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8916023 Vapor phase hydrolysis vessel and methods related thereto  
A prehydrolysis of wood chips or other lignocellulosic material in a vessel having a gaseous portion and a liquid portion. The vessel includes at least one stress relieving piece that inhibits...
8888954 Feeding system having pumps in parallel for a continuous digester  
The feed system is for a continuous digester where at least two pumps are arranged in parallel at the bottom of a pre-treatment vessel and a stirrer is provided in direct connection to inlets to...
8852395 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...
8801898 Method and arrangement for adding treatment liquors to cellulose raw material in a continuous process using down flow vessels  
The method and arrangement is for adding treatment liquor to comminuted cellulose material, preferably wood chips, during the manufacture of chemical pulp in a continuous process. The process uses...
8647473 Continuous digester with a bottom scraper equipped with draining apertures  
The continuous digester is for producing pulp from comminuted cellulosic material. The digester has a cone diverter on a bottom scraper arranged in the bottom of the digester for assisting in out...
8647469 Method, system and withdrawal screen section for impregnating chips  
The method, system and a withdrawal screen section are for the impregnation of chips during the manufacture of chemical pulp. Chips are both steamed and impregnated in a low pressure impregnation...
8512512 System and method for preextraction of hemicellulose through using a continuous prehydrolysis and steam explosion pretreatment process  
A method including: pretreating biomass feed stock in a first pressurized reactor, wherein the feed stock undergoes hydrolysis in the first pressurized reactor; discharging the feed stock from the...
8377261 High pressure sluice feeder  
The high pressure sluice feeder has a conical rotor mounted in a housing having a complementary conical interior. The rotor has a plurality of trough-going pockets arranged offset to each other in...
8366876 Method and arrangement for improving a washing step after completed cooking in a continuous digester  
The method and an arrangement are for the improvement of a wash after completed digestion in a continuous digester for the production of cellulose pulp. The softened chips are exposed to a...
8366875 Method and arrangement for wash after completed digestion in a continuous digester for the production of cellulose pulp  
Digested softened non-defibrated chips are fed out from a bottom of a digester. The chips are fed out under an influence of a bottom scraper at the bottom of the digester and through an outlet tap...
8197639 Vapour phase digester and a method for continuous cooking  
The system and method reduce the liquid/wood ratio at the top of a vapor phase digester in a continuous digester plant. Chips that are to be cooked in the vapor phase digester are fed as a mixture...
8157964 Installation for implementing a method for producing paper pulp, lignins and sugars and production method using such an installation  
The invention proposes an installation (10) in which the impregnation and fractionation of the raw material (MP) are conducted at atmospheric pressure, characterized in that it comprises means...
8088253 Digester screen for a continuous cellulose pulp digester  
The digester screen is for a continuous digester in which cooked cellulose pulp is produced. The digester screen has a number of screen bars arranged vertically in the continuous digester that...
7988788 Process for rapid acid hydrolysis of lignocellulosic material and in a hydrolysis reactor  
Improvements in a process for rapid acid hydrolysis of lignocellulosic material and in a hydrolysis reactor, said lignocellulosic material being fed in different levels of a reactor and contacted...
7976675 Continuous digester system  
In a continuous digester system the digester system is greatly simplified by using a single vertical atmospheric vessel, replacing the conventional chip bin, steaming vessel, chip chute, high...
7918967 Apparatus for decreasing scaling in digester systems  
The invention relates to an apparatus for continuous digestion of wood chip comprising an upright generally cylindrical vessel having a top end and a bottom end. The top end of the cylindrical...
7871491 Method and arrangement for continuous cooking  
The continuous digester system has an inlet defined therein for the feed of a chips suspension and an outlet for the output of a cooked suspension of pulp. The suspension of chips is fed in to the...
7867363 Continuous digester system  
In a continuous digester system the digester system is greatly simplified by using a single vertical atmospheric vessel, replacing the conventional chip bin, steaming vessel, chip chute, high...
7837834 Method and device for the continuous cooking of pulp  
The continuous digester system has an inlet defined therein for the feed of a chips suspension and an outlet for the output of a cooked suspension of pulp. The suspension of chips is fed in to the...
7736467 Screen assembly for a pulp digester  
A pulp digester includes a vessel having an inlet, an outlet and a wall extending between the inlet and the outlet, the wall of the vessel having a curved interior surface. The digester includes a...
7713383 Arrangement for feeding a slurry of chips and liquid  
The method and arrangement is for the feed of a chips suspension from one vessel to a subsequent digester in a continuous cooking process for the production of chemical cellulose pulp. The vessel...
7686919 Method and device for the continuous cooking of pulp  
The continuous digester system has an inlet defined therein for the feed of a chips suspension and an outlet for the output of a cooked suspension of pulp. The suspension or chips is fed in to the...
7615134 Method and arrangement of impregnating chips  
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...
7604711 Method to optimize temperature profiles displacement batch cooking  
Method and apparatus for batch displacement digester systems to increase tank farm vessel temperatures for more efficient delignification rates by mitigating the formation of flow channels in the...
7547374 Method for impregnating chips in a continuous digestion system  
A method for impregnating chips in a continuous digestion system with an impregnation vessel and a digester. The digestion system has a heat exchanger arranged between a first return line and a...
7309401 Top separator for gas phase and hydraulic phase continuous digesters and method for converting digester  
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...
7285179 Continuous digester for cellulose pulp including method and recirculation system for such digester  
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,...
7241363 Methods to decrease scaling in digester systems  
One aspect of this invention relates to a method and digester for reducing the deposition of calcium-based scale in a wood chip digester including extraction from the digester of first and second...
7229524 Feeding arrangement for feeding of chips to chip bins  
The invention relates to a feed arrangement for feeding chips to chip bins (1) in the production of cellulose pulp in continuous digesters (16), in which the chip bin is constituted by a treatment...
7156952 Method and arrangement for oxygen delignification of cellulose pulp  
The invention relates to a method and arrangement for alkaline oxygen delignification of cellulose pulp. By adding alkali in the final phase of the oxygen delignification one can ensure that an...
RE39208 Method of treating material in a continuous digester  
A comminuted cellulosic fibrous material treatment vessel assembly includes a substantially vertical vessel having a top, bottom, and outlet, and through which the material flows in a flow...
7060162 Chip bin  
A chip bin for a digester has an upper part through which chips fall freely from an inlet and a lower part within which the chips remain until they are fed to a digester. Steam orifices strike...
6966970 Method for supplying washing liquid to a process for cooking cellulose pulp  
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...
6958110 Apparatus for the production of cellulose paper pulps by biodelignification of vegetative masses  
Apparatus for the production of cellulose paper pulps from vegetative masses, comprising: a tower for sterilizing the mass to form a culture medium; a first screw for mixing the sterilized mass...
6841042 Feeding comminuted fibrous material using high pressure screw and centrifugal pumps  
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,...
6808596 System for the oxygen delignification of pulp consisting of lignocellulose-containing material  
The system is for the oxygen delignification, in at least two reaction stages, of pulp that consists of lignocellulose-containing material having a mean concentration of 8%-18% pulp consistency....
6582554 Continuous digester having a sectioned top separator with multiple liquor extraction ports  
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...
6569289 Cellulose slurry treating systems for adding AQ to a cellulose slurry in the substantial absence of alkali  
Chemical pulp is produced from a slurry of comminuted cellulosic fibrous material using a beneficial additive such as AQ, or polysulfide. In the first treatment zone the effective alkali...
6447645 Feeding cellulose material to a treatment vessel  
A feed system for a cellulose pulp treating vessel (such as a continuous digester) is not limited by the required L/W ratio of the pump feeding a wood chip slurry to a high pressure transfer...
6379504 Apparatus for pulping sawdust  
Chemical cellulose pulp is made from sawdust utilizing a static down-flow retention vessel. By adding steam and cooking liquor to a flow of sawdust a heated slurry, at a cooking temperature of...
6344112 Screen having inclined slots for a digester  
A screen used in the production of cellulose pulp may be mounted in a digester to minimize traditional screen problems (including clogging) without introducing new problems. The screen comprises a...
6174411 Continuous digester with inverted top separator  
A cellulose pulp continuous digester (e.g. for producing kraft pulp) is operated so that it has an inverted top separator and is hydraulically filled to above the level of the inverted top...
6129816 Tapered screen assembly for a cellulose pulp digester  
A comminuted cellulosic fibrous material treatment vessel assembly includes a substantially vertical vessel having a top, bottom, and outlet, and through which the material flows in a flow...
6120646 Feeding system of feeding a cellulose material  
A feeding system for feeding comminuted cellulose containing material and liquid to a continuously operating treatment vessel. The feeding system comprises a chute, operating at a first pressure,...
6109312 Air evacuation insert for wood chip digester  
An insert is bolted to the inlet of a wood chip digester to provide air exhaust during chip loading, and over pressure relief during chip processing. The insert has an upper flange which connects...
6039841 Screen having inclined slots for use in a continuous digester  
A screen used in the production of cellulose pulp mounted in a digester minimizes traditional screen problems (including clogging) without introducing new problems. The screen comprises a screen...
6024837 Low temperature gas phase continuous digester  
A cellulose pulp continuous digester (e.g. for producing kraft pulp) is operated so that it has the advantages of a hydraulic digester yet has a gas-filled zone over the liquid level. A slurry of...
5919337 Method of continuously isothermally cooking of pulp  
The present invention relates to a digester for continuous cooking, under elevated pressure and temperature, of fibre material in a vertical digester (1), where fibre material and cooking liquid...
5795438 Method and apparatus for feeding multiple digesters  
A number of distinct parallel digesters are fed with chips from a common steaming vessel. After steaming the chips are slurried and pressurized, and substantially simultaneously the steamed,...
5783037 System and method for operating a pulp mill  
A pulp mill includes a digester which contains a raw material, a digesting medium, and a source of steam. Oxygen is injected into the steam line, at a point which minimizes exposure of the oxygen...

Matches 1 - 50 out of 206 1 2 3 4 5 >