Modified fiber oil removal filter

Abstract

The invention relates to the technical field of filters, and provides a modified fiber oil removal filter, a shell is provided with a water inlet, a water outlet and a drain outlet, a support pore plate is arranged in the shell and is used for bearing a fiber filter material, a backwashing ring pipe is rotatably arranged above the support pore plate, a communication hole and a jet hole are formed in the backwashing ring pipe, and the jet hole is communicated with the support pore plate. The communicating holes are used for being communicated with a backwashing air supply pipe or a backwashing water supply pipe, the spraying holes are used for spraying water flow or air flow to the filter material, the backwashing air supply pipe and the backwashing water supply pipe are arranged in a manner of penetrating through the side wall of the shell, and when the backwashing ring pipe rotates, the communicating holes can be alternately communicated with the backwashing air supply pipe and the backwashing water supply pipe; therefore, the backwashing ring pipe rotates and sprays air flow or water flow from the spraying holes at the same time, and the backwashing coverage range is enlarged. By means of the technical scheme, the technical problems that in the prior art, the air-water backwashing coverage range is limited, and the backwashing effect is uneven are solved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of filters, and in particular, to a modified fiber oil removal filter. Background Art

[0002] In today's context of industrial production and water resource conservation, the rational utilization of water resources and wastewater treatment are crucial. Filters, as solid-liquid separation equipment, play an indispensable role in wastewater treatment and are one of the most effective means of removing suspended solids from water. They are widely used in key processes such as advanced wastewater treatment, wastewater reuse, and water treatment. Through the interception, sedimentation, and adsorption of filter media, filters purify water, playing a crucial role in improving water quality and meeting standards for both industrial and domestic use. They are core equipment in the wastewater / circulating water treatment industry, and their performance directly determines the quality of treated water.

[0003] For the treatment of turbid industrial circulating water containing oil and suspended solids, commonly used filter types include quartz sand high-speed 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 matter and oil in the wastewater accumulate on the filter media surface. Backwashing is necessary to remove these suspended matter and oil. Existing filter backwashing methods typically inject backwash water through a baffle below the filter. This backwash water then flows through a filter nozzle on the baffle into the bottom of the filter media layer, performing a tumbling backwash. This backwashing method primarily relies on the flushing action of water flow, resulting in low backwash efficiency, poor results, long backwash times, and high water consumption. This also significantly increases the risk of filter media loss.

[0005] Traditional filters also incorporate a backwashing air-cloth structure. By separating the backwashing water and air lines, these two sets of lines are controlled to operate alternately during flushing, achieving an alternating air-water backwash effect. However, in actual use, the two separate sets of lines increase the space occupied by the backwashing structure. Furthermore, while alternating air-water backwashing is achieved, the coverage area of ​​the lines remains fixed and limited, making it difficult to evenly backwash all locations of the filter media with air and water, resulting in poor backwashing results.

[0006] In summary, it is urgent to develop a modified fiber oil removal filter with a wide coverage area and uniform backwashing effect. Summary of the Invention

[0007] To overcome the above-mentioned defects, an embodiment of the present invention provides a modified fiber oil removal filter, which solves the technical problems in the related art of limited air-water backwash coverage and uneven backwash effect.

[0008] According to one aspect, at least one embodiment of the present invention provides a modified fiber oil removal filter, comprising a shell, a supporting orifice plate, a backwash ring pipe, a backwash air supply pipe and a backwash water supply pipe, the shell having a water inlet, a water outlet and a sewage outlet, the supporting orifice plate being arranged in the shell for supporting the fiber filter material, the backwash ring pipe being rotatably arranged above the supporting orifice plate, the backwash ring pipe being provided with a connecting hole and a spray hole, the connecting hole being used to connect with the backwash air supply pipe or the backwash water supply pipe, the spray holes being provided with a plurality of holes and being used to spray water flow or air flow toward the filter material, the backwash air supply pipe and the backwash water supply pipe both being arranged through the side wall of the shell, and when the backwash ring pipe rotates, the connecting hole can be alternately connected with the backwash air supply pipe and the backwash water supply pipe, so that the spray hole can alternately spray backwash air flow and backwash water flow toward the filter material above.

[0009] For example, at least one embodiment of the present invention provides a modified fiber oil removal filter, further comprising: A circumferentially extending communication gap is provided on the peripheral wall of the backwash ring pipe, a communication ring plate is rotatably provided in the backwash ring pipe for sealing the communication gap, and the communication hole is provided on the communication ring plate; The connecting hole can be alternately connected with the backwash air supply pipe and the backwash water supply pipe under the rotation of the backwash ring pipe, and slide in the connecting notch, so that the backwash ring pipe remains connected with the backwash air supply pipe or the backwash water supply pipe while rotating.

[0010] For example, at least one embodiment of the present invention provides a modified fiber oil removal filter, further comprising: Both sides of the shell are provided with radially penetrating guide sleeves, the backwash air supply pipe and the backwash water supply pipe are slidably arranged in the two guide sleeves in a one-to-one correspondence, and a first spring is sleeved on the backwash air supply pipe, and the two ends of the first spring act on the backwash air supply pipe and the outer wall of the shell respectively, so as to provide a force for the backwash air supply pipe to approach the backwash ring pipe, so that the communicating hole can be connected with the backwash air supply pipe when it moves close to the backwash air supply pipe; A second spring is sleeved on the backwash water supply pipe, and the two ends of the second spring act on the backwash water supply pipe and the outer wall of the shell respectively, for providing a force for the backwash water supply pipe to approach the backwash ring pipe, so that the connecting hole can be connected with the backwash water supply pipe when it moves to the backwash water supply pipe.

[0011] For example, at least one embodiment of the present invention provides a modified fiber oil removal filter, further comprising: A support plate is provided on the inner wall of the connecting ring plate, and there are two support plates respectively located on both sides of the connecting hole. A limit block is provided on the inner wall of the backwash ring pipe, and there are two limit blocks respectively located at both ends of the connecting notch. 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, at least one embodiment of the present invention provides a modified fiber oil removal filter, further comprising: The connecting ring plate is provided with a positive magnetic part located on the outer periphery of the connecting hole, and the outlet ends of the backwash air supply pipe and the backwash water supply pipe are both provided with negative magnetic parts for engaging with the positive magnetic part. An elastic part is connected between the connecting ring plate and the backwash ring pipe, and the elastic part is used to elastically pull the connecting ring plate to slide until one of the support plates abuts against the corresponding limit block, so that the connecting hole is located at one end of the connecting notch.

[0013] For example, at least one embodiment of the present invention provides a modified fiber oil removal filter, further comprising: A sliding rod is slidingly provided on the top wall of the shell, and a locking hole is provided on the sliding rod. A locking piece is slidingly provided on the top wall of the shell, and the locking piece is used to be inserted into the locking hole to lock the sliding rod. A pressing piece is provided at the bottom of the sliding rod, and the locking piece is used to release the lock of the sliding rod during backwashing, so that the pressing piece moves downward and presses onto the filter material to limit the floating of the filter material.

[0014] For example, at least one embodiment of the present invention provides a modified fiber oil removal filter, further comprising: A rotating shaft is rotatably provided through the center of the supporting orifice plate, a bracket is installed on the top of the rotating shaft, the backwash ring pipe is detachably provided on the outer periphery of the bracket, a mounting groove is provided at the bottom of the rotating shaft, a transmission shaft is rotatably provided through the bottom wall of the shell, a mounting block is provided on the top of the transmission shaft, the mounting block is used to engage with the mounting groove, and the transmission shaft is driven to rotate by a driving element installed outside the shell.

[0015] For example, at least one embodiment of the present invention provides a modified fiber oil removal filter, further comprising: The backwash ring pipe comprises an upper and lower half pipe that can be buckled together, and the shell comprises an upper and lower half shell that can be buckled together.

[0016] For example, at least one embodiment of the present invention provides a modified fiber oil removal filter, further comprising: The upper and lower edges of the communicating ring plate are both provided with guide portions, and the inner wall of the backwash ring pipe is provided with two guide grooves spaced apart from each other and extending circumferentially, and the guide portions are in sliding engagement with the guide grooves in a one-to-one correspondence.

[0017] For example, at least one embodiment of the present invention provides a modified fiber oil removal filter, further comprising: A water distribution ring pipe is provided in the shell, the water distribution ring pipe is communicated with the water inlet and is located above the supporting orifice plate. A plurality of nozzles for spraying water to the filter material are circumferentially provided on the water distribution ring pipe.

[0018] The beneficial effects of the embodiments of the present invention are: In the present invention, during the normal filtration phase, the sewage outlet is closed, and the water inlet and outlet are open. Industrial turbid circulating water containing oil and suspended matter flows into the housing through the water inlet. The suspended matter and oil in the water are filtered out by the interception, sedimentation, and adsorption of the fiber filter material. Clear water then flows out of the water outlet through the small holes in the support plate, completing the filtration process.

[0019] After the filter has been running for a while, a large amount of suspended matter and oil accumulate on the surface of the filter media, necessitating a backwash. At this point, close the water inlet and outlet, and initiate the backwash process. First, the backwash loop is rotated to connect with the backwash water supply pipe. Water from the backwash water supply pipe enters the loop and sprays backwash water from the jet holes onto the filter media layer above, flushing the filter media. After a certain period of water flushing, the backwash loop is rotated to connect with the backwash air supply pipe. Air enters the loop and is ejected from the jet holes to form a backwash airflow. This airflow creates a bubbling phenomenon in the water, causing the filter media to churn in the water and remove particles adsorbed on the filter media's micropores. Simultaneously, the vortex formed within the housing evenly agitates the entire filter media, reducing backwash blind spots. The synergistic effect of alternating air and water flushing improves the efficiency of contaminant removal. After backwashing is complete, open the drain valve to allow the wastewater containing impurities to drain out of the housing.

[0020] By using the method of alternating air and water backwashing, the flushing effect of water flow and the stirring effect of air flow are fully utilized to improve the efficiency of pollutant stripping, reduce water consumption, and shorten the time required for backwashing, thereby improving the overall operating efficiency of the filter and reducing the frequency of filter material replacement.

[0021] Compared with the traditional air-water alternating flushing structure, on the one hand, this solution reduces the extra space occupied by setting up two sets of pipes separately by integrating the backwash water pipe and the backwash air pipe into a backwash ring pipe, and will not cause the problem of increasing the overall volume of the filter; on the other hand, when backwashing, by driving the backwash ring pipe to rotate, it can be alternately connected with the backwash water supply pipe and the backwash air supply pipe, so that the backwash ring pipe can rotate while spraying air or water from the injection hole, thereby increasing the coverage of the backwash, allowing the air or water flow to be fully distributed at different positions of the filter material, further reducing the backwash dead angle, and making the backwash effect more uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly describes the drawings required for describing the embodiments of the present invention. Obviously, the drawings described below are merely exemplary embodiments of the present invention. Those skilled in the art can, without inventive effort, derive other drawings based on the contents of the exemplary embodiments of the present invention and these drawings.

[0023] Figure 1 This is a schematic diagram of the appearance of a modified fiber oil removal filter in 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 an 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 an embodiment of the present invention; Figure 5 for Figure 4 Enlarged view of point B in the middle; Figure 6 for Figure 1 A schematic structural diagram of a backwash loop pipe in an embodiment of the present invention; Figure 7 for Figure 1 Schematic diagram of the explosion structure of the backwash ring pipe in the embodiment; Figure 8 for Figure 1 A schematic structural diagram of an embodiment in which the communicating hole is located at one end of the communicating notch; Figure 9 for Figure 1 A schematic structural diagram of an embodiment in which the communicating hole is located at the other end of the communicating notch; Figure 10 for Figure 1 A schematic structural diagram of the embodiment of the connecting ring plate after sliding and resetting under the action of the elastic member; Figure 11 for Figure 8 Enlarged view of point C in the middle.

[0024] In the figure: 1. shell, 2. supporting orifice plate, 3. backwash ring pipe, 4. backwash air supply pipe, 5. backwash water supply pipe, 101. water inlet, 102. water outlet, 103. sewage outlet, 301. injection hole, 302. connecting gap, 6. connecting ring plate, 601. connecting hole, 7. guide sleeve, 8. first spring, 9. second spring, 10. positive magnetic element, 11. negative magnetic element, 603. elastic element, 303. guide slope, 604. support plate, 304. limiting block, 12. sliding rod, 1201. locking hole, 13. locking element, 14. pressing element, 15. rotating shaft, 16. bracket, 1501. mounting groove, 17. transmission shaft, 1701. mounting block, 602. guide part, 305. guide groove, 18. water distribution ring pipe, 1801. nozzle. DETAILED DESCRIPTION

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention.

[0026] To simplify the drawings, only portions relevant to the invention are schematically depicted in each figure; they do not represent the actual structure of the product. Furthermore, to simplify the drawings and facilitate understanding, in some figures, only one component with the same structure or function is schematically depicted or labeled. In this document, "one" not only means "only one" but also "more than one," and "several" includes "two" and "more than two."

[0027] It should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0028] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0029] In the description of this embodiment, the terms "up", "down", "left", "right", etc., and the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0030] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0031] like Figures 1 to 11 The figure shows a modified fiber oil removal filter according to one embodiment of the present invention, comprising a housing 1, a support orifice plate 2, a backwash loop 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 a water inlet 101, a water outlet 102, and a sewage outlet 103. The water 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 water outlet 102 is located at a lower position on the other side of the housing 1 to allow the filtered clean water to flow out. The sewage outlet 103 is located at the bottom side of the housing 1 and is used to discharge sewage generated during the backwash process. These openings are equipped with corresponding valves to control opening and closing. The support orifice plate 2 is located within the housing 1 and supports the fiber filter media. The support orifice plate 2 is a circular metal plate. It is uniformly distributed with a large number of small holes to allow water to pass through. The backwash loop 3 is annular and rotatably mounted on the support orifice plate 2. The backwash ring pipe 3 is evenly circumferentially formed with a circle of spray holes 301. These holes are arranged at an angle. During backwashing, the air or water jets from the spray holes 301 form vortices within the housing 1, uniformly agitating the filter media. Both the backwash air supply pipe 4 and the backwash water supply pipe 5 are inserted through the side wall of the housing 1. The backwash air supply pipe 4 is connected to an external air source, such as an air compressor, to supply air to the backwash ring pipe 3. The backwash water supply pipe 5 is connected to an external water source to provide water for backwashing.

[0032] Working Principle: During normal filtration, sewage outlet 103 is closed, and water inlet 101 and water outlet 102 are open. Industrial turbid circulating water containing oil and suspended solids flows into housing 1 through water inlet 101. The suspended solids and oil in the water are filtered out by the fibrous filter material through its interception, sedimentation, and adsorption. Clear water then flows through the small holes in support plate 2 and out of water outlet 102, completing the filtration process.

[0033] After the filter has been running for a period of time, a large amount of suspended matter and oil accumulate on the surface of the filter material, and backwashing is required. At this time, the water inlet 101 and the water outlet 102 are closed, and the backwash process is started. First, the backwash ring pipe 3 is rotated to connect with the backwash water supply pipe 5. The water in the backwash water supply pipe 5 enters the backwash ring pipe 3 and sprays backwash water from the injection hole 301 to the filter material layer above to flush the filter material. 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 sprayed from the injection hole 301 to form a backwash airflow. The airflow forms a bubbling flotation phenomenon in the water, driving the filter material to churn in the water, and carrying out the particles adsorbed on the micropores of the filter material. At the same time, the vortex formed in the shell 1 causes the filter material as a whole to be evenly stirred, reducing the backwash dead corners. The synergistic effect of alternating air and water flushing improves the efficiency of pollutant removal. After the backwash is completed, the valve of the sewage outlet 103 is opened to discharge the sewage containing impurities out of the shell 1.

[0034] By using the method of alternating air and water backwashing, the flushing effect of water flow and the stirring effect of air flow are fully utilized to improve the efficiency of pollutant stripping, reduce water consumption, and shorten the time required for backwashing, thereby improving the overall operating efficiency of the filter and reducing the frequency of filter material replacement.

[0035] Compared with the traditional air-water alternating flushing structure, on the one hand, this solution reduces the extra space occupied by setting up two sets of pipes separately by integrating the backwash water pipe and the backwash air pipe into the backwash ring pipe 3, and will not cause the problem of increasing the overall volume of the filter; on the other hand, when backwashing is performed, 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, so that the backwash ring pipe 3 can rotate while spraying air or water from the injection hole 301, thereby increasing the coverage range of the backwash, allowing the air or water flow to be fully distributed at different positions of the filter material, further reducing the backwash dead angle, and making the backwash effect more uniform.

[0036] In some examples, such as Figure 3 ,as well as Figures 5 to 11 As shown, the outer sidewall of the backwash ring pipe 3 is circumferentially provided with a communication gap 302. This gap 302 provides a channel for alternating communication between the backwash ring pipe 3 and the backwash air supply pipe 4 and the backwash water supply pipe 5. A communication ring plate 6 is rotatably mounted on the inner wall of the backwash ring pipe 3 to block the communication gap 302. The communication ring plate 6 is provided with a communication hole 601, which is used to alternately connect to the backwash air supply pipe 4 and the backwash water supply pipe 5 and slide within the range of the communication gap 302.

[0037] A guide sleeve 7 is radially provided on both side walls of the shell 1, and the backwash air supply pipe 4 and the backwash water supply pipe 5 are respectively slidably provided inside the two guide sleeves 7 in a one-to-one correspondence. The guide sleeve 7 provides a guiding function for the backwash air supply pipe 4 and the backwash water supply pipe 5. A first spring 8 is sleeved on the backwash air supply pipe 4, and the two ends of the first spring 8 act on the backwash air supply pipe 4 and the outer wall of the shell 1 respectively. Similarly, a second spring 9 is sleeved on the backwash water supply pipe 5, and the two ends of the second spring 9 act on the backwash water supply pipe 5 and the outer wall of the shell 1 respectively. The function of the two springs is to provide a force for the backwash air supply pipe 4 and the backwash water supply pipe 5 to approach the backwash ring pipe 3, ensuring that under normal conditions, the pipe 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, and the abutment has a certain sealing property, which will not cause a large amount of gas and water leakage.

[0038] On the connecting ring plate 6, a positive magnetic attraction part 10 is arranged around the connecting hole 601. At the same time, a negative magnetic attraction part 11 is arranged at the ends of the backwash air supply pipe 4 and the backwash water supply pipe 5. An elastic part 603 is connected between the connecting ring plate 6 and the inner wall of the backwash ring pipe 3. The elastic part 603 is preferably an elastic rope or a spring. A support plate 604 is arranged on the inner wall of the connecting ring plate 6. There are two support plates 604 and they are respectively located on both sides of the connecting hole 601. A limit block 304 is arranged on the inner wall of the backwash ring pipe 3. There are two limit blocks 304 and they are respectively located at both ends of the connecting gap 302. The two support plates 604 are respectively used to abut 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 part 603, taking the elastic rope as an example, hanging rings are designed at both ends of the elastic rope, and the hanging rings at both ends are respectively hung on the support plate 604 on the inner wall of the connecting ring plate 6 and the positioning column on the inner wall of the backwash ring pipe 3.

[0039] The elastic member 603 provides 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 stopper 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 to facilitate the separation of the nozzle of the backwash air supply pipe 4 or the backwash water supply pipe 5 from the connecting hole 601 and reconnect it 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 make the pipe openings of the backwash air supply pipe 4 and the backwash water supply pipe 5 abut against the outer wall of the backwash ring pipe 3, maintaining a certain sealing performance to prevent a large amount of gas or water from leaking. Figure 8 As shown, at this time, under the action of the elastic member 603 , the communicating hole 601 of the communicating ring plate 6 is located at one end of the communicating notch 302 .

[0041] As the backwash ring pipe 3 rotates, the connecting gap 302 gradually rotates to the position of the backwash water supply pipe 5. Due to the action of the second spring 9, the mouth of the backwash water supply pipe 5 enters the connecting gap 302. Because the connecting hole 601 is initially located at the end position of the connecting gap 302, when the backwash water supply pipe 5 enters the connecting gap 302, the negative magnetic attraction part 11 at the end of the backwash water supply pipe 5 can attract the positive magnetic attraction part 10 around the connecting hole 601 to achieve connection, thereby connecting the backwash water supply pipe 5 with the connecting hole 601. At this time, the injection hole 301 on the backwash ring pipe 3 sprays backwash water flow toward the filter material layer above, and begins to flush the filter material with water.

[0042] As the backwash ring pipe 3 continues to rotate, the magnetic attraction prevents the connecting ring plate 6 from rotating with the backwash ring pipe 3, allowing the connecting hole 601 to maintain communication with the backwash water supply pipe 5. Furthermore, the elastic member 603 is stretched, causing the connecting hole 601 to move along the connecting notch 302. During this process, thanks to the magnetic connection, the backwash water supply pipe 5 remains connected to the connecting hole 601, achieving the effect of supplying water to the filter layer 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 limit block 304 on the corresponding side, so that the connecting ring plate 6 can no longer slide. At the same time, the nozzle of the backwash water supply pipe 5 abuts against the guiding slope 303 at the end of the connecting notch 302. Under the guidance of the guiding slope 303, the nozzle of the backwash water supply pipe 5 gradually separates from the connecting hole 601. Under the action of the second spring 9, the nozzle of the backwash water supply pipe 5 abuts against the outer wall of the backwash ring pipe 3 again. At the same time, Figure 10 As shown, the connecting ring plate 6 slides back to its original position under the action of the elastic member 603, so that the support plate 604 on the other side of the connecting hole 601 abuts against the limit block 304 on the corresponding side, thereby returning the connecting hole 601 to the initial position at one end of the connecting notch 302, waiting to be connected with the backwash air supply pipe 4 next.

[0044] As the backwash ring pipe 3 continues to rotate, the connecting gap 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 air flow to the filter material layer, and finally realizes alternating air and water backwashing.

[0045] The backwash loop 3 rotates to achieve alternating air and water backwashing, allowing the backwash air and water flows to more evenly and comprehensively affect the filter media layer, reducing dead spots during the backwash process and improving the backwash effect. The backwash loop 3 automatically rotates to achieve alternating communication with the backwash air supply pipe 4 and the backwash water supply pipe 5, eliminating the need for a complex control system to frequently start and stop the backwash loop 3 to achieve alternating communication.

[0046] In some examples, such as Figure 1 and Figure 2 As shown, a slide rod 12 is slidably provided on the top wall of the housing 1, and a lock hole 1201 is machined on the slide rod 12. A lock member 13 is slidably provided on the top wall of the housing 1, corresponding to the lock hole 1201 of the slide rod 12. A press member 14 is installed at the bottom of the slide rod 12.

[0047] Working principle: When the filter is filtering normally, the slide bar 12 is locked at the top of the housing 1 by inserting the lock 13 into the lock hole 1201. At this time, the pressing piece 14 is located at the top of the housing 1 and will not hinder the normal filtering process.

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

[0049] In some examples, such as Figure 1 and Figure 2As shown, the housing 1 is designed as a snap-fit ​​structure with two halves, connected by flanges, facilitating the installation and maintenance of the filter's internal components. A rotating shaft 15 is provided through the center of the support orifice plate 2, which can rotate on the support orifice plate 2. A bracket 16 is mounted on the top of the rotating shaft 15, which is used to support the backwash ring pipe 3. The backwash ring pipe 3 comprises two snap-fitting half-pipes, 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 pipe 3, and the two ends of the elastic member 603 are connected to the inner wall of the connecting ring plate 6 and the backwash ring pipe 3, respectively. Thereafter, the other half of the backwash ring pipe 3 is snapped together and bolted together to complete the assembly of the backwash ring pipe 3. Furthermore, the backwash ring pipe 3 is detachably mounted on the bracket 16, also using bolted connections, to facilitate maintenance or replacement. A transmission shaft 17 is provided through and rotatably disposed on the bottom wall of the housing 1, and the transmission shaft 17 is driven to rotate by a motor mounted at the bottom of the housing 1. The top of the transmission shaft 17 has a mounting block 1701, and the bottom of the rotating shaft 15 has a corresponding mounting slot 1501. To install the rotating shaft 15, insert it through the center of the support orifice plate 2, allowing the mounting slot 1501 to engage with the mounting block 1701, thereby achieving power transmission between the rotating shaft 15 and the transmission shaft 17. This assembly method clarifies the installation sequence of each component, simplifies operation, and reduces assembly difficulty.

[0050] In some examples, such as Figure 1 、 Figure 3 and Figure 5 As shown, a guide portion 602 is circumferentially provided 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 within the housing 1, above the filter material layer. The water distribution ring pipe 18 is connected to the water inlet 101 and has multiple nozzles 1801 evenly distributed along the circumference of the water distribution ring pipe 18.

[0051] When the connecting ring plate 6 slides within the backwash ring pipe 3, the guide portion 602 can slide along the guide groove 305, thereby improving the sliding stability of the connecting ring plate 6 within the backwash ring pipe 3. The water distribution ring pipe 18 can evenly distribute the incoming sewage before spraying it onto the filter layer below, ensuring that the sewage can evenly contact the filter layer, thereby ensuring the filtration effect and the utilization rate of the filter 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 the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A modified fiber oil removal filter, characterized in that: The invention comprises a shell (1), a supporting orifice plate (2), a backwashing ring pipe (3), a backwashing air supply pipe (4) and a backwashing water supply pipe (5), wherein the shell (1) is provided with a water inlet (101), a water outlet (102) and a sewage outlet (103), the supporting orifice plate (2) is arranged in the shell (1) and is used to support the fiber filter material, the backwashing ring pipe (3) is rotatably arranged above the supporting orifice plate (2), and the backwashing ring pipe (3) is provided with a connecting hole (601) and a spray hole (301), the connecting hole (601) is used to The backwash ring pipe (3) is connected to the backwash air supply pipe (4) or the backwash water supply pipe (5), and the injection holes (301) are provided with a plurality of them and are used to inject water flow or air flow toward the filter material. The backwash air supply pipe (4) and the backwash water supply pipe (5) are both arranged through the side wall of the shell (1). When the backwash ring pipe (3) rotates, the communication hole (601) can be alternately connected to the backwash air supply pipe (4) and the backwash water supply pipe (5), so that the injection holes (301) can alternately inject backwash air flow and backwash water flow toward the filter material above.

2. A modified fiber oil removal filter according to claim 1, characterized in that: A circumferentially extending communication gap (302) is provided on the peripheral wall of the backwash ring pipe (3); a communication ring plate (6) for sealing the communication gap (302) is rotatably provided in the backwash ring pipe (3); and the communication hole (601) is provided on the communication ring plate (6); The communicating hole (601) can alternately communicate 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 communicating notch (302), so that the backwash ring pipe (3) remains connected to the backwash air supply pipe (4) or the backwash water supply pipe (5) while rotating.

3. A modified fiber oil removal filter according to claim 2, characterized in that: Both sides of the shell (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, and a first spring (8) is sleeved on the backwash air supply pipe (4), and the two ends of the first spring (8) act on the backwash air supply pipe (4) and the outer wall of the shell (1) respectively, for providing a force for the backwash air supply pipe (4) to approach the backwash ring pipe (3), so that the connecting hole (601) can be connected with the backwash air supply pipe (4) when it moves close to the backwash air supply pipe (4); A second spring (9) is sleeved on the backwash water supply pipe (5), and two ends of the second spring (9) act on the backwash water supply pipe (5) and the outer wall of the shell (1) respectively, for providing a force for the backwash water supply pipe (5) to approach the backwash ring pipe (3), so that the connecting hole (601) can be connected with the backwash water supply pipe (5) when it moves to the backwash water supply pipe (5).

4. The modified fiber oil removal filter according to claim 3, characterized in that: A support plate (604) is provided on the inner wall of the communicating ring plate (6), and the support plates (604) are two and respectively located on both sides of the communicating hole (601). A limiting block (304) is provided on the inner wall of the backwash ring pipe (3), and the limiting blocks (304) are provided in two and respectively located at both ends of the communicating notch (302). The two limiting blocks (304) are respectively used to abut against the two support plates (604) to limit the sliding range of the communicating ring plate (6).

5. The modified fiber oil removal filter according to claim 4, characterized in that: The connecting ring plate (6) is provided with a positive magnetic attraction member (10) located on the periphery of the connecting hole (601), and the outlet ends of the backwash air supply pipe (4) and the backwash water supply pipe (5) are both provided with a negative magnetic attraction member (11) for attracting the positive magnetic attraction member (10), and an elastic member (603) is connected between the connecting ring plate (6) and the backwash ring pipe (3), and 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 limit block (304), so that the connecting hole (601) is located at one end of the connecting notch (302).

6. The modified fiber oil removal filter according to claim 1, characterized in that: A slide rod (12) is slidably provided on the top wall of the shell (1), and a locking hole (1201) is provided on the slide rod (12). A locking piece (13) is slidably provided on the top wall of the shell (1), and the locking piece (13) is used to be inserted into the locking hole (1201) to lock the slide rod (12). A pressing piece (14) is provided at the bottom of the slide rod (12), and the locking piece (13) is used to release the lock of the slide rod (12) during backwashing, so that the pressing piece (14) moves downward and presses onto the filter material to limit the floating of the filter material.

7. The modified fiber oil removal filter according to claim 2, characterized in that: A rotating shaft (15) is rotatably provided through the center of the supporting orifice plate (2), a bracket (16) is installed on the top of the rotating shaft (15), the backwash ring pipe (3) is detachably provided on the outer periphery of the bracket (16), a mounting groove (1501) is provided at the bottom of the rotating shaft (15), a transmission shaft (17) is rotatably provided through the bottom wall of the housing (1), a mounting block (1701) is provided on the top of the transmission shaft (17), the mounting block (1701) is used for engaging with the mounting groove (1501), and the transmission shaft (17) is driven to rotate by a driving element installed outside the housing (1).

8. The modified fiber oil removal filter according to claim 2, characterized in that: The backwash ring pipe (3) comprises two half pipes that can be buckled together, and the shell (1) comprises two half shells that can be buckled together.

9. The modified fiber oil removal filter according to claim 2, characterized in that: The upper and lower edges of the connecting ring plate (6) both have guide portions (602), and the inner wall of the backwash ring pipe (3) has two guide grooves (305) spaced apart from each other and extending circumferentially, and the guide portions (602) are in sliding engagement with the guide grooves (305) in a one-to-one correspondence.

10. The modified fiber oil removal filter according to claim 1, characterized in that: A water distribution ring pipe (18) is provided in the shell (1), the water distribution ring pipe (18) is in communication with the water inlet (101) and is located above the supporting orifice plate (2), and a plurality of nozzles (1801) for spraying water onto the filter material are provided along the circumference of the water distribution ring pipe (18).

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