A catalyst recovery device for the preparation of dimethyl carbonate

Abstract

This utility model relates to a catalyst recovery device for dimethyl carbonate (DMC) preparation, belonging to the field of DMC preparation technology. It includes a recovery chamber with a mounting ring fixedly connected to its bottom surface. A clearance groove is formed on the back of the mounting ring. Inside the recovery chamber is a recovery assembly for catalyst recovery. The recovery assembly includes a partition plate fixedly connected inside the recovery chamber. A connecting chamber is placed on top of the partition plate. The inner top wall of the connecting chamber is rotatably connected via a bearing to an inlet pipe that extends through the connecting chamber and to the top of the recovery chamber. This catalyst recovery device for DMC preparation facilitates catalyst separation through a ceramic membrane. The rotation of the connecting chamber improves the separation effect. The separated catalyst is conveniently heated through a heating pipe and a connecting rod, resulting in high recovery efficiency, reduced production costs, and reduced solid waste emissions.

Description

Technical Field

[0001] This utility model relates to the field of dimethyl carbonate preparation technology, specifically to a catalyst recovery device for dimethyl carbonate preparation. Background Technology

[0002] Dimethyl carbonate (DMC) has a molecular weight of 90.08. It is a transparent liquid at room temperature with a slight odor. It is sparingly soluble in water but miscible with alcohols, ketones, and esters in any proportion. DMC is widely used in pesticides, pharmaceuticals, fragrances, fuel additives, solvents, and the electronics industry. The preparation of DMC commonly uses transesterification and urea alcoholysis. The catalysts are mostly homogeneous and heterogeneous.

[0003] In existing dimethyl carbonate preparation, catalysts are used to accelerate the preparation efficiency. However, after the dimethyl carbonate is prepared, it is not convenient to recover the catalyst. The catalyst has low separation efficiency, is prone to entrainment loss, and is difficult to regenerate, which reduces its effectiveness. Therefore, a catalyst recovery device for dimethyl carbonate preparation is proposed to solve the above problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a catalyst recovery device for the preparation of dimethyl carbonate, which has the advantage of improving recovery efficiency. It solves the problems of inconvenient catalyst recovery after the preparation of dimethyl carbonate, low separation efficiency, easy entrainment loss, and difficult regeneration, which reduce the effectiveness of the catalyst.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A catalyst recovery device for the preparation of dimethyl carbonate includes a recovery chamber, a mounting ring fixedly connected to the bottom surface of the recovery chamber, a clearance groove opened on the back side of the mounting ring, and a recovery component for recovering the catalyst inside the recovery chamber.

[0007] The recycling assembly includes a partition plate fixedly connected inside the recycling chamber. A connecting chamber is placed on top of the partition plate. An inlet pipe, extending through the connecting chamber and to the top of the recycling chamber, is rotatably connected to the inner top wall of the connecting chamber via a bearing. An mounting plate is fixedly connected inside the recycling chamber. A discharge pipe, extending through the partition plate and to the bottom of the mounting plate, is fixedly connected to the inner bottom wall of the recycling chamber. A ceramic membrane is fixedly embedded in the outer peripheral wall of the connecting chamber. A drive rod, extending through the recycling chamber and to the bottom of the discharge pipe, is rotatably connected to the bottom surface of the recycling chamber via a bearing. Multiple connecting rods are fixedly connected to the left and right sides of the drive rod. Heating tubes are fixedly installed inside the multiple connecting rods. A solenoid valve is fixedly installed on the outer peripheral wall of the discharge pipe. A discharge hole is opened on the bottom surface of the recycling chamber.

[0008] The recycling bin is equipped with a sealing assembly for sealing the discharge port.

[0009] The recycling bin is equipped with a drive assembly for rotating the drive rod.

[0010] Furthermore, both the recovery chamber and the connecting chamber are hollow cylinders. The liquid inlet pipe is rotatably connected to the recovery chamber via bearings, and the discharge pipe is rotatably connected to the mounting plate and the partition plate via two bearings respectively.

[0011] Furthermore, the solenoid valve is located between the mounting plate and the partition plate, the drive rod is a cylinder with a hollow interior and missing top and bottom surfaces, and the multiple connecting rods are all cylinders with a hollow interior and missing one side near the drive rod.

[0012] Furthermore, the sealing assembly includes a sealing plate placed inside the discharge hole. A rubber ring is fixedly embedded in the outer peripheral wall of the sealing plate. Electric push rods are fixedly installed on the left and right inner walls of the mounting ring. Sliding grooves are formed on the left and right inner walls of the mounting ring. Two sliding plates are fixedly connected to the bottom surface of the sealing plate, with one end extending into the two sliding grooves respectively. The output ends of the two electric push rods are fixedly connected to the two sliding plates respectively. The drive rod passes through the sealing plate and extends into the interior of the mounting ring. A liquid outlet pipe with one end passing through the recovery chamber and extending to its left side is fixedly connected to the left inner wall of the recovery chamber.

[0013] Furthermore, the rubber ring and the discharge hole are fitted together, and the drive rod is rotatably connected through a bearing and a sealing plate.

[0014] Furthermore, the sliding plate is an L-shaped plate, and the sliding plate and the sliding groove are slidably connected.

[0015] Furthermore, the drive assembly includes a drive motor, which is fixedly mounted on the bottom surface of the sealing plate. The output shaft of the drive motor is fixedly mounted with a driving bevel gear. The outer peripheral wall of the drive rod is fixedly mounted with a driven bevel gear that meshes with the driving bevel gear. Mounting rods are fixedly connected to both the front and back sides of the discharge pipe. Positioning holes are opened on the bottom surfaces of the two mounting rods. A connecting plate is fixedly connected to the top surface of the drive rod. Two positioning rods, each with one end extending into the two positioning holes, are fixedly connected to the top surface of the connecting plate.

[0016] Furthermore, the two positioning rods are respectively fitted with two positioning holes with clearance, and the connecting plate is located at the bottom of the discharge pipe.

[0017] Compared with the prior art, this utility model provides a catalyst recovery device for the preparation of dimethyl carbonate, which has the following beneficial effects:

[0018] 1. The catalyst recovery device for the preparation of dimethyl carbonate uses a ceramic membrane to easily separate the catalyst, and the separation effect is improved by rotating the connecting chamber. The separated catalyst is easily heated by the heating pipe and connecting rod, which improves the recovery efficiency, reduces production costs and reduces solid waste emissions.

[0019] 2. This catalyst recovery device for dimethyl carbonate preparation uses an electric push rod to move the sealing plate, facilitating the discharge of materials from the recovery chamber and making it easy for operators to work. Simultaneously, the gap between the positioning rod and the positioning hole allows for convenient connection between the drive rod and the discharge pipe, making it even more convenient and practical. Attached Figure Description

[0020] Figure 1 This is a three-dimensional view of the structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0022] Figure 3 This utility model Figure 2 Enlarged structural diagram of A in the middle;

[0023] Figure 4 This is an enlarged schematic diagram of the internal structure of the mounting ring in this utility model;

[0024] Figure 5 This is a schematic diagram of the internal structure of the connecting rod in this utility model.

[0025] In the diagram: 1. Recovery chamber, 2. Inlet pipe, 3. Outlet pipe, 4. Mounting ring, 5. Mounting plate, 6. Partition plate, 7. Connecting chamber, 8. Ceramic membrane, 9. Discharge pipe, 10. Solenoid valve, 11. Connecting rod, 12. Drive rod, 13. Relief groove, 14. Mounting rod, 15. Positioning hole, 16. Positioning rod, 17. Connecting plate, 18. Heating tube, 19. Rubber ring, 20. Discharge hole, 21. Driven bevel gear, 22. Sealing plate, 23. Driven bevel gear, 24. Drive motor, 25. Electric push rod, 26. Sliding plate, 27. Sliding groove. Detailed Implementation

[0026] 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.

[0027] Please see Figures 1 to 5In this embodiment, a catalyst recovery device for the preparation of dimethyl carbonate includes a recovery chamber 1. An installation ring 4 is fixedly connected to the bottom surface of the recovery chamber 1. A clearance groove 13 is provided on the back side of the installation ring 4. The interior of the recovery chamber 1 is provided with a recovery component for recovering the catalyst.

[0028] The recycling assembly includes a partition 6, which is fixedly connected inside the recycling chamber 1. A connecting chamber 7 is placed on top of the partition 6. The inner top wall of the connecting chamber 7 is rotatably connected to an inlet pipe 2 that extends through the connecting chamber 7 and to the top of the recycling chamber 1 via a bearing. An installation plate 5 is fixedly connected inside the recycling chamber 1. A discharge pipe 9 that extends through the partition 6 and to the bottom of the installation plate 5 is fixedly connected to the inner bottom wall of the recycling chamber 1. A ceramic membrane 8 is fixedly embedded in the outer peripheral wall of the connecting chamber 7. A drive rod 12 that extends through the recycling chamber 1 and to the bottom of the discharge pipe 9 is rotatably connected to the bottom surface of the recycling chamber 1 via a bearing. Multiple connecting rods 11 are fixedly connected to the left and right sides of the drive rod 12. A heating tube 18 is fixedly installed inside each of the multiple connecting rods 11. A solenoid valve 10 is fixedly installed on the outer peripheral wall of the discharge pipe 9. A discharge hole 20 is opened on the bottom surface of the recycling chamber 1.

[0029] The recovery chamber 1 and the connecting chamber 7 are both hollow cylinders. The liquid inlet pipe 2 is rotatably connected to the recovery chamber 1 through a bearing. The discharge pipe 9 is rotatably connected to the mounting plate 5 and the partition plate 6 through two bearings respectively. The solenoid valve 10 is located between the mounting plate 5 and the partition plate 6. The drive rod 12 is a hollow cylinder with missing top and bottom surfaces. The multiple connecting rods 11 are all hollow cylinders with missing sides near the drive rod 12.

[0030] Specifically, the discharge pipe 9 drives the connecting chamber 7 to rotate. The material enters the interior of the connecting chamber 7 through the inlet pipe 2. The material is filtered by the ceramic membrane 8, which retains the catalyst inside the connecting chamber 7. After separation, the solenoid valve 10 is activated, and the separated material is transported to the bottom of the recovery chamber 1 through the discharge pipe 9. The heating pipe 18 is activated to heat the material. The drive rod 12 drives the connecting rod 11 to rotate, which agitates the material and improves the heating efficiency.

[0031] It should be noted that the ceramic membrane 8, the solenoid valve 10, and the heating tube 18 are all conventional devices known to the public in the prior art, and their specific structures and working principles will not be described in detail in this article.

[0032] Please see Figures 1 to 5In this embodiment, the recovery chamber 1 is provided with a sealing assembly for sealing the discharge hole 20. The sealing assembly includes a sealing plate 22, which is placed inside the discharge hole 20. A rubber ring 19 is fixedly embedded in the outer peripheral wall of the sealing plate 22. Electric push rods 25 are fixedly installed on the left and right inner walls of the mounting ring 4. Sliding grooves 27 are opened on the left and right inner walls of the mounting ring 4. Two sliding plates 26 are fixedly connected to the bottom surface of the sealing plate 22, with one end extending into the two sliding grooves 27 respectively. The output ends of the two electric push rods 25 are fixedly connected to the two sliding plates 26 respectively. The drive rod 12 passes through the sealing plate 22 and extends into the interior of the mounting ring 4. A liquid outlet pipe 3 with one end passing through the recovery chamber 1 and extending to its left side is fixedly connected to the left inner wall of the recovery chamber 1.

[0033] Among them, the rubber ring 19 and the discharge hole 20 are fitted together, the drive rod 12 is rotatably connected through the bearing and the sealing plate 22, the sliding plate 26 is an L-shaped plate, and the sliding plate 26 and the sliding groove 27 are slidably connected.

[0034] Specifically, the electric push rod 25 is activated, and the output end of the electric push rod 25 drives the sliding plate 26 to move upward, so that the sealing plate 22 enters the interior of the discharge hole 20. The discharge hole 20 is sealed by the action of the rubber ring 19. The sealing plate 22 is supported by the sliding connection between the sliding plate 26 and the sliding groove 27, thereby improving the stability of the sealing plate 22.

[0035] It should be noted that the electric actuator 25 is a conventional device known in the prior art, and its specific structure and working principle will not be described in detail here. Furthermore, this application can ensure that the output ends of the two electric actuators 25 extend and retract simultaneously by using a synchronization controller or other synchronization device, thereby achieving synchronous operation. These synchronization devices are common and mature in the field of electric control, and therefore will not be described in detail in the specific embodiments.

[0036] Please see Figures 1 to 5 In this embodiment, the recycling bin 1 is provided with a drive assembly for driving the drive rod 12 to rotate. The drive assembly includes a drive motor 24, which is fixedly installed on the bottom surface of the sealing plate 22. The output shaft of the drive motor 24 is fixedly installed with a drive bevel gear 23. The outer peripheral wall of the drive rod 12 is fixedly installed with a driven bevel gear 21 that meshes with the drive bevel gear 23. The front and back of the discharge pipe 9 are fixedly connected with mounting rods 14. The bottom surface of the two mounting rods 14 is provided with positioning holes 15. The top surface of the drive rod 12 is fixedly connected with a connecting plate 17. The top surface of the connecting plate 17 is fixedly connected with two positioning rods 16, one end of which extends into the two positioning holes 15 respectively.

[0037] Among them, the two positioning rods 16 are respectively fitted with the two positioning holes 15 with clearance, and the connecting plate 17 is located at the bottom of the discharge pipe 9.

[0038] Specifically, the drive rod 12 enters the interior of the recycling bin 1, and the positioning rod 16 is inserted into the interior of the positioning hole 15. Through the clearance fit between the positioning rod 16 and the positioning hole 15, the discharge pipe 9 and the drive rod 12 are connected. The drive motor 24 is started, and the output shaft of the drive motor 24 drives the active bevel gear 23 to rotate. Through the meshing between the active bevel gear 23 and the driven bevel gear 21, the drive rod 12 is driven to rotate, thereby causing the discharge pipe 9 to rotate.

[0039] The working principle of the above embodiments is as follows:

[0040] The electric push rod 25 is activated, and its output end drives the sliding plate 26 upward, causing the sealing plate 22 to enter the discharge hole 20. The rubber ring 19 seals the discharge hole 20. The positioning rod 16 is inserted into the positioning hole 15, connecting the discharge pipe 9 and the drive rod 12. The drive motor 24 is activated, and its output shaft drives the driving bevel gear 23 to rotate. Through the meshing between the driving bevel gear 23 and the driven bevel gear 21, the drive rod 12 rotates, thereby causing the discharge pipe 9 to move upward. 9 rotates, and the discharge pipe 9 drives the connecting chamber 7 to rotate. The material enters the interior of the connecting chamber 7 through the inlet pipe 2. The material is filtered by the ceramic membrane 8, so that the catalyst is retained inside the connecting chamber 7. After separation, the solenoid valve 10 is activated, and the separated material is transported to the bottom of the recovery chamber 1 through the discharge pipe 9. The heating pipe 18 is activated to heat the material. The drive rod 12 drives the connecting rod 11 to rotate, agitating the material and improving heating efficiency.

[0041] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods. Any method that can achieve its beneficial effect can be implemented. In addition, the electrical components in this embodiment are all electrically connected to the main controller and the power supply. The main controller can be a conventional known device such as a computer that plays a control role. Those skilled in the art can control the electrical components through simple programming. Moreover, the existing disclosed power connection technology is also common knowledge in the field. Therefore, the specific structural composition and working principle will not be described in detail in this embodiment.

[0042] 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 a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0043] 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 catalyst recovery device for the preparation of dimethyl carbonate, comprising a recovery chamber (1), characterized in that: The bottom surface of the recovery chamber (1) is fixedly connected to an installation ring (4), and a clearance groove (13) is provided on the back side of the installation ring (4). The interior of the recovery chamber (1) is provided with a recovery component for recovering the catalyst. The recycling assembly includes a partition (6) fixedly connected inside the recycling chamber (1). A connecting chamber (7) is placed on top of the partition (6). The inner top wall of the connecting chamber (7) is rotatably connected by a bearing to an inlet pipe (2) that extends through the connecting chamber (7) to the top of the recycling chamber (1). An mounting plate (5) is fixedly connected inside the recycling chamber (1). A discharge pipe (9) is fixedly connected to the inner bottom wall of the recycling chamber (1) that extends through the partition (6) to the bottom of the mounting plate (5). (7) The outer peripheral wall is fixedly inlaid with a ceramic membrane (8). The bottom surface of the recycling bin (1) is rotatably connected by a bearing to a drive rod (12) that passes through the recycling bin (1) and extends to the bottom of the discharge pipe (9). The left and right sides of the drive rod (12) are fixedly connected with a number of connecting rods (11). The interior of the multiple connecting rods (11) is fixedly installed with heating tubes (18). The outer peripheral wall of the discharge pipe (9) is fixedly installed with a solenoid valve (10). The bottom surface of the recycling bin (1) is opened with a discharge hole (20). The recycling bin (1) is provided with a sealing assembly for sealing the discharge hole (20), and the recycling bin (1) is provided with a drive assembly for driving the drive rod (12) to rotate.

2. The catalyst recovery device for dimethyl carbonate preparation according to claim 1, characterized in that: The recovery chamber (1) and the connecting chamber (7) are both hollow cylinders. The liquid inlet pipe (2) is rotatably connected to the recovery chamber (1) through a bearing. The discharge pipe (9) is rotatably connected to the mounting plate (5) and the partition plate (6) through two bearings respectively.

3. The catalyst recovery device for dimethyl carbonate preparation according to claim 1, characterized in that: The solenoid valve (10) is located between the mounting plate (5) and the partition plate (6). The drive rod (12) is a cylinder with a hollow interior and missing top and bottom surfaces. The multiple connecting rods (11) are all cylinders with a hollow interior and missing one side near the drive rod (12).

4. The catalyst recovery device for dimethyl carbonate preparation according to claim 1, characterized in that: The sealing assembly includes a sealing plate (22), which is placed inside the discharge hole (20). A rubber ring (19) is fixedly embedded in the outer peripheral wall of the sealing plate (22). An electric push rod (25) is fixedly installed on the left inner wall and the right inner wall of the mounting ring (4). A sliding groove (27) is opened on the left inner wall and the right inner wall of the mounting ring (4). Two sliding plates (26) are fixedly connected to the bottom surface of the sealing plate (22), with one end extending into the two sliding grooves (27). The output ends of the two electric push rods (25) are fixedly connected to the two sliding plates (26). The drive rod (12) passes through the sealing plate (22) and extends into the interior of the mounting ring (4). A liquid outlet pipe (3) with one end passing through the recovery chamber (1) and extending to its left side is fixedly connected to the left inner wall of the recovery chamber (1).

5. A catalyst recovery device for the preparation of dimethyl carbonate according to claim 4, characterized in that: The rubber ring (19) and the discharge hole (20) are fitted together, and the drive rod (12) is rotatably connected by a bearing and a sealing plate (22).

6. A catalyst recovery device for the preparation of dimethyl carbonate according to claim 4, characterized in that: The sliding plate (26) is an L-shaped plate, and the sliding plate (26) and the sliding groove (27) are slidably connected.

7. A catalyst recovery device for the preparation of dimethyl carbonate according to claim 4, characterized in that: The drive assembly includes a drive motor (24), which is fixedly mounted on the bottom surface of the sealing plate (22). The output shaft of the drive motor (24) is fixedly mounted with a drive bevel gear (23). The outer peripheral wall of the drive rod (12) is fixedly mounted with a driven bevel gear (21) that meshes with the drive bevel gear (23). The front and back sides of the discharge pipe (9) are fixedly connected with mounting rods (14). The bottom surfaces of the two mounting rods (14) are provided with positioning holes (15). The top surface of the drive rod (12) is fixedly connected with a connecting plate (17). The top surface of the connecting plate (17) is fixedly connected with two positioning rods (16), one end of which extends into the two positioning holes (15).

8. A catalyst recovery device for the preparation of dimethyl carbonate according to claim 7, characterized in that: The two positioning rods (16) are respectively fitted with the two positioning holes (15) with clearance, and the connecting plate (17) is located at the bottom of the discharge pipe (9).

Images