Control method for improving stability of moisture content of cut tobaccos

Abstract

The invention relates to a control method for improving the stability of the moisture content of cut tobaccos. The method comprises the following steps: computing the mean values of the process air flow and the moisture content of the incoming cut tobaccos in the previous batch and storing the mean values as the process air flow and the moisture content of the incoming cut tobaccos in the previous batch respectively; acquiring the mean moisture content of the cut tobaccos in the current batch in the preset time slot before the cut tobaccos enter into a cut tobacco drying drum, using the mean moisture content as the moisture content of the incoming cut tobaccos in the current batch and subtracting the moisture content of the incoming cut tobaccos in the current batch from the moisture content of the incoming cut tobaccos in the previous batch to obtain the difference; multiplying the difference by the preset adjustment coefficient to obtain the variation of the process air flow; addingthe process air flow in the previous batch and the variation of the process air flow, multiplying the obtained value by the preset prepared air flow coefficient, using the obtained result as the prepared air flow in the current batch and automatically sending the prepared air flow in the current batch to a system. The method has the following beneficial effects: proper prepared air flow parametervalue is set to ensure that the system can rapidly enter into the stable state, thus better controlling the over-dried cut tobaccos, improving the use ratio of the cut tobaccos and effectively reducing consumption.

Description

technical field [0001] The invention relates to the control technology of the shredded cigarette processing process, in particular to a control method for improving the stability of the moisture content of shredded tobacco in the shredded shredded drying process. Background technique [0002] The silk drying process is the core link of the silk making process. The drum drying is the most widely used and the most traditional leaf drying method in the tobacco industry. During the drying process, the leaf silk is dried through the combination control of various parameters. The dehumidification treatment can achieve the homogenization and coordination of the sensory quality and physical quality of leaf silk. [0003] Generally, the factors affecting the stability of moisture content in the drum drying process can be divided into two types, one is uncontrollable for the silk drying machine itself, which is called external factors, and the other is uncontrollable for the silk dryi...

AI Technical Summary

Problems solved by technology

[0006] The drum type silk dryer needs to set a preparatory air volume or preparatory pressure in the preparation stage. Whether the set value is appropriate or not has a great influence on the time required for the silk dryer to enter a stable state. Currently, the preparatory air volume or preparatory pressure is manually adjusted. Due to the fact that the moisture content of the actual cut tobacco and the change of the ambient temperature of the day are not known, sometimes there will be a large deviation between the set air volume or preparation pressure and the actual value, resulting in more unqualified cut tobacco

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