Method of changing the volume of cut tobacco stems and device for carrying out this method

摘要

The invention relates to a method to increase the volume of shredded tobacco stems by impregnating with an at least water-containing impregnating agent to a water content of at least 45 wt .-%, heating the impregnated tobacco stem parts with a gaseous, steam-containing heating and transport medium at a temperature of about 105 to about 250 ° C, wherein the tobacco stem parts being transported through an expansion zone and a drying zone by means of a pneumatic transport system. In this process, the impregnated tobacco stem parts are held at least about 10 seconds in the expansion and drying zone and dried to a final moisture content of at least 12.5 wt .-%. Furthermore, the invention relates to a device for performing this method.