A negative pressure bag filter for ferrosilicon submerged arc furnace

Abstract

This utility model discloses a negative pressure bag filter dust collector for a ferrosilicon submerged arc furnace, relating to the technical field of bag filter dust collectors. It includes a shell, with a cover plate fixedly connected to the top of the shell by screws. Multiple vertical rods are provided at the bottom of the cover plate, with a ball at the bottom of each vertical rod. A collar is fitted onto the top of each vertical rod, and a horizontal tube penetrates the side wall of the collar. A dust collector screen plate is provided on the top of the inner side of the shell, and bag cages are fixedly connected to the screen plate through openings. This utility model, through a series of structural features, reduces the probability of dust accumulating inside the dust collector for extended periods, absorbing moisture, and agglomerating. This facilitates subsequent cleaning processes inside the dust collector and avoids directly connecting the bag cages to the micro-vibration equipment, thereby reducing the probability of loosening between the bag cages and the screen plate due to vibration and ensuring a stable connection between them.

Description

Technical Field

[0001] This utility model relates to the technical field of baghouse dust collectors, specifically a negative pressure large baghouse dust collector for ferrosilicon submerged arc furnaces. Background Technology

[0002] During the production of alloys, ferrosilicon submerged arc furnaces generate a large amount of high-temperature fumes. If these fumes are not treated by bag filters, they can easily pollute the environment. Therefore, the fumes generated during the operation of ferrosilicon submerged arc furnaces need to be filtered by bag filters before being released into the atmosphere. There are various types of bag filters, among which negative pressure dust collectors allow the fumes to be quickly drawn into the dust collector rather than being pushed into the dust collector by pressurization, resulting in higher dust removal efficiency.

[0003] However, in existing negative pressure baghouse dust collectors for ferrosilicon submerged arc furnaces, the dust intercepted on the outside of the filter bags falls into the ash hopper at the bottom of the dust collector and remains there for a long time. The dust falling into the ash hopper usually slides down into the conveying pipe due to its own gravity, resulting in a long discharge time. Furthermore, because the inside of the dust collector is prone to condensation due to high temperatures, the dust accumulated in the ash hopper has a high moisture content. If not treated promptly, it easily adheres to the inner wall of the ash hopper, forming difficult-to-clean clumps, making subsequent cleaning of the ash hopper troublesome and time-consuming. In addition, when using pulse cleaning to introduce high-speed airflow in existing baghouse dust collectors, additional micro-vibration equipment is usually required to cause the filter bags to expand and vibrate. This vibration directly acts on the bag cage, which can easily cause loosening between the bag cage and the dust collector screen plate, hindering the stability of the connection between the filter bags and the dust collector screen plate. Utility Model Content

[0004] The purpose of this invention is to provide a negative pressure large bag filter for ferrosilicon submerged arc furnaces to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a negative pressure bag filter for a ferrosilicon submerged arc furnace, comprising an outer shell, a cover plate fixedly connected to the top of the outer shell by screws, multiple vertical rods provided at the bottom of the cover plate, a ball provided at the bottom of the vertical rods, a collar fitted at the top of the vertical rods, a horizontal pipe penetrating the side wall of the collar, a dust collector screen plate provided at the top of the inner side of the outer shell, a bag cage fixedly connected to the dust collector screen plate through an opening, a dust collector bag fitted on the outside of the bag cage, an air inlet pipe penetrating the bottom of the front side of the outer shell, a first electric butterfly valve provided at the end of the air inlet pipe, an air outlet pipe penetrating the top of the back side of the outer shell, a negative pressure fan provided at the end of the air outlet pipe, a connecting pipe penetrating the bottom of one side wall of the outer shell, a negative pressure ash suction pump provided on one side of the connecting pipe, and multiple baffles arranged side by side at the bottom of the inner side of the outer shell.

[0006] Preferably, an air cylinder is provided at the top of one side wall of the outer shell, and a bent pipe passes through the top of the air cylinder, with the top of the bent pipe connected to the end of the horizontal pipe.

[0007] Preferably, a second electric butterfly valve is provided at the junction of the connecting pipe and the outer shell, the connecting pipe is connected to the air inlet of the negative pressure ash suction pump, and the air outlet of the negative pressure ash suction pump is connected to the ash discharge pipe.

[0008] Preferably, the air inlet pipe is connected to the air outlet pipe through the outer shell, and the dust collector screen plate is located at the bottom of the air outlet pipe.

[0009] Preferably, both the vertical rod and the sphere are located inside the dust collector bag.

[0010] Preferably, the collar has an airflow cavity inside, and an air outlet is provided at the bottom end of the airflow cavity. The collar is located directly above the dust collector bag.

[0011] Preferably, the sidewall of the baffle is provided with multiple drainage grooves.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. This ferrosilicon submerged arc furnace negative pressure bag filter dust collector, through the installation of a negative pressure ash suction pump, a first electric butterfly valve, a second electric butterfly valve, and an ash discharge pipe, ensures that the dust falling at the bottom of the dust collector can be promptly sucked into the ash discharge pipe by the negative pressure ash suction pump located at the bottom of the dust collector during the pulse cleaning process. This allows the dust to be discharged from the dust collector in a timely manner, reducing the probability of dust accumulating inside the dust collector for a long time, absorbing moisture, and agglomerating, thus facilitating subsequent cleaning processes inside the dust collector.

[0014] 2. This negative pressure baghouse dust collector for ferrosilicon submerged arc furnace, through the design of a collar, horizontal pipe, vertical rod, and sphere, allows the vertical rod and sphere to swing left and right after being subjected to the pulsed airflow ejected from the air outlet at the bottom of the collar. This allows the sphere to strike the inner side of the dust collector bag, avoiding direct connection between the bag cage and the micro-vibration device. This reduces the probability of loosening between the dust collector bag cage and the dust collector screen plate due to vibration, and makes it easier to maintain a stable connection between the dust collector bag cage and the dust collector screen plate. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the vertical rod and spherical structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the baffle and diversion channel structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the negative pressure ash suction pump and ash discharge pipe of this utility model.

[0019] In the diagram: 1. Cover plate; 2. Outer shell; 3. Air inlet pipe; 4. First electric butterfly valve; 5. Second electric butterfly valve; 6. Connecting pipe; 7. Negative pressure dust suction pump; 8. Dust discharge pipe; 9. Air cylinder; 10. Bend; 11. Air outlet pipe; 12. Negative pressure fan; 13. Dust collector bag; 14. Bag cage; 15. Vertical rod; 16. Sphere; 17. Dust collector screen plate; 18. Collar; 19. Horizontal pipe; 20. Baffle; 21. Drainage channel. Detailed Implementation

[0020] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] like Figures 1 to 4As shown, the negative pressure bag filter dust collector for ferrosilicon submerged arc furnace in this embodiment includes an outer shell 2. The top of the outer shell 2 is fixedly connected to a cover plate 1 by screws. Multiple vertical rods 15 are provided at the bottom of the cover plate 1. A ball 16 is provided at the bottom of the vertical rod 15. A collar 18 is fitted on the top of the vertical rod 15. A horizontal pipe 19 passes through the side wall of the collar 18. A dust collector screen plate 17 is provided on the top of the inner side of the outer shell 2. A bag cage 14 is fixedly connected to the dust collector screen plate 17 through an opening. A dust collector bag 13 is fitted on the outer side of the bag cage 14. An air inlet pipe 3 passes through the bottom of the front side of the outer shell 2. A first electric butterfly valve 4 is provided at the end of the air inlet pipe 3. An air outlet pipe 11 passes through the top of the back side of the outer shell 2. A negative pressure fan 12 is provided at the end of the air outlet pipe 11. A connecting pipe 6 passes through the bottom of one side wall of the outer shell 2. A negative pressure dust suction pump 7 is provided on one side of the connecting pipe 6. Multiple baffles 20 are arranged side by side on the bottom of the inner side of the outer shell 2.

[0024] Specifically, the cover plate 1 facilitates the opening of the top of the dust collector, making it easy to replace the worn sphere 16. The vertical rod 15 is a flexible straight rod with excellent high-temperature resistance, allowing it to swing after being impacted by the pulse airflow. The sphere 16 is also made of a flexible, high-temperature resistant material, preventing irreversible damage to the dust collector bag 13 when struck against its inner wall. The diameter of the collar 18 is much larger than that of the sphere 16, allowing the sphere 16 to pass through it after the cover plate 1 is opened. The interior of the collar 18 is connected to the interior of the horizontal pipe 19, allowing the collar 18 to receive the pulse airflow. The dust collector screen plate 17 divides the interior of the outer shell 2 into two parts, thereby achieving the function of filtering smoke. The filter separates the dust in the air. The function of the air inlet pipe 3 is to allow the flue gas in the furnace to smoothly enter the interior of the outer shell 2. The function of the first electric butterfly valve 4 is to facilitate the control of the air inlet pipe 3. The function of the air outlet pipe 11 is to discharge the filtered flue gas from the dust collector. The function of the negative pressure fan 12 is to generate negative pressure at the air inlet pipe 3, thereby accelerating the speed at which the flue gas enters the interior of the dust collector. The function of the negative pressure ash suction pump 7 is to suck the dust out from the bottom of the inner side of the dust collector in a timely manner, reducing the probability of dust accumulating at the bottom of the inner side of the dust collector for a long time and agglomerating, thus making it easier to clean the dust collector later. The function of the baffle 20 is to block the flue gas entering through the air inlet pipe 3, thereby promoting the flue gas to enter the interior of the outer shell 2 in a more dispersed manner.

[0025] Furthermore, an air cylinder 9 is provided on the top of one side wall of the outer casing 2. A bent pipe 10 passes through the top of the air cylinder 9. The top of the bent pipe 10 is connected to the end of the horizontal pipe 19. The air cylinder 9 is used to connect the pulse airflow, thereby enabling the pulse airflow to enter the bent pipe 10 and the connecting pipe 6.

[0026] Furthermore, a second electric butterfly valve 5 is provided at the junction of the connecting pipe 6 and the outer casing 2. The connecting pipe 6 is connected to the air inlet of the negative pressure ash suction pump 7, and the air outlet of the negative pressure ash suction pump 7 is connected to the ash discharge pipe 8. The function of the second electric butterfly valve 5 is to seal the connecting pipe 6, thereby ensuring that the flue gas can be discharged from the air outlet pipe 11 after filtration.

[0027] Furthermore, the inlet pipe 3 is connected to the outlet pipe 11 through the outer shell 2, and the dust collector screen plate 17 is located at the bottom of the outlet pipe 11, so that the flue gas enters the space where the outlet pipe 11 is located after being filtered by the dust collector bag 13, thereby achieving the filtration of the flue gas.

[0028] Furthermore, both the vertical rod 15 and the ball 16 are located inside the dust collector bag 13, so that the vertical rod 15 can vibrate after being impacted by the pulse airflow, thereby causing the ball 16 at the bottom of the vertical rod 15 to swing, thus realizing the knocking on the inside of the dust collector bag 13.

[0029] Furthermore, the collar 18 has an airflow chamber inside, and an air outlet is provided at the bottom of the airflow chamber. The collar 18 is located directly above the dust collector bag 13. The function of the collar 18 is to allow the pulse airflow to pass directly to the inside of the dust collector bag 13, thereby achieving the cleaning of the dust collector bag 13.

[0030] Furthermore, the side wall of the baffle 20 is provided with multiple flow channels 21. The function of the flow channels 21 is to disperse the airflow entering from the air inlet pipe 3, and at the same time, to divide the bottom of the dust collector into multiple spaces, reducing the probability of dust forming large lumps at the bottom of the dust collector, thus making it easier for the subsequent cleaning process of the dust collector.

[0031] The usage method of this embodiment is as follows: When using this ferrosilicon submerged arc furnace negative pressure large bag dust collector, first connect the bag dust collector to an external power source, then connect the corresponding pipes, then start the negative pressure fan 12 and open the first electric butterfly valve 4, so that the flue gas in the furnace is initially cooled and then sucked into the outer shell 2 through the air inlet pipe 3. Then, the flue gas blown out from the air inlet pipe 3 will collide with the baffle 20 and disperse, then pass through the dust collector bag 13 and enter the top of the outer shell 2, and then be discharged from the outer shell 2 through the air outlet pipe 11. After the dust removal of the flue gas is completed, close the first electric butterfly valve 4, so that the air inlet pipe 3 is closed, and then the flue gas passes through the air cylinder 9 and the bend pipe. Pulsed airflow is introduced into the horizontal pipe 19 and the collar 18, causing the pulsed airflow to blow from the air outlet at the bottom of the collar 18 towards the inside of the dust collector bag 13, and blowing the vertical rod 15. This causes the vertical rod 15 to drive the ball 16 to swing inside the dust collector bag 13 and knock on the dust collector bag 13, causing the dust adsorbed on the surface of the dust collector bag 13 to fall to the bottom of the inner side of the outer shell 2. At the same time, the second electric butterfly valve 5 and the negative pressure dust suction pump 7 can be opened, so that the dust detached from the dust collector bag 13 can be sucked into the dust discharge pipe 8 in time by the negative pressure dust suction pump 7, so that the dust in the dust collector can be cleaned in time and the accumulation of dust in the dust collector can be reduced.

[0032] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A large bag dust collector with negative pressure for ferrosilicon heat furnace, comprising a shell (2), characterized in that: The top of the outer shell (2) is fixedly connected to a cover plate (1) by screws. The bottom of the cover plate (1) is provided with multiple vertical rods (15). The bottom of each vertical rod (15) is provided with a ball (16). The top of each vertical rod (15) is fitted with a collar (18). A horizontal tube (19) passes through the side wall of the collar (18). The top of the inner side of the outer shell (2) is provided with a dust collector screen plate (17). The dust collector screen plate (17) is fixedly connected to a bag cage (14) through an opening. The outer side of the bag cage (14) is... A dust collector bag (13) is fitted on the shell (2). An air inlet pipe (3) is passed through the bottom of the front side of the shell (2). A first electric butterfly valve (4) is provided at the end of the air inlet pipe (3). An air outlet pipe (11) is passed through the top of the back side of the shell (2). A negative pressure fan (12) is provided at the end of the air outlet pipe (11). A connecting pipe (6) is passed through the bottom of one side wall of the shell (2). A negative pressure dust suction pump (7) is provided on one side of the connecting pipe (6). Multiple baffles (20) are arranged side by side at the bottom of the inner side of the shell (2).

2. The large bag dust collector under negative pressure for ferrosilicon smelting furnace according to claim 1, characterized in that: An air cylinder (9) is provided on the top of one side wall of the outer shell (2), and a bent pipe (10) passes through the top of the air cylinder (9). The top of the bent pipe (10) is connected to the end of the horizontal pipe (19).

3. The negative pressure large bag filter dust collector for a ferrosilicon submerged arc furnace according to claim 1, characterized in that: A second electric butterfly valve (5) is provided at the junction of the connecting pipe (6) and the outer shell (2). The connecting pipe (6) is connected to the air inlet of the negative pressure ash suction pump (7), and the air outlet of the negative pressure ash suction pump (7) is connected to the ash discharge pipe (8).

4. The negative pressure bag filter for a ferrosilicon submerged arc furnace according to claim 1, characterized in that: The air inlet pipe (3) is connected to the air outlet pipe (11) through the outer shell (2), and the dust collector screen plate (17) is located at the bottom of the air outlet pipe (11).

5. The negative pressure bag filter for a ferrosilicon submerged arc furnace according to claim 1, characterized in that: The vertical rod (15) and the sphere (16) are both located inside the dust collector bag (13).

6. The negative pressure bag filter for a ferrosilicon submerged arc furnace according to claim 1, characterized in that: The collar (18) has an airflow cavity inside, and an air outlet is provided at the bottom end of the airflow cavity. The collar (18) is located directly above the dust collector bag (13).

7. The negative pressure large bag filter dust collector for a ferrosilicon submerged arc furnace according to claim 1, characterized in that: The side wall of the baffle (20) is provided with multiple drainage grooves (21).

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