A dust suppression device for PET bottle-grade polyester chip production

Abstract

This utility model relates to the technical field of dust suppression devices, specifically disclosing a dust suppression device for PET bottle-grade polyester chip production, including a dust collection hood and an induced draft fan, as well as a primary dust collection box, a secondary washing box, and a circulating purification box. The dust collection hood is connected to the inlet of the induced draft fan via an air inlet pipe, and the outlet of the induced draft fan is connected to the air inlet of the primary dust collection box via a first connecting pipe. The primary dust collection box is equipped with a filter component inside, a dust collection hopper at the bottom, and an air outlet at the top. By combining dry filtration and wet washing, an integrated washing liquid circulation purification and regeneration module is incorporated, which improves the thoroughness of PET dust purification. This solves the limitations of traditional single dust removal methods in removing micro-dust and volatiles, and overcomes the drawbacks of water consumption and secondary pollution associated with wet washing. The device has a clear structure, is easy to maintain, and improves long-term operational stability and ease of operation.

Description

Technical Field

[0001] This utility model relates to the technical field of dust suppression devices, and specifically discloses a dust suppression device for the production of PET bottle-grade polyester chips. Background Technology

[0002] During the production of polyethylene terephthalate (PET) bottle-grade polyester chips, especially in post-processing stages such as drying, screening, conveying, and packaging, friction and collision between materials generate a certain amount of resin dust. This dust not only leads to product loss and affects workshop cleanliness and operator health, but may also affect the appearance quality of the final product. Currently, the common practice for dust control in such production workshops is to install dust collection hoods above the dust-generating points, and then use induced draft fans to extract the dust-laden gas and transport it to dust removal equipment for treatment. Commonly used dust removal technologies mainly include single or simple combinations of dry filtration (such as bag filters and cartridge filters) and wet dust removal (such as water spraying and Venturi scrubbing), aiming to achieve the basic function of gas-solid separation.

[0003] In practical applications, it has been found that existing dust removal solutions are ineffective in handling dust generated during PET chip production. Firstly, dry filtration has limited effectiveness in removing fine dust and potentially accompanying trace amounts of volatile organic compounds. While wet washing can dissolve some gases, direct discharge of the washing liquid can easily lead to water waste and secondary pollution. Secondly, the lightweight and electrostatically charged nature of PET dust makes it prone to adsorption, clogging, or cleaning difficulties in traditional dust removal equipment, affecting the long-term stable operation of the system. Utility Model Content

[0004] This invention proposes a dust removal device for the production of PET bottle-grade polyester chips, which integrates a washing liquid circulation purification and regeneration module, improving the thoroughness of PET dust removal. It solves the limitations of traditional single dust removal methods in removing micro-dust and volatiles, and overcomes the drawbacks of wet washing, such as water consumption and the tendency to generate secondary pollution.

[0005] This utility model is implemented as follows: a dust collection hood and an exhaust fan are provided for the production of PET bottle-grade polyester chips, and also includes a primary dust collection box, a secondary washing box and a circulating purification box. The dust collection hood is connected to the inlet of the induced draft fan through an air inlet pipe, and the outlet of the induced draft fan is connected to the air inlet of the primary dust collector through a first connecting pipe. The primary dust collector is equipped with a filter component inside, a dust collection hopper at the bottom, and an air outlet at the top; The air inlet of the secondary washing tank is connected to the air outlet of the primary dust collector via a second connecting pipe. The interior of the secondary washing tank is filled with washing liquid. The end of the second connecting pipe extends below the surface of the washing liquid. The top of the secondary washing tank is provided with an exhaust port. The circulating purification tank is connected to the bottom of the secondary washing tank through a guide pipe equipped with a valve. The interior of the circulating purification tank is equipped with a purification packing layer, and its top is connected to the top of the secondary washing tank through a circulation pipe equipped with a water pump.

[0006] As a preferred embodiment of the dust removal device for PET bottle-grade polyester chip production according to this utility model, the filter component is a detachable dust removal filter cartridge.

[0007] As a preferred embodiment of the dust removal device for PET bottle-grade polyester chip production according to this utility model, the side wall of the primary dust removal box is provided with an inspection door.

[0008] As a preferred embodiment of the dust reduction device for PET bottle-grade polyester chip production according to this utility model, the side wall of the secondary washing tank is provided with a viewing window for observing the liquid level.

[0009] As a preferred embodiment of the dust reduction device for PET bottle-grade polyester chip production according to this utility model, the purification packing layer in the circulating purification box is an activated carbon layer.

[0010] As a preferred embodiment of the dust suppression device for PET bottle-grade polyester chip production according to this utility model, the bottom of the circulating purification box is provided with a drain outlet, and the drain outlet is provided with a drain valve.

[0011] The beneficial effects of this utility model are: By combining dry filtration and wet washing, an integrated washing liquid circulation purification and regeneration module is used to improve the thoroughness of PET dust purification. This solves the limitations of traditional single dust removal methods in removing micro-dust and volatiles, and overcomes the drawbacks of wet washing such as water consumption and easy secondary pollution. The device has a clear structure, is easy to maintain, and improves the stability and ease of operation in long-term operation. Attached Figure Description

[0012] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0013] Figure 1 This is a front sectional view of the overall structure of this utility model; Figure 2 This is a diagram showing the external structure of the primary dust collector box of this utility model; Figure 3 This is a structural diagram of the external structure of the secondary washing tank of this utility model.

[0014] The markings in the diagram are: 1. Dust collection hood; 2. Exhaust fan; 3. Primary dust collector; 4. Secondary washing box; 5. Circulating purification box; 6. Air inlet pipe; 7. First connecting pipe; 8. Dust collection hopper; 9. Air outlet; 10. Second connecting pipe; 11. Washing liquid; 12. Exhaust port; 13. Valve; 14. Guide pipe; 15. Purification packing layer; 16. Water pump; 17. Circulation pipe; 18. Dust collector filter cartridge; 19. Inspection door; 20. Viewing window; 21. Sewage outlet; 22. Sewage valve. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings and specific embodiments to aid in understanding its content. Unless otherwise specified, the methods used in this invention are conventional methods; the raw materials and apparatus used, unless otherwise specified, are conventional commercially available products.

[0016] Please see Figure 1-3 A dust collection device for the production of PET bottle-grade polyester chips includes a dust collection hood 1 and an exhaust fan 2, as well as a primary dust removal box 3, a secondary washing box 4 and a circulating purification box 5. The dust collection hood 1 is connected to the inlet of the induced draft fan 2 through the air inlet pipe 6, and the outlet of the induced draft fan 2 is connected to the air inlet of the primary dust collector 3 through the first connecting pipe 7. The primary dust collector 3 is equipped with a filter component inside, a dust collection hopper 8 at the bottom, and an air outlet 9 at the top; The air inlet of the secondary washing tank 4 is connected to the air outlet 9 of the primary dust collector 3 through the second connecting pipe 10. The interior of the secondary washing tank 4 is filled with washing liquid 11. The end of the second connecting pipe 10 extends below the liquid surface of the washing liquid 11. The top of the secondary washing tank 4 is provided with an exhaust port 12. The circulating purification tank 5 is connected to the bottom of the secondary washing tank 4 through a guide pipe 14 equipped with a valve 13. The interior of the circulating purification tank 5 is equipped with a purification packing layer 15, and its top is connected to the top of the secondary washing tank 4 through a circulation pipe 17 equipped with a water pump 16.

[0017] In this embodiment: Dust-laden gas is captured at the dust-generating point by the dust collection hood 1 and transported to the primary dust collection box 3 by the induced draft fan 2 for preliminary dry filtration. This process mainly utilizes the filter components inside the box to intercept most of the solid dust and collect it in the dust collection hopper 8 at the bottom, removing the main dust in the airflow and reducing the load on subsequent processing. The preliminarily purified gas enters the secondary washing box 4 from the outlet 9 and is directly introduced into the washing liquid 11 below the liquid surface for bubbling washing through the second connecting pipe 10, thereby effectively dissolving residual fine dust and possible trace amounts of volatile organic compounds, achieving deep purification. The purified gas is discharged from the exhaust port 12. At the same time, in order to realize the regeneration and recycling of the washing liquid 11, the device is equipped with a circulating purification box 5. Wastewater is introduced into the box through the guide pipe 14, and dissolved pollutants and suspended solids are adsorbed and removed by the internal purification packing layer 15. Then, the purified washing liquid 11 is pumped back to the top of the secondary washing box 4 by the water pump 16 through the circulation pipe 17, thus forming a closed circulating water system, achieving the comprehensive effect of saving water resources and avoiding secondary pollution.

[0018] As a technical optimization of this utility model, the filter component is a detachable dust removal filter cartridge 18.

[0019] In this embodiment, a modular filter cartridge is used for filtration. When the dust accumulation on the surface of the filter cartridge reaches a certain level and needs to be cleaned or replaced, it can be easily removed, simplifying maintenance operations and improving the convenience and efficiency of equipment maintenance.

[0020] As a technical optimization of this utility model, the side wall of the primary dust collector 3 is provided with an inspection door 19.

[0021] In this embodiment, it facilitates operators to regularly check the working status of internal filter components (such as dust filter cartridge 18), clean the dust accumulated on the inner wall of the box, or handle abnormal situations, thereby enhancing the maintainability and reliability of the equipment operation.

[0022] As a technical optimization of this utility model, the side wall of the secondary washing tank 4 is provided with a viewing window 20 for observing the liquid level.

[0023] In this embodiment, the operator can intuitively and conveniently monitor the volume of the washing liquid 11, which is convenient for timely replenishment or adjustment, ensuring that the washing process continues effectively and preventing purification failure due to low liquid level.

[0024] As a technical optimization of this utility model, the purification packing layer 15 in the circulating purification box 5 is an activated carbon layer.

[0025] In this embodiment, it can efficiently adsorb organic pollutants, pigments and odor molecules dissolved in the washing liquid 11, significantly improve the purification and regeneration capacity of the washing liquid 11, and ensure the quality of the circulating liquid.

[0026] As a technical optimization of this utility model, the bottom of the circulating purification box 5 is provided with a drain port 21, and the drain port 21 is provided with a drain valve 22.

[0027] In this embodiment: After the purification system has been running for a period of time, sludge or sediment that cannot be adsorbed will accumulate at the bottom of the tank, which can be discharged by opening the drain valve 22.

[0028] The working principle and usage process of this utility model are as follows: First, sufficient washing liquid 11 is injected into the secondary washing tank 4. The induced draft fan 2 is then started, generating negative pressure at the dust collection hood 1. This draws in air containing PET dust generated during production through the air inlet pipe 6. The airflow is then forced into the primary dust collection box 3 through the first connecting pipe 7. The filter components (dust collector filter cartridge 18) inside the box filter the airflow, and the collected dust falls into the dust collection hopper 8. The preliminarily purified gas is then introduced below the surface of the washing liquid 11 in the secondary washing tank 4 through the air outlet 9 and the second connecting pipe 10. The gas passes through the liquid layer in the form of bubbles, where residual dust and soluble substances are captured and dissolved by the washing liquid 11. The clean gas after washing is discharged from the exhaust port 12. At the same time, the dirty washing liquid 11 at the bottom of the secondary washing tank 4 can be slowly flowed into the circulating purification tank 5 through the guide pipe 14 by opening the valve 13 when needed. When it flows through the purification packing layer 15 (activated carbon layer), it is adsorbed and purified. The purified water is pumped back to the top of the secondary washing tank 4 by the water pump 16 through the circulation pipe 17 to complete the circulation. When sludge accumulates at the bottom of the circulating purification tank 5, the drain valve 22 can be opened to discharge it through the drain port 21.

[0029] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] However, the above description is only a specific embodiment of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.

Claims

1. A dust collection device for PET bottle-grade polyester chip production, comprising a dust collection hood (1) and an induced draft fan (2), characterized in that: It also includes a primary dust removal box (3), a secondary washing box (4), and a circulating purification box (5); The dust collection hood (1) is connected to the inlet of the induced draft fan (2) through the air inlet pipe (6), and the outlet of the induced draft fan (2) is connected to the air inlet of the primary dust collector (3) through the first connecting pipe (7). The primary dust collector (3) is equipped with a filter component inside, a dust collection hopper (8) at the bottom, and an air outlet (9) at the top. The air inlet of the secondary washing tank (4) is connected to the air outlet (9) of the primary dust collector (3) through the second connecting pipe (10). The secondary washing tank (4) is filled with washing liquid (11). The end of the second connecting pipe (10) extends below the liquid surface of the washing liquid (11). The top of the secondary washing tank (4) is provided with an exhaust port (12). The circulating purification tank (5) is connected to the bottom of the secondary washing tank (4) through a guide pipe (14) equipped with a valve (13). The interior of the circulating purification tank (5) is provided with a purification packing layer (15), and its top is connected to the top of the secondary washing tank (4) through a circulation pipe (17) equipped with a water pump (16).

2. The dust collection device for PET bottle-grade polyester chip production according to claim 1, characterized in that: The filter element is a detachable dust collector cartridge (18).

3. The dust collection device for PET bottle-grade polyester chip production according to claim 1, characterized in that: The side wall of the primary dust collector (3) is provided with an inspection door (19).

4. The dust collection device for PET bottle-grade polyester chip production according to claim 1, characterized in that: The side wall of the secondary washing tank (4) is provided with a viewing window (20) for observing the liquid level.

5. A dust suppression device for PET bottle-grade polyester chip production according to claim 1, characterized in that: The purification packing layer (15) inside the circulating purification box (5) is an activated carbon layer.

6. A dust collection device for PET bottle-grade polyester chip production according to claim 1, characterized in that: The bottom of the circulating purification box (5) is provided with a drain port (21), and the drain port (21) is provided with a drain valve (22).

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