A METHOD OF FILTERING SLUDGES
    7.
    发明申请
    A METHOD OF FILTERING SLUDGES 审中-公开
    一种滤波方法

    公开(公告)号:WO2014033370A1

    公开(公告)日:2014-03-06

    申请号:PCT/FI2013/050842

    申请日:2013-09-02

    Abstract: A method of filtering a sludge, which consists of solid material and a liquid phase. In the method, the sludge is fed to a filtering unit, such as a suction filter, with which the solid material is separated from the liquid. According to the present invention, the sludge is treated with foam in association with the filtering, for example by mixing a pre-prepared foam into the sludge or by spreading a foam layer onto the surface of the filtrate cake. By the present invention, it is possible to increase the filtering capacity and to reduce the residual moisture of the filtrate cake and the moisture variations in the filtrate cake. It is also possible to leave out thermal drying which is used to achieve the desired residual moisture. In addition, the amount of dissolved and colloidal substance in the filtrate is reduced.

    Abstract translation: 一种过滤由固体材料和液相组成的污泥的方法。 在该方法中,将污泥送入过滤单元,例如抽吸过滤器,固体物料与液体分离。 根据本发明,将污泥与过滤相结合地处理泡沫,例如通过将预先制备的泡沫混合到污泥中或通过将泡沫层铺展在滤饼的表面上。 通过本发明,可以提高过滤能力并减少滤饼的残留水分和滤饼中的水分变化。 也可以省略用于实现所需残留水分的热干燥。 此外,滤液中的溶解胶体物质的量减少。

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