High-clean-air-box top air inlet structure of cloth bag dust collector

Abstract

The utility model relates to a high clean air tank top air inlet structure of cloth bag dust collector, including high clean air tank and the middle tank for arranging filter bag subassembly, its technical key point is: high clean air tank middle part is arranged a row of vertical ventilation pipeline, each vertical ventilation pipeline's upper end leads out high clean air tank top surface and jointly connects a transverse air inlet pipeline, is equipped with the flow cone body that corresponds with vertical ventilation pipeline one one in the middle tank, the flow cone body is wide and narrow and the upper port is connected fixed with corresponding vertical ventilation pipeline lower port, is equipped with the flow hole group on the lateral wall of flow cone body, the middle tank is equipped with vertical flow uniform plate in each flow cone body's side position to filter bag subassembly, be equipped with the flow uniform hole group on vertical flow uniform plate. The utility model has solved the problem that the existing air inlet structure restricts dust removal efficiency, shortens filter bag life, realizes airflow uniform distribution, reduces filter bag wear and tear, improves dust removal efficiency and operating stability.

Description

Technical Field

[0001] This utility model relates to the technical field of baghouse dust collectors, specifically to a top air inlet structure for a high-cleanliness air box of a baghouse dust collector. Background Technology

[0002] Currently, common air inlet methods for baghouse dust collectors include horizontal air inlet and top air inlet. Among them, the horizontal air inlet method results in high overall resistance of the dust collector and uneven airflow distribution, leading to localized wear of the filter bags; although the traditional top air inlet method can utilize gravity to pre-separate some dust, it still suffers from problems such as airflow impacting the filter bags and large resistance fluctuations.

[0003] In summary, the design of the air inlet structure in the existing technology fails to fully combine the requirements of dust settling and airflow uniformity, which limits the improvement of dust removal efficiency and shortens the filter bag life. Utility Model Content

[0004] The purpose of this invention is to provide a high-cleanliness air box top air inlet structure for a bag filter dust collector that is structurally reasonable and reliable in use, thereby solving the problems of existing air inlet structures restricting dust removal efficiency and shortening filter bag life, achieving uniform airflow distribution, reducing filter bag wear, improving dust removal efficiency and operational stability.

[0005] The technical solution of this utility model is: A top-inlet structure for a high-cleanliness air chamber in a baghouse dust collector includes a high-cleanliness air chamber and a middle chamber for arranging filter bag assemblies. The key technical features are: a row of vertical ventilation ducts is arranged in the middle of the high-cleanliness air chamber; the upper ends of each vertical ventilation duct extend out of the top surface of the high-cleanliness air chamber and are connected to a common horizontal air inlet duct; the middle chamber contains guide cones corresponding to the vertical ventilation ducts; the guide cones are wider at the top and narrower at the bottom, with their upper ends fixedly connected to the lower ends of the corresponding vertical ventilation ducts; the side walls of the guide cones are provided with guide hole groups; and the middle chamber has a vertical flow equalization plate located on the side of each guide cone facing the filter bag assembly, with flow equalization hole groups on the vertical flow equalization plate.

[0006] The high-cleanliness air box top air inlet structure of the bag filter described above has an opening rate of 10%-25% and a thickness of 3mm-5mm for the vertical flow distribution plate.

[0007] In the high-cleanliness air box top air inlet structure of the bag filter described above, the guide cone is a square pyramid with a cone angle of 10°-30°.

[0008] The high-cleanliness air box top air inlet structure of the bag filter described above has two vertical flow equalization plates located on the same side of the two adjacent guide cones with a set distance.

[0009] In the high-cleanliness air box top air inlet structure of the bag filter described above, the guide cone is formed by connecting multiple cone rings, and the two adjacent cone rings of the same guide cone are fixed by flange connection.

[0010] In the high-cleanliness air box top air inlet structure of the bag filter described above, each of the guide cones corresponds to two vertical flow equalization plates, and the two vertical flow equalization plates are symmetrically arranged on both sides of the guide cone.

[0011] The beneficial effects of this utility model are: 1. Dust-laden gas is diverted through the horizontal inlet duct at the top of the high-cleanliness air chamber into various vertical ventilation ducts. From there, it flows to the corresponding guide cones, where it diffuses outwards through the guide holes into the middle chamber. Most of the gas then passes through the vertical flow equalization plate for rectification before finally reaching the area containing the filter bag assembly within the middle chamber. During this process, the guide cones and vertical flow equalization plate work synergistically to rectify the dust-laden gas vertically and circumferentially, significantly improving the uniformity of airflow distribution in the filter bag area. This increases the airflow uniformity coefficient to over 0.9, preventing severe localized wear on the filter bag assembly and thus extending its service life.

[0012] 2. The guide cone achieves pre-separation of coarse particles in the airflow, with a pre-separation efficiency of 30%-40%, reducing the filtration load of the filter bag assembly and significantly improving dust removal efficiency. The total dust removal efficiency can reach over 99.95%, making it especially suitable for high-concentration dust conditions (inlet concentration ≥30g / m³).

[0013] 3. The synergistic effect of the guide cone and the vertical flow equalization plate optimizes the flow field in the middle box. Combined with the stable flow field formed by the top air inlet of the high-cleanliness air box, the resistance fluctuation range of the filter bag assembly can be reduced by 20%.

[0014] 4. The top air intake structure of the high-cleanliness air box also saves space. Attached Figure Description

[0015] This utility model is described in conjunction with the accompanying drawings.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model (vertical flow equalization plate omitted); Figure 2 yes Figure 1 The right view; Figure 3 This is a top view of the arrangement structure of each guide cone of this utility model; Figure 4 This is a schematic diagram of the arrangement structure of each vertical flow equalization plate on the same side of this utility model. Figure 5 This is a schematic diagram of the flow guide cone of this utility model; Figure 6 yes Figure 5 The right view.

[0017] In the diagram: 1. Horizontal air intake duct, 2. Vertical ventilation duct, 3. High-cleanliness air box, 4. Guide cone, 401. Cone ring, 402. Guide hole group, 5. Middle box, 6. Vertical flow equalization plate, 7. Exhaust hole group. Detailed Implementation

[0018] The present invention will be described in detail with reference to the accompanying drawings.

[0019] like Figures 1-6 As shown, the high-cleanliness air box top air inlet structure of the bag filter includes a high-cleanliness air box 3 and a middle box 5 for arranging filter bag assemblies.

[0020] The high-cleanliness air box 3 has a row of four vertical ventilation ducts 2 arranged in the middle. The upper end of each vertical ventilation duct 2 leads out of the top surface of the high-cleanliness air box 3 and is connected to a horizontal air intake duct 1.

[0021] The middle box 5 is equipped with guide cones 4 that correspond one-to-one with the vertical ventilation ducts 2. Each guide cone 4 is wider at the top and narrower at the bottom, with its upper port connected and fixed to the lower port of the corresponding vertical ventilation duct 2. The sidewall of each guide cone 4 has a group of guide holes 402. In this embodiment, the guide cone 4 is made of wear-resistant steel plate. The guide cone 4 is a square pyramid shape with a cone angle of 10°-30°. Each guide cone 4 is formed by connecting multiple cone rings 401. Two adjacent cone rings 401 on the same guide cone 4 are connected and fixed using flanges to enhance impact resistance.

[0022] The middle box 5 has a vertical flow equalization plate 6 on the side of each flow guide cone 4 facing the filter bag assembly. The vertical flow equalization plate 6 has a group of flow equalization holes, and the opening density of the upper part of the vertical flow equalization plate 6 is greater than that of the lower part. In this embodiment, the opening ratio of the vertical flow equalization plate 6 is 10%-25%, and the thickness is 3mm-5mm. Each flow guide cone 4 corresponds to two vertical flow equalization plates 6, and the two vertical flow equalization plates 6 are symmetrically arranged on both sides of the flow guide cone 4. The two vertical flow equalization plates 6 located on the same side of two adjacent flow guide cones 4 are spaced apart by a set distance.

[0023] Working principle: 1. Filter bag assemblies are symmetrically arranged on both sides of the guide cone 4 in the middle box 5 (omitted in the figure). An exhaust port group 7, communicating with the high-purity air box 3, is provided on the top surface of the middle box 5 above the filter bag assemblies.

[0024] 2. Dust-laden gas is diverted into each vertical ventilation duct 2 through the horizontal air inlet pipe 1 at the top of the high-cleanliness air box 3. Then, it goes to the corresponding guide cone 4 through the vertical ventilation duct 2. After passing through the guide hole group 402 of the guide cone 4, it overflows and diffuses into the middle box 5. Then, most of the gas is rectified again by the vertical flow equalization plate 6 and finally goes to the area where the filter bag assembly is located in the middle box 5. A small part of the gas is dispersed to the area where the filter bag assembly is located in the middle box 5 through the part between two adjacent vertical flow equalization plates 6, so as to avoid excessive airflow resistance.

[0025] 3. The purified gas enters the high-purity gas box 3 through the exhaust port group 7, and then goes to the exhaust pipe.

[0026] The embodiments of this utility model have been described in detail above, but the content described is only a preferred embodiment of this utility model and should not be considered as limiting the scope of implementation of this utility model. All equivalent changes and improvements made within the scope of this utility model should still fall within the scope of this utility model.

Claims

1. A top-inlet structure for a high-cleanliness air chamber in a baghouse dust collector, comprising a high-cleanliness air chamber and a middle chamber for arranging filter bag assemblies, characterized in that: A row of vertical ventilation ducts is arranged in the middle of the high-cleanliness air box. The upper end of each vertical ventilation duct leads out of the top surface of the high-cleanliness air box and is connected to a horizontal air inlet duct. The middle box is equipped with a flow guide cone that corresponds to each vertical ventilation duct. The flow guide cone is wider at the top and narrower at the bottom, and its upper port is connected and fixed to the lower port of the corresponding vertical ventilation duct. The side wall of the flow guide cone is equipped with a flow guide hole group. The middle box is equipped with a vertical flow equalization plate on the side of each flow guide cone facing the filter bag assembly. The vertical flow equalization plate is equipped with a flow equalization hole group.

2. The high-cleanliness air box top air inlet structure of the bag filter according to claim 1, characterized in that: The vertical flow equalization plate has an opening ratio of 10%-25% and a thickness of 3mm-5mm.

3. The high-cleanliness air box top air inlet structure of the bag filter according to claim 1, characterized in that: The flow guide cone is a square pyramid with a cone angle of 10°-30°.

4. The high-cleanliness air box top air inlet structure of the bag filter according to claim 1, characterized in that: The two vertical flow equalization plates located on the same side of the two adjacent flow guide cones are spaced at a set distance.

5. The high-cleanliness air box top air inlet structure of the bag filter according to claim 1, characterized in that: The flow guide cone is formed by connecting multiple conical rings. The two adjacent conical rings of the same flow guide cone are fixed by flange connection.

6. The high-cleanliness air box top air inlet structure of the bag filter according to claim 1, characterized in that: Each of the flow guide cones corresponds to two vertical flow equalization plates, which are symmetrically arranged on both sides of the flow guide cone.

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