Air Pollution and Control: Wet Scrubber

 Wet Scrubber:

In wet scrubbing processes, liquid or solid particles are removed from a gas stream by transferring them to a liquid. The liquid most commonly used is water. A wet scrubber's particulate collection efficiency is directly related to the amount of energy expended in contacting the gas stream with the scrubber liquid. 

 Construction and Working of wet scrubber:

    In wet scrubbing processes, liquid or solid particles are removed from a gas stream by transferring them to a liquid. The liquid most commonly used is water. A wet scrubber's particulate collection efficiency is directly related to the amount of energy expended in contacting the gas stream with the scrubber liquid. 





The simplest type of wet scrubber is a spray tower. Water is introduces by using spray nozzle. It consist of a shell where liquid droplet falls by gravity through the gas stream flowing towards a demister and gas outlet.

   Dirty gas enters into shell simultaneously water enters into the shell water can remove the particulate matter of less than 0.2um in dia.

Advantages of wet scrubber:

1.      Low initial cost

2.      High collection efficiency for small particles

3.      Applicable for high temp


      Disadvantages of wet scrubber:

1.      High power consumption for higher efficiency.

2.      High maintenance cost due to corrosion.

3.      Disposal problem.



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