Method and device for direct drying and redrying of tobacco strips

Abstract

A method and a device for direct drying and redrying of tobacco strips are characterized in that the method includes the steps: using a feeder and an electronic belt weigher to convey threshed tobacco strips into a vibratory feed chute at constant flow; using the vibratory feed chute to convey the tobacco strips into a roller type tobacco strip redrying device; allowing the tobacco strips to sequentially pass through a variable-inclination and variable-plate-width shoveling plate drying area at the front of a roller and a spiked drying area at the rear of the roller; and allowing the tobacco strips to fully contact with direct hot air in the roller and the heated wall of the roller during shoveling and throwing in the shoveling plate drying area at the front, drying the tobacco strips by transfer-convection composite heat conducting, allowing the tobacco strips to continue contacting with highly humid hot air and the roller wall during rolling along the roller wall in the spiked drying area at the rear, and slowly dewatering the tobacco strips to be balanced, wherein the discharged tobacco strips is directly dried with the water content dropping to 12%-13%. The method and the device have the advantages that energy consumption is lowered, breakage of the tobacco leaves in drying is reduced, water uniformity of the redried tobacco leaves is improved, flavor ingredients of the cured tobacco are maintained effectively, and the process of redrying the tobacco strips is simplified greatly.

Description

technical field [0001] The invention relates to a method and a device for redrying tobacco slices, in particular to a method and a device for directly drying and redrying sliced ​​tobacco by adopting a low-temperature drum treatment method. Background technique [0002] Threshing and redrying is a necessary process for transforming tobacco leaves from agricultural products into raw materials for cigarette industry production after harvesting, and is a key link in the primary processing of tobacco leaves. In the leaf threshing and re-baking production line, the raw tobacco after the initial roasting is loosely moistened and screened, and then processed into finished tobacco sheets through the stem leaf separation and re-baking process, and then packed and exported. Tobacco re-baking is to bake the threshed and air-divided tobacco sheets in a re-baking machine to remove excess moisture in the leaves, so that the moisture content and temperature can meet the specified requireme...

AI Technical Summary

Problems solved by technology

However, this method also has the problems of long process flow and complex equipment. At the same time, the airflow drying method is difficult to meet the needs of large-flow material processing, and the airflow drying method also consumes high energy consumption.

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