A polymer material preparation device
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BEIJING UNIV OF CHEM TECH
- Filing Date
- 2025-08-01
- Publication Date
- 2026-06-30
AI Technical Summary
Existing polymer material preparation equipment suffers from problems such as uneven material mixing, local overheating or incomplete reaction, inaccurate temperature control, easy clumping and blockage of solid raw materials, low metering accuracy of liquid raw materials, and inaccurate reaction ratios. These problems result in low reaction efficiency, unstable product quality, and poor correlation between pilot-scale data and mass production.
It adopts a double-layer impeller stirring mechanism, a multi-point temperature control system, a precision feeding component, a real-time monitoring device, and an automated control system. Combining the double-layer impeller design of the stirring mechanism with the spiral flow of the temperature control jacket, it achieves efficient mixing, precise temperature control, and real-time monitoring. It is equipped with a high-precision metering pump and an anti-stick coating to reduce material loss, and features an integrated discharge filtration design to improve product purity.
It improved material mixing efficiency by 30%, reduced the molecular weight distribution width of products by 15-20%, met the temperature requirements of different reaction stages, improved reaction stability and product purity, and shortened the pilot-scale data repeatability cycle by more than 30%.
Smart Images
Figure CN224422886U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of polymer materials, and in particular to a polymer material preparation device. Background Technology
[0002] Existing polymer material preparation equipment mainly includes polymerization reactors, which are used to realize the polymerization reaction of monomers. These reactors are typically equipped with stirring devices, temperature control systems, and pressure control systems. The role of the polymerization reactor is crucial; its structure and functional design often directly affect reaction efficiency, product quality (molecular weight distribution, molecular weight, degree of polymerization, stereoregularity, etc.), and the safety and economy of production operations.
[0003] However, existing polymer material preparation equipment has many shortcomings:
[0004] 1. Uneven mixing of materials in the reactor, local overheating or incomplete reaction, resulting in a wide molecular weight distribution of the product;
[0005] 2. It is impossible to precisely control the temperature requirements of different reaction stages (e.g., in a typical preparation process, the condensation stage requires 180-200℃, while the hydrolysis stage requires 80-90℃).
[0006] 3. Solid raw materials are prone to clumping and clogging, and liquid raw materials have low metering accuracy, affecting the reaction ratio;
[0007] 4. Frequent sampling and analysis are required, which leads to fluctuations in the reaction system, resulting in poor correlation between pilot-scale data and mass production equipment, and making scale-up difficult.
[0008] Therefore, a polymer material preparation device integrating efficient mixing, precise temperature control, and real-time monitoring functions is needed to solve the above problems. Utility Model Content
[0009] To address the shortcomings of the prior art, this application proposes a polymer material preparation device, comprising: a reaction vessel body extending longitudinally and having a first end and a second end at both ends in the longitudinal direction; a stirring mechanism disposed inside the reaction vessel body; a temperature control mechanism; a feeding assembly connected to the first end of the reaction vessel body; and a discharging assembly connected to the second end of the reaction vessel body.
[0010] In some embodiments, the stirring mechanism includes a drive unit and a double-layered impeller, comprising a first layer of inclined blades and a second layer of anchor blades. The first layer of inclined blades promotes radial mixing of materials, while the second layer of anchor blades scrapes material off the vessel wall, thus solving the problem of localized material retention. The drive unit may be a drive motor with adjustable power, for example, within a range of 0-500 rpm.
[0011] In some embodiments, the distance between the first layer of inclined blades and the second layer of anchor blades is 1 / 3 of the height of the reactor body, and / or the gap between the second layer of anchor blades and the inner wall of the reactor body is ≤5mm.
[0012] In some embodiments, the temperature control mechanism is configured as follows: a temperature control jacket is installed inside the reactor body, located between the reactor body and the stirring mechanism. The temperature control jacket has space for the flow of heat transfer oil and a guide plate to guide the spiral movement of the heat transfer oil. This allows for temperature control through heat transfer oil circulation, and the guide plate, in conjunction with the heat transfer oil circulation, creates a spiral flow within the jacket, improving heat transfer uniformity. In a pilot embodiment of a device for preparing polyaspartic acid, the temperature control accuracy of this technical solution can reach ±1℃.
[0013] In some implementations, at least three temperature sensors are installed at different locations along the longitudinal direction of the reactor vessel. This allows for real-time monitoring of the temperature at different heights within the vessel, enabling comprehensive control of the reaction conditions.
[0014] In some implementations, the feeding assembly is provided with a solid feed inlet, and a screw feeder is provided on the solid feed inlet. This arrangement can prevent dust generation.
[0015] In some embodiments, the feeding assembly is further provided with a liquid inlet connected to a metering pump, and / or the feeding assembly is further provided with an inert gas interface. The metering pump is preferably a high-precision metering pump, which can achieve an error of ≤±0.5%. The inert gas interface can be used to introduce nitrogen gas to purge the pipeline and prevent oxidation of the raw materials.
[0016] In some embodiments, the inner wall of the reactor vessel is coated with an anti-stick coating. This anti-stick coating prevents product adhesion and reduces cleaning difficulty.
[0017] In some embodiments, the second end of the reactor body is configured with a radially tapering structure in the direction away from the first end. This bottom radially tapering design can reduce material residue.
[0018] In some embodiments, the discharge assembly includes a discharge valve and a filtering device, which is either a removable filter or a centrifugal filter. The mesh size of the removable filter can be selected according to the reaction product; in a pilot embodiment of an apparatus for preparing polyaspartic acid, the removable filter can be a 100-mesh filter. The removable filter facilitates product collection and impurity filtration, reducing post-processing steps. A centrifugal filter is suitable for high-viscosity products and can improve filtration efficiency in certain situations.
[0019] In some embodiments, the polymer material preparation equipment is further equipped with a monitoring unit, which includes a pH sensor and a level gauge. The pH sensor can monitor the acidity or alkalinity of the reaction solution in real time. In a pilot embodiment of an apparatus for preparing polyaspartic acid, the monitoring accuracy can reach ±0.02 pH. The level gauge can be linked to the feeding system to achieve automatic feeding, and the data can be connected to the DCS control system to achieve automated operation.
[0020] In some alternative embodiments, the stirring mechanism is a magnetically driven stirrer. Magnetically driven stirrers are suitable for high-pressure reaction scenarios and can also prevent shaft seal leakage.
[0021] In some alternative embodiments, the temperature control mechanism is an electromagnetic heating device acting on the reactants. The electromagnetic heating device can replace the temperature control jacket; it has a fast heating rate and is suitable for small-batch, rapid testing.
[0022] In some embodiments, a manhole is provided at the first end of the reactor body. Providing a manhole at the top facilitates internal maintenance.
[0023] It should be noted that, without conflict, the various embodiments and features of different embodiments in this application can be combined with each other.
[0024] Compared with existing technologies, the polymer material preparation equipment of this application has the following advantages:
[0025] 1. The combination of double-layer blades and anchor design. In a pilot-scale example of a device for preparing polyaspartic acid, the material mixing efficiency was improved by 30%, and the molecular weight distribution width of the product was reduced by 15-20%.
[0026] 2. Multiple sensors control temperature in different zones. In a pilot-scale embodiment of a device for preparing polyaspartic acid, the polymer material preparation device of this application can meet the temperature requirements of different reaction stages of polyaspartic acid, and the reaction stability is significantly improved.
[0027] 3. The specially designed feeding assembly reduces material loss and contamination, while the discharge assembly adopts an integrated discharge filtration design, which can improve product purity.
[0028] 4. The polymer material preparation equipment used in this application allows for real-time monitoring and automated control of the reaction process, reducing human intervention. In a pilot-scale example of polyaspartic acid preparation, the pilot-scale data showed good repeatability, shortening the industrial scale-up cycle by more than 30%.
[0029] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description
[0030] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application, and the illustrative embodiments and descriptions thereof are used to explain this application. In the drawings:
[0031] Figure 1 A schematic diagram of the polymer material preparation equipment provided in this application.
[0032] Explanation of reference numerals in the attached figures:
[0033] 1-Reaction vessel body, 11-Manhole, 12-Anti-stick coating, 2-Stirring mechanism, 21-Drive unit, 23-Double-layer blades, 231-First-layer inclined blade blade, 232-Second-layer anchor blade, 3-Temperature control mechanism, 33-Temperature sensor, 34-Baffle plate, 35-Heat transfer oil, 36-Temperature control jacket, 4-Feeding assembly, 41-Solid feed inlet, 411-Screw feeder, 42-Liquid feed inlet, 43-Metering pump, 44-Inert gas interface, 5-Discharge assembly, 51-Discharge valve, 52-Filter device, 6-Monitoring unit, 61-pH sensor, 62-Level gauge. Detailed Implementation
[0034] It should be noted that, without conflict, the various embodiments and features of each embodiment in this application can be combined with each other.
[0035] This application will now be described in detail with reference to the accompanying drawings and a pilot-scale example of an apparatus for preparing polyaspartic acid.
[0036] Figure 1 This is a schematic diagram of the polymer material preparation equipment provided in this application. In one specific embodiment, the polymer material preparation equipment of this application is used to prepare polyaspartic acid.
[0037] The polymer material preparation equipment includes: a reaction vessel 1, which extends in a longitudinal direction (the longitudinal direction is...). Figure 1 The reactor body 1 has a vertical direction and has a first end and a second end at both ends in the vertical direction; a stirring mechanism 2 disposed inside the reactor body 1; a temperature control mechanism 3; a feeding assembly 4 connected to the first end of the reactor body 1; and a discharging assembly 5 connected to the second end of the reactor body. In a pilot embodiment of a device for preparing polyaspartic acid, the reactor body 1 is made of 316L stainless steel and has a volume of 50-500L.
[0038] In one embodiment, the stirring mechanism 2 includes a drive unit 21 and a double-layer impeller 23, wherein the double-layer impeller includes a first layer of inclined blades 231 and a second layer of anchor blades 232. The first layer of inclined blades 231 can promote radial mixing of materials, and the second layer of anchor blades 232 can scrape materials from the vessel wall, thereby solving the problem of local material retention. The drive unit 21 may be a drive motor. In a pilot embodiment of an apparatus for preparing polyaspartic acid, the drive unit 21 may be a drive motor, and the power of the drive motor is adjustable, for example, within a range of 0-500 rpm.
[0039] In one embodiment, the distance between the first layer of inclined blades 231 and the second layer of anchor blades 232 is 1 / 3 of the height of the reactor body 1, and / or the gap between the second layer of anchor blades 232 and the inner wall of the reactor body 1 is ≤5mm.
[0040] In one embodiment, the temperature control mechanism 3 is configured as follows: a temperature control jacket 36 is provided inside the reactor body 1, located between the reactor body 1 and the stirring mechanism 2. The temperature control jacket 36 has a space for the flow of heat transfer oil 35 and a guide plate 34 that guides the spiral movement of the heat transfer oil 35. This allows for temperature control through the circulation of the heat transfer oil 35, and the guide plate 34, in conjunction with this, causes the heat transfer oil 35 within the jacket to form a spiral flow, improving heat transfer uniformity. In a pilot embodiment of a device for preparing polyaspartic acid, the temperature control accuracy of this technical solution can reach ±1℃.
[0041] In one embodiment, at least three temperature sensors 33 are installed at different locations along the longitudinal direction of the reactor body 1. This allows for real-time monitoring of the temperature at different heights within the reactor body, enabling comprehensive control of the reaction conditions.
[0042] In one embodiment, the feeding assembly 4 is provided with a solid feed inlet 41, and a screw feeder 411 is provided on the solid feed inlet 41. This arrangement can prevent dust generation.
[0043] In one embodiment, the feeding assembly 4 is further provided with a liquid inlet 42, which is connected to a metering pump 43, and / or the feeding assembly 4 is further provided with an inert gas interface 44. The metering pump 43 is preferably a high-precision metering pump, which can achieve an error of ≤±0.5%. The inert gas interface 44 can be used to introduce nitrogen gas to purge the pipeline and prevent the raw material from oxidizing.
[0044] In one embodiment, the inner wall of the reactor body 1 is coated with an anti-stick coating 12. The anti-stick coating 12 can prevent product adhesion and reduce cleaning difficulty.
[0045] In one embodiment, the second end of the reactor body 1 is configured with a radially tapering structure in the direction away from the first end. This bottom radially tapering structure design can reduce material residue.
[0046] In one embodiment, the discharge assembly 5 includes a discharge valve 51 and a filter device 52, wherein the filter device 52 is a removable filter or a centrifugal filter. The mesh size of the removable filter can be selected according to the reaction product. In a pilot embodiment of an apparatus for preparing polyaspartic acid, the removable filter can be a 100-mesh filter. The removable filter facilitates product collection and impurity filtration, reducing post-processing steps. A centrifugal filter is suitable for high-viscosity products and can improve filtration efficiency under certain conditions.
[0047] In some embodiments, the polymer material preparation equipment is further equipped with a monitoring unit 6, which includes a pH sensor 61 and a level gauge 62. The pH sensor 61 can monitor the acidity or alkalinity of the reaction solution in real time; in a pilot embodiment of a device for preparing polyaspartic acid, the monitoring accuracy can reach ±0.02 pH. The level gauge 62 can be linked to the feeding system to achieve automatic feeding, and the data can be connected to the DCS control system to achieve automated operation.
[0048] In some alternative embodiments, the stirring mechanism 2 is a magnetically driven stirrer. Magnetically driven stirrers are suitable for high-pressure reaction scenarios and can also prevent shaft seal leakage.
[0049] In some alternative embodiments, the temperature control mechanism 3 is an electromagnetic heating device acting on the reactants. The electromagnetic heating device can replace the temperature control jacket 36; it has a fast heating rate and is suitable for small-batch, rapid testing.
[0050] In some embodiments, a manhole 11 is provided at the first end of the reactor body 1. Providing a manhole 11 at the top facilitates internal maintenance.
[0051] In one example of preparing 200 L of polyaspartic acid, the reaction process using the polymer material preparation equipment of this application is as follows:
[0052] Equipment parameters: The volume of the reactor body 1 is selected as 200L, the speed of the stirring mechanism 2 is set to 300rpm, and the flow rate of the heat transfer oil 35 of the temperature control mechanism 3 is selected as 50L / h.
[0053] Raw material input: 50 kg of maleic anhydride is fed through the solid feed inlet 41 and the screw feeder 411. 30 L of 25% ammonia water is delivered through the liquid feed inlet 42 via the metering pump 43. The nitrogen purging flow rate is 0.5 m³ / h. 3 / h;
[0054] Condensation stage: Temperature control jacket 36 heats the inside of reactor 1 to 190°C, stirs for 3 hours, and pH sensor 61 monitors the pH value to ensure that the pH value is ≤3.0;
[0055] Hydrolysis stage: Temperature control jacket 36 cools the reactor body 1 to 85℃, adds 10L of deionized water, adjusts the pH value to 7.0±0.2, and stirs for 1 hour;
[0056] Product processing: The product was collected by filtration device 52 to obtain polyaspartic acid solution (solid content 30%, purity 96%).
[0057] Cleaning: Start the cleaning device and rinse the inside of the reactor body 1 with 0.3MPa high-pressure water for 10 minutes to ensure that the residual amount of material in the reactor body 1 is <0.5kg.
[0058] It should be noted that, without conflict, the various embodiments and features of different embodiments in this application can be combined with each other.
[0059] Compared with existing technologies, the polymer material preparation equipment of this application has the following advantages:
[0060] 1. The combination of double-layer blades and anchor design. In a pilot-scale example of a device for preparing polyaspartic acid, the material mixing efficiency was improved by 30%, and the molecular weight distribution width of the product was reduced by 15-20%.
[0061] 2. Multiple sensors control temperature in different zones. In a pilot-scale embodiment of a device for preparing polyaspartic acid, the temperature requirements of different reaction stages of polyaspartic acid are met, and the reaction stability is significantly improved.
[0062] 3. The specially designed feeding assembly 4 reduces material loss and contamination, while the discharge assembly 5 adopts an integrated discharge filtration design, which can improve product purity.
[0063] 4. The polymer material preparation equipment used in this application allows for real-time monitoring and automated control of the reaction process, reducing human intervention. In a pilot-scale example of polyaspartic acid preparation, the pilot-scale data showed good repeatability, shortening the industrial scale-up cycle by more than 30%.
[0064] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A polymer material preparation device, characterized in that, The polymer material preparation equipment includes: The reactor body (1) extends in a longitudinal direction and has a first end and a second end at both ends in the longitudinal direction; A stirring mechanism (2) is installed inside the reactor body (1); Temperature control mechanism (3); The feed assembly (4) is connected to the first end of the reactor body (1); and The discharge assembly (5) is connected to the second end of the reactor body (1).
2. The apparatus according to claim 1, wherein The stirring mechanism (2) includes a drive unit (21) and a double-layer blade (23), the double-layer blade (23) including a first layer of inclined blade (231) and a second layer of anchor blade (232).
3. The apparatus according to claim 2, wherein The distance between the first layer of inclined blades (231) and the second layer of anchor blades (232) is 1 / 3 of the height of the reactor body (1), and / or the gap between the second layer of anchor blades (232) and the inner wall of the reactor body (1) is ≤5mm.
4. The apparatus according to claim 1, wherein The temperature control mechanism (3) is configured such that a temperature control jacket (36) is provided inside the reactor body (1) at a position between the reactor body (1) and the stirring mechanism (2). The temperature control jacket (36) has a space for the flow of heat transfer oil (35) and a guide plate (34) that can guide the spiral movement of the heat transfer oil (35).
5. The polymer material preparation equipment according to any one of claims 1 to 4, characterized in that, At least three temperature sensors (33) are provided at different positions in the longitudinal direction of the reactor body (1).
6. The polymer material preparation apparatus according to any one of claims 1 to 4, characterized in that, The feeding assembly (4) is provided with a solid feed port (41), and a screw feeder (411) is provided on the solid feed port (41).
7. The polymer material preparation equipment according to claim 6, characterized in that, The feeding assembly (4) is also provided with a liquid inlet (42), which is connected to a metering pump (43), and / or The feeding assembly (4) is also provided with an inert gas interface (44).
8. The polymer material preparation apparatus according to any one of claims 1 to 4, characterized in that, The second end of the reactor body (1) is configured to taper radially in a direction away from the first end.
9. The polymer material preparation apparatus according to any one of claims 1 to 4, characterized in that, The discharge assembly (5) includes a discharge valve (51) and a filter device (52), wherein the filter device (52) is a detachable filter screen or a centrifugal filter.
10. The polymer material preparation apparatus according to any one of claims 1 to 4, characterized in that, The polymer material preparation equipment is also equipped with a monitoring unit (6), which includes a pH sensor (61) and a level gauge (62).