A detachable stacked staggered hole hybrid core micro-reactor

Abstract

The application discloses a detachable laminated staggered-hole mixed core micro-reactor, which comprises a rectangular flat tube-shaped outer sleeve and a plurality of laminated rectangular staggered-hole inserts inserted into the inner cavity of the outer sleeve. The rectangular staggered-hole inserts are provided with a plurality of transverse rows of protruding hole channels or concave hole channels, and the protruding hole channels on adjacent transverse rows are staggered. The laminated staggered-hole mixed core and the rectangular flat channel of the outer sleeve are matched with each other, the mixing and heat exchange performance of the process in the micro-reactor is obviously improved, and the mixed core is more convenient to assemble, disassemble, clean and maintain, especially the staggered hole channels and the interlayer turbulence effectively promote the mixing of the internal fluid. The laminated staggered-hole mixed core can meet the individualization and customization while being mass-produced. Different specifications of the staggered-hole cores can be combined for use, and the single standard core is convenient for testing and obtaining experience data, and is convenient for operators to replace different specifications according to needs in daily use.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of micro-reactors, in particular to a detachable stacked staggered hole mixing core micro-reactor. BACKGROUND

[0002] Micro-reactors can complete chemical reactions within a length scale of tens to hundreds of millimeters, and the most typical structure is a micro-channel. Considering the necessity and convenience of actual product maintenance, micro-reactors containing detachable mixing cores have become mainstream and are widely used in the pharmaceutical chemical industry, fine chemical industry and polymer material industry. The mixing core in the micro-channel is the core component of the micro-reactor, which can significantly improve the mixing performance of the micro-reactor and thus improve its reaction effect. Existing detachable mixing cores are designed for sleeve type micro-channel reactors, and there is no report on micro-reactors with rectangular flat tube-shaped micro-channels.

[0003] Conventional micro-reactors are single-layer and have complex structures, and the liquid flow direction is changed in multiple directions to achieve the purpose of mixing reaction. For example, CN114160067A discloses a combined baffle type micro-reactor, wherein the micro-reaction chamber is composed of an upper micro-reactor substrate and a lower micro-reactor substrate, the micro-reaction chamber is elliptical, the direction of fluid flow is the long axis direction of the ellipse, and a plurality of sets of baffles for fluid folding are arranged along the long axis direction in the micro-reaction chamber; the micro-channel has a wave knot structure that can form fluid turbulence on the outer diameter; the baffles in the elliptical micro-reaction chamber can make the fluid repeatedly fold and collide, effectively improving the mixing effect of the fluid, and the wave knot structure on the micro-channel can cause continuous changes in the diameter of the micro-channel to form turbulence, further strengthening the mixing effect of the fluid. Even if a micro-mixer or micro-reactor with a mixing core or internal component design concept such as CN105617957A is used, the design is complex, the cost is increased, and the internal components may have dead corners, making it difficult to clean and disassemble. Therefore, there is an urgent need to develop a detachable stacked staggered hole mixing core micro-reactor, which can cleverly solve the problems of difficult disassembly, replacement and cleaning and maintenance by relying on the simple structure design of a single-layer rectangular core and the complex channel effect generated by multi-layer stacking. SUMMARY

[0004] The present application aims to at least solve one of the technical problems in the related art. To this end, one object of the present application is to provide a detachable stacked staggered hole mixing core micro-reactor, which solves the problems of complex mixing core structure, inconvenient disassembly, and unsatisfactory mixing effect.

[0005] According to the present application, a detachable stacked staggered hole mixed core micro-reactor is provided, which comprises a rectangular flat tube shaped outer sleeve and a plurality of stacked rectangular staggered hole inserts inserted into the inner cavity of the outer sleeve. The rectangular staggered hole insert 1 is provided with a plurality of transverse rows of protrusions and recessed channels. The front end of each protrusion channel is provided with a beveled groove. The protrusion channels on adjacent transverse rows are staggered. The straight line where the tail end of the protrusion channel on the upper transverse row is located is the same as the straight line where the head end of the protrusion channel on the lower transverse row is located. The protrusion part of the protrusion channel on the lower insert is inserted into the opening on the lower surface of the recessed channel on the upper insert between two adjacent stacked staggered hole inserts 1. The upper and lower rectangular staggered hole inserts are stacked with a gap in the middle.

[0006] In some embodiments of the present application, the protrusion or recessed channel is one or more of a tunnel mouth shape, a circular shape, an elliptical shape, or a horn shape.

[0007] In some embodiments of the present application, the angle between the protrusion or recessed channel and the plane of the rectangular staggered hole insert is 30-60°.

[0008] In some embodiments of the present application, the ratio of the average value of the nominal diameter of the cross section of the protrusion or recessed channel to the length of the protrusion or recessed channel is 1:2-20, and the ratio of the maximum nominal diameter of the cross section of the protrusion or recessed channel to the minimum nominal diameter of the cross section is 1-10:1.

[0009] In some embodiments of the present application, the number of stacked rectangular staggered hole inserts inserted into each outer sleeve is not less than 3. The sum of the total thickness of the stacked rectangular staggered hole inserts is 1-15% less than the height of the inner cavity of the outer sleeve, and the smaller height is less than the thickness of a single rectangular staggered hole insert. The ratio of the height to the width of the inner cavity of the outer sleeve is 1:2-20.

[0010] In some embodiments of the present application, the two ends of the outer sleeve 100 are sealed by end caps. The contact position between the end cap and the outer sleeve is provided with a sealing gasket, and the end cap is fixed to the outer sleeve by screws. The same outer sleeve can be selected to have the same or different rectangular staggered hole inserts 1 for multi-layer stacking.

[0011] In some embodiments of the present application, the thickness of a single layer of the rectangular staggered hole insert is between 0.1-5mm, the width is between 5-50mm, and the length is between 50-1500mm.

[0012] In some embodiments of the present application, the material of the staggered hole insert is one or more of galvanized steel plate, cold and hot rolled plate, copper plate, nickel plate, stainless steel plate, aluminum alloy plate, hastelloy, polymer material, ceramic, graphene, and silicon carbide.

[0013] In some other embodiments of the present application, a plurality of the outer sleeves are connected in parallel to form a unit, and a plurality of the units formed by the outer sleeves are connected in series to form an integrated micro-reactor; or a plurality of the outer sleeves 100 are connected in series to form a unit, and a plurality of the units formed by the outer sleeves 100 are connected in parallel to form an integrated micro-reactor.

[0014] In some other embodiments of the present application, the roughness Ra of the opening surface of the perforated patch and the opening of the perforation is not greater than 0.8 μm.

[0015] A mounting method of a detachable stacked perforated mixed core micro-reactor, and the specific steps are as follows:

[0016] S1: A plurality of rectangular perforated patches are stacked, the protruding part of the protruding channel on the upper layer of the rectangular perforated patch is inserted into the opening of the protruding channel on the lower layer of the rectangular perforated patch at the lower surface of the rectangular perforated patch, and a plurality of stacked rectangular perforated patches are inserted into the inner cavity of the outer sleeve from one side of the outer sleeve;

[0017] S2: The outer sleeve is sealed at both ends by a head, a sealing gasket is provided between the head and the outer sleeve, and the head is fixed on the outer sleeve by a screw;

[0018] S3: A plurality of the outer sleeves are connected in parallel to form a unit, and a plurality of the units formed by the outer sleeves are connected in series to form an integrated micro-reactor; or a plurality of the outer sleeves 100 are connected in series to form a unit, and a plurality of the units formed by the outer sleeves 100 are connected in parallel to form an integrated micro-reactor.

[0019] The advantages of the present application include the following five aspects:

[0020] 1. The rectangular flat channel in the inner cavity of the outer sleeve has a larger specific surface area than the tubular channel, and the heat exchange performance of the process in the micro-reactor is obviously improved.

[0021] 2. The single-layer rectangular perforated mixed core itself is simple in design, and the complex perforated micro-channel between layers can be realized by inserting multiple layers into the rectangular flat tube micro-channel, which promotes the mixing of internal fluids and improves the reaction mixing effect.

[0022] 3. The detachable rectangular perforated mixed core structure does not have inherent dead angles, and is convenient for assembly, disassembly, and equipment cleaning and maintenance.

[0023] 4. The rectangular perforated mixed core involves a variety of variable technical specifications, including symmetric and asymmetric structures, and can be easily adjusted, such as the combination and size of the protruding or recessed channel, the shape and size of the opening, and the different combinations of multiple layers of perforated patches, etc., which can easily adjust different requirements in actual process and production process.

[0024] 5. The stacked staggered hole hybrid core allows for both mass production and personalization / customization. Different specifications of staggered hole cores can be combined, and a single standard core facilitates testing to obtain empirical data, allowing operators to easily change the specifications and ratios as needed in daily use. Attached Figure Description

[0025] 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:

[0026] Figure 1 The present invention provides a schematic diagram of the microreactor structure (tunnel-shaped).

[0027] Figure 2 This is a schematic diagram of the rectangular staggered hole insert for the tunnel opening type proposed in this invention.

[0028] Figure 3 This is a schematic diagram of the rectangular staggered hole insert with a cross-section on one side of the tunnel entrance proposed in this invention.

[0029] Figure 4 This is a schematic diagram of the structure of the circular-mouth rectangular staggered hole insert proposed in this invention.

[0030] Figure 5 The side view of the rectangular staggered hole insert with a circular opening is provided in this invention.

[0031] Figure 6 This is a schematic diagram of the radial cross section of the rectangular staggered hole insert for the tunnel opening type proposed in this invention.

[0032] Figure 7 This is a schematic diagram of the flared rectangular staggered hole insert proposed in this invention.

[0033] In the diagram: 100, outer sleeve; 1, rectangular staggered hole insert; 2, tunnel entrance type protruding channel; 21, opening at the protruding position of the tunnel entrance type protruding channel; 22, oblique joint groove at the front end of the tunnel entrance type protruding channel.

[0034] 3. A flared protruding channel; 4. A circular protruding channel; 41. An opening at the protruding position of a circular protruding channel; 42. A slanted groove at the front end of a circular protruding channel; 43. An opening at the rear end of a circular protruding channel. Detailed Implementation

[0035] 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.

[0036] The detachable laminated staggered hole mixed core micro-reactor comprises a rectangular flat tube shaped outer sleeve 100 and a plurality of laminated rectangular staggered hole inserts 1 inserted into the inner cavity of the outer sleeve 100, both ends of the outer sleeve are blocked by end caps, sealing gaskets are arranged at the contact positions between the end caps and the outer sleeve, and the end caps are fixed on the outer sleeve by screws, a plurality of transverse row protruding hole channels are arranged on the rectangular staggered hole insert 1, a bevel joint groove is arranged at the front end of each protruding hole channel, the protruding hole channels on adjacent transverse rows are staggered, a straight line at the tail end of the protruding hole channels of the upper transverse row is the same as a straight line at the head end of the protruding hole channels of the lower transverse row, the protruding part of the protruding hole channels on the lower rectangular staggered hole insert 1 is inserted into the opening on the lower surface of the protruding hole channels on the upper rectangular staggered hole insert, and a gap is left between the upper rectangular staggered hole insert 1 and the lower rectangular staggered hole insert 1 after lamination.

[0037] The protruding hole channels on adjacent transverse rows are staggered, but the protruding hole channels on adjacent two transverse rows can also be arranged in a row on the upper surface and in a row on the lower surface.

[0038] The protruding position of the protruding hole channels on the rectangular staggered hole insert 1 accounts for 35-60% of the area of the entire rectangular staggered hole insert 1.

[0039] The openings on the rectangular staggered hole insert 1 are formed by a micro-processing method, and the micro-processing method includes electric spark, laser processing, wire cutting, photochemical etching, mechanical drilling processing, micro-drilling, numerical control punch punching and the like.

[0040] When the flow rate needs to be increased, the total opening area of the openings on the staggered hole insert accounts for a relatively larger area of the entire rectangular long strip, and the difference between the opening at the protruding position and the opening at the tail end should not be too large, and the larger the difference, the higher the pressure drop that can be caused.

[0041] The opening at the tail end position of the upper circular protruding hole channel corresponds to the opening at the tail end position of the lower circular concave hole channel.

[0042] The number of the plurality of laminated rectangular staggered hole inserts 3 is not less than three.

[0043] The included angle between the protruding hole channel and the plane of the rectangular staggered hole insert 1 is 30-60°, that is, the hole channel is inclined.

[0044] The ratio of the average value of the nominal diameter of the cross section of the protruding hole channel or the concave hole channel to the length of the protruding hole channel or the concave hole channel is 1:2-20, and the ratio of the maximum cross-sectional nominal diameter to the minimum cross-sectional nominal diameter of the protruding hole channel or the concave hole channel is 1-10:1.

[0045] The nominal diameter of a raised or recessed channel refers to the cross-sectional diameter of the raised or recessed channel. If the cross-sectional diameter of the raised channel remains constant, the average diameter is the diameter of any one cross-section. Raised channels have a smooth, streamlined shape. The average nominal diameter of the cross-section is the average of the maximum and minimum diameters of the cross-section.

[0046] The total thickness of the stacked rectangular staggered-hole inserts 1 is 1-10% smaller than the inner height of the outer tube, and the difference is less than the thickness of a single rectangular staggered-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 staggered-hole insert 1 is between 0.1-5mm, the width is between 5-50mm, and the length is between 50-1500mm.

[0047] The material of the staggered hole insert is one or more 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, ceramic, graphene, or silicon carbide.

[0048] The raised or recessed passage is in the shape of a tunnel entrance. Figure 1 , 2 3 and 6), round (circles 4 and 5), oval, trumpet-shaped ( Figure 7 One of them.

[0049] Multiple outer tubes are connected in parallel to form a unit, and multiple 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 must be limited to a certain range. To ensure high flow rates and volumes, multiple outer tubes are connected in parallel to form a unit, and multiple units formed by multiple outer tubes are connected in series to form an integrated microreactor, thereby improving the reaction rate.

[0050] The surface roughness Ra of the staggered insert is no greater than 0.8 μm. This prevents additional friction between the wire mesh insert and the outer sleeve during assembly and disassembly, thus avoiding scratches and preventing solid foreign objects from adhering to the reactor wall or dead corners of the wire mesh, which would increase cleaning difficulty. It also reduces unnecessary pressure drop.

[0051] The inner length of the outer tube is 2-5mm longer than the length of the staggered insert. This facilitates the insertion of the staggered insert into the inner cavity of the outer tube, ensuring that the installation of the end cap is not affected and effectively preventing the staggered insert from shaking.

[0052] A method for installing a detachable, stacked, staggered-hole mixing core microreactor, comprising the following specific steps:

[0053] S1: A plurality of rectangular staggered hole inserts 1 are stacked, the protruding part of the protruding hole on the lower layer of the rectangular staggered hole insert 1 is inserted into the opening of the protruding hole on the upper layer of the rectangular staggered hole insert 1 at the lower surface of the rectangular staggered hole insert 1, and the plurality of stacked rectangular staggered hole inserts 1 are inserted into the inner cavity of the outer sleeve 100 from one side of the outer sleeve 100;

[0054] S2: The ends of the outer sleeve 100 are sealed with a head, a sealing gasket is placed between the head and the outer sleeve 100, and the head is fixed on the outer sleeve with screws;

[0055] S3: A plurality of outer sleeves 100 are connected in parallel to form a unit, and a plurality of units formed by the plurality of outer sleeves 100 are connected in series to form an integrated micro-reactor; or a plurality of outer sleeves 100 are connected in series to form a unit, and a plurality of units formed by the plurality of outer sleeves 100 are connected in parallel to form an integrated micro-reactor.

[0056] Disassembly:

[0057] During actual use of the rectangular staggered hole insert 1, if scaling or clogging occurs inside the device, cleaning and maintenance are required. The screws on the heads at the inlet and outlet ends can be loosened, the heads can be removed, a thin rod can be used to push the rectangular staggered hole insert 1 out a small section at one end of the inlet and outlet, and then the insert can be pulled out directly from the other end, thereby completing the disassembly process.

[0058] A washable and maintainable detachable stacked staggered hole mixing core.

[0059] The rectangular staggered hole insert 1 is cleaned and maintained, usually by soaking it in a container containing a cleaning agent for a certain period of time, or by using an ultrasonic cleaner, and then using a fine brush to clean it, thereby completing the cleaning process.

[0060] A reassembly (including replacement of mixing core elements) of a detachable stacked staggered hole mixing core.

[0061] If some of the cores are found to be seriously clogged (additional maintenance is needed beyond ultrasonic cleaning) and need to be replaced, or if the base needs to be replaced with a different specification of the stacked mixed cores, the reassembly can be performed. The stacked mixed cores are convenient to process and meet the needs of batch manufacturing of mixed cores of different flux levels from the laboratory to production. At the same time, the mixed cores involve a variety of variable technical specifications, including symmetric and asymmetric structures, and can be easily adjusted, such as the combination and size of protruding or recessed channels, the shape and size of the opening, and the different combinations of multi-layer opening inserts, etc. The different requirements in the actual process and production process can be easily adjusted. The micro-channel reactor composed of the detachable stacked mixed cores can be easily used in the synthesis process of high-viscosity fine chemical intermediates. Compared with the conventional all-disassembled Bayer micro-reactor Sandwich mixer, from the discovery of possible clogging or fouling (such as rapid rise of system pressure drop), disassembly, cleaning and maintenance, possible replacement of mixed cores or units to reassembly, and the technical requirements for the operator are not high. From the discovery of possible clogging or fouling (such as rapid rise of system pressure drop), disassembly, cleaning and maintenance, possible replacement of mixed cores or units to reassembly, the maintenance operation time of the micro-reactor involved in the present application is shortened by at least 50%, even to 80%, greatly improving the maintenance efficiency in the process optimization or production process, and the technical requirements for the operator are not high.

[0062] The above description is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any skilled person in the art can make equivalent replacements or changes within the technical range disclosed by the present application according to the technical solution and inventive concept of the present application, which should be covered within the protection scope of the present application.

Claims

1. A detachable stacked staggered-well hybrid wick microreactor, characterized in that: The outer sleeve (100) includes a rectangular flat tube shape, and a multi-layered rectangular staggered hole insert sheet (1) inserted into the inner cavity of the outer sleeve (100), the rectangular staggered hole insert sheet (1) is provided with a plurality of transverse rows of protrusions and recessed channels, the rectangular staggered hole insert sheet (1) is provided with a beveled slot at the front end of each protruding channel, the protruding channels on adjacent transverse rows are staggered, and a straight line at the tail end of the protruding channels on the previous transverse row is the same as a straight line at the head end of the protruding channels on the next transverse row; between the two adjacent layers of the staggered hole insert sheet (1), the protruding part of the protruding channel on the lower insert sheet is inserted into the opening on the lower surface of the recessed channel on the upper insert sheet, and a gap is left in the middle of the stacked rectangular staggered hole insert sheets; The material of the staggered hole insert sheet is one or more of galvanized steel plate, cold and hot rolled plate, copper plate, nickel plate, stainless steel plate, aluminum alloy plate, hastelloy, polymer material, ceramic, graphene and silicon carbide.

2. The detachable stacked staggered-well hybrid wick microreactor of claim 1, wherein: The protrusion or recessed channel is one of a tunnel mouth shape, a circular shape, an oval shape and a horn shape.

3. The detachable stacked staggered-well hybrid wick microreactor of claim 1, wherein: The angle between the protrusion or recessed channel and the plane of the rectangular staggered hole insert sheet (1) is 30-60°.

4. The detachable stacked staggered-well hybrid wick microreactor of claim 1, wherein: The ratio of the average value of the nominal diameter of the cross section of the protrusion or recessed channel to the length of the protrusion channel is 1:2-20, and the ratio of the maximum nominal diameter of the cross section of the protrusion or recessed channel to the minimum nominal diameter of the cross section is 1-10:

1.

5. The detachable stacked staggered-well hybrid wick microreactor of claim 1, wherein: The number of the inserted multi-layered rectangular staggered hole insert sheets (1) in each outer sleeve is not less than 3, the sum of the total thicknesses of the stacked rectangular staggered hole insert sheets (1) is 1-15% less than the inner cavity height of the outer sleeve, and the smaller height is less than the thickness of one rectangular staggered hole insert sheet (1), and the ratio of the inner cavity height to the width of the outer sleeve is 1:2-20.

6. The detachable stacked staggered-well hybrid wick microreactor of claim 1, wherein: The single-layer thickness of the rectangular staggered hole insert sheet (1) is between 0.1-5 mm, the width is between 5-50 mm, and the length is between 50-1500 mm.

7. The detachable stacked staggered-well hybrid wick microreactor of claim 1, wherein: The two ends of the outer sleeve (100) are sealed by end covers, sealing washers are arranged at the contact positions between the end covers and the outer sleeve, and the end covers are fixed on the outer sleeve by screws; the same outer sleeve can be selected to have the same or different rectangular staggered hole insert sheets (1) for multi-layer stacking.

8. The detachable stacked staggered-well hybrid wick microreactor of claim 1, wherein: A plurality of outer sleeves (100) are connected in parallel to form a unit, and a plurality of units formed by the outer sleeves (100) are connected in series to form an integrated micro reactor; or a plurality of outer sleeves (100) are connected in series to form a unit, and a plurality of units formed by the outer sleeves (100) are connected in parallel to form an integrated micro reactor.

9. A mounting method of the detachable stacked staggered hole mixed core micro reactor according to claim 1, and the specific steps are as follows: S1: stack a plurality of rectangular staggered hole insert sheets (1), insert the protruding part of the protruding channel on the lower rectangular staggered hole insert sheet (1) into the opening on the lower surface of the recessed channel on the upper rectangular staggered hole insert sheet (1), and insert the stacked rectangular staggered hole insert sheets (1) into the inner cavity of the outer sleeve (100) from one side of the outer sleeve (100). S2: the outer sleeve (100) is sealed at both ends by a head, a sealing ring is arranged between the head and the outer sleeve (100), and the head is fixed on the outer sleeve by screws; S3: a plurality of the outer sleeves (100) are connected in parallel to form a unit, and a plurality of units formed by the outer sleeves (100) are connected in series to form an integrated micro reactor; or a plurality of the outer sleeves (100) are connected in series to form a unit, and a plurality of units formed by the outer sleeves (100) are connected in parallel to form an integrated micro reactor.

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