Combustion chamber for a fluidized-bed furnace

US4766851A · kind A · utility

Assignee

• Kraftwerk Union Aktiengesellschaft · DE

Inventors

• Werner Emsperger · Erlangen, DE
• Hermann Bruckner · Uttenreuth, DE
• Georg Losel · Uttenreuth, DE
• Rudolf Pieper · Erlangen, DE

Key dates

• Filing date: May 21, 1986
• Grant date: Aug 30, 1988
• Expiry date: May 21, 2006

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F23C2206/101
• WIPO field: Thermal processes and apparatus
• WIPO sector: Mechanical engineering

Abstract

A combustion chamber with a fluidized bed furnace having a nozzle plate, a fuel feed above the nozzle plate, a primary air feed below the nozzle plate, an exhaust gas channel at an upper end of the combustion chamber, and heat-exchanging heating surfaces includes a cylindrical combustion chamber wall disposed vertically upright and having, in an upper region thereof, a plurality of secondary air nozzles disposed tangentially as well as downwardly inclined to the cylindrical wall for separating and returning unspent solid particles into a lower region of the fluidized bed, a device for directing a flow of gas and particles vertically upwardly in a central region of the combustion chamber and spirally downwardly along the cylindrical wall, and a device for impressing an upwardly increasing rotary flow about an axis of symmetry of the combustion chamber upon the gas flow.