| Patent Number |
Title Of Patent |
Date Issued |
| 7615134 |
Method and arrangement of impregnating chips |
November 10, 2009 |
| The method and an arrangement are for improved impregnation of chips in association with the manufacture of chemical cellulose pulp. Un-steamed chips are fed into an impregnation vessel (30) in which a fluid level (LIQ_LEV) is established under the highest level (CH_LEV) of the chips. |
| 7540937 |
Method for continuous cooking |
June 2, 2009 |
| A procedure for the continuous cooking of chemical pulp, comprising an impregnation vessel 101 and a digester 102. The chips are impregnated in the impregnation vessel 101and are fed after impregnation together with circulation fluid through a transfer line 103 to a top separator 105 on |
| 7422657 |
Method for the feed of cellulose chips during the continuous cooking of cellulose |
September 9, 2008 |
| The method is for feeding a chips-slurry from a low-pressure to a high-pressure system during the continuous cooking of chemical cellulose pulp. The feed takes place through a sluice feeder 53' between these systems. The sluice feeder is provided with a rotor with through-pockets 1, |
| 7381302 |
Method and arrangement for impregnating chips |
June 3, 2008 |
| The method and an arrangement are for improved impregnation of chips in association with the manufacture of chemical cellulose pulp. Un-steamed chips are fed into an impregnation vessel (30) in which a fluid level (LIQ_LEV) is established under the highest level (CH_LEV) of the chips. |
| 7374637 |
Method of bleaching cellulose pulp with a main conduit for wash liquor and filtrate |
May 20, 2008 |
| The method is for bleaching cellulose pulp in a bleach line that has at least two bleaching steps. The filtrate distribution is led up through the bleaching line counter-currently to the flow of cellulose pulp established in the bleaching line. A single joint main conduit is used for |
| 7279070 |
Method for the continuous cooking of wood raw material for cellulose pulp |
October 9, 2007 |
| The invention concerns a simplified method for the continuous cooking of wood raw material in the form of sawdust for the production of cellulose pulp, The method does not require any thickening stages and can be carried out with a minimum of process equipment. The complete process can |
| 7112256 |
Method for continuous cooking of chemical pulp to improve heat economy |
September 26, 2006 |
| A method for the continuous cooking of chemical pulp with the aim of achieving improved heat economy in a digester system having a vessel (1) for impregnation and a vessel (2) for cooking the impregnated cellulose chips. A part of the black liquor (14) withdrawn from the digester (2) is |
| 7077931 |
Method and bleaching line with a main conduit for wash liquor |
July 18, 2006 |
| The method is for bleaching cellulose pulp in a bleach line that has at least two bleaching steps. The filtrate distribution is led up through the bleaching line counter-currently to the flow of cellulose pulp established in the bleaching line. A single joint main conduit is used for |
| 6966970 |
Method for supplying washing liquid to a process for cooking cellulose pulp |
November 22, 2005 |
| The invention relates to a method for supplying washing liquid to a digester (1) for cellulose pulp and a subsequent diffuser washing device (2a, 2b). A high, disturbance-free production capacity can be obtained by using a common feed pump (P1) which, via a main feed line (10), supplies |
| 6843885 |
Method for controlling the cooking temperature in a continuous vapour phase digester |
January 18, 2005 |
| The method is for controlling the cooking temperature in a continuous vapour phase digester for chip-shaped cellulose material. A high pressure is established in the vapour phase largely by means of steam, without risk of attaining excessively high temperatures in the cooking. A temp |
| 6722130 |
Method of producing process steam from a black liquor |
April 20, 2004 |
| Method of producing a process steam from a first black liquor derived in connection with the production of paper pulp, wherein the first black liquor is treated to give a second black liquor of a higher concentration than the first black liquor as well as a liquid of low concentration, |
| 6699357 |
Process for continuous cooking of pulp |
March 2, 2004 |
| The invention relates to a process for continuous cooking of wood chips at elevated pressure and temperature in a vertical digester (1) for production of chemically dissolved pulp. Fiber material and cooking liquor are introduced at the top of the digester and pulp is discharged from the |
| 6332950 |
Method in connection with the pretreatment of comminuted fibrous material |
December 25, 2001 |
| A method in connection with the pretreatment of comminuted fibrous material intended for chemical cellulose pulp production. The fibrous material is fed through a low pressure system that has a gas phase part followed by a liquid phase part. The liquid phase part includes a low pressure |
| 6280567 |
System and method for treatment of cellulose-containing material prior to pulp digestion |
August 28, 2001 |
| The invention relates to a process system and a method for preliminary treatment of disintegrated cellulose-containing material, preferably wood chips, prior to pulp digestion. The process system and the method according to the invention make use of a process vessel intended to funct |
| 6254723 |
Method for continuous cooking in a single-vessel digester |
July 3, 2001 |
| In a single-vessel system for continuous cooking of kraft pulp, chips and liquor are conveyed from a high pressure feeder in a transfer line to a first end of a digester. A part of the liquor is separated from the chips that are withdrawn from an outlet defined in an upper part of the di |
| 6007680 |
Apparatus for safely conducting pressurized peroxide bleaching |
December 28, 1999 |
| Apparatus for safely carrying out pressurized peroxide bleaching of pulp in a bleaching vessel at a consistency exceeding 8%, the bleaching vessel designed for at least 0.5 MPa overpressure, with the pulp being pumped to the bleaching vessel through a mixer at a temperature exceeding 90. |
| 5954066 |
Method for controlling chemical reaction |
September 21, 1999 |
| Method for safely carrying out chemical reactions in a vessel having a discharge end, wherein a control valve is provided at the discharge end, and wherein reacted and unreacted chemicals are cleared from in front of the control valve thus reducing the risk of reacted and unreacted c |
| 5900123 |
Device for distributing liquid, especially washing liquid, for washing paper pulp |
May 4, 1999 |
| The present invention relates to a device for distributing liquid, especially washing liquid for washing paper pulp, in a diffuser having at least one screen plate (1), comprising an apparatus for supplying the washing liquid and at least one elongated nozzle (2, 5) which can be conn |
| 5876560 |
Method and apparatus for removing gas from a fibre-liquid suspension |
March 2, 1999 |
| The invention relates to a method and arrangement for removing gas from a fibre/liquid suspension in a fibre treatment line in a pulp mill, which line includes at least one stage in which the fibre/liquid suspension is treated and/or stored in a large container (2) before being conveyed |
| 5858170 |
Method for pressurized peroxide bleaching |
January 12, 1999 |
| The present invention relates to a method for safely carrying out pressurized peroxide bleaching of pulp, at a consistency exceeding 8%, preferably 10-16%, in a bleaching vessel (1), designed for at least 0.5 MPa overpressure, preferably 0.7 MPa overpressure, with the pulp being fed |
| 4280902 |
Separation of dense impurities from a fluid |
July 28, 1981 |
| An apparatus and method for removing dense impurities, such as sand, from a fluid, such as liquids use in the production of cellulosic pulp. A vertically upstanding tank substantially circular in cross-section is provided including a top wall, bottom wall, and side wall. The fluid with |
