An oil mist filtration device with an oil mist filter cartridge

Abstract

This invention discloses an oil mist filtration device with a novel oil mist filter cartridge, comprising a housing and an exhaust device. The exhaust device is located at the top of the housing and is used to exhaust the gas inside the housing to the outside. An air inlet is provided on the side of the housing. An open sealing plate is provided inside the housing. Above the sealing plate is a filter assembly composed of multiple oil mist filter cartridges. The oil mist filter cartridge assembly is located inside the housing. Each oil mist filter cartridge includes, from bottom to top, an annular sealing strip, a bottom stamped C-ring, an oil-absorbing felt assembly, and a top stamped cover plate. This invention provides a novel oil mist filter cartridge with progressively denser spacing and a compact structure, as well as an oil mist filtration device with good filtration effect. It can effectively filter industrial gases containing oil mist and has high commercial and promotional value.

Description

Technical Field

[0001] This invention relates to the field of oil mist gas purification and treatment, and more specifically, to an oil mist filtration device with an oil mist filter cartridge. Background Technology

[0002] With the rapid development of industry and commerce, the number of machine tools has increased rapidly, and national income has risen, creating a greater demand for a comfortable working environment. However, industrial production typically generates large amounts of oil mist, which, if inhaled over a long period, can lead to lung, liver, and throat cancer, and may also induce chronic eye diseases and skin rashes. Therefore, oil mist filters not only improve work efficiency and create a comfortable working environment, but also filter and purify processing waste gases, ensuring that the final gas meets emission standards.

[0003] However, the filtration effect of general oil mist filters is limited. Most filter elements are plate-type or tightly pleated type. For the same filtration area, plate-type filter elements result in larger oil mist filtration equipment, which takes up more space and is more expensive. For the same filtration area, tightly pleated filter elements result in smaller oil mist filtration equipment, but they become severely clogged when the oil mist exhaust gas contains particulate matter. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an oil mist filtration device with an oil mist filter cartridge, so as to solve the problems that oil mist gas is difficult to treat, that general plate filter cartridges are large in size, occupy a large area and are costly, and that tightly pleated filter cartridge oil mist filtration equipment is severely clogged and cannot be implemented when the oil mist exhaust gas contains particulate matter.

[0005] The technical solution adopted by the present invention is as follows: an oil mist filtration device with an oil mist filter cartridge is provided, including a housing, an exhaust device, and an oil mist filter cartridge. The exhaust device is disposed on the top of the housing and is used to exhaust the gas inside the housing to the outside of the housing. An air inlet is disposed on the side of the housing and is located below the oil mist filter cartridge. A sealing plate is provided inside the housing, and a sealing plate opening is provided on the sealing plate. The oil mist filter cartridge is disposed above the sealing plate opening, and the oil mist filter cartridge includes an annular sealing strip, a bottom stamped C-ring, an oil-absorbing felt assembly, and a top stamped cover plate arranged sequentially from bottom to top. The annular sealing strip is disposed between the bottom stamped C-ring and the sealing plate.

[0006] This invention employs a C-shaped steel of appropriate width as the bottom stamped C-shaped ring. The bottom of the oil-absorbing felt assembly is inserted into the C-shaped groove of the C-shaped steel, which can effectively fix the oil-absorbing felt assembly. Furthermore, the C-shaped steel that matches the bottom of the oil-absorbing felt assembly does not need to be grooved separately. The size of the opening in the sealing plate is generally close to the size of the oil mist filter cartridge, which is used to install the oil mist filter cartridge on the upper part of the opening in the sealing plate. This can control the gas to be filtered in the lower part to flow into the oil mist filter cartridge only through the opening in the sealing plate.

[0007] As a preferred embodiment, the sealing plate is welded to the side wall of the housing, thereby ensuring the airtightness of the sealing plate and preventing gas from flowing into the upper part of the housing from the opening of the sealing plate.

[0008] As a preferred embodiment, the sealing plate has multiple sealing plate openings, and a positioning ring is circumferentially welded to the sealing plate corresponding to the opening positions. The size and shape of the positioning ring are adapted to the bottom stamped C-ring, and the positioning ring is suitable for installing the oil mist filter cartridge. By providing multiple sealing plate openings, multiple oil mist filter cartridges can be installed on the sealing plate to improve filtration efficiency. The positioning rings are used for installing the oil mist filter cartridges and also reinforce the bottom stamped C-ring of the oil mist filter cartridge.

[0009] As a preferred embodiment, a hook strip is welded onto the positioning ring. The oil mist filter cartridge is connected to the sealing plate via a filter cartridge fastener, which is a hook. The hook portion engages with the hook strip, and the hook's shank is threaded to the top stamped cover plate. The filter cartridge fastener secures the oil mist filter cartridge to the sealing plate, thus connecting the filter cartridge fastener to the housing. Furthermore, the filter cartridge fastener also reinforces the oil-absorbing felt assembly.

[0010] As a preferred embodiment, the sealing plate is a perforated plate, which is a steel plate with multiple round holes on its surface. By directly installing the perforated plate inside the housing, it is convenient to further install the oil mist filter cartridge on each round hole of the perforated plate.

[0011] As a preferred embodiment, a demisting plate is also provided between the sealing plate and the air inlet. The demisting plate can perform initial filtration of larger oil mist particles, improve the pre-filtration effect, and reduce the filtration pressure of the oil-absorbing felt assembly.

[0012] As a preferred embodiment, the oil-absorbing felt is a filter cartridge structure, and the oil-absorbing felt assembly specifically includes, from the inside out, a cylindrical perforated plate liner, loose-pile felt, medium-pile felt, dense-pile felt, and an outermost spirally wound binding strap; the thickness of the loose-pile felt, medium-pile felt, and dense-pile felt decreases sequentially, the weaving density of the loose-pile felt, medium-pile felt, and dense-pile felt increases sequentially, and the fiber density of the loose-pile felt, medium-pile felt, and dense-pile felt decreases sequentially; that is, the loose-pile felt has the greatest thickness, followed by the medium-pile felt, and the dense-pile felt has the smallest thickness; the loose-pile felt has the greatest weaving density. The weaving density of small and medium-sized felts is the second lowest, while that of dense felts is the highest. The fibers of dense felts are the finest, followed by medium-sized felts, and the fibers of sparse felts are the coarsest. Through the design of these sparse, medium, and dense felts from the inside out, the filtration of mist can be maximized. Spiral wrapping straps are tied to the outside of the dense felt to fix it in place. The fixing of the straps can strengthen the overall strength of the oil-absorbing felt assembly. The cylindrical perforated plate lining can also reinforce the structure of the entire oil-absorbing felt assembly, solving the problem of easy clogging of tightly pleated filter element oil mist filtration equipment when encountering particulate matter.

[0013] As a preferred embodiment, the housing is provided with an inspection door, the position of which corresponds to the oil mist filter cartridge. The inspection door facilitates maintenance personnel to perform maintenance on the inside of the housing, such as cleaning the air inlet and the side wall of the housing.

[0014] The housing also includes a base plate and a siphon tube. The base plate is positioned below the air inlet. The inlet end of the siphon tube connects to the interior of the housing above the base plate, while the outlet end of the siphon tube is lower than the inlet end and located outside the housing. The bottom of the siphon tube has a U-shaped structure. The siphon tube effectively draws out oil flowing to the upper part of the base plate, thus preventing blockages inside the housing.

[0015] As a preferred embodiment, the exhaust device is a fan, and the fan is located at the top inside the housing. The fan is used to exhaust the filtered gas inside the housing.

[0016] As a preferred embodiment, the bottom stamped C-ring (33) is provided with an oil drain hole. Setting the oil drain hole on the bottom stamped C-ring also facilitates the oil mist filtered by the oil-absorbing felt assembly to flow directly out of the oil drain hole after falling by gravity.

[0017] As a preferred embodiment, the cylindrical perforated plate liner is provided with multiple vent holes, and the design of the vent holes allows the air entering the oil mist filter cartridge to enter the felt.

[0018] This invention provides an oil mist filtration device with a novel oil mist filter cartridge featuring a gradually increasing density by rationally improving the internal structure of the filter. Employing multiple filtration methods for the gas, it effectively and efficiently captures and filters oil mist particles in the gas. The oil-absorbing felt in this invention adopts a multi-layer design, which greatly enhances the adsorption capacity for oily particles in the gas. Furthermore, this invention has a simple design and integrated structure, resulting in higher space utilization and a more compact structure compared to traditional filtration equipment, making it highly valuable for practical use and promotion. Attached Figure Description

[0019] Figure 1 It is a front structural schematic diagram of the present invention;

[0020] Figure 2 This is a side view of the present invention;

[0021] Figure 3 This is a cross-sectional view of the novel filter cartridge and its assembly according to the present invention;

[0022] Figure 4 This is a partial schematic diagram of the lower opening of the novel filter cartridge of the present invention;

[0023] Figure 5 This is a partial schematic diagram of the connection between the oil mist filter cartridge fastener and the sealing plate of the present invention;

[0024] Figure 6 This is a partial schematic diagram of the opening of the sealing plate of the present invention;

[0025] Description of the numbers in the figure:

[0026] The components are as follows: 1. Shell; 2. Exhaust device; 3. Oil mist filter cartridge; 31. Top stamped cover plate; 32. Oil-absorbing felt assembly; 321. Orifice plate cylindrical liner; 322. Loose felt; 323. Medium felt; 324. Dense felt; 325. Spiral binding strap; 33. Bottom stamped C-ring; 331. Oil drain hole; 34. Annular sealing strip; 4. Sealing plate; 41. Sealing plate opening; 42. Positioning ring; 43. Hook strip; 5. Demister plate; 6. Air inlet; 7. Siphon tube; 8. Inspection door; 9. Filter cartridge fastener; 91. Hook; 92. Rod; 10. Base plate. Detailed Implementation

[0027] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0028] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, Figure 1 The diagram illustrates the structure of this invention. An oil mist filtration device with an oil mist filter cartridge includes a housing 1 with an air inlet 6. A filter assembly is located inside the housing 1, comprising an oil mist filter cartridge 3 disposed within the housing 1. The oil mist filter cartridge 3 is composed of a bottom-stamped C-ring 33 connected sequentially from bottom to top to a ring-shaped sealing strip 34, an oil-absorbing felt assembly 32, and a top-stamped cover plate 31. The bottom-stamped C-ring 33 is used to fix the oil-absorbing felt assembly. A sealing plate opening 41 is provided on the bottom-stamped C-ring 33. The number of oil mist filter cartridges 3 can be one or more, depending on the actual amount of gas to be filtered. Correspondingly, the number of sealing plate openings 41 is the same as the number of oil mist filter cartridges, and the shape and size of the sealing plate openings 41 match the bottom-stamped C-ring 33.

[0029] The oil-absorbing felt assembly 32 is composed of several fiber filaments and has a filter cartridge structure. The interior of the oil-absorbing felt assembly 32 is shaped using a perforated cylindrical liner 321 as a filter framework, and the perforated cylindrical liner 32 has openings for gas entry. A bottom-stamped C-ring 33 is located at the bottom of the oil-absorbing felt assembly 32, and a top-stamped cover plate 31 is located at the top of the oil-absorbing felt assembly 32. The bottom-stamped C-ring 33 and the top-stamped cover plate 31 are connected by oil-resistant adhesive. The mixture is connected to the oil-absorbing felt assembly 32, which specifically includes a loose-textured felt 322, a medium-textured felt 323, and a dense-textured felt 324 arranged sequentially from the inside to the outside. The thickness of the loose-textured felt 322, the medium-textured felt 323, and the dense-textured felt 324 decreases sequentially, the weaving density of the loose-textured felt 322, the medium-textured felt 323, and the dense-textured felt 324 increases sequentially, and the fiber density of the loose-textured felt 322, the medium-textured felt 323, and the dense-textured felt 324 decreases sequentially. Example

[0030] The structure of Example 2 is similar to that of Example 1, except that: Figure 1 As shown, the air inlet is located at the lower part of the housing 1, specifically below the filter assembly, while the exhaust device 2 is located at the top of the housing 1. Thus, the entire device is a bottom-up air-passing system for treating oil mist gas. Similarly, in embodiment 2, the structure of the oil mist filter cartridge 3 also adopts a bottom-up air-passing structure, with the inner ring of the bottom-pressed C-shaped ring 33 serving as the gas inlet for entering the oil mist filter cartridge, while the top-pressed cover plate 31 is completely sealed.

[0031] The filtration device also includes a demister plate 5, which is located below the sealing plate 4 and above the air inlet 6. The sealing plate 4 is connected to the side wall of the housing 1 by welding. The sealing plate 4 has a sealing plate opening 41 at the corresponding position of the oil mist filter cartridge 3. Generally, the shape of the sealing plate opening 41 is the same as that of the bottom stamped C-ring, but slightly smaller than the bottom stamped C-ring. A positioning ring 42 is welded circumferentially to the sealing plate 4 at the position corresponding to the sealing plate opening 41. The positioning ring is used to install the bottom stamped C-ring 33. A hook strip 43 is provided on the positioning ring. The hook strip 43 is used to fix the hook part 91 of the filter cartridge fastener 9. Example

[0032] The structure of Embodiment 3 is similar to that of Embodiment 2, except that the bottom-stamped C-ring 33 is a C-shaped steel that matches the shape of the bottom of the oil-absorbing felt assembly 32. The bottom of the oil-absorbing felt assembly 32 is connected to the sealing plate 4 via the bottom-stamped C-ring 33, and an annular sealing strip 34 is provided between them. The bottom-stamped C-ring 33 is provided with an oil drain hole 331, which is generally located near the inner ring of the C-ring, that is, near the side close to the loose-textured felt 322, because more filtered oil mist falls off on this side. The oil-absorbing felt assembly 32 is also fixed by a spiral strap 325, and the lower part of the oil-absorbing felt assembly 32 is fixed by the bottom-stamped C-ring 33. Example

[0033] The structure of Example 4 is similar to that of Example 1, except that an inspection door 8 is provided on the housing 1 on one side of the oil-absorbing felt assembly 32, and the exhaust device 2 is a fan. The fan is located on the top of the housing and communicates with the inside of the housing 1. The fan is located on the housing 1 on one side of the oil-absorbing felt assembly 32 so that the gas can leave the housing 1 directly after being filtered by the oil-absorbing felt assembly 32. The oil outlet device is a siphon pipe 7, which is located near the bottom of the housing 1 and communicates with the housing 1. Specifically, a bottom plate 10 is also provided inside the housing 1, and the horizontal height of the bottom plate 10 is lower than that of the air inlet 6. The inlet end of the siphon pipe 7 communicates with the inside of the housing 1 above the bottom plate 10, and the outlet end of the siphon pipe 7 is lower than the inlet end and located outside the housing 1. The bottom of the siphon pipe 7 has a U-shaped structure. Example

[0034] The structure of Embodiment 5 is similar to that of Embodiment 3, except that the oil mist filter cartridge 3 is connected to the sealing plate 4 by a filter cartridge fastener 9. The filter cartridge fastener 9 is a hook. The hook portion 91 of the hook is connected to the hook strip 43 of the positioning ring 42. The rod portion 92 of the hook is connected to the top stamped cover plate 31 by threads. The top stamped cover plate 31 is completely sealed, thereby completing the connection between the sealing plate 4 and the oil mist filter cartridge 3. Since the sealing plate 4 is welded to the housing 1, the connection between the oil mist filter cartridge 3 and the housing 1 is also completed.

[0035] Assembly of the oil-absorbing felt assembly 32 and installation of the oil mist filter cartridge 3

[0036] The oil-absorbing felt assembly 32 of this invention is generally designed as a cylindrical filter cartridge structure with a hollow center. However, it can also be customized into a non-cylindrical shape, such as a columnar structure, according to different needs. In the actual assembly of the oil-absorbing felt assembly 32, a perforated cylindrical liner 321 is first used as the overall skeleton structure of the oil-absorbing felt assembly 32. The sparse felt 322, medium felt 323, and dense felt 324 are then fixed sequentially from the inside out onto the bottom stamped C-ring 33. Air is introduced from bottom to top with the air inlet facing downwards. The upper opening of the filter cartridge is sealed with a top stamped cover plate 31 (generally galvanized steel plate). The lower opening of the filter cartridge is connected and fixed to the bottom stamped C-ring 33. 33 is the C-shaped steel that is adapted to the bottom of the oil-absorbing felt assembly 32. The oil-absorbing felt assembly 32 can also be fixed to the upper and lower cover plates by oil-resistant adhesive to complete the connection. The outermost dense felt 324 is fixed by spiral straps 325, generally three spiral straps 325: upper, middle and lower. The oil-absorbing felt assembly 32 is equipped with filter cartridge fasteners 9 inside. The upper part of the filter cartridge fasteners 9 is connected to the top stamped cover plate 31, and the lower part is connected to the hook strip 43 of the positioning ring 42. Further, the oil-absorbing felt 32 is assembled into the housing 1, and the hook 91 is connected to the hook strip 43 of the positioning ring 42 of the sealing plate 4, thus completing the installation of the oil mist filter cartridge 3.

[0037] Working principle of the invention

[0038] When this invention is in operation, the gas to be processed is first introduced into the housing 1 through the air inlet 6. In a preferred embodiment, an air inlet baffle can also be provided on one side of the air inlet 6. The air inlet baffle performs preliminary inertial separation of the gas, which can pre-treat larger oil mist particles and block larger oil mist particles. Then the gas enters the housing 1 and enters the filter assembly for filtration. The filter assembly includes a demister plate 5 and an oil mist filter cartridge 3. The demister plate 5 is located between the air inlet 6 and the oil mist filter cartridge 3, which can perform initial filtration of the gas and block oil mist particles with a particle size larger than the demister plate 5. A sealing plate 4 is provided between the demister plate 5 and the bottom stamped C-ring 33. The sealing plate 4 has a sealing plate opening 41 at the position corresponding to the bottom stamped C-ring. Therefore, the gas filtered by the demister plate can directly enter the interior of the oil mist filter cartridge 3 through the sealing plate opening 41.

[0039] The gas passing through the demister plate 5 enters the oil mist filter cartridge 3 for three filtrations. The oil mist filter cartridge 3 adopts an inner air intake design. After the gas is introduced into the oil mist filter cartridge 3, it must exit the oil mist filter cartridge 3 through the oil-absorbing felt assemblies 32 on both sides. The oil-absorbing felt assemblies 32 adopt a multi-layer structure design, including a stamped mesh plate 33 (filter skeleton), a sparse felt 322, and a medium felt 323 arranged sequentially from the inside to the outside. The gas exiting through the dense felt 324 leaves the housing 1 through the exhaust device 2 (usually a fan), while the filtered oil mist falls to the bottom of the housing 1 due to gravity. The siphon pipe 7 can separate the oil that falls to the bottom plate 10 out of the housing 1, and discharge the filtered oil mist, completing the oil mist gas treatment. The maintenance door 8 located on one side of the oil mist filter cartridge 3 allows users to easily maintain the inside of the device.

[0040] The preferred embodiments of the present invention have been described above, but should not be construed as limiting the scope of the claims. The present invention is not limited to the above embodiments, and variations in its specific structure are permitted. All changes made within the scope of the independent claims of the present invention are within the scope of protection of the present invention.

Claims

1. An oil mist filtration device with an oil mist filter cartridge, characterized in that: The device includes a housing (1), an exhaust device (2), and an oil mist filter cartridge (3). The exhaust device (2) is located on the top of the housing (1) and is used to exhaust the gas inside the housing to the outside of the housing (1). An air inlet (6) is provided on the side of the housing and is located below the oil mist filter cartridge (3). A sealing plate (4) is provided inside the housing and a sealing plate opening (41) is provided on the sealing plate (4). The oil mist filter cartridge (3) is located above the sealing plate opening (41) and includes an annular sealing strip (34), a bottom stamped C-ring (33), an oil-absorbing felt assembly (32), and a top stamped cover plate (31) arranged sequentially from bottom to top. The annular sealing strip (34) is located between the bottom stamped C-ring (33) and the sealing plate (4). The sealing plate (4) is provided with a plurality of sealing plate openings (41), and the sealing plate (4) is circumferentially welded with a positioning ring (42) corresponding to the position of the sealing plate openings (41). The size and shape of the positioning ring (42) are adapted to the bottom stamped C-ring (33), and the positioning ring (42) is suitable for installing the oil mist filter cartridge (3). A hook strip (43) is welded on the positioning ring (42). The oil mist filter cartridge (3) is connected to the sealing plate (4) through a filter cartridge fastener (9). The filter cartridge fastener (9) is a hook. The hook part (91) of the hook hooks the hook strip (43). The rod part (92) of the hook is connected to the top stamped cover plate (31) through threads. The sealing plate (4) is a perforated plate.

2. The oil mist filtration device with an oil mist filter cartridge according to claim 1, characterized in that: The sealing plate (4) is welded to the side wall of the housing (1).

3. The oil mist filtration device with an oil mist filter cartridge according to claim 1, characterized in that: A demisting plate (5) is also provided between the sealing plate (4) and the air inlet (6).

4. The oil mist filtration device with an oil mist filter cartridge according to claim 1, characterized in that: The oil-absorbing felt assembly (32) includes, from the inside out, a cylindrical perforated plate liner (321), a loose felt (322), a medium felt (323), a dense felt (324), and an outermost spiral winding strap (325); the thickness of the loose felt (322), the medium felt (323), and the dense felt (324) decreases sequentially, the weaving density of the loose felt (322), the medium felt (323), and the dense felt (324) increases sequentially, and the thickness of the fibers of the loose felt (322), the medium felt (323), and the dense felt (324) decreases sequentially.

5. An oil mist filtration device with an oil mist filter cartridge according to claim 1, characterized in that: The housing (1) is provided with an inspection door (8), and the position of the inspection door (8) corresponds to that of the oil mist filter cartridge (3).

6. An oil mist filtration device with an oil mist filter cartridge according to claim 1, characterized in that: The housing (1) is also provided with a base plate (10) and a siphon tube (7), and the horizontal height of the base plate (10) is lower than that of the air inlet (6). The inlet end of the siphon tube (7) is connected to the base plate (10), and the outlet end of the siphon tube (7) is lower than the inlet end and extends out of the housing (1). The bottom of the siphon tube (7) is a U-shaped structure.

7. An oil mist filtration device with an oil mist filter cartridge according to claim 1, characterized in that: The bottom stamped C-ring (33) is provided with an oil drain hole (331).

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