PET (Polyethylene Terephthalate) material smelting polycondensation equipment

Abstract

The utility model discloses melting and polycondensation equipment for PET (Polyethylene Terephthalate) materials. The melting and polycondensation equipment comprises a reaction kettle and a stock bin, a bottom plate is arranged below the reaction kettle, supporting legs are arranged at four corners below the bottom plate, and the stock bin is located among the supporting legs; the reaction kettle is formed by detachably connecting a kettle body and a cover body; a material conveying pipe is communicated between the kettle body and the material bin; supporting side plates are arranged on the bottom plate and close to the two ends, and an overturning assembly is arranged between the supporting side plates. Through the two rotating rods and the two supporting side plates, the reaction kettle can be overturned by 180 degrees in a reciprocating manner, so that the melt flowing speed is greatly increased, and compared with a common stirring manner, melt polycondensation operation can be promoted without dead angles; high-temperature steam can be introduced into the heat preservation cavity, so that the temperature of the reaction kettle is increased, and a good state of melt is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of PET material processing technology, specifically to a PET material melting and polycondensation equipment. Background Technology

[0002] PET is a milky white or light yellow, highly crystalline polymer with a smooth and glossy surface. It has excellent physical and mechanical properties over a wide temperature range, with a long-term operating temperature up to 120℃. It has excellent electrical insulation properties, and its electrical properties remain good even at high temperatures and high frequencies. However, it has poor corona resistance. It also has good creep resistance, fatigue resistance, abrasion resistance, and dimensional stability.

[0003] Polycondensation is a reversible polymerization reaction in which monomers gradually condense to form high molecular weight polymers. Currently, horizontal stirred reactors are commonly used for melt polycondensation in PET processing. The surface renewal frequency of such reactors is closely related to the contact between the stirring element and the material. However, in actual operation, no matter what shape the stirring element is, it is impossible to guarantee that it can contact all the raw materials. Moreover, due to the influence of gravity and the limitations of the reactor structure, the melt flow is poor, which results in insufficient melting and limits the surface renewal frequency of the melt, leaving room for improvement. Utility Model Content

[0004] This invention aims to solve the technical problems existing in the prior art, where melt polycondensation is limited by many factors and needs improvement, by providing a PET material melt polycondensation equipment.

[0005] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows: a PET material melting and polycondensation equipment, including a reactor and a silo; a bottom plate is provided under the reactor, and support legs are provided at the four corners of the bottom plate, with the silo located between the support legs; the reactor is composed of a reactor body and a cover body that are detachably connected; a conveying pipe is provided between the reactor body and the silo;

[0006] The bottom plate is provided with supporting side plates on its upper part and near both ends, and a flipping assembly is provided between the supporting side plates; the flipping assembly includes a motor provided on the outside of one of the supporting side plates, a rotating rod one connected to the vessel body at the output end of the motor, a rotating rod two provided on the other side of the vessel body, and the rotating rod two being rotatably connected to the other supporting side plate;

[0007] The inner side of the vessel is provided with an inner cylinder, and a heat preservation cavity is formed between the outer side of the inner cylinder and the inner side of the vessel; a Z-shaped transmission pipe is provided on the rear side of the first rotating rod, one end of the transmission pipe extends out of the support side plate, and the other end extends into the heat preservation cavity and is rotatably connected to it; a Z-shaped transmission pipe is provided on the front side of the second rotating rod, one end of the second transmission pipe extends out of the support side plate, and the other end extends into the inner cylinder and is rotatably connected to it.

[0008] Preferably, the hopper has a feed inlet on one side.

[0009] Preferably, the upper end of the vessel body and the lower end of the cover are provided with connecting flanges, which are connected by a number of bolts.

[0010] Preferably, the vessel body and the hopper are provided with threaded openings on the upper part and near the lower end; both ends of the conveying pipe are fixedly provided with threaded sleeves, and the threaded sleeves are threadedly connected to the threaded openings; a nut can be threadedly connected to the outside of each threaded opening.

[0011] Preferably, each of the support side plates is provided with a bearing that can be connected to rotating rod one and rotating rod two.

[0012] Preferably, each of the supporting side plates is provided with a bearing 2 that can be rotatably connected to the transmission pipe or the second transmission pipe.

[0013] Preferably, the inner cylinder is provided with a stirring structure, the stirring structure including a second motor at the lower end of the vessel body, a transmission rod at the output end of the second motor, the transmission rod extending into the inner cylinder and having an S-shaped stirring plate; the upper end of the stirring plate is provided with a mounting plate, the mounting plate being detachably connected to the cover.

[0014] The advantages of this invention compared to the prior art are as follows: the reactor can be rotated 180 degrees by means of two rotating rods and two supporting side plates, which greatly improves the melt flow rate. Compared with ordinary stirring methods, it can promote melting and polycondensation without dead angles. In addition, the heat preservation chamber can introduce high-temperature steam to increase the temperature of the reactor and ensure the good state of the melt. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the structure of the flipping component of this utility model.

[0017] Figure 3 This is a schematic cross-sectional view of the reaction vessel of this utility model.

[0018] Figure 4 This is a schematic diagram of the stirring structure of this utility model.

[0019] Figure 5 This is a side perspective view of the supporting side plate of this utility model.

[0020] As shown in the figure: 1. Reactor, 2. Hopper, 3. Base plate, 4. Support leg, 5. Reactor body, 6. Cover, 7. Connecting flange, 8. Conveying pipe, 9. Nut, 10. Supporting side plate, 11. Motor, 12. Rotating rod one, 13. Rotating rod two, 14. Bearing, 15. Inner cylinder, 16. Insulation cavity, 17. Transmission pipe, 18. Transmission pipe two, 19. Bearing two, 20. Motor two, 21. Stirring plate, 22. Mounting plate. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings.

[0022] Example 1, in conjunction with Appendix Figure 1 , 2 A PET material melting and polycondensation equipment includes a reactor 1 and a silo 2. The silo 2 has a feed inlet on one side for easy feeding. The reactor 1 has a bottom plate 3, and the bottom plate 3 has four support legs 4 at its four corners. The silo 2 is located between the support legs 4 and is placed longitudinally to save space. The reactor 1 is composed of a reactor body 5 and a cover 6 that are detachably connected to facilitate internal maintenance and cleaning. The upper end of the reactor body 5 and the lower end of the cover 6 are both provided with connecting flanges 7, which are connected by several bolts.

[0023] Combined with appendix Figure 1 , 3 A conveying pipe 8 is provided between the vessel body 5 and the silo 2; threaded openings are provided on the vessel body 5 and the silo 2 near the lower end; threaded sleeves are fixed at both ends of the conveying pipe 8, and the threaded sleeves are threadedly connected to the threaded openings; nuts 9 are threadedly connected to the outside of the threaded openings. When conveying materials, the two ends of the conveying pipe 8 are connected to the vessel body 5 and the silo 2 respectively. When not conveying materials, the threaded openings can be sealed by the nuts 9.

[0024] Combined with appendix Figure 1-5 The bottom plate 3 is provided with supporting side plates 10 on both sides, and a flipping assembly is provided between the supporting side plates 10. The flipping assembly includes a motor 11 on the outside of one of the supporting side plates 10, a rotating rod 12 connected to the vessel body 5 at the output end of the motor 11, and a rotating rod 13 on the other side of the vessel body 5. The rotating rod 13 is rotatably connected to the other supporting side plate 10. Each supporting side plate 10 is provided with a bearing 14 that can be connected to the rotating rod 12 and the rotating rod 13, so that the rotating rod 12 and the rotating rod 13 can rotate freely.

[0025] Combined with appendix Figure 1 , 3The inner side of the vessel body 5 is provided with an inner cylinder 15, and a heat preservation cavity 16 is formed between the outer side of the inner cylinder 15 and the inner side of the vessel body 5. A Z-shaped transmission pipe 17 is provided on the rear side of the rotating rod 12. One end of the transmission pipe 17 extends out of the support side plate 10, and the other end extends into the heat preservation cavity 16 and is rotatably connected to it. High-temperature steam can be introduced into the heat preservation cavity 16 through an external steam generator to keep the vessel body 5 warm. A Z-shaped transmission pipe 18 is provided on the front side of the rotating rod 13. One end of the transmission pipe 18 extends out of the support side plate 10, and the other end extends into the inner cylinder 15 and is rotatably connected to it, which facilitates the discharge of material. Each support side plate 10 is provided with a bearing 19 that can be rotatably connected to the transmission pipe 17 or the transmission pipe 18.

[0026] Combined with appendix Figure 4 The inner cylinder 15 is equipped with a stirring structure, which includes a motor 20 located at the lower end of the vessel body 5. The output end of the motor 20 is equipped with a transmission rod, which extends into the inner cylinder 15 and is equipped with an S-shaped stirring plate 21. While stirring, it has a shearing force, which can avoid the generation of stirring dead corners and material inertia, and improve the melting effect. The upper end of the stirring plate 21 is equipped with a mounting plate 22, which is detachably connected to the cover 6, so as not to affect the disassembly of the cover 6.

[0027] The working principle of this utility model is as follows: Material is fed from the hopper 2 into the inner cylinder 15 of the reactor body 5 through the conveying pipe 8. The conveying pipe 8 can be removed during the flipping process by directly removing the threaded sleeves 9 at both ends of the conveying pipe 8 from the threaded opening, thus avoiding twisting and entanglement. The end of the transmission pipe 17 is connected to an external steam generator, thereby introducing high-temperature steam into the insulation cavity 16 through the transmission pipe 17 for insulation of the reactor body 5. During the flipping process, the motor 11 drives the rotating rod 12 to rotate, thereby causing the reactor 1 and the rotating rod 13 to rotate 180 degrees between the two supporting side plates 10 and continue to rotate in the opposite direction, increasing the flow rate of the internal melt. During this process, the transmission pipe 17 and the second transmission pipe 18 are located behind and in front of the rotating rod 12 and the second rotating rod 13, respectively, and will not affect the rotation.

[0028] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A PET material melting and polycondensation apparatus, comprising a reactor (1) and a silo (2); characterized in that: The reactor (1) is provided with a bottom plate (3) and support legs (4) are provided at the four corners of the bottom plate (3). The hopper (2) is located between the support legs (4). The reactor (1) is composed of a reactor body (5) and a cover body (6) that are detachably connected. A conveying pipe (8) is provided between the reactor body (5) and the hopper (2). The bottom plate (3) is provided with supporting side plates (10) on its upper part and near both ends, and a flipping assembly is provided between the supporting side plates (10); the flipping assembly includes a motor (11) provided on the outside of one of the supporting side plates (10), the output end of the motor (11) is provided with a rotating rod (12) connected to the vessel body (5), and a rotating rod (13) is provided on the other side of the vessel body (5), and the rotating rod (13) is rotatably connected to the other supporting side plate (10); The inner side of the vessel body (5) is provided with an inner cylinder (15), and a heat preservation cavity (16) is formed between the outer side of the inner cylinder (15) and the inner side of the vessel body (5); a Z-shaped transmission pipe (17) is provided on the rear side of the first rotating rod (12), one end of the transmission pipe (17) extends out of the support side plate (10), and the other end extends into the heat preservation cavity (16) and is rotatably connected thereto; a Z-shaped transmission pipe (18) is provided on the front side of the second rotating rod (13), one end of the transmission pipe (18) extends out of the support side plate (10), and the other end extends into the inner cylinder (15) and is rotatably connected thereto.

2. The PET material melting and polycondensation equipment according to claim 1, characterized in that: The hopper (2) has a feed inlet on one side.

3. The PET material melting and polycondensation equipment according to claim 1, characterized in that: The upper end of the vessel body (5) and the lower end of the cover body (6) are both provided with connecting flanges (7), which are connected by several bolts.

4. The PET material melting and polycondensation equipment according to claim 1, characterized in that: The vessel body (5) and the hopper (2) are provided with threaded openings on the upper part and near the lower end; both ends of the conveying pipe (8) are fixedly provided with threaded sleeves, and the threaded sleeves are threadedly connected to the threaded openings; a nut (9) can be threadedly connected to the outside of the threaded openings.

5. The PET material melting and polycondensation equipment according to claim 1, characterized in that: Each of the support side plates (10) is provided with a bearing (14) that can be connected to the first rotating rod (12) and the second rotating rod (13).

6. The PET material melting and polycondensation equipment according to claim 1, characterized in that: Each of the support side plates (10) is provided with a bearing (19) that can be rotatably connected to the transmission pipe (17) or the second transmission pipe (18).

7. The PET material melting and polycondensation equipment according to claim 1, characterized in that: The inner cylinder (15) is provided with a stirring structure, which includes a second motor (20) provided at the lower end of the vessel body (5). The output end of the second motor (20) is provided with a transmission rod, which extends into the inner cylinder (15) and is provided with an S-shaped stirring plate (21). The upper end of the stirring plate (21) is provided with an mounting plate (22), which is detachably connected to the cover (6).

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