19results about How to "Reduce passivation" patented technology

The invention discloses a pulse electrochemical crystallization coupled composite constructed wetland system which comprises an energy system, a pulse electrochemical crystallization pond and a composite constructed wetland system, and the energy system supplies energy to the pulse electrochemical crystallization pond and the composite constructed wetland system. Aquaculture wastewater firstly enters a pulse electrochemical crystallization pond, struvite (MAP) sediment is formed through electrochemical crystallization, ammonia nitrogen and phosphate in the wastewater are efficiently removed, and partial removal of organic matter is achieved. Then the wastewater enters a composite artificial wetland system, and the wastewater is deeply purified under the action of filler filtration / adsorption, microbial assimilation / conversion and plant absorption. The pulse electrochemical crystallization coupled composite constructed wetland system is compact in structure, and the defects of high energy consumption of direct-current electrochemical crystallization and low purification efficiency of a traditional constructed wetland are overcome through physical-chemical-biological multi-path coupling enhanced culture wastewater treatment.

The invention discloses a magnesium / alkali metal hybrid battery containing a layered MnO2 positive electrode material, which comprises a positive pole piece, a negative pole piece and a magnesium / alkali metal double-salt electrolyte, the positive pole piece comprises the layered MnO2 positive electrode material, the negative pole piece comprises the layered MnO2 positive electrode material, and the magnesium / alkali metal double-salt electrolyte comprises the layered MnO2 negative electrode material. The negative pole piece is pure magnesium metal, and the electrolyte is magnesium / alkali metal double-salt electrolyte. The invention also provides a preparation method of the magnesium / alkali metal hybrid battery containing the layered MnO2 positive electrode material. The high-magnesium / alkali metal hybrid battery provided by the invention has a high voltage window; compared with the prior art, the layered manganese dioxide positive electrode material has the advantages that dendritic crystals are not easily generated on the magnesium negative electrode side, meanwhile, the advantage of high ion migration rate of alkali metal ions in the positive electrode material is achieved, the electrochemical performance of the layered manganese dioxide positive electrode material in a high-voltage magnesium-based hybrid battery is improved, and the layered manganese dioxide positive electrode material is a low-cost and high-safety novel secondary battery system.

The invention discloses a magnesium ion-containing water-alcohol mixed electrolyte and application, the electrolyte comprises a solvent, magnesium salt and an additive, the solvent is a mixed solvent of water and alcohol organic matters, the additive is water-soluble carboxylic acid, and the volume molar concentration of the additive is 0.01-2 mol / L. The electrolyte has a wide electrochemical stability window and high ionic conductivity, the adopted raw materials are safe and easy to obtain, the preparation method is simple, the cost is low, and large-scale batch production is facilitated. The electrolyte is applied to a secondary battery containing magnesium ions.

The present invention relates to the field of electrochemical materials, and in particular to a method for synchronously and continuously preparing a lithium iron phosphate precursor and hydrogen and its application. The preparation method uses iron metal as a working electrode and a hydrogen evolution reaction counter electrode material as a counter electrode, and electrolysis occurs in an acidic electrolyte or a neutral electrolyte to prepare hydrogen and a lithium iron phosphate precursor. The method has the advantages of low cost, high safety, good cycle performance, good reaction sustainability, and high yield.

The invention discloses a magnesium-doped calcium carbonate adsorbent and a preparation method and application thereof, the chemical formula of magnesium-doped calcium carbonate is as shown in the following formula (1): MgxCa1-x (CO3), x represents the molar ratio of magnesium to calcium, 0 lt; xlt; and 0.200%. Compared with pure calcium carbonate, the adsorption rate of the adsorbent based on the magnesium-doped calcium carbonate material provided by the invention is greatly improved, so that passivation of the pure calcium carbonate in the early stage of adsorption is relieved. Under the condition of the same phosphorus adsorption amount, the adsorption rate of the adsorbent is obviously improved. Alternatively, under the same adsorption time, the phosphorus adsorption amount of the adsorbent provided by the invention is obviously improved. The adsorbent provided by the invention has good adsorption selectivity (competitive ion interference resistance), so that the adsorbent has high practical application value. In addition, as the preparation is simple and convenient and the cost is low, the compound can be used as an agricultural fertilizer slow-release agent, can maintain the phosphorus content in farmland for a long time, and is more beneficial to the growth of crops.

The utility model discloses a high sharpness injection needle, including needle tube and needle tip, the needle tip adopts three -stage tapering type multi -edge surface structure, and this three -stage tapering type multi -edge surface structure is composed of main cutting part, transition part and micro blade part, the main cutting part includes three symmetrical distribution's first inclined plane, and every first inclined plane bifurcates two second inclined planes to form transition part, and every second inclined plane bifurcates two third inclined planes to form micro blade part, the needle tip surface is equipped with a plurality of micro -groove, and the third inclined plane intersection of on micro blade part forms nanometer -class blade edge, and this blade edge edge is equipped with periodic micro sawtooth. The utility model discloses a needle tip is three -stage tapering type multi -edge surface structure, and the puncture resistance is reduced in stages, and the pain feeling is reduced, sets up micro sawtooth and can reduce the tissue contact area through " point cutting", and the local stress concentration when puncturing, and then delay passivation, sets up micro -groove and can guide the tissue fluid flow, destroys the negative pressure adsorption effect, and improves the needle insertion smoothness.

The invention relates to the technical field of wet-process phosphoric acid, and particularly discloses a method for preparing semi-hydrated gypsum by desulfurization and acid return, which comprises the following steps: S1, adding phosphorite into intermediate acid in the production process of semi-hydrated wet-process phosphoric acid for desulfurization treatment to obtain desulfurized slurry, cooling the slurry, and aging to obtain bottom ore pulp and top overflow desulfurized phosphoric acid; and S2, part of the desulfurized phosphoric acid obtained in the S1 returns to a semi-hydrated wet-process phosphoric acid reaction tank to fully react with phosphorite, then excessive sulfuric acid is added for reaction, and finally solid-liquid separation is performed to obtain semi-hydrated intermediate acid and semi-hydrated gypsum. According to the method disclosed by the invention, the desulfurized intermediate acid is used for decomposing the phosphate ore, so that the phenomenon of phosphate ore passivation easily caused by too high concentration of liquid-phase sulfate radicals in the semi-hydrated process is reduced, the phosphate ore acidolysis is more complete, the decomposition efficiency is higher, and the yield of phosphorus can be improved.

The utility model relates to the technical field of meat processing, and discloses a pig bone chopping device which comprises a processing table, the top of the rear wall face of the processing table is fixedly connected with a rear wall, and the front wall face of the rear wall is fixedly connected with a connecting plate; the top of the cutter is arranged at the bottom of the connecting plate, a hydraulic rod is fixedly connected to the top of the cutter, the top of the hydraulic rod is fixedly connected with the bottom of the connecting plate, and the bottom of the hydraulic rod is fixedly connected with the top of the cutter; the roller frame is fixedly connected to the top of the machining table, the wall face of the roller frame is rotationally connected with a transmission roller, and the wall face of the transmission roller is in transmission connection with a transmission belt; and the sectioning structure is arranged at the bottom of the connecting plate and used for sectioning the main rib on the top of the transmission belt, the sectioning structure comprises a pressing plate and pressing rollers, the pressing plate is movably connected to the bottom of the connecting plate, the pressing rollers are rotationally connected to the bottom of the pressing plate, and the multiple pressing rollers are arranged on a bottom plate of the pressing plate.

The present invention discloses a method for repairing soil contaminated by electrolytic manganese slag by inoculating white rot fungi, comprising the following steps: mixing biomass and soil contaminated by electrolytic manganese slag to obtain compost raw materials; inoculating white rot fungi in the compost raw materials to obtain a pile; composting and fermenting the pile to obtain compost mature material, thereby completing the repair of soil contaminated by electrolytic manganese slag. The present invention effectively reduces the leaching amount of heavy metal manganese by inoculating white rot fungi, effectively reduces the mobility and bioavailability of heavy metal manganese, effectively changes the structure of microbial communities, increases the number and diversity of microorganisms, improves the seed germination index, and realizes the repair of soil in contaminated sites. It has the advantages of quickly starting composting repair, effectively reducing the leaching amount of heavy metal manganese, reducing the mobility and bioavailability of heavy metal manganese, increasing microbial diversity and community abundance, and improving the seed germination index.

This invention relates to the field of water treatment technology, and more particularly to a method and system for treating coking nanofiltration concentrate. The method includes: pre-configuring a modified nickel plate anode electrode, a modified titanium plate cathode electrode, and multi-media filter media according to the water quality characteristics of the coking nanofiltration concentrate; feeding the coking nanofiltration concentrate into an electrocatalytic oxidation device for treatment, wherein the electrocatalytic oxidation device uses the modified nickel plate anode electrode as the anode electrode and the modified titanium plate cathode electrode as the cathode electrode; and pumping the effluent from the electrocatalytic oxidation device into a multi-media filter for filtration, wherein the multi-media filter contains multi-media filter media. By first subjecting the coking nanofiltration concentrate to electrocatalytic oxidation treatment, Cl... ‑ The anode loses electrons and is oxidized, producing a large number of active chlorine and other free radicals, which can rapidly degrade ammonia nitrogen. This allows relatively stable substances to react, and then a multi-media filter is used for filtration, which can economically and efficiently remove COD and ammonia nitrogen from coking nanofiltration concentrate.

This invention relates to the field of metal sheet processing technology and discloses a steel plate shearing device, including a frame and an upper blade beam. A support platform is fixedly installed on the inner wall of the frame, and a positioning cylinder is provided in the support platform. The upper blade beam is slidably connected in the positioning cylinder, and an installation groove is opened in the upper blade beam, in which an upper blade is installed. A lower blade holder and a drive mechanism are also fixedly installed on the frame, and a lower blade is provided in the lower blade holder. A guard plate is hinged to both sides of the upper blade beam by an elastic element, and a grinding roller is rotatably installed on the end of the guard plate near the lower blade holder. A first air bladder is installed in the positioning cylinder, and an expansion element is provided in the upper blade beam. The first air bladder and the expansion element are connected by an air pipe. The upper blade beam descends and compresses the first air bladder, and the air pressure is transmitted to the second air bladder in the upper blade beam through the air pipe. This drives the wedge block mechanism to force the guard plate to flip outward, so that the grinding roller automatically moves away from the cutting edge at the moment of shearing to avoid interference. During the return stroke, it automatically resets and sticks to the blade surface for micro-grinding, realizing online uninterrupted grinding.

The invention discloses a method for preparing lead oxide powder containing barium element by using alloy lead, and belongs to the technical field of lead storage battery production. The invention prepares PbO powder containing barium element by preparing lead-barium alloy and using the alloy through process control. By using the powder and paste, the lead powder has very good dispersion performance, is not easy to agglomerate, and the battery batch consistency is very ideal. At the same time, the introduction of barium element is realized. Moreover, the barium element introduced in this way is not easy to separate from the active material during the cycle because it is embedded in the PbO crystal structure, which delays the passivation process of the negative electrode. During the entire life, the initial low temperature performance of the battery and the low temperature retention ability during the cycle can be improved.

The application discloses a preparation method of functionalized iron oxide nanoparticles. Firstly, the interlayer distance of graphite is increased under the action of a bicarbonate ammonia dispersant through high-energy ball milling treatment, and bismuth trisulfide which can inhibit hydrogen evolution is uniformly loaded on the graphite powder through the ball milling effect; then, the formed iron oxide and bismuth trisulfide are fully mixed through an in-situ deposition method; after further high-energy ball milling treatment to form uniform particles, the particles are subjected to hydrothermal treatment together with carbon nanotubes, so that the carbon nanotubes and the graphite and iron oxide particles form an interwoven network structure, a large amount of space is provided in the electrode, and the interlayer structure of the graphite also fully weakens the passivation phenomenon of the iron electrode. When the functionalized iron oxide nanoparticles are applied to an iron-air battery, the main problems existing in the iron-air battery can be solved in a targeted manner, and the application has important practical significance.

The invention discloses a Goctor-based point cloud filtering algorithm. The algorithm comprises the steps that a Goctor collects the number of three-dimensional point clouds on the surface of an object to be measured; calculating a neighborhood set of each frame of point cloud, and removing point cloud outliers by taking the calculated neighborhood set as a reference; calculating the curvature, the normal vector and the feature distance of each point in each frame of point cloud by taking the point cloud from which the outliers are removed as a reference; 3, taking the curvature, the normal vector and the characteristic distance calculated in the step 3 as references, introducing a weight calculation formula, substituting the calculated weight into a guided filtering cost formula, and performing guided filtering after weight distribution on each frame of point cloud; according to the method, the problems of excessive smoothness and the like caused by fixed filtering parameters are solved, point cloud data are smoothed, sharp features of an object are reserved, the point cloud data are closer to the original state of the object, and the acquisition precision and efficiency are greatly improved.

The invention relates to a solar cell and a preparation method thereof. The solar cell comprises a monocrystalline silicon substrate of a first doping type; the first intrinsic amorphous silicon layer, the first doping material layer of the second doping type, the first transparent conducting layer and the first electrode are sequentially arranged on the first side of the monocrystalline silicon substrate, and the first doping material layer is provided with a third side connected to the first intrinsic amorphous silicon layer and a fourth side connected to the first transparent conducting layer; the second intrinsic amorphous silicon layer, the second doping material layer of the first doping type, the second transparent conductive layer and the second electrode are sequentially arranged on the second side of the monocrystalline silicon substrate. The crystal grain size of the fourth side is small, the crystallinity is high, the effective doping concentration of the fourth side can be improved, the effective doping concentration of the fourth side can be higher, the contact resistance can be reduced, the filling factor can be improved, and the open-circuit voltage loss can be reduced.

The invention relates to the technical field of metal separation and recovery, in particular to a precious metal separation and recovery device which comprises an electrolytic cell, an anode assembly and a cathode assembly, the rack is assembled at the top of the electrolytic bath, the cathode assembly comprises a cathode part rotationally mounted on the rack, the cathode part is of a cylindrical structure, the outer wall of the cathode part and the electrolyte are kept chemically stable, the inner wall of the cathode part is made of a cathode material, and the interior of the cathode part is communicated with the electrolytic mixed solution in the electrolytic bath; the main shaft is rotatably and telescopically arranged on the rack, the main shaft is located in the cathode part and is coaxial with the cathode part, an auger blade is integrally formed on the outer wall of the main shaft, and the outer wall of the auger blade is tightly attached to the inner wall of the cathode part; and when the auger blades rotate, recycling objects deposited on the inner wall of the cathode part can be scraped and conveyed downwards, the deposition objects on the inner surface of the cathode part can be scraped, cleaned and forcibly conveyed, and the passivation phenomenon is avoided.

The invention relates to the technical field of solar cells, and discloses a grid line structure for a solar cell, a manufacturing method of the grid line structure and the solar cell. The grid line structure comprises a non-contact channel induction electrode and a plurality of contact auxiliary grids which are distributed at intervals, the contact type auxiliary grids and the non-contact type channel induction electrodes are alternately arranged and are parallel to each other, so that the contact type auxiliary grids and the non-contact type channel induction electrodes are not in contact with each other, and / or each contact type auxiliary grid is in cross electric contact with the corresponding non-contact type channel induction electrode; the contact type auxiliary grid penetrates through the passivation layer and then makes ohmic contact with the silicon substrate, and the non-contact type channel induction electrode makes contact with the surface, away from the silicon substrate, of the passivation layer so that potential difference can be formed between the non-contact type channel induction electrode and the surface of the silicon substrate. The surface sheet resistance, the grid line resistance and the surface field effect passivation effect are optimized by optimizing the grid line structure, the carrier transverse transmission loss is reduced, Auger recombination of high-concentration doping is avoided, the filling factor, the open-circuit voltage and the conversion efficiency of the cell are improved, the working procedure is simplified, and the cost is reduced.

The application discloses a composite seed for inducing target ion reaction in water and a preparation method and application thereof, and belongs to the technical field of water treatment. The preparation method of the composite seed is as follows: target cations and target anions are selected according to target ions to be reacted; a porous carrier is soaked in a first solution containing the target cations; a second solution containing the target anions is added dropwise under stirring, and the dropping speed is controlled to make the supersaturation degree of the system lower than the critical supersaturation degree of homogeneous nucleation, so as to force the target cations and the target anions to react on the inner surface of the pores of the carrier, generate nanocrystal nuclei in situ and grow; and the composite seed is obtained through aging, solid-liquid separation, washing and drying. The nanocrystal nuclei have the same crystal structure as the composition of the target ions to be reacted. Through the in-situ loading process, the nanocrystal nuclei are firmly loaded in the pores of the porous carrier, and the target crystal nucleus design is combined, so that the reaction efficiency of the fluidized bed is remarkably improved, the activity of the crystal nucleus is long-lasting, and the composite seed has a good industrial application prospect.

The invention discloses a well structure and an injection method for injecting a suspended-state repairing agent. The well structure comprises an injection well, a lower-end injection pipeline and an upper-end injection pipeline. Wherein the lower end injection pipeline downwards penetrates into the injection well from the top of the injection well; the upper end injection pipeline is arranged on the side wall of one side of the top of the injection well; and a Y-shaped tee joint is arranged at the bottom of the lower end injection pipeline. By adopting the well structure, the migration and distribution uniformity of the suspended state repairing agent is remarkably improved, the reaction efficiency with pollutants is enhanced, meanwhile, the repairing cost is reduced, the construction period is shortened, and the repairing quality is ensured. And meanwhile, the problem that a suspended-state repairing agent is difficult to inject when the repairing depth exceeds the injection range or the repairing medium is bed rock in a traditional injection method is solved.