Novel annular fixed bed reactor

Abstract

The utility model discloses a novel annular fixed bed reactor and relates to the technical field of reactors. The fixed bed reactor comprises an upper sealing plate, a lower sealing plate, a first heat exchange part and a second heat exchange part, wherein the first heat exchange part and the second heat exchange part are positioned between the upper sealing plate and the lower sealing plate. The first heat exchange part and the second heat exchange part are cylindrical, and the second heat exchange part is sleeved with the first heat exchange part. And a reaction cavity is arranged, the reaction cavity is formed by a gap between the first heat exchange part and the second heat exchange part, and a catalyst is placed in the reaction cavity. The structures of the first heat exchange part and the second heat exchange part are completely independent, so that the mounting and dismounting operations are simplified, the catalyst is convenient to clean, the problem that subsequent reactions are influenced by residual catalysts can be avoided, cross interference among different reactions is prevented, and the stability and safety of the reactions are improved.

Description

Technical Field

[0001] This utility model relates to the field of reactor technology, and in particular to a novel annular fixed-bed reactor. Background Technology

[0002] A fixed-bed reactor is a reactor that is filled with granular catalyst to form a bed of a certain height. Gas or liquid materials flow through the gaps between the particles through the stationary fixed bed, while the reaction process takes place. Currently, fixed-bed reactors at home and abroad are mainly divided into three structural types: tray type, single-tube type, and tubular type. Among them, tray and single-tube types are simple in design, but have a small heat exchange surface area, which cannot meet the needs of most violently exothermic reactions; tubular types can usually meet the heat exchange requirements, but are prone to uneven packing within multiple tubes, and also have strict requirements on the shape of the catalyst. Utility Model Content

[0003] To address the problems of small heat exchange surface area, uneven packing, and limitations on catalyst shape in existing fixed-bed reactors, this invention provides a novel annular fixed-bed reactor.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A novel annular fixed-bed reactor includes an upper sealing plate, a lower sealing plate, a first heat exchange section, and a second heat exchange section, located between the upper and lower sealing plates. Both the first and second heat exchange sections are cylindrical, with the first heat exchange section sleeved over the second heat exchange section. A reaction chamber is provided, formed by the gap between the first and second heat exchange sections, and a catalyst is placed within the reaction chamber.

[0006] Furthermore, the interlayer of the cylindrical shell of the first heat exchange section forms a first heat exchange cavity. A first heat exchange outlet is fixedly connected to the upper part of the first heat exchange section, and a first heat exchange inlet is fixedly connected to the lower part. Both the first heat exchange outlet and the first heat exchange inlet are in communication with the first heat exchange cavity. The interlayer of the cylindrical shell of the second heat exchange section forms a second heat exchange cavity. A second heat exchange outlet is fixedly connected to the upper part of the second heat exchange section, and a second heat exchange inlet is fixedly connected to the lower part. Both the second heat exchange outlet and the second heat exchange inlet are in communication with the second heat exchange cavity.

[0007] Furthermore, both the first heat exchange cavity and the second heat exchange cavity have several baffles.

[0008] Furthermore, a first sealing ring is provided between the first heat exchange section and the upper sealing plate and the lower sealing plate; a second sealing ring and a third sealing ring are provided between the second heat exchange section and the upper sealing plate and the lower sealing plate.

[0009] Furthermore, a first signal leakage hole is provided on the upper sealing plate located between the second sealing ring and the third sealing ring, and the first signal leakage hole is equipped with a first pressure transmitter or a first pressure switch. A second signal leakage hole is provided on the lower sealing plate located between the second sealing ring and the third sealing ring, and the second signal leakage hole is equipped with a second pressure transmitter or a second pressure switch.

[0010] Furthermore, the reaction chamber is equipped with several anti-wall flow internal components.

[0011] Furthermore, a feed trough is provided at the bottom of the upper sealing plate, and the feed trough is connected to two feed ports along two tangential directions. The top of the reaction chamber is adapted to the feed trough, and an inlet distributor is arranged between the top of the reaction chamber and the feed trough.

[0012] Furthermore, the inlet distributor includes a first distribution plate and a second distribution plate, both of which are annular and connected by several fixing plates. The first distribution plate has several first through holes arranged in a circular pattern, and the second distribution plate has several second through holes evenly arranged. The diameter of the first through holes is larger than the diameter of the second through holes.

[0013] Furthermore, a discharge trough is provided at the top of the lower sealing plate, and the discharge trough is connected to a discharge port. The bottom of the reaction chamber is adapted to the discharge trough, and an outlet collector is disposed between the bottom of the reaction chamber and the discharge trough.

[0014] Furthermore, the outlet collector includes a first collecting plate and a second collecting plate, both of which are annular and connected by several fixing plates. The first collecting plate has several evenly arranged third through holes or is provided with a dense mesh.

[0015] The beneficial effects of this invention are as follows: The first heat exchange section and the second heat exchange section are structurally completely independent, which not only simplifies installation and disassembly operations and facilitates catalyst cleaning, but also avoids the problem of catalyst residue affecting subsequent reactions, prevents cross-interference between different reactions, and improves the stability and safety of the reaction. This invention increases the heat exchange specific surface area of ​​the reaction chamber by cooperating with the first heat exchange section and the second heat exchange section, achieving internal and external dual heat exchange, which is beneficial to improving the heat exchange effect. Attached Figure Description

[0016] Figure 1 The diagram shown is a schematic diagram of the structural principle of one embodiment of this utility model.

[0017] Figure 2 As shown Figure 1 Sectional view at point A in the middle.

[0018] Figure 3 As shown Figure 1 A magnified view of a section at point B.

[0019] Figure 4 for Figure 1 The partial structural diagram shows the structure of the first connecting part.

[0020] Figure 5 for Figure 1 The partial structural diagram shows the structure of the second connecting part.

[0021] Figure 6 for Figure 1 The partial structural diagram shows the structure of the upper sealing plate.

[0022] Figure 7 As shown Figure 6 Sectional view at point C.

[0023] Figure 8 The diagram shown is a schematic of the imported distributor.

[0024] Figure 9 The diagram shown is a schematic of the outlet collector. Detailed Implementation

[0025] This utility model discloses a novel annular fixed-bed reactor. The following describes one embodiment of this utility model in detail with reference to the accompanying drawings.

[0026] like Figure 1 As shown, a novel annular fixed-bed reactor includes an upper sealing plate 4, a lower sealing plate 7, a first heat exchange section 1, and a second heat exchange section 2, located between the upper sealing plate 4 and the lower sealing plate 7. Both the first heat exchange section 1 and the second heat exchange section 2 are cylindrical. The interlayer of the cylindrical shell of the first heat exchange section 1 forms a first heat exchange cavity 101. A first heat exchange outlet 102 is fixedly connected to the upper part of the first heat exchange section 1, and a first heat exchange inlet 103 is fixedly connected to the lower part. Both the first heat exchange outlet 102 and the first heat exchange inlet 103 communicate with the first heat exchange cavity 101. The interlayer of the cylindrical shell of the second heat exchange section 2 forms a second heat exchange cavity 201. A second heat exchange outlet 202 is fixedly connected to the upper part of the inner wall of the second heat exchange section 2, and a second heat exchange inlet 203 is fixedly connected to the lower part of the inner wall. Both the second heat exchange outlet 202 and the second heat exchange inlet 203 communicate with the second heat exchange cavity 201. The first heat exchange chamber 101 and the second heat exchange chamber 201 have a number of baffles 3. Each baffle 3 is arranged in a cross pattern along the vertical direction of the first heat exchange chamber 101 and the second heat exchange chamber 201 to prevent short circuit of the heat exchange medium, increase the travel of the heat exchange medium, and improve the heat exchange effect.

[0027] The first heat exchange section 1 is sleeved outside the second heat exchange section 2. A gap exists between the inner wall of the first heat exchange section 1 and the outer wall of the second heat exchange section 2, forming a reaction chamber filled with a catalyst. In this embodiment, the difference between the inner diameter and the outer diameter of the reaction chamber needs to be controlled within 50 mm to significantly increase the heat exchange specific surface area and further improve the heat exchange effect.

[0028] Both the upper sealing plate 4 and the lower sealing plate 7 are annular and have a connecting hole in the middle. The second heat exchange outlet 202 extends to the outside through the connecting hole of the upper sealing plate 4, and the second heat exchange inlet 203 extends to the outside through the connecting hole of the lower sealing plate 7.

[0029] A first sealing ring is provided between the top of the first heat exchange section 1 and the upper sealing plate 4, and a first sealing ring is also provided between the bottom of the first heat exchange section 1 and the lower sealing plate 7. A second sealing ring is provided between the top of the second heat exchange section 2 and the upper sealing plate 4, and a third sealing ring is provided between the side wall and the upper sealing plate 4. A second sealing ring is provided between the bottom of the second heat exchange section 2 and the lower sealing plate 7, and a third sealing ring is provided between the side wall and the lower sealing plate 7. A first signal leakage hole 8 is provided on the upper sealing plate 4, located between the second and third sealing rings on the upper sealing plate 4. The first signal leakage hole 8 is equipped with a first pressure transmitter or a first pressure switch, which realizes the leakage alarm function to detect the sealing performance of the second sealing ring. Even if the second sealing ring is damaged, the third sealing ring can still achieve a seal, avoiding leakage of the liquid in the reaction chamber and ensuring the safety of the reaction. A second signal leakage hole 9 is provided on the lower sealing plate 7. The second signal leakage hole 9 is located between the second sealing ring and the third sealing ring on the lower sealing plate 7. The second signal leakage hole 9 is equipped with a second pressure transmitter or a second pressure switch. The leakage alarm function is realized through the second pressure transmitter or the second pressure switch. It is used to detect the sealing performance of the second sealing ring. Even if the second sealing ring is damaged, the third sealing ring can still achieve sealing, so as to avoid leakage of the liquid in the reaction chamber and ensure the safety of the reaction.

[0030] A feed trough 401 is provided at the bottom of the upper sealing plate 4. The feed trough 401 is connected to two feed ports 402 along two tangential directions. One feed port 402 is located on one side of the upper sealing plate 4, and the other feed port 402 is located on the other side of the upper sealing plate 4. The two feed ports 402 arranged tangentially allow the liquid to enter the reaction chamber more evenly. The top opening of the reaction chamber corresponds to and is adapted to the feed trough 401. An inlet distributor 5 is arranged between the top opening of the reaction chamber and the feed trough 401. The inlet distributor 5 includes a first distribution plate 501 and a second distribution plate 502, both of which are annular. The first distribution plate 501 is located above the second distribution plate 502, and the first distribution plate and the second distribution plate 502 are connected by several fixing plates. Several first through holes are provided on the first distribution plate 501, and the first through holes are arranged in a circular pattern. The second distribution plate 502 has several evenly arranged second through holes, and the diameter of the first through holes is larger than the diameter of the second through holes. The inlet distributor 5 uses several first through holes and several second through holes to make the liquid more evenly sprayed onto the catalyst surface located in the reaction chamber.

[0031] A discharge trough is provided at the top of the lower sealing plate 7, and a discharge port 701 is connected to a discharge port 701 located on the side wall of the lower sealing plate 7. The bottom opening of the reaction chamber corresponds to and is adapted to the discharge trough, and an outlet collector 6 is disposed between the bottom opening of the reaction chamber and the discharge trough. The outlet collector 6 includes a first collecting plate 601 and a second collecting plate 602, both of which are annular. The first collecting plate 601 is located above the second collecting plate 602, and the first collecting plate 601 and the second collecting plate 602 are connected by several fixing plates. The first collecting plate 601 adopts a densely perforated plate or a micron-level dense mesh to support catalysts of different particle diameters, even powdered catalysts, which can effectively improve the applicability range. When the first collecting plate 601 adopts a densely perforated plate, the densely perforated plate has several uniformly arranged third through holes.

[0032] The reaction chamber is equipped with several anti-wall flow internal components 10. Each anti-wall flow internal component 10 is annular and has several discharge holes arranged in a circular pattern, with adjacent discharge holes having the same spacing. The anti-wall flow internal components 10 can prevent the liquid from flowing along the inner wall of the reaction chamber, thus ensuring more thorough contact between the liquid and the catalyst.

[0033] Of course, the above description is not intended to limit the present utility model, and the present utility model is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should also fall within the protection scope of the present utility model.

Claims

1. A novel annular fixed-bed reactor, characterized in that: It includes an upper sealing plate (4), a lower sealing plate (7), a first heat exchange part (1), and a second heat exchange part (2). The first heat exchange part (1) and the second heat exchange part (2) are located between the upper sealing plate (4) and the lower sealing plate (7). The first heat exchange part (1) and the second heat exchange part (2) are both cylindrical, and the first heat exchange part (1) is sleeved outside the second heat exchange part (2). A reaction chamber is provided, which is formed by the gap between the first heat exchange part (1) and the second heat exchange part (2). A catalyst is placed in the reaction chamber.

2. The novel annular fixed-bed reactor according to claim 1, characterized in that: The first heat exchange section (1) has a first heat exchange cavity (101) formed by the interlayer of the cylindrical shell. The upper part of the first heat exchange section (1) is fixedly connected to a first heat exchange outlet (102), and the lower part is fixedly connected to a first heat exchange inlet (103). The first heat exchange outlet (102) and the first heat exchange inlet (103) are both connected to the first heat exchange cavity (101). The second heat exchange section (2) has a second heat exchange cavity (201) formed by the interlayer of the cylindrical shell. The upper part of the second heat exchange section (2) is fixedly connected to a second heat exchange outlet (202), and the lower part is fixedly connected to a second heat exchange inlet (203). The second heat exchange outlet (202) and the second heat exchange inlet (203) are both connected to the second heat exchange cavity (201).

3. A novel annular fixed-bed reactor according to claim 2, characterized in that: Both the first heat exchange chamber (101) and the second heat exchange chamber (201) have several baffles (3).

4. A novel annular fixed-bed reactor according to claim 1, characterized in that: A first sealing ring is provided between the first heat exchange part (1) and the upper sealing plate (4) and the lower sealing plate (7); a second sealing ring and a third sealing ring are provided between the second heat exchange part (2) and the upper sealing plate (4) and the lower sealing plate (7).

5. A novel annular fixed-bed reactor according to claim 4, characterized in that: A first signal leakage hole (8) is provided on the upper sealing plate (4) located between the second sealing ring and the third sealing ring. The first signal leakage hole (8) is equipped with a first pressure transmitter or a first pressure switch. A second signal leakage hole (9) is provided on the lower sealing plate (7) located between the second sealing ring and the third sealing ring. The second signal leakage hole is equipped with a second pressure transmitter or a second pressure switch.

6. A novel annular fixed-bed reactor according to claim 1, characterized in that: The reaction chamber is equipped with several anti-wall flow internal components (10).

7. A novel annular fixed-bed reactor according to claim 1, characterized in that: The bottom of the upper sealing plate (4) is provided with a feeding groove (401), and the feeding groove (401) is connected to two feeding ports (402) along two tangential directions respectively; The top of the reaction chamber is adapted to the feed trough (401), and an inlet distributor (5) is disposed between the top of the reaction chamber and the feed trough (401).

8. A novel annular fixed-bed reactor according to claim 7, characterized in that: The inlet distributor (5) includes a first distribution plate (501) and a second distribution plate (502). Both the first distribution plate (501) and the second distribution plate (502) are annular and connected by several fixing plates. The first distribution plate (501) has a plurality of first through holes arranged in a circular pattern. The second distribution plate (502) has a plurality of second through holes arranged in a uniform pattern. The diameter of the first through holes is larger than the diameter of the second through holes.

9. A novel annular fixed-bed reactor according to claim 1, characterized in that: The top of the lower sealing plate (7) is provided with a discharge groove, and the discharge groove is connected to a discharge port (701); The bottom of the reaction chamber is adapted to the discharge trough, and an outlet collector (6) is disposed between the bottom of the reaction chamber and the discharge trough.

10. A novel annular fixed-bed reactor according to claim 9, characterized in that: The outlet collector (6) includes a first collection plate (601) and a second collection plate (602). Both the first collection plate (601) and the second collection plate (602) are annular and connected by several fixing plates. The first collecting plate (601) has several evenly arranged third through holes or is provided with a dense mesh.

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