Developements for the Removal of Slag Droplets from Flue Gas Streams following Slagging Combustion of Hard Coal
Publications of 1999 - Abstract
Developements for the Removal of Slag Droplets from Flue Gas Streams following Slagging Combustion of Hard Coal.
Dr. Kurt Hübner, Prof. Dr.-Ing. Klaus Görner
Lehrstuhl für Umweltverfahrenstechnik und Anlagentechnik, Universität Duisburg-Essen
Johannes Albrecht, Dr.; K. Vydra, Dr.
Lurgi Envirotherm GmbH, Frankfurt am Main
The nearly complete removal of slag droplets prior to the turbine is indispensable for establishing IGCC technology based on pulverised coal combustion at high pressures and temperatures. Cold flow modelling shows the collection efficiency of packed granular beds to be significantly lower than comparable Multiwir separators. The model data indicate that an adapted Multiwir separator can be capable to meet the limits set by turbine operation. Under high temperatures and pressures a Multiwir separator must be constructed from ceramic materials. In spite of the adverse shape caused by material constraints the performance under cold flow conditions is superior to a packed bed of a realistic bed particle size range (20-30mm). Further research is required to shape and operating conditions and to set dimensions for a plant of industrial size.