Energy-saving and efficient electroplating nickel-copper-containing wastewater treatment device

Abstract

The invention discloses an energy-saving and efficient electroplating nickel-copper-containing wastewater treatment device, relates to the technical field of wastewater treatment, and aims to solve the problem that the adsorption efficiency is influenced by local loss caused by non-uniform particle size distribution of resin in a resin adsorption process. On one hand, automatic compaction of resin particles under the pressure difference is realized by the compaction moving assemblies which are arranged in the adsorption tank body and the exchange column in parallel, and the purpose of adsorbing and purifying the electroplating nickel-copper-containing wastewater and forming tight contact between the resin particles and achieving uniform particle size distribution is achieved; the resin particles can complete adsorption replacement from the whole to local concentration in the adsorption treatment process, and continuous collection and supplement of the invalid resin particles are realized; and under the combination of the two, the resin particles are automatically replaced and supplemented under the non-stop state, so that the sealing operation reliability in the electroplating nickel-copper-containing wastewater treatment process is achieved, and the adsorption efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to an energy-efficient and high-performance device for treating nickel-copper electroplating wastewater. Background Technology

[0002] Nickel-copper wastewater generated by the electroplating industry is a typical source of heavy metal pollution. Its high toxicity and bioaccumulation pose a serious threat to the ecological environment. Although traditional chemical precipitation methods can effectively remove free heavy metals, the treatment efficiency for complexed heavy metals (such as EDTA complexes) is significantly reduced, and the effluent is difficult to consistently meet the standard requirements. Resin adsorption technology, due to its advantages such as high selectivity and resource recovery, has become a key technology direction for the deep treatment of electroplating wastewater.

[0003] However, in the resin adsorption process, the resin bed structure design does not adequately consider fluid dynamics, the reliability of conventional sealing systems decreases during long-term operation, and uneven resin particle size distribution leads to local loss, which in turn exacerbates pressure fluctuations during equipment start-up and shutdown, ultimately affecting resin adsorption efficiency. Therefore, this application proposes a solution. Summary of the Invention

[0004] The purpose of this invention is to provide an energy-saving and efficient electroplating nickel-copper wastewater treatment device to solve the problem of uneven resin particle size distribution during resin adsorption, which leads to local loss and thus affects adsorption efficiency.

[0005] The objective of this invention can be achieved through the following technical solution: an energy-saving and efficient electroplating nickel-copper wastewater treatment device, comprising an adsorption tank and an exchange column arranged in parallel, wherein a central tube is provided in the middle of the adsorption tank that does not contact the bottom wall, and a dense moving component for self-distribution of resin particles is provided outside the central tube; and an ejector connected to the adsorption tank is provided in the exchange column for continuous replenishment of resin particles from the exchange column to the adsorption tank. The compact moving assembly includes a perforated upper plate, a partition plate, and a lower plate spaced apart on the outside of the central tube. A collecting cylinder is installed on one side of the bottom of the partition plate through a settling hole, and an alignment hole adapted to the bottom of the collecting cylinder is installed on the opposite side of the bottom of the lower plate.

[0006] The configuration is further defined as follows: a rotating rod is rotatably mounted in the middle of the exchange column, and floating vanes are mounted on both the central tube and the rotating rod, with the spiral feed direction of the floating vanes facing downwards.

[0007] The device is further configured such that: a water distributor is provided on the top of the adsorption tank, and a water distribution pipe is installed through the bottom outer side of the water distributor, with water distribution holes evenly opened on the bottom side of the water distribution pipe.

[0008] The central tube is further configured such that a drain plug is installed on the inner side of the bottom end of the central tube, and a rotating rod extending through the adsorption tank to the outside is installed on the lower end of the central tube corresponding to the drain plug.

[0009] The device is further configured such that: a filling pipe is installed between the upper ends of the adsorption tank and the exchange column; the injector is disposed in the filling pipe and its two ends are respectively connected to the interior of the adsorption tank and the exchange column; a nozzle is installed on the feed side of the injector; the nozzle has an umbrella-shaped structure and its inner diameter gradually decreases along the feed direction; and a mixing chamber is provided on the discharge side of the injector corresponding to the nozzle.

[0010] The injector is further configured such that a throat and a diffuser are sequentially installed on the outer side of the mixing chamber. The inner end of the throat has the same inner diameter as the front end of the nozzle and is aligned with it. The inner diameter of the opening of the diffuser is larger than its inner end, and the diffuser is aligned with the throat.

[0011] A further configuration is provided: a booster water pump is installed at the top of the exchange column, and the output end of the booster water pump is located on the side away from the ejector, for injecting resin particles in the exchange column into the adsorption tank through the ejector.

[0012] The adsorption tank is further configured such that a discharge port is installed on one side of the bottom of the adsorption tank, and the upper end of the central tube extends through the water distributor to the outside of the adsorption tank.

[0013] The upper plate, partition plate, and lower plate are all equipped with through holes and their outer walls are in contact with the inner wall of the adsorption tank. The partition plate is connected to the central tube and rotates counterclockwise with the central tube.

[0014] The present invention has the following beneficial effects: 1. On the one hand, the compaction and moving components arranged in parallel in the adsorption tank and exchange column realize the automatic compaction of resin particles under pressure difference, forming a close contact between the adsorption and purification of electroplating nickel-copper wastewater and the resin particles, and achieving the purpose of uniform particle size distribution. On the other hand, through the resin distribution method with changeable settling position, the resin particles can complete the adsorption and replacement from the whole to the local concentration during the adsorption treatment process, realizing the continuous collection and replenishment of exhausted resin particles. With the combination of the two, the resin particle replacement and replenishment action is automatically carried out without stopping the machine, thereby achieving the reliability of sealed operation in the treatment process of electroplating nickel-copper wastewater and improving the adsorption efficiency.

[0015] 2. During the adsorption process, the buoyancy vanes rotate with the central tube and continuously press the resin particles downwards, ensuring that the resin particles maintain a downward settling trend. This results in a denser bond between the resin particles, leading to a better adsorption effect. Furthermore, during the replenishment of resin particles, the central tube continues to rotate, driving the partition plate to rotate as well. This allows the collecting cylinders on the partition plate to change position until they align with the alignment holes, thereby collecting and transporting the reduced-size, expired resin particles, ultimately completing the replacement process and ensuring continuous and uniform resin adsorption. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a bottom view diagram of the present invention; Figure 3 This is a partial cross-sectional schematic diagram of the present invention; Figure 4 This is a side sectional view of the present invention; Figure 5 This is a side sectional view of the orientation change of the gathering cylinder according to the present invention; Figure 6 This is a cross-sectional view of the water distributor of the present invention; Figure 7 This is a cross-sectional view of the injector of the present invention.

[0018] In the diagram: 1. Adsorption tank; 2. Exchange column; 3. Central tube; 4. Rotating rod one; 5. Booster pump; 6. Water distributor; 7. Discharge port; 8. Rotating rod two; 9. Filling pipe; 10. Floating vane; 11. Upper plate; 12. Divider plate; 13. Lower plate; 14. Settling hole; 15. Alignment hole; 16. Gathering cylinder; 17. Ejector; 18. Nozzle; 19. Mixing chamber; 20. Throat; 21. Diffuser; 22. Water distribution pipe; 23. Water distribution hole; 24. Drain plug. Detailed Implementation

[0019] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0020] Example 1: To address the problem of uneven resin particle size distribution during resin adsorption, leading to localized loss and thus affecting adsorption efficiency, the following technical solution is proposed: Reference Figure 1 - Figure 7 As shown, an energy-saving and efficient electroplating nickel-copper wastewater treatment device in this embodiment includes an adsorption tank 1 and an exchange column 2 arranged in parallel. A central tube 3 that does not contact the bottom wall is provided in the middle of the adsorption tank 1. A dense moving component for the self-distribution of resin particles is provided outside the central tube 3. An ejector 17 connected to the adsorption tank 1 is provided in the exchange column 2 for the continuous replenishment of resin particles from the exchange column 2 to the adsorption tank 1. This embodiment provides an adsorption treatment scheme for electroplating wastewater containing nickel and copper. Specifically, the adsorption tank 1 is filled with resin particles that can automatically compact, and the exchange column 2 is stably stored to continuously replenish the resin particles. When the resin particles in the adsorption tank 1 have uneven particle size distribution after adsorption, they can be quickly selected and separated, ensuring that the resin particles always maintain a uniform particle size during the adsorption process. This provides a uniform adsorption effect, reduces the problem of increased pressure fluctuations during equipment start-up and shutdown caused by local loss of resin particles, and improves resin adsorption efficiency.

[0021] The compact moving assembly includes a perforated upper plate 11, a partition plate 12, and a lower plate 13 spaced apart on the outside of the central tube 3. A collection cylinder 16 is installed on one side of the bottom of the partition plate 12 through a settling hole 14. An alignment hole 15 adapted to the bottom of the collection cylinder 16 is installed on the opposite side of the bottom of the lower plate 13. Specifically, the compaction and movement component allows the adsorption tank 1 to be divided into sections, enabling dynamic adjustment of the resin particles in the adsorption tank 1 through a process of first dividing and then compacting. When uneven particle size distribution occurs during adsorption, the rotatable collection cylinder 16 quickly collects and transfers the resin particles to the bottom. Then, the exchange column 2 automatically pressurizes the resin particles, and the ejector 17 replenishes and replaces them. The entire replacement process is automatic, which can compensate for the uneven particle size distribution caused by resin failure. After the resin fails, the particle size becomes smaller, allowing for continuous collection. The exchange column 1 then sprays the replenished resin particles. During this process, automatic compaction and replenishment can be carried out in a timely manner when the resin fails, reducing the probability that pressure fluctuations caused by local loss will ultimately affect resin adsorption.

[0022] Basic principle: On the one hand, the compaction moving components set in parallel in the adsorption tank 1 and the exchange column 2 realize the automatic compaction of resin particles under pressure difference, so that the adsorption and purification of electroplating nickel-copper wastewater and the resin particles form a close contact and achieve the purpose of uniform particle size distribution. On the other hand, through the resin distribution method with changeable settling position, the resin particles can complete the adsorption and replacement from the whole to the local concentration during the adsorption treatment process, so as to realize the continuous collection and replenishment of the exhausted resin particles. The combination of these two technologies enables the automatic replacement and replenishment of resin particles without shutting down the system, thereby ensuring reliable sealed operation in the treatment of nickel-copper plating wastewater and improving adsorption efficiency.

[0023] A filling pipe 9 is installed between the upper ends of the adsorption tank 1 and the exchange column 2. The injector 17 is installed in the filling pipe 9 and its two ends are respectively connected to the inside of the adsorption tank 1 and the exchange column 2. A nozzle 18 is installed on the feed side of the injector 17. The nozzle 18 has an umbrella-shaped structure and its inner diameter gradually decreases along the feed direction. A mixing chamber 19 is provided on the discharge side of the injector 17 corresponding to the nozzle 18. The injector 17 is equipped with a throat 20 and a diffuser 21 on the outside of the mixing chamber 19. The inner end of the throat 20 is the same as the inner diameter of the front end of the nozzle 18 and they are aligned. The inner diameter of the opening of the diffuser 21 is larger than the inner end, and the diffuser 21 is aligned with the throat 20. Specifically, the replacement process from the exchange column 2 to the adsorption tank 1 is completed by the terminal component - the injector 17. When there is high pressure in the exchange column 2, uniform spraying is completed through the spray channel composed of the nozzle 18, the mixing chamber 19, the throat 20 and the diffuser 21. During this process, it will be delivered to the adsorption tank 1 in an expanded manner to complete uniform replenishment, reducing the phenomenon of resin loss due to failure and thus incomplete adsorption.

[0024] A booster pump 5 is installed at the top of the exchange column 2. The output end of the booster pump 5 is located on the side away from the ejector 17. It is used to inject resin particles in the exchange column 2 into the adsorption tank 1 through the ejector 17. The booster pump 5 is added to enable the resin particles in the exchange column 2 to be injected into the adsorption tank 1. The exchange column 2 is rich in clean water to soak the resin particles. The booster pump 5 pressurizes the exchange column 2. Under pressure, the resin particles with clean water are continuously replenished into the adsorption tank 1 through the ejector 17.

[0025] Example 2: Refer to Figure 1 - Figure 7As shown, a rotating rod 4 is rotatably installed in the middle of the exchange column 2. A floating and sinking vane 10 is installed on both the center tube 3 and the rotating rod 4. The spiral feeding direction of the floating and sinking vane 10 is downward. A water distributor 6 is also provided on the top of the adsorption tank 1. A water distribution pipe 22 is installed through the bottom outer side of the water distributor 6. Water distribution holes 23 are evenly opened on the bottom side of the water distribution pipe 22. Among them, the electroplating nickel-copper wastewater enters the adsorption tank 1 through the water distributor 6. The water is evenly distributed by the water distribution pipe 22 and water distribution hole 23 on the water distributor 6. The wastewater is evenly sprayed onto the upper plate 11 and mixed downward with the resin particles. During the adsorption process, the floating blade 10 rotates with the central tube 3 and continuously presses the resin particles downward, so that the resin particles always maintain a downward settling trend, making the binding between the resin particles more compact and achieving a better adsorption effect. During the resin particle replenishment process, the central tube 3 is in a continuous rotating state. During the continuous rotation, it drives the partition plate 12 to rotate, so that the collecting cylinder 16 on the partition plate 12 can change its orientation until it coincides with the alignment hole 15, thereby collecting and sending out the degraded resin particles with smaller particle size, and finally completing the replacement, ensuring the continuous and uniform resin adsorption.

[0026] A drain plug 24 is installed on the inner side of the bottom end of the central tube 3. A rotating rod 8 is installed on the lower end of the central tube 3 corresponding to the drain plug 24, extending through the adsorption tank 1 to the outside. A drive motor is installed at the bottom of the rotating rod 8. The drain plug 24 has an array of strip-shaped through holes. The purified solution after adsorption is discharged through the strip-shaped through holes, which can prevent the resin particles from "escaping".

[0027] A discharge port 7 is installed on one side of the bottom of the adsorption tank 1. The upper end of the central tube 3 extends through the water distributor 6 to the outside of the adsorption tank 1. The upper plate 11, the partition plate 12 and the lower plate 13 all have through holes and their outer walls are in contact with the inner wall of the adsorption tank 1. The partition plate 12 is connected to the central tube 3 and rotates counterclockwise with the central tube 3. The drive motor drives the central tube 3 to rotate through the rotating rod 8. The central tube 3 drives the partition plate 12 to rotate, so that the resin particles in the adsorption tank 1 can be disturbed by the "slow stirring" action of the collecting cylinder 16 connected to the partition plate 12, thereby causing the failed part of the resin particles to settle into the collecting cylinder 16 until the collecting cylinder 16 is matched with the alignment hole 15 and the collection is completed. The matching time between the collecting cylinder 16 and the alignment hole 15 is determined by the volume of the resin particles, and is adjusted proportionally with the volume of the resin particles. That is, the larger the volume of the resin particles, the longer the matching time. The longer the matching time, the more resin failure particles are collected through the collecting cylinder 16, thereby achieving the purpose of adaptive replacement.

[0028] Example 3: Refer to Figure 1 - Figure 7 As shown, this embodiment combines the technical content of Embodiment 1 and Embodiment 2 to form an energy-saving and efficient method for treating electroplating nickel-copper wastewater, including the following steps: Step 1: Normal resin particles with clean water are prepared in the exchange column, while electroplating wastewater containing nickel and copper is evenly introduced into the adsorption tank 1 through the water distributor 6. Step 2: Driven by the continuously rotating central tube 3 in the adsorption tank 1, the partition plate 12 drives the collecting cylinder 16 to change position until the bottom of the collecting cylinder 16 is aligned with the alignment hole 15 and then stops, thus completing the collection of failed resin particles inside the adsorption tank 1. Step 3: In step 2, the booster pump simultaneously applies pressure to the exchange column 2, and the resin particles in the exchange column 2 are supplemented into the adsorption tank 1 through the ejector 17, so that they are always automatically kept in a dense and downward close fit in the adsorption tank 1. After the electroplating nickel-copper wastewater is fully adsorbed, it is discharged through the central pipe 3, thus completing the entire adsorption process of electroplating nickel-copper wastewater.

[0029] In summary: on the one hand, the compaction and moving components arranged in parallel in the adsorption tank 1 and the exchange column 2 realize the automatic compaction of resin particles under pressure difference, so that the adsorption and purification of electroplating nickel-copper wastewater and the resin particles form a close contact and achieve the purpose of uniform particle size distribution. On the other hand, the resin distribution method with changeable settling position enables the resin particles to complete the adsorption and replacement from the whole to the local concentration during the adsorption treatment process, so as to realize the continuous collection and replenishment of the exhausted resin particles.

[0030] The above description is merely an example and illustration of the structure of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the structure of the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.

Claims

1. An energy-saving and high-efficiency electroplating nickel-containing copper wastewater treatment device, comprising an adsorption tank (1) and an exchange column (2) arranged side by side, characterized in that, The middle part of the adsorption tank (1) is provided with a center pipe (3) not in contact with the bottom wall, the outside of the center pipe (3) is provided with a dense moving assembly for self-arrangement of resin particles, and the exchange column (2) is provided with an ejector (17) in communication with the adsorption tank (1) for continuous supplement of resin particles in the exchange column (2) to the adsorption tank (1). The dense moving assembly comprises a hole-shaped upper layer plate (11) spacedly distributed outside the center pipe (3), a partition plate (12) and a lower layer plate (13), the bottom side of the partition plate (12) is provided with an accumulation cylinder (16) through a settling hole (14), and the bottom reverse side of the lower layer plate (13) is provided with a positioning hole (15) matched with the bottom of the accumulation cylinder (16).

2. The energy-saving and high-efficiency electroplating nickel-containing copper wastewater treatment device according to claim 1, characterized in that, The middle part of the exchange column (2) is rotatably provided with a rotating rod (4), the outside of the center pipe (3) and the rotating rod (4) is provided with a sinking and floating spiral blade (10), and the spiral feeding direction of the sinking and floating spiral blade (10) is downward.

3. The energy-saving and high-efficiency electroplating nickel-containing copper wastewater treatment device according to claim 1, characterized in that, The top of the adsorption tank (1) is further provided with a water distributor (6), the bottom end outside of the water distributor (6) is provided with a water distribution pipe (22) penetratingly installed, and the bottom side of the water distribution pipe (22) is uniformly provided with a water distribution hole (23).

4. The energy-saving and high-efficiency electroplating nickel-containing copper wastewater treatment device according to claim 3, characterized in that, The inside of the bottom end of the center pipe (3) is provided with a drainage plug (24), and the lower end of the center pipe (3) corresponding to the drainage plug (24) is provided with a rotating rod (8) extending to the outside through the adsorption tank (1).

5. The energy-efficient electroplating nickel-containing copper wastewater treatment device according to claim 1, characterized in that, The upper ends of the adsorption tank (1) and the exchange column (2) are jointly provided with a filling pipe (9), the ejector (17) is arranged in the filling pipe (9) and the two ends are respectively in communication with the inside of the adsorption tank (1) and the exchange column (2), the feeding side of the ejector (17) is provided with a nozzle (18), the nozzle (18) is an umbrella-shaped structure and the inner diameter gradually decreases along the feeding direction, and the discharge side of the ejector (17) corresponding to the nozzle (18) is provided with a mixing chamber (19).

6. The energy-saving and high-efficiency electroplating nickel-containing copper wastewater treatment device according to claim 5, characterized in that, The outside of the ejector (17) corresponding to the mixing chamber (19) is sequentially provided with a throat pipe (20) and a diffusion pipe (21), the inner end of the throat pipe (20) is the same as and aligned with the inner diameter of the front end of the nozzle (18), and the opening inner diameter of the diffusion pipe (21) is larger than the inner end, and the diffusion pipe (21) is aligned with the throat pipe (20).

7. The energy-saving and high-efficiency electroplating nickel-containing copper wastewater treatment device according to claim 5, characterized in that, The top of the exchange column (2) is provided with a booster water pump (5), the output end of the booster water pump (5) is arranged on the side away from the ejector (17) for infusion of resin particles in the exchange column (2) to the adsorption tank (1) through the ejector (17).

8. The energy-saving and high-efficiency electroplating nickel-containing copper wastewater treatment device according to claim 1, characterized in that, The bottom side of the adsorption tank (1) is provided with a discharge port (7), and the upper end of the center pipe (3) extends to the outside of the adsorption tank (1) through the water distributor (6).

9. The energy-efficient electroplating nickel-containing copper wastewater treatment device according to claim 1, characterized in that, The upper layer plate (11), the partition plate (12) and the lower layer plate (13) are all provided with penetrating holes and the outside walls are all in contact with the inner wall of the adsorption tank (1), the partition plate (12) is connected with the center pipe (3) and rotates counterclockwise with the center pipe (3).

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