Online expanding and drying device of cut tobacco

Abstract

The invention discloses an online expanding and drying device of cut tobacco, wherein the upper part of a drying tower is communicated with a tangential separator through a material delivery pipe, the cut tobacco enters a discharge airlock and then is discharged therefrom after being separated from superheated steam, the superheated steam is recycled and communicated with a heating furnace through a pipe and a fan, and the heating furnace is communicated with the bottom of the drying tower through a superheated steam pipe; a feed airlock is communicated with an inlet formed in the lower part of the drying tower through a flat venturi, a heating unit is arranged at the front end of the feed airlock, the superheated steam pipe is communicated with the heating unit through an injection pipe, and an injection fan is arranged on the injection pipe at the front end of the heating unit; a heat exchanger is arranged in the heating unit and connected with a temperature sensor arranged at the inlet of the flat venturi to form a control loop; a steam injection pipe is communicated to the heating unit, and a flow control valve arranged on the steam injection pipe is connected with an oxygen content detector located at the inlet of the flat venturi to form a control loop. Expansion and drying are controlled independently so that the filling property of the cut tobacco can be improved.

Description

Technical field: [0001] The invention relates to an online expansion and drying device for shredded tobacco. Background technique: [0002] Tobacco drying is a key process in the cigarette processing process. At present, drum-type shred drying machines and air-flow shred drying machines are widely used. With the advancement of cigarette tar reduction and harm reduction technology, how to improve the filling of tobacco materials as much as possible While maintaining the tobacco aroma loss during the drying process, the tobacco is key. [0003] In recent years, air-flow tobacco online expansion drying equipment has been widely used in the domestic tobacco industry. Typical tube-type air-flow drying equipment, such as HXD from Dickinson-LEGG and HDT from Hauni; and pipe-tower air-flow drying equipment, such as domestic The SH9 series air-flow tobacco dryer manufactured by Tobacco Machine Company, and the CTD tobacco air-flow drying equipment introduced from COMAS Company in th...

AI Technical Summary

Problems solved by technology

[0006] Patent No. ZL201120213313.7 is a drying and expanding device for shredded tobacco. It is announced that the drying pipe of the drying and expanding device for the tubular airflow dryer adopts a 90° elbow at the corner, and the feeding port adopts vertically entering the heating pipe, and the feeding is uneven. Tobacco is easy to agglomerate in the equipment, and a curved pipe connection is adopted, and a feeding inclined pipe is installed on the air inlet pipe

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