公开(公告)号：US20030173047A1

公开(公告)日：2003-09-18

申请号：US10354179

申请日：2003-01-30

Applicant: Andritz, Inc.

Inventor： C. Bertil Stromberg ,  Aaron T. Leavitt ,  J. Robert Prough

IPC: D21C003/26 ,  D21C007/06 ,  D21C007/08

CPC classification number: D21C1/10 ,  D21C7/06

Abstract: A system and method for feeding comminuted cellulosic fibrous material such as wood chips to the top of a treatment vessel such as a continuous digester provide enhanced simplicity, operability, and maintainability by eliminating the high pressure transfer device conventionally used in the prior art. Instead of a high pressure transfer device the steamed and slurried chips are pressurized using a single vane slurry pump in series with a centrifugal slurry pump both of which are located at least thirty feet below the top of the treatment vessel and for pressurizing the slurry to a pressure of at least about 10 bar gauge.

Abstract translation: 将诸如木屑的粉碎的纤维素纤维材料进料到诸如连续蒸煮器的处理容器的顶部的系统和方法通过消除现有技术中常规使用的高压转移装置提供了增强的简单性，可操作性和可维护性。 代替高压转移装置，使用与离心式浆液泵串联的单一叶片浆料泵来加压蒸出和制浆的碎屑，两者均位于处理容器顶部至少三十英尺处，并将浆料加压至 至少约10巴表压的压力。

公开(公告)号：US20040026051A1

公开(公告)日：2004-02-12

申请号：US10633536

申请日：2003-08-05

Applicant: ANDRITZ INC.

Inventor： C. Bertil Stromberg

IPC: D21C009/12 ,  D21C009/14 ,  D21C009/153 ,  D21C003/20 ,  D21C009/16

CPC classification number: D21C9/1057 ,  D21C3/222 ,  D21C9/144 ,  D21C9/147 ,  D21C9/153 ,  D21C9/163

Abstract: An environmentally friendly (ECF), yet commercially viable, process produces fully bleached (typically having a brightness of over 89 or 90% ISO) cellulose pulp using a (ZEND) treatment. Typically pulp is produced in an essentially sulphur-free pulping process (such as an soda/AQ process), and is then treated by a D-EO-, D-EP-, or D-EOP-sequence before the (ZEND) treatment. Optional oxygen delignification may also be used, and subsequent elemental-chlorine-free bleaching sequences may also be employed, although normally not necessary since the pulp after the (ZEND) treatment has high brightness and good viscosity (e.g. over 21 cP).

Abstract translation: 环保（ECF），但商业上可行的方法使用（ZEND）处理产生完全漂白（通常具有超过89或90％ISO的亮度）纤维素纸浆。 通常，纸浆以基本上不含硫的制浆方法（例如苏打/ AQ方法）生产，然后在（ZEND）处理之前用D-EO-，D-EP-或D-EOP-序列处理 。 也可以使用任选的氧脱木素，并且也可以使用随后的无元素 - 氯的漂白顺序，尽管通常不需要，因为（ZEND）处理后的纸浆具有高亮度和良好的粘度（例如超过21cP）。

公开(公告)号：US20030089470A1

公开(公告)日：2003-05-15

申请号：US10321550

申请日：2002-12-18

Applicant: Andritz Inc.

Inventor： Auvo K. Kettunen ,  Richard O. Laakso ,  C. Bertil Stromberg ,  J. Robert Prough ,  Jay J. Miele

IPC: D21C003/26 ,  D21C007/06 ,  D21C007/08 ,  D21C007/12

CPC classification number: D21C7/06

Abstract: In the feeding of a slurry of comminuted cellulosic fibrous material to a digester (continuous or batch) in the production of chemical pulp, one of the tanks used in the feed system (which preferably includes a high pressure feeder) may be eliminated without consequent loss of its function by providing a single tank with the combined functions of controlling the level of liquid in a slurrying conduit which supplies slurry to a slurry pump, and storing and substantially continuously supplying liquid to a make-up liquid pump connected to the digester. The single tank preferably surrounds the slurrying conduit and is substantially concentric, and in liquid communication, with it. A gap of 3-48 inches may be provided between the bottom of the conduit and a connection to the slurry pump. A screen or strainer may be provided in the gap, which is substantially surrounded by the tank. The return system from the low pressure outlet of the high pressure feeder to the slurrying device (like the conduit and tank surrounding it, or a conventional clip tube) may be devoid of one or more of an in-line drainer, level tank, centrifugal separator, and surge tank.

公开(公告)号：US20040226670A1

公开(公告)日：2004-11-18

申请号：US10823763

申请日：2004-04-14

Applicant: Andritz Inc.

Inventor： Keith P. Vogel ,  John F. Bolles ,  Patrick J. Sullivan ,  C. Bertil Stromberg

IPC: D21C003/26 ,  D21C001/10 ,  D21C007/06 ,  D21C007/08 ,  D21C001/00

CPC classification number: D21C3/24 ,  D21C7/06 ,  D21C7/14

Abstract: A continuous digester for producing chemical cellulose pulp from cellulose chips including: a digester vessel with an upper section attached to a top separator and said vessel at least partially filled with the cellulose chips and a liquor; a top separator at least partially in said upper section having a lower chip inlet port, a chip conveyor, a screen adjacent the conveyor, an upper chip discharge chute, and a liquor outlet facing a side of the screen opposite to the conveyor, and a chip inlet conduit extending into the vessel and having a first operational mode in fluid communication with the chip inlet port and a second operational mode in which the chip inlet conduit discharges directly into the vessel.

Abstract translation: 一种用于从纤维素片制造化学纤维素纸浆的连续消化器，包括：具有上部连接到顶部分离器的所述蒸煮器容器，所述容器至少部分地填充有纤维素片和液体; 至少部分地在所述上部分中具有下部芯片入口的顶部分离器，切屑输送机，邻近输送机的筛网，上部切屑排出槽和面向筛网与输送机相对的一侧的液体出口，以及 芯片入口导管延伸到容器中并且具有与芯片入口端口流体连通的第一操作模式和芯片入口导管直接排放到容器中的第二操作模式。

公开(公告)号：US20030209335A1

公开(公告)日：2003-11-13

申请号：US10442076

申请日：2003-05-21

Applicant: Andritz Inc.

Inventor： Kaj O. Henricson ,  C. Bertil Stromberg ,  Richard Laakso ,  John F. Bolles ,  Keith P. Vogel ,  Patrick J. Sullivan

IPC: D21C001/10 ,  D21C007/06 ,  D21C007/08

CPC classification number: D21C3/22 ,  D21C7/14

Abstract: A method is disclosed for extracting liquor from a cellulose slurry for a continuous digester comprising the steps of: providing the cellulose slurry of liquor and chips of cellulose fiber material to a separator; extracting a first stream of liquor from the separator; extracting a second stream of liquor from the separator, where the second stream has an effective alkali (EA) concentration greater than the EA concentration of the first steam; outputting the first stream from the separator and outputting the second stream from the separator separately from the second stream, and outputting a condensed slurry from the separator to a digester vessel.

Abstract translation: 公开了一种用于从连续蒸煮器的纤维素浆料中提取液体的方法，包括以下步骤：将纤维素浆料和纤维素纤维材料碎片提供到分离器; 从分离器中提取第一液体流; 从所述分离器中提取第二液体流，其中所述第二流具有比所述第一蒸汽的EA浓度大的有效碱（EA）浓度; 从分离器输出第一流，并将第二流从分离器与第二流分开输出，并将冷凝的浆料从分离器输出到蒸煮器容器。

公开(公告)号：US20030062139A1

公开(公告)日：2003-04-03

申请号：US10290272

申请日：2002-11-08

Applicant: Andritz, Inc.

Inventor： Keith P. Vogel ,  John F. Bolles ,  C. Bertil Stromberg

IPC: D21C007/06 ,  D21C007/08

CPC classification number: D21C7/00 ,  D21C7/06 ,  D21C7/14

Abstract: A top separator assembly for a digester is disclosed comprising: a rotatable shaft for the top separator; a packing for the shaft; and a sealing ring operatively mounted to the shaft and having a nominal clearance with the pack box, said sealing ring mounted so that up lifting of said shaft provides a substantially fluid tight seal between said pack box and a side of said ring (in the digester) opposite the pack box.

公开(公告)号：US20030089469A1

公开(公告)日：2003-05-15

申请号：US10321439

申请日：2002-12-18

Applicant: Andritz, Inc.

Inventor： Auvo K. Kettunen ,  Richard O. Laakso ,  C. Bertil Stromberg ,  J. Robert Prough ,  Jay J. Miele

IPC: D21C003/26 ,  D21C007/06 ,  D21C007/08 ,  D21C007/14

CPC classification number: D21C7/06

Abstract: In the feeding of a slurry of comminuted cellulosic fibrous material to a digester (continuous or batch) in the production of chemical pulp, one of the tanks used in the feed system (which preferably includes a high pressure feeder) may be eliminated without consequent loss of its function by providing a single tank with the combined functions of controlling the level of liquid in a slurrying conduit which supplies slurry to a slurry pump, and storing and substantially continuously supplying liquid to a make-up liquid pump connected to the digester. The single tank preferably surrounds the slurrying conduit and is substantially concentric, and in liquid communication, with it. A gap of 3-48 inches may be provided between the bottom of the conduit and a connection to the slurry pump. A screen or strainer may be provided in the gap, which is substantially surrounded by the tank. The return system from the low pressure outlet of the high pressure feeder to the slurrying device (like the conduit and tank surrounding it, or a conventional clip tube) may be devoid of one or more of an in-line drainer, level tank, centrifugal separator, and surge tank.

公开(公告)号：US20030089467A1

公开(公告)日：2003-05-15

申请号：US10321428

申请日：2002-12-18

Applicant: Andritz Inc.

Inventor： Auvo K. Kettunen ,  Richard O. Laakso ,  C. Bertil Stromberg ,  J. Robert Prough ,  Jay J. Miele

IPC: D21C003/26 ,  D21C007/14 ,  D21C007/06 ,  D21C007/08 ,  D21C007/12

CPC classification number: D21C7/06

Abstract: In the feeding of a slurry of comminuted cellulosic fibrous material to a digester (continuous or batch) in the production of chemical pulp, one of the tanks used in the feed system (which preferably includes a high pressure feeder) may be eliminated without consequent loss of its function by providing a single tank with the combined functions of controlling the level of liquid in a slurrying conduit which supplies slurry to a slurry pump, and storing and substantially continuously supplying liquid to a make-up liquid pump connected to the digester. The single tank preferably surrounds the slurrying conduit and is substantially concentric, and in liquid communication, with it. A gap of 3-48 inches may be provided between the bottom of the conduit and a connection to the slurry pump. A screen or strainer may be provided in the gap, which is substantially surrounded by the tank. The return system from the low pressure outlet of the high pressure feeder to the slurrying device (like the conduit and tank surrounding it, or a conventional clip tube) may be devoid of one or more of an in-line drainer, level tank, centrifugal separator, and surge tank.

公开(公告)号：US20030089466A1

公开(公告)日：2003-05-15

申请号：US10321424

申请日：2002-12-18

Applicant: Andritz, Inc.

Inventor： Auvo K. Kettunen ,  Richard O. Laakso ,  C. Bertil Stromberg ,  J. Robert Prough ,  Jay J. Miele

IPC: D21C001/10 ,  D21C003/26 ,  D21C007/06 ,  D21C007/08

CPC classification number: D21C7/06

Abstract: In the feeding of a slurry of comminuted cellulosic fibrous material to a digester (continuous or batch) in the production of chemical pulp, one of the tanks used in the feed system (which preferably includes a high pressure feeder) may be eliminated without consequent loss of its function by providing a single tank with the combined functions of controlling the level of liquid in a slurrying conduit which supplies slurry to a slurry pump, and storing and substantially continuously supplying liquid to a make-up liquid pump connected to the digester. The single tank preferably surrounds the slurrying conduit and is substantially concentric, and in liquid communication, with it. A gap of 3-48 inches may be provided between the bottom of the conduit and a connection to the slurry pump. A screen or strainer may be provided in the gap, which is substantially surrounded by the tank. The return system from the low pressure outlet of the high pressure feeder to the slurrying device (like the conduit and tank surrounding it, or a conventional clip tube) may be devoid of one or more of an in-line drainer, level tank, centrifugal separator, and surge tank.

公开(公告)号：US20030089468A1

公开(公告)日：2003-05-15

申请号：US10321436

申请日：2002-12-18

Applicant: Andritz Inc.

Inventor： Auvo K. Kettunen ,  Richard O. Laakso ,  C. Bertil Stromberg ,  J. Robert Prough ,  Jay J. Miele

IPC: D21C003/26 ,  D21C007/06 ,  D21C007/08

CPC classification number: D21C7/06

Abstract: In the feeding of a slurry of comminuted cellulosic fibrous material to a digester (continuous or batch) in the production of chemical pulp, one of the tanks used in the feed system (which preferably includes a high pressure feeder) may be eliminated without consequent loss of its function by providing a single tank with the combined functions of controlling the level of liquid in a slurrying conduit which supplies slurry to a slurry pump, and storing and substantially continuously supplying liquid to a make-up liquid pump connected to the digester. The single tank preferably surrounds the slurrying conduit and is substantially concentric, and in liquid communication, with it. A gap of 3-48 inches may be provided between the bottom of the conduit and a connection to the slurry pump. A screen or strainer may be provided in the gap, which is substantially surrounded by the tank. The return system from the low pressure outlet of the high pressure feeder to the slurrying device (like the conduit and tank surrounding it, or a conventional clip tube) may be devoid of one or more of an in-line drainer, level tank, centrifugal separator, and surge tank.