304results about How to "Lower cell voltage" patented technology

This invention discloses a fluorine-containing polymer and its application as ion exchange fiber material. The fluorine-containing polymer is a perfluoro resin containing sulfonylfluoride groups, and is shown in formula 1. The fluorine-containing polymer has ion exchange function, and is prepared by free radical copolymerization of perfluorosulfonyl vinyl ether, tetrafluoroethylene and hexafluoropropylene in the presence of dispersant, solvent and initiator. The dispersant/solvent is mixed solution of melamine derivative containing linear perfluoro hydrocarbon and water. The fluorine-containing polymer can be melt-spun into polymer fibers, which can be woven into fiber network that can be used as the reinforcing network material for ion exchange membranes and chlor-alkali ion membrane to reinforce and improve the ion exchange ability.

A single-cell-thickness nano porous cobalt oxide nanosheet array electrocatalytic material is characterized in that a metal-doped cobalt oxide primary nanosheet array is perpendicularly grown on a conductive substrate, a porous nanosheet is obtained from each primary nanosheet, and the nanosheets are of porous structure; the material is used as an electrocatalyst for oxygen evolution reaction; the material also has excellent hydrogen evolution performance and may function as a bifunctional catalyst for an alkaline full-decomposition water system. The invention has the advantages that the material can effectively reduce overpotential and peaking potential of oxygen evolution reaction, increase conversion rate of single cobalt atoms and operate stably and continuously in a strong alkali environment; the material has excellent oxygen evolution reaction performance and can be applied as an anode and cathode of a full-decomposition water system, effectively reducing trough voltage; the material is simple to prepare, convenient to operate, low in cost and environment-friendly, and new idea and strategy are provided for the guide design and performance optimization of the bifunctional catalyst for the full-decomposition water system.

The invention relates to a fiber-reinforced perfluorinated ion exchange membrane containing a non-continuous nano-pore canal and a preparation method thereof. A basic membrane of the membrane comprises a perfluorosulfonic acid ion exchange resin layer and a perfluorocarboxylic acid ion exchange resin layer, reinforcing fiber mesh cloth is arranged in the perfluorosulfonic acid resin layer, and gas release coatings are sprayed on the surfaces on the two outer sides of the basic membrane; and the fiber-reinforced perfluorinated ion exchange membrane is characterized in that the non-continuous nano-pore canal is further contained in the perfluorosulfonic acid resin layer. The membrane is prepared through a melting co-extrusion or multi-layer hot-pressing compounding process. The membrane is used for the ion exchange membrane in the chlor-alkali industry and has better mechanical properties and electrochemical properties.

The invention discloses a grate type titanium-based PbO2 electrode for nonferrous metal electrodeposition and a preparation method of the grate type titanium-based PbO2 electrode. The PbO2 electrode comprises an anode consisting of a lead-coated copper conducting bar (1) an a group of titanium rods (2) connected below the lead-coated copper conducting bar, wherein the titanium rods are successively formed by a titanium substrate, a lead silver alloy bottom layer, an alpha-PbO2 composite middle layer and a beta-PbO2 activation surface layer form inside to outside. The preparation method comprises the following steps: carrying out quenching, tapping, sand blasting, deoiling and activating, connecting the titanium substrate with the lead-coated copper conducting bar, electrically depositing a Pb-Ag-TiO2 composite layer on the titanium substrate, plating an alpha-PbO2 composite layer in an alkaline way and plating a beta-PbO2 composite layer in an acidic way to obtain the grate type titanium-based PbO2 electrode for nonferrous metal electrodeposition. The electrode prepared according to the invention has the advantages of good electrocatalytic activity, strong electrode electrical conductivity, low slot voltage in electrodeposition, long service life and low energy consumption.

The present invention relates to surface treatment of steel plate, and is especially zinc electroplating process to form homogeneous fine zinc layer onto the surface of cold rolled steel plate and environment friendly zirconium-containing no-chromium fingerprint resisting paint for producing zinc electroplating fingerprint resisting steel plate. Cold rolled steel plate is first electroplated with zinc and then coated with fingerprint resisting paint. The production process of fingerprint resisting steel plate features the production process including the first production of zinc electroplated steel plate via vertical anode electroplating process, coating with water-base fingerprint resisting paint with zirconium to replace chromium, and curing through roasting at temperature lower than 125 deg.c to form composite resin film. The electroplated zinc layer has stable and reliable quality and the organic composite resin film has no environmental pollution.

The invention relates to a novel rare-earth electrolytic bath. A gap is reserved in the center of each anode, and the bottom surface of each anode is a concave surface being concave from the periphery towards the center. A cathode is correspondingly arranged below each anode. The cathodes are buried in a protruding high-temperature-resisting material. The top of each cathode is an arc convex surface and protrudes out of the high-temperature insulating material. An electrical insulating layer is arranged between the high-temperature-resisting material and each cathode. A metal groove is formed between every two cathodes, and the high-temperature-resisting material is concave downwards to form the metal grooves. A cathode steel bar is located at the bottom of each cathode and connected with the cathode. The space between every two adjacent cathode steel bars is filled with a graphite block. An electrical insulating layer is arranged between each graphite block and the corresponding cathode steel bar. A feeder is arranged on the top of a bath body. According to the novel rare-earth electrolytic bath, the convex surfaces of the cathodes are higher than the high-temperature insulating layers, so that a high-temperature zone of the electrolytic bath is moved upwards. Through the metal grooves designed for the electrolytic bath, the contact area of metal and an electrolyte is reduced, re-dissolution of the metal is restrained, and the current efficiency is improved. The shapes of the anodes of the electrolytic bath are beneficial for discharging of anode bubbles.

The invention relates to a composite alloy inert anode for aluminum electrolysis. The composition of the matrix of the composite alloy inert anode for aluminum electrolysis is (x)A(y)B, wherein X is the content of A in percentage by weight, y is the content of B in percentage by weight, X is 40-100%, and y is 0-60%; A consists of one or multiple elements of Cu, Ni, Fe, Co, Al, Mn, W, Cr, Ti, Sn and Zn; and B consists of one or multiple elements of Mo, Pd, Ag, Cd, Au, Pt, Sb, Mg, Ir, Bi, Pb, Si, N, C and rare-earth. A compact protective film is coated on the matrix, and is an oxide film and or a permeator. The composite alloy inert anode is adopted in the process of electrolysis, thus solving the problems of poor conductivity and thermal shock stability of ceramic anodes; the composite alloy inert anode has better corrosion resistance as compared with a single alloy anode; and in addition, the composite alloy inert anode is especially suitable for being applied in a low-temperature aluminum electrolysis system and can also be applied in the field of fusion-electrolysis metallurgy of rare earth, Mg and the like.

The invention relates to a titanium-based beta-MnO2-RuO2 composite coating anode plate and a preparation method and application thereof, and belongs to the technical field of anode plates in wet metallurgy. The titanium-based beta-MnO2-RuO2 composite coating anode plate comprises a titanium clad copper conducting beam, a titanium net matrix, silica gel cases and a conducting head. The left end andthe right end of the titanium clad copper conducting beam are sleeved with the silica gel cases, the conducting head is fixedly arranged at the bottom end of the titanium clad copper conducting beamand externally connected with a power source, the titanium net matrix is fixedly arranged at the lower end of the titanium clad copper conducting beam, and the titanium net matrix is sequentially coated with a gradient Ir-Ta-Sn-SbOx interlayer and a beta-MnO2-RuO2 composite surface active layer. The titanium-based beta-MnO2-RuO2 composite coating anode plate has excellent catalytic performance andlong service life, the cell voltage is low in the electrolytic process, it is effectively avoided that in the using process of a titanium matrix, oxygen is generated, so that a TiO2 film is generated, and titanium-based metal oxide anode passivation fails, environmental friendliness is achieved, and the defect that the cost of a precious metal oxide coating is too high is overcome.

The invention relates to a method for preparing a carbon nano tube modified bipolar membrane with anion groups. The method comprises the following steps of: preparing a sodium carboxymethylcellulose (CMC) aqueous solution or a sodium alginate (SA) aqueous solution by using sodium carboxymethylcellulose or sodium alginate, adding a carbon nano tube with the anion groups, stirring and defoaming under reduced pressure to obtain viscous membrane liquid; casting the viscous membrane liquid in a smooth culture dish to prepare a cation exchange membrane; stirring and dissolving chitosan in 1 to 10 mass percent of acetic acid aqueous solution to prepare 1 to 10 mass percent of chitosan acetic acid aqueous solution, dripping 2.5 volume percent of glutaraldehyde solution slowly with stirring, and defoaming under the reduced pressure to obtain a chitosan (CS) anion membrane liquid; and forming a membrane of the CS anion membrane liquid, fixing the membrane to a prepared cation membrane layer, and airing at room temperature to obtain the bipolar membrane. Due to the adoption of the carbon nano tube modified cation membrane layer with the anion groups, the bipolar membrane has the characteristics of high water dissociation efficiency, small membrane impedance, low tank voltage, high compatibility of two membrane layers and the like.

The invention provides a method for producing one-dimensional nanometer flake zinc powder by directly electrolyzing strong alkaline solution, relating to the production technology of flake zinc powder. The method is characterized by firstly preparing zinc-containing strong alkaline solution, wherein the solution contains 1-100g/L of Zn, 10-200g/L of OH<->, 5-70mg/L of additive A and 10-110mg/L ofadditive B; secondly taking a stainless steel plate as an anode and a magnesium plate as a cathode to electrolyze the solution for 1-180min under the following conditions: the distance between the two plates is 0.5-5cm; the current density is 100-2500A/m2; and the solution temperature is 10-100 DEG C, then stopping electrolysis, rapidly taking out the electrodeposit and washing the electrodepositwith water until the pH value of the water is lower than 8; and finally, rapidly vacuum-drying the washed electrodeposit, thus obtaining the one-dimensional nanometer flake zinc powder, wherein the electrolysis waste liquor is returned to be used for preparing the zinc-containing strong alkaline solution. The method has the following advantages and effects: the produced zinc powder has high activity, is flaky and is 10-100nm thick; the method is low in production cost and energy consumption, is simple to operate and is convenient for mass production; and the defects of high cost, high energy consumption, low capacity, difficulty in controlling quality and the like in the traditional production methods are thoroughly overcome.

A wastewater advanced treatment method coupling membrane and electricity belongs to the technical field of wastewater treatment. The treatment method comprises the following steps: discharged wastewater is filtered through a membrane filtration device to obtain fresh water and concentrated water; the fresh water is recycled, the concentrated water is conveyed into an electrocatalysis and electrooxidation device, and the organic pollutants and organisms in the concentrated water are treated and decomposed by electrocatalysis and electrooxidation; the obtained reclaimed water is conveyed into a bipolar membrane electrodialysis device, and the inorganic salt in the reclaimed water is transformed into acid and alkali, so that resource utilization is achieved; the wastewater with the inorganic salt separated by the bipolar membrane electrodialysis device is adopted as scenic environmental water. According to the treatment method, membrane and electricity are coupled, so that advanced treatment of wastewater, material recycling and emission reduction of pollutants are achieved; all water quality indexes of the fresh water and the concentrated water treated through the treatment method respectively meet the standards of GB/ T 19923-2005 The Reuse of Urban Recycling Water-Water Quality Standard for Industrial Uses and GB/ T 18921-2002 The Reuse of Urban Recycling Water-Water Quality Standard for Scenic Environment Use.

This invention discloses a perfluoro resin containing sulfonylfluoride groups, which is shown in formula 1. The perfluoro resin has ion exchange function, and is prepared by free radical copolymerization of perfluorosulfonyl vinyl ether, tetrafluoroethylene and alkyl vinyl ether in the presence of dispersant, solvent and initiator. The dispersant/solvent is mixed solution of melamine derivative containing linear perfluoro hydrocarbon and water. The fluorine-containing polymer can be melt-spun into polymer fibers, which can be woven into fiber network that can be used as the reinforcing network material for ion exchange membranes and chlor-alkali ion membrane to reinforce and improve the ion exchange ability.

The invention belongs to the water processing technology field, concretely provides a device and a technology for processing degradation-resistant waste water through a hypergravity multistage sacrificial anode electro-Fenton method, and solves the problem of mass transfer limitation in processing degradation-resistant waste water through a sacrificial anode electro-Fenton method. The device comprises a plurality of corrugated cylindrical anodes and anode connection disks and a plurality of corrugated cylindrical cathodes and cathode connection disks. The corrugated cylindrical cathodes and the cathode connection disks are stationary relative to a shell. The centers of the anode connection disks are connected with a rotating shaft. In the technology, the rotary corrugated cylindrical anodes and anode connection disks, the stationary corrugated cylindrical cathodes and cathode connection disks and a H2O2 solution form a hypergravity multistage sacrificial anode electro-Fenton reaction system. The device and the technology can reinforce the mass transfer process of the electro-Fenton reaction. The electrode area utilization rate, the oxygen utilization rate, the H2O2 production rate and the processing efficiency are all raised. The device has advantages of small size, low load and low energy consumption, and is suitable for continuous operation and scale processing.

The invention discloses an oversize continuous-production energy-saving environment-friendly aluminum electrolysis cell, particularly an electrolysis cell with the current intensity of greater than 400kA. The electrolysis cell is mainly composed of a cell shell, (9), a cell lining (4) and an upper structure (10), wherein the upper structure (10) is provided with a novel continuous automatic baked anode (1); an anode network conductive system (2) is arranged in the (1); and the upper structure (10) is also provided with a conventional aluminum oxide blanking system (6), an anode cross beam bus (5) and an anode paste automatic blanking and sealing device (3). The oversize aluminum electrolysis cell can implement continuous energy-saving production. The number of anodes can be set and the anode conductive network can be configured according to the actual cell type, thereby implementing the optimized current configuration in the anode and also implementing continuous energy-saving production of the oversize aluminum electrolysis cell. Besides, the automatic baked anode and blanking pipeline are sealed to implement clean production. The cell lining, bus structure and the like do not need to be changed, and thus, the electrolysis cell is easy to implement.

The invention provides an annular radial-flow negative-pressure suction internal loop photoelectric catalytic reactor, comprising a photoelectric catalysis oxidation reaction system and an annular radial-flow negative-pressure suction internal loop water inlet system, wherein the photoelectric catalysis oxidation reaction system comprises a plate-type tubular DSA anode and a mesh-type tubular titanium cathode; a granular photoelectric catalyst is filled between the anode and the cathode; an ultraviolet generator is arranged in the mesh-type tubular titanium cathode; the annular radial-flow negative-pressure suction internal loop water inlet system is arranged at the lower part of the photoelectric catalysis oxidation reaction system; a liquid injection pipe is arranged at the center of the water inlet system; a plurality of pipelines with adjustable lengths are arranged at a bottleneck of the liquid injection pipe; the liquid injection pipe is communicated with an annular radial-flow water feeder which is densely distributed with constant-diameter round holes in a bottom region of the reactor; a gas injection pipe is arranged at the top of the reactor; an air inlet of the gas injection pipe is connected with a compressed air pump; an air outlet is connected with the atmosphere; the bottleneck is connected with an exhaust pipe at the top of the reactor; and hydrogen generated in the reactor is diluted and discharged.

The invention discloses an inertial electrode low-temperature aluminium electrolytic cell comprising a electrolytic cell body, a metallic ceramic inertial anode, a wettable cathode and a low-temperature electrolyte, wherein, the wettable cathode is arranged at the bottom of the electrolytic cell body; the low-temperature electrolyte is arranged in the electrolytic cell body; the metallic ceramic inertial anode is arranged at the upper part of the electrolytic cell body, and end part of the metallic ceramic inertial anode extends into the low-temperature electrolyte; the metallic ceramic inertial anode is composed of at least two groups of metal ceramic inertial anode sets; each metallic ceramic inertial anode set is composed of at least two metallic ceramic inertial anode monomers; the metallic ceramic inertial anode sets and the metal ceramic inertial anode monomers in the same metal ceramic inertial anode sets are both in electrical parallel connection. The inertial electrode low-temperature aluminium electrolytic cell has reasonable structure, simple and convenient operation, stable operation, less oxygen discharge and small aluminium liquid fluctuation, low electrolytic cell voltage, low operation temperature and less energy consumption, and is suitable for industrial application.

The invention discloses a multi-target optimization method for bath voltage in an aluminum electrolysis process. The multi-target optimization method comprises the following steps: step 1, collectingand washing data of an aluminum electrolysis production site; step 2, establishing a bath state comprehensive index model related to stability, material balance and energy balance; step 3, establishing an autoregression moving average model for predicating a time sequence of a comprehensive index; step 4, taking a state time sequence solved in step 3 as input and establishing a fuzzy neural network for predicating the bath state; step 5, establishing a bath voltage predication model by adopting an ant lion optimized LSSVM (Least Squares Support Vector Machine); step 6, taking minimum difference between the bath voltage and a target value and a good bath state as targets and taking production operation requirements as constraint conditions to establish a multi-target optimization model forthe bath voltage; and step 7, solving the model by adopting a multi-target ant lion optimization algorithm, so as to solve one group of optimized setting values. The group of optimized setting value can provide guidance for operating workers; and the bath voltage is reduced while the good bath state is ensured and the aims of energy saving and consumption reduction are realized.