Active Mixing Continuous Flow Reactors and Reaction Systems

Abstract

The present invention discloses an active mixing continuous flow reactor and a reaction system, wherein the active mixing continuous flow reactor comprises a reaction tube, a dispersing member and a driving device, the reaction tube is provided with a reactant chamber for accommodating reactants, the dispersing member is arranged in the reactant chamber, the dispersing member extends along the axial direction of the reaction tube, and divides the reactant chamber into a plurality of accommodating spaces, each accommodating space extends along the axial direction of the reaction tube, the dispersing member is provided with a port for reactants to transfer between two adjacent accommodating spaces, and the driving assembly is connected to the reaction tube and / or the dispersing member to drive the reaction tube and / or the dispersing member to reciprocate along the radial direction of the reaction tube. The technical solution of the present invention solves the problem that the mass transfer effect of the current tubular reactor is poor, resulting in low production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of reaction devices, in particular to an active mixing continuous flow reactor and a reaction system. Background Art

[0002] The tubular reactor is a plug flow reactor. The reactants in the tube are mixed by free diffusion. In order to achieve process scale-up and increase output at a lower cost, the tube diameter is usually increased. However, when the tube diameter increases, it is very difficult to disperse the solid particles and bubbles in the multiphase reaction in the liquid. The mixing performance in the tube will be greatly reduced, resulting in very poor multiphase mixing effect, that is, poor mass transfer effect, which leads to low production efficiency. Summary of the invention

[0003] The main purpose of the present invention is to provide an active mixing continuous flow reactor, aiming to solve the problem that the mass transfer effect of the current tubular reactor is poor, resulting in low production efficiency.

[0004] To achieve the above object, the active mixing continuous flow reactor proposed in the present invention comprises:

[0005] A reaction tube is provided with a reactant chamber, wherein the reactant chamber is used to accommodate reactants;

[0006] a dispersing member, which is disposed in the reactant chamber and extends along the axial direction of the reaction tube to divide the reactant chamber into a plurality of accommodation spaces, each of which extends along the axial direction of the reaction tube, and the dispersing member is provided with a port for transferring reactants between two adjacent accommodation spaces; and

[0007] The driving device is connected to the reaction tube and / or the dispersing member, and is used for driving the reaction tube and / or the dispersing member to reciprocate along the radial direction of the reaction tube.

[0008] In one embodiment, the dispersing member is a partition plate disposed in the reactant chamber.

[0009] In one embodiment, a plurality of the partition plates are provided, and the plurality of the partition plates are arranged at intervals along the radial direction of the reaction tube.

[0010] In one embodiment, the dispersion element is arranged in a curved shape.

[0011] In one embodiment, the dispersing member is a cylinder disposed in the reactant chamber.

[0012] In one embodiment, the plurality of the passages are provided, and the plurality of the passages are arranged at intervals along the length direction of the cylinder, and / or the plurality of the passages are arranged at intervals along the circumference direction of the cylinder.

[0013] In one embodiment, the cylinder is used to contain solids.

[0014] In one embodiment, the dispersion element is arranged in a spiral shape.

[0015] In one embodiment, a gas permeable tube is provided in the reactant chamber, and the gas permeable tube is used to accommodate gaseous reactants.

[0016] The present invention also proposes a reaction system, characterized in that it includes the active mixing continuous flow reactor as described above, wherein one or more active mixing continuous flow reactors are provided, and the multiple active mixing continuous flow reactors are arranged in series or in parallel.

[0017] The technical solution of the present invention adopts the method of setting a reactant chamber on a reaction tube, and the reactant can move along the axial direction of the reaction tube after entering the reactant chamber; and setting a dispersion piece in the reactant chamber, using the dispersion piece to divide the reactant chamber into a plurality of accommodation spaces extending along the axial direction of the reaction tube, and setting a port for the reactant to transfer between two adjacent accommodation spaces on the dispersion piece; and a driving device is connected to the reaction tube and / or the dispersion piece, when the driving device drives the reaction tube and / or the dispersion piece to reciprocate along the radial direction of the reaction tube, the reaction tube and the dispersion piece reciprocate along the radial direction of the reaction tube together, or the dispersion piece reciprocates along the radial direction of the reaction tube in the reaction tube, so that the reactant in the reactant chamber moves relative to the dispersion piece under the action of gravity and inertia, and moves in each accommodation space, or transfers between adjacent accommodation spaces through the port, that is, the dispersion piece plays a radial shearing role on the reactant moving along the axial direction in the reactant chamber, so as to better achieve the mixing of the reactants, improve the mass transfer effect, and thus improve the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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 will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0019] Figure 1 This is a schematic structural diagram of an embodiment of an active mixing continuous flow reactor of the present invention;

[0020] Figure 2 for Figure 1 Exploded view of an active mixing continuous flow reactor;

[0021] Figure 3 It is a structural schematic diagram of another embodiment of the active mixing continuous flow reactor of the present invention;

[0022] Figure 4 for Figure 3 Exploded diagram of an active mixing continuous flow reactor;

[0023] Figure 5 This is a schematic structural diagram of another embodiment of the active mixing continuous flow reactor of the present invention;

[0024] Figure 6 for Figure 5 Exploded view of an active mixing continuous flow reactor;

[0025] Figure 7 for Figure 5 Schematic diagram of the cross-sectional structure of the active mixing continuous flow reactor;

[0026] Figure 8 It is a structural schematic diagram of an embodiment of a continuous feeding device of an active mixing continuous flow reactor;

[0027] Fig. 9 for Figure 8 Exploded view of the continuous feeding device;

[0028] Fig.10 Schematic diagram of the structure of a reaction system according to an embodiment of the present invention.

[0029] Description of Figure Numbers:

[0030] Label name Label name 10 Reaction tube 100 Feeding device body 11 Reactant chamber 101 Gas feed port 12 Ventilation tube 102 Discharge port 13 Support tube 200 Feeding screw 20 Dispersed parts 300 Drive motor 21 Over 400 Magnetic coupler 30 Heat exchange sleeve

[0031] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0034] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if the meaning of "and / or" appearing in the full text is to include three parallel schemes, taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0035] The invention provides an active mixing continuous flow reactor.

[0036] Reference Figure 1 and Figure 2 In one embodiment of the present invention, the active mixing continuous flow reactor comprises a reaction tube 10, a dispersing member 20 and a driving device. The reaction tube 10 is provided with a reactant chamber 11 for containing reactants. The dispersing member 20 is arranged in the reactant chamber 11 and extends along the axial direction of the reaction tube 10, and divides the reactant chamber 11 into a plurality of containing spaces. The dispersing member 20 is provided with a port 21 for transferring reactants between two adjacent chamber spaces. The driving device is connected to the reaction tube 10 and / or the dispersing member 20, and is used to drive the reaction tube 10 and / or the dispersing member 20 to reciprocate along the radial direction of the reaction tube 10. The port 21 is a circular hole, an elliptical hole, a square hole, a triangular hole or an opening of an irregular shape.

[0037] The technical solution of the present invention adopts the method of setting a reactant chamber 11 on the reaction tube 10, and the reactant can move along the axial direction of the reaction tube 10 after entering the reactant chamber 11; and setting a dispersion member 20 in the reactant chamber 11, using the dispersion member 20 to divide the reactant chamber 11 into a plurality of accommodation spaces extending along the axial direction of the reaction tube 10, and setting a port 21 on the dispersion member 20 for the reactant to transfer between two adjacent accommodation spaces; and the driving device is connected to the reaction tube 10 and / or the dispersion member 20, when the driving device drives the reaction tube 10 and / or the dispersion member 20 to move along the radial direction of the reaction tube 10 During reciprocating motion, the reaction tube 10 and the dispersion member 20 reciprocate together along the radial direction of the reaction tube 10, or the dispersion member 20 reciprocates along the radial direction of the reaction tube 10 in the reaction tube 10, so that the reactants in the reactant chamber 11 move relative to the dispersion member 20 under the action of gravity and inertia, and move in each accommodation space, or transfer between adjacent accommodation spaces through the port 21, that is, the dispersion member 20 plays a radial shearing role on the reactants moving axially in the reactant chamber 11, so as to better achieve the mixing of the reactants, improve the mass transfer effect, and thus improve the production efficiency. It can be understood that the reaction tube 10 is provided with a material inlet for the reactants to enter the reactant chamber 11.

[0038] Generally, the slurry has a high specific gravity and will be in the lower part of the reaction tube 10 under the action of gravity, while the gas will be in the upper part of the reaction tube 10. If the specific gravity of the solid particles in the slurry is greatly different from that of the liquid, the solid particles will settle to the bottom of the liquid, thus forming a multi-layer distribution with poor mixing effect. In order to achieve effective mixing of gas, liquid and solid, the above embodiment strengthens the three-phase mass transfer and heat transfer by designing the internal structure of the reaction tube 10 and active mixing.

[0039] Furthermore, since the active mixing continuous flow reactor is a tubular reactor, it has the advantages of small back-mixing, high volumetric efficiency, high temperature control accuracy and low cost, and can be widely used in laboratory research and industrial production.

[0040] It is understandable that in the above embodiment, when the driving end of the driving device is connected to the reaction tube 10, the reaction tube 10 is driven to reciprocate, so that the reactants in the reactant chamber 11 are shaken, and the dispersion of the reactants is accelerated. Among them, the dispersion member 20 can be set to be fixed or not fixed to the reaction tube 10. When the dispersion member 20 is fixed to the reaction tube 10, the dispersion member 20 moves synchronously with the reaction tube 10, and the reactants shake under the action of gravity and inertia. During the shaking process, they will be sheared and dispersed by the dispersion member 20, thereby improving the mass transfer effect; when the dispersion member 20 is not fixed to the reaction tube 10, the dispersion member 20 shakes under the action of gravity and inertia during the reciprocating movement of the reaction tube 10, but the shaking of the dispersion member 20 is not synchronized with the shaking of the reactants, thereby shearing and dispersing the reactants and improving the mass transfer effect. The internal structure of the reaction tube 10 of this scheme is very simple, easy to process, low cost, and there is no problem of transmission shaft sealing.

[0041] In one embodiment, the material inlet is arranged at one axial end of the reaction tube 10. After the reactants enter the reactant chamber 11 from the material inlet, they gradually accumulate. The reactants that enter later cause the reactants that enter earlier to flow axially. During the process of axial flow, the reactants are also subjected to the radial shearing effect of the dispersion element 20, thereby improving the mass transfer effect.

[0042] In some embodiments, the dispersing member 20 is a partition plate (not shown) disposed in the reactant chamber 11. By disposing the partition plate in the reactant chamber 11, the reactant chamber 11 is divided into a plurality of accommodation spaces by the partition plate, and the partition plate radially shears the reactants flowing along the axial direction to achieve efficient mass transfer. The partition plate is fixed to the inner wall of the reaction tube 10 or the partition plate is movably connected to the reaction tube 10.

[0043] In one embodiment, a plurality of partition plates are provided, such as two, three, four, five or more, and the plurality of partition plates are arranged at intervals along the radial direction of the reaction tube 10. By providing a plurality of dispersion members 20, the shearing effect on the reactants is enhanced, and the mass transfer effect is further improved. Among them, the plurality of partition plates are arranged parallel to each other or nearly parallel to each other. It is understandable that in this embodiment, the plurality of partition plates are fixed at intervals on the inner wall of the reaction tube 10, or the plurality of partition plates are arranged in a grid shape and then movably connected in the reaction tube 10, so as to realize the radial spacing arrangement of the plurality of partition plates along the reaction tube 10.

[0044] In one embodiment, the ports 21 on each partition plate are staggered, thereby forming multiple shearing stages for the reactants and making the mixing more uniform.

[0045] Reference Figure 2In some embodiments, the dispersing member 20 is arranged in a curved shape. More openings 21 can be arranged on the dispersing member 20 arranged in a curved shape, so that while ensuring the shearing effect on the reactants, the transfer speed of the reactants between the accommodating spaces is accelerated, and the mixing is faster and more uniform.

[0046] In one embodiment, the dispersion member 20 is a cylinder disposed in the reactant chamber 11. The cylinder is disposed in the reactant chamber 11 of the reaction tube 10, and the reactants are bound to be subjected to shear force when entering and exiting the cylinder, so that the mixing effect is better. In other embodiments, the shape of the dispersion member 20 can also be set to a cross-section of C-shape, S-shape or irregular shape. In this embodiment, the internal structure of the reaction tube 10 is very simple, easy to process, and low in cost. There is no need to set an additional structure to enhance passive mixing, which avoids the problem of uneven dispersion due to differences in material density, and there are also no problems such as transmission shaft sealing problems and solid accumulation to form dead volume.

[0047] In one embodiment, a plurality of ports 21 are provided, and the plurality of ports 21 are arranged at intervals along the length direction of the cylinder, and / or the plurality of ports 21 are arranged at intervals along the circumference of the cylinder. By arranging the plurality of ports 21 at intervals along the length direction of the cylinder and / or along the circumference of the cylinder, the reactants are more evenly dispersed to various parts of the reactant chamber 11, and while ensuring the shearing effect on the reactants, the transfer speed of the reactants between the accommodation spaces is accelerated, and the mixing is faster and more uniform.

[0048] In one embodiment, the cylinder is used to hold solids. The cylinder is used to hold solid reactants or solid catalysts. The solids swing inside the cylinder, driving the gas and liquid to contact the solids inside the cylinder. The gas and liquid flow through the opening 21 on the cylinder in the gaps between the solid particles to react. This not only solves the problem that solid particles are difficult to disperse in liquids, but also has good mass transfer and heat transfer performance. For some situations where the reactant particles are large and have a large specific gravity, for example, the solid particle size is 20 mesh-100 mesh, the solid particles are placed inside the cylinder, and the gas and liquid flow through the solids to mix, solving the problem that the reactant particles are difficult to disperse when they are large.

[0049] Reference Figures 3 to 5 In one embodiment, multiple layers of sleeves are arranged in the cylinder, such as two layers, three layers, four layers or more layers, and the sleeves are used to accommodate solid particles. The size of the openings 21 on different sleeves can be adjusted according to actual needs. For example, the size of the opening 21 of the sleeve accommodating large particles is larger than the size of the opening 21 of the sleeve accommodating small particles, so that the fluid can flow faster and mix more evenly without leaving the sleeve from the opening 21. Different solid particles are accommodated in different sleeves, which is convenient for classifying and taking out solid particles such as solid reactants, solid products, and solid catalysts.

[0050] Reference Figure 6 and Figure 7 In one embodiment, the dispersing element 20 is arranged in a spiral shape, for example, in a spring shape, the diameter of the spring (the shape of the spring is not limited) is 2 / 3 of the diameter of the reaction tube 10, and the spiral pitch is 10 mm. The spiral dispersing element 20 is used to fully shear and mix the reactants to solve the problem of poor mass transfer effect in reactions such as crushing, dispersion, and emulsification with solid precipitation or solid particle suspensions.

[0051] In the above embodiment, a gas permeable tube 12 is provided in the reactant chamber 11, and the gas permeable tube 12 is used to accommodate gas reactants. The gas is input into the gas permeable tube 12, and dispersed into other fluids in the reactant chamber 11 through the gas permeable holes on the wall of the gas permeable tube 12, and the shaking of the dispersion member 20 drives the bubbles to disperse in the gas. When the reaction tube 10 moves up and down, the fluid in the reaction tube 10 collides with the internal structure of the reaction tube 10, and under the shearing action of the internal structure, the mixing of the fluid is continuously maintained, thereby enhancing mass transfer and heat transfer.

[0052] In one embodiment, the air tube 12 is an AF2400 polytetrafluoroethylene hydrophobic air tube 12, the diameter of the air tube 12 is 8mm-20mm, such as 10mm, and the air tube 12 is arranged in the middle of a spring-shaped or cylindrical dispersion member 20, and the dispersion member 20 drives the air tube 12 to shake, thereby improving the stirring effect, and the hydrophobic and breathable properties of the AF2400 polytetrafluoroethylene hydrophobic air tube 12 are conducive to the dispersion of gas into liquid, further improving the mixing effect. By combining the up and down oscillation mixing method with membrane dispersion bubbling, it has a strong gas-liquid-solid mixing effect and a uniform dispersion of bubbles, and a bubbling mixing function, which strengthens the three-phase mass transfer and heat transfer of gas, liquid and solid, has excellent gas-liquid-solid three-phase mass transfer and heat transfer performance, and improves the reaction efficiency. The unique gas dispersion bubbling tube and the dispersion element 20 in the reaction tube 10 cooperate with the up and down oscillation method, which greatly improves the mass transfer performance of gas-liquid-solid multiphase reactions and the reaction efficiency, and provides an ideal reaction environment and high-performance equipment for the continuous preparation and production of high-value-added fine chemicals, pharmaceutical intermediates, new materials, etc., which is conducive to promoting the transformation of chemical and pharmaceutical fields from kettle processes to miniaturized continuous processes.

[0053] In the above embodiment, since the AF2400 polytetrafluoroethylene hydrophobic air permeable tube 12 is a thin film tube, the thin film tube itself has low structural strength. In order to prevent the air permeable tube 12 from being deformed or damaged during the reaction and stirring process and affecting the gas feeding, a support tube 13 is provided inside the air permeable tube 12, and air holes are provided on the tube wall of the support tube 13, or a support tube 13 is provided outside the air permeable tube 12, and air holes are provided on the tube wall of the support tube 13. In addition, the support tube 13 is provided to make the installation of the air permeable tube 12 more convenient and the sealing effect better. The material of the support tube 13 is not limited, such as a hard plastic tube, a stainless steel tube, etc.

[0054] In one embodiment, the diameter of the reaction tube 10 is 400mm-1000mm, and the reaction tube 10 is provided with an AF2400 polytetrafluoroethylene hydrophobic air-permeable tube 12 and a dispersion member 20, and the diameter of the dispersion member 20 is 1 / 2-3 / 4 of the diameter of the reaction tube 10, such as the diameter of the dispersion member 20 is 2 / 3 of the diameter of the reaction tube 10. The dispersion member 20 is a metal tube with a plurality of circular holes, and the circular hole size is 10mm-20mm. The dispersion member 20 shakes radially inside the reaction tube 10 under the action of external force, and forms shear on the fluid coming from the axial direction, forming a high shear stirring effect, which is suitable for gas / liquid, solid / liquid, liquid / liquid, gas / liquid / solid reactions, etc. It combines the advantages of a membrane reactor and an active mixing reactor, and has both the excellent bubble dispersion function of a membrane reactor and the advantages of an active mixer in solid particle dispersion. It has excellent gas-liquid-solid three-phase mass transfer and heat transfer performance, and can realize continuous process amplification and production of multiphase reactions.

[0055] In the above embodiments, the dispersion elements 20 with different structures can realize a plurality of different reaction situations, thus greatly expanding the application space.

[0056] In one embodiment, the axis of the reaction tube 10 is arranged horizontally, and the air tube 12 is arranged near the bottom of the reactant chamber 11, and the air tube 12 is arranged in the middle of the spring-shaped or cylindrical dispersion member 20, so as to better stir the bottom, so that the solid particles or suspensions that are easy to sink to the bottom under the action of gravity can be better dispersed evenly.

[0057] In one embodiment, a heat exchange sleeve 30 is provided outside the reaction tube 10, and heat is transferred to the heat exchange fluid in the heat exchange sleeve 30 through the heat exchange sleeve 30. The fluid only flows between the heat exchange sleeve 30 and the reaction tube 10, and the heat transfer distance is short. In addition, the agitator accelerates the heat transfer and maintains good heat transfer performance. In addition, the heat transfer in the reaction tube 10 can also be locally adjusted by adjusting the temperature of the gas passing into the air permeable tube 12.

[0058] In the above embodiment, the driving device is a motor or a cylinder or an electric cylinder, which drives the reaction tube 10 to move, so that the dispersion element 20 shakes in the reaction tube 10 to achieve shear stirring of the reactants in the reactant chamber 11.

[0059] Reference Figure 8 and Fig. 9In one embodiment of the present invention, the active mixing continuous flow reactor further comprises a continuous feeding device, which is connected to the reaction tube to continuously feed the reaction tube. The continuous feeding device comprises a feeding device body 100, a feeding screw 200, a driving motor 300 and a magnetic coupling 400. The feeding device body 100 has a feeding port and a feeding cavity for communicating with the reactant cavity. The feeding port is connected to the feeding cavity for solid particles to enter the feeding cavity. The feeding screw 200 is arranged in the feeding cavity. The material in the feeding cavity can be dispersed by rotating the feeding screw 200, so that the material can enter the reactant cavity of the reaction device from the feeding cavity more evenly, so as to achieve uniform feeding. The driving motor 300 is used to drive the feeding screw 200 to rotate. One end of the magnetic coupling 400 is connected to the driving end of the driving motor 300, and the other end is connected to the feeding screw 200. Among them, the magnetic coupler 400 includes a copper rotor, a permanent magnet rotor and a controller. There is an air gap (called an air gap) between the copper rotor and the permanent magnet rotor, and there is no mechanical connection for transmitting torque. The feeding screw 200 is connected to the drive motor 300 using the magnetic coupler 400. It has a simple structure, is easy to install, has a long service life, has a good energy-saving effect, and has a small maintenance workload. It allows a larger installation centering error (up to 5 mm), which greatly simplifies the installation and debugging process. It has an overload protection function, thereby improving the reliability of the entire system, and can enhance the starting ability of the drive motor 300, reduce impact and vibration, and thus reduce the impact of the feeding process on the reaction equipment.

[0060] The technical solution of the present invention is to set a feeding screw 200 in the feeding chamber of the feeding device body 100, and use a driving motor 300 to drive the feeding screw 200 to rotate, thereby driving the solid particles entering the feeding chamber from the feeding port to move spirally, so as to evenly feed the reactant chamber of the reaction equipment. Since the feeding screw 200 and the driving motor 300 are connected by a magnetic coupler 400, there is no mechanical connection for transmitting torque, so that a soft (magnetic) connection is formed between the feeding screw 200 and the driving motor 300. The torque and speed of the feeding screw 200 shaft can be changed by adjusting the air gap, and the adjustment is more precise and stable, so that the feeding screw 200 can be better utilized to evenly feed the reaction equipment, thereby solving the problem of difficult uniform feeding of solid materials in continuous flow processes.

[0061] It can be understood that, in the above embodiment, the feeding port allows solid particles to enter the feeding cavity, and the feeding port is not limited to only allowing solid particles to enter the feeding cavity. In actual application, liquid and gas can also enter the feeding cavity through the feeding port, that is, the continuous feeding device in the above embodiment can be used for feeding single-phase reactions and feeding multi-phase reactions.

[0062] In the above embodiment, the shape of the feeding screw 200 is not limited, and its length matches the length of the feeding device body 100. The position of the feeding screw 200 in the feeding chamber can be adjusted according to actual needs, for example, the feeding screw 200 is set in the middle of the feeding chamber to stabilize the structure of the continuous feeding device; or, considering that solid particles or solids in the slurry will sink under the action of gravity, the center of gravity of the continuous feeding device during the feeding process moves downward, so the feeding screw 200 can be set at the lower part of the feeding chamber, which will not affect the structural stability of the continuous feeding device and can better disperse the materials gathered in the lower part of the feeding chamber.

[0063] In one embodiment, the feeding device body 100 also has a liquid feeding port. It is understandable that during the slurry feeding process, not only solid particles enter the feeding cavity, but also liquid materials need to enter the feeding cavity. By setting the liquid feeding port, the liquid material can enter the feeding cavity from the liquid feeding port, so that during the feeding process, the solid and the liquid enter the feeding cavity from different ports respectively, avoiding the solid particles from being wetted by the liquid material and agglomerating to block the feeding port, so that the slurry feeding is more uniform.

[0064] In one embodiment, a plunger pump is provided at the liquid feed port, and liquid material is added through the plunger pump. Since the plunger pump has a high rated pressure, a compact structure, and convenient flow adjustment, the liquid material feeding process is easy to adjust. The added liquid material is mixed with the solid particles, and then the solid particles are kept suspended under the stirring of the feeding screw 200, so that uniform slurry feeding is achieved.

[0065] In one embodiment, the feeding device body 100 further has a gas feed port 101. By providing the gas feed port 101, the gas feed is separated from the liquid feed and the solid feed, so as to be more conducive to uniform mixing of the gas, the liquid feed and the solid feed. In addition, the pressure in the feed chamber can be adjusted by inert gas through the gas feed port 101 to maintain the pressure balance in the feed chamber.

[0066] In one embodiment, the continuous feeding device further includes a pressure display and / or a safety valve. The pressure display is provided to facilitate the operator to understand the pressure in the feeding chamber to avoid pressure imbalance, and the safety valve is provided to prevent the pressure in the feeding chamber from exceeding a specified value to ensure safety during the reaction.

[0067] Uniform feeding of solid catalysts in continuous flow processes has always been a problem that has plagued the application of continuous flow multiphase reactors. Small-flow diaphragm pumps have problems with uneven slurry pumping and low pumping pressure. Industrial diaphragm reciprocating pumps can achieve high-pressure pumping of slurries, but the flow rate is very large and cannot be used in continuous flow processes. The continuous feeding device of the technical solution of the present invention, while meeting the continuous flow multiphase reaction conditions, ensures more uniform feeding, solves the problem of feeding slurries and solids under high pressure at small flow rates, and can achieve continuous feeding of slurries in high-pressure systems.

[0068] In one embodiment, the feeding device body 100 also has a discharge port 102 for connecting to the reaction equipment. The discharge port 102 is provided with a metering needle valve, and the metering needle valve is used to control the output flow rate of the slurry, so as to better control the feeding process. The pressure of conventional slurry pumping by a diaphragm pump is relatively low, generally within 10 bar, and the pumping is not uniform enough, and the solution forms deposits in the pumping pipeline. This embodiment uses high-pressure gas to push the material into the reactor, and the pressure can be as high as 100 bar, which solves the slurry feeding of the high-pressure continuous flow system. The catalyst solid and liquid are continuously added to the feeding chamber, uniformly mixed under the stirring of the feeding screw 200, and directly enter the reaction equipment after passing through the metering needle valve. The uniformity of the slurry feeding is improved, and there is no deposition of the pump pipe.

[0069] In one embodiment, the discharge port 102 and the gas feeding port are respectively arranged at two ends of the feeding device body 100, so that the gas material has more time to mix with the solid or liquid material in the feeding cavity after entering the feeding cavity, making the feeding more uniform.

[0070] In one embodiment, the discharge port 102 is disposed at the bottom of the feeding device body 100. The discharge port 102 is disposed at the bottom of the feeding device so that the solid or slurry material can be discharged from the discharge port 102 more smoothly, thereby making the solid or slurry feeding more uniform and making the subsequent cleaning of the feeding device body 100 more convenient. Among them, electromagnetic switches are respectively provided for the feeding port and the discharge port 102. During the feeding process, the electromagnetic switch of the feeding port at the upper end is turned on, the solid or slurry is added to the feeding cavity, the feeding screw 200 stirs, and then the electromagnetic switch of the feeding port at the upper end is closed, and the electromagnetic switch of the discharge port 102 at the lower end is turned on, and a small batch of solid or slurry is added to the reactant cavity of the reaction setting through the discharge port 102.

[0071] In one embodiment, the feeding device body 100 is a high-pressure resistant stainless steel cavity, which is safer, more stable and has a longer service life.

[0072] In the above embodiment, the continuous feeding device also includes an electric heater, which is used to heat the feeding device body 100 to achieve continuous feeding of the slurry at high temperature, saving a preheater, and preventing the deposition of solids in the preheater, solving the problem of continuous feeding at high temperature. Among them, the type of electric heater is not limited. In the traditional feeding device, the diaphragm pump can only pump the slurry at room temperature, and the slurry pipeline needs to be preheated before entering the reactor. There is a lot of slurry deposition in the preheating pipe, and the solids entering the reactor are uneven, resulting in insufficient local catalysts during the continuous reaction process, seriously affecting the reaction effect, and the expensive catalyst is seriously wasted. In the above embodiment, by setting the continuous feeding device including an electric heater, the slurry can be directly fed into the reactor after being preheated in the feeding chamber, saving the preheater before the reactor, and preventing the deposition of solids in the preheater, improving the reaction efficiency and catalyst utilization efficiency, saving costs, and solving the problem of continuous feeding at high temperature.

[0073] Reference Fig.10 The present invention also proposes a reaction system, which includes an active mixing continuous flow reactor. The specific structure of the active mixing continuous flow reactor refers to the above embodiment. Since the present reaction system adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here. Among them, there is one active mixing continuous flow reactor, or there are multiple active mixing continuous flow reactors, and multiple active mixing continuous flow reactors are arranged in series or in parallel to improve the reaction yield or extend the residence time. For example, multiple active mixing continuous flow reactors are arranged in series to achieve multi-stage continuous production, multi-step reaction or multi-temperature zone reaction or scale-up. The parallel arrangement of multiple active mixing continuous flow reactors reduces the pressure drop of the reaction tube 10 and has a large flux, so as to achieve process amplification production in a few minutes or even tens of minutes, and solves the problem that the mass transfer and heat transfer performance in the continuous process amplification and production of multi-phase reactions involving gas, liquid and solid is poor, and the small test reaction cannot be amplified. It has broad application prospects in continuous process amplification and production.

[0074] In the above embodiment, the heat exchange sleeves 30 of multiple active mixing continuous flow reactors are arranged in series or in parallel. The heat exchange sleeves 30 form a single temperature zone when connected in series, and form multiple temperature zones when connected in parallel. A gas regulating valve is installed at the port of the active mixing continuous flow reactor to balance the gas pressure of the multi-stage series pipe. The gas outlet of the series reactor is externally connected to a back pressure regulating valve, and the outlet of the reaction material is connected to a gas-liquid separator. The entire set of reactors is fixed on an oscillating bottom plate and moves with the reciprocating motion of the oscillating bottom plate. Among them, the oscillating bottom plate is driven to reciprocate by a motor or a cylinder, and the frequency of the movement is adjustable, the oscillation frequency is 2HZ-10HZ, and the amplitude is 10mm-60mm, so as to achieve efficient reaction mass transfer and heat transfer.

[0075] In one embodiment, the inner diameter of the reaction tube 10 is 20 mm-80 mm, the tube length of the reaction tube 10 is 20 mm-100 mm, an oil bath heat exchange sleeve 30 is arranged outside the reaction tube 10, the axis of the reaction tube 10 is arranged horizontally or nearly horizontally, a breathable tube 12 is arranged inside the reaction tube 10 below the axis, the tube diameter of the breathable tube 12 is 3 mm-10 mm, the breathable tube 12 is an amorphous polytetrafluoroethylene AF2400 microporous tube or an expanded PTFE hydrophobic breathable microporous tube or a microporous metal gas distributor, and bubbling is performed at the bottom of the reaction tube 10 through the breathable tube 12, which is conducive to mixing the gas with the slurry at the bottom of the reaction tube 10; two layers of porous partition plates are arranged in the reaction tube 10, and the slurry passes through the partition plates up and down during the reciprocating vibration of the reaction tube 10, and is sheared by the partition plates, dispersed into droplets and fully mixed with the gas. The reaction tube 10 vibrates up and down by a motor, the vibration amplitude is greater than 0 mm and less than or equal to 60 mm, the maximum vibration amplitude oscillation frequency range is greater than 0 rpm and less than or equal to 500 rpm, and the reaction tube 10 is fixed on the motor by a bracket.

[0076] The above descriptions are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. An active mixing continuous flow reactor, characterized in that: include: A reaction tube is provided with a reactant chamber, wherein the reactant chamber is used to accommodate reactants; A dispersion member is disposed in the reactant chamber, the dispersion member extends along the axial direction of the reaction tube and divides the reactant chamber into a plurality of accommodation spaces, and the dispersion member is provided with a port for transferring reactants between two adjacent accommodation spaces; as well as A driving device, connected to the reaction tube and / or the dispersing member, for driving the reaction tube and / or the dispersing member to reciprocate along the radial direction of the reaction tube; The dispersing element is arranged in a spiral shape, a ventilation tube is arranged in the reactant chamber, the ventilation tube is an AF2400 polytetrafluoroethylene hydrophobic ventilation tube, a support tube is arranged inside the ventilation tube, and ventilation holes are arranged on the tube wall of the support tube.

2. The active mixing continuous flow reactor according to claim 1, characterized in that: The gas permeable tube is used to contain gaseous reactants.

3. A reaction system, characterized in that: It comprises the active mixing continuous flow reactor as described in any one of claims 1 to 2, wherein one or more active mixing continuous flow reactors are provided, and the multiple active mixing continuous flow reactors are arranged in series or in parallel.

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