A method for improving the overall quality of leaves after redrying

Abstract

The invention relates to a method for improving comprehensive quality of leaves after being redried. Heating for loosening is performed before leaf redrying to increase temperature of leaves entering a redryer and enable the leaves to be fully loosened. Loosening and stretching of the leaves are conducive to improving uniformity in water content of the leaves after being redried and lowering shrinkage rate of the leaves during redrying; the leaves are heated before entering the redryer, so that drying temperature of a drying area of the redryer can be lowered, and low-temperature slow drying and tobacco leaf aroma retention are realized.

Description

technical field [0001] The invention relates to the tobacco industry, in particular to a method for improving the overall quality of leaves after rebaking. Background technique [0002] In the process of leaf threshing and redrying in the tobacco industry, leaf redrying is one of the important processes. This process mainly transports the leaves after threshing in the leaf storage cabinet to the leaf redrying machine through quantitative feeding and scraper feeding. , the leaves go through three stages of drying, cooling and moisture rejuvenation to reduce the moisture content of the leaves from about 18% to 12% to complete the rebaking of the leaves. [0003] People in the industry believe that in the process of threshing and redrying, in addition to ensuring the physical and chemical indicators such as moisture content and leaf structure of the finished tobacco, it is also necessary to maintain the characteristic style and aroma of the leaves as much as possible. [0004]...

AI Technical Summary

Problems solved by technology

The current re-baking machine generally adopts to increase the length of the drying zone, cooling zone and moisture resurgence zone in order to achieve low-temperature and slow-baking, but it also increases the energy consumption of the equipment

[0006] 2) In order to ensure the uniformity of the formula of the finished tobacco products, most enterprises set up leaf storage cabinets after threshing, which is conducive to the mixing of leaves after threshing and the uniform moisture content, but there are also phenomena of shrinkage and hardening of leaves after threshing. It has a great influence on the uniformity of leaf structure and moisture content after roasting

The shrunken and hardened leaves are not stretched and loosened by a warming and strong loosening device, which affects the structure and moisture content uniformity of the leaves after baking

[0009] like figure 2 As shown, the leaf re-curing drying curve generally adopted in the industry is the arc constant temperature method. Since the highest drying temperature is in the middle of the drying area and the leaf temperature is relatively high, this method is not conducive to the fragrance retention of tobacco leaves.

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