516results about "Paper material treatment" patented technology

The invention provides loofah sponge nanocellulose hydrogel and a preparation method thereof.The preparation method comprises the following steps that anhydrous citric acid, choline chloride and water are mixed to react, and a ternary eutectic solvent is obtained; dispersing loofah sponge purified cellulose in a ternary eutectic solvent, washing and filtering a product to be neutral, dispersing the product in water, and performing ultrasonic treatment to obtain loofah sponge nanocellulose turbid liquid; dissolving sodium lignin sulfonate and lithium chloride in a sodium hydroxide solution to obtain a precursor solution; mixing the loofah sponge nanocellulose suspension with water, polyacrylamide, ammonium persulfate and N, N-methylene bisacrylamide, pouring the precursor solution into the loofah sponge nanocellulose suspension, uniformly stirring the mixture, pouring the mixture into a mold, and sealing the mold; and forming to obtain the loofah sponge nanocellulose hydrogel. The invention also provides an application of the hydrogel. The hydrogel disclosed by the invention has excellent biocompatibility, mechanical property and conductivity, has a wide application prospect in the field of flexible electronics, and is simple in preparation process, low in cost, green and environment-friendly.

The invention discloses a preparation method of a modified corn straw nanocellulose-based dual-response controlled-release pesticide, and relates to the technical field of resource utilization of agricultural wastes and environmental protection. The method comprises the following steps: extracting nano-cellulose from corn straws, modifying the nano-cellulose with zein, preparing a modified corn straw nano-cellulose-based emulsion carrier, and preparing and evaluating the modified corn straw nano-cellulose-based dual-response controlled-release pesticide. The method verifies the effectiveness of the EDC / NHS cross-linking agent in an alcohol-soluble system, successfully modifies the corn straw nano-cellulose, realizes efficient utilization of waste resources, solves the problems of low utilization rate of traditional pesticides, combustion waste of corn straw and performance limitation of conventional cellulose, and has a wide application prospect. Meanwhile, a novel efficient, environment-friendly and economical dual-response controlled-release pesticide can be obtained, and important guiding significance is achieved for solving the bottleneck problem in the field of pesticide preparations.

According to the high-purity cellulose and the preparation method thereof, a lignocellulose raw material and a green ionic solvent are mixed and heated for a certain time under the stirring condition to obtain slurry, and the green ionic solvent is prepared by heating a hydrogen bond donor and a hydrogen bond acceptor at the temperature of 30-100 DEG C for 0.5-3 h and fully stirring the hydrogen bond donor and the hydrogen bond acceptor; adding a viscosity reduction solvent into the slurry, stirring and filtering to obtain a primary extraction filtrate and residues, washing the residues with the viscosity reduction solvent until a washing solution is colorless, naturally airing or drying the residues to obtain high-purity cellulose, and synthesizing a novel functional green ionic solvent by regulating and controlling chemical structures of hydrogen bond donors and acceptors. A green ionic solvent is utilized to effectively break through the anti-degradation barrier of lignocellulose, and mild and efficient preparation of high-purity cellulose is realized.

The utility model relates to the technical field of fermentation, and discloses a papermaking pulp deslagging device which comprises a deslagging equipment body, the stirring assembly is arranged at the axial position of the deslagging equipment body, the stirring assembly internally comprises a connecting rod used for stirring and dispersing fan blades, and a servo motor used for driving and a rotating shaft used for transmission are further arranged in the stirring assembly; the slag removal assembly is arranged on the inner wall of the bottom of the slag removal equipment body, and the slag removal assembly internally comprises a separation barrel; and the driving assembly is arranged at the top position of the inner wall of the slag removal equipment body and used for driving the separation barrel to rotate, and the driving assembly internally comprises the separation barrel, a transmission gear and a second fixing ring. According to the utility model, the stirring assembly, the deslagging assembly and the driving assembly are arranged, and the relative rotation speed between the dispersion fan blades and the separation barrel is increased through the reverse rotation of the separation barrel and the dispersion fan blades, so that the dispersion degree of the dispersion fan blades on raw materials is improved, and the problem that residues are wrapped in the raw materials and are difficult to remove is avoided.

The invention relates to the technical field of fractionation of lignocellulose biomass, and discloses a method for fractionating lignocellulose biomass by using a eutectic solvent, which comprises the following steps: mixing betaine and malic acid, stirring, and cooling to room temperature after the reaction is finished to obtain a clear and transparent eutectic solvent; the method comprises the following steps: mixing crushed lignocellulose biomass with a deep-eutectic solvent, and putting the mixture into a high-pressure reaction kettle; acetone and n-butyl alcohol are mixed according to the volume ratio of 3: 2-4: 1, and an anti-solvent is prepared; the method comprises the following steps: slowly adding an anti-solvent into a mixture of the lignocellulose biomass and the eutectic solvent, carrying out ultrasonic treatment, and then carrying out suction filtration. The glass electrode pH meter is used for measuring the pH value of the recovered deep-eutectic solvent, and the newly prepared deep-eutectic solvent is added according to the pH value, so that the stability of the solvent performance can be effectively maintained, the deep-eutectic solvent always keeps a good fractionation effect in multiple times of recycling, the utilization rate of the solvent is greatly improved, and the production cost is reduced.

The utility model relates to the technical field of papermaking, in particular to a cellulose cooking device for papermaking, which comprises a cooking vessel, a feed port arranged at the top of the cooking vessel, a discharge port arranged at the bottom of the cooking vessel, a filter sieve arranged in the cooking vessel, a stirring rod arranged in the cooking vessel, and two groups of cleaning mechanisms arranged on the stirring rod, the lifting assembly is arranged on the digester; the rotating assembly is arranged at the bottom of the digester; according to the utility model, through the arrangement of the rotating assembly, the digester can be driven to turn over up and down through the rotating assembly, so that slurry can be turned over back and forth to form a good circulation capability, and through the arrangement of the lifting assembly at the top of the stirring rod and the arrangement of the cleaning mechanism on the stirring rod, when the slurry is stirred by the stirring rod, the slurry can be cleaned. The lifting assembly drives the stirring rod to move up and down, the cleaning mechanism can move back and forth along the filter sieve and the bottom of the digester, and scaling is prevented.

The present invention provides a deep eutectic solvent and its preparation and application. The deep eutectic solvent comprises choline chloride, p-toluenesulfonic acid, 1,4-butanediol, and water; wherein the molar ratio of choline chloride, p-toluenesulfonic acid, and 1,4-butanediol is 1-2:3-6:2-8, and the ratio of the total mass of choline chloride and p-toluenesulfonic acid to the mass of water is 20:9-11. When used for the pretreatment of Miscanthus sinensis, the deep eutectic solvent of the present invention can effectively remove hemicellulose and lignin from the cell walls of Miscanthus sinensis, thereby significantly improving the efficiency of its enzymatic hydrolysis of cellulose.

The present invention discloses a process for preparing lactic acid by mechanically enhanced ammonia method from straw-like biomass. The enzymatic hydrolysate of solid fibers obtained by the mechanically enhanced ammonia method from straw-like biomass is used as the carbon source of the fermentation medium in the process of fermenting lactic acid. The preparation of the carbon source in the fermentation medium comprises the following steps: S1: treating straw-like lignocellulosic biomass with a pretreatment liquid containing ammonia water and inorganic ammonium salts in a twin-screw device; S2: subjecting the obtained material to a heat preservation reaction, and after solid-liquid separation, obtaining solid fibers containing holocellulose; S3: enzymatically hydrolyzing the obtained solid fibers with Trichoderma reesei cellulase and xylanase, and performing solid-liquid separation, and the obtained supernatant is used as the carbon source in the fermentation medium for fermenting L-lactic acid. The present invention uses the sugar liquid obtained by enzymatic hydrolysis and saccharification of pretreated holocellulose, inoculates Bacillus coagulans to ferment L-lactic acid after supplementing nitrogen source and inorganic salts, and can greatly improve the concentration and conversion rate of L-lactic acid.

The invention relates to the technical field of asphalt modification, in particular to plant multi-component extraction and application of the plant multi-component extraction to improvement of the anti-aging performance of asphalt. The extraction method of the plant multi-component extract comprises the following steps: selecting a whole plant or organ tissues of the plant, cleaning with clear water, taking out, peeling to obtain peel, and pulping to obtain pulp; and adding a settling agent into the slurry, stirring, carrying out suction filtration to obtain filter residues, drying, and grinding to obtain the plant multi-component extract. The plant multi-component extract can be used for improving the anti-aging performance of asphalt. The plant multi-component extract modified asphalt is high in storage stability, the anti-aging performance of the asphalt can be obviously improved, meanwhile, the preparation method of the product is simple, convenient, efficient, low in cost, environmentally friendly and free of pollution, and obvious technical and economic benefits are achieved.

The utility model relates to the technical field of papermaking pulp screening, in particular to a screen frame for papermaking fiber separation, a beating device comprises a rotating rod, the rotating rod is rotationally connected between the inner walls of the two sides of a U-shaped frame, a plurality of beating rods are evenly and fixedly installed on the surface of the outer wall of the rotating rod, a sliding groove is formed in the surface of one side of the U-shaped frame, and the beating rods are arranged in the sliding groove. A sliding groove is formed in the U-shaped frame, a moving plate is slidably connected into the sliding groove, a supporting plate is fixedly installed on the surface of one side of the U-shaped frame, an electric telescopic rod is fixedly installed on the surface of the supporting plate, a connecting plate is fixedly installed on the surface of the moving plate, and a rack is fixedly installed on the surface of the end, away from the moving plate, of the connecting plate; and a gear is fixedly mounted on the surface of the outer wall of the rotating rod. According to the screening device, the problem that in the screening process of an existing screening device, slurry often blocks the interior of screen meshes, and the screening efficiency of the screen meshes becomes low is solved.

The embodiment of the utility model provides a bamboo pulp grading screening system which comprises at least two screening units connected in parallel, each screening unit comprises at least two pressure screens connected in series, each pressure screen comprises a screen plate used for separating pulp into long fiber pulp and white water, each screen plate comprises screen holes, the diameter of each screen hole is 0.6-1.1 mm, and the diameter of each screen hole is 0.6-1.1 mm. In the same screening unit, the ratio of the area of the screen plate of the pressurized screen located on the upstream to the area of the screen plate of the pressurized screen located on the downstream is 1: (0.55-0.8), the average length of obtained long fiber pulp is better than that in the prior art through the bamboo pulp grading screening system formed through the arrangement, meanwhile, the screening rate of medium and short fibers is greatly increased, and the system runs stably.

The invention discloses a two-stage slag separator tailing diluting and re-screening device, which relates to the technical field of tailing screening, and comprises a box body, a first screening cavity, a diluting cavity and a second screening cavity, a first screening assembly and a second screening assembly are arranged on the box body; the first screening assembly comprises a first connecting seat, a first screening seat, a first synchronous belt structure and a screening mesh belt; heavy impurities in tailings are screened through the arranged diluting assembly and the arranged first screening assembly, light impurities in the tailings are screened through cooperation of a first screening base, a first synchronous belt structure, a screening net belt and a liquid guide pipe, and the impurities are collected through cooperation of a negative pressure suction nozzle, a negative pressure pipe, negative pressure equipment and a collecting tank; according to the screening device, the supporting plate, the filtering base, the filtering piece, the filtering plate, the first air guiding piece, the second air guiding piece and the driving motor are arranged, collected impurities are cleaned, the first screening assembly does not need to be stopped, the screening effect of the first screening assembly is improved, and the using effect of the screening device is improved.

The invention discloses a preparation method and application of bamboo nanocellulose and bi-crosslinking hydrogel. The preparation method of the hydrogel comprises the following steps: (1) dispersing the bamboo nanocellulose; (2) preparing a lignin-Fe solution; and (3) preparation of the bi-crosslinked hydrogel: adding the bamboo nanocellulose suspension and acrylic acid into water, then adding ammonium persulfate and N, N '-methylene bisacrylamide, finally adding the lignin-Fe solution to obtain a precursor solution, and pouring the precursor solution into a mold to obtain the bi-crosslinked hydrogel. The moso bamboo is used as a raw material, cellulose is extracted from the plant which is extremely high in carbon sequestration capacity and rapid in production and then is processed into nano cellulose, a novel utilization way is provided for the moso bamboo, and the hydrogel prepared from the moso bamboo is good in environment friendliness, green, natural and non-toxic, can be in direct contact with skin, and has a good application prospect. And the application and development of the material in the fields of environmental protection, biomedical treatment, electronic skin, wearable sensors and the like are facilitated.

The invention discloses a preparation method of a nano-crystalline cellulose composite raw material containing an antibacterial agent, and relates to the technical field of material preparation, the preparation method comprises preparation of the nano-crystalline cellulose composite raw material, and the preparation method of the nano-crystalline cellulose composite raw material containing the antibacterial agent comprises the steps of raw material preparation, antibacterial agent loading and composite forming. The raw materials comprise a natural fiber raw material, tea polyphenol, a chitosan acetic acid solution, a nano cellulose suspension and plant essential oil, the natural cellulose raw material comprises wood pulp, bamboo pulp and cotton fibers, an antibacterial agent is loaded in-situ polymerization, and the composite molding comprises functional additive mixing and hot press molding drying. In the hot pressing process, nanocellulose molecular chains are rearranged and interwoven under the action of temperature and pressure, meanwhile, reinforcing agents such as lignin and the like are further fused with nanocellulose, and a glycerol plasticizer plays a role, so that the material has better flexibility and plasticity, and finally a compact blocky composite raw material is formed.

The invention relates to the technical field of pulping production, in particular to a spherical digester device for pulping. Comprising a fixing frame, a spherical heat preservation shell is arranged in the fixing frame, a spherical cooking shell is concentrically fixed in the heat preservation shell, rotating shafts are fixed to the two ends of the cooking shell, the rotating shafts penetrate through the heat preservation shell and are rotationally connected with the fixing frame, and a driving unit for driving the rotating shafts to rotate is arranged on the fixing frame. The cooking shell and the heat preservation shell are driven by the motor to rotate integrally, and a multi-dimensional mixed flow field is formed under the action of centrifugal force and gravity in combination with the baffle structures uniformly distributed on the inner circumference. The wood chips and the alkali liquor are repeatedly cut and dispersed by the baffles in the rolling process, the static accumulation and layering phenomena are broken, uniform permeation of fibers and the reaction liquor is achieved, and the cooking reaction time is greatly shortened.

The invention provides nano cellulose as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) carrying out heating reaction on a mixed solution containing a biomass material and a eutectic solvent, and filtering to obtain fibers; (2) mixing the fiber with a solvent, and performing ultrasonic treatment to form the nano cellulose; wherein the eutectic solvent comprises a hydrogen bond donor and a hydrogen bond acceptor, the hydrogen bond donor is selected from 2-aldehyde acetic acid and / or chloroacetic acid, and the hydrogen bond acceptor is selected from choline chloride. The preparation method provided by the invention can effectively reduce the cost and energy consumption for synthesizing the nano cellulose.

According to the method for separating the carbohydrate and the lignin from the lignocellulose provided by the embodiment of the invention, the lignin and the carbohydrate in the lignocellulose raw material are separated by utilizing the choline chloride eutectic solvent, and the lignocellulose raw material is subjected to pretreatment and subsequent separation under a mild condition; the choline chloride deep-eutectic solvent is simple to prepare, good in lignin and carbohydrate separation effect, safe and pollution-free.

The invention discloses a system for removing stickies from paper making pulp, belongs to the technical field related to paper production, and aims to solve the problems that in the prior art, materials with high viscidity, such as pulp with overhigh humidity, are easily adhered to a screen mesh or the inner wall of a centrifugal screen, so that the screening efficiency is reduced, even screen holes are blocked, and the normal screening operation is influenced. Comprising a shell, a round rod is rotationally connected to the shell, a packing auger is installed in a partial area of the round rod, a motor drives the round rod to drive the round rod to rotate, and the round rod can drive multiple sets of scrapers to rotate, so that centrifugal screening operation can be conducted on paper pulp, fluid except for adhesive is screened out, and meanwhile the size of the pulp is reduced. According to the paper pulp screening device, materials attached to an arc-shaped screen plate can be scraped, the materials in paper pulp can be prevented from being attached to the arc-shaped screen plate, the screening efficiency is relatively good, separation of a threaded sleeve and a round rod is utilized, a sleeve can drive a scraper to conduct dismantling work, and independent maintenance is facilitated.

The invention relates to the technical field of sand removing machines, and discloses a papermaking sand removing machine which comprises four stone tables and four main frames, each main frame is installed on the corresponding stone table, a smashing part is installed on the main frames and used for smashing tailing impurities obtained after paper pulp is subjected to sand removing, and a discharging part is installed on the smashing part and used for discharging the tailings impurities obtained after paper pulp is subjected to sand removing. The main frame is used for blocking and guiding tailing impurities after paper pulp sand removal to a crushing process, the precipitation part is mounted on the main frame and used for depositing the tailing impurities after paper pulp sand removal, the impurity removal part is mounted in the precipitation part, and the crushing part is used for crushing the tailing impurities after paper pulp sand removal, so that the impurities are uniform in size and easier to flow; according to the invention, impurities with different sizes are prevented from blocking the precipitation pipeline and the slag discharge pipeline, the crushed mud and sand impurities are uniform, the problems of pipeline blockage and discharge stagnation can be effectively reduced, and the smoothness and the discharge efficiency of the pipeline are improved.

The invention relates to the technical field of agricultural waste treatment, and relates to a composite material prepared by ultrasonic-assisted enzyme treatment of agricultural waste and a method. The method comprises the following steps: plant fiber pretreatment: adding grinding balls into a ball mill, and adding plant fiber powder into the ball mill; drying the sieved product for later use; preparing a buffer solution: dissolving citric acid and sodium citrate with deionized water to obtain an acidic buffer solution; performing ultrasonic-assisted enzyme treatment on fibers: putting the ball-milled plant fiber powder into a beaker, and adding deionized water; uniformly stirring the enzyme solution by using a stirring rod, and then carrying out ultrasonic treatment; centrifuging, taking out precipitate, and drying for later use; and preparation of the plant fiber / PBAT composite material: putting the mixed raw materials into a mold cavity by adopting a hot pressing method, and carrying out compression molding. According to the invention, the chestnut shell fibers are subjected to ball-milling composite ultrasonic-assisted enzyme treatment to obtain the micro-nano plant fibers, so that the plant fibers have the properties of micro-nano materials; the preparation process is simple, the cost is low, and the cost of the PBAT material is reduced.

The invention discloses a cleavable polysaccharide monooxygenase mutant FpLPMO9A-N160T and application of the cleavable polysaccharide monooxygenase mutant FpLPMO9A-N160T, and belongs to the field of enzyme engineering. The optimal temperature of the lytic polysaccharide monooxygenase mutant FpLPMO9A-N160T disclosed by the invention is 50 DEG C, the optimal pH is 5, and the enzymatic activity of the mutant FpLPMO9A-N160T is 10.8 times that of a wild type. The thermal stability of the lytic polysaccharide monooxygenase mutant is remarkably improved, IC50 is 101.1 min at the temperature of 50 DEG C and is 1.57 times that of a wild type, the activity of the mutant can be kept for a longer time at the high temperature, and better thermal stability is shown. The improvement has important significance on the expression of the LPMO in industrial application, especially in environments requiring high-temperature operation, such as biomass conversion, biofuel production and other processes. The higher thermal stability not only prolongs the service life of the enzyme, but also improves the efficiency and reliability of the enzyme in practical application.

The utility model relates to the technical field of papermaking equipment, in particular to a pressure screen bar structure which comprises a cylindrical screen cylinder, an upper flange and a lower flange are arranged at the two ends of the screen cylinder respectively, a reinforcing ring and middle rings are arranged on the outer wall of the screen cylinder, the reinforcing ring is arranged in the center of the outer wall of the screen cylinder, and a plurality of sets of middle rings are arranged in the axial direction of the screen cylinder at equal intervals. A plurality of bar bodies are fixed on the middle ring and are distributed in a circular array along the central axis of the middle ring, and each bar body comprises a fixed part fixedly connected with the middle ring, an extension part is arranged at one end, facing the rotor wing, of the fixed part, the end face of the extension part is inclined, and the end face of the inclined extension part is gradually close to the rotating direction of the rotor wing. According to the bar structure of the pressure screen, on the basis that the aperture ratio of the screen cylinder is guaranteed, vortexes are prevented from occurring, and therefore the yield is guaranteed.

The utility model discloses raw material cooking equipment for bamboo fiber production, which comprises a cooking box, the upper surface of the cooking box is movably hinged with a sealing cover through a hinge, the upper surface of the cooking box is fixedly connected with a preheating box, and the front surface of the preheating box and the front surface of the cooking box are jointly and fixedly communicated with a water replenishing valve. Two heating pipes are fixedly mounted in the cooking box, and a first water level sensor is arranged in the cooking box. The heating pipe is arranged in the cooking box to cook water and bamboo fiber raw materials in the cooking box, hot steam generated in the cooking process flows in the preheating box through the exhaust coil pipe, stored water is arranged in the preheating box, and water vapor and heat conducting fins passing through the exhaust coil pipe can heat the water in the preheating box. Water in the preheating box has a certain temperature when being supplemented to the cooking box, and meanwhile, water vapor passing through the exhaust coil pipe can be cooled, condensed and utilized, so that the utilization of water resources is reduced.

The utility model relates to the technical field of refined cotton, in particular to a refined cotton cooking device with a tail gas absorption mechanism, which comprises a base and a cooking pot, the cooking pot is arranged at the upper end of the base, a support frame is arranged on one side of the base, an adjusting mechanism is arranged at the bottom end of the cooking pot, a movable component is arranged in the adjusting mechanism, and the tail gas absorption mechanism is arranged on the movable component. An adjusting assembly is arranged at the bottom end of the cooking pot, a fixing plate is arranged in the adjusting assembly, a servo motor is arranged on one side of the fixing plate, a threaded rod is rotationally installed at the output end of the servo motor through a coupler, a limiting sleeve is arranged on the fixing plate, a sliding sleeve is arranged on the threaded rod, a movable support is arranged on the sliding sleeve, and a movable support is arranged on the movable support. A movable support is arranged on the base, a supporting rod is arranged on the movable support, a hinge is arranged at one end of the supporting rod, a treatment mechanism is arranged on one side of the base, a treatment tank is arranged in the treatment mechanism, an air inlet is formed in one side of the treatment tank, and filter cotton is arranged in the treatment tank.

The invention provides a permanent-magnet direct-drive pressurized screen without a transmission part, and belongs to the technical field of papermaking machinery. According to the structure, a barrel is fixedly connected to the interior of a shell, a vector permanent magnet motor is fixedly connected to the interior of the barrel, a bearing is arranged in the barrel, a main shaft of the vector permanent magnet motor is connected to the bearing, a mechanical seal is arranged at the position, penetrating through the barrel, of the main shaft of the vector permanent magnet motor, and a rotor is connected to the main shaft; a screen cylinder is fixedly connected in the shell and located on the periphery of the rotor, a channel is formed in the position, located on the periphery of the main shaft and the vector permanent magnet motor, in the barrel, and a water retaining ring is arranged at the position of a lower port of the channel. The rotor of the pressure screen is directly driven in the mode that the vector-controlled permanent magnet motor stretches out of the power shaft, the disassembly, assembly and maintenance efficiency and the equipment operation safety are improved, the coaxiality of the rotor and the screen cylinder is directly guaranteed, meanwhile, certain cost is reduced, and the technical advantages are outstanding.

The invention relates to the technical field of resources and environment, in particular to a method for pretreating lignocellulose by using a rumen microorganism dry method. The method comprises the following steps: crushing lignocellulose to 1-5cm, and filling the crushed lignocellulose into a sealed space; spraying microorganisms under an anaerobic condition according to a mass ratio of rumen microorganisms to lignocellulose volatile components of (0.015-0.03): 1, and controlling the water content of the system to be 30-60%; the pretreatment temperature is regulated and controlled to be 35-42 DEG C, the pH is 6.0-7.5, the pretreatment time is 10-14 days, so that the total abundance of the functional microorganisms Pseudocidovorax, Hallella and Prevotella is greater than or equal to 55%, and the three types of microorganisms respectively form strong interaction with specific companion bacteria; when the relative crystallinity of the lignocellulose is reduced by more than 15% and the volatile component is reduced by 10%, finishing the pretreatment; and performing process regulation and control according to the crystallinity and the reducing sugar yield when the pretreatment is performed for 10 days. The dry process is adopted, the bionic principle and the solid-state fermentation technology are combined, all-component gradient utilization of lignocellulose is achieved, a green solution is provided for industrial and high-value conversion of lignocellulose, and remarkable economic, social and environment-friendly benefits are achieved.

The utility model discloses paper pulp residue removing equipment for paper product manufacturing, and relates to the technical field of paper product manufacturing. The paper pulp box comprises a paper pulp box body, a pulp conveying pipe is connected to the paper pulp box body, a discharging pipe is connected to the lower surface of the paper pulp box body, a filtering and scraping assembly is connected to the paper pulp box body, a pipeline anti-blocking assembly is fixedly arranged on the lower surface of the paper pulp box body, and the pipeline anti-blocking assembly is in movable contact with the discharging pipe. Impurities in paper pulp can be filtered out through the filter screen plate, in order to avoid blockage of screen holes, the first motor can be started to enable the connecting rod to rotate, and the connecting rod drives the screw rod to rotate, so that the sleeve block can move along the fixed frame and drives the scraper to move, and the impurities on the filter screen plate are scraped off; and the collecting barrel can be detached by rotating a bolt, so that impurities in the collecting barrel can be cleaned.

The utility model discloses a tailing fiber recycling device for a deslagging section. The tailing fiber recycling device comprises a feeding tank, a first multi-section deslagging device, a transverse deslagging device, a second multi-section deslagging device, a white water tank, a slag tank and an accepted pulp tank, a feeding hole of the first multi-section slag separator is communicated with the discharging end of the feeding tank, and a slag outlet in the bottom of the first multi-section slag separator is communicated with a feeding hole of the transverse slag separator; preliminary deslagging and filtering are carried out through the first multi-section deslagging device, filtered slag slurry enters the transverse deslagging device, and white water is pumped into the transverse deslagging device through the white water tank, so that the slag slurry is rotationally separated in the transverse deslagging device; and the formed accepted pulp is automatically returned to the first multi-section slag separator, is discharged from the accepted pulp opening after being subjected to slag discharge, and further fiber recovery is realized through mutual cooperation of the transverse slag separator, the first multi-section slag separator and the second multi-section slag separator, so that the fiber content in the slag pulp is lower, and the utilization rate of the fiber is improved.

The invention relates to the technical field of battery diaphragms, in particular to a wood fiber composite diaphragm and a preparation method thereof. According to the diaphragm, renewable softwood pulp is used as a basic raw material, after aldehyde groups are introduced through sodium periodate oxidation, tannic acid, zinc acetate and cystamine are utilized to synergistically construct a zinc coordination network functional layer; then, molecular crosslinking with methoxypolyethylene glycol, polyethylene glycol, hexamethylene diisocyanate, gamma-aminopropyltriethoxysilane and nano silicon dioxide is realized under the action of a catalyst; and finally, the paper-making and hot-pressing processes are performed to prepare and mold. The diaphragm is particularly suitable for being applied to high-safety and high-performance aqueous metal zinc batteries, and an innovative technical path is provided for industrialization and green upgrading of zinc ion battery diaphragm materials.

The invention discloses a fiber classifying screen for pulping and a process thereof, and relates to the technical field of papermaking, the fiber classifying screen comprises a treatment box, a positioning plate is mounted in the treatment box, the lower end of the positioning plate is slidably connected with a screening plate, and a driving motor is mounted at the upper end of the side of the treatment box; and the output end of the driving motor extends into the treatment box and is provided with a shifting mechanism for separating long and short fibers. According to the fiber classifying screen for pulping and the technology thereof, the output end of the driving motor rotates and drives the reciprocating screw rod to rotate, the reciprocating screw rod is in threaded connection with the sliding block, and therefore the sliding block is driven to move; the sliding block can drive the fixing plate and the fixing strip to stir paper pulp stored at the upper end in the treatment box when moving, the paper pulp is screened in a classified mode through the screening plate, the paper pulp at different positions in the treatment box can be stirred through the fixing strip, and therefore the situation that fibers with different lengths cannot be separated due to lap joint can be effectively avoided.