Polyethylene master batch screening device

Abstract

The utility model provides a polyethylene master batch screening device, and belongs to the technical field of polyethylene material treatment. According to the polyethylene master batch screening device, the top of a screening chamber is fixedly connected with a feeding hopper, and a leakage opening of the feeding hopper is fixedly communicated with the top end of a spiral dust filtering channel; a plurality of through holes communicated with the interior are formed in the surface of the spiral dust filtering channel; a vertical vibrating screen corresponding to the bottom end of the spiral dust filtering channel is fixedly arranged at the bottom of the screening chamber in an elastic limiting mode. An ion wind generator fixedly connected with the screening chamber is arranged on one side of the spiral dust filtering channel, and a circulating hole is formed in the screening chamber on the opposite side; the screening chamber communicates with the dust removal module through the circulation holes. According to the utility model, efficient screening and dust removal functions are realized. And dust pollution is reduced, the production environment and equipment operation stability are guaranteed, and remarkable environmental protection and economic benefits are achieved. The electric heating wire mesh is matched with the dust removal cloth bag, so that the dust removal working efficiency is improved, and the adsorption treatment effect on polyethylene tiny dust and impurity dust is better.

Description

Technical Field

[0001] This utility model belongs to the field of polyethylene masterbatch screening technology, and specifically relates to a polyethylene masterbatch screening device. Background Technology

[0002] Polyethylene masterbatch is widely used in the production of plastic products, and its quality directly affects the performance of the products. During the production of polyethylene masterbatch, particles of varying sizes are required, necessitating screening technology to remove substandard particles in order to ensure product quality and performance.

[0003] Screening of polyethylene masterbatch is a crucial step in plastic processing. Its core purpose is to reduce defects such as black spots and breakage in finished products caused by impurities or mixed particle sizes through screening. Traditional screening methods often employ vibrating sieves, but these have limitations, such as the tendency for electrostatically adsorbed agglomerates to clog sieve openings, limited screening accuracy, and inadequate handling of plastic dust leading to environmental pollution. With the development of the polyethylene industry, the quality requirements for polyethylene masterbatch are constantly increasing, and traditional screening technologies can no longer meet these demands. There is an urgent need for more efficient and precise screening technologies to ensure raw material quality, processing stability, and reduce plastic dust pollution. Utility Model Content

[0004] The technical problem to be solved by this utility model is to address the shortcomings of existing technologies where polyethylene masterbatch particles and dust easily agglomerate, affecting production quality, and to provide a polyethylene masterbatch screening device.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A polyethylene masterbatch screening device includes a separation module and a dust removal module. The separation module includes a screening chamber, a spiral dust filter channel, a feed hopper, an ionizer, and a vertical vibrating screen. The feed hopper is fixedly connected to the top of the screening chamber, and the outlet of the feed hopper is fixedly connected to the top of the spiral dust filter channel. The surface of the spiral dust filter channel has several through holes communicating with its interior. The bottom of the screening chamber is elastically limited and fixedly equipped with a vertical vibrating screen corresponding to the bottom of the spiral dust filter channel. An ionizer is fixedly connected to the screening chamber on one side of the spiral dust filter channel, and a flow hole is opened on the opposite side of the screening chamber. The screening chamber is connected to the dust removal module through the flow hole.

[0007] Furthermore, limit posts are provided at the four corners of the bottom of the screening chamber, and limit blocks are integrally fixed at the four corners of the bottom of the vertical vibrating screen. The limit blocks are correspondingly and movably sleeved on the limit posts and fixed by bolts. Preload springs are provided between the bottom end of the limit block and the limit post and the bolt fixing end, respectively.

[0008] Furthermore, a support plate is horizontally arranged at the bottom of the vertical vibrating screen, and a first screen and a second screen are arranged obliquely from top to bottom inside the screen; a first discharge port and a second discharge port are fixedly arranged at the inclined bottom edges of the first screen and the second screen, respectively; vibration grooves corresponding to the first discharge port and the second discharge port are respectively opened on the side of the screening chamber; a first distribution channel and a second distribution channel are respectively arranged outside the vibration groove; and a vertical vibration motor is fixedly connected below the support plate.

[0009] Furthermore, the support plates on both sides of the vertical vibration motor are provided with material collection ports; the bottom side of the screening chamber is provided with a top-opening material collection box corresponding to the material collection ports.

[0010] Furthermore, the dust removal module includes a dust removal chamber, a negative pressure fan, a Y-shaped flow channel, dust collector bags, and a dust removal support frame; the dust removal chamber is connected to the screening chamber through the flow hole; the negative pressure fan is fixedly installed in the dust removal chamber at the flow hole; the flow hole is located above the Y-shaped intersection point in the Y-shaped flow channel; a partition plate is fixedly installed at the top of the Y-shaped flow channel to divide the dust removal chamber into two parts; air holes are opened on the partition plate, and a dust removal support frame is fixedly installed above the air holes; the dust collector bags are fitted and fixed on the outside of the dust removal support frame; an exhaust duct connected to the outside is fixedly installed at the top of the dust removal chamber.

[0011] Furthermore, an electrically heated wire mesh is fixedly installed between the two outer sides of the lower part of the Y-shaped flow channel and the dust removal chamber.

[0012] Furthermore, the two sides of the Y-shaped flow channel above the bifurcation each have a balance hole.

[0013] Furthermore, a dust collection box is provided on the bottom side of the dust removal chamber in a movable pull-out manner.

[0014] Preferably, a wetting agent is placed at the bottom of the dust collection box.

[0015] Preferably, the polyethylene masterbatch screening device is effectively grounded.

[0016] Compared with existing technologies, this invention achieves efficient screening and dust removal functions through the synergistic effect of a separation module and a dust removal module. In the separation module, a spiral dust filter channel initially removes dust, an ion air generator eliminates static electricity in the material to prevent screen clogging, and the three-layer structure of the vertical vibrating screen meets the screening requirements for different particle sizes. Its elastic limiting and fixing method ensures screening stability. The dust removal module uses a negative pressure fan to draw in dust-laden gas, which is then filtered through a Y-shaped flow channel and dust collector bags before being discharged as clean gas. The dust collection box collects dust and moistens it to prevent secondary pollution. The overall device effectively improves screening efficiency and quality, reduces dust pollution, and ensures the stability of the production environment and equipment operation, resulting in significant environmental and economic benefits. The electrically heated wire mesh, combined with the dust collector bags, improves dust removal efficiency, provides better adsorption and treatment of polyethylene micro-dust and impurities, reduces the filtration pressure on the dust collector bags, and extends their service life. Attached Figure Description

[0017] The present invention will now be described in further detail with reference to the accompanying drawings.

[0018] Figure 1 : A three-dimensional structural schematic diagram of Embodiment 1 of this utility model;

[0019] Figure 2 : A cross-sectional structural schematic diagram of Embodiment 1 of this utility model;

[0020] Figure 3 : A partially enlarged cross-sectional view of Embodiment 1 of this utility model;

[0021] Figure 4 : A schematic diagram of the cross-sectional structure of the dust removal chamber in Embodiment 2 of this utility model;

[0022] Figure 5 : A three-dimensional cross-sectional view of the dust removal chamber in Embodiment 2 of this utility model;

[0023] Among them, 1-screening chamber, 11-spiral dust filter channel, 111-through hole, 12-feeding funnel, 13-ion wind generator, 14-vertical vibrating screen, 141-first screen, 142-second screen, 143-support plate, 144-vertical vibration motor, 145-first discharge port, 146-second discharge port, 147-collection port, 148-collection box, 149-limiting block, 15-flow hole, 16-limiting column, 17-preload spring, 18-vibration groove, 181-first distribution channel, 182-second distribution channel, 2-dust removal chamber, 21-negative pressure fan, 22-Y-shaped flow channel, 221-balance hole, 23-dust collector bag, 24-dust collector support frame, 25-partition plate, 26-air hole, 27-exhaust duct, 28-dust collection box, 3-electric heating wire mesh. Detailed Implementation

[0024] To better understand this utility model, the following embodiments further illustrate its content, but the scope of protection of this utility model is not limited to the embodiments described below. Numerous specific details are set forth in the following description to provide a more thorough understanding of this utility model. However, it will be apparent to those skilled in the art that this utility model can be practiced without one or more of these details.

[0025] Example 1, see Figure 1-3 A polyethylene masterbatch screening device includes a separation module and a dust removal module. The separation module includes a screening chamber 1, a spiral dust filter channel 11, a feed funnel 12, an ion air generator 13, and a vertical vibrating screen 14. The feed funnel 12 is fixedly connected to the top of the screening chamber 1, and the outlet of the feed funnel 12 is fixedly connected to the top of the spiral dust filter channel 11. The surface of the spiral dust filter channel 11 has several through holes 111 communicating with its interior. The bottom of the screening chamber 1 is elastically limited and fixedly provided with a vertical vibrating screen 14 corresponding to the bottom end of the spiral dust filter channel 11. An ion air generator 13 is fixedly connected to the screening chamber 1 on one side of the spiral dust filter channel 11, and a flow hole 15 is provided on the opposite side of the screening chamber 1. The screening chamber 1 is connected to the dust removal module through the flow hole 15. Both the spiral dust filter channel 11 and the feed funnel 12 are made of stainless steel, which can promptly conduct the static charge generated by the polyethylene masterbatch moving within the spiral dust filter channel 11 to the grounding device, preventing the accumulation of static charge on the channel surface. This reduces the phenomenon of dust and fine particles adhering to the inner wall of the channel due to electrostatic adsorption, making it easier for dust to be discharged through the through holes and improving dust filtration efficiency.

[0026] The feed funnel 12 is fixedly connected to the top of the spiral dust filter channel 11. When the polyethylene material enters the spiral dust filter channel 11 through the feed funnel 12, it moves downward along the spiral path of the channel. The spiral shape design allows the polyethylene masterbatch to move slowly and evenly downward along the spiral path under the action of gravity, prolonging the residence time of the masterbatch in the channel and increasing the opportunity for dust to come into contact with several uniformly sized and densely distributed through holes, thereby improving the dust separation efficiency. During this process, some dust and fine particles are separated through several through holes 111 opened on the surface of the channel, playing a preliminary dust filtering role. The channel is located on one side of the screening chamber 1, generating ion wind that blows obliquely upward toward the spiral dust filter channel 11, neutralizing the static charge generated by the polyethylene masterbatch during the screening process, and further blowing the polyethylene micro dust and its impurities toward the flow hole 15, entering the dust removal module. This can prevent the material from being blocked by electrostatic adsorption on the screen, ensuring smooth screening, improving screening efficiency and screen life.

[0027] Furthermore, limit posts 16 are provided at each of the four corners of the bottom of the screening chamber 1, providing stable limiting support for the vertical vibrating screen 14. Limit blocks 149 are integrally fixed at each of the four corners of the bottom of the vertical vibrating screen 14, and these limit blocks 149 are correspondingly and movably sleeved on the limit posts 16 and bolted for limiting and fixing. Preload springs 17 are provided between the bottom end of the limit block 149 and the bolted end of the limit post 16. This provides appropriate elastic preload force to the vertical vibrating screen 14, allowing it to maintain a certain degree of flexibility during vibration while effectively reducing vibration transmission, lowering equipment noise and vibration, protecting other components from damage, and also contributing to improved screening efficiency and accuracy.

[0028] Furthermore, a support plate 143 is horizontally arranged at the bottom of the vertical vibrating screen 14, and a first screen 141 and a second screen 142 are arranged obliquely from top to bottom inside the screen 14. The aperture of the first screen 141 is larger than that of the first screen 142. A first discharge port 145 and a second discharge port 146 are fixedly arranged on the sides of the inclined bottom of the first screen 141 and the first screen 142, respectively. Vibration grooves 18 corresponding to the first discharge port 145 and the second discharge port 146 are respectively opened on the side of the screening chamber 1. The vertical length of the vibration groove 18 is greater than the vertical vibration amplitude distance of the vertical vibrating screen 14.

[0029] The vibrating trough 18 is provided with a first material distribution channel 181 and a second material distribution channel 182 on its exterior; a vertical vibration motor 144 is fixedly connected below the support plate. Preferably, the first screen 141 and the first screen 142 are both inclined at an angle of 30 degrees to ensure that polyethylene masterbatch of different particle sizes can be accurately discharged from the screen after screening and smoothly enter the corresponding material distribution channel.

[0030] Furthermore, the support plates 143 on both sides of the vertical vibration motor 144 are provided with collection ports 147; the bottom side of the screening chamber 1 is provided with a top-opening collection box 148 corresponding to the collection port 147. Polyethylene particles with a particle size smaller than the standard size are collected through the collection box 148.

[0031] Furthermore, the dust removal module includes a dust removal chamber 2, a negative pressure fan 21, a Y-shaped flow channel 22, a dust collector bag 23, and a dust removal support frame 24. The dust removal chamber 2 is connected to the screening chamber 1 through the flow hole 15. The negative pressure fan 21 is fixedly installed at the flow hole 15 inside the dust removal chamber 2. The flow hole 15 is located above the Y-shaped intersection point inside the Y-shaped flow channel 22. A partition plate 25 is fixedly installed at the top of the Y-shaped flow channel 22, dividing the dust removal chamber 2 into two parts. Air holes 26 are opened on the partition plate 25, and the dust removal support frame 24 is fixedly connected above the air holes 26. The dust collector bag 23 is fitted and fixed to the outside of the dust removal support frame 24. An exhaust duct 27 connected to the outside is fixedly installed at the top of the dust removal chamber 2. The negative pressure fan 21 generates negative pressure in the screening chamber 1 through the flow hole 15, ensuring that the screened polyethylene dust and impurities can be effectively sucked into the dust removal chamber 2. The Y-shaped flow channel 22 is designed so that the polyethylene dust and impurities collected by the dust collector bag 23 accumulate and settle downwards under the action of gravity, while minimizing the impact of the negative pressure fan 21 on the settled material.

[0032] Preferably, the negative pressure fan 21 is a louvered fan. When the negative pressure fan 21 stops working, the louvers at the fan outlet close to prevent dust from flowing back into the screening chamber 1 and spreading. Furthermore, a dust collection box 28 is provided in a movable pull-out manner on the bottom side of the dust removal chamber 2.

[0033] Preferably, a wetting agent is placed at the bottom of the dust collection box 28. The wetting agent is an oily solution such as liquid paraffin or dioctyl adipate (DOA), or an aqueous solution with added surfactants (such as Tween 80). This is to accelerate the settling of polyethylene dust and impurities.

[0034] Preferably, the polyethylene masterbatch screening device is effectively grounded. This reduces the occurrence of dust and fine particles adhering to the inner wall of the channel due to electrostatic adsorption, as well as the phenomenon of masterbatch agglomeration affecting screening.

[0035] In use, the polyethylene masterbatch to be screened is placed into the feed funnel 12. Under the action of gravity, the masterbatch moves slowly and evenly downward along the spiral path of the spiral dust filter channel 11. The ion wind generated by the ion wind generator 13 blows towards the spiral dust filter channel 11 to neutralize the static charge generated by the polyethylene masterbatch during the screening process. Polyethylene micro dust and dust impurities are screened out through the through holes opened on the spiral dust filter channel 11 and sent into the dust removal chamber 2 under the combined action of the ion wind generator 13 and the negative pressure fan 21.

[0036] The remaining polyethylene masterbatch flows out from the bottom of the spiral dust filter channel 11 and enters the vertical vibrating screen 14. Driven by the vertical vibrating motor 144, it is screened by the inclined first screens 141 and 142. Large-sized particles and agglomerated large-sized masterbatch are retained in the first screen 141 and vibrate into the first distribution channel 181 from the first discharge port 145 for collection. Suitable normal-sized masterbatch is retained in the first screen 142 and vibrates into the second distribution channel 182 from the second discharge port 146 for collection. The remaining small-sized masterbatch is screened through the first screen 142, passes through the collection port 147 on the support plate 143, and enters the collection box 148.

[0037] After the mixed airflow of polyethylene dust and impurities enters the dust removal chamber 2 and passes through the bag filter, the airflow is discharged from the dust removal chamber 2 by the exhaust pipe 27. The accumulated polyethylene dust and impurities agglomerate and settle downwards under the action of gravity, and are adsorbed and collected by the wetting agent in the dust collection box 28.

[0038] This polyethylene masterbatch screening device achieves efficient screening and dust removal functions through the synergistic action of a separation module and a dust removal module. In the separation module, the spiral dust filter channel 11 initially removes dust, the ion air generator 13 eliminates static electricity in the material to prevent screen clogging, and the three-layer structure design of the vertical vibrating screen 14 meets the screening requirements for different particle sizes, with its elastic limiting and fixing method ensuring screening stability. The dust removal module uses a negative pressure fan 21 to draw in dust-laden gas, which is then filtered through a Y-shaped flow channel 22 and a dust collector bag 23 before being discharged as clean gas. The dust collection box 28 collects dust and moistens it to prevent secondary pollution. The entire device effectively improves screening efficiency and quality, reduces dust pollution, and ensures the stability of the production environment and equipment operation, resulting in significant environmental and economic benefits.

[0039] Example 2, see Figure 4 and 5 This embodiment is an improvement on embodiment 1.

[0040] To further enhance the dust removal effect, an electrically heated wire mesh 3 is fixedly installed between the two outer sides of the lower part of the Y-shaped flow channel 22 and the dust removal chamber 2. A balance hole 221 is opened on each of the two bifurcated sides of the upper part of the Y-shaped flow channel 22. During operation, the temperature of the electrically heated wire mesh 3 is maintained between 135°C and 150°C. When polyethylene dust particles that have not been adsorbed and settled by the wetting agent continue to float to the electrically heated wire mesh 3, they are heated and melted. The large amount of accumulated polyethylene dust particles, after melting, will further adhere to impurities and dust, and then, under the action of gravity, drip into the wetting agent. The balance hole 221 allows the airflow in the Y-shaped flow channel 22 within the dust removal chamber 2 to circulate, enhancing the dust removal efficiency of the electrically heated wire mesh 3. This embodiment provides better adsorption and treatment of polyethylene dust particles and impurities, reduces the filtration pressure of the dust collector bag 23, and improves the service life of the dust collector bag 23.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A polyethylene masterbatch screening device, characterized in that: The system includes a separation module and a dust removal module. The separation module comprises a screening chamber, a spiral dust filter channel, a feed hopper, an ion generator, and a vertical vibrating screen. The feed hopper is fixedly connected to the top of the screening chamber, and the outlet of the feed hopper is fixedly connected to the top of the spiral dust filter channel. The surface of the spiral dust filter channel has several through holes communicating with its interior. The bottom of the screening chamber is elastically limited and fixedly equipped with a vertical vibrating screen corresponding to the bottom of the spiral dust filter channel. An ion generator is fixedly connected to the screening chamber on one side of the spiral dust filter channel, and a flow hole is opened on the opposite side of the screening chamber. The screening chamber is connected to the dust removal module through the flow hole.

2. The polyethylene masterbatch screening device according to claim 1, characterized in that: Limiting posts are provided at the four corners of the bottom of the screening chamber, and limiting blocks are integrally fixed at the four corners of the bottom of the vertical vibrating screen. The limiting blocks are movably sleeved on the limiting posts and fixed by bolts. Preload springs are provided between the bottom end of the limiting block and the bolt fixing end of the limiting post.

3. A polyethylene masterbatch screening device according to claim 2, characterized in that: The vertical vibrating screen has a horizontal support plate at its bottom, and a first screen and a second screen are arranged obliquely from top to bottom inside the screen. A first discharge port and a second discharge port are fixedly provided at the inclined bottom edges of the first screen and the second screen, respectively. Vibration grooves corresponding to the first discharge port and the second discharge port are respectively opened on the side of the screening chamber. A first distribution channel and a second distribution channel are respectively provided outside the vibration groove. A vertical vibration motor is fixedly connected below the support plate.

4. A polyethylene masterbatch screening device according to claim 3, characterized in that: The support plates on both sides of the vertical vibration motor are provided with material collection ports; the bottom side of the screening chamber is provided with a top-opening material collection box corresponding to the material collection port.

5. A polyethylene masterbatch screening device according to claim 1 or 4, characterized in that: The dust removal module includes a dust removal chamber, a negative pressure fan, a Y-shaped flow channel, dust collector bags, and a dust removal support frame. The dust removal chamber is connected to the screening chamber through the flow hole. The negative pressure fan is fixedly installed inside the dust removal chamber at the flow hole. The flow hole is located above the Y-shaped intersection point inside the Y-shaped flow channel. A partition plate is fixedly installed at the top of the Y-shaped flow channel, dividing the dust removal chamber into two parts. Air holes are opened on the partition plate, and a dust removal support frame is fixedly installed above the air holes. The dust collector bags are fitted and fixed to the outside of the dust removal support frame. An exhaust duct connected to the outside is fixedly installed at the top of the dust removal chamber.

6. A polyethylene masterbatch screening device according to claim 5, characterized in that: An electrically heated wire mesh is fixedly installed between the two outer sides of the Y-shaped flow channel and the dust removal chamber.

7. A polyethylene masterbatch screening device according to claim 6, characterized in that: The Y-shaped flow channel has balance holes on each of its two bifurcated sides.

8. A polyethylene masterbatch screening device according to claim 7, characterized in that: The dust collection chamber is equipped with a removable, pull-out dust collection box on the bottom side, and the bottom of the dust collection box contains a wetting agent.

Images