Method and device for the operation of a hot gas generator within a dryer

US4280283A · kind A · utility

Assignee

• Klockner-Humboldt-Deutz AG · DE

Inventors

• Jakob Ansen · Cologne, DE
• Helmut Duill · Cologne, DE
• Heinz Fasbender · Krefeld, DE

Key dates

• Filing date: Dec 3, 1979
• Grant date: Jul 28, 1981
• Expiry date: Dec 3, 1999

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F26B23/02
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A dryer system, such as is used in a pulverizing mill assembly, includes a hot gas generator which supplies drying gas to the starting point for a gas circulation system. The drying gas passes through the circulation system commingling with particles to be dried. The dried particles are removed whereupon the system gas flow is divided into a return portion and a spent portion for expulsion to ambient. Part of the system return flow is further freed of particles, compressed, and supplied to the hot gas generator as secondary gas. The return gas flow into the generator is regulated to control hot gas temperature in response to generator flow temperature. In addition, hot gas temperature may be controlled in response to system gas temperature by regulation of fresh primary air flow to the generator. Exhaust gases from the hot gas generator are introduced into the system return flow at the circulation starting point to repeat the process.