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2. 发明申请

WO1994023821A1 METHOD AND APPARATUS FOR CLEANING A FILTER DRUM USED FOR THICKENING LIME MUD 审中-公开
标题翻译：用于清洁用于增稠泥浆的过滤器的方法和装置
公开(公告)号：WO1994023821A1
公开(公告)日：1994-10-27
申请号：PCT/FI1994000134
申请日：1994-04-07
申请人： A. AHLSTROM CORPORATION , KETOLAINEN, Vesa , RUOKOLAINEN, Pekka , TITOFF, Juha
发明人： A. AHLSTROM CORPORATION
IPC分类号： B01D33/073
CPC分类号： B01D37/02 , B01D33/073 , B01D33/463 , B01D33/466 , B01D33/60
摘要： 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.
摘要翻译：本发明涉及一种用于清洁用于增稠石灰泥的过滤鼓或气缸的方法和装置，其中过滤鼓石灰浆在形成在部分浸没在其中的过滤鼓的表面上的石灰泥过滤层上增厚含有石灰泥的大桶本发明的方法的特征在于，在从预涂层表面用刮刀除去石灰泥饼之前，将一块石灰泥从增稠的石灰泥浆层中以至少一种低的液体射流分离出来压力可沿鼓的纵向方向移动。本发明的装置的特征在于，在除去石灰泥饼之前，至少一个喷嘴（36,38）位于滚筒的旋转方向上，除了所述至少一个喷嘴（36,38），用于使预涂层变薄的喷嘴（34）。

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