58results about How to "Good benefit" patented technology

The application discloses a rice nutrient precision monitoring and fertilization decision system based on multi-source data fusion, and particularly relates to the field of precision agriculture, and is used for solving the problems of nutrient monitoring deviation and inaccurate fertilization caused by spectral saturation during the rice vigorous growth period, and is achieved by the following steps: collecting red edge and near-infrared reflection from multiple angles, synchronously acquiring texture and structure images and fusing to generate an anti-saturation feature cube, outputting a vigorous growth period feature package by spatiotemporal segmentation at the phenological transition point, constructing a separable nitrogen trace spectrum by eliminating saturated response, outputting a prescription front graph by adjusting the balance coefficient under the calculation of energy concentration and water layer confluence indicators in a context constraint graph, and finally outputting an execution prescription graph by combining historical trajectories and micro-terrain to check the landing point, so that the vigorous growth period diagnosis precision is improved, over-fertilization or under-fertilization is avoided, and efficient nutrient management is realized.

The application relates to a water quality change trend rapid prediction method based on multi-source data fusion and physical constraints, and specifically comprises the following steps: step 1: synchronously collecting data such as spectrum information, DO, COD, temperature and pH at key monitoring sites, constructing a water dynamics-water quality coupling equation, and simulating the space-time dynamic distribution of water quality parameters; step 2: outputting a water quality sensitive area through a water dynamics-water quality model, screening sensor layout points by combining information entropy evaluation and spatial clustering, realizing low-cost water quality sensor network deployment through a multi-objective optimization algorithm, and calculating a water body global water quality distribution map by adopting a spatial interpolation method; step 3: analyzing main pollution sources according to the synchronous collection of spectrum information at key monitoring sites, and adopting principal component analysis and an attention mechanism neural network; step 4: based on real-time optical characteristic value-DO data, combining a spatial topological network, a water quality gradient and a cross-region covariance to capture the spatial correlation of water quality parameters between different points, and constructing an optical characteristic value-DO-COD dynamic prediction model; combining pollution tracing and spectrum characteristic correction to correct the COD prediction value, adopting ensemble Kalman filtering to assimilate multi-source data, and improving the model accuracy.

The present application belongs to the technical field of white carbon black preparation, and particularly relates to an industrialized preparation method for preparing high-purity low-fluorine white carbon black by taking fluorine-containing silicon slag as raw material, and through mechanical activation, composite alkali leaching, fractional impurity removal, low-temperature crystallization and surface modification. The present application can realize harmless disposal of the fluorine-containing silicon slag and high-value regeneration and utilization of fluorine and silicon resources, has good environmental protection value and economic benefits, and has wide industrialized application prospect.

The application discloses a kind of hardness correlation liver cancer lung premetastatic niche mouse model construction method, it includes the following steps: (1) in vitro enrichment respectively on the low hardness substrate of hardness 6kPa and the high hardness substrate of hardness 16kPa, the condition culture supernatant of mouse liver cancer cell Hepa1-6 that is cultured and grows, respectively named mL-CM and mH-CM;(2) mL-CM and mH-CM are respectively injected into two groups of mice using tail vein injection mode, every 1 day injection 1 time, until the 26th day, during continuous monitoring the recruitment of BMDCs in fresh lung tissue, while with the induction endpoint, i.e. 26th day premetastatic niche mark feature detection includes lung tissue matrix remodeling, immunosuppression, angiogenesis, vascular permeability and inflammation etc..The method has the advantages of short modeling cycle, easy operation, controllable induction condition, can comprehensively and accurately evaluate the common characteristics of liver cancer lung premetastatic niche formation etc..

The present invention discloses a controlled-release type polymeric ferric sulfate water treatment agent and its preparation method, belonging to the technical field of water treatment functional materials. The water treatment agent consists of polymeric ferric sulfate, an iron ion color indicator, a gel matrix, a cross-linking calcium agent, amino diatomaceous earth, a pore-forming agent and an inert filler. The preparation method includes: first preparing a network gel, then preparing soft materials, and finally obtaining the product through pill-making and drying. The present invention realizes the slow release and controllability of polymeric ferric sulfate, and the color indicator can directly reflect the consumption state of polymeric ferric sulfate, facilitating storage, transportation, dosing and recovery.

This invention discloses a method for testing the oxygen partial pressure of a pressurized oxygen supply mask. The pressurized oxygen supply mask is placed inside a sealed container. The data cable of the oxygen partial pressure sensor on the pressurized oxygen supply mask passes through the sealed container in a sealed manner. A vacuuming device and an oxygen supply device are connected to the outside of the sealed container. A temperature sensor for monitoring the internal temperature is installed on the sealed container. The sealed container is first evacuated and then filled with oxygen. The theoretical value of the oxygen partial pressure inside the sealed container is then calculated, and the corresponding phase value output by the oxygen partial pressure sensor is recorded. Then, the theoretical values ​​and phase values ​​of the oxygen partial pressure at different temperatures are collected, and the data is fitted to calibrate the parameters relating the measured value and the phase value of the oxygen partial pressure sensor. These parameters are then written into the oxygen partial pressure sensor. Finally, the theoretical value of the oxygen partial pressure is compared with the measured value of the oxygen partial pressure sensor to verify the accuracy of the oxygen partial pressure sensor. This method can accurately test the accuracy of the oxygen partial pressure sensor on a pressurized oxygen supply mask.

The invention discloses a method for preparing fluxed oxidized pellets based on hematite, and aims to solve the technical bottlenecks that high-proportion hematite pellets are difficult to grind and settle, high in roasting energy consumption and low in strength. The method comprises the following three core processes: S1, raw material pretreatment: performing wet ball milling, polyacrylamide-assisted sedimentation and ceramic vacuum filtration on coarse-grain hematite powder of which the particle size is less than 10mm, uniformly mixing with magnetite concentrate, and performing high-pressure roller milling treatment; s2, green pellets are prepared, specifically, the iron ore mixture is evenly mixed with bentonite, a calcium ferrite additive and a limestone flux, and qualified green pellets are prepared through a disc pelletizer; and S3, pellet roasting is conducted, specifically, green pellets are subjected to segmented drying, preheating and roasting in a chain grate-rotary kiln, and a finished product is obtained. According to the invention, the hematite with abundant reserves is used as a main raw material, and the compressive strength of the prepared oxidized pellets is more than 2500N / piece, the drum strength is more than 93%, the wear resistance index is less than 5%, and the prepared oxidized pellets have the cost advantage and the environmental protection benefit, and meet the high-efficiency smelting requirement of a blast furnace.

The invention discloses an artificial fish reef and an artificial fish reef putting method, and belongs to the technical field of water ecological restoration and fishery engineering. The artificial fish reef comprises a reef body, an anchoring structure and a take-up structure. The reef body is of a reinforced concrete frame structure, a bottom plate is closed, other faces are open, protective nets and cross beams are arranged on the side portions, the cross beams are connected through connecting rods, and planting boxes can be installed on the connecting rods. The anchoring structure comprises an anchor hook and an anchor chain, and the take-up structure comprises a take-up box, a take-up roller, a spring and a spring trigger assembly. Through cooperation of the trigger rod and the limiting rod, automatic retracting, releasing and anchoring of the anchor chain are achieved, the structure is stable, installation is convenient and fast, water flow scouring can be effectively reduced, the survival rate of submerged plants is increased, a spawning and inhabiting place is provided for fishes, and the fish gathering effect is remarkably improved.

The utility model discloses a cleaning mechanism of a forming machine, which belongs to the technical field of forming machine cleaning and comprises a forming machine body and a cleaning mechanism main body arranged on the forming machine body. The cleaning mechanism body comprises a cleaning piece used for cleaning the forming machine body, a driving piece used for driving the cleaning piece to move and a mounting frame used for mounting the driving piece. A mounting plate is arranged on the forming machine body, and the mounting frame is detachably connected with the mounting plate; the output end of the driving part is in transmission connection with the cleaning part so as to drive the cleaning part to reciprocate in the direction parallel to the to-be-cleaned surface of the forming machine body. Compared with a manual cleaning mode and a traditional mechanical cleaning mode, the cleaning mechanism of the forming machine with the structure has the advantages that the cleaning efficiency is greatly improved, the cleaning time is shortened, and continuous and stable operation of the forming machine is guaranteed.

The application discloses a kind of testing device and method for the characteristic parameters of vibration damper in airborne optoelectronic equipment damping system.The testing method comprises the following steps: connecting test base with vibration table;Connecting support with test base and vibration damper connector;Connecting vibration damper connector with support and the pair of vibration damper to be tested;Connecting load simulation with the pair of vibration damper to be tested;Installing the pair of vibration damper to be tested with testing device and fixing to vibration table;Fixing acceleration sensor;Performing broadband harmonic response acceleration sweep excitation;Obtaining natural resonant frequency and amplification of the pair of vibration damper;Solving axial stiffness, lateral stiffness and damping equation of the pair of vibration damper to be tested;Replacing the pair of vibration damper and repeating solving;Simultaneously solving axial stiffness, lateral stiffness and damping of single vibration damper.The method has good effect on testing characteristic parameters of vibration damper, strong practicability, and is worth promoting.

This utility model relates to a rolling angled pipe threader, belonging to the technical field of auxiliary equipment for pipe laying in utility tunnels. It solves the problems of fixed angles, easy wear on pipelines, and low efficiency in existing pipe threading support devices. The key features of this pipe threader solution include: two sets of supports are installed on the base of the pipe threader, each set containing a short support and a high support, with multiple rest positions on the high support; one end of each of the two fixed shafts is hinged to the short support, and the other end is adjustablely resting on a rest position on the high support to form a V-shaped support; two rollers are rotatably connected to the fixed shafts. It is mainly used for guiding the laying of cables or pipes in utility tunnels, reducing traction resistance and protecting the pipeline surface.

The utility model discloses a kind of perforating device of bundled straw biomass fuel, including frame, and frame is provided with perforating device, and perforating device includes linear power mechanism, mounting seat and punch assembly, the end surface of mounting seat is connected with linear power mechanism, and the other end surface is provided with punch assembly;The bottom of frame is provided with the positioning assembly for positioning straw bundle, and linear power mechanism drives punch assembly to carry out punching operation to the straw bundle after positioning. Linear power mechanism includes any one in hydraulic cylinder, cylinder, electric cylinder, and hydraulic cylinder is connected with hydraulic pump group and control valve group, cylinder is equipped with gas source equipment and solenoid valve, electric cylinder is electrically connected with servo driver and controller. The utility model punches in straw bundle, obtains straw bundle with air hole, increases airflow flow in straw bundle, effectively improves the combustion efficiency of whole straw bundle, can effectively reduce the volume and structure of combustion furnace, reduces combustion furnace investment cost.

The invention belongs to the technical field of coal blending and coking methods, and particularly relates to a coal blending and coking method for directionally regulating and controlling organic sulfur in coal gas. The method comprises the following steps: S1, respectively measuring conventional process indexes of single coking coal; S2, blending coal according to 0-9% of gas-fat coal, 30-44% of 1 / 3 coking coal, 11-16% of fat coal, 30-38% of coking coal and 10-14% of lean coal; s3, calculating the total sulfur of the mixed coal, and predicting the total sulfur of coke and the total organic sulfur in the coal gas by utilizing the prediction model; s4, when the total sulfur of the mixed coal is not changed, adding the low-sulfur gas-fat coal or reducing the proportion of the high-volatile gas-fat coal; s5, carrying out a small coke oven simulation coking test on the optimized blended coal, and determining a final coking coal ratio according to a test result; and S6, crushing the mixed coal sample, and then carrying out coking operation. On the premise of meeting the quality requirement of the high-quality metallurgical coke, the high-sulfur coal resource with a certain price advantage can be scientifically and reasonably matched.

This utility model provides a self-cleaning photovoltaic panel, including a photovoltaic support frame, a photovoltaic panel mounted on the photovoltaic support frame, a water guide channel below the photovoltaic panel, and a circulating water tank located below one side of the water guide channel. The photovoltaic support frame includes a front support frame and a rear support frame, with a diagonal support frame between the front and rear support frames. The photovoltaic panel is mounted on the diagonal support frame, and the photovoltaic panel includes an upper photovoltaic panel and a lower photovoltaic panel. A detachable intermediate sieve is located between the upper and lower photovoltaic panels, and a water spray pipe is mounted on the top of the upper photovoltaic panel. This invention solves the problem that most existing photovoltaic equipment lacks effective utilization of rainwater.

This disclosure relates to a method and system for monitoring displacement of high slopes. The method includes the following steps: arranging and constructing monitoring holes: excavating monitoring holes of a certain depth along the Z-direction in the target slope area; burying monitoring pipes: inserting monitoring pipes section by section into the monitoring holes from bottom to top, and connecting the sections of the monitoring pipes together; inclinometer measurement: placing inclinometer probes at different measuring points inside the monitoring pipes to measure the inclination angles of each segment of the monitoring pipe axis in the X and Y directions; calculating horizontal plane coordinates: calculating the horizontal plane coordinates of each measuring point based on the obtained inclination angles; repeating the above steps to obtain the horizontal plane coordinates for at least two measurements, and subtracting the horizontal plane coordinates of the current measurement from the previous measurement to obtain the horizontal displacement of the target slope area within the time interval between the two measurements. The system is used to implement the above method. This disclosure can monitor deep horizontal displacement of slopes and has the advantages of accurate, reliable, and efficient monitoring.

The invention provides a new energy base multi-objective optimization planning method based on GIS data processing and elastic load curve modeling, and the method comprises the steps: obtaining a GIS data set and rasterized data of a research region, and obtaining a historical load data set, electric equipment characteristics and a historical power parameter set of a receiving end region; constructing an elastic load curve according to the historical load data set, the electric equipment characteristics, the new energy equipment parameters and the historical electric power parameters; obtaining a constructable area according to the GIS data set, the transmission and distribution channel division and the rasterized data; and according to the elastic load curve and the constructable area, constructing an optimization model with optimization objectives including minimization of total investment cost, minimization of ecological influence and maximization of power supply reliability to obtain an optimal planning scheme, and planning a new energy base in the research area. According to the method, damage to the ecological environment can be effectively avoided, the construction difficulty and risk are reduced, and the obtained planning scheme achieves optimal balance in the aspects of economy, ecology, power supply and the like.

The application discloses a kind of service concrete penetration type anti-freezing protective material and preparation method thereof, belong to concrete protection technical field.The composition of the protective material is: organic silicon modified penetration enhancement component 30~60 parts, nano-crystalline component 10~30 parts, microbial self-repairing component 5~20 parts, composite silane coupling agent 2~8 parts, penetration accelerator 1~5 parts, stabilizer 0.5~3 parts, defoaming agent 0.1~1 part, water 10~50 parts.The application constructs "hydrophobic barrier-crystallization densification-microbial self-repairing" triple synergistic protection system, solves the technical bottleneck that existing concrete protective material penetration depth is shallow, long-acting protection stability is poor, has no active crack repair capacity, construction is complicated, and on-site adaptability is poor.The application preparation process is simple, product performance is stable, cost-effective, can long-acting improve the frost resistance of concrete structure in severe cold area.

The invention belongs to the technical field of carbon dioxide miscible-phase oil displacement, and particularly relates to a mixing reducer for carbon dioxide oil displacement as well as a preparation method and application thereof. The mixing reducer comprises a solvent and a solute, and the solute is formed by mixing a zwitterionic surfactant, a zwitterionic nonionic surfactant, an anionic sulfonate surfactant and a gemini nonionic surfactant. The mass ratio of the zwitterionic surfactant to the zwitterionic nonionic surfactant to the anionic sulfonate surfactant to the gemini nonionic surfactant is (3-9): (1-5): (5-12): (4-11). Four different types of surfactants are combined, due to the electrostatic attraction effect between electron groups of selected substances, a compact composite interfacial film of ionic crosslinking and nonionic filling is finally formed, the minimum miscible phase pressure of carbon dioxide in crude oil can be substantially reduced theoretically, and good environmental adaptability is achieved; and dissolution is not easy to occur at the reformation temperature.

The application provides a multi-stage flexible shaft roller-brush combined garlic fruit-soil separation equipment and method, wherein the initial selection component, the first-stage cleaning unit and the second-stage cleaning unit are sequentially arranged in the box from front to back. The initial selection component is a plurality of aluminum alloy pipes arranged in parallel and inclined as a whole, the first-stage cleaning unit adopts a cleaning screen arranged in an inclined manner and having an arc-shaped front part to ensure the flexible falling of garlic, the cleaning screen is driven by a motor to realize reciprocating motion and perform first-stage cleaning, and the second-stage cleaning unit includes a plurality of soil cleaning shaft rollers and soil cleaning brushes driven by motors and cooperates with each other to perform second-stage cleaning. After two-stage cleaning, the soil cleaning quality is effectively ensured, and subsequent secondary manual cleaning is not needed, thereby saving time and effort. The working parameters of the two-stage soil cleaning devices can be respectively set according to the characteristic differences of the garlic-soil mixture at different stages in the device, so that the soil cleaning efficiency is improved. The cleaning baffle is arranged at the end of the first-stage cleaning unit through a torque hinge, the amount of returned soil in the soil cleaning process is reduced, the garlic-soil accumulation is avoided, and the blockage is reduced.

The invention discloses a method for separating rare earth and fluoroaluminum in a high-fluoroaluminum and low-rare-earth-content material, and belongs to the field of rare earth hydrometallurgy. Aiming at the technical problems of poor selectivity and easiness in emulsification when the materials are treated by an existing single extraction system, a five-component synergistic extraction system is adopted, a mixed extraction agent is prepared according to the volume ratio of P204: P507: TBP: sec-octanol: diluent, and after hydrochloric acid pretreatment and ammonia water saponification, three-stage to six-stage counter-current extraction is carried out on the mixed extraction agent and the pretreated material liquid subjected to pH regulation. Rare earth is selectively extracted into an organic phase, fluorine and aluminum are enriched in raffinate, and efficient separation is achieved. And the rare earth-loaded organic phase is subjected to reverse extraction with high-concentration hydrochloric acid to obtain a concentrated rare earth solution, and trace rare earth in raffinate can be recovered through oxalic acid precipitation. Through the synergistic effect of specific components, the separation selectivity is remarkably improved, extraction emulsification is effectively avoided, stable operation of the process is guaranteed, and the method is particularly suitable for efficient treatment of complex high-fluorine-aluminum low-rare-earth materials.

This utility model relates to the field of sealing conduits, and particularly to a sealing device for conduits, comprising a gripping rod, a pressurizing component, a pressure line, and an injection mechanism for extending into the conduit port. The end of the gripping rod is detachably connected to a storage container for adhesive, and the injection mechanism is detachably connected to the outlet of the storage container for adhesive, with an injection port communicating with the outlet. The pressurizing component is connected to the pressure line, which is detachably connected to the storage container for adhesive. The operator uses the gripping rod to raise the storage container for adhesive to a designated position and inserts the injection mechanism into the conduit port. Pressure is transmitted through the pressure line to inject adhesive into the conduit port, achieving the purpose of sealing the conduit at a high location. When sealing conduit ports at high locations, scaffolding is avoided, reducing scaffolding costs and ensuring the safety of workers.

The utility model relates to the technical field of building construction edge protection, and discloses a turnover edge protection device of a quick-release ring lock type scaffold, which comprises a connecting vertical rod, and the connecting vertical rod is connected with a conventional vertical rod of the ring lock type scaffold through a telescopic cross rod; disks are evenly welded to the connecting vertical rod and the conventional vertical rod at intervals in the length direction, one end of the telescopic transverse rod is fixed to the disc of the conventional vertical rod, and the other end of the telescopic transverse rod is fixed to the disc of the connecting vertical rod. Connecting pieces are arranged on the vertical rod pieces between every two adjacent discs on the upper portions of the connecting vertical rods from top to bottom, and socket pieces connected with the connecting pieces are arranged on the two sides of the connecting meshes; the distance between the edge protection net formed by the connecting net pieces and the plate face of the ring-lock type scaffold can be adjusted according to the telescopic transverse rods. The connecting structure can solve the lap joint problem existing in the connecting mode of the edge protective rails and the plate buckle type scaffold for partition pouring of the basement roof, is suitable for the environment with complex construction site operation, and is convenient to install and easy to popularize.

The application relates to the technical field of clean room air conditioner air outlet design, in particular to a clean room air conditioner air outlet optimization design method based on fluid dynamics; through construction of a multi-physical field coupling simulation model based on a fluid dynamics model, accurate prediction of a temperature field, a flow velocity field and a pollutant concentration field in the clean room is realized; the method takes Reynolds average NS equations and a discrete phase model as cores, combines a Standard k-epsilon turbulent flow model and a wall surface function method, effectively captures complex air flow organization and particle diffusion behavior in the clean room, provides a high-precision data basis for subsequent multi-target optimization, minimizes energy consumption under the premise of guaranteeing air quality, and has important engineering application value; and the technical problem that existing clean room air conditioner air outlet design methods mainly depend on experience and industry standards or focus on optimization of a single parameter and fail to fully consider the action of multiple factors is solved.

The application discloses a kind of weather-resistant ultraviolet-resistant overhead insulated cable and preparation method thereof.Cable is sequentially arranged with rare earth aluminum alloy conductor with alumina ceramic membrane, conductor shielding layer, gradient functional composite insulation layer and biomimetic super-hydrophobic outer sheath from inside to outside, and passive surface acoustic wave sensing component is uniformly laid out.The insulation layer is three-layer co-extrusion molding: heat-conducting insulation inner layer filler is radially oriented, self-repairing enhanced middle layer contains dynamic covalent bond and photo-thermal microcapsule, and weather-resistant ultraviolet-resistant outer layer is compounded with core-shell ultraviolet shielding agent.The outer sheath is modified with fluorosilane, and the water contact angle is greater than or equal to 150°.The sensing component wirelessly monitors temperature, ultraviolet cumulative dose and deformation.The cable has a service life of more than thirty years, has natural light self-repairing and passive online monitoring functions, has strong environmental adaptability, and has low operation and maintenance cost.

This invention belongs to the field of weaving equipment technology and discloses a pretreatment device for a circular loom, including a housing with multiple ferrules installed at the bottom. One end of the housing is fixedly installed with an inlet plate having multiple inlet guide holes. Inside the housing, along the yarn travel direction, are sequentially arranged an infrared heating tube group, an atomizing nozzle group, a parallel electrode plate, a simulated weaving guide roller group, a low-temperature plasma generator, a heated pressure roller group, and a cold air cooling unit. The other end of the housing is fixedly installed with an outlet plate having multiple outlet guide holes. This device integrates multiple pretreatment functions into one housing, realizing integrated continuous operation of yarn pretreatment. It can effectively release internal yarn stress, remove surface fuzz from the yarn, improve yarn flexibility and surface quality, thereby reducing the shrinkage rate of the base fabric, reducing yarn breakage during weaving, improving the production efficiency and product quality of the circular loom, and reducing production costs.

This utility model discloses a traction and storage device for flexible 3D printing consumables, comprising: a first platform; two sets of side supports, fixedly and spaced apart on the top of the first platform; two sets of guide rods fixedly connected to the top of the side supports; upper adjusting blocks movably sleeved on the two sets of guide rods; bearings fixedly embedded in the inner side of the upper adjusting blocks; and a machine top fixedly connected to the upper end of the guide rods. A PLC control system is provided on the top of the machine top; and two sets of first lower traction rollers are provided between the two sets of side supports. This application, by setting an adaptive buffer roller structure and using a spring-loaded soft compression method to pull out the flexible consumables, provides buffering for the consumables during high-speed traction, effectively preventing deformation and ensuring that the consumables are stably extruded while remaining in the center of the rollers. This greatly reduces the risk of consumables deviating or getting caught in the shaft, and improves the stability and continuity of production.

The utility model discloses a kind of washable silicone rubber memory pillow, including memory cotton layer and silicone rubber sponge layer which are sequentially stacked from top to bottom, and the both are fixedly connected by cementing or sewing method.The connecting surface of memory cotton layer and silicone rubber sponge layer is "3" type wave surface, form two convex surfaces and a concave surface, memory cotton layer front and rear two ends are equipped with the supporting portion of the wrapped silicone rubber sponge layer, recess is equipped between two supporting portions and located above concave surface.Memory cotton layer uses the slow-rebound memory cotton material with the density of 30-50D, and the breathable through-hole with the diameter of 0.5-3mm is evenly distributed inside;Silicone rubber sponge layer uses the slow-rebound silicone rubber sponge with the density of 40-80D, and the honeycomb-shaped breathable pore channel structure that is interconnected is formed inside.The pillow is through layered structure and wave surface design, accurately adapt to human head and neck curve, improve support and comfort, while having excellent washability and breathable performance.

This invention belongs to the field of solid waste material preparation technology, aiming to solve the problems of poor synergistic effect and weak density of existing solid waste-based gels. It provides a method for preparing a multi-source solid waste-based gel, comprising the following steps: preparing modified sodium polyacrylate; chemically modifying the surface of multi-source solid waste powder in a container using a silane coupling agent modification solution to obtain modified multi-source solid waste powder; mixing the modified multi-source solid waste powder with deionized water to obtain a multi-source solid waste composite gelling material; mixing the modified sodium polyacrylate with the multi-source solid waste composite gelling material and stirring until a gel state is reached, then adding sodium hydroxide solution for neutralization to obtain a solid waste-based composite gel; subjecting the solid waste-based composite gel to hydrothermal strengthening treatment and immersing it in CaCl2 solution, then removing the solid waste-based composite gel and drying it to obtain the multi-source solid waste-based gel. This method overcomes the defects of traditional inorganic gels, such as easy cracking and powdering, and gives the gel excellent water retention.

The invention provides a method for directly preparing biurea from benzophenonetazine, which comprises the following steps of: adding an acid catalyst into a mixed solution of benzophenonetazine, urea and an organic solvent, heating for reaction, and finally centrifugally separating to directly obtain the biurea. The benzophenonetazine and the urea are used as raw materials, the raw materials are dissolved in the reaction solvent, the reaction product biurea is not dissolved in the reaction solvent, the product is easy to separate and purify, inorganic salt and ammonia nitrogen wastewater are not generated in the reaction, the technological process is simple, and the method has the advantages of being easy to implement industrially and remarkable in economic benefit.

The present application relates to a method for co-production of lithium carbonate series products from lithium-containing solution. The method uses purified sodium carbonate solution to precipitate lithium carbonate, which is then converted into lithium bicarbonate solution, filtered and decarburized, and through optimization of conventional purification process steps and parameters, high-purity lithium carbonate, battery-grade lithium carbonate and industrial-grade lithium carbonate products are obtained without introducing additional high-cost purification steps such as ion exchange resin / membrane. The process maximizes the use of lithium-containing solution, shortens the process flow and time, and has good economic benefits. At the same time, the by-products of each stage of the scheme can be reused, only a small amount of waste solution is produced, which can realize the recycling of mother liquor, improve the comprehensive yield of products, and effectively reduce the comprehensive cost.