Tower type high-purity nmp recovery device

Abstract

The utility model belongs to NMP recovery technical field, concretely speaking it is a tower type high -purity NMP recovery device, including fixed plate, the fixed plate top solid connection has the processing box, the processing box lateral wall is connected with the liquid inlet pipe, the processing box top is equipped with the apron, the apron bottom is equipped with two groups of connecting components, the first filter screen is installed on the connecting component, the fixed plate top solid connection has the material pump, the fixed plate one side is installed rectifying tower, the material pump is connected with processing box and rectifying tower all through the pipeline, the processing box lateral wall is equipped with the fixed component, the fixed plate is equipped with the cleaning component, the fixed plate is equipped with the jacking component, the processing box is equipped with the sealing component, through above -mentioned structure, setting processing box, the first filter screen and material pump, can filter before NMP liquid enters rectifying tower, to reduce the suspended solids impurity in NMP liquid and enter rectifying tower, lead to its produce the situation of jam.

Description

Technical Field

[0001] This utility model belongs to the field of NMP recovery technology, specifically a tower-type high-purity NMP recovery device. Background Technology

[0002] NMP, or N-methylpyrrolidone, is an organic solvent widely used in the chemical, electronics, and pharmaceutical industries. In the production process of NMP, recycling and purification is a very important process for environmental protection and resource reuse.

[0003] When recycling and reusing NMP, distillation columns are used to purify the NMP solution. Distillation columns can be divided into plate columns and packed columns. Plate columns consist of multiple layers of trays, with each tray achieving gas-liquid contact through elements such as float valves and sieves. Packed columns, on the other hand, use packing layers to provide a large surface area, allowing liquid to flow along the surface of the packing and gas to pass through the gaps between the packing. During long-term observation, it was found that the NMP solution contained a large amount of particulate suspended impurities. When these impurities entered the distillation column, they adhered to the interior, causing blockages in the internal structure.

[0004] Therefore, this utility model provides a tower-type high-purity NMP recovery device. Utility Model Content

[0005] To overcome the shortcomings of existing technologies and solve at least one of the problems mentioned in the background art, a tower-type high-purity NMP recovery device is proposed.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: A tower-type high-purity NMP recovery device of this utility model includes a fixed plate; a processing tank is fixedly connected to the top of the fixed plate; an inlet pipe is connected to the side wall of the processing tank; a cover plate is provided on the top of the processing tank; two sets of connecting components are provided at the bottom of the cover plate; a first filter screen is installed on the connecting components; a feed pump is fixedly connected to the top of the fixed plate; a distillation column is installed on one side of the fixed plate; the feed pump is connected to the processing tank and the distillation column through pipelines; a fixing component is provided on the side wall of the processing tank; a cleaning component is provided on the fixed plate; a lifting component is provided on the fixed plate; and a sealing component is provided on the processing tank. Through the above structure, with the processing tank, the first filter screen, and the feed pump, the NMP liquid can be filtered before entering the distillation column, so as to reduce the suspended impurities in the NMP liquid from entering the distillation column and causing blockage.

[0007] Preferably, the cleaning assembly includes a water tank; the water tank is fixed to the top of a fixed plate; a water pump is fixed to the top of the fixed plate; the water pump is connected to the water tank via a pipe; a diverter pipe is fixed to the output end of the water pump; a pair of water guide pipes are fixed to the inner side wall of the treatment tank; the diverter pipe is connected to the water guide pipes; multiple water outlet pipes are connected to the side wall of the water guide pipes; multiple nozzles are installed on the water outlet pipes; a drain pipe is connected to the side wall of the treatment tank; a control valve is provided on the drain pipe; and a protective component is provided on the nozzle. With the above structure, including the water tank, water pump, water outlet pipes, nozzles, and drain pipe, the first filter screen can be backwashed and cleaned periodically to reduce the likelihood of clogging caused by excessive impurities remaining on the first filter screen.

[0008] Preferably, the fixing assembly includes a pair of support plates; the pair of support plates are symmetrically hinged to the side wall of the treatment box; a screw is threadedly connected to the support plate; a wheel is fixedly connected to the top of the screw; and a pad is fixedly connected to the bottom of the screw. With the above structure, the support plates, screw, wheel and pad can facilitate the fixing and disassembly of the cover and the treatment box, so as to facilitate the disassembly and maintenance of the cover and the first filter screen in the later stage.

[0009] Preferably, the lifting assembly includes a pair of hydraulic cylinders; the pair of hydraulic cylinders are fixed to the top of the fixed plate; the hydraulic cylinders are located at the corner of the processing box; a top plate is fixed to the top of the hydraulic cylinders; a pair of protrusions are fixed to the top of the top plate; a pair of extension plates are fixed to the side wall of the cover plate; a pair of slots are provided at the bottom of the extension plates; the top plate and the extension plates form an L-shaped structure; with the above structure, the hydraulic cylinders, top plate, protrusions, extension plates and slots are provided to facilitate lifting the cover plate and the first filter screen, thereby exposing the first filter screen from the processing box, so as to facilitate the subsequent maintenance of the first filter screen.

[0010] Preferably, the connecting assembly includes a pair of top frames; the pair of top frames are fixed to the bottom of the cover plate; a sliding groove is provided in the top frame; a pair of screw holes are provided on the first filter screen; a pair of bottom frames are fixed to the bottom of the inner side of the processing box; through the above structure, the top frames, sliding grooves, and screw holes, together with bolts and nuts, can improve the convenience of installing the first filter screen on the cover plate.

[0011] Preferably, the protective component includes a sleeve; the sleeve is threadedly connected to the nozzle; a second filter screen is installed inside the sleeve; and a baffle is fixed to the side wall of the nozzle. Through the above structure, the sleeve, the second filter screen, and the baffle can protect the nozzle, thereby reducing the adhesion of impurities in NMP liquid to the nozzle and causing blockage.

[0012] The beneficial effects of this utility model are as follows:

[0013] 1. The tower-type high-purity NMP recovery device of this utility model, by setting up a processing tank, a first filter screen and a feed pump, can filter NMP liquid before it enters the distillation column, so as to reduce the suspended impurities in NMP liquid from entering the distillation column and causing blockage.

[0014] 2. The tower-type high-purity NMP recovery device of this utility model, by setting up a water tank, water pump, water outlet pipe, nozzle and drain pipe, can facilitate the periodic backflushing and cleaning of the first filter screen, so as to reduce the situation where a lot of impurities remain on the first filter screen and cause blockage. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings.

[0016] Figure 1 This is a perspective view of the present invention;

[0017] Figure 2 This is a schematic diagram of the processing box in this utility model;

[0018] Figure 3 This is a schematic diagram of the cooperation structure between the processing box and the first filter screen in this utility model;

[0019] Figure 4 This is a schematic diagram of the cooperation structure between the first filter screen and the cover plate in this utility model;

[0020] Figure 5 This is a schematic diagram of the cooperation structure between the treatment tank and the outlet pipe in this utility model;

[0021] Figure 6 This is a schematic diagram of the fitting structure between the nozzle and the sleeve in this utility model.

[0022] Legend:

[0023] 1. Fixed plate; 11. Processing tank; 12. Liquid inlet pipe; 13. Cover plate; 14. First filter screen; 15. Feed pump; 16. Distillation column; 2. Water tank; 21. Water pump; 22. Diverter pipe; 23. Water guide pipe; 24. Water outlet pipe; 25. Nozzle; 26. Drain pipe; 3. Support plate; 31. Screw; 32. Rotary wheel; 33. Pad plate; 4. Oil cylinder; 41. Top plate; 42. Protrusion; 43. Extension plate; 44. Slot; 5. Top frame; 51. Slide groove; 52. Screw hole; 53. Bottom frame; 6. Sleeve; 61. Second filter screen; 62. Baffle plate; 7. U-shaped groove; 71. Sealing ring; 72. Protrusion; 73. Retaining ring. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0025] Specific implementation examples are given below.

[0026] like Figures 1 to 6 As shown in the embodiment of this utility model, a tower-type high-purity NMP recovery device includes a fixed plate 1; a processing tank 11 is fixedly connected to the top of the fixed plate 1; an inlet pipe 12 is connected to the side wall of the processing tank 11; a cover plate 13 is provided on the top of the processing tank 11; two sets of connecting components are provided at the bottom of the cover plate 13; a first filter screen 14 is installed on the connecting components; a feed pump 15 is fixedly connected to the top of the fixed plate 1; a distillation column 16 is installed on one side of the fixed plate 1; the feed pump 15 is connected to both the processing tank 11 and the distillation column 16 through pipes; a fixing component is provided on the side wall of the processing tank 11; a cleaning component is provided on the fixed plate 1; a lifting component is provided on the fixed plate 1; and the processing tank 11... A sealing assembly is provided. During operation, the inlet pipe 12 is connected to the NMP liquid flow pipeline. When the NMP liquid enters the processing tank 11 from the inlet pipe 12, it passes through two sets of first filters 14. Then, the feed pump 15 is started to extract the liquid in the processing tank 11 and send it into the distillation column 16 for purification and recovery. When the NMP liquid passes through the two sets of first filters 14 with different mesh sizes, large and small suspended impurities in the NMP liquid are filtered. Through the above structure, the processing tank 11, the first filters 14, and the feed pump 15 can filter the NMP liquid before it enters the distillation column 16, thereby reducing the possibility of suspended impurities in the NMP liquid entering the distillation column 16 and causing blockage.

[0027] like Figures 2 to 6As shown, the cleaning assembly includes a water tank 2; the water tank 2 is fixed to the top of the fixing plate 1; a water pump 21 is fixed to the top of the fixing plate 1; the water pump 21 is connected to the water tank 2 via a pipe; a diversion pipe 22 is fixed to the output end of the water pump 21; a pair of water guide pipes 23 are fixed to the inner wall of the treatment tank 11; the diversion pipe 22 is connected to the water guide pipes 23; multiple water outlet pipes 24 are connected to the side wall of the water guide pipes 23; multiple nozzles 25 are installed on the water outlet pipes 24; a drain pipe 26 is connected to the side wall of the treatment tank 11; a control valve is provided on the drain pipe 26; a protective component is provided on the nozzle 25; during operation, cleaning water is pre-filled into the water tank 2, and when the entire equipment is in a stopped state, the water pump 21 is started to draw water from the water tank 2. The water is then fed into the diversion pipe 22, and from the diversion pipe 22 it is diverted into a pair of guide pipes 23, and then from the guide pipes 23 it is diverted into multiple outlet pipes 24, and then from the outlet pipes 24 it is diverted into multiple nozzles 25. When the water is sprayed out from the nozzles 25, it will backwash the first filter screen 14, thereby washing away the impurities remaining on the first filter screen 14, and opening the control valve of the drain pipe 26 to discharge the sewage from the drain pipe 26. After the backwashing is completed, the water pump 21 is stopped and the control valve of the drain pipe 26 is closed. With the above structure, the water tank 2, water pump 21, outlet pipe 24, nozzles 25 and drain pipe 26 are set up to facilitate the regular backwashing and cleaning of the first filter screen 14, so as to reduce the situation where a lot of impurities remain on the first filter screen 14 and cause blockage.

[0028] like Figure 2 and Figure 3 As shown, the fixing assembly includes a pair of support plates 3; the pair of support plates 3 are symmetrically hinged to the side wall of the processing box 11; a screw 31 is threaded onto the support plate 3; a rotating wheel 32 is fixedly connected to the top of the screw 31; a pad 33 is fixedly connected to the bottom of the screw 31; during operation, after the cover plate 13 is placed on top of the processing box 11, the support plate 3 is rotated to one side of the cover plate 13. When the pad 33 is above the cover plate 13, the rotating wheel 32 is rotated to drive the screw 31 and the pad 33 to move towards the top of the cover plate 13. When the pad 33 contacts the top of the cover plate 13... The compressible cover plate 13 is fixed to the processing box 11. When it is necessary to disassemble the cover plate 13, the screw 31 and the pad 33 can be raised by the reverse rotating wheel 32. Then, the support plate 3 is rotated away from the cover plate 13, so that the screw 31, the rotating wheel 32 and the pad 33 are moved away from the top of the cover plate 13, and the fixation of the cover plate 13 can be released. Through the above structure, the support plate 3, the screw 31, the rotating wheel 32 and the pad 33 are set to facilitate the fixation and disassembly of the cover plate 13 and the processing box 11, so as to facilitate the disassembly and maintenance of the cover plate 13 and the first filter screen 14 in the later stage.

[0029] like Figure 2 and Figure 4As shown, the lifting assembly includes a pair of hydraulic cylinders 4; the pair of hydraulic cylinders 4 are fixed to the top of the fixed plate 1; the hydraulic cylinders 4 are located at the corner of the processing box 11; a top plate 41 is fixed to the top of the hydraulic cylinders 4; a pair of protrusions 42 are fixed to the top of the top plate 41; a pair of extension plates 43 are fixed to the side wall of the cover plate 13; a pair of slots 44 are provided at the bottom of the extension plates 43; the top plate 41 and the extension plates 43 form an L-shaped structure; during operation, when maintenance of the first filter screen 14 is required, after the fixed assembly is removed from the cover plate 13, the hydraulic cylinders 4 are activated to stretch and drive the top plate 41 to rise. When the protrusions 42 are inserted into the slots 44, the extension plates 43 and the cover plate 13 are lifted. The first filter screen 14 rises, allowing it to be exposed from the processing box 11 for maintenance. After maintenance, the hydraulic cylinder 4 retracts, causing the cover plate 13, the first filter screen 14, and the extension plate 43 to descend. When the cover plate 13 is placed back on the processing box 11, the protrusion 42 disengages from the slot 44 as the hydraulic cylinder 4 retracts and resets the top plate 41. This structure, with the hydraulic cylinder 4, top plate 41, protrusion 42, extension plate 43, and slot 44, facilitates lifting the cover plate 13 and the first filter screen 14, exposing the first filter screen 14 from the processing box 11 for easier maintenance later.

[0030] like Figure 4 and Figure 5 As shown, the connecting assembly includes a pair of top frames 5; the pair of top frames 5 are fixed to the bottom of the cover plate 13; a sliding groove 51 is provided in the top frame 5; a pair of screw holes 52 are provided on the first filter screen 14; a pair of bottom frames 53 are fixed to the bottom of the inner side of the processing box 11; during operation, the first filter screen 14 is inserted into the sliding groove 51, and then a bolt is used to pass through the top frame 5 and the screw hole 52, and then a nut is used to fix the bolt, thus completing the installation of the first filter screen 14 on the cover plate 13. When the cover plate 13 is placed on the processing box 11, the bottom of the first filter screen 14 will be inserted into the screw hole 52, improving the stability of the first filter screen 14 in the processing box 11. Through the above structure, the top frame 5, the sliding groove 51, and the screw hole 52, together with the bolt and nut, can improve the convenience of installing the first filter screen 14 on the cover plate 13.

[0031] like Figure 6 As shown, the protective assembly includes a sleeve 6; the sleeve 6 is threadedly connected to the nozzle 25; a second filter screen 61 is installed inside the sleeve 6; a baffle plate 62 is fixedly connected to the side wall of the nozzle 25; during operation, the sleeve 6 and the nozzle 25 are connected together by a threaded connection. At this time, impurities in the NMP liquid will be filtered by the baffle plate 62. When the nozzle 25 sprays water to the outside, the impurities adhering to the baffle plate 62 can be washed away. Through the above structure, the sleeve 6, the second filter screen 61, and the baffle plate 62 can protect the nozzle 25, thereby reducing the adhesion of impurities in the NMP liquid to the nozzle 25 and causing it to become clogged.

[0032] like Figure 4 and Figure 5 As shown, the sealing assembly includes a U-shaped groove 7; the U-shaped groove 7 is formed on the top of the processing box 11; a sealing ring 71 is fixedly connected to the top of the inner wall of the processing box 11; the bottom of the cover plate 13 is provided with a protrusion 72 and a retaining ring 73; during operation, when the cover plate 13 is placed on the processing box 11, the protrusion 72 is inserted into the U-shaped groove 7, and at this time the retaining ring 73 contacts the inner side of the sealing ring 71. Through the above structure, with the U-shaped groove 7, sealing ring 71, protrusion 72 and retaining ring 73, the sealing performance at the connection between the processing box 11 and the cover plate 13 can be improved by the action of the U-shaped structure and the flexible material of the sealing ring 71.

[0033] Working principle: The inlet pipe 12 is connected to the NMP liquid flow pipeline. When the NMP liquid enters the treatment tank 11 from the inlet pipe 12, it passes through two sets of first filter screens 14. Then, the feed pump 15 is started to extract the liquid in the treatment tank 11 and send it to the distillation column 16 for purification and recovery. When the NMP liquid passes through the two sets of first filter screens 14 with different mesh sizes, large and small particulate suspended impurities in the NMP liquid are filtered out. Clean water is added to the water tank 2 beforehand. When the entire equipment is in a stopped state, the water pump 21 is started to extract water from the water tank 2 and send it into the diversion pipe 22. The water is then diverted from the diversion pipe 22 into a pair of guide pipes 23, and then from the guide pipes 23 into multiple outlet pipes 24. Finally, the water is diverted from the outlet pipes 24 into multiple... The nozzle 25 sprays water to backwash the first filter screen 14, removing impurities remaining on it. It also opens the control valve of the drain pipe 26 to discharge wastewater. After backwashing, the water pump 21 stops and the control valve of the drain pipe 26 closes. After placing the cover plate 13 on top of the treatment tank 11, the support plate 3 is rotated to one side of the cover plate 13. When the pad 33 is above the cover plate 13, the rotating wheel 32 drives the screw 31 and pad 33 to move towards the top of the cover plate 13. When the pad 33 contacts the top of the cover plate 13, it presses the cover plate 13, fixing it to the treatment tank 11. When the cover plate 13 needs to be removed, the rotating wheel 32 can be reversed to lift the screw 31 and pad 33. Then, rotate the support plate 3 away from the cover plate 13, so that the screw 31, the wheel 32, and the pad 33 move away from the top of the cover plate 13, thus releasing the fixation of the cover plate 13. When maintenance of the first filter screen 14 is required, after removing the fixing components from the cover plate 13, start the hydraulic cylinder 4 to stretch and drive the top plate 41 to rise. When the rear protrusion 42 is inserted into the slot 44, it drives the extension plate 43, the cover plate 13, and the first filter screen 14 to rise. At this time, the first filter screen 14 can be exposed from the processing box 11 for maintenance. After maintenance is completed, start the hydraulic cylinder 4 to retract, so that the cover plate 13, the first filter screen 14, and the extension plate 43 can fall. After the cover plate 13 is put back on the processing box 11, the top plate 41 will be reset when the hydraulic cylinder 4 retracts. This will cause the protrusion 42 to disengage from the slot 44, insert the first filter screen 14 into the slide groove 51, and then use a bolt to pass through the top frame 5 and the screw hole 52, and then use a nut to fix the bolt, thus completing the installation of the first filter screen 14 on the cover plate 13. When the cover plate 13 is placed on the treatment box 11, the bottom of the first filter screen 14 will be inserted into the screw hole 52, improving the stability of the first filter screen 14 in the treatment box 11. The sleeve 6 and the nozzle 25 are connected together by threaded engagement. At this time, the impurities in the NMP liquid will be filtered by the baffle 62. When the nozzle 25 sprays water to the outside, the impurities adhering to the baffle 62 can be washed away. When the cover plate 13 is placed on the treatment box 11, the protrusion 72 is inserted into the U-shaped groove 7, at which time the retaining ring 73 contacts the inner side of the sealing ring 71.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A tower-type high-purity NMP recovery device, comprising a fixed plate (1); characterized in that: The top of the fixed plate (1) is fixedly connected to a processing box (11); the side wall of the processing box (11) is connected to an inlet pipe (12); the top of the processing box (11) is provided with a cover plate (13); the bottom of the cover plate (13) is provided with two sets of connecting components; a first filter screen (14) is installed on the connecting components; the top of the fixed plate (1) is fixedly connected to a feed pump (15); a distillation column (16) is installed on one side of the fixed plate (1); the feed pump (15) is connected to the processing box (11) and the distillation column (16) through pipes; the side wall of the processing box (11) is provided with a fixing component; a cleaning component is provided on the fixed plate (1); a lifting component is provided on the fixed plate (1); and a sealing component is provided on the processing box (11).

2. The tower-type high-purity NMP recovery device according to claim 1, characterized in that: The cleaning assembly includes a water tank (2); the water tank (2) is fixed to the top of the fixing plate (1); a water pump (21) is fixed to the top of the fixing plate (1); the water pump (21) is connected to the water tank (2) through a pipe; a diversion pipe (22) is fixed to the output end of the water pump (21); a pair of water guide pipes (23) are fixed to the inner side wall of the treatment tank (11); the diversion pipe (22) is connected to the water guide pipes (23); multiple water outlet pipes (24) are connected to the side wall of the water guide pipes (23); multiple nozzles (25) are installed on the water outlet pipes (24); a drain pipe (26) is connected to the side wall of the treatment tank (11); a control valve is provided on the drain pipe (26); and a protective component is provided on the nozzle (25).

3. The tower-type high-purity NMP recovery device according to claim 1, characterized in that: The fixing assembly includes a pair of support plates (3); the pair of support plates (3) are symmetrically hinged to the side wall of the processing box (11); a screw (31) is threaded onto the support plate (3); a wheel (32) is fixed to the top of the screw (31); and a pad (33) is fixed to the bottom of the screw (31).

4. The tower-type high-purity NMP recovery device according to claim 1, characterized in that: The lifting assembly includes a pair of hydraulic cylinders (4); the pair of hydraulic cylinders (4) are fixed to the top of the fixed plate (1); the hydraulic cylinders (4) are located at the corner of the processing box (11); a top plate (41) is fixed to the top of the hydraulic cylinders (4); a pair of protrusions (42) are fixed to the top of the top plate (41); a pair of extension plates (43) are fixed to the side wall of the cover plate (13); a pair of slots (44) are opened at the bottom of the extension plates (43); the top plate (41) and the extension plates (43) form an L-shaped structure.

5. The tower-type high-purity NMP recovery device according to claim 1, characterized in that: The connecting assembly includes a pair of top frames (5); the pair of top frames (5) are fixed to the bottom of the cover plate (13); a sliding groove (51) is provided in the top frame (5); a pair of screw holes (52) are provided on the first filter screen (14); a pair of bottom frames (53) are fixed to the bottom of the inner side of the processing box (11).

6. The tower-type high-purity NMP recovery device according to claim 2, characterized in that: The protective assembly includes a sleeve (6); the sleeve (6) is threaded onto the nozzle (25); a second filter screen (61) is installed inside the sleeve (6); and a baffle plate (62) is fixed to the side wall of the nozzle (25).

7. The tower-type high-purity NMP recovery device according to claim 1, characterized in that: The sealing assembly includes a U-shaped groove (7); the U-shaped groove (7) is formed on the top of the processing box (11); a sealing ring (71) is fixedly connected to the top of the inner side wall of the processing box (11); and a protrusion (72) and a retaining ring (73) are provided at the bottom of the cover plate (13).

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