Method and apparatus of controlling combustion in oxyfuel combustion boiler
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[0079]Embodiments of the invention will be described with reference to the accompanying drawings.
[0080]Referring to FIGS. 1 to 3 showing an embodiment of the invention, reference numeral 1 denotes a coal bunker for coal storage; 2, a coal feeder for feeding coal stored in the bunker 1; 3, a mill for pulverization and drying of the coal from the feeder 2; 4, a coal burning boiler; 5, a wind box fitted to the boiler 4; 6, a burner disposed in the wind box 5 for burning pulverized coal from the mill 3; 7, an exhaust gas line through which flows an exhaust gas emitted from the boiler 4; 8, an air preheater for heat exchange of the exhaust gas flowing through the exhaust gas line 7 with primary and secondary recirculating exhaust gases; 9, exhaust gas treating devices such as a desulfurizer and a dust collector for treatment of the exhaust gas passing through the air preheater 8; 10, an air separation unit for production of oxygen; 11, a forced draft fan (FDF) for forcedly sending the ex...
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