34 results about "Pulp treatment" patented technology

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 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 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 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 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 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 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 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.

A base plate for a pulp processing unit includes a plate having an upper axial surface, a lower axial surface, and a plurality of openings extending through the plate from the upper axial surface to the lower axial surface. Each of the plurality of openings has a shape, a size, and an angle. The shape is a cross-sectional shape, a size equal to a maximum cross-sectional dimension, and the angle is an angle formed between a center line of each of the plurality of openings and an axial line parallel to a center axis of the base plate. The shape, size, orientation of shape, angle, or combination thereof of the plurality of openings varies depending on the position of the openings on the base plate. The invention further discloses a paper pulp processing unit comprising the bottom plate.

The utility model relates to a degradable composite paper board blank suitable for carton processing, which comprises a base layer straw paperboard, a bamboo fiber layer is distributed on the base layer straw paperboard, a polylactic acid film layer is distributed on the bamboo fiber layer, a starch-based waterproof layer is coated on the polylactic acid film layer, and the starch-based waterproof layer is coated on the starch-based waterproof layer. Adhesive layers are distributed among the base layer straw paperboard, the bamboo fiber layer and the polylactic acid film layer to form a composite laminate structure, the base layer straw paperboard is of a honeycomb composite structure, and the bamboo fiber layer is a net-shaped laminate formed by weaving a plurality of bamboo fiber strips in a crossed mode. Therefore, the configuration of almost full degradation can be realized, after the whole paper box is degraded, the effective degradation within 180 days can be met, and the pulping treatment requirement after the finished paper box is discarded is met. The whole material is mainly made of plant base materials, and the environment-friendly requirement in the manufacturing period is met. And after being processed into the paper box, the paper box can meet the daily supporting and using requirements of the paper box.

The application discloses a chemical precipitation method using magnesium oxide and a metal hydroxide product, and the chemical precipitation method comprises the following steps: S1, obtaining a pre-reaction solution capable of being used for a precipitation reaction, and obtaining a pulp solution containing ions of a target metal in the pre-reaction solution; S2, mixing magnesium oxide powder and the pulp solution, and obtaining a first slurry through a pulp treatment; and S3, putting the first slurry into a reactor to perform a precipitation reaction, and generating a precipitated slurry containing a metal hydroxide of the target metal. In the magnesium oxide powder, a first part of the magnesium oxide powder has a higher average activity than that of the whole magnesium oxide powder. The method is used to solve the problem of serious activity attenuation of the magnesium oxide slurry, improve the precipitation efficiency of the target metal in the precipitation reaction, increase the content of the target metal in the metal hydroxide product, and reduce the single consumption of the magnesium oxide and the content of magnesium impurities in the product.

The present application relates to the technical field of lithium residue treatment, and particularly relates to a comprehensive recycling method of lithium residue. The method comprises the following steps: performing pulp treatment on the lithium residue to obtain a suspension; performing grading treatment on the suspension to obtain coarse-grained lithium residue and fine-grained lithium residue; performing lithium flotation treatment on the coarse-grained lithium residue to obtain lithium concentrate and primary flotation tailings; performing grinding treatment on the primary flotation tailings to obtain grinding material; mixing the grinding material and the fine-grained lithium residue, and then performing weak magnetic separation treatment to obtain iron concentrate and tailings after weak magnetic separation; performing strong magnetic separation treatment on the tailings after weak magnetic separation to obtain weak magnetic material and tailings after strong magnetic separation; performing gravity separation treatment on the weak magnetic material to obtain tantalum-niobium concentrate and iron-rich material; and performing sulfur flotation treatment on the tailings after strong magnetic separation to obtain silicon-aluminum powder and gypsum. The present application provides a comprehensive recycling method of lithium residue, which recycles lithium concentrate and tantalum-niobium under grading treatment, and the products have high grade and recovery rate, and efficient comprehensive recycling of lithium residue is realized.

The utility model relates to the technical field of pulping treatment, in particular to a slag removal system of a paper machine. Comprising a water tank communicated with five sections of slag slurry pipes, a dilution assembly is arranged at the lower end in the water tank and communicated with a clear filtrate pipe, a high-pressure pump is installed on the clear filtrate pipe, an outlet of the water tank is communicated with an outlet pipe, the outlet pipe is communicated with an inlet of a slag separator, the clear filtrate pipe is communicated with an inlet pipe, and the inlet pipe is communicated with a flushing pipeline of the slag separator. A pulp outlet pipe of the slag separator is communicated with the pulp flowing box, and a slag outlet pipe of the slag separator is communicated with the jumping screen. According to the system, the residue pulp of the fifth residue removal section is placed in the water tank to be stored, the residue remover is additionally arranged to remove residues of the residue pulp in the water tank, accepted pulp discharged by the residue remover enters the papermaking system, and pulp residues discharged by the residue remover are further subjected to liquid removal through the jumping screen, so that the pulp residues are conveniently analyzed, and the working state of the impurity removal section of the pulping system is judged.

The invention discloses a paper pulp feeding device for paper pulp molding production, and relates to the technical field of equipment for paper pulp molding production and processing. The pulping device comprises a feeding block, and a pulping mechanism is arranged in the feeding block. Paper pulp fibers are further crushed through the pulp grinding mechanism, roughly-machined paper pulp is conveyed into the feeding block through a first flange, a feeding pipe, a connecting pipe and air pressure, an output shaft and a driven rod are driven by a driving motor to rotate, so that the driven block rotates along with the driven rod, and when the driven block rotates, the driven block is driven to rotate. A driven block drives a movable cutter to be periodically attached to a fixed cutter, through the arrangement of the mechanism, the problem that paper pulp is deposited in the device is effectively avoided, the effect of stirring the paper pulp can be achieved, the stability of the device during use is improved, the maintenance frequency is reduced, paper pulp fibers can be cut up when the device feeds the paper pulp, and the paper pulp is more stable. The quality of paper pulp molding is improved, and the paper pulp processing steps are optimized.

This invention relates to a papermaking process for cultural paper, and relates to the technical field of papermaking. The process includes initial pulp preparation, pulp treatment, papermaking, and post-treatment steps. By using softwood pulp and poplar mechanical pulp to establish a fiber skeleton, and using chitosan grafted with acrylamide-maleic anhydride copolymer to enhance fiber bonding, a stable wet-end chemical environment is established to ensure efficient retention of fillers. This application achieves high ash content and high bulk while improving paper strength, resulting in cultural paper with good surface integrity and stable physical properties.

The utility model discloses a corrugated board processing waste treatment device which comprises a bottom plate, fixing frames are fixedly connected to the two sides of the top of the bottom plate, and sleeves are rotationally connected to the interiors of the fixing frames. The fixing frames are arranged on the two sides of the top of the bottom plate, the sleeves are rotationally connected into the fixing frames, the first bevel gears are sleeved with the fixing frames, and the fixing frames are meshed with the second bevel gears, so that threaded rods in threaded connection with the sleeves can drive the treatment barrel to achieve height adjustment, floating waste can be effectively pressed into water through the movable frame and the pressing plate frame, and the soaking effect is improved; and through cooperation of a cylinder, a cover plate, a cutting rod and a first motor, the soaked waste can be fully cut and smashed into paper pulp, the bottom of the treatment cylinder communicates with a discharging valve so that the paper pulp can be conveniently discharged and collected, the device is good in treatment effect, the space occupied by the waste can be effectively reduced, efficient treatment of the corrugated board machining waste can be conveniently achieved, and the practicability is high. The device has the advantages of convenience in use and good treatment effect.

The invention belongs to the technical field of perovskite solar cells, and particularly relates to a preparation method and application of alpha-phase FAPbI3 crystallis.The preparation method comprises the steps that a divalent lead source, formamidine hydriodate, hydriodic acid and hypophosphorous acid react at the room temperature in a water phase environment, and a delta-phase FAPbI3 crude product is obtained after filtering; then, the crude product is sequentially subjected to washing, anti-solvent extraction and pulping treatment, and a delta-phase FAPbI3 purified product is obtained; and finally, the delta-phase FAPbI3 purified product is subjected to annealing treatment, so that the delta phase is converted into an alpha phase, and the high-purity alpha-phase FAPbI3 microcrystal is obtained. The invention provides a preparation scheme of the alpha-phase FAPbI3 microcrystal which is simple in process, low in cost and easy for large-scale production, and the alpha-phase FAPbI3 microcrystal has a wide application prospect in photoelectric devices such as solar cells and the like.

The utility model relates to the technical field of iron phosphate production, in particular to a treatment system for an iron phosphate waste filter cake. The utility model discloses a treatment system for an iron phosphate waste filter cake. The treatment system comprises a first pulping tank for pulping the iron phosphate waste filter cake; the first pulping tank is connected to a first filter; the first filter is connected to a demagnetizing reactor; the demagnetizing reactor is connected to the second pulping tank; the second pulping tank is connected to a synthesis kettle, and the synthesis kettle is connected to a chemical kettle. According to the treatment system, the problem that if a large number of waste filter cakes are directly scrapped, resources are wasted is solved.

The invention relates to the technical field of dental pulp treatment, and discloses a dental pulp regeneration postoperative curative effect dynamic evaluation system and method, and the system comprises a data standardization module, a correlation analysis module, a map construction module, a mode recognition module, a trend research and judgment module and a report generation module. The method comprises the following steps: performing feature scale normalization on multi-modal curative effect monitoring data of a patient to obtain standardized time series data, constructing an association relationship matrix through phase synchronization analysis, and constructing a dynamic data association map by taking a time point as a node and association strength as an edge weight; performing change pattern recognition on the topological clustering structure in the dynamic data association map to obtain biological pattern evolution characteristics; performing prognosis trend study and judgment on the dental pulp regeneration process of the patient based on biological model evolution characteristics to obtain a comprehensive curative effect evaluation conclusion; according to the comprehensive curative effect evaluation conclusion, generating a dental pulp regeneration curative effect evaluation report; the efficiency of dental pulp regeneration curative effect evaluation can be improved.

The invention relates to a manufacturing method of an environment-friendly antibacterial paper pet product, which comprises the following steps: by taking recycled corrugated paper fiber as a main raw material, sequentially carrying out crushing, impurity removal and repulping treatment on recycled corrugated paper to prepare paper pulp, and adding a waterproof additive; carrying out double-stage antibacterial treatment on the paper pulp to form a stable chitosan-silver ion complex; carrying out suction filtration on the paper pulp subjected to the double-stage antibacterial treatment through a paper-plastic molding machine to form a wet blank, naturally pre-drying the wet blank, and then carrying out hot-pressing shaping treatment; and trimming and sterilizing the green body subjected to hot-press shaping to obtain a finished product. According to the invention, the antibacterial agent is uniformly distributed on the surface and inside the paper pulp fiber through the two-stage antibacterial treatment, so that the problems of non-uniform antibacterial property and effect attenuation caused by single antibacterial treatment are avoided; the prepared product not only solves the problem that the product is easy to damage, but also improves the pain point that the pet product is easy to breed bacteria and generate peculiar smell through the antibacterial and waterproof design.

The invention relates to the technical field of decorative base paper preparation, and discloses a decorative base paper preparation method, which comprises: S1, raw material pretreatment: mixing softwood pulp and hardwood pulp according to a specific mass ratio, adding water to prepare a mixed slurry with a preset concentration, defibering through a defibering machine, and carrying out thermal insulation stirring for a certain time at a suitable temperature; s2, pulping treatment: feeding the pretreated mixed pulp into a double-disc pulping machine for pulping, and controlling the pulping degree and the wet weight range to be specific; according to the preparation method of the decorative base paper, the decorative base paper has higher whiteness and opaqueness, and the phenomenon of bottom penetration during printing can be avoided; the transverse ring crush index and the longitudinal fracture length meet the specific strength requirements, and the damage-resistant requirements in subsequent processing and long-term use can be met; the water absorption height is in a relatively low range, so that the adhesiveness of printing ink and the adhesion stability of a coating film can be ensured, and the water-absorbing material is suitable for various application scenes such as furniture veneering and floor decoration.

The invention discloses special polyacrylamide with stable flocculation speed for papermaking in an air flotation process. The invention discloses a water-based adhesive which is prepared from the following components in parts by weight: 55 parts of acrylamide, 20 to 30 parts of dimethyl diallyl ammonium chloride, 12 to 15 parts of 2-acrylamido-2-methylpropanesulfonic acid, 430 to 450 parts of deionized water, 0.02 part of mercaptoethanol, 0.03 part of EDTA-2Na (Ethylene Diamine Tetraacetic Acid), 0.02 part of initiator VA-044, 0.04 part of tert-butyl hydroperoxide and 0.03 part of ammonium ferrous sulfate. The invention also provides a preparation method of the special polyacrylamide for papermaking. The polyacrylamide provided by the invention can realize stable flocculation speed and constant foam strength in the air flotation process, and has strong water quality change resistance, so that the efficiency and stability of the air flotation process in papermaking wastewater treatment and paper pulp treatment are remarkably improved, and the sustainable development of the papermaking industry is ensured.

The utility model discloses a kitchen waste grinding and pulping treatment device, and relates to the technical field of kitchen waste recycling, the kitchen waste grinding and pulping treatment device comprises a supporting mechanism, a pulping mechanism is rotatably arranged in the supporting mechanism, and a drainage mechanism is arranged at the lower end of the supporting mechanism. In order to solve the problems of more moisture in kitchen waste, higher treatment difficulty and higher cost caused by the fact that the kitchen waste is difficult to treat, the water draining mechanism is arranged, a water draining opening is formed in the lower end, redundant moisture can naturally flow out through the water draining opening, a slurry discharging opening is formed in the upper end, solid waste can be conveyed upwards through rotation of a spiral piece, and the waste can be discharged through the slurry discharging opening. Through the arrangement of the side opening in the spiral part and the arrangement of the filter screen at one end of the water filtering opening, the side opening effectively realizes the water diversion treatment of the kitchen waste, the subsequent water treatment cost is saved, the arrangement of the filter screen realizes the filtration treatment, and the rotation of the spiral part can clean the filter screen in real time to guarantee the effect.

The utility model discloses a kind of yarn tube paper quick pulp equipment, including guide component, the guide component is used to guide yarn tube paper;Crushing component, the crushing component is set to the bottom surface of the guide component, the crushing component is used to crush yarn tube paper and discharge;And pulp component, the pulp component is set to the bottom surface of the crushing component, the pulp component is used to carry out pulp treatment to the yarn tube paper after crushing, the guide component includes guide cover, arc slot is set in the top surface of the guide cover, the utility model can not only carry out pulp treatment to yarn tube paper, but also can be screened after crushing, to ensure that the yarn tube paper of pulp is substantially consistent, in turn, pulp uneven problem caused by not fully crushing can be avoided, so that production efficiency can be improved.

The invention discloses a dehydration process of formed paper pulp and paper for daily use, and the process comprises the following steps: sequentially pulping and grinding paper pulp, controlling the pulping degree to be 25-35 degrees SR, the pulping specific pressure to be 10-20 N / mm, and the grinding linear pressure to be 15-25 N / mm; forming a wet paper web by adopting a 60-100-mesh forming net; and carrying out mechanical dehydration under the conditions that the dehydration angle is 15-30 degrees and the pressure of an extrusion roller is 30-50 kN / m. Therefore, the fiber structure is protected while efficient dehydration is achieved, the pulp concentration is increased by 3%-4%, pulp consumption and energy consumption are reduced, and the obtained paper for daily use has high bulkiness, high softness and good strength and is suitable for production of medium-and-high-end paper for daily use.

The invention discloses a nitrogen and phosphorus recovery method for acid-insoluble substances in nitrophosphate fertilizer production, which comprises the following steps: (1) conveying the acid-insoluble substances generated in the nitrophosphate fertilizer production process to a repulping washing tank of a desiliconization system, adding washing water for repulping treatment, controlling the repulping temperature at 50-60 DEG C and the retention time at 30-60 minutes; (2) conveying the mixed liquid subjected to re-pulping treatment in the step (1) to a re-pulping filter press through a pump for filtering, and separating to obtain solid-phase residues and filtrate containing nitrogen and phosphorus; (3) introducing the filtrate obtained in the step (2) into a phosphorus-containing sewage buffer tank, and then refluxing to a neutralization system and / or a main line system for producing the nitrophosphate fertilizer; and (4) transferring the solid-phase residue obtained in the step (2) to a silicon-magnesium-calcium workshop, and stacking the solid-phase residue as a raw material of the soil conditioner. The method provided by the invention can avoid the condition of heavy acid mist caused by accumulation of acid-insoluble substances in the prior art, and can further recover soluble nitrogen (N) and phosphorus (P2O5) in the acid-insoluble substances.

The invention aims to provide a dental pulp treatment device, and relates to the technical field of medical instruments, a pressurizing head comprises a plurality of pressurizing rods with different diameters, the plurality of pressurizing rods are sequentially sleeved together in a sliding manner from inside to outside, and the diameters of the plurality of pressurizing rods are sequentially increased from inside to outside; a plurality of pressurizing rods form a retractable structure, and the pressurizing area can be changed along with the increase of pressure, so that the pressurizing effect is improved, a vertical pressurizer with a larger diameter is prevented from being switched back and forth, and the operation time is shortened; the power supply and the controller are arranged in the grip, the pressurizing rod can be heated through the contact electrode, hot gutta-percha can be fused, and the situation that a heat carrying device and a vertical pressurizing device are switched back and forth is avoided.

The utility model relates to tailing pulp treatment reagent cooperation equipment technical field, concretely is a kind of for cyanide-containing tailing pulp treatment reagent cooperation filling device, including reaction tank, rotatingly installed rotating rod in the reaction tank, the top of the reaction tank is fixedly connected with multiple medicine inlet pipes, valve is fixedly installed on the medicine inlet pipe, adjusting mechanism is arranged between the medicine inlet pipe, valve and rotating rod. The utility model discloses through reaction tank, rotating rod, medicine inlet pipe, valve and adjusting mechanism, when the different medicine inlet pipe valve opens, the aperture of medicine spraying head can be adjusted in different size, so that the aperture of medicine spraying head and reagent characteristic dynamic matching are matched, ensure that different reagent enters reaction system with optimum form, avoid the local reaction insufficient caused by the inhomogeneous filling.