A micro mixer

Abstract

The present invention discloses a micro mixer, including a mixer body, a first feed channel, a second feed channel, and a discharge channel are arranged on the mixer body, a first distribution chamber connected to the first feed channel, a second distribution chamber connected to the second feed channel, and a mixing chamber connected to the discharge channel are arranged in the mixer body, a plurality of first shunt channels are connected to the first distribution chamber, a plurality of second shunt channels are connected to the second distribution chamber, a plurality of mixing channels are connected to the mixing chamber, and one end of the first shunt channel is merged with one end of the second shunt channel and connected to the mixing channel. The present invention adopts the idea of ​​shunting first and then mixing. Under the action of the distribution chamber and the shunt channel, two different materials are first evenly divided into multiple thin streams, and then the multiple thin streams are merged to form a preliminary mixture, and finally enter the mixing chamber along the mixing channel, and the materials collide and mix in the mixing chamber to form a good mixing effect.

Description

Technical Field

[0001] The invention relates to a mixer, in particular to a micro mixer used for reaction and mixing in the chemical and pharmaceutical fields. Background Art

[0002] In the field of micro-reaction systems, after the materials transported by the volumetric conveying equipment enter the reactor, the initial mixing of the materials fails to reach the required degree, which will inevitably increase the residence time of the materials in the reactor and affect the reaction efficiency. Experiments show that in the micro-reaction system, the addition of a front-end mixer can significantly promote the reaction efficiency, product conversion rate and yield. Therefore, the application of micro-mixers in the field of micro-chemicals is very necessary.

[0003] Invention patent application CN 107626250 A discloses a micro mixer, which is a stacked micro mixer consisting of many mixing plates. Through two inlet fluids, fluids are converged in the center in a turbine manner for mixing, and then enter the next layer and are reversely divided into two paths, repeating the steps of the previous stage. Multiple mixing zones are connected in series, and products flow through in sequence, undergo mixing reactions in the mixing zones, and finally flow out from the main channel of the mixing zone to complete the micro mixing reaction.

[0004] However, the above scheme has the following disadvantages: 1. Multiple mixing zones are connected in series, and the flux is obviously limited. Increasing the flux has a greater impact on the pressure drop. When it is necessary to achieve a certain flux and control a specific pressure drop, the channel size will inevitably increase, sacrificing the mixing effect; 2. The mixer of this scheme has a long mixing path and cannot achieve the mixing effect in a shorter time, which is not conducive to some reaction conditions that require the mixing time to be less than the reaction time.

[0005] Therefore, the purpose of the present invention is to overcome the defects of the micromixer in the prior art, such as low flux flexibility, high pressure drop, long mixing path and low efficiency, and to provide a micromixer with high flux flexibility, low pressure drop, short mixing time and high efficiency, which is particularly suitable for the situation of high linear speed. Summary of the invention

[0006] The purpose of the present invention is to overcome the defects of the prior art micromixers such as low flux flexibility, high pressure drop, long mixing path and low efficiency, and to provide a micromixer with high flux flexibility, low pressure drop, short mixing time and high efficiency.

[0007] The objective of the present invention is achieved through the following technical scheme: a micro mixer, comprising a mixer body, on which a first feed channel, a second feed channel and a discharge channel are arranged, a first distribution chamber connected to the first feed channel, a second distribution chamber connected to the second feed channel, and a mixing chamber connected to the discharge channel are arranged in the mixer body, the first distribution chamber is connected to a plurality of first diversion channels, the second distribution chamber is connected to a plurality of second diversion channels, the mixing chamber is connected to a plurality of mixing channels, and one end of the first diversion channel merges with one end of the second diversion channel and is connected to the mixing channel.

[0008] In the present invention, two different materials enter the micro-mixer from the first feed channel and the second feed channel respectively. When the two materials reach the first distribution chamber and the second distribution chamber respectively, the materials are divided here and evenly distributed to each first diversion channel and the second diversion channel. Then the materials continue to flow along the first diversion channel and the second diversion channel. The materials in the first diversion channel and the second diversion channel merge and enter the mixing channel. At the junction, the two materials are preliminarily mixed; then the preliminarily mixed materials in each mixing channel continue to flow along the mixing channel and collide and mix in the mixing chamber, and the mixed materials in the mixing chamber finally flow out from the discharge channel. The present invention adopts the idea of ​​first diversion and then mixing. Under the action of the distribution chamber and the diversion channel, the two different materials are first divided into multiple thin streams, and then the multiple thin streams are merged to form a preliminary mixture. Finally, they enter the mixing chamber along the mixing channel, and the materials collide and mix in the mixing chamber to form a good mixing effect. Compared with the traditional microreactor, the material mixing path in the present invention is shorter, the mixing time is short, the instantaneous mixing effect can be achieved, and the pressure drop is small, the efficiency is high, and the mixing effect is good, which is particularly suitable for the case of high linear speed.

[0009] Preferably, the mixer body is made by metal 3D printing technology. In the present invention, since the internal flow channel and the flow chamber are arranged, the internal structure is relatively complex. If the traditional mold manufacturing method is adopted, the manufacturing difficulty is high and the mold opening cost is high; however, the metal 3D printing technology greatly reduces the manufacturing difficulty and saves the mold opening cost.

[0010] Preferably, the mixer body is made of 316L steel.

[0011] Preferably, the mixing chamber, the first distribution chamber and the second distribution chamber are all spherical. The mixing chamber, the first distribution chamber and the second distribution chamber are designed to be spherical, so as to have good self-supporting performance and effectively reduce the possibility of cavity collapse.

[0012] Preferably, the first diversion channel and the second diversion channel both include horizontal sections and vertical sections, the horizontal section on the first diversion channel radiates outward radially along the first distribution chamber, and the horizontal section on the second diversion channel radiates outward radially along the second distribution chamber; the vertical section on the first diversion channel and the vertical section on the second diversion channel extend toward the direction of the mixing channel, and the two are connected to the mixing channel after merging.

[0013] Preferably, eight first shunt channels, eight second shunt channels and eight mixing channels are provided, and the angle between two adjacent first shunt channels is 45 degrees, and the angle between two adjacent second shunt channels is 45 degrees. The more the number of first shunt channels and second shunt channels, the greater the total flux; the smaller the diameter of the first shunt channel and the second shunt channel, the better the mixing, and the better the advantages of the microchannel can be brought into play; in the present invention, the number of the first shunt channel and the second shunt channel is eight, and the first shunt channel and the second shunt channel are evenly arranged on the radial outside of the first distribution chamber and the second distribution chamber, respectively. The number of channels is large, and a large total flux and a better mixing effect can be achieved.

[0014] Preferably, the included angle between the first diversion channel and the second diversion channel adjacent thereto on the horizontal projection plane is 22.5 degrees.

[0015] Preferably, the vertical section on the first shunt channel and the vertical section on the second shunt channel merge in a "Y" shape and are connected to the mixing channel. The vertical section on the first shunt channel merges in a "Y" shape, and before the materials in the first shunt channel and the second shunt channel merge, there is a certain angle between the flow directions of the two materials, and the two materials will collide with each other at a certain angle at the confluence, promoting mixing between the materials.

[0016] Preferably, when the vertical section on the first diversion channel and the vertical section on the second diversion channel merge, the angle between the two is 60 degrees.

[0017] The beneficial effects of the present invention are as follows: the present invention adopts the idea of ​​first diverting and then mixing. Under the action of the distribution chamber and the diverting channel, two different materials are first evenly divided into multiple thin streams, and then the multiple thin streams are merged to form a preliminary mixture, and finally enter the mixing chamber along the mixing channel. The materials collide and mix in the mixing chamber to form a good mixing effect. Compared with traditional microreactors, the mixing path of the materials in the present invention is shorter, the mixing time is short, the pressure drop is small, the efficiency is high, and the mixing effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the appearance structure of the present invention.

[0019] Figure 2 It is a front view from one angle of the present invention.

[0020] Figure 3 for Figure 2 Cross-sectional view along the AA direction.

[0021] Figure 4 It is a front view from another angle of the present invention.

[0022] Figure 5 for Figure 4 Cross-sectional view in the PP direction.

[0023] Figure 6 for Figure 4 Sectional view along the QQ direction.

[0024] Figure 7 for Figure 4 Cross-sectional view in the SS direction.

[0025] In the figure: 1. mixer body, 2. discharge channel, 3. first feed channel, 4. second feed channel, 5. mixing chamber, 6. first distribution chamber, 7. second distribution chamber, 8. mixing channel, 9. first diversion channel, 10. second diversion channel. DETAILED DESCRIPTION

[0026] The present invention will be further described below through specific implementation modes in conjunction with the accompanying drawings.

[0027] Embodiment 1:

[0028] like Figures 1 to 7As shown, a micro mixer comprises a mixer body 1. The mixer body 1 is provided with a first feed channel 3, a second feed channel 4, and a discharge channel 2. The mixer body 1 is provided with a first distribution chamber 6 connected to the first feed channel 3, a second distribution chamber 7 connected to the second feed channel 4, and a mixing chamber 5 connected to the discharge channel 2. One end of the first feed channel 3 passes through the side of the mixer body 1, and the other end is connected to the first distribution chamber 6. One end of the second feed channel 4 passes through the side of the mixer body 1, and the other end is connected to the second distribution chamber 7. The first distribution chamber 6, the second distribution chamber 7 and the mixer 5 are all spherical. The first distribution chamber 6 is connected with a plurality of first shunt channels 9, the second distribution chamber is connected with a plurality of second shunt channels 10, and the mixing chamber 5 is connected with a plurality of mixing channels 8. The first shunt channels 9 are evenly arranged on the radial outer side of the first distribution chamber 6, the second shunt channels 10 are evenly arranged on the radial outer side of the second distribution chamber 7, and the mixing channel 8 is evenly arranged on the radial outer side of the mixing chamber 5. The first shunt channel 9, the second shunt channel 10 and the mixing channel 8 are each provided with eight. The first shunt channel 9 and the second shunt channel 10 both include a horizontal section and a vertical section. The horizontal section on the first shunt channel 9 radiates outward along the radial direction of the first distribution chamber 6, and the horizontal section on the second shunt channel 10 radiates outward along the radial direction of the second distribution chamber 7. The vertical section on the first shunt channel 9 and the vertical section on the second shunt channel 10 extend toward the direction of the mixing channel 8, and the two are connected to the mixing channel 8 after merging. The angle between the two adjacent first shunt channels 9 is 45 degrees, and the angle between the two adjacent second shunt channels 10 is 45 degrees. The angle between the first shunt channel 9 and the second shunt channel 10 adjacent thereto on the horizontal projection plane is 22.5 degrees. The vertical section on the first shunt channel 9 and the vertical section on the second shunt channel 10 merge in a "Y" shape and are connected to the mixing channel 8. When the vertical section on the first shunt channel and the vertical section on the second shunt channel merge, the angle between the two is 60 degrees. The mixer body 1 is made by metal 3D printing technology. The mixer body is made of 316L steel.

[0029] In the present invention, two different materials enter the micro-mixer from the first feed channel and the second feed channel respectively. When the two materials reach the first distribution chamber and the second distribution chamber respectively, the materials are diverted here and evenly distributed to each first diversion channel and the second diversion channel. Then the materials continue to flow along the first diversion channel and the second diversion channel. The materials in the first diversion channel and the second diversion channel merge and enter the mixing channel. At the confluence, the vertical section on the first diversion channel and the vertical section on the second diversion channel merge in a "Y" shape. Before the materials in the first diversion channel and the second diversion channel merge, there is a certain angle between the flow directions of the two materials. The two materials will collide with each other at a certain angle at the confluence to promote preliminary mixing between the materials; then the preliminary mixed materials in each mixing channel continue to flow along the mixing channel and collide and mix in the mixing chamber, and the mixed materials in the mixing chamber finally flow out from the discharge channel. The present invention adopts the idea of ​​first diverting and then mixing. Under the action of the distribution chamber and the diverting channel, two different materials are first evenly divided into multiple thin streams, and then the multiple thin streams are merged to form a preliminary mixture, and finally enter the mixing chamber along the mixing channel. The materials collide and mix in the mixing chamber to form a good mixing effect. Compared with the traditional microreactor, the mixing path of the materials in the present invention is shorter, the mixing time is short, the effect of instantaneous mixing can be achieved, and the pressure drop is small, the efficiency is high, and the mixing effect is good, which is especially suitable for the case of high linear speed. In the present invention, since the diverting channel and the diverting chamber are arranged inside, the internal structure is relatively complex. If the traditional mold manufacturing method is adopted, the manufacturing difficulty is high and the mold opening cost is high; however, the metal 3D printing technology greatly reduces the manufacturing difficulty and saves the mold opening cost.

[0030] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A micro mixer, comprising a mixer body, characterized in that: The mixer body is provided with a first feed channel, a second feed channel and a discharge channel. The mixer body is provided with a first distribution chamber connected to the first feed channel, a second distribution chamber connected to the second feed channel, and a mixing chamber connected to the discharge channel. The first distribution chamber is connected to a plurality of first diversion channels, the second distribution chamber is connected to a plurality of second diversion channels, and the mixing chamber is connected to a plurality of mixing channels. One end of the first diversion channel merges with one end of the second diversion channel and is connected to the mixing channel. The mixer body is made of 316L steel, and the mixing chamber, the first distribution chamber and the second distribution chamber are all spherical.

2. A micro mixer according to claim 1, characterized in that: The mixer body is made by metal 3D printing technology.

3. A micro mixer according to claim 1 or 2, characterized in that: The first diversion channel and the second diversion channel both include a horizontal section and a vertical section. The horizontal section on the first diversion channel radiates outward radially along the first distribution chamber, and the horizontal section on the second diversion channel radiates outward radially along the second distribution chamber; the vertical section on the first diversion channel and the vertical section on the second diversion channel extend toward the direction of the mixing channel, and the two are connected to the mixing channel after merging.

4. A micro mixer according to claim 3, characterized in that: There are eight first diversion channels, eight second diversion channels and eight mixing channels.

5. A micro mixer according to claim 4, characterized in that: The included angle between two adjacent first diversion channels is 45 degrees, and the included angle between two adjacent second diversion channels is 45 degrees.

6. A micro mixer according to claim 3, characterized in that: The included angle between the first branch channel and the second branch channel adjacent thereto on the horizontal projection plane is 22.5 degrees.

7. A micro mixer according to claim 3, characterized in that: The vertical section on the first branch channel and the vertical section on the second branch channel merge in a "Y" shape and are connected to the mixing channel.

8. A micro mixer according to claim 3, characterized in that: When the vertical section on the first branch channel and the vertical section on the second branch channel merge, the angle between the two is 60 degrees.

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