96results about "Fibrous raw materials" patented technology

The invention relates to the technical field of gypsum fiberboard raw material treatment, in particular to a plant fiber for a gypsum fiberboard and a preparation method and application thereof. Compared with the prior art, the preparation method provided by the invention adopts specific process steps, plant fiber raw materials are softened by using a supersaturated calcium hydroxide solution to partially remove lignin, the treated plant fiber slurry is introduced into a sulfuric acid solution for neutralization in the water washing process, and generated nano-scale calcium sulfate particles are attached to the surfaces of the plant fibers, so that the surface of the plant fibers is uniform. The plant fiber coagulant plays a role of a coagulant during production of the gypsum fiberboard, and the plant fiber meeting the requirements of production of the gypsum fiberboard is prepared. The preparation method provided by the invention is low in cost, and the gypsum fiberboard prepared from the obtained plant fiber for the gypsum fiberboard has relatively high mechanical property indexes and meets the performance requirements of boards for building decoration.

The present application relates to pulping technology field, the present application provides a kind of high-strength high-cleanliness chemical pulp's pulping process, with bamboo willow edge scrap as fiber raw material, after 1 stage pre-steaming, chip washing, dehydration, 2 stage pre-steaming;The wood chip material after 2 stage pre-steaming is 1 stage extrusion and is dissolved, 1 stage chemical liquid pre-impregnation, 2 stage extrusion and is dissolved, 2 stage chemical liquid pre-impregnation;1 stage chemical liquid pre-impregnation uses sodium hydroxide solution and does not use hydrogen peroxide, the chemical reagent of 2 stage chemical liquid pre-impregnation process is sodium hydroxide, hydrogen peroxide and sodium silicate;Material after 2 stage chemical liquid pre-impregnation is 1 stage refining, separation, cooling, 1 stage high-concentration bleaching, 1 stage dehydration, 2 stage high-concentration bleaching, 2 stage dehydration;Pulp after 2 stage dehydration is latent, refining etc., and the finished product is prepared.This application process can produce high-strength, high-cleanliness chemical pulp, and the pulp cost is lower, and the pulp quality is better, and it is beneficial to high-end cultural paper etc. application.

The application discloses a hot mill grinding piece based on a heart curve and a design method thereof, and belongs to the technical field of hot mill grinding pieces. The design method of the hot mill grinding piece based on the heart curve comprises the following steps: S1, determining an inner circle radius R1 and an outer circle radius R2 of the hot mill grinding piece; S2, determining an origin of the heart curve as a center O of the hot mill grinding piece; S3, defining an arbitrary point P on the heart curve, a grinding tooth starting point P1, a grinding tooth ending point P2, a rotary radius p1 of the grinding tooth starting point, a sliding angle a of the arbitrary point on the heart curve, and a polar angle theta of the arbitrary point on the heart curve; and S4, obtaining a heart curve equation of the hot mill grinding piece. The hot mill grinding piece provided by the application can improve fiber separation quality, reduce energy consumption and prolong tool life. The design method of the hot mill grinding piece based on the heart curve designs a grinding tooth profile of the hot mill grinding piece as a curve function, which is convenient for design expression and mathematical analysis of tooth blade stress.

There is provided a bleached high temperature chemithermomechanical pulp and a method for producing said HT-CTMP comprising the steps: a) providing wood chips comprising softwood, hardwood or mixtures thereof; b) impregnating the wood chips with an impregnation liquid comprising NaOH and / or Na2SO3 to obtain impregnated chips; c) transferring the impregnated chips to a heating zone without compressing the impregnated chips; d) heating the impregnated chips in the heating zone with steam having a temperature of above 140 °C, such as at least 150 °C, such as at least 160 °C, to obtain pre-treated chips; e) defibrating the pre-treated chips to obtain a pulp; f) bleaching the pulp to obtain a bleached pulp; and g) refining the bleached pulp at a consistency of 3-8 wt. % to obtain bleached HT-CTMP.

The present invention relates to a method and an apparatus (1) for dry manufacturing rigid cellulose product (2) having essentially non-flat general shape from a cellulose blank (10). The method comprises the steps of providing a cellulose pulp sheet (7), disintegrating the cellulose pulp sheet (7) in order to generate a quantity of separated cellulose fibres, forming a cellulose blank (10) in the cellulose blank forming unit (9), transferring the cellulose blank (10) to a product forming unit (11), and producing rigid cellulose products (2) in the product forming unit (11), wherein the product forming unit (11) comprises heating means for heating the cellulose blank (10) to a forming temperature T, the product forming unit (11) comprising a moulding tool having a first mould part (15) and a second mould part (16), wherein the heated cellulose blank (10) is pressed between the first mould part (15) and the second mould part (16) by applying a forming pressure P in the axial direction of the moulding tool. The primed cellulose pulp sheet (7) has an added barrier dispersion (34) that comprises deionized water (35), a barrier additive (36), including water, a barrier agent and a cationic stabilizer, and a wet strength additive (37), including water, and a wet strength agent, wherein the total amount of barrier agent, cationic stabilizer and wet strength agent is in the range 5-20 wt% of the barrier dispersion (34), the ratio between the wet strength agent and the barrier agent being in the range 1:2 - 2:1.

A refiner disc of a refiner (100) for refining of lignocellulosic material, said refiner disc (30) having an active surface (1; 1') comprising a pattern of bars (10) and grooves (20) disposed in a number of pattern areas (41; 41'), wherein said pattern areas (41; 41') are positioned side by side with each other to cover at least a part of the active surface (1; 1'). Each of said pattern areas (41; 41') has a length, l, extending between a first end (43a) and a second end (43b) of the pattern area (41; 41') and a width, w, extending between two side edges (45a, 45b) of the pattern area, wherein a distance between the two side edges (45a, 45b) is smallest in the first end (43a) of the pattern area (41; 41') and is increasing towards the second end (43b) of the pattern area. Each of said pattern areas (41; 41') is positioned on the active surface (1; 1') such that a centre line, c, of the pattern area (41; 41') is provided at an angle, p, to a radius, R, of the refiner disc (30), said angle, p, being between 10-60°.

The present invention relates to a system and a method for recovering microfibers contained in a liquid effluent (L) from a textile treatment device. The system comprises at least one device for dissolving a gas (2, 4, 10, 20, 30, 5) directly into at least a portion of the liquid effluent (L) by pressurization and a device for separation by dissolved gas flotation (5, 6, 7, 40, 50, 60, 61, 62) connected together. The device for separation by dissolved gas flotation (5, 6, 7, 40, 50, 60, 61, 62) further comprises means for collecting (60, 61, 62) the microfibers (MF) from the surface of the liquid effluent (L) contained within its enclosure (50). Figure 1 to be published

The invention relates to a cyclone separator for separating fiber material from a fiber material-steam mixture, to a system for processing fiber material, and to a method for operating a cyclone separator, wherein the cyclone separator is designed such that a discharge of fiber material via a fiber material outlet and a co-discharge of steam via the fiber material outlet can be controlled in an improved manner. By means of a conical element which fits in the outlet space which correspondingly widens conically toward the fiber material outlet, the gap width of the annular gap between the conical element and the outlet space inner wall, which circumferentially delimits the outlet space, can be adjusted very simply via a relative movement between the conical element and the outlet end portion.

The application provides a low-temperature and clean pulping method of wheat straw biomechanical pulp, and relates to the field of low-temperature wheat straw biomechanical pulp. The low-temperature and clean pulping method of the wheat straw biomechanical pulp comprises the following steps: extrusion and wire twisting, first pre-steaming, first mechanical treatment, second pre-steaming, second mechanical treatment and post-treatment. The low-temperature and clean pulping method of the wheat straw biomechanical pulp can effectively reduce steam consumption, improve treatment efficiency, increase yield, improve pulping uniformity, avoid water treatment defects and loss of fine fibers in the pulping process, reduce treatment cost, and improve the cleanliness and environmental protection of pulping.

A refining segment (4) for a refiner (1) for refining lignocellulose-containing fibrous material. The refining segment comprises an inner end edge (20) and an outer end edge (21) opposite to the inner end edge, and a refining surface (5) comprising refining bars (25) and refining grooves (26) therebetween. The refining surface comprises at least one recess (27, 27', 27") extending from the outer end edge of the refining segment at least partly towards the inner end edge for forming at least partly at least one backflow guide groove (28) extending from the outer end edge of the refining segment at least partly towards the inner end edge. A volume of the at least one recess is arranged to decrease towards the inner end edge for providing the volume of the at least one backflow guide groove to decrease towards the inner end edge.

The invention provides a low-temperature clean pulping method of wheat straw bio-mechanical pulp, and relates to the field of low-temperature wheat straw bio-mechanical pulp. The low-temperature and clean pulping method of the wheat straw biological mechanical pulp comprises the following steps: extruding and thread rolling, first pre-steaming, first mechanical treatment, second pre-steaming, second mechanical treatment and post-treatment. According to the low-temperature clean pulping method of the wheat straw biological mechanical pulp, steam consumption can be effectively reduced, the treatment efficiency is improved, the yield is increased, pulping uniformity is improved, meanwhile, water treatment defects and fine fiber loss in the pulping process are avoided, the treatment cost is reduced, and pulping cleanliness and environmental friendliness are improved.

A cooking method and a digester system wherein partly digested cellulosic fiber source is compressed during cooking to provide high molecular weight xylan, high molecular weight lignin and pulp.

A screen plate for a pulp screening machine. On the side towards the rotor of the pulp screening machine, the screen plate has concave grooves. Except in the region of the grooves, an even gap is formed between the vane of the rotor and the surface of the screen plate, wherein the rotor vane front edge of the pulp screening machine is arranged at an angle to the grooves. Also, a pulp screening machine with the screen plate.

The invention relates to a plant (100) for pulp preparation and supply of pulp of production quality (160) to at least one fiber forming plant (200), wherein the plant is built in scalable modular form, as well as a fiber forming plant (200) with such a plant (100) and a method (300) for building such a plant (100) and a method (400) for extending such a plant (100).The system (100) comprises at least one supply module (110) and one or more process modules (120), wherein the supply module (110) and the process modules (120) are equipped with a multitude of coordinated interfaces (150) to connect the supply and process modules (110, 120) to each other, to ensure the infrastructure supply of the process modules (120), and to receive the pulp or its components and starting materials via at least one input (130) and transport it between the process modules (120), and to offer the pulp with production quality (160) via an output (140) for use by at least one fiber forming system (200).

The invention relates to a method for producing paper from a cellulose pulp, wherein waste wood is used as a starting material in a wood pulping method. The waste wood, selected from at least one of the classes A I, A II, and A III according to the German Waste Wood Ordinance for chipping or pulverizing, is comminuted to chips of one of the size classes including classes smaller than # 3, # 3, # 7, and # 13 according to SCAN CM 40:01; the formed waste wood chips are pre-steamed with saturated steam at temperatures between 85 °C and 120 °C at a pressure between atmospheric pressure and approximately 5 bar for a period of time between 1 and 90 minutes; the pre-steamed chips are pulped at a pressure between atmospheric pressure and 15 bar for a period of time of at least 20 minutes and are impregnated with an anionic or non-anionic organic additive in quantities ranging from 0.01 to 10 wt.% per ton of absolutely dried biomass; the chips are subsequently cooked at a pressure between atmospheric pressure and 15 bar; and the formed pulp is discharged and optionally mixed with additives such as starches, fixing agents, and / or flocculants and is subjected to a dewatering process and a subsequent drying process.

A solid lignocellulosic bioplastic can be formed from a biomass comprising an intertwined structure of lignin, hemi-cellulose, and cellulose. The lignin in the biomass can be dissolved such that the cellulose is fibrillated. After the lignin dissolution and cellulose fibrillation, the lignin can be regenerated in situ. The regenerated lignin can be deposited on and can form hydrogen bonds between the fibrillated cellulose, so as to form a slurry of lignin-cellulose solids in solution. The slurry can then be dried to form the bioplastic. In some embodiments, the lignin is dissolved by immersing the biomass in a first chemical. The lignin can then be regenerated in situ by addition of a second chemical to the first chemical.

The application discloses lignocellulose microfibril and a preparation method thereof, and comprises the following steps: 1) performing enzyme treatment on agricultural straw; 2) performing alkali activation treatment on the agricultural straw treated in the step 1); and 3) performing mechanical grinding on the agricultural straw treated in the step 2) to obtain lignocellulose microfibril. The application directly performs microfibril treatment on the whole component of the agricultural straw lignocellulose by combining the biological treatment, the alkali activation treatment and the mechanical grinding with different gradient concentrations, has high production efficiency, avoids the cost increase and the environmental load caused by the component separation of the agricultural waste in the traditional method, and the prepared lignocellulose microfibril has both the mechanical strength of cellulose and the thermosetting property of lignin, and can be applied in the fields of thermosetting resin, plastic blown film and hot-press forming and the like.

The invention discloses a paper shredding device with a waste chip cleaning function, and relates to the technical field of waste chip cleaning, the paper shredding device with the waste chip cleaning function comprises a shell, a material sensor is installed on the shell, a paper inlet hole is formed in the top of the shell, an air blower is installed outside the shell, and the air blower is connected with the material sensor. A crushing chamber and a working chamber are formed in the shell, an air conveying device is installed at the top in the crushing chamber, crushing hubs are symmetrically installed in the crushing chamber, a through hole is formed in the side, close to the working chamber, of the crushing chamber, the two crushing hubs penetrate through the through hole to enter the working chamber, and a driving motor is installed in the working chamber. The driving motor and the air blower are both electrically connected with the material sensor, when paper enters the paper shredding device, the material sensor controls the driving motor to start, the two shredding hubs rotate to shred the paper, and the air blower continuously supplies air to the air conveyor within a period of time from the beginning of the paper shredding process to the end of the paper shredding process. And the scraps on the inner walls of the crushing hub and the crushing chamber are cleaned.

There is provided a refining device including: a casing that has a supply port to which a raw material containing a fiber is supplied and a discharge port for discharging a refined product obtained by refining the raw material; a rotor that is rotatably installed in the casing and has a plurality of blades disposed radially from a rotation axis; a filter member that is installed in the casing to cover an outer periphery of the rotor and is composed at least partially of a mesh; and a flow rectifying member that is positioned in an annular space between the filter member and an inner peripheral surface of the casing and protrudes toward the discharge port.

The invention discloses a defibrator with a plane static disc adjusting mechanism. The static disc seat is provided with a feeding hole, the grinding chamber body is connected to the static disc seat, a movable grinding disc is rotatably mounted in the grinding chamber body, and a static grinding disc is fixedly mounted on the static disc seat; grinding discs are arranged on the opposite surfaces of the movable grinding disc and the static grinding disc, and a grinding disc gap is formed between the grinding discs; the static grinding disc comprises a plane static disc installed below the static disc seat through an adjusting mechanism, the adjusting mechanism comprises a plurality of adjusting seats which are arranged above the static disc seat along the circumference and connected with the plane static disc through a lead screw mechanism, and one adjusting seat is provided with a gear motor used for driving the lead screw mechanism. And the adjusting seats form a linkage relationship through a gear pair. The device has the advantages that the plane static disc is installed through the multiple lead screw mechanisms, the lead screw mechanisms form a transmission relation through the gear pairs, the adjusting process is time-saving and labor-saving, the lead screw mechanisms have good synchronism, gaps of all grinding discs are uniform after adjustment, and therefore the quality of produced fibers is effectively guaranteed.

A method for recovering cellulose from a cellulose containing textile raw material containing dyed textiles, the method comprising subjecting a disintegrated textile raw material to an oxidative pretreatment before alkaline cooking and any further processing of the cellulose pulp obtained after the alkaline cooking. After cooking, spent alkaline cooking solution containing dye and dye residues is withdrawn from the textile derived cellulose pulp and is transferred to a recovery boiler in a Kraft pulp mill. An apparatus for carrying out the method is also disclosed.

Disclosed herein are novel methods to prepare paper pulp from non-wood fiber sources, and preferably from a variety of different non-homogeneous fiber sources. The methods use a unique combination of caustic and temperature without a digestor to improve performance of the resulting fibers.

The invention provides a micronization device capable of smoothly discharging generated micronized materials from a discharge port. The micronization device is characterized by being provided with: a housing having a supply port to which a raw material containing fibers is supplied, and a discharge port from which a micronized material obtained by micronizing the raw material is discharged; a rotor that is rotatably provided in the housing and has a plurality of blades disposed radially from a rotation axis; a filter member which is provided in the housing so as to cover the outer periphery of the rotor, and at least a portion of which is configured from a screen; and a rectifying member located in an annular space between the filter member and the inner peripheral surface of the housing and protruding toward the discharge port.

The present invention relates to a thermosensitive recording material, the color layer of which contains at least one removable dye, more particularly a dye that can be removed in the waste paper cycle; to a method for decolorizing a thermosensitive recording material to obtain a fibrous material mixture, the method comprising the steps of providing a mixture of a thermosensitive recording material and at least one other type of paper, more particularly at least one waste paper type, and then decolorizing the mixture in a deinking process to obtain a fibrous material mixture; to a fibrous material mixture obtained by said method; to a method for producing recycled paper comprising a fibrous material mixture by compressing and dewatering the fibrous material mixture; and to recycled paper obtainable by said method.

This invention discloses a fixed plate and a fiber separator, belonging to the field of fiber separators. The fixed plate includes a shell, a top plate and a bottom plate disposed opposite each other, and an outer side plate surrounding the top and bottom plates. A receiving cavity is formed between the top plate, the bottom plate, and the outer side plate. A plurality of telescopic connecting blocks are disposed within the receiving cavity. The outer side plate has clearance openings corresponding to the positions of the telescopic connecting blocks, and the telescopic connecting blocks are configured to at least partially pass through the clearance openings to abut against the cavity of the fiber separator. Compared with the prior art, the fixed plate of this invention is lightweight, firmly positioned, easy to install, and has good sealing performance.

A grinding plate for a refiner (100) for refining lignocellulosic material, the grinding plate (30) having an active surface (1; 1') comprising a pattern of knives (10) and grooves (20) arranged in a plurality of pattern areas (41; 41'), wherein the pattern areas (41; 41') are positioned side by side to each other to cover at least a part of the active surface (1; 1'). Each of the pattern areas (41; 41') has a length I extending between a first end (43a) and a second end (43b) of the pattern area (41; 41') and a width w extending between two side edges (45a, 45b) of the pattern area, wherein the distance between the two side edges (45a, 45b) is smallest in the first end (43a) of the pattern area (41; 41') and increases towards the second end (43b) of the pattern area. Each of the pattern areas (41; 41') is positioned on the active surface (1; 1') such that a centre line c of the pattern area (41; 41') is arranged at an angle p of between 10-60° to a radius R of the grinding plate (30).

This disclosure provides a grinding disc (1) for fine grinding of lignocellulosic materials. The grinding disc (1) has a surface comprising a plurality of cutting teeth (10) extending in a direction between the inner periphery (17b) and the outer periphery (17a) of the grinding disc (1). j ), and multiple paddle stops (11 i Each baffle is located in the corresponding pair of adjacent cutter teeth (10). k 10 K+1 The grinding disc (10) extends between the two sides. The grinding disc (11) of the fine grinding mill includes at least one slurry baffle (11). p ), the slurry baffle (11) p The grinding disc (1) includes a curved side (11c) facing the inner periphery (17b) of the grinding disc (1). The curved side (11c) has a concave curvature relative to the inner periphery (17b), thereby allowing the grinding disc (11) to be positioned within the grinding disc. p ) and corresponding pairs of adjacent cutting teeth (10 k 10 k+1 A circular portion is formed within the area (20) defined by the slurry. Additionally, at least one slurry baffle (11) p The grinding disc is a three-dimensional extended body. The circular portion generated by the concave curvature gives the grinding disc of the fine grinding mill more robustness. This disclosure also provides a fine grinding mill disc including such a fine grinding mill disc. This disclosure further provides a fine grinding mill having at least one such fine grinding mill disc.

The present invention discloses a cooking method and digestion system in which a partially digested cellulosic fiber source is compressed during cooking to provide high molecular weight xylan, high molecular weight lignin and pulp.

Disclosed is mechanical and decolorization pretreatment of cotton-containing textiles, such as "trash" feedstock in terms of end-of-life-cotton textiles, that may be used to produce sugar without the use of harsh pretreatments conditions.

A set (300, 400) of plate segments, wherein the segments are preferably configured for a conical refiner, and wherein the set (300, 400) of plate segments comprises: a first plate segment (302, 402) including a refining face including a refining zone comprising rows of bars (350, 352) and grooves between the rows and the grooves include a first deep section at a first radius from a rotational axis of the first refiner plate segment and a first shallow section at a second radius, and a second plate segment (304, 404) including a refining face configured to oppose the refining face of the first plate segment (302, 402) when the set (300, 400) is mounted in a refiner, wherein the grooves have a second deep groove section at the second radius and a shallow section at the first radius.