Fluidized bed bubbling state grasping method, fluidized bed bubbling state maintenance method, and fluidized bed bubbling state stabilization method

摘要

PROBLEM TO BE SOLVED: To provide a grasping method capable of accurately grasping a fluidized bed bubbling state of a bubbling type fluidized bed reactor, and a method for maintaining and stabilizing an appropriate bubbling state. A method for grasping a fluidized bed bubbling state is to flow a fluidized bed in a bubbling type fluidized bed reactor by blowing a fluidized gas from the bottom of the fluidized bed filled in the lower part of the furnace. It is used to grasp the bubbling state of the formed fluidized bed, and at least one infrared camera provided at a position looking down from the upper part or the lateral upper part of the fluidized bed interface is used to emit light of a wavelength not emitted by a flame. Based on the thermal image acquisition step of acquiring and storing a thermal image with respect to the fluidized bed interface via a selective transmission filter that selectively transmits, and the thermal image acquired in the thermal image acquisition step. The bubbling state abnormality determination step of determining whether or not an abnormality has occurred in at least a part of the fluidized bed is included. [Selection diagram] Fig. 1