Apparatus for the drying of tobacco materials

US4557057A · kind A · utility

Assignee

• B.A.T. Cigarettenfabriken GmbH · DE

Inventors

• Arno Weiss · Norderstedt, DE
• Horst Gaisser · Haßloch, DE

Key dates

• Filing date: Feb 7, 1984
• Grant date: Dec 10, 1985
• Expiry date: Feb 7, 2004

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F26B2200/22
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A stream dryer comprises in addition to the control bypass which bypasses the heat source a second ready-use bypass which is in parallel with the control bypass and bypasses the heat source. In the event of short-duration interruptions in working, the supply of steam is interrupted and the circulation of the hot gas is maintained substantially only through the ready-use bypass, so that the temperature of the circulated hot gas substantially does not change when the relatively small heat losses due to surface and exhaust gas losses are compensated. Temperature regulation is effected through the agency of the control bypass in this state of readiness also.