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| Number | Title | Issue Date |
| 8163137 | Apparatus for cleaning and/or cooling a liquor gun in a chemical recovery boiler An apparatus for cleaning and cooling a liquor nozzle, the nozzle including at least a liquor tube for feeding liquor and chemicals into a furnace of a recovery boiler. The apparatus includes an outer casing tube, which defines a space whereto conduits are provided ... | 04/24/2012 |
| 8157967 | Arrangement in connection with screening apparatuses An arrangement in screening apparatuses of the pulp and paper industry, including a conduit for removing reject formed in a screening process. The circulation of material is arranged between the reject removal conduit and the interior of the screening apparatus from... | 04/17/2012 |
| 8157966 | Apparatus for removing gas in connection with a paper machine or corresponding An apparatus in connection with wire water treatment in the approach system of a paper machine, board machine or corresponding web formation machine, which apparatus includes a deaeration tank connected to devices for generating a vacuum inside the deaeration tank. ... | 04/17/2012 |
| 8070083 | Method and apparatus for processing logs The present invention relates to a method of processing logs by means of an apparatus comprising a transportation level in the advancing direction (P) of the logs, where they are arranged to be transported in a position perpendicular to their advancing direction (P)... | 12/06/2011 |
| 8052839 | Apparatus and method for washing pulps An apparatus for treating pulp including: at least one liquid-permeable surface rotating around a shaft, onto which surface a pulp layer is formed; a feeder to feed pulp to the apparatus for treatment on the liquid-permeable surface; an internal barrier defining a f... | 11/08/2011 |
| 8048270 | Apparatus for distributing a pulp flow An apparatus for distributing a pulp flow, said apparatus including: a valve body connected to an inlet conduit and an outlet conduit for the pulp flow and provided with a closing member for opening and closing the valve to regulate the pulp flow; a distribution mem... | 11/01/2011 |
| 8020594 | Debarking mechanism The invention relates to a debarking mechanism (1) for the decortication or pretreatment of logs (2) for separately performed final debarking and for the discharge of at least some of the bark removed from a wood stream passing through the debarking me... | 09/20/2011 |
| 8002994 | Method and apparatus for thickening lime mud in a disc filter 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 l... | 08/23/2011 |
| 7988820 | Method for cleaning and/or cooling a liquor gun in a chemical recovery boiler An apparatus for cleaning and cooling a liquor nozzle, the nozzle including at least a liquor tube for feeding liquor and chemicals into a furnace of a recovery boiler. The apparatus includes an outer casing tube, which defines a space whereto conduits are provided ... | 08/02/2011 |
| 7951263 | Method and apparatus for treating pulp A method of dividing a suspension, especially a fiber suspension into an accept fraction and a fraction containing impurity particles in a centrifugal cleaning plant having at least two stages. The suspension is fed to a preceding stage, wherefrom a heavier fraction... | 05/31/2011 |
| 7931152 | Shuffling apparatus and method for aligning wood logs in a conveyor A log shuffler and conveyor assembly including: a chute including a log conveyor having a bottom surface and at least one sidewall; a gap in the log conveyor, and a log shuffler arranged in the gap of the conveyor, wherein the shuffler includes at least one pivoting... | 04/26/2011 |
| 7831084 | Control of a recovery boiler or alike Method and system for controlling the operation of a recovery boiler or another boiler having a furnace wherein the operation is monitored by monitoring sensors, the sensors converting the acquired electromagnetic radiation to electrical signals which are conducted ... | 11/09/2010 |
| 7661376 | System for producing energy at a pulp mill A spent liquor recovery boiler system including a boiler having a water/steam circulation system with superheaters and a furnace for recovering energy and chemicals from spent liquor combusted therein, the walls of the boiler are formed of a plurality of water-coole... | 02/16/2010 |
| 7640750 | Apparatus and method for producing energy at a pulp mill A spent liquor recovery boiler in the pulp and paper industry including a water/steam circulation system having superheaters, the circulation system connected to a steam turbine comprising a high-pressure part, and a furnace for burning spent liquor to produce flue ... | 01/05/2010 |
| 7628964 | Apparatus for treating lime mud A method for feeding lime mud into a lime kiln including a rotary kiln shell having an interior between a first end wall and a second end wall, the method including: feeding the lime mud into a flue gas flow in the interior of the rotary kiln shell or in close proxi... | 12/08/2009 |
| 7569200 | Method for reducing nitrogen oxide emissions The present invention relates to a method for reducing nitrogen oxide emissions in combustion. Fuel is combusted in a first zone, whereby nitrogen oxides are generated. Supplementary fuel is fed in another zone under reducing conditions. At the same time, the temper... | 08/04/2009 |
| 7556071 | Debarking mechanism A debarking mechanism including a number of rotatable debarking shafts extending parallel to an advancing direction (A) of the trees to be fed therethrough, which are provided with a number of teeth extending beyond the circumferential surface of the shaft and the d... | 07/07/2009 |
| 7501042 | Method and arrangement in connection with a chemical recovery boiler The present invention relates to a method in connection with smelt removal form a recovery boiler, whereby the smelt is removed from the boiler via a smelt spout surrounded outside the boiler by a hood and a dispersion medium, preferably steam, is fed into the smelt... | 03/10/2009 |
| 7328808 | Apparatus for sorting wood chips in separate fractions The invention relates to an apparatus for sorting wood chips, said apparatus having a feeder for supplying the wood chips onto a sloping support surface so that the chips slide along the support surface and over a slit extending across the support surface. A flow of... | 02/12/2008 |
| 7267146 | Chipper bed knife The invention relates to a chipper (1) bed knife (2) attached detachably to the chipper frame (3), the chipper (1) having a chipper disc (5) supported on its shaft (4), which shaft is fitted rotatably to the chipper frame ( | 09/11/2007 |
| 7207280 | Combustion air system for recovery boilers, burning spent liquors from pulping processes An arrangement is disclosed for supplying an air jet form to the furnace of a recovery boiler, where the furnace has a front wall, a rear wall and side walls. Black liquor spraying devices are disposed on the furnace walls at one or several levels of the furnace. A ... | 04/24/2007 |
| 7143899 | Filter element and method for manufacturing the plates thereof A filter element for pulp screens comprising at least two plates separated by a distance from each other, wherein one plate has a number of projections formed thereon, and the projections being directed towards the other plate. The plates are attached to each other ... | 12/05/2006 |
| 7128216 | Closed air circulation system The invention relates to a closed air circulation system for an apparatus used for sorting wood chips, containing chips in a variety of sizes and/or fines particles, in a wood chips processing chamber, in separate fractions by means of a gas flow, which is delivered... | 10/31/2006 |
| 7070677 | Method and apparatus for treating pulp with filler The present invention relates to a method of and apparatus for treating pulp with filler. The method and apparatus according to the invention are especially well suitable for treating pulp with filler, the mixing of which to the pulp requires simultaneous treatment ... | 07/04/2006 |
| 6978899 | Apparatus for sorting wood chips in separate fractions An apparatus for sorting wood chips includes a feeder for supplying wood chips onto a sloping support surface to slide along the support surface over a slit extending thereacross. The slit is configured to provide an impulse action by means of a continuous gas flow ... | 12/27/2005 |
| 6797125 | Method of treating condensates The present invention relates to a method of treating condensates containing compounds, which are more volatile than water, in an evaporation plant, where liquid, such as effluent liquid from a pulp or paper mill is evaporated in multiple effects and where condensat... | 09/28/2004 |
| 6776876 | Method of treating cellulosic pulp to remove hexenuronic acid Chemical cellulose pulp produced by alkaline delignification and having a kappa number of under 24 (e.g. 14 or below) having hexenuronic acid is treated to remove at least 50% of the hexenuronic acid (e.g. 90-97%) such as by treating the pulp at a temperature over 8... | 08/17/2004 |
| 6767432 | Apparatus for the thickening of fiber suspensions The present invention relates to the thickening of pulp suspensions. A low consistency pulp suspension is fed to a pre-thickener (10) through an inlet conduit (18). A layer of thickened pulp, formed on a filter surface (22), is pushed along the ... | 07/27/2004 |
| 6742463 | Combustion air system for recovery boilers, burning spent liquors from pulping processes An arrangement is disclosed for supplying an air jet form to the furnace of a recovery boiler, where the furnace has a front wall, a rear wall and side walls. Black liquor spraying devices are disposed on the furnace walls at one or several levels of the furnace. A ... | 06/01/2004 |
| 6736934 | Method of pretreating pulp in an acid tower prior to bleaching with peroxide The present invention relates to a method of pretreating, by acidification and chelation, of pulp to be bleached with peroxide. Especially, the invention relates to intensifying, and at the same time simplifying the pretreatment required by peroxide bleaching. It is... | 05/18/2004 |
| 6736937 | Method and apparatus for controlling the operation of the short circulation of a paper, paperboard or the like production machine The present invention relates to a method of and an apparatus for controlling the operation of the short circulation of a paper, paper board or the like production machine. The method and apparatus according to the invention are especially preferably suitable for us... | 05/18/2004 |
| 6733629 | Method of controlling the operation of an approach system of a paper machine or the like web formation apparatus The present invention relates to a method and apparatus for controlling the operation of an approach system of a paper machine or the like web formation apparatus. Especially preferably the method of controlling the operation of an approach system according to the i... | 05/11/2004 |
| 6733625 | Method and apparatus for treating pulp The present invention relates to a method of treating chemical pulp in order to optimize the consumption of bleaching chemicals and to improve the quality of the pulp. Especially the invention relates to a method according to which filtrate obtained from a suitable ... | 05/11/2004 |
| 6730193 | Wire pit The present invention relates to a wire pit. A characteristic feature of the wire pit (50) according to the invention is that its wall/walls (52′, 52″, 54′, 62) converge downwards so that the average flow direction of the liquid along the most pa... | 05/04/2004 |
| 6719145 | Arrangement and rotor for screening of pulp An arrangement and a rotor for screening of pulp is disclosed that is suitable for the screening of chemical and mechanical pulps, i.e. fiber suspensions of the wood processing industry. A feature of the arrangement and rotor is that inside the rotor (16) the... | 04/13/2004 |
| 6647726 | Method and arrangement for producing electrical energy at a pulp mill The invention relates to a method and an arrangement in the production of electric energy in a boiler plant of a pulp mill. Black liquor having a dry solids content of more than 80% and combustion air are fed into a furnace of a recovery boiler for combus... | 11/18/2003 |
| 6605184 | Method and apparatus for treatment of fiber suspension containing minerals, such as coated broke, in paper production A method and apparatus treat fiber based material so as to reduce the loss of mineral fractions in the treatment of broke in paper production. Broke is a reusable raw material from a paper machine that contains mineral fractions which are desirably return... | 08/12/2003 |
| 6582601 | Method and apparatus for separating soap A method and apparatus for separating soap from liquor in a filtrate tank are particularly well suited for treating soap-containing filtrates from digester houses, bleach plants, and washer rooms in the chemical pulp processing industry. A device is dispo... | 06/24/2003 |
| 6579411 | Bleaching medium consistency pulp with ozone A method of bleaching cellulose pulp with ozone includes pumping cellulose pulp in form of a fiber suspension having a consistency range of 5 to 25% with a high-consistency pump to a fluidizing Mixture in which oxygen and ozone containing gas is introduce... | 06/17/2003 |
| 6578529 | Arrangement for feeding black liquor into a recovery boiler The present invention relates to an arrangement for introducing black liquor into a furnace of a recovery boiler, said arrangement comprising an elongated tube having an interior surface and an exterior surface, through which tube the black liquor being f... | 06/17/2003 |
