Abstract:

Abstract:According to the survey results of rotary air preheaters in large capacity thermal power units,the performances of more than 80% of rotary air preheaters appear different degree of deterioration and that caused the decreasing of unit output.This paper built the performance diagnosis model and found the reason that caused the performance decreasing of a rotary air preheater,and then it proposed preventive measures to ensure the safe running of an air preheater,which were proved effective by living examples.

Key words: Keywords:air preheater, diagnosis model, leakage rate, dynamic debugging