Moisture balance based cut tobacco moisture content control method for drum-type cut tobacco drier

Abstract

The invention discloses a moisture balance based cut tobacco moisture content control method for a drum-type cut tobacco drier. According to the method, real-time moisture content of hot blast at an inlet of the cut tobacco drier and moisture content of moisture eliminating air at an outlet of the cut tobacco drier are obtained respectively, and real-time mass flow rate of cut tobacco at the inletof the cut tobacco drier, wet-based moisture content of the cut tobacco at the inlet of the cut tobacco drier, wet-based moisture content of the cut tobacco at the outlet of the cut tobacco drier, air density of a workshop and air density of the moisture eliminating air are obtained by measuring. A theoretical value of moisture eliminating air volume of the cut tobacco drier is calculated on thebasis of the moisture balance principle according to the obtained data, and fan operation frequency of the cut tobacco drier is adjusted in real time to enable current moisture eliminating air volumevalue of the cut tobacco drier to be consistent with the theoretical value of the moisture eliminating air volume. The adjusting and reaction speeds are higher, response speed of a control system is increased effectively, and quality difference of cut tobacco in the same batch in processing is avoided to a greater extent.

Description

technical field [0001] The invention relates to the technical field of tobacco processing, in particular to a method for controlling the moisture content of shredded tobacco of a drum type shred dryer based on moisture balance. Background technique [0002] Drying cut tobacco is an important process in the production process of cut tobacco. Only by heating and drying cut tobacco to control the moisture content within a certain range can the elasticity and filling capacity of cut tobacco be satisfied. Drum type shred drying machine is a common shred drying equipment in China. It provides drying heat source for shredded tobacco through steam-heated cylinder wall and hot air. Steam, the water vapor emitted by the shredded tobacco is taken out from the tide outlet by the hot air that runs through the entire shredded dryer, thereby completing the dehydration and drying process of the shredded tobacco. [0003] At present, when the drum-type shred dryer is drying shredded tobacco...

AI Technical Summary

Problems solved by technology

In order to ensure the moisture content of the exported shredded tobacco, it is sometimes necessary to increase the temperature of the tube wall or the hot air. The change of the temperature of the tube wall or the hot air will cause fluctuations in the quality characteristics of the shredded tobacco, which will have a great impact on the quality of the cigarette. Increasing the temperature of the tube wall or the hot air will also cause The energy consumption is too high, and there is a certain hysteresis in the change of the wall or hot air temperature

Therefore, the control method of dehydration and drying of shredded tobacco only by changing the temperature of the sheet or the temperature of the hot air cannot meet the higher requirements of the process quality.

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