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Frontiers in Energy >> 2007, Volume 1, Issue 1 doi: 10.1007/s11708-007-0009-7

Study on the NOx release rule along the boiler during pulverized coal combustion

College of Power Engineering, University of Shanghai for Science & Technology, Shanghai 200093, China;

Available online: 2007-03-05

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Abstract

Numerical simulation and experimental study on NO release along the boiler during pulverized coal combustion have been conducted. With the increase of temperature the NO emission increased and the peak value of NO release moved forward. But when the temperature increased to a certain degree, NO emission began to reduce. NO emission increased with the increase of nitrogen content of coal. The peak value of NO release moved backwards with the increase of coal rank. NO emission increased obviously with the increase of stoichiometric ratio. There existed a critical average diameter of the pulverized coal (). If "d, NO emission reduced with the decrease of pulverized coal size. If >, NO emission reduced with the increase of the pulverized coal size. The results showed that the simulation results are in agreement with the experimental results for concentration distribution of NO along the axis of the furnace.

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