A method for step-by-step expansion of tobacco stems

Abstract

The invention provides a method for expanding tobacco stems grade by grade. The method comprises the steps of sieving and removing impurities, increasing the temperature of a roller (increasing the temperature for the first time), increasing the temperature and moistening again (increasing the temperature for the second time), carrying out saturated steam heat exchange (increasing the temperature for the third time), expanding by microwaves, cooling by air and removing impurities and the like. According to the tobacco stems expanded grade by grade through the microwaves, the carbonization of stem cores is greatly reduced, the expansion is uniform and the capability of absorbing material liquid is enhanced; the loss of natural cigarette flavor is less, and scorched and wood flavors are alleviated; the smoking quality of cigarettes is remarkably improved. According to the expanded tobacco stems prepared by the method provided by invention, the processing performance is more stable, and the processing performance of subsequent sliced stem and shredded stem products is remarkably improved; the physical form is more approximate to cut tobaccos; in a cutting process, a crushing phenomena are remarkably reduced.

Description

technical field [0001] The invention relates to a method for gradually expanding tobacco stems, belonging to the technical field of tobacco processing. Background technique [0002] Tobacco stem microwave expansion technology uses microwave as an energy source to vaporize the moisture inside the tobacco stem in a very short time, and uses the temperature change to rapidly expand the cells in the tobacco stem, and the volume of the expanded tobacco stem can reach the original 2 ~3 times or even higher. During the rapid expansion process, a certain chemical reaction occurs inside the tobacco stem. Through the test of smoking, the green and woody gas of the expanded tobacco stem is weakened, and it has a more obvious roasted aroma. However, due to the heterogeneity of the raw material moisture and the difference in physical form of the tobacco stem, the tobacco stem after microwave expansion has a heavy burnt smell, often accompanied by carbonization of the stem core; Terrier...

AI Technical Summary

Problems solved by technology

However, due to the heterogeneity of the raw material moisture and the difference in physical form of the tobacco stem, the tobacco stem after microwave expansion has a heavy burnt smell, often accompanied by carbonization of the stem core; Low stem utilization

[0003] In order to improve the quality and utilization rate of tobacco stem expansion, a variety of tobacco stem expansion application technologies have been developed in the industry, such as high-temperature and high-humidity expansion technology and superheated steam expansion technology. The treatment is relatively simple and the treatment cost is low, but the treatment strength is weak and the expansion rate Low, although the expansion rate of the tobacco stem is improved and the miscellaneous gas is reduced, the product is granular and the blending uniformity with the shredded leaves is poor

The physical form of recombined shredded stems is poor, and the production cost is high

None of the above technologies can fully meet the technical needs of the tobacco industry to increase the use value of tobacco stems, which limits the proportion and scope of raw materials used in cigarette products

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