OXY-FUEL COAL BURNER DESIGN: FROM CFD MODELING TO PILOT SCALE TESTING

摘要

This paper presents a series of combustion tests conducted on the Vertical Combustor Research Facility of the CANMET Energy Technology Centre to evaluate the performance of a burner design optimized for oxy-fuel combustion of coal. The tests were conducted with a high volatile lignite coal at a heat input of 0.21 MWth, with both air firing and oxygen firing. The flue gas compositions were monitored closely during the tests and extensive flame probing was conducted. The results were then compared to those obtained with CFD modeling and showed exceptionally good agreement with the model predictions. These results confirmed the superiority of the current design compared to previous ones by considerably decreasing NOx formation during oxygen firing of the coal while maintaining excellent fuel burnout.