241 results about "Nickel ions" patented technology

The invention discloses a nickel-containing etching wastewater treatment process, which belongs to the technical field of environmental protection, and comprises a raw water regulating tank, a pH pre-regulating tank, a heterogeneous catalytic oxidation tower, a neutralization coagulation tank, an inclined tube sedimentation tank and a clean water tank which are connected in sequence. According to the process, under the neutral condition, a catalyst loaded with cobalt manganese oxide is used for activating sodium hydrogen persulfate, high-activity sulfate free radicals are generated, a Ni-EDTA complex structure is fractured in a targeted mode, free nickel ions are released in situ, organic ligands are synchronously mineralized, and the adding amount of sodium hydrogen persulfate is dynamically adjusted through a clean water pool closed-loop control system; and high-purity nickel hydroxide precipitate is generated through alkaline precipitation and coagulation, so that efficient solid-liquid separation is realized. The treatment process disclosed by the invention is compact in flow and stable in operation, effectively solves the problems of difficult complex breaking, low nickel removal efficiency, high sludge toxicity, difficult resource recovery and the like when the EDTA complex nickel wastewater is treated by a traditional method, realizes closed-loop recovery of nickel resources, and has the remarkable advantages of low cost, high efficiency and environmental friendliness.

The invention relates to a preparation method of a nickel ion doped modified ferric sodium pyrophosphate positive electrode material, and belongs to the technical field of sodium ion battery positive electrode materials. The nickel ion doped modified ferric sodium pyrophosphate positive electrode material is prepared by adopting an integrated process system of liquid phase uniform mixing, spray granulation and precise segmented calcination. According to the process system, atomic-scale uniform doping of nickel ions and a specific microstructure of a precursor are realized through spray drying, and a plurality of inherent key technical problems of low electronic conductivity, low ion diffusion rate, impurity phase generation and the like of an NFPP material are solved together through a synergistic effect with a subsequent calcining process; furthermore, the discharge capacity of the ferric sodium phosphate pyrophosphate composite material at high rate is improved, so that the battery has relatively high cycling stability.

The invention belongs to the technical field of conductive microsphere preparation, and particularly relates to a surface-roughened nickel-plated conductive microsphere and a preparation method and application thereof. The preparation method comprises the following steps: carrying out pretreatment to enable the surfaces of the polymer microspheres to contain nickel ions, reducing the nickel ions into nickel nanoparticles, activating the microspheres and carrying out chemical plating. According to the invention, the specific surface area of the conductive microspheres is increased by reducing the nickel nanoparticles on the surfaces of the microspheres, a large amount of impurities cannot be generated among the microspheres, and adhesion among the microspheres can be effectively prevented. According to the prepared conductive microspheres, the plating layer and the polystyrene microspheres are firmly combined, and the risk that the conductivity is reduced due to the fact that the surface of the plating layer falls off is reduced. The preparation method is safe, environment-friendly, simple, convenient and suitable for industrial production requirements.

The application provides a preparation method of an octene aldehyde liquid-phase hydrogenation catalyst, and steps of the method comprise the following: (1) preparing a salt solution containing nickel ions, copper ions and aluminum ions, heating to 40-80 DEG C, adding a basic precipitator to react, and aging after the reaction is completed; (2) uniformly mixing the precipitate obtained after aging in step (1) with silica sol to obtain slurry; (3) washing and filtering the slurry, then adding alkali metal carbonate powder and boron nitride solid, uniformly mixing, and then shaping, drying and calcining to obtain the octene aldehyde liquid-phase hydrogenation catalyst. The preparation method is simple, green, environmentally friendly and easy to industrialize, the conversion rate and selectivity of the obtained octene aldehyde liquid-phase hydrogenation catalyst are high, and the catalyst is stable in performance and durable.

The invention belongs to the technical field of hydrometallurgy, and particularly relates to a method for separating nickel and cobalt from a nickel-containing solution and preparing nickel salt, which comprises the following steps: 1) chelating and precipitating impurity metal ions in the nickel-containing solution by using ammonium polyphosphate with the polymerization degree of more than 1000 as an impurity removal agent, thereby removing copper, iron, zinc and aluminum to obtain an impurity-removed solution; 2) extracting the impurity-removed solution by using a diluent, alpha-hydroxyoxime, carboxylic acid and alkyl alcohol as an extraction organic phase to obtain a nickel-loaded organic phase; 3) washing the nickel-loaded organic phase by using nickel-containing washing water; and (4) reverse extraction is conducted on the washed nickel-loaded organic phase through reverse extraction liquid containing acid and nickel ions, nickel-rich liquid is obtained after reverse extraction is completed, nickel salt in the nickel-rich liquid is crystallized, and nickel salt solids are obtained after phase separation. According to the method, nickel is selectively extracted through the compound extraction system after impurity removal, the extraction rate of nickel reaches up to 99.8%, nickel is separated from metal ions such as cobalt and lithium, and the method is simple in process, low in equipment manufacturing cost and low in manufacturing cost.

The invention relates to the technical field of battery management, in particular to a sodium nickel chloride battery pack balanced charging and discharging control method based on an intelligent algorithm. The method comprises the steps of obtaining working parameters of each single battery of a battery pack and controlling the temperature to a preset range; detecting sodium and nickel ion concentration parameters of each single battery, calculating a sodium ion transmission rate, and determining a charge-discharge rate parameter; and calculating a state-of-charge value and a state-of-health value based on the working parameters and the rate parameters, and determining charging and discharging time and strategies, thereby realizing balanced charging and discharging of the battery pack. The method can improve the charge-discharge efficiency of the sodium nickel chloride battery pack, prolong the service life and ensure the safe and stable operation of the battery pack.

The invention discloses a spinel type catalyst for preparing chlorine through electro-catalysis and a preparation method of the spinel type catalyst, and relates to the technical field of electro-catalysis materials. The catalyst is a nickel-doped cobalt spinel oxide, the chemical general formula of the catalyst is NixCo3-xO4, the value range of x is 0.4-0.6, the crystal structure of the catalyst belongs to a cubic system spinel structure, and nickel ions selectively occupy octahedral sites in spinel crystal lattices and partially replace original Co < 3 + > ions. The spinel type non-noble metal catalyst with high chlorine evolution activity, high selectivity and good stability is constructed by accurately controlling the nickel doping concentration and optimizing hydrothermal and annealing process parameters.

This invention relates to the field of electroless plating technology, and more particularly to a low-phosphorus electroless nickel plating solution and a method for nickel plating on an aluminum alloy substrate. The low-phosphorus electroless nickel plating solution comprises the following components by mass concentration: a nickel ion source in the form of Ni... 2+ Calculated as 1.0~5.0 g / L; hypophosphite as H2PO2 ‑ The concentrations are calculated as follows: 20–45 g / L; glycine 5–40 g / L, gluconate 5–60 g / L; polyaspartic acid and / or its salts 0.2–5.0 g / L; pH buffer 2–25 g / L; alkyl glycosides 0.05–1.0 g / L; iodate stabilizer, in IO3... ‑ The concentration is calculated to be 0.2~5.0 mg / L. This invention maintains a high deposition rate and significantly improves the tolerance of by-products in the bath solution under low nickel ion concentration conditions. It is also free of heavy metals and sulfur-containing organic stabilizers, reducing the metal load and environmental risk of the waste liquid. It is suitable for various aluminum alloy matrices treated with double zinc replacement.

The utility model provides nickel-containing wastewater treatment equipment and a nickel-containing wastewater treatment system. The nickel-containing wastewater treatment equipment comprises a primary sedimentation tank, a primary flocculation device, an ozone tower, a secondary flocculation device and a secondary sedimentation tank. And the primary flocculation device is communicated with a water inlet of the primary sedimentation tank. And the ozone tower is communicated with the water outlet of the primary sedimentation tank. And the secondary flocculation device is communicated with the ozone tower. And a water inlet of the secondary sedimentation tank is communicated with the secondary flocculation device. According to the nickel-containing wastewater treatment equipment, for nickel-containing wastewater with complex water quality, the treatment cost can be well reduced, the treatment burden of a biochemical system is relieved, and the oxidation decomplexing stability of nickel ions is ensured.

The application belongs to the technical field of luminescent materials, and particularly relates to a nickel ion doped fluoride near-infrared two-region long-wave luminescent nano probe and a preparation method thereof, wherein the nano probe comprises a fluoride nanocrystal matrix and transition metal nickel ions as a luminescent center, or a core-shell structure nano probe formed by taking the above-mentioned substances as a shell layer and being externally coated with an inert shell layer or a homogenous epitaxial layer. The probe realizes wide-range regulation of an emission peak in a 1300nm to 2150nm near-infrared two-region long-wave band; through core-shell structure design and inert shell layer coating, surface defects are effectively passivated, luminescent quantum efficiency is significantly improved, and particle size is precisely controlled. Through nickel ion doping and crystal field regulation strategies, the application develops a new type of non-lanthanide near-infrared two-region long-wave luminescent material; the application has unique dual-wavelength excitation characteristics and wideband emission characteristics, and has wide application prospects in multi-channel biological detection and imaging analysis.

The application discloses an intermediate processing liquid for an electroless nickel immersion gold (ENIG) production line and a chemical gold preparation method. The intermediate processing liquid is applied between the electroless nickel plating and immersion gold processes, and comprises (a) a pH buffer and a metal ion complexing agent: a total concentration of 50-150 g / L; (b) an adsorptive corrosion inhibitor: a concentration of 0.5-5.0 g / L; (c) a low-foam non-ionic surfactant: a concentration of 0.01-10 g / L; (d) an auxiliary antioxidant: a concentration of 0.5-30 g / L; (e) a dissolving agent: a concentration of 1-50 ml / L; (f) a pH regulator: an appropriate amount, which is added to maintain the pH value of the intermediate processing liquid at 4.0-6.5; and (g) deionized water: a balance, so that the concentrations of the above components reach the set target values; and the intermediate processing liquid has a design use temperature of 20-45 DEG C. The intermediate processing liquid removes residual nickel ions on the board surface and in micropores through strong complex cleaning, and blocks the pollution to the subsequent gold tank; meanwhile, the preferential adsorption of the corrosion inhibitor molecules at the nickel layer grain boundaries forms a controllable molecular-level protective film, effectively adjusts the immersion gold replacement reaction kinetics, and prevents the occurrence of intergranular corrosion (black plate).

A method for producing mixed metal salts containing manganese ions and at least one of cobalt ions and nickel ions, the method including: an Al removal step of subjecting an acidic solution containing at least manganese ions and aluminum ions, and at least one of cobalt ions and nickel ions, to removal of the aluminum ions by extracting the aluminum ions into a solvent, the acidic solution being obtained by subjecting battery powder of lithium ion batteries to a leaching step; and a precipitation step of neutralizing an extracted residual liquid obtained in the Al removal step under conditions where a pH is less than 10.0, to precipitate mixed metal salts comprising a metal salt of manganese and a metal salt of at least one of cobalt and nickel.

The invention provides a method for removing ferrous iron in a nickel chloride solution through efficient oxidation promotion, belongs to the technical field of purification treatment of chlorination system solutions, and solves the problem that free ferrous iron in the nickel chloride solution cannot be effectively oxidized and converted into ferric iron in the prior art. Controlling the concentration of main metal nickel ions, and adding a corresponding amount of hydrogen peroxide into the nickel chloride solution for stirring according to the content of impurity Fe in the nickel chloride solution; injecting the stirred nickel chloride solution into an electrolytic bath, heating, and raising the temperature of the nickel chloride solution in the bath; and the cathode and the anode in the electrolytic bath are conducted, and the introduced nickel chloride solution is subjected to electrolytic treatment, so that divalent iron in the nickel chloride solution can be converted into trivalent iron. The process flow is simple, the production process is easy to control, the facility equipment investment is low, and the final benefit is remarkable.

This invention belongs to the field of secondary utilization technology of metal resources, specifically relating to a method for treating waste liquid from electroplating zinc-nickel alloys. The method includes the following steps: S1, mixing the waste liquid from electroplating zinc-nickel alloys, oxygen, and a catalyst, and performing an oxidation reaction to obtain an intermediate liquid and nitrogen; the oxidation reaction temperature is ≥220℃; S2, adjusting the pH of the intermediate liquid to 13.0-13.5, performing a first filtration separation to obtain nickel hydroxide sludge and filtrate 1; S3, adjusting the pH of filtrate 1, performing a second filtration separation to obtain zinc hydroxide sludge and filtrate 2. This invention first degrades COD to obtain zinc and nickel ions; adjusting a specific pH value generates nickel hydroxide sludge, with zinc ions existing in the system as polyhydroxy zinc anions, achieving separation of nickel and zinc; further adjusting the pH separates zinc from the system as zinc hydroxide sludge precipitate. The operation is simple, with high separation efficiency and high purity.

The application discloses a genetic marker linked with a wheat kernel nickel ion accumulation QTL qNi.hnaas-6BS, adopts a Wheat Breeders 660K microarray chip to identify genotype data of a natural population, combines phenotype data of kernel nickel ion content of the wheat natural population, carries out whole genome association analysis (GWAS), identifies that a quantitative trait locus (QTL) qNi.hnaas-6BS for controlling wheat kernel nickel ion accumulation exists on a short arm of a 6B chromosome of the wheat, the QTL is closely linked with SNP6872, is located at the 125,482,475th nucleotide of the 6B chromosome, and the SNP6872 has C / T polymorphism. Haplotype analysis results on a population level show that when the nucleotide of the site is CC, the wheat kernel has lower nickel ion content, and is a favorable allelic genotype for limiting the accumulation of the wheat kernel nickel ion.

The application discloses a treatment method of electroless nickel plating waste liquid, which comprises the following steps: waste liquid pretreatment, waste liquid dephosphorization, waste liquid deironing, waste liquid denickelization, nickel-iron purification and biochemical treatment, and the whole process steps are reasonably designed, the resource treatment of nickel and phosphorus in the waste liquid is realized under the premise of not introducing new pollution factors. By adding an oxidizing agent, high ferric acid is used to remove phosphorus ions, then by adjusting the pH value of the waste liquid, most of the iron ions are precipitated, then modified biochar is used to remove most of the nickel ions, then sulfide precipitant and PAM diluent are added to remove the remaining nickel ions and iron ions, finally, hydrolysis acidification and MBR process are used to quickly remove the remaining complex organic matters, the whole process flow is short, the amount of reagent used is small, and the cost is low.

The invention provides a preparation method of a nickel-plated BC solar cell silicon substrate, a BC solar cell and a photovoltaic module, and relates to the technical field of solar cells. The preparation method comprises the following steps: taking a BC cell silicon substrate as a cathode, enabling the to-be-electroplated surface of the BC cell silicon substrate to be in contact with nickel electroplating liquid, carrying out flash plating treatment, and then carrying out main plating treatment to obtain a nickel-plated BC solar cell silicon substrate. According to the preparation method of the nickel-plated BC solar cell silicon substrate, flash plating is firstly carried out, a layer of extremely thin nickel can be rapidly covered on a patterned area of the silicon substrate, and a sealing bottom layer which is firm in attachment and low in porosity is constructed; the current distribution is more uniform, and nickel ions are favorably diffused and deposited towards the deep part and the central area of the pattern, so that better deep plating capability and overall thickness uniformity are obtained, and finally, the adhesive force, the uniformity and the reliability are comprehensively improved.

A method of producing a flexible nickel phosphorus coating on a substrate. The substrate includes a dielectric material having a copper layer thereon. The method comprises the steps of: (1) activating the substrate with a palladium activation solution to catalyze the substrate, and 2) contacting the activated substrate with an electroless nickel phosphorus plating bath comprising: (i) a source of nickel ions; (ii) a hypophosphite ion source; (iii) at least one metal complexing agent; and (iv) an organic flexible additive. The nickel-phosphorus plating layer deposited on the substrate shows a columnar grain structure.

This invention discloses a method for preparing and applying a Ni-doped Co3O4 catalyst. The invention employs a pressure co-precipitation method, comprising the following steps: co-current mixing of a cobalt salt solution, a nickel salt solution, and a precipitant solution. Using ultrapure water as a solvent and sodium carbonate as the precipitant solution, nickel nitrate hexahydrate and cobalt nitrate hexahydrate are mixed and calcined to synthesize a magnetic thermocatalytic material. Through nickel ion doping, the Co3+ in Co3O4 undergoes a transition from a low-spin to a high-spin state, enhancing the hybridization of the 3d-2p orbitals, promoting the breaking of O-O bonds, and significantly improving its efficiency in synergistically removing ozone and formaldehyde. This invention is expected to be widely applied in the thermocatalytic treatment of harmful gases.

The invention discloses core-shell structure nickel-copper sulfide, a preparation method thereof and a supercapacitor based on the core-shell structure nickel-copper sulfide, and belongs to the technical field of supercapacitor electrode materials. The method comprises the following steps: uniformly mixing a solution containing nickel ions and copper ions with a ligand to obtain a turbid liquid; carrying out plasma activation treatment on the turbid liquid, carrying out gradient heating and heat preservation, centrifugally collecting precipitates, washing and drying to obtain spherical Ni-Cu bimetal MOF powder; the preparation method comprises the following steps: dissolving spherical Ni-Cu bimetal MOF powder, and dispersing to obtain a precursor suspension; and under an inert atmosphere, injecting a dissolving solution containing thioacetamide and thiourea into the precursor suspension, uniformly mixing, vulcanizing, centrifuging, washing, drying and calcining to obtain the nickel-copper sulfide with the core-shell structure. Experiments prove that the nickel-copper sulfide with the core-shell structure can solve the problems that an existing MOF derivative sulfide electrode material is limited in specific surface area and insufficient in capacitive performance, and a preparation process is prone to causing structural damage.

The application discloses an electro-catalysis-plasma coupling device for recovering elemental nickel from chemical nickel waste liquid and relates to the technical field of wastewater treatment. The device comprises a movable box body, an electrolysis unit and a plasma treatment unit arranged in the movable box body. The device integrates electrolysis, plasma, temperature control and circulation in the movable box body, has a compact structure, is convenient to transport and deploy on site, and is suitable for various scenes such as laboratories, electroplating workshops and wastewater treatment stations. A heating device is arranged in the electrolytic tank to heat and maintain the electrolyte in a target temperature range. A plasma generator is arranged to perform plasma quenching treatment on the electrolyte during electrolysis, significantly improve the concentration of free nickel ions in the electrolyte, improve the electrodeposition effect, and control the wastewater to quickly reach the electrolysis water level through the overflow port, the stainless steel rod, the magnetic pump, the check valve and the distribution box. The discharged electrolyte can be sent back to the electrolytic tank for re-electrodeposition by changing the placement of the water inlet pipe, thereby improving the recovery amount of nickel.

The application provides a copper adsorption material and a preparation method and application thereof, and the copper adsorption material is prepared by using salicylic hydrazide monomers and methacrylic acid as raw materials through an emulsion polymerization method. The salicylic hydrazide monomers used in the application are salicylic hydrazide derivatives with introduced propylene bonds, and the multi-dentate coordination structure of the salicylic hydrazide derivatives can specifically chelate copper ions; the hydrophilic monomer used is methacrylic acid, and the carboxyl group of the methacrylic acid can bring good hydrophilic performance to the material and improve adsorption kinetics. The copper adsorption material of the application is applied to a mixed solution containing copper ions, nickel ions and cobalt ions to selectively separate copper ions.

The application discloses a nickel-based metal organic framework and a preparation method and detection application thereof. The nickel-based metal organic framework is formed by coordination of 2,6-bis(1H-pyrazol-1-yl) isonicotinic acid (H2BPIA) and nickel ions Ni(II). The H2BPIA and NiCl2·6H2O are prepared by a hydrothermal / solvothermal method in a water-acetonitrile mixed solvent, and the obtained nickel-based metal organic framework has high thermal stability and can be used for detection of marbofloxacin and has the advantages of high selectivity, strong anti-environmental interference capability and fast response speed.

The invention relates to a microporous copper foil and a preparation method and application thereof, and the method comprises the following steps: placing an anode and a cathode in an electrolyte for electrolysis, and depositing the microporous copper foil on the cathode; wherein the electrolyte contains copper ions, nickel ions, sulfuric acid, a complexing agent, a buffering agent and chitosan, and in the electrolyte, the concentration of the copper ions is 60 g / L-90 g / L, the concentration of the nickel ions is 30 g / L-50 g / L, the concentration of the complexing agent is 30 g / L-45 g / L, the concentration of the buffering agent is 10 g / L-22 g / L, and the concentration of the chitosan is 8 mg / L-16 mg / L; the current density of electrolysis is 60 A / dm < 2 >-80 A / dm < 2 >. According to the method, the tensile strength of the microporous copper foil is improved to 550MPa or above on the premise that the thickness is small and the porosity is high.

The application relates to the technical field of battery management, in particular to a sodium-chlorine nickel battery pack equalization charging and discharging control method based on an intelligent algorithm. The method comprises the following steps: acquiring working parameters of each single battery of the battery pack and controlling the temperature to a preset range; detecting sodium and nickel ion concentration parameters of each single battery, calculating a sodium ion transmission rate, and determining a charging and discharging rate parameter; calculating a state of charge value and a state of health value based on the working parameters and the rate parameter, determining a charging and discharging time and a strategy, so that the battery pack is equalized in charging and discharging. The method can improve the charging and discharging efficiency of the sodium-chlorine nickel battery pack, prolong the service life, and ensure the safe and stable operation of the battery pack.

A method of producing a flexible nickel phosphorus plating layer on a substrate. The substrate comprises a dielectric material with a copper layer thereon. The method includes the steps of (1) activating the substrate with a palladium activation solution to catalyze the substrate, and (2) contacting the activated substrate with an electroless nickel phosphorus plating solution comprising (i) a source of nickel ions; (ii) a source of hypophosphite ions; (iii) at least one complexing agent; and (iv) an organic flex additive. The nickel phosphorus plating layer deposited on the substrate exhibits a columnar grain structure.

The application discloses a molecular marker related to wheat kernel nickel ion accumulation, uses a natural population constructed by a team in the early stage, uses a Wheat Breeders 660K microarray chip to identify genotypic data of the natural population, combines phenotypic data of the wheat natural population kernel nickel ion content, carries out whole genome association analysis (GWAS), identifies that a quantitative trait locus (QTL) qNi.hnaas-6BL controlling the wheat kernel Ni ion accumulation exists on a long arm of a 6B chromosome of the wheat, the QTL is closely linked with SNP4008, is located at the 693,584,519th nucleotide of the 6B chromosome, and the SNP4008 has A / G polymorphism. Haplotype analysis results on the population level show that when the nucleotide of the site is AA, the wheat kernel has lower nickel ion content, and is a favorable allelic genotype; when the nucleotide of the site is GG, the wheat kernel has higher nickel ion content, and is an unfavorable allelic genotype.

The present invention discloses a highly charged Nickel ion optical clock and its implementation method. It uses Ni12+ ions as the clock's reference system, which provides superior anti-interference capabilities and measurement precision compared to conventional low-charge-state ion optical clocks. The Ni12+ ions possess two transition spectral lines at 498 nm and 511 nm that can serve as clock transitions. Utilizing both 498 nm and 511 nm lasers enables a single ion reference system to output two clock signals, allowing for mutual verification. Frequency calibration using these two laser frequencies facilitates the timely detection of operational issues through abrupt changes in their frequency ratio. This approach avoids the problem inherent in a single optical frequency clock, where losing synchronization with the time reference can result in immediately undetectable, erroneous clock signal outputs, thereby significantly enhancing the overall stability of the optical clock.

A nickel electrolyte for depositing a satin nickel layer, the nickel electrolyte comprising: (a) at least one source of nickel ions; (b) at least one chloride ion source; (c) at least one source of alkyl sulfonic acid zwitterions; (d) a primary brightener, wherein the primary brightener comprises saccharin or a salt thereof; (e) at least one sulfonic acid; (f) at least one polymer and / or copolymer based on polyethylene glycol and / or polypropylene glycol; (g) optionally, at least one wetting agent; and (h) optionally, at least one additional brightener. The invention further comprises a method for electrodepositing the satin nickel layer on the substrate.

The utility model discloses a nickel-containing wastewater treatment device, which relates to the technical field of nickel-containing wastewater treatment and comprises a box body, a hollow column is arranged at the top end of the box body, and a screen plate slides on the inner wall of the hollow column, so that a connecting block fixed on the outer wall of the screen plate is inserted into the inner wall of a groove block, and the screen plate is stably mounted on the inner wall of the hollow column. The outer wall of the insertion column is sleeved with the inner wall of the annular plate until the bottom end of the insertion column is clamped with the inner wall of the box body, so that nickel ions in the nickel-containing wastewater are quickly removed, the nickel-containing wastewater is prevented from being in direct contact with the activated carbon filter element, and a pore structure in the activated carbon filter element is prevented from being blocked by large impurities in the wastewater; the outer wall of the baffle is sleeved with the inner wall of the hollow column, the outer wall of the square column is separated from the inner wall of the concave hole, so that impurities adsorbed on the inner wall of the screen plate are cleaned, the situation that a large number of impurities are accumulated on the inner wall of the screen plate after the device treats nickel-containing wastewater for a long time is avoided, and the using effect of the device is effectively improved.