61results about How to "Suitable for large-scale applications" patented technology

The invention belongs to the technical field of pressure-sensitive adhesives, and discloses a high-weather-resistance pressure-sensitive adhesive and a preparation method thereof. The pressure-sensitive adhesive is prepared from the following raw materials in parts by weight: 30 to 40 parts of a soft monomer, 5 to 10 parts of a hard monomer, 1 to 3 parts of a functional monomer, 50 to 80 parts of a solvent, 1 to 5 parts of alkylene polyhedral oligomeric silsesquioxane, 1 to 3 parts of pentalyn, 0.5 to 1 part of an initiator and 0.5 to 0.8 part of a curing agent. The hard monomer is a mixture of methyl methacrylate and isobornyl acrylate, and the mass ratio of methyl methacrylate to isobornyl acrylate is (3-5): 1. The components interact with one another, the product structure is stable, the viscosity and peel strength of the pressure-sensitive adhesive are greatly improved, and the pressure-sensitive adhesive has good weather resistance, can be applied to high-temperature and high-humidity scenes for a long time, cannot be aged and decomposed due to simple weather changes and harsh working environments, is good in uniformity and stability, and can be widely applied to high-temperature and high-humidity scenes. The method is suitable for large-scale application.

The invention discloses a high-strength wood nanocellulose membrane and a preparation method thereof, and belongs to the technical field of nanocellulose membranes. The preparation method provided by the invention comprises the following steps: carrying out heating treatment on biomass straws by using alkali liquor with the concentration of 6-10wt%, washing and neutralizing, then adding cellulase for enzymolysis, and carrying out mechanical pulping after inactivation, so as to obtain wheat straw biochemical mechanical pulp; defibering and screening the wheat straw biochemical mechanical pulp to obtain fine fibers, performing ultra-fine particle grinding on the fine fibers to obtain a lignin-containing nanocellulose dispersion liquid, and performing vacuum filtration and drying to obtain the lignin-containing nanocellulose composite material. The preparation process is mild in reaction condition and low in production cost, the obtained nanocellulose membrane has high mechanical strength, and the maximum breaking stress can reach 100 MPa.

The invention is mainly used in the technical field of photovoltaic power generation. The invention discloses a photovoltaic power generation intelligent insulation detection system which comprises a host and a plurality of subsystems. Each subsystem comprises an extension set, a photovoltaic direct current assembly composed of a plurality of photovoltaic strings, and a detection device; the extension set is respectively connected with each photovoltaic string in the photovoltaic direct current assembly and is used for controlling each photovoltaic string to be in an on state or an off state and sending a detection instruction aiming at a target photovoltaic string to the detection device; the detection device is used for performing insulation resistance detection on the target photovoltaic string when receiving the detection instruction and feeding back a detection result to the corresponding extension set; and the host is in communication connection with each extension set and is used for acquiring the insulation detection results and the operation data of all the photovoltaic group strings in each subsystem and carrying out data analysis. According to the invention, the safety and reliability, the operation and maintenance efficiency and the digital management level of a large-scale photovoltaic system can be improved.

The application discloses a method for treating antibiotic wastewater by using a graphdiyne / ferrous indium sulfide nanocomposite to activate persulfate, and the method is characterized by using the graphdiyne / ferrous indium sulfide nanocomposite as a catalyst to activate persulfate for degrading and treating antibiotic wastewater, wherein the graphdiyne / ferrous indium sulfide nanocomposite comprises ferrous indium sulfide nanoparticles, and the nanoparticles are loaded with graphdiyne nanosheets. The method for treating antibiotic wastewater by using the graphdiyne / ferrous indium sulfide nanocomposite to activate persulfate uses the graphdiyne / ferrous indium sulfide nanocomposite as a catalyst, wherein the nanocomposite has many reactive sites, high catalytic activity and good stability, can efficiently activate persulfate with a smaller amount of catalyst, can efficiently remove antibiotics in wastewater, and has the advantages of low cost, high treatment efficiency, good removal effect, green environmental protection and the like, and therefore, the method has important significance for effectively purifying antibiotic wastewater, has high use value and good application prospect.

This invention provides a highly efficient dehydration method for energetic and water-containing waste HTPB propellant, comprising: Step 1, barrier coupling sheet preparation: Under low temperature conditions of 5-10℃, the energetic and water-containing waste HTPB propellant is placed inside a barrier, protected by an inert gas, and pressed into propellant sheets with a thickness ≤1mm using a two-roller press; Step 2, fiber-like capillary adsorption: The propellant sheets obtained in Step 1 are spread flat on the surface of a multi-level porous fiber-like capillary matrix, and allowed to adsorb statically. Through capillary effect, free water on the surface of the propellant sheets is driven to migrate along the porous channels of the matrix and be captured, removing the surface free water; The fiber-like capillary matrix is ​​composed of a cellulose skeleton phase, a silica aerogel porous control phase, a hydroxylated nanocellulose interface functional phase, and a polyurethane substrate supporting and stabilizing phase; Step 3, negative pressure physical dehydration; Step 4, chemical selective dehydration; Step 5, safe recycling. This invention has high dehydration efficiency, retains thermal stability, is safe and controllable, and has low cost.

The present application relates to the technical field of molecular biology, and discloses a goat whole genome 50K breeding chip and application thereof. The present application is based on whole genome resequencing data of goat populations (more than 500) covering domestic local, breeding and foreign introduced breeds, and filters functional marker information significantly related to 14 economic traits of goats, such as growth and development, slaughter, reproduction, wool production and milk production, through whole genome association analysis and selection signal analysis. The probe combination contains 50,000 SNP sites. The goat whole genome 50K breeding chip has the characteristics of strong cross-breed universality, high detection accuracy and comprehensive functional information, and can be widely applied to goat genetic diversity analysis, whole genome association analysis, whole genome selection breeding and other aspects, and can significantly shorten the breeding cycle and reduce the typing cost.

The invention discloses an all-optomagnetic turnover magnetic film as well as a preparation method and application thereof. The all-optical magnetic turnover magnetic film comprises a Ta layer, a first Pt layer, a Co layer, a Ru layer, a Gd layer and a second Pt layer which are sequentially stacked on the surface of a substrate, wherein the thickness of the Ru layer is 0.8 nm, 1.3 nm or 1.5 nm. The preparation method of the all-optical magnetic flipping magnetic film comprises the following steps: sequentially depositing a Ta layer, a first Pt layer, a Co layer, a Ru layer, a Gd layer and a second Pt layer on the surface of a substrate by adopting ultrahigh vacuum direct current magnetron sputtering to obtain the all-optical magnetic flipping magnetic film. The all-optical magnetic flipping magnetic film has the advantages of high switching efficiency, low switching energy, wide energy window, easiness in regulation and control, stability in repeated writing and the like, can be applied to the fields of high-density ultrafast magnetic storage, information processing and the like, and is suitable for large-scale application.

The invention relates to a copper-indium-silver catalyst, a preparation method thereof and a method for preparing synthesis gas with an adjustable ratio of carbon monoxide to hydrogen through electrocatalysis of carbon dioxide. The preparation method comprises the following steps: dispersing a multi-walled carbon nanotube in water to obtain a dispersion liquid A; dispersing copper nitrate trihydrate, indium nitrate hydrate and silver nitrate in water to obtain dispersion liquid B; mixing the dispersion liquid A and the dispersion liquid B to obtain dispersion liquid C; adding alkali into the dispersion liquid C to obtain a mixed solution D; and filtering and drying the mixed solution to obtain the copper-indium-silver electrocatalyst. The invention also provides the copper-indium-silver catalyst prepared by the method and a method for preparing synthesis gas with an adjustable ratio of carbon monoxide to hydrogen by electrocatalysis of carbon dioxide. According to the copper-indium-silver electrocatalyst provided by the invention, an electron-rich Cu site is formed by utilizing the synergistic effect of three metals, CO2 adsorption and CO desorption are promoted, and HER is inhibited, so that CO2RR and HER are balanced, and the selectivity of carbon monoxide synthesis gas is effectively improved.

The invention discloses a water supply plant sedimentation tank floc recycling system and method and a composite carrier material, and belongs to the technical field of water supply plant water treatment. The system comprises a monitoring regulation and control module which is used for collecting floc state data of a sedimentation tank in real time and outputting a control signal according to the floc state data; the composite carrier material supply module is used for adding a composite carrier material into the floc activation reactor according to the control signal; the floc backflow mechanism is used for adjusting recycled floc entering the floc activation reactor according to the control signal; and the floc activation reactor is used for receiving the composite carrier material and the recycled floc and carrying out three-stage activation treatment under the action of an internal flow field to obtain regenerated floc. Solid waste recycling is achieved through floc recycling, and the sludge discharge amount is reduced; and the monitoring regulation and control module combines fuzzy PID with an LSTM model, accurately matches processing requirements, and improves operation stability. According to the invention, the technical problem of floc recycling and reusing is solved.

The application discloses a fluorescent particle induced ultra-transmittance radiation refrigeration film and a preparation method and application thereof. The preparation method comprises the following steps: uniformly mixing DCPDA monomers, graphene quantum dot dispersion liquid and an ultraviolet curing agent to obtain a mixed solution; concentrating the mixed solution to obtain a casting solution; coating the casting solution on the surface of a substrate to obtain a wet film; and curing the wet film to obtain the fluorescent particle induced ultra-transmittance radiation refrigeration film. By introducing the fluorescent particles into a polymer matrix and adding the ultraviolet curing agent, the fluorescent particle induced ultra-transmittance radiation refrigeration film is formed, the high transmittance of sunlight and the high infrared emissivity are realized, the radiation refrigeration performance of the fluorescent particle induced ultra-transmittance radiation refrigeration film is excellent, and the fluorescent particle induced ultra-transmittance radiation refrigeration film is suitable for building energy saving, photovoltaic cell cooling and cold chain transportation and the like. The preparation process is simple and suitable for large-scale application.

This invention discloses a method and apparatus for identifying landslide cracks based on neighborhood-wide perceptual hierarchical convolution. First, the invention calculates the deep spatial features of each point based on the 3D data of the landslide point cloud. Then, these features and the point cloud data are used as input to the network. Next, the network is used to find the descriptive points with the best detailed structural representation within the neighborhood of the landslide crack and divides them into sub-neighborhoods. Then, by using the sub-neighborhoods corresponding to the determined descriptive points and combining them with the spatial features of the point cloud data in each sub-neighborhood, the fine local features of the landslide cracks are extracted. Finally, based on the extracted fine local features, the landslide cracks can be identified. Therefore, this invention, through spatial features and sub-neighborhood division, extracts local features, focusing on the overall structural morphology of the landslide cracks. This reduces misjudgments and omissions caused by complex terrain variations, thereby improving the accuracy of landslide crack identification.

The invention discloses a goods accompanying sheet photographing and warehousing method and device based on correction prompt, and a storage medium, and the method achieves the quality evaluation of a target goods accompanying sheet image through an image quality evaluation model, and outputs image photographing correction guide prompt information when the quality does not meet a preset condition, so as to prompt a user to carry out the correction photographing. Therefore, a shooting correction guiding function is realized; meanwhile, after the image quality of the obtained target accompanying sheet image meets the preset condition, a difference image used for representing the difference part between the target accompanying sheet image and the reference accompanying sheet image is extracted, only the difference image is uploaded, and finally, the target accompanying sheet image and the reference accompanying sheet image are obtained. And the difference image and the reference accompanying sheet image are used to restore and obtain a target accompanying sheet image at the cloud end, and warehousing of the accompanying sheet can be completed. Therefore, only the difference part between the current image and the reference image is transmitted, compared with the traditional technology, the real-time performance is improved, the invalid background is reduced, and the problem of resource waste is avoided.

This invention discloses a high-speed centrifugal water injection purification and dewatering method for marine silica sand. This invention relates to the field of silica sand purification technology and includes the following steps: activating the silica sand; sieving the activated silica sand to remove impurities; mechanically grinding the sieved silica sand; treating the ground silica sand with centrifugal water injection, using centrifugal force combined with water injection to remove chloride ions and harmful substances from the silica sand; and dewatering the treated silica sand to obtain finished silica sand. By combining activation treatment, mechanical grinding, and centrifugal water injection purification, chloride ions and impurities such as shells and mud can be effectively removed from the silica sand. This process adopts a step-by-step treatment method: first, activation loosens the colloids on the surface of the silica sand; then, mechanical grinding breaks down the colloidal layer structure; and finally, centrifugal force combined with water injection separates the soluble salts from the silica sand, achieving deep purification of the silica sand.

The present invention discloses an intelligent pillow system with multi-zone airbag adjustment. The present invention precisely senses the head position and sleeping posture through a high-density fiber pressure sensor array, and based on this information, drives an innovative "single air pump + multiple electronic control valves" and "integral airbag + partitioned air conduction" structure, achieving remarkable beneficial effects: First, by immediately triggering the overall descent protection when the head is tilted up / down, it can actively prevent hyperextension and hyperflexion of the cervical vertebra, effectively reducing the risk of neck pain and discomfort. Second, the sensor without protrusions embedded and the PWM smooth adjustment of the airbag ensure a comfortable experience; the system adopts a single power unit and logical partition design, greatly simplifying the air circuit, significantly reducing the hardware cost, power consumption, and the failure rate of easy leakage in multi-chambers, and improving the reliability. In addition, the interaction mode combining user-set instructions and automatic recognition takes into account both convenience and personalization, and the self-learning module enables the pillow to continuously adapt to the user's habits, achieving long-term precise personalized support.

The invention provides fluorescence sensor nanoparticles based on thrombin, a preparation method of the fluorescence sensor nanoparticles, a thrombin activity detection method, an anticoagulant active substance in ligusticum wallichii and a screening method of the anticoagulant active substance, and belongs to the technical field of nanometer fluorescence sensors and traditional Chinese medicine active ingredients. The fluorescence sensor nano particles are prepared by crosslinking and assembling AIE515 and a thrombin substrate S-2238. When the thrombin exists, the thrombin cuts off the thrombin substrate S-2238, so that the nanoparticles of the fluorescence sensor are decomposed, and the aggregation-induced fluorescence intensity is reduced. The fluorescence sensor nanoparticles provided by the invention can realize rapid detection of thrombin activity, and also can realize rapid screening of anticoagulant components in traditional Chinese medicine ligusticum wallichii.

The utility model provides a convenient tire loading and unloading device with a protective structure, and relates to the technical field of tire loading and unloading devices. The lifting device comprises a bottom frame and a supporting frame and further comprises a lifting structure and a fixing structure, the lifting structure comprises a driving assembly, a lifting frame and pulleys, the driving assembly is arranged at the top end of the supporting frame, the pulleys are arranged on the inner side wall of the supporting frame, and the lifting frame slides up and down along the inner side wall of the supporting frame through the pulleys. The fixing structure comprises a fixing steel fork and a jack, the fixing steel fork is arranged at the bottom end of the lifting frame, a mounting frame is arranged at the middle end of the supporting frame, and the jack is arranged on the mounting frame. The device is simple in structure and convenient to operate, the direction of the engineering tire is adjusted through small force, labor-consuming operation of workers is not needed, convenience and efficiency of assembly and disassembly of the engineering tire can be effectively improved, and the labor intensity of the workers is reduced.

The invention provides a ternary positive electrode material and a preparation method and application thereof, the ternary positive electrode material comprises a mixture of LiNi < x > Co < y > Mn < z > O < 2 > particles coated with LiF, LiF particles and MgO particles, x is greater than 0, y is greater than 0, z is greater than 0, and x + y + z = 1. According to the ternary positive electrode material provided by the invention, direct contact between the positive electrode material and an electrolyte can be reduced through LiF coating, side reaction is reduced, LiF particles and MgO particles can gradually release F <-> and Mg < 2 + > in the working process of a battery, and in-situ doping of a material bulk phase is realized to stabilize the structure, so that the cycling stability of the battery is effectively improved; in addition, the preparation method provided by the invention is simple and suitable for large-scale application.

This invention discloses a method and application for constructing personalized organoids for multiple myeloma based on stiffness gradient regulation, belonging to the field of biomedical technology. The method includes the following steps: S1: mixing patient bone marrow plasma with a calcium-containing crosslinking agent to form a gelatable precursor; S2: combining the gelatable precursor with a three-dimensional gelatin scaffold having a stiffness gradient (Young's modulus of 25-50 kPa) to construct a three-dimensional microenvironment simulating the stiffness gradient of bone marrow; S3: gelling the precursor to form a hydrogel-scaffold composite system encapsulating target cells; S4: seeding vascular endothelial cells onto the surface of the composite system to simulate a vascular niche structure. The organoid model for multiple myeloma constructed by this invention, based on the patient's autologous bone marrow plasma and possessing stiffness gradient characteristics, can effectively simulate the bone marrow mechanical microenvironment and preserve key components of the tumor microenvironment, supporting the long-term growth of primary tumor cells and improving the accuracy of drug sensitivity prediction.

The invention discloses a double-ship-lock salty-preventing and salty-discharging method based on a salty-collecting pit, and relates to the technical field of seawater invasion prevention and control. According to the double-ship-lock salt-preventing and salt-discharging method, based on cooperation of a double-ship-lock structure, a salt-collecting pit, a water conveying gallery and a salt-discharging channel, the opening sequence and time of the two ship locks are adjusted in a targeted mode, the two ship locks can be matched with each other when being started, and therefore salt water flowing upwards in a lock chamber can be fed into the lock chamber to the maximum extent and discharged into seawater, and the salt-preventing and salt-discharging effects are achieved. The problem of saltwater upstream caused when the ship lock is used is remarkably solved, the method has a positive effect on seawater intrusion prevention and control, and the method is high in navigation efficiency, easy to operate and suitable for large-scale application.

The invention discloses an organic-solvent-free high-efficiency normal-temperature passivator as well as a preparation method and application thereof. The preparation method comprises the following steps: preparing an acrylate emulsion by adopting a reactive emulsifier containing oil acid radicals, and mixing the acrylate emulsion serving as a main body and tannic acid-polyamine polymer particles serving as a filling agent to obtain the passivator. The surface of the pyrite tailings is coated and passivated through a spraying or dipping method, a passive film is formed at normal temperature, and tailings oxidation can be efficiently inhibited. The passivator takes water as a dispersion medium, does not need an organic solvent, and overcomes the limitation that an organosilane passivating material needs high-temperature curing and depends on the organic solvent. Coordination bonds are formed between oleate radicals and pyrite tailings, so that the adhesion performance of a passive film is improved; and the filler can further improve the density and oxidation resistance of the passivation film, so that the passivation performance of the passivator is improved. The passivator provided by the invention is simple in preparation process, green, environment-friendly, low in cost and suitable for large-scale application in the field of metal tailing treatment.

The utility model relates to an energy self-sufficiency system in a process of capturing carbon dioxide from tail gas of a gas turbine. The system comprises a high-grade energy recovery heating medium-tail gas heat exchanger, a middle-grade energy recovery amine liquid-tail gas heat exchanger and a low-grade energy recovery lean and rich amine liquid heat exchanger. By the adoption of the three-stage energy recovery system, energy in tail gas of the gas turbine can be recovered in a stepped mode, and self-sufficiency of carbon dioxide capture energy in the tail gas is achieved. The application of the technology not only greatly reduces the energy consumption in the carbon dioxide trapping process, but also has important significance for promoting sustainable utilization of energy and reducing industrial carbon emission. Through the efficient energy recovery technology, carbon dioxide capture can be completed without depending on external energy supply, development and application of the environmental protection technology are further promoted, and the method is suitable for large-scale marketization application.

The invention provides a stable-ligand CdSe / ZnS quantum dot based on multiple binding sites, a preparation method of the stable-ligand CdSe / ZnS quantum dot and a carrier-injection-free LED device. According to the scheme, the alanine modified long-chain alkylamine ligand is used, alanine endows the ligand with more sites which are mutually combined with the surfaces of the quantum dots, on one hand, more binding sites can passivate surface defects of the CdSe / ZnS quantum dots and improve the luminous efficiency, and on the other hand, the stability of the quantum dots can be improved; the prepared modified quantum dots can be applied to injection-free electroluminescent devices driven by a high-frequency alternating-current electric field.

This invention relates to the field of hot extrusion manufacturing technology, specifically to a high-strength weldable 6xxx series aluminum alloy profile, its manufacturing method, and its application. The aluminum alloy profile is composed of the following weight percentages: Si: 0.80%~1.2%, Fe≤0.20%, Cu: 0.40%~0.80%, Mn: 0.30%~0.70%, Mg: 0.70%~1.1%, Cr≤0.25%, Zn≤0.10%, Ti≤0.10%, Zr: 0.05%-0.20%, Pb<0.01%, with the balance being Al and unavoidable impurities. The profile meets the following performance requirements: tensile properties, R... m ≥420MPa, R p0.2 ≥330MPa, A 50mm ≥8.0%; Fatigue performance: at r=0.1, N=1×10 7 Under the same conditions, the fatigue strength σ of the smooth sample is ≥145MPa, realizing the lightweight manufacturing of high-speed trains.

The invention discloses a screening method and application of an Asian human NMOSD high-pathogenicity antibody, and belongs to the technical field of autoimmune disease diagnosis and treatment. The screening method comprises the following steps: screening an Asian human NMOSD patient with poor glucocorticoid treatment prognosis, extracting serum AQP4-IgG, carrying out specific capture through M23 type AQP4 transfection cells, combining with primary astrocyte C3 inducibility verification, and screening to obtain the high-pathogenicity antibody. The antibody can mediate construction of a glucocorticoid treatment resistant NMOSD animal model, and is applied to disease pathogenic mechanism research and targeted drug screening. The antibody is screened on the basis of clinical prognosis phenotype and functional characteristics, sequence identification is not needed, the technical blank of Asian human NMOSD high-pathogenicity antibody screening is filled, and the application value is remarkable.

The utility model relates to bird repeller technical field, concretely is a swing type ball bird repeller, the utility model discloses, including bottom plate, strong magnet, spring, sphere, connecting rod, card frame, mounting seat, screw rod and nut, the strong magnet is located bottom plate below, the mounting seat is fixed through screw rod and nut on bottom plate top, the sphere is located mounting seat top and is connected with mounting seat through spring, the connecting rod is located bottom plate one side, the card frame is located connecting rod one side, the strong magnet is rub magnet, adsorption is not less than 70 kilograms, the sphere is stainless steel mirror surface sphere, surface polishing to reflect light, the spring is compression spring, is set up in screw rod outside, makes sphere sway under the action of wind force, the connecting rod is U-shaped link, one end articulates in bottom plate, and the other end is equipped with the card frame. Solve the problem of complex installation, bird repelling mode single, unstable structure.

The application provides a low-thermal-conductivity, high-temperature-resistant, structure-ordered nanometer-layered calcium niobate heat-insulating coating, which has the advantages of low thermal conductivity and good thermal stability, and is suitable for being applied to a substrate with a heat-resistant temperature higher than 500 DEG C. Meanwhile, the application also provides a preparation method of the heat-insulating coating, which has the advantages of simple process, easy operation and high efficiency, and is suitable for large-scale application.

The application provides a negative electrolyte for an alkaline zinc-manganese flow battery, which is composed of a strong base, a zinc-containing active substance, a nitrogen-containing organic compound additive and deionized water. ‑2 The alkaline zinc-manganese flow battery adopting the electrolyte has a 60mA·cm ‑2 The Coulombic efficiency reaches 98.3%, the energy efficiency reaches 80%, the cycle life is improved from 48h to 155h, and the alkaline zinc-manganese flow battery has the advantages of low cost, simple process and wide application prospect.

The application provides a lithium iron phosphate cleaning wastewater recycling treatment system, characterized by comprising: a reaction tank, which is used for receiving lithium iron phosphate cleaning wastewater and performing a pretreatment reaction to obtain a pretreatment mixed solution; a dewatering device, which is used for receiving the pretreatment mixed solution and performing mud-water separation to obtain a pretreatment intermediate solution; a precision filter, which is used for receiving the pretreatment intermediate solution and performing precision filtration to obtain a pretreatment solution; an ultrafiltration device, which is used for receiving the pretreatment solution and performing ultrafiltration to obtain a reverse osmosis treatment solution; a first reverse osmosis device, which is used for receiving the reverse osmosis treatment solution and performing desalination treatment to obtain a first reverse osmosis clear solution; and a second reverse osmosis device, which is used for receiving the first reverse osmosis clear solution and performing desalination treatment to obtain recycled water, wherein the system has a high wastewater recycling ratio, low energy consumption and is suitable for large-scale industrial application. The application also provides a lithium iron phosphate cleaning wastewater recycling treatment method.

The invention relates to a method for effectively recovering phosphorus from aquaculture wastewater and reducing tetracycline antibiotic residues by using seawater as a magnesium source. Firstly, through a seawater pretreatment step, seawater is filtered and purified to remove impurities, and a clean magnesium source is provided for reaction. Next, in the phosphate precipitation stage, the pretreated seawater is added into the aquaculture wastewater, the pH value is adjusted to 8.0-10.5, preferably 9.0, and the magnesium / phosphorus molar ratio is set to be 1.0-2.0, preferably 1.8, so that the phosphate and magnesium ions are promoted to generate struvite precipitates. Rich positive ions in seawater and tetracycline antibiotics are used for competitively combining phosphate ions, so that adsorption and coprecipitation of the antibiotics are effectively reduced, and the content of the antibiotics in the product is reduced. And finally, separating and purifying the precipitate to obtain the struvite with high safety. The method is simple, low in cost, good in effect and suitable for large-scale wastewater treatment, and has important environment-friendly and economic values.