Small-sized NMP recovery liquid rectification and purification device

Abstract

The utility model relates to the technical field of NMP (N-Methyl Pyrrolidone) purification, in particular to a small NMP recovery liquid rectification and purification device which comprises a distillation cylinder, a cover body, a feeding pipe, a discharging pipe, a mounting pipe, a mounting rod and a bracket, the cover body is connected with the upper end of the distillation cylinder, a steam outlet pipe is arranged on the cover body, the feeding pipe is connected with the distillation cylinder, the discharging pipe is connected with the distillation cylinder, and a heating assembly is arranged on the distillation cylinder; the mounting pipe is rotationally connected with the discharging pipe, the discharging pipe is provided with a driving assembly, the driving assembly is in transmission connection with the mounting pipe, and the mounting rod is connected with the mounting pipe and provided with a scraping strip. According to the utility model, the driving assembly is started to drive the mounting pipe and the mounting rod to rotate in the distillation cylinder, and the scraping strip on the mounting rod is pressed on the inner wall of the distillation cylinder, so that the inner wall of the distillation cylinder can be cleaned immediately, and the cleaning is more thorough and rapid; the plurality of stirring rods at the other end of the mounting rod uniformly stir the internal liquid, so that the internal liquid is heated more quickly, and the distillation efficiency is further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to NMP purification technical field, concretely is a small -size NMP recovery liquid rectification purification device. BACKGROUND

[0002] NMP will be polluted and worn in the use process, in order to reduce cost and environmental influence, through recovery and rectification purification device, used NMP can be recycled and purified, thereby obtaining high purity NMP solvent, realizes the effective utilization of resources. The existing distillation device after distillation, distillation residue, dirt will adhere to the inner wall of the device, leading to the heat transfer efficiency of the hot plate reduction, influence distillation efficiency.

[0003] The Chinese patent with the authorization announcement number CN118811921B discloses a kind of high-efficiency NMP waste liquid rectification purification device, including distillation column, heating plate assembly, scraper assembly and distillation cover assembly are arranged in the inner cavity of distillation column, scraper assembly and heating plate assembly bottom are abutted, distillation cover assembly is covered in heating plate assembly top, driving element is installed at the top of distillation column, the distillation device of the present application can drive distillation cover assembly and scraper assembly to slide away from heating plate assembly respectively by driving element first after distillation, then drive heating plate assembly to overturn 180 degrees, so that the distillation surface of heating plate assembly is overturned to below, finally rectifier cover assembly and scraper assembly are driven to return to original position by driving element, so that the distillation surface located above and between distillation cover assembly can continue to carry out distillation operation at this time, and the distillation surface that overturns to below is cleaned by scraper assembly, avoids distillation residue adhering on the surface of heating plate assembly to influence distillation efficiency.

[0004] But the above technical scheme has the following defects: the scraper in the above high-efficiency NMP waste liquid rectification purification device only cleans the bottom heating plate, cannot clean the inner wall of distillation cover, so that the residue in the distillation cover cannot be cleaned. UTILITY MODEL CONTENTS

[0005] The utility model aims at the problems in the background art, and proposes a kind of small -size NMP recovery liquid rectification purification device.

[0006] The technical scheme of the utility model: a kind of small -size NMP recovery liquid rectification purification device, including distillation cylinder, cover, feed pipe, discharge pipe, installation pipe, mounting rod and support;

[0007] Distillation cylinder connects support, cover connects the upper end of distillation cylinder, cover is equipped with steam pipe, feed pipe connects distillation cylinder, discharge pipe connects the lower end of distillation cylinder, and heating assembly is equipped on distillation cylinder;

[0008] The inner wall of the discharge pipe is rotationally connected with the mounting pipe, the mounting pipe is provided with an electromagnetic valve, the discharge pipe is provided with a driving assembly, the driving assembly is transmissionally connected with the mounting pipe, the mounting rod is provided with a plurality of mounting pipes, and the end of the mounting rod close to the inner wall of the distillation cylinder is provided with a scraping strip which is pressed against the inner wall of the distillation cylinder.

[0009] Preferably, the lower end of the distillation cylinder is provided with a lower hopper, and the inner diameter of the lower hopper gradually decreases along the axis of the distillation cylinder.

[0010] The lower end of the discharge pipe is connected with the lower hopper, and the shape of the mounting rod corresponds to the shape of the lower hopper and the inner wall of the distillation cylinder.

[0011] Preferably, the end of the mounting rod away from the inner wall of the distillation cylinder is provided with a plurality of stirring rods.

[0012] Preferably, the upper end of the mounting rod is provided with a mounting ring, the mounting ring is connected with the upper ends of the plurality of mounting rods, the mounting ring is coaxially distributed with the distillation cylinder, and the outer peripheral surface of the mounting ring is slidingly connected with the inner wall of the distillation cylinder.

[0013] Preferably, the driving assembly comprises a driven gear, a driving gear and a driving motor.

[0014] The driven gear is connected with the outer peripheral surface of the mounting pipe, the driving motor is connected with the discharge pipe, the driving gear is connected with the transmission shaft of the driving motor, and the driving gear is meshingly connected with the driven gear.

[0015] Preferably, the heating assembly comprises a heat preservation cover and a heating pipe.

[0016] The heating pipe is connected with the outer surface of the distillation cylinder, the heat preservation cover is connected with the outer wall of the distillation cylinder, and the heat preservation cover is sleeved on the outer side of the heating pipe.

[0017] Preferably, the heating pipe is wound on the outer peripheral surface of the distillation cylinder.

[0018] Compared with the prior art, the above technical scheme of the utility model has the following beneficial technical effects:

[0019] 1. In the utility model, the driving assembly drives the mounting pipe and the mounting rod to rotate in the distillation cylinder, the scraping strip on the mounting rod is pressed against the inner wall of the distillation cylinder, the inner wall of the distillation cylinder can be cleaned in time, and the cleaning is more thorough and faster.

[0020] 2. In the utility model, the plurality of stirring rods at the other end of the mounting rod uniformly stir the internal liquid, the internal liquid is heated faster, and the distillation efficiency is further improved.

[0021] 3. In the utility model, the heating pipe is uniformly wound on the outer side of the distillation cylinder, the heating pipe heats the distillation cylinder more uniformly, and the heat preservation cover plays a heat preservation and protection role. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1The utility model provides a kind of small NMP recovery liquid rectification purification device's sectional view is proposed for the utility model.

[0023] Figure 2 The internal structure schematic diagram of distillation cylinder in an embodiment is proposed for the utility model.

[0024] Figure 3 The utility model provides a kind of small NMP recovery liquid rectification purification device's sectional view is proposed for the utility model.

[0025] Figure 4 For Figure 3 The structure schematic diagram in A place.

[0026] Reference signs: 1, distillation cylinder;2, heat preservation cover;3, cover;4, steam pipe;5, feed pipe;6, discharge pipe;7, driven gear;8, driving gear;9, driving motor;10, mounting pipe;11, heating pipe;12, mounting rod;13, stirring rod;14, mounting ring;15, scraping strip;16, lower hopper;17, support. Specific implementation

[0027] Example one

[0028] As Figures 1-4 The utility model discloses a kind of small NMP recovery liquid rectification purification device, including distillation cylinder 1, cover 3, feed pipe 5, discharge pipe 6, mounting pipe 10, mounting rod 12 and support 17;

[0029] Distillation cylinder 1 connects support 17, cover 3 connects the upper end of distillation cylinder 1, cover 3 is equipped with steam pipe 4, feed pipe 5 connects distillation cylinder 1, discharge pipe 6 connects the lower end of distillation cylinder 1, and distillation cylinder 1 is equipped with heating component;

[0030] Mounting pipe 10 is rotatably connected to the inner wall of discharge pipe 6, and an electromagnetic valve is arranged in mounting pipe 10, discharge pipe 6 is equipped with driving assembly, driving assembly is transmissionally connected to mounting pipe 10, mounting rod 12 is equipped with a plurality of and is connected to mounting pipe 10, one end of mounting rod 12 close to the inner wall of distillation cylinder 1 is equipped with scraping strip 15, and scraping strip 15 is pressed in the inner wall of distillation cylinder 1.

[0031] Further, a plurality of stirring rods 13 are arranged at the end of mounting rod 12 away from the inner wall of distillation cylinder 1, mounting ring 14 is arranged at the upper end of mounting rod 12, mounting ring 14 is connected to the upper end of a plurality of mounting rods 12, mounting ring 14 is coaxially distributed with distillation cylinder 1, and the outer circumferential surface of mounting ring 14 is slidably connected to the inner wall of distillation cylinder 1.

[0032] Further, lower hopper 16 is arranged at the lower end of distillation cylinder 1, and the inner diameter of lower hopper 16 gradually decreases along the axis direction of distillation cylinder 1 downwards.

[0033] The discharge pipe 6 is connected to the lower end of the lower hopper 16, and the shape of the mounting rod 12 corresponds to the shape of the lower hopper 16 and the inner wall of the distillation cylinder 1.

[0034] In the utility model, the liquid after pretreatment is input into the distillation cylinder 1 from the feed pipe 5, the heating assembly heats the distillation cylinder 1, the steam is discharged from the steam outlet pipe 4 on the cover body 3, the driving assembly below the distillation cylinder 1 drives the mounting pipe 10 to rotate, the mounting pipe 10 drives the plurality of mounting rods 12 to rotate in the distillation cylinder 1, the scraping strip 15 at one end of the mounting rod 12 is pressed against the inner wall of the distillation cylinder 1, the inner wall of the distillation cylinder 1 can be cleaned in time, the plurality of stirring rods 13 at the other end of the mounting rod 12 uniformly stir the internal liquid, the internal liquid is heated faster, and the distillation efficiency is further improved.

[0035] Example two

[0036] As shown in Figures 3-4 the utility model discloses a kind of small NMP recovery liquid rectification purification device, compared with example one, driving assembly in the embodiment includes driven gear 7, driving gear 8 and drive motor 9;

[0037] Driven gear 7 is connected to the outer circumferential surface of mounting pipe 10, drive motor 9 is connected to discharge pipe 6, driving gear 8 is connected to the transmission shaft of drive motor 9, and driving gear 8 is engagedly connected with driven gear 7.

[0038] In the embodiment, drive motor 9 drives driving gear 8 to rotate, driving gear 8 drives mounting pipe 10 to rotate by engaging transmission, and mounting pipe 10 drives the plurality of mounting rods 12 thereon to rotate.

[0039] Example three

[0040] As shown in Figures 2-3 the utility model discloses a kind of small NMP recovery liquid rectification purification device, compared with example one, heating assembly in the embodiment includes heat preservation cover 2 and heating pipe 11;

[0041] Heating pipe 11 is connected to the outer surface of distillation cylinder 1, heat preservation cover 2 is connected to the outer wall of distillation cylinder 1, and heat preservation cover 2 is sleeved outside heating pipe 11.

[0042] Further, heating pipe 11 is wound on the outer circumferential surface of distillation cylinder 1.

[0043] In the embodiment, heating pipe 11 is uniformly wound on the outer side of distillation cylinder 1, so that heating pipe 11 heats distillation cylinder 1 more uniformly, and heat preservation cover 2 plays a role of heat preservation and protection.

[0044] The embodiment of the utility model is described in detail above in combination with the drawings, but the utility model is not limited to this, and various changes can be made within the knowledge range possessed by the person skilled in the art without departing from the purpose of the utility model.

Claims

1. A small-sized NMP recovery liquid rectification purification device, characterized by comprising: The distillation cylinder (1), the cover (3), the feeding pipe (5), the discharging pipe (6), the mounting pipe (10), the mounting rod (12) and the support (17) are included. The distillation cylinder (1) is connected with the support (17), the cover (3) is connected with the upper end of the distillation cylinder (1), the cover (3) is provided with the steam pipe (4), the feeding pipe (5) is connected with the distillation cylinder (1), the discharging pipe (6) is connected with the lower end of the distillation cylinder (1), and the distillation cylinder (1) is provided with a heating assembly. The mounting pipe (10) is rotatably connected with the inner wall of the discharging pipe (6), the mounting pipe (10) is provided with an electromagnetic valve, the discharging pipe (6) is provided with a driving assembly, the driving assembly is transmissionally connected with the mounting pipe (10), the mounting rod (12) is provided with a plurality of mounting pipes (10), and the end of the mounting rod (12) close to the inner wall of the distillation cylinder (1) is provided with a scraping strip (15).

2. The small-sized NMP recovery liquid rectification purification device according to claim 1, characterized in that, The lower end of the distillation cylinder (1) is provided with a lower hopper (16), and the inner diameter value of the lower hopper (16) gradually decreases along the axis direction of the distillation cylinder (1); The discharging pipe (6) is connected with the lower end of the lower hopper (16), and the shape of the mounting rod (12) corresponds to the shape of the inner wall of the lower hopper (16) and the distillation cylinder (1).

3. The small-sized NMP recovery liquid rectification purification device according to claim 1, characterized in that, The end of the mounting rod (12) away from the inner wall of the distillation cylinder (1) is provided with a plurality of stirring rods (13).

4. The small-sized NMP recovery liquid rectification purification device according to claim 1, characterized in that, The upper end of the mounting rod (12) is provided with a mounting ring (14), the mounting ring (14) is connected with the upper ends of the plurality of mounting rods (12), the mounting ring (14) is coaxially arranged with the distillation cylinder (1), and the outer circumferential surface of the mounting ring (14) is slidably connected with the inner wall of the distillation cylinder (1).

5. The compact NMP recovery liquid rectification purification device according to claim 1, characterized in that, The driving assembly comprises a driven gear (7), a driving gear (8) and a driving motor (9); The driven gear (7) is connected with the outer circumferential surface of the mounting pipe (10), the driving motor (9) is connected with the discharging pipe (6), the driving gear (8) is connected with the transmission shaft of the driving motor (9), and the driving gear (8) is meshingly connected with the driven gear (7).

6. The compact NMP recovery liquid rectification purification device according to claim 1, characterized in that, The heating assembly comprises a heat preservation cover (2) and a heating pipe (11); The heating pipe (11) is connected with the outer surface of the distillation cylinder (1), the heat preservation cover (2) is connected with the outer wall of the distillation cylinder (1), and the heat preservation cover (2) is sleeved outside the heating pipe (11).

7. A compact NMP recovery liquid rectification purification device according to claim 6, characterized by The heating pipe (11) is wound on the outer circumferential surface of the distillation cylinder (1).

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