Electroplating wastewater magnetic adsorption treatment device for fully separating flocculation

Abstract

A kind of electroplating wastewater magnetic adsorption treatment device of fully separated flocculation, including wastewater treatment tank, aeration system, magnetic adsorption system, sewage system and flow guide system;The wastewater treatment tank includes effluent tank, adsorption tank, water inlet, water outlet, sewage outlet, partition, communication port;Sewage outlet is set on the top side wall of effluent tank;Sewage system is set above wastewater treatment tank and straddles adsorption tank, effluent tank and sewage outlet;The aeration system is set in the bottom of adsorption tank;Magnetic adsorption system is set in adsorption tank;By setting magnetic adsorption system above aeration system, electroplating wastewater is mixed with magnetic powder and flocculant, the magnetism of flocculation makes it adsorbed on the surface of magnetic adsorption transmission belt during the process of being pushed up by bubble and is taken to the upper part of liquid surface by magnetic adsorption transmission belt, finally is discharged by sewage system.The setting of magnetic adsorption system improves the separation degree of flocculation, reduces the influence caused by micro-bubble early rupture.

Description

Technical Field

[0001] The present invention relates to an electroplating wastewater treatment device, in particular to an electroplating wastewater flocculant adsorption device. Background Art

[0002] Since the wastewater and waste liquid discharged from electroplating factories contain a large amount of metal ions such as chromium, iron, nickel, cyanide, acid, and alkali, they generally contain organic additives. Therefore, the electroplating wastewater discharged from electroplating plants needs to undergo specific environmental protection treatment. Existing equipment will produce floccules when initially treating wastewater. Most of the existing technologies use flotation equipment to generate microbubbles attached to the floccules, and the buoyancy of the bubbles pushes the floccules upward to the water surface, and then the floccules are discharged through circulating slag discharge equipment. This method is highly efficient and suitable for large-scale treatment of electroplating wastewater. However, in this solution, some bubbles are easily broken by hydraulic pressure during the floating period, and the broken bubbles cannot provide effective buoyancy for the floccules. The buoyancy of the floccules in the electroplating wastewater is limited, and it is impossible to provide good buoyancy for larger floccules, resulting in poor separation of heavy metals in electroplating wastewater.

[0003] To overcome this shortcoming, existing technologies have also adopted magnetic field adsorption methods. This involves mixing magnetic powder with electroplating wastewater. Through the combination of the magnetic powder and flocculants, the flocculants are adsorbed to the magnetic unit under the action of an external magnetic field. However, in large-scale electroplating wastewater treatment, the direction of water flow sometimes opposes the direction of movement of the brush magnetic unit. This generates shear force when the magnetic unit and flocculants move in opposite directions, making it difficult for the flocculants to be adsorbed to the magnetic unit.

[0004] In order to solve the above technical problems, it is necessary to design a magnetic adsorption treatment device for electroplating wastewater that can fully separate flocs, which can fully combine the advantages of flotation separation and magnetic separation, and at the same time solve the technical problem of premature bubble rupture and poor separation effect in flotation separation, as well as the technical problem of strong water shear force in magnetic separation. Summary of the Invention

[0005] The object of the present invention is to provide a magnetic adsorption treatment device for electroplating wastewater which can fully separate flocculants, so as to solve the technical problems in the prior art.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0007] A magnetic adsorption treatment device for electroplating wastewater that fully separates flocs, comprising a wastewater treatment tank, an aeration system, a magnetic adsorption system, a sewage discharge system, and a diversion system;

[0008] The wastewater treatment tank comprises a water outlet tank, an adsorption tank, a water inlet, a water outlet, a sewage outlet, a partition, and a communication port. The water outlet tank and the adsorption tank are arranged adjacently, and the water outlet tank and the adsorption tank are separated by the partition. The bottom of the adsorption tank is provided with the water inlet, through which the electroplating wastewater mixed with magnetic powder and flocculants enters from the bottom of the adsorption tank. The water outlet is arranged on the sidewall of the bottom of the water outlet tank, and the wastewater after separation of flocculants flows out from the water outlet. The top of the partition is provided with the communication port, which communicates the top of the water outlet tank and the top of the adsorption tank. The sewage outlet is arranged on the top sidewall of the water outlet tank. The sewage system is arranged above the wastewater treatment tank and across the adsorption tank, the water outlet tank, and the sewage outlet.

[0009] The aeration system is arranged at the bottom of the adsorption tank.

[0010] The magnetic adsorption system is arranged in the adsorption tank. The magnetic adsorption system comprises a plurality of circulating magnetic adsorption conveyor belt mechanisms arranged longitudinally in the adsorption tank. Each circulating magnetic adsorption conveyor belt mechanism is arranged at a distance.

[0011] Preferably, the circulating magnetic adsorption conveyor belt mechanism comprises a magnetic adsorption transmission belt, upper and lower roller shafts, a lower roller, and an upper roller. The upper and lower roller shafts are horizontally arranged one above the other inside the adsorption tank. The lower roller is fixedly sleeved on the lower roller shaft, and the upper roller is fixedly sleeved on the upper roller shaft. The lower roller and the upper roller are both arranged inside the adsorption tank, with the lower roller located directly below the upper roller. The lower roller is immersed in the electroplating wastewater, and the upper roller is arranged above the liquid level of the electroplating wastewater. The lower roller and the upper roller are externally sleeved with the magnetic adsorption transmission belt.

[0012] Preferably, the magnetic adsorption transmission belt comprises magnetic adsorption belt segments, belt pins, and magnetic blocks. A plurality of magnetic adsorption belt segments are connected end to end by the belt pins to form a closed-loop magnetic adsorption transmission belt. The magnetic adsorption belt segments are made of rubber, and the belt pins are made of hard plastic. The belt pin passes through the top connecting ears of the lower magnetic adsorption belt segment, then passes through the bottom connecting ears of the upper magnetic adsorption belt segment, and then passes through the top connecting ears of the lower magnetic adsorption belt segment again to connect the upper and lower magnetic adsorption belt segments. The magnetic blocks are arranged in a matrix inside the belt body.

[0013] Preferably, the sewage system is a sewage structure driven by a circulating conveyor belt, which comprises a front roller, a rear roller, a sewage conveying belt, and a sewage plate. The front roller and the rear roller are horizontally arranged above the wastewater treatment tank, and the central axes of the front roller and the rear roller are perpendicular to the central axes of the lower roller and the upper roller. The front roller is arranged on the end of the adsorption tank in the wastewater treatment tank, and the rear roller is arranged on the upper part of the sewage outlet. The front roller and the rear roller are sleeved with the sewage conveying belt.

[0014] Preferably, the sewage plates are arranged in an equal-interval column along the central axis direction of the front and rear rollers on the sewage conveying belt. The end of the sewage plate on the side facing the wastewater treatment tank extends into the spacing space of the adjacent circulating magnetic adsorption transmission belt mechanism and downward into the wastewater surface. The spacing between adjacent sewage plates is equal to the width of the circulating magnetic adsorption transmission belt mechanism. On the sewage conveying belt, a plurality of columns of sewage plates are arranged at equal intervals.

[0015] Preferably, the pollution discharge plate comprises a connecting rod and a plate body; one end of the connecting rod is connected to the surface of the pollution discharge conveying belt, and the other end is connected to the plate body; the width of the plate body is greater than the width of the connecting rod, and the width of the plate body is equal to the distance between adjacent two magnetic adsorption transmission belts of the magnetic adsorption conveying belt mechanism; the connecting rod is close to the surface of the downward transmission belt and away from the surface of the upward transmission belt in the width direction of the adsorption space.

[0016] Preferably, the flow guide system comprises a flow guide plate, an opening rack and a closing rack, and the flow guide plate, the opening rack and the closing rack are all made of plastic; the flow guide plate is installed on each magnetic adsorption belt section of the magnetic adsorption transmission belt; the flow guide plate comprises two rotating sleeves and a flow guide plate body, the two rotating sleeves are sleeved on the end portions of the magnetic adsorption belt section extending out of the both sides of the pin, the flow guide plate body is fixed between the two rotating sleeves, the flow guide plate body is arranged along the tangent direction of the outer edge of the rotating sleeve, and the flow guide plate body covers the outer surface of the magnetic adsorption belt section.

[0017] Preferably, the end portion of the rotating sleeve is provided with a gear disc, the outer edge of the gear disc is provided with a gear ring, and the end face of the gear disc is a limiting face; the pin body in contact with the magnetic adsorption belt section is provided with a connecting key; the end portion of the pin has a flange after extending out of the rotating sleeve, one side of the flange is in contact with the limiting face of the gear disc; two center-symmetrical counterbores are arranged on the limiting face, a spring limiting ball structure is installed in the counterbores, two groups of limiting groove structures are arranged on the flange, and the two groups of limiting groove structures are respectively in a closed state limiting and an opening state limiting; each group of limiting groove structures comprises two center-symmetrical grooves, and the radial positions of the grooves correspond to the counterbores; the phase difference angle between the closed state limiting and the opening state limiting is alpha.

[0018] Preferably, the opening rack and the closing rack are arranged on the downward transmission belt section; the opening rack is arranged in the internal space of the magnetic adsorption transmission belt, and in the height direction, the top end of the opening rack is located at a position greater than the length of one magnetic adsorption belt section from the lowest end of the pollution discharge plate; when the rotating sleeve passes through the position of the opening rack, the gear disc is engaged with the opening rack, and when the gear disc is disengaged from the opening rack, the rotating sleeve is just rotated from the closed state limiting to the opening state limiting.

[0019] Preferably, the closing rack is arranged in the external space of the downward transmission belt and the external space of the magnetic adsorption transmission belt, and in the height direction, the bottom end of the closing rack is located at the tangent point position of the lower roller and the downward transmission belt; when the rotating sleeve passes through the position of the closing rack, the gear disc is engaged with the closing rack, so as to drive the rotating sleeve to rotate reversely against the limiting action of the spring limiting ball; when the gear disc is disengaged from the closing rack, the rotating sleeve is just rotated from the opening state limiting to the closed state limiting.

[0020] The beneficial effects of the present application are as follows:

[0021] 1. This invention incorporates a magnetic adsorption system above the aeration system. Magnetic powder and flocculants are mixed into the electroplating wastewater. The magnetic properties of the flocs cause them to adhere to the surface of a magnetic adsorption belt as bubbles push them upward. The belt then carries them to the top of the liquid and ultimately to the sewage system. This magnetic adsorption system improves floc separation and reduces the impact of premature microbubble rupture.

[0022] 2. By setting a rotatable rotating sleeve and guide plate body on the magnetic adsorption belt section, the circulating magnetic adsorption system generates shear force on the flocculants in the opposite direction of movement, and the electroplating wastewater carrying the flocculants is diverted from the downward transmission belt with shear force to the surface of the upward transmission belt, ensuring that the flocculants that are not fully floated are fully adsorbed to the surface of the magnetic adsorption belt section.

[0023] 3. The structure of the drainage system's plates and the positioning of the opening and closing racks ensure that the interlocking magnetic adsorption system, drainage system, and diversion system do not interfere with each other, ensuring that flocculants are fully transported to the drainage outlet. The compact size of the toothed disc on the rotating sleeve and the limiting structure between it and the belt pin enable controlled opening and closing of the diversion plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a front view of the processing device of the present invention;

[0025] Figure 2 is a side view of the processing device of the present invention;

[0026] Figure 3 This is a front view of the magnetic adsorption transmission belt structure of the present invention;

[0027] Figure 4 This is a side view of the magnetic adsorption transmission belt structure of the present invention;

[0028] Figure 5 This is a front view of the diversion system structure of the present invention;

[0029] Figure 6 It is a side view of the diversion system structure of the present invention;

[0030] Figure 7 This is a schematic diagram of the structure of the guide plate of the present invention being opened;

[0031] Figure 8 This is a schematic diagram of the closed structure of the guide plate of the present invention;

[0032] Figure 9 Schematic diagram of the structure of the guide plate of the present invention;

[0033] Figure 10 This is a schematic diagram of the guide plate limiting structure of the present invention;

[0034] Figure: wastewater treatment tank 1, aeration system 2, magnetic adsorption system 3, sewage system 4, effluent tank 11, adsorption tank 12, water inlet 13, water outlet 14, sewage outlet 15, partition 16, communication port 17, aeration valve 21, aeration nozzle 22, magnetic adsorption transmission belt 31, upper and lower two roller shafts 32, driving pulley 33, drive motor 34, driven pulley 35, transmission belt 36, lower roller 37, upper roller 38, front roller 41, rear roller 42, sewage conveying belt 43, sewage plate 44, magnetic adsorption belt section 311, belt pin 312, magnetic block 313, top connecting lug 311a, belt body 311b, bottom connecting lug 311c, second spacing S2, ascending transmission belt U, descending transmission belt D, connecting rod 441, plate body 442, flow guide plate 5, opening rack 6, closing rack 7, rotating sleeve 51 and flow guide plate body 52, toothed disc 51a, connecting key 312a, limit surface 51b, counterbore 51c, flange 312b, closing state limit 312c, opening state limit 312d, flow direction f. DETAILED DESCRIPTION

[0035] The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings and preferred embodiments.

[0036] As Figures 1-10 shown is a structure schematic diagram of a magnetic adsorption treatment device for electroplating wastewater with sufficient separation of flocculants. It includes wastewater treatment tank 1, aeration system 2, magnetic adsorption system 3, and sewage system 4.

[0037] As Figure 2 shown, wastewater treatment tank 1 is a rectangular cross-section tank structure, which includes effluent tank 11, adsorption tank 12, water inlet 13, water outlet 14, sewage outlet 15, partition 16, and communication port 17. Among them, effluent tank 11 and adsorption tank 12 are arranged adjacent to each other, and are separated by partition 16. Water inlet 13 is arranged at the bottom of adsorption tank 12, and electroplating wastewater mixed with magnetic powder and flocculants enters from the bottom of adsorption tank 12 through water inlet 13. Water outlet 14 is arranged on the side wall at the bottom of effluent tank 11, and wastewater after separation of flocculants flows out from water outlet 14. Communication port 17 is arranged at the top of partition 16, connecting the top of effluent tank 11 and adsorption tank 12. Sewage outlet 15 is arranged on the top side wall of effluent tank 11, and sewage system 4 spans adsorption tank 12, effluent tank 11, and sewage outlet 15, to uniformly discharge floating flocculants from the top of wastewater treatment tank 1 through sewage outlet 15.

[0038] The aeration system 2 is located at the bottom of the adsorption tank 12. It includes an aeration valve 21, aeration nozzles 22, and piping. Gas enters the piping at the bottom of the adsorption tank 12 through the aeration valve 21. Several aeration nozzles 22 are located on the bottom surface of the tank 12. The aeration system 2 forms a large number of microbubbles at the bottom of the tank 12. These microbubbles adhere to the flocs within the tank 12, pushing the flocs to the surface of the liquid.

[0039] In order to improve the degree of floc separation, the present invention provides a magnetic adsorption system 3 within the adsorption tank 12. The magnetic adsorption system 3 includes a plurality of circulating magnetic conveyor belt mechanisms longitudinally arranged within the adsorption tank 12. Each circulating magnetic conveyor belt mechanism is arranged at a distance from each other. The circulating magnetic transmission belt mechanism includes a lower magnetic adsorption transmission belt 31, two upper and lower rollers 32, a driving pulley 33, a drive motor 34, a driven pulley 35, a transmission belt 36, a lower roller 37, and an upper roller 38. The upper and lower rollers 32 are horizontally mounted one above the other within the adsorption tank 12. After the upper and lower rollers 32 pass through the adsorption tank from one side, the driving pulley 33 is fixedly mounted at the end of the roller 32 at the bottom. The driving pulley 33 is driven to rotate by the drive motor 34. The driven pulley 35 is fixedly mounted at the end of the upper roller 32. The transmission belt 36 is connected between the driven pulley 35 and the driving pulley 33. The lower roller 37 is fixedly mounted on the lower roller 32, and the upper roller 38 is fixedly mounted on the upper roller 32. The lower roller 37 and the upper roller 38 are both arranged inside the adsorption tank 12, with the lower roller 37 located directly below the upper roller 38 and immersed in the electroplating wastewater, while the upper roller 38 is arranged above the liquid surface of the electroplating wastewater. The magnetic adsorption transmission belt 31 is sheathed on the outer surface of the lower roller 37 and the upper roller 38. The width of the magnetic adsorption transmission belt 31 basically covers the lateral range of the adsorption tank 12, such as Figure 2 As shown. Several rows of vertically arranged circulating transmission belt mechanisms all rotate in the same direction, and the range of several rows of vertically arranged circulating transmission belt mechanisms covers the range of the length of the adsorption pool 12, as shown. Figure 1 As shown in the figure, since the electroplating wastewater entering the adsorption tank 12 is mixed with magnetic powder and flocculant, the magnetism of the flocs causes them to be adsorbed on the surface of the magnetic adsorption belt 31 during the upward floating process pushed by the bubbles. They are then carried to the upper part of the liquid by the magnetic adsorption belt 31 and eventually discharged by the sewage system 4. Therefore, the provision of the magnetic adsorption system 3 improves the separation of the flocs and reduces the impact of premature microbubble rupture.

[0040] The sewage system 4 is arranged above the wastewater treatment tank 1. The sewage system 4 is a sewage structure driven by a circulating transmission belt, which comprises a front roller 41, a rear roller 42, a sewage conveying belt 43, and a sewage plate 44. The front roller 41 and the rear roller 42 are horizontally arranged above the wastewater treatment tank 1, and the central axes of the front roller 41 and the rear roller 42 are perpendicular to the central axes of the lower roller 37 and the upper roller 38. The front roller 41 is arranged on the end of the adsorption tank 12 in the wastewater treatment tank 1, and the rear roller 42 is arranged on the upper part of the sewage outlet 15. The sewage conveying belt 43 is sleeved on the front roller 41 and the rear roller 42, and the width of the sewage conveying belt 43 covers the entire upper space of the wastewater treatment tank 1. The sewage plate 44 is installed outside the sewage conveying belt 43. The sewage plates 44 are arranged in a row at equal intervals along the central axes of the front roller and the rear roller on the sewage conveying belt 43, and the end of the sewage plate 44 on one side of the wastewater treatment tank 1 extends into the spacing space of the adjacent circulating magnetic adsorption transmission belt mechanism and extends downward into the wastewater surface by a certain distance. The spacing between the adjacent sewage plates 44 is substantially equal to the width of the circulating magnetic adsorption transmission belt mechanism. On the sewage conveying belt 43, several rows of sewage plates 44 are arranged at equal intervals to form a circulating sewage system 4. The sewage system 4 is driven to rotate clockwise by the front roller and the rear roller through the motor, and the sewage plates 44 scrape and send the flocculation material floating on the water surface and the flocculation material adsorbed on the surface of the magnetic adsorption transmission belt 31 to the sewage outlet 15.

[0041] The structure of the magnetic adsorption transmission belt 31 will be described below. Figures 3-4 The structure of the magnetic adsorption transmission belt 31 will be described below.

[0042] The magnetic adsorption transmission belt 31 comprises magnetic adsorption belt segments 311, belt pins 312, and magnetic blocks 313. A plurality of magnetic adsorption belt segments 311 are connected end to end by the belt pins 312 to form a closed-loop magnetic adsorption transmission belt 31. The magnetic adsorption belt segments 311 are made of rubber material, and the belt pins 312 are made of hard plastic. The magnetic adsorption belt segment 311 comprises a top connecting ear 311a, a belt body 311b, and a bottom connecting ear 311c. The top connecting ear 311a is divided into two left and right parts, and a hollow slot 311d is formed in the middle of the two top connecting ears 311a. The bottom connecting ear 311c matches the shape of the hollow slot 311d, and the bottom connecting ear 311c extends into the hollow slot 311d. The belt pin 312 passes through the top connecting ear 311a of the lower magnetic adsorption belt segment 311, then passes through the bottom connecting ear 311c of the upper magnetic adsorption belt segment 311, and then passes through the top connecting ear 311a of the lower magnetic adsorption belt segment 311 again, connecting the upper and lower magnetic adsorption belt segments 311. The magnetic blocks 313 are arranged in a matrix in the inside of the belt body 311b, so that the belt body 311b forms a magnetic field space capable of adsorbing flocculation material.

[0043] As Figure 3As shown, the two adjacent circulating magnetic conveyor belt mechanisms of the magnetic adsorption system 3 rotate in the same direction. The magnetic adsorption belts 31 of the two adjacent circulating magnetic conveyor belt mechanisms are spaced apart by a second spacing S2. The space between the magnetic adsorption belts 31 of the two adjacent circulating magnetic conveyor belt mechanisms allows the electroplating wastewater to flow upward and adsorb floating flocs therein, forming an adsorption space. Because the two adjacent circulating magnetic conveyor belt mechanisms rotate in the same direction, within the adsorption space, the magnetic adsorption belt 31 on one side runs upward, defined as the upward conveyor belt U, while the magnetic adsorption belt 31 on the other side runs downward, defined as the downward conveyor belt D. Each adsorption space in the adsorption tank 12 contains both an upward conveyor belt U and a downward conveyor belt D. Electroplating wastewater injected from the bottom of the adsorption tank 12 flows upward to the connecting port 17. Passing through the adsorption space, the flocs adhered to the magnetic powder are propelled by the buoyancy of the microbubbles in the bottom aeration system 1 and the water flow, moving upward through the adsorption space to the top of the liquid surface P. As the flocculent passes through the adsorption space from bottom to top, it is gradually adsorbed to the surface of the magnetic adsorption transmission belt 31 due to the magnetism generated by the adsorption of the magnetic powder.

[0044] like Figure 3 As shown, the drainage plate 44 extends into the top layer of the adsorption space and includes a connecting rod 441 and a plate body 442. One end of the connecting rod 441 is connected to the surface of the drainage conveyor belt 43, and the other end is connected to the plate body 442. The width S1 of the plate body 442 is greater than the width of the connecting rod 441 and is approximately equal to the second spacing S2. The connecting rod 441 is in close contact with the surface of the downstream conveyor belt D across the width of the adsorption space and away from the surface of the upstream conveyor belt U. This creates a surplus space between the connecting rod 441, the upstream conveyor belt U, and the lower surface of the drainage conveyor belt 43. Flocculants adsorbed on the surface of the magnetic adsorption conveyor belt 31, particularly those on the upstream conveyor belt U, are scraped toward the drainage outlet 15 by the plate body 442 as they pass through the drainage plate 44. Flocculants that are not fully scraped away enter the side of the downstream conveyor belt D and are further scraped toward the drainage outlet 15 by the closely attached connecting rod 441 and plate body 442.

[0045] However, within the same adsorption space, due to the presence of an upward conveyor belt U and a downward conveyor belt D, the wastewater and flocs flowing over the surface of the downward conveyor belt D move in the opposite direction of that of the downward conveyor belt D. This creates a shear force between the two, which reduces the adsorption rate of flocs onto the downward conveyor belt D. This results in areas within the adsorption space where adsorption is weak. Flocs in these areas cannot be effectively and fully brought to the wastewater surface after premature bubble rupture. To address this technical issue, the present invention also incorporates a flow diversion system on the magnetic adsorption conveyor belt 31.

[0046] The deflector system includes a deflector plate 5, an opening rack 6, and a closing rack 7, all of which are made of plastic. The deflector plate 5 is mounted on each magnetic belt segment 311 of the magnetic drive belt 31. The deflector plate 5 comprises a rotating sleeve 51 and a deflector body 52. ​​The two rotating sleeves 51 are mounted on the ends of the magnetic belt segments 311 on both sides of the belt pin 312. The deflector body 52 is fixed between the two rotating sleeves 51. The deflector body 52 is arranged tangentially along the outer edge of the rotating sleeve 51 and covers the outer surface of the magnetic belt segments 311.

[0047] The end of the rotating sleeve 51 is provided with a toothed disc 51a, with a gear ring on its outer edge. The end face of the toothed disc 51a serves as a limiting surface 51b. A connecting key 312a is provided on the pin body where the belt pin 312 contacts the magnetically attracted belt segment 311, ensuring that the belt pin 312 does not rotate relative to the magnetically attracted belt segment 311. The end of the belt pin 312, extending beyond the rotating sleeve 51, has a flange 312b, one side of which contacts the limiting surface 51b of the toothed disc 51a. The limiting surface 51b is provided with two centrally symmetrical countersunk holes 51c. A spring-loaded limiting ball structure is installed within the countersunk holes 51c. The spring within the countersunk hole presses the limiting ball into contact with the end face of the flange 312b. The flange 312b is provided with two sets of limiting groove structures, one for the closed state limiting 312c and the other for the open state limiting 312d. Each set of limiting grooves includes two centrally symmetrical grooves, the radial positions of which correspond to the countersunk holes 51c. The closed state limit position 312c and the open state limit position 312d have a phase difference of an angle α. The closed state limit position 312c and the open state limit position 312d correspond to the closed position and the open position of the guide plate 5 respectively.

[0048] On the upward transmission belt U, the deflector 5 is always in the closed position. In this state, the deflector body 52 is tightly attached to the surface of the magnetic attraction belt segment 311, and the spring-loaded ball on the rotating sleeve 51 is restrained within the closed position limit 312c. When the magnetic attraction belt segment 311 enters the upper roller 38 from the upward transmission belt U, the rotating sleeve 51 and the belt pin 312 do not rotate. However, due to the curvature of the upper roller 38, the deflector body 52 separates from the surface of the magnetic attraction belt segment 311. Due to the extra space formed between the connecting rod 441, the upward transmission belt U, and the lower surface of the sewage conveyor belt 43, the rotation of the end of the deflector body 52 does not interfere with the moving sewage plate 44. After the magnetic attraction belt segment 311 passes the upper roller 38 and enters the downward transmission belt D, the deflector body 52 continues to be tightly attached to the surface of the magnetic attraction belt segment 311.

[0049] Both the opening rack 6 and the closing rack 7 are located within the downstream drive belt section D. The opening rack 6 is located within the interior of the downstream drive belt D, i.e., within the magnetic drive belt 31. In terms of height, the top of the opening rack 6 is more than the length of one magnetic belt segment 311 from the lowest end of the drain plate 44. When the rotating sleeve 51 passes the opening rack 6 position, the toothed disc 51a engages with the opening rack 6, driving the rotating sleeve 51 to rotate, overcoming the restraining action of the spring-loaded ball. When the toothed disc 51a disengages from the opening rack 6, the rotating sleeve 51 rotates from the closed position 312c to the open position 312d. This opens the deflector body 52 by an angle α.

[0050] When the deflector 52 on the downstream conveyor belt D is in the open state, the fluid in the adsorption space will generate a flow direction f that is tilted toward the upstream conveyor belt U on the other side when flowing through the surface of the deflector 52. That is, the deflector 5 is set toward the upstream rotating belt U on the other side, causing the electroplating wastewater carrying flocculants to be diverted to the surface of the upstream conveyor belt U. Because the movement direction of the upstream conveyor belt U on this side is the same as that of the flocculants and wastewater, the shear force is small, making it easier for the flocculants to be adsorbed to the surface of the upstream conveyor belt U. Of course, the configuration of the deflector 5 ensures that all the flocculants are adsorbed to the surface of the deflector 52.

[0051] The closing rack 7 is positioned outside the downstream transmission belt D, i.e., outside the magnetic drive belt 31. In the vertical direction, the bottom end of the closing rack 7 is located at the tangent point between the lower roller 37 and the downstream transmission belt D. When the rotating sleeve 51 passes the closing rack 7 position, the toothed disc 51a engages with the closing rack 7, driving the rotating sleeve 51 to reverse rotation, overcoming the restraining action of the spring-loaded ball. When the toothed disc 51a disengages from the closing rack 7, the rotating sleeve 51 rotates from the open position 312d to the closed position 312c. The deflector body 52 is thus closed by an angle α.

[0052] Furthermore, the present invention arranges the guide plate body 52 to be a thin plastic plate structure, which does not affect the scraping of flocculants on the plate surface by the sewage plate 44 .

[0053] Therefore, the present invention places magnetic adsorption system 3 above aeration system 2. Magnetic powder and flocculants are mixed into electroplating wastewater. The magnetic properties of the flocs cause them to be adsorbed on the surface of magnetic adsorption belt 31 during the upward floating process, propelled by bubbles. They are then carried to the upper surface of the liquid by magnetic adsorption belt 31 and ultimately discharged by sewage system 4. The provision of magnetic adsorption system 3 improves the separation of flocs and reduces the impact of premature microbubble rupture.

[0054] In addition, by arranging a rotatable rotating sleeve 51 and a guide plate body 52 on the magnetic adsorption belt segment 311, when the circulating magnetic adsorption system generates a shear force on the flocculants in the opposite direction of the movement, the electroplating wastewater carrying the flocculants is diverted from the downward transmission belt D with shear force to the surface of the upward transmission belt U, ensuring that the flocculants that have not fully floated up are fully adsorbed to the surface of the magnetic adsorption belt segment 311.

[0055] Furthermore, the structure of the plate 44 of the drainage system 4, and the positioning of the opening rack 6 and closing rack 7, ensure that the mutually moving magnetic adsorption system 3, drainage system 4, and diversion system do not interfere with each other, ensuring that flocculants are fully transported to the drainage outlet. The toothed disc on the rotating sleeve 51 and the limiting structure between it and the belt pin are compact in size, enabling controlled opening and closing of the diversion plate 52.

[0056] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0057] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0058] In the present invention, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0059] In the description of the specification, the description using the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" etc. means that the particular feature, structure, material or characteristic being described is included in at least one embodiment or example of the present application. The illustrative appearances of the above-mentioned terms in various places in the specification are not necessarily referred to the same embodiment or example. Moreover, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples. Furthermore, the description herein of certain examples does not necessarily exclude these examples from the scope of the application, and these examples can be combined with each other for the purpose of patentable inventions.

[0060] Although the embodiments of the present application have been shown and described, it would be appreciated by those skilled in the art that changes, modifications, alternatives and variations to these embodiments could be made without departing from the principles and spirit of the application, and the scope of the application is defined by the claims and their equivalents.

Claims

1. A magnetic adsorption treatment device for electroplating wastewater that fully separates flocs, characterized by: It includes wastewater treatment tank, aeration system, magnetic adsorption system, sewage system and diversion system; The wastewater treatment tank includes an outlet tank, an adsorption tank, a water inlet, a water outlet, a sewage outlet, a partition, and a connecting port; the outlet tank and the adsorption tank are arranged adjacent to each other and separated by a partition; a water inlet is provided at the bottom of the adsorption tank, and electroplating wastewater mixed with magnetic powder and flocculant enters the adsorption tank from the bottom through the water inlet; the water outlet is provided on the side wall of the bottom of the outlet tank, and the wastewater after flocculants are separated flows out from the water outlet; a connecting port is provided on the top of the partition, connecting the outlet tank and the top of the adsorption tank; the sewage outlet is provided on the top side wall of the outlet tank; the sewage discharge system is provided above the wastewater treatment tank and spans the adsorption tank, the outlet tank and the sewage outlet; The aeration system is arranged at the bottom of the adsorption tank; The magnetic adsorption system is arranged in the adsorption pool; the magnetic adsorption system includes a plurality of circulating magnetic adsorption conveyor belt mechanisms longitudinally arranged in the adsorption pool; each circulating magnetic adsorption conveyor belt mechanism is arranged at a certain distance; The circulating magnetic drive belt mechanism includes a magnetic drive belt, two upper and lower rollers, a lower roller, and an upper roller; the upper and lower rollers are horizontally mounted inside the adsorption tank, one above the other, with the lower roller fixedly sleeved on the lower roller and the upper roller fixedly sleeved on the upper roller; both the lower roller and the upper roller are arranged inside the adsorption tank, with the lower roller located directly below the upper roller and immersed in the electroplating wastewater, and the upper roller arranged above the liquid level of the electroplating wastewater; the magnetic drive belt is sleeved on the outer surface of the lower and upper rollers; The magnetic adsorption transmission belt includes magnetic adsorption belt segments, belt pins, and magnetic blocks. Several magnetic adsorption belt segments are connected end to end through the belt pins to form a closed loop magnetic adsorption transmission belt. The magnetic adsorption belt segments are made of rubber, and the belt pins are made of hard plastic. The belt pin passes through the top connecting ear of the lower magnetic adsorption belt segment, then passes through the bottom connecting ear of the upper magnetic adsorption belt segment, and then passes through the top connecting ear of the lower magnetic adsorption belt segment to connect the upper and lower magnetic adsorption belt segments. The magnetic blocks are arranged in a matrix shape inside the belt body. The sewage discharge system is a sewage discharge structure driven by a circulating conveyor belt, which includes a front roller, a rear roller, a sewage discharge conveyor belt, and a sewage discharge plate. The front roller and the rear roller are arranged horizontally above the wastewater treatment tank, and the central axis of the front roller and the rear roller are perpendicular to the central axis of the lower roller and the upper roller. The front roller is set at the end of the adsorption tank in the wastewater treatment tank, and the rear roller is set at the top of the sewage outlet. The sewage discharge conveyor belt is sleeved on the front roller and the rear roller. The sewage discharge plates are arranged in a row with equal spacing along the central axis of the front and rear rollers on the sewage discharge conveyor belt. The end of the sewage discharge plate on the side facing the wastewater treatment tank extends into the gap between the adjacent circulating magnetic transmission belt mechanisms and extends downward into the wastewater surface. The spacing between adjacent sewage discharge plates is equal to the width of the circulating magnetic transmission belt mechanism. On the sewage discharge conveyor belt, several rows of sewage discharge plates are arranged at equal spacing.

2. The electroplating wastewater magnetic adsorption treatment device for fully separating flocs according to claim 1, characterized in that: The sewage discharge plate includes a connecting rod and a plate body; one end of the connecting rod is connected to the surface of the sewage discharge conveyor belt, and the other end is connected to the plate body; the width of the plate body is greater than the width of the connecting rod, and the width of the plate body is equal to the distance between the magnetic adsorption transmission belts of two adjacent circulating magnetic conveyor belt mechanisms; the connecting rod is close to the surface of the downward transmission belt in the width direction of the adsorption space and is away from the surface of the upward transmission belt.

3. The electroplating wastewater magnetic adsorption treatment device for fully separating flocs according to claim 2, characterized in that: The guide system includes a guide plate, an open rack, and a closed rack, and the guide plate, the open rack, and the closed rack are all made of plastic; the guide plate is installed on each magnetic adsorption belt segment of the magnetic adsorption transmission belt; the guide plate includes two rotating sleeves and a guide plate body, the two rotating sleeves are arranged on both sides of the belt pin and extend out of the end of the magnetic adsorption belt segment, the guide plate body is fixed between the two rotating sleeves, the guide plate body is arranged along the tangential direction of the outer edge of the rotating sleeve, and the guide plate body covers the outer surface of the magnetic adsorption belt segment.

4. The electroplating wastewater magnetic adsorption treatment device for fully separating flocs according to claim 3, characterized in that: A toothed disc is provided at the end of the rotating sleeve, a gear ring is provided on the outer edge of the toothed disc, and the end face of the toothed disc is a limiting surface; a connecting key is provided on the pin body where the belt pin contacts the magnetic adsorption belt segment; the end of the belt pin has a flange after extending out of the rotating sleeve, and one side of the flange contacts the limiting surface of the toothed disc; two centrally symmetrical countersunk holes are provided on the limiting surface, and a spring limiting ball structure is installed in the countersunk hole, and two groups of limiting groove structures are provided on the flange, which are respectively for closed state limiting and open state limiting, and each group of limiting grooves includes two centrally symmetrical grooves, and the radial position of the grooves corresponds to the countersunk hole; the closed state limiting and the open state limiting are phase-differentiated by an angle α.

5. The electroplating wastewater magnetic adsorption treatment device for fully separating flocculants according to claim 4, characterized in that: The opening rack and the closing rack are both arranged on the downward transmission belt section; the opening rack is arranged in the internal space of the magnetic adsorption transmission belt, and in the height direction, the top end of the opening rack is greater than the length of a magnetic adsorption belt section from the lowest end of the sewage discharge plate; when the rotating sleeve passes through the opening rack position, the toothed disc engages with the opening rack, and when the toothed disc disengages from the opening rack, the rotating sleeve just rotates from the closed state limit to the open state limit.

6. The electroplating wastewater magnetic adsorption treatment device for fully separating flocs according to claim 5, characterized in that: The closed rack is arranged outside the downstream transmission belt and in the external space of the magnetic adsorption transmission belt. In the height direction, the bottom end of the closed rack is located at the tangent point of the lower roller and the downstream transmission belt; when the rotating sleeve passes through the closed rack position, the toothed disc engages with the closed rack, thereby driving the rotating sleeve to overcome the limiting effect of the spring limiting ball and rotate in the opposite direction. When the toothed disc disengages from the closed rack, the rotating sleeve just rotates from the open state limit to the closed state limit.

Images