Tubular three-dimensional micro-channel reactor

Abstract

The utility model relates to the technical field of chemical reaction equipment, and discloses a tubular three-dimensional micro-channel reactor which comprises a reactor inner tube and a reactor outer tube, a three-dimensional micro-channel module is fixed between the reactor inner tube and the reactor outer tube, and the reactor inner tube is coaxially fixed in the reactor outer tube; the three-dimensional micro-channel module is composed of micro-channel assemblies which are communicated with one another, and a solid framework formed by connecting solid particles is fixed in each micro-channel assembly; inner flow guide partition plates and outer flow guide partition plates which are alternately arranged are fixed on the three-dimensional micro-channel module, one ends of the inner flow guide partition plates are attached to the reactor inner pipe, and the outer flow guide partition plates are attached to the reactor outer pipe. According to the tubular three-dimensional micro-channel reactor disclosed by the utility model, a multi-dimensional micropore structure is arranged in the reaction channel, so that the advantages of a tubular micro-channel reactor and a plate-type micro-channel reactor are combined, and the tubular three-dimensional micro-channel reactor has porosity and large specific surface area, and provides a regional micro center for collision and reaction for materials, so that the movement distance of material molecules is greatly reduced, and the reaction speed is increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to chemical reaction equipment technical field, concretely is a kind of tubular three-dimensional microchannel reactor. BACKGROUND

[0002] Microchannel reactor features miniaturization of equipment, provides good heat transfer and mass transfer effect.Currently microchannel refers to the mixing equipment with hydraulic diameter in tens of microns to several millimeters, and its performance directly determines the conversion rate, selectivity and space utilization of chemical reaction reactor and other core effects.

[0003] CN102202774A discloses a "heart-shaped" structure microchannel reactor, which can achieve better mixing effect and higher mass transfer coefficient under high flow rate condition by inducing vortex and cyclone flow, but since the flow channel is mostly in series structure, it leads to excessive pressure drop, and is easily blocked, and the problem of stratification of immiscible two-phase fluid easily occurs under low flow rate condition.Meanwhile, the main limiting factor of plate structure in high pressure process is that when the plate area expands, the sealing difficulty will be greatly improved, so this kind of equipment mainly expands production capacity by increasing the number of plates, and the equipment manufacturing cost is high.

[0004] CN101663084A discloses a continuous flow reactor of a multi-hole structure mixer, which achieves the effect of enhancing mixing by changing the size of flow channel and utilizing multiple small holes to form jet flow.To achieve mixing by jet flow, the fluid passing through the multi-hole structure must reach a certain speed.Usually, the number of small holes of the mixer is not many, and the size of small holes cannot be too large, so the fluid flowing through the mixer will have a large pressure loss, and the number of mixers in a reactor is limited, and the risk of blockage during use is great, so the application is limited.

[0005] CN101952029A discloses a continuous flow reaction mixing device with multi-hole structure, which has complex structure, and the residence time of material in the reactor is limited by the structure and size of the mixer.

[0006] However, the reaction flow channel of tubular reactor is mostly simple in configuration, mainly flat channel or narrow gap, which can cause blockage during use, and the heat exchange is uneven, so a tubular three-dimensional microchannel reactor needs to be designed. UTILITY MODEL CONTENT

[0007] The utility model aims at providing a kind of tubular three-dimensional microchannel reactor to solve the problems in the prior art.

[0008] The utility model can be realized by the following technical solutions:

[0009] A tubular three-dimensional microchannel reactor includes an inner reactor tube and an outer reactor tube, wherein a three-dimensional microchannel module is fixed between the inner reactor tube and the outer reactor tube, and the inner reactor tube is coaxially fixed inside the outer reactor tube.

[0010] The three-dimensional microchannel module is composed of interconnected microchannel components, and a solid skeleton formed by the connection of solid particles is fixed inside the microchannel components.

[0011] The three-dimensional microchannel module is fixed with alternating inner and outer flow guide baffles. One end of the inner flow guide baffle is attached to the inner tube of the reactor, and the outer flow guide baffle is attached to the inner tube of the reactor.

[0012] The three-dimensional microchannel module is divided into multiple reaction modules by an inner flow guide baffle and an outer flow guide baffle. The mesh-like three-dimensional microchannel module is composed of an outer flow guide pool and an inner flow guide pool connected in series.

[0013] Furthermore, an outer clamping sleeve is provided on the outer side of the reactor outer tube, and an outer heat exchange medium conveying component is fixed on the outer clamping sleeve. The outer heat exchange medium conveying component includes an outer heat exchange medium inlet pipe and an outer heat exchange medium outlet pipe fixedly connected to the outer clamping sleeve. The inner guide pool and the inner guide baffle exchange heat with the inner heat exchange medium through the reactor inner tube, and the outer guide pool and the outer guide baffle exchange heat with the outer heat exchange medium through the reactor outer tube.

[0014] Furthermore, the inner and outer flow guide baffles are made of metal or non-metal materials. The inner and outer flow guide baffles are fixed to the upper and lower ends of the three-dimensional microchannel module. The inner and outer flow guide baffles are installed alternately to change the material flow direction in adjacent three-dimensional microchannel modules.

[0015] Furthermore, the inner and outer flow guide pools are circular channels or holes and slots formed on the flow guide baffles.

[0016] Furthermore, the three-dimensional microchannel module is provided with an outer flow guide pool and an inner flow guide pool on both sides, with one end of the outer flow guide baffle fixed between the two outer flow guide pools and one end of the inner flow guide baffle fixed between the two inner flow guide pools.

[0017] Furthermore, the solid particles of the solid framework are made of either a metallic material or a non-metallic material, and are cylindrical, disc-shaped, or cylindrical ring-shaped, with the three-dimensional microchannel module serving as a catalyst carrier.

[0018] Furthermore, the porosity of the microchannel component is 10%-80%, and the average pore size of the microchannel component is 1µm to 3000µm.

[0019] Furthermore, end plate one and end plate two are fixedly connected to both ends of the outer clamp sleeve, and a conveying pipe is fixedly connected to end plate one. The two ends of the conveying pipe are provided with inlet one and inlet two, and inlet one and inlet two are both connected to the outer guide pool.

[0020] Furthermore, the heat exchange unit consists of two concentric tubes, with an internal flow passage formed inside the inner tube and an external flow passage formed by the outer wall of the reaction channel and the jacket.

[0021] The beneficial effects of this utility model are:

[0022] 1. The present invention is a tubular three-dimensional microchannel reactor with a multi-dimensional microporous structure built into the reaction channel, which combines the advantages of tubular and plate microchannel reactors. It has porosity and large specific surface area, providing micro-centers for material collision and reaction, greatly reducing the distance of material molecules to move and increasing the reaction rate.

[0023] 2. The tubular three-dimensional microchannel reactor of this invention features a multi-dimensional orientation of the three-dimensional microchannel module, which effectively reduces the risk of blockage. Even if a single microchannel becomes blocked, the fluid will bypass the blocked channel and continue to flow. This effectively reduces the system pressure drop and improves upon the shortcomings of existing microreactors.

[0024] 3. The tubular three-dimensional microchannel reactor of this utility model avoids the drawbacks of easy clogging and large pressure drop of plate series channels by using three-dimensional microchannel modules. At the same time, the internal heat transfer is enhanced by switching the flow direction through the folding structure in the reaction channel, making the equipment simpler. Attached Figure Description

[0025] The present invention will be further described below with reference to the accompanying drawings.

[0026] Figure 1 This is a schematic diagram of the structure of the reactor of this utility model;

[0027] Figure 2 This is a schematic cross-sectional view of the reactor of this utility model;

[0028] Figure 3 This is a schematic diagram of the structure of the three-dimensional microchannel module of this utility model;

[0029] Figure 4 This is a partial schematic diagram of the flow of the reaction medium and heat exchange medium inside the reactor of this utility model;

[0030] Figure 5 This is a partial structural schematic diagram of the three-dimensional microchannel module and the flow guide pool of this utility model;

[0031] Figure 6 This is a schematic diagram of the structure of the three-dimensional microchannel module and the flow guide baffle of the reactor of this utility model.

[0032] The annotations in the attached figures are explained as follows:

[0033] 1. Three-dimensional microchannel module; 2. Reactor inner tube; 3. Reactor outer tube; 4. Outer clamp sleeve; 5. Feed pipe; 6. Discharge port; 7. External heat exchange medium conveying component; 8. Internal heat exchange medium inlet and outlet; 9. Internal guide baffle; 10. External guide baffle; 11. External guide pool; 12. Internal guide pool; 13. End plate one; 14. End plate two; 101. Solid skeleton; 102. Microchannel assembly; 501. Feed inlet one; 502. Feed inlet two; 701. External heat exchange medium outlet pipe; 702. External heat exchange medium inlet pipe. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0035] A tubular three-dimensional microchannel reactor, such as Figures 1-6 As shown, it includes a three-dimensional microchannel module 1, an inner reactor tube 2, an outer reactor tube 3, an outer clamping sleeve 4, a conveying pipe 5, a discharge port 6, an inner flow guide baffle 9, and an outer flow guide baffle 10.

[0036] The reactor inner tube 2 is coaxially fixed inside the reactor outer tube 3. The reactor inner tube 2 is supplied with internal heat exchange medium. A reaction channel is set between the reactor inner tube 2 and the reactor outer tube 3. The reaction channel is a pressure-bearing structure. The three-dimensional microchannel module 1 is the chemical reaction part. The three-dimensional microchannel module 1 is located inside the reaction channel, and the three-dimensional microchannel module 1 is provided with an inner flow guide baffle 9 and an outer flow guide baffle 10.

[0037] The inner flow guide baffle 9 is tightly attached to the outer wall of the reactor inner tube 2, and the outer flow guide baffle 10 is tightly attached to the inner wall of the reactor outer tube 3. Correspondingly, the other side has an outer flow guide pool 11 and an inner flow guide pool 12. Each baffle is made of metal or non-metal materials.

[0038] The inner flow guide baffle 9 and the outer flow guide baffle 10 are fixedly installed at the upper and lower ends of the three-dimensional microchannel module 1, with the inner flow guide baffle 9 and the outer flow guide baffle 10 being installed alternately. When the fluid flows out from the upper-level module, it encounters the flow guide baffle, changes direction, flows towards the three-dimensional microchannel module 1, passes through it, and then reaches the flow guide pool on the other side. Then the fluid direction changes and flows to the next adjacent three-dimensional microchannel module. The inner flow guide pool 12 and the outer flow guide pool 11 can be an annular channel formed by one side of the flow guide plate and the heat exchange wall, or they can be formed by openings on the flow guide baffle plate. The flow guide channel is close to the inner tube 2 and the outer tube 3 of the reactor.

[0039] The inner flow guide baffle 9 and the outer flow guide baffle 10 have the same structure. The two sides of the three-dimensional microchannel module 1 are respectively provided with an outer flow guide pool 11 and an inner flow guide pool 12. The outer flow guide pool 11 and the inner flow guide pool 12 are connected in series. One end of the outer flow guide baffle 10 is fixed between the two outer flow guide pools 11, and one end of the inner flow guide baffle 9 is fixed between the two inner flow guide pools 12.

[0040] An outer clamping sleeve 4 is fitted on the outer side of the reactor outer tube 3. An outer heat exchange medium conveying component 7 is fixedly installed on the outer clamping sleeve 4. The outer heat exchange medium conveying component 7 includes an outer heat exchange medium inlet pipe 702 and an outer heat exchange medium outlet pipe 701 that are fixedly connected to the outer clamping sleeve 4. The inner guide pool 12 and the inner guide baffle 9 exchange heat with the inner heat exchange medium through the reactor inner tube 2. The outer guide pool 11 and the outer guide baffle 10 exchange heat with the outer heat exchange medium through the reactor outer tube 3.

[0041] like Figure 2 As shown, the three-dimensional microchannel module 1 is composed of interconnected microchannel components 102. The microchannel ports are open and their direction is three-dimensional and multi-directional, allowing fluid to flow from one side of the module to any other side. The microchannel components 102 are composed of a solid skeleton 101 forming a three-dimensional mesh structure with a porosity of 10%-80%, preferably 20%-50%. The solid skeleton 101 is formed by connecting solid particles. The average pore size of the microchannel components 102 is 1µm to 3000µm, preferably 50µm to 500µm.

[0042] The solid particles are made of either a metallic or non-metallic material, and are cylindrical, disc-shaped, or cylindrical ring-shaped. They are assembled between the inner tube 2 and the outer tube 3 of the reactor. The three-dimensional microchannel module 1 can serve as a catalyst carrier. The target catalyst is loaded onto the microchannel module and then assembled for use.

[0043] The two ends of the outer clamp sleeve 4 are fixedly connected to end plate 13 and end plate 14 respectively. The end plate 13 is fixedly connected to the conveying pipe 5. The two ends of the conveying pipe 5 are provided with inlet 1 501 and inlet 2 502. Inlet 1 501 and inlet 2 502 are both connected to the outer guide pool 11. Inlet 1 501 and inlet 2 502 are used for material a and material b to enter the reactor channel and mix in the outer guide pool 11. The outer guide baffle 10 changes the flow direction of the mixture of material a and material b and enters the three-dimensional microchannel module 1.

[0044] like Figure 3 , Figure 4 As shown, the material flows within the three-dimensional microchannel module 1 of the reactor. Its direction is changed by the outer guide baffle 10, and the material flows from the outer guide pool 11 to the inner guide pool 12. Then, after being blocked by the inner guide baffle 9, it flows from the inner guide pool 12 to another outer guide pool 11. This process is repeated, and the material changes direction multiple times, moving within the three-dimensional microchannel module 1. Finally, it flows into the end plate 2 14, where the end plate 2 14 is fixedly provided with an outlet 6 for discharging the product.

[0045] When the material enters the microchannel component 102 in the three-dimensional microchannel module 1, the microchannel component 102 formed by the microparticle mesh 101 increases the specific surface area of ​​the material contact by multiple times, and the fluid direction changes randomly, causing collisions and increasing the mass transfer efficiency by multiple times. The fluid flows through the three-dimensional microchannel module 1, enters the inner guide pool 12, gathers and mixes again, changes the flow direction, enters the next level three-dimensional microchannel module 1, and then enters the outer guide pool 11.

[0046] The reactor consists of two concentric tubes, with the inner tube 2 having an inlet and outlet 8 for the internal heat exchange medium fixed at both ends.

[0047] The working principle is as follows:

[0048] Materials a and b are fed into the three-dimensional microchannel module 1 and flow within it. Their direction is changed by the outer guide baffle 10, and the materials flow from the outer guide pool 11 to the inner guide pool 12. After being blocked by the inner guide baffle 9, they flow from the inner guide pool 12 to another outer guide pool 11. During this process, the inner guide pool 12 and the inner guide baffle 9 exchange heat with the inner heat exchange medium through the inner tube 2 of the reactor, while the outer guide pool 11 and the outer guide baffle 10 exchange heat with the outer heat exchange medium through the outer tube 3 of the reactor.

[0049] The material moves alternately within multiple three-dimensional microchannel modules 1 in the manner described above. This process is repeated, and the material changes direction multiple times, moving within the three-dimensional microchannel modules 1. Finally, it flows to the discharge port 6 in the end plate 2 14 to discharge the product c.

[0050] The baffle plate design forcibly increases the heat exchange efficiency between the fluid and the hot and cold media, avoids the formation of internal heat exchange dead zones, and thus improves the system's heat exchange efficiency. Simultaneously, the presence of both internal and external heat exchange tubes increases the heat exchange surface area, further enhancing heat exchange efficiency.

[0051] The main pressure-bearing structure of the entire system is the reaction tube and the internal heat exchange tube. Due to its tubular design, the materials are readily available, and the pressure range of the reactor is extended to over 10 MPa.

[0052] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A tubular three-dimensional microchannel reactor, comprising an inner reactor tube (2) and an outer reactor tube (3), characterized in that, A three-dimensional microchannel module (1) is fixed between the inner tube (2) and the outer tube (3) of the reactor, and the inner tube (2) is coaxially fixed inside the outer tube (3); The three-dimensional microchannel module (1) is composed of interconnected microchannel components (102), and a solid skeleton (101) formed by connecting solid particles is fixed inside the microchannel components (102). The three-dimensional microchannel module (1) is fixed with alternating inner flow guide baffles (9) and outer flow guide baffles (10). One end of the inner flow guide baffle (9) is attached to the inner tube (2) of the reactor, and the outer flow guide baffle (10) is attached to the outer tube (3) of the reactor. The three-dimensional microchannel module (1) is divided into multiple reaction modules by an inner flow guide baffle (9) and an outer flow guide baffle (10). The mesh-like three-dimensional microchannel module (1) is connected in series by an outer flow guide pool (11) and an inner flow guide pool (12).

2. The tubular three-dimensional microchannel reactor according to claim 1, characterized in that, The outer tube (3) of the reactor is provided with an outer clamp sleeve (4), and an outer heat exchange medium conveying component (7) is fixed on the outer clamp sleeve (4). The outer heat exchange medium conveying component (7) includes an outer heat exchange medium inlet pipe (702) and an outer heat exchange medium outlet pipe (701) that are fixedly connected to the outer clamp sleeve (4). The inner guide pool (12) and the inner guide baffle (9) exchange heat with the inner heat exchange medium through the reactor inner tube (2), and the outer guide pool (11) and the outer guide baffle (10) exchange heat with the outer heat exchange medium through the reactor outer tube (3).

3. A tubular three-dimensional microchannel reactor according to claim 1, characterized in that, The inner flow guide baffle (9) and the outer flow guide baffle (10) are made of metal or non-metal materials. The inner flow guide baffle (9) and the outer flow guide baffle (10) are fixed to the upper and lower ends of the three-dimensional microchannel module (1). The inner flow guide baffle (9) and the outer flow guide baffle (10) are installed alternately to change the material flow direction in adjacent three-dimensional microchannel modules (1).

4. A tubular three-dimensional microchannel reactor according to claim 2, characterized in that, The inner guide pool (12) and the outer guide pool (11) are circular channels or holes and slots opened on the guide baffle.

5. A tubular three-dimensional microchannel reactor according to claim 4, characterized in that, The three-dimensional microchannel module (1) is provided with an outer flow guide pool (11) and an inner flow guide pool (12) on both sides respectively. One end of the outer flow guide baffle (10) is fixed between the two outer flow guide pools (11), and one end of the inner flow guide baffle (9) is fixed between the two inner flow guide pools (12).

6. A tubular three-dimensional microchannel reactor according to claim 1, characterized in that, The solid particles of the solid framework (101) are made of metal or non-metal materials and are cylindrical, disc-shaped or cylindrical ring-shaped. The three-dimensional microchannel module (1) serves as a catalyst carrier.

7. A tubular three-dimensional microchannel reactor according to claim 6, characterized in that, The porosity of the microchannel component (102) is 10%-80%, and the average pore size of the microchannel component (102) is 1µm to 3000µm.

8. A tubular three-dimensional microchannel reactor according to claim 2, characterized in that, The two ends of the outer clamp sleeve (4) are respectively fixed with end plate one (13) and end plate two (14). The end plate one (13) is fixed with a conveying pipe (5). The two ends of the conveying pipe (5) are provided with inlet one (501) and inlet two (502). Inlet one (501) and inlet two (502) are both connected to the outer guide pool (11).

9. A tubular three-dimensional microchannel reactor according to claim 1, characterized in that, The reactor consists of two concentric tubes. Inside the inner tube, an internal flow passage is formed by the inner tube itself, and outside the reaction channel, the outer wall and the jacket form an external flow passage.

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