Control method, system, equipment and medium for reducing generation of debris and tailing particles

Abstract

The invention discloses a control method, system and equipment for reducing generation of chippings and trailing particles and a medium. The method comprises the steps that a plurality of main influence parameters causing generation of the chippings and the trailing particles in the polypropylene production process are obtained through analysis; taking any one of the plurality of main influence parameters as a control variable, taking the other main influence parameters as invariants, and generating a plurality of groups of control parameter sets; a plurality of groups of control parameter sets are used as control parameters of the polypropylene production process, a plurality of groups of corresponding polypropylene generation experiments are carried out, a plurality of groups of experimental data containing the generation amount of chippings and trailing particles are obtained, and in each group of experiments, cutters used for pelletizing are made of the same material; comparing each group of experimental data, and determining an optimal control parameter set for controlling the polypropylene production process; furthermore, the polypropylene production process is improved by additionally arranging a suction system and an additive pipeline oscillator, so that the output of tailing particles and chippings is effectively reduced.

Description

Technical Field

[0001] The present application relates to the technical field of polypropylene pellet production, and particularly relates to a control method, system, device and medium for reducing the generation of debris and trailing pellets. Background Art

[0002] Polypropylene is a high molecular polymer formed by the polymerization reaction of propylene monomers under the action of a catalyst, and is an important product among general plastics. It has pure texture, non-toxicity, low relative density, high heat resistance, good chemical resistance, good mechanical properties, and good injection molding properties.

[0003] With the fierce market competition, downstream users have more choices, and the requirements for the quality of polypropylene products are becoming more and more stringent. Not only are the performance indicators such as tensile elastic modulus, ash content, isotacticity, and film haze of the products required to meet the standards, but also higher requirements are put forward for the appearance of the products such as large and small pellets and colored pellets, especially the index of trailing pellets. The appearance of trailing pellets in the product is one of the reasons for the loss of downstream users. Trailing pellets refer to the particles with conical angles and burrs caused by poor pellet cutting. When the trailing is more serious, the particles will have a "tail" like a tadpole. A small number of trailing pellets with short "tails" will not have a direct impact on the use of downstream users. However, when trailing pellets are generated, a large amount of debris is mostly generated at the same time, and if the "tail" of the trailing pellet is long, it may entangle and knot during the conveying process, resulting in blockage of equipment such as pipelines and filters; in traditional industries, polypropylene is mainly used in industries such as injection molding and wire drawing. Trailing pellets and debris have little impact on product performance and appearance, and the requirements for particle appearance are relatively low. In the emerging film drawing industry, trailing pellets and debris have a greater impact on product performance. Especially in the field of use of ultra-low ash polypropylene electrical film materials, due to the extremely thin thickness of the electrical film materials, reaching the micron level, trailing materials and debris are likely to generate crystal points on the film materials, affecting the film forming quality and thus affecting the user experience.

[0004] Therefore, there is an urgent need to design a control method for reducing the generation of debris and trailing pellets during the production of polypropylene. Summary of the Invention

[0005] The present application provides a control method, system, device and medium for reducing the generation of debris and trailing pellets, which are used to obtain the optimal control parameters in the polypropylene production process, thereby reducing the generation amount of trailing pellets and debris.

[0006] In view of this, the first aspect of the present application provides a control method for reducing the generation of debris and trailing pellets, and the method includes:

[0007] Obtaining several main influencing parameters that cause the generation of debris and trailing pellets in the polypropylene production process through analysis;

[0008] Take any one of several of the main influencing parameters as a control variable, and the remaining main influencing parameters as invariant quantities to generate several sets of control parameter sets;

[0009] Use several sets of the control parameter sets as the control parameters for the polypropylene production process, and conduct corresponding several sets of polypropylene generation experiments respectively to obtain several sets of experimental data including the generation amounts of fines and trailing particles. Among them, the cutting tool materials used in each group of experiments are the same;

[0010] Compare the experimental data of each group to determine the optimal control parameter set, and use the optimal control parameter set to control the polypropylene production process.

[0011] Optionally, several of the main influencing parameters include: barrel temperature, die temperature, and pelletizing water temperature.

[0012] Optionally, it further includes: during the polypropylene production process, a suction system is set up to adsorb and remove the fines in the silo.

[0013] Optionally, it further includes: during the polypropylene production process, an additive pipeline oscillator is set up to knock on the additive pipeline during the additive addition process.

[0014] Optionally, it further includes: during the polypropylene generation, monitor the operating parameters of the production system and give a reminder by setting data deviation alarms.

[0015] Optionally, the adsorbing and removing the fines in the silo by adding a suction system includes:

[0016] Set different pressure operation modes for the suction system to start or stop according to the number of trailing particles per unit weight to adsorb and remove the fines in the silo.

[0017] Optionally, the cutting tool material is: Fe-TiC cermet composite pelletizing cutter.

[0018] The second aspect of this application provides a control system for reducing the generation of fines and trailing particles. The system includes:

[0019] An analysis unit for obtaining several main influencing parameters that cause the generation of fines and trailing particles during the polypropylene production process through analysis;

[0020] A generating unit for taking any one of several of the main influencing parameters as a control variable, and the remaining main influencing parameters as invariant quantities to generate several sets of control parameter sets;

[0021] A control unit, which uses several sets of the control parameter sets as the control parameters for the polypropylene production process, and respectively conducts corresponding several sets of polypropylene generation experiments to obtain several sets of experimental data including the generation amounts of debris and trailing pellets, wherein the cutting tool materials used for pelletizing in each group of experiments are the same;

[0022] A comparison unit, which is used to compare the experimental data of each group, determine the optimal control parameter set, and use the optimal control parameter set to control the polypropylene production process.

[0023] The third aspect of the present application provides a control device for reducing the generation of debris and trailing pellets. The device includes a processor and a memory:

[0024] The memory is used to store program codes and transmit the program codes to the processor;

[0025] The processor is used to execute the steps of the control method for reducing the generation of debris and trailing pellets as described in the first aspect above according to the instructions in the program codes.

[0026] The fourth aspect of the present application provides a computer-readable storage medium, which is used to store program codes, and the program codes are used to execute the control method for reducing the generation of debris and trailing pellets as described in the first aspect above.

[0027] It can be seen from the above technical solutions that the present application has the following advantages:

[0028] The present application provides a control method for reducing the generation of debris and trailing pellets. By analyzing, several main influencing parameters that cause the generation of debris and trailing pellets in the polypropylene production process are obtained; any one of the several main influencing parameters is used as a control variable, and the remaining main influencing parameters are invariant, generating several sets of control parameter sets; several sets of control parameter sets are used as the control parameters for the polypropylene production process, and corresponding several sets of polypropylene generation experiments are respectively conducted to obtain several sets of experimental data including the generation amounts of debris and trailing pellets, wherein the cutting tool materials used for pelletizing in each group of experiments are the same; the experimental data of each group are compared to determine the optimal control parameter set, and the optimal control parameter set is used to control the polypropylene production process; further, the polypropylene production process is improved by adding a suction system and an additive pipeline oscillator, thereby effectively reducing the generation amounts of trailing pellets and debris. Description of the Drawings

[0029] Figure 1 It is a schematic flowchart of a control method for reducing the generation of debris and trailing pellets provided in an embodiment of the present application;

[0030] Figure 2This is a schematic structural diagram of a control system for reducing the generation of debris and trailing particles provided in the embodiments of the present application. Detailed implementation manners

[0031] In order to enable those skilled in the art to better understand the solution of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present application.

[0032] Please refer to Figure 1 , a control method for reducing the generation of debris and trailing particles provided in the embodiments of the present application, includes:

[0033] Step 101: Obtain several main influencing parameters that cause the generation of debris and trailing particles during the polypropylene production process through analysis.

[0034] It should be noted that the inventor obtained through actual observation and analysis that the generation of trailing particles is mainly due to the fact that the cutter cannot cut the particles cleanly, and the uncompletely cut part is finally pulled off by the force of the cutter, resulting in a wire-shaped "tail" on the particles. The main reasons for the inability to completely cut the particles are as follows:

[0035] (1) The settings of parameters such as the barrel temperature, die temperature, and pelletizing water temperature are unreasonable. The PP particles extruded from the die cannot be cooled by the pelletizing water to a hardness that is easily cut by the cutter, resulting in the particles not being completely cut and trailing particles being generated.

[0036] a. The fluidity of the molten state of polypropylene powder is closely related to the barrel temperature. Too low a temperature will cause too high a pressure before the screen, which is not conducive to the stable operation of the extruder. Too high a temperature will cause the product to degrade. The barrel temperature is controlled at 220°C - 250°C.

[0037] b. The die temperature directly affects whether the molten material can smoothly pass through the forming channels of the pelletizing die. If the die temperature is too high or too low, there will be an increase in sheet materials and stringing materials, ultimately resulting in an increase in debris. The die temperature is controlled at 190°C - 230°C.

[0038] c. An appropriate pelletizing water temperature can optimize the particle shape. If the pelletizing water temperature is too high, the cooling after pelletizing is not timely, and it is easy to have stringing and sticking, which may cause accidents such as knife entanglement and enema. If the pelletizing water temperature is too low, the resin will become brittle and the debris will increase. The pelletizing water temperature is controlled at 55°C - 70°C.

[0039] (2) The sharpness of the cutting blade is insufficient. During the use of the cutting blade, small nicks will gradually appear on the cutting edge. The parts with nicks cannot be completely attached to the template, and the particles cannot be completely cut off, resulting in trailing particles.

[0040] (3) Affected by the fluctuation of the additive system, the fluctuation of the additive flow rate will cause a large change in the melt index of the pellets. Limited by the control parameters of the extruder, the mixing effect of the pellets is affected, resulting in debris and trailing materials during pelletizing.

[0041] In summary, changes in parameters such as the cutting blade material, additive addition amount, barrel temperature, die temperature, and pelletizing water temperature will all have a certain impact on the generation of trailing particles.

[0042] In this application, the barrel temperature, die temperature, and pelletizing water temperature are used as the main influencing parameters for the control research on reducing the generation of debris and trailing particles.

[0043] Step 102: Take any one of several main influencing parameters as the control variable, and the remaining main influencing parameters as invariant quantities to generate several sets of control parameter sets.

[0044] It should be noted that through Step 101, it can be known that temperature has a greater impact on the pelletizing effect. Adjusting the barrel, die, and pelletizing water temperatures greatly affects the product effect. The relevant temperature settings can be adjusted simultaneously. However, to obtain the optimal parameter settings, this application adopts the method of adjusting one set of data of the barrel, die, and pelletizing water temperatures and fixing the remaining temperature parameters to gradually try, so as to obtain the optimal value.

[0045] Among them:

[0046] 1. Barrel temperature control: The barrel temperature is directly controlled by an electric heater. Its temperature value is detected by an instrument probe and transmitted to the temperature controller. The temperature controller adjusts the current of the electric heater according to the deviation from the set value. At the same time, the barrel has an independent cooling water system. The control valve for cooling water to enter the barrel is controlled by setting the length of the water inlet time and the water inlet frequency in the control room. Under the condition of a certain electric heater temperature, the temperature of the barrel is controlled by adjusting the amount of cooling water entering the barrel and the interval of controlling the cooling water inlet.

[0047] Table 1 Influence of different barrel temperatures on pelletizing effect

[0048]

[0049] 2. Template Temperature Control: The template temperature is controlled by an independent heat transfer oil system. The heat transfer oil is heated in an electric heater and then pumped into the template to raise the temperature. The flow rate of the heat transfer oil is reflected by the pressure difference at the inlet of the electric heater, and the optimal pressure difference is controlled between 0.02 - 0.03 MPa. The temperature of the heat transfer oil is manually adjusted according to the change in the template temperature by setting the temperature value of the heat transfer oil, and then the current of the heat transfer oil electric heater is controlled to achieve temperature rise and fall.

[0050] Table 2 Influence of Different Template Temperatures on Pelletizing Effect

[0051]

[0052] 3. Pelletizing Water Temperature Control: The pelletizing water temperature is compared by detecting the temperature at the outlet of the pelletizing water heat exchanger with the set temperature of the pelletizing water. The deviation value is transmitted to the cooling water control valve of the heat exchanger through an instrument signal, and the opening degree of the control valve is adjusted to control the amount of cooling water entering, thereby controlling the temperature of the pelletizing water.

[0053] Table 3 Influence of Different Pelletizing Water Temperatures on Pelletizing Effect

[0054]

[0055] Step 103: Use several sets of control parameter sets as the control parameters for the polypropylene production process, and conduct corresponding several sets of polypropylene production experiments respectively to obtain several sets of experimental data including the generation amounts of debris and trailing pellets. Among them, the cutting tool materials used for pelletizing in each group of experiments are the same.

[0056] It should be noted that the control method of this application is source control. After trying various cutting tool materials, the appropriate cutting tool material is selected, and the relevant parameters of the barrel temperature, template temperature, and pelletizing water temperature are optimized and adjusted to explore the optimal control parameters, effectively reducing the generation amount of trailing pellets.

[0057] It can be understood that with a cutting tool of the same material, fixing the template temperature and pelletizing water temperature, optimizing and adjusting the barrel temperature, observing the pellets in the sampling port of the pelletizer, whether there are trailing pellets in the sample per unit weight, and determining the quantity; fixing the barrel temperature and pelletizing water temperature, optimizing and adjusting the template temperature, observing the pellets in the sampling port of the pelletizer, whether there are trailing pellets in the sample per unit weight, and determining the quantity. Finally, fixing the barrel temperature and template temperature, optimizing and adjusting the pelletizing water temperature, observing the pellets in the sampling port of the pelletizer, whether there are trailing pellets in the sample per unit weight, and determining the quantity. Through the above methods, gradually optimize and try, compare and observe in turn until the number of trailing pellets reaches the optimal situation, and then obtain the optimal control parameters of the barrel temperature, template temperature, and pelletizing water temperature.

[0058] The following are specific experimental examples given in this application:

[0059] Example 1:

[0060] 1) Extruder load: 12 t / h.

[0061] 2) Barrel temperature: 220 - 230 °C, die temperature: 194 - 198 °C, pelletizing water temperature: 57 - 59 °C,

[0062] Example 2:

[0063] 1) Extruder load: 12 t / h.

[0064] 2) Barrel temperature: 235 - 245 °C, die temperature: 194 - 198 °C, pelletizing water temperature: 57 - 59 °C,

[0065] Example 3:

[0066] 1) Extruder load: 12 t / h.

[0067] 2) Barrel temperature: 240 - 250 °C, die temperature: 194 - 198 °C, pelletizing water temperature: 57 - 59 °C,

[0068] Example 4:

[0069] 1) Extruder load: 12 t / h.

[0070] 2) Barrel temperature: 240 - 250 °C, die temperature: 198 - 203 °C, pelletizing water temperature: 59 - 61 °C

[0071] Example 5:

[0072] 1) Extruder load: 12 t / h.

[0073] 2) Barrel temperature: 240 - 250 °C, die temperature: 208 - 213 °C, pelletizing water temperature: 64 - 66 °C,

[0074] Example 6:

[0075] 1) Extruder load: 12 t / h.

[0076] 2) Barrel temperature: 240 - 250 °C, die temperature: 218 - 223 °C, pelletizing water temperature: 64 - 66 °C,

[0077] Example 7:

[0078] 1) Extruder load: 12 t / h.

[0079] 2) Barrel temperature: 240 - 250 °C, die temperature: 218 - 223 °C, pelletizing water temperature: 69 - 71 °C,

[0080] Example 8:

[0081] 1) Extruder load: 12t / h.

[0082] 2) Cylinder temperature: 240-250℃, template temperature: 228-232℃, pelletizing water temperature: 64-66℃ After temperature optimization and adjustment, the corresponding results of tailing particles are shown in Table 1.

[0083] Step 104: compare the experimental data of each group, determine the optimal control parameter set, and use the optimal control parameter set to control the polypropylene production process.

[0084] It should be noted that the experimental data of step 103 are summarized as shown in Table 4.

[0085] Table 4 Corresponding effects of tailing particles at different temperatures

[0086]

[0087] In each experimental example in Table 4, the optimal tailing pellets are achieved by optimizing the barrel temperature, the template temperature, and the pelletizing water temperature while other process control parameters remain unchanged, without considering the influence of other factors on the tailing pellets.

[0088] From the comparison results of the experimental examples in Table 4, considering all factors, the experimental example 6 has the best effect, achieving the optimal situation of tailing particles, and obtaining the optimal control parameters of the barrel temperature, template temperature, and pelletizing water temperature.

[0089] In one embodiment, in the control method of the present application, in the production of polypropylene, the cutter material selected is: Fe-TiC metal ceramic composite pelletizer.

[0090] It should be noted that during the cutter selection and trial, the NiCr-TiC metal ceramic composite pelletizer that came with the extruder was first used. However, during the use process, it was found that although the cutter of this material has a long service life, it takes a long time to run in. When producing homopolymers, the pelletizing effect is poor, and there are many materials falling off and debris. After communicating with the cutter manufacturer, the Fe-TiC metal ceramic composite pelletizer was selected. Under the same conditions, the running-in time is short and the pelletizing effect is significantly improved.

[0091] Table 5 Effect of different cutting knives on pelletizing effect

[0092]

[0093] In one embodiment, the control method of the present application further includes: in the production of polypropylene, a suction system is added to adsorb and remove debris in the silo.

[0094] Furthermore, according to the number of trailing pellets per unit weight, different pressure operation modes for starting or stopping the suction system are set to adsorb and remove debris in the silo.

[0095] It should be noted that specific pressure values are set for starting and stopping the suction system, and the system will automatically stop after reaching this value. Different pressure operation modes are set according to the number of trailing pellets per unit weight. The detailed data settings are shown in Table 6 below:

[0096] Table 6 Corresponding Table of Trailing Pellets and Suction Pressure Settings

[0097]

[0098] In one embodiment, the control method of the present application further includes: during the production of polypropylene, an additive pipeline oscillator is added to knock on the additive pipeline during the additive addition process.

[0099] It should be noted that by adding an additive pipeline oscillator in the present application, nitrogen is used as the power to continuously knock on the pipeline to prevent the additive from bridging and blocking in the pipeline, resulting in fluctuations in the additive flow rate.

[0100] In one embodiment, the control method of the present application further includes: during the production of polypropylene, monitoring the operating parameters of the production system and giving a reminder through setting data deviation alarms.

[0101] It should be noted that in the present application, various data of the entire extruder system, such as temperature, pressure, vibration, power, product melt index, etc., are transmitted to the control room controller through instrument remote signals for real-time monitoring, and reminders are given through setting data deviation alarms. The load of the extruder is controlled by adjusting the powder flow rate entering the extruder. During the operation of the extruder, attention should be paid to the operation of the additive system, and real-time monitoring should be carried out on the changes in the barrel temperature, die temperature, and product melt index. The load of the extruder, the speed, temperature, and powder melt index of the pelletizer are adjusted in a timely manner to stabilize the operating parameters; the number of product trailing pellets is regularly checked by the operator and reported and adjusted in a timely manner.

[0102] The following is an explanation of a polypropylene production step provided by an embodiment of the present application:

[0103] 1. After the polymerized powder is metered by a weighing scale, it enters the powder mixer together with an additive at a certain flow rate for mixing.

[0104] 2. The mixed powder in step 1 enters the extruder barrel through the powder hopper. The material is melted and kneaded in the barrel whose temperature is controlled by electric heating. After the melted material is pressurized by a gear pump and filtered by a screen changer, it enters the die head. The gear pump, screen changer, and die head have independent heat transfer oil systems to control the temperature.

[0105] 3. After the materials in Step 2 reach the die head and are extruded from the template in a bundle shape, they are cut into particles by a coaxial rotating combination of cutters in the water chamber of the pelletizer. The particles are carried out by the pelletizing water system, and the temperature of the pelletizing water is regulated by an independent cooling control system.

[0106] 4. The particles in Step 3 enter the dryer for drying. After drying, the particles enter the vibrating screen to separate out qualified particles, and the qualified particles enter the pellet bin through the pellet conveying system.

[0107] 5. Stir and blend the pellets in the bin in Step 4, and start the suction system to further remove the debris in the pellets. Optionally, after the blending and stirring stop for a certain period of time, the automatic suction system is started (the suction parameters can be preset, and different programs of suction parameters can be set according to the amount of residual debris in the pellets before suction), and the debris in the pellets is further suctioned and removed.

[0108] A control method for generating debris and trailing pellets provided by an embodiment of the present application. By using cutters of the same material, fixing the template temperature and the pelletizing water temperature, optimizing and adjusting the barrel temperature, observing the pellets in the sampling port of the granulator, whether there are trailing pellets in the sample per unit weight, and determining the quantity; and fixing the barrel temperature and the pelletizing water temperature, optimizing and adjusting the template temperature, observing the pellets in the sampling port of the granulator, whether there are trailing pellets in the sample per unit weight, and determining the quantity. And fixing the barrel temperature and the template temperature, optimizing and adjusting the pelletizing water temperature, observing the pellets in the sampling port of the granulator, whether there are trailing pellets in the sample per unit weight, and determining the quantity. Through the above methods, gradually optimize and try, compare and observe in turn until the number of trailing pellets reaches the optimal situation, and then obtain the best control parameters of the barrel temperature, the template temperature, and the pelletizing water temperature. Thus, the generation amount of trailing pellets and debris in the polypropylene production process is reduced.

[0109] The above is a control method for generating debris and trailing pellets provided by an embodiment of the present application. The following is a control system for generating debris and trailing pellets provided by an embodiment of the present application.

[0110] Please refer to Figure 2 , a control system for generating debris and trailing pellets provided by an embodiment of the present application, includes:

[0111] An analysis unit 201, configured to obtain several main influencing parameters that cause the generation of debris and trailing pellets in the polypropylene production process through analysis.

[0112] A generation unit 202, configured to take any one of the several main influencing parameters as a control variable, and the remaining main influencing parameters as invariant quantities, and generate several sets of control parameter sets.

[0113] A control unit 203 is configured to use several sets of control parameter sets as the control parameters for the polypropylene production process, and respectively conduct corresponding several sets of polypropylene generation experiments to obtain several sets of experimental data including the generation amounts of debris and trailing particles. Among them, the cutter materials used for pelletizing in each group of experiments are the same.

[0114] A comparison unit 204 is configured to compare the experimental data of each group, determine the optimal control parameter set, and use the optimal control parameter set to control the polypropylene production process.

[0115] Furthermore, in the embodiments of the present application, a control device for reducing the generation of debris and trailing particles is further provided. The device includes a processor and a memory:

[0116] The memory is configured to store program codes and transmit the program codes to the processor;

[0117] The processor is configured to execute the steps of the control method for reducing the generation of debris and trailing particles as described in the foregoing method embodiments according to the instructions in the program codes.

[0118] Furthermore, in the embodiments of the present application, a computer-readable storage medium is further provided. The computer-readable storage medium is configured to store program codes, and the program codes are used to execute the control method for reducing the generation of debris and trailing particles as described in the foregoing method embodiments.

[0119] Those skilled in the art can clearly understand that for the convenience and conciseness of description, the specific working processes of the systems and units described above can refer to the corresponding processes in the foregoing method embodiments, and will not be elaborated herein.

[0120] The terms "first", "second", "third", "fourth", etc. (if any) in the specification of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units does not necessarily need to be limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or are inherent to these processes, methods, products, or devices.

[0121] It should be understood that in this application, "at least one (item)" means one or more, and "a plurality" means two or more. "And / or" is used to describe the association relationship of associated objects, indicating that there can be three relationships. For example, "A and / or B" can mean: only A exists, only B exists, and both A and B exist at the same time. Among them, A and B can be singular or plural. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. "At least one (or more) of the following" or its similar expressions refer to any combination of these items, including any combination of single items (or more) or plural items (or more). For example, at least one (or more) of a, b, or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a, b, and c", where a, b, and c can be single or multiple.

[0122] In several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division. In actual implementation, there can be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling or direct coupling or communication connection to each other can be through some interfaces, and the indirect coupling or communication connection of the devices or units can be in electrical, mechanical, or other forms.

[0123] The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0124] In addition, each functional unit in various embodiments of this application can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above integrated units can be implemented in the form of hardware or in the form of software functional units.

[0125] When the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The foregoing storage medium includes: various media that can store program codes, such as USB flash drives, mobile hard disks, read-only memories (English full name: Read-Only Memory, English abbreviation: ROM), random access memories (English full name: Random Access Memory, English abbreviation: RAM), magnetic disks, or optical discs.

[0126] As described above, the above embodiments are only used to illustrate the technical solutions of this application, rather than to limit them; although this application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of this application.

Claims

1. A control method for reducing the generation of debris and trailing particles, characterized in that, Comprising: Obtaining, through analysis, several main influencing parameters that cause the generation of debris and trailing pellets during the polypropylene production process; Taking any one of the several main influencing parameters as a control variable, and the remaining main influencing parameters as invariant quantities, to generate several sets of control parameter sets; Using the several sets of control parameter sets as the control parameters for the polypropylene production process, and respectively conducting several corresponding polypropylene generation experiments to obtain several sets of experimental data including the generation amounts of debris and trailing pellets, wherein the cutter materials used for pelletizing in each group of experiments are the same; Comparing the experimental data of each group to determine the optimal control parameter set, and using the optimal control parameter set to control the polypropylene production process.

2. The control method for reducing the generation of debris and trailing particles according to claim 1, characterized in that, The several main influencing parameters include: barrel temperature, die temperature, and pelletizing water temperature.

3. The control method for reducing the generation of debris and trailing particles according to claim 1, wherein Also comprising: During the polypropylene production process, arranging a suction system to adsorb and remove the debris in the silo.

4. The control method for reducing the generation of debris and trailing particles according to claim 1, characterized in that, Also comprising: During the polypropylene production process, arranging an additive pipeline oscillator for knocking on the additive pipeline during the additive addition process.

5. The control method for reducing the generation of debris and trailing particles according to claim 1, characterized in that, Also comprising: During the polypropylene generation, monitoring the operating parameters of the production system and giving a reminder by setting data deviation alarms.

6. The control method for reducing the generation of debris and trailing particles according to claim 3, characterized in that, The adsorbing and removing the debris in the silo by arranging a suction system includes: According to the number of trailing pellets per unit weight, setting different pressure operation modes for the suction system to start or stop, and adsorbing and removing the debris in the silo.

7. The control method for reducing debris and trailing particle generation according to any one of claims 1 to 6, characterized in that, The cutter material is: Fe-TiC cermet composite pelletizing cutter.

8. A control system for reducing the generation of debris and trailing particles, characterized in that, Comprising: An analysis unit for obtaining, through analysis, several main influencing parameters that cause the generation of debris and trailing pellets during the polypropylene production process; A generating unit for taking any one of the several main influencing parameters as a control variable, and the remaining main influencing parameters as invariant quantities, to generate several sets of control parameter sets; A control unit for using the several sets of control parameter sets as the control parameters for the polypropylene production process, and respectively conducting several corresponding polypropylene generation experiments to obtain several sets of experimental data including the generation amounts of debris and trailing pellets, wherein the cutter materials used for pelletizing in each group of experiments are the same; A comparison unit for comparing the experimental data of each group to determine the optimal control parameter set, and using the optimal control parameter set to control the polypropylene production process.

9. A control device for reducing the generation of debris and trailing particles, characterized in that, The device includes a processor and a memory: The memory is used for storing program codes and transmitting the program codes to the processor; The processor is used for executing the control method for reducing the generation of debris and trailing pellets according to the instructions in the program codes as described in any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium is used for storing program codes, and the program codes are used for executing the control method for reducing the generation of debris and trailing pellets as described in any one of claims 1-7.

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