Process for the thermal disposal of high-calorific fractions from sorted waste and / or residues in fossil-fired power plants

摘要

The method involves preparing and treating refuse (2), which is then compacted to form pellets or briquettes or is subjected to thermal treatment or homogenisation to form a coke-like material (15) and high-energy gas (7). The refuse may also be mixed with additives in a controlled way according to required gas and coke analyses and required quantities of gas and coal. The refuse is directly fed into the coal stream in the discharging hopper, or a coal belt, or a steam generator hopper or a coal distributor in front of or in the area of a coal fall shaft or of a flue gas recirculation device. The refuse is fed from a maximum proportion of 5% of the quantity of coal in the coal distributor as from preferably 60% of the firing capacity of the boiler, is fed together to a coal mill and is burned in the steam generator. The high-energy gas (7) generated during the thermal treatment is partly or completely fed directly to the steam generator (14) and is burned while partly or completely disposing of a separate purification.