| 摘要 |
<p>The present invention relates to a method and an apparatus for cleaning a filter drum or a cylinder used for thickening lime mud in which filter drum lime mud is thickened on a filtering layer of lime mud formed on the surface of a filter drum partially immersed in a vat containing lime mud. It is characteristic of the method of the invention that, before the lime mud cake is removed with a scraper from the surface of the precoat layer, a strip of lime mud is detached from the thickened lime mud layer with at least one liquid jet of low pressure movable in the longitudinal direction of the drum. It is characteristic of the apparatus of the invention that at least one nozzle (36, 38) is located in the rotational direction of the drum prior to the scraper removing lime mud cake and that the apparatus comprises, in addition to said at least one nozzle (36, 38), a jet nozzle (34) for making the precoat layer thinner.</p> |
