Research on Nitrogen Oxides Release Performance of Superfine Pulverized Coal Combustion

Experimental and numerical simulation study on NO_x release from superfine pulverized coal combustion and the effect factors such as particle size, temperature, stoichiometric ratio, coal sort have been done. Results show that the NO_x release concentration of superfine pulverized coal deceases compare with the normal pulverized coal size; NO_x emissions increase obviously with stoichiometric ratio increasing; .NO_x release behavior is different for different type coal, the quantity of NO_x release from superfine pulverized coal deceased obviously for longkou lignite, but deceased appreciably for jincheng anthracite; as the temperature in furnace increasing, NO_x emissions increase, but when the temperature increased to some extent, NO_x emissions reduces with the temperature increases. So that, if superfine pulverized coal as reburing fuel, the reduction efficiency of NO_x will higher than normal pulverized coal as reburing fuel, especial for longkou lignite. Overall reasonable agreement between the simulating and experimental results for NO_x release behavior is obtained. Figs 6, tables 2 and refs 2.