Microreactor for fluid reaction
By designing flow guide structures in the microreactor, multiple diversions and confluences of the fluid are achieved, solving the problem of poor mixing effect in microchannel reactors and improving mixing, heat transfer, and mass transfer efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-24
- Publication Date
- 2026-03-27
AI Technical Summary
Existing microchannel reactors have poor mixing effects, and the dynamics and control mechanisms of multiphase flow require further research. Novel microchannel reactors are yet to be developed.
Design a microreactor containing multiple reaction chambers within a substrate. Through the cooperation of flow guides, multiple flow splits and confluences of the fluid are achieved. The structural features of the flow guides are used to improve the disturbance and collision of the fluid, thereby enhancing the mixing, heat transfer, and mass transfer efficiency.
Through multiple diversions and mergings, the mixing, heat and mass transfer efficiency of the fluid is significantly improved, thereby enhancing the reaction effect.
Smart Images
Figure CN224040919U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to fluid reactor technical field, concretely relates to a kind of microreactor for fluid reaction. BACKGROUND
[0002] Chemical equipment such as reactor, separator is the hardware foundation of chemical production process, and is closely related to the safety, energy consumption and efficiency of the whole production process. Among them, the microreactor has the advantages of fast heat and mass transfer rate, high safety, low process energy consumption, high integration, small amplification effect and strong controllability due to the reduction of internal channel feature size, which is of great significance to improve the selectivity and yield of target product, the comprehensive utilization rate of resources and energy, and the energy saving and emission reduction and sustainable development of chemical process. At the same time, the microreactor can be used for isothermal operation of fast exothermic / endothermic reaction, fast mixing between two phases, synthesis of flammable and explosive compounds, on-site production of toxic compounds, etc., and has good application prospect.
[0003] The existing microchannel reactor has poor mixing effect, and the complex multiphase flow movement and regulation law in the microchannel reactor need further research, and new microchannel reactors need to be developed. UTILITY MODEL CONTENT
[0004] The technical problem to be solved by the utility model is how to improve the mixing efficiency of the microchannel reactor.
[0005] The technical solution for solving the above technical problem of the utility model is as follows:
[0006] The utility model provides a kind of microreactor for fluid reaction, including base body, be equipped with multiple reaction cavities in the base body, and multiple reaction cavities are connected by channel head and tail;First flow guide piece and second flow guide piece located at the two sides of first flow guide piece are equipped in the reaction cavity, first flow guide piece is equipped with strip-shaped front part, the two ends of the strip-shaped front part extend to the two sides of the inlet flow direction of reaction cavity, and in the inlet flow direction of reaction cavity, the end part of strip-shaped front part partially shields second flow guide piece.
[0007] The utility model has the advantages that:
[0008] The utility model realizes multiple splitting and merging of fluid from entering reaction cavity to leaving reaction cavity by the cooperation of first flow guide piece and second flow guide piece located at the two sides of first flow guide piece, increases the disturbance and collision of fluid, improves the mixing, heat transfer and mass transfer efficiency, and the reaction effect is good;At the same time, the two ends of the strip-shaped front part of first flow guide piece extend to the two sides of the inlet flow direction of reaction cavity, which is convenient for changing the flow direction of fluid after first splitting, and then the inner wall of reaction cavity is used to change the flow direction of fluid again, and the mixing and mass transfer effect is improved.
[0009] On the basis of the above technical solutions, the utility model further can make improvement as follows.
[0010] Further, the first flow guide piece is further provided with a dovetail-shaped tail part, and arc-shaped grooves are arranged on both sides of a region between the strip-shaped front part and the dovetail-shaped tail part of the first flow guide piece.
[0011] After the fluid is again split under the disturbance of the second flow guide piece, the two streams of fluid change flow directions under the action of the arc-shaped grooves and the inner wall of the reaction cavity, so as to facilitate the convergence of the two streams of fluid after passing the second flow guide piece, and improve the mixing and mass transfer effect.
[0012] Further, the second flow guide piece is in the shape of a water droplet, and the head part of the second flow guide piece is circular and extends into the groove.
[0013] Preferably, the diameter of the head part of the second flow guide piece is h, the distance from the center of the head part of the second flow guide piece to the bottom of the groove is i, h:i = 1:2; the distance from the tail part of the second flow guide piece to the inner wall of the reaction cavity is j, and the width of the channel is a, a:j = 1:0.3. In the embodiment, h is preferably 0.2-4 mm, more preferably 0.5-2 mm, and particularly 0.5, 1 or 2 mm.
[0014] In the embodiment, the tip of the tail part of the second flow guide piece is rounded, so as to facilitate gentle processing and reduce water resistance.
[0015] The resistance of the second flow guide piece is reduced, and the flow channels in the groove are uniform, so as to reduce the consumption of fluid kinetic energy.
[0016] Further, the second flow guide piece is in the shape of an arc-shaped water droplet and the concave side faces the end of the strip-shaped front part of the first flow guide piece.
[0017] The vortex effect during the splitting of the fluid is promoted, and the mixing and mass transfer efficiency is improved.
[0018] Further, the strip-shaped front part of the first flow guide piece is arc-shaped and the concave side thereof is opposite to the inlet of the reaction cavity, and the inlet of the reaction cavity is convex inward; the dovetail-shaped tail part of the first flow guide piece is arc-shaped and the convex side thereof is opposite to the outlet of the reaction cavity, and the outlet of the reaction cavity is concave outward.
[0019] Preferably, the width of the channel is a, the width of the reaction cavity is b, the distance between the inlet and the outlet of the reaction cavity is c, the distance from the inlet of the reaction cavity to the concave side of the middle part of the strip-shaped front part of the first flow guide piece is d, the length of the strip-shaped front part of the first flow guide piece is e, the width of the dovetail-shaped tail part of the first flow guide piece is f, and the distance from the dovetail-shaped tail part of the first flow guide piece to the outlet of the reaction cavity is g; the relationship between a, b, c, d, e, f and g is as follows:
[0020] a:b = 1:(4~8);
[0021] b:c = 1:(0.5~1);
[0022] a:d = 1:(1~2.5);
[0023] b:e = 1:(0.4~0.8);
[0024] e:f = 1:(0.2~0.8)
[0025] a:g = 1:(0.2~1.5);
[0026] h:i = 1:(1.5~4);
[0027] a:j = 1:(0.2~2).
[0028] By the cooperation of the arc-shaped long-strip front part with the inner convex inlet of the reaction cavity and the cooperation of the arc-shaped dovetail-shaped tail part with the outer concave outlet of the reaction cavity, uniform flow and turning are realized when fluid is divided and combined, resistance is reduced, and mixing effect is improved.
[0029] Further, the width of the reaction cavity gradually decreases from the inlet side to the outlet side.
[0030] By the inner convex inlet, the outer concave outlet and the continuously decreasing width, the reaction cavity forms a heart shape, which can promote the change of the flow state of fluid from division to combination, and improve the mass transfer effect.
[0031] Further, the channel is circular or square, which is convenient to manufacture and low in cost.
[0032] Further, the plurality of reaction cavities are arranged in a serpentine shape, which occupies small space and is convenient to arrange compactly on a substrate.
[0033] Further, two feed branches are arranged on the channel at the inlet end of the first reaction cavity.
[0034] The two fluid reaction materials are convenient to connect. BRIEF DESCRIPTION OF DRAWINGS
[0035] Fig. 1 It is a structural schematic view of the utility model.
[0036] Fig. 2 It is an enlarged detail view of the structure of the reaction cavity.
[0037] Fig. 3 It is a schematic view of the size configuration relationship of the reaction cavity.
[0038] In the drawings, the technical features represented by the reference signs are as follows:
[0039] 1-Matrix; 2-Reaction chamber; 3-Channel; 4-First flow guide; 5-Second flow guide. Detailed Implementation
[0040] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.
[0041] This utility model refers to Figs. 1-3 .
[0042] This invention provides a microreactor for fluid reactions, comprising a substrate 1, wherein the substrate 1 has multiple reaction chambers 2, which are connected end to end by channels 3; each reaction chamber 2 has a first flow guide 4 and second flow guides 5 located on both sides of the first flow guide 4, the first flow guide 4 having an elongated front portion, both ends of the elongated front portion extending toward both sides of the inlet flow direction of the reaction chamber 2, and the end portion of the elongated front portion blocking the second flow guide 5 in the inlet flow direction of the reaction chamber 2.
[0043] principle:
[0044] This invention can be used for liquid-liquid two-phase reactions or gas-liquid two-phase reactions. During operation, an external pipeline is connected to the inlet channel 3 of the first reaction chamber 2. The reaction fluid from the external pipeline enters through the inlet channel 3 of the first reaction chamber 2, flows through each reaction chamber 2 sequentially, and exits from the outlet of the last reaction chamber 2. When the fluid enters the reaction chamber 2, it is first diverted by the turbulent effect of the elongated front of the first guide member 4. After each fluid passes the end of the elongated front, it is diverted again by the turbulent effect of the second guide member 5. Each fluid then merges after passing the second guide member 5, then merges again after passing the first guide member 4, and finally flows out from the outlet of the reaction chamber 2.
[0045] In this embodiment, the first guide member 4 and the two second guide members 5 are both columnar arranged parallel to each other, and both ends of them are connected to the base 1. Preferably, the base 1 is a square plate.
[0046] This invention, through the cooperation of the first guide member 4 and the second guide members 5 located on both sides of the first guide member 4, enables the fluid to undergo multiple diversions and recombinations during its journey from entering the reaction chamber 2 to leaving the reaction chamber 2. This increases the disturbance and collision of the fluid, improves the mixing, heat transfer, and mass transfer efficiency, and results in a better reaction effect. At the same time, the two ends of the elongated front of the first guide member 4 extend towards both sides of the inlet flow direction of the reaction chamber 2, which facilitates changing the flow direction of the fluid after the first diversion. Furthermore, the inner wall of the reaction chamber 2 is used to change the flow direction of the fluid again, thereby improving the mixing and mass transfer effect.
[0047] Further, the first flow guide 4 is also provided with a dovetail-shaped tail, and the area between the long-strip-shaped front part of the first flow guide 4 and the dovetail-shaped tail is provided with arc-shaped grooves on both sides.
[0048] After the fluid is again divided under the disturbance of the second flow guide 5, the two streams of fluid change the flow direction under the action of the arc-shaped grooves and the inner wall of the reaction cavity 2, so as to facilitate the convergence after passing the second flow guide 5 and improve the mixing and mass transfer effect.
[0049] Further, the second flow guide 5 is in the shape of a water droplet, and the head of the second flow guide 5 is circular and extends into the groove.
[0050] Preferably, the diameter of the head of the second flow guide 5 is h, the distance from the center of the head of the second flow guide 5 to the bottom of the groove is i, h:i = 1:2; the distance from the tail of the second flow guide 5 to the inner wall of the reaction cavity 2 is j, and the width of the channel 3 is a, a:j = 1:0.3. In this embodiment, h is preferably 0.2-4 mm; more preferably 0.5-2 mm, and particularly 0.5, 1 or 2 mm.
[0051] In this embodiment, the tip of the tail of the second flow guide 5 is rounded. This facilitates gentle handling and reduces water resistance.
[0052] This facilitates the reduction of the resistance of the second flow guide 5, while the flow channels in the groove are uniform, reducing the consumption of fluid kinetic energy.
[0053] Further, the second flow guide 5 is in the shape of an arc-shaped water droplet with the concave side facing the end of the long-strip-shaped front part of the first flow guide 4.
[0054] Preferably, the second flow guide 5 is symmetrically distributed on both sides of the first flow guide 4, and the symmetry axis is the central axis of the reaction cavity 2.
[0055] This promotes the vortex effect when the fluid is divided, improving the mixing and mass transfer efficiency.
[0056] Further, the long-strip-shaped front part of the first flow guide 4 is arc-shaped with the concave side in the middle facing the inlet of the reaction cavity 2, and the inlet of the reaction cavity 2 is convex inward; the dovetail-shaped tail of the first flow guide 4 is arc-shaped with the convex side facing the outlet of the reaction cavity 2, and the outlet of the reaction cavity 2 is concave outward.
[0057] Note: The inside of the reaction cavity 2 is a hollow cavity, and the outside is a solid body, so the solid body extends into the inside of the reaction cavity 2 to be convex inward, and the hollow cavity expands outward to be concave outward.
[0058] Preferably, the width of the channel 3 is a, the width of the reaction chamber 2 is b, the distance between the inlet and the outlet of the reaction chamber 2 is c, the distance between the inlet of the reaction chamber 2 and the middle of the concave side of the long strip-shaped front part of the first flow guide 4 is d, the length of the long strip-shaped front part of the first flow guide 4 is e, the width of the dovetail-shaped tail part of the first flow guide 4 is f, the distance between the dovetail-shaped tail part of the first flow guide 4 and the outlet of the reaction chamber 2 is g; the relationship between a, b, c, d, e, f, g is as follows:
[0059] a:b = 1:(4-8);
[0060] b:c = 1:(0.5-1);
[0061] a:d = 1:(1-2.5);
[0062] b:e = 1:(0.4-0.8);
[0063] e:f = 1:(0.2-0.8)
[0064] a:g = 1:(0.2-1.5);
[0065] h:i = 1:(1.5-4);
[0066] a:j = 1:(0.2-2).
[0067] In the embodiment, specifically, a:b is preferably 1:(5-7), more preferably 1:(5.5-6.5). b:c is preferably 1:(0.5-0.8), more preferably 1:(0.6-0.8). a:d is preferably 1:(1-2), more preferably 1:(1-1.4). b:e is preferably 1:(0.5-0.7). e:f is preferably 1:(0.3-0.7), more preferably 1:(0.4-0.6). a:g is preferably 1:(0.4-1), more preferably 1:(0.6-0.8). h:i is preferably 1:(2-3.5), more preferably 1:(2-3). a:j is preferably 1:(0.2-1.5), more preferably 1:(0.2-1). More specifically, a:b = 1:6.2; b:c = 1:0.6; a:d = 1:1.2; b:e = 1:0.6; e:f = 1:0.4; a:g = 1:0.7.
[0068] In the embodiment, a is preferably 0.5-10 mm; more preferably 1-5 mm, particularly 1, 3 or 5 mm. h is preferably 0.2-4 mm; more preferably 0.5-2 mm, particularly 0.5, 1 or 2 mm.
[0069] In the embodiment, the arc-shaped long-strip front part of the first flow guide 4 can be a circular arc, a parabolic arc or a catenary arc, and is preferably a circular arc.
[0070] In addition, preferably, the distance between the inlet of the reaction cavity 2 and the inlet side end of the reaction cavity 2 is k, and k≥0.
[0071] Through the cooperation of the arc-shaped long-strip front part with the inner convex inlet of the reaction cavity 2 and the cooperation of the arc-shaped dovetail-shaped tail part with the outer concave outlet of the reaction cavity 2, uniform flow and turning are achieved when the fluid is divided and merged, the resistance is reduced, and the mixing effect is improved.
[0072] Further, the width of the reaction cavity 2 gradually decreases from the inlet side to the outlet side.
[0073] In the embodiment, the reaction cavity 2 is a three-dimensional heart-shaped cavity or a columnar heart-shaped cavity with a heart-shaped cross section. The three-dimensional heart-shaped cavity has a better mixing effect but is more difficult to process. Conversely, the columnar heart-shaped cavity with a heart-shaped cross section is easier to process but has a mixing effect inferior to that of the three-dimensional heart-shaped cavity.
[0074] Through the inner convex inlet, the outer concave outlet and the continuously decreasing width, the reaction cavity 2 forms a heart shape, which can promote the change of the flow state of the fluid from division to merging and improve the mass transfer effect.
[0075] Further, the channel 3 is circular or square. It is convenient to manufacture and has low cost.
[0076] In the embodiment, when the channel 3 is circular, the diameter is a, and when the channel 3 is square, the side length is a, i.e. the width of the channel 3 is a.
[0077] Further, the plurality of reaction cavities 2 are arranged in a snakelike manner. It occupies less space and is convenient to arrange compactly on the base 1.
[0078] In the embodiment, at least one heart-shaped reaction cavity 2 is connected head to tail through the channel 3 to form a heart-shaped reaction cavity 2 array; two adjacent heart-shaped reaction cavity 2 arrays are arranged in reverse parallel and connected through the channel 3 to form a U shape.
[0079] Further, two feed branches are arranged on the channel 3 at the inlet end of the first reaction cavity 2.
[0080] It is convenient to connect two streams of fluid reaction materials.
[0081] In the description of the utility model, it is understood that if the description of the indicated direction, direction or position relation appears, for example: "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like, the direction or position relation indicated in the specification is based on the direction or position relation shown in the drawing, only for the convenience of understanding the utility model and simplifying the description, and it is not indicated or implied that the indicated part, element or whole must have a specific direction, be constructed and operated in a specific direction, therefore it can not be understood as a limitation on the utility model.
[0082] In addition, if the order description language appears, for example: "first", "second" and the like, the use in the specification is for the convenience of understanding or simplifying the description, for example, in order to distinguish a plurality of technical features of the same type or function, and it is necessary to mention separately, the specification can adopt the way of prefix or suffix order description language to distinguish them. Therefore, it can not be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one feature. In the description of the utility model, the meaning of "a plurality of" is at least two, for example, two, three and the like, unless otherwise specifically limited.
[0083] In the utility model, if the structure relative action relation description language is adopted, for example: "installation", "connection", "connection", "fixing" and the like, unless otherwise specified and limited, it should be understood in a broad sense. For example, "installation", "connection", "connection" and the like, can be fixed connection, or detachable connection, or integrated; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through intermediate medium, can be the communication or interaction between two elements; "fixed" can be integrated fixed, or detachable fixed through fastener; can be direct fixation, or fixation through intermediate medium. For ordinary skilled in the art, the specific meaning of the above description language in the utility model can be understood according to the specific situation, the context, the text meaning coherence and the like.
[0084] In the utility model, if the description language containing the accessory or the connection meaning appears, for example, the first feature is on or under the second feature, unless another explicit provision and limitation, should not be limited understanding, for example, on or under can be the first and second features directly contact, also can be the first feature and the second feature indirectly contact through the intermediate medium. For the ordinary skilled person in the art, can understand the specific meaning of the above description language in the utility model according to specific circumstances, the context, the text meaning coherence of the preceding and following text etc.
[0085] Further, the first feature is on, above and on the second feature can be the first feature is directly above or obliquely above the second feature, or just indicates that the first feature is higher than the second feature in horizontal height. The first feature is below, under and under the second feature can be the first feature is directly below or obliquely below the second feature, or just indicates that the first feature is less than the second feature in horizontal height.
[0086] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, the skilled in the art can combine and combine the different embodiments, examples and features of different embodiments, examples described in the specification without contradiction, which should be included in the scope of the utility model.
[0087] Although the embodiments of the utility model have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the utility model, and the skilled in the art can obtain the information in the public channel within the scope of the disclosure, and the above embodiments are changed, modified, replaced and modified according to the technical inspiration given in the present application file, which can still be covered in the protection scope of the present application.
Claims
1. A microreactor for fluid reactions, characterized in that: The system includes a substrate (1), which contains multiple reaction chambers (2) connected end to end by a channel (3). Each reaction chamber (2) contains a first guide (4) and a second guide (5) located on both sides of the first guide (4). The first guide (4) has a long strip-shaped front portion, the two ends of which extend toward the inlet flow direction of the reaction chamber (2). In the inlet flow direction of the reaction chamber (2), the end portion of the long strip-shaped front portion blocks the second guide (5).
2. The microreactor for fluid reactions according to claim 1, characterized in that: The first guide member (4) is also provided with a dovetail-shaped tail. The area between the elongated front part and the dovetail-shaped tail part of the first guide member (4) is provided with arc-shaped grooves on both sides. The second guide member (5) extends into the groove.
3. The microreactor for fluid reactions according to claim 2, characterized in that: The second guide (5) is teardrop-shaped, and the head of the second guide (5) is round and extends into the groove.
4. The microreactor for fluid reactions according to claim 3, characterized in that: The diameter of the head of the second guide (5) is h, the distance from the center of the head of the second guide (5) to the bottom of the groove is i, h:i = 1:2; the distance from the tail of the second guide (5) to the inner wall of the reaction chamber (2) is j, and the width of the channel (3) is a, a:j = 1:0.
3.
5. The microreactor for fluid reaction according to claim 3, characterized in that: The second guide (5) is in the shape of an arc-shaped teardrop and the concave side faces the end of the long strip-shaped front part of the first guide (4).
6. The microreactor for fluid reactions according to claim 1, characterized in that: The first guide member (4) has an arc-shaped front section and the concave side of the middle section is directly opposite the inlet of the reaction chamber (2), and the inlet of the reaction chamber (2) is convex inward; the first guide member (4) has an arc-shaped tail section and the convex side is directly opposite the outlet of the reaction chamber (2), and the outlet of the reaction chamber (2) is concave outward.
7. The microreactor for fluid reaction according to claim 6, characterized in that: The width of the channel (3) is a, the width of the reaction chamber (2) is b, the distance between the inlet and outlet of the reaction chamber (2) is c, the distance from the inlet of the reaction chamber (2) to the middle of the concave side of the elongated front of the first guide (4) is d, the length of the elongated front of the first guide (4) is e, the width of the dovetail of the first guide (4) is f, and the distance from the dovetail of the first guide (4) to the outlet of the reaction chamber (2) is g; the relationship between a, b, c, d, e, f, and g is: a:b = 1:(4~8); b:c = 1:(0.5~1); a:d = 1:(1~2.5); b:e = 1:(0.4~0.8); e:f = 1:(0.2~0.8) a:g = 1:(0.2~1.5); h:i = 1:(1.5~4); a:j = 1:(0.2~2).
8. The microreactor for fluid reactions according to claim 6, characterized in that: The width of the reaction chamber (2) gradually decreases from its inlet side to its outlet side.
9. The microreactor for fluid reactions according to claim 1, characterized in that: The channel (3) is circular or square.
10. The microreactor for fluid reactions according to claim 1, characterized in that: The multiple reaction chambers (2) are arranged in a serpentine pattern; the inlet end of the first reaction chamber (2) is provided with two feed branches on the channel (3).