Method for expanding tobacco shred and equipment for the method

Abstract

The invention relates to a method for expanding tobacco shreds and equipment used in the method. The method is characterized by comprising the following steps: (1) dipping; (2) loosening; (3) storing; (4) secondary loosening; (5) quantitative feeding; (6) pre-expanding, purification and air extraction: the tobacco shreds dipped by an expanding medium are pre-expanded in air blowing equipment, and the tobacco shreds dipped by the expanding medium are delivered to the air blowing equipment which blows air to the shreds dipped by the expanding medium; and miscellaneous gas volatilizing at the pre-expansion of the tobacco shreds and CO2 are pumped off by an exhaust tube; (7) expanding: the pre-expanded tobacco shreds are quickly delivered to a sublimator by a feeding air lock and is mixed with hot air flow in the sublimator for continuous expansion; and (8) cooling and shaping. The method has the advantages of improving the toughness, the whole cut rate and long shred rate of the expanded tobacco shreds, reducing the breakage of the expanded tobacco shreds, eliminating the miscellaneous gas and lowering energy consumption in the production process.

Description

technical field [0001] The invention relates to the tobacco processing industry, in particular to a technology for processing shredded tobacco by using CO2 dry ice as an expansion medium in a hot gas flow expansion method. Background technique [0002] CO 2 Dry ice expansion technology is a mature technology for processing shredded tobacco by using expansion medium and hot air expansion method. However, with the continuous improvement and pickiness of people's requirements for smoking quality and taste, the application of CO2 dry ice expanded shredded tobacco in finished cigarettes has been challenged, especially the application in high-end cigarettes is more cautious. like image 3 As shown, according to the current processing technology, entering CO 2 CO before hot end sublimator 6 of dry ice expansion line or expansion tower 2 Dry ice shredded tobacco 1, due to the dry ice formed on the surface and inside of the shredded tobacco, the shredded tobacco becomes hard and b...

AI Technical Summary

Problems solved by technology

However, with the continuous improvement and pickiness of people's requirements for smoking quality and taste, the application of CO2 dry ice expanded shredded tobacco in finished cigarettes has been challenged, especially in the application of high-end cigarettes.

like image 3 As shown, according to the current processing technology, entering CO 2 CO before hot end sublimator 6 of dry ice expansion line or expansion tower 2 Dry ice shredded tobacco 1, due to the dry ice formed on the surface and inside of the shredded tobacco, the shredded tobacco becomes hard and brittle. After being beaten by the feeding electronic scale 2 and raked by the feed air lock 5 and rolled by the valve body and the rotating valve core The impact of the raking of the mill or discharge air lock 8 and the rapid expansion and transportation of the hot air in the sublimator 6 will inevitably cause a certain degree of crushing

And during the expansion process, the dry ice shredded tobacco volatilizes CO 2 The gas and the water vapor in the expansion tube and the chemical components in the tobacco produce reactants, which are used repeatedly in the entire hot-end expansion circulation pipeline, which not only increases the energy consumption of the heating system, but more importantly, with this gas The increase of reactants will affect the quality and taste of expanded cut tobacco

Due to the special equipment flow and processing technology, the expanded shredded tobacco is fragile and has poor processing resistance. In addition, the burnt smell and miscellaneous gas also affect the use of the expanded shredded tobacco. Therefore, the technology of CO2 dry ice expanded shredded tobacco needs to be further improved.

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