Mechanical Separations in Heterogeneous Mixtures
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Questions and Answers

What is the primary principle behind mechanical separations?

  • Electromagnetic interactions between particles
  • Chemical reactions between particles
  • Physical differences between particles (correct)
  • Nuclear reactions between particles
  • What is the main purpose of baffles in a gravity settling chamber?

  • To collect dust particles
  • To reduce the cross-sectional area of the chamber
  • To spread the incoming flow evenly across the settling chamber (correct)
  • To increase the gas velocity inside the chamber
  • What type of mixtures are mechanical separations applicable to?

  • Heterogenous mixtures (correct)
  • Suspensions
  • Homogenous solutions
  • Emulsions
  • What is the effect of reducing the gas/fluid velocity in a gravity settling chamber?

    <p>Dust particles settle out by the action of gravity</p> Signup and view all the answers

    What would be the result of not using baffles in a gravity settling chamber?

    <p>Poor particle collection</p> Signup and view all the answers

    Study Notes

    Mechanical Separations

    • Applicable to heterogeneous mixtures, not homogeneous solutions
    • Based on physical differences between particles, including:
      • Size
      • Shape
      • Density
    • Used to separate:
      • Solids from gases
      • Liquid drops from gases
      • Solids from solids
      • Solids from liquids

    Gravity Settling Chamber

    • Simplest type of dust collection equipment
    • Consists of a chamber with reduced gas/fluid velocity to enable dust particles to settle out via gravity
    • Key features:
      • Large cross-sectional area compared to ducts
      • Baffles used to spread incoming flow evenly across the settling chamber
    • Importance of baffles:
      • Prevents poor particle collection due to uneven flow

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    Learn about the principles and applications of mechanical separations, including techniques based on physical differences between particles, such as size, shape, and density.

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