Oil-water coalescence filter element

Abstract

The utility model discloses an oil-water coalescence filter element which comprises a filter element, a descaling assembly and a driving assembly, the filter element comprises a demulsification layer, a coalescence layer and a separation layer which are sequentially arranged from inside to outside in the radial direction of the filter element, and the demulsification layer, the coalescence layer and the separation layer independently rotate; at least one of the demulsification layer, the coalescence layer and the separation layer forms a subarea along the circumferential direction of the filter element, and the subarea is divided into a filter area and a closed area. The separation layer, the demulsification layer and the coalescence layer are respectively controlled to independently rotate, so that the flow rate of fluid in the filter element is controlled, and oil and water are quickly separated; in addition, the descaling assembly can powerfully remove attachments on the inner surface of the filter element, so that the service life of the filter element is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of oily sewage purification, in particular to an oil-water coalescence filter element. Background Art

[0002] At present, a large amount of oily wastewater is often generated in the processes of oil extraction and refining, metal processing, machinery and equipment cleaning, textile printing and dyeing, and leather processing. The oil phase in oily wastewater usually exists in various forms such as dispersed oil, emulsified oil, and dissolved oil, and is often accompanied by pollutants such as surfactants, polymers, and sludge. If the oily wastewater is not treated or the treatment method is improper, it will not only cause serious waste of resources, but also corrode instruments and equipment, pollute water and soil environments, and even cause damage to human health.

[0003] Fiber coalescence oil removal is a highly efficient liquid / liquid separation technology developed in recent years based on the advantages of the interdisciplinary fields of materials science and fluid mechanics. Its main principle is to utilize the flow characteristics of the fluid in the coalescence medium and the surface wettability of the material medium to coalesce and grow small dispersed oil droplets, and then separate them under the action of gravity. The oil droplets approaching or adhering to the fiber are the result of the combined effects of inertial force, van der Waals force, interception, diffusion, etc., and then the oil droplets adhere to the fiber and gradually spread. Finally, the fluid drag of the oil droplets overcomes the adhesion of the fiber to the oil droplets, and the oil droplets fall off the fiber surface.

[0004] In the above-mentioned oil-water coalescence separation process, the surface fibers of the coalescence layer material of the filter element will gradually absorb oil substances during use, so that a dense oil film is formed on the outer surface of the coalescence filter element. The oil film causes the filter element pressure drop to increase sharply, energy consumption increases, and the oil film is easily broken by the impact of the emulsion, which causes the secondary dispersion of oil droplets downstream, indirectly causing a large number of small oil droplets to flow into the downstream of the filter element, and the oil removal efficiency is significantly reduced; at the same time, the existing liquid-liquid coalescence filter element has a simple structure and can only be used for the separation of low-concentration oil-water emulsions containing a small amount of suspended matter. The emulsion separation efficiency for high oil content, high emulsification, high concentration of suspended matter, etc. is low, the service life is short, and the coalescence parts are frequently replaced; in addition, the surface characteristics of the filter element material are single, the wettability is fixed, and the parameters such as flow rate and wettability cannot be adjusted according to the upstream water quality. It cannot be applied to emulsions of different properties, and there is no targeted demulsification and coalescence separation of water-in-oil and oil-in-water emulsions. It is often necessary to frequently replace new filter elements to ensure that the downstream outlet oil content meets the standard.

[0005] Therefore, how to achieve multi-condition applicability and long service life of the oil-water coalescing filter element while ensuring the oil removal efficiency is a technical problem faced by those skilled in the art. Utility Model Content

[0006] The utility model provides an oil-water coalescing filter element to solve the problems in the prior art that the liquid flow rate inside the coalescing filter element cannot be regulated, the applicable working conditions are single, and the service life is short.

[0007] The utility model is realized by adopting the following technical solutions.

[0008] An oil-water coalescing filter element comprises a filter element, wherein the filter element comprises a demulsifying layer, a coalescing layer and a separation layer which are arranged in sequence from the inside to the outside along the radial direction of the filter element, and the demulsifying layer, the coalescing layer and the separation layer rotate independently; along the circumferential direction of the filter element, at least one of the demulsifying layer, the coalescing layer and the separation layer forms a partition, which is divided into a filtering area and a closed area.

[0009] Furthermore, the oil-water coalescing filter element also includes a descaling assembly, which includes a descaling skeleton, which is inserted into the demulsification layer and on which a plurality of cleaning brushes are arranged.

[0010] Furthermore, the descaling skeleton is provided with a plurality of hollow holes, and the hollow holes are interconnected.

[0011] Furthermore, the oil-water coalescing filter element also includes a driving assembly, which includes a power unit and a transmission mechanism connected to each other, and the transmission mechanism is respectively connected to the separation layer and the descaling assembly.

[0012] Furthermore, the transmission mechanism includes a sun gear, planetary gears and an inner gear ring, and the planetary gears are meshed between the sun gear and the inner gear ring; the sun gear is connected to a descaling skeleton, and the inner gear ring is connected to a separation layer.

[0013] Furthermore, one end of the demulsification layer and the coalescence layer is provided with a hand-controlled handle, and the remaining end of the hand-controlled handle is led out from the filter element.

[0014] Furthermore, the separation layer has a spiral separation skeleton, and a plurality of drainage holes are arranged at intervals on the wall surface of the spiral separation skeleton.

[0015] Furthermore, along the circumferential direction of the filter element, the demulsification layer forms 2 / 3 of the demulsification filtration area and 1 / 3 of the demulsification closed area, the coalescence layer forms 2 / 3 of the coalescence filtration area and 1 / 3 of the coalescence closed area, and the separation layer forms 2 / 3 of the separation filtration area and 1 / 3 of the separation closed area.

[0016] Furthermore, a water inlet is provided at one end of the filter element, and a sealing end cover is provided at the other end.

[0017] Furthermore, the filter element is also provided with an upper end cover, and a plurality of water inlets are spaced apart on the upper end cover.

[0018] The utility model achieves the following beneficial effects.

[0019] 1. The oil-water coalescing filter element of the utility model realizes the control of the fluid flow rate in the filter element and the targeted demulsification and separation of oil-in-water and water-in-oil emulsions by arranging independently rotatable demulsification layers, coalescing layers, and separation layers. At the same time, the independently controllable demulsification layers, coalescing layers, and separation layers have good interchangeability and low use cost.

[0020] 2. The oil-water coalescing filter element of the utility model can achieve the best filtration performance by controlling the rotation combination of the demulsification layer, the coalescing layer, and the separation layer, and then adjusting the filter material parameters and the wettability combination matching for different emulsion types and filtration conditions.

[0021] 3. The separation layer of the oil-water coalescing filter element of the utility model can effectively cope with the fluctuation of oily wastewater in a short period of time, increase the effective contact area between the oily wastewater and the separation layer and the instantaneous discharge volume of the filter element.

[0022] 4. The oil-water coalescing filter element of the utility model is provided with a descaling assembly matched with backwashing, so as to achieve strong removal of stubborn attachments on the inner surface of the filter element, thereby extending the service life of the filter element.

[0023] 5. The descaling skeleton of the oil-water coalescing filter element of the utility model can divert and disturb the oily wastewater entering the filter element, thereby improving the efficiency of emulsion breaking and oil droplet collision and coalescence. At the same time, the disturbance of the oily wastewater by the descaling skeleton can inhibit the formation of a thick oil film inside the filter element, thereby avoiding the occurrence of a sudden increase in pressure drop and extending the service life of the filter material. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the utility model;

[0025] Figure 2 It is a cross-sectional view of the utility model along the CC line;

[0026] Figure 3 It is a structural schematic diagram of the transmission mechanism of the utility model;

[0027] Figure 4 This is a schematic diagram of the structure of the spiral separation skeleton of the utility model;

[0028] Figure 5 It is a schematic diagram of the filter element of the utility model when it is in a fully open state (wherein a. is a cross-sectional view; b. is a side view);

[0029] Figure 6 It is a schematic diagram of the filter element of the utility model when it is in a partially opened state (wherein a. is a cross-sectional view; b. is a side view);

[0030] Figure 7It is a schematic diagram of the filter element of the utility model when it is in a fully closed state (wherein a. is a cross-sectional view; b. is a side view).

[0031] Among them, 1. filter element; 11. demulsification layer; 111. demulsification filtration area; 112. demulsification sealing area; 12. coalescence layer; 121. coalescence filtration area; 122. coalescence sealing area; 13. separation layer; 130. spiral separation skeleton; 1301. drainage hole; 131. separation filtration area; 132. separation sealing area; 14. water inlet; 15. sealing end cover; 16. cleaning chamber; 17. hand control handle; 18. upper end cover; 2. descaling assembly; 21. descaling skeleton; 211. hollow hole; 22 cleaning brush; 3. drive assembly; 31. transmission mechanism; 311. sun gear; 312. planetary gear; 313. inner ring gear; 314. brake; A. sealing end; B. water inlet end; α. angle between spiral tangent and horizontal plane. DETAILED DESCRIPTION

[0032] The technical solution of the utility model will be clearly and completely described below through specific implementation methods.

[0033] like Figures 1 to 7 As shown, the utility model provides an oil-water coalescing filter element, comprising:

[0034] The filter element 1 has an independently rotatable demulsification layer 11, a coalescing layer 12, and a separation layer 13. The demulsification layer 11, the coalescing layer 12, and the separation layer 13 are sequentially arranged from inside to outside along the radial direction of the filter element 1. A water inlet 14 is arranged at one end of the filter element 1, and a sealing end cap 15 is arranged at the other end of the filter element 1.

[0035] The descaling assembly 2 comprises a descaling frame 21 and a plurality of cleaning brushes 22 connected to each other. The plurality of cleaning brushes 22 are arranged at intervals along the axis direction of the descaling frame 21. The descaling frame 21 is inserted into the demulsification layer 11. A cleaning cavity 16 for accommodating the plurality of cleaning brushes 22 is formed between the descaling frame 21 and the demulsification layer 11.

[0036] The driving assembly 3 comprises a power unit and a transmission mechanism 31 which are connected to each other. The transmission mechanism 31 is connected to the separation layer 13 and the descaling skeleton 21 respectively.

[0037] The oil-water coalescing filter element of the utility model realizes the control of the fluid flow rate in the filter element 1 and the targeted demulsification and separation of oil-in-water and water-in-oil emulsions by arranging independently rotatable demulsification layers 11, coalescing layers 12, and separation layers 13. Meanwhile, the independently controllable demulsification layers 11, coalescing layers 12, and separation layers 13 have good interchangeability and low use cost. The oil-water coalescing filter element of the utility model realizes the strong removal of stubborn attachments on the inner surface of the filter element 1 by arranging a descaling assembly 2 coordinated with backwashing, thereby extending the service life of the filter element 1. The oil-water coalescing filter element of the utility model realizes the rotation control of the separation layer 13 and the descaling skeleton 21 by arranging a transmission mechanism 31 connected to the separation layer 13 and the descaling skeleton 21, thereby realizing the self-cleaning of the filter element 1 and the efficiency control of oil-water separation.

[0038] Specifically, Figures 1 to 5 As shown, the oil-water coalescing filter element comprises a filter element 1, a descaling assembly 2, and a driving assembly 3, wherein the filter element 1 has an independently rotatable demulsification layer 11, a coalescing layer 12, and a separation layer 13, along the radial direction of the filter element 1, the demulsification layer 11, the coalescing layer 12, and the separation layer 13 are sequentially arranged from the inside to the outside, along the axial direction of the filter element 1, the two ends of the filter element 1 are respectively provided with a water inlet 14 and a sealing end cover 15, wherein the demulsification layer 11, the coalescing layer 12, and the separation layer 13 all have a supporting skeleton and a filter material layer arranged close to the outer wall surface of each supporting skeleton, in this embodiment, each layer of the supporting skeleton is made of a high-strength and wear-resistant metal material such as stainless steel and aluminum alloy, the length of each layer of the supporting skeleton is 1000 mm, the thickness is 3 mm, and the nominal diameters of the supporting skeletons of the demulsification layer 11, the coalescing layer 12, and the separation layer 13 are 80 mm, 85 mm, and 90 mm, respectively.

[0039] The descaling assembly 2 comprises a descaling skeleton 21 and a plurality of cleaning brushes 22 which are connected to each other. The plurality of cleaning brushes 22 are arranged at intervals along the axial direction of the descaling skeleton 21. The descaling skeleton 21 is penetrated into the demulsification layer 11. A cleaning cavity 16 for accommodating the plurality of cleaning brushes 22 is formed between the descaling skeleton 21 and the demulsification layer 11. In the present embodiment, the cleaning brush 22 is a steel wire brush. To prevent the descaling skeleton 21 from eccentrically rotating, the plurality of cleaning brushes 22 are arranged at equal intervals along the circumferential direction of the descaling skeleton 21.

[0040] The driving assembly 3 has a connected power unit and a transmission mechanism 31. The transmission mechanism 31 is respectively connected to the separation layer 13 and the descaling skeleton 21. In this embodiment, the driving assembly 3 also has a speed regulator connected to the power unit. The speed regulator is used to control the power output of the power unit, thereby controlling the rotation speed of the separation layer 13 and the descaling skeleton 21 between 300r / min and 600r / min.

[0041] According to one embodiment of the utility model, the transmission mechanism 31 includes a sun gear 311, a planetary gear 312, an inner ring gear 313 and a brake 314, the planetary gear 312 is meshed between the sun gear 311 and the inner ring gear 313, the sun gear 311 is connected to a descaling skeleton 21, the inner ring gear 313 is connected to a separation layer 13, and the brake 314 is directly connected to the sun gear 311 and the inner ring gear 313.

[0042] In this embodiment, the separation layer 13 and the descaling skeleton 21 share the same transmission mechanism 31 to achieve torque transmission, which saves costs and space.

[0043] Specifically, Figure 1 and Figure 3 As shown, the transmission mechanism 31 has a sun gear 311, a planetary gear 312, an inner gear ring 313 and a brake 314. The planetary gear 312 is meshed between the sun gear 311 and the inner gear ring 313, wherein the axes of the sun gear 311 and the inner gear ring 313 coincide, the sun gear 311 is connected with a descaling skeleton 21, and the inner gear ring 313 is connected with a separation layer 13. In the filtering state, the sun gear 311 does not rotate, and the inner gear ring 313 drives the separation layer 13 to rotate, so that the oil and water are quickly separated under the action of centrifugal force; in the backwashing state, the inner gear ring 313 does not rotate, and the sun gear 311 drives the descaling assembly 2 to rotate, and the attachments deposited on the inner surface of the filter element 1 are brushed and removed. Specifically, in the filtering state, the sun gear 311 is fixed by the brake 314 to prevent it from driving the descaling assembly 2 to rotate, and at the same time, force or torque is applied to the planetary gear 312 to drive the inner gear ring 313 to drive the separation layer 13 to rotate, so that the oil and water are quickly separated under the action of centrifugal force. In the backwashing state, the inner gear ring 313 is fixed by the brake 314 to prevent it from rotating, and at the same time, force or torque is applied to drive the sun gear 311 to rotate, thereby driving the descaling assembly 2 to rotate, and the attachments deposited on the inner surface of the filter element 1 are brushed and removed.

[0044] In this embodiment, the sun gear 311 is made of a spur gear with a precision of level 7, the planetary gears 312 are made of 40Cr material, and the inner ring gear 313 is made of 45 steel.

[0045] According to an embodiment of the present invention, a hand-controlled handle 17 is provided on both the demulsification layer 11 and the coalescence layer 12 at one end close to the sealing end cover 15 , and the hand-controlled handle 17 is sealedly penetrated and led out from the sealing end cover 15 .

[0046] In this embodiment, the demulsification layer 11 and the coalescence layer 12 of the filter element 1 can be rotated by the external hand-controlled handle 17, which is convenient to operate.

[0047] Specifically, Figure 1As shown, at one end close to the sealing end cover 15, i.e., the sealing end A of the filter element 1, a hand-controlled handle 17 is provided on the demulsification layer 11 and the coalescence layer 12. The hand-controlled handle 17 is sealed and led out from the sealing end cover 15. In this embodiment, the hand-controlled handle 17 is provided on the supporting frame of the demulsification layer 11 and the coalescence layer 12.

[0048] According to one embodiment of the utility model, the filter element 1 also has an upper end cover 18, which is arranged on one side of the water inlet 14 and is sealed with the filter element 1, and a plurality of water inlets 14 are spaced apart on the upper end cover 18, and the plurality of water inlets 14 are connected to the cleaning chamber 16.

[0049] In this embodiment, the filter element 1 is closed by the upper end cover 18 and the sealing end cover 15, and sewage can only flow into the filter element 1 from the water inlet 14 of the upper end cover 18, and then flow out from the circumferential direction of the filter element 1 after being filtered through the demulsification layer 11, the coagulation layer 12, and the separation layer 13 in sequence, so that the filtering effect is good.

[0050] Specifically, Figure 1 As shown, the filter element 1 also has an upper end cover 18, which is arranged on one side of the water inlet 14 and is sealed with the filter element 1, that is, the upper end cover 18 is sealedly connected to the water inlet end B of the filter element 1, and a plurality of water inlets 14 are spaced apart on the upper end cover 18, and the plurality of water inlets 14 are communicated with the cleaning chamber 16.

[0051] According to one embodiment of the present utility model, Figure 4 As shown, the separation layer 13 has a spiral separation skeleton 130 , and a plurality of drainage holes 1301 are spaced apart on the wall surface of the spiral separation skeleton 130 .

[0052] In this embodiment, the separation layer 13 can effectively cope with fluctuations in oily wastewater in a short period of time, such as increased oil content and increased drainage flow, increase the effective contact area between the oily wastewater and the separation layer 13 and the instantaneous discharge volume of the filter element 1, and quickly throw the oil droplets off the surface of the filter element 1 under the action of centrifugal force, thereby reducing the overall pressure drop of the filter element 1, maintaining the stable performance of the filter element 1, and extending the working life of the filter element 1.

[0053] Specifically, Figure 4 As shown, the separation layer 13 has a spiral separation skeleton 130, and a plurality of drainage holes 1301 are spaced apart on the wall surface of the spiral separation skeleton 130. In the present embodiment, the angle α between the spiral tangent and the horizontal plane is 30°, and the inner and outer surfaces of the spiral separation skeleton 130 are formed into an inner surface super oleophobic filter material layer and an outer surface super oleophilic filter material layer by methods such as local surface electrochemical etching and local coating of a modified solvent.

[0054] According to an embodiment of the present invention, the descaling skeleton 21 has a plurality of hollow holes 211 , and the plurality of hollow holes 211 are sequentially arranged along the axial direction and radial direction of the descaling skeleton 21 , and the hollow holes 211 are interconnected.

[0055] In this embodiment, the hollow descaling skeleton 21 guides and disturbs the oily wastewater entering the filter element 1, thereby extending the flow time of the oily wastewater in the filter element 1, allowing the emulsion and the filter material layer of the filter element 1 to fully contact, thereby improving the efficiency of emulsion demulsification and oil droplet collision and agglomeration. At the same time, the disturbance of the oily wastewater by the descaling skeleton 21 inhibits the formation of a thick oil film inside the filter element 1, thereby avoiding the occurrence of a sudden increase in pressure drop, ensuring the integrity of the filter material of the filter element 1, and extending the service life of the filter material.

[0056] Specifically, Figure 1 and Figure 2 As shown, the descaling skeleton 21 has a plurality of hollow holes 211 arranged in sequence along the axial direction and radial direction of the descaling skeleton 21 , and the hollow holes 211 are interconnected. The interconnected hollow holes 211 make the descaling skeleton 21 present a honeycomb hollow shape as a whole.

[0057] According to one embodiment of the utility model, along the circumferential direction of the filter element 1, the demulsification layer 11 has a demulsification filtration area 111 and a demulsification sealing area 112, and / or the agglomeration layer 12 has agglomeration filtration area 121 and agglomeration sealing area 122, and / or the separation layer 13 has a separation filtration area 131 and a separation sealing area 132.

[0058] In this embodiment, for different emulsion types and filtering conditions, the rotation combination of the demulsification layer 11, the coalescence layer 12, and the separation layer 13 is controlled, and then the filter material parameters and wettability combination are adjusted to match, so as to achieve the best filtering performance.

[0059] Specifically, Figures 5 to 7As shown, along the circumferential direction of the filter element 1, the demulsification layer 11 has a demulsification filtration area 111 and a demulsification sealing area 112, and / or the coalescence layer 12 has a coalescence filtration area 121 and a coalescence sealing area 122, and / or the separation layer 13 has a separation filtration area 131 and a separation sealing area 132. In this embodiment, along the circumferential direction of the filter element 1, the demulsification filtration area 111 has a filter material layer thickness of 0.5 mm to 0.8 mm, pore sizes of 1 μm to 2 μm, 2 μm to 3 μm, 3 μm to 4 μm, and wettability corresponding to underwater super oleophobic, underwater oleophobic, and underwater oleophilic. The first demulsification zone, the second demulsification zone, and the third demulsification zone; the coalescence filtration zone 121 has a filter material layer with a thickness of 1mm to 2mm, pore sizes of 4μm to 6μm, 6μm to 8μm, 8μm to 10μm respectively, and the first coalescence zone, the second coalescence zone, and the third coalescence zone with wettability corresponding to underwater oleophilic, underwater oleophobic, and underwater super oleophobic; the separation filtration zone 131 has a filter material layer with a thickness of 0.5mm to 1mm, a pore size of 100μm to 150μm, and the first separation zone, the second separation zone, and the third separation zone with wettability corresponding to underwater oleophilic, underwater oleophobic, and underwater super oleophobic.

[0060] According to one embodiment of the utility model, along the circumferential direction of the filter element 1, the demulsification layer 11 has a 2 / 3 demulsification filtration area 111 and a 1 / 3 demulsification sealing area 112, and the coalescence layer 12 has a 2 / 3 coalescence filtration area 121 and a 1 / 3 coalescence sealing area 122, and the separation layer 13 has a 2 / 3 separation filtration area 131 and a 1 / 3 separation sealing area 132.

[0061] In this embodiment, the matching regulation of the filtering performance of the filter element 1 is achieved, and the filtering efficiency is guaranteed.

[0062] Specifically, Figures 5 to 7 As shown, along the circumferential direction of the filter element 1, the demulsification layer 11, the coalescence layer 12, and the separation layer 13 all have a 2 / 3 filtration area and a 1 / 3 closed area. In this embodiment, each layer of the support skeleton has a 2 / 3 hollow area and a 1 / 3 sealing area in the circumferential direction.

[0063] Furthermore, by rotating the demulsification layer 11 , the coalescing layer 12 , and the separation layer 13 , the filter element 1 can enter a fully closed state from a fully open state.

[0064] In this embodiment, the demulsification layer 11, the coalescence layer 12, and the separation layer 13 are rotated to control the overlap of the demulsification sealing area 112, the coalescence sealing area 122, and the separation sealing area 132, thereby achieving the control of the opening and closing of the filter element 1 and the filtering capacity.

[0065] Specifically, Figures 5 to 7As shown, by rotating the demulsification layer 11, the coalescence layer 12, and the separation layer 13, the demulsification sealing area 112, the coalescence sealing area 122, and the separation sealing area 132 enter a completely staggered state from a completely overlapping state, and the filter element 1 correspondingly enters a fully closed state from a fully open state through a partially open state.

[0066] For further information, please refer to Figure 5 As shown, when the filter element 1 enters the fully open state, the demulsification closed area 112, the coalescence closed area 122, and the separation closed area 132 completely overlap.

[0067] In this embodiment, by rotating and controlling the demulsification sealing area 112 , the coalescence sealing area 122 , and the separation sealing area 132 to completely overlap, the filter element 1 is in a fully open state, and the oily wastewater is filtered out from the filter area of ​​the filter element 1 .

[0068] Specifically, Figure 5 As shown, when the filter element 1 enters the fully open state, along the circumferential direction of the filter element 1, the demulsification closed area 112, the coalescence closed area 122, and the separation closed area 132 completely overlap. At this time, the demulsification filtration area 111, the coalescence filtration area 121, and the separation filtration area 131 also completely overlap.

[0069] For further information, please refer to Figure 7 As shown, when the filter element 1 enters the fully closed state, the demulsification closed area 112, the coalescence closed area 122, and the separation closed area 132 are completely staggered.

[0070] In this embodiment, by rotating and controlling the demulsification sealing area 112 , the coalescence sealing area 122 , and the separation sealing area 132 until there is no overlap between them, the filter element 1 is in a fully closed state, and the oily wastewater cannot flow out of the filter element 1 .

[0071] Specifically, Figure 7 As shown, when the filter element 1 enters the fully closed state, along the circumferential direction of the filter element 1, there is no overlap between the demulsification closed area 112, the coalescence closed area 122, and the separation closed area 132.

[0072] The embodiments described above are merely descriptions of preferred implementation modes of the present invention, and are not intended to limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary engineering and technical personnel in the field should fall within the protection scope of the present invention. The technical contents for which protection is sought in the present invention have been fully recorded in the technical requirements.

Claims

1. An oil-water coalescing filter element, comprising a filter element (1), characterized in that: The filter element (1) comprises a demulsification layer (11), a coalescence layer (12) and a separation layer (13) which are arranged in sequence from the inside to the outside along the radial direction of the filter element (1); the demulsification layer (11), the coalescence layer (12) and the separation layer (13) rotate independently; and along the circumferential direction of the filter element (1), at least one of the demulsification layer (11), the coalescence layer (12) and the separation layer (13) forms a partition, which is divided into a filtration area and a closed area.

2. The oil-water coalescing filter element according to claim 1, characterized in that: The oil-water coalescing filter element further comprises a descaling assembly (2), wherein the descaling assembly (2) comprises a descaling skeleton (21), the descaling skeleton (21) is arranged in the demulsification layer (11), and a plurality of cleaning brushes (22) are arranged on the descaling skeleton (21).

3. The oil-water coalescing filter element according to claim 2, characterized in that: The descaling skeleton (21) is provided with a plurality of hollow holes (211), and the hollow holes (211) are interconnected.

4. The oil-water coalescing filter element according to claim 1, characterized in that: The oil-water coalescing filter element further comprises a driving assembly (3), wherein the driving assembly (3) comprises a power unit and a transmission mechanism (31) connected to each other, wherein the transmission mechanism (31) is respectively connected to the separation layer (13) and the descaling assembly (2).

5. The oil-water coalescing filter element according to claim 4, characterized in that: The transmission mechanism (31) comprises a sun gear (311), planetary gears (312) and an inner gear ring (313), wherein the planetary gear (312) is meshed between the sun gear (311) and the inner gear ring (313); the sun gear (311) is connected to a descaling skeleton (21), and the inner gear ring (313) is connected to a separation layer (13).

6. The oil-water coalescing filter element according to claim 1, characterized in that: One end of each of the demulsification layer (11) and the coalescence layer (12) is provided with a hand-controlled handle (17), and the remaining end of the hand-controlled handle (17) is led out of the filter element (1).

7. The oil-water coalescing filter element according to claim 1, characterized in that: The separation layer (13) comprises a spiral separation skeleton (130), and a plurality of drainage holes (1301) are arranged at intervals on the wall surface of the spiral separation skeleton (130).

8. The oil-water coalescing filter element according to claim 1, characterized in that: Along the circumferential direction of the filter element (1), the demulsification layer (11) forms 2 / 3 of the demulsification filtration area (111) and 1 / 3 of the demulsification closed area (112), the coalescence layer (12) forms 2 / 3 of the coalescence filtration area (121) and 1 / 3 of the coalescence closed area (122), and the separation layer (13) forms 2 / 3 of the separation filtration area (131) and 1 / 3 of the separation closed area (132).

9. The oil-water coalescing filter element according to claim 1, characterized in that: One end of the filter element (1) is provided with a water inlet (14), and the other end is provided with a sealing end cover (15).

10. The oil-water coalescing filter element according to claim 1, characterized in that: The filter element (1) is also provided with an upper end cover (18), and a plurality of water inlets (14) are provided on the upper end cover (18) at intervals.

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