Term “scrubber” is being referred to pollution control devices which are using liquid to wash unwanted pollutants from a gas stream. Scrubber systems such as chemical scrubbers, gas scrubbers
are a diverse group of air pollution control devices. Installation purpose of scrubber is to neutralize harmful components in industrial air or waste gas streams. The removal of gas particles causing many problems from the gas stream during the process is necessary before disposing of the gases in the open air.

Types of Scrubbers:

• Wet Scrubber:
  Its a device that forms an air pollution control system, to remove certain compounds, particles and gases from the exhaust streams. This system uses water and other additives to trap the gaseous pollutants. The removal of the gases from power plant emissions enables the gases to be recycled.

Features:

• Ability to handle high temperature and moisture.
• Flue gases are cooled.
• Remove both gases and particulate matter.
• Neutralize destructive gases.

• Dry Scrubber

A dry scrubber system is designed to remove harmful materials from polluted gases of industrial exhaust before they are released into the environment. It is mainly used to eliminate acidic gases that contribute to acid rain by utilizing a collection of dry substances such alkaline slurry.

Features:

• It does not produce any wet sludge.
• It is able to collect acid gases efficiently.
• It can handle gas streams at higher temperatures.
• It hardly has any maintenance costs.
• The use of dry scrubbers is less expensive as there is no associated cost with removing, transporting, and storing waste water from wet scrubbers.