Micro-channel reactor capable of adjusting length of reaction channel

Abstract

The utility model discloses a micro-channel reactor capable of adjusting the length of a reaction channel, which comprises a bottom frame, a fixed frame and a movable frame are arranged on the front side and the rear side of the bottom frame, a plurality of reaction units arranged in a plane n shape are arranged between the fixed frame and the movable frame, and adjacent reaction units are connected through connecting pipes. Each reaction unit comprises reaction tubes which are longitudinally arranged in a shape like a Chinese character'ji ', and each reaction tube is formed by slidably inserting a plurality of Z-shaped tubes; the first Z-shaped pipe and the second Z-shaped pipe of the first reaction unit are respectively connected with a feeding pipe I and a feeding pipe II, and the tail end of the last Z-shaped pipe of the last reaction unit is connected with a discharging pipe; the first Z-shaped pipe of each reaction unit is fixed on the fixed frame, and the last Z-shaped pipe of each reaction unit is fixed on the movable frame. According to the micro-channel reactor disclosed by the utility model, the length of the reaction channel can be adjusted according to specific reaction conditions, the application range of the micro-channel reactor is enlarged, the flexibility is improved, and the micro-channel reactor has stirring, reaction condition prompting and heating functions.

Description

Technical Field

[0001] This utility model relates to the field of microchannel reactors, and in particular to a microchannel reactor with adjustable reaction channel length. Background Technology

[0002] Microchannel reactors have been widely used in chemical synthesis, pharmaceuticals, fine chemicals, and environmental protection due to their high mass and heat transfer efficiency, precise control of reaction conditions, high safety, and scalability. Existing microchannel reactors produce the desired product by passing reactants through microchannels for mixing and reaction. However, because the channel length is fixed, controlling the flow rate alone is insufficient to meet the reaction time requirements under different reaction conditions. Some materials are discharged before fully reacting, affecting the reaction efficiency and limiting their application range and flexibility. Furthermore, the narrow channels of microchannel reactors are prone to blockage. If blockage is not addressed promptly, it can pose a danger in some exothermic reactions. Utility Model Content

[0003] To address the aforementioned technical problems, this invention provides a microchannel reactor with adjustable reaction channel length, enabling the adjustment of the reaction channel length according to specific reaction conditions, thereby increasing its application range and improving its flexibility.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows:

[0005] A microchannel reactor with adjustable reaction channel length includes a base frame. Fixed and movable frames are arranged on the front and rear sides of the base frame. Several reaction units arranged in a planar Z-shape are installed between the fixed and movable frames. Adjacent reaction units are connected by connecting pipes. Each reaction unit includes reaction tubes arranged in a longitudinal Z-shape, each reaction tube being formed by slidingly inserting several Z-shaped tube segments. The first and second Z-shaped tubes of the first reaction unit are connected to feed pipe one and feed pipe two, respectively. The last Z-shaped tube of the last reaction unit is connected to an outlet pipe. The first Z-shaped tube of each reaction unit is fixed to the fixed frame, and the last Z-shaped tube is fixed to the movable frame. The movable frame can move back and forth along the base frame.

[0006] In the above scheme, a stirring mechanism is provided in the vertical section of the Z-shaped tube. The stirring mechanism includes a fixed impeller, a rotating impeller, a connecting shaft, and a scraper. The fixed impeller includes two sets, located at the upper and lower parts of the Z-shaped tube respectively. Each set includes a first fixed impeller and a second fixed impeller. The fixed impellers are fixedly connected to the inner wall of the Z-shaped tube. The rotating impeller includes two, located between the first fixed impeller and the second fixed impeller respectively. The two ends of the connecting shaft pass through the two first fixed impellers, and the end is connected to the second fixed impeller through a bearing. The rotating impeller is fixed to the connecting shaft. The scraper is installed on the connecting shaft and located between the two first fixed impellers.

[0007] In the above scheme, a receiving cavity is provided in the middle of the connecting tube, and a prompting mechanism is installed in the receiving cavity. The prompting mechanism includes a rotating gear, a guide striking post, a first spring, and a prompting bell. The rotating gear is installed in the connecting tube through a central shaft. The guide striking post is horizontally installed on the central shaft. The first spring is sleeved on the guide striking post, and the two ends of the first spring abut against the end of the guide striking post and the central shaft, respectively. The prompting bell is installed inside the receiving cavity and can collide with the guide striking post.

[0008] In the above scheme, a fixed rod and a lead screw are respectively provided on the left and right sides of the rear side of the base frame, and the fixed rod and the lead screw are respectively connected to the bottom of the movable frame, with a handle provided at the end of the lead screw.

[0009] In a further technical solution, the base frame is also provided with a locking mechanism, which includes two fixing plates, a locking post and a second spring. Several locking slots are arranged circumferentially on the handle. One end of the locking post is provided with a gripping block, the other end passes through the two fixing plates, and the end is embedded in the locking slot of the handle.

[0010] In the above scheme, a heating plate is provided in the middle of the base frame, and multiple heating wires are provided on the heating plate.

[0011] In the above scheme, a first support and a second support are respectively set on the left and right sides of the base frame. The first feed pipe and the second feed pipe are set on the first support, and the discharge pipe is set on the second support. A first flow meter and a second flow meter are respectively installed on the first feed pipe and the second feed pipe, and a third flow meter is installed on the discharge pipe.

[0012] In the above scheme, the connecting pipe between adjacent reaction units is located on the base frame.

[0013] In the above scheme, the bottom of the support legs of the base frame is provided with an anti-slip base plate.

[0014] Through the above technical solution, the microchannel reactor with adjustable reaction channel length provided by this utility model has the following beneficial effects:

[0015] 1. According to the reaction requirements of the reactants, this utility model allows the movable frame to move by gripping the handle and rotating the screw, so that the Z-shaped tube can be expanded or contracted, thereby adjusting the length of the reaction channel to adapt to the reaction requirements of different reactants.

[0016] 2. This utility model monitors the flow rate of the reactants using a first flow meter and a second flow meter. After the reactants have finished reacting and are discharged, a third flow meter monitors the flow rate of the reactants after the reaction, thus achieving the effect of real-time monitoring of the flow rate of the reactants, which can improve the accuracy of reaction control.

[0017] 3. In this invention, after the reactants are introduced into the Z-shaped tube, the rotating impeller is driven to rotate, which in turn drives the connecting shaft and scraper to rotate, thus achieving the effect of stirring the reactants and cleaning the inner wall of the Z-shaped tube. The stirring mechanism of this invention has a simple structure and small size, making it suitable for use in narrow microchannels.

[0018] 4. When the reactant flows into the connecting pipe, the rotating gear rotates, causing the guide striking column to rotate and strike the indicator bell, making the indicator bell sound. The sound of the indicator bell can indicate the flow of the reactant, so as to detect the blockage of the reactant in time.

[0019] 5. This utility model achieves the purpose of heating the reactants by heating the Z-shaped tube and connecting tube with the heating wire on the heating plate during the reaction of the reactants, so as to meet the reaction requirements of the reactants at a certain temperature.

[0020] 6. This utility model is equipped with a locking mechanism. When the locking pin is pulled backward to disengage from the handle, the second spring is compressed and contracted. When the handle is stopped from rotating, the locking pin is released, and the second spring rebounds, so that the locking pin resets and re-engages with the handle, thus achieving the effect of locking the handle and preventing accidental rotation of the handle. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0022] Figure 1 This is a schematic diagram of a microchannel reactor with adjustable reaction channel length disclosed in an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the base frame and the fixed frame structure;

[0024] Figure 3 This is a schematic diagram of the connection between adjacent Z-shaped pipes;

[0025] Figure 4 This is a schematic diagram of the locking mechanism;

[0026] Figure 5 This is a schematic diagram of the stirring mechanism;

[0027] Figure 6 This is an enlarged schematic diagram of the stirring mechanism;

[0028] Figure 7 For illustrative purposes only;

[0029] Figure 8 This is a schematic diagram of the heating wire.

[0030] In the diagram: 1. Base frame; 2. Anti-slip base plate; 3. Fixed frame; 4. Movable frame; 5. Connecting pipe; 6. Z-shaped pipe; 7. Feed pipe one; 8. Feed pipe two; 9. Discharge pipe; 10. First support; 11. Second support; 12. First flow meter; 13. Second flow meter; 14. Third flow meter; 15. Fixed rod; 16. Lead screw; 17. Handle; 18. Fixed plate; 19. Locking post; 20. Second spring; 21. Slot; 22. Grip block; 23. First fixed impeller; 24. Second fixed impeller; 25. Rotating impeller; 26. Connecting shaft; 27. Scraper; 28. Receiving cavity; 29. ​​Rotating gear; 30. Guide striking post; 31. First spring; 32. Alarm bell; 33. Central shaft; 34. Heating plate; 35. Heating wire. Detailed Implementation

[0031] 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.

[0032] This invention provides a microchannel reactor with adjustable reaction channel length, such as... Figure 1 and Figure 2 As shown, the system includes a base frame 1, with anti-slip base plates 2 at the bottom of the legs of the base frame 1 for stable placement on the ground. Fixed frames 3 and movable frames 4 are provided on the front and rear sides of the base frame 1. Several reaction units are installed between the fixed frames 3 and the movable frames 4 in a planar Z-shape arrangement, and adjacent reaction units are connected by connecting pipes 5 located on the base frame 1.

[0033] In this embodiment, seven reaction units are formed by connecting six connecting tubes 5. Each reaction unit includes reaction tubes arranged in a vertical Z-shape, such as... Figure 3 As shown, the reaction tube is formed by slidingly inserting several Z-shaped tubes 6 together, with a sealed connection at the insertion point. Rubber pads can be installed to prevent leakage.

[0034] The lower parts of the first Z-shaped tube 6 and the second Z-shaped tube 6 of the first reaction unit located on the left side of the base frame 1 are connected to the feed pipe 7 and the feed pipe 8, respectively. The end of the last Z-shaped tube 6 of the last reaction unit is connected to the discharge pipe 9. A first support 10 and a second support 11 are respectively installed on the left and right sides of the base frame 1. The feed pipe 7 and the feed pipe 8 are mounted on the first support 10, and the discharge pipe 9 is mounted on the second support 11. The first support 10 and the second support 11 provide support. A first flow meter 12 and a second flow meter 13 are respectively installed on the feed pipe 7 and the feed pipe 8, and a third flow meter 14 is installed on the discharge pipe 9.

[0035] When using this invention, first place the base frame 1 in the operating area, then introduce the two reactants to be reacted into the Z-shaped tubes 6 through feed pipe 7 and feed pipe 8 respectively. The two reactants flow through each Z-shaped tube 6, then through the connecting pipe 5 to each reaction unit, where they mix and react during the flow. Finally, the product is discharged from the outlet pipe 9. The flow rate of the reactants can be monitored by the first flow meter 12 and the second flow meter 13, and the flow rate of the product can be monitored by the third flow meter 14, thus improving the accuracy of reaction control.

[0036] The first Z-shaped tube 6 of each reaction unit is fixed to the fixed frame 3, and the last Z-shaped tube 6 is fixed to the movable frame 4; the movable frame 4 can move back and forth along the base frame 1. When the movable frame 4 moves forward or backward on the base frame 1, it can pull the Z-shaped tube 6 to move, so that the horizontal sections of adjacent Z-shaped tubes 6 are displaced, thereby adjusting the length of the reaction channel.

[0037] Specifically, such as Figure 1 As shown, the installation method of the movable frame 4 is as follows: a fixed rod 15 and a lead screw 16 are respectively set on the left and right sides of the rear side of the base frame 1. The fixed rod 15 and the lead screw 16 are respectively connected to the bottom of the movable frame 4. A handle 17 is set at the end of the lead screw 16. By rotating the handle 17, the movable frame 4 can slide on the fixed rod 15 and the lead screw 16.

[0038] like Figure 4As shown, the base frame 1 is also equipped with a locking mechanism, which includes two fixing plates 18, a locking post 19, and a second spring 20. Several slots 21 are arranged circumferentially on the handle 17. One end of the locking post 19 is equipped with a gripping block 22, and the other end passes through the two fixing plates 18, with its end embedded in the slot 21 of the handle 17. Using this locking mechanism, the handle 17 can be locked. When the handle 17 needs to be rotated, the gripping block 22 pulls the locking post 19 backward to disengage it from the handle 17. The second spring 20 is compressed and contracts, allowing the handle 17 to rotate. When the rotation of the handle 17 stops, the locking post 19 is released, and the second spring 20 rebounds, causing the locking post 19 to reset and re-engage with the handle 17. This effectively locks the handle 17 in place, preventing accidental rotation.

[0039] like Figure 5 and Figure 6 As shown, a stirring mechanism is installed in the vertical section of the Z-shaped tube 6. The stirring mechanism includes a fixed impeller, a rotating impeller 25, a connecting shaft 26, and a scraper 27. The fixed impellers consist of two sets, located at the upper and lower parts of the Z-shaped tube 6 respectively. Each set includes a first fixed impeller 23 and a second fixed impeller 24. The fixed impellers are fixedly connected to the inner wall of the Z-shaped tube 6 and remain stationary, thus guiding the flow of reactants. Two rotating impellers 25 are located between the first fixed impeller 23 and the second fixed impeller 24. The connecting shaft 26 passes through both first fixed impellers 23 at both ends and is connected to the second fixed impeller 24 at its end via a bearing. The rotating impellers 25 are fixed to the connecting shaft 26. The scraper 27 is mounted on the connecting shaft 26 and located between the two first fixed impellers 23. When the reactants flow into the Z-shaped tube 6, after passing through the fixed impeller, it can drive the rotating impeller 25 to rotate, thereby driving the connecting shaft 26 and the scraper 27 on it to rotate, thus playing the role of stirring the reactants and cleaning the inner wall of the Z-shaped tube 6.

[0040] like Figure 7 As shown, a receiving cavity 28 is provided in the middle of the connecting tube 5. A prompting mechanism is installed in the receiving cavity 28. The prompting mechanism includes a rotating gear 29, a guide striking post 30, a first spring 31, and a prompting bell 32. The rotating gear 29 is installed in the connecting tube 5 through a central shaft 33. The guide striking post 30 is horizontally installed on the central shaft 33. The first spring 31 is sleeved on the guide striking post 30. The two ends of the first spring 31 abut against the end of the guide striking post 30 and the central shaft 33, respectively. The prompting bell 32 is installed inside the receiving cavity 28 and can collide with the guide striking post 30.

[0041] The indicator mechanism of this device can indicate the flow of reactants. When reactants flow into the connecting pipe 5, it drives the rotating gear 29 to rotate, causing the guide striking post 30 to rotate and strike the indicator bell 32, thus indicating the flow of reactants and facilitating timely detection of any blockages. After the guide striking post 30 and the indicator bell 32 collide, the first spring 31 acts as a buffer and reset mechanism.

[0042] like Figure 8 As shown, a heating plate 34 is installed in the middle of the base frame 1, and multiple heating wires 35 are installed on the heating plate 34, which can heat the connecting pipes 5 between adjacent reaction units and the bottom of the Z-shaped pipes 6 to meet the temperature requirements of the reactants.

[0043] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A microchannel reactor with adjustable reaction channel length, characterized in that, The system includes a base frame, with fixed and movable frames on its front and rear sides. Several reaction units arranged in a planar Z-shape are installed between the fixed and movable frames. Adjacent reaction units are connected by connecting pipes. Each reaction unit includes reaction tubes arranged in a longitudinal Z-shape, which are formed by slidingly inserting several Z-shaped tubes. The first and second Z-shaped tubes of the first reaction unit are connected to feed pipe one and feed pipe two, respectively, and the last Z-shaped tube of the last reaction unit is connected to the discharge pipe. The first Z-shaped tube of each reaction unit is fixed to the fixed frame, and the last Z-shaped tube is fixed to the movable frame. The movable frame can move back and forth along the base frame.

2. The microchannel reactor with adjustable reaction channel length according to claim 1, characterized in that, A stirring mechanism is provided in the vertical section of the Z-shaped tube. The stirring mechanism includes a fixed impeller, a rotating impeller, a connecting shaft, and a scraper. The fixed impeller includes two sets, located at the upper and lower parts of the Z-shaped tube respectively. Each set includes a first fixed impeller and a second fixed impeller. The fixed impellers are fixedly connected to the inner wall of the Z-shaped tube. The rotating impeller includes two impellers, located between the first and second fixed impellers respectively. The two ends of the connecting shaft pass through the two first fixed impellers, and the end is connected to the second fixed impeller through a bearing. The rotating impeller is fixed to the connecting shaft. The scraper is installed on the connecting shaft and located between the two first fixed impellers.

3. A microchannel reactor with adjustable reaction channel length according to claim 1, characterized in that, A receiving cavity is provided in the middle of the connecting tube, and a prompting mechanism is installed in the receiving cavity. The prompting mechanism includes a rotating gear, a guide striking post, a first spring, and a prompting bell. The rotating gear is installed in the connecting tube through a central shaft. The guide striking post is horizontally installed on the central shaft. The first spring is sleeved on the guide striking post, and the two ends of the first spring abut against the end of the guide striking post and the central shaft, respectively. The prompting bell is installed inside the receiving cavity and can collide with the guide striking post.

4. A microchannel reactor with adjustable reaction channel length according to claim 1, characterized in that, Fixed rods and lead screws are respectively provided on the left and right sides of the rear side of the base frame. Fixed rods and lead screws are respectively connected to the bottom of the movable frame, and a handle is provided at the end of the lead screw.

5. A microchannel reactor with adjustable reaction channel length according to claim 4, characterized in that, The base frame is also equipped with a locking mechanism, which includes two fixing plates, a locking post and a second spring. Several locking slots are arranged around the circumference of the handle. One end of the locking post is equipped with a gripping block, the other end passes through the two fixing plates, and the end is embedded in the locking slot of the handle.

6. A microchannel reactor with adjustable reaction channel length according to claim 1, characterized in that, A heating plate is installed in the middle of the base frame, and multiple heating wires are installed on the heating plate.

7. A microchannel reactor with adjustable reaction channel length according to claim 1, characterized in that, The base frame is provided with a first support and a second support on its left and right sides respectively. The first feed pipe and the second feed pipe are provided on the first support, and the discharge pipe is provided on the second support. The first flow meter and the second flow meter are respectively installed on the first feed pipe and the second feed pipe, and the third flow meter is installed on the discharge pipe.

8. A microchannel reactor with adjustable reaction channel length according to claim 1, characterized in that, The connecting pipes between adjacent reaction units are located on the base frame.

9. A microchannel reactor with adjustable reaction channel length according to claim 1, characterized in that, The support legs of the base frame are equipped with anti-slip base plates.

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