Polycondensation kettle device for regenerated DMT and copolyester thereof

Abstract

The utility model relates to the technical field of polycondensation kettles, and discloses a polycondensation kettle device for regenerated DMT and copolyester thereof, which comprises a polycondensation kettle body, a cooling mechanism arranged at the upper end of the polycondensation kettle body, an alarm arranged at the upper end of the cooling mechanism, a pressure relief mechanism arranged at the upper end of the polycondensation kettle body, and a temperature sensor arranged inside the polycondensation kettle body, materials are fed from the feeding pipe, then the stirring motor is started, the connecting shaft can be driven to rotate, the stirring rod is made to rotate, the materials can be stirred, in the reaction process, the temperature sensor can monitor the temperature in the polycondensation kettle body, when the temperature reaches a set threshold value, the alarm can give an alarm, then the pump body is started, and the stirring motor is started to drive the connecting shaft to rotate. The cooling liquid can be pumped out and flows into the cooling channel through the connecting bent pipe, the polycondensation kettle body can be cooled, overheating is avoided, the safety and stability of the production process cannot be affected, and the used cooling liquid can be discharged from the discharge pipe by starting the valve A.

Description

Technical Field

[0001] The utility model relates to the technical field of polycondensation kettles, and particularly relates to a polycondensation kettle device for regenerated DMT and its copolyesters. Background Technique

[0002] The polycondensation kettle device for regenerated DMT (dimethyl terephthalate) and its copolyesters is usually used for the polymerization reaction in the polyester production process. DMT and other comonomers are put into the reaction kettle; it is heated to a set temperature, and at the same time, stirring is carried out to promote the reaction; under high temperature and appropriate pressure, DMT reacts with other monomers to generate polyester; the water and other volatiles generated by the reaction are extracted by vacuum or inert gas to promote the reaction to proceed in the direction of the product. After the reaction is completed, the polymer can be discharged from the kettle.

[0003] For example, a polycondensation kettle with the publication number of CN216727238U includes a kettle body and an additive pipeline. A reaction chamber is arranged inside the kettle body; the additive pipeline is arranged in the reaction chamber. The additive pipeline is provided with a feed port end and a discharge port end. The feed port end extends out from the upper part of the kettle body, and the discharge port end extends downward to the bottom of the reaction chamber, and the discharge port end is arranged upward. When adding additives, the additives are added from the feed port end, and the additives flow downward along the additive pipeline, and then are sprayed upward from the discharge port end. In this way, it can be avoided that the additives directly spray onto the inner wall of the reaction chamber, and it can also be avoided that the additives drip onto the liquid surface of the reaction chamber and splash. In addition, the reaction materials in the reaction chamber also play a role in blocking and buffering the additives.

[0004] In the above patent, it is proposed that the conical second material guiding part can be set to mainly guide and buffer the put reaction materials. However, during the use of the polycondensation kettle device, since heating is required during the processing of regenerated DMT and its copolyesters, it is inconvenient to control the reaction temperature. If the temperature is too high, it will affect the reaction and the safety and stability of the production process.

[0005] Therefore, we propose a polycondensation kettle device for regenerated DMT and its copolyesters to solve the above-mentioned problems. Summary of the Invention

[0006] The purpose of the utility model is to provide a polycondensation kettle device for regenerated DMT and its copolyesters to solve the problem proposed in the above background technique that since heating is required during the processing of regenerated DMT and its copolyesters, it is inconvenient to control the reaction temperature. If the temperature is too high, it will affect the reaction and the safety and stability of the production process.

[0007] To achieve the above object, the present utility model provides the following technical solutions: A polycondensation kettle device for regenerated DMT and its copolyester, including a polycondensation kettle body, a cooling mechanism is provided at the upper end of the polycondensation kettle body, an alarm for alarming is provided at the upper end of the cooling mechanism, and a pressure relief mechanism is further provided at the upper end of the polycondensation kettle body. The pressure relief mechanism is used to discharge the gas in the polycondensation kettle body, which can achieve the purpose of pressure relief. A temperature sensor is provided inside the polycondensation kettle body, and the temperature sensor is used to monitor the temperature inside the polycondensation kettle body, and the temperature sensor is signal-connected to the alarm;

[0008] The cooling mechanism includes a cooling box and a pump body arranged inside the cooling box. There is a coolant inside the cooling box. One end interface of the pump body is connected with a connecting elbow. A cooling channel is opened inside the polycondensation kettle body. The other end of the connecting elbow communicates with the cooling channel. A discharge pipe is further provided at the lower end of the polycondensation kettle body, and the discharge pipe communicates with the cooling channel. When the pump body is started, the coolant can be pumped out and flow through the connecting elbow into the cooling channel, which can cool the polycondensation kettle body and avoid overheating.

[0009] Preferably, three supporting pedestals are provided at the lower end of the polycondensation kettle body.

[0010] Preferably, a feed pipe is provided at the top end of the polycondensation kettle body, a pipe cap is provided at the opening of the feed pipe, a stirring motor is provided at the top end of the polycondensation kettle body, the output end of the stirring motor is connected with a connecting shaft, and a plurality of stirring rods are evenly distributed on the outer side of the connecting shaft. A discharge pipe for discharging materials is provided at the lower end of the polycondensation kettle body. When the stirring motor is started, the connecting shaft can be driven to rotate.

[0011] Preferably, a valve A for control is provided on the outer side of the discharge pipe. Starting the valve A can make the coolant discharge from the discharge pipe.

[0012] Preferably, the pressure relief mechanism includes a pressure relief pipe and a valve B provided on the outer side of the pressure relief pipe. An activated carbon adsorption layer and a filter screen are provided inside the pressure relief pipe, and the activated carbon adsorption layer is used to adsorb the gas.

[0013] Preferably, the bottom of the pressure relief pipe is placed inside the polycondensation kettle body, so that the gas generated inside the polycondensation kettle body enters the pressure relief pipe. When the valve B is started, the gas can be discharged from the pressure relief pipe to achieve the purpose of pressure relief.

[0014] Compared with the prior art, the beneficial effects of the present utility model are:

[0015] 1. By setting the polycondensation kettle body, cooling mechanism, temperature sensor and alarm, the polycondensation kettle body is used to process the materials, and the temperature sensor is used for temperature detection. When the temperature exceeds, the alarm is used for reminder, and then the cooling mechanism is used to cool the polycondensation kettle body. The heat can be taken away by the coolant to avoid overheating and affecting the reaction process.

[0016] 2. Through the provided pressure relief mechanism, the gas in the polycondensation kettle body can be discharged to release pressure. At the same time, the discharged gas can be filtered and adsorbed to reduce the impact on the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic three-dimensional structure diagram of the whole of the present utility model;

[0018] Figure 2 It is a schematic plan view of the structure of the cooling mechanism of the present utility model;

[0019] Figure 3 It is a schematic three-dimensional structure diagram of the polycondensation kettle body of the present utility model;

[0020] Figure 4 It is a schematic three-dimensional structure diagram of the pressure relief mechanism of the present utility model.

[0021] In the figure: 1. Polycondensation kettle body; 11. Feed pipe; 12. Pipe cover; 13. Stirring motor; 14. Connecting shaft; 15. Stirring rod; 16. Discharge pipe; 2. Support; 3. Cooling mechanism; 31. Cooling box; 32. Pump body; 33. Connecting elbow; 34. Cooling channel; 35. Discharge pipe; 36. Valve A; 4. Pressure relief mechanism; 41. Pressure relief pipe; 42. Valve B; 43. Activated carbon adsorption layer; 44. Filter screen; 5. Alarm; 6. Temperature sensor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0023] Embodiment 1: Please refer to Figure 1 , Figure 2 and Figure 3 , a polycondensation kettle device for regenerated DMT and its copolyester, including a polycondensation kettle body 1. A cooling mechanism 3 is provided at the upper end of the polycondensation kettle body 1. An alarm 5 for alarming is provided at the upper end of the cooling mechanism 3. A pressure relief mechanism 4 is also provided at the upper end of the polycondensation kettle body 1. The pressure relief mechanism 4 is used to discharge the gas in the polycondensation kettle body 1, which can achieve the purpose of pressure relief. A temperature sensor 6 is provided inside the polycondensation kettle body 1. The temperature sensor 6 is used to monitor the temperature inside the polycondensation kettle body 1, and the temperature sensor 6 is signal-connected to the alarm 5. The temperature sensor 6 can monitor the temperature inside the polycondensation kettle body 1. When the temperature reaches the set threshold, the alarm 5 can give a reminder;

[0024] The cooling mechanism 3 includes a cooling tank 31 and a pump body 32 disposed inside the cooling tank 31. The inside of the cooling tank 31 is provided with a coolant. One end interface of the pump body 32 is connected to a connecting elbow 33. A cooling channel 34 is opened inside the polycondensation kettle body 1. The other end of the connecting elbow 33 communicates with the cooling channel 34. A discharge pipe 35 is further provided at the lower end of the polycondensation kettle body 1. The discharge pipe 35 communicates with the cooling channel 34. When the pump body 32 is started, the coolant can be pumped out, flow through the connecting elbow 33 into the cooling channel 34, and the polycondensation kettle body 1 can be cooled down to avoid overheating.

[0025] Three groups of supports 2 for support are provided at the lower end of the polycondensation kettle body 1. The three groups of supports 2 are evenly distributed at the lower end of the polycondensation kettle body 1, and the support is relatively stable.

[0026] A feed pipe 11 is provided at the top end of the polycondensation kettle body 1. A pipe cap 12 is provided at the opening of the feed pipe 11. A stirring motor 13 is provided at the top end of the polycondensation kettle body 1. The output end of the stirring motor 13 is connected to a connecting shaft 14. A plurality of stirring rods 15 are evenly distributed on the outer side of the connecting shaft 14. A discharge pipe 16 for discharging materials is provided at the lower end of the polycondensation kettle body 1. When the stirring motor 13 is started, the connecting shaft 14 can be driven to rotate, so that the stirring rods 15 rotate, and the materials can be stirred.

[0027] A valve A36 for control is provided on the outer side of the discharge pipe 35. When the valve A36 is started, the coolant can be discharged from the discharge pipe 35.

[0028] In this embodiment: The materials are put into the feed pipe 11, and then the stirring motor 13 is started. The connecting shaft 14 can be driven to rotate, so that the stirring rods 15 rotate, and the materials can be stirred. During the reaction process, the temperature sensor 6 can monitor the temperature inside the polycondensation kettle body 1. When the temperature reaches the set threshold value, the alarm 5 can give a reminder. Then the pump body 32 is started, and the coolant can be pumped out, flow through the connecting elbow 33 into the cooling channel 34, and the polycondensation kettle body 1 can be cooled down. The heat can be quickly removed to avoid overheating, which will not affect the safety and stability of the production process. And the valve A36 is started, and the used coolant can be discharged from the discharge pipe 35.

[0029] Embodiment 2: This embodiment is an improvement made on the basis of Embodiment 1. Specifically, please refer to Figure 4 , the pressure relief mechanism 4 includes a pressure relief pipe 41 and a valve B42 provided on the outer side of the pressure relief pipe 41. An activated carbon adsorption layer 43 and a filter screen 44 are provided inside the pressure relief pipe 41. The activated carbon adsorption layer 43 is used for adsorbing gases.

[0030] The bottom of the pressure relief pipe 41 is placed inside the polycondensation kettle body 1, so that the gas generated inside the polycondensation kettle body 1 enters the pressure relief pipe 41. When the valve B42 is opened, the gas can be discharged from the pressure relief pipe 41 to achieve the purpose of pressure relief.

[0031] In this embodiment: When the temperature is too high, the valve B42 can be opened, and the gas can be discharged from the pressure relief pipe 41, which can release the excess pressure to achieve the purpose of pressure relief. At the same time, when discharging the gas, the activated carbon adsorption layer 43 and the filter screen 44 can be used to adsorb and filter the gas to reduce the environmental pollution caused by gas discharge.

[0032] Working principle: The material is put into the feeding pipe 11, and then the stirring motor 13 is started, which can drive the connecting shaft 14 to rotate, so that the stirring rod 15 rotates, and the material can be stirred. During the reaction process, the temperature sensor 6 can monitor the temperature inside the polycondensation kettle body 1. When the temperature reaches the set threshold, the alarm 5 can be used to give a reminder. Then the pump body 32 is started, and the coolant can be pumped out and flow through the connecting elbow 33 into the cooling channel 34 to cool the polycondensation kettle body 1. And the valve A36 is opened, and the used coolant can be discharged from the discharge pipe 35. When the temperature is too high, the valve B42 can be opened, and the gas can be discharged from the pressure relief pipe 41, which can release the excess pressure to achieve the purpose of pressure relief. At the same time, when discharging the gas, the activated carbon adsorption layer 43 and the filter screen 44 can be used to adsorb and filter the gas.

[0033] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0034] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A polycondensation kettle device for regenerating DMT and its copolyester, including a polycondensation kettle body (1), characterized in that: A cooling mechanism (3) is provided at the upper end of the polycondensation kettle body (1). An alarm (5) for alarming is provided at the upper end of the cooling mechanism (3). A pressure relief mechanism (4) is also provided at the upper end of the polycondensation kettle body (1). The pressure relief mechanism (4) is used to discharge the gas in the polycondensation kettle body (1) to achieve the purpose of pressure relief. A temperature sensor (6) is provided inside the polycondensation kettle body (1). The temperature sensor (6) is used to monitor the temperature inside the polycondensation kettle body (1), and the temperature sensor (6) is signal-connected to the alarm (5). The cooling mechanism (3) includes a cooling box (31) and a pump body (32) provided inside the cooling box (31). A coolant is provided inside the cooling box (31). One end interface of the pump body (32) is connected to a connecting elbow (33). A cooling channel (34) is provided inside the polycondensation kettle body (1). The other end of the connecting elbow (33) communicates with the cooling channel (34). A discharge pipe (35) is also provided at the lower end of the polycondensation kettle body (1). The discharge pipe (35) communicates with the cooling channel (34).

2. The polycondensation kettle device for regenerated DMT and its copolyester according to claim 1, characterized in that: Three groups of supports (2) for support are provided at the lower end of the polycondensation kettle body (1).

3. A polycondensation kettle device for regenerated DMT and its copolyester according to claim 2, characterized in that: A feed pipe (11) is provided at the top end of the polycondensation kettle body (1). A pipe cap (12) is provided at the opening of the feed pipe (11). A stirring motor (13) is provided at the top end of the polycondensation kettle body (1). The output end of the stirring motor (13) is connected to a connecting shaft (14). A number of stirring rods (15) are evenly distributed on the outer side of the connecting shaft (14). A discharge pipe (16) for discharging materials is provided at the lower end of the polycondensation kettle body (1).

4. A polycondensation kettle device for regenerating DMT and its copolyester according to claim 3, characterized in that: A valve A (36) for control is provided on the outer side of the discharge pipe (35). Starting the valve A (36) can discharge the coolant from the discharge pipe (35).

5. A polycondensation kettle device for regenerating DMT and its copolyester according to claim 4, characterized in that: The pressure relief mechanism (4) includes a pressure relief pipe (41) and a valve B (42) provided on the outer side of the pressure relief pipe (41). An activated carbon adsorption layer (43) and a filter screen (44) are provided inside the pressure relief pipe (41). The activated carbon adsorption layer (43) is used to adsorb the gas.

6. A polycondensation kettle device for regenerated DMT and its copolyester according to claim 5, characterized in that: The bottom of the pressure relief pipe (41) is placed inside the polycondensation kettle body (1) so that the gas generated inside the polycondensation kettle body (1) enters the pressure relief pipe (41).

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