Material feeding system for polycarbonate diol production
The system addresses temperature differences and mixing inefficiencies by preheating and distributing materials uniformly, enhancing reaction efficiency in poly carbonate diol production.
Patent Information
- Application Number
- CN202422327928.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-24
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-09-24
AI Technical Summary
The existing material feeding system for polycarbonate diol production has a large temperature difference between the material and the original material in the reactor, which leads to the problem of local temperature drop and uneven mixing of direct feeding.
The feeding main pipe is set up in the vertical direction, with a flow guide cone and spoiler blade inside, and a water inlet and return pipe outside. It is preheated by heat exchange with materials through high-temperature thermally conductive water, and the material is diverted to the branch pipe through the flow guide cone to ensure uniform feeding.
Effective preheating of materials is achieved, temperature difference affects the reaction in the reaction kettle, ensures that the materials are quickly and evenly mixed in the reaction kettle, and improves reaction efficiency.
Smart Images
Figure CN223096790U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a material feeding system for the production of polycarbonate diol, belonging to the technical field of material feeding. Background Art
[0002] Polycarbonate diol is a polymer containing multiple carbonate groups in the molecule and hydroxyl groups at both ends of the molecule. It is a new type of polycompound and can be used to synthesize polyurethanes with excellent properties. Compared with polyurethanes synthesized from traditional polyester polyols and polyether polyols, polycarbonate-based polyurethanes have excellent mechanical properties, hydrolysis resistance, heat resistance, oxidation resistance, and light resistance.
[0003] In the production process of polycarbonate diol, a material feeding system is required to add various materials for synthesizing polycarbonate diol into the reaction kettle. However, the existing feeding system directly feeds materials. Due to the large temperature difference between the materials and the original materials in the reaction kettle, direct feeding easily causes a local temperature drop, thus affecting the reaction in the reaction kettle. When directly feeding materials, the materials are prone to agglomeration and it is difficult to quickly and evenly mix with the original materials in the reaction kettle.
[0004] In summary, it is obvious that the existing technology has inconveniences and defects in actual use, so it is necessary to improve it. Summary of the Utility Model
[0005] Aiming at the deficiencies in the background art, the utility model provides a material feeding system for the production of polycarbonate diol, which can effectively preheat the materials during the material flow process, solve the problem of large temperature difference between the materials and the original materials in the reaction kettle; and can divide the materials into streams and then feed them to ensure that the added materials are quickly and evenly mixed.
[0006] To solve the above technical problems, the utility model adopts the following technical solutions:
[0007] The material feeding system for the production of polycarbonate diol includes a main feeding pipe arranged vertically. The bottom end of the main feeding pipe is connected with a plurality of feeding branch pipes communicated with it, and a diversion cone is arranged at the bottom end of the inner cavity of the main feeding pipe;
[0008] A plurality of spoiler vanes arranged in a staggered manner are installed vertically inside the main feeding pipe, and a water inlet pipe and a water return pipe are sequentially sleeved outside the main body of the main feeding pipe;
[0009] A flange is fixed at a position on the outer wall of the water return pipe close to its bottom end, and the flange is connected with a flange interface fixedly connected to the top end of the reaction kettle.
[0010] Further, a plurality of feeding branch pipes are distributed in a circumferential manner, and the feeding branch pipes are inclined.
[0011] Further, the feeding branch pipes are located at the top end of the inner cavity of the reaction kettle.
[0012] Further, a sealed clamping cavity is formed between the outer wall of the feeding main pipe and the inner wall of the water inlet pipe, and a sealed clamping cavity is formed between the outer wall of the water inlet pipe and the inner wall of the water return pipe. The bottoms of the two clamping cavities are connected through a return hole.
[0013] Further, the top end of the inner cavity of the feeding main pipe is sealed by a first end plate, and a plurality of material inlets are provided at a position near the top end of the feeding main pipe.
[0014] Further, the flow disturbing blade has a semi-circular structure.
[0015] Further, the tops of the water inlet pipe and the water return pipe are connected to the feeding main pipe through a second end plate of a ring structure.
[0016] Further, a water inlet is provided on one side of the top of the water inlet pipe.
[0017] Further, a water return port is provided on one side of the top of the water return pipe.
[0018] After the present utility model adopts the above technical solutions, compared with the prior art, it has the following advantages:
[0019] The material flows longitudinally in the feeding main pipe. At the same time, the high-temperature heat-conducting water flows in the water inlet pipe, fully exchanges heat with the material in the feeding main pipe, preheats the material, and the preheated material is diverted into each feeding branch pipe through the action of the diversion cone, and the material is evenly added to the reaction kettle.
[0020] The present utility model can effectively preheat the material before entering the reaction kettle, avoid the problem that the temperature difference between the material and the original material in the reaction kettle is large, and directly feeding the material causes a local temperature drop, thereby affecting the reaction in the reaction kettle; the present utility model diverts the material and then feeds it, ensuring that the added material can be quickly and evenly mixed in the reaction kettle.
[0021] The present utility model will be described in detail below with reference to the drawings and embodiments. Description of the Drawings
[0022] Figure 1 is the installation schematic diagram of the present utility model;
[0023] Figure 2 is the structural schematic diagram of the present utility model;
[0024] Figure 3 is Figure 2 the enlarged view of the partial structure in
[0025] In the figure, 1 is the feeding supervisor, 2 is the feeding branch pipe, 3 is the flow guiding cone, 4 is the first end plate, 5 is the material inlet, 6 is the turbulence generating vane, 7 is the water inlet pipe, 8 is the water return pipe, 9 is the return hole, 10 is the second end plate, 11 is the water inlet, 12 is the water return port, 13 is the flange, 14 is the flange interface, and 15 is the reaction kettle. Detailed implementation mode
[0026] For a clearer understanding of the technical features, objectives, and effects of the present utility model, the specific implementation mode of the present utility model will now be described with reference to the accompanying drawings.
[0027] As Figures 1 - 3 As shown together, the present utility model provides a material feeding system for polycarbonate diol production, including a feeding main pipe 1 arranged vertically. The bottom end of the feeding main pipe 1 is connected with a plurality of feeding branch pipes 2 communicated with it. The plurality of feeding branch pipes 2 are circumferentially distributed, and the feeding branch pipes 2 are inclined. The feeding branch pipes 2 are located at the top end of the inner cavity of the reaction kettle 15.
[0028] A flow guiding cone 3 is arranged at the bottom end of the inner cavity of the feeding main pipe 1. By setting the flow guiding cone 3, it is convenient to divert the materials in the feeding main pipe 1 into each feeding branch pipe 2.
[0029] The top end of the inner cavity of the feeding main pipe 1 is blocked by a first end plate 4. A plurality of material inlets 5 are arranged at a position close to the top end of the feeding main pipe 1, and different materials are introduced through different material inlets 5.
[0030] A plurality of turbulence generating vanes 6 arranged in a staggered manner are installed vertically inside the feeding main pipe 1. The turbulence generating vanes 6 are in a semi-circular structure. The plurality of turbulence generating vanes 6 are arranged in a staggered manner to reduce the flow rate of the materials, so as to facilitate sufficient heat absorption.
[0031] The outer body of the feeding main pipe 1 is sequentially sleeved with a water inlet pipe 7 and a water return pipe 8. A sealed clamping cavity is formed between the outer wall of the feeding main pipe 1 and the inner wall of the water inlet pipe 7, and a sealed clamping cavity is formed between the outer wall of the water inlet pipe 7 and the inner wall of the water return pipe 8. The bottoms of the two clamping cavities are connected through a return hole 9.
[0032] The top ends of the water inlet pipe 7 and the water return pipe 8 are connected to the feeding main pipe 1 through a second end plate 10 with a ring structure.
[0033] A water inlet 11 is arranged on one side of the top of the water inlet pipe 7, and a water return port 12 is arranged on one side of the top of the water return pipe 8. High-temperature heat-conducting water is introduced into the water inlet pipe 7 through the water inlet 11. During the flowing process in the water inlet pipe 7, it exchanges heat fully with the materials in the feeding main pipe 1 to preheat the materials in the feeding main pipe 1.
[0034] A flange 13 is fixed at a position on the outer wall of the return water pipe 8 near its bottom end, and the flange 13 is connected to a flange interface 14 fixedly connected to the top end of the reaction kettle 15, so as to fix the overall feeding system.
[0035] The specific working principle of the present utility model:
[0036] Each material for synthesizing polycarbonate diol is added into the main feeding pipe 1 from the material inlet 5, and the material flows longitudinally in the main feeding pipe 1. At the same time, high-temperature heat-conducting water is introduced into the water inlet pipe 7 from the water inlet 11, and fully exchanges heat with the material in the main feeding pipe 1 during the flowing process in the water inlet pipe 7 to preheat the material; the cooled heat-conducting water enters the return water pipe 8 from the return hole 9 and is finally output from the water return port 12; the preheated material is shunted into each feeding branch pipe 2 under the action of the diversion cone 3, and the material is evenly added into the reaction kettle 15.
[0037] The present utility model can effectively preheat the material before entering the reaction kettle, avoid the large temperature difference between the material and the original material in the reaction kettle, and directly feeding the material resulting in a local temperature drop, thereby affecting the reaction in the reaction kettle. The present utility model shunts the material and then feeds it, ensuring that the added material is quickly and evenly mixed in the reaction kettle.
[0038] The above is an example of the best implementation mode of the present utility model, and the parts not described in detail are all common knowledge of those of ordinary skill in the art. The protection scope of the present utility model shall be subject to the content of the claims, and any equivalent transformation based on the technical inspiration of the present utility model is also within the protection scope of the present utility model.
Claims
1. The material feeding system for the production of polycarbonate diol, characterized in that: It includes a feeding main pipe (1) arranged vertically. A plurality of feeding branch pipes (2) communicated with the feeding main pipe (1) are connected to the bottom end of the feeding main pipe (1). A flow guiding cone (3) is arranged at the bottom end of the inner cavity of the feeding main pipe (1); A plurality of spoiler vanes (6) arranged in a staggered manner are installed vertically inside the feeding main pipe (1). A water inlet pipe (7) and a water return pipe (8) are sequentially sleeved outside the main body of the feeding main pipe (1); A flange plate (13) is fixed at a position on the outer wall of the water return pipe (8) close to its bottom end. The flange plate (13) is connected to a flange interface (14) fixedly connected to the top end of the reaction kettle (15).
2. The material feeding system for producing polycarbonate diol according to claim 1, characterized in that: The plurality of feeding branch pipes (2) are distributed in a circumferential manner, and the feeding branch pipes (2) are arranged obliquely.
3. The material feeding system for polycarbonate diol production according to claim 2, characterized in that: The feeding branch pipes (2) are located at the top end of the inner cavity of the reaction kettle (15).
4. The material feeding system for producing polycarbonate diol according to claim 1, wherein: A sealed clamping cavity is formed between the outer wall of the feeding main pipe (1) and the inner wall of the water inlet pipe (7). A sealed clamping cavity is formed between the outer wall of the water inlet pipe (7) and the inner wall of the water return pipe (8). The bottoms of the two clamping cavities are connected through a return hole (9).
5. The material feeding system for producing polycarbonate diol according to claim 1, characterized in that: The top end of the inner cavity of the feeding main pipe (1) is sealed by a first end plate (4). A plurality of material inlets (5) are arranged at a position of the feeding main pipe (1) close to its top end.
6. The material feeding system for producing polycarbonate diol according to claim 1, characterized in that: The spoiler vanes (6) are in a semi-circular structure.
7. The material feeding system for producing polycarbonate diol according to claim 1, wherein: The top ends of the water inlet pipe (7) and the water return pipe (8) are connected to the feeding main pipe (1) through a second end plate (10) in a ring structure.
8. The material feeding system for the production of polycarbonate diol according to claim 1, characterized in that: A water inlet (11) is arranged on one side of the top of the water inlet pipe (7).
9. The material feeding system for producing polycarbonate diol according to claim 1, characterized in that: A water return port (12) is arranged on one side of the top of the water return pipe (8).