A reactor based on multi-layer convection collision and a multi-layer convection collision method

Abstract

The present invention relates to the field of mixing preparation technology, specifically to a reactor and a multi-layer convection collision method based on multi-layer convection collision, comprising: a bracket, and a reaction tank body and a fixed plate fixed on the bracket, the bracket also being fixed with a symmetrically arranged piston cylinder; a feed pipe, connected to the side wall of the reaction tank body and symmetrically arranged; a reflux hedging mechanism, arranged on the fixed plate and connected to the piston cylinder, for controlling the circulation impact of the solution in the reaction tank body; a pressure control mechanism, arranged in the piston cylinder, a driving mechanism connected to the pressure control mechanism being arranged on the fixed plate, the driving mechanism being able to continuously adjust the pumping pressure of the reflux hedging mechanism through the pressure control mechanism when the reflux hedging mechanism moves, so as to perform a mixing action on the solvent, and inducing non-steady-state turbulence by controlling the solution to circulate and hedging at different pressures to ensure the best solution mixing effect.

Description

Technical Field

[0001] The invention relates to the technical field of mixed preparation, in particular to a reactor based on multi-layer convection collision and a multi-layer convection collision method. Background Art

[0002] When preparing 3-cyclopropylamino-2-(2,4-dichloro-5-fluoro-benzoyl)-ethyl acrylate, the production and preparation is mainly achieved by mixing the raw material solutions with each other and maintaining the required reaction temperature.

[0003] During the reaction, if the mixing is uneven, it may cause the local concentration to be too high or too low, affecting the reaction rate and the efficiency of the formation of the acyl chloride. The uneven local concentration will cause the local reaction temperature to be too high or too low, affecting the selectivity and rate of the reaction. It may also cause the reaction selectivity to decrease and affect the regional selectivity of the product, that is, cyclopropylamine may attack the wrong position, thereby leading to the generation of side reactions.

[0004] Therefore, the solution needs to be fully mixed during the reaction. Existing mixing is mainly achieved by mechanical stirring. To achieve a sufficient mixing effect, a high stirring rate is required. However, high-speed stirring may break sensitive intermediates or cause emulsification, or even destroy the molecular structure of the reactants, resulting in the wrong reaction direction.

[0005] To this end, mixing can be achieved by controlling the constant pressure between the solutions. Constant pressure mixing can make the two solutions mix rapidly in a short period of time, forming turbulence, increasing the collision frequency between the reactants, and thus improving the reaction rate and reaction efficiency. However, during the constant pressure mixing process, the turbulence intensity in the fluid collision area will tend to a steady state, resulting in the shear force and droplet breakup efficiency reaching the upper limit and being difficult to further increase. Boundary layer accumulation of steady-state flow is likely to occur, leading to local concentration equilibrium and droplet re-agglomeration problems. Summary of the Invention

[0006] The object of the present invention is to provide a reactor and a multi-layer convection collision method based on multi-layer convection collision to solve the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A reactor based on multi-layer convection collision, comprising:

[0009] A bracket, and a reaction tank body and a fixing plate fixed on the bracket, wherein the bracket is also fixed with symmetrically arranged piston cylinders;

[0010] Also includes:

[0011] The feed pipe is connected to the side wall of the reaction tank and is symmetrically arranged to control the solvents to offset each other in the horizontal direction;

[0012] A reflux countermeasure mechanism, disposed on the fixed plate and connected to the piston cylinder, for controlling the circulation impact of the solution in the reaction tank;

[0013] A pressure control mechanism is arranged in the piston cylinder, and a driving mechanism connected to the pressure control mechanism is arranged on the fixed plate. When the reflux counter-pressure mechanism moves, the driving mechanism can continuously adjust the pumping pressure of the reflux counter-pressure mechanism through the pressure control mechanism to perform a mixing action on the solvent.

[0014] As a further solution of the present invention: the pressure control mechanism includes a first movable sleeve and a second movable sleeve slidably installed at both ends of the piston cylinder, a first push plate is fixed to the end of the first movable sleeve, and a second push plate is fixed to the end of the second movable sleeve, and the first push plate and the second push plate can slide axially along the piston cylinder.

[0015] As a further solution of the present invention: the pressure control mechanism also includes a first limiting wheel and a second limiting wheel respectively fixed on the first movable sleeve and the second movable sleeve, and the first movable sleeve and the second movable sleeve are respectively provided with a first spring and a second spring, and the two ends of the first spring are respectively abutted against the first limiting wheel and the piston cylinder, and the two ends of the second spring are respectively abutted against the second limiting wheel and the piston cylinder.

[0016] As a further solution of the present invention: the driving mechanism includes a second motor fixed on the fixed plate, and a rotating rod connected to the output shaft of the second motor is rotatably mounted on the fixed plate.

[0017] As a further solution of the present invention: the driving mechanism also includes a first rotating disk and a second rotating disk fixed on both sides of the rotating rod, the first rotating disk is fixed with a first guide ring that interferes with the first limiting wheel, and the second rotating disk is fixed with a second guide ring that interferes with the second limiting wheel.

[0018] As a further solution of the present invention: the backflow offset mechanism includes a piston disc sliding along the axial direction of the piston cylinder, a movable rod is fixed to the side wall of the piston disc, and a movable plate is fixed to the end of the movable rod;

[0019] It also includes a cylinder fixed on the fixed plate and used for driving the movable plate to move axially along the movable rod, and a circulation component is provided on the piston cylinder.

[0020] As a further solution of the present invention, the circulation component includes a first absorption tube and a second absorption tube connected to the piston cylinder and the reaction tank body, and used for sucking the solution in the reaction tank body into the piston cylinder.

[0021] As a further solution of the present invention: the circulation component further includes a first convection tube and a second convection tube connected to the piston cylinder and the reaction tank body, for guiding the solution in the piston cylinder to perform a hedging action.

[0022] As a further solution of the present invention: a first motor is fixed to the bottom of the reaction tank body, a transmission rod connected to the output shaft of the first motor is rotatably installed in the reaction tank body, and stirring blades equidistantly distributed around the circumference are fixed to the transmission rod.

[0023] A multi-layer convection collision method comprises the following steps:

[0024] Step 1: Deliver the required solvent into the reaction tank through two feeding pipes, and control the impact of the solvents on each other;

[0025] Step 2: The reflux hedging mechanism works and draws the solution in the reaction tank into the piston cylinder, and then controls the solution in the piston cylinder to impact and flow back into the reaction tank;

[0026] Step 3: Under the action of the driving mechanism, the movement of the pressure control mechanism is controlled to continuously adjust the pressure in the piston cylinder so that the pressure of the solution pumped by the reflux counteraction mechanism continuously changes.

[0027] Compared with the prior art, the beneficial effect of the present invention is that the present application can enhance the mixing effect and reaction rate of the reaction solution through a multi-layer circulation hedging method to ensure the smooth preparation of the product. Specifically, the reaction solution can be controlled to undergo a first hedging and mixing through the feed pipe, and the solution circulation in the reaction tank body can be controlled through the reflux hedging mechanism, and a second hedging and mixing can be performed. At the same time, under the action of the driving mechanism, the pressure control mechanism is controlled to work so that the pressure of the two solutions in the second hedging and mixing changes periodically, and the mixing effect is further enhanced under the influence of pressure fluctuations.

[0028] By controlling the convective impact of the solution, the time required for molecular diffusion can be further shortened, thereby accelerating the reaction process. At the same time, the atomized droplets formed when the liquids collide greatly increase the contact area between the two phases, promoting mass transfer between the reactants. Continuous impact will cause the droplet surface to be constantly updated, avoiding the interface from being passivated due to the accumulation of reaction products.

[0029] By rotating the first guide ring and the second guide ring, the periodic change of the pumping pressure in the two piston cylinders can be controlled, and when the pumping pressure is kept low, the periodic instability of the jet boundary layer can be induced, and standing wave vortices can be generated, so that the mixing scale is refined to enhance the mixing effect of the solution. At the same time, in the low-pressure half-cycle of the pressure fluctuation, a large number of cavitation bubbles will be instantly generated inside the liquid. The shock wave released when the bubbles collapse can accelerate the reaction. The pressure fluctuation causes the thickness of the local diffusion boundary layer to change periodically. The interfacial tension fluctuation caused by the pressure change will drive the convection-diffusion coupled transport of the surfactant, thereby ensuring both the comprehensive progress of the reaction and the stability of the reaction system. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 The figure is a schematic structural diagram of an embodiment of a reactor based on multi-layer convection collision.

[0031] Figure 2 This is a structural schematic diagram of a partial reflux offset mechanism and a reaction tank body in an embodiment of a reactor based on multi-layer convection collision.

[0032] Figure 3 This is a schematic diagram of the connection relationship between the partial reflux offset mechanism, the driving mechanism, and the pressure control mechanism in an embodiment of a reactor based on multi-layer convection collision.

[0033] Figure 4 for Figure 3 A magnified schematic diagram of the structure at point A.

[0034] Figure 5 for Figure 3 Schematic diagram of the structure from another angle.

[0035] Figure 6 The figure is a schematic diagram of the cross-sectional structure of the piston cylinder in an embodiment of a reactor based on multi-layer convection collision.

[0036] Figure 7 This is a schematic structural diagram of a partial pressure control mechanism in an embodiment of a reactor based on multi-layer convection collision.

[0037] Figure 8 This is a schematic structural diagram of a partial pressure control mechanism in an embodiment of a reactor based on multi-layer convection collision.

[0038] Figure 9 The figure is a schematic diagram of the explosion structure of part of the pressure control mechanism in an embodiment of a reactor based on multi-layer convection collision.

[0039] Figure 10 This is a schematic structural diagram of the first motor, transmission rod, and stirring blade in an embodiment of a reactor based on multi-layer convection collision.

[0040] In the figure: 1. bracket; 2. reaction tank body; 3. feeding pipe; 4. first motor; 5. transmission rod; 6. stirring blade; 7. piston cylinder; 8. first absorption tube; 9. second absorption tube; 10. first convection tube; 11. second convection tube; 12. fixed plate; 13. cylinder; 14. movable plate; 15. movable rod; 16. piston disk; 17. first movable sleeve; 18. first push plate; 19. first spring; 20. first limiting wheel; 21. second movable sleeve; 22. second push plate; 23. second spring; 24. second limiting wheel; 25. second motor; 26. rotating rod; 27. first rotating disk; 28. first guide ring; 29. second rotating disk; 30. second guide ring. DETAILED DESCRIPTION

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0042] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0043] See also Figures 1 to 10 In an embodiment of the present invention, a reactor based on multi-layer convection collision includes:

[0044] A bracket 1, and a reaction tank body 2 and a fixing plate 12 fixed on the bracket 1. The bracket 1 is also fixed with a symmetrically arranged piston cylinder 7;

[0045] Also includes:

[0046] The feed pipe 3 is connected to the side wall of the reaction tank 2 and is symmetrically arranged to control the solvents to offset each other in the horizontal direction;

[0047] A reflux counteracting mechanism is provided on the fixed plate 12 and connected to the piston cylinder 7, and is used to control the circulation impact of the solution in the reaction tank body 2;

[0048] The pressure control mechanism is arranged in the piston cylinder 7, and a driving mechanism connected to the pressure control mechanism is provided on the fixed plate 12. The driving mechanism can continuously adjust the pumping pressure of the reflux counteraction mechanism through the pressure control mechanism when the reflux counteraction mechanism moves, so as to perform a mixing action on the solvent.

[0049] Specifically, when preparing 3-cyclopropylamino-2-(2,4-dichloro-5-fluoro-benzoyl)-ethyl acrylate, it is necessary to prepare the product by mixing in a homogeneous solution reaction. Therefore, the solution required for preparation can be pumped into the reaction tank 2 through two symmetrically located feed pipes 3. The two solutions will form a convection impact and form high shear force, turbulence and cavitation effects in the collision area. The impact force generated will overcome the interfacial tension and break the dispersed phase into tiny droplets. At the same time, the turbulence will also promote uniform distribution on the molecular scale to enhance The solution mixing effect accelerates the reaction rate. The solution after impact will fall into the reaction tank body 2. At this time, the solution in the reaction tank body 2 can be sucked into the piston cylinder 7 through the reflux hedging mechanism, and the solution in the piston cylinder 7 can be pumped into the reaction tank body 2 again in a hedging manner. At the same time, under the action of the driving mechanism, the movement of the pressure control mechanism is controlled to continuously adjust the pumping pressure of the solution in the piston cylinder 7 provided by the reflux hedging mechanism, so that the solutions pumped by the reflux hedging mechanism impact and collide with each other in a manner of continuously fluctuating impact pressure, thereby further enhancing the solution mixing effect.

[0050] Preferably, by controlling the solutions to collide once, the solutions can react quickly, and by controlling the solution reflux for a second impact and controlling the pressure to be in a periodic change state, non-steady-state turbulence can be induced, breaking the local concentration balance and inhibiting the re-coalescence of droplets, thereby further enhancing the mixing effect and increasing the reaction rate to ensure the smooth preparation of 3-cyclopropylamino-2-(2,4-dichloro-5-fluoro-benzoyl)-ethyl acrylate.

[0051] See also Figure 1-Figure 3 、 Figure 5 The reflux hedging mechanism includes a piston disk 16 that slides axially along the piston cylinder 7, a movable rod 15 is fixed to the side wall of the piston disk 16, and a movable plate 14 is fixed to the end of the movable rod 15; it also includes a cylinder 13 fixed on the fixed plate 12, which is used to drive the movable plate 14 to move axially along the movable rod 15, and a circulation component is provided on the piston cylinder 7, the circulation component includes a first absorption tube 8 and a second absorption tube 9 connected to the piston cylinder 7 and the reaction tank body 2, which is used to suck the solution in the reaction tank body 2 into the piston cylinder 7, and the circulation component also includes a first convection tube 10 and a second convection tube 11 connected to the piston cylinder 7 and the reaction tank body 2, which is used to guide the solution in the piston cylinder 7 to perform a hedging action.

[0052] It should be noted that a first one-way valve is provided at the connection between the first absorption tube 8 and the second absorption tube 9 and the piston cylinder 7, so that the solution can only flow from the reaction tank body 2 through the first absorption tube 8 and the second absorption tube 9 into the piston cylinder 7;

[0053] A second one-way valve is provided at the connection between the first convection tube 10 and the second convection tube 11 and the piston cylinder 7 so that the solution can only flow from the piston cylinder 7 through the first convection tube 10 and the second convection tube 11 into the reaction tank body 2 .

[0054] See also Figure 6 Specifically, the piston disc 16 divides the piston cylinder 7 into two cavities. In the initial state, under the action of the cylinder 13, the piston disc 16 is located at the end of its stroke toward the reaction tank body 2 through the movable plate 14 and the movable rod 15. The ends of the first convection tube 10 and the second convection tube 11 connected to the piston cylinder 7 are respectively located on both sides of the piston cylinder 7, and the delivery pipes of the first convection tube 10 and the second convection tube 11 are connected to each other and enter the reaction tank body 2 through the same pumping port.

[0055] When preparing 3-cyclopropylamino-2-(2,4-dichloro-5-fluoro-benzoyl)-ethyl acrylate, the solution is pumped into the reaction tank body 2 through the feed pipe 3, and the solution is controlled to undergo a counter-mixing. The mixed solution will fall into the reaction tank body 2. At this time, the mixing reaction effect between the solutions can be further enhanced by circulating pumping. Specifically, under the action of the cylinder 13, the movable rod 15 is controlled to move through the movable plate 14, thereby controlling the piston disc 16 to move in a direction away from the reaction tank body 2. Since the two cavities of the piston cylinder 7 are not filled with solution, under the action of the piston disc 16, the air in the cavity at the upper end of the piston disc 16 is pumped into the reaction tank body 2 through the first convection pipe 10. At the same time, the pressure in the cavity below the piston disc 16 is reduced. Under the action of negative pressure, the solution in the reaction tank body 2 is sucked into the cavity through the second absorption pipe 9;

[0056] Subsequently, when the piston disc 16 moves to the end of its stroke away from the reaction tank body 2, the cylinder 13 controls the piston disc 16 to move toward its initial position. Under the action of pressure, the solution is rapidly pumped into the reaction tank body 2 through the second convection tube 11 in a relative position. The two solutions will convectively impact each other and form high shear force, turbulence and cavitation effects in the collision area, thereby further increasing the solution mixing effect and reaction rate. At the same time, the pressure in the cavity above the piston disc 16 decreases, and the solution in the reaction tank body 2 is absorbed through the first absorption tube 8. When the piston disc 16 returns to its initial position, the above steps can be repeated to achieve a cyclic counter-hedging mixing treatment of the solution in the reaction tank body 2.

[0057] Preferably, by controlling the secondary convection impact of the solution, the time required for molecular diffusion can be further shortened, thereby accelerating the reaction process. At the same time, the atomized droplets formed during the liquid collision greatly increase the contact area between the two phases, promoting mass transfer between the reactants. Continuous impact will cause the droplet surface to be continuously updated, avoiding the interface from being passivated due to the accumulation of reaction products.

[0058] See also Figure 1 、 Figure 3-Figure 5 、 Figure 7-Figure 9 The pressure control mechanism includes a first movable sleeve 17 and a second movable sleeve 21 slidably mounted at both ends of the piston cylinder 7, a first push plate 18 is fixed to the end of the first movable sleeve 17, and a second push plate 22 is fixed to the end of the second movable sleeve 21, the first push plate 18 and the second push plate 22 can slide axially along the piston cylinder 7, and the pressure control mechanism also includes a first limiting wheel 20 and a second limiting wheel 24 fixed on the first movable sleeve 17 and the second movable sleeve 21 respectively, a first spring 19 and a second spring 23 are respectively sleeved on the first movable sleeve 17 and the second movable sleeve 21, the two ends of the first spring 19 are respectively abutted against the first limiting wheel 20 and the piston cylinder 7, and the two ends of the second spring 23 are respectively abutted against the second limiting wheel 24 and the piston cylinder 7.

[0059] See also Figure 1 、 Figure 3 、 Figure 5 、 Figure 6 The driving mechanism includes a second motor 25 fixed on the fixed plate 12, and a rotating rod 26 connected to the output shaft of the second motor 25 is rotatably mounted on the fixed plate 12, wherein the driving mechanism also includes a first rotating disk 27 and a second rotating disk 29 fixed on both sides of the rotating rod 26, and a first guide ring 28 that contacts and cooperates with the first limiting wheel 20 is fixed on the first rotating disk 27, and a second guide ring 30 that contacts and cooperates with the second limiting wheel 24 is fixed on the second rotating disk 29.

[0060] It should be noted that keys are fixed to the circumferential outer walls of the first movable sleeve 17 and the second movable sleeve 21. A keyway that cooperates with the key is formed on the through-hole provided by the piston cylinder 7 for the first movable sleeve 17 and the second movable sleeve 21 to slide freely. Under the action of the keyway and the key, the first movable sleeve 17 and the second movable sleeve 21 can only slide along the axial direction of the piston cylinder 7 without deviation. The first guide ring 28 and the second guide ring 30 have the same shape and size and are composed of three parts, namely a recessed guide rail, an inclined guide rail, and a protruding guide rail. The inclined guide rails are symmetrically arranged. The first guide ring 28 and the second guide ring 30 are staggered at a staggered angle of 180°.

[0061] Taking the first push plate 18 as an example, the space between the first push plate 18 and the piston plate 16 is the effective pumping space of the solution, and the effective spaces in the two piston cylinders 7 are defined as pumping space A and pumping space B respectively. In the initial state, the first spring 19 is in a compressed state, so that the first limiting wheel 20 has a tendency to move toward the fixed plate 12. The first limiting wheel 20 associated with the pumping space A is located at the connection point between the recessed guide rail and one of the inclined guide rails, and the first limiting wheel 20 associated with the pumping space B is located at the connection point between the protruding guide rail and the other inclined guide rail. The piston plates 16 in the two piston cylinders 7 are both located at the end of the stroke away from the fixed plate 12, so that the size of the pumping space A is at its maximum value, and the size of the pumping space B is smaller than the pumping space A.

[0062] When the cylinder 13 is working, the piston disc 16 can be controlled to move toward the fixed plate 12. At the same time, the second motor 25 is working and drives the rotating rod 26 to rotate, thereby driving the first rotating disc 27 to rotate, so that the first guide ring 28 moves. Therefore, the first limiting wheel 20 associated with the pumping space A moves relative to the first guide ring 28 and moves along the trajectory of one of the inclined guide rails, thereby driving the first movable sleeve 17 to move, so that the piston disc 16 and the first push disc 18 in the pumping space A move in the direction of approaching each other, thereby pumping the solvent in the pumping space A in a two-way pumping manner. The liquid is quickly transported to the reaction tank body 2 through the first convection tube 10, and the pumping pressure is relatively high. At the same time, the first limiting wheel 20 associated with the pumping space B also moves relative to the first guide ring 28 and moves along the trajectory of another inclined guide rail, so that the piston disk 16 and the first push disk 18 in the pumping space B move in the same direction and both move toward the fixed plate 12. Therefore, the pumping rate of the solution in the pumping space B is relatively low, and the pumping pressure is relatively low. The two solutions with different pressures pumped into the reaction tank body 2 through the first convection tube 10 will impact each other to enhance the solution mixing effect and reaction rate.

[0063] When the piston disc 16 moves to the end of its stroke toward the fixed plate 12, the rotating rod 26 rotates exactly half a circle. At this time, the cylinder 13 controls the piston disc 16 to move toward the initial position. When the piston disc 16 returns to the initial position, the rotating rod 26 rotates one circle, and the first limiting wheel 20 also returns to the initial position.

[0064] Similarly, since the second guide ring 30 and the first guide ring 28 are staggered at an angle of 180°, the space between the piston disk 16 and the second push disk 22 is also an effective space for solution pumping. Another effective space located in the same piston cylinder 7 as the pumping space A can be named pumping space C, and another effective space located in the same piston cylinder 7 as the pumping space B can be named pumping space D. The spatial change in the pumping space C is the same as the spatial change in the pumping space B, and the spatial change in the pumping space D is the same as the spatial change in the pumping space A. Therefore, when the piston disk 16 moves in the direction away from the fixed plate 12, the pumping pressure in the pumping space C will be less than the pumping pressure in the pumping space D, thereby realizing that the two solutions pumped through the first convection tube 10 and the second convection tube 11 offset each other with periodic pressure fluctuations. In this process, due to the beneficial effects brought about by the pressure fluctuations, the maximum pumping pressure provided to the solution does not need to be too large, thereby ensuring the stability of the reaction system.

[0065] Preferably, by rotating the first guide ring 28 and the second guide ring 30, the periodic changes in the pumping pressure in the two piston cylinders 7 can be controlled, which can induce periodic instability of the jet boundary layer, generate standing wave vortices, and refine the mixing scale to enhance the mixing effect of the solution. At the same time, in the low-pressure half-cycle of the pressure fluctuation, a large number of cavitation bubbles will instantly be generated inside the liquid. The shock wave released when the bubbles collapse can accelerate the reaction, and the pressure fluctuation causes the thickness of the local diffusion boundary layer to change periodically. The interfacial tension fluctuation caused by the pressure change will drive the surfactant to undergo convection-diffusion coupled transport, thereby further ensuring the comprehensive progress of the reaction.

[0066] See also Figure 10 A first motor 4 is fixed to the bottom of the reaction tank body 2, and a transmission rod 5 connected to the output shaft of the first motor 4 is rotatably installed in the reaction tank body 2. Stirring blades 6 are fixed on the transmission rod 5 and are evenly distributed around the circumference.

[0067] Furthermore, when preparing 3-cyclopropylamino-2-(2,4-dichloro-5-fluoro-benzoyl)-ethyl acrylate, a certain amount of gas will be generated during the reaction. In order to prevent the gas from affecting the reaction rate, it is necessary to control the timely discharge of the gas. At this time, the first motor 4 works and drives the stirring blade 6 to rotate through the transmission rod 5 to provide a certain stirring and oscillating effect, thereby ensuring that the gas can be discharged smoothly.

[0068] Among them, the rotation speed of the stirring blade 6 is relatively slow, the main purpose of which is to allow the gas to separate from the reaction solution to prevent the intermediate from being destroyed or causing emulsification and other problems due to high-speed stirring. The solution mixing reaction is mainly achieved through multi-stage circulation hedging. The two cooperate with each other to ensure the smooth preparation of the product.

[0069] A multi-layer convection collision method comprises the following steps:

[0070] Step 1: Deliver the required solvent into the reaction tank 2 through two feeding pipes 3, and control the impact of the solvents on each other;

[0071] Step 2: The reflux counteracting mechanism works and draws the solution in the reaction tank body 2 into the piston cylinder 7, and then controls the solution in the piston cylinder 7 to impact and flow back into the reaction tank body 2;

[0072] Step 3: Under the action of the driving mechanism, the pressure control mechanism is controlled to move, so as to continuously adjust the pressure in the piston cylinder 7, so that the pressure of the solution pumped by the reflux counteraction mechanism is continuously changed.

[0073] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0074] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A reactor based on multi-layer convection collision, comprising: A bracket, and a reaction tank body and a fixing plate fixed on the bracket, wherein the bracket is also fixed with symmetrically arranged piston cylinders; It is characterized by further comprising: The feed pipe is connected to the side wall of the reaction tank and is symmetrically arranged to control the solvents to offset each other in the horizontal direction; A reflux countermeasure mechanism, disposed on the fixed plate and connected to the piston cylinder, for controlling the circulation impact of the solution in the reaction tank; The backflow counteracting mechanism includes a piston disc sliding along the axial direction of the piston cylinder, a movable rod is fixed to the side wall of the piston disc, and a movable plate is fixed to the end of the movable rod; It also includes a cylinder fixed to the fixed plate and used to drive the movable plate to move axially along the movable rod, and a circulation component is provided on the piston cylinder; The circulation assembly includes a first absorption tube and a second absorption tube connected to the piston cylinder and the reaction tank body, and used to absorb the solution in the reaction tank body into the piston cylinder; The circulation assembly further includes a first convection pipe and a second convection pipe connected to the piston cylinder and the reaction tank body, for guiding the solution in the piston cylinder to perform a hedging action; A pressure control mechanism is disposed in the piston cylinder, and a driving mechanism connected to the pressure control mechanism is disposed on the fixed plate. The driving mechanism is capable of continuously adjusting the pumping pressure of the reflux counteraction mechanism through the pressure control mechanism when the reflux counteraction mechanism moves, so as to perform a mixing action on the solvent; The pressure control mechanism includes a first movable sleeve and a second movable sleeve slidably mounted at both ends of the piston cylinder, a first push plate being fixed to the end of the first movable sleeve, and a second push plate being fixed to the end of the second movable sleeve, and the first push plate and the second push plate being able to slide axially along the piston cylinder; The pressure control mechanism also includes a first limiting wheel and a second limiting wheel fixed on the first movable sleeve and the second movable sleeve respectively. The first movable sleeve and the second movable sleeve are respectively provided with a first spring and a second spring. The two ends of the first spring are respectively in contact with the first limiting wheel and the piston cylinder, and the two ends of the second spring are respectively in contact with the second limiting wheel and the piston cylinder.

2. The reactor based on multi-layer convection collision according to claim 1, characterized in that: The driving mechanism includes a second motor fixed on the fixing plate, and a rotating rod connected to the output shaft of the second motor is rotatably mounted on the fixing plate.

3. The reactor based on multi-layer convection collision according to claim 2, characterized in that: The driving mechanism also includes a first rotating disk and a second rotating disk fixed on both sides of the rotating rod, the first rotating disk is fixed with a first guide ring that interferes with the first limiting wheel, and the second rotating disk is fixed with a second guide ring that interferes with the second limiting wheel.

4. The reactor based on multi-layer convection collision according to claim 1, characterized in that: A first motor is fixed at the bottom of the reaction tank body, a transmission rod connected to the output shaft of the first motor is rotatably installed in the reaction tank body, and stirring blades equidistantly distributed around the circumference are fixed on the transmission rod.

5. A multi-layer convection collision method, using the multi-layer convection collision based reactor according to any one of claims 1 to 4, characterized in that: The following steps are involved: Step 1: Deliver the required solvent into the reaction tank through two feeding pipes, and control the impact of the solvents on each other; Step 2: The reflux hedging mechanism works and draws the solution in the reaction tank into the piston cylinder, and then controls the solution in the piston cylinder to impact and flow back into the reaction tank; Step 3: Under the action of the driving mechanism, the movement of the pressure control mechanism is controlled to continuously adjust the pressure in the piston cylinder so that the pressure of the solution pumped by the reflux counteraction mechanism continuously changes.

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