Pressurized fluid dynamic furnace equipment of control valve control device, control valve control method of pressurized fluid dynamic furnace equipment

摘要

PROBLEM TO BE SOLVED: To provide a control valve controller of a pressurized-fluidized furnace that can keep a combustion state steady while making a facility structure simple.;SOLUTION: A control valve controller includes: a control valve for regulating a bypass rate of an exhaust gas from a supercharger; a flow rate control unit for calculating a control variable to open/shut the control valve based on a difference between a measured flow rate of combustion air to be supplied to the pressurized-fluidized furnace and a preset flow rate; a pressure control unit for calculating a control variable to open/shut the control valve based on a difference between a measured pressure in the pressurized-fluidized furnace and a preset pressure; and a control valve control unit for controlling the control valve according to the control variable calculated by the flow rate control unit when the difference between the flow rate of combustion air and the preset flow rate is out of a predetermined range, and for controlling the control valve according to the control variable calculated by the flow rate control unit and the control variable calculated by the pressure control unit when the difference between the flow rate of combustion air and the preset flow rate is within the predetermined range.;COPYRIGHT: (C)2014,JPO&INPIT