Abstract
A unified strategy for retrofit synthesis of process flowsheets and operating procedure planning is presented. This stragegy introduces structural actions (operators) as options for producing satisfactory sets of operating procedures for chemical processing systems, allowing synthesis of operating procedures in otherwise infeasible situations. Incorporation of stationary states by structural changes to the original flowsheet is used to increase process flexibility and add modularity and verifiability to the operating procedures. The methodology requires the initial flowsheet description, local and global constraints, the initial and goal states, possible procedural and structural actions, a unit model library and safety/reliability and economic evaluation functions. It produces sets of process flowsheets and corresponding operating procedures. Structural actions designed to support stationary states are used to propose flowsheet changes when operating procedures are infeasible or unsatisfactory. Parts of the strategy have been implemented in a computer program, the Procedural and Structural Planner (PSP) and tested on a hydrocarbon chlorination example.
Published Version
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