Microreactor

Abstract

The utility model relates to the technical field of fluid mixing reaction devices, and discloses a microreactor. The micro-reactor comprises a reaction plate, a flow channel is concavely arranged on the reaction plate, the flow channel comprises a feeding area, a mixed reaction area and a discharging channel which are communicated in sequence, the feeding area comprises a first feeding channel, a second feeding channel and a premixing channel, the second feeding channel is located in the first feeding channel, the extending direction of the second feeding channel is the same as that of the first feeding channel, and the premixing channel is located in the second feeding channel. One end of the pre-mixing channel is respectively communicated with the discharging ends of the first feeding channel and the second feeding channel, and the other end of the pre-mixing channel is communicated with the mixing reaction area. According to the microreactor, in the feeding process, two kinds of fluid cannot collide, mutual influence of the two kinds of fluid due to large flow velocity difference is avoided, and compared with the prior art, premixing of the two kinds of fluid is better facilitated, so that the premixing effect and the uniformity degree of the two kinds of fluid are improved, and subsequent full mixing reaction of the two kinds of fluid is better facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of fluid mixing reaction devices, in particular to a microreactor. Background Art

[0002] A microreactor is a device used for mixed reactions of one or more fluid materials. The size of its reaction channel is usually in the micrometer to millimeter level, which is particularly advantageous for liquid-liquid and gas-liquid reactions.

[0003] In the prior art, two feed channels are usually arranged on the reaction plate of the microreactor, and the two feed channels are arranged at an angle, and one end where the two feed channels converge is connected to the premixing channel, and the outlet end of the premixing channel is connected to the reaction channel. The two fluids to be mixed are respectively injected into the corresponding feed channels, and the two fluids flow along their respective feed channels, converge and enter the premixing channel for premixing, and the premixed fluids enter multiple reaction channels for mixed reaction.

[0004] However, since the two feed channels are arranged at an angle, the two fluids will collide with each other during the process of the two fluids entering the premixing channel through the two feed channels respectively. Especially for the case of gas-liquid mixing, the flow rates of the gas and the liquid are quite different. During the collision, the liquid can easily cut off the gas, resulting in poor and uneven premixing of the two fluids, which is not conducive to the full mixing reaction between the fluids in the subsequent reaction channel.

[0005] Therefore, it is urgent to provide a microreactor to solve the above problems. Utility Model Content

[0006] The utility model aims to provide a microreactor, which can solve the technical problems of poor and uneven premixing effect of two fluids.

[0007] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0008] A microreactor comprises a reaction plate, on which a flow channel is recessed, the flow channel comprises a feed zone, a mixing reaction zone and a discharge channel which are connected in sequence, the feed zone comprises a first feed channel, a second feed channel and a premixing channel, the second feed channel is located in the first feed channel and has the same extension direction as the first feed channel, one end of the premixing channel is respectively connected to the discharge ends of the first feed channel and the second feed channel, and the other end of the premixing channel is connected to the mixing reaction zone.

[0009] As an optional scheme, the first feed channel includes a connected main feed channel and two feed branch channels, a blocking member is provided in the feed area, the blocking member is arranged adjacent to the discharge end of the main feed channel, the blocking member is U-shaped and opens toward the premixing channel, the second feed channel is formed in the blocking member, and two symmetrically arranged feed branch channels are formed between the blocking member and the outer contour of the feed area.

[0010] As an optional solution, the feed end of the first feed channel is provided with a first feed hole, and / or the feed end of the second feed channel is provided with a second feed hole, and / or the discharge end of the discharge channel is provided with a discharge hole.

[0011] As an optional scheme, the premixing channel includes a connected premixing chamber and a premixing discharge channel, the premixing chamber is connected to the discharge ends of the first feed channel and the second feed channel respectively, the premixing discharge channel is connected to the mixing reaction zone, and the width of the premixing discharge channel is smaller than the width of the premixing chamber.

[0012] As an optional solution, a spoiler is convexly provided in the premixing chamber.

[0013] As an optional solution, the width of the outlet end of the premixing discharge channel gradually decreases along the direction of fluid flow.

[0014] As an optional scheme, the mixing reaction zone includes a plurality of mixing units and a plurality of confluence channels, and each adjacent two mixing units are connected by a confluence channel. The mixing unit located at the head end is connected to the premixing channel, and the mixing unit located at the end is connected to the discharge channel.

[0015] As an optional solution, the mixing unit includes a reaction chamber and a flow baffle disposed in the reaction chamber, and two symmetrically arranged branch channels are formed between a side wall of the flow baffle and a side wall of the reaction chamber.

[0016] As an optional solution, the baffle is X-shaped, and the diversion channel includes an impact zone, a first bend zone, a waist zone, a second bend zone and a mixing zone connected in sequence, and the width of the waist zone gradually increases and then gradually decreases along the flow direction of the fluid.

[0017] As an optional solution, the confluence channel includes an expansion channel and a tapered channel, the tapered channel is connected to the discharge end of the expansion channel, the width of the expansion channel gradually increases along the direction of fluid flow, and the width of the tapered channel gradually decreases along the direction of fluid flow.

[0018] The beneficial effects of the utility model are:

[0019] The microreactor provided by the utility model, when in use, first injects the first fluid of the two fluids that need to be mixed and reacted into the first feed channel, and the second fluid is injected into the second feed channel, the first fluid flows along the first feed channel, the second fluid flows along the second feed channel, and then the first fluid and the second fluid enter the premixing channel together for premixing, the premixed fluid enters the mixed reaction zone for mixed reaction, and the fluid after the mixed reaction flows out through the discharge flow channel. Since the second feed channel is located in the first feed channel and has the same extension direction as the first feed channel, therefore, during the feeding process, the two fluids will only flow along their respective feed channels until they flow into the premixing channel, and before entering the premixing channel, the two fluids have the same flow direction, so the two fluids will not collide, and the two fluids are prevented from affecting each other due to the large difference in flow rate, so compared with the prior art, it is more conducive to the premixing of the two fluids, especially the case of gas-liquid mixing, thereby improving the premixing effect and uniformity of the two fluids, and further more conducive to the subsequent full mixing reaction of the two fluids. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to explain the embodiments of the utility model or the technical solutions in the prior art more clearly and easily, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. The drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 This is a schematic diagram of the structure of the microreactor provided in the embodiment of the utility model. Figure 1 ;

[0022] Figure 2 This is a schematic diagram of the structure of the microreactor provided in the embodiment of the utility model. Figure 2 ;

[0023] Figure 3 is an exploded view of a microreactor provided in an embodiment of the utility model;

[0024] Figure 4 The structure of the reaction plate provided by the embodiment of the utility model is shown in FIG. Figure 1 ;

[0025] Figure 5 yes Figure 4 A partial enlarged view of the middle A;

[0026] Figure 6 The structure of the reaction plate provided by the embodiment of the utility model is shown in FIG. Figure 2 ;

[0027] Figure 7 yes Figure 6 A partial enlarged view of point B in the middle;

[0028] Figure 8 It is a structural schematic diagram of a reaction plate provided by another embodiment of the utility model.

[0029] In the figure:

[0030] 100, reaction plate; 200, first cover plate; 201, feed port; 300, first heat exchange plate; 301, heat exchange chamber; 400, second heat exchange plate; 500, second cover plate; 501, discharge port; 502, liquid inlet and outlet;

[0031] 10. Feeding area; 11. First feeding channel; 111. Main feeding channel; 112. Branch feeding channel; 113. First feeding hole; 12. Second feeding channel; 121. Second feeding hole; 13. Premixing channel; 131. Premixing chamber; 132. Premixing discharge channel; 133. Spoiler; 14. Blocker;

[0032] 20. Mixing reaction zone; 21. Mixing unit; 211. Reaction chamber; 212. Flow blocking member; 213. Diverter channel; 2131. Impact zone; 2132. First bend zone; 2133. Waist zone; 2134. Second bend zone; 2135. Mixing zone; 22. Converging channel; 221. Expanding channel; 222. Gradually contracting channel;

[0033] 30. Discharge channel; 31. Discharge hole;

[0034] 40. Series pipes. DETAILED DESCRIPTION

[0035] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0036] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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 a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0038] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0039] like Figures 1 to 3 This embodiment provides a microreactor, including a first cover plate 200, a first heat exchange plate 300, a reaction plate 100, a second heat exchange plate 400, and a second cover plate 500 which are stacked in sequence. The reaction plate 100 is a place where two fluids are mixed and reacted. The first heat exchange plate 300 and the second heat exchange plate 400 are respectively sealed on both sides of the reaction plate 100 to cool the fluid reaction. The first cover plate 200, the first heat exchange plate 300, the reaction plate 100, the second heat exchange plate 400, and the second cover plate 500 are made of silicon carbide or glass, etc., and are formed by bonding and packaging.

[0040] like Figures 4 to 5 As shown, a flow channel is recessed on one side of the reaction plate 100 and the first heat exchange plate 300, and the first heat exchange plate 300 can seal and cover the flow channel to ensure the sealing of the flow channel. The flow channel is used for mixing and reacting two fluids, which can be liquid and liquid, or liquid and gas, and no specific limitation is made here. The flow channel includes a feed zone 10, a mixed reaction zone 20 and a discharge channel 30 connected in sequence. The feed zone 10 includes a first feed channel 11, a second feed channel 12 and a premixing channel 13. The first feed channel 11 is used for the flow of the first fluid, the second feed channel 12 is used for the flow of the second fluid, and the premixing channel 13 is used for premixing the first fluid and the second fluid. The second feed channel 12 is located in the first feed channel 11 and has the same extension direction as the first feed channel 11. One end of the premixing channel 13 is connected to the discharge ends of the first feed channel 11 and the second feed channel 12, respectively, and the other end of the premixing channel 13 is connected to the mixed reaction zone 20.

[0041] When in use, the first fluid is injected into the first feed channel 11, and the second fluid is injected into the second feed channel 12. The first fluid flows along the first feed channel 11, and the second fluid flows along the second feed channel 12. Then, the first fluid and the second fluid enter the premixing channel 13 together for premixing. The premixed fluid enters the mixing reaction zone 20 for mixing reaction, and the fluid after the mixed reaction flows out through the discharge channel 30. Since the second feed channel 12 is located in the first feed channel 11 and has the same extension direction as the first feed channel 11, during the feeding process, the two fluids will only flow along their respective feed channels until they flow into the premixing channel 13. Before entering the premixing channel 13, the two fluids have the same flow direction, so the two fluids will not collide, and the two fluids are prevented from affecting each other due to the large difference in flow rate. Therefore, compared with the prior art, it is more conducive to the premixing of the two fluids, especially the gas-liquid mixing, thereby improving the premixing effect and uniformity of the two fluids, and further more conducive to the subsequent full mixing reaction of the two fluids.

[0042] like Figure 4 and Figure 5 As shown, the first feed channel 11 includes a connected feed main channel 111 and two feed branch channels 112. Specifically, a blocking member 14 is provided in the feed zone 10. The blocking member 14 is arranged adjacent to the discharge end of the feed main channel 111. The blocking member 14 is U-shaped and opens toward the premixing channel 13. The second feed channel 12 is formed in the blocking member 14. Two symmetrically arranged feed branch channels 112 are formed between the blocking member 14 and the outer contour of the feed zone 10, that is, the two feed branch channels 112 are symmetrically arranged on both sides of the blocking member 14. The blocking member 14 can block the first feed channel 11 and the second feed channel 12 so that the fluids in the two do not affect each other. The first fluid is injected into the main feed channel 111, flows along the main feed channel 111 first, and then splits into two paths and flows into the two feed branch channels 112 respectively and flows along the feed branch channels 112 until entering the premixing channel 13. The second fluid is injected into the second feed channel 12 and flows directly along the second feed channel 12 until entering the premixing channel 13. The flow direction of the first fluid in the main feed channel 111 and the flow direction after entering the feed branch channel 112 are the same as the flow direction of the second fluid in the second feed channel 12. Therefore, the two fluids will not collide during the feeding process and will not affect each other, which is more conducive to the premixing of the two fluids.

[0043] like Figure 4 and Figure 5As shown, the premixing channel 13 includes a premixing chamber 131 and a premixing discharge channel 132 which are connected to each other. One end of the premixing chamber 131 is respectively connected to the discharge ends of the first feed channel 11 and the second feed channel 12. The premixing discharge channel 132 is connected to the mixing reaction zone 20. The width of the premixing discharge channel 132 is smaller than the width of the premixing chamber 131. When the two fluids flow from the premixing chamber 131 into the premixing discharge channel 132, it is equivalent to flowing from a wide channel into a narrow channel, thereby achieving the effect of increasing the fluid flow rate and improving the mass transfer efficiency.

[0044] That is to say, Figure 5 As shown, it is equivalent to opening a groove on the reaction plate 100, the groove is a waist-shaped groove, one end of the groove is connected to the main feed channel 111, and the width is greater than the width of the main feed channel 111, and a U-shaped blocking member 14 is convexly provided at the bottom of the groove, the open end of the blocking member 14 faces the premixing channel 13, and the closed end faces the main feed channel 111, and a second feed channel 12 is formed in the blocking member 14, and the blocking member 14 and the side wall of the groove jointly define two symmetrical feed branch channels 112, and the rest of the groove forms the above-mentioned premixing chamber 131.

[0045] In an optional embodiment, if Figure 5 As shown, a spoiler 133 is convexly provided in the premixing chamber 131. After the first fluid and the second fluid enter the premixing chamber 131 together, the fluids are split into two paths when passing through the spoiler 133, increasing the disturbance of the fluids. After passing through the spoiler 133, the two fluids collide with each other and undergo the first intense mixing. The spoiler 133 is preferably cylindrical, and of course, the spoiler 133 may also be a polygonal column or other shapes, which are not specifically limited here.

[0046] In an optional embodiment, if Figure 6 and Figure 7 As shown, the width of the outlet end of the premixing discharge channel 132 gradually decreases along the direction of fluid flow. Among them, the outlet end of the premixing discharge channel 132 is an end of the premixing discharge channel 132 connected to the mixing reaction zone 20. When the fluid enters the mixing reaction zone 20 from the premixing discharge channel 132, the flow velocity increases rapidly through the contraction structure at the outlet end of the premixing discharge channel 132, and rushes to the mixing reaction zone 20, further improving the mass transfer efficiency and facilitating the mixing of the fluid.

[0047] In an optional embodiment, if Figure 4 and Figure 5 As shown, the feeding end of the first feeding channel 11 is provided with a first feeding hole 113, specifically, the feeding end of the main feeding channel 111 is provided with a first feeding hole 113, and the feeding end of the second feeding channel 12 is provided with a second feeding hole 121. Figure 1 and Figure 3, two feed ports 201 are provided at corresponding positions of the first cover plate 200 and the first heat exchange plate 300, one of which corresponds to and is connected with the first feed hole 113, and the other corresponds to and is connected with the second feed hole 121. The first fluid to be reacted can be injected into the first feed hole 113 through one of the feed ports 201, and then enter the main feed channel 111 through the first feed hole 113; the second fluid to be reacted can be injected into the second feed hole 121 through the other feed port 201, and then enter the second feed channel 12 through the second feed hole 121, thereby facilitating the feeding of the two fluids.

[0048] like Figure 6 As shown, the discharge end of the discharge channel 30 is provided with a discharge hole 31, and the reacted fluid can flow out of the flow channel from the discharge hole 31. In an optional embodiment, a flow channel is also recessed on the side where the reaction plate 100 and the second heat exchange plate 400 are attached, and the flow channel on this side also includes a mixing reaction zone 20 and a discharge channel 30, and the discharge hole 31 is a through hole to connect the flow channels on both sides. For ease of description, the side where the reaction plate 100 and the first heat exchange plate 300 are attached is defined as the first side, and the side where the reaction plate 100 and the second heat exchange plate 400 are attached is defined as the second side. The two fluids are first mixed and reacted in the flow channel on the first side, and the reacted fluid flows from the discharge hole 31 into the flow channel on the second side for further reaction until it flows into the end of the discharge channel 30 on the second side.

[0049] Recombination Figure 2 and Figure 3 The second cover plate 500 and the second heat exchange plate 400 are provided with a through discharge port 501 at corresponding positions, and the discharge port 501 corresponds to and is connected with the end position of the discharge channel 30 on the second side of the reaction plate 100. The reacted fluid can enter the discharge port 501 from the end of the discharge channel 30 on the second side of the reaction plate 100, and then be discharged from the microreactor through the discharge port 501, thereby facilitating the discharge process of the reacted fluid.

[0050] In an optional embodiment, if Figure 4 As shown, the mixing reaction zone 20 includes a plurality of mixing units 21 and a plurality of confluence channels 22, and each two adjacent mixing units 21 are connected by a confluence channel 22, the mixing unit 21 at the head end is connected to the premixing discharge channel 132, and the mixing unit 21 at the end is connected to the discharge channel 30. The fluid flowing out of the premixing discharge channel 132 can be repeatedly passed through the mixing unit 21 and the confluence channel 22 in sequence for mixing reaction, which effectively increases the stroke of the reaction channel, thereby increasing the reaction stroke and reaction time, so that the fluid material is fully mixed and reacted.

[0051] In an optional embodiment, if Figure 7As shown, the mixing unit 21 includes a reaction chamber 211 and a baffle 212 disposed in the reaction chamber 211. Two symmetrically arranged branch channels 213 are formed between the side wall of the baffle 212 and the side wall of the reaction chamber 211. The two branch channels 213 are connected to the premixed discharge channel 30. When the fluid enters the mixing unit 21 through the contraction structure at the outlet end of the premixed discharge channel 132, the flow velocity increases rapidly and rushes toward the baffle 212. The baffle 212 can block and interfere with the fluid, so that the fluid is divided into two streams and enters the branch channels 213 on both sides respectively, and finally merges. The widths of the various regions of the branch channel 213 are different, so that the fluid flows non-uniformly in the branch channel 213, increasing the collision frequency of the fluid, so that the fluid is fully mixed and the reaction rate is improved.

[0052] In an optional embodiment, if Figure 7 As shown, the baffle 212 is X-shaped, so that the widths of various areas of the diverter channel 213 are different. Specifically, the diverter channel 213 includes an impact zone 2131, a first bend zone 2132, a waist zone 2133, a second bend zone 2134 and a mixing zone 2135 that are connected in sequence. The width of the waist zone 2133 first gradually increases and then gradually decreases along the flow direction of the fluid. When the fluid enters the branch channel 213 through the contraction structure at the outlet end of the premixing discharge channel 132, the flow rate increases rapidly, and enters the impact zone 2131 to rush toward the baffle 212, and then is divided into two streams of fluid, first passing through the first bend zone 2132 for violent swirl to achieve a full mixing effect, and then the fluid passes through the waist zone 2133, the width of the waist zone 2133 first gradually increases, so that the flow rate decreases, and the pressure drop also decreases accordingly, which is also conducive to increasing the liquid holding capacity, and then the width of the waist zone 2133 gradually decreases again, so that the flow rate accelerates, and then quickly reaches the second bend zone 2134 to swirl again, and the two streams of fluid meet and collide in the mixing zone 2135, and mix again to ensure an ideal mixing effect, and at the same time, the outlet of the mixing zone 2135 is controlled at a certain width, which can significantly reduce the pressure drop at the outlet and improve the overall efficiency. Afterwards, the fluid enters the confluence channel 22 from the mixing zone 2135, and then enters the next mixing unit 21, and this cycle is repeated to achieve multiple diversions and mixing of the fluid, and the mixing effect is excellent.

[0053] In an optional embodiment, if Figure 7As shown, the confluence channel 22 includes an expansion channel 221 and a gradually contracting channel 222. The gradually contracting channel 222 is connected to the discharge end of the expansion channel 221. The width of the expansion channel 221 gradually increases along the direction of fluid flow, and the width of the gradually contracting channel 222 gradually decreases along the direction of fluid flow. The fluid first enters the expansion channel 221 from the mixing zone 2135. The expansion channel 221 is gradually expanded, which not only increases the liquid holding capacity, but also further reduces the pressure drop and improves the efficiency. Then the fluid enters the gradually contracting channel 222. The gradually contracting channel 222 is gradually contracted, which speeds up the flow rate, and then quickly enters the next mixing unit 21. This reciprocating cycle further improves the mixing effect of the fluid.

[0054] In an optional embodiment, if Figure 6 As shown, a plurality of mixing units 21 and confluence channels 22 are arranged in multiple rows and in a circuitous manner, and the ends of two adjacent rows are connected by a U-shaped series pipe 40 to extend the flow path of the fluid and perform a sufficient mixing reaction. Figure 8 As shown, several mixing units 21 and confluence channels 22 can also be arranged in a row. It should be noted that the number and arrangement of the mixing units 21 and confluence channels 22, and the size of the microreactor can be adaptively selected according to the actual required liquid holding capacity and residence time, which can be understood by those skilled in the art and are not specifically limited here.

[0055] like Figure 2 and Figure 3 As shown, a heat exchange cavity 301 is provided on both the first heat exchange plate 300 and the second heat exchange plate 400, and the heat exchange cavity 301 is distributed in a tortuous shape, wherein the heat exchange cavity 301 of the first heat exchange plate 300 is opened on the side where the first heat exchange plate 300 and the first cover plate 200 are attached, and the heat exchange cavity 301 of the second heat exchange plate 400 is opened on the side where the second heat exchange plate 400 and the second cover plate 500 are attached, the first cover plate 200 is used to seal the heat exchange cavity 301 of the first heat exchange plate 300, and the second cover plate 500 is used to seal the heat exchange cavity 301 of the second heat exchange plate 400. Two liquid inlets and outlets 502 are provided at corresponding positions of the second cover plate 500, the second heat exchange plate 400, the reaction plate 100 and the first heat exchange plate 300, wherein one of the liquid inlets and outlets 502 is used for the entry of heat exchange medium, and the other of the liquid inlets and outlets 502 is used for the discharge of heat exchange medium. The liquid inlet and outlet 502 on the first heat exchange plate 300 is communicated with the heat exchange cavity 301 on the first heat exchange plate 300, and the liquid inlet and outlet 502 on the second heat exchange plate 400 is communicated with the heat exchange cavity 301 on the second heat exchange plate 400.

[0056] The heat exchange medium is introduced into the first heat exchange plate 300 and the second heat exchange plate 400 from one of the liquid inlet and outlet ports 502 on the second cover plate 500. The heat exchange medium first flows into the heat exchange cavity 301 of the second heat exchange plate 400 from the liquid inlet and outlet ports 502 of the second heat exchange plate 400, and then flows into the heat exchange cavity 301 of the first heat exchange plate 300 from the liquid inlet and outlet ports 502 of the first heat exchange plate 300. The heat exchange medium flows in the heat exchange cavity 301 to take away heat, and then flows out of the heat exchange cavity 301 from the other liquid inlet and outlet port 502, and is finally discharged from the other liquid inlet and outlet port 502 on the second cover plate 500, thereby achieving efficient cooling, effectively improving the cooling efficiency of the fluid reaction, achieving a good balance between the reaction rate and the cooling efficiency of the fluid, and improving the overall reaction performance of the microreactor.

[0057] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled 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 implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A microreactor, comprising a reaction plate (100), wherein a flow channel is concavely provided on the reaction plate (100), characterized in that: The flow channel comprises a feed zone (10), a mixing reaction zone (20) and a discharge channel (30) which are connected in sequence; the feed zone (10) comprises a first feed channel (11), a second feed channel (12) and a premixing channel (13); the second feed channel (12) is located in the first feed channel (11) and has the same extension direction as the first feed channel (11); one end of the premixing channel (13) is respectively connected to the discharge ends of the first feed channel (11) and the second feed channel (12); the other end of the premixing channel (13) is connected to the mixing reaction zone (20).

2. The microreactor according to claim 1, characterized in that The first feed channel (11) comprises a main feed channel (111) and two feed branch channels (112) which are connected to each other. A blocking member (14) is provided in the feed zone (10). The blocking member (14) is arranged adjacent to the discharge end of the main feed channel (111). The blocking member (14) is U-shaped and opens toward the premixing channel (13). The second feed channel (12) is formed in the blocking member (14). Two symmetrically arranged feed branch channels (112) are formed between the blocking member (14) and the outer contour of the feed zone (10).

3. The microreactor according to claim 1, characterized in that The feed end of the first feed channel (11) is provided with a first feed hole (113), and / or the feed end of the second feed channel (12) is provided with a second feed hole (121), and / or the discharge end of the discharge channel (30) is provided with a discharge hole (31).

4. The microreactor according to claim 1, characterized in that The premixing channel (13) comprises a premixing chamber (131) and a premixing discharge channel (132) which are connected to each other; the premixing chamber (131) is connected to the discharge ends of the first feed channel (11) and the second feed channel (12), respectively; the premixing discharge channel (132) is connected to the mixing reaction zone (20); and the width of the premixing discharge channel (132) is smaller than the width of the premixing chamber (131).

5. The microreactor according to claim 4, characterized in that A spoiler (133) is protrudingly provided in the premixing chamber (131).

6. The microreactor according to claim 4, characterized in that The width of the outlet end of the premixing discharge channel (132) gradually decreases along the direction of fluid flow.

7. The microreactor according to any one of claims 1 to 6, characterized in that: The mixing reaction zone (20) comprises a plurality of mixing units (21) and a plurality of confluence channels (22), and each two adjacent mixing units (21) are connected via a confluence channel (22). The mixing unit (21) at the head end is connected to the premixing channel (13), and the mixing unit (21) at the end end is connected to the discharge channel (30).

8. The microreactor according to claim 7, characterized in that The mixing unit (21) comprises a reaction chamber (211) and a flow baffle (212) arranged in the reaction chamber (211), and two symmetrically arranged branch channels (213) are formed between the side wall of the flow baffle (212) and the side wall of the reaction chamber (211).

9. The microreactor according to claim 8, characterized in that The baffle (212) is X-shaped, and the flow divider (213) comprises an impact zone (2131), a first bend zone (2132), a waist zone (2133), a second bend zone (2134) and a mixing zone (2135) which are connected in sequence, and the width of the waist zone (2133) first gradually increases and then gradually decreases along the flow direction of the fluid.

10. The microreactor according to claim 7, characterized in that: The converging channel (22) comprises an expansion channel (221) and a tapered channel (222), wherein the tapered channel (222) is connected to the discharge end of the expansion channel (221), the width of the expansion channel (221) gradually increases along the direction of fluid flow, and the width of the tapered channel (222) gradually decreases along the direction of fluid flow.

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