Dust prevention and control device in polyester chip pre-crystallization treatment process

Abstract

The invention relates to the technical field of polyester chip processing, in particular to a polyester chip pre-crystallization treatment process dust prevention and control device which comprises a bin body, a roller screen assembly used for screening polyester chips in a rolling mode is arranged in the bin body, and a static electricity neutralization assembly used for eliminating static electricity is arranged in the roller screen assembly. According to the dust prevention and control device in the pre-crystallization treatment process of the polyester chips, through the obliquely arranged screen drum, the electrostatic neutralization assembly and the negative pressure assembly, the polyester chips roll in the screen drum in the rotating process of the screen drum and are fully subjected to electrostatic neutralization by the electrostatic neutralization assembly, so that the static electricity is eliminated, and the quality of the polyester chips is improved. The polyester chips can be subjected to electrostatic neutralization without dead angles along with rolling of the screen drum, so that the situation that the neutralization effect is poor due to irregular surfaces of the polyester chips is avoided, the electrostatic neutralization efficiency and quality are improved, and subsequent separation of the polyester chips and dust is facilitated.

Description

Technical Field

[0001] This invention relates to the field of polyester chip processing technology, specifically to a dust control device for the pre-crystallization process of polyester chips. Background Technology

[0002] During the production or feeding process of polyester chips, the chips collide and rub against each other, generating ultrafine dust. Because polyester chips have strong insulation properties, they are prone to generating static electricity in a dry environment, causing the dust to be attracted to the surface of the polyester chips due to static electricity, which in turn affects the product quality during the pre-crystallization process.

[0003] In existing technologies, ion bars or ion fans are typically used to blow charged ions toward the product to neutralize the charge and thus eliminate static electricity. However, in the ultrafine dust separation process of polyester chips, the polyester chips are granular with irregular surfaces. If neutralization is incomplete, ultrafine dust can easily remain on the polyester chips, affecting the separation effect. Furthermore, the ultrafine dust separation process of polyester chips usually involves multiple batches of dust removal, making the separation process inconsistent and affecting the efficiency of dust removal. Therefore, we propose a dust control device for the pre-crystallization process of polyester chips. Summary of the Invention

[0004] The purpose of this invention is to provide a dust control device for the pre-crystallization process of polyester chips, so as to solve the problems mentioned in the background art, such as dust residue caused by irregular surface of polyester chips, poor separation effect, and poor efficiency caused by batch processing. To achieve the above objectives, the present invention provides the following technical solution: a dust control device for the pre-crystallization process of polyester chips, comprising a silo body, an internal sieve assembly for sieving polyester chips, an internal static neutralization assembly for eliminating static electricity, the sieve assembly comprising a sieve cylinder of sufficient length, a drive unit for driving the sieve cylinder to rotate, and a support unit for supporting the sieve cylinder, a top cover fixedly connected to the top of the silo body, a feed pipe for conveying polyester chip raw materials fixedly connected to one side of the silo body, and one end of the feed pipe extending into the inside of the sieve cylinder, a discharge guide plate for discharging polyester chips fixedly connected to the side of the silo body away from the feed pipe, two first support legs fixedly connected to the bottom side of the silo body near the feed pipe, two second support legs fixedly connected to the bottom side of the silo body near the discharge guide plate, and the first support legs being higher than the second support legs, and a negative pressure assembly for dust removal provided at the bottom of one side of the silo body.

[0005] More preferably, the drive unit includes a first drive motor fixedly connected to the bottom of the inner cavity of the chamber, a synchronous pulley fixedly connected to the output shaft end of the first drive motor, side frames fixedly connected to both ends of the screen cylinder, an annular groove being formed on the outer wall of the side frame near the feed pipe, and a synchronous belt being connected to the annular groove and the synchronous pulley for transmission.

[0006] More preferably, the support includes two brackets fixedly connected to the bottom of the inner cavity of the silo, and the brackets are U-shaped. Two hanging rods are fixedly connected to the top of the inner cavity of the top cover. The two ends of the brackets and the bottom of the hanging rods are rotatably connected to a central shaft through bearings. An auxiliary roller is fixedly sleeved on the outer wall of the central shaft, and the outer wall of the auxiliary roller is in contact with the outer wall of the screen cylinder.

[0007] More preferably, the static electricity neutralization component comprises a plurality of charge neutralization units for eliminating static electricity, an airflow delivery section for delivering clean air, and an oscillating section for driving the plurality of charge neutralization units to oscillate back and forth.

[0008] More preferably, the swinging part includes a motor base fixedly connected to the side of the hopper body near the discharge guide plate, a second drive motor fixedly connected to the side of the motor base away from the hopper body, a connecting piece fixedly connected to the output shaft end of the second drive motor, a stop post rotatably connected to the side of the connecting piece away from the second drive motor, and the stop post and the output shaft end of the second drive motor are eccentrically set, a rotating shaft is rotatably connected to the inner wall of the hopper body near the feed pipe through a bearing, the other end of the rotating shaft movably passes through the hopper body and extends out of the hopper body, a swing rod is fixedly connected to the end of the rotating shaft extending out of the hopper body, the swing rod has a movable groove inside, the stop post is inserted into the movable groove, and the outer wall of the stop post is slidably connected to the inner wall of the movable groove.

[0009] More preferably, the charge neutralization unit includes multiple air knives fixedly sleeved on a rotating shaft. The air knives have cavities inside for airflow. A flat groove is fixedly connected to one side of the bottom of the air knives, and an ion rod is fixedly connected to the other side of the bottom of the air knives, with the ionization end of the ion rod facing downwards. A communication interface is fixedly connected to one side of the air knives.

[0010] More preferably, the airflow conveying unit includes an air inlet pipe fixedly connected to the side of the hopper body near the feed pipe, and one end of the air inlet pipe extends to the inner wall of the hopper body away from the feed pipe. Multiple diversion interfaces are fixedly connected to the outer wall of the air inlet pipe, and each diversion interface corresponds to a connecting interface. Each corresponding diversion interface and connecting interface are connected by a flexible hose.

[0011] More preferably, the negative pressure component includes an air outlet sleeve fixedly connected to the bottom of one side of the chamber, and an air outlet pipe fixedly connected to the side of the air outlet sleeve away from the chamber.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: In this invention, the inclined sieve cylinder, electrostatic neutralization component, and negative pressure component ensure that the dust adsorbed by electrostatics on the polyester chips is fully neutralized by the electrostatic neutralization component during the rotation of the sieve cylinder, thereby eliminating static electricity. As the sieve cylinder rotates, the polyester chips are electrostatically neutralized without any blind spots, thus avoiding poor neutralization effect caused by irregular surface of the polyester chips, improving the efficiency and quality of electrostatic neutralization, and facilitating the subsequent separation of polyester chips from dust.

[0013] In this invention, after eliminating static electricity on the polyester chips and dust, the dust that falls off the polyester chips is adsorbed and separated by a negative pressure component, thereby removing the ultrafine dust from the polyester chips. The separation process can be continuously fed, continuously separated and continuously discharged, which improves the separation efficiency.

[0014] In this invention, the oscillating part causes the charge neutralization unit and the airflow conveying part to form an ion curtain covering a fan-shaped area, thereby increasing the range of electrostatic neutralization and further improving the electrostatic neutralization efficiency. Furthermore, the narrow air outlet of the flat-mouthed groove increases the airflow velocity, forming a high-speed airflow that blows away dust from the surface of the polyester chips. The dust is then extracted by the negative pressure component. The high-speed airflow can further improve the separation effect between the polyester chips and the dust. At the same time, the high-speed airflow can have a good cleaning effect on polyester chips with irregular surfaces. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the cross-sectional structure of the present invention. Figure 1 ; Figure 4 For the present invention Figure 3 Enlarged structural diagram at point A; Figure 5 This is a schematic diagram of the cross-sectional structure of the present invention. Figure 2 ; Figure 6 For the present invention Figure 5 Enlarged structural diagram at point B; Figure 7 For the present invention Figure 5 Enlarged structural diagram at point C; Figure 8 This is a schematic diagram of the cross-sectional structure of the present invention. Figure 3 .

[0016] In the diagram: 1. Bin body; 2. Central shaft; 3. Screen cylinder; 4. Motor base; 5. Rotating shaft; 6. Air inlet pipe; 11. Top cover; 12. Feed pipe; 13. First support leg; 14. Second support leg; 15. Discharge guide plate; 21. Bracket; 22. Auxiliary roller; 23. Hanging rod; 31. Side frame; 32. Synchronous belt; 33. First drive motor 33; 34, synchronous pulley 34; 41, second drive motor 41; 42, connecting piece 42; 43, abutment 43; 44, swing arm 44; 45, movable groove 45; 51, air knife 51; 52, flat-mouth groove 52; 53, cavity 53; 54, ion rod 54; 55, connecting interface 55; 61, diversion interface 61; 62, air outlet sleeve 62; 63, air outlet pipe 63. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figures 1-8 The present invention provides a technical solution: a dust control device for the pre-crystallization process of polyester chips, comprising a silo body 1, wherein a rotary screen assembly for rotating and screening polyester chips is provided inside the silo body 1, and an electrostatic neutralization component for eliminating static electricity is provided inside the rotary screen assembly. The rotary screen assembly comprises a screen cylinder 3, a drive unit for driving the screen cylinder 3 to rotate, and a support unit for supporting the screen cylinder 3. A top cover 11 is fixedly connected to the top of the silo body 1, and a feed pipe 12 for conveying polyester chip raw materials is fixedly connected to one side of the silo body 1, with one end of the feed pipe 12 extending into the screen cylinder 3. A discharge guide plate 15 for discharging polyester chips is fixedly connected to the side of the silo body 1 away from the feed pipe 12. Two first support legs 13 are fixedly connected to the bottom side of the silo body 1 near the feed pipe 12, and two second support legs 14 are fixedly connected to the bottom side of the silo body 1 near the discharge guide plate 15, with the first support legs 13 being higher than the second support legs 14. A negative pressure component for dust removal is provided at the bottom of one side of the silo body 1. Because the first support leg 13 is higher than the second support leg 14, the screen cylinder 3 inside the silo 1 is tilted. When the polyester chips rotate and tumble with the screen cylinder 3 of sufficient length, the polyester chips gradually roll from the feed pipe 12 toward the discharge guide plate 15. Then, the static electricity on the polyester chips is neutralized by the electrostatic neutralization component, so that the dust on the polyester chips is no longer adsorbed on the polyester chips due to static electricity. Finally, the dust is discharged by the negative pressure component through negative pressure adsorption.

[0019] In this embodiment, as Figure 3 , Figure 5 and Figure 8 As shown, the drive unit includes a first drive motor 33 fixedly connected to the bottom of the inner cavity of the hopper 1. A synchronous pulley 34 is fixedly connected to the output shaft end of the first drive motor 33. Side frames 31 are fixedly connected to both ends of the screen cylinder 3. An annular groove is provided on the outer wall of the side frame 31 near the feed pipe 12. A synchronous belt 32 is connected to the annular groove and the synchronous pulley 34 for transmission. The screen cylinder 3 is driven to rotate continuously by the first drive motor 33, the synchronous pulley 34 and the synchronous belt 32.

[0020] In this embodiment, as Figure 2 , Figure 5 and Figure 8 As shown, the support includes two brackets 21 fixedly connected to the bottom of the inner cavity of the silo 1, and the brackets 21 are U-shaped. Two hanging rods 23 are fixedly connected to the top of the inner cavity of the top cover 11. The two ends of the brackets 21 and the bottom of the hanging rods 23 are rotatably connected to the central shaft 2 through bearings. An auxiliary roller 22 is fixedly sleeved on the outer wall of the central shaft 2, and the outer wall of the auxiliary roller 22 is in contact with the outer wall of the screen cylinder 3. There are three central shafts 2. Each central shaft 2 is fixedly fitted with multiple auxiliary rollers 22 that rotate the auxiliary screen cylinder 3 and provide support and stability to the screen cylinder 3. The central shaft 2 located at the top of the screen cylinder 3 passes through the bottom of two hanging rods 23 in sequence and is rotatably connected to the hanging rods 23. The other two central shafts 2 pass through two brackets 21, and the two central shafts 2 respectively move through the two ends of the brackets 21.

[0021] In this embodiment, as Figure 3 , Figure 5 and Figure 8 As shown, the static electricity neutralization assembly comprises multiple charge neutralization units for eliminating static electricity, an airflow conveying section for conveying clean air, and an oscillating section for driving the multiple charge neutralization units to oscillate back and forth. Multiple charge neutralization units are driven to oscillate back and forth by the swinging part, so that the airflow conveying part carries the clean air and the ions released by the charge neutralization units to neutralize the electrostatics of the polyester chips that are continuously tumbling in the sieve cylinder 3. This uniformly and quickly eliminates the static electricity on the polyester chips and dust, thereby preventing the dust from continuing to be adsorbed on the surface of the polyester chips due to static electricity, and facilitating the separation of dust from the polyester chips.

[0022] In this embodiment, as Figure 3 , Figure 4 and Figure 8As shown, the swinging part includes a motor base 4 fixedly connected to the side of the hopper 1 near the discharge guide plate 15. A second drive motor 41 is fixedly connected to the side of the motor base 4 away from the hopper 1. A connecting piece 42 is fixedly connected to the output shaft end of the second drive motor 41. A stop post 43 is rotatably connected to the side of the connecting piece 42 away from the second drive motor 41. The stop post 43 and the output shaft end of the second drive motor 41 are eccentrically set. A rotating shaft 5 is rotatably connected to the inner wall of the hopper 1 near the feed pipe 12 via a bearing. The other end of the rotating shaft 5 movably passes through the hopper 1 and extends out of the hopper 1. A swing rod 44 is fixedly connected to the end of the rotating shaft 5 extending out of the hopper 1. A movable groove 45 is opened inside the swing rod 44. The stop post 43 is inserted into the movable groove 45, and the outer wall of the stop post 43 is slidably connected to the inner wall of the movable groove 45. The output shaft of the second drive motor 41 rotates to drive the connecting piece 42 and the abutment 43 to rotate. Since the abutment 43 and the output shaft of the second drive motor 41 are not on the same axis, the rocker arm 44 will swing back and forth within a certain angle range as the abutment 43 rotates with the connecting piece 42, thereby causing the rotating shaft 5 to rotate back and forth.

[0023] In this embodiment, as Figure 5 and Figure 6 As shown, the charge neutralization unit includes multiple air knives 51 fixedly sleeved on the rotating shaft 5. The air knives 51 have a cavity 53 for airflow to pass through inside. A flat groove 52 is fixedly connected to one side of the bottom of the air knives 51. An ion rod 54 is fixedly connected to the other side of the bottom of the air knives 51, and the ionization end of the ion rod 54 faces downward. A communication interface 55 is fixedly connected to one side of the air knives 51. The connecting interface 55 is connected to the flat-mouthed groove 52 through the cavity 53. The ionization end of the ion rod 54 ionizes the air to form charged ions. The flat-mouthed groove 52 forms an airflow curtain through the flat opening at the bottom, and blows the ions in the air into the polyester chips. The reciprocating swing of the rotating shaft 5 causes the air knife 51 and the ion rod 54 fixed to the bottom of the air knife 51 to swing back and forth synchronously, thereby increasing the coverage of the ion curtain and ensuring that the polyester chips and the powder on their surface are fully neutralized by the charged ions.

[0024] In this embodiment, as Figure 2 , Figure 5 and Figure 6 As shown, the air conveying unit includes an air inlet pipe 6 fixedly connected to the side of the chamber 1 near the feed pipe 12, and one end of the air inlet pipe 6 extends to the inner wall of the chamber 1 away from the feed pipe 12. Multiple diversion ports 61 are fixedly connected to the outer wall of the air inlet pipe 6, and each diversion port 61 corresponds to a connecting port 55. Each corresponding diversion port 61 and connecting port 55 are connected by a flexible hose. One end of the air inlet duct 6 located outside the chamber 1 is connected to the air filter and the air pump in sequence through the pipeline. The air filter filters the air supplied by the air pump and delivers it to the air inlet duct 6. The air then enters the cavity 53 through multiple diversion ports 61 and finally exits through the opening at the bottom of the flat slot 52.

[0025] In this embodiment, as Figure 1 and Figure 6 As shown, the negative pressure component includes an air outlet sleeve 62 fixedly connected to the bottom of one side of the chamber 1, and an air outlet pipe 63 fixedly connected to the side of the air outlet sleeve 62 away from the chamber 1. The end of the air outlet duct 63 is connected to a negative pressure fan and a dust collection bag in sequence through a pipeline. It is used to transport the dust on the polyester chips into the dust collection bag through negative pressure and collect the dust.

[0026] The method of use and advantages of the present invention: The dust control device for the pre-crystallization process of polyester chips operates as follows: When in use, first start the first drive motor 33, the second drive motor 41, the ion bar, the air pump and the negative pressure fan. Then, manually feed the polyester chips into the feed pipe 12 through the material conveying mechanism. Then, the polyester chips enter the screen cylinder 3 through the feed pipe 12. When the polyester chips enter the screen cylinder 3, the drive unit drives the screen cylinder 3 to rotate, causing the polyester chips to tumble inside the screen cylinder 3. Since the screen cylinder 3 is inclined, the screen cylinder 3 causes the polyester chips to tumble upwards to a certain height and then slide downwards. At the same time, the polyester chips gradually tumble towards the discharge guide plate 15. While the polyester chips are tumbling, the airflow in the air knife 51 is discharged through the bottom of the flat groove 52. The airflow carries the air ionized by the ion rod 54 and blows it towards the polyester chips in the form of an air curtain. The air curtain blows the charged ions towards the polyester chips. Under the action of the charged ions, the dust on the polyester chips and their surface will neutralize the static electricity, so that the dust will no longer adhere to the polyester chips due to static electricity. Thus, the polyester chips are separated from the dust. Under the blowing of the air curtain and the negative pressure in the chamber 1, the dust passes through the screen holes of the screen cylinder 3 and is discharged through the air outlet sleeve 62 and the air outlet pipe 63, thus completely separating the polyester chips from the dust. Meanwhile, the output shaft of the second drive motor 41 drives the abutment 43 to rotate through the connecting piece 42. The outer wall of the abutment 43 pushes against the inner wall of the movable groove 45, causing the swing arm 44 to swing back and forth around the rotating shaft 5. At the same time, the swing arm 44 drives the rotating shaft 5 to swing back and forth, and the rotating shaft 5 drives the multiple air knives 51 on it to swing back and forth. This allows the air curtain formed at the bottom of the air knives 51 to blow back and forth in the fan-shaped area towards the polyester chips in the screen cylinder 3. Combined with the tumbling of the polyester chips, the ions in the air curtain can quickly and fully neutralize the charge carried on the polyester chips and dust, improving the efficiency of electrostatic neutralization and thus improving the efficiency of dust removal from the polyester chips.

Claims

1. A dust control device for the pre-crystallization process of polyester chips, characterized in that, The container includes a silo body (1), inside which is a rotary screen assembly for sieving polyester chips. Inside the rotary screen assembly is a static neutralization assembly for eliminating static electricity. The rotary screen assembly consists of a screen cylinder (3) of sufficient length, a drive unit for driving the screen cylinder (3) to rotate, and a support unit for supporting the screen cylinder (3). A top cover (11) is fixedly connected to the top of the silo body (1), and a feed pipe (12) for conveying polyester chip raw materials is fixedly connected to one side of the silo body (1). The end extends into the screen cylinder (3). The side of the silo (1) away from the feed pipe (12) is fixedly connected to a discharge guide plate (15) for discharging polyester chips. Two first support legs (13) are fixedly connected to the bottom side of the silo (1) near the feed pipe (12). Two second support legs (14) are fixedly connected to the bottom side of the silo (1) near the discharge guide plate (15), and the first support legs (13) are higher than the second support legs (14). A negative pressure component for dust removal is provided at the bottom of one side of the silo (1).

2. The dust control device for the pre-crystallization process of polyester chips according to claim 1, characterized in that: The drive unit includes a first drive motor (33) fixedly connected to the bottom of the inner cavity of the silo (1). The output shaft end of the first drive motor (33) is fixedly connected to a synchronous pulley (34). The two ends of the screen cylinder (3) are fixedly connected to side frames (31). An annular groove is provided on the outer wall of the side frame (31) near the feed pipe (12). The annular groove and the synchronous pulley (34) are connected together by a synchronous belt (32).

3. The dust control device for the pre-crystallization process of polyester chips according to claim 2, characterized in that: The support includes two brackets (21) fixedly connected to the bottom of the inner cavity of the silo (1), and the brackets (21) are U-shaped. Two hanging rods (23) are fixedly connected to the top of the inner cavity of the top cover (11). The two ends of the brackets (21) and the bottom of the hanging rods (23) are rotatably connected to the central shaft (2) through bearings. An auxiliary roller (22) is fixedly sleeved on the outer wall of the central shaft (2), and the outer wall of the auxiliary roller (22) is in contact with the outer wall of the screen cylinder (3).

4. The dust control device for the pre-crystallization process of polyester chips according to claim 3, characterized in that: The static electricity neutralization assembly comprises multiple charge neutralization units for eliminating static electricity, an airflow delivery unit for delivering clean air, and an oscillating unit for driving the multiple charge neutralization units to oscillate back and forth.

5. A dust control device for the pre-crystallization process of polyester chips according to claim 4, characterized in that: The swinging part includes a motor base (4) fixedly connected to the side of the hopper (1) near the discharge guide plate (15). A second drive motor (41) is fixedly connected to the side of the motor base (4) away from the hopper (1). A connecting piece (42) is fixedly connected to the output shaft end of the second drive motor (41). A stop post (43) is rotatably connected to the side of the connecting piece (42) away from the second drive motor (41). The stop post (43) is offset from the output shaft end of the second drive motor (41). In the central configuration, a rotating shaft (5) is rotatably connected to the inner wall of the hopper (1) near the feed pipe (12) via a bearing. The other end of the rotating shaft (5) movably passes through the hopper (1) and extends out of the hopper (1). A swing rod (44) is fixedly connected to one end of the rotating shaft (5) extending out of the hopper (1). A movable groove (45) is opened inside the swing rod (44). The abutment (43) is inserted into the movable groove (45), and the outer wall of the abutment (43) is slidably connected to the inner wall of the movable groove (45).

6. The dust control device for the pre-crystallization process of polyester chips according to claim 5, characterized in that: The charge neutralization unit includes multiple air knives (51) fixedly sleeved on the rotating shaft (5). The air knives (51) have cavities (53) for airflow to pass through inside. A flat groove (52) is fixedly connected to one side of the bottom of the air knives (51). An ion rod (54) is fixedly connected to the other side of the bottom of the air knives (51), and the ionization end of the ion rod (54) faces downward. A communication interface (55) is fixedly connected to one side of the air knives (51).

7. A dust control device for the pre-crystallization process of polyester chips according to claim 6, characterized in that: The airflow conveying unit includes an air inlet pipe (6) fixedly connected to the side of the chamber (1) near the feed pipe (12), and one end of the air inlet pipe (6) extends to the inner wall of the chamber (1) away from the feed pipe (12). Multiple diversion ports (61) are fixedly connected to the outer wall of the air inlet pipe (6), and each diversion port (61) corresponds to a connecting port (55). Each corresponding diversion port (61) and connecting port (55) are connected by a flexible hose.

8. A dust control device for the pre-crystallization process of polyester chips according to claim 7, characterized in that: The negative pressure component includes an air outlet sleeve (62) fixedly connected to the bottom of one side of the chamber (1), and an air outlet pipe (63) fixedly connected to the side of the air outlet sleeve (62) away from the chamber (1).

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