Electroplating wastewater treatment equipment and treatment process thereof

Abstract

The application discloses an electroplating wastewater treatment equipment and a treatment process thereof. The electroplating wastewater treatment equipment comprises a coagulation reaction tank and an inclined plate sedimentation tank. The inclined plate sedimentation tank comprises a main body part and a hopper part. The hopper part is located below the main body part. A partition wall plate separates the space inside the main body part into a water inlet area and an inclined plate sedimentation area. An inclined plate assembly is arranged in the inclined plate sedimentation area. The top of the main body part corresponding to the inclined plate sedimentation area is provided with a clear liquid drainage pipe. The bottom of the hopper part is provided with a blowdown pipe. The blowdown pipe is provided with a blowdown switch valve. The inclined plate sedimentation tank is provided with a movable partition plate and a lifting mechanism. The lifting mechanism comprises a lifting driving element and a traction rope. The lifting driving element lifts the movable partition plate through the traction rope. The inner peripheral wall of the hopper part is provided with a stepped surface. When the movable partition plate is located at the lower limit position, the plate surface of the movable partition plate faces vertically, and the peripheral side edge of the movable partition plate abuts against the stepped surface. The application can reduce the discharge of excessive water along with the sludge under the premise that the inclined plate sedimentation tank can discharge the sludge as soon as possible.

Description

Technical Field

[0001] This application relates to the field of wastewater treatment technology, and in particular to an electroplating wastewater treatment device and its treatment process. Background Technology

[0002] Electroplating wastewater treatment refers to the treatment of waste liquid or wastewater discharged from electroplating plants. Commonly used chemical methods for electroplating wastewater treatment include neutralization precipitation, neutralization coagulation precipitation, oxidation, reduction, barium salt method, and ferrite method. Chemical treatment methods for electroplating wastewater have simple equipment, low investment, and wide application.

[0003] In the process of electroplating wastewater treatment, the sediments in the wastewater are often separated by sedimentation in inclined plate sedimentation tanks. Compared with other sedimentation facilities, inclined plate sedimentation tanks have the advantages of low mechanical failure rate, safe operation and reliability. However, inclined plate sedimentation tanks also have some disadvantages.

[0004] In inclined plate sedimentation tanks, sediments concentrate at the bottom. As the water flows, it dilutes the sludge while simultaneously resuspending the solids. To reduce the amount of solids suspended by the flowing liquid, the sediment in the sedimentation tank needs to be discharged promptly. However, frequent discharge of sediment from the bottom of the inclined plate sedimentation tank results in an excessively high water content in the discharged sludge, affecting the efficiency of the subsequent sludge filter press. Conversely, while discharging sediment when there is a significant accumulation of sludge at the bottom of the sedimentation tank can reduce the water content of the discharged sludge, it can also cause the supernatant discharged from the sedimentation tank to carry solid matter, which is detrimental to biofilm filtration. Summary of the Invention

[0005] In order to reduce excessive water discharge with the sludge while ensuring that the inclined plate sedimentation tank can discharge sludge as quickly and timely as possible, and to dilute the sludge, this application provides an electroplating wastewater treatment equipment and its treatment process.

[0006] The electroplating wastewater treatment equipment and treatment process provided in this application adopt the following technical solution:

[0007] An electroplating wastewater treatment device includes a coagulation reaction tank and an inclined plate sedimentation tank. The inclined plate sedimentation tank includes a main body and a hopper section, with the hopper section located below the main body. A partition wall is provided inside the main body, dividing the space inside the main body into an inlet zone and an inclined plate settling zone. The inlet zone receives wastewater discharged from the coagulation reaction tank. An inclined plate assembly is provided in the inclined plate settling zone. A clear liquid drain pipe is provided at the top of the main body corresponding to the inclined plate settling zone, and a sewage discharge pipe is provided at the bottom of the hopper section. The sewage discharge pipe is equipped with a sewage discharge switch valve. The inclined plate sedimentation tank... The pool is equipped with a movable partition and a lifting mechanism for moving the movable partition up and down. The lifting mechanism is located in the water inlet area of ​​the main body. The lifting mechanism includes a lifting drive and a traction rope. The lifting drive lifts the movable partition through the traction rope. The inner peripheral wall of the hopper is provided with a stepped surface. When the movable partition is at the lower limit position, the plate-shaped surface of the movable partition faces vertically, and the peripheral edge of the movable partition abuts against the stepped surface. When the movable partition is at the upper limit position, the movable partition is located in the water inlet area, and the plate-shaped surface of the movable partition faces horizontally.

[0008] By adopting the above technical solution, the wastewater from the coagulation reaction tank is discharged into the inclined plate sedimentation tank. After a certain period of time, the lifting mechanism is activated to slowly lower the movable baffle. When the movable baffle touches the stepped surface, its lower edge stops, while its upper edge continues to descend, causing the movable baffle to gradually tilt until its peripheral edge touches the lower limit of the stepped surface. At this point, the lifting mechanism is closed. Then, the sludge discharge valve is opened to discharge the sludge accumulated in the hopper. During the sludge discharge process, the movable baffle discharges the sludge. The space within the hopper is divided vertically by a stepped surface. The liquid above the movable baffle is blocked by the baffle, preventing large amounts of liquid from being discharged during the sludge removal process. Furthermore, as the sludge is discharged from the drain valve, the pressure difference between the upper and lower sides of the movable baffle gradually increases, causing the liquid above to gradually press against the baffle, thus improving the sealing effect between the baffle and the stepped surface. After the sludge in the hopper is discharged, the drain valve is closed, and the lifting mechanism is activated, causing the movable baffle to rise back to its upper limit. By using the movable baffle to temporarily divide the space within the hopper, timely sludge discharge is facilitated, reducing the likelihood of sediment being carried aloft by the flowing liquid in the inclined plate sedimentation tank. Even with a low sludge content in the hopper, the discharged sludge is less likely to have excessively high moisture content, thus improving the efficiency of the subsequent sludge filter press.

[0009] Optionally, the hopper section is provided with a vent pipe, one end of which is connected to the hopper section, the part of the hopper section connected to the vent pipe is lower than the stepped surface, the other end of the vent pipe extends upward, and a venting switch valve is provided at the end of the vent pipe near the hopper section.

[0010] By adopting the above technical solution, when discharging sludge by using the movable partition to separate the upper and lower spaces of the hopper, the vent valve is first opened. In this way, when the sludge discharge valve is opened, the vent pipe, the lower space of the hopper, and the sludge discharge pipe form a passage. The upper port of the vent pipe and the discharge port of the sludge discharge pipe form an air pressure balance, so that the sludge in the hopper can be discharged more smoothly.

[0011] Optionally, the clear liquid drain pipe is connected to a bypass pipe, the bypass pipe is connected to the vent pipe, and the bypass pipe is equipped with a water inlet switch valve.

[0012] By adopting the above technical solution, after the hopper completes the sewage discharge, the sewage discharge switch valve is closed, and then the water inlet switch valve is opened. The bypass pipe introduces part of the clear liquid discharged from the clear liquid drain pipe into the hopper. Then the vent switch valve and the water inlet switch valve are closed. At this time, the clear liquid accumulates in the space below the movable partition in the hopper, so that the pressure difference between the upper and lower sides of the movable partition is close to the balance. This makes it less likely to scrape the stepped surface during the subsequent process of the movable partition rising and resetting, which is beneficial to protecting the movable partition and the stepped surface.

[0013] Optionally, a three-way valve is provided at the end of the vent pipe away from the hopper, and the three-way valve is connected to a water intake pipe. The end of the water intake pipe away from the three-way valve is used to extend below the liquid surface in the inclined plate settling zone.

[0014] By adopting the above technical solution and switching the three-way valve, the connection status between the vent pipe and the water intake pipe can be controlled. When the vent pipe and the water intake pipe are connected, the hopper section is performing sewage discharge. As the sludge is discharged, a negative pressure is easily formed in the hopper section, which causes the water intake pipe to automatically draw the clear liquid from the inclined plate settling zone. The clear liquid is then used to flush the sludge in the hopper section and the sewage discharge valve. The water intake pipe draws the clear liquid from the clear liquid tank through the siphon effect, thus cleaning the sewage discharge valve.

[0015] Optionally, the movable partition is used to abut against one side of the stepped surface, which is defined as a sealing surface, and the sealing surface is provided with a sealing element.

[0016] By adopting the above technical solution, the movable partition abuts against the stepped surface through the sealing element, thereby strengthening the sealing effect between the movable partition and the stepped surface, and further reducing the seepage of liquid above the movable plate through the gap between the movable partition and the stepped surface.

[0017] Optionally, the sealing element is a sealing ring with a circular cross-section. The sealing surface of the movable partition is provided with an installation groove for installing the sealing ring. The cross-section of the installation groove is trapezoidal. The diameter of the sealing ring is smaller than the bottom width of the installation groove and larger than the opening width of the installation groove. The depth of the installation groove is smaller than the diameter of the sealing ring.

[0018] By adopting the above technical solution, the sealing ring is pressed into the installation groove by extrusion deformation. Since the groove width is smaller than the diameter of the sealing ring, the sealing ring is kept in the installation groove. A detachable connection is formed between the sealing ring and the installation groove, making it easier to replace when the sealing ring ages.

[0019] Optionally, the sidewall of the coagulation reaction tank near the inclined plate sedimentation tank also serves as the sidewall of the inclined plate sedimentation tank.

[0020] By adopting the above technical solution, the coagulation reaction tank and the inclined plate sedimentation tank share a side wall, which simplifies the connection between the coagulation reaction tank and the inclined plate sedimentation tank. Moreover, compared with the conventional pipeline connection method, the wastewater discharged from the coagulation reaction tank can directly enter the inclined plate sedimentation tank without considering the problem of pipeline blockage between the coagulation reaction tank and the inclined plate sedimentation tank.

[0021] Optionally, the partition wall panel is provided with a horizontal support strip on the side near the water inlet area. The length direction of the horizontal support strip is parallel to the surface of the partition wall panel. The cross-section of the horizontal support strip is semi-circular, and the arc surface of the horizontal support strip faces away from the partition wall panel. The horizontal support strip is used to support the movable partition. When the movable partition is at its upper limit position, the horizontal support strip is located below the movable partition.

[0022] By adopting the above technical solution, when the movable partition is in the upper limit position, the lower edge of the movable partition abuts against the surface of the horizontal support bar, so that part of the weight of the movable partition acts on the horizontal support bar, which helps to reduce the load on the lifting mechanism; when the lifting mechanism lowers the movable partition, the movable partition slides away from the horizontal support bar along the arc surface of the horizontal support bar.

[0023] Optionally, the hopper includes an upper part and a lower part, with a frame plate connecting the upper part and the lower part, and the upward-facing surface of the frame plate serving as the stepped surface.

[0024] By adopting the above technical solution, the upper part and the lower part of the bucket are connected by a frame plate. The upward-facing surface of the frame plate serves as a stepped surface, so that the bucket does not need to have a large wall thickness to form a stepped surface.

[0025] A treatment process for electroplating wastewater treatment equipment includes an inclined plate sedimentation tank in which the discharge cycle is determined according to different electroplating processes. When determining the discharge cycle of the inclined plate sedimentation tank, sludge is discharged under the premise of using movable partitions to separate the hopper section. The discharge cycle is determined by the water content of the sludge discharged in a single discharge, and the water content of the sludge is determined with reference to the weight of sludge per unit volume.

[0026] By adopting the above technical solutions, the amount of precipitate produced per unit time varies depending on the electroplating process. Therefore, it is necessary to formulate an appropriate sewage discharge cycle based on different electroplating processes and actual sewage discharge conditions.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. By using movable partitions to temporarily separate the upper and lower spaces within the hopper section, it is easier to discharge sludge from the hopper section in a timely manner. This reduces the likelihood of the liquid flowing in the inclined plate sedimentation tank carrying up sediment, and even if the sludge content in the hopper section is low, it is less likely to cause the discharged sludge to have excessively high water content, thus improving the working efficiency of the subsequent sludge filter press.

[0029] 2. The bypass pipe introduces part of the clear liquid discharged from the clear liquid drain pipe into the hopper section, so that the pressure difference between the upper and lower sides of the movable partition is close to the balance, thus making it less likely to scrape the stepped surface during the subsequent rising and resetting of the movable partition, which helps to protect the movable partition and the stepped surface. Attached Figure Description

[0030] Figure 1 This is a schematic diagram illustrating the state of the hopper section separated by the movable partition in this embodiment.

[0031] Figure 2 This is a schematic diagram illustrating the state of the movable partition leaving the hopper section in this embodiment.

[0032] Figure 3 yes Figure 2 A magnified view of a portion of point A in the middle.

[0033] Explanation of reference numerals in the attached figures:

[0034] 10. Inclined plate sedimentation tank; 1. Main body; 11. Inlet area; 12. Inclined plate settling area; 13. Inclined plate assembly; 2. Hopper section; 21. Upper part of hopper; 22. Lower part of hopper; 23. Frame plate; 231. Stepped surface; 3. Partition wall; 31. Horizontal support bar; 4. Clear liquid drain pipe; 5. Sewage pipe; 51. Sewage discharge switch valve; 6. Movable partition; 61. Lifting mechanism; 611. Lifting drive component; 612. Traction rope; 613. Sealing ring; 614. Mounting groove; 7. Vent pipe; 71. Vent switch valve; 72. Three-way valve; 8. Bypass pipe; 81. Water intake switch valve; 9. Water intake pipe; 20. Coagulation reaction tank. Detailed Implementation

[0035] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0036] This application discloses an electroplating wastewater treatment device and its treatment process. (Refer to...) Figure 1 and Figure 2 The electroplating wastewater treatment equipment includes a coagulation reaction tank 20 and an inclined plate sedimentation tank 10. The side wall of the coagulation reaction tank 20, which is close to the side wall of the inclined plate sedimentation tank 10, also serves as the side wall of the inclined plate sedimentation tank 10. The inclined plate sedimentation tank 10 includes a main body 1 and a hopper 2. The hopper 2 is located below the main body 1. A partition wall 3 is provided inside the main body 1. The partition wall 3 divides the space inside the main body 1 into an inlet zone 11 and an inclined plate settling zone 12. The inlet zone 11 is used to receive the wastewater discharged from the coagulation reaction tank 20. An inclined plate assembly 13 is provided in the inclined plate settling zone 12. A clear liquid drain pipe 4 is provided at the top of the main body 1 corresponding to the inclined plate settling zone 12. A sewage pipe 5 is provided at the bottom of the hopper 2. The sewage pipe 5 is equipped with a sewage discharge switch valve 51.

[0037] The inclined plate sedimentation tank 10 is provided with a movable partition 6 and a lifting mechanism 61 for driving the movable partition 6 to rise and fall. The lifting mechanism 61 is located in the water inlet area 11 of the main body 1. The lifting mechanism 61 includes a lifting drive 611 and a traction rope 612. The lifting mechanism is specifically a winch, and the traction rope 612 is the wire rope of the winch. The traction rope 612 is connected to one side of the movable partition 6. The lifting drive 611 lifts the movable partition 6 through the traction rope 612. The inner peripheral wall of the hopper section 2 is provided with a stepped surface 231.

[0038] The lifting drive unit 611 drives the movable partition 6 to move up and down via the traction rope 612. When the movable partition 6 is at the lower limit position, the plate-shaped surface of the movable partition 6 faces vertically, and the peripheral edge of the movable partition 6 abuts against the stepped surface 231. When the movable partition 6 is at the upper limit position, the movable partition 6 is located in the water inlet area 11, and the plate-shaped surface of the movable partition 6 faces horizontally.

[0039] When it is necessary to discharge the sludge settled at the bottom of the inclined plate sedimentation tank 10, the movable partition 6 is first hoisted down to a state that is in contact with the stepped surface 231 using the lifting mechanism 61. The movable partition 6 separates the space above and below the hopper section 2. Then, the sewage discharge valve 51 is opened to allow the sludge inside the hopper section 2 to be discharged from the sewage discharge pipe 5. During this process, the wastewater above the movable partition 6 is blocked by the movable partition 6 and is not easily discharged directly with the sludge in large quantities.

[0040] Reference Figure 2 and Figure 3 The movable partition 6 has a sealing surface defined on one side that abuts against the stepped surface 231. The sealing surface is provided with a sealing element, which is used to seal the gap between the movable partition 6 and the stepped surface 231. The sealing element is a sealing ring 613 with a circular cross-section. The sealing surface of the movable partition 6 is provided with a mounting groove 614 for installing the sealing ring 613. The mounting groove 614 has a trapezoidal cross-section. The diameter of the sealing ring 613 is smaller than the bottom width of the mounting groove 614 and larger than the opening width of the mounting groove 614. The depth of the mounting groove 614 is smaller than the diameter of the sealing ring 613. A detachable connection is formed between the sealing ring 613 and the mounting groove 614, making it easier to replace when the sealing ring 613 ages.

[0041] Reference Figure 2 and Figure 3 A horizontal support bar 31 is provided on the side of the partition wall panel 3 near the water inlet area 11. The length direction of the horizontal support bar 31 is parallel to the surface of the partition wall panel 3, and the cross-section of the horizontal support bar 31 is semi-circular. The arc surface of the horizontal support bar 31 faces away from the partition wall panel 3. When the movable partition 6 is in the upper limit position, the horizontal support bar 31 supports the movable partition 6 to reduce the load on the lifting mechanism 61. When the lifting mechanism 61 lowers the movable partition 6, the movable partition 6 slides away from the horizontal support bar 31 along the arc surface of the horizontal support bar 31.

[0042] Reference Figure 1 The hopper section 2 includes an upper hopper body 21 and a lower hopper body 22. A frame plate 23 is integrally connected between the upper hopper body 21 and the lower hopper body 22. The outer peripheral edge of the frame plate 23 is connected to the lower edge of the upper hopper body 21, and the inner peripheral edge of the frame plate 23 is connected to the upper edge of the lower hopper body 22. The upward-facing surface of the frame plate 23 serves as a stepped surface 231.

[0043] Reference Figure 2 The hopper section 2 is provided with a vent pipe 7. One end of the vent pipe 7 is connected to the side wall of the lower part 22 of the hopper body, and the other end of the vent pipe 7 extends upward. A venting switch valve 71 is provided at the end of the vent pipe 7 near the hopper section 2.

[0044] When the hopper section 2 is discharging sludge in a state separated by the movable partition 6, the venting valve 71 is opened to create an air pressure balance between the port of the venting pipe 7 and the port of the sludge discharge pipe 5, so that the sludge in the hopper section 2 can be discharged more smoothly.

[0045] Reference Figure 2 A bypass pipe 8 is connected between the vent pipe 7 and the clear liquid drain pipe 4. The bypass pipe 8 is equipped with a water inlet valve 81. After the hopper section 2 is discharged, before the movable partition 6 is lifted and reset, the water inlet valve 81 is opened to guide the clear liquid in the clear liquid drain pipe 4 into the hopper section 2, so that the hopper section 2 is filled with clear liquid, thereby reducing the pressure difference between the upper and lower sides of the movable partition 6 and reducing the resistance when the movable partition 6 is lifted.

[0046] Reference Figure 2 A three-way valve 72 is provided at one end of the vent pipe 7 away from the hopper section 2. Two opposite ports of the three-way valve 72 are connected to sections of the vent pipe 7. The other port of the three-way valve 72 is connected to a water intake pipe 9. The end of the water intake pipe 9 away from the three-way valve 72 is used to extend from top to bottom into the liquid surface below the inclined plate settling zone 12.

[0047] By switching the three-way valve 72, the connection status between the vent pipe 7 and the water intake pipe 9 can be controlled. When the hopper section 2 discharges sewage in the state where the vent pipe 7 and the water intake pipe 9 are connected, a negative pressure is easily formed in the hopper section 2 as the sludge is discharged, so that the water intake pipe 9 continuously draws the clear liquid in the clear liquid tank in a siphon manner, so that the sewage discharge switch valve 51 can achieve a better cleaning effect.

[0048] The implementation principle of an electroplating wastewater treatment device according to an embodiment of this application is as follows: the wastewater that has undergone coagulation reaction in the coagulation reaction tank 20 is discharged into the inclined plate sedimentation tank 10; after a certain period of time, the lifting mechanism 61 is activated in the inclined plate sedimentation tank 10 to lower the movable partition 6 to the state of abutting the stepped surface 231, that is, the movable partition 6 is at the lower limit position, and then the lifting mechanism 61 is closed; then the sewage discharge switch valve 51 and the ventilation switch valve 71 are opened to discharge the sludge accumulated in the hopper section 2. During the sludge discharge process, the movable partition 6 divides the space in the hopper section 2 vertically from the stepped surface. The liquid above the movable partition 6 is blocked by the movable partition 6, so that the liquid above the movable partition 6 is not easily discharged in large quantities along with the sludge discharge process.

[0049] After the sludge in the hopper section 2 is discharged, close the drain valve 51 and open the water inlet valve 81 on the bypass pipe 8 to divert the clear liquid in the clear liquid drain pipe 4 to the hopper section 2, so that the water pressure on the upper and lower sides of the movable partition 6 tends to be balanced. Then close the diversion valve and the ventilation valve 71, and then open the lifting mechanism 61 to make the lifting mechanism 61 drive the movable partition 6 to rise back to the upper limit position.

[0050] By using movable partition 6 to temporarily separate the upper and lower spaces inside the hopper section 2, it is convenient to discharge the sludge inside the hopper section 2 in a timely manner, thereby reducing the situation where the liquid flowing in the inclined plate sedimentation tank 10 carries up the sediment. In addition, even if the sludge content in the hopper section 2 is low, it is not easy to cause the discharged sludge to have excessive water content, which helps to improve the working efficiency of the subsequent sludge filter press.

[0051] Additionally, it should be noted that the vent pipe 7 is also equipped with a three-way valve 72 and a water intake pipe 9. The three-way valve 72 controls the connection between the vent pipe 7 and the water intake pipe 9. When the vent pipe 7 and the water intake pipe 9 are connected, a negative pressure easily forms inside the hopper section 2 during sewage discharge. This allows the water intake pipe 9 to siphon the clear liquid from the inclined plate settling zone 12, thus cleaning the sludge in the hopper section 2 and the sewage discharge control valve. The switching frequency of the three-way valve 72 is lower than the sewage discharge frequency of the inclined plate sedimentation tank 10 to reduce the excessive dilution of sludge by clear liquid. Furthermore, when using the three-way valve 72, it is not necessary to open the diversion switch valve to replenish clear liquid inside the hopper section 2.

[0052] This embodiment also discloses a treatment process for an electroplating wastewater treatment device:

[0053] The discharge cycle of the inclined plate sedimentation tank 10 of the electroplating wastewater treatment equipment is determined according to different electroplating processes. When determining the discharge cycle of the inclined plate sedimentation tank 10, sludge is discharged under the premise of using the movable partition 6 to separate the hopper section 2 (2). The discharge cycle is determined by the water content of the sludge discharged once. The water content of the sludge is determined with reference to the weight of sludge per unit volume.

[0054] In addition, under the same electroplating process conditions, after adjusting the electroplating work intensity, the appropriate sewage discharge cycle is determined by comparing it with the standard work intensity.

[0055] Different electroplating processes produce varying amounts of precipitates per unit time. Therefore, it is necessary to determine appropriate wastewater discharge cycles based on different electroplating processes and actual wastewater discharge conditions. Furthermore, for the same electroplating process, the wastewater discharge cycle should be adjusted accordingly when the work intensity varies.

[0056] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An electroplating wastewater treatment device, characterized in that: The utility model relates to a sludge dewatering device, including coagulation reaction pool (20) and inclined plate sedimentation tank (10), the inclined plate sedimentation tank (10) includes main part (1) and hopper part (2), the hopper part (2) is located below the main part (1), the inside of main part (1) is equipped with partition wall board (3), the partition wall board (3) separates the space of the inside of main part (1) into water inlet area (11) and inclined plate subsidence area (12), water inlet area (11) is used for receiving the wastewater of coagulation reaction pool (20) discharge, the inside of inclined plate subsidence area (12) is equipped with inclined plate subassembly (13), the top of main part (1) is equipped with clear liquid drain pipe (4) corresponding inclined plate subsidence area (12), the bottom of hopper part (2) is equipped with blowdown pipe (5), and the blowdown pipe (5) is equipped with blowdown switch valve (51). The inclined plate sedimentation tank (10) is provided with a movable partition (6) and a lifting mechanism (61) for driving the movable partition (6) to move up and down, the lifting mechanism (61) is located in the water inlet area (11) of the main body (1), the lifting mechanism (61) includes a lifting drive (611) and a traction rope (612), the lifting drive (611) lifts the movable partition (6) through the traction rope (612), the inner circumferential wall of the hopper part (2) is provided with a stepped surface (231), when the movable partition (6) is located at the lower limit, the plate surface of the movable partition (6) faces vertically, and the peripheral edge of the movable partition (6) abuts against the stepped surface (231), when the movable partition (6) is located at the upper limit, the movable partition (6) is located in the water inlet area (11), and the plate surface of the movable partition (6) faces horizontally. The hopper part (2) is provided with an air pipe (7), one end of the air pipe (7) is connected to the hopper part (2), the part of the hopper part (2) connected to the air pipe (7) is lower than the stepped surface (231), the other end of the air pipe (7) extends upward, and the end of the air pipe (7) close to the hopper part (2) is provided with an air switch valve (71). The other end of the air pipe (7) away from the hopper part (2) is provided with a three-way valve (72), the three-way valve (72) is connected with a water taking pipe (9), and the end of the water taking pipe (9) away from the three-way valve (72) is used to extend below the liquid level of the inclined plate subsidence area (12).

2. The electroplating wastewater treatment apparatus according to claim 1, characterized by: The clear liquid drain pipe (4) is connected with a bypass pipe (8), the bypass pipe (8) communicates with the air pipe (7), and the bypass pipe (8) is provided with a water diversion switch valve (81).

3. The electroplating wastewater treatment apparatus according to claim 1, characterized by: The side of the movable partition (6) for abutting against the stepped surface (231) is defined as a sealing surface, the sealing surface is provided with a sealing element, and the sealing element is used for sealing the gap between the stepped surface (231) and the movable partition (6).

4. The electroplating wastewater treatment apparatus according to claim 3, characterized by: The sealing member is a sealing ring (613), the cross section of the sealing ring (613) is circular, the sealing surface of the movable partition plate (6) is provided with a mounting groove (614) for mounting the sealing ring (613), the cross section of the mounting groove (614) is trapezoidal, the diameter of the sealing ring (613) is smaller than the bottom width of the mounting groove (614) and larger than the slot width of the mounting groove (614), and the depth of the mounting groove (614) is smaller than the diameter of the sealing ring (613).

5. The electroplating wastewater treatment apparatus according to claim 1, wherein: The coagulation reaction tank (20) is close to the side wall of the inclined plate sedimentation tank (10) and simultaneously serves as the side wall of the inclined plate sedimentation tank (10).

6. The electroplating wastewater treatment apparatus according to claim 1, wherein: The side of the partition plate (3) close to the water inlet area (11) is provided with a horizontal support strip (31); the length direction of the horizontal support strip (31) is parallel to the surface of the partition plate (3), the cross section of the horizontal support strip (31) is semicircular, the arc surface of the horizontal support strip (31) faces away from the partition plate (3), and the horizontal support strip (31) is used for supporting the movable partition plate (6); when the movable partition plate (6) is located at the upper limit position, the horizontal support strip (31) is located below the movable partition plate (6).

7. The electroplating wastewater treatment apparatus according to claim 1, wherein: The hopper part (2) comprises a hopper upper part (21) and a hopper lower part (22), a frame-shaped plate (23) is connected between the hopper upper part (21) and the hopper lower part (22), and the upward surface of the frame-shaped plate (23) serves as the stepped surface (231).

8. The treatment process of the electroplating wastewater treatment equipment according to any one of claims 1-7, characterized in that: The inclined plate sedimentation tank (10) of the electroplating wastewater treatment equipment determines the sludge discharge period according to different electroplating processes; when determining the sludge discharge period of the inclined plate sedimentation tank (10), the sludge is discharged under the premise that the hopper part (2) is separated by the movable partition plate (6), the sludge discharge period is determined by the water content of single sludge discharge, and the water content of the sludge is determined with reference to the weight of the sludge per unit volume.

Images