Analysis of Oscillating Combustion for NOx?Reduction in Pulverized Fuel Boilers

Thermal power plants in different fields are regularly adapted to the state-of-the-art emissions standards, applying “The Best Available Techniques Reference”. Since 2016 plant area new, more stringent limits for units with a thermal output of than 300 MW operated black coal valid. Usually, order reach new e.g., NOX emissions, downstream reduction processes (Selective Non-Catalytic Reduction, SNCR or Selective Catalytic Reduction) applied, which use operating resources (essentially ammonia water) thereby increase. By means an experimentally validated process, by pulverized fuel is fed oscillation through swirl burner into pilot combustion chamber 2.5 MW, nitrogen oxides can be reduced without further activities, instance from 450 mg/mN3 non-oscillation operation mode (0 Hz) 280 (3.5 Hz), normalized O2–content 6% each. These findings were patented EP3084300. Particularly promising experiments utilize large portion burn out air instead minimize fatigue oscillator, amongst others. Thereby, conversion rate, describes ratio nitrogen, including 26% down 16%. The present show that alone not sufficient achieve concentrations below legislative values. Therefore, combination primary (and secondary) measures required. This paper presents experimental results oscillating coal-dust firing. Furthermore, expert model based on multivariate regression developed evaluate results.