CHEN Zhangqiao1, GONG Lingzhu1,2, CHEN Shiwang2,3, YANG Xiaoxiang3

 

(1. School of Chemical Engineering, Fuzhou University, Fuzhou 350108, China;

 

2. Fujian Special Equipment Inspection Institute, Fuzhou 350001, China;

 

3. School of Mechanical Engineering and Automation, Fuzhou University, Fuzhou 350108, China)

 

 

Abstract: Aiming at the problems of power station boiler level of risk evaluation, the fuzzy comprehensive evaluation was investigated. After the analysis of failure factors and the important degree of various influencing factors of power plant boiler, a more scientific evaluation index system of power station boiler suitable for online evaluating was established. A method was presented to combine the fuzzy comprehensive evaluation with improved fuzzy analytical hierarchy process. The weight of each factor of the index system was calculated by improved fuzzy analytical hierarchy process. The comprehensive evaluation method was applied to evaluate the influence factors of a certain power plant boiler′s practical operation condition. The fuzzy composite operator was applied to calculate assessment result. The results indicate that the level of risk assessment of the influence factors is the sixth grade, which means its failure probability is small and the power plant boiler operation condition is good.

 

Key words: fuzzy comprehensive evaluation; improved fuzzy analytical hierarchy process; power plant boiler; risk assessment; operation condition