214results about "Raw material pretreatment" patented technology

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.

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 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 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.

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.

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.

The invention comprises a method for manufacturing a container for the storage, transport and / or sale of mushrooms, said method comprising the steps of: collecting a residual substrate derived from the growing of mushrooms on a substrate; optionally, adding water to the residual substrate; mixing the residual substrate obtained to form a pulp; cooking the pulp; transferring the pulp into a mold; pressing the pulp in the mold, resulting in a transfer mold; and cooling and drying the transfer mold, resulting in a container for the storage, transport and / or sale of mushrooms.

The invention relates to the technical field of paper product production repulping, in particular to a paper product production repulping device which comprises a repulping device body, a supporting frame, a strong magnetic adsorption cylinder, a driving assembly, a connector, a stirring rod, a smashing blade, an opening assembly and a cleaning scraper. A feeding port is formed in the upper end of the pulping device body, the upper end of the pulping device body is connected with a strong magnetic adsorption cylinder, the right side of the supporting frame is connected with a driving assembly, the driving assembly comprises a positioning sleeve, and the inner side of the positioning sleeve is connected with a stirring rod; feeding raw materials are pretreated through the strong magnetic adsorption barrel, large-size metal impurities are rapidly adsorbed, then tiny metal particles are continuously adsorbed through the electromagnet in the rotating process of the mixing rod, double guarantees of coarse screening and fine filtering are formed, the metal removal rate is effectively increased, and through linkage of the distraction assembly and the distraction device, the large-size metal impurities can be effectively removed. And the cleaning scraping plate is driven to press downwards to scrape fibers, so that long-term stable operation of equipment is guaranteed.

The invention discloses waste leftover material recycling equipment based on sacrifice yellow paper production, relates to the technical field of solid waste recycling, and aims to solve the problems that according to the background technology, dynamic adjustment cannot be conducted according to the fragment size of materials, the crushing particle size is uneven, the beating degree does not meet the requirement, and the final paper pulp quality fluctuation is large. In order to solve the problem of energy waste caused by the fact that a large amount of waste heat generated during operation of components such as a motor in equipment is directly dissipated into air and is not effectively utilized, the following scheme is provided: the device comprises a base of which the outer wall of the bottom is connected with four Foma wheels through bolts, a PLC (Programmable Logic Controller) is connected to the outer wall of the top of the base through bolts, and a storage mechanism is arranged at the top of the base; the storage mechanism comprises an outer cylinder. Optimization of technological parameters in the whole process from crushing to pulping can be dynamically adjusted according to changes of materials, high-quality paper pulp stable in quality and high in uniformity is finally produced, a large amount of waste heat generated during operation of the motor can be recycled, and energy waste is avoided.

The utility model provides a raw material cleaning device for paper production, which relates to the technical field of paper production and comprises a cleaning box, a filter screen plate with a notch on one side is arranged in the cleaning box, and a guide component is arranged between the cleaning box and the filter screen plate. A lifting part is arranged on the side wall of the cleaning box and on the side away from the notch end of the filter screen plate, a rotating motor operates to drive a gear to rotate, a rack is driven to slide and ascend and descend in a dustproof shell, the rack pushes the filter screen plate to ascend and descend, and raw materials placed in the filter screen plate are lifted or sunk. Cleaning liquid in the cleaning box is heated through the heating plate, raw material separation and softening are accelerated, a worker can pick out the raw materials from one side of a notch of the filter screen plate when the filter screen plate is lifted, physical exhaustion can be reduced, and the raw materials are treated in one step.

The invention relates to a portable efficient separation tool for a core roll paper core pipe. The portable efficient separation tool comprises a square base, an iron column and an annular ring. The iron column is vertically fixed on the square base; the annular ring is fixedly arranged on the iron column and located at the position, 5-6 cm away from the square base, of the iron column. The problems that core base paper of core roll degraded paper-making paper is difficult to separate, the manual stripping efficiency is low, and the labor intensity is high are solved.

The present invention relates to a method for manufacturing a purified fiber fraction from used beverage carton (UBC), said method comprising the steps: a) subjecting UBC starting material to a polymer and aluminum film separation method to obtain a UBC polymer and aluminum fraction and a raw UBC fiber fraction; b) optionally subjecting the raw UBC fiber fraction to a coarse screening method to remove coarse particles; c) subjecting the raw UBC fiber fraction to a fine screening method to remove cellulose fines and fine particulate contaminants, wherein the fine screening method comprises at least one fine screening step and at least one washing step; d) optionally subjecting the fine screened UBC fiber fraction to a washing method to remove further contaminants; e) optionally subjecting the fine screened UBC fiber fraction to a bleaching method; f) subjecting the fine screened, and optionally bleached, UBC fiber fraction to a dewatering method to a consistency of at least wt%; and g) subjecting the dewatered UBC fiber fraction to deactivation to obtain a purified 20 UBC fiber fraction.

The invention provides a clean production process for producing corrugated medium paper by using a waste paper box. The clean production process is characterized by comprising the following steps: step 1, pretreating the waste paper box through special equipment; 2, pulping and repulping: putting the treated waste paper box into special equipment, and controlling the pulping concentration; step 3, screening, purifying and mixing: screening and purifying the slurry through conventional filtering equipment, removing large particles and suspended matters, adding a petrochemical additive, and enhancing the fiber interweaving force through in-pipe mixing and a fibrillation process; the waste paper box is subjected to early-stage pretreatment by arranging special equipment, oiled paper, wax paper and the like influencing subsequent preparation are removed firstly, it is guaranteed that raw materials are clean, and the production quality of corrugated paper is guaranteed; and by designing the fourth step, waste materials and waste mud generated in the corrugated paper production process are fully utilized, resources are efficiently utilized, and waste is prevented.

A method for processing a bark press water from sawmills and / or pulp mills is disclosed. According to the disclosure, the method comprisesa) filtration of the bark press water to provide a bark press water filtrate having a particle size of less than 100 μm, and b) concentrating the bark press water filtrate to a level of at least 10% dry weight and thereby providing a first fraction of concentrated bark press water, comprising tannic compounds; and a second fraction of purified bark press water.

The invention discloses a lignocellulose continuous multi-stage steam explosion pretreatment process and device, and relates to the technical field of lignocellulose raw material pretreatment. Comprising the following steps: continuously conveying lignocellulose loaded with a chemical additive into a steam explosion pretreatment reaction tube, carrying out continuous three-stage low-temperature reaction coupling high-pressure explosion treatment, and spraying to obtain a pretreated lignocellulose material; wherein the specific parameters of the continuous three-stage low-temperature reaction coupling high-pressure blasting treatment are as follows: the treatment is performed for 5-9 minutes at the temperature of 80-120 DEG C in the first-stage treatment, the treatment is performed for 2-6 minutes at the temperature of 140-160 DEG C in the second-stage treatment, and the treatment is performed for 1-3 minutes at the temperature of 180-220 DEG C in the third-stage treatment; the pressure is 0.5 to 2.0 MPa. According to the continuous steam explosion lignocellulose complete equipment and the pretreatment method, effective continuous production of biomass raw materials can be achieved, low-inhibitor lignocellulose hydrolysis sugar liquid is obtained, fermentation conversion of downstream microorganisms is facilitated, wastewater discharge and use of chemical auxiliaries are reduced, and commercialized large-scale production is expected to be further achieved.