Electroplating sewage magnetic adsorption treatment device capable of fully separating flocculate

Abstract

The electroplating sewage magnetic adsorption treatment device comprises a wastewater treatment tank, an aeration system, a magnetic adsorption system, a sewage discharge system and a flow guide system, the wastewater treatment tank comprises a water outlet tank, an adsorption tank, a water inlet, a water outlet, a drain outlet, a partition plate and a communication port; the drain outlet is formed in the side wall of the top of the water outlet tank; the sewage discharge system is arranged above the wastewater treatment tank and stretches across the adsorption tank, the water outlet tank and the sewage discharge port; the aeration system is arranged at the bottom of the adsorption tank; the magnetic adsorption system is arranged in the adsorption tank; the magnetic adsorption system is arranged above the aeration system, the electroplating wastewater is mixed with magnetic powder and a flocculating agent, and flocculates are adsorbed on the surface of the magnetic adsorption transmission belt when being pushed by bubbles to float upwards due to the magnetism of the flocculates, are carried to the upper part of the liquid level by the magnetic adsorption transmission belt, and are finally discharged by the sewage discharge system. By arranging the magnetic adsorption system, the separation degree of flocculates is improved, and the influence caused by early breakage of microbubbles is reduced.

Description

Technical Field

[0001] The 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 the electroplating factory contain a large amount of metal ions such as chromium, tin, nickel, cyanide, acid, and alkali, they generally contain organic additives. Therefore, the electroplating wastewater discharged from the electroplating plant 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 floccules, and the buoyancy of the bubbles pushes the floccules upward to the water surface, and then the floccules are discharged through the circulating slag discharge equipment. This method is efficient and suitable for large-scale treatment of electroplating wastewater. However, in this scheme, some bubbles are easily broken by hydraulic force 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 the larger floccules, resulting in poor separation of heavy metals in electroplating wastewater.

[0003] In order to overcome this shortcoming, the prior art also adopts the method of magnetic field adsorption, mixing magnetic powder with electroplating wastewater, and adsorbing the floccules to the magnetic unit under the action of an external magnetic field through the combination of magnetic powder and floccules. However, in the large-scale electroplating wastewater treatment process, because the flow direction of water is sometimes opposite to the movement direction of the brush magnetic unit, shear force will be generated when the magnetic unit and the floccules move in opposite directions, making it difficult for the floccules 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 floccules, which can fully combine the advantages of flotation separation and magnetic separation, and at the same time solve the technical problem of poor separation effect caused by premature bubble rupture in flotation separation, and the technical problem of strong water flow 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 object, the present invention adopts the following technical solutions: A magnetic adsorption treatment device for electroplating wastewater that fully separates flocculants, comprising a wastewater treatment tank, an aeration system, a magnetic adsorption system, a sewage discharge system and a diversion system; 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 connecting port; the water outlet tank and the adsorption tank are arranged adjacent to each other, and the water outlet tank and the adsorption tank are separated by a partition; a water inlet is arranged at the bottom of the adsorption tank, and electroplating wastewater mixed with magnetic powder and flocculant enters from the bottom of the adsorption tank through the water inlet; the water outlet is arranged on the side wall at the bottom of the water outlet tank, and the wastewater after the flocculants are separated flows out from the water outlet; a connecting port is arranged at the top of the partition, which connects the water outlet tank and the top of the adsorption tank; the sewage outlet is arranged on the top side wall of the water outlet tank; the sewage discharge system is arranged above the wastewater treatment tank and spans the adsorption tank, the water 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 comprises 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.

[0007] Preferably, the circulating magnetic absorption transmission belt mechanism includes a magnetic absorption transmission belt, two upper and lower rollers, a lower roller, and an upper roller; the upper and lower rollers are horizontally mounted one above the other inside the adsorption tank, the lower roller is fixedly sleeved on the lower roller, and the upper roller is fixedly sleeved on the upper roller; the lower roller and the upper roller are both arranged inside the adsorption tank, the lower roller is 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 magnetic absorption transmission belt is sleeved on the outside of the lower roller and the upper roller.

[0008] Preferably, 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 belt pins to form a closed-loop magnetic adsorption transmission belt; the magnetic adsorption belt segments are made of rubber material, 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.

[0009] Preferably, 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 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 sewage discharge conveyor belt is sleeved on the front roller and the rear roller.

[0010] Preferably, the sewage discharge plates are arranged in a row with equal spacing along the central axis direction of the front and rear rollers on the sewage discharge conveyor belt, and the end of the sewage discharge plate on the side facing the wastewater treatment tank extends into the spacing space between adjacent circulating magnetic suction transmission belt mechanisms and downward into the wastewater surface. The spacing between adjacent sewage discharge plates is equal to the width of the circulating magnetic suction transmission belt mechanism; on the sewage discharge conveyor belt, several rows of sewage discharge plates are arranged at equal spacing.

[0011] Preferably, 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 spacing 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 away from the surface of the upward transmission belt.

[0012] Preferably, 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 section 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 section, 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 section.

[0013] Preferably, a toothed disc is provided at the end of the rotating sleeve, a gear ring is provided at 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 section; 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 holes, and two groups of limiting groove structures are provided on the flange, which are respectively a closed state limit and an open state limit, and each group of limiting grooves includes two centrally symmetrical grooves, and the radial position of the grooves corresponds to the countersunk holes; the closed state limit and the open state limit have a phase difference of angle α.

[0014] Preferably, 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 position 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.

[0015] Preferably, the closing 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 closing rack is located at the intersection of the lower roller and the downstream transmission belt; when the rotating sleeve passes through the closing rack position, the toothed disc engages with the closing rack, thereby driving the rotating sleeve to overcome the limiting action of the spring limiting ball and rotate in the opposite direction. When the toothed disc disengages from the closing rack, the rotating sleeve just rotates from the open state limit position to the closed state limit position.

[0016] The beneficial effects of the present invention are: 1. The present invention sets the magnetic adsorption system above the aeration system, mixes magnetic powder and flocculant in the electroplating wastewater, and the magnetism of the flocs makes them adsorbed on the surface of the magnetic adsorption transmission belt during the floating process driven by bubbles, and are brought to the upper part of the liquid surface by the magnetic adsorption transmission belt, and finally discharged by the sewage discharge system. The setting of the magnetic adsorption system improves the separation degree of flocs and reduces the impact of premature rupture of microbubbles.

[0017] 2. By setting a rotatable rotating sleeve and guide plate body on the magnetic adsorption belt section, when the circulating magnetic adsorption system generates shear force on the flocculants in the opposite direction of movement, 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.

[0018] 3. The structure of the plate body, the positions of the opening rack and the closing rack of the sewage system in the present invention ensure that the mutually moving magnetic adsorption system, sewage system and diversion system will not interfere with each other, and ensure that the flocculants are fully transferred to the sewage outlet. The gear disc on the rotating sleeve and the limiting structure between the belt pin are compact in size, realizing the controllable opening and controllable closing of the diversion plate body. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front view of the processing device of the present invention; Figure 2 is a side view of the processing device of the present invention; Figure 3 This is a front view of the magnetic adsorption transmission belt structure of the present invention; Figure 4 It is a side view of the magnetic adsorption transmission belt structure of the present invention; Figure 5 It is a front view of the structure of the diversion system of the present invention; Figure 6 It is a side view of the structure of the diversion system of the present invention; Figure 7 This is a schematic diagram of the open structure of the guide plate of the present invention; Figure 8 It is a schematic diagram of the closed structure of the guide plate of the present invention; Fig. 9 It is a schematic diagram of the structure of the guide plate of the present invention; Fig.10 It is a schematic diagram of the limiting structure of the guide plate of the present invention; In the figure: wastewater treatment tank 1, aeration system 2, magnetic adsorption system 3, sewage system 4, water outlet tank 11, adsorption tank 12, water inlet 13, water outlet 14, sewage outlet 15, partition 16, connecting port 17, aeration valve 21, aeration nozzle 22, magnetic adsorption transmission belt 31, upper and lower rollers 32, driving pulley 33, driving motor 34, driven pulley 35, transmission belt 36, lower roller 37, upper roller 38, front roller 41, rear roller 42, sewage conveyor belt 43, sewage plate 44, magnetic adsorption belt Section 311, belt pin 312, magnetic block 313, top connecting ear 311a, belt body 311b, bottom connecting ear 311c, second spacing S2, upward transmission belt U, downward transmission belt D, connecting rod 441, plate body 442, guide plate 5, open rack 6, closed rack 7, rotating sleeve 51 and guide plate body 52, toothed disc 51a, connecting key 312a, limiting surface 51b, countersunk hole 51c, flange 312b, closed state limit 312c, open state limit 312d, flow direction f. DETAILED DESCRIPTION

[0020] The specific implementation of the present invention is described in detail below with reference to the accompanying drawings and preferred embodiments.

[0021] like Figure 1-10 The structure diagram of the magnetic adsorption treatment device for electroplating wastewater for fully separating flocculants is shown in the figure. The device comprises a wastewater treatment tank 1, an aeration system 2, a magnetic adsorption system 3, and a sewage discharge system 4.

[0022] like Figure 2 As shown, the wastewater treatment tank 1 is a rectangular cross-section water tank structure, and the wastewater treatment tank 1 includes a water outlet tank 11, an adsorption tank 12, a water inlet 13, a water outlet 14, a sewage outlet 15, a partition 16, and a connecting port 17. The water outlet tank 11 and the adsorption tank 12 are arranged adjacent to each other, and the water outlet tank 11 and the adsorption tank 12 are separated by a partition 16. The bottom of the adsorption tank 12 is provided with a water inlet 13, and the electroplating wastewater mixed with magnetic powder and flocculant enters from the bottom of the adsorption tank 12 through the water inlet 13. The water outlet 14 is arranged on the side wall at the bottom of the water outlet tank 11, and the wastewater after the flocculants are separated flows out from the water outlet 14. The top of the partition 16 is provided with a connecting port 17, which connects the top of the water outlet tank 11 and the top of the adsorption tank 12. The sewage outlet 15 is arranged on the top side wall of the outlet tank 11 . The sewage discharge system 4 spans the adsorption tank 12 , the outlet tank 11 and the sewage outlet 15 , and discharges the floating flocculants uniformly from the top of the wastewater treatment tank 1 through the sewage outlet 15 .

[0023] The aeration system 2 is arranged at the bottom of the adsorption tank 12. The aeration system 2 includes an aeration valve 21, an aeration nozzle 22 and a pipeline. The gas enters the pipeline arranged at the bottom of the adsorption tank 12 through the aeration valve 21, and a plurality of aeration nozzles 22 are arranged on the bottom surface of the adsorption tank 12. The aeration system 2 forms a large number of microbubbles at the bottom of the adsorption tank 12, and the microbubbles adhere to the floccules in the adsorption tank 12, pushing the floccules to float to the liquid surface of the flocculation tank 12.

[0024] In order to improve the degree of separation of flocculants, the present invention sets a magnetic adsorption system 3 in the adsorption tank 12. The magnetic adsorption system 3 includes a plurality of circulating magnetic conveyor belt mechanisms longitudinally arranged in the adsorption tank 12. Each circulating magnetic conveyor belt mechanism is arranged at a certain distance. 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 driving motor 34, a driven pulley 35, a transmission belt 36, a lower roller 37, and an upper roller 38. Among them, the upper and lower rollers 32 are horizontally mounted inside the adsorption tank 12 one above and one below. After the upper and lower rollers 32 pass through the adsorption tank from one side, the driving pulley 33 is fixedly installed at the end of the roller 32 at the bottom, and the driving pulley 33 is driven to rotate by the driving motor 34. The driven pulley 35 is fixedly installed at the end of the roller 32 at the top, and the transmission belt 36 is connected between the driven pulley 35 and the driving pulley 33. The lower roller 37 is fixedly sleeved on the lower roller 32, and the upper roller 38 is fixedly sleeved on the upper roller 32. The lower roller 37 and the upper roller 38 are both arranged inside the adsorption tank 12, the lower roller 37 is located directly below the upper roller 38, the lower roller 37 is immersed in the electroplating wastewater, and the upper roller 38 is arranged above the liquid surface of the electroplating wastewater. The magnetic adsorption transmission belt 31 is sleeved outside 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 The plurality of vertically arranged circulating belt mechanisms all rotate in the same direction, and the range of the plurality of vertically arranged circulating belt mechanisms covers the range of the length of the adsorption pool 12, as shown. Figure 1 As shown. Since the electroplating wastewater entering the adsorption tank 12 is mixed with magnetic powder and flocculant, the magnetism of the flocs makes them adsorbed on the surface of the magnetic adsorption transmission belt 31 during the floating process driven by bubbles, and brought to the upper part of the liquid surface by the magnetic adsorption transmission belt 31, and finally discharged by the sewage discharge system 4. Therefore, the separation degree of flocs is improved by setting the magnetic adsorption system 3, and the influence of premature rupture of microbubbles is reduced.

[0025] The sewage system 4 is arranged above the wastewater treatment tank 1. The sewage system 4 is a sewage structure driven by a circulating conveyor belt, which includes a front roller 41, a rear roller 42, a sewage conveyor belt 43, and a sewage plate 44. The front roller 41 and the rear roller 42 are arranged horizontally above the wastewater treatment tank 1, and the central axis of the front roller 41 and the rear roller 42 are perpendicular to the central axis 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 conveyor belt 43 is sleeved on the front roller 41 and the rear roller 42, and the width of the sewage conveyor belt 43 covers the upper space of the entire wastewater treatment tank 1. The sewage plate 44 is installed outside the sewage conveyor belt 43. The sewage discharge plates 44 are arranged in a row with equal spacing along the central axis direction of the front and rear rollers on the sewage discharge conveyor belt 43. The end of the sewage discharge plate 44 on the side facing the wastewater treatment tank 1 extends into the spacing space of the adjacent circulating magnetic suction transmission belt mechanism and extends downward into the wastewater surface for a certain distance. The spacing between adjacent sewage discharge plates 44 is roughly equal to the width of the circulating magnetic suction transmission belt mechanism. On the sewage discharge conveyor belt 43, several rows of sewage discharge plates 44 are arranged at equal spacing to form a circulating sewage discharge system 4. The sewage discharge system 4 drives the front and rear rollers to rotate clockwise through a motor. The sewage discharge plates 44 scrape the floccules floating on the water surface and the floccules adsorbed on the surface of the magnetic suction transmission belt 31 to the sewage outlet 15.

[0026] Combine the following Figure 3-4 The structure of the magnetic adsorption transmission belt 31 of the present invention is described.

[0027] The magnetic adsorption transmission belt 31 includes a magnetic adsorption belt section 311, a belt pin 312, and a magnetic block 313. A plurality of magnetic adsorption belt sections 311 are connected end to end through the belt pin 312 to form a closed-loop magnetic adsorption transmission belt 31. The magnetic adsorption belt section 311 is made of rubber material, and the belt pin 312 is made of hard plastic. The magnetic adsorption belt section 311 includes a top connecting ear 311a, a belt body 311b, and a bottom connecting ear 311c. The top connecting ear 311a is divided into two parts, a left and right part, and an empty slot 311d is formed between the two top connecting ears 311a. The shape of the bottom connecting ear 311c matches the empty slot 311d, and the bottom connecting ear 311c extends into the empty slot 311d. The belt pin 312 passes through the top connection ear 311a of the lower magnetic adsorption belt segment 311, and then passes through the bottom connection ear 311c of the upper magnetic adsorption belt segment 311, and then passes through the top connection ear 311a of the lower magnetic adsorption belt segment 311, connecting the upper and lower magnetic adsorption belt segments 31. The magnetic blocks 313 are arranged in a matrix inside the belt body 311b, so that the belt body 311b forms a magnetic field space capable of adsorbing flocculants.

[0028] like Figure 3As shown, the two adjacent circulating magnetic conveyor belt mechanisms of the magnetic adsorption system 3 rotate in the same direction. The spacing between the magnetic adsorption conveyor belts 31 of the two adjacent circulating magnetic conveyor belt mechanisms is the second spacing S2. In the space between the magnetic adsorption conveyor belts 31 of the two adjacent circulating magnetic conveyor belt mechanisms, the electroplating wastewater flows upward and adsorbs the floating floccules therein, forming an adsorption space. Since the two adjacent circulating magnetic conveyor belt mechanisms rotate in the same direction, in the adsorption space, the magnetic adsorption conveyor belt 31 on one side runs upward, which is defined as the upward conveyor belt U, and the magnetic adsorption conveyor belt 31 on the other side runs downward, which is defined as the downward conveyor belt D. In each adsorption space in the adsorption tank 12, there is an upward conveyor belt U and a downward conveyor belt D. The electroplating wastewater injected from the bottom of the adsorption tank 12 flows upward to the connecting port 17, passes through the adsorption space, and the floccules adhered with magnetic powder are driven by the buoyancy of the microbubbles of the bottom aeration system 1 and the water flow, and pass through the adsorption space from bottom to top to reach the top of the liquid surface P. When the floccules pass through the adsorption space from bottom to top, they are gradually adsorbed to the surface of the magnetic adsorption transmission belt 31 due to the magnetism generated by the adsorption of the magnetic powder.

[0029] like Figure 3 As shown, the sewage plate 44 extends into the top layer of the adsorption space, and the sewage plate 44 includes a connecting rod 441 and a plate body 442. One end of the connecting rod 441 is connected to the surface of the sewage 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 close to the surface of the downward transmission belt D in the width direction of the adsorption space and away from the surface of the upward transmission belt U, thereby forming a surplus space between the connecting rod 441, the upward transmission belt U and the lower surface of the sewage conveyor belt 43. The flocculants adsorbed on the surface of the magnetic adsorption transmission belt 31, especially the flocculants on the surface of the upward transmission belt U, are scraped toward the sewage outlet 15 by the plate body 442 when passing through the sewage plate 44; the flocculants that are not fully scraped away, after entering the side of the downward transmission belt D, continue to be scraped toward the sewage outlet 15 by the closely attached connecting rod 441 and the plate body 442.

[0030] However, in the same adsorption space, since there is an upward transmission belt U and a downward transmission belt D, the movement direction of the wastewater and floccules flowing through the surface of the downward transmission belt D is opposite to the movement direction of the downward transmission belt D. There is a shear force between the two. The existence of the shear force will reduce the adsorption rate of the floccules adsorbed on the downward transmission belt D, resulting in the existence of a region with weak adsorption in the adsorption space. The floccules in this region cannot be effectively and fully brought to the wastewater surface after the bubbles burst in advance. In order to solve this technical problem, the present invention also sets a diversion system on the magnetic adsorption transmission belt 31.

[0031] The guide system includes a guide plate 5, an open rack 6, and a closed rack 7, and the guide plate 5, the open rack 6, and the closed rack 7 are all made of plastic. The guide plate 5 is installed on each magnetic adsorption belt segment 311 of the magnetic adsorption transmission belt 31. The guide plate 5 includes a rotating sleeve 51 and a guide plate body 52, and the two rotating sleeves 51 are sleeved on the ends of the magnetic adsorption belt segment 311 on both sides of the belt pin 312, and the guide plate body 52 is fixed between the two rotating sleeves 51. The guide plate body 52 is arranged along the tangent direction of the outer edge of the rotating sleeve 51, and the guide plate body 52 covers the outer surface of the magnetic adsorption belt segment 311.

[0032] The end of the rotating sleeve 51 is provided with a toothed disc 51a, and the outer edge of the toothed disc 51a is provided with a gear ring, and the end face of the toothed disc 51a is a limiting face 51b. A connecting key 312a is provided on the pin body where the belt pin 312 contacts the magnetic adsorption belt segment 311, so as to ensure that the belt pin 312 does not rotate relative to the magnetic adsorption belt segment 311. The end of the belt pin 312 has a flange 312b after extending out of the rotating sleeve 51, and one side of the flange 312b contacts the limiting face 51b of the toothed disc 51a. Two centrally symmetrical countersunk holes 51c are provided on the limiting face 51b, and a spring limiting ball structure is installed in the countersunk hole 51c. The spring in the countersunk hole presses the limiting ball to be close to the end face of the flange 312b. Two groups of limiting groove structures are provided on the flange 312b, namely, a closed state limiting 312c and an open state limiting 312d, and each group of limiting grooves includes two centrally symmetrical grooves, and the radial position of the grooves corresponds to the countersunk hole 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.

[0033] 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 adsorption belt segment 311, and the spring limit ball on the rotating sleeve 51 is limited in the closed state limit 312c. When the magnetic adsorption belt segment 311 enters the upper roller 38 position from the upward transmission belt U, the rotating sleeve 51 and the belt pin 312 do not rotate, but the deflector body 52 is separated from the surface of the magnetic adsorption belt segment 311 due to the curvature of the upper roller 38. Since there is a surplus space 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 will not interfere with the moving sewage plate 44. After the magnetic adsorption belt segment 311 passes over 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 adsorption belt segment 311.

[0034] The opening rack 6 and the closing rack 7 are both arranged in the D section of the downward transmission belt. The opening rack 6 is arranged inside the downward transmission belt D, that is, inside the magnetic adsorption transmission belt 31. In the height direction, the distance between the top of the opening rack 6 and the lowest end of the sewage discharge plate 44 is greater than the length of a magnetic adsorption belt section 311. When the rotating sleeve 51 passes the position of the opening rack 6, the toothed disc 51a engages with the opening rack 6, thereby driving the rotating sleeve 51 to rotate by overcoming the limiting effect of the spring limiting ball. When the toothed disc 51a disengages from the opening rack 6, the rotating sleeve 51 just rotates from the closed state limit 312c to the open state limit 312d. The guide plate body 52 is thus opened by an angle α.

[0035] When the guide plate body 52 on the downward transmission belt D is in the open state, the fluid in the adsorption space will generate a flow direction f that is inclined toward the upward transmission belt U on the other side when flowing through the surface of the guide plate body 52, that is, the guide plate 5 is set toward the upward rotating belt U on the other side, resulting in the electroplating wastewater carrying flocculants being diverted to the surface of the upward transmission belt U. Since the movement direction of the upward transmission belt U on this side is the same as the movement direction of the flocculants and wastewater, the shear force is small, and the flocculants are more easily adsorbed to the surface of the upward transmission belt U. Of course, the setting of the guide plate 5 allows all the flocculants to be adsorbed to the surface of the guide plate body 52.

[0036] The closed rack 7 is arranged outside the downstream transmission belt D, i.e., outside the magnetic adsorption transmission belt 31. In the height direction, the bottom end of the closed 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 through the closed rack 7, the toothed disc 51a engages with the closed rack 7, thereby driving the rotating sleeve 51 to overcome the limiting effect of the spring limiting ball and rotate in the opposite direction. When the toothed disc 51a disengages from the closed rack 7, the rotating sleeve 51 just rotates from the open state limit 312d to the closed state limit 312c. The deflector body 52 is therefore closed by an angle α.

[0037] Furthermore, the guide plate body 52 of the present invention is configured as a thin plastic plate structure, which does not affect the scraping of flocculants on the plate surface by the sewage discharge plate 44 .

[0038] Therefore, the present invention arranges the magnetic adsorption system 3 above the aeration system 2, mixes the electroplating wastewater with magnetic powder and flocculant, and the magnetism of the flocs makes them adsorbed on the surface of the magnetic adsorption transmission belt 31 during the floating process driven by bubbles, and is brought to the upper part of the liquid surface by the magnetic adsorption transmission belt 31, and finally discharged by the sewage discharge system 4. The arrangement of the magnetic adsorption system 3 improves the separation degree of the flocs and reduces the influence of the premature rupture of microbubbles.

[0039] Moreover, by providing a rotatable rotating sleeve 51 and a deflector body 52 on the magnetic adsorption belt section 311, when the circulating magnetic adsorption system generates a shear force on the flocs in the direction opposite to the moving direction, the electroplating wastewater carrying the flocs is deflected from the downward transmission belt D with the shear force to the surface of the upward transmission belt U, ensuring that the flocs that have not fully floated are fully adsorbed onto the surface of the magnetic adsorption belt section 311.

[0040] In addition, the structure of the plate body 44 of the sewage discharge system 4, the positions of the opening rack 6 and the closing rack 7 in the present invention ensure that the mutually moving magnetic adsorption system 3, sewage discharge system 4 and diversion system do not interfere with each other, ensuring that the flocs are fully transferred to the sewage outlet. The limiting structure between the toothed disc on the rotating sleeve 51 and the belt pin is compact, realizing the controllable opening and closing of the deflector body 52.

[0041] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the drawings. It is 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 construed as a limitation to the present invention.

[0042] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, the meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0043] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or a communication; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0045] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A magnetic adsorption treatment device for electroplating wastewater that fully separates flocculants, characterized by: It includes wastewater treatment tank, aeration system, magnetic adsorption system, sewage system and diversion system; 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 connecting port; the water outlet tank and the adsorption tank are arranged adjacent to each other, and the water outlet tank and the adsorption tank are separated by a partition; a water inlet is arranged at the bottom of the adsorption tank, and electroplating wastewater mixed with magnetic powder and flocculant enters from the bottom of the adsorption tank through the water inlet; the water outlet is arranged on the side wall at the bottom of the water outlet tank, and the wastewater after the flocculants are separated flows out from the water outlet; a connecting port is arranged at the top of the partition, which connects the water outlet tank and the top of the adsorption tank; the sewage outlet is arranged on the top side wall of the water outlet tank; the sewage discharge system is arranged above the wastewater treatment tank and spans the adsorption tank, the water 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 comprises 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.

2. The electroplating wastewater magnetic adsorption treatment device for fully separating flocculants as claimed in claim 1, characterized in that: The circulating magnetic drive belt mechanism comprises a magnetic drive belt, two upper and lower rollers, a lower roller and an upper roller; the upper and lower rollers are horizontally mounted one above the other inside the adsorption tank, the lower roller is fixedly sleeved on the lower roller, and the upper roller is fixedly sleeved on the upper roller; the lower roller and the upper roller are both arranged inside the adsorption tank, the lower roller is 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 magnetic drive belt is sleeved on the outside of the lower roller and the upper roller.

3. The electroplating wastewater magnetic adsorption treatment device for fully separating flocculants as claimed in claim 2, characterized in that: The magnetic adsorption transmission belt includes magnetic adsorption belt segments, belt pins, and magnetic blocks; a plurality of magnetic adsorption belt segments are connected end to end through belt pins to form a closed-loop magnetic adsorption transmission belt; the magnetic adsorption belt segments are made of rubber material, 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.

4. The electroplating wastewater magnetic adsorption treatment device for fully separating flocculants as claimed in claim 3, characterized in that: 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 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 set on the end of the adsorption tank in the wastewater treatment tank, and the rear roller is set on the upper part of the sewage outlet; the sewage discharge conveyor belt is sleeved on the front roller and the rear roller.

5. The device for treating electroplating wastewater by magnetic adsorption for fully separating flocculants as claimed in claim 4, characterized in that: The sewage discharge plates are arranged in a row with equal spacing along the central axis direction 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 spacing space of the adjacent circulating magnetic suction transmission belt mechanism and extends downward into the wastewater surface. The spacing between adjacent sewage discharge plates is equal to the width of the circulating magnetic suction transmission belt mechanism. On the sewage discharge conveyor belt, several rows of sewage discharge plates are arranged at equal spacing.

6. The device for treating electroplating wastewater by magnetic adsorption for fully separating flocculants as claimed in claim 5, 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 magnetic adsorption transmission belt spacing 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 away from the surface of the upward transmission belt.

7. The device for treating electroplating wastewater by magnetic adsorption for fully separating flocculants as claimed in claim 6, 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 tangent direction of the outer edge of the rotating sleeve, and the guide plate body covers the outer surface of the magnetic adsorption belt segment.

8. The device for treating electroplating wastewater by magnetic adsorption for fully separating flocculants as claimed in claim 7, characterized in that: A toothed disc is arranged at the end of the rotating sleeve, a gear ring is arranged at the outer edge of the toothed disc, and the end face of the toothed disc is a limiting surface; a connecting key is arranged on the pin body where the belt pin contacts the magnetic adsorption belt section; 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 arranged on the limiting surface, and a spring limiting ball structure is installed in the countersunk holes, and two groups of limiting groove structures are arranged on the flange, which are respectively a closed state limit and an open state limit, and each group of limiting grooves includes two centrally symmetrical grooves, and the radial position of the grooves corresponds to the countersunk holes; the closed state limit and the open state limit have a phase difference of angle α.

9. The device for treating electroplating wastewater by magnetic adsorption for fully separating flocculants as claimed in claim 8, 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.

10. The device for treating electroplating wastewater by magnetic adsorption for fully separating flocculants as claimed in claim 9, characterized in that: The closed rack is arranged outside the downstream transmission belt and outside 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.

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