155results 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 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.

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.

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 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 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.

The embodiment of the application relates to a low-density molded packaging product plant fiber material taking coconut fiber as raw material and a preparation method and application thereof, and belongs to the technical field of fiber packaging materials. The preparation method of the low-density molded packaging product plant fiber material taking coconut fiber as raw material comprises the following steps: step one, pretreatment; step two, chemical immersion; step three, grinding separation; step four, high-concentration immersion waste liquid extraction and impurity removal; and step five, fine grinding treatment. The fiber material provided by the embodiment of the application can improve the performance of molded products, further expand the application range of molded products, expand the industrial utilization range of characteristic plant fiber raw materials, improve the industrial utilization added value, reduce the dependence of the molded industry on paper pulp raw materials for papermaking, and relieve the pressure of insufficient paper pulp supply.

The utility model relates to the technical field of filter paper processing, and one embodiment of the utility model provides a pulper for high-infiltration-rate environment-friendly filter paper production, the pulper comprises a pulping barrel, a feeding cover is arranged at the upper end of the pulping barrel, a pulping monitoring assembly is arranged in the pulping barrel, and a driving discharging assembly is arranged on the lower end face of the pulping barrel; the repulping monitoring assembly comprises a motor table, a stress sleeve is arranged at the detection end of the thrust sensor, and the stress sleeve is located on the side wall of the repulping rod. By means of the technical scheme, the problems that in the prior art, a traditional pulper mostly adopts a single stirring structure, raw materials are impacted and crushed through high-speed rotating blades, but for long-fiber raw materials needed by high-infiltration-rate filter paper, the equipment is prone to fiber breakage due to excessive shearing, the brooming rate of pulp is reduced, and the production cost is lowered are solved. Meanwhile, the repulping process lacks a real-time monitoring mechanism, repulping parameters are difficult to dynamically adjust according to the characteristics of raw materials, and the repulping quality stability is poor.

A method for processing a lignocellulose biomass material with a moisture content below 10 weight-% and an ash content below 1.0 weight-% includes: adding an acid catalyst to the lignocellulose biomass material; after adding the acid catalyst, thermally treating the lignocellulose biomass material with steam at an elevated pressure and an elevated temperature in at least one reactor; discharging the lignocellulose biomass material and blow steam from the at least one reactor using a steam explosion discharge device; and forming pellets and / or briquettes from at least part of the discharged thermally treated lignocellulose biomass material.

The application discloses a method for improving the drainage of cotton stalk chemi-mechanical pulp, and belongs to the field of pulping and papermaking. The method comprises the following steps: after the cotton stalk is crushed, washed and steamed, a first chemical impregnation agent is added, and then mechanical disintegration is performed to obtain cotton stalk material; pectinase is used to perform enzyme pretreatment on the cotton stalk material to obtain pretreated material; a second chemical impregnation agent is added to the pretreated material, mechanical disintegration is performed, and then refining disintegration is performed to obtain refined material; after the refined material is washed, enzyme treatment is performed on the refined material by using pectinase to obtain cotton stalk chemi-mechanical pulp with obviously improved drainage. By selecting pectinase as a biological enzyme and designing a two-stage treatment process of pectinase, pectin substances in cotton stalk raw materials can be effectively removed, pectin is degraded into small molecular substances such as galacturonic acid, the drainage of cotton stalk chemi-mechanical pulp is improved, and the influence of pectin on the papermaking process is eliminated.

The invention relates to the field of paper pulp processing, in particular to a paper pulp processing technology. The paper pulp processing technology has the beneficial effects that when wood of a paper pulp raw material is cut, the cut wood is conveniently collected, so that the situation that the tidiness of a processing site is affected by scattering of the cut wood is prevented, and the risk that workers nearby are injured by a large wood after the large wood is cut is prevented. According to the technical scheme, the paper pulp processing device comprises a discharging ship and a butt joint pipe fixedly connected to the right side of the discharging ship, an arc-shaped seat is fixedly connected to the right side of the bottom of the discharging ship, a material receiving frame is fixedly connected to the arc-shaped seat, a feeding hole is formed in the front side of the material receiving frame, and the butt joint pipe is fixed and communicated to the feeding hole; a rotating rod is rotationally connected to the middle of the left side of the receiving frame, a cutter frame is fixedly connected to the right side of the rotating rod, and a plurality of cutters are evenly arranged on the cutter frame in the circumferential direction.

The invention belongs to the technical field of paper yarn textile recovery, and provides a recovery method of a paper yarn fabric. The method comprises the following steps: mixing a paper yarn fabric with water, adding a nonionic surfactant, and defibering to obtain a defibering system; sequentially adding an oxidizing agent and a metal ion activating agent into the defibering system, and carrying out activation reaction to obtain redispersed paper yarn fibers; the nonionic surfactant is a PEG (Polyethylene Glycol) series or a Tween series; the oxidizing agent is persulfate; the metal ion activating agent comprises oleic acid modified nano zero-valent iron and bivalent copper salt. The length of the obtained redispersed paper yarn fiber ranges from 1.5 mm to 2.1 mm, the length retention rate ranges from 63% to 88%, and the yield ranges from 80% to 98%.

Novel wheat milling derivative products obtained from one or more non-food wheat milling products are described, as well as methods for making the same. The wheat milling derivative products enable up to 15% by weight of cellulosic fibers in paper or in paper packaging to be displaced, diminishing the negative environmental impacts heretofore associated with the making of these paper and paper packaging products and thus improving the sustainability of these paper and paper packaging products, and derive from non-food wheat milling products already realized in conventional wheat milling.

The invention provides anti-aging high-strength composite wild goose skin paper as well as a preparation method and application of the anti-aging high-strength composite wild goose skin paper. According to the method, steaming is combined with compound enzyme treatment, dissociation extraction of the wild goose skin bast fibers and the bamboo pulp is achieved, and the quality and the yield of the wild goose skin fibers are guaranteed. Compared with chemical fibers, the wild goose skin fibers show obvious property enhancement. Then, the obtained pulp is subjected to different mixing ratios and beating modes, a specific sizing method and a sizing agent are combined to obtain the anti-aging and high-strength composite wild goose skin paper, the softness of the paper is guaranteed while the tightness and the strength are achieved, and the anti-aging and high-strength composite wild goose skin paper can be applied to the field of certain special paper.

A method for processing fibrous cellulosic material from algae comprising: (i) suspending the fibrous cellulosic material in water to form a suspension; and (ii) passing the suspension through at least one chamber having a large gap, at a high shear to produce cellulose nanofibrils. Also described are cellulose nanofibrils and cellulose nanocrystals, products, methods and uses of the same.