Biomasse Kraft-Wärme-Kopplung mit Wirbelschichtvergasung

In the year 2002 a demonstration plant for combined heat and power production (CHP) from biomass started operation in Gussing (AT), a small city with about 4,000 inhabitants. During the last decade Gussing has changed the energy supply totally to renewable sources. The last plant on this successful way was 8 MW fuel CHP plant based on a steam blown gasifier, a gas cleaning section and production of heat and power (4,5 MW thermal, 2 MW electric) with a gas engine which is able to produce all the electricity consumed in Gussing. A steam blown fluidised bed gasifier was used which produces a nitrogen free gas with a high calorific value (12 MJ/m 3 N) and only a low amount of tar. A two stage gas cleaning and cooling system make sure that the gas engine gets a cool and clean gas. Until the end of June 2003 about 5,800 hours of operation with the gasifier and 3,600 hours with the gas engine could be reached. The plant shows a very constant and stable operation and fulfil all the requirement from the authorities. No waste water is produced and also the ash show no problems because the ash comes out from a combustor which delivers the heat for the gasification reactions. About 6,000 hours per year are necessary to get a economic operation of the plant.