342 results about "Electroplating wastewater" patented technology

The invention provides an electroplating wastewater dosage prediction system based on a dynamic flow-concentration coupling model, and relates to the technical field of industrial wastewater treatment.The electroplating wastewater dosage prediction system is characterized in that the dynamic flow-concentration coupling model is established by collecting real-time flow and heavy metal ion concentration parameters of a wastewater treatment system; the method comprises the following steps: identifying a time-lag relationship and coupling strength between flow change and concentration fluctuation, generating a flow-concentration coupling strength matrix, constructing a dosage prediction curve by adopting a piecewise linear mapping method on the basis of the matrix, performing matching positioning on a current flow-concentration coupling state, and performing gradient pulse dosage parameter prediction by applying a gradient pulse dosage parameter prediction technology. And the dosage of the medicament can be accurately predicted. Therefore, the problems that the removal rate of partial heavy metals is reduced, the medicament utilization rate is low, and even secondary pollution is possibly caused or the operation cost is obviously increased due to the fact that the adding amount and the adding time sequence of various medicaments are difficult to adjust timely and accurately can be solved.

The invention discloses an electroplating wastewater zero-discharge process based on a roll-type packaged RO membrane, and relates to the field of wastewater discharge, and the electroplating wastewater zero-discharge process comprises the following steps: S1, micro-electrolysis treatment; s2, advanced oxidation treatment; s3, ultrafiltration treatment: the electroplating wastewater subjected to advanced oxidation treatment enters a first-stage RO device, effluent of the first-stage RO device enters a second-stage RO device and then enters a concentrated water RO membrane device, effluent of a concentrated water RO membrane is recycled, concentrated water enters the concentrated water RO membrane device to be filtered again, produced water generated by the concentrated water RO device is recycled for production, and the concentrated water enters an ultrahigh-pressure RO device to be concentrated again; and S4, evaporation treatment. According to the electroplating wastewater zero-discharge process based on the roll-type packaged RO membrane, when the electroplating wastewater is discharged, the dosage of chemicals can be effectively reduced, and organic matters in the electroplating wastewater can be removed by utilizing a chemical oxidation method, so that the whole process is more stable and simpler, and the process is high in water recovery rate, stable in water quality and low in cost. And the generation amount of concentrated water is less.

The invention discloses an electroplating wastewater concentration and filtration system and method based on secondary RO, and relates to the field of electroplating wastewater concentration and filtration, and the system comprises a pretreatment unit, a primary RO unit, a secondary RO unit, a concentration treatment unit and a control unit. According to the electroplating wastewater concentration and filtration system and method based on the secondary RO, secondary RO treatment can further improve water quality on the basis of primary RO, molecular pollutants and salt of different sizes can be gradually removed by accurately designing performance parameters and an arrangement mode of two stages of RO membrane assemblies, and compared with traditional primary RO treatment, the system and the method have the advantages that the water quality is improved, and the cost is reduced. According to the system, the recycling rate of the electroplating wastewater can be increased to 90% or above from 60%-70%, the taking amount of fresh water is greatly reduced, meanwhile, the water quality of secondary RO fresh water can meet the high requirement for rinsing water in the electroplating process, the product quality can be effectively guaranteed, the defective rate caused by the water quality problem is reduced, and the production benefit is improved.

The invention discloses a post-electroplating wastewater treatment system and treatment method with graded recovery, and relates to the technical field of electroplating wastewater treatment.The post-electroplating wastewater treatment system comprises a recovery cylinder, a primary separation unit, a chemical adding unit, a final-stage separation unit and a driving unit, and the recovery cylinder is used for mounting and fixing the primary separation unit, the chemical adding unit, the final-stage separation unit and the driving unit; the primary separation unit is used for separating greasy dirt and precipitated impurities, the chemical adding unit is used for separating suspended solids, the final-stage separation unit is used for separating organic matters and cleaning the inner wall, and when sewage enters the recycling barrel, the driving unit is used for controlling the primary separation unit to separate and recycle the greasy dirt and the precipitated impurities, and the chemical adding unit is used for recycling the suspended solids; organic matter separation and inner wall cleaning are carried out through the final-stage separation unit, and the influence on the separation and recovery efficiency is avoided.

The utility model provides a process system for recycling electroplating comprehensive wastewater, which relates to the technical field of wastewater treatment and is characterized in that a liquid inlet of a primary electrodeionization device is communicated with a primary wastewater treatment unit, and a fresh water outlet of the primary electrodeionization device is communicated with a secondary wastewater treatment unit; a concentrated water outlet of the first-stage electrodeionization device is communicated with the second-stage electrodeionization device; a fresh water outlet of the secondary electrodeionization device is communicated with the primary electrodeionization treatment device, and a concentrated water outlet of the secondary electrodeionization device is communicated with the solid-liquid separation device; a liquid outlet of the solid-liquid separation device is communicated with the evaporation device; the evaporation device comprises a condensed water outlet and a byproduct salt outlet, and the condensed water outlet is communicated with the secondary wastewater treatment unit; a produced water outlet of the secondary wastewater treatment unit is communicated with the produced water collecting tank; a waste liquid outlet of the second-stage wastewater treatment unit is communicated with a second-stage electrodeionization device, so that pollutants such as heavy metal ions and organic matters in wastewater can be removed, and cyclic utilization of water resources and recovery of salt resources are realized.

The invention discloses a multi-coupling electroplating wastewater treatment process, which relates to the technical field of electroplating wastewater treatment and comprises pretreatment, a chemical precipitation method, an ion exchange method, a reverse osmosis method, advanced treatment and sludge treatment. The device has the characteristics of reasonable and simple structure, low production cost and convenience in installation, various pollutants such as suspended particulate matters, heavy metal ions, trace organic matters and the like in the electroplating wastewater can be effectively removed through multiple process coupling, the water quality is ensured to reach the reuse standard, and the cyclic utilization of water resources is realized; according to characteristics of different heavy metal wastewater, the pH value is accurately adjusted, chemical precipitation, ion exchange and other processes are combined, the heavy metal removal efficiency is remarkably improved, and the treatment effect on wastewater containing copper and nickel is especially excellent; according to the filtering equipment, the movable separation base, the switching communication mechanism and the circulating filtering mechanism cooperatively operate, comprehensive filtering of wastewater can be achieved, impurities can be effectively collected through the suspension collecting mechanism, and the pretreatment effect is guaranteed.

The present application discloses a method for treating and resourcefully recycling electroplating cyanide copper wastewater, belonging to the technical field of electroplating wastewater treatment. In this application, the cyanide copper wastewater is adjusted with strong base, and a ferrous sulfate solution is added to the cyanide copper wastewater after strong base adjustment for a combination reaction; the cyanide copper wastewater after the combination reaction is adjusted with acid and subjected to a Prussian blue reaction; a coagulant aid is added to the solution after the Prussian blue reaction, and solid-liquid filtration separation is carried out on it to obtain iron cyanide sludge and preliminarily precipitated cyanide-removing wastewater; the preliminarily precipitated cyanide-removing wastewater is adjusted with weak base, hydrogen peroxide is added to the preliminarily precipitated cyanide-removing wastewater after weak base adjustment, and the copper in the preliminarily precipitated cyanide-removing wastewater after weak base adjustment is used as a catalyst for an oxidation reaction to remove the remaining cyanide-containing pollutants; after the oxidation reaction is completed, lime is added for flocculation precipitation to obtain copper sludge, thus realizing a one-step process flow, converting copper cyanide compounds into resources that can be recycled, and improving the resource utilization rate.

The invention belongs to the technical field of industrial wastewater purification, and discloses a membrane-free single-tank water electrolysis hydrogen production-electroplating wastewater enrichment coupling method and device, and the method comprises the following steps: injecting a neutral electroplating wastewater mixed solution into a membrane-free single tank; discharging air in the membrane-free single tank, and heating the neutral electroplating wastewater mixed solution to a preset temperature; direct current is firstly introduced into the heated neutral electroplating wastewater mixed solution, so that metal ions in the neutral electroplating wastewater mixed solution migrate to the hydrogen evolution electrode, then the direct current is converted into pulse current, so that the metal ions deposit on the hydrogen evolution electrode, and hydrogen precipitated on the hydrogen evolution electrode is continuously collected; closing the current, taking out the hydrogen evolution electrode and collecting metal ions on the hydrogen evolution electrode; and adding an oxygen evolution catalyst into the membrane-free single tank, starting the magnetic rotor to carry out oxygen evolution reaction, and taking out the oxygen evolution catalyst until bromate in the neutral electroplating wastewater mixed solution is completely reduced. According to the invention, the preparation of high-purity hydrogen and oxygen and the enrichment of metal ions can be realized.

The invention discloses a method for preparing a sandwich type composite membrane capable of efficiently adsorbing heavy metal ions, and belongs to the field of water pollution treatment. The preparation method comprises the following steps: firstly, carrying out hydrolysis modification on polylactic acid particles, then dissolving the polylactic acid particles in dichloromethane / N, N-dimethylformamide to prepare an outer-layer spinning solution, and meanwhile, mixing polyvinyl alcohol, sodium alginate and polyethyleneimine to prepare an inner-layer spinning solution; performing electrostatic spinning on the outer-layer spinning solution to obtain an outer-layer film named as an outer-layer PLA film, performing electrostatic spinning on the inner-layer spinning solution to obtain an inner-layer film named as an inner-layer PVA / SA / PEI film, and re-spinning the outer-layer PLA film on the other side of the inner-layer PVA / SA / PEI film by using the outer-layer spinning solution, namely wrapping the inner-layer PVA / SA / PEI film with the two outer-layer PLA films to form a sandwich structure; and finally, obtaining the composite membrane by adopting a calcium ion cross-linking process. The composite membrane can efficiently adsorb metal ions, is high in adsorption performance retention rate and good in strong acid stability, and is suitable for selective iron removal of electroplating wastewater.

The invention belongs to the technical field of electroplating wastewater treatment, and particularly relates to acidic electroplating wastewater treatment equipment and process based on combination of Fenton oxidation and acid-resistant nanofiltration membrane separation. Considering that the acidic nickel plating wastewater not only can provide acidic conditions, but also has ferrous ions, based on this, the acidic nickel plating wastewater is used as a raw material and is mixed with the ferrous ions and hydrogen peroxide for a Fenton reaction, and then iron ions and nickel ions are separated by adopting a PP precision filter and an anti-high-turbidity ultrafiltration system. According to the method, iron ions are recycled after being reduced by an iron reduction reactor, nickel ions are separated by adopting an acid-resistant nanofiltration system, and the obtained nickel ions are subjected to electroplating and water recycling again, so that the technical defects existing in the traditional nickel plating wastewater treatment are overcome, and the utilization of the acidic nickel plating wastewater is realized.

The invention belongs to the technical field of wastewater filtration, and relates to a flocculation, purification and recovery all-in-one machine for electroplating wastewater, the flocculation, purification and recovery all-in-one machine comprises a bottom frame, a treatment barrel, a sealing cover, a liquid injection pipe and an agent feeding pipe, the treatment barrel is connected to the middle of the upper part of the bottom frame, the top of the treatment barrel is connected with the sealing cover, and a discharge port is formed in the eccentric position of the bottom of the treatment barrel; a liquid injection pipe and an agent feeding pipe are connected to the sealing cover and both communicate with the interior of the treatment barrel. After harmful substances in wastewater are flocculated, the separation barrel with precipitates can be rotated to the position below the filter pressing plate, then the filter pressing plate can be controlled to move downwards to extrude the precipitates, water doped in the precipitates is extruded out, and therefore the effect that the precipitates are subjected to filter pressing treatment after flocculation can be achieved; the subsequent filter pressing treatment is not needed, the operation is more convenient, and the efficiency is higher.

The invention relates to the technical field of electroplating wastewater treatment, and discloses an electroplating wastewater pollution early warning and regulation system based on Internet of Things, comprising: a sensing layer for collecting characteristic parameters of an electroplating wastewater treatment link through distributed sensing nodes, the characteristic parameters including a water quality parameter, an equipment operation parameter and an environmental parameter, a wireless communication module is arranged in the sensing node; the network layer is used for constructing a wireless communication network and transmitting the parameters acquired by the sensing layer to the application layer through a multi-hop relay; and the application layer receives and processes the parameters transmitted by the network layer to realize pollution early warning, pollution risk prediction and regulation and control instruction generation, and the regulation and control instruction is fed back to the execution layer through the network layer. By adopting a channel frequency hopping mechanism, when it is monitored that the interference intensity of a current communication channel exceeds a preset interference threshold value, the standby channel can be automatically switched, instruction transmission of an application layer and an execution layer is not interrupted, and it is guaranteed that data such as water quality parameters and equipment operation parameters collected by a sensing layer are continuously and stably transmitted to the application layer.

The invention discloses a complex-containing electroplating wastewater treatment method, and belongs to the technical field of sewage treatment engineering, and the complex-containing electroplating wastewater treatment method comprises the following steps: S1, introducing complex-containing electroplating wastewater into an adjusting tank for homogenization and impurity removal; s2, carrying out complex breaking treatment on the homogeneous and impurity-removed complex-containing electroplating wastewater through a multi-source catalytic oxidation complex breaking unit; s3, the pH is adjusted, impurities in the complexed electroplating wastewater are moderately precipitated, then the complexed electroplating wastewater is filtered through a coagulation microfiltration membrane assembly, and a metal liquid phase is obtained; s4, after being fed into a resin recovery unit, eluting, and finally recovering valuable metals through an electro-deposition tank or a resin coupling evaporation concentration unit; s5, feeding the wastewater into a guarantee reaction sedimentation tank for oxidation reaction and coagulation reaction to obtain primarily treated wastewater; and S6, mixing the primarily treated wastewater, and treating the wastewater in an evaporation recycling system to obtain standard wastewater and industrial salt. According to the invention, heavy metal complexes in the electroplating wastewater can be effectively broken, and efficient recovery of heavy metals and reuse of wastewater reaching the standard are realized.

The invention discloses an electroplating chromium-containing wastewater treatment device and an electroplating chromium-containing wastewater treatment method, and belongs to the technical field of electroplating wastewater treatment. The electroplating chromium-containing wastewater to be treated flows into a cathode chamber in a reaction treatment unit from a water inlet, hexavalent chromium in the electroplating chromium-containing wastewater is converted into trivalent chromium through electrons near a carbon-based cathode, and then the trivalent chromium flows into an anode chamber in the reaction treatment unit; the dissolving-out type iron anode loses electrons to generate ferrous ions, residual hexavalent chromium in the electroplating chromium-containing wastewater is reduced into trivalent chromium through the ferrous ions, and the wastewater sequentially passing through the cathode chamber and the anode chamber flows out of the water outlet; wherein electron movement is generated between the cathode chamber and the anode chamber through the conductive diaphragm, so that an electrode and a medicine do not need to be additionally added when the device is used for treating the wastewater, and the wastewater treatment cost is reduced.

The invention provides an electroplating wastewater dosing feedback regulation method based on online water quality detection, and relates to the technical field of environmental chemical analysis and water quality monitoring, the electroplating wastewater dosing feedback regulation method comprises the following steps: collecting chromium ion concentration parameters, pH value parameters and oxidation-reduction potential parameters of electroplating wastewater, and combining a trained chromium ion reduction model to carry out real-time calculation and analysis; and dynamic correction and closed-loop feedback adjustment of the dosage are realized. Therefore, the accuracy and the response speed of dosing control can be remarkably improved, the problem of excessive dosing or insufficient dosing of the medicament is effectively reduced, and meanwhile, the stability and the standard-reaching rate of wastewater treatment are ensured, so that the economical efficiency and the environmental protection property of wastewater treatment are improved.

The invention relates to the technical field of wastewater treatment, and discloses an electroplating wastewater sodium ion removal method based on ion exchange resin, which comprises the following steps: step 1, pretreating electroplating wastewater; step 2, flocculent precipitation; 3, plate-frame pressure filtration treatment is adopted; step 4, ion exchange treatment; in the step 4, resin which is subjected to polyethylene glycol grafting treatment and has sulfonic acid groups is used as sodium ion selective ion exchange resin. According to the method for removing the sodium ions in the electroplating wastewater based on the ion exchange resin, the PEG grafted resin with the sulfonic acid group is adopted for treating the electroplating wastewater, so that the sodium ions in the wastewater can be more effectively removed, the removal efficiency of the sodium ions is improved, and the service life of the ion exchange resin is prolonged. In addition, a medicament combination form of the modified zeolite and the PAM flocculant is adopted, and a complexing agent with relatively high price is not needed, so that the medicament cost can be greatly reduced.

The invention provides comprehensive treatment equipment for electroplating wastewater, and relates to the technical field of electroplating wastewater treatment, and the comprehensive treatment equipment comprises a treatment sedimentation tank and a movable agent feeding mechanism. The side wall of the treatment sedimentation tank is provided with an outer supporting slideway and a switching assembly; and the movable mechanism comprises a movable frame, an agent feeding structure, a filter plate stirring assembly and a forward moving driving assembly. The filter plate stirring assembly is driven by the forward-moving driving assembly, a rotary stirring mode and a static filtering mode are alternately switched in the moving process, waste water is stirred to drive the floating type throwing assembly to move up and down, and dynamic and uniform throwing of chemicals is achieved. According to the equipment, the mixing effect is optimized through a double stirring mode, purified water and waste residues are separated by the filter plate assembly after precipitation, and precipitates are pushed to be intensively discharged during deslagging. The device solves the problems of non-uniform medicament mixing and low precipitation efficiency in the traditional process, has the advantages of high automation degree, thorough separation, energy conservation and environmental protection, and is suitable for efficient treatment of electroplating wastewater.

The utility model discloses an electroplating wastewater collecting device, which relates to the technical field of electroplating wastewater collection, and comprises a collecting box, the top of the collecting box is fixedly connected with a top cover, the outer wall of the top cover is fixedly connected with a water inlet pipe, and one end of the water inlet pipe close to the top cover is fixedly connected with a filter cover. A conical guide plate is fixedly connected to the side, away from the water inlet pipe, of the top cover, a water storage tank is fixedly connected to the bottom of the conical guide plate, a conical funnel is fixedly connected to the bottom of the collecting tank, a heating plate is fixedly connected to the outer surface of the conical funnel, and a water outlet cylinder is fixedly connected to the bottom of the conical funnel; through the reaction mechanism and the sealing mechanism, the problems that when electroplating wastewater is collected by existing equipment and a large amount of wastewater needs to be collected and stored, a large amount of collecting boxes are used, a large amount of space is occupied, resources are wasted, and the wastewater is inconvenient to collect are solved.

The invention relates to the technical field of water pollution control and treatment, and particularly discloses electroplating wastewater heavy metal ion treatment equipment. The cathode bar is sleeved with the isolation cover provided with the multiple communicating grooves at intervals in the circumferential direction, and the annular mounting base with the lifting mechanism is slidably mounted outside the isolation cover, so that the clearing mechanism in the mounting base can dynamically clear sediments in the length direction of the cathode bar. The design of the communicating groove of the isolation hood not only allows electroplating wastewater to be in full contact with the cathode bar, but also restrains sediments in an area in the groove by limiting a fluid diffusion path, so that disordered diffusion of metal particles in the electrolytic tank is effectively prevented. And the lifting motion of the mounting seat is matched with the clearing mechanism, so that sediments on the surface of the cathode can be continuously stripped in the electrolysis process, the efficiency loss caused by shutdown clearing in a traditional aeration method is avoided, meanwhile, the secondary pollution risk of suspended sludge is reduced, and continuous and efficient recovery of heavy metal ions is realized.

The invention discloses a treatment method of electroplating wastewater, and belongs to the technical field of electroplating wastewater treatment. The process comprises the following steps: electrically adjusting the pH value of the electroplating wastewater to 2.5-4.0, adding ferrite, adopting a Ti / PbO2 anode and a graphite cathode, controlling the current density to 15-30mA / cm, introducing air, reacting for 40-80 minutes, and adjusting the pH value to 6.0-7.0 after the reaction; introducing the wastewater into a chelating resin column, wherein the chelating resin is an amino phosphonic acid type or iminodiacetic acid type; the method comprises the following steps of: introducing into a built-in filter column, loading two layers of recrystallized silicon carbide honeycomb ceramic membranes in the filter column in parallel, performing cross-flow filtration under the conditions that the operation pressure is 0.8-2.0 MPa, the temperature is 25-40 DEG C and the cross-flow velocity is 1.5-3m / s, and collecting permeate; the permeate liquid is used for backwashing every 8-12 hours of operation. According to the method, heavy metal ions in the electroplating wastewater can be effectively removed, and the treatment efficiency of the electroplating wastewater is improved.

The invention discloses an electroplating wastewater treatment decision-making system based on multi-modal data analysis, relates to the technical field of wastewater treatment, and aims to solve the problems that in the prior art, due to the lack of synchronous acquisition and analysis capability for multi-source heterogeneous data, the system is often difficult to find water quality fluctuation, equipment abnormity, process deviation and the like in time. A processing decision-making platform is taken as a core, and a multi-modal data acquisition and analysis unit, a multi-factor dynamic analysis unit and a resource scheduling analysis unit are linked to form a closed-loop decision-making process of data acquisition-dynamic analysis-resource scheduling; the processing decision platform is used as a center, triggers each unit to execute a task by sending a control signal, receives an analysis signal fed back by each unit, and outputs a final decision (such as parameter adjustment and process regulation and control) according to the signal content; the three units are clear in division of labor, data synchronous verification, medicament dynamic optimization and resource load matching are achieved in sequence, and it is ensured that the processing process is accurate, efficient and stable.

The invention discloses a grafted cellulose-based separation membrane and a preparation method thereof. The separation membrane comprises a membrane substrate containing cellulose and double grafting chains growing on the surfaces of the two sides of the membrane, the double-grafted chain comprises a Block A chain grafted to the membrane substrate and a Block B chain grafted to the end of the Block A chain; the structure of the separation membrane is as follows: a substrate-[Block A]-[Block B], a Block A chain is a block copolymerization chain containing a thiourea group and an amidoxime group, and a Block B chain is a block hydrophobic chain containing a vinyl imidazolium salt graft product. The adsorption capacity of a BlockA chain to heavy metal ions can be improved through thiourea group and amidoxime group bidentate synergistic coordination; the BlockB chain can repel harmful anions through static electricity of the vinyl imidazole onium salt and remove organic matters through hydrophobic-hydrophobic interaction. The preparation method of the separation membrane comprises the steps of double-sided activation of a membrane substrate, initiator fixation and double-sided growth of a Block A chain and a Block B chain, the Zeta potential of the obtained grafted cellulose membrane is larger than or equal to + 40 mV, the water contact angle is larger than or equal to 105 degrees, the carbon yield at 600 DEG C is larger than or equal to 30%, and the separation membrane is suitable for treatment of electroplating wastewater and other complex polluted wastewater.

The present application belongs to the technical field of wastewater treatment, and discloses a method for treating electroplating wastewater by using bioreduction of biogas slurry and combined iron bio-oxidation, which is a secondary combined use technology for removing various heavy metals in electroplating wastewater by iron bio-oxidation, comprising the following steps: (1) collecting fermentation biogas slurry, and performing ultraviolet irradiation sterilization after aeration; (2) adding potassium dichromate solution and fresh nutrient solution to the sludge system, and culturing anaerobic sludge; (3) adding treated biogas slurry to the anaerobic sludge, and repeatedly domesticating chromium-reducing microorganisms; (4) configuring a mixed solution of comprehensive electroplating wastewater and biogas slurry according to a certain proportion; (5) building a primary treatment biological reactor, and reducing Cr(VI) in wastewater by anaerobic biological reduction under the promotion of pyrite; and (6) building a secondary biological reactor filled with straw biomass charcoal, and generating iron oxides under the action of functional bacteria to continue adsorbing Cd, Cu and Ni ions in wastewater.

The invention relates to the technical field of wastewater treatment, in particular to electroplating wastewater treatment equipment and method.The electroplating wastewater treatment equipment comprises a concrete bottom plate prefabricated on the ground, a plurality of bottom beams are fixedly installed on the concrete bottom plate through bolts, and a plurality of stand columns are fixedly installed on the bottom beams through bolts; two limiting strips are arranged on the same side face of the stand column. A limiting groove is formed between the two limiting strips, an assembly plate body is clamped in the limiting groove, each limiting strip comprises a fixed part fixed to the corresponding stand column and a rotating part arranged at the lower end, each rotating part is rotationally connected to the corresponding fixed part and abuts against the assembly plate body in the corresponding limiting groove, and the length of each rotating part is the same as the height of the assembly plate body; and when the rotating part does not limit the lowermost assembly plate body any more, the corresponding assembly plate body is taken out from the position corresponding to the lowermost rotating part, and the upper assembly plate body is pushed to move downwards. The assembly plate has the effect that the assembly plate body is convenient to replace.

The utility model provides a low-concentration electroplating wastewater two-stage treatment device driven by a source heat pump, which belongs to the field of electroplating wastewater treatment and can operate at medium and low temperature without special equipment through a tower top, a hot air inlet pipeline, a heat source pump, an electroplating wastewater inlet pipeline, a pressure nozzle and a waste gas outlet pipeline. The requirement for sealing performance is low, consumables are few, the requirement for materials is not high, simplicity and convenience are achieved, and the operation cost is low; the device can be used for directly observing the whole evaporation and separation process of the evaporation and separation tower body part, so that unfavorable conditions occurring in the heat and mass transfer process can be conveniently found in time and adjusted and optimized in time; the device treats electroplating wastewater by using air as a separation carrier, and the separation carrier is convenient to obtain and is basically not limited by the environment; the device adopts the visual polyacrylate material tower body which is high in transparency, low in price and easy to machine, and the internal temperature of the tower body is lower than that of the tower top part, so that the problems of softening and deformation of organic glass caused by high temperature and the like are effectively avoided.

The application discloses an environment-friendly electroplating wastewater treatment device and relates to the technical field of wastewater treatment. The device comprises a filter box, a sealing cover is hingedly connected to the top of the filter box, a filter frame for filtering electroplating wastewater is arranged in the filter box, a stirring rod for mixing wastewater and reagents is arranged in the filter box, and a pressing plate for extruding impurities on the filter frame is slidably arranged through the sealing cover. The environment-friendly electroplating wastewater treatment device has the advantages that solid impurities in wastewater can be filtered out before the wastewater reacts with reagents through the arrangement of the filter frame; when the filter frame is full of impurities, the impurities can be compacted through the cooperation of the driving element and the pressing plate, the remaining liquid in the filter frame can be extruded, the occupied space of the impurities can be reduced, the impurities can be prevented from overflowing, the treatment of the wastewater can continue, and the treatment efficiency of the wastewater is effectively improved.

The utility model provides a kind of electroplating wastewater hexavalent chromium reduction automatic dosing control device, including pH adjusting pool, reduction reaction pool, sampling pump, video recognition system, control assembly, dosing pump and dosing tank;Reduction reaction pool is connected after pH adjusting pool;Sampling pump is connected with reduction reaction pool by sampling pipeline, and video recognition system is connected after sampling pump, and video recognition system is reconnected to reduction reaction pool by reflux pipeline after video recognition system;Video recognition system is connected with control assembly, and control assembly is connected with dosing device, so that control assembly controls dosing device according to video recognition system signal.The utility model uses video recognition system to replace ORP controller, without accurate control wastewater pH value.

The present invention relates to the technical field of electroplating wastewater treatment, and specifically relates to an electroplating wastewater recycling and treatment device, including a reaction tank. A sedimentation tank for flocculation and precipitation is arranged at the discharge end of the reaction tank. A fixing plate is welded at the middle position inside the sedimentation tank, and a hopper for storing flocculated precipitates is welded at the bottom of the sedimentation tank; A pressing plate structure that can adjust the height and the internal opening is adopted, which can realize the pre-dehydration treatment of the precipitates during the discharge of the precipitates in the sedimentation tank, reduce the time-consuming of the subsequent dehydration process, reduce the water content inside the precipitates, and at the same time use flocculants at both ends to treat the chromium-containing electroplating wastewater. The high-concentration chromium can be converted into Cr(OH)3 through flocculation and precipitation, and can be converted into Cr2O3 through high-temperature decomposition. The Cr2O3 is compounded into a polishing paste and used for polishing machine parts, and its polishing effect is better. The chromium in the electroplating wastewater is fully recycled, reducing environmental pollution.

The invention discloses a bismuth-based nanofiber photocatalytic material as well as a preparation method and application thereof, and belongs to the technical field of photocatalytic materials. The material is prepared by taking bismuth as a matrix and introducing vanadium, halogen or molybdenum elements through an electrostatic spinning and staged calcining process. The obtained material is of a three-dimensional nanofiber membrane structure, has a high specific surface area and excellent visible light response characteristics, can synchronously and efficiently photocatalytically degrade organic pollutants in electroplating wastewater and reduce and fix heavy metal ions, is easy to separate and recover, has good cycle stability, and is suitable for industrial production. And an efficient and green technical scheme is provided for deep treatment of the electroplating wastewater.

The application relates to the technical field of sampling devices, and specifically discloses a sampling device for electroplating wastewater, which comprises an adjusting tank, water outlets are communicated with the upper, middle and lower liquid surfaces of the adjusting tank, water valves are arranged at the ends of the water outlets close to the upper, middle and lower liquid surfaces of the adjusting tank, sampling pipes are communicated with the ends of the water outlets away from the adjusting tank, sampling valves are arranged on the sampling pipes, sampling boxes are arranged at the ends of the sampling pipes away from the water outlets, sampling mechanisms are arranged in the sampling boxes, the water valve at the upper liquid surface of the adjusting tank is opened, the sampling valve is opened, the electroplating wastewater can flow into the sampling pipes through the water outlets, the sampling mechanisms can respectively sample the electroplating wastewater at the upper, middle and lower liquid surfaces of the adjusting tank, and the samples can be stored in the sampling boxes, and then the sampling of the middle and lower liquid surfaces is sequentially carried out after the sampling is completed, so that the electroplating wastewater in the adjusting tank is subjected to layered sampling, the accuracy and comprehensiveness of the samples are improved, and the process control accuracy is improved.