| 摘要 |
Apparatus for removing hydrogen fluoride, finely divided solids and hydrocarbons from aluminium production process emissions includes a vertical scrubbing chamber (50) of constant cross section for receiving the emissions, and an injector (62) disposed axially within the scrubbing chamber for injecting finely divided alumina particles radially into the emission stream. In order to reduce turbulence, the injector diverges from its upper end (53) and its lower end (54) to a wider midregion. Formed in its medregion is a plurality of perforations (56) for delivering alumina particles at a gravity flow and in bulk form horizontally into the gas emission stream moving vertically through the chamber. |
