34results about How to "Avoid environmental risks" patented technology

The invention belongs to the technical field of high-purity gas preparation and catalysis, and discloses a copper-iron double-component composite catalyst for removing trace acetylene and ethylene in petrochemical byproduct hydrogen chloride gas to prepare electronic grade hydrogen chloride gas, and a preparation method of the copper-iron double-component composite catalyst comprises the following steps: immersing activated carbon in hydrochloric acid; washing the activated carbon carrier with deionized water until the pH is neutral, and drying to obtain the pretreated activated carbon carrier; and impregnating the active component on the pretreated active carbon carrier, carrying out ultrasonic-assisted impregnation, standing, and drying, thereby obtaining the product, the active components are Fe metal salt and Cu metal salt. According to the method, trace acetylene and ethylene in the petrochemical byproduct hydrogen chloride gas are catalyzed to react with the hydrogen chloride gas at the same time, so that acetylene and ethylene are removed at the same time, and the acetylene and ethylene removal step in the existing hydrogen chloride purification process is simplified. Compared with a traditional method, the reaction efficiency of preparing the electronic-grade hydrogen chloride gas is remarkably improved.

An industrial wastewater treatment monitoring method and system based on LSTM, relating to the technical field of industrial wastewater treatment, setting water quality monitoring points in the current industrial wastewater treatment process, obtaining water quality data of each water quality monitoring point; analyzing historical water quality data of each water quality monitoring point in several monitoring cycles to obtain key water quality monitoring indicators; building a water quality prediction model based on a long short-term memory network LSTM, obtaining the estimated numerical time series of key water quality monitoring indicators of each water quality monitoring point in the current monitoring cycle; real-time monitoring of the prediction results of the water quality prediction model, retraining the water quality prediction model according to the prediction results, and performing overall early warning real-time monitoring at the same time, obtaining control item measures for the next monitoring cycle according to the overall early warning real-time monitoring results, and realizing accurate monitoring and early warning of wastewater treatment effects.

This utility model provides a surface modification treatment device for edge banding strips, comprising a chassis and a centrifugal fan, transformer, electrode assembly, lifting drive cylinder, and control box mounted on the chassis. The top of the chassis has a groove with a suction hole at the bottom. The centrifugal fan is connected to an external power source, its inlet is connected to the suction hole, and its outlet is connected to an external environmental emission channel. The transformer is electrically connected to the control box, its power input terminal is connected to an external power source, and its power output terminal is connected to the electrode assembly. The electrode assembly includes an electrode protective cover, a positive electrode assembly installed inside the electrode protective cover, and a negative electrode tube disposed in the groove. The positive electrode assembly is connected to the high-voltage side power output terminal of the transformer; the negative electrode tube is connected to the low-voltage side power output terminal of the transformer. This utility model is safe, convenient, and environmentally friendly to operate, and provides high efficiency and good results in edge banding strip modification treatment, significantly improving the production efficiency and quality of edge banding strips, making it suitable for widespread application.

This invention provides a method for recovering and utilizing distillation residue after solvent removal from homohydric anhydride, relating to the field of fine chemical technology. The method includes anhydride treatment, vaporization and sublimation, dissolution and recrystallization, distillation, and water washing. In this invention, the distillation residue is anhydride-treated under high temperature and negative pressure, followed by vaporization and sublimation under vacuum to separate mechanical impurities and high-boiling substances. Then, through dissolution and recrystallization, the difference in solubility between homohydric anhydride and metahydric anhydride in polar solvents is utilized to preferentially crystallize out the homohydric anhydride. The mother liquor is distilled to remove the solvent, and then colored impurities are removed by hot water washing and activated carbon adsorption. Finally, it is cooled and crystallized to obtain trimellitic acid. The homohydric anhydride obtained by this invention has a purity ≥95% and a yield of 84-89%, and the trimellitic acid has a purity ≥97% and a yield of 81-86%. This method achieves effective recovery of high-value-added components from distillation residue, demonstrating significant economic and environmental benefits and promising application prospects.

The application discloses a kind of multistage synergic covalent grafting type hydrolysis-resistant self-cleaning PET submarine cable monofilament and preparation method, the monofilament includes three parts of core layer, skin layer and surface layer, the core layer is the high viscosity polyethylene terephthalate resin containing carbodiimide anti-hydrolysis agent;Skin layer is the modified PET resin of functional polysiloxane covalent grafting, wherein the functional polysiloxane has epoxy end group or isocyanate end group, and main chain has Si-H group;Surface layer is the fluorine-free low surface energy layer formed by polyvinyl long side chain alkane polysiloxane and residual Si-H group in skin layer through hydrosilylation reaction.The application significantly improves the durability of monofilament in humid heat environment, so that it is suitable for long-term humid heat service environment such as marine cable and industrial fabric, and can maintain stable mechanical strength and self-cleaning performance for a long time.

The invention discloses a cyanide-free alkaline copper bottoming plating solution and a manufacturing method thereof, and relates to the technical field of plating solution production. Comprising the following components in parts by weight: 70-80 parts of deionized water, 8-12 parts of copper sulfate pentahydrate, 32-50 parts of HEDP, 30-60 parts of anhydrous potassium carbonate, 40-60 parts of a potassium hydroxide solution, 0.5-2 parts of a leveling agent, 0.5-1.5 parts of a modified preservative and 0.3-1.5 parts of a brightener. According to the cyanide-free formula, the environment-friendly requirement is met, the pollution to the environment is reduced, the environmental risk caused by using highly toxic cyanide is avoided, and the environment-friendly effect is achieved. Meanwhile, wastewater treatment difficulty and cost are reduced, sustainable production is facilitated, the modified preservative effectively inhibits growth of mould, the plating solution is prevented from mildewing and going bad, and the service cycle of the plating solution is prolonged. According to the special preparation method, all the components have a synergistic effect, the coating binding force is not affected while corrosion prevention is achieved, stable coating quality is guaranteed, and production continuity and stability are guaranteed.

The application discloses a heat pump all-in-one machine and system convenient to disassemble and assemble, relates to the technical field of heat pump hot water equipment, and comprises a whole machine frame, a water storage tank, a main machine frame which is detachably connected with the whole machine frame, and a heat pump main machine which is installed in the main machine frame. The application sets the detachable main machine frame in the whole machine frame, integrally installs the complete heat pump main machine (containing a compressor, a heat exchanger and all heat conversion components such as related pipelines) on the main machine frame, and makes the heat pump main machine and the water storage tank form a module which is relatively independent in space and structure. When the equipment needs to be overhauled, maintained or replaced, the main machine frame can be integrally drawn out together with the heat pump main machine, so that the disassembly and assembly difficulty is remarkably reduced; meanwhile, the heat pump main machine pipeline has completed pre-assembly and sealing inside the main machine frame, is connected with the water storage tank only through a small amount of water pipe interfaces, can keep the refrigerant circuit intact after being disconnected, and avoids energy efficiency loss and environmental protection risks caused by on-site discharge and re-charging of refrigerant.

The utility model provides a full -automatic cotton seed sulfuric acid de -cotton acid -matching device, include: raw material storage unit, mixed dilution unit, finished product standby unit and waste acid treatment unit. The utility model provides a full -automatic cotton seed sulfuric acid de -cotton acid -matching device, through raw material temporary storage measures the conveying mixes dilution finished product standby waste acid treatment five big links cooperation, the core is through accurate control material proportion and mixing process, realizes safe, efficient concentrated sulfuric acid dilution, and this system whole presents concentrated sulfuric acid from storage, measurement, dilution to finished product conveying and waste acid treatment closed -loop process, the core lies in accurate proportioning, safe mixing, environmental protection treatment, through PLC or DCS control system linkage pump, valve and instrument, can realize automatic operation, ensure the dual goal of production efficiency and safety environmental protection, the actual operation emphatically controls dilution temperature, material flow and waste acid index, avoids safety accident and environmental risk.

This invention relates to a method and system for precise ammonia injection control in a circulating fluidized bed boiler, comprising the following steps: S1, acquiring the flue gas temperature, flue gas velocity, and NOx concentration at each measuring point at the cyclone outlet, and calculating the average NOx concentration, average flue gas velocity, and average flue gas temperature; S2, based on the calculation results of S1, calculating the total amount of ammonia injected as a reducing agent, forming pre-feedback, and adjusting the total amount of reducing agent passing through the ammonia injection main valve; S3, acquiring the NOx concentration, flue gas temperature, and flue gas velocity at each spray gun, calculating the reducing agent dosage at each measuring point, forming post-feedback, and adjusting the reducing agent dosage passing through the ammonia injection branch valve on the branch where the spray gun is located at each measuring point; this method, by measuring the flue gas temperature, flue gas velocity, and NOx concentration at each measuring point at the cyclone outlet and at each spray gun, calculates the total amount of ammonia injected as a reducing agent and the amount of reducing agent used in each branch in real time, thereby adjusting the reducing agent dosage of the ammonia injection main valve and the ammonia injection branch valves of each branch, and achieving precise ammonia injection adjustment in real time.

The application relates to the technical field of sodium hypochlorite production and preparation, and particularly discloses a device for continuously preparing high-purity sodium hypochlorite, which comprises a first reaction kettle, a first water inlet pipe is connected with a water inlet of the first reaction kettle, and a first conveying pump is arranged on the first water inlet pipe; a first back pressure valve is arranged on the first water inlet pipe between the first conveying pump and the first reaction kettle; a first jacketed heat exchanger is sleeved on the outer circumferential surface of the first reaction kettle, a first jacketed heat exchanger inlet and a first jacketed heat exchanger outlet are arranged on the first jacketed heat exchanger, the first jacketed heat exchanger inlet is connected with a drain outlet of the first reaction kettle through a pipeline, the first jacketed heat exchanger inlet is connected with cooling water through a pipeline, and a second back pressure valve is arranged on the pipeline between the cooling water and the first jacketed heat exchanger inlet. The application has the characteristics of being capable of reducing by-products, improving the effective content and reducing the waste of raw material chlorine.

The application provides a mixed refrigerant, a preparation method and application thereof. The working temperature of the mixed refrigerant comprises-60 DEG C to-45 DEG C; the mixed refrigerant is composed of a first component, a second component and a third component; the first component is CO2; the second component is difluoromethane; and the third component is one of 1,1-difluoroethane, trans-1,3,3,3-tetrafluoropropene, cis-1,3,3,3-tetrafluoropropene or trans-1-chloro-3,3,3-trifluoropropene. The mixed refrigerant of the application improves environmental protection and safety while keeping the system stable, and the overall performance is better than that of difluoromethane, so that the environmental protection and safety are improved; meanwhile, the refrigerant has good evaporation characteristics at low temperature (-45 DEG C), so that the self-recovery heat pump system loaded with the mixed refrigerant is suitable for hot water supply under extremely low temperature working conditions.

The invention discloses a method for preparing sodium fluoride by recycling overhaul slag, and belongs to the technical field of dangerous solid waste recycling. The method for preparing the sodium fluoride by recycling the overhaul slag comprises the following steps: (1) crushing the overhaul slag, grinding and roasting the overhaul slag and calcium carbonate, then leaching by using a first leaching solution, and carrying out suction filtration to obtain a first filtrate and a first filter residue; (2) leaching the first filter residue with a second leachate, carrying out suction filtration, and taking a second filter residue; (3) leaching the second filter residue with a third leachate, and carrying out suction filtration to obtain a second filtrate; (4) combining the first filtrate and the second filtrate, and adding an impurity removal agent to remove impurities, so as to obtain a purified sodium fluoride solution; (5) concentrating the purified sodium fluoride solution, and inducing crystallization to obtain a sodium fluoride crude product; (6) purifying the sodium fluoride crude product with hot pure water to obtain purified sodium fluoride crystals; and (7) drying the purified sodium fluoride crystal to obtain sodium fluoride.

The invention provides an electric power equipment intelligent green recovery method and system based on material attribute characteristics, and the method comprises the steps: carrying out the preprocessing of the attribute characteristics of to-be-recovered electric power equipment, so as to correct the distortion characteristics under the environment interference, and complement the characteristic parameters of the lack of novel materials; distributing a dynamic weight for each attribute index in the attribute index system through a dynamic weight distribution algorithm, and calculating a comprehensive score of the power equipment through a weighted summation calculation mode; determining an initial recommendation recovery scheme according to the comprehensive score; and calculating a green recovery index of the power equipment, evaluating whether the power equipment meets a green recovery requirement through the green recovery index, and adjusting the initial recommended recovery scheme according to an evaluation result. According to the method, accurate classification of high-difficulty recovery materials and adaptive recovery scheme recommendation are realized through multi-stage operation processing of attribute feature preprocessing, feature weighted fusion and green evaluation.

The invention discloses an oil sludge pyrolysis catalyst and a preparation method thereof, and belongs to the technical field of oily sludge treatment. The preparation method comprises the following steps: (1) pretreating coal coke to obtain modified coal coke; the pretreatment comprises the following steps: firstly, treating the coal coke by using organic acid, and then treating the coal coke treated by the organic acid by using alkali liquor; and (2) mixing the modified coal coke with ferric salt, and then sequentially carrying out solid-liquid separation, drying, calcining and reduction treatment to obtain the oil sludge pyrolysis catalyst. The coal coke is modified in an acid-base sequence, pore channels are opened and functional groups are increased through organic acid treatment, the pore channels are widened and heavy metal impurities are removed through alkali treatment, and the pore structure of the carrier is synergistically improved; then an iron active component is loaded, and the catalytic activity is improved through calcination and hydrogen reduction activation. When the prepared catalyst is used for oil sludge pyrolysis, the oil recovery rate can reach 94% or above, the preparation process is environmentally friendly, and resource utilization of oil sludge is achieved.

The invention discloses a zero-increment online recovery method for alkaline etching waste liquid, which belongs to the technical field of circuit board alkaline etching waste liquid treatment. The method of the invention realizes zero increment of alkaline etching waste liquid, fully recovers copper resources and ammonia nitrogen resources, and the recovered product has high added value and obvious economic benefits. The present invention adopts a multi-stage fully enclosed absorption of ammonia by a combined process of low-temperature evaporation and ammonia absorption tower to ensure that ammonia is fully reused without raw material loss. The evaporation temperature of the present invention is 50-60°C, which can be completely obtained by using waste heat inside the factory. It is a low-grade heat source, which can realize the cascade utilization of energy relative to ordinary steam evaporation, and achieves the purpose of energy saving. The present invention realizes zero generation of hazardous waste of alkaline etching waste liquid, avoids the environmental risks of hazardous waste transportation process, and has obvious environmental benefits.

The invention relates to the technical field of BHET recycling, and discloses a method for preparing antimony-free cation dyeable polyester fibers by adopting recycled BHET, and the method comprises the following steps: S1, adding a titanium catalyst and titanium dioxide ethylene glycol mixed slurry into the recycled BHET, and carrying out pre-polycondensation reaction to prepare a mixture I; s2, adding a branched chain agent, a stabilizer and sulfonate into the other part of recovered BHET, and carrying out pre-polycondensation reaction to prepare a mixture II; and S3, mixing the mixture I and the mixture II, carrying out two-stage polycondensation reaction, and carrying out melt spinning to obtain the polyester fiber. Through combination of a parallel pre-polycondensation production process and an antimony-free catalytic system, the problem of polymerization instability caused by purity fluctuation of recovered BHET and impurity residues is solved, efficient compatibility of recovered raw materials and a CDP functional system is realized, and the industrialization process of regenerated extinction CDP is promoted.

The invention relates to the technical field of auxiliary materials for optical cables, and discloses green and environment-friendly optical cable filling paste for optical cables and a preparation method of the green and environment-friendly optical cable filling paste. The filling paste is prepared by compounding plant base oil compounded by flaxseed oil and castor oil as base oil with environment-friendly components such as modified organic bentonite, environment-friendly polyolefin wax and modified nano silicon dioxide according to a specific proportion; the preparation method comprises the steps of organic bentonite modification, base oil pretreatment, segmented temperature control premixing, functional component reaction, homogeneous degassing post-treatment and the like. The filling paste disclosed by the invention is environment-friendly, non-toxic and high in biodegradation rate, and has excellent water resistance, moisture resistance, stability and thixotropy; the preparation process adapts to the characteristics of plant-based raw materials, can ensure that all the components are fully fused, improves the comprehensive performance of the filling paste, is simple and easy to industrialize, solves the problems of poor environmental protection property and insufficient stability of the existing optical cable filling paste, and has important popularization and application values.

The invention relates to the technical field of hazardous waste water treatment, in particular to a treatment system and method for medical hazardous waste incineration fly ash landfill leachate. The treatment system for the medical hazardous waste incineration fly ash landfill leachate comprises an integrated softening microfiltration unit, an anti-pollution high-recovery-rate membrane concentration unit, a submerged combustion evaporative crystallization unit based on an in-plant combustible gas source and an in-plant material co-treatment unit which are connected in sequence. The method comprises the following steps: synchronously removing hardness and heavy metals through intelligent dosing softening and microfiltration; a two-stage DTRO membrane is used for realizing deep desalination of the high-salinity wastewater and enrichment of pollutants; carrying out efficient evaporation and crystallization on the concentrated solution by adopting an immersion combustion evaporation technology; and finally, generated sludge, crystalline salt and residues are returned to the incinerator for co-treatment, and condensate water is recycled. Aiming at the characteristics of high salinity, high hardness, high toxicity and low biodegradability of the percolate, the invention provides a set of complete near-zero emission solution, and efficient removal and recycling of pollutants are realized.

The invention provides an on-site rapid detection method for heavy metal lead ions and / or cadmium in seawater through an in-situ bismuth plating method. The technical problems that in the prior art, operation is complex, and the method is not suitable for on-site application are solved. The method comprises the following steps: S1, assembling a three-electrode system sensor, and connecting an electrochemical workstation; s2, preparing a simulated seawater solution containing bismuth ions; s3, lead and cadmium ion standard solutions are added into the simulated seawater solution, and the optimal deposition voltage and deposition time are obtained through electrochemical testing; s4, dividing the simulated seawater solution into a plurality of parts, respectively adding lead ion and / or cadmium ion standard solutions with different concentrations, and detecting and drawing a standard working curve by adopting square wave anodic stripping voltammetry; and S5, carrying out suction filtration treatment on the seawater to be detected, adding the lead ion and / or cadmium ion standard solution, the bismuth ion solution, NaAc and HAc, preparing a weakly acidic water sample to be detected, carrying out electrochemical detection, comparing with the standard working curve, and calculating to obtain the content of lead ions and / or cadmium ions in the seawater to be detected. The method can be widely applied to the environment monitoring technology field.

The embodiment of the present application relates to the technical field of soil remediation, in particular to a soil remediation system based on desulfurization gypsum and microorganisms, comprising: a desulfurization gypsum treatment assembly, which is used for preparing desulfurization gypsum powder and desulfurization gypsum slurry by taking desulfurization gypsum generated by a coal-fired power plant as raw material; a mineralization bacteria preparation assembly, which is used for obtaining desulfurization gypsum source functional mineralization bacteria liquid by taking desulfurization gypsum powder as an initial bacteria source; a soil plowing assembly, which is used for plowing the soil to be remediated after a spraying assembly applies desulfurization gypsum slurry to the soil to be remediated, so that the soil to be remediated is uniformly mixed with the desulfurization gypsum slurry to obtain pre-improved soil; and the pre-improved soil to which a remediation reaction liquid is applied is plowed to precipitate target heavy metal ions in the pre-improved soil. The technical scheme of the present application can improve the remediation effect of saline-alkali and heavy metal contaminated soil, and avoid the environmental risk caused by the storage of desulfurization gypsum.

The embodiment of the invention relates to the technical field of soil remediation, in particular to a soil remediation method based on synergy of desulfurized gypsum and microorganisms, which comprises the following steps: respectively preparing desulfurized gypsum powder and desulfurized gypsum slurry by taking desulfurized gypsum generated by a coal-fired power plant as a raw material; the method comprises the following steps: inoculating desulfurized gypsum powder as an initial bacterium source into an enrichment culture medium for enrichment culture and passage domestication to obtain a desulfurized gypsum source functional mineralized bacterium solution, and taking urea as a nitrogen source in the enrichment culture medium; applying the desulfurized gypsum slurry to soil to be remediated, uniformly mixing, and standing for a preset time period to obtain pre-improved soil; and mixing the desulfurized gypsum source functional mineralized bacteria solution with a urea solution to obtain a remediation reaction solution, and applying the remediation reaction solution to the pre-improved soil to precipitate target heavy metal ions in the pre-improved soil so as to realize remediation of the pre-improved soil. According to the technical scheme, the remediation effect of the salinized and heavy metal contaminated soil can be improved, and the environmental risk caused by stockpiling of desulfurized gypsum is avoided.

The application belongs to the technical field of high polymer materials, and discloses a fluorine-free high and low temperature resistant organic silicon modified polyurethane elastomer as well as a preparation method and application thereof. The elastomer is prepared from an organic silicon modified polyurethane base and a peroxide compound solution, the mass of the peroxide compound solution is 1-5% of the mass of the organic silicon modified polyurethane base; the preparation raw materials of the organic silicon modified polyurethane base include 4,4'-dicyclohexyl methane diisocyanate, hydroxyl-terminated polybutadiene, monohydroxy polydimethylsiloxane, N1-(3-aminopropyl)-N1-dodecylpropane-1,3-diamine and 3-glycidyl ether oxypropyl triethoxysilane; the peroxide compound solution is prepared by dissolving benzoyl peroxide and dicumyl peroxide with a mass ratio of 1:0.5-1:2 in an organic solvent, stirring at room temperature until completely dissolved, and then preparing a homogeneous peroxide solution with a mass fraction of 5-20%.

The utility model discloses a kind of methanol washing device waste heat recovery systems, including methanol water washing tower, separation tower cooler, separation column reflux tank, first reboiler, hot regenerator, hot regenerator cooler, hot regenerator column reflux tank, second reboiler, heat exchanger and water washing tower;The top outlet of methanol water washing tower is also communicated with the liquid inlet of hot regenerator by pipeline;The gas phase outlet of hot regenerator column reflux tank is communicated with the heat medium inlet of heat exchanger by pipeline, the heat medium outlet of heat exchanger is communicated with the bottom air inlet of water washing tower by pipeline, and the top exhaust port of water washing tower is communicated with the air inlet of flare by pipeline.The advantage is that: the efficient compact waste heat recovery system proposed in the utility model, by optimizing heat medium circulation, realize the step-by-step utilization of low-temperature heat energy, finally reduce steam consumption, provide key technical support for industry green low-carbon transformation.

The present application relates to the technical field of waste lithium battery recycling, and discloses a method for preparing high-purity black powder from waste lithium batteries through low-temperature disassembly and a waste gas treatment process, wherein aluminum, organic matter and black powder are separated through step-by-step treatment to obtain high-purity battery black powder; fluorine and phosphorus are preferentially removed at low temperature, strong alkali is not used to avoid the competitive reaction of hydroxyl ions with carbonates and carbon dioxide, and subsequent equipment corrosion is prevented. First-stage water washing simultaneously realizes water-soluble organic matter absorption, phosphorus pentafluoride decomposition, phosphoric acid absorption and pH reduction to inhibit hydrogen fluoride absorption, and no aluminum ions are generated to form aluminum phosphate precipitates, so that a packed tower can be used; second-stage aluminum salt solution absorbs hydrogen fluoride under acidic conditions to form a dissolved fluorine-aluminum complex, which is not affected by carbon dioxide, and a packed tower can be used. The fluorine-aluminum complex solution can be processed into cryolite to realize fluorine resource recycling and avoid environmental risks.

The invention relates to a system for detecting the dissolution condition of metal powder. The system comprises (1) a reaction kettle; (2) a stirrer; (3) a sound wave transmitter; (4) a sound wave detector; (5) a sound wave recorder; the sound wave detector is connected with the reaction kettle through a sound wave transmission line and is used for detecting the frequency of sound waves in the reaction kettle, detected signals are recorded in the sound wave recorder, and the sound wave filtering classification detection system is used for comparing the signals of the blank control sample to detect the frequency of the sound waves in the reaction kettle. And filtering to obtain the real-time online sound wave frequency of the metal powder dissolution condition. The detection system can detect the dissolving condition of the powder particles in the reaction kettle in the closed space under the closed condition, so that the production efficiency is improved, the safety and environmental protection risks caused by manual operation and visual inspection for checking the internal condition are avoided, and the detection system has a good industrial application prospect.

The invention discloses a zinc-based flow battery electrolyte and application thereof, and belongs to the technical field of electrochemical energy storage. The electrolyte is an aqueous solution containing a zinc salt and an additive, and the additive comprises a calcium salt and a magnesium salt; the additive also comprises one or more of lithium salt, sodium salt and strontium salt. Wherein Ca < 2 + > and Mg < 2 + > can strongly interact with water molecules, and a hydrogen bond network in the electrolyte is effectively weakened, so that the freezing point is remarkably reduced; and a small amount of other added metal cations generate a synergistic effect with Ca < 2 + > and Mg < 2 + >, so that the electrolyte still keeps excellent electrochemical properties such as high ionic conductivity and the like while obtaining an ultra-low freezing point. On the basis, the electrolyte successfully realizes stable circulation of the zinc-iodine flow battery in an extremely low-temperature environment. The electrolyte is low in cost, safe and environment-friendly, and a reliable technical scheme is provided for widening the application scene of the zinc-based flow battery to the extreme low-temperature field.

The application provides a methanol control method for a marine methanol engine. The method predicts the risk of methanol leakage by analyzing the methanol escape route and gives a prediction control scheme to solve the leakage safety problem of the methanol engine in the actual working process, ensure the stable and reliable work of the methanol engine at the best, and improve the thermal efficiency. The method comprises the following steps: obtaining engine state information, methanol injection amount change trend state, engine speed difference information and engine torque difference information; comprehensively determining the engine state information, the methanol injection amount change trend state, the engine speed difference information and the engine torque difference information, and outputting the engine methanol supply state; the engine methanol supply state comprises methanol no escape, methanol imminent escape and methanol serious escape; and the methanol injection amount is subjected to feedforward control according to the engine methanol supply state.

The application discloses a kind of nanometer spray plating process of motorcycle hub, comprising the following steps: S1 substrate pretreatment: to aluminum alloy motorcycle hub is sequentially carried out oil removal cleaning, mechanical polishing, phosphating, remove surface dirt, oxide layer and impurities, obtain clean pretreatment hub;S2 primer spraying and solidification: on the surface of pretreatment hub, spray epoxy modified acrylic primer, control primer dry film thickness is 15-30 μm, after spraying, solidification treatment is carried out, obtain primer solidification hub;S3 sensitization and activation treatment: to primer solidification hub is sequentially carried out sensitization treatment, activation treatment, after treatment, using ultrapure water flush clean, obtain activated hub;S4 nanometer mirror surface spray plating: using double-end spray gun, A agent metal salt solution and B agent reducing agent solution are synchronously sprayed, A agent metal salt solution and B agent reducing agent solution are mixed at 15-25 cm from the surface of hub, and metal crystal layer is deposited on the surface of hub.

This invention discloses a method for activating persulfate to degrade organic pollutants using an iron / smarium co-modified porous nitrogen-doped carbon Fenton catalyst. The method uses the iron / smarium co-modified porous nitrogen-doped carbon Fenton catalyst as an activator to activate persulfate and degrade organic pollutants. The iron / smarium co-modified porous nitrogen-doped carbon Fenton catalyst comprises a porous nitrogen-doped carbon framework, with iron and samarium elements modified internally and on its surface. Iron and samarium elements coexist in the form of single-atom sites, diatomic sites, atomic clusters, and nanoparticles. The iron / smarium co-modified porous nitrogen-doped carbon Fenton catalyst used in this invention has the characteristics of high reactivity, wide applicability, and strong anti-interference ability. It is a catalyst with excellent Fenton-like catalytic performance and can be widely used to treat organic pollutants in water bodies. It can quickly and thoroughly remove organic pollutants, has high application value, and good application prospects.