Tobacco stalk expansion method

Abstract

The invention provides a tobacco stalk expansion method, which comprises the following steps of: grading tobacco stalks, performing impregnation remoistening on the graded tobacco stalks and expanding the tobacco stalks, wherein a microwave heating expansion method is adopted in the expansion of the tobacco stalks; preferably, the microwave heating expansion is performed on the tobacco stalks under a vacuum condition; more preferably, the microwave heating expansion is performed on the tobacco stalks by adopting more than two different kinds of continuous microwave output power under the vacuum condition, wherein the former two kinds of continuous microwave output power are 4.0 to 8.0 kw and 1.5 to 2.5 kw respectively for every kilogram of remoistened tobacco stalks; and the impregnation remoistening comprises the steps of: spraying water onto the tobacco stalks, and performing the impregnation remoistening under the pressure of 0.112 to 0.203 MPa and at the temperature of 50 to 100 DEG C. The expanded tobacco stalk has the characteristics of greater volume that is 1 to 3 times that of the conventional tobacco stalk, uniform expansion, remarkable fragrance, less wood smell, high resilience, the water content of 0.5 to 3 percent, high combustibility, improved intrinsic quality and relatively better smoke characteristic maintenance.

Description

technical field [0001] The invention relates to a method for expanding tobacco stems, in particular to a method for soaking tobacco stems by spraying water and expanding them with vacuum microwaves. Background technique [0002] Tobacco stems are an important part of tobacco leaves, and after separation of stem leaves, tobacco stems accounting for about 25% of the total weight of tobacco leaves can be obtained. Tobacco stems are tough and have the function of transporting nutrients and water during the cultivation and growth of tobacco. Therefore, the chemical components it contains are basically the same as those of leaves, but the effective content is not as good as that of leaves. The specific manifestations are that the cut stems made of tobacco stems have low filling value, insufficient aroma during burning and smoking, flat inhalation taste, low irritation and strength, and heavy miscellaneous gases, especially woody miscellaneous gases. However, if the tobacco stems ...

AI Technical Summary

Problems solved by technology

[0009] The above-mentioned tobacco stem expansion method requires too high temperature during the expansion process, and a large amount of oxygen contacts the tobacco stem during the expansion process, resulting in charred and carbonized tobacco stems. However, the same expansion effect cannot be achieved, which seriously affects the usability of the expanded tobacco stems.

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