Threshed and re-dried tobacco leaf preprocessing technique based on tobacco leaf raw material characteristics

Abstract

A threshed and re-dried tobacco leaf preprocessing technique based on tobacco leaf raw material characteristics comprises the process steps of vacuum dampening, primary hot-air leaf wetting and secondary hot-air leaf wetting and is characterized in that the adhesion and moisture of tobacco leaf raw materials are firstly analyzed and tested for classification before the process steps, and preprocessing process technique parameters of different categories of tobacco leaf raw materials are determined according to adhesion and moisture detection results of tobacco leaves. By adopting the technique, the moisture uniformity of different categories of tobacco leaf raw materials in a tobacco leaf threshing and re-drying preprocessing process is improved, caking phenomena of high-adhesion and high-moisture-content threshed and re-dried tobacco leaf raw materials in the threshing and re-drying preprocessing process are decreased, the breaking degrees of different categories of tobacco leaf raw materials in the threshing process are reduced, and the economic efficiency of threshing and re-drying processing is improved on the basis that the processing quality of threshing and re-drying is ensured.

Description

technical field [0001] The invention belongs to the technical field of threshing and redrying technology, and specifically relates to a pretreatment process for threshing and redrying tobacco leaves based on the characteristics of tobacco raw materials, mainly involving vacuum rehydration, primary hot air moistening, secondary hot air moistening, etc. pretreatment technology. Background technique [0002] Threshing and redrying is a continuous manufacturing process of tobacco leaves from the input of tobacco leaf raw materials to the output of finished tobacco sheets. In the whole process, the pretreatment of threshing and redrying improves the moisture content and uniformity of tobacco leaf raw materials by heating and humidifying, and adjusts its mechanical strength such as shear force and pulling force to an appropriate range to ensure the processing quality of threshing and redrying. And in the process of separating the stems, it can reduce the crushing of the tobacco l...

AI Technical Summary

Problems solved by technology

In order to reduce the influence of heating and humidification on the pretreatment of leaf threshing and redrying and leaf redrying at high temperature and drying on the aroma of tobacco raw materials, the current threshing and redrying plus more abandon the vacuum rehydration process, and reduce the secondary hot air to moisten the leaves. Low-moisture threshing process technology (patent number: ZL201110362709.2) was implemented for the moisture content of raw materials, and in the actual processing and production, problems such as a decrease in the uniformity of the leaf structure of some tobacco leaves and an increase in the loss of threshing and redrying were brought about: (1) sticky After the tobacco leaves with low adhesion and low moisture content are processed by hot air moistening once and twice, the moisture content uniformity of tobacco leaves is poor, and the tobacco leaves are broken; (2) The adhesion is high and the moisture content is high The phenomenon of cake formation in the tobacco bale is relatively serious. After the first hot air moistening and the second hot air moistening, the tobacco leaf cake still exists, and the moisture content of the tobacco leaves is poor. The processing quality cannot be guaranteed

However, this method mainly relies on the technological transformation of the existing threshing and redrying pretreatment section, and increases the storage time of tobacco leaf raw materials in actual production, reduces production efficiency, and increases the operating cost of the enterprise.

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