Flue gas purification device for foundry plant dust removal

Abstract

The application relates to a flue gas purification device for dust removal in a foundry workshop, and belongs to the technical field of waste gas treatment in a foundry workshop. The device comprises a pulse bag dust collector, an iron removal mechanism is connected to the pulse bag dust collector, the iron removal mechanism comprises a dust hopper, an electric push rod and an iron removal assembly arranged in the dust hopper, the iron removal assembly comprises a top cover and a plurality of adsorbing iron blocks arranged side by side at the bottom of the top cover, the surface of the adsorbing iron blocks is wrapped with a protective sleeve, and the protective sleeve is fixed at the bottom of the top cover. According to the application, the waste gas in the foundry workshop enters the dust hopper first, and then enters the pulse bag dust collector. When the waste gas enters the dust hopper, the airflow suddenly spreads, the flow rate suddenly decreases, the dust with a relatively large particle size directly falls into the dust hopper under the action of gravity, the adsorbing iron blocks adsorb the waste iron in the airflow, the waste iron is prevented from entering the pulse bag dust collector, and the influence on the filter bag is greatly reduced.

Description

Technical Field

[0001] This application relates to the technical field of waste gas treatment in foundry workshops, and in particular to a flue gas purification device for dust removal in foundry workshops. Background Technology

[0002] To meet environmental protection requirements, foundry workshops must use flue gas purification devices to purify workshop exhaust gases before emission. Currently, pulse-jet baghouse dust collectors are commonly used for this purpose. These are dry dust filtration devices widely used in industrial fields to capture fine, dry, non-fibrous dust. Their core principle is to filter dust-laden gas through filter bags made of woven or non-woven felt. The filter bags utilize the filtration effect of the woven fabric to filter the dust-laden gas. When the dust-laden gas enters the baghouse dust collector, larger, heavier dust particles settle 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. Baghouse dust collectors are characterized by high cost-effectiveness and high filtration efficiency.

[0003] However, during the casting process in the foundry, a lot of iron filings are generated, resulting in a large amount of iron filings in the exhaust gas. When the exhaust gas containing iron filings enters the pulse bag dust collector, the iron filings have high hardness. When they impact the surface of the filter bag with the airflow, they will cause wear on the filter material fibers and shorten the life of the filter bag. At the same time, iron filings are easy to adhere to the surface of the filter bag, clogging the micropores of the filter bag, which will worsen the air permeability and cause the resistance to rise sharply.

[0004] Therefore, it is urgent to improve the flue gas purification devices used in existing foundry workshops. Utility Model Content

[0005] The purpose of this application is to provide a flue gas purification device for dust removal in a foundry workshop, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this application provides a flue gas purification device for dust removal in a foundry workshop, employing the following technical solution: A flue gas purification device for dust removal in a foundry workshop includes a pulse bag filter dust collector. An iron removal mechanism is connected to the side of the pulse bag filter dust collector. The iron removal mechanism includes a dust collection hopper, an electric push rod, and an iron removal assembly disposed within the dust collection hopper. The iron removal assembly includes a top cover and multiple iron-absorbing blocks arranged side-by-side at the bottom of the top cover. The surface of each iron-absorbing block is covered with a protective sleeve, which is fixed to the bottom of the top cover. The iron-absorbing blocks are arranged parallel to the airflow direction. Electric push rods are symmetrically fixed on both sides of the dust collection hopper. The top cover is fixed to the piston rod end of the electric push rod. A sealing gasket is provided between the top cover and the dust collection hopper. A C-shaped clamp is also provided between the top cover and the dust collection hopper.

[0007] Preferably, the bottom of the top cover is also provided with multiple U-shaped frames arranged side by side, the protective sleeve is fixed to the bottom of the U-shaped frames, and a spoiler is also provided inside the U-shaped frames, the spoiler being arranged perpendicular to the U-shaped frames.

[0008] By adopting the above technical solution and setting up a baffle, the airflow impacts the baffle, which can further reduce the airflow velocity, allowing larger dust particles to fall directly into the dust collection hopper under the action of gravity. In addition, the scrap iron in the airflow is more easily captured by the iron-absorbing block, resulting in a better iron removal effect.

[0009] The pulse bag filter includes a dust collection chamber, a purification chamber located above the dust collection chamber, and a dust collection hopper located below the dust collection chamber. A number of filter bags are evenly arranged in the dust collection chamber. An air duct is provided in the purification chamber. A blowpipe is installed on the air duct corresponding to the position of the filter bag. An air manifold is connected to the outside of the air duct, and a pulse valve is connected to the air manifold.

[0010] Preferably, the ash hopper has an air inlet on its side, the purification chamber has an air outlet on its side, and the ash hopper is connected to the air inlet on its side.

[0011] By adopting the above technical solution, an air inlet is opened on the side of the ash hopper, and a bottom air intake method is adopted. Its main features are stable airflow, easy installation and adjustment of filter bags, relatively simple structure and low cost.

[0012] Both the ash collection hopper and the ash receiving hopper are equipped with waste discharge pipes at their bottoms, and valves are installed inside the waste discharge pipes.

[0013] Preferably, the surface of the protective cover is smooth in order to facilitate the scraping of scrap iron off the protective cover.

[0014] In summary, this application includes at least one of the following beneficial technical effects: The flue gas purification device for dust removal in the foundry workshop, by adding an iron removal mechanism, allows the waste gas from the foundry workshop to first enter the ash hopper and then the pulse jet bag filter. When the waste gas enters the ash hopper, the airflow suddenly diffuses, and the flow velocity abruptly decreases. Larger dust particles fall directly into the ash hopper under gravity. The iron-absorbing blocks adsorb the scrap iron in the airflow, preventing it from entering the pulse jet bag filter, thus greatly reducing the impact on the filter bags. Simultaneously, the ash hopper in the iron removal mechanism not only allows for the initial settling of a larger amount of dust but also lowers the flow velocity of the subsequent airflow into the pulse jet bag filter, reducing impact and wear on the filter bags and thereby improving their service life. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0016] Figure 2 These are schematic diagrams of the structure from different perspectives of embodiments of this application.

[0017] Figure 3 This is an exploded schematic diagram illustrating the iron removal mechanism in the embodiments of this application.

[0018] Explanation of reference numerals in the attached drawings: 1. Pulse jet bag filter; 11. Dust collection chamber; 12. Clean chamber; 13. Ash hopper; 2. Iron removal mechanism; 21. Ash collection hopper; 22. Electric push rod; 23. Top cover; 24. Protective sleeve; 25. Sealing gasket; 26. C-shaped clamp; 3. U-shaped frame; 4. Baffle plate. Detailed Implementation

[0019] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0020] This application discloses a flue gas purification device for dust removal in a foundry workshop, referring to... Figure 1-3 The system includes a pulse jet bag filter 1, with an iron removal mechanism 2 connected to the side of the pulse jet bag filter 1. The iron removal mechanism 2 includes a dust collection hopper 21, an electric push rod 22, and an iron removal assembly installed in the dust collection hopper 21. The iron removal assembly includes a top cover 23 and multiple iron-absorbing blocks arranged side by side at the bottom of the top cover 23. The surface of the iron-absorbing blocks is covered with a protective sleeve 24, and the surface of the protective sleeve 24 is smooth. To facilitate subsequent cleaning, no iron-absorbing blocks are installed near the bottom of the protective sleeve 24 to facilitate scraping. The protective sleeve 24 is fixed to the bottom of the top cover 23, and the iron-absorbing blocks are arranged parallel to the airflow direction. Electric push rods 22 are symmetrically fixed on both sides of the dust collection hopper 21, and the top cover 23 is fixed to the piston rod end of the electric push rod 22. A sealing gasket 25 is provided between the top cover 23 and the dust collection hopper 21, and a C-shaped clamp 26 is also provided between the top cover 23 and the dust collection hopper 21.

[0021] The pulse jet bag filter 1 includes a dust collection chamber 11, a purification chamber 12 located above the dust collection chamber 11, and a dust collection hopper 13 located below the dust collection chamber 11. Several filter bags are evenly arranged in the dust collection chamber 11. Air ducts are installed in the purification chamber 12. Air jet pipes are installed on the air ducts corresponding to the positions of the filter bags. An air manifold is connected to the outside of the air ducts. A pulse valve is connected to the air manifold. An air inlet is opened on the side of the dust collection hopper 13. An air outlet is opened on the side of the purification chamber 12. The side of the dust collection hopper 21 is connected to the air inlet.

[0022] Reference Figure 3 The top cover 23 also has multiple U-shaped frames 3 arranged side by side at the bottom. The protective cover 24 is fixed to the bottom of the U-shaped frame 3. The U-shaped frame 3 also has a spoiler 4 inside, which is set perpendicular to the U-shaped frame 3.

[0023] By setting up the baffle 4, the airflow impacts the baffle 4, which can further reduce the airflow velocity, allowing larger dust particles to fall directly into the dust collection hopper 21 under the action of gravity, and the scrap iron in the airflow is more easily captured by the iron magnet, resulting in a better iron removal effect.

[0024] Reference Figure 2 Both the ash collection hopper 21 and the ash receiving hopper 13 are equipped with waste discharge pipes at the bottom, and valves are installed inside the waste discharge pipes.

[0025] The implementation principle of a flue gas purification device for dust removal in a foundry workshop according to an embodiment of this application is as follows: The waste gas from the foundry first enters the ash collection hopper 21, and then enters the pulse bag filter 1. When the waste gas enters the ash collection hopper 21, the airflow suddenly diffuses and the flow velocity drops sharply. Larger dust particles fall directly into the ash collection hopper 21 under the action of gravity. The iron adsorption block adsorbs the scrap iron in the airflow, preventing it from entering the pulse bag filter 1, which greatly reduces the impact on the filter bags. When the iron removal mechanism 2 needs to be cleaned, the C-shaped clamp 26 is removed, and the electric push rod 22 raises the iron removal component. The staff can use the scraper to scrape the scrap iron filings on the surface of the protective sleeve 24 into the ash collection hopper 21, and finally discharge them together through the waste discharge pipe. The cleaning is relatively simple, maintenance-free, and energy-saving.

[0026] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A flue gas purification device for dust removal in a foundry workshop, comprising a pulse bag filter (1), characterized in that: The pulse bag dust collector (1) is connected to an iron removal mechanism (2). The iron removal mechanism (2) includes a dust collection hopper (21), an electric push rod (22), and an iron removal assembly installed in the dust collection hopper (21). The iron removal assembly includes a top cover (23) and multiple iron-absorbing blocks arranged side by side at the bottom of the top cover (23). The surface of the iron-absorbing blocks is covered with a protective sleeve (24). The protective sleeve (24) is fixed to the bottom of the top cover (23). The iron-absorbing blocks are arranged parallel to the airflow direction. Electric push rods (22) are symmetrically fixed on both sides of the dust collection hopper (21). The top cover (23) is fixed to the piston rod end of the electric push rod (22). A sealing gasket (25) is provided between the top cover (23) and the dust collection hopper (21). A C-shaped clamp (26) is also provided between the top cover (23) and the dust collection hopper (21).

2. The flue gas purification device for dust removal in a foundry workshop according to claim 1, characterized in that: The bottom of the top cover (23) is also provided with multiple U-shaped frames (3) arranged side by side. The protective sleeve (24) is fixed to the bottom of the U-shaped frame (3). The U-shaped frame (3) is also provided with a spoiler (4), which is set perpendicular to the U-shaped frame (3).

3. The flue gas purification device for dust removal in a foundry workshop according to claim 1, characterized in that: The pulse bag filter (1) includes a dust collection chamber (11), a purification chamber (12) located above the dust collection chamber (11), and a dust collection hopper (13) located below the dust collection chamber (11). Several filter bags are evenly arranged in the dust collection chamber (11). Air ducts are arranged in the purification chamber (12). Air jet pipes are installed on the air ducts corresponding to the positions of the filter bags. An air manifold is connected to the outside of the air ducts, and a pulse valve is connected to the air manifold.

4. The flue gas purification device for dust removal in a foundry workshop according to claim 3, characterized in that: The ash hopper (13) has an air inlet on its side, the purification chamber (12) has an air outlet on its side, and the ash collection hopper (21) is connected to the air inlet on its side.

5. The flue gas purification device for dust removal in a foundry workshop according to claim 3, characterized in that: Both the ash collection hopper (21) and the ash receiving hopper (13) are equipped with waste discharge pipes at their bottoms, and valves are installed inside the waste discharge pipes.

6. The flue gas purification device for dust removal in a foundry workshop according to claim 1, characterized in that: The protective sleeve (24) has a smooth surface.

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