Because the flame detection and diagnosis technology of boilers have a great significance on unit safety operation

a combustion diagnosis and temperature distribution measurement system based on image processing technique is estabilshed in this paper

The system is installed on the BC level of 300MW utility boiler

which has the following functions: displaying flame image

recording historical data

predicting dynamic trend

calculating temperature distribution

etc. Technologies such as radiation heat transfer

optics

computer picturing

computer image processing are synthetically utilized

and a sectional temperature distribution calculation method is proposed

The basic errors are compared and analyzed.