118 results about "Pulp treatment" patented technology

The invention relates to the technical field of papermaking wastewater treatment, in particular to a waste pulp residue treatment device for raw paper production, which comprises waste pulp treatment equipment for raw paper production, the waste pulp treatment equipment comprises a treatment tank, and the top side of the treatment tank is provided with automatic adding equipment matched with a stirring assembly for use. And driving equipment matched with the automatic adding equipment for use is mounted on the side wall of the treatment tank. According to the waste pulp residue treatment device for raw paper production, the stroke of driving equipment is prolonged, the displacement of the sliding frame is increased, so that the sliding base is pushed to act, the lifting table is actively triggered to ascend and descend through the connecting rod, the dosing action and the stirring strength are dynamically bound, automatic dosing is achieved when the stirring requirement is high, and invalid dosing is avoided; in addition, the lifting platform drives the stirring rod to rotate and axially reciprocate, waste slurry fiber agglomerates are effectively scattered, precipitation prevention is achieved, meanwhile, longitudinal eddy current can be formed through axial reciprocating of the stirring rod, agent diffusion is enhanced, the mixing efficiency is improved, the reaction period is shortened, and energy loss is reduced.

The invention belongs to the technical field of tailing pulp treatment, and particularly relates to a settling pond for dry discharge of tailings, which comprises a slag discharge assembly, the slag discharge assembly is mounted on the inner side of a slag baffle, the slag discharge assembly comprises a slag discharge groove and a slag guide plate, the upper end of the slag discharge groove is open, and the slag guide plate is arranged on the lower end of the slag discharge groove. A surrounding plate extending in the first direction is arranged on the side, away from the slag blocking plate, of the slag discharging groove, and the first direction is opposite to the rotating direction of the scraping arm. A containing part used for containing scum is formed between the coaming and the scum baffle, the scum guide plate is horizontally arranged, and the scum guide plate is movably arranged in the containing part in the vertical direction; the second slag scraping plate is movably arranged on the scraping arm in the vertical direction, and the slag discharging assembly is located on the path where the second slag scraping plate rotates along with the scraping arm. According to the device, scum is pre-collected through the coaming, then the scum is completely guided into the scum discharge groove through cooperation of the scum guide plate and the second scum scraping plate, the scum is prevented from overflowing, and the scum discharge efficiency is improved.

This application provides a method for applying a plant-extracted bioenzyme to paper pulp treatment. Specifically, it involves applying plant-extracted peroxidase to the pre-bleaching delignification treatment of mechanical pulps from bamboo, reeds, and eucalyptus using H2O2. Key parameters in the treatment process, such as enzyme dosage, treatment time, and H2O2 addition, are optimized. The optimal treatment scheme is determined by measuring the total lignin and surface lignin content and fiber morphology of the treated samples. This optimal scheme is more effective in improving the fiber strength and brightness of the treated pulp compared to conventional enzyme treatment methods. Furthermore, molecular docking simulations are performed using a model of the plant-extracted peroxidase and lignin model compounds (LMCs) with different degrees of polymerization to obtain information on the interaction between the enzyme and LMCs, revealing the mechanism of action between peroxidase and lignin. This provides reliable evidence and technical reference for the feasibility of using plant-extracted peroxidase to remove surface lignin from mechanical pulp and promote subsequent H2O2 bleaching.

The invention discloses a production process of a recycled waste paper papermaking board, and belongs to the field of recycled paper products. The recycled waste paper papermaking board comprises the following components: 80-95 parts of waste paper pulp, 3-10 parts of reinforced fibers, 1-5 parts of a reinforcing agent, 0.5-3 parts of a waterproof agent, 2-6 parts of an adhesive, 3-8 parts of a filler and 0.1-2 parts of an antibacterial agent. The production process comprises the following steps: waste paper is crushed and subjected to high-temperature soda boiling for impurity removal, and waste paper pulp is prepared; adding reinforced fibers, uniformly stirring, and performing fiber pulping treatment; adding the reinforcing agent, the waterproof agent, the adhesive and the filler, and continuously stirring for 10-20 minutes to uniformly disperse; a wet forming process is adopted, and the slurry is evenly spread and then pressed and formed; and after drying, an antibacterial agent is applied to the surface to improve durability. By optimizing the proportion of the waste paper pulp, the reinforcing agent and the waterproof agent, the strength, the water resistance and the durability of the papermaking plate are improved, and the papermaking plate is suitable for the fields of packaging, building templates and environment-friendly plates and has good recycling value and environment-friendly benefits.

The invention relates to the technical field of soft tissue production, and discloses a soft tissue production process method which comprises the following steps: S1, raw material selection: selecting a mixture of long fibers, short fibers, regenerated cellulose fibers and low-melting-point fibers as raw materials; s2, slurry preparation: performing pulping treatment on the selected fiber raw materials through a pulping machine, and controlling the pulping concentration and time; s3, forming: diluting the pulp to a proper concentration, and uniformly distributing the diluted pulp on a forming net through a paper machine; s4, dehydrating, namely removing part of water in the slurry through a vacuum suction box; s5, drying, wherein low-temperature airflow drying is conducted through air flotation drying equipment; s6, surface treatment: spraying a softening agent solution on the surface of the paper; and S7, winding. By using diethanolamine DEA and reasonably proportioning regenerated cellulose fibers and low-melting-point fibers, the softness of the tissue is remarkably improved, and after softening treatment and calendaring treatment, the effect of remarkably improving the softness and hand feeling of the tissue can be achieved.

The utility model relates to the technical field of decorative paper production, in particular to slurry treatment equipment for decorative paper production, which comprises a mixing box, a plurality of protective covers are fixed on the outer bottom wall of the mixing box, and an air bag column is communicated and hermetically fixed on the bottom wall of the mixing box in each protective cover. Each protective cover is fixedly provided with an air guide pipe in a communicating mode, a flow dividing pipe is jointly fixed to the multiple air guide pipes, and the flow dividing pipe is fixedly provided with a ventilation pipe in a communicating mode. When the slurry mixing device is used, slurry in the mixing box can be mixed, and the plurality of air bag columns are soft, so that long fibers in the slurry cannot be broken in the mixing process, and the toughness of decorative paper subsequently processed by the slurry is further ensured.

The utility model relates to equipment for cotton pulp treatment. The equipment comprises a pulp distributing mechanism, a pulp distributing mechanism and a pulp distributing mechanism, the pulp separating mechanism is used for carrying out solid-liquid separation on the cotton pulp; the fine material mechanism is used for scattering or smashing the wet cotton material subjected to solid-liquid separation; a material transferring mechanism; and the conveying device is used for conveying the scattered or smashed wet cotton materials into the drying device for drying treatment. According to the scheme provided by the utility model, the cotton pulp can be adjusted according to the concentration of the conveyed cotton pulp, so that the concentration of the cotton pulp entering the pulp separating mechanism is kept consistent, the conveyed wet cotton is uniform, and the reliability and the stability of production are ensured.

The invention discloses paper processing equipment, a paper preparation method and paper, relates to the technical field of papermaking, and aims at solving the problems that waste is large during paper changing, and white water treatment burden is large. The paper processing equipment comprises a pulp processing part, a paper forming part, a dyeing part and a drying part which are connected in sequence; the dyeing part comprises two dyeing rollers which are oppositely arranged and is used for dyeing the two surfaces of the base paper dried by the paper forming part; the drying part comprises a first drying device and a second drying device, and a water outlet of the first drying device is connected with a water inlet of the second drying device.

The present application relates to wet pressing moulding technical field, specifically to a kind of plant fiber paper pulp moulding and modified starch mixed moulding tableware production process, including the present application relates to a kind of plant fiber paper pulp moulding and modified starch mixed moulding tableware production process.The process first year of age Gramineae plant fiber pulp board is carried out pulping treatment, so that it has reasonable fiber knapping degree, then mixed configuration and dispense pulp concentration, during applying fluoride-free oil-proof agent to improve pulp quality.After uniform stirring continuously, prevent pulp fiber deposition, pulp is injected into forming mould, plant fiber is evenly distributed by vacuum effect, while excess moisture is backflowed, reaches about 70% moisture content.The process improves the stiffness of product by spraying process technology, which can be increased by 57% at most.The application of modified starch spraying surface process also avoids the problems of sizing filterability, blocking and sticking in pulp.The application of modified starch greatly improves the production efficiency of product.

The invention belongs to the technical field of electrolytic aluminum ash treatment, and discloses an electrolytic aluminum ash harmless treatment device which comprises a raw material preparation reaction system and an ore pulp treatment system, and the raw material preparation reaction system comprises a semi-finished product ash bin, a first calcium chloride tank, a raw material saline water tank, a batching tank and a reaction tank; the ore pulp treatment system comprises a vacuum belt filter, a light salt brine tank, a second calcium chloride tank, a strong salt brine tank, an alkali liquor tank, a sediment slurry tank, an air compressor and an MVR evaporator. According to the method, soluble calcium salt is obtained by utilizing the fly ash and diluted hydrochloric acid, calcium chloride reacts with fluoride in the electrolytic aluminum ash to obtain calcium fluoride sediment, most fluorine is removed, the phenomena of corrosion and scaling blockage of an MVR pipeline are greatly reduced, the service life of equipment is prolonged, meanwhile, the salt content is increased through light salt brine circulation enrichment, and the MVR energy consumption is reduced.

The invention relates to a thickener heat exchange system, and belongs to the technical field of ore pulp treatment. Comprising a first heat exchange assembly and a second heat exchange assembly. The first heat exchange assembly and the second heat exchange assembly are both arranged in the thickener; the first heat exchange assembly and the second heat exchange assembly are internally provided with heat exchange media. The heat exchange medium is a reaction medium from a fission bin, and the heat exchange medium flows back to the fission bin after completing heat exchange in the thickener. The waste heat utilization of the fission bin and the ore pulp cooling process of the thickener are combined into a whole, so that not only is the equipment resource saved, but also the energy consumption of the system is obviously reduced. The viscosity of the ore pulp can be reduced by properly increasing the temperature of the ore pulp, the flowability of solid particles in the ore pulp is improved, the particles can settle to the bottom more quickly, and therefore the solid-liquid separation efficiency of the thickener is improved.

The invention belongs to the field of tooth and dental pulp, and particularly relates to a tooth and dental pulp treatment whole-process simulation tooth and jaw model which comprises an upper jaw model, an upper jaw base, an upper jaw joint, a lower jaw model, a lower jaw base, a lower jaw joint, a connecting device, a neck joint and a tail fixing device. The lower jaw model comprises a lower jaw shell, a movable fine adjustment module and extracted teeth; the lower jaw shell is filled with a gel material capable of absorbing water; the movable fine adjustment module is a detachable fine adjustment module. The device can quickly fix and replace human isolated teeth, also can restore the adjacency relation of the isolated teeth, the periodontal microenvironment and the moist conductive environment around the tooth root, can highly simulate the physiological conditions of the isolated teeth in dentition and jaw bone, is suitable for various teaching trainings such as tooth pulp disease microscopic root canal treatment, tooth restoration, microscopic root apex surgery and the like, and has a wide application prospect. And the application scene is greatly widened.

The invention belongs to the technical field of wolframite flotation tailing sedimentation, and particularly relates to a wolframite tailing pulp treatment method which comprises the following steps that when the temperature is larger than or equal to 10 DEG C, a polyaluminum chloride solution is prepared; when the temperature is greater than or equal to 15 DEG C, preparing a polyacrylamide solution; then adding the polyaluminum chloride solution into the wolframite tailing pulp with the benzhydroxamic acid concentration of (5 + x) mg / L, uniformly stirring, then adding the polyacrylamide solution, uniformly stirring, and then carrying out flocculating settling; wherein the adding amount of the polyaluminum chloride in each cubic meter of the wolframite tailing pulp is (150 + 10x) g, the adding amount of the polyacrylamide in each cubic meter of the wolframite tailing pulp is (70 + 2x) g, and x is more than or equal to 0 and less than or equal to 5. According to the technical scheme, the dosage of the flocculating agent can be effectively reduced, and the tailing pulp treatment cost is reduced; loss of wolframite metal products during recycling of overflow water is effectively reduced; the settling rate of suspended matters is obviously improved, the content of the suspended matters in the overflow water is effectively reduced, and the muddy flow of the thickening pool is avoided.

The invention provides a high-performance insulating ultrathin vulcanized fiber paperboard preparation device and process, and relates to the technical field of fiber paperboard preparation, the high-performance insulating ultrathin vulcanized fiber paperboard preparation device comprises a plurality of fixed supporting legs, and the fixed supporting legs are fixedly connected to the lower end face of a repulping tank; the fixed plate is fixedly connected to the inner side of the upper end of the pulping tank body; the plurality of fixed side columns are fixedly connected to the inner side of the pulping tank body; the fixed bottom plate is fixedly connected to the inner sides of the multiple fixed supporting legs, and the problems that in the material repulping treatment stage of an existing ultra-thin vulcanized fiber paperboard preparation device, low-concentration repulping and high-concentration repulping need to be completed through different devices, and in the actual production process, in order to meet the requirements of repulping of different concentrations, the repulping efficiency is greatly improved are solved. The problems that in the prior art, various special pulping devices have to be purchased, the device purchasing and maintaining cost is increased, more space resources are occupied are solved, the using cost is reduced, and occupied space resources are reduced.

The invention discloses a paper pulp treatment device for corrugated paper production, and belongs to the technical field of paper pulp treatment. A paper pulp processing device for corrugated paper production comprises a preparation assembly used for mixing initial paper pulp and steam, a coarse grinding assembly used for coarse grinding of the initial paper pulp and a fine grinding assembly used for fine grinding of the coarse grinding paper pulp, and further comprises a buffering assembly arranged between the coarse grinding assembly and the fine grinding assembly. The buffer assembly is used for carrying out buffer storage and scattering on paper pulp subjected to coarse grinding, the coarse grinding assembly comprises a first compensation assembly, and the fine grinding assembly comprises a second compensation assembly; according to the invention, dynamic compensation can be respectively carried out on the grinding discs of the coarse grinding assembly and the fine grinding assembly through the arranged compensation assembly, and the problem that the grinding effect is influenced by gap increase caused by grinding surface abrasion is avoided, so that the problem that grinding does not reach the standard due to the gap increase after the grinding surface is abraded in the prior art is solved.

The utility model discloses an anti-winding structure of a defibering pump, and belongs to the technical field of papermaking pulp treatment. The anti-winding structure of the defibering pump comprises a radial annular gap formed between an impeller and a pump rear end cover which are coaxial, and further comprises a blocking ring coaxial with the radial annular gap, the blocking ring is fixed to the pump rear end cover through the ring fixing end of the blocking ring, and after the blocking ring blocks the radial annular gap in an annular mode, the blocking ring is fixed to the pump rear end cover. A sealing water cavity for sealing water of the machine seal on the pump shaft is formed, and while the machine seal is formed, the pump shaft is prevented from being wound with plastic skin, packaging plastic ropes, packaging iron wires and other impurities. The problem that in the prior art, in the slurry treatment process of a defibering pump, impurities are prone to being wound around a pump shaft, and consequently a motor is overloaded is solved.

The utility model discloses a pulp mixing device of a mixed pulp disc mill. The pulp mixing device comprises an incoming material end, an incoming material signal identification assembly, a repulping assembly, a high-concentration slag removal assembly, an electromagnetic reversing assembly, a first paper pulp treatment pipeline, a second paper pulp treatment pipeline, a third paper pulp treatment pipeline, a surface layer mixing pool and a surface layer pulp forming pool, the bottom of the pulping assembly is communicated with a feeding port of the high-concentration slag removal assembly, the electromagnetic reversing assembly is arranged on an accepted pulp port of the high-concentration slag removal assembly, and the first paper pulp treatment pipeline, the second paper pulp treatment pipeline and the third paper pulp treatment pipeline are all communicated with the electromagnetic reversing assembly; the first paper pulp processing pipeline, the second paper pulp processing pipeline and the third paper pulp processing pipeline are used for conducting defibering and disc grinding on fibers with different lengths respectively, so that paper pulp with fibers with the same length is produced, the proper beating degree of finished pulp is achieved, produced paper is good in smoothness, and the quality is improved.

The invention relates to the technical field of hydrocyclones, in particular to a hydrocyclone device which comprises a conical shell, a first gear is fixedly connected to the output end of a gear motor, a rotating pipe is rotatably connected to a mounting frame, a second gear is fixedly connected to the rotating pipe, and the second gear is in meshed connection with the first gear. The rotating pipe is connected with a material pushing mechanism used for preventing material residues from being accumulated and blocked at the joint of the conical shell and the discharging pipe. After the rotating pipe rotates, the rotating pipe is tangent to released ore pulp, tangential force is generated between the ore pulp and the inner wall of the rotating pipe and impacts the inner wall of the rotating pipe, so that particle impurities cannot be bonded to the inner wall of the rotating pipe, and the inner wall of the rotating pipe cannot be blocked; and meanwhile, after the pushing mechanism rotates, the joint of the conical shell and the discharging pipe is stirred, the upper end of the discharging pipe cannot be blocked, separated particle impurities can be continuously released during ore pulp treatment, and blocking cannot be caused.

The invention discloses waste slurry treatment equipment and method, and the equipment comprises a waste slurry pool which is used for collecting and preliminarily precipitating waste slurry, and reducing the load of subsequent treatment equipment; the horizontal screw centrifuge is used for primarily separating the waste slurry to separate out most solid particles; the dry flocculation powder coagulant preparation unit is used for preparing a dry flocculation powder coagulant and adding the dry flocculation powder coagulant into the waste slurry to promote flocculation and improve the solid-liquid separation effect; and the plate-and-frame centrifuge is used for deeply separating the flocculated waste slurry to obtain high-purity solid and liquid. According to the waste slurry treatment equipment and method, through the synergistic effect of the waste slurry pool, the horizontal screw centrifugal machine, the dry flocculation powder coagulant preparation unit and the plate-and-frame centrifugal machine, efficient treatment and resource recovery of waste slurry are achieved, and remarkable economic and environmental benefits are achieved.

The invention provides a method for producing high-bulk and thick kitchen paper by adopting bamboo pulp, and belongs to the technical field of papermaking, and the method comprises the following steps: S1, feeding bamboo pulp fibers into a pulping machine for pulping treatment to obtain pretreated pulp; s2, diluting the pretreated pulp with white water in a pre-papermaking pulp tank, and adding a wet strength agent to obtain finished pulp; s3, spraying the finished pulp to an included angle area of a forming net and a blanket, and then forming a wet paper sheet after extrusion dehydration of the forming net and the blanket, suction dehydration of a vacuum suction roller, shoe type press dehydration and ultrahigh vacuum shaping dehydration; s4, the wet paper sheet is sequentially subjected to high-temperature gas hood recovery hot air penetration, a drying cylinder and high-temperature gas hood hot air drying treatment, and paper is formed; and S5, wrinkling the dried paper by using a scraper, scraping the wrinkled paper away from the drying cylinder, and winding the wrinkled paper into a mother roll after the wrinkled paper enters a winding part through an arc-shaped roller, so as to obtain the kitchen paper. The kitchen paper is produced from 100% bamboo pulp or full bamboo pulp raw materials, and is high in bulk, good in water absorption and excellent in softness.

The present application relates to the technical field of papermaking equipment, and discloses an environment-friendly papermaking equipment and a papermaking process thereof, which comprises an equipment shell, a detachable cover body is arranged on the top of the equipment shell, a pulp inlet is arranged on the cover body, a pulp filtering mechanism is arranged on the upper portion of the equipment shell, a multi-stage adjusting type grinding mechanism is arranged on the middle upper portion of the equipment shell and connected with the pulp filtering mechanism, a multi-directional pulp mixing mechanism is arranged on the middle portion of the equipment shell, a cyclone mechanism is arranged on the lower portion of the equipment shell, a pulp outlet is arranged on the bottom of the equipment shell, a driving mechanism is arranged on the bottom of the equipment shell, the driving mechanism is drivingly connected with the cyclone mechanism and the multi-directional pulp mixing mechanism, and the driving mechanism is drivingly connected with the multi-stage adjusting type grinding mechanism through a linkage mechanism. The present application has the advantages of compact structure, low energy consumption, energy saving and environmental protection, and good pulp treatment effect.

The invention belongs to the technical field of cellulose, and particularly relates to type II bacterial cellulose slurry as well as a preparation method and application thereof. Compared with the prior art, the preparation method has the advantages that the bacterial cellulose gel is modified to be converted into a cellulose type II from a cellulose type I, the stacking structure and the hydrophilic performance of a bacterial cellulose molecular chain are changed, and the bacterial cellulose pulp from the nanometer level to the millimeter level is further obtained through pulping treatment; the product is milky white, odorless, tasteless, controllable in granularity and adjustable in hydrophilic performance, can be quickly dispersed after being added with water and stirred, and can be applied to the fields of preparation of degradable materials, reinforcement of composite materials, papermaking and packaging industry, biomedicine and health, daily chemical industry, cosmetics and the like; and the preparation method greatly reduces the dosage of the poor alkali solvent and the recovery energy consumption, is simple in process, does not need special equipment, and is green and environment-friendly.

The utility model relates to the technical field of corrugated paper production devices, in particular to an efficient pulping device for corrugated board production, which comprises a crushing box, a flow dividing seat is arranged on the end face of the bottom of an inner cavity of the crushing box, and a feeding port communicated with the inner cavity of the crushing box is formed in the top of one side of the crushing box. A crushing motor is arranged on the top end face of the crushing box, the output end of the crushing motor extends into an inner cavity of the crushing box and is provided with a rotating shaft rotationally connected with the flow dividing base, a plurality of stirring connecting rods evenly distributed in a surrounding mode are arranged on the outer side of the bottom of the rotating shaft, and driving stirring plates are arranged at the bottoms of the stirring connecting rods. A plurality of scrapers parallel to the rotating shaft are arranged on the outer side of the rotating shaft, a filter box is arranged at the lower end of the crushing box, and a conveying box is arranged on one side of the crushing box. The pulping efficiency of paper pulp raw materials is improved, paper pulp which does not meet the discharging requirement can be filtered and screened for repeated pulping treatment, and the discharging quality of the paper pulp is greatly improved.

The invention provides a manufacturing method of a high-performance corrugated board, which comprises the following steps of: crushing a waste paper raw material into coarse pulp, performing wet classification on the coarse pulp by adopting screening equipment, and separating out long fiber pulp with the average fiber length of more than or equal to 50mm and short fiber pulp with the average fiber length of less than 50mm; carrying out light pulping treatment on the separated long fiber pulp; adding a reinforcing adhesive into the pretreated long fiber slurry while stirring to prepare core layer slurry; adding a functional auxiliary agent into the obtained short fiber slurry to prepare surface layer slurry; conveying the prepared core layer slurry to a corrugated forming machine, and coating a layer of adhesive glue on the surface of a corrugated peak of a formed corrugated core layer; the paper surface layers are attached to the upper surface and the lower surface of the treated corrugated core layer respectively, a wet paperboard blank is formed, and a multi-section variable-line-pressure squeezing technology is adopted for dewatering and shaping; and the wet paperboard blank is dried. The technical problems that a traditional corrugated board is low in strength and consumables are wasted are solved.

The utility model discloses a convenient to clean's net front centrifugal screen, including base, the base is fixed with the box, the inside rotation of box is equipped with centrifugal cylinder, the upper end opening of box is equipped with the filter box for carrying out the filtration to the paper pulp to the top of box, the filter box is equipped with the funnel shape's feeding opening of penetration, be equipped with the filter mechanism in the feeding opening, the filter mechanism includes the filter screen of detachable setting in the feeding opening, compared with prior art, the utility model has the beneficial effects that: the utility model discloses a convenient to clean's net front centrifugal screen through design detachable filter screen and lifting mechanism cooperation, effectively avoided the paper pulp waste and greatly simplified the cleaning process of centrifugal cylinder and screen cloth, and the design of the crushing knife and the scraper is combined, not only improves the filtration effect of the paper pulp, but also prevents the filter screen from being blocked, the overall optimization paper pulp processing efficiency and quality, reduces the maintenance cost.

The invention discloses ultralow-gram-weight environment-friendly composite kraft paper and a preparation method thereof, and the preparation method comprises the following steps: (1) raw material preparation: in parts by weight, wood pulp accounts for 40%-45% of the raw materials, and kraft paper regenerated pulp accounts for 55%-60% of the raw materials; (2) slurry treatment: adding a chemical additive into the mixed slurry obtained in the step (1), and uniformly stirring to obtain slurry to be put on a net; (3) forming a net part: feeding the to-be-meshed pulp into the net part of a double-net paper machine; (4) squeezing: feeding the wet paper web formed by the net part into a squeezing part, and sequentially squeezing the wet paper web through a first squeezing roller, a second squeezing roller and a third squeezing roller; (5) drying; (6) surface sizing treatment; and (7) coiling and forming to obtain the environment-friendly composite kraft paper with ultralow gram weight. According to the technical scheme provided by the invention, the ratio of the ultra-low gram weight kraft paper pulp is greatly reduced, but the strength still meets the packaging scene use requirements of chemical fertilizers, cement and other industrial woven bags, so that the purposes of environmental protection, cost reduction and efficiency improvement are achieved.

The invention discloses a manufacturing method of composite plastic-substituted flexible packaging paper, and belongs to the technical field of papermaking, and the manufacturing method comprises the following steps: S1, removing surface impurities from needle-leaved wood and broad-leaved wood, cutting the needle-leaved wood and the broad-leaved wood into wood chips, cooking the wood chips, soaking the wood chips in a sulfite solution, and grinding the soaked wood chips by a disc to obtain sulfite paper pulp; s2, adding toughening paper pulp into the sulfite paper pulp, performing pulping treatment to obtain mixed paper pulp, adding a wet strength agent and a fiber dispersing agent into the mixed paper pulp, and performing pulping treatment to obtain papermaking primary pulp; s3, performing papermaking and drying on the papermaking raw pulp to obtain coarse base paper; s4, coating the surface of the coarse base paper with the isolation slurry, drying, and carrying out calendering treatment to obtain the packaging paper; the packaging paper prepared by the invention has higher strength in a wet state.

The invention discloses a comprehensive utilization method of white water. The method comprises the following steps: making paper for daily use and generating first white water; the non-woven fabric is produced, and second white water is generated; filtering the first white water to obtain first clear white water, and filtering the second white water to obtain second clear white water; spraying at least one part of the first clear white water serving as spraying water to a forming net used in non-woven fabric production; at least one part of the second clear white water is used for pulp dispersing treatment or pulp preparing treatment in the production of the household paper, the first white water in the production process of the household paper with the high chemical content is used for spraying in the production process of the non-woven fabric, and the second white water in the production process of the non-woven fabric with the low chemical content is used for pulp dispersing and pulp preparing. And meanwhile, the water consumption in the production process of the white water and the white water can be balanced, so that the clean water consumption in the whole production system is reduced.

The utility model discloses a dental pulp treatment device for oral medicine, which comprises a needle cylinder, a rubber piston is slidably connected to the inner wall of the needle cylinder, a piston rod is fixedly connected to the outer wall of the rubber piston, a pressing block is fixedly connected to one end of the piston rod, and two thumb buckles are fixedly connected to the outer wall of the needle cylinder. A round sleeve is fixedly connected to the outer wall of the needle cylinder, a rotating mechanism is arranged on the outer wall of the round sleeve, and a quantifying mechanism is arranged on the outer wall of the needle cylinder. The round sleeve, the transfer block, the butt joint pipe, the cylinder and the driving rod are arranged, the driving rod enables the needle head to rotate, the needle head is aligned with a root canal in a tooth, and follow-up dosing is facilitated; through the arrangement of the scale groove, the circular ring, the T-shaped block and the rectangular block, the rectangular block is blocked and cannot move after making contact with the circular ring, the purpose of quantitative drug delivery is achieved, and the situation that drugs are too appropriate or pushed insufficiently during pushing is avoided.

An arrangement and a method for controlling a gas flow separated from a suspension of medium consistency pulp. The pulp is treated in a pulp treatment apparatus including a first pump and a second pump, wherein the second pump is a degassing centrifugal pump provided with a degassing system including a degassing conduit in which a degassing valve is arranged for regulating a pressure difference between an inlet of the second pump and the degassing conduit. The degassing system further includes a pressurized degassing vessel working under overpressure and having an inlet and an outlet, wherein the outlet of the vessel is connected to a pressure control valve for maintaining a desired overpressure in the vessel.