A dust removal device for recycled plastic particles

Abstract

A dust removal device for recycling plastic particles, comprising a closed linear vibrating screen, a cyclone separator, the feed inlet of the closed linear vibrating screen is connected with the deironing recycled plastic particle source, the screen material outlet of the closed linear vibrating screen is connected with the feed inlet of the cyclone separator, and the gas phase outlet of the cyclone separator and the screen material outlet of the closed linear vibrating screen are connected with the negative pressure source. The utility model discloses simple structure, low in use cost can efficiently carry out dust removal to the recycled plastic particle after deironing, and improve the specification uniformity of recycled plastic particle.

Description

Technical Field

[0001] This utility model relates to the field of plastics processing, and in particular to a dust removal device for recycling plastic particles. Background Technology

[0002] Plastic processing companies use recycled plastic pellets (recycled materials) as raw materials, which are then processed to produce recycled plastic pellet products. This process can reduce plastic waste and achieve resource recycling.

[0003] Before processing, recycled plastic pellets need to undergo iron removal and dust removal processes; otherwise, the quality of the recycled plastic pellets will be unstable, and accidents such as damage to the pelletizing machine may even occur.

[0004] Currently, the dust removal process for recycled plastic granules after iron removal is usually carried out by washing and drying, which consumes a lot of energy and has a long processing cycle.

[0005] Therefore, it is necessary to design a dust removal device with low energy consumption and short processing cycle for recycled plastic pellet raw materials. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of existing technologies by providing a dust removal device for recycling plastic granules. This device has a simple structure, low operating cost, and can efficiently remove dust from recycled plastic granules after iron removal, while also improving the uniformity of the recycled plastic granules' specifications.

[0007] The technical solution of this utility model is: a dust removal device for recycling plastic particles, including a closed linear vibrating screen and a cyclone separator. The feed inlet of the closed linear vibrating screen is connected to the source of iron removal and recycling of plastic particles. The oversize material outlet of the closed linear vibrating screen is connected to the feed inlet of the cyclone separator. The gas phase outlet of the cyclone separator and the undersize material outlet of the closed linear vibrating screen are connected to a negative pressure source.

[0008] The undersize material outlet of the enclosed linear vibrating screen, the gas phase outlet of the cyclone separator, and a dust discharge pipe are connected in parallel. An axial flow fan is installed in the dust discharge pipe, and the downstream end of the dust discharge pipe is located below the liquid surface of a water seal tank to form a water seal.

[0009] The dust discharge pipe branches at its upstream end, and the two branch pipes are respectively connected to the undersize material outlet of the enclosed linear vibrating screen and the gas phase outlet of the cyclone separator through corrugated pipes.

[0010] The water seal tank is provided with an overflow port on its side wall, and the overflow port drains water to the outside through a filter screen.

[0011] The enclosed linear vibrating screen has a slag discharge hole at the lowest point of the screen box, and a gate valve is provided to control its opening and closing.

[0012] The above technical solution has the following beneficial effects: 1. The dust removal device for recycled plastic granules includes a closed linear vibrating screen and a cyclone separator. The feed inlet of the closed linear vibrating screen is connected to the source of the de-ironized recycled plastic granules. The recycled plastic granules, after the de-ironization process, enter the highest point of the screen mesh through the feed inlet of the closed linear vibrating screen. High-frequency vibration causes the dust adhering to the surface of the recycled plastic granules to detach from the granules, completing the initial dust removal. Simultaneously, the recycled plastic granules move towards the lower point of the screen mesh, with most of the detached dust passing through the screen mesh and entering the lower space, while a small amount of dust remains suspended in the upper space. The oversize material outlet of the closed linear vibrating screen is connected to the feed inlet of the cyclone separator; that is, the recycled plastic granules, after initial dust removal, are directly sent to the cyclone separator, carrying a small amount of suspended dust. The gas phase outlet of the cyclone separator and the undersize material outlet of the enclosed linear vibrating screen are connected to a negative pressure source. The negative pressure draws most of the dust from the lower space of the screen mesh out with the air, reducing the concentration of suspended dust in the upper space above the screen. The recycled plastic granules, carrying a small amount of suspended dust, enter the cyclone separator, where they undergo further dust removal by the cyclone. This suspended dust is then drawn out by the negative pressure, resulting in dust-removed recycled plastic granules at the bottom of the cyclone separator. These granules can be used directly as raw materials for recycled plastic granules, ensuring the quality of the recycled plastic granules. Dust removal is carried out in a closed environment, effectively preventing dust pollution in the factory area while ensuring high-efficiency dust removal.

[0013] 2. The undersize material outlet of the enclosed linear vibrating screen, the gas phase outlet of the cyclone separator, and a dust discharge pipe are connected in parallel. An axial flow fan is installed in the dust discharge pipe. The downstream end of the dust discharge pipe is located below the liquid surface of a water seal tank to form a water seal. The enclosed linear vibrating screen and the cyclone separator share a set of axial flow fans, which improves the utilization rate of the axial flow fans and reduces dust removal costs. The downstream end of the dust discharge pipe is sealed by a water seal, so that the discharged dust is intercepted by a small amount of liquid seal water, avoiding air pollution, reducing dust removal costs, and enabling continuous dust removal.

[0014] 3. The upstream end of the dust discharge pipe is bifurcated. The two bifurcated pipes are respectively connected to the undersize material outlet of the closed linear vibrating screen and the gas phase outlet of the cyclone separator through corrugated pipes. This prevents vibration from being transmitted to the dust discharge pipe and the axial flow fan, thus avoiding resonance and ensuring the normal operation of the axial flow fan for a long time.

[0015] 4. An overflow port is provided on the side wall of the water seal tank, and the overflow port drains water to the outside through a filter screen. The dust-containing airflow discharged from the dust discharge pipe contains trace amounts of plastic particles. These plastic particles are intercepted by the filter screen, while the dust suspension can be discharged normally. This ensures the normal water seal of the dust discharge pipe and avoids environmental pollution caused by the discharge of plastic.

[0016] 5. The screen box of the enclosed linear vibrating screen is equipped with a slag discharge hole at the lowest point, and a gate valve is installed to control its opening and closing. Dust and small-diameter plastic particles deposited on the enclosed linear vibrating screen can be discharged through the slag discharge hole, meeting the actual needs of enterprises.

[0017] The following description, in conjunction with the accompanying drawings and specific embodiments, provides further details. Attached Figure Description

[0018] Figure 1 This is a connection diagram of the present invention.

[0019] In the attached diagram, 1 is a closed linear vibrating screen, 11 is the outlet for material on the screen, 12 is the outlet for material under the screen, 2 is a cyclone separator, 3 is a dust discharge pipe, 4 is an axial flow fan, 5 is a water seal tank, 6 is an overflow port, 7 is a filter screen, 8 is a slag discharge hole, and 9 is a gate valve. Detailed Implementation

[0020] See Figure 1 This is a specific embodiment of a dust removal device for recycling plastic granules. The dust removal device for recycling plastic granules includes a closed linear vibrating screen 1 and a cyclone separator 2. Both the closed linear vibrating screen and the cyclone separator are conventional mechanical equipment in the chemical industry. Specifically, the closed linear vibrating screen can be a ZSG linear vibrating screen product manufactured by Xinxiang Dayong Vibration Equipment Co., Ltd., and it is enclosed with a cover to form a closed type, customized as a single-layer screen vibrating screen. A conventional cyclone separator can be used. The feed inlet of the closed linear vibrating screen 1 is connected to the source of iron-removing and recycling plastic granules. Typically, to avoid dust pollution, the source of recycling plastic granules supplies granules to the feed inlet of the closed linear vibrating screen through a pipeline. The oversize material outlet 11 of the enclosed linear vibrating screen 1 is connected to the feed inlet of the cyclone separator 2. The gas phase outlet of the cyclone separator 2 and the undersize material outlet 12 of the enclosed linear vibrating screen 1 are connected to a negative pressure source. In this embodiment, the undersize material outlet 12 of the enclosed linear vibrating screen 1 and the gas phase outlet of the cyclone separator 2 are connected in parallel to a dust discharge pipe 3. Specifically, the upstream end of the dust discharge pipe 3 is bifurcated, and the two bifurcated pipes are respectively connected to the undersize material outlet 12 of the enclosed linear vibrating screen 1 and the gas phase outlet of the cyclone separator 2 through plastic corrugated pipes. An axial flow fan 4 is installed in the dust discharge pipe 3 to provide negative pressure to the enclosed linear vibrating screen and the cyclone separator by high-flow air extraction. The downstream end of the dust discharge pipe 3 is located below the liquid surface of a water seal tank 5 to form a water seal. Specifically, an overflow port 6 is provided on the side wall of the water seal tank 5, and the overflow port 6 drains water to the outside through a filter screen 7.

[0021] To meet the actual needs of enterprises, a slag discharge hole 8 is provided at the lowest point of the screen box of the enclosed linear vibrating screen 1, and a gate valve 9 is provided to control its opening and closing.

[0022] The working principle of this invention is as follows: Recycled plastic granules, after undergoing iron removal, enter the highest point of the screen of a closed linear vibrating screen through the feed inlet. Through high-frequency vibration, the granules move towards the lower point of the screen for preliminary dust removal. The pre-dust-removed granules are then sent to a cyclone separator, carrying a small amount of suspended dust. A high-flow-rate axial flow fan draws out most of the dust from the lower space of the screen, reducing the concentration of suspended dust in the upper space. The recycled plastic granules carrying a small amount of suspended dust enter the cyclone separator, where they undergo further dust removal. This suspended dust is then extracted by the axial flow fan, resulting in dust-removed recycled plastic granules at the bottom of the cyclone separator. These granules can be used directly as raw materials for recycled plastic granules. The dust-laden air discharged from the dust exhaust pipe passes through a water seal tank containing liquid seal water, where the dust is trapped, while the air is naturally discharged. The liquid seal water containing suspended dust is filtered and discharged, and tap water is added to maintain the trapping effect on the dust-laden airflow.

Claims

1. A dust removal device for recycling plastic granules, characterized in that: Includes a closed linear vibrating screen (1) and a cyclone separator (2). The feed inlet of the closed linear vibrating screen (1) is connected to the iron removal and recycling plastic particle source. The oversize material outlet (11) of the closed linear vibrating screen (1) is connected to the feed inlet of the cyclone separator (2). The gas phase outlet of the cyclone separator (2) and the undersize material outlet (12) of the closed linear vibrating screen (1) are connected to the negative pressure source.

2. The dust removal device for recycling plastic particles according to claim 1, characterized in that: The undersize material outlet (12) of the closed linear vibrating screen (1), the gas phase outlet of the cyclone separator (2), and a dust discharge pipe (3) are connected in parallel. An axial flow fan (4) is installed in the dust discharge pipe (3), and the downstream end of the dust discharge pipe (3) is located below the liquid surface of a water seal tank (5) to form a water seal.

3. The dust removal device for recycling plastic particles according to claim 2, characterized in that: The dust discharge pipe (3) is bifurcated at its upstream end, and the two bifurcated pipes are respectively connected to the undersize material outlet (12) of the closed linear vibrating screen (1) and the gas phase outlet of the cyclone separator (2) through corrugated pipes.

4. The dust removal device for recycling plastic particles according to claim 2, characterized in that: The water seal tank (5) is provided with an overflow port (6) on its side wall, and the overflow port (6) drains water to the outside through a filter screen (7).

5. The dust removal device for recycling plastic particles according to claim 1, characterized in that: The closed linear vibrating screen (1) has a slag discharge hole (8) at the lowest point of the screen box, and a gate valve (9) is provided to control its opening and closing.

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