Process for cooling a hot process gas

US5205350A · kind A · utility

Assignee

• Metallgesellschaft AG · DE

Inventors

• Martin Hirsch · Friedrichsdorf, DE
• Wolfgang Frank
• Manfred Heil · Steffenberg, DE

Key dates

• Filing date: Jul 17, 1991
• Grant date: Apr 27, 1993
• Expiry date: Jul 17, 2011

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10K1/04
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Disclosed is a process for cooling hot exhaust gases. The process gases are supplied to a stationary fluidized bed, which contains cooling elements and is contained in an annular trough. Fluidizing gas is supplied to the stationary fluidized bed through the permeable bottom of the trough. The hot process gas is passed through the central opening in the fluidized bed. Cooled solids flow from the fluidized bed across the inner rim of the trough into the process gas stream and are entrained by said stream into the dust-containing space over the top surface of the fluidized bed. The solids which are separated in the dust-containing space fall back into the annular fluidized bed, and the cooled gas which contains the remaining solids is supplied to a gas cooler, which is provided with cooling surfaces. The gas which leaves the upper portion of the gas cooler is fed to a solids separator and the separated solids are recycled to the stationary fluidized bed.