A kind of N-methylpyrrolidone filtering and purification device

Abstract

The present invention discloses an N-methylpyrrolidone filtering and purification device, and relates to the technical field of liquid filtering devices. An N-methylpyrrolidone filtering and purification device comprises a storage tank, a feed port is arranged on the upper side of the storage tank, a fixing frame is fixedly connected in the storage tank, a cylindrical filter screen is embedded in the lower side of the fixing frame, a first motor whose output shaft is rotatably connected to the storage tank is fixedly connected to the lower side of the storage tank, a receiving shell rotatably connected to the output shaft of the first motor is fixedly connected to the lower side of the storage tank, an extrusion plate rotatably matched with the receiving shell is fixedly connected to the output shaft of the first motor, and the storage tank is provided with a drain port located on the lower side of the extrusion plate, a feed pipe is fixedly connected to the extrusion plate, and the feed pipe is connected to a symmetrically distributed suction pipe. The present invention absorbs impurities attached to the cylindrical filter screen through the suction pipe, so as to avoid the impurities being squeezed and difficult to clean when cleaning the impurities on the cylindrical filter screen.

Description

Technical Field

[0001] The invention relates to the technical field of liquid filtering devices, in particular to a filtering and purifying device for N-methylpyrrolidone. Background Art

[0002] N-methylpyrrolidone is an important industrial chemical produced by the reaction of γ-butyrolactone and methylamine. In the electronics industry, N-methylpyrrolidone is used to prepare semiconductor materials, optical films, and as an auxiliary material for lithium-ion battery electrodes. In addition, N-methylpyrrolidone is an aprotic solvent and can participate in the production of a variety of chemical products in other chemical industries.

[0003] In the process of preparing N-methylpyrrolidone, since one of the starting materials is methylamine, incompletely reacted methylamine or other organic amine impurities may remain in the product during the production process. If the reaction conditions are not properly controlled, the intermediate and other by-products may accumulate. These incompletely reacted methylamine, other organic amine impurities and other by-products will affect the quality of the final N-methylpyrrolidone. The impurities and by-products in N-methylpyrrolidone are filtered by a filter. The above method is easy to cause the filter to be blocked during filtering. If the scraper is simply scraped and cleaned, the impurities on the filter will be squeezed and difficult to clean. If the backwashing method is adopted, the impurities and by-products are difficult to collect. Summary of the invention

[0004] In order to overcome the shortcomings mentioned in the above background technology, the present invention provides a device for filtering and purifying N-methylpyrrolidone.

[0005] The technical solution of the present invention is: an N-methylpyrrolidone filtering and purification device, comprising a storage tank, a feed port is arranged on the upper side of the storage tank, a fixing frame is fixedly connected inside the storage tank, a cylindrical filter screen is embedded in the lower side of the fixing frame, a first motor whose output shaft is rotatably connected to the storage tank is fixedly connected to the lower side of the storage tank, a receiving shell rotatably connected to the output shaft of the first motor is fixedly connected to the lower side of the storage tank, an extrusion plate rotatably matched with the receiving shell is fixedly connected to the output shaft of the first motor, the storage tank is provided with a drain port located on the lower side of the extrusion plate, and the extrusion plate is fixedly connected to a feed pipe that runs through the fixing frame , a conical filter is embedded in one end of the feed pipe located at the lower side of the fixed frame, a sealing tube is rotatably connected in the feed pipe, a second motor is fixedly connected in the sealing tube, an impeller is fixedly connected to the output shaft of the second motor, the feed pipe is connected to a symmetrically distributed suction pipe, a sealing plate is rotatably connected in the suction pipe, a push plate slidably connected to the suction pipe is fixedly connected to the side of the sealing plate away from the sealing tube, the push plate cooperates with the cylindrical filter, a detection mechanism for detecting whether the cylindrical filter is blocked is provided on the feed pipe, and a recoil mechanism for cleaning impurities adhered to the cylindrical filter is provided on the feed pipe.

[0006] According to a further preferred embodiment, the feed pipe and the sealing pipe are both provided with evenly distributed connecting holes on one side located inside the fixing frame, the sealing pipe is sealingly matched with the connecting holes on the feed pipe, the feed pipe and the sealing pipe are both provided with symmetrically distributed and mutually sealingly matched arc-shaped notches on one side located outside the fixing frame, the conical filter is located between the feed pipe and the sealing pipe, and the conical filter is located at the arc-shaped notch of the feed pipe.

[0007] According to a further preferred embodiment, the suction pipe and the sealing plate are both provided with axially distributed through holes on a side away from the sealing pipe, and the through holes therebetween are sealed and matched, the symmetrically distributed suction pipes are both connected to the feed pipes, and the connecting points between the suction pipe and the feed pipe are sealed and matched with the connecting holes on the sealing pipe.

[0008] According to a further preferred embodiment, the detection mechanism includes a sliding rod, which is spline-connected to the feed pipe and cooperates with the sealing tube for sliding limit, a first spring is connected between the sliding rod and the sealing tube, one end of the sliding rod outside the feed pipe is fixedly connected to a cross bar, the cross bar is fixedly connected to a float, the sliding rod is fixedly connected to a limit rod, the sealing plate is fixedly connected to a rotating rod, the rotating rod is rotatably connected to the suction pipe, and the rotating rod cooperates with the limit rod for limited rotation.

[0009] According to a further preferred embodiment, the recoil mechanism includes symmetrically distributed L-shaped tubes, which are all connected to the lower side of the feed tube, and the connection between the L-shaped tube and the feed tube is sealed with the lower portion of the sealing tube. A partition is rotatably connected to the vertical end of the L-shaped tube, and the partition is provided with axially distributed through holes. A detection rod is slidably connected to the partition, and the detection rod is spline-connected to the adjacent L-shaped tube. A buoyancy detection ball is provided at the upper end of the detection rod, and a second spring is connected between the detection rod and the adjacent partition. Axially distributed nozzles are provided on the side of the L-shaped tube close to the cylindrical filter, and the axially distributed nozzles are respectively sealed with adjacent partitions.

[0010] A further preferred scheme also includes an adjusting mechanism, which is arranged on the feed pipe, and is used to detect the content of the solution in the fixed frame. The adjusting mechanism includes a fixed plate, and the fixed plate is fixedly connected to the upper part of the outer side of the feed pipe. A hydraulic pipe is fixedly connected between the fixed plate and the feed port, and a detection ball is slidably connected to one end of the hydraulic pipe close to the fixed plate, and a third spring is fixedly connected between the detection ball and the fixed plate. An adjusting rod is slidably connected in the hydraulic pipe, and one end of the adjusting rod located outside the hydraulic pipe is slidably connected to the feed port. An adjusting block is rotatably connected in the feed port, and the adjusting block is limitedly matched with the adjusting rod. A stopper is fixed in the feed port, and the stopper is sealingly matched with the adjusting block.

[0011] In a further preferred embodiment, the density of the floating ball, the buoyancy detection ball at the upper end of the detection rod and the detection ball are all less than the density of the solution.

[0012] A further preferred embodiment further includes a separation mechanism, which is arranged at the upper part of the storage tank, and is used to separate bubbles in the solution, and the separation mechanism includes a third motor, and the third motor is fixedly connected to the storage tank, and the upper part of the storage tank is rotatably connected to a sliding shaft, and the output shaft of the third motor and the sliding shaft are driven by a pulley and a belt, and the sliding shaft is slidably connected to a rotating shaft, and the rotating shaft is fixedly connected to uniformly distributed spacers, and the spacers are fan-shaped frames, and holes are provided on one side of the spacers close to the rotating shaft, and a blanking plate is fixedly connected to the lower part of the spacer, and the blanking plate is provided with uniformly distributed through holes, and the storage tank is filled with liquid. A material storage shell is fixedly connected to the upper part, the material storage shell is provided with evenly distributed through holes, and the aperture of the through holes on the material storage shell is the same as the aperture of the through holes on the unloading plate, the spacer is rotatably connected to the material storage shell, the unloading plate is sealed with the material storage shell, the material storage shell is fixed with a separation tank, the separation tank is provided with a hole, the spacer is sealed with the separation tank, a discharge pipe is connected between the middle part of the material storage shell and the storage tank, the connecting port of the material storage shell is located in the separation tank, a vibration mechanism for improving the efficiency of eliminating bubbles in the solution is provided on the storage tank, and a monitoring mechanism for monitoring whether the spacer is full of solution is provided on the sliding shaft.

[0013] In a further preferred embodiment, the vibration mechanism includes a vibration motor, the vibration motor is fixedly connected to the upper part of the storage tank, the output shaft of the vibration motor is fixedly connected to a vibration frame, the vibration frame is fixedly connected to a rotating shaft, the rotating shaft is rotatably connected to a vibration plate, and the vibration plate cooperates with the spacer frame.

[0014] According to a further preferred embodiment, the monitoring mechanism comprises a detection rod, the detection rod is rotatably connected to the sliding shaft, the storage tank is fixedly connected to a limiting column, the detection rod is slidably connected to the limiting column, and a fourth spring is fixedly connected between the detection rod and the storage tank.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] 1. The present invention absorbs the impurities attached to the cylindrical filter screen through the suction pipe, thereby preventing the impurities from being squeezed and difficult to clean when cleaning the impurities on the cylindrical filter screen.

[0017] 2. The present invention uses a float to detect whether the cylindrical filter is blocked, so that the suction pipe can only suck and clean the cylindrical filter when it is blocked, avoiding continuous suction of the solution near the cylindrical filter to reduce the filtering efficiency.

[0018] 3. The present invention sprays the filtered solution from the outside to the inside of the cylindrical filter screen through the nozzle on the L-shaped tube, accelerates the separation of impurities and the cylindrical filter screen to assist the cleaning of the suction pipe and improve the cleaning efficiency.

[0019] 4. The present invention gradually delivers the solution to the fixing frame through the through holes of different positions and apertures opened on the blanking plate, thereby preventing bubbles from being mixed in the solution and causing the bubbles to adhere to the cylindrical filter screen and affect the filtration efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0021] Figure 2 It is a three-dimensional structural cross-sectional view of the storage tank and the fixing frame of the present invention;

[0022] Figure 3 It is a schematic diagram of the three-dimensional structure of the second motor, the impeller and the suction pipe of the present invention;

[0023] Figure 4 It is a three-dimensional structural schematic diagram of the suction pipe, the sealing plate and the push plate of the present invention;

[0024] Figure 5 It is a three-dimensional structural schematic diagram of the cross bar, the floating ball and the limiting rod of the present invention;

[0025] Figure 6 It is a schematic diagram of the three-dimensional structure of the feed pipe, the sliding rod and the first spring of the present invention;

[0026] Figure 7 It is a schematic diagram of the three-dimensional structure of the push plate, the limit rod and the rotating rod of the present invention;

[0027] Figure 8 It is a three-dimensional structural schematic diagram of the L-shaped tube, the second spring and the nozzle of the present invention;

[0028] Fig. 9 It is a three-dimensional structural schematic diagram of the L-shaped tube, the partition and the detection rod of the present invention;

[0029] Fig.10 It is a three-dimensional structural schematic diagram of the fixing plate, hydraulic pipe and detection ball of the present invention;

[0030] Fig.11 It is a three-dimensional structural schematic diagram of the fixing plate, hydraulic pipe and detection ball of the present invention;

[0031] Fig.12 It is a three-dimensional structural schematic diagram of the adjusting rod, the adjusting block and the stopper of the present invention;

[0032] Fig.13 It is a schematic diagram of the three-dimensional structure of the sliding shaft, the spacer frame and the material storage shell of the present invention;

[0033] Fig.14 It is a three-dimensional structural schematic diagram of the sliding shaft, the rotating shaft and the spacer frame of the present invention;

[0034] Fig.15It is a three-dimensional structural schematic diagram of the blanking plate, the material storage shell and the separation tank of the present invention;

[0035] Fig.16 It is a schematic diagram of the three-dimensional structure of the material storage shell, the separation tank and the vibration motor of the present invention;

[0036] Fig.17 It is a three-dimensional structural schematic diagram of the vibration frame, the rotating shaft and the vibration plate of the present invention;

[0037] Fig.18 It is a schematic diagram of the three-dimensional structure of the detection rod, the limiting column and the fourth spring of the present invention.

[0038] Figure numbers: 101, storage tank, 102, feed port, 103, fixing frame, 104, cylindrical filter, 105, first motor, 106, receiving shell, 107, extrusion plate, 108, feed pipe, 109, conical filter, 110, sealing pipe, 111, second motor, 112, impeller, 113, suction pipe, 114, sealing plate, 115, push plate, 2, detection mechanism, 201, sliding rod, 202, first spring, 203, cross bar, 204, floating ball, 205, limit rod, 206, rotating rod, 3, recoil mechanism, 301, L-shaped tube, 302, partition, 303, detection rod, 304, second Spring, 305, nozzle, 4, adjusting mechanism, 401, fixing plate, 402, hydraulic pipe, 403, detection ball, 404, third spring, 405, adjusting rod, 406, adjusting block, 407, stopper, 5, separation mechanism, 501, third motor, 502, sliding shaft, 503, rotating shaft, 504, spacer, 505, unloading plate, 506, material storage shell, 507, separation tank, 508, discharge pipe, 6, vibration mechanism, 601, vibration motor, 602, vibration frame, 603, rotating shaft, 604, vibration plate, 7, monitoring mechanism, 701, detection rod, 702, limiting column, 703, fourth spring. DETAILED DESCRIPTION

[0039] The preferred technical solutions of the present invention are described in detail below with reference to the accompanying drawings.

[0040] Embodiment 1: A device for filtering and purifying N-methylpyrrolidone, such as Figure 1-Figure 4As shown, it includes a storage tank 101, a feed port 102 is arranged on the left part of the upper side of the storage tank 101, a fixing frame 103 which is wide at the top and narrow at the bottom is fixedly connected in the storage tank 101, a cylindrical filter screen 104 is embedded in the lower side of the fixing frame 103, a first motor 105 which is fixedly connected to the lower side of the storage tank 101 with an output shaft which is rotatably connected to the storage tank 101, a receiving shell 106 which is rotatably connected to the output shaft of the first motor 105 is fixedly connected to the lower side of the storage tank 101, an extrusion plate 107 which is rotatably matched with the receiving shell 106 is fixedly connected to the output shaft of the first motor 105, a drain port is arranged on the lower side of the extrusion plate 107, a feed pipe 108 which passes through the fixing frame 103 is fixedly connected to the extrusion plate 107, and the feed pipe 108 which passes through the fixing frame 103 is fixedly connected to the extrusion plate 107. The side of the fixed frame 103 is provided with evenly distributed communicating holes, the side of the feed pipe 108 outside the fixed frame 103 is provided with two arc-shaped notches, one end of the feed pipe 108 located at the lower side of the fixed frame 103 is embedded with a conical filter 109, the feed pipe 108 is rotatably connected with a sealing tube 110, the side of the sealing tube 110 located in the fixed frame 103 is provided with evenly distributed communicating holes, the sealing tube 110 is sealed with the communicating holes on the feed pipe 108, and the solution enters the sealing tube 110, and the side of the sealing tube 110 outside the fixed frame 103 is provided with two arc-shaped notches, the arc-shaped notches on the feed pipe 108 and the sealing tube 110 are of the same size, and the two arc-shaped notches of the two are in a ten-degree angle. The arc-shaped notches on the feed pipe 108 and the sealing pipe 110 are blocked and sealed by the cooperation of the two. The conical filter screen 109 is located between the feed pipe 108 and the sealing pipe 110, and the conical filter screen 109 is located at the arc-shaped notch of the feed pipe 108, and is used to filter impurities at the arc-shaped notch. A second motor 111 is fixedly connected to the upper side of the sealing pipe 110, and an impeller 112 is fixedly connected to the output shaft of the second motor 111. The feed pipe 108 is connected to two suction pipes 113 symmetrically distributed on the left and right. The symmetrically distributed suction pipes 113 are all connected to the feed pipe 108, and the connection between the suction pipe 113 and the feed pipe 108 is sealed and matched with the connecting hole on the sealing pipe 110, and a sealing plate is rotatably connected in the suction pipe 113 114, an arc-shaped groove gradually approaching the cylindrical filter screen 104 is formed on the suction pipe 113, and the suction pipe 113 and the sealing plate 114 are both provided with axially distributed through holes on the side away from the sealing tube 110, and when the through holes of the two overlap with each other, the solution can be discharged through here, and a push plate 115 slidably connected to the suction pipe 113 is fixedly connected to the side of the sealing plate 114 away from the sealing tube 110, and the push plate 115 slides in the arc-shaped groove on the suction pipe 113, and the push plate 115 is used to clean impurities on the cylindrical filter screen 104, and a detection mechanism 2 for detecting whether the cylindrical filter screen 104 is blocked is provided on the feed pipe 108, and a recoil mechanism 3 for cleaning impurities adhered to the cylindrical filter screen 104 is provided on the feed pipe 108.

[0041] like Figure 5-Figure 7As shown, the detection mechanism 2 includes a sliding rod 201, which is spline-connected to the upper side of the feed pipe 108, and a spiral groove is arranged on the sliding rod 201, a convex column is arranged on the upper side of the sealing tube 110, and the convex column on the upper side of the sealing tube 110 is located in the spiral groove on the sliding rod 201 and slides, a first spring 202 is connected between the sliding rod 201 and the sealing tube 110, a cross bar 203 is fixedly connected to the upper end of the sliding rod 201, and two floats 204 are fixedly connected to the cross bar 203, and the density of the two floats 204 is less than the density of the solution, and is used to detect the height of the solution, the sliding rod 201 is fixedly connected to the limit rod 205, and the sealing plate 114 is fixedly connected to the rotating rod 206, and the rotating rod 206 is rotatably connected to the suction tube 113, a spiral groove is arranged on the rotating rod 206, and the limit rod 205 is provided with a convex column, and the convex column on the limit rod 205 is located in the spiral groove on the rotating rod 206 and slides.

[0042] like Figure 8 and Fig. 9 As shown, the recoil mechanism 3 includes two L-shaped tubes 301 symmetrically distributed on the left and right sides, and the two L-shaped tubes 301 symmetrically distributed on the left and right sides are both connected to the lower side of the feed tube 108. When the arc-shaped notches on the feed tube 108 and the sealing tube 110 overlap, the connection between the L-shaped tube 301 and the feed tube 108 is blocked and sealed by the lower part of the sealing tube 110. A partition 302 is rotatably connected to the vertical end of the L-shaped tube 301. The partition 302 is provided with axially distributed through holes. The partition 302 is limitedly slidably connected to the detection rod 303. The partition 302 is provided with a convex column. The detection rod 303 03 is provided with a spiral groove, the convex column on the partition 302 is located in the spiral groove on the detection rod 303 and slides, the detection rod 303 is spline-connected with the adjacent L-shaped tube 301, and a buoyancy detection ball is provided at the upper end of the detection rod 303. The density of the buoyancy detection ball is less than the density of the solution and is used to detect the height of the solution. A second spring 304 is connected between the detection rod 303 and the adjacent partition 302, and an axially distributed nozzle 305 is provided on one side of the L-shaped tube 301 close to the cylindrical filter 104, and the axially distributed nozzle 305 is respectively sealed with the adjacent partition 302.

[0043] When it is necessary to filter N-methylpyrrolidone, the connecting hole on the sealing tube 110 is connected to the connecting hole on the feed pipe 108, the connecting hole connecting the suction tube 113 to the feed pipe 108 is not connected to the connecting hole on the sealing tube 110, the sealing tube 110 seals the connecting hole between the L-shaped tube 301 and the feed pipe 108, and the sealing tube 110 and the feed pipe 108 do not seal the conical filter screen 109.

[0044] The staff then connected the N-methylpyrrolidone delivery pipeline to the feed port 102, and then continued to pass the N-methylpyrrolidone to be filtered (hereinafter referred to as the solution) into the storage tank 101. The solution entering the storage tank 101 first entered the fixed frame 103, and then passed through the columnar filter 104 into the space between the storage tank 101 and the fixed frame 103, and was discharged from the storage tank 101 through the drain port on the storage tank 101.

[0045] In the above process, a small portion of the solution entering the fixed frame 103 passes through the connecting holes on the sealing tube 110 and the feeding tube 108, enters the sealing tube 110, and passes through the conical filter 109 and the gap between the sealing tube 110 and the lower part of the feeding tube 108 to enter between the storage tank 101 and the fixed frame 103, and then repeats the above steps to be discharged from the storage tank 101.

[0046] During the process of introducing the solution into the storage tank 101, the staff starts the first motor 105 and the second motor 111. The output shaft of the first motor 105 drives the two suction pipes 113 to rotate through the extrusion plate 107 and the feed pipe 108. The suction pipe 113 drives the push plate 115 to rotate through the sealing plate 114. The two push plates 115 rotate to stir the solution in the fixed frame 103, pushing the solution in the fixed frame 103 close to the cylindrical filter screen 104, thereby accelerating the filtering speed of the solution by the cylindrical filter screen 104. The output shaft of the second motor 111 drives the impeller 112 to rotate to extract the solution, thereby accelerating the speed at which the solution enters the sealing tube 110.

[0047] In the process of introducing the solution into the storage tank 101, the filtered solution gathers between the storage tank 101 and the fixed frame 103. The rising liquid level drives the detection rod 303 to move upward through the buoyancy detection ball and compresses the second spring 304. The detection rod 303 squeezes the protrusion on the partition 302 through the slide groove, driving the partition 302 to rotate, so that the through hole on the L-shaped tube 301 is disconnected from the through hole on the partition 302.

[0048] During the rotation of the above-mentioned feed pipe 108, the feed pipe 108 squeezes the sliding rod 201 through the spline, driving the sliding rod 201 to rotate clockwise, and the sliding rod 201 squeezes the protrusion on the sealing tube 110 through the sliding groove, driving the sealing tube 110 to rotate synchronously, thereby avoiding misalignment between the connecting hole on the sealing tube 110 and the connecting hole on the feed pipe 108.

[0049] After filtering the solution for a period of time, impurities in the solution accumulate on the inner side of the cylindrical filter 104, and part of the cylindrical filter 104 is blocked. The amount of solution entering the space between the storage tank 101 and the fixed frame 103 through the cylindrical filter 104 is reduced, and the liquid level of the solution in the fixed frame 103 rises, pushing the float 204 to move upward. The float 204 drives the sliding rod 201 to move upward through the cross bar 203 and compresses the first spring 202. The sliding rod 201 moves upward and squeezes the protrusion on the sealing tube 110 through the slide groove, driving the sealing tube 110 to rotate counterclockwise. After the sealing tube 110 rotates, the connecting hole on the sealing tube 110 is no longer connected to the connecting hole on the feeding tube 108, and the connecting hole of the suction tube 113 connected to the feeding tube 108 is connected to the connecting hole on the sealing tube 110.

[0050] During the movement of the sliding rod 201, the sliding rod 201 drives the limiting rod 205 to move, and the limiting rod 205 moves upward, moves in the slide grooves on the two rotating rods 206 through the convex rod, and squeezes the slide grooves, driving the two sealing plates 114 to rotate. When the sealing plate 114 rotates to the maximum angle, the through hole on the sealing plate 114 is connected to the through hole on the suction tube 113, and the solution can only enter the sealing tube 110 through the through hole on the suction tube 113.

[0051] During the rotation of the sealing plate 114, the sealing plate 114 drives the push plate 115 to rotate clockwise. After the sealing plate 114 rotates to the maximum angle, the push plate 115 contacts the cylindrical filter screen 104 and scrapes off impurities on the inner side of the cylindrical filter screen 104, thereby accelerating the cleaning of impurities.

[0052] When the sliding rod 201 moves, the sealing tube 110 no longer seals the connecting hole between the L-shaped tube 301 and the feeding tube 108. The sealing tube 110 and the feeding tube 108 seal the conical filter 109. The solution enters the L-shaped tube 301 after being filtered through the conical filter 109. The amount of solution entering the space between the storage tank 101 and the fixing frame 103 through the columnar filter 104 is reduced, and the liquid level of the solution between the storage tank 101 and the fixing frame 103 drops. The second spring 304 pushes the detection rod 303 to move downward and brings The dynamic buoyancy detection ball moves downward, and the detection rod 303 moves downward to drive the partition 302 to rotate. The through hole on the L-shaped tube 301 is connected with the through hole on the partition 302. The impeller 112 rotates to draw the solution through the suction tube 113 into the sealing tube 110, and enters the L-shaped tube 301 after being filtered through the conical filter 109. The solution is sprayed from the nozzle 305 on the L-shaped tube 301 to the cylindrical filter 104, and the impurities are sprayed to the inner side of the cylindrical filter 104 to prevent some impurities from being squeezed and difficult to clean when scraped off by the push plate 115.

[0053] After the cylindrical filter 104 is cleaned, the liquid level of the solution in the fixed frame 103 drops, and the first spring 202 drives the sealing tube 110 to rotate through the sliding rod 201, so that the connecting hole on the sealing tube 110 is connected with the connecting hole on the feeding tube 108 again, and the solution enters the sealing tube 110 through the feeding tube 108 again, and the connecting hole between the suction tube 113 and the feeding tube 108 and the connecting hole on the sealing tube 110 are closed again, and the sealing tube 110 and the feeding tube 108 stop sealing the conical filter 109, and the sealing tube 110 seals the through hole between the L-shaped tube 301 and the feeding tube 108.

[0054] While the sliding rod 201 moves, the liquid level of the solution between the storage tank 101 and the fixed frame 103 rises, and the solution drives the detection rod 303 to move upward by pushing the buoyancy detection ball and compresses the second spring 304. The detection rod 303 drives the partition 302 to rotate, and the through hole on the L-shaped tube 301 is no longer connected with the through hole on the partition 302.

[0055] Embodiment 2: Based on embodiment 1, Figure 10-12 As shown, it also includes an adjustment mechanism 4, which is arranged on the feed pipe 108. The adjustment mechanism 4 is used to detect the content of the solution in the fixed frame 103. The adjustment mechanism 4 includes a fixed plate 401, which is fixedly connected to the upper part of the outer side of the feed pipe 108. A hydraulic pipe 402 is fixedly connected between the fixed plate 401 and the feed port 102. The hydraulic pipe 402 is a three-way pipe. The lower end of the hydraulic pipe 402 is slidably connected to two detection balls 403. The density of the two detection balls 403 is less than the density of the solution. There is a fixed connection between the detection ball 403 and the fixed plate 401. A third spring 404 and an adjusting rod 405 are slidably connected inside the hydraulic pipe 402. One end of the adjusting rod 405 outside the hydraulic pipe 402 is slidably connected to the feed port 102. An adjusting block 406 is rotatably connected inside the feed port 102. The adjusting block 406 is provided with a spiral groove, which slides with the spiral groove of the adjusting rod 405 located on the adjusting block 406. A stopper 407 is fixed inside the feed port 102. Four evenly distributed through holes are provided on the adjusting block 406 and the stopper 407, and the diameter of the through holes on the stopper 407 is consistent with that of the through holes on the adjusting block 406.

[0056] When the liquid level of the solution in the above-mentioned fixed frame 103 rises, the solution pushes the detection ball 403 to move upward, so that the hydraulic tube 402 is in a high-pressure state and the third spring 404 is stretched. The pressure increase in the hydraulic tube 402 pushes the adjusting rod 405 to move downward, and the lower end of the adjusting rod 405 presses the slide groove on the adjusting block 406 downward to make the adjusting block 406 rotate clockwise, so that the through hole on the adjusting block 406 and the through hole on the stop block 407 are misaligned, thereby reducing the feeding speed of the solution from the feed port 102 into the storage tank 101, and avoiding the solution in the storage tank 101 from overflowing.

[0057] When the liquid level of the solution in the above-mentioned fixed frame 103 drops, the third spring 404 pushes the detection ball 403 to move downward, so that the hydraulic pipe 402 is in a negative pressure state. The pressure reduction in the hydraulic pipe 402 drives the adjusting rod 405 to move upward, and the lower end of the adjusting rod 405 squeezes the slide groove on the adjusting block 406 upward to make the adjusting block 406 rotate counterclockwise, so that the through hole on the adjusting block 406 and the through hole on the stop block 407 are no longer misaligned, thereby restoring the feeding speed of the solution from the feed port 102 into the storage tank 101.

[0058] Embodiment 3: Based on embodiment 1, Figure 13-Figure 15As shown, a separation mechanism 5 is also included, and the separation mechanism 5 is arranged on the upper part of the storage tank 101. The separation mechanism 5 is used to separate bubbles in the solution. The separation mechanism 5 includes a third motor 501, and the third motor 501 is fixedly connected to the left side of the upper end of the storage tank 101. The upper end of the storage tank 101 is rotatably connected with a sliding shaft 502. The output shaft on the upper side of the third motor 501 and the upper end of the sliding shaft 502 are driven by a pulley and a belt, and the sliding shaft 502 is driven to rotate counterclockwise. The sliding lower end of the sliding shaft 502 is connected to a rotating shaft 503, and the rotating shaft 503 is fixedly connected with six circumferentially distributed spacers 504, and the spacers 504 are fan-shaped, and the spacers 504 are close to the rotating shaft. A hole is provided on one side of the shaft 503, and a blanking plate 505 is fixedly connected to the lower part of the six circumferentially distributed spacers 504. The blanking plate 505 is provided with two groups of evenly distributed through holes, a group of through holes with a larger aperture is located in the middle of the blanking plate 505, and a group of through holes with a smaller aperture is located on the inner side of the fan-shaped. A storage shell 506 is fixedly connected to the upper part of the storage tank 101, and the upper side surface of the storage shell 506 is higher than the upper side surface of the spacer 504. Two groups of evenly distributed through holes are provided at the bottom of the storage shell 506, a group of through holes with a larger aperture is located in the middle of the left side of the storage shell 506, and a group of through holes with a smaller aperture is located at the front of the left side of the storage shell 506. The upper side surface of the storage shell 506 is an inclined surface. , and the inner side of the material storage shell 506 is lower, and the apertures of the two groups of through holes on the material storage shell 506 are the same as the apertures of the two groups of through holes on the blanking plate 505, the rotating shaft 503 drives the six circumferentially distributed spacers 504 to rotate, and the two groups of through holes are used to gradually put the solution in the spacers 504 into the fixed frame 103, the outer sides of the six circumferentially distributed spacers 504 are all rotatably connected to the material storage shell 506, the lower side of the blanking plate 505 is sealed with the material storage shell 506, the middle part of the upper side of the material storage shell 506 is fixedly connected with a separation tank 507, the middle part of the lower side of the material storage shell 506 is connected to the storage tank 101 with a discharge pipe 508, and the spacers 504 are close to the separation tank 107. A hole is opened at the lower part of one side of the tank 507, a hole is opened at the front part of the right side of the separation tank 507, the spacer frame 504 and the separation tank 507, and the spacer frame 504 and the separation tank 507 are sealed together, and are used to collect the remaining solution in the spacer frame 504 into the separation tank 507 when the holes on the spacer frame 504 and the separation tank 507 are connected. The connecting port of the storage shell 506 is located at the bottom of the separation tank 507, and is used to discharge the solution collected in the separation tank 507. A vibration mechanism 6 for improving the efficiency of eliminating bubbles in the solution is provided on the storage tank 101, and a monitoring mechanism 7 for monitoring whether the spacer frame 504 is full of solution is provided on the sliding shaft 502.

[0059] like Fig.16 and Fig.17As shown, the vibration mechanism 6 includes a vibration motor 601, which is fixedly connected to the rear part of the upper surface of the storage tank 101, and the output shaft on the lower side of the vibration motor 601 is fixedly connected to a vibration frame 602, and the vibration frame 602 is fixedly connected to four axially distributed rotating shafts 603, and the four axially distributed rotating shafts 603 are respectively rotatably connected to vibration plates 604, and the vibration plates 604 cooperate with the spacer frame 504, and the vibration plates 604 are used to knock on the side wall of the spacer frame 504 that rotates to the lower side of the vibration motor 601 to accelerate the rupture and floating of bubbles in the solution in the spacer frame 504.

[0060] like Fig.18 As shown, the monitoring mechanism 7 includes a detection rod 701, which is rotatably connected to the lower part of the sliding shaft 502. The right part of the upper surface of the storage tank 101 is fixedly connected to the limiting column 702. The detection rod 701 is slidably connected to the limiting column 702. A fourth spring 703 is fixedly connected between the upper surface of the detection rod 701 and the upper surface of the inner side of the storage tank 101. The fourth spring 703 is wound around the surface of the limiting column 702. The detection rod 701 is used to push the sliding shaft 502 upward when the solution in the right-side spacer 504 is full, so that the grinding wheel on the upper side of the sliding shaft 502 contacts the grinding wheel on the upper output shaft of the third motor 501, thereby driving the rotating shaft 503 to rotate, so that the counterclockwise rotation drives the empty spacer 504 to move to the right.

[0061] In the process of introducing the solution into the storage tank 101, the solution first enters the spacer 504 on the right side, and the liquid level of the solution in the spacer 504 gradually rises. The solution pushes the detection rod 701 to move upward and compresses the fourth spring 703. The detection rod 701 drives the sliding shaft 502 to move upward. At this time, the output shaft of the third motor 501 drives the sliding shaft 502 to rotate counterclockwise through the grinding wheel group, and the sliding shaft 502 drives the rotating shaft 503 to rotate. The rotating shaft 503 drives the six spacers 504 to rotate 60 degrees counterclockwise.

[0062] After all six spacers 504 rotate, there is no solution in the spacer 504 on the right. At this time, the fourth spring 703 pushes the detection rod 701 to move downward, and the detection rod 701 drives the sliding shaft 502 to move downward. The output shaft of the third motor 501 no longer drives the sliding shaft 502 to rotate through the grinding wheel group. After the solution fills the new spacer 504 again, repeat the above process.

[0063] After the above-mentioned spacer frame 504 rotates, the staff starts the vibration motor 601, and the output shaft of the vibration motor 601 drives the vibration frame 602 to rotate counterclockwise, and the vibration frame 602 drives the vibration plate 604 to rotate, and continuously knocks on the side wall of the rear spacer frame 504 to accelerate the bursting and floating of bubbles in the solution in the spacer frame 504. When the vibration plate 604 knocks on the spacer frame 504, the vibration plate 604 rotates along the rotation axis 603 under the push of the spacer frame 504.

[0064] After the above-mentioned right side spacer 504 is filled with solution again, the output shaft of the third motor 501 drives the sliding shaft 502 to rotate again through the grinding wheel group, so that the six spacer frames 504 rotate 60 degrees again. When the six spacer frames 504 rotate for the third time, the larger connecting hole on the left side unloading plate 505 is connected with the larger diameter through hole on the storage shell 506, and most of the solution in the left side spacer frame 504 is discharged into the fixed frame 103. Since the upper side surface of the unloading plate 505 is an inclined surface, the remaining solution gathers on the inner side of the spacer frame 504.

[0065] After the above-mentioned right side spacer 504 is filled with solution again, the six spacer frames 504 are rotated 60 degrees again, and the left side spacer frame 504 is rotated to the right front side again, and the smaller connecting hole on the unloading plate 505 is connected with the through hole with smaller diameter on the storage shell 506, and the lower layer of the remaining solution is discharged into the fixed frame 103. As the six spacer frames 504 rotate again, the spacer frame 504 on the right front side is rotated to the left front side, and the hole on the inner side of this spacer frame 504 is connected with the hole on the separation tank 507, and the remaining solution is discharged into the separation tank 507 and waits for the filling after the next rotation. After the solution enters the separation tank 507, it flows out of the storage tank 101 along the discharge pipe 508.

[0066] It should be understood that this embodiment is only used to illustrate the present invention and is not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope limited by the appended claims of the application.

Claims

1. A device for filtering and purifying N-methylpyrrolidone, characterized in that: The invention comprises a storage tank (101), wherein a feed port (102) is arranged on the upper side of the storage tank (101), a fixing frame (103) is fixedly connected inside the storage tank (101), a cylindrical filter screen (104) is embedded in the lower side of the fixing frame (103), a first motor (105) is fixedly connected to the lower side of the storage tank (101) with an output shaft rotatably connected to the storage tank (101), a receiving shell (106) rotatably connected to the output shaft of the first motor (105) is fixedly connected to the lower side of the storage tank (101), an extrusion plate (107) rotatably matched with the receiving shell (106) is fixedly connected to the output shaft of the first motor (105), the storage tank (101) is provided with a drain port located on the lower side of the extrusion plate (107), a feed pipe (108) penetrating the fixing frame (103) is fixedly connected to the extrusion plate (107), and the feed pipe (108) is located on the fixing frame (103). 3) A conical filter screen (109) is embedded at one end of the lower side, a sealing tube (110) is rotatably connected inside the feed tube (108), a second motor (111) is fixedly connected inside the sealing tube (110), an impeller (112) is fixedly connected to the output shaft of the second motor (111), the feed tube (108) is connected to symmetrically distributed suction tubes (113), a sealing plate (114) is rotatably connected inside the suction tube (113), and the sealing plate (114) is 4) A push plate (115) slidably connected to the suction pipe (113) is fixedly connected to the side away from the sealing pipe (110), the push plate (115) cooperates with the cylindrical filter screen (104), the feed pipe (108) is provided with a detection mechanism (2) for detecting whether the cylindrical filter screen (104) is blocked, and the feed pipe (108) is provided with a recoil mechanism (3) for cleaning impurities adhered to the cylindrical filter screen (104); The feeding pipe (108) and the sealing pipe (110) are both provided with evenly distributed communication holes on one side located inside the fixing frame (103); the sealing pipe (110) and the communication holes on the feeding pipe (108) are sealed and matched; the feeding pipe (108) and the sealing pipe (110) are both provided with symmetrically distributed arc-shaped notches that are sealed and matched with each other on one side located outside the fixing frame (103); the conical filter screen (109) is located between the feeding pipe (108) and the sealing pipe (110), and the conical filter screen (109) is located at the arc-shaped notch of the feeding pipe (108); The suction pipe (113) and the sealing plate (114) are both provided with axially distributed through holes on the side away from the sealing pipe (110), and the through holes between the two are sealed and matched, the symmetrically distributed suction pipes (113) are all connected to the feed pipe (108), and the connection point between the suction pipe (113) and the feed pipe (108) is sealed and matched with the connecting hole on the sealing pipe (110); The detection mechanism (2) comprises a sliding rod (201), the sliding rod (201) is spline-connected to the feed tube (108), and the sliding rod (201) and the sealing tube (110) are slidably limited in cooperation, a spiral groove is provided on the sliding rod (201), a convex column is provided on the upper side of the sealing tube (110), the convex column on the upper side of the sealing tube (110) is located in the spiral groove on the sliding rod (201) and slides, a first spring (202) is connected between the sliding rod (201) and the sealing tube (110), and one end of the sliding rod (201) located outside the feed tube (108) is fixed The cross bar (203) is connected to a floating ball (204) fixedly connected to the cross bar (203), the density of the floating ball (204) is less than the density of the solution, the sliding rod (201) is fixedly connected to a limiting rod (205), the sealing plate (114) is fixedly connected to a rotating rod (206), the rotating rod (206) is rotatably connected to the suction pipe (113), and the rotating rod (206) and the limiting rod (205) are limitedly rotatably matched, the rotating rod (206) is provided with a spiral groove, the limiting rod (205) is provided with a convex column, and the convex column on the limiting rod (205) is located in the spiral groove on the rotating rod (206) and slides; The recoil mechanism (3) comprises symmetrically distributed L-shaped tubes (301), the symmetrically distributed L-shaped tubes (301) are all connected to the lower side of the feed tube (108), and the connection point between the L-shaped tube (301) and the feed tube (108) is sealed with the lower part of the sealing tube (110), a partition (302) is rotatably connected inside the vertical end of the L-shaped tube (301), the partition (302) is provided with axially distributed through holes, the partition (302) is limitedly slidably connected to a detection rod (303), the partition (302) is provided with a convex column, the detection rod (303) is provided with a spiral groove, and the partition The convex column on the (302) is located in the spiral groove on the adjacent detection rod (303) and slides, and the detection rod (303) is spline-connected with the adjacent L-shaped tube (301). A buoyancy detection ball is arranged at the upper end of the detection rod (303), and the density of the buoyancy detection ball is less than the density of the solution. A second spring (304) is connected between the detection rod (303) and the adjacent partition (302). A side of the L-shaped tube (301) close to the cylindrical filter (104) is provided with axially distributed nozzles (305), and the axially distributed nozzles (305) are respectively sealed and matched with the adjacent partitions (302); When it is necessary to filter N-methylpyrrolidone, the communication hole on the sealing tube (110) is connected to the communication hole on the feeding tube (108), the communication hole between the suction tube (113) and the feeding tube (108) is not connected to the communication hole on the sealing tube (110), the sealing tube (110) seals the communication hole between the L-shaped tube (301) and the feeding tube (108), and the sealing tube (110) and the feeding tube (108) do not seal the conical filter screen (109); The solution entering the storage tank (101) first enters the fixing frame (103), and then passes through the columnar filter (104) and enters between the storage tank (101) and the fixing frame (103); When a part of the columnar filter (104) is blocked, the liquid level of the solution in the fixed frame (103) rises, pushing the float (204) to move upward, and the float (204) drives the sliding rod (201) to move upward through the cross rod (203) and compresses the first spring (202). The sliding rod (201) moves upward and squeezes the protrusion on the sealing tube (110) through the slide groove, driving the sealing tube (110) to rotate. The connecting hole on the sealing tube (110) is no longer connected to the connecting hole on the feeding tube (108), and the connecting hole between the suction tube (113) and the feeding tube (108) is connected to the connecting hole on the sealing tube (110). The sealing tube (110) no longer seals the connecting hole between the L-shaped tube (301) and the feeding tube (108); The sliding rod (201) drives the limiting rod (205) to move, and the limiting rod (205) moves upward and moves in the slide grooves on the two rotating rods (206) through the convex rod, driving the two sealing plates (114) to rotate. When the sealing plates (114) rotate to the maximum angle, the through holes on the sealing plates (114) are connected with the through holes on the suction pipe (113), and the push plate (115) contacts the cylindrical filter screen (104) and scrapes away impurities on the inner side of the cylindrical filter screen (104); When a part of the cylindrical filter screen (104) is clogged, the liquid level of the solution between the storage tank (101) and the fixing frame (103) drops, the second spring (304) pushes the detection rod (303) to move downward and drives the buoyancy detection ball to move downward, the detection rod (303) moves downward and drives the partition (302) to rotate, the through hole on the L-shaped tube (301) is connected with the through hole on the partition (302), and the solution is sprayed from the nozzle (305) on the L-shaped tube (301) toward the cylindrical filter screen (104).

2. The N-methylpyrrolidone filtering and purification device according to claim 1, characterized in that: The apparatus further comprises an adjusting mechanism (4), the adjusting mechanism (4) being arranged on the feeding pipe (108), the adjusting mechanism (4) being used for detecting the content of the solution in the fixing frame (103), the adjusting mechanism (4) comprising a fixing plate (401), the fixing plate (401) being fixedly connected to the upper part of the outer side of the feeding pipe (108), a hydraulic pipe (402) being fixedly connected between the fixing plate (401) and the feeding port (102), a detection ball (403) being slidably connected to one end of the hydraulic pipe (402) close to the fixing plate (401), the detection ball (403) being A third spring (404) is fixedly connected between the hydraulic pipe (403) and the fixed plate (401), an adjusting rod (405) is slidably connected inside the hydraulic pipe (402), one end of the adjusting rod (405) located outside the hydraulic pipe (402) is slidably connected to the feed port (102), an adjusting block (406) is rotatably connected inside the feed port (102), the adjusting block (406) and the adjusting rod (405) are limitedly matched, a stopper (407) is fixedly connected inside the feed port (102), and the stopper (407) and the adjusting block (406) are sealed and matched.

3. The N-methylpyrrolidone filtering and purification device according to claim 2, characterized in that: The density of the detection balls (403) is lower than the density of the solution.

4. The N-methylpyrrolidone filtering and purification device according to claim 1, characterized in that: The storage tank (101) further comprises a separation mechanism (5), the separation mechanism (5) being arranged on the upper part of the storage tank (101), the separation mechanism (5) being used to separate bubbles in the solution, the separation mechanism (5) comprising a third motor (501), the third motor (501) being fixedly connected to the storage tank (101), the upper part of the storage tank (101) being rotatably connected to a sliding shaft (502), the output shaft of the third motor (501) and the sliding shaft (502) being connected via a pulley and a belt transmission. The sliding shaft (502) is slidably connected to a rotating shaft (503), the rotating shaft (503) is fixedly connected to evenly distributed spacers (504), the spacers (504) are fan-shaped, a hole is opened on a side of the spacers (504) close to the rotating shaft (503), a blanking plate (505) is fixedly connected to the lower part of the spacers (504), the blanking plate (505) is opened with evenly distributed through holes, and a storage shell (505) is fixedly connected to the upper part of the storage tank (101). 6), the material storage shell (506) is provided with evenly distributed through holes, and the aperture of the through holes on the material storage shell (506) is the same as the aperture of the through holes on the material discharge plate (505), the spacer (504) is rotatably connected to the material storage shell (506), the material discharge plate (505) and the material storage shell (506) are sealed and matched, the material storage shell (506) is fixedly connected to a separation tank (507), the separation tank (507) is provided with holes, the spacer (504) and the separation tank (507) is sealed and matched, a discharge pipe (508) is connected between the middle part of the storage shell (506) and the storage tank (101), and the connecting port between the storage shell (506) and the discharge pipe (508) is located in the separation tank (507), and the storage tank (101) is provided with a vibration mechanism (6) for improving the efficiency of eliminating bubbles in the solution, and the sliding shaft (502) is provided with a monitoring mechanism (7) for monitoring whether the spacer (504) is full of solution.

5. The N-methylpyrrolidone filtering and purification device according to claim 4, characterized in that: The vibration mechanism (6) comprises a vibration motor (601), the vibration motor (601) is fixedly connected to the upper part of the storage tank (101), the output shaft of the vibration motor (601) is fixedly connected to a vibration frame (602), the vibration frame (602) is fixedly connected to a rotating shaft (603), the rotating shaft (603) is rotatably connected to a vibration plate (604), and the vibration plate (604) cooperates with the spacer frame (504).

6. The N-methylpyrrolidone filtering and purification device according to claim 5, characterized in that: The monitoring mechanism (7) comprises a detection rod (701), the detection rod (701) is rotatably connected to the sliding shaft (502), the storage tank (101) is fixedly connected to a limiting column (702), the detection rod (701) is slidably connected to the limiting column (702), and a fourth spring (703) is fixedly connected between the detection rod (701) and the storage tank (101).

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