Filter cartridge for dust filtration and mining dust removal equipment

Abstract

The utility model relates to a filter cartridge for dust filtration and mining dust removal equipment, the filter cartridge comprises: a filter screen, the filter screen is enclosed by a metal porous filter screen, the outer inclined surfaces of a plurality of folded wave units form a dust filtration surface, and the inner cavity of the filter screen forms an air flow channel; the lower cover seals the lower end opening of the filter screen; the upper cover is provided with an air outlet, and the air outlet is communicated with the inner cavity of the filter screen. The mining dust removal equipment comprises a box body, a pattern plate and a filter cartridge, the pattern plate is arranged in the box body and divides the box body into an upper channel and a lower channel, a dust filtering surface of the filter screen is positioned in the lower channel, and an air outlet of the filter cartridge is communicated with the upper channel. And the outer side inclined surfaces of the plurality of wave folding units in the filter screen form a dust filtering surface, so that the filtering area is increased. The metal porous filter screen forms the filter screen of the filter cartridge, so that the filter cartridge is flame-retardant, high-temperature-resistant, not easy to burn and damage and not easy to deform; the anti-static performance is achieved, and charges generated by friction between air flow and the filter cartridge are guided out in time; the filter cartridge has waterproof and corrosion-resistant performance, and the service life of the filter cartridge is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of dust filtration technology, and in particular to a filter cartridge for dust filtration and a dust removal device for mining. Background Technology

[0002] Currently, baghouse dust collectors are commonly used in mining dust removal equipment. The filter bags used are mostly made of organic fibers, hence the name "cloth bags." However, they have drawbacks such as poor high-temperature resistance and low filtration accuracy. There are also some dust collector filter cartridges, where the filter bag's skeleton includes multiple support frames and inner and outer support rings. These support frames and rings support the filter bag, resulting in a relatively complex skeleton structure. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a filter cartridge for dust filtration and a dust removal device for mining, which is applicable to dust removal in mining and can withstand high temperature, is not easily deformed, is flame retardant and antistatic.

[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: Firstly, a filter cartridge for dust filtration, comprising:

[0005] The filter screen is formed by a metal porous filter screen, the filter screen has multiple pleated units, the outer slope of the multiple pleated units forms a dust filtering surface, and the inner cavity of the filter screen forms an airflow channel.

[0006] The lower cover is located at the lower end of the filter screen and seals the lower opening of the filter screen.

[0007] The top cover, located at the top of the filter screen, has an air outlet that communicates with the inner cavity of the filter screen as an air outlet channel for the filtered airflow.

[0008] Preferably, the porous metal filter screen is made by sintering metal powder or metal fiber.

[0009] Preferably, the lower cover has an inner ring, an outer ring, and a base plate. The base plate seals the lower opening of the filter screen. The inner ring is placed inside the inner cavity of the filter screen, and the outer ring is placed outside the filter screen. Adhesive is injected between the outer ring and the outer surface of the filter screen to form a lower adhesive layer, thereby fixing the lower cover to the filter screen. Alternatively, the outer ring or inner ring of the lower cover is welded to the outer surface of the filter screen.

[0010] Preferably, the top cover includes a first top cover and a second top cover. The first top cover is provided with an air outlet. The upper end of the filter screen is inserted into the gap groove formed between the first top cover and the second top cover. The outer side of the second top cover has a second slot for installing a sealing ring. The first top cover and the second top cover are fixedly formed as an integral structure or the first top cover and the second top cover are integrally formed.

[0011] Preferably, a hoop is inserted into the outer surface of the metal porous filter screen. The hoop includes an annular ring or a hoop formed by multiple protruding teeth, with each protruding tooth correspondingly embedded in the space formed by the outer surfaces of the first and second sides of each corrugated unit.

[0012] Preferably, the inner cavity of the filter screen is further provided with a second metal mesh, the average pore size of the second metal mesh being larger than the average pore size of the filter screen, and the pore shape of the second metal mesh being circular or prismatic.

[0013] Preferably, the corrugated unit includes a first side, a second side, a first arc-shaped portion at the end of the first side, and a second arc-shaped portion between the first side and the second side; in the filter screen, the second side of one corrugated unit at the edge has a first mating edge, and the first side of another corrugated unit at the other edge has a second mating edge, and the first mating edge and the second mating edge are pressed together by a metal edging.

[0014] Preferably, the included angle α formed by the outer surfaces of the first side and the second side is greater than the included angle β formed between the inner surface of the second side and the inner surface of the first side of the adjacent corrugated unit.

[0015] Preferably, a conductive metal sheet is sandwiched in the gap formed by the upper part of the first mating edge and the upper part of the second mating edge, or a conductive metal sheet is sandwiched between the first mating edge and the metal edging, or a conductive metal sheet is sandwiched between the second mating edge and the metal edging. The upper end of the metal edging clamps the conductive metal sheet between the first mating edge and the second mating edge, or between the first mating edge and the metal edging, or between the second mating edge and the metal edging. The extension of the conductive metal sheet is connected and fixed to the metal post. The metal post extends out of the upper cover and is used to connect to the external grounding wire.

[0016] Secondly, a dust removal device for mining includes a housing, a perforated plate, and the aforementioned filter cartridges. The perforated plate is placed inside the housing, forming an upper channel and a lower channel. The perforated plate has multiple openings, and filter cartridges are placed in each of the multiple openings. A sealing ring is provided between the upper cover of the filter cartridge and the edge of the opening of the perforated plate. The dust filtration surface of the filter screen is located in the lower channel. The air outlet of the filter cartridge is connected to the upper channel. An air inlet is provided at the front end of the lower channel, and the rear end of the lower channel is closed. An exhaust device is provided at the rear outlet of the upper channel for exhaust. The airflow carrying dust enters from the air outlet of the lower channel, is filtered by the filter cartridge, and then enters the inner cavity of the filter cartridge, flowing from the air outlet of the filter cartridge to the upper channel.

[0017] Preferably, a jetting device is provided at the front end of the upper channel, and the jetting nozzle of the jetting device is located at the upper end of the air outlet of the filter cartridge.

[0018] The beneficial effects of this invention are as follows: In mining dust removal environments, the outer inclined surfaces of multiple corrugated units in the filter screen form a dust filtration surface. Compared to ordinary circular filter screens formed by thin sheets, this increases the filtration area. The filtered airflow flows out from the airflow channel inside the filter cartridge. The filter cartridge is closed at one end, forming a unidirectional airflow channel with the airflow direction upward. Compared to filter cartridges and screens made of commonly used chemical composite materials such as polyester fibers, the metal porous filter screen forming the filter cartridge is flame-retardant and high-temperature resistant, not easily burned or damaged, and not easily deformed. It also has antistatic properties, which can promptly discharge the charge generated by the friction between the airflow and the filter cartridge, avoiding the danger of deflagration due to charge accumulation and discharge in flammable gas environments such as coal mine methane. The filter cartridge is waterproof and corrosion-resistant, improving its service life. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the filter cartridge in Embodiment 1 of this utility model;

[0020] Figure 2 yes Figure 1 The main view;

[0021] Figure 3 yes Figure 2 AA section view;

[0022] Figure 4 yes Figure 3 Enlarged view of point C in the middle;

[0023] Figure 5 yes Figure 2 BB cross-sectional view;

[0024] Figure 6 yes Figure 5 Enlarged view at point D;

[0025] Figure 7This is a partial three-dimensional schematic diagram showing the separation of the first upper cover, the second upper cover, the hoop, and the filter screen in this utility model;

[0026] Figure 8 This is a partial three-dimensional schematic diagram of the separation of the filter screen and the lower cover in this utility model;

[0027] Figure 9 This is a front view of the filter cartridge in Embodiment 2 of this utility model;

[0028] Figure 10 yes Figure 9 EE sectional view;

[0029] Figure 11 yes Figure 10 Enlarged view of point G in the middle;

[0030] Figure 12 yes Figure 9 FF sectional view;

[0031] Figure 13 yes Figure 12 Enlarged view of point H in the middle;

[0032] Figure 14 This is a partial cross-sectional view of the upper end of the filter cartridge in Embodiment 2 of this utility model;

[0033] The components are: 1. Filter screen; 2. Lower cover; 201. Inner ring of lower cover; 202. Outer ring of lower cover; 203. Base plate; 301. First upper cover; 302. Second upper cover; 4. Hoop; 501. First side; 502. Second side; 6. Metal edging; 7. Conductive metal sheet; 8. Metal column. Detailed Implementation

[0034] The present invention will now be described in further detail with reference to the accompanying drawings and preferred embodiments. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0035] Firstly, a filter cartridge for dust filtration, as described in Embodiment 1, such as... Figures 1-8 As shown, it includes:

[0036] Filter 1, the filter 1 is formed by a metal porous filter screen, the filter 1 has multiple corrugated units, the outer inclined surface of the multiple corrugated units forms a dust filtering surface, and the inner cavity of the filter 1 forms an airflow channel.

[0037] The lower cover 2 is located at the lower end of the filter screen 1, and the lower cover 2 seals the lower opening of the filter screen 1;

[0038] The top cover, located at the upper end of the filter screen 1, has an air outlet that connects to the inner cavity of the filter screen 1, serving as an outlet channel for the filtered airflow. In a mining dust removal environment, the outer slopes of multiple corrugated units in the filter screen 1 form a dust filtration surface, increasing the filtration area compared to a circular filter screen 1 formed by ordinary thin sheets. The filtered airflow flows out from the airflow channel within the filter cartridge's inner cavity. The filter cartridge is closed at one end, forming a unidirectional airflow channel with the airflow direction upward. The filter screen 1, formed by the metal porous filter screen, can withstand higher temperatures. In mining dust removal environments, the airflow carrying dust is at a high temperature, easily scorching ordinary fiber-made filter bags. Fiber-made filter bags are flammable. The metal porous filter screen used in this invention is not easily scorched or damaged, is flame-retardant, high-temperature resistant, and not easily deformed. Furthermore, the metal porous filter screen is less prone to generating static electricity compared to conventional fiber-based filter screens.

[0039] Specifically, in one optional embodiment, the porous metal filter screen is made by a sintering process of metal powder or metal fibers. For example, the porous metal filter screen can be made using the method for preparing flexible porous metal foil described in Chinese Utility Model Patent 201510153116.3, or using the porous film and its preparation method described in Chinese Utility Model Patent 201610173115.X, or other sintering processes.

[0040] Specifically, in one alternative implementation, such as Figure 8 As shown, the lower cover 2 has an inner ring, an outer ring, and a base plate 203. The base plate 203 seals the lower opening of the filter screen 1. The inner ring 201 is placed in the inner cavity of the filter screen 1, and the outer ring 202 is placed on the outside of the filter screen 1. Adhesive is injected between the outer ring 202 and the outer surface of the filter screen 1 to form a lower adhesive layer, thereby fixing the lower cover 2 to the filter screen 1. Alternatively, the outer ring 202 or the inner ring 201 is welded to the outer surface of the filter screen 1. The lower adhesive layer is not shown in the figure.

[0041] Specifically, in one alternative implementation, such as Figure 5 , Figure 6As shown, the upper cover includes a first upper cover 301 and a second upper cover 302. The first upper cover 301 is provided with an air outlet. The upper end of the filter screen 1 is inserted into the gap groove formed between the first upper cover 301 and the second upper cover 302. The outer side of the second upper cover 302 has a second slot for installing a sealing ring. The first upper cover 301 and the second upper cover 302 are fixedly formed as an integral structure or are integrally formed. When the filter cartridge is installed with the tube sheet in the mining dust removal equipment, the sealing ring is placed into the first slot, and the outer edge of the sealing ring makes sealing contact with the opening edge of the petals. The sealing ring is not shown in the figure. The upper end of the filter screen 1 is inserted into the gap groove formed by the inner ring of the first upper cover 301 and the inner ring of the second upper cover 302. Glue is then injected into the gap groove to form an adhesive layer, thereby fixing the first upper cover 301, the second upper cover 302 and the filter screen 1; or, the first upper cover 301 or the second upper cover 302 is welded to the outer surface of the filter screen 1, and the adhesive layer is not shown in the figure.

[0042] Specifically, in one alternative implementation, such as Figure 1 , Figure 7 As shown, a hoop 4 is fitted into the outer surface of the porous metal filter. The hoop 4 includes an annular ring or a hoop formed by multiple protruding teeth. Each protruding tooth is embedded in the space formed by the outer surfaces of the first side 501 and the second side 502 of each corrugated unit. By providing the hoop 4 with protruding teeth, the strength of the porous metal filter can be enhanced, making it less prone to deformation. Furthermore, the included angle α formed by the outer surfaces of the first side 501 and the second side 502 in each corrugated unit can be kept stable.

[0043] Specifically, in one optional embodiment, the inner cavity of the filter 1 is further provided with a second metal mesh, the average pore size of the second metal mesh being larger than the average pore size of the filter 1. The second metal mesh is not shown in the figure. The pore shape of the second metal mesh can be circular, prismatic, or other shapes.

[0044] Specifically, in one alternative implementation, such as Figures 3-4 As shown, the corrugated unit includes a first side 501, a second side 502, a first arc-shaped portion at the end of the first side 501, and a second arc-shaped portion between the first side 501 and the second side 502; in the filter screen 1, the second side 502 of one corrugated unit at the edge has a first mating edge, and the first side 501 of another corrugated unit at the other edge has a second mating edge, and the first mating edge and the second mating edge are pressed together by a metal edging 6.

[0045] Specifically, in one alternative implementation, such as Figures 3-4As shown, the angle α formed by the outer surfaces of the first side 501 and the second side 502 is greater than the angle β formed between the inner surface of the second side 502 and the inner surface of the first side 501 of the adjacent corrugated unit. The larger angle α between the outer surfaces of the first side 501 and the second side 502 results in a larger dust filtration area. The smaller angle β between the inner surface of the second side 502 and the inner surface of the first side 501 of the adjacent corrugated unit results in a shorter impact distance when the jet airflow collides with the inner surface of the second side 502 and the inner surface of the first side 501 of the adjacent corrugated unit during jet cleaning, thus improving the jet cleaning efficiency.

[0046] Specifically, a filter cartridge for dust filtration, as in Embodiment 2, such as... Figures 9-14 As shown, the difference from Embodiment 1 is that: a conductive metal sheet 7 is sandwiched in the gap formed by the upper part of the first mating edge and the upper part of the second mating edge, or a conductive metal sheet 7 is sandwiched between the first mating edge and the metal edging, or a conductive metal sheet 7 is sandwiched between the second mating edge and the metal edging. The upper end of the metal edging 6 clamps the conductive metal sheet 7 between the first mating edge and the second mating edge, or between the first mating edge and the metal edging, or between the second mating edge and the metal edging. The extension of the conductive metal sheet 7 is connected and fixed to the metal post 8. The metal post 8 extends out of the upper cover and is used to connect to an external grounding wire. If some charge may be generated by dust impact, the charge can be grounded and led out through the metal edging 6, the conductive metal sheet 7, and the metal post 8.

[0047] Secondly, a dust removal device for mining includes a housing, a perforated plate, and the aforementioned filter cartridges. The perforated plate is placed inside the housing, forming an upper channel and a lower channel. The perforated plate has multiple openings, each into which a filter cartridge is placed. A sealing ring is provided between the top cover of the filter cartridge and the edge of the opening of the perforated plate. The dust filtration surface of the filter screen 1 is located in the lower channel. The air outlet of the filter cartridge is connected to the upper channel. An air inlet is provided at the front end of the lower channel, and the rear end of the lower channel is closed. An exhaust device is provided at the rear end outlet of the upper channel for exhaust. The airflow carrying dust enters from the air outlet of the lower channel, is filtered by the filter cartridge, and then enters the inner cavity of the filter cartridge, flowing from the air outlet of the filter cartridge to the upper channel. A jet-blowing device is provided at the front end of the upper channel, with the jet nozzle of the jet-blowing device positioned above the air outlet of the filter cartridge. During dust removal, the exhaust device at the rear end outlet of the upper channel exhausts the airflow, causing the airflow to flow upward from the inner cavity of the filter cartridge to the upper channel, forming an upward unidirectional flow. The nozzle of the jet blowing device is placed at the upper end of the air outlet of the filter cartridge to blow the filter cartridge. The jet blowing airflow is a downward unidirectional flow, which makes the dust flow downward, does not affect the upper channel, and reduces the entry of dust into the upper channel.

[0048] The above description is only a specific embodiment of the present utility model. Various examples and illustrations do not constitute a limitation on the substantive content of the present utility model. Those skilled in the art can modify or transform the above-described specific embodiments after reading the description without departing from the essence and scope of the utility model.

Claims

1. A filter cartridge for dust filtration, characterized in that: include: The filter screen (1) is formed by a metal porous filter screen. The filter screen (1) has multiple corrugated units. The outer slope of the multiple corrugated units forms a dust filtering surface. The inner cavity of the filter screen (1) forms an airflow channel. The lower cover (2) is located at the lower end of the filter screen (1) and the lower cover (2) seals the lower opening of the filter screen (1); The top cover is located at the upper end of the filter (1). The top cover has an air outlet, which is connected to the inner cavity of the filter (1) as an air outlet channel for the filtered airflow.

2. The filter cartridge for dust filtration according to claim 1, characterized in that: The porous metal filter screen is made by sintering metal powder or metal fiber.

3. A filter cartridge for dust filtration according to claim 1, characterized in that: The lower cover (2) has an inner ring (201), an outer ring (202), and a base plate (203). The base plate (203) seals the lower opening of the filter screen (1). The inner ring (201) is placed in the inner cavity of the filter screen (1), and the outer ring (202) is placed on the outside of the filter screen (1). The outer ring (202) and the outer surface of the filter screen (1) are glued together to form a lower glue layer, thereby fixing the lower cover (2) to the filter screen (1). Alternatively, the outer ring (202) or the inner ring (201) is welded to the outer surface of the filter screen (1).

4. A filter cartridge for dust filtration according to claim 1, characterized in that: The top cover includes a first top cover (301) and a second top cover (302). The first top cover (301) is provided with an air outlet. The upper end of the filter (1) is inserted into the gap groove formed between the first top cover (301) and the second top cover (302). The outer side of the second top cover (302) has a second slot for installing a sealing ring. The first top cover (301) and the second top cover (302) are fixedly formed as an integral structure or the first top cover (301) and the second top cover (302) are integrally formed.

5. A filter cartridge for dust filtration according to claim 1, characterized in that: The outer surface of the metal porous filter mesh is fitted with a hoop (4), which includes an annular ring or a hoop formed by multiple protruding teeth. Each protruding tooth is embedded in the space formed by the outer surface of the first side (501) and the outer surface of the second side (502) of each corrugated unit.

6. A filter cartridge for dust filtration according to claim 1, characterized in that: The inner cavity of the filter (1) is also provided with a second metal mesh, the average pore size of the second metal mesh is larger than the average pore size of the filter (1), and the pore shape of the second metal mesh is circular or prismatic.

7. A filter cartridge for dust filtration according to claim 1, characterized in that: The corrugated unit includes a first side (501), a second side (502), a first arc-shaped portion at the end of the first side (501), and a second arc-shaped portion between the first side (501) and the second side (502); in the filter screen (1), the second side (502) of a corrugated unit at the edge has a first mating edge, and the first side (501) of a corrugated unit at the other edge has a second mating edge, and the first mating edge and the second mating edge are pressed together by a metal edging (6).

8. A filter cartridge for dust filtration according to claim 6, characterized in that: The included angle α formed by the outer surface of the first side (501) and the outer surface of the second side (502) is greater than the included angle β formed between the inner surface of the second side (502) and the inner surface of the first side (501) of the adjacent corrugated unit.

9. A filter cartridge for dust filtration according to claim 7, characterized in that: A conductive metal sheet (7) is sandwiched in the gap formed between the upper part of the first mating edge and the upper part of the second mating edge, or a conductive metal sheet (7) is sandwiched between the first mating edge and the metal edging edge, or a conductive metal sheet (7) is sandwiched between the second mating edge and the metal edging edge. The upper end of the metal edging edge (6) clamps the conductive metal sheet (7) between the first mating edge and the second mating edge, or between the first mating edge and the metal edging edge, or between the second mating edge and the metal edging edge. The extension of the conductive metal sheet (7) is connected and fixed to the metal post (8). The metal post (8) extends out of the top cover and is used to connect to the external grounding wire.

10. A dust removal device for mining, characterized in that: The device includes a housing, a perforated plate, and a filter cartridge as described in any one of claims 1-9. The perforated plate is placed inside the housing and forms an upper channel and a lower channel within the housing. The perforated plate has multiple openings, and filter cartridges are placed in the multiple openings respectively. A sealing ring is provided between the upper cover of the filter cartridge and the edge of the opening of the perforated plate. The dust filtration surface of the filter screen (1) is located in the lower channel. The air outlet of the filter cartridge is connected to the upper channel. An air inlet is provided at the front end of the lower channel. The rear end of the lower channel is closed. An exhaust device is provided at the rear end outlet of the upper channel for exhaust. The airflow carrying dust enters from the air outlet of the lower channel, is filtered by the filter cartridge, and then enters the inner cavity of the filter cartridge and flows from the air outlet of the filter cartridge to the upper channel.

11. The dust removal equipment for mining according to claim 10, characterized in that: A jetting device is installed at the front end of the upper channel, and the jetting nozzle of the jetting device is located at the upper end of the air outlet of the filter cartridge.

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