Gas Scrubber: Difference between revisions

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(Added some more links under the "See Also" section)
(Added some more links under the "Useful Links" section)
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=Useful Links=
=Useful Links=
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*[https://www.youtube.com/watch?v=I2MvR5pMPdQ&list=PLq6IzRhDFdPOzkShxViaD9rWiwfnECmuh&index=3&t=0s One Open Source Design]
*[https://www.youtube.com/watch?v=D-gri7_roMg&list=PLq6IzRhDFdPOzkShxViaD9rWiwfnECmuh&index=4 A Later Iteration of the above design]

Revision as of 17:13, 15 March 2020

Basics

  • The industrial equivalent of an Air Purifier
  • Can use one, or man steps/methods
  • Typically used for filtration of chemicals, but often particles as well
  • More dust focused units may be called Dust Collectors

Methods/Steps

Cyclonic Filtration

  • Useful for removing particles such as Flue Ash
  • Also used in dust evacuation systems in machine shops, and in vacuum cleaners
  • Although not used for this in most industrial applications, the consumer vacuum cleaner company, Dyson, maketed a model with seccondary cyclones supposedly capable of getting near HEPA preformance
    • This was acheived via a small neck, so small that semi-flexible portions were needed to allow clog preventing vibration
    • Also there was a final HEPA filter, but this was supposedly more of a backup
  • Most units in industry have only the "primary" cyclone for large to medium-small particles (essentiall no smaller than fine sawdust and large dust
  • Cyclonic Vacuum Cleaners tend to also have a smaller seccondary cyclone (or muliple to increase flow), that is used for more fine particles

Electrostatic Precipitation

  • Electrically Charges the air and/or particles, then uses a "negative" electrode to cause them to precipitate

Dry Catalysts

  • This is used to change some chemical pollutants into either less harmful forms, or ordinary chemicals
  • this is used on most moder cars
  • More expensive, yet also more compact and simple

Settling Chamber

  • Use space to allow particles to settle
  • Most effective for in-line use is some sort of baffle chamber
  • Mainly used for larger particles

Fluidized Bed

  • Fluidized Bed Scrubbers
  • Uses either catalysts or carbon/activated carbon to react with and/or absorb pollutants from gas streams
  • Complex yet effective
  • Mainly used for gasous chemical pollutants

Thermal Methods

Wet Scrubbers

  • Essentially using liquids to absorb and/or react with particles and gasses in the gas stream
  • Water can work for many applications such as remooving hydrogen sulphide (it turns to sulphuric acid, this was a product of historical gasworks, although most modern sulphuric acid comes from the Claus Process )
  • Other liquids have their own applications
  • For designs of these see Gas-Liquid Contactor

OSE Layouts

Heat Exchange/Heating/Cooling

Dust/Particles Removal

  1. Primany Cyclone
  2. Seccondary Cyclone(s)
  3. Electrostatic Precipitator
  4. Failsafe Filterbag/HEPA/ULPA Filter etc

Chemical Pollutants

Concentrator Stage

Filtration/Treatment Methods


See Also

Useful Links