Gas Scrubber: Difference between revisions
Jump to navigation
Jump to search
(Added some more information) |
(Minor Clarification) |
||
(8 intermediate revisions by the same user not shown) | |||
Line 29: | Line 29: | ||
==Fluidized Bed== | ==Fluidized Bed== | ||
*[[Fluidized Bed Scrubbers]] | *[[Fluidized Bed Scrubbers]] uses catalysts | ||
*[[Fluidized Bed Concentrator]] | |||
*Uses either catalysts or carbon/activated carbon to react with and/or absorb pollutants from gas streams | *Uses either catalysts or carbon/activated carbon to react with and/or absorb pollutants from gas streams | ||
*Complex yet effective | *Complex yet effective | ||
*Mainly used for gasous chemical pollutants | *Mainly used for gasous chemical pollutants | ||
==Thermal Methods== | |||
*This uses mainly heating or cooling, and sometimes the addition of catalyts or other chemicals | |||
*[[Regenerative Thermal Oxidizer]] | |||
==Wet Scrubbers== | ==Wet Scrubbers== | ||
Line 40: | Line 45: | ||
*For designs of these see [[Gas-Liquid Contactor]] | *For designs of these see [[Gas-Liquid Contactor]] | ||
= | =OSE Layouts= | ||
* | ==Heat Exchange/Heating/Cooling== | ||
*Hot Flue Gas etc may require pre cooling | |||
*[[Heat Exchanger]] | |||
*[[Heatsink]] | |||
*[[Waterblock]] | |||
==Dust/Particles Removal== | |||
#Primany Cyclone | |||
#Seccondary Cyclone(s) | |||
#Electrostatic Precipitator | |||
#Failsafe Filterbag/HEPA/ULPA Filter etc | |||
==Aerosol/Gas Chemical Pollutants== | |||
===Concentrator Stage=== | |||
*May not be needed in all applications | |||
*[[Pressure Swing Absorbtion]] | |||
*[[Fluidized Bed Concentrator]] | |||
===Filtration/Treatment Methods=== | |||
*[[Regenerative Thermal Oxidizer]] | |||
*or | |||
*[[Wet Scrubber]] | |||
=Internal Links= | |||
*[[Biogas Upgrader]] | |||
=External Links= | |||
*[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] | |||
[[Category: Pollution]] | |||
Latest revision as of 20:32, 11 December 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 catalysts
- Fluidized Bed Concentrator
- 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
- This uses mainly heating or cooling, and sometimes the addition of catalyts or other chemicals
- Regenerative Thermal Oxidizer
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
- Hot Flue Gas etc may require pre cooling
- Heat Exchanger
- Heatsink
- Waterblock
Dust/Particles Removal
- Primany Cyclone
- Seccondary Cyclone(s)
- Electrostatic Precipitator
- Failsafe Filterbag/HEPA/ULPA Filter etc
Aerosol/Gas Chemical Pollutants
Concentrator Stage
- May not be needed in all applications
- Pressure Swing Absorbtion
- Fluidized Bed Concentrator
Filtration/Treatment Methods