Flue gas desulfurization apparatus

摘要

An apparatus is provided for removing sulfur oxides from a flue gas stream. That apparatus includes an absorber tower having an upper section and a lower section. A packed bed unit is provided in the upper section of the absorber tower. A first recycling circuit is provided for recycling lime water to the lower section of the absorber. Further the apparatus includes a second recycling circuit for recycling caustic solution to the packed bed unit.

主权项

1. An apparatus for removing sulfur oxides from a flue gas stream, comprising:
an absorber tower including a reaction chamber; a liquid collection tray dividing said reaction chamber into a lower section and an upper section; a packed bed unit in said upper section a first circuit for circulating a first solution through said lower section in a first direction, wherein the first solution is selected from a group of solutions consisting of limewater, a limestone slurry and combinations thereof; a second circuit for circulating a second solution through said upper section and said packed bed unit in said first direction, wherein said second solution is a caustic solution, wherein said second circuit further includes a slurry tank and a solids/wetcake separator; a flue gas inlet in communication with said lower section and a treated flue gas outlet in communication with said upper section whereby a flue gas stream passes in a second direction through said lower section past said liquid collection tray and then through said upper section including said packed bed unit.