Methanol solvent recovery device for processing of pigment intermediates

Abstract

This utility model relates to the field of chemical production technology, specifically to a methanol solvent recovery device for pigment intermediate processing, comprising a tower body, a base, a condenser, and a reboiler. The tower body has a slidingly connected tray, and annular scrapers are fixed on both the upper and lower surfaces of the tray. Each annular scraper is fitted against the inner wall of the tower body. At least two drainage troughs are provided on the inner wall of the tower body near the base, and each annular scraper has a drainage port corresponding to one of the drainage troughs. A lifting assembly is installed inside the tower body, and the lifting assembly is kinetically connected to the tray. A cleaning assembly is installed inside the base, and the cleaning assembly is kinetically connected to the lifting assembly, enabling the cleaning assembly to clean the inner wall of the base. This utility model achieves efficient and rapid cleaning of impurities adhering to the inner wall of the tower body, thereby improving the quality of methanol recovery.

Description

Technical Field

[0001] This utility model relates to the field of chemical production technology, and in particular to a methanol solvent recovery device for pigment intermediate processing. Background Technology

[0002] DATA is an important intermediate in the production of quinacridone pigments, which are mainly used for coloring plastics, coatings, resins, inks, etc., and can also be used for coloring fiber pulp.

[0003] In the DATA hydrogen peroxide oxidation process, methanol is generally used as the solvent and dispersant. The first step is a condensation reaction, which produces methanol. After the reaction is completed, the solvent is recovered and methanol can be separated by distillation in a distillation column. However, in actual use, some organic solvents will flow down the inner wall of the distillation column. Since some organic solvents have a high content of solid impurities, these solid impurities often stick to the inner wall of the column and cannot be cleaned by spraying alone, making cleaning very inconvenient. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a methanol solvent recovery device for pigment intermediate processing, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides a methanol solvent recovery device for pigment intermediate processing, comprising a tower body, a base, a condenser, and a reboiler. The base is connected to the bottom of the tower body. The gas phase pipe of the condenser is connected to the top of the tower body, and the liquid phase pipe of the condenser is connected to the reflux pipe of the tower body. The liquid inlet pipe of the reboiler is connected to the liquid outlet pipe of the base, and the steam pipe of the reboiler is connected to the side wall of the base. A tower plate is slidably connected inside the tower body. Annular scrapers are fixed on both the upper and lower surfaces of the tower plate, and each annular scraper is fitted against the inner wall of the tower body. At least two sludge discharge grooves are provided on the inner wall of the tower body near the base. Each annular scraper has a sludge discharge port corresponding to one of the sludge discharge grooves. A lifting assembly is installed inside the tower body and is drivenly connected to the tower plate. A cleaning assembly is installed inside the base and is drivenly connected to the lifting assembly, so that the cleaning assembly can clean the inner wall of the base.

[0006] Preferably, the lifting assembly includes:

[0007] A reciprocating screw is disposed inside the tower body. One end of the reciprocating screw passes through the top of the tower body and is rotatably connected, while the other end is connected to the cleaning assembly. The tower plate is sleeved on the reciprocating screw and connected by ball bearings.

[0008] The motor is fixedly mounted on the top of the tower body, and the output shaft of the motor is fixedly connected to one end of the reciprocating lead screw.

[0009] Preferably, the cleaning components include:

[0010] The connecting rod has one end fixedly connected to the end of the reciprocating lead screw away from the motor, and the other end rotatably connected to the inner bottom of the base;

[0011] At least one connecting plate, one end of which is fixedly connected to the connecting rod, and the other end of which is fixedly provided with an elastic element. The end of the elastic element away from the connecting plate is provided with a strip scraper, which is fitted against the inner wall of the base.

[0012] Preferably, the elastic element includes:

[0013] A fixing plate is fixedly connected to the connecting plate on one side, and multiple guide rods are passed through the other side. One end of each guide rod is fixedly connected to the strip scraper.

[0014] Multiple springs are respectively sleeved on the guide rod, with each spring's two ends abutting against the strip scraper and the fixing plate, respectively.

[0015] Preferably, a cleaning blade is provided on the side of the connecting plate, and the cleaning blade is fitted into the inner bottom of the base.

[0016] Preferably, the inner wall of the tower body is provided with at least one limiting groove, and the outer wall of the tower plate is fixed with at least one limiting block, and the limiting block is adapted to be disposed in the limiting groove so that the tower plate slides up and down in the tower body.

[0017] The beneficial effects of this invention are as follows: When the tower body needs cleaning, the lifting assembly moves the tower plate up and down, which in turn moves the two annular scrapers up and down, thereby scraping away impurities adhering to the inner wall of the tower onto the tower plate and into the base. The lifting assembly also drives the cleaning assembly to clean the inner wall of the base. After cleaning, water is injected into the tower body to rinse the tower plate. At this time, the tower plate is located at the drain trough, and the drain outlet is connected to the drain trough. The water flow will carry the impurities on the tower plate through the drain outlet into the drain trough and into the base, and finally out through the drain pipe on the base, thus completing the impurity removal work of the tower body and the base. After the impurity removal is completed, the lifting assembly moves the tower plate upward until the drain outlet is no longer connected to the drain trough, allowing the tower body and the base to work in conjunction with the condenser and reboiler to resume the distillation separation state. This invention achieves efficient and rapid cleaning of impurities adhering to the inner wall of the tower, thereby improving the quality of methanol recovery. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0020] Figure 2 This is a half-sectional structural diagram of the tower body and base according to an embodiment of the present utility model;

[0021] Figure 3 This is an embodiment of the present utility model. Figure 2 Enlarged structural diagram at point A;

[0022] Figure 4 This is an embodiment of the present utility model. Figure 2 Enlarged structural diagram at point B;

[0023] Figure 5 This is an embodiment of the present utility model. Figure 2 Enlarged structural diagram at point C.

[0024] The diagram is marked as follows:

[0025] 1. Tower body; 2. Base; 3. Tower plate; 4. Annular scraper; 5. Drainage trough; 6. Drainage port; 7. Reciprocating screw; 8. Motor; 9. Connecting rod; 10. Connecting plate; 11. Strip scraper; 12. Fixing plate; 13. Guide rod; 14. Spring; 15. Cleaning blade; 16. Limiting groove; 17. Limiting block; 18. Condenser; 19. Reboiler. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0027] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0028] like Figures 1 to 5 As shown, a methanol solvent recovery device for pigment intermediate processing includes a tower body 1, a base 2, a condenser 18, and a reboiler 19. The base 2 is connected to the bottom of the tower body 1. The gas phase pipe of the condenser 18 is connected to the top of the tower body 1, and the liquid phase pipe of the condenser 18 is connected to the reflux pipe of the tower body 1. The liquid inlet pipe of the reboiler 19 is connected to the liquid outlet pipe of the base 2, and the steam pipe of the reboiler 19 is connected to the side wall of the base 2. A tray 3 is slidably connected inside the tower body 1. Both the top and bottom surfaces are fixed with annular scrapers 4, each of which is fitted against the inner wall of the tower body 1. At least two drainage troughs 5 are provided on the inner wall of the tower body 1 near the base 2. Each annular scraper 4 is provided with a drainage port 6 corresponding to the drainage trough 5. A lifting assembly is installed inside the tower body 1, and the lifting assembly is drivenly connected to the tower plate 3. A cleaning assembly is installed inside the base 2, and the cleaning assembly is drivenly connected to the lifting assembly so that the cleaning assembly can clean the inner wall of the base 2.

[0029] As an optional embodiment, the lifting assembly includes:

[0030] A reciprocating screw 7 is disposed inside the tower body 1. One end of the reciprocating screw 7 passes through the top of the tower body 1 and is rotatably connected, while the other end is connected to the cleaning assembly. The tower plate 3 is sleeved on the reciprocating screw 7 and is connected by ball bearings.

[0031] The motor 8 is fixedly mounted on the top of the tower body 1, and the output shaft of the motor 8 is fixedly connected to one end of the reciprocating lead screw 7.

[0032] like Figure 1 and Figure 2As shown, when the inside of the tower body 1 needs to be cleaned, the motor 8 drives the reciprocating screw 7 to rotate, and the reciprocating screw 7 drives the tower plate 3 to move up and down reciprocally. The tower plate 3 drives the two annular scrapers 4 to move up and down, thereby scraping off the impurities adhering to the inner wall of the tower body 1.

[0033] As an optional embodiment, the cleaning component includes:

[0034] The connecting rod 9 has one end fixedly connected to the end of the reciprocating screw 7 away from the motor 8, and the other end rotatably connected to the inner bottom of the base 2;

[0035] At least one connecting plate 10, one end of which is fixedly connected to the connecting rod 9, and the other end is fixedly provided with an elastic element. The end of the elastic element away from the connecting plate 10 is provided with a strip scraper 11, and the strip scraper 11 is fitted to the inner wall of the base 2.

[0036] As an optional embodiment, the elastic element includes:

[0037] The fixing plate 12 is fixedly connected to the connecting plate 10 on one side, and multiple guide rods 13 are provided on the other side. One end of each guide rod 13 is fixedly connected to the strip scraper 11.

[0038] Multiple springs 14 are respectively sleeved on the guide rod 13, and the two ends of each spring 14 abut against the strip scraper 11 and the fixing plate 12 respectively.

[0039] like Figure 2 and Figure 5 As shown, the reciprocating screw 7 drives the connecting rod 9 to rotate, the connecting rod 9 drives the connecting plate 10 to rotate, the connecting plate 10 drives the fixing plate 12 to rotate, the fixing plate 12 drives the guide rod 13 to rotate, the guide rod 13 drives the strip scraper 11 to rotate, and the strip scraper 11 rotates against the inner wall of the base 2 under the action of the spring 14, thereby scraping off the impurities adhering to the inner wall of the base 2.

[0040] As an optional embodiment, a cleaning blade 15 is provided on the side of the connecting plate 10, and the cleaning blade 15 is fitted into the inner bottom of the base 2.

[0041] like Figure 2 and Figure 5 As shown, the cleaning blade 15 is driven to rotate along the inner bottom of the base 2 by the connecting plate 10, thereby scraping off the impurities adhering to the inner bottom of the base 2.

[0042] As an optional embodiment, at least one limiting groove 16 is provided on the inner wall of the tower body 1, and at least one limiting block 17 is fixed on the outer wall of the tower plate 3, and the limiting block 17 is adapted to be disposed in the limiting groove 16 so that the tower plate 3 can slide up and down in the tower body 1.

[0043] The working principle is as follows: When the tower body 1 needs cleaning, the lifting assembly moves the tower plate 3 up and down. The tower plate 3 moves the two annular scrapers 4 up and down, thereby scraping the impurities adhering to the inner wall of the tower body 1 onto the tower plate 3 and into the base 2. The lifting assembly also drives the cleaning assembly to clean the inner wall of the base 2. After cleaning, water is injected into the tower body 1 to rinse the tower plate 2. At this time, the tower plate 3 is located at the drain trough 5, and the drain outlet 6 is connected to the drain trough 5. The water flow will carry the impurities on the tower plate 3 through the drain outlet 6 out of the drain trough. 5 flows into the base 2 and is finally discharged from the drain pipe on the base 2, thus completing the impurity removal work of the tower body 1 and the base 2. After the impurity removal is completed, the tower plate 3 is moved upward by the lifting component until the drain port 6 is no longer connected to the drain tank 5, so that the tower body 1 and the base 2, together with the condenser 18 and the reboiler 19, can resume the distillation separation working state. The liquid phase pipe of the condenser 18 is also connected to the recovery tank for easy storage of the separated methanol. This utility model achieves the effect of efficient and quick cleaning of impurities adhering to the inner wall of the tower body 1, thereby improving the quality of methanol recovery.

[0044] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of this utility model is limited to these examples; within the framework of this utility model, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of this utility model as described above, which are not provided in the details for the sake of brevity. Any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A methanol solvent recovery device for pigment intermediate processing, comprising a tower body (1), a base (2), a condenser (18), and a reboiler (19), wherein the base (2) is connected to the bottom of the tower body (1), the gas phase pipe of the condenser (18) is connected to the top of the tower body (1), the liquid phase pipe of the condenser (18) is connected to the reflux pipe of the tower body (1), the liquid inlet pipe of the reboiler (19) is connected to the liquid outlet pipe of the base (2), and the steam pipe of the reboiler (19) is connected to the side wall of the base (2), characterized in that, The tower body (1) is slidably connected to a tower plate (3). Both the upper and lower surfaces of the tower plate (3) are fixed with annular scrapers (4). Each annular scraper (4) is fitted to the inner wall of the tower body (1). At least two drainage troughs (5) are provided on the inner wall of the tower body (1) near the base (2). Each annular scraper (4) is provided with a drainage port (6) corresponding to the drainage trough (5). The tower body (1) is equipped with a lifting assembly, which is connected to the tower plate (3). The base (2) is equipped with a cleaning assembly, which is connected to the lifting assembly, so that the cleaning assembly can clean the inner wall of the base (2).

2. The methanol solvent recovery device for processing of a pigment intermediate according to claim 1, characterized by The lifting assembly includes: A reciprocating screw (7) is installed inside the tower body (1). One end of the reciprocating screw (7) passes through the top of the tower body (1) and is rotatably connected. The other end is connected to the cleaning assembly. The tower plate (3) is sleeved on the reciprocating screw (7) and connected by ball bearings. The motor (8) is fixedly mounted on the top of the tower body (1), and the output shaft of the motor (8) is fixedly connected to one end of the reciprocating screw (7).

3. The methanol solvent recovery device for processing of a pigment intermediate according to claim 2, characterized by The cleanup components include: The connecting rod (9) has one end fixedly connected to the end of the reciprocating screw (7) away from the motor (8), and the other end rotatably connected to the inner bottom of the base (2); At least one connecting plate (10) is fixedly connected at one end to the connecting rod (9) and an elastic element is fixedly provided at the other end. A strip scraper (11) is provided at the end of the elastic element away from the connecting plate (10) and the strip scraper (11) is fitted to the inner wall of the base (2).

4. The methanol solvent recovery device for processing of a pigment intermediate according to claim 3, characterized by The elastic element includes: A fixing plate (12) is fixedly connected to the connecting plate (10) on one side, and multiple guide rods (13) are provided on the other side. One end of each guide rod (13) is fixedly connected to the strip scraper (11). Multiple springs (14) are respectively sleeved on the guide rod (13), and the two ends of each spring (14) abut against the strip scraper (11) and the fixing plate (12).

5. The methanol solvent recovery device for processing of a pigment intermediate according to claim 3, characterized by A cleaning blade (15) is provided on the side of the connecting plate (10), and the cleaning blade (15) is fitted into the inner bottom of the base (2).

6. The methanol solvent recovery device for processing of a pigment intermediate according to claim 1, characterized by The inner wall of the tower body (1) is provided with at least one limiting groove (16), and the outer wall of the tower plate (3) is fixed with at least one limiting block (17), and the limiting block (17) is adapted to be disposed in the limiting groove (16) so that the tower plate (3) can slide up and down in the tower body (1).

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