Circular Vibratory Screeners for Ash Processing

摘要

The JEA Northside Generating Station had two expensive crushers approaching the end of their service lives. JEA knew that replacing the aging crushers, a necessary component in the ash-processing system, would entail major capital cost. The crushers performed the essential service of preventing bed-ash particles larger than 3/16 in (7.6 cm) from entering the disposal process, since oversize particles would plug the pumps that move the ash slurry to a settling basin. The company wanted to find a way around the cost and operational limitations of the crushers while still ensuring that oversized particles were separated. While seeking replacement screener in the fly-ash line, it occurred to Jerry Kowalski, a structural engineer at JEA, that a circular vibratory screener might also be a good candidate for separating oversized particles in the bed-ash line, thus eliminating the crushers. Kowalski said the new screeners allow removal of oversized material continuously.