Modified fiber oil removal filter

Abstract

The application relates to the technical field of filters, and provides a modified fiber oil removal filter, which is provided with a water inlet, a water outlet and a blowdown outlet on a shell, a support hole plate is arranged in the shell and used for supporting fiber filter material, a backwashing ring pipe is rotationally arranged above the support hole plate, the backwashing ring pipe is provided with a plurality of communication holes and a plurality of injection holes, the communication holes are used for being communicated with a backwashing gas supply pipe or a backwashing water supply pipe, the injection holes are used for spraying water flow or gas flow to the filter material, the backwashing gas supply pipe and the backwashing water supply pipe are arranged through the side wall of the shell, when the backwashing ring pipe rotates, the communication holes can be alternately communicated with the backwashing gas supply pipe and the backwashing water supply pipe, so that the backwashing ring pipe rotates and sprays the gas flow or the water flow from the injection holes at the same time, and the coverage range of the backwashing is increased. Through the technical scheme, the technical problem that the coverage range of the gas-water backwashing is limited and the backwashing effect is uneven in the related art is solved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of filter technology, and more specifically, to a modified fiber oil removal filter. Background Technology

[0002] In today's context of industrial production and water resource protection, the rational utilization of water resources and wastewater treatment are of paramount importance. As a solid-liquid separation device, filters play an indispensable role in wastewater treatment, serving as one of the most effective means of removing suspended solids from water. They are widely used in key stages such as advanced wastewater treatment, wastewater reuse, and water supply treatment. Through the interception, sedimentation, and adsorption effects of filter media, filters achieve water purification, which is of great significance for improving water quality and meeting standards for domestic and industrial water use. They are core equipment in the wastewater / circulating water treatment industry, and their performance directly determines the quality of the treated water.

[0003] For the treatment of existing industrial circulating water containing oil and suspended solids, commonly used filter types mainly include high-speed quartz sand filters, walnut shell filters, and fiber ball / fiber bundle filters. Under normal conditions, these filtration devices can meet the basic treatment requirements of industrial circulating water to a certain extent and play an important role in industrial production.

[0004] During use, as filtration time increases, suspended solids and oil in the wastewater accumulate on the surface of the filter media. At this point, backwashing is necessary to remove these solids and oil. Most existing backwashing methods involve injecting backwash water through a baffle plate at the bottom of the filter interior. The backwash water then enters the bottom of the filter media layer through nozzles located on the baffle plate, creating a turbulent backwashing effect. This backwashing method relies primarily on the scouring action of water flow, resulting in low backwashing efficiency, poor backwashing effect, long backwashing time, high water consumption, and significant filter media loss.

[0005] In addition, some traditional technologies incorporate filters with backwash air-cloth pipe structures. By separating the backwash water pipes and the backwash air pipes, the two sets of pipes are controlled to operate alternately during rinsing, achieving an alternating air-water backwashing effect. However, in actual use, on the one hand, the separate pipe sets increase the space occupied by the backwash structure; on the other hand, although alternating air-water backwashing is achieved, the coverage area of ​​the pipes remains fixed and limited, making it difficult to achieve uniform air and water flow backwashing to all parts of the filter media, resulting in poor backwashing effect.

[0006] In conclusion, developing a modified fiber oil filter with a wide coverage area and uniform backwashing effect is of paramount importance. Summary of the Invention

[0007] To overcome the above-mentioned defects, embodiments of the present invention provide a modified fiber oil removal filter, which solves the technical problems of limited air-water backwashing coverage and uneven backwashing effect in related technologies.

[0008] According to one aspect, at least one embodiment of the present invention provides a modified fiber oil removal filter, comprising a housing, a support perforated plate, a backwash ring pipe, a backwash air supply pipe, and a backwash water supply pipe. The housing has an inlet, an outlet, and a drain outlet. The support perforated plate is disposed within the housing and is used to support the fiber filter media. The backwash ring pipe is rotatably disposed above the support perforated plate. The backwash ring pipe has a connecting hole and a spray hole. The connecting hole is used to communicate with the backwash air supply pipe or the backwash water supply pipe. The spray hole has a plurality of holes and is used to spray water or air onto the filter media. The backwash air supply pipe and the backwash water supply pipe are both disposed through the side wall of the housing. When the backwash ring pipe rotates, the connecting hole can alternately communicate with the backwash air supply pipe and the backwash water supply pipe, so that the spray hole can alternately spray backwash air and backwash water onto the filter media above.

[0009] For example, a modified fiber degreasing filter provided in at least one embodiment of the present invention further includes: The backwash ring tube has a circumferentially extending communication notch on its peripheral wall, and a communication ring plate for sealing the communication notch is rotatably disposed inside the backwash ring tube, with the communication hole disposed on the communication ring plate. The connecting hole can alternately connect with the backwash air supply pipe and the backwash water supply pipe under the rotation of the backwash ring pipe, and slide within the connecting notch, so that the backwash ring pipe maintains its connection with the backwash air supply pipe or the backwash water supply pipe while rotating.

[0010] For example, a modified fiber degreasing filter provided in at least one embodiment of the present invention further includes: Both sides of the housing are provided with radially penetrating guide sleeves. The backwash air supply pipe and the backwash water supply pipe are slidably disposed in the two guide sleeves in a one-to-one correspondence. A first spring is sleeved on the backwash air supply pipe. The two ends of the first spring act on the backwash air supply pipe and the outer wall of the housing respectively, to provide a force for the backwash air supply pipe to approach the backwash ring pipe, so that when the connecting hole moves closer to the backwash air supply pipe, it can communicate with the backwash air supply pipe. A second spring is fitted onto the backwash water supply pipe. The two ends of the second spring act on the backwash water supply pipe and the outer wall of the housing, respectively, to provide a force for the backwash water supply pipe to approach the backwash ring pipe, so that the connecting hole can communicate with the backwash water supply pipe when it moves to the backwash water supply pipe.

[0011] For example, a modified fiber degreasing filter provided in at least one embodiment of the present invention further includes: The inner wall of the connecting ring plate is provided with two support plates, which are respectively located on both sides of the connecting hole. The inner wall of the backwash ring pipe is provided with two limit blocks, which are respectively located at both ends of the connecting gap. The two limit blocks are respectively used to abut against the two support plates to limit the sliding range of the connecting ring plate.

[0012] For example, a modified fiber degreasing filter provided in at least one embodiment of the present invention further includes: The connecting ring plate is provided with a positive magnetic attractor located on the outer periphery of the connecting hole. The outlet ends of the backwash air supply pipe and the backwash water supply pipe are both provided with negative magnetic attractors for attracting the positive magnetic attractor. An elastic element is connected between the connecting ring plate and the backwash ring pipe. The elastic element is used to elastically pull the connecting ring plate to slide until one of the support plates abuts against the corresponding limiting block, so that the connecting hole is located at one end of the connecting gap.

[0013] For example, a modified fiber degreasing filter provided in at least one embodiment of the present invention further includes: A sliding rod is slidably disposed through the top wall of the housing. The sliding rod has a locking hole. A locking member is slidably disposed on the top wall of the housing. The locking member is used to insert into the locking hole to lock the sliding rod. A pressing member is disposed at the bottom of the sliding rod. The locking member is used to release the locking of the sliding rod during backwashing so that the pressing member moves down and presses onto the filter media to limit the floating of the filter media.

[0014] For example, a modified fiber degreasing filter provided in at least one embodiment of the present invention further includes: A rotating shaft is rotatably mounted through the center of the support plate. A bracket is mounted on the top of the rotating shaft. The backwash ring pipe is detachably mounted on the outer periphery of the bracket. The bottom of the rotating shaft has a mounting groove. A drive shaft is rotatably mounted through the bottom wall of the housing. A mounting block is mounted on the top of the drive shaft. The mounting block is used to engage with the mounting groove. The drive shaft is driven to rotate by a drive element mounted outside the housing.

[0015] For example, a modified fiber degreasing filter provided in at least one embodiment of the present invention further includes: The backwash ring tube includes two interlocking halves, and the housing includes two interlocking halves.

[0016] For example, a modified fiber degreasing filter provided in at least one embodiment of the present invention further includes: The upper and lower edges of the connecting ring plate are both provided with guide portions, and the inner wall of the backwash ring pipe is provided with two guide grooves that are spaced apart vertically and extend circumferentially. The guide portions and the guide grooves are slidably engaged in a one-to-one correspondence.

[0017] For example, a modified fiber degreasing filter provided in at least one embodiment of the present invention further includes: The housing is provided with a water distribution ring pipe, which is connected to the water inlet and located above the support orifice plate. The water distribution ring pipe is provided with a plurality of nozzles along the circumferential direction for spraying water onto the filter media.

[0018] The beneficial effects of the embodiments of the present invention are as follows: In this invention, during the normal filtration stage, the drain outlet is closed, while the inlet and outlet are open. Industrial turbid circulating water containing oil and suspended solids flows into the housing through the inlet. Under the interception, sedimentation, and adsorption effects of the fiber filter media, the suspended solids and oil in the water are filtered out, and the clean water flows out through the small holes in the support plate, completing the filtration process.

[0019] After the filter has been running for a period of time, a significant amount of suspended solids and oil accumulates on the surface of the filter media, requiring backwashing. At this point, close the inlet and outlet water ports and initiate the backwashing process. First, the backwash ring pipe rotates to connect with the backwash water supply pipe. Water from the backwash water supply pipe enters the backwash ring pipe and is sprayed from the nozzles onto the upper filter media layer, flushing the media. After a certain period of water rinsing, the backwash ring pipe rotates to connect with the backwash air supply pipe. Gas enters the backwash ring pipe and is ejected from the nozzles, forming a backwash airflow. This airflow creates bubbling and flotation in the water, causing the filter media to tumble and carry away particles adsorbed on the micropores. Simultaneously, the vortex formed within the housing ensures uniform agitation of the entire filter media, reducing backwashing dead zones. The synergistic effect of alternating air and water rinsing improves the efficiency of contaminant removal. After backwashing is complete, open the drain valve to discharge the wastewater containing impurities from the housing.

[0020] By using alternating air and water backwashing, the scouring effect of water flow and the agitation effect of airflow are fully utilized, which improves the removal efficiency of pollutants, reduces water consumption, and shortens the backwashing time accordingly. This improves the overall operating efficiency of the filter and reduces the frequency of filter media replacement.

[0021] Compared to the traditional air-water alternating flushing structure, this solution integrates the backwash water pipe and the backwash air pipe into a backwash ring pipe, reducing the extra space occupied by setting up two separate sets of pipes and avoiding the problem of increasing the overall size of the filter. On the other hand, during backwashing, by driving the rotation of the backwash ring pipe, it can be alternately connected with the backwash water supply pipe and the backwash air supply pipe, thereby achieving the effect of the backwash ring pipe rotating while spraying air or water from the spray holes, increasing the coverage of backwashing, allowing the air or water to be fully distributed to different positions of the filter media, further reducing backwashing dead zones, and making the backwashing effect more uniform. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of the present invention and these drawings without any creative effort.

[0023] Figure 1 This is a schematic diagram of the external appearance of a modified fiber oil removal filter according to one embodiment of the present invention; Figure 2 for Figure 1 A schematic diagram of the internal structure of a modified fiber oil removal filter in one embodiment; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 for Figure 1 A schematic diagram of the internal structure of the housing in the embodiment; Figure 5 for Figure 4 Enlarged view at point B in the middle; Figure 6 for Figure 1 A schematic diagram of the backwash loop in the embodiment; Figure 7 for Figure 1 A schematic diagram of the exploded structure of the backwash loop in the embodiment; Figure 8 for Figure 1 A schematic diagram of the structure when the connecting hole is located at one end of the connecting gap in the embodiment; Figure 9 for Figure 1 A schematic diagram of the structure when the connecting hole is located at the other end of the connecting gap in the embodiment; Figure 10 for Figure 1 A schematic diagram of the structure of the connecting ring plate after sliding and resetting under the action of the elastic element in the embodiment; Figure 11 for Figure 8 Enlarged view of point C in the middle.

[0024] In the diagram: 1. Shell, 2. Support plate, 3. Backwash ring pipe, 4. Backwash air supply pipe, 5. Backwash water supply pipe, 101. Inlet, 102. Outlet, 103. Drain, 301. Spray hole, 302. Connecting notch, 6. Connecting ring plate, 601. Connecting hole, 7. Guide sleeve, 8. First spring, 9. Second spring, 10. Positive magnetic attractant, 11. Negative magnetic attractant, 603. Elastic component, 303. Guide slope, 604. Support plate, 304. Limiting block, 12. Slide rod, 1201. Locking hole, 13. Lock, 14. Pressing component, 15. Rotating shaft, 16. Bracket, 1501. Mounting groove, 17. Drive shaft, 1701. Mounting block, 602. Guide section, 305. Guide groove, 18. Water distribution ring pipe, 1801. Spray nozzle. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it.

[0026] To keep the drawings concise, each drawing only schematically shows the parts relevant to the invention; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0027] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to 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 the present invention.

[0030] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] like Figures 1-11 The diagram illustrates a modified fiber oil filter according to an embodiment of the present invention, comprising a housing 1, a support perforated plate 2, a backwash ring pipe 3, a backwash air supply pipe 4, and a backwash water supply pipe 5. The housing 1 is the main structure of the entire filter, and is provided with an inlet 101, an outlet 102, and a drain outlet 103. The inlet 101 is located at the top of one side of the housing 1 and is used to introduce industrial turbid circulating water containing oil and suspended solids to be treated. The outlet 102 is located at a lower position on the other side of the housing 1, allowing filtered clean water to flow out. The drain outlet 103 is located at the bottom of the side of the housing 1 and is used to discharge wastewater generated during the backwashing process. These openings are equipped with corresponding valves to control their opening and closing. The support perforated plate 2 is disposed inside the housing 1 and serves to support the fiber filter media. The support perforated plate 2 is a circular metal plate. Numerous small holes are evenly distributed on the support perforated plate 2 to allow water to pass through. The backwash ring pipe 3 is annular and rotatably mounted on the support perforated plate 2. A ring of spray holes 301 is evenly distributed around the circumference of the backwash ring pipe 3. The spray holes 301 are inclined so that during backwashing, the air or water jets ejected from the spray holes 301 can form a vortex within the housing 1, causing the filter media to be uniformly agitated. The backwash air supply pipe 4 and the backwash water supply pipe 5 are both inserted through the side wall of the housing 1. The backwash air supply pipe 4 is connected to an external air source device, such as an air compressor, to provide air to the backwash ring pipe 3; the backwash water supply pipe 5 is connected to an external water source to provide backwash water to the backwash ring pipe 3.

[0032] Working principle: During the normal filtration stage, the drain outlet 103 is closed, while the inlet 101 and outlet 102 are open. Industrial turbid circulating water containing oil and suspended solids flows into the housing 1 through the inlet 101. Under the interception, sedimentation, and adsorption of the fiber filter media, the suspended solids and oil in the water are filtered out, and the clean water flows out through the small holes of the support plate 2 from the outlet 102, completing the filtration process.

[0033] After the filter has been running for a period of time, a significant amount of suspended solids and oil accumulates on the surface of the filter media, necessitating backwashing. At this time, the inlet 101 and outlet 102 are closed, and the backwashing process is initiated. First, the backwash ring pipe 3 is rotated to connect with the backwash water supply pipe 5. Water from the backwash water supply pipe 5 enters the backwash ring pipe 3 and is sprayed from the spray nozzle 301 onto the upper filter media layer, flushing the filter media. After a certain period of water flushing, the backwash ring pipe 3 is rotated to connect with the backwash air supply pipe 4. Gas enters the backwash ring pipe 3 and is ejected from the spray nozzle 301, forming a backwash airflow. This airflow creates a bubbling and flotation phenomenon in the water, causing the filter media to tumble and carry away particles adsorbed on the micropores of the filter media. Simultaneously, the vortex formed within the housing 1 ensures uniform agitation of the entire filter media, reducing backwashing dead zones. The synergistic effect of alternating air and water flushing improves the efficiency of pollutant removal. After backwashing is complete, the valve of the drain outlet 103 is opened to discharge the wastewater containing impurities from the housing 1.

[0034] By using alternating air and water backwashing, the scouring effect of water flow and the agitation effect of air flow are fully utilized, which improves the removal efficiency of pollutants, reduces water consumption, and shortens the backwashing time accordingly. This improves the overall operating efficiency of the filter and reduces the frequency of filter media replacement.

[0035] Compared with the traditional air-water alternating flushing structure, this solution integrates the backwash water pipe and the backwash air pipe into a backwash ring pipe 3, reducing the extra space occupied by setting up two sets of pipes separately and avoiding the problem of increasing the overall volume of the filter. On the other hand, during backwashing, by driving the rotation of the backwash ring pipe 3, it can be alternately connected with the backwash water supply pipe 5 and the backwash air supply pipe 4, thereby achieving the effect of the backwash ring pipe 3 rotating while spraying air or water from the spray hole 301, increasing the coverage of backwashing, allowing the air or water to be fully distributed to different positions of the filter media, further reducing backwashing dead zones, and making the backwashing effect more uniform.

[0036] In some examples, such as Figure 3 ,as well as Figures 5-11 As shown, a connecting notch 302 is provided circumferentially on the outer sidewall of the backwash ring pipe 3, providing a channel for alternating connection between the backwash ring pipe 3 and the backwash air supply pipe 4 and the backwash water supply pipe 5. A connecting ring plate 6 is rotatably installed on the inner wall of the backwash ring pipe 3, which can block the connecting notch 302. A connecting hole 601 is provided on the connecting ring plate 6, which is used to alternately connect with the backwash air supply pipe 4 and the backwash water supply pipe 5, and slides within the range of the connecting notch 302.

[0037] Guide sleeves 7 are radially inserted through the side walls of the housing 1. The backwash air supply pipe 4 and the backwash water supply pipe 5 are slidably disposed within these two guide sleeves 7, one for each. The guide sleeves 7 provide guidance for the backwash air supply pipe 4 and the backwash water supply pipe 5. A first spring 8 is fitted onto the backwash air supply pipe 4, with its two ends acting on the backwash air supply pipe 4 and the outer wall of the housing 1, respectively. Similarly, a second spring 9 is fitted onto the backwash water supply pipe 5, with its two ends acting on the backwash water supply pipe 5 and the outer wall of the housing 1, respectively. The two springs provide a force to the backwash air supply pipe 4 and the backwash water supply pipe 5 to bring them close to the backwash ring pipe 3, ensuring that under normal conditions, the openings of the backwash air supply pipe 4 and the backwash water supply pipe 5 can abut against the outer wall of the backwash ring pipe 3, providing a certain degree of sealing and preventing large-scale leakage of gas and water.

[0038] A positive magnetic attractor 10 is arranged around the connecting hole 601 on the connecting ring plate 6. Simultaneously, a negative magnetic attractor 11 is arranged at the ends of both the backwash air supply pipe 4 and the backwash water supply pipe 5. An elastic element 603, preferably an elastic rope or a spring, connects the connecting ring plate 6 and the inner wall of the backwash ring pipe 3. Two support plates 604 are arranged on the inner wall of the connecting ring plate 6, located on either side of the connecting hole 601. Two limit blocks 304 are arranged on the inner wall of the backwash ring pipe 3, located at both ends of the connecting notch 302. The two support plates 604 abut against the limit blocks 304 at both ends to limit the sliding range of the connecting ring plate 6. Regarding the installation method of the elastic element 603, taking an elastic rope as an example, hanging rings are designed at both ends of the elastic rope, and the hanging rings at both ends are hung on the support plates 604 on the inner wall of the connecting ring plate 6 and the positioning posts on the inner wall of the backwash ring pipe 3, respectively.

[0039] The elastic element 603 provides a sliding force for the connecting ring plate 6, causing the support plate 604 on one side of the connecting hole 601 to abut against the limiting block 304 on that side, so that the connecting hole 601 is initially located at the end of the connecting notch 302. Guide slopes 303 are designed at both ends of the connecting notch 302 so that the pipe opening of the backwash air supply pipe 4 or the backwash water supply pipe 5 is separated from the connecting hole 601 and re-attached to the outer wall of the backwash ring pipe 3.

[0040] Working principle: When the backwash ring pipe 3 is not connected to the backwash air supply pipe 4 or the backwash water supply pipe 5, the first spring 8 and the second spring 9 respectively cause the pipe openings of the backwash air supply pipe 4 and the backwash water supply pipe 5 to abut against the outer wall of the backwash ring pipe 3, maintaining a certain degree of sealing and preventing large-scale leakage of gas or water. Figure 8 As shown, at this time, under the action of the elastic element 603, the connecting ring plate 6 makes the connecting hole 601 located at one end of the connecting notch 302.

[0041] As the backwash ring pipe 3 rotates, the connecting notch 302 gradually rotates to the position of the backwash water supply pipe 5. Due to the action of the second spring 9, the inlet of the backwash water supply pipe 5 enters the connecting notch 302. Because the connecting hole 601 is initially located at the end of the connecting notch 302, when the backwash water supply pipe 5 enters the connecting notch 302, the negative magnetic attraction element 11 at the end of the backwash water supply pipe 5 can attract each other with the positive magnetic attraction element 10 around the connecting hole 601, thus achieving connection, thereby connecting the backwash water supply pipe 5 with the connecting hole 601. At this time, the spray hole 301 on the backwash ring pipe 3 sprays backwash water flow towards the filter media layer above, starting to rinse the filter media with water.

[0042] As the backwash ring pipe 3 continues to rotate, the connecting ring plate 6 will not rotate with the backwash ring pipe 3 under the attraction of the magnetic attraction component, thus maintaining the connection between the connecting hole 601 and the backwash water supply pipe 5. Meanwhile, the elastic element 603 is stretched, and the connecting hole 601 moves along the connecting notch 302 during this process. Because of the magnetic attraction component, the backwash water supply pipe 5 remains connected to the connecting hole 601, thereby achieving the effect of supplying water to the filter media while the backwash ring pipe 3 rotates.

[0043] like Figure 9 As shown, when the connecting hole 601 moves to the other end of the connecting notch 302, the support plate 604 on one side of the connecting hole 601 abuts against the corresponding limiting block 304, preventing the connecting ring plate 6 from sliding further. Simultaneously, the inlet of the backwash water supply pipe 5 abuts against the guide slope 303 at the end of the connecting notch 302. Under the guidance of the guide slope 303, the inlet of the backwash water supply pipe 5 gradually separates from the connecting hole 601. Under the action of the second spring 9, the inlet of the backwash water supply pipe 5 abuts against the outer wall of the backwash ring pipe 3 again. Meanwhile, as... Figure 10 As shown, the connecting ring plate 6 slides back to its original position under the action of the elastic element 603, so that the support plate 604 on the other side of the connecting hole 601 abuts against the corresponding limiting block 304, thereby returning the connecting hole 601 to the initial position at one end of the connecting notch 302, waiting to be connected to the backwash air supply pipe 4 next.

[0044] As the backwash ring pipe 3 continues to rotate, the connecting notch 302 rotates to the position of the backwash air supply pipe 4, and the above process is repeated, so that the backwash ring pipe 3 rotates while spraying backwash airflow into the filter media layer, and finally realizes air-water alternating backwashing.

[0045] The backwash loop 3 can achieve alternating air and water backwashing while rotating, allowing the backwash airflow and backwash water flow to act more evenly and comprehensively on the filter media layer, reducing dead zones during the backwashing process and improving the backwashing effect. The backwash loop 3 can automatically achieve alternating connection with the backwash air supply pipe 4 and the backwash water supply pipe 5 through rotation, without the need for a complex control system to frequently control the rotation and stop of the backwash loop 3 to achieve alternating connection.

[0046] In some examples, such as Figure 1 and Figure 2 As shown, a sliding rod 12 slides through the top wall of the housing 1. A locking hole 1201 is machined on the sliding rod 12. A locking member 13 is slidably disposed on the top wall of the housing 1, corresponding to the locking hole 1201 of the sliding rod 12. A pressure member 14 is installed at the bottom of the sliding rod 12.

[0047] Working principle: During normal filtration, the slide bar 12 is locked to the top of the housing 1 by inserting the locking member 13 into the locking hole 1201. At this time, the pressure member 14 is located at the top of the housing 1 and will not obstruct the normal filtration process.

[0048] When the filter needs backwashing, the locking member 13 is pulled out of the locking hole 1201 of the slide rod 12, releasing the lock on the slide rod 12. Under the action of gravity, the press material is pressed to the top of the filter media layer. Under the bubbling and flotation effect formed by the backwash airflow, the filter media will float up and down in the backwash water. The pressing member 14 prevents the filter media from protruding excessively out of the backwash water, ensuring that the filter media can fully contact the backwash water and ensure the backwashing effect. At the same time, since the pressing member 14 has vertical freedom after the slide rod 12 is unlocked, the floating of the filter media will also cause the pressing member 14 to float to a certain extent, so that the pressing member 14 will not excessively restrict the normal floating space of the filter media, ensuring that the filter media can tumble normally.

[0049] In some examples, such as Figure 1 and Figure 2As shown, the housing 1 is designed with a two-part interlocking structure, with the two halves connected by flanges, facilitating the installation and maintenance of the internal components of the filter. A rotating shaft 15 is installed through the center of the support plate 2, allowing it to rotate on the support plate 2. A bracket 16 is mounted on the top of the rotating shaft 15, supporting the backwash ring tube 3. The backwash ring tube 3 consists of two interlocking halves, facilitating the installation of the internal connecting hole 601 plate. During installation, the connecting ring plate 6 is first placed inside one half of the backwash ring tube 3, and the two ends of the elastic element 603 are connected to the connecting ring plate 6 and the inner wall of the backwash ring tube 3, respectively. Then, the other half of the backwash ring tube 3 is interlocked and connected together with bolts to complete the assembly of the backwash ring tube 3. In addition, the backwash ring tube 3 is detachably installed on the bracket 16, also using bolt connections, for easy maintenance or replacement. A drive shaft 17 is rotatably installed through the bottom wall of the housing 1, driven by a motor installed at the bottom of the housing 1. The top of the drive shaft 17 has a mounting block 1701, and the bottom of the rotating shaft 15 is correspondingly provided with a mounting groove 1501. When installing the rotating shaft 15, it is inserted through the center of the support plate 2, so that the mounting groove 1501 is engaged with the mounting block 1701, thereby realizing the power transmission between the rotating shaft 15 and the drive shaft 17. This assembly method makes the installation sequence of each component clear, the operation simple, and reduces the assembly difficulty.

[0050] In some examples, such as Figure 1 , Figure 3 and Figure 5 As shown, a guide portion 602 is provided circumferentially on the connecting ring plate 6, and a guide groove 305 is machined circumferentially on the inner wall of the backwash ring pipe 3. The shape of the guide groove 305 matches the guide portion 602. The water distribution ring pipe 18 is disposed inside the housing 1, above the filter media layer, and is connected to the water inlet 101. Multiple nozzles 1801 are evenly arranged circumferentially on the water distribution ring pipe 18.

[0051] When the connecting ring plate 6 slides within the backwash ring pipe 3, the guide part 602 can slide along the guide groove 305, improving the stability of the connecting ring plate 6 sliding within the backwash ring pipe 3. The incoming wastewater can be evenly distributed through the water distribution ring pipe 18 before being sprayed onto the lower filter media layer, ensuring uniform contact between the wastewater and the filter media layer, thereby guaranteeing filtration efficiency and the utilization rate of the filter media layer.

[0052] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A modified fiber oil removal filter, characterized in that, The system includes a housing (1), a support perforated plate (2), a backwash ring pipe (3), a backwash air supply pipe (4), and a backwash water supply pipe (5). The housing (1) has an inlet (101), an outlet (102), and a drain outlet (103). The support perforated plate (2) is located inside the housing (1) and is used to support the fiber filter media. The backwash ring pipe (3) is rotatably located above the support perforated plate (2). The backwash ring pipe (3) has a connecting hole (601) and a spray hole (301). The connecting hole (601) is used for... The spray hole (301) is provided with several holes and is used to spray water or air onto the filter media. The backwash air supply pipe (4) and the backwash water supply pipe (5) are both arranged through the side wall of the housing (1). When the backwash ring pipe (3) rotates, the connecting hole (601) can alternately connect with the backwash air supply pipe (4) and the backwash water supply pipe (5) so that the spray hole (301) can alternately spray backwash air and backwash water onto the filter media above. The backwash ring pipe (3) has a circumferentially extending communication notch (302) on its peripheral wall. A communication ring plate (6) for sealing the communication notch (302) is rotatably arranged inside the backwash ring pipe (3). The communication hole (601) is arranged on the communication ring plate (6). The inner wall of the connecting ring plate (6) is provided with a support plate (604). There are two support plates (604) and they are located on both sides of the connecting hole (601). The inner wall of the backwash ring pipe (3) is provided with a limiting block (304). There are two limiting blocks (304) and they are located at both ends of the connecting gap (302). The two limiting blocks (304) are used to abut against the two support plates (604) to limit the sliding range of the connecting ring plate (6). The connecting ring plate (6) is provided with a positive magnetic attractor (10) located on the outer periphery of the connecting hole (601). The outlet ends of the backwash air supply pipe (4) and the backwash water supply pipe (5) are provided with negative magnetic attractors (11) for attracting the positive magnetic attractor (10). An elastic member (603) is connected between the connecting ring plate (6) and the backwash ring pipe (3). The elastic member (603) is used to elastically pull the connecting ring plate (6) to slide until one of the support plates (604) abuts against the corresponding limiting block (304), so that the connecting hole (601) is located at one end of the connecting notch (302).

2. The modified fiber oil removal filter according to claim 1, characterized in that, The connecting hole (601) can alternately connect with the backwash air supply pipe (4) and the backwash water supply pipe (5) under the rotation of the backwash ring pipe (3) and slide in the connecting notch (302) so that the backwash ring pipe (3) can maintain its connection with the backwash air supply pipe (4) or the backwash water supply pipe (5) while rotating.

3. The modified fiber oil-removing filter according to claim 2, characterized in that, Both sides of the housing (1) are provided with radially penetrating guide sleeves (7). The backwash air supply pipe (4) and the backwash water supply pipe (5) are slidably arranged in the two guide sleeves (7) in a one-to-one correspondence. A first spring (8) is sleeved on the backwash air supply pipe (4). The two ends of the first spring (8) act on the backwash air supply pipe (4) and the outer wall of the housing (1) respectively, to provide the backwash air supply pipe (4) with force to approach the backwash ring pipe (3), so that when the connecting hole (601) moves close to the backwash air supply pipe (4), it can communicate with the backwash air supply pipe (4). A second spring (9) is fitted on the backwash water supply pipe (5). The two ends of the second spring (9) act on the backwash water supply pipe (5) and the outer wall of the housing (1) respectively, to provide the backwash water supply pipe (5) with force to approach the backwash ring pipe (3), so that the connecting hole (601) can communicate with the backwash water supply pipe (5) when it moves to the backwash water supply pipe (5).

4. The modified fiber oil-removing filter according to claim 1, characterized in that, A sliding rod (12) is slidably disposed through the top wall of the housing (1). The sliding rod (12) has a locking hole (1201). A locking member (13) is slidably disposed on the top wall of the housing (1). The locking member (13) is used to insert into the locking hole (1201) to lock the sliding rod (12). A pressing member (14) is disposed at the bottom of the sliding rod (12). The locking member (13) is used to release the locking of the sliding rod (12) during backwashing so that the pressing member (14) moves down and presses onto the filter material to limit the floating of the filter material.

5. A modified fiber oil removal filter according to claim 2, characterized in that, A rotating shaft (15) is rotatably disposed through the center of the support plate (2). A bracket (16) is mounted on the top of the rotating shaft (15). The backwash ring pipe (3) is detachably disposed on the outer periphery of the bracket (16). The bottom of the rotating shaft (15) has a mounting groove (1501). A drive shaft (17) is rotatably disposed through the bottom wall of the housing (1). The top of the drive shaft (17) has a mounting block (1701). The mounting block (1701) is used to engage with the mounting groove (1501). The drive shaft (17) is driven to rotate by a drive element installed outside the housing (1).

6. A modified fiber oil-removing filter according to claim 2, characterized in that, The backwash ring tube (3) includes two interlocking halves, and the housing (1) includes two interlocking halves.

7. A modified fiber oil-removing filter according to claim 2, characterized in that, The upper and lower edges of the connecting ring plate (6) are both provided with guide portions (602), and the inner wall of the backwash ring pipe (3) is provided with two guide grooves (305) that are spaced apart vertically and extend circumferentially. The guide portions (602) and the guide grooves (305) are slidably fitted in correspondence.

8. A modified fiber oil-removing filter according to claim 1, characterized in that, The housing (1) is provided with a water distribution ring pipe (18), which is connected to the water inlet (101) and located above the support plate (2). The water distribution ring pipe (18) is provided with a plurality of nozzles (1801) for spraying water onto the filter media along the circumferential direction.

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