A detachable stacked fish scale distributed hole hybrid core micro-reactor

Abstract

The application discloses a detachable layered fish scale type distribution hole mixed core micro reactor, which comprises a rectangular flat tube shaped outer sleeve and a plurality of layered rectangular fish scale hole inserts inserted into the inner cavity of the outer sleeve. The two ends of the outer sleeve are blocked by end caps. A plurality of protrusions or / and recessed openings are regularly arranged on the rectangular fish scale hole inserts according to the fish scale distribution. The opening area of the rectangular fish scale hole inserts accounts for 20-85% of the total area of the rectangular fish scale hole inserts. The specific surface area of the rectangular flat channel in the inner cavity of the outer sleeve is larger than that of the tubular channel. The heat exchange performance of the process in the micro reactor is obviously improved. The detachable layered fish scale type distribution hole mixed core is inserted into the rectangular flat tube micro channel in an interlaced manner. The oblique insertion of the opening effectively promotes the mixing and heat exchange effect of the internal fluid. The mixed core is convenient to assemble, disassemble and replace, and the convenience of equipment cleaning and maintenance is enhanced.

Description

Technical Field

[0001] This invention relates to the field of microreactor technology, and more particularly to a hybrid core microreactor with a detachable, stacked fish-scale distributed pore structure. Background Technology

[0002] Microreactors can complete chemical reactions within lengths ranging from tens to hundreds of millimeters, with microchannels being the most typical structure. The mixing core within the microchannel is the core component of the microreactor, significantly improving its mixing performance and thus enhancing reaction efficiency. In recent years, considering the necessity and convenience of maintenance in practical products, microreactors with detachable mixing cores have become mainstream and are widely used in the biopharmaceutical and fine chemical industries. Most existing detachable mixing cores are designed for tubular microchannel reactors, such as Chinese patents CN215540778U, CN215917350U, and CN215842929U; there are almost no reports in the literature on rectangular flat tubular microchannel reactors. Currently, the structure of single-layer microreactors is relatively complex, mainly relying on changes in the microchannel angle or diameter to achieve the mixing reaction; therefore, cleaning and disassembling traditional mixing core components is difficult.

[0003] In summary, there is an urgent need in the market to develop a mixing core that achieves mixing through detachable stacked inserts, thereby solving the problems of insufficient mixing heat exchange, microchannel blockage that is difficult to clean, or difficulty in replacing the mixing core. Summary of the Invention

[0004] This invention aims to at least partially solve one of the technical problems in related technologies. Therefore, one objective of this invention is to provide a detachable, stacked, fish-scale-patterned mixing core microreactor, which solves problems such as complex mixing core structure, inconvenient disassembly, and unsatisfactory mixing effect.

[0005] According to the present invention, a detachable, stacked, fish-scale-patterned hybrid core microreactor includes a rectangular flat tube-shaped outer tube and multiple stacked rectangular fish-scale-pattern inserts inserted into the inner cavity of the outer tube. The two ends of the outer tube are sealed with end caps, and the end caps are fixed to the outer tube with screws at the contact positions between them. The rectangular fish-scale-pattern inserts are regularly provided with a number of raised and / or recessed openings arranged in a fish-scale or similar pattern. The area of ​​the openings on the rectangular fish-scale-pattern inserts accounts for 20-85% of the total area of ​​the rectangular fish-scale-pattern inserts.

[0006] In other embodiments of the present invention, the opening shape is one of the following: alligator mouth opening, fish scale opening, louver opening, triangular opening, and frustum-shaped embossed opening;

[0007] The alligator mouth opening is made up of alternating protrusions and recesses.

[0008] In some embodiments of the present invention, the intermediate area enclosed by the two adjacent openings is an opening abutment area, and the protruding opening on the upper surface of the lower rectangular fish scale hole insert abuts against the lower surface of the opening abutment area on the upper rectangular fish scale hole insert, or the recessed opening on the lower surface of the upper rectangular fish scale hole insert abuts against the upper surface of the opening abutment area on the lower rectangular fish scale hole insert.

[0009] In some embodiments of the present invention, the angle between the opening orientation and the plane of the rectangular fish-scale hole insert is 0-90°.

[0010] In other embodiments of the present invention, the ratio of the total cross-sectional area of ​​all openings on the same rectangular fish-scale hole insert to the surface area of ​​the rectangular fish-scale hole insert is 1:2-20.

[0011] In other embodiments of the present invention, each of the outer tubes contains at least three stacked rectangular fish-scale hole inserts. The total thickness of the stacked rectangular fish-scale hole inserts is 1-10% smaller than the inner height of the outer tube, and the difference is less than the thickness of a single rectangular fish-scale hole insert. The ratio of the inner height to the width of the outer tube is 1:2-20.

[0012] In other embodiments of the present invention, the single-layer thickness of the rectangular fish-scale hole insert is between 0.1-5 mm, the width is between 5-50 mm, and the length is between 50-1500 mm.

[0013] In other embodiments of the present invention, the material of the fish-scale hole insert is one of galvanized steel plate, hot-rolled or cold-rolled plate, copper plate, nickel plate, stainless steel plate, aluminum alloy plate, Hastelloy, polymer material, and ceramic.

[0014] In other embodiments of the present invention, the material, hole arrangement, and size of the stacked fish-scale hole inserts inserted into each of the outer tubes may be the same or different.

[0015] In other embodiments of the present invention, a plurality of the outer sleeves are connected in parallel to form a unit, and the units formed by the plurality of outer sleeves are connected in series to form an integrated microreactor.

[0016] In other embodiments of the present invention, the surface roughness Ra of the opening of the fish-scale hole insert and the opening of the opening is not greater than 0.8 μm.

[0017] An installation method for a detachable, stacked, fish-scale-patterned hybrid core microreactor, comprising the following specific steps:

[0018] S1: Multiple fish-scale hole inserts are stacked, with the protruding opening on the upper surface of the lower rectangular fish-scale hole insert abutting the lower surface of the opening abutting area of ​​the upper rectangular fish-scale hole insert, or / and the concave opening on the lower surface of the upper rectangular fish-scale hole insert abutting the upper surface of the opening abutting area of ​​the lower rectangular fish-scale hole insert. After multiple stacks, the fish-scale hole inserts are inserted into the inner cavity of the outer tube from one side of the outer tube.

[0019] S2: Use end caps to seal both ends of the outer tube, place sealing gaskets between the end caps and the outer tube, and fix the end caps to the outer tube with screws;

[0020] S3: Multiple outer tubes are connected in parallel to form a unit, and the units formed by multiple outer tubes are connected in series to form an integrated microreactor; alternatively, multiple outer tubes are connected in series to form a unit, and the units formed by multiple outer tubes connected in series are then connected in parallel to form an integrated microreactor.

[0021] In this invention, 1. the rectangular flat channel inside the outer tube has a larger specific surface area than the tubular channel, which significantly improves the heat exchange performance of the process in the microreactor.

[0022] 2. The detachable, stacked, fish-scale-patterned mixing core is inserted into a rectangular flat tube microchannel in an alternating manner. The openings and interlayer flow effectively promote the mixing of the internal fluids, thereby greatly improving the reaction mixing effect.

[0023] 3. The hybrid core facilitates multi-specification design and mass production, and its assembly and disassembly are convenient and flexible, greatly reducing the difficulty of equipment cleaning and maintenance. Attached Figure Description

[0024] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0025] Figure 1 This is a schematic diagram of the rectangular insert with fish-scale hole pattern proposed in this invention.

[0026] Figure 2 for Figure 1 Enlarged diagram of point A in the middle.

[0027] Figure 3 and 4 This is a top view of the upper and lower rectangular inserts and a schematic diagram of the fish-scale hole distribution.

[0028] Figure 5 This is a schematic diagram of the cross-section of two rectangular inserts with fish-scale perforation.

[0029] Figure 6This is a schematic diagram of the rectangular insert structure with a frustum-shaped embossing hole proposed in this invention.

[0030] Figure 7 for Figure 6 Enlarged diagram of point A in the middle.

[0031] Figure 8 This is a top view of the rectangular insert with a frustum-shaped embossing hole proposed in this invention.

[0032] Figure 9 This is a schematic diagram of a rectangular insert structure with a recessed circular bulge hole on one side (a semi-circular bulge with a small hole directly below it and a circular hole in the middle area) proposed in this invention.

[0033] Figure 10 for Figure 9 A schematic diagram of the structure of a rectangular fish-scale hole insert being inserted into the outer tube.

[0034] Figure 11 This is a schematic diagram of the rectangular insert structure with alternating circular embossed holes and fish-scale holes proposed in this invention.

[0035] Figure 12 This is a top view of the rectangular insert with alternating circular embossed holes and fish-scale holes proposed in this invention.

[0036] Figure 13 for Figure 12 A schematic diagram of the structure of a rectangular fish-scale hole insert being inserted into the outer tube.

[0037] Figure 14 This is a schematic diagram of the rectangular insert structure with louvered openings proposed in this invention.

[0038] Figure 15 This is a schematic diagram of the rectangular insert structure with alternating raised and recessed fish-scale holes proposed in this invention.

[0039] Figure 16 This is a schematic diagram of the rectangular insert structure with two protruding alligator mouth holes proposed in this invention.

[0040] Figure 17 This is a schematic cross-sectional view of the rectangular insert for the alligator mouth hole proposed in this invention.

[0041] In the diagram: 1. Rectangular fish-scale hole insert; 2. Fish-scale hole; 21. Opening of the fish-scale hole; 22. Abutment area of ​​the opening on the fish-scale hole; 3. Frustum-shaped embossed hole; 31. Opening of the frustum-shaped embossed hole; 32. Abutment area of ​​the opening on the frustum-shaped embossed hole; 4. Louvered hole; 41. Opening of the louvered hole; 42. Abutment area of ​​the opening on the louvered hole; 5, 6. Alligator mouth hole. 100. Outer sleeve; 501. Protruding alligator mouth hole on the upper surface; 502. Protruding alligator mouth hole on the lower surface. Detailed Implementation

[0042] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0043] This invention proposes a detachable, stacked, fish-scale-patterned hybrid core microreactor, comprising a rectangular flat tube-shaped outer tube and multiple stacked rectangular fish-scale-patterned inserts 1 inserted into the inner cavity of the outer tube. Both ends of the outer tube are sealed with end caps, and sealing gaskets are placed between the end caps and the outer tube at their contact points and fixed to the outer tube with screws. Each rectangular fish-scale-patterned insert 1 has several regularly spaced protruding and / or recessed openings arranged according to a fish-scale pattern. The central area enclosed by three adjacent openings is the opening abutment area. The protruding openings on the upper surface of the lower rectangular fish-scale-patterned insert 1 abut against the lower surface of the opening abutment area on the upper rectangular fish-scale-patterned insert 1, or the recessed openings on the lower surface of the upper rectangular fish-scale-patterned insert 1 abut against the upper surface of the opening abutment area on the lower rectangular fish-scale-patterned insert 1. The area of ​​the openings on the rectangular fish-scale-patterned insert 1 accounts for 20-85% of the total area of ​​the rectangular fish-scale-patterned insert 1.

[0044] The openings on the insert with fish-scale holes or other openings are made using micromachining methods, including electrical discharge machining, laser processing, wire cutting, photochemical etching, mechanical drilling, micro-drilling, and CNC punching.

[0045] The ratio of the total area of ​​the openings on the fish-scale perforated insert to the area of ​​the entire rectangular strip can be easily adjusted. Correspondingly, the suitable flux and flow rate of the integrated microreactor can also be adjusted and replaced by changing the specifications of the mixing core.

[0046] There should be at least three, preferably three to six, rectangular fish-scale-shaped inserts with multiple layers.

[0047] The angle between the opening orientation and the plane of the rectangular fish-scale hole insert 1 is 0-90°. Figure 14 The angle between the opening direction and the plane of the rectangular fish-scale hole insert 1 is 0°, meaning they are parallel. Figure 6 , Figure 7 , Figure 16 and Figure 17 It is 90°, that is, perpendicular. And... Figure 1 , Figure 2 and Figure 15 It has a certain angle of 30-60°, generally around 45°.

[0048] The total thickness of the stacked rectangular fish-scale hole inserts 1 is 0.1-0.5 mm (1-10%) less than the inner height of the outer tube, and the difference in thickness is less than the thickness of a single rectangular fish-scale hole insert 1. The ratio of the inner height to the width of the outer tube is 1:2-20. The thickness of a single layer of the rectangular fish-scale hole insert 1 is between 0.1-5 mm, the width is between 5-50 mm, and the length is between 50-1500 mm.

[0049] The material of the fish-scale hole insert is one of the following: galvanized steel plate, hot-rolled or cold-rolled plate, copper plate, nickel plate, stainless steel plate, aluminum alloy plate, Hastelloy, polymer material, or ceramic.

[0050] The opening shape is one of the following: crocodile mouth hole 5, 6, fish scale hole 2, louver hole 4, triangular hole, and frustum-shaped bulging hole 3;

[0051] The crocodile mouth opening is made of alternating convex and concave openings. Figure 10 ).

[0052] exist Figure 9 and 10 In the middle, a single-sided staggered semi-circular bulge is used, with a small hole opened directly below the bulge. The single-sided structural distribution is similar to... Figure 6 Similarly, the insert has a round hole in the middle of its surface, or a semi-circular bulge can be made on both sides.

[0053] exist Figure 11-13 In the middle, circular embossed holes and fish scale holes are distributed alternately, and the circular embossed holes and fish scale holes are set on two sides respectively.

[0054] exist Figure 16 The design features double-sided convex alligator mouth-shaped protrusions, but can also be set on one side only.

[0055] Multiple outer tubes are connected in parallel to form a unit, and the units formed by multiple outer tubes are connected in series to form an integrated microreactor. The liquid flow rate and volume within each outer tube 1 must be limited to a certain range to ensure high flow rate and velocity. Multiple outer tubes are connected in parallel to form a unit, and the units formed by multiple outer tubes are connected in series to form an integrated microreactor to improve the reaction flux.

[0056] The surface roughness Ra of the fish-scale perforated insert is no greater than 0.8 μm. This prevents additional friction between the rectangular insert and the outer tube during assembly and disassembly, thus avoiding scratches and preventing solid foreign objects from adhering to the reactor wall or dead corners of the insert, which would increase cleaning difficulty. It also reduces unnecessary pressure drop.

[0057] The inner length of the outer tube is 2-5mm longer than the length of the fish-scale hole insert. This facilitates the insertion of the fish-scale hole insert into the inner cavity of the outer tube, does not affect the installation of the end cap, and effectively prevents the fish-scale hole insert from shaking.

[0058] An installation method for a detachable, stacked, fish-scale-patterned hybrid core microreactor, comprising the following specific steps:

[0059] S1: Multiple fish-scale hole inserts are stacked, with the protruding opening on the upper surface of the lower rectangular fish-scale hole insert 1 abutting against the lower surface of the opening abutting area of ​​the upper rectangular fish-scale hole insert 1, or / and the recessed opening on the lower surface of the upper rectangular fish-scale hole insert 1 abutting against the upper surface of the opening abutting area of ​​the lower rectangular fish-scale hole insert 1. After multiple stacks, the fish-scale hole inserts are inserted into the inner cavity of the outer tube from one side of the outer tube.

[0060] S2: Use end caps to seal both ends of the outer tube, place sealing gaskets between the end caps and the outer tube, and fix the end caps to the outer tube with screws;

[0061] S3: Multiple outer tubes are connected in parallel to form a detachable, stacked fish-scale hole hybrid core.

[0062] Disassembly.

[0063] In actual use, if scale or blockage occurs inside the equipment and cleaning and maintenance are required, the screws on the end caps at both ends of the inlet and outlet can be loosened first. After removing the end caps, a thin stick can be used to push the rectangular fish-scale hole insert 1 out a small section at one end of the inlet and outlet. Then, the insert can be pulled out directly from the other end to complete the disassembly process.

[0064] Cleaning and maintenance of a detachable, stacked fish-scale hole hybrid core.

[0065] To clean and maintain the rectangular fish-scale hole insert 1, it is usually placed in a container filled with cleaning agent and soaked for a certain period of time. An ultrasonic cleaner can also be used as an aid. Then, it is brushed with a fine brush to complete the cleaning process.

[0066] Reassembly of a detachable, stacked fish-scale hole hybrid core (including replacement of hybrid core components).

[0067] After cleaning and maintenance of the removable, stacked fish-scale mesh hybrid core, if some cores are found to be severely clogged (requiring additional maintenance beyond ultrasonic cleaning) and need to be replaced, or if a different specification of stacked fish-scale mesh hybrid core is required based on the actual situation, reassembly can be performed. Select a suitable multi-layer hybrid core according to the actual situation, considering various technical specifications including material, thickness, width, length, mesh shape and arrangement, and surface roughness.

[0068] The microchannel reactor, composed of detachable, stacked fish-scale-hole mixing cores, can be conveniently used in the synthesis processes of easily clogged polymer materials. Compared to conventional fully disassembled Bayer microreactor valve-assisted mixers, the maintenance time of the microreactor involved in this invention is reduced by at least 40%, and even up to 85%, from the discovery of potential clogging or fouling (e.g., a rapid increase in system pressure drop) to disassembly, cleaning, maintenance, possible replacement of mixing cores or units, and reassembly. This significantly improves the maintenance efficiency in process optimization or production, and requires less technical expertise from operators.

[0069] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A detachable, stacked, fish-scale-distributed pore hybrid core microreactor, characterized in that: The device includes a rectangular flat tube-shaped outer tube and a multi-layered rectangular fish-scale hole insert (1) inserted into the inner cavity of the outer tube. Both ends of the outer tube are sealed with end caps. A sealing gasket is placed at the contact position between the end cap and the outer tube. The end cap is fixed to the outer tube with screws. The rectangular fish-scale hole insert (1) has a number of regular openings with protrusions and / or recesses arranged according to the distribution of fish scales. The area of ​​the openings on the rectangular fish-scale hole insert (1) accounts for 20-85% of the total area of ​​the rectangular fish-scale hole insert (1). The number of stacked rectangular fish-scale hole inserts (1) inserted into each of the outer tubes is not less than 3. The total thickness of the stacked rectangular fish-scale hole inserts (1) is 1-10% smaller than the inner cavity height of the outer tube and the smaller height is less than the thickness of a single rectangular fish-scale hole insert (1). The ratio of the inner cavity height to the width of the outer tube is 1:2-20. The middle area enclosed by two adjacent openings is the opening abutment area. The protruding opening on the upper surface of the lower rectangular fish scale hole insert (1) abuts against the lower surface of the opening abutment area of ​​the upper rectangular fish scale hole insert (1), or the recessed opening on the lower surface of the upper rectangular fish scale hole insert (1) abuts against the upper surface of the opening abutment area of ​​the lower rectangular fish scale hole insert (1). The opening shape is one or more of the following: alligator mouth opening (5, 6), fish scale opening (2), and louver opening (4).

2. The detachable, stacked, fish-scale-distributed pore hybrid core microreactor according to claim 1, characterized in that: The alligator mouth opening is made up of alternating protrusions and recesses.

3. The detachable, stacked, fish-scale-distributed pore hybrid core microreactor according to claim 1, characterized in that: The angle between the opening orientation and the plane of the rectangular fish-scale hole insert (1) is [0, 90°].

4. The detachable, stacked, fish-scale-distributed pore hybrid core microreactor according to claim 1, characterized in that: The ratio of the total cross-sectional area of ​​all openings on the rectangular fish-scale hole insert (1) to the surface area of ​​the rectangular fish-scale hole insert (1) is 1:2-20.

5. A detachable, stacked, fish-scale-distributed pore hybrid core microreactor according to claim 1, characterized in that: The rectangular fish-scale hole insert (1) has a single-layer thickness of 0.1-5mm, a width of 5-50mm, and a length of 50-1500mm.

6. The detachable, stacked, fish-scale-distributed pore hybrid core microreactor according to claim 1, characterized in that: The fish-scale hole insert is made of one or more of the following materials: galvanized steel plate, hot-rolled or cold-rolled plate, copper plate, nickel plate, stainless steel plate, aluminum alloy plate, Hastelloy, polymer material, and ceramic.

7. A detachable, stacked, fish-scale-distributed pore hybrid core microreactor according to claim 1, characterized in that: Multiple outer tubes are connected in parallel to form a unit, and the units formed by multiple outer tubes are connected in series to form an integrated microreactor; or multiple outer tubes are connected in series to form a unit, and the units formed by multiple outer tubes connected in series are then connected in parallel to form an integrated microreactor.

8. A method for installing a detachable, stacked, fish-scale-distributed porous hybrid core microreactor as described in claim 1, characterized in that: The specific steps are as follows: S1: Multiple fish-scale hole inserts are stacked, and the protruding opening on the upper surface of the lower rectangular fish-scale hole insert (1) abuts against the lower surface of the opening abutment area of ​​the upper rectangular fish-scale hole insert (1), or / and the recessed opening on the lower surface of the upper rectangular fish-scale hole insert (1) abuts against the upper surface of the opening abutment area of ​​the lower rectangular fish-scale hole insert (1). After multiple stacks, the fish-scale hole inserts are inserted into the inner cavity of the outer tube from one side of the outer tube. S2: Use end caps to seal both ends of the outer tube, place sealing gaskets between the end caps and the outer tube, and fix the end caps to the outer tube with screws; S3: Multiple outer tubes are connected in parallel to form a unit, and the units formed by multiple outer tubes are connected in series to form an integrated microreactor; alternatively, multiple outer tubes are connected in series to form a unit, and the units formed by multiple outer tubes connected in series are then connected in parallel to form an integrated microreactor.

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