Accumulated powder blowing device at inlet of dust collector

Abstract

The utility model relates to the technical field of dust collector cleaning, and solves the problem of cleaning accumulated dust of a horizontal pipe section. The accumulated powder blowing device comprises an air inlet pipe, one end of the air inlet pipe is connected with an air inlet plate extending to a horizontal pipe section of a coal mill, air outlets matched with the air inlet pipe in number are formed in the air inlet plate, a dust removal plate is installed on the air inlet plate, and a dust discharging plate is arranged between the adjacent air outlets of the dust removal plate. Isolation end plates are mounted at the left end and the right end of the dust discharging plate, dust discharging end plates are mounted at the front end and the rear end of the air inlet plate, the dust discharging plate comprises a spacing plate and guide plates mounted at the front end and the rear end of the spacing plate and used for guiding accumulated dust to move towards the air outlet, and slope plates for guiding the accumulated dust to the air inlet plate are mounted at the left end and the right end of the spacing plate; a dust suppression plate flush with the bottom face of the spacing plate is arranged at the lower end of the slope plate and is in a vertical plate shape, a plurality of dust guide openings are formed in the dust suppression plate, and a dust overflow opening is formed in the end face, opposite to the dust suppression plate, of the isolation end plate.

Description

Technical Field

[0001] This utility model relates to the field of dust collector cleaning technology, specifically a dust collector inlet dust blowing device. Background Technology

[0002] During the operation of the coal mill system, a centrifugal fan drives the gas circulation within the system, conveying the qualified coal powder from the mill out of the mill. The qualified coal powder is collected by a dust collector. The circulating air has a 90° non-standard duct at the dust collector inlet. During the process of the circulating air entering the dust collector, there is a dead zone at the bottom of the horizontal duct section, where large-diameter coal powder accumulates.

[0003] During pulverizing shutdown, the oxygen content in the coal mill system increases, and the accumulated high-temperature coal powder is highly susceptible to spontaneous combustion, posing a hazard. Because the horizontal pipe section is equipped with an expansion joint, it is not advisable to add a baffle plate, and there is no maintenance platform at the powder accumulation location, making manual cleaning of the coal mill system during operation impractical. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a dust collection inlet dust-blowing device, which solves the problem of cleaning dust accumulation in horizontal pipe sections.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a dust collection inlet dust blowing device, including an air inlet pipe, one end of which is connected to an air inlet plate extending into the horizontal section of the coal mill, the air inlet plate having an air outlet adapted to the number of air inlet pipes, and a dust removal plate installed on the air inlet plate.

[0006] The dust removal plate is provided with a dust discharge plate between adjacent air outlets, and isolation end plates are installed at the left and right ends of the dust discharge plate, and dust discharge end plates are installed at the front and rear ends of the air inlet plate.

[0007] The dust discharge plate includes an interstitial plate and guide plates installed at the front and rear ends of the interstitial plate to guide the dust to move towards the air outlet. The left and right ends of the interstitial plate are equipped with slope plates to guide the dust to the air inlet plate. The lower end of the slope plate is provided with a dust suppression plate that is flush with the bottom surface of the interstitial plate.

[0008] In one embodiment, the dust suppression plate is a vertical plate with several dust guide ports on it. The isolation end plate and the dust suppression plate have dust overflow ports on their opposite end faces. The dust overflow ports are opened at an angle. The isolation end plate is connected to an inclined plate at the upper end of the dust overflow port. The dust overflow port establishes a dust guide channel between the inclined plate and the air outlet.

[0009] In one embodiment, the dust discharge end plate opposite the air outlet has the same structure as the dust discharge plate, while the other end of the structure is rectangular and flush with the side wall of the air inlet plate.

[0010] In one embodiment, the guide plate is arc-shaped and the diameter enclosed by two adjacent guide plates is larger than the diameter of the air outlet. A sleeve plate with a diameter smaller than the diameter enclosed by the two guide plates is fitted over the air outlet, and the height of the sleeve plate is greater than the height of the intervening plate.

[0011] In one embodiment, a connecting sleeve adapted to the position of the air outlet is installed at the bottom of the air inlet plate, and the connecting sleeve is threadedly connected to the connecting sleeve by an end sleeve.

[0012] In one embodiment, the air inlet pipe is connected to the lower end of the end sleeve for supplying air into the connecting sleeve, and the connecting sleeve has an air passage cavity that matches the diameter of the air outlet.

[0013] Compared with the prior art, the present invention provides a dust collection inlet dust blowing device, which has the following beneficial effects:

[0014] In the technical solution disclosed in this utility model, the air inlet plate is placed inside the horizontal plate. The airflow output from the air inlet plate blows up the dust accumulated in the horizontal pipe and outputs it outward with the airflow, thereby gradually reducing the thickness of the dust accumulation. A sleeve plate is installed outside the air outlet to reduce the problem of dust falling back onto the air outlet and causing air outlet blockage when there is no airflow, thus enhancing the self-maintenance of the air inlet plate.

[0015] By using the dust discharge plate and dust discharge end plate installed on the air inlet plate of this utility model, the accumulated dust will be guided outside the sleeve plate, thereby collecting the accumulated dust in the same position and reducing the area spread on the air inlet plate after the airflow stops. The height of the sleeve plate is greater than the height of the intervening plate, thereby increasing the protection effect on the air outlet. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the connecting sleeve and end sleeve structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the dust removal plate structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the isolation end plate structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the dust discharge plate structure of this utility model.

[0022] In the diagram: 1. Air inlet duct; 2. Air inlet plate; 3. Air outlet; 4. Dust removal plate; 41. Dust discharge plate; 411. Interval plate; 412. Guide plate; 413. Slope plate; 414. Dust suppression plate; 415. Dust guide port; 42. Isolation end plate; 43. Dust discharge end plate; 44. Dust overflow port; 45. Inclined plate; 5. Sleeve plate; 6. Connecting sleeve; 7. End sleeve. Detailed Implementation

[0023] The following will describe in detail the implementation of this application with reference to the accompanying drawings and embodiments, so that the implementation process of how this application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0024] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. 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.

[0025] Figures 1-5 This is one embodiment of the present invention, addressing the specific problem of: During the operation of a coal mill system, a centrifugal fan drives the gas circulation within the system, conveying the pulverized coal powder (finely ground) out of the mill. This fine coal powder is then collected by a dust collector. However, the circulating air has a 90° non-standard duct at the dust collector inlet. During the process of the circulating air entering the dust collector, there is a dead zone at the bottom of the horizontal duct section, where large-diameter coal powder accumulates. During shutdown of the pulverizing process, the oxygen content in the coal mill system increases, and the accumulated high-temperature coal powder is highly susceptible to spontaneous combustion, posing a hazard. Because an expansion joint is installed in this horizontal duct section, it is not advisable to add a guide plate, and there is no maintenance platform at the dust accumulation location, making manual cleaning of the coal mill system during operation difficult. To address the issue of dust accumulation in horizontal pipe sections, this solution describes a dust collector inlet dust-blowing device. The device places an air inlet plate 2 inside a horizontal plate, using the airflow from the air inlet plate 2 to blow up the accumulated dust in the horizontal pipe and discharge it outwards with the airflow, thereby gradually reducing the dust accumulation thickness. A sleeve plate 5 is installed outside the air outlet 3 to reduce the problem of dust falling back onto the air outlet 3 and causing blockage when there is no airflow, thus enhancing the self-maintenance of the air inlet plate 2.

[0026] This solution describes a dust collector inlet dust removal device with an air inlet pipe 1 that draws air from the outside to the inside. One end of the air inlet pipe 1 is connected to an air inlet plate 2 extending into the horizontal section of the coal mill. A connecting sleeve 6, matching the position of an air outlet 3, is installed at the bottom of the air inlet plate 2. The connecting sleeve 6 is threadedly connected to an end sleeve 7. The air inlet pipe 1 is connected to the lower end of the end sleeve 7 to supply air into the connecting sleeve 6. An internal air passage cavity, matching the diameter of the air outlet 3, is opened inside the connecting sleeve 6. The air inlet plate 2 has an number of air outlets 3 matching the number of air inlet pipes 1. A dust removal plate 4 is installed on the air inlet plate 2, which maintains and enhances the unobstructed flow of the air outlets 3.

[0027] Dust removal plate 4 is provided with dust discharge plate 41 between adjacent air outlets 3. Isolation end plates 42 are installed at both ends of the dust discharge plate 41, and dust discharge end plates 43 are installed at the front and rear ends of the air inlet plate 2. The plate body of the dust discharge end plate 43 opposite to the air outlet 3 has the same structure as the dust discharge plate 41, while it is rectangular and flush with the side wall of the air inlet plate 2 at the other end. The dust discharge plate 41 includes an intervening plate 411 and guide plates 412 installed at the front and rear ends of the intervening plate 411 to guide the dust to move towards the air outlet 3. The guide plates 412 are arc-shaped and the diameter enclosed by two adjacent guide plates 412 is larger than the diameter of the air outlet 3. A sleeve plate 5 with a diameter smaller than the diameter enclosed by two guide plates 412 is sleeved on the air outlet 3. The height of the sleeve plate 5 is greater than the height of the intervening plate 411. The left and right ends of the interleaved plate 411 are equipped with slopes 413 that guide dust accumulation towards the air inlet plate 2. The lower end of the slopes 413 is fitted with a dust suppression plate 414 flush with the bottom surface of the interleaved plate 411. The dust suppression plate 414 is vertical and has several dust guide ports 415. An overflow port 44 is provided on the opposite end face of the isolation end plate 42 and the dust suppression plate 414. The overflow port 44 is inclined, and an inclined plate 45 is connected to the upper end of the overflow port 44 of the isolation end plate 42. The overflow port 44 establishes a dust guiding channel between the inclined plate 45 and the air outlet 3. The dust discharge plate 41 and the dust discharge end plate 43 installed on the air inlet plate 2 guide the accumulated dust away from the sleeve plate 5, thereby concentrating the dust in one location and reducing the area spread on the air inlet plate 2 after the airflow ceases. The sleeve plate 5 is set at a height greater than that of the interleaved plate 411, thus increasing the protection effect on the air outlet 3.

[0028] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dust collector inlet dust removal device, comprising an air inlet pipe (1), characterized in that: One end of the air inlet pipe (1) is connected to an air inlet plate (2) extending into the horizontal section of the coal mill. The air inlet plate (2) has an air outlet (3) that matches the number of air inlet pipes (1). A dust removal plate (4) is installed on the air inlet plate (2). The dust removal plate (4) has a dust discharge plate (41) between adjacent air outlets (3), and isolation end plates (42) are installed at the left and right ends of the dust discharge plate (41), and dust discharge end plates (43) are installed at the front and rear ends of the air inlet plate (2). The dust discharge plate (41) includes an inter-plate (411) and a guide plate (412) installed at the front and rear ends of the inter-plate (411) to guide the dust to move towards the air outlet (3). The left and right ends of the inter-plate (411) are equipped with slope plates (413) to guide the dust to the air inlet plate (2). The lower end of the slope plate (413) is provided with a dust suppression plate (414) that is flush with the bottom surface of the inter-plate (411).

2. The dust collection inlet cleaning device according to claim 1, characterized in that: The dust suppression plate (414) is a vertical plate with several dust guide ports (415) on it. The isolation end plate (42) and the dust suppression plate (414) have an overflow port (44) on their opposite end faces. The overflow port (44) is opened at an angle. The isolation end plate (42) is connected to an inclined plate (45) at the upper end of the overflow port (44). The overflow port (44) establishes a dust guide channel between the inclined plate (45) and the air outlet (3).

3. The dust collection inlet cleaning device according to claim 1, characterized in that: The dust discharge end plate (43) opposite the air outlet (3) has the same structure as the dust discharge plate (41), but is rectangular in shape on the other end of the structure and flush with the side wall of the air inlet plate (2).

4. The dust collection inlet cleaning device according to claim 1, characterized in that: The guide plate (412) is arc-shaped and the diameter enclosed by two adjacent guide plates (412) is larger than the diameter of the air outlet (3). A sleeve plate (5) with a diameter smaller than the diameter enclosed by the two guide plates (412) is attached to the air outlet (3). The height of the sleeve plate (5) is greater than the height of the interposed plate (411).

5. The dust collection inlet cleaning device according to claim 3, characterized in that: The bottom of the air inlet plate (2) is fitted with a connecting sleeve (6) that is compatible with the position of the air outlet (3). The connecting sleeve (6) is threadedly connected to the connecting sleeve (6) by an end sleeve (7).

6. The dust collection inlet cleaning device according to claim 1, characterized in that: The air inlet pipe (1) is connected to the lower end of the end sleeve (7) for filling the connecting sleeve (6) with air. The connecting sleeve (6) has an air passage cavity that matches the diameter of the air outlet (3).

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