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Distillation Column Internals

2 days PSE/INCOL-E
  • Engineers and supervisory staff in the refining, petrochemical and chemical industry, involved in the design, selection or operation of the internals in distillation columns or their equivalent.
  • To provide a thorough and practical understanding of the working principles and use of trays and packing installed in many columns for distillation, absorption, stripping, washing, etc.
Learning Objectives
  • To know the different types of internals, their advantages and disadvantages.
  • To investigate the main criteria for choice according to their respective operating field.
  • To identify the basic features for design.
  • To learn about operating range and troubleshooting of equipment.
Ways and means
  • Active participation of trainees using an equipment sizing software.

Technology and functioning of trays 1 day
  • Basics of mass transfer between liquid and vapor: importance of the interface area, viscosity and relative volatility.
  • Definition of some working parameters: efficiency, capacity, flexibility, pressure drop, etc.
  • Different types of trays: with or without downcomers.
  • Different types of contacting systems for the active area: bubble caps, fixed or mobile valves.
  • Hydraulic working and pressure drops.
  • Troubles such as flooding, weeping, fouling, etc.
  • Main parameters to take into account in the design of internals.
  • Specific features for multi-pass trays.
  • Equipment for transition zones as flash zone, changing of pass number, etc.
  • Aim of high performance trays and working principles. Advantages and fields of use.
  • New technology trays and implementation in the near future.
  • Example:
  • simulation of tray design; representation of trays in operation (video)
  • implementation of HP trays and feedback information
Technology and functioning of packed beds 0.75 day
  • Random packing, structured packing, grids.
  • Technology of a packed bed in operation.
  • Operating range and pressure drop.
  • Recent evolution of packing.
  • Liquid or vapor distributors, collectors and redistributors.
  • Impact on the working and performance of packed beds.
  • Example:
  • representation of packing in operation (video); implementation of packing and evaluation of performances
  • presentation of tests in the manufacturer's workshop
Comparison and troubleshooting of beds and packings 0.25 day
  • Advantages and disadvantages of trays and packed beds, costs.
  • Respective technical performances: capacity, pressure drops, flexibility, implementation.
  • Detection of disturbances in the field and data analysis.
  • Potential solutions and efficiency.
  • Gammametry: method and examples of diagrams.
  • Example:
  • revamping an existing column
  • case study of disturbed equipment, diagnosis and remedy