Electroplating wastewater recovery device for flocculent precipitation

Abstract

The invention discloses a flocculent precipitation electroplating wastewater recovery device, which relates to the technical field of wastewater treatment, and comprises a wastewater treatment tank body, through the arrangement of the upper blocking plate and the lower blocking plate, floc floating is avoided, a flocculating agent needs to be added in the flocculation process to promote pollutants to form floc, if the floc floats and is discharged along with supernate, the flocculating agent is taken away along with the floc, the flocculating agent can fully play a role, the dosage of the flocculating agent is reduced, and the cost is reduced. In addition, when the floc can be effectively gathered and settled instead of floating and losing, the whole flocculation and sedimentation process can be completed more quickly, the influence on the wastewater treatment efficiency is avoided, in addition, the flocculation process aims at removing pollutants in water, and if the floc floats into supernate and is discharged, the wastewater treatment efficiency is improved. And part of pollutants cannot be thoroughly removed, so that the effluent quality is influenced, and residues of pollutants such as suspended matters, organic matters and heavy metals in water can be reduced.

Description

Technical Field

[0001] The invention relates to the technical field of wastewater treatment, in particular to a flocculation and sedimentation electroplating wastewater recovery device. Background Art

[0002] The sources of electroplating wastewater are generally: (1) water for washing plated parts; (2) waste electroplating solution; (3) other wastewater, including water from washing workshop floors, water from washing plates, condensed water from ventilation equipment, and various tank liquids and drainage caused by leakage of plating tanks or improper operation and management; (4) equipment cooling water, which is not polluted except for the increase in temperature during use; Flocculation sedimentation is a commonly used physical method for treating electroplating wastewater. By adding flocculants to the electroplating wastewater, the fine suspended particles in the electroplating wastewater can be aggregated to form larger flocculent sludge. The electroplating wastewater is then allowed to stand to allow the sludge to settle to the bottom, while the clear liquid can be discharged from above. However, in the actual implementation process, the flocculation precipitation generated in the sedimentation tank is affected by many 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, the formed flocs will be redispersed, and the high concentration of 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 they are easily affected by external factors and float up. Heavy metal ions and harmful chemicals in electroplating wastewater need to be removed through flocculation and sedimentation processes. The floccules float up, causing these pollutants to return to the water, resulting in excessive effluent quality. The floating floccules are discharged with the clear liquid and will gradually decompose in the natural environment, releasing the heavy metal ions and harmful substances contained in them. These substances will re-enter the water body and soil, causing secondary pollution to the surrounding environment. To this end, we propose a flocculation and sedimentation electroplating wastewater recovery device to solve the above problems. Summary of the invention

[0003] Technical issues solved In view of this, and in view of the deficiencies in the prior art, the present invention provides a flocculation and sedimentation electroplating wastewater recovery device to solve the problems raised in the above background technology.

[0004] Technical Solution 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; 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.

[0005] 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.

[0006] 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 opened through the upper blocking plate, the number and size of the upper clamping blocks are adapted to the hollow groove, a through groove is opened through the lower blocking plate, the number and size of the lower clamping blocks are adapted to the through groove, the upper clamping block is arranged on the upper and lower sides of the upper blocking plate, and the end of the upper clamping block away from the upper blocking plate respectively conflicts with the bottom surface of the filter plate and the top surface of the lower blocking plate.

[0007] Preferably, it also includes a cleaning assembly disposed on the lower blocking plate; 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.

[0008] Preferably, it also includes a positioning plate vibration assembly disposed inside the wastewater treatment tank; The vibration assembly includes a columnar guide rod fixedly connected to the center of the bottom surface of the partition, a spiral groove is opened on the top outer surface of the columnar guide rod, the top outer surface of the columnar guide rod is slidably connected to a limit block, the inner wall of the limit block is fixedly connected to a wedge block, the bottom outer surface of the limit block is equidistantly fixedly connected to an upper hemispherical vibration block in a circular array, the outer surface of the columnar guide rod is slidably connected to a connecting piece, the top outer surface of the connecting piece is equidistantly fixedly connected to a lower hemispherical vibration block in a circular array, and the outer surface of the limit block is fixedly connected to a tension spring.

[0009] Preferably, the columnar guide rod passes through the filter plate, the upper baffle plate and the lower baffle plate and extends to the bottom of the inner wall of the wastewater treatment tank. The end of the wedge block away from the limit block is slidably connected to the inside of the spiral groove. The outer surface of the bottom end of the connecting piece is fixedly connected to the filter plate. The connecting piece is slidably connected to the inside of the limit block. The upper hemispherical vibration blocks and the lower hemispherical vibration blocks arranged in a circular array are staggered with each other, and the lower hemispherical vibration block is located on the movement trajectory of the upper hemispherical vibration block.

[0010] Preferably, it also includes a connecting assembly disposed below the lower blocking plate; The connecting component includes a gear rod 1 which is symmetrically fixedly connected to the lower surface of the lower blocking plate, a columnar guide rod passes through the outer surface of one end of the lower blocking plate and is fixedly connected to a positioning block, a gear is symmetrically rotated inside the positioning block, and gear rods 2 are meshed on the sides of the gears.

[0011] Preferably, gear rod 1 and gear rod 2 are both vertically slidably connected to the inner wall of the sedimentation tank, and gear rod 1 and gear rod 2 are centrally symmetrically arranged with reference to the center point of the gear.

[0012] Preferably, it also includes a scraping assembly disposed inside the sedimentation tank; The scraping assembly includes a positioning plate fixedly connected to the two bottom ends of the gear rod, and limiting grooves are provided inside the two sides of the positioning plate. Scrapers are slidably connected inside the limiting grooves, and fixed springs are equidistantly fixed inside the scrapers.

[0013] Preferably, the positioning plate is slidably connected to the outer wall of the bottom end of the columnar guide rod, the scraper plate is in contact with the side wall of the sedimentation tank away from the positioning plate, and the fixed spring is fixedly connected to the wall of the limiting groove at one end away from the scraper plate.

[0014] Beneficial Effects Compared with the prior art, the present invention provides a flocculation and sedimentation electroplating wastewater recovery device, which has the following beneficial effects: The upper and lower baffles are set to prevent 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, 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 suspended matter, organic matter, heavy metals and other pollutants in the water. By setting the upper hemispherical vibration block and the lower hemispherical vibration block which are constantly vibrating, the filter plate can be kept vibrating. During the flocculation process, some floccules may adhere to the filter plate. The vibration of the filter plate can make these floccules fall off more easily and re-enter the liquid to participate in the subsequent treatment process. With the continuous shedding of floccules, the performance of the filter plate can be kept stable. If the floccules are constantly accumulated on the filter plate, the filtration resistance will increase and the filtration effect will deteriorate. The vibration prompts the floccules to fall off in time, so that the filter plate can always maintain good filtration performance. Through the vibration of the filter plate, when the upper blocking plate and the lower blocking plate are clamped into a whole through the lower clamping block and the upper clamping block, the filter plate will also fit with the surface of the upper blocking plate. Therefore, during the vibration of the filter plate, the vibration of the filter plate will be synchronously transmitted to the upper blocking plate and the lower blocking plate, thereby vibrating the flocs that float to the surface of the lower blocking plate during the flocculation and sedimentation of the electroplating wastewater, so that the blocked flocs are separated from the surface of the lower blocking plate, thereby preventing the floating flocs from gradually accumulating on the surface of the lower blocking plate, affecting the use of the lower blocking plate, and thus extending the service life of the lower blocking plate; By setting the gap cleaning piece, the floating flocs deposited on the outer surface of the lower blocking plate and the upper clamping block can be cleaned to prevent the flocs from depositing and affecting the blocking effect of the lower blocking plate on the floating flocs. In addition, the gap cleaning piece can simultaneously clean the through grooves opened on the lower blocking plate to prevent the flocs from depositing inside the lower blocking plate and affecting the clamping state of the lower blocking plate and the upper blocking plate formed by the upper clamping block and the lower clamping block, thereby ensuring the close fit between the upper blocking plate and the lower blocking plate. The scraper, positioning plate, upper baffle, lower baffle and filter plate can squeeze out the water mixed inside the deposited flocs. Reducing the water content of the flocs can significantly reduce the volume of the sludge. In 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 speed of the particles is proportional to the square of its radius and inversely proportional to the viscosity of the liquid. When the water content of the flocs decreases, its effective radius increases relatively and the density increases relatively, thereby accelerating the sedimentation speed; By setting the scraper to always fit 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 flow rate of the water and cause short flow. The so-called short 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 flow and make the sewage have a more uniform flow state and residence time in the sedimentation tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall appearance structure of the present invention; Figure 2 It is a schematic diagram of the internal cross-sectional structure of the wastewater treatment tank of the present invention; Figure 3 This is a schematic diagram of the position relationship of the filter plate of the present invention; Figure 4 It is a schematic diagram of the position relationship of the connecting parts of the present invention; Figure 5 This is a schematic diagram of the position relationship of the lower blocking plate of the present invention; Figure 6 It is a schematic diagram of the cross-sectional structure of the limit block and the connecting piece of the present invention; Figure 7 This is a schematic diagram of the connection relationship between the two parts of the gear rod of the present invention; Figure 8 For the present invention Figure 7 A schematic diagram of the structure enlargement in the middle; Fig. 9 It is a schematic diagram of the internal cross-sectional structure of the positioning plate of the present invention.

[0016] In the figure: 11, wastewater treatment tank; 12, partition; 13, drain valve; 14, stirring paddle; 15, flocculant delivery pipeline; 16, sedimentation tank; 21. reciprocating screw rod; 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. ​​limit spring; 31. Slide groove; 32. Sliding block; 33. Connecting rod; 34. Gap cleaning member; 35. Connecting spring; 41. Columnar guide rod; 42. Spiral groove; 43. Limit block; 44. Wedge block; 45. Upper hemispherical vibration block; 46. Connector; 47. Lower hemispherical vibration block; 48. Tension spring; 51. Gear rod 1; 52. Positioning block; 53. Gear; 54. Gear rod 2; 61. Positioning plate; 62. Limiting groove; 63. Scraper; 64. Fixing spring. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] Embodiments of the present invention See also Figures 1 to 7 , a flocculation and sedimentation electroplating wastewater recovery device, comprising a wastewater treatment tank 11, a partition 12 is fixedly installed on the top of the inner wall of the wastewater treatment tank 11, an emptying valve 13 is equidistantly and detachably installed inside the partition 12, a stirring paddle 14 is rotatably connected inside the wastewater treatment tank 11, one end of the stirring paddle 14 penetrates and extends to the outside of the wastewater treatment tank 11, and the end of the stirring paddle 14 that penetrates the outside of the wastewater treatment tank 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 11, a sedimentation tank 16 is fixedly installed at the bottom of the inner wall of the wastewater treatment tank 11, and also includes a blocking component arranged inside the wastewater treatment tank 11; The blocking assembly includes a reciprocating screw 21 which is symmetrically rotatably connected to the inside of the wastewater treatment tank body 11. The top of the reciprocating screw 21 is connected to a drive motor 22 through a transmission belt. A guide rod 23 is symmetrically fixedly connected to the side of the inner wall of the wastewater treatment tank body 11 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 blocking block 26 is equidistantly fixedly connected to the lower surface of the upper blocking plate 25. A lower blocking plate 27 is slidably connected to the outer surfaces of the reciprocating screw 21 and the guide rod 23. An upper blocking block 28 is equidistantly fixedly connected to the upper surface of the lower blocking plate 27. A limiting spring 29 is sleeved on the outer surfaces of the reciprocating screw 21 and the guide rod 23.

[0019] The side wall of the sedimentation tank 16 is inclined, and the flocculant delivery pipeline 15 is fixedly connected to the output end of the external flocculant storage device.

[0020] Among them, the driving motor 22 is fixedly connected to the outer wall of the wastewater treatment tank body 11, the filter plate 24 is connected to the outer surface of the reciprocating screw 21 by an internal thread on the side away from the guide rod 23, the filter plate 24, the upper blocking plate 25 and the lower blocking plate 27 are arranged on the outer surfaces of the reciprocating screw 21 and the guide rod 23 in a vertical direction from top to bottom, 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, the lower blocking plate 27 is penetrated with a through groove, the number and size of the lower clamping blocks 26 are adapted to the through groove, the upper clamping blocks 28 are arranged on the upper and lower sides of the upper blocking plate 25, and the end of the upper clamping block 28 away from the upper blocking plate 25 respectively conflicts with the bottom surface of the filter plate 24 and the top surface of the lower blocking plate 27.

[0021] The surfaces of the upper blocking plate 25, the lower blocking block 26, the lower blocking plate 27 and the upper blocking block 28 are all coated with a hydrophobic coating.

[0022] Among them, the lower surfaces of both sides of the upper blocking plate 25 are provided with card slots whose sizes are matched with the gap cleaning piece 34.

[0023] Further Embodiments See also Figure 3 and Figure 5 , the electroplating wastewater recovery device for flocculation and sedimentation also includes a cleaning component arranged on the lower blocking plate 27; The cleaning assembly includes a slide groove 31 symmetrically opened on the upper surface of both sides of the lower blocking plate 27, and a slider 32 is slidably connected inside the slide groove 31, and a connecting rod 33 is rotatably connected inside the slider 32. 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, and a gap cleaning piece 34 is fixedly connected to the side wall of the slider 32. The gap cleaning piece 34 is slidably connected to the outer surface of the upper clamping block 28. A connecting spring 35 is fixedly connected inside the slide groove 31, and the connecting spring 35 is fixedly connected to the side surface of the slider 32 at one end away from the groove wall of the slide groove 31. The two connecting rods 33 are centrally symmetrically arranged with the center point of the lower blocking plate 27 as a reference.

[0024] The initial state of the connecting spring 35 is set to a stretched state.

[0025] Further Embodiments See also Figures 3 to 7 and Fig. 9 , the electroplating wastewater recovery device for flocculation and sedimentation 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 12, a spiral groove 42 is opened on the top outer surface of the columnar guide rod 41, a limit block 43 is slidably connected to the top outer surface of the columnar guide rod 41, a wedge block 44 is fixedly connected to the inner wall of the limit block 43, the bottom outer surface of the limit block 43 is equidistantly fixedly connected to the upper hemispherical vibration block 45 in a circular array, the outer surface of the columnar guide rod 41 is slidably connected, the top outer surface of the connection member 46 is equidistantly fixedly connected to the lower hemispherical vibration block 47 in a circular array, and the outer surface of the limit block 43 is fixedly connected to a tension spring 48.

[0026] Among them, the columnar guide rod 41 passes through the filter plate 24, the upper baffle plate 25 and the lower baffle plate 27 and extends to the bottom of the inner wall of the wastewater treatment tank 11. The wedge block 44 is slidably connected to the inside of the spiral groove 42 at one end away from the limit block 43. The outer surface of the bottom end of the connecting member 46 is fixedly connected to the filter plate 24, and the connecting member 46 is slidably connected to the inside of the limit block 43. The upper hemispherical vibration blocks 45 and the lower hemispherical vibration blocks 47 arranged in a circular array are staggered with each other, and the lower hemispherical vibration block 47 is located on the movement trajectory of the upper hemispherical vibration block 45.

[0027] One end of the pulling spring 48 away from the limiting block 43 is fixedly connected to the upper surface of the filter plate 24 .

[0028] Further Embodiments See also Figure 5 , Figure 7 and Figure 8 , the electroplating wastewater recovery device for flocculation and sedimentation also includes a connecting assembly arranged below the lower baffle plate 27; The connecting assembly includes a gear rod 51 symmetrically fixedly connected to the lower surface of the lower blocking plate 27, a columnar guide rod 41 passes through the lower blocking plate 27 and is fixedly connected to the outer surface of one end thereof with a positioning block 52, a gear 53 is symmetrically rotatably connected inside the positioning block 52, and gear rods 54 are meshed on the sides of the gears 53.

[0029] The gear rod 1 51 meshes with the gear 53 , and the gear rod 1 51 and the gear rod 2 54 are both vertically slidably connected to the inner wall of the sedimentation tank 16 , and the gear rod 1 51 and the gear rod 2 54 are centrally symmetrically arranged with the center point of the gear 53 as a reference.

[0030] Further Embodiments See also Figure 7 and Fig. 9 , the electroplating wastewater recovery device for flocculation and sedimentation also includes a scraping component arranged inside the sedimentation tank 16; The scraping assembly includes a positioning plate 61 fixedly connected to the bottom end of the second gear rod 54, and limiting grooves 62 are provided inside the two sides of the positioning plate 61. Scrapers 63 are slidably connected inside the limiting grooves 62, and fixed springs 64 are equidistantly fixed inside the scrapers 63.

[0031] The positioning plate 61 is slidably connected to the outer wall of the bottom end of the columnar guide rod 41 , the scraper 63 is in contact with the side wall of the sedimentation tank 16 away from the positioning plate 61 , and the fixed spring 64 is fixedly connected to the wall of the limiting groove 62 at one end away from the scraper 63 .

[0032] The side of the scraper 63 away from the positioning plate 61 is set as an inclined plane, and the inclined plane is in contact with the inner wall of the sedimentation tank 16, and the initial state of the fixing spring 64 is set to a compressed state.

[0033] The working process and principle of the overall content of the above embodiment are as follows: The staff injects the electroplating wastewater after preliminary treatment through the top of the wastewater treatment tank 11, and then starts the external motor. Since the output shaft end of the external motor is fixedly connected to the stirring paddle 14 that passes through one end of the wastewater treatment tank 11, the start of the external motor will cause the stirring paddle 14 to rotate inside the wastewater treatment tank 11 to stir the electroplating wastewater and assist in fully mixing the 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 located above the partition 12 contacts the filter plate 24 and is filtered through the filter plate 24. It should be noted that the opening and closing of the drain valve 13 can be controlled by an existing electronic control device, so no further explanation will be given here; After the electroplating wastewater contacts 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 pass through the upper blocking plate 25 and the lower blocking plate 27 in turn, and finally enter the sedimentation tank 16. Then, the staff transports the flocculant in the external flocculant storage device to the wastewater treatment tank 11 through the flocculant delivery pipe 15, so that the fine suspended particles in the electroplating wastewater are aggregated 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 sediment. The staff can discharge the supernatant from the top of the wastewater treatment tank 11. In the above process, when the flocculant forms floc sludge precipitation inside the electroplating wastewater, due to the large amount of dissolved gas or gas generated in the water (for example, 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 be redispersed, and finally causing the flocs to float, so that part of the flocs exist in the supernatant and are discharged with the supernatant, causing environmental pollution; Therefore, during the flocculation process, the floating flocs will pass through the lower blocking plate 27, the upper blocking plate 25 and the filter plate 24, wherein most of the floating flocs will first contact with the lower blocking plate 27 and adhere to the lower surface of the lower blocking plate 27, and then a small amount of flocs will pass through the through grooves formed on the lower blocking plate 27 and contact with the surface of the lower block 26 provided on the upper blocking plate 25, thereby blocking the floating flocs. It should be noted that the surfaces of the upper blocking plate 25, the lower blocking block 26, the lower blocking plate 27 and the upper blocking block 28 are all coated with a hydrophobic coating. The hydrophobic surface is not easily wetted by water. When the flocs approach such a surface, water will form water droplets on the surface of the object and roll down instead of carrying the flocs away. Specifically, on the surface of an object coated with a waterproof coating, water droplets will form independent water droplets, and the flocs are more likely to adhere to the exposed part of the surface of the object. This is because the surface tension of water makes water tend to shrink into water droplets, reducing the contact area with the surface of the object, thereby weakening the carrying effect on the flocs; 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. 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. 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; It should be noted that, since the upper blocking plate 25 is provided 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 provided with a through groove, the number and size of the lower clamping blocks 26 are adapted to the through groove, so when the upper blocking plate 25 and the lower blocking plate 27 are close to each other under the joint action of the reciprocating screw 21 and the filter plate 24, the upper clamping block 28 will be inserted into the hollow groove provided on the upper blocking plate 25, and the lower clamping block 26 will be inserted into the through groove provided on the lower blocking plate 27, and as the filter plate 24 continues to apply pressure, the filter plate 24, the upper blocking plate 25 and the lower blocking plate 27 will gradually form a whole; During the downward movement of the filter plate 24, since the top of the filter plate 24 is fixedly connected with a connecting piece 46, and the connecting piece 46 is slidably connected to the outer surface of the columnar guide rod 41, the connecting piece 46 will move downward together with the filter plate 24. In addition, the pulling spring 48 between the limit block 43 and the filter plate 24 at both ends will move synchronously with the filter plate 24. When the pulling spring 48 is stretched to the maximum limit, the downward movement of the filter plate 24 will cause the limit block 43 to slide downward on the outer surface of the columnar guide rod 41 through the pulling spring 48. At the same time, the wedge block 44 fixedly connected to the inner surface of the limit block 43 will be synchronously 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 limit block 43 is synchronously rotated on the outer surface of the columnar guide rod 41 during the downward movement. As the limit block 43 rotates, the upper hemispherical vibration block 45 equidistantly fixedly connected to the lower surface of the limit block 43 in a circular array will rotate synchronously; Since the upper hemispherical vibration block 45 and the lower hemispherical vibration block 47 are arranged alternately, and the upper hemispherical vibration block 45 is located on the motion trajectory of the lower hemispherical vibration block 47, as the upper hemispherical vibration block 45 rotates, the upper hemispherical vibration block 45 will continuously contact the lower hemispherical vibration block 47, so that the upper hemispherical vibration block 45 and the lower hemispherical vibration block cause the limit block 43 and the connecting member 46 to continuously vibrate, and then transmit the vibration to the surface of the filter plate 24 fixedly connected to the connecting member 46, so that the filter plate 24 vibrates to avoid clogging of the filter plate 24; By setting the upper hemispherical vibration block 45 and the lower hemispherical vibration block 47 which are constantly vibrating, the filter plate 24 can be made to vibrate continuously. During the flocculation process, some floccules may adhere to the filter plate 24. The vibration of the filter plate 24 can make these floccules fall off more easily and re-enter the liquid to participate in the subsequent treatment process. With the continuous shedding of floccules, the performance of the filter plate 24 can be kept stable. If floccules are continuously accumulated on the filter plate 24, the filtration resistance will increase and the filtration effect will deteriorate. The vibration prompts the floccules to fall off in time, so that the filter plate 24 can always maintain good filtration performance. In addition, when the upper blocking plate 25 and the lower blocking plate 27 are clamped into a whole through the lower clamping block 26 and the upper clamping block 28, the filter plate 24 will also fit with the surface of the upper blocking 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 blocking plate 25 and the lower blocking plate 27, thereby vibrating the flocs that float to the surface of the lower blocking plate 27 during the flocculation and sedimentation of the electroplating wastewater, so that the blocked flocs are separated from the surface of the lower blocking plate 27, thereby preventing the floating flocs from gradually accumulating on the surface of the lower blocking plate 27, affecting the use of the lower blocking plate 27, and thus extending the service life of the lower blocking plate 27; It should be noted that, in the process of the upper blocking plate 25 and the lower blocking plate 27 approaching each other, the connecting rod 33 connected to the bottom end of the upper blocking plate 25 will move accordingly, and as the distance between the upper blocking plate 25 and the lower blocking plate 27 is shortened, the connecting rod 33 will rotate with its connection point with the upper blocking plate 25 as a fulcrum, and the rotation direction is toward the direction of the connecting spring 35 (see Figure 5 ), during the movement of the connecting rod 33, the slider 32 connected to the bottom end thereof will be slidably connected to the inside of the slide groove 31 provided on the lower blocking plate 27. During this process, the connecting spring 35 provided between the groove wall of the slide groove 31 and the slider 32 will change from a stretched state to a normal state (i.e., a state of contraction or stretching that is not affected by external forces); During the movement of the slider 32, the gap cleaning member 34 fixedly connected thereto will be driven to slide on the surface of the lower blocking plate 27 (see Figure 5 , the moving direction is from the center of the lower blocking plate 27 to the two sides), since the gap cleaning member 34 is adapted to the through groove provided on the lower blocking plate 27, the movement of the gap cleaning member 34 will clean the through groove synchronously, so that in the process of cleaning the outer surface of the lower blocking plate 27 and the upper clamping block 28, the through groove wall provided through the lower blocking 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 blocking plate 27, the two gap cleaning members 34 will synchronously move in a direction away from the center of the lower blocking plate 27 to clean the surface of the lower blocking plate 27 and the upper clamping block 28; It should be noted that the lower surfaces of both sides of the upper blocking plate 25 are provided with slots whose sizes match the gap cleaning pieces 34. Therefore, when the gap cleaning pieces 34 move to the edge of the lower blocking plate 27, the upper blocking plate 25 and the lower blocking plate 27 will be in a tightly engaged state, and the connecting rod 33, which was originally in an inclined state, will be in a horizontal state with the surface of the lower blocking plate 27. The gap cleaning pieces 34 can be inserted into the slots provided on the bottom surface of the upper blocking plate 25, so as to prevent the gap cleaning pieces 34 from affecting the engagement of the upper blocking plate 25 and the lower blocking plate 27. By setting the gap cleaning member 34, the floating flocs deposited on the outer surfaces of the lower blocking plate 27 and the upper clamping block 28 can be cleaned to prevent the flocs from depositing and affecting the blocking effect of the lower blocking plate 27 on the floating flocs. In addition, the gap cleaning member 34 can simultaneously clean the through grooves provided on the lower blocking plate 27 to prevent the flocs from being deposited inside the lower blocking plate 27 and affecting the engagement state between the lower blocking plate 27 and the upper blocking plate 25 through the upper clamping block 28 and the lower clamping block 26, thereby ensuring the close fit between the upper blocking plate 25 and the lower blocking plate 27. As the lower blocking plate 27 moves downward under the joint action of the upper blocking plate 25 and the filter plate 24, the gear rod 1 51 fixedly connected to the lower surface of the lower blocking plate 27 will move downward synchronously. Since the gear rod 1 51 is meshed with the gear 53, the gear 53 is rotatably connected to the inside of the positioning block 52, the positioning block 52 is fixedly connected to the outer surface of the columnar guide rod 41, the gear rod 2 54 is meshed with the gear 53, and the gear rod 1 51 and the gear rod 2 54 are centrally symmetrically arranged with the gear 53 as the center. Therefore, the downward movement of the gear rod 1 51 will drive the gear 53 to rotate on the positioning block 52, and then drive the gear rod 2 54 to move upward in the vertical direction, thereby driving the positioning plate 61 fixedly connected to the bottom end of the gear rod 2 54 to move upward vertically synchronously; The positioning plate 61 moves upward on the outer surface of the columnar guide rod 41 under the action of the gear rod 2 54, thereby driving the scraper 63 slidably connected to the positioning plate 61 through the limit 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 is in contact with the inner wall of the sedimentation tank 16. The initial state of the fixed spring 64 is set to a compressed state. Therefore, as the scraper 63 moves upward and the distance between the inner walls of the sedimentation tank 16 increases, the compressed spring originally in a compressed state will stretch accordingly, forcing the scraper 63 to always be in contact with the inner wall surface of the sedimentation tank 16 during the upward movement. 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 blocking plate 25, the lower blocking plate 27 and the filter plate 24. The cooperation of the two planes will compress the flocs deposited between them, thereby squeezing out the water contained in the flocs and reducing the water content inside the deposited flocs. By setting the scraper 63, the positioning plate 61, the upper blocking plate 25, the lower blocking plate 27 and the filter plate 24, the water mixed in the deposited flocs can be squeezed out, and reducing the water content of the flocs can significantly reduce the volume of the sludge. In the process of wastewater treatment, 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 speed of the particles is proportional to the square of its radius and inversely proportional to the viscosity of the liquid. When the water content of the flocs decreases, its effective radius increases relatively, and the density increases relatively, thereby accelerating the sedimentation speed; By setting the scraper 63 to always fit 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 accumulation of sludge on the surface of the sedimentation tank 16. The accumulation of sludge will change the flow direction and flow rate of the water flow, resulting in short-flow. The so-called short-flow is that part of the sewage flows out of the sedimentation tank 16 without sufficient sedimentation time. The scraper 63 cleans the sludge to avoid the occurrence of the short-flow phenomenon, so that the sewage has a more uniform flow state and residence time in the sedimentation tank 16; As the filter plate 24 moves to the bottom end of the guide rod 23 under the action of the reciprocating screw 21, as the reciprocating screw 21 continues to rotate, the filter plate 24 will move from the bottom end of the guide rod 23 to the top end of the guide rod 23 under the action of the reciprocating screw 21, and reciprocate. As the filter plate 24 moves upward, the structure mentioned in the above movement process will move in the opposite direction according to the above description and return to the initial state.

[0034] It should be noted that, in this article, relational terms such as first and second, etc. 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 variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0035] Although 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 appended claims and their equivalents.

Claims

1. A flocculation and sedimentation electroplating wastewater recovery device, comprising a wastewater treatment tank (11), a partition (12) fixedly installed on the top of the inner wall of the wastewater treatment tank (11), an emptying valve (13) equidistantly and detachably installed inside the partition (12), a stirring paddle (14) rotatably connected inside the wastewater treatment tank (11), one end of the stirring paddle (14) passing through and extending to the outside of the wastewater treatment tank (11), and the end of the stirring paddle (14) passing through the outside of the wastewater treatment tank (11) is fixedly connected to the output shaft of an external motor, a flocculant delivery pipeline (15) passing through and fixedly installed on the outer wall of the wastewater treatment tank (11), and a sedimentation tank (16) fixedly installed on the bottom of the inner wall of the wastewater treatment tank (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 driving 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 clamping block (26) is equidistantly fixedly connected to the lower surface of the upper blocking plate (25); a lower blocking plate (27) is slidably connected to the outer surfaces of the reciprocating screw (21) and the guide rod (23); an upper clamping block (28) is equidistantly fixedly connected to the upper surface of the lower blocking plate (27); and a limit spring (29) is sleeved on the outer surfaces of the reciprocating screw (21) and the guide rod (23).

2. The electroplating wastewater recovery device of flocculation sedimentation according to claim 1 is characterized by: 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 of flocculation sedimentation according to claim 1 is characterized by: The driving motor (22) is fixedly connected to the outer wall of the wastewater treatment tank (11); the filter plate (24) is connected to the outer surface of the reciprocating screw (21) by internal threads on the side away from the guide rod (23); the filter plate (24), the upper blocking plate (25) and the lower blocking plate (27) are arranged on the outer surfaces of the reciprocating screw (21) and the guide rod (23) in a vertical direction 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 both compatible with 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 both compatible with the through groove; the upper clamping blocks (28) are arranged on the upper and lower sides of the upper blocking plate (25); the end of the upper clamping block (28) 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. The electroplating wastewater recovery device of flocculation sedimentation according to claim 1 is characterized by: 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.

5. The electroplating wastewater recovery device of flocculation sedimentation according to claim 1 is characterized by: It also includes a positioning plate (61) vibration component arranged inside the wastewater treatment tank (11); The vibration assembly comprises a columnar guide rod (41) fixedly connected to the center of the bottom surface of the partition (12); a spiral groove (42) is formed on the top outer surface of the columnar guide rod (41); a limit block (43) is slidably connected to the top outer surface of the columnar guide rod (41); a wedge block (44) is fixedly connected to the inner wall of the limit block (43); an upper hemispherical vibration block (45) is fixedly connected to the bottom outer surface of the limit block (43) in an annular array at equal intervals; a connecting piece (46) is slidably connected to the outer surface of the columnar guide rod (41); a lower hemispherical vibration block (47) is fixedly connected to the top outer surface of the connecting piece (46) in an annular array at equal intervals; and a tension spring (48) is fixedly connected to the outer surface of the limit block (43).

6. The electroplating wastewater recovery device of flocculation sedimentation according to claim 5 is characterized by: The columnar guide rod (41) penetrates 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 (11); the end of the wedge block (44) away from the stop block (43) is slidably connected to the inside of the spiral groove (42); the outer surface of the bottom end 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 stop block (43); the upper hemispherical vibration blocks (45) and the lower hemispherical vibration blocks (47) arranged in a ring array are arranged alternately; the lower hemispherical vibration block (47) is located on the movement trajectory of the upper hemispherical vibration block (45).

7. The electroplating wastewater recovery device of flocculation sedimentation according to claim 5 is characterized by: Also included is a connecting assembly disposed below the lower blocking plate (27); The connecting assembly comprises a gear rod 1 (51) symmetrically fixedly connected to the lower surface of the lower blocking plate (27); a columnar guide rod (41) passes through the lower blocking plate (27) and is fixedly connected to the outer surface of one end thereof with a positioning block (52); a gear (53) is symmetrically rotatably connected inside the positioning block (52); and a gear rod 2 (54) is meshed on the side surface of the gear (53).

8. The electroplating wastewater recovery device of flocculation sedimentation according to claim 7 is characterized by: The gear rod 1 (51) and the gear rod 2 (54) are both vertically slidably connected to the inner wall of the sedimentation tank (16), and the gear rod 1 (51) and the gear rod 2 (54) are centrally symmetrically arranged with the center point of the gear (53) as a reference.

9. The electroplating wastewater recovery device of flocculation sedimentation according to claim 7, characterized in that: Also included is a scraping assembly disposed inside the sedimentation tank (16); The scraping assembly comprises a positioning plate (61) fixedly connected to the bottom end of the second toothed rod (54), limiting grooves (62) are provided inside both sides of the positioning plate (61), scraping plates (63) are slidably connected inside the limiting grooves (62), and fixed springs (64) are fixedly connected inside the scraping plates (63) at equal intervals.

10. The electroplating wastewater recovery device of flocculation sedimentation according to claim 9, characterized in that: The positioning plate (61) is slidably connected to the outer wall of the bottom end of the columnar guide rod (41), the scraper (63) is in contact with the side wall of the sedimentation tank (16) at a side away from the positioning plate (61), and the fixing spring (64) is fixedly connected to the groove wall of the limiting groove (62) at one end away from the scraper (63).

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