DESIGN METHODOLOGY GOAL Produce a design for a chemical plant that: 9 Is economically acceptable ◆ Is operable,,ie, Is safe → Is controllable Es reliable, and Els environmentally acceptable 1/31/99 Design Methdology -Intro
1/31/99 Design Methdology - Intro 1 DESIGN METHODOLOGY GOAL -- Produce a design for a chemical plant that: u Is economically acceptable and uIs operable, i.e., ðIs safe ðIs controllable ðIs reliable, and ðIs environmentally acceptable
What are the basic steps in designing a chemical process 1/31/99 Design Methdology -Intro
1/31/99 Design Methdology - Intro 2 What are the basic steps in designing a chemical process?
Determine Specifications Generate Alternate Conceptual Designs Design #1 Design #2: Design #3: 限限重重果聚果美重限 Evaluate Design Criteria 0 Y es Iterate OK? D one 1/31/99 Design Methdology -Intro
1/31/99 Design Methdology - Intro 3 Determine Specifications Generate Alternate Conceptual Designs Design #1 Design #2 Design #3 Evaluate Design Criteria OK? Yes Done No Iterate
DESIGN METHODOLOGY PHASES Q Phase I. Conceptual Design E Generate alternate designs E Select best based on performance indices Phase IL. Detailed design E Rigorous equipment design E Develop command and control strategy E Rigorous reliability and safety analysis Phase ill. Mechanical design 1/31/99 Design Methdology -Intro
1/31/99 Design Methdology - Intro 4 DESIGN METHODOLOGY PHASES u Phase I. Conceptual Design ðGenerate alternate designs ðSelect best based on performance indices uPhase II. Detailed Design ðRigorous equipment design ðDevelop command and control strategy ðRigorous reliability and safety analysis uPhase III. Mechanical Design
GENERATION OF ALTERNATE FLOWSHEETS BY HIERARCHICAL DECOMPOSITION Q Level 1: Choice of process type Q Level 2: Input-Output Structure Level 3: Recycle structure Level 4: Separation System synthesis Q Level 5: Heat and Power Network Synthesis Levels 2 through 5 will depend upon the choice of process type (Based on J.M. Douglas, Conceptual Design of Chemical Processes, McGraw-Hill. 1988 1/31/99 Design Methdology -Intro 5
1/31/99 Design Methdology - Intro 5 GENERATION OF ALTERNATE FLOWSHEETS BY HIERARCHICAL DECOMPOSITION uLevel 1: Choice of process type uLevel 2: Input-Output Structure uLevel 3: Recycle Structure uLevel 4: Separation System Synthesis uLevel 5: Heat and Power Network Synthesis Levels 2 through 5 will depend upon the choice of process type. (Based on J.M. Douglas, Conceptual Design of Chemical Processes, McGraw-Hill, 1988)