METHOD FOR THE IMPROVEMENT OF THE SLAG QUALITY IN GRATE FURNACES

摘要

A method for the improvement of the slag quality of grate furnaces, comprising a combustion bed with several consecutive fixed-bed burn-out zones on one combustion grate underneath a combustion chamber. The problem addressed by the invention is to provide a simple and reliably controllable method for improving the slag quality during waste combustion, such as grate combustion, where a good slag quality is already being obtained during the fixed-bed combustion process on the grate. The problem is solved by the fact that the first fixed-bed burn-out zones are permeated by an oxygen-rich primary gas and that at least one of the fixed-bed burn-out zones following the first fixed-bed burn-out zone is permeated by hot fuel gas from the combustion chamber.