Continuous flow micro-capacity dynamic tubular reactor

Abstract

The utility model relates to a tubular reactor, in particular to a continuous flow micro-capacity dynamic tubular reactor. A continuous flow micro-capacity dynamic tubular reactor comprises a tube body, a stirring assembly and a heat exchange assembly, the tube body is provided with an inner cavity, the inner cavity comprises a heat exchange channel and a reaction channel, and the reaction channel is located on the inner side of the heat exchange channel; the stirring assembly is arranged in the reaction channel; the stirring assembly comprises a driving motor, a stirring shaft and paddles; the stirring shaft is arranged in an inner cavity of the pipe body, a plurality of paddles are arranged on the stirring shaft in the axial direction, and the distances between the adjacent paddles are distributed on the stirring shaft from small to large; the stirring shaft is connected with the driving end of the driving motor; the heat exchange assembly comprises fins and a heat exchange pipe, the heat exchange pipe is connected to the outer side of the stirring shaft in a sleeving mode, and the multiple fins are arranged on the heat exchange pipe in the axial direction and evenly distributed on the heat exchange pipe.

Description

Technical Field

[0001] The utility model relates to a tubular reactor, in particular to a continuous flow micro-capacity dynamic tubular reactor. Background Art

[0002] Traditional tank reactors occupy a large floor space, have a small heat exchange area, are difficult to control reaction temperatures, and suffer from inconsistent material residence times. They are mostly used for reactions involving liquid phases, such as liquid-liquid, liquid-solid, gas-liquid, and gas-liquid-solid reactions. Mechanical seals are often used, which can easily cause leaks. Traditional tank reactors often cause uneven or incomplete reactions when reacting materials. Furthermore, highly exothermic reactions such as nitration and sulfonation can easily lead to heat accumulation, creating a dangerous situation. Utility Model Content

[0003] The utility model aims to provide a continuous flow micro-capacity dynamic tubular reactor, which solves the problem of uneven reaction or incomplete reaction in traditional reactors.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is:

[0005] A continuous flow micro-capacity dynamic tubular reactor comprising:

[0006] A tube body having an inner cavity including a heat exchange channel and a reaction channel, wherein the reaction channel is located inside the heat exchange channel;

[0007] A stirring assembly is placed in the reaction channel; the stirring assembly includes a drive motor, a stirring shaft, and blades; the centerline of the stirring shaft is collinear with the centerline of the reaction channel, and a plurality of blades are axially arranged on the stirring shaft, with the distance between adjacent blades increasing from small to large; the stirring shaft is connected to the drive end of the drive motor;

[0008] The heat exchange component includes fins and heat exchange tubes. The heat exchange tubes are sleeved on the outside of the stirring shaft. A plurality of fins are arranged on the heat exchange tubes along the axial direction. The fins are evenly distributed on the heat exchange tubes.

[0009] Furthermore, the heat exchange channel is the interval between the outer wall of the heat exchange tube and the inner wall of the tube body, and the reaction channel is the internal interval of the heat exchange tube.

[0010] Furthermore, fixing parts are respectively provided on both sides of the tube body, the middle part of the fixing part is connected to the stirring shaft through a bearing, and the outer side of the fixing part is connected to the stirring shaft through an outer spacer.

[0011] Furthermore, a sealing member is provided on the fixing member, and the sealing member is made of polytetrafluoroethylene.

[0012] Furthermore, thermal resistors for monitoring the reaction temperature are respectively provided on both sides of the tube body, and sensing ends of the thermal resistors are inserted into the heat exchange channel for monitoring and adjusting the temperature.

[0013] Furthermore, the blades are distributed on the stirring shaft in a spiral shape.

[0014] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0015] The utility model is provided with blades on the stirring shaft, and the distance between adjacent blades is increased from small to large. This will cause the rotation of the stirring shaft to drive the rotation of the reactants in the reaction channel to form turbulence, which can intensify the reaction and mixing of the materials, improve the heat exchange efficiency, and accurately control the temperature through the thermal resistor. Bearings are provided on both sides of the device, which can enable the device to operate more smoothly after being fixed. In terms of highly exothermic reactions such as nitration and sulfonation, the utility model can effectively avoid heat accumulation by enhancing the heat transfer performance of the blades, ensuring the safety of the reaction. The utility model saves space, reduces costs, and reduces leakage by adding shaft seals instead of mechanical seals. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of a continuous flow micro-volume dynamic tubular reactor.

[0017] Figure 2 This is a cross-sectional diagram of a continuous flow micro-volume dynamic tubular reactor.

[0018] Figure 3 Schematic diagram of the connection between the paddle and the stirring shaft. DETAILED DESCRIPTION

[0019] like Figures 1 to 3 As shown, a continuous flow micro-capacity dynamic tubular reactor includes: a tube body 1, a stirring assembly and a heat exchange assembly. The tube body 1 has an inner cavity, which includes a heat exchange channel 2 and a reaction channel 3. The reaction channel 3 is located inside the heat exchange channel 2; the heat exchange channel 2 is the interval between the outer wall of the heat exchange tube 22 and the inner wall of the tube body 1, and the reaction channel 3 is the internal interval of the heat exchange tube 22; the reactant is placed in the reaction channel 3 through the feed port. The reaction channel 3 of this device has a small liquid holding capacity, so the reaction is uniform, and the temperature can also be accurately controlled. It is suitable for gas phase, liquid phase and solid phase reactions, and can also be used for low-cost laboratory research on continuous flow reactions.

[0020] The stirring assembly is arranged in the reaction channel 3; the stirring assembly comprises a driving motor, a stirring shaft 11 and paddles 12; the center line of the stirring shaft 11 is collinear with the center line of the reaction channel 3, a plurality of paddles 12 are arranged on the stirring shaft 11 in the axial direction, the distance between adjacent paddles 12 gradually increases from small to large, which prevents the accumulation of materials from causing excessive local temperature rise in the reaction channel 3 and causing danger; the stirring shaft 11 is connected with the driving end of the driving motor; the paddles 12 are arranged in a spiral shape on the stirring shaft 11; after the reactants are arranged in the reaction channel 3, the driving motor drives the stirring shaft 11 to rotate, the stirring shaft 11 drives the paddles 12 to rotate, the rotation of the paddles 12 drives the reactants to form turbulent flow, intensifies the reaction and mixing of the materials, and improves the heat exchange efficiency. The rotation speed of the stirring shaft 11 can also be controlled by controlling the rotation speed of the driving motor to adapt to different reactants.

[0021] The heat exchange assembly comprises fins 21 and heat exchange pipes 22, the heat exchange pipes 22 are sleeved outside the stirring shaft 11, a plurality of fins 21 are arranged on the heat exchange pipes 22 in the axial direction, and the fins 21 are uniformly distributed on the heat exchange pipes 22. The heat exchange medium is arranged in the heat exchange channel 2 to flush and exchange heat with the reaction channel 3, both sides of the pipe body 1 are respectively provided with thermal resistors 23 for monitoring the reaction temperature, the sensing end of the thermal resistor 23 is inserted into the heat exchange channel 2, and the reaction temperature is monitored and adjusted. The temperature change can be monitored at any time through the thermal resistor 23, which is beneficial to the safe performance of the reaction.

[0022] Both sides of the pipe body 1 are respectively provided with fixing members 31, the middle part of the fixing member 31 is connected to the stirring shaft through a bearing 32, and the bearing 32 is used for supporting both sides of the pipe body, which can ensure that the operation of the equipment is more stable. The outer side of the fixing member 31 is connected to the stirring shaft 11 through an outer spacer 33. The outer spacer 33 is used for isolating dust from the outside, prolonging the service life of the component. The fixing member 31 is provided with a sealing member 34 made of polytetrafluoroethylene. It has good chemical corrosion resistance and self-lubrication, thereby prolonging the service life.

[0023] Work flow:

[0024] First, the two ends of the pipe body 1 are clamped to fix the pipe body 1, then the reactant is directly added to the reaction channel 3 through the charging port, then the driving motor drives the stirring shaft 11 to rotate, the paddles 12 on the stirring shaft 11 drive the reactant to form turbulent flow, so that the reactant fully reacts in the reaction channel 3, and the reaction is more uniform. During the rotation of the stirring shaft 11, the bearings 32 at both ends of the pipe body 1 reduce the friction between the stirring shaft 11 and the pipe body 1, so that the reaction channel 3 is more stable. Then the heat exchange medium is added to the heat exchange channel, and the temperature is monitored and controlled through the thermal resistor 32 to prevent danger.

[0025] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the scope of protection of the present invention.

Claims

1. A continuous flow micro-capacity dynamic tubular reactor, characterized in that: include: A tube body having an inner cavity including a heat exchange channel and a reaction channel, wherein the reaction channel is located inside the heat exchange channel; A stirring assembly is placed in the reaction channel; the stirring assembly includes a drive motor, a stirring shaft, and blades; the centerline of the stirring shaft is collinear with the centerline of the reaction channel, and a plurality of blades are axially arranged on the stirring shaft, with the distance between adjacent blades increasing from small to large; the stirring shaft is connected to the drive end of the drive motor; The heat exchange component includes fins and heat exchange tubes. The heat exchange tubes are sleeved on the outside of the stirring shaft. A plurality of fins are arranged on the heat exchange tubes along the axial direction. The fins are evenly distributed on the heat exchange tubes.

2. A continuous flow micro-volume dynamic tubular reactor according to claim 1, characterized in that: The heat exchange channel is the area between the outer wall of the heat exchange tube and the inner wall of the tube body, and the reaction channel is the area inside the heat exchange tube.

3. A continuous flow micro-volume dynamic tubular reactor according to claim 1, characterized in that: Both sides of the tube body are provided with fixing parts respectively. The middle part of the fixing part is connected to the stirring shaft through a bearing, and the outer side of the fixing part is connected to the stirring shaft through an outer spacer.

4. A continuous flow micro-volume dynamic tubular reactor according to claim 3, characterized in that: A sealing member is provided on the fixing member, and the sealing member is made of polytetrafluoroethylene.

5. A continuous flow micro-volume dynamic tubular reactor according to claim 1, characterized in that: Thermal resistors for monitoring the reaction temperature are respectively provided on both sides of the tube body, and the sensing ends of the thermal resistors are inserted into the heat exchange channel for monitoring and adjusting the temperature.

6. A continuous flow micro-volume dynamic tubular reactor according to claim 1, characterized in that: The blades are distributed on the stirring shaft in a spiral shape.

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