ACOUSTIC MONITORING FOR FLUIDIZED BED BOILERS

Y. Fukayama, M. Horio, K. Matsumoto, K. Shimohira

Abstract

The newly developed monitor watches the fluidized condition of FBC (Fluidized Bed Combustor), referring to acoustic signals which are collected by heating tubes in the beds and passing to tube acceleration sensors outside the fluidized Beds. The monitor, without any observation hole or special probes, not only detects the bad-fluidized region, which requires proper operations for preventing from agglomeration, but also diagnoses conditions of the boiler equipment. The monitor adopts the joint time-frequency analysis technique to the acoustic signals as well as considers non-Gaussian properties, on decision making procedure, including skewness and excess of parameter distributions which are the resulting characteristics through the analyses on the time-frequency plain. The monitor has been applied to an 350 MWe FBC for testing, and validated through one and a half year operation.

Keywords

acoustic monitor, time-frequency analysis, non-Gaussian

Download

IMEKO-WC-2000-TC10-P264.pdf

DOI

-

IMEKO TC

TC10 - Measurement for Diagnostics, Optimization and Control

Back to the proceedings