Detailed%20Equipment%20Design

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Detailed Equipment Design

• Objective
• Attention to Details

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How Many Units to Design?One

• The More Complex of the Two Short-Cut Designs
• Examples
• Reactor
• Distillation Column
• Absorption Column
• Dryer

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Format for Detailed Design

• Unit summary - including operating conditions,
  production rate etc.
• Mention key design concerns
• List major assumptions with proper
  references/justifications

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Format for Detailed Design (Contd)

• Present design calculations
• Improve upon shortcut design wherever possible
• Design internals in more details (agitators,
  trays, distributors, heat transfer surface etc.)
• Select material of construction and calculate
  wall thickness

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Format for Detailed Design (Contd)

• Draw detailed drawing of the equipment with
  internals
• Discuss proposed instrumentation and control for
  the unit including safety device
• Show proposed instrumentation and control schemes
  on a separate drawing
• Prepare a specification sheet

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Main Reactor Types

• Fixed bed
• Fluidized bed
• Slurry bed
• Stirred Tank

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Gas Distributor (A Common Internal)

• Main Types
• Ring sparger
• Perforated Plate
• Perforated pipe

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Gas Distributors (Contd)

• Important Design Considerations
• Uniform flow through distributor orifices
• Low pressure drop while avoiding channeling
• Avoid plugging due to solid particles
• Avoid gas jets impingement on vessel walls can
  lead to pitting

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Uniform Flow Through Sparger Orifices
Criteria
(1)
(2)
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Uniform Flow Through Orifices
Orifice pressure Drop
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Example of Detailed Design in Guide Book Page
80-86

• Example of Gas Distributor Design on
• Page 77-79

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