| 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 |
| 7501043 |
Steam treatment of chips with the addition of an acid liquid |
March 10, 2009 |
| The method is for the pre-treatment of chips that are fed to a sulphate cooking process. Through the addition of an acidic fluid to the steam treatment step, a very high ionic concentration of hydrogen ions is achieved. When the chips are subsequently formed into a slurry with a pref |
| 7497927 |
Continuous digester with fluid circulation |
March 3, 2009 |
| The arrangement concerns an improved design for at least one of the cooling, dilution and washing at the bottom of a continuous digester for the production of cellulose pulp. By arranging at least one extra strainer section above the lowermost strainer section, with the addition of w |
| 7459058 |
Feed of a mixture of chips and fluid from a low-pressure system to a high-pressure system |
December 2, 2008 |
| Chips are sluiced from a low-pressure section to a high-pressure section with a sluice feeder. The fluid that is used to expel the chips from the sluice feeder principally includes pressurized fluid withdrawn from the treatment vessel. This pressurized fluid is normally withdrawn from th |
| 7445691 |
Impregnation of chips with an acid liquid prior to a sulphate pulping process |
November 4, 2008 |
| The method is for pre-treatment of chips that are fed to a sulphate cooking process. Through acidification of the chips in an acidic treatment fluid with a subsequent draining of free treatment fluid before subsequent steaming or wet-steaming, a high concentration of free hydrogen io |
| 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, |
| 7401718 |
Arrangement for axial feed of a supply hose |
July 22, 2008 |
| The arrangement is for the axial driving of a supply hose (11) for pressure medium or application medium in the form of fluid, gaseous or solid, granule-formed or powder-formed, material. The supply hose (11) is connected to a displaceable cartridge (42) provided with at least one sp |
| 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. |
| 7285179 |
Continuous digester for cellulose pulp including method and recirculation system for such digest |
October 23, 2007 |
| The continuous digester is for producing chemical pulp to a process for operating this digester and to a feedback system for the cooking liquid. By means of implementing cooking zones 1st, 2nd, 3rd, 4th and 5th down through the digester, that have a successively decreasing liquid-to-wood |
| 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 |
| 7270726 |
Method for the production of green liquor |
September 18, 2007 |
| The method is for production of green liquor in association with a causticizing process during recovery of chemicals in manufacture of sulphate pulp. A smelt (14) of chemicals principally consisting of Na2S and Na.sub.2CO.sub.3 from a soda boiler (1) is provided. Weak liquor (15) tha |
| 7270725 |
Pretreatment of chips with white liquor prior to a treatment with black liquor |
September 18, 2007 |
| The method is for the manufacture of cooked cellulose pulp in which the starting material, preferably chips, undergoes a successive increase in temperature towards cooking temperature. This is done while the chips are first treated in a pre-treatment zone in which the main part, greater |
