Continuous synthesis reaction device for polyurethane prepolymer
By designing a vertical multi-stage reactor assembly and a self-cleaning module, the problems of uneven material mixing and inaccurate temperature control in polyurethane production are solved, achieving efficient and precise polyurethane production and ensuring product quality and production efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NANJING HUIKE POLYMER MATERIALS CO LTD
- Filing Date
- 2025-03-13
- Publication Date
- 2026-04-10
AI Technical Summary
Traditional polyurethane production systems suffer from severe material backmixing, uneven mixing, inaccurate temperature control, and a lack of self-cleaning functions, which affect product quality and production efficiency.
The system employs a vertical multi-stage reactor assembly with a conical transition section, combined with a multi-mode mixing mechanism that integrates spiral stirring and ultrasonic fields to achieve uniform material mixing. The temperature control system achieves precise temperature control through multiple independent temperature control units and a reaction liquid temperature compensator. The self-cleaning module removes residues through a rotating spray head and a conical drain valve.
It achieves uniform mixing and precise temperature control of polyurethane raw materials, ensuring product quality, effectively removing equipment residues, and improving production efficiency.
Smart Images
Figure CN224100696U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the high polymer material synthetic equipment technical field, concretely relates to a kind of polyurethane prepolymer continuous synthesis reaction device. BACKGROUND
[0002] As an important high polymer material, polyurethane is widely used in many fields. However, the traditional polyurethane production system adopts horizontal series reaction kettle structure, which has the following problems: first, there is serious material back mixing and uneven mixing, especially for the polyurethane prepolymer synthesis process with significant viscosity change, the existing equipment is difficult to realize accurate control of reaction kinetics, and uneven mixing leads to unstable product quality; second, the temperature control is not accurate enough to meet the temperature requirements of different production stages; third, there is no effective self-cleaning function, and residues are easy to accumulate in the equipment, affecting production efficiency and product quality. Therefore, it is of great significance to develop a multi-stage series polyurethane production system with high efficiency, accuracy and self-cleaning function. SUMMARY
[0003] To solve the above-mentioned problems, the utility model discloses a kind of polyurethane prepolymer continuous synthesis reaction device, which realizes material gradient propulsion by vertical multi-stage reaction kettle group cooperating with conical transition section, and realizes uniform mixing of polyurethane raw materials by multi-mode mixing mechanism of spiral stirring and ultrasonic field synergistic effect; the temperature control system realizes accurate temperature control through multiple independent temperature control units and reaction liquid temperature compensator; the self-cleaning module effectively removes residues in the equipment, ensuring production efficiency and product quality.
[0004] To achieve the above purpose, the specific technical scheme of the present application is as follows:
[0005] A kind of polyurethane prepolymer continuous synthesis reaction device, comprising:
[0006] Feed system, multi-stage series reaction kettle group, dynamic mixing mechanism, temperature control system and product collection system;
[0007] The multi-stage series reaction kettle group comprises at least three vertically arranged cylindrical reaction kettles, and the adjacent reaction kettles are connected by conical transition section;
[0008] The dynamic mixing mechanism comprises spiral stirring blades and kettle wall ultrasonic transducer arranged in each reaction kettle;
[0009] The temperature control system comprises multiple independent temperature control units and reaction liquid temperature compensator arranged in the jacket of each reaction kettle.
[0010] The inner wall of the conical transition section is provided with spiral guide ribs, the guide angle is 25-35°, and the rib height is 1 / 8-1 / 6 of the pipe diameter.
[0011] The helical stirring blade axis forms an angle of 5-15° with the reaction kettle axis.
[0012] The ultrasonic transducers are uniformly distributed along the circumference of the reaction kettle in three groups, each group containing 2-4 frequency-adjustable piezoelectric ceramic transducers, and the working frequency range is 20-100 kHz.
[0013] The multi-section independent temperature control unit comprises three annular temperature control zones distributed along the axial direction of each reaction kettle, and a heat insulation buffer layer is arranged between adjacent temperature control zones.
[0014] The device further comprises a self-cleaning module, which comprises a rotating spray head arranged at the top of each reaction kettle and a conical blowdown valve arranged at the bottom of the kettle.
[0015] Based on the above technical features, further, the rotating spray head is provided with a double-channel structure, including a solvent cleaning channel and an inert gas purging channel.
[0016] Compared with the prior art, the present application has the following beneficial effects:
[0017] The vertical multi-stage reaction kettle group cooperates with the conical transition section, realizes gradient pushing of the material, and the multi-mode mixing mechanism of the helical stirring and the ultrasonic field synergistic effect realizes uniform mixing of the polyurethane raw materials; the temperature control system realizes precise temperature control through the multi-section independent temperature control unit and the reaction liquid temperature compensator; the self-cleaning module effectively removes the residues in the equipment, and ensures the production efficiency and product quality. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 It is a structure schematic view of the polyurethane prepolymer continuous synthesis reaction device of the utility model;
[0019] Figure 2 It is a structure schematic view of the conical transition section in the utility model;
[0020] Figure 3 It is a distribution schematic view of the kettle wall ultrasonic transducer in the utility model;
[0021] LIST OF FIGURES
[0022] 100, feed system; 200, multi-stage series reaction kettle group; 210, reaction kettle; 220, conical transition section; 221, flow guide rib; 300, dynamic mixing mechanism; 310, helical stirring blade; 320, kettle wall ultrasonic transducer; 400, temperature control system; 410, temperature control unit; 411, heat insulation buffer layer; 420, temperature compensator; 5, product collection system; 600, self-cleaning module; 610, rotating spray head; 611, solvent cleaning channel; 612, inert gas purging channel; 620, conical blowdown valve. DETAILED DESCRIPTION
[0023] The present application will be further clarified by the following description and embodiments, which should be understood not to limit the scope of the present application.
[0024] It should be noted that the words "upper", "lower", "left", "right", "front", and "back" used in the following description refer to the directions in the drawings, and the words "inner" and "outer" refer to the directions towards or away from the geometric center of a particular component. In addition, the terms "mounting", "connecting", and "connection" should be interpreted broadly, for example, they can be fixed connection, or detachable connection, or integrally connected; they can be mechanical connection, or electrical connection; they can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0025] As shown in Figure 1 A polyurethane prepolymer continuous synthesis reaction device, comprising: a feeding system 100, a multi-stage series reaction kettle group 200, a dynamic mixing mechanism 300, a temperature control system 400, and a product collection system 500.
[0026] The multi-stage series reaction kettle group 200 comprises at least three vertically arranged cylindrical reaction kettles 210, and the adjacent reaction kettles are connected through a conical transition section 220;
[0027] The dynamic mixing mechanism 300 comprises spiral stirring blades 310 and kettle wall ultrasonic transducers 320 arranged in each reaction kettle, the spiral stirring blades 310 are usually driven by rotating motors respectively, and the rotating speed of each rotating motor can be controlled respectively; the temperature control system 400 comprises multi-section independent temperature control units 410 arranged in the jacket of each reaction kettle and reaction liquid temperature compensators 420.
[0028] As shown in Figure 2 Preferably, the conical transition section 220 is provided with spiral guide ribs 221 on the inner wall, the guide angle of the spiral guide ribs 221 is 25-35°, and the rib height is 1 / 8-1 / 6 of the pipe diameter.
[0029] Preferably, the axis of the spiral stirring blade 310 forms an angle of 5-15° with the axis of the reaction kettle.
[0030] As shown in Figure 3 The ultrasonic transducers 320 are uniformly distributed along the circumference of the reaction kettle, and each group comprises 2-4 frequency-adjustable piezoelectric ceramic transducers, and the working frequency range is 20-100 kHz.
[0031] The multi-section independent temperature control units 410 comprise three annular temperature control zones distributed along the axis of each reaction kettle, and a heat insulation buffer layer 411 is arranged between adjacent temperature control zones.
[0032] The device also comprises a self-cleaning module 600, including a rotating spray head 610 arranged at the top of each reactor and a conical blowdown valve 620 arranged at the bottom of the reactor, the opening angle of the conical blowdown valve 620 being linked to the pressure in the reactor.
[0033] The rotating spray head 610 is provided with a double-channel structure, including a solvent cleaning channel 611 and an inert gas purging channel 612.
[0034] In summary, the present application has a simple structure, realizes gradient material advancement through the combination of vertical multi-stage reactors and conical transition sections, and realizes uniform mixing of polyurethane raw materials through the multi-mode mixing mechanism of spiral stirring and ultrasonic field synergy; the temperature control system realizes precise temperature control through multiple independent temperature control units and a reaction liquid temperature compensator; and the self-cleaning module effectively removes residues in the equipment, ensuring production efficiency and product quality.
[0035] It should be noted that the drawings only illustrate the technical idea of the present application and cannot limit the protection scope of the present application. For ordinary skilled persons in the art, several improvements and refinements can be made without departing from the principles of the present application, and these improvements and refinements all fall within the protection scope of the claims of the present application.
Claims
1. A continuous polyurethane prepolymer synthesis reaction apparatus characterized by, The application relates to a multi-stage continuous-flow reactor for preparing high-purity graphene oxide. The application relates to a multi-stage continuous-flow reactor for preparing high-purity graphene oxide. The application relates to a multi-stage continuous-flow reactor for preparing high-purity graphene oxide. The application relates to a multi-stage continuous-flow reactor for preparing high-purity graphene oxide. The application relates to a multi-stage continuous-flow reactor for preparing high-purity graphene oxide.
2. The apparatus of claim 1, wherein: The application relates to a multi-stage continuous-flow reactor for preparing high-purity graphene oxide.
3. The apparatus of claim 1, wherein: The application relates to a multi-stage continuous-flow reactor for preparing high-purity graphene oxide.
4. The apparatus of claim 1, wherein: The application relates to a multi-stage continuous-flow reactor for preparing high-purity graphene oxide.
5. The apparatus of claim 1, wherein: The application relates to a multi-stage continuous-flow reactor for preparing high-purity graphene oxide.
6. The apparatus of claim 1, wherein: The application relates to a multi-stage continuous-flow reactor for preparing high-purity graphene oxide.
7. The apparatus of claim 6, wherein: The application relates to a multi-stage continuous-flow reactor for preparing high-purity graphene oxide. The application relates to a multi-stage continuous-flow reactor for preparing high-purity graphene oxide. The application relates to a multi-stage continuous-flow reactor for preparing high-purity graphene oxide. The application relates to a multi-stage continuous-flow reactor for preparing high-purity graphene oxide. The application relates to a multi-stage continuous-flow reactor for preparing high-purity graphene oxide. The application relates to a multi-stage continuous-flow reactor for preparing high-purity graphene oxide. The application relates to a multi-stage continuous-flow reactor for preparing high-purity graphene oxide. The application relates to a multi-stage continuous-flow reactor for preparing high-purity graphene oxide. The application relates to a multi-stage continuous-flow reactor for preparing high-purity graphene oxide. The application relates to a multi-stage continuous-flow reactor for preparing high-purity graphene oxide. The application relates to a multi-stage continuous-flow reactor for preparing high-purity graphene oxide. The application relates to a multi-stage continuous-flow reactor for preparing high-purity graphene oxide. The application relates to a multi-stage continuous-flow reactor for preparing high-purity graphene oxide. The application relates to a multi-stage continuous-flow reactor for preparing high-purity graphene oxide. The application relates to a multi-stage continuous-flow reactor for preparing high-purity graphene oxide. The application relates to a multi-stage continuous-flow reactor for preparing high-purity graphene oxide. The application relates to a multi-stage continuous-flow reactor for preparing high-purity graphene oxide. The application relates to a multi-stage continuous-flow reactor for preparing high-purity graphene oxide. The application relates to a multi-stage continuous-flow reactor for preparing high-purity graphene oxide. The application relates to a multi-stage continuous-flow reactor for preparing high-purity graphene oxide. The application relates to a multi-stage continuous-flow reactor for preparing high-purity graphene oxide. The application relates to a multi-stage continuous-flow reactor for preparing high-purity graphene oxide. The application relates to a multi-stage continuous-flow reactor for preparing high-purity graphene oxide. The application relates to a multi-stage continuous-flow reactor for preparing high-purity graphene oxide. The application relates to a multi-stage continuous-flow reactor for preparing high-purity graphene oxide. The application relates to a multi-stage continuous-flow reactor for preparing high-purity graphene oxide. The application relates to a multi-stage continuous-flow reactor for preparing high-purity graphene oxide. The application relates to a multi-stage continuous-flow reactor for preparing high-purity graphene oxide. The application relates to a multi-stage continuous-flow reactor for preparing high-purity graphene oxide. The application relates to a multi-stage continuous-flow reactor for preparing high-purity graphene oxide. The application relates to a multi-stage continuous-flow reactor for preparing high-purity graphene oxide. The application relates to a multi-stage continuous-flow reactor for preparing high-purity graphene oxide. The application relates to a multi-stage continuous-flow reactor for preparing high-purity graphene oxide. The application relates to a multi-stage continuous-flow reactor for preparing high-purity graphene oxide. The application relates to a multi-stage continuous-flow reactor for preparing high-purity graphene oxide. The application relates to a multi-stage continuous-flow reactor for preparing high-purity graphene oxide. The application relates to a multi-stage continuous-flow reactor for preparing high-purity graphene oxide. The application relates to a multi-stage continuous-flow reactor for preparing high-purity graphene oxide. The application relates to a multi-stage continuous-flow reactor for preparing high-purity graphene oxide. The application relates to a multi-stage continuous