Fixed bed reactor for continuous flow efficient catalytic hydrogenation

Abstract

The utility model discloses a fixed bed reactor for continuous flow efficient catalytic hydrogenation, which comprises a reactor main tank body, and an upper partition plate, a plurality of middle partition plates and a lower partition plate are fixed in the reactor main tank body; a plurality of vertical reaction cylinders are inserted into the corresponding through holes of the upper partition plate, the middle partition plate and the lower partition plate, and the outer side walls of the vertical reaction cylinders are welded and fixed on the inner side walls of the corresponding through holes; the upper partition plate is located at the upper part of the reactor main tank body, the lower partition plate is located at the lower part of the reactor main tank body, and the middle partition plate is located at the reactor main tank body between the upper partition plate and the lower partition plate; in the continuous reaction process, heat exchange media with different temperatures or heat exchange media with the same temperature flow in the upper heat exchange cavity, the middle heat exchange cavity and the lower heat exchange cavity, so that the reaction temperature of each stage is controlled, the heat exchange effect is met, and the reaction effect can reach the optimal state.

Description

Technical Field

[0001] This utility model relates to the field of chemical equipment technology, and more specifically to a fixed-bed reactor for continuous flow high-efficiency catalytic hydrogenation. Background Technology

[0002] Current methods use maleic anhydride as a starting material to synthesize γ-butyrolactone through catalytic hydrogenation under the action of a highly efficient bimetallic or multimetallic composite catalyst.

[0003] However, the existing process uses a batch reactor, which is slow, inefficient, and has limited effects.

[0004] Therefore, fixed-bed reactors using continuous flow reactions are now used to achieve continuous reactions. However, existing fixed-bed reactors generally have heat exchange structures at the top or bottom to control the temperature during the reaction. However, this only exchanges heat in a certain area, and the heat exchange effect is limited. It cannot cover the entire reactor as needed, and it cannot independently control the temperature at each stage of the entire reactor, so the effect is limited. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a continuous flow high-efficiency fixed-bed reactor for catalytic hydrogenation. In the continuous reaction process, by flowing heat exchange media of different temperatures or heat exchange media of constant temperature in the upper heat exchange chamber, the middle heat exchange chamber and the lower heat exchange chamber, the reaction temperature at each stage can be controlled to meet the heat exchange effect and enable the reaction effect to reach the optimal state.

[0006] The solution of this utility model to the aforementioned technical problem is:

[0007] A continuous flow high-efficiency catalytic hydrogenation fixed-bed reactor includes a reactor main tank, wherein an upper baffle, multiple middle baffles and a lower baffle are fixed inside the reactor main tank;

[0008] Multiple vertical reaction cylinders are inserted into the corresponding through holes of all the upper, middle and lower partitions, and their outer walls are welded and fixed to the inner walls of the corresponding through holes.

[0009] The upper baffle is located at the top of the reactor main tank, the lower baffle is located at the bottom of the reactor main tank, and the middle baffle is located between the upper and lower baffles in the reactor main tank. The top of the vertical reaction cylinder extends beyond the top surface of the upper baffle, and the bottom of the vertical reaction cylinder is flush with the bottom surface of the lower baffle. A lower baffle is fixed on the bottom surface of the lower baffle at the bottom of the vertical reaction cylinder. A flow passage is formed in the middle of the lower baffle. Multiple catalyst honeycomb blocks with vertically extending honeycomb flow passages are inserted into the vertical reaction cylinder. Two adjacent catalyst honeycomb blocks are aligned vertically and abut against each other. The outer side wall of the catalyst honeycomb block is in close contact with the inner side wall of the vertical reaction cylinder. The bottom surface of the bottom catalyst honeycomb block is pressed against the top surface of the filter screen plate installed at the top surface of the lower baffle. The honeycomb flow passage of the bottom catalyst honeycomb block faces the flow passage.

[0010] The reactor main tank is provided with a horizontal air inlet pipe in the middle. The outer end of the horizontal air inlet pipe extends out of the outer wall of the middle part of the reactor main tank and is fixed to the through hole formed on the side plate of the middle part of the reactor main tank. The top surface of the inner end of the horizontal air inlet pipe is connected to a vertical air inlet pipe, and the top end of the vertical air inlet pipe extends out of the top surface of the upper partition.

[0011] The reactor main tank includes a middle main tank. The top of the middle main tank is fixedly connected to an upper cover by bolts, and the bottom of the middle main tank is fixedly connected to a lower cover by bolts. Sealing rings are clamped between the upper cover, the lower cover and the top and bottom surfaces of the middle main tank.

[0012] An annular groove is formed on the upper inner sidewall of the flow passage of the lower baffle. The edge of the filter screen plate is nested in the annular groove, and its outer sidewall is in close contact with the inner sidewall of the annular groove. The bottom surface of the filter screen plate is pressed against the bottom surface of the annular groove, and its top surface is pressed against the bottom end surface of the vertical reaction cylinder and covers the bottom end surface of the bottom catalyst honeycomb block.

[0013] The reactor main tank is provided with two middle partitions between the upper partition and the lower partition. The upper partition and the upper middle partition form the upper heat exchange chamber, the two middle partitions form the middle heat exchange chamber, and the lower middle partition and the lower partition form the lower heat exchange chamber.

[0014] The upper heat exchange chamber and the lower heat exchange chamber are both formed with guide baffles in the middle. The outer side wall of the guide baffles is welded and fixed to the inner side wall of the reactor main tank. The middle right side of the guide baffles is formed with a first flow passage hole. The upper and lower left side walls of the upper heat exchange chamber and the lower heat exchange chamber are connected to inlet connectors and outlet connectors. The inlet connector is connected to the cavity below the guide baffle, and the outlet connector is connected to the cavity above the guide baffle.

[0015] The intermediate heat exchange chamber is provided with three intermediate partition plates. The side walls of the intermediate partition plates are welded and fixed to the inner side wall of the reactor main tank. Among all the intermediate partition plates, the middle right part of the bottommost intermediate partition plate and the middle right part of the topmost intermediate partition plate are formed with a second through hole. The middle left part of the intermediate partition plate is formed with a second through hole. The upper and lower parts of the left side plate of the intermediate heat exchange chamber are respectively connected to the intermediate outlet connector and the intermediate inlet connector. The intermediate inlet connector communicates with the cavity below the bottommost intermediate partition plate, and the intermediate outlet connector communicates with the cavity above the topmost intermediate partition plate.

[0016] The outstanding effect of this utility model is:

[0017] Compared with existing technologies, it can control the reaction temperature at each stage during a continuous reaction process by flowing heat exchange media of different temperatures or heat exchange media of constant temperature in the upper heat exchange chamber, middle heat exchange chamber and lower heat exchange chamber, thereby satisfying the heat exchange effect and enabling the reaction to reach the optimal state. Attached Figure Description

[0018] Figure 1 This is a partial structural schematic diagram of the present invention;

[0019] Figure 2 yes Figure 1 A magnified view of a portion of the image;

[0020] Figure 3 yes Figure 1 A magnified view of another part. Detailed Implementation

[0021] For example, see below. Figures 1 to 3 As shown, a continuous flow high-efficiency catalytic hydrogenation fixed-bed reactor includes a reactor main tank 10, wherein an upper baffle 11, a plurality of middle baffles 12 and a lower baffle 13 are fixed inside the reactor main tank 10.

[0022] Multiple vertical reaction cylinders 20 are inserted into the corresponding through holes of all the upper partition 11, middle partition 12 and lower partition 13, and their outer side walls are welded and fixed to the inner side walls of the corresponding through holes.

[0023] The upper baffle 11 is located at the upper part of the reactor main tank 10, the lower baffle 13 is located at the lower part of the reactor main tank 10, and the middle baffle 12 is located between the upper baffle 11 and the lower baffle 13 in the reactor main tank 10. The top of the vertical reaction cylinder 20 extends beyond the top surface of the upper baffle 11, and the bottom end of the vertical reaction cylinder 20 is flush with the bottom surface of the lower baffle 13. A lower baffle 14 is fixed on the bottom surface of the lower baffle 13 at the bottom end of the vertical reaction cylinder 20, and a flow channel is formed in the middle of the lower baffle 14. Through hole 141, a number of catalyst honeycomb blocks 1 with vertically extending honeycomb flow through holes are inserted in the vertical reaction cylinder 20. Two adjacent catalyst honeycomb blocks 1 are aligned vertically and abut against each other. The outer side wall of the catalyst honeycomb block 1 is in close contact with the inner side wall of the vertical reaction cylinder 20. The bottom surface of the bottom catalyst honeycomb block 1 is pressed against the top surface of the filter screen plate 15 installed at the top surface of the lower baffle 14. The honeycomb flow through hole of the bottom catalyst honeycomb block 1 faces the flow through hole 141.

[0024] A transverse air inlet pipe 30 is provided in the middle of the main tank 10 of the reactor. The outer end of the transverse air inlet pipe 30 extends out of the outer side wall of the middle part of the main tank 10. The outer side wall of the transverse air inlet pipe 30 at the through hole of the side plate of the main tank 10 is welded and fixed to the inner side wall of the through hole. A vertical air inlet pipe 31 is connected to the top surface of the inner end of the transverse air inlet pipe 30. The top end of the vertical air inlet pipe 31 extends out of the top surface of the upper partition plate 11. A connecting end is formed at the outer end of the transverse air inlet pipe 30.

[0025] Furthermore, the reactor main tank 10 includes a central main tank 101, with an upper cover 102 fixedly connected to the top of the central main tank 101 by bolts, and a lower cover 103 fixedly connected to the bottom of the central main tank 101 by bolts. Sealing rings are clamped between the upper cover 102, the lower cover 103 and the top and bottom surfaces of the central main tank 101.

[0026] Furthermore, an annular groove is formed on the upper inner sidewall of the flow hole 141 of the lower baffle 14. The edge of the filter screen plate 15 is nested in the annular groove, and its outer sidewall is tightly attached to the inner sidewall of the annular groove. The bottom surface of the filter screen plate 15 is pressed against the bottom surface of the annular groove, and its top surface is pressed against the bottom end surface of the vertical reaction cylinder 20 and covers the bottom end surface of the bottom catalyst honeycomb block 1.

[0027] Furthermore, the reactor main tank 10 has two middle partitions 12 between the upper partition 11 and the lower partition 13. The upper partition 11 and the upper middle partition 12 form the upper heat exchange chamber 2, the two middle partitions 12 form the middle heat exchange chamber 3, and the lower middle partition 12 and the lower partition 13 form the lower heat exchange chamber 4.

[0028] Furthermore, guide baffles 5 are formed in the middle of both the upper heat exchange chamber 2 and the lower heat exchange chamber 4. The outer side wall of the guide baffles 5 is welded and fixed to the inner side wall of the reactor main tank 10. A first flow passage hole 51 is formed in the middle of the right side of both the guide baffles 5. An inlet connector 16 and an outlet connector 17 are connected to the upper and lower parts of the left side wall of both the upper heat exchange chamber 2 and the lower heat exchange chamber 4. The inlet connector 16 is connected to the cavity below the guide baffles 5, and the outlet connector 17 is connected to the cavity above the guide baffles 5.

[0029] The intermediate heat exchange chamber 3 is provided with three intermediate partition plates 6. The side walls of the intermediate partition plates 6 are welded and fixed to the inner side wall of the reactor main tank 10. Among all the intermediate partition plates 6, the middle right part of the lowermost intermediate partition plate 6 and the middle right part of the uppermost intermediate partition plate 6 are formed with second through holes 61. The middle left part of the intermediate partition plate 6 is formed with a second through hole 61. The upper and lower parts of the left side plate of the intermediate heat exchange chamber 3 are respectively connected to the intermediate outlet connector 7 and the intermediate inlet connector 8. The intermediate inlet connector 8 communicates with the cavity below the lowermost intermediate partition plate 6, and the intermediate outlet connector 7 communicates with the cavity above the uppermost intermediate partition plate 6.

[0030] Furthermore, the top plate of the upper cover 102 is connected to a feed connector 104 in the middle, and the bottom plate of the lower cover 103 is connected to a discharge connector 105 in the middle.

[0031] The vertical air intake pipe 31 is inserted into the corresponding connecting through holes on the intermediate partition plate 6, guide partition plate 5, upper partition plate 11 and middle partition plate 12. Its outer side wall is welded and fixed to the inner side wall of the corresponding connecting through hole. The top end of the vertical air intake pipe 31 extends out of the upper partition plate 11 and is fixed with an upper horizontal air outlet connecting block 32. The upper horizontal air outlet connecting block 32 has an inner cavity formed inside. The top end of the vertical air intake pipe 31 communicates with the inner cavity. Multiple lower air outlet connecting holes 33 are fixed on the bottom side of the upper horizontal air outlet connecting block 32. The lower air outlet connecting holes 33 communicate with the inner cavity.

[0032] An annular support plate 34 is fixed on the outer wall of the upper part of the vertical air intake pipe 31. A cover plate 35 is inserted into the vertical air intake pipe 31 above the annular support plate 34. An upper sleeve part 351 is formed in the middle of the bottom surface of the cover plate 35, and a lower sleeve part 341 is formed in the middle of the top surface of the annular support plate 34. The upper sleeve part 351 is inserted into the lower sleeve part 341. A compression spring 36 is inserted into the upper sleeve part 351 and the lower sleeve part 341. The top end of the compression spring 36 is applied to the bottom surface of the cover plate 35, and the bottom end is applied to the top surface of the annular support plate 34. The cover plate 35 covers all the lower air outlet connection holes 33.

[0033] In this embodiment, the catalyst honeycomb block 1 can be a bimetallic or multimetallic composite support catalyst such as Cu-based, Cu-Zn-based, Ni-based, Pd-based, or Ru-based catalysts.

[0034] In this embodiment, the maleic anhydride solution is introduced into the main tank 10 of the reactor through the feed connector 104. At the same time, pressurized hydrogen gas is introduced into the outer end of the horizontal air inlet pipe 30, so that the hydrogen gas and maleic anhydride solution enter all the vertical reaction cylinders 20. Through the catalytic effect of the internal catalyst honeycomb block 1, the reaction is carried out and becomes γ-butyrolactone liquid, which finally flows out from the discharge connector 105. Since the catalyst honeycomb block 1 has honeycomb-shaped vertical through holes, microchannels are formed when the reaction liquid flows, thereby increasing the reaction contact area and improving the reaction effect and efficiency.

[0035] During the reaction, liquids at corresponding temperatures can be introduced into the inlet connectors 16 of the upper heat exchange chamber 2 and the lower heat exchange chamber 4, and flow out from the corresponding outlet connectors 17.

[0036] Similarly, liquid of the corresponding temperature can be introduced into the intermediate inlet connector 8 at the intermediate heat exchange chamber 3 and flow out from the intermediate outlet connector 7.

[0037] The corresponding liquid can exchange heat with the material in the vertical reaction cylinder 20 in the upper heat exchange chamber 2, lower heat exchange chamber 4, or intermediate heat exchange chamber 3, so that the material in the vertical reaction cylinder 20 in the upper heat exchange chamber 2, lower heat exchange chamber 4, or intermediate heat exchange chamber 3 can exchange heat, such as raising or lowering the temperature here, to ensure the reaction temperature at the location of the vertical reaction cylinder 20, thereby improving the reaction effect and efficiency. It is easy to adjust and control and has good performance.

[0038] In this embodiment, temperature sensors are fixed on the outer walls of the upper heat exchange chamber 2, the lower heat exchange chamber 4, and the middle heat exchange chamber 3. The sensing end of the temperature sensor extends into the upper heat exchange chamber 2, the lower heat exchange chamber 4, or the middle heat exchange chamber 3 to detect the temperature of the flowing liquid inside.

[0039] Finally, it should be noted that the above embodiments are merely representative examples of this utility model. Obviously, this utility model is not limited to the above embodiments and can have many variations. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model should be considered to fall within the protection scope of this utility model.

Claims

1. A continuous flow high-efficiency catalytic hydrogenation fixed-bed reactor, comprising a reactor main tank (10), characterized in that: The reactor main tank (10) is internally fixed with an upper baffle (11), multiple middle baffles (12) and a lower baffle (13). Multiple vertical reaction cylinders (20) are inserted into the corresponding through holes of all the upper partition (11), middle partition (12) and lower partition (13), and their outer side walls are welded and fixed to the inner side walls of the corresponding through holes; The upper baffle (11) is located at the upper part of the reactor main tank (10), the lower baffle (13) is located at the lower part of the reactor main tank (10), and the middle baffle (12) is located at the reactor main tank (10) between the upper baffle (11) and the lower baffle (13). The top of the vertical reaction cylinder (20) extends beyond the top surface of the upper baffle (11), and the bottom end of the vertical reaction cylinder (20) is flush with the bottom surface of the lower baffle (13). A lower baffle (14) is fixed on the bottom surface of the lower baffle (13) at the bottom end of the vertical reaction cylinder (20). The middle part of the lower baffle (14) A catalyst honeycomb block (1) with a flow passage (141) is inserted into a vertical reaction cylinder (20). Two adjacent catalyst honeycomb blocks (1) are aligned and close to each other. The outer side wall of the catalyst honeycomb block (1) is close to the inner side wall of the vertical reaction cylinder (20). The bottom surface of the bottom catalyst honeycomb block (1) is pressed against the top surface of the filter screen plate (15) installed at the top surface of the lower baffle (14). The honeycomb flow passage of the bottom catalyst honeycomb block (1) faces the flow passage (141). The reactor main tank (10) is provided with a horizontal air inlet pipe (30) in the middle. The outer end of the horizontal air inlet pipe (30) extends out of the middle outer wall of the reactor main tank (10). The top surface of the inner end of the horizontal air inlet pipe (30) is connected to a vertical air inlet pipe (31). The top end of the vertical air inlet pipe (31) extends out of the top surface of the upper partition (11).

2. The continuous flow high-efficiency catalytic hydrogenation fixed-bed reactor according to claim 1, characterized in that: The reactor main tank (10) includes a middle main tank (101), the top of the middle main tank (101) is fixedly connected to an upper cover (102) by bolts, and the bottom of the middle main tank (101) is fixedly connected to a lower cover (103) by bolts.

3. The fixed-bed reactor for continuous flow high-efficiency catalytic hydrogenation according to claim 1, characterized in that: The reactor main tank (10) has two middle partitions (12) between the upper partition (11) and the lower partition (13). The upper partition (11) and the upper middle partition (12) form the upper heat exchange chamber (2), the two middle partitions (12) form the middle heat exchange chamber (3), and the lower middle partition (12) and the lower partition (13) form the lower heat exchange chamber (4).

4. A continuous flow high-efficiency catalytic hydrogenation fixed-bed reactor according to claim 3, characterized in that: The upper heat exchange chamber (2) and the lower heat exchange chamber (4) are both formed with guide baffles (5) in the middle. The outer side wall of the guide baffles (5) is welded and fixed to the inner side wall of the reactor main tank (10). The middle right side of the guide baffles (5) is formed with a first flow through hole (51). The upper and lower left side walls of the upper heat exchange chamber (2) and the lower heat exchange chamber (4) are connected to an inlet connector (16) and an outlet connector (17). The inlet connector (16) is connected to the cavity below the guide baffles (5), and the outlet connector (17) is connected to the cavity above the guide baffles (5). The intermediate heat exchange chamber (3) is provided with three intermediate partition plates (6). The side walls of the intermediate partition plates (6) are welded and fixed to the inner side wall of the reactor main tank (10). Among all the intermediate partition plates (6), the middle right part of the lowermost intermediate partition plate (6) and the middle right part of the uppermost intermediate partition plate (6) are formed with second through holes (61). The middle left part of the intermediate partition plate (6) is formed with a second through hole (61). The upper and lower parts of the left side plate of the intermediate heat exchange chamber (3) are respectively connected to the intermediate outlet connector (7) and the intermediate inlet connector (8). The intermediate inlet connector (8) is connected to the cavity below the lowermost intermediate partition plate (6), and the intermediate outlet connector (7) is connected to the cavity above the uppermost intermediate partition plate (6).

5. A continuous flow high-efficiency catalytic hydrogenation fixed-bed reactor according to claim 2, characterized in that: The upper cover (102) has a feed connector (104) in the middle of its top plate, and the lower cover (103) has a discharge connector (105) in the middle of its bottom plate.

6. A continuous flow high-efficiency catalytic hydrogenation fixed-bed reactor according to claim 4, characterized in that: The vertical air inlet pipe (31) is inserted into the corresponding connecting through holes on the corresponding intermediate partition plate (6), guide partition plate (5), upper partition plate (11) and middle partition plate (12). Its outer side wall is welded and fixed to the inner side wall of the corresponding connecting through hole. The top end of the vertical air inlet pipe (31) extends out of the upper partition plate (11) and is fixed with an upper horizontal air outlet connecting block (32). The upper horizontal air outlet connecting block (32) has an inner cavity formed inside. The top end of the vertical air inlet pipe (31) communicates with the inner cavity. The bottom side of the upper horizontal air outlet connecting block (32) is fixed with multiple lower air outlet connecting holes (33). The lower air outlet connecting holes (33) communicate with the inner cavity.

7. A continuous flow high-efficiency catalytic hydrogenation fixed-bed reactor according to claim 6, characterized in that: An annular support plate (34) is fixed on the outer wall of the upper part of the vertical air intake pipe (31). A cover plate (35) is inserted on the vertical air intake pipe (31) above the annular support plate (34). An upper sleeve part (351) is formed in the middle of the bottom surface of the cover plate (35), and a lower sleeve part (341) is formed in the middle of the top surface of the annular support plate (34). The upper sleeve part (351) is inserted in the lower sleeve part (341). A compression spring (36) is inserted on the upper sleeve part (351) and the lower sleeve part (341). The top end of the compression spring (36) is applied to the bottom surface of the cover plate (35), and the bottom end is applied to the top surface of the annular support plate (34). The cover plate (35) covers all the lower air outlet connection holes (33).

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