Oil removing filter for sewage treatment

Abstract

The utility model discloses an oil removal filter for sewage treatment belongs to sewage treatment field. Including cylinder, filter component, it is installed in the inside of cylinder, and filter component includes the support ring of installing in the inner wall of cylinder near bottom end position, and the overlap of support ring has the storage part, and the storage part includes the through type limit cylinder of overlapping on the support ring, and the limit cylinder is provided with four sets of filter parts, and the limit cylinder is provided with four sets of filter parts, and the limit cylinder is provided with four sets of filter parts, and the limit cylinder is provided with four sets of filter parts, and the limit cylinder is provided with four sets of filter parts, and the limit cylinder is provided with four sets of filter parts, and the limit cylinder is provided with four sets of filter parts, and the limit cylinder is provided with four sets of filter parts, and the limit cylinder is provided with four sets of filter parts, and the limit cylinder is provided with four sets of filter parts, and the limit cylinder is provided with four sets of filter parts, and the limit cylinder is provided with four sets of filter parts, and the limit cylinder is provided with four sets of filter parts, and the limit cylinder is provided with four sets of filter parts, and the limit cylinder is provided with four sets of filter parts, and the limit cylinder is provided with four sets of filter parts, and the limit cylinder is provided with four sets of filter parts, and the limit cylinder is provided with four sets of filter parts, and the limit cylinder is provided with four sets of filter parts, and the limit cylinder is provided with four sets of filter parts, and the limit cylinder is provided with four sets of filter parts, and the limit cylinder is provided with four sets of filter parts, and the limit cylinder is provided with four sets of filter parts, and the limit cylinder is provided with four sets of filter parts,

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to an oil removal filter for wastewater treatment. Background Technology

[0002] In the treatment of industrial wastewater (such as petrochemical, machining, and food processing) and domestic sewage, the efficient removal of oily substances (including floating oil, emulsified oil, and dissolved oil) is a crucial step in ensuring water quality meets standards and preventing pipe blockage and contamination of subsequent treatment equipment. Currently, commonly used oil removal filtration equipment mainly includes walnut shell filters, fiber ball filters, air flotation devices, membrane filters, and mechanical oil removal equipment.

[0003] For example, the invention patent with publication number CN110292793B discloses a self-cleaning oil removal filter, which includes a shell and several independent sector-shaped zones. Each sector-shaped zone has a filter screen installed at both its upper and lower openings. Each sector-shaped zone is filled with oil removal material and a cleaning mechanism. This facilitates the cleaning of the filter media.

[0004] However, in actual use, the aforementioned oil removal filter, with its filter screen acting as the first barrier before wastewater enters the filter media layer, initially intercepts larger suspended particles (such as silt and debris) and some undispersed oil droplets to reduce the filtration load on the filter media. But during this process, impurities in the wastewater (especially mixtures of viscous oil and suspended particles) easily adhere to the filter screen surface and pores due to adsorption and adhesion. Initially, this may only manifest as localized pore blockage of the filter screen and a slight increase in filtration resistance; however, as operating time increases, the adhered impurities gradually form a continuous scale layer, leading to a reduction in the effective permeable area of ​​the filter screen. Therefore, it is necessary to design an oil removal filter specifically for wastewater treatment.

[0005] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore may include information that does not constitute prior art. Utility Model Content

[0006] This utility model provides an oil removal filter for sewage treatment to solve the problem that the filter screen can trap large particles and floating oil to reduce its load, but the mixture of sticky oil and suspended particles is easy to adhere, causing local blockage, increased resistance, and long-term formation of scale, which reduces the effective permeability area of ​​the filter screen.

[0007] This utility model embodiment adopts the following technical solution: an oil removal filter for sewage treatment. It mainly includes a cylindrical body; a filter assembly installed inside the cylindrical body, the filter assembly including a support ring installed on the inner wall of the cylindrical body near the bottom end, a storage section overlapping the support ring, the storage section including a through-type limiting cylinder overlapping the support ring, the limiting cylinder containing four sets of filter sections for removing oil from sewage; and a cleaning assembly sleeved on the cylindrical body, the cleaning assembly including a mounting box sleeved on the cylindrical body, a cleaning section installed on one side of the mounting box, the cleaning section including a collection box slidably installed on one side of the mounting box, a sliding groove adapted to the width of the collection box being opened through the mounting box and the cylindrical body, a brush detachably installed inside the collection box, and a discharge section installed on one side of the mounting box.

[0008] Furthermore, the filter section is spliced ​​to form a cylindrical structure. Each filter section includes a fan-shaped component, which is a hollow structure with openings at the top and bottom. Stainless steel filter screens are installed on the upper and lower edges by fasteners. The space formed by the two sets of filter screens and the fan-shaped component is filled with oil removal filter material.

[0009] Furthermore, in the initial state, part of the collection box is located inside the mounting box, while the remaining part protrudes from the mounting box, and there is a gap between the collection box and the filter screen at the lower end of the filter section.

[0010] Furthermore, the mounting box and the through-type chute on the cylinder are divided into two groups: the one near the cleaning part is the inlet chute, and the one near the unloading part is the outlet chute. Stainless steel baffles are installed on the edge of the outlet chute by screws, which normally seal the outlet chute to ensure the sealing of the cylinder.

[0011] Furthermore, a movable handle is installed on one side of the collection box.

[0012] Furthermore, a cover is installed on one side of the mounting box, which covers the exposed portion of the collection box in its initial state.

[0013] Furthermore, a right-angle plate is installed at the bottom of the mounting box, and bolts are connected to the right-angle plate.

[0014] Furthermore, four sets of positioning components are evenly spaced along the circumference of the support ring. Each set of positioning components consists of two parallel stainless steel support blocks with a gap. The support blocks are welded perpendicularly to the support ring to form a limiting groove. Four sets of docking components are integrally formed along the circumference of the limiting cylinder near the bottom outer wall. The docking components are rectangular protrusions that are inserted into the gap of the positioning components.

[0015] Furthermore, the fan-shaped component is equipped with a fan-shaped blocking part, and the blocking parts of multiple filter sections are spliced ​​together to form a circular structure.

[0016] The above-mentioned technical solutions adopted in the embodiments of this utility model can achieve the following beneficial effects:

[0017] The oil removal filter for wastewater treatment employs a four-section filter design with a positioning structure consisting of a limiting cylinder and a support ring. This allows for modular installation of the filter section, enabling independent disassembly and maintenance of individual filter sections. This avoids the need for a complete shutdown due to clogging of a single filter section, ensuring continuous filtration. The cleaning component specifically addresses the problem of filter clogging: a detachable brush inside the collection box is pushed into the cylinder via a sliding groove, directly contacting the filter screen at the bottom of the filter section to physically clean the adhering sticky oil and particulate mixture, preventing the formation of a continuous scale layer on the filter screen surface and effectively maintaining the filter screen's permeability area. The cleaned impurities are then transported from the collection box to the discharge section for discharge, avoiding secondary pollution. Attached Figure Description

[0018] The accompanying drawings, which are provided to further illustrate the present invention and constitute a part of the present invention, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.

[0019] In the attached diagram:

[0020] Figure 1 This is an overall schematic diagram of the oil removal filter for wastewater treatment in this application;

[0021] Figure 2 for Figure 1 Exploded view;

[0022] Figure 3 for Figure 2 A schematic diagram of a partial structure;

[0023] Figure 4 for Figure 3 A schematic diagram of a partial structure;

[0024] Figure 5 for Figure 2 Exploded view;

[0025] Figure 6 for Figure 1 Clean up the component usage state graph;

[0026] Figure label:

[0027] 1. Filter body; 11. Support frame; 12. Cylinder; 13. Hopper; 14. Cover plate; 141. Feed pipe; 2. Filter assembly; 21. Support ring; 22. Positioning component; 23. Limiting cylinder; 24. Connecting component; 25. Fan-shaped component; 251. Overlapping component; 26. Filter screen; 27. Shielding part; 28. Handle; 3. Cleaning assembly; 31. Mounting box; 32. Through hole; 33. Collection box; 34. Brush; 36. Shield; 37. Feeding part; 38. Movable handle; 39. Right angle plate; 310. Fastener; 4. Mounting assembly; 41. Protrusion; 42. Rotating component; 43. Locking rod; 44. Nut. Detailed Implementation

[0028] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0029] The technical solutions provided by the various embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0030] Reference Figures 1-3 As shown, this utility model embodiment provides an oil removal filter for sewage treatment, including a filter body 1. The filter body 1 includes a support frame 11, and a conical hopper 13 is fixedly installed on the support frame 11. The top of the hopper 13 is sealed to a cylindrical body 12 through a flange. A sealing cover plate 14 (with a nitrile rubber sealing ring embedded in the cover plate 14) is detachably connected to the top of the cylindrical body 12. At the same time, a feed pipe 141 with a manual gate valve is vertically connected to the center of the cover plate 14.

[0031] A filter assembly 2 is installed inside the cylinder 12. The filter assembly 2 includes a support ring 21 fixedly installed on the inner wall of the cylinder 12 near the bottom end, and four sets of positioning members 22 are evenly spaced along the circumference on the support ring 21. Each set of positioning members 22 consists of two parallel stainless steel support blocks with a gap. The support blocks are welded perpendicularly to the support ring 21 to form a limiting groove. At the same time, a storage part is attached to the support ring 21. The storage part includes a through-type limiting cylinder 23 attached to the support ring 21.

[0032] Furthermore, the limiting cylinder 23 has four sets of docking parts 24 integrally formed along the circumferential direction near the bottom outer wall (corresponding one-to-one with the positioning parts 22). The docking parts 24 are rectangular protrusions, which are suitable for insertion into the spacing of the positioning parts 22. Through the cooperation of the protrusions and the slots, the limiting cylinder 23 is axially limited on the support ring 21, and there is no radial wobbling.

[0033] The limiting cylinder 23 is provided with at least four sets of filter sections, which are spliced ​​together to form a cylindrical structure. Each set of filter sections includes a fan-shaped component 25, which is a hollow structure with openings at the top and bottom. Stainless steel filter screens 26 (with the edges turned up to fit the fan-shaped component 25) are installed on the upper and lower edges of the fan-shaped component 25 by fasteners. The space formed by the two sets of filter screens 26 and the fan-shaped component 25 is filled with oil removal filter material (such as a mixture of modified walnut shell and activated carbon particles). At the same time, a fan-shaped blocking part 27 is installed on the fan-shaped component 25. The blocking parts 27 of the multiple sets of filter sections are spliced ​​together to form a ring structure, so that the sewage entering the limiting cylinder 23 through the feed pipe 141 falls onto the filter screen 26.

[0034] Furthermore, a handle 28 is fixedly installed on each set of fan-shaped components 25, which facilitates the extraction of the fan-shaped component 25 from the limiting cylinder 23;

[0035] Oily wastewater enters the cylinder 12 of the filter body 1 through the feed pipe 141. After being guided by the top cover plate 14, it flows directly into the limiting cylinder 23. At this time, the fan-shaped shielding parts 27 of the four filter sections are spliced ​​into a complete circular structure, which confines the wastewater inside the limiting cylinder 23, prevents the wastewater from flowing directly down the cylinder wall, and ensures that the wastewater is evenly distributed to the top filter screen 26 of each filter section.

[0036] Wastewater first comes into contact with the top stainless steel filter screen 26. The filter screen 26 initially intercepts larger suspended particles (such as silt and debris) and some floating oil droplets in the wastewater, while supporting the internal filter media to prevent loss. The wastewater that has been initially filtered passes through the top filter screen 26 and enters the fan-shaped part 25. The modified walnut shell and activated carbon mixed filter media fills the core oil removal function: the walnut shell adsorbs oil with its porous structure, while the activated carbon further adsorbs dissolved oil and small molecule organic matter. Through the action of physical adsorption and interception, the removal of oily substances is achieved.

[0037] The limiting cylinder 23 cooperates with the positioning part 22 (slot) on the support ring 21 through the bottom docking part 24 (rectangular protrusion) to achieve axial limiting and radial fixation, avoiding shaking caused by water flow impact; the four filter parts are spliced ​​into a cylindrical structure, with the outer side fitting against the inner wall of the limiting cylinder 23, and the inner side forming a closed space through the shielding part 27, ensuring that sewage only enters the filter media layer through the filter screen 26, without short-circuit leakage;

[0038] When the filter media is saturated or the upper filter screen 26 is clogged, the cover plate 14 can be removed, and a certain group of filter sections can be pulled out individually through the handle 28 on the fan-shaped part 25 (without disassembling the whole). If the filter screen 26 needs to be cleaned, the filter screen 26 can be removed by simply removing the fasteners. If the filter media needs to be replaced, the old filter media should be emptied and new mixed particles should be filled in. Then, the fan-shaped part 25 should be put back into the limiting cylinder 23 (align it with the position through the handle 28 to ensure that it is tightly spliced ​​with other filter sections). The shielding part 27 and the cover plate 14 can be reinstalled to restore operation.

[0039] In order to clean the filter screen 26 located at the lower end of the filter section, such as Figures 5-6 As shown, a cleaning component 3 is sleeved on the cylinder 12. The cleaning component 3 includes a mounting box 31 fixedly sleeved on the cylinder 12, and a through hole 32 adapted to the cylinder 12 is provided on the mounting box 31. A sealing ring (not shown in the figure) is provided in the contact area between the mounting box 31 and the cylinder 12.

[0040] A cleaning unit is installed on one side of the mounting box 31. This cleaning unit includes a collection box 33 that is fixedly installed on one side of the mounting box 31 and slidably disposed thereon. Slots adapted to the width of the collection box 33 are also provided through the mounting box 31 and the cylinder 12 (not shown in the figure). In the initial state, part of the collection box 33 is inside the mounting box 31, and the remaining part protrudes from the mounting box 31 (see reference). Figure 2 (), so as not to affect the normal use of the filter section, and at the same time there is a gap between it and the lower filter screen 26 of the filter section;

[0041] Furthermore, a brush 34 is detachably installed inside the collection box 33. When the installation box 31 is pushed into the cylinder 12, part of the brush 34 contacts the lower end of the filter screen 26 of the filter section to clean the dirt attached to the mesh of the filter screen 26. At the same time, the cleaned dirt falls into the installation box 31. Meanwhile, a downwardly inclined feeding part 37 is fixedly installed on the side of the installation box 31 away from the installation box 31. Here, the through-type chute on the installation box 31 and the cylinder 12 is divided into two groups: the part closer to the cleaning part is the inlet chute (the part that initially accommodates the collection box 33), and the part closer to the feeding part 37 is the outlet chute. A stainless steel baffle (with a neoprene rubber sealing gasket pasted on the edge) is installed on the edge of the outlet chute by screws to block the outlet chute under normal conditions to ensure the sealing of the cylinder 12.

[0042] Furthermore, a movable handle 38 is fixedly installed on one side of the collection box 33. In the initial state, the movable handle 38 is vertically perpendicular to the surface of the collection box 33, avoiding excessive protrusion that could interfere with other components. When in use, rotate it 90° toward the collection box 33 so that it is parallel to the surface of the collection box 33. The operator can hold the handle with one hand and easily push the collection box 33 to slide. This saves storage space and optimizes the direction of force through the parallel posture, ensuring that the collection box 33 enters the cylinder 12 smoothly to complete the cleaning action.

[0043] It should be noted that the active handle 38 can only achieve 90-degree unidirectional rotation positioning through the built-in limiting buckle structure (that is, rotating from the initial position perpendicular to the surface of the collection box 33 to the use position parallel to the surface of the collection box 33). The structural principle of its rotation limiting is a conventional technical means in this field (such as the common folding tool handle limiting design), and its specific mechanical structure and principle will not be described in detail here.

[0044] During the cleaning operation, first close the inlet valve of the corresponding filter section and remove the baffle at the outlet. Then, hold the plastic handle on the outside of the collection box 33 and push it smoothly into the cylinder 12 from the inlet along the guide rail. During the pushing process, the brush 34 moves synchronously with the collection box 33 and rubs against the lower surface of the filter screen 26, sweeping the dirt in the mesh into the collection box 33. When the collection box 33 has completely passed through the cylinder 12 and extended from the outlet to above the discharge section 37, stop pushing. At this time, the impurities accumulated inside the collection box 33 can be removed.

[0045] To facilitate dust prevention for the brush 34 during initial placement, such as Figure 5 As shown, a cover 36 is fixedly installed on one side of the mounting box 31. The cover 36 just covers the exposed part of the collection box 33 in the initial state. A right-angle plate 39 is installed at the bottom of the mounting box 31. A bolt 310 is connected to the right-angle plate 39. When the collection box 33 is in the initial position, tightening the bolt 310 can rigidly lock the mounting box 31 and the collection box 33 to prevent the collection box 33 from shifting due to vibration during equipment operation. When cleaning is required, loosening the bolt 310 can release the lock.

[0046] To facilitate the removal of cover plate 14, such as Figure 2 As shown, an installation assembly 4 is installed on the cylinder 12. The installation assembly 4 includes an annular plate (not shown in the figure) fixedly installed at one end of the cylinder 12, and multiple sets of protrusions 41 are fixedly installed circumferentially on the bottom surface of the annular plate. Each protrusion 41 consists of two sets of protruding blocks spaced apart, and a rotating component 42 is mounted between the two sets of protruding blocks. The rotating component 42 has a locking rod 43. At the same time, an opening groove adapted to the locking rod 43 is opened on the cover plate 14, and a nut 44 is threadedly connected to one end of the locking rod 43.

[0047] During installation, rotate the locking rod 43 to the vertically upward position, aligning the opening slot of the cover plate 14 with the locking rod 43 for insertion. The vertical section of the locking rod 43 will then be embedded in the opening slot. Finally, tighten the nut 44 to ensure a tight fit between the nut 44 and the upper surface of the cover plate 14, achieving quick locking of the cover plate 14. For disassembly, simply loosen the nut 44 and rotate the locking rod 43 in the opposite direction to release the lock; complete removal of the nut 44 is not required.

[0048] Working principle: Oily wastewater enters the cylinder 12 through the feed pipe 141 (with a manual gate valve to control the flow rate) in the center of the cover plate 14, and flows directly into the limiting cylinder 23 after being guided by the sealing cover plate 14. At this time, the annular structure confines the wastewater inside the limiting cylinder 23, preventing the wastewater from flowing along the cylinder wall and ensuring that the wastewater is evenly distributed to the top stainless steel filter screen 26 of each group of filter sections. The wastewater is first pre-filtered by the top filter screen 26, which intercepts larger suspended particles (such as silt and debris) and some floating oil droplets, while supporting the internal filter media to prevent loss.

[0049] Subsequently, the pre-filtered wastewater enters the interior of the fan-shaped component 25, where it is filled with modified walnut shells. The walnut shells, with their porous structure, adsorb oil stains, while activated carbon further adsorbs dissolved oil and small molecule organic matter. Through the synergistic effect of physical adsorption and interception, oily substances are removed. The purified water passes through the bottom filter screen 26 and is collected in the conical discharge hopper 13 for discharge.

[0050] When the bottom filter screen 26 is clogged, first close the water inlet valve of the corresponding filter section, loosen the bolt 310 at the bottom of the mounting box 31 to release the lock of the collection box 33, and remove the baffle at the outlet. Hold the movable handle 38 (rotate it to a state parallel to the collection box 33), and push the collection box 33 smoothly into the cylinder 12 from the inlet. At this time, the brush 34 inside the collection box 33 moves with it and rubs against the lower surface of the filter screen 26, sweeping the dirt in the mesh into the collection box 33. After the collection box 33 extends from the outlet to above the discharge section 37, collect the impurities, clean it, pull the collection box 33 back to the initial position, relock the bolt 310 and install the baffle to complete the cleaning.

[0051] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An oil removal filter for wastewater treatment, characterized in that: include Cylinder (12); A filter assembly (2) is installed inside the cylinder (12). The filter assembly (2) includes a support ring (21) installed on the inner wall of the cylinder (12) near the bottom. A storage part is attached to the support ring (21). The storage part includes a through-type limiting cylinder (23) attached to the support ring (21). The limiting cylinder (23) is provided with four sets of filter parts for removing oil from sewage. A cleaning component (3) is sleeved on a cylinder (12). The cleaning component (3) includes a mounting box (31) sleeved on the cylinder (12). A cleaning part is installed on one side of the mounting box (31). The cleaning part includes a collection box (33) slidably installed on one side of the mounting box (31). A sliding groove adapted to the width of the collection box (33) is opened through the mounting box (31) and the cylinder (12). A brush (34) is detachably installed in the collection box (33). A feeding part (37) is installed on one side of the mounting box (31).

2. The oil removal filter for wastewater treatment according to claim 1, characterized in that: Four sets of filter sections are spliced ​​to form a cylindrical structure. Each set of filter sections includes a fan-shaped component (25). The fan-shaped component (25) is a hollow structure with openings at the top and bottom. Stainless steel filter screens (26) are installed on the upper and lower edges of the fan-shaped component (25) by fasteners. The space formed by the two sets of filter screens (26) and the fan-shaped component (25) is filled with oil removal filter material.

3. The oil removal filter for wastewater treatment according to claim 2, characterized in that: In the initial state, part of the collection box (33) is inside the mounting box (31), and the remaining part protrudes from the mounting box (31). There is a gap between the collection box (33) and the filter screen (26) at the lower end of the filter section.

4. The oil removal filter for wastewater treatment according to claim 3, characterized in that: The mounting box (31) and the through-type chute on the cylinder (12) are divided into two groups. The one closer to the cleaning part is the inlet chute, and the one closer to the unloading part (37) is the outlet chute. The edge of the outlet chute is fitted with a stainless steel baffle by screws. Under normal conditions, the outlet chute is sealed to ensure the airtightness of the cylinder (12).

5. The oil removal filter for wastewater treatment according to claim 2, characterized in that: A movable handle (38) is installed on one side of the collection box (33).

6. The oil removal filter for wastewater treatment according to claim 4, characterized in that: A cover (36) is installed on one side of the mounting box (31), and the cover (36) covers the exposed part of the collection box (33) in its initial state.

7. The oil removal filter for wastewater treatment according to claim 6, characterized in that: A right-angle plate (39) is installed at the bottom of the mounting box (31), and a bolt (310) is connected to the right-angle plate (39).

8. The oil removal filter for wastewater treatment according to claim 1, characterized in that: The support ring (21) is provided with four sets of positioning parts (22) at equal intervals along the circumference. Each set of positioning parts (22) consists of two parallel stainless steel support blocks with a gap. The support blocks are welded perpendicularly to the support ring (21) to form a limiting groove. The limiting cylinder (23) is integrally formed with four sets of docking parts (24) along the circumference near the bottom outer wall. The docking parts (24) are rectangular protrusions that are inserted into the gap of the positioning parts (22).

9. The oil removal filter for wastewater treatment according to claim 2, characterized in that: The fan-shaped component (25) is equipped with a fan-shaped shielding part (27), and the shielding parts (27) of multiple filter parts are spliced ​​together to form a circular structure.

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