Electrofluidized bed in filtration of smoke emissions from asphaltic pavement recycling process

The electrofluidized bed (EFB), a device for high efficiency collection of submicron particles, was tested on the emissions from an asphalt recycling plant. The hydrocarbon pollutant was collected on sand, and removed from the bed in its fluidized state and added to the asphalt product. Efficiencies of collection in excess of 98% were reported for submicron particles in beds having unfluidized depths of 8-12 cm, when using sand with a mean diameter of 2 mm. The efb capital and operating costs were favorable compared with those of other devices serving this application. The efb, a promising contribution to the recycling of asphaltic highway, can use existing asphaltic processing equipment.