658 results about "Post treatment" patented technology

The invention provides a multiphase collaborative purification intelligent treatment system for heavy metal wastewater, which relates to the technical field of wastewater treatment and comprises a pretreatment module, a main treatment module, an advanced treatment module, a post-treatment and recycling module, a sludge treatment module and an intelligent control module. The intelligent control module comprises a data acquisition layer, a control layer and a management layer, and intelligent control on each treatment module is realized by monitoring parameters such as pH value, ORP (oxidation-reduction potential), conductivity and heavy metal ion concentration of the wastewater on line. The data acquisition layer acquires processing parameters in real time through various sensors; the control layer executes control logic based on the PLC / DCS and monitors the operation state through SCADA (Supervisory Control And Data Acquisition); the management layer adopts AI algorithms such as a water quality-energy consumption correlation regression model and a time sequence water quality fluctuation learning model to optimize processing parameters. According to the system, the treatment process can be intelligently adjusted according to the characteristics of the wastewater, the maximization of the heavy metal wastewater treatment efficiency, the minimization of chemical consumption and the minimization of energy consumption are realized, and the treatment effect and the system stability are improved.

The invention belongs to the technical field of nickel electrode slurry preparation, discloses a preparation process of ultra-fine particle size roll-printed nickel electrode slurry for an ultra-high capacity MLCC, and aims to solve the problems that in the prior art, ultra-fine nickel powder is easy to oxidize, the cost of covering nickel nitride powder is high, a covering layer is easy to damage and agglomerate during dispersion, and the performance of the slurry is poor. The method comprises three steps of raw material pretreatment, synchronization of material dispersion and nitridation, post-treatment and nitrogen protection, wherein the pretreatment is used for removing impurities and preventing oxidation, dispersion and nitridation are carried out synergistically through a sand mill and an ultrahigh-pressure homogenizer in a graded regulation and control mode, the post-treatment comprises filtering, inspection and double-layer vacuum packaging, the raw materials are prepared according to a specific proportion, key parameters are precisely regulated and controlled, and finally the slurry is prepared. Roll printing adaptability and co-firing requirements are met, independent nitridation and reduction procedures are omitted, cost is reduced, slurry uniformity, dispersion stability and MLCC reliability are improved, and large-scale mass production can be achieved.

The invention discloses a vacuum negative pressure vibration assisted precision casting forming method. The method comprises the steps of model preparation, sand box and dry sand pretreatment, layered vibration sand filling, film covering vacuumizing, molten metal smelting and purification treatment, negative pressure vibration pouring, pressure maintaining solidification, segmented temperature control and pressure relief box opening and multi-stage cleaning aftertreatment. The core of the method is that mechanical vibration and a vacuum negative pressure technology are deeply coordinated and penetrate through the whole process of modeling, pouring and solidification, and meanwhile, a series of fine control means such as dry sand accurate pretreatment, molten metal rotary blowing degassing and instantaneous inoculation, stepped negative pressure control, temperature-related segmented pressure relief and two-stage shot blasting cleaning are matched; through dynamic cooperation of vibration and negative pressure, the sand mold compaction uniformity, the molten metal mold filling capacity and the solidification feeding effect are remarkably improved, the casting defects of air holes, shrinkage porosity, insufficient pouring and the like are effectively reduced, and the internal density, the size precision and the surface quality of a casting can be remarkably improved.

The invention belongs to the technical field of water treatment, and particularly provides a nitrogen-oxygen co-doped hypha / spruce composite adsorption material and a copper-containing sewage treatment method. According to the invention, the copper-containing sewage is pretreated by using the solid fermentation product, and then the copper-containing sewage is post-treated by using the nitrogen-oxygen co-doped hypha / spruce composite adsorption material prepared under specific conditions; wherein in the pretreatment stage, microbial metabolites in a solid fermentation product preliminarily capture free copper ions (Cu < 2 + >) through complexation, the toxicity of the sewage is reduced, and meanwhile, the copper ions are partially converted into a form which is easier to adsorb. In the post-treatment stage, the nitrogen-oxygen co-doped hypha / spruce composite adsorption material plays a key role, and efficient interception and adsorption of copper ions are achieved. In conclusion, the treatment method for the copper-containing sewage comprises a pretreatment stage and a post-treatment stage, the two stages are in synergistic interaction, and finally the removal rate of the heavy metal copper can be effectively increased.

The invention relates to the technical field of plastic molding and treatment, and discloses a molding processing and post-treatment process of low-odor plastic, which comprises the following steps: extruding a plastic melt containing volatile components into a to-be-cut material strip, pelletizing in a pelletizing area by using a pelletizing device, and synchronously adjusting the pulse spraying frequency to adapt to the pelletizing frequency, an alternating stress field is induced on the surface layer of a material strip through periodic cold impact and mechanical vibration, a micro-crack structure is formed on the surface layer of plastic particles by controlling the particle size of atomized liquid drops, an exhaust channel for volatile component escape is constructed, and then the plastic particles are conveyed to post-treatment equipment for volatile component removal. A solid diffusion process blocked by a skin layer is converted into a physical inrush flow along a microcrack channel, so that a mass transfer energy barrier is reduced, efficient removal of peculiar smell components is realized, and thermal degradation and yellowing of particles are avoided.

The invention relates to the technical field of electrochemical water treatment, and discloses a high-salt waste liquid electric flocculation hardness removal and electrodialysis resourceful treatment method and a high-salt waste liquid electric flocculation hardness removal and electrodialysis resourceful treatment system. The method comprises the following steps: collecting water quality parameters of the high-salt waste liquid and initial electrochemical impedance spectroscopy parameters of a polar plate; calculating the initial current density according to the hardness and the conductivity, carrying out electric flocculation treatment, monitoring impedance spectrum change in real time, identifying the scaling type, and predicting the residual operation time of the polar plate; the current density is optimized according to the prediction time, and the residual hardness is calculated; and adjusting electrodialysis parameters by taking the residual hardness as a feedforward signal for concentration, and performing bipolar membrane electrodialysis on the concentrated solution to obtain acid-alkali liquor. The problems that in the electrochemical treatment process of the high-salt waste liquid, the state of a polar plate cannot be monitored in real time, consequently, operation parameters are adjusted blindly, and energy consumption is high and the recycling efficiency is low due to the fact that parameters of a pretreatment unit and parameters of a pretreatment unit are not linked are solved.

The invention relates to a preparation method of soybean oil base polyhydric alcohol, in particular to a method for preparing soybean oil base polyhydric alcohol by directly using soybean oil. The soybean oil diluted by using a solvent reacts with hydrogen peroxide with the weight percentage being 30% for 2-5 hours at the temperature of 60-70 DEG C under catalysis of a catalyst with the weight percentage being 3-5%; vacuum distillation is conducted after the reaction is ended, and the solvent is evaporated; then low alcohol is added in a reactor to be subjected to a reaction for 4-6 hours under the pressure of 0.3-0.4 MPa and at the temperature of 70-80 DEG C, then the reaction is stopped, and the soybean oil base polyhydric alcohol is obtained. The method saves the using amount of hydrogen peroxide, reduces the post-treatment steps, and simplifies the production procedures, and accordingly the product cost is declined directly.

The invention discloses an automatic treatment device and method for metal workpiece surface polishing and application. According to the automatic environment-friendly electrochemical polishing device, the workpieces are automatically transferred through the automatic conveying device, automatic connection of all the procedures is achieved, and the automatic environment-friendly electrochemical polishing process of the metal workpieces such as the pure magnesium workpieces is achieved; and compared with the prior art, only water is used as a cleaning medium in the whole process, and toxic and harmful chemical agents are not needed. The environmental pollution risk is greatly reduced, and the environmental protection requirement is met. The environment-friendly polishing solution is adopted for electrochemical polishing, core components of the polishing solution are biodegradable non-toxic reagents such as ethyl alcohol and glycerinum, waste liquid treatment is simple, zero liquid discharge can be achieved, and the difficulty and cost of waste water treatment are remarkably reduced. According to the invention, the process flow is simplified, the consumption of chemicals and pollution emission are reduced, and the process efficiency is improved. According to the invention, whole-process monitoring and automatic operation from pretreatment to post-treatment are realized, the production efficiency and consistency are improved, and the method is suitable for industrial large-scale application.

The invention relates to the field of cleaning, and discloses a post-processing method of a cleaning system.The cleaning system comprises a cleaning machine and a base, the cleaning machine comprises a cleaning part and a front scraping strip, the cleaning part rotationally wipes the ground or conducts self-cleaning, and the front scraping strip is movably arranged on the front side of the cleaning part; the post-processing method of the cleaning system comprises a self-cleaning method, wherein in the self-cleaning process of the cleaning machine, the front scraping strip is controlled to abut against the base at least once. Compared with the prior art, the post-processing method of the cleaning system, provided by the embodiment of the invention, not only can effectively clean the front scraping strip, but also the front scraping strip can block cleaning liquid splashing forwards in the self-cleaning process, and liquid splashing in the cleaning process is reduced.

The invention discloses a high-flux high-pollution-resistance nanofiltration membrane as well as a preparation method and application thereof. The scheme is realized by constructing a gradient separation layer compounded by modified MOF and polyamide on a porous support layer; the preparation method comprises the following steps: preparing a water phase from modified MOF grafted with carboxylate radical and sulfonate ion recognition groups on the surface, a polyamine monomer and an ion channel regulator, carrying out interfacial polymerization on the water phase and an oil phase containing a fluorine-containing acyl chloride monomer on the surface of a porous support membrane, and carrying out heat treatment and metal ion post-treatment, the modified MOF in gradient distribution in the nanofiltration membrane can specifically adsorb Ca < 2 + >, Mg < 2 + > and other scaling ions, and scale formation is inhibited from the source; the composite structure simultaneously realizes high flux and high selectivity; the retention rate of the membrane to Na2SO4 under 0.6 MPa is greater than or equal to 99.2%, the retention rate of the membrane to NaCl is less than or equal to 15%, the flux of pure water is greater than or equal to 20 L.m <-2 >. H <-1 >. Bar <-1 >, and the flux attenuation rate is less than or equal to 16.7% after the membrane runs in high-hardness, high-COD and high-salinity wastewater for 120 hours; the scheme is particularly suitable for zero-discharge pretreatment of high-salinity wastewater such as solid waste percolate with the TDS of 5-30% and chemical engineering.

The invention discloses a tubular continuous flow preparation process and a tubular continuous flow preparation device for (R)-(+)-2-(4-hydroxyphenoxy) propionic acid. A hydroquinone aqueous solution and a sodium hydroxide solution are respectively preheated and mixed, and then enter a tubular reactor I for reaction to obtain a hydroquinone sodium alkaline solution. And pumping (S)-(-)-2-methyl chloropropionate into a reaction system, respectively preheating the (S)-(-)-2-methyl chloropropionate and the hydroquinone sodium alkaline solution obtained in the previous step, mixing the (S)-(-)-2-methyl chloropropionate and the hydroquinone sodium alkaline solution, carrying out nucleophilic substitution reaction in a tubular reactor II, and carrying out post-treatment on the reaction completion solution to obtain the high-purity (R)-(+)-2-(4-hydroxyphenoxy) propionic acid. According to the method, an optimization method combining a tubular reaction technology and kinetic research is adopted, and MATLAB simulation and experimental verification are combined, so that the reaction yield reaches 95% or above, and the purity reaches 99% or above; the method is high in reaction controllability, fully continuous in reaction process, convenient to operate, low in cost and suitable for industrial production, and the use amount of hydroquinone is greatly reduced.

The invention relates to the technical field of environmental remediation, in particular to an in-situ soil perfluorinated compound remediation method and system.The method comprises the following steps that electrochemical targeted enrichment is conducted, applying a pulse type direct-current electric field to the anode and the cathode to drive anionic PFAS in the soil to migrate and enrich towards an anode area; in the anode area, the temperature of anode soil is increased, composite peroxide and a chemical activator are continuously injected, and perfluorinated compounds enriched in the anode are oxidized and degraded; and microbial polishing and ecological restoration: stopping the electric field, carrying out post-treatment on the anode region, adding a microbial agent and a nutritional agent into the anode region, and carrying out biodegradation on residual perfluorinated compounds or degradation intermediate products thereof. Through systematic design of physical field guidance, targeted energy injection, multiple catalytic oxidation and ecological function reconstruction, in-situ soil treatment is achieved, and the core problem in PFAS in-situ remediation is precisely solved.

The invention relates to the technical field of fine chemical engineering, and discloses a fuel cell cooling liquid and a preparation method thereof, and the preparation method comprises the following steps: preparation of a basic liquid, construction of a corrosion inhibition system, ion inhibition treatment, addition of a functional auxiliary agent and post-treatment. According to the composite corrosion inhibitor, zinc ions are anchored to gap sites of a silicate framework through the surface loading effect of sodium silicate and nano-zinc oxide under the shear dispersion condition, a compact composite passivation film is formed on the surface of a metal pipeline, and an electrode potential active area is covered; meanwhile, molybdate ions are subjected to a self-repairing reaction at the defect position of a passivation film preferentially by virtue of the oxidation-reduction characteristic of the molybdate ions, and formation of a galvanic corrosion microbattery is blocked by dynamically filling microcracks, so that the integrity of a corrosion inhibition system is improved; all the components of the composite corrosion inhibitor generate a synergistic effect in a specific proportion, so that the cooling liquid can maintain stable corrosion resistance for a long time.

The invention relates to a reverse osmosis membrane and a membrane assembly, in particular to the technical field of reverse osmosis membranes, and discloses a preparation method of a high-pressure-resistant reverse osmosis membrane, which comprises the following steps: immersing a porous support base membrane in a water phase solution containing 0.8-2.5 wt% of m-phenylenediamine, 0.05-0.1 wt% of carboxylated hyperbranched nanoparticles and 0.03-0.1 wt% of a nonionic surfactant for 90-150s; removing redundant aqueous phase solution, and then transferring into an oil phase n-hexane solution containing 0.05 to 0.5 weight percent of trimesoyl chloride and 0.05 to 0.2 weight percent of aminated MOFs (Metal-Organic Frameworks) to react for 45 to 75 seconds; performing heat treatment at 65 to 75 DEG C for 10 to 15 minutes; 0.5-2.0 wt% of a sodium hydrogen sulfite aqueous solution is adopted for post-treatment and curing to form the film. According to the preparation method, carboxylated hyperbranched nanoparticles are introduced into a water phase, and aminated MOFs are introduced into an oil phase, so that a rigid-flexible coupled nanometer enhanced interface is constructed; meanwhile, post-crosslinking and sodium hydrogen sulfite chemical curing are utilized to form a compact, tough and high-mechanical-strength PA functional layer. After the obtained membrane continuously runs for 48 hours at 150 bar, the membrane returns to 55 bar for testing, and the water flux attenuation amplitude is 1t; the retention rate of NaCl is greater than or equal to 99.5%.

The invention discloses a post-treatment liquid and application thereof in an anode foil formation post-treatment process, and the post-treatment liquid comprises the following components in percentage by mass: 0.1-5% of a main film-forming agent, 0.05-3% of a synergistic stabilizer and the balance of a solvent, the main film-forming agent is selected from at least one of a waterborne polyurethane emulsion and a silane coupling agent; the synergistic stabilizer is selected from at least one of organophosphate, molybdate and tungstate. The main film-forming agent and the synergistic stabilizer are compounded to obtain the post-treatment liquid, on one hand, the synergistic stabilizer is firmly combined with an aluminum oxide substrate to carry out deep passivation treatment on an oxidation film on the surface of the anode foil, and on the other hand, the synergistic stabilizer is subjected to network crosslinking with a hydrophobic protection layer formed by the main film-forming agent; the three-dimensional composite protective film can effectively isolate water molecules, repair microdefects on the surface of an oxidation film, prevent the phenomena of specific volume attenuation, leakage current increase and the like of the anode foil, and improve the long-term working reliability of the capacitor.

The invention relates to the technical field of domestic sewage treatment, in particular to a domestic sewage treatment device capable of performing multi-stage filtration, the domestic sewage treatment device comprises a treatment box, the treatment box is internally provided with a pretreatment unit, a post-treatment box and a post-treatment unit in sequence from left to right; the fixing rod drives the conical seat and the conical block to move towards the flushing conical hole, the using distance between the conical block and the flushing conical hole is adjusted so as to adjust the size of the output hole diameter of the flushing conical hole, the gradually-contracted flow channel can stably accelerate fluid, the local outlet flow speed of the flushing spray head is increased, and the cleaning effect on the filtering disc is improved. According to the invention, a plurality of filtering discs are arranged on the base, and are matched with synchronous speed-reducing rotation of the plurality of filtering discs, so that the cleaning effect of the filtering disc for rough filtration is ensured, the stripping action time of impurities in the filtering disc for fine filtration is prolonged, the drainage flux stability of the filtering disc for fine filtration is obviously ensured, the overall filtering performance of the device is optimized, and the application adaptability of the device is expanded.

The invention relates to a suzertraline intermediate as well as a preparation method and application thereof, and particularly provides a suzertraline intermediate 3, 4-difluoro-2-methoxyphenylacetic acid compound and a preparation method thereof, and the suzertraline intermediate can be used for preparing 3, 4-difluoro-2-methoxyphenylacetic acid. Specifically, 2, 3, 4-trifluoronitrobenzene which is low in price and easy to obtain serves as a starting raw material, 3, 4-difluoro-2-methoxyphenylacetic acid is prepared through a substitution reaction, a methylation reaction, a reduction reaction, a Meerwein arylation reaction and a hydrolysis reaction, the method is mild in reaction condition, a reaction substrate better meets the economic and environment-friendly requirements, reaction operation and a post-treatment process are safe and simple, and the method is suitable for industrial production. The purification steps are simple and convenient, byproducts are few, a target product with high purity can be obtained conveniently, corrosion to equipment is small, special equipment is not needed, and the method is suitable for industrial production.

The invention belongs to the field of synthesis of 4, 6-dihydroxypyrimidine, and discloses a preparation method of 4, 6-dihydroxypyrimidine, which comprises the following steps: S1, adding malonamide, a basic catalyst and an organic solvent into a reaction bottle, and fully stirring to obtain a mixed solution; s2, under the stirring condition, carboxylic ester derivatives are dropwise added into the mixed solution; s3, after the carboxylic ester derivative is dropwise added, carrying out a heat preservation reaction; and S4, carrying out post-treatment on the reaction liquid obtained by the heat preservation reaction to obtain the target product 4, 6-dihydroxypyrimidine. The post-treatment comprises acidification, filtration, washing and drying. The preparation method of 4, 6-dihydroxypyrimidine has the advantages of mild reaction conditions, simple and safe operation, cheap and easily available raw materials, high yield, good product purity and environmental friendliness, and has important practical significance and application value.

The invention discloses a manufacturing method of a partition piece, which comprises the following steps of: 1, selecting proper raw materials for blanking to obtain a blank; secondly, the blank is heated to the forging temperature; 3, pre-forging operation is conducted on the blank to form a pre-forged piece, finish forging operation is conducted on the pre-forged piece to form a finish-forged piece, die preheating is conducted before forging, and lubricating liquid is sprayed; fourthly, the forged final forging is subjected to solution treatment; 5, trimming of the final forging is cut off; 6, aging treatment is carried out; and step 7, carrying out post-treatment. According to the forging method, operation is easy, the manufacturing process is stable and reliable, the blank is subjected to two times of forging including pre-forging and finish forging, filling is complete during forging, the deformation quantity is small, and the forged partition piece is excellent in physical performance.

The invention provides an anti-pollution large-flux reverse osmosis RO membrane as well as a preparation method and application thereof, belongs to the technical field of reverse osmosis membranes, and discloses an anti-pollution large-flux reverse osmosis RO membrane as well as a preparation method and application thereof. The preparation method comprises the following steps: preparing a water phase solution and an oil phase solution, forming a polyamide separation layer through interfacial polymerization, grafting an anti-pollution functional group through post-treatment, and removing an additive complex. The membrane comprises a supporting layer and a polyamide separation layer, the surface of the separation layer is grafted with a specific anti-pollution functional group, and the separation layer has low roughness and a low Zeta potential absolute value. The working principle is based on interfacial polymerization and surface functional modification, and separation, pollution resistance and flux performance are improved by optimizing the structure. During use, water inlet conditions are controlled, and regular chemical cleaning is realized. The membrane balances the separation efficiency, flux and pollution resistance, solves the problems of easy pollution and low flux of the traditional membrane, reduces the operation cost, and improves the water treatment efficiency.

The present application relates to the technical field of anode slime treatment, and discloses a method for removing antimony and tellurium from anode slime by multi-stage pressurization and chlorine-free process, which comprises the following steps: S1, anode slime pretreatment, S2, multi-stage pressurization treatment, S3, separation of antimony and tellurium from the anode slime, S4, preparation of sodium antimonate, S5, tail gas treatment, S6, waste liquid treatment, S7, post-treatment. The method is characterized by the following: one-stage pressurized thiourea transformation is used for deep copper removal, and two-stage pressurized sulfuration is used for chlorine-free antimony and tellurium removal. The process flow does not involve chlorine-containing substances, and the pressurized leaching of alkaline medium does not produce substances with strong corrosivity, thereby reducing the damage to the equipment. In the process of removing antimony and tellurium, the harmful substances generated during the reaction can be treated by waste gas and waste liquid treatment, and the by-products, precipitates, incompletely removed heavy metal ions, trace pollutants and the like in the tail liquid can be removed or converted into harmless substances, so that the tail liquid meets the discharge standard and the environmental pollution caused by the tail liquid discharge is reduced.

The invention provides an aviation high-pressure guide pipe leakage plugging method and equipment based on a cold spraying technology, belongs to the technical field of aviation maintenance, and can perform high-quality plugging on a leakage guide pipe with the diameter larger than 10mm. According to the plugging method, a plugging coating is obtained by adopting a cold spraying technology, the plugging coating is strengthened by adopting a surface strengthening post-treatment technology, and the plugging effect is good. And the plugging quality is tested through static pressure and pulsation impact circulation testing, and finally leakage repairing of the aviation high-pressure guide pipe is completed. The defects of air holes, microcracks and the like caused by hot working technologies such as welding are overcome, the phenomenon of deterioration of the leakage position and the base material in the peripheral area is avoided, and microcrack propagation is effectively restrained. According to the cold spraying plugging equipment disclosed by the invention, integrated operation of coating preparation and spraying strengthening can be realized, the repairing efficiency and quality are improved, the equipment aspect is flexible, and the cold spraying plugging equipment is suitable for outfield in-situ emergency repairing. In addition, the method can be applied to rapid emergency repair of other conduit assemblies, and has extremely high application value.

This invention discloses a method and system for purifying and treating release agents, belonging to the field of release agent purification and treatment. The treatment method is as follows: S1, raw release agent wastewater is introduced into a treatment tank for hydraulic cavitation treatment, while ozone is simultaneously introduced. Floating oil, waste wax, and solid particulate matter in the wastewater float to the surface of the treatment tank and overflow into a scum tank; S2, after cavitation treatment, when there is very little scum on the surface of the treatment tank, the treated liquid in the treatment tank is introduced into a media filter for further filtration. The filtered clean liquid is then transported to a supply tank; S3, when the media packing adsorbs a thick wax layer, the pressure in the filter tank reaches a threshold. Water from the circulating water tank is introduced into the filter tank to backwash the wax layer. The water containing wax after backwashing enters the circulating water tank; S4, when the wax content in the circulating water in the circulating water tank reaches a threshold, a low-temperature steel roller is used to cool the water, causing wax to precipitate onto the steel roller. The wax is scraped off and collected, and the water is reused. This invention uses hydraulic cavitation to break out and remove oil and wax from waste liquid, and further removes residual waste wax from the treated liquid through media filtration, ensuring the cleanliness of the recycled mold release agent liquid.

This invention provides a variable-volume box structure and a sewage treatment device for tidal population changes, belonging to the field of domestic sewage treatment technology. It includes a base frame, a main treatment box component, a telescopic box component, a mid-position drive assembly, a telescopic conversion assembly, a post-treatment module, an influent distribution module, an aeration module, and a dosing module. Utilizing the cooperation between the semi-gear and the conversion slider in the telescopic conversion assembly, the expansion and automatic return of the double-sided telescopic box are controlled by a single power source, eliminating the need for additional locking elements to maintain the position of the telescopic box after expansion. The influent distribution module, in conjunction with an air interface, uses air pressure to automatically return sewage from the expanded chamber to the main treatment chamber, and pre-treats it using a grit chamber. This allows the device to expand as needed, fold for storage during transport, and flexibly adjust its volume according to flow rate during operation, significantly improving the equipment's space utilization, operational stability, and resistance to the impact of tidal population changes.

The present invention provides a composite nanofiltration membrane, its preparation method, and application. The composite nanofiltration membrane comprises a supporting base membrane and an active separation layer supported on the supporting base membrane; the active separation layer comprises an interfacial polymerization product of a polyamine and a polyacyl chloride that has undergone post-treatment modification; the post-treatment modification comprises post-treatment with a mixed solution of an amine-containing solute and a swelling solvent. The composite nanofiltration membrane has a narrow pore size distribution, high hydrophilicity, and a smooth surface with a near-neutral charge. While significantly improving pure water permeation flux, it achieves high separation selectivity for small-molecule organic compounds and exhibits excellent anti-fouling properties and long-term operational stability. The composite nanofiltration membrane can be used for wastewater decolorization, wastewater desalination, resource recovery, or water softening.

The utility model relates to the technical field of cleaning, in particular to a bottom plate cleaning device which improves the efficiency and cleanliness of smelting post-treatment through automatic cleaning. Comprising a shell internally provided with a cavity used for installing parts; the cleaning assembly comprises a brush plate mounted at the bottom of the shell through a mounting part and a first driving mechanism used for driving the mounting part to rotate, and bristles attached to the surface of the bottom plate are arranged at the bottom of the brush plate; the collecting assembly is used for collecting the impurities cleaned by the cleaning assembly; the moving assembly is used for driving the shell to move on the bottom plate; and the controller is in communication connection with the cleaning assembly, the collecting assembly and the moving assembly.

The invention provides a method for purifying and removing lead in a sodium zincate solution, the method for purifying and removing lead in the sodium zincate solution comprises a main reaction step and a post-treatment step, and the method comprises the following steps: heating an alkaline leachate sodium zincate solution to 50-90 DEG C, adding a displacement precipitation agent while stirring, controlling the addition amount of the displacement precipitation agent to be 0.5-3 g / L, reacting for 0.5-2.5 h, and carrying out solid-liquid separation, and filtering to remove the lead precipitate so as to complete the removal of lead in the sodium zincate solution, and the removal rate of lead reaches 99.15% or above. The lead-containing sodium zincate solution is an alkaline leaching solution obtained after NaOH alkaline leaching is carried out on the finely-ground and screened Lanping oxygen-sulfur mixed lead-zinc concentrate, and the replacement precipitant is zinc powder.

The invention discloses a preparation method and a post-treatment preservation method of triphenyl boron (TPB), and the preparation method comprises the following steps: taking raw materials of triisopropyl borate (TiPB), metal sodium, chlorobenzene, isopropanol and benzene, adding the raw materials into a solvent toluene, and carrying out a reaction to obtain a reaction solution; and extracting the reaction solution with deionized water to obtain a triphenylboron-sodium hydroxide aqueous solution, carrying out post-treatment acid regulation and drying to obtain a triphenylboron (TPB) solid, and finally storing the triphenylboron solid in an organic solution such as toluene and the like. Under the preferable condition, the yield reaches 89.8%. The synthesis method disclosed by the invention is simple, and the prepared TPB is used as a Lewis acid and is widely used as a ligand and a (assistant) catalyst.

The utility model discloses a kind of automatic post-treatment equipment of bolt hot galvanizing, belong to metal surface treatment technical field, it includes the mechanical arm for grabbing work, centrifuge and truss manipulator for throwing away excess zinc liquid, the mechanical arm and centrifuge are all located truss manipulator side, the mechanical arm is located centrifuge rear, cooling pool, passivation pool and blanking conveyor are respectively installed below the truss manipulator, and the passivation pool is located cooling pool and blanking conveyor adjacent side, wherein, it further includes zinc plating basket for containing workpiece, the zinc plating basket outer diameter is less than centrifuge inner diameter, in the utility model, adopt mechanical arm, truss manipulator and blanking conveyor and other automation equipment, the seamless docking of bolt hot galvanizing post-treatment process equipment is realized, to effectively improve the automation degree of device whole, to greatly reduce manual operation, greatly avoid the situation of low production efficiency and low capacity caused by manual operation.