Analýza metod denitrifikace spalin ve vztahu k životnímu prostředí

Abstract

Modern industrialized society faces two contradictory demands – high level of comfort and clean environment. For maintaining or raising living conditions society needs safe and in best case scenario cheap energy sources. Without them industrial, commercial nor household sector cannost prosper. Combustion as a source of energy still represents important part of energy sector and will be in near future. So there is a demand on reducing environment harmness to lowest levels possible. Combustion processes are source air of pollution and one of the main harm substances are nitrogen oxides. Work deals with their properties, environmental impacts, mechanisms of creation, options leading to avoiding their occurence and methods leading to their elimination in flue gas i n case primary methods fail to succeed. Possibility of using dimensional analysis for prediction of occuring nitrogen oxides amount is analysed and possible usage for optimalisation of combustion proces. Next part contains CFD model of nitrogen oxide generation in hot blast stove. Main part contains combustion test of selective non-catalytic reduction technology on industrial boiler with scope to side effects of the proces. Simplified calculation of reduction substance (urea solution) is made for both technologies for comparison. Last part shows results of combustion test of aditive usage in industrial boiler which has been made to decrease amount of unburnt carbon in fly ash.