Class / Patent application number | Description | Number of patent applications / Date published |
162052000 | Charging and/or discharging fibrous material | 10 |
20080271860 | METHOD AND APPARATUS TO DISTRIBUTE THE INFLOW OF LIQUORS IN BATCH DIGESTER - Method and apparatus for introducing liquors into a batch digester to produce enhanced or plug-flow of the liquors through the bed of cellulosic material. Wash out liquor can be introduced into the digester during the discharging of delignified cellulosic material in a manner to add wash out liquor into the digester in order to maintain consistency of the delignified cellulosic material and to prevent formation of a vortex of delignified cellulosic material during discharge. | 11-06-2008 |
20090078382 | Arrangement and Method for Treatment of Cellulose Pulp Involving Means for Seal Adjustment - A washing arrangement for washing and dewatering of cellulose pulp is disclosed, comprising a rotatable drum having a plurality of outer compartments defined by axial compartment walls distributed along the circumference of the drum, a stationary cylindrical casing that encloses the drum, whereby an annular space is defined between the casing and the drum and longitudinal seals extending in the axial direction of the drum divide the annular space into zones for forming, washing and discharge of the pulp. The function of the longitudinal seals is optimized by units for seal adjustment having force sensors for measuring a force acting on one of the longitudinal seals in the direction from the drum, and positioners for automatically moving the longitudinal seal substantially in the radial direction of the drum according to a predetermined pattern based on the measured force. | 03-26-2009 |
20090084511 | Method and Apparatus for Processing Wood Chips - A method and an apparatus for processing wood chips, wherein the wood chips are treated with steam in a gas removal apparatus. The condensate formed in the gas removal apparatus is removed from the gas removal apparatus and the wood chips are treated with a processing solution in order to remove metal ions from the wood chips. Condensate formed in the gas removal apparatus is used as processing solution. | 04-02-2009 |
20090090477 | FEEDER - A fluid transfer apparatus for bulk material is disclosed. The transfer apparatus includes a rotor mounted on a rotatable shaft and including axially extending flow channels extending through the rotor parallel to the shaft, flow connectors for connecting a low-pressure flow of fluid and a high-pressure flow of fluid into and out of the axially extending flow channels, a casing enclosing the rotor, a pair of axially sealing plates disposed between the ends of the rotor and the casing, a pressurizing fluid fed into the chamber defined by the casing to pressurize the rotor, the flow connectors, and the axially movable sealing plates. | 04-09-2009 |
20090095430 | TREATMENT VESSEL FOR STRAW OR OTHER LIGHT BULKY MATERIAL - A method to chemically treat light weight, bulky cellulosic material including: introducing the material to an upper inlet of a substantially vertical treatment vessel; maintaining the material in the vessel at a pressure of at least 20 bar and at a temperature of at least 200° C.; treating the material with a cooking liquor in the vessel; moving the material past at least one anti-compression ring on an inside surface of the vessel, as the material moves downward through the vessel; agitating the material in the vessel, and discharging the treated material from a lower discharge port of the vessel. | 04-16-2009 |
20100314055 | COMPACT FEED SYSTEM AND METHOD FOR COMMINUTED CELLULOSIC MATERIAL - A feed system for a comminuted cellulosic material including: a chip bin having an upper chip inlet, an interior chamber oriented generally vertically and a lower discharge port; at least one liquor inlet to the chip bin to inject liquor in the chip bin, wherein the chip bin retains sufficient liquor and chips within the interior chamber to create a hydraulic pressure on the chips at the lower discharge port; a generally horizontally oriented chip conveyor or tube coupled to the lower discharge port to receive the chips and liquor from the bin under the hydraulic pressure, wherein the conveyor or tube includes liquor injectors which inject liquor into the chips and the conveyor or tube, and a high pressure transfer device coupled to a discharge of the conveyor or tube to receive the chips and liquor, whereby the hydraulic pressure of the chips and liquor at the discharge of the chip bin is sufficient to feed the chips and liquor to the high pressure transfer device. | 12-16-2010 |
20120031574 | CHIP FEED AND STEAMING SYSTEM AND METHOD FOR BATCH DIGESTER - A method for chemically digesting cellulosic fibrous material including: adding a liquor to cellulosic fibrous material to form a slurry in a chip feed system; transporting the slurry from the chip feed system to a batch digester vessel; determining when a chip level rises above an extraction screen in the batch digester vessel; after the chip level rises above the extraction screen, extracting liquor from the batch digester vessel while the transport continues of the slurry into the batch digester vessel; adding cooking liquor to slurry in the batch digester vessel; ceasing the transport of the slurry into the batch digester vessel and thereafter converting the cellulosic material in the vessel to a pulp, and discharging the pulp from the batch digester vessel before restarting the transporting of the slurry into the digester vessel. | 02-09-2012 |
20120227918 | REFINER STEAM SEPARATION SYSTEM FOR REDUCTION OF DRYER EMISSIONS - A refiner steam separation system according to the present invention includes a blowline for transporting a mixture of fiber material from a refiner to an inlet of a steam separator. Waste steam is discharged from the separator through a waste steam outlet. Cleaned fiber material is discharged from the separator through an exit, which prevents a substantial portion of the waste steam from passing through the exit. A relay pipe communicates with the exit and a dryer duct, and transports cleaned fiber material therebetween. A resin input communicates with the relay pipe, and supplies resin therein. The resin is mixed with the cleaned fiber material prior to the cleaned fiber material being dried in the dryer duct. The present invention is also directed to a method of reducing VOC emissions generated during refining cellulosic fibrous material. | 09-13-2012 |
20140069598 | METHOD AND ARRANGEMENT FOR ADDING TREATMENT LIQUORS TO CELLULOSE MATERIAL IN A DOWN FLOW VESSEL - The method and arrangement are for adding treatment liquid to comminuted cellulose material, preferably wood chips, during the manufacture of chemical pulp in a continuous process. The process is using a down-flow vessel wherein chips are descending down the vessel in a plug flow and wherein treated chips are continuously fed out at the bottom of the vessel. By arranging at least one telescopic pipe inside the vessel that extends down into the plug flow makes it possible to adjust the position for the addition of treatment liquid depending on current operational parameters. | 03-13-2014 |
20140138039 | FEEDING SYSTEM COMPRISING PUMPS IN PARALLEL FOR A CONTINUOUS DIGESTER - The feed system is for a continuous digester where at least two pumps are arranged in parallel in the bottom of a pre-treatment vessel and a liquid level of at least 20 meters is established. The system makes it possible to provide a feed system with an improved accessibility and more reliable operation, and to operate the main part of the pumps at optimal efficiency even if the production capacity is reduced. | 05-22-2014 |