(500d) A Novel Method to Compare Chemical Process Flowsheets
In this work, we develop a novel comparison method to compare chemical process flowsheets. In the first step, we identify key process units in a chemical flowsheet. Subsequently, the flowsheet is converted into a tree with identified key units. Each node in the resulting tree corresponds to a key unit. We perform a depth-first graph traversal to store the process information in each key node. In this process, the traversal history is stored as an ordered sequence. Similar structures of two process flowsheets are then identified by comparing sequences in key nodes. We use the F1 score to measure the similarity between two compared sequences. Several case studies are conducted, including a comparison of 14 flowsheets covering 7 diverse chemical products. The results show that the proposed method successfully identifies multiple similar structures in two compared flowsheets.
Keywords: flowsheet comparison, sequence alignment, pattern recognition
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