High-moisture tobacco material drying method and drying tower

Abstract

The invention provides a tobacco material drying method and drying tower capable of realizing drying of high-moisture tobacco materials and high utilization rate. The drying tower comprises a material-feeding steam lock, a material-absorbing venturi tube, an inner drying drum and an outer drying drum, wherein the material-absorbing venturi tube is vertical to the ground; the inner drying drum and the outer drying drum are coaxial; tobacco materials are sucked into the inner drying pipe by the negative pressure generated by dry air flow in passing through the venturi tube; the diameters of an upper section and a lower section of the inner drying pipe are approximately equal in the height direction, and the diameter of the upper section is larger than that of the lower section; and correspondingly, the diameter of the upper section of the outer drying drum is larger than that of the lower section of the outer drying drum, therefore, the drying air speed becomes fast from slow in the inner drying drum, and becomes slow from fast when the tobacco materials reach the top end and are sprayed to the outer drying drum, so that the heat exchange time of the dried tobacco materials is longer, the drying is more sufficient and further the requirement for drying the high-moisture tobacco materials is met. The drying method and drying tower provided by the invention have the characteristics of energy conservation, low drying temperature, high drying efficiency and difficult crushing of the tobacco materials and the like, and can meet the process requirements of treatment intensity and drying uniformity and the like of the high-moisture tobacco materials.

Description

Technical field: [0001] The invention relates to shredded tobacco drying equipment on a tobacco shredded production line, in particular to a drying tower for drying high-moisture tobacco materials by using humid hot air. Background technique: [0002] Tobacco material drying is an important process in the tobacco shred production process. The goal of the tobacco material drying process is to remove part of the moisture in the tobacco material to meet the specified moisture requirements and accuracy, and at the same time increase the filling value of the tobacco material, reduce the irritation and woody gas of the tobacco material, and improve the absorption of the tobacco material. taste. The drying process generally uses heat conduction and heat convection to heat the moist tobacco material, so that the moisture in the moist tobacco material is evaporated and discharged. [0003] At present, tobacco drying machines commonly used by tobacco processing enterprises at home a...

AI Technical Summary

Problems solved by technology

For this reason, there is no need to configure separate heating and humidifying equipment, but the problem of crushing during the drying process has not been fundamentally solved, and effective drying of high-moisture tobacco materials with a moisture content of 45% cannot be carried out effectively

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