Reaction equipment for continuous production of malonic acid

Abstract

This utility model relates to the field of malonic acid production technology and proposes a reaction device for continuous production of malonic acid. The device includes a base plate and a reaction vessel. Four evenly distributed support legs are connected to the bottom of the reaction vessel, with the bottom ends of the four support legs connected to the base plate. A partition plate is connected inside the reaction vessel, and a rotating shaft is rotatably connected to the partition plate. Reciprocating screws are connected to both the top and bottom ends of the rotating shaft. Threaded components are threaded onto both reciprocating screws, and rotating drums are rotatably connected to both threaded components. Multiple evenly distributed stirring rods are connected to the outer walls of both rotating drums. Two limiting rods are connected to the partition plate and are slidably connected to the two threaded components. A 7-shaped control component is connected to both reciprocating screws and is slidably connected to the stirring rods. A passage pipe is provided on the partition plate, and an electric valve is installed on the passage pipe. This improves the uniformity of material mixing and enhances the working efficiency of the equipment.

Description

Technical Field

[0001] This utility model relates to the field of malonic acid production technology, specifically to a reaction apparatus for the continuous production of malonic acid. Background Technology

[0002] Malonic acid can be prepared by reacting acrolein with oxygen at 150-200 degrees Celsius, usually in a reaction vessel.

[0003] A search revealed a Chinese patent publication dated July 2, 2024, CN221245176U, describing a continuous malonic acid production system. The system comprises a reactor with a lid at the top and a feed inlet on the lid. A discharge port is located at the bottom of the reactor. A partition plate divides the reactor's interior into two independent chambers. This system relates to the field of malonic acid production technology. By using a partition plate to divide the reactor's interior into two independent chambers, after the material in the reactor has reacted sufficiently, a valve on the discharge port is opened to discharge the material. When the material level is below the partition plate, the valve is closed, and new material continues to be injected into the upper chamber of the reactor through the second and first storage chambers. After the material in the lower chamber has been discharged, the valve is opened to fill the reactor with new material, ensuring the continuity of the reaction and thus guaranteeing continuous reaction operation.

[0004] Although the above-mentioned existing technical solutions can ensure continuous reaction, the device has poor uniformity in stirring and mixing materials, which may lead to incomplete reaction and reduce the working efficiency of the equipment. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides a reaction apparatus for the continuous production of malonic acid, thereby solving the problem mentioned in the background technology that poor uniformity of material mixing may lead to incomplete reaction and reduced equipment efficiency.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a reaction apparatus for continuous production of malonic acid, comprising a base plate and a reaction vessel. Four evenly distributed support legs are fixedly connected to the bottom end of the reaction vessel, and the bottom ends of all four support legs are fixedly connected to the base plate. A partition plate is fixedly connected inside the reaction vessel, and a rotating shaft is rotatably connected to the partition plate. Reciprocating screws are fixedly connected to both the top and bottom ends of the rotating shaft. Threaded components are threaded onto both reciprocating screws, and rotating cylinders are rotatably connected to both threaded components. Multiple evenly distributed stirring rods are fixedly connected to the outer walls of both rotating cylinders. Two limiting rods are fixedly connected to the plate and are slidably connected to two threaded parts respectively. A 7-shaped control component that is slidably connected to the stirring rod is fixedly connected to each of the two reciprocating screws. A through pipe is opened on the partition plate, and an electric valve is installed on the through pipe. The top of the reactor is provided with a top cover, and a motor connected to the reciprocating screw is installed on the top cover. Two storage tanks are fixedly connected to the bottom plate. A first pump body is installed on the outer wall of the storage tank. The feed end pipe of the first pump body leads to the inside of the storage tank. The water outlet end of the first pump body is connected to a conveying pipe that passes through the top cover. The top of each of the two storage tanks is provided with a feed port.

[0009] By adopting the above technical solution, the materials in the two storage tanks are driven into the reaction vessel by starting the two first pump bodies. The motor drives the two reciprocating screws to rotate. The limit rod is used to prevent the threaded parts from rotating. This causes the reciprocating screws to drive the threaded parts to move up and down. At this time, the rotation of the two reciprocating screws drives multiple stirring rods and two rotating drums to rotate, so that the stirring rods stir the materials. At this time, the threaded parts drive the rotating drums and stirring rods to move back and forth, thereby improving the uniformity of stirring the materials and thus improving the uniformity of material mixing, thereby achieving the purpose of improving the working effect of the equipment.

[0010] Optionally, a second pump body is installed on the outer wall of the reactor. The feed end and discharge end of the second pump body are respectively connected to a first pipe and a second pipe. One end of the first pipe and the second pipe are located below and above the partition, respectively.

[0011] By adopting the above technical solution, the partition reduces the mixing efficiency of materials between the two chambers in the reactor. The second pump is used to continuously input the material in the lower chamber into the upper chamber when the equipment is not in the discharge process, so as to facilitate the mixing of materials in the two chambers and thus improve the mixing effect of materials.

[0012] Optionally, the reactor is provided with a first through pipe and a second through pipe, the first through pipe is located above the second through pipe, the first through pipe is close to the bottom end of the partition, and a transparent liquid level pipe is provided between the first through pipe and the second through pipe.

[0013] By adopting the above technical solution, the first pipe, the second pipe and the transparent liquid level pipe are used to display the liquid level in the lower chamber. When the equipment discharges material, if the liquid level in the transparent liquid level pipe drops, it means that the lower chamber is not full. This indicates that the material in the upper chamber has been discharged. At this time, the electric valve can be closed so that the upper chamber can be refilled, thereby achieving the purpose of continuous reaction.

[0014] Optionally, the bottom end of the top cover is provided with a sealing gasket, and the bottom end of the sealing gasket is in close contact with the reaction vessel.

[0015] By adopting the above technical solution, the sealing gasket is used to improve the sealing performance of the equipment, prevent material spillage, and achieve the purpose of improving the stability of the equipment.

[0016] Optionally, both feed inlets are equipped with removable filters.

[0017] By adopting the above technical solution, the filter screen is used to prevent impurities from entering the storage tank, thereby preventing dust from entering the reaction vessel, thus achieving the purpose of improving the reaction effect of materials.

[0018] (III) Beneficial Effects

[0019] In summary, this utility model has at least one of the following beneficial technical effects:

[0020] This reaction apparatus for continuous production of malonic acid works by starting two first pumps to draw material from two storage tanks into the reactor. A motor drives two reciprocating screws to rotate, with a limit rod preventing rotation of the screw components. This causes the reciprocating screws to move the screw components up and down. The rotation of the two reciprocating screws drives multiple stirring rods and two rotating drums, causing the stirring rods to agitate the material. The reciprocating movement of the screw components and rotating drums improves the uniformity of material mixing, thus enhancing the overall efficiency of the equipment. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the first side view of the present invention;

[0022] Figure 2 This is a first cross-sectional view of the present invention.

[0023] Figure 3 This utility model Figure 2 A magnified schematic diagram of the partial structure at point A in the middle;

[0024] Figure 4 This utility model Figure 2 A magnified view of the structure at point B in the middle;

[0025] Figure 5 This is a second cross-sectional view of the present invention.

[0026] Figure 6 This utility model Figure 5 A magnified schematic diagram of the structure at point C.

[0027] In the diagram: 1. Base plate; 2. Reactor; 3. Support leg; 4. Baffle plate; 5. Rotating shaft; 6. Reciprocating screw; 7. Threaded component; 8. Rotary drum; 9. Stirring rod; 10. Limiting rod; 11. 7-shaped control component; 12. Through pipe; 13. Electric valve; 14. Top cover; 15. Motor; 16. Storage tank; 17. First pump body; 18. Conveying pipe; 19. Inlet; 20. Second pump body; 21. First pipeline; 22. Second pipeline; 23. First connecting pipe; 24. Second connecting pipe; 25. Transparent liquid level pipe; 26. Sealing gasket; 27. Filter screen. Detailed Implementation

[0028] 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.

[0029] The present invention will be further described in detail below with reference to the accompanying drawings.

[0030] Reference Figures 1-3A reaction apparatus for continuous production of malonic acid includes a base plate 1 and a reaction vessel 2. Four evenly distributed support legs 3 are fixedly connected to the bottom of the reaction vessel 2, and the bottom ends of the four support legs 3 are all fixedly connected to the base plate 1. A partition plate 4 is fixedly connected inside the reaction vessel 2. A rotating shaft 5 is rotatably connected to the partition plate 4. Reciprocating screws 6 are fixedly connected to both the top and bottom ends of the rotating shaft 5. Threaded parts 7 are threaded onto both reciprocating screws 6, and rotating drums 8 are rotatably connected to both threaded parts 7. Multiple evenly distributed stirring rods 9 are fixedly connected to the outer walls of both rotating drums 8. Two limiting rods 10 are fixedly connected to the partition plate 4 and slidably connected to the two threaded parts 7 respectively. 7-shaped control parts 11 are fixedly connected to both reciprocating screws 6 and slidably connected to the stirring rods 9. A passage pipe 12 is provided on the partition plate 4, and an electric valve 13 is installed on the passage pipe 12. A top cover 14 is provided at the top of the reaction vessel 2, and an electric valve connected to the reciprocating screws 6 is installed on the top cover 14. The machine 15 has two storage tanks 16 fixedly connected to the base plate 1. A first pump body 17 is installed on the outer wall of the storage tank 16. The feed end pipe of the first pump body 17 leads to the inside of the storage tank 16, and the water outlet end of the first pump body 17 is connected to a conveying pipe 18 that passes through the top cover 14. The top of each of the two storage tanks 16 is provided with a feed port 19. By starting the two first pump bodies 17, the material in the two storage tanks 16 is driven into the reaction vessel 2. The starting motor 15 drives the two reciprocating screws 6 to rotate. The limiting rod 10 is used to prevent the threaded part 7 from rotating, so that the reciprocating screws 6 drive the threaded part 7 to move up and down. At this time, when the two reciprocating screws 6 rotate, they drive multiple stirring rods 9 and two rotating drums 8 to rotate, so that the stirring rods 9 stir the material. At this time, the threaded part 7 drives the rotating drum 8 and stirring rods 9 to move back and forth, thereby improving the uniformity of stirring of the material by the stirring rods 9, thereby improving the uniformity of material mixing and achieving the purpose of improving the working effect of the equipment.

[0031] Reference Figure 1 and Figure 2 A second pump body 20 is installed on the outer wall of the reactor 2. The feed end and discharge end of the second pump body 20 are respectively connected to a first pipe 21 22 and a second pipe 23 22. One end of the first pipe 21 22 and the second pipe 23 22 are located below and above the partition 4, respectively. The partition 4 reduces the mixing efficiency of materials between the two chambers in the reactor 2. The second pump body 20 is used to continuously input the material in the lower chamber into the upper chamber when the equipment is not in the discharge process, so as to facilitate the mixing of materials in the two chambers and thus improve the mixing effect of materials.

[0032] Reference Figure 2The reactor 2 is equipped with a first through pipe 24 and a second through pipe 25. The first through pipe 24 is located above the second through pipe 25 and is close to the bottom of the partition plate 4. A transparent liquid level pipe 26 is provided between the first through pipe 24 and the second through pipe 25. The first through pipe 24, the second through pipe 25 and the transparent liquid level pipe 26 work together to display the liquid level in the lower chamber. When the equipment discharges material, if the liquid level in the transparent liquid level pipe 26 drops, it means that the lower chamber is not full. This indicates that the material in the upper chamber has been discharged. At this time, the electric valve 13 can be closed so that the upper chamber can be refilled to achieve the purpose of continuous reaction.

[0033] Reference Figure 2 and Figure 4 The bottom of the top cover 14 is provided with a sealing gasket 27. The bottom of the sealing gasket 27 is in close contact with the reactor 2. The sealing gasket 27 is used to improve the sealing performance of the equipment, prevent material from overflowing, and improve the stability of the equipment.

[0034] Reference Figure 5 and Figure 6 Both feed inlets 19 are equipped with removable filters 28. The filters 28 are used to prevent impurities from entering the storage tank 16, thereby preventing dust from entering the reactor 2, thus improving the reaction effect of the materials.

[0035] In summary, the working principle and process of this reaction device for continuous production of malonic acid are as follows: During operation, the two first pumps 17 are activated to drive the material from the two storage tanks 16 into the reaction vessel 2. The motor 15 is then activated to drive the two reciprocating screws 6 to rotate. A limiting rod 10 is used to prevent the threaded component 7 from rotating, thus causing the reciprocating screws 6 to move the threaded component 7 up and down. At this time, the rotation of the two reciprocating screws 6 drives multiple stirring rods 9 and two rotating drums 8 to rotate, causing the stirring rods 9 to stir the material. The threaded component 7 then drives the rotating drums 8 and stirring rods 9 to move back and forth, thereby improving the uniformity of the stirring rods 9 in stirring the material, thus improving the uniformity of the material mixing and achieving the purpose of improving the equipment's working effect. The partition 4 reduces the mixing efficiency of the material between the two chambers in the reaction vessel 2. The second pump 20 is used to... During the discharge process, the material in the lower chamber is continuously fed into the upper chamber to facilitate mixing between the two chambers and improve the mixing effect. The first pipe 24, the second pipe 25, and the transparent liquid level pipe 26 work together to display the liquid level in the lower chamber. When the liquid level in the transparent liquid level pipe 26 drops during discharge, it indicates that the lower chamber is not full, meaning that the material in the upper chamber has been discharged. At this point, the electric valve 13 can be closed to allow the upper chamber to be refilled, thus achieving the purpose of continuous reaction. The sealing gasket 27 is used to improve the sealing of the equipment and prevent material spillage, thereby improving the stability of the equipment. The filter screen 28 is used to prevent impurities from entering the storage tank 16 and dust from entering the reactor 2, thereby improving the material reaction effect.

[0036] The embodiments described above merely illustrate specific implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A reaction apparatus for continuous production of malonic acid, comprising a base plate (1), characterized in that: The reactor includes a reaction vessel (2), with four evenly distributed support legs (3) fixedly connected to the bottom end of the reaction vessel (2). The bottom ends of the four support legs (3) are all fixedly connected to the bottom plate (1). A partition plate (4) is fixedly connected inside the reaction vessel (2). A rotating shaft (5) is rotatably connected to the partition plate (4). A reciprocating screw (6) is fixedly connected to the top and bottom ends of the rotating shaft (5). Threaded parts (7) are threadedly connected to the two reciprocating screws (6). Rotary cylinders (8) are rotatably connected to the two threaded parts (7). Multiple evenly distributed stirring rods (9) are fixedly connected to the outer walls of the two rotary cylinders (8). Two limiting rods (10) are fixedly connected to the partition plate (4) and are slidably connected to the two threaded parts (7). Each screw (6) is fixedly connected with a shape control component that is slidably connected to the stirring rod (9). The partition (4) is provided with a through pipe (12), and an electric valve (13) is installed on the through pipe (12). The top of the reactor (2) is provided with a top cover (14), and a motor (15) connected to the reciprocating screw (6) is installed on the top cover (14). Two storage tanks (16) are fixedly connected to the bottom plate (1). A first pump body (17) is installed on the outer wall of the storage tank (16). The feed end pipe of the first pump body (17) leads to the inside of the storage tank (16). The water outlet of the first pump body (17) is connected to a conveying pipe (18) that passes through the top cover (14). The top of each of the two storage tanks (16) is provided with a feed port (19).

2. The reaction apparatus for continuous production of malonic acid according to claim 1, characterized in that: A second pump body (20) is installed on the outer wall of the reactor (2). The feed end and discharge end of the second pump body (20) are respectively connected to a first pipe (21) and a second pipe (22). One end of the first pipe (21) and the second pipe (22) are located below and above the partition plate (4), respectively.

3. The reaction apparatus for continuous production of malonic acid according to claim 1, characterized in that: The reactor (2) is provided with a first pipe (23) and a second pipe (24). The first pipe (23) is located above the second pipe (24). The first pipe (23) is close to the bottom end of the partition (4). A transparent liquid level pipe (25) is provided between the first pipe (23) and the second pipe (24).

4. The reaction apparatus for continuous production of malonic acid according to claim 1, characterized in that: The bottom end of the top cover (14) is provided with a sealing gasket (26), and the bottom end of the sealing gasket (26) is in close contact with the reactor (2).

5. The reaction apparatus for continuous production of malonic acid according to claim 1, characterized in that: Both feed inlets (19) are equipped with removable filters (27).

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