379results 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 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 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.

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.

The utility model discloses a paper pulp rotational flow high concentration desander relates to papermaking equipment technical field, the paper pulp rotational flow high concentration desander includes feed tee joint, pulp outlet pipe, conical liner, shell and sediment tank, feed tee joint's pulp inlet channel is arranged along feed tee joint's side wall tangential direction, feed tee joint's barrel inner wall is fixed with the helical blade that is distributed along the axial direction, feed tee joint's barrel inner wall is fixed with feed tee joint's feed tee joint's barrel inner wall is fixed with feed tee joint's feed tee joint's feed tee joint's feed tee joint's feed tee joint's feed tee joint's feed tee joint's feed tee joint's barrel inner wall. The spiral blades surround the circumferential direction of the slurry outlet pipe arranged in the axial direction, the inner wall of the feeding three-way barrel, the spiral blades and the pipe wall of the slurry outlet pipe define a spiral downward flow guide channel, the rotating direction of the flow guide channel is consistent with the cut-in direction of the slurry inlet channel, and conical spiral edges distributed in the axial direction are fixed to the inner wall of the conical container. The spiral blades, the flow guide channel and the conical spiral edges are arranged, slurry flows down along the flow guide channel after entering the sand remover in the tangential direction, the stability of rotational flow is improved, the slurry with stable rotational flow enters the conical container and is guided by the conical spiral edges, the inertia of centrifugal force and the stability of the direction are kept, and stable separation of impurities and the slurry is guaranteed.

The invention relates to a sieve device (1) with at least one retention element (3, 13, 4, 14) for cleaning a suspension of contaminants, wherein the sieve device (1) comprises a shaft that can be driven rotatorily by a drive, wherein at least one retention element extends radially from the shaft, wherein flowable spaces (8) are formed by the at least one retention element (3, 13, 4, 14) and a sieving effect is provided by the flowable spaces (8).

The invention belongs to the technical field of wormwood material treatment, and particularly relates to a physical preparation method and application of wormwood active micro-nano cellulose, wormwood processing waste is pretreated, liquid nitrogen ultra-low temperature crushing is adopted, and the ultra-low temperature can avoid structural damage and performance change of cellulose due to too high temperature; then, in the multi-physics field coupling dissociation process, the stress effects of high-frequency vibration of an ultrasonic field, a shearing field and a freeze-thaw cycle field cooperate to effectively destroy the aggregation state structure of the cellulose, so that efficient dissociation of the cellulose is realized, the dispersity and activity of cellulose nanofibers are improved, and then directional self-assembly is performed through an ice crystal template method, so that the cellulose nanofibers are obtained. The preparation method comprises the following steps: introducing cellulose nanofibers to form a bionic porous structure, accurately regulating and controlling the pore structure and form, and finally obtaining wormwood active micro-nano cellulose by combining a high-pressure micro-jet homogenizing process, so that the material has a relatively large specific surface area and excellent mechanical properties, and the bioactive components of wormwood are reserved to the greatest extent through an innovative physical synergy technology.

The utility model discloses a poplar chemi-mechanical pulp i-CTMP pulping system which comprises a steaming bin, a metering spiral scale is arranged at an outlet in the bottom of the steaming bin, the output end of the metering spiral scale is communicated with a reversing conveying structure, the output end of the reversing conveying structure is communicated with a spiral feeder, the output end of the spiral feeder is communicated with a transverse pipeline of a T-shaped pipe, and the transverse pipeline of the T-shaped pipe is communicated with a horizontal pipeline of the T-shaped pipe. A non-return structure is arranged in the transverse pipeline, a vertical pipeline of the T-shaped pipe is communicated with the high-temperature softening pipe, the output end of the high-temperature softening pipe is communicated with the balancing bin H, and a side feeding spiral conveyor is arranged at a side output port of the balancing bin H. The metering spiral scale conveys materials conveyed by the steaming bin into the spiral feeder through the reversing conveying structure, the materials are extruded into material plugs in the spiral feeder, the material plugs are conveyed into the T-shaped pipe, then the material plugs enter the high-temperature softening pipe to be subjected to high-temperature steaming and softening, the softened material plugs enter the balancing bin, and chemical medicines are pre-placed and subjected to high-temperature softening, so that the quality of the chemical medicines is improved. And the pulping energy consumption of the subsequent high-concentration pulping machine is reduced.

The present application belongs to the technical field of fruit by-product processing, and particularly relates to a method for extracting cellulose, pectin and polyphenol from pear by-product. The present application utilizes the thermo-mechanical-chemical effect of steam explosion to treat the pear by-product through steam explosion, so that most of hemicellulose and lignin can be removed, and the cellulose, pectin and polyphenol can be efficiently and rapidly extracted, thereby shortening the production cycle of the cellulose, pectin and polyphenol and improving the efficiency. Furthermore, the present application uses a combination of choline chloride and ethanol as a low eutectic solvent, and compared with other types of hydrogen bond acceptors and hydrogen bond donors, the polyphenol extraction effect is the most significant. The present application provides a method for laying a foundation for further development and utilization of pear residue cellulose, pectin and polyphenol, and improves the comprehensive utilization rate of pear processing by-products.

The utility model relates to the technical field of deslagging separation, and discloses a deslagging separation device for paper pulp purification, which comprises a main body assembly and a base, a shell is fixed on the base, and a discharge port is fixed in the base; the discharging assembly is located on one side of the discharging port and comprises a discharging piece, a pushing piece is arranged on the discharging piece, the discharging piece comprises a discharging plate arranged at the bottom of the discharging port, and a side plate is fixed to one side of the discharging plate. The discharging device has the advantages that the baffle capable of being triggered to rotate and the rotating plate are arranged on the discharging plate, when waste materials are gathered to a certain amount on one side of the baffle, gravity triggers the baffle to rotate, the rotating plate is driven to synchronously act, the accumulated waste materials are automatically pushed to fall down, and after the collected waste materials are discharged, the baffle and the rotating plate can automatically reset. And through the combined design of the baffle and the side plates, splashing waste materials during discharging can be effectively blocked, the waste materials are concentrated on one side of the baffle, and the situation that the waste materials are scattered to pollute a working area is avoided.

The application discloses a mica sheet pulping device and method, and belongs to the technical field of mica papermaking, which comprises a reaction kettle, a first filtering device and a second filtering device which are sequentially arranged, and mica liquid after reaction of the reaction kettle is filtered through the first filtering device and the second filtering device in sequence; wherein the reaction kettle comprises a feeding piece arranged in the inside, the bottom end of the feeding piece is close to the bottom wall of the reaction kettle, and a plurality of discharging parts are arranged on the surface of the feeding piece and used for introducing the reagent into the inside of the reaction kettle; the technical effect achieved by the improved scheme is that: after the concentrated sulfuric acid is introduced, the concentrated sulfuric acid and the mica are allowed to react, the reaction effect is improved, the residual sulfuric acid in the introduction pipeline is reduced, the subsequent filtering operation is facilitated, when the residues are cleaned, the bottom plate is pulled, all the residues can be taken out at one time, the efficiency is higher, and the direct contact of the hands of workers can be reduced.

This utility model discloses a papermaking tail pulp recovery device, relating to the technical field of tail pulp recovery equipment. It includes a primary separation cylinder, a pulp inlet pipe, and a primary overflow pipe. A separating cylinder, corresponding to and connected to the inlet end of the primary overflow pipe, is fixed on the inner wall of the top of the primary separation cylinder. It also includes a reinforced buffer mechanism to reduce the impact of the tail pulp on the separating cylinder. The reinforced buffer mechanism includes a damping plate attached to the wall of the separating cylinder, an mounting part for conveniently assembling the damping plate to the cylinder body, and a reinforcing part for increasing the connection strength between the separating cylinder and the inner wall of the top of the primary separation cylinder. The pulp inlet pipe corresponds to the damping plate. This utility model, through the installation of the damping plate, can effectively suppress the shaking caused by tail pulp scouring, reduce the stress at the connection between the separating cylinder and the primary separation cylinder, and reduce the risk of the separating cylinder falling off due to long-term impact.

The invention discloses cellulose-based aerogel as well as a preparation process and application thereof, and relates to the technical field of ecological restoration of water bodies. The preparation process of the cellulose-based aerogel comprises the following steps: removing impurities from garden wastes, washing, drying and crushing to obtain raw material powder; extracting cellulose from the raw material powder by coupling physical, chemical and enzymolysis modes; the preparation method comprises the following steps: loading carboxyl on cellulose, and combining copper ions, quaternary ammonium salt cations and a high-molecular polymer containing amido with the carboxyl to obtain a gel material; the gel material is subjected to freeze drying treatment, and the cellulose-based aerogel is obtained. The prepared aerogel has excellent effects of organic matter adsorption, heavy metal adsorption and algae resistance.

The utility model discloses a papermaking industry press master screen cylinder which comprises a fixing frame and a screen cylinder body, the screen cylinder body is installed in the middle of the fixing frame through a conveying mechanism, the papermaking industry press master screen cylinder further comprises an anti-blocking mechanism, and the anti-blocking mechanism is located at the bottom of the fixing frame and used for sweeping and removing adhered paper pulp; the cleaning assembly is located on the side wall of the anti-blocking mechanism and used for flushing and cleaning the adhered paper pulp; according to the scheme, by arranging the anti-blocking mechanism, paper pulp adhering to the inner wall of the screen cylinder can be conveniently and automatically cleaned and removed, so that the situation that screen seams are blocked due to the fact that the paper pulp adheres to the inner wall of the screen cylinder is avoided, and then the purposes of conveniently and normally screening impurities and effectively improving the screening efficiency of the impurities are achieved; and by arranging the cleaning assembly, the side wall of the screen cylinder can be conveniently subjected to water spraying cleaning, and therefore the purposes that the anti-blocking effect is effectively improved, and the screen cylinder can be conveniently cleaned in the later period are achieved.

The present disclosure is directed to rotors for pressure screens with cylinders for screening solid contaminants from a solid slurry. The rotor comprising a cylindrical hub, at least one foil spaced radially outward from the cylindrical hub, and at least one strut coupling the at least one foil to the cylindrical hub, wherein the at least one strut is a forward-swept strut having a forward edge. Additionally disclosed are methods of using the rotor.