Vertical Tube Evaporator
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Questions and Answers

What is the main disadvantage of using a vertical tube evaporator for thermolabile solutions?

  • Repetitive contact with a hot surface via the influence of central down take (correct)
  • Inability to concentrate solutions
  • High cost associated with operation
  • Limited heat transfer and evaporation rates

    • Why is a basket tube evaporator unable to concentrate solutions effectively?

  • Continuous convection currents providing better heat transfer
  • Inability to prevent particles from moving down
  • Contact with hot surface via the influence of central down take
  • Presence of narrow tubes between two tube sheets (correct)

    • What differentiates the operation of a basket tube evaporator from a vertical tube evaporator?

  • Presence of a cylindrical body surrounding the heating surface
  • Movement of solution from bottom to top inside tubes for heat transfer (correct)
  • Use of a wide central down take tube
  • Use of a cover and bottom in the evaporating chamber

    • Why is a vertical tube evaporator considered more efficient in terms of heat transfer compared to a basket tube evaporator?

    <p>Continuous convection currents enhancing heat transfer</p> Signup and view all the answers

    Which feature of a long tube evaporator prevents particles from moving down in the narrow tubes?

    <p>High uprising velocity of molecules adjacent to the tubes</p> Signup and view all the answers

    What characteristic makes basket tube evaporators unsuitable for use with viscous solutions?

    <p>Repetitive contact with hot surface via central down take</p> Signup and view all the answers

    What type of solutions is the horizontal tube evaporator used for?

    <p>Non-viscous solutions that do not deposit crystals</p> Signup and view all the answers

    Why is the horizontal tube evaporator considered inefficient?

    <p>Low evaporation rate due to the cutting of convection current by horizontal tubes</p> Signup and view all the answers

    What type of solutions cannot be processed using a horizontal tube evaporator?

    <p>Viscous solutions and thermolabile materials</p> Signup and view all the answers

    What is a notable advantage of a horizontal tube evaporator in terms of cost?

    <p>Low cost per square meter of heating surface</p> Signup and view all the answers

    Why can't a horizontal tube evaporator be used for concentrating viscous solutions?

    <p>Continuous cutting of convection current by horizontal tubes</p> Signup and view all the answers

    How does heat transfer occur in a vertical tube evaporator?

    <p>By natural convection only</p> Signup and view all the answers

    Which type of evaporator allows the basket to be removed for cleaning, repairing, and maintenance?

    <p>Basket Tube Evaporator</p> Signup and view all the answers

    What is a disadvantage of using the Basket Tube Evaporator?

    <p>Repetitive contact with hot surfaces</p> Signup and view all the answers

    How does heating in the Long Tube Evaporator lead to bubble formation?

    <p>Small air bubbles form and increase in number and size over time</p> Signup and view all the answers

    Why can't the Basket Tube Evaporator be used for thermolabile solutions?

    <p>Due to repetitive contact with hot surfaces</p> Signup and view all the answers

    What is the advantage of using a Long Tube Evaporator?

    <p>Reduced entrainment</p> Signup and view all the answers

    What characteristic prevents the Basket Tube Evaporator from being used for thermolabile solutions?

    <p>Continuous contact with hot surfaces</p> Signup and view all the answers

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