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 an expansion process of shredded tobacco with an organic medium as the expansion medium, and more particularly to a circulation process for the expansion of shredded tobacco with an organic medium with a low boiling point as the expansion medium. Background technique [0002] Shredded tobacco expansion technology is a new technology developed rapidly in the late 1960s and early 1970s. After the cut tobacco is expanded, the filling capacity can be significantly improved, thereby reducing the consumption of tobacco leaves in a single box of cigarettes and reducing the nicotine content in cigarettes. Adding expanded shredded tobacco to cigarettes can enhance its combustion performance, thereby reducing the tar content in cigarettes. It is estimated that adding 10% expanded shredded tobacco in cigarettes can save 7-8% shredded tobacco, and the tar content of each cigar...

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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