The aim of a project supported by the Minister of Science and Technology is the development of a process for gas cleaning at temperatures above 1573 K. The simultaneous removal of particles and alkalis should be possible with this process. This hot gas cleaning ought to be integrated into an advanced combined cycle based on a pressurized slag tap furnace. The research concerning the development of a venturi scrubber with molten slag have ben done at the Institute of Ferrous Metallurgy of the Technical Univerisity of Aachen. Studies concerning the chemical and physical properties of slags such as viscosity or surface tension on the atomization of liquids. Furthermore, studies are necessary concerning the precipitation efficiency of a venturi scrubber with a liquid which has the same physical properties as slag. This paper presents thermochemical calculations with regard to the absorption of gaseous alkalis by molten slag. Furthermore, it contains the investigations concerning the influence of alkali oxides on the viscosity of molten slag.
Hot gas cleaning for combined cycle based on pressurized coal combustion
Gasreinigung bei auf Hochdruckverbrennung von Kohle basierenden Kombinationskraftwerken
1994
8 Seiten, 13 Bilder, 7 Tabellen, 14 Quellen
Conference paper
English