公开(公告)号：US20190177914A1

公开(公告)日：2019-06-13

申请号：US16323758

申请日：2017-08-17

申请人： Valmet Technologies Oy

发明人： Asta HUMALAJOKI ,  Antti VAELJAE ,  Heikki AIRIKKALA ,  Seppo TUOMINIEMI ,  Peter BJOERKLUND

IPC分类号： D21C11/06 ,  D21C11/00 ,  C01B17/80

CPC分类号： D21C11/06 ,  B01D5/003 ,  B01D5/0054 ,  B01D5/0075 ,  C01B17/60 ,  C01B17/803 ,  C01B17/806 ,  D21C11/0064 ,  D21C11/04

摘要： A system (100) for producing aqueous sulphuric acid. The system (100) comprises a first heat exchanger (410) configured to cool water and/or aqueous sulphuric for producing cooled water and/or cooled aqueous sulphuric acid; a pre-cooling unit (200) configured to pre-cool some gas containing sulphur trioxide, the pre-cooling unit (200) comprising an inlet or inlets (212, 214) for receiving [i] the gas containing sulphur trioxide and [ii] the cooled water and/or the cooled aqueous sulphuric acid, an outlet (216) for letting out aqueous sulphuric acid and the gas containing sulphur trioxide, and a first nozzle (220) for spraying the cooled water and/or the cooled aqueous sulphuric acid onto the gas containing sulphur trioxide to cool the gas containing sulphur trioxide. The system further comprises a condensation tower (300) comprising a first inlet (302) for receiving the cooled gas containing sulphur trioxide and aqueous sulphuric acid from the pre-cooling unit (200) and means (320) for circulating the aqueous sulphuric acid within the

公开(公告)号：US20150322104A1

公开(公告)日：2015-11-12

申请号：US14761525

申请日：2013-01-24

申请人： Panu TIKKA ,  VALMET AB

发明人： Panu Tikka

IPC分类号： C07G1/00

CPC分类号： C07G1/00 ,  D21C11/0007 ,  D21C11/0042 ,  D21C11/04

摘要： The method is for separation of lignin from original black liquor (BLIN) that has a first precipitation stage (PR) for precipitation of lignin by a first acidification using acidifier AC1, preferably using CO2, at alkaline conditions, then separating a lignin cake with subsequent suspension of the lignin cake in a strong acid in order to leach our metals from the lignin followed by dewatering and obtaining a clean lignin product LP. The process further is improved by intensified hydrolysis of lignin cake such that most of the carbohydrates are broken down to dissolvable monomers that could be separated from the lignin in the filtrate from a filtering stage subsequent to the hydrolysis. The improved hydrolysis could reduce as much as 90% of the carbohydrate content using a moderately increased temperature and increased charge of acidifier while avoiding any larger lignin yield losses.

摘要翻译： 该方法用于将木质素与原始黑液（BLIN）分离，其中第一沉淀阶段（PR）用于在碱性条件下使用酸化剂AC1（优选使用CO 2）进行第一次酸化沉淀木质素，然后分离木质素饼 将木质素饼块悬浮在强酸中以从木质素中浸出我们的金属，随后脱水并获得干净的木质素产物LP。 该方法进一步通过木质素饼的强化水解进一步改善，使得大多数碳水化合物被分解成可溶解的单体，其可以在水解后的过滤阶段从滤液中的木质素中分离出来。 改善的水解可以使用适度升高的温度和增加酸化剂的电荷来减少多达90％的碳水化合物含量，同时避免任何更大的木质素产率损失。

公开(公告)号：US20150119559A1

公开(公告)日：2015-04-30

申请号：US14385263

申请日：2012-03-16

申请人： Fredrik Ohman ,  Hans Theliander ,  Per Tomani ,  Peter Axegard

发明人： Fredrik Ohman ,  Hans Theliander ,  Per Tomani ,  Peter Axegard

IPC分类号： C07G1/00

CPC分类号： C07G1/00 ,  C08H6/00 ,  C08H8/00 ,  C08L2205/18 ,  C10L5/44 ,  C10L5/445 ,  D21C11/00 ,  D21C11/0007 ,  D21C11/04 ,  Y02E50/10 ,  Y02E50/30 ,  Y02P40/44

摘要： The method is for separation of lignin from original black liquor (BLIN) that has a first precipitation phase (PR1/PR2) for precipitation of lignin by a first acidification using acidifier, CO2, at alkaline conditions, then separating a lignin cake with subsequent suspension of the lignin cake in a strong acid in order to leach out metals from the lignin followed by dewatering and obtaining a clean lignin product LP. Lignin germ particles (LG) are added to the original black liquor in the first precipitation stage, preferably between two phases in said precipitation stage, in order to increase lignin particle growth on such lignin germ particles instead of spontaneous nucleation of lignin particles in said original black liquor. This results in improved filterability in subsequent dewatering and lignin cake formation and hence an increased lignin yield.

摘要翻译： 该方法用于将木质素与原始黑液（BLIN）分离，该原液具有第一沉淀相（PR1 / PR2），用于通过在碱性条件下使用酸化剂CO 2进行第一次酸化沉淀木质素，然后将木质素饼与随后的悬浮液分离 的木质素饼在强酸中以从木质素中浸出金属，随后脱水并获得干净的木质素产物LP。 在第一沉淀阶段，优选在所述沉淀阶段的两相之间，将木质素颗粒（LG）添加到原始黑液中，以便增加木质素颗粒生长在木质素颗粒上，而不是在原始的木质素颗粒中自发成核木质素颗粒 黑酒。 这导致改进的随后脱水和木质素饼形成过程中的过滤性，从而增加了木质素产率。

公开(公告)号：US08821686B2

公开(公告)日：2014-09-02

申请号：US12990869

申请日：2009-05-05

申请人： Jani Lehto ,  Kari Kuukkanen ,  Timo Honkola

发明人： Jani Lehto ,  Kari Kuukkanen ,  Timo Honkola

IPC分类号： D21C11/04 ,  D21C11/06 ,  D21C11/12

CPC分类号： D21C11/04 ,  D21C11/06 ,  D21C11/12 ,  D21C11/125 ,  Y02P40/44 ,  Y02P70/24

摘要： The invention relates to a method and equipment for treatment of black liquor at a pulp mill in order to recover chemicals and energy contained therein. In the invention, the black liquor is pyrolyzed in a pyrolysis reactor (4), the formed gaseous components are forwarded for utilization and the solids are mixed with water, whereby the formed solids are returned to a lime burning kiln (1) and the sodium-hydroxide-containing liquid is returned to the pulp cooking process.

摘要翻译： 本发明涉及在纸浆厂处理黑液以回收其中所含的化学物质和能量的方法和设备。 在本发明中，黑液在热解反应器（4）中被热解，所形成的气体组分被转运用于使用，固体与水混合，由此将形成的固体返回到石灰燃烧窑（1） 含氢氧化物的液体返回到纸浆蒸煮过程。

公开(公告)号：US20110272110A1

公开(公告)日：2011-11-10

申请号：US12789307

申请日：2010-05-27

申请人： Marcelo Moreira Leite

发明人： Marcelo Moreira Leite

IPC分类号： D21C3/02

CPC分类号： D21H17/66 ,  D21C1/02 ,  D21C1/04 ,  D21C3/02 ,  D21C9/004 ,  D21C11/0007 ,  D21C11/0042 ,  D21C11/04 ,  D21D5/00

摘要： A method for pulp processing used in connection with a pre-hydrolysis kraft process (PHKP) includes adding wood chips or similar material to a reaction vessel, performing pre-hydrolysis, and neutralizing the mixture with a first quantity of white liquor followed by a different solution such as a cold caustic extraction alkaline filtrate optionally enriched with white liquor. The neutralization fluids are replaced with a cooking fluid comprising a hot black liquor and alkaline filtrate, optionally enriched with white liquor. The cooking fluid may have a relatively high effective alkali concentration. The cooked pulp may exhibit very low residual hemicelluloses and a kappa number within an optimal range.

摘要翻译： 与预水解硫酸盐法（PHKP）相关的纸浆处理方法包括将木屑或类似材料加入到反应容器中，进行预水解，并用第一量白液中和混合物，然后用不同的 溶液，例如任选地富含白液的冷苛性碱提取碱性滤液。 中和流体用包含热黑液和碱性滤液的烹饪液替代，任选地富含白液。 烹调液可能具有较高的有效碱浓度。 煮熟的纸浆可以在最佳范围内显示非常低的残余半纤维素和卡帕值。

公开(公告)号：US08002994B2

公开(公告)日：2011-08-23

申请号：US11791480

申请日：2005-11-24

申请人： Holger Engdahl ,  Jouni Jäntti ,  Markku Lankinen ,  Antti Mattelmäki ,  Simo Suutari ,  Mika Kottila

发明人： Holger Engdahl ,  Jouni Jäntti ,  Markku Lankinen ,  Antti Mattelmäki ,  Simo Suutari ,  Mika Kottila

IPC分类号： B01D37/00

CPC分类号： D21C11/00 ,  B01D33/21 ,  B01D33/466 ,  D21C11/04

摘要： The present invention relates to a method of treating lime mud slurry being generated in a causticizing process in a pulp mill in a disc filter, in which method the lime mud is fed in the filter, thickened on the filter discs and removed from the filter discs. The lime mud is treated in at least two stages in one and the same disc filter in such a way that the lime mud slurry entering the filter is fed onto only a part of the filter discs, on which lime mud is thickened and removed from the discs, and the removed lime mud is re-slurried in liquid, and the lime mud slurry thus obtained is fed onto a second part of the filter discs, on which lime mud is thickened and removed from the filter and led into a subsequent process stage. The invention also relates to an apparatus.

摘要翻译： 本发明涉及一种在盘式过滤器中的纸浆厂中在苛化过程中生产的灰泥泥浆的方法，其中石灰泥浆在过滤器中进料，在过滤盘上加厚并从过滤盘上除去 。 石灰泥在同一个盘式过滤器中以至少两个阶段进行处理，使得进入过滤器的石灰泥浆仅被供给到过滤盘的一部分上，其中石灰泥被增稠并从 盘，并且将去除的石灰泥浆重新浆化成液体，并将由此获得的石灰泥浆送入过滤盘的第二部分，在该第二部分的过滤盘上，将石灰泥增稠并从过滤器中取出并导入随后的处理阶段 。 本发明还涉及一种装置。

公开(公告)号：US07553394B2

公开(公告)日：2009-06-30

申请号：US10533460

申请日：2003-09-11

申请人： Saburo Furusho ,  Norio Kawano ,  Shigeru Wakamoto

发明人： Saburo Furusho ,  Norio Kawano ,  Shigeru Wakamoto

IPC分类号： D21C3/26

CPC分类号： D21C11/066 ,  D21C9/1026 ,  D21C11/04 ,  Y02P40/44

摘要： In the process for producing kraft pulp, performing a potassium ion removal step of flowing an aqueous solution containing ashes recovered from a combustion exhaust gas generated in a black solution combustion step by a dust collector through a packed bed filled with a sodium-type cation exchange organic resin to adsorb and remove potassium ions contained in the aqueous solution; and a regeneration step of treating the cation exchange organic resin used in the potassium ion removal step with a solution consisting essentially of aqueous sodium hydroxide to regenerate the cation exchange resin, where a fraction recovered from the potassium ion removal step which is rich in sodium sulfate and sodium carbonate is recycled to the black solution concentrating step, and a sodium hydroxide effluent recovered from the regeneration step is recycled to a bleaching step and used in a bleaching process.

摘要翻译： 在生产牛皮纸浆的方法中，进行钾离子去除步骤，使含有从黑色溶液燃烧步骤产生的燃烧废气中回收的含有灰分的水溶液通过集尘器通过填充有钠型阳离子交换器的填充床流动 有机树脂吸附并除去水溶液中含有的钾离子; 以及再生步骤，用基本上由氢氧化钠水溶液组成的溶液处理钾离子去除步骤中使用的阳离子交换有机树脂，以再生阳离子交换树脂，其中从富含硫酸钠的钾离子去除步骤回收的馏分 并将碳酸钠再循环至黑色浓缩浓缩步骤，从再生步骤回收的氢氧化钠流出物再循环至漂白步骤并用于漂白过程。

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：US06168685A

公开(公告)日：2001-01-02

申请号：US08323123

申请日：1994-10-14

申请人： Chris Ka Kee Ho

发明人： Chris Ka Kee Ho

IPC分类号： D21C1104

CPC分类号： D21C11/0057 ,  D21C11/04

摘要： Concentrated black liquor formed in a kraft pulp mill process is treated to effect exothermal oxidation of black liquor solids, so as to heat the concentrated black liquor and consume a proportion of the black liquor solids. Such procedure eliminates the need to use steam to preheat black liquor and decreases the overall heating value of the concentrated black liquor, allowing an increased black liquor recovery boiler capacity to be achieved.

摘要翻译： 处理在硫酸盐浆制浆工艺中形成的浓缩黑液以对黑液固体进行放热氧化，从而加热浓缩的黑液并消耗一定比例的黑液固体。 这种方法不需要使用蒸汽来预热黑液并降低浓缩的黑液的总体热值，从而允许实现增加的黑液回收锅炉容量。

公开(公告)号：US6132556A

公开(公告)日：2000-10-17

申请号：US192210

申请日：1998-09-04

申请人： C. Bertil Stromberg ,  J Robert Prough ,  Bruno S. Marcoccia ,  Richard O. Laakso ,  Carl L. Luhrmann

发明人： C. Bertil Stromberg ,  J Robert Prough ,  Bruno S. Marcoccia ,  Richard O. Laakso ,  Carl L. Luhrmann

IPC分类号： D21C3/02 ,  D21C3/22 ,  D21C3/24 ,  D21C7/00 ,  D21C7/12 ,  D21C7/14 ,  D21C9/02 ,  D21C11/00 ,  D21C11/04

CPC分类号： D21C9/02 ,  D21C11/0021 ,  D21C11/04 ,  D21C3/02 ,  D21C3/224 ,  D21C3/24 ,  D21C7/00 ,  D21C7/12 ,  D21C7/14

摘要： A method of controlling the pressure of a vertical continuous comminuted cellulosic fibrous material (wood chip) digester is provided using a pressure-control extraction in a zone relatively insensitive to changes in the flow rate of liquid introduction or removal. The method comprises controlling the pressure in the digester primarily (or substantially exclusively) by varying the flow rate of liquor extracted from the pressure-control extraction to maintain the pressure in the digester at a desired superatmospheric level while avoiding non-uniform, unstable material movement in the counter-current washing zone; and introducing dilution liquid into the digester at the at least one recirculation-dilution loop. The pressure-control extraction is preferably substantially the upper extraction in the digester. Substantially except during excessive over pressure and under pressure conditions the extraction flow from the main extraction is maintained substantially constant. Substantially only during excessive over pressure and under pressure conditions pressure control may also be practiced by controlling the rate of dilution into the at least one recirculation-dilution loop, and the extraction from the main extraction.

摘要翻译： 在对液体引入或除去流速的变化相对不敏感的区域中使用压力控制提取来提供控制垂直连续粉碎的纤维素纤维材料（木屑）蒸煮器的压力的方法。 该方法包括通过改变从压力控制提取物提取的液体的流速来控制蒸煮器中的压力（或基本上仅仅），以将蒸煮器中的压力保持在期望的超大气压水平，同时避免不均匀的不稳定的材料运动 在逆流洗涤区; 以及在所述至少一个再循环稀释循环中将稀释液引入所述消化器。 压力控制提取优选基本上是蒸煮器中的上部萃取。 基本上除了在过度过压和压力条件下，主提取物的萃取流量基本保持不变。 基本上仅在过度的过压和压力条件下，压力控制也可以通过控制稀释到至少一个再循环稀释回路中的速率以及从主提取物的萃取来实施。