Using magnesium hydroxide as the scrubbing medium, paper manufacturer Fort James Paper in Camus, Wash., has achieved no-detect levels of sulfur dioxide at the scrubbing outlet. SO2is a pollutant byproduct produced in various industrial processes.
The paper maker relied on the Rotabed scrubber, a prepackaged system from Bionomic Industries Inc., Mahwah, N.J. The equipment combines a stabilized Coriolis-induced swirling fluidized bed of scrubbing liquid and “packless” plug-resistant grid cross-section. The grid is 99 percent open to deliver high throughout capacity, which is four to six times greater than packed tower or tray scrubbers, according to Bionomic.
According to the manufacturer, unlike fluidized-bed scrubbers, which randomly “boil” and can cause momentary inconsistencies in the fluidized bed, the Rotabed uses induced rotation to stabilize the fluidized zone to achieve mass transfer. The scrubber also has been successful in controlling acrylic polymers, acrylic acids, hydrofluoric and hydrofluoric acids, and chlorine dioxide along with particulate over 10 micron dia, according to Bionomic.