SCRUBBER  ABSORBER        NEWSLETTER               

                                                                                      March  2001
                                                                                         No. 321

Paper Mill Checks Out Rotabed Scrubber 

Fort James Paper (soon to be Georgia-Pacific) in Camus, WA, recently completed the successful startup and testing of a Bionomic Industries' (Mahwah, NJ) patented ROTABED™ scrubber on an SO₂ scrubbing application.

Using magnesium hydroxide as the scrubbing media, the ROTABED scrubber achieved non-detect levels of SO₂ at the scrubber outlet, according to mill personnel. The scrubber uses a unique rotating fluidized bed of scrubbing liquid to contact the gas and liquid. The rotation is induced by special vanes and vortex finder incorporated into a deep conical, highly open grid. The coriolis effect helps spin the descending fluidized mixture thereby sustaining the rotation. Unlike fluidized bed scrubbers that randomly "boil" or ebulate causing momentary inconsistencies in the fluidized bed, the ROTABED uses the induced rotation to stabilize the fluidized zone and achieve superior mass transfer.

The scrubber has been successfully applied to control HF, HCl, soluble odors, ClO₂, Cl₂, and particulate over 10 microns aerodynamic diameter.

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