Microreactor feeding device

Abstract

The utility model provides a microreactor feeding device which comprises a feeding bin, a material quantity control mechanism and a microreactor, a feeding pipe is arranged at the top of the feeding bin, the feeding pipe is communicated with the feeding bin and is tangent to the outer wall of the feeding bin, one end, far away from the feeding bin, of the feeding pipe is connected with a feeding pump, and the feeding bin is connected with the microreactor through a material conveying mechanism; the material quantity control mechanism comprises a fixed cylinder and a floating plate, the top end of the fixed cylinder is fixedly connected with the inner wall of the top of the feeding bin, the bottom end of the fixed cylinder is open, the floating plate is slidably connected into the fixed cylinder, a contact rod is fixed to the top end of the floating plate, and a proximity sensor is fixed to the inner wall of the top end of the fixed cylinder and electrically connected with the feeding pump. The material quantity control mechanism is slightly influenced by the state of the feeding pump, and the accurate feeding quantity can be ensured. Meanwhile, the feeding pipe is tangent to the feeding bin, and the materials can form rotational flow after being fed into the feeding bin, so that the materials are further mixed, and sufficient mixing of the materials is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of microchannel reactors, in particular to a microreactor feeding device. Background Art

[0002] Microreactors, also known as microchannel reactors, are micro reactors with characteristic dimensions between 10 and 300 microns (or 1000 microns) manufactured using precision machining technology. Microreactors have excellent heat and mass transfer capabilities, and can achieve instantaneous uniform mixing of materials and efficient heat transfer. Many reactions that cannot be achieved in conventional reactors can be achieved in microreactors. At present, microreactors have been widely used in the research and development of chemical process, and their application in commercial production is increasing. The main application areas of microreactors include organic synthesis processes, preparation of micron and nano materials, and production of daily chemicals.

[0003] At present, the way to control the feed amount of the microreactor is usually to control the material flow rate, such as using a pump to drive the material into the device, and controlling the material flow rate by adjusting the pump speed or turning the pump on / off. This control method is easily affected by the pumping equipment. For example, when the pumping pipeline or pump is blocked, the material flow rate at the blocked point will decrease, thereby affecting the actual flow rate, or when the sealing performance of the pumping pipeline or pump decreases, a certain amount of air will be inhaled during the pumping process, affecting the actual flow rate; at the same time, when the material to be reacted is introduced into the microreactor, uneven material mixing will occur, affecting the reaction rate and selectivity. Therefore, a microreactor feeding device that can ensure uniform material mixing and reliable feed amount is needed. Utility Model Content

[0004] In order to solve the problems existing in the background technology, the utility model proposes a microreactor feeding device, including a feeding bin, a feed quantity control mechanism and a microreactor, wherein a feeding pipe is provided on the top of the feeding bin, the feeding pipe is communicated with the feeding bin and is tangent to the outer wall of the feeding bin, a feeding pump for feeding is connected to one end of the feeding pipe away from the feeding bin, and the feeding bin is connected to the microreactor through a feeding mechanism;

[0005] The material quantity control mechanism includes a fixed cylinder and a floating plate. The top of the fixed cylinder is fixedly connected to the inner wall of the top of the feed bin, and the bottom end of the fixed cylinder is open. The floating plate is slidably connected in the fixed cylinder. A contact rod is fixed to the top of the floating plate. A proximity sensor is fixed to the inner wall of the top of the fixed cylinder. The proximity sensor corresponds to the position of the contact rod, and the proximity sensor is electrically connected to the feed pump.

[0006] Preferably, there are two feed pipes, which are respectively arranged on both sides of the fixed cylinder, and the feeding directions of the two feed pipes are opposite.

[0007] Preferably, a first slider is provided on the inner wall of the peripheral side of the fixed cylinder, the first slider is arranged along the length direction of the fixed cylinder, a first slide groove is opened on the floating plate, the first slider is located in the first slide groove, and a blocking device for preventing the floating plate from falling is provided at the bottom end of the fixed cylinder.

[0008] Preferably, the blocking device comprises a connecting tube and a blocking ring plate, the blocking ring plate is fixed at the bottom of the connecting tube, and the diameter of the floating plate is larger than the aperture of the blocking ring plate;

[0009] The inner wall of the connecting tube is provided with an internal thread, the outer wall of the bottom end of the fixing tube is provided with an external thread matching the internal thread, and the connecting tube is threadedly connected to the bottom end of the fixing tube.

[0010] Preferably, there are two first sliding blocks, which are symmetrically distributed; there are two first sliding grooves, which are symmetrically distributed; and the two first sliding blocks are respectively placed in the two first sliding grooves.

[0011] Preferably, the inner wall around the feed bin is provided with a plurality of protrusions, and the plurality of protrusions are arranged in an array.

[0012] Preferably, the feeding mechanism includes a feeding pipe, a feeding pump and a valve, a discharge port is provided at the bottom of the feed bin, the valve is arranged at the discharge port, the input end of the feeding pump is connected to the discharge port through a feeding pipe, and the output end of the feeding pump is connected to the input port of the microreactor through another feeding pipe.

[0013] Preferably, the proximity sensor is connected to the fixed cylinder through a distance adjustment mechanism, and the distance adjustment mechanism includes a mounting bracket, a fixed seat driving motor and a screw, the fixed seat is fixedly connected to the fixed cylinder, and second slide grooves are provided on both sides of the fixed seat. Second sliders are fixed on both sides of the mounting bracket, and the two second sliders are respectively slidably set in the two second slide grooves. A threaded hole is provided on the mounting bracket, and the screw is rotatably installed on the top of the fixed seat. The screw is threadedly connected to the threaded hole, and the proximity sensor is fixed on the mounting bracket.

[0014] The utility model has the following beneficial effects: the utility model is provided with a material quantity control mechanism, and the detection distance of the proximity sensor is preset according to the cross-sectional area of ​​the feed bin. With the injection of the material, the material level in the feed bin rises, pushing the floating plate upward, and when the contact rod on the floating plate reaches the preset detection range of the proximity sensor, the proximity sensor detects the arrival of the contact rod, outputs a signal to the feed pump, and the feed pump stops working. At this time, the material in the feed bin is the required feed amount, and then the material in the feed bin is all transported to the microreactor through the feeding mechanism. The material quantity control mechanism of the utility model is less affected by the state of the feed pump. Compared with the traditional method of determining the feed amount by only changing the parameters of the feed pump, the utility model can better ensure the accuracy of the feed amount. At the same time, the feed pipe of the utility model is tangent to the feed bin, and a vortex will be formed after the material enters the feed bin, and the material is further mixed to ensure that the material is fully mixed. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the three-dimensional structure of the feed bin of the utility model;

[0017] Figure 3 This is a schematic diagram of the internal structure of the feed bin of the utility model;

[0018] Figure 4 This is a schematic diagram of the exploded structure of the feed bin and the material quantity control mechanism of the utility model;

[0019] Figure 5 for Figure 4 Enlarged view of point A in the middle.

[0020] Numbers in the figure: 1. feed bin; 2. feed pipe; 3. microreactor; 4. contact rod; 5. blocking device; 51. connecting cylinder; 52. blocking ring plate; 6. floating plate; 61. first slide groove; 7. fixed cylinder; 71. first slider; 8. fixed seat; 81. second slide groove; 9. mounting bracket; 10. proximity sensor; 11. screw; 12. drive motor; 13. discharge port; 14. bump; 15. valve; 16. feed pipe; 17. delivery pump. DETAILED DESCRIPTION

[0021] In order to make the present invention clearer and more understandable, the technical solution of the present invention is further described in detail below in combination with the accompanying drawings and embodiments. It should be understood that the given embodiment is only one of the implementation methods and does not represent all embodiments.

[0022] In this article, the terms "upper, lower, inside, outside" and the like are established based on the positional relationships shown in the drawings. Depending on the different drawings, the corresponding positional relationships may also change accordingly. Therefore, they cannot be understood as absolute limitations on the scope of protection.

[0023] Combined with Figure 1 -Attached Figure 5 A microreactor feeding device comprises a feeding bin 1, a feed amount control mechanism and a microreactor 3, wherein a feeding pipe 2 is provided on the top of the feeding bin 1, the feeding pipe 2 is communicated with the feeding bin 1 and is tangent to the outer wall of the feeding bin 1, there are two feeding pipes 2, the two feeding pipes 2 are respectively arranged on both sides of a fixed cylinder 7, the feeding directions of the two feeding pipes 2 are opposite, that is, the conveying directions of the materials in the two feeding pipes 2 are opposite during feeding; the materials enter the feeding bin 1 from the two feeding pipes 2, a vortex is formed in the feeding bin 1, and the materials are further mixed; a feeding pump for feeding is connected to one end of the feeding pipe 2 away from the feeding bin 1, and the feeding bin 1 is connected to the microreactor 3 through a feeding mechanism;

[0024] The material quantity control mechanism includes a fixed cylinder 7 and a floating plate 6. The top of the fixed cylinder 7 is fixedly connected to the inner wall of the top of the feed bin 1. The bottom of the fixed cylinder 7 is open. The floating plate 6 is slidably connected in the fixed cylinder 7. A contact rod 4 is fixed to the top of the floating plate 6. A proximity sensor 10 is fixed to the inner wall of the top of the fixed cylinder 7. The proximity sensor 10 corresponds to the position of the contact rod 4 so as to sense the position of the contact rod 4. The contact rod 4 is a metal rod. The proximity sensor 10 is electrically connected to the feed pump. When feeding, the feed pump starts to pump materials into the feed bin 1 through the feed pipe 2. The floating plate 6 will float on the material liquid surface. As the material in the feed bin 1 increases, the material liquid surface rises, and the floating plate 6 also rises accordingly, thereby driving the contact rod 4 to approach the proximity sensor 10. When the contact rod 4 reaches the detection range of the proximity sensor 10, it means that the material quantity in the feed bin 1 meets the demand. The proximity sensor 10 outputs a signal to the feed pump, and the feed pump stops feeding. Then, all the materials in the feed bin 1 are transported into the microreactor 3 through the feeding mechanism. The detection range of the proximity sensor 10 is preset according to the required feed amount and the cross-sectional area of ​​the feed bin 1. The detection range of the proximity sensor 10 determines the height of the material entering the feed bin 1. The feed amount can be determined according to the height of the material and the cross-sectional area of ​​the feed bin 1.

[0025] Specifically, a first slider 71 is provided on the inner wall of the peripheral side of the fixed cylinder 7, and the first slider 71 is arranged along the length direction of the fixed cylinder 7. A first slide groove 61 is opened on the floating plate 6, and the first slider 71 is located in the first slide groove 61. The floating plate 6 is slidably arranged in the fixed cylinder 7 through the cooperation of the first slide groove 61 and the first slider 71. More specifically, there are two first sliders 71, and the two first sliders 71 are symmetrically distributed. There are two first slide grooves 61, and the two first slide grooves 61 are symmetrically distributed. The two first sliders 71 are respectively placed in the two first slide grooves 61 to ensure sliding. Stability; a blocking device 5 for preventing the floating plate 6 from falling is provided at the bottom of the fixed cylinder 7, and the blocking device 5 includes a connecting cylinder 51 and a blocking ring plate 52, and the blocking ring plate 52 is fixed at the bottom of the connecting cylinder 51, and the diameter of the floating plate 6 is larger than the aperture of the blocking ring plate 52; an internal thread is provided on the inner wall of the connecting cylinder 51, and an external thread matching the internal thread is provided on the outer wall of the bottom end of the fixed cylinder 7, and the connecting cylinder 51 is threadedly connected to the bottom end of the fixed cylinder 7, and the threaded connection between the connecting cylinder 51 and the fixed cylinder 7 facilitates the disassembly and installation of the blocking device 5, thereby facilitating the maintenance or replacement of the floating plate 6 and the contact rod 4.

[0026] Specifically, the inner wall around the feed bin 1 is provided with a plurality of protrusions 14, and the plurality of protrusions 14 are arranged in an array. When the material enters the feed bin 1 from the feed pipe 2, it will impact on the side wall of the feed bin 1. When the flowing material impacts on the protrusions 14, the protrusions 14 are equivalent to stirring the material, so that the material is further mixed to ensure that the material is fully mixed.

[0027] Specifically, the feeding mechanism includes a feeding pipe 16, a feeding pump 17 and a valve 15. The bottom of the feed bin 1 is provided with a discharge port 13, the valve 15 is arranged at the discharge port 13, the input end of the feeding pump 17 is connected to the discharge port 13 through a feeding pipe 16, and the output end of the feeding pump 17 is connected to the input port of the microreactor 3 through another feeding pipe 16. When the material in the feed bin 1 reaches the feed amount, the valve 15 and the feeding pump 17 are opened, and the feeding pump 17 pumps the material in the feed bin 1 into the microreactor 3 for reaction.

[0028] Specifically, the proximity sensor 10 is connected to the fixed cylinder 7 through a distance adjustment mechanism, and the distance adjustment mechanism includes a mounting frame 9, a fixed seat 8, a driving motor 12 and a screw 11. The fixed seat 8 is fixedly connected to the fixed cylinder 7, and second slide grooves 81 are provided on both sides of the fixed seat 8. Second sliders are fixed on both sides of the mounting frame 9, and two second sliders are respectively slidably set in two second slide grooves 81. The mounting frame 9 is provided with threaded holes, and the screw 11 is rotatably mounted on the top of the fixed seat 8. The screw 11 is threadedly connected in the threaded hole. The proximity sensor 10 is fixed on the mounting frame 9, and the output end of the driving motor 12 is connected to the screw 11. When the detection range to be set exceeds the range that the proximity sensor 10 itself can detect, the distance between the proximity sensor 10 and the contact rod 4 can be adjusted by the distance adjustment mechanism, thereby improving the flexibility of setting the feed amount. When adjustment is required, the drive motor 12 is started, and the drive motor 12 drives the screw 11 to rotate. Since the screw 11 is threadedly connected to the threaded hole on the mounting frame 9, and the mounting frame 9 is radially restricted by the second slide groove 81, the mounting frame 9 will move up and down along the screw 11 and the second slide groove 81, thereby realizing distance adjustment.

[0029] More specifically, in order to facilitate maintenance of the material quantity control mechanism, the top of the feed bin 1 may be provided as a detachable cover structure, and the fixing cylinder 7 and the driving motor 12 are fixed on the cover structure.

[0030] Although embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A microreactor feeding device, characterized in that: The invention comprises a feed bin (1), a material quantity control mechanism and a microreactor (3), wherein a feed pipe (2) is provided on the top of the feed bin (1), the feed pipe (2) is in communication with the feed bin (1) and is tangent to the outer wall of the feed bin (1), and an end of the feed pipe (2) away from the feed bin (1) is connected to a feed pump for feeding, and the feed bin (1) is connected to the microreactor (3) via the material delivery mechanism; The material quantity control mechanism comprises a fixed cylinder (7) and a floating plate (6); the top end of the fixed cylinder (7) is fixedly connected to the top inner wall of the feed bin (1); the bottom end of the fixed cylinder (7) is open; the floating plate (6) is slidably connected in the fixed cylinder (7); a contact rod (4) is fixed to the top end of the floating plate (6); a proximity sensor (10) is fixed to the top inner wall of the fixed cylinder (7); the proximity sensor (10) corresponds to the position of the contact rod (4); and the proximity sensor (10) is electrically connected to the feed pump.

2. The microreactor feeding device according to claim 1, characterized in that: There are two feed pipes (2), which are respectively arranged on two sides of the fixed cylinder (7), and the feeding directions of the two feed pipes (2) are opposite.

3. The microreactor feeding device according to claim 1, characterized in that: A first sliding block (71) is provided on the inner wall of the peripheral side of the fixed cylinder (7), and the first sliding block (71) is arranged along the length direction of the fixed cylinder (7). A first sliding groove (61) is provided on the floating plate (6), and the first sliding block (71) is located in the first sliding groove (61). A blocking device (5) for preventing the floating plate (6) from falling is provided at the bottom end of the fixed cylinder (7).

4. The microreactor feeding device according to claim 3, characterized in that: The blocking device (5) comprises a connecting tube (51) and a blocking ring plate (52), wherein the blocking ring plate (52) is fixed to the bottom of the connecting tube (51), and the diameter of the floating plate (6) is larger than the aperture of the blocking ring plate (52); The inner wall of the connecting tube (51) is provided with an internal thread, the outer wall of the bottom end of the fixing tube (7) is provided with an external thread matching the internal thread, and the connecting tube (51) is threadedly connected to the bottom end of the fixing tube (7).

5. The microreactor feeding device according to claim 3, characterized in that: There are two first sliding blocks (71), the two first sliding blocks (71) are symmetrically distributed, there are two first sliding grooves (61), the two first sliding grooves (61) are symmetrically distributed, and the two first sliding blocks (71) are respectively placed in the two first sliding grooves (61).

6. The microreactor feeding device according to claim 1, characterized in that: The inner wall of the peripheral side of the feed bin (1) is provided with a plurality of protrusions (14), and the plurality of protrusions (14) are arranged in an array.

7. The microreactor feeding device according to claim 1, characterized in that: The feeding mechanism comprises a feeding pipe (16), a feeding pump (17) and a valve (15); a discharge port (13) is provided at the bottom of the feeding bin (1); the valve (15) is arranged at the discharge port (13); an input end of the feeding pump (17) is connected to the discharge port (13) via a feeding pipe (16); and an output end of the feeding pump (17) is connected to an input port of the microreactor (3) via another feeding pipe (16).

8. The microreactor feeding device according to claim 1, characterized in that: The proximity sensor (10) is connected to the fixed cylinder (7) through a distance adjustment mechanism. The distance adjustment mechanism comprises a mounting frame (9), a fixed seat (8), a drive motor (12) and a screw (11). The fixed seat (8) is fixedly connected to the fixed cylinder (7). Second slide grooves (81) are provided on both sides of the fixed seat (8). Second sliders are fixed on both sides of the mounting frame (9). The two second sliders are respectively slidably arranged in the two second slide grooves (81). The mounting frame (9) is provided with a threaded hole. The screw (11) is rotatably mounted on the top of the fixed seat (8). The screw (11) is threadedly connected to the threaded hole. The proximity sensor (10) is fixed on the mounting frame (9). The output end of the drive motor (12) is connected to the screw (11).

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