A new energy vehicle electrophoretic coating wastewater treatment and recovery device and method

Abstract

The present application relates to the technical field of electrophoretic coating wastewater treatment, and particularly relates to a new energy automobile electrophoretic coating wastewater treatment and recovery device and method, which comprises an equipment support frame, a plurality of contact wastewater outer shells are installed on the upper side of the equipment support frame, a wastewater flow groove is formed in the wastewater outer shell, the wastewater flow groove is reciprocatingly and bendedly arranged, the two ends of the wastewater flow groove are upward openings, and a water inlet pipe and a water outlet pipe are installed on the upper end of the wastewater outer shell. The present application can increase the moving track length of the wastewater in the wastewater outer shell through the reciprocatingly and bendedly arranged wastewater flow groove, limit the wastewater flow track, and the reaction liquid added by the medicine spraying frame to the wastewater flow groove can timely contact and react with the flowing wastewater under the limitation of the width of the wastewater flow groove, so as to increase the reaction degree of the wastewater, and the number of the wastewater outer shells for the reaction of the wastewater and the medicine can be increased according to the reaction efficiency and degree of each medicine, so as to fully purify and treat the wastewater.

Description

Technical Field

[0001] This invention relates to the technical field of electrophoretic coating wastewater treatment, and in particular to a device and method for treating and recycling electrophoretic coating wastewater from new energy vehicles. Background Technology

[0002] Electrophoretic coating is one of the key surface treatment processes in the manufacturing of new energy vehicles, mainly used to improve the corrosion resistance, weather resistance, and appearance quality of the vehicle body and key components. Compared with traditional fuel vehicles, new energy vehicles have higher requirements for electrophoretic coating due to the special nature of their structure (such as battery packs and lightweight materials) and functional requirements (such as battery safety). The wastewater from electrophoretic coating of new energy vehicles has a complex composition and usually contains heavy metal ions (such as Ni). 2+ Zn 2+ Cr 6+ It contains substances such as polymeric organic resins, pigments, solvents, and acidic / alkaline substances, characterized by high COD, high SS (suspended solids), high color, and strong acid / alkalinity. Direct discharge would severely pollute the environment; therefore, multi-stage treatment processes are required to achieve compliant discharge or reuse.

[0003] Electrophoretic wastewater often contains Ni 2+ Zn 2+ Cr 3+ Cr 6+ Heavy metal ions need to be removed by chemical precipitation. For hydroxide precipitation: adjust the pH to 8-10 (different metal ions require different pH values ​​for precipitation, such as Ni). 2+ Complete precipitation occurs at around pH 9.5. Adding alkali (NaOH, Ca(OH)2) produces insoluble hydroxide precipitates (such as Ni(OH)2, Zn(OH)2). Sulfide precipitation occurs by adding Na2S or FeS, producing even more insoluble metal sulfides (such as CuS, PbS). Reduction precipitation occurs (specifically for Cr). 6+ ): Cr 6+ It is highly toxic and requires a reducing agent (such as NaHSO3 or FeSO4) to first neutralize the Cr. 6+ Reduced to Cr 3+ (pH=2~3), then adjust the pH to 8~9, add alkali to generate Cr(OH)3 precipitate, and carry out multi-stage precipitation treatment.

[0004] Chinese patent CN216005562U discloses a wastewater recovery device for electrophoretic coating, including a recovery tank, a wastewater inlet pipe, a stirrer, a suction device, a support rod, a drain pipe, a V-shaped baffle, a filter port, and activated carbon. The wastewater inlet pipe is installed on one side of the recovery tank, the support rod is installed on the upper end of the recovery tank, the stirrer is fixed to the support rod, the suction device is fixed to a partition inside the recovery tank, the V-shaped baffle is installed inside the recovery tank, the filter port is installed on the V-shaped baffle, the activated carbon is placed on the upper end of the V-shaped baffle, and the drain pipe is installed at the lower end of the recovery tank. This invention achieves the separation of oily substances, particulate matter, and wastewater by stirring the wastewater with the stirrer, and quickly filters the wastewater through the V-shaped baffle. The sludge remaining on the V-shaped baffle after separation is quickly discharged through the drain pipe of the first tank, avoiding excessive sludge clogging the filter port and affecting the wastewater treatment effect.

[0005] In the aforementioned related technologies and existing technologies, wastewater is discharged into a sedimentation tank for sedimentation reaction treatment. However, this results in a large volume of wastewater that cannot react fully with the dispersed reaction liquid in a timely manner, leading to low wastewater treatment completeness and the discharge of wastewater containing a large amount of pollutant residues. Summary of the Invention

[0006] To address the problems mentioned in the background art, the present invention provides a device and method for treating and recycling wastewater from electrophoretic coating of new energy vehicles.

[0007] The present invention provides a wastewater treatment and recycling device for electrophoretic coating of new energy vehicles, which adopts the following technical solution: it includes an equipment support frame, on the upper side of the equipment support frame, multiple wastewater shells are installed in contact, a wastewater flow channel is opened inside the wastewater shell, the wastewater flow channel is arranged to bend up and down, both ends of the wastewater flow channel are upward openings, an inlet pipe and an outlet pipe are installed at the upper end of the wastewater shell, and the inlet pipe and the outlet pipe are respectively connected to the upper ends of both sides of the wastewater flow channel.

[0008] A connecting box is installed on the upper side between each pair of adjacent wastewater shells. The two ends of the connecting box are connected to the inlet pipe and outlet pipe of the two adjacent wastewater shells, respectively. A spraying rack for adding chemicals into the wastewater flow channel is installed on the upper end of the wastewater shell.

[0009] A sedimentation control mechanism is installed at the lower end of the wastewater casing. A vertically arranged sedimentation tank is opened at the bottom of each bend in the wastewater flow channel. The lower end of the sedimentation tank is connected to the sedimentation control mechanism. A sedimentation collection box is installed at the lower end of the sedimentation control mechanism. The lower end of the sedimentation collection box can be opened, and the sedimentation control mechanism can transfer the sediment in the sedimentation tank to the sedimentation collection box. At the same time, the sedimentation tank is not connected to the sedimentation collection box.

[0010] Optionally, the sedimentation control mechanism includes an intermediate box and a movable bar. The movable bar is slidably inserted into the interior of the intermediate box, and one end of the movable bar slides through the inner wall of the intermediate box. The movable bar can move relative to the intermediate box. The movable bar has multiple through slots that run vertically through it, and the number of through slots is twice the number of sedimentation tanks.

[0011] Each channel has a matching plug inserted inside. A vertical rod is coaxially installed at the lower end of the plug. The vertical rod is elastically connected to the movable bar. The vertical rod slides up and down relative to the movable bar. The upper end of the sedimentation collection tank is installed on the bottom surface of the intermediate tank. The upper end of the intermediate tank is installed on the bottom surface of the wastewater outer shell.

[0012] The bottom wall of the intermediate box has a long groove, and the bottom wall of the intermediate box has multiple staggered grooves. The uprights are inserted inside the long groove. The number of staggered grooves is one more than the number of sedimentation tanks. The staggered grooves and sedimentation tanks are connected to two adjacent through grooves respectively.

[0013] Optionally, inclined guide rods are installed on both sides of the inner wall of the misalignment groove. The inclined guide rods located on both sides inside the same misalignment groove are arranged in an inverted V-shape. The minimum distance between the two inclined guide rods arranged in an inverted V-shape is less than the maximum width of the block. The width of the misalignment groove is greater than the width of the through groove.

[0014] Optionally, the upper side of the movable bar has a sliding plate that can move relative to the intermediate box. One end of the plate slides through the inner wall of the intermediate box, and the upper surface of the plate slides in contact with the top wall of the intermediate box. The upper surface of the plate has a vertically connected reference groove on the upper side of each through groove. The reference groove has the same range as the sedimentation tank. A water filter plate is provided on one side of each sedimentation tank. The water filter plate is installed in the corresponding lower reference groove.

[0015] Optionally, a long shaft is horizontally arranged inside the sedimentation collection tank. The two ends of the long shaft rotate through the inner wall of the sedimentation collection tank. The long shaft rotates relative to the sedimentation collection tank. A variable diameter column is fixedly sleeved on the outer side of the long shaft at the bottom of each sedimentation tank. Both ends of the variable diameter column are beveled. The circumferential surface of each variable diameter column is in sliding contact with the lower end of the adjacent upright. The circumference of the variable diameter column is composed of a large diameter part and a small diameter part. The two sides of the large diameter part and the two sides of the small diameter part of the variable diameter column are connected by inclined surfaces.

[0016] Optionally, the spraying frame is fixedly inserted into the inner wall of the wastewater casing in the shape of a rod on the upper side of each sedimentation tank, and the two sides of the rod of the spraying frame extend into the interior of the wastewater flow channel in the shape of nozzles.

[0017] Optionally, the wastewater flow channel is equipped with multiple water-return plates on both sides of each rod of the spraying frame, and the water-return plates on both sides of the same rod of the spraying frame are distributed in a figure-eight shape.

[0018] Optionally, the distance between any two adjacent control tanks is equal to the distance between any two adjacent through tanks, the distance between any two adjacent staggered tanks is equal to the distance between any two adjacent sedimentation tanks, and the distance between any two adjacent staggered tanks is equal to half the distance between any two adjacent control tanks.

[0019] Optionally, triangular support blocks are provided on both sides of the wastewater outer shell. The bottom surface of the support blocks contacts the equipment support frame. The equipment support frame is provided with side support plates connected by bolts. The side support plates press and fix multiple wastewater outer shells on the upper side of the equipment support frame.

[0020] The method of using the wastewater treatment and recycling device for electrophoretic coating of new energy vehicles includes the following steps: S1. The wastewater to be treated is filled into the inlet pipe connected to the outermost wastewater shell.

[0021] S2. Add the treatment agent into the wastewater flow tank through the spraying rack. The wastewater added to the wastewater shell flows back and forth in the wastewater flow tank, increasing the flow trajectory of the wastewater and increasing the reaction time between the wastewater and the agent.

[0022] S3. Impurities generated by wastewater and reagents in the wastewater flow channel gradually settle at the bottom of each bend in the wastewater flow channel and fall into the corresponding sedimentation tank.

[0023] S4. After a certain amount of sediment has accumulated in the sedimentation tank during each wastewater treatment period, the sedimentation control mechanism transfers the sediment deposited in the sedimentation tank to the sedimentation collection box.

[0024] In summary, the present invention has the following beneficial technical effects: This invention, through the coordinated arrangement of components such as a wastewater outer shell, a connecting box, a wastewater flow channel, and a spraying frame, first adds the wastewater to be treated into the wastewater flow channel within the outermost wastewater outer shell. The reciprocatingly bent wastewater flow channel increases the length of the wastewater's movement trajectory within the wastewater outer shell, thus limiting the wastewater's flow path. Simultaneously, the reaction liquid added to the wastewater flow channel by the spraying frame can promptly contact and react with the flowing wastewater within the limited width of the wastewater flow channel, increasing the degree of reaction. Furthermore, the number of wastewater outer shells reacting with each agent can be increased according to the reaction efficiency and degree of each agent, resulting in thorough purification of the wastewater.

[0025] This invention utilizes a combination of components such as a misaligned trough, a sedimentation trough, a blocking block, and an inclined guide rod. Sediment in the wastewater flow channel falls into a corresponding connected channel through the sedimentation trough. The blocking block in the channel causes sediment to accumulate. As the movable bar moves, the channels connected to the sedimentation trough gradually misalign, connecting adjacent channels to the sedimentation trough. Then, the channel containing sediment moves to the misaligned trough position. The upright, under the elasticity of the movable bar, causes the blocking block to separate downwards from the channel, allowing the sediment in the channel to flow out and into the sedimentation collection tank through the misaligned trough. Sediment in the wastewater flow channel falls into a new channel through the sedimentation trough, ensuring continuous sediment collection during discharge.

[0026] This invention utilizes a combination of components such as slats, a control tank, a water-passing filter plate, and a variable-diameter column. Before the sediment accumulated in the channel needs to be discharged, the slats are first moved to move the water-passing filter plate below the sedimentation tank, preventing the sediment from falling further into the channel below. Then, the variable-diameter column is rotated so that its larger diameter portion contacts the upright, pushing the block upward to squeeze the sediment closer to the water-passing filter plate, squeezing out the wastewater in the channel. Next, the movable bar is moved, and after the block is misaligned with the sedimentation tank, the upright separates from the variable-diameter column. The block below the sediment, after being squeezed, detaches downward from the channel, while the slats reset. The smaller diameter portion of the variable-diameter column rotates to the underside of the upright, causing the water-passing filter plate to misalign with the sedimentation tank again, allowing the sediment to fall into the new channel. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure in an embodiment of the present invention; Figure 2 This is a schematic diagram of the connection between the water outlet pipe and the connecting box in an embodiment of the present invention; Figure 3 This is a side view of the wastewater flow channel in an embodiment of the present invention. Figure 4 This is a schematic diagram of the internal structure of the wastewater outer shell in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure inside the intermediate tank and the sedimentation collection tank in an embodiment of the present invention; Figure 6 This is a side view of the inner structure of the sedimentation collection box and the intermediate box in an embodiment of the present invention; Figure 7 This is a schematic diagram of the distribution of multiple uprights and multiple variable-diameter columns in an embodiment of the present invention; Figure 8 This is a side view diagram of the variable diameter column and upright in an embodiment of the present invention; Figure 9 This is a schematic diagram of the connection between the upright and the blocking block in an embodiment of the present invention.

[0028] Reference numerals: 1. Equipment support frame; 2. Wastewater outer shell; 3. Wastewater flow channel; 4. Inlet pipe; 5. Sedimentation control mechanism; 51. Intermediate box; 52. Movable bar; 521. Slat; 522. Control tank; 523. Water filter plate; 524. Long shaft; 525. Variable diameter column; 53. Through channel; 54. Block; 55. Vertical pole; 56. Long strip channel; 57. Offset channel; 58. Inclined guide rod; 6. Outlet pipe; 7. Connecting box; 8. Sedimentation tank; 9. Sedimentation collection box; 10. Spraying rack; 11. Water baffle and return plate; 12. Support block; 13. Side support plate. Detailed Implementation

[0029] The following is in conjunction with the appendix Figures 1-9 The present invention will be described in further detail below.

[0030] This invention discloses a device for treating and recycling wastewater from electrophoretic coating in new energy vehicles. For example... Figures 1-9 As shown, the device includes an equipment support frame 1. Multiple wastewater housings 2 are mounted on the upper side of the equipment support frame 1 and are in contact with each other. Triangular support blocks 12 are provided on both sides of the wastewater housings 2. The bottom surface of the support blocks 12 is in contact with the equipment support frame 1. The equipment support frame 1 is provided with side support plates 13 connected by bolts. The side support plates 13 press and fix the multiple wastewater housings 2 on the upper side of the equipment support frame 1. The upper end of the equipment support frame 1 is in the form of a frame adapted to the wastewater housings 2. The wastewater housings 2 are suspended inside the frame of the equipment support frame 1 by the support blocks 12. One side of the wastewater housing 2 is in contact with one end of the equipment support frame 1, and the other side of the wastewater housing 2 is pressed by the side support plate 13. The number of wastewater housings 2 is controlled by the required treatment process of the wastewater.

[0031] The wastewater outer shell 2 has a wastewater flow channel 3 inside. The wastewater flow channel 3 is arranged in a reciprocating up-and-down bend, and both ends of the wastewater flow channel 3 are upward openings. Compared with the integral cavity set inside the wastewater outer shell 2, it increases the flow trajectory of wastewater inside the wastewater outer shell 2. The upper end of the wastewater outer shell 2 is equipped with an inlet pipe 4 and an outlet pipe 6. The inlet pipe 4 and the outlet pipe 6 are respectively connected to the upper ends of the two sides of the wastewater flow channel 3. The initial wastewater is added into the inner wastewater flow channel 3 from the inlet pipe 4 of the outermost wastewater outer shell 2, and the finally purified wastewater is discharged from the outermost outlet pipe 6 on the other side.

[0032] A connecting box 7 is provided on the upper side between each pair of adjacent wastewater shells 2. The two ends of the connecting box 7 are connected to the inlet pipe 4 and the outlet pipe 6 of the two adjacent wastewater shells 2, respectively. After the wastewater in the previous wastewater shell 2 is purified, it enters the connecting box 7 through the corresponding outlet pipe 6, and flows into the inlet pipe 4 of the next adjacent wastewater shell 2 through the inside of the connecting box 7.

[0033] A sprayer 10 for adding chemicals to the wastewater flow channel 3 is installed on the upper end of the wastewater outer shell 2. Each sprayer 10 is connected to the storage device of the corresponding chemical. A one-way valve is installed inside the sprayer 10 so that the chemical can only flow into the wastewater flow channel 3 in one direction. The sprayer 10 is located on the upper side of each sedimentation tank 8 and is fixedly inserted into the inner wall of the wastewater outer shell 2 in the shape of a rod. The two sides of the rod of the sprayer 10 extend into the interior of the wastewater flow channel 3 in the shape of nozzles. The sprayer 10 can add chemicals to different positions in the wastewater flow channel 3, increasing the uniformity of the mixing of wastewater and chemicals. At the same time, due to the limitation of the width of the wastewater flow channel 3, the flowing wastewater can fully react with the chemicals, increasing the degree of reaction of the wastewater.

[0034] The wastewater flow channel 3 is located on both sides of each rod of the spray frame 10. Multiple water-blocking and return plates 11 are installed. The water-blocking and return plates 11 on both sides of the same rod of the spray frame 10 are distributed in a figure-eight shape. The liquid sprayed from the spray frame 10 is blocked by the inclined water-blocking and return plates 11, which causes the liquid to form a reverse impact, increasing the dispersion of the liquid. At the same time, the reverse-flowing liquid drives the wastewater inside to flow in the reverse direction over a short distance, further increasing the reaction and mixing degree between the wastewater and the liquid.

[0035] A sedimentation control mechanism 5 is installed at the lower end of the wastewater outer shell 2. A vertically set sedimentation tank 8 is opened at the bottom of each bend in the wastewater flow channel 3. The sediment produced by the reaction of wastewater with the reagent in different vertical parts of the wastewater flow channel 3 gradually falls into the sedimentation tank 8 on the lower side under gravity.

[0036] The lower end of the sedimentation tank 8 is connected to the sedimentation control mechanism 5. The lower end of the sedimentation control mechanism 5 is connected to the sedimentation collection box 9. The lower end of the sedimentation collection box 9 can be opened to discharge the sediment stored inside. The sedimentation control mechanism 5 can transfer the sediment in the sedimentation tank 8 to the sedimentation collection box 9. At the same time, the sedimentation tank 8 is not connected to the sedimentation collection box 9.

[0037] The sedimentation control mechanism 5 includes an intermediate box 51 and a movable bar 52. The movable bar 52 is slidably inserted into the interior of the intermediate box 51. One end of the movable bar 52 slides through the inner wall of the intermediate box 51. The movable bar 52 can move relative to the intermediate box 51. The movable bar 52 has multiple through slots 53 that run vertically through it. The number of through slots 53 is twice the number of sedimentation tanks 8.

[0038] Each channel 53 has a matching plug 54 inserted inside. The upper end of the plug 54 is set as a pointed end. When the plug 54 is separated from the channel 53, the sediment on the upper side is not easy to remain on the upper side of the plug 54. The lower end of the plug 54 is coaxially mounted with a vertical rod 55. The vertical rod 55 is elastically connected to the movable bar 52. The vertical rod 55 and the movable bar 52 are connected by a spring, which has the tendency to push the vertical rod 55 downward. The vertical rod 55 slides up and down relative to the movable bar 52. The upper end of the sedimentation collection box 9 is installed on the bottom surface of the intermediate box 51. The upper end of the intermediate box 51 is installed on the bottom surface of the wastewater outer shell 2.

[0039] The bottom wall of the intermediate box 51 is provided with a long groove 56 and multiple staggered grooves 57. When the blocking block 54 is misaligned with the staggered groove 57, the blocking block 54 contacts the bottom wall of the intermediate box 51 under the elasticity of the movable bar 52, so that the blocking block 54 blocks the lower end of the through groove 53. The sediment falling in the sedimentation tank 8 can accumulate on the upper side of the blocking block 54 inside the through groove 53. The upright 55 is inserted inside the long groove 56. The number of staggered grooves 57 is one more than the number of sedimentation tanks 8. The staggered grooves 57 and sedimentation tanks 8 are respectively connected to two adjacent through grooves 53. The minimum distance between the sedimentation tank 8 and the adjacent staggered groove 57 is greater than the width of the through groove 53, ensuring that the through groove 53 will not be connected to the staggered groove 57 and sedimentation tank 8 at the same time when it moves with the movable bar 52, preventing the wastewater in the wastewater flow tank 3 from flowing directly into the sedimentation collection tank 9.

[0040] Inclined guide rods 58 are installed on both sides of the inner wall of the misalignment groove 57. The inclined guide rods 58 located on both sides inside the same misalignment groove 57 are arranged in an inverted V-shape. The minimum distance between the two inclined guide rods 58 arranged in an inverted V-shape is less than the maximum width of the block 54, so that the block 54 will not move to the underside of the inclined guide rods 58. As the block 54 gradually moves away from the misalignment groove 57, the bottom surface of the block 54 slides on the upper surface of the inclined guide rods 58 and gradually moves upward to re-insert into the through groove 53. The width of the misalignment groove 57 is greater than the width of the through groove 53.

[0041] The sediment in the wastewater flow channel 3 falls into the corresponding connected channel 53 through the sedimentation tank 8. The block 54 in the channel 53 causes the sediment to accumulate in the channel 53. When the movable bar 52 moves, the channel 53 connected to the sedimentation tank 8 is gradually misaligned, so that the adjacent channel 53 is connected to the sedimentation tank 8. Then the channel 53 with accumulated sediment moves to the position of the misaligned channel 57. The upright 55, under the elasticity of the movable bar 52, drives the block 54 downward to separate from the channel 53. The sediment in the channel 53 flows out and flows into the sedimentation collection box 9 through the misaligned channel 57. The sediment in the wastewater flow channel 3 falls into the new channel 53 through the sedimentation tank 8. The sediment can be continuously collected when it is discharged.

[0042] A slat 521 is slidably contacted on the upper side of the movable bar 52. The slat 521 can move relative to the intermediate box 51. One end of the slat 521 slides through the inner wall of the intermediate box 51. The upper surface of the slat 521 contacts and slides with the inner top wall of the intermediate box 51. A vertically connected reference groove 522 is opened on the upper side of each through groove 53. The reference groove 522 is the same size as the sedimentation tank 8. A water filter plate 523 is provided on one side of each sedimentation tank 8. The water filter plate 523 can block the sedimentation by allowing water to pass through. The water filter plate 523 is installed in the corresponding lower reference groove 522. The water filter plates 523 are installed at intervals in the reference groove 522.

[0043] The distance between any two adjacent control tanks 522 is equal to the distance between any two adjacent through tanks 53, the distance between any two adjacent misaligned tanks 57 is equal to the distance between any two adjacent sedimentation tanks 8, and the distance between any two adjacent misaligned tanks 57 is equal to half the distance between any two adjacent control tanks 522.

[0044] A long shaft 524 is horizontally arranged inside the sedimentation collection tank 9. The two ends of the long shaft 524 rotate through the inner wall of the sedimentation collection tank 9. The long shaft 524 rotates relative to the sedimentation collection tank 9. A variable diameter column 525 is fixedly sleeved on the outer side of the long shaft 524 at the bottom of each sedimentation tank 8. Both ends of the variable diameter column 525 are beveled. When the upright 55, which is not in contact with the variable diameter column 525, moves with the movable bar 52, the upright 55 moves to the circumferential surface of the variable diameter column 525 through the beveled part of the variable diameter column 525. The circumferential surface of each variable diameter column 525 slides in contact with the lower end of the adjacent upright 55. The circumference of the variable diameter column 525 is composed of a large diameter part and a small diameter part. When the upright 55 is in the small diameter part of the variable diameter column 525, the block 54 can be disengaged from the through groove 53. The two sides of the large diameter part and the two sides of the small diameter part of the variable diameter column 525 are connected by inclined surfaces.

[0045] Before the sediment accumulated in the channel 53 needs to be discharged, first control the movement of the slats 521 to move the water filter plate 523 to the bottom of the sedimentation tank 8, so that the sediment will not continue to fall into the channel 53 below. Then control the rotation of the variable diameter column 525 so that the large diameter part contacts the upright 55, pushing the block 54 upward to squeeze the sediment closer to the water filter plate 523, squeezing out the wastewater in the channel 53. Then control the movement of the movable bar 52. After the block 54 is misaligned with the sedimentation tank 8, the upright 55 separates from the variable diameter column 525. The block 54 on the bottom side of the sediment, after being squeezed, moves downward and detaches from the channel 53. At the same time, the slats 521 resets, and the small diameter part of the variable diameter column 525 rotates to the bottom of the upright 55, so that the water filter plate 523 is misaligned with the sedimentation tank 8 again, and the sediment can fall into the new channel 53.

[0046] A bevel gear meshing assembly is installed on the outside of the sedimentation collection tank 9 on the long shaft 524. The bevel gear meshing assembly consists of two meshing bevel gears. One bevel gear is connected to the long shaft 524. The bevel gears connected to adjacent sedimentation collection tanks 9 are coaxially inserted and can rotate synchronously. The equipment support frame 1 is equipped with a power shaft driven by a motor. The power shaft is coaxially inserted with the outermost bevel gear. The power shaft drives all the bevel gears to rotate synchronously through the connected bevel gears. At the same time, the bevel gear corresponding to the new wastewater outer shell 2 can be connected and engaged with the adjacent bevel gears to obtain power transmission.

[0047] Both movable bar 52 and plate slat 521 have plate-like structures installed at one end outside the intermediate box 51, and the two plate-like structures between adjacent intermediate boxes 51 are connected by bolts, so that the plate-like structures corresponding to movable bar 52 and plate slat 521 can move simultaneously. The equipment support frame 1 is equipped with two electric telescopic rods, which can control the movement of the plate-like structures connected to movable bar 52 and plate slat 521 respectively.

[0048] The method of using the wastewater treatment and recycling device for electrophoretic coating of new energy vehicles includes the following steps: S1. Wastewater to be treated is filled into the inlet pipe 4 connected to the outermost wastewater shell 2.

[0049] S2. The treatment agent is added into the wastewater flow channel 3 through the spraying rack 10. The wastewater added into the wastewater shell 2 flows back and forth in the wastewater flow channel 3, increasing the flow trajectory of the wastewater and increasing the reaction time between the wastewater and the agent.

[0050] S3. Impurities generated by wastewater and reagents in the wastewater flow tank 3 gradually settle at the bottom of each bend in the wastewater flow tank 3 and fall into the corresponding sedimentation tank 8.

[0051] S4. After a certain amount of sediment has accumulated in the sedimentation tank 8 after each period of wastewater treatment, the sedimentation control mechanism 5 transfers the sediment deposited in the sedimentation tank 8 to the sedimentation collection box 9.

[0052] The working principle is as follows: Wastewater to be treated is filled into the inlet pipe 4 connected to the outermost wastewater shell 2. The wastewater flows in the wastewater flow channel 3. The treatment agent is added into the wastewater flow channel 3 through the spraying frame 10. The wastewater added into the wastewater shell 2 flows back and forth in the wastewater flow channel 3. The back-and-forth bending of the wastewater flow channel 3 increases the length of the movement trajectory of the wastewater in the wastewater shell 2, and increases the reaction time between the wastewater and the agent. At the same time, the reaction liquid added by the spraying frame 10 to the wastewater flow channel 3 is limited by the width of the wastewater flow channel 3. It can react with flowing wastewater in a timely manner, increasing the degree of reaction of the wastewater. Impurities generated by the wastewater and the reagent in the wastewater flow tank 3 gradually settle at the bottom of each bend of the wastewater flow tank 3 and fall into the corresponding sedimentation tank 8. After a certain amount of sediment accumulates in the sedimentation tank 8 after each wastewater treatment period, the sedimentation control mechanism 5 transfers the sediment deposited in the sedimentation tank 8 to the sedimentation collection box 9. At the same time, according to the reaction efficiency and degree of each reagent, the number of wastewater shells 2 that react with the reagent can be increased to further increase the degree of wastewater purification.

[0053] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A wastewater treatment and recycling device for electrophoretic coating of new energy vehicles, comprising an equipment support frame (1), characterized in that: Multiple wastewater shells (2) are installed on the upper side of the equipment support frame (1). A wastewater flow channel (3) is opened inside the wastewater shell (2). The wastewater flow channel (3) is arranged in a reciprocating up-and-down bending manner. Both ends of the wastewater flow channel (3) are upward openings. An inlet pipe (4) and an outlet pipe (6) are installed on the upper end of the wastewater shell (2). The inlet pipe (4) and the outlet pipe (6) are respectively connected to the upper ends of both sides of the wastewater flow channel (3). A connecting box (7) is provided on the upper side between each two adjacent wastewater shells (2). The two ends of the connecting box (7) are connected to the inlet pipe (4) and outlet pipe (6) of the two adjacent wastewater shells (2), respectively. A spraying rack (10) for adding agents to the wastewater flow channel (3) is installed on the upper end of the wastewater shell (2). The wastewater outer shell (2) is equipped with a sedimentation control mechanism (5) at the lower end. Each bend in the wastewater flow channel (3) is provided with a vertically arranged sedimentation tank (8). The lower end of the sedimentation tank (8) is connected to the sedimentation control mechanism (5). The lower end of the sedimentation control mechanism (5) is connected to a sedimentation collection box (9). The lower end of the sedimentation collection box (9) can be opened. The sedimentation control mechanism (5) can transfer the sediment in the sedimentation tank (8) to the sedimentation collection box (9). At the same time, the sedimentation tank (8) is not connected to the sedimentation collection box (9). The sedimentation control mechanism (5) includes an intermediate box (51) and a movable bar (52). The movable bar (52) is slidably inserted into the interior of the intermediate box (51). One end of the movable bar (52) slides through the inner wall of the intermediate box (51). The movable bar (52) can move relative to the intermediate box (51) by power. The movable bar (52) has multiple through slots (53) that run vertically through it. The number of through slots (53) is twice the number of sedimentation tanks (8). Each channel (53) is fitted with a matching plug (54). A vertical rod (55) is coaxially installed at the lower end of the plug (54). The vertical rod (55) is elastically connected to the movable bar (52). The vertical rod (55) slides up and down relative to the movable bar (52). The upper end of the sedimentation collection box (9) is installed on the bottom surface of the intermediate box (51). The upper end of the intermediate box (51) is installed on the bottom surface of the wastewater outer shell (2). The bottom wall of the intermediate box (51) is provided with a long groove (56) and a number of staggered grooves (57) are provided on the bottom wall of the intermediate box (51). The uprights (55) are inserted inside the long grooves (56). The number of staggered grooves (57) is one more than the number of sedimentation tanks (8). The staggered grooves (57) and sedimentation tanks (8) are respectively connected to two adjacent through grooves (53). Inclined guide rods (58) are installed on both sides of the inner wall of the misaligned groove (57). The inclined guide rods (58) located on both sides inside the same misaligned groove (57) are arranged in an inverted V shape. The minimum distance between the two inclined guide rods (58) arranged in an inverted V shape is less than the maximum width of the block (54). The width of the misaligned groove (57) is greater than the width of the through groove (53).

2. The new energy vehicle electrophoretic coating wastewater treatment and recycling device according to claim 1, characterized in that: The upper side of the movable bar (52) is in contact with a slat (521). The slat (521) can move relative to the intermediate box (51). One end of the slat (521) slides through the inner wall of the intermediate box (51). The upper surface of the slat (521) is in contact with the inner top wall of the intermediate box (51). The upper surface of the slat (521) is located on the upper side of each through groove (53) and a vertically connected reference groove (522) is provided. The reference groove (522) is the same as the sedimentation tank (8). Each sedimentation tank (8) is provided with a water filter plate (523) on one side. The water filter plate (523) is installed in the corresponding lower reference groove (522).

3. The new energy vehicle electrophoretic coating wastewater treatment and recycling device according to claim 2, characterized in that: The sedimentation collection box (9) is horizontally provided with a long shaft (524) on the inner side. The two ends of the long shaft (524) rotate through the inner wall of the sedimentation collection box (9). The long shaft (524) rotates relative to the sedimentation collection box (9). The outer side of the long shaft (524) is fixedly sleeved with a variable diameter column (525) on the lower side of each sedimentation tank (8). Both ends of the variable diameter column (525) are beveled. The circumferential surface of each variable diameter column (525) slides in contact with the lower end of the adjacent upright (55). The circumferential range of the variable diameter column (525) is composed of a large diameter part and a small diameter part. The two sides of the large diameter part and the two sides of the small diameter part of the variable diameter column (525) are connected by inclined surfaces.

4. The new energy vehicle electrophoretic coating wastewater treatment and recycling device according to claim 1, characterized in that: The spraying rack (10) is located on the upper side of each sedimentation tank (8) and is fixedly inserted into the inner wall of the wastewater outer shell (2). The two sides of the spraying rack (10) extend into the wastewater flow channel (3) in the form of nozzles.

5. The new energy vehicle electrophoretic coating wastewater treatment and recycling device according to claim 4, characterized in that: The wastewater flow channel (3) is located on both sides of each rod of the spraying frame (10), and multiple water-blocking and liquid-returning plates (11) are installed. The water-blocking and liquid-returning plates (11) on both sides of the same rod of the spraying frame (10) are distributed in a figure-eight shape.

6. The new energy vehicle electrophoretic coating wastewater treatment and recycling device according to claim 2, characterized in that: The distance between any two adjacent control tanks (522) is equal to the distance between any two adjacent through tanks (53), the distance between any two adjacent misaligned tanks (57) is equal to the distance between any two adjacent sedimentation tanks (8), and the distance between any two adjacent misaligned tanks (57) is equal to half the distance between any two adjacent control tanks (522).

7. The new energy vehicle electrophoretic coating wastewater treatment and recycling device according to claim 1, characterized in that: The wastewater shell (2) is provided with triangular support blocks (12) on both sides. The bottom surface of the support blocks (12) is in contact with the equipment support frame (1). The equipment support frame (1) is provided with side support plates (13) connected by bolts. The side support plates (13) press and fix the multiple wastewater shells (2) on the upper side of the equipment support frame (1).

8. The method of using the new energy vehicle electrophoretic coating wastewater treatment and recycling device according to any one of claims 1-7, characterized in that: Includes the following steps: S1. The wastewater to be treated is filled into the inlet pipe (4) connected to the outermost wastewater shell (2); S2. Add treatment agent into wastewater flow tank (3) through spray rack (10). The wastewater added into the wastewater shell (2) flows back and forth in the wastewater flow tank (3), increasing the flow trajectory of the wastewater and increasing the reaction time between the wastewater and the agent. S3. Impurities generated by wastewater and reagents in the wastewater flow tank (3) gradually settle at the bottom of each bend of the wastewater flow tank (3) and fall into the corresponding sedimentation tank (8); S4. After a certain amount of sediment accumulates in the sedimentation tank (8) for a period of time during wastewater treatment, the sedimentation control mechanism (5) transfers the sediment deposited in the sedimentation tank (8) to the sedimentation collection box (9).

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