90 results about "Electrolysis operation" patented technology

The invention discloses a method for extracting copper by utilizing waste browning liquid. The method comprises the following steps of: adding flocculating agent to the waste browning liquid, so that large particles and organic substances with multiple potential adsorption points in the waste liquid are preliminarily settled; filtering the treated waste browning liquid to remove filter residues; adding chlorine salt to the filtrate; placing the solution to an electrolytic cell, coating indium oxide on the surface of a titanium mesh as an anode, carrying out electrolysis by using red copper as a cathode to recycle copper; or adding gelatin, thiourea and casein to the solution for electrolysis to recycle block copper. The method for extracting copper by utilizing waste browning liquid can be used for carrying out electrolysis by carrying out simple flocculating settling filter treatment or adding additive, is simple to operate, low in treatment cost and capable of recycling high-quality copper.

The present invention offers an operation method of an ozonizer and an ozonizer apparatus to improve ozone gas purity and to achieve long and safety electrolysis operation in such manner that, during normal operation of the ozonizer, ozone gas is generated at the anode in the anode compartment and hydrogen gas is generated at the cathode in the cathode compartment; and only when the ozonizer is stopped and operation is switched to protective current operation during which minute electric current is supplied to protect said anode, oxygen-containing gas is supplied to said cathode compartment after electrolyte and hydrogen gas in said cathode compartment are all drained out, so that said cathode is made function as a gas electrode for oxygen reduction reaction, using said cathode as a reversible electrode with two functions as a gas generation electrode and a gas electrode, thereby during normal operation, ozone is generated efficiently, and during the protective current operation, when safety is a key issue, hydrogen gas is not generated at the cathode and mingling of hydrogen gas into ozone gas generated at the anode is prevented.

The present invention aims to provide an activated cathode enabling a long-time stable operation with hydrogen overvoltage maintained at a low value, keeping a high remaining rate of the catalyst element after a cease of operation for a short-circuiting and after an electrolysis operation at a high current density, restricting catalyst loss to a little, and having a strong resistance to contamination caused by electrolyte impurity elements. The present invention relates to a cathode for hydrogen evolution with a catalyst layer formed on the cathode substrate, having, at least, three elements comprising platinum, cerium and palladium, as essential element, in a state of metal, metal oxide, or hydroxide, contained, where the mole fraction of respective element being x, y, and z, within a range of 5mol%=x=90mol%, 5mol%=y=55mol%, 5mol%=z=65mol%.

A gas diffusion layer with a micro protective layer is utilized in the electrochemical cells. The cell mainly includes end plates, current collectors, flow field plates, gas diffusion layers, catalyst layers, a proton exchange membrane and a circuit unit. When the cell functions as a fuel cell, hydrogen reacts with oxygen to generate electricity and water. Reversely, when the cell functions as a water electrolysis cell, water was decomposed electrolytically to produce hydrogen and oxygen gases. In this manner, the present invention particularly has the gas diffusion layer to be coated with a micro protective layer so as to prevent the gas diffusion layer from being corroded by active oxygen species generated within the oxygen electrode under the catalysis during water electrolysis operation.

The invention provides a device and method for decomposing chlorate generated by side reaction of an anode chamber of an electrolytic cell in chlor-alkali production and a related acid adding process.According to the method, an acid process for an electrolysis system is creatively improved, and the high peracid content is utilized to enhance the chlorate oxidation electrode potential and enhancethe reaction temperature, thereby greatly enhancing the decomposition speed and decomposition efficiency of the chlorate, completely decomposing the chlorate in the light salt brine into Cl2, Cl <-> and H2O at one time, avoiding the unstable gas ClO2 in the gas phase, and directly merging the pure wet Cl2 into a main pipe. The peracid content in the light salt brine after chlorate decomposition isutilized to replace light salt brine for dechlorination and acidification, thereby saving the self-used hydrochloric acid and caustic soda for electrolytic production. In the actual electrolysis operation, the decomposed chlorate can be balanced with the byproduct chlorate of the electrolytic bath at any time, so that the chlorate enriched in the electrolysis system can be quickly reduced, the problems of chlorate enrichment in the electrolysis system, influence on caustic soda quality, strong corrosion to solid caustic soda equipment and the like are solved, and the technical progress of chlor-alkali electrolysis production is greatly promoted.

Solid oxide stacks used as fuel cells generate electricity from hydrogen or other sources. By an electrolysis process such standard fuel cells can be operated in order to create hydrogen or other electro chemical by-products. Unfortunately stacks generally operate at relatively high temperatures which will be difficult to sustain purely on economic grounds. In such circumstances less efficient operation can be achieved at lower temperatures where the air-specific resistance is higher by balancing with the electrical power input in order to cause the disassociation required. In such circumstances by provision of an incident heat source, whether that be through a heat exchanger heating the compressed air flow, or recycling of a proportion of exhaust from the stack, or combustion of a product from stack disassociation the result will be a sustaining electrolysis operation reducing the amount of expensive electrical supply required to achieve dissociation.

The present invention discloses an arrangement method for an anode unit for electrolysis. Equipment of the method comprises: an acceptance plate apparatus capable of reception of the anode, an acceptance plate chain conveyor and separation piece, a vertical correction ear, a weighing mechanism, a traversing chain conveyor, a plate surface shaping pressure machine and thickness measuring device, a side lug milling device, a bottom lug milling device, an oblique lifting device, and a plate arrangement chain conveyor and plate arrangement frame. The arrangement method of the present invention has the following advantages that: the side lug milling function forms an open circuit or a parallel connection in the unit system, such that the side lug milling device can work separately, the work of the anode unit system is not affected, the production capacity of the anode unit is not reduced substantially in spite of increase of the anode lug thickness, the reduction of the production capacity is proportional to the number of the anode requiring lug milling, the unit can meet the requirements of the electrolysis operation rate; meanwhile the speed of the side lug milling can be properly reduced, such that the milling force can be reduced so as to prolong the service life of the mill, and reduce the production cost.

The invention discloses a protection method for separating an electrode guide rod from corrosion caused by electrolyte melt and in particular relates to a protection method of a noble electrode aluminium cell electrode guide rod. The method is characterized in that fire-resistant powder is prepared from sodium carbonate, calcium carbonate, calcium oxide, boric oxide, sodium fluoride, and industrial aluminium oxide which are used as raw materials, and can react with the electrolyte melt fast to generate a solid crusting with the high melting point; the fire-resistant powder is fed between the electrode guide rod and a compound anti-corrosion ceramic protection sleeving tube; when an electrode is in normal electrolysis operation, the electrolyte melt permeating from gaps or micropores can react with the fire-resistant powder to form the compact crusting to obtain an electrode guide rod protection layer for separating the corrosion caused by the electrolyte melt; the further permeating of the electrolyte melt and the electrochemical corrosion of the electrolyte melt to the guide rod can be blocked by the protection layer; the compound anti-corrosion ceramic protection sleeving tube can be used for resisting the dissolving corrosion caused by the electrolyte melt. In the method, the fire-resistant powder can be used for enabling the electrolyte permeating process to be changed to the protection layer forming process, the compound anti-corrosion ceramic protection sleeving tube is adopted, the practicality and the long-time stability of the compound anti-corrosion ceramic protection sleeving tube are greatly improved, and a general assembly scheme is simple and easy to implement.

The invention belongs to the technical field of electrolytic zinc optimization, and provides an electrolytic additive formula for improving zinc sulfate solution electrolyzed zinc quality and the production environment and an application method. The method comprises the steps that a zinc sulfate solution is adopted as an electrolyte, a lead-silver alloy plate is used as an anode plate, and a calendered aluminum plate is used as a cathode plate; when the density of zinc on the calendered aluminum plate is reduced, a bone glue solution is added into the electrolyte; and polyacrylamide, polyethylene glycol, sodium methylene dinnaphthalene sulfonate are prepared to be a polyacrylamide solution, a polyethylene glycol solution and a sodium methylene dinnaphthalene sulfonate solution respectively, and the prepared solutions are added into the electrolyte correspondingly. By adopting the formula, the technical problems that the zinc sulfate solution electrolyzed zinc produced by a common cobalt removal process adopting reagents is poor in quality, high in lead and iron content and low in ingot casting recovery rate are solved; meanwhile, the field environment is improved, and the environment pollution is reduced; and adverse factors influencing the quality of zinc electrolyzing and electric energy consumption in the electrolysis operation can be eliminated by adopting the using method,so that the quality of the electrolytic zinc and the operating environment are greatly improved.

The invention provides an ammonia nitrogen wastewater treatment method and system. The ammonia-nitrogen wastewater treatment method comprises the following steps: circulating an etching solution in anetching solution tank and an electrolytic tank; carrying out electrolysis operation on the etching solution in the electrolytic tank; carrying out gas extraction operation in the electrolytic tank toobtain chlorine gas; detecting the copper content of the etching solution in the etching solution tank, stopping the electrolysis operation if the concentration of copper ions is 120-130g / l, and adjusting preset components of the etching solution to obtain a PCB etching solution; if the concentration of copper ions is greater than 130g / l, continuing the electrolysis operation; circulating ammonia-nitrogen wastewater in an ammonia-nitrogen wastewater collection tank and an absorption tank; and introducing chlorine into the ammonia-nitrogen wastewater in the absorption tank, and performing ammonia-nitrogen removal operation. According to the ammonia-nitrogen wastewater treatment method, the ammonia-nitrogen wastewater treatment cost is reduced, the ammonia-nitrogen wastewater treatment effect is improved, and ammonia-nitrogen wastewater treatment can be completed only by using equipment with a relatively small volume.

The invention provides a method for degrading heavy metals in sludge through alkaline hydrolysis-electrolysis combination, and belongs to the technical field of sludge resource utilization. Sludge in a secondary sedimentation tank of a sewage treatment plant is sieved and settled, supernate is removed, microorganisms in the sludge are subjected to cell breaking by adopting a hot-alkali combined method, internal dissolved substances in the microorganisms are released, and a sludge lysate is prepared. An electrolyte is added into the sludge lysate solution in which the heavy metals in the microbial cells are released, and an electric field and a circulating device are externally added. According to the method, microbial cells are broken through the heat-alkali combined method, intracellular heavy metals are released, and then the concentration of the heavy metals in the sludge hydrolysate is effectively degraded through electrolysis. The electrochemical method is short in degradation period, simple in equipment, low in energy consumption and free of secondary pollution, subsequent sludge resource reutilization is facilitated, the cost can be controlled by controlling electrolysis operation parameters, and the disclosed method is economical, stable and reliable.

The invention relates to a steel plate surface electrolysis descaling process which has the advantages that the steel plate surface electrolysis descaling process is good in continuity, short in treatment time, environment-friendly in treatment process and free of wastewater, waste gas or waste liquid, the surface of a treated steel plate is bright, and quality requirements of a product can be completely met. The steel plate surface electrolysis descaling process comprises the following steps: conveying a steel strip to an uncoiler by a coil feeding trolley for uncoiling, and uncoiling and tracking the steel strip to a peeling machine by a pressing roller, peeling the steel strip, and treating most oxide skin on the steel strip; implementing leveling treatment on the steel strip; flattening the heads of two ends of a steel plate; polishing defects of the steel strip by steel grits; washing with clean water for a first time so as to remove stain left on the polished steel strip; feeding the steel strip into an electrolytic bath for corresponding electrolysis operation; after electrolysis, washing with clean water for a second time so as to remove stain left on the steel strip after electrolysis; after washing, drying the steel strip, tracking and conveying the steel strip to a coiler by a S-shaped tension roller, and coiling the steel strip by the coiler.

The invention relates to a lead recycling method for a perovskite battery. The lead recycling method comprises the following steps that the perovskite battery is smashed to form fragments; the fragments are soaked in a soaking solution and subjected to solid-liquid separation, and thus a leady separation solution is obtained; the soaking solution comprises an organic solvent which can dissolve perovskite materials; and chemical precipitation operation or electrolysis operation is conducted on the leady separation solution so as to obtain a leady solid body. According to the lead recycling method for the perovskite battery, on one hand, lead is recycled, therefore lead pollution is avoided, and the environment is protected; on the other hand, the recycled lead can be changed into valuable matter from a waste material, and thus the effective utilization of resources is improved. In addition, the lead recycling method for the perovskite battery is simple and practicable, and beneficial for application to a mass industry. The invention further provides a lead recycling device for the perovskite battery.