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公开(公告)号：US06090240A
公开(公告)日：2000-07-18
申请号：US26562
申请日：1998-02-20
申请人： Henrik Eneberg , Jarmo Kaila , Erkki Kiiskila
发明人： Henrik Eneberg , Jarmo Kaila , Erkki Kiiskila
CPC分类号： B01D1/26 , B01D3/34 , C02F1/042 , D21C11/0042 , D21C11/106 , Y10S159/08 , Y10S159/20 , Y10S159/901
摘要： A method of inhibiting calcium carbonate scaling in a multi-stage evaporation plant of black liquor by heat-treating calcium-containing liquor includes a first stage wherein the calcium-containing liquor is heated to about 110-145.degree. C. with direct contact with the heating medium; a second stage wherein the liquor is maintained at this temperature in a retention tank for 1-20 minutes to reduce the amount of calcium in the liquor by precipitating calcium carbonate; and a third stage wherein the heat-treated liquor is evaporated for combustion.
摘要翻译： 通过热处理含钙液体在黑液的多级蒸发装置中抑制碳酸钙结垢的方法包括第一阶段，其中将含钙液体加热至约110-145℃，与 加热介质; 第二阶段，其中将液体在保留罐中保持该温度1-20分钟，以通过沉淀碳酸钙来减少液体中的钙的量; 以及第三阶段，其中将热处理液体蒸发以进行燃烧。
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公开(公告)号：US6074521A
公开(公告)日：2000-06-13
申请号：US981642
申请日：1998-01-08
CPC分类号： C01F11/16 , D21C11/0078 , D21C11/04 , Y02P40/44
摘要： A method of separating impurities from lime or the calcium carbonate or the lime sludge produced in the chemical recovery system of a pulp mill so that lime sludge or lime is dissolved in a solution containing carbonate or hydrocarbonate in order to dissolve impurities. Subsequently the lime sludge or lime is separated from the solution containing dissolved impurities. A method of causticizing green liquor containing impurities, such as silicon, in two stages. In the first stage green liquor is causticized with such an amount of lime that impurities substantially remain in the liquor. The lime produced in this stage is removed from the liquor and the rest of the lime required in the causticizing is added to this liquor, so that impurities precipitate with the lime sludge produced in the second stage and at least a portion of the lime sludge rich in impurities is discharged from the process.
摘要翻译： PCT No.PCT / FI96 / 00406 Sec。 371日期1998年1月9日 102（e）1998年1月9日PCT PCT 1996年7月10日PCT公布。 出版物WO97 / 03245 日本1997年1月30日在纸浆厂的化学回收系统中分离石灰或碳酸钙或石灰污泥中的杂质的方法，使得石灰粘泥或石灰溶解在含有碳酸盐或碳酸氢盐的溶液中以便溶解杂质 。 随后将石灰渣或石灰与含溶解杂质的溶液分离。 将含有杂质（如硅）的绿液在两个阶段中苛化的方法。 在第一阶段，绿液用这样一定量的石灰碱化，使得杂质基本上留在液体中。 在该阶段中生产的石灰从液体中除去，并且将苛性碱中所需的其余石灰加入到该液体中，使得杂质与第二阶段产生的石灰粘泥沉淀，并且至少一部分富含石灰渣 杂质从工艺中排出。
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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
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。
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公开(公告)号：US5618422A
公开(公告)日：1997-04-08
申请号：US545731
申请日：1995-02-06
申请人： Ari Pelkio
发明人： Ari Pelkio
CPC分类号： B01D33/23
摘要： A disc filter (and disc filter constructed from a number of sectors) includes a filter member and a supporting structure. The supporting structure is formed by two opposed perforated plates which each have at least about 70% flat supporting portions which separate recess portions (which typically extend radially). The recess portions of each plate are welded to either supporting portions or recess portions of the other plate.
摘要翻译： PCT No.PCT / FI94 / 00111 Sec。 371日期1996年2月6日 102（e）日期1996年2月6日PCT 1994年3月28日PCT公布。 公开号WO94 / 26389 日期1994年11月24日一种盘式过滤器（和由多个扇区构成的盘式过滤器）包括过滤构件和支撑结构。 支撑结构由两个相对的多孔板形成，每个板具有至少约70％的平坦支撑部分，该平坦支撑部分分开凹部（其通常径向延伸）。 每个板的凹部被焊接到另一个板的支撑部或凹部。
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公开(公告)号：US6024028A
公开(公告)日：2000-02-15
申请号：US38059
申请日：1998-03-11
申请人： Jorma Simonen
发明人： Jorma Simonen
摘要： A method and apparatus for extending the life of air ports and nozzles in furnaces, particularly recovery boilers for burning black liquor to produce heat and a chemical melt. Apparatus is provided for feeding combustion air into a furnace having a tube wall, the apparatus comprising: an air port disposed in the tube wall, and connected to an air duct through which air flows into and then through the air port, and into the furnace; and a protective insert of heat conductive and heat and corrosion resistant material mounted in the air port and positioned so that it is cooled by the air flowing through the air port. The protective insert has sufficient thermal mass (e.g. a volume of between 40,000-4,000,000 cubic mm) so as to effectively even out temperature peaks caused by melt splashes from the furnace impacting the vicinity of the air port, e. g. the protective insert is made out of highly corrosion resistant steel such as stainless steel. The air port may be defined by, or comprise, a nozzle having an interior and a bottom portion; and wherein the protective insert is preferably releasably mounted to the interior bottom portion of the nozzle in the air flow from an air duct to the furnace.
摘要翻译： 一种用于延长炉子中空气端口和喷嘴寿命的方法和装置，特别是用于燃烧黑液以产生热量和化学熔体的回收锅炉。 提供了用于将燃烧空气供入具有管壁的炉中的装置，该装置包括：设置在管壁中的空气端口，并连接到空气管道，空气流过空气管道，然后通过空气通道进入炉内 ; 以及安装在空气端口中的导热和耐热和耐腐蚀材料的保护插入物，并被定位成使其被流经空气端口的空气冷却。 保护性插入物具有足够的热质量（例如体积在40,000-4,000,000立方毫米）之间，以便有效地均匀地从熔炉中溅出的温度峰值，该熔融物从撞击空气端口附近的炉子溅出， G。 保护性插入物由不锈钢等高耐蚀性钢制成。 空气端口可以由具有内部和底部的喷嘴限定或包括， 并且其中所述保护插入件优选地可从所述空气管道到所述炉子的空气流中可释放地安装到所述喷嘴的内部底部部分。
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公开(公告)号：US5787844A
公开(公告)日：1998-08-04
申请号：US609041
申请日：1996-02-29
申请人： Raimo Paju
发明人： Raimo Paju
CPC分类号： F22D1/04 , F22B31/045 , Y02E20/12
摘要： An otherwise conventional recovery boiler for burning black liquor (e.g. with a consistency of between about 70-90%) requires less capital investment and takes up less space by constructing the economizers in a particular manner. At least first and second economizers are provided for preheating feed water utilizing flue gas from combustion of the black liquor. The economizers are positioned substantially adjacent each other and connected in such a way that flue gas leaving the first economizer passes substantially directly (i.e. without going through a conventional accessory passage) into the second economizer. The economizer inlets and outlets are substantially at the same level as the adjacent economizer outlets and inlets, or vertically spaced less than about one-third the length of the previous economizer. A boiler bank may be connected between the superheater section of the recovery boiler and the first economizer, and any number of economizers can be utilized. The flue gas flowing through one economizer are turned after exiting so that it flows in a substantially opposite direction while passing through the adjacent economizer.
摘要翻译： 用于燃烧黑液（例如，约70-90％的稠度）的另外常规的回收锅炉需要较少的资本投资，并且通过以特定方式构造节能器而占用更少的空间。 提供至少第一和第二节能器用于利用来自黑液燃烧的烟道气预热给水。 经济器基本上彼此相邻地定位并且以使得离开第一节能器的烟道气基本上直接（即，不经过常规附件通道）进入第二节能器的方式连接。 节能器入口和出口基本上处于与相邻的经济器出口和入口相同的水平面，或者垂直间隔小于前一个节能器的长度的三分之一。 锅炉组可以连接在回收锅炉的过热器部分和第一节能器之间，并且可以使用任何数量的节能器。 流经一个节能器的烟道气在离开之后转动，使得其在通过相邻的节能器的同时沿着基本相反的方向流动。
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公开(公告)号：US5662790A
公开(公告)日：1997-09-02
申请号：US539242
申请日：1995-10-04
CPC分类号： D21B1/327 , B03D1/14 , B03D1/1418 , B03D1/1425 , B03D1/24 , B03D1/082 , B03D1/1412 , B03D1/1462 , Y02W30/646
摘要： A deinking system for use with recycled paper pulp includes a number of gas sparged hydrocyclones mounted around the outer periphery of a foam separation vessel, with the slurry outlet from each hydrocyclone introducing slurry into the vessel below the level of liquid in the vessel, and above the accepts outlet from the bottom of the vessel. An annular trough is provided adjacent the top and outer periphery of the vessel, and has a bottom sloping to one or more drain outlets. The hydrocyclone discharge conduits into the vessel are tangential to cause bubble-releasing swirling of the slurry in the vessel. The cyclone preferably is pedestal-less, and has a single gas inlet, and a deflector within the annular air jacket of the hydrocyclone. At least one substantially conical substantially uniform back pressure generator may be disposed in the hydrocyclone slurry outlet, a foam conveyance and breaking device may be associated with the drain outlet from the trough, and a foam and rejects handling tank connected to the foam conveyance and breaking device and including a substantially spiral downwardly extending feed ramp may also be provided.
摘要翻译： 用于再生纸浆的脱墨系统包括安装在泡沫分离容器的外周周围的多个气体喷射水力旋流器，其中每个水力旋流器的浆料出口将浆料引入容器内的容器中的液体以下，以上 从容器底部接受出口。 在容器的顶部和外部周边附近提供环形槽，并且具有向一个或多个排出口倾斜的底部。 水力旋流器排放管道进入容器是切向的，导致容器中浆液的气泡释放漩涡。 旋风分离器优选是无底座的，并且具有单个气体入口和在水力旋流器的环形空气套内的偏转器。 至少一个基本上圆锥形的基本上均匀的背压发生器可以设置在水力旋流器浆料出口中，泡沫输送和断开装置可以与槽的排水出口相关联，并且泡沫和废物处理罐连接到泡沫输送和断裂 并且还可以提供包括大致螺旋形的向下延伸的进料斜坡。
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公开(公告)号：US5632859A
公开(公告)日：1997-05-27
申请号：US710071
申请日：1991-06-04
申请人： Pertti Heitto , Vesa Junttila , Erkki Kiiskil a , Tarmo Sulander
发明人： Pertti Heitto , Vesa Junttila , Erkki Kiiskil a , Tarmo Sulander
摘要： A mill for the processing and production of wood pulp is contained substantially entirely within a single, integral structure that defines a unitarily-covered space substantially bounding and enclosing the mill. The mill includes a main control room or station for overall monitoring and control of pulp processing operations in the mill, the main control station being disposed substantially centrally within the covered space, and a plurality of processing stations at which various pulp processing operations take place in a generally sequential manner or order. The plural processing stations are disposed within the covered space and radially outwardly from the main control station, with individual ones of the processing stations being arranged and located in the covered space relative to others of the processing stations so that as the pulp undergoes the sequential processing operations at the plural processing stations the pulp proceeds substantially circumferentially about the main control station between and among the individual processing stations.
摘要翻译： 用于木浆加工和生产的研磨机基本上完全包含在单一的整体结构中，该结构限定了基本上包围并包围研磨机的整体覆盖的空间。 该工厂包括一个主控制室或站，用于在轧机中进行纸浆加工操作的总体监控和控制，主控制台基本上位于被覆空间内的中央处，以及多个处理站，各种纸浆处理操作在此处进行 一般是顺序的方式或顺序。 多个处理站被布置在被覆空间内并且从主控制站径向向外放置，其中处理站中的各个处理站相对于处理站的其他处理站被布置和定位在被覆盖空间中，使得当纸浆经历顺序处理 在多个处理站的操作中，纸浆在各个处理站之间和之间大致周向地围绕主控制站进行。
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公开(公告)号：US6030494A
公开(公告)日：2000-02-29
申请号：US145971
申请日：1998-09-03
申请人： Mikko Hupa , Erkki Kiiskila
发明人： Mikko Hupa , Erkki Kiiskila
CPC分类号： B01D53/48 , B01D53/58 , F23G7/06 , F23J15/00 , F23J2215/10
摘要： A method is provided for reducing emissions of harmful nitrogen compounds from a pulp mill (e.g. kraft mill) having malodorous gases which include ammonia and reduced sulphur compounds therein. The method is practiced by (a) treating the pulp mill malodorous gases to lower the ammonia content thereof (e.g. by washing them with a bisulfite solution, such as one produced from washing flue gases with sodium sulphite), and then (b) burning the malodorous gases (e.g. in a dedicated incinerator, recovery boiler, power boiler, or lime kiln) under conditions which effect oxidation of reduced sulfur compounds therein (e.g. with an air excess of at least about 3% and a temperature of over 800 degrees C) so as to reduce odor emissions and emissions of harmful nitrogen compounds from the pulp mill. In the method (a) and (b) may be practiced using malodorous gas from a steam stripper as part of the malodorous gases treated, and the operating conditions, including the pH, of the stream stripper may be regulated in order to reduce the ammonia content of the clean condensate it produces.
摘要翻译： 提供了一种从具有恶臭气体的纸浆厂（如牛皮纸浆厂）中减少有害氮化合物排放的方法，其中包括氨和还原硫化合物。 该方法的实施方式是（a）处理纸浆厂恶臭气体以降低其氨含量（例如通过用亚硫酸氢钠洗涤烟气制备的亚硫酸氢盐溶液洗涤），然后（b）将 恶臭气体（例如在专用焚化炉，回收锅炉，动力锅炉或石灰窑）中，在其中还原的硫化合物的氧化作用的条件下（例如，空气过剩至少约3％，温度超过800摄氏度） 以减少来自纸浆厂的气味排放和有害氮化合物的排放。 在方法（a）和（b）中可以使用来自蒸汽汽提器的恶臭气体作为所处理的恶臭气体的一部分来实施，并且可以调节流动汽提器的操作条件，包括pH，以便减少氨 其产生的干净的冷凝水的内容。
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公开(公告)号：US5989018A
公开(公告)日：1999-11-23
申请号：US886403
申请日：1997-07-01
申请人： Arto Ahvenainen
发明人： Arto Ahvenainen
CPC分类号： F27B7/3205 , F27B7/20 , F27B7/36
摘要： A method and apparatus for supplying lime sludge to a rotary kiln guides the flow of the lime sludge into the kiln, and the flow of flue gases out of the kiln, in distinct paths so that contact between the lime sludge entering the kiln and flue gases exiting the kiln is substantially prevented. This is typically accomplished by providing a general horizontal tubular duct interiorly of the kiln first end and extending into a substantially vertical flue gas conduit with an annular chamber defined between an outer surface of the tubular duct and an inner surface of an inlet to the first end of the rotary kiln. The lime sludge is introduced into the annular chamber. Spiral feeding blades are preferably provided on the outer surface of the tubular duct and the duct rotates with the rotary kiln so that the spiral feeding blades engage the lime sludge and move it toward the kiln. The lime sludge is preferably dried before it is fed into the annular chamber. Different types of baffles may be provided at a top portion of the annular chamber to cause any flue gas which enters the annular chamber to exit it, and flow into the vertical flue gas conduit, adjacent a bottom portion of the annular chamber.
摘要翻译： 用于向回转窑供应石灰泥的方法和装置将石灰污泥的流动引导到窑内，并将烟道气流出窑内不同的路径，使得进入窑炉的石灰泥和烟道气之间的接触 基本上防止离开窑。 这通常通过在窑第一端内部提供一般的水平管状管道并且延伸到基本上垂直的烟道气管道中，其中环形室限定在管状管道的外表面和与第一端的入口的内表面之间 的回转窑。 石灰渣被引入环形室。 螺旋进料叶片优选设置在管状管道的外表面上，并且管道与回转窑一起旋转，使得螺旋进料叶片接合石灰渣并将其移向窑。 石灰渣优选在进料到环形室之前被干燥。 可以在环形室的顶部处设置不同类型的挡板，以使任何进入环形室的烟道气离开它，并且相邻于环形室的底部部分流入垂直烟道气管道。
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