Abstract: In this study,a modular fault tree analysis method has been proposed based on the relative importance for identifying the failure factors associated with bag filters.By considering the fault tree of the bag filter as an example,the depth-first left-most traversal was used to obtain independent sub-modules.The relative importance of the modules and the minimally cut set were obtained to achieve rapid fault location.This result is beneficial for ensuring the improvement and perfection of bag filter,providing a basis for conducting further research on the fault diagnosis expert system of bag filters.

Key words: dedusting system, fault tree, modularization, filter bag failure