Patent ID: 8550016
Filing Date: 2013-10-08
Classification: F22B,F23C,F23L,F23N,Y02E

Abstract:
1. An apparatus of controlling a flow rate of a primary recirculating exhaust gas in an oxyfuel combustion boiler wherein while oxygen fed from an oxygen producer is being introduced into a coal burning boiler, a part of an exhaust gas in recirculation is introduced as the primary recirculating exhaust gas into a mill, with the primary recirculating exhaust gas carrying pulverized coal pulverized by the mill to a burner for oxyfuel combustion, the apparatus comprising: a CO an O a flowmeter for sensing the flow rate of the primary recirculating exhaust gas to be led to the mill; a flow regulator for regulating the flow rate of the primary recirculating exhaust gas to be led to the mill; a coal-feed-amount meter for sensing coal feed amount to be fed to the mill; and a controller for calculating specific gravity of the primary recirculating exhaust gas on the basis of the CO