Processing process for threshing, re-drying and classifying tobacco stems

Abstract

The invention discloses a processing process for threshing, re-drying and classifying tobacco stems, which comprises the following steps: firstly performing leaf-stem separation; preliminarily screening stem turning heads and broken stems; then screening the tobacco stems into the three types of tobacco stems with different thicknesses of 1.5-2.0 mm, 2.0-2.5 mm and 2.5-3.0 mm; pre-pressing the three types of tobacco stems, wherein gaps among the pressed stems are 0 .8 mm, 1.0 mm and 1.2 mm respectively; mixing the three types of pre-pressed tobacco stems and re-drying; finally packaging and storing. According to the processing process disclosed by the invention, the tobacco stem re-drying efficiency can be improved, the consistence of the batch water loss rate and the moisture content after re-drying is improved, and the tobacco stem aging progress is accelerated; the tissue destruction difference degree of the tobacco stems with different thicknesses in the cut stem making process is reduced, the stem storage time is shortened, the production efficiency of the cut stem making procedure is improved, the cut stem moisture content fluctuation, the rejection rate and the energy consumption are reduced, and the uniformity of cut stems, the moisture content and the stability of filling values are improved.

Description

technical field [0001] The invention belongs to the technical field of tobacco processing, and in particular relates to a sorting and processing technology for threshing and redrying tobacco stems. Background technique [0002] Tobacco stem is an integral part of tobacco leaves. It is strip-shaped and compact in structure. Its main component is cell wall substance (about 40%), including cellulose, hemicellulose, lignin and pectin. Tobacco stems vary in thickness, ranging from 1.5mm to 3.0mm in diameter. The lower stem is thinner, the middle stem is in the middle, and the upper stem is thicker. In the same tobacco leaf, the stem near the petiole is thicker and the stem near the leaf tip is thinner. [0003] Currently, if figure 1 As shown, the tobacco stem processing technology used in the existing threshing and redrying factories is as follows: firstly, the tobacco leaves are separated from the leaf stems by threshing, and then the broken stems and stems with turned heads a...

AI Technical Summary

Problems solved by technology

These studies have improved the efficiency and quality of shredded stems to a certain extent, but they still mixed and pressed tobacco stems of different thicknesses, which could not solve the problems of different degrees of tissue damage, inconsistent water loss rates, and repeated pressing of tobacco stems in the same batch. The problem of uneven moisture content after roasting, they also did not take into account the influence of the difference in the thickness of the tobacco stems on the quality of the pressed stems, did not consider that the tobacco stems appear in the form of formula stems in actual use, and did not carry out the thickness of the tobacco stems. Categorical processing without taking into account the impact of stem compression strength on stem quality

Chinese patent 201510423519.5 is a refined grouping processing method for tobacco stems. In the process of making cut stems, the mixed stems are divided into stems below 1.5mm and stems above 1.5mm for group processing, and then they are processed into finished cut stems and then mixed and blended together. The method not only did not improve the efficiency of making cut stems, but on the contrary doubled the difficulty of making cut stems, making it difficult to popularize and use; and this method only considered the reuse of broken stems (below 1.5mm) and did not take into account conventional stems ( 1.5 ~ 3.0mm), the conventional tobacco stems were not classified and processed, and the aging progress of the tobacco stems was not considered.

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