Efficient filtering liquid-liquid separation coalescence filter element

Abstract

The utility model relates to the technical field of liquid treatment, in particular to an efficient filtering liquid-liquid separation coalescence filter element which comprises an inner framework, a demulsification layer, a coalescence layer and an outer framework, a plurality of through holes are formed in the surfaces of the inner framework and the outer framework, an end cover is arranged on the top of the inner framework, and an interception layer for intercepting liquid garbage is arranged on the inner side of the inner framework. A first liquid discharging space is formed between the inner framework and the demulsification layer, and a first filtering layer and a first flow guide layer are placed in the first liquid discharging space; according to the oil-containing sewage treatment device, entering oil-containing sewage is preliminarily filtered through the intercepting layer, large-particle garbage impurities in the oil-containing sewage are intercepted and filtered, then the oil-containing sewage reaches the first filtering layer through the inner framework to be filtered, and the first filtering layer filters small solid particles passing through the intercepting layer, so that passing of the solid particles is reduced; follow-up demulsification layers and coalescence layers are prevented from being polluted, the risk that particulate matter blocks a flow guide groove in the first flow guide plate is reduced, and long-term efficient operation is maintained.

Description

A high-efficiency filtration liquid-liquid separation coalescing filter element Technical Field

[0001] This application relates to the field of liquid treatment technology, and in particular to a high-efficiency filter element for liquid-liquid separation and coalescence. Background Technology

[0002] Currently, coalescing filter cartridges are a type of filtration device that uses coalescing material as the medium. They are the main components in the coalescer that play a filtering role. Tiny oil droplets dispersed in liquids such as water are captured by the ultrafine fibers on the surface of the oleophilic filter material and coalesce to form larger oil droplets. Since the density of oil droplets is less than that of water, the coalesced oil droplets automatically float to the top of the coalescer and flow out from the top opening of the coalescer. Water flows outward directly through the side wall of the filter material, thereby achieving the effect of oil and water separation.

[0003] In existing technologies, coalescing filter elements generally include an inner skeleton, an oleophilic filter layer on the outside of the inner skeleton, and an outer skeleton fixed to the outside of the oleophilic filter layer. As oily wastewater flows from the inside to the outside of the filter element, oil droplets are coalesced and retained on the oleophilic filter layer, while water flows directly out of the filter element through the oleophilic filter layer, thereby removing the oil from the water and achieving the effect of purifying oily wastewater.

[0004] Regarding the aforementioned technologies, the internal filter layer is formed by tightly wrapped multiple layers of filter layers with filter pores. Since there may be solid particles in the wastewater oil droplets, they will accumulate on the demulsification layer and the coalescence layer when passing through them, which will contaminate the demulsification layer and the coalescence layer, thus affecting the operation of the demulsification layer and the coalescence layer. Summary of the Invention

[0005] To address the problem that solid particles in wastewater oil droplets accumulate on the demulsification and coalescence layers as they pass through them, contaminating these layers and affecting their operation, this application provides a high-efficiency liquid-liquid separation coalescence filter element.

[0006] This application provides a high-efficiency filtration liquid-liquid separation coalescing filter element, which adopts the following technical solution:

[0007] The high-efficiency liquid-liquid separation coalescing filter element comprises, in sequence from the inside to the outside of the liquid flow direction, an inner skeleton, a demulsifying layer, a coalescing layer, and an outer skeleton. Multiple through holes are formed on the surfaces of both the inner and outer skeletons. An end cap is provided on the top of the inner skeleton, and an interception layer for liquid debris interception is provided on the inner side of the inner skeleton. A first drainage space is formed between the inner skeleton and the demulsifying layer. A first filtration layer and a first flow guiding layer are placed within the first drainage space. The first filtration layer is positioned between the first flow guiding layer and the inner skeleton. Multiple flow guiding grooves are formed on the surface of the first flow guiding layer along the oil droplet flow direction.

[0008] By adopting the above technical solution, during the flow of oily wastewater from inside the coalescing filter element to the outside, it sequentially passes through an interception layer, an inner skeleton, a first filtration layer, a first flow guiding layer, a demulsification layer, a coalescing layer, and an outer skeleton. The interception layer performs preliminary filtration of the incoming oily wastewater, intercepting and filtering large particles of debris. Then, it passes through the inner skeleton to the first filtration layer for further filtration. The first filtration layer filters smaller solid particles that have passed through the interception layer. This coordinated filtration by the interception layer, inner skeleton, and first filtration layer reduces the passage of solid particles, preventing contamination of the subsequent demulsification and coalescing layers, extending the lifespan of the core functional layers, reducing the risk of particulate matter clogging the flow channels on the first flow guiding plate, and maintaining long-term, high-efficiency operation. Subsequently, the inner side of the demulsification layer demulsifies the oily wastewater and coalesces into fine oil droplets. The inner side of the coalescence layer collects the fine oil droplets and coalesces into larger oil droplets. The oil droplets automatically float to the surface and separate from the water. The guide channel guides the oil droplets. After falling off, the oil droplets float rapidly along the guide channel on the surface of the first guide layer, thereby accelerating the discharge efficiency of the oil droplets. When the adsorption force between the large oil droplets and the surface of the demulsification layer is less than the traction force of the water flow, the oil droplets fall off the surface of the demulsification layer and are located in the first drainage space, thereby reducing the amount of oil droplets accumulated on the surface of the demulsification layer and thus reducing the phenomenon of pore blockage in the demulsification layer. The amount of liquid that the coalescence layer needs to process is reduced, thereby reducing the phenomenon of pore blockage in the coalescence layer. With the above settings, the filtration efficiency of the coalescence filter element is guaranteed.

[0009] Preferably, the intercepting layer is made of stainless steel mesh, and the aperture of the intercepting layer is larger than the aperture of the through holes on the inner skeleton. The first filter layer is made of polypropylene meltblown fiber, and the aperture of the first filter layer is smaller than the aperture of the through holes on the inner skeleton. The intercepting layer, the inner skeleton, and the mesh on the first filter layer form a conical channel.

[0010] By adopting the above technical solution, the mesh on the interception layer, the inner skeleton, and the first filter layer forms a conical channel, which makes the particles reaching the demulsification layer through the three layers smaller. This effectively filters solid particles in oily wastewater, reduces pollution to the demulsification layer and the coalescence layer, and thus reduces the impact on the operation of the demulsification layer and the coalescence layer.

[0011] Preferably, the outer side of the outer skeleton is provided with a drainage layer for intercepting oil droplets, the drainage layer is made of an oleophobic and hydrophilic material, and a second filter layer is provided between the outer skeleton and the drainage layer.

[0012] By adopting the above technical solution, the liquid passing through the second guide layer and the outer skeleton is filtered again through the second filter layer, so that the oil droplets and water are separated again. At the same time, the drain layer and the second filter layer form a barrier, which can intercept the large oil droplets caused by the secondary entrainment of the coalescing layer, so that the oil droplets cannot pass through the drain layer and thus separate from the water, thereby improving the filtration effect of the coalescing filter element.

[0013] Preferably, the materials of the first filter layer and the second filter layer are oleophilic and hydrophobic filter materials, the internal shape of the first filter layer is honeycomb, and the pore size of the first filter layer is larger than that of the second filter layer.

[0014] By adopting the above technical solution, the first filter layer and the second filter layer are oleophilic and hydrophobic, which makes it easier for oil droplets to be adsorbed on the surface of the filter material, while the water phase is repelled, reducing the possibility of oil and water remixing. Oil droplets are more likely to merge into large droplets on the oleophilic surface, accelerating the separation and discharge of the oil phase. At the same time, the first filter layer is honeycomb in shape, which can increase the contact with oily wastewater, reduce clogging, and better filter the wastewater.

[0015] Preferably, a second drainage space is formed between the coalescing layer and the outer skeleton, and a second guide layer is placed in the second drainage space. The surface of the second guide layer has multiple guide grooves along the direction of oil droplet flow. A third drainage space is formed between the coalescing layer and the demulsifying layer, and a third guide layer is placed in the third drainage space. The third guide layer has multiple guide grooves along the direction of oil droplet flow.

[0016] By adopting the above technical solution, oil droplets that cannot pass through the drainage layer are located in the second drainage space. The second drainage space provides storage space for oil droplets, thereby reducing the occurrence of oil droplets adhering to the surface of the drainage layer due to their inability to be discharged from the coalescing filter element in time. This reduces the phenomenon of pore blockage in the drainage layer and further improves the filtration efficiency of the coalescing filter element. At the same time, the surface of the folded second guide layer forms multiple vertically arranged grooves. Oil droplets enter the grooves, which guide the upward movement of the oil droplets and accelerate the discharge speed, thereby improving the discharge efficiency. In addition, a third drainage space is provided. After the oil droplets that have coalesced on the inner side of the coalescing layer fall off, they enter the third drainage space. The third drainage space provides storage space for oil droplets, thereby reducing the occurrence of oil droplets adhering to the surface of the coalescing layer due to their inability to be discharged from the coalescing filter element in time. This reduces the phenomenon of pore blockage in the coalescing layer and further improves the filtration efficiency of the coalescing filter element.

[0017] Preferably, the demulsifying layer is an oleophilic and hydrophobic fiber material, the coalescing layer is an oleophilic and hydrophobic fiber material, and the pore size of the demulsifying layer is smaller than the pore size of the coalescing layer.

[0018] By adopting the above technical solution, when the fine oil droplets captured by the demulsifying layer flow to the surface of the coalescing layer, a liquid film will be formed, which will then block the pores of the demulsifying layer and the coalescing layer. The smaller the pore size, the easier it is for pore blockage to occur. The pore size of the demulsifying layer is smaller than that of the coalescing layer, which allows the liquid to flow smoothly between the demulsifying layer and the coalescing layer. Therefore, a liquid film will not appear between the demulsifying layer and the coalescing layer due to the reduction in pore size. The liquid film will only form on the outer surface of the coalescing layer with larger pore size, thereby reducing the occurrence of liquid film blockage and improving the filtration efficiency of the coalescing filter element.

[0019] Preferably, the thickness of the first filter layer is 3-6 mm, the thickness of the second filter layer is 1-3 mm, the thickness of the demulsification layer is 0.2-0.4 mm, the thickness of the coalescence layer is 0.8-1.5 mm, and the thickness of the drainage layer is 1-3 mm.

[0020] By adopting the above technical solution, when the thicknesses of the first filter layer, the second filter layer, the demulsification layer, the coalescing layer, and the drainage layer are respectively as described above, the performance of the coalescing filter element is better. When the thickness of the first filter layer is higher, it can better filter oily wastewater and reduce the probability of rapid clogging of the first filter layer. The demulsification layer, the coalescing layer, and the drainage layer are generally made of fibers. When the demulsification layer, the coalescing layer, and the drainage layer are too thin, oil droplets can easily pass directly through the fibers of the demulsification layer, the coalescing layer, and the drainage layer, thus failing to achieve a good coalescing effect or interception effect. When the demulsification layer and the coalescing layer are too thick, oil droplets can easily accumulate in the fibers, retaining oil droplets and thus reducing the filtration effect.

[0021] Preferably, the inner top wall of the end cap is provided with a first groove for inserting the end of the first filter layer, a second groove for inserting the end of the first flow guide layer, a third groove for inserting the end of the third flow guide layer, a fourth groove for inserting the end of the second flow guide layer, and a fifth groove for inserting the second filter layer.

[0022] By adopting the above technical solution, the first flow guiding layer, the first filter layer, the second flow guiding layer, the second filter layer and the third flow guiding layer can be positioned, reducing the shaking of the first flow guiding layer, the first filter layer, the second flow guiding layer, the second filter layer and the third flow guiding layer, and improving the stability of the first flow guiding layer, the first filter layer, the second flow guiding layer, the second filter layer and the third flow guiding layer.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. The incoming oily wastewater is initially filtered through the interception layer, which intercepts and filters out large particles of debris and impurities in the oily wastewater. Then, it passes through the inner skeleton to the first filtration layer for filtration. The first filtration layer filters out smaller solid particles that have passed through the interception layer. The interception layer, the inner skeleton, and the first filtration layer work together to intercept and filter, reducing the passage of solid particles, avoiding contamination of the subsequent demulsification layer and agglomeration layer, extending the life of the core functional layer, reducing the risk of particulate matter clogging the guide channels on the first guide plate, and maintaining long-term efficient operation.

[0025] 2. The liquid passing through the second guide layer and the outer skeleton is filtered again through the second filter layer, so that the oil droplets and water are separated again. At the same time, the drain layer and the second filter layer form a barrier, which can intercept the large oil droplets caused by the secondary entrainment of the coalescing layer, so that the oil droplets cannot pass through the drain layer and thus separate from the water, thereby improving the filtration effect of the coalescing filter element.

[0026] 3. When the fine oil droplets captured by the demulsifying layer flow to the surface of the coalescing layer, a liquid film will form, which will then block the pores of the demulsifying and coalescing layers. The smaller the pore size, the more likely pore blockage will occur. The pore size of the demulsifying layer is smaller than that of the coalescing layer, which allows the liquid to flow smoothly between the two layers. Therefore, a liquid film will not form between the two layers due to the reduced pore size. The liquid film will only form on the outer surface of the coalescing layer with larger pore size, thereby reducing the occurrence of liquid film blockage and improving the filtration efficiency of the coalescing filter element. Attached Figure Description

[0027] Figure 1 is a structural diagram of the end face of the high-efficiency filtration liquid-liquid separation coalescing filter element without the second filter layer.

[0028] Figure 2 is a structural diagram of the high-efficiency filtration liquid-liquid separation coalescing filter element;

[0029] Figure 3 is a schematic diagram of the end face structure of the high-efficiency filtration liquid-liquid separation coalescing filter element;

[0030] Figure 4 is a schematic diagram of the end cap structure;

[0031] Figure 5 is a schematic diagram of the combined structure of the interception layer, the inner skeleton, and the first filter layer.

[0032] Reference numerals: 1. Inner skeleton; 2. First filter layer; 3. First flow guiding layer; 4. Demulsifying layer; 5. Third flow guiding layer; 6. Coagulation layer; 7. Second flow guiding layer; 8. Outer skeleton; 9. Second filter layer; 10. Drainage layer; 11. End cap; 12. Flow guiding groove; 13. First groove; 14. Second groove; 15. Third groove; 16. Fourth groove; 17. Fifth groove; 18. Interception layer; 19. First drainage space; 20. Second drainage space; 21. Third drainage space. Detailed Implementation

[0033] The present application will be further described in detail below with reference to Figures 1-5.

[0034] This application discloses a high-efficiency filter element for liquid-liquid separation and coalescence.

[0035] Referring to Figures 1 and 2, a high-efficiency liquid-liquid separation coalescing filter element includes an interception layer 18, an inner skeleton 1, a first filter layer 2, a first flow guiding layer 3, a demulsification layer 4, a coalescing layer 6, an outer skeleton 8, and a drainage layer 10. The inner skeleton 1 and the first filter layer 2 are both cylindrical with openings at both ends. The interception layer 18 is installed on the inner surface of the inner skeleton 1, and the first filter layer 2 is disposed on the surface of the inner skeleton 1. The interception layer and the first filter layer 2 perform preliminary interception and filtration of the incoming liquid, reducing the passage of solid particles in the liquid, thereby reducing the number of solid particles reaching the demulsification layer 4 and the coalescing layer 6, and reducing the impact on the demulsification layer 4 and the coalescing layer 6.

[0036] The first guide layer 3 is fitted outside the first filter layer 2, the demulsification layer 4 is fitted outside the first guide layer 3, the coalescence layer 6 is fitted outside the demulsification layer 4, and the outer skeleton 8 is fitted outside the coalescence layer 6. End caps 11 are fixedly connected to the ends of both the outer skeleton 8 and the inner skeleton 1. The drainage layer 10 is fitted outside the outer skeleton 8, and both ends of the drainage layer 10 are connected to the end caps 11. Oily wastewater is introduced into the inner side of the inner skeleton 1 through the water inlet at the bottom end cap 11, and the oily wastewater is filtered through the first filter layer 2. The oily wastewater is filtered to remove solid particles. The filtered oily wastewater then reaches the first guide layer 3 and the demulsification layer 4. Some small oil droplets coagulate on the surface of the demulsification layer 4 and float to the surface. After the demulsification effect of the demulsification layer 4, the oily wastewater aggregates into large oil droplets on the surface of the coalescence layer 6 and floats to the surface. The oil droplets that are entrained by the coalescence layer 6 are intercepted by the drainage layer 10 and float to the surface. After passing through the layers of filtration of the demulsification layer 4, the coalescence layer 6 and the drainage layer 10, the oil droplets flow out of the coalescence filter element from the top of the inner skeleton 1, thus separating from the water.

[0037] Referring to reference 3, a second drainage space 20 is formed between the coalescing layer 6 and the outer skeleton 8. A second guide layer 7 is provided in the second drainage space 20. The end of the second guide layer 7 is fixedly connected to the end cap 11. Multiple guide grooves 12 are opened on the surface of the second guide layer 7 along the direction of oil droplet flow. A third drainage space 21 is formed between the coalescing layer 6 and the demulsifying layer 4. A third guide layer 5 is provided in the third drainage space 21. The end of the third guide layer 5 is fixedly connected to the end cap 11. Multiple guide grooves 12 are opened on the third guide layer 5 along the direction of oil droplet flow. At the same time, a second filter layer 9 is provided between the outer skeleton 8 and the drainage layer 10. The second guide layer 7 is sleeved and fixed to the outside of the coalescing layer 6. The first guide layer 3 supports the demulsification layer 4, and the second guide layer 7 supports the coalescing layer 6, which improves the overall strength of the coalescing filter element. The surfaces of the first guide layer 3 and the second guide layer 7 are corrugated, and multiple guide grooves 12 are formed on the surfaces of the first guide layer 3 and the second guide layer 7. The guide grooves 12 are vertically set along the oil droplet flow direction. The guide grooves 12 guide the oil droplets, accelerate the upward speed of the oil droplets, and thus improve the discharge efficiency of the oil droplets. The third guide layer 5 can guide the oil droplets that are stuck in the demulsification layer 4 and the coalescing layer 6, so that the oil droplets stuck in the third drainage space 21 can quickly float up and be discharged.

[0038] Referring to Figure 3, the first filter layer 2 and the second filter layer 9 are oleophilic and hydrophobic filter materials. The pore size of the first filter layer 2 is larger than that of the second filter layer 9. The internal shape of the first filter layer 2 is honeycomb, which allows smaller solid particles to pass through, thereby protecting the aggregated layer 6 and the demulsifying layer 4. The honeycomb shape of the first filter layer 2 can increase the contact with oily wastewater, reduce clogging, and better filter the wastewater.

[0039] Referring to Figure 3, the demulsifying layer 4 is an oleophilic and hydrophobic demulsifying layer 4, and the coalescing layer 6 is an oleophilic and hydrophobic coalescing layer 6. The pore size of the demulsifying layer 4 is smaller than that of the coalescing layer 6. This allows the liquid to flow smoothly between the demulsifying layer 4 and the coalescing layer 6, reducing the occurrence of oil droplets clogging the gaps caused by the formation of a liquid film on the surface of the demulsifying layer 4.

[0040] Referring to Figure 3, the thickness of the first filter layer 2 is set between 5 mm, the thickness of the second filter layer 9 is set between 2 mm, the thickness of the demulsification layer 4 is set between 0.3 mm, the thickness of the coalescing layer 6 is set between 1.2 mm, and the thickness of the drainage layer 10 is set between 2 mm. The thickness of the demulsification layer 4 can be selected between 0.2 and 0.4 mm; the thickness of the coalescing layer 6 can be selected between 0.8 and 1.5 mm; the thickness of the drainage layer 10 can be selected between 1 and 3 mm; the thickness of the first filter layer 2 can be selected between 0.8 and 1.5 mm; and the thickness of the second filter layer 9 can be selected between 0.3 and 0.6 mm. When the thicknesses of the first filter layer 2, the second filter layer 9, the demulsification layer 4, the coalescing layer 6, and the drainage layer 10 are within their respective ranges, the filtration effect and filtration efficiency of the coalescing filter element can be guaranteed. At the same time, the thicker first filter layer 2 reduces clogging, thereby better interception and filtration.

[0041] Referring to Figure 4, the inner top wall of the end cap 11 has a first groove 13 for inserting the end of the first filter layer 2, a second groove 14 for inserting the end of the first flow guiding layer 3, a third groove 15 for inserting the end of the third flow guiding layer 5, a fourth groove 16 for inserting the end of the second flow guiding layer 7, and a fifth groove 17 for inserting the second filter layer 9. The end of the first filter layer 2 is inserted into the first groove 13 and fixedly connected to the end cap 11, and the end of the first flow guiding layer 3 is inserted into the second groove 14 and fixedly connected to the end cap 11. The connection is as follows: the end of the third flow guiding layer 5 is inserted into the third groove 15 and fixedly connected to the end cap 11; the end of the second flow guiding layer 7 is inserted into the fourth groove 16 and fixedly connected to the end cap 11; and the end of the second filter layer 9 is inserted into the fifth groove 17 and fixedly connected to the end cap 11. This connection can position the first filter layer 2, the first flow guiding layer 3, the second flow guiding layer 7, the third flow guiding layer 5, and the second filter layer 9, thereby ensuring the stability of the first flow guiding layer 3, the first filter layer 2, the second flow guiding layer 7, the second filter layer 9, and the third flow guiding layer 5.

[0042] Referring to Figure 5, the interception layer 18 is made of stainless steel mesh, and the pore size of the interception layer 18 is larger than the pore size of the through holes on the inner skeleton 1. The first filter layer 2 is made of polypropylene meltblown fiber, and the inner skeleton 1 is located between the interception layer 18 and the first filter layer 2. The pore size of the first filter layer 2 is smaller than the pore size of the through holes on the inner skeleton 1. The mesh on the interception layer 18, the inner skeleton 1, and the first filter layer 2 forms a conical channel. Through the channel formed by the three, oily wastewater can be better intercepted and filtered, effectively improving the filtration effect and reducing the passage of solid particles. Thus, the demulsification layer 4 and the coalescing layer 6 are effectively protected, reducing the pollution of the demulsification layer 4 and the coalescing layer 6.

[0043] The implementation principle of this application embodiment is as follows: Oily wastewater is introduced into the inner skeleton 1 from the water inlet of the bottom end cap 11 of the inner skeleton 1. The oily wastewater flows sequentially through the interception layer 18, the inner skeleton 1, the first filter layer 2, the first guide layer 3, the demulsification layer 4, the third guide layer 5, the coalescence layer 6, the second guide layer 7, the outer skeleton 8, the second filter layer 9, and the drainage layer 10. Among them, the interception layer 18 intercepts and filters large particles of solid waste, and then the inner skeleton 1 filters the oily wastewater again, so that the oily wastewater that has passed through the interception layer 18 and the inner skeleton 1 reaches the first filter layer 2. The first filter layer 2 filters the oily wastewater for smaller solid particles, reducing the passage of solid particles. Then, after the oil droplets agglomerate into larger droplets through the demulsifying layer 4 and the coalescing layer 6, they float upwards in the first drainage space 19 and the second drainage space 20, and are guided by the first guide layer 3 and the second guide layer 7, so that the oil droplets reach the water inlet of the top end cap 11 of the inner skeleton 1 and flow outwards. This reduces the amount of oil droplets accumulating on the surface of the demulsifying layer 4 and the coalescing layer 6, thereby reducing the occurrence of oil droplets clogging the filter material pores and ensuring the filtration efficiency of the coalescing filter element. The filtration through the first filter layer 2 and the second filter layer 9 also reduces the passage of solid particles, protects the demulsifying layer 4 and the coalescing layer 6, and reduces the contamination of the demulsifying layer 4 and the coalescing layer 6.

[0044] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A high-efficiency liquid-liquid separation coalescing filter element, comprising, in sequence along the direction of liquid flow from the inside to the outside, an inner skeleton (1), a demulsifying layer (4), a coalescing layer (6), and an outer skeleton (8), characterized in that, The inner skeleton (1) and the outer skeleton (8) are provided with multiple through holes on their surfaces. The top of the inner skeleton (1) is provided with an end cap (11). The inner side of the inner skeleton (1) is provided with an interception layer (18) for liquid waste interception. A first drainage space (19) is formed between the inner skeleton (1) and the demulsification layer (4). A first filter layer (2) and a first flow guide layer (3) are placed in the first drainage space (19). The first filter layer (2) is located between the first flow guide layer (3) and the inner skeleton (1). The surface of the first flow guide layer (3) is provided with multiple flow guide grooves (12) along the oil droplet flow direction.

2. The high-efficiency filtration liquid-liquid separation coalescing filter element according to claim 1, characterized in that, The intercepting layer (18) is made of stainless steel mesh, and the aperture of the intercepting layer (18) is larger than the aperture of the through hole on the inner skeleton (1). The first filter layer (2) is made of polypropylene meltblown fiber, and the aperture of the first filter layer (2) is smaller than the aperture of the through hole on the inner skeleton (1). The mesh on the intercepting layer (18), the inner skeleton (1) and the first filter layer (2) forms a conical channel.

3. The high efficiency filtration liquid-liquid separation coalescer cartridge of claim 1 wherein, The outer frame (8) is provided with a drainage layer (10) for intercepting oil droplets. The drainage layer (10) is made of oleophobic and hydrophilic material. A second filter layer (9) is provided between the outer frame (8) and the drainage layer (10).

4. The high-efficiency filtration liquid-liquid separation coalescing filter element according to claim 3, characterized in that, The materials of the first filter layer (2) and the second filter layer (9) are oleophilic and hydrophobic filter materials. The internal shape of the first filter layer (2) is honeycomb-shaped, and the pore size of the first filter layer (2) is larger than that of the second filter layer (9).

5. The high-efficiency filtration liquid-liquid separation coalescing filter element according to claim 1, characterized in that, A second drainage space (20) is formed between the coalescing layer (6) and the outer skeleton (8). A second guide layer (7) is placed in the second drainage space (20). Multiple guide grooves (12) are opened on the surface of the second guide layer (7) along the direction of oil droplet flow. A third drainage space (21) is formed between the coalescing layer (6) and the demulsifying layer (4). A third guide layer (5) is placed in the third drainage space (21). Multiple guide grooves (12) are opened on the third guide layer (5) along the direction of oil droplet flow.

6. The high-efficiency filtration liquid-liquid separation coalescing filter element according to claim 1, characterized in that, The demulsifying layer (4) is an oleophilic and hydrophobic fiber material, the coalescing layer (6) is an oleophilic and hydrophobic fiber material, and the pore size of the demulsifying layer (4) is smaller than that of the coalescing layer (6).

7. The high efficiency filtration liquid-liquid separation coalescer cartridge of claim 3 wherein, The thickness of the first filter layer (2) is 3-6 mm, the thickness of the second filter layer (9) is 1-3 mm, the thickness of the demulsification layer (4) is 0.2-0.4 mm, the thickness of the coalescence layer (6) is 0.8-1.5 mm, and the thickness of the drainage layer (10) is 1-3 mm.

8. The high efficiency filtration liquid-liquid separation coalescer cartridge of claim 1 wherein, The end cap (11) has a first groove (13) for inserting the end of the first filter layer (2), a second groove (14) for inserting the end of the first flow guide layer (3), a third groove (15) for inserting the end of the third flow guide layer (5), a fourth groove (16) for inserting the end of the second flow guide layer (7), and a fifth groove (17) for inserting the second filter layer (9) on its inner top wall.

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