Investigations on the Combustion of Various Waste Fractions inside a Grate Furnace

The influence of various waste mixtures on the combustion process in a grate furnace was investigated at the test plant TAMARA. Measurements were carried out inside the combustion chamber by monitoring temperatures and sampling gaseous combustion products and heavy metals. The data were verified by element and energy bal­ ances. The different fuel fractions influence the combustion process by producing a faster carbon burnout when proc­ essing fuels having increased heating values. Above the fuel bed the concentration of products of incomplete . combustion like CO and total organic compounds increase with increasing heating values, too. The specification and the partitioning of the mayor C-H compounds inside the combustion chamber are not influenced significantly by the different fuels. The release of heavy metals from the fuel bed to the flue gas takes place only in the region of the highest tem­ peratures.