Matches 101 - 150 out of 226 < 1 2 3 4 5 >


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5478439 Method for feeding cellulose pulp mixture to a pressurized continuous digester  
A system is provided for feeding wood or annual plant chips to continuous digesters for producing paper pulp. The system comprises two stages: in a first, impregnation stage, the chips are...
5472572 Reactor for bleaching high consistency pulp with ozone  
An apparatus and method for bleaching high consistency lignocellulosic pulp using ozone supplied in an ozone containing gas. The bleaching reactor apparatus according to the invention is a...
5451296 Two stage pulp bleaching reactor  
A two stage ozone-pulp bleaching method and apparatus are disclosed. In the first stage, high consistency pulp particles are turbulently mixed and contacted with a gaseous mixture containing ozone...
5405502 Apparatus for treating black liquor  
A simplified method and apparatus for handling black liquor (or other spent liquor from the pulp industry) includes utilization of a mixing tank directly with a black liquor storage tank. The...
5372679 Reactor system for treating cellulosic pulp at a constant upward flow velocity  
A reactor system is disclosed for the treatment of cellulosic pulp in which pulp is distributed upward through a vertical reactor using a unique conical distributor and is discharged using a...
5319902 Mass tower and method of making the same  
A mass tower for medium or high consistency fiber suspension includes a vertically elongated circumferential side wall defining a space for receiving the fiber suspension. The bottom portion of...
5300195 Continuous vertical digester apparatus  
In the continuous cooking of comminuted cellulosic fibrous material (e.g. wood chips) to produce paper pulp, the material is subjected to a minimum of mechanical action, especially under high...
5271672 Apparatus having rotating arms and fluid outlet for treating and discharging a medium  
An apparatus for treating and discharging a medium, such as cellulosic fibrous material, in a container or bleaching tower includes an agitating and treating arm coupled to a rotating discharge...
5266487 Apparatus for the treatment of lignocellulosic materials  
An apparatus is disclosed for treating lignocellulosic materials, comprising an enzymatic conversion zone adapted to enzymatically convert alcohol to aldehyde and hydrogen peroxide, a...
5266159 Mass flow measurement, preferably for controlling chip feed to a digester  
A method and system are provided for controlling the feed of comminuted cellulosic fibrous material (e.g. wood chips) to a continuous digester utilizing a chips meter of variable speed. A quality...
5236553 Continuous cooking with reduced horsepower and pulp degradation  
In the continuous cooking of comminuted cellulosic fibrous material (e.g. wood chips) to produce paper pulp, the material passes upwardly in an impregnation vessel which is within and concentric...
5207870 Process and equipment for pretreatment of cellulosic raw material  
The invention concerns a process for pretreatment of cellulosic chip-formed raw material by impregnation. In the process, first a vacuum treatment is carried out without preceding moistening...
5198075 Digestion method and installation with preheating of lignocellulose materials in solid phase  
A method of digesting lignocellulose materials impregnated with solutions of hydroxides or salts of alkali or alkaline earth metals, the ratio by weight of the solution retained during the...
5169498 Atmospheric pre-steaming chip bin vacuum and pressure relief device  
The proper pressure conditions are maintained within an atmospheric pre-steaming chips bin used in the production of paper pulp. Extending upwardly from the top of the chips bin is a vertical...
5164042 Method and plant for producing high-yield pulp from pulp chip material containing lignocellulose  
In a method of producing high-yield pulp from pulp chip material containing lignocellulose the material is treated with steam in a steam treating station (1) for driving air out of the material...
5120398 Arrangement for discharging pulp from a pulp treatment apparatus  
An arrangement for discharging medium consistency pulp in connection with diffeent pulp treatment devices or apparatuses, the arrangement having a mass chamber, which is arranged between a screw...
5116475 Method for discharging a digester  
A method for discharging cooked lignocellulose materials from a digester is disclosed. After batch cooking the lignocellulose material in the digester is cooled to a temperature of about 100° C.,...
5087326 Rotating pulp bleaching reactor having inner and outer shells and lifting means on the interior surface of the inner shell  
An apparatus for bleaching pulp particles comprising an inner tubular shaped shell member with lifter blades mounted on its internal wall surface. The shell member is rotatably mounted within an...
5059281 Process and mechanism to empty pulping digester  
A batch process and mechanism for cooking fibrous paper pulb including a digester wherein the pulp is cooked under elevated temperatures and pressures for a predetermined time, a discharge line...
5034095 Apparatus and process for the delignification of cellulose pulp  
A cellulose pulp slurry is delignified in an apparatus comprising a vertical cylindrical barrel chamber, a cone-shaped bottom chamber connected to the barrel chamber and having a circular inlet...
4975148 Cold blow system for batch production of pulp  
A method and system for cooling pulp discharged from a batch type digester and recovering heat from it. A stream of pulp together with spent cooking liquor is discharged from a batch digester to a...
4867846 Apparatus for feeding wood chips to a treatment bin  
Apparatus for feeding wood chips and the like into a treatment bin includes a feed tube assembly adapted to lead into the bin at a non-zero angle relative to the horizon. A plate is supported...
4857145 Process for making a pulp from bamboo  
Bamboo can be formed into a suitable pulp if prior to digestion it undergoes a process of shredding, washing and wet depithing. The fibers are then chemically digested preferably by a process...
4838995 Process for bleaching cellulose pulp, a plant for preforming said process, and a screw press for use with said process and plant  
For bleaching cellulose pulp or a fraction thereof, e.g. reject pulp, the cellulose pulp or fraction, having a concentration of 0.5-10%, preferably 3-6%, is introduced into a screw press...
4836893 Apparatus for treatment of fiber material  
A method and apparatus for continuous fiber material treatment of a fiber column without compaction of the column. A liquid layer is disposed between upper and lower treatment zones (i.e. between...
4818295 Cyclone reactor  
A system is provided to produce sugars from a liquid-solid mixture containing biomass, and an acid, wherein the mixture is heated to an appropriate temperature to achieve hydrolysis. The...
4762591 Apparatus for reacting lignocellulosic material with a gas phase comprising a nitrogen oxide and oxygen under controlled gas pressure  
Apparatus for reacting lignocellulosic material with a gas phase comprising a nitrogen oxide and oxygen under controlled gas pressure in the presence of water, for example, as a pretreatment...
4693785 Digester having plural screens and means for controlling the liquid withdrawal  
Comminuted cellulosic fibrous material, such as wood chips, are treated in a continuous digester to produce paper pulp or the like in a manner providing completely uniform treatment of the chips....
4556452 Process and apparatus for producing pulp  
A process and apparatus for producing pulp from impregnated cellulose-containing starting materials such as wood, straw, grass, waste materials etc. in a compacting apparatus comprising a shell...
4529482 Apparatus for the treatment of pulp having oscillating distributing wiper blades  
A diffusion washer and/or thickener assembly is provided that is greatly simplified. A number of withdrawal screens and fluid introducing structures are provided supported by spider arms which...
4491504 Apparatus for treating cellulosic material with a screw feeder extending internally within a treatment vessel  
Cellulosic material, such as wood chips, is fed from a storage bin (10) through a compacting screw feeder (12) to an impregnation chamber (16) in housing (14) wherein the material is contacted...
4431482 Dispersion apparatus for the preparation of waste paper  
A dispersion apparatus for the preparation of waste paper comprises fittings arranged within a housing and composed of a rotor containing ring-shaped concentric rows of teeth and a stator...
4426256 Apparatus for treating fibrous material with a gas  
A method and apparatus provide for the continuous treatment of a porous, fibrous material such as paper pulp, with a gas, such as ozone. The material is entrained with gas and passed in a first...
4372338 High pressure valve assembly  
A high pressure rotary plug valve having at least one groove in the housing to provide a flushing/lubricating flow of innocuous fluid between the housing and rotary plug thus preventing fine...
4317701 Apparatus for treating waste-paper  
Waste paper is chemically and mechanically treated to pulp it into a stock. The waste paper is tumbled, without mechanical beating and without rotary means likely to become fouled by foreign...
4284120 Method and device for transfer of fiber materials transportable by liquids  
There is disclosed a process for the transfer of fiber material from one circuit of circulating liquid to another, where the fiber material is transported by circuits positioned at right angles to...
4239470 Thick stock pump having flexible blades  
A pump for pumping high consistency materials such as paper pulp having a consistency of about 8% or more. The pump includes a pair of rotors disposed in a pumping chamber, and a number of blades...
4238285 Digester system for delivering wood chips in an even layer into a digester  
A batch type digester for wood chips in which a stream of wood chips is delivered into the center of the top of the digester tank, while liquor is being delivered through a pair of pipes at the...
4212705 Apparatus for recovering high pressure steam from a blow tank  
A processing system including a pressurized blow tank for receiving the high pressure discharge from a wood pulp digester and utilizing the digester steam in evaporators or other heat recovery...
4211163 Apparatus for discharge of pressure cooked particulate or fibrous material  
Particulate or fibrous material, after treatment with gaseous reagents in a vessel under pressure in a continuous process, is discharged from the pressure vessel by entering a discharge conduit in...
4174997 Method and apparatus for continuous hydrolysis of cellulosic fiber material  
A method and apparatus for continuously hydrolizing finely comminuted cellulosic fiber material and separately extracting the acid hydrolysate therefrom. Cellulosic material is fed into an upright...
4161421 Method and apparatus for continuous oxygen bleaching of cellulosic pulp  
A method and apparatus for continuous oxygen bleaching of cellulosic pulp is provided utilizing first and second pressurized chambers with a number of tubes in fluid communication with both of...
4158597 Bleaching tower for gas phase bleaching  
An improved tower for gas-phase bleaching of cellulose pulp at high pulp consistency including in series a gas zone space beneath said gas zone for a column of fibrous material, a mixing zone and...
4141784 Method and apparatus for controlling wood chip digester level  
A control system and a process is disclosed for a continuous wood chip downflow digestion system. The system maintains chip level in the top of the digester and maintains a consistency in the...
4138311 Method and apparatus for batch production of pulp including improved energy reclamation  
Cooked pulp at an elevated temperature and pressure is discharged from a plurality of batch digesters sequentially into a first blow tank. The first blow tank is maintained at a substantially...
4135966 Method and device for equalizing the moisture content of porous material  
A process and apparatus for automatically maintaining the moisture content in a continuously conveyed batch of porous materials is described. The porous material is continuously fed through a...
4124440 Chip bin steam distributor with a vibrating discharge  
A chips bin that allows thorough steaming of the chips in the bin without blockage of the chip flow. A chips bin with a vibrating discharge includes an activator cone and a number of support arms...
4121967 Screw conveyor in pulp-making equipment  
A screw conveyor which is particularly used for feeding in and compressing ligno-cellulosic material, such as wood chips, shavings, bagasse, sawdust and similar compressable material. The screw...
4104113 Two-stage digestion with between vessel heating  
An apparatus and method for the digestion of cellulosic fiber material providing pulp of very uniform quality. Cellulosic fiber material entrained in treatment liquid is fed into a top portion of...
4096027 System for presteaming wood chips at or near atmospheric pressure with minimum displacement of air  
A method and apparatus for presteaming of wood chips and the like. The chips are treated in a vertical presteaming vessel with steam under low pressure, and removal of the air from the chips is...

Matches 101 - 150 out of 226 < 1 2 3 4 5 >