Bulk curing barn leaf scrap insertion tobacco filling continuous heating roasted fragrant and roasted soft roasting method

Abstract

The invention discloses a bulk curing barn leaf scrap insertion tobacco filling continuous heating roasted fragrant and roasted soft roasting method. The method includes following steps: (1), adopting a leaf scrap insertion specified mode for tobacco filling; (2), inspecting a bulk curing barn with a curing barn controller, adopting a lower air dividing partition for control on the controller in the airflow-up bulk curing barn, going through a yellowing period, a color fixing period and a stem drying period, wetting back, and unloading the tobacco, wherein the bulk curing barn is an airflow-up bulk curing barn for roasting. By the method, fragrance ingredient content of tobacco can be averagely increased by 9.3% while roasting quality of all-kang tobacco, smooth cigarette amount can be averagely reduced by 28.7%, and first-glass cigarette proportion can be averagely increased by 12.1. The roasting method is terse and concise, convenient for roasting personnel to master, set and modify and capable of increasing income of tobacco growers.

Description

technical field [0001] The invention relates to a method for continuously raising the temperature of loose-leaf sticks loaded with tobacco in a dense curing room, and belongs to the technical field of tobacco leaf curing. Background technique [0002] Tobacco leaf curing is inseparable from the baking process. The curing process is the specific requirements and control technology for variables such as dry bulb temperature, wet bulb humidity, and curing time during the tobacco leaf curing process. At present, the tobacco leaf curing process applied in the way of plugging tobacco in dense curing rooms, such as three-stage curing process and six-step curing method, all adopt a stepped heating method, that is, there are multiple heating stages and stable temperature stages. Generally, The heating period is shorter, and the temperature stabilization period is longer. There are following problems in the practice of tobacco leaf curing in these stepwise heating and curing process...

AI Technical Summary

Problems solved by technology

[0005] (2) The duration of the temperature stabilization stage is too long, generally at 34°C for 10 hours or more, at 38°C for 18 hours or more, at 54°C for 12 hours or more, etc. quality

Therefore, the temperature and humidity displayed by the controller can only represent the baking process conditions of the tobacco leaves in the shed where the main control sensor is placed. The process is suitable, and often the curing process of tobacco leaves in other sheds is not suitable or not suitable, generally because the temperature is low and the relative humidity is high

If the duration of the temperature stabilization period is too long, it is actually not conducive to the quality modulation of tobacco leaves in other sheds. For example, if the temperature stabilization time is too long at 34°C and 38°C, the temperature of tobacco leaves in other sheds is lower, and the activity of enzymes such as hydrolytic enzymes will be reduced. The degradation rate of internal macromolecular substances such as starch, protein, chlorophyll, etc. is relatively slow, which is not conducive to their full or proper degradation. Beyond the temperature and humidity range suitable for the degradation and conversion of macromolecular substances, due to the higher temperature and lower humidity, more free water in the tobacco leaves will be vaporized and discharged, resulting in lower moisture content in the tobacco leaves, and the activity of hydrolytic enzymes will be inhibited, and there will be no It is conducive to the full or proper degradation and transformation of macromolecular substances, and the amount of small molecular substances such as amino acids, monosaccharides and other aroma-generating substances and aroma precursors produced is insufficient, resulting in insufficient aroma of some tobacco leaves after roasting, and the structure is stiff and not loose. , not soft

In addition, although a longer temperature stabilization at 54 °C is beneficial to the production of more aromatizing substances in the tobacco leaves in the shed where the main control sensor is located, but the tobacco leaves in other sheds have lower temperatures and produce less aromatizing substances. Fast, soon passed the temperature stage suitable for the formation of aroma substances

It can be seen that the duration of the stable temperature stage is too long, which is not conducive to the quality modulation of tobacco leaves in other sheds, that is, it cannot ensure that the tobacco leaves on the kang are fragrant, soft and cooked.

[0006] (3) The dry-wet difference in the yellowing stage, especially the early yellowing stage and the mid-yellowing stage, is relatively large. When the dry bulb temperature is 38°C, the wet bulb temperature is about 36°C, and when the dry bulb temperature is 40°C, the wet bulb temperature is At around 37°C, the tobacco leaves will lose more free water, which will affect the activity of hydrolytic enzymes and other enzymes, which is not conducive to the degradation and transformation of macromolecular substances, and is not conducive to the full yellowing of tobacco leaves, which is not conducive to the roasting of tobacco leaves.

[0007] (4) These stepped heating and baking processes cannot meet the needs of all tobacco loading methods for roasting fragrant and soft-cured tobacco leaves

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