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：US20080164222A1

公开(公告)日：2008-07-10

申请号：US11791480

申请日：2005-11-24

申请人： Holger Engdahl ,  Jouni Jantti ,  Markku Lankinen ,  Antti Mattelmaki ,  Simo Suutari ,  Mika Kottila

发明人： Holger Engdahl ,  Jouni Jantti ,  Markku Lankinen ,  Antti Mattelmaki ,  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：US5735331A

公开(公告)日：1998-04-07

申请号：US722782

申请日：1996-09-27

申请人： Holger Engdahl ,  Jouni Jantti

发明人： Holger Engdahl ,  Jouni Jantti

IPC分类号： D21C11/12 ,  D21C11/02

CPC分类号： D21C11/122

摘要： A method of regulating the temperature in a chemical melt dissolving tank, where chemical melt produced in combustion of spent liquor of a cellulose pulp mill is dissolved in liquid, producing green liquor, provides excellent heat economy, while minimizing the amount of liquid needed to dissolve the melt to produce green liquor at a temperature below boiling. Green liquor produced in the dissolving tank is expanded (and thereby cooled) in a vacuum tank, and a least a significant part of the cooled liquor is returned to the dissolving tank, for regulating the temperature in the tank. The heat energy contained in the generated expansion steam may be used in many different ways, for example, for indirectly heating (e.g. in a heat exchanger acting as a condenser) water or other liquid to a sufficiently high temperature so that the liquid is useful elsewhere in the pulp mill. The vacuum tank may be positioned above dissolving the tank to receive liquor directly from it, and the condenser may be positioned in it to return condensate directly to the dissolving tank. Alternatively the vacuum tank and condenser may be remote from the dissolving tank and connected to the dissolving tank by conduits.

摘要翻译： 一种调节化学熔融溶解槽中的温度的方法，其中在纤维素纸浆厂的废液的燃烧中产生的化学熔体溶解在液体中，产生绿液，提供优异的热效率，同时使溶解所需的液体量最小化 在低于沸点的温度下生成绿液的熔体。 在溶解槽中产生的绿液在真空槽中膨胀（并由此冷却），至少大部分冷却的液体返回到溶解槽中，用于调节罐中的温度。 所产生的膨胀蒸汽中所含的热能可以以许多不同的方式使用，例如用于间接加热（例如，在作为冷凝器的热交换器中）水或其它液体到足够高的温度，使得液体在其他地方有用 在纸浆厂。 真空罐可以定位在溶解罐以上以直接从其接收液体，并且冷凝器可以定位在其中以将冷凝物直接返回到溶解槽。 或者，真空罐和冷凝器可以远离溶解罐并且通过导管连接到溶解槽。

公开(公告)号：US4264445A

公开(公告)日：1981-04-28

申请号：US97691

申请日：1979-11-26

申请人： Juha Lumikko ,  Matti Lankinen ,  Jaakko Savolainen ,  Martti Tolvanen ,  Yrjo Luukkainen ,  Holger Engdahl

发明人： Juha Lumikko ,  Matti Lankinen ,  Jaakko Savolainen ,  Martti Tolvanen ,  Yrjo Luukkainen ,  Holger Engdahl

IPC分类号： B01D29/50 ,  B01D29/00 ,  B01D29/46 ,  B01D29/62 ,  B01D29/66 ,  D21C11/04 ,  B01D29/38 ,  B01D29/30

CPC分类号： B01D29/54 ,  B01D29/66 ,  B01D35/147

摘要： An intermittently operating pressurized filter for concentrating a solid matter suspension, comprising a filtering tank with an inlet conduit provided with a feed pump for introducing under pressure the suspension to be filtered, and a draining conduit provided with valve for removal of the concentrated sludge, and a plurality of filtering elements suspended from the roof, through which the filtrate flows and of which the interior communicates with a filtrate collecting tank located above and which thereby collect on their external surface sludge, which has been arranged to be periodically removed by voiding the pressure within the filtering tank by opening for the suspension therein an exit flow path through a draining conduit. The filtrate in the collecting tank will pass in countercurrent fashion through the filtering elements. In the pressurized filter the filtrate has been arranged to be removed during the filtering step by a filtrate draining conduit departing from the collecting tank, by effect of the pressure produced by the feed pump in the suspension inlet conduit. The collecting tank is of enclosed construction. The sludge has been arranged to be removed from the surface of the filtering elements by the aid of the hydrostatic pressure of the filtrate in the collecting tank, by placing th draining conduit of the collecting tank under atmospheric pressure.

摘要翻译： 一种用于浓缩固体物质悬浮液的间歇操作的加压过滤器，其包括具有进料管的过滤罐，所述进料管设置有用于在压力下引入要过滤的悬浮液的进料泵，以及设置有用于除去浓缩污泥的阀的排水管道，以及 从顶部悬挂的多个过滤元件，滤液通过该过滤元件流过，并且其内部与位于上方的滤液收集罐连通，并且由此在其外表面上收集污泥，其被布置为通过排除压力而周期性地去除 在过滤罐内通过打开其中的悬浮液通过排水管道的出口流动路径。 收集罐中的滤液将以逆流方式通过过滤元件。 在加压过滤器中，通过由进料泵在悬浮液入口导管中产生的压力，滤液已经布置成在过滤步骤期间通过从收集罐离开的滤液排液管道去除。 收集罐采用封闭结构。 通过将收集罐的排水导管放置在大气压力下，通过借助于收集罐中的滤液的静水压力，将污泥排列成从过滤元件的表面移除。

公开(公告)号：US5788813A

公开(公告)日：1998-08-04

申请号：US704542

申请日：1996-09-11

申请人： Holger Engdahl ,  Martti Pokkinen ,  Pekka Tormikoski

发明人： Holger Engdahl ,  Martti Pokkinen ,  Pekka Tormikoski

IPC分类号： D21C11/04 ,  D21C11/00

CPC分类号： D21C11/0078 ,  Y02P40/44

摘要： A method and apparatus for treating green liquor from a sulphate pulp mill enhances the clarification of the green liquor and may easily be integrated into existing pulp mills. A first portion of the green liquor from the sulphate pulp mill is clarified in a clarifier to produce a clarified green liquor and a dregs-containing green liquor. The dregs-containing green liquor is filtered in a green liquor filter to produce filtrate and dregs. The filtrate is combined) with the clarified green liquor to produce a first combined stream; and the dregs are filtered in a dregs filter. A second portion of green liquor from the sulphate pulp mill is combined with the dregs-containing green liquor to produce a second combined stream, and the second combined stream is introduced into the green liquor filter. The dregs from step (b) are washed prior to filtering the dregs, the green liquor filter and washer comprising a single structure.

摘要翻译： PCT No.PCT / FI95 / 00125 Sec。 371日期：1996年9月11日 102（e）日期1996年9月11日PCT Filed Mar. 6，1995 PCT Pub。 出版物WO95 / 25198 日期1995年9月21日用于处理来自硫酸盐纸浆磨浆机的绿液的方法和设备增强了绿液的澄清，并且可以容易地集成到现有的纸浆厂中。 来自硫酸盐纸浆厂的绿液的第一部分在澄清器中澄清以产生澄清的绿液和含渣渣的绿液。 将含有渣的绿液在绿液过滤器中过滤以产生滤液和渣滓。 将滤液合并）与澄清的绿液混合以产生第一组合流; 并且渣滓在渣滓过滤器中过滤。 将来自硫酸盐纸浆磨机的第二部分绿液与含渣渣的绿液混合以产生第二组合料流，将第二组合料流引入绿液过滤器中。 在过滤渣滓，绿液过滤器和包含单一结构的洗涤剂之前，将步骤（b）的渣滓洗涤。

公开(公告)号：US5618443A

公开(公告)日：1997-04-08

申请号：US434689

申请日：1995-05-04

申请人： Holger Engdahl ,  Pekka Tormikoski

发明人： Holger Engdahl ,  Pekka Tormikoski

IPC分类号： B01D29/39 ,  B01D37/00 ,  B01D29/00

CPC分类号： B01D29/39

摘要： A filtering method and apparatus pass the suspension (e.g. green liquor) to be filtered in a falling film down a first side of a filtering surface of a filter element at a different (higher) pressure than a second side, so that due to the pressure difference prevailing across the filtering surface the filtrate flows through the filtering surface and separated solids substantially remain in the suspension, without forming an undesirable solids layer on the filtering surface. A uniform liquid film falling on the filtering surface is generated by recirculating suspension from the bottom of the filter housing to an upper portion of the filter element. Nozzles may direct flow toward the filtering surface in localized areas. The method may be practiced continuously or in batches.

摘要翻译： 过滤方法和装置在与第二侧不同的（更高）的压力下将在过滤元件的过滤表面的第一侧的降膜中的待过滤的悬浮液（例如绿液）通过，使得由于压力 过滤表面上的差异主要在于滤液流过过滤表面，分离的固体基本上保留在悬浮液中，而不会在过滤表面上形成不需要的固体层。 落在过滤表面上的均匀的液膜通过从过滤器壳体的底部循环到过滤元件的上部而产生。 喷嘴可以在局部区域中引导流向过滤表面。 该方法可以连续地或分批地实施。

公开(公告)号：US4687583A

公开(公告)日：1987-08-18

申请号：US838921

申请日：1986-03-12

申请人： Matti Lankinen ,  Holger Engdahl ,  Raimo Kohonen ,  Jukka Niskanen ,  Markku Kosonen

发明人： Matti Lankinen ,  Holger Engdahl ,  Raimo Kohonen ,  Jukka Niskanen ,  Markku Kosonen

IPC分类号： B01D33/06 ,  B01D24/46 ,  B01D33/00 ,  B01D33/44 ,  B01D33/58 ,  B01D37/02 ,  B01D37/04 ,  C01F11/02 ,  C01F11/18 ,  C04B2/02 ,  D21C11/00 ,  D21C11/04

CPC分类号： B01D37/02 ,  B01D33/06 ,  B01D33/466 ,  C01F11/02 ,  C04B2/02 ,  D21C11/0064 ,  Y02P40/44 ,  Y10S210/928

摘要： In a procedure for filtering lime sludge meant to be regenerated to lime. Lime sludge is produced in the causticizing process in a sulphate cellulose mill, where it can be reused after regeneration to lime. In the procedure, lime sludge suspension is filtered on a filter drum in continuous rotation by depositing lime sludge on the drum and detaching part of the superficial layer of the lime sludge on the drum with a scraper so that the deeper lime sludge layer on the drum, which by-passes the scraper, serves as filtering medium for the superficial layer that is detached (as a so-called pre-coat). The purpose is to arrange the control of the filtering process so that the dry matter content of the lime sludge detached from the drum is substantially constant, and its essential feature is that the dry matter content of the lime sludge detached from the drum is followed so that when the dry matter content tends to decrease, the speed of rotation of the drum is first raised within a given control range and, after the control range has been used up, the scraper is moved closer to the surface of the drum so that at least part of the deeper lime sludge layer on the drum, serving as filtering medium, is detached and, if the scraper is returned to its earlier position, is replaced with a new lime sludge layer, whereupon the control is again continued with the aid of the drum's speed of rotation.

摘要翻译： 在用于过滤要再生为石灰的石灰泥的过程中。 石灰污泥在硫酸纤维素磨机的苛化过程中生产，在再生成石灰之后可以重新使用。 在该程序中，将石灰粘泥悬浮液在连续旋转的过滤鼓上过滤，通过在滚筒上沉积石灰渣并用刮刀将滚筒上的部分石灰污泥的表面层分离，使得滚筒上较深的石灰渣层 ，它绕过刮刀，用作剥离的表层的过滤介质（如所谓的预涂层）。 目的在于安排过滤过程的控制，使得从滚筒分离的石灰渣的干物质含量基本上不变，其主要特征是从滚筒上分离的石灰粘泥的干物质含量如下 当干物质含量倾向于降低时，滚筒的旋转速度首先在给定的控制范围内升高，并且在控制范围已经用完之后，刮刀移动到更靠近滚筒的表面，使得在 用作过滤介质的鼓上较深部分的较深的石灰渣层被分离，并且如果刮刀返回到其较早的位置，则用新的石灰渣层代替，于是控制再次借助于 鼓的旋转速度。

公开(公告)号：US4243533A

公开(公告)日：1981-01-06

申请号：US19622

申请日：1979-03-12

申请人： Jaakko Savolainen ,  Holger Engdahl ,  Yrjo Luukkainen ,  Martti Tolvanen ,  Jorma Surakka

发明人： Jaakko Savolainen ,  Holger Engdahl ,  Yrjo Luukkainen ,  Martti Tolvanen ,  Jorma Surakka

IPC分类号： B01D29/46 ,  B01D27/00 ,  B01D29/00 ,  B01D29/50 ,  B01D29/62 ,  B01D29/66 ,  B01D29/38

CPC分类号： B01D29/11 ,  B01D29/54

摘要： Periodically operating pressure filter for the concentration of a solid matter suspension, comprising a filtering tank with an input conduit for introducing the suspension to be filtered under pressure, and a drain conduit for removal of the concentrated sludge, and a number of filtering elements suspended from the ceiling, through which the filtrate flows and which are internally in communication with a filtrate collecting tank located above and which thereby collect sludge on their outer surface. The sludge has been arranged to be periodically detached by making the pressure inside the filtering element higher than on its outside. The filtrate is under atmospheric pressure in the collecting tank. For detaching the sludge periodically from the outer surfaces on the filtering elements the pressure has been arranged to be removable from the filtering tank by opening for the suspension residing there, an exit flow, whereby the filtrate in the collecting tank will pass under hydrostatic pressure effect in counter-current fashion through the filtering elements.

摘要翻译： 用于浓缩固体物质悬浮液的定期操作的压力过滤器，包括具有用于在压力下引入待过滤的悬浮液的输入管道的过滤槽和用于除去浓缩污泥的排出管道以及从 滤液流过的天花板，内部与位于上方的滤液收集罐连通，从而在其外表面收集污泥。 通过使过滤元件内部的压力高于其外部，污泥被布置成周期性地分离。 滤液在收集罐内处于大气压下。 为了从过滤元件的外表面周期性地分离污泥，压力被布置成通过打开驻留在那里的悬浮液而从过滤罐移除压力，出口流动，由此收集罐中的滤液将在静水压力作用下通过 通过过滤元件以逆流的方式。

公开(公告)号：US5620596A

公开(公告)日：1997-04-15

申请号：US433348

申请日：1995-06-01

申请人： Holger Engdahl ,  Pekka Tormikoski

发明人： Holger Engdahl ,  Pekka Tormikoski

IPC分类号： B01D29/50 ,  B01D29/11 ,  B01D29/72 ,  B01D37/00 ,  B01D29/00

CPC分类号： B01D29/118 ,  B01D2201/0469 ,  B01D29/72

摘要： A cross-flow filtration apparatus is able to produce cleaner liquid, especially in the filtration of green liquor, then is typically possible. A housing contains a number of vertical filter elements each having a filter surface with first and second sides which are substantially free of filter cake. A higher gas pressure is provided on the first sides of the filter surfaces than the second sides, and filtered liquid passes through the filter surface from the first side to the second side. A first conduit withdraws filtrate from the second side of at least one of the surfaces, and a second conduit withdraws suspension liquid from adjacent the bottom of the filter elements and typically (though not necessarily) recirculates it. Suspension is introduced--such as in a tray with a perforated bottom mounted above the filter elements, and/or the nozzles--so that the suspension flows in a falling film down the first sides and in contact with them, so that filter cake does not form during operation. A sludge vessel is typically connected to the second conduit external of the housing, and an open dregs vessel distinct from the sludge vessel may be connected to a bottom portion of the housing.

摘要翻译： PCT No.PCT / FI94 / 00485 Sec。 371日期：1995年6月1日 102（e）1995年6月1日PCT PCT 1994年10月27日PCT公布。 公开号WO95 / 12446 日期1995年5月11日横流过滤装置能够生产更清洁的液体，特别是在绿液过滤中，因此通常是可能的。 壳体包含多个垂直过滤器元件，每个过滤元件具有基本上没有滤饼的具有第一和第二侧面的过滤器表面。 在过滤器表面的第一侧上设置比第二侧更高的气体压力，并且过滤的液体从第一侧向第二侧通过过滤器表面。 第一管道从至少一个表面的第二侧抽出滤液，第二管道将悬浮液从附近的过滤器元件的底部抽出，通常（但不一定）使其再循环。 引入悬浮液，例如在具有安装在过滤元件上方的穿孔底部的托盘和/或喷嘴中，使得悬浮液沿着第一侧向下流动并与其接触，使得滤饼不会 形式在运作。 污泥容器通常连接到壳体外部的第二导管，并且与污泥容器不同的开放的渣滓容器可以连接到壳体的底部。

公开(公告)号：US4762590A

公开(公告)日：1988-08-09

申请号：US870244

申请日：1986-06-03

申请人： Holger Engdahl

发明人： Holger Engdahl

IPC分类号： C01D1/22 ,  C01F11/02 ,  D21C11/00 ,  D21C11/04 ,  D21C11/12

CPC分类号： D21C11/0064 ,  Y02P40/44 ,  Y10S423/03

摘要： The invention concerns a causticizing procedure by which from soda liquor derived from a sulphate cellulose digesting process and from unslaked lime is produced white liquor for reuse in the digesting process, over lime slaking and a subsequent causticizing reaction proper. It is essential in the invention that the lime slaking is carried out using white liquor, whereafter the causticizing reaction proper is allowed to take place between the slaked lime and soda liquor combined therewith. The requisite white liquor is obtained by recirculating part of the white liquor produced by the causticizing process, to the slaking step, where it either completely or partially replaces the soda liquor employed in prior art. By using white liquor, one avoids the foaming, interfering with the process, which is encountered in the slaking step.

摘要翻译： 本发明涉及一种苛化程序，通过该方法来源于硫酸纤维素消化方法的苏打液和来自未浸渍的石灰的白液在消化过程中产生白液以供重新使用，经过石灰消化和随后的苛化反应。 在本发明中，必须使用白液进行酸洗，然后在熟石灰与与其结合的苏打液之间进行适当的苛化反应。 通过将由苛化过程产生的白液的一部分再循环到熟化步骤获得所需的白液，其中完全或部分替代现有技术中使用的苏打液。 通过使用白液，可以避免发泡，干扰步骤中遇到的过程。