Shear type polymer microsphere production device and production method

Abstract

The invention relates to the technical field of polymer preparation, in particular to a shear type polymer microsphere production device and a production method.The shear type polymer microsphere production device comprises a reaction tower, first liquid is contained in the reaction tower, at least one liquid spraying pipe is arranged at the bottom of the reaction tower, the liquid spraying pipe comprises an inlet and an outlet, and the inlet is communicated with a liquid supply pipe and used for conveying second liquid into the liquid spraying pipe; the outlet points into the reaction tower and is provided with a nozzle; the shearing device comprises a driving mechanism, a driving shaft and a supporting arm arranged on the driving shaft, the driving shaft penetrates through the bottom of the reaction tower, the upper end of the driving shaft extends into the reaction tower, the lower end of the driving shaft extends out of the reaction tower and is connected with the driving mechanism, the cutting blade is arranged on the driving shaft, and the position of the cutting blade is higher than that of the nozzle. The jet flow is cut by the slices to form regular liquid drops, and the liquid in the reaction tower is not disturbed, so that the polymer microspheres which are small in particle size and uniform and controllable in particle size distribution can be produced.

Description

Technical Field

[0001] This invention relates to the field of polymer preparation technology, and in particular to a shear-type polymer microsphere production apparatus and production method. Background Technology

[0002] Ion exchange resins are functional resins that are widely used in industrial water treatment, petrochemicals, power, metallurgy, pharmaceuticals, food and other industrial production and research fields, and their application areas are constantly expanding.

[0003] The particle size of ion exchange resins is determined by the particle size of their polymer microspheres. Currently, the main methods for preparing ion exchange resin polymer microspheres are suspension polymerization and spray dispersion polymerization. Spray dispersion polymerization involves spraying a polymerizable monomer mixture to form monomer microparticles. The reaction liquid for the polymerization reaction is sprayed into a reaction tower containing a continuous liquid phase (containing a suspension stabilizer). Partial polymerization occurs in the tower to form monomer microparticles, which continue to participate in the subsequent polymerization reaction.

[0004] Patent CN203577787U discloses a device for preparing polymer microspheres in ion exchange resin. Through the excitation of a vibration exciter, the piston rod and piston reciprocate with a large amplitude, causing the monomer to form a monomer jet that enters the tower through a perforated plate and reacts with the continuous phase in the tower. Although it can produce high-quality polymer microspheres, the up-and-down vibration of the piston rod and piston causes significant disturbance to the monomer in the monomer reservoir and even the continuous phase in the tower, resulting in uneven particle size distribution of the prepared polymer microspheres. Patent CN214973911U discloses an ascending suspension polymerization device, characterized by allowing the dispersed phase to flow through a perforated plate to prepare droplet-shaped monomers. However, due to the different distances between the through-holes on the perforated plate and the first delivery pipe, the particle size of the prepared droplet-shaped monomers is also difficult to be uniform.

[0005] In addition, although the existing spray dispersion polymerization reduces the particle size of the produced monomer microparticles, the production equipment in the existing technology is prone to causing large disturbances to the liquid, resulting in a large particle size distribution of the produced microparticles, so that most of the polymer microspheres do not meet the requirements.

[0006] The inventors previously proposed a polymer microsphere production device and method, specifically as detailed in patent CN114082376B. This method uses a nozzle impact mechanism to strike the nozzles, causing slight radial vibration and thus interrupting the liquid flow. Practical application has shown that this method produces better polymer microspheres than traditional chemical polymerization methods, and it is easier to control the uniformity of microsphere particle size. However, some drawbacks have been observed in practical use: First, after a period of use, the impact rods within the equipment tend to shift differently, resulting in varying impact forces and affecting the uniformity of polymer microsphere particle size. In cases where adjustments cannot be made for an extended period, some nozzles may even fail to vibrate, thus preventing flow interruption. Second, the movement of the impact rods and the vibration of the nozzles still cause significant disturbance to the liquid near the nozzles within the reaction tower, leading to uneven polymer microsphere particle size. Third, the reciprocating impact of numerous impact rods through the reaction tower makes sealing difficult. Summary of the Invention

[0007] To address the aforementioned technical problems in the prior art, this invention provides a shear-type polymer microsphere production apparatus and production method.

[0008] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: A first aspect of the present invention provides a shear-type polymer microsphere production apparatus, comprising a reaction tower containing a first liquid, a plurality of circumferentially distributed spray pipes at the bottom of the reaction tower, each spray pipe having an inlet and an outlet, the inlet of the spray pipe communicating with a supply pipe for supplying a second liquid into the spray pipe, the outlet of the spray pipe pointing into the reaction tower, and the outlet of the spray pipe having a nozzle; further comprising a shearing device, the shearing device comprising a drive mechanism, a drive shaft, and support arms mounted on the drive shaft, the drive shaft passing through the bottom of the reaction tower, the upper end of the drive shaft extending into the interior of the reaction tower, the lower end of the drive shaft extending to the exterior of the reaction tower and connected to the drive mechanism, a seal between the drive shaft and the tower wall of the reaction tower, a plurality of radially extending support arms evenly distributed circumferentially on the drive shaft, the ends of the support arms having slices located 0.5-10 mm above the nozzles; the drive mechanism being used to drive the slices to cut off the flow of the second liquid sprayed from the nozzles.

[0009] The shear-type polymer microsphere production device provided by this invention forms regular droplets by cutting the jet stream sprayed through the nozzle of the spray pipe through each slice, without causing significant disturbance to the liquid in the reaction tower, thus avoiding the problem of uneven polymer microsphere particle size. It can produce polymer microspheres with small particle size and uniform and controllable particle size distribution.

[0010] Based on the above technical solution, the present invention can also be improved as follows: Furthermore, it also includes a liquid supply mechanism, which includes a material tank and a metering pump. The material tank is connected to the inlet of the spray pipe through the liquid supply pipe, and the metering pump is located at one end of the liquid supply pipe near the material tank and is connected to the liquid supply pipe.

[0011] The beneficial effect of adopting the above-mentioned further technical solution is that the liquid supply mechanism, which includes a material tank and a metering pump, can stably and accurately deliver the second liquid to the spray pipe.

[0012] Furthermore, the drive mechanism includes a driven gear, a driving gear, and a servo motor connected to the driving gear, all mounted on the lower end of the drive shaft.

[0013] The beneficial effects of adopting the above-mentioned further technical solution are as follows: the drive shaft and the slices are driven to rotate by a servo motor, a drive gear, and a driven gear, thereby achieving regular cutting of the jet stream during the slice rotation to form uniform droplets. To reduce disturbance to the liquid flow inside the tower, the drive shaft speed can be slowed down, and more slices can be added.

[0014] Furthermore, the drive mechanism includes a rocker arm, a connecting rod, and a rocker arm mounted on the lower end of the drive shaft, and the rocker arm is connected to a servo motor.

[0015] The beneficial effects of adopting the above-mentioned further technical solution are as follows: the swing mechanism, composed of a swing arm, a connecting rod, and a rocker arm, drives the drive shaft to rotate reciprocally, thereby realizing the swinging of the support arm and slice mounted on the drive shaft. This driving method can also achieve the sequential cutting of each jet stream to form regular droplets. Moreover, since the stroke of the support arm and slice is very short, it minimizes disturbance to the liquid in the reaction tower.

[0016] Furthermore, the number of slices is an integer multiple of the number of nozzles, and the thickness of the slices is 0.1 to 0.2 mm.

[0017] The beneficial effect of adopting the above-mentioned further technical solution is that when the number of slices is relatively large, the drive shaft can rotate slowly, thereby reducing disturbance to the liquid.

[0018] Furthermore, it also includes a mounting frame, which is located below the reaction tower. The mounting frame is equipped with a spray ring, which is connected to the spray pipe. The drive shaft is connected to the mounting frame via a bearing.

[0019] Furthermore, an alignment rod is provided outside the drive shaft, which is arranged parallel to one of the support arms and is used to indicate the position of the support arm.

[0020] Another aspect of the present invention is to provide a method for producing polymer microspheres, employing the above-described shear-type polymer microsphere production apparatus, comprising the following steps: Step 1: The second liquid is delivered to the nozzle via the supply pipe and the spray pipe, and a continuous jet stream is sprayed from the nozzle; Step 2: The driving mechanism drives the driving shaft to rotate the slice, and the slice cuts the jet stream into discontinuous particles; Step 3: The microparticles react with the first liquid in the reaction tower to form the polymer microspheres.

[0021] Furthermore, the time interval between the slice cutting the jet stream is 0.5-5 seconds.

[0022] Furthermore, the shearing device can rotate continuously or oscillate back and forth; when oscillating back and forth, the oscillation amplitude of the slice is 8°-25°. The beneficial effect of adopting the above-mentioned further technical solution is that: the reciprocating oscillation of the slice with an amplitude of 8°-25° can reduce the disturbance to the liquid.

[0023] Compared with the prior art, the present invention has the following technical effects: The shearing polymer microsphere production device provided by the present invention cuts the jet stream sprayed through the nozzle of the spray pipe by slicing, thereby forming intermittent microparticles. It achieves the interception of the liquid stream sprayed from the nozzle to form regular droplets, and does not cause significant disturbance to the liquid in the reaction tower. It avoids the problem of uneven polymer microsphere particle size and can produce polymer microspheres with small particle size and uniform and controllable particle size distribution. A slice is placed above the nozzle. During continuous rotation or reciprocating oscillation, the slice cuts each jet stream, reducing disturbance to the liquid in the reaction tower and minimizing the impact of excessively high rotation speed of the drive shaft and the slice on the liquid disturbance. Thinner slices are used to reduce disturbance to the liquid inside the reaction tower while ensuring the cutting effect; The apparatus and method of the present invention can produce polymer microspheres with a particle size of 0.3-2.0 mm. The final product can achieve a target particle size within ±0.05 mm without sieving or other post-processing. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the shear-type polymer microsphere production device according to Embodiment 1 of the present invention; Figure 2 For the present invention Figure 1 A partial front view; Figure 3 For the present invention Figure 2 Sectional view along axis AA; Figure 4 This is a schematic diagram of the shearing structure of the shearing polymer microsphere production device of the present invention; Figure 5 This is a schematic diagram of the shear-type polymer microsphere production device according to Embodiment 2 of the present invention; Figure 6 This is a schematic diagram of the shear-type polymer microsphere production device according to Embodiment 3 of the present invention; Figure 7 This is a schematic diagram of the shear-type polymer microsphere production device according to Embodiment 4 of the present invention; Figure 8 This is a diagram of the polymer microsphere production system of the present invention; Figure 9 This is a flow chart of the polymer microsphere production process according to an embodiment of the present invention.

[0025] Figure label: 1. Reaction tower; 2. Spray pipe; 3. Supply pipe; 4. Nozzle; 5. Drive shaft; 6. Slice; 7. Material tank; 8. Driven gear; 9. Drive gear; 10. Servo motor; 11. Swing arm; 12. Connecting rod; 13. Rocker arm; 14. Mounting bracket; 15. Spray ring; 16. Alignment rod; 17. Support arm; 18. Anti-disturbance tank; 19. Circulation pump; 20. First pipeline; 21. Second pipeline; 22. Solid-liquid separation tank; 23. Filter head. Detailed Implementation

[0026] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Although the description of the present invention is presented in conjunction with preferred embodiments, this does not mean that the features of the invention are limited to these embodiments. On the contrary, the purpose of describing the invention in conjunction with embodiments is to cover other options or modifications that may be derived based on the claims of the present invention. To provide a deep understanding of the invention, many specific details will be included in the following description. The invention may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of the invention, some specific details will be omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0027] Example 1 See Figure 1-4As shown, a shearing polymer microsphere production device includes a reaction tower 1 containing a first liquid. The bottom of the reaction tower 1 is provided with a plurality of circumferentially distributed spray pipes 2, each spray pipe 2 having an inlet and an outlet. The inlet of each spray pipe 2 is connected to a supply pipe 3, which is used to supply a second liquid into the spray pipe 2. The outlet of each spray pipe 2 points into the reaction tower 1 and is provided with a nozzle 4. The device also includes a shearing device comprising a drive mechanism, a drive shaft 5, and a support arm 17 mounted on the drive shaft 5. The drive shaft 5 passes through… Passing through the bottom of the reaction tower 1, the upper end of the drive shaft 5 extends into the interior of the reaction tower 1, and the lower end of the drive shaft 5 extends to the exterior of the reaction tower 1 and is connected to the drive mechanism. A seal is provided between the drive shaft 5 and the tower wall of the reaction tower 1. The drive shaft 5 has multiple radially extending support arms 17 evenly distributed along its circumference. The end of each support arm 17 is provided with a slice 6. The slice 6 is located above the nozzle 4, and the height of the slice 6 is 0.5-10 mm above the nozzle 4. The drive mechanism is used to drive the slice 6 to cut off the flow of the second liquid sprayed from the nozzle 4. It also includes a liquid supply mechanism, which includes a material tank 7 and a metering pump. The material tank 7 is connected to the inlet of the spray pipe 2 through the liquid supply pipe 3. The metering pump is located at one end of the liquid supply pipe 3 near the material tank 7 and is connected to the liquid supply pipe 3. The driving mechanism is a servo motor 10. It also includes a mounting bracket 14, which is located below the reaction tower 1 and is used to mount the spray pipe 2 and the drive shaft 5. The slice 6 is located 0.1-50 mm above the nozzle 4.

[0028] In this embodiment, the drive mechanism includes a driven gear 8, a driving gear 9, and a servo motor 10 connected to the driving gear 9, all mounted on the lower end of the drive shaft 5. The servo motor 10 is connected to the driving gear 9, and the driven gear 8 is mounted on the drive shaft 5, meshing with the driving gear 9. After the servo motor 10 is started, it can drive the drive shaft 5 to rotate 360 ​​degrees around its axis.

[0029] An alignment rod 16 is also provided outside the drive shaft 5. The alignment rod 16 is arranged parallel to one of the support arms 17 and is used to indicate the position of the support arm 17.

[0030] In the production of ion exchange resins, polymer microspheres are formed by the suspension copolymerization of styrene and divinylbenzene monomers in an aqueous phase under the initiation of benzoyl peroxide. The first liquid consists of a continuous aqueous phase—deionized water, a dispersant, and methylene blue. The second liquid is an oil phase composed of an initiator, styrene, and divinylbenzene, with a lower density than the aqueous phase. The second liquid is sprayed from nozzle 4 and moves upwards along the reaction tower 1 within the first liquid, reacting with it.

[0031] The method for producing polymer microspheres using the shear-type polymer microsphere production apparatus of this embodiment specifically includes the following steps: Step 1: Turn on the metering pump. The second liquid, composed of initiator, styrene and divinylbenzene, is delivered to the nozzle 4 through the supply pipe 3 and the spray pipe 2. The nozzle 4 sprays a continuous jet stream. During this process, the flow rate of the second liquid in the supply pipe 3 and the flow velocity at the nozzle 4 nozzle orifice are controlled by the metering pump. Step 2: Activate the drive mechanism. The drive mechanism drives the drive shaft to rotate 5360°, thereby causing the slice 6 to rotate. The slice 6 cuts the jet stream into intermittent particles. The time interval between the slice 6 cutting the jet stream is 0.5-5 seconds. The slice 6 rotates continuously. Step 3: The microparticles react with the first liquid in the reaction tower 1 to form polymer microspheres. Specifically, after the uniform droplets enter the reaction tower 1, they continue to move upward in the reaction tower 1 under the action of initial velocity and buoyancy and react with the first liquid in the reaction tower 1, which is composed of pure water, dispersant and methylene blue, to form polymer microspheres.

[0032] The preparation principle of this invention is as follows: Figure 8As shown, the polymer microsphere production system includes the shear-type polymer microsphere production device and a disturbance-proof tank 18 connected to the reaction tower 1. The reaction tower 1 extends into the disturbance-proof tank 18, and the inner diameter of the disturbance-proof tank 18 is larger than the inner diameter of the reaction tower 1. The reaction tower 1 is connected to the inlet of the solid-liquid separation tank 22 through a first pipeline 20. The solid-liquid separation tank 22 is pre-filled with the same first liquid as the reaction tower 1. The outlet of the solid-liquid separation tank 22 is connected to a circulation pump 19 and connected to the disturbance-proof tank 18 through a second pipeline 21. A filter head 23 is provided at the end of the second pipeline 21 connected to the solid-liquid separation tank 22 to prevent polymer microspheres from being sucked into the second pipeline 21. The polymer microspheres formed in the reaction tower 1 are drawn into the solid-liquid separation tank 22 along with the liquid due to the suction of the circulation pump 19. After filtration and separation, the polymer microspheres are retained in the solid-liquid separation tank 22, while the liquid is transported to the anti-disturbance tank 18 via the second pipeline 21. After one process cycle, the produced polymer microspheres are collected from the solid-liquid separation tank 22. Since the top of the reaction tower 1 extends into the anti-disturbance tank 18 to form an annular barrier, when the liquid is pumped back into the anti-disturbance tank 18, the liquid impacts the outer wall of the reaction tower 1 located inside the anti-disturbance tank 18, preventing the liquid from directly entering the reaction tower 1 and causing disturbance to the liquid inside the reaction tower 1. As the amount of liquid in the anti-disturbance tank 18 increases, the liquid returns from the anti-disturbance tank 18 to the reaction tower 1. Throughout the process, the liquid level in the reaction tower 1 remains unchanged.

[0033] The process flow for producing polymer microspheres using the polymer microsphere production apparatus of the present invention is as follows: Figure 9 The specific process is as follows: First, the metering pump is turned on, allowing the second liquid, composed of initiator, styrene, and divinylbenzene, to flow from the material tank 7 through the liquid supply pipe 3 into the spray pipe 2, and then be sprayed out through the nozzle 4. The flow rate of the second liquid in the liquid supply pipe 3 and the flow velocity at the nozzle orifice are controlled by the metering pump. At the same time, the shearing device is turned on to cut off the liquid flow from the nozzle through the shearing device, forming uniform droplets. After the uniform droplets enter the reaction tower 1, under the action of the initial velocity and buoyancy, they continue to move upward in the reaction tower 1 and react with the first liquid, composed of pure water, dispersant, and methylene blue, in the reaction tower 1 to form polymer microspheres. The polymer microspheres are then separated into solid and liquid to obtain polymer microspheres with uniform particle size distribution. Example 2 See Figure 5Unlike Embodiment 1, in this embodiment, the driving mechanism includes a swing arm 11, a connecting rod 12, and a rocker arm 13 mounted on the lower end of the drive shaft 5. The rocker arm 13 is fixedly connected to the output shaft of the servo motor 10. The lower end of the drive shaft 5 is fixedly connected to one end of the swing arm 11, and the other end of the swing arm 11 is hinged to the connecting rod 12. The connecting rod 12 is hinged to one end of the rocker arm. When the servo motor 10 is started, the drive shaft 5 is driven to swing through the transmission of the swing arm 11, the connecting rod 12, and the rocker arm 13, thereby causing the support arm 17, which extends radially on the drive shaft 5, to swing within a range of 8°-25°.

[0034] The remaining parts of the shear-type polymer microsphere production apparatus in this embodiment are the same as those in Embodiment 1, and will not be described again here.

[0035] The method for producing polymer microspheres using the shear-type polymer microsphere production apparatus of this embodiment specifically includes the following steps: Step 1: Turn on the metering pump. The second liquid, composed of initiator, styrene and divinylbenzene, is delivered to the nozzle 4 through the supply pipe 3 and the spray pipe 2. The nozzle 4 sprays a continuous jet stream. During this process, the flow rate of the second liquid in the supply pipe 3 and the flow velocity at the nozzle 4 nozzle orifice are controlled by the metering pump. Step 2: Activate the drive mechanism. The drive mechanism drives the drive shaft 5 to rotate the slice 6. The slice 6 cuts the jet stream into intermittent particles. The time interval between the slice 6 cutting the jet stream is 0.5-5 seconds. The movement mode of the slice 6 is reciprocating oscillation. During the reciprocating oscillation, the oscillation amplitude of the slice 6 is 8°-25°. Step 3: The microparticles react with the first liquid in the reaction tower 1 to form polymer microspheres. Specifically, after the uniform droplets enter the reaction tower 1, they move upward in the reaction tower 1 under the action of initial velocity and buoyancy and react with the first liquid in the reaction tower 1, which is composed of pure water, dispersant and methylene blue, to form polymer microspheres.

[0036] Example 3 See Figure 6 Unlike Embodiment 1, this embodiment also includes a mounting frame 14, which is located below the reaction tower 1. The mounting frame 14 is equipped with a spray ring 15, which is connected to the spray pipe 2. The drive shaft 5 is connected to the mounting frame 14 via a bearing.

[0037] Example 4 See Figure 7Unlike Embodiment 1, in this embodiment, the spray pipe 2 is arranged in a multi-ring concentric circle array. On each concentric circle, the spray pipe 2 is distributed at equal angular intervals, and the support arm 17 is also provided with multiple rings of slices 6.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A shear-type polymer microsphere production apparatus, comprising a reaction tower (1), wherein the reaction tower (1) is filled with a first liquid, characterized in that, The bottom of the reaction tower (1) is provided with a plurality of circumferentially distributed spray pipes (2). Each spray pipe (2) includes an inlet and an outlet. The inlet of the spray pipe (2) is connected to a supply pipe (3). The supply pipe (3) is used to deliver a second liquid into the spray pipe (2). The outlet of the spray pipe (2) points into the reaction tower (1). The outlet of the spray pipe (2) is provided with a nozzle (4). The reaction tower (1) also includes a shearing device. The shearing device includes a drive mechanism, a drive shaft (5), and a support arm (17) mounted on the drive shaft (5). (5) Passing through the bottom of the reaction tower (1), the upper end of the drive shaft (5) extends into the interior of the reaction tower (1), and the lower end of the drive shaft (5) extends to the outside of the reaction tower (1) and is connected to the drive mechanism. A seal is provided between the drive shaft (5) and the tower wall of the reaction tower (1). The drive shaft (5) is evenly distributed with multiple radially extending support arms (17) along the circumference. The end of the support arm (17) is provided with a slice (6). The slice (6) is located 0.5-10 mm above the nozzle (4). The drive mechanism is used to drive the slice (6) to interrupt the flow of the second liquid ejected from the nozzle (4).

2. The shear-type polymer microsphere production apparatus according to claim 1, characterized in that, It also includes a liquid supply mechanism, which includes a material tank (7) and a metering pump. The material tank (7) is connected to the inlet of the spray pipe (2) through the liquid supply pipe (3). The metering pump is located at one end of the liquid supply pipe (3) near the material tank (7) and is connected to the liquid supply pipe (3).

3. The shear-type polymer microsphere production apparatus according to claim 1 or 2, characterized in that, The drive mechanism includes a driven gear (8), a driving gear (9) mounted on the lower end of the drive shaft (5), and a servo motor (10) connected to the driving gear (9).

4. The shear-type polymer microsphere production apparatus according to claim 1 or 2, characterized in that, The drive mechanism includes a rocker arm (11), a connecting rod (12), and a rocker arm (13) mounted on the lower end of the drive shaft (5), and the rocker arm (13) is connected to the servo motor (10).

5. The shear-type polymer microsphere production apparatus according to claim 1 or 2, characterized in that, The number of slices (6) is an integer multiple of the number of nozzles (4), and the thickness of the slices (6) is 0.1 to 0.2 mm.

6. The shear-type polymer microsphere production apparatus according to claim 5, characterized in that, It also includes a mounting bracket (14), which is located below the reaction tower (1). The mounting bracket (14) is equipped with a spray ring (15), which is connected to the spray pipe (2). The drive shaft (5) is connected to the mounting bracket (14) through a bearing.

7. The shear-type polymer microsphere production apparatus according to claim 1 or 2, characterized in that, An alignment rod (16) is provided outside the drive shaft (5), which is arranged parallel to one of the support arms (17) and is used to indicate the position of the support arm (17).

8. A method for producing polymer microspheres, characterized in that, The shear-type polymer microsphere production apparatus according to any one of claims 1-7 comprises the following steps: Step 1: The second liquid is transported to the nozzle (4) via the supply pipe (3) and the spray pipe (2), and a continuous jet stream is sprayed from the nozzle (4); Step 2: The driving mechanism drives the driving shaft (5) to rotate the slice (6), and the slice (6) cuts the jet stream into discontinuous particles; Step 3: The microparticles react with the first liquid in the reaction tower (1) to form polymer microspheres.

9. The method for producing polymer microspheres as described in claim 8, characterized in that, The time interval for the slice (6) to cut the jet stream is 0.5-5 seconds.

10. The method for producing polymer microspheres as described in claim 9, characterized in that, The shearing device is either continuously rotating or reciprocating. When reciprocating, the swing amplitude of the slice (6) is 8°-25°.

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