| 摘要 |
<p>A filtering device suitable for use in, for example, the papermaking industry has a generally-horizontal circular screen (7) onto which the liquid to be filtered flows from a tank (l) around the periphery of the screen. Solids filtered out of the liquid remain on the screen and are moved by a shower (l8) to an outlet (6) at the centre of the screen. The shower (l8) comprises several horizontal spray bars which extend radially across the screen and rotate about an axis at the centre of the screen. Each bar has a set of nozzles (l9), the locations of which are staggered with respect to the nozzle locations on the other bars. This ensures that the impact areas of one set of nozzles (l9) on the screen (7) do not follow the same paths over the screen as the preceding set of nozzles so that a more even coverage of the screen by the shower (l8) is achieved.</p> |
