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The cross or semi-cross wet scrubber combines spray and packed bed sections followed by a mist eliminator in a horizontal box for maximum separation of soluble gases, particulate matter, and mist particles below 0.5 mm size. These scrubbers are usually classified as medium energy scrubbers and have a pressure drop of 150-230 mm water gauge, although they can be higher energy depending on the system requirements.

Kimre recognizes that a single vessel can contain the following stages:

• Precooling and wetting
  
• Pre-cleaning of particulate matter
  
• Humidification and cooling
  
• Separation of medium to large size particles
  
• Stage-wise absorption of soluble gases
  
• Simultaneous collection of fine to medium size particulates
  
• Direct contact heat transfer
  
• Final separation of fine particles, mist, and aerosols