Micro-channel reactor capable of adjusting length of reaction channel

Abstract

The invention 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 the adjacent reaction units are connected through a connecting pipe. 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 microchannel reactor disclosed by the invention, the length of the reaction channel can be adjusted according to specific reaction conditions, the application range of the microchannel reactor is enlarged, the flexibility is improved, and the microchannel reactor has stirring, reaction condition prompting and heating functions.

Description

Technical Field

[0001] The invention relates to the field of microchannel reactors, in particular to a microchannel reactor with adjustable reaction channel length. Background Art

[0002] Microchannel reactors have been widely used in chemical synthesis, pharmaceuticals, fine chemicals, environmental protection and other fields due to their high mass transfer and heat transfer efficiency, precise reaction condition control, high safety and scalability. Existing microchannel reactors obtain the desired product by passing reactants into microchannels for mixed reaction. However, due to the fixed length of the channel, it is difficult to meet the requirements of the reactants for reaction time under different reaction conditions by controlling the flow rate during use. Some materials are discharged before they are fully reacted, which affects the reaction effect and limits its scope of application and flexibility. At the same time, due to the narrow channel of the microchannel reactor, the material is prone to blockage. Once the blockage occurs, if it does not occur in time, it is easy to cause danger in some exothermic reaction processes. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a microchannel reactor with adjustable reaction channel length, so as to adjust the length of the reaction channel according to the specific reaction conditions, increase its application range and improve flexibility.

[0004] To achieve the above object, the technical solution of the present invention is as follows:

[0005] A microchannel reactor with adjustable reaction channel length comprises a base frame, wherein a fixed frame and a movable frame are arranged on the front and rear sides of the base frame, a plurality of reaction units arranged in a plane cross shape are installed between the fixed frame and the movable frame, adjacent reaction units are connected by connecting pipes, each reaction unit comprises a reaction tube arranged in a longitudinal cross shape, and the reaction tube is formed by sliding and plugging a plurality of sections of Z-shaped tubes; the first Z-shaped tube and the second Z-shaped tube of the first reaction unit are respectively connected to a feed tube 1 and a feed tube 2, and the end of the last Z-shaped tube of the last reaction unit is connected to a discharge tube; the first Z-shaped tube of each reaction unit is fixed on the fixed frame, and the last Z-shaped tube is fixed on the movable frame; the movable frame can move forward and backward along the base frame.

[0006] In the above scheme, a stirring mechanism is arranged in the vertical section of the Z-shaped tube, and the stirring mechanism includes a fixed impeller, a rotating impeller, a connecting shaft and a scraper. The fixed impeller includes two groups, which are respectively located at the upper and lower parts of the Z-shaped tube, and each group includes a first fixed impeller and a second fixed impeller. The fixed impeller is fixedly connected to the inner wall of the Z-shaped tube; the rotating impeller includes two, which are respectively located between the first fixed impeller and the second fixed impeller; both 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, and the rotating impeller is fixed on the connecting shaft; the scraper is installed on the connecting shaft and is located between the two first fixed impellers.

[0007] In the above scheme, an accommodating cavity is set in the middle part of the connecting tube, and a prompt mechanism is installed in the accommodating cavity. The prompt mechanism includes a rotating gear, a guide knocking column, a first spring and a prompt bell. The rotating gear is installed in the connecting tube through the central axis, the guide knocking column is horizontally installed on the central axis, the first spring is sleeved on the guide knocking column, and the two ends of the first spring are respectively against the end of the guide knocking column and the central axis. The prompt bell is installed on the inner side of the accommodating cavity and can collide with the guide knocking column.

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

[0009] In a further technical solution, a locking mechanism is also provided on the base frame, and the locking mechanism includes two fixed plates, a locking column and a second spring. Several locking grooves are arranged circumferentially on the handle. A gripping block is provided at one end of the locking column, and the other end passes through the two fixed plates, and the end is embedded in the slot of the handle.

[0010] In the above solution, a heating plate is arranged in the middle of the base frame, and a plurality of heating wires are arranged on the heating plate.

[0011] In the above scheme, the first bracket and the second bracket are respectively arranged on the left and right sides of the base frame, the feed pipe one and the feed pipe two are arranged on the first bracket, and the discharge pipe is arranged on the second bracket. The first flow meter and the second flow meter are respectively installed on the feed pipe one and the feed pipe two, and the third flow meter is installed on the discharge pipe.

[0012] In the above solution, the connecting pipes between adjacent reaction units are located on the base frame.

[0013] In the above solution, a non-slip bottom plate is provided at the bottom of the legs of the base frame.

[0014] Through the above technical solution, the microchannel reactor with adjustable reaction channel length provided by the present invention has the following beneficial effects: 1. According to the reaction requirements of the reactants, the present invention can grasp the handle, rotate the screw rod, move the movable frame, and expand or contract the Z-shaped tube to adjust the length of the reaction channel to meet the reaction requirements of different reactants; 2. The present invention monitors the flow of the reactants by the first flow meter and the second flow meter. After the reactants are discharged after the reaction, the third flow meter monitors the flow of the reactants after the reaction, thereby achieving the effect of being able to monitor the flow of the reactants in real time, so as to improve the reaction control accuracy; 3. After the reactants flow into the Z-shaped tube, the present invention drives the rotating impeller to rotate, driving the connecting shaft and the scraper to rotate, thereby achieving the effect of stirring the reactants and cleaning the inner wall of the Z-shaped tube. The stirring mechanism of the present invention has a simple structure and a small volume, and is suitable for use in narrow microchannels; 4. When the reactant flows into the connecting pipe, the rotating gear is driven to rotate, so that the guide knocking column rotates to knock the prompt bell, so that the prompt bell rings. The flow of the reactant can be prompted according to the sound of the prompt bell, so as to timely find the blockage of the reactant; 5. When the reactants react, the heating wire on the heating plate heats the Z-shaped tube and the connecting tube, thereby achieving the purpose of heating the reactants to meet the requirements of the reactants reacting at a certain temperature; 6. The present invention is provided with a locking mechanism. When the locking column is pulled backward to disengage from the handle, the second spring is squeezed and contracted. When the handle stops rotating, the locking column is released and the second spring rebounds, so that the locking column is reset and re-engaged with the handle, thereby achieving the effect of locking the handle and avoiding accidental touch that causes the handle to rotate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0016] Figure 1 A schematic diagram of a microchannel reactor with adjustable reaction channel length disclosed in an embodiment of the present invention; Figure 2 It is a schematic diagram of the structure of the base frame and the fixed frame; Figure 3 It is a schematic diagram of the connection part of adjacent Z-shaped tubes; Figure 4 Schematic diagram of the locking mechanism; Figure 5 is a schematic diagram of the stirring mechanism; Figure 6 It is an enlarged schematic diagram of the stirring mechanism; Figure 7 It is a schematic diagram of the prompt mechanism; Figure 8 Schematic diagram of the heating wire.

[0017] In the figure, 1, base frame; 2, anti-slip base plate; 3, fixed frame; 4, movable frame; 5, connecting pipe; 6, Z-shaped pipe; 7, feed pipe 1; 8, feed pipe 2; 9, discharge pipe; 10, first bracket; 11, second bracket; 12, first flow meter; 13, second flow meter; 14, third flow meter; 15, fixing rod; 16, screw rod; 17, handle; 18, fixing plate; 19, positioning column; 20, second spring; 21, slot; 22, gripping block; 23, first fixed impeller; 24, second fixed impeller; 25, rotating impeller; 26, connecting shaft; 27, scraper; 28, accommodating chamber; 29, rotating gear; 30, guide knocking column; 31, first spring; 32, reminder bell; 33, center axis; 34, heating plate; 35, heating wire. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0019] The present invention provides a microchannel reactor with adjustable reaction channel length, such as Figure 1 and Figure 2 As shown, it includes a base frame 1, and the bottom of the legs of the base frame 1 is provided with a non-slip bottom plate 2, which is convenient for stable placement on the ground. The base frame 1 is provided with a fixed frame 3 and a movable frame 4 on the front and rear sides, and a plurality of reaction units arranged in a plane cross shape are installed between the fixed frame 3 and the movable frame 4, and adjacent reaction units are connected by a connecting pipe 5 located on the base frame 1.

[0020] In this embodiment, 7 reaction units are formed by connecting 6 connecting tubes 5. Each reaction unit includes reaction tubes arranged in a vertical cross shape, such as Figure 3 As shown, the reaction tube is formed by sliding and plugging several sections of Z-shaped tubes 6, and the plugging parts are sealed and connected, and rubber sliding pads can be set to prevent leakage.

[0021] The first Z-shaped tube 6 and the second Z-shaped tube 6 of the first reaction unit on the left side of the base frame 1 are connected to the feed pipe 1 7 and the feed pipe 2 8 at their lower parts, respectively, and the end of the last Z-shaped tube 6 of the last reaction unit is connected to the discharge pipe 9. The first bracket 10 and the second bracket 11 are respectively arranged on the left and right sides of the base frame 1, the feed pipe 1 7 and the feed pipe 2 8 are arranged on the first bracket 10, and the discharge pipe 9 is arranged on the second bracket 11, and the first bracket 10 and the second bracket 11 play a supporting role. The first flow meter 12 and the second flow meter 13 are respectively installed on the feed pipe 1 7 and the feed pipe 2 8, and the third flow meter 14 is installed on the discharge pipe 9.

[0022] When using the present invention, the base frame 1 is first placed in the use area, and then the two reactants to be reacted are respectively introduced into the Z-shaped tube 6 through the feed pipe 1 7 and the feed pipe 2 8, so that the two reactants flow through each Z-shaped tube 6, and then flow through each reaction unit through the connecting pipe 5, and perform a mixed reaction during the flow process, and finally the obtained product is discharged from the discharge 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, so as to improve the reaction control accuracy.

[0023] The first Z-shaped tube 6 of each reaction unit is fixed on the fixed frame 3, and the last Z-shaped tube 6 is fixed on the movable frame 4; the movable frame 4 can move forward and backward along the bottom frame 1. When the movable frame 4 moves forward or backward on the bottom frame 1, the Z-shaped tube 6 can be pulled to move, so that the horizontal sections of adjacent Z-shaped tubes 6 are displaced, so that the length of the reaction channel can be adjusted.

[0024] Specifically, Figure 1 As shown, the installation method of the movable frame 4 is as follows: a fixed rod 15 and a screw rod 16 are respectively arranged on the left and right sides of the rear side of the base frame 1, the bottom of the movable frame 4 is respectively connected to the fixed rod 15 and the screw rod 16, and a handle 17 is arranged at the end of the screw rod 16. By rotating the handle 17, the movable frame 4 can slide on the fixed rod 15 and the screw rod 16.

[0025] like Figure 4 As shown, the base frame 1 is also provided with a locking mechanism, which includes two fixed plates 18, a locking column 19 and a second spring 20. A plurality of locking grooves 21 are arranged circumferentially on the handle 17. A gripping block 22 is provided at one end of the locking column 19, and the other end passes through the two fixed plates 18, and the end is embedded in the locking groove 21 of the handle 17. The locking mechanism of the device can be used to lock the handle 17. When the handle 17 needs to be rotated, the locking column 19 is pulled backward by the gripping block 22 to be separated from the handle 17, and the second spring 20 is squeezed and contracted. At this time, the handle 17 can be rotated. When the handle 17 stops rotating, the locking column 19 is released, and the second spring 20 rebounds, so that the locking column 19 is reset and re-engaged with the handle 17, thereby playing the role of being able to lock the handle 17 and avoiding the handle 17 from rotating due to accidental touch.

[0026] like Figure 5 and Figure 6As shown, a stirring mechanism is provided in the vertical section of the Z-shaped tube 6, and the stirring mechanism includes a fixed impeller, a rotating impeller 25, a connecting shaft 26 and a scraper 27. The fixed impeller includes two groups, which are respectively located at the upper and lower parts of the Z-shaped tube 6, and each group includes a first fixed impeller 23 and a second fixed impeller 24. The fixed impeller is fixedly connected to the inner wall of the Z-shaped tube 6, and the fixed impeller is stationary, which can guide the reactants. There are two rotating impellers 25, which are respectively located between the first fixed impeller 23 and the second fixed impeller 24; the two ends of the connecting shaft 26 pass through the two first fixed impellers 23, and the end is connected to the second fixed impeller 24 through a bearing, and the rotating impeller 25 is fixed on the connecting shaft 26; the scraper 27 is installed on the connecting shaft 26, and is located between the two first fixed impellers 23. When the reactants flow into the Z-tube 6 and pass through the fixed impeller, they can push the rotating impeller 25 to rotate, thereby driving the connecting shaft 26 and the scraper 27 thereon to rotate, thereby stirring the reactants and cleaning the inner wall of the Z-tube 6.

[0027] like Figure 7 As shown, an accommodating chamber 28 is provided in the middle part of the connecting tube 5, and a prompt mechanism is installed in the accommodating chamber 28. The prompt mechanism includes a rotating gear 29, a guide knocking column 30, a first spring 31 and a prompt bell 32. The rotating gear 29 is installed in the connecting tube 5 through a central axis 33. The guide knocking column 30 is horizontally installed on the central axis 33. The first spring 31 is sleeved on the guide knocking column 30. The two ends of the first spring 31 respectively abut against the end of the guide knocking column 30 and the central axis 33. The prompt bell 32 is installed on the inner side of the accommodating chamber 28 and can collide with the guide knocking column 30.

[0028] The prompt mechanism of the device can be used to prompt the flow of reactants. When the reactants flow into the connecting pipe 5, the rotating gear 29 is driven to rotate, so that the guide knocking column 30 rotates, thereby knocking the prompt bell 32, so that the prompt bell 32 rings, thereby prompting the flow of reactants, so as to timely find the blockage of reactants. After the guide knocking column 30 and the prompt bell 32 collide, the first spring 31 can play a buffering and resetting role.

[0029] like Figure 8 As shown, a heating plate 34 is arranged in the middle of the base frame 1, and a plurality of heating wires 35 are arranged on the heating plate 34, which can heat the connecting tube 5 between adjacent reaction units and the bottom of the Z-shaped tube 6 to meet the temperature requirements of the reactants.

[0030] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one 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 will not be limited to the embodiments shown herein, but rather to 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 invention comprises a base frame, wherein a fixed frame and a movable frame are arranged on the front and rear sides of the base frame, and a plurality of reaction units arranged in a plane cross shape are installed between the fixed frame and the movable frame, and adjacent reaction units are connected by connecting pipes, and each reaction unit comprises a reaction tube arranged in a longitudinal cross shape, and the reaction tube is formed by sliding and plugging a plurality of sections of Z-shaped tubes; the first Z-shaped tube and the second Z-shaped tube of the first reaction unit are respectively connected to a feed tube 1 and a feed tube 2, and the end of the last Z-shaped tube of the last reaction unit is connected to a discharge tube; the first Z-shaped tube of each reaction unit is fixed on the fixed frame, and the last Z-shaped tube is fixed on the movable frame; and the movable frame can move forward and backward along the base frame.

2. A microchannel reactor with adjustable reaction channel length according to claim 1, characterized in that: A stirring mechanism is arranged in the vertical section of the Z-shaped tube, and the stirring mechanism includes a fixed impeller, a rotating impeller, a connecting shaft and a scraper. The fixed impeller includes two groups, which are respectively located at the upper part and the lower part of the Z-shaped tube, and each group includes a first fixed impeller and a second fixed impeller. The fixed impeller is fixedly connected to the inner wall of the Z-shaped tube; the rotating impeller includes two, which are respectively located between the first fixed impeller and the second fixed impeller; both 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, and the rotating impeller is fixed on the connecting shaft; the scraper is installed on the connecting shaft and is located between the two first fixed impellers.

3. A microchannel reactor with adjustable reaction channel length according to claim 1, characterized in that: A accommodating cavity is set in the middle part of the connecting tube, and a prompt mechanism is installed in the accommodating cavity. The prompt mechanism includes a rotating gear, a guide knocking column, a first spring and a prompt bell. The rotating gear is installed in the connecting tube through the central axis, and the guide knocking column is horizontally installed on the central axis. The first spring is sleeved on the guide knocking column, and the two ends of the first spring respectively abut against the end of the guide knocking column and the central axis. The prompt bell is installed on the inner side of the accommodating cavity and can collide with the guide knocking column.

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

5. A microchannel reactor with adjustable reaction channel length according to claim 4, characterized in that: The base frame is also provided with a locking mechanism, which includes two fixed plates, a locking column and a second spring. Several locking grooves are arranged circumferentially on the handle. A gripping block is provided at one end of the locking column, and the other end passes through the two fixed plates, and the end is embedded in the locking groove of the handle.

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

7. A microchannel reactor with adjustable reaction channel length according to claim 1, characterized in that: The first bracket and the second bracket are respectively arranged on the left and right sides of the base frame, the feed pipe 1 and the feed pipe 2 are arranged on the first bracket, and the discharge pipe is arranged on the second bracket. The feed pipe 1 and the feed pipe 2 are respectively installed with a first flow meter and a second flow meter, and the discharge pipe is installed with a third flow meter.

8. The 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. The microchannel reactor with adjustable reaction channel length according to claim 1, characterized in that: The bottom of the legs of the base frame is provided with an anti-skid bottom plate.

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