A recycling device for electroplating wastewater treatment

Abstract

The present application relates to the technical field of wastewater treatment, and specifically discloses a recycling device for treating electroplating wastewater, comprising a stirring mechanism, a dosage regulating mechanism, a buffer mechanism, a separation mechanism, and a post-processing mechanism. When the electroplating wastewater in the liquid storage tank enters the treatment tank, the dosage regulating mechanism will detect the metal ion concentration in the electroplating wastewater, and add an appropriate amount of precipitant according to the size of the metal ion concentration. At this time, the stirring mechanism stirs the electroplating wastewater in the stirring zone, so that the precipitant generates precipitation. The precipitation located at the bottom of the stirring zone will enter the buffer zone, and after being buffered by the buffer mechanism, it reaches the static zone, forming a distribution of upper clear liquid and lower precipitate. The separation mechanism filters the upper clear liquid and pushes the precipitate out of the treatment tank from the bottom of the treatment tank, thereby realizing the separation of the upper clear liquid and the lower precipitate, thereby realizing the recovery of metal ions in the electroplating wastewater and improving the quality of wastewater treatment.

Description

Technical Field

[0001] The present application relates to the technical field of wastewater treatment, and in particular to a recycling device for treating electroplating wastewater. Background Art

[0002] Electroplating is a process that deposits a layer of metal or alloy onto a metal or non-metal surface through an electrochemical reaction. It is widely used in industrial production to improve the corrosion resistance, conductivity, hardness, and aesthetics of workpieces. During the electroplating process, workpieces undergo multiple steps, including pre-treatment, plating, and post-treatment. Electroplating wastewater is primarily generated during these steps, particularly the rinsing process and the discharge of discarded plating solutions. This wastewater typically contains significant amounts of heavy metal ions (such as nickel, chromium, copper, and zinc), acids and bases, and other hazardous substances. Discharged without treatment poses a serious threat to the environment and ecosystems.

[0003] At present, the treatment of electroplating wastewater is widely used in the industry in a comprehensive treatment process combining physical, chemical and biological methods, among which chemical precipitation is the most common. For example, a kind of electroplating wastewater treatment recycling device disclosed in publication number CN112897754A uses ferrous sulfate solution to treat electroplating wastewater containing chromium ions, and the heavy metal ions in the wastewater are finally converted into insoluble precipitates by adding a reducing agent or a precipitant, and the precipitate is separated from the liquid by gravity. In order to achieve this goal, the treatment of wastewater usually starts from adjusting the pH value, controlling the precipitation conditions of the metal ions in the wastewater, and adding a precipitant under stirring conditions to ensure that the reaction is uniform and promotes the precipitation of metal ions. The reacted wastewater enters a static area, and the heavy metal ions form sludge by gravity sedimentation, and the supernatant is further processed or discharged.

[0004] Although chemical precipitation and its supporting processes are widely used, there is still room for improvement in wastewater treatment efficiency through structural design and operational methods. For example, the structure of traditional sedimentation tanks is typically fixed, with unclear boundaries between the static and agitated zones. The more fluid wastewater in the agitated zone can easily interfere with the static zone, preventing some sediment from fully precipitating and settling to the bottom.

[0005] At the same time, because the volume of the static area is fixed, it cannot be dynamically adjusted based on the actual concentration of metal ions in the wastewater or treatment requirements. This can lead to insufficient static area capacity or waste of resources, which is not energy-efficient and environmentally friendly. Furthermore, traditional sedimentation tanks generally rely on manual or periodic mechanical operations to remove sediment from the bottom, making it difficult to achieve continuous and efficient sediment removal. Long-term sediment accumulation further affects treatment effectiveness and operational stability, resulting in poor wastewater treatment quality. These defects and limitations in conventional technologies make the wastewater treatment process lack flexibility and intelligent control methods. Summary of the Invention

[0006] In order to dynamically treat electroplating wastewater according to the concentration of metal ions in the wastewater and improve the adaptability and efficiency of wastewater treatment, the present application provides a recycling device for electroplating wastewater treatment.

[0007] This application provides a recycling device for electroplating wastewater treatment, which adopts the following technical solutions:

[0008] A recycling device for treating electroplating wastewater, comprising a liquid storage tank and a treatment tank, wherein a connecting pipe is provided between the liquid storage tank and the treatment tank, wherein the liquid storage tank is filled with electroplating wastewater to be treated, and wherein a first one-way valve is provided in the connecting pipe for allowing the electroplating wastewater in the liquid storage tank to flow into the treatment tank in a one-way manner;

[0009] The treatment tank is divided into a stirring zone, a buffer zone and a static zone from top to bottom. The connecting pipe is connected to the inner cavity of the stirring zone of the treatment tank. The stirring zone is provided with a stirring mechanism for stirring the electroplating wastewater entering the stirring zone. The treatment tank where the stirring zone is located is provided with a dosage adjustment mechanism for adjusting the amount of precipitant added according to the concentration of metal ions in the electroplating wastewater.

[0010] The buffer zone is provided with a buffer mechanism for buffering the electroplating wastewater solution stirred in the stirring zone, the buffer mechanism can make the electroplating wastewater solution in the stirring zone stand still when it reaches the static zone, and can adjust the area ratio of the stirring zone and the static zone according to the concentration of metal ions in the electroplating wastewater;

[0011] The processing tank where the static zone is located is provided with a separation mechanism for separating the upper clear liquid and the lower sediment after static treatment. When the buffer mechanism moves toward the bottom of the processing tank, the separation mechanism separates the upper clear liquid and the lower sediment from each other.

[0012] A mud outlet is provided at the bottom of the processing tank, and a post-processing mechanism for post-processing the outflowing mud is connected to the mud outlet.

[0013] By adopting the above technical solution, when the electroplating wastewater in the liquid storage tank enters the treatment tank through the connecting pipe, it first reaches the stirring zone. At this time, the dosage adjustment mechanism will detect the metal ion concentration in the electroplating wastewater reaching the stirring zone, and then add an appropriate amount of precipitant according to the size of the metal ion concentration. At this time, the stirring mechanism stirs the electroplating wastewater in the stirring zone evenly, so that the precipitant can fully combine with the metal ions in the electroplating wastewater, thereby generating precipitation. The precipitated precipitate will rotate in the stirring zone with the stirring of the stirring mechanism, so that the precipitate is evenly distributed in the stirring zone. During the rotation process, the sediment at the bottom of the stirring zone will enter the buffer zone, and reach the static zone after being buffered by the buffer mechanism. At this time, the sediment slowly settles and gradually stratifies in the static zone, and finally forms an upper clear liquid and a lower sediment distribution. At this time, the separation mechanism filters out the upper clear liquid and pushes the sediment out of the bottom of the treatment tank to achieve separation of the upper clear liquid and the lower sediment. The separated sediment is post-processed by the post-processing mechanism and finally forms a dry solid without water, thereby realizing the recovery of metal ions in electroplating wastewater and improving the quality of wastewater treatment.

[0014] Optionally, the stirring mechanism includes a driving member and a rotating blade, the driving member is arranged on the top of the processing tank, and the output end extends into the processing tank, and the rotating blade is coaxially fixed to the output shaft of the driving member extending into the inner cavity of the processing tank.

[0015] By adopting the above technical solution, when the electroplating wastewater enters the stirring zone, the driving part is controlled to work, so that the driving part drives the rotating blades to rotate, thereby achieving stirring of the electroplating wastewater in the stirring zone, so that the precipitant can more fully combine with the metal ions in the electroplating wastewater, thereby precipitating the metal ions from the electroplating wastewater in the form of precipitates, thereby treating the electroplating wastewater.

[0016] Optionally, the dosage adjustment mechanism includes a metal ion sensor, a precipitant addition tube, a solenoid valve and a controller, the metal ion sensor is arranged in the stirring zone of the treatment tank, the precipitant addition tube is arranged at the top of the treatment tank and is connected to the stirring zone, the precipitant addition tube is equipped with a precipitant, the solenoid valve is installed at the outlet end of the precipitant addition tube, and the controller is electrically connected to the metal ion sensor and the solenoid valve, respectively.

[0017] By adopting the above technical solution, the metal ion sensor can detect the metal ion concentration in the stirring zone and transmit the concentration signal to the controller. The controller controls the opening size and opening time of the solenoid valve according to the metal ion concentration, so that an appropriate amount of precipitant is added to the stirring zone from the precipitant addition tube.

[0018] Optionally, the buffer mechanism includes a buffer seat, a connecting rod and a lifting member. The buffer seat is slidingly sealed and arranged in the processing tank. A buffer channel is opened in the middle of the buffer seat. There are multiple connecting rods. One end of each connecting rod is fixedly connected to the upper part of the buffer seat. The lifting member is arranged at the top of the processing tank, and the lifting end is fixedly connected to the other end of each connecting rod.

[0019] By adopting the above technical solution, the buffer seat can separate the stirring area and the static area, reducing the impact of the liquid in the stirring area on the sedimentation in the static area, and the lifting member can drive the buffer seat to rise and fall.

[0020] When the concentration of metal ions in electroplating wastewater is high, the stirring zone needs to provide sufficient reaction time and space to ensure that the precipitant and metal ions are fully mixed. At this time, the lifting part drives the buffer seat down to increase the volume of the stirring zone, thereby increasing the contact area between the electroplating wastewater and the precipitant, ensuring a more thorough reaction.

[0021] When the metal ion concentration in electroplating wastewater is low, the precipitation reaction completes faster. Increasing the volume of the static zone can provide more precipitation space, helping the sediment to settle more thoroughly. At this time, the lifting member drives the buffer seat up to increase the volume of the static zone, which can reduce the suspension of sediment and improve the sedimentation effect.

[0022] All of the above can better treat electroplating wastewater and further improve the quality of wastewater treatment.

[0023] Optionally, the inner diameter of the buffer channel gradually decreases from both ends to the middle.

[0024] By adopting this technical solution and designing a buffer channel with variable width, the wastewater flow rate can be controlled, allowing it to quickly pass through the stirring zone into the buffer zone while providing appropriate rest time in the static zone. By accelerating the flow rate in the middle and slowing it down at both ends, the mixing efficiency of the precipitant and wastewater is ensured, while providing sufficient residence time for the precipitation of metal ions, avoiding incomplete precipitation caused by excessive flow.

[0025] Optionally, a plurality of buffer plates are evenly and spaced apart along the circumferential direction on the top of the buffer seat, a plate surface of each buffer plate is perpendicular to the rotation direction of the liquid in the stirring zone, and a plurality of flow holes are opened on each buffer plate.

[0026] By adopting the above technical solution, a relatively static buffer zone is formed between the stirring zone and the static zone, which helps to reduce the interference of stirring on the static zone and improve the sedimentation efficiency.

[0027] Optionally, the separation mechanism includes a mounting base, a separation plate, a torsion spring, an elastic member, and a pressing rod; the mounting base is slidably arranged on the inner wall of the processing tank where the static area is located; a plurality of separation plates are provided, and one end of each separation plate is rotatably mounted on the mounting base; a plurality of torsion springs are provided corresponding to each separation plate, and each torsion spring is arranged on the axis of rotation of the separation plate, and can cause the end of the corresponding separation plate away from the mounting base to rotate toward the bottom of the buffer seat;

[0028] The elastic members are provided in multiple groups, each of which is provided on the inner wall of the processing tank where the static area is located, and one end of each elastic member is fixedly connected to the bottom of the mounting base, so as to provide a force for the mounting base to move toward the buffer seat;

[0029] The pressing rods are provided in plurality corresponding to the separation plates, and one end of each pressing rod is fixed to the bottom of the buffer seat, and the other end is directly opposite to the upper end surface of the corresponding separation plate. Each separation plate is provided with a separation hole for liquid circulation only. When each pressing rod presses the corresponding separation plate to be in the same plane, the plate surface of each separation plate divides the inner cavity of the processing tank into two parts, the upper and lower parts.

[0030] The mud outlet is provided with a second one-way valve for allowing the lower layer of sediment settled in the static area to flow out in one direction.

[0031] By adopting the above technical solution, when the buffer seat moves toward the direction close to the static area, the pressing rod will press the corresponding separation plate so that the separation plates will eventually be coplanar. At this time, each pressing rod will drive the mounting base and the separation plates to move toward the bottom of the treatment tank. At this time, the upper clear liquid in the static area passes through the separation hole to reach the upper end of each separation plate. When the separation plate reaches the separation point between the upper clear liquid and the sediment, since the upper clear liquid has all passed through the separation hole to reach the upper end of the separation plate, the sediment at the lower end of the separation plate will be pushed downward by the separation plate and finally discharged from the mud outlet, thereby realizing the separation of the upper clear liquid and the sediment. This is an operation that is automatically performed when the buffer seat adjusts the size ratio of the stirring area and the static area, making the entire solid-liquid separation more convenient.

[0032] Optionally, the post-processing mechanism includes a horizontal solid-liquid separator, a screw conveyor, a circulation reflux component, a drying component and a material collection bin arranged below the mud outlet. The mud outlet at the bottom of the processing tank is connected to the middle inner cavity of the horizontal solid-liquid separator, the screw conveyor is connected to the solid discharge end of the horizontal solid-liquid separator, the material collection bin is connected to the end of the screw conveyor, the drying component is used to dry the solid material in the screw conveyor, the circulation reflux component is connected to the liquid discharge end of the horizontal solid-liquid separator, and the circulation reflux component is used to return the liquid separated by the horizontal solid-liquid separator to the inner cavity of the processing tank in the stirring zone.

[0033] By adopting the above technical solution, the horizontal solid-liquid separator can further separate the water in the precipitate, so that the residual water can flow back to the stirring zone through the circulation reflux component, and the precipitate after further separation of water is transported to the discharge collection bin by the screw conveyor. During the transmission process, the drying component further dries the precipitate, so that the final collected precipitate contains almost no water, thereby making the separation of the precipitate more thorough.

[0034] Optionally, the drying component includes a heating element, a blower and a drying tube. The blower is used to transfer the heat generated by the heating element to the drying tube. The drying tube is connected to both ends of the screw conveyor and is used to heat and dry the solid material in the screw conveyor.

[0035] By adopting the above technical solution, the blower sends the heat generated by the heating element into the drying pipe, and the heat enters the bolt conveyor through the drying pipe for circulation, thereby finally drying the solid material transmitted in the screw conveyor.

[0036] Optionally, the circulation reflux component includes a reflux pipe and a liquid pump, one end of the reflux pipe is connected to the liquid discharge end of the horizontal solid-liquid separator, and the other end is connected to the inner cavity of the processing tank in the stirring zone. The liquid pump is arranged on the reflux pipe and is used to pump the liquid flowing out of the liquid discharge end of the horizontal solid-liquid separator back into the stirring zone.

[0037] By adopting the above technical solution, the reflux pipe can collect the separated water, and the liquid pump can pump the water in the reflux pipe back into the stirring zone, thereby realizing the recycling of water.

[0038] In summary, this application includes at least one of the following beneficial technical effects:

[0039] 1. When the electroplating wastewater in the liquid storage tank enters the treatment tank through the connecting pipe, it first reaches the stirring zone. At this time, the dosage adjustment mechanism will detect the metal ion concentration in the electroplating wastewater reaching the stirring zone, and then add an appropriate amount of precipitant according to the size of the metal ion concentration. At this time, the stirring mechanism stirs the electroplating wastewater in the stirring zone evenly, so that the precipitant can fully combine with the metal ions in the electroplating wastewater, thereby generating precipitation. The precipitated precipitate will rotate in the stirring zone with the stirring of the stirring mechanism, so that the precipitate is evenly distributed in the stirring zone. During the rotation process, the precipitate at the bottom of the stirring zone will enter the buffer zone, and after the buffering effect of the buffer mechanism, it reaches the static zone. At this time, the precipitate slowly stands still and gradually stratifies in the static zone, finally forming a distribution of an upper clear liquid and a lower precipitate. At this time, the separation mechanism filters the upper clear liquid and pushes the precipitate out of the treatment tank from the bottom of the treatment tank to achieve separation of the upper clear liquid and the lower precipitate. The separated precipitate is post-processed by the post-processing mechanism to eventually form a dry solid without moisture, thereby realizing the recovery of metal ions in the electroplating wastewater.

[0040] 2. The buffer seat can separate the stirring zone and the static zone, reducing the impact of the liquid in the stirring zone on the sedimentation and static state in the static zone, and the lifting member can drive the buffer seat to rise and fall; when the concentration of metal ions in the electroplating wastewater is high, the stirring zone needs to provide sufficient reaction time and space to ensure that the precipitant and the metal ions are fully mixed. At this time, the lifting member drives the buffer seat down to increase the volume of the stirring zone, thereby increasing the contact area between the electroplating wastewater and the precipitant and ensuring a more thorough reaction; when the concentration of metal ions in the electroplating wastewater is low, the precipitation reaction is completed faster. Increasing the volume of the static zone can provide more precipitation space, which is conducive to more thorough sedimentation of the precipitate. At this time, the buffer seat is driven up by the lifting member to increase the volume of the static zone, which can reduce the suspension of the precipitate and improve the precipitation effect;

[0041] 3. The design of the buffer channel with variable width can control the flow rate of the wastewater, allowing it to quickly pass through the stirring zone into the buffer zone while providing appropriate rest time in the static zone. By accelerating the flow rate in the middle and slowing down the flow rate at both ends, the mixing efficiency of the precipitant and wastewater is ensured, while providing sufficient residence time for the precipitation of metal ions to avoid incomplete precipitation due to excessive flow rate.

[0042] 4. Through the barrier effect of the buffer plate, a relatively static buffer zone is formed between the stirring area and the static area, which helps to reduce the interference of stirring on the static area and improve the wastewater recovery efficiency;

[0043] 5. When the buffer seat moves toward the direction close to the static area, the pressing rod will press the corresponding separation plate, so that the separation plates will eventually be coplanar. At this time, the pressing rods will drive the mounting base and the separation plates to move toward the bottom of the treatment tank. At this time, the upper clear liquid in the static area passes through the separation holes to reach the upper ends of the separation plates. When the separation plates reach the separation point between the upper clear liquid and the sediment, since all the upper clear liquid passes through the separation holes to reach the upper ends of the separation plates, the sediment at the lower ends of the separation plates will be pushed downward by the separation plates and finally discharged from the mud outlet, thereby realizing the separation of the upper clear liquid and the sediment. This is an operation automatically performed when the buffer seat adjusts the size ratio of the stirring area and the static area, making the entire solid-liquid separation more convenient, thereby improving the efficiency of wastewater recycling.

[0044] 6. The horizontal solid-liquid separator can further separate the water in the sediment, allowing the residual water to flow back to the stirring zone through the circulation reflux component. The sediment after further separation of water is transported to the discharge collection bin by the screw conveyor. During the transportation process, the drying component further dries the sediment, so that the final collected sediment contains almost no water, thereby separating the sediment more thoroughly and further improving the wastewater recovery efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0046] Figure 1 This is a schematic diagram of the overall structure of a recycling device for electroplating wastewater treatment in this embodiment;

[0047] Figure 2 yes Figure 1 Schematic diagram of part of the structure of the middle treatment tank;

[0048] Figure 3 yes Figure 2 Schematic diagram of the structure inside the intermediate treatment tank;

[0049] Figure 4 yes Figure 3 Schematic diagram of the structure of the separation mechanism.

[0050] Figure numerals: 1. liquid storage tank; 11. connecting pipe; 12. first one-way valve; 2. processing tank; 21. stirring zone; 22. buffer zone; 23. static zone; 3. stirring mechanism; 31. driving member; 32. rotating blade; 4. dosage adjustment mechanism; 5. buffer mechanism; 51. buffer seat; 511. buffer channel; 512. buffer plate; 5121. flow hole; 52. connecting rod; 53. lifting member; 6. separation mechanism; 61. mounting base; 62. separation plate; 63. elastic member; 64. pressing rod; 7. post-processing mechanism; 71. horizontal solid-liquid separator; 72. screw conveyor; 73. reflux pipe; 74. liquid suction pump; 75. heating member; 76. blower; 77. drying pipe; 78. material collection bin. DETAILED DESCRIPTION

[0051] The following is combined with Figure 1-4 , further details of this application are given.

[0052] The embodiment of the present application discloses a recycling device for treating electroplating wastewater.

[0053] Reference Figure 1 and Figure 2 A recycling device for treating electroplating wastewater includes a liquid storage tank 1 and a treatment tank 2. A connecting pipe 11 is provided between the liquid storage tank 1 and the treatment tank 2. The liquid storage tank 1 is filled with electroplating wastewater to be treated. The connecting pipe 11 is provided with a first one-way valve 12 for allowing the electroplating wastewater in the liquid storage tank 1 to flow into the treatment tank 2 in one direction.

[0054] The inside of the treatment tank 2 is divided into a stirring zone 21, a buffer zone 22 and a static zone 23 from top to bottom. The connecting pipe 11 is connected to the inner cavity of the stirring zone 21 of the treatment tank 2. The stirring zone 21 is provided with a stirring mechanism 3 for stirring the electroplating wastewater entering the stirring zone 21. The treatment tank 2 where the stirring zone 21 is located is provided with a dosage adjustment mechanism 4 for adjusting the amount of precipitant added according to the metal ion concentration in the electroplating wastewater.

[0055] A buffer mechanism 5 is provided in the buffer zone 22 for buffering the electroplating wastewater solution stirred in the stirring zone 21. The buffer mechanism 5 can make the electroplating wastewater solution in the stirring zone 21 stand still when it reaches the static zone 23, and can adjust the area size ratio of the stirring zone 21 and the static zone 23 according to the concentration of metal ions in the electroplating wastewater.

[0056] The processing tank 2 where the static zone 23 is located is provided with a separation mechanism 6 for separating the upper clear liquid and the lower sediment after static. When the buffer mechanism 5 moves toward the bottom of the processing tank 2, the separation mechanism 6 separates the upper clear liquid and the lower sediment from each other.

[0057] A mud outlet is provided at the bottom of the processing tank 2, and a post-processing mechanism 7 for post-processing the outflowing mud is connected to the mud outlet.

[0058] Reference Figure 2 and Figure 3 The stirring mechanism 3 includes a driving member 31 and a rotating blade 32. The driving member 31 is arranged on the top of the processing tank 2, and the output end extends into the processing tank 2. The rotating blade 32 is coaxially fixed on the output shaft of the driving member 31 extending into the inner cavity of the processing tank 2.

[0059] Reference Figure 1 and Figure 2 The dosage adjustment mechanism 4 includes a metal ion sensor, a precipitant addition tube, a solenoid valve and a controller. The metal ion sensor is arranged in the stirring zone 21 of the treatment tank 2. The precipitant addition tube is arranged at the top of the treatment tank 2 and is connected to the stirring zone 21. The precipitant addition tube is filled with precipitant. The solenoid valve is installed at the outlet end of the precipitant addition tube. The controller is electrically connected to the metal ion sensor and the solenoid valve respectively.

[0060] The metal ion sensor can detect the metal ion concentration in the stirring zone 21 and transmit the concentration signal to the controller. The controller controls the opening size and opening time of the solenoid valve according to the metal ion concentration, so that an appropriate amount of precipitant is added to the stirring zone 21 from the precipitant addition tube.

[0061] Reference Figure 2 and Figure 3 The buffer mechanism 5 includes a buffer seat 51, a connecting rod 52 and a lifting member 53. The buffer seat 51 is slidingly sealed and arranged in the processing tank 2. A buffer channel 511 is opened in the middle of the buffer seat 51. The inner diameter of the buffer channel 511 gradually decreases from both ends to the middle. There are multiple connecting rods 52. One end of each connecting rod 52 is fixedly connected to the upper part of the buffer seat 51. The lifting member 53 can be a hydraulic cylinder. In this embodiment, the lifting member 53 adopts a servo motor. The lifting member 53 is arranged at the top of the processing tank 2. The ends of the connecting rods 52 are connected. The ends of the lifting member 53 are coaxially fixed by a screw rod. The screw rod is threadedly connected to the connected ends of each connecting rod 52 to realize the lifting and lowering adjustment of the buffer seat 51.

[0062] The buffer seat 51 can separate the stirring area 21 and the static area 23, reducing the influence of the liquid in the stirring area 21 on the sedimentation and static state in the static area 23, and the lifting member 53 can drive the buffer seat 51 to rise and fall.

[0063] When the concentration of metal ions in the electroplating wastewater is high, the stirring zone 21 needs to provide sufficient reaction time and space to ensure that the precipitant and the metal ions are fully mixed. At this time, the lifting member 53 drives the buffer seat 51 to descend, thereby increasing the volume of the stirring zone 21, increasing the contact area between the electroplating wastewater and the precipitant, and ensuring a more thorough reaction.

[0064] When the metal ion concentration in electroplating wastewater is low, the precipitation reaction completes more quickly. Increasing the volume of the static zone 23 provides more sedimentation space, helping the sediment to settle more thoroughly. At this time, the lifting member 53 drives the buffer seat 51 upward, thereby increasing the volume of the static zone 23, reducing the suspended sediment and improving the wastewater recycling effect.

[0065] Furthermore, in order to form a relatively static buffer zone 22 between the stirring zone 21 and the static zone 23, further reduce the interference of stirring on the static zone 23 and improve the precipitation efficiency, refer to Figure 2 and Figure 3 A plurality of buffer plates 512 are evenly and spaced apart along the circumferential direction on the top of the buffer seat 51 . The surface of each buffer plate 512 is perpendicular to the rotation direction of the liquid in the stirring zone 21 , and each buffer plate 512 is provided with a plurality of flow holes 5121 .

[0066] Reference Figure 3 and Figure 4 The separation mechanism 6 includes a mounting base 61, a separation plate 62, a torsion spring, an elastic member 63 and a pressing rod 64. The mounting base 61 is slidably arranged on the inner wall of the processing tank 2 where the static area 23 is located. There are multiple separation plates 62, and one end of each separation plate 62 is rotatably mounted on the mounting base 61. There are multiple torsion springs corresponding to each separation plate 62, and each torsion spring is arranged on the axis of rotation of the separation plate 62, which can make the corresponding separation plate 62 rotate in the direction away from one end of the mounting base 61 toward the bottom of the buffer seat 51.

[0067] There are multiple groups of elastic members 63 , each of which is arranged on the inner wall of the processing tank 2 where the static area 23 is located, and one end is fixedly connected to the bottom of the mounting base 61 , for providing a force for the mounting base 61 to move toward the buffer seat 51 .

[0068] Reference Figure 3 and Figure 4 , a plurality of pressing rods 64 are provided corresponding to each separation plate 62, and one end of each pressing rod 64 is fixed to the bottom of the buffer seat 51, and the other end is directly opposite to the upper end surface of the corresponding separation plate 62. Each separation plate 62 is provided with a separation hole for liquid circulation only. When each pressing rod 64 presses the corresponding separation plate 62 to be in the same plane, the plate surface of each separation plate 62 divides the inner cavity of the processing tank 2 into two parts, the upper and lower parts;

[0069] The mud outlet is provided with a second one-way valve for allowing the lower layer of sediment settled in the static area 23 to flow out in one direction.

[0070] When the buffer seat 51 moves toward the direction close to the static area 23, the pressing rod 64 will press the corresponding separation plate 62, so that the separation plates 62 will eventually be coplanar. At this time, each pressing rod 64 will drive the mounting base 61 and each separation plate 62 to move toward the bottom of the processing tank 2. At this time, the upper clear liquid in the static area 23 passes through the separation hole to reach the upper end of each separation plate 62. When the separation plate 62 reaches the separation point between the upper clear liquid and the sediment, since the upper clear liquid has all passed through the separation hole to reach the upper end of the separation plate 62, the sediment at the lower end of the separation plate 62 will be pushed downward by the separation plate 62 and finally discharged from the mud outlet, thereby realizing the separation of the upper clear liquid and the sediment. This is an operation that is automatically performed when the buffer seat 51 adjusts the size ratio of the stirring area 21 and the static area 23, making the entire solid-liquid separation more convenient.

[0071] Reference Figure 1 and Figure 2 The post-processing mechanism 7 includes a horizontal solid-liquid separator 71, a screw conveyor 72, a circulation reflux component, a drying component and a material collection bin 78 arranged below the mud outlet. The mud outlet at the bottom of the processing tank 2 is connected to the middle inner cavity of the horizontal solid-liquid separator 71, the screw conveyor 72 is connected to the solid discharge end of the horizontal solid-liquid separator 71, the material collection bin 78 is connected to the end of the screw conveyor 72, the drying component is used to dry the solid material in the screw conveyor 72, the circulation reflux component is connected to the liquid discharge end of the horizontal solid-liquid separator 71, and the circulation reflux component is used to return the liquid separated by the horizontal solid-liquid separator 71 to the inner cavity of the processing tank 2 in the stirring zone 21.

[0072] The horizontal solid-liquid separator 71 can further separate the water in the precipitate, so that the residual water flows back to the stirring zone 21 through the circulation reflux component, and the precipitate after further separation of water is transported to the discharge collection bin 78 by the screw conveyor 72. During the transmission process, the drying component further dries the precipitate so that the final collected precipitate contains almost no water, thereby making the separation of the precipitate more thorough and further improving the wastewater recycling efficiency.

[0073] Reference Figure 1 and Figure 2 The drying assembly includes a heater 75, a blower 76, and a drying tube 77. The blower 76 is used to transfer the heat generated by the heater 75 to the drying tube 77. The heater 75 uses an electric heating wire. The drying tube 77 is connected to both ends of the screw conveyor 72 and is used to heat and dry the solid material in the screw conveyor 72. The blower 76 transfers the heat generated by the heater 75 to the drying tube 77, which then circulates into the screw conveyor, thereby finally drying the solid material conveyed by the screw conveyor 72.

[0074] Reference Figure 1 and Figure 2The circulation reflux component includes a reflux pipe 73 and a liquid pump 74. One end of the reflux pipe 73 is connected to the liquid discharge end of the horizontal solid-liquid separator 71, and the other end is connected to the inner cavity of the treatment tank 2 in the stirring zone 21. The liquid pump 74 is arranged on the reflux pipe 73 and is used to pump the liquid flowing out of the liquid discharge end of the horizontal solid-liquid separator 71 back into the stirring zone 21. The reflux pipe 73 can collect the separated water, and the liquid pump 74 can pump the water in the reflux pipe 73 back into the stirring zone 21, realizing the recycling of water.

[0075] The implementation principle of the recycling device for treating electroplating wastewater according to the embodiment of the present application is as follows: when the electroplating wastewater in the liquid storage tank 1 enters the treatment tank 2 through the connecting pipe 11, it first reaches the stirring zone 21. At this time, the dosage adjustment mechanism 4 will detect the metal ion concentration in the electroplating wastewater reaching the stirring zone 21, and then add an appropriate amount of precipitant according to the concentration of the metal ions. At this time, the stirring mechanism 3 will stir the electroplating wastewater in the stirring zone 21 evenly, so that the precipitant can fully combine with the metal ions in the electroplating wastewater, thereby generating a precipitate. The precipitated precipitate will rotate in the stirring zone 21 as it is stirred by the stirring mechanism 3, so that the precipitate is evenly distributed in the stirring zone 21.

[0076] During the rotation process, the precipitate located at the bottom layer of the stirring zone 21 will enter the buffer zone 22, and reach the static zone 23 after the buffering effect of the buffer mechanism 5. At this time, the precipitate slowly stands still and gradually stratifies in the static zone 23, and finally forms an upper clear liquid and a lower precipitate distribution. At this time, the separation mechanism 6 filters out the upper clear liquid and pushes the precipitate out of the processing tank 2 from the bottom of the processing tank 2, thereby realizing the separation of the upper clear liquid and the lower precipitate. The separated precipitate is post-processed by the post-processing mechanism 7, and finally forms a dry solid without water, thereby realizing the recovery of metal ions in electroplating wastewater.

[0077] The above are all optional embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A recycling device for electroplating wastewater treatment, characterized by: The invention comprises a liquid storage tank (1) and a treatment tank (2), wherein a connecting pipe (11) is provided between the liquid storage tank (1) and the treatment tank (2), wherein the liquid storage tank (1) is filled with electroplating wastewater to be treated, and wherein a first one-way valve (12) is provided in the connecting pipe (11) for allowing the electroplating wastewater in the liquid storage tank (1) to flow into the treatment tank (2) in a one-way manner; The treatment tank (2) is divided into a stirring zone (21), a buffer zone (22) and a precipitation zone (23) from top to bottom. The connecting pipe (11) is connected to the inner cavity of the stirring zone (21) of the treatment tank (2). The stirring zone (21) is provided with a stirring mechanism (3) for stirring the electroplating wastewater entering the stirring zone (21). The treatment tank (2) where the stirring zone (21) is located is provided with a precipitation agent regulating mechanism (4) for regulating the amount of precipitation agent added according to the concentration of metal ions in the electroplating wastewater. The buffer zone (22) is provided with a buffer mechanism (5) for buffering the electroplating wastewater solution stirred in the stirring zone (21); the buffer mechanism (5) can allow the electroplating wastewater solution in the stirring zone (21) to be stationary when it reaches the precipitation zone (23), and can adjust the area ratio of the stirring zone (21) and the precipitation zone (23) according to the concentration of metal ions in the electroplating wastewater; A separation mechanism (6) for separating the upper clear liquid and the lower sediment after precipitation is provided in the treatment tank (2) where the precipitation zone (23) is located. When the buffer mechanism (5) moves toward the bottom of the treatment tank (2), the separation mechanism (6) separates the upper clear liquid and the lower sediment from each other. The bottom of the processing tank (2) is provided with a mud outlet, and the mud outlet is connected to a post-processing mechanism (7) for post-processing the outflowing mud; The buffer mechanism (5) comprises a buffer seat (51), a connecting rod (52) and a lifting member (53); the buffer seat (51) is slidingly sealed and arranged in the processing tank (2); a buffer channel (511) is provided in the middle of the buffer seat (51); a plurality of connecting rods (52) are provided, one end of each connecting rod (52) is fixedly connected to the upper part of the buffer seat (51); the lifting member (53) is arranged on the top of the processing tank (2), and the lifting end is fixedly connected to the other end of each connecting rod (52); The separation mechanism (6) includes a mounting base (61), a separation plate (62), a torsion spring, an elastic member (63) and a pressing rod (64); the mounting base (61) is slidably arranged on the inner wall of the processing tank (2) where the sedimentation area (23) is located; a plurality of separation plates (62) are provided, one end of each separation plate (62) is rotatably mounted on the mounting base (61); a plurality of torsion springs are provided corresponding to each separation plate (62); each torsion spring is arranged on the axis of rotation of the separation plate (62), and can cause the corresponding separation plate (62) to rotate in a direction away from one end of the mounting base (61) toward the bottom of the buffer seat (51); The elastic members (63) are provided in multiple groups, each of the elastic members (63) is provided on the inner wall of the processing tank (2) where the precipitation area (23) is located, and one end of the elastic member is fixedly connected to the bottom of the mounting base (61), so as to provide the mounting base (61) with a force to move toward the buffer seat (51); A plurality of pressing rods (64) are provided corresponding to each of the separation plates (62), and one end of each pressing rod (64) is fixed to the bottom of the buffer seat (51), and the other end is directly opposite to the upper end surface of the corresponding separation plate (62). Each of the separation plates (62) is provided with a separation hole for only liquid circulation. When each of the pressing rods (64) presses the corresponding separation plate (62) to be in the same plane, the plate surface of each of the separation plates (62) separates the inner cavity of the processing tank (2) into an upper and a lower part. The mud outlet is provided with a second one-way valve for allowing the lower layer of sediment deposited in the sedimentation area (23) to flow out in one direction.

2. The electroplating wastewater treatment recycling device according to claim 1, characterized in that: The stirring mechanism (3) comprises a driving member (31) and a rotating blade (32); the driving member (31) is arranged on the top of the processing tank (2), and the output end thereof extends into the processing tank (2); the rotating blade (32) is coaxially fixed to the output shaft of the driving member (31) extending into the inner cavity of the processing tank (2).

3. The electroplating wastewater treatment recycling device according to claim 1, characterized in that: The precipitant regulating mechanism (4) comprises a metal ion sensor, a precipitant addition pipe, a solenoid valve and a controller, wherein the metal ion sensor is arranged in the stirring zone (21) of the treatment tank (2), the precipitant addition pipe is arranged at the top of the treatment tank (2) and is connected to the stirring zone (21), the precipitant addition pipe is provided with a precipitant, the solenoid valve is installed at the outlet end of the precipitant addition pipe, and the controller is electrically connected to the metal ion sensor and the solenoid valve respectively.

4. The electroplating wastewater treatment recycling device according to claim 1, characterized in that: The inner diameter of the buffer channel (511) gradually decreases from both ends to the middle.

5. The electroplating wastewater treatment recycling device according to claim 1, characterized in that: A plurality of buffer plates (512) are evenly and spaced apart along the circumferential direction on the top of the buffer seat (51), the plate surface of each buffer plate (512) is perpendicular to the rotation direction of the liquid in the stirring zone (21), and each buffer plate (512) is provided with a plurality of flow holes (5121).

6. The electroplating wastewater treatment recycling device according to claim 1, characterized in that: The post-processing mechanism (7) includes a horizontal solid-liquid separator (71) arranged below the mud outlet, a screw conveyor (72), a circulation reflux component, a drying component and a material collection bin (78), the mud outlet at the bottom of the processing tank (2) is connected to the middle inner cavity of the horizontal solid-liquid separator (71), the screw conveyor (72) is connected to the solid discharge end of the horizontal solid-liquid separator (71), the material collection bin (78) is connected to the end of the screw conveyor (72), the drying component is used to dry the solid material in the screw conveyor (72), the circulation reflux component is connected to the liquid discharge end of the horizontal solid-liquid separator (71), and the circulation reflux component is used to return the liquid separated by the horizontal solid-liquid separator (71) to the inner cavity of the processing tank (2) in the stirring zone (21).

7. The electroplating wastewater treatment recycling device according to claim 6, characterized in that: The drying assembly includes a heating element (75), a blower (76) and a drying pipe (77). The blower (76) is used to transfer the heat generated by the heating element (75) to the drying pipe (77). The drying pipe (77) is connected to both ends of the screw conveyor (72) and is used to heat and dry the solid material in the screw conveyor (72).

8. The electroplating wastewater treatment recycling device according to claim 6, characterized in that: The circulation reflux component includes a reflux pipe (73) and a liquid pump (74). One end of the reflux pipe (73) is connected to the liquid discharge end of the horizontal solid-liquid separator (71), and the other end is connected to the inner cavity of the treatment tank (2) of the stirring zone (21). The liquid pump (74) is arranged on the reflux pipe (73) and is used to pump the liquid flowing out of the liquid discharge end of the horizontal solid-liquid separator (71) back into the stirring zone (21).

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