Method for natural fermentation curing at yellowing stage

Abstract

The invention discloses a method for natural fermentation curing at a yellowing stage. The method includes the steps that 1, after tobacco leaves are loaded and fired, dry-bulb temperature and wet-bulb temperature are controlled to be 34 DEG C and kept for 4-5 hours; 2, after the dry-bulb temperature and the wet-bulb temperature are raised to 37 DEG C, a circulating fan and a cold air valve are turned off for 10 hours, and the fire of a stove is banked; 3, when the dry-bulb temperature and the wet-bulb temperature are raised to 39 DEG C, the circulating fan is operated for 20 minutes every 3 hours until the tobacco leaves are yellowed and ribs of the tobacco leaves are blued; 4, the dry-bulb temperature is raised to 43 DEG C, the wet-bulb temperature is controlled to be 36 DEG C-37 DEG C for dehumidification, after the tobacco leaves are slightly rolled, the dry-bulb temperature is raised to 46 DEG C, the wet-bulb temperature is controlled to be 36 DEG C-37 DEG C, and after the tobacco leaves are largely rolled, the dry-bulb temperature is raised to 52 DEG C, the wet-bulb temperature is controlled to be 37 DEG C-38 DEG C, and the temperature is kept for 10-15 hours; 5, the tobacco leaves enter a normal rib drying stage to be cured until the ribs of the tobacco leaves are fully dried. Compared with the prior art, ash hung on the tobacco leaves on the upper portion can be effectively reduced, the curing quality of the tobacco leaves can be improved, the curing cost can be further lowered, and good economic benefits are achieved.

Description

technical field [0001] The invention relates to a method for naturally fermenting and baking during the yellowing period, and belongs to the technical field of tobacco leaf baking technology. Background technique [0002] The so-called hanging gray tobacco leaves refer to gray or dark brown spots of different sizes with indistinct boundaries appearing on the surface of the tobacco leaves after roasting. The reason for this is that the water in the middle and late stages of color fixation cannot be discharged in time, and the moisture content of the tobacco leaves is still high under high temperature, resulting in the occurrence of "browning reaction". It is characterized by gray and dark brown spots on the appearance, poor internal quality of aroma, less aroma, strong irritation, weak combustion, etc., poor compatibility in cigarette formula, heavy dry coke gas, etc. [0003] In recent years, the ash on the upper part of the tobacco leaves in Longli County, Guizhou Province...

AI Technical Summary

Problems solved by technology

It is characterized by gray and dark brown spots on the appearance, poor aroma in internal quality, less aroma, strong irritation, weak combustion, etc., poor compatibility in cigarette formula, heavy dry coke gas, etc.

[0003] In recent years, the ash on the upper part of the tobacco leaves in Longli County, Guizhou Province has been increasing year by year, and the proportion of ash on the tobacco leaves is about 20%. The method cannot meet the quality requirements of tobacco leaf curing

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