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Vapor-liquid separator

  A vapor-liquid separator is a vertical vessel used in several industrial applications to separate a vapor-liquid mixture. Gravity causes the liquid to settle to the bottom of the vessel, where it is withdrawn.[1][2][3][4] The vapor travels upward at a design velocity which minimizes the entrainment of any liquid droplets in the vapor as it exits the top of the vessel.

The feed to a vapor-liquid separator may also be a liquid that is being partially or totally flashed into a vapor and liquid as it enters the separator.

A vapor-liquid separator may also be referred to as a flash drum, knock-out drum, knock-out pot, compressor suction drum or compressor inlet drum.

When used to remove suspended water droplets from streams of air, a vapor-liquid separator is often called a demister.

Where vapor-liquid separators are used

Vapor-liquid separators are very widely used in a great many indusries and applications, such as:

See also


  1. ^ William D. Baasel (1990). Preliminary Chemical engineering Plant Design, 2nd Edition, Van Nostrand Reinhold. ISBN 0-442-23440-6. 
  2. ^ David H.F. Liu (1997). Environmental Engineers' Handbook, 2nd Edition, CRC Press. ISBN 0-8493-9971-8. 
  3. ^ Stanley S. Grossel (June 2004). "Design and sizing of knock-out drums/catchtanks for emergency relief systems". Plant/Operations Progress (AIChE) 5 (3): 129-135. ISSN 0278-4513.
  4. ^ Stanley M. Walas (1988). Chemical Process Equipment:Selection and Design. Butterworth- Heinemann. ISBN 0-409-90131-8. 
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Vapor-liquid_separator". A list of authors is available in Wikipedia.
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