Micro-channel reactor

Abstract

The utility model discloses a micro-channel reactor, which relates to the technical field of micro-reactors and comprises a plurality of reaction channel units which are sequentially connected. The reaction channel unit comprises a first channel unit and a second channel unit; the first channel unit is provided with a first inlet, at least two first arc-shaped channels and a first outlet, one end of each first arc-shaped channel is connected and communicated with the first inlet, and the other end of each first arc-shaped channel is connected and communicated with the first outlet; the second channel unit is provided with a second inlet, at least two second arc-shaped channels and a second outlet, one end of each second arc-shaped channel is connected and communicated with the second inlet, and the other end of each second arc-shaped channel is connected and communicated with the second outlet; the curvature of the first arc-shaped channel is different from that of the second arc-shaped channel, and the first outlet can communicate with the second inlet. The flowing efficiency of the fluid is improved, and the uniform mixing effect is better achieved.

Description

Technical Field

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

[0002] When a chemical plant is producing or developing a product, it often encounters the problem of insufficient reaction of the raw materials due to poor mixing of the raw materials.

[0003] In the chemical production process, the performance of the reactor directly affects the quality and production efficiency of the product. Although the existing microchannel reactors such as patent CN107261998A have the advantages of small volume and large specific surface area, they still have the problems of poor mixing effect of viscous fluid and slow reaction speed, which affect the reaction effect. Therefore, it is necessary to improve the fluid flow efficiency so as to better achieve the purpose of uniform mixing. Utility Model Content

[0004] The purpose of the utility model is to provide a microchannel reactor to solve the problems existing in the above-mentioned prior art, improve the fluid flow efficiency, and achieve a better mixing effect.

[0005] To achieve the above purpose, the utility model provides the following solutions:

[0006] The utility model provides a microchannel reactor, comprising a plurality of reaction channel units, each of which is connected in sequence; the reaction channel unit comprises a first channel unit and a second channel unit; the first channel unit has a first inlet, at least two first arc-shaped channels and a first outlet, one end of each of the first arc-shaped channels is connected and communicated with the first inlet, and the other end of each of the first arc-shaped channels is connected and communicated with the first outlet; the second channel unit has a second inlet, at least two second arc-shaped channels and a second outlet, one end of each of the second arc-shaped channels is connected and communicated with the second inlet, and the other end of each of the second arc-shaped channels is connected and communicated with the second outlet; the first arc-shaped channel and the second arc-shaped channel have different curvatures, and the first outlet can be communicated with the second inlet.

[0007] Preferably, the first outlet is connected to and communicated with one end of the straight channel, and the other end of the straight channel is connected to and communicated with the second inlet.

[0008] Preferably, a plurality of connected reaction channel units form a branch reaction channel group; two adjacent reaction channels in the branch reaction channel group are connected end to end; each branch reaction channel group is arranged in parallel; in the flow direction of the fluid medium, the second outlet at the starting end of the branch reaction channel group is connected and communicated with the second outlet at the ending end of the previous branch reaction channel group, and the first inlet at the ending end of the branch reaction channel group is connected and communicated with the first inlet at the starting end of the next branch reaction channel.

[0009] Preferably, the first channel unit includes an arc-shaped cavity and an arc-shaped baffle, and the arc-shaped cavity is provided with the first inlet and the first outlet connected thereto; the arc-shaped baffle is fixedly arranged in the arc-shaped cavity, and the arc-shaped baffle divides the arc-shaped cavity into two symmetrical first arc-shaped channels; the first inlet is located at the butt joint of one end of the two first arc-shaped channels, and the first outlet is located at the butt joint of the other end of the two first arc-shaped channels.

[0010] Preferably, the second channel unit includes a columnar cavity and a spoiler column, the columnar cavity is provided with the second inlet and the second outlet connected thereto; the spoiler column is fixedly arranged in the columnar cavity, and the spoiler column divides the columnar cavity into two symmetrical second arc-shaped channels; the second inlet is located at the butt joint of one end of the two second arc-shaped channels, and the second outlet is located at the butt joint of the other end of the two second arc-shaped channels.

[0011] Preferably, a premixing device is also included; the premixing device includes a premixing tube and a mixing structure, and the mixing structure is arranged in the premixing tube; the inlet end of the premixing tube is used for fluid medium injection; the mixing structure is used for premixing of the fluid medium; in the flow direction of the fluid medium, the outlet of the premixing tube is connected and communicated with the first inlet at the starting end of the first branch reaction channel group.

[0012] Preferably, the inlet end of the premixing tube has at least two material inlets.

[0013] Preferably, the first channel unit and the second channel unit are different in size; on the same horizontal line, a certain first channel unit on each branch reaction channel group corresponds to a position of a second channel unit on an adjacent branch reaction channel group.

[0014] Preferably, two adjacent branch reaction channel groups are connected and communicated via an arc-shaped connecting channel.

[0015] Preferably, in the flow direction of the fluid medium, the last end of the last branch reaction channel group is connected to a reaction liquid outlet.

[0016] Compared with the prior art, the utility model has achieved the following technical effects:

[0017] The microchannel reactor provided by the utility model comprises a first channel unit and a second channel unit to form a reaction channel unit, a fluid medium flows in the first channel unit and the second channel unit which are arranged alternately, and based on the different curvatures of the first arc-shaped channel and the second arc-shaped channel, the flow velocity of the fluid medium is related to the curvature radius of the streamline, the flow velocity decreases as the radius increases, and the flow velocity increases as the radius decreases, and the flow state of the viscous fluid medium is changed by alternating the curvature and shape of the channel, thereby reducing the influence of the viscosity of the reaction fluid medium, reducing the viscous resistance of the fluid medium, improving the flow efficiency of the fluid medium, achieving the purpose of better mixing uniformity, and at the same time improving the mass transfer and heat transfer effects of the fluid medium, and having a simple structure.

[0018] Furthermore, the first channel unit and the second channel unit are connected via a straight channel, and the flow medium after passing through the first channel unit can enter the second channel unit more evenly through the straight channel.

[0019] Furthermore, a plurality of branch reaction channel groups are used to form the entire device, and two adjacent branch reaction channel groups are connected in reverse to improve the flow efficiency of the fluid medium and achieve better mass transfer and heat transfer effects.

[0020] Furthermore, the first channel unit is composed of an arc-shaped cavity and an arc-shaped baffle, and has a simple structure and is convenient for processing and manufacturing.

[0021] Furthermore, the second channel unit is composed of a columnar cavity and a spoiler column, and has a simple structure and is easy to process and manufacture.

[0022] Furthermore, a premixing device is provided at the starting end, which can premix the incoming fluid medium, improve the uniform mixing effect of the fluid medium, and increase its flow efficiency as well as mass transfer and heat transfer effects.

[0023] Furthermore, the premixing tube has at least two material inlets, which facilitates the connection and injection of different materials.

[0024] Furthermore, the first channel unit and the second channel unit in two adjacent branch reaction channel groups are arranged relative to each other, that is, staggered, which can effectively reduce the overall size in the staggered arrangement direction and reduce the occupied space.

[0025] Furthermore, two adjacent branch reaction channel groups are connected via an arc-shaped connecting channel, which has a simple structure and is convenient for arranging the branch reaction channel groups.

[0026] Furthermore, the provided reaction liquid outlet facilitates the directional and stable discharge of the final fluid medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] 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 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 these drawings without paying creative work.

[0028] Figure 1 The overall structural schematic diagram of the microchannel reactor provided by the utility model;

[0029] Figure 2 This is a schematic structural diagram of the first reaction channel unit in the microchannel reactor provided by the utility model;

[0030] Figure 3 A schematic diagram of the flow path of the fluid medium in the first reaction channel unit in the microchannel reactor provided by the utility model;

[0031] Figure 4 A schematic diagram of the dimensions of a first type of reaction channel unit in a microchannel reactor provided by the utility model;

[0032] Figure 5 This is a schematic structural diagram of a second reaction channel unit in a microchannel reactor provided by the utility model;

[0033] Figure 6 A schematic diagram of the flow path of the fluid medium in the second reaction channel unit in the microchannel reactor provided by the utility model;

[0034] Figure 7 A schematic diagram of the dimensions of a second type of reaction channel unit in a microchannel reactor provided by the utility model;

[0035] Figure 8 This is a schematic structural diagram of a third reaction channel unit in a microchannel reactor provided by the utility model;

[0036] Fig. 9 A schematic diagram of the flow path of the fluid medium in the third reaction channel unit in the microchannel reactor provided by the utility model;

[0037] Fig.10 This is a schematic diagram of the dimensions of the third type of reaction channel unit in the microchannel reactor provided by the utility model.

[0038] In the figure:

[0039] 100-microchannel reactor;

[0040] 10-premixing device; 11-premixing pipe; 12-mixing structure; 13-material inlet;

[0041] 20-branch reaction channel group; 21-arc connecting channel;

[0042] 30-reaction channel unit; 31-first channel unit; 311-first inlet; 312-first arc-shaped channel; 313-first outlet; 314-arc-shaped baffle; 32-second channel unit; 321-second inlet; 322-second arc-shaped channel; 323-second outlet; 324-spoiler column; 33-straight channel; 34-connecting channel;

[0043] 40-reaction liquid outlet. DETAILED DESCRIPTION

[0044] 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 in 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.

[0045] The utility model aims to provide a microchannel reactor to solve the problems existing in the prior art, improve the fluid flow efficiency and achieve a better mixing effect.

[0046] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0047] Embodiment 1

[0048] The utility model provides a microchannel reactor 100, mainly but not limited to high viscosity liquid reaction, such as Figures 1 to 10 As shown, it includes a plurality of reaction channel units 30, and each reaction channel unit 30 is connected in sequence; the reaction channel unit 30 includes a first channel unit 31 and a second channel unit 32; the first channel unit 31 has a first inlet 311, at least two first arc-shaped channels 312 and a first outlet 313, one end of each first arc-shaped channel 312 is connected and communicated with the first inlet 311, and the other end of each first arc-shaped channel 312 is connected and communicated with the first outlet 313; the second channel unit 32 has a second inlet 321, at least two second arc-shaped channels 322 and a second outlet 323, one end of each second arc-shaped channel 322 is connected and communicated with the second inlet 321, and the other end of each second arc-shaped channel 322 is connected and communicated with the second outlet 323; the first arc-shaped channel 312 and the second arc-shaped channel 322 have different curvatures, and the first outlet 313 can be communicated with the second inlet 321.

[0049] The reaction channel unit 30 is composed of the first channel unit 31 and the second channel unit 32, and the fluid medium flows in the alternately arranged first channel unit 31 and the second channel unit 32. Based on the different curvatures of the first arc channel 312 and the second arc channel 322, the flow velocity of the fluid medium is related to the curvature radius of the streamline. The flow velocity decreases as the radius increases, and the flow velocity increases as the radius decreases. By alternating the curvature and shape of the channel, the flow state of the viscous fluid medium is changed, the influence of the viscosity of the reaction fluid medium is reduced, the viscous resistance of the fluid medium is reduced, the flow efficiency of the fluid medium is improved, and the purpose of better mixing and uniformity is achieved. At the same time, the mass transfer and heat transfer effects of the fluid medium are improved, and the structure is simple.

[0050] Wherein, a premixing device 10 is arranged at the position where the fluid medium enters:

[0051] Among the optional solutions of this embodiment, it is more preferred that Figure 1 to Figure 3 As shown, it also includes a premixing device 10; the premixing device 10 includes a premixing tube 11 and a mixing structure 12, and the mixing structure 12 is arranged in the premixing tube 11; the inlet end of the premixing tube 11 is used for fluid medium injection; the mixing structure 12 is used for premixing the fluid medium; in the flow direction of the fluid medium, the outlet of the premixing tube 11 is connected and communicated with the first inlet 311 at the starting end of the first branch reaction channel group 20. The premixing device 10 is also arranged at the starting end, which can premix the incoming fluid medium, improve the uniform mixing effect of the fluid medium, and increase its flow efficiency and mass transfer and heat transfer effects.

[0052] Among the optional solutions of this embodiment, it is more preferred that Figure 1 to Figure 3 As shown, the inlet end of the premixing tube 11 has at least two material inlets 13. The premixing tube 11 has at least two material inlets 13, which facilitates the connection and injection of different materials.

[0053] Specifically, the mixing structure 12 is an existing component, such as a mixing unit inside a SK static mixer.

[0054] The microchannel reactor 100 is composed of a plurality of branch reaction channel groups 20:

[0055] Among the optional solutions of this embodiment, it is more preferred that Figure 1As shown, a plurality of connected reaction channel units 30 form a branch reaction channel group 20; two adjacent reaction channels in the branch reaction channel group 20 are connected end to end; each branch reaction channel group 20 is arranged in parallel; in the flow direction of the fluid medium, the second outlet 323 at the starting end of the branch reaction channel group 20 is connected and communicated with the second outlet 323 at the ending end of the previous branch reaction channel group 20, and the first inlet 311 at the ending end of the branch reaction channel group 20 is connected and communicated with the first inlet 311 at the starting end of the next branch reaction channel. The entire device is formed by using a plurality of branch reaction channel groups 20, and two adjacent branch reaction channel groups 20 are connected in reverse connection to improve the flow efficiency of the fluid medium and achieve better mass transfer and heat transfer effects.

[0056] Specifically, the arrangement and number of the reaction channel units 30 included in each branch reaction channel are the same, and the connection method thereof is as follows: Figure 1 As shown, the tail of the first branch reaction channel is connected to the tail of the second branch reaction channel at the same position, the head of the second branch reaction channel is connected to the head of the third branch reaction channel, the tail of the third branch reaction channel is connected to the tail of the fourth branch reaction channel, and the subsequent channels are connected in sequence according to the above rules.

[0057] Specifically, two adjacent reaction channel units 30 in each branch reaction channel are connected via a connecting channel 34 .

[0058] Specifically, the first channel unit 31 and the second channel unit 32 in the reaction channel unit 30 are different in shape and size.

[0059] Among the optional solutions of this embodiment, it is more preferred that Figure 1 As shown, the first channel unit 31 and the second channel unit 32 have different sizes; on the same horizontal line, a first channel unit 31 on each branch reaction channel group 20 corresponds to a second channel unit 32 on an adjacent branch reaction channel group 20. The first channel unit 31 and the second channel unit 32 in two adjacent branch reaction channel groups 20 are arranged opposite to each other, that is, staggered, which can effectively reduce the overall size in the staggered arrangement direction and reduce its occupied space.

[0060] Among the optional solutions of this embodiment, it is more preferred that Figure 1 As shown, two adjacent branch reaction channel groups 20 are connected and communicated through an arc-shaped connecting channel 21. Two adjacent branch reaction channel groups 20 are connected through an arc-shaped connecting channel 21, which has a simple structure and is convenient for arranging each branch reaction channel group 20.

[0061] Among them, other related structures of the reaction channel unit 30 are:

[0062] Among the optional solutions of this embodiment, it is more preferred that Figures 1 to 10 As shown, the first outlet 313 is connected and communicated with one end of the straight channel 33, and the other end of the straight channel 33 is connected and communicated with the second inlet 321. The first channel unit 31 and the second channel unit 32 are connected through the straight channel 33, and the flow medium after passing through the first channel unit 31 can enter the second channel unit 32 more evenly through the straight channel 33.

[0063] Specifically, the specific formation method of the first channel unit 31 in the reaction channel unit 30 is as follows:

[0064] Among the optional solutions of this embodiment, it is more preferred that Figures 1 to 10 As shown, the first channel unit 31 includes an arc-shaped cavity and an arc-shaped baffle 314, and the arc-shaped cavity is provided with a first inlet 311 and a first outlet 313 connected thereto; the arc-shaped baffle 314 is fixedly arranged in the arc-shaped cavity, and the arc-shaped baffle 314 divides the arc-shaped cavity into two symmetrical first arc-shaped channels 312; the first inlet 311 is located at the butt joint of one end of the two first arc-shaped channels 312, and the first outlet 313 is located at the butt joint of the other end of the two first arc-shaped channels 312. The first channel unit 31 is composed of an arc-shaped cavity and an arc-shaped baffle 314, and has a simple structure and is convenient for processing and manufacturing.

[0065] Specifically, the specific formation method of the second channel unit 32 in the reaction channel unit 30 is as follows:

[0066] Among the optional solutions of this embodiment, it is more preferred that Figures 1 to 10 As shown, the second channel unit 32 includes a columnar cavity and a spoiler column 324, the columnar cavity is provided with a second inlet 321 and a second outlet 323 connected thereto; the spoiler column 324 is fixedly arranged in the columnar cavity, and the spoiler column 324 divides the columnar cavity into two symmetrical second arc-shaped channels 322; the second inlet 321 is located at the butt joint of one end of the two second arc-shaped channels 322, and the second outlet 323 is located at the butt joint of the other end of the two second arc-shaped channels 322. The second channel unit 32 is composed of a columnar cavity and a spoiler column 324, and has a simple structure and is convenient for processing and manufacturing.

[0067] Among them, about the end setting of microchannel reactor 100:

[0068] Among the optional solutions of this embodiment, it is more preferred that Figure 1 As shown, in the flow direction of the fluid medium, the last branch reaction channel group 20 is connected to a reaction liquid outlet 40 at one end thereof. The reaction liquid outlet 40 is provided to facilitate the directional and stable discharge of the final fluid medium.

[0069] Among them, regarding other related instructions:

[0070] Specifically, the microchannel reactor 100 provided in this embodiment introduces two streams of material through the premixing device 10, and the viscous liquid is premixed and then enters the reactor body (i.e., a whole composed of multiple branch reaction channel groups 20), so that the reactants are mixed more evenly. Its reaction channel is composed of the first channel unit 31 and the second channel unit 32 alternating with each other (inspired by the movement of an octopus), thereby changing the movement state of the fluid medium in the channel, reducing the influence of the viscosity of the reaction fluid, reducing the viscous resistance of the fluid, and improving the flow efficiency of the fluid. It is suitable for viscous liquid reactions, so that the materials can reach a better mixing state, improve the mass transfer and heat transfer effect of the fluid, and increase the reaction speed.

[0071] Currently, three shapes and size settings of the reaction channel unit 30 are provided, as follows:

[0072] The first reaction channel unit 30, such as Figure 2 to Figure 4 As shown, the width W1 is 4 to 10 mm, the height H1 is 2 to 6 mm; the width W2 is 6 to 14 mm, the height H2 is 4 to 8 mm, and the channel thickness is 10 to 50 mm;

[0073] The second reaction channel unit 30, such as Figure 5 to Figure 7 As shown, the width W1 is 2 to 8 mm, the height H1 is 4 to 8 mm; the width W2 is 8 to 16 mm, the height H2 is 2 to 6 mm, and the channel thickness is 10 to 50 mm;

[0074] The third reaction channel unit 30, such as Figure 8 to Figure 10 As shown, the width W1 is 6 to 12 mm, the height H1 is 1 to 3 mm; the width W2 is 8 to 16 mm, the height H2 is 1 to 4 mm, and the channel thickness is 10 to 50 mm.

[0075] The present invention uses specific examples to illustrate the principle and implementation of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A microchannel reactor, characterized in that: It comprises a plurality of reaction channel units, each of which is connected in sequence; The reaction channel unit includes a first channel unit and a second channel unit; The first channel unit has a first inlet, at least two first arc-shaped channels and a first outlet, one end of each of the first arc-shaped channels is connected and communicated with the first inlet, and the other end of each of the first arc-shaped channels is connected and communicated with the first outlet; The second channel unit has a second inlet, at least two second arc-shaped channels and a second outlet, one end of each of the second arc-shaped channels is connected and communicated with the second inlet, and the other end of each of the second arc-shaped channels is connected and communicated with the second outlet; The first arc-shaped channel and the second arc-shaped channel have different curvatures, and the first outlet can be communicated with the second inlet; The second channel unit comprises a columnar cavity and a spoiler column, and the columnar cavity is provided with the second inlet and the second outlet communicating therewith; The spoiler column is fixedly arranged in the cylindrical cavity, and the spoiler column divides the cylindrical cavity into two symmetrical second arc-shaped channels; The second inlet is located at a joint of one ends of the two second arc-shaped channels, and the second outlet is located at a joint of the other ends of the two second arc-shaped channels.

2. The microchannel reactor according to claim 1, characterized in that: The first outlet is connected to and communicated with one end of the straight channel, and the other end of the straight channel is connected to and communicated with the second inlet.

3. The microchannel reactor according to claim 1, characterized in that: A plurality of connected reaction channel units form a branch reaction channel group; Two adjacent reaction channels in the branch reaction channel group are connected end to end; Each of the branch reaction channel groups is arranged in parallel; In the flow direction of the fluid medium, the second outlet at the starting end of the branch reaction channel group is connected and communicated with the second outlet at the ending end of the previous branch reaction channel group, and the first inlet at the ending end of the branch reaction channel group is connected and communicated with the first inlet at the starting end of the next branch reaction channel.

4. The microchannel reactor according to claim 1, characterized in that: The first channel unit includes an arc-shaped cavity and an arc-shaped baffle, and the arc-shaped cavity is provided with the first inlet and the first outlet communicating therewith; The arc-shaped baffle is fixedly disposed in the arc-shaped cavity, and the arc-shaped baffle divides the arc-shaped cavity into two symmetrical first arc-shaped channels; The first inlet is located at a joint of one ends of the two first arc-shaped channels, and the first outlet is located at a joint of the other ends of the two first arc-shaped channels.

5. The microchannel reactor according to claim 3, characterized in that: Also included is a premixing device; The premixing device includes a premixing tube and a mixing structure, wherein the mixing structure is arranged in the premixing tube; the inlet end of the premixing tube is used for fluid medium injection; the mixing structure is used for premixing the fluid medium; in the flow direction of the fluid medium, the outlet of the premixing tube is connected and communicated with the first inlet at the starting end of the first branch reaction channel group.

6. The microchannel reactor according to claim 5, characterized in that: The inlet end of the premixing tube has at least two material inlets.

7. The microchannel reactor according to claim 3, characterized in that: The first channel unit and the second channel unit have different sizes; On the same horizontal line, a certain first channel unit on each branch reaction channel group corresponds to a position of a second channel unit on an adjacent branch reaction channel group.

8. The microchannel reactor according to claim 3, characterized in that: Two adjacent branch reaction channel groups are connected and communicated through an arc-shaped connecting channel.

9. The microchannel reactor according to claim 3, characterized in that: In the flow direction of the fluid medium, one end of the last branch reaction channel group is connected to a reaction liquid outlet.

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