Air conditioner copper pipe manufacturing wastewater treatment device and method

Abstract

The invention relates to the technical field of wastewater treatment, and discloses an air conditioner copper pipe manufacturing wastewater treatment device and method.The air conditioner copper pipe manufacturing wastewater treatment device comprises a circular base and an annular base installed in the circular base, the annular base extends out of the circular base, and a water inlet is formed in the outer side of the circular base; wastewater introduced from the water inlet is introduced into the circular base in the tangential direction and flows in a vortex manner around the annular base, and a tank body is mounted at the top end of the circular base, so that the wastewater flowing in the vortex manner generates centrifugal force. Wastewater forms a high-speed vortex through the water inlet in the tangential direction, so that primary separation of metal particles and solid impurities is realized, and the subsequent treatment load is greatly reduced. The flow guide impeller dynamically adjusts the vortex speed, cooperates with a radial electric field to drive heavy metal ions to directionally migrate, links the electric field intensity in real time, enhances ion diffusion and cooperatively improves the heavy metal interception efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of wastewater treatment, and specifically to a wastewater treatment device and method for manufacturing air-conditioning copper tubes. Background Art

[0002] In the air-conditioning copper tube manufacturing industry, in the copper tube rolling process, in order to reduce friction and cool the equipment, emulsions are used. The wastewater formed after mixing with impurities such as copper chips and oil stains contains high-concentration copper ions and organic substances in the emulsion, resulting in a high COD value of the wastewater. In the copper tube cleaning process, the cleaning water used to remove surface oil stains, debris and other pollutants, and the wastewater formed after mixing with the pollutants not only contains copper ions, but also contains acid-base substances and surfactants in the cleaning agent, with unstable acidity and alkalinity and difficult-to-degrade organic substances. In the copper tube surface treatment process, heavy metal ions (such as copper and zinc ions) in the plating solution and passivation agents remain in the wastewater during operations such as electroplating and passivation, with a high heavy metal content.

[0003] The existing wastewater treatment technologies face many problems in dealing with this type of wastewater. Traditional filtration technologies are difficult to handle metal particles and solid impurities in the wastewater. The impurities easily block the filtration device, resulting in frequent maintenance and replacement of the filtration equipment, increasing the operating cost and reducing the treatment efficiency. In terms of heavy metal ion treatment, conventional methods cannot efficiently intercept and separate them, and it is difficult to meet the increasingly stringent environmental protection standards, such as the unsatisfactory removal rates of copper ions, zinc ions, etc. Therefore, the present invention provides a wastewater treatment device and method for manufacturing air-conditioning copper tubes. Summary of the Invention

[0004] In view of the above deficiencies in the prior art, the present invention provides a wastewater treatment device and method for manufacturing air-conditioning copper tubes, which use a radial electric field to migrate heavy metal ions to the high electric field area to prevent the filter element from being blocked by heavy metal ions.

[0005] The present invention provides the following technical solutions: A wastewater treatment device for manufacturing air-conditioning copper tubes includes a circular base and an annular base installed inside the circular base, and the annular base extends out of the circular base. An inlet is provided on the outer side of the circular base, and the wastewater introduced through the inlet is introduced into the circular base tangentially and swirls around the annular base. A tank body is installed at the top of the circular base, so that the swirling wastewater generates centrifugal force, and metal particles and solid impurities are left at the edge of the tank body for separation;

[0006] A flow guiding impeller for controlling the rotation speed is installed on the annular base, and an annular radial electric field is provided on the flow guiding impeller. A plurality of filter cores are provided in the center of the annular base. The heavy metal ions around the filter cores are repelled by the radial electric field, so that the heavy metal ions are away from the filter cores. The flow guiding impeller can control the angle of the blades, change the wastewater vortex speed, wash the electrodes of the radial electric field, and the centrifugal acceleration generated by the vortex makes the heavy metal ions migrate to the high electric field area, strengthening the interception in cooperation with the electric field.

[0007] A cleaning impeller located outside the filter core is provided on the circular base. By means of the cleaning impeller, the electric field blind area formed by the low-pressure area in the center of the vortex is eliminated, the interception efficiency of heavy metal ions is enhanced, and the ion concentration difference is eliminated.

[0008] Several groups of nitrogen nozzles are provided on the outer side surface of the annular base. Nitrogen bubbles are introduced into the wastewater through the nitrogen nozzles to reduce the oxygen content in the wastewater, and at the same time, the flow guiding impeller, the radial electric field and the filter cores are cleaned.

[0009] Preferably, the flow guiding impeller includes an adjusting ring seat installed on the annular base and a connecting ring seat installed at the bottom end of the top of the tank body. Several groups of plate-shaped blades distributed in an annular array are provided between the adjusting ring seat and the connecting ring seat, and both ends of the plate-shaped blades are respectively rotatably connected to the adjusting ring seat and the connecting ring seat through connecting shafts. The angle of the plate-shaped blades is adjusted by the adjusting ring seat to control the contact angle between the plate-shaped blades and the vortex wastewater.

[0010] Preferably, the adjusting ring seat includes a waterproof tank body and a rotatable outer toothed ring arranged inside the waterproof tank body. Several groups of gears distributed in an annular array are provided inside the waterproof tank body, and all the several groups of gears are meshed with the outer toothed ring. The outer toothed ring is driven by a motor. The shaft ends of the several groups of gears extend out from the top of the waterproof tank body and are connected to the connecting shafts of the plate-shaped blades. The rotation angle of the gears is controlled by the rotation of the outer toothed ring to adjust the angle of the plate-shaped blades.

[0011] Preferably, the radial electric field includes a titanium mesh anode and a graphene mesh cathode installed between the adjusting ring seat and the connecting ring seat, and the titanium mesh anode and the graphene mesh cathode are annularly located inside the several groups of plate-shaped blades. The graphene mesh cathode is located inside the titanium mesh anode. The titanium mesh anode and the graphene mesh cathode are energized to form a radial electric field, so that the heavy metal ions inside migrate to the outside.

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

[0013] Preferably, the cleaning impeller includes a sealing plate detachably installed at the top port of the tank body. At the bottom of the sealing plate, there are several groups of inclined diversion filter plates distributed in a circular array with opposite eddy current directions. At the bottom ends of the several groups of diversion filter plates, a fixing ring is installed. When the eddy current passes through the several groups of diversion filter plates, turbulent flow is formed by cutting into the diversion filter plates, destroying the boundary layer on the surface of the filter element, and washing the adsorbed heavy metal ions back into the main flow area.

[0014] Preferably, a circular boss is provided at the top end of the annular base, and several groups of filter element mounting seats are provided on the circular boss. The top end of the filter element is installed on the top of the sealing plate. The sealing plate is installed on the top of the tank body by bolts, and the fixing ring abuts against the annular base and wraps the circular boss, and several groups of filter elements are respectively located on each filter element mounting seat.

[0015] Preferably, the diversion filter plate is composed 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, a protrusion is provided on the outer side of the circular boss, and a corresponding position of a card slot is provided on the inner side of the fixing ring. When the card slot on the fixing ring merges with the protrusion on the side of the circular boss, several groups of filter elements are respectively located on each filter element mounting seat.

[0017] A method for treating wastewater from air-conditioning copper pipe manufacturing is as follows:

[0018] S1. The wastewater enters the inside of the circular base through the water inlet and swirls around the annular base until the wastewater in the tank body swirls. At the same time, nitrogen gas nozzles introduce nitrogen gas bubbles into the wastewater.

[0019] S2. Adjust the angle of the blades on the diversion impeller to control the swirling speed of the wastewater, and turn on the radial electric field to form an electric field in the tank body, so that the heavy metal ions on the inner side transfer to the outer side.

[0020] S3. The swirling wastewater passes through the cleaning impeller and is guided by its blades to generate turbulent flow, destroying the boundary layer on the surface of the filter element, eliminating the electric field blind area formed by the low-pressure area in the center of the vortex, strengthening the interception efficiency of heavy metal ions, eliminating 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) The wastewater forms a high-speed vortex through the tangential water inlet, realizing the preliminary separation of metal particles and solid impurities, and greatly reducing the subsequent treatment load. The diversion impeller dynamically adjusts the swirling speed, cooperates with the radial electric field to drive the directional migration of heavy metal ions, and synchronizes the electric field intensity in real time, strengthening ion diffusion and synergistically improving the heavy metal interception efficiency.

[0023] (2) The radial electric field causes the inner heavy metal ions to migrate outward, avoiding premature clogging of the filter element, extending its service life, and improving the interception efficiency of heavy metal ions. The guide impeller and the radial electric field cooperate with each other. When the vortex speed is accelerated, the heavy metal ions can diffuse more fully, increasing the chance of contact with the electric field. The electric field force can more effectively drive the ions to migrate, and the vortex centrifugal acceleration also helps the ions to migrate to the high electric field area, synergistically enhancing the interception effect.

[0024] (3) The diversion filter plate of the cleaning impeller is inclined and the vortex direction is opposite, causing the wastewater to form turbulence, destroying the boundary layer on the surface of the filter element, washing away the adsorbed heavy metal ions, eliminating the electric field blind area in the low-pressure area at the center of the vortex, strengthening the interception efficiency of heavy metal ions, and eliminating the ion concentration difference. The diversion filter 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 simultaneously remove heavy metals and organic matter, and has a high turbulent shear force, enabling the filtration flux recovery rate to be higher than that of traditional backwashing.

[0025] (4) The nitrogen nozzle introduces nitrogen bubbles into the wastewater, reducing the oxygen content in the wastewater, avoiding oxidation of the electrodes of the radial electric field, and simultaneously cleaning the guide impeller, the radial electric field, and the filter element, forming a nitrogen barrier to prevent membrane fouling caused by the oxidation of Fe 2+ to Fe 3+ . BRIEF DESCRIPTION OF THE DRAWINGS

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

[0027] Figure 2 is the Figure 1 internal top view structural diagram of the present invention;

[0028] Figure 3 is the Figure 1 internal structural diagram of the present invention;

[0029] Figure 4 is the Figure 3 internal structural diagram of the present invention;

[0030] Figure 5 is the structural diagram of the guide impeller of the present invention;

[0031] Figure 6 is the Figure 5 split structural diagram of the present invention;

[0032] Figure 7 is the structural diagram of the adjusting ring seat of the present invention;

[0033] Figure 8 is the structural diagram of the radial electric field of the present invention;

[0034] Figure 9 Schematic structural diagram of the impeller cleaning structure of the present invention;

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

[0036] Figure 11 Schematic structural diagram of the annular base of the present invention.

[0037] In the figure: 1, circular base; 2, annular base; 3, water inlet; 4, tank body; 5, guide impeller; 6, radial electric field; 7, filter element; 8, cleaning impeller; 9, nitrogen spray head; 51, adjusting ring seat; 52, connecting ring seat; 53, plate blade; 511, waterproof tank body; 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 seat. Specific embodiments

[0038] In order to make the objectives, technical solutions, and advantages of the embodiments of the present disclosure clearer, the following will clearly and completely describe the technical solutions of the embodiments of the present disclosure in conjunction with the drawings of the embodiments of the present disclosure. To keep the following description of the embodiments of the present disclosure clear and concise, the detailed descriptions of known functions and known components are omitted to avoid unnecessarily confusing the concepts of the present invention.

[0039] Please refer to Figure 1 and Figure 2 , the wastewater treatment device for manufacturing air-conditioning copper tubes of the present invention mainly consists of a circular base 1, an annular base 2, a tank body 4, a guide impeller 5, a radial electric field 6, a filter element 7, a cleaning impeller 8, a nitrogen spray head 9, and other parts.

[0040] Refer to Figure 3 , the circular base 1 is the basic support structure of the entire device, and a water 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 water inlet 3 enters the inside of the circular base 1 in a tangential direction and swirls around the annular base 2. The centrifugal force generated by this swirling flow can keep metal particles and solid impurities at the edge of the tank body 4, achieving preliminary separation.

[0041] The tank body 4 is installed on the top of the circular base 1, providing a closed space for wastewater treatment, enabling the swirling wastewater to undergo subsequent treatment steps therein.

[0042] Refer to Figure 4 and Figure 5 as well as Figure 6, the diversion impeller 5 is installed on the annular base 2 and includes an adjustment ring seat 51 and a connecting ring seat 52. The adjustment ring seat 51 is installed on the annular base 2, and the connecting ring seat 52 is installed at the bottom end of the top of the tank body 4. A plurality of groups of plate-shaped blades 53 distributed in an annular array are arranged between the adjustment ring seat 51 and the connecting ring seat 52, and both ends of the plate-shaped blades 53 are rotatably connected to the adjustment ring seat 51 and the connecting ring seat 52 through connecting shafts respectively.

[0043] Refer to Figure 7 , the adjustment ring seat 51 includes a waterproof tank body 511 and a rotatable external toothed ring 512. A plurality of groups of gears 513 distributed in an annular array are arranged inside the waterproof tank body 511, and these gears 513 are all meshed with the external toothed ring 512, and the external toothed ring 512 is driven by a motor. The shaft ends of the plurality of groups of gears 513 extend out from the top of the waterproof tank body 511 and are connected to the connecting shafts of the plate-shaped blades 53. When the external toothed ring 512 rotates, it will drive the gears 513 to rotate, thereby adjusting the angle of the plate-shaped blades 53, controlling the contact angle between the plate-shaped blades 53 and the vortex wastewater, and further changing the vortex speed of the wastewater.

[0044] The core function of the diversion impeller 5 is to control the vortex speed of the wastewater. By adjusting the angle of the plate-shaped blades 53, the flow state of the wastewater can be flexibly changed. When it is necessary to enhance the treatment effect on heavy metal ions, the vortex speed can be increased to make the movement of the wastewater in the tank body more intense and increase the action opportunity between the heavy metal ions and the electric field; when equipment maintenance is required or energy consumption is to be reduced, the vortex speed can be appropriately reduced.

[0045] According to the real-time feedback of the heavy metal concentration in the wastewater (such as Cu 2 +, Zn 2 +), dynamically adjust the blade angle:

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

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

[0048] Refer to Figure 8 , 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, and the titanium mesh anode 61 and the graphene mesh cathode 62 are annularly located inside a plurality of groups of plate-shaped blades 53, and the graphene mesh cathode 62 is located inside the titanium mesh anode 61.

[0049] After the titanium mesh anode 61 and the graphene mesh cathode 62 are energized, a radial electric field is formed, causing the heavy metal ions inside to migrate outward, away from the filter core 7. At the same time, the top parts of the titanium mesh anode 61 and the graphene mesh cathode 62 are insulated by an insulating coating, and the waste water level 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 use the electric field force to drive the directional migration of heavy metal ions. Under the action of the electric field, the positively charged heavy metal ions will move towards the titanium mesh anode 61, thus moving away from the filter core 7, preventing the filter core 7 from being blocked by heavy metal ions prematurely, extending the service life of the filter core 7, and at the same time improving the interception efficiency of heavy metal ions.

[0051] The guide vane impeller 5 and the radial electric field 6 cooperate with each other to jointly improve the treatment effect of heavy metal ions. When the guide vane impeller 5 adjusts the vortex speed of the waste water to increase, the flow of the waste water becomes more intense, the diffusion of heavy metal ions in the water is more sufficient, the contact opportunity with the radial electric field increases, and 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 will also cause the heavy metal ions to migrate towards the high electric field area, synergistically strengthening the interception effect with the electric field. On the contrary, when it is necessary to reduce the treatment intensity or make equipment adjustments, the guide vane impeller 5 can slow down the vortex speed. At this time, the radial electric field can still effectively migrate and intercept heavy metal ions.

[0052] Titanium mesh anode 61: The pore size is 0.5 mm, and the surface is coated with ruthenium iridium oxide (RuO2 - IrO2), which raises 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, and the specific surface area ≥ 1200 m 2 / g, enhancing the adsorption ability of heavy metal ions.

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

[0055] Insulating coating: An alumina ceramic coating is sprayed in the area above the liquid level, with a withstand voltage ≥ 10 kV to prevent electric field short - circuit

[0056] Refer to Figure 9 and Figure 10 , the cleaning impeller 8 includes a sealing plate 81 detachably installed at the top port of the tank body 4. The bottom of the sealing plate 81 is provided with several groups of inclined guide filter plates 82 distributed in an annular array with opposite vortex directions, and a fixing ring 83 is installed at the bottom ends of the several groups of guide filter plates 82.

[0057] When the vortex wastewater passes through the cleaning impeller 8, due to the inclined shape of the diversion filter plate 82 and the opposite vortex direction, the wastewater will form a turbulent flow after cutting into the diversion filter plate 82. This turbulent flow can destroy the boundary layer on the surface of the filter element, causing the heavy metal ions originally adsorbed on the surface of the filter element 7 to be washed back into the mainstream area. At the same time, the cleaning impeller 8 can also eliminate the electric field blind area formed in the low-pressure area at the center of the vortex, enhance the interception efficiency of heavy metal ions, and eliminate the ion concentration difference.

[0058] During the wastewater treatment process, when the wastewater forms a stable vortex under the action of the diversion impeller 5 and enters the area where the cleaning impeller 8 is located, the cleaning impeller 8 starts to play its role. The wastewater contacts the diversion filter plate 82. Due to the special design of the diversion filter plate 82, the flow direction and speed of the wastewater change, thus forming a turbulent flow. The formation of the turbulent flow destroys the boundary layer on the surface of the filter element 7, causing the heavy metal ions adsorbed on the surface of the filter element 7 to lose the condition of attachment and be re-introduced into the mainstream of the wastewater. At the same time, this turbulent flow can also improve the electric field distribution in the low-pressure area at the center of the vortex, eliminate the electric field blind area, make the electric field in the entire tank act more uniformly and effectively on the heavy metal ions, and further improve the interception efficiency of the heavy metal ions. The diversion 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 inclination angle of the diversion filter plate 82 in the radial electric field 6 forms an angle of 30° with the horizontal plane, and the vortex directions of adjacent filter plates are opposite (alternating clockwise and counterclockwise), forming a strong turbulent flow with a local Reynolds number Re > 5000;

[0060] Activated carbon filter plate: The pore diameter is 5μm, loaded with nano zero-valent iron (nZVI), which converts Cr(VI) to Cr(III) through chemical reduction, synchronously removing heavy metals and organic substances.

[0061] The turbulent shear force reaches 2.5 N / m 2 , stripping the sediment on the surface of the filter element, so that the filtration flux recovery rate > 95% (compared with 80% of traditional backwashing).

[0062] Several groups 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, prevent the electrodes of the radial electric field 6 from being oxidized, and at the same time clean the diversion impeller 5, the radial electric field 6 and the filter element 7, forming a nitrogen barrier to prevent the membrane fouling caused by the oxidation of Fe 2 + to Fe 3 +

[0063] See Figure 11, a plurality of filter elements 7 are provided in the center of the annular base 2 for further filtering the wastewater after preliminary treatment and the action of the electric field. A circular boss 21 is provided at the top of the annular base 2, and a plurality of groups of filter element mounting seats 22 distributed in an annular array are provided on the circular boss 21. The top of the filter element 7 is mounted on the top of the sealing plate 81, and the sealing plate 81 is mounted on the top of the tank body 4 by bolts. The fixing ring 83 abuts against the annular base 2 and wraps the circular boss 21, so that a plurality of groups of filter elements 7 are respectively located on each filter element mounting seat 22.

[0064] A protrusion is provided on the outer side of the circular boss 21, and a corresponding position of the card slot is provided on the inner side of the fixing ring 83. When the card slot on the fixing ring 83 merges with the protrusion on the side of the circular boss 21, a plurality of groups of filter elements 7 are respectively located 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. In this way, when the cleaning impeller 8 is taken out, the filter element 7 can be taken out together.

[0065] A method for treating wastewater from the manufacture of air-conditioning copper tubes is as follows:

[0066] I. Wastewater introduction and nitrogen injection

[0067] Open the water inlet 3 so that the wastewater from the manufacture of air-conditioning copper tubes enters the inside of the circular base 1 through the water inlet 3. Due to the design of the water inlet 3, after the wastewater enters the circular base 1 in a tangential direction, it will swirl around the annular base 2. As the wastewater is continuously injected, the wastewater in the tank body 4 gradually forms a stable vortex. At the same time, start the nitrogen supply system so that the nitrogen nozzle 9 introduces nitrogen bubbles into the wastewater. The introduction of nitrogen bubbles can reduce the oxygen content in the wastewater, prevent the oxidation of metal ions, and at the same time clean the guide impeller 5, the radial electric field 6, and the filter element 7 to avoid the attachment of impurities.

[0068] II. Adjust the vortex speed and turn on the electric field

[0069] By controlling the motor in the adjusting ring seat 51, drive the outer tooth ring 512 to rotate, and the outer tooth ring 512 drives the gear 513 meshing with it to rotate, thereby adjusting the angle of the plate-shaped blade 53. By adjusting the contact angle between the plate-shaped blade 53 and the swirling wastewater, control the speed of the wastewater vortex. At the same time, turn on the power supply of the radial electric field 6 so that the titanium mesh anode 61 and the graphene mesh cathode 62 are energized to form a radial electric field in the tank body 4. Under the action of the radial electric field, the heavy metal ions on the inner side will migrate to the outer side, away from the filter element 7, to avoid premature clogging of the filter element 7 by heavy metal ions.

[0070] III. Turbulence formation and filtration

[0071] When the vortex wastewater passes through the cleaning impeller 8, due to the inclined design of the diversion filter plate 82 and the setting opposite to the vortex direction, the wastewater will be guided by the diversion filter plate 82 to generate turbulence. This turbulence can destroy the boundary layer on the surface of the filter element 7, eliminate the electric field blind area formed by the low-pressure area at the center of the vortex, enhance the interception efficiency of heavy metal ions, and eliminate the ion concentration difference. The wastewater after the above treatment is finally filtered through the filter element 7 to remove impurities and some heavy metal ions in it, and the filtered water is discharged from the bottom of the annular base 2.

[0072] The above embodiments are only exemplary embodiments of the present invention and are not used to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent replacements should also be regarded as falling within the protection scope of the present invention.

Claims

1. A wastewater treatment device for manufacturing air-conditioning copper tubes, 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 of the circular base (1). A water inlet (3) is provided on the outer side of the circular base (1), and the wastewater introduced through the water inlet (3) is introduced into the inside of the circular base (1) in a tangential direction and swirls around the annular base (2). A tank body (4) is installed at the top of the circular base (1), so that the swirling wastewater generates centrifugal force, and metal particles and solid impurities are left at the edge of the tank body (4) for separation; A flow guiding impeller (5) for controlling the rotation speed is installed on the annular base (2), and an annular radial electric field (6) is provided on the flow guiding impeller (5). A plurality of filter cores (7) are provided in the center of the annular base (2). The heavy metal ions around the filter cores (7) are repelled by the radial electric field (6), so that the heavy metal ions are far away from the filter cores (7). The flow guiding impeller (5) can control the angle of the blades, change the swirling speed of the wastewater, wash the electrodes of the radial electric field (6), and the centrifugal acceleration generated by the swirl makes the heavy metal ions migrate to the high electric field area, synergistically strengthening the interception with the electric field; A cleaning impeller (8) is provided on the circular base (1) outside the filter core (7). By means of the cleaning impeller (8), the electric field blind area formed by the low-pressure area in the center of the swirl is eliminated, the interception efficiency of heavy metal ions is enhanced, and the ion concentration difference is eliminated; Several groups of nitrogen nozzles (9) are provided on the outer side surface 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. At the same time, the flow guiding impeller (5), the radial electric field (6) and the filter cores (7) are cleaned.

2. The wastewater treatment device for manufacturing air-conditioning copper tubes according to claim 1, wherein: The flow guiding impeller (5) includes an adjusting ring seat (51) installed on the annular base (2) and a connecting ring seat (52) installed at the bottom end of the top of the tank body (4). Several groups of plate-shaped blades (53) distributed in an annular array are provided between the adjusting ring seat (51) and the connecting ring seat (52). The two ends of the plate-shaped blades (53) are respectively rotatably connected to the adjusting ring seat (51) and the connecting ring seat (52) through connecting shafts. The angle of the plate-shaped blades (53) is adjusted through the adjusting ring seat (51) to control the contact angle between the plate-shaped blades (53) and the swirling wastewater.

3. The wastewater treatment device for manufacturing air-conditioning copper tubes according to claim 2, characterized in that: The adjusting ring seat (51) includes a waterproof tank body (511) and a rotatable external toothed ring (512) arranged inside the waterproof tank body (511). Several groups of gears (513) distributed in an annular array are provided inside the waterproof tank body (511). All the several groups of gears (513) are meshed with the external toothed ring (512). The external toothed ring (512) is driven by a motor. The shaft ends of the several groups of gears (513) extend out from the top of the waterproof tank body (511) and are connected to the connecting shafts of the plate-shaped blades (53). The rotation angle of the gears (513) is controlled by the rotation of the external toothed ring (512) to adjust the angle of the plate-shaped blades (53).

4. The wastewater treatment device for manufacturing air-conditioning copper tubes according to claim 2, wherein: 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 annularly located inside several groups of plate-shaped blades (53). The graphene mesh cathode (62) is located inside the titanium mesh anode (61). When the titanium mesh anode (61) and the graphene mesh cathode (62) are energized, a radial electric field is formed, causing the heavy metal ions inside to migrate outward.

5. The wastewater treatment device for manufacturing air-conditioning copper pipes according to claim 4, wherein: The top parts of the titanium mesh anode (61) and the graphene mesh cathode (62) are insulated by an insulating coating, and the wastewater liquid level is located between the insulating coatings.

6. The wastewater treatment device for manufacturing air-conditioning copper tubes according to claim 1, wherein: The cleaning impeller (8) includes a sealing plate (81) detachably installed at the top port of the tank body (4). At the bottom of the sealing plate (81), several groups of flow guiding filter plates (82) are arranged in an annular array and are inclined with opposite eddy current directions. A fixing ring (83) is installed at the bottom ends of several groups of the flow guiding filter plates (82). When the eddy current passes through several groups of the flow guiding filter plates (82), it cuts into the flow guiding filter plates (82) to form a turbulent flow, destroying the boundary layer on the surface of the filter element, and washing the adsorbed heavy metal ions back to the main flow area.

7. The wastewater treatment device for manufacturing air-conditioning copper pipes according to claim 6, characterized in that: A circular boss (21) is provided at the top end of the annular base (2), and several groups of filter element mounting seats (22) are arranged in an annular array on the circular boss (21). The top end 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), and several groups of filter elements (7) are respectively located on each filter element mounting seat (22).

8. The wastewater treatment device for manufacturing air-conditioning copper tubes according to claim 6, characterized in that: The flow guiding filter plate (82) is composed 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.

9. The wastewater treatment device for manufacturing air-conditioning copper tubes according to claim 7, wherein: A protrusion is provided on the outer side of the circular boss (21), and a corresponding position groove is provided on the inner side of the fixing ring (83). When the groove on the fixing ring (83) merges with the protrusion on the side of the circular boss (21), several groups of filter elements (7) are respectively located on each filter element mounting seat (22).

10. A method for treating wastewater from the manufacture of air-conditioning copper tubes, characterized in that it uses a wastewater treatment device for the manufacture of air-conditioning copper tubes according to any one of claims 1-9, and the specific operations are as follows: S1. The wastewater enters the inside of the circular base (1) through the water inlet (3) and swirls around the annular base (2) until the wastewater in the tank body (4) swirls. At the same time, the nitrogen gas nozzle (9) introduces nitrogen gas bubbles into the wastewater. S2. Adjust the angle of the blades on the flow guiding impeller (5) to control the swirling speed of the wastewater, and turn on the radial electric field (6) to form an electric field in the tank body (4) with the radial electric field (6), causing the heavy metal ions inside to transfer outward. S3. The wastewater with vortices passes through the cleaning impeller (8), and is guided by its blades to generate turbulence, which destroys the boundary layer on the surface of the filter element, eliminates the electric field blind area formed by the low-pressure area in the center of the vortex, 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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