Method for continuous microwave expansion of cut tobacco

Abstract

A method for continuous microwave expansion of cut tobacco comprises the following steps: impregnating the cut tobacco in an expanding agent; recycling the expanding agent in an impregnating device after impregnation; carrying out microwave expansion on the impregnated cut tobacco by a microwave dryer to obtain the expanded cut tobacco. The expanded cut tobacco comprises one or more than two components of ethanol with 4-12 carbon atoms, ketone with 4-12 carbon atoms, halogenether with 2-12 carbon atoms, alkane with 3-12 carbon atoms or alkane with 3-12 carbon atoms substituted by 2 halogen atoms. The filling value of the expanded cut tobacco reaches above 7.5, the cutting ratio is above 90%, the moisture content after expansion is 12-13%, the expansion of the cut tobacco is even without water damaged cut tobacco; the whole set of devices has low energy consumption and high automation, and continuous closed mass production can be carried out.

Description

Technical field [0001] The invention relates to an expansion process in the tobacco industry, in particular to a cut tobacco expansion process in which an organic medium is used as the expansion medium, and more specifically to a circulation process in which a low boiling point organic medium is used as the expansion medium. Background technique [0002] Tobacco expansion technology is a new technology that developed rapidly in the late 1960s and early 1970s. After being expanded, the shredded tobacco can significantly increase the filling capacity, thereby reducing the consumption of tobacco leaves in a single box of the cigarette and reducing the nicotine content in the cigarette. Incorporating expanded shredded tobacco in cigarettes can enhance its combustion performance and thereby reduce the tar content in the cigarettes. It is estimated that adding 10% of expanded shredded tobacco to cigarettes can save 7-8% of shredded tobacco, and the tar content of each cigarette can be...

AI Technical Summary

Problems solved by technology

[0008] The shredded tobacco expansion process mainly adopts hot steam, vulcanized bed and other methods to expand shredded tobacco. For example, patent application CN200510010637 uses water as the medium to heat and humidify shredded tobacco. Dehumidification promotes the expansion of shredded tobacco, and the obtained expanded shredded tobacco has poor filling performance and high energy consumption.

Microwave technology is mainly used in tobacco drying in domestic and foreign tobacco industries. It is mainly used in industries such as loose cigarette packs in China. Patent application 200710025714.8 discloses a process for microwave puffed tobacco stems. After dipping tobacco stems in an aqueous solution, flatten them Lay it in glassware, and then place the glassware in the microwave to puff up. The whole process is intermittent, and there is no continuous production

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