selected properly, it will cause system instability

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