A purification device for reducing energy consumption of NMP rectification

Abstract

The utility model discloses a kind of purification devices for reducing NMP rectification energy consumption, the utility model relates to purification device technical field, including filter assembly, conveying assembly one, low boiling tower, conveying assembly two and rectifying column;The filter assembly includes box and flap valve, detachably connected with filter structure on the box, the bottom of the box is provided with through slot in one end, and flap valve is used to cover the bottom of through slot, the bottom of the box is communicated with drain pipe in other end, after filter structure is removed, open flap valve, push plate is moved to left side by electric telescopic link, impurity in the box is pushed to the place of through slot and discharged, then bolt is removed again, rotatable handle to vertical can, to facilitate push scraper by handle, so that the impurity remaining on the inner wall of box and push plate is pushed out through through slot, compared with prior art, the impurity in the box can be quickly cleaned, only the impurity adhered on the bottom of scraper can be cleaned by flushing, efficiently and conveniently.

Description

Technical Field

[0001] This utility model relates to the field of purification equipment technology, specifically a purification device for reducing NMP distillation energy consumption. Background Technology

[0002] NMP is a highly polar organic solvent with excellent dissolving power, and it is widely used in lithium battery manufacturing, electronic cleaning, pharmaceutical synthesis, polymer processing and other fields. The production of high-purity NMP and the recovery of industrial NMP waste liquid both require purification of NMP solution, which is currently generally carried out using distillation purification equipment.

[0003] Authorization announcement number CN219272292U discloses a high-efficiency NMP waste liquid distillation and purification device, which includes a purification tower and an inlet pipe connected to the lower side wall of the purification tower. A filter box and a pump are installed on the inlet pipe. The upper end of the filter box is open, and a cover plate is fixedly snapped onto the corresponding opening. Multiple filter screens are fixedly connected to the lower end of the cover plate. The prior art intercepts and filters solid impurities in the waste liquid, which can prevent clogging of the subsequent distillation tower packing, thereby avoiding the increase in energy consumption caused by packing blockage.

[0004] However, existing technology can only remove the filter screen for cleaning. There are many impurities inside the box, which are difficult to remove quickly by rinsing, making the cleaning work difficult. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a purification device that reduces the energy consumption of NMP distillation, thus solving the problems existing in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a purification device for reducing NMP distillation energy consumption, comprising a filtration assembly, a first conveying assembly, a low-boiling tower, a second conveying assembly, and a distillation tower; the filtration assembly includes a housing and a flap valve, the housing is detachably connected to a filtration structure, one bottom end of the housing has a through groove, and the flap valve is used to cover the bottom of the through groove, the other bottom end of the housing is connected to a drain pipe, and the drain pipe is connected to the low-boiling tower through the first conveying assembly, the low-boiling tower is connected to the distillation tower through the second conveying assembly, the housing is provided with an electric telescopic rod, the output end of the electric telescopic rod passes through the housing and is connected to a push plate that fits against the inner wall of the housing, and a scraper structure is detachably connected to the push plate.

[0007] Preferably, the scraper structure includes a scraper that fits against the top of the side wall of the push plate. The scraper has a groove, and a round rod is provided in the groove. A handle is sleeved on the outside of the round rod. The push plate has a protrusion, and the protrusion is fixedly connected to the handle by bolts. The top of the push plate has a first groove, and the top of the box has a second groove. The handle is in contact with both the first and second grooves.

[0008] Preferably, the filter structure includes a top plate detachably connected to the top of the housing. Filter plates, all in contact with the inner wall of the housing, are evenly arranged at the bottom of the top plate. The diameter of the filter holes on the filter plates gradually decreases from left to right. An inlet pipe is provided on the top plate, and a telescopic hose is connected to the top of the inlet pipe. The inlet pipe and the through-slot are both located to the left of the left filter plate. The through-slot is also located to the left of the inlet pipe. The drain pipe and the push plate are both located to the right of the right filter plate, and a scraper is located between the push plate and the right filter plate.

[0009] Preferably, the tops of the push plate, scraper, and handle are all in contact with the top plate.

[0010] Preferably, the housing is also equipped with a controller that electrically connects the electric telescopic rod and the flap valve.

[0011] Preferably, the housing is provided with an observation window.

[0012] This invention provides a purification apparatus for reducing the energy consumption of NMP distillation. Compared with the prior art, it has the following advantages: 1. This purification device for reducing NMP distillation energy consumption involves removing the filter structure, opening the flap valve, and using an electric telescopic rod to push the push plate to the left, discharging all impurities in the chamber through the channel. Then, the bolts are removed, and the handle is rotated to the vertical position, allowing the scraper to be pushed down to push out the impurities remaining on the inner wall of the chamber and the push plate through the channel. Compared with existing technologies, this device can quickly clean impurities from the chamber, and only the impurities adhering to the bottom of the scraper can be rinsed off, making it highly efficient and convenient.

[0013] 2. This purification device for reducing NMP distillation energy consumption is designed with a round rod, groove one, and groove two, allowing the handle to rotate. When not in use, the handle can be placed horizontally on the push plate and extended out of the housing for storage. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the filter assembly of this utility model; Figure 3 This utility model Figure 2 A cross-sectional schematic diagram; Figure 4 This is a schematic diagram of the push plate and scraper structure of this utility model in use; Figure 5 This is a schematic diagram of the scraper structure of this utility model.

[0015] In the diagram: 100, Filter assembly; 101, Housing; 102, Filter structure; 1021, Top plate; 1022, Inlet pipe; 1023, Telescopic hose; 1024, Filter plate; 103, Through groove; 104, Flip valve; 105, Drain pipe; 106, Push plate; 107, Electric telescopic rod; 108, Scraper structure; 1081, Scraper; 1082, Groove; 1083, Round rod; 1084, Handle; 1085, Protrusion; 1086, Bolt; 1087, Groove one; 1088, Groove two; 109, Observation window; 200, Conveying assembly one; 300, Low-boiling tower; 400, Conveying assembly two; 500, Distillation tower. Detailed Implementation

[0016] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] See Figures 1-5 This utility model provides the following two technical solutions: First embodiment: A purification device for reducing NMP distillation energy consumption, comprising a filter assembly 100, a conveying assembly 200, a low-boiling tower 300, a conveying assembly 400, and a distillation tower 500. The filter assembly 100 includes a housing 101 and a flap valve 104. A filter structure 102 is detachably connected to the housing 101. A through groove 103 is provided at one bottom end of the housing 101, and the flap valve 104 is used to cover the bottom of the through groove 103. A perfluororubber sealing gasket should be provided on the flap valve 104 to ensure the sealing effect. It can withstand long-term immersion in NMP and is resistant to high temperature and high pressure, with excellent sealing performance. The other bottom end of the housing 101 is connected to the drain pipe 105, and the drain pipe 105 is connected to the low-boiling tower 300 through the first conveying assembly 200. The low-boiling tower 300 is connected to the distillation tower 500 through the second conveying assembly 400. An electric telescopic rod 107 is provided on the housing 101. The output end of the electric telescopic rod 107 passes through the housing 101 and is connected to a push plate 106 that fits against the inner wall of the housing 101. A scraper structure 108 is detachably connected to the push plate 106.

[0018] The NMP solution enters the tank 101, is filtered by the filter structure 102, and then discharged through the drain pipe 105. It is then conveyed to the low-boiling tower 300 via the first conveying component 200, where it is heated to the required temperature. Water and low-boiling-point organic matter are vaporized and distilled off from the top of the tower. The NMP solution is then sent to the distillation tower 500 via the second conveying component 400, where it is heated to the required temperature. In the distillation tower 500, the vapor and liquid phases come into countercurrent contact. Through multiple vaporization and condensation processes, NMP and impurities are efficiently separated. High-purity NMP vapor is distilled off from the top of the tower and enters the condenser. After condensation, it flows into the recovery tank to obtain the finished product. Impurities such as high-boiling-point polymer metal salts remain in the bottom of the tower and are periodically discharged.

[0019] When the filter structure 102 is removed for cleaning, the flap valve 104 is opened, and the push plate 106 is moved to the left by the electric telescopic rod 107, pushing the impurities in the housing 101 to the channel 103 for discharge. Then, the scraper structure 108 is pushed down, so that the impurities remaining on the inner wall of the housing 101 and the push plate 106 continue to be pushed out through the channel 103. Compared with the existing technology, it can quickly clean the impurities in the housing 101. Only the impurities adhering to the bottom of the scraper structure 108 can be rinsed, which is efficient and convenient.

[0020] The scraper structure 108 includes a scraper 1081 that fits against the top of the side wall of the push plate 106. A groove 1082 is provided on the scraper 1081, and a round rod 1083 is provided in the groove 1082. A handle 1084 is sleeved on the outside of the round rod 1083. The handle 1084 can rotate relative to the round rod 1083. A protrusion 1085 is provided on the push plate 106, and the protrusion 1085 is fixedly connected to the handle 1084 by a bolt 1086, which can fix the handle 1084. Since the scraper 1081 fits against the push plate 106 and the inner wall of the housing 101, the scraper 1081 can be fixed. By removing the bolt 1086, the handle 1084 can be rotated to the vertical position, so that the scraper 1081 can be pushed down through the handle 1084.

[0021] The top of the push plate 106 has a groove 1087, and the top of the box 101 has a groove 1088. The handle 1084 is in contact with both groove 1087 and groove 1088, so that the handle 1084 can be rotated to a horizontal position for storage when not in use.

[0022] The filter structure 102 includes a top plate 1021 detachably connected to the top of the housing 101. Filter plates 1024, each conforming to the inner wall of the housing 101, are evenly distributed on the bottom of the top plate 1021. The pore size of the filter plates 1024 gradually decreases from left to right. Using multiple filter plates 1024 prevents rapid clogging of the fine filter plates 1024. An inlet pipe 1022 is provided on the top plate 1021, and an extension tube is connected to the top of the inlet pipe 1022. The retractable hose 1023 allows the top plate 1021 to be removed and moved upwards without being affected. The retractable hose 1023 is used for NMP solution entry. The inlet pipe 1022 and the through channel 103 are both located to the left of the left filter plate 1024. The through channel 103 is also located to the left of the inlet pipe 1022. The drain pipe 105 and the push plate 106 are both located to the right of the right filter plate 1024, and the scraper 1081 is located between the push plate 106 and the right filter plate 1024.

[0023] The tops of the push plate 106, scraper 1081 and handle 1084 are all in contact with the top plate 1021, ensuring that they act on the entire inner wall of the housing 101.

[0024] The housing 101 is also equipped with a controller that is electrically connected to the electric telescopic rod 107 and the flap valve 104 for easy control.

[0025] To facilitate monitoring of the filtration status inside the housing 101, a second implementation method is provided. The main difference between this method and the first implementation method is that an observation window 109 is provided on the housing 101 to observe the internal filtration status. When the NMP solution level reaches the observation window 109, it indicates that too many impurities have accumulated inside the housing 101 and it needs to be cleaned. Therefore, impurities on the inner wall of the housing 101 will not reach the top, which can be better removed by the push plate 106 and the scraper 1081.

[0026] Furthermore, all content not described in detail in this specification is existing technology known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited; conventional equipment can be used.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A purification apparatus for reducing NMP distillation energy consumption, characterized in that: It includes a filter assembly (100), a conveying assembly one (200), a low-boiling column (300), a conveying assembly two (400), and a distillation column (500). The filter assembly (100) includes a housing (101) and a flap valve (104). A filter structure (102) is detachably connected to the housing (101). A through groove (103) is provided at one bottom end of the housing (101), and the flap valve (104) is used to cover the bottom of the through groove (103). The other bottom end of the housing (101) is connected to a drain pipe (105), and the drain pipe (105) is connected to a conveying assembly. (200) is connected to a low-boiling tower (300), which is connected to a distillation tower (500) via a conveying assembly (400). An electric telescopic rod (107) is provided on the box (101). The output end of the electric telescopic rod (107) passes through the box (101) and is connected to a push plate (106) that fits against the inner wall of the box (101). A scraper structure (108) is detachably connected to the push plate (106).

2. The purification apparatus for reducing NMP distillation energy consumption according to claim 1, characterized in that: The scraper structure (108) includes a scraper (1081) that fits against the top of the side wall of the push plate (106). The scraper (1081) has a groove (1082) and a round rod (1083) is provided in the groove (1082). A handle (1084) is sleeved on the outside of the round rod (1083). The push plate (106) has a protrusion (1085) and the protrusion (1085) is fixedly connected to the handle (1084) by bolts (1086). The top of the push plate (106) has a first groove (1087) and the top of the box (101) has a second groove (1088). The handle (1084) is in contact with both the first groove (1087) and the second groove (1088).

3. The purification apparatus for reducing NMP distillation energy consumption according to claim 2, characterized in that: The filter structure (102) includes a top plate (1021) detachably connected to the top of the housing (101). The bottom of the top plate (1021) is uniformly provided with filter plates (1024) that are all in contact with the inner wall of the housing (101). The diameter of the filter holes of the filter plates (1024) gradually decreases from left to right. The top plate (1021) is provided with an inlet pipe (1022), and the top of the inlet pipe (1022) is connected with a telescopic hose (1023). The inlet pipe (1022) and the through groove (103) are both located on the left side of the left filter plate (1024). The through groove (103) is also located on the left side of the inlet pipe (1022). The drain pipe (105) and the push plate (106) are both located on the right side of the right filter plate (1024). The scraper (1081) is located between the push plate (106) and the right filter plate (1024).

4. The purification apparatus for reducing NMP distillation energy consumption according to claim 3, characterized in that: The tops of the push plate (106), scraper (1081) and handle (1084) are all in contact with the top plate (1021).

5. A purification apparatus for reducing NMP distillation energy consumption according to claim 1, characterized in that: The housing (101) is also equipped with a controller that electrically connects the electric telescopic rod (107) and the flap valve (104).

6. The purification apparatus for reducing NMP distillation energy consumption according to claim 1, characterized in that: An observation window (109) is provided on the housing (101).

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