A preparation system and method for dynamically adjusting a nylon 6 quenching agent suspension

Abstract

The present application relates to a kind of preparation system and method of dynamically adjusting nylon 6 matting agent suspension, comprising the following steps: (1) titanium dioxide powder is temporarily stored in raw material bin equipped with anti-bridging vibration screen, the discharge speed is controlled by discharge screw, after static electricity is eliminated by particle electrostatic eliminator, it enters powder suction machine;(2) powder suction machine negative pressure inhales titanium dioxide powder, it is mixed, wetted, dispersed to form suspension with liquid circulated by double-fluid atomization spray, and enters dynamic reaction kettle;(3) after nylon 6 monomer and desalted water are mixed to form monomer aqueous solution, it is added to dynamic reaction kettle, and it is mixed, dispersed, emulsified, homogenized with the suspension in kettle, dynamic reaction kettle is equipped with three-stage high-shear emulsification homogenizer, jacket heat exchange temperature control system and intelligent detection and control module;(4) titanium dioxide suspension is conveyed to suspension storage tank by screw pump from the bottom of dynamic reaction kettle, then enters nylon 6 polymerization section after passing through automatic backwashing filter.

Description

Technical Field

[0001] This invention relates to the field of nylon 6 polymer material processing technology, specifically to a system and method for preparing dynamically formulated nylon 6 matting agent suspensions. Background Technology

[0002] In the field of nylon 6 polymer materials, titanium dioxide powder is commonly used as a matting agent because of its excellent whiteness, coloring ability and hiding power. At the same time, its physicochemical properties are stable, and it has excellent heat resistance and weather resistance. It is also friendly to humans and the environment, making it widely used in the nylon 6 chemical fiber industry.

[0003] To ensure that the produced nylon 6 synthetic fibers possess excellent tactile feel, rich colors, and durable hiding power, titanium dioxide powder requires a suitable particle size range and homogeneous dispersibility. Particles that are too large will affect the pressure instability of the spinning assembly and the feel of the finished yarn; particles that are too small will affect the extinction efficiency, and also cause dispersion difficulties and increased costs. Furthermore, due to its large specific surface area and high surface energy, titanium dioxide powder is extremely unstable; simultaneously, the intermolecular interactions and electrostatic forces make it prone to agglomeration. Therefore, homogeneous dispersibility is crucial when preparing titanium dioxide suspensions.

[0004] See appendix Figure 2 In existing technologies, in order to improve the homogeneous dispersion of titanium dioxide powder in the aqueous solution of polymer monomers, titanium dioxide powder, aqueous solution of polymer monomers, dispersant, modifier, pH adjuster and other materials are usually fed into the preparation tank in batches, dispersed by stirring, grinding or ultrasonic grinding, and then separated by natural sedimentation or screening by centrifuge, filter and other means, and finally prepared in the final preparation tank, and then temporarily stored in the finished product tank. The whole process is completed by manual preparation, sampling analysis and evaluation.

[0005] Patent CN109778331 discloses a titanium dioxide suspension for nylon polymerization and its preparation method. The method includes a first step of preparing a mixture of titanium dioxide, caprolactam aqueous solution, and a diamine modifier; and a second step of adding sodium metaphosphate dispersant to the suspension. The suspension is then further prepared by centrifugation and re-adjustment to produce the final titanium dioxide suspension. Patent CN108299678 discloses a method for preparing a titanium dioxide suspension as a matting agent for polymers. This method involves initially preparing a suspension of titanium dioxide powder and a polymer monomer or its aqueous solution in a mixer. The suspension is then separated by centrifugation. A portion of the larger-particle titanium dioxide is separated, treated with ultrasound, and then re-mixed in the mixer. The remaining qualified suspension is then transferred to a re-adjustment tank to be prepared to the required concentration for storage. Patent CN10601938 discloses a titanium dioxide suspension preparation device and method, which includes preparing the titanium dioxide suspension in a preparation tank, grinding and dispersing it with a grinding pump, then conveying it through a coarse filter to a high-level settling tank where different particle sizes are separated. The qualified upper layer of suspension enters a metering tank, while the lower layer of precipitate is returned to the preparation tank. The titanium dioxide suspension prepared in the metering tank then enters a buffer tank through a precision filter and finally enters a finished product tank. Patent CN104313722 discloses a centrifugal preparation method for titanium dioxide suspension, which includes first preparing a caprolactam aqueous solution, then preparing it with titanium dioxide powder to form a suspension, followed by multi-stage centrifugal separation of the titanium dioxide suspension, and finally filtering it before entering a titanium dioxide storage tank for later use. In this process, the filtrate from centrifugal filtration enters a titanium dioxide suspension mixing tank for further mixing (to the required concentration value). The filter residue from centrifugal filtration is pumped to a ball mill for grinding, and then mixed again with caprolactam aqueous solution to prepare a titanium dioxide suspension. Patent CN102912467 discloses a preparation process for a TiO2 matting agent for chemical fibers, which includes first stirring and mixing titanium dioxide particles with deionized water in a container reaction tank, then adding a dispersant and a pH adjuster in a certain proportion, and increasing the pressure of the reaction tank to prepare a titanium dioxide mixture.

[0006] The technologies described in the above patents have many problems, such as the inability to operate the titanium dioxide suspension preparation process continuously, a long process flow, a lack of online means for index detection, quantitative analysis and real-time control of titanium dioxide suspension, low degree of automation, frequent manual operation, high labor intensity, large footprint, many equipment, high investment and energy consumption. Summary of the Invention

[0007] To address the problems existing in the above-mentioned technologies, this invention provides a system and method for preparing dynamically formulated nylon 6 matting agent suspensions. The preparation system and method of this invention can achieve online continuous or intermittent preparation, with a short process flow. It enables real-time detection, quantitative analysis, and optimized control of titanium dioxide suspension indicators. The process is fully automated, highly efficient, and low-cost. The preparation process is environmentally friendly and human-friendly. At the same time, it achieves homogeneous dispersion and high stability of titanium dioxide suspension, meeting the index requirements for large-scale production of fully matte and semi-matte nylon 6 polymer chips.

[0008] To achieve the above-mentioned technical objectives, the present invention provides a method for preparing a dynamically formulated nylon 6 matting agent suspension, characterized by comprising the following steps:

[0009] S1, Titanium dioxide powder is temporarily stored in the titanium dioxide raw material silo. The discharge speed is controlled by the discharge screw. After the static electricity is eliminated by the particle static eliminator, it enters the powder suction machine.

[0010] S2, the powder suction machine sucks in titanium dioxide powder through a negative pressure device, mixes, wets and disperses it with the circulating dual-fluid atomized liquid to form a titanium dioxide suspension, which then enters the dynamic reaction vessel;

[0011] S3, Nylon 6 monomer and desalinated water are mixed in a static mixer to form a monomer aqueous solution and then added to a dynamic reaction vessel. They are mixed, dispersed, emulsified and homogenized together with the suspension in the vessel. The dynamic reaction vessel is equipped with a three-stage high-shear emulsification homogenizer, a jacketed heat exchange temperature control system and an intelligent detection and control module to complete real-time detection, dynamic adjustment and optimization.

[0012] S4, the prepared titanium dioxide suspension is transported from the bottom of the dynamic reactor to the suspension storage tank via a screw conveyor pump and an automatic backwash filter, and then enters the nylon 6 polymerization section.

[0013] Preferably, the titanium dioxide powder in S1 is anatase with a particle size specification D. 90 ≤0.9μm, inner layer coated with SiO2, outer layer coated with silane coupling agent.

[0014] Preferably, the voltage of the particulate electrostatic eliminator in S1 is 30-50kV.

[0015] Preferably, the atomization pressure in S2 is 0.3~0.5MPa, and the droplet size is ≤50μm.

[0016] Preferably, the monomer content of the monomer aqueous solution in S3 is 40-60%.

[0017] Preferably, the dynamic reactor in S3 includes a three-stage high-shear emulsifying homogenizer, a jacketed heat exchange temperature control system, and an intelligent detection and control module. The three-stage high-shear emulsifying homogenizer comprises a stator and rotor disc for primary dispersion, secondary emulsification, and tertiary homogenization, with a stator-rotor gap of 0.2~0.4mm, a rotation speed of 8000~15000rpm, and a particle size distribution ≤1.0μm. The jacketed heat exchange temperature control module has a temperature control range of 25~45℃ and an accuracy of ±1℃. The intelligent detection and control module includes an online laser particle size analyzer and a Zeta potential analyzer, with detection ranges of 0.01~10μm and -100~100mV, respectively, enabling real-time detection, dynamic adjustment, and optimization.

[0018] Preferably, in step S4, an online turbidity meter is installed between the automatic backwash filter and the suspension storage tank to determine whether the finished suspension enters the suspension storage tank or flows back to the dynamic reaction vessel. The turbidity meter has a detection range of 0~200 NTU, and the filter has a backwash pressure of 0.05~0.10 MPa and a filtration accuracy of 1.0 μm.

[0019] This invention provides a system for preparing a dynamically formulated nylon 6 matting agent suspension. The system comprises a dynamic reaction vessel, a three-stage high-shear emulsifying homogenizer, a titanium dioxide raw material silo, a discharge screw, a particle electrostatic eliminator, a powder suction machine, a screw conveyor pump, a filter, and a suspension storage tank. Titanium dioxide powder is temporarily stored in the titanium dioxide raw material silo. The discharge screw, connected to the titanium dioxide raw material silo, controls the discharge speed of the titanium dioxide powder. After the titanium dioxide powder is destaticated by the particle electrostatic eliminator, it enters the powder suction machine. The powder suction machine draws in the titanium dioxide powder through a negative pressure device and mixes it with a circulating dual-fluid atomized liquid. The titanium dioxide suspension, formed by mixing, wetting, and dispersing, enters the dynamic reactor. Deionized water and nylon 6 monomer are mixed together with the titanium dioxide suspension to form a monomer aqueous solution in a static mixer and then added to the dynamic reactor. The mixture is then mixed, dispersed, emulsified, and homogenized to form a well-prepared titanium dioxide suspension. The dynamic reactor is equipped with a three-stage high-shear emulsification homogenizer, a jacketed heat exchange temperature control system, and an intelligent detection and control module. The well-prepared titanium dioxide suspension is then transported from the bottom of the dynamic reactor to the suspension storage tank via a screw conveyor pump and automatic backwashing through a filter. The suspension then enters the nylon 6 polymerization section from the bottom of the suspension storage tank.

[0020] Preferably, the three-stage high-shear emulsifying homogenizer includes a stator and rotor disc for primary dispersion, secondary emulsification, and tertiary homogenization, with a stator-rotor gap of 0.2~0.4mm, a rotation speed of 8000~15000rpm, and a particle size of ≤1.0μm; the jacketed heat exchanger temperature control module has a temperature control range of 25~45℃ and an accuracy of ±1℃; the intelligent detection and control module includes an online laser particle size analyzer and a Zeta potential, with detection ranges of 0.01~10μm and -100~100mV, respectively.

[0021] Preferably, an online turbidimeter is installed between the filter and the suspension storage tank to determine whether the finished suspension enters the suspension storage tank or flows back to the dynamic reaction vessel. The turbidimeter has a detection range of 0~200 NTU, and the filter has a backwashing pressure of 0.05~0.10 MPa and a filtration accuracy of 1.0 μm.

[0022] Beneficial effects

[0023] (1) By using the discharge screw and the particle electrostatic eliminator, the electrostatic agglomeration caused by the mutual friction between solid powders is greatly reduced, while ensuring the stability and continuity of large-capacity feeding.

[0024] (2) By applying the negative pressure suction of the powder suction machine and the dual-fluid nozzle atomization technology, the solid and liquid are rapidly wetted and initially dispersed, reducing the introduction and encapsulation of air.

[0025] (3) A graded gradient high-shear emulsification homogenizer is used to quickly and effectively disperse, emulsify and homogenize matting agents with different particle size ranges, prevent agglomeration, and avoid damage to the titanium dioxide powder coating layer caused by grinding.

[0026] (4) The online intelligent detection and control module is used to detect the preparation status in real time and to dynamically optimize and control the preparation parameters. It is timely and fully meets the high standard requirements of actual production. Attached Figure Description

[0027] Figure 1 This is a flowchart of the method of the present invention;

[0028] Figure 2 A flowchart of an existing technical method;

[0029] Figure 3 This is a diagram of the apparatus of the present invention.

[0030] E1-Dynamic Reactor, E2-Three-stage High-shear Emulsifying Homogenizer, E3-Titanium Dioxide Raw Material Bin, E4-Discharge Screw, E5-Particle Static Eliminator, E6-Powder Suction Machine, E7-Screw Conveyor Pump, E8-Filter, E9-Suspension Storage Tank; S1-Deionized Water, S2-Nylon 6 Monomer, S3-Titanium Dioxide Powder, S4-Suspension. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0032] This invention provides a preparation system and process for a suspension of nylon 6 matting agent based on dynamic formulation. (See appendix) Figure 3 It is known that the system includes a dynamic reaction vessel E1, a three-stage high-shear emulsifying homogenizer E2, a titanium dioxide raw material silo E3, a discharge screw E4, a particle electrostatic eliminator E5, a powder suction machine E6, a screw conveyor pump E7, a filter E8, and a suspension storage tank E9. Titanium dioxide powder S3 is temporarily stored in the titanium dioxide raw material silo E3. The discharge screw E4, connected to the titanium dioxide raw material silo E3, controls the discharge speed of the titanium dioxide powder. The titanium dioxide powder passes through the particle electrostatic eliminator E5 to eliminate static electricity. The titanium dioxide then enters the powder suction machine E6. Preferably, the titanium dioxide raw material silo E3 is a raw material silo equipped with an anti-bridging vibrating screen. The powder suction machine E6 draws in titanium dioxide powder through a negative pressure device, mixes, wets, and disperses it with the circulating dual-fluid atomized liquid to form a titanium dioxide suspension, which then enters the dynamic reaction vessel E1. Demineralized water S1 and nylon 6 monomer S2 are mixed in a static mixer to form a monomer aqueous solution, which is then added to the dynamic reaction vessel E1 and mixed, dispersed, emulsified, and homogenized together with the above-mentioned titanium dioxide suspension. This forms a well-prepared titanium dioxide suspension. Preferably, the dynamic reactor is equipped with a three-stage high-shear emulsification homogenizer, a jacketed heat exchanger temperature control system, and an intelligent detection and control module to complete real-time detection, dynamic preparation, and optimization. Preferably, the three-stage high-shear emulsification homogenizer includes a stator and rotor disk for primary dispersion, secondary emulsification, and tertiary homogenization, with a stator-rotor gap of 0.2~0.4mm, a rotation speed of 8000~15000rpm, and a particle size ≤1.0μm. The temperature control module for heat exchange has a temperature control range of 25~45℃ and an accuracy of ±1℃; the intelligent detection and control module includes an online laser particle size analyzer and a Zeta potential, with detection ranges of 0.01~10μm and -100~100mV, respectively; the prepared titanium dioxide suspension is transported from the bottom of the dynamic reactor E1 through the screw pump E7, and automatically backwashed and filtered by the filter E8 to the suspension storage tank E9, and the suspension S4 enters the nylon 6 polymerization section from the bottom of the suspension storage tank E9.

[0033] The specific process includes the following steps:

[0034] S1, titanium dioxide powder S3 is temporarily stored in titanium dioxide raw material silo E3. The discharge speed is controlled by discharge screw E4. After static electricity is eliminated by particle static eliminator E5, it enters powder suction machine E6. Preferably, the titanium dioxide raw material silo E3 is a raw material silo equipped with anti-bridging vibrating screen.

[0035] S2, the powder suction machine E6 sucks in titanium dioxide powder S3 through the negative pressure device, mixes, wets and disperses it with the circulating dual-fluid atomized liquid to form a titanium dioxide suspension, which enters the dynamic reaction vessel E1.

[0036] S3, Nylon 6 monomer S2 and demineralized water S1 are mixed in a static mixer to form a monomer aqueous solution and then added to the dynamic reaction vessel E1. They are mixed, dispersed, emulsified and homogenized together with the suspension in the vessel. Preferably, the dynamic reaction vessel E1 is equipped with a three-stage high-shear emulsification homogenizer, a jacketed heat exchange temperature control system and an intelligent detection and control module to complete real-time detection, dynamic adjustment and optimization.

[0037] S4, the prepared titanium dioxide suspension is transported from the bottom of the dynamic reactor E1 through the screw conveyor pump E7, and automatically backwashed and filtered by the filter E8 to the suspension storage tank E9. The suspension S4 enters the nylon 6 polymerization section from the bottom of the suspension storage tank E9.

[0038] Example 1

[0039] Example 1 provides a method for preparing a suspension of nylon 6 matting agent based on dynamic formulation, the steps of which are as follows:

[0040] S1, the titanium dioxide powder is selected as anatase type, with a particle size specification D. 90 ≤0.9μm, inner layer coated with SiO2, outer layer coated with silane coupling agent (KH550), temporarily stored in raw material silo equipped with anti-bridging vibrating screen, discharge speed controlled by discharge screw, after static electricity is eliminated by particle static eliminator, enters powder suction machine, discharge speed is set to 60kg / h, static elimination voltage is 40kV;

[0041] S2, the powder suction machine sucks in titanium dioxide powder through a negative pressure device, mixes, wets and disperses it with the circulating dual-fluid atomized liquid to form a titanium dioxide suspension, which enters the dynamic reaction vessel. The atomization pressure is set to 0.4MPa and the droplet size is ≤50μm.

[0042] S3, nylon 6 monomer, and demineralized water are mixed in a static mixer to form a monomer aqueous solution with a concentration of 50%, which is then added to a dynamic reactor. There, it is mixed, dispersed, emulsified, and homogenized with the suspension already in the reactor. The dynamic reactor is equipped with a three-stage high-shear emulsifying homogenizer, a jacketed heat exchanger temperature control system, and an intelligent detection and control module to perform real-time monitoring, dynamic adjustment, and optimization. The three-stage high-shear emulsifying homogenizer has a rotor-stator gap of 0.3 mm and a rotation speed of 8000 rpm. The temperature of the dynamic reactor is 25℃. The online laser particle size analyzer and the dynamic display of the Zeta potential are D... 90 ≤0.93μm, -32mV;

[0043] S4, the prepared titanium dioxide suspension with a titanium dioxide content of 30% is transported from the bottom of the dynamic reactor to the suspension storage tank via a screw conveyor pump and an automatic backwash filter, and then enters the nylon 6 polymerization section. The online turbidity meter between the automatic backwash filter and the suspension storage tank indicates that the suspension index is 122 NTU, the filter backwash pressure is 0.05 MPa, and the filtration accuracy is 1.0 μm.

[0044] Example 2

[0045] This embodiment 2 provides a method for preparing a suspension based on dynamically adjusted nylon 6 matting agent, the steps of which are as follows:

[0046] S1, the titanium dioxide powder is selected as anatase type, with a particle size specification D. 90 ≤0.8μm, inner layer coated with SiO2, outer layer coated with silane coupling agent (KH550), temporarily stored in raw material silo equipped with anti-bridging vibrating screen, discharge speed controlled by discharge screw, after static electricity is eliminated by particle static eliminator, enters powder suction machine, discharge speed is set to 60kg / h, static elimination voltage is 40kV;

[0047] S2, the powder suction machine sucks in titanium dioxide powder through a negative pressure device, mixes, wets and disperses it with the circulating dual-fluid atomized liquid to form a titanium dioxide suspension, which enters the dynamic reaction vessel. The atomization pressure is set to 0.4MPa and the droplet size is ≤50μm.

[0048] S3, nylon 6 monomer, and demineralized water are mixed in a static mixer to form a monomer aqueous solution with a concentration of 50%. This solution is then added to a dynamic reactor, where it is mixed, dispersed, emulsified, and homogenized with the suspension already present. The dynamic reactor is equipped with a three-stage high-shear emulsifying homogenizer, a jacketed heat exchanger temperature control system, and an intelligent detection and control module to perform real-time monitoring, dynamic adjustment, and optimization. The three-stage high-shear emulsifying homogenizer has a rotor-stator gap of 0.3 mm and a rotation speed of 12000 rpm. The temperature of the dynamic reactor is 35℃. The online laser particle size analyzer and the dynamic display of the Zeta potential are D... 90 ≤0.92μm, -36mV;

[0049] S4, the prepared titanium dioxide suspension with a titanium dioxide content of 30% is transported from the bottom of the dynamic reactor to the suspension storage tank via a screw conveyor pump and an automatic backwash filter, and then enters the nylon 6 polymerization section. The online turbidity meter between the automatic backwash filter and the suspension storage tank indicates that the suspension index is 134 NTU, the filter backwash pressure is 0.05 MPa, and the filtration accuracy is 1.0 μm.

[0050] Example 3

[0051] This embodiment 3 provides a method for preparing a suspension based on dynamically adjusted nylon 6 matting agent, the steps of which are as follows:

[0052] S1, the titanium dioxide powder is selected as anatase type, with a particle size specification D. 90 ≤0.8μm, inner layer coated with SiO2, outer layer coated with silane coupling agent (KH550), temporarily stored in raw material silo equipped with anti-bridging vibrating screen, discharge speed controlled by discharge screw, after static electricity is eliminated by particle static eliminator, enters powder suction machine, discharge speed is set to 60kg / h, static elimination voltage is 40kV;

[0053] S2, the powder suction machine sucks in titanium dioxide powder through a negative pressure device, mixes, wets and disperses it with the circulating dual-fluid atomized liquid to form a titanium dioxide suspension, which enters the dynamic reaction vessel. The atomization pressure is set to 0.4MPa and the droplet size is ≤50μm.

[0054] S3, Nylon 6 monomer, and demineralized water are mixed in a static mixer to form a monomer aqueous solution with a concentration of 50%, which is then added to a dynamic reactor. There, they are mixed, dispersed, emulsified, and homogenized with the suspension already in the reactor. The dynamic reactor is equipped with a three-stage high-shear emulsifying homogenizer, a jacketed heat exchanger temperature control system, and an intelligent detection and control module to perform real-time monitoring, dynamic adjustment, and optimization. The three-stage high-shear emulsifying homogenizer has a rotor-stator gap of 0.3 mm and a rotation speed of 15000 rpm. The temperature of the dynamic reactor is 45℃. The online laser particle size analyzer and the dynamic display of the Zeta potential are respectively D... 90 ≤0.90μm, -40mV;

[0055] S4, the prepared titanium dioxide suspension with a titanium dioxide content of 30% is transported from the bottom of the dynamic reactor to the suspension storage tank via a screw conveyor pump and an automatic backwash filter, and then enters the nylon 6 polymerization section. The online turbidity meter between the automatic backwash filter and the suspension storage tank determines the suspension index to be 145 NTU, the filter backwash pressure is 0.05 MPa, and the filtration accuracy is 1.0 μm.

[0056] Comparative Example 1

[0057] Comparative Example 1 provides a method for preparing an existing nylon 6 matting agent suspension, the steps of which are as follows:

[0058] S1, Nylon 6 monomer and demineralized water are added to the preparation tank and mixed by stirring to form a monomer aqueous solution with a concentration of 50% and a preparation tank temperature of 45℃.

[0059] S2, Add titanium dioxide powder to the mixing tank and grind and disperse the mixture;

[0060] S3, the obtained suspension is sequentially passed through a centrifuge and a filter to separate and remove large particles that are not fully dispersed. The qualified nylon 6 matting agent suspension is then stored in the finished product tank.

[0061] Under the same titanium dioxide concentration and temperature conditions, the performance of the suspension prepared in Example 3 of this invention can be compared with that of Comparative Example 1, as shown in Table 1:

[0062]

Claims

1. A method for preparing a dynamically formulated nylon 6 matting agent suspension, characterized in that, Includes the following steps: S1, Titanium dioxide powder is temporarily stored in the titanium dioxide raw material silo. The discharge speed is controlled by the discharge screw. After the static electricity is eliminated by the particle static eliminator, it enters the powder suction machine. S2, the powder suction machine draws in titanium dioxide powder through a negative pressure device, mixes, wets, and disperses it with a circulating dual-fluid atomized liquid to form a titanium dioxide suspension, which then enters the dynamic reaction vessel; the titanium dioxide powder is anatase type with a particle size specification D. 90 ≤0.9μm, inner layer coated with SiO2, outer layer coated with silane coupling agent; S3, Nylon 6 monomers, and demineralized water are mixed in a static mixer to form a monomer aqueous solution, which is then added to a dynamic reactor. There, they are mixed, dispersed, emulsified, and homogenized together with the suspension already in the reactor. The dynamic reactor is equipped with a three-stage high-shear emulsification homogenizer, a jacketed heat exchanger temperature control system, and an intelligent detection and control module to perform real-time monitoring, dynamic adjustment, and optimization. The three-stage high-shear emulsification homogenizer includes a stator and rotor disk that performs primary dispersion, secondary emulsification, and tertiary homogenization. The stator-rotor gap is 0.2~0.4mm, the rotation speed is 8000~15000rpm, and the particle size distribution is ≤1.0μm. The jacketed heat exchanger temperature control system has a temperature control range of 25~45℃ and an accuracy of ±1℃. The intelligent detection and control module includes an online laser particle size analyzer and a Zeta potentiometer, with detection ranges of 0.01~10μm and -100~100mV, respectively. S4. The prepared titanium dioxide suspension is pumped from the bottom of the dynamic reactor through a screw conveyor pump and an automatic backwash filter to the suspension storage tank, and then enters the nylon 6 polymerization section. An online turbidimeter is installed between the automatic backwash filter and the suspension storage tank to determine whether the finished suspension enters the suspension storage tank or flows back to the dynamic reactor. The turbidimeter has a detection range of 0~200 NTU, and the backwash pressure of the filter is 0.05~0.10 MPa with a filtration accuracy of 1.0 μm.

2. The method according to claim 1, characterized in that: The voltage of the particulate electrostatic eliminator in S1 is 30-50kV.

3. The method according to claim 1, characterized in that: The atomization pressure in S2 is 0.3~0.5MPa, and the droplet size is ≤50μm.

4. The method according to claim 1, characterized in that: The monomer content in the monomer aqueous solution in S3 is 40-60%.

5. A system for preparing a dynamically formulated suspension of nylon 6 matting agent, characterized in that, The system includes a dynamic reactor, a three-stage high-shear emulsifying homogenizer, a titanium dioxide raw material silo, a discharge screw, a particle electrostatic eliminator, a powder suction machine, a screw conveyor pump, a filter, and a suspension storage tank. Titanium dioxide powder is temporarily stored in the titanium dioxide raw material silo. The discharge screw, connected to the silo, controls the discharge speed of the titanium dioxide powder. After the particle electrostatic eliminator removes static electricity, the titanium dioxide powder enters the powder suction machine. The powder suction machine draws in the titanium dioxide powder through a negative pressure device, mixes, wets, and disperses it with a circulating dual-fluid atomized liquid to form a titanium dioxide suspension, which enters the dynamic reactor. Demineralized water and nylon 6 monomer are mixed in a static mixer to form a monomer aqueous solution, which is then added to the dynamic reactor. This solution is then mixed, dispersed, emulsified, and homogenized with the titanium dioxide suspension to form a prepared titanium dioxide suspension. The dynamic reactor is equipped with a three-stage high-shear emulsifying homogenizer. The system comprises a high-shear emulsification homogenizer, a jacketed heat exchanger temperature control system, and an intelligent detection and control module. The high-shear emulsification homogenizer includes a rotor-stator disk with primary dispersion, secondary emulsification, and tertiary homogenization functions. The rotor-stator gap is 0.2~0.4mm, the rotation speed is 8000~15000rpm, and the particle size is ≤1.0μm. The jacketed heat exchanger temperature control system has a temperature control range of 25~45℃ and an accuracy of ±1℃. The intelligent detection and control module includes an online laser particle size analyzer and a Zeta potentiometer, with detection ranges of 0.01~10μm and -100~100mV, respectively. The prepared titanium dioxide suspension is pumped from the bottom of the dynamic reactor via a screw conveyor pump, automatically backwashed by a filter, and then transported to a suspension storage tank. The suspension then enters the nylon 6 polymerization section from the bottom of the suspension storage tank. The titanium dioxide powder is anatase with a particle size specification D. 90 ≤0.9μm, inner layer coated with SiO2, outer layer coated with silane coupling agent.

6. The system according to claim 5, characterized in that: An online turbidimeter is installed between the filter and the suspension storage tank to determine whether the finished suspension enters the suspension storage tank or flows back to the dynamic reaction vessel. The turbidimeter has a detection range of 0~200 NTU. The backwashing pressure of the filter is 0.05~0.10 MPa and the filtration accuracy is 1.0 μm.

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