Esterification reaction device with sulfuric acid feeder

Abstract

The utility model relates to the technical field of esterification reaction, in particular to an esterification reaction device with a sulfuric acid feeder, which comprises a reaction kettle main body, a sulfuric acid feeder main body, an inner coil pipe, a stirring component and a cleaning component, the stirring assembly is connected to the reaction kettle body and comprises a driving device, a stirring shaft, a turbine stirrer and a linkage piece. According to the inner coil pipe cleaning device, the cleaning scraper on the connecting frame rotates along with the connecting frame, the cleaning scraper is guided by the appearance of the inner coil pipe while rotating, the cleaning scraper moves along the outer wall of the spirally rotating inner coil pipe, and meanwhile the sliding seat can move along the guide rod to guide and limit the cleaning scraper. The outer wall of the inner coil pipe is cleaned through rotation of the cleaning scraper, and the heating effect is prevented from being affected by adhesion and crystallization of substances on the outer wall of the inner coil pipe.

Description

Technical Field

[0001] This utility model relates to the field of esterification reaction technology, specifically to an esterification reaction apparatus with a sulfuric acid feeder. Background Technology

[0002] The basic process for producing fatty acid methyl esters involves first mixing and heating acidified oil and methanol, then esterifying the mixture under the catalysis of sulfuric acid. Because esterification is a reversible reaction, water in the reaction system has a significant impact. Therefore, concentrated sulfuric acid is used to achieve a higher degree of esterification. In this process, acidified oil and methanol are first mixed and heated, and then concentrated sulfuric acid is added using a pump or other equipment.

[0003] Chinese Patent CN203833915U discloses an esterification reaction apparatus with a sulfuric acid feeder, comprising an esterification reactor, a sulfuric acid feed pipe, an acidified oil feed pipe, a methanol feed pipe, and a feed distributor. The methanol, sulfuric acid, and acidified oil feed pipes are respectively installed on the esterification reactor. The sulfuric acid feed pipe is connected to the feed distributor. A stirrer is installed inside the esterification reactor, and a feed control valve is installed on the sulfuric acid feed pipe. This invention improves the degree of esterification and the utilization rate of raw materials without causing side reactions that affect product quality. By adjusting the sulfuric acid feed flow rate, the amount of sulfuric acid used can be controlled, avoiding waste and difficult-to-treat acid water from excessive addition, as well as incomplete esterification due to insufficient addition. Furthermore, it avoids the dark color and low yield of the acidified oil caused by carbonization.

[0004] However, in the above technical solution, the amount of sulfuric acid can be controlled by simply adjusting the feed flow rate. This avoids the waste and difficulty in treating acid water caused by adding too much sulfuric acid, as well as the incomplete esterification caused by adding too little sulfuric acid. However, existing esterification kettles are often equipped with internal coils for heating the liquid. During the liquid reaction inside the esterification kettle, crystallization or carbonization products are prone to adhering to the internal coils, which can easily lead to uneven temperature during subsequent use. Utility Model Content

[0005] The purpose of this invention is to address the problems existing in the background technology by proposing an esterification reaction device with a sulfuric acid feeder.

[0006] The technical solution of this utility model is as follows: An esterification reaction device with a sulfuric acid feeder includes a reaction vessel body connected to a sulfuric acid feeder body; an inner coil connected to the inner wall of the reaction vessel, the inner coil being spirally arranged; a stirring assembly connected to the reaction vessel body, the stirring assembly including a drive device, a stirring shaft, a turbine agitator, and a linkage component, the output end of the drive device being connected to the stirring shaft, the stirring shaft being disposed on the reaction vessel body, one end of the stirring shaft passing through the reaction vessel body and connected to the output end of the drive device, the other end of the stirring shaft being connected to the turbine agitator, and the linkage component being connected to the stirring shaft; and a cleaning assembly connected to the stirring assembly, the cleaning assembly including a connecting frame, guide components, and a cleaning scraper, the connecting frame being disposed inside the reaction vessel body, multiple protrusions connected to the connecting frame, the protrusions being slidably connected to the linkage component, multiple guide components connected to the connecting frame, each guide component being connected to a cleaning scraper, one end of the cleaning scraper conforming to the shape of the spiral inner coil; in the use state of the cleaning assembly, the connecting frame rotates synchronously with the linkage component, the cleaning scraper rotates with the connecting frame and contacts the inner coil and moves along the vertical direction of the guide components.

[0007] Preferably, the linkage consists of a mounting plate and trigger rods. The mounting plate is connected to the stirring shaft, and multiple trigger rods are connected to the side of the mounting plate near the connecting frame.

[0008] Preferably, the stirring assembly further includes multiple splined rods connected to the reactor body; a support plate slidably connected to the splined rods, with a splined sleeve corresponding to the splined rod connected to the support plate; and multiple telescopic devices connected to the reactor body, with the telescopic end of the telescopic device connected to the support plate.

[0009] Preferably, the connecting frame consists of a ring body, connecting rods, and a rotating ring. The two ring bodies are arranged in parallel, with a protrusion connected to the top ring body. Multiple connecting rods are connected to the ring bodies, and the rotating ring is connected to multiple support legs, which are connected to the reactor body.

[0010] Preferably, the guide component consists of a fixed seat, a guide rod, and a sliding seat. The two ends of the guide rod are connected to symmetrically arranged fixed seats, which are connected to the connecting rod. The sliding seat is slidably connected to the guide rod, and the cleaning scraper is connected to the sliding seat.

[0011] Preferably, the main body of the sulfuric acid feeder consists of a feed pipe and a distribution pipe. The feed pipe is connected to the main body of the reactor and is equipped with a regulating valve. One end of the feed pipe is connected to the distribution pipe, which has multiple discharge holes.

[0012] Preferably, the diameter of the discharge hole gradually increases in the horizontal direction from the end closer to the feed pipe to the end farther away from the feed pipe.

[0013] Compared with the prior art, the above-mentioned technical solution of this utility model has the following beneficial technical effects:

[0014] In this invention, the telescopic device in the stirring assembly can drive the linkage to contact the cleaning assembly and drive it to rotate. The cleaning scraper on the connecting frame rotates with the connecting frame and is guided by the shape of the inner coil. The cleaning scraper moves along the outer wall of the spiral inner coil. At the same time, the sliding seat can move along the guide rod to guide and restrict the cleaning scraper. The outer wall of the inner coil is cleaned by the rotation of the cleaning scraper, preventing the adhesion and crystallization of substances on the outer wall of the inner coil from affecting its heating effect. Attached Figure Description

[0015] Figure 1 This is a perspective view of the present utility model;

[0016] Figure 2 for Figure 1 A cross-sectional view;

[0017] Figure 3 A schematic diagram of the cleanup component structure;

[0018] Figure 4 for Figure 3 Enlarged view of the structure at point A;

[0019] Figure 5 This is a schematic diagram of the material distribution pipe structure.

[0020] Reference numerals: 1. Reactor body; 2. Sulfuric acid feeder body; 3. Inner coil; 4. Drive unit; 5. Stirring shaft; 6. Turbine stirrer; 7. Linkage component; 8. Connecting frame; 9. Guide component; 10. Cleaning scraper; 11. Protrusion; 12. Mounting plate; 13. Trigger rod; 14. Spline rod; 15. Support plate; 16. Telescopic device; 17. Ring body; 18. Connecting rod; 19. Rotating ring; 20. Fixed seat; 21. Guide rod; 22. Sliding seat; 23. Feed pipe; 24. Distributor pipe; 25. Discharge hole. Detailed Implementation

[0021] Example 1

[0022] like Figures 1-5As shown, the present invention proposes an esterification reaction device with a sulfuric acid feeder, comprising a reaction vessel body 1, a sulfuric acid feeder body 2, an inner coil 3, a stirring assembly, and a cleaning assembly. The reaction vessel body 1 is connected to the sulfuric acid feeder body 2. The inner coil 3 is connected to the inner wall of the reaction vessel and is arranged in a spiral shape. The stirring assembly is connected to the reaction vessel body 1 and includes a drive device 4, a stirring shaft 5, a turbine stirrer 6, and a linkage 7. The output end of the drive device 4 is connected to the stirring shaft 5. The drive device 4 may be, but is not limited to, a motor. The stirring shaft 5 is mounted on the reaction vessel body 1, and one end of the stirring shaft 5 passes through the reaction vessel body 1 and connects to the output end of the drive device 4. The other end of the stirring shaft 5 is connected to the turbine stirrer 6, and the linkage 7 is connected to the stirring shaft 5. The cleaning component is connected to the stirring component and includes a connecting frame 8, a guide 9, and a cleaning scraper 10. The connecting frame 8 is set inside the reactor body 1. Multiple protrusions 11 are connected to the connecting frame 8. The protrusions 11 are slidably connected to the linkage 7. Multiple guides 9 are connected to the connecting frame 8. Each guide 9 is connected to the cleaning scraper 10. One end of the cleaning scraper 10 fits the shape of the spiral inner coil 3. When the cleaning component is in use, the connecting frame 8 rotates synchronously with the linkage 7. The cleaning scraper 10 rotates with the connecting frame 8, contacts the inner coil 3, and moves vertically along the guide 9.

[0023] In an optional embodiment, the sulfuric acid feeder body 2 consists of a feed pipe 23 and a distribution pipe 24. The feed pipe 23 is connected to the reactor body 1 and a regulating valve is connected to the feed pipe 23. One end of the feed pipe 23 is connected to the distribution pipe 24, and the distribution pipe 24 has multiple discharge holes 25.

[0024] In an optional embodiment, the discharge hole 25 gradually increases in diameter in the horizontal direction from the end near the feed pipe 23 to the end far from the feed pipe 23; the diameter at the far end is larger than that at the near end to prevent the small holes in the front section from competing for flow and the small holes in the back section from dripping insufficiently, forming a distribution that is dense in the front and sparse in the back, so that the liquid is evenly distributed.

[0025] Example 2

[0026] like Figure 2 As shown, this utility model proposes an esterification reaction device with a sulfuric acid feeder. Compared with Embodiment 1, this embodiment also describes the detailed structure of the stirring assembly. The stirring assembly includes a splined rod 14, a support plate 15, and a telescopic device 16. Multiple splined rods 14 are distributed and connected to the reactor body 1. The support plate 15 is slidably connected to the splined rod 14, and a splined sleeve corresponding to the splined rod 14 is connected to the support plate 15. The splined rod 14 and the splined sleeve cooperate to reduce the influence of torque on the telescopic device 16 and the support plate 15. Multiple telescopic devices 16 are distributed and connected to the reactor body 1. The telescopic end of the telescopic device 16 is connected to the support plate 15. The telescopic device 16 is selected from, but is not limited to, a hydraulic cylinder.

[0027] In an optional embodiment, the linkage 7 consists of a mounting plate 12 and trigger rods 13. The mounting plate 12 is connected to the stirring shaft 5, and multiple trigger rods 13 are connected to the side of the mounting plate 12 near the connecting frame 8.

[0028] Example 3

[0029] like Figures 2-4 As shown, the present invention proposes an esterification reaction device with a sulfuric acid feeder. Compared with Embodiment 2, this embodiment also describes the detailed structure of the cleaning component. The guide 9 consists of a fixed seat 20, a guide rod 21 and a sliding seat 22. The two ends of the guide rod 21 are connected to the symmetrically arranged fixed seats 20. The fixed seats 20 are connected to the connecting rod 18. The sliding seat 22 is slidably connected to the guide rod 21. The cleaning scraper 10 is connected to the sliding seat 22.

[0030] In an optional embodiment, the connecting frame 8 consists of a ring body 17, connecting rods 18, and a rotating ring 19. The two ring bodies 17 are arranged in parallel, and the protrusion 11 is connected to the top ring body 17. Multiple connecting rods 18 are rotatably connected to the ring body 17 bearings. The rotating ring 19 is connected to multiple support legs, and the support legs are connected to the reactor body 1.

[0031] In this invention, an external conveying device or pump is activated to deliver sulfuric acid into the sulfuric acid feeder body 2. After the valve on the sulfuric acid feeder body 2 is opened, the sulfuric acid enters the distribution pipe 24 through the feed pipe 23. The gradually increasing aperture of the distribution pipe 24 ensures uniform distribution of the sulfuric acid, preventing excessively high local concentrations. Then, the drive device 4 is activated, and its output drives the stirring shaft 5 and turbine agitator 6 to rotate, mixing and stirring the liquid to prevent stratification and uneven distribution that could lead to acidification and carbonization of the oil. Simultaneously, heating or cooling media are injected into the inner coil 3 to control the temperature inside the reactor body 1. When the liquid inside the reactor body 1 needs to be drained and cleaned, the drive device 4 moves downward, driving the support plate 15 to move along the central axis of the spline rod 14. The mounting plate 12 connected to the top drives the trigger rod 13 to move down. When it moves down, it can be inserted between adjacent protrusions 11. If it is in contact with the protrusion 11, it can also push the connecting frame 8 to rotate through the inclined surface on the top of the protrusion 11 and then enter between the protrusions 11. After it moves down, when the drive device 4 is started, it will push the connecting frame 8 to rotate on the rotating ring 19 through the contact between the trigger rod 13 and the protrusion 11. While it is rotating, the cleaning scraper 10 contacts the spiral inner coil 3 and scrapes it. The shape of the inner coil 3 causes the cleaning scraper 10 to gradually move up, so that the cleaning scraper 10 and the sliding seat 22 move along the guide rod 21. After moving a certain number of circles, it can be reversed to return to the original position. Cleaning the surface of the inner coil 3 can prevent the adhesion of external substances, which may cause local overheating or low temperature when it is heated.

[0032] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. An esterification reaction apparatus equipped with a sulfuric acid feeder, characterized in that, include The main body of the reactor (1) is connected to the main body of the sulfuric acid feeder (2); The inner coil (3) is connected to the inner wall of the reactor and is arranged in a spiral shape. The stirring assembly is connected to the reactor body (1). The stirring assembly includes a drive device (4), a stirring shaft (5), a turbine stirrer (6), and a linkage (7). The output end of the drive device (4) is connected to the stirring shaft (5). The stirring shaft (5) is set on the reactor body (1). One end of the stirring shaft (5) passes through the reactor body (1) and is connected to the output end of the drive device (4). The other end of the stirring shaft (5) is connected to the turbine stirrer (6). The linkage (7) is connected to the stirring shaft (5). The cleaning component is connected to the stirring component. The cleaning component includes a connecting frame (8), a guide (9), and a cleaning scraper (10). The connecting frame (8) is set inside the reactor body (1). Multiple protrusions (11) are connected to the connecting frame (8). The protrusions (11) are slidably connected to the linkage (7). Multiple guides (9) are connected to the connecting frame (8). Each guide (9) is connected to the cleaning scraper (10). One end of the cleaning scraper (10) fits the shape of the spiral inner coil (3). When the cleaning component is in use, the connecting frame (8) rotates synchronously with the linkage (7). The cleaning scraper (10) rotates with the connecting frame (8) and contacts the inner coil (3) and moves vertically along the guide (9).

2. The esterification reaction apparatus with a sulfuric acid feeder according to claim 1, characterized in that, The linkage (7) consists of a mounting plate (12) and a trigger rod (13). The mounting plate (12) is connected to the stirring shaft (5), and multiple trigger rods (13) are connected to the side of the mounting plate (12) near the connecting frame (8).

3. The esterification reaction apparatus with a sulfuric acid feeder according to claim 1, characterized in that, The stirring assembly also includes Spline rods (14) are distributed in multiples and are connected to the reactor body (1). A support plate (15) is slidably connected to a spline rod (14), and a spline sleeve corresponding to the spline rod (14) is connected to the support plate (15); There are multiple telescopic devices (16). The telescopic devices (16) are connected to the main body (1) of the reactor. The telescopic end of the telescopic device (16) is connected to the support plate (15).

4. The esterification reaction apparatus with a sulfuric acid feeder according to claim 1, characterized in that, The connecting frame (8) consists of a ring body (17), a connecting rod (18), and a rotating ring (19). The two ring bodies (17) are arranged in parallel, and the protrusion (11) is connected to the top ring body (17). Multiple connecting rods (18) are connected to the ring body (17), and the rotating ring (19) is connected to multiple support legs, which are connected to the reactor body (1).

5. An esterification reaction apparatus with a sulfuric acid feeder according to claim 1, characterized in that, The guide (9) consists of a fixed seat (20), a guide rod (21) and a sliding seat (22). The guide rod (21) is connected to the fixed seats (20) which are symmetrically arranged at both ends. The fixed seats (20) are connected to the connecting rod (18). The sliding seat (22) is slidably connected to the guide rod (21). The cleaning scraper (10) is connected to the sliding seat (22).

6. The esterification reaction apparatus with a sulfuric acid feeder according to claim 1, characterized in that, The main body (2) of the sulfuric acid feeder consists of a feed pipe (23) and a distribution pipe (24). The feed pipe (23) is connected to the main body (1) of the reactor. A regulating valve is connected to the feed pipe (23). One end of the feed pipe (23) is connected to the distribution pipe (24). Multiple discharge holes (25) are opened on the distribution pipe (24).

7. An esterification reaction apparatus with a sulfuric acid feeder according to claim 6, characterized in that, The diameter of the discharge hole (25) gradually increases in the horizontal direction from the end closer to the feed pipe (23) to the end farther away from the feed pipe (23).

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