Drying method of tobacco fila in the cigarette processing course

Abstract

The present invention discloses a cut tobacco -drying technics during processing cigarette, which comprises two steps: the first step is to balance the water content of cut tobacco to 20 percent, and the cut tobacco is guided into a pneumatic drier, wherein the technics air temperature in the first section of pneumatic drier is controlled between 80 and 100 DEG C, and that in the second section is controlled between 70 and 90 DEG C, then the cut tobacco with 20 percent water content is dried and the water content is lowered to about 14 to 16 percent; and the second step is that the dried cut tobacco is guided into a roller dry machine for the secondary drying procedure, wherein the temperature of the wall of the roller is controlled between 70 and 80 DEG C, to control the water content of the dried cut tobacco between 12.0 percent and 13.0 percent. The present invention can not only improve both the uniformity of the water content and temperature stability of the processed tobacco with increased filling capability of the dried tobacco, but also reduce the loss of the fragrance of tobacco, to significantly decrease the content of injurious ingredients contained in cigarette such as tar, smoke and nicotine.

Description

technical field [0001] The invention relates to a material drying process, in particular to a leaf shred drying method in the cigarette processing process. Background technique [0002] Drying is the most important production link in the cigarette processing process. Its basic task is to remove part of the moisture in the tobacco material, improve its filling capacity and processing resistance, and at the same time improve the flavor of the tobacco material and reduce irritation and miscellaneous gas. [0003] There are two main drying methods for tobacco materials. One is the convective drying method, which achieves the purpose of drying and dehumidification through the convective heat transfer between the high-temperature air flow and the leaf (stem) silk. The other is the conductive drying method, which achieves the processing quality requirements through the slow conduction between the drum wall and the leaf silk. Regardless of the airflow drying method or the drum dryi...

AI Technical Summary

Problems solved by technology

[0004] In the traditional processing process, it is limited to improve the flavor absorption of shredded leaves by adjusting the processing parameters of the equipment

A large number of experiments have shown that for medium and high-grade high-quality leaf silk, when the process gas treatment temperature is higher than 100°C, the aroma of the dried leaf silk will be significantly worse, and the amount of aroma will also be significantly reduced. Obviously, only by adjusting the existing drying The process parameters in the method cannot meet the lower processing intensity requirements, and cannot meet the quality requirements of leaf shred moisture and odor absorption at the same time

On the other hand, neither the convection drying method nor the drum drying method can simultaneously solve the prominent contradiction between reducing the moisture content, temperature fluctuation and improving the silk filling capacity.

Specifically, the airflow drying method uses a process airflow above 130 ° C. Although it can significantly improve the filling capacity of the leaf silk, the moisture content and temperature of the leaf silk after treatment fluctuate greatly, and the uniformity is poor; the drum drying method is mainly through The temperature of the cylinder wall above 140°C is used to dry the shreds, although it can reduce the moisture content and temperature fluctuation of the outlet shreds, but it cannot achieve a better filling capacity

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