CN115974310A

CN115974310A - Method and device for recycling automobile electrophoresis wastewater

Info

Publication number: CN115974310A
Application number: CN202211608881.6A
Authority: CN
Inventors: 张雷; 金锐; 耿笑荣; 宣言; 刘通
Original assignee: Intelligent Manufacturing Institute of Hefei University Technology
Current assignee: Intelligent Manufacturing Institute of Hefei University Technology
Priority date: 2022-12-14
Filing date: 2022-12-14
Publication date: 2023-04-18

Abstract

The invention discloses a recycling method of automobile electrophoresis wastewater, which comprises the following steps: performing primary treatment on the electrophoretic pool wastewater, removing solid particles in the electrophoretic wastewater by using a solid-liquid centrifugal separation device, introducing one part of the pretreated electrophoretic wastewater into a pretreatment water tank, and introducing the other part of the pretreated electrophoretic wastewater into a tubular ultrafilter; the method has simple steps, can prolong the service life of the ultrafiltration membrane, simultaneously improves the recovery rate of the electrophoretic wastewater, and has good social and economic benefits. The invention also discloses a device for recycling the automobile electrophoresis wastewater, the solid-liquid centrifugal separation device comprises a fixed outer cylinder, the top of the fixed outer cylinder is provided with an automatic opening upper cover, the automatic opening upper cover is provided with a hydraulic self-rotating spray head and a separation liquid outlet pipeline, the structure is simple, the effect of pretreating the electrophoresis wastewater is good, the annular slag scraping knife can improve the slag scraping efficiency, and the slag removing time is shortened, so that the working efficiency of the centrifugal machine is improved.

Description

Method and device for recycling automobile electrophoresis wastewater

Technical Field

The invention relates to the field of automobile coating wastewater treatment, in particular to a method and a device for recycling automobile electrophoresis wastewater.

Background

The electrophoretic coating production process is widely used in the automobile industry, the current automobile industry is rapidly developing, and meanwhile, the more and more waste water generated by automobile electrophoretic coating is shown, if the electrophoretic coating waste water is not recycled, the electrophoretic coating cost is increased, and the environment is also polluted.

At present, the recycling of the electrophoretic coating wastewater mainly and directly uses an ultrafiltration device and an EDRO system to treat the wastewater, so that the direct use can shorten the service life of the ultrafiltration membrane, lead the ultrafiltration membrane to be frequently replaced and increase the production cost; or a disc filter, an activated carbon filter, a polypropylene filter bag and the like are used for pretreatment, the service life of the ultrafiltration membrane is prolonged to a certain extent, but the filters also need to be replaced frequently, and the production cost cannot be reduced well.

Meanwhile, the centrifugal separator can separate solid particles from liquid in the solution, and the separation efficiency is high; however, the traditional centrifugal solid-liquid separator has the following defects:

1. the vertical scraper is used for scraping slag, the slag scraping efficiency is low, and the waste slag on the wall of the centrifugal rotating drum is not completely cleaned.

2. The water pipe is used for directly supplying liquid into the centrifugal rotating drum rotating at high speed, and the centrifugal rotating drum can form turbulent flow, which is not favorable for stable centrifugal separation.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a recycling device for automobile electrophoresis wastewater, which has a simple structure and a good effect of pretreating the electrophoresis wastewater, can improve the slag scraping efficiency by using an annular slag scraping knife, and shortens the slag removing time so as to improve the working efficiency of a centrifugal machine; the hydraulic self-rotating spray head can ensure that the waste liquid entering the rotating drum has a certain initial speed and an inclined angle, thereby avoiding the turbulence generated by the vertical mixing of the newly-entered waste liquid and the high-speed rotating solution in the drum and ensuring the stable operation of the centrifuge.

The invention also provides a recycling method of the automobile electrophoresis wastewater, which has simple steps, can prolong the service life of the ultrafiltration membrane, simultaneously improves the recycling rate of the electrophoresis wastewater, and has good social benefit and economic benefit.

In order to realize the purpose, the invention is realized by the following technical scheme: a recycling method of automobile electrophoresis wastewater comprises the following steps:

a pretreatment step: performing primary treatment on the electrophoretic pool wastewater, removing solid particles in the electrophoretic wastewater by using a solid-liquid centrifugal separation device, introducing one part of the pretreated electrophoretic wastewater into a pretreatment water tank, and introducing the other part of the pretreated electrophoretic wastewater into a tubular ultrafilter;

a tubular ultrafilter treatment step: filtering the electrophoresis wastewater entering the tubular ultrafilter to remove particles with the diameter larger than nm in the electrophoresis wastewater, refluxing the filtered electrophoresis raw paint back to the electrophoresis cell through concentrated solution, introducing part of the passed pretreatment solution into an ultrafiltration water tank, and introducing part of the passed pretreatment solution into an EDRO device;

and (3) filtering by the EDRO device: and (4) treating the pretreatment liquid entering the EDRO device to obtain pure water after the treatment of the EDRO device.

Further inject, the first pump that sprays is connected to the preliminary treatment water tank, uses preliminary treatment liquid to carry out the washing that sprays for the first time to the automobile body that goes out the electrophoresis cell.

And further limiting, the ultrafiltration water tank is connected with a second spray pump, and ultrafiltrate is used for carrying out secondary spray cleaning on the vehicle body with water discharged from the second ultrafiltration tank.

And further limiting, the pure water obtained by the EDRO device treatment is connected with a third spray pump, and the pure water is used for carrying out third spray cleaning on the vehicle body with the water discharged from the pure water pool.

Further limit, overflow valves are sequentially connected among the pure water tank, the second ultra-filter tank, the first ultra-filter tank and the electrophoresis cell.

The utility model provides an automobile electrophoresis waste water recycle device, adopts above automobile electrophoresis waste water recycle method, solid-liquid centrifugal separation device has the automatic upper cover that opens and shuts including fixed urceolus, the top of fixed urceolus, and automatic opening and shutting is covered and is installed water conservancy autogyration shower nozzle and separation liquid outlet conduit, and the first water pump of entry linkage on water conservancy autogyration shower nozzle top, separation liquid outlet conduit connects the second water pump, and the export of second water pump passes through a mouth of pipe connection preliminary treatment liquid delivery port of distributive pipe, another mouth of pipe connection pipe formula ultrafilter of distributive pipe, the exit linkage third water pump of tubular ultrafilter, the exit linkage ultrafiltrate delivery port of third water pump and the entry of EDRO device.

Further prescribe a limit, the lateral wall vertical installation of fixed urceolus has the second cylinder, and the piston rod on second cylinder top is connected with first pivot, and rotatable coupling has a T type connecting rod in the first pivot, and the one end that first pivot was kept away from to T type connecting rod is connected with the automatic opening upper cover, and the bottom of T type connecting rod is connected with fixed urceolus through the second pivot.

Further inject, the bottom surface of fixed urceolus is equipped with the waste residue discharging pipe rather than the inner chamber intercommunication, and fixed urceolus bottom center department installs the motor, and the output shaft at the top of motor passes through the shaft joint and connects centrifugal rotary drum, and the center of centrifugal rotary drum bottom surface is the boss shape, and the bottom surface utensil waste residue discharge gate of centrifugal rotary drum, waste residue discharge gate play are equipped with the electric control valve, the bottom of separation liquid outlet conduit is equipped with the filter screen and extends to the bottom of centrifugal rotary drum inner chamber.

Further inject, water conservancy autogyration shower nozzle includes by supreme first water-saving pipe, second water-saving pipe and the third water-saving pipe that sets gradually down, and the inside rotatable coupling of first water-saving pipe has helical blade, and the side of third water-saving pipe bottom is equipped with the shower, and the outside of first water-saving pipe is connected with the mount pad through self-aligning ball bearing, the mount pad is located in the center of automatic opening upper cover through the bolt mounting.

Further inject, first cylinder and third cylinder are installed to the symmetry on the fixed urceolus, the inboard of centrifugation rotary drum is equipped with the annular sword of scraping the sediment rather than the inner wall laminating, the piston rod of first cylinder and third cylinder respectively with the annular upper surface connection who scrapes the sediment sword, the annular is scraped and is had round water conservancy diversion chamber in the sediment sword, the annular top of scraping the sediment sword be equipped with the water filling port of water conservancy diversion chamber intercommunication, the annular bottom surface of scraping the sediment sword encircles the water jet that distributes and lead the chamber intercommunication.

The invention has the following beneficial effects:

1. the solid-liquid centrifugal separation device is applied to the recycling link of the electrophoretic waste liquid, and solid particles such as air dust, metal particles and the like in the electrophoretic waste liquid are removed, so that the service life of a subsequent ultrafiltration membrane can be prolonged, and the replacement frequency is reduced; simultaneously, the pretreatment liquid after centrifugal separation treatment can be directly used for electrophoresis and spraying out of the tank, so that a small amount of electrophoretic paint attached to the car body and impurities can directly return to the electrophoretic pool.

2. The annular slag scraping knife is arranged, so that the centrifugal drum of the centrifugal separation device can remove slag more efficiently, and the annular slag scraping knife can remove slag of the centrifugal drum only by moving up and down once; meanwhile, the middle circle of the annular slag scraping knife is provided with the water spray nozzle, so that the slag scraping part is washed while the slag is scraped, and the slag removing quality is improved.

3. Through setting up water conservancy autogyration shower nozzle, make the electrophoresis waste water evenly distributed who gets into in the centrifugal rotary drum at the centrifugal rotary drum, the waste water that comes out through water conservancy autogyration shower nozzle simultaneously can alleviate the impact when contacting with the high-speed pivoted waste liquid in the bucket owing to inertia can have certain inclination to avoid turbulent production.

Drawings

FIG. 1 is a flow chart of the present invention;

FIG. 2 is a schematic view of the overall mounting structure of the present invention;

FIG. 3 is a perspective view of the solid-liquid centrifugal separator of the present invention;

FIG. 4 is a half sectional view of the solid-liquid centrifugal separation apparatus of the present invention;

FIG. 5 is a schematic view of a hydraulic self-rotating showerhead of the present invention;

FIG. 6 is a cross-sectional view of a hydraulic self-rotating showerhead of the present invention;

FIG. 7 is a schematic view of the installation of the annular slag scraping blade of the present invention;

fig. 8 is a partial cross-sectional view of an annular skiving knife of the present invention.

In the figure: 1. a waste liquid inlet; 2. a first manual valve; 3. a first water pump; 4. a first pressure gauge; 5. a solid-liquid centrifugal separation device; 51. fixing the outer cylinder; 52. automatically opening and closing the upper cover; 53. a first cylinder; 54. a hydraulic self-rotating spray head; 541. a shower pipe; 542. a first section of pipeline; 543. a mounting seat; 544. a self-aligning ball bearing; 545. assembling and disassembling the ring; 546. a second section of pipeline; 547. a third section of pipeline; 548. a helical blade; 549. a circlip for the shaft; 5410. a spring; 5411. a ball bearing; 55. a T-shaped connecting rod; 56. a first rotating shaft; 57. a second rotating shaft; 58. a second cylinder; 59. a waste residue discharge pipe; 510. a separation liquid outlet pipeline; 511. a third cylinder; 512. a motor; 513. a coupling; 514. a centrifugal drum; 515. an annular slag scraping knife; 5151. a water jet; 5152. a water injection port; 516. a support plate; 517. a waste residue discharge hole; 518. an electrically controlled valve; 519. a slag scraping knife connecting seat; 520. a rotating drum transmission shaft; 6. a second manual valve; 7. a second water pump; 8. a third manual valve; 9. a pretreatment liquid outlet; 10. a second pressure gauge; 11. a tubular ultrafilter; 12. a fourth manual valve; 13. a third water pump; 14. a pure water outlet; 15. an EDRO device; 16. a fifth manual valve; 17. a concentrate return line; 18. a third pressure gauge; 19. a sixth manual valve; 20. a seventh manual valve; 21. an ultrafiltrate water outlet; 22. a base; 23. the electrophoresis is discharged from a bath spray header; 24. a first spray pump; 25. ultra-filtering out of the spray header of the tank; 26. a second spray pump; 27. an overflow valve; 28. pure water is discharged from the spray header of the tank; 29. and a third spray pump.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

Referring to fig. 1-2, a wastewater outlet of an electrophoretic cell is connected to a wastewater inlet 1 of a solid-liquid centrifugal separator 5, the wastewater inlet 1 is provided with a first manual valve 2, the wastewater inlet 1 supplies water to the solid-liquid centrifugal separator 5 through a first water pump 3, a water outlet of the first water pump 3 is connected to a hydraulic self-rotating spray head 54 of the solid-liquid centrifugal separator 5, a first pressure gauge 4 is connected between the two to monitor water pressure in a pipeline, the solid-liquid centrifugal separator 5 primarily treats the wastewater of the electrophoretic cell to remove air dust, metal particles and other solid particles in the electrophoretic wastewater, the pretreated electrophoretic wastewater is discharged through a separation liquid outlet pipeline 510 of the solid-liquid centrifugal separator 5, the separation liquid outlet pipeline 510 is connected to a second water pump 7, a second manual valve 6 is connected between the two to control water flow, the second water pump 7 guides pretreatment liquid into subsequent steps, a part of the pretreatment liquid enters a pretreatment liquid tank through a pretreatment liquid outlet 9, a third manual valve 8 is arranged at the pretreatment liquid outlet 9 to control water flow of the pretreatment liquid, and the pretreatment liquid entering the pretreatment liquid tank can be sprayed through a first spray pump 24 to clean a vehicle body through a first spray head 23. The pretreatment liquid is used for cleaning the car body for the first time, so that the content of impurities needing to be treated in the subsequent cleaning process can be effectively reduced, the pretreatment liquid obtained by the solid-liquid centrifugal separation device 5 is low in cost, and the cost can be effectively reduced.

The other part of pretreatment liquid enters a tubular ultrafilter 11 for treatment, the tubular ultrafilter 11 adopts parallel connection to improve the treatment efficiency, a fourth manual valve 12 is arranged in front of each branch pipeline inlet to control water flow and a second pressure gauge 10 to monitor water pressure, the tubular ultrafilter 11 can convey separated concentrated liquid back to the electrophoretic pool through a concentrated liquid backflow pipeline 17, the outlet of the tubular ultrafilter 11 leads treated ultrafiltrate into the subsequent step through a third water pump 13, a part of ultrafiltrate enters an ultrafiltrate water tank through an ultrafiltrate water outlet 21, a fifth manual valve 16 is arranged at the ultrafiltrate water outlet 21 to control water flow, and ultrafiltrate entering the ultrafiltrate water tank can pass through a second spray pump 26 and is sprayed and cleaned for the second time by an ultrafiltrate tank spray head 25.

The other part of ultrafiltrate passing through the third water pump 13 enters the EDRO device 15 for treatment, the EDRO device 15 also adopts parallel connection to improve the treatment efficiency, a sixth manual valve 19 is arranged in front of each branch pipeline inlet to control water flow and a third pressure gauge 18 to monitor water pressure, pure water obtained after treatment by the EDRO device 15 enters subsequent steps through a pure water outlet 14, a seventh manual valve 20 is arranged at the water outlet to control water flow, and the pure water is subjected to third spray cleaning on the vehicle body through a third spray pump 29 and a pure water outlet tank spray header 28.

The overflow valves 27 are sequentially connected among the pure water tank, the second super filter, the first super filter and the electrophoresis cell, so that liquid can finally flow back to the electrophoresis cell, and the recovery effect is effectively improved.

Referring to fig. 3 to 4, in the embodiment of the present invention, four supporting seats are connected to the lower portion of the fixed outer cylinder 51 of the solid-liquid centrifugal separation device 5, and are mounted on the base 22 through the supporting seats, and a waste residue discharging pipe 59 communicated with the inner cavity of the fixed outer cylinder 51 is disposed below the fixed outer cylinder for discharging residue; a supporting plate 516 is arranged on the bottom surface of the inner cavity of the fixed outer cylinder 51; the motor 512 is arranged on the supporting plate 516, the supporting plate 516 not only plays a role of fixing and supporting the motor 512, but also has a certain height around to surround the motor 512 to play a role of waterproof for the motor 512; the motor 512 is connected with a rotating drum transmission shaft 520 through a coupler 513, the rotating drum transmission shaft 520 is connected with a centrifugal rotating drum 514 to drive the centrifugal rotating drum 514 to rotate at a high speed, electrophoresis wastewater enters the centrifugal rotating drum 514 rotating at a high speed from a hydraulic self-rotating spray head 54, the wastewater can be quickly layered under the centrifugal action, solid particles can be close to the inner wall of the centrifugal rotating drum 514 and gradually attached to the inner wall, and liquid substances can be close to the rotating center and are discharged through a separation liquid outlet pipe 510. A waste residue outlet 517 is arranged at the lower part of the bottom surface of the centrifugal rotating drum 514, an electric control valve 518 is arranged on the waste residue outlet 517, and the electric control valve 518 is in a closed state except the slag scraping process.

In the embodiment of the invention, in order to facilitate later-stage maintenance, a second air cylinder 58 is vertically installed on the side wall of the fixed outer cylinder 51, a piston rod at the top end of the second air cylinder 58 is connected with the first rotating shaft 56, a T-shaped connecting rod 55 is rotatably connected to the first rotating shaft 56, one end of the T-shaped connecting rod 55, which is far away from the first rotating shaft 56, is connected with the automatically-opened upper cover 52 at the top of the fixed outer cylinder 51, the bottom end of the T-shaped connecting rod 55 is connected with the fixed outer cylinder 51 through the second rotating shaft 57, and when the piston rod of the second air cylinder 58 retracts, the automatically-opened upper cover 52 can be automatically opened around the second rotating shaft 57. The hydraulic self-rotating spray head 54, the separation liquid outlet pipe 510, the first cylinder 53 and the third cylinder 511 are all arranged on the automatic opening upper cover 52.

Referring to fig. 5 to 6, the hydraulic self-rotating nozzle 54 includes a first water-saving pipe, a second water-saving pipe and a third water-saving pipe which are sequentially arranged from bottom to top, a helical blade 548 is rotatably connected inside the first water-saving pipe, a shower pipe 541 is equidistantly arranged on a side surface of a bottom end of the third water-saving pipe, a nozzle is arranged on a bottom surface of the shower pipe 541, an outer portion of the first water-saving pipe is connected with a mounting seat 543 through a self-aligning ball bearing 544, the self-aligning ball bearing 544 is axially fixed with a shaft through a shaft shoulder and an elastic retaining ring 549, the mounting seat 543 is mounted at a center of the automatically opening upper cover 52 through bolts and is connected with four identical shower pipes 541, the first pipe 542 is connected with the second pipe 546 through a thread, a ring of springs 5410 and balls 5411 are mounted on an upper portion of the second pipe 546, a ring of grooves are formed on a lower portion of the third pipe 547, the second pipe 546 and the third pipe 547 are clamped into the grooves through the balls 5411 and connected with the first pipe, a loading and unloading ring 545 which can be inserted into the second pipe 546 and can be separated from the second pipe 546 when the loading and unloading ring are drawn out; when connecting the two, it is necessary to first make a circle of holes of the loading and unloading ring 545 opposite to the grooves of the third section of pipe 547, and then insert the second section of pipe 546 together so that the balls 5411 are engaged in the grooves of the third section of pipe 547.

Referring to fig. 7 to 8, a first cylinder 53 and a third cylinder 511 are symmetrically mounted on a fixed outer cylinder 51, an annular slag scraping knife 515 attached to and tangent to the inner wall of the centrifugal rotating cylinder 514 is disposed on the inner side of the centrifugal rotating cylinder 514, piston rods of the first cylinder 53 and the third cylinder 511 are respectively connected to a slag scraping knife connecting seat 519 on the upper surface of the annular slag scraping knife 515, a circle of flow guide cavity is disposed in the annular slag scraping knife 515, a water injection port 5152 communicated with the flow guide cavity is disposed at the top of the annular slag scraping knife 515, pressurized water supply is connected through a section of plastic hose, and water injection ports 5151 communicated with the flow guide cavity are distributed around the bottom surface of the annular slag scraping knife 515. When the solid matter accumulated on the inner wall of the centrifugal rotating cylinder 514 reaches a certain thickness, the control system gives a prompt, and simultaneously controls to stop water inflow and stop the motor 512, the first cylinder 53 and the third cylinder 511 start to work to push the annular slag scraping knife 515 to scrape slag along the inner wall of the centrifugal rotating cylinder 514 in uniform-speed vertical motion, and meanwhile, the water spray port 5151 can spray high-pressure water flow to wash the slag scraping part.

Referring to fig. 4, the waste residue and the cleaning solution generated in the residue scraping process enter the fixed outer cylinder 51 through the waste residue discharge port 517 and the electric control valve 518, and are discharged from the waste residue discharge pipe 59, after the waste residue is cleaned, the electric control valve 518 is closed, the annular residue scraping knife 515 returns to the initial position, and meanwhile, the solid-liquid centrifugal separation device 5 continues to feed water and starts the solid-liquid separation operation.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The method for recycling the automobile electrophoresis wastewater is characterized by comprising the following steps of:

a tubular ultrafilter treatment step: filtering the electrophoresis wastewater entering the tubular ultrafilter to remove particles with the diameter larger than nm in the electrophoresis wastewater, wherein the filtered electrophoresis raw paint can flow back to the electrophoresis cell through concentrated solution backflow, one part of the filtered electrophoresis raw paint passes through the pretreatment solution and is introduced into the ultrafiltration water tank, and the other part of the filtered electrophoresis raw paint enters the EDRO device;

and (3) filtering by an EDRO device: and treating the pretreatment liquid entering the EDRO device to obtain pure water after the treatment of the EDRO device.

2. The method for recycling the automobile electrophoresis wastewater according to claim 1, which is characterized in that: the pretreatment water tank is connected with a first spray pump, and pretreatment liquid is used for spraying and cleaning the body of the electrophoresis cell for the first time.

3. The device and the method for recycling the automobile electrophoresis wastewater as claimed in claim 2, wherein the device comprises: and the ultrafiltration water tank is connected with a second spray pump, and ultrafiltrate is used for carrying out secondary spray cleaning on the vehicle body yielding water from the second ultrafiltration tank.

4. The method for recycling the automobile electrophoresis wastewater according to claim 3, which is characterized in that: and the pure water obtained by the EDRO device is connected with a third spray pump, and the pure water is used for carrying out third spray cleaning on the vehicle body discharged from the pure water tank.

5. The method for recycling the automobile electrophoresis wastewater as recited in claim 4, wherein: overflow valves are sequentially connected among the pure water tank, the second ultra-filter tank, the first ultra-filter tank and the electrophoresis cell.

6. An automobile electrophoresis wastewater recycling device adopting the automobile electrophoresis wastewater recycling method according to any one of claims 1 to 5, characterized in that: solid-liquid centrifugal separation device has the automatic upper cover that opens and shuts including fixed urceolus, the top of fixed urceolus, and automatic opening and shutting is covered and is installed water conservancy autogyration shower nozzle and separation liquid outlet conduit, the first water pump of entry linkage on water conservancy autogyration shower nozzle top, separation liquid outlet conduit connects the second water pump, and the export of second water pump passes through a mouth of pipe of distributive pipe and connects preliminary treatment liquid delivery port, another mouth of pipe connecting pipe formula ultrafilter of distributive pipe, the exit linkage third water pump of tubular ultrafilter, the exit linkage ultrafiltrate delivery port of third water pump and the entry of EDRO device.

7. The recycling device for the electrophoresis waste water of the automobile according to claim 6, characterized in that: the vertical second cylinder that installs of lateral wall of fixed urceolus, the piston rod on second cylinder top is connected with first pivot, and rotatable coupling has a T type connecting rod in the first pivot, and the one end and the automatic opening upper cover that first pivot was kept away from to T type connecting rod are connected, and the bottom of T type connecting rod is passed through the second pivot and is connected with fixed urceolus.

8. The recycling device for the electrophoresis waste water of the automobile according to claim 7, characterized in that: the bottom surface of the fixed outer barrel is provided with a waste residue discharging pipe communicated with the inner cavity of the fixed outer barrel, the center of the bottom of the fixed outer barrel is provided with a motor, an output shaft at the top of the motor is connected with the centrifugal rotary barrel through a coupling, the center of the bottom surface of the centrifugal rotary barrel is in a boss shape, the bottom surface of the centrifugal rotary barrel is provided with a waste residue discharging port, the waste residue discharging port is provided with an electric control valve, and the bottom end of the separation liquid discharging pipe is provided with a filter screen and extends to the bottom of the inner cavity of the centrifugal rotary barrel.

9. The recycling device for the electrophoresis waste water of the automobile according to claim 8, characterized in that: the hydraulic self-rotating sprayer comprises a first water saving pipe, a second water saving pipe and a third water saving pipe which are sequentially arranged from bottom to top, wherein the inside of the first water saving pipe is rotatably connected with a helical blade, a spraying pipe is arranged on the side face of the bottom end of the third water saving pipe, the outside of the first water saving pipe is connected with a mounting seat through a self-aligning ball bearing, and the mounting seat is mounted at the center of an automatic opening upper cover through a bolt.

10. The recycling device for the automobile electrophoresis waste water according to the claim 9 is characterized in that: first cylinder and third cylinder are installed to the symmetry on the fixed urceolus, the inboard of centrifugation rotary drum is equipped with scrapes the sediment sword rather than the annular of inner wall laminating, and the piston rod of first cylinder and third cylinder scrapes the upper surface connection of sediment sword with the annular respectively, the annular is scraped and is had round water conservancy diversion chamber in the sediment sword, and the top of sediment sword is scraped to the annular is equipped with the water filling port with water conservancy diversion chamber intercommunication, and the bottom surface of sediment sword is scraped to the annular is around the water jet that distributes and lead the chamber intercommunication.