CN117732385A

CN117732385A - Micro-mixing channel with fan-shaped baffle and micro-reactor

Info

Publication number: CN117732385A
Application number: CN202311564568.1A
Authority: CN
Inventors: 朱维平; 钱旭红; 金晖; 杨彤睨; 唐一晨; 徐玉芳
Original assignee: East China University of Science and Technology
Current assignee: East China University of Science and Technology
Priority date: 2023-11-22
Filing date: 2023-11-22
Publication date: 2024-03-22

Abstract

The invention discloses a micro-mixing channel with a fan-shaped baffle plate and a micro-reactor. The micro-mixing channel comprises at least two feed inlets, at least two inlet channels, an inlet communication channel, at least two contracting-expanding mixing chambers, an outlet communication channel and a discharge outlet. The microreactor comprises at least two feed inlets, at least two inlet channels, an inlet connecting channel, at least two shrinkage-expansion mixing chamber assemblies, at least one vortex mixing flow channel, an outlet communicating channel and a discharge outlet. The structure of the convergent-divergent mixing chamber disrupts the laminar flow of the fluids, creating secondary and vortex flows to promote mixing of the two fluids. The fan-shaped baffle plate repeatedly stretches and folds the fluid in a form of continuously separating and recombining the fluid, so that vortex generation is promoted, and the mixing effect is enhanced.

Description

Micro-mixing channel with fan-shaped baffle and micro-reactor

Technical Field

The invention belongs to the field of microreactors, and particularly relates to a micro-mixing channel with a fan-shaped baffle plate and a microreactor.

Background

Microreactors are miniaturized reactors, typically having dimensions on the order of micrometers to millimeters, for performing physical and chemical reactions on a microscopic scale. Conventional reactors are typically large, requiring large amounts of reagents and long reaction times. This makes the monitoring and control of the reaction process complex and time consuming. Microreactors have smaller volumes, larger specific surface areas, faster reaction rates and better temperature control than conventional reactors. It has emerged to meet the need for precise control and rapid optimization of the reaction process in laboratory or industrial production.

The microreactor has the characteristics of small size, large specific surface area, rapid mass and heat transfer, high reaction efficiency and the like. Since the flow rate of the reactants in the microreactor is faster, the collision frequency between reactant molecules increases, thereby increasing the reaction rate. In addition, the microreactor can realize rapid mixing and uniform temperature control, and is beneficial to improving the selectivity and yield of the reaction.

The microreactor has wide application prospect in the fields of organic synthesis, drug research and development, catalytic reaction and the like. Due to its small size and high efficiency, the microreactor can achieve high throughput reactions and save the amounts of reactants and solvents. Furthermore, microreactors can be studied in the laboratory and produced in continuous flow processes in industrial production.

The width of the channels in the existing microreactors is usually constant, collisions between fluids are to be enhanced, and mixing effect and reaction efficiency are to be improved.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a micro-mixing channel with a fan-shaped baffle and a micro-reactor, which have the advantages of simple structure, convenient processing and wide application range. The micro-mixing channel and the micro-reactor of the invention can increase collision between fluids, strengthen mixing effect and improve reaction efficiency by continuously changing channel width and adding the fan-shaped baffle plates in the fluid flow path. The micro-mixing channel and the micro-reactor of the invention realize the full mixing of fluid media and the efficient physical or chemical reaction.

Specifically, one aspect of the present invention provides a micro-mixing channel with fan-shaped baffles, the micro-mixing channel comprises at least two feed inlets, at least two inlet channels, one inlet communication channel, at least two shrinkage-expansion mixing chambers, one outlet communication channel and one discharge outlet, the inlet channels are in one-to-one correspondence with the feed inlets, each feed inlet is connected with each inlet channel, each inlet channel is connected with the inlet communication channel, one fan-shaped baffle is arranged in each shrinkage-expansion mixing chamber, each shrinkage-expansion mixing chamber is sequentially connected, the inlet communication channel is connected with the first shrinkage-expansion mixing chamber, the last shrinkage-expansion mixing chamber is connected with the outlet communication channel, and the outlet communication channel is connected with the discharge outlet.

In one or more embodiments, the feed opening has a width of 0.1 to 2mm and a depth of 0.1 to 2mm.

In one or more embodiments, the inlet channel has a width of 0.1-2mm, a depth of 0.1-2mm, and a length of 3-10mm.

In one or more embodiments, the inlet communication channel has a width of 0.1-2mm, a depth of 0.1-2mm, and a length of 2-15mm.

In one or more embodiments, the constriction-expansion mixing chamber has a maximum width of 1.5 to 6mm, a depth of 0.1 to 2mm, and a length of 4 to 10mm.

In one or more embodiments, the scalloped baffles have a maximum width of 0.1-2.5mm, a depth of 0.1-2mm, and a length of 2-5mm.

In one or more embodiments, the outlet communication channel has a width of 0.1-2mm, a depth of 0.1-2mm, and a length of 3-15mm.

In one or more embodiments, the outlet has a width of 0.1 to 2mm and a depth of 0.1 to 2mm.

In one or more embodiments, the number of inlet channels is 2.

In one or more embodiments, the angle between the two inlet channels is 45 ° -120 °, such as 60 °, 90 °.

In one or more embodiments, two adjacent convergent-divergent mixing chambers are directly connected.

In one or more embodiments, the number of the convergent-divergent mixing chambers is 5 to 25, such as 10 to 20.

In one or more embodiments, the converging-diverging mixing chamber has two arcuate sidewalls, an inlet, and an outlet.

In one or more embodiments, the width of the central portion of the convergent-divergent mixing chamber is greater than the width of the inlet and outlet ends.

In one or more embodiments, the sides of the scallop plate are comprised of two planar surfaces and one arcuate surface.

In one or more embodiments, the fan-shaped baffle has a side surface in which the apex of the angle of the two planes faces the inlet of the convergent-divergent mixing chamber and the curved surface faces the outlet of the convergent-divergent mixing chamber, or a side surface facing the inlet of the convergent-divergent mixing chamber and the apex of the angle of the two planes faces the outlet of the convergent-divergent mixing chamber.

In one or more embodiments, the micro-hybrid channel is fabricated using etching, MEMS (microelectromechanical system) fabrication process, 3D printing, machining, or ultrafast laser machining process.

In one or more embodiments, the micro-mixing channel has a unitary structure;

preferably, the material of the micro-mixing channel is selected from one or more of borosilicate glass, quartz glass, acrylonitrile-butadiene-styrene copolymer, polyamide, polybutylene terephthalate, polyethylether and polymethyl methacrylate.

In one or more embodiments, the micro-mixing channel has a split structure;

preferably, the micro-mixing channel comprises an upper cover plate and a lower base plate, the upper cover plate being connected with the lower base plate to form respective flow channels and chambers, for example, the upper cover plate being connected with the lower base plate to close the respective flow channels and chambers of the upper cover plate;

Preferably, the upper cover plate is made of one or more of borosilicate glass, quartz glass, acrylonitrile-butadiene-styrene copolymer, polyamide, polybutylene terephthalate, diethyl ether and polymethyl methacrylate;

preferably, the upper cover plate is prepared by etching, MEMS manufacturing process, 3D printing, machining or ultrafast laser processing process;

preferably, the material of the lower bottom plate is one or more of borosilicate glass, quartz glass, acrylonitrile-butadiene-styrene copolymer, polyamide, polybutylene terephthalate, polyethylether and polymethyl methacrylate.

In another aspect, the present invention provides a microreactor with fan-shaped baffles, where the microreactor includes at least two feed inlets, at least two inlet channels, an inlet connecting channel, at least two contracting-expanding mixing chamber assemblies, at least one vortex mixing channel, an outlet communication channel and a discharge port, the inlet channels are in one-to-one correspondence with the feed inlets, each feed inlet is connected to each inlet channel, each inlet channel is connected to the inlet communication channel, each contracting-expanding mixing chamber assembly includes at least two sequentially connected contracting-expanding mixing chambers, each contracting-expanding mixing chamber assembly is connected through the vortex mixing channel, one fan-shaped baffle is disposed in each contracting-expanding mixing chamber, the inlet communication channel is connected to the first contracting-expanding mixing chamber, the last contracting-expanding mixing chamber is connected to the outlet communication channel, and the outlet communication channel is connected to the discharge port.

In one or more embodiments, the vortex mixing channel has a width of 0.1 to 2mm, a depth of 0.1 to 2mm, and a length of 8 to 20mm.

In one or more embodiments, the number of inlet channels is 2.

In one or more embodiments, in each combination of convergent-divergent mixing chambers, two adjacent convergent-divergent mixing chambers are directly connected.

In one or more embodiments, the number of the convergent-divergent mixing chambers in each convergent-divergent mixing chamber assembly is 5 to 25, such as 10 to 20.

In one or more embodiments, the number of the convergent-divergent mixing chamber combinations is 5 to 10.

In one or more embodiments, the side surface of the fan-shaped baffle plate is composed of two planes and one cambered surface, wherein in the side surface of the fan-shaped baffle plate, the vertex of the included angle of the two planes faces the inlet of the contraction-expansion mixing chamber, and the cambered surface faces the outlet of the contraction-expansion mixing chamber, or the cambered surface faces the inlet of the contraction-expansion mixing chamber, and the vertex of the included angle of the two planes faces the outlet of the contraction-expansion mixing chamber.

In one or more embodiments, each of the constriction-expansion mixing chamber assemblies is arranged in parallel and in a roundabout manner, the head and tail of the latter constriction-expansion mixing chamber assembly being aligned with the tail and head of the former constriction-expansion mixing chamber assembly, respectively, and the vortex mixing flow path being circular arc-shaped.

In one or more embodiments, the microreactor is fabricated using etching, MEMS fabrication processes, 3D printing, machining, or ultrafast laser processing processes.

In one or more embodiments, the microreactor has a monolithic structure;

preferably, the material of the microreactor is selected from one or more of borosilicate glass, quartz glass, acrylonitrile-butadiene-styrene copolymer, polyamide, polybutylene terephthalate, polyethylether and polymethyl methacrylate.

In one or more embodiments, the microreactor has a split structure;

preferably, the micro-mixing channel or the micro-reactor comprises an upper cover plate and a lower base plate, the upper cover plate being connected with the lower base plate to form respective flow channels and chambers, e.g. the upper cover plate being connected with the lower base plate to close the respective flow channels and chambers of the upper cover plate;

Preferably, the material of the lower bottom plate is one or more of borosilicate glass, quartz glass, acrylonitrile-butadiene-styrene copolymer, polyamide, polybutylene terephthalate, polyethylether and polymethyl methacrylate;

preferably, the upper cover plate is prepared by etching, MEMS manufacturing process, 3D printing, machining or ultrafast laser processing process.

The invention has the following beneficial technical effects:

1. the contraction-expansion mixing chamber can squeeze and stretch fluid, so that laminar flow of the fluid is destroyed, secondary flow and vortex are formed in the micro-channel, and the mixing effect is remarkably improved.

2. When the fluid flows through the fan-shaped baffle plates, the fluid is tangentially mixed for a plurality of times between the baffle plates, so that the efficient mixing effect is realized. Meanwhile, the flow speed and direction of the fluid can be adjusted through the design of the baffle plate, and the mixing effect is further enhanced.

3. The micro-mixing channel and the micro-reactor of the invention have strong expandability, and the fan-shaped baffle structure in the micro-channel can be expanded and changed according to the requirement. The number and the spacing of the baffles can be increased, and the shape and the size of the baffles can be changed to adapt to different mixing requirements.

Drawings

FIG. 1 is a two-dimensional schematic of a micromixing channel having scallops in some embodiments of the invention.

Fig. 2 is an enlarged partial view of a micromixing unit having a fan-shaped baffle micromixing channel in some embodiments of the invention.

Fig. 3 is a three-dimensional schematic of a micromixing channel having scallops in some embodiments of the invention.

FIG. 4 is a simulation of COMSOL of a micro-mixing channel with scallops in example 6 of the present invention.

Fig. 5 is a velocity flow line simulation of a micro-mixing unit having a fan-shaped baffle micro-mixing channel in example 7 of the present invention.

FIG. 6 is a two-dimensional schematic of a microreactor with scallops in some embodiments of the invention.

FIG. 7 is a pictorial view of a microreactor with scallops in accordance with some embodiments of the present invention.

In the drawings, like parts are designated with like reference numerals. The figures are not drawn to scale.

The reference numerals are explained as follows: 1 is a first feed inlet, 2 is a second feed inlet, 3 is an inlet channel, 4 is an inlet communication channel, 5 is a shrinkage-expansion mixing chamber, 6 is a fan-shaped baffle, 7 is an outlet communication channel, 8 is a discharge outlet, and 9 is a vortex mixing flow channel.

Detailed Description

So that those skilled in the art can appreciate the features and effects of the present invention, a general description and definition of the terms and expressions set forth in the specification and claims follows. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, and in the event of a conflict, the present specification shall control.

The theory or mechanism described and disclosed herein, whether right or wrong, is not meant to limit the scope of the invention in any way, i.e., the present disclosure may be practiced without limitation to any particular theory or mechanism.

Herein, "comprising," "including," "containing," and similar terms are intended to cover the meaning of "consisting essentially of … …" and "consisting of … …," e.g., "a consisting essentially of B and C" and "a consisting of B and C" should be considered to have been disclosed herein when "a comprises B and C" is disclosed herein.

In this document, all features such as values, amounts, and concentrations that are defined as ranges of values or percentages are for brevity and convenience only. Accordingly, the description of a numerical range or percentage range should be considered to cover and specifically disclose all possible sub-ranges and individual values (including integers and fractions) within the range.

Herein, unless otherwise specified, percentages refer to mass percentages, and proportions refer to mass ratios.

Herein, when embodiments or examples are described, it should be understood that they are not intended to limit the invention to these embodiments or examples. On the contrary, all alternatives, modifications, and equivalents of the methods and materials described herein are intended to be included within the scope of the invention as defined by the appended claims.

In this context, not all possible combinations of the individual technical features in the individual embodiments or examples are described in order to simplify the description. Accordingly, as long as there is no contradiction between the combinations of these technical features, any combination of the technical features in the respective embodiments or examples is possible, and all possible combinations should be considered as being within the scope of the present specification.

Herein, the positional or positional relationship indicated by terms such as "upper", "lower", "front", "rear", "left", "right", "length", "width", "depth", etc., are keywords determined based on the positional or positional relationship shown in the drawings, for convenience of description of the structural relationship of the components or elements of the present invention only, are not specific to the specific orientation of the components or elements, the configuration and operation of the specific orientation, and thus should not be construed as limiting the present invention.

Herein, terms such as "connected," "communicating," and the like are to be construed broadly, and may be, for example, fixedly connected or integrally connected; may be directly connected or connected through an intermediate medium. It will be understood by those of ordinary skill in the art that the specific meaning of the terms above in the present invention should not be construed as limiting the invention as the case may be.

Herein, terms such as "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying a number of technical features indicated, the specific meaning of the above terms in the present invention being understood according to the specific circumstances and not to be construed as limiting the present invention.

Herein, the meaning of "several" means one or more, the meaning of "a plurality" means two or more, the meaning of "greater than", "less than", etc. is understood to not include the present number, and the meaning of "above", "below", etc. is understood to include the present number.

The medium in the micro-mixing channel and the micro-reactor of the present invention may be a gas or a liquid, and the micro-mixing channel and the micro-reactor of the present invention may be used for a physical or chemical reaction of the medium in the micro-channel.

The micro-mixing channel and the micro-reactor of the invention have three-dimensional structures and are flat as a whole.

In the present invention, each of the components of the micro-mixing channel and the micro-reactor has a top surface and a bottom surface. The top and bottom surfaces of the same component are parallel to each other. In the present invention, the depth of each member means the distance between the top surface and the bottom surface of each member, the length of each member means the maximum dimension of each member in the overall flow direction of the material, and the width of each member means the dimension of each member in the direction perpendicular to the overall flow direction of the material and parallel to the top surface and the bottom surface.

Fig. 1 is a two-dimensional schematic of a micro-mixing channel viewed along the depth of the micro-mixing channel in some embodiments of the invention. Fig. 2 is a two-dimensional schematic of a micro-mixing unit in a micro-mixing channel, as viewed along the depth of the micro-mixing channel, in some embodiments of the invention. Fig. 3 is a three-dimensional schematic and a partially enlarged schematic illustration of a micro-mixing channel in some embodiments of the invention. FIG. 6 is a two-dimensional schematic of a microreactor viewed along its depth in some embodiments of the invention.

In the present invention, the width of the feed inlet may be 0.1 to 2mm, for example 0.2mm, 0.5mm, 1mm, 1.5mm.

In the present invention, the depth of the feed opening may be 0.1-2mm, for example 0.2mm, 0.5mm, 1mm, 1.5mm.

In the present invention, the width of the inlet channel may be 0.1-2mm, e.g. 0.2mm, 0.5mm, 1mm, 1.5mm.

In the present invention, the depth of the inlet channel may be 0.1-2mm, for example 0.2mm, 0.5mm, 1mm, 1.5mm.

In the present invention, the length of the inlet channel may be 3-10mm, for example 5mm, 8mm.

In the present invention, the width of the inlet communication passage may be 0.1 to 2mm, for example, 0.2mm, 0.5mm, 1mm, 1.5mm.

In the present invention, the depth of the inlet communication passage may be 0.1 to 2mm, for example 0.2mm, 0.5mm, 1mm, 1.5mm.

In the present invention, the length of the inlet communication passage may be 2 to 15mm, for example, 4mm, 6mm, 8mm, 10mm, 12mm.

In the present invention, the maximum width of the constriction-expansion mixing chamber may be 1.5-6mm, for example 2mm, 2.5mm, 3mm, 4mm, 5mm.

In the present invention, the depth of the convergent-divergent mixing chamber may be 0.1-2mm, for example 0.2mm, 0.5mm, 1mm, 1.5mm.

In the present invention, the length of the constriction-expansion mixing chamber may be 4-10mm, for example 5mm, 5.6mm, 6mm, 8mm.

In the present invention, the maximum width of the fan baffle may be 0.1-2.5mm, for example 0.2mm, 0.5mm, 1mm, 1.2mm, 1.5mm, 2mm.

In the present invention, the depth of the scallop baffles may be 0.1-2mm, such as 0.2mm, 0.5mm, 1mm, 1.5mm.

In the present invention, the length of the fan baffle may be 2-5mm, for example 2.2mm, 3mm, 4mm.

In the present invention, the width of the outlet communication passage may be 0.1 to 2mm, for example, 0.2mm, 0.5mm, 1mm, 1.5mm.

In the present invention, the depth of the outlet communication channel may be 0.1-2mm, for example 0.2mm, 0.5mm, 1mm, 1.5mm.

In the present invention, the length of the outlet communication passage may be 3 to 15mm, for example, 4mm, 6mm, 8mm, 10mm, 12mm.

In the present invention, the width of the outlet may be 0.1-2mm, for example 0.2mm, 0.5mm, 1mm, 1.5mm.

In the present invention, the depth of the outlet may be 0.1-2mm, for example 0.2mm, 0.5mm, 1mm, 1.5mm.

In some embodiments, the depth of each inlet channel, inlet communication channel, each convergent-divergent mixing chamber, each scallop baffle, and outlet communication channel is the same in the micro-mixing channels of the present invention.

In some embodiments, the depth of each feed port, each inlet port, inlet communication channel, each convergent-divergent mixing chamber, each scallop baffle, outlet communication channel, and outlet port in the micro-mixing channel of the present invention is the same.

The number of constriction-expansion mixing chambers in the micro-mixing channel of the invention may be 5-25, for example 8, 10, 12, 15, 20, 22.

In the microreactor of the invention, the width of the vortex mixing flow channel may be 0.1-2mm, for example 0.2mm, 0.5mm, 1mm, 1.5mm.

In the microreactor of the invention, the depth of the vortex mixing flow channel may be 0.1-2mm, for example 0.2mm, 0.5mm, 1mm, 1.5mm.

In the microreactor of the invention, the length of the vortex mixing flow channel may be 8-20mm, for example 10mm, 12mm, 15mm, 18mm.

In some embodiments, the depth of each inlet channel, inlet communication channel, each constriction-expansion mixing chamber, each scallop baffle, each vortex mixing channel, and outlet communication channel is the same in the microreactor of the present invention.

In some embodiments, the depth of each feed port, each inlet channel, inlet communication channel, each convergent-divergent mixing chamber, each sector baffle, each vortex mixing channel, outlet communication channel, and discharge port is the same in the microreactor of the present invention.

In the microreactor of the present invention, the number of the contraction-expansion mixing chambers in each contraction-expansion mixing chamber combination is 5 to 25, for example 8, 10, 12, 15, 20, 22.

The number of the constriction-expansion mixing chamber combinations in the microreactor of the invention can be 5 to 10, for example 6, 7, 8, 9.

In the present invention, the convergent-divergent mixing chamber has an inlet and an outlet.

The invention is characterized in that a fan-shaped baffle plate is arranged in each shrinkage-expansion mixing chamber in the micro-mixing channel and the micro-reactor. A micro-mixing unit is formed by a contraction-expansion mixing chamber and a fan-shaped baffle plate arranged in the mixing chamber. The depth of the contraction-expansion mixing chamber is the same as the depth of the sector baffle plate arranged in the contraction-expansion mixing chamber, namely, the bottom surface and the top surface of the sector baffle plate are respectively clung to the bottom surface and the top surface of the contraction-expansion mixing chamber. The length and width of the contracting-expanding mixing chamber are respectively greater than the length and width of the sector-shaped baffle plate arranged in the contracting-expanding mixing chamber. The fan-shaped baffle is disposed in the middle of the bottom surface or the top surface of the convergent-divergent mixing chamber to ensure that the inlet and outlet of the convergent-divergent mixing chamber are not closed and that a flow path exists between the side surfaces of the fan-shaped baffle and the arc-shaped side walls of the convergent-divergent mixing chamber. The contracting-expanding mixing chamber and the sector baffle arranged in the contracting-expanding mixing chamber can have an integrated structure, namely, the contracting-expanding mixing chamber and the sector baffle arranged in the contracting-expanding mixing chamber are integrated. The contraction-expansion mixing chamber and the fan-shaped baffle plate arranged in the contraction-expansion mixing chamber can also have a split structure, for example, the contraction-expansion mixing chamber can be formed by connecting an upper cover plate and a lower base plate, and the fan-shaped baffle plate can be integrally formed with the upper cover plate or the lower base plate of the contraction-expansion mixing chamber and then connected with the lower base plate or the upper cover plate of the contraction-expansion mixing chamber.

In some preferred embodiments, the converging-diverging mixing chamber has two arcuate sidewalls, the converging-diverging mixing chamber having a central portion with a width greater than the widths of the inlet and outlet ends, the converging-diverging mixing chamber being configured to form a converging-diverging main channel structure designed in response to the expanding vortices generated when the cross-sectional area increases abruptly. In this contraction-expansion mixing chamber, the fluid in the micro-channel is repeatedly stretched and folded, a vortex is generated inside the channel, and a state of laminar flow is broken, thereby enhancing fluid mixing. In the present invention, the fact that the contraction-expansion mixing chamber has two arc-shaped side walls means that both sides of the contraction-expansion mixing chamber are arc-shaped when the contraction-expansion mixing chamber is viewed in the depth direction. The two arc-shaped side walls are arranged oppositely and are not connected, so that an inlet and an outlet are formed at two ends of the two arc-shaped side walls respectively.

In the invention, the fan-shaped baffle plate refers to a baffle plate which is fan-shaped when the baffle plate is observed along the depth direction. In some preferred embodiments, the sides of the scalloped baffle are comprised of two planar surfaces and one arcuate surface, i.e., the contour of the baffle when the baffle is viewed in the depth direction is a scallop comprised of two straight lines and one arc. More preferably, in the sides of the sector-shaped baffle, the apex of the angle of the two planes is directed towards the inlet of the convergent-divergent mixing chamber and the cambered surface is directed towards the outlet of the convergent-divergent mixing chamber, or the cambered surface is directed towards the inlet of the convergent-divergent mixing chamber and the apex of the angle of the two planes is directed towards the outlet of the convergent-divergent mixing chamber. The baffle is arranged in the micro-channel, so that the chaotic flow is generated when the fluid flows in the micro-channel, thereby promoting the rapid and effective mixing of different fluids and enhancing the mass transfer effect. In addition, the multiple splitting and merging of fluids increases the contact area between the fluids, promoting fluid mixing. As the split fluid exits the sub-channels, collisions between the various split fluids may also occur, which may facilitate fluid mixing. The addition of conventional baffles to the microchannels typically results in a sharp rise in pressure drop with concomitant formation of dead zones within the microchannels. The fan-shaped baffle used in the invention can ensure high mixing performance and low pressure drop, and can effectively reduce the formation of dead zones in the micro-channels.

In the present invention, the position of the fan-shaped baffle in the convergent-divergent mixing chamber is adjustable.

In the present invention, the vortex mixing flow channel has an inlet and an outlet. In some embodiments, the vortex mixing channel is arcuate. The arc-shaped vortex mixing flow passage means that the vortex mixing flow passage is arc-shaped as a whole when being observed in the depth direction. In some embodiments, the angle between the vortex mixing channel inlet and outlet is 180 °, i.e. the inlet and outlet are oriented opposite.

The invention will be illustrated by way of specific examples. It should be understood that these examples are illustrative only and are not intended to limit the scope of the invention. The methods, reagents and materials used in the examples are those conventional in the art unless otherwise indicated. The starting compounds in the examples are all commercially available.

Example 1: micro-mixing channel

As shown in fig. 1 and 3, the micro-mixing channel with a fan-shaped baffle plate of the present embodiment includes a first inlet port 1, a second inlet port 2, two inlet channels 3 (a first inlet channel and a second inlet channel), an inlet communication channel 4, 17 contraction-expansion mixing chambers 5, a fan-shaped baffle plate 6, an outlet communication channel 7, and a discharge port 8. The first feed opening 1 and the second feed opening 2 are connected to a first inlet channel and a second inlet channel, respectively. The first inlet passage and the second inlet passage communicate with the head end of the inlet communication passage 4. The tail end of the inlet communication passage 4 communicates with the head convergent-divergent mixing chamber 5. The inner wall of the contraction-expansion mixing chamber 5 has an arc-shaped structure. Each of the contraction-expansion mixing chambers 5 is provided with 1 fan-shaped baffle 6. The respective constriction-expansion mixing chambers 5 are in communication in sequence. The last convergent-divergent mixing chamber 5 is in sequential communication with an outlet communication channel 7 and a discharge outlet 8.

When it is difficult to accomplish rapid mixing of fluids to be mixed, it is necessary to improve the mixing performance of the micromixer, and by appropriately increasing the number of micromixer units, the fluids can be divided and joined multiple times in the microchannel, thereby improving the fluid mixing efficiency. As shown in fig. 2, a micro-mixing unit consists of a convergent-divergent mixing chamber 5 and a fan-shaped baffle 6. The number of micro-mixing units in example 1 was 17.

In this embodiment, the width of the first feed opening 1 is 1mm and the depth is 1mm. The width of the second feed inlet 2 is 1mm and the depth is 1mm. The inlet channel 3 has a width of 1mm, a length of 5mm and a depth of 1mm. The angle between the first inlet channel and the second inlet channel is 90 °. The inlet communication passage 4 has a width of 1mm, a length of 2mm, and a depth of 1mm.

In this embodiment, the convergent-divergent mixing chamber 5 has two curved side walls, an inlet and an outlet. Fluid flows into the convergent-divergent mixing chamber 5 from the inlet of the convergent-divergent mixing chamber 5 and flows out of the convergent-divergent mixing chamber 5 from the outlet of the convergent-divergent mixing chamber 5. The width of the two ends (inlet and outlet ends) of the convergent-divergent mixing chamber 5 is smaller than the width of the middle part. The maximum width of the convergent-divergent mixing chamber 5 is 3mm, the length is 6mm and the depth is 1mm.

In this embodiment, a fan-shaped baffle 6 is provided in the contracting-expanding mixing chamber 5. The maximum width of the fan-shaped baffle 6 is 2mm, the length is 4mm, and the depth is 1mm. The side surface of the fan-shaped baffle 6 consists of two planes and an arc surface. The top of the included angle between the two planes in the side surface of the fan-shaped baffle plate 6 faces to the inlet of the shrinkage-expansion mixing chamber 5, the middle cambered surface of the side surface of the fan-shaped baffle plate 6 faces to the outlet of the shrinkage-expansion mixing chamber 5, namely the head part of the fan-shaped baffle plate 6 presents a sharp angle, and the tail part presents an arc shape. The fan-shaped baffle 6 is generally narrower near the inlet of the convergent-divergent mixing chamber 5 and wider near the outlet of the convergent-divergent mixing chamber 5.

In this embodiment, the outlet communication passage 7 has a width of 1mm, a length of 3mm, and a depth of 1mm. The width of the discharge hole 8 is 1mm, and the depth is 1mm.

In a specific application, two fluids respectively flow in from the first feed inlet 1 and the second feed inlet 2, and as the fluids are in a laminar flow state, the two fluids are not mixed basically in the inlet communication channel 4; subsequently, the two fluids enter the micro-mixing unit, the structure of the contraction-expansion mixing chamber 5 can squeeze and stretch the fluids, so that laminar flow of the fluids is broken, secondary flow and vortex flow are formed in the micro-channels, the fan-shaped baffle 6 separates the fluids, then the fluids flow through the channels at two sides, and the fluids are combined again at the tail parts of the fan-shaped baffle 6; by separating the reconstituted fluid multiple times, the fluid may be repeatedly stretched, cut, and stacked, enhancing mixing of the two-phase fluid. Finally, the fluid flows out of the contracting-expanding mixing chamber 5, flows into the outlet communication channel 7, and completes mixing at the discharge port 8.

Example 2: micro-mixing channel

As shown in fig. 1 and 3, the micro-mixing channel with a fan-shaped baffle plate of the present embodiment includes a first inlet port 1, a second inlet port 2, two inlet channels 3 (a first inlet channel and a second inlet channel), an inlet communication channel 4, 10 contraction-expansion mixing chambers 5, a fan-shaped baffle plate 6, an outlet communication channel 7, and a discharge port 8. The first feed opening 1 and the second feed opening 2 are connected to a first inlet channel and a second inlet channel, respectively. The first inlet passage and the second inlet passage communicate with the head end of the inlet communication passage 4. The tail end of the inlet communication passage 4 communicates with the head convergent-divergent mixing chamber 5. The inner wall of the contraction-expansion mixing chamber 5 has an arc-shaped structure. Each of the contraction-expansion mixing chambers 5 is provided with 1 fan-shaped baffle 6. The respective constriction-expansion mixing chambers 5 are in communication in sequence. The last convergent-divergent mixing chamber 5 is in sequential communication with an outlet communication channel 7 and a discharge outlet 8.

When it is difficult to accomplish rapid mixing of fluids to be mixed, it is necessary to improve the mixing performance of the micromixer, and by appropriately increasing the number of micromixer units, the fluids can be divided and joined multiple times in the microchannel, thereby improving the fluid mixing efficiency. As shown in fig. 2, a micro-mixing unit consists of a convergent-divergent mixing chamber 5 and a fan-shaped baffle 6. The number of micro-mixing units in example 2 was 10 (instead of 17 as presented in fig. 1 and 3).

In this embodiment, the width of the first feed opening 1 is 2mm and the depth is 2mm. The inlet 2 for the second fluid has a width of 2mm and a depth of 2mm. The inlet channel 3 has a width of 2mm, a length of 5mm and a depth of 2mm. The angle between the first inlet channel and the second inlet channel is 90 °. The inlet communication passage 4 has a width of 2mm, a length of 2mm, and a depth of 2mm.

In this embodiment, the convergent-divergent mixing chamber 5 has two curved side walls, an inlet and an outlet. Fluid flows into the convergent-divergent mixing chamber 5 from the inlet of the convergent-divergent mixing chamber 5 and flows out of the convergent-divergent mixing chamber 5 from the outlet of the convergent-divergent mixing chamber 5. The width of the two ends (inlet and outlet ends) of the convergent-divergent mixing chamber 5 is smaller than the width of the middle part. The maximum width of the convergent-divergent mixing chamber 5 is 3mm, the length is 6mm and the depth is 2mm.

In this embodiment, a fan-shaped baffle 6 is provided in the contracting-expanding mixing chamber 5. The maximum width of the fan-shaped baffle 6 is 1.5mm, the length is 4mm, and the depth is 2mm. The side surface of the fan-shaped baffle 6 consists of two planes and an arc surface. The apex of the angle between the two planes in the sides of the sector-shaped baffle 6 is directed towards the inlet of the convergent-divergent mixing chamber 5. The middle cambered surface of the side surface of the fan-shaped baffle plate 6 faces to the outlet of the shrinkage-expansion mixing chamber 5, namely, the head part of the fan-shaped baffle plate 6 presents a sharp angle, and the tail part presents an arc shape. The fan-shaped baffle 6 is generally narrower near the inlet of the convergent-divergent mixing chamber 5 and wider near the outlet of the convergent-divergent mixing chamber 5.

In this embodiment, the outlet communication channel 7 has a width of 2mm, a length of 3mm, and a depth of 2mm. The width of the discharge hole 8 is 2mm, and the depth is 2mm.

Example 3: micro-mixing channel

In this embodiment, the width of the first feed opening 1 is 0.5mm and the depth is 0.5mm. The width of the second feed inlet 2 was 0.5mm and the depth was 0.5mm. The inlet channel 3 has a width of 0.5mm, a length of 5mm and a depth of 1.5mm. The angle between the first inlet channel and the second inlet channel is 120 °. The inlet communication passage 4 has a width of 1mm, a length of 2mm, and a depth of 1.5mm.

In this embodiment, the convergent-divergent mixing chamber 5 has two curved side walls, an inlet and an outlet. Fluid flows into the convergent-divergent mixing chamber 5 from the inlet of the convergent-divergent mixing chamber 5 and flows out of the convergent-divergent mixing chamber 5 from the outlet of the convergent-divergent mixing chamber 5. The width of the two ends (inlet and outlet ends) of the convergent-divergent mixing chamber 5 is smaller than the width of the middle part. The maximum width of the convergent-divergent mixing chamber 5 is 2mm, the length is 6mm and the depth is 1.5mm.

In this embodiment, a fan-shaped baffle 6 is provided in the contracting-expanding mixing chamber 5. The maximum width of the fan-shaped baffle 6 is 1.5mm, the length is 4mm, and the depth is 1.5mm. The side surface of the fan-shaped baffle 6 consists of two planes and an arc surface. The apex of the angle between the two planes in the sides of the sector-shaped baffle 6 is directed towards the inlet of the convergent-divergent mixing chamber 5. The middle cambered surface of the side surface of the fan-shaped baffle plate 6 faces to the outlet of the shrinkage-expansion mixing chamber 5, namely, the head part of the fan-shaped baffle plate 6 presents a sharp angle, and the tail part presents an arc shape. The fan-shaped baffle 6 is generally narrower near the inlet of the convergent-divergent mixing chamber 5 and wider near the outlet of the convergent-divergent mixing chamber 5.

In this embodiment, the outlet communication channel 7 has a width of 1mm, a length of 3mm, and a depth of 1.5mm. The width of the discharge hole 8 is 1mm, and the depth is 1.5mm.

Example 4: micro-mixing channel

In this embodiment, the width of the first feed opening 1 is 2mm and the depth is 1mm. The width of the second feed inlet 2 is 2mm and the depth is 1mm. The inlet channel 3 has a width of 2mm, a length of 5mm and a depth of 1mm. The angle between the first inlet channel and the second inlet channel is 90 °. The inlet communication passage 4 has a width of 2mm, a length of 2mm, and a depth of 1mm.

In this embodiment, the convergent-divergent mixing chamber 5 has two curved side walls, an inlet and an outlet. Fluid flows into the convergent-divergent mixing chamber 5 from the inlet of the convergent-divergent mixing chamber 5 and flows out of the convergent-divergent mixing chamber 5 from the outlet of the convergent-divergent mixing chamber 5. The width of the two ends (inlet and outlet ends) of the convergent-divergent mixing chamber 5 is smaller than the width of the middle part. The maximum width of the convergent-divergent mixing chamber 5 is 2.5mm, the length is 5.6mm and the depth is 1mm.

In this embodiment, a fan-shaped baffle 6 is provided in the contracting-expanding mixing chamber 5. The maximum width of the fan-shaped baffle 6 is 1mm, the length is 2mm, and the depth is 1mm. The side surface of the fan-shaped baffle 6 consists of two planes and an arc surface. Unlike the shape presented in fig. 1 and 3, in embodiment 4, the cambered surface in the side of the sector-shaped baffle 6 faces the inlet of the contraction-expansion mixing chamber 5, and the apex of the angle between the two planes in the side of the sector-shaped baffle 6 faces the outlet of the contraction-expansion mixing chamber 5, i.e., the head of the sector-shaped baffle 6 is arc-shaped and the tail is pointed. The fan-shaped baffle 6 is wider near the inlet of the convergent-divergent mixing chamber 5 and narrower near the outlet of the convergent-divergent mixing chamber 5.

In this embodiment, the outlet communication channel 7 has a width of 2mm, a length of 3mm, and a depth of 1mm. The width of the discharge hole 8 is 2mm, and the depth is 1mm.

Example 5: micro-mixing channel

As shown in fig. 1 and 3, the micro-mixing channel with a fan-shaped baffle plate of the present embodiment includes a first inlet port 1, a second inlet port 2, two inlet channels 3 (a first inlet channel and a second inlet channel), an inlet communication channel 4, 20 contraction-expansion mixing chambers 5, a fan-shaped baffle plate 6, an outlet communication channel 7, and a discharge port 8. The first feed opening 1 and the second feed opening 2 are connected to a first inlet channel and a second inlet channel, respectively. The first inlet passage and the second inlet passage communicate with the head end of the inlet communication passage 4. The tail end of the inlet communication passage 4 communicates with the head convergent-divergent mixing chamber 5. The inner wall of the contraction-expansion mixing chamber 5 has an arc-shaped structure. Each of the contraction-expansion mixing chambers 5 is provided with 1 fan-shaped baffle 6. The respective constriction-expansion mixing chambers 5 are in communication in sequence. The last convergent-divergent mixing chamber 5 is in sequential communication with an outlet communication channel 7 and a discharge outlet 8.

When it is difficult to accomplish rapid mixing of fluids to be mixed, it is necessary to improve the mixing performance of the micromixer, and by appropriately increasing the number of micromixer units, the fluids can be divided and joined multiple times in the microchannel, thereby improving the fluid mixing efficiency. As shown in fig. 2, a micro-mixing unit consists of a convergent-divergent mixing chamber 5 and a fan-shaped baffle 6. The number of micro-mixing units in example 5 was 20 (instead of 17 as presented in fig. 1 and 3).

In this embodiment, the width of the first feed opening 1 is 0.5mm and the depth is 0.5mm. The width of the second feed inlet 2 was 0.5mm and the depth was 0.5mm. The inlet channel 3 has a width of 0.5mm, a length of 5mm and a depth of 0.5mm. The angle between the first inlet channel and the second inlet channel is 120 °. The inlet communication passage 4 has a width of 0.5mm, a length of 2mm, and a depth of 0.5mm.

In this embodiment, the convergent-divergent mixing chamber 5 has two curved side walls, an inlet and an outlet. Fluid flows into the convergent-divergent mixing chamber 5 from the inlet of the convergent-divergent mixing chamber 5 and flows out of the convergent-divergent mixing chamber 5 from the outlet of the convergent-divergent mixing chamber 5. The width of the two ends (inlet and outlet ends) of the convergent-divergent mixing chamber 5 is smaller than the width of the middle part. The maximum width of the convergent-divergent mixing chamber 5 is 1.5mm, the length is 5.6mm and the depth is 0.5mm.

In this embodiment, a fan-shaped baffle 6 is provided in the contracting-expanding mixing chamber 5. The maximum width of the fan-shaped baffle 6 is 1mm, the length is 2mm, and the depth is 0.5mm. The side surface of the fan-shaped baffle 6 consists of two planes and an arc surface. Unlike the shape presented in fig. 1 and 3, in example 5, the cambered surface in the side of the sector-shaped baffle 6 faces the inlet of the contraction-expansion mixing chamber 5, and the apex of the angle between the two planes in the side of the sector-shaped baffle 6 faces the outlet of the contraction-expansion mixing chamber 5, i.e., the head of the sector-shaped baffle 6 is arc-shaped and the tail is pointed. The fan-shaped baffle 6 is wider near the inlet of the convergent-divergent mixing chamber 5 and narrower near the outlet of the convergent-divergent mixing chamber 5.

In this embodiment, the outlet communication channel 7 has a width of 0.5mm, a length of 3mm, and a depth of 0.5mm. The width of the discharge hole 8 is 0.5mm, and the depth is 0.5mm.

Example 6: micro-mixing channel simulation

In this embodiment, a fan-shaped baffle 6 is provided in the contracting-expanding mixing chamber 5. The maximum width of the fan-shaped baffle 6 is 2mm, the length is 4mm, and the depth is 1mm. The side surface of the fan-shaped baffle 6 consists of two planes and an arc surface. Unlike the shape presented in fig. 1 and 3, in example 6, the cambered surface in the side of the sector-shaped baffle 6 faces the inlet of the contraction-expansion mixing chamber 5, and the apex of the angle between the two planes in the side of the sector-shaped baffle 6 faces the outlet of the contraction-expansion mixing chamber 5, i.e., the head of the sector-shaped baffle 6 is arc-shaped and the tail is pointed. The fan-shaped baffle 6 is wider near the inlet of the convergent-divergent mixing chamber 5 and narrower near the outlet of the convergent-divergent mixing chamber 5.

The present embodiment utilizes COMSOL software to simulate the micro-mixing channel of the present embodiment. Respectively using laminar flow and dilute materials to transfer two physical fields to perform hybrid simulation on a three-dimensional model of a micro-hybrid channel in a steady state, wherein the materials in the model are water; the concentrations of the first feed inlet 1 and the second feed inlet 2 are 0 and 1mol/m, respectively ³ The method comprises the steps of carrying out a first treatment on the surface of the At the microchannel entrance, a velocity entrance boundary condition is employed; at the microchannel outlet, a pressure outlet boundary condition is employed; on all walls except the microchannel inlet and outlet, a slip-free boundary condition is used; the density, dynamic viscosity and diffusion coefficient used in this simulation were 1000kg/m, respectively ³ 、0.001Pa·s、1×10 ^-11 m ² And/s. The degree of mixing in a micro-mixing channel is typically expressed in terms of the mass fraction of the fluid components, and the distribution of the mass fraction in the micro-mixing channel is shown in fig. 4. As can be seen from fig. 4, the fluid mixing effect is optimal after passing through 12 micro-mixing units.

Example 7: micro-mixing channel simulation

The present embodiment utilizes COMSOL software to simulate the micro-mixing channel of the present embodiment. Respectively using laminar flow and dilute materials to transfer two physical fields to perform hybrid simulation on a three-dimensional model of a micro-hybrid channel in a steady state, wherein the materials in the model are water; the concentrations of the first feed inlet 1 and the second feed inlet 2 are 0 and 1mol/m, respectively ³ The method comprises the steps of carrying out a first treatment on the surface of the At the microchannel entrance, a velocity entrance boundary condition is employed; at the microchannel outlet, a pressure outlet boundary condition is employed; on all walls except the microchannel inlet and outlet, a slip-free boundary condition is used; the density, dynamic viscosity and diffusion coefficient used in this simulation were 1000kg/m, respectively ³ 、0.001Pa·s、1×10 ^-11 m ² And/s. The degree of mixing of the micro-mixing channel is typically expressed in terms of the mass fraction of the fluid components. The velocity flow diagram in the fifth micro-mixing unit in the micro-mixing channel at different reynolds numbers (Re) is shown in fig. 5. As can be seen from fig. 5, the mixing effect is better (the color is closer to green) as the reynolds number increases, but the swirl zone in the micromixer unit at the upper and lower ends and behind the fan-shaped baffle 6 increases as the reynolds number increases.

Example 8: microreactor

As shown in fig. 6 and 7, the microreactor with a fan-shaped baffle plate of the present embodiment includes a first feed port 1, a second feed port 2, two inlet channels 3 (a first inlet channel and a second inlet channel), an inlet communication channel 4, 96 constriction-expansion mixing chambers 5, a fan-shaped baffle plate 6, an outlet communication channel 7, a discharge port 8, and a vortex mixing flow passage 9. The first feed opening 1 and the second feed opening 2 are connected to a first inlet channel and a second inlet channel, respectively. The first inlet passage and the second inlet passage communicate with the head end of the inlet communication passage 4. The tail end of the inlet communication passage 4 communicates with the contraction-expansion mixing chamber 5. The microreactor of this embodiment comprises 8 constriction-expansion mixing chamber combinations, each comprising 12 constriction-expansion mixing chambers 5. The inner wall of the contraction-expansion mixing chamber 5 has an arc-shaped structure. Each of the contraction-expansion mixing chambers 5 is provided with 1 fan-shaped baffle 6. The respective constriction-expansion mixing chambers 5 of each constriction-expansion mixing chamber combination are in turn connected. Adjacent convergent-divergent mixing chamber combinations communicate through a vortex mixing runner 9. Adjacent contraction-expansion mixing chamber assemblies are arranged in parallel in a roundabout manner, and the head and tail of the latter contraction-expansion mixing chamber assembly are aligned with the tail and head of the former contraction-expansion mixing chamber assembly, respectively. The last convergent-divergent mixing chamber 5 is in sequential communication with an outlet communication channel 7 and a discharge outlet 8.

When it is difficult to accomplish rapid mixing of fluids to be mixed, it is necessary to improve the mixing performance of the micromixer, and by appropriately increasing the number of micromixer units, the fluids can be divided and joined multiple times in the microchannel, thereby improving the fluid mixing efficiency. A micromixing unit consists of a convergent-divergent mixing chamber 5 and a fan-shaped baffle 6. As shown in fig. 6, in example 8, the micro-mixing units were distributed in a plurality of rows and in a meandering manner, and adjacent rows were communicated with each other through the vortex mixing flow passage 9. The number of rows of micro-mixing units in example 1 was 8, and the number of micro-mixing units per row was 12.

In this embodiment, the width of the first feed opening 1 is 1mm and the depth is 1mm. The width of the second feed inlet 2 is 1mm and the depth is 1mm. The inlet channel 3 has a width of 1mm, a length of 8mm and a depth of 1mm. The angle between the first inlet channel and the second inlet channel is 90 °. The inlet communication passage 4 has a width of 1mm, a length of 4mm, and a depth of 1mm.

In this embodiment, a fan-shaped baffle 6 is provided in the contracting-expanding mixing chamber 5. The maximum width of the fan-shaped baffle 6 is 1.2mm, the length is 2.2mm, and the depth is 1mm. The side surface of the fan-shaped baffle 6 consists of two planes and an arc surface. The cambered surface in the side surface of the fan-shaped baffle plate 6 faces the inlet of the shrinkage-expansion mixing chamber 5, and the vertex of the included angle between the two planes in the side surface of the fan-shaped baffle plate 6 faces the outlet of the shrinkage-expansion mixing chamber 5, namely the head part of the fan-shaped baffle plate 6 is arc-shaped, and the tail part of the fan-shaped baffle plate is sharp. The fan-shaped baffle 6 is wider near the inlet of the convergent-divergent mixing chamber 5 and narrower near the outlet of the convergent-divergent mixing chamber 5.

In this example, the vortex mixing channel 9 has a width of 1mm, a length of 15mm and a depth of 1mm. The vortex mixing channel 9 is arcuate. The angle between the inlet and outlet of the vortex mixing channel 9 is 180 °.

In this embodiment, the outlet communication passage 7 has a width of 1mm, a length of 15mm, and a depth of 1mm. The width of the discharge hole 8 is 1mm, and the depth is 1mm.

Example 9: microreactor

In this embodiment, the convergent-divergent mixing chamber 5 has two curved side walls, an inlet and an outlet. Fluid flows into the convergent-divergent mixing chamber 5 from the inlet of the convergent-divergent mixing chamber 5 and flows out of the convergent-divergent mixing chamber 5 from the outlet of the convergent-divergent mixing chamber 5. The width of the two ends (inlet and outlet ends) of the convergent-divergent mixing chamber 5 is smaller than the width of the middle part. The maximum width of the constriction-expansion mixing chamber 5 is 3mm, the length is 6mm and the depth is 1mm.

In this embodiment, a fan-shaped baffle 6 is provided in the contracting-expanding mixing chamber 5. The maximum width of the fan-shaped baffle 6 is 1.2mm, the length is 2.2mm, and the depth is 1mm. The side surface of the fan-shaped baffle 6 consists of two planes and an arc surface. Unlike the shape presented in fig. 6 and 7, in embodiment 9, the apex of the angle between the two planes in the side of the sector-shaped baffle 6 faces the inlet of the contraction-expansion mixing chamber 5, and the arc surface in the side of the sector-shaped baffle 6 faces the outlet of the contraction-expansion mixing chamber 5, i.e., the head of the sector-shaped baffle 6 is sharp, and the tail is arc-shaped. The fan-shaped baffle 6 is generally narrower near the inlet of the convergent-divergent mixing chamber 5 and wider near the outlet of the convergent-divergent mixing chamber 5.

In this embodiment, the vortex mixing flow channel 9 has a width of 1mm, a length of 10mm and a depth of 1mm. The vortex mixing channel 9 is arcuate. The angle between the inlet and outlet of the vortex mixing channel 9 is 180 °.

Claims

1. The micro-mixing channel is characterized by comprising at least two feeding inlets, at least two inlet channels, an inlet communication channel, at least two shrinkage-expansion mixing chambers, an outlet communication channel and a discharge outlet, wherein the inlet channels are in one-to-one correspondence with the feeding inlets, each feeding inlet is connected with each inlet channel respectively, each inlet channel is connected with the inlet communication channel, a fan-shaped baffle is arranged in each shrinkage-expansion mixing chamber, each shrinkage-expansion mixing chamber is sequentially connected, the inlet communication channel is connected with the first shrinkage-expansion mixing chamber, the last shrinkage-expansion mixing chamber is connected with the outlet communication channel, and the outlet communication channel is connected with the discharge outlet.

2. The micro-mixing channel with scallops according to claim 1 wherein said micro-mixing channel has one or more of the following features:

the width of the feed inlet is 0.1-2mm, and the depth is 0.1-2mm;

the width of the inlet channel is 0.1-2mm, the depth is 0.1-2mm, and the length is 3-10mm;

the width of the inlet communication channel is 0.1-2mm, the depth is 0.1-2mm, and the length is 2-15mm;

The maximum width of the contraction-expansion mixing chamber is 1.5-6mm, the depth is 0.1-2mm, and the length is 4-10mm;

the maximum width of the fan-shaped baffle is 0.1-2.5mm, the depth is 0.1-2mm, and the length is 2-5mm;

the width of the outlet communication channel is 0.1-2mm, the depth is 0.1-2mm, and the length is 3-15mm;

the width of the discharge hole is 0.1-2mm, and the depth is 0.1-2mm;

the number of the inlet channels is 2; preferably, the angle between the two inlet channels is 45 ° -120 °;

adjacent two contracting-expanding mixing chambers are directly connected;

the number of the constriction-expansion mixing chambers is 5 to 25, for example 10 to 20.

3. The micromixing channel having scallops of claim 1 wherein the converging-diverging mixing chamber has two arcuate side walls, an inlet and an outlet, the width of the intermediate portion of the converging-diverging mixing chamber being greater than the width of the inlet and outlet ends;

preferably, the side surface of the fan-shaped baffle plate is composed of two planes and an arc surface, wherein in the side surface of the fan-shaped baffle plate, the vertex of an included angle of the two planes faces the inlet of the contraction-expansion mixing chamber, and the arc surface faces the outlet of the contraction-expansion mixing chamber, or the arc surface faces the inlet of the contraction-expansion mixing chamber, and the vertex of an included angle of the two planes faces the outlet of the contraction-expansion mixing chamber.

4. The microreactor is characterized by comprising at least two feed inlets, at least two inlet channels, an inlet connecting channel, at least two shrinkage-expansion mixing chamber assemblies, at least one vortex mixing channel, an outlet communication channel and a discharge outlet, wherein the inlet channels are in one-to-one correspondence with the feed inlets, each feed inlet is connected with each inlet channel respectively, each inlet channel is connected with the inlet communication channel, each shrinkage-expansion mixing chamber assembly comprises at least two shrinkage-expansion mixing chambers which are sequentially connected, each shrinkage-expansion mixing chamber assembly is connected through the vortex mixing channel, each shrinkage-expansion mixing chamber is internally provided with one fan-shaped baffle, the inlet communication channel is connected with the first shrinkage-expansion mixing chamber, the last shrinkage-expansion mixing chamber is connected with the outlet communication channel, and the outlet communication channel is connected with the discharge outlet.

5. The microreactor with a scallop baffle according to claim 4 wherein the microreactor has one or more of the following features:

the width of the feed inlet is 0.1-2mm, and the depth is 0.1-2mm;

the width of the vortex mixing flow passage is 0.1-2mm, the depth is 0.1-2mm, and the length is 8-20mm;

the width of the discharge hole is 0.1-2mm, and the depth is 0.1-2mm;

in each contraction-expansion mixing chamber combination, two adjacent contraction-expansion mixing chambers are directly connected;

in each combination of the contraction-expansion mixing chambers, the number of the contraction-expansion mixing chambers is 5-25, such as 10-20;

the number of the shrinkage-expansion mixing chamber assemblies is 5-10.

6. The microreactor with scallop baffles according to claim 4 wherein the converging-diverging mixing chamber has two arcuate sidewalls, an inlet and an outlet, the converging-diverging mixing chamber having a central portion with a width greater than the widths of the inlet and outlet ends;

7. The microreactor with scallops according to claim 4 wherein each of the converging-diverging mixing chamber assemblies is arranged in a parallel and circuitous configuration with the leading and trailing portions of the latter converging-diverging mixing chamber assembly aligned with the trailing and leading portions of the former converging-diverging mixing chamber assembly, respectively, and the vortex mixing flow path is circular arc shaped.

8. A micro-mixing channel with scallops according to any one of claims 1-3 or a micro-reactor with scallops according to any one of claims 4-7, wherein the micro-mixing channel or the micro-reactor is manufactured using etching, MEMS manufacturing process, 3D printing, machining or ultra-fast laser machining process.

9. A micromixing channel with scallops according to any one of claims 1-3 or a microreactor with scallops according to any one of claims 4-7, wherein the micromixing channel or the microreactor has a unitary structure;

Preferably, the material of the micro-mixing channel or the micro-reactor is selected from one or more of borosilicate glass, quartz glass, acrylonitrile-butadiene-styrene copolymer, polyamide, polybutylene terephthalate, polyethylether and polymethyl methacrylate.

10. A micromixing channel with scallops according to any one of claims 1-3 or a microreactor with scallops according to any one of claims 4-7, wherein the micromixing channel or the microreactor has a split-type structure;

preferably, the micro-mixing channel or the micro-reactor comprises an upper cover plate and a lower base plate, wherein the upper cover plate is connected with the lower base plate to form various flow channels and chambers;