271results about "Raw material pretreatment" patented technology

According to an example aspect of the present invention, there is provided a method comprising: providing a pulp composition; screening the pulp composition to obtain an accept fraction and a reject fraction; and dewatering the accept fraction output from the screening by a screw press.

The present invention relates to a multilayer sheet liner for a food or beverage packaging material, the multilayer sheet liner comprising: a first ply comprising at least 70% by weight of unbleached kraft pulp and less than 30% by weight of neutral sulfite semi-chemical (NSSC) pulp, based on dry weight, and a second ply comprising at least 70% by weight of unbleached kraft pulp and less than 30% by weight of neutral sulfite semi-chemical (NSSC) pulp, based on dry weight, wherein the second ply comprises at least 50% by weight of NSSC pulp and less than 50% by weight of unbleached kraft pulp based on dry weight, and wherein the NSSC pulp in the second ply is a washed NSSC pulp having an ash content of less than 1.8% by weight as determined according to Standard ISO 1762: 2019. The invention relates to a method for manufacturing the multilayer sheet liner.

The present invention provides a water-closed cycle waste paper pulping system and a process thereof, which relates to the technical field of pulping devices, and includes: a base, which is a rectangular plate-shaped structure, and is placed on the ground, and a box body with a rectangular box-shaped structure is fixed on the base. The present application, through the arrangement of the second barrel body and the third barrel body, firstly, can precipitate the pulp, and through precipitation, the excess water can be extracted, thereby ensuring the water content of the pulp; secondly, after the excess water is extracted, the water can be decomposed by a decomposition agent, and after decomposition, it can be put into the box body again for continued use, thereby realizing the circulation of water and saving water; the present application, through the arrangement of auxiliary components, firstly, the array-shaped air holes on the annular seat can improve the mixing effect of the pulp in the first barrel body, thereby improving the bleaching effect; secondly, under the telescopic action of the electric cylinder, the height change of the annular seat can be realized, thereby further improving the bleaching effect.

The invention relates to the technical field of aramid fiber recycling, high-performance fiber modification and functional fiber reinforced materials, in particular to recycled aramid pulp with mechanical force induced brooming and a preparation method of the recycled aramid pulp. The preparation method comprises the steps of physical screening, chemical stripping pretreatment, thread rolling, pulping, pulping mechanical force coupling, stepped heating drying and opener secondary delinting, and the prepared high-quality aramid pulp is applied to the fields of automobile friction materials, high-performance sealing products and special rubber composite materials. The problems that traditional recycled fibers are poor in dispersity, insufficient in specific surface area and weak in matrix interface bonding can be effectively solved.

The invention discloses an chemi-mechanical pulp production method capable of improving the filtration property of chemi-mechanical pulp, and relates to the technical field of papermaking, high-concentration grinding freeness is optimized to 640 + / -30ml, pulp fine fibers can be controlled at 22%-33%, the tensile index middle-lower limit and the bulk middle-upper limit, the high-concentration grinding effect is improved, the effect between fibers is facilitated, the effect between the fibers and a grinding sheet is reduced, and the filtration property of the chemi-mechanical pulp is improved. Fiber cutting is reduced, and the content of pulp fine fibers is reduced; the MSD torque is increased to 250 + / -10 KNM, the tearing effect of wood chips is improved, the preimpregnation reaction of the wood chips is facilitated, the original fine content is controlled to 26%-29% from original 22%-33%, the pulp bulk is increased by about 0.1 cm < 3 > / g, and the tensile index is increased by 1.0 N.m / g; the four low-concentration grinders are changed into parallel connection, so that the residence time of pulp in the low-concentration grinders is prolonged, the cutting effect of the pulp ground by the low-concentration grinders on fibers is reduced, light friction between grinding sheets and the fibers is increased, fibrillation of the fibers is facilitated, the bulk and the tensile strength are improved to a certain extent, and under the content of fine fibers, the size of the fibers is reduced. And the bulkiness and the tensile index of the finished pulp are also improved to a certain extent.

To provide a roughly crushed piece supply device capable of satisfactorily and quickly agitating, discharging and humidifying roughly crushed pieces, and also to provide a fiber structure manufacturing device.SOLUTION: A roughly crushed piece supply device comprises: a storage tank that stores roughly crushed pieces including fibers and has a first space and a second space positioned below the first space; an introduction port that communicates with the first space and introduces the roughly crushed pieces into the first space; a partition part that divides the storage tank into the first space and the second space and has a communication port to make the first space and the second space communicate with each other; an adjustment part to adjust amount of the roughly crushed pieces transferred from the first space to the second space through the communication port; an agitation part to agitate the roughly crushed pieces in the second space; and a discharge port to discharge the roughly crushed pieces agitated by the agitation part from the second space.SELECTED DRAWING: Figure 2

The invention belongs to the technical field of enzymolysis and fermentation of lignocellulose, and particularly relates to a method for promoting enzymolysis and fermentation of straw cellulose by using fresh straw wall protein, which comprises the following steps: firstly, extracting straw cell wall protein and culturing engineering bacteria to obtain expansive-like protein; the method comprises the following steps: mixing the fresh straw cell wall protein and the expansion-like protein with steam explosion straw, carrying out pretreatment under proper pH and concentration, carrying out cellulose enzymolysis and synchronous saccharification fermentation, and finally converting into ethanol. The method effectively improves the straw conversion efficiency, is suitable for bioethanol production, combines the fresh straw cell wall protein and the expansion-like protein from microorganisms, and improves the bioethanol yield. The expansive-like protein and the fresh straw cell wall protein have a remarkable synergistic effect, the expansive-like protein can destroy a cellulose crystal structure in a non-hydrolytic manner and increase accessibility of cellulose, and the fresh straw cell wall protein provides multiple enzyme activities to jointly promote the enzymolysis process.

The invention relates to a preparation method of bamboo fibers for filter paper, the filter paper containing the bamboo fibers and a preparation method of the filter paper. The preparation method of the bamboo fiber for the filter paper comprises the following steps: (1) selecting bamboo materials; (2) chemical treatment is conducted, specifically, chemical treatment is conducted on the bamboo wood selected in the step (1) through chemical agents; (3) defibering: defibering the material obtained by chemical treatment in the step (2) to obtain coarse slurry; and (4) screening the coarse pulp obtained in the step (3) to obtain the bamboo fibers. The prepared bamboo fiber has the mechanical property of high elastic modulus, and the air filter paper made of the bamboo fiber has the properties of high breathability, high stiffness and high bulk.

The invention belongs to the technical field of pulping and papermaking, and particularly discloses a method for preparing chemimechanical pulp by dipping bamboo reed in hot alkali and a method for constructing a model of the chemimechanical pulp, and the method comprises the following steps: putting absolutely dry raw materials of the bamboo reed into a sealing bag, adding water, sealing, and carrying out high-pressure sterilization; the method comprises the following steps: carrying out extrusion defibering and hot alkali dipping on the gold arundo donax subjected to high-pressure sterilization, and then collecting a treatment solution, in the hot alkali dipping process, alkali in hot alkali liquor is NaOH, in terms of Na2O, the use amount of the alkali is 4-8%, the temperature is 90-100 DEG C, and the dipping time is 30-60 minutes; carrying out segmented pulp grinding on the residual solid; and washing the ground pulp, heating for latency elimination, screening to obtain fine pulp, and pulping to obtain the product. After appropriate hot alkali dipping, paper made of the golden reed chemimechanical pulp can be comparable with wheat straw chemimechanical pulp paper in physical performance.

The invention relates to the technical field of agricultural waste regeneration, and discloses a method for producing biomass protein by efficiently pretreating straw biomass through combination of steam explosion and a deep eutectic solvent, and the method comprises the following steps: air-drying straw at room temperature, crushing, and pre-extracting to obtain a straw sample for later use; adjusting the water content of the straw sample to a target water content, fully absorbing water at room temperature, filling the straw sample into a steam explosion reaction device, and carrying out steam explosion reaction; carrying out deep eutectic solvent treatment; and carrying out enzymolysis saccharification and fermentation treatment. By adopting the method disclosed by the invention, the removal rate of lignin reaches up to 40.8%, and meanwhile, more than 43.2% of hemicellulose is reserved; meanwhile, the specific surface area and the pore volume are increased, the straw structure is looser and curler, enzyme adsorption is facilitated, and the total sugar conversion rate reaches 50.4%. The crude protein content in the fermentation product reaches 25% or above, and the true protein content reaches 24.5%. The obstacle of straw biomass conversion is overcome, and a foundation is laid for processing the straw biomass into protein feed in a value-added mode.

The invention belongs to the technical field of disposable tableware, and particularly relates to wheat straw fiber-based full-degradable molded product slurry as well as a preparation method and application thereof. The wheat straw fiber-based fully-degradable molded product slurry is prepared from wheat straw slurry, wheat bran, modified soybean protein glue, palm wax, nano cellulose, chitosan, triethyl citrate, sodium carboxymethyl cellulose and calcium sulfate. Wherein the wheat straw slurry adopts a microbial pretreatment process, the usage amount of chemicals is reduced, pulping waste liquid can be recycled as an organic fertilizer, and the problem of high pollution caused by traditional chemical treatment is avoided; all auxiliary agents in the formula, such as modified soybean protein glue, palm wax, chitosan and the like, are biodegradable materials, and the final product can be completely degraded in the natural environment and meets the full-degradation standard.

The process for the production of particle board, MDF board or HDF board comprises the step of recycling particle board material, MDF and / or HDF board material in which recycled chips and / or recycled wood fibers are produced. The process comprises the step in which the particle board material, the MDF and / or HDF board material is wetted, heated and pressurized, wherein this material is kept under pressure and at an elevated temperature for a certain time. The process comprises the step of supplying the recycled chips and / or the recycled wood fibers as base material in a production process of particle board, MDF board or HDF board.

The invention pertains to a method for processing a carpet product comprising face yarns and a backing material embedding a lower portion of the face yarns, using an apparatus comprising a container for receiving at least a portion of said carpet product, said container comprising a bottom wall and a top wall connected by an upright wall and at least one rotary crank positioned in said container, wherein said upright wall comprises an unravelling arrangement positioned in the circumference of said rotary crank, the unravelling arrangement comprising protrusions provided on said upright wall extending into the inside of said container from said wall towards said rotary crank, the method comprising feeding the at least portion of said carpet product into the container, rotating the rotary crank to induce that the at least portion of the carpet product travels along the protrusions for unravelling said carpet product in a first fraction comprising at least part of the face yarns and a second fraction comprising at least part of the backing material.

The process for the production of wood fiberboard comprises the step in which refined material from recycled wood fiberboards is wetted, heated and pressurized using steam; the step in which this material is kept under pressure and temperature for a certain amount of time, followed by the step of reducing the pressure of this material by at least 3 bar. After this pressure reduction, the material is transformed into recycled wood fibers, possibly with a fraction of wood fiber clumps and any other impurities. The recycled wood fibers are supplied as feedstock in a production line for producing wood fiberboard.

A modified aqueous acid composition comprising: sulfuric acid; a compound comprising an amine moiety and a sulfonic acid moiety; and a peroxide; wherein sulfuric acid, said compound comprising an amine moiety and a sulfonic acid moiety and said peroxide are present in a molar ratio of no less than 1:1:1. Also disclosed are methods of using such compositions.

The invention discloses novel insulation paper and a preparation method thereof. The novel insulation paper comprises the following raw materials in parts by weight: 60-65 parts of flame-retardant bamboo pulp; 15-20 parts of waste paper regenerated fiber; 8 to 10 parts of modified montmorillonite; 5-8 parts of a zinc borate compound; 3-5 parts of glycerol ester of rosin; 1 to 2 parts of polyvinyl butyral; the invention relates to the technical field of insulation paper. According to the novel insulation paper and the preparation method thereof, through cooperation of the flame-retardant bamboo pulp, the waste paper regenerated fibers, the modified montmorillonite, the zinc borate compound, the rosin glyceride and the polyvinyl butyral, the low-cost requirement is ensured by utilizing regenerated materials, the breakdown field strength of the insulation paper is improved, the thermal aging life of the insulation paper is prolonged, and the limit oxygen index of the insulation paper is increased; the insulation paper has the advantages that the insulation paper is simple in structure, use reliability is guaranteed, the problems that natural fiber insulation paper is prone to moisture absorption and low in strength are solved, good flame retardance and surface hydrophobicity are achieved, and effective support is provided for light-weight and high-efficiency development of transformers.

The present disclosure relates to a method for producing chemithermomechanical pulp, CTMP, comprising: a) providing wood chips comprising softwood, hardwood or a mixture thereof; b) storing the chips at a temperature of 45-75 °C for at least 24 h in an aerobic environment to obtain matured chips; c) impregnating the matured chips with an impregnation liquid to obtain impregnated chips; d) transferring the impregnated chips to a heating zone; e) heating the impregnated chips in the heating zone with steam to obtain pre-treated chips; f) defibrating the pre-treated chips to obtain a pulp; and g) dewatering the pulp.

The present invention relates to a preparation method for a bamboo fiber for filter paper, filter paper containing the bamboo fiber, and a preparation method for the filter paper. The preparation method for a bamboo fiber for filter paper of the present invention comprises the following steps: (1) material selection: selecting bamboo; (2) chemical treatment: using a chemical agent to perform chemical treatment on the bamboo selected in step (1); (3) defibering: defibering the material obtained by means of the chemical treatment in step (2), to obtain coarse pulp; and (4) screening: screening the coarse pulp obtained in step (3) to obtain the bamboo fiber. The bamboo fiber prepared in the present invention has the mechanical property of a high elastic modulus, and the air filter paper manufactured using the bamboo fiber has the properties of high air permeability, high stiffness and high bulk.

The invention relates to the technical field of high polymer material production, and discloses a digesting and mincing device for waste paperboard recycling, which comprises a supporting foot stool, the top end of the supporting foot stool is connected with a protective shell, a stirring cylinder is rotatably arranged in the protective shell, a crushing cylinder is rotatably arranged in the stirring cylinder, and a crushing device is arranged in the crushing cylinder. A double-layer filter screen is arranged on the surface of the stirring barrel, and a first sealing bearing is connected between one side of the double-layer filter screen and the protective shell. According to the invention, rotation of the stirring cylinder, rotation of the crushing cylinder and action time sequence of each component are respectively controlled, so that the waste paperboard processing requirements of different batches and different states can be flexibly adapted, accurate control of digestion time, stirring strength, crushing strength and cleaning process is realized, and adaptability and controllability of the process are enhanced.

Process for the production of recycled lignocellulose fragments (10), comprising a step in which refined material (1) from recycled lignocellulose based boards or panels is introduced into a receptacle, and wetted, heated and pressurized using steam; wherein the process comprises a step of steam explosion of the wetted, heated and pressurized material, in which the pressure in the receptacle is reduced by at least 3 bar, and in which recycled lignocellulose fragments (10) are produced; wherein the steam explosion is a multistage steam explosion.

This invention provides a biomass pretreatment method using a steam-coupling twin-screw extruder, along with cellulose-containing biomass and its applications. The biomass pretreatment method includes the following steps: sequentially subjecting pre-softened biomass raw materials to steam treatment and twin-screw extrusion crushing to obtain biomass particles; the biomass particles are then subjected to a cooking reaction to obtain cellulose-containing biomass. This invention utilizes the synergistic effect of steaming and twin-screw extrusion crushing to overcome the mass transfer resistance of dense wood with low energy consumption, aiming to solve the problems of dense forest biomass structure, high energy consumption in traditional pretreatment methods, and difficulty in chemical penetration. This process can effectively reduce the amount of chemicals used to achieve efficient and directional separation of components, fully adapting to the needs of low-cost, continuous industrial production.

The application discloses a preparation method of light fireproof sound-absorbing fiberboard and relates to the technical field of fiberboard materials.The method comprises the following steps: washing, cooking, hot grinding, adding black dye, adding a fire retardant, adding azodicarbonamide as an additive, spraying, hot pressing, and sawing.The temperature of the spraying is controlled within 100-110 DEG C, and the spraying amount is controlled within 30-50 kg / h.The fiberboard prepared by the method has a single-layer structure, has good sound-absorbing effect, does not need to be matched with sound-absorbing materials, can be thinnest to 9 mm, reaches the national fireproof B1-B level standard, and can reduce the density of the board to 600-700 kg / m 3 , so as to achieve the purpose of lightening.

There is provided a crushed piece supply device including a storage tank that stores a crushed piece containing a fiber, a partition portion that partitions an inside of the storage tank into a first space and a second space positioned below the first space by narrowing the inside of the storage tank, an adjusting section that adjusts a moving amount of the crushed piece moving from the first space to the second space, a stirring section that stirs the crushed piece in the second space, and a discharge port through which the crushed piece is discharged from the second space.

The application discloses a preparation method of high-strength and high-toughness bamboo holocellulose nanofiber and application thereof, and belongs to the technical field of cellulose treatment. The method adopts a choline chloride-xylose low eutectic solvent to treat bamboo holocellulose, solid-liquid separation is carried out after the treatment, the solid is dispersed, and bamboo holocellulose nanofiber is obtained through ultrasonic crushing. A bamboo nanoholocellulose film with high tensile strength and high toughness is prepared by taking the material as a substrate. The application not only effectively protects the hemicellulose content in the nanoholocellulose, but also realizes the strengthening of the mechanical performance of the nanoholocellulose film. The obtained bamboo nanoholocellulose has the advantages of uniform dispersion and the like. Meanwhile, the method itself has the advantages of simple process, mild reaction condition, environmental friendliness, easy operation and the like, realizes the utilization of the bamboo hemicellulose decomposition product, and has high application potential.

According to the straw blank deslagging device for the Chinese art paper, the plate surfaces of two side plates are vertically arranged, the plate surfaces of the two side plates are oppositely arranged in parallel, the periphery of a screen is in a square shape matched with the space defined by the two side plates, and the plate edge, located on the side where the side plates are located, of the screen is arranged in the middle of the vertical direction of the side plates at the same height; the plate edge, perpendicular to the side plate, of the screen is located at the vertically-arranged plate edge of the side plate, a belt is arranged at the position of an upper opening defined by the side plate, a material stirring rod or plate is arranged on the belt, the belt is wound around the power roller and the reversing roller, and the belt face of the belt and the plate face of the screen are integrally arranged in parallel. When the belt moves, the material stirring rod or plate stirs the straw so as to remove ash on the straw, manpower is saved, and the rice paper production efficiency is improved.

The invention discloses a molded pulp wire coil material and a preparation method thereof, and relates to the technical field of wire coil materials. The raw materials of the environment-friendly and environment-friendly material comprise the following components: 50%-85% of a waste raw material, 5%-20% of epoxy resin, 0.2%-2% of hydrogen peroxide, 0.5%-1% of ozone, 1%-3% of sodium pyrophosphate, 2%-5% of a degradable adsorption material, 1%-3% of super absorbent resin, 0.5%-1% of a sodium chloride solution, 0.5%-1% of a calcium chloride solution, 0.1%-0.5% of a bleaching agent and 0.5%-1% of an antioxidant. According to the paper pulp molding wire coil material and the preparation method thereof, the original color of the wire coil material can be guaranteed, meanwhile, the color protection effect can be achieved when the wire coil material is prepared, harmful substances existing in the wire coil material are reduced, the environmental protection performance of the wire coil material is improved, the water locking strength of the wire coil material is reduced, and the water removal rate can be increased under the condition of heat with the same energy consumption.

A method (100) for processing fibrous matter from a waste material involves obtaining (101) the waste material, trimming (102) the waste material, pre-treating (104), second mechanical treatment (106), washing (108), first chemical treatment (110) with an enzyme and water solution, draining (112) the enzyme and water solution, heating (114) to obtain a fiber cake, providing (116) controlled shockwaves, a second chemical treatment (118), hydro-extracting (120) fiber cake, opening (122) the fiber cake, drying (124), pre-conditioning and softening (126), mechanically treating and segregating (128), softening (129), processing (130) to obtain a sliver and spinning (132) the sliver to obtain a product.

An ozonated medicinal cannabis non-hemp hurd fiber pulp from purified hurd fiber irradiated with natural sunlight or synthetic sunlight or a combination thereof at an irradiance of about 10 W / m2 to about 1,000 W / m2 for a period of time from about 1 to 200 hours, wherein the purified hurd fiber is from cannabis grown at a density lower than used for growing hemp. Also provided are smoking papers containing the irradiated purified hurd fiber, or containing alkaline-treated and ozone-treated hurd fiber from cannabis grown at a density lower than used for growing hemp, wherein the hurd fiber is substantially free of bast fiber and has an average percentage of kinked fibers from about 13% to about 16%, or a coarseness from about 0.195 to about 0.285 mg / m, in combination with a fiber selected from among cannabis bast fiber, wood fiber, or a combination thereof.

The invention discloses a device and a method for treating biomass and separating lignin through electrothermal coupling dilute alkali, and belongs to the technical field of biomass resource utilization. The device comprises an electric heating reaction unit, a time-varying magnetic field in a magnetic core in the electric heating reaction unit serves as an excitation source to spontaneously induce an electric effect and a heat effect on reaction feed liquid in a reaction tube, and electric heating coprocessing is completed. The method comprises the following steps: mixing a wood fiber raw material with a dilute alkali solution, and then carrying out electric heating pretreatment by using the device disclosed by the invention; a large amount of lignin and a small amount of hemicellulose in the wood fibers can be removed through electrothermal coupling dilute alkali pretreatment. The energy loss of traditional hydrothermal treatment is reduced, the wood fibers are pretreated by means of the electric effect, the pretreatment temperature is reduced, and the requirement for equipment or devices in the high-temperature and high-pressure environment is avoided.