Lime hydrating plant and process of lime hydrating as well as flue gas desulfurization plant with such a lime hydrating plant and process of flue gas desulfurization

US4917869A · kind A · utility

Inventor

• Rolf Graf · Königstein, DE

Key dates

• Filing date: Jun 30, 1988
• Grant date: Apr 17, 1990
• Expiry date: Jun 30, 2008

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2/08
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A lime hydrating plant is provided with an external cooler 16 in which the rawer solids portion which is recirculated into a return flow fluidizer 2 (hydrater) is cooled outside the hydrater. This means that less water has to be atomized into the return flow fluidizer 2 than by known plants in order to keep the adequate temperature essential for the hydrating process. Thus dew point decrease may be avoided and a highly reactive hydrated lime may be produced.