Periodic variable-temperature baking method for promoting tobacco leaf yellowing in yellowing period

Abstract

The invention discloses a yellowing period periodic variable-temperature baking method for promoting tobacco leaf yellowing, which comprises the following steps of: in a tobacco leaf yellowing period, controlling a heating device of a bulk curing barn through a tobacco leaf baking controller of the bulk curing barn, so that the dry-bulb temperature of a tobacco loading chamber of the bulk curing barn takes the tobacco leaf yellowing temperature x DEG C as a base point temperature, takes n DEG C as a variable-temperature amplitude and takes y hours as a variable-temperature frequency; and performing periodic sine curve change, and baking the tobacco leaves in the tobacco loading chamber by a baking method of periodic temperature change. A staged constant-temperature baking method of an existing bulk curing barn in the yellowing period is changed, day and night temperature difference changes during natural growth of tobacco leaves are simulated, and a periodic variable-temperature baking method is adopted in the tobacco leaf yellowing period to promote intracellular enzyme activity and cell metabolism in the tobacco leaves and accelerate tobacco leaf yellowing, so that the content of total sugar and reducing sugar in the tobacco leaves can be effectively increased; meanwhile, the nicotine content can be reduced, the quality of the cured tobacco leaves is improved, the curing cost of a bulk curing barn is reduced, and the economic benefits of the cured tobacco leaves are improved.

Description

Technical field [0001] The present invention relates to the technical field of tobacco leaf baking equipment, specifically to a tobacco leaf baking to promote the yellowing period of the tobacco leaf yellowing period periodic temperature baking method. Background [0002] Tobacco leaves mature, harvested after the need to be baked to fix and highlight the inherent quality of tobacco leaves, at present, the roasting of tobacco leaves is mainly carried out in the dense roasting room. At present, when roasting tobacco leaves, a three-stage baking method is usually used, and the three stages are usually called the yellowing stage, the color setting stage and the dry tendon stage. For the yellowing stage of tobacco leaf baking, the current baking temperature control method is usually used to maintain a constant temperature in stages, that is, the dry bulb temperature in the tobacco room is heated up to the yellowing temperature, and then the temperature is stable, so that the dry bulb...

AI Technical Summary

Problems solved by technology

For the yellowing stage of tobacco leaf curing, the currently commonly used method of curing temperature control is staged constant temperature, that is, first raise the temperature of the dry bulb in the tobacco chamber to the yellowing temperature, and then stabilize the temperature so that the temperature of the dry bulb in the tobacco chamber Keep the yellowing temperature for a certain period of time. During the stable temperature period, the tobacco loading room is under constant temperature conditions. However, the tobacco leaf is an individual that develops under variable temperature conditions. The growth of tobacco leaves in the field is affected by the temperature difference between day and night. In autumn, the temperature difference between day and night is larger in autumn. The existence of the temperature difference between day and night in the field of tobacco leaves is conducive to activating the activities of various enzymes in the leaves and promoting the yellowing of tobacco leaves. Roasting methods are not conducive to activating the activities of various enzymes in tobacco leaves, which in turn affect the efficiency of tobacco leaf curing and the quality of tobacco leaves after curing

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