Micro-channel reactor

Abstract

The utility model relates to the technical field of chemical equipment, and provides a micro-channel reactor, which is characterized in that a reaction pipeline is designed into a structure that a plurality of pipeline units are sequentially communicated, and each pipeline unit is formed by a plurality of pipeline sections which are distributed in a snakelike manner, so that the reaction path in the reaction pipeline can be prolonged, and the reaction effect among different phases can be improved. Meanwhile, when the reaction pipeline is mounted, each support plate can be correspondingly clamped into a gap between the two adjacent pipeline sections, and the first clamping grooves in the support plates are clamped on the outer surfaces of the corresponding pipeline sections, so that the two adjacent pipeline sections are effectively supported; the vertical vibration caused by external impact between the pipeline sections can be effectively relieved, and the structural stability of the reaction pipeline is ensured. Therefore, the micro-channel reactor disclosed by the utility model is convenient to disassemble and assemble; the reaction pipeline is stably supported, so that the stability of the structure is favorably improved; and stable reaction among different phases is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of chemical equipment, and in particular relates to a microchannel reactor. Background Art

[0002] A microchannel reactor refers to a device that provides a reaction channel with a smaller flow cross-sectional area for reactions between different phases and provides heat for reactions between different phases. It can be divided into plate microchannel reactors and tubular microchannel reactors.

[0003] In a tubular microchannel reactor, a shell and an S-shaped curved reaction pipe are usually included. For example, a gas-liquid-solid three-phase flow tubular spiral microchannel reactor is disclosed in the existing literature (application number CN202222538201.X), and the spiral microchannel is fixed in the microchannel reactor body. However, during the reaction process, the outside of the spiral microchannel will be impacted by the heat exchange medium, and the inside will be affected by the high-speed flow of the fluid, causing the spiral microchannel structure itself to vibrate more or less, which not only affects the stability of the structure, but also affects the reaction between different phases. Utility Model Content

[0004] Based on the above background, the purpose of the utility model is to provide a microchannel reactor, which is not only convenient for disassembly and assembly, but also provides stable support for the reaction pipeline, which is beneficial to improving the stability of the structure and ensuring stable reaction between different phases.

[0005] In order to achieve the above objectives, the utility model adopts the following technical solutions:

[0006] A microchannel reactor comprises: a heat exchange shell; a reaction pipeline, which is arranged in the heat exchange shell and forms a heat exchange channel with the heat exchange shell, the reaction pipeline comprises a plurality of pipeline units which are connected in sequence and arranged in parallel, each of the pipeline units comprises a plurality of pipeline sections which are serpentinely distributed along the height direction, each of the pipeline sections is connected in sequence end to end, and a gap is formed between two adjacent pipeline sections; a support structure which is detachably arranged in the heat exchange shell, and the support structure comprises a connecting piece, two support plates and a plurality of supporting plates located between the two support plates, the supporting plates are located in the gap, and first card grooves are provided on opposite sides of the supporting plates, the first card grooves are used to clip into the pipeline section on one side, the two support plates are respectively located at the two ends of the pipeline unit in the height direction, and a second card groove for clipping into the pipeline section is provided on the side of each support plate facing the pipeline unit, and the connecting piece is used to detachably connect each of the support plates with each of the supporting plates.

[0007] Furthermore, the heat exchange shell includes an outer shell and a cover body covering the open end of the outer shell, the inner wall of the outer shell is provided with a limit block, and the cover body is provided with a push rod. When the cover body is covered on the outer shell, the push rod can push the support plate to make the support plate abut against the limit block.

[0008] Furthermore, the support structure further comprises an elastic member, wherein the elastic member is arranged on a side of the support plate facing away from the cover body, and the elastic member is used for elastically abutting between the limit block and the support plate.

[0009] Furthermore, the support plate is provided with a first through hole along the thickness direction thereof, and the support plate is provided with a second through hole along the thickness direction thereof.

[0010] Furthermore, a flow groove is provided on a side of each support plate away from the second clamping groove, and support protrusions are formed on both sides of the flow groove, and the support protrusions are used to contact the inner wall of the heat exchange shell.

[0011] Furthermore, a plurality of flow-blocking protrusions are provided on the groove wall of the flow-passing groove, and the flow-blocking protrusions are distributed at intervals along the width direction of the supporting structure.

[0012] Furthermore, the microchannel reactor also includes an input pipe and an output pipe, and the support structure divides the heat exchange channel into a first split cavity and a second split cavity that are interconnected along the length direction of the heat exchange shell, the input pipe is connected to the first split cavity, and the output pipe is connected to the second split cavity.

[0013] Furthermore, the reaction pipeline also includes a liquid inlet pipe and an air inlet pipe, and the air inlet pipe and the liquid inlet pipe are both connected to the first pipeline unit.

[0014] Furthermore, the reaction pipeline also includes a mixing chamber, the air inlet pipe and the liquid inlet pipe are both connected to the mixing chamber, the mixing chamber is connected to the first pipeline unit, and the cross-sectional area of ​​at least part of the mixing chamber is larger than the cross-sectional area of ​​the pipeline unit.

[0015] The utility model has the following beneficial effects:

[0016] (1) The reaction pipeline is designed as a structure in which multiple pipeline units are connected in sequence, and each pipeline unit is composed of multiple pipeline segments distributed in a serpentine manner, so that the reaction path in the reaction pipeline can be extended, which is conducive to improving the reaction effect between different phases. At the same time, when the reaction pipeline is installed, each support plate can be respectively inserted into the gap between two adjacent pipeline segments, and the first card slot on the support plate is respectively clamped on the outer surface of the corresponding pipeline segment, so that the two adjacent pipeline segments are effectively supported, which can effectively alleviate the up and down vibration caused by the external impact between the pipeline segments, and ensure the structural stability of the reaction pipeline. Then, the second card slots of the two support plates are respectively clamped at the upper and lower ends of the pipeline unit; then, each support plate and the support plate are connected as a whole through a connector; after the connection, the reaction pipeline and the support structure are loaded into the heat exchange shell together, and the support structure is disassembled and connected to the heat exchange shell to complete the support and installation of the reaction pipeline. It can be seen that the microchannel reactor of the present application is not only convenient for disassembly and assembly; but also plays a stable supporting role for the reaction pipeline, which is conducive to improving the stability of the structure; and ensures stable reaction between different phases.

[0017] (2) A limit block is provided on the inner wall of the shell, and a push rod is provided on the cover body. When the reaction pipe and the support structure are installed in the shell together, it is only necessary to cover the open end of the shell with the cover body, so that the push rod can push the support structure to abut against the limit block, so as to realize rapid fixation of the support structure in the heat exchange shell, which is beneficial to improving assembly efficiency.

[0018] (3) An elastic member is arranged on the side of the support plate facing away from the cover body to ensure elastic contact between the support plate and the limit block, thereby preventing the structure from being easily damaged due to rigid abutment between the two. At the same time, the elastic member is arranged to help reduce the processing accuracy requirements for the length of the push rod.

[0019] (4) A mixing chamber is provided at the downstream end of the air inlet pipe and the liquid inlet pipe so that the incoming gas and liquid can be fully mixed in the mixing chamber, thereby improving the mixing uniformity between different phases and facilitating the reaction rate between different phases. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0021] Figure 1 This is a schematic diagram of the structure of a microchannel reactor described in one embodiment of the present application;

[0022] Figure 2A structural cross-sectional view of a microchannel reactor described in one embodiment of the present application;

[0023] Figure 3 for Figure 2 A magnified view of the structure at the center circle A;

[0024] Figure 4 This is a schematic diagram of the coordination between the reaction pipeline and the support structure described in one embodiment of the present application;

[0025] Figure 5 This is a schematic diagram of a support structure described in one embodiment of the present application;

[0026] Figure 6 This is a schematic diagram of the structure of a housing described in one embodiment of the present application;

[0027] Figure 7 It is a schematic structural diagram of a cover body described in one embodiment of the present application.

[0028] Description of Figure Numbers:

[0029] 100, microchannel reactor; 10, heat exchange shell; 11, outer shell; 111, annular groove; 12, cover; 121, annular clamping edge; 122, push rod; 13, heat exchange channel; 131, first sub-cavity; 132, second sub-cavity; 14, limit block; 141, second fixed column; 20, reaction pipeline; 21, pipeline unit; 211, pipeline section; 22, air inlet pipe; 23, liquid inlet pipe; 24, mixing chamber; 25, gap; 30, supporting structure; 31, connecting piece; 32, supporting plate; 321, first clamping groove; 322, first through hole; 33, supporting plate; 331, second clamping groove; 332, second through hole; 333, flow groove; 334, supporting protrusion; 335, flow blocking protrusion; 34, elastic member; 341, first fixed column; 40, input pipe; 41, output pipe.

[0030] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0033] In addition, in the present utility model, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0034] In one embodiment, please refer to Figures 1 to 7 A microchannel reactor 100 comprises: a heat exchange shell 10; a reaction pipe 20, which is arranged in the heat exchange shell 10 and forms a heat exchange channel 13 with the heat exchange shell 10, the reaction pipe 20 comprises a plurality of pipe units 21 which are connected in sequence and arranged in parallel, each of the pipe units 21 comprises a plurality of pipe sections 211 which are serpentinely distributed along the height direction, each of the pipe sections 211 is connected end to end in sequence, and a gap 25 is formed between two adjacent pipe sections 211; a support structure 30 which is detachably arranged in the heat exchange shell 10, and the support structure 30 comprises a connector 3 1. Two support plates 33 and a plurality of support plates 32 located between the two support plates 33. The support plates 32 are located in the gap 25, and first card slots 321 are provided on opposite sides of the support plates 32. The first card slots 321 are used to snap into the pipe section 211 on one side. The two support plates 33 are respectively located at both ends of the pipe unit 21 in the height direction. A second card slot 331 for snapping into the pipe section 211 is provided on one side of each support plate 33 facing the pipe unit 21. The connector 31 is used to detachably connect each support plate 33 with each support plate 32.

[0035] The above-mentioned microchannel reactor 100 designs the reaction pipeline 20 as a structure in which multiple pipeline units 21 are connected in sequence, and each pipeline unit 21 is composed of multiple pipeline segments 211 distributed in a serpentine shape, so that the reaction path in the reaction pipeline 20 can be extended, which is conducive to improving the reaction effect between different phases. At the same time, when the reaction pipeline 20 is installed, each support plate 32 can be respectively inserted into the gap 25 between two adjacent pipeline segments 211, and the first card groove 321 on the support plate 32 is respectively inserted into the outer surface of the corresponding pipeline segment 211, so that the two adjacent pipeline segments 211 are effectively supported, which can effectively alleviate the up and down vibrations caused by external impacts between the pipeline segments 211, and ensure the structural stability of the reaction pipeline 20. Next, the second slots 331 of the two support plates 33 are respectively clamped at the upper and lower ends of the pipeline unit 21; then, each support plate 33 and the support plate 32 are connected as a whole through the connector 31; after the connection, the reaction pipeline 20 and the support structure 30 are loaded into the heat exchange shell 10 together, and the support structure 30 is disassembled and connected with the heat exchange shell 10 to complete the support and installation of the reaction pipeline 20. It can be seen that the microchannel reactor 100 of the present application is not only convenient for disassembly and assembly, but also plays a stable supporting role for the reaction pipeline 20, which is conducive to improving the stability of the structure and ensuring stable reaction between different phases.

[0036] It should be explained that the pipeline unit 21 is a serpentine pipeline structure, which is composed of a plurality of parallel and spaced pipeline segments 211. The length direction of the pipeline segment 211 and the height direction of the pipeline unit 21 are arranged perpendicular to each other. The gaps 25 between each pipeline unit 21 should be in a horizontal position, so that it is convenient for the support plate 32 to penetrate into the gaps 25 in multiple pipeline units 21 at the same time. The number of the first slots 321 on one side of the support plate 32 is consistent with the number of pipeline units 21. Similarly, the number of the second slots 331 on one side of the support plate 33 should also be consistent with the number of pipeline units 21.

[0037] Specifically, the first slot 321 and the second slot 331 are both semicircular structures, and the first slot 321 between the upper and lower supporting plates 32 can form a complete circular structure so as to completely fit on the surface of the pipe section 211. At the same time, the second slot 331 of the support plate 33 and the first slot 321 of one of the supporting plates 32 can also form a complete circular structure.

[0038] Optionally, there are multiple ways to connect the connector 31 to the support plate 32 and the support plate 33, such as bolt connection, clamping connection, pin connection, etc. Specifically, the connection between the connector 31 and the support plate 32 and the support plate 33 is bolt connection. At the same time, in order to improve the stability of the support structure 30, there are two connectors 31, which are respectively located on both sides of the reaction pipe 20 and are connected to each support plate 32 and each support plate 33.

[0039] For further information, please refer to Figure 3 , Figure 6 and Figure 7 The heat exchange shell 10 includes a shell 11 and a cover 12 covering the open end of the shell 11. A stop block 14 is provided on the inner wall of the shell 11, and a push rod 122 is provided on the cover 12. When the cover 12 is covered on the shell 11, the push rod 122 can push the support plate 33 so that the support plate 33 abuts against the stop block 14. It can be seen that the stop block 14 is provided on the inner wall of the shell 11, and the push rod 122 is provided on the cover 12. In this way, when the reaction pipe 20 and the support structure 30 are installed in the shell 11 together, it is only necessary to cover the open end of the shell 11 with the cover 12, so that the push rod 122 can push the support structure 30 to abut against the stop block 14, so as to achieve rapid fixation of the support structure 30 in the heat exchange shell 10, which is conducive to improving assembly efficiency.

[0040] In order to facilitate the tight combination between the cover body 12 and the shell 11 , an annular groove 111 may be provided on the open end of the shell 11 , and an annular clamping edge 121 is provided on the cover body 12 , and the annular clamping edge 121 is clamped into the annular groove 111 .

[0041] For further information, please refer to Figure 3 and Figure 5 The support structure 30 further includes an elastic member 34, which is disposed on the side of the support plate 33 facing away from the cover body 12, and is used to elastically abut between the stop block 14 and the support plate 33. It can be seen that the elastic member 34 is disposed on the side of the support plate 33 facing away from the cover body 12, which can ensure elastic contact between the support plate 33 and the stop block 14, and avoid the structural damage caused by the rigid abutment between the two; at the same time, the elastic member 34 is disposed, which can help reduce the processing accuracy requirements for the length of the push rod 122.

[0042] Optionally, the elastic member 34 may be a spring, elastic rubber or the like.

[0043] Specifically, the elastic member 34 is a spring, a first fixing column 341 is provided on the support plate 33, a second fixing column 141 is provided on the limit block 14, one end of the spring is sleeved on the first fixing column 341, and when the support plate 33 moves closer to the limit block 14, the other end of the spring can be sleeved on the second fixing column 141.

[0044] In one embodiment, please refer to Figure 5 The support plate 32 is provided with a first through hole 322 along its thickness direction, and the support plate 33 is provided with a second through hole 332 along its thickness direction. It can be seen that the first through hole 322 and the second through hole 332 facilitate the smooth flow of the heat exchange medium in the heat exchange channel 13, thereby improving the heat exchange efficiency.

[0045] In one embodiment, please refer to Figure 5, a flow groove 333 is provided on one side of each support plate 33 away from the second slot 331, and support protrusions 334 are formed on both sides of the flow groove 333, and the support protrusions 334 are used to contact the inner wall of the heat exchange shell 10. It can be seen that the support plate 33 and the heat exchange shell 10 are stably combined through the support protrusions 334, thereby improving the stability of the structure; at the same time, the flow groove 333 can further improve the flowability of the heat exchange medium.

[0046] For further information, please refer to Figure 5 A plurality of flow-blocking protrusions 335 are provided on the groove wall of the flow groove 333, and each flow-blocking protrusion 335 is spaced apart along the width direction of the support structure 30. It can be seen that when the heat exchange medium passes through the flow groove 333, it will be partially blocked by the flow-blocking protrusions 335, so that a flow velocity difference is generated between the heat exchange media, which is convenient for forming a backflow, prolonging the heat exchange time, and improving the heat exchange effect.

[0047] The flow-blocking protrusion 335 may be designed as a part of a cylinder, and the cylindrical surface of the flow-blocking protrusion 335 faces the interior of the flow groove 333 .

[0048] In one embodiment, please refer to Figure 2 The microchannel reactor 100 further includes an input pipe 40 and an output pipe 41. The support structure 30 divides the heat exchange channel 13 into a first split cavity 131 and a second split cavity 132 that are interconnected along the length direction of the heat exchange shell 10. The input pipe 40 is in communication with the first split cavity 131, and the output pipe 41 is in communication with the second split cavity 132. It can be seen that the input pipe 40 and the output pipe 41 are respectively arranged on both sides of the support structure 30, so as to extend the effective path of the heat exchange channel 13 and improve the heat exchange efficiency.

[0049] In one embodiment, please refer to Figure 4 The reaction pipeline 20 further includes a liquid inlet pipe 23 and an air inlet pipe 22 , and the air inlet pipe 22 and the liquid inlet pipe 23 are both connected to the first pipeline unit 21 .

[0050] For further information, please refer to Figure 4 The reaction pipe 20 further includes a mixing chamber 24, the air inlet pipe 22 and the liquid inlet pipe 23 are both connected to the mixing chamber 24, the mixing chamber 24 is connected to the first pipe unit 21, and the cross-sectional area of ​​at least part of the mixing chamber 24 is larger than the cross-sectional area of ​​the pipe unit 21. It can be seen that the mixing chamber 24 is arranged at the downstream end of the air inlet pipe 22 and the liquid inlet pipe 23, so that the incoming gas and liquid are fully mixed in the mixing chamber 24, the mixing uniformity between different phases is improved, and it is beneficial to improve the reaction rate between different phases.

[0051] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A microchannel reactor, characterized in that: include: Heat exchange shell (10); A reaction pipeline (20) is arranged in the heat exchange shell (10) and forms a heat exchange channel (13) with the heat exchange shell (10). The reaction pipeline (20) comprises a plurality of pipeline units (21) which are connected in sequence and arranged in parallel. Each of the pipeline units (21) comprises a plurality of pipeline sections (211) which are serpentinely distributed along the height direction. Each of the pipeline sections (211) is connected in sequence from head to tail, and a gap (25) is formed between two adjacent pipeline sections (211). A support structure (30) is detachably arranged in the heat exchange shell (10), and the support structure (30) comprises a connecting piece (31), two supporting plates (33) and a plurality of supporting plates (32) located between the two supporting plates (33); the supporting plates (32) are located in the gap (25), and first card slots (321) are provided on opposite sides of the supporting plates (32); the first card slots (321) are used to snap into the pipeline section (211) on one side; the two supporting plates (33) are respectively located at two ends of the pipeline unit (21) in a height direction; a second card slot (331) for snapping into the pipeline section (211) is provided on a side of each supporting plate (33) facing the pipeline unit (21); and the connecting piece (31) is used to detachably connect each supporting plate (33) with each supporting plate (32).

2. A microchannel reactor according to claim 1, characterized in that: The heat exchange shell (10) comprises an outer shell (11) and a cover body (12) covering the open end of the outer shell (11); a limit block (14) is provided on the inner wall of the outer shell (11); a push rod (122) is provided on the cover body (12); when the cover body (12) is covered on the outer shell (11), the push rod (122) can push the support plate (33) so that the support plate (33) abuts against the limit block (14).

3. A microchannel reactor according to claim 2, characterized in that: The support structure (30) further comprises an elastic member (34), wherein the elastic member (34) is arranged on a side of the support plate (33) facing away from the cover body (12), and the elastic member (34) is used to elastically abut between the limit block (14) and the support plate (33).

4. A microchannel reactor according to claim 1, characterized in that: The support plate (32) is provided with a first through hole (322) penetrating along the thickness direction thereof, and the support plate (33) is provided with a second through hole (332) penetrating along the thickness direction thereof.

5. A microchannel reactor according to claim 1, characterized in that: A flow groove (333) is provided on one side of each support plate (33) away from the second clamping groove (331), and support protrusions (334) are formed on both sides of the flow groove (333), and the support protrusions (334) are used to contact the inner wall of the heat exchange shell (10).

6. A microchannel reactor according to claim 5, characterized in that: A plurality of flow-blocking protrusions (335) are provided on the groove wall of the flow-passing groove (333), and the flow-blocking protrusions (335) are distributed at intervals along the width direction of the support structure (30).

7. A microchannel reactor according to any one of claims 1 to 6, characterized in that: The microchannel reactor further comprises an input pipe (40) and an output pipe (41); the support structure (30) divides the heat exchange channel (13) into a first split cavity (131) and a second split cavity (132) which are interconnected along the length direction of the heat exchange shell (10); the input pipe (40) is connected to the first split cavity (131), and the output pipe (41) is connected to the second split cavity (132).

8. A microchannel reactor according to any one of claims 1 to 6, characterized in that: The reaction pipeline (20) further comprises a liquid inlet pipe (23) and an air inlet pipe (22), and the air inlet pipe (22) and the liquid inlet pipe (23) are both connected to the first pipeline unit (21).

9. A microchannel reactor according to claim 8, characterized in that: The reaction pipeline (20) further comprises a mixing chamber (24), the air inlet pipe (22) and the liquid inlet pipe (23) are both connected to the mixing chamber (24), the mixing chamber (24) is connected to the first pipeline unit (21), and the cross-sectional area of ​​at least part of the mixing chamber (24) is greater than the cross-sectional area of ​​the pipeline unit (21).

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