A bag-type explosion-proof dust collector

Abstract

This utility model discloses a baghouse explosion-proof dust collector, including a baghouse dust collector body. A bent pipe is fixedly connected to the dust inlet of the baghouse dust collector body. A mixing box is fixedly connected to the bottom of the bent pipe. Multiple Venturi components are fixedly connected to one side of the outer surface of the mixing box. Each Venturi component has an external contraction tube fixedly connected to its dust inlet end, and an internal contraction tube is provided inside the external contraction tube. In this utility model, by setting up a synergistic structure of multiple Venturi components and an inert gas distribution pipe, the inert gas and dust-laden airflow can be fully mixed before dust enters the baghouse dust collector body, effectively reducing the oxygen concentration in the system and significantly improving the explosion-proof safety of the dust collection equipment. It is particularly suitable for industrial scenarios handling flammable and explosive dust. This design improves inerting efficiency through airflow dynamics optimization while maintaining the original filtration performance of the dust collection system.

Description

Technical Field

[0001] This utility model relates to the technical field of bag dust collectors, and in particular to a bag-type explosion-proof dust collector. Background Technology

[0002] A baghouse dust collector is a dry dust filtration device. It is suitable for collecting fine, dry, non-fibrous dust. The filter bags are made of woven filter cloth or non-woven felt, utilizing the filtration effect of the fibrous fabric to filter dust-laden gas. When the dust-laden gas enters the baghouse dust collector, larger, heavier dust particles settle down due to gravity and fall into the ash hopper. The gas containing finer dust particles is purified as it passes through the filter media, as the dust is trapped.

[0003] In existing technologies, baghouse dust collectors pose significant safety hazards when handling flammable and explosive dust. Traditional explosion-proof designs often employ simple explosion venting devices or external inert gas injection methods, which have the following main drawbacks:

[0004] Uneven mixing of inert gas and dust-laden airflow leads to areas of excessively high oxygen concentration within the dust removal system, making it impossible to effectively eliminate the risk of explosion. Existing technologies using top-injection or single-point-injection methods struggle to achieve sufficient airflow mixing, especially when dealing with high-concentration dust.

[0005] Conventional explosion-proof structures often result in a significant increase in system pressure loss, severely impacting dust removal efficiency and leading to increased energy consumption. Existing Venturi mixing devices mostly employ a single-stage design with unreasonable airflow organization, failing to guarantee mixing effectiveness and increasing unnecessary resistance losses.

[0006] Therefore, a bag-type explosion-proof dust collector is proposed. Utility Model Content

[0007] The purpose of this utility model is to overcome the shortcomings of the existing technology and propose a bag-type explosion-proof dust collector.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: a bag-type explosion-proof dust collector, comprising a bag-type dust collector body, wherein a bent pipe is fixedly connected to the dust inlet of the bag-type dust collector body, a mixing box is fixedly connected to the bottom of the bent pipe, a plurality of Venturi components are fixedly connected to one side of the outer surface of the mixing box, an outer shrink tube is fixedly connected to the dust inlet end of each of the plurality of Venturi components, an inner shrink tube is provided on the inner side of each of the plurality of outer shrink tubes, a large flange is fixedly connected to the dust inlet end of each of the plurality of inner shrink tubes and the dust inlet end of the outer shrink tubes, and a dust inlet box is fixedly connected to the plurality of large flanges.

[0009] The tops of the multiple external contraction fittings are jointly fixed and interconnected with an inert gas distribution pipe.

[0010] Furthermore, each of the aforementioned Venturi components includes a small connecting flange, and the small connecting flange is fixedly interconnected with the mixing chamber. A thin tube is fixedly interconnected at one end of the small connecting flange, a long tapered tube is fixedly interconnected at one end of the thin tube, and a short tapered tube is fixedly interconnected at the small opening of the long tapered tube. This structural design creates a Venturi effect through a gradually narrowing and expanding flow channel, which significantly improves the mixing efficiency of inert gas and dust-laden airflow, ensuring that the oxygen concentration is uniformly reduced to a safe level.

[0011] Furthermore, each of the aforementioned external contraction fittings includes a large contraction tube, and the large contraction tube is fixedly interconnected with the short tapered tube. The large opening of the large contraction tube is fixedly interconnected with an outer thick tube, and the outer thick tube is fixedly connected to a large flange. This multi-stage contraction and expansion structure effectively reduces airflow resistance.

[0012] Furthermore, the top of the outer thick tube is fixedly connected to a connecting pipe, and the connecting pipe is fixedly connected to the adjacent gas outlet of the inert gas distribution pipe. This connection method realizes the uniform distribution of inert gas, so that each Venturi unit can obtain a stable gas supply.

[0013] Furthermore, each of the aforementioned internal contraction pipe fittings includes a small contraction pipe, which is located inside the large contraction pipe. The dust outlet end of the small contraction pipe is fixedly interconnected with multiple fixed pipes, and the large opening of the small contraction pipe is fixedly interconnected with an inner thick pipe. The inner thick pipe is fixedly interconnected with the large flange. The nested design of the inner and outer pipe fittings ensures structural strength and forms an optimized airflow channel.

[0014] Furthermore, the dust inlet end of the dust inlet box is fixedly connected to an assembly pipe. This standardized interface design facilitates connection with piping systems of different specifications, improving the applicability and ease of installation of the equipment.

[0015] The beneficial effects of this utility model are:

[0016] 1. In use, this utility model, through the synergistic structure of multiple Venturi components and inert gas distribution pipes, enables thorough mixing of inert gas and dust-laden airflow before dust enters the bag filter body, effectively reducing the oxygen concentration within the system and significantly improving the explosion-proof safety of the dust removal equipment. It is particularly suitable for industrial scenarios handling flammable and explosive dust. This design improves inerting efficiency through airflow dynamics optimization while maintaining the original filtration performance of the dust removal system.

[0017] 2. When in use, the unique layout of the mixing box and the Venturi assembly forms a multi-stage airflow mixing channel, which not only improves the mixing uniformity of inert gas and dust, but also optimizes the airflow distribution through the coordinated design of the inner and outer shrinkage pipes. While ensuring the explosion-proof effect, it reduces the system pressure loss, enabling the equipment to maintain stable dust removal efficiency and low energy consumption during long-term operation. Attached Figure Description

[0018] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0020] Figure 2 This is a partial three-dimensional structural schematic diagram of the present invention;

[0021] Figure 3 This is a three-dimensional structural diagram of the connection between the Venturi assembly and the outer shrink tube of this utility model;

[0022] Figure 4 This is a cross-sectional view of the connection between the Venturi assembly and the outer shrink tube of this utility model.

[0023] The attached figures are labeled as follows:

[0024] 1. Baghouse dust collector body; 2. Bend; 3. Inert gas distribution pipe; 4. Assembly pipe; 5. Dust inlet box; 6. Mixing box; 7. Thin pipe; 8. Large shrinkage pipe; 9. Long tapered pipe; 10. Small connecting flange; 11. Short tapered pipe; 12. Connecting pipe; 13. Outer thick pipe; 14. Large flange; 15. Fixed pipe; 16. Small shrinkage pipe; 17. Inner thick pipe. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0026] like Figures 1-4 As shown, a bag-type explosion-proof dust collector is disclosed, including a bag-type dust collector body 1. A bent pipe 2 is fixedly connected to the dust inlet of the bag-type dust collector body 1. A mixing box 6 is fixedly connected to the bottom of the bent pipe 2. The mixing box 6 and the bent pipe 2 are fixed together by flanges and bolts, which facilitates disassembly and assembly. A sealing ring is provided at the connection to ensure the sealing of the connection.

[0027] Multiple Venturi assemblies are fixedly connected to one side of the outer surface of the mixing tank 6. Each Venturi assembly includes a small connecting flange 10, and the small connecting flange 10 and the mixing tank 6 are fixedly connected together. A thin tube 7 is fixedly connected to one end of the small connecting flange 10, and a long tapered tube 9 is fixedly connected to one end of the thin tube 7. A short tapered tube 11 is fixedly connected to the small opening of the long tapered tube 9. The small connecting flange 10 and the mixing tank 6 are fixed with bolts, and a sealing ring is provided at the connection to ensure the sealing of the connection.

[0028] Multiple Venturi components have external shrinkage fittings fixedly connected to their dust inlet ends. Internal shrinkage fittings are located inside the multiple external shrinkage fittings. The dust inlet ends of the multiple internal shrinkage fittings and the external shrinkage fittings are all fixedly connected to a large flange 14. The multiple large flanges 14 are fixedly connected to a dust inlet box 5. Each of the multiple external shrinkage fittings includes a large shrinkage tube 8, and the large shrinkage tube 8 is fixedly connected to a short tapered tube 11. An external thicker tube 13 is fixedly connected to the large opening of the large shrinkage tube 8, and the external thicker tube 13 is fixedly connected to the large flange 14. The top of the external thicker tube 13 is fixedly connected to... A connecting pipe 12 is provided, and the connecting pipe 12 is fixedly connected to the adjacent outlet of the inert gas distribution pipe 3. Multiple internal shrinkage pipes include small shrinkage pipes 16, and the small shrinkage pipes 16 are located inside the large shrinkage pipe 8. Multiple fixed pipes 15 are fixedly connected to the dust outlet end of the small shrinkage pipes 16. An inner thick pipe 17 is fixedly connected to the large opening of the small shrinkage pipes 16, and the inner thick pipe 17 is fixedly connected to the large flange 14. The large flange 14 is fixed to the dust inlet box 5 by bolts, which facilitates the disassembly and assembly of the large flange 14. The connection is provided with a seal to ensure the sealing of the connection.

[0029] The dust inlet end of the dust inlet box 5 is fixedly connected to the assembly pipe 4. Support legs (unlabeled) can be welded to the bottom of the dust inlet box 5 and the mixing box 6 to improve the stability of the equipment.

[0030] The tops of the multiple external contraction fittings are jointly fixed and interconnected with an inert gas distribution pipe 3. An external nitrogen generator (such as a PSA nitrogen generator or a liquid nitrogen vaporization device) is connected to the inert gas distribution pipe 3 through a high-pressure hose or metal pipe.

[0031] Working principle: Dust entry stage: The dust-laden airflow enters the dust inlet box 5 through the assembly pipe 4, and is distributed to multiple inner thick pipes 17 and small shrink pipes 16 via the large flange 14.

[0032] After the dust is accelerated by the conical structure of the inner constriction tube, it enters the Venturi assembly (thin tube 7 → short conical tube 9 → long conical tube 11) and forms a high-speed jet.

[0033] Inert gas mixing stage: An external nitrogen generator (not shown) is connected to the inert gas distribution pipe 3 through a pipeline, and nitrogen enters the outer thick pipe 13 and the large shrink pipe 8 through the connecting pipe 12.

[0034] Due to the Venturi effect, a negative pressure zone is formed at the short cone tube 11 for the high-speed dust airflow, which actively draws in nitrogen gas, thereby achieving forced mixing of dust and inert gas.

[0035] After mixing, the mixture enters the dust removal stage: the mixed low-oxygen dust airflow enters the mixing box 6, and then is conveyed to the bag filter body 1 through the bend pipe (2) for filtration. The filtered clean gas is discharged, and the dust is captured by the filter bags and cleaned periodically by the pulse cleaning system (not shown).

[0036] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A cloth bag type explosion-proof dust collector comprising a bag type dust collector body (1), characterized in that: The dust inlet of the bag filter body (1) is fixedly connected to a bend (2), the bottom of the bend (2) is fixedly connected to a mixing box (6), one side of the outer surface of the mixing box (6) is fixedly connected to multiple Venturi components, the dust inlet ends of the multiple Venturi components are all fixedly connected to external shrinkage pipes, the inner side of the multiple external shrinkage pipes is provided with internal shrinkage pipes, the dust inlet ends of the multiple internal shrinkage pipes and the dust inlet ends of the external shrinkage pipes are all fixedly connected to a large flange (14), and the multiple large flanges (14) are all fixedly connected to a dust inlet box (5). The tops of the multiple external contraction fittings are jointly fixed and interconnected with an inert gas distribution pipe (3).

2. A cloth bag type explosion-proof dust collector according to claim 1, characterized in that: Each of the Venturi components includes a small connecting flange (10), and the small connecting flange (10) and the mixing box (6) are fixedly connected. A thin tube (7) is fixedly connected to one end of the small connecting flange (10), a long tapered tube (9) is fixedly connected to one end of the thin tube (7), and a short tapered tube (11) is fixedly connected to the small opening of the long tapered tube (9).

3. A cloth bag type explosion-proof dust collector according to claim 2, characterized in that: Each of the aforementioned external contraction fittings includes a large contraction tube (8), and the large contraction tube (8) is fixedly interconnected with the short tapered tube (11). The large opening of the large contraction tube (8) is fixedly interconnected with an outer thick tube (13), and the outer thick tube (13) is fixedly connected to the large flange (14).

4. The baghouse explosion-proof dust collector according to claim 3, characterized in that: The top of the outer thick pipe (13) is fixedly connected to a connecting pipe (12), and the connecting pipe (12) is fixedly connected to the adjacent outlet of the inert gas distribution pipe (3).

5. The cloth bag type explosion-proof dust collector according to claim 3, characterized in that: Each of the aforementioned internal shrinkage fittings includes a small shrinkage tube (16), and the small shrinkage tube (16) is located inside the large shrinkage tube (8). The dust outlet end of the small shrinkage tube (16) is fixedly connected to multiple fixed tubes (15), and the large opening of the small shrinkage tube (16) is fixedly connected to an inner thick tube (17), and the inner thick tube (17) is fixedly connected to the large flange (14).

6. The cloth bag type explosion-proof dust collector according to claim 1, characterized in that: The dust inlet end of the dust inlet box (5) is fixedly connected to the assembly pipe (4).

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