Automatic vacuumizing polyester reaction kettle

Abstract

The utility model discloses an automatic vacuum-pumping polyester reaction kettle which comprises a kettle body, a kettle cover is fastened at the top end of the kettle body through a bolt, an air outlet is formed in the surface of the kettle cover, a vacuum-pumping assembly is installed at the air outlet, a stirring shaft is rotatably connected to the center of the bottom end of the kettle body, and a vacuum-pumping assembly is installed at the center of the bottom end of the kettle body. An anchor stirrer is fixed to the top end of the stirring shaft, the edge of the anchor stirrer is attached to the inner wall of the kettle body, a support is welded between the stirring shaft and the anchor stirrer, a gear motor is installed at the bottom end of the stirring shaft, and a gear motor body is fixed to the bottom of the kettle body; discharging ports are formed in the positions, located in the centers of the two sides of the stirring shaft, of the bottom end of the kettle body, discharging valves are installed at the discharging ports, the driving motor is installed at the bottom of the kettle body to directly drive the stirrer, transmission loss is reduced, stirring is more efficient, the reaction rate is increased, the production period is shortened, and the overall production efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of reaction vessel technology, specifically relating to an automatically vacuumed polyester reaction vessel. Background Technology

[0002] Polyester reactors are crucial equipment in PET production, and their performance directly impacts production efficiency and quality. During PET production, due to PET's high viscosity, the material's flowability is poor during polymerization, requiring significant stirring torque to ensure thorough mixing and flow. Furthermore, the viscous nature of PET results in a relatively slow discharge process, further affecting production efficiency. In existing technologies, the reactor's drive source is typically located at the top of the reactor lid. While multi-stage reducers are sometimes used to increase the stirring shaft torque to improve stirring efficiency, this increases equipment complexity and maintenance costs. Additionally, the top-mounted drive source can lead to excessively long stirring shafts, potentially causing bending or vibration issues. Moreover, traditional discharge methods rely heavily on valves or outlets at the bottom of the reactor, with discharge speeds limited by material flowability, failing to meet the demands of rapid production. Therefore, addressing the problems in existing technologies, this invention proposes a novel polyester reactor designed to reduce transmission losses by directly driving the agitator and enabling convenient and rapid discharge, thereby improving production efficiency and product quality.

[0003] No effective solutions have yet been proposed to address the problems in the relevant technologies. Utility Model Content

[0004] To achieve the above objectives, this utility model provides the following technical solution: an automatically vacuumed polyester reactor, comprising a reactor body, a reactor lid fastened to the top of the reactor body by bolts, an air outlet on the surface of the reactor lid, a vacuuming component installed at the air outlet, a stirring shaft rotatably connected to the center of the bottom of the reactor body, an anchor-type stirrer fixed to the top of the stirring shaft, the edge of the anchor-type stirrer being fitted against the inner wall of the reactor body, a bracket welded between the stirring shaft and the anchor-type stirrer, a geared motor installed at the bottom of the stirring shaft, the body of the geared motor being fixed to the bottom of the reactor body, and discharge ports located at the center of both sides of the bottom of the reactor body at the stirring shaft, with discharge valves installed at the discharge ports.

[0005] As a preferred technical solution of this utility model, the rotating connection between the vessel body and the stirring shaft adopts a dynamic sealing structure.

[0006] As a preferred embodiment of the present invention, the vacuum assembly includes an air pipe, one end of which is connected to an air outlet and an explosion-proof valve is installed at the connection point, and the other end of which is connected to a vacuum pump.

[0007] As a preferred embodiment of this utility model, an inlet with a sight glass is installed on one side of the vessel lid, and a pressure gauge is installed on the other side of the vessel lid.

[0008] As a preferred embodiment of this utility model, a heating layer is installed on the outer wall of the vessel, and a heat insulation layer is fixed on the outside of the heating layer.

[0009] As a preferred technical solution of this utility model, a fixing frame is welded to the outside of the vessel body.

[0010] Compared with existing technologies, the beneficial effects of this invention are as follows: By installing the drive motor at the bottom of the reactor to directly drive the agitator, this invention reduces transmission losses, making stirring more efficient, thereby accelerating the reaction rate, shortening the production cycle, and improving overall production efficiency. Bottom mounting also reduces the length of the agitator shaft, thus reducing potential bending or vibration problems caused by an excessively long shaft. Simultaneously, the anchor-type agitator continuously scrapes material off the reactor wall, renewing the material surface and ensuring thorough mixing of reactants, thereby improving the uniformity and quality of the polyester product. It reduces additional energy consumption caused by transmission losses and an excessively long agitator shaft, thus lowering energy consumption during production. Two discharge ports facilitate rapid discharge; the use of a vacuum assembly effectively prevents oxidation and corrosion of reactants and products, extending the service life of the equipment. Attached Figure Description

[0011] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 This is a schematic cross-sectional view of the vessel body in this utility model;

[0014] In the diagram: 1. Vessel body; 2. Vessel lid; 3. Gas outlet; 4. Stirring shaft; 5. Anchor stirrer; 6. Support; 7. Gear motor; 8. Discharge port; 9. Discharge valve; 10. Gas pipe; 11. Vacuum pump; 12. Inlet with sight glass; 13. Explosion-proof gas valve; 14. Pressure gauge; 15. Heating layer; 16. Insulation layer; 17. Fixing frame. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Example

[0017] Please see Figure 1-2 This utility model provides the following technical solution: an automatically vacuumed polyester reactor, comprising a reactor body 1, which is the main structure of the reactor and is used to contain reactants and carry out chemical reactions; a reactor lid 2 is fastened to the top of the reactor body 1 by bolts, ensuring the reactor's airtightness. An outlet 3 is provided on the surface of the lid 2 for discharging gases from the reaction system. A vacuum assembly is installed at the outlet 3, which can remove gases from the reaction system, prevent oxidation and corrosion of reactants and products, and reduce the reaction temperature; a stirring shaft 4 is rotatably connected to the center of the bottom of the reactor body 1, which is used to stir the reactants to ensure uniform reaction. An anchor-type agitator 5 is fixed to the top of the stirring shaft 4. The edge of the anchor-type agitator 5 is set against the inner wall of the vessel body 1. The anchor-type agitator 5 can continuously scrape off the material on the vessel wall and renew the material surface. At the same time, a bracket 6 is welded between the stirring shaft 4 and the anchor-type agitator 5 to improve stirring efficiency and ensure the structural strength of the anchor-type agitator 5. A geared motor 7 is installed at the bottom of the stirring shaft 4 to drive the stirring shaft 4 to rotate. The geared motor 7 is fixed to the bottom of the vessel body 1. The installation of the geared motor 7 at the bottom of the vessel body can reduce the torque generated during stirring, because it can drive the agitator more directly, reduce transmission loss, and also reduce the length of the stirring shaft, thereby reducing the bending or vibration problems that may occur due to an excessively long stirring shaft. A discharge port 8 is opened at the center of both sides of the stirring shaft 4 at the bottom of the vessel body 1. The discharge port 8 is used to discharge the reaction products after the reaction is completed. A discharge valve 9 is installed at the discharge port 8 to control the discharge process of the reaction products, ensuring the safety and convenience of operation.

[0018] To prevent material leakage from the rotating connection, in this embodiment, as a preferred technical solution of the present invention, the rotating connection between the vessel body 1 and the stirring shaft 4 adopts a dynamic sealing structure.

[0019] In order to ensure the vacuum level inside the vessel body 1, a vacuum pump 11 is used to evacuate the inside of the vessel body 1. In this embodiment, as a preferred technical solution of the present invention, the vacuum evacuation assembly includes a gas pipe 10, one end of which is connected to the gas outlet 3 and an explosion-proof gas valve 13 is installed at the connection point, and the other end of the gas pipe 10 is connected to the vacuum pump 11.

[0020] In order to facilitate observation of the internal pressure of the vessel body 1, in this embodiment, as a preferred technical solution of the present invention, an inlet 12 with a sight glass is installed on one side of the vessel cover 2, and a pressure gauge 14 is installed on the other side of the vessel cover 2.

[0021] In order to facilitate the heating and heat preservation of the material inside the vessel body 1, in this embodiment, as a preferred technical solution of the present invention, a heating layer 15 is installed on the outer wall of the vessel body 1, and a heat preservation layer 16 is fixed on the outside of the heating layer 15. The heating layer 15 can be heated by electric heating or steam heating.

[0022] To ensure the stability of the entire unit when placed, in this embodiment, as a preferred technical solution of the present invention, a fixing frame 17 is welded to the outside of the vessel body 1.

[0023] In summary, the technical solution of this utility model uses a geared motor 7 to drive the stirring shaft 4 to rotate, which in turn drives the anchor-type stirrer 5 and its support 6 to rotate, thereby achieving stirring of the materials inside the vessel 1. The edge of the anchor-type stirrer 5 is in close contact with the bottom of the vessel 1, which can continuously scrape off the materials on the inner wall of the vessel 1, renewing the material surface, thereby utilizing the heating layer 15 on the outer wall of the vessel 1 to continuously heat the materials and promote the reaction synthesis. During the polycondensation reaction stage, the vessel 1 is automatically evacuated by a vacuum pump 11 and a gas pipeline system to remove gases from the reaction system, prevent oxidation and corrosion of reactants and products, and reduce the reaction temperature.

[0024] Finally, it should be noted that, in this utility model, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An automatically vacuum-operated polyester reactor, comprising a reactor body (1), wherein a reactor lid (2) is bolted to the top of the reactor body (1), characterized in that: The surface of the lid (2) is provided with an air outlet (3), and a vacuum assembly is installed at the air outlet (3). A stirring shaft (4) is rotatably connected to the center of the bottom end of the vessel body (1). An anchor stirrer (5) is fixed at the top of the stirring shaft (4). The edge of the anchor stirrer (5) is set against the inner wall of the vessel body (1). A bracket (6) is welded between the stirring shaft (4) and the anchor stirrer (5). A geared motor (7) is installed at the bottom end of the stirring shaft (4). The body of the geared motor (7) is fixed to the bottom of the vessel body (1). A discharge port (8) is provided at the center of both sides of the bottom end of the vessel body (1). A discharge valve (9) is installed at the discharge port (8).

2. The polyester reactor with automatic vacuuming according to claim 1, characterized in that: The rotating connection between the vessel body (1) and the stirring shaft (4) adopts a dynamic sealing structure.

3. The polyester reactor with automatic vacuuming according to claim 1, characterized in that: The vacuum assembly includes a gas pipe (10), one end of which is connected to an air outlet (3) and an explosion-proof gas valve (13) is installed at the connection. The other end of the gas pipe (10) is connected to a vacuum pump (11).

4. The polyester reactor with automatic vacuuming according to claim 1, characterized in that: The vessel lid (2) is equipped with an inlet (12) with a sight glass on one side and a pressure gauge (14) on the other side.

5. The polyester reactor with automatic vacuuming according to claim 1, characterized in that: A heating layer (15) is installed on the outer wall of the vessel body (1), and a heat insulation layer (16) is fixed on the outside of the heating layer (15).

6. The polyester reactor with automatic vacuuming according to claim 1, characterized in that: A fixing frame (17) is welded to the outside of the vessel body (1).

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