Bag-type dust collector with multi-stage filtering structure

Abstract

The utility model provides a bag-type dust collector with a multi-stage filtering structure, and belongs to the field of dust collection equipment. The problems that in the prior art, no multi-stage treatment is used for sharing the filtering load, and comprehensive and efficient dust removal is difficult to achieve in a single operation space when dust-containing gas with complex components and different particle sizes exists are solved. The bag-type dust remover with the multi-stage filtering structure is characterized by comprising a first-stage dust removal bin, the upper end of the first-stage dust removal bin is fixedly connected with a second-stage dust removal bin, the upper sides of the inner ends of the second-stage dust removal bin and the first-stage dust removal bin are fixedly connected with storage transverse plates, and a plurality of small-aperture bag bodies are installed below the storage transverse plate located on the upper side. The two-stage dust removal bin has the advantages that dust of various particle sizes can be efficiently removed through the two-stage dust removal bin, and the overall dust removal efficiency is greatly improved.

Description

Technical Field

[0001] The utility model belongs to the field of dust removal equipment and relates to a bag filter with a multi-stage filtering structure. Background Art

[0002] A bag filter is a dry dust filtering device mainly used to remove particulate matter in dust-containing gas and is widely used in dust treatment in industries such as steel, cement, electric power, chemical industry, and metallurgy. For example, in the sintering, ironmaking, steelmaking and other processes of a steel plant, the bag filter can effectively remove dust in the flue gas and reduce environmental pollution.

[0003] However, since there is no multi-stage treatment in the bag filter to share the filtering load, when facing dust-containing gas with complex components and different particle sizes, it is difficult for a bag filter with a single operation space to achieve comprehensive and efficient dust removal, and the filter bags of the bag filter with a single operation space bear a large pressure. During long-term operation, the filter bags are prone to premature wear and breakage, shortening the service life of the filter bags. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a bag filter with a multi-stage filtering structure and reasonable space utilization in view of the above problems existing in the prior art.

[0005] The purpose of the utility model can be achieved by the following technical solutions:

[0006] A bag filter with a multi-stage filtering structure, characterized in that it includes a primary dust removal bin, the upper end of the primary dust removal bin is fixedly connected with a secondary dust removal bin, the inner upper sides of the secondary dust removal bin and the primary dust removal bin are both fixedly connected with a placement cross plate, a plurality of small-aperture bag bodies are installed under the placement cross plate on the upper side, a plurality of large-aperture bag bodies are installed under the placement cross plate on the lower side, the lower end of the primary dust removal bin is fixedly connected with an air inlet pipe opening, one ends of the primary dust removal bin and the secondary dust removal bin close to each other are fixedly connected with a middle air transmission port, the lower inner walls of the primary dust removal bin and the secondary dust removal bin are both fixedly connected with arc-shaped material guiding plates, and a plurality of one-way air outlet valves are annularly and equidistantly arranged at the upper ends of the arc-shaped material guiding plates.

[0007] In the above-mentioned bag filter with a multi-stage filtering structure, an air outlet pipe opening is installed on the upper right side of the secondary dust removal bin, and the two arc-shaped material guiding plates are respectively located directly above the air inlet pipe opening and the air outlet pipe opening.

[0008] In the above-mentioned bag filter with a multi-stage filtering structure, a plurality of flow-around soft surfaces are fixedly intercepted on the upper inner wall of the arc-shaped material guiding plate.

[0009] In the above bag filter with a multi-stage filtering structure, a plurality of the flow-around soft surfaces and a plurality of corresponding one-way air outlet valves are arranged at intervals in a staggered manner, and a plurality of motors are fixedly connected to the lower end of the storage cross plate.

[0010] In the above bag filter with a multi-stage filtering structure, the output end of the motor is fixedly connected to a self-rotating shaft, and two groups of flapping sheets are symmetrically and fixedly connected to the left and right ends of the self-rotating shaft.

[0011] In the above bag filter with a multi-stage filtering structure, a plurality of springs are fixedly connected between two corresponding flapping sheets in an overlapping state, and the flapping sheets are in contact with the outer side walls of the corresponding small-aperture cloth bags and large-aperture cloth bags.

[0012] In the above bag filter with a multi-stage filtering structure, the aperture of the large-aperture cloth bag is larger than that of the small-aperture cloth bag.

[0013] Compared with the prior art, the bag filter with a multi-stage filtering structure of the present invention realizes the efficient removal of dust of various particle sizes through two-stage dust removal bins, greatly improving the overall dust removal efficiency. At the same time, during the process of the gas passing through the first-stage dust removal bin and the second-stage dust removal bin, arc-shaped guiding plates with a gas diversion and guiding function are arranged at the air inlet and the middle gas delivery port. The one-way air outlet valves arranged in a ring shape in the arc-shaped guiding plates can use their height difference to more evenly distribute the conveyed air flow to the positions below the corresponding cloth bags, so that the usage frequencies of the small-aperture cloth bags and the large-aperture cloth bags are kept consistent. This not only improves the uniformity of gas distribution, ensures that each cloth bag can fully play its filtering role, but also makes the operation of the entire system more stable and efficient, greatly enhancing the performance and reliability of the bag filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a front view sectional structure schematic diagram of the dust removal bin of the bag filter with a multi-stage filtering structure of the present invention;

[0015] Figure 2 is an enlarged structure schematic diagram of the arc-shaped guiding plate of the bag filter with a multi-stage filtering structure of the present invention;

[0016] Figure 3 is an axonometric structure schematic diagram of the self-rotating shaft of the bag filter with a multi-stage filtering structure of the present invention;

[0017] Figure 4 is a side view sectional structure schematic diagram of the flapping sheet of the bag filter with a multi-stage filtering structure of the present invention

[0018] In the figure, 1 is the primary dust removal bin; 2 is the secondary dust removal bin; 3 is the horizontal placement board; 4 is the large-aperture cloth bag body; 5 is the small-aperture cloth bag body; 6 is the middle air inlet; 7 is the arc-shaped material guiding plate; 8 is the one-way air outlet valve; 9 is the self-rotating shaft; 10 is the motor; 11 is the flapping sheet; 12 is the spring; 13 is the air inlet pipe opening; 14 is the air outlet pipe opening; 15 is the flow-around soft surface. Detailed implementation manners

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] It should be noted that when a component is referred to as being "installed on" another component, it can be directly installed on the other component or there may also be an intermediate component. When a component is considered to be "set on" another component, it can be directly set on the other component or there may be an intermediate component at the same time. When a component is considered to be "fixed to" another component, it can be directly fixed to the other component or there may be an intermediate component at the same time.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the description of the present invention in this specification are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The term "or / and" used herein includes any and all combinations of one or more of the related listed items.

[0022] As Figure 1 —4 shows, this bag filter with a multi-stage filtering structure includes a primary dust removal bin 1, the upper end of the primary dust removal bin 1 is fixedly connected with a secondary dust removal bin 2, and horizontal placement boards 3 are fixedly connected to the upper inner sides of both the secondary dust removal bin 2 and the primary dust removal bin 1. A plurality of small-aperture cloth bag bodies 5 are installed under the upper horizontal placement board 3, and a plurality of large-aperture cloth bag bodies 4 are installed under the lower horizontal placement board 3. The lower end of the primary dust removal bin 1 is fixedly connected with an air inlet pipe opening 13, the mutually adjacent ends of the primary dust removal bin 1 and the secondary dust removal bin 2 are fixedly connected with a middle air inlet 6, and arc-shaped material guiding plates 7 are fixedly connected to the lower inner walls of both the primary dust removal bin 1 and the secondary dust removal bin 2. A plurality of one-way air outlet valves 8 are annularly and equidistantly opened at the upper ends of the arc-shaped material guiding plates 7.

[0023] An air outlet port 14 is installed on the upper side of the right end of each of the two secondary dust removal bins 2, and the two arc-shaped material guiding plates 7 are respectively located directly above the air inlet port 13 and the air outlet port 14.

[0024] A plurality of flow-around soft surfaces 15 are fixedly intercepted on the upper inner wall of the arc-shaped material guiding plate 7.

[0025] A plurality of the flow-around soft surfaces 15 and a plurality of corresponding one-way air outlet valves 8 are arranged at intervals and staggered. A plurality of motors 10 are fixedly connected to the lower end of the storage horizontal plate 3.

[0026] The output end of the motor 10 is fixedly connected to a self-rotating shaft 9, and two groups of flapping sheets 11 are symmetrically and fixedly connected to the left and right ends of the self-rotating shaft 9.

[0027] A plurality of springs 12 are fixedly connected between two corresponding overlapping flapping sheets 11, and the flapping sheets 11 are in contact with the outer side walls of the corresponding small-aperture cloth bags 5 and large-aperture cloth bags 4.

[0028] The aperture of the large-aperture cloth bag 4 is larger than that of the small-aperture cloth bag 5.

[0029] In this solution, in the primary dust removal bin 1, larger particles are first removed by the large-aperture cloth bag 4, and then are input into the secondary dust removal bin 2 through the middle air delivery port 6 to ensure that tiny particles are also intercepted, so as to achieve efficient removal of dust of various particle sizes, greatly improving the overall dust removal efficiency. At the same time, during the process of the gas passing through the primary dust removal bin 1 and the secondary dust removal bin 2, an arc-shaped material guiding plate 7 with a gas diversion and guiding function is arranged at the air inlet port 13 and the middle air delivery port 6. The annular one-way air outlet valves 8 in the arc-shaped material guiding plate 7 can use their height difference to more evenly distribute the conveyed air flow to the positions below the corresponding cloth bags, so that the usage frequencies of the small-aperture cloth bags 5 and the large-aperture cloth bags 4 are kept consistent. This not only improves the uniformity of gas distribution, ensures that each cloth bag can fully play its filtering role, but also makes the operation of the whole system more stable and efficient, greatly enhancing the performance and reliability of the bag dust collector. At the same time, the arc-shaped one-way air outlet valve 8 can also slide the back-blow particulate matter through its arc surface and discharge it from the discharge ports at both ends, thereby ensuring the operation efficiency of the primary dust removal bin 1 and the secondary dust removal bin 2. Moreover, a plurality of flow-around soft surfaces 15 that flutter along with the air flow are arranged inside the arc-shaped material guiding plate 7. The flow-around soft surfaces 15 can further increase the turbulence of the air flow, making the air flow distribution more uniform. And a motor 10 is arranged between two adjacent cloth bags. During the back-blow process, the self-rotating shaft 9 can be driven by the motor 10 to rotate, so that the flapping sheet 11 generates a flapping force on the outer wall surface of the corresponding cloth bag, assisting the particulate matter outside it to fall off more thoroughly. At the same time, the spring 12 in the flapping sheet 11 can further improve the hammering effect of the flapping sheet 11.

[0030] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the various technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as falling within the scope described in this specification.

[0031] Those of ordinary skill in the art of this technology should recognize that the above embodiments are only used to illustrate the present utility model and are not intended to limit the present utility model. As long as appropriate changes and variations made to the above embodiments fall within the scope of the substantial spirit of the present utility model, they fall within the scope of protection required by the present utility model.

Claims

1. A bag filter with a multi-stage filtration structure, characterized in that, It includes a primary dust removal bin, the upper end of the primary dust removal bin is fixedly connected with a secondary dust removal bin, both the inner upper sides of the secondary dust removal bin and the primary dust removal bin are fixedly connected with a placement cross plate, a plurality of small-aperture cloth bag bodies are installed under the placement cross plate on the upper side, and a plurality of large-aperture cloth bag bodies are installed under the placement cross plate on the lower side. The lower end of the primary dust removal bin is fixedly connected with an air inlet pipe opening, one end of the primary dust removal bin and the secondary dust removal bin close to each other is fixedly connected with a middle air delivery port, and the lower inner walls of the primary dust removal bin and the secondary dust removal bin are both fixedly connected with arc-shaped guide plates. A plurality of one-way air outlet valves are annularly and equidistantly arranged at the upper ends of the arc-shaped guide plates.

2. The bag filter with a multi-stage filtration structure according to claim 1, wherein, An air outlet pipe opening is installed on the upper right side of the secondary dust removal bin, and the two arc-shaped guide plates are respectively directly above the air inlet pipe opening and the air outlet pipe opening.

3. The bag filter with a multi-stage filtering structure according to claim 2, characterized in that, A plurality of flow-around soft surfaces are fixedly intercepted on the upper inner wall of the arc-shaped guide plate.

4. The bag filter with a multi-stage filtration structure according to claim 3, wherein, A plurality of the flow-around soft surfaces and a plurality of corresponding one-way air outlet valves are arranged at intervals and staggered. A plurality of motors are fixedly connected to the lower ends of the placement cross plates.

5. The bag filter with a multi-stage filtration structure according to claim 4, wherein, The output end of the motor is fixedly connected with a self-rotating shaft, and two groups of flapping thin plates are symmetrically fixedly connected to the left and right ends of the self-rotating shaft.

6. The bag filter with a multi-stage filtration structure according to claim 5, characterized in that, A plurality of springs are fixedly connected between two corresponding overlapping flapping thin plates, and the flapping thin plates are in contact with the outer side walls of the corresponding small-aperture cloth bag bodies and large-aperture cloth bag bodies.

7. The bag filter with a multi-stage filtration structure according to claim 6, characterized in that, The aperture of the large-aperture cloth bag body is larger than that of the small-aperture cloth bag body.

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