Curing process of flue-curing barn

Abstract

The invention discloses a curing process of a flue-curing barn, and belongs to the technical field of a tobacco curing. The process comprises the following steps: an ignition and temperature control stage: heating and roasting by utilizing an air source heat pump unit independently; tobacco leaf yellowing stage: heating and roasting by utilizing the air source heat pump unit independently; tobacco leaf color fixing stage: heating by utilizing the air source heat pump unit independently when a dry-bulb temperature is between 44 and 50 DEG C, and heating by using a coal burning boiler independently when the dry-bulb temperature rises to over 50 DEG C; and a tobacco leaf stem drying stage: heating by using the coal burning boiler independently. The curing process has the advantages of safetyand insurance, strong operability, stability of tobacco leaf color fixation, good leaf shrinkage, great improvement of flavor quantity of tar and tobacco leaves, is simple to operate; and the technical scheme of the roasting process has strong operability, so that the tobacco leaf curing quality and superior leaf ratio can be remarkably improved, the tobacco leaf dry matter consumption is reduced, and the roasting effects of saving energy, reducing emission, increasing quality and improving efficiency can be achieved.

Description

technical field [0001] The invention relates to a baking process of a barn, in particular to a process of using a mixed energy barn for baking. Background technique [0002] In recent years, due to the advantages of simple operation, energy saving and consumption reduction, and better quality of cured tobacco leaves, intensive curing barns have been rapidly popularized and applied nationwide, which is a major change in the history of tobacco leaf curing in my country. The baking principle of the dense barn is basically the same as that of the ordinary barn, but because the tobacco leaves are densely packed together, mechanical forced ventilation is adopted, and hot air is used for heating. According to the law, its baking technology is preliminarily summarized as "high temperature fully turns yellow and slow roasting, temperature control'two dragging'slowly fixes color, rapid fire kills gluten", that is, "one high, two slow and one fast" baking technology. The characteristi...

AI Technical Summary

Problems solved by technology

At present, there are the following problems in the process: First, the subjective randomness of the baking operation is large, and phenomena such as green smoke, variegated smoke, smooth smoke, color lightening, and oil content reduction occur from time to time.

Even at the same "control point", the wet bulb temperature, ventilation control, etc. are also very different, resulting in quality loss of tobacco leaves

Second, the degradation mechanism of tobacco leaf macromolecules such as starch and pigments under intensive curing conditions, and the physiological mechanism of tobacco leaf quality formation are still unclear

Cannot effectively regulate the degradation and transformation of the substances contained in tobacco leaves

The third is that the relationship between the amount of smoke installed and the wind speed and wind pressure in the blade gap is not yet clear

Fourth, insufficient attention is paid to the control of wet bulb temperature and ventilation

Fifth, the matching between the baking process and the automatic control equipment is poor, and the advantages and potential of advanced equipment cannot be fully utilized, and the level of automatic control is low

However, at present, there is no specific baking process for this kind of barn. With the traditional three-stage baking process, the proportion of upper-medium tobacco after roasting is only about 64.8%, and the proportion of variegated tobacco in the middle and upper leaves is large. It is more than 6.38%, which is not conducive to giving full play to the advantages of the new barn

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