Steps
Step 1
Design Basis Definition
This step is a critical element in chemical engineering projects, using chemical engineering principles and professional methods to solve process problems. Chemical engineering emphasizes transport phenomena and reaction engineering, requiring rigorous thermodynamic analysis and material/energy balance at every step. Industry standard methods and professional chemical engineering software are used to ensure design reliability and economics.
• Develop detailed technical solutions and calculation methods according to chemical engineering design specifications and standards
• Use professional chemical engineering software (Aspen Plus/PROII/ChemCAD, etc.) for process simulation and optimization calculations
• Perform material balance and energy balance verification, ensuring results are accurate and reliable and meet engineering requirements
Deliverable: Chemical engineering design report (including process flow diagram, material and energy balance, equipment selection, economic analysis) | Quality standard: Standard methods, accurate data, reasonable design, economically feasible
Step 2
Process Flow Design
This step is a critical element in chemical engineering projects, using chemical engineering principles and professional methods to solve process problems. Chemical engineering emphasizes transport phenomena and reaction engineering, requiring rigorous thermodynamic analysis and material/energy balance at every step. Industry standard methods and professional chemical engineering software are used to ensure design reliability and economics.
• Develop detailed technical solutions and calculation methods according to chemical engineering design specifications and standards
• Use professional chemical engineering software (Aspen Plus/PROII/ChemCAD, etc.) for process simulation and optimization calculations
• Perform material balance and energy balance verification, ensuring results are accurate and reliable and meet engineering requirements
Deliverable: Chemical engineering design report (including process flow diagram, material and energy balance, equipment selection, economic analysis) | Quality standard: Standard methods, accurate data, reasonable design, economically feasible
Step 3
Material and Energy Balance
This step performs detailed calculations of chemical engineering processes, obtaining quantitative design parameters and performance indicators. Calculation is the core means of chemical engineering design, providing quantitative basis for process design through material balance, energy balance and equipment calculation. Must strictly follow chemical engineering design specifications and standards, ensuring accurate and reliable calculation results.
• Determine calculation methods and formulas, clarify theoretical basis and assumptions, draw calculation flow chart
• Perform process simulation calculations using Aspen Plus or PROII, obtain material stream data and equipment parameters
• Manually verify key calculation results, cross-validate through empirical formulas or simplified models, ensuring calculation accuracy
Deliverable: Calculation document (including calculation formulas, calculation process, result data table, simulation files, validation comparison) | Quality standard: Correct calculation method, clear process, accurate results, sufficient verification
Step 4
Equipment Selection and Layout
This step is a critical element in chemical engineering projects, using chemical engineering principles and professional methods to solve process problems. Chemical engineering emphasizes transport phenomena and reaction engineering, requiring rigorous thermodynamic analysis and material/energy balance at every step. Industry standard methods and professional chemical engineering software are used to ensure design reliability and economics.
• Develop detailed technical solutions and calculation methods according to chemical engineering design specifications and standards
• Use professional chemical engineering software (Aspen Plus/PROII/ChemCAD, etc.) for process simulation and optimization calculations
• Perform material balance and energy balance verification, ensuring results are accurate and reliable and meet engineering requirements
Deliverable: Chemical engineering design report (including process flow diagram, material and energy balance, equipment selection, economic analysis) | Quality standard: Standard methods, accurate data, reasonable design, economically feasible
Step 5
Economic Analysis and Report
This step performs thermodynamic analysis and exergy analysis of chemical processes, revealing process energy utilization efficiency and irreversible losses. Exergy analysis is an advanced method for evaluating process energy quality, quantifying exergy losses of each unit based on the second law of thermodynamics, identifying weak links in energy utilization. Provides directional guidance for energy-saving retrofitting and process optimization.
• Determine environmental state parameters (T0, P0), calculate enthalpy, entropy and exergy values of each stream, establish exergy balance equations
• Calculate exergy loss and exergy efficiency of each unit equipment, identify key equipment with maximum irreversible loss
• Plot heat integration temperature-enthalpy diagram (T-H diagram) and pinch analysis, determine minimum utility consumption and energy saving potential
Deliverable: Exergy analysis report (including exergy balance table, unit exergy loss distribution diagram, pinch analysis diagram, energy saving potential assessment) | Quality standard: Exergy balance closed, clear loss distribution, reasonable energy saving potential analysis