Sewage treatment device and method for lithium carbonate preparation

Abstract

The invention discloses a sewage treatment device and method for lithium carbonate preparation, and relates to the technical field of sewage treatment.The sewage treatment device comprises an outer tank body, a centrifugal discharging piece is arranged on the inner side of a connecting sleeve, and a blocking piece is arranged between the top of an inner tank body and the top of the inner wall of the outer tank body. By arranging a centrifugal discharging piece, when a transmission shaft drives a connecting sleeve to move upwards, an annular clamping plate can move towards a T-shaped pipe, so that the top of the annular clamping plate is in contact with the top edge of the T-shaped pipe, and a circular filter plate and an annular filter plate synchronously move upwards; a first motor is started to enable the wastewater on the surfaces of the impurities to penetrate through an annular filter plate under the action of centrifugal force, so that the wastewater on the surfaces of the impurities falls into the inner tank body again, and then a gap is formed between a circular filter plate and the annular filter plate through a second motor, so that the impurities fall into the inner side of an impurity collecting box; impurities separated from the wastewater do not need to be cleaned independently, and meanwhile, the impurities are prevented from being discharged out of the inner tank body together with the wastewater.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to a sewage treatment device and method for lithium carbonate preparation. Background Art

[0002] Battery-grade lithium carbonate is an important material used in the manufacture of lithium-ion batteries. Lithium-ion batteries are high-performance batteries currently widely used in mobile electronic devices, electric vehicles, energy storage systems and other fields. As the positive electrode material of lithium-ion batteries, lithium carbonate has a high energy density and a long cycle life, and is therefore widely used. Battery-grade lithium carbonate is generally required to have high purity, low impurity content and a certain particle size distribution to ensure battery performance and safety. The process of manufacturing battery-grade lithium carbonate includes ore extraction, chemical reaction, crystal growth and powder processing. However, the production of battery-grade lithium carbonate inevitably produces wastewater.

[0003] Generally, when treating wastewater, in order to separate smaller impurities in the wastewater from the wastewater, some reagents need to be added to the wastewater. The reagents react with the wastewater to separate the impurities in the wastewater from the wastewater. At the same time, the separated impurities will be precipitated in the wastewater treatment tank. At this time, if the sediment in the wastewater is directly cleaned, the wastewater attached to the surface of the sediment will be discharged together with the sediment, which will cause part of the wastewater to be unable to undergo subsequent purification, which will affect. Summary of the Invention

[0004] The purpose of the present invention is to provide a wastewater treatment device and method for lithium carbonate preparation in order to solve the problem of inconvenience in removing wastewater adhering to the surface of the precipitate, resulting in incomplete treatment.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: A sewage treatment device for lithium carbonate preparation, comprising an outer tank body, an impurity collection box being installed at the bottom of the outer tank body, a docking rod being installed above the impurity collection box on the inner wall of the outer tank body, an inner tank body being installed on the top of the docking rod, a water inlet pipe extending to the top of the inner tank body being provided on the top of the outer tank body, a conical ring plate being provided at the top edge of the inner tank body, a second cylinder being installed at the bottom of the conical ring plate, an output end of the second cylinder being connected to an extension rod extending to the top of the outer tank body, a support plate being provided on the top of the extension rod being provided, a first motor being installed on the top of the support plate, an output end of the first motor being connected to a transmission shaft extending to the inside of the inner tank body, a connecting sleeve being provided at the bottom of the transmission shaft, a stirring rod being installed on the outer wall of the connecting sleeve, a centrifugal discharge piece being provided on the inside of the connecting sleeve, a material stopper being provided between the top of the inner tank body and the top of the inner wall of the outer tank body, and a drain pipe extending to the outside of the outer tank body being provided at the bottom of the inner tank body.

[0006] As a further solution of the present invention, the diameter of the inner wall of the outer tank body is larger than the diameter of the outer wall of the inner tank body, and a gap is left between the top of the inner tank body and the top of the inner wall of the outer tank body.

[0007] As a further solution of the present invention: the centrifugal discharge member includes a T-tube inserted into the bottom of the connecting sleeve and extending to the inner side of the connecting sleeve, the top of the T-tube is equipped with a second motor located on the inner side of the connecting sleeve, the top of the second motor is provided with a control compartment, the output end of the second motor is connected to a threaded rod extending to the inner side of the T-tube, the outer side of the threaded rod is sleeved with a threaded sleeve, slide grooves are provided on both sides of the T-tube, and slide rods slidably connected to the slide grooves are provided on both sides of the threaded sleeve, one end of the slide rod is installed on the annular filter plate, and the bottom of the T-tube is provided with a circular filter plate located below the annular filter plate.

[0008] As a further solution of the present invention: the centrifugal discharge member also includes positioning rods installed on both sides of the top of the T-tube, a pin is inserted at the bottom of the positioning rod, and a second telescopic spring connected to the inner wall of the pin is provided at the bottom of the positioning rod, and an annular clamping plate located below the pin is installed on the inner wall of the connecting sleeve, and a locking hole is provided on the top of the annular clamping plate that passes through the annular clamping plate.

[0009] As a further solution of the present invention: the top edge of the annular filter plate is in contact with the inner wall of the inner tank body, and the diameter of the circular filter plate is equal to the bottom diameter of the annular filter plate, so that the annular filter plate can lift impurities in the wastewater when moving upward.

[0010] As a further solution of the present invention: the bottom of the pin is rotatably connected to a ball through a rotating shaft, and the diameter of the pin is equal to the diameter of the locking hole. When the annular clamping plate moves up with the connecting sleeve, if the pin and the locking hole are not aligned, the pin will move relative to the positioning rod due to the squeezing of the annular clamping plate. At this time, the first motor drives the connecting sleeve to rotate to rotate the locking hole to a position aligned with the pin.

[0011] As a further solution of the present invention: the material blocking member includes a first cylinder installed on both sides of the top of the outer tank body, the output end of the first cylinder is connected to a support frame, the bottom of the support frame is provided with a clamping ring located on the outside of the outer tank body, the top of the clamping ring is installed with a clamping block, the top of the clamping block is rotatably connected to a connecting oblique rod through a rotating shaft, the other end of the connecting oblique rod is rotatably connected to a push rod extending to the inside of the outer tank body through a rotating shaft, one end of the push rod is provided with an arc-shaped baffle located above the clamping block, and one side of the arc-shaped baffle is provided with a first telescopic spring connected to the inner wall of the outer tank body.

[0012] As a further solution of the present invention: the curvature of the arc baffle close to the inner tank body is equal to the curvature of the inner wall of the inner tank body, and there are multiple arc baffles, and the multiple arc baffles are equidistantly distributed along the center of the inner tank body.

[0013] As a further solution of the present invention: the height of the arc-shaped baffle is equal to the shortest distance from the bottom of the circular filter plate to the top of the annular filter plate.

[0014] The present invention also discloses a method for treating wastewater used in the preparation of lithium carbonate, which uses the above-mentioned wastewater treatment device for the preparation of lithium carbonate, comprising the following steps: S1: The wastewater is discharged into the inner tank through the water inlet pipe, and then the wastewater treatment agent is injected into the inner side of the inner tank through the water inlet pipe; S2: Start the first motor, and drive the transmission shaft through the first motor to make the stirring rod fully mix the wastewater and the reagent in the inner tank. As the wastewater is stirred, the impurities in the wastewater will be flocculated and precipitated under the action of the reagent; S3: Start the second cylinder, and the second cylinder drives the extension rod to move upward, so that the support plate drives the first motor to move upward. At this time, the first motor can drive the connecting sleeve to move upward. At this time, the centrifugal discharge member will be connected to the connecting sleeve under the action of its own gravity, so that the impurities in the wastewater can be moved upward under the drive of the centrifugal discharge member. As the first motor moves upward, the connecting sleeve can be moved to the top of the inner tank body, so that the impurities in the wastewater are separated from the wastewater; S4: The first motor is started again, and the operation of the first motor causes the centrifugal discharge member to operate. At this time, the wastewater on the surface of the impurities is separated from the impurities under the action of centrifugal force. At the same time, the wastewater separated from the impurities is blocked by the blocking member and falls into the inner side of the inner tank again. Then, the operation of the blocking member removes the blocking of the top of the inner tank; S5: At the same time, the centrifugal discharge member cooperates with the first motor to make the impurities fall into the gap between the outer tank body and the inner tank body under the action of centrifugal force, and then fall into the impurity collection box under the action of the impurities' own gravity. Then, the waste water inside the inner tank body can be pumped out through the drain pipe.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. By setting a centrifugal discharge part, when the transmission shaft drives the connecting sleeve to move upward, the annular clamping plate will move toward the T-tube, so that the top of the annular clamping plate contacts the top edge of the T-tube, and the circular filter plate and the annular filter plate move upward synchronously. The first motor is started to make the wastewater on the impurity surface pass through the annular filter plate under the action of centrifugal force, so that the wastewater on the impurity surface falls into the inner tank again. Subsequently, a gap is created between the circular filter plate and the annular filter plate by the second motor. The first motor is started again, so that the dehydrated impurities on the top of the circular filter plate are moved to the gap between the inner tank and the outer tank under the action of centrifugal force, so that the impurities fall to the inside of the impurity collection box. There is no need to clean the impurities separated in the wastewater separately, and it also prevents the impurities from being discharged from the inner tank together with the wastewater, thereby further improving the wastewater treatment efficiency. When the filter element is in the air, the filter press is turned on and the filter element is in the air, so that the filter press can be turned on and the filter press can be turned on. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of the present invention as a whole; Figure 2 This is a schematic diagram of the internal structure of the outer tank body of the present invention; Figure 3 This is a schematic diagram of the inner tank structure of the present invention; Figure 4 This is a schematic diagram of the internal structure of the inner tank body of the present invention; Figure 5 This is a schematic diagram of the internal structure of the connecting sleeve of the present invention; Figure 6 This is a schematic diagram of the connection between the annular clamping plate and the T-tube of the present invention; Figure 7 This is a schematic diagram of the connection between the positioning rod and the latch of the present invention; Figure 8 It is a structural schematic diagram of the material blocking member of the present invention.

[0017] In the figure: 1. outer tank body; 2. impurity collection box; 3. water inlet pipe; 4. first motor; 5. first cylinder; 6. support frame; 7. snap ring; 8. push rod; 9. connecting diagonal rod; 10. drain pipe; 11. support plate; 12. clamping block; 13. first telescopic spring; 14. arc baffle; 15. second telescopic spring; 16. transmission shaft; 17. annular filter plate; 18. connecting sleeve; 19. docking rod; 20. circular filter plate; 21. inner tank body; 22. conical ring plate; 23. extension rod; 24. second cylinder; 25. stirring rod; 26. threaded rod; 27. control compartment; 28. second motor; 29. ​​sliding rod; 30. annular clamping plate; 31. threaded sleeve; 32. T-tube; 33. slide groove; 34. locking hole; 35. positioning rod; 36. latch. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and should not be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, they can be fixedly connected, detachably connected, or connected in one piece; they can be mechanically connected or electrically connected; they can be directly connected, or indirectly connected through an intermediate medium, or they can be internal connections between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following describes an embodiment of the present invention based on its overall structure.

[0020] See also Figures 1 to 8In an embodiment of the present invention, a wastewater treatment device for lithium carbonate preparation includes an outer tank body 1, an impurity collection box 2 is installed at the bottom of the outer tank body 1, a docking rod 19 is installed on the inner wall of the outer tank body 1 and is located above the impurity collection box 2, an inner tank body 21 is installed on the top of the docking rod 19, and a water inlet pipe 3 extending to the top of the inner tank body 21 is provided on the top of the outer tank body 1. A conical ring plate 22 is provided at the top edge of the inner tank body 21, a second cylinder 24 is installed at the bottom of the conical ring plate 22, and the output end of the second cylinder 24 is connected to a pipe extending to the top of the outer tank body 1. An extension rod 23 is provided on the top of the extension rod 23 with a support plate 11 located above the outer tank body 1, and a first motor 4 is installed on the top of the support plate 11. The output end of the first motor 4 is connected to a transmission shaft 16 extending to the inner side of the inner tank body 21, and a connecting sleeve 18 is provided at the bottom of the transmission shaft 16. A stirring rod 25 is installed on the outer wall of the connecting sleeve 18, and a centrifugal discharge part is provided on the inner side of the connecting sleeve 18. A material blocking part is provided between the top of the inner tank body 21 and the top of the inner wall of the outer tank body 1, and a drainage pipe 10 extending to the outside of the outer tank body 1 is provided at the bottom of the inner tank body 21.

[0021] The inner wall diameter of the outer tank body 1 is larger than the outer wall diameter of the inner tank body 21 , and a gap is left between the top of the inner tank body 21 and the top of the inner wall of the outer tank body 1 .

[0022] In this embodiment: wastewater is discharged into the interior of the inner tank body 21 through the water inlet pipe 3, and then the wastewater treatment agent is injected into the inner side of the inner tank body 21 through the water inlet pipe 3, and then the first motor 4 is started, and the first motor 4 drives the operation of the transmission shaft 16 to make the stirring rod 25 fully mix the wastewater and the agent inside the inner tank body 21. As the wastewater is stirred, the impurities in the wastewater will be flocculated and precipitated under the action of the agent, and the second cylinder 24 is started. The second cylinder 24 drives the extension rod 23 to move upward to make the support plate 11 drive the first motor 4 to move upward. At this time, the first motor 4 can drive the connecting sleeve 18 to move upward. At this time, the centrifugal discharge part will be connected to the connecting sleeve 18 under the action of its own gravity, so that the impurities in the wastewater can be moved upward under the drive of the centrifugal discharge part. The first motor 4 is turned upward and the connecting sleeve 18 is moved to the top of the inner tank body 21, so that the impurities in the wastewater are separated from the wastewater. The first motor 4 is started again, and the centrifugal discharge part is operated by the operation of the first motor 4. At this time, the wastewater on the surface of the impurities will be separated from the impurities under the action of centrifugal force. At the same time, the wastewater separated from the impurities falls to the inside of the inner tank body 21 again due to the obstruction of the blocking part. Then, the top of the inner tank body 21 is unobstructed by the operation of the blocking part. At the same time, the centrifugal discharge part cooperates with the first motor 4 to make the impurities fall into the gap between the outer tank body 1 and the inner tank body 21 under the action of centrifugal force, and then fall into the impurity collection box 2 under the action of the impurities' own gravity. Then, the wastewater inside the inner tank body 21 can be pumped out through the drain pipe 10.

[0023] Please refer to Figure 2 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 The centrifugal discharge member includes a T-shaped tube 32 inserted into the bottom of the connecting sleeve 18 and extending to the inside of the connecting sleeve 18. The top of the T-shaped tube 32 is provided with a second motor 28 located inside the connecting sleeve 18. The top of the second motor 28 is provided with a control compartment 27. The output end of the second motor 28 is connected to a threaded rod 26 extending to the inside of the T-shaped tube 32. The outer side of the threaded rod 26 is sleeved with a threaded sleeve 31. Slide grooves 33 are provided on both sides of the T-shaped tube 32. Slide rods 29 slidably connected to the slide grooves 33 are provided on both sides of the threaded sleeve 31. One end of the slide rod 29 is installed on the annular filter plate 17. The bottom of the T-shaped tube 32 is provided with a circular filter plate 20 located below the annular filter plate 17. The centrifugal discharge part also includes a positioning rod 35 installed on both sides of the top of the T-tube 32, a latch 36 is inserted at the bottom of the positioning rod 35, and a second telescopic spring 15 connected to the inner wall of the latch 36 is provided at the bottom of the positioning rod 35. The inner wall of the connecting sleeve 18 is installed with an annular clamping plate 30 located below the latch 36, and a locking hole 34 is opened at the top of the annular clamping plate 30 and passes through the annular clamping plate 30.

[0024] Among them, the top edge of the annular filter plate 17 fits into the inner wall of the inner tank body 21, and the diameter of the circular filter plate 20 is equal to the bottom diameter of the annular filter plate 17, so that the annular filter plate 17 can lift the impurities in the wastewater when it moves upward. The bottom of the latch 36 is connected to a ball bearing by rotating the shaft. The diameter of the latch 36 is equal to the diameter of the locking hole 34. When the annular clamping plate 30 moves upward with the connecting sleeve 18, if the latch 36 is not aligned with the locking hole 34, the latch 36 will move relative to the positioning rod 35 due to the squeezing of the annular clamping plate 30. At this time, the first motor 4 drives the connecting sleeve 18 to rotate to rotate the locking hole 34 to a position aligned with the latch 36.

[0025] In this embodiment, when the wastewater and the reagent are mixed, the transmission shaft 16 drives the connecting sleeve 18 to rotate. At this time, the T-tube 32 and the annular clamping plate 30 are in a separated state. When the wastewater and the reagent are fully in contact, the sediment generated in the wastewater will be located on the inner side of the annular filter plate 17. When the transmission shaft 16 drives the connecting sleeve 18 to move upward, the annular clamping plate 30 will move toward the T-tube 32. At this time, the pin 36 will pass through the locking hole 34, so that the top of the annular clamping plate 30 is aligned with the T-tube 32. When the top edge of the inner tank body 21 is in contact with the top edge of the inner tank body 21, the connecting sleeve 18 will drive the T-shaped tube 32 to move upward synchronously when the connecting sleeve 18 moves upward, so that the circular filter plate 20 and the annular filter plate 17 can move upward synchronously. When the annular filter plate 17 moves to the gap between the top of the inner tank body 21 and the outer tank body 1, the impurities in the wastewater will be separated from the wastewater under the support of the circular filter plate 20. At this time, the first motor 4 is started. When the first motor 4 drives the connecting sleeve 18 to rotate, the connecting sleeve 18 will pass through the annular clamping plate 30 and the locking hole 34. The first motor 4 is started again, and the dehydrated impurities on the top of the circular filter plate 20 are moved into the gap between the inner tank body 21 and the outer tank body 1 under the action of centrifugal force, so that the impurities fall into the inner side of the impurity collection box 2, without the need to clean the impurities separated in the wastewater separately, and at the same time, it is prevented that the impurities are carried by the wastewater out of the inner tank body 21, thereby further improving the wastewater treatment efficiency.

[0026] Please refer to Figure 1 、 Figure 2 、 Figure 8 The material blocking member includes a first cylinder 5 installed on both sides of the top of the outer tank body 1, the output end of the first cylinder 5 is connected to a support frame 6, the bottom of the support frame 6 is provided with a clamping ring 7 located on the outside of the outer tank body 1, and a clamping block 12 is installed on the top of the clamping ring 7. The top of the clamping block 12 is rotatably connected to a connecting oblique rod 9 through a rotating shaft, and the other end of the connecting oblique rod 9 is rotatably connected to a push rod 8 extending to the inside of the outer tank body 1 through a rotating shaft. One end of the push rod 8 is provided with an arc-shaped baffle 14 located above the block 12, and one side of the arc-shaped baffle 14 is provided with a first telescopic spring 13 connected to the inner wall of the outer tank body 1.

[0027] Among them, the curvature of the arc baffle 14 on the side close to the inner tank body 21 is equal to the curvature of the inner wall of the inner tank body 21. There are multiple arc baffles 14, and the multiple arc baffles 14 are distributed at equal distances along the center of the inner tank body 21. The height of the arc baffle 14 is equal to the shortest distance from the bottom of the circular filter plate 20 to the top of the annular filter plate 17.

[0028] In this embodiment, when the circular filter plate 20 and the annular filter plate 17 are not separated, the top of the inner tank body 21 is blocked by the arc baffle 14. At this time, the wastewater separated from the annular filter plate 17 will fall into the inner tank body 21 along the arc baffle 14 and the inner wall of the inner tank body 21. When cleaning the impurities on the top of the circular filter plate 20, the first cylinder 5 is started first, and the support frame 6 is driven downward by the extension of the first cylinder 5, so that the clamping ring 7 is moved vertically downward. At this time, the block 12 on the top of the clamping ring 7 will engage the connecting diagonal rod 9. One end is pulled, and at the same time, the elastic restoring force of the first telescopic spring 13 is cooperated to make the push rod 8 drive the arc baffle 14 to move in the direction away from the center of the inner tank body 21, so that the top of the inner tank body 21 is unblocked. At this time, the impurities discharged when the circular filter plate 20 and the annular filter plate 17 rotate and separate will fall between the inner tank body 21 and the outer tank body 1, so that the impurities fall into the impurity collection box 2 at the bottom of the outer tank body 1, so that the impurities in the wastewater can be quickly removed, and the amount of wastewater residual on the surface of the impurities can be reduced.

[0029] In combination with the above-mentioned wastewater treatment device for lithium carbonate production, a method for treating wastewater for lithium carbonate production is provided, which specifically comprises the following steps: S1: The wastewater is discharged into the inner tank body 21 through the water inlet pipe 3, and then the wastewater treatment agent is injected into the inner side of the inner tank body 21 through the water inlet pipe 3; S2: Start the first motor 4, and drive the transmission shaft 16 through the first motor 4 to make the stirring rod 25 fully mix the wastewater and the reagent inside the inner tank 21. As the wastewater is stirred, the impurities in the wastewater will be flocculated and precipitated under the action of the reagent; S3: Start the second cylinder 24, and the second cylinder 24 drives the extension rod 23 to move upward to make the support plate 11 drive the first motor 4 to move upward. At this time, the first motor 4 can drive the connecting sleeve 18 to move upward. When the transmission shaft 16 drives the connecting sleeve 18 to move upward, the annular clamping plate 30 will move toward the T-shaped tube 32. At this time, the pin 36 will pass through the locking hole 34, so that the top of the annular clamping plate 30 contacts the top edge of the T-shaped tube 32. At this time, when the connecting sleeve 18 moves upward, it will drive the T-shaped tube 32 to move upward synchronously, so that the circular filter plate 20 and the annular filter plate 17 are engaged. The first motor 4 is started, and the first motor 4 drives the connecting sleeve 18 to rotate. The connecting sleeve 18 drives the T-shaped tube 32 to rotate synchronously through the annular clamping plate 30, the locking hole 34, and the latch 36, so that the circular filter plate 20 and the annular filter plate 17 rotate, so that the wastewater on the impurity surface passes through the annular filter plate 17 under the action of centrifugal force, so that the wastewater on the impurity surface falls into the inner tank body 21 again; S4: Start the first cylinder 5. The extension of the first cylinder 5 drives the support frame 6 to move downward, thereby causing the clamping ring 7 to move vertically downward. At this time, the clamping block 12 on the top of the clamping ring 7 pulls one end of the connecting diagonal rod 9. At the same time, the elastic restoring force of the first telescopic spring 13 is used to cause the push rod 8 to drive the arc-shaped baffle 14 to move away from the center of the inner tank body 21, thereby removing the cover on the top of the inner tank body 21. S5: The second motor 28 drives the threaded rod 26 to rotate, so that the threaded sleeve 31 drives the sliding rod 29 to move, thereby moving the annular filter plate 17 relative to the circular filter plate 20. At this time, a gap will appear between the circular filter plate 20 and the annular filter plate 17. At this time, the impurities discharged when the circular filter plate 20 and the annular filter plate 17 rotate and separate will fall between the inner tank body 21 and the outer tank body 1, so that the impurities fall into the impurity collection box 2 at the bottom of the outer tank body 1, and then the wastewater inside the inner tank body 21 can be pumped out through the drain pipe 10.

[0030] The above is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A wastewater treatment device for lithium carbonate production, comprising an outer tank (1), characterized in that: An impurity collecting box (2) is installed at the bottom of the outer tank body (1), a docking rod (19) located above the impurity collecting box (2) is installed on the inner wall of the outer tank body (1), an inner tank body (21) is installed on the top of the docking rod (19), a water inlet pipe (3) extending to the top of the inner tank body (21) is provided at the top of the outer tank body (1), a conical ring plate (22) is provided at the top edge of the inner tank body (21), a second cylinder (24) is installed at the bottom of the conical ring plate (22), an output end of the second cylinder (24) is connected to an extension rod (23) extending to the top of the outer tank body (1), and the top of the extension rod (23) is connected to the outer tank body (1). The outer tank body (1) is provided with a support plate (11) located above the outer tank body (1), the top of the support plate (11) is provided with a first motor (4), the output end of the first motor (4) is connected to a transmission shaft (16) extending to the inner side of the inner tank body (21), the bottom of the transmission shaft (16) is provided with a connecting sleeve (18), the outer wall of the connecting sleeve (18) is provided with a stirring rod (25), the inner side of the connecting sleeve (18) is provided with a centrifugal discharge member, a material stopper is provided between the top of the inner tank body (21) and the top of the inner wall of the outer tank body (1), and the bottom of the inner tank body (21) is provided with a drainage pipe (10) extending to the outside of the outer tank body (1).

2. A sewage treatment plant for lithium carbonate preparation according to claim 1, characterized in that, The inner wall diameter of the outer tank body (1) is larger than the outer wall diameter of the inner tank body (21), and a gap is left between the top of the inner tank body (21) and the top of the inner wall of the outer tank body (1).

3. A sewage treatment plant for lithium carbonate preparation according to claim 1, characterized in that, The centrifugal discharge member includes a T-shaped tube (32) inserted into the bottom of the connecting sleeve (18) and extending to the inside of the connecting sleeve (18), a second motor (28) located inside the connecting sleeve (18) is installed on the top of the T-shaped tube (32), a control chamber (27) is provided on the top of the second motor (28), an output end of the second motor (28) is connected to a threaded rod (26) extending to the inside of the T-shaped tube (32), a threaded sleeve (31) is sleeved on the outside of the threaded rod (26), a slide groove (33) is provided on both sides of the T-shaped tube (32), a slide rod (29) slidably connected to the slide groove (33) is provided on both sides of the threaded sleeve (31), one end of the slide rod (29) is installed on the annular filter plate (17), and a circular filter plate (20) located below the annular filter plate (17) is provided at the bottom of the T-shaped tube (32).

4. A sewage treatment plant for lithium carbonate preparation according to claim 3, characterized in that, The centrifugal discharge member further comprises positioning rods (35) mounted on both sides of the top of the T-shaped tube (32), a latch (36) being inserted at the bottom of the positioning rod (35), a second telescopic spring (15) connected to the inner wall of the latch (36) being provided at the bottom of the positioning rod (35), an annular clamping plate (30) located below the latch (36) being mounted on the inner wall of the connecting sleeve (18), and a locking hole (34) penetrating the annular clamping plate (30) being provided at the top of the annular clamping plate (30).

5. A sewage treatment device for lithium carbonate preparation according to claim 4, characterized in that, The top edge of the annular filter plate (17) is in contact with the inner wall of the inner tank body (21), and the diameter of the circular filter plate (20) is equal to the bottom diameter of the annular filter plate (17), so that the annular filter plate (17) lifts impurities in the wastewater when moving upward.

6. A sewage treatment device for lithium carbonate preparation according to claim 4, characterized in that, The bottom of the latch (36) is connected to a ball bearing through a rotating shaft. The diameter of the latch (36) is equal to the diameter of the locking hole (34). When the annular clamping plate (30) moves upward along with the connecting sleeve (18), if the latch (36) and the locking hole (34) are not aligned, the latch (36) will be squeezed by the annular clamping plate (30) and move relative to the positioning rod (35). At this time, the first motor (4) drives the connecting sleeve (18) to rotate so that the locking hole (34) is rotated to a position aligned with the latch (36).

7. A sewage treatment device for lithium carbonate preparation according to claim 4, characterized in that, The material blocking member comprises a first cylinder (5) mounted on both sides of the top of the outer tank body (1); the output end of the first cylinder (5) is connected to a support frame (6); the bottom of the support frame (6) is provided with a clamping ring (7) located outside the outer tank body (1); the top of the clamping ring (7) is provided with a clamping block (12); the top of the clamping block (12) is rotatably connected to a connecting oblique rod (9) via a rotating shaft; the other end of the connecting oblique rod (9) is rotatably connected to a push rod (8) extending to the inner side of the outer tank body (1) via a rotating shaft; one end of the push rod (8) is provided with an arc-shaped baffle (14) located above the clamping block (12); and one side of the arc-shaped baffle (14) is provided with a first telescopic spring (13) connected to the inner wall of the outer tank body (1).

8. A sewage treatment device for lithium carbonate preparation according to claim 7, characterized in that, The curvature of the arc-shaped baffle (14) on the side close to the inner tank body (21) is equal to the curvature of the inner wall of the inner tank body (21), and a plurality of the arc-shaped baffles (14) are provided, and the plurality of arc-shaped baffles (14) are distributed at equal distances along the center of the inner tank body (21).

9. A sewage treatment device for lithium carbonate preparation according to claim 7, characterized in that, The height of the arc-shaped baffle (14) is equal to the shortest distance from the bottom of the circular filter plate (20) to the top of the annular filter plate (17).

10. A method for treating wastewater for lithium carbonate preparation, characterized in that: A wastewater treatment device for lithium carbonate production according to any one of claims 1 to 9 is used, comprising the following steps: S1: Discharge the wastewater into the interior of the inner tank (21) through the water inlet pipe (3), and then inject the wastewater treatment agent into the inner side of the inner tank (21) through the water inlet pipe (3); S2: starting the first motor (4), and driving the transmission shaft (16) through the first motor (4) to make the stirring rod (25) fully mix the wastewater and the reagent inside the inner tank (21). As the wastewater is stirred, the impurities in the wastewater will be flocculated and precipitated under the action of the reagent; S3: Start the second cylinder (24), and the second cylinder (24) drives the extension rod (23) to move upward, so that the support plate (11) drives the first motor (4) to move upward. At this time, the first motor (4) can drive the connecting sleeve (18) to move upward. At this time, the centrifugal discharge member will be connected to the connecting sleeve (18) under the action of its own gravity, so that the impurities in the wastewater can be moved upward under the drive of the centrifugal discharge member. As the first motor (4) moves upward, the connecting sleeve (18) can be moved to the top of the inner tank (21), so that the impurities in the wastewater are separated from the wastewater; S4: The first motor (4) is started again, and the centrifugal discharge member is operated by the operation of the first motor (4). At this time, the wastewater on the surface of the impurities is separated from the impurities under the action of centrifugal force. At the same time, the wastewater separated from the impurities falls into the inner side of the inner tank body (21) again due to the shielding of the blocking member. Then, the top of the inner tank body (21) is unshielded by the operation of the blocking member. S5: At the same time, the centrifugal discharge member and the first motor (4) cooperate to cause the impurities to fall into the gap between the outer tank body (1) and the inner tank body (21) under the action of centrifugal force, and then fall into the impurity collection box (2) under the action of the impurities' own gravity. Subsequently, the waste water inside the inner tank body (21) can be pumped out through the drain pipe (10).

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