Micro-channel reactor
By designing a mixing channel unit and optimizing the channel structure in a microchannel reactor, combined with 3D printing technology, the problems of insufficient mixing intensity and large pressure drop in existing microreactors are solved, efficient mixing and heat exchange are achieved, and the high-throughput requirements of industrialization are met.
Patent Information
- Application Number
- CN202422786179.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-15
- Publication Date
- 2025-10-17
- Estimated Expiration
- 2034-11-15
AI Technical Summary
When the flow channel size of existing microreactors is at the micron and millimeter level, the mixing intensity is insufficient and the pressure drop is large, making it difficult to meet the high-throughput requirements when it is equivalently scaled up to the industrial level.
A microchannel reactor is designed, which adopts a mixing flow channel unit, including a first channel, a second channel and a reflux channel. The fluids collide in the mixing flow channel unit. The reaction core and heat exchange shell are manufactured by combining 3D printing technology to optimize the flow channel structure and heat exchange mode.
It achieves efficient mixing of fluids under a small pressure drop, improves mixing intensity and heat transfer effect, and adapts to the large flux requirements of industrial level.
Smart Images
Figure CN223439814U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to chemical equipment technical field, concretely relates to a micro -channel reactor. BACKGROUND
[0002] Micro -reactor technology is also called micro -chemical technology, and it is an extremely important development direction of modern chemical technology. Using micro -reactor technology, chemical engineers can develop new production processes, realize the accurate control to reaction process, obtain higher reaction yield and selectivity, realize the continuous and automation of reaction process. Meanwhile, micro -reactor technology eliminates the magnification effect of process, and the best reaction condition of pilot process can be directly used in industrial production, thereby greatly shortening the process development time.
[0003] The flow channel size of the current micro -reactor is generally micron and millimeter level, and it mainly reflects the accurate control;When equivalent amplification to industrialization level, especially when large flux demand, it is not good to amplify, and the main problems are large pressure drop, insufficient mixing intensity and the like. UTILITY MODEL CONTENT
[0004] For the problems existing in the prior art, the utility model provides a micro -channel reactor, and the mixing intensity is big, and the mixing effect is good, and the fluid pressure drop can be effectively reduced.
[0005] In order to realize the above-mentioned purpose, the technical scheme adopted by the utility model is as follows:
[0006] The utility model provides a micro -channel reactor, including reaction core, the reaction core is provided with several reaction flow channels, and the reaction flow channel is equipped with several mixing flow channel units;
[0007] The mixing flow channel unit includes first channel, second channel and reflux channel;The reflux channel is located on the downstream side of the second channel and is communicated;
[0008] The fluid in the reaction flow channel enters the mixing flow channel unit and flows into the first channel and the second channel respectively, and forms first fluid and second fluid;The first fluid flows out of the first channel and collides with the second fluid flowing out of the reflux channel.
[0009] In the above-mentioned micro -channel reactor, the split angle α between the first channel and the second channel is 10 ° ~ 60 °.
[0010] In the above-mentioned micro -channel reactor, the direction of the second fluid flowing out of the reflux channel and the direction of the first fluid flowing out of the first channel have a confluence angle β, and the confluence angle β is less than 90 °.
[0011] In the micro-channel reactor, the convergence angle β is 30-70°.
[0012] In the micro-channel reactor, two adjacent mixing flow channel units are connected head to tail or are spaced apart in the fluid flow direction of the reaction flow channel.
[0013] And / or, the first channel and the second channel are straight channels.
[0014] And / or, the return flow channel is an arc-shaped channel, and in the fluid flow direction of the reaction flow channel, the concave side of the return flow channel is located upstream of the convex side.
[0015] And / or, the mixing flow channel unit further comprises an inlet channel located on the upstream side of the first channel and the second channel and communicating the first channel and the second channel; the inlet channel is trumpet-shaped, and in the fluid flow direction of the reaction flow channel, the flow cross section of the downstream side of the inlet channel is greater than that of the upstream side.
[0016] And / or, the mixing flow channel unit comprises a reverse impact mixing area located downstream of the return flow channel and the first channel and communicating the return flow channel and the first channel; the flow cross section of the reverse impact mixing area is greater than that of the first channel and the return flow channel.
[0017] And / or, the reaction core is manufactured by a 3D printing technology.
[0018] In the micro-channel reactor, the reaction core is provided with a feeding area and a discharging area, the feeding area is provided with at least a first inlet and a second inlet, the discharging area is provided with an outlet, and the reaction flow channel communicates the feeding area and the discharging area.
[0019] In the micro-channel reactor, the first inlet is opposite to the discharging direction of the second inlet; and the first inlet is located on the downstream side of the second inlet.
[0020] And / or, the feeding direction of the first inlet is perpendicular to the feeding direction of the second inlet.
[0021] In the micro-channel reactor, further comprising a heat exchange shell, the reaction core is located in the inner cavity of the heat exchange shell; the heat exchange shell is provided with two heat exchange cavities, and the two heat exchange cavities are respectively located on opposite sides of the reaction core.
[0022] In the micro-channel reactor, a plurality of first heat exchange flow channels are arranged in the reaction core, the first heat exchange flow channels pass through the reaction core and communicate the two heat exchange cavities.
[0023] And / or, the first channel, the second channel and the backflow channel surround to form an intermediate island, a second heat exchange flow channel is arranged in the intermediate island, the second heat exchange flow channel penetrates the reaction core and communicates two heat exchange cavities.
[0024] In the micro-channel reactor, the side of the intermediate island corresponding to the position where the first channel and the second channel communicate is an upwardly convex arc surface.
[0025] And / or, the flow direction of the first heat exchange flow channel and the second heat exchange flow channel is perpendicular to the flow direction of the reaction flow channel.
[0026] And / or, the heat exchange shell is manufactured by a 3D printing technology.
[0027] The micro-channel reactor has the advantages that:
[0028] The reaction flow channel of the micro-channel reactor fully and efficiently mixes the fluid through the mixing flow channel unit; after the first fluid flows out from the first channel and the second fluid flows out from the backflow channel, the two fluids collide and produce disturbance vortex, so that excellent mixing strength can be realized under a small pressure drop.
[0029] The heat exchange cavities are arranged on the opposite sides of the reaction core, so that the heat exchange demand of the reaction core is met; meanwhile, the flow direction of the first heat exchange flow channel and the second heat exchange flow channel is perpendicular to the flow direction of the fluid in the reaction flow channel, so that the heat transfer effect is good and the yield is improved.
[0030] The first heat exchange flow channel and the second heat exchange flow channel are distributed at positions where the reaction core is not provided with the reaction flow channel, so that the heat exchange of the reactor is enhanced. BRIEF DESCRIPTION OF DRAWINGS
[0031] Figure 1 It is a whole structure schematic view of an embodiment of the micro-channel reactor.
[0032] Figure 2 It is a sectional view of the reaction core in the micro-channel reactor.
[0033] Figure 3 It is Figure 2 It is an enlarged view of the A area.
[0034] Figure 4 It is a structure schematic view of the mixing flow channel unit in the micro-channel reactor.
[0035] In the drawing:
[0036] 100-heat exchange shell; 101-heat exchange outlet connecting pipe; 102-heat exchange inlet connecting pipe; 103-first heat exchange flow channel; 104-second heat exchange flow channel;
[0037] 200 - reaction core; 201 - first inlet; 202 - second inlet; 203 - outlet; 204 - reaction flow channel; 205 - mixing flow channel unit; 206 - intermediate island; 207 - first passage; 208 - feed zone; 209 - reverse impact mixing zone; 210 - second passage; 211 - inlet passage; 212 - backflow passage. DETAILED DESCRIPTION
[0038] For the convenience of those skilled in the art to understand, the utility model is further explained below in combination with the drawings.
[0039] Please refer to Figure 1 , Figure 2 , an embodiment of the micro-channel reactor provided by the utility model, comprising a heat exchange shell 100 and a reaction core 200, the reaction core 200 is located in the inner cavity of the heat exchange shell 100, and the heat exchange shell 100 forms a protection on the outside of the reaction core 200.
[0040] The reaction core 200 is provided with at least one reaction flow channel 204, and the reaction flow channel 204 has the effect of reverse flow impact mixing, which is conducive to improving the mixing intensity of the material. Figure 3 and Figure 4 As shown in FIGS. 1 and 2, each mixing flow channel unit 205 comprises an inlet passage 211, a first passage 207, a second passage 210, a backflow passage 212 and a reverse impact mixing zone 209.
[0041] In the flow direction of the fluid in the reaction flow channel 204, the inlet passage 211 is located on the upstream side of the first passage 207 and the second passage 210, and is connected to the reaction flow channel 204 to guide the fluid in the reaction flow channel 204 into the mixing flow channel unit 205. The first passage 207 and the second passage 210 adopt a parallel structure, and are both connected to the inlet passage 211. The inlet passage 211 is preferably trumpet-shaped, and the flow cross section of the downstream side thereof is larger than that of the upstream side, so as to gently guide the fluid to smoothly enter the first passage 207 and the second passage 210. In the mixing flow channel unit 205, the fluid in the reaction flow channel 204 is first divided into two streams in the first passage 207 and the second passage 210; hereinafter, the fluid entering the first passage 207 is referred to as the first fluid, and the fluid entering the second passage 210 is referred to as the second fluid.
[0042] Further, the flow division angle α between the first passage 207 and the second passage 210 is preferably in the range of 10°~60°, so as to ensure the flow division state.
[0043] The backflow channel 212 and the second channel 210 are in series, the upstream end of the backflow channel 212 communicates with the second channel 210, and the downstream end communicates with the reverse impact mixing area 209; the downstream end of the first channel 207 also communicates with the reverse impact mixing area 209.
[0044] The second fluid is output to the reverse impact mixing area 209 through the backflow channel 212, and the first fluid is output to the reverse impact mixing area 209 through the first channel 207. With respect to the flow direction of the fluid in the reaction flow channel 204, the backflow channel 212 guides the second fluid to flow countercurrently into the reverse impact mixing area 209, and the first fluid flows into the reverse impact mixing area 209; the first fluid and the second fluid collide in the reverse impact mixing area 209, so that the fluid generates strong disturbance vortex, accelerates the mixing of the material, and the mixing strength is high and the mixing effect is good. Therefore, the reaction flow channel 204 does not need to be provided with too many mixing flow channel units 205 to achieve the mixing requirement, so that the fluid pressure drop is greatly reduced; when equivalent amplification to the industrialization level is performed, the possibility of large flux demand is provided.
[0045] The first fluid flowing out of the first channel 207 and the second fluid flowing out of the backflow channel 212 have a flow convergence angle β, and the flow convergence angle β is preferably less than 90°, and more preferably 30°-70°, to ensure the best impact mixing effect.
[0046] One reaction flow channel 204 can be provided with one mixing flow channel unit 205, or can be provided with multiple mixing flow channel units 205; in the flow direction of the fluid in the reaction flow channel 204, two adjacent mixing flow channel units 205 are connected end to end, that is, the fluid flowing out of the reverse impact mixing area 209 enters the next mixing flow channel unit 205; or two adjacent mixing flow channel units 205 are spaced apart, and the fluid flowing out of the reverse impact mixing area 209 enters the reaction flow channel 204 and flows a certain flow path in the reaction flow channel 204 and then enters the next mixing flow channel unit 205.
[0047] As an embodiment of the mixing flow channel unit 205, the first channel 207 and the second channel 210 are straight channels and are distributed in the shape of an "eight"; the backflow channel 212 is an arc-shaped channel, and in the flow direction of the fluid in the reaction flow channel 204, the concave side of the backflow channel 212 is located upstream of the convex side, so that after the second fluid flows through the backflow channel 212, it flows countercurrently out of the backflow channel 212 and meets the first fluid; the two fluids collide with each other, so that the material is fully mixed.
[0048] Further, the flow cross section of the reverse impact mixing area 209 is much larger than the flow cross sections of the first channel 207 and the backflow channel 212, forming a sufficient fluid mixing space. After the first fluid and the second fluid enter the reverse impact mixing area 209, they are fully diffused and mixed, and the mixed fluid continues to flow downstream.
[0049] The reaction core 200 is provided with a feeding area 208, which is provided with at least a first inlet 201 and a second inlet 202, and two different substances enter the feeding area through the first inlet 201 and the second inlet 202 respectively. Preferably, the feeding direction of the first inlet 201 is perpendicular to the feeding direction of the second inlet 202, and the first inlet 201 is opposite to the discharging direction of the second inlet 202; the first inlet 201 is located on the downstream side of the second inlet 202, and the material entering the feeding area 208 from the second inlet 202 directly disperses the material input from the first inlet 201, so as to realize the preliminary mixing of the two materials. According to the different types of materials required in the reaction process, the feeding area 208 can also be provided with the required number of inlets. The reaction core 200 is also provided with a discharging area, which is communicated with an outlet 203.
[0050] The reaction core 200 is provided with at least one reaction flow channel 204, which is communicated with the feeding area 208 at the upstream and the discharging area at the downstream. The reaction core 200 can also be provided with multiple reaction flow channels 204, which can be arranged in parallel, that is, each reaction flow channel 204 is communicated with the feeding area 208 and the discharging area; the multiple reaction flow channels 204 can be arranged in series, and the reaction material enters the reaction core 200 from the feeding area 208 and flows through each reaction flow channel 204 in turn, and finally flows out of the reaction core 200 through the discharging area; or, the multiple reaction flow channels 204 are arranged in a combination of series and parallel as shown in the drawing. Figure 2
[0051] Further, the heat exchange shell 100 is provided with a heat exchange inlet connecting pipe 102 and a heat exchange outlet connecting pipe 101; the heat exchange shell 100 is provided with two heat exchange cavities, which are communicated with the heat exchange inlet connecting pipe 102 and the heat exchange outlet connecting pipe 101 respectively. The two heat exchange cavities are located on opposite sides of the reaction core 200, for example, as shown in the drawing, the heat exchange inlet connecting pipe 102 and the heat exchange outlet connecting pipe 101 are located on the upper and lower sides of the reaction core 200 respectively, and the two heat exchange cavities are located on the upper and lower sides of the reaction core 200 respectively. Figure 1
[0052] The reaction core 200 is provided with a plurality of first heat exchange flow channels 103, which are arranged in the area of the reaction core 200 where no reaction flow channel 204 or mixing flow channel unit 205 is arranged; the first heat exchange flow channel 103 is separated from and not communicated with the reaction flow channel 204. The first heat exchange flow channel 103 penetrates the reaction core 200, and communicates the heat exchange cavities on the upper and lower sides thereof, and exchanges heat with the reaction flow channel 204 through the first heat exchange flow channel 103.
[0053] The first channel 207, the second channel 210 and the backflow channel 212 preferably surround the intermediate island 206, and the second heat exchange flow channel 104 is preferably arranged in the intermediate island 206 and also penetrates the reaction core 200 to communicate the two heat exchange cavities, thereby enhancing the heat exchange capacity of the reaction core 200.
[0054] The side of the intermediate island 206 facing the inlet channel 211 is an arc surface convex to the upstream, which is beneficial to guide the fluid distribution.
[0055] The flow directions of the first heat exchange flow channel 103 and the second heat exchange flow channel 104 are perpendicular to the reaction flow channel 204, so that the heat exchange temperature is uniform throughout the flow of the reaction flow channel 204.
[0056] The reaction core 200 is manufactured by the 3D printing technology, or the heat exchange shell 100 and the reaction core 200 are integrally formed by the 3D printing technology.
[0057] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can be variously changed and modified. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A microchannel reactor, comprising a reaction core (200), wherein a plurality of reaction channels (204) are arranged in the reaction core (200), characterized in that: The reaction channel (204) is provided with a plurality of mixing channel units (205); The mixing channel unit (205) comprises a first channel (207), a second channel (210), and a reflux channel (212); the reflux channel (212) is located on the downstream side of the second channel (210) and is in communication with the second channel (210); After the fluid in the reaction channel (204) enters the mixing channel unit (205), it flows into the first channel (207) and the second channel (210) respectively, forming a first fluid and a second fluid; the first fluid flowing out of the first channel (207) in the downstream direction collides with the second fluid flowing out of the reflux channel (212) in the upstream direction.
2. A microchannel reactor according to claim 1, characterized in that, The split angle α between the first channel (207) and the second channel (210) is 10° to 60°.
3. A microchannel reactor according to claim 1, characterized in that, There is a confluence angle β between the direction in which the second fluid flows out of the reflux channel (212) and the direction in which the first fluid flows out of the first channel (207), and the confluence angle β is less than 90°.
4. A microchannel reactor according to claim 3, characterized in that, The confluence angle β is 30°~70°.
5. A microchannel reactor according to claim 1, characterized in that, In the fluid flow direction of the reaction channel (204), two adjacent mixing channel units (205) are connected end to end or arranged at intervals; And / or, the first channel (207) and the second channel (210) are straight channels; And / or, the reflux channel (212) is an arc-shaped channel, and in the flow direction of the fluid in the reaction channel (204), the inner concave side of the reflux channel (212) is located upstream of the outer convex side; And / or, the mixing channel unit (205) further comprises an inlet channel (211), the inlet channel (211) being located on the upstream side of the first channel (207) and the second channel (210), and communicating with the first channel (207) and the second channel (210); the inlet channel (211) being trumpet-shaped, and in the flow direction of the fluid in the reaction channel (204), the flow cross-section on the downstream side of the inlet channel (211) is larger than the flow cross-section on the upstream side thereof; And / or, the mixing channel unit (205) comprises a reverse impact mixing zone (209), the reverse impact mixing zone (209) being located downstream of the reflux channel (212) and the first channel (207) and communicating with the reflux channel (212) and the first channel (207); a flow cross-section of the reverse impact mixing zone (209) being larger than a flow cross-section of the first channel (207) and the reflux channel (212); And / or, the reaction core (200) is manufactured by 3D printing technology.
6. A microchannel reactor according to claim 1, characterized in that, The reaction core (200) is provided with a feed zone (208) and a discharge zone, wherein the feed zone (208) is provided with at least a first inlet (201) and a second inlet (202); the discharge zone is provided with an outlet (203); and the reaction channel (204) is connected to the feed zone (208) and the discharge zone.
7. A microchannel reactor according to claim 6, characterized in that, The first inlet (201) faces the discharge direction of the second inlet (202); the first inlet (201) is located on the downstream side of the second inlet (202); And / or, the feeding direction of the first inlet (201) and the feeding direction of the second inlet (202) are perpendicular to each other.
8. A microchannel reactor according to claim 1, characterized in that, It also includes a heat exchange shell (100), wherein the reaction core (200) is located in an inner cavity of the heat exchange shell (100); the heat exchange shell (100) is provided with two heat exchange cavities, and the two heat exchange cavities are respectively located on opposite sides of the reaction core (200).
9. A microchannel reactor according to claim 8, characterized in that: A plurality of first heat exchange channels (103) are provided in the reaction core (200), and the first heat exchange channels (103) pass through the reaction core (200) to connect the two heat exchange chambers; And / or, the first channel (207), the second channel (210) and the reflux channel (212) are arranged to form an intermediate island (206), a second heat exchange channel (104) is provided in the intermediate island (206), and the second heat exchange channel (104) passes through the reaction core (200) and connects the two heat exchange chambers.
10. A microchannel reactor according to claim 9, characterized in that: The side surface of the intermediate island (206) corresponding to the position where the first channel (207) and the second channel (210) are connected is a curved surface convex toward the upstream; and / or the flow direction of the first heat exchange channel (103) and the second heat exchange channel (104) is perpendicular to the flow direction of the reaction channel (204); And / or, the heat exchange shell (100) is manufactured using 3D printing technology.