Fluidized bed having modified surfaces in the heat extractor

US4715809A · kind A · utility

Assignee

• Ruhrkohle AG

Inventors

• Josef Langhoff · Dinslaken, DE
• Hermann Krischke · Essen, DE
• Horst Geldmacher · Essen, DE
• Manfred Golomb · Bottrop, DE
• Karl-Heinz Kamp · Duisburg, DE
• Peter Masuch · Recklinghausen, DE
• Rolf Chalupnik · Essen, DE

Key dates

• Filing date: Dec 20, 1985
• Grant date: Dec 29, 1987
• Expiry date: Dec 20, 2005

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F22B37/106
• WIPO field: Thermal processes and apparatus
• WIPO sector: Mechanical engineering

Abstract

Heat exchanger tubes which are immersed in a fluidized bed of a combustion fluidized bed installation are provided with flow deflectors which reduce erosion of the fluidized materials in the bed on the tubes. The flow deflectors are preferably fins or pins, which protrude from the surface of the tubes and which disturb the erosive flow against the outer walls of the tubes. The flow deflectors also increase the surface areas of the tubes and thereby improve heat transfer from the combustion in the fluidized bed to a fluid heat exchanging medium within the tubes.