163 results about "Dual electrode" patented technology

The invention relates to a preparation technology of an electrochemical catalytic material, and aims to provide a method for preparing an electrode material through pulse electrodeposition and application of the electrode material in an oxygen evolution reaction. The method comprises the following steps: constructing a dual-electrode electrolysis system, and co-depositing transition metal ions and selenium ions on a working electrode by adopting a pulse electrodeposition method to form a catalyst layer containing transition metal and selenide; then the working electrode is used for building an electrochemical system, electrochemical activation treatment is conducted on the working electrode through cyclic voltammetry, a selenium phase is induced to fall off, porous metal oxide is formed by reconstructing the surface of a catalyst layer, and the electrode material for the water electrolysis oxygen evolution reaction is obtained. The selenium phase is induced to fall off through electrochemical activation to form a porous metal oxide structure, the specific surface area is remarkably increased, rich oxygen vacancies are formed, the electronic structure is optimized, more active sites are exposed, and the catalytic activity is improved; the method is easy to operate, high in parameter controllability, free of high-temperature and high-pressure equipment and suitable for large-scale production.

The invention relates to the technical field of power grid measurement, in particular to a miniaturized wireless self-powered alternating current electric field measurement method and system. Comprising the following steps: acquiring radio frequency energy in an electric field environment, and converting the radio frequency energy into direct current electric energy through a radio frequency energy acquisition system consisting of a microstrip antenna, a voltage doubling rectifying circuit and an energy management circuit; an alternating current electric field signal is collected through a differential dual-electrode sensor structure, and an electric field voltage signal is generated; amplifying the voltage signal through an instrument amplifier, and obtaining a digital signal of the electric field signal through an analog-to-digital conversion circuit; and processing and analyzing the alternating current electric field information according to the digital signal. By combining a radio frequency energy acquisition technology with a differential dual-electrode sensing structure, the electric field sensor has the performance characteristics of self energy supply, miniaturization, high precision, wide frequency response and low power consumption. The system can measure various types of electric field signals, including sine wave, triangular wave and square wave electric field signals, has a wide frequency range and a wide measuring range, and is excellent in linearity.

The invention discloses a preparation method of a graphite phase carbon nitride / titanium dioxide photo-anode based on carbon dot modification. The preparation method comprises the following steps: firstly, preparing graphite-phase carbon nitride and a carbon dot diluent, adding the graphite-phase carbon nitride and the carbon dot diluent into a precursor solution of titanium dioxide, dispersing and fusing, and growing a composite photocatalyst on conductive glass through in-situ hydrothermal treatment to obtain the photo-anode. The optimal material ratio is analyzed through characterization means such as electrochemical test and ultraviolet diffuse reflection spectrum. The optimal reaction condition of the photo-anode is explored by constructing the double-electrode photocatalytic fuel cell.

The invention discloses a magnetic field auxiliary dry type electrochemical polishing device and method for the inner surface of a pipeline, and the device comprises a base which is provided with a double-sliding-block displacement table, and the double-sliding-block displacement table is provided with a lower sliding block and an upper sliding block; a motor clamp is arranged on the upper sliding block, a motor is arranged on the motor clamp, the motor is connected with an electrode clamp, and the electrode clamp clamps an electrode; a workpiece clamp is arranged on the lower sliding block, a workpiece is arranged on the workpiece clamp, a lower container is arranged below the workpiece, an annular magnet is arranged outside the workpiece in a surrounding mode, and an inner space formed by the workpiece and the lower container is filled with a solid medium. The electrode clamp is connected with the rotating end of the conductive slip ring, and the static end of the conductive slip ring is connected with the anode of the power supply through a wire. The magnetic field assists in regulating and controlling ion migration, dry type electrochemical polishing is achieved by combining the synergistic effect of the two electrodes, liquid electrolyte pollution is avoided, and the device has the advantages of being high in polishing uniformity, convenient and fast to operate and low in cost and is suitable for precise runner inner surface treatment of the additive manufacturing pipeline.

The invention belongs to the field of electric arc furnaces in the metallurgical industry, and particularly relates to the field of electric arc furnace power supply, in particular to a double-electrode alternating-current electric arc furnace capable of achieving frequency-variable smelting operation. A TV1 high-voltage voltage transformer, an electric arc furnace circuit breaker and a CT1 high-voltage current transformer are connected to an inlet wire bus section; the system further comprises a phase-shifting N transformer and an alternating current-direct current-alternating current converter, a primary side winding of the phase-shifting N transformer is connected with the output end of the electric arc furnace circuit breaker, a secondary side of the phase-shifting N transformer is connected with the input end of the alternating current-direct current-alternating current converter, and a TV2 low-voltage voltage transformer and a CT2 low-voltage current transformer are arranged on the wire outlet side of the output end of the alternating current-direct current-alternating current converter. And the output end of the AC-DC-AC converter is connected with the outlet copper pipe, the flexible water-cooled cable and the copper-steel composite conductive cross arm through a large-current line, so that electric energy is transmitted to the dual-electrode graphite electrode. According to the invention, the smelting charging power is improved, the smelting power consumption is reduced, and the smelting efficiency is improved.

The invention provides a surgical electrode and a using method thereof, and relates to the technical field of medical instruments. Two electrode accommodating holes are formed in the fixed sleeve body, a telescopic electrode stem and a rotating electrode stem are respectively arranged in the two electrode accommodating holes, and a bending part is arranged at the end part of the rotating electrode stem; an electrode control circuit board is arranged in the containing cavity and electrically connected with the telescopic electrode rod and the rotary electrode rod. The surgical electrode has the beneficial effects that the telescopic assembly is arranged in the inner shell of the surgical electrode and can control the telescopic electrode rod to stretch out and draw back, so that the surgical electrode can execute single-electrode and double-electrode functions and has multiple functions, and the problem that an existing surgical electrode is single in function is solved; and in the switching process of the single-electrode working state and the double-electrode working state of the operation electrode, the tool bit does not need to be replaced. And in the dual-electrode mode, the distance between the electrodes is adjustable, so that the surgical electrode can adapt to the widths of different surgical wounds, the adaptability of the surgical electrode is improved, and the surgical effect is further improved.

A dual electrode DC electric arc melter 10 for a conductive material 12 comprises a vessel 14 for holding the material. The vessel comprises a sidewall 16, a roof 18 and a bottom 20 and defines a taphole 22 for molten metal. A tilting mechanism 24 enables selective tilting of the vessel to tap the molten metal from the vessel. First 26 and second 28 electrodes, in a normal operative position, extend through the roof into the vessel. An electrode manipulating arrangement 30 is configured to move the electrodes between the normal operative position and a position away from the vessel. A DC power system 32 drives via a DC output the first electrode as a cathode and the second electrode as an anode. An arc deflection compensation circuit 50 is provided for reducing deflection towards the sidewall of arcs extending from the first and second electrodes.

The invention discloses a double-flow slab tundish with a double-electrode plasma heating function. The double-flow slab tundish comprises a tundish body and a tundish cover arranged at the top of the tundish body, and a turbulence controller is arranged at the bottom of the tundish body; a barrage structure is arranged at one end of the interior of the tundish, and a uniflow control wall structure is arranged at the other end of the interior of the tundish. And a dual-electrode plasma heating device is arranged on the ladle cover. Single-flow pouring of the double-flow tundish is achieved, the size of a low-temperature area and the size of a dead area are reduced, slag entrapment is prevented, the temperature in the tundish is uniform, and the plasma heating efficiency is improved. And meanwhile, the tundish casting allowance is reduced.

The invention discloses a double-excitation double-electrode electromagnetic flowmeter for high-frequency pulsating fluid measurement. The double-excitation double-electrode electromagnetic flowmeter comprises a pipe body structure and a control circuit. The pipe body structure comprises a lining and a guide pipe; the inner side face of the guide pipe is covered with a lining. A first group and a second group of electrodes are arranged in the conduit; a first group and a second group of coils are arranged at corresponding positions of the first group and the second group of electrodes in the inner cavity of the catheter; first and second magnetic field shielding covers sleeve the circumferential outer side of the conduit; the first and second groups of coils are respectively positioned inside the first and second magnetic field shielding covers; an annular grounding electrode is arranged between the first group of electrodes and the second group of electrodes; the annular grounding electrode is connected to the conduit through the grounding fastening electrode; the control circuit comprises a CPU module; the CPU module generates complementary periodic excitation waveforms to excite the coil, controls acquisition of electrode signals and is used for calculating flow data of fluid in the conduit. According to the invention, high-fidelity and continuous measurement of the flow of the high-frequency pulsating fluid can be realized, and the measurement precision is ensured.

To provide a highly efficient narrow groove two-electrode large heat input submerged arc welding method which can obtain a sound weld part having no high-temperature cracking and weld defects, prevents generation of a pop mark and a projection, and can obtain excellent welding workability and excellent mechanical properties of weld metal.SOLUTION: A narrow groove two-electrode large heat input submerged arc welding method of single pass per layer brings a backing material into contact with a rear face of a narrow groove having plate thickness of 60 mm or more, a chevron type or a V shape, a groove angle of 16 to 20°, and a root gap of 4 to 10 mm, and then performs submerged arc welding of single pass per layer so that the total of heat inputs of a preceding electrode and a succeeding electrode for each path is 200 to 490 kJ / cm, using a sintered type flux containing the total of SiO2 and CaO conversion values and the total of MgO of 30 to 40%, 4 to 10% TiO2, 16 to 26% Al2O3, 1 to 5% ZrO2, the total of CaF2, B2O3, Si and Al of 1.5 to 5.5%, the total of an Li2O conversion value of 0.5 to 2.0%, 15 to 25% Fe, and the total of Mn, Ni and Mo of 3.5 to 7.5%.SELECTED DRAWING: Figure 1

This invention relates to a g-C3N4@NiS composite photoelectrocatalyst and its preparation and application. The catalyst has a flower-like hierarchical porous structure, composed of g-C3N4 nanospheres and NiS nanoparticles supported thereon. The g-C3N4 nanospheres are assembled from stacked nanosheet layers. The NiS nanoparticles and g-C3N4 nanospheres form an in-situ covalently bonded heterojunction through Ni-S and Ni-N bonds, constructing a p-n heterostructure. The preparation method involves mixing melamine, glucose, CTAC, nickel acetate, and thiourea, and simultaneously achieving the condensation polymerization of g-C3N4 and the growth of NiS using a low-temperature one-pot hydrothermal method. Under alkaline conditions, the HER overpotential of this catalyst is only -2 mV at 10 mA cm⁻¹. ‑2 The overpotential of OER is 270 mV at 10 mA cm⁻¹. ‑2 In the dual-electrode total water splitting system, only 2.4 V is required to achieve 20 mA cm⁻¹. ‑2 It achieves a high current density and operates stably for over 24 hours, exhibiting excellent catalytic activity and stability in seawater. This invention boasts advantages such as a simple synthesis process, strong interfacial coupling, superior catalytic performance, and resistance to seawater corrosion.

This invention relates to a bipolar plate assembly for a PEM electrolyzer and its manufacturing process. The PEM electrolyzer bipolar plate assembly includes: a bipolar plate; the bipolar plate includes a metal electrode plate and a first sealing ring; the metal electrode plate is provided with a flow channel, a first annular sealing groove, an oxygen inlet, a water inlet, and a hydrogen inlet; the first sealing ring is adapted to the shape and size of the first annular sealing groove and is integrally vulcanized with the metal electrode plate; two titanium felts and two titanium meshes; the bipolar plate, two titanium felts, and two titanium meshes are sintered into a single assembly, and the arrangement from top to bottom is: titanium felt - titanium mesh - bipolar plate - titanium mesh - titanium felt. This invention improves the flatness of the titanium felt / mesh surface and the accuracy of positioning during assembly by sintering the titanium mesh, titanium felt, and bipolar plate together, thereby improving assembly quality and production efficiency, while also reducing energy consumption during water electrolysis.

The invention belongs to the technical field of oil-water separation, and provides an oil-water separation membrane for oilfield fracturing flow-back fluid and a preparation method of the oil-water separation membrane. The preparation method comprises the following steps: by taking a red copper plate as an anode and a copper mesh as a cathode, carrying out electrochemical deposition in an electrolyte solution by adopting a dual-electrode system to obtain the copper mesh with deposited copper particles; soaking the copper mesh deposited with the copper particles in an alkaline oxidation solution to obtain an oil-water separation membrane; the alkaline oxidation solution is a mixed solution of NaOH, (NH4) 2S2O8 and water. The preparation method is simple, convenient and efficient, the small-size milky oil-water separation membrane is rapidly prepared through an electrochemical deposition and alkali-assisted oxidation two-step method, and the small-size milky oil-water separation membrane has excellent oil-water separation efficiency, high permeation flux and excellent stability.

The invention discloses an echelon utilization lithium ion battery pack capable of losslessly replacing internal batteries. The echelon utilization lithium ion battery pack comprises a battery pack shell, a top cover, a battery limiting plate, a first electric connecting plate, a second electric connecting plate and an air duct structure, the battery limiting plates sleeve the single battery cells and are bonded with the inner wall of the shell through heat-conducting glue to limit the horizontal displacement of the battery cells; the first electric connecting plate and the second electric connecting plate are respectively propped against two ends of the battery cell and are matched with two types of battery cells, namely single-end single-electrode and single-end double-electrode; air ducts are arranged on the top cover and the bottom plate of the shell and matched with ventilation holes of the electric connecting plate and the limiting plate, and forced convection heat dissipation is achieved under the action of the exhaust device. According to the invention, the failed battery cell can be replaced without damage, the echelon utilization value is improved, the battery cell is compatible with various types, the heat dissipation is efficient, and the adaptability is strong.

The invention discloses a nerve monitoring condensable and cuttable electrode and an electrocoagulation operation system. The nerve monitoring condensable and cuttable electrode comprises a handle shell, a condensable and cuttable high-frequency operation electrode assembly, a nerve detection electrode assembly and a driving control mechanism, wherein the condensable and cuttable high-frequency operation electrode assembly and the nerve detection electrode assembly are arranged in the handle shell. The driving control mechanism comprises an external operation part and an internal transmission assembly, and the external operation part is in transmission connection with the two electrode assemblies through the internal transmission assembly. When the external operating part moves towards a first direction, the high-frequency operation electrode assembly is driven to extend out and the nerve detection electrode assembly is synchronously driven to retract; otherwise, the nerve detection electrode assembly is driven to stretch out, and the high-frequency operation electrode assembly is synchronously driven to retract. Reverse linkage and physical mutual exclusion of the two electrodes are achieved through the internal transmission assembly, it is ensured that only one functional head is located at the working position at the same time, and the risk that due to the fact that the two electrodes stretch out at the same time, mutual interference of different energies and accidental touch of non-target tissue are possibly caused in the operation process is avoided.

A two-electrode submerged arc welding method capable of improving the quality of welded joints is provided. [Solution] A two-electrode submerged arc welding method includes distributing a cut wire within a groove of a base material (2), outputting current from a power source via a leading electrode (3) to energize a leading welding wire (4) and generating an arc (A) between the base material (2) and the leading welding wire (4) within the groove, and energizing a trailing electrode (6) from the power source to supply a heated filler wire (7) to a molten pool (P) formed behind the arc (A) while welding is proceeding, without generating an arc, wherein the leading electrode (3) is inclined toward the welding direction (X) at a predetermined sweepback angle (θ) with respect to an axis (Z) perpendicular to the welding direction (X) and the base material (2).

The invention belongs to the technical field of uric acid detection, and relates to a preparation method and application of a uric acid and pH dual-electrode detection sensor. The preparation method comprises the following steps: mixing a soluble manganese salt with a complexing agent, adding a soluble hexacyanoferrate solution, aging and standing at room temperature, centrifuging, drying, and pyrolyzing at high temperature to obtain the Mn2O3 / Fe2O3 material. Coating on the surface of a first working electrode, and then continuously dropwise adding a mixed solution containing a cross-linking agent and urate oxidase; and uniformly mixing a chloroauric acid solution with a hydrochloric acid solution and an aniline solution with a hydrochloric acid solution, carrying out electro-deposition on a second working electrode, and drying at low temperature to obtain the sensor. The sensor designed based on the double working electrodes shows excellent stability, reproducibility and anti-interference performance in sweat uric acid monitoring. The sensor can realize rapid identification and dynamic response of uric acid in a real sweat sample, and is expected to be used for integration of wearable equipment to realize continuous gout early warning.

The invention relates to the field of wastewater treatment, and discloses a biological treatment process for sodium hydrosulfide production high-sulfur wastewater, which comprises the following steps: S1, culturing and activating active bacteria; s2, pretreating high-sulfur wastewater generated in the production process of sodium hydrosulfide; s3, introducing the wastewater into a multi-stage microbial battery reaction system; s4, dynamically regulating and controlling a microbial metabolism path in the multi-stage reaction system by arranging an intelligent bio-membrane reactor; s5, passing through a dual-electrode system and a tail end filtering device of a by-product control system; and S6, recovering electric energy generated in the microbial battery reaction system through an energy recovery system. Through a multi-stage microbial battery series connection structure, a continuous reaction path from high-concentration degradation to terminal deep purification is formed, the technical effects of keeping stable reaction efficiency and low residual rate under the condition of treating sulfides with different concentrations are achieved, and the problems that degradation capability is easy to attenuate and tail water fluctuates severely in a later treatment stage are solved.

The invention discloses a flexible bioelectric surface dry electrode based on a magnetic tunnel junction and a preparation method of the flexible bioelectric surface dry electrode. The flexible bioelectric body surface dry electrode comprises a flexible substrate, and a bottom electrode lead, an insulating layer, a discrete conductive island array, an MTJ spinning electron functional layer, a microneedle biological contact layer, an interface leveling insulating layer, a confluence top electrode and a top electrode lead which are arranged in sequence. A conductive island array and top-bottom dual-electrode collaborative design is adopted: a conductive island focuses a weak bioelectric signal on a body surface, so that the weak bioelectric signal vertically passes through an MTJ functional layer, magnetic moment deflection is driven by an Oersted field excited by a bioelectric current, and in-situ amplification of the signal is realized by using an MTJ tunneling magnetoresistance effect. In combination with the low-impedance contact characteristic of the microneedle, the electrode effectively reduces motion artifacts, breaks through the bottlenecks of signal attenuation and dependence on an external amplification circuit of a traditional dry electrode, has high sensitivity, high signal-to-noise ratio and wearing comfort, and is suitable for the fields of electroencephalogram and electrocardio acquisition and wearable health monitoring.

The application discloses a nerve monitoring coagulation and incision electrode and an electrocoagulation operation system. The nerve monitoring coagulation and incision electrode comprises a handle shell, a coagulation and incision high-frequency operation electrode assembly and a nerve detection electrode assembly arranged in the handle shell, and a driving control mechanism. The driving control mechanism comprises external operating parts and an internal transmission assembly. The external operating parts are respectively in transmission connection with the two electrode assemblies through the internal transmission assembly. When the external operating parts move in a first direction, the high-frequency operation electrode assembly is driven to extend and the nerve detection electrode assembly is synchronously driven to retract. Conversely, the nerve detection electrode assembly is driven to extend and the high-frequency operation electrode assembly is synchronously driven to retract. The application realizes reverse linkage and physical mutual exclusion of the two electrodes through the internal transmission assembly, ensures that only one functional head is in a working position at the same time, and avoids the risk of possible mutual interference of different energies and mis-touching of non-target tissues in the operation process caused by the extension of the two electrodes at the same time.

The application provides an active material, a preparation method thereof, a lithium ion battery and a preparation method thereof. The active material comprises an inner core and a coating layer coated on at least part of the surface of the inner core; wherein the inner core comprises lithium vanadium phosphate, and the coating layer comprises a solid electrolyte material. In the lithium ion battery, a double-electrode lithium ion battery is constructed by taking lithium vanadium phosphate as the inner core of the active material, so that the lithium ion battery has good safety; and by coating the coating layer comprising the solid electrolyte material on the surface of the inner core of the active material, the electrochemical performance of the double-electrode lithium ion battery is improved.

The invention discloses a double-electrode high-precision synchronous rotation movement mechanism for rotary printing electrolytic machining, and relates to the technical field of electrolytic machining, the double-electrode high-precision synchronous rotation movement mechanism comprises an anode main shaft assembly, a cathode main shaft assembly and an electrolyte isolation assembly, comprising an inner and outer wall rotary printing electrolytic machining method and a'guiding-following 'control strategy of a main shaft; the main shaft assembly comprises a thrust centripetal cylindrical roller bearing, a deep groove ball bearing, a hollow stepped main shaft, a coupler, an absolute encoder, a direct drive motor and the like. The direct-drive motor is directly coupled to drive the main shaft, so that an intermediate transmission link is omitted, and mechanical errors are reduced; the spindle phase is fed back in real time based on an absolute encoder; a'guiding-following 'control strategy is adopted, high-precision synchronous contra-rotation of the cathode spindle and the anode spindle is achieved, reversing rotation can be achieved in the high-precision synchronization process, and the rotary printing electrolytic machining device is suitable for rotary printing electrolytic machining of the outer wall and the inner wall of a large thin-wall rotary body part.

The application belongs to the technical field of environmental electrocatalytic electrode preparation, and particularly relates to a preparation method of a magnetic spinel adsorption electrode and application thereof. The specific preparation steps are as follows: 1) dispersing the magnetic spinel catalyst in an electrolyte to form a suspension system; 2) constructing a double-electrode electrochemical system in the suspension system by taking foamed nickel as a cathode; and 3) stirring the suspension system, performing electrolysis reaction, and obtaining the magnetic spinel adsorption electrode after drying. The prepared adsorption electrode does not need to add an additional binder to realize the fixation of the magnetic spinel catalyst on the foamed nickel substrate, overcomes the problem of sharp reduction of the number of active sites and conductivity caused by the binder, and greatly improves the electrode catalytic degradation capacity. In addition, the preparation method does not need to consume additional binders and organic solvents, can effectively reduce the synthesis cost of the spinel electrode and reduce the discharge of waste liquid, and is an environmentally friendly catalyst synthesis method.

The invention provides a driver with bidirectional reversible deformation and liquid-solid friction nanometer power generation functions and a preparation method thereof, and belongs to the technical field of drivers. The preparation method comprises the following steps: doping a CNTs-MXene mixed solution into polydimethylsiloxane (PDMS) to prepare a composite film, depositing an Al film by using a magnetron sputtering technology, and carrying out ultraviolet surface modification treatment on a PDMS-CNTs-MXene layer to form a SiOx layer. Due to the fact that the expansion coefficients of the PDMS-CNTs-MXene layer, the SiOx layer and the Al layer are greatly different, solvent-driven response can be achieved. Wherein the SiOx layer is swelled in the organic solvent due to hydrogen-bond interaction and solvation effect, and the PDMS-CNTs-MXene layer is swelled in the organic solvent due to non-polar permeation, so that bidirectional reversible deformation in the organic solvent can be realized. Due to the multi-layer composite structure and the dual-electrode design, the Al / PDMS-CNTs-MXene / SiOx driver also has efficient friction nanometer power generation performance.

The utility model relates to a kind of double electrode temperature compensation cooking equipment, including base and the panel for placing cookware, panel covers on base, base is built-in processing module, heating furnace tray, at least one capacitance detection module is equipped in the furnace tray interior space of heating furnace tray, each capacitance detection module has the detection electrode for sensing cookware, wherein at least one capacitance detection module is equipped with reference electrode for sensing the temperature around detection electrode, the distance of reference electrode top surface from panel is less than the distance of detection electrode top surface from panel to form height difference;Capacitance digital conversion circuit is built-in in base, capacitance digital conversion circuit is respectively coupled each electrode, for obtaining the single-end self-capacitance of each detection electrode and reference electrode or the differential self-capacitance of detection electrode and reference electrode formed;Processing module is coupled capacitance digital conversion circuit, for the detection signal of outputting whether there is cookware on double electrode temperature compensation cooking equipment according to the differential result of the self-capacitance of detection electrode and reference electrode.

The invention discloses a tool bending deformation testing device, belongs to the technical field of machining detection, and is used for solving the problems that an existing tool bending deformation measuring method is low in efficiency and poor in synchronism. The device comprises a rotary driving module, a tool nose clamp module, a conductive detection module and a control module, the rotary driving module is provided with a tool handle insertion port and a first angle encoder, the tool nose clamp module is provided with a tool nose insertion port and a second angle encoder, and the bottom surface of the tool nose clamp module is provided with a conductive contact surface and is slidably mounted on an insulating guide rail; the conductive detection module comprises a pair of conductive electrodes laid below the insulated guide rail, and a conductive contact surface is in contact with the double electrodes in an initial state to form a closed-loop circuit; when the tool nose is bent to cause the clamp to break away from the insulated guide rail, the circuit is disconnected, and the control module synchronously records angle data of the two encoders and calculates a permanent deformation angle gamma = alpha + beta. The device realizes rapid and accurate measurement of bending deformation of the cutter through electromechanical combination, and is mainly used for quality detection and service life evaluation of the industrial cutter.

The invention discloses a method for activating an original phage based on a low-voltage electrochemical technology. The method comprises the following steps: performing low-voltage electrolysis on a bacterial electrolyte containing the original bacteriophage by adopting a double-electrode system, performing electrolytic treatment, culturing a solution after reaction in a culture solution, sequentially performing cell disruption, centrifugal precipitation, supernatant filtration and bacteriophage extraction, and detecting the number of bacteriophages generated after the original bacteriophage is activated by adopting a double-layer plate method. The method has the characteristics of simplicity in operation, low energy consumption and environmental friendliness by efficiently producing the active free radical to activate the prophage.

The invention discloses a method for prolonging the storage time of thick slurry, which comprises the following steps: step A: preparing cold plasma activated water which is prepared by a dual-electrode dielectric barrier discharge device, pure water is used as a matrix, the air flow of the dual-electrode dielectric barrier discharge device is 5-8 L / min, and the treatment time is 45-90 s; b, cold plasma activated water and tobacco raw materials are mixed to obtain a liquid material, the liquid material and the powder material are mixed to obtain thick paste, and the total bacterial count of the thick paste is lower than 10 < 6 > CFU / g when the thick paste is stored for 0-8 h. Cold plasma activated water is introduced, the thick slurry is sterilized, the storage time is prolonged, and the production efficiency of reconstituted tobacco sheets through the thick slurry method is further improved.

A method for denitrifying ammonia nitrogen wastewater containing chlorine-oxygen free radicals is disclosed. The method uses ruthenium dioxide / titanium dioxide (RuO2 / Ti) as the anode and mesoporous carbon-modified carbon paper (CMK-3 / CP) as the cathode. Sodium sulfate, sodium chloride, and iron-modified graphene oxide as the particle electrode are added to the container containing ammonia nitrogen wastewater, forming a dual-electrode and particle-electrode electrochemical ammonia nitrogen denitrification system. Oxygen is then introduced into the cathode region, and the electrolysis current density is controlled to achieve denitrification of the ammonia nitrogen wastewater. This invention utilizes RuO2 / Ti to oxidize chloride ions to active chlorine (ClO2). ‑ Simultaneously, oxygen is reduced to hydrogen peroxide through mesoporous carbon-modified carbon paper, and the generated active chlorine and hydrogen peroxide are enriched in iron-modified graphene oxide particles. The hydrogen peroxide is further absorbed by the Fe atoms in the iron-modified graphene oxide particles. 2+ / Fe 3+ The cyclic catalytic process generates HO•, which can react with active chlorine to generate ClO•. ClO• can selectively oxidize ammonia nitrogen to nitrogen gas, generating high steady-state concentrations of chloroxygen free radicals, thus achieving efficient denitrification treatment of ammonia nitrogen wastewater.

The utility model relates to a dual-electrode ablation head. The dual-electrode ablation head comprises a first electrode net, a second electrode net, a first driving mechanism and a second driving mechanism, wherein the first electrode net and the second electrode net are arranged on the pipeline assembly, and the pipeline assembly is connected with the first driving mechanism and the second driving mechanism; the first driving mechanism is provided with a shifting button, and contraction and expansion of the first electrode net are achieved by pushing and pulling the shifting button; the second driving mechanism is provided with a screwing assembly, and contraction and expansion of the second electrode net are achieved by rotating and operating the screwing assembly. The device is simple in structure and convenient to operate, ablation of air channels of different sizes is achieved, and the ablation efficiency is high.