An electroplating wastewater recovery device for flocculation precipitation

Abstract

The present invention discloses a flocculation and sedimentation device for recovering electroplating wastewater, which relates to the technical field of wastewater treatment and includes a wastewater treatment tank body; through the arrangement of the upper baffle plate and the lower baffle plate, the flocs are prevented from floating upward. In the flocculation process, a flocculant needs to be added to promote the formation of flocs from pollutants. If the flocs float upward and are discharged with the supernatant liquid, it means that the flocculant is also carried away. Avoiding this situation can make the flocculant play a more sufficient role, reduce the dosage of the flocculant, and thus reduce the treatment cost. In addition, when the flocs can effectively aggregate and settle instead of floating and being lost, the entire flocculation and sedimentation process can be completed faster, avoiding affecting the wastewater treatment efficiency. Additionally, the purpose of the flocculation process is to remove pollutants in the water. If the flocs float into the supernatant liquid and are discharged, it will cause some pollutants not to be completely removed, thus affecting the water quality of the effluent. Avoiding this situation can reduce the residues of pollutants such as suspended solids, organic matter, and heavy metals in the water.

Description

Technical Field

[0001] The present invention relates to the technical field of wastewater treatment, and specifically relates to a flocculation precipitation electroplating wastewater recovery device. Background Art

[0002] The sources of electroplating wastewater generally include: (1) cleaning water for plated parts; (2) waste electroplating solution; (3) other wastewater, including floor flushing water in the workshop, electrode plate brushing water, condensate water from ventilation equipment, and various bath solutions and drainage caused by bath leakage or improper operation and management, such as "running, overflowing, dripping, and leaking"; (4) equipment cooling water, which is not contaminated except for the increase in temperature during use.

[0003] The flocculation precipitation method is a commonly used physical method in electroplating wastewater treatment. By adding a flocculant to the electroplating wastewater, small suspended particles in the electroplating wastewater can be aggregated to form larger floc sludge. Then, the electroplating wastewater is allowed to stand still, so that the sludge settles to the bottom, and the clear liquid can be discharged from above.

[0004] However, in the actual implementation process, the flocculation precipitation generated in the sedimentation tank is affected by various factors. The effect of the flocculant is greatly affected by the pH value. When the pH value of the water body deviates from the optimal working range of the flocculant, the flocculation effect will be poor, and the formed flocs will redisperse. Moreover, high-concentration organic matter will interfere with the flocculation process, making it difficult for the flocculant to effectively bridge the particles and form stable flocs. In this case, even if flocs are formed, their structure is not tight enough and is prone to floating under the influence of external factors.

[0005] Heavy metal ions and harmful chemical substances in electroplating wastewater need to be removed through processes such as flocculation precipitation. The floating of flocs will cause these pollutants to return to the water again, resulting in the over-standard of the effluent water quality. Moreover, the floating flocs are discharged with the clear liquid and will gradually decompose in the natural environment, releasing the heavy metal ions and harmful substances contained therein. These substances will re-enter the water body and soil, causing secondary pollution to the surrounding environment.

[0006] Therefore, we propose a flocculation precipitation electroplating wastewater recovery device to solve the above problems. Summary of the Invention

[0007] Technical Problems to be Solved

[0008] In view of this, aiming at the deficiencies of the prior art, the present invention provides a flocculation precipitation electroplating wastewater recovery device to solve the problems raised in the above background art.

[0009] Technical Solutions

[0010] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a flocculation and sedimentation electroplating wastewater recovery device, comprising a wastewater treatment tank body, a partition is fixedly installed on the top of the inner wall of the wastewater treatment tank body, an emptying valve is equidistantly and detachably installed inside the partition, a stirring paddle is rotatably connected inside the wastewater treatment tank body, one end of the stirring paddle penetrates and extends to the outside of the wastewater treatment tank body, and the end of the stirring paddle that penetrates the outside of the wastewater treatment tank body is fixedly connected to the output shaft of an external motor, a flocculant delivery pipeline is fixedly installed through the outer wall of the wastewater treatment tank body, a sedimentation tank is fixedly installed at the bottom of the inner wall of the wastewater treatment tank body, and also includes a blocking component arranged inside the wastewater treatment tank body;

[0011] The blocking assembly includes a reciprocating screw rod which is symmetrically rotatably connected to the inside of the wastewater treatment tank body. The top end of the reciprocating screw rod is connected to a driving motor through a transmission belt. A guide rod is symmetrically fixedly connected to the inner wall of the wastewater treatment tank body away from the reciprocating screw rod. A filter plate is slidably connected to the outer surface of the guide rod. An upper blocking plate is slidably connected to the reciprocating screw rod and the outer surface of the guide rod. A lower blocking plate is equidistantly fixedly connected to the lower surface of the upper blocking plate. The reciprocating screw rod and the outer surface of the guide rod are slidably connected to the lower blocking plate. The upper surface of the lower blocking plate is equidistantly fixedly connected to the upper blocking block. Limiting springs are sleeved on the outer surfaces of the reciprocating screw rod and the guide rod.

[0012] Preferably, the side wall of the sedimentation tank is inclined, and the flocculant delivery pipeline is fixedly connected to the output end of the external flocculant storage device.

[0013] Preferably, the driving motor is fixedly connected to the outer wall of the wastewater treatment tank body, the filter plate is connected to the outer surface of the reciprocating screw by an internal thread on the side away from the guide rod, the filter plate, the upper blocking plate and the lower blocking plate are vertically arranged on the outer surfaces of the reciprocating screw and the guide rod from top to bottom, a hollow groove is penetrated through the upper blocking plate, the number and size of the upper clamping blocks are matched with the hollow groove, a through groove is penetrated through the lower blocking plate, the number and size of the lower clamping blocks are matched with the through groove, a limit spring is arranged on the upper and lower sides of the upper blocking plate, and the end of the limit spring away from the upper blocking plate respectively contacts the bottom surface of the filter plate and the top surface of the lower blocking plate.

[0014] Preferably, it also includes a cleaning assembly disposed on the lower blocking plate;

[0015] The cleaning component includes sliding grooves symmetrically opened on the upper surfaces of both sides of the lower blocking plate, the sliding grooves are slidably connected with sliders, the sliders are rotatably connected with connecting rods, the connecting rods are rotatably connected to the bottom surface of the upper blocking plate at one end away from the sliders, the side walls of the sliders are fixedly connected with gap cleaning pieces, the gap cleaning pieces are slidably connected to the outer surface of the upper blocking block, the sliding grooves are fixedly connected with connecting springs, the connecting springs are fixedly connected to the side surfaces of the sliders at one end away from the groove walls of the sliding grooves, and the two connecting rods are centrally symmetrically arranged with a reference to the center point of the lower blocking plate.

[0016] Preferably, it further includes a positioning plate vibration assembly disposed inside the wastewater treatment tank body;

[0017] The vibration assembly includes a columnar guide rod fixedly connected to the center of the bottom surface of the partition plate. A spiral groove is formed on the outer surface of the top of the columnar guide rod. A limiting block is slidably connected to the outer surface of the top end of the columnar guide rod. A wedge block is fixedly connected to the inner wall of the limiting block. Upper hemispherical vibration blocks are fixedly connected to the outer surface of the bottom of the limiting block at equal intervals in a circumferential array. A connecting member is slidably connected to the outer surface of the columnar guide rod. Lower hemispherical vibration blocks are fixedly connected to the outer surface of the top of the connecting member at equal intervals in a circumferential array. A pulling spring is fixedly connected to the outer surface of the limiting block.

[0018] Preferably, the columnar guide rod penetrates through the filter plate, the upper blocking plate, and the lower blocking plate and extends to the bottom of the inner wall of the wastewater treatment tank. One end of the wedge block away from the limiting block is slidably connected inside the spiral groove. The bottom outer surface of the connecting member is fixedly connected to the filter plate. The connecting member is slidably connected inside the limiting block. The upper hemispherical vibration blocks and the lower hemispherical vibration blocks arranged in a circumferential array are arranged alternately. The lower hemispherical vibration blocks are located on the movement track of the upper hemispherical vibration blocks.

[0019] Preferably, it further includes a connection assembly disposed below the lower blocking plate;

[0020] The connection assembly includes a first rack symmetrically and fixedly connected to the lower surface of the lower blocking plate. One end of the columnar guide rod penetrating through the lower blocking plate is fixedly connected with a positioning block. Gears are symmetrically and rotatably connected inside the positioning block. Second racks are meshed with the sides of the gears.

[0021] Preferably, both the first rack and the second rack are vertically slidably connected to the inner wall of the sedimentation tank. The first rack and the second rack are centrosymmetrically arranged with the center point of the gear as the reference.

[0022] Preferably, it further includes a scraping assembly disposed inside the sedimentation tank;

[0023] The scraping assembly includes a positioning plate fixedly connected to the bottom end of the second rack. Limiting grooves are formed inside both sides of the positioning plate. Scrapers are slidably connected inside the limiting grooves. Fixed springs are fixedly connected to the inside of the scrapers at equal intervals.

[0024] Preferably, the positioning plate is slidably connected to the outer wall of the bottom end of the columnar guide rod. One side of the scraper away from the positioning plate abuts against the side wall of the sedimentation tank. One end of the fixed spring away from the scraper is fixedly connected to the groove wall of the limiting groove.

[0025] Beneficial effects

[0026] Compared with the prior art, the present invention provides a flocculation and precipitation electroplating wastewater recovery device, which has the following beneficial effects:

[0027] By setting the upper baffle and the lower baffle, the floating of flocs can be avoided. In the flocculation process, a flocculant needs to be added to promote the formation of flocs from pollutants. If the flocs float and are discharged with the supernatant, it means that the flocculant is also carried away. Avoiding this situation can make the flocculant play a more sufficient role, reduce the dosage of the flocculant, and thus reduce the treatment cost. In addition, when the flocs can effectively aggregate and settle instead of floating and being lost, the entire flocculation and sedimentation process can be completed faster, avoiding affecting the wastewater treatment efficiency. Moreover, the purpose of the flocculation process is to remove pollutants in the water. If the flocs float to the supernatant and are discharged, it will cause some pollutants not to be completely removed, thus affecting the effluent quality. Avoiding this situation can reduce the residues of pollutants such as suspended solids, organic matter, and heavy metals in the water;

[0028] By setting the upper hemispherical vibration block and the lower hemispherical vibration block that vibrate continuously, the filter plate can be made to vibrate constantly. During the flocculation process, some flocs may adhere to the filter plate. The vibration of the filter plate can make these flocs fall off more easily and re-enter the liquid to participate in the subsequent treatment process. As the flocs keep falling off, the performance of the filter plate can be maintained stable. If the flocs accumulate continuously on the filter plate, it will lead to an increase in the filtration resistance and a deterioration of the filtration effect. However, the vibration prompts the flocs to fall off in time, enabling the filter plate to always maintain good filtration performance;

[0029] Through the vibration of the filter plate, when the upper baffle and the lower baffle are clamped together as a whole through the lower clamping block and the upper clamping block, at this time the filter plate will also fit with the surface of the upper baffle. Therefore, during the vibration of the filter plate, the vibration of the filter plate will be synchronously transmitted to the upper baffle and the lower baffle, thereby vibrating the flocs floating on the surface of the lower baffle during the flocculation and sedimentation process of electroplating wastewater, making the blocked flocs break away from the surface of the lower baffle, thus avoiding the gradual accumulation of floating flocs on the surface of the lower baffle and affecting the use of the lower baffle, and further extending the service life of the lower baffle;

[0030] By setting the gap cleaning member, the floating flocs deposited on the outer surfaces of the lower baffle and the upper clamping block can be cleaned, avoiding the deposition of flocs from affecting the blocking effect of the lower baffle on the floating flocs. In addition, the gap cleaning member can synchronously clean the through grooves opened on the lower baffle, avoiding the deposition of flocs inside the lower baffle and affecting the clamping state formed by the lower baffle and the upper baffle through the upper clamping block and the lower clamping block, and ensuring the tight fit between the upper baffle and the lower baffle;

[0031] Through the settings of the scraper, positioning plate, upper blocking plate, lower blocking plate, and filter plate, the water doped inside the deposited flocs can be squeezed, and reducing the water content of the flocs can significantly reduce the volume of sludge. During the wastewater treatment process, reducing the water content of the flocs can make the flocs settle to the bottom of the water faster. According to Stokes' law, the sedimentation velocity of particles is proportional to the square of their radius and inversely proportional to the viscosity of the liquid. When the water content of the flocs decreases, their effective radius relatively increases and their density relatively increases, thus accelerating the sedimentation velocity;

[0032] Through the setting that the scraper always fits the inner wall of the sedimentation tank, the scraper can clean the sludge attached to the surface of the sedimentation tank, thereby reducing the sludge accumulation on the surface of the sedimentation tank. The sludge accumulation will change the flow direction and velocity of the water flow, resulting in short circuit flow. The so-called short circuit flow means that part of the sewage flows out of the sedimentation tank without sufficient sedimentation time. The scraper cleaning the sludge can avoid the occurrence of short circuit flow phenomenon and make the sewage have a more uniform flow state and residence time in the sedimentation tank. Brief Description of the Drawings

[0033] Figure 1 is a schematic diagram of the overall external structure of the present invention;

[0034] Figure 2 is a schematic diagram of the internal sectional structure of the wastewater treatment tank body of the present invention;

[0035] Figure 3 is a schematic diagram of the positional relationship at the filter plate of the present invention;

[0036] Figure 4 is a schematic diagram of the positional relationship at the connecting member of the present invention;

[0037] Figure 5 is a schematic diagram of the positional relationship at the lower blocking plate of the present invention;

[0038] Figure 6 is a schematic diagram of the sectional structure at the limit block and the connecting member of the present invention;

[0039] Figure 7 is a schematic diagram of the connection relationship at the second rack of the present invention;

[0040] Figure 8 For the present invention Figure 7 is an enlarged schematic diagram of the structure at position A;

[0041] Figure 9 is a schematic diagram of the internal sectional structure of the positioning plate of the present invention.

[0042] In the figure: 11. Wastewater treatment tank body; 12. Partition board; 13. Drain valve; 14. Stirring paddle; 15. Flocculant conveying pipeline; 16. Sedimentation tank;

[0043] 21. Reciprocating lead screw; 22. Driving motor; 23. Guide rod; 24. Filter plate; 25. Upper blocking plate; 26. Lower clamping block; 27. Lower blocking plate; 28. Upper clamping block; 29. Limiting spring;

[0044] 31. Chute; 32. Slide block; 33. Connecting rod; 34. Gap cleaning part; 35. Connecting spring;

[0045] 41. Columnar guide rod; 42. Spiral groove; 43. Limiting block; 44. Wedge block; 45. Upper hemispherical vibration block; 46. Connector; 47. Lower hemispherical vibration block; 48. Pulling spring;

[0046] 51. First toothed rod; 52. Positioning block; 53. Gear; 54. Second toothed rod;

[0047] 61. Positioning plate; 62. Limiting groove; 63. Scraper; 64. Fixed spring. Detailed implementation mode

[0048] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0049] Embodiments of the present invention

[0050] Please refer to Figures 1 to 7 , a flocculation precipitation electroplating wastewater recovery device, including a wastewater treatment tank body 11, a partition plate 12 is fixedly installed at the top of the inner wall of the wastewater treatment tank body 11, evacuation valves 13 are detachably installed at equal intervals inside the partition plate 12, a stirring paddle 14 is rotatably connected inside the wastewater treatment tank body 11, one end of the stirring paddle 14 penetrates and extends to the outside of the wastewater treatment tank body 11, and the end of the stirring paddle 14 penetrating outside the wastewater treatment tank body 11 is fixedly connected to the output shaft of an external motor. A flocculant conveying pipeline 15 is fixedly installed through the outer wall of the wastewater treatment tank body 11, a sedimentation tank 16 is fixedly installed at the bottom of the inner wall of the wastewater treatment tank body 11, and a blocking assembly is further arranged inside the wastewater treatment tank body 11;

[0051] The blocking assembly includes reciprocating lead screws 21 symmetrically and rotatably connected inside the wastewater treatment tank 11. The top ends of the reciprocating lead screws 21 are both drivingly connected to a driving motor 22 through a transmission belt. On the side of the inner wall of the wastewater treatment tank 11 far from the reciprocating lead screws 21, guide rods 23 are symmetrically and fixedly connected. A filter plate 24 is slidably connected to the outer surface of the guide rods 23. An upper blocking plate 25 is slidably connected to the outer surfaces of the reciprocating lead screws 21 and the guide rods 23. Lower clamping blocks 26 are fixedly connected to the lower surface of the upper blocking plate 25 at equal intervals. A lower blocking plate 27 is slidably connected to the outer surfaces of the reciprocating lead screws 21 and the guide rods 23. Upper clamping blocks 28 are fixedly connected to the upper surface of the lower blocking plate 27 at equal intervals. Limiting springs 29 are sleeved on the outer surfaces of the reciprocating lead screws 21 and the guide rods 23.

[0052] Among them, the side wall of the sedimentation tank 16 is inclined. The flocculant delivery pipe 15 is fixedly connected to the output end of the external flocculant storage device.

[0053] Among them, the driving motor 22 is fixedly connected to the outer wall of the wastewater treatment tank 11. The inner side of the filter plate 24 far from the guide rod 23 is threadedly connected to the outer surface of the reciprocating lead screw 21. The filter plate 24, the upper blocking plate 25, and the lower blocking plate 27 are arranged vertically from top to bottom on the outer surfaces of the reciprocating lead screw 21 and the guide rod 23. Hollow slots are formed through the upper blocking plate 25. The number and size of the upper clamping blocks 28 are adapted to the hollow slots. Through slots are formed through the lower blocking plate 27. The number and size of the lower clamping blocks 26 are adapted to the through slots. The limiting springs 29 are arranged on both the upper and lower sides of the upper blocking plate 25. One end of the limiting spring 29 far from the upper blocking plate 25 abuts against the bottom surface of the filter plate 24 and the top surface of the lower blocking plate 27 respectively.

[0054] Among them, hydrophobic coatings are applied to the surfaces of the upper blocking plate 25, the lower clamping blocks 26, the lower blocking plate 27, and the upper clamping blocks 28.

[0055] Among them, card slots adapted to the gap cleaning member 34 are formed on the lower surfaces of both sides of the upper blocking plate 25.

[0056] Further embodiments

[0057] Please refer to Figure 3 and Figure 5 , the electroplating wastewater recovery device for flocculation precipitation further includes a cleaning assembly arranged on the lower blocking plate 27;

[0058] The cleaning component includes sliding grooves 31 symmetrically formed on the upper surfaces of both sides of the lower baffle 27. Sliders 32 are slidably connected inside the sliding grooves 31. Connecting rods 33 are rotatably connected inside the sliders 32. One end of the connecting rod 33 away from the slider 32 is rotatably connected to the bottom surface of the upper baffle 25. Gap cleaning members 34 are fixedly connected to the side walls of the sliders 32. The gap cleaning members 34 are slidably connected to the outer surface of the upper block 28. A connecting spring 35 is fixedly connected inside the sliding groove 31. One end of the connecting spring 35 away from the groove wall of the sliding groove 31 is fixedly connected to the side surface of the slider 32. The two connecting rods 33 are symmetrically arranged with the center point of the lower baffle 27 as the reference.

[0059] Among them, the connecting spring 35 is set in a stretched state in the initial state.

[0060] Further embodiments

[0061] Please refer to Figures 3 to 7 and Figure 9 The electroplating wastewater recovery device for flocculation precipitation further includes a positioning plate 61 vibration component arranged inside the wastewater treatment tank 11;

[0062] The vibration component includes a columnar guide rod 41 fixedly connected to the center of the bottom surface of the partition plate 12. A spiral groove 42 is formed on the outer surface of the top of the columnar guide rod 41. A limit block 43 is slidably connected to the outer surface of the top end of the columnar guide rod 41. A wedge block 44 is fixedly connected to the inner wall of the limit block 43. Upper hemispherical vibration blocks 45 are fixedly connected to the outer surface of the bottom of the limit block 43 at equal intervals in a circumferential array. A connecting member 46 is slidably connected to the outer surface of the columnar guide rod 41. Lower hemispherical vibration blocks 47 are fixedly connected to the outer surface of the top of the connecting member 46 at equal intervals in a circumferential array. A pulling spring 48 is fixedly connected to the outer surface of the limit block 43.

[0063] Among them, the columnar guide rod 41 penetrates through the filter plate 24, the upper baffle 25 and the lower baffle 27 and extends to the bottom of the inner wall of the wastewater treatment tank 11. One end of the wedge block 44 away from the limit block 43 is slidably connected inside the spiral groove 42. The bottom outer surface of the connecting member 46 is fixedly connected to the filter plate 24. The connecting member 46 is slidably connected inside the limit block 43. The upper hemispherical vibration blocks 45 and the lower hemispherical vibration blocks 47 arranged in a circumferential array are arranged in an interleaved manner. The lower hemispherical vibration blocks 47 are located on the movement track of the upper hemispherical vibration blocks 45.

[0064] Among them, one end of the pulling spring 48 away from the limit block 43 is fixedly connected to the upper surface of the filter plate 24.

[0065] Further embodiments

[0066] Please refer to Figure 5 , Figure 7 and Figure 8 The electroplating wastewater recovery device for flocculation precipitation further includes a connection component arranged below the lower baffle 27;

[0067] The connecting component includes a first toothed rod 51 symmetrically and fixedly connected to the lower surface of the lower baffle 27. One end of the columnar guide rod 41 penetrates through the outer surface of the lower baffle 27 and is fixedly connected with a positioning block 52. Inside the positioning block 52, two gears 53 are symmetrically and rotatably connected. On the sides of the gears 53, second toothed rods 54 are engaged respectively.

[0068] Among them, the first toothed rod 51 is engaged with the gears 53. The first toothed rod 51 and the second toothed rods 54 are both vertically slidably connected to the inner wall of the sedimentation tank 16. The first toothed rod 51 and the second toothed rods 54 are symmetrically arranged with the center point of the gears 53 as the reference.

[0069] A further embodiment

[0070] Please refer to Figure 7 and Figure 9 , the electroplating wastewater recovery device for flocculation sedimentation further includes a scraping component arranged inside the sedimentation tank 16;

[0071] The scraping component includes a positioning plate 61 fixedly connected to the bottom end of the second toothed rod 54. Inside both sides of the positioning plate 61, limiting grooves 62 are opened. Inside the limiting grooves 62, scraping plates 63 are slidably connected. Inside the scraping plates 63, fixing springs 64 are fixedly connected at equal intervals.

[0072] Among them, the positioning plate 61 is slidably connected to the outer wall of the bottom end of the columnar guide rod 41. One side of the scraping plate 63 away from the positioning plate 61 abuts against the side wall of the sedimentation tank 16. One end of the fixing spring 64 away from the scraping plate 63 is fixedly connected to the groove wall of the limiting groove 62.

[0073] Among them, one side of the scraping plate 63 away from the positioning plate 61 is set as an inclined plane, and the inclined plane fits with the inner wall of the sedimentation tank 16. The fixing spring 64 is set in a compressed state in the initial state.

[0074] The working process and principle of the overall content of the above embodiment are as follows:

[0075] The staff injects the preliminarily treated electroplating wastewater through the top of the wastewater treatment tank body 11. Subsequently, the staff starts the external motor. Since the output shaft end of the external motor is fixedly connected to one end of the stirring paddle 14 penetrating through the wastewater treatment tank body 11, the start of the external motor will cause the stirring paddle 14 to rotate inside the wastewater treatment tank body 11, stirring the electroplating wastewater to assist the full mixing of various components inside the electroplating wastewater. After the stirring is completed, the staff can open the drain valve 13, so that the stirred electroplating wastewater above the partition plate 12 contacts the filter plate 24 and is filtered through the filter plate 24;

[0076] It should be noted that the opening and closing of the drain valve 13 can be controlled by an existing electronic control device, so it will not be elaborated here;

[0077] After the electroplating wastewater comes into contact with the filter plate 24, the solid impurities in the electroplating wastewater that cannot pass through the filter plate 24 will be blocked by the filter plate 24. The electroplating wastewater filtered by the filter plate 24 will successively pass through the upper baffle plate 25 and the lower baffle plate 27, and finally enter the inside of the sedimentation tank 16. Subsequently, the staff will transport the flocculant in the external flocculant storage device into the wastewater treatment tank body 11 through the flocculant conveying pipeline 15, so that the fine suspended particles in the electroplating wastewater will aggregate to form larger floc sludge. Then, the electroplating wastewater is allowed to stand, and the sludge will settle on the surface of the sedimentation tank 16. The electroplating wastewater after flocculation treatment will be divided into supernatant and sludge precipitation. The staff can discharge the supernatant from the top of the wastewater treatment tank body 11;

[0078] In the above process, when the flocculant forms floc sludge precipitation in the electroplating wastewater, due to the presence of a large amount of dissolved gas in the water or the generation of gas (such as in the biological treatment process), these gases will adhere to the surface of the flocs, or the pH value of the water body deviates from the optimal working range of the flocculant, resulting in poor flocculation effect, causing the formed flocs to redisperse, and ultimately causing the flocs to float, so that some flocs exist in the supernatant and are discharged with the supernatant, resulting in environmental pollution;

[0079] Therefore, during the flocculation process, the floating flocs will pass through the lower baffle plate 27, the upper baffle plate 25 and the filter plate 24. Among them, most of the floating flocs will first come into contact with the lower baffle plate 27 and adhere to the lower surface of the lower baffle plate 27. Subsequently, a small amount of flocs will pass through the through groove formed in the lower baffle plate 27 and come into contact with the surface of the lower clamping block 26 provided on the upper baffle plate 25, thereby blocking the floating flocs;

[0080] It should be noted that the surfaces of the upper baffle plate 25, the lower clamping block 26, the lower baffle plate 27 and the upper clamping block 28 are all coated with a hydrophobic coating. The hydrophobic surface is not easily wetted by water. When the flocs approach this surface, the water will form water droplets on the surface of the object and roll off, rather than taking the flocs away. Specifically, on the surface of an object coated with a waterproof coating, the water droplets will form individual water droplets, and the flocs are more likely to adhere to the exposed part of the object surface. This is because the surface tension of water makes the water tend to shrink into water droplets, reducing the contact area with the object surface, thereby weakening the carrying effect on the flocs;

[0081] Therefore, the floating flocs will be blocked by the upper blocking plate 25 and the lower blocking plate 27, thereby preventing some flocs from floating up to the supernatant during the flocculation process and being discharged with the supernatant. The upper blocking plate 25 and the lower blocking plate 27 are set to prevent the flocs from floating up. The flocculation process requires the addition of flocculants to promote the formation of flocs by pollutants. If the flocs float up and are discharged with the supernatant, it means that the flocculants are also taken away. Avoiding this situation can make the flocculants play a more full role, reduce the amount of flocculants used, and thus reduce the treatment cost. In addition, when the flocs can effectively aggregate and settle instead of floating up and losing, the entire flocculation and sedimentation process can be completed faster, avoiding affecting the wastewater treatment efficiency. In addition, the purpose of the flocculation process is to remove pollutants in the water. If the flocs float up to the supernatant and are discharged, some pollutants will not be completely removed, thereby affecting the effluent water quality. Avoiding this situation can reduce the residual pollutants such as suspended matter, organic matter, and heavy metals in the water.

[0082] With the completion of the electroplating wastewater flocculation process, the staff can start the drive motor 22. Since the output shaft of the drive motor 22 is connected to the reciprocating screw 21 through a transmission belt, the rotation of the output shaft of the drive motor 22 will drive the reciprocating screw 21 to continuously rotate inside the wastewater treatment tank 11. At this time, the filter plate 24 threadedly connected to the surface of the reciprocating screw 21 will perform vertical reciprocating motion inside the wastewater treatment tank 11 under the continuous rotation of the reciprocating screw 21. During the movement of the filter plate 24, it is restricted by the guide rod 23 and can only move in the vertical direction.

[0083] In the above process, when the filter plate 24 moves downward on the surface of the guide rod 23, the limit spring 29 arranged between the filter plate 24 and the upper blocking plate 25 will be compressed first. At this time, the filter plate 24 will gradually approach the position of the upper blocking plate 25. Subsequently, the continued movement of the filter plate 24 will apply pressure to the upper blocking plate 25 through the limit spring 29 arranged between the filter plate 24 and the upper blocking plate 25, and promote the upper blocking plate 25 to move downward on the surface of the reciprocating screw rod 21 and the guide rod 23. During the downward movement of the upper blocking plate 25, the limit spring 29 arranged between the upper blocking plate 25 and the lower blocking plate 27 is simultaneously compressed. Finally, through the limit spring 29, the lower blocking plate 27 is forced to move downward synchronously under the joint action of the upper blocking plate 25 and the filter plate 24;

[0084] It should be noted that since the upper blocking plate 25 is penetrated with a hollow groove, the number and size of the upper clamping blocks 28 are adapted to the hollow groove, and the lower blocking plate 27 is penetrated with a through groove, and the number and size of the lower clamping blocks 26 are adapted to the through groove. Therefore, when the upper blocking plate 25 and the lower blocking plate 27 approach each other under the combined action of the reciprocating screw rod 21 and the filter plate 24, the upper clamping blocks 28 will be inserted into the hollow grooves opened on the upper blocking plate 25, and the lower clamping blocks 26 will be inserted into the through grooves opened on the lower blocking plate 27. And with the continuous pressing of the filter plate 24, the filter plate 24, the upper blocking plate 25 and the lower blocking plate 27 will gradually form a whole;

[0085] During the downward movement of the filter plate 24, since the connecting member 46 is fixedly connected to the top of the filter plate 24 and the connecting member 46 is slidably connected to the outer surface of the columnar guide rod 41, the connecting member 46 will move downward together with the filter plate 24. In addition, the tension springs 48 between the limiting block 43 and the filter plate 24 at both ends will move synchronously with the filter plate 24. When the tension spring 48 is stretched to the maximum limit, the downward movement of the filter plate 24 will cause the limiting block 43 to slide downward on the outer surface of the columnar guide rod 41 through the tension spring 48;

[0086] At the same time, the wedge block 44 fixedly connected to the inner surface of the limiting block 43 will be slidably connected to the spiral groove 42 opened on the outer surface of the columnar guide rod 41, and under the action of the spiral groove 42 and the wedge block 44, the limiting block 43 will rotate synchronously on the outer surface of the columnar guide rod 41 during the downward movement. With the rotation of the limiting block 43, the upper hemispherical vibration blocks 45 fixedly connected to the lower surface of the limiting block 43 at equal intervals in a circular array will rotate synchronously;

[0087] Since the upper hemispherical vibration blocks 45 and the lower hemispherical vibration blocks 47 are arranged alternately, and the upper hemispherical vibration blocks 45 are located on the movement tracks of the lower hemispherical vibration blocks 47, with the rotation of the upper hemispherical vibration blocks 45, the upper hemispherical vibration blocks 45 will continuously contact the lower hemispherical vibration blocks 47. Thus, the vibration is continuously generated between the limiting block 43 and the connecting member 46 through the upper hemispherical vibration blocks 45 and the lower hemispherical vibration blocks, and then the vibration is transmitted to the surface of the filter plate 24 fixedly connected to the connecting member 46, causing the filter plate 24 to vibrate and preventing the filter plate 24 from being blocked;

[0088] By setting the continuously vibrating upper hemispherical vibration block 45 and the lower hemispherical vibration block 47, the filter plate 24 can be continuously vibrated. During the flocculation process, some flocs may adhere to the filter plate 24. The vibration of the filter plate 24 can make these flocs fall off more easily and re-enter the liquid to participate in the subsequent treatment process. As the flocs continuously fall off, the performance of the filter plate 24 can be maintained stable. If the flocs continuously accumulate on the filter plate 24, it will lead to an increase in the filtration resistance and a deterioration of the filtration effect. However, the vibration prompts the flocs to fall off in a timely manner, enabling the filter plate 24 to always maintain good filtration performance;

[0089] In addition, when the upper baffle plate 25 and the lower baffle plate 27 are clamped together as a whole through the lower clamping block 26 and the upper clamping block 28, at this time, the filter plate 24 will also be in contact with the surface of the upper baffle plate 25. Therefore, during the vibration of the filter plate 24, the vibration of the filter plate 24 will be synchronously transmitted to the upper baffle plate 25 and the lower baffle plate 27, thereby vibrating the flocs floating on the surface of the lower baffle plate 27 during the flocculation and precipitation process of the electroplating wastewater, so that the blocked flocs are separated from the surface of the lower baffle plate 27, thus avoiding the gradual accumulation of the floating flocs on the surface of the lower baffle plate 27 and affecting the use of the lower baffle plate 27, and further extending the service life of the lower baffle plate 27;

[0090] It should be noted that during the process of the upper baffle plate 25 and the lower baffle plate 27 approaching each other, the connecting rod 33 rotatably connected to the bottom end of the upper baffle plate 25 will move accordingly, and as the distance between the upper baffle plate 25 and the lower baffle plate 27 shortens, the connecting rod 33 will rotate with its connection point with the upper baffle plate 25 as the fulcrum, and the rotation direction is towards the direction of the connecting spring 35 (specific reference Figure 5 ), during the movement of the connecting rod 33, the slider 32 rotatably connected to its bottom end will slide inside the chute 31 opened on the lower baffle plate 27. During this process, the connecting spring 35 arranged between the chute wall of the chute 31 and the slider 32 will change from the stretched state to the normal state (that is, the state of not being affected by external forces and contracting or stretching);

[0091] During the movement of the slider 32, the gap cleaning member 34 fixedly connected to it will slide on the surface of the lower baffle plate 27 (specific reference Figure 5 , the moving direction is from the center of the lower baffle plate 27 towards both sides). Since the gap cleaning member 34 is adapted to the through groove opened on the lower baffle plate 27, the movement of the gap cleaning member 34 will clean the through groove synchronously. Therefore, during the process of cleaning the outer surfaces of the lower baffle plate 27 and the upper clamping block 28, the groove wall of the through groove penetratingly opened on the lower baffle plate 27 will be cleaned. In addition, since the connecting rod 33, the slider 32, and the gap cleaning member 34 are all centrally symmetrically arranged with reference to the center of the lower baffle plate 27, the two gap cleaning members 34 will move synchronously in the direction away from the center of the lower baffle plate 27 to clean the surfaces of the lower baffle plate 27 and the upper clamping block 28;

[0092] It should be noted that the lower surfaces of both sides of the upper baffle 25 are provided with card slots whose sizes are adapted to the gap cleaning member 34. Therefore, when the gap cleaning member 34 moves to the edge of the lower baffle 27, the upper baffle 25 and the lower baffle 27 will be in a tightly engaged state. The originally inclined connecting rod 33 will be in a horizontal state with the surface of the lower baffle 27. The gap cleaning member 34 can be inserted into the card slot opened on the bottom surface of the upper baffle 25 to prevent the gap cleaning member 34 from affecting the engagement between the upper baffle 25 and the lower baffle 27;

[0093] Through the arrangement of the gap cleaning member 34, the floating flocs deposited on the outer surfaces of the lower baffle 27 and the upper clamping block 28 can be cleaned, preventing the deposition of flocs from affecting the blocking effect of the lower baffle 27 on the floating flocs. In addition, the gap cleaning member 34 can synchronously clean the through grooves opened on the lower baffle 27, preventing the deposition of flocs inside the lower baffle 27 and affecting the engagement state formed by the lower baffle 27 and the upper baffle 25 through the upper clamping block 28 and the lower clamping block 26, ensuring the tight fit between the upper baffle 25 and the lower baffle 27;

[0094] As the lower baffle 27 moves downward under the combined action of the upper baffle 25 and the filter plate 24, the first rack 51 fixedly connected to the lower surface of the lower baffle 27 will move downward synchronously. Since the first rack 51 meshes with the gear 53, the gear 53 is rotatably connected inside the positioning block 52, the positioning block 52 is fixedly connected to the outer surface of the columnar guide rod 41, the second rack 54 meshes with the gear 53, and the first rack 51 and the second rack 54 are symmetrically arranged with the gear 53 as the center. Therefore, the downward movement of the first rack 51 will drive the gear 53 to rotate on the positioning block 52, and then drive the second rack 54 to move vertically upward, thereby driving the positioning plate 61 fixedly connected to the bottom end of the second rack 54 to move vertically upward synchronously;

[0095] The positioning plate 61 moves upward on the outer surface of the columnar guide rod 41 under the action of the second rack 54, and then drives the scraper 63 slidably connected to the positioning plate 61 through the limiting groove 62 to move upward synchronously. It should be noted that the side of the scraper 63 away from the positioning plate 61 is set as an inclined plane, and the inclined plane fits the inner wall of the sedimentation tank 16. The fixed spring 64 is set in a compressed state in the initial state. Therefore, as the scraper 63 moves upward and the distance between the inner walls of the sedimentation tank 16 increases, the originally compressed compression spring will stretch accordingly, forcing the scraper 63 to always fit the surface of the inner wall of the sedimentation tank 16 during the upward movement;

[0096] During the above process, the plane formed by the scraper 63 and the positioning plate 61 will gradually approach the plane formed by the upper baffle 25, the lower baffle 27 and the filter plate 24. The cooperation of the two planes will compress the flocs deposited between them, and then squeeze the water contained in the flocs, reducing the water content inside the deposited flocs;

[0097] Through the settings of the scraper 63, the positioning plate 61, the upper blocking plate 25, the lower blocking plate 27, and the filter plate 24, the water doped inside the deposited flocs can be squeezed, and reducing the water content of the flocs can significantly reduce the volume of the sludge. During the wastewater treatment process, reducing the water content of the flocs can make the flocs settle to the bottom of the water faster. According to Stokes' law, the sedimentation velocity of particles is proportional to the square of their radius and inversely proportional to the viscosity of the liquid. When the water content of the flocs decreases, its effective radius relatively increases and its density relatively increases, thus accelerating the sedimentation velocity;

[0098] Through the setting that the scraper 63 always fits the inner wall of the sedimentation tank 16, the scraper 63 can clean the sludge attached to the surface of the sedimentation tank 16, thereby reducing the sludge accumulation on the surface of the sedimentation tank 16. The sludge accumulation will change the flow direction and velocity of the water flow, resulting in short circuit flow. The so-called short circuit flow means that part of the sewage flows out through the sedimentation tank 16 without sufficient sedimentation time. The scraper 63 cleaning the sludge can avoid the occurrence of short circuit flow phenomenon, making the sewage have a more uniform flow state and residence time in the sedimentation tank 16;

[0099] As the filter plate 24 moves to the bottom end of the guide rod 23 under the action of the reciprocating lead screw 21, as the reciprocating lead screw 21 continues to rotate, the filter plate 24 will move from the bottom end of the guide rod 23 towards the top end of the guide rod 23 under the action of the reciprocating lead screw 21 and cycle. As the filter plate 24 moves upward, the structures mentioned in the above movement process will move in the reverse direction according to the above description and return to the initial state.

[0100] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0101] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flocculation sedimentation electroplating wastewater recovery device, comprising a wastewater treatment tank body (11), a partition plate (12) is fixedly installed at the top of the inner wall of the wastewater treatment tank body (11), evacuation valves (13) are detachably installed at equal intervals inside the partition plate (12), a stirring paddle (14) is rotatably connected inside the wastewater treatment tank body (11), one end of the stirring paddle (14) penetrates and extends to the outside of the wastewater treatment tank body (11), and the end of the stirring paddle (14) penetrating outside the wastewater treatment tank body (11) is fixedly connected to the output shaft of an external motor. A flocculant delivery pipeline (15) is fixedly installed through the outer wall of the wastewater treatment tank body (11), and a sedimentation tank (16) is fixedly installed at the bottom of the inner wall of the wastewater treatment tank body (11), characterized in that: It also includes a blocking component arranged inside the wastewater treatment tank (11); The blocking assembly comprises a reciprocating screw (21) symmetrically rotatably connected to the interior of a wastewater treatment tank (11); the top end of the reciprocating screw (21) is connected to a drive motor (22) via a transmission belt; a guide rod (23) is symmetrically fixedly connected to the inner wall of the wastewater treatment tank (11) on a side away from the reciprocating screw (21); a filter plate (24) is slidably connected to the outer surface of the guide rod (23); an upper blocking plate (25) is slidably connected to the outer surfaces of the reciprocating screw (21) and the guide rod (23); a lower block (26) is equidistantly fixedly connected to the lower surface of the upper blocking plate (25); and the outer surfaces of the reciprocating screw (21) and the guide rod (23) are symmetrically fixedly connected to the inner wall of the wastewater treatment tank (11) on a side away from the reciprocating screw (21). A lower blocking plate (27) is slidably connected thereto, an upper clamping block (28) is equidistantly fixedly connected to the upper surface of the lower blocking plate (27), a limit spring (29) is sleeved on the outer surfaces of the reciprocating screw rod (21) and the guide rod (23), the filter plate (24), the upper blocking plate (25) and the lower blocking plate (27) are vertically arranged on the outer surfaces of the reciprocating screw rod (21) and the guide rod (23) from top to bottom, a hollow groove is formed through the upper blocking plate (25), the number and size of the upper clamping blocks (28) are adapted to the hollow groove, a through groove is formed through the lower blocking plate (27), the number and size of the lower clamping blocks (26) are adapted to the through groove; Also included is a cleaning assembly disposed on the lower blocking plate (27); The cleaning assembly comprises a slide groove (31) symmetrically opened on the upper surface of both sides of the lower blocking plate (27), the slide groove (31) is slidably connected to a slider (32), the slider (32) is rotatably connected to a connecting rod (33), the connecting rod (33) is rotatably connected to the bottom surface of the upper blocking plate (25) at one end away from the slider (32), the side wall of the slider (32) is fixedly connected to a gap cleaning piece (34), the gap cleaning piece (34) is slidably connected to the outer surface of the upper clamping block (28), the slide groove (31) is fixedly connected to a connecting spring (35), the connecting spring (35) is fixedly connected to the side of the slider (32) at one end away from the groove wall of the slide groove (31), and the two connecting rods (33) are centrally symmetrically arranged with the center point of the lower blocking plate (27) as a reference.

2. The electroplating wastewater recovery device for flocculation precipitation according to claim 1, characterized in that: The side wall of the sedimentation tank (16) is arranged to be inclined, and the flocculant delivery pipeline (15) is fixedly connected to the output end of the external flocculant storage device.

3. The electroplating wastewater recovery device for flocculation precipitation according to claim 1, wherein: The driving motor (22) is fixedly connected to the outer wall of the wastewater treatment tank (11); the filter plate (24) is internally threadedly connected to the outer surface of the reciprocating screw (21) at a side away from the guide rod (23); a limit spring (29) is arranged at upper and lower sides of the upper blocking plate (25); and the end of the limit spring (29) away from the upper blocking plate (25) respectively contacts the bottom surface of the filter plate (24) and the top surface of the lower blocking plate (27).

4. A flocculation sedimentation electroplating wastewater recovery device according to claim 1, characterized in that: It also includes a positioning plate (61) vibration component arranged inside the wastewater treatment tank (11); The vibration assembly includes a columnar guide rod (41) fixedly connected to the center of the bottom surface of the partition plate (12). A spiral groove (42) is formed on the outer surface of the top of the columnar guide rod (41). A limiting block (43) is slidably connected to the outer surface of the top end of the columnar guide rod (41). A wedge block (44) is fixedly connected to the inner wall of the limiting block (43). Upper hemispherical vibration blocks (45) are fixedly connected to the outer surface of the bottom of the limiting block (43) at equal intervals in a circular array. A connecting member (46) is slidably connected to the outer surface of the columnar guide rod (41). Lower hemispherical vibration blocks (47) are fixedly connected to the outer surface of the top of the connecting member (46) at equal intervals in a circular array. A pulling spring (48) is fixedly connected to the outer surface of the limiting block (43).

5. A flocculation sedimentation electroplating wastewater recovery device according to claim 4, characterized in that: The columnar guide rod (41) penetrates through the filter plate (24), the upper blocking plate (25) and the lower blocking plate (27) and extends to the bottom of the inner wall of the wastewater treatment tank body (11). One end of the wedge block (44) away from the limiting block (43) is slidably connected to the inside of the spiral groove (42). The bottom outer surface of the connecting member (46) is fixedly connected to the filter plate (24). The connecting member (46) is slidably connected to the inside of the limiting block (43). The upper hemispherical vibration blocks (45) and the lower hemispherical vibration blocks (47) arranged in a circular array are arranged in an interleaved manner. The lower hemispherical vibration blocks (47) are located on the movement tracks of the upper hemispherical vibration blocks (45).

6. The electroplating wastewater recovery device for flocculation precipitation according to claim 4, characterized in that: It further includes a connection assembly arranged below the lower blocking plate (27); The connection assembly includes a first rack (51) symmetrically and fixedly connected to the lower surface of the lower blocking plate (27). A positioning block (52) is fixedly connected to the outer surface of one end of the columnar guide rod (41) penetrating through the lower blocking plate (27). Gears (53) are symmetrically and rotatably connected to the inside of the positioning block (52). Second racks (54) are engaged with the sides of the gears (53).

7. An electroplating wastewater recovery device for flocculation precipitation according to claim 6, characterized in that: The first rack (51) and the second racks (54) are both vertically slidably connected to the inner wall of the sedimentation tank (16). The first rack (51) and the second racks (54) are arranged in central symmetry with the center point of the gear (53) as the reference.

8. The electroplating wastewater recovery device for flocculation precipitation according to claim 6, characterized in that: It further includes a scraping assembly arranged inside the sedimentation tank (16); The scraping assembly includes a positioning plate (61) fixedly connected to the bottom end of the second rack (54). Limiting grooves (62) are formed inside both sides of the positioning plate (61). Scrapers (63) are slidably connected to the inside of the limiting grooves (62). Fixed springs (64) are fixedly connected to the inside of the scrapers (63) at equal intervals.

9. The electroplating wastewater recovery device for flocculation precipitation according to claim 8, characterized in that: The positioning plate (61) is slidably connected to the outer wall of the bottom end of the columnar guide rod (41). One side of the scraper (63) away from the positioning plate (61) abuts against the side wall of the sedimentation tank (16). One end of the fixed spring (64) away from the scraper (63) is fixedly connected to the groove wall of the limiting groove (62).

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