Double-layer filtering dust removal device

Abstract

The utility model relates to the technical field of dust removers, and discloses a double-layer filtering dust removal device which comprises a shell, a dust removal chamber and an air purification chamber are arranged in the shell in a left-right separated mode, an air inlet is formed in the side wall of the dust removal chamber, and an upper-layer filtering chamber and a lower-layer filtering chamber are distributed in the dust removal chamber in an up-down through mode. The upper-layer filter chamber is defined by a plurality of upper-layer filter elements, the lower-layer filter chamber is defined by a lower-layer filter element, air inlets of the upper-layer filter chamber and the lower-layer filter chamber are communicated with the air inlet, and an air outlet of the upper-layer filter chamber is formed in the top end and is communicated with the top end of the air purification chamber; an air outlet of the lower-layer filtering chamber is formed in the side face and communicated with the side face of the air purifying chamber, the bottom end of the lower-layer filtering chamber is communicated with an ash discharging device, and an air outlet of the air purifying chamber is connected with a fan. The whole device is simple and compact in structure, small in occupied area, low in energy consumption, low in cost, reasonable in airflow distribution, low in noise and suitable for being arranged near a dust removal point in an intermittent production process.

Description

Technical Field

[0001] This utility model relates to the field of dust collector technology, and more specifically, to a double-layer filtration dust removal device. Background Technology

[0002] The national requirements for ultra-low emissions and energy conservation and emission reduction are becoming increasingly prominent. However, the footprint, air volume, energy consumption and scale of dust removal devices that match industrial processes and production are constantly expanding and becoming more complex. As dust emission standards become more stringent, the investment and operation and maintenance costs of dust removal devices are also increasing.

[0003] Currently, the most commonly used dust removal systems in industry are centralized dust removal systems. For example, in steelmaking and ironmaking, the material supply process involves decentralized storage, decentralized screening, decentralized weighing, and intermittent feeding. However, the dust removal system uses a centralized, large-scale dust removal system for unified treatment and dust emission reduction. Similarly, in the steelmaking smelting process, the operation from charging to smelting is basically intermittent and segmented, but the dust removal system also involves laying dust ducts outside the plant and using a centralized, large-scale dust removal system for unified treatment and dust emission reduction. This type of centralized dust removal system not only involves large investment, long pipelines, high energy consumption, large footprint, high noise, and high operation and maintenance costs, but also the dust removal operation process is not compatible with the production process. The fan design air volume is too large, resulting in serious energy waste and a significant increase in total dust emissions. Moreover, it must operate 24 / 7, which undoubtedly brings a huge energy burden to enterprises. Although some systems are equipped with frequency converters in an attempt to reduce energy consumption, due to the size and complexity of the systems themselves, it is difficult to achieve a balance between low-frequency operation and pipeline airflow. In actual production, they are always in a state of high-speed full-load operation. In order to ensure the dust removal effect, high energy consumption is the only option. This kind of dust removal system that is not compatible with the production process is extremely incompatible with the national policies of "new quality productivity" and "energy conservation, emission reduction and carbon reduction" and needs to be improved. Utility Model Content

[0004] The technical problem to be solved by this utility model is that existing industrial dust removal systems are mainly centralized dust removal systems, which are complex in structure, consume a lot of energy, and have high engineering investment and operation and maintenance costs. In order to overcome the above-mentioned defects of the prior art, this utility model provides a double-layer filtration dust removal device. The device has a simple and compact structure, small footprint, low noise, low energy consumption, and low cost. It is suitable for use near the dust removal point in intermittent production processes.

[0005] This utility model provides a double-layer filtration dust removal device: it includes an outer shell, and a dust removal chamber and a clean air chamber are respectively arranged on the left and right sides of the outer shell. An air inlet is provided on the side wall of the dust removal chamber. The dust removal chamber includes an upper filter chamber and a lower filter chamber that are distributed vertically. The upper filter chamber is surrounded by multiple upper filter elements, and the lower filter chamber is surrounded by lower filter elements. The air inlets of the upper filter chamber and the lower filter chamber are connected to the air inlet. The air outlet of the upper filter chamber is located at the top and is connected to the top of the clean air chamber. The air outlet of the lower filter chamber is located on the side and is connected to the side of the clean air chamber. The bottom of the lower filter chamber is connected to a dust discharge device, and the air outlet of the clean air chamber is connected to a fan.

[0006] Compared with the prior art, this application has the following advantages: the filter chamber, clean air chamber and dust collection chamber are coupled in one shell, which greatly reduces the overall footprint of the dust removal device; the dust-laden gas enters the shell through the air inlet and runs in a fully enclosed space, and the filtered clean air is discharged from the fan outlet, which can effectively reduce dust escape; the dust collected in the dust collection chamber after filtration and blowing is discharged from the ash outlet by the ash removal device. The airflow distribution of the entire device is reasonable. Since there is only one fan after integration, the operating noise is low, the energy consumption is low, and the cost is low; it is particularly suitable for use in intermittent production processes near the dust removal point.

[0007] In one possible implementation, the upper filter elements are arranged vertically side by side, and the top of the upper filter chamber is provided with an upper perforated plate with air outlets. The upper filter elements are installed on the upper perforated plate and the air outlets of the upper filter elements are aligned with the air outlets of the upper perforated plate. The upper perforated plate extends into the clean air chamber and forms an upper clean air chamber with the top of the outer shell. The upper clean air chamber is connected to the clean air chamber through the air outlets of the upper perforated plate.

[0008] In one possible implementation, the upper air purification chamber is provided with an upper air blowing device consisting of a solenoid valve, a blowing pipeline, an airflow distributor and a nozzle, facing the air outlet of the upper tube sheet.

[0009] In the above scheme, the nozzle is used to blow high-pressure gas into the filter element. The airflow distributor inside the filter element makes the high-pressure backflush airflow evenly distributed inside the filter element. This not only disperses the airflow and reduces noise, but also reduces the impact of the high-pressure backflush gas on the dust collector filter element, improves the filter element life, and also improves the dust removal effect of the dust collector filter bag.

[0010] In one possible implementation, the lower filter elements are arranged in a horizontal stack, and a lower perforated plate with air outlets is provided between the lower filter chamber and the clean air chamber. The lower filter elements are installed on the lower perforated plate and the air outlets of the lower filter elements are aligned with the air outlets of the lower perforated plate. The lower perforated plate and the side wall of the outer shell form a lower clean air chamber, and the lower clean air chamber is connected to the upper clean air chamber through an upper clean air channel.

[0011] In one possible implementation, the lower air purification chamber is provided with a lower air blowing device consisting of a solenoid valve, a blowing pipeline, an airflow distributor and a nozzle, facing the air outlet of the lower perforated plate.

[0012] In the above scheme, the nozzle is used to blow high-pressure gas into the filter element. The airflow distributor inside the filter element makes the high-pressure backflush airflow evenly distributed inside the filter element. This not only disperses the airflow and reduces noise, but also reduces the impact of the high-pressure backflush gas on the dust collector filter element, improves the filter element life, and also improves the dust removal effect of the dust collector filter bag.

[0013] In one possible implementation, the air inlet is located in the middle of the side wall of the dust removal chamber, the upper filter chamber and the lower filter chamber are located on both sides of the air inlet, an upper airflow guide plate is provided between the air inlet and the upper filter chamber, and a lower airflow guide plate is provided between the air inlet and the lower filter chamber.

[0014] In the above scheme, the dual-layer filtration design couples the airflow distribution chamber, upper filtration chamber, lower filtration chamber, upper clean air chamber, lower clean air chamber, dust collection chamber, and clean air duct into a single shell, ensuring thorough filtration.

[0015] In one possible implementation, the air inlet is located at the bottom of the side wall of the dust removal chamber, and the upper and lower filter chambers are both located above the air inlet. An upper airflow guide plate is provided between the upper and lower filter chambers, and a lower airflow guide plate is provided between the air inlet and the lower filter chamber.

[0016] In the above scheme, upper and lower airflow guide plates are set along the airflow distribution path. These can be adjusted according to the characteristics of the flue gas to keep the filtration resistance of the upper and lower layers basically consistent. The airflow distribution plates play a role in airflow distribution, guiding dust to fall, adjusting the resistance of the upper and lower filtration chambers, reducing the scouring and wear of the filter element by large dust particles, and also effectively reducing the phenomenon of dust backflow and "secondary adsorption" during the blowing process.

[0017] In one possible implementation, the bottom of the housing is provided with a support leg, and a control cabinet is provided in the space below the support leg. The control cabinet is electrically connected to the ash discharge device, the fan, the upper jet blowing device, and the lower jet blowing device.

[0018] In the above scheme, setting up a control cabinet allows for centralized control of the electric equipment within the device, facilitating the operation of the dust removal device as needed.

[0019] In one possible implementation, an equipment platform is located below the outer casing, the ash discharge device is mounted on the equipment platform, sound insulation panels are provided around the equipment platform, the outer casing has a sound-absorbing material lining, shock-absorbing pads are provided at the connection between the ash discharge device and the equipment platform, and shock-absorbing pads are also provided at the bottom of the support legs and the bottom of the fan. The use of shock-absorbing pads, sound insulation panels, and a sound-absorbing material lining can reduce the noise generated during the operation of the dust removal device.

[0020] In one possible implementation, the dual-layer filtration dust removal device includes two sets of dust removal chambers, each comprising an upper and lower filtration chamber, symmetrically arranged on the left and right sides, and a clean air chamber disposed between the two sets of dust removal chambers. The upper tube sheet of the two sets of dust removal chambers is transitionally connected and surrounds the top of the outer shell to form the upper clean air chamber. The lower clean air chamber includes a lower left clean air chamber and a lower right clean air chamber separated on the left and right sides. The upper ends of the lower left and lower right clean air chambers merge to form an upper clean air channel. The upper end of the upper clean air channel is connected to the air outlet of the upper clean air chamber. The lower ends of the lower left and lower right clean air chambers merge and are connected to a fan.

[0021] In the above solution, the integrated double-layer filtration dust removal device assembled with dual dust removal chambers is a complete module. These modules can be connected in parallel according to air volume. After the outlet pipes of the parallel fans are connected, the air is discharged through the outlet, completing the purification and filtration of large volumes of smoke and dust. Multiple sets of the integrated double-layer filtration dust removal device, as a complete module, connected in parallel, can solve the single-point large-volume purification and filtration needs in steelmaking plants, for example.

[0022] In summary, compared with the prior art, this utility model has the following beneficial effects:

[0023] 1. The dust removal device of this utility model adopts an integrated double-layer filter structure design, which can save a lot of space. Unlike existing large-scale centralized dust removal equipment, it does not require the special opening of dust supply and air supply areas, pipeline areas, dust removal areas, fan motor areas, emission areas, noise reduction and control, etc. Therefore, it can be arranged near the dust collection point and equipment working area in the factory, which can maximize the reduction of the footprint and reduce energy consumption.

[0024] 2. The dust removal device of this utility model adopts an integrated double-layer filter structure design, which reasonably solves the problem of limited filter cartridge height and further reduces the footprint, thereby increasing the filtration area and reducing the filtration velocity in a smaller overall layout area.

[0025] 3. The dust removal device of this utility model adopts multiple noise reduction technologies, such as setting the shell with sound-absorbing material lining, setting the grille sound-absorbing plate around the dynamic equipment, setting the installation part of the dynamic equipment with rubber pads, setting the airflow distributor in the filter element, and using a low-noise fan, which greatly reduces the generation of noise and blocks most of the noise inside the device, reducing the noise impact on the environment. It is suitable for installation in factories and dust removal systems close to pollution points.

[0026] 4. The integrated dust removal device of this utility model can be disassembled and transported separately, which is convenient for installation and reduces transportation and on-site assembly costs. The dust removal device can treat dust near the dust pollution point, which helps to reduce the resistance of pipelines and equipment. It is suitable for intermittent production processes, distributed dust removal systems, and decentralized dust removal systems.

[0027] 5. The integrated double-layer filtration dust removal device of this utility model is a single complete module, which can be connected in parallel according to the air volume and the position of the module in the overall diagram to complete the purification and filtration of large air volume of smoke and dust.

[0028] 6. The airflow distribution plate of the integrated double-layer filter dust removal device of this utility model plays a role in airflow distribution, dust blowing and guiding, resistance adjustment of the upper and lower filter chambers, and reducing the scouring and wear of large dust particles on the filter element. It can effectively reduce the phenomenon of dust flowing back upward and "secondary adsorption" during the blowing process.

[0029] 7. This utility model's integrated double-layer filtration dust removal device is equipped with two filtration chambers and a purification chamber. It can coordinate with production processes according to intermittent production requirements, and intelligently and precisely adjust the frequency of the fan to match the dust and smoke operation as needed. It can intelligently control the fan's start-up, shutdown, high frequency, low frequency, standby, and sleep modes, thereby saving energy and reducing emissions. At the same time, it can also make the upper and lower layers operate alternately according to process requirements, so that the resistance of the filter element is always kept in a reasonable or low resistance state, which helps to reduce energy consumption and extend the filter element's life. Attached Figure Description

[0030] Figure 1 This is a structural diagram of the dual-layer filtration dust removal device in Example 1;

[0031] Figure 2 This is a structural diagram of the dual-layer filtration dust removal device in Example 2;

[0032] Figure 3 This is a structural diagram of the dual-layer filtration dust removal device in Example 3.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Outer shell; 2. Support legs; 3. Air inlet; 4. Upper airflow guide plate; 5. Upper filter chamber; 6. Upper filter element; 7. Upper clean air chamber; 8. Upper jet cleaning device; 9. Upper clean air passage; 10. Lower airflow guide plate; 11. Lower filter chamber; 12. Lower filter element; 13. Lower clean air chamber; 14. Lower jet cleaning device; 15. Control cabinet; 16. Lower clean air passage; 17. Fan; 18. Air outlet; 19. Dust collection chamber; 20. Ash removal device; 21. Ash outlet; 22. Airflow distribution chamber; 23. Upper tube sheet; 24. Lower tube sheet. Detailed Implementation

[0035] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, specific embodiments of this utility model are described in detail below. It should be noted that the following embodiments are only used to illustrate the implementation methods and typical parameters of this utility model, and are not intended to limit the parameter range described in this utility model. Reasonable variations derived therefrom are still within the protection scope of the claims of this utility model.

[0036] In the description of this utility model, it should be noted that the terms "left", "right", "inner", "outer", "front", "rear", "head", "tail", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are 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.

[0037] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0038] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments. Example 1

[0039] See Figure 1As shown, this embodiment provides a dual-layer filtration dust removal device, including a housing 1 and support legs 2 disposed at the bottom of the housing 1. The housing 1 is divided into a dust removal chamber and a clean air chamber on the left and right sides, respectively. The dust removal chamber includes an upper filter chamber 5 surrounded by an upper filter element 6, a lower filter chamber 11 surrounded by a lower filter element 12, an airflow distribution chamber 22, a dust collection chamber 19, and a dust discharge device 20, etc. The clean air chamber includes an upper clean air chamber 7 and an upper clean air channel 9, a lower clean air chamber 13 and a lower clean air channel 16, etc. An air inlet 3 is also provided on the side wall of the housing 1. The space directly opposite the air inlet 3 is the airflow distribution chamber 22. An upper airflow guide plate 4 is disposed between the air inlet 3 and the upper filter chamber 5, and a lower airflow guide plate 10 is disposed between the air inlet 3 and the lower filter chamber 11. The bottom of the lower filter chamber 11 is connected to the ash discharge device 20, the air outlet of the upper filter chamber 5 is connected to the upper clean air chamber 7, and the air outlet of the lower clean air chamber 13 is connected to the fan 17.

[0040] Specifically, the upper filter elements 6 are arranged vertically side by side to form an upper filter chamber 5. The top of the upper filter chamber 5 is provided with an upper perforated plate 23 with an air outlet (not shown in the figure). The upper filter elements 6 are installed on the upper perforated plate 23, and the air outlet of the upper filter elements 6 is aligned with the air outlet of the upper perforated plate 23. The upper perforated plate 23 extends into the clean air chamber and forms an upper clean air chamber 7 with the top of the outer shell. The upper clean air chamber 7 is connected to the clean air chamber through the air outlet of the upper perforated plate 23. The upper clean air chamber 7 is provided with an upper blowing device 8, which includes a solenoid valve, a blowing pipeline, an airflow distributor and a nozzle, facing the air outlet of the upper perforated plate 23. The lower filter element 12 is arranged in a horizontal stack to form a lower filter chamber 11. A lower tube sheet 24 with an air outlet (not shown in the figure) is provided on the side of the lower filter chamber 11 near the clean air chamber. The lower filter element 12 is installed on the lower tube sheet 24, and the air outlet of the lower filter element 12 is aligned with the air outlet of the lower tube sheet 24. The lower tube sheet 24 and the side wall of the outer shell 1 form a lower clean air chamber 13. The lower clean air chamber 13 is connected to the upper clean air chamber 7 through the air outlet of the upper tube sheet 23. A lower blowing device 14, consisting of a solenoid valve, a blowing pipeline, an airflow distributor and a nozzle, is provided in the lower clean air chamber 13 facing the air outlet of the lower tube sheet 24. The solenoid valve, the blowing pipeline, the airflow distributor and the nozzle are connected and assembled in accordance with the common connection method in the prior art to form the upper blowing device 8 and the lower spraying device 14. The blowing device includes a solenoid valve, a blowing pipeline and a nozzle, and an airflow distributor is provided in the filter element. The nozzle is connected to the airflow distributor and is used to blow the air outlet of the filter element to blow the dust adhering to the filter element, so that the dust falls into the dust collection chamber 19.

[0041] The bottom of the outer casing 1 is equipped with multiple support feet 2, providing installation space below the casing 1. The ash removal device 20, fan 17, and control cabinet 15 are housed within this space, resulting in a small overall footprint. This allows for installation close to dust sources, reducing pipe and equipment resistance. It is suitable for intermittent production processes, distributed dust collection systems, and decentralized dust collection systems, and is ideal for installation within factory buildings near pollution points. The components can be disassembled for easy transport and installation, resulting in lower transportation and on-site assembly costs.

[0042] In this embodiment, the air inlet 3 is located in the middle of the side wall of the dust removal chamber. The upper filter chamber 5 and the lower filter chamber 11 are respectively located on both sides of the air inlet 3. The upper airflow guide plate 4 is located between the air inlet 3 and the upper filter chamber 5, and the lower airflow guide plate 10 is located between the air inlet 3 and the lower filter chamber 11. The upper airflow guide plate 4 and the lower airflow guide plate 10 form the airflow distribution chamber 22.

[0043] In this embodiment, an equipment platform is provided below the outer shell 1, and the ash discharge device 20 is installed on the equipment platform. Sound insulation boards are provided around the equipment platform, and the outer shell 1 has a sound-absorbing material lining. The connection between the ash discharge device 20 and the equipment platform is provided with shock-absorbing pads. The bottom of the support leg 2 and the bottom of the fan 17 are also provided with shock-absorbing pads. The installation of shock-absorbing pads, sound insulation boards, and sound-absorbing material lining can reduce the noise generated by the dust removal device during operation, play a role in vibration and noise reduction, and reduce noise pollution to the environment.

[0044] The working process of the integrated dual-layer filtration dust removal device in this embodiment is as follows: Dust-laden gas enters the airflow distribution chamber 22 of the integrated dual-layer filtration dust removal device from the middle air inlet 3 of the outer shell 1, and is automatically divided into upward airflow and downward airflow. The upward airflow enters the upper filtration chamber 5 through the upper airflow guide plate 4. After being filtered and purified by the upper filter element 6, the dust-laden gas enters the upper clean air chamber 7. The purified gas then enters the lower clean air chamber 13 after passing through the upper clean air channel 9. The downward airflow enters the lower filtration chamber 13 through the lower airflow guide plate 10. In chamber 11, dust-laden gas is filtered and purified by the lower filter element 12 before entering the lower clean air chamber 13. The purified gas in the lower clean air chamber 13 mixes with the gas entering from the upper clean air channel 9 and then enters the lower clean air channel 16. The gas in the lower clean air channel 16 is drawn out by the fan 17 and discharged through the air outlet 18. The upper airflow guide plate 4 and the lower airflow guide plate 10 can be automatically or manually adjusted according to the pressure difference between the upper and lower layers to make the pressure difference between the upper filter chamber 5 and the lower filter chamber 11 tend to be consistent. After a period of operation, the pressure difference between the upper filter chamber 5 and the lower filter chamber 11 increases. During intermittent periods, the control system in the control cabinet 15 automatically starts the upper blowing device 8 and the lower blowing device 14 to blow the dust adhering to the filter element, causing the dust to fall off and enter the dust collection chamber 19. The blowing device includes a solenoid valve, a blowing pipeline, and a nozzle. An airflow distributor is installed inside the filter element. The nozzle is connected to the airflow distributor. The solenoid valve is used to control the operation of the upper blowing device 8 and the lower blowing device 14. When the solenoid valve opens, high-pressure gas enters the nozzle through the blowing pipeline. The nozzle blows the high-pressure gas into the airflow distributor, making the high-pressure blowing airflow evenly distributed inside the filter element. The airflow distributor not only disperses the airflow and reduces noise, but also reduces the impact of high-pressure back-blowing gas on the dust collector filter element, improves the filter element life, and also improves the dust removal effect of the dust collector filter bag. Preferably, during intermittent backflushing, the upper jet cleaning device 8 is started first, and the lower jet cleaning device 14 is started after a delay or after completion, to improve the system's cleaning effect and reduce the "secondary" adsorption of the lower filter element 12. When the dust in the dust collection chamber 19 reaches the set height, the ash discharge device 20 is automatically started to discharge the dust through the ash discharge port 21. Example 2

[0045] See Figure 2 This embodiment discloses a double-layer filtration dust removal device. The difference from Embodiment 1 is that the air inlet 3 is located at the bottom of the side wall of the dust removal chamber, the upper filter chamber 5 and the lower filter chamber 11 are both located above the air inlet 3, the upper airflow guide plate 4 is located between the upper filter chamber 5 and the lower filter chamber 11, and the lower airflow guide plate 10 is located between the air inlet 3 and the lower filter chamber 11.

[0046] The dust-laden gas entering through the air inlet 3 enters from the dust collection chamber 19, passes through the lower airflow guide plate 10, and enters the lower filter chamber 11. A portion of the airflow then passes through the upper airflow guide plate 4 and enters the upper filter chamber 5. After being filtered and purified by the upper filter element 6, the dust-laden gas enters the upper clean air chamber 7. The purified gas then passes through the upper clean air channel 9 and enters the lower clean air chamber 13. Another portion of the dust-laden gas, after being filtered and purified by the lower filter element 12, directly enters the lower clean air chamber 13. The purified gas in the lower clean air chamber 13 is then mixed with... After the gas from the upper clean air channel 9 is mixed, it enters the lower clean air duct 16 through the lower clean air chamber 13. The gas in the lower clean air duct 16 is drawn out by the fan 17 and discharged through the air outlet 18. The upper airflow guide plate 4 and the lower airflow guide plate 10 can be automatically or manually adjusted according to the pressure difference between the upper and lower layers to make the pressure difference between the upper filter chamber 5 and the lower filter chamber 11 more consistent. During operation, the pressure difference between the upper filter chamber 5 and the lower filter chamber 11 can also be adjusted according to the blowing pressure to keep them dynamically balanced. Other working procedures are similar to the working process of air intake from the intermediate airflow distribution chamber 22.

[0047] In this embodiment, the integrated dual-layer filtration dust removal device constitutes a complete dust removal module. After entering the outer shell 1 from the dust-laden gas inlet 3, it operates in a fully enclosed space. After being purified by the upper and lower filtration devices, it is discharged from the outlet 18. The collected dust is discharged through the ash removal device 20 and the ash outlet 21. Filtration and purification can reduce dust escape. The airflow distribution chamber 22, the filtration chamber, and the clean air chamber cooperate with each other to achieve efficient dust removal. Example 3

[0048] See Figure 3 This embodiment discloses a double-layer filtration dust removal device. The difference from Embodiment 1 is that the device is composed of multiple parallel modules according to the dust removal air volume. That is, it includes two sets of dust removal chambers symmetrically arranged on the left and right and a clean air chamber disposed between the two sets of dust removal chambers. The upper tube sheet 23 of the two sets of dust removal chambers is transitionally connected and surrounds the top of the outer shell 1 to form an upper clean air chamber 7. The lower clean air chamber 13 includes a lower left clean air chamber and a lower right clean air chamber separated on the left and right. The upper ends of the lower left clean air chamber and the lower right clean air chamber merge to form an upper clean air channel 9. The upper end of the upper clean air channel 9 is connected to the air outlet of the upper clean air chamber. The lower end of the upper clean air channel 9 branches off and connects to the upper ends of the lower left clean air chamber and the lower right clean air chamber respectively. The lower ends of the lower left clean air chamber and the lower right clean air chamber merge to form a lower clean air channel 16 connected to the fan 17. After parallel connection, the outlet pipe of the fan 17 is connected, and then discharged through the air outlet 18 to complete the purification and filtration of large volume of smoke and dust. Its working process is similar to the working process of air intake from the intermediate airflow distribution chamber 22 or the dust collection chamber 19, which can systematically solve the single-point large volume purification and filtration needs in steelmaking plants.

[0049] Of course, the upper clean air channel 9 and the lower clean air channel 16 can also be disconnected, with each channel equipped with a separate fan. The outlet pipes of the two fans are connected to the upper clean air channel 9 and the lower clean air channel 16, respectively, and then discharged through the air outlet 18. The arrangement of the two fans is based on the overall layout, allowing the upper and lower filtration devices to operate independently, which is more conducive to airflow distribution and adjustment of the resistance of the upper and lower filter chambers. Its working process is similar to that of air intake from the intermediate airflow distribution chamber 22 or the dust collection chamber 19.

[0050] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A dual-layer filtration dust removal device, comprising a housing (1), characterized in that, The outer casing (1) is divided into a dust removal chamber and a clean air chamber on the left and right sides respectively. The dust removal chamber has an air inlet (3) on its side wall. The dust removal chamber includes an upper filter chamber (5) and a lower filter chamber (11) that are distributed vertically. The upper filter chamber is surrounded by multiple upper filter elements (6), and the lower filter chamber (11) is surrounded by lower filter elements (12). The air inlets of the upper filter chamber (5) and the lower filter chamber (11) are connected to the air inlet (3). The air outlet of the upper filter chamber (5) is located at the top and is connected to the top of the clean air chamber. The air outlet of the lower filter chamber (11) is located on the side and is connected to the side of the clean air chamber. The bottom of the lower filter chamber (11) is connected to the ash removal device (20). The air outlet of the clean air chamber is connected to the fan (17).

2. The dual-layer filtration dust removal device according to claim 1, characterized in that, The upper filter element (6) is arranged vertically side by side. The top of the upper filter chamber (5) is provided with an upper tube plate (23) with an air outlet. The upper filter element (6) is installed on the upper tube plate (23) and the air outlet of the upper filter element (6) is aligned with the air outlet of the upper tube plate (23). The upper tube plate (23) extends into the clean air chamber and forms an upper clean air chamber (7) with the top of the outer shell. The upper clean air chamber (7) is connected to the clean air chamber through the air outlet of the upper tube plate (23).

3. The dual-layer filtration dust removal device according to claim 2, characterized in that, The upper air purification chamber (7) is equipped with an upper air blowing device (8) consisting of a solenoid valve, a blowing pipeline, an airflow distributor and a nozzle, which is located opposite the air outlet of the upper tube sheet (23).

4. The dual-layer filtration dust removal device according to claim 2, characterized in that, The lower filter element (12) is arranged in a horizontal stack. The lower filter chamber (11) and the clean air chamber are connected by a lower tube sheet (24) with an air outlet. The lower filter element (12) is installed on the lower tube sheet (24) and the air outlet of the lower filter element (12) is aligned with the air outlet of the lower tube sheet (24). The lower tube sheet (24) and the side wall of the outer shell form a lower clean air chamber (13). The lower clean air chamber (13) is connected to the upper clean air chamber (7) through the upper clean air channel (9).

5. A dual-layer filtration dust removal device according to claim 4, characterized in that, The lower air chamber (13) is equipped with a lower air blowing device (14) consisting of a solenoid valve, a blowing pipeline, an airflow distributor and a nozzle, which is located opposite the air outlet of the lower tube sheet (24).

6. A dual-layer filtration dust removal device according to claim 2, characterized in that, The air inlet (3) is located in the middle of the side wall of the dust removal chamber. The upper filter chamber (5) and the lower filter chamber (11) are located on both sides of the air inlet (3). An upper airflow guide plate (4) is provided between the air inlet (3) and the upper filter chamber (5), and a lower airflow guide plate (10) is provided between the air inlet (3) and the lower filter chamber (11).

7. A dual-layer filtration dust removal device according to claim 2, characterized in that, The air inlet (3) is located at the bottom of the side wall of the dust removal chamber. The upper filter chamber (5) and the lower filter chamber (11) are both located above the air inlet (3). An upper airflow guide plate (4) is provided between the upper filter chamber (5) and the lower filter chamber (11), and a lower airflow guide plate (10) is provided between the air inlet (3) and the lower filter chamber (11).

8. A dual-layer filtration dust removal device according to claim 3, characterized in that, The bottom of the outer shell (1) is provided with a support leg (2), and a control cabinet (15) is provided in the space below the support leg (2). The control cabinet (15) is electrically connected to the ash discharge device (20), the fan (17), and the upper jet blowing device (8).

9. A dual-layer filtration dust removal device according to claim 8, characterized in that, The outer shell (1) is provided with an equipment platform below it. The ash discharge device (20) is installed on the equipment platform. The equipment platform is surrounded by sound insulation boards. The outer shell (1) has a sound-absorbing material lining. The connection between the ash discharge device (20) and the equipment platform is provided with shock-absorbing pads. The bottom of the support legs and the bottom of the fan (17) are both provided with shock-absorbing pads.

10. A dual-layer filtration dust removal device according to claim 5, characterized in that, The dual-layer filtration dust removal device includes two sets of dust removal chambers symmetrically arranged on the left and right, each consisting of an upper filter chamber (5) and a lower filter chamber (11), and a clean air chamber disposed between the two sets of dust removal chambers. The upper tube sheet (23) of the two sets of dust removal chambers is connected to the upper tube sheet and surrounds the top of the outer shell (1) to form an upper clean air chamber (7). The lower clean air chamber (13) includes a lower left clean air chamber and a lower right clean air chamber separated on the left and right. The upper ends of the lower left clean air chamber and the lower right clean air chamber merge to form an upper clean air channel (9). The upper end of the upper clean air channel (9) is connected to the air outlet of the upper tube sheet (23). The lower ends of the lower left clean air chamber and the lower right clean air chamber merge to connect to the fan (17).

Images