公开(公告)号：US06290812B1

公开(公告)日：2001-09-18

申请号：US09652781

申请日：2000-08-31

申请人： Christos Rampotas ,  Viveka Svensson ,  Jonny Hansson ,  Margareta Nilsson

发明人： Christos Rampotas ,  Viveka Svensson ,  Jonny Hansson ,  Margareta Nilsson

IPC分类号： D21C1100

CPC分类号： D21C11/0078 ,  D21C11/0028 ,  Y10S162/08 ,  Y10S210/912 ,  Y10S210/928

摘要： A method treats process water containing metal ions, in connection with bleaching of lignocellulosic pulp. The method is characterized by the steps of a) adjusting the Mg2+ content of the process water to form a flocculating base for metals and an organic substance; b) supplying a carbonate source to the process water to precipiate calcium as calcium carbonate; c) increasing the pH of the process water by adding white liquor to precipipate metals such as metal hydroxides; d) adding a flocculating agent to the process water; and e) separating the precipitated, flocculated metal compounds from the process water by flotation.

摘要翻译： 一种处理含有金属离子的工艺水，与木质纤维素纸浆的漂白有关。 该方法的特征在于以下步骤：a）调节工艺水的Mg2 +含量，形成金属和有机物质的絮凝碱; b）向工艺水中提供碳酸盐源以使碳酸钙沉淀; c）通过向析出的金属如金属氢氧化物中加入白液来提高工艺水的pH值; d）向工艺水中加入絮凝剂; 和e）通过浮选将沉淀的，絮凝的金属化合物与工艺用水分离。

公开(公告)号：US06425975B1

公开(公告)日：2002-07-30

申请号：US09743635

申请日：2001-03-14

申请人： Liisa Viikari ,  Annikka Mustranta ,  Leena Fagernäs

发明人： Liisa Viikari ,  Annikka Mustranta ,  Leena Fagernäs

IPC分类号： D21C1100

CPC分类号： D21C11/0021 ,  C02F3/342 ,  C02F11/12 ,  C02F2103/28 ,  D21C3/22

摘要： The invention relates to a process for enhancing the concentration of the fiber derived dissolved and colloidal substances in process water that comes from mechanical pulping. According to the invention, process water is treated with enzyme preparations that have an effect on carbohydrates and that contain mannanase and/or endoglucanase, in particular, which break down the soluble carbohydrate polymers contained by the process water into low molecular weight oligosaccharides. The treatment prevents an increase in viscosity so that process water can be concentrated into a high dry content, or the treatment can be used to lower the viscosity of previously concentrated process water to facilitate after-treatment.

摘要翻译： 本发明涉及一种提高来自机械制浆的工艺水中纤维衍生的溶解和胶态物质浓度的方法。 根据本发明，处理水用对碳水化合物具有影响并且含有甘露聚糖酶和/或内切葡聚糖酶的酶制剂进行处理，特别是将工艺水中含有的可溶性碳水化合物聚合物分解成低分子量寡糖。 该处理防止粘度增加，使得工艺水可以浓缩成高的干燥含量，或者可以使用处理来降低先前浓缩的工艺水的粘度以便于后处理。

公开(公告)号：US06183598B2

公开(公告)日：2001-02-06

申请号：US09164478

申请日：1998-10-01

申请人： Bertel Myreen

发明人： Bertel Myreen

IPC分类号： D21C1100

CPC分类号： D21C11/06 ,  D21C11/04 ,  D21C11/106 ,  D21C11/12 ,  Y02P40/44 ,  Y02P70/24

摘要： The invention relates to a process for recovering alkali and heat from a black liquor (5) containing silicate from a soda cook of e.g. grass, reed, straw and bagasse. In the process the black liquor (5) is treated with a gas (6) containing carbon dioxide to precipitate silica and lignin, the precipitate (9) is separated (2) from the black liquor, which is evaporated (3) and burnt (4) to generate heat and to recover a sodium carbonate melt. In the invention the black liquor (5) containing silicate is neutralised with a surplus of the gas (6) containing carbon dioxide, which preferably contains over 60% by volume of carbon dioxide. The evaporation (3) of black liquor mainly takes place after the precipitate (9) rich in silica has been separated (2). The combustion is performed with pure oxygen gas or oxygen-enriched air (14), after the black liquor has been brought to a temperature near its boiling point by direct contact with the hot exhaust gases from combustion, all these operations under a substantial over-pressure of at least 100 kPa. With this procedure, a sodium carbonate melt is recovered and a gas (17) containing over 60% by volume of carbon dioxide is formed, which is used to neutralise the black liquor (5) containing silicate.

摘要翻译： 本发明涉及一种从含有硅酸钠的黑液（5）中回收碱和热的方法，该方法是从例如苏打锅的苏打锅中回收。 草，芦苇，稻草和甘蔗渣。 在此过程中，用含有二氧化碳的气体（6）处理黑液（5）以沉淀二氧化硅和木质素，将沉淀物（9）与蒸发（3）和燃烧的黑液（2）分离（2） 4）产生热量并回收碳酸钠熔体。 在本发明中，含有硅酸盐的黑液（5）用含有二氧化碳的多余气体（6）中和，二氧化碳优选含有超过60体积％的二氧化碳。 黑液的蒸发（3）主要发生在富含二氧化硅的沉淀物（9）分离后（2）。 用纯氧气或富氧空气（14）进行燃烧，在黑液通过与来自燃烧的热废气直接接触使黑液达到接近沸点的温度之后进行燃烧， 至少100 kPa的压力。 通过该方法，回收碳酸钠熔体，形成含有超过60体积％二氧化碳的气体（17），其用于中和含有硅酸盐的黑液（5）。

公开(公告)号：US06540871B1

公开(公告)日：2003-04-01

申请号：US09467902

申请日：1999-12-21

申请人： Robert Rumph

发明人： Robert Rumph

IPC分类号： D21C1100

CPC分类号： D21C11/0007 ,  B01F7/02 ,  B01F13/0035 ,  B01F15/00883 ,  Y10S162/09

摘要： An apparatus and method are provided to reduce the size of solid clumps of material and thereby permit reuse of the material. In particular, the apparatus and method allow for reuse of sediment accumulated in a storage area for paper pulping byproducts. The sediment is conveyed from the storage area to an tank. In the tank, the sediment is agitated to produce reduced-size clumps of the sediment. The reduced-size clumps are in a slurry that is capable of being burned at least one of a facility that produces paper pulp and a facility that produces paper products.

摘要翻译： 提供了一种减小材料的固体块的尺寸并由此允许材料再利用的装置和方法。 特别地，该装置和方法允许重复利用积累在纸制造副产品的存储区域中的沉积物。 沉淀物从储存区域运送到储罐。 在坦克中，沉积物被搅动以产生沉淀物的较小尺寸的团块。 减小尺寸的团块是能够被燃烧至少一个生产纸浆的设施和生产纸制品的设备的浆料。

公开(公告)号：US06425974B1

公开(公告)日：2002-07-30

申请号：US09380335

申请日：1999-11-08

申请人： Patrick Bryant ,  Jiri Basta

发明人： Patrick Bryant ,  Jiri Basta

IPC分类号： D21C1100

CPC分类号： D21C11/0028 ,  C02F1/44 ,  C02F1/442 ,  C02F1/444 ,  C02F11/121 ,  C02F2103/28 ,  Y10S162/08

摘要： The process according to the present invention relates to the treatment of wastewater discharged from a bleach plant and more particularly treatment of bleach plant alkaline wash filtrate from treatment-steps and/or delignification/bleaching-steps of pulp. Further improvements of known processes are needed for solving the problems associated with the recovery of alkaline filtrates into the chemical recovery system. According to the process of the present invention, alkaline wash filtrate from treatment-steps and/or delignification/bleaching-steps of pulp is treated in a process by the following steps: i) treating at least a part of the alkaline filtrate in order to produce an alkaline concentrate enriched in high molecular weight dissolved organic compounds and a stream depleted in organic compounds, where the share of the alkaline concentrate to the total amount of the alkaline filtrate corresponds to a volume reduction factor (VRP) in the range of from about 2.0 up to about 7.5; ii) withdrawing the depleted stream; iii) collecting at least a part of the alkaline concentrate from step i) and using the concentrate as wash or dilution water in brownstock washing fiberline with a dilution factor of up to about 4.0, where at least a part of the washing filtrate is brought to the chemical recovery system.

摘要翻译： 根据本发明的方法涉及从漂白设备排出的废水的处理，更具体地说是处理步骤和/或纸浆的脱木素/漂白步骤处理漂白剂碱性洗涤滤液。 需要进一步改进已知的方法来解决与将碱性滤液回收到化学品回收系统中相关的问题。 根据本发明的方法，通过以下步骤处理来自处理步骤和/或脱木素/漂白步骤的纸浆的碱洗涤滤液：i）处理至少一部分碱性滤液以便 产生富含高分子量溶解的有机化合物的碱性浓缩物和贫的有机化合物的流，其中碱性浓缩物与碱性滤液的总量相当于体积减少因子（VRP）在约 2.0至7.5; ii）撤回耗尽的流; iii）收集来自步骤i）的至少一部分碱性浓缩物，并将稀释浓度用作洗涤或稀释水作为洗涤或稀释水，稀释倍数高达约4.0，其中至少一部分洗涤滤液被带到 化学品回收系统。

公开(公告)号：US06348128B1

公开(公告)日：2002-02-19

申请号：US09275577

申请日：1999-03-24

申请人： Honghi N. Tran ,  Charles M. Bair ,  Robert B. McBroom

发明人： Honghi N. Tran ,  Charles M. Bair ,  Robert B. McBroom

IPC分类号： D21C1100

CPC分类号： D21C3/02 ,  D21C11/0078 ,  Y02P40/44

摘要： A method is provided for improving causticizing efficiency in the conventional lime recausticization portion of an alkaline pulping process. Such processes are commonly used in the pulping and bleaching of wood and non-wood cellulose fiber materials. The method of this invention comprises reacting an aqueous solution of sodium carbonate with lime to produce sodium hydroxide (causticization) in the presence of borate in order to improve the causticization reaction efficiency. Borate is added in an amount sufficient to provide a boron to sodium (B/Na) molar ratio in the range of between about 0.001:1 and 0.4:1, and preferably in the range of between about 0.01:1 and 0.3:1, which results in an increased causticization efficiency of up to 8% over the reaction efficiency obtained in the absence of borate.

摘要翻译： 提供了一种用于提高碱性制浆工艺的常规石灰再生部分中的苛化效率的方法。 这种方法通常用于木材和非木质纤维素纤维材料的制浆和漂白。 本发明的方法包括在硼酸盐存在下使碳酸钠水溶液与石灰反应以产生氢氧化钠（苛性碱化），以提高苛化反应效率。 硼酸盐的添加量足以提供硼/钠（B / Na）摩尔比在约0.001:1和0.4:1之间，优选在约0.01:1至0.3:1之间的范围内， 这导致比在不存在硼酸盐时获得的反应效率高8％的苛化效率。

公开(公告)号：US06514379B1

公开(公告)日：2003-02-04

申请号：US09706168

申请日：2000-11-03

申请人： Rainer Gartz ,  Sakari Kaijaluoto ,  Kari Kokkonen

发明人： Rainer Gartz ,  Sakari Kaijaluoto ,  Kari Kokkonen

IPC分类号： D21C1100

CPC分类号： D21F1/66 ,  D21C11/0021 ,  Y10S210/928

摘要： A procedure for arranging water circulations in an integrated paper mill, the paper making process of which having three partly separate process phases concerning the water circulations (I, II, III). In the first phase, the fiber raw material is pretreated, defibered and cleaned for producing mechanical, chemi-mechanical and recycled pulp, in the second phase the pulp is treated further for improving the quality, and in the third phase it is made into paper or board. The circulation waters of the first process phase are concentrated by circulating the filtrates of the concentration and pressing phases counter-current inside the water circulation (I), and the circulation water thus concentrated is conducted into an effluent evaporation plant to be concentrated and then burnt in a combustion boiler. The water quantity discharged from the water circulation (I) of the first process phase is replaced by conducting such circulation waters of the paper mill into the front dilution of the press.

摘要翻译： 一种用于在综合造纸厂中布置水循环的程序，其制纸过程具有关于水循环（I，II，III）的三个部分分离的处理阶段。 在第一阶段，纤维原料经过预处理，去纤维化和清洁，用于生产机械，化学机械和再生纸浆，在第二阶段，纸浆进一步处理以提高质量，在第三阶段将其制成纸 或板。 通过在水循环（I）内循环浓缩和加压相的滤液，将第一加工阶段的循环水循环，将浓缩的循环水进入流出物蒸发装置中进行浓缩，然后燃烧 在燃烧锅炉。 从第一工艺阶段的水循环（I）排出的水量被造纸厂的这种循环水引入压机的前面稀释液中。

公开(公告)号：US06503369B2

公开(公告)日：2003-01-07

申请号：US09969616

申请日：2001-10-03

申请人： Pasi P. Rousu ,  Päivi P. Rousu ,  Esa J. Rousu

发明人： Pasi P. Rousu ,  Päivi P. Rousu ,  Esa J. Rousu

IPC分类号： D21C1100

CPC分类号： D21C11/0028 ,  C05D1/00 ,  D21C9/1063 ,  D21C11/0007

摘要： The invention relates to a process for producing cellulose and a fertilizer by-product by using a closed cycle of cooking chemicals and process waters. In the process of the invention, the pulp is bleached by at least partly using potassium hydroxide as a bleaching chemical. Thus, a bleach concentrate rich in potassium is obtained from the bleach filtrate, which bleach concentrate is combined with ashes obtained from the burning of lignin and other organic matter recovered from pulp production as a by-product, in order to be used as a potash fertilizer. The bleach-concentrate can also be used as a potash fertilizer as such. The invention also relates to a potash fertilizer obtained this way.

摘要翻译： 本发明涉及通过使用烹饪化学品和处理水的封闭循环来生产纤维素和副产物的方法。 在本发明的方法中，纸浆通过至少部分地使用氢氧化钾作为漂白化学品漂白。 因此，从漂白滤液中获得富含钾的漂白浓缩物，漂白浓缩物与作为副产物从纸浆生产回收的木质素和其它有机物质的燃烧中获得的灰分相结合，以便用作钾盐 肥料。 漂白剂也可以作为钾肥使用。 本发明还涉及以这种方式获得的钾肥。

公开(公告)号：US06176971B1

公开(公告)日：2001-01-23

申请号：US09195444

申请日：1998-11-18

申请人： Ella Sun Yu ,  C. Bertil Stromberg ,  Rolf C. Ryham ,  R. Fred Chasse

发明人： Ella Sun Yu ,  C. Bertil Stromberg ,  Rolf C. Ryham ,  R. Fred Chasse

IPC分类号： D21C1100

CPC分类号： D21C11/00 ,  D21C1/02 ,  D21C3/22 ,  D21C7/10

摘要： Useable steam, e.g. substantially clean useable steam, is produced from a chemical cellulose pulping system hot spent treatment liquor (e.g. black liquor) with optimum energy efficiency by passing the spent liquor to a reboiler, and then pressurizing (e.g. with an eductor, fan, or compressor) the clean steam discharged from the reboiler. The clean steam can be used to steam incoming chips (e.g. in a chip bin) without significantly increasing the TRS load on the pulp mill NCG system.

摘要翻译： 可用的蒸汽，例如 基本上可清洁的可用蒸汽，通过将废液通过再沸器，然后加压（例如用喷射器，风扇或压缩机）从具有最佳能量效率的化学纤维素制浆系统热废水处理液（例如黑液）生产， 从再沸器排出的清洁蒸汽。 清洁的蒸汽可用于蒸汽进入的碎片（例如在切屑仓中），而不会显着增加纸浆机NCG系统上的TRS负荷。

公开(公告)号：US06821384B1

公开(公告)日：2004-11-23

申请号：US09958326

申请日：2001-10-09

申请人： Reijo Seppänen

发明人： Reijo Seppänen

IPC分类号： D21C1100

CPC分类号： D21C11/066 ,  Y10S210/928

摘要： The invention relates to a process for the treatment of fly ash accumulating in the electro-filter of the soda recovery unit in a sulfate cellulose mill, the ash containing primarily Na sulfate, Na chloride, Na carbonate and K sulfate, to produce industrial raw materials, in which process the fly ash is dissolved in water, the carbonate present therein is broken down with hydrochloric acid to Na chloride, a sulfate precipitation chemical in chloride form is added, the sulfate precipitate obtained is separated from the solution, and the chloride-containing solution is recovered.

摘要翻译： 本发明涉及一种在硫酸纤维素磨机中处理积聚在苏打回收装置的电动过滤器中的粉煤灰的方法，该灰分主要包含硫酸钠，氯化钠，碳酸钠和硫酸钾，以生产工业原料 在该方法中，将粉煤灰溶解在水中，将其中存在的碳酸盐用盐酸分解成氯化钠，加入氯化物形式的硫酸盐沉淀化学品，将所得硫酸盐沉淀物与溶液分离， 回收含有溶液。