122results about How to "Reduce reunion" patented technology

The invention discloses a mollusk attractant as well as a preparation method and application thereof in snail prevention and control, and belongs to the technical field of biopesticides, temperature-responsive microcrystalline cellulose particles are used as a main component of a coating premix, and an attractant base material containing active components, essence, amino acid, molasses and flour is coated, so that the mollusk attractant is obtained. The attractant has temperature responsiveness and can meet the field temperature of snails in spring and autumn high-incidence periods in agricultural production, the essence and the molasses are main components with an inducing function, snails can be better trapped, and the snails are not prone to loss due to the influence of the complex environment in a farmland; the temperature-responsive microcrystalline cellulose particles disclosed by the invention have amphipathy, the hydrophilicity can realize rapid spreading of the attractant in a farmland, and the hydrophobicity can realize that the attractant is not easily washed by water flow and rainwater in the farmland, so that the service life of the attractant is prolonged.

The invention provides flame-retardant tread rubber as well as a preparation method and application thereof. The flame-retardant tread rubber is prepared from the following raw materials in parts by weight: 100 parts of matrix rubber, 24-35 parts of a composite flame retardant, 40-100 parts of filler, 1-4 parts of a silane coupling agent, 2-6 parts of an anti-aging agent, 1-3 parts of sulfur, 1-3 parts of an accelerant, 1-3 parts of stearic acid and 3-5 parts of zinc oxide, the composite flame retardant comprises a halogen flame retardant and an inorganic flame retardant, the inorganic flame retardant comprises an inorganic coating flame retardant, and the inorganic coating flame retardant comprises an antimony trioxide core and a molybdenum disulfide coating layer coating the surface of the antimony trioxide core. In the flame-retardant tread rubber disclosed by the invention, a molybdenum disulfide coating layer in the inorganic coating flame retardant can improve the stability of antimony trioxide at a high temperature, and can enhance the interfacial compatibility with a non-polar rubber matrix at the same time, and the synergistic reaction with the halogen flame retardant further improves the flame-retardant effect; therefore, the flame retardancy of the rubber is improved, and excellent mechanical properties are kept at the same time.

The utility model discloses a modification device for producing inorganic non-metal modified powder with good dispersity. The modification device comprises a semi-finished product bin (1), a first spiral reamer (2), an ion fan (3), a medicament barrel (4), a medicament spraying opening (5), a three-roller modification main machine (6), a cyclone separator (7), a pulse cloth bag collector (8), an induced draft fan (9), a recycled powder bin (10), a second spiral reamer (11), a packaging machine (12) and a material drying room (13). According to the device, the three-roller modification host machine is adopted to finish surface modification, so that the modification effect is good; powder modified by the three-roller modification main machine is less in agglomeration and good in dispersing performance after being separated by the air separator; the ion fan ionizes air to generate a large amount of positive and negative charges, so that charges on the surface of the powder during high-speed friction, collision and shearing can be neutralized, and the static electricity removal treatment of the powder is realized; the device can realize continuous production, and is high in yield and low in energy consumption; and the method conforms to green development, and is energy-saving and environment-friendly.

The invention relates to metal powder and a preparation method and application thereof. The preparation method of the metal powder comprises the following steps that static electricity removing treatment is conducted on a metal powder body; and carrying out atomic layer deposition coating on the metal powder main body after the static electricity removal treatment so as to form an oxide layer coated on the surface of the metal powder main body. According to the preparation method of the metal powder, the flowability of the metal powder can be improved, agglomeration of the metal powder is reduced, the metal powder with good flowability and less agglomeration is prepared, and then the uniformity of metal 3D printing is improved.

This invention discloses a sulfide-reinforced alloy powder for plasma spraying and its preparation method. The method includes: dispersing alloy matrix powder in a water / alcohol mixed solvent for surface activation to obtain activated alloy powder; adding the activated alloy powder to a sulfur-containing coordination reaction solution containing a sulfur-containing coordination precursor, a transition metal salt, and layered sulfide nanosheets for liquid-phase coordination deposition to form a discontinuous deposition layer with a metal-sulfur coordination structure; then performing low-temperature sulfidation heat treatment under a nitrogen atmosphere to transform the discontinuous deposition layer into a transition metal sulfide interface layer, anchoring the layered sulfide nanosheets therein; finally, drying, dispersing, shaping, and sieving to obtain the target alloy powder. The alloy powder obtained by this invention can improve the sulfide retention rate and lubricating phase distribution uniformity after spraying, and improve the coating bonding strength and friction-reducing and wear-resistant properties.

The application relates to a preparation method of a nano WC-Co-based composite powder with inhibitor uniform distribution, and belongs to the technical field of powder preparation. In the application, tungsten oxide and cobalt oxide with large brittleness are used as raw materials, the raw materials are easily broken in a ball milling process, the superfine and nano particle size of a precursor mixed powder containing an inhibitor and the uniform distribution of the raw materials are ensured, the precursor of the inhibitor is dissolved in anhydrous ethanol, a solution is formed, and the solution is mixed with other raw materials, so that the uniform distribution of the component of the inhibitor element in the precursor mixed powder containing the inhibitor is ensured. Polyethylene glycol is added in the ball milling process, the agglomeration of powder particles is reduced, the friction between the powder particles is reduced, and the flowability of the particles is increased. Through the matching of precursor components, the density of the mixed powder of the inhibitor-containing compact and a stage-by-stage heating process, the full reaction of the compact is ensured, the rapid discharge of generated gas is ensured, and through the further ball milling treatment of the prepared powder, the powder is ensured to have the characteristics of pure phase, small WC particle size and uniform component distribution.

This invention discloses a method for preparing and applying an antibacterial composite coating based on quaternized zinc oxide nanoparticles. The preparation method includes: grafting quaternary ammonium salt compounds onto the surface of zinc oxide nanoparticles to prepare synergistic antibacterial nanoparticles; modifying the substrate surface by co-deposition of dopamine and polyethyleneimine to introduce active functional groups; and spraying or dipping the quaternized zinc oxide nanoparticles onto the modified substrate surface to obtain the antibacterial composite coating. This novel antibacterial material preparation scheme can integrate the advantages of zinc oxide nanoparticles and quaternary ammonium salts, while solving key technical problems such as nanoparticle aggregation, weak interfacial bonding, and limited antibacterial efficiency. It is of great significance for promoting the upgrading of hygiene and safety in the fields of medicine, food, and building materials.

This invention provides a low-density flame-retardant thermally conductive foam powder filler, composed of the following components in parts by weight: 200-300 parts of boron nitride (80-100 micrometers); 200-300 parts of hollow glass microspheres (50-70 micrometers); 200-300 parts of aluminum hydroxide (8-10 micrometers); 200-300 parts of aluminum hydroxide (1-2 micrometers); and 2-4 parts of coupling agent. Its advantages are: 1. Low density: By introducing low-density hollow glass microspheres, the overall density of the filler is effectively reduced, meeting lightweight design requirements. 2. High thermal conductivity: The compound boron nitride forms a highly efficient thermal conductivity network. 3. Excellent flame-retardant performance: The halogen-free flame retardant aluminum hydroxide works synergistically with the hollow glass microspheres. The hollow glass microspheres form a glassy barrier at high temperatures, isolating oxygen and heat, achieving excellent flame-retardant effects. 4. Good dispersibility and compatibility: By modifying the powder surface with silane coupling agent, a "molecular bridge" is formed between the inorganic powder and the organic polymer matrix, which significantly reduces agglomeration, lowers the interfacial thermal resistance, and significantly reduces the viscosity of the system.

The invention discloses a carrier supported multi-metal sulfide state nickel-based catalyst as well as a preparation method and application thereof. The catalyst is composed of a porous carrier loaded NixMySz active phase, M is a combination of at least one metal element of Co, Fe, Cu, Zn or Mn, multiple metal components form a synergistic structure in the vulcanization process, and through construction of Ni-S-M bonds, pinning effect generation and electron interaction, controllable adjustment of the sulfide structure is achieved, and the stability of the catalyst is improved. The catalyst is obtained by loading a nickel-second metal precursor on a porous carrier, roasting to form an oxide, vulcanizing in a sulfur-containing atmosphere, and activating. The obtained catalyst has an adjustable Ni: M molar ratio, a sheet-like or petal-like nanostructure and high-density sulfur defects. The catalyst is suitable for decarbonylation-dehydration reaction of bio-based fatty acid or derivatives thereof, and can efficiently convert C10-C20 fatty acid, methyl ester or ethyl ester thereof, and animal and vegetable oil or waste oil containing the components into long-chain olefin at 200-350 DEG C under 0.1-3 MPa.

This invention relates to the field of battery technology, and in particular to a lithium-ion battery anode, its preparation method, and a lithium-ion battery. The invention provides a method for preparing a lithium-ion battery anode, comprising the following steps: stacking a first composite layer and a second composite layer with the surface of an intermediate metal layer in contact with the surface of a lithium metal layer, and then pressing them to obtain a lithium-ion battery anode; wherein the first composite layer comprises a silicon-based anode layer and an intermediate metal layer; and the second composite layer comprises a lithium metal layer and a conductive substrate. The method for preparing the lithium-ion battery anode of this invention solves the problems of volume expansion of silicon anodes, dendrite growth of lithium metal anodes, and poor process safety when simply combining silicon anodes with lithium metal.

The application provides a crosslinked polyethylene insulated cable and a preparation process thereof, and belongs to the technical field of cables, and comprises the following steps: step S1, preparing UiO-66-F4 masterbatch; step S2, preparing hexagonal boron nitride masterbatch and nano-alumina masterbatch; step S3, preparing insulation granules; step S4, performing three-layer co-extrusion on a copper core conductor to form a conductor shielding layer / insulation layer / insulation shielding layer, and then performing CV crosslinking, cooling, degassing, and then coating a metal braided shielding layer and an outer sheath to obtain the crosslinked polyethylene insulated cable. The application can improve the DC breakdown strength and long-term insulation stability of the crosslinked polyethylene insulated cable.

This invention discloses a heat- and impact-resistant protective conduit for MPP cables and its preparation method, relating to the field of polymer materials technology. The components, by weight, include: 20-22 parts of a toughening dispersion made from anhydrous ethanol and terminally epoxy-terminated hyperbranched polysiloxane; 33-35 parts of a boron-nitrogen co-doped carbon dot made from citric acid, boric acid, and urea, first compounded with phytic acid and piperazine, then compounded with modified zirconium phosphate prepared by hexadecyltrimethylammonium bromide intercalation, and then modified with silane coupling agent KH-560 to form a flame retardant synergist; 12-14 parts of polyolefin elastomer; 2-2.5 parts of magnesium aluminum hydrotalcite; 0.2-0.24 parts of antioxidant; 0.2-0.3 parts of calcium stearate; 0.2-0.3 parts of polyethylene wax; and 100-120 parts of polypropylene. The introduction of the flame retardant synergist and other raw materials in this invention effectively improves flame retardancy, aging resistance, impact resistance, low-temperature resistance, and heat resistance.

This invention discloses a method for preparing high-entropy ceramic matrix composites using a reactive infiltration process, belonging to the technical field of ceramic matrix composites. The steps are as follows: at least four single-component carbides are ball-milled and mixed with a carbon source, then dispersed in a dispersion liquid to obtain a slurry; continuous fibers are woven into a preform, and an interface layer and a matrix layer are deposited to obtain a semi-dense composite material; the slurry is introduced through vacuum or pressure impregnation; and a high-entropy carbide matrix is ​​generated in situ and densified by reactive infiltration after embedding with a transition metal and its alloy. This invention solves the problems of long process cycles, high porosity, high cost, and insufficient introduction of high-entropy ceramics in existing processes, achieving rapid densification and improving the material's high-temperature stability, oxidation resistance, and ablation resistance. It is suitable for the large-scale production of thermal protection materials for hypersonic vehicles.

The utility model discloses a double-helix stirring device for uniformly dispersing concrete conductive components, which comprises a stirring barrel, a protective cover is movably mounted at the top of the stirring barrel, a protective shell is fixedly mounted at the top of the protective cover, a stirring component is arranged in the protective shell, and the stirring component is arranged in the protective shell. And scrapers are symmetrically and fixedly mounted on the two sides of the stirring assembly. According to the double-helix stirring device for uniformly dispersing the conductive components of the concrete, through the arrangement of the stirring assembly, the packing auger and the scraping plate, a stirring structure in the scheme adopts coaxial bidirectional stirring, so that stirring is more uniform, the stirring device can drive the packing auger and the scraping plate to rotate, the scraping plate can clean the conductive components on the inner wall of the stirring barrel, and the stirring efficiency is improved. A large amount of conductive components on the inner wall of the stirring barrel body are prevented from influencing use, the auger can be used for conveying and feeding the conductive components, the interior of the discharging pipe can be effectively prevented from being blocked, and the use effect of the double-helix stirring device is improved.

The invention relates to a magnesium-based hydrogen storage material and a preparation method thereof, and belongs to the technical field of hydrogen storage alloy materials and preparation thereof. The hydrogen storage material is an Mg-5Ni alloy with Sm powder uniformly distributed on the surface layer and an amorphous / nanocrystalline structure in the interior. The Sm powder is wrapped by the surface layer of the Mg-5Ni alloy to form composite powder of a core-shell structure; the hydrogen storage material is prepared from Mg-5Ni alloy powder and Sm powder as raw materials, and the raw materials are mixed and then subjected to dry ball milling. The hydrogen absorption and desorption kinetics of the existing magnesium-based hydrogen storage material can be effectively improved, the hydrogen desorption activation energy of the magnesium-based hydrogen storage material is reduced, and the problem that a solid additive is difficult to uniformly distribute on the surface is solved.

This invention discloses a precipitated silica dispersant for rubber, its preparation method, and its application, relating to the field of rubber additives. The precipitated silica dispersant for rubber is made from raw materials comprising the following proportions: modified vegetable oil and hydroxide, wherein the molar ratio of the modified vegetable oil to the hydroxide is 1:(0.3-0.6), and the modified vegetable oil is copolymerized from vegetable oil monomers, benzene ring unsaturated monomers, and cashew nut phenol. This application provides an environmentally friendly and safe precipitated silica dispersant that can significantly improve the dispersibility of precipitated silica in rubber compounds while simultaneously improving the mechanical properties of the rubber compounds.

This utility model discloses an immersion plating solution supply device, comprising: a transfer container for temporarily storing the immersion plating solution; a stirring motor and a liquid inlet located at the top of the transfer container; a stirring shaft located in the transfer container and driven by the stirring motor; a stirring rod located in the transfer container and driven by the stirring shaft; an ultrasonic transducer located at the bottom of the transfer container; a supply pipe externally connected to the bottom of the side wall of the transfer container for conveying the immersion plating solution to the immersion plating treatment container; and a supply valve and a supply pump located on the supply pipe. This immersion plating solution supply device can pre-stir and ultrasonically treat the immersion plating solution before adding it from the packaging container to the immersion plating treatment container, thereby eliminating or significantly reducing agglomeration and sedimentation of the immersion plating solution. Furthermore, when performing batch immersion plating treatment on aluminum tube substrates, it can avoid or significantly reduce adverse consequences caused by fluctuations in the quality of the immersion plating solution, ultimately improving product yield and reducing production costs.

This invention provides a method for controlling the dispersion behavior of MgO to reduce magnesium residue in the MHP precipitation process. The method includes preparing a precipitant slurry by mixing an MgO-containing precipitant, a silicate-containing dispersant, and water; then mixing the precipitant slurry with a nickel-cobalt solution to carry out a precipitation reaction; and finally, after solid-liquid separation, washing, and drying, obtaining a nickel-cobalt hydroxide MHP product with a magnesium residue of ≤1%. This invention uses a specific silicate dispersant to effectively reduce the agglomeration of MgO particles. After forming the precipitant slurry, it maintains the alkali-adjusting precipitation effect of MgO as the main precipitant while effectively reducing the magnesium residue in MHP and controlling the silicon impurity content. This method helps solve the technical problems of high magnesium residue and the easy introduction of excessive impurities by inorganic dispersants in existing MHP precipitation processes using MgO, effectively improving the purity of the MHP product.

The application discloses a high water pressure resistant, low temperature flexible waterproof and moisture permeable composite fabric and a preparation method thereof. The modified nano silicon dioxide has a nano scale effect, can efficiently shield ultraviolet radiation, and has chemical stability, endowing the material with inherent ability to resist external salt corrosion, and builds a double barrier of resistance to ultraviolet and salt corrosion in the fiber. The micro-nano surface topology of the pine needle shell layer increases the effective exposed area of the modified nano silicon dioxide, optimizes the functional interface, and the axial hollow cavity forms a stress buffer channel in the fiber, reduces the damage of external mechanical stress to the modified nano silicon dioxide dispersion structure to maintain uniform distribution. The high efficiency shielding and chemical resistance of the modified nano silicon dioxide resist ultraviolet penetration and salt erosion, and the micro-nano structure and hollow cavity of the pine needle shell layer maintain low temperature flexibility, and realize the balance of high water pressure resistance, waterproof and moisture permeability and resistance to ultraviolet and salt corrosion.

This invention relates to the field of dispersant technology, and discloses a dispersant composition, its preparation method, and its application. The composition comprises the following components in parts by weight: 100 parts linear paraffin, 10-30 parts water, 20-40 parts dispersing material, 8-10 parts emulsifier, and 3-5 parts solubilizer, wherein the dispersing material is selected from bicarbonates and / or carbonates. The dispersant composition provided by this invention is non-toxic and biodegradable. When used in polyacrylamide granulation, it results in polyacrylamide products with high hydrolytic uniformity and rapid hydrophilic solubility.

The application discloses a W and Mo modified Co-based catalyst and a preparation method and application thereof, and belongs to the technical field of hydrogen evolution materials. 1‑x -W x -Mo y -B, wherein x is 0.05-0.5, and y is 0.025-0.2.The W and Mo transition metal doping can effectively improve the surface area of the catalyst, avoid excessive aggregation of the catalyst particles, and make as many catalytic active sites of the catalyst as possible exposed to a reaction solution, so that the obtained quaternary catalyst has high catalytic activity and good cycle stability.

The utility model discloses a kind of diamond micro-powder particle multistage classification devices, specifically relates to diamond micro-powder classification technical field, including shell, shell bottom is fixedly connected with support, multiple collecting boxes are slidably connected in support inner side, shell top is fixedly connected with support frame, two fans are installed in shell side, fan output end is fixedly connected with air pipe, shell inner side is provided with classification collection mechanism;Classification collection mechanism includes concentrated frame one, concentrated frame one side is fixedly connected with concentrated frame two, concentrated frame two bottom is fixedly connected with shell inner side.The utility model utilizes multiple dispersion plate to carry out stratification dispersion to airflow, reduce the reunion and local accumulation of diamond micro-powder particle, simultaneously pass through air outlet pipe and filter plate to filter airflow to prevent particle exfiltration, and combine with the rotation friction of grinding ball and grinding seat and the splashing of vibration frame, optimize particle distribution, reduce energy consumption, improve classification accuracy, environmental protection.

The present application relates to the technical field of medicine and chemical industry, in particular to a kind of alginate / nano lanthanum hydroxide composite microspheres and its preparation method and application.The composite microspheres use sodium alginate as organic matrix material, and nano lanthanum hydroxide as inorganic filling phase, which are prepared by electrospray technology, and can realize the uniform dispersion and wrapping of nano lanthanum hydroxide in alginate microspheres.The size of the composite microspheres can be adjusted as needed between 235.5 μm and 748.4 μm, and the mass ratio of alginate to nano lanthanum hydroxide can be adjusted as needed within 1: (0.5-1.5).The composite microspheres of the present application have a phosphorus binding capacity of 41.0 mg / g-90.0 mg / g in a gastric acid environment with pH=2, and excellent phosphorus binding ability, which can be used as an oral phosphorus binding agent for the treatment of hyperphosphatemia, providing a new technical solution for clinical intervention of hyperphosphatemia.

The invention relates to a stirring casting preparation method suitable for a superfine SiCp reinforced aluminum-based composite material. The problems that in a traditional technology, wettability of SiCp and aluminum melt is poor, agglomeration is prone to occurring, an Al4C3 brittle phase is prone to occurring, and the melt is prone to being polluted by impurities and high in porosity are solved. The preparation method comprises the following steps: performing in-situ growth of graphene on the surface of SiCp through pulse laser-methane micro-explosion to form a composite reinforced phase; carrying out aluminum alloy fractional smelting and step-by-step stirring to obtain a composite melt; an external coil-iron core assembly is adopted to carry out pulse magnetic oscillation on the melt, and mechanical stirring and argon degassing are synchronously matched; and finally casting and molding. According to the method, generation of Al4C3 can be avoided, uniform dispersion of SiCp is achieved, the density of the obtained composite material is larger than or equal to 99.2%, the 0.2% yield strength is larger than or equal to 220 MPa, the heat conductivity retention rate is larger than or equal to 99%, the increment of the iron content of the melt is smaller than or equal to 50 ppm, ton-level mass production can be achieved based on conventional equipment, and the method is suitable for industrial preparation of the high-performance aluminum-based composite material in the fields of aerospace and automobiles.

This invention provides a method for preparing lithium iron phosphate from hydroxyferric phosphate and lithium iron phosphate electrode material. Ferrous sulfate is purified to form a ferrous sulfate solution. Hydrogen peroxide, phosphoric acid, ammonium dihydrogen phosphate solution, and ammonia are added to the ferrous sulfate solution to form a mixed slurry. The mixed slurry is kept at room temperature for a period of time, then washed with water and filtered to form hydroxyferric phosphate precursors with different iron-phosphorus ratios. These precursors are then flash-dried and sintered at high temperature to obtain hydroxyferric phosphate precursors with different iron-phosphorus ratios and specific surface areas. The hydroxyferric phosphate precursors are pulverized and mixed to obtain the finished hydroxyferric phosphate product. High-iron-phosphorus ratio hydroxyferric phosphate and low-iron-phosphorus ratio hydroxyferric phosphate are mixed in a certain proportion and then formulated with lithium phosphate, lithium iron phosphate, and electrode material in a specific ratio, with the addition of a carbon source and additives to form a mixture. The mixture is then subjected to ball milling, sand milling, spray drying, sintering, pulverizing, sieving, batching, and packaging processes to obtain the finished lithium iron phosphate product.

A modification device for producing modified silica powder comprises a semi-finished product bin (1), a first spiral reamer (2), a high-speed mixer (3), a medicament barrel (4), a cooling cylinder (5), an ultrasonic vibration screening machine (6), a Roots blower (7), a cloth bag collector (8), a second spiral reamer (9), a packaging machine (10), a medicament sprayer (11), a stirring paddle (12), a base (13), an ultrasonic generator (14), a transducer (15), a motor (16) and a screen (17). According to the device, the ultrasonic vibration screening machine is arranged, ultrasonic vibration is adopted, the screening efficiency is high, net blocking is avoided, and the screening precision is high; the ultrafine modified silica powder is less in agglomeration and good in dispersing performance.

The present application relates to the technical field of industrial water treatment, and in particular to a branched polycarboxylate, a high-temperature-resistant low-phosphorus scale-inhibiting dispersant for grey water and a preparation method thereof.The high-temperature-resistant low-phosphorus scale-inhibiting dispersant for grey water comprises the following raw materials in parts by weight: 6-10 parts of disodium ethylenediaminetetraacetate, 18-22 parts of hydrolyzed polymaleic anhydride, 0.3-0.8 parts of sodium hexametaphosphate, 15-20 parts of sodium polyacrylate, 1.5-2.5 parts of aminotrimethylene phosphonic acid mother liquor, 30-38 parts of branched polycarboxylate and 15-20 parts of deionized water.The obtained scale-inhibiting dispersant can effectively inhibit carbonate scale and sulfate scale, and has good high-temperature stability.

The utility model relates to titanium dioxide preparation device technical field especially relates to a device and preparation nanometer titanium dioxide of preparation titanogel. Include: reaction container, stirring mechanism, vortex disperser, set up in reaction container bottom, including turbine, perforated screen and umbrella -like diffusion head, for dispersing into liquid alkali and even injection titanyl sulfate solution in fine flow, interface, with vortex disperser connects, for conveying liquid alkali, through the vortex disperser of reaction container bottom realizes the even injection of liquid alkali, avoids local concentration too high, improves mixing efficiency, reduces particle agglomeration, ensures that titanogel particle size distribution is even, and further ensures that nanometer titanium dioxide particle size distribution is even, the core innovation of the utility model lies in the traditional top drop -wise mixing mode is innovated as bottom vortex injection mode, and the mixing dynamics characteristics of reaction liquid are fundamentally changed.

The utility model relates to a sewage treatment equipment for environmental protection engineering belongs to sewage treatment technical field, in order to solve the problem that the bubble diameter generated by traditional aeration is usually larger, the rising speed is faster, the oxygen utilization rate is lower, and cannot form the full mixing with sewage, the utility model discloses sewage treatment tank and the oxygen cavity of opening in sewage treatment tank inside, sewage treatment tank both sides are installed with pump body, a plurality of jet elements are fixedly installed in the oxygen cavity, and the pump body is communicated with a plurality of jet elements through the pipeline, and the one end of jet element is installed with suction shell, and the one side of suction shell is communicated with the water outlet pipe, and the rotating part is installed in the water outlet pipe, the utility model discloses through the treatment of jet breaking and rotary shearing, the bubble diameter is significantly reduced, and the specific surface area is greatly increased, and the rising path of bubble is changed by swing plate, prolongs its residence time in sewage, makes oxygen have more sufficient time to dissolve, effectively solves the problem that the oxygen utilization rate of traditional aeration is low.

The present application relates to the technical field of filter material preparation, and particularly relates to a wear-resistant blended gradient needle-punched filter material and a preparation method, which comprises the following steps: S1, preparing a first mixture and a second mixture; S2, respectively laying the first mixture and the second mixture to obtain an inner layer and an outer layer; S3, hooking and bonding the outer layer and the inner layer by pre-punching to obtain a base material; S4, vacuum impregnating the base material in an impregnation liquid for h; S5, treating the base material in step S4 at 80-120 DEG C for 15-30 min; S6, applying a finishing agent to the surface of the base material treated in step S5 by padding; S7, treating the base material treated in step S6 at 150-200 DEG C for 3-5 min; and S8, laying a PTFE microporous membrane on the base material treated in step S7. The filter material prepared by the present application has high transverse breaking strength and longitudinal breaking strength, and excellent filtering efficiency.