Method of increasing the level of volatiles in a pulverized coal mixture

US5687658A · kind A · utility

Assignee

• Babcock Lentjes Kraftwerkstechnik GmbH · DE

Inventors

• Michael Streffing · Beckum, DE
• Alfons Leisse · Essen, DE

Key dates

• Filing date: Jun 12, 1996
• Grant date: Nov 18, 1997
• Expiry date: Jun 12, 2016

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E20/34
• WIPO field: Thermal processes and apparatus
• WIPO sector: Mechanical engineering

Abstract

A method of burning coal with less than 10% volatiles in a burner supported by air. The coal is pulverized in a pulverizer and supplied to the burner mixed with a vehicle in the form of air. The object is more reliable ignition. The coal is separated from the air before it enters the burner and is combined into a new mixture with heated air. The second mixture is forwarded at a higher temperature and with a lower level of coal. The coal is separated from the second mixture and combined into a third mixture with heated air. The third mixture is forwarded at a higher temperature and with a higher level of coal.