Lithium iron phosphate production wastewater recycling device and method

Abstract

The invention relates to the technical field of wastewater recycling, in particular to a lithium iron phosphate production wastewater recycling device and method.The lithium iron phosphate production wastewater recycling device comprises a treatment pond and a drainage pipe arranged in the treatment pond, a first mounting ring is fixedly mounted on the drainage pipe, and a first filtering assembly is arranged on the first mounting ring; a second filtering assembly is arranged on the first filtering assembly, and both the first filtering assembly and the second filtering assembly can filter large particles in precipitates; the first filtering assembly comprises a second mounting ring arranged on the first mounting ring and a filtering ring fixed on the second mounting ring, and a plurality of groups of filtering holes are formed in the filtering ring; the second filter assembly comprises a third mounting ring arranged on the filter ring, a fourth mounting ring arranged on the third mounting ring and a filter screen fixed on the fourth mounting ring, and the fourth mounting ring is connected with a plugging ring in a sliding manner. The drainage pipe has the effect of reducing blockage of the drainage pipe.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of wastewater recovery, in particular to a lithium iron phosphate production wastewater recovery device and method. BACKGROUND

[0002] With the explosive growth of new energy vehicles and energy storage industries, the large-scale production of lithium iron phosphate positive materials has derived a large amount of high-pollution wastewater. Such wastewater has the characteristics of high salt content, high concentration of phosphate and lithium ions, and traditional single treatment technology has been difficult to meet the dual needs of environmental protection discharge and resource recycling. In recent years, the innovative technology path based on the concept of green and sustainable development has become the research focus - through the "separate quality treatment + resource" mode, chemical precipitation coupled with membrane separation technology is used to realize efficient recovery of lithium and phosphorus, MVR evaporation crystallization is used to realize the separation of by-products such as sodium sulfate into industrial raw materials, and biological treatment is used to reduce the organic load, so that the wastewater can be recycled after deep purification. The technical system not only solves the industry bottlenecks of high-salt wastewater scaling and blocking, low separation efficiency of lithium and phosphorus, but also converts the originally environmentally risky industrial wastewater into renewable resources with economic value, providing key technical support for the circular economy of the lithium battery industry.

[0003] For example, the Chinese patent document with the publication number CN118239635B discloses a self-cleaning sewage treatment equipment, which comprises a self-cleaning sewage treatment equipment, a shell, a water inlet pipe and a water outlet pipe arranged on the front side of the shell, a sedimentation tank, an aeration tank, a reaction tank and a clear water tank arranged in the shell from left to right, the upper end of the sedimentation tank being connected with the water inlet pipe, the lower end of the aeration tank being provided with an aeration pipe, the inside of the reaction tank being provided with a membrane bioreactor, the upper end of the clear water tank being connected with the water outlet pipe, a communication water pipe being arranged between the sedimentation tank and the aeration tank, between the aeration tank and the reaction tank, and between the reaction tank and the clear water tank, a water pump being connected in series with the middle part of the communication water pipe, a fan being arranged on the rear side of the shell, the air outlet of the fan being connected with the air inlet of the aeration pipe, the water inlet end of the communication water pipe being lower than the water outlet end, a self-cleaning mechanism being arranged in the sedimentation tank, the self-cleaning mechanism comprising a V-shaped plate, a spiral pushing column and a blowdown pipe, the V-shaped plate being arranged at the lower end of the sedimentation tank, the spiral pushing column being located in the blowdown pipe, the upper end of the blowdown pipe being provided with an opening, the V-shaped plate being connected to the two sides of the opening, the front end of the blowdown pipe extending out of the shell, and a blowdown valve being arranged on the blowdown pipe. When the large particles of sewage slide downward in the sedimentation tank, they are guided by the V-shaped plate and concentrated in the blowdown pipe, and the first driving motor can discharge the sewage from the front end of the blowdown pipe.

[0004] In the related art, the sediment in the shell can be discharged through the drain pipe, and after the lithium iron phosphate production wastewater is treated by the treatment tank, the supernatant is above the treatment tank, the sediment and sewage are below the treatment tank, and turbid sewage exists between the supernatant and the sediment. After a long time of treatment, the sediment in the treatment tank gradually increases. Since the sediment has a certain pollution, it cannot be directly discharged from the bottom drain pipe of the treatment tank. Instead, after the supernatant of the treatment tank is discharged, the staff needs to clean the sediment at the bottom by cleaning equipment.

[0005] In the process of cleaning the sediment, in order to reduce the water content of the sediment, the turbid sewage on the upper layer of the sediment needs to be discharged. When discharging the turbid sewage on the upper layer of the sediment, a drain pipe is arranged on the treatment tank, a filter screen is installed on the drain pipe, and then the turbid sewage on the upper layer of the sediment is discharged through the drain pipe, so that the staff can clean the sediment at the bottom by the cleaning equipment. However, in the cleaning process, the sediment will block the filter screen on the drain pipe, so that the turbid sewage above the sediment in the treatment tank cannot be completely discharged, causing the sediment at the bottom of the treatment tank to be very inconvenient to clean. SUMMARY

[0006] The present application provides a lithium iron phosphate production wastewater recycling device and method, aiming to solve the problem of blockage of the drain pipe in the related art.

[0007] First aspect: The lithium iron phosphate production wastewater recycling device provided by the present application adopts the following technical scheme: A lithium iron phosphate production wastewater recycling device, comprising a treatment tank and a drain pipe arranged in the treatment tank, a first mounting ring is fixedly installed on the drain pipe, a first filter assembly is arranged on the first mounting ring, a second filter assembly is arranged on the first filter assembly, and the first filter assembly and the second filter assembly can filter large particles in the sediment; the first filter assembly comprises a second mounting ring arranged on the first mounting ring and a filter ring fixed on the second mounting ring, a plurality of filter holes are formed in the filter ring; the second filter assembly comprises a third mounting ring arranged on the filter ring, a fourth mounting ring arranged on the third mounting ring, and a filter screen fixed on the fourth mounting ring, a plurality of communication holes are formed in the blocking ring, and a plurality of communication holes are formed in the blocking ring. The surface of the filter ring is provided with a blocking strip for blocking the plurality of communication holes on the blocking ring. When the blocking ring is blocked, the turbid sewage can only enter the drain pipe through the filter screen.

[0008] By adopting the technical scheme, when the sediment in the treatment tank needs to be cleaned, the supernatant in the upper layer of the treatment tank is first discharged, and after the supernatant is discharged, the turbid sewage in the middle and the sediment in the lower layer remain in the treatment tank. Before the sediment is cleaned, the turbid sewage in the treatment tank needs to be discharged, the valve on the drain pipe is opened, and the turbid sewage is discharged from the treatment tank through the drain pipe. During the drainage process, since the filter ring is blocked by the blocking ring, the turbid sewage can only enter the drain pipe from the filter screen, and part of the impurities will adhere to the surface of the filter screen, causing the filter screen to be blocked. After the filter screen is blocked, under the action of water pressure, the filter screen and the fourth mounting ring are moved, the fourth mounting ring drives the blocking ring to rotate, the blocking strip no longer blocks the communication hole on the blocking ring, and the sewage in the treatment tank can enter the drain pipe through the communication hole and the filter hole, thereby reducing the blockage of the drain pipe and improving the drainage efficiency.

[0009] Optionally, the third mounting ring is provided with a fixing assembly for mounting the fourth mounting ring and the filter screen on the third mounting ring, the fixing assembly comprises a moving block fixed on the fourth mounting ring, a fixed spring abutting against the filter screen, and a fixed ring fixed on the third mounting ring, and one end of the fixed spring away from the filter screen abuts against the fixed ring.

[0010] By adopting the technical scheme, after the filter screen is blocked, since the filter ring is blocked by the blocking ring, the turbid sewage in the treatment tank pushes the filter screen and the fourth mounting ring to move, the fourth mounting ring drives the blocking ring to move during the movement of the fourth mounting ring, the fixed spring is in a compressed state, the communication hole on the blocking ring is opened, and then the turbid sewage enters the drain pipe through the communication hole and the filter hole. After the filter screen is cleaned, the fixed spring pushes the fourth mounting ring and the filter screen to reset.

[0011] Optionally, a plurality of groups of the filter holes are arranged at intervals in the circumferential direction of the filter ring, each group is provided with a plurality of filter holes, a straight line where the centers of the plurality of filter holes are located is arranged at an angle with respect to the axis of the filter ring, and a straight line where the centers of the plurality of communication holes are located is arranged in parallel with the straight line where the centers of the plurality of filter holes are located.

[0012] By adopting the technical scheme, since the straight line where the centers of the plurality of communication holes are located is arranged at an angle with respect to the axis of the filter ring, during the movement of the blocking ring, the communication hole and the blocking strip can be arranged in dislocation, so that the sewage in the treatment tank can enter between the filter ring and the blocking ring through the communication hole, and finally enter the drain pipe through the filter hole.

[0013] Optionally, a plurality of impeller blades are fixedly installed on the inner wall of the filter ring, the plurality of impeller blades are arranged at intervals along the circumference of the filter ring, the impeller blades gradually incline towards the first mounting ring axis in a direction away from the filter screen, the filter screen is provided with a connecting assembly, the connecting assembly is provided with a cleaning assembly for cleaning impurities attached to the filter screen, and the connecting assembly is used to connect the cleaning assembly and the impeller blades.

[0014] By adopting the above technical scheme, when the filter screen is blocked, the filter screen moves with the fourth mounting ring and the blocking ring, the blocking ring is opened, sewage enters from the communication hole, flows into the filter ring through the filter hole, and then drives the impeller blades on the filter ring to rotate, the impeller blades drive the cleaning assembly to rotate in the process of rotating, and the cleaning assembly cleans the surface of the filter screen.

[0015] Optionally, the connecting assembly comprises a moving ring slidingly connected to the inner wall of the drain pipe, a connecting ring rotatably connected to the moving ring, and a connecting groove opened in the connecting ring, one end of the impeller blade is located in the connecting groove, and a blocking sleeve is fixedly installed on the connecting ring and used to limit turbid sewage flowing from the filter hole.

[0016] Optionally, the cleaning assembly comprises a cleaning rod fixed to the connecting ring and a cleaning scraper fixed to the cleaning rod, the cleaning rod penetrates through the filter screen, and the cleaning scraper abuts against the surface of the filter screen.

[0017] By adopting the above technical scheme, in the process of rotating the filter ring, the connecting ring is driven to rotate, the cleaning rod is driven to rotate by the connecting ring, the cleaning scraper is driven to rotate in the process of rotating the cleaning rod, the cleaning scraper cleans the impurities attached to the surface of the filter screen, and thus the blockage of the filter screen is reduced.

[0018] Optionally, an installation groove is opened in the inner wall of the drain pipe, a clamping assembly is arranged in the installation groove, the clamping assembly comprises a reset spring arranged in the installation groove and a clamping block fixed to the reset spring, one end of the reset spring away from the clamping block is fixed to the inner wall of the installation groove, the reset spring makes the clamping block protrude from the inner wall of the drain pipe, a clamping surface for abutting against the side surface of the moving ring is arranged on the clamping block, and the clamping surface is arranged obliquely.

[0019] By adopting the above technical scheme, the filter screen drives the fourth mounting ring to move, the fourth mounting ring and the filter screen drive the cleaning rod to move, the cleaning rod drives the moving ring to move, the moving ring abuts against the clamping surface in the process of moving, and then the clamping block is driven to move into the installation groove, and the reset spring can drive the clamping block to clamp the moving moving ring, so that the sewage can enter from the communication hole.

[0020] Optionally, the third mounting ring is provided with a moving groove, the fourth mounting ring is fixedly provided with a moving block, the moving block is slidingly connected in the moving groove, the plugging ring is fixedly provided with a pushing ring, the moving block abuts against the surface of the pushing ring, and the moving block pushes the pushing ring to move when the moving block moves; the plugging ring is provided with a pushing block, the first mounting ring is provided with a pushing groove, the pushing groove is provided in an arc shape, and the pushing block slides in the pushing groove.

[0021] By adopting the above technical scheme, since the pushing groove is provided in an arc shape, the plugging ring is rotated on the first mounting ring in the moving process of the pushing block, the communication hole on the plugging ring is corresponded with the filter hole on the filter ring, the water inflow rate is improved.

[0022] Optionally, the second mounting ring comprises a mounting portion and a connecting portion, both of which are provided in an annular shape, the mounting portion is fixed on the end face of the filter ring, the connecting portion is fixed on the mounting portion, and the outer diameter of the connecting portion is smaller than that of the mounting portion, the connecting portion is provided with an external thread, and the first mounting ring is provided with an internal thread, so that the connecting portion is threadedly connected on the first mounting ring.

[0023] By adopting the above technical scheme, the filter ring is fixed on the first mounting ring through the thread, and then the filter ring can be conveniently replaced.

[0024] Second aspect: A method for recycling lithium iron phosphate production wastewater, comprising the following steps: S1: The filter ring is plugged by the plugging ring, and the turbid sewage in the treatment tank flows into the drain pipe through the filter screen; S2: When the filter screen is blocked, the turbid sewage pushes the filter screen and the fourth mounting ring to move, the first mounting ring drives the plugging ring to move, the plugging ring is dislocated with the plugging strip, and the communication hole is opened; S3: The sewage flowing out of the filter hole pushes the impeller blade and the filter ring to rotate, and the filter ring drives the cleaning rod and the cleaning scraper to rotate.

[0025] By adopting the above technical solution, when discharging the turbid sewage in the middle of the treatment tank, the valve on the drain pipe is opened, and the sewage enters the drain pipe through the filter screen. During the drainage process, impurities will adhere to the surface of the filter screen, which will cause the filter screen to become clogged during long-term use. When the filter screen is clogged, due to the moving pressure of the sewage, the pressure of the sewage will push the clogged filter screen and the fourth mounting ring to move. The movement of the fourth mounting ring will drive the moving block to move, and the moving block will drive the sealing ring to rotate in the moving groove, so that the connecting hole is opened. At this time, the sewage in the treatment tank can enter the drain pipe through the connecting hole and the filter screen. During the sewage entry process, it will drive the impeller to rotate, the impeller to rotate, the filter ring to rotate, the filter ring to rotate, the connecting ring to rotate, the cleaning rod to rotate, and the cleaning rod to rotate the cleaning scraper. The cleaning scraper cleans the impurities on the surface of the filter screen.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. When the filter screen becomes clogged, the water pressure will push the filter screen and the fourth mounting ring to move. The fourth mounting ring will drive the sealing ring to rotate, and the sealing strip will no longer block the connecting hole on the sealing ring. The sewage in the treatment tank can enter the drain pipe through the connecting hole and the filter hole, thereby reducing the blockage of the drain pipe and improving the drainage efficiency. 2. After the filter screen is blocked, the filter screen will move with the fourth mounting ring and the blocking ring. The blocking ring will be opened, and sewage will enter through the connecting hole. The sewage will flow into the filter ring through the filter hole, and then drive the impeller on the filter ring to rotate. During the rotation of the impeller, the cleaning component will be driven, and the cleaning component will clean the surface of the filter screen. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0028] Figure 2 This is a cross-sectional view of the processing pool according to an embodiment of this application.

[0029] Figure 3 This is a cross-sectional view of the drain pipe according to an embodiment of this application.

[0030] Figure 4 This is a schematic diagram of the sealing ring and filter ring structure according to an embodiment of this application.

[0031] Figure 5 This is a cross-sectional view of the sealing ring and filter ring structure according to an embodiment of this application.

[0032] Figure 6 This is a cross-sectional view of the blocking sleeve according to an embodiment of this application.

[0033] Figure 7 This is a schematic diagram of the filter structure according to an embodiment of this application.

[0034] Figure 8 is a schematic diagram of the connecting ring structure of the embodiment of the application.

[0035] Figure 9 is a schematic diagram of the filter ring and impeller blade structure of the embodiment of the application.

[0036] Figure 10 is a schematic diagram of the blocking strip and filter hole structure of the embodiment of the application.

[0037] Reference signs: 01, treatment tank; 02, drain pipe; 03, first mounting ring; 1, first filter assembly; 11, second mounting ring; 12, filter ring; 13, filter hole; 2, second filter assembly; 21, third mounting ring; 22, fourth mounting ring; 23, filter screen; 3, fixing assembly; 31, moving block; 32, fixed spring; 33, fixed ring; 34, moving groove; 4, blocking ring; 41, communication hole; 42, blocking strip; 43, impeller blade; 44, blocking sleeve; 45, mounting groove; 5, connecting assembly; 51, moving ring; 52, connecting ring; 53, connecting groove; 6, cleaning assembly; 61, cleaning rod; 62, cleaning scraper; 7, clamping assembly; 72, clamping block; 73, clamping surface; 8, pushing block; 81, pushing groove; 82, pushing ring. DETAILED DESCRIPTION

[0038] The following will be described in detail Figures 1-10 The application is further described in detail.

[0039] First aspect: The embodiment of the application discloses a lithium iron phosphate production wastewater recycling device. Referring to Figures 1 to 4 A lithium iron phosphate production wastewater recycling device includes a treatment tank 01 and a drain pipe 02 arranged in the treatment tank 01, a valve is arranged on the drain pipe 02, a first mounting ring 03 is fixedly installed on the drain pipe 02, a first filter assembly 1 is arranged on the first mounting ring 03, a second filter assembly 2 is arranged on the first filter assembly 1, and the first filter assembly 1 and the second filter assembly 2 can filter large particles in the precipitate, so that turbid sewage flows out of the drain pipe 02.

[0040] Referring to Figures 1 to 4 One end of the drain pipe 02 is in the treatment tank 01, and the other end extends outside the treatment tank 01, the end of the drain pipe 02 extending out of the treatment tank 01 is provided with a connecting pipe, and the connecting pipe is arranged downward, which facilitates the discharge of turbid sewage in the treatment tank 01.

[0041] Referring to Figures 1 to 4, the first filter assembly 1 comprises a second mounting ring 11 and a filter ring 12, the filter ring 12 is arranged along the circumference of the drain pipe 02, and the outer diameter of the filter ring 12 is greater than the outer diameter of the drain pipe 02, and the inner diameter of the filter ring 12 is greater than the inner diameter of the drain pipe 02; a plurality of filter holes 13 are formed in the filter ring 12, the plurality of filter holes 13 are arranged at intervals along the circumference of the filter ring 12, and each group is provided with a plurality of filter holes 13, and the straight line where the centers of the plurality of filter holes 13 are located is arranged at an angle with the axis of the filter ring 12; the second mounting ring 11 is arranged at one end of the filter ring 12 close to the first mounting ring 03.

[0042] Referring to Figures 1 to 4 , the second mounting ring 11 comprises a mounting portion and a connecting portion, both of which are arranged in a ring structure, the mounting portion is fixed on the end face of the filter ring 12, and the connecting portion is rotatable on the mounting portion, and the outer diameter of the connecting portion is smaller than that of the mounting portion, an external thread is arranged on the connecting portion, and an internal thread is arranged on the first mounting ring 03, so that the connecting portion is threadedly connected to the first mounting ring 03, and at this time the filter ring 12 is fixed on the first mounting ring 03.

[0043] Referring to Figures 1 to 4 , the second filter assembly 2 is arranged at one end of the filter ring 12 away from the first mounting ring 03, and the second filter assembly 2 comprises a third mounting ring 21 rotatably connected to the filter ring 12, a fourth mounting ring 22 arranged on the third mounting ring 21, and a filter screen 23 fixed on the fourth mounting ring 22, and the filter screen 23 is arranged in a circular shape.

[0044] Referring to Figures 3 to 6 , a fixing assembly 3 is arranged on the third mounting ring 21, and the fixing assembly 3 is used for mounting the fourth mounting ring 22 and the filter screen 23 on the third mounting ring 21. The fixing assembly 3 comprises a moving block 31 fixed on the fourth mounting ring 22, a fixed spring 32 abutting against the filter screen 23, and a fixing ring 33 fixed on the third mounting ring 21, one end of the fixed spring 32 away from the filter screen 23 abuts against the fixing ring 33, in the embodiment, a fixing screw is arranged on the moving block 31, the moving block 31 is fixed on the fourth mounting ring 22 through the fixing screw, and a moving groove 34 is formed in the third mounting ring 21, the moving groove 34 is arranged along the axis length of the third mounting ring 21, and the moving block 31 is arranged in the moving groove 34, by pushing the filter screen 23, the fourth mounting ring 22 is moved by the filter screen 23, the moving block 31 on the fourth mounting ring 22 slides in the moving groove 34, and the fixed spring 32 is in a compressed state; in the initial state, the fixed spring 32 is in a natural length.

[0045] Referring to Figures 3 to 6A plurality of groups of communication holes 41 are formed on the blocking ring 4, and each group of communication holes 41 is provided with a plurality of communication holes 41. The straight line where the centers of the plurality of communication holes 41 are located is parallel to the straight line where the centers of the plurality of filter holes 13 are located. Meanwhile, a blocking strip 42 is arranged on the surface of the filter ring 12, and the blocking strip 42 is used to block the plurality of groups of communication holes 41 on the blocking ring 4. A pushing ring 82 is fixedly installed on the blocking ring 4, and the moving block 31 abuts against the surface of the pushing ring 82. When the moving block 31 moves, the pushing ring 82 is pushed to move. The filter screen 23 is pushed, and the fixed spring 32 is compressed. The filter screen 23 drives the fourth installation ring 22 and the moving block 31 to move. The moving block 31 slides in the moving groove 34. Then, the blocking strip 42 no longer blocks the communication holes 41. At this time, the sewage in the treatment tank 01 enters the filter ring 12 and the blocking ring 4 through the communication holes 41. The sewage between the filter ring 12 and the blocking ring 4 enters the filter ring 12 through the filter holes 13. Finally, the sewage enters the drain pipe 02 from the filter ring 12. In the initial state, the blocking ring 4 is in the blocking state. The turbid sewage in the treatment tank 01 can only enter from the filter screen 23.

[0046] In the embodiment, a pushing block 8 is arranged on the blocking ring 4, and a pushing groove 81 is formed on the first installation ring 03. The pushing groove 81 is arranged in an arc shape. The pushing block 8 slides in the pushing groove 81. A plurality of pushing grooves 81 are arranged along the circumference of the first installation ring 03. Since the pushing groove 81 is arranged in an arc shape, during the rotation of the filter screen 23 and the fourth installation ring 22, the pushing block 8 on the blocking ring 4 rotates on the first installation ring 03 (the installation part rotates on the rotating part). The communication holes 41 on the blocking ring 4 correspond to the filter holes 13 on the filter ring 12. Then, it is more convenient for the turbid sewage to enter the filter ring 12.

[0047] Referring to Figures 3 to 6 and Figure 9 , Figure 10 A plurality of impeller blades 43 are fixedly installed on the inner wall of the filter ring 12. The plurality of impeller blades 43 are arranged at intervals along the circumference of the filter ring 12. The impeller blades 43 gradually incline towards the axis of the first installation ring 03 in a direction away from the filter screen 23. A connecting assembly 5 is arranged on the filter screen 23. A cleaning assembly 6 is arranged on the connecting assembly 5. The cleaning assembly 6 is used to clean the impurities attached to the filter screen 23. The connecting assembly 5 is used to connect the cleaning assembly 6 and the impeller blades 43. When the filter screen 23 is not blocked by the sediment, the blocking ring 4 is blocked by the blocking strip 42. The turbid sewage in the treatment tank 01 can only pass through the filter screen 23. At this time, the turbid sewage is filtered through the filter screen 23. The turbid sewage enters the drain pipe 02 through the filter screen 23. Then, the turbid sewage is discharged from the treatment tank 01 through the drain pipe 02.

[0048] Referring toFigures 5 to 10 When the filter screen 23 is blocked by the precipitate in the treatment tank 01, the filter screen 23 is also blocked by the blocking ring 4, at this time, the turbid sewage in the treatment tank 01 pushes the blocked filter screen 23 to move, the filter screen 23 drives the moving block 31 to move in the moving groove 34, the moving block 31 drives the blocking ring 4 to move, the communication holes 41 on the blocking ring 4 are arranged in a staggered manner with the blocking strips 42, at this time, the blocking strips 42 no longer block the communication holes 41, the sewage in the treatment tank 01 enters between the filter ring 12 and the blocking ring 4 through the communication holes 41, and the sewage between the filter ring 12 and the blocking ring 4 enters the filter ring 12 through the filter holes 13 and finally enters the drain pipe 02 from the filter ring 12.

[0049] With reference to Figures 5 to 10 The connecting assembly 5 comprises a moving ring 51 slidably connected to the inner wall of the drain pipe 02, a connecting ring 52 rotatably connected to the moving ring 51, and a connecting groove 53 formed in the connecting ring 52, one end of the impeller blade 43 is located in the connecting groove 53, and a blocking sleeve 44 is fixedly installed on the connecting ring 52, the blocking sleeve 44 is used for limiting the turbid sewage flowing through the filter holes 13, at this time, the turbid sewage flowing through the filter holes 13 can drive the impeller blade 43 to rotate, the impeller blade 43 drives the filter ring 12 to rotate in the process of rotating, and the connecting ring 52 is connected to the impeller blade 43 through the connecting groove 53, so that the connecting ring 52 is driven to rotate in the process of rotating of the impeller blade 43.

[0050] After the filter screen 23 is blocked, the turbid sewage cannot pass through the filter screen 23, the water pressure drives the filter screen 23 to move, the filter screen 23 and the fourth mounting ring 22 and the moving block 31 move, and then drive the blocking ring 4 to move, the moved blocking ring 4 is not blocked by the blocking strip 42, the turbid sewage enters the filter ring 12 through the communication holes 41 and the filter holes 13, and impacts the impeller blade 43, so that the impeller blade 43 drives the filter ring 12 to rotate.

[0051] With reference to Figures 5 to 10 The cleaning assembly 6 comprises a cleaning rod 61 fixed to the connecting ring 52 and a cleaning scraper 62 fixed to the cleaning rod 61, the cleaning rod 61 penetrates through the filter screen 23, and the cleaning scraper 62 abuts against the surface of the filter screen 23, in the process of rotating of the impeller blade 43 driving the filter ring 12, the impeller blade 43 also drives the connecting ring 52 to rotate, the connecting ring 52 drives the cleaning rod 61 to rotate, the cleaning rod 61 drives the cleaning scraper 62 to rotate, and the cleaning scraper 62 can clean the impurities on the surface of the filter screen 23.

[0052] When the filter screen 23 is blocked, the turbid sewage enters the gap between the blocking ring 4 and the filter ring 12 through the communication hole 41, and then enters the filter ring 12 through the filter hole 13. Due to the effect of the blocking sleeve 44, the turbid sewage entering the filter ring 12 will flow along the inclined surface direction of the impeller blade 43, and at the same time, the turbid sewage will flow towards the direction close to the filter screen 23. During the reverse flow process, the filter screen 23 can be reversely washed, thereby achieving the purpose of further cleaning the filter screen 23.

[0053] With reference to Figures 5 to 10 An installation groove 45 is formed on the inner wall of the drain pipe 02, and a clamping assembly 7 is arranged in the installation groove 45. The clamping assembly 7 is used for clamping the moving ring 51, and at this time, the positions of the connecting ring 52 and the cleaning assembly 6 arranged on the connecting ring 52 can be limited. The clamping assembly 7 comprises a reset spring (not shown in the figure) arranged in the installation groove 45 and a clamping block 72 fixed on the reset spring. One end of the reset spring away from the clamping block 72 is fixed on the inner wall of the installation groove 45. The reset spring makes the clamping block 72 protrude from the inner wall of the drain pipe 02. A clamping surface 73 is arranged on the clamping block 72 and is inclined. During the movement of the filter screen 23 driving the fourth installation ring 22, the cleaning rod 61 drives the connecting ring 52 to move simultaneously. During the movement of the connecting ring 52, the moving ring 51 is pushed to slide on the inner wall of the drain pipe 02, so that the side surface of the moving ring 51 abuts against the clamping surface 73, and at the same time, the clamping block 72 moves into the installation groove 45, and the reset spring is gradually compressed. Through the arrangement of the reset spring, the moving ring 51 can be clamped, and at this time, the positions of the cleaning rod 61, the connecting ring 52 and the filter screen 23 can be limited.

[0054] The implementation principle of the lithium iron phosphate production wastewater recycling device is that after the sewage in the treatment tank 01 is treated, upper clear liquid, turbid sewage in the middle and sediment at the bottom are obtained. When the sediment at the bottom of the treatment tank 01 needs to be cleaned, the upper clear liquid is discharged first. After the upper clear liquid in the upper layer is discharged, the turbid sewage in the middle is discharged through the drain pipe 02. After the turbid sewage in the middle is discharged, the worker cleans the sediment at the bottom of the treatment tank 01 by using the cleaning device.

[0055] When the turbid sewage is discharged from the drain pipe 02, the turbid sewage cannot enter between the blocking ring 4 and the filtering ring 12 through the communication hole 41 because the blocking ring 4 is blocked by the blocking strip 42, and the turbid sewage can only enter the drain pipe 02 from the filter screen 23. During the drainage process, because impurities exist in the turbid sewage, part of the impurities will adhere to the surface of the filter screen 23, and the filter screen 23 is prone to be blocked in a long-term drainage process. After the filter screen 23 is blocked, the turbid sewage will push the filter screen 23 and the fourth mounting ring 22 to move under the pressure of the turbid sewage, and the fourth mounting ring 22 will drive the moving block 31 to move in the moving groove 34 during the movement of the fourth mounting ring 22. The moving block 31 will push the blocking ring 4 to move during the movement of the moving block 31. Because the pushing groove 81 is arranged in an arc structure, the blocking ring 4 will rotate during the movement of the blocking ring 4, and then the blocking strip 42 no longer blocks the communication hole 41. The turbid sewage enters between the blocking ring 4 and the filtering ring 12 through the communication hole 41, and enters the filtering ring 12 through the filtering hole 13 on the filtering ring 12.

[0056] Because the filtering ring 12 is provided with the impeller blade 43, the sewage flowing out of the filtering hole 13 falls on the surface of the impeller blade 43, and the sewage flows downward along the inclined surface of the impeller blade 43, and then flows to the blocking sleeve 44 and moves to the direction close to the filter screen 23 on the outside of the blocking sleeve 44. On the one hand, the sewage will impact the filter screen 23 and clean the filter screen 23, and on the other hand, the sewage will enter the blocking sleeve 44 and enter the drain pipe 02 through the blocking sleeve 44.

[0057] During the process that the sewage flowing out of the filtering hole 13 falls on the surface of the impeller blade 43, the impeller blade 43 will be driven to rotate, the filtering ring 12 will be driven to rotate by the impeller blade 43, the connecting ring 52 will be driven to rotate by the filtering ring 12, the cleaning rod 61 will be driven to rotate by the connecting ring 52, and the cleaning scraper 62 will be driven to rotate by the cleaning rod 61. The impurities adhering to the surface of the filter screen 23 are cleaned by the cleaning scraper 62, so as to reduce the blockage of the drain pipe 02 and improve the drainage efficiency.

[0058] The second aspect is: A method for recycling wastewater produced in lithium iron phosphate production, comprising the following steps: S1: The filtering ring 12 is blocked by the blocking ring 4, and the turbid sewage in the treatment tank 01 flows into the drain pipe 02 through the filter screen 23; S2: When the filter screen 23 is blocked, the turbid sewage pushes the filter screen 23 and the fourth mounting ring 22 to move, the first mounting ring 03 drives the blocking ring 4 to move, the blocking ring 4 is dislocated with the blocking strip 42, and the communication hole 41 is opened; S3: The sewage flowing out of the filtering hole 13 drives the impeller blade 43 and the filtering ring 12 to rotate, and the filtering ring 12 drives the cleaning rod 61 and the cleaning scraper 62 to rotate.

[0059] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: all equivalent changes made according to the structure, shape, principle of the present application should be covered in the protection scope of the present application.

Claims

1. A device for recycling wastewater from lithium iron phosphate production, comprising a treatment tank (01) and a drain pipe (02) disposed within the treatment tank (01), characterized in that: A first mounting ring (03) is fixedly installed on the drain pipe (02). A first filter assembly (1) is provided on the first mounting ring (03), and a second filter assembly (2) is provided on the first filter assembly (1). Both the first filter assembly (1) and the second filter assembly (2) can filter large particles in the sediment. The first filter assembly (1) includes a second mounting ring (11) provided on the first mounting ring (03) and a filter ring (12) fixed on the second mounting ring (11). The filter ring (12) has multiple sets of filter holes (13). The second filter assembly (2) includes... The filter ring (12) includes a third mounting ring (21) and a fourth mounting ring (22) on the third mounting ring (21) and a filter screen (23) fixed on the fourth mounting ring (22). A sealing ring (4) is slidably connected to the fourth mounting ring (22). The sealing ring (4) has multiple sets of connecting holes (41). The surface of the filter ring (12) is provided with sealing strips (42) for sealing the multiple sets of connecting holes (41) on the sealing ring (4). When the sealing ring (4) is sealed, the turbid sewage can only enter the drain pipe (02) through the filter screen (23).

2. The lithium iron phosphate production wastewater recycling device according to claim 1, characterized in that: A fixing component (3) is provided on the third mounting ring (21). The fixing component (3) is used to install the fourth mounting ring (22) and the filter screen (23) on the third mounting ring (21). The fixing component (3) includes a moving block (31) fixed on the fourth mounting ring (22), a fixing spring (32) abutting against the filter screen (23), and a fixing ring (33) fixed on the third mounting ring (21). The end of the fixing spring (32) away from the filter screen (23) abuts against the fixing ring (33).

3. The lithium iron phosphate production wastewater recycling device according to claim 1, characterized in that: Multiple sets of filter holes (13) are arranged at intervals along the circumference of the filter ring (12), and each set is provided with multiple filter holes (13). The straight line where the center of the multiple filter holes (13) is located is set at an angle to the axis of the filter ring (12); the straight line where the center of the multiple connecting holes (41) is located is parallel to the straight line where the center of the multiple filter holes (13) is located.

4. The lithium iron phosphate production wastewater recycling device according to claim 2, characterized in that: Multiple impeller blades (43) are fixedly installed on the inner wall of the filter ring (12). The multiple impeller blades (43) are arranged at intervals along the circumference of the filter ring (12). The impeller blades (43) gradually tilt towards the axis of the first mounting ring (03) in the direction away from the filter screen (23). A connecting component (5) is provided on the filter screen (23). A cleaning component (6) is provided on the connecting component (5) for cleaning impurities attached to the filter screen (23). The connecting component (5) is used to connect the cleaning component (6) and the impeller blades (43).

5. The lithium iron phosphate production wastewater recycling device according to claim 4, characterized in that: The connecting assembly (5) includes a movable ring (51) slidably connected to the inner wall of the drain pipe (02) and a connecting ring (52) rotatably connected to the movable ring (51) and a connecting groove (53) opened on the connecting ring (52). One end of the impeller blade (43) is located in the connecting groove (53). A blocking sleeve (44) is fixedly installed on the connecting ring (52). The blocking sleeve (44) is used to limit the turbid sewage flowing down from the filter hole (13).

6. The lithium iron phosphate production wastewater recycling device according to claim 5, characterized in that: The cleaning assembly (6) includes a cleaning rod (61) fixed on a connecting ring (52) and a cleaning scraper (62) fixed on the cleaning rod (61). The cleaning rod (61) passes through the filter screen (23), and the cleaning scraper (62) abuts against the surface of the filter screen (23).

7. The lithium iron phosphate production wastewater recycling device according to claim 6, characterized in that: An installation groove (45) is provided on the inner wall of the drain pipe (02). A clamping assembly (7) is provided in the installation groove (45). The clamping assembly (7) includes a return spring provided in the installation groove (45) and a clamping block (72) fixed on the return spring. One end of the return spring away from the clamping block (72) is fixed on the inner wall of the installation groove (45). The return spring causes the clamping block (72) to protrude from the inner wall of the drain pipe (02). A clamping surface (73) for abutting against the side of the moving ring (51) is provided on the clamping block (72). The clamping surface (73) is inclined.

8. The lithium iron phosphate production wastewater recycling device according to claim 2, characterized in that: The third mounting ring (21) has a moving groove (34), the moving block (31) is slidably connected in the moving groove (34), the sealing ring (4) is fixedly mounted with a pushing ring (82), the moving block (31) abuts against the surface of the pushing ring (82), and the moving block (31) will push the pushing ring (82) to move when it moves; the sealing ring (4) is provided with a pushing block (8), the first mounting ring (03) has a pushing groove (81), the pushing groove (81) is set with an arc structure, and the pushing block (8) slides in the pushing groove (81).

9. The lithium iron phosphate production wastewater recycling device according to claim 1, characterized in that: The second mounting ring (11) includes a mounting part and a connecting part. Both the mounting part and the connecting part are configured as annular structures. The mounting part is fixed on the end face of the filter ring (12). The connecting part is rotatably connected to the mounting part. The outer diameter of the connecting part is smaller than the outer diameter of the mounting part. The connecting part is provided with an external thread. The first mounting ring (03) is provided with an internal thread. The connecting part is threadedly connected to the first mounting ring (03).

10. A method for recycling wastewater from lithium iron phosphate production, characterized in that: The lithium iron phosphate production wastewater recycling device according to claim 7 includes the following steps: S1: The filter ring (12) is blocked by the blocking ring (4), and the turbid sewage in the treatment tank (01) flows into the drain pipe (02) through the filter screen (23); S2: When the filter screen (23) is clogged, the turbid sewage pushes the filter screen (23) and the fourth mounting ring (22) to move, the first mounting ring (03) drives the sealing ring (4) to move, the sealing ring (4) and the sealing strip (42) are misaligned, and the connecting hole (41) is opened; S3: The sewage flowing out of the filter hole (13) drives the impeller (43) and filter ring (12) to rotate, and the filter ring (12) drives the cleaning rod (61) and cleaning scraper (62) to rotate.

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