Microchannel reactor

Abstract

The present application relates to the field of reactor, disclose a kind of relatively simple structure, easy to assemble microchannel reactor, the microchannel reactor includes gas inlet seat, gas outlet seat, reaction tube and lamp tube, gas inlet seat, gas outlet seat between being equipped with reaction tube and lamp tube, reaction tube is multiple, multiple reaction tube is arranged in the circumferential interval around lamp tube;Gas inlet seat has first converging cavity, second converging cavity, first input hole, second input hole and input passage, first input hole is communicated with first converging cavity, second input hole is communicated with second converging cavity, the number of input passage is multiple, multiple input passage and multiple reaction tube are one-to-one corresponding cooperation, each input passage is communicated first converging cavity, second converging cavity and corresponding reaction tube;Gas outlet seat has output passage, third converging cavity and output hole, the number of output passage is multiple, multiple output passage and multiple reaction tube are one-to-one corresponding cooperation, each output passage is communicated with third converging cavity, output hole is communicated third converging cavity.

Description

Technical Field

[0001] This invention belongs to the field of reactors, and more specifically, relates to a microchannel reactor. Background Technology

[0002] A photocatalytic reactor is a device that uses a light source to excite a catalyst to undergo a chemical reaction. It is widely used in wastewater treatment, air purification, and organic synthesis. A photocatalytic reactor consists of a light source assembly and reaction tubes. The reaction materials flow through the reaction tubes, and the catalytic reaction occurs under light irradiation. In related technologies, photocatalytic reactors typically have multiple reaction tubes arranged in a circular array around the light source. In practical applications, each reaction tube needs to be supplied with fluid. Therefore, each reaction tube is equipped with an independent inlet pipe and connecting joint, and each inlet pipe is then connected to a main supply pipe. This type of photocatalytic reactor has numerous pipes, a complex structure, and is inconvenient to assemble. Summary of the Invention

[0003] The main objective of this invention is to provide a microchannel reactor with a relatively simple structure and easy assembly.

[0004] According to a first aspect of the present invention, a microchannel reactor is provided, comprising an inlet seat, an outlet seat, a reaction tube, and a lamp tube. The inlet seat and the outlet seat are arranged at intervals along a first direction. The reaction tube and the lamp tube are disposed between the inlet seat and the outlet seat. The reaction tube extends along the first direction. There are multiple reaction tubes. The multiple reaction tubes are arranged around the lamp tube and at intervals along the circumference of the lamp tube. The inlet seat, the outlet seat, and the reaction tube form a ventilation channel that extends through the first direction.

[0005] The air intake seat has a first manifold, a second manifold, a first input port, a second input port, and an input channel. The first manifold and the second manifold are both annular and spaced apart. The first input port communicates with the first manifold, and the second input port communicates with the second manifold. There are multiple input channels, and each input channel corresponds to a reaction tube. Each input channel communicates with the first manifold, the second manifold, and the corresponding reaction tube.

[0006] The gas outlet has an output channel, a third manifold, and an output hole. There are multiple output channels, and each output channel and each reaction tube are matched in a one-to-one correspondence. Each output channel is connected to the third manifold, and the output hole is connected to the third manifold.

[0007] In a specific embodiment of the present invention, the input channel includes a first channel segment and a second channel segment. The first channel segment connects the first manifold and the reaction tube, and the second channel segment connects the first channel segment and the second manifold. The extension directions of the first channel segment and the extension directions of the second channel segment intersect to form a hybrid structure.

[0008] In a specific embodiment of the present invention, the diameter of the first channel segment is 0.1-1 mm, and the diameter of the second channel segment is 0.1-1 mm.

[0009] In one particular embodiment of the present invention, all of the reaction tubes form a ring-shaped reaction layer;

[0010] The microchannel reactor further includes an inner surrounding layer and an outer surrounding structure. Both the inner surrounding layer and the outer surrounding structure are annular and are arranged around the lamp tube. The outer side of the inner surrounding layer is connected to the inner side of the annular reaction layer, and the inner side of the outer surrounding structure is connected to the outer side of the annular reaction layer.

[0011] In a specific embodiment of the present invention, the inner surrounding layer is made of a transparent material or stainless steel.

[0012] When the inner surrounding layer is made of stainless steel, the number of the inner surrounding layers is a plurality of layers spaced apart along the first direction.

[0013] In a specific embodiment of the present invention, the outer enclosure structure includes a protective layer and a rigid shell, the protective layer being connected to the annular reactive layer, and the rigid shell being disposed outside the protective layer.

[0014] In a specific embodiment of the present invention, the protective coating is made of fiberglass cloth, and the protective coating is bonded to the annular reactive layer.

[0015] In one specific embodiment of the present invention, the outer enclosure structure further includes a shock-resistant filling layer, which is connected between the protective covering layer and the rigid outer shell.

[0016] One of the above-described technical solutions of the present invention has at least one of the following advantages or beneficial effects:

[0017] In the microchannel reactor of this invention, fluid enters the first manifold through the first input port and the second manifold through the second input port. Then, it is directly distributed to the corresponding reaction tubes via multiple input channels that correspond one-to-one with the reaction tubes. The air inlet itself realizes fluid convergence and distribution, eliminating the need for separate inlet pipes and connectors for each reaction tube, as well as the need for an additional main liquid supply pipeline connection structure. This reduces the number of pipelines, simplifies the overall structure of the microchannel reactor, and lowers assembly difficulty. The air outlet has multiple output channels, a third manifold, and an output port that correspond one-to-one with the reaction tubes. The products from each reaction tube are collected in the third manifold through the corresponding output channel and then discharged uniformly through the output port. This eliminates the need for separate pipelines and connectors on the liquid outlet side, further simplifying the overall structure of the microchannel reactor and reducing assembly difficulty. Furthermore, the microchannel reactor has a ventilation channel. By introducing air at a preset temperature and flow rate into the ventilation channel, the internal temperature of the microchannel reactor can be controlled, providing a suitable temperature environment for the reaction and ensuring stable reaction.

[0018] The extension directions of the first channel segment and the second channel segment intersect, forming a T-shaped or Y-shaped structure that can play a mixing role. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0020] Figure 1 This is a structural diagram of the microchannel reactor according to an embodiment of the present invention;

[0021] Figure 2 This is a cross-sectional view of the microchannel reactor according to an embodiment of the present invention;

[0022] Figure 3 This is a cross-sectional view of the air intake seat according to an embodiment of the present invention;

[0023] Figure 4 This is a cross-sectional view of the air outlet seat according to an embodiment of the present invention.

[0024] The figure labels for each figure are as follows:

[0025] 1. Air intake seat; 101. First manifold; 102. Second manifold; 103. First input port; 104. Second input port; 105. Input channel; 105A. First channel section; 105B. Second channel section;

[0026] 2. Air outlet seat; 201. Output channel; 202. Third manifold; 203. Output port;

[0027] 3. Reaction tube;

[0028] 4. Light bulbs;

[0029] 5. Inner surrounding layer;

[0030] 6. Outer enclosure structure; 61. Protective covering layer; 62. Rigid outer shell; 63. Seismic filling layer;

[0031] 100. Ventilation ducts;

[0032] X, the first direction. Detailed Implementation

[0033] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0034] Reference Figures 1 to 4 As shown, a preferred embodiment of the microchannel reactor of this application includes an inlet seat 1, an outlet seat 2, a reaction tube 3, and a lamp tube 4. The inlet seat 1 and the outlet seat 2 are arranged at intervals along a first direction X. The reaction tube 3 and the lamp tube 4 are disposed between the inlet seat 1 and the outlet seat 2. The reaction tube 3 extends along the first direction X, and there are multiple reaction tubes 3. The multiple reaction tubes 3 are arranged around the lamp tube 4 and at intervals along the circumference of the lamp tube 4. The inlet seat 1, the outlet seat 2, and the reaction tube 3 form a ventilation channel 100 that runs through along the first direction X. The inlet seat 1 has a first confluence cavity 101, a second confluence cavity 102, a first input hole 103, a second input hole 104, and an input channel 105. The first confluence cavity 101 and the second confluence cavity 102 are both annular and are arranged at intervals. The first input hole 103... 3 is connected to the first manifold 101, and the second input port 104 is connected to the second manifold 102. There are multiple input channels 105, and multiple input channels 105 and multiple reaction tubes 3 are matched one-to-one. Each input channel 105 is connected to the first manifold 101, the second manifold 102 and the corresponding reaction tube 3, and the input channel 105 is sealed to the corresponding reaction tube 3. The gas outlet seat 2 has an output channel 201, a third manifold 202 and an output port 203. There are multiple output channels 201, and multiple output channels 201 are matched one-to-one with multiple reaction tubes 3. One end of each output channel 201 is connected to the third manifold 202 and the other end is sealed to the corresponding reaction tube 3. The output port 203 is connected to the third manifold 202.

[0035] In the microchannel reactor of this invention, fluid enters the first manifold 101 through the first inlet 103 and the second manifold 102 through the second inlet 104. Then, it is directly distributed to the corresponding reaction tubes 3 via multiple inlet channels 105 that correspond one-to-one with the reaction tubes 3. The inlet seat 1 itself realizes fluid convergence and distribution, eliminating the need for separate inlet pipes and connectors for each reaction tube 3, as well as the need for an additional main liquid supply pipeline connection structure. This reduces the number of pipelines, simplifies the overall structure of the microchannel reactor, and lowers assembly difficulty. Meanwhile, the outlet seat 2 has a corresponding connection to each reaction tube 3. Multiple output channels 201, a third confluence chamber 202, and an output port 203 are provided. The products from each reaction tube 3 are collected in the third confluence chamber 202 through the corresponding output channel 201 and then discharged uniformly through the output port 203. This eliminates the need for separate pipelines and connectors on the liquid outlet side, further simplifying the overall structure of the microchannel reactor and reducing assembly difficulty. In addition, the microchannel reactor has a ventilation channel 100. By introducing air at a preset temperature and flow rate into the ventilation channel 100, the internal temperature of the microchannel reactor can be controlled, providing a suitable temperature for the reaction environment and ensuring stable reaction.

[0036] The annular first manifold 101 and second manifold 102 can distribute the fluid evenly to each input channel 105 along the circumference, ensuring that the fluid supply conditions in each reaction tube 3 tend to be consistent.

[0037] It should be noted that the reaction tube 3 is a transparent tube so that the fluid inside can react under the illumination of the lamp tube 4. This is prior art, and this application will not elaborate on it further. The number of reaction tubes 3 is determined according to the actual application, and this application does not limit it. In practical applications, the first input port 103 and the second input port 104 are respectively connected to external fluid delivery pipes, and the output port 203 is connected to an external drain pipe. The number of output ports 203 can be one, two, or more, and this application does not limit it.

[0038] In other embodiments, the number of manifolds in the air inlet 1 can be multiple, each manifold is connected to an input port, and each manifold is connected to the reaction tube 3 through an input channel. For example, the air inlet 1 may also have a fourth manifold, which is connected to a third input port. The third input port is externally connected to a fluid delivery pipe, and the input channel 105 connects the first manifold 101, the second manifold 102, the fourth manifold, and the reaction tube 3. In this case, the microchannel reactor can be used for the reaction of three fluids.

[0039] In this embodiment, both the air inlet seat 1 and the air outlet seat 2 are annular structures.

[0040] In this embodiment, the input channel 105 includes a first channel segment 105A and a second channel segment 105B. The first channel segment 105A connects the first manifold 101 and the reaction tube 3, and the second channel segment 105B connects the first channel segment 105A and the second manifold 102. The extension directions of the first channel segment 105A and the second channel segment 105B intersect to form a mixing structure, so that the fluid in the second manifold 102 flows into the first channel segment 105A through the second channel segment 105B. This fluid merges with the fluid input into the first manifold 101 through the first channel segment 105A before entering the reaction tube 3, realizing the premixing of the two fluids in the input channel 105, which is beneficial to improving the mixing uniformity of the fluid entering the reaction tube 3. For example, the first channel segment 105A and the second channel segment 105B are perpendicular to each other. In this case, the first channel segment 105A and the second channel segment 105B form a T-shaped structure, which serves as a mixing function. In other embodiments, the first channel segment 105A and the second channel segment 105B form a Y-shaped structure, which also serves as a mixing function.

[0041] In this embodiment, the diameter of the first channel segment 105A is 0.1-1mm, and the diameter of the second channel segment 105B is 0.1-1mm. The first channel segment 105A and the second channel segment 105B meet this range, and the mixing effect of the fluid transported by the two is good.

[0042] In this embodiment, all reaction tubes 3 form an annular reaction layer; the microchannel reactor also includes an inner surrounding layer 5 and an outer surrounding structure 6. Both the inner surrounding layer 5 and the outer surrounding structure 6 are annular and are arranged around the lamp tube 4. The outer side of the inner surrounding layer 5 is connected to the inner side of the annular reaction layer, and the inner side of the outer surrounding structure 6 is connected to the outer side of the annular reaction layer. Specifically, the arrangement of the inner surrounding layer 5 and the outer surrounding structure 6 enables multiple reaction tubes 3 to be stably arranged. The reaction tubes 3 are relatively long and not easily bent. The microchannel reactor structure is reliable, ensuring the stable progress of the fluid reaction.

[0043] In this embodiment, the inner surrounding layer 5 is made of a transparent material, which does not obstruct the light source of the lamp tube 4, ensuring that the reaction proceeds normally. In other embodiments, the inner surrounding layer 5 can also be made of stainless steel. In this case, there are multiple inner surrounding layers 5 spaced apart along the first direction X. In this case, the inner surrounding layers 5 will not excessively obstruct the light source of the lamp tube 4, and the reaction can still proceed normally. In practical applications, the length of a single inner surrounding layer 5 along the first direction X can be set to be smaller, which can reduce the obstruction of the light source. It should be noted that the number of inner surrounding layers 5 is determined according to the actual application, and this application does not limit it.

[0044] In this embodiment, the outer enclosure structure 6 includes a protective layer 61 and a rigid outer shell 62. The protective layer 61 is connected to the annular reaction layer, and the rigid outer shell 62 is disposed outside the protective layer 61. The protective layer 61 serves a protective function, preventing the rigid outer shell 62 from directly contacting the reaction tube 3 and causing wear or crush damage. Furthermore, the rigid outer shell 62, located outside the protective layer 61, provides rigid support for the entire annular reaction layer, resisting external impacts and compression, enhancing the overall structural strength of the microchannel reactor, and ensuring high reliability. Specifically, the rigid outer shell 62 is made of stainless steel.

[0045] In this embodiment, the protective layer 61 is made of fiberglass cloth, which is bonded to the annular reactive layer for easy assembly. Specifically, the fiberglass cloth has high temperature resistance and corrosion resistance, and while providing protection, it can withstand the light and high temperature environment generated by the long-term operation of the lamp tube 4. In other embodiments, the protective layer 61 can also be other wrapping materials known to those skilled in the art for fixing, and this application does not limit this.

[0046] In this embodiment, the outer enclosure structure 6 also includes a shock-resistant filling layer 63, which is connected between the protective covering layer 61 and the rigid outer shell 62. Specifically, the shock-resistant filling layer 63 is made of foam material, which is lightweight, elastic, and has the characteristics of energy absorption and shock reduction, and can absorb and buffer the energy generated by external impacts and vibrations.

[0047] In this application, the inner surrounding layer 5, the outer surrounding structure 6, and the annular reaction layer constitute the reaction body. Multiple reaction bodies can be arranged along the first direction X. The reaction tubes 3 in adjacent reaction bodies are sealed together one-to-one, for example, through joints. The rigid outer shell 62 of the outer surrounding structure 6 in adjacent reaction bodies is detachably connected by screws. In the first direction X, the first reaction body is connected to the inlet seat 1, and the last reaction body is connected to the outlet seat 2. Therefore, the overall length of the reaction tubes 3 can be flexibly adjusted by increasing or decreasing the number of reaction bodies to adapt to different reaction residence time requirements, improving the applicability and scalability of the microchannel reactor. It should be noted that the length of the lamp tube 4 is adapted to the length of the reaction tubes 3, and is designed according to actual application to ensure smooth reaction; this application does not impose any limitations on this.

[0048] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A microchannel reactor, characterized in that, It includes an air inlet seat (1), an air outlet seat (2), a reaction tube (3), and a lamp tube (4). The air inlet seat (1) and the air outlet seat (2) are arranged at intervals along a first direction (X). The reaction tube (3) and the lamp tube (4) are provided between the air inlet seat (1) and the air outlet seat (2). The reaction tube (3) extends along the first direction. There are multiple reaction tubes (3). Multiple reaction tubes (3) surround the lamp tube (4) and are arranged at intervals along the circumference of the lamp tube (4). The air inlet seat (1), the air outlet seat (2), and the reaction tube (3) form a ventilation channel (100) that runs through the first direction (X). The air intake seat (1) has a first manifold (101), a second manifold (102), a first input hole (103), a second input hole (104), and an input channel (105). The first manifold (101) and the second manifold (102) are both annular and spaced apart. The first input hole (103) is connected to the first manifold (101), and the second input hole (104) is connected to the second manifold (102). There are multiple input channels (105), and multiple input channels (105) and multiple reaction tubes (3) are matched one-to-one. Each input channel (105) is connected to the first manifold (101), the second manifold (102), and the corresponding reaction tube (3). The gas outlet seat (2) has an output channel (201), a third confluence cavity (202) and an output hole (203). There are multiple output channels (201), and multiple output channels (201) and multiple reaction tubes (3) are matched one-to-one. Each output channel (201) is connected to the third confluence cavity (202), and the output hole (203) is connected to the third confluence cavity (202).

2. The microchannel reactor according to claim 1, characterized in that, The input channel (105) includes a first channel segment (105A) and a second channel segment (105B). The first channel segment (105A) connects the first manifold (101) and the reaction tube (3). The second channel segment (105B) connects the first channel segment (105A) and the second manifold (102). The extension directions of the first channel segment (105A) and the extension directions of the second channel segment (105B) intersect to form a hybrid structure.

3. The microchannel reactor according to claim 2, characterized in that, The diameter of the first channel segment (105A) is 0.1-1mm, and the diameter of the second channel segment (105B) is 0.1-1mm.

4. The microchannel reactor according to claim 1, characterized in that, All of the aforementioned reaction tubes (3) form a ring-shaped reaction layer; The microchannel reactor further includes an inner surrounding layer (5) and an outer surrounding structure (6). The inner surrounding layer (5) and the outer surrounding structure (6) are both annular. The inner surrounding layer (5) and the outer surrounding structure (6) are arranged around the lamp tube (4). The outer side of the inner surrounding layer (5) is connected to the inner side of the annular reaction layer, and the inner side of the outer surrounding structure (6) is connected to the outer side of the annular reaction layer.

5. The microchannel reactor according to claim 4, characterized in that, The inner surrounding layer (5) is made of transparent material or stainless steel. When the inner enclosure layer (5) is made of stainless steel, the number of the inner enclosure layers (5) is a plurality of layers spaced apart along the first direction (X).

6. The microchannel reactor according to claim 4, characterized in that, The outer enclosure structure (6) includes a protective layer (61) and a rigid shell (62). The protective layer (61) is connected to the annular reactive layer, and the rigid shell (62) is disposed on the outside of the protective layer (61).

7. The microchannel reactor according to claim 6, characterized in that, The protective coating (61) is made of fiberglass cloth and is bonded to the annular reactive layer.

8. The microchannel reactor according to claim 6, characterized in that, The outer enclosure structure (6) also includes a seismic filling layer (63) connected between the protective covering layer (61) and the rigid outer shell (62).

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