Recovery equipment for polyimide monomer production

Abstract

The utility model discloses recovery equipment for polyimide monomer production, which comprises an outer box, a first-stage separation box and a second-stage separation box are arranged in the outer box, and the first-stage separation box and the second-stage separation box are vertically and reversely distributed; the first-stage separation box comprises a screening plate, a material blocking plate and a liquid collecting box, the screening plate is obliquely arranged, the material blocking plate is located on the edge side of the upper end of the screening plate, an opening is formed in one side of the material blocking plate and corresponds to the second-stage separation box in position, and the liquid collecting box is located at the lower end of the screening plate; the first-stage separation box and the second-stage separation box are the same in shape and structure. Solid and liquid enter the outer box through the upper feeding port and are separated twice through the first-stage separation box and the second-stage separation box, so that the solid and the liquid can be completely separated, then the liquid is discharged from the liquid discharging pipe, the solid is discharged from the material receiving pipe, solid-liquid separation can be continuously carried out during separation work, and the separation efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of polyimide monomer production, in particular to a recycling device for polyimide monomer production. Background Art

[0002] Polyimide is a high-performance polymer widely used in aerospace, electronics, military, and other fields due to its excellent thermal stability, mechanical properties, chemical stability, and electrical insulation properties. The synthesis of polyimide typically requires the use of specific monomers, which form the repeating units of polyimide during the polymerization process.

[0003] In the production process of polyimide monomer, by-products and solid-liquid mixtures of unfinished polymerization reactions are generated. Recycling these can help reduce raw material consumption, lower production costs, and alleviate environmental burdens. When performing solid-liquid separation, the traditional method is to pour the solid-liquid mixture into a tank and separate it through a filter. This method is intermittent screening and requires workers to screen one tank at a time. It requires frequent operations and has low separation efficiency. Utility Model Content

[0004] The purpose of the utility model is to provide a recovery device for polyimide monomer production to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: A polyimide monomer production recovery device, comprising an outer box, wherein a primary separation box and a secondary separation box are provided inside the outer box, wherein the primary separation box and the secondary separation box are arranged up and down and in opposite directions;

[0006] The primary separation box includes a screening plate, a baffle plate and a liquid collecting box. The screening plate is evenly distributed with a number of filter holes, and the screening plate is tilted. The baffle plate is located on the upper side of the screening plate, and an opening is provided on one side of the baffle plate. The position of the opening corresponds to that of the secondary separation box. The liquid collecting box is located at the lower end of the screening plate.

[0007] The first-stage separation box and the second-stage separation box have the same shape and structure;

[0008] Vibrating motors are provided on the sides of the primary separation box and the secondary separation box.

[0009] Preferably, a feed port is provided at the upper end of the outer box, and a material introduction port is provided at the lower end of the feed port. The material introduction port is located inside the outer box and inside the baffle plate.

[0010] Preferably, a receiving port is provided at the bottom inner side of the outer box, and the receiving port is located at the output end of the secondary separation box. A receiving pipe is provided at the lower end of the receiving port, and the receiving pipe is located at the bottom outer side of the outer box.

[0011] Preferably, a connecting plate is provided below the outer box, the first-stage separation box and the second-stage separation box are fixedly connected to the connecting plate via a plurality of support columns, and a shock-absorbing assembly is provided at the lower end of the connecting plate.

[0012] Preferably, a fan is provided at the bottom of the first-stage separation box, and the air outlet of the fan faces the screen plate of the second-stage separation box.

[0013] Preferably, both sides and the bottom of the liquid collecting box are inclined, and a drain pipe is provided at the bottom of the other side of the liquid collecting box.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] The utility model enters the outer box through the upper feed port, and is separated twice by the primary separation box and the secondary separation box, so that the solid and the liquid can be completely separated. Then the liquid is discharged from the discharge pipe and the solid is discharged from the receiving pipe. The solid-liquid separation can be continuously performed during the separation work, thereby improving the separation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a cross-sectional view of the utility model;

[0018] Figure 3 This is a schematic structural diagram of the primary separation box and the secondary separation box of the utility model.

[0019] In the figure: 1. Outer box; 11. Feed inlet; 12. Feed inlet; 13. Feed receiving port; 14. Feed receiving pipe; 2. Primary separation box; 21. Screening plate; 22. Baffle plate; 23. Liquid collecting box; 24. Drain pipe; 3. Secondary separation box; 4. Vibration motor; 5. Connecting plate; 51. Support column; 52. Shock-absorbing assembly; 6. Fan. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] See also Figure 1-3The utility model provides a technical solution: a polyimide monomer production recovery device, comprising an outer box 1, wherein a primary separation box 2 and a secondary separation box 3 are arranged inside the outer box 1, and the primary separation box 2 and the secondary separation box 3 are arranged up and down and in opposite directions;

[0022] A feed port 11 is provided at the upper end of the outer box 1 , and a material introduction port 12 is provided at the lower end of the feed port 11 . The material introduction port 12 is located inside the outer box 1 and inside the material baffle 22 .

[0023] A receiving port 13 is provided at the inner bottom of the outer box 1 , and the receiving port 13 is located at the output end of the secondary separation box 3 . A receiving pipe 14 is provided at the lower end of the receiving port 13 , and the receiving pipe 14 is located at the outer bottom of the outer box 1 .

[0024] Among them, polyimide monomers will produce by-products and solid-liquid mixtures of uncompleted polymerization reactions during the production process, which need to be separated into solid and liquid during recycling. Since the solid-liquid mixture has a pungent odor and is corrosive, it will cause damage to human skin. Therefore, it is necessary to set up an outer box 1 so that the solid-liquid separation can be completed inside the outer box 1 to prevent contact with human skin.

[0025] First, the solid-liquid mixture enters the outer box 1 from the feed port 11 at the upper end of the outer box 1 , and is separated twice by the primary separation box 2 and the secondary separation box 3 so that the solid can be discharged from the receiving pipe 14 at the bottom of the outer box 1 .

[0026] The primary separation box 2 includes a screening plate 21, a baffle plate 22 and a liquid collecting box 23. The screening plate 21 is evenly distributed with a number of filter holes, and the screening plate 21 is inclined. The baffle plate 22 is located on the upper side of the screening plate 21, and an opening is provided on one side of the baffle plate 22. The position of the opening corresponds to the secondary separation box 3. The liquid collecting box 23 is located at the lower end of the screening plate 21. Both sides and the bottom of the liquid collecting box 23 are inclined. A drain pipe 24 is provided at the bottom of the other side of the liquid collecting box 23.

[0027] Vibrating motors 4 are provided on the sides of the primary separation box 2 and the secondary separation box 3 .

[0028] Among them, the first-stage separation box 2 and the second-stage separation box 3 have the same shape and structure. After the solid-liquid mixture enters from the feed port 11, it falls onto the screen plate 21 of the first-stage separation box 2 through the feed port 12. Since the screen plate 21 is an inclined structure, the solid rolls from the high point to the low point of the screen plate 21. The vibration motor 4 on the side of the first-stage separation box 2 vibrates the screen plate 21, which can speed up the screening of solids and liquids and prevent the phenomenon of solid material jamming. The solid falls from the opening of the baffle plate 22 into the upper end of the second-stage separation box 3, and the liquid flows into the collecting tank through the filter holes of the screen plate 21. In 23, the inclined plates on both sides and the bottom guide the liquid so that it gathers at the position of the drain pipe 24 and is discharged from the collecting box 23 through the drain pipe 24. The liquid has been basically separated by the first-level separation box 2, and the residual liquid on the solid is further separated by setting the second-level separation box 3. In addition, a fan 6 is set at the bottom of the first-level separation box 2, and the air outlet of the fan 6 is directed to the screen plate 21 of the second-level separation box 3, so that the separated solids are further dried by the fan 6. Finally, the solids fall into the receiving port 13 from the output end of the second-level separation box 3 and are discharged from the outer box 1 through the receiving pipe 14.

[0029] A connecting plate 5 is provided below the outer box 1 , and the first-stage separation box 2 and the second-stage separation box 3 are fixedly connected to the connecting plate 5 via a plurality of support columns 51 , respectively. A shock absorbing assembly 52 is provided at the lower end of the connecting plate 5 .

[0030] Among them, since vibration motors 4 are installed on the sides of the first-level separation box 2 and the second-level separation box 3, a vibration reduction component 52 is required to reduce vibration therefrom. The connecting plate 5 is used to connect the first-level separation box 2 and the second-level separation box 3 into one, which can facilitate vibration reduction therefrom.

[0031] The working principle and use process of this utility model:

[0032] First, the solid-liquid mixture enters the outer box 1 from the feed port 11 at the upper end of the outer box 1, and falls onto the screen plate 21 of the primary separation box 2 through the feed port 12. Since the screen plate 21 is an inclined structure, the solid rolls from the high point of the screen plate 21 to the low point. The vibration motor 4 on the side of the primary separation box 2 vibrates the screen plate 21, which can accelerate the screening of solids and liquids and prevent the phenomenon of solid material jamming, so that the solid falls from the opening of the baffle plate 22 into the upper end of the secondary separation box 3, and the liquid flows into the collecting box 23 through the filter holes of the screen plate 21. The liquid is guided by the inclined plates on both sides and the bottom, so that the liquid is collected at the position of the drain pipe 24 and discharged from the collecting box 23 through the drain pipe 24. The liquid has basically been separated by the primary separation box 2, and the residual liquid on the solid is further separated by setting the secondary separation box 3. Finally, the solid falls from the output end of the secondary separation box 3 into the receiving port 13 and is discharged from the outer box 1 through the receiving pipe 14.

[0033] Although the 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 variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A polyimide monomer production recovery device, comprising an outer box (1), characterized in that: A primary separation box (2) and a secondary separation box (3) are provided inside the outer box (1), and the primary separation box (2) and the secondary separation box (3) are arranged up and down and in opposite directions; The primary separation box (2) comprises a screening plate (21), a baffle plate (22) and a liquid collecting box (23); a plurality of filter holes are evenly distributed on the screening plate (21), and the screening plate (21) is arranged tilted; the baffle plate (22) is located on the upper side of the screening plate (21), and an opening is provided on one side of the baffle plate (22); the position of the opening corresponds to that of the secondary separation box (3); and the liquid collecting box (23) is located at the lower end of the screening plate (21); The first-stage separation box (2) and the second-stage separation box (3) have the same shape and structure; Vibrating motors (4) are provided on the sides of the primary separation box (2) and the secondary separation box (3).

2. The polyimide monomer production recovery equipment according to claim 1, characterized in that: The upper end of the outer box (1) is provided with a feed port (11), the lower end of the feed port (11) is provided with a feed outlet (12), and the feed outlet (12) is located inside the outer box (1) and inside the baffle plate (22).

3. The polyimide monomer production recovery equipment according to claim 1, characterized in that: The inner bottom of the outer box (1) is provided with a receiving port (13), the receiving port (13) is located at the output end of the secondary separation box (3), and the lower end of the receiving port (13) is provided with a receiving pipe (14), the receiving pipe (14) is located at the outer bottom of the outer box (1).

4. The polyimide monomer production recovery equipment according to claim 1, characterized in that: A connecting plate (5) is provided below the outer box (1); the first-stage separation box (2) and the second-stage separation box (3) are fixedly connected to the connecting plate (5) via a plurality of support columns (51); and a shock-absorbing assembly (52) is provided at the lower end of the connecting plate (5).

5. The polyimide monomer production recovery equipment according to claim 1, characterized in that: A fan (6) is provided at the bottom of the first-stage separation box (2), and an air outlet of the fan (6) faces the screening plate (21) of the second-stage separation box (3).

6. The polyimide monomer production recovery equipment according to claim 1, characterized in that: Both sides and the bottom of the liquid collecting box (23) are arranged at an angle, and a drain pipe (24) is provided at the bottom of the other side of the liquid collecting box (23).

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