A pre-polymer kettle wall-hanging inhibition system and method based on synergistic effect of interfacial amphiphobicity and fluid pulsation

Abstract

This invention discloses a prepolymer reactor wall adhesion suppression system and method based on the synergistic effect of interfacial dual hydrophobicity and fluid pulsation, belonging to the field of polymer reactor anti-adhesion technology. It includes: a prepolymer reactor body, with a head at the bottom and a stirring shaft inside; an interfacial dual hydrophobic coating on the inner wall of the prepolymer reactor body, the surface of the stirring shaft, and the inner surface of the head; the coating includes a bottom anchoring transition layer and an upper dual hydrophobic functional layer; a fluid pulsation generator, installed in the prepolymer reactor feed pipeline, used to introduce a periodic pulsating flow field into the reactor; and a temperature field-flow field coupling control unit, including multiple thermocouples, piezoelectric pressure sensors, and a programmable logic controller embedded in the prepolymer reactor body. This invention achieves simultaneous suppression of chemically bonded and physically deposited wall adhesion through a dual-mechanism synergistic suppression, combining interfacial dual hydrophobicity with fluid pulsation, thereby reducing wall adhesion residue and extending the reactor cleaning cycle.

Description

Technical Field

[0001] This invention relates to the field of anti-sticking technology for polymer reactors, specifically to a prepolymer reactor wall-adhesion suppression system and method based on the synergistic effect of interfacial hydrophobicity and fluid pulsation. Background Technology

[0002] In continuous bulk polymerization processes, the wall adhesion problem of the prepolymer reactor is a core bottleneck affecting the long-term operation of the equipment. Existing research shows that the formation mechanism of material wall adhesion is complex. The polymer material mainly adheres to the inner wall of the prepolymer reactor, the surface of the stirring shaft used for stirring in the prepolymer reactor, and the inner surface of the end cap at the bottom of the prepolymer reactor. On the one hand, the active free radicals in the high-viscosity polymerization system can easily initiate secondary polymerization on the metal wall surface, forming chemically bonded wall adhesion. On the other hand, the uneven distribution of the flow field in the reactor, resulting in local stagnant zones, provides conditions for the formation of physically deposited wall adhesion.

[0003] To address the aforementioned issues, existing technologies have proposed various solutions. For example, CN107345010A discloses a polystyrene reactor anti-wall coating, which uses a composite coating of polytetrafluoroethylene and nano-ceramics. Although it can reduce surface energy, the difference in thermal expansion coefficients between the coating and the substrate makes it easy to peel off at high temperatures. CN105903423A proposes a reactor with a wall scraping device, which cleans the wall adhesion periodically with a mechanical scraper. However, the gap between the scraper and the reactor wall is difficult to control precisely, and long-term operation can easily damage the surface of the reactor.

[0004] Existing technologies generally simplify the wall adhesion problem to a single factor, ignoring the multi-mechanism coupling characteristics of wall adhesion formation. Chemically bonded wall adhesion and physically deposited wall adhesion often coexist and promote each other, making it difficult for conventional methods to simultaneously suppress the mutual promotion of wall adhesion between the two types of materials. In addition, existing coating technologies still lack long-term stability under high temperature and high shear conditions. Summary of the Invention

[0005] To address the technical problems mentioned in the background section, this invention provides a prepolymer reactor wall adhesion suppression system based on the synergistic effect of interfacial dual hydrophobicity and fluid pulsation, employing the following technical solution:

[0006] include:

[0007] The prepolymer reactor body has a head at the bottom and a stirring shaft inside. The inner wall of the prepolymer reactor body, the surface of the stirring shaft and the inner surface of the head are provided with an interfacial double-hydrophobic coating. The coating includes an anchoring transition layer at the bottom and a double-hydrophobic functional layer at the top.

[0008] A fluid pulsation generator is installed in the feed pipeline of the prepolymer reactor to introduce a periodic pulsating flow field into the reactor.

[0009] The temperature field-flow field coupling control unit includes multiple thermocouples, piezoelectric pressure sensors, and programmable logic controllers embedded in the prepolymer reactor body.

[0010] Furthermore, the interface dual-hydrophobic coating is a gradient structure coating, and its formation process includes: laser texturing treatment of the inner wall of the prepolymer reactor body, the surface of the stirring shaft and the inner surface of the end cap to form a micro-nano composite structure; sputtering deposition of a TiN / TiCN gradient transition layer with a thickness of 2-5 μm on the textured surface; spraying a fluorinated polysiloxane-nano SiO2 composite sol on the surface of the transition layer; and thermal curing to form a dual-hydrophobic functional layer with a thickness of 10-20 μm.

[0011] Furthermore, the laser texturing process uses a nanosecond pulsed laser with a laser power of 20-30W and a scanning speed of 100-200mm / s to form a micropore array with a spacing of 50-100μm and a depth of 10-20μm on the inner wall of the prepolymer reactor body, the surface of the stirring shaft, and the inner surface of the end cap.

[0012] Furthermore, the contact angle of the dual-hydrophobic functional layer with styrene monomer is ≥105°, and the peel strength of the polystyrene melt is ≤0.5N / cm.

[0013] Furthermore, the fluid pulsation generating device consists of a pulsation generator, a one-way valve assembly, and a buffer tank connected in series. The buffer tank is located at the front end of the feed pipeline to stabilize the feed flow rate. The one-way valve assembly is located between the buffer tank and the pulsation generator to prevent fluid backflow. The pulsation generator is electromagnetic or hydraulic, and its pulsation frequency is adjustable in the range of 0.1-5Hz, with a pulsation amplitude of 5%-20% of the feed flow rate.

[0014] Furthermore, embedded thermocouples are installed at different heights on the prepolymer reactor body wall, with two thermocouples evenly distributed around each height, for a total of 6-8 thermocouples. The piezoelectric pressure sensor is installed in the middle and bottom of the prepolymer reactor body wall.

[0015] Furthermore, the control strategy of the programmable logic controller is as follows: when the temperature of any temperature measuring point deviates from the set value by more than 2°C, the heating power of the corresponding area is adjusted; when the pressure pulsation amplitude is lower than the set threshold, the frequency of the pulsation generator is increased; when the pressure pulsation amplitude exceeds the set threshold, a wall-mounted warning is triggered.

[0016] Furthermore, the prepolymer reactor wall adhesion suppression method includes the following steps: (1) Substrate pretreatment: Laser texturing treatment is performed on the inner wall of the prepolymer reactor body, the stirring shaft and the end cap to form a micro-nano composite structure; (2) Gradient coating preparation: TiN / TiCN gradient transition layer is sputtered and deposited on the textured surface, and then fluorinated polysiloxane-nano SiO2 composite sol is sprayed and thermally cured to form a double hydrophobic functional layer; (3) Pulsating flow introduction: During the feeding process of the prepolymer reactor, a periodic pulsating flow is introduced into the reactor through a pulsation generator, and the pulsation frequency and amplitude are adjusted in real time according to the pressure fluctuation in the reactor; (4) Temperature-flow field coordinated control: The state inside the reactor is monitored in real time through embedded thermocouples and piezoelectric pressure sensors, and the programmable logic controller adjusts the heating power and pulsation parameters according to the preset strategy.

[0017] Furthermore, the adjustment strategy for the pulsation frequency and amplitude in step (3) is as follows: when the pressure pulsation amplitude detected by the piezoelectric pressure sensor is lower than 0.1MPa, the pulsation frequency is increased by 0.5Hz; when the pressure pulsation amplitude is higher than 0.3MPa, a wall-mounted warning is triggered.

[0018] Furthermore, the micropore array formed by the laser texturing process in step (1) has a nanoscale molten recast layer at the edge of the micropores, which is used to enhance the mechanical interlock between the coating and the prepolymer reactor body, the stirring shaft and the end cap.

[0019] The present invention has the following advantages:

[0020] 1. Dual-mechanism synergistic inhibition: Combining interfacial hydrophobicity with fluid pulsation, it achieves simultaneous inhibition of chemically bonded and physically deposited wall adhesion, reducing wall residue by more than 70% and extending the cleaning cycle to more than 60 days.

[0021] 2. Significantly improved long-term stability of the coating: Through the synergistic design of laser texturing and gradient transition layer, the bonding strength between the coating and the substrate reaches more than 25MPa. After 1000h of thermo-oxidative aging at 200℃, the contact angle retention rate is >95%, and there is no peeling phenomenon.

[0022] 3. Precise control of fluid pulsation: Based on micro-pulsation monitoring using a piezoelectric pressure sensor, closed-loop control of pulsation parameters is achieved, improving flow field uniformity by 30% and reducing the volume of stagnant areas by 40%.

[0023] 4. High reliability of intelligent early warning: The wall-mounted early warning model based on pressure pulsation characteristic parameters has an early warning accuracy of >98%, avoiding the lag of traditional temperature monitoring. Attached Figure Description

[0024] Figure 1 This is a flowchart of the prepolymer reactor wall adhesion suppression method of the present invention. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] This invention is based on the synergistic inhibition principle of chemically bonded and physically deposited wall adhesion. First, laser texturing treatment forms a micro-nano composite structure on the inner wall of the prepolymer reactor body, the surface of the stirring shaft, and the inner surface of the end cap. This increases the mechanical interlocking force between the coating and the substrate, and also traps air through the microporous structure to form an air cushion layer, reducing the solid-liquid contact area. Hereinafter, the "prepolymer reactor body, stirring shaft, and end cap" are collectively referred to as the substrate. The micro-nano composite structure created by laser texturing has a surface that is not smooth but is covered with tiny pits, micropores, and microgrooves. When the liquid (prepolymer material) comes into contact with this surface, the surface tension of the liquid prevents it from easily filling all the tiny pores. Air is trapped inside the micropores and cannot escape. Thus, an extremely thin but continuous and stable air cushion layer is formed on the solid surface, allowing the air in the micropores to escape. Source: The prepolymer reactor is empty before feeding. The micro-nano pores, pits, and grooves created by laser weaving are naturally filled with air. These pores are very small, preventing liquid from entering, and the air cannot be displaced when the material enters the prepolymer reactor. It cleverly utilizes the certain viscosity and surface tension of the prepolymer material. The "neck / small aperture" of the micro-nano structure will produce a capillary resistance effect, preventing the liquid from completely penetrating and filling the micropores. The air is locked inside the pores, forming a stable air cushion layer. In this way, when the material comes into contact with the inner wall of the prepolymer reactor body, the surface of the stirring shaft, and the inner surface of the end cap, part of it comes into contact with the substrate surface itself, and part of it can only come into contact with the air cushion layer of the substrate. The material cannot stick to the air cushion layer, so the actual contact area between the material and the substrate itself is greatly reduced, thereby reducing the phenomenon of material sticking to the substrate.

[0027] The TiN / TiCN gradient transition layer alleviates the difference in thermal expansion coefficients between the metal substrate and the organic coating, preventing high-temperature peeling. The fluorinated polysiloxane-nano SiO2 composite coating combines low surface energy and micro / nano roughness, achieving a dual hydrophobic effect on the liquid and suppressing chemically bonded adhesion. Secondly, fluid pulsation introduces periodic disturbances, disrupting boundary layer development, eliminating stagnant zones, and suppressing physically deposited adhesion. These two mechanisms work synergistically to simultaneously suppress both types of adhesion.

[0028] Please refer to Figure 1 This invention provides a prepolymer reactor wall adhesion suppression system based on the synergistic effect of interfacial dual hydrophobicity and fluid pulsation, comprising:

[0029] The prepolymer reactor body has a head at the bottom and a stirring shaft inside. The prepolymer reactor body, stirring shaft, and head are all made of metal. The inner wall of the prepolymer reactor body, the surface of the stirring shaft, and the inner surface of the head are coated with a dual-hydrophobic coating. The coating includes an anchoring transition layer at the bottom and a dual-hydrophobic functional layer at the top. The anchoring transition layer improves the coating adhesion, prevents peeling and flaking, alleviates the mismatch of thermal expansion coefficients, and prevents high-temperature cracking and peeling. It achieves both hydrophobic and oleophobic properties (dual-hydrophobic characteristics). The dual-hydrophobic functional layer ensures that the reactor wall is neither wet nor sticky with polymer melt, inhibiting wetting, adhesion, and wall adhesion from the source.

[0030] A fluid pulsation generator is installed in the feed pipeline of the prepolymer reactor to introduce a periodic pulsating flow field into the reactor.

[0031] The temperature field-flow field coupling control unit includes multiple thermocouples, piezoelectric pressure sensors, and programmable logic controllers embedded in the prepolymer reactor body.

[0032] The interface dual-repellent coating is a gradient structure coating. Its formation process includes: laser texturing treatment of the inner wall of the prepolymer reactor body, the surface of the stirring shaft and the inner surface of the end cap to form a micro-nano composite structure. The micro-nano composite structure is a composite microporous rough surface with micron-level and nano-level concave and convex concave and convex superimposed. A TiN / TiCN gradient transition layer with a thickness of 2-5μm is sputtered and deposited on the textured surface. A fluorinated polysiloxane-nano SiO2 composite sol is sprayed on the transition layer surface and thermo-cured to form a dual-repellent functional layer with a thickness of 10-20μm. The laser-textured micro-pits / micro-pores can be covered 360° by sputtering deposition, filling the grooves like "atomic-level grouting" to form a strong mechanical interlock. After the laser texturing treatment and coating, natural air enters into the micro-pits / micro-pores to form an air cushion layer. This air naturally enters before the material enters the prepolymer reactor.

[0033] Laser texturing uses a nanosecond pulsed laser with a power of 20-30W and a scanning speed of 100-200mm / s to form a micropore array with a spacing of 50-100μm and a depth of 10-20μm on the inner wall of the prepolymer reactor, the surface of the stirring shaft, and the inner surface of the end cap. By reasonably controlling the laser power and scanning speed, a regularly distributed micropore array is formed on the substrate surface. The micropore spacing is 50-100μm and the depth is 10-20μm. This can ensure the surface roughness of the substrate while stably capturing air to form an air cushion layer, reducing the contact area between the material and the wall, thereby improving the double-repellent and anti-sticking effect of the coating. This parameter range can avoid the decrease in substrate strength due to excessively deep or dense micropores, and can also prevent the micropores from being too shallow to effectively form a micro-nano composite structure.

[0034] The dual-repellent functional layer has a contact angle ≥105° with styrene monomer and a peel strength ≤0.5N / cm with polystyrene melt. Through the interfacial performance design of the dual-repellent functional layer with a contact angle of not less than 105° with styrene monomer and a peel strength of not more than 0.5N / cm with polystyrene melt, it makes it difficult for materials to wet and adhere to the surface of the reactor. Even if a small amount adheres, it is very easy to fall off, thereby effectively inhibiting material from sticking to the wall and ensuring the cleanliness of the reactor and the stable progress of the reaction.

[0035] The fluid pulsation generating device consists of a pulsation generator, a one-way valve assembly, and a buffer tank connected in series. The buffer tank is located at the front end of the feed pipeline to stabilize the feed flow rate. The one-way valve assembly is located between the buffer tank and the pulsation generator to prevent fluid backflow. The pulsation generator is electromagnetic or hydraulic, and its pulsation frequency is adjustable in the range of 0.1-5Hz. The pulsation amplitude is 5%-20% of the feed flow rate. The fluid pulsation generating device consists of a pulsation generator, a one-way valve assembly, and a buffer tank connected in series and connected to the feed pipeline of the prepolymer reactor. The buffer tank is located at the front end of the feed pipeline to stabilize the feed pressure and flow rate, preventing flow fluctuations from affecting the pulsation effect. The one-way valve group is used to block the reverse flow of fluid, preventing backflow of materials or feed into the vessel from damaging the equipment. The pulsation generator is driven by electromagnetic or hydraulic means and can generate controllable periodic pulsating flow. Its pulsation frequency is adjustable in the range of 0.1-5Hz, and the pulsation amplitude is 5%-20% of the feed flow rate. It can be flexibly adjusted according to different material characteristics and reaction conditions to achieve the best flow field disturbance effect.

[0036] Embedded thermocouples are installed at different heights on the prepolymer reactor body wall, with two thermocouples evenly distributed circumferentially at each height, for a total of 6-8 thermocouples. The piezoelectric pressure sensors are installed in the middle and bottom of the prepolymer reactor body wall. In order to monitor and precisely control the temperature and pressure distribution inside the reactor in real time, thermocouples are embedded at different heights on the prepolymer reactor body wall, with two thermocouples evenly distributed circumferentially at each height, for a total of 6-8 thermocouples. This allows for comprehensive acquisition of axial and circumferential temperature data inside the reactor. At the same time, piezoelectric pressure sensors are installed in the middle and bottom of the reactor wall to detect pressure and flow field fluctuation signals in different areas in real time, providing reliable data support for temperature and flow field coupling control.

[0037] The programmable logic controller (PLC) employs the following control strategy: when the temperature at any measuring point deviates from the set value by more than 2°C, the heating power of the corresponding area is adjusted; when the pressure pulsation amplitude is lower than the set threshold, the frequency of the pulsation generator is increased; and when the pressure pulsation amplitude exceeds the set threshold, a wall adhesion warning is triggered. The PLC adopts a temperature-pressure coordinated control strategy: by real-time acquisition of signals from thermocouples and pressure sensors, when the temperature at any measuring point deviates from the process set value by more than 2°C, the heating power of the corresponding area is automatically adjusted to maintain a uniform and stable temperature inside the reactor; when the pressure pulsation amplitude is detected to be lower than the set threshold, the frequency of the pulsation generator is automatically increased to enhance flow field disturbance; and when the pressure pulsation amplitude exceeds the set threshold, the system determines that material adhesion may occur on the wall and immediately issues a wall adhesion warning, thereby achieving coordinated intelligent control of the temperature field and flow field.

[0038] The method for inhibiting adhesion to the prepolymer reactor wall includes the following steps: (1) Substrate pretreatment: Laser texturing treatment is performed on the metal surfaces of the prepolymer reactor body, stirring shaft and end caps that come into contact with the material. The laser forms a uniform micro-nano composite uneven structure on the surface, which improves the adhesion of subsequent coatings and lays the foundation for the formation of an air cushion layer and reduces material adhesion; (2) Gradient coating preparation: TiN / TiCN is first sputtered and deposited on the laser-textured surface. The gradient transition layer is used to improve the bonding strength of the coating and adapt to high temperature conditions; then the fluorinated polysiloxane-nano SiO2 composite sol is sprayed and heated to form a dual-hydrophobic and oleophobic functional layer after curing, which effectively inhibits the adhesion of materials; (3) Pulsating flow introduction: During the feeding process of the prepolymer reactor, a controllable periodic pulsating flow is introduced into the reactor through the fluid pulsation generator, and the pulsating disturbance is used to destroy the material boundary layer and reduce the stagnant deposition on the wall; the system automatically adjusts the pulsation frequency and amplitude according to the real-time pressure fluctuation in the reactor to ensure that the wall adhesion inhibition effect is stable and reliable; (4) Temperature-flow field coordinated control: The embedded thermocouple and piezoelectric pressure sensor are used to collect the temperature, pressure and flow field information in the reactor in real time. The programmable logic controller automatically adjusts the heating power of the corresponding area and the working parameters of the pulsation generator according to the monitoring data and the preset control strategy to achieve coordinated and stable control of the temperature field and the pulsating flow field, and further improves the wall adhesion inhibition effect.

[0039] The adjustment strategy for the pulsation frequency and amplitude in step (3) is as follows: when the pressure pulsation amplitude detected by the piezoelectric pressure sensor is lower than 0.1 MPa, the pulsation frequency is increased by 0.5 Hz; when the pressure pulsation amplitude is higher than 0.3 MPa, a wall adhesion warning is triggered, and pulsation flow is introduced: during the feeding process of the prepolymer reactor, a periodic pulsation flow is introduced into the reactor through a pulsation generator to disrupt the wall boundary layer and suppress physical deposition wall adhesion. The pulsation frequency and amplitude adopt an adaptive adjustment strategy: when the pressure pulsation amplitude detected by the piezoelectric pressure sensor is lower than 0.1 MPa, it indicates that the flow field disturbance is insufficient, and the pulsation frequency is increased by 0.5 Hz to enhance the scouring effect; when the pressure pulsation amplitude is higher than 0.3 MPa, it indicates that the wall material is thickened, causing abnormal flow field, and the system automatically triggers a wall adhesion warning for timely handling.

[0040] The micropore array formed by the laser texturing process in step (1) has a nanoscale molten recast layer at the edge of the micropores, which is used to enhance the mechanical interlock between the coating and the prepolymer reactor body, stirring shaft and end cap. Substrate pretreatment: Laser texturing process is performed on the inner wall of the prepolymer reactor body, stirring shaft and end cap to form a uniformly distributed micropore array. Under the action of laser, a nanoscale molten recast layer will be formed at the edge of the micropores, which significantly improves the surface roughness and can form a tight mechanical interlock structure with the subsequent coating, effectively improving the coating adhesion and avoiding peeling under high temperature and fluid scouring.

[0041] This invention is simple to operate, convenient to use, and suitable for widespread promotion and application. Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A prepolymer reactor wall adhesion suppression system based on the synergistic effect of interfacial dual hydrophobicity and fluid pulsation, characterized in that, include: The prepolymer reactor body has a head at the bottom and a stirring shaft inside. The inner wall of the prepolymer reactor body, the surface of the stirring shaft and the inner surface of the head are provided with an interfacial double-hydrophobic coating. The coating includes an anchoring transition layer at the bottom and a double-hydrophobic functional layer at the top. A fluid pulsation generator is installed in the feed pipeline of the prepolymer reactor to introduce a periodic pulsating flow field into the reactor. The temperature field-flow field coupling control unit includes multiple thermocouples, piezoelectric pressure sensors, and programmable logic controllers embedded in the prepolymer reactor body.

2. The prepolymer reactor wall adhesion suppression system according to claim 1, characterized in that, The interface dual-hydrophobic coating is a gradient structure coating, and its formation process includes: laser texturing treatment of the inner wall of the prepolymer reactor body, the surface of the stirring shaft and the inner surface of the end cap to form a micro-nano composite structure; sputtering and depositing a TiN / TiCN gradient transition layer with a thickness of 2-5 μm on the textured surface; spraying a fluorinated polysiloxane-nano SiO2 composite sol on the surface of the transition layer; and thermally curing to form a dual-hydrophobic functional layer with a thickness of 10-20 μm.

3. The prepolymer reactor wall adhesion suppression system according to claim 2, characterized in that, The laser texturing process uses a nanosecond pulsed laser with a power of 20-30W and a scanning speed of 100-200mm / s to form a micropore array with a spacing of 50-100μm and a depth of 10-20μm on the inner wall of the prepolymer reactor, the surface of the stirring shaft, and the inner surface of the end cap.

4. The prepolymer reactor wall adhesion suppression system according to claim 1, characterized in that, The contact angle of the dual-hydrophobic functional layer with styrene monomer is ≥105°, and the peel strength of the polystyrene melt is ≤0.5N / cm.

5. The prepolymer reactor wall adhesion suppression system according to claim 1, characterized in that, The fluid pulsation generating device consists of a pulsation generator, a one-way valve assembly, and a buffer tank connected in series. The buffer tank is located at the front end of the feed pipeline to stabilize the feed flow rate. The one-way valve assembly is located between the buffer tank and the pulsation generator to prevent fluid backflow. The pulsation generator is electromagnetic or hydraulic, and its pulsation frequency is adjustable in the range of 0.1-5Hz. The pulsation amplitude is 5%-20% of the feed flow rate.

6. The prepolymer reactor wall adhesion suppression system according to claim 1, characterized in that, The embedded thermocouples are installed at different heights on the prepolymer reactor body wall, with two evenly distributed around each height, for a total of 6-8. The piezoelectric pressure sensors are installed in the middle and bottom of the prepolymer reactor body wall.

7. The prepolymer reactor wall adhesion suppression system according to claim 1, characterized in that, The control strategy of the programmable logic controller is as follows: when the temperature of any temperature measuring point deviates from the set value by more than 2°C, the heating power of the corresponding area is adjusted; when the pressure pulsation amplitude is lower than the set threshold, the frequency of the pulsation generator is increased; when the pressure pulsation amplitude exceeds the set threshold, a wall-mounted warning is triggered.

8. A method for inhibiting prepolymer residue adhesion to the reactor wall based on the system described in any one of claims 1-7, characterized in that, The process includes the following steps: (1) Substrate pretreatment: Laser texturing treatment is performed on the inner wall of the prepolymer reactor body, the stirring shaft and the end cap to form a micro-nano composite structure; (2) Gradient coating preparation: TiN / TiCN gradient transition layer is sputtered and deposited on the texturized surface, and then fluorinated polysiloxane-nano SiO2 composite sol is sprayed and thermally cured to form a double hydrophobic functional layer; (3) Pulsating flow introduction: During the feeding process of the prepolymer reactor, a periodic pulsating flow is introduced into the reactor through a pulsation generator, and the pulsation frequency and amplitude are adjusted in real time according to the pressure fluctuation in the reactor; (4) Temperature-flow field coordinated control: The state inside the reactor is monitored in real time through embedded thermocouples and piezoelectric pressure sensors, and the programmable logic controller adjusts the heating power and pulsation parameters according to the preset strategy.

9. The method for inhibiting adhesion to the prepolymer reactor wall according to claim 8, characterized in that, The adjustment strategy for the pulsation frequency and amplitude in step (3) is as follows: when the pressure pulsation amplitude detected by the piezoelectric pressure sensor is lower than 0.1MPa, the pulsation frequency is increased by 0.5Hz; when the pressure pulsation amplitude is higher than 0.3MPa, a wall-mounted warning is triggered.

10. The method for inhibiting adhesion to the prepolymer reactor wall according to claim 8, characterized in that, The micropore array formed by the laser texturing process in step (1) has a nanoscale molten recast layer at the edge of the micropores, which is used to enhance the mechanical interlock between the coating and the prepolymer reactor body, stirring shaft and end cap.

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