Talk on PFD and P&ID Development for UM Chem Eng Students


Integration in Process Plant Design
Category Description
Hints
  • Big picture first, details later
  • Sequence: Block Diagrams-->Schematics-->PFDs-->P&IDs Flowchart
  • NOT after you have designed your individual Unit Op
  • Use block diagrams within PFDs if overall process is too complicated
Design Concepts
  • Perform Energy Pinch Analysis to minimise external heating and cooling requirements
  • Develop Heat Exchanger Networks (HEN) where one unit is not sufficient
  • Perform Life Cycle Analysis (LCA)
  • Perform Carbon Emissions Pinch Analysis (CEPA)
  • Material Exchange: Pay attention to "feed from" and "to" streams:
    • Ensure correct stream specifications (pressure/temperature/composition) to next Unit Op
    • Add recycle stream(s) to optimise yields
    • Add off-spec / waste / vent / flare streams
  • Show required control (final control devices and control loops) for combined/integrated process - eliminate unnecessary/conflicting process control loops
  • Show planned future equipment/systems/unit ops e.g. compression facilities in offshore O&G Production to cater for declining reservoir pressure
  • Show OSBL (Outside Battery Limits) in addition to ISBL (Inside Battery Limits) facilities where appropriate
Self-check of Integrated Plant Design
  • Review Block Diagrams, Process Schematics, PFDs and P&IDs
  • Check for mistakes/deficiencies as per "Common Mistakes"
  • Revise PFDs and P&IDs in line with Block Dia / Schematics / PFDs / P&IDs
Integrated Control Sample
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