FLUIDIZED BED BOILER, FLUIDIZED BED TEMPERATURE UNIFORMIZING METHOD AND FLUIDIZED BED TEMPERATURE UNIFORMIZING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a fluidized bed temperature uniformizing method capable of maintaining a temperature across an entire fluidized bed within a target temperature range, by determining an actual air ratio region of the fluidized bed and then controlling supply amount of primary air.;SOLUTION: A fluidized bed temperature uniformizing method includes: a temperature measurement step of measuring a section temperature of each of a plurality of sections of a fluidized bed; a temperature comparison step of comparing the measured section temperature with a target temperature range; an air ratio region determination step of determining in a control target section of which section temperature is deviated from the target temperature range, whether an air ratio of the control target section is in a low air ratio region in which air amount runs short relative to a theoretical air ratio or in a high air ratio region in which the air ratio becomes excessive relative to the theoretical air ratio; and an air amount control execution step of executing air amount control for increasing or decreasing the supply amount of primary air to be supplied to the control target section so that the section temperature falls within the target temperature range on the basis of a determination result obtained in the air ratio region determination step.;SELECTED DRAWING: Figure 4;COPYRIGHT: (C)2018,JPO&INPIT