A helical microchannel reactor

Abstract

The application belongs to the technical field of reaction containers, and specifically provides a spiral micro-channel reactor, which comprises a box body having an inner cavity for containing a heat exchange medium; a reaction pipeline is arranged in the inner cavity, two ends of the reaction pipeline form an inlet and an outlet of a reaction medium respectively, the middle part of the inner cavity has a reference position, one end of the reaction pipeline is taken as a starting point of the reference position, the other end of the reaction pipeline is wound around the reference position and has a multi-turn structure; each turn of the reaction pipeline is square and comprises two first pipe parts and two second pipe parts arranged side by side, the first pipe parts and the second pipe parts are perpendicular to each other, a first spiral shaft coaxial with the first pipe part and having a length smaller than that of the first pipe part is embedded in the first pipe part, and a second spiral shaft coaxial with the second pipe part and having a length smaller than that of the second pipe part is embedded in the second pipe part; a rotating rod is rotatably arranged on the outer wall of the box body, the rotating rod can be rotated to be perpendicular to the first pipe part or the second pipe part, the rotating rod is connected with a magnetic rod group, and the magnetic rod group can be magnetically attracted to the first spiral shaft or the second spiral shaft.

Description

Technical Field

[0001] This application belongs to the field of pipeline connection technology, and specifically provides a spiral microchannel reactor. Background Technology

[0002] Microchannel plate reactors enable continuous production with short reaction times and precise temperature control, but their pressure resistance is limited due to the bonding and sealing process between the heat exchange plates and the reaction plates. Common plate microchannel reactors have simple reaction structures and cannot provide a sufficiently mixed flow environment for the reaction medium.

[0003] In the relevant technical solutions, the plate-type microchannel reactor is replaced with a box-shaped reactor and an integrated reaction pipeline, with the reaction pipeline wound around a certain point in a multi-turn structure. To increase the residence time of the reaction medium in the reaction pipeline and increase its flow path, a helical blade is also installed in the reaction pipeline, which is bent and shaped together with the reaction pipeline.

[0004] In the above technical solution, when the helical blade and the reaction pipeline are bent together, the helical blade and the reaction pipeline form a channel with a small cross-sectional size, making it difficult for the helical blade to move horizontally along the reaction pipeline. Over long-term use, deposits can easily form on the inner wall of the reaction pipeline, even causing blockage of the helical channel. Summary of the Invention

[0005] The purpose of this invention is to provide a spiral microchannel reactor to at least solve one of the above-mentioned technical problems.

[0006] To address the aforementioned problems in the prior art, this invention provides a spiral microchannel reactor, comprising a housing having an inner cavity for containing a heat exchange medium; a reaction pipeline is provided within the inner cavity, with an inlet and an outlet for the reaction medium formed at both ends of the reaction pipeline, respectively; a reference position is located in the middle of the inner cavity; one end of the reaction pipeline starts from the reference position, and the other end is wound around the reference position in a multi-turn structure; each turn of the reaction pipeline is square and includes two parallel first tube sections and two parallel second tube sections, the first and second tube sections being perpendicular to each other.

[0007] A first spiral shaft, coaxial and shorter than the first tube, is nested within the first tube section. A second spiral shaft, coaxial and shorter than the second tube section, is nested within the second tube section. A rotating rod is rotatably mounted on the outer wall of the housing. The rotating rod can rotate to be perpendicular to the first or second tube section. The rotating rod is connected to a magnetic rod assembly, which can magnetically engage with the first or second spiral shaft. The magnetic rod assembly can move relative to the rotating rod in a direction perpendicular to the rotating rod, thereby driving the first spiral shaft to translate along the first tube section or driving the second spiral shaft to translate along the second tube section.

[0008] The beneficial effects of one or more of the above technical solutions:

[0009] In this design, when the reaction pipeline is wound into a multi-turn square structure, each turn of the reaction pipeline includes a first tube section and a second tube section that are perpendicular to each other. A first spiral shaft, coaxial and shorter than the first tube section, is nested within the first tube section, and a second spiral shaft, coaxial and shorter than the second tube section, is nested within the second tube section. This arrangement replaces a single helical blade shaft with multiple separately arranged first and second spiral shafts. Furthermore, this design facilitates driving a single first spiral shaft to translate within its corresponding first tube section, or driving a single second spiral shaft to translate within its corresponding second tube section. This allows for the scraping of accumulated material from the inner wall of the reaction pipeline through the translational movement of the first and second spiral shafts, and the repeated pushing of the blocked portion to eliminate it.

[0010] In addition, the translational motion of the first spiral shaft along the first tube and the translational motion of the second spiral shaft along the second tube in this scheme can disturb the reaction medium in the reaction pipeline, so that different reaction media are fully mixed and the reaction efficiency is improved.

[0011] In this design, a rotating rod is installed on the outer wall of the housing. The rotation of this rod rotates the magnetic rod assembly to a position perpendicular to either the first or second tube. At this point, the magnetic rod assembly can drive the first and second helical shafts to translate in a non-contact manner from outside the housing. The translational motion of a single magnetic rod assembly perpendicular to the rotating rod can simultaneously drive the translational motion of multiple first or second helical shafts, thus improving the efficiency of the magnetic rod assembly. Attached Figure Description

[0012] The following description refers to the accompanying drawings, in which:

[0013] Figure 1 This is an isometric view of the box body after the box cover has been removed in an embodiment of the present invention;

[0014] Figure 2 This is a schematic diagram of the structure of the helical shaft in an embodiment of the present invention;

[0015] Figure 3 This is a cross-sectional view of the housing and reaction pipeline in an embodiment of the present invention;

[0016] Figure 4 This is a side view of the box in an embodiment of the present invention;

[0017] Figure 5 This is a schematic diagram of the rotating rod and magnetic rod assembly installed on the outer wall of the box in an embodiment of the present invention.

[0018] In the diagram, 1. Box body; 101. Inner cavity; 102. Heat exchange medium inlet; 103. Heat exchange medium outlet; 104. Box cover; 2. Reaction pipeline; 201. First pipe section; 202. Bend section; 203. Second pipe section; 204. Inlet; 205. Outlet; 3. Spiral shaft; 5. Rotating rod; 6. Magnetic rod assembly; 601. Rod; 602. Electromagnet; 604. Guide rod; 605. Linear drive component. Detailed Implementation

[0019] Those skilled in the art should understand that the embodiments described below are merely preferred embodiments of this application and do not imply that this application can only be implemented through these preferred embodiments. These preferred embodiments are merely used to explain the technical principles of this application and are not intended to limit the scope of protection of this application. Based on the preferred embodiments provided in this application, all other embodiments obtained by those skilled in the art without creative effort should still fall within the scope of protection of this application.

[0020] It should be noted that in the description of this application, terms such as "center," "upper," "lower," "top," "bottom," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] like Figures 1-5 As shown, a typical embodiment of this application provides a spiral microchannel reactor, including a housing 1, which has an inner cavity 2 for containing a heat exchange medium; a reaction pipeline 2 is provided in the inner cavity 2, with an inlet 204 and an outlet 205 of the reaction medium formed at both ends of the reaction pipeline 2, and a reference position in the middle of the inner cavity 2. One end of the reaction pipeline 2 starts from the reference position, and the other end is wound around the reference position in a multi-turn structure; each turn of the reaction pipeline 2 is square and includes two parallel first tube sections 201 and two parallel second tube sections 203, with the first tube sections 201 and the second tube sections 203 perpendicular to each other.

[0022] See Figure 1 In this embodiment, the length and width of the box 1 are equal, and the height of the box 1 is much smaller than its own length and width.

[0023] Specifically, in order to install the reaction pipeline 2 inside the cavity 2 of the housing 1, the housing 1 in this embodiment includes a main body with an opening at the upper end. A housing cover 104 is installed at the opening at the upper end of the main body and is fixed to the main body by welding or bolting. To achieve a seal between the two, a sealing gasket or sealant is filled between the housing cover 104 and the main body.

[0024] Specifically, the two ends of the reaction pipeline 2 extend from the cover 104, thereby enabling the inlet 204 and outlet 205 of the reaction medium to be connected to the corresponding supply or recovery structure.

[0025] The aforementioned reference position can be located at the center of the inner cavity 2 of the housing 1, thereby allowing the reaction pipeline 2 to be wound around the center of the housing 1. In other embodiments, the reference position can be offset from the center of the inner cavity 2 of the housing 1, as long as the reference position is approximately located in the middle of the inner cavity 2 of the housing 1.

[0026] In this embodiment, the reaction pipeline 2 can be made of metal or polyetheretherketone (PEEK). Preferably, the reaction pipeline 2 is made of PEEK, which gives it better high-temperature resistance and corrosion resistance. When the reaction pipeline 2 is made of metal, a high-temperature and corrosion-resistant coating can be applied to its surface.

[0027] To increase the flow path length of the reaction medium in the reaction pipeline, and thus increase the reaction time of the reaction medium, in this embodiment, a first spiral shaft with a coaxial length less than that of the first pipe section 201 is nested in the first pipe section 201, and a second spiral shaft with a coaxial length less than that of the second pipe section 203 is nested in the second pipe section 203; a rotating rod 5 is rotatably installed on the outer wall of the housing 1, and the rotating rod 5 can rotate to be perpendicular to the first pipe section 201 or the second pipe section 203. The rotating rod 5 is connected to a magnetic rod assembly 6, and the magnetic rod assembly 6 can magnetically engage with the first spiral shaft or the second spiral shaft. The magnetic rod assembly 6 can move relative to the rotating rod 5 in a direction perpendicular to the rotating rod 5, so as to drive the first spiral shaft to translate along the first pipe section 201, or drive the second spiral shaft to translate along the second pipe section 203.

[0028] Specifically, the inner cavity 2 of the box body 1 is also a square structure, that is, the first tube 201 and the second tube 203 are parallel or perpendicular to the side wall of the inner cavity 2 of the box body 1.

[0029] Specifically, the first tube section 201 and the second tube section 203 here are part of the reaction pipeline 2, and each turn of the reaction pipeline 2 has two first tube sections 201 and two second tube sections 203. That is, when the reaction pipeline 2 is wound into N turns, there are 2N first tube sections 201 and second tube sections 203.

[0030] See Figure 1As the reaction pipe 2 winds outward from the reference position, from the center of the inner cavity 2 of the housing 1 outward, the lengths of the first pipe section 201 and the second pipe section 203 increase sequentially. Correspondingly, the first helical shaft in the first pipe section 201 and the second helical shaft in the second pipe section 203 also gradually increase in size.

[0031] It should be noted that in this embodiment, the first spiral shaft and the second spiral shaft are only located in different tubes. They have the same structure, and their lengths can be the same or different.

[0032] The aforementioned housing 1 has a rotating rod 5 rotatably mounted on its outer wall. Specifically, the rotation axis of the rotating rod 5 is perpendicular to the reference plane defined by the length and width directions of the housing 1. Preferably, the rotation center of the rotating rod 5 is located at the center of the outer wall of the housing 1. The rotating rod 5 can change its angle with the first tube 201 and the second tube 203 by rotation.

[0033] When the rotating rod 5 rotates to be perpendicular to the first tube 201, the magnetic rod assembly 6 magnetically engages the first helical shaft in the first tube 201. When the magnetic rod assembly 6 moves perpendicular to the rotating rod 5, it drives the first helical shaft to translate along the first tube 201. When the rotating rod 5 rotates to be perpendicular to the second tube 203, the magnetic rod assembly 6 magnetically engages the second helical shaft in the second tube 203. When the magnetic rod assembly 6 moves perpendicular to the rotating rod 5, it drives the second helical shaft to translate along the second tube 203.

[0034] Specifically, to avoid motion interference, the inlet 204 and outlet 205 of the reaction medium, as well as the outlet 103 of the heat exchange medium, are located at the cover 104. The rotating rod 5 and the magnetic rod assembly 6 are located on the side of the housing 1 away from the cover 104.

[0035] In this embodiment, the outer wall of the housing 1 is provided with a heat exchange medium inlet 102 and a heat exchange medium outlet 103 that communicate with the inner cavity 2.

[0036] For details, see Figure 3 and Figure 4 Here, the heat exchange medium inlet 102 is located on the side wall of the box 1, and the heat exchange medium outlet 103 is located in the middle of the box cover 104.

[0037] In this embodiment, the reaction pipeline 2 is wound within a first plane, and both the rotating rod 5 and the magnetic rod assembly 6 are parallel to the first plane. Specifically, the first plane is parallel to the plane defined by the length and width directions of the housing 1.

[0038] In this embodiment, the rotating rod 5 and the magnetic rod assembly 6 are connected by a guide rod 604 and a guide hole. Specifically, support plates are provided at both ends of the rotating rod 5, and guide holes are provided on the support plates. The guide rod 604 passes through the guide holes, one end of the guide rod 604 is perpendicular to and fixed to the magnetic rod assembly 6, and the other end passes out of the guide hole.

[0039] In this embodiment, the magnetic rod assembly 6 includes a rod 601, on which a plurality of electromagnets 602 are provided. The electromagnets 602 can slide and be positioned along the length of the rod 601.

[0040] In this embodiment, the number of electromagnets 602 is equal to the number of turns of the reaction tube 2.

[0041] In this embodiment, the rod 601 is provided with a sliding groove along the length of the rod 601, an electromagnet 602 is slidably installed in the sliding groove, and a locking member is provided at the rod 601 to lock the electromagnet 602.

[0042] In this embodiment, the locking component includes a locking screw, the head of which passes through the rod 601 and extends into the slide groove.

[0043] In this embodiment, the magnetic rod assembly 6 and the rotating rod 5 are connected by a linear drive 605, the driving direction of which is perpendicular to the rotating rod 5. Specifically, a linear drive 605 is installed between the rod 601 and the rotating rod 5, and this linear drive 605 can be a cylinder or an electric push rod. In other embodiments, an electromagnetic adsorption structure and a spring can be provided between the rotating rod 5 and the rod 601. When the electromagnetic adsorption structure is energized, the rotating rod 5 and the rod 601 are attracted to each other and the spring is compressed. When the electromagnetic adsorption structure is de-energized, the rotating rod 5 and the rod 601 move away from each other under the action of the spring.

[0044] In other embodiments, the electromagnet 602 is fixed to a magnet, which can slide along the groove. The rod 601 is also made of ferromagnetic material, and the magnetic attraction between the magnet and the rod 601 enables the electromagnet 602 to slide and be positioned along the length of the groove.

[0045] In this embodiment, the first pipe section 201 and the second pipe section 203 are connected by the bend section 202. Specifically, the first pipe section 201, the second pipe section 203, and the bend section 202 in the reaction pipe 2 are integrally formed.

[0046] In this embodiment, the outer diameter of the first spiral shaft and the second spiral shaft are equal to the inner diameter of the reaction pipeline 2.

[0047] Preferably, in this embodiment, the reaction pipeline 2 is made of a non-ferromagnetic material, while the first and second spiral shafts are made of a ferromagnetic material.

[0048] Specifically, in this embodiment, the first and second helical shafts may consist only of helical blades arranged around a certain axis; in other embodiments, they may also include an actual central shaft, with the helical blades arranged around the central shaft.

[0049] The technical solutions of this application have been described in conjunction with the preferred embodiments above. However, it will be readily understood by those skilled in the art that the scope of protection of this application is not limited to the above preferred embodiments. Without departing from the technical principles of this application, those skilled in the art can disassemble and combine the technical solutions in the above preferred embodiments, and can also make equivalent changes or substitutions to the relevant technical features. Any changes, equivalent substitutions, improvements, etc., made within the technical concept and / or technical principles of this application will fall within the scope of protection of this application.

Claims

1. A spiral microchannel reactor, comprising a housing having an inner cavity for containing a heat exchange medium; a reaction pipeline is provided in the inner cavity, with an inlet and an outlet for the reaction medium formed at both ends of the reaction pipeline, a reference position in the middle of the inner cavity, one end of the reaction pipeline starting from the reference position, and the other end wound around the reference position in a multi-turn structure; each turn of the reaction pipeline is square and includes two parallel first tube sections and two parallel second tube sections, the first tube sections and the second tube sections being perpendicular to each other, characterized in that: The first tube section contains a coaxial first spiral shaft with a length shorter than that of the first tube section, and the second tube section contains a coaxial second spiral shaft with a length shorter than that of the second tube section. A rotating rod is rotatably mounted on the outer wall of the box. The rotating rod can rotate to be perpendicular to the first tube or the second tube. The rotating rod is connected to a magnetic rod assembly. The magnetic rod assembly can magnetically engage with the first helical shaft or the second helical shaft. The magnetic rod assembly can move relative to the rotating rod in a direction perpendicular to the rotating rod to drive the first helical shaft to translate along the first tube, or drive the second helical shaft to translate along the second tube. The magnetic rod assembly includes a rod with multiple electromagnets mounted on it. These electromagnets can slide and be positioned along the length of the rod. The number of electromagnets is equal to the number of turns in the reaction tube. The rod has a groove along its length, in which the electromagnets are slidably mounted. A locking element is provided at the rod to lock the electromagnets. The magnetic rod assembly is connected to the rotating rod via a linear drive, the driving direction of which is perpendicular to the rotating rod.

2. The spiral microchannel reactor according to claim 1, characterized in that, The outer wall of the housing is provided with a heat exchange medium inlet and a heat exchange medium outlet that connect to the inner cavity.

3. The spiral microchannel reactor according to claim 1, characterized in that, The reaction pipeline is wound in a first plane, and the rotating rod and the magnetic rod assembly are both parallel to the first plane.

4. The spiral microchannel reactor according to claim 1, characterized in that, The locking element includes a locking screw, the head of which passes through the rod and extends into the groove.

5. The spiral microchannel reactor according to claim 1, characterized in that, The first tube section and the second tube section are connected by a bend.

6. The spiral microchannel reactor according to claim 1, characterized in that, The outer diameter of the first and second spiral shafts is equal to the inner diameter of the reaction pipeline.

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