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    • 3. 发明申请
    • METHOD AND SYSTEM FOR REDUCING PHOSPHORUS IN EFFLUENT OR FILTRATE
    • 用于降低磷酸盐或过滤液中磷的方法和系统
    • WO2015150632A1
    • 2015-10-08
    • PCT/FI2015/050223
    • 2015-03-30
    • UPM-KYMMENE CORPORATION
    • RISTOLAINEN, MattiHASSINEN, EsaSAARELA, Sami
    • C02F1/52C02F1/66D21C11/00C02F103/28
    • C02F1/5236C02F1/001C02F1/66C02F2001/5218C02F2101/105C02F2103/28C02F2301/043D21C11/0028D21C11/0042D21C11/0085D21C11/02Y02P40/44
    • 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 by filtration 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.
    • 本发明涉及一种从流程或滤液中还原磷的方法,该方法包括至少一个条件为酸性的阶段,其中该方法包括以下步骤:a)从一个阶段获得流出物或滤液的第一部分 在哪些条件下是酸性的? b)从条件为酸性的相同或不同阶段获得流出物或滤液的第二部分; c)用碱性剂将流出物或滤液的第一部分的pH调节至碱性; d)使磷以磷酸盐的形式沉淀; e)通过过滤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组合。 该方法可以是一种化学制浆方法,其中在消化装置(1)中煮熟纸浆,在洗涤装置(2)中洗涤,在漂白装置(3)中漂白,其中发生酸性漂白阶段(3') 之后,在分离装置(4)中将纸浆从分离成流出物或滤液的第一部分和第二部分的酸性流出物或滤液中分离。 本发明还涉及相应的化学制浆和净化装置。
    • 4. 发明申请
    • A METHOD AND A SYSTEM FOR TREATING LIQUID FLOWS AT A CHEMICAL PULP MILL
    • 一种用于在化学造纸厂处理液体流动的方法和系统
    • WO2013135957A2
    • 2013-09-19
    • PCT/FI2013/050270
    • 2013-03-12
    • UPM-KYMMENE CORPORATION
    • SAARELA, SamiRISTOLAINEN, MattiRIMPINEN, OlliVIITIKKO, KatjaVARTIA, TuijaAGUERREBERE, Maria JoseFERNANDEZ, VirginiaHASSINEN, Esa
    • D21C11/00D21C3/00D21C9/10D21C11/0014D21C11/0021
    • The invention relates to a method for treating liquid flows at a chemical pulp mill. The system comprises a cooking process for producing pulp, at least one washing stage for washing said pulp, at least one bleaching stage for bleaching the washed pulp, a waste water treatment plant comprising at least one purifying stage to purify effluents, and a raw water treatment plant comprising at least one purifying stage, and the method comprises conveying a liquid flow comprising a portion of purified effluents (45) coming from the waste water treatment plant (40) and/or a portion of process waters (35) to said at least one purifying stage of the raw water treatment plant (20) for purifying the liquid flow in said at least one purifying unit of the raw water treatment plant (20) to obtain recyclable water (29), and using said recyclable water as process water in at least one process and/or process stage at the pulp mill. In addition, the invention relates a system for treating liquid flows at a chemical pulp mill and a use of a raw water treatment plant of a chemical pulp mill for purifying process waters and/or effluents coming from the waste water treatment plant.
    • 本发明涉及一种在化学纸浆厂处理液体流动的方法。 该系统包括用于生产纸浆的烹饪过程,用于清洗所述纸浆的至少一个清洗阶段,用于漂白经过清洗的纸浆的至少一个漂白阶段,包括至少一个纯化阶段以净化流出物的废水处理设备,以及生水 所述方法包括将包含来自所述废水处理装置(40)和/或一部分工艺用水(35)的一部分纯化流出物(45)的液体流输送至所述至少一个净化装置 (20)的至少一个净化阶段,用于净化原水处理设备(20)的所述至少一个净化单元中的液体流以获得可再循环的水(29),并且使用所述可再循环的水作为处理水 在纸浆厂的至少一个工艺和/或工艺阶段。 此外,本发明涉及一种用于处理化学纸浆厂中的液体流动的系统以及化学纸浆厂的原水处理厂用于净化来自废水处理厂的处理水和/或流出物的系统。