An energy-saving fixed-bed reactor for preparing maleic anhydride
By designing an energy-saving fixed bed reactor with two reaction shells and partition plates, the continuous replacement of catalysts and continuous reaction of materials is achieved by using motor-driven guide plates and baffles, the problem of feed interruption during catalyst replacement is solved, and the production capacity and production efficiency of maleic anhydride preparation are improved.
Patent Information
- Application Number
- CN202421146340.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-23
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2034-05-23
AI Technical Summary
In the existing maleic anhydride preparation process, the catalyst replacement process requires the supply of raw materials to be stopped, resulting in a decrease in production capacity.
An energy-saving fixed bed reactor is designed. By setting two reaction shells and partition plates in the reactor, the motor-driven guide plate and baffle are used to realize the continuous replacement of catalyst and the continuous reaction of materials, thereby avoiding the interruption of feed during catalyst replacement.
The catalyst replacement does not require stopping feeding, and improves the production capacity and production efficiency of maleic anhydride preparation.
Smart Images
Figure CN222709608U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of chemical equipment, and more specifically to an energy-saving fixed-bed reactor for preparing maleic anhydride. Background Art
[0002] Maleic anhydride is also called maleic anhydride, which is an important organic chemical raw material. At present, the fixed bed process is still the most mature and widely used process in the preparation of maleic anhydride.
[0003] When n-butane is oxidized to prepare maleic anhydride, n-butane needs to be mixed with air and introduced into a fixed bed reactor. Then, under the action of a catalyst, the main reaction generates maleic anhydride. However, after the catalyst has completed the reaction, it is troublesome to replace the catalyst. During the catalyst replacement process, the feed of raw materials must be stopped, thereby reducing the production capacity of maleic anhydride. Utility Model Content
[0004] The technical problem to be solved by the utility model is to provide an energy-saving fixed bed reactor for preparing maleic anhydride which can improve the production capacity.
[0005] The technical solution adopted by the utility model to solve its technical problems is:
[0006] An energy-saving fixed-bed reactor for preparing maleic anhydride, the fixed-bed reactor comprising a shell, a first accommodating chamber and a second accommodating chamber opened in the shell, and a partition plate one separating the first accommodating chamber and the second accommodating chamber, the top of the shell is provided with a guide member, a first reaction shell is installed in the first accommodating chamber, a second reaction shell is installed in the second accommodating chamber, a rotating shaft one is rotatably installed at the top of the partition plate one, the top of the rotating shaft one is connected to a guide plate, one end of the rotating shaft one is connected to a motor one, the bottom end of the partition plate one is provided with a rotating shaft two, one end of the rotating shaft two is connected to a motor two, and a vertically arranged baffle plate one and a sealing plate two, as well as a vertically arranged baffle plate two and a sealing plate one are installed on the rotating shaft two.
[0007] Furthermore, a plurality of first flow holes and a plurality of second flow holes are respectively formed in the first reaction shell and the second reaction shell.
[0008] Furthermore, a plurality of filter holes communicating with the first flow hole and the second flow hole are provided in the first reaction shell and the second reaction shell.
[0009] Furthermore, a reserved opening is installed on the shell, and the reserved opening is a reserved opening 1 and a reserved opening 2 which are arranged at intervals.
[0010] Furthermore, the reserved opening 1 is arranged in communication with the accommodating chamber 1, the reserved opening 2 is arranged in communication with the accommodating chamber 2, and the reserved opening 1 and the reserved opening 2 are separated by the partition plate 1.
[0011] Furthermore, a mounting base 1 is installed on the shell, and the motor 1 is fixedly installed on the mounting base 1.
[0012] Furthermore, a feed port is provided at the top of the guide member, and a guide channel is opened in the guide member.
[0013] Furthermore, a second partition plate is installed in the shell, and the second partition plate is arranged on the same horizontal line as the first partition plate.
[0014] Furthermore, a first discharge port and a second discharge port are provided at the bottom end of the shell, wherein the first discharge port is communicated with the first accommodating chamber, and the second discharge port is communicated with the second accommodating chamber.
[0015] Furthermore, a pair of cavities are arranged at intervals on the shell, and a pair of reserved tubes are arranged at intervals on the outside of the shell.
[0016] The beneficial effects of the utility model are:
[0017] When the catalyst in any reaction shell is used up, the guide of the guide plate can be switched, and the input material can be reacted through the catalyst in another reaction shell. By repeatedly switching operations, the continuous reaction of the material can be achieved, ensuring that the production process will not be interrupted by the addition of catalyst. In this switching process, after switching to another reaction shell, the catalyst can be added to the corresponding reaction shell through reserved port 1 or reserved port 2, ensuring that after the reaction of one reaction shell is complete, the other reaction shell can be switched immediately. Catalysts can be added without stopping the feeding, which improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The utility model is further described below in conjunction with the accompanying drawings and embodiments.
[0019] In the figure:
[0020] Figure 1 This is a front view of the fixed bed reactor in the utility model;
[0021] Figure 2 It is a right side view of the fixed bed reactor in the utility model;
[0022] Figure 3 for Figure 1 A cross-sectional view cut along the AA direction;
[0023] Figure 4 for Figure 2 A cross-sectional view taken along the CC direction;
[0024] Figure 5 for Figure 1 Cross-sectional view taken along direction BB.
[0025] Among them, 10, shell; 11, feed port; 121, discharge port 1; 122, discharge port 2; 131, accommodating chamber 1; 132, accommodating chamber 2; 14, partition plate 1; 15, first reaction shell; 16, first flow hole; 17, second reaction shell; 18, second flow hole; 19, reserved port 1; 20, reserved port 2; 21, guide channel; 22, rotating shaft 1; 23, guide plate; 24, mounting seat 1; 25, motor 1; 26, guide member; 27, cavity; 28, reserved tube; 29, mounting seat 2; 30, motor 2; 31, rotating shaft 2; 32, baffle 1; 33, baffle 2; 34, partition plate 2; 35, sealing plate 1; 36, sealing plate 2. DETAILED DESCRIPTION
[0026] Now the utility model is described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, which only illustrates the basic structure of the utility model in a schematic manner, so it only shows the components related to the utility model.
[0027] Reference Figures 1 to 4 As shown, an energy-saving fixed bed reactor for preparing maleic anhydride, the fixed bed reactor comprises a shell 10, a receiving chamber opened in the shell 10, a guide member 26 is provided at the top of the shell 10, a feed port 11 is provided at the top of the guide member 26, a guide channel 21 is provided in the guide member 26, and a discharge port 121 and a discharge port 2 122 are provided at the bottom of the receiving chamber. In this embodiment, by providing the guide channel 21, the feed port 11 and the receiving chamber are connected by the guide channel 21.
[0028] A partition plate 14 is provided along the axis of the accommodating chamber, and the accommodating chamber is divided into an accommodating chamber 1 131 and an accommodating chamber 2 132 by the partition plate 14. A reaction shell is also installed in the accommodating chamber, and the reaction shell is a first reaction shell 15 and a second reaction shell 17 installed at intervals, and a plurality of first flow holes 16 and a plurality of second flow holes 18 are respectively provided in the first reaction shell 15 and the second reaction shell 17. In this embodiment, through the first flow holes 16 and the second flow holes 18, the catalyst can be stored through the first flow holes 16 and the second flow holes 18, so that the input materials can undergo catalytic reaction. Further, the first reaction shell 15 and the second reaction shell 17 are separated by the partition plate 14, and the first reaction shell 15 is located in the accommodating chamber 1 131, and the second reaction shell 17 is located in the accommodating chamber 2 132, and a plurality of filter holes are provided on the first reaction shell 15 and the second reaction shell 17.
[0029] A reserved opening is also installed on the shell 10, and the reserved opening is a reserved opening 19 and a reserved opening 20 that are arranged at intervals. In this embodiment, the reserved opening 19 and the reserved opening 20 are both arranged in communication with the accommodating chamber, and the reserved opening 19 and the reserved opening 20 are separated by a partition plate 14. Further, the reserved opening 19 is arranged in communication with the accommodating chamber 1 131, and the reserved opening 2 is arranged in communication with the accommodating chamber 2 132.
[0030] A rotating shaft 22 is rotatably installed at the top of the partition plate 14, and a guide plate 23 is connected to the top of the rotating shaft 22. The guide plate 23 is arranged in cooperation with the guide channel 21. Furthermore, a mounting seat 24 is also installed on the shell 10, and a motor 25 is fixedly installed on the mounting seat 24. The output shaft of the motor 25 is connected to the rotating shaft 22. In this embodiment, the motor 25 can be started to drive the rotating shaft 22 connected to the motor 25 to rotate, and the rotating shaft 22 can drive the guide plate 23 connected to the rotating shaft 22 to move, thereby changing the direction of material transportation.
[0031] A second rotating shaft 31 is also provided in the accommodating chamber, and a vertically arranged baffle plate 1 32 and a second sealing plate 36, as well as a vertically arranged baffle plate 2 33 and a first sealing plate 35 are fixedly connected to the second rotating shaft 31. The baffle plates 1 32 and 2 33 are both provided with a plurality of filter holes, and the structures of the baffle plates 1 32 and 2 33 are the same, and the structures of the first sealing plate 35 and the second sealing plate 36 are the same. Further, the first sealing plate 35 is located between the first baffle plate 32 and the second sealing plate 36, and the second sealing plate 36 is located between the second baffle plate 33 and the first sealing plate 35. One end of the second rotating shaft 31 extends out of the housing 10, and a second mounting seat 29 is also installed on the housing 10, and a second motor 30 is installed on the second mounting seat 29, and the output shaft of the second motor 30 is connected to the second rotating shaft 31.
[0032] In this embodiment, a second motor 30 is provided and started, and the second motor 30 is driven by the second motor 30 to rotate the second shaft 31 connected to the second motor 30, and the rotation of the second shaft 31 drives the first baffle 32, the second baffle 33, the first sealing plate 35, and the second sealing plate 36 connected thereto to rotate, and the first baffle 32 and the second baffle 33 respectively seal the first flow hole 16 and the second flow hole 18 on the first reaction shell 15 and the second reaction shell 17, so that after the catalyst is added into the first flow hole 16 and the second flow hole 18, the catalyst can stay between the first flow hole 16 and the second flow hole 18, and a plurality of filter holes are provided on the first baffle 32 and the second baffle 33, and a plurality of filter holes are also provided on the first reaction shell 15 and the second reaction shell 17, so that after the material reacts in the first reaction shell 15 and the second reaction shell 17, it can flow out through the plurality of filter holes provided on the first baffle 32 and the second baffle 33, and the plurality of filter holes provided on the first reaction shell 15 and the second reaction shell 17.
[0033] In the above embodiment, the first flow hole 16 and the second flow hole 18 are staggered with the filter holes on the baffle 1 32 and the baffle 2 33 , and the first flow hole 16 and the second flow hole 18 are connected with the filter holes on the first reaction shell 15 and the second reaction shell 17 .
[0034] A partition plate 2 34 is also installed in the accommodating chamber, and the partition plate 2 34 is arranged on the same horizontal line as the partition plate 1 14. In this embodiment, the top end of the partition plate 2 34 is matched with the bottom end of the sealing plate 1 35, and the bottom end of the partition plate 2 34 is connected to the inner wall of the bottom end of the shell 10, and the accommodating chamber 1 131 and the accommodating chamber 2 132 are separated by the partition plate 1 14, the sealing plate 1 35 or the sealing plate 2 36, and the partition plate 2 34.
[0035] The bottom end of the shell 10 is also provided with a discharge port 121 and a discharge port 2 122. The discharge port 121 is connected to the accommodating chamber 131, and the discharge port 2 122 is connected to the accommodating chamber 2 132. The shell 10 is also provided with a pair of cavities 27 arranged at intervals. A pair of reserved tubes 28 are arranged at intervals outside the shell 10. The pair of reserved tubes 28 and the pair of cavities 27 are separated by a partition plate 14, and any reserved tube 28 is connected to any cavity 27, and another reserved tube 28 is connected to another cavity 27.
[0036] In this embodiment, by setting up a pair of cavities 27, condensed water can be added into the pair of cavities 27 through a pair of reserved tubes 28, and the condensed water is used to cool the shell 10, thereby indirectly cooling the material in the accommodating chamber, so as to ensure that the temperature in the accommodating chamber reaches a suitable temperature when taking out the catalyst.
[0037] The working principle of this utility model:
[0038] When n-butane is oxidized to prepare maleic anhydride, vanadium phosphorus oxide catalysts are usually used, and vanadium phosphorus oxide catalysts are usually in solid form. They usually exist in the form of powder or granules.
[0039] First, the catalyst is put into the first flow hole 16 and the second flow hole 18 through the reserved port 19 and the reserved port 20. The catalyst is sticky and will be adsorbed on the hole walls of the first flow hole 16 and the second flow hole 18. Then, the motor 25 is started, and the motor 25 drives the rotating shaft 22 connected to the motor 25 to rotate. The rotation of the rotating shaft 22 drives the guide plate 23 connected to the rotating shaft 22 to move, so as to change the direction of material transportation. The guide plate 23 is moved to any direction, and the material is put in through the feed port 11. In this process, the material flows to the guide channel 21 through the feed port 11, and then moves to the corresponding reaction shell after being guided by the guide channel 21. The catalyst in the reaction shell reacts with the material. After the reaction is completed, it is transported to the next processing node through the discharge port 121 or the discharge port 2 122.
[0040] In the specific implementation process, when the material is guided into the accommodating chamber 131 for reaction through the guide plate 23, the motor 2 30 is started, and the motor 2 30 drives the rotating shaft 2 31 connected to the motor 2 30 to rotate, and the rotating shaft 2 31 drives the baffle 1 32, baffle 2 33, sealing plate 1 35, and sealing plate 2 36 connected thereto to rotate, and the baffle 1 32 is moved to the bottom end of the first reaction shell 15, and the first flow hole 16 is sealed by the baffle 1 32, and the sealing plate 2 36 is moved to the same horizontal line as the partition plate 14 and the partition plate 2 34, and the partition plate 1 14, the partition plate 2 34, and the sealing plate 2 36 separate the accommodating chamber 131 and the accommodating chamber 2 132. After the catalyst and the material have reacted, combined with the external negative pressure adsorption device, the reacted material flows out through the multiple filter holes opened on the baffle 1 32 and the multiple filter holes opened on the first reaction shell 15, and then is discharged through the discharge port 121.
[0041] When the material is guided into the second accommodating chamber 132 by the guide plate 23 for reaction, the second motor 30 is started, and the second motor 30 drives the second shaft 31 connected to the second motor 30 to rotate, and the second shaft 31 rotates to drive the baffle 1 32, the second baffle 33, the sealing plate 1 35, and the second sealing plate 36 connected thereto to rotate, and the baffle 2 33 is moved to the bottom end of the second reaction shell 17, and the second flow hole 18 is sealed by the baffle 2 33, and the sealing plate 1 35 is moved to the same horizontal line as the partition plate 14 and the partition plate 2 34, and the partition plate 1 14, the partition plate 2 34, and the sealing plate 1 35 separate the accommodating chamber 132. The first chamber 131 and the second chamber 132 are provided. After the catalyst reacts with the material, the reacted material flows out through the plurality of filter holes provided on the second baffle plate 33 and the plurality of filter holes provided on the second reaction shell 17, and then is discharged through the second discharge port 122. During this process, the second shaft 31 rotates to drive the baffle plate 1 32, the baffle plate 2 33, the sealing plate 1 35, and the sealing plate 2 36 connected thereto to rotate, and also drives the baffle plate 1 32 away from the first reaction shell 15. At this time, the catalyst in the first flow hole 16 that has reacted can be discharged from the shell 10 through the discharge port 121, and vice versa.
[0042] When the catalyst reaction of the material in the reaction shell is complete, the motor 25 is started, and the motor 25 drives the rotating shaft 22 connected to the motor 25 to rotate, and the rotating shaft 22 drives the guide plate 23 connected to the rotating shaft 22 to move, so as to change the direction of material transportation, and move the guide plate 23 to another direction. At this time, after the material is put into the feed port 11, the material flows to the guide channel 21 through the feed port 11, and then moves to the corresponding reaction shell after being guided by the guide channel 21. The catalyst in the reaction shell reacts with the material, and after the reaction is completed, it is transported to the next processing node through the discharge port 121 or the discharge port 2 122.
[0043] When the catalyst in any reaction shell is used up, the guide of the guide plate 23 can be switched, and the input material can be reacted through the catalyst in another reaction shell. By repeatedly switching operations, the continuous reaction of the material can be achieved, ensuring that the production process will not be interrupted by adding catalyst. In this switching process, after switching to another reaction shell, the catalyst can be added to the corresponding reaction shell through the reserved port 19 or the reserved port 20, ensuring that after the reaction of one reaction shell is complete, the other reaction shell can be switched immediately.
[0044] Beneficial effects of the utility model:
[0045] When the catalyst in any reaction shell is used up, the guide of the guide plate 23 can be switched, and the input material can be reacted through the catalyst in another reaction shell. By repeatedly switching the operation, the continuous reaction of the material can be achieved, ensuring that the production process will not be interrupted by the addition of catalyst. In this switching process, after switching to another reaction shell, the catalyst can be added to the corresponding reaction shell through the reserved port 19 or the reserved port 20, ensuring that after the reaction of one reaction shell is complete, the other reaction shell can be switched immediately. The catalyst can be added without stopping the feeding, which improves the production efficiency.
[0046] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.
[0047] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.
[0048] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without departing from the scope of the utility model through the above description. The technical scope of this utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.
Claims
1. An energy-saving fixed-bed reactor for preparing maleic anhydride, the fixed-bed reactor comprising a shell, a first accommodating chamber and a second accommodating chamber opened in the shell, and a partition plate 1 separating the first accommodating chamber and the second accommodating chamber, characterized in that: A guide member is provided at the top of the shell, a first reaction shell is installed in the accommodating chamber 1, a second reaction shell is installed in the accommodating chamber 2, a rotating shaft 1 is rotatably installed at the top of the partition plate 1, a guide plate is connected to the top of the rotating shaft 1, a motor 1 is connected to one end of the rotating shaft 1, a rotating shaft 2 is provided at the bottom end of the partition plate 1, a motor 2 is connected to one end of the rotating shaft 2, and a vertically arranged baffle plate 1 and a sealing plate 2, as well as a vertically arranged baffle plate 2 and a sealing plate 1 are installed on the rotating shaft 2.
2. The energy-saving fixed-bed reactor for preparing maleic anhydride according to claim 1, characterized in that: A plurality of first flow holes and a plurality of second flow holes are respectively formed in the first reaction shell and the second reaction shell.
3. The energy-saving fixed-bed reactor for preparing maleic anhydride according to claim 2, characterized in that: The first reaction shell and the second reaction shell are both provided with a plurality of filtering holes which are connected with the first circulation hole and the second circulation hole.
4. The energy-saving fixed-bed reactor for preparing maleic anhydride according to claim 1, characterized in that: The shell body is also provided with reserved openings, which are reserved opening 1 and reserved opening 2 arranged at intervals.
5. The energy-saving fixed-bed reactor for preparing maleic anhydride according to claim 4, characterized in that: The reserved opening 1 is communicated with the accommodating chamber 1, the reserved opening 2 is communicated with the accommodating chamber 2, and the reserved opening 1 and the reserved opening 2 are separated by the partition plate 1.
6. The energy-saving fixed-bed reactor for preparing maleic anhydride according to claim 1, characterized in that: A mounting seat 1 is also installed on the shell, and the motor 1 is fixedly installed on the mounting seat 1.
7. The energy-saving fixed-bed reactor for preparing maleic anhydride according to claim 1, characterized in that: A feed port is arranged at the top of the guide member, and a guide channel is opened in the guide member.
8. The energy-saving fixed-bed reactor for preparing maleic anhydride according to claim 1, characterized in that: A second partition plate is also installed in the shell, and the second partition plate is arranged on the same horizontal line as the first partition plate.
9. The energy-saving fixed-bed reactor for preparing maleic anhydride according to claim 1, characterized in that: The bottom end of the shell is also provided with a first discharge port and a second discharge port. The first discharge port is communicated with the first accommodating chamber, and the second discharge port is communicated with the second accommodating chamber.
10. The energy-saving fixed-bed reactor for preparing maleic anhydride according to claim 1, characterized in that: The shell is also provided with a pair of cavities arranged at intervals, and the outer side of the shell is provided with a pair of reserved tubes arranged at intervals.