Dry method of cigarette tobacco

Abstract

The invention discloses a dry method of a cigarette tobacco. The dry method of the cigarette tobacco comprises two steps of prefreezing and drying. The prefreezing comprises the following steps: arranging the tobacco in a low temperature environment, and enabling the surface temperature of the tobacco to reach minus 10 to minus 20 DEG C and keep 5 to 10 minutes. The drying comprises the following step: drying the prefreezed tobacco in 40 to 70 DEG C to 12.5-12.8 % of moisture content. The drying temperature is far below 100 DEG C, fragrance of the tobacco can be retained to the largest extent, fluctuation of moisture and temperature of the processed tobacco is reduced, filling power of dried tobacco is notably increased, loss of quantity and quality of the fragrance of the tobacco is reduced, meanwhile, analyzing of the drying step is saved, and large loss of bound water is avoided.

Description

technical field [0001] The invention belongs to the technical field of cigarette manufacture, and in particular relates to a method for drying shredded cigarette leaves. Background technique [0002] Drying is an important link in the production process of shredded tobacco leaves. Its main task is to remove the moisture in the tobacco material, improve the filling and processing resistance, improve the taste of the tobacco material, and reduce the irritation and miscellaneous gas. [0003] There are two main methods for drying shredded leaves: one is air-flow drying, which achieves the purpose of drying through the convective heat transfer between high-temperature airflow and shredded leaves; Processing requirements. Whether it is air drying or drum drying, there are the following disadvantages: First, the process temperature is relatively high, generally must be greater than 130 ° C, in order to make the moisture content of the leaf silk with a moisture content of 18% to 2...

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Problems solved by technology

Whether it is air drying or drum drying, there are the following disadvantages: First, the process temperature is relatively high, generally must be greater than 130 ° C, in order to make the moisture content of the leaf silk with a moisture content of 18% to 25% reach about 12.5%, to meet Subsequent processing requirements, but generally speaking, when the process temperature is higher than 100°C, the aroma of dried leaves will be significantly reduced, and the amount of aroma will also be significantly reduced; the second is air drying and drum drying, which cannot be solved at the same time. Reducing the contradiction between moisture content, temperature fluctuation and improving the filling capacity of shredded leaves. For example, air drying adopts a process above 130 ° C. Although the filling capacity of shredded leaves can be significantly improved, the fluctuation of moisture content and temperature of shredded shreds after treatment is relatively small. Large, poor uniformity; drum drying is mainly through the cylinder wall temperature above 140 ℃ to dry, although it can reduce the outlet moisture content and temperature fluctuations, but can not achieve better filling capacity; third, the drying end is not easy to control, because The process temperature is high, the processing time is short (usually 10~20 minutes), and the control of the drying end point is difficult to control, and there will often be over-drying or insufficient drying, which will affect subsequent production

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