Combustion tests in the VERENA fluidized bed test plant

Thermal behaviour of refused-derived fuel in a stationary fluidized bed combustion

Funding:
Trial 1:  Pöyry GKW GmbH, Germany,
Trial 2:  Wiederkehr Recycling AG, Switzerland

Duration:  April 2008 and July 2008

Project description:

For two operators of waste treatment or recycling plants (Pöyry GKW GmbH, Wiederkehr Recycling AG) the question arose whether the produced substitute fuels from sewage sludge, shredder light fraction, paper catch materials and a high calorific fraction from residual waste or from a shredder light fraction can be burned in a fluidized bed incineration plant and which characteristics the resulting ashes (bed ash, cyclone ash, fabric filter ash) show.

The Institute for Waste Management and Contaminated Site Treatment (former name, today "Waste Management and Circular Economy") of the Technical University of Dresden has a stationary fluidized bed test facility with which the incineration of the aforementioned secondary fuels can be investigated on a semi-industrial scale.

The combustion of the test materials without the addition of auxiliary fuels and the determination of the required, as well as the largest possible test material throughputs with low excess air while complying with the emission limits for the flue gases were investigated here.

All data determining the combustion were to be measured and recorded:
- the material flows fed to the kiln, the ash quantities produced,
- the temperatures and pressures in the kiln, and the flue gas constituents specified in the waste incineration regulations.