Separator foam scrubber

Wet foam scrubbers. In wet foam scrubbers, the gas streams through a gridded or perforated plate, on which the water is poured. At a certain stage in the operating regime, foam is formed and particles from the gas to be purified are retained on the surface of bubbles. The velocity of the gas stream through the perforated plate ranges from 0.5 to 2 m s . The separation limit is between 2 and 3 fim. The specific water consumption is... 

Operating instructions specified that 50% sodium hydroxide solution, sodium hypochlorite solution and sodium EDTA solution were to be added separately by pumping into an off-gas scrubber unit, when the exotherms would be dissipated slowly in the solution tank. An attempt to simplify the operation by premixing the 3 solutions in a drum before pumping the mixture, led to vigorous foaming decomposition. Mixing the cone, alkali with the bleach caused the oxidant to become heated by the heat of dilution of the former, and oxidation of the EDTA component then proceeded exothermically with decomposition (and evolution of carbon dioxide). 

Overall, horizontal vessels arc more economical for normal oil and gas separation, particularly where there may be problems with emulsions, foam or high gas-oil ratios. Vertical vessels work more effectively in either low or very high GOR applications, such as scrubbers. 

The wet mechanical scrubbers include simple shower, vortex, foam, inertial, stream and rotational separators. 

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