Module assembly connecting device for silicon carbide micro-channel reactor

Abstract

The utility model relates to the technical field of micro-reactors, in particular to a connecting device for a silicon carbide micro-channel reactor module assembly. The connecting and fixing head comprises a connecting block, a connecting cylinder and connecting holes, the connecting cylinder is arranged on the front portion of the connecting block, four connecting holes are symmetrically formed in the connecting block, a fixing nut fixes the whole single connecting head on a silicon carbide plate through the connecting holes, and a single microfluidic tube is inserted into an inner cavity of the connecting cylinder. The single microfluidic tube comprises a connector, a threaded connection port and a middle hole, the threaded connection port is formed in the front part of the connector, the through middle hole is formed in the connector and the threaded connection port, and a sealing ring is arranged between the connector and the microfluidic channel. The connecting position of the device can bear large pressure.

Description

Technical Field

[0001] The utility model relates to the technical field of microreactors, and particularly relates to a connecting device for a silicon carbide microchannel reactor module assembly. Background Art

[0002] As an emerging chemical reaction platform, microreactor technology has received extensive attention due to its high efficiency, controllability, and safety. As an important part of microreactors, microchannel reactors are characterized by having small-scale channels, which can greatly improve mass transfer and heat transfer efficiency, thereby improving the control and safety of chemical reactions.

[0003] Silicon carbide (SiC), as an advanced ceramic material, is widely used in the manufacture of high-performance microchannel reactors due to its excellent physical and chemical properties (such as high hardness, high strength, good high-temperature resistance performance, and chemical stability). However, how to effectively connect these microchannel reactor modules while ensuring good sealing performance and strength has become an urgent problem to be solved.

[0004] Traditional microchannel reactor connection technologies mostly adopt welding or bonding methods. Although this method can provide a certain sealing effect, there are some defects in practical applications. For example, it is difficult to ensure the strength and sealing performance at the connection, especially in high-temperature and high-pressure working environments. In addition, for complex reaction processes, it is necessary to frequently disassemble and assemble reactor modules, and traditional connection methods often cannot meet this requirement.

[0005] In recent years, to solve the above problems, several new connection technologies have emerged. For example, a microchannel leak-proof quick-connection joint structure (CN208366150U) connects the joints in a non-welding manner, avoiding leakage problems caused by welding, simplifying the connection process, and improving production efficiency. In addition, a microchannel reactor (CN107537415B) adopts an integrated design, and solves the problems of poor sealing performance and easy leakage of existing microchannel reactors by setting a feed port valve, an input mixing chamber, a mixing reaction channel, an output mixing chamber, and a discharge port valve. This design improves the sealing performance and durability of the microchannel reactor, reducing maintenance costs.

[0006] However, for silicon carbide microchannel reactors, it is still necessary to further develop a new type of connecting device that can meet the requirements of quick disassembly and assembly of reactor modules while ensuring sealing performance and mechanical strength, and has a high pressure resistance capacity. Existing technologies generally use a single screw for overall fixation, with a pressure resistance of about 6 MPa. Due to the increasing requirements for tests, the pressure resistance capacity requirements are also getting higher and higher. Moreover, with the development of tests or products, sometimes it is necessary to use multiple devices in combination. Summary of the Invention

[0007] Aiming at the deficiencies of the prior art, the utility model provides a connecting device for a silicon carbide microchannel reactor module assembly. The utility model adopts a symmetrical fixing method and is connected by pressing a sealing ring, so that the connection part of the device of the utility model can bear a large pressure.

[0008] The technical solution of the utility model is: a connecting device for a silicon carbide microchannel reactor module assembly, including a microfluidic channel, a silicon carbide plate and a single connecting joint. The single connecting joint is arranged at both ends of the inlet and outlet of the microfluidic channel. The characteristics are: the single connecting joint includes a single microfluidic pipe, a connecting fixed head, a fixing nut and a sealing ring; the connecting fixed head includes a connecting block, a connecting cylinder and a connecting hole. The connecting cylinder is arranged at the front part of the connecting block, and 4 connecting holes are symmetrically arranged on the connecting block. The fixing nut fixes the whole single connecting joint on the silicon carbide plate through the connecting hole. The single microfluidic pipe is inserted into the internal cavity of the connecting cylinder. The single microfluidic pipe includes a connecting head, a threaded connection port and a middle hole. The threaded connection port is arranged at the front part of the connecting head. The connecting head and the threaded connection port have a through middle hole inside. A sealing ring is arranged between the connecting head and the microfluidic channel.

[0009] According to a connecting device for a silicon carbide microchannel reactor module assembly as described above, the characteristics are: the single microfluidic pipe is made of polyester material.

[0010] According to a connecting device for a silicon carbide microchannel reactor module assembly as described above, the characteristics are: the sealing ring is made of polyester material.

[0011] According to a connecting device for a silicon carbide microchannel reactor module assembly as described above, the characteristics are: the connecting fixed head is made of stainless steel material.

[0012] According to a connecting device for a silicon carbide microchannel reactor module assembly as described above, the characteristics are: after connection and fixation, the compression ratio of the sealing ring is in the range of 18%-25%.

[0013] According to a connecting device for a silicon carbide microchannel reactor module assembly as described above, the characteristics are: including two silicon carbide plates, and the microfluidic channels between the two silicon carbide plates are connected by a double connecting joint.

[0014] According to a connecting device for a silicon carbide microchannel reactor module assembly as described above, the characteristics are: the double connecting joint includes a connecting fixed head, a fixing nut, a sealing ring and a double microfluidic pipe.

[0015] According to a connection device for a silicon carbide microchannel reactor module component as described above, it is characterized in that: a through hole is provided in the middle of the double microfluid pipes, the two sides of the double microfluid pipes are connected to the microfluid channels through sealing rings, threads are provided on the double microfluid pipes, and threads corresponding to the double microfluid pipes are provided on the inner ring of the connecting fixed head. The two ends of the double microfluid pipes are respectively fixed on the silicon carbide plate through the connecting fixed head and the fixing nut.

[0016] According to a connection device for a silicon carbide microchannel reactor module component as described above, it is characterized in that: the double microfluid pipes are made of polyester material.

[0017] The beneficial effect of the present utility model is that it can deform evenly under high pressure, so the pressure resistance value of the device of the present utility model can reach 15 Mpa; it is beneficial to meet the product requirements of different scenarios. Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of a single connection joint.

[0019] Figure 2 It is a schematic structural diagram of a single microfluid pipe.

[0020] Figure 3 It is a schematic side view of a single microfluid pipe.

[0021] Figure 4 It is a schematic side view of the connecting fixed head.

[0022] Figure 5 It is a schematic structural diagram of the connecting fixed head.

[0023] Figure 6 It is a schematic structural diagram of a double connection joint.

[0024] Figure 7 It is a schematic structural diagram of a double microfluid pipe.

[0025] Figure 8 It is a schematic diagram of the connection between a single silicon carbide plate and the outside.

[0026] Figure 9 It is a schematic diagram of the connection between double silicon carbide plates.

[0027] Description of the reference numerals: single microfluid pipe 1, connection head 11, threaded connection port 12, middle hole 13, connecting fixed head 2, connection block 21, connecting cylinder 22, connection hole 23, fixing nut 3, sealing ring 4, double microfluid pipe 5, single connection joint 6, double connection joint 7, microfluid channel 8, silicon carbide plate 9. Detailed Implementation Modes

[0028] The technical solutions of the present utility model will be further described below with reference to the drawings.

[0029] AsFigure 8 As shown, a connecting device for a silicon carbide microchannel reactor module assembly of the present utility model includes a microfluidic channel 8, a silicon carbide plate 9, and a single connecting joint 6. The single connecting joint 6 is arranged at both ends of the inlet and outlet of the microfluidic channel 8, and one or more can be set, which is determined according to the actual situation of the system. For example Figure 9 As shown, it includes two silicon carbide plates 9, and the microfluidic channels 8 are connected by a double connecting joint 7.

[0030] For example Figures 1 to 5 As shown, the single connecting joint 6 of the present utility model includes a single microfluidic tube 1, a connecting fixed head 2, a fixing nut 3, and a sealing ring 4; the connecting fixed head 2 includes a connecting block 21, a connecting cylinder 22, and a connecting hole 23. A connecting cylinder 22 is arranged at the front of the connecting block 21, and 4 connecting holes 23 are symmetrically arranged on the connecting block 21. The fixing nut 3 fixes the whole single connecting joint 6 on the silicon carbide plate 9 or corresponding structural parts through the connecting holes 23. The single microfluidic tube 1 is inserted into the internal cavity of the connecting cylinder 22. The single microfluidic tube 1 includes a connecting head 11, a threaded connection port 12, and a middle hole 13. A threaded connection port 12 is arranged at the front of the connecting head 11, and the connecting head 11 and the threaded connection port 12 have a through middle hole 13 inside. A sealing ring 4 is arranged between the connecting head 11 and the microfluidic channel 8. In this way, during the connection process, the external connecting head and the internal connecting head can be butt-connected by tightening 4 fixing nuts 3.

[0031] The single microfluidic tube 1 and the sealing ring 4 of the present utility model are preferably made of polyester materials, and the connecting fixed head 2 can be made of stainless steel materials. Because the connecting fixed head 2 can provide a relatively reasonable supporting force and the single microfluidic tube 1 also has a certain pressure-bearing capacity, after the present utility model is connected and fixed, the compression rate of the sealing ring 4 is preferably controlled at 18%-25%. A higher compression rate can ensure the sealing performance of the connection. And the present utility model adopts a symmetrical thread setting, so that the force transmitted from the sealing ring 4 through the single microfluidic tube 1 is evenly distributed on the connecting fixed head 2, so that it can be evenly deformed under a higher pressure. Therefore, the pressure-resistant value of the device of the present utility model can reach 15 Mpa.

[0032] For example Figure 6 、 Figure 7 and Figure 9As shown, the utility model further includes the butt joint of two silicon carbide plates 9. The two silicon carbide plates 9 adopt a double connection joint 7, and the double connection joint 7 includes a connection fixing head 2, a fixing nut 3, a sealing ring 4, and a double micro flow pipe 5. A through hole is provided in the middle of the double micro flow pipe 5. Both sides of the double micro flow pipe 5 are connected to the micro flow channel 8 through the sealing ring 4. Threads are provided on the double micro flow pipe 5, and corresponding threads are provided on the inner ring of the connection fixing head 2. Both ends of the double micro flow pipe 5 are fixed on the silicon carbide plates 9 through the connection fixing head 2 and the fixing nut 3 respectively, so as to realize the butt joint of the two silicon carbide plates 9. The double micro flow pipe 5 of the utility model is preferably made of polyester material.

[0033] Using the double connection joint 7 to connect two or more silicon carbide plates 9 in series or in parallel is beneficial to meeting the product requirements of different scenarios, such as products or tests that require adding gas or liquid in the middle, or outputting gas or liquid in the middle, thereby expanding the application range of the product and enabling the device of the utility model to meet more application scenarios.

Claims

1. A silicon carbide microchannel reactor module assembly connection device, comprising a microfluidic channel, a silicon carbide plate and a single connection joint, wherein the single connection joint is arranged at both ends of the inlet and outlet of the microfluidic channel, and is characterized in that: The single connection joint includes a single micro-circulation tube, a connection fixing head, a fixing nut, and a sealing ring; the connection fixing head includes a connection block, a connection cylinder, and a connection hole. A connection cylinder is arranged at the front of the connection block, and four connection holes are symmetrically arranged on the connection block. The fixing nut fixes the single connection joint as a whole on the silicon carbide plate through the connection hole. The single micro-circulation tube is inserted into the internal cavity of the connection cylinder. The single micro-circulation tube includes a connection head, a threaded connection port, and a middle hole. A threaded connection port is arranged at the front of the connection head. The connection head and the threaded connection port are internally provided with a through middle hole. A sealing ring is arranged between the connection head and the micro-flow channel.

2. A silicon carbide microchannel reactor module assembly connection device according to claim 1, characterized in that: The single micro-flow tube is made of polyester material.

3. A silicon carbide microchannel reactor module assembly connection device according to claim 1, characterized in that: The sealing ring is made of polyester material.

4. The silicon carbide microchannel reactor module assembly connection device according to claim 1, characterized in that: The connecting fixing head is made of stainless steel.

5. The silicon carbide microchannel reactor module assembly connection device according to claim 1, characterized in that: After connection and fixation, the compression rate of the sealing ring is in the range of 18%-25%.

6. The silicon carbide microchannel reactor module assembly connection device according to claim 1, characterized in that: The invention comprises two silicon carbide plates, and the micro-flow channels of the two silicon carbide plates are connected by a double connection joint.

7. A silicon carbide microchannel reactor module assembly connection device according to claim 6, characterized in that: The double connection joint comprises a connection fixing head, a fixing nut, a sealing ring and a double micro-circulation tube.

8. A silicon carbide microchannel reactor module assembly connection device according to claim 7, characterized in that: A through hole is set in the middle of the double micro-circulation tube, and both sides of the double micro-circulation tube are connected to the micro-flow channel through sealing rings. Threads are set on the double micro-circulation tube, and threads corresponding to the double micro-circulation tube are set on the inner circle of the connecting fixing head. Both ends of the double micro-circulation tube are fixed to the silicon carbide plate by connecting fixing heads and fixing nuts respectively.

9. A silicon carbide microchannel reactor module assembly connection device according to claim 8, characterized in that: The double micro-flow tube is made of polyester material.

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