CN217614655U

CN217614655U - Micro-mixing device

Info

Publication number: CN217614655U
Application number: CN202123448518.6U
Authority: CN
Inventors: 王春; 李嫣然; 张海彬; 陈鸿文; 王志磊; 卜春波; 李正强
Original assignee: Shenzhen E Zheng Tech Co ltd
Current assignee: Shenzhen E Zheng Tech Co ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-10-21
Anticipated expiration: 2031-12-31

Abstract

The utility model discloses a micro-mixing device, which comprises a plurality of micro-mixers arranged in series, wherein each micro-mixer comprises a shell and a mixing structure, a reaction space is formed inside the shell, and the shell is also provided with a reaction inlet and a reaction outlet which are respectively communicated with the reaction space; the mixing structure comprises a plurality of mixing units which are sequentially communicated, and a plurality of mixing flow channels which are distributed in a star-shooting manner are formed in the mixing units. The utility model discloses technical scheme aims at promoting the mixed effect of micro-mixing device, enlarges micro-mixing device's range of application, reduces the cost of scientific research.

Description

Micro-mixing device

Technical Field

The utility model relates to a little chemical industry technical field, in particular to little mixing arrangement.

Background

The micro mixer is used for realizing the full mixing of different reactants under the condition of a micro channel, and is an important component in the micro chemical technology.

Most of the existing micromixers have a channel size of below 100um or above 2000um, and among them, the micromixer having a channel size of below 100um is only suitable for kinetic verification or condition screening of chemical synthesis reaction; the micro mixer with the channel size of more than 2000um is only suitable for industrial production with large flux, and various models are available on the market for the industrial micro mixer. For example, in patent CN201711253614.0, a double-T plane curved micro mixer is introduced, in which the channel size of the mixing structure is 100um, and the mixer is applied to a microfluidic chip and mainly applied to the field of analytical chemistry. As a micromixer disclosed in patent CN202021806816.0, the channel size is 200um, and in practical application, when the flow rate of fluid is increased to 10mL/min, the pressure drop of the mixture is already as high as 10-15bar, and if the flow rate is further increased, the pressure drop of the mixture will be exponentially increased. However, most scientific researches or some drug production processes need to realize pilot-scale process researches, and the existing micro-mixers can not be matched with the mesoscopic sizes suitable for scientific research purposes, so that the experiments of researchers are limited. For example, when a pilot scale process is performed by using a micro mixer with a channel size of about 200um, the reaction pressure drop is large, the requirements on materials are severe, and the pilot scale process development and production are difficult to realize. If other suitable equipment is provided to meet the reaction requirements, the development cost is increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a little mixing arrangement, when aiming at the mixed effect that keeps the blender of microscale, reduce the pressure drop of blender, be convenient for improve the flux of little blender, enlarge little mixing arrangement's application range to reduce the research and development cost.

In order to achieve the above object, the utility model provides a micro-mixing device, including the micro-mixer of a plurality of series connection settings, micro-mixer includes:

the device comprises a shell, a reaction space is formed in the shell, and the shell is also provided with a reaction inlet and a reaction outlet which are respectively communicated with the reaction space;

the mixing structure comprises a plurality of mixing units which are communicated in sequence, and a plurality of mixing flow channels distributed in a star-shooting mode are formed in the mixing units.

In an embodiment of the present invention, the mixing unit includes a runner plate and a cover plate, the runner plate and the cover plate cooperate to form the mixing runner.

In an embodiment of the present invention, the flow channel plate and the cover plate are alternately disposed.

The utility model discloses an in one embodiment, runner plate surface be formed with many guiding gutters, many the one end of guiding gutter collect in runner plate's geometric center, the other end is all followed runner plate edge extends the setting, many the guiding gutter is followed runner plate's circumference is the star and penetrates and arrange.

In an embodiment of the present invention, a plurality of flow field plates are provided with a central hole, a central axis of the central hole coincides with a central line of the flow field plate, and the diversion trench is connected to the central hole;

the center line of the diversion trench is perpendicular to the edge line of the central hole; or

The central line of the diversion trench is vertically tangent to the edge line of the central hole.

In an embodiment of the present invention, the cover plate has a through hole, and a central axis of the through hole coincides with a central line of the flow channel plate; or,

the cover plate is provided with a plurality of through holes, and one through hole corresponds to one end of each flow guide groove far away from the geometric center of the flow passage plate.

In an embodiment of the present invention, in two adjacent cover plates, one of the through holes is one, and the other of the through holes is plural.

In an embodiment of the present invention, the size range of the mixing channel is 300um to 1000um.

The utility model also provides a manufacturing approach of little mixing arrangement, including following step:

forming a star-shot type distributed mixed flow channel in the mixing unit by using laser etching;

connecting a plurality of mixing units into a mixing structure by vacuum diffusion welding in sequence;

connecting the mixing structure and the shell into a single micromixer;

a plurality of micromixers are connected in series to form a micromixer apparatus.

In an embodiment of the present invention, in the step of connecting the plurality of mixing units to form the mixing structure in sequence by vacuum diffusion welding, the vacuum diffusion welding step includes:

and sequentially placing the plurality of mixing units in diffusion welding equipment, maintaining the pressure and the heat for 30-90 minutes in an environment with the vacuum degree of 3-10Pa, the temperature of 800-1000 ℃ and the welding pressure of 8-15MPa, stopping heating, regulating the welding pressure to 1-3MPa, filling argon into the diffusion welding equipment, and regulating the temperature in the diffusion welding equipment to 150 ℃ for 15-30 minutes.

The utility model discloses micro-mixing device includes that a plurality of micro-mixers establish ties and form among the technical scheme to, all be equipped with a plurality of mixing unit that communicate in proper order in each reactor, mixing unit is equipped with and is the mixed runner that the formula of penetrating distributes of star. When the reactants flow into the mixing unit, the mixing flow channels are distributed in a star-shooting manner, so that the reactants can be guided to diffuse or converge along the flow channels distributed in the star-shooting manner, and the mixing effect of the reactants is improved. Scientific research personnel can connect a plurality of reactors in series as required when needing to carry out scientific research for the dwell time of reactant in the blender can be prolonged according to the reaction demand, in order to satisfy the demand to reaction time, reaction output among the scientific research. Because the micro-mixing device in the scheme has wide adaptability, other applicable equipment is not required to be additionally equipped to meet the reaction requirement, and the scientific research cost is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an embodiment of a micro-mixing device according to the present invention;

FIG. 2 is a schematic diagram of the micro-mixer of FIG. 1;

fig. 3 is an exploded view of the micro mixer shown in fig. 2;

FIG. 4 is a schematic structural diagram of a flow field plate according to an embodiment;

FIG. 5 is a schematic structural view of a flow field plate according to another embodiment;

FIG. 6 is a schematic structural view of a flow field plate according to yet another embodiment;

FIG. 7 is a schematic structural diagram of a cover plate according to an embodiment;

FIG. 8 is a schematic structural diagram of a cover plate according to another embodiment;

fig. 9 is a flow chart of an embodiment of a micro-mixing device.

The reference numbers illustrate:

the objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, back \8230;) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the attached drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B," including either the A or B arrangement, or both A and B satisfied arrangement. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a little mixing arrangement 100.

Referring to fig. 1 to 3, a micro-mixing device 100 according to an embodiment of the present invention includes a plurality of micro-mixers 01 connected in series, where the micro-mixers 01 include:

the reaction device comprises a shell 10, wherein a reaction space is formed inside the shell 10, and the shell 10 is also provided with a reaction inlet 11 and a reaction outlet 13 which are respectively communicated with the reaction space;

mixing structure 30, mixing structure 30 includes a plurality of mixing unit that communicate in proper order, be formed with a plurality of mixing flow channels that are the star and penetrate formula and distribute in the mixing unit.

The utility model discloses micro-mixing device 100 includes that a plurality of micromixers 01 establish ties and form among the technical scheme to, all be equipped with a plurality of mixing unit that communicate in proper order in each reactor, mixing unit is equipped with and is the mixed runner that the star penetrated the formula and distributes. When the reactants flow into the mixing unit, the mixing flow channels are distributed in a star-shooting manner, so that the reactants can be guided to diffuse or converge along the flow channels distributed in the star-shooting manner, and the mixing effect of the reactants is improved. When scientific research is carried out by scientific researchers, the reactors can be connected in series according to requirements, so that the residence time of reactants in the mixer can be prolonged according to reaction requirements, and the requirements on reaction time and reaction yield in the scientific research can be met. Because the micro-mixing device 100 in the scheme has wide adaptability, other applicable equipment is not required to be additionally arranged to meet the reaction requirement, and the scientific research cost is reduced.

In the embodiment of the utility model provides an in, the size scope of mixing the runner is 300um to 1000um. The size of the mixing flow channel is set in the range, compared with a micro mixer 01 with the channel size below 100um and only suitable for kinetic verification, the flow rate is large, and under the same reaction condition, more yield can be obtained, so that the demand on the amount of reaction products in scientific research can be met.

In the micro mixing device 100, each micro mixer 01 is a stage, the number of reaction stages in the micro mixing device 100 may be 3, four, five, six, seven, etc., the number of reaction stages may be determined according to the required reaction time, and after the number of reaction stages is determined, the corresponding number of micro mixers 01 may be connected in series in sequence. It is understood that the serial connection between the plurality of micromixers 01 may be implemented by connection pipes. For example, the reaction inlet 11 of the first-stage microreactor is connected to a feed conduit, the reaction outlet 13 is connected to the reaction inlet 11 of the next-stage microreactor, and the reaction outlet 13 of the end-end microreactor is connected to a discharge conduit. The micro mixing device 100 formed by connecting a plurality of micro mixers 01 in series can be increased or reduced according to actual requirements, and has high flexibility and wide application range.

It will be understood that the number of reaction inlets 11 may be one or more, so as to facilitate the addition of reaction material to the reaction space in the middle of the reaction.

Referring to fig. 2 and 3, in an embodiment of the present invention, the mixing unit includes a flow passage plate 31 and a cover plate 33, and the flow passage plate 31 and the cover plate 33 cooperate to form the mixing flow passage.

The utility model discloses in the technical scheme of an embodiment, mixing unit quantity can be 3, 4, 5, 6, 7, 8 or be 9 etc. and mixing unit's quantity can rationally increase or reduce according to the mixed demand. The number of mixing units determines the mixing quality of each micromixer. In a preferred embodiment, the number of mixing units is greater than 5. After the reactants enter the reaction space through the reaction inlet 11, the reactants sequentially enter the star-shooting type mixing flow channel in the mixing unit, and are sequentially gathered and dispersed or are sequentially dispersed and gathered for multiple times, so that the reactants are fully mixed and then flow out to the next stage of reaction through the reaction outlet 13. It will be appreciated that the flow field plates 31 and the cover plates 33 in the mixing structure 30 alternate. The number of the flow channel plates 31 and the cover plates 33 may be equal or unequal, and any two adjacent plates may form one mixing unit as long as the flow channel plates 31 and the cover plates 33 are alternately arranged. The number of mixing units is one or two less than the total number of the flow passage plate 31 and the cover plate 33.

Further, referring to fig. 4 to 6, in an embodiment of the present invention, the surface of the flow channel plate 31 is formed with a plurality of guiding grooves 311, a plurality of the guiding grooves 311 are gathered at one end of the flow channel plate 31, the other end is all along the edge of the flow channel plate 31 is extended and disposed, and a plurality of the guiding grooves 311 are disposed along the circumference of the flow channel plate 31 in a star-shooting manner.

In the technical solution of an embodiment of the present invention, the diversion trench 311 is formed on the opposite surface of the flow passage plate 31, and when the flow passage plate 31 is attached to the cover plate 33, the diversion trench 311 can form a mixed flow passage. The shapes of the flow passage plate 31 and the cover plate 33 may be circular or square, as long as the flow passage plate 31 and the cover plate 33 are fitted to the housing 10, and the shapes of the flow passage plate 31 and the cover plate 33 are not limited herein.

The number of the guiding grooves 311 may be any number, such as 3, 4, 5, 6, 8, 10, 12, etc., and the number of the guiding grooves 311 may be n +1, where n is a positive integer. The plurality of flow guide grooves 311 are distributed in a star-like manner, and the plurality of flow guide grooves 311 are also uniformly distributed along the circumferential direction of the flow guide plate, so that the reactant can be dispersed from the middle to the edge of the flow guide plate 31, or the reactant is gathered from the edge to the middle of the flow guide plate 31, so as to achieve sufficient mixing of the reactant. After the backflow grooves are converged, a central hole 313 is formed in the center of the combination of the runner plates 31, the central axis of the central hole 313 is overlapped with the central line of the set of the runner plates 31, and the guide grooves 311 are connected with the central hole 313.

The flow guide slots 311 converge with the central hole 313 in various forms, for example, the center line of the flow guide slots 311 is perpendicular to the edge line of the central hole 313, so that the mixture can be mixed in the radial direction of the diffusion plate. Alternatively, the center line of the channels 311 is perpendicular to the edge line of the central hole 313, so that the mixture can be mixed in the tangential direction of the diffuser plate. Like this, can make the mode of mixing diversified, promote mixed effect.

Referring to fig. 7 and 8, in an embodiment of the present invention, the cover plate 33 is provided with a through hole 331, and a central axis of the through hole 331 coincides with a central line of the runner plate 31; or,

the cover plate 33 is provided with a plurality of through holes 331, and one through hole 331 corresponds to one end of each flow guide slot 311 away from the geometric center of the flow passage plate 31.

The utility model discloses an among the technical scheme of an embodiment, apron 33 and the laminating setting of runner plate 31 establish on the apron 33 and supply the reactant to flow through-hole 331, through-hole 331 position and quantity need with the guiding gutter 311 looks adaptation on the runner plate 31. When the through hole 331 corresponds to the geometric center of the flow channel plate 31, the flow direction of the reactant is diffused from the middle to the edge; when the number of the through holes 331 is plural, and one through hole 331 corresponds to one flow guide groove 311 away from the collection center of the flow channel plate 31, the cover plate 33 and the flow channel plate 31 form a mixed flow channel in which the flow direction of the reactant is arranged to flow from the edge to the center. And, of the cover plates 33 of the adjacent two mixing units, the cover plate 33 of one mixing unit is provided with one through hole 331, and the cover plate 33 of the other mixing unit is a plurality of through holes 331. Therefore, the reactants can be sequentially and continuously dispersed and gathered in the reaction space, and the mixing effect of the reactants is improved.

The materials of the housing 10, the cover plate 33 and the runner plate 31 are preferably 316L stainless steel, stainless steel mixer, with good heat resistance and wide working temperature range, good corrosion resistance, no rustiness, and fast heating and cooling speed, and can be suitable for research and development personnel to search in reaction experiment. Of course, the materials of the casing 10, the cover plate 33 and the runner plate 31 may also be selected from special alloys, such as hastelloy, titanium alloy, tantalum, etc., which are not limited herein.

Moreover, in the embodiment of the present invention, in order to increase the heat conductivity of the micro mixer 01, a heat exchanging device may be further disposed on the surface of the casing 10, and the thickness of the casing 10 is approximately 0.5 to 2mm; the thickness of the runner plate 31 is 0.05-1mm; the thickness of the cover plate 33 is 0.5-1mm to realize rapid heat exchange to the reaction space and meet the temperature requirement of reactant reaction.

Specifically, the housing 10 includes two opposite half shells. The housing 10 and the mixing structure 30 are screwed. In each mixing unit, the flow passage plate 31 and the cover plate 33 are connected by welding. In particular, the connection is realized by a vacuum diffusion welding process. Before the flow channel plate 31 and the cover plate 33 are welded, the flow guide grooves 311 may be formed in the flow channel plate 31 by a laser etching process, and then the cover plate 33 is attached to the flow channel plate 31 and welded to form a single mixing unit, and then a plurality of mixing units are connected by welding.

Referring to fig. 9, the present invention further provides a method for manufacturing the micro-mixing device 100, comprising the steps of:

s1, forming a star-shot type distributed mixed flow channel in a mixing unit by using laser etching;

s2, connecting the plurality of mixing units into a mixing structure 30 by vacuum diffusion welding in sequence;

s3, connecting the mixing structure 30 and the shell 10 into a single micro mixer 01;

s4, a plurality of micro mixers 01 are connected in series to form a micro mixing device.

In the embodiment of the present application, the flow path plate 31 and the cover plate 33 are both cut in advance to a predetermined shape, and if necessary, the surfaces thereof may be polished by aligning the surfaces with a polishing tool or the like to have a flat and bright surface with a roughness of 0.005 to 0.01mm. Then, the flow guide grooves 311 distributed in a star-like manner are processed on the surface of the flow channel plate 31 by using a laser etching process, the flow channel plate 31 and the cover plate 33 are welded and connected by using a vacuum diffusion welding process to form a single mixing unit, and a plurality of mixing units are connected by using the vacuum diffusion welding process to form the complete mixing structure 30. The diffusion welding equipment is a vacuum diffusion welding furnace, can keep the original high-precision size without influencing the whole size of the runner, and can ensure that the runner plate 31 and the cover plate 33 keep the physical, chemical and mechanical properties of the original metal. The hybrid structure 30 may be attached to the housing 10 by a vacuum diffusion welding process, assisted by screws. Among the plurality of micro mixers 01, adjacent micro mixers 01 may be connected in series by directly using a connection pipe.

In step S2, the step of connecting the plurality of hybrid units to the hybrid structure 30 by vacuum diffusion welding in sequence includes:

Similarly, the welded connection of the flow path plate 31 and the cover plate 33 in step S1 is the same as described above. Through diffusion welding technique with a plurality of runner plates 31, apron 33 welding forms an organic whole, this mode, the runner that makes the preliminary working accomplish can not receive the influence, and then the runner volume that forms can not receive too big influence, can keep the size of runner even, and, can keep the former material characteristic of micromixer 01, make the micromixer 01 of making be applicable to in the experiment that high low temperature constantly switched, the research and development personnel of being convenient for are explored in the reaction experiment, and need not to be equipped with other blenders, and the research and development cost is reduced. The above only be the preferred embodiment of the utility model discloses a not consequently restriction the utility model discloses a patent range, all are in the utility model discloses a conceive, utilize the equivalent structure transform of what the content was done in the description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a patent protection within range.

Claims

1. A micro-mixing device comprising a plurality of micro-mixers arranged in series, the micro-mixers comprising:

2. The micro-mixing device of claim 1, wherein the mixing unit comprises a flow field plate and a cover plate, the flow field plate and the cover plate cooperating to form the mixing channel.

3. The micro-mixing device of claim 2, wherein the flow field plates and the cover plates are arranged alternately.

4. The micro-mixing device of claim 2, wherein the surface of the flow field plate is formed with a plurality of flow guide grooves, one end of each flow guide groove is collected at the geometric center of the flow field plate, the other end of each flow guide groove extends along the edge of the flow field plate, and the flow guide grooves are arranged in a star-like manner along the circumferential direction of the flow field plate.

5. The micro-mixing device of claim 4, wherein a plurality of the flow field plates have a central aperture, a central axis of the central aperture coinciding with a collective centerline of the flow field plates, and the flow guide channel is connected to the central aperture;

the central line of the diversion trench is vertical to the edge line of the central hole; or

The center line of the diversion trench is vertically tangent to the edge line of the central hole.

6. The micro-mixing device of claim 4, wherein the cover plate has a through hole with a central axis coincident with a center line of the flow field plate; or,

7. The micro-mixing device of claim 6, wherein one of the through holes of one of the two adjacent cover plates is a plurality of through holes.

8. The micro-mixing device of any of claims 1 to 6, wherein the mixing channel has a size in the range of 300um to 1000um.