Low-energy-consumption film-grade PETG (polyethylene terephthalate glycol) slice production device and method

Abstract

The invention relates to the technical field of PETG slice production, in particular to a low-energy-consumption film-grade PETG slice production device and method, and the device comprises a feeding unit, a polymerization reaction unit, a melt conveying unit, a cooling unit, a pelletizing unit and a control unit. All the units are connected with an automatic control system through pipelines, and high efficiency and energy conservation in the production process are achieved. The feeding unit accurately controls raw material mixing through a raw material supply device, a metering device and a mixing device; a reaction kettle and a catalyst supply device of the polymerization reaction unit ensure uniform and efficient reaction; the melt conveying unit adopts a melt pump and a heat preservation pipeline which are controlled by frequency conversion, so that energy consumption is reduced; the cooling unit realizes rapid and uniform cooling through a cooling water circulating device and a high-thermal-conductivity cooling roller; the pelletizing unit adopts a multi-blade cutter device and a high-precision screening device, so that the slicing quality is improved; the control unit realizes whole-process automation and energy consumption optimization through a central processing unit, a data acquisition module, a signal transceiver and a power management module.

Description

Technical Field

[0001] The invention belongs to the technical field of polyester material production, and specifically relates to a low-energy consumption film-grade PETG slice production device and method. Background Art

[0002] With the continuous development of polyester film material technology, PETG (polyethylene glycol terephthalate), as a high-performance non-crystalline polyester material, is widely used in packaging, electronic products and automotive industries due to its excellent transparency, impact resistance, chemical resistance and processability. However, the existing PETG slice production device and method still have some shortcomings in terms of energy consumption, production efficiency and slice quality, which affects the performance and production cost of the product.

[0003] After searching, the patent with publication number CN102660004B discloses a method for preparing PETG polyester modified by NPG and SiO2 copolymerization. The method has low production cost, easy raw materials and simple process. The prepared material is green, environmentally friendly, non-toxic, tasteless, easy to recycle, with good peeling characteristics, easy opening, lubrication and anti-sticking. The new ecological high-functional NPG and SiO2 copolymer modified PETG non-crystalline polymer material is suitable for the production of stretch film, blown film or thin film. However, although the method has low production cost, it does not specifically mention energy consumption control. In actual production, the energy consumption may be high, affecting the overall economy and environmental protection. And although the process is simple, the underwater cooling and pelletizing steps may require more complex equipment and control, affecting production efficiency.

[0004] After searching, the patent with publication number CN109251485B relates to a BOPET film for metal composite and its preparation method. The film is composed of an upper surface layer, a core layer and a lower surface layer. The BOPET film for metal composite has excellent performance in heat sealing, nominal strain at break, thermal shrinkage rate, etc., and has good composite fastness after thermal bonding with metal. Although the invention mentions excellent performance, it does not explain in detail the energy consumption control in the production process, which may lead to high energy consumption and affect production costs. The preparation process of the multi-layer structure is relatively complicated, and the equipment investment and maintenance costs are high, which increases the overall production cost. Problems of separation or unevenness between layers may occur during the slicing process of the multi-layer structure, affecting the performance and application effect of the final product.

[0005] The above problems indicate that the existing PETG slice production device and method still have certain deficiencies in terms of energy consumption control, production efficiency and slice quality. Therefore, the present invention provides a low-energy consumption film-grade PETG slice production device and method, aiming to optimize energy consumption control in the production process, simplify equipment complexity, and improve slice uniformity and quality, thereby meeting the market demand for efficient and low-cost PETG slices. Summary of the invention

[0006] The present invention provides a low-energy consumption film-grade PETG slice production device and method, which solves the shortcomings of the prior art such as high energy consumption, high equipment complexity, and uneven slice quality. The present invention aims to provide a new solution that is more energy-saving, efficient, and has high slice quality, so as to effectively improve the production efficiency and product quality of PETG slices.

[0007] The present invention provides a low-energy consumption film-grade PETG slice production device, comprising a feeding unit, a polymerization reaction unit, a melt conveying unit, a cooling unit, a pelletizing unit and a control unit. The feeding unit is connected to the polymerization reaction unit, the polymerization reaction unit is connected to the melt conveying unit, the melt conveying unit is connected to the cooling unit, the cooling unit is connected to the pelletizing unit, and the control unit is electrically connected to each unit to realize automatic control of the entire production process.

[0008] The feeding unit includes a raw material supply device, a metering device and a mixing device. The raw material supply device is used to provide raw materials such as terephthalic acid, neopentyl glycol, ethylene glycol, etc., the metering device is used to accurately measure the amount of raw materials added, and the mixing device is used to uniformly mix the raw materials. The raw material supply device and the metering device are connected to the mixing device through a pipeline to ensure uniform mixing of the raw materials.

[0009] The polymerization reaction unit includes a reactor and a catalyst supply device. The reactor is provided with a stirring device and a heating device for promoting the polymerization reaction of the raw materials. The catalyst supply device is used to add catalyst into the reactor, and the catalyst supply device is connected to the reactor through a pipeline. The temperature and pressure of the reactor are monitored in real time by a sensor and connected to a control unit to achieve precise control.

[0010] The melt conveying unit includes a melt pump and a melt pipeline. The melt pump is used to convey the melt after the polymerization reaction from the reactor to the cooling unit, and the melt pipeline is used to convey the melt. The melt pump adopts frequency conversion control to automatically adjust the speed according to the melt flow demand to reduce energy consumption. The melt pipeline is wrapped with insulation material to reduce heat loss.

[0011] The cooling unit includes a cooling water circulation device and a cooling roller. The cooling water circulation device is used to provide cooling water, and the cooling roller is used to uniformly cool the melt into a sheet. The cooling water circulation device is connected to the cooling roller through a pipeline, and the cooling roller is made of a high thermal conductivity material to ensure that the melt is quickly and evenly cooled. The cooling roller is provided with multiple cooling water inlets and outlets, and the cooling water flow rate is dynamically adjusted according to the melt flow rate and cooling requirements to further reduce energy consumption.

[0012] The pelletizing unit includes a cutter device and a screening device. The cutter device is used to cut the cooled flake melt into uniform slices. The cutter device adopts a multi-blade design to improve the efficiency and uniformity of slicing. The screening device is used to screen out unqualified slices to ensure the quality of slices. The cutter device and the screening device are connected by a conveyor belt to achieve continuous conveying and screening of slices.

[0013] The control unit includes a central processing unit, a data acquisition module, a signal transceiver and a power management module. The central processing unit is connected to the data acquisition module via a data bus, and the data acquisition module is connected to the sensors of each unit for real-time data collection during the production process. The signal transceiver is connected to the central processing unit for sending and receiving control instructions. The power management module is connected to the central processing unit for managing and allocating power to ensure the stable operation of each unit. The central processing unit adjusts the working parameters of each unit in real time according to the preset algorithm and logic to achieve optimization of the production process and energy consumption control.

[0014] The structural composition, implementation mode and operating principle of the present invention are as follows:

[0015] Feeding unit: The raw material supply device accurately measures the amount of raw materials added through the metering device, and the mixing device evenly mixes the raw materials through the stirring device. The mixed raw materials are transported to the polymerization reaction unit through the pipeline. The uniform mixing of raw materials is the key to ensure the smooth progress of the polymerization reaction.

[0016] Polymerization reaction unit: After the raw materials enter the reactor, polymerization reaction occurs under the action of the catalyst. The stirring device and heating device in the reactor ensure the uniformity and efficiency of the reaction. The temperature and pressure of the reactor are monitored in real time by sensors and connected to the control unit for precise control. The amount of catalyst added and the control of reaction conditions are important factors to ensure product quality.

[0017] Melt conveying unit: The melt pump conveys the melt after polymerization from the reactor to the cooling unit. The melt pump adopts frequency conversion control and automatically adjusts the speed according to the melt flow demand to reduce energy consumption. The melt pipeline is wrapped with insulation material to reduce heat loss and ensure stable delivery of the melt.

[0018] Cooling unit: The cooling water circulation device provides cooling water, and the cooling roller cools the melt evenly into flakes. The cooling water circulation device is connected to the cooling roller through a pipeline. The cooling roller is equipped with multiple cooling water inlets and outlets. The cooling water flow is dynamically adjusted according to the melt flow and cooling requirements to further reduce energy consumption. The high thermal conductivity material of the cooling roller and the dynamic cooling water flow adjustment are the key to ensuring uniform cooling of the melt.

[0019] Pelletizing unit: The cutter device cuts the cooled flake melt into uniform slices. The cutter device adopts a multi-blade design to improve the efficiency and uniformity of slicing. The screening device screens out unqualified slices to ensure the quality of slices. The cutter device and the screening device are connected by a conveyor belt to achieve continuous conveying and screening of slices. The multi-blade design of the cutter device and the high-precision screening of the screening device are the key to ensuring the quality of slices.

[0020] Control unit: The control unit collects data from the production process in real time through the data acquisition module. The central processor adjusts the working parameters of each unit in real time according to the preset algorithm and logic to achieve optimization of the production process and energy consumption control. The signal transceiver sends and receives control instructions, and the power management module ensures the stable operation of each unit. The real-time data acquisition and dynamic parameter adjustment of the control unit are the key to achieving optimization of the production process and energy consumption control.

[0021] The beneficial effects of the present invention are as follows:

[0022] The present invention significantly reduces energy consumption in the production process and realizes efficient use of energy through a frequency conversion-controlled melt pump and dynamically adjusted cooling water flow.

[0023] The present invention adopts a cutting device with a multi-blade design and a high-precision screening device, which ensures the uniformity and high quality of the slices and improves the market competitiveness of the product.

[0024] The present invention realizes automation and high efficiency of the entire production process through the automatic control unit and the optimized design of each unit, thereby significantly improving the production efficiency.

[0025] The present invention provides a low-energy consumption film-grade PETG slice production device and method, which effectively solves the problems of high energy consumption, high equipment complexity, uneven slice quality, etc. in the prior art by optimizing the design and implementation of each unit, and provides a strong guarantee for the efficient production and high quality of PETG slices. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the low-energy consumption film-grade PETG slice production device of the present invention;

[0027] Figure 2 It is a structural schematic diagram of the feeding unit;

[0028] Figure 3 It is a schematic structural diagram of a polymerization reaction unit;

[0029] Figure 4 It is a structural schematic diagram of a melt conveying unit;

[0030] Figure 5 is a schematic diagram of the structure of the cooling unit;

[0031] Figure 6 It is a schematic diagram of the structure of the pelletizing unit.

[0032] In the figure: 1. feeding unit; 2. polymerization reaction unit; 3. melt conveying unit; 4. cooling unit; 5. pelletizing unit; 6. control unit; 11. raw material supply device; 12. metering device; 13. mixing device; 21. reactor; 22. catalyst supply device; 23. stirring device; 24. heating device; 25. temperature sensor; 26. pressure sensor; 31. melt pump; 32. melt pipeline; 41. cooling water circulation device; 42. cooling roller; 43. cooling water inlet and outlet; 51. cutting device; 52. screening device; 53. conveyor belt; 61. central processing unit; 62. data acquisition module; 63. signal transceiver; 64. power management module. DETAILED DESCRIPTION

[0033] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0034] The embodiment of the present invention solves the shortcomings of the prior art such as high energy consumption, high equipment complexity, and uneven slice quality by providing a low-energy consumption film-grade PETG slice production device and method.

[0035] The present invention aims to provide a new solution which is more energy-saving, efficient and has high slice quality, so as to effectively improve the production efficiency and product quality of PETG slices.

[0036] See also Figures 1 to 6 A low-energy consumption film-grade PETG slice production device comprises a feeding unit 1, a polymerization reaction unit 2, a melt conveying unit 3, a cooling unit 4, a pelletizing unit 5 and a control unit 6. The feeding unit 1 is connected to the polymerization reaction unit 2, the polymerization reaction unit 2 is connected to the melt conveying unit 3, the melt conveying unit 3 is connected to the cooling unit 4, the cooling unit 4 is connected to the pelletizing unit 5, and the control unit 6 is electrically connected to each unit to realize the automatic control of the entire production process.

[0037] The feeding unit 1 includes a raw material supply device 11, a metering device 12 and a mixing device 13. The raw material supply device 11 is used to provide raw materials such as terephthalic acid, neopentyl glycol, ethylene glycol, etc., the metering device 12 is used to accurately measure the amount of raw materials added, and the mixing device 13 is used to evenly mix the raw materials. The raw material supply device 11 and the metering device 12 are connected to the mixing device 13 through a pipeline to ensure even mixing of the raw materials. The raw material supply device 11 and the metering device 12 are installed above the mixing device 13, and the raw materials are transported to the mixing device 13 through a pipeline. A stirring device is provided inside the mixing device 13 to ensure even mixing of the raw materials.

[0038] The polymerization reaction unit 2 includes a reactor 21 and a catalyst supply device 22. A stirring device 23 and a heating device 24 are provided in the reactor 21 to promote the polymerization reaction of the raw materials. The catalyst supply device 22 is used to add catalyst to the reactor 21, and the catalyst supply device 22 is connected to the reactor 21 through a pipeline. The temperature and pressure of the reactor 21 are monitored in real time by a temperature sensor 25 and a pressure sensor 26, and are connected to the control unit 6 to achieve precise control. The catalyst supply device 22 is installed above the reactor 21, and the catalyst is transported to the reactor 21 through a pipeline. The stirring device 23 and the heating device 24 are installed inside the reactor 21 to ensure the uniformity and efficiency of the reaction.

[0039] The melt conveying unit 3 includes a melt pump 31 and a melt pipe 32. The melt pump 31 is used to convey the melt after the polymerization reaction from the reactor 21 to the cooling unit 4, and the melt pipe 32 is used to convey the melt. The melt pump 31 adopts frequency conversion control, and automatically adjusts the speed according to the melt flow demand to reduce energy consumption. The melt pipe 32 is wrapped with insulation material to reduce heat loss. The melt pump 31 is installed below the reactor 21 and conveys the melt to the cooling unit 4 through a pipe. The melt pipe 32 is wrapped with insulation material to reduce heat loss.

[0040] The cooling unit 4 includes a cooling water circulation device 41 and a cooling roller 42. The cooling water circulation device 41 is used to provide cooling water, and the cooling roller 42 is used to uniformly cool the melt into a sheet. The cooling water circulation device 41 is connected to the cooling roller 42 through a pipeline, and the cooling roller 42 is made of a high thermal conductivity material to ensure that the melt is cooled quickly and evenly. A plurality of cooling water inlets and outlets 43 are provided on the cooling roller 42, and the cooling water flow rate is dynamically adjusted according to the melt flow rate and cooling requirements to further reduce energy consumption. The cooling water circulation device 41 is installed below the cooling roller 42, and the cooling water is transported to the cooling roller 42 through a pipeline. The cooling roller 42 is made of a high thermal conductivity material to ensure that the melt is cooled quickly and evenly.

[0041] The pelletizing unit 5 includes a cutter device 51 and a screening device 52. The cutter device 51 is used to cut the cooled flake melt into uniform slices. The cutter device 51 adopts a multi-blade design to improve the efficiency and uniformity of slicing. The screening device 52 is used to screen out unqualified slices to ensure the quality of slices. The cutter device 51 and the screening device 52 are connected by a conveyor belt 53 to achieve continuous transportation and screening of slices. The cutter device 51 is installed below the cooling roller 42, and the cooled flake melt is transported to the cutter device 51 for slicing through the conveyor belt 53. The screening device 52 is installed below the cutter device 51, and the slices are transported to the screening device 52 for screening through the conveyor belt 53.

[0042] The control unit 6 includes a central processor 61, a data acquisition module 62, a signal transceiver 63 and a power management module 64. The central processor 61 is connected to the data acquisition module 62 through a data bus, and the data acquisition module 62 is connected to the sensors of each unit for real-time data collection in the production process. The signal transceiver 63 is connected to the central processor 61 for sending and receiving control instructions. The power management module 64 is connected to the central processor 61 for managing and distributing power to ensure the stable operation of each unit. The central processor 61 adjusts the working parameters of each unit in real time according to the preset algorithm and logic to achieve optimization of the production process and energy consumption control. The central processor 61 is installed in the control cabinet, and the data acquisition module 62, the signal transceiver 63 and the power management module 64 are respectively connected to the central processor 61.

[0043] In specific operation, firstly, the raw materials such as terephthalic acid, neopentyl glycol, ethylene glycol are accurately measured and uniformly mixed through the feeding unit 1 and then sent to the reactor 21 of the polymerization reaction unit 2, and a polymerization reaction occurs under the action of the catalyst. The stirring device 23 and the heating device 24 in the reactor 21 ensure the uniformity and efficiency of the reaction. The temperature and pressure of the reactor 21 are monitored in real time by the temperature sensor 25 and the pressure sensor 26, and are connected to the control unit 6 to achieve precise control. The melt after the polymerization reaction is transported from the reactor 21 to the cooling roller 42 of the cooling unit 4 by the melt pump 31 for uniform cooling into a sheet. The melt pump 31 adopts frequency conversion control, and automatically adjusts the speed according to the melt flow demand to reduce energy consumption. The melt pipeline 32 is wrapped with insulation material to reduce heat loss. The cooled sheet melt is sent to the cutter device 51 of the pelletizing unit 5 through the conveyor belt 53 for slicing. The cutter device 51 adopts a multi-blade design to improve the efficiency and uniformity of slicing. The screening device 52 is used to screen out unqualified slices to ensure the quality of slicing. The entire production process is automatically controlled by the control unit 6. The central processor 61 collects data from each unit in real time through the data acquisition module 62, and adjusts the working parameters of each unit in real time according to the preset algorithm and logic to achieve optimization of the production process and energy consumption control.

[0044] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A low-energy consumption film-grade PETG slice production device, characterized in that: include: A feeding unit (1), wherein the feeding unit (1) comprises a raw material supply device (11), a metering device (12) and a mixing device (13); a polymerization reaction unit (2), wherein the polymerization reaction unit (2) comprises a reaction kettle (21) and a catalyst supply device (22), wherein the reaction kettle (21) is provided with a stirring device (23) and a heating device (24); a melt conveying unit (3), wherein the melt conveying unit (3) comprises a melt pump (31) and a melt pipeline (32); a cooling unit (4), wherein the cooling unit (4 ) comprises a cooling water circulation device (41) and a cooling roller (42), wherein the cooling roller (42) is provided with a plurality of cooling water inlets and outlets (43); a pelletizing unit (5), wherein the pelletizing unit (5) comprises a cutting device (51) and a screening device (52), wherein the cutting device (51) and the screening device (52) are connected via a conveyor belt (53); a control unit (6), wherein the control unit (6) comprises a central processing unit (61), a data acquisition module (62), a signal transceiver (63) and a power management module (64); The feeding unit (1) is connected to the polymerization reaction unit (2), the polymerization reaction unit (2) is connected to the melt conveying unit (3), the melt conveying unit (3) is connected to the cooling unit (4), the cooling unit (4) is connected to the pelletizing unit (5), and the control unit (6) is electrically connected to each unit.

2. A low-energy consumption film-grade PETG slice production device according to claim 1, characterized in that: The raw material supply device (11) and the metering device (12) are connected to the mixing device (13) through a pipeline, and a stirring device is provided inside the mixing device (13).

3. A low-energy consumption film-grade PETG slice production device according to claim 1, characterized in that: The catalyst supply device (22) is connected to the reaction kettle (21) through a pipeline. The temperature and pressure of the reaction kettle (21) are monitored in real time through a temperature sensor (25) and a pressure sensor (26), and are connected to a control unit (6).

4. A low-energy consumption film-grade PETG slice production device according to claim 1, characterized in that: The melt pump (31) is controlled by frequency conversion, and the melt pipeline (32) is wrapped with heat-insulating material.

5. A low-energy consumption film-grade PETG slice production device according to claim 1, characterized in that: The cooling water circulation device (41) is connected to the cooling roller (42) through a pipeline, and the cooling roller (42) is made of a high thermal conductivity material.

6. A low-energy consumption film-grade PETG slice production device according to claim 1, characterized in that: The cutting device (51) adopts a multi-blade design, and the screening device (52) is used to screen out unqualified slices.

7. A low-energy consumption film-grade PETG slice production device according to claim 1, characterized in that: The central processor (61) is connected to a data acquisition module (62) via a data bus, the data acquisition module (62) is connected to sensors of each unit, the signal transceiver (63) is connected to the central processor (61), and the power management module (64) is connected to the central processor (61).

8. A method for producing low-energy consumption film-grade PETG slices, characterized in that: The following steps are involved: The raw materials such as terephthalic acid, neopentyl glycol, ethylene glycol, etc. are accurately measured and uniformly mixed through the feeding unit (1) and then fed into the reaction kettle (21) of the polymerization reaction unit (2); Under the action of the catalyst, the raw materials in the reactor (21) undergo a polymerization reaction, and the stirring device (23) and the heating device (24) in the reactor (21) ensure the uniformity and high efficiency of the reaction; The melt after the polymerization reaction is transported from the reaction kettle (21) to the cooling roller (42) of the cooling unit (4) through the melt pump (31) to be uniformly cooled into a sheet; The cooled flaky melt is conveyed to a cutting device (51) of a pelletizing unit (5) through a conveyor belt (53) for slicing. The cutting device (51) adopts a multi-blade design to improve slicing efficiency and uniformity. The screening device (52) is used to screen out unqualified slices to ensure the quality of the slices; The entire production process is automatically controlled by the control unit (6); the central processor (61) collects data from each unit in real time through the data acquisition module (62), and adjusts the working parameters of each unit in real time according to the preset algorithm and logic.

9. A method for producing low-energy consumption film-grade PETG slices according to claim 8, characterized in that: The melt pump (31) is controlled by frequency conversion and automatically adjusts the rotation speed according to the melt flow demand. The melt pipeline (32) is wrapped with heat-insulating material to reduce heat loss.

10. A method for producing low-energy consumption film-grade PETG slices according to claim 8, characterized in that: The cooling water circulation device (41) is connected to the cooling roller (42) through a pipeline. The cooling roller (42) is provided with a plurality of cooling water inlets and outlets (43) to dynamically adjust the cooling water flow rate according to the melt flow rate and cooling requirements.

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