Process for treating metal-containing waste liquid by adopting rotational flow electrodeposition technology and application

Abstract

The invention relates to the technical field of rotational flow electro-deposition, in particular to a process for treating metal-containing waste liquid by adopting a rotational flow electro-deposition technology, which comprises the following steps: removing particulate matters from the metal-containing waste liquid through a filtering device, and then recycling metal from the filtered metal-containing waste liquid through a rotational flow electro-deposition device. The rotational flow electro-deposition device comprises an electrolytic tank body, an anode shell and a plurality of cathode columns rotating synchronously, waste liquid forms rotational flow under the action of a spiral diversion trench, and metal ions are efficiently deposited on the surface of a cathode. By adopting the spiral diversion trench and the synchronously rotating cathode column structure, the waste liquid forms rotational flow in the electrolytic bath, so that the electrodeposition area of the cathode is increased, the uniform deposition of metal ions is promoted, the metal recovery efficiency and purity are improved, the manual operation intensity is greatly reduced through the cooperative control of the motor, the electric cylinder and the vacuum pump, and the production cost is reduced. The automation level of the process is improved, and the maintenance time of the cathode column is shortened.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rotational flow electrodeposition, in particular to a process and application of treating metal-containing waste liquid by rotational flow electrodeposition. BACKGROUND

[0002] With the rapid development of industrialization, the discharge amount of metal-containing waste liquid increases year by year. If these waste liquids are not properly treated and directly discharged, it will not only cause serious environmental pollution, but also lead to waste of precious metal resources. Traditional metal waste liquid treatment methods include chemical precipitation, ion exchange, adsorption and conventional electrodeposition, etc. However, these methods generally have low treatment efficiency, low metal recovery rate and high operation cost.

[0003] In recent years, rotational flow electrodeposition technology has attracted widespread attention due to its high efficiency and energy saving. This technology enhances mass transfer efficiency and reduces concentration polarization by forced fluid rotation, thereby improving metal recovery rate. However, the existing rotational flow electrodeposition device still has the following shortcomings: Insufficient pretreatment: suspended particles in waste liquid are easy to block the flow channel or adhere to the electrode surface, affecting the electrodeposition effect.

[0004] Single cathode structure: traditional devices mostly use fixed cathodes, with limited deposition area and easy formation of dendrites, reducing the purity of recovered metal.

[0005] Low degree of automation: the stripping and collection of metal deposits still require manual intervention, affecting the treatment efficiency.

[0006] In view of the above, we propose a process and application of treating metal-containing waste liquid by rotational flow electrodeposition. SUMMARY

[0007] The purpose of the present application is to provide a process and application of treating metal-containing waste liquid by rotational flow electrodeposition to solve the problems raised in the background art.

[0008] To achieve the above-mentioned purpose, the present application provides the following technical solutions: A process for treating metal-containing waste liquid by rotational flow electrodeposition, comprising removing particulate matter from the metal-containing waste liquid through a filter device, and then recovering metal from the filtered metal-containing waste liquid through a rotational flow electrodeposition device.

[0009] Preferably, the filter device comprises a box body, the top of which is provided with a first liquid inlet, and the bottom of which is provided with a first liquid outlet on one side, and the inside of the box body is rotatably provided with a filter cover.

[0010] Preferably, the box bottom is provided with a first motor, the inside bottom of the box is rotatably provided with a connecting rod, a first threaded hole is formed in the top end of the connecting rod, the output end of the first motor is fixedly connected with the connecting rod, a cover plate is clamped on the top of the box, the liquid inlet is formed on the cover plate, a sleeve is rotatably connected to the bottom of the liquid inlet, a connecting column is connected to the bottom end of the filter cover, an external thread is formed in the bottom end of the connecting column, the external thread is matched with the first threaded hole, a connecting pipe is connected to the top end of the filter cover, and the connecting pipe is matched with the sleeve.

[0011] Preferably, the rotating flow electrodeposition device comprises an electrolytic tank body, a recovery tank is connected to the bottom of the electrolytic tank body, an upper end cover is connected to the top end of the electrolytic tank body, a partition plate is arranged at the bottom end of the electrolytic tank body, a second liquid inlet is arranged at the bottom of the side wall of the electrolytic tank body, the second liquid inlet is connected with the first liquid outlet through a pump and a pipeline, a second liquid outlet is arranged at the top of the side wall of the electrolytic tank body, an anode shell is fixedly arranged on the inner wall of the electrolytic tank body, a plurality of synchronously rotating cathode columns are arranged in the middle of the electrolytic tank body, a spiral-shaped flow guide groove is arranged between the anode shell and the cathode columns, and the anode shell and the cathode columns are electrically connected with the positive and negative poles of an external power supply.

[0012] Preferably, the recovery tank is internally provided with a circular truncated cone-shaped support column, a plurality of clamping grooves are rotatably arranged on the top side of the support column, a cathode column is arranged in each clamping groove, a first gear is sleeved outside each clamping groove, a second gear is rotatably arranged at the center of the top of the support column, the second gear is meshed with the plurality of first gears, a second motor is arranged in the support column, the output end of the second motor is fixedly connected with the center of the second gear, a first electric cylinder is fixedly installed at the bottom of the recovery tank, the output end of the first electric cylinder is fixedly connected with the bottom of the support column, and a circular truncated cone-shaped through hole is arranged in the middle of the partition plate.

[0013] Preferably, a plurality of first steps are arranged on the side surface of the support column, a plurality of second steps are arranged on the side surface of the through hole, the first steps are clamped with the second steps, an annular clamping plate is further connected to the bottom of the periphery of the support column, a plurality of annular clamping blocks are uniformly arranged on the annular clamping plate, and a plurality of annular clamping grooves are formed in the bottom of the partition plate.

[0014] Preferably, the inside of the recovery tank is symmetrically provided with a collecting groove, one side of the collecting groove is provided with a collecting opening at the top, the bottom of the collecting opening is provided with an expansion groove, the expansion groove is internally provided with a semicircular scraper, both ends of the scraper are fixedly connected with a moving block through the expansion groove, the second threaded hole is formed in the middle of the moving block, the second threaded holes in the moving blocks on the same side are threadedly connected with the same bidirectional threaded rod, both ends of the bidirectional threaded rod are rotatably connected with the inner wall of the recovery tank, the third motor is arranged outside the recovery tank, the output end of the third motor is fixedly connected with one end of the bidirectional threaded rod, the inside of the recovery tank is symmetrically provided with a guide groove, and the moving block is slidably arranged in the guide groove, and the collecting groove is further connected with a vacuum pump.

[0015] Preferably, the inside wall of the electrolytic tank body is provided with an annular plate near the top position, the annular plate is rotatably connected with a rotating disc, the bottom of the rotating disc is circumferentially and arrayedly provided with a plurality of fixing grooves, a plurality of first exhaust holes are formed through the rotating disc, a second exhaust hole is formed in the middle of the upper end cover, and the second exhaust hole is connected with a gas collecting device through a pipeline.

[0016] Preferably, the bottom of the upper end cover is symmetrically provided with a sliding guide rail, the sliding guide rail is slidably provided with an adjusting piece, and the outside of the upper end cover is provided with a second electric cylinder, and the output end of the second electric cylinder is fixedly connected with the adjusting piece.

[0017] The above-mentioned process for treating metal-containing waste liquid by adopting the cyclone electrodeposition technology is applied to the field of treating metal-containing waste liquid.

[0018] Compared with the prior art, the process has the following beneficial effects: 1. The process for treating metal-containing waste liquid by adopting the cyclone electrodeposition technology can form a cyclone in the electrolytic tank by adopting the spiral flow guide groove and the synchronously rotating cathode column structure, thereby increasing the electrodeposition area of the cathode, promoting the uniform deposition of metal ions, improving the efficiency and purity of metal recovery, realizing the synchronous rotation, lifting adjustment, automatic scraping and collection of metal deposits of the cathode column through the cooperation of the motor, the electric cylinder and the vacuum pump, greatly reducing the manual operation strength, improving the automation level of the process and reducing the maintenance time of the cathode column.

[0019] 2. The process for treating metal-containing waste liquid by adopting the cyclone electrodeposition technology can quickly remove particulate impurities in the metal-containing waste liquid by the design of the rotating filter cover, thereby significantly improving the filtration efficiency, reducing the corrosion risk of the electrode in the subsequent electrolysis process and prolonging the service life of the device.

[0020] 3. The support column and the partition plate of the process for treating metal-containing waste liquid by adopting the cyclone electrodeposition technology are tightly matched through the step and the annular clamping groove, waste liquid leakage is effectively prevented, corrosive liquid is avoided from entering the recovery tank, stable operation of the equipment and safety of the operating personnel are ensured.

[0021] 4. The process for treating metal-containing waste liquid by adopting the cyclone electrodeposition technology can flexibly adjust the size of the exhaust hole according to different waste liquid characteristics through the design of the adjusting sheet and the sliding guide rail, the application range of the process is further expanded, and the process is suitable for treatment scenes of various metal-containing waste liquids. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a schematic diagram of the overall structure of the present application; Figure 2 is a schematic diagram of the internal structure of the box body in the present application; Figure 3 is a schematic diagram of the structure of the filter cover and the connecting rod in the present application; Figure 4 is a schematic diagram of the internal structure of the electrolytic tank body and the recovery tank when the cathode column is inside the recovery tank in the present application; Figure 5 is Figure 4 is an enlarged view of structure A in the present application; Figure 6 is a schematic diagram of the internal structure of the electrolytic tank body and the recovery tank when the cathode column is inside the recovery tank in the present application; Figure 7 is a schematic diagram of the structure of the partition plate in the present application; Figure 8 is a schematic diagram of the structure of the support column and the cathode column in the present application; Figure 9 is a schematic diagram of the internal structure of the support column in the present application; Figure 10 is a schematic diagram of the structure of the rotating disc in the present application; Figure 11 is a curve of current efficiency changing with circulation flow rate in Example 2 of the present application; Figure 12 is a cyclic voltammetry curve under different circulation flow rates when the copper ion concentration is 2.5 g / L in Example 2 of the present application; Figure 13 is a curve of copper electrodeposition efficiency changing with iron ion concentration in Example 3 of the present application; Figure 14 is a cyclic voltammetry curve under different iron ion concentrations when the circulation flow rate is 200 L / h in Example 3 of the present application; Figure 15For the copper electrodeposition efficiency of different iron ion concentrations in embodiment 4 of the present application, (a), 1.5 g / L; (b), 3 g / L; (c), 4.5 g / L; (d), 6 g / L.

[0023] In the figure: 1, box; 11, first liquid inlet; 12, first liquid outlet; 13, filter cover; 14, first motor; 15, connecting rod; 151, first threaded hole; 16, cover plate; 17, sleeve; 18, connecting column; 181, external thread; 19, connecting pipe; 2, electrolytic tank body; 21, partition; 211, through hole; 2111, second step; 212, annular clamping groove; 22, second liquid inlet; 23, second liquid outlet; 24, anode shell; 25, cathode column; 26, annular plate; 27, rotating disc; 271, fixed groove; 272, first exhaust hole; 3, recovery tank; 31, support column; 311, first step; 312, annular clamping plate; 3121, annular clamping block; 32, clamping groove; 33, first gear; 34, second gear; 35, second motor; 36, first electric cylinder; 4, upper end cover; 41, second exhaust hole; 42, sliding guide rail; 43, adjusting piece; 44, second electric cylinder; 5, flow guide groove; 6, collection tank; 61, collection port; 62, telescopic groove; 63, scraper; 64, moving block; 641, second threaded hole; 65, bidirectional threaded rod; 66, third motor. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0025] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0026] In the description of the present patent, it is necessary to point out that, unless otherwise explicitly specified and limited, the terms "mount", "connect", "connect", "set" should be understood broadly, for example, it can be fixedly connected, set, or it can be detachably connected, set, or integrally connected, set. For those skilled in the art, the specific meaning of the above terms in the present patent can be understood according to the specific circumstances.

[0027] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more features. In the description of the present application, the meaning of "several" is two or more, unless otherwise explicitly specified and limited.

[0028] Embodiment 1: please refer to Figures 1-10 As shown in the technical scheme provided by the present application: A process for treating metal-containing waste liquid by using cyclone electrodeposition technology, comprising removing particulate matter from the metal-containing waste liquid through a filtering device, and then recycling the metal from the filtered metal-containing waste liquid through a cyclone electrodeposition device.

[0029] In this embodiment, as Figure 1 , 2 As shown, the filtering device comprises a box body 1, the top of the box body 1 is provided with a first liquid inlet 11, the bottom of the box body 1 is provided with a first liquid outlet 12, and the inside of the box body 1 is rotatably provided with a filter cover 13.

[0030] The metal-containing waste liquid enters the box body 1 from the first liquid inlet 11, and after being filtered by the filter cover 13, the particulate impurities therein are intercepted inside the filter cover 13, and the liquid flows out from the first liquid outlet 12.

[0031] Further, as Figure 3 As shown, the bottom of the box body 1 is provided with a first motor 14, the inside bottom of the box body 1 is rotatably provided with a connecting rod 15, the top end of the connecting rod 15 is provided with a first threaded hole 151, the output end of the first motor 14 is fixedly connected with the connecting rod 15, the top of the box body 1 is clamped with a cover plate 16, the liquid inlet 11 is provided on the cover plate 16, the bottom of the liquid inlet 11 is rotatably connected with a sleeve 17, the bottom end of the filter cover 13 is connected with a connecting column 18, the bottom end of the connecting column 18 is provided with an external thread 181, the external thread 181 is matched with the first threaded hole 151, the top end of the filter cover 13 is connected with a connecting pipe 19, and the connecting pipe 19 is matched with the sleeve 17.

[0032] It is worth mentioning that in use, the connecting column 18 at the bottom of the filter cover 13 is screwed with the connecting rod 15, and then the cover plate 16 is clamped at the top of the box body 1, at this time the sleeve 17 at the bottom of the cover plate 16 is just sleeved on the connecting pipe 19 at the top of the filter cover 13, the metal-containing waste liquid passes through the first liquid inlet 11, the connecting pipe 19 into the filter cover 13, and the filter cover 13 is driven to rotate by the first motor 14, under the action of centrifugal force, the particulate impurities in the metal-containing waste liquid are intercepted in the filter cover 13, and the liquid flows out from the first liquid outlet 12 through the filter cover 13. The pre-removal of particulate impurities by the filter cover 13 can improve the electrolysis efficiency and reduce the electrode corrosion. After use, the filter cover 13 can also be easily disassembled for cleaning.

[0033] In the present embodiment, as shown in Figure 1 、 4 -6, the cyclone electrodeposition device comprises an electrolytic tank body 2, a recovery tank 3 connected at the bottom of the electrolytic tank body 2, an upper end cover 4 connected at the top end of the electrolytic tank body 2, a partition plate 21 provided at the bottom end of the electrolytic tank body 2, a second liquid inlet 22 provided at the bottom of the side wall of the electrolytic tank body 2, the second liquid inlet 22 being connected with the first liquid outlet 12 through a pump (not shown in the figure) and a pipeline, a second liquid outlet 23 provided at the top of the side wall of the electrolytic tank body 2, an anode shell 24 fixedly provided on the inner wall of the electrolytic tank body 2, a plurality of synchronously rotating cathode columns 25 provided in the middle of the electrolytic tank body 2, a spiral-shaped flow guide groove 5 provided between the anode shell 24 and the cathode columns 25, and the anode shell 24 and the cathode columns 25 being electrically connected with the positive and negative poles of an external power source, respectively.

[0034] The metal-containing waste liquid after filtration treatment enters the second liquid inlet 22 tangentially from the first liquid outlet 12 through a pump and a pipeline, spirally rises in the electrolytic tank body 2 after being guided by the flow guide groove 5, flows out through the second liquid outlet 23, and is repeatedly subjected to cyclone electrodeposition according to actual needs. Through the design of the plurality of synchronously rotating cathode columns 25, on the one hand, the area of the cathode column electrodeposition can be increased, and on the other hand, the adhesion of particulate matter can be further reduced, so that the metal deposition on the cathode column is more uniform.

[0035] Further, as shown in Figure 8 、 9As shown, the recovery tank 3 is internally provided with a circular truncated cone-shaped support column 31, a plurality of clamping grooves 32 are rotationally arranged on the top periphery of the support column 31, a cathode column 25 is arranged in the clamping groove 32, a first gear 33 is sleeved outside the clamping groove 32, a second gear 34 is rotationally arranged at the center of the top of the support column 31, the second gear 34 is respectively engaged with a plurality of first gears 33, a second motor 35 is arranged inside the support column 31, the output end of the second motor 35 is fixedly connected with the center of the second gear 34, a first electric cylinder 36 is fixedly installed at the bottom of the recovery tank 3, the output end of the first electric cylinder 36 is fixedly connected with the bottom of the support column 31, and a circular truncated cone-shaped through hole 211 is correspondingly arranged in the middle of the partition plate 21.

[0036] It is worth noting that the first electric cylinder 36 controls the lifting of the support column 31, and the support column 31 cooperates with the circular truncated cone-shaped through hole 211 to increase the sealing performance of the partition plate 21 during work, the second motor 35 controls the rotation of the second gear 34, and the second gear 34 drives a plurality of first gears 33 engaged therewith to rotate synchronously, so that a plurality of cathode columns 25 can rotate synchronously during electrolysis.

[0037] Further, as shown in the drawings, Figure 7 The side surface of the support column 31 is provided with a plurality of first steps 311, the side surface of the through hole 211 is provided with a plurality of second steps 2111, the first steps 311 are clamped with the second steps 2111, the bottom periphery of the support column 31 is further connected with an annular clamping plate 312, a plurality of annular clamping blocks 3121 are uniformly arranged on the annular clamping plate 312, and a plurality of annular clamping grooves 212 are correspondingly formed in the bottom of the partition plate 21.

[0038] Through the cooperation of the annular clamping blocks 3121 and the annular clamping grooves 212, the sealing performance of the partition plate 21 is further enhanced, and the movement of the support column 31 is positioned, after stopping work, the residual metal-containing waste liquid will flow to both sides of the circular truncated cone-shaped through hole 211, preventing the liquid with corrosive property from entering the recovery tank 3.

[0039] In this embodiment, as shown in the drawings, Figures 4-6As shown, the recycling tank 3 is internally symmetrically provided with a collecting tank 6, one side of the collecting tank 6 is provided with a collecting opening 61 at the top, the bottom end of the collecting opening 61 is provided with an expansion slot 62, the expansion slot 62 is internally provided with a semicircular scraper 63, both ends of the scraper 63 are fixedly connected with a moving block 64 penetrating through the expansion slot 62, the second threaded hole 641 is formed in the middle of the moving block 64, the second threaded holes 641 of the two moving blocks 64 on the same side are threadedly connected with the same bidirectional threaded rod 65, both ends of the bidirectional threaded rod 65 are rotatably connected with the inner wall of the recycling tank 3, the recycling tank 3 is externally provided with a third motor 66, the output end of the third motor 66 is fixedly connected with one end of the bidirectional threaded rod 65, the recycling tank 3 is internally symmetrically provided with a guide slot 67, the moving block 64 is slidingly arranged in the guide slot 67, and the collecting tank 6 is further connected with a vacuum pump.

[0040] When the cathode column 25 needs to be maintained, the power supply is turned off, the metal-containing waste liquid is stopped from being delivered into the electrolytic tank body 2, the supporting column 31 is lowered by the first electric cylinder 36, the plurality of cathode columns 25 are continuously controlled to rotate synchronously by the second motor 35, the bidirectional threaded rod 65 is controlled to rotate by the third motor 66, so that the two moving blocks 64 are close to each other, the movement of the moving block 64 is limited by the guide slot 67, and the scraper 63 is moved towards the cathode column 25 to abut against the cathode column 25, so that the deposited metal recovery on the cathode column 25 is scraped off and enters the collecting tank 6 for recycling. After the deposits on the cathode column 25 are scraped off, the first electric cylinder 36 can be quickly reset for work, which greatly reduces the maintenance time of the cathode column 25.

[0041] In the embodiment, the annular plate 26 is arranged on the inner wall of the electrolytic tank body 2 close to the top position, the rotating disc 27 is rotatably connected to the annular plate 26, a plurality of fixed slots 271 are circumferentially arranged on the bottom of the rotating disc 27, a plurality of first exhaust holes 272 are formed in the rotating disc 27, a second exhaust hole 41 is formed in the middle of the upper end cover 4, and the second exhaust hole 41 is connected with a gas collecting device through a pipeline.

[0042] The fixed slots 271 on the bottom of the rotating disc 27 facilitate further fixation of the cathode column 25, and the rotating disc 27 facilitates electrical connection of the cathode column 25 with the negative electrode of the external power supply.

[0043] Further, the upper end cover 4 is symmetrically provided with a sliding guide rail 42 at the bottom, the sliding guide rail 42 is slidingly provided with an adjusting piece 43, and the upper end cover 4 is externally provided with a second electric cylinder 44, and the output end of the second electric cylinder 44 is fixedly connected with the adjusting piece 43.

[0044] The size of the second exhaust hole 41 can be adjusted by controlling the movement of the adjusting piece 43 on the sliding guide rail 42 through the second electric cylinder 44, further expanding the application range of the device.

[0045] Example 2: Based on Example 1, application of treating copper-containing waste liquid by cyclone electrodeposition technology.

[0046] Under the experimental conditions of copper ion concentration of 2.5 g / L, pH value of 2, and current of 3.8 A, the electrodeposition time was 1 hour, and the electrodeposition experiments were carried out under the conditions of circulating flow rates of 100 L / h, 200 L / h, 300 L / h, 400 L / h, and 500 L / h. The electrodeposition efficiencies under different circulating flow rates are shown in Figure 11 . The cyclic voltammograms under different circulating flow rates are shown in Figure 12 .

[0047] When the circulating flow rate was 200 L / h, a more obvious reduction peak appeared. When the circulating flow rate increased, the copper electrodeposition efficiency also increased, which indicated that the electrolytic efficiency of copper could be improved by increasing the circulating flow rate.

[0048] Example 3: Based on Examples 1 and 2, the influence of iron ion concentration on copper electrodeposition efficiency.

[0049] The copper ion concentration was constant at 2.5 g / L, the circulating flow rate was constant at 200 L / h, and the current was constant at 3.8 A. The experiments were carried out under the conditions of iron ion concentrations of 1.5 g / L, 3 g / L, 4.5 g / L, and 6 g / L. The curve of copper ion electrodeposition efficiency changing with iron ion concentration is shown in Figure 13 . The cyclic voltammograms under different iron ion concentrations are shown in Figure 14 .

[0050] When the circulating flow rate was fixed at 200 L / h, the cyclic voltammograms under different iron ion concentrations appeared a more obvious reduction peak when the iron ion concentration was 0 g / L. It can be known from Figure 13 and Figure 14 that in order to obtain high-purity copper electrodeposition products, the concentration of iron ions should be reduced as much as possible to reduce the interference of iron ions on electrodeposition.

[0051] Example 4: Based on Examples 1-3, the influence of circulating flow rate on copper electrodeposition efficiency when containing iron ions.

[0052] The copper ion concentration was fixed at 2.5 g / L, the iron ion concentrations were fixed at 1.5 g / L, 3 g / L, 4.5 g / L, and 6 g / L, the current was constant at 3.8 A, and the experiments were carried out under the conditions of circulating flow rates of 100 L / h, 200 L / h, 300 L / h, 400 L / h, and 500 L / h. The curve of copper electrodeposition efficiency changing with circulating flow rate is shown in Figure 15As shown.

[0053] From the analysis, when the iron ion concentration is low (1.5 g / L), the current is constant at 3.8 A, and the copper electrodeposition efficiency gradually increases with the increase of the circulation flow rate; when the iron ion concentration is high (3 g / L, 4.5 g / L, and 6 g / L, respectively), the current is constant at 3.8 A, and at this time the copper electrodeposition efficiency first increases and then decreases with the increase of the circulation flow rate.

[0054] If the iron ion concentration is kept below a certain level, the copper electrodeposition efficiency will gradually increase with the increase of the circulation flow rate; when the iron ion concentration exceeds the value, the copper electrodeposition efficiency first increases and then gradually decreases with the increase of the circulation flow rate. This shows that a certain flow rate can accelerate the replenishment of copper ions around the electrode and promote the formation of copper crystal nucleus; however, too high flow rate will promote the conversion between ferrous ions and ferric ions, thereby affecting the efficiency of copper electrodeposition.

[0055] The above shows and describes the basic principles, main features and advantages of the present application. It should be understood by those skilled in the art that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only preferred examples of the present application and are not intended to limit the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A process for treating metal-containing effluents by means of a cyclonic electrodeposition technique, characterized in that, The application discloses a metal-containing waste liquid filtering device and a cyclone electrodeposition device.

2. The process for treating metal containing effluents by employing the technique of whirl flow electrodeposition as claimed in claim 1 wherein, The filtering device comprises a box body (1), a first liquid inlet (11) arranged at the top of the box body (1), a first liquid outlet (12) arranged at one side of the bottom of the box body (1), and a filter cover (13) rotatably arranged in the box body (1).

3. The process for treating metal containing effluents by employing the technique of whirl electro-deposition as claimed in claim 2 wherein, The bottom of the box body (1) is provided with a first motor (14), the inside bottom of the box body (1) is rotatably provided with a connecting rod (15), the top end of the connecting rod (15) is provided with a first threaded hole (151), the output end of the first motor (14) is fixedly connected with the connecting rod (15), the top of the box body (1) is provided with a cover plate (16), the liquid inlet (11) is arranged on the cover plate (16), the bottom of the liquid inlet (11) is rotatably connected with a sleeve (17), the bottom end of the filter cover (13) is connected with a connecting column (18), the bottom end of the connecting column (18) is provided with an external thread (181), the external thread (181) is matched with the first threaded hole (151), the top end of the filter cover (13) is connected with a connecting pipe (19), and the connecting pipe (19) is matched with the sleeve (17).

4. The process for treating metal containing effluents by employing the technique of whirl flow electrodeposition as claimed in claim 2 wherein, The cyclone electrodeposition device comprises an electrolytic tank body (2), a recovery tank (3) connected to the bottom of the electrolytic tank body (2), an upper end cover (4) connected to the top end of the electrolytic tank body (2), a partition plate (21) arranged at the bottom end of the electrolytic tank body (2), a second liquid inlet (22) arranged at the bottom of the side wall of the electrolytic tank body (2), the second liquid inlet (22) being connected with the first liquid outlet (12) through a pump and a pipeline, a second liquid outlet (23) arranged at the top of the side wall of the electrolytic tank body (2), an anode shell (24) fixedly arranged on the inner wall of the electrolytic tank body (2), a plurality of synchronously rotating cathode columns (25) arranged in the middle of the electrolytic tank body (2), a spiral-shaped flow guide groove (5) arranged between the anode shell (24) and the cathode columns (25), and the anode shell (24) and the cathode columns (25) being electrically connected with the positive and negative poles of an external power source.

5. The process for treating metal containing effluents by employing the technique of whirl electro-deposition as claimed in claim 4 wherein, The inside of the recovery tank (3) is provided with a circular-truncated-cone-shaped support column (31), a plurality of clamping grooves (32) are rotatably arranged at the top of the periphery of the support column (31), the clamping grooves (32) are provided with the cathode columns (25), the clamping grooves (32) are provided with first gears (33) in a sleeved mode, a second gear (34) is rotatably arranged at the top center of the support column (31), the second gear (34) is meshed with the plurality of first gears (33) respectively, the inside of the support column (31) is provided with a second motor (35), the output end of the second motor (35) is fixedly connected with the center of the second gear (34), a first electric cylinder (36) is fixedly arranged at the bottom of the recovery tank (3), the output end of the first electric cylinder (36) is fixedly connected with the bottom of the support column (31), and a circular-truncated-cone-shaped through hole (211) is arranged in the middle of the partition plate (21).

6. The process for treating metal containing effluents by employing the technique of whirl electro-deposition as claimed in claim 5 wherein, The support column (31) is provided with a plurality of first steps (311) on the side, the through hole (211) is provided with a plurality of second steps (2111) on the side, the first step (311) is clamped with the second step (2111), the support column (31) is further connected with an annular clamping plate (312) on the bottom of the side, a plurality of annular clamping blocks (3121) are uniformly arranged on the annular clamping plate (312), and a plurality of annular clamping grooves (212) are correspondingly formed in the bottom of the baffle (21).

7. The process for treating metal containing effluents by employing the technique of whirl electro-deposition as claimed in claim 5 wherein, The collecting groove (6) is provided with a collecting opening (61) at the top of the opposite side, a telescopic groove (62) is arranged at the bottom of the collecting opening (61), a semicircular scraper (63) is arranged in the telescopic groove (62), the scraper (63) is fixedly connected with a moving block (64) at both ends through the telescopic groove (62), a second threaded hole (641) is formed in the middle of the moving block (64), the same double-threaded rod (65) is threadedly connected in the second threaded holes (641) of the two moving blocks (64) located on the same side, and both ends of the double-threaded rod (65) are rotationally connected to the inner wall of the recovery tank (3). The recovery tank (3) is provided with a third motor (66) outside, the output end of the third motor (66) is fixedly connected with one end of the double-threaded rod (65), the recovery tank (3) is symmetrically provided with a guide groove (67) inside, and the moving block (64) is slidingly arranged in the guide groove (67). The collecting groove (6) is further connected with a vacuum pump.

8. The process for treating metal containing effluents by employing the technique of whirl electro-deposition as claimed in claim 4 wherein, The annular plate (26) is arranged on the inner wall of the electrolytic tank body (2) near the top, the rotary disc (27) is rotationally connected to the annular plate (26), a plurality of fixed grooves (271) are circumferentially arranged on the bottom of the rotary disc (27), a plurality of first exhaust holes (272) are formed through the rotary disc (27), and a second exhaust hole (41) is formed in the middle of the upper end cover (4). The second exhaust hole (41) is connected with a gas collecting device through a pipeline.

9. The process for treating metal containing effluents by employing the technique of whirl electro-deposition as claimed in claim 8 wherein, The upper end cover (4) is symmetrically provided with a sliding guide rail (42) at the bottom, the sliding guide rail (42) is slidingly provided with an adjusting piece (43), and the upper end cover (4) is provided with a second electric cylinder (44) outside. The output end of the second electric cylinder (44) is fixedly connected with the adjusting piece (43).

10. The application of the process for treating metal-containing waste liquid by adopting the rotational flow electrodeposition technology according to any one of claims 1-9 in the field of treating metal-containing waste liquid.

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