Generally in chemical industries during manufacturing activities gases like SO2,SO3, NO2, NO3,HF, HCL generates from reactors. These fumes needs to be controlled at source, scrubbed properly and let out clean air to atmosphere.Fume Scrubbing System
Commonly used equipment is Packed Bed Scrubber. Scrubber is filled with packing material like polypropylene pall ring which provides more surface area for contact of gas & liquid. Gas/fumes are sucked from the bottom, liquid is sprayed from the top. When the gas & liquid come in contact with each other, liquid may absorb the gas or it may react with gas.
With this gas transfers to liquid and clean air is let out. Base on gas scrubbing liquid can be water or alkaline solution like NaOH or Na2CO3. Since the gases are corrosive in nature material of construction is PP FRP, PVC FRP or only FRP.
Once the capacity of the system is decided, then size of the scrubber, packing height, flow rate of scrubbing liquid are decided. Efficiency of system generally vary from 90% to 99%.