A microreaction channel, a reaction substrate, and a microchannel reactor

Abstract

The present invention provides a microreaction channel, a reaction substrate and a microchannel reactor, which comprise a first microchannel unit and a second microchannel unit. The first microchannel unit and the second microchannel unit are respectively arranged on both sides of the substrate. The end of the first microchannel unit is communicated with the head of the second microchannel unit, and the end of the second microchannel unit is communicated with the head of the next first microchannel unit. The head and tail of the first microchannel unit and the second microchannel unit of the microreaction channel provided by the present invention, which are respectively located on both sides of the substrate, are connected in sequence, so that the medium to be mixed rolls and flows on both sides of the substrate. In addition to the collision on a single plane, there is also an upward and downward rolling flow trend, strengthening the turbulence effect, avoiding the problem of complex processing caused by different widths of the entire reaction channel, enabling better reaction and flow effects for media with a certain concentration and media with solid particles of a certain diameter, with a simple structure and convenient production and processing.

Description

Technical Field

[0001] The present invention relates to the technical fields of chemical engineering and pharmaceuticals, and particularly relates to a microreaction channel, a reaction substrate, and a microchannel reactor. Background Art

[0002] At present, energy and fresh water resources are constantly depleting, but with the rapid development of industry, the demand for energy and fresh water resources is still increasing. Therefore, it is becoming increasingly important to improve the product synthesis efficiency and continuous productivity in fields such as chemical engineering and pharmaceuticals. The production scheme implemented by using a microchannel reactor can obtain a higher product yield and fewer by-products with a smaller amount of raw materials, and the production method is safer and more energy-saving, which can meet the production demand.

[0003] Generally, a microreactor refers to a reactor that at least partially adopts microreaction technology or ultra-precision machining technology in the manufacturing technology, and the characteristic size of its internal structure (such as the flow channel) is between sub-microns and sub-millimeters. Compared with conventional reaction equipment (such as reaction kettles and tubular reactors), the microreactor has a much smaller characteristic size, which enables it to have a large specific surface area, enhanced mass transfer and heat transfer processes, and can save the amount of reaction reagents to a certain extent, making the reaction process safer and more reliable. Through the digital amplification carried out by a large number of microreaction channels, industrial amplification can be simply and flexibly achieved, thus realizing continuous, efficient, and safe chemical production.

[0004] There are various forms of microchannels on the current market, such as existing narrow or heart-shaped channels, etc. However, the flow in the existing microchannels can only improve the mixing effect by accelerating the collision between materials and extending the flow channel. Although it can achieve a certain mixing effect, the mixing effect is still poor, and the flow channels in the entire microchannel are of different widths, which brings great difficulties to processing and manufacturing. Summary of the Invention

[0005] The purpose of the present invention is to provide a microreaction channel, a reaction substrate, and a microchannel reactor to solve the technical problems of poor mixing effect and large processing difficulty in the prior art.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is: providing a microreaction channel provided on a substrate, the microreaction channel includes a first microchannel unit and a second microchannel unit. At least two sequentially arranged first microchannel units are formed on one side surface of the substrate, and at least two sequentially arranged second microchannel units are formed on the other side surface of the substrate. The first microchannel unit and the second microchannel unit are arranged in an interleaved manner, and the end of the first microchannel unit is connected to the beginning of the second microchannel unit, and the end of the second microchannel unit is connected to the beginning of the next first microchannel unit.

[0007] Further, the first microchannel unit includes a first main channel and first branch channels located on both sides of the first main channel, and one end of each first branch channel is communicated with the head end of the first main channel;

[0008] The second microchannel unit includes a second main channel and second branch channels located on both sides of the second main channel, and one end of each second branch channel is communicated with the tail end of the second main channel;

[0009] The tail end of the first main channel is communicated with the head end of the second main channel through a first communication hole, and one end of the first branch channel far from the first main channel is communicated with one end of the second branch channel far from the second main channel through a second communication hole.

[0010] Further, a narrowing area is provided at the connection of the first main channel and the first branch channels; a narrowing area is also provided at the connection of the second main channel and the second branch channels.

[0011] Further, the diameter of the first communication hole is larger than the diameter of the second communication hole.

[0012] Further, the first microchannel unit includes a third main channel, third branch channels and fourth branch channels located on both sides of the third main channel, one end of each third branch channel is communicated with the head end of the third main channel, and one end of each fourth branch channel is communicated with the tail end of the third main channel;

[0013] The second microchannel unit includes a fourth main channel, fifth branch channels and sixth branch channels located on both sides of the fourth main channel, one end of each fifth branch channel is communicated with the head end of the fourth main channel, and one end of each sixth branch channel is communicated with the tail end of the fourth main channel;

[0014] One end of the fourth branch channel far from the third main channel is communicated with one end of the fifth branch channel far from the fourth main channel through a third communication hole, and one end of the sixth branch channel far from the fourth main channel is communicated with one end of the third branch channel of the next first microchannel unit far from the third main channel through a fourth communication hole.

[0015] Further, a communication area is provided on one side of the third main channel close to the third branch channels, and a narrowing area is provided on one side of the third main channel close to the fourth branch channels;

[0016] A communication area is provided on one side of the fourth main channel close to the fifth branch channels, and a narrowing area is provided on one side of the fourth main channel close to the sixth branch channels.

[0017] Further, the diameter of the third communication hole is equal to the diameter of the fourth communication hole.

[0018] Furthermore, the width of the narrowing area is smaller than the diameters of the third communication hole and the fourth communication hole.

[0019] The present invention also discloses a reaction substrate, which includes a substrate and a cover plate. At least two groups of the above-mentioned micro reaction channels are respectively arranged on both sides of the substrate, and a connection channel for connecting two adjacent micro reaction channels; the cover plates are located on opposite sides of the substrate, and the two cover plates respectively cover the first microchannel unit and the second microchannel unit.

[0020] Furthermore, the substrate is a thick plate body, the first microchannel unit and the second microchannel unit are respectively grooves formed on the substrate, and communication holes for respectively communicating the first microchannel unit and the second microchannel unit are formed on the substrate.

[0021] Furthermore, the substrate includes: a first plate body, a second plate body opposite to the first plate body, and an intermediate plate body located between the first plate body and the second plate body. The first microchannel unit is a through groove formed on the first plate body; the second microchannel unit is a through groove formed on the second plate body; a through hole for communicating the first microchannel unit and the second microchannel unit is formed on the intermediate plate body.

[0022] Furthermore, a first medium inlet hole, a second medium inlet hole, and a medium outlet hole are formed on both the substrate and the cover plate. The first medium inlet hole and the second medium inlet hole are respectively communicated with the head ends of the first microchannel unit or the second microchannel unit, and the medium outlet hole is communicated with the tail end of the first microchannel unit or the second microchannel unit.

[0023] Furthermore, heat exchange medium flow holes are also formed on both the substrate and the cover plate.

[0024] The present invention also discloses a microchannel reactor, which includes the reaction substrate described above.

[0025] Furthermore, heat exchange unit plates located on opposite sides of the reaction substrate and side plates located outside the heat exchange unit plates are also included.

[0026] Furthermore, heat exchange medium flow holes, a first medium inlet hole, a second medium inlet hole, and a medium outlet hole are formed on both the heat exchange unit plates and the side plates.

[0027] The beneficial effects of the microreaction channel, reaction substrate and microchannel reactor provided by the present invention are as follows: compared with the prior art, the microreaction channel of the present invention is composed of a plurality of first microchannel units and second microchannel units connected in sequence, and the first microchannel units and the second microchannel units located on both sides of the substrate are connected end to end in sequence, so that the medium to be mixed rolls and flows on both sides of the substrate. In addition to the collision on a single plane, it also has an up and down rolling flow trend, which strengthens the turbulent flow effect and makes the reaction medium mixed more uniformly. It avoids the problem of complex processing caused by the entire reaction channel being made of different widths, and also avoids affecting the reaction and flow effects of the medium with a certain concentration and diameter of solid particles. It also has good mixing effect, simple structure, and convenient production and processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 A schematic structural diagram of Example 1 of a micro-reaction channel provided in an embodiment of the present invention;

[0030] Figure 2 A schematic structural diagram of Example 2 of a micro-reaction channel provided in an embodiment of the present invention;

[0031] Figure 3 A schematic side cross-sectional structural diagram of a micro-reaction channel provided in an embodiment of the present invention;

[0032] Figure 4 This is a schematic structural diagram of a substrate used in Example 1 of the present invention, wherein the dotted line portion represents the back surface structure of the substrate;

[0033] Figure 5 This is a schematic diagram of the front structure of the substrate used in Example 3 of the present invention;

[0034] Figure 6 This is a schematic diagram of the back structure of the substrate used in Example 3 of the present invention;

[0035] Figure 7 This is a schematic structural diagram of the first plate body used in Example 4 of the present invention;

[0036] Figure 8 This is a schematic structural diagram of the intermediate plate used in Example 4 of the present invention;

[0037] Figure 9Schematic diagram of the second plate body adopted in Embodiment 4 of the present invention;

[0038] Figure 10 Schematic diagram of the substrate adopted in Embodiment 2 of the present invention, where the dotted part is the back structure of the substrate;

[0039] Figure 11 Front structure schematic diagram of the substrate adopted in Embodiment 3 of the present invention;

[0040] Figure 12 Back structure schematic diagram of the substrate adopted in Embodiment 3 of the present invention;

[0041] Figure 13 Schematic diagram of the first plate body adopted in Embodiment 4 of the present invention;

[0042] Figure 14 Schematic diagram of the second plate body adopted in Embodiment 4 of the present invention;

[0043] Figure 15 Schematic diagram of the intermediate plate body adopted in Embodiment 4 of the present invention;

[0044] Figure 16 Explosion decomposition structure diagram of the microchannel reactor provided by the embodiment of the present invention;

[0045] Figure 17 Schematic diagram of the heat exchange unit plate adopted in Embodiment 5 of the present invention;

[0046] Figure 18 Schematic diagram of the side plate adopted in Embodiment 5 of the present invention.

[0047] Explanation of reference numerals:

[0048] 1. Side plate; 2. Heat exchange unit plate; 3. Reaction substrate; 4. First medium inlet hole; 5. Second medium inlet hole; 6. Medium outlet hole; 7. Heat exchange medium flow hole; 31. Substrate; 32. Cover plate; 311. First microchannel unit; 312. Second microchannel unit; 313. Through hole; 314. Connection channel; 315. First plate body; 316. Second plate body; 317. Intermediate plate body; 3111. First main flow channel; 3112. First branch flow channel; 3113. Third main flow channel; 3114. Third branch flow channel; 3115. Fourth branch flow channel; 3121. Second main flow channel; 3122. Second branch flow channel; 3123. Fourth main flow channel; 3124. Fifth branch flow channel; 3125. Sixth branch flow channel; 3131. First communication hole; 3132. Second communication hole; 3133. Third communication hole; 3134. Fourth communication hole. Detailed implementation manners

[0049] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0050] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0051] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0052] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0053] Embodiment 1

[0054] Please refer to Figure 1 and Figure 3 , and now the micro reaction channel provided by the present invention will be described. The micro reaction channel is arranged on a substrate 31. At least two first microchannel units 311 arranged in sequence are formed on one side surface of the substrate 31, and at least two second microchannel units 312 arranged in sequence are formed on the other side surface of the substrate 31. The first microchannel units 311 and the second microchannel units 312 are arranged in an interleaved manner, and the end of the first microchannel unit 311 is communicated with the head of the second microchannel unit 312, and the end of the second microchannel unit 312 is communicated with the head of the next first microchannel unit 311.

[0055] Compared with the prior art, the micro reaction channel provided by the present invention is composed of a plurality of first micro channel units 311 and second micro channel units 312 connected in sequence. The first micro channel units 311 and the second micro channel units 312 located on both sides of the substrate 31 are connected end to end in sequence, so that the medium to be mixed rolls and flows on both sides of the substrate 31. In addition to the collision on a single plane, there is also an upward and downward rolling flow trend, which strengthens the turbulence effect, makes the reaction medium mix more evenly, avoids the problem of complex processing caused by different widths of the entire reaction channel, enables the reaction and flow effects of a medium with a certain concentration and a medium with solid particles of a certain diameter to also have a good mixing effect, has a simple structure, and is convenient for production and processing.

[0056] Further, please refer to Figure 1 and Figure 3 As a specific embodiment of the micro reaction channel provided by the present invention, both the first micro channel unit 311 and the second micro channel unit 312 adopt an "arrow" structure, and the arrow direction of the first micro channel unit 311 is opposite to the arrow direction of the second micro channel unit 312. The first micro channel unit 311 includes a first main flow channel 3111 and two first branch flow channels 3112 located on both sides of the first main flow channel 3111. One end of the two first branch flow channels 3112 is connected to the head end of the first main flow channel 3111; the second micro channel unit 312 includes a second main flow channel 3121 and two second branch flow channels 3122 located on both sides of the second main flow channel 3121. One end of the second branch flow channel 3122 is connected to the tail ends of the two second main flow channels 3121; the tail end of the first main flow channel 3111 is connected to the head end of the second main flow channel 3121 through a first communication hole 3131, and one end of the first branch flow channel 3112 far from the first main flow channel 3111 is connected to one end of the second branch flow channel 3122 far from the second main flow channel 3121 through a second communication hole 3132. Specifically, the flow mode of the reaction medium in the first micro channel unit 311 is: entering from the second communication holes 3132 at the ends of the two first branch flow channels 3112 on both sides, and colliding and mixing at the mixing place of the two first branch flow channels 3112 and the first main flow channel 3111. The mixed reaction medium enters the second micro channel unit 312 through the first main flow channel 3111 and the first communication hole 3131; in the second micro channel unit 312: the reaction medium entering the second main flow channel 3121 is dispersed into the two second branch flow channels 3122 on both sides at the tail end of the second main flow channel 3121, and the reaction medium in the second branch flow channel 3122 then flows through the second communication hole 3132 into the next first micro channel unit 311, so as to realize the flow of all the reaction medium, and continuously collide and roll up and down during the flow process, strengthening the turbulence effect and making the medium mix more evenly.

[0057] Preferably, in order to enable the reaction medium to collide more rapidly at the connection between the first branch channel 3112 and the first main channel 3111, a narrowing area is provided at the connection between the first branch channel 3112 and the first main channel 3111, that is, the channel on the side of the first branch channel 3112 close to the first main channel 3111 becomes narrower, and the channel on the side of the first main channel 3111 close to the first branch channel 3112 also becomes narrower. The width of the channel at the outer end of the first branch channel 3112 is larger and the flow rate is slower. The channel at the connection of the first branch channel 3112 suddenly shrinks, so that the flow rate of the reaction medium in the channel is accelerated, and its mixing impact force is stronger, and a better mixing effect can be achieved. Similarly, for the second microchannel unit 312, a narrowing area is also provided at the connection between the second branch channel 3122 and the second main channel 3121, so that the reaction medium to be mixed can be divided into two streams and enter the two second branch channels 3122 respectively, and enter the second communication hole 3132 from the second branch channel 3122, thereby enhancing the mixing effect.

[0058] Preferably, the first microchannel unit 311 and the second microchannel unit 312 are symmetrically arranged at intervals, that is, the size and specification of the first main channel 3111 are the same as those of the second main channel 3121, and the size and specification of the first branch channel 3112 are also the same as those of the second branch channel 3122. Moreover, the width of the first main channel 3111 is greater than the width of the first branch channel 3112, and the width of the second main channel 3121 is greater than the width of the second branch channel 3122. Since the first communication hole 3131 is used to connect the first main channel 3111 and the second main channel 3121, and the second communication hole 3132 is used to connect the first branch channel 3112 and the second branch channel 3122, the diameter of the first communication hole 3131 is greater than the diameter of the second communication hole 3132, so as to ensure the flow rate of the liquid.

[0059] Preferably, the ratio range of the diameter of the first communication hole 3131 to the diameter of the second communication hole 3132 is taken as 1.2 to 1.8, that is, the aperture of the first communication hole 3131 is 1.2 to 1.8 times the aperture of the second communication hole 3132, and preferably the aperture of the first communication hole 3131 is 1.5 times the aperture of the second communication hole 3132. The channel depths of the first main channel 3111 and the first branch channel 3112, as well as the second main channel 3121 and the second branch channel 3122, are all uniform. The channel width of the first main channel 3111 and the second main channel 3121 in the narrowing area is a, and the diameter of the first communication hole 3131 is b. The ratio range of the width value a to the diameter b of the first communication hole 3131 is taken as 0.5 to 0.9, and preferably the width value a is 0.6 to 0.7 times the diameter b of the first communication hole 3131.

[0060] Among them, the channel widths of the first main channel 3111, the first branch channel 3112, the second main channel 3121, and the second branch channel 3122 can be in the range of 0.5 mm to 10 mm. At this time, the reaction channel is not only applicable to laboratory-level process development but also can be used for large-scale production at the industrial level. The entire channel is composed of continuous and smooth channels and can be compatible with high-viscosity fluids to participate in the reaction.

[0061] Example 2

[0062] Please refer to Figure 2 and Figure 3 , as another specific embodiment of the microreaction channel provided by the present invention, the difference between this embodiment and Embodiment 1 lies in the different shapes of the first microchannel unit 311 and the second microchannel unit 312. In this embodiment, the shapes and directions of the first microchannel unit 311 and the second microchannel unit 312 are the same or the first microchannel unit 311 and the second microchannel unit 312 are symmetrically arranged, and the first microchannel unit 311 and the second microchannel unit 312 are arranged at intervals. The shapes of the first microchannel unit 311 and the second microchannel unit 312 are both heart-shaped, and an arc-shaped channel is connected to the bottom end of the heart shape.

[0063] Specifically, the first microchannel unit 311 includes a third main channel 3113, third branch channels 3114 and fourth branch channels 3115 located on both sides of the third main channel 3113. One end of the third branch channel 3114 is connected to the head end of the third main channel 3113, and one end of the fourth branch channel 3115 is connected to the tail end of the third main channel 3113; that is, the numbers of the third branch channels 3114 and the fourth branch channels 3115 are both two, and they are respectively arranged on opposite sides of the third main channel 3113. The third branch channels 3114 and the fourth branch channels 3115 extend toward both sides from the head end and the tail end of the third main channel 3113 respectively.

[0064] The second microchannel unit 312 includes a fourth main channel 3123, fifth branch channels 3124 and sixth branch channels 3125 located on both sides of the fourth main channel 3123. One end of the fifth branch channel 3124 is connected to the head end of the fourth main channel 3123, and one end of the sixth branch channel 3125 is connected to the tail end of the fourth main channel 3123; that is, the numbers of the fifth branch channels 3124 and the sixth branch channels 3125 are both two, and they are respectively arranged on opposite sides of the fourth main channel 3123. The fifth branch channels 3124 and the sixth branch channels 3125 extend toward both sides from the head end and the tail end of the fourth main channel 3123 respectively.

[0065] Moreover, one end of the fourth branch channel 3115 away from the third main channel 3113 is connected to one end of the fifth branch channel 3124 away from the fourth main channel 3123 through a third communication hole 3133. One end of the sixth branch channel 3125 away from the fourth main channel 3123 is connected to one end of the third branch channel 3114 of the next first microchannel unit 311 away from the third main channel 3113 through a fourth communication hole 3134. That is, the fourth branch channel 3115 is connected to the fifth branch channel 3124 through the third communication hole 3133. The fifth branch channel 3124 is connected to the sixth branch channel 3125 through the fourth main channel 3123. Then the sixth branch channel 3125 is connected to the third branch channel 3114 of the first microchannel unit 311 in the next cycle. Moreover, the third branch channel 3114 is connected to the fourth main channel 3123 through the third main channel 3113, so as to realize the connection and flow between several first microchannel units 311 and second microchannel units 312. And through the continuous flow state of the reaction medium to be mixed in the microreaction channel from "combination" to "separation" and then to "combination", and then from "combination" to "separation", and accompanied by the up-and-down tumbling trend, it can effectively intensify the mixing between the media and has a higher heat transfer efficiency.

[0066] Further, the third main channel 3113 is used to connect the third branch channel 3114 and the fourth branch channel 3115. The third main channel 3113 is directly connected to the outer edge of the third branch channel 3114 on the side close to the third branch channel 3114 to form a communication area. And the third main channel 3113 is only connected to the middle connection part of the fourth branch channel 3115 on the side close to the fourth branch channel 3115. That is, the third main channel 3113 gradually narrows when approaching the fourth branch channel 3115 to form a narrowing area. At this time, the third main channel 3113 and the third branch channel 3114 form a shape similar to a heart, and the third main channel 3113 and the fourth branch channel 3115 form a shape of an arrow.

[0067] The shape of the second microchannel unit 312 is the same as that of the first microchannel unit 311. That is, the fourth main channel 3123 is directly connected to the outer edge of the fifth branch channel 3124 on the side close to the fifth branch channel 3124 to form a communication area. And the fourth main channel 3123 is only connected to the middle connection part of the sixth branch channel 3125 on the side close to the sixth branch channel 3125. That is, the fourth main channel 3123 gradually narrows when approaching the sixth branch channel 3125 to form a narrowing area. At this time, the fourth main channel 3123 and the fifth branch channel 3124 form a shape similar to a heart, and the fourth main channel 3123 and the sixth branch channel 3125 form a shape of an arrow.

[0068] Preferably, the diameters of the third communication holes 3133 and the fourth communication holes 3134 are equal. Also, due to the arrangement of the communication area and the narrowing area, the width of one side of the third branch channel 3114 is greater than the width of the fourth branch channel 3115, and the width of the fifth branch channel 3124 is greater than the width of the sixth branch channel 3125.

[0069] The narrowing area is located on the side of the third main channel 3113 close to the fourth branch channel 3115 and also on the side of the fourth main channel 3123 close to the sixth branch channel 3125. The width c of the narrowing area is less than the diameters d of the third communication holes 3133 and the fourth communication holes 3134. The ratio range of the diameters d of the third communication holes 3133 and the fourth communication holes 3134 to the width value c of the narrowing area is taken as 1.2 to 2. Preferably, the diameters d of the third communication holes 3133 and the fourth communication holes 3134 are 1.5 times the width value c of the narrowing area.

[0070] Among them, the flow channel widths of the third main channel 3113, the third branch channel 3114, the fourth branch channel 3115, the fourth main channel 3123, the fifth branch channel 3124, and the sixth branch channel 3125 can be in the range of 0.5 mm to 10 mm. At this time, the reaction flow channel is not only applicable to laboratory-level process development but also can be used for large-scale production at the industrial level. The entire flow channel is composed of continuous and smooth channels and can be compatible with high-viscosity fluids to participate in the reaction.

[0071] Example 3

[0072] Please refer to Figures 4 to 6 , Figures 10 to 12 and Figure 16 , the present invention also provides a reaction substrate 3, and now the reaction substrate 3 provided by the present invention will be described. The reaction substrate 3 includes a substrate 31 and a cover plate 32. At least two groups of micro reaction channels as described in Example 1 or Example 2 and connection channels 314 connecting two adjacent micro reaction channels are respectively provided on both sides of the substrate 31; the cover plate 32 is located on opposite sides of the substrate 31, and the two cover plates 32 respectively cover the first microchannel unit 311 and the second microchannel unit 312.

[0073] The reaction substrate 3 provided by the present invention directly processes slots on the substrate 31 to respectively form a first microchannel unit 311, a second microchannel unit 312, and a connection channel 314. A plurality of mutually connected first microchannel units 311 and second microchannel units 312 are arranged on each substrate 31. The medium to be mixed can flow and tumble up and down in the microreaction channel for mixing. The cover plate 32 covers the opposite side surfaces of the substrate 31, and the cover plate 32 is fixedly connected to the substrate 31 and seals the openings on the first microchannel unit 311, the second microchannel unit 312, and the connection channel 314, so that a pipe with an outer edge seal can be formed between the first microchannel unit 311, the second microchannel unit 312, the connection channel 314, and the cover plate 32, and only an inlet and an outlet are formed at both ends. Its processing method is simple, and it can be processed by machining, etching, precision carving, electric discharge machining, etc. according to the material properties.

[0074] Among them, a plurality of microreaction channels arranged side by side are provided on one substrate 31, and each microreaction channel is formed by sequentially connecting a plurality of first microchannel units 311 and second microchannel units 312 end to end. The ends of adjacent two microreaction channels can be connected through the connection channel 314, that is, the first microchannel unit 311 or the second microchannel unit 312 at the end of the upper row of microreaction channels is connected to the first microchannel unit 311 or the second microchannel unit 312 of the lower row of microreaction channels through the connection channel 314, so that the medium to be mixed can flow in each row of microreaction channels and finally flow out from the medium flow outlet. The connection channel 314 includes channels connecting the microreaction channels to the first medium inlet hole 4, the second medium inlet hole 5, and the medium outlet hole 6 respectively, and the connection channel 314 also includes a channel connecting adjacent two microreaction channels.

[0075] Among them, the flow direction of the microreaction channel can be the same direction. At this time, the connection channel 314 extends relatively long and is connected from the end of one side of the microreaction channel to the top of the other microreaction channel; the flow direction of the microreaction channel can also be the opposite direction. At this time, the connection channel 314 directly connects from the end of one side of the microreaction channel to the end of the other microreaction channel, or it can be connected from the top of one side of the microreaction channel to the top of the other microreaction channel, and the distance of the connection channel 314 is shorter.

[0076] Further, please refer to Figures 4 to 6 and Figures 10 to 12, as a specific embodiment of the micro reaction channel provided by the present invention, the substrate 31 is a thick plate body, the first microchannel unit 311 and the second microchannel unit 312 are respectively grooves formed on the substrate 31, and a communication hole 313 communicating with the first microchannel unit 311 and the second microchannel unit 312 is formed on the substrate 31. That is, at this time, the first microchannel unit 311 and the second microchannel unit 312 are respectively arranged on opposite sides of the same substrate 31, and a communication hole 313 is also formed on the substrate 31. At this time, the plate material can be saved, and it can be directly formed on a single plate body, and only the cover plate 32 needs to be arranged on the opposite sides of the plate body to form a complete and sealed micro reaction channel.

[0077] Wherein, a first medium inlet hole 4, a second medium inlet hole 5 and a medium outlet hole 6 are formed on both the substrate 31 and the cover plate 32. The first medium inlet hole 4 and the second medium inlet hole 5 are both communicated with the end of the micro reaction channel located outside through a connection channel 314, and the medium outlet hole 6 is communicated with the end of the micro reaction channel located on the other side. A medium is injected into the first medium inlet hole 4, and another medium is injected into the second medium inlet hole 5. After the two media are mixed evenly in the micro reaction channel, they flow out from the medium outlet hole 6. Among them, the first medium inlet hole 4 and the second medium inlet hole 5 can be connected to the micro reaction channel through a connection channel 314, or can be respectively connected to the micro reaction channel through two connection channels 314.

[0078] Heat exchange medium flow holes 7 are also formed on both the substrate 31 and the cover plate 32. The heat exchange medium flow holes 7 are used to connect the pipelines in the heat exchange unit plate 2.

[0079] Further, referring to Figure 16 , as a specific embodiment of the reaction substrate 3 provided by the present invention, the cover plate 32 can directly be a flat plate body, and the flat plate body is fixedly attached to one side of the reaction substrate 3, and the cover plate 32 is fixedly bonded to the substrate 31 at the outer edges of the first microchannel unit 311 and the second microchannel unit 312, so as to prevent the medium to be mixed from directly entering the next micro reaction channel through the gap between the cover plate 32 and the micro reaction channel.

[0080] The cover plate 32 can also be a plate body, and grooves symmetrical to the first microchannel unit 311, the second microchannel unit 312 and the connection channel 314 are formed on the plate body. After the grooves and the micro reaction channel are joined together, a deeper pipeline can be formed, so that the flow rate of the reaction substrate 3 is larger, and it can be compatible with reactions involving solids with a certain particle diameter and can also be compatible with reactions involving high-viscosity fluids, reducing the volume of the reactor and reducing the consumption of consumables.

[0081] Example 4

[0082] Refer to Figures 7 to 10 and Figures 13 to 15 As another specific embodiment of the microreaction channel provided by the present invention, the difference between this embodiment and Embodiment 3 is that: in this embodiment, the substrate 31 is formed by splicing three plate bodies, and partial flow channels are respectively processed on each plate body, and a complete microreaction channel is formed after splicing. Specifically, the substrate 31 includes a first plate body 315, a second plate body 316 opposite to the first plate body 315, and an intermediate plate body 317 located between the first plate body 315 and the second plate body 316. The first microchannel unit 311 is a through groove opened on the first plate body 315; the second microchannel unit 312 is a through groove opened on the second plate body 316; a through hole 313 communicating the first microchannel unit 311 and the second microchannel unit 312 is opened on the intermediate plate body 317. At this time, the first plate body 315, the second plate body 316, and the intermediate plate body 317 are processed separately, and they can be directly assembled after processing. At this time, the through groove and the through hole 313 can both be directly processed by machining, laser cutting, etching, precision carving, electric discharge machining, etc. The processing method of the entire substrate 31 is simple, with high flexibility in use and wider adaptability.

[0083] Embodiment 5

[0084] Please refer to Figures 16 to 18 , the present invention also provides a microchannel reactor, which includes a reaction substrate 3 as described in Embodiment 3 or Embodiment 4, heat exchange unit plates 2 located on opposite sides of the reaction substrate 3, and side plates 1 located outside the heat exchange unit plates 2.

[0085] The microchannel reactor provided by the present invention adopts a vacuum diffusion bonding technology, which is beneficial to strengthening the pressure resistance of the product, reducing the volume of the reactor, and reducing consumables. When in use, the material, size of the plate itself, and the number of channel units arranged in series or parallel can also be changed according to the properties of the fluid medium, reaction time, and production volume requirements.

[0086] Among them, the side plate 1 is a protective partition plate arranged at the outer edge of the heat exchange unit plate 2. Through this side plate 1, the reaction substrate 3 and the heat exchange unit plate 2 can be enclosed to ensure the sealing effect of the entire microchannel reactor. The adjacent side plate 1, reaction substrate 3, and heat exchange unit plate 2 are fixedly connected, and the fixed connection method can be bonding or welding, etc. The materials of the side plate 1, heat exchange unit plate 2, and reaction substrate 3 are extensive. They can be made of common metal materials such as stainless steel, Hastelloy, titanium and titanium alloys, zirconium and zirconium alloys, etc., or non-metallic materials such as silicon carbide and glass, or other materials with good corrosion resistance can be selected according to requirements.

[0087] The heat exchange unit plate 2 is internally provided with a specific channel structure for the heat exchange fluid to carry away or provide heat when flowing. The heat exchange unit plate 2 can be processed from a raw material plate through corresponding processing methods, or can be assembled by multiple layers of structural plates, and different methods can be selected according to different needs.

[0088] Among them, heat exchange medium flow holes 7, a first medium inlet hole 4, a second medium inlet hole 5 and a medium outlet hole 6 are also formed on the heat exchange unit plate 2 and the side plate 1. And the heat exchange medium flow holes 7, the first medium inlet hole 4, the second medium inlet hole 5 and the medium outlet hole 6 formed on the heat exchange unit plate 2 and the side plate 1 are in relative positions and communicate with the heat exchange medium flow holes 7, the first medium inlet hole 4, the second medium inlet hole 5 and the medium outlet hole 6 on the reaction substrate 3. For the heat exchange medium flow holes 7, the first medium inlet hole 4, the second medium inlet hole 5 and the medium outlet hole 6, they can be not blocked during use, and the unused hole positions can be blocked when not in use.

[0089] Obviously, the above embodiments are only examples for clear illustration and not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. A microreaction channel is provided on a substrate (31), characterized in that: The micro reaction channel includes a first micro channel unit (311) and a second micro channel unit (312). On one side of the substrate (31), at least two of the first micro channel units (311) are arranged in sequence. On the other side of the substrate (31), at least two of the second micro channel units (312) are arranged in sequence. The first micro channel unit (311) and the second micro channel unit (312) are arranged in an interleaved manner, and the end of the first micro channel unit (311) is communicated with the head end of the second micro channel unit (312), and the end of the second micro channel unit (312) is communicated with the head end of the next first micro channel unit (311); The first micro channel unit (311) includes a first main flow channel (3111) and first branch flow channels (3112) located on both sides of the first main flow channel (3111). One end of the first branch flow channel (3112) is communicated with the head end of the first main flow channel (3111); The second micro channel unit (312) includes a second main flow channel (3121) and second branch flow channels (3122) located on both sides of the second main flow channel (3121). One end of the second branch flow channel (3122) is communicated with the end of the second main flow channel (3121); The end of the first main flow channel (3111) is communicated with the head end of the second main flow channel (3121) through a first communication hole (3131). The end of the first branch flow channel (3112) far from the first main flow channel (3111) is communicated with the end of the second branch flow channel (3122) far from the second main flow channel (3121) through a second communication hole (3132); A narrowing area is provided at the connection of the first main flow channel (3111) and the first branch flow channel (3112); a narrowing area is also provided at the connection of the second main flow channel (3121) and the second branch flow channel (3122); The diameter of the first communication hole (3131) is larger than the diameter of the second communication hole (3132); Both the first micro channel unit (311) and the second micro channel unit (312) adopt an arrow structure, and the arrow direction of the first micro channel unit (311) is opposite to the arrow direction of the second micro channel unit (312).

2. The reaction substrate is characterized in that, Including: A substrate (31) with at least two groups of the micro reaction channels as described in claim 1 and connection channels (314) connecting two adjacent micro reaction channels are respectively provided on both sides thereof; and a cover plate (32) located on opposite sides of the substrate (31), and the two cover plates (32) respectively cover the first micro channel unit (311) and the second micro channel unit (312).

3. The reaction substrate according to claim 2, wherein: The substrate (31) is a thick plate body, the first micro channel unit (311) and the second micro channel unit (312) are respectively grooves opened on the substrate (31), and through holes (313) respectively communicating with the first micro channel unit (311) and the second micro channel unit (312) are opened on the substrate (31).

4. The reaction substrate according to claim 2, wherein The substrate (31) includes: The first plate body (315), wherein the first microchannel unit (311) is a through groove formed on the first plate body (315); The second plate body (316) facing the first plate body (315), wherein the second microchannel unit (312) is a through groove formed on the second plate body (316); and the intermediate plate body (317) located between the first plate body (315) and the second plate body (316), and a through hole (313) communicating the first microchannel unit (311) and the second microchannel unit (312) is formed on the intermediate plate body (317).

5. The reaction substrate according to claim 2, wherein: The first medium inlet hole (4), the second medium inlet hole (5) and the medium outlet hole (6) are formed on both the substrate (31) and the cover plate (32). The first medium inlet hole (4) and the second medium inlet hole (5) are respectively communicated with the first ends of the first microchannel unit (311) or the second microchannel unit (312), and the medium outlet hole (6) is communicated with the second ends of the first microchannel unit (311) or the second microchannel unit (312).

6. The reaction substrate according to claim 5, wherein: The heat exchange medium circulation holes (7) are formed on both the substrate (31) and the cover plate (32).

7. Microchannel reactor, characterized in that: It includes the reaction substrate according to any one of claims 2 to 6.

8. The microchannel reactor according to claim 7, wherein: It further includes heat exchange unit plates (2) located on opposite sides of the reaction substrate and side plates (1) located outside the heat exchange unit plates (2).

9. The microchannel reactor according to claim 8, characterized in that: The heat exchange medium circulation holes (7), the first medium inlet hole (4), the second medium inlet hole (5) and the medium outlet hole (6) are formed on both the heat exchange unit plates (2) and the side plates (1).

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