A cooler for maleic anhydride

Abstract

This utility model relates to the technical field of maleic anhydride production, specifically to a cooler for maleic anhydride, including a tank assembly. The tank assembly has an inlet and an outlet connected to both ends, and both ends of the tank assembly are connected to a flow guide pipe. An upper cooling medium pipe and a lower cooling medium pipe are embedded in the upper and lower ends of the tank assembly, respectively. A drain pipe is fixedly connected to the bottom end of the tank assembly. The tank assembly includes an outer tank and an inner tank. The flow guide pipes deliver external airflow between the inner and outer tanks, reducing the temperature difference between the inside and outside of the device. This effectively ensures that the temperature between the cooling medium pipes and the inner and outer tanks remains within a reasonable range, preventing cracks caused by deformation of the cooling medium pipes and tanks, and reducing gas leakage. The inner and outer tanks, combined with a support frame, provide a flow channel for the flow guide pipes and effectively ensure the strength and stability of the inner and outer tanks.

Description

Technical Field

[0001] This utility model relates to the technical field of maleic anhydride production, and specifically to a cooler for maleic anhydride. Background Technology

[0002] Maleic anhydride is a commonly used and important basic organic chemical raw material. It is the world's third largest acid anhydride raw material after acetic anhydride and phthalic anhydride. It is a raw material for manufacturing automotive parts, ships, corrosion-resistant chemical equipment and daily necessities. It is also an important intermediate in the production of lubricating oil additives, coatings, pesticides, fumaric acid, copolymers, food additives and other products.

[0003] Maleic anhydride requires cooling during production. However, existing cooling devices divide the internal space of the shell into multiple areas using internal partitions. This results in slow gas flow and uneven cooling, which needs to be improved. Additionally, the internal temperature of the device will be unevenly distributed. Furthermore, the liquid generated during cooling will be separated in different parts of the shell, making it inconvenient to drain and collect. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a cooler for maleic anhydride that can solve the following problems:

[0005] Existing cooling devices divide the internal space of the casing into multiple areas through internal partitions, which results in slow gas flow and uneven cooling. The cooling effect needs to be improved. At the same time, the internal temperature of the device will be unevenly distributed. In addition, the liquid generated during the cooling process will be separated in different parts of the casing, making it inconvenient to drain and collect.

[0006] To solve the above-mentioned technical problems, the present invention proposes the following technical solution:

[0007] A cooler for maleic anhydride includes a tank assembly. An air inlet and an air outlet are connected to both ends of the tank assembly. Guide pipes are connected to both front ends of the tank assembly. An upper cooling medium pipe and a lower cooling medium pipe are embedded in the upper and lower ends of the tank assembly, respectively. A drain pipe is fixedly connected to the bottom end of the tank assembly. The tank assembly includes an outer tank and an inner tank, which are arranged internally and externally. A support frame is fixedly connected between the outer and inner tanks. Auxiliary cooling pipes are provided on both sides of the upper cooling medium pipe. An inner cooling pipe and a flow divider are fixedly connected inside the inner tank. An auxiliary protrusion is fixedly connected between the outer and inner tanks.

[0008] Furthermore, two sets of guide pipes are provided, distributed at the same horizontal outer position of the air inlet and air outlet, and a guide fan is provided in the guide pipe located at the air inlet.

[0009] Furthermore, the diversion pipe is also connected to the outer tank and the inner tank.

[0010] Furthermore, the outer tank is rectangular in the middle and has semi-circular outward protrusions at both ends, while the inner tank is elliptical in shape and has semi-circular outward protrusions at both ends. The inner and outer tanks are fixed together by a support frame.

[0011] Furthermore, the support frame includes multiple sets of frame bodies arranged longitudinally in an "L" shape, and its overall side view is triangular. The upper and lower ends of the support frame are respectively fixedly connected to the middle corner of the outer tank and the surface of the inner tank.

[0012] Furthermore, the auxiliary cooling pipe and the upper cooling medium pipe are both configured as cooling medium delivery pipes, with their bottom ends bent outwards and fixedly connected to the top of the inner cooling pipe.

[0013] Furthermore, there are two sets of internal cooling pipes distributed opposite each other, which are fixedly connected to both ends of the inner tank in an inclined state, and the internal cooling pipes are arranged in a rectangular frame shape.

[0014] Furthermore, two sets of drain pipes are vertically arranged in an "L" shape and are connected to the inner tank. They are located on both sides of the lower cooling medium pipe, and control valves are installed at the bottom of the drain pipes.

[0015] Furthermore, the auxiliary protrusion is set in a hemispherical shape along the inner wall between the outer tank and the inner tank, and the auxiliary protrusion is also close to the air inlet end.

[0016] As can be seen from the above technical solution, the beneficial effects of this utility model are:

[0017] 1. This utility model achieves the effect of conveying external airflow into the space between the inner and outer tanks through the guide pipe, thereby reducing the temperature difference between the inside and outside of the overall device. It can effectively ensure that the temperature between the cooling medium pipe and the inner and outer tanks is kept within a reasonable range, preventing the cooling medium pipe and tanks from cracking due to deformation and reducing gas leakage.

[0018] 2. This utility model, by using inner and outer tanks, provides a flow channel for the flow guide pipe while the support frame effectively ensures the strength and stability of the inner and outer tanks. The "L"-shaped support frame avoids obstructing the external airflow between the inner and outer tanks. At the same time, the elliptical inner tank facilitates the drainage of liquid generated during the cooling process.

[0019] 3. This utility model achieves the effect of cooling external maleic anhydride gas entering the inner tank through auxiliary cooling pipes and internal cooling pipes, and achieves the effect of discharging the liquid generated during the cooling process through drainage pipes.

[0020] 4. This utility model extends the flow time of external airflow between the inner and outer tanks by using auxiliary protrusions, thereby ensuring continuous flow of external airflow between the inner and outer tanks and reducing energy consumption. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0022] Figure 1 This is a front view of the overall structure of this utility model;

[0023] Figure 2 This is a front view of the internal structure connection in this utility model;

[0024] Figure 3 This is a front view of the internal structure distribution in this utility model.

[0025] Figure label:

[0026] 1. Tank assembly; 2. Air inlet; 3. Air outlet; 4. Guide pipe; 5. Upper cooling medium pipe; 6. Lower cooling medium pipe; 7. Drain pipe; 8. Outer tank; 9. Inner tank; 10. Support frame; 11. Auxiliary cooling pipe; 12. Inner cooling pipe; 13. Diverter plate; 14. Auxiliary protrusion. Detailed Implementation

[0027] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0028] See Figure 1-3 As shown, a cooler for maleic anhydride includes a tank assembly 1. An air inlet 2 and an air outlet 3 are connected to both ends of the tank assembly 1. A guide pipe 4 is connected to both front ends of the tank assembly 1. An upper cooling medium pipe 5 and a lower cooling medium pipe 6 are embedded at the upper and lower ends of the tank assembly 1, respectively. A drain pipe 7 is fixedly connected to the bottom end of the tank assembly 1. The tank assembly 1 includes an outer tank 8 and an inner tank 9, which are arranged internally and externally. A support frame 10 is fixedly connected between the outer tank 8 and the inner tank 9. Auxiliary cooling pipes 11 are simultaneously arranged on both sides of the upper cooling medium pipe 5. An inner cooling pipe 12 and a flow divider 13 are fixedly connected inside the inner tank 9. An auxiliary protrusion 14 is fixedly connected between the outer tank 8 and the inner tank 9.

[0029] In this embodiment of the utility model, two sets of guide pipes 4 are provided, distributed at the same horizontal outer position of the air inlet 2 and the air outlet 3. A guide fan is provided in the guide pipe 4 located in the air inlet 2. The guide pipe 4 is also connected to the outer tank 8 and the inner tank 9. The guide pipe 4 is used to transport external airflow into the space between the inner and outer tanks, thereby reducing the temperature difference between the inside and outside of the device. This effectively ensures that the temperature between the cooling medium pipe and the inner and outer tanks is kept within a reasonable range, preventing the cooling medium pipe and the tank from cracking due to deformation and reducing gas leakage.

[0030] The outer tank 8 is rectangular in the middle and has semi-circular outward protrusions at both ends, while the inner tank 9 is elliptical in shape and also has semi-circular outward protrusions at both ends. The inner tank 9 and the outer tank 8 are fixed together by a support frame 10. The support frame 10 includes multiple sets of "L"-shaped longitudinally arranged frames, which are triangular in shape when viewed from the side. The upper and lower ends of the support frame 10 are fixedly connected to the middle corner of the outer tank 8 and the surface of the inner tank 9, respectively. The inner and outer tanks, through which the inner and outer tanks are arranged, provide a flow channel for the flow guide pipe 4. At the same time, the support frame 10 can effectively ensure the strength and stability of the inner and outer tanks. The "L" shape of the support frame 10 can avoid obstructing the external airflow entering between the inner and outer tanks. Meanwhile, the elliptical inner tank 9 facilitates the drainage of liquid generated during the cooling process.

[0031] The auxiliary cooling pipe 11 and the upper cooling medium pipe 5 are both configured as cooling medium delivery pipes. Their bottom ends are set at an outward bend and are fixedly connected to the top of the inner cooling pipe 12. There are two sets of inner cooling pipes 12 distributed opposite each other, which are fixedly connected to the two ends inside the inner tank 9 in an inclined state. The inner cooling pipes 12 are set in a rectangular frame shape. There are two sets of drain pipes 7 arranged vertically in an "L" shape and connected to the inner tank 9. They are located on both sides of the lower cooling medium pipe 6, and the bottom end of the drain pipes 7 is equipped with a control valve. The auxiliary cooling pipe 11 and the inner cooling pipe 12 achieve the effect of cooling the external maleic anhydride gas entering the inner tank 9, and the drain pipes 7 achieve the effect of discharging the liquid generated during the cooling process.

[0032] The maleic anhydride gas to be treated enters the inner tank 9, where it is cooled by the upper cooling medium pipe 5 and the lower cooling medium pipe 6. At the same time, as the maleic anhydride gas flows in the inner tank 9, the inner cooling pipe 12 located inside assists the upper and lower cooling medium pipes in cooling the maleic anhydride gas, which can effectively ensure the cooling efficiency.

[0033] The auxiliary protrusion 14 is set in a hemispherical shape along the inner wall between the outer tank 8 and the inner tank 9. The auxiliary protrusion 14 is also close to one end of the air inlet 2. The auxiliary protrusion 14 extends the flow time of the external airflow between the inner and outer tanks, ensuring the continuous flow of the external airflow between the inner and outer tanks and reducing energy consumption.

[0034] When this device is in use, external maleic anhydride gas enters the inner tank 9 through the air inlet 2. The upper and lower cooling medium pipes work together with the inner cooling pipe 12 to cool it. The liquid generated during the cooling process flows along the bottom of the inner tank 9 and is concentrated to the drain pipe 7 for outward discharge. Meanwhile, the guide pipe 4 delivers external airflow into the space between the inner and outer tanks to reduce the temperature difference between the inner and outer tanks. Finally, the airflow is discharged outward through the guide pipe 4 at the other end.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A cooler for maleic anhydride, characterized by: The tank assembly (1) includes an air inlet (2) and an air outlet (3) connected to both ends of the tank assembly (1). Both ends of the tank assembly (1) are connected to a flow guide pipe (4). An upper cooling medium pipe (5) and a lower cooling medium pipe (6) are embedded in the upper and lower ends of the tank assembly (1). A drain pipe (7) is fixedly connected to the bottom end of the tank assembly (1). The tank assembly (1) includes an outer tank (8) and an inner tank (9) with inner and outer sides arranged. A support frame (10) is fixedly connected between the outer tank (8) and the inner tank (9). Auxiliary cooling pipes (11) are arranged on both sides of the upper cooling medium pipe (5). An inner cooling pipe (12) and a flow divider (13) are fixedly connected inside the inner tank (9). An auxiliary protrusion (14) is fixedly connected between the outer tank (8) and the inner tank (9).

2. A cooler for maleic anhydride according to claim 1, characterized in that: The guide pipe (4) is provided in two sets, which are distributed at the same horizontal outer position of the air inlet (2) and the air outlet (3). A guide fan is provided in the guide pipe (4) located in the air inlet (2).

3. A cooler for maleic anhydride according to claim 2, characterized in that: The guide pipe (4) is connected to the outer tank (8) between the inner tank (9).

4. A cooler for maleic anhydride according to claim 1, characterized in that: The outer tank (8) is rectangular in the middle and has semi-circular protrusions at both ends, while the inner tank (9) is elliptical in shape and has semi-circular protrusions at both ends. The inner tank (9) and the outer tank (8) are fixed together by a support frame (10).

5. A cooler for maleic anhydride according to claim 1, characterized in that: The support frame (10) includes multiple sets of frames arranged longitudinally in an "L" shape. The overall side view shows a triangular arrangement. The upper and lower ends of the support frame (10) are respectively fixedly connected to the middle corner of the outer tank (8) and the surface of the inner tank (9).

6. A cooler for succinic acid according to claim 1, characterized in that: The auxiliary cooling pipe (11) and the upper cooling medium pipe (5) are both configured as cooling medium delivery pipes, with their bottom ends set at an outward bend and fixedly connected to the top of the inner cooling pipe (12).

7. A cooler for maleic anhydride according to claim 1, characterized in that: The inner cooling pipes (12) are distributed in two sets and are fixedly connected to both ends of the inner tank (9) in an inclined state. The inner cooling pipes (12) are arranged in a rectangular frame shape.

8. A cooler for succinic acid according to claim 1, characterized in that: The drain pipe (7) is arranged vertically in an "L" shape in two sets, which are connected to the inner tank (9). It is located on both sides of the lower cooling medium pipe (6), and a control valve is provided at the bottom of the drain pipe (7).

9. A cooler for succinic acid according to claim 1, characterized in that: The auxiliary protrusion (14) is set in a hemispherical shape along the inner wall between the outer tank (8) and the inner tank (9), and the auxiliary protrusion (14) is also close to one end of the air inlet (2).

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