Reaction kettle based on multi-layer convection collision and multi-layer convection collision method

Abstract

The invention relates to the technical field of mixing preparation, in particular to a reaction kettle based on multi-layer convection collision and a multi-layer convection collision method.The reaction kettle comprises a support, a reaction tank body and a fixing plate, the reaction tank body and the fixing plate are fixed to the support, and piston cylinders which are symmetrically arranged are further fixed to the support; the feeding pipes are connected to the side wall of the reaction tank body and are symmetrically arranged; the backflow hedging mechanism is arranged on the fixed plate, is connected with the piston cylinder and is used for controlling circulating impact of a solution in the reaction tank body; the pressure intensity adjusting and controlling mechanism is arranged in the piston cylinder, a driving mechanism connected with the pressure intensity adjusting and controlling mechanism is arranged on the fixing plate, and the driving mechanism can continuously adjust the pumping pressure of the backflow hedging mechanism through the pressure intensity adjusting and controlling mechanism when the backflow hedging mechanism moves so as to perform mixing action on a solvent. Unstable turbulence is induced by controlling the solution to cyclically hedge under different pressures, so that the optimal solution mixing effect is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of mixing preparation, and specifically relates to a reaction kettle based on multi-layer convection collision and a multi-layer convection collision method. Background Art

[0002] When preparing ethyl 3-(cyclopropylamino)-2-(2,4-dichloro-5-fluorobenzoyl)acrylate, it is mainly achieved by the mutual mixing reaction between raw material solutions and maintaining the temperature required for the reaction.

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

[0004] Therefore, it is necessary to fully mix the solution during the reaction. The existing mixing is mainly achieved by mechanical stirring. If a sufficient mixing effect is to be achieved, a relatively high stirring rate is required. However, high-speed stirring may break sensitive intermediates or cause emulsification, and even damage the molecular structure of the reactants, resulting in a wrong reaction direction. In this regard, the mixing can be achieved by controlling the constant-pressure counterflow between the solutions. Constant-pressure counterflow mixing can quickly mix the two solutions in a short time, form a turbulent flow, increase the collision frequency between the reactants, thereby improving the reaction rate and reaction efficiency. However, during the constant-pressure counterflow process, the turbulent intensity in the fluid collision area will tend to be stable, resulting in the shear force and the droplet breakup efficiency reaching the upper limit and being difficult to further improve, and it is easy to have the accumulation of the boundary layer of the steady flow, resulting in local concentration balance and droplet reaggregation problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a reaction kettle based on multi-layer convection collision and a multi-layer convection collision method to solve the problems proposed in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solutions: A reaction kettle based on multi-layer convection collision, comprising: A bracket, as well as a reaction tank body and a fixing plate fixed on the bracket. A piston cylinder symmetrically arranged is also fixed on the bracket; It further includes: Inlet pipes, which are connected to the side wall of the reaction tank body and are symmetrically arranged, and are used to control the solvents to counterflow horizontally to each other; A reflux impact mechanism, which is arranged on the fixed plate and connected to the piston cylinder, and is used to control the circulation impact of the solution in the reaction tank; The 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 hedging mechanism moves, the driving mechanism can continuously adjust the pumping pressure of the reflux hedging mechanism through the pressure control mechanism to perform a mixing action on the solvent.

[0007] 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.

[0008] 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 sleeved 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.

[0009] 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.

[0010] 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 cooperates with the first limiting wheel, and the second rotating disk is fixed with a second guide ring that cooperates with the second limiting wheel.

[0011] As a further solution of the present invention: the backflow counteracting mechanism comprises 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 on the fixed plate and used for driving the movable plate to move axially along the movable rod, and a circulation component is arranged on the piston cylinder.

[0012] 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.

[0013] As a further solution of the present invention: The circulation assembly further includes a first convection tube and a second convection tube connected between the piston cylinder and the reaction tank body for guiding the solution in the piston cylinder to perform a counterflush action.

[0014] As a further solution of the present invention: 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 are fixed on the transmission rod and distributed equidistantly in a circle.

[0015] A multi-layer convection collision method includes the following steps: Step 1: Through two feed pipes, the required solvents are transported into the reaction tank body, and the solvents are controlled to impact each other. Step 2: The reflux counterflush mechanism works, sucks the solution in the reaction tank body into the piston cylinder, and then controls the solution in the piston cylinder to impact and flow back into the reaction tank body. Step 3: Under the action of the driving mechanism, the pressure regulation mechanism is controlled to move to continuously adjust the pressure in the piston cylinder, so that the pressure of the solution pumped by the reflux counterflush mechanism changes continuously.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: This application can enhance the mixing effect and reaction rate of the reaction solution through a multi-layer circulation counterflush method to ensure the smooth preparation of products. Specifically, the reaction solution can be controlled to perform a primary counterflush mixing through the feed pipes, and the solution in the reaction tank body can be controlled to circulate and perform a secondary counterflush mixing through the reflux counterflush mechanism. At the same time, under the action of the driving mechanism, the pressure regulation mechanism is controlled to work, so that the pressures of the two solutions in the secondary counterflush mixing change periodically. Under the influence of the pressure fluctuation, the mixing effect is further enhanced.

[0017] 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 during the liquid counterflush greatly increase the two-phase contact area, promoting mass transfer between the reactants. The continuous impact will cause the surface of the droplets to be continuously updated, preventing the interface from being passivated due to the accumulation of reaction products.

[0018] By rotating the first guiding ring and the second guiding ring, the periodic change of the pumping pressure in the two piston cylinders can be controlled. When the pumping pressure is relatively low, it can trigger the periodic instability of the jet boundary layer, generate standing wave vortices, refine the mixing scale, and enhance the mixing effect of the solution. At the same time, during the low-pressure half-cycle of the pressure fluctuation, a large number of cavitation bubbles will be instantaneously generated inside the liquid. The shock waves released when the bubbles collapse can accelerate the reaction. Moreover, the pressure fluctuation causes the periodic change of the thickness of the local diffusion boundary layer, and the interfacial tension fluctuation caused by the pressure change will drive the convective-diffusive coupled transport of the surfactant, thus ensuring both the full progress of the reaction and the stability of the reaction system. Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of an embodiment of a reaction kettle based on multi-layer convective collision.

[0020] Figure 2 It is a schematic structural diagram of a partial reflux and counterflush mechanism and a reaction tank body in an embodiment of a reaction kettle based on multi-layer convective collision.

[0021] Figure 3 It is a schematic connection diagram of a partial reflux and counterflush mechanism, a driving mechanism, and a pressure regulation and control mechanism in an embodiment of a reaction kettle based on multi-layer convective collision.

[0022] Figure 4 It is Figure 3 an enlarged schematic structural diagram of part A in

[0023] Figure 5 It is Figure 3 a schematic structural diagram from another angle.

[0024] Figure 6 It is a schematic cross-sectional structural diagram of a piston cylinder in an embodiment of a reaction kettle based on multi-layer convective collision.

[0025] Figure 7 It is a schematic structural diagram of a partial pressure regulation and control mechanism in an embodiment of a reaction kettle based on multi-layer convective collision.

[0026] Figure 8 It is a schematic structural diagram of a partial pressure regulation and control mechanism in an embodiment of a reaction kettle based on multi-layer convective collision.

[0027] Figure 9 It is an exploded schematic structural diagram of a partial pressure regulation and control mechanism in an embodiment of a reaction kettle based on multi-layer convective collision.

[0028] Figure 10 It is a schematic structural diagram of a first motor, a transmission rod, and a stirring blade in an embodiment of a reaction kettle based on multi-layer convective collision.

[0029] In the figure: 1, support; 2, reaction tank body; 3, feed pipe; 4, first motor; 5, transmission rod; 6, stirring blade; 7, piston cylinder; 8, first absorption pipe; 9, second absorption pipe; 10, first convection pipe; 11, second convection pipe; 12, fixed plate; 13, cylinder; 14, movable plate; 15, movable rod; 16, piston disc; 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 disc; 28, first guiding ring; 29, second rotating disc; 30, second guiding ring. Detailed implementation mode

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] In addition, an element in the present invention is referred to as being "fixed to" or "arranged on" another element, which can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation manner.

[0032] Please refer to Figures 1 to 10 , in the embodiment of the present invention, a reaction kettle based on multi-layer convection collision includes: A support 1, and a reaction tank body 2 and a fixed plate 12 fixed on the support 1. The support 1 is also fixedly provided with symmetrically arranged piston cylinders 7; It also includes: Feed pipes 3, which are connected to the side wall of the reaction tank body 2 and are symmetrically arranged, and are used to control the solvents to collide with each other in the horizontal direction; A reflux collision mechanism, which is arranged on the fixed plate 12 and is connected to the piston cylinder 7, and is used to control the cyclic impact of the solution in the reaction tank body 2; A pressure regulation mechanism, which is arranged in the piston cylinder 7. A driving mechanism connected to the pressure regulation mechanism is arranged on the fixed plate 12. The driving mechanism can continuously adjust the pumping pressure of the reflux collision mechanism through the pressure regulation mechanism when the reflux collision mechanism moves, so as to perform a mixing action on the solvents.

[0033] Specifically, when preparing ethyl 3-(cyclopropylamino)-2-(2,4-dichloro-5-fluorobenzoyl)acrylate, it is necessary to prepare the product by mixing in a homogeneous solution reaction. Therefore, the required solution for preparation can be pumped into the reaction tank 2 through two feed pipes 3 located symmetrically. The two solutions will form a convective impact, and a high shear force, turbulence, and cavitation effect will be formed in the collision area. The generated impact force will overcome the interfacial tension and break the dispersed phase into tiny droplets. At the same time, the turbulence will promote the uniform distribution at the molecular scale to enhance the solution mixing effect and accelerate the reaction rate. The impacted solution will fall into the reaction tank 2. At this time, the solution in the reaction tank 2 can be sucked into the piston cylinder 7 through the reflux impact mechanism, and the solution in the piston cylinder 7 can be pumped into the reaction tank 2 again in an impact manner. At the same time, under the action of the driving mechanism, the pressure regulation mechanism is controlled to move, so as to continuously adjust the pumping pressure provided by the reflux impact mechanism to the solution in the piston cylinder 7, so that the solutions pumped by the reflux impact mechanism collide with each other in a way that the impact pressure fluctuates continuously, thereby further enhancing the solution mixing effect.

[0034] Preferably, by controlling the primary impact of the solutions, the solutions can react quickly. By controlling the secondary impact of the solution reflux and keeping the pressure in a periodic change state, unsteady turbulence can be induced, the local concentration equilibrium can be broken, and the reaggregation of droplets can be inhibited, thereby further enhancing the mixing effect and increasing the reaction rate to ensure the smooth preparation of ethyl 3-(cyclopropylamino)-2-(2,4-dichloro-5-fluorobenzoyl)acrylate.

[0035] Please refer to Figures 1 - 3 、 Figure 5 The reflux impact mechanism includes a piston disc 16 that slides axially along the piston cylinder 7. A movable rod 15 is fixed to the side wall of the piston disc 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 for driving the movable plate 14 to move axially along the movable rod 15. A circulation component is arranged on the piston cylinder 7. The circulation component includes a first absorption pipe 8 and a second absorption pipe 9 connected between the piston cylinder 7 and the reaction tank 2 for sucking the solution in the reaction tank 2 into the piston cylinder 7. The circulation component also includes a first convection pipe 10 and a second convection pipe 11 connected between the piston cylinder 7 and the reaction tank 2 for guiding the solution in the piston cylinder 7 to perform an impact action.

[0036] It should be noted that a first one-way valve is provided at the connection between the first absorption pipe 8 and the second absorption pipe 9 and the piston cylinder 7, so that the solution can only flow into the piston cylinder 7 from the reaction tank 2 through the first absorption pipe 8 and the second absorption pipe 9. 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 into the reaction tank body 2 through the first convection tube 10 and the second convection tube 11.

[0037] Please refer to Figure 6 , specifically, the piston disk 16 divides the piston cylinder 7 into two cavities. In the initial state, under the action of the air cylinder 13, through the movable plate 14 and the movable rod 15, the piston disk 16 is located at the end of the stroke towards the reaction tank body 2. One 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 conveying pipelines of the first convection tube 10 and the second convection tube 11 converge with each other and enter the reaction tank body 2 through the same pumping port; When preparing ethyl 3-(cyclopropylamino)-2-(2,4-dichloro-5-fluoro-benzoyl)acrylate, the solution is pumped into the reaction tank body 2 through the feed pipe 3, and the solution is controlled to perform a primary countercurrent mixing. The solution after the primary mixing will fall into the reaction tank body 2. At this time, the mixing reaction effect of the solution can be further enhanced by means of circulating pumping. Specifically, under the action of the air cylinder 13, the movable rod 15 is controlled to move through the movable plate 14, so as to control the piston disk 16 to move in a direction away from the reaction tank body 2. Since neither of the two cavities of the piston cylinder 7 is filled with the solution, therefore, under the action of the piston disk 16, the air in the cavity above the piston disk 16 is pumped into the reaction tank body 2 through the first convection tube 10. At the same time, the pressure in the cavity below the piston disk 16 decreases, and under the action of negative pressure, the solution in the reaction tank body 2 is sucked into this cavity through the second absorption tube 9; Subsequently, when the piston disk 16 moves to the end of the stroke in the direction away from the reaction tank body 2, the air cylinder 13 controls the piston disk 16 to move towards the initial position. Under the action of the pressure, the solution is quickly pumped into the reaction tank body 2 through the second convection tube 11 in the relative position. The two solutions will countercurrent and impact each other, and a high shear force, turbulence and cavitation effect will be formed in the collision area, thereby further increasing the solution mixing effect and the reaction rate. At the same time, the pressure in the cavity above the piston disk 16 decreases, and the solution in the reaction tank body 2 is absorbed through the first absorption tube 8. When the piston disk 16 returns to the initial position, the above steps can be repeated to realize the cyclic countercurrent mixing treatment of the solution in the reaction tank body 2.

[0038] Preferably, by controlling the secondary countercurrent 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 countercurrent impact greatly increase the two-phase contact area, promote the mass transfer between the reactants, and the continuous impact will cause the surface of the droplets to be continuously updated, avoiding passivation of the interface due to the accumulation of reaction products.

[0039] Please refer to Figure 1 ,Figures 3 - 5 , Figures 7 - 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 along the axial direction of the piston cylinder 7. The pressure control mechanism further includes a first limit wheel 20 and a second limit wheel 24 respectively fixed on the first movable sleeve 17 and the second movable sleeve 21. First springs 19 and second springs 23 are respectively sleeved on the first movable sleeve 17 and the second movable sleeve 21. Two ends of the first spring 19 are respectively abutted against the first limit wheel 20 and the piston cylinder 7, and two ends of the second spring 23 are respectively abutted against the second limit wheel 24 and the piston cylinder 7.

[0040] Please refer to Figure 1 , Figure 3 , Figure 5 , Figure 6 , the driving mechanism includes a second motor 25 fixed on the fixing plate 12. A rotating rod 26 connected to the output shaft of the second motor 25 is rotatably mounted on the fixing plate 12. Among them, the driving mechanism further includes a first rotating disk 27 and a second rotating disk 29 fixed on both sides of the rotating rod 26. A first guiding ring 28 in abutting cooperation with the first limit wheel 20 is fixed on the first rotating disk 27, and a second guiding ring 30 in abutting cooperation with the second limit wheel 24 is fixed on the second rotating disk 29.

[0041] It should be noted that keys are fixed on the circumferential outer walls of the first movable sleeve 17 and the second movable sleeve 21, and key grooves matched with the keys are formed on the through holes provided by the piston cylinder 7 for the free sliding of the first movable sleeve 17 and the second movable sleeve 21. Under the action of the key grooves and the keys, the first movable sleeve 17 and the second movable sleeve 21 can only slide along the axial direction of the piston cylinder 7 and will not shift. The shapes and sizes of the first guiding ring 28 and the second guiding ring 30 are the same, and both are composed of three parts, namely a concave guide rail, an inclined guide rail, and a convex guide rail, and the inclined guide rails are symmetrically arranged. The first guiding ring 28 and the second guiding ring 30 are in an interleaved state, and the interleaved angle is 180°; 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 for the solution. The effective spaces in the two piston cylinders 7 are respectively defined as pumping space A and pumping space B. In the initial state, the first spring 19 is in a compressed state, causing the first limiting wheel 20 to tend to move towards the fixed plate 12. The first limiting wheel 20 associated with the pumping space A is located at the connection point of the concave 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 of the convex guide rail and the other inclined guide rail. The piston plates 16 in the two piston cylinders 7 are both at the end of the stroke in the direction away from the fixed plate 12, making the size of the pumping space A at the maximum value, and the size of the pumping space B is smaller than that of the pumping space A.

[0042] When the cylinder 13 works, the piston plate 16 can be controlled to move towards the fixed plate 12. At the same time, the second motor 25 works and drives the rotating rod 26 to rotate, thereby driving the first rotating disk 27 to rotate, causing the first guiding ring 28 to move. Therefore, the first limiting wheel 20 associated with the pumping space A moves relative to the first guiding ring 28 and moves along the trajectory of one of the inclined guide rails, thereby driving the first movable sleeve 17 to move, making the piston plate 16 and the first push plate 18 in the pumping space A move towards each other. Thus, through the double pumping method, the solution in the pumping space A is quickly transported to the reaction tank body 2 through the first convection pipe 10, and the pumping pressure is relatively large. At the same time, the first limiting wheel 20 associated with the pumping space B also moves relative to the first guiding ring 28 and moves along the trajectory of the other inclined guide rail, making the piston plate 16 and the first push plate 18 in the pumping space B move in the same direction and both move towards the fixed plate 12. Therefore, the pumping rate of the solution in the pumping space B is relatively small, and the pumping pressure is relatively small. The two solutions with different pressures pumped into the reaction tank body 2 through the first convection pipe 10 will impact each other to enhance the solution mixing effect and the reaction rate.

[0043] When the piston plate 16 moves to the end of the stroke in the direction towards the fixed plate 12, the rotating rod 26 just rotates half a turn. At this time, the cylinder 13 controls the piston plate 16 to move towards the initial position. When the piston plate 16 returns to the initial position, the rotating rod 26 rotates one turn, and the first limiting wheel 20 also returns to the initial position; Similarly, since the intersection angle between the second guiding ring 30 and the first guiding ring 28 is 180°, the space between the piston disc 16 and the second pushing disc 22 is also an effective space for solution pumping. Another effective space in the same piston cylinder 7 as the pumping space A can be named as the pumping space C, and another effective space in the same piston cylinder 7 as the pumping space B can be named as the pumping space D. The space change in the pumping space C is the same as that in the pumping space B, and the space change in the pumping space D is the same as that in the pumping space A. Therefore, when the piston disc 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, so that the two solutions pumped through the first convection tube 10 and the second convection tube 11 can be mutually opposed with periodic pressure fluctuation changes. During this process, due to the beneficial effects brought by the pressure fluctuation, the maximum pumping pressure provided to the solution does not need to be too large, thus ensuring the stability of the reaction system.

[0044] Preferably, by rotating the first guiding ring 28 and the second guiding ring 30, the periodic change of the pumping pressure in the two piston cylinders 7 can be controlled, which can trigger the periodic instability of the jet boundary layer, generate standing wave vortices, refine the mixing scale, and 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 waves released when the bubbles collapse can accelerate the reaction, and the pressure fluctuation causes the periodic change of the local diffusion boundary layer thickness. The interfacial tension fluctuation caused by the pressure change will drive the convective-diffusive coupled transport of the surfactant, thus further ensuring the full progress of the reaction.

[0045] Please refer to Figure 10 , a first motor 4 is fixed at the bottom of the reaction tank body 2, a transmission rod 5 connected to the output shaft of the first motor 4 is rotatably installed in the reaction tank body 2, and stirring blades 6 are fixed on the transmission rod 5 and distributed at equal intervals in a circumferential manner.

[0046] Furthermore, when preparing ethyl 3-(cyclopropylamino)-2-(2,4-dichloro-5-fluoro-benzoyl)acrylate, during the reaction process, a certain amount of gas will be generated. In order to avoid the gas affecting the reaction rate, it is necessary to control the gas to be discharged in time. At this time, the first motor 4 works, and drives the stirring blades 6 to rotate through the transmission rod 5 to provide a certain stirring and oscillation effect, so as to ensure that the gas can be discharged smoothly.

[0047] Among them, the rotation speed of the stirring blades 6 is relatively slow, mainly to enable the gas to separate from the reaction solution to prevent problems such as the destruction of intermediates or the initiation of emulsification due to high-speed stirring. The solution mixing reaction is mainly achieved through multi-stage cyclic counterflow, and the two cooperate with each other to ensure the smooth preparation of the product.

[0048] A multi-layer convection collision method, comprising the following steps: Step 1: Through two feed pipes 3, the required solvent is transported into the reaction tank body 2, and the solvents are controlled to impact each other; Step 2: The reflux counter-flushing mechanism operates, and the solution in the reaction tank body 2 is sucked into the piston cylinder 7, and then the solution in the piston cylinder 7 is controlled to impact and reflux into the reaction tank body 2; Step 3: Under the action of the driving mechanism, the pressure regulation mechanism is controlled to move so as to continuously adjust the pressure in the piston cylinder 7, such that the pressure of the solution pumped by the reflux counter-flushing mechanism is continuously changed.

[0049] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be regarded as limiting the claimed claim.

[0050] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments 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 fixed plate fixed on the bracket, and a piston cylinder symmetrically arranged is also fixed on the bracket; it is characterized in that it also includes: a feed pipe, connected to the side wall of the reaction tank body and symmetrically arranged, used to control the solvents to offset each other in the horizontal direction; a reflux offset mechanism, arranged on the fixed plate and connected to the piston cylinder, used to control the circulation impact of the solution in the reaction tank body; a pressure control mechanism, arranged in the piston cylinder, and a driving mechanism connected to the pressure control mechanism is arranged on the fixed plate, and the driving mechanism can continuously adjust the pumping pressure of the reflux offset mechanism through the pressure control mechanism when the reflux offset mechanism moves, so as to perform a mixing action on the solvent.

2. The reactor based on multi-layer convection collision according to claim 1, wherein 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 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.

3. The reactor based on multi-layer convection collision according to claim 2, wherein 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 a first spring and a second spring are respectively sleeved on the first movable sleeve and the second movable sleeve, 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.

4. A reactor based on multi-layer convection collision according to claim 3, characterized in that, The driving mechanism comprises a second motor fixed on the fixing plate, and a rotating rod connected to an output shaft of the second motor is rotatably mounted on the fixing plate.

5. The reactor based on multi-layer convection collision according to claim 4, wherein, 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 abuts against the first limiting wheel, and the second rotating disk is fixed with a second guide ring that abuts against the second limiting wheel.

6. The reactor based on multi-layer convective collision according to claim 1, characterized in that, The reflux offset mechanism includes a piston disk that slides axially along the piston cylinder, a movable rod is fixed to the side wall of the piston disk, 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 arranged on the piston cylinder.

7. The reactor based on multi-layer convection collision according to claim 6, characterized in that, The circulation assembly comprises 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.

8. A reactor based on multi-layer convection collision according to claim 6, characterized in that, The circulation assembly also includes a first convection tube and a second convection tube connected to the piston cylinder and the reaction tank body and used for guiding the solution in the piston cylinder to perform a counteraction action.

9. A reactor based on multi-layer convective 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.

10. A multi-layer convection collision method, which uses a reactor based on multi-layer convection collision as described in any one of claims 1-9, characterized in that, It includes the following steps: Step 1: Through two feeding pipes, the required solvents are transported into the reaction tank body, and the solvents are controlled to impact each other; Step 2: The reflux counter-pulsation mechanism works, and the solution in the reaction tank body is sucked into the piston cylinder, and then the solution in the piston cylinder is controlled to impact and reflux into the reaction tank body; Step 3: Under the action of the driving mechanism, the pressure regulation mechanism is controlled to move to continuously adjust the pressure in the piston cylinder, so that the pressure of the solution pumped by the reflux counter-pulsation mechanism is continuously changed.

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