A wastewater treatment device and method for air conditioner copper pipe manufacturing

Abstract

The present invention relates to the field of wastewater treatment technology, and discloses a wastewater treatment device and method for the manufacture of air-conditioning copper tubes, a wastewater treatment device for the manufacture of air-conditioning copper tubes, comprising a circular base and an annular base installed inside the circular base, wherein the annular base extends from the circular base, a water inlet is provided on the outside of the circular base, and the wastewater introduced by the water inlet is introduced into the interior of the circular base in a tangential direction and swirls around the annular base, and a tank is installed on the top of the circular base so that the swirling wastewater generates centrifugal force. The wastewater of the present invention forms a high-speed vortex through the tangential direction water inlet, realizes the preliminary separation of metal particles and solid impurities, and greatly reduces the subsequent processing load. The guide impeller dynamically adjusts the vortex speed, cooperates with the radial electric field to drive the directional migration of heavy metal ions, and links the electric field strength in real time to strengthen ion diffusion and synergistically improve the heavy metal retention efficiency.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to a device and method for treating wastewater from the manufacture of air conditioning copper pipes. Background Technology

[0002] In the air conditioning copper tube manufacturing industry, emulsions are used in the copper tube rolling process to reduce friction and cool the equipment. The wastewater formed after copper shavings, oil stains and other impurities are mixed with the emulsion contains high concentrations of copper ions and organic matter from the emulsion, resulting in a persistently high COD value. In the copper tube cleaning process, the cleaning water used to remove surface oil stains, debris and other contaminants mixes with the contaminants to form wastewater that contains not only copper ions, but also acidic and alkaline substances and surfactants from the cleaning agents. It is unstable in acidity and alkalinity and contains recalcitrant organic matter. In the copper tube surface treatment process, operations such as electroplating and passivation leave heavy metal ions (such as copper and zinc ions) and passivating agents in the plating solution in the wastewater, resulting in a high heavy metal content.

[0003] Current wastewater treatment technologies face numerous challenges in handling this type of wastewater. Traditional filtration techniques struggle to address metal particles and solid impurities in the wastewater, as these impurities easily clog the filtration system, leading to frequent maintenance and replacement, increased operating costs, and reduced treatment efficiency. Regarding heavy metal ion treatment, conventional methods are inefficient in intercepting and separating these ions, failing to meet increasingly stringent environmental standards; for example, the removal rates for copper and zinc ions are unsatisfactory. Therefore, this invention provides a wastewater treatment device and method for air conditioning copper pipe manufacturing wastewater. Summary of the Invention

[0004] To address the aforementioned shortcomings of existing technologies, this invention provides a wastewater treatment device and method for air conditioning copper pipe manufacturing, which uses a radial electric field to cause heavy metal ions to migrate, thereby preventing the filter element from being blocked by heavy metal ions.

[0005] The present invention provides the following technical solution: a wastewater treatment device for air conditioning copper pipe manufacturing, comprising a circular base and an annular base installed inside the circular base, wherein the annular base extends out from the circular base, an inlet is provided on the outer side of the circular base, and the wastewater introduced into the inlet is introduced into the interior of the circular base in a tangential direction and flows in a vortex around the annular base, and a tank is installed at the top of the circular base, so that the vortex-flowing wastewater generates centrifugal force, leaving metal particles and solid impurities at the edge of the tank for separation;

[0006] The annular base is equipped with a guide impeller for controlling the rotation speed, and the guide impeller is provided with an annular radial electric field. Multiple filter elements are provided in the center of the annular base. The radial electric field repels heavy metal ions around the filter elements and moves the heavy metal ions away from the filter elements. The guide impeller can control the angle of the blades to change the vortex speed of the wastewater, which washes the electrodes of the radial electric field. The centrifugal acceleration generated by the vortex causes the heavy metal ions to migrate, which works in conjunction with the electric field to enhance the interception.

[0007] The circular base is equipped with a cleaning impeller located outside the filter element, which enhances the retention efficiency of heavy metal ions and eliminates ion concentration differences.

[0008] The outer side of the annular base is provided with several sets of nitrogen nozzles. Nitrogen bubbles are introduced into the wastewater through the nitrogen nozzles to reduce the oxygen content in the wastewater, while cleaning the guide impeller, radial electric field and filter element.

[0009] Preferably, the guide impeller includes an adjusting ring seat mounted on an annular base and a connecting ring seat mounted at the bottom of the top of the tank. Several sets of plate blades arranged in an annular array are provided between the adjusting ring seat and the connecting ring seat. The two ends of the plate blades are rotatably connected to the adjusting ring seat and the connecting ring seat respectively through connecting shafts. The angle of the plate blades is adjusted by adjusting the adjusting ring seat to control the contact angle between the plate blades and the vortex wastewater.

[0010] Preferably, the adjusting ring seat includes a waterproof tank body and a rotatable external gear ring disposed inside the waterproof tank body. The interior of the waterproof tank body is provided with several sets of gears arranged in a circular array, and all sets of gears mesh with the external gear ring. The external gear ring is driven by a motor. The shaft ends of the several sets of gears extend from the top of the waterproof tank body and are connected to the connecting shaft of the plate blades. The rotation angle of the gears is controlled by the rotation of the external gear ring, thereby adjusting the angle of the plate blades.

[0011] Preferably, the radial electric field includes a titanium mesh anode and a graphene mesh cathode installed between the adjustment ring seat and the connecting ring seat, and the titanium mesh anode and the graphene mesh cathode are arranged in a ring on the inner side of several sets of plate blades. The graphene mesh cathode is located inside the titanium mesh anode. When the titanium mesh anode and the graphene mesh cathode are energized, a radial electric field is formed, causing heavy metal ions on the inner side to migrate to the outer side.

[0012] Preferably, the top portions of the titanium mesh anode and the graphene mesh cathode are insulated by an insulating coating, and the wastewater surface is located between the insulating coatings.

[0013] Preferably, the cleaning impeller includes a sealing plate detachably installed at the top port of the tank. The bottom of the sealing plate is provided with several sets of flow guide filter plates arranged in a ring array and inclined with opposite vortex directions. The bottom ends of the several sets of flow guide filter plates are equipped with fixing rings. When the vortex passes through the several sets of flow guide filter plates, it cuts into the flow guide filter plates to form turbulence that destroys the boundary layer on the surface of the filter element, so that the adsorbed heavy metal ions are flushed back to the mainstream area.

[0014] Preferably, the top of the annular base is provided with a circular boss, and the circular boss is provided with a number of filter element mounting seats arranged in a circular array. The top of the filter element is installed on the top of the sealing plate. The sealing plate is installed on the top of the tank by bolts, and the fixing ring abuts against the annular base and wraps around the circular boss. The number of filter elements are respectively located on each filter element mounting seat.

[0015] Preferably, the flow guide filter plate consists of an external rectangular frame and an internal activated carbon filter plate, and the activated carbon filter plate and the rectangular frame are designed to be detachable.

[0016] Preferably, the outer side of the circular boss is provided with a protrusion, and the inner side of the fixing ring is provided with a corresponding slot. When the slot on the fixing ring merges with the protrusion on the side of the circular boss, several sets of filter elements are respectively placed on each filter element mounting seat.

[0017] A method for treating wastewater from the manufacture of air conditioning copper pipes, the specific operation of which is as follows:

[0018] S1. Wastewater enters the circular base through the inlet and flows in a vortex around the annular base until the wastewater in the tank is vortexed. At the same time, nitrogen gas nozzles introduce nitrogen bubbles into the wastewater.

[0019] S2. Adjust the angle of the blades on the guide impeller to control the speed of the wastewater vortex, and turn on the radial electric field so that the radial electric field forms an electric field in the tank, causing the heavy metal ions on the inside to transfer to the outside.

[0020] S3. The vortex wastewater is guided by the blades of the cleaning impeller to generate turbulence, which destroys the boundary layer on the surface of the filter element, enhances the interception efficiency of heavy metal ions, eliminates the ion concentration difference, and finally the wastewater is filtered through the filter element and discharged from the bottom of the annular base.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] (1) Wastewater forms a high-speed vortex through the tangential inlet, achieving preliminary separation of metal particles and solid impurities, and significantly reducing the load on subsequent treatment. The guide impeller dynamically adjusts the vortex speed, and works in conjunction with the radial electric field to drive the directional migration of heavy metal ions, and the electric field strength is linked in real time to enhance ion diffusion and improve the heavy metal retention efficiency.

[0023] (2) The radial electric field causes the heavy metal ions on the inside to migrate to the outside, preventing the filter element from being blocked too early, extending its service life, and improving the retention efficiency of heavy metal ions. The guide impeller and the radial electric field work together to accelerate the vortex speed, which allows the heavy metal ions to diffuse more fully and increase the chances of contact with the electric field. The electric field force drives the ion migration more effectively, and the centrifugal acceleration of the vortex also helps the ion migration, thus synergistically enhancing the retention effect.

[0024] (3) The guide plate of the cleaning impeller is inclined and the vortex direction is opposite, which makes the wastewater turbulent, destroys the boundary layer on the surface of the filter element, washes away the adsorbed heavy metal ions, enhances the interception efficiency of heavy metal ions, and eliminates the ion concentration difference. The guide plate consists of an external rectangular frame and an internal activated carbon filter plate. The activated carbon filter plate is loaded with nano-zero valent iron, which can remove heavy metals and organic matter simultaneously. Moreover, the turbulent shear force is high, which can make the filtration flux recovery rate higher than that of traditional backwashing.

[0025] (4) Nitrogen nozzles introduce nitrogen bubbles into the wastewater to reduce the oxygen content in the wastewater and prevent the electrodes of the radial electric field from being oxidized. At the same time, the guide impeller, radial electric field and filter element are cleaned to form a nitrogen barrier and prevent membrane fouling caused by Fe²⁺ being oxidized to Fe³⁺. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the present invention;

[0027] Figure 2 For the present invention Figure 1 A top-view diagram of the internal structure;

[0028] Figure 3 For the present invention Figure 1 Internal structure diagram;

[0029] Figure 4 For the present invention Figure 3 Internal structure diagram;

[0030] Figure 5 This is a schematic diagram of the flow guide impeller of the present invention;

[0031] Figure 6 For the present invention Figure 5 A schematic diagram of the split structure;

[0032] Figure 7 This is a schematic diagram of the structure of the adjusting ring seat of the present invention;

[0033] Figure 8 This is a schematic diagram of the radial electric field structure of the present invention;

[0034] Figure 9 This is a schematic diagram of the cleaning impeller of the present invention;

[0035] Figure 10 For the present invention Figure 9 A schematic diagram of the split structure;

[0036] Figure 11 This is a schematic diagram of the structure of the annular base of the present invention.

[0037] In the diagram: 1. Circular base; 2. Ring base; 3. Inlet; 4. Tank; 5. Guide impeller; 6. Radial electric field; 7. Filter element; 8. Cleaning impeller; 9. Nitrogen nozzle; 51. Adjusting ring seat; 52. Connecting ring seat; 53. Plate blade; 511. Waterproof tank; 512. External gear ring; 513. Gear; 61. Titanium mesh anode; 62. Graphene mesh cathode; 63. Insulating coating; 81. Sealing plate; 82. Guide filter plate; 83. Fixing ring; 21. Circular boss; 22. Filter element mounting base. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. In order to keep the following description of the embodiments of this disclosure clear and concise, detailed descriptions of known functions and known components are omitted to avoid unnecessarily obscuring the concept of the present invention.

[0039] Please see Figure 1 and Figure 2 The wastewater treatment device for air conditioning copper pipe manufacturing of the present invention mainly consists of a circular base 1, an annular base 2, a tank 4, a guide impeller 5, a radial electric field 6, a filter element 7, a cleaning impeller 8, and a nitrogen nozzle 9.

[0040] See Figure 3 The circular base 1 is the basic support structure of the entire device, and an inlet 3 is provided on its outer side. The annular base 2 is installed inside the circular base 1 and extends out of the circular base 1. The wastewater introduced through the inlet 3 enters the interior of the circular base 1 in a tangential direction and flows in a vortex around the annular base 2. The centrifugal force generated by this vortex flow can keep metal particles and solid impurities at the edge of the tank 4, achieving preliminary separation.

[0041] Tank 4 is installed on top of circular base 1, providing a closed space for wastewater treatment, allowing the swirling wastewater to undergo subsequent treatment steps within it.

[0042] See Figure 4 and Figure 5 as well as Figure 6 The guide impeller 5 is mounted on the annular base 2, including an adjusting ring seat 51 and a connecting ring seat 52. The adjusting ring seat 51 is mounted on the annular base 2, and the connecting ring seat 52 is mounted on the bottom end of the top of the tank body 4. Several sets of plate blades 53 arranged in an annular array are provided between the adjusting ring seat 51 and the connecting ring seat 52. The two ends of the plate blades 53 are rotatably connected to the adjusting ring seat 51 and the connecting ring seat 52 respectively through connecting shafts.

[0043] See Figure 7The adjusting ring seat 51 includes a waterproof tank 511 and a rotatable external gear ring 512. The waterproof tank 511 contains several sets of gears 513 arranged in a circular array. These gears 513 mesh with the external gear ring 512, which is driven by a motor. The shaft ends of the gears 513 extend from the top of the waterproof tank 511 and connect to the connecting shaft of the plate blades 53. When the external gear ring 512 rotates, it drives the gears 513 to rotate, thereby adjusting the angle of the plate blades 53, controlling the contact angle between the plate blades 53 and the vortex wastewater, and thus changing the vortex speed of the wastewater.

[0044] The core function of the guide impeller 5 is to control the vortex speed of the wastewater. By adjusting the angle of the plate blades 53, the flow state of the wastewater can be flexibly changed. When it is necessary to enhance the treatment effect of heavy metal ions, the vortex speed can be increased to make the movement of wastewater in the tank more intense, increasing the chance of heavy metal ions interacting with the electric field; when it is necessary to perform equipment maintenance or reduce energy consumption, the vortex speed can be appropriately slowed down.

[0045] The blade angle is dynamically adjusted based on real-time feedback of heavy metal concentrations (such as Cu²+ and Zn²+) in the wastewater.

[0046] When the concentration is high (>100ppm): the blade angle is adjusted to 45°, the vortex speed is increased to 2.5m / s, which enhances ion diffusion and electric field effect, and at the same time, the electrodes of the radial electric field 6 are rinsed by the vortex water flow.

[0047] When the concentration is low (<50ppm): the blade angle is adjusted to 15°, the vortex speed is reduced to 1.0m / s, and energy consumption is reduced.

[0048] See Figure 8 The radial electric field 6 includes a titanium mesh anode 61 and a graphene mesh cathode 62 installed between the adjusting ring seat 51 and the connecting ring seat 52. The titanium mesh anode 61 and the graphene mesh cathode 62 are arranged in a ring inside several sets of plate blades 53, and the graphene mesh cathode 62 is located inside the titanium mesh anode 61.

[0049] When energized, the titanium mesh anode 61 and graphene mesh cathode 62 form a radial electric field, causing heavy metal ions on the inner side to migrate to the outer side and away from the filter element 7. At the same time, the top parts of the titanium mesh anode 61 and graphene mesh cathode 62 are insulated by an insulating coating, and the wastewater surface is located between the insulating coatings to ensure the stability and safety of the electric field.

[0050] The main function of the radial electric field 6 is to drive the directional migration of heavy metal ions using electric field force. Under the action of the electric field, the positively charged heavy metal ions will move towards the titanium mesh anode 61, thereby moving away from the filter element 7, preventing the filter element 7 from being blocked by heavy metal ions too early, extending the service life of the filter element 7, and improving the retention efficiency of heavy metal ions.

[0051] The guide impeller 5 and the radial electric field 6 work together to improve the treatment effect of heavy metal ions. When the guide impeller 5 increases the vortex speed of the wastewater, the wastewater flow becomes more vigorous, the diffusion of heavy metal ions in the water is more complete, and the contact opportunities with the radial electric field increase. The electric field force can more effectively drive the heavy metal ions to migrate outward. At the same time, the centrifugal acceleration generated by the vortex also causes heavy metal ions to migrate, synergistically enhancing the interception effect with the electric field. Conversely, when it is necessary to reduce the treatment intensity or adjust the equipment, the guide impeller 5 can slow down the vortex speed. In this case, the radial electric field can still effectively migrate and intercept heavy metal ions.

[0052] Titanium mesh anode 61: pore size 0.5 mm, surface coated with ruthenium-iridium oxide (RuO2-IrO2), which increases the oxygen evolution overpotential to 1.8 V and inhibits water electrolysis;

[0053] Graphene mesh cathode 62: It is woven with multi-layer graphene composite fibers, with a specific surface area ≥1200 m² / g, which enhances the adsorption capacity for heavy metal ions.

[0054] Annular spacing: The distance between the anode and cathode is 10 mm, and the electric field intensity gradient is designed to be 0-500 V / m (adjustable), driving the ion migration rate to 0.2 mm / s.

[0055] Insulating coating: An alumina ceramic coating is sprayed onto the area above the liquid surface, with a withstand voltage of ≥10 kV to prevent short circuits caused by electric fields.

[0056] See Figure 9 and Figure 10 The cleaning impeller 8 includes a sealing plate 81 that is detachably installed at the top port of the tank 4. The bottom of the sealing plate 81 is provided with several sets of flow guide filter plates 82 that are arranged in a ring array and are inclined with opposite vortex directions. The bottom ends of the several sets of flow guide filter plates 82 are equipped with fixing rings 83.

[0057] When the swirling wastewater passes through the cleaning impeller 8, turbulence is created after the wastewater enters through the inclined guide plate 82 and the vortex direction is opposite. This turbulence can disrupt the boundary layer on the surface of the filter element, causing heavy metal ions originally adsorbed on the surface of the filter element 7 to be flushed back into the mainstream area. At the same time, it enhances the retention efficiency of heavy metal ions and eliminates the ion concentration gradient.

[0058] During wastewater treatment, when the wastewater forms a stable vortex under the action of the guide impeller 5 and enters the area where the cleaning impeller 8 is located, the cleaning impeller 8 begins to function. The wastewater comes into contact with the guide filter plate 82, and due to the special design of the guide filter plate 82, the flow direction and velocity of the wastewater change, thus forming turbulence. The formation of turbulence disrupts the boundary layer on the surface of the filter element 7, causing heavy metal ions adsorbed on the surface of the filter element 7 to lose their adhesion conditions and be reintroduced into the mainstream wastewater. Simultaneously, this turbulence makes the electric field within the entire tank more uniform and effective in its effect on heavy metal ions, further improving the retention efficiency of heavy metal ions. The guide filter plate 82 consists of an external rectangular frame and an internal activated carbon filter plate, and the activated carbon filter plate and the rectangular frame are designed to be detachable for easy replacement and maintenance.

[0059] The guide filter plate 82 in the radial electric field 6 is tilted at an angle of 30° to the horizontal plane, and the vortex directions of adjacent filter plates are opposite (alternating between clockwise and counterclockwise), forming strong turbulence with a local Reynolds number Re > 5000;

[0060] Activated carbon filter plate: pore size 5 μm, loaded with nano-zero valent iron (nZVI), which converts Cr(VI) to Cr(III) through chemical reduction, and removes heavy metals and organic matter simultaneously.

[0061] The turbulent shear force reaches 2.5 N / m², which peels off the deposits on the surface of the filter element, resulting in a filtration flux recovery rate of >95% (compared to 80% for traditional backwashing).

[0062] Several sets of nitrogen nozzles 9 are provided on the outer side of the annular base 2. Nitrogen bubbles are introduced into the wastewater through the nitrogen nozzles 9 to reduce the oxygen content in the wastewater and prevent the electrodes of the radial electric field 6 from being oxidized. At the same time, the guide impeller 5, the radial electric field 6 and the filter element 7 are cleaned to form a nitrogen barrier and prevent membrane fouling caused by the oxidation of Fe²+ to Fe³+.

[0063] See Figure 11 The annular base 2 has multiple filter elements 7 in the center for further filtration of wastewater after preliminary treatment and electric field action. The top of the annular base 2 has a circular boss 21, on which several sets of filter element mounting seats 22 are arranged in a circular array. The top of the filter element 7 is mounted on the top of the sealing plate 81, which is bolted to the top of the tank body 4. The fixing ring 83 abuts against the annular base 2 and wraps around the circular boss 21, so that the several sets of filter elements 7 are located on each filter element mounting seat 22.

[0064] The outer side of the circular boss 21 has a protrusion, and the inner side of the fixing ring 83 has a corresponding slot. When the slot on the fixing ring 83 merges with the protrusion on the side of the circular boss 21, several sets of filter elements 7 are respectively placed on each filter element mounting seat 22. In this way, each filter element 7 can be aligned with the mounting seat 22 during installation, which is convenient for installation. Then, the filter element 7 can be removed together by taking out the cleaning impeller 8.

[0065] A method for treating wastewater from the manufacture of air conditioning copper pipes, the specific operation of which is as follows:

[0066] I. Wastewater introduction and nitrogen injection

[0067] Open inlet 3 to allow wastewater from the air conditioning copper pipe manufacturing process to enter the circular base 1. Due to the design of inlet 3, the wastewater enters the circular base 1 tangentially and vortexes around the annular base 2. As wastewater is continuously injected, a stable vortex gradually forms within the tank 4. Simultaneously, activate the nitrogen supply system, introducing nitrogen bubbles into the wastewater through nitrogen nozzles 9. The introduction of nitrogen bubbles reduces the oxygen content in the wastewater, preventing metal ion oxidation, and also cleans the guide impeller 5, radial electric field 6, and filter element 7, preventing impurities from adhering.

[0068] II. Adjusting the vortex speed and activating the electric field

[0069] By controlling the motor in the regulating ring seat 51, the external gear ring 512 is driven to rotate. The external gear ring 512 drives the gear 513 meshing with it to rotate, thereby adjusting the angle of the plate blades 53. By adjusting the contact angle between the plate blades 53 and the vortex wastewater, the speed of the wastewater vortex is controlled. At the same time, the power supply of the radial electric field 6 is turned on, energizing the titanium mesh anode 61 and the graphene mesh cathode 62, forming a radial electric field inside the tank 4. Under the action of the radial electric field, heavy metal ions on the inside will migrate to the outside, away from the filter element 7, preventing the filter element 7 from being blocked by heavy metal ions too early.

[0070] III. Turbulence Formation and Filtration

[0071] When the vortex-driven wastewater passes through the cleaning impeller 8, the inclined design of the guide plate 82 and the opposite direction of the vortex direction guide the wastewater to generate turbulence. This turbulence can disrupt the boundary layer on the surface of the filter element 7, enhance the retention efficiency of heavy metal ions, and eliminate ion concentration differences. After the above treatment, the wastewater is finally filtered through the filter element 7 to remove impurities and some heavy metal ions. The filtered water is then discharged from the bottom of the annular base 2.

[0072] The above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the present invention. The scope of protection of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to the present invention within its spirit and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of the present invention.

Claims

1. A wastewater treatment device for air conditioning copper pipe manufacturing, characterized in that: It includes a circular base (1) and an annular base (2) installed inside the circular base (1), and the annular base (2) extends out from the circular base (1). The outer side of the circular base (1) is provided with a water inlet (3), and the wastewater introduced by the water inlet (3) is introduced into the circular base (1) in a tangential direction and flows in a vortex around the annular base (2). The top of the circular base (1) is equipped with a tank (4), which makes the vortex-flowing wastewater generate centrifugal force, leaving metal particles and solid impurities at the edge of the tank (4) for separation. The annular base (2) is equipped with a guide impeller (5) for controlling the rotation speed, and the guide impeller (5) is provided with an annular radial electric field (6). The annular base (2) is provided with multiple filter elements (7). The radial electric field (6) repels the heavy metal ions around the filter element (7) and moves the heavy metal ions away from the filter element (7). The guide impeller (5) can control the angle of the blades to change the vortex speed of the wastewater and flush the electrodes of the radial electric field (6). The centrifugal acceleration generated by the vortex causes the heavy metal ions to migrate, which works in conjunction with the electric field to enhance the interception. The circular base (1) is provided with a cleaning impeller (8) located outside the filter element (7) to enhance the interception efficiency of heavy metal ions and eliminate ion concentration differences; The outer side of the annular base (2) is provided with several sets of nitrogen nozzles (9). Nitrogen bubbles are introduced into the wastewater through the nitrogen nozzles (9) to reduce the oxygen content in the wastewater, and at the same time clean the guide impeller (5), radial electric field (6) and filter element (7). The cleaning impeller (8) includes a sealing plate (81) that is detachably installed at the top port of the tank (4). The bottom of the sealing plate (81) is provided with several groups of guide filter plates (82) arranged in a ring array and tilted with opposite vortex directions. The bottom ends of the several groups of guide filter plates (82) are equipped with fixing rings (83). When the vortex passes through the several groups of guide filter plates (82), it cuts into the guide filter plates (82) to form turbulence that destroys the boundary layer on the surface of the filter element, so that the adsorbed heavy metal ions are flushed back to the mainstream area.

2. The wastewater treatment device for air conditioning copper pipe manufacturing according to claim 1, characterized in that: The guide impeller (5) includes an adjusting ring seat (51) installed on an annular base (2) and a connecting ring seat (52) installed at the bottom of the top of the tank (4). Several sets of plate blades (53) arranged in an annular array are provided between the adjusting ring seat (51) and the connecting ring seat (52). The two ends of the plate blades (53) are rotatably connected to the adjusting ring seat (51) and the connecting ring seat (52) respectively through connecting shafts. The angle of the plate blades (53) is adjusted by adjusting the adjusting ring seat (51) to control the contact angle between the plate blades (53) and the vortex wastewater.

3. The air conditioning copper pipe manufacturing wastewater treatment device according to claim 2, characterized in that: The adjusting ring seat (51) includes a waterproof tank (511) and a rotatable external gear ring (512) disposed inside the waterproof tank (511). The waterproof tank (511) is provided with several sets of gears (513) arranged in a circular array inside, and several sets of gears (513) mesh with the external gear ring (512). The external gear ring (512) is driven by a motor. The shaft ends of the several sets of gears (513) extend from the top of the waterproof tank (511) and are connected to the connecting shaft of the plate blade (53). The rotation angle of the gears (513) is controlled by the rotation of the external gear ring (512), thereby adjusting the angle of the plate blade (53).

4. The air conditioning copper pipe manufacturing wastewater treatment device according to claim 2, characterized in that: The radial electric field (6) includes a titanium mesh anode (61) and a graphene mesh cathode (62) installed between the adjustment ring seat (51) and the connecting ring seat (52). The titanium mesh anode (61) and the graphene mesh cathode (62) are arranged in a ring on the inner side of several sets of plate blades (53). The graphene mesh cathode (62) is located inside the titanium mesh anode (61). The titanium mesh anode (61) and the graphene mesh cathode (62) are energized to form a radial electric field, causing heavy metal ions on the inner side to migrate to the outer side.

5. The air conditioning copper pipe manufacturing wastewater treatment device according to claim 4, characterized in that: The top portions of the titanium mesh anode (61) and the graphene mesh cathode (62) are insulated by an insulating coating, and the wastewater surface is located between the insulating coatings.

6. The wastewater treatment device for air conditioning copper pipe manufacturing according to claim 1, characterized in that: The top of the annular base (2) is provided with a circular boss (21), and the circular boss (21) is provided with a number of filter element mounting seats (22) arranged in a circular array. The top of the filter element (7) is installed on the top of the sealing plate (81). The sealing plate (81) is installed on the top of the tank body (4) by bolts, and the fixing ring (83) abuts against the annular base (2) and wraps the circular boss (21). The number of filter elements (7) are located on each filter element mounting seat (22).

7. The wastewater treatment device for air conditioning copper pipe manufacturing according to claim 1, characterized in that: The flow guide filter plate (82) consists of an external rectangular frame and an internal activated carbon filter plate, and the activated carbon filter plate and the rectangular frame are designed to be detachable.

8. The wastewater treatment device for air conditioning copper pipe manufacturing according to claim 6, characterized in that: The outer side of the circular boss (21) is provided with a protrusion, and the inner side of the fixing ring (83) is provided with a corresponding slot. When the slot on the fixing ring (83) merges with the protrusion on the side of the circular boss (21), several sets of filter elements (7) are respectively placed on each filter element mounting seat (22).

9. A method for treating wastewater from the manufacture of air conditioning copper pipes, characterized in that it employs the wastewater treatment device for the manufacture of air conditioning copper pipes as described in any one of claims 1-8, and the specific operation is as follows: S1. Wastewater enters the circular base (1) through the inlet (3) and flows in a vortex around the annular base (2) until the wastewater in the tank (4) vortexes, while nitrogen nozzle (9) introduces nitrogen bubbles into the wastewater. S2. Adjust the angle of the blades on the guide impeller (5) to control the speed of the wastewater vortex, and turn on the radial electric field (6) so that the radial electric field (6) forms an electric field in the tank (4) so ​​that the heavy metal ions on the inside are transferred to the outside. S3. The vortex wastewater is guided by the blades of the cleaning impeller (8) to generate turbulence, which destroys the boundary layer on the surface of the filter element, enhances the interception efficiency of heavy metal ions, eliminates the ion concentration difference, and finally the wastewater is filtered through the filter element (7) and discharged from the bottom of the annular base (2).

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