公开(公告)号：WO2008152189A3

公开(公告)日：2009-03-05

申请号：PCT/FI2008000070

申请日：2008-06-13

Applicant: ANDRITZ OY ,  VEHMAA JANNE ,  PIKKA OLAVI ,  TERVOLA PEKKA

Inventor： VEHMAA JANNE ,  PIKKA OLAVI ,  TERVOLA PEKKA

IPC: D21C11/00

CPC classification number: D21C11/0064 ,  D21C9/02 ,  D21C9/14 ,  D21C11/0021

Abstract: The invention relates to a method of treating liquid flows at a chemical pulp mill comprising at least an alkaline cooking process utilizing cooking liquor for producing pulp, brown stock treatment with essentially closed liquid cycles, a pulp bleaching plant using ECF-bleaching wherein chloride- containing effluents are generated, a chemical recovery plant comprising a causticizing plant and chemical recovery boiler plant, and effluent purification. A characteristic feature of the method is that chloride-containing effluents of the bleaching plant are introduced to the effluent purification where they are treated for decreasing the organic matter content thereof, at least 20 % of the purified effluent is led back to a pulp mill process, purified effluent is used in at least one stage of causticizing as raw water source so that the chloride-containing liquid formed in the process stage is a weak white liquor fraction that is led to the recovery boiler plant as a smelt dissolving liquid component and therefrom further via regeneration of cooking liquor, pulp cooking and pulp washing as a waste liquor component to evaporation, wherefrom the concentrated waste liquor is led for treatment into a recovery boiler process, wherein a separation process for chlorides is arranged in order to control the chloride-level of the liquor cycle.

Abstract translation: 本发明涉及一种在化学纸浆厂处理液体流动的方法，该方法至少包括利用用于生产纸浆的蒸煮液，基本上封闭的液体循环的褐色处理的碱性烹饪方法，使用ECF漂白的纸浆漂白设备，其中含氯化物 产生污水，包括苛化厂和化学回收锅炉厂的化学回收设备，以及污水净化。 该方法的特征在于将漂白设备的含氯化物的废水引入流出物净化处理，以减少其有机物含量，将至少20％的纯化流出物引回到纸浆厂过程 纯化出的流出液用于至少一个苛化阶段的原水源，使得在工艺阶段中形成的含氯化物液体是弱的白液馏分，作为熔融溶解液体成分导入回收锅炉设备 进一步通过烹饪液的再生，纸浆蒸煮和作为废液组分的纸浆清洗进行蒸发，由此将浓缩的废液引入用于处理的回收锅炉方法中，其中布置氯化物的分离过程以控制氯化物 - 白酒循环水平。

公开(公告)号：WO2008152189A2

公开(公告)日：2008-12-18

申请号：PCT/FI2008/000070

申请日：2008-06-13

Applicant: ANDRITZ OY ,  VEHMAA, Janne ,  PIKKA, Olavi ,  TERVOLA, Pekka

Inventor： VEHMAA, Janne ,  PIKKA, Olavi ,  TERVOLA, Pekka

IPC: D21C9/14

CPC classification number: D21C11/0064 ,  D21C9/02 ,  D21C9/14 ,  D21C11/0021

Abstract: The invention relates to a method of treating liquid flows at a chemical pulp mill comprising at least an alkaline cooking process utilizing cooking liquor for producing pulp, brown stock treatment with essentially closed liquid cycles, a pulp bleaching plant using ECF-bleaching wherein chloride- containing effluents are generated, a chemical recovery plant comprising a causticizing plant and chemical recovery boiler plant, and effluent purification. A characteristic feature of the method is that chloride-containing effluents of the bleaching plant are introduced to the effluent purification where they are treated for decreasing the organic matter content thereof, at least 20 % of the purified effluent is led back to a pulp mill process, purified effluent is used in at least one stage of causticizing as raw water source so that the chloride-containing liquid formed in the process stage is a weak white liquor fraction that is led to the recovery boiler plant as a smelt dissolving liquid component and therefrom further via regeneration of cooking liquor, pulp cooking and pulp washing as a waste liquor component to evaporation, wherefrom the concentrated waste liquor is led for treatment into a recovery boiler process, wherein a separation process for chlorides is arranged in order to control the chloride-level of the liquor cycle.

Abstract translation: 本发明涉及一种在化学纸浆厂处理液体流动的方法，该方法至少包括利用用于生产纸浆的蒸煮液，基本上封闭的液体循环的褐色处理的碱性烹饪方法，使用ECF漂白的纸浆漂白设备，其中含氯化物 产生污水，包括苛化厂和化学回收锅炉厂的化学回收设备，以及污水净化。 该方法的特征在于将漂白设备的含氯化物的废水引入流出物净化处理，以减少其有机物含量，将至少20％的纯化流出物引回到纸浆厂过程 纯化出的流出液用于至少一个苛化阶段的原水源，使得在工艺阶段中形成的含氯化物液体是弱的白液馏分，作为熔融溶解液体成分导入回收锅炉设备 进一步通过烹饪液的再生，纸浆蒸煮和作为废液组分的纸浆清洗进行蒸发，由此将浓缩的废液引入用于处理的回收锅炉方法中，其中布置氯化物的分离过程以控制氯化物 - 白酒循环水平。

公开(公告)号：WO2008152188A3

公开(公告)日：2008-12-18

申请号：PCT/FI2008/000069

申请日：2008-06-13

Applicant: ANDRITZ OY ,  VEHMAA, Janne ,  PIKKA, Olavi ,  TERVOLA, Pekka

Inventor： VEHMAA, Janne ,  PIKKA, Olavi ,  TERVOLA, Pekka

IPC: D21C9/14 ,  D21C11/00

Abstract: The present invention relates to a method for treating pulp at a chemical pulping plant comprising at least a pulp bleaching plant using elementary chlorine free bleaching and having at least one chlorine dioxide stage, and wherein chloride-containing effluents are formed, a chemical recovery plant comprising a black liquor evaporation plant and a chemical recovery boiler plant, and effluent purification. An object of the present invention is to offer a method for utilizing liquid flows generated at a chemical pulp mill in an advantageous objet and for efficiently circulating them and minimizing the emissions from the mill. A characteristic feature of the method is that chloride-containing bleaching plant effluents are led to effluent purification, where they are treated in order to decrease the organic matter content thereof, that purified effluent is led back to a chemical pulp mill process, so that at least 20 % of the liquid used for brown stock washing is purified effluent and that condensates originating from the evaporation plant are used in the amount of at least 1 m 3 /adt pulp as washing or dilution water of the bleaching for reducing the total amount of effluent, and that a separation process for chlorides is arranged at the chemical recovery boiler plant for decreasing the chloride level of the chemical cycle.

公开(公告)号：WO1997000998A1

公开(公告)日：1997-01-09

申请号：PCT/FI1996000353

申请日：1996-06-14

Applicant: AHLSTROM MACHINERY OY ,  HENRICSON, Kaj ,  PIKKA, Olavi

Inventor： AHLSTROM MACHINERY OY

IPC: D21C09/10

CPC classification number: D21C9/1057 ,  D21C3/24 ,  D21C7/08 ,  D21C9/007 ,  D21C9/10 ,  D21C9/1005 ,  D21C9/1042 ,  F28D7/0041 ,  F28D7/106 ,  F28F1/40 ,  F28F13/06

Abstract: The present invention relates to a method of treating pulp and an apparatus applying the method. The method and the apparatus according to the invention are especially suitable for the bleaching of medium consistency pulp when bleaching stages of various temperatures are used. It is characteristic of the invention to treat pulp in connection with chemical pulp manufacturing process in such a manner that pulp is allowed to flow prior to the bleaching reactor, in the reactor itself, and/or thereafter at a rate of less than 5 m/s through an indirect heat exchanger, for changing the pulp temperature over 5 DEG C, preferably over 10 DEG C.

Abstract translation: 本发明涉及一种处理纸浆的方法和一种应用该方法的装置。 根据本发明的方法和装置特别适合于在使用各种温度的漂白阶段时中等稠度纸浆的漂白。 本发明的特征在于，以化学纸浆制造方法处理纸浆，使纸浆在漂白反应器之前，反应器本身和/或之后以小于5m / 通过间接热交换器，用于将纸浆温度改变超过5℃，优选超过10℃。

公开(公告)号：WO1990010110A1

公开(公告)日：1990-09-07

申请号：PCT/FI1990000056

申请日：1990-02-28

Applicant: A. AHLSTROM CORPORATION ,  HENRICSON, Kaj ,  MÄKELÄ, Mika ,  PIKKA, Olavi

Inventor： A. AHLSTROM CORPORATION

IPC: D21C09/18

CPC classification number: D21D5/16 ,  D21C9/18 ,  D21F1/74

Abstract: The present invention relates to a method and apparatus, the purpose of which is to separate more efficiently than hitherto liquid from liquid/fiber suspension by dividing the suspension into two portions, of which one includes mainly liquid and the other both fibers and liquid. The method and apparatus in accordance with the invention may especially well be applied to the thickening of low consistency (0.5 - 5 %) fiber suspensions in pulp and paper industry. The thickening method in accordance with the invention is characterized in that micro turbulence is generated on the filter surface by means of the filter surface, by which thickened fiber matting on the surface is dispersed or the generation thereof is prevented. The thickening apparatus in accordance with the present invention is again characterized in that unevennesses (24) are arranged on the filter surface (23), which together with the kinetic speed of the fiber suspension generate micro turbulence of high intensity, by which the fiber matting tending to form in close proximity to the filter surface (23) is dispersed to optimize the thickening process.

Abstract translation: 本发明涉及一种方法和装置，其目的是通过将悬浮液分成两部分，其中一部分主要包括液体，另一个包括纤维和液体，从而更有效地分离液体/纤维悬浮液中的液体。 根据本发明的方法和设备可以特别适用于纸浆和造纸工业中低稠度（0.5-5％）纤维悬浮液的增稠。 根据本发明的增稠方法的特征在于，通过过滤表面在过滤器表面上产生微湍流，通过该过滤器表面分散表面上的增厚的纤维毡或防止其产生。 根据本发明的增稠装置的特征还在于，在过滤器表面（23）上布置有不平坦度（24），其与纤维悬浮液的动力学速度一起产生高强度的微湍流，纤维垫 倾向于形成靠近过滤器表面（23）的方式被分散以优化增稠过程。

公开(公告)号：WO2008152187A2

公开(公告)日：2008-12-18

申请号：PCT/FI2008000068

申请日：2008-06-13

Applicant: ANDRITZ OY ,  VEHMAA JANNE ,  PIKKA OLAVI ,  TERVOLA PEKKA

Inventor： VEHMAA JANNE ,  PIKKA OLAVI ,  TERVOLA PEKKA

IPC: D21C9/14

CPC classification number: D21C11/0028 ,  D21C3/02 ,  D21C9/02 ,  D21C9/10 ,  D21C9/12 ,  D21C9/14 ,  D21C11/0021

Abstract: The present invention relates to a method for treating liquid flows at a chemical pulp mill comprising at least an alkaline cooking process for producing pulp, brown stock treatment with essentially closed liquid cycles, a pulp bleaching plant using ECF-bleaching, a chemical recovery plant comprising a chemical recovery boiler, and effluent purification. Chloride-containing bleaching plant effluents are led to the effluent purification, where they are treated in order to decrease the organic matter content thereof. At least 20 % of the purified effluent is returned to a pulp mill process and purified effluent is used in a last washing stage included in brown stock treatment. In the brown stock treatment the liquid flow is passed counter-currently to evaporation, wherefrom it is led for treatment to a recovery boiler process, wherein a separation process for chlorides is arranged for controlling the chloride level of the liquor cycle.

Abstract translation: 本发明涉及一种在化学纸浆厂处理液体流动的方法，该方法至少包括用于生产纸浆的碱性烹饪方法，基本上封闭的液体循环的褐色处理，使用ECF漂白的纸浆漂白设备，包括 化学回收锅炉和污水净化。 将含氯化物漂白设备的废水导入废水净化处理处理，以降低其有机物含量。 将至少20％的纯化流出物返回到纸浆厂工艺，并且纯化的流出物用于棕色原料处理中包括的最后洗涤阶段。 在棕色储备处理中，液体流动相对于蒸发通过，从那里被引导用于处理回收锅炉过程，其中布置氯化物的分离过程以控制液体循环的氯化物水平。

公开(公告)号：WO2005001196A1

公开(公告)日：2005-01-06

申请号：PCT/FI2004/000373

申请日：2004-06-17

Applicant: ANDRITZ OY ,  HENRICSON, Kaj ,  PIKKA, Olavi ,  TERVOLA, Pekka

Inventor： HENRICSON, Kaj ,  PIKKA, Olavi ,  TERVOLA, Pekka

IPC: D21C9/02

CPC classification number: D21C9/14 ,  D21C9/02 ,  D21C9/08 ,  D21C9/153

Abstract: The present invention relates to a method of treating pulp in connection with the bleaching of chemical pulp, said method comprising treating of the pulp in at least an ozone, chlorine dioxide or alkali phase and thereafter washing of the pulp in a washing device having an E 10 value of at least 3, whereby washing liquid is introduced into the washing device countercurrently in relation to the pulp and filtrate is discharged from the washing device. At first the pulp is washed in the washing device so that the washing liquid is filtrate ob­tained from the washing device itself and the amount of thus circulated washing liquid is 1.5 - 3.5 t/adt pulp, whereafter the pulp is washed with liquid introduced from outside the washing de­vice, the amount of said liquid being such that the dilution factor in the latter wash is less than 1 t/adt and that the total amount of washing liquid used in the washing device is such that the dilu­tion factor is more than 0 t/adt.

Abstract translation: 本发明涉及一种处理与化学纸浆漂白相关的纸浆的方法，所述方法包括至少在臭氧，二氧化氯或碱相中处理纸浆，然后在具有E10的洗涤装置中清洗纸浆 值至少为3，由此洗涤液相对于纸浆逆流地引入洗涤装置中，滤液从洗涤装置排出。 首先在洗涤装置中洗涤纸浆，使得洗涤液体是从洗涤装置本身获得的滤液，并且这样循环的洗涤液体的量为1.5-3.5吨/重量浆，然后用从外部引入的液体洗涤纸浆 洗涤装置，所述液体的量使得后一次洗涤中的稀释因子小于1t / adt，并且洗涤装置中使用的洗涤液的总量使得稀释因子大于0t / ADT。

公开(公告)号：WO1996009434A1

公开(公告)日：1996-03-28

申请号：PCT/FI1995000506

申请日：1995-09-18

Applicant: A. AHLSTROM CORPORATION ,  HENRICSON, Kaj ,  PIKKA, Olavi

Inventor： A. AHLSTROM CORPORATION

IPC: D21C09/16

CPC classification number: D21C9/16 ,  D21C9/1057 ,  D21C9/147

Abstract: The present invention relates to a method of bleaching sulfate cellulose pulp to a brightness of at least ISO 85 by using at least two of the following bleaching chemicals: oxygen, ozone, and peroxide. Characteristic features of the invention are that the pulp is digested; subjected to a heavy metals removal treatment with at least one of the following treatment agents or methods: acidification, EDTA, and DTPA; delignified in a pressurized two-step oxygen stage; and bleached at least in one acid peroxide stage.

Abstract translation: 本发明涉及通过使用至少两种以下漂白化学品：氧，臭氧和过氧化物，将硫酸纤维素纸浆漂白至至少ISO 85的亮度的方法。 本发明的特征是纸浆被消化; 用至少一种下列处理剂或方法进行重金属去除处理：酸化，EDTA和DTPA; 在加压两步氧阶段脱木质素; 并至少在一个过氧化氢阶段漂白。

公开(公告)号：WO2011064447A1

公开(公告)日：2011-06-03

申请号：PCT/FI2010/050943

申请日：2010-11-22

Applicant: ANDRITZ OY ,  VEHMAA, Janne ,  PIKKA, Olavi ,  TERVOLA, Pekka

Inventor： VEHMAA, Janne ,  PIKKA, Olavi ,  TERVOLA, Pekka

IPC: D21C11/00 ,  D21C9/10

CPC classification number: D21C11/00 ,  D21C3/02 ,  D21C9/02 ,  D21C9/083 ,  D21C9/1057 ,  D21C9/144

Abstract: The present invention relates to a method of treating and utilizing liquid flows at a chemical pulp mill. The method comprises at least the following stages: a) chemical pulp is produced in an alkaline cooking process, b) the brown stock generated in the cooking is treated, said treatment comprising washing of the stock and preferably oxygen delignification and subsequent washing of the stock, c) a bleaching process for the brown stock, the bleaching sequence comprising at least one stage using chlorine dioxide and additionally at least one oxidizing bleaching stage and having at least two washing stages for treating the stock with liquids and for producing filtrates, and d) filtrates from stage c) are purified at an effluent treatment plant of the chemical pulp mill, which comprises at least biological treatment, for obtaining purified effluent. The method further comprises a stage e), where the purified effluent with a color of 200 mg/l (R color) or more and a COD value of over 150 mg/l is used as pulp treatment liquid in stage c).

Abstract translation: 本发明涉及在化学纸浆厂处理和利用液体流动的方法。 该方法至少包括以下阶段：a）在碱性烹饪过程中产生化学纸浆，b）处理在烹饪中产生的棕色原料，所述处理包括洗涤原料，优选氧脱木素，随后洗涤原料 ，c）棕色原料的漂白方法，所述漂白顺序包括使用二氧化氯的至少一个阶段和另外至少一个氧化漂白阶段，并且具有至少两个洗涤阶段用于处理液体和生产滤液，以及d ）来自阶段c）的滤液在化学纸浆厂的流出物处理厂纯化，其至少包括生物处理，用于获得纯化的流出物。 该方法还包括阶段e），其中在阶段c）中使用颜色为200mg / l（R颜色）或更高，COD值超过150mg / l的净化流出物作为纸浆处理液。

公开(公告)号：WO2008152185A3

公开(公告)日：2008-12-18

申请号：PCT/FI2008/000063

申请日：2008-06-12

Applicant: ANDRITZ OY ,  VEHMAA, Janne ,  PIKKA, Olavi ,  TERVOLA, Pekka

Inventor： VEHMAA, Janne ,  PIKKA, Olavi ,  TERVOLA, Pekka

IPC: D21C9/02

Abstract: The present invention relates to a method in connection with washing of pulp at a chemical pulp mill comprising at least an alkaline cooking process utilizing cooking liquor for producing pulp, brown stock treatment with essentially closed liquid cycles, in which the last washing device is a washing device based on pressing of pulp, a press or a washing press, a pulp bleaching plant using ECF- bleaching, wherein chloride-containing effluents are formed, a chemical recovery plant and effluent purification. An object of the present invention is to offer a method for utilizing liquid flows generated at a chemical pulp mill in an advantageous object and for efficiently circulating them without disturbing the main process and minimizing the emissions from the mill. A characteristic feature of the invention is that purified effluent in the amount of at least 1 m3/adt pulp is introduced into the dilution after the press or washing press, whereby the effluent is passed from the dilution into the first process stage of the bleaching.