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2. 发明公开

EP3126296A1 METHOD AND SYSTEM FOR REDUCING PHOSPHORUS IN EFFLUENT OR FILTRATE 有权
标题翻译：用于还原流出物或过滤物中的磷的方法和系统
公开(公告)号：EP3126296A1
公开(公告)日：2017-02-08
申请号：EP15717529.0
申请日：2015-03-30
申请人： UPM-Kymmene Corporation
发明人： RISTOLAINEN, Matti , ELUEN, Ines , AGUERREBERE, Maria Jose
IPC分类号： C02F1/52 , C02F1/66 , D21C11/00 , C02F103/28
CPC分类号： C02F1/66 , C02F1/5236 , C02F2001/5218 , C02F2101/105 , C02F2103/28 , C02F2301/043 , D21C11/0028 , D21C11/0042 , D21C11/0085 , D21C11/02 , Y02P40/44
摘要： The invention relates to a method for reducing phosphorus in effluent or filtrate from a process which comprises at least one stage in which conditions are acidic, wherein the method comprises the steps of: a) obtaining a first portion of an effluent or filtrate from a stage in which conditions are acidic; b) obtaining a second portion of an effluent or filtrate from the same or different stage in which conditions are acidic; c) adjusting pH of the first portion of the effluent or filtrate to alkaline with an alkaline agent; d) allowing phosphorus to be precipitated in form of a phosphate salt; e) separating the precipitate to produce purified effluent or filtrate; and f) combining the purified effluent or filtrate with the second portion of the effluent or filtrate. The process may be a chemical pulping process in which pulp is cooked in a digestion apparatus (1), washed in a washing apparatus (2), bleached in a bleaching apparatus (3) in which an acidic bleaching stage (3') takes place, after which the pulp is separated in a separation apparatus (4) from an acidic effluent or filtrate which is divided into the first and second portions of effluent or filtrate. The invention also relates to the corresponding chemical pulping and purification apparatus.
摘要翻译：本发明涉及一种用于减少来自包括至少一个其中条件为酸性的阶段的方法的流出物或滤液中的磷的方法，其中所述方法包括以下步骤：a）从阶段获得第一部分流出物或滤液其中条件是酸性的; b）从条件为酸性的相同或不同阶段获得第二部分流出物或滤液; c）用碱性试剂将第一部分流出物或滤液的pH调节至碱性; d）使磷以磷酸盐的形式沉淀; e）分离沉淀物以产生纯化的流出物或滤液; 和f）将纯化的流出物或滤液与流出物或滤液的第二部分混合。该过程可以是化学制浆过程，其中纸浆在消化装置（1）中烹饪，在清洗装置（2）中清洗，在其中发生酸性漂白阶段（3'）的漂白装置（3）中漂白之后，将纸浆在分离装置（4）中与酸性流出物或滤液分离，所述酸性流出物或滤液分成流出物或滤液的第一部分和第二部分。本发明还涉及相应的化学制浆和净化装置。

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