Tobacco material redrying equipment and method

Abstract

The invention provides redrying equipment and a redrying process method for realizing simple, high-efficiency and low-processing-intensity tobacco sheets or tobacco stems which are dried uniformly. The redrying equipment comprises a baking rotary drum which is arranged on a stander, and a hot air system, wherein a plurality of heat conduction oil heat exchange pipes which are equally arranged in parallel along the outer wall surface are arranged on the outer wall surface of the baking rotary drum; the heat conduction oil heat exchange pipes are communicated with a heat conduction oil cyclic heating system; a section from the feeding end of the baking rotary drum to the position of which the length is about 1 / 3 of the total length of the baking rotary drum is a preheating section, and the residual 2 / 3 section is a drying section; the feeding end of the baking rotary drum is higher than the discharging end of the baking rotary drum; and a shovelling plate and a material-receiving sliding plate are arranged in the drum. By using the equipment, tobacco materials can be directly redried only by heating and drying processes until the moisture content and the temperature of the tobacco materials meet the requirements of the next process; and furthermore, the process is simple, efficient, energy-saving and environmentally-friendly.

Description

technical field [0001] The present invention relates to a tobacco material redrying equipment in the technical field of tobacco threshing and redrying, and also relates to a tobacco material redrying method realized by using the redrying equipment. Background technique [0002] Such as figure 1 As shown, the existing tobacco rebaking process is to heat and dry the first-cured tobacco leaves, cool them, and then perform moisture resurgence treatment, control the moisture content of the tobacco leaves within a certain range, and promote the changes in the physical and chemical properties of the tobacco leaves in a direction that is conducive to processing, so as to improve the quality of the tobacco leaves , and is conducive to long-term storage and aging of tobacco leaves. [0003] According to different re-roasting objects, the existing re-roasting machines can be divided into blade re-roasting machines and tobacco stem re-roasting machines. Due to the different physical p...

AI Technical Summary

Problems solved by technology

[0006] To sum up, the current leaf redrying process and equipment have the following problems: first, the temperature in the redrying process is still high, resulting in a large loss of tobacco aroma; second, the redrying process is complicated, such as figure 1 As shown, in the process of rebaking the leaves, the leaves have to be dried in several drying areas, and the water content is reduced from 20% to 9% to 10%, and then cooled to 8% to 9% water and then regained to 12.5% ​​moisture; the third is that the moisture uniformity of the leaves after rebaking is poor, and the whole process of drying, cooling and re-moisture of the leaves is relatively static with a thickness of 80-100mm and spread on a mesh belt with a width of 3m to 4m. , resulting in poor uniformity of drying, cooling, and moisture regain; fourth, the rebaking equipment is bulky, and the maintenance and use costs are high, which is not conducive to energy conservation and environmental protection.

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