Novel chinlon 6 slice production system

Abstract

The utility model provides a novel nylon-6 chip production system which comprises a pre-polymerization tower, a mixing tank, a final polymerization tower and a filling separation tower, and a caprolactam and additive feeding pipe is arranged at the upper end of the pre-polymerization tower; a discharging pipe at the lower end of the pre-polymerization tower is connected with a feeding hole in the top of the final polymerization tower through a first discharging valve, a first gear pump, a first feeding pipe and a first control valve in sequence; a second feeding pipe is installed on the first feeding pipe, a manual valve, a flow meter and a second control valve are installed on the second feeding pipe, and the outlet end of the second control valve is connected with a feeding port in the top of the mixing tank; a filling separation tower is mounted at the top of the mixing tank, an additive feeding pipe is mounted at the top of the mixing tank, a stirrer and a heater are mounted in the mixing tank, and the heater is positioned below the stirrer; the lower end of the mixing tank is connected with the top of the final polymerization tower through a third discharge valve, a third gear pump and a third control valve in sequence. The device is reasonable in structural design, high in automation degree and beneficial to production of chinlon 6 slices.

Description

[Technical field]

[0001] The utility model relates to a novel nylon 6 slice production system. [Background technology]

[0002] Traditional nylon 6 chips are a kind of high molecular polymer, which is formed by the ring-opening polymerization of caprolactam. It has a molecular weight of over 20,000 and a decomposition temperature of over 270°C. It takes 100 to 200 years to self-degrade in the natural environment or seawater. As humans use more nylon 6 fiber fabrics and plastics, the amount of discarded nylon 6 fiber fabric clothes and plastic products has also increased significantly, causing pollution to the soil and oceans, especially the ocean, which has put a heavy burden on the marine ecological environment.

[0003] In view of the above problems, the present application provides a novel nylon 6 chip production system for producing nylon 6 chips with a microbial-friendly base. [Summary of the invention]

[0004] The technical problem to be solved by the utility model is to provide a novel nylon 6 slice production system, which has a reasonable structural design and a high degree of automation, and is conducive to the production of nylon 6 slices.

[0005] The utility model is achieved in this way:

[0006] A novel nylon 6 chip production system, the production system comprises a prepolymerization tower, a mixing tank, a final polymerization tower and a filling separation tower, a caprolactam and additive feed pipe is installed at the upper end of the prepolymerization tower, a first discharge valve is installed on the discharge pipe at the lower end of the prepolymerization tower, a first gear pump is installed at the outlet end of the first discharge valve, a first control valve is installed on the first feed pipe at the outlet end of the first gear pump, and the first control valve is installed near the top feed port of the final polymerization tower;

[0007] A second discharge valve is installed on the discharge pipe at the lower end of the final polymerization tower, a second gear pump is installed on the feed pipe at the outlet end of the second discharge valve, a melt filter is installed at the discharge end of the second gear pump, and the melt filter is connected to a pelletizer;

[0008] A second feeding pipe is installed on the first feeding pipe at the outlet end of the first gear pump, and a manual valve, a flow meter, and a second control valve are installed on the second feeding pipe, respectively, and the manual valve is installed at the inlet end of the flow meter, and the second control valve is installed at the outlet end of the flow meter, and the outlet end of the second control valve is connected to the top feed port of the mixing tank;

[0009] The filling separation tower is installed on the top of the mixing tank, an exhaust pipe is installed on the top of the filling separation tower, and a vacuum pump is installed on the exhaust pipe; an additive feeding pipe is installed on the top of the mixing tank, an agitator is installed in the mixing tank, a heater is provided in the mixing tank, and the heater is located below the agitator; a third discharge valve is installed on the discharge pipe at the lower end of the mixing tank, a third gear pump is installed at the outlet end of the third discharge valve, a third feeding pipe is installed at the outlet end of the third gear pump, a third control valve is installed on the third feeding pipe, the outlet end of the third control valve is connected to the top of the final polymerization tower, and the third control valve is close to the feed inlet at the top of the final polymerization tower;

[0010] An extraction tower, a drying tower, a cooling silo and a slicing silo are sequentially arranged at the rear end of the pelletizer; the pelletizer discharge end is connected to the extraction tower feed end, the extraction tower discharge end is connected to the drying tower feed end, the drying tower discharge end is connected to the cooling silo feed end, and the cooling silo discharge end is connected to the slicing silo.

[0011] Furthermore, the heater is a shell-and-tube heater.

[0012] Furthermore, the first gear pump is interlocked with the first control valve pressure signal.

[0013] Furthermore, the flow meter is interlocked with the flow signal of the second control valve.

[0014] Furthermore, the third gear pump is interlocked with the third control valve pressure signal.

[0015] Furthermore, a mixer is installed on the caprolactam and additive feeding pipe.

[0016] The utility model has the following advantages:

[0017] The prepolymerization tower provided in the utility model is used for the prepolymerization reaction of caprolactam and additives, and then the prepolymer after the reaction is respectively fed into the final polymerization tower and the mixing tank through the first feeding pipe and the second feeding pipe, and the prepolymer and the additive in the mixing tank are mixed and heated by the agitator and the heater, and the formed reactants are then fed into the final polymerization tower through the third feeding pipe, and finally the final polymerization tower is used for polymerization reaction to obtain the product; it can be seen that the production system of the utility model has reasonable structural design and high degree of automation, which is conducive to the production of nylon 6 chips.

Brief Description of the Drawings

[0018] The present invention will be further described below in conjunction with the embodiments with reference to the accompanying drawings.

[0019] Figure 1 It is a schematic diagram of a novel nylon 6 slice production system of the utility model.

[0020] The accompanying drawings are numbered as follows:

[0021] 1. Prepolymerization tower, 2. Mixing tank, 3. Final polymerization tower, 4. Filling separation tower, 5. Caprolactam and additive feeding pipe, 6. First discharge valve, 7. First gear pump, 8. First feeding pipe, 9. First control valve, 10. Second discharge valve, 11. Second gear pump, 12. Melt filter, 13. Pelletizer, 14. Second feeding pipe, 15. Manual valve, 16. Flow meter, 17. Second control valve, 18. Exhaust pipe, 19. Vacuum pump, 20. Additive feeding pipe, 21. Agitator, 22. Heater, 23. Third discharge valve, 24. Third gear pump, 25. Third feeding pipe, 26. Third control valve, 27. Extraction tower, 28. Drying tower, 29. Cooling silo, 30. Slicing silo, 31. Mixer. [Specific implementation method]

[0022] The following will be combined with the attached Figure 1 The technical scheme of the utility model is clearly and completely described in the specific implementation methods. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the utility model. If no specific conditions are specified in the embodiments, they are carried out according to conventional conditions or conditions recommended by the manufacturer. If the manufacturer of the reagents or instruments used is not specified, they are all conventional products that can be purchased commercially.

[0023] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] See also Figure 1The utility model relates to a novel nylon 6 chip production system, which comprises a prepolymerization tower 1, a mixing tank 2, a final polymerization tower 3 and a filling separation tower 4, a caprolactam and additive feeding pipe 5 is installed at the upper end of the prepolymerization tower 1, a first discharge valve 6 is installed on the discharge pipe at the lower end of the prepolymerization tower 1, a first gear pump 7 is installed at the outlet end of the first discharge valve 6, a first control valve 9 is installed on the first feeding pipe 8 at the outlet end of the first gear pump 7, and the first control valve 9 is installed near the top feed port of the final polymerization tower 3;

[0026] The discharge pipe at the lower end of the final polymerization tower 3 is equipped with a second discharge valve 10, the outlet end feed pipe of the second discharge valve 10 is equipped with a second gear pump 11, the discharge end of the second gear pump 11 is equipped with a melt filter 12, and the melt filter 12 is connected to a pelletizer 13;

[0027] A second feeding pipe 14 is installed on the first feeding pipe 8 at the outlet end of the first gear pump 7, and a manual valve 15, a flow meter 16, and a second control valve 17 are installed on the second feeding pipe 14, respectively, and the manual valve 15 is installed at the inlet end of the flow meter 16, and the second control valve 17 is installed at the outlet end of the flow meter 16, and the outlet end of the second control valve 17 is connected to the top feed port of the mixing tank 2;

[0028] The packed separation tower 4 is installed on the top of the mixing tank 2, and an exhaust pipe 18 is installed on the top of the packed separation tower 4, and a vacuum pump 19 is installed on the exhaust pipe 18; an additive feeding pipe 20 is installed on the top of the mixing tank 2, and an agitator 21 is installed in the mixing tank 2, and a heater 22 is provided in the mixing tank 2, and the heater 22 is located below the agitator 21; a third discharge valve 23 is installed on the discharge pipe at the lower end of the mixing tank 2, and a third gear pump 24 is installed at the outlet end of the third discharge valve 23, and a third feeding pipe 25 is installed at the outlet end of the third gear pump 24, and a third control valve 26 is installed on the third feeding pipe 25, and the outlet end of the third control valve 26 is connected to the top of the final polymerization tower 3, and the third control valve 26 is close to the top feed port of the final polymerization tower 3;

[0029] An extraction tower 27, a drying tower 28, a cooling silo 29 and a slicing silo 30 are sequentially arranged at the rear end of the pelletizer 13; the discharge end of the pelletizer 13 is connected to the feed end of the extraction tower 27, the discharge end of the extraction tower 27 is connected to the feed end of the drying tower 28, the discharge end of the drying tower 28 is connected to the feed end of the cooling silo 29, and the discharge end of the cooling silo 29 is connected to the slicing silo 30.

[0030] In a specific implementation, a preferred embodiment is that the heater 22 is a shell-and-tube heater.

[0031] In a specific implementation, a preferred embodiment is as follows: the first gear pump 7 and the first control valve 9 are provided with a pressure signal interlocking arrangement.

[0032] In a specific implementation, a preferred embodiment is that the flow meter 16 and the second control valve 17 are interlocked in flow signal.

[0033] In a specific implementation, a preferred embodiment is that the third gear pump 24 and the third control valve 26 are interlocked in pressure signal.

[0034] In a specific implementation, a preferred embodiment is as follows: a mixer 31 is installed on the caprolactam and additive feeding pipe 5 .

[0035] In another embodiment of the present invention, the process flow of the production system is as follows:

[0036] ① After the caprolactam and additives are uniformly mixed in a mixer, they enter the prepolymerization tower 1 from the caprolactam and additive inlet pipe 5, and chemically react in the prepolymerization tower 1 to generate prepolymers. A portion of the prepolymer is sent to the final polymerization tower 3 through the first discharge valve 6, the first gear pump 7, the first feed pipe 8, and the first control valve 9; another portion of about 5% to 10% of the prepolymer is sent to the mixing tank 2 through the manual valve 15, the second feed pipe 14, the flow meter 16, and the second control valve 17; the biophilic additive poly β-hydroxybutyrate is sent to the final polymerization tower 3 through the additive inlet The material pipe 20 enters the mixing tank 2, and the material is fully mixed by the agitator 21 in the mixing tank 2. The tube-type heater 22 in the mixing tank 2 heats the mixed material to 200-220°C. The pressure in the mixing tank 2 is controlled at 1-1.2 bar, and the excess water vapor is discharged through the filling separation tower 4 and the exhaust pipe 18. If the pressure is difficult to control at 1-1.2 bar, the vacuum pump 19 can be started to assist in exhaust pressure control. The material in the mixing tank 2 is kept heated and chemically reacted for about 20 hours.

[0037] ② The materials in the mixing tank 2 are fed into the final polymerization tower 3 through the third discharge valve 23 at the lower end, the third gear pump 24, the third feed pipe 25, and the third control valve 26.

[0038] ③ After the materials in the final polymerization tower 3 undergo polymerization reaction and chemical equilibrium (about 8 to 10 hours), a nylon 6 polymer melt containing a pro-microbial base is generated, and the nylon 6 polymer melt is discharged from the second discharge valve 10 at the lower end of the final polymerization tower 3, and then sent to the melt filter 12 by the second gear pump 11, and then sent to the pelletizer 13 after filtration to make wet chips, and the obtained wet chips are then extracted, dried and cooled in sequence to obtain bio-based nylon 6 chips, which are then sent to the spinning plant to be made into new nylon 6 fibers that can be decomposed by microorganisms.

[0039] In summary, the prepolymerization tower provided in the utility model is used for the prepolymerization reaction of caprolactam and additives, and then the prepolymer after the reaction is respectively fed into the final polymerization tower and the mixing tank through the first feeding pipe and the second feeding pipe, and the prepolymer and the additive in the mixing tank are mixed and heated by the agitator and the heater, and the formed reactants are then fed into the final polymerization tower through the third feeding pipe, and finally the final polymerization tower is used for polymerization reaction to obtain the product; it can be seen that the production system of the utility model has a reasonable structural design and a high degree of automation, which is conducive to the production of nylon 6 chips.

[0040] Although the specific implementation methods of the present invention are described above, those skilled in the art should understand that the specific embodiments described are only illustrative and are not intended to limit the scope of the present invention. Equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A new type of nylon 6 chip production system, Features: The production system comprises a prepolymerization tower, a mixing tank, a final polymerization tower and a filling separation tower, wherein a caprolactam and additive feed pipe is installed at the upper end of the prepolymerization tower, a first discharge valve is installed on a discharge pipe at the lower end of the prepolymerization tower, a first gear pump is installed at the outlet end of the first discharge valve, a first control valve is installed on a first feed pipe at the outlet end of the first gear pump, and the first control valve is installed near the top feed port of the final polymerization tower; A second discharge valve is installed on the discharge pipe at the lower end of the final polymerization tower, a second gear pump is installed on the feed pipe at the outlet end of the second discharge valve, a melt filter is installed at the discharge end of the second gear pump, and the melt filter is connected to a pelletizer; A second feeding pipe is installed on the first feeding pipe at the outlet end of the first gear pump, and a manual valve, a flow meter, and a second control valve are installed on the second feeding pipe, respectively, and the manual valve is installed at the inlet end of the flow meter, and the second control valve is installed at the outlet end of the flow meter, and the outlet end of the second control valve is connected to the top feed port of the mixing tank; The filling separation tower is installed on the top of the mixing tank, an exhaust pipe is installed on the top of the filling separation tower, and a vacuum pump is installed on the exhaust pipe; an additive feeding pipe is installed on the top of the mixing tank, an agitator is installed in the mixing tank, a heater is provided in the mixing tank, and the heater is located below the agitator; a third discharge valve is installed on the discharge pipe at the lower end of the mixing tank, a third gear pump is installed at the outlet end of the third discharge valve, a third feeding pipe is installed at the outlet end of the third gear pump, a third control valve is installed on the third feeding pipe, the outlet end of the third control valve is connected to the top of the final polymerization tower, and the third control valve is close to the feed inlet at the top of the final polymerization tower; An extraction tower, a drying tower, a cooling silo and a slicing silo are sequentially arranged at the rear end of the pelletizer; the pelletizer discharge end is connected to the extraction tower feed end, the extraction tower discharge end is connected to the drying tower feed end, the drying tower discharge end is connected to the cooling silo feed end, and the cooling silo discharge end is connected to the slicing silo.

2. A novel nylon 6 slice production system according to claim 1, Features: The heater is a tube-in-tube heater.

3. A novel nylon 6 slice production system according to claim 1, Features: The first gear pump is interlocked with the first control valve pressure signal.

4. A novel nylon 6 slice production system according to claim 1, Features: The flow meter is interlocked with the flow signal of the second control valve.

5. A novel nylon 6 chip production system according to claim 1, Features: The third gear pump is interlocked with the third control valve pressure signal.

6. A novel nylon 6 chip production system according to claim 1, Features: A mixer is installed on the caprolactam and additive feeding pipe.

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