441 results about "Electrolytic process" patented technology

The invention relates to the technical field of electrolytic refining, and provides an electrochemical device and method for extracting metal from molten salt. The electrochemical device comprises an anode, a cathode, an insulating container, an electrolytic bath and an ultrasonic stirring device. The cathode comprises a conductive part and liquid metal; the insulating container is provided with a containing space, the top side of the containing space is open, the liquid metal is contained in the containing space, and a part of the conductive part is inserted into the liquid metal; the electrolytic bath is provided with a containing cavity used for containing molten salt, the insulating container can be used for being immersed in the molten salt so that liquid metal can make contact with the molten salt, and one part of the anode is used for being inserted into the molten salt; a portion of the ultrasonic stirring device is inserted into the liquid metal for oscillating the liquid metal. The liquid metal is subjected to ultrasonic oscillation in the electrolysis process, so that the possibility that metal dendrites are formed on a reduction product or a high-melting-point alloy layer is formed on the surface of the liquid metal is effectively reduced, the reaction efficiency of electrolytic extraction is improved, and the quality of the extracted reduction product is improved.

The invention relates to the technical field of metal smelting, and provides an electrolytic refining device which comprises an anode assembly, a cathode assembly and an electrolytic bath, the cathode assembly comprises a cathode structure, the cathode structure comprises an ultrasonic transducer and a cathode head, the cathode head is connected with the ultrasonic transducer, and the ultrasonic transducer converts ultrasonic electric signals into mechanical vibration; the electrolytic bath is used for containing electrolyte, and at least part of the anode assembly and at least part of the cathode head are arranged in the electrolytic bath. The ultrasonic transducer drives the cathode head to vibrate, so that dendritic crystals gathered on the surface of the cathode head fall off, dendritic crystal accumulation on the surface of the cathode head is reduced, the surface of the cathode head keeps active, the service life of the cathode structure is prolonged, the electrolytic refining reaction rate and stability are improved, the electrolytic refining reaction can be continuously and uniformly carried out, and energy consumption in the electrolytic process is reduced. The maintenance cost and the production downtime are reduced, and the current efficiency and the collection rate of target metal are improved.

The invention relates to the technical field of water electrolysis hydrogen production, in particular to a water electrolysis hydrogen production optimization method and system based on big data analysis, and the method comprises the following steps: S1, data collection: collecting operation data in a water electrolysis hydrogen production process in real time through a sensor; s2, data preprocessing and feature extraction: extracting features related to electrolytic efficiency and electrode life; s3, bubble management based on self-adaptive sound wave control: dynamically adjusting the frequency and intensity of sound waves by using a self-adaptive sound wave control algorithm, and optimizing the distribution and discharge path of bubbles on the surface of the electrode; and S4, fatigue prediction and optimization of the electrode material: analyzing the performance change of the electrode material in real time, predicting the fatigue life of the electrode, and automatically adjusting electrolysis operation parameters or intelligently scheduling replacement operation of the electrode according to a prediction result. According to the invention, the stability of the electrolysis process is ensured, and the problem of performance reduction caused by bubble accumulation is avoided.

The invention belongs to the technical field of high-purity metal preparation, and particularly discloses a method for preparing 5N-grade ultrapure iron. The method is characterized by comprising the following steps: electrolyzing industrial pure iron to prepare liquid; carrying out ion exchange treatment on the solution to reduce near-iron elements such as Co, Ni, Cu and Zn and impurities in the solution, so that ferrous ions are effectively enriched; then, the solution with the near iron element removed serves as electrolyte for electrolysis to prepare pure iron; in the electrolysis process, a ruthenium-coated titanium plate is used as an anode, and a pure titanium plate is used as a cathode; performing high-temperature vacuum annealing treatment and high-temperature atmosphere reduction on a product obtained by electrolysis to remove free-state and combined-state hydrogen and oxygen elements in the product; the 5N-grade ultrapure iron is prepared by matching the steps with a corresponding process. The method has the advantages that the removal of near-iron elements and gas elements is realized by combining solution purification, electrolysis, vacuum annealing and reduction from enrichment and purification of ferrous ions, and the purpose of preparing 5N-grade ultrapure iron through electrolysis is realized.

The invention relates to the technical field of model construction, in particular to a construction method and system of an electrolysis energy consumption model and a storage medium. The method comprises the following steps: collecting electrolysis process parameters by using a multi-mode sensor system, wherein the electrolysis process parameters comprise a current value, a voltage value, an electrolyte temperature and electrolysis time; constructing an electrolysis energy consumption initial model based on the electrolysis process parameters, and inputting the electrolysis process parameters into the electrolysis energy consumption initial model to output a unit product energy consumption value and a current-voltage efficiency curve; electrolytic bubble acoustic monitoring is conducted on the side wall of the electrolytic cell to obtain bubble breakage acoustic wave signals; and analyzing the sound intensity and the rupture frequency of the bubble rupture sound wave signal. According to the method, through the multi-modal sensor, multi-dimensional signal analysis and dynamic parameter correction, the defects of single data and static state of a traditional electrolysis energy consumption model are broken through, and high-precision dynamic modeling and optimization of energy consumption in the electrolysis process are achieved.

The invention relates to a water electrolysis hydrogen production technology, and aims to provide a super-hydrophilic nickel-based electrode with a two-stage array structure and a preparation method of the super-hydrophilic nickel-based electrode. According to the nickel-based electrode, a three-dimensional net-shaped nickel felt made of micron-sized pure nickel fibers serves as a base material, and micron-sized second-stage array structures are periodically arranged on the first-stage surface of the nickel felt; the secondary array structure is any one or two of a ridge-shaped array or a square column array formed on the surface of the nickel felt by using a femtosecond laser etching process. The preparation method of the electrode is simple in preparation step, has super-hydrophilic and super-aerophobic characteristics, is excellent in electrochemical performance and low in cost, and is very suitable for industrial production and application; a femtosecond laser one-step method is used for processing, subsequent treatment is not needed, and the method is simple, easy to operate and suitable for being amplified to an industrial production scale; the surface wettability of the electrode is greatly enhanced, the hydrophilic and aerophobic properties are excellent, and water transmission and bubble desorption in the electrolysis process are facilitated.

The invention belongs to the technical field of pressure type water electrolysis hydrogen production, and particularly relates to a concave-convex flange type high-pressure water electrolysis hydrogen production electrode frame and an electrolysis unit.The concave-convex flange type high-pressure water electrolysis hydrogen production electrode frame comprises an electrode frame body and a bipolar plate, the bipolar plate and the electrode frame body are integrally formed in an injection molding mode, and a first boss is arranged on the outer edge of the front face of the electrode frame body; the electrolysis unit comprises two end pole plates and a plurality of concave-convex flange type high-pressure water electrolysis hydrogen production electrode frames, and each concave-convex flange type high-pressure water electrolysis hydrogen production electrode frame is located between the two end pole plates and is aligned and stacked together in the axial direction. The bipolar plate and the electrode frame are formed into an integrated structure through an injection molding process, and the bipolar plate is accurately embedded in the electrode frame in the injection molding process, so that the overall structural strength of the electrolysis unit is improved, and gas or liquid leakage possibly generated in the electrolysis process is effectively prevented; therefore, safe and efficient electrolytic reaction is ensured.

The invention relates to a method for producing an alkali metal alcoholate solution L1 in an electrolysis cell E which comprises at least one cathode chamber KK, at least one anode chamber KA, and at least one central chamber KM lying therebetween. The interior IKK of the cathode chamber KK is separated from the interior IKM of the central chamber KM by a separating wall W comprising at least one alkali-cation-conductive solid ceramic electrolyte (=“AFK”) F (e.g. NaSICON). F has the surface OF. A part OA / MK of the surface OF directly contacts the interior IKM, and a part OKK of the surface OF directly contacts the interior IKK. The surface OA / MK and / or the surface OKK comprises at least one part of a surface OFΔ. OFΔ is produced from a pre-treatment step in which F is produced from an AFK F′ comprising the surface OF′. In the pre-treatment step, AFK is removed from F′ by sputtering the surface OF′ using noble gas cations N+, and the AFK F with the surface OF comprising the surface OFΔ formed by the sputtering process is obtained. During the electrolysis process for producing the alkali metal alcoholates with F instead of F′, an improved conductivity is provided, whereby for a constant current density, a lower voltage can be used.

The utility model provides a transparent electrolytic bath with a replaceable polar plate. The transparent electrolytic bath comprises a cathode polar plate, a diaphragm and an anode polar plate, and the cathode plate and the anode plate are transparent plates. The visible electrolytic tank is reasonable in structural design, the electrolytic tank is visible by designing the transparent polar plate, real-time monitoring and observation can be carried out in the electrolytic process, changes in the electrolytic process can be directly observed, the mechanism of the electrolytic process can be researched and understood, and the electrolytic efficiency and the product quality are improved. Meanwhile, on the premise of visualization, the combined electrolytic cell is reasonably arranged, disassembled, assembled and replaced, and it can be ensured that gas or sediment generated in the electrolysis process cannot affect transparency.

The invention discloses an electrode material for electrocatalytic degradation of organic wastewater containing high-concentration nitrate and application of the electrode material, a copper salt precursor solution and a tin salt precursor solution are sequentially attached to the surface of a Ti plate, so that a Ti / Cu-Sn multi-metal coating electrode material is obtained, the Ti / Cu-Sn multi-metal coating electrode material is used as a cathode, a metal electrode is used as an anode to construct an electrolytic tank, and the high-concentration nitrate-containing organic wastewater is obtained. The catalyst is used for simultaneous degradation of NO3 <-> and COD in organic wastewater containing high-concentration nitrate and co-production of hydrogen. The electrode material is simple in preparation process, low in cost and high in catalytic activity and stability, nitrate and organic matter in wastewater can be safely, mildly and simultaneously removed in the electrolysis process of the electrode material, and secondary pollution byproducts such as ammonia nitrogen and nitrite are hardly generated. Tests show that the removal rate of nitrate radicals can reach 99.72%, the removal rate of COD (Chemical Oxygen Demand) can reach 84.61% and the selectivity of nitrogen can reach 99.83% when the method is used for treatment.

The invention belongs to the technical field of copper electrolytic refining, and particularly relates to an electrolyte for preparing high-purity copper through electrolytic refining of a high-silver copper plate and a preparation method. The electrolyte for preparing the high-purity copper through electrolytic refining of the high-silver copper plate comprises an electrolytic mother solution and an additive, the electrolytic mother solution comprises CuSO4 and H2SO4, the additive is amino-functionalized imidazole ionic liquid, the amino-functionalized imidazole ionic liquid is 1-aminoalkyl-3-methylimidazole halide salt, and the electrolyte is prepared from an electrolyte solution and a solvent. And the mass concentration of the additive in the electrolyte is 0.01-0.08 g / L. According to the method, a specific type of ionic liquid additive is added into the electrolysis mother liquor, so that the flocculation effect on fine suspended anode mud generated in the electrolysis process can be achieved, the ionic liquid additive can react with Ag < + > to generate precipitates, then the content of Ag and other impurities in cathode copper is reduced, the purity of the cathode copper is greatly improved, and the surface quality of the cathode copper is improved.

The invention belongs to the technical field of light metal smelting and nano materials, and particularly discloses a nano aluminum powder electrolysis preparation method based on ionic liquid. The method comprises the following steps: mixing an ionic liquid, an additive and AlCl3 to obtain an electrolyte, and carrying out an electrolytic reaction by taking aluminum as a cathode and an inert electrode as an anode to prepare nano aluminum powder; the additive is specifically halide salt. The halide salt is added as an additive and can partially replace ionic liquid, so that the preparation cost of the nano aluminum powder is reduced; in addition, the halide salt can also avoid the phenomenon that the aluminum powder is adhered to the cathode, so that the particle size of the obtained nano aluminum powder becomes smaller and is more uniform, the nano aluminum powder with narrower particle size distribution is obtained, and the related performance during application is improved. The preparation method disclosed by the invention also has the advantages of low electrolysis temperature and low energy consumption, and the reaction can be protected by adopting a protective atmosphere in the electrolysis process, so that the preparation safety of the aluminum powder is greatly improved.

The invention discloses a rare earth metal electrolysis system and an electrolysis furnace thereof, and relates to the technical field of metallurgy, the rare earth metal electrolysis system is characterized by comprising a potential data acquisition and preprocessing module, a dendritic crystal feature extraction and quantification module, a dendritic crystal identification and intelligent determination module and an inverse pulse control and dynamic regulation module, in the electrolysis process, potential distribution original data of the surface of a rare earth metal cathode are detected and collected in real time, the obtained original data are preprocessed, and a preprocessed potential data set is established based on a time sequence. According to the method, intelligent, real-time and accurate inhibition of dendritic crystals in the rare earth metal electrolysis process is achieved, short circuit, splashing and electrode ablation are effectively prevented, the compactness and purity of metal deposition are improved, the current efficiency is remarkably improved, and compared with a traditional scheme, the method has the advantages of being high in real-time performance, good in inhibition effect, small in interference and high in adaptability, and the method is suitable for popularization and application. And efficient and safe preparation of the rare earth metal is ensured.

The invention relates to the technical field of sewage treatment, and discloses a combined treatment method of acid wastewater. The combined treatment method of the acid wastewater comprises the following steps: introducing the acid wastewater generated in an industrial process into an electrochemical device, loading a nonmetallic mineral material on an anode of the electrochemical device, and neutralizing the acid wastewater and extracting heavy metals through electrochemical treatment; the solution subjected to electrochemical treatment enters a sedimentation tank, carbon dioxide in the air is captured and fixed, and then the treated solution meeting the environmental quality standard for surface water is directly discharged. The acid wastewater treatment method is simple, efficient and easy to operate, meanwhile, heavy metal recovery is achieved, non-metallic minerals which are easy to obtain and environmentally friendly are introduced into the anode of the electrochemical device, hydrogen ions released in the electrolysis process are consumed, inhibition of the hydrogen ions on heavy metal deposition is reduced, and the extraction rate of the heavy metal in the wastewater is increased. And the solution subjected to electrochemical treatment is used for capturing and fixing the carbon dioxide, so that the treatment liquid is directly discharged.

The invention belongs to the technical field of metal coatings, and particularly relates to a preparation method of a modified MoSi2 anti-oxidation coating on the surface of molybdenum or molybdenum alloy, at least one of NaCl-KCl-NaF powder, Na2SiF6 powder, Si powder and borax / B4C powder, at least one of HfB2 powder and Y / Y2O3 / YCl3 powder are selected, and a Mo-Si-B-Hf-Y composite coating is prepared on the surface of the molybdenum alloy through a two-step fused salt non-electrolytic process, moSi2 is used as a base material of the coating so that the oxidation resistance of the composite coating can be guaranteed, the oxidation resistance of the coating can be further improved by adding a proper amount of B element, Hf element and Y element, finally, good oxidation resistance, good compactness and durability of the coating are achieved, and application of molybdenum or molybdenum alloy in a high-temperature service environment can be met.

The invention relates to the technical field of resource recovery and metallurgy, and discloses a method for separating high-purity metal from neodymium-iron-boron alloy waste, which comprises the following steps: by taking the neodymium-iron-boron alloy waste as an anode and an inert material as a cathode, oxidizing and dissolving Nd, Dy, Pr, Co and Fe into electrolyte by adopting constant-voltage electrolysis, and separating out part of Fe at the cathode to obtain high-purity iron; adding sodium sulfate into the electrolysis tail liquid, adjusting the pH value, and filtering to obtain sodium sulfate double salt precipitate of rare earth and filtrate; h2O2 is added into the filtrate, sodium jarosite is obtained through filtration by adjusting the pH value, NH4HCO3 is added into the iron-removed filtrate to precipitate CoCO3, and the tail liquid can be directly and repeatedly used in the electrolysis process; the rare earth sodium sulfate double salt precipitate is sequentially subjected to hydrochloric acid dissolution, two-step extraction, precipitation and roasting, and Dy, Nd and Pr oxides are obtained respectively. Comprehensive recovery of metal is achieved through the processes of electrolysis, extraction, precipitation, roasting and the like, and the method has the advantages of being simple in process, high in metal purity, low in material consumption and energy consumption, free of pollution and easy to industrialize.

An apparatus and process for electrolyte purification can be configured to remove iron from a solution to purify an electrolyte solution for feeding to one or more electrolyzers for use in producing hydrogen from water via electrolysis. Embodiments can utilize a reactor having an iron removing agent positioned therein such that the electrolyte solution can be passed through a vessel of the reactor for removal of iron. Other embodiments can include inclusion of an iron removing agent in a tank being agitated with water and electrolytic material (e.g. KOH material) for forming the electrolyte solution and subsequently filtering out iron containing materials included in the formed solution via the iron removing agent. Embodiments can be configured to provide an electrolyte solution having a pre-selected iron concentration to help prevent fouling of electrodes utilized in electrolysis processing.

The invention relates to the field of non-ferrous metallurgy, and more particularly to the electrolytic production of aluminium, and can be used in automatic raw material feed systems to reduce the risks of insufficient raw material being introduced into a melt as a result of the adhesion of cooled electrolyte to a crust breaker. Proposed is a method for controlling the feed to an aluminium electrolysis cell, involving an automatic raw material feed system capable of distributing the requisite amount of raw material for an individual electrolysis cell in a metered fashion, taking into account the actual state of said cell by continuously measuring the distribution of current across the anodes. The technical result of the invention is that of reducing the risks of insufficient raw material being introduced into the melt as a result of the adhesion of cooled electrolyte to a crust breaker, and ensuring more efficient distribution of the alumina feed to a cell, thereby permitting a reduction in production costs, with a reduction in net costs, by making it possible to avoid excess consumption of raw material and to increase the yield of primary aluminium accordingly.

The present invention relates to an electrolyzer designed for the generation of hydrogen and oxygen through water electrolysis. The electrolyzer comprises a housing structure accommodating at least one electrolytic cell, which includes an anode, a cathode, and an ion-conducting membrane. A water inlet is provided to introduce water into the electrolytic cell, and an electrical power source is operatively connected to the anode and cathode to facilitate the electrolysis process. The electrolyzer also includes separate outlets for the efficient extraction of hydrogen and oxygen generated during electrolysis. A multi-parameter optical measurement system is integrated within the electrolyzer. This system features at least one optical fiber with multiple sensing points distributed along its length, each capable of detecting various operational parameters within the electrolyzer.

The invention provides a novel metal-based nano catalytic coating electrode and a preparation method thereof.The metal-based nano catalytic coating electrode comprises a metal matrix and a conductive mechanism, and the metal matrix is sequentially provided with a corrosion-resistant middle layer, a transition layer, a nano-doped ceramic oxide active layer and a porous enamel ceramic isolation layer from near to far; and the metal substrate is fixedly connected with the conductive mechanism. The metal base body is of a plate-shaped structure, a net-plate-shaped structure or a plate-column-shaped structure. The corrosion-resistant middle layer of the metal-based nano catalytic coating electrode can prevent the metal matrix from being passivated in the electrolysis process, so that the service life of the electrode is prolonged; the plated layer can be used as a bonding bridge between the metal matrix and the doped ceramic oxide layer, so that the stress generated by sudden change of temperature, crystal form and the like in the coating preparation process is reduced, and the bonding force between the coating and the metal matrix is greatly improved; the porous enamel ceramic isolation layer can effectively prevent a solution from scouring the doped ceramic oxide active layer, and the service life of the doped ceramic oxide active layer electrode is prolonged.

The invention belongs to the technical field of metallurgy, and relates to a complex gold concentrate multi-element comprehensive recovery method which comprises the following steps: S1, complex gold concentrate and auxiliary materials are subjected to bottom blowing smelting in an oxygen-enriched air atmosphere to obtain matte, bottom slag and flue gas; s2, copper matte and auxiliary materials are subjected to top-blowing converting in the air atmosphere, and crude copper, flue gas and converting slag are obtained; and S3, the crude copper and carbonate are refined in the air atmosphere, after refining is finished, sulfur hexafluoride gas is introduced for a reaction in the air atmosphere, methane gas is introduced for reduction in the inert atmosphere after the reaction is finished, and the copper anode plate is obtained. According to the method, arsenic, antimony and bismuth in the crude copper are removed through two-step oxidation and impurity removal, and the phenomenon that arsenic, antimony and bismuth elements in the complex gold concentrate are enriched in the copper anode plate along with smelting and refining, and consequently the copper anode plate is passivated in the subsequent electrolysis process is avoided; and the recovery method is simple in process and high in recovery rate.

The invention discloses a green continuous production process of electrolytic manganese dioxide, which comprises the following steps: mixing a manganese-containing raw material and sulfuric acid according to a mass ratio of 1: (1.2-1.5), and then carrying out acid leaching at 80-90 DEG C for 2-3 hours to improve the manganese leaching rate to 91-98%; 10-15% hydrogen peroxide oxidation is combined with accurate regulation and control and flocculent precipitation of pH 5-6, so that the iron impurity residue is less than or equal to 5 ppm; in the electrolysis process, sulfuric acid is continuously supplemented to maintain the concentration of 150-180 g / L, the titanium-based lead dioxide anode and the stainless steel cathode are matched, and the current efficiency is 88-91.5%; and carrying out three-stage countercurrent washing and drying at 120-130 DEG C on the product to obtain the electrolytic manganese dioxide with the purity of more than or equal to 93%. The process provided by the invention is suitable for resource utilization of low-grade pyrolusite, and the obtained product is mainly used in the fields of lithium-manganese battery positive electrode materials, magnetic materials and catalyst carriers.

The utility model discloses waste water electro-desalting equipment, which belongs to the technical field of waste water treatment, and comprises a cooling tower and a cooling water tank arranged at the bottom of the cooling tower, the input end of the cooling tower is communicated and connected with a circulating water main pipe, the circulating water main pipe is communicated and connected with a circulating water branch pipe, and the circulating water branch pipe is communicated and connected with a circulating water outlet pipe. The output end of the circulating water branch pipe is connected with an electrochemical water treatment device, a large number of scale inhibition small molecules can be generated in the electrolysis process, a very good scale inhibition effect can be achieved, a dense ferroferric oxide (Fe3O4) protection film can be generated on the surfaces of a system pipeline and the pipe wall of heat exchange equipment by using an electrochemical technology for a long time in a circulating water system, and the service life of the circulating water system is prolonged. The corrosion rate of carbon steel equipment is less than or equal to 0.075; and when the electrochemical water treatment device continuously operates, a circulating water system can safely and stably operate in an energy-saving and zero-pollution manner for a long time.

The invention relates to the technical field of rare earth electrolysis, and discloses an intelligent feeding system for rare earth metal electrolysis and a using method thereof.The intelligent feeding system comprises an intelligent feeding algorithm module, a controller and a rare earth discharging machine, and the controller is used for receiving parameters output by the intelligent feeding algorithm module; the controller is further used for sending a discharging instruction to the rare earth discharging machine. And the intelligent feeding algorithm module comprises an electrolysis process data acquisition module, an electrolytic bath state evaluation module, an electrolysis parameter prediction module and an electrolysis prediction parameter optimization module. According to the method, the state of the electrolytic cell is accurately evaluated through the intelligent feeding algorithm module, the process parameters are accurately predicted on the basis of the state, finally, the electrolytic process parameters are optimized by combining the cell state judgment result and the electrolytic process parameter prediction result, and the optimal solution parameters are output. And the controller responds and issues an instruction to control the blanking rate of the rare earth blanking machine, so that the content of rare earth elements in the molten electrolyte is effectively controlled.

According to the double-cathode and double-liquid-supply diffuser blade nesting electrolysis device and the machining method, double-channel liquid supply is adopted, liquid is supplied to the whole molded surface of a blade through a main channel, meanwhile, liquid is supplied to the blade basin direction and the blade back direction of the blade through an auxiliary channel, the flow of a machining area is greatly increased, a low-speed area is reduced, product discharging is facilitated, and the machining efficiency is improved. The processing stability is improved. Besides, double cathodes are adopted, when the main cathode corrodes the blade surface, the auxiliary cathode is used for removing the allowance distributed in the blade basin direction and the blade back direction at the same time, short circuit caused by the fact that the wedge block is clamped between the cathodes and a workpiece after root breaking is prevented, machining stability is improved, and machining efficiency is improved. The problem that the processing stability is poor due to short-circuit burn of the diffuser in the trepanning electrolysis process is solved.

The invention provides a composite additive for an electrolytic copper foil, a preparation method of the electrolytic copper foil and the electrolytic copper foil, and belongs to the technical field of electrolytic copper foils. The lithium battery copper foil additive is an aqueous solution and comprises an agent A, an agent B, an agent C and an agent D. The agent A is one or more of sodium hydroxymethyl sulfonate, sodium 3-mercaptopropanesulfonate and sodium N, N-mercaptopropanesulfonate, the agent B is one or more of fish gelatin, polyethyleneimine and polyacrylamide, the agent C is polyoxyethylene polypropylene ether and polypropylene glycol, and the agent D is one or more of polyethylene glycol, polyethylene glycol and polyethylene glycol. The agent D is one or more of cyclopentyl methyl ether and a water-soluble additive with the code name of HG. The action mechanism of the composite additive system in the electrolysis process is explored, the optimal composite additive proportion is explored according to the additive action mechanism under the standard electrolysis process parameters, and the copper foil good in appearance and mechanical property is prepared; and the characteristics of tensile strength, elongation, roughness, purity, uniformity, surface wetting tension and the like are excellent.

The invention relates to the technical field of circulating water treatment, in particular to a circulating water electric polarization flocculation descaling system which comprises a circulating water tank, a heat exchanger, a water cooling tower, an electrolytic bath, an inclined tube sedimentation tank, a carbon dioxide gas supply device and a pickling device. A membrane assembly is arranged between the cathode plate and the anode plate, and a flocculation polar plate is arranged between the membrane assembly and the cathode plate; according to the invention, the flocculation polar plate is additionally arranged in the electrolytic bath, the scale crystallization time and the scale precipitation time are reduced by utilizing metal hydroxide generated in the electrolysis process of a soluble metal anode to flocculate tiny scale particles generated in the main process, and meanwhile, the concentration of hydroxyl is increased and the precipitation of calcium hydroxide is improved by the arrangement of the flocculation polar plate; according to the invention, carbon dioxide is introduced into the electrolytic bath, so that scale separation capacity is improved, scale on a polar plate and a membrane module is reduced under the condition of aeration flushing, and the operation interval of an auxiliary process is prolonged.

The invention relates to the technical field of water pollution control and treatment, and particularly discloses electroplating wastewater heavy metal ion treatment equipment. The cathode bar is sleeved with the isolation cover provided with the multiple communicating grooves at intervals in the circumferential direction, and the annular mounting base with the lifting mechanism is slidably mounted outside the isolation cover, so that the clearing mechanism in the mounting base can dynamically clear sediments in the length direction of the cathode bar. The design of the communicating groove of the isolation hood not only allows electroplating wastewater to be in full contact with the cathode bar, but also restrains sediments in an area in the groove by limiting a fluid diffusion path, so that disordered diffusion of metal particles in the electrolytic tank is effectively prevented. And the lifting motion of the mounting seat is matched with the clearing mechanism, so that sediments on the surface of the cathode can be continuously stripped in the electrolysis process, the efficiency loss caused by shutdown clearing in a traditional aeration method is avoided, meanwhile, the secondary pollution risk of suspended sludge is reduced, and continuous and efficient recovery of heavy metal ions is realized.

The invention provides a preparation method of a PEM water electrolysis anode diffusion layer, which relates to the field of PEM water electrolysis. Titanium nanotubes with different pore sizes are selected, and the large-pore titanium nanotubes are used to transmit liquids, and the small-pore titanium nanotubes are used to transmit gases, so that the gas and liquid transmission in the PEM water electrolysis process is highly ordered, and good liquid and gas management functions are achieved; the surfaces of the titanium nanotubes and titanium powders are attached with noble metal ions, and then oxygen is introduced for calcination, so that the noble metal ions form an oxide grid structure and are attached and embedded in the surfaces of the titanium nanotubes and titanium powders, which has higher firmness, protects the titanium material from being oxidized in the water electrolysis process, and improves the conductivity and catalytic ability of the anode diffusion layer.

Electrolysis device for arrangement in a water container (4), comprising: (a) at least one rotating cathode (120) mounted on an axis (112) and designed to rotate during an electrolysis process; (b) at least one stationary cathode cleaning element (140) configured to contact a surface of the rotating cathode (120) so that deposits are removed from the rotating cathode (120) during the electrolysis process while the rotating cathode (120) is rotating, wherein the at least one stationary cathode cleaning element (140) is pre-tensioned outwards so that a scraping edge (152 a,b) of the at least one stationary cathode cleaning element (140) is in contact with the surface of the rotating cathode (120), and wherein the stationary cathode cleaning element (140) is constructed with a support extension (156) wherein the curvature of the support extension (156) substantially corresponds to the curvature about the axis (112) and the support extension (156) bears against the surface of the axis (112), thereby providing suitable orientation of the stationary cathode cleaning element (140) is maintained with the scraping edge (152 a,b); and (c) at least one stationary anode (132) arranged adjacent to the rotating cathode (120).