Device for extracting electronic-grade NMP solvent from wastewater

Abstract

The invention discloses a device for extracting an electronic-grade NMP solvent from wastewater, and relates to the technical field of NMP recovery, the device comprises a filter bin, a side plate is provided with an alternating plate part, the side plate is connected with a filter plate through the alternating plate part, and the outer wall of a drain pipe is provided with a reversing flow guide part. According to the invention, by arranging the alternate plate replacing piece, when most of filter holes in the filter plates are blocked, the brand new filter plates are mounted on the filter plate mounting seats below the side plates, and a transmission rack shifts a first transmission straight gear to rotate clockwise through the contraction of a telescopic air cylinder, so that the two filter plates are arranged in an aligned manner; then the telescopic air cylinder continues to contract, at the moment, the telescopic spring located in the guide frame below the side plate can contract under extrusion of the sliding block, meanwhile, the sliding block above the side plate can pull the guide frame, and at the moment, the waste water can fall on the filter plate located at the lower position; therefore, the filter plate can be replaced under the condition that wastewater filtration is not influenced.

Description

Technical Field

[0001] The invention relates to the technical field of NMP recovery, in particular to a device for extracting electronic grade NMP solvent from waste water. Background Art

[0002] NMP is an important auxiliary material for producing lithium-ion battery electrodes. It is expensive. When wastewater contains NMP, NMP recovery devices are usually used for recycling. Existing NMP recovery devices usually use filtration and distillation methods to convert NMP in wastewater into gas for recycling.

[0003] However, when filtering wastewater containing NMP, impurities accumulate on the surface of the filter plate, and long-term use will cause the filter holes of the filter plate to be blocked, which will reduce the amount of wastewater passing through the filter plate. At this time, it is necessary to replace it. Generally, the injection of wastewater needs to be stopped when replacing the filter plate, which will affect the overall recovery efficiency of the equipment for NMP. At the same time, due to the fixed position of the drain port, a large amount of wastewater impurities accumulate under the drain port, resulting in a low utilization rate of the filter plate, thereby increasing the replacement frequency of the filter plate. Summary of the invention

[0004] The purpose of the present invention is to provide a device for extracting electronic grade NMP solvent from wastewater in order to solve the problem that it is inconvenient to replace the filter plate without affecting the filtration of wastewater and the filter plate has a high replacement frequency.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a device for extracting electronic grade NMP solvent from wastewater, comprising a filter bin, a placement groove is provided on one side of the filter bin, a valve is installed at the bottom of the filter bin, a distillation bin is installed at the bottom of the valve, a side plate is installed on the outer wall of the filter bin, an alternating plate member is installed on the side plate, two placement grooves are provided on the outer wall of the filter bin located at the top and bottom of the side plate, the side plate is connected to the filter plate through the alternating plate member, a support frame is installed on the top of the filter bin, a drain pipe is arranged on the support frame, and a reversing guide member is installed on the outer wall of the drain pipe.

[0006] As a further solution of the present invention: The alternating replacement plate member includes a first rotating shaft installed at one end of the side plate away from the filter chamber. Both the top and bottom of the first rotating shaft are equipped with direct connection guide rails. Both ends of the first rotating shaft are provided with first driving spur gears located outside the side plate. An expansion cylinder is installed on the outer wall of the side plate. The output end of the expansion cylinder is connected to a driving rack that meshes with the first driving spur gear. Both the top and bottom of the side plate are slidably connected with limit sliding plates. A guide frame is installed on the top of the limit sliding plate. A slider is slidably connected inside the guide frame. One side of the slider close to the filter chamber is equipped with a telescopic spring connected to the inner wall of the guide frame. One side of the top of the slider is equipped with a pull rod. The inner side of the pull rod is equipped with a shifting pin that is slidably connected to the direct connection guide rail. One end of the guide frame is equipped with a filter plate mounting seat. One side of the filter plate mounting seat is connected to the filter plate through bolts.

[0007] As a further solution of the present invention: The alternating replacement plate member further includes a support plate installed on the outer wall of the filter chamber. The top of the support plate is of an inclined structure.

[0008] As a further solution of the present invention: The diameter of the shifting pin is equal to the inner width of the direct connection guide rail.

[0009] As a further solution of the present invention: The length and width of the top of the support plate are both greater than the length and width of the filter plate.

[0010] As a further solution of the present invention: The flow direction changing and guiding member includes an arc-shaped chamber installed on the outer wall of the drain pipe. A second rotating shaft extending outside the arc-shaped chamber is rotatably connected inside the arc-shaped chamber through a bearing. First driving bevel gears are provided at both ends of the second rotating shaft. A pagination plate located inside the arc-shaped chamber and extending to the inside of the drain pipe is fixedly connected to the second rotating shaft. A positioning plate is fixedly connected to the outer wall of the drain pipe. A reciprocating lead screw is rotatably connected to the positioning plate. A second driving bevel gear that meshes with the second rotating shaft is installed at one end of the reciprocating lead screw. A limit rod is installed on the positioning plate above the reciprocating lead screw. A moving block is movably sleeved on the reciprocating lead screw. An extension rod is installed at the bottom of the moving block. Third rotating shafts are rotatably connected to both sides of the bottom of the drain pipe through bearings. A diversion plate is installed on the third rotating shaft. Second driving spur gears are installed at both ends of the third rotating shaft. A shifting rack that meshes with the second driving spur gear is installed at the bottom of the extension rod.

[0011] As a further solution of the present invention: A through hole matching the limit rod is provided on the moving block. The moving block is slidably connected to the limit rod through the through hole.

[0012] As a further solution of the present invention: The arc-shaped chamber is in a communicating state with the drain pipe. The width of the pagination plate is smaller than the inner width of the drain pipe.

[0013] As a further solution of the present invention: The center of the arc-shaped bin is coaxial with the center of the second rotating shaft.

[0014] As a further solution of the present invention: The width of the deflector is equal to the width of the drain pipe.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. By setting the interchangeable plate members, when most of the filter holes on the filter plate are blocked, a new filter plate is installed on the filter plate mounting seat below the side plate. The telescopic cylinder contracts to make the transmission rack drive the first transmission spur gear to rotate clockwise, so as to realize the alignment placement of the two filter plates. Then the telescopic cylinder continues to contract. At this time, the telescopic spring inside the guide frame below the side plate will be compressed by the slider and contract. At the same time, the slider above the side plate will pull the guide frame, so that the filter plate with blocked filter holes will move out of the filter bin along with the movement of the guide frame. At this time, the wastewater will fall on the filter plate at a lower position. In this way, the filter plate can be replaced without affecting the filtration of wastewater. 2. By setting the flow direction changing and guiding member, when the wastewater passes through the drain pipe, the impact force of the water flow will drive the pagination plate to rotate. At this time, the pagination plate will drive the second rotating shaft to rotate synchronously. When the second rotating shaft rotates, it will drive the second transmission bevel gear to rotate through the first transmission bevel gear, so as to make the reciprocating lead screw rotate. When the reciprocating lead screw rotates, the moving block will move horizontally back and forth along the reciprocating lead screw. During this process, the shifting rack will drive the second transmission spur gear to rotate, so as to make the second transmission spur gear drive the deflector to swing, so that the wastewater will fall to different positions of the filter plate under the guiding action of the deflector, so as to prevent the wastewater impurities filtered by the filter plate from accumulating directly below the drain pipe, so that different positions of the filter plate can filter the wastewater. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a schematic connection diagram of the filter bin and the support plate of the present invention; Figure 3 is a schematic internal structure diagram of the filter bin of the present invention; Figure 4 is a schematic connection diagram of the side plate and the guide frame of the present invention; Figure 5 is a schematic connection diagram of the direct connection guide rail and the guide frame of the present invention; Figure 6 is a schematic structural diagram of the flow direction changing and guiding member of the present invention; Figure 7Schematic diagram of the internal structure of the drain pipe and the arc-shaped bin of the present invention; Figure 8 Schematic diagram of the connection between the reciprocating lead screw and the moving block of the present invention.

[0017] In the figure: 1, filter bin; 2, valve; 3, distillation bin; 4, support plate; 5, filter plate; 6, support frame; 7, drain pipe; 8, side plate; 9, telescopic cylinder; 10, first driving spur gear; 11, pull rod; 12, direct connection guide rail; 13, telescopic spring; 14, guide frame; 15, slider; 16, limit slide plate; 17, shifting pin; 18, first rotating shaft; 19, driving rack; 20, filter plate mounting seat; 21, placement groove; 22, arc-shaped bin; 23, second rotating shaft; 24, first driving bevel gear; 25, shifting rack; 26, third rotating shaft; 27, second driving spur gear; 28, guide plate; 29, second driving bevel gear; 30, reciprocating lead screw; 31, limit rod; 32, positioning plate; 33, pagination plate; 34, extension rod; 35, moving block. Specific embodiments

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0019] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot 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 "installation", "connection", "connection", and "setting" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. 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 situations. The following describes the embodiments according to the overall structure of the present invention.

[0020] Please refer to Figures 1 to 8, in the embodiment of the present invention, a device for extracting electronic-grade NMP solvent from wastewater includes a filtration chamber 1. A placement groove 21 is provided on one side of the filtration chamber 1. A valve 2 is installed at the bottom of the filtration chamber 1. The bottom end of the valve 2 is installed with a distillation chamber 3. A side plate 8 is installed on the outer wall of the filtration chamber 1. An interchangeable plate member is installed on the side plate 8. Two placement grooves 21 are provided on the outer wall of the filtration chamber 1 at the top and bottom of the side plate 8. The side plate 8 is connected to a filter plate 5 through the interchangeable plate member. A support frame 6 is installed at the top of the filtration chamber 1. A drain pipe 7 is provided on the support frame 6. A flow direction changing and guiding member is installed on the outer wall of the drain pipe 7.

[0021] In this embodiment, when recovering the NMP solvent in the wastewater, first connect the wastewater discharge pipe to the drain pipe 7 so that the wastewater discharged from the drain pipe 7 falls onto the filter plate 5. Then the filter plate 5 will filter the wastewater. During this process, the flow direction changing and guiding member is used to make the wastewater fall at different positions on the filter plate 5, so as to improve the utilization rate of the filter plate 5 and prevent impurities from accumulating at one place on the filter plate 5. The wastewater filtered by the filter plate 5 will enter the distillation chamber 3 through the valve 2. Then close the valve 2 and start the distillation chamber 3. The distillation of the filtered wastewater is realized through the operation of the distillation chamber 3. Then the gas generated by the distillation can be collected.

[0022] Please refer specifically to Figure 2 , Figure 3 , Figure 4 , Figure 5 , the interchangeable plate member includes a first rotating shaft 18 installed at one end of the side plate 8 away from the filtration chamber 1. Direct connection guide rails 12 are installed at the top and bottom of the first rotating shaft 18. First driving straight gears 10 are installed at both ends of the first rotating shaft 18 on the outside of the side plate 8. A telescopic cylinder 9 is installed on the outer wall of the side plate 8. The output end of the telescopic cylinder 9 is connected to a driving rack 19 that meshes with the first driving straight gear 10. The top and bottom of the side plate 8 are both slidably connected with limit sliding plates 16. A guiding frame 14 is installed at the top of the limit sliding plate 16. A slider 15 is slidably connected inside the guiding frame 14. A telescopic spring 13 connected to the inner wall of the guiding frame 14 is installed on one side of the slider 15 close to the filtration chamber 1. A pull rod 11 is installed on one side of the top of the slider 15. A shifting pin 17 slidably connected to the direct connection guide rail 12 is installed inside the pull rod 11. A filter plate mounting seat 20 is installed at one end of the guiding frame 14. One side of the filter plate mounting seat 20 is connected to the filter plate 5 through bolts.

[0023] In this embodiment, when the filter plate 5 above the side plate 8 filters the wastewater, the direct connection guide rail 12 above the first rotating shaft 18 is in an inclined state at this time, and at the same time, the corresponding telescopic spring 13 is in a contracted state. At the same time, the filter plate mounting seat 20 below the side plate 8 is located outside the filtration chamber 1. When most of the filter holes on the filter plate 5 are blocked, resulting in a decrease in the water flow rate entering the distillation chamber 3 after filtration, a new filter plate 5 is installed on the filter plate mounting seat 20 below the side plate 8. Then, the telescopic cylinder 9 is started, and the transmission rack 19 is used to drive the first transmission spur gear 10 to rotate clockwise by the contraction of the telescopic cylinder 9. When the first transmission spur gear 10 rotates clockwise, it will pull the pull rod 11 through the direct connection guide rail 12 at the top of the first rotating shaft 18, so as to make the slider 15 fit with the end of the guide frame 14 away from the filter plate 5. At the same time, the filter plate 5 below the side plate 8 will enter the filtration chamber 1 under the push of the direct connection guide rail 12 at the bottom of the first rotating shaft 18, so as to achieve the aligned placement of the two filter plates 5. Then, the telescopic cylinder 9 continues to contract. At this time, the telescopic spring 13 inside the guide frame 14 below the side plate 8 will be compressed by the slider 15 and contract, and at the same time, the slider 15 above the side plate 8 will pull the guide frame 14, so as to make the filter plate 5 with blocked filter holes move out of the filtration chamber 1 along with the movement of the guide frame 14. At this time, the wastewater will fall on the filter plate 5 at a lower position. In this way, the filter plate 5 can be replaced without affecting the filtration of the wastewater.

[0024] Please refer specifically to Figure 2 、 Figure 3 , the replacement plate member further includes a support plate 4 installed on the outer wall of the filtration chamber 1, and the top of the support plate 4 is of an inclined structure.

[0025] In this embodiment, by setting this structure, the filter plate 5 moved out of the filtration chamber 1 is located above the support plate 4, so that the wastewater remaining on the filter plate 5 passes through the filter plate 5 and falls onto the support plate 4, and then the wastewater flows back into the filtration chamber 1 again through the inclined surface at the top of the support plate 4, so as to achieve the water drainage effect of the impurities on the filter plate 5.

[0026] Please refer specifically to Figure 2 、 Figure 3 、 Figure 5 , the diameter of the shifting pin 17 is equal to the inner width of the direct connection guide rail 12.

[0027] In this embodiment, by setting this structure, when the direct connection guide rail 12 swings with the first rotating shaft 18, the slider 15 is pushed or pulled through the shifting pin 17 and the pull rod 11.

[0028] Please refer specifically to Figure 2 、 Figure 3 , the length and width of the top of the support plate 4 are both greater than the length and width of the filter plate 5.

[0029] In this embodiment, by setting this structure, the pallet 4 completely shields the bottom of the filter plate 5, so as to ensure that the wastewater dripping from the filter plate 5 above the pallet 4 always falls onto the top of the pallet 4.

[0030] Please refer specifically to Figure 1 , Figure 6 , Figure 7 , Figure 8 , the flow guide member includes an arc-shaped bin 22 installed on the outer wall of the drain pipe 7. A second rotating shaft 23 extending to the outside of the arc-shaped bin 22 is rotatably connected inside the arc-shaped bin 22 through a bearing. At both ends of the second rotating shaft 23, there are first transmission bevel gears 24. A pagination plate 33 located inside the arc-shaped bin 22 and extending to the inside of the drain pipe 7 is fixedly connected to the second rotating shaft 23. A positioning plate 32 is fixedly connected to the outer wall of the drain pipe 7. A reciprocating lead screw 30 is rotatably connected to the positioning plate 32. At one end of the reciprocating lead screw 30, there is a second transmission bevel gear 29 meshing with the second rotating shaft 23. A limiting rod 31 is installed on the positioning plate 32 above the reciprocating lead screw 30. A moving block 35 is movably sleeved on the reciprocating lead screw 30. An extension rod 34 is installed at the bottom of the moving block 35. At both sides of the bottom of the drain pipe 7, a third rotating shaft 26 is rotatably connected through a bearing. A flow guide plate 28 is installed on the third rotating shaft 26. At both ends of the third rotating shaft 26, there are second transmission spur gears 27. A shifting rack 25 meshing with the second transmission spur gear 27 is installed at the bottom of the extension rod 34.

[0031] In this embodiment, when the wastewater passes through the drain pipe 7, the pagination plate 33 is rotated by the impact force of the water flow. At this time, the pagination plate 33 will drive the second rotating shaft 23 to rotate synchronously. When the second rotating shaft 23 rotates, it will drive the second transmission bevel gear 29 to rotate through the first transmission bevel gear 24, so as to make the reciprocating lead screw 30 rotate. When the reciprocating lead screw 30 rotates, the moving block 35 will reciprocate horizontally along the reciprocating lead screw 30. During this process, the shifting rack 25 will drive the second transmission spur gear 27 to rotate, so as to make the second transmission spur gear 27 drive the flow guide plate 28 to swing, so that the wastewater falls to different positions of the filter plate 5 under the guiding action of the flow guide plate 28, so as to prevent the wastewater impurities filtered by the filter plate 5 from accumulating directly below the drain pipe 7, so that different positions of the filter plate 5 can filter the wastewater.

[0032] Please refer specifically to Figure 8 , a through hole matching the limiting rod 31 is opened on the moving block 35, and the moving block 35 is slidably connected to the limiting rod 31 through the through hole.

[0033] In this embodiment, by setting this structure, when the reciprocating lead screw 30 rotates, the moving block 35 reciprocates horizontally along the reciprocating lead screw 30.

[0034] Please refer particularly to Figure 7 , the arc-shaped bin 22 is in communication with the drain pipe 7, and the width of the pagination plate 33 is smaller than the inner wall width of the drain pipe 7.

[0035] In this embodiment, by setting this structure, friction between the pagination plate 33 and the drain pipe 7 is prevented.

[0036] Please refer particularly to Figure 6 , Figure 7 , the center of the arc-shaped bin 22 is coaxial with the center of the second rotating shaft 23.

[0037] In this embodiment, by setting this structure, when one side of the pagination plate 33 turns to the inside of the drain pipe 7, the edge thereof is impacted by the wastewater, so that the pagination plate 33 can only rotate in one direction.

[0038] Please refer particularly to Figure 6 , Figure 7 , the width of the guide plate 28 is equal to the width of the drain pipe 7.

[0039] In this embodiment, by setting this structure, when the guide plate 28 is inclined relative to the drain pipe 7, the wastewater passing through the drain pipe 7 is guided.

[0040] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A device for extracting electronic grade NMP solvent from wastewater, comprising a filter chamber (1), characterized in that: A placement groove (21) is provided on one side of the filter bin (1), a valve (2) is installed at the bottom of the filter bin (1), a distillation bin (3) is installed at the bottom end of the valve (2), a side plate (8) is installed on the outer wall of the filter bin (1), an alternating plate member is installed on the side plate (8), two placement grooves (21) are provided on the outer wall of the filter bin (1) at the top and bottom of the side plate (8), the side plate (8) is connected to the filter plate (5) via the alternating plate member, a support frame (6) is installed on the top of the filter bin (1), a drain pipe (7) is provided on the support frame (6), and a reversing guide member is installed on the outer wall of the drain pipe (7).

2. A device for extracting electronic grade NMP solvent from wastewater according to claim 1, characterized in that, The alternating plate member comprises a first rotating shaft (18) mounted on an end of the side plate (8) away from the filter bin (1); the top and bottom of the first rotating shaft (18) are both mounted with direct-connection guide rails (12); both ends of the first rotating shaft (18) are mounted with first transmission spur gears (10) located outside the side plate (8); a telescopic cylinder (9) is mounted on the outer wall of the side plate (8); the output end of the telescopic cylinder (9) is connected to a transmission rack (19) meshing with the first transmission spur gear (10); the top and bottom of the side plate (8) are both slidably connected to a limiting slide plate (16); the limiting slide plate (16) is A guide frame (14) is installed on the top of the positioning slide plate (16), and a slider (15) is slidably connected to the inner side of the guide frame (14). A telescopic spring (13) connected to the inner wall of the guide frame (14) is installed on the side of the slider (15) close to the filter bin (1). A pull rod (11) is installed on the top side of the slider (15), and a shifting pin (17) slidably connected to the direct-connected guide rail (12) is installed on the inner side of the pull rod (11). A filter plate mounting seat (20) is installed at one end of the guide frame (14), and one side of the filter plate mounting seat (20) is connected to the filter plate (5) by bolts.

3. A device for extracting electronic grade NMP solvent from wastewater according to claim 2, characterized in that, The alternating plate member further comprises a support plate (4) mounted on the outer wall of the filter bin (1), and the top of the support plate (4) is in an inclined structure.

4. A device for extracting electronic grade NMP solvent from wastewater according to claim 2, characterized in that, The diameter of the shifting latch (17) is equal to the inner width of the direct-connection guide rail (12).

5. A device for extracting electronic grade NMP solvent from wastewater according to claim 3, characterized in that, The length and width of the top of the support plate (4) are both greater than the length and width of the filter plate (5).

6. A device for extracting electronic grade NMP solvent from wastewater according to claim 2, characterized in that, The reversing flow guide comprises an arc-shaped bin (22) mounted on the outer wall of the drainage pipe (7); the interior of the arc-shaped bin (22) is rotatably connected to a second rotating shaft (23) extending to the outside of the arc-shaped bin (22) via a bearing; first transmission bevel gears (24) are provided at both ends of the second rotating shaft (23); a paging plate (33) located inside the arc-shaped bin (22) and extending to the inside of the drainage pipe (7) is fixedly connected to the second rotating shaft (23); a positioning plate (32) is fixedly connected to the outer wall of the drainage pipe (7); a reciprocating screw (30) is rotatably connected to the positioning plate (32); one end of the reciprocating screw (30) is provided with a gear connected to the second rotating shaft ( A second transmission bevel gear (29) meshed with the reciprocating screw (23), a limiting rod (31) located above the reciprocating screw (30) is installed on the positioning plate (32), a moving block (35) is movably sleeved on the reciprocating screw (30), an extension rod (34) is installed at the bottom of the moving block (35), both sides of the bottom of the drain pipe (7) are rotatably connected to a third rotating shaft (26) through bearings, a guide plate (28) is installed on the third rotating shaft (26), second transmission spur gears (27) are installed at both ends of the third rotating shaft (26), and a shifting rack (25) meshing with the second transmission spur gear (27) is installed at the bottom of the extension rod (34).

7. A device for extracting electronic grade NMP solvent from wastewater according to claim 6, characterized in that, The moving block (35) is provided with a through hole matching the limiting rod (31), and the moving block (35) is slidably connected to the limiting rod (31) via the through hole.

8. A device for extracting electronic grade NMP solvent from wastewater according to claim 6, characterized in that, The arc-shaped bin (22) is in a communicating state with the drainage pipe (7), and the width of the paging plate (33) is smaller than the width of the inner wall of the drainage pipe (7).

9. A device for extracting electronic grade NMP solvent from wastewater according to claim 6, characterized in that, The center of the arc-shaped bin (22) is coaxial with the center of the second rotation axis (23).

10. A device for extracting electronic grade NMP solvent from wastewater according to claim 6, characterized in that: The width of the guide plate (28) is equal to the width of the drainage pipe (7).

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