CN115784374A

CN115784374A - Oil-water separation device for diversified spherical wetting filler and separation method thereof

Info

Publication number: CN115784374A
Application number: CN202211631198.4A
Authority: CN
Inventors: 李栋; 贾玉洁; 单汪唯一; 刘佳; 王小兵
Original assignee: Changzhou University
Current assignee: Changzhou University
Priority date: 2022-12-19
Filing date: 2022-12-19
Publication date: 2023-03-14

Abstract

The invention relates to the technical field of fillers, in particular to an oil-water separation device for a diversified spherical filler and a separation method thereof.

Description

Oil-water separation device for diversified spherical wetting filler and separation method thereof

Technical Field

Background

The frequent occurrence of oil-containing waste water discharge and oil spill accidents in daily production and life of people not only causes serious ecological crisis and economic loss, but also has huge potential safety hazard to human health. With the development of human industry, a large amount of oily sewage is generated in the industries of food processing, petrochemical industry, textile, metal smelting and the like, and the environment and the ecological system are greatly polluted and damaged. On a statistical basis, there are about five to ten million tons of oil entering the water each year, these sources being mainly: accidents in oil exploration, leakage of transportation tankers, oily sewage in port operations and petrochemical enterprises, oily sewage in catering and food processing enterprises, etc. The pollutants can also pollute valuable underground water resources through soil, and great harm is brought to human bodies. In addition, the trace moisture contained in the fuel oil and the lubricating oil in the engine is also a main factor influencing the service life of the engine and threatening the transportation safety. At present, the oil-water separation filler is an important component of plate polymerization equipment, and is widely applied to oil-water separation processes of oil fields and oil refineries. The filler has high strength and strong corrosion resistance, and is particularly suitable for large-diameter towers and occasions with large gas-liquid load. In the treatment of dispersed oil, a conventional metal or plastic filler such as a corrugated plate or the like is usually used, and the filler is usually not effective in the treatment and cannot treat emulsified oil. Therefore, the exploration of a continuous and efficient filler for oil-water separation can not only protect the ecological environment, but also save petroleum. In the prior art of oil-water separation, the research on oil-water separation by using a filler with special wettability is not much.

Chinese patent CN202022582037.3 proposes a demulsification filler and a horizontal oil-water separation filter containing the demulsification filler, which comprises a horizontal tank body and an oil discharge bag, wherein the horizontal tank body comprises a first tank body, a second tank body and a third tank body, a corrugated plate filler is arranged in the second tank body, an aggregation induction demulsification filler is filled in the third tank body, the aggregation induction demulsification filler is a flexible compressible material, and a plurality of drainage pore channels are arranged on the aggregation induction demulsification filler. The flexible compressible material is used for preventing impurities from blocking, so that smooth oil-water separation is ensured, and the impurity resistance is improved. However, if the corrugated plate filler is used for practical application for a long time, the effective surface area is greatly reduced, and the corrugated plate filler is easy to age.

Chinese patent CN201911048927.1 proposes a device and a method for coupling suspended matter removal and oil-water separation, wherein the suspended matter removal process and the oil-water separation process are finished in a reactor in a coupling manner, the water phase and the oil phase of the suspended matter carried by fiber filler are firstly utilized for preliminary separation, and then the suspended matter is removed and the oil-water is deeply separated; the fiber filler in the deoiling area is in any shape, and is filled in a mode of overlapping multiple fiber layers, and the adsorption filler is any one of macroporous honeycomb filler, macroporous wire mesh filler, hollow filler, fabric filler and corrugated tooth angle filler. The oil-water separation is carried out while removing the suspended matters, the two processes are not affected with each other, and the overall efficiency of removing the suspended matters and the oil-water separation is high.

Chinese patent CN202120840230.4 proposes a coalescence settling oil-water separator, which comprises a water inlet and a water outlet respectively arranged at the left and right sides of a separator shell, a sedimentation tank, a separation tank and a clean water tank which are divided in sequence are also arranged on the separator shell, a filler is arranged in the separation tank, wherein an oleophobic aggregation filler is composed of a plurality of inclined pipes which are obliquely arranged, the inclined pipes are made of oleophobic materials, and the oleophilic aggregation filler comprises a plurality of small balls made of polypropylene plastics. Although the oil-water in the oil-water separation is subjected to the mode of combining collision coalescence, wetting coalescence and combination, oil drops are coarse-grained, the floating speed of the oil drops is increased, and the oil-water separation efficiency is improved. However, the oleophobic aggregate packing is composed of a plurality of inclined pipes, so that the cost is high, and the large-scale industrial application is not facilitated.

Chinese patent CN101972559A proposes an oil-water separation device and an oil-water separation method, which comprises a cyclone with a U-shaped underflow pipe and a horizontal coalescence oil-water separator with the function of uniformly distributing liquid. An inlet liquid distributor, a rectification sieve plate, a stainless steel plate corrugated filler and a polypropylene wire mesh corrugated filler which are fixed by a limiting grid plate, an outlet liquid collector and the like are sequentially arranged in the horizontal coalescent oil-water separator. The rectifying sieve plate reduces the flow rate of liquid to be laminar flow, the stainless steel plate corrugated packing provides a place for coalescence and separation of oil drops, and the polypropylene wire mesh corrugated packing with the air floatation device can further coalesce and separate the residual fine oil drops. But also cause blockage inside the packing if there are suspended matter in the feed.

At present, oil and water are separated by using a single wetting filler for oil-water mixtures with different concentrations and different flows, so that the separation efficiency is poor, the oil-water mixtures are easily polluted, and the service life is short. Therefore, research on how to effectively combine various materials with opposite special wettability to realize continuous, large-batch and high-efficiency separation of oil-water mixed liquid and treatment of oily wastewater with high emulsification degree and difficult treatment is always the direction of efforts of researchers. In order to improve the efficiency of continuous oil-water separation, an oil-water separation device for a diversified spherical wetting particle structured packing and a separation method thereof are provided, the number of areas with different wetting packing and the number of layers of each wetting packing can be set through oil-water mixtures with different concentrations and different flow rates, and the oil-water separation efficiency is enhanced.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: in order to solve the problems that in the prior art, oil and water separation is carried out on oil-water mixtures with different concentrations and different flows by using a single wetting filler, the separation efficiency is poor, the oil-water mixtures are easily polluted, and the service life is short, a diversified wetting spherical filler oil-water separation device and a separation method thereof are provided.

The technical scheme adopted by the invention for solving the technical problem is as follows: the oil-water separation device for the diversified spherical wetting particle structured packing comprises a component for fastening and filling the packing and spherical particles filled in the device, wherein the spherical particles comprise spherical particles I, spherical particles II, spherical particles III and spherical particles IV, the spherical particles I and the spherical particles II have oleophilic and hydrophobic wetting properties, and the spherical particles III and the spherical particles IV have hydrophilic and oleophobic wetting properties;

the subassembly of fastening and filling filler includes holder, apron and bottom plate set up respectively in holder upper end and lower extreme, the cavity body forms before apron, holder and the bottom plate, spherical granule sets up in the cavity, spherical granule I, spherical granule II, spherical granule III and spherical granule IV are laid to the bottom plate by the apron in proper order the layering, spherical granule is steadilyd decrease in proper order to the infiltration nature of oil by the apron to the bottom plate, spherical granule is increased progressively in proper order to the infiltration nature of water by the apron to the bottom plate, the apron upper end is the export, the lower extreme of bottom plate is the entry of oil water mixture, the net rack that is used for fixed spherical granule is being welded to the lower extreme of the upper end of bottom plate and apron.

Preferably, the cover plate is fastened to the holder by a stud bolt.

Preferably, in some embodiments, the periphery of the retainer is fastened by common bolts.

In some preferred embodiments, the material of the base plate is metal, and the surface of the base plate is coated with a hydrophilic and oleophobic wetting material.

Preferably, in some embodiments, the material of the cover plate is metal, and the surface of the cover plate is coated with an oleophilic and hydrophobic wetting material.

Preferably, the bottom plate is nested on the bottom of the holder.

In some preferred embodiments, the mesh frame is provided with small holes at the intersection points, the spherical particles are provided with small holes, the small holes penetrate through the surface of the spherical particles, the size of the small holes at the intersection points of the mesh frame is the same as that of the small holes of the spherical particles, and the small holes of the spherical particles and the small holes at the intersection points of the mesh frame are connected through plastic rods or metal rods, so that the spherical particles fall on the mesh frame.

In some preferred embodiments, a plurality of small holes are formed in the spherical particles, and the small holes between two adjacent spherical particles are connected by a metal rod or a plastic rod, so that the spherical particles fall on the bottom plate.

The oil-water mixture enters the area where the spherical particles IV above the net rack are located from the lower part of the bottom plate, flows through the pores formed by the spherical particles IV along the surface of the spherical particles IV and has hydrophilic and oleophobic wettability, so that the collision probability of the water phase in the oil-water mixture and the spherical particles IV is improved, the water phase is spread and attached on the surface of the spherical particles IV by the hydrophilic and oleophobic wettability surface and is continuously coalesced into water drops, and the water phase in the oil-water mixture can be gathered to the bottom of the structured packing due to the action of gravity and the difference of oil-water density;

the oil phase in the oil-water mixture is in contact with the oleophobic surface of the spherical particle IV and is repelled to continue moving upwards to the area where the spherical particle III is located, a small amount of residual unadhered water phase and a large amount of oil phase in the mixture flow through the pores of the spherical particle III, and the spherical particle III has hydrophilic and oleophobic wettability, so that the collision probability of the small amount of residual water phase in the mixture and the spherical particle III is increased, the residual water phase in the mixture is spread and attached on the surface of the spherical particle III, and finally condensed into water drops to be gathered downwards;

the oil phase in the mixture continuously repulses from the oleophobic surface of the spherical particle III and moves upwards to the area where the spherical particle II is located, the oil phase with little water in the oil phase flows through the pores of the spherical particle II, the collision probability of the oil phase and the spherical particle II is increased, so that the oil phase spreads and adheres to the surface of the spherical particle II and finally coalesces into oil drops to fall off, the oil phase with low density can upwards gather at the upper part of the spherical particle II to form larger oil drops, and little water in the oil phase is repulsed and flows freely at the pores of the filler, and the oil phase with high density can downwards adhere to the spherical particle III, then coalesce into larger water drops layer by layer and downwards coalesce to finally gather at the bottom of the regular filler;

gather and form bigger oil drop then continue upwards to flow through in the region of I place of globular granule in the upper portion of globular granule II, thereby lipophilic surface infiltration nature can make oil drop improve the coalescence effect by a wide margin and form big oil drop come-up, thereby even have moisture that contains in the few oil phase also can receive hydrophobic surface rejection one deck downward coalescence, finally gather the bottom of regular packing, finally can obtain the oil that the separation is thorough and high in purity on the upper portion of whole globular granule regular packing, and the lower part is then the water that the purity is high.

The beneficial effects of the invention are:

1. the spherical particles I-IV sequentially decrease in wettability to oil from top to bottom, the spherical particles sequentially increase in wettability to water from top to bottom, oil and water phases are treated by different wettability of the oil and water phases relative to the particles and density difference of the oil and water phases under the collision and repulsion action of the spherical particles, oil and water mixtures with different concentrations and different flow rates are treated, oil with high purity can be thoroughly separated from the upper portion of the whole spherical particle structured packing, and water with high purity is arranged on the lower portion of the whole spherical particle structured packing.

2. The diversified spherical particle structured packing has the advantages of large effective mass transfer area, strong applicability and wide separation performance, can be matched with various oil-water separators, packing towers and other equipment for use to realize oil-water separation, has a simple structure, small volume and wide treatment range, can set the number of different wettability packing areas and the number of layers of wettability packing by oil-water mixtures with different concentrations and different flows, and enhances the oil-water separation efficiency.

3. Through the optimal assembly of the diversified wettability spherical particle filler, the method has the advantages of short operation flow, low required cost and large market demand.

4. The bottom plate and the cover plate are of a net structure, small holes are formed in net-shaped intersection points, the size of each small hole is as large as that of the small holes penetrating through spherical particles, the spherical particles which are gathered and settled fall on the intersection points, the place where the spherical particles are in contact with fluid is not in contact with the support, and the spherical particles are prevented from being rubbed with the bottom plate and the wall surface between the cover plates to cause loss.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a front view of a diversified spherical wetting particle structured packing for an oil-water separation device according to the present invention;

FIG. 2 is a front view of the base plate of the present invention;

FIG. 3 is a top view of the base plate of the present invention;

FIG. 4 is a perspective view of the base plate of the present invention;

FIG. 5 is a front view of the cover of the present invention;

FIG. 6 is a top view of the cover plate of the present invention;

FIG. 7 is a perspective view of the cover plate of the present invention;

FIG. 8 is a diagram of a spherical particle of the present invention;

FIG. 9 is a diagram showing the connection of two spherical particles according to the present invention.

In the figure: 1. fastening and filling a filler component 11, a retainer 12, a cover plate 121, a stud bolt 13, a bottom plate 14, a common bolt 15, a net rack 151 and small holes;

2. spherical particles; 21. spherical particles I, 22, spherical particles II, 23, spherical particles III, 24, spherical particles IV, 25 and small holes.

Detailed Description

The invention is described in more detail below with reference to the following examples:

the present invention is not limited to the following embodiments, and those skilled in the art can implement the present invention in other embodiments according to the disclosure of the present invention, or make simple changes or modifications on the design structure and idea of the present invention, and fall into the protection scope of the present invention. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

As shown in fig. 1-9, the oil-water separator for the diversified wetting spherical particle structured packing comprises a holder 11, spherical particles 2, a cover plate 12, a stud bolt 121, a bottom plate 13, a net frame 15 and a common bolt 14, wherein the spherical particles 2 comprise spherical particles i 21, spherical particles ii 22, spherical particles iii 23 and spherical particles iv 24, and small holes 25 are formed in the spherical particles 2;

cover plate 12 and bottom plate 13 set up respectively in holder 11 upper end and lower extreme, cover plate 12, form the cavity body before holder 11 and bottom plate 13, spherical particle 2 sets up in the cavity body, the upper end of cover plate 12 is the export, the lower extreme of bottom plate 13 is the entry of oil water mixture, bottom plate 13 upper end and cover plate 12 lower extreme are welded and are used for fixed spherical particle's rack 15, spherical particle 2 is located the rack 15 upper end and is layered according to hydrophilic oleophobic to oleophilic hydrophobic wettability in proper order, carry out the modification to topmost spherical particle I21 and bottommost spherical particle IV 24, make topmost spherical particle I21 have oleophilic hydrophobic wettability, bottommost spherical particle IV 24 hydrophilic oleophobic wettability, and make spherical particle III 23 have hydrophilic oleophobic wettability and spherical particle II 22 have oleophilic hydrophobic wettability, spherical particle I-IV is from the wettability to the bottom by the wettability to the oil in proper order, and spherical particle from the wettability to the bottom by the wetting to the water increases gradually in proper order, upper end fastens upper end spherical cover plate particle with rack 12 inside 15, cover plate fastening 12 edge is with the double-headed bolt 121 progressively decreased gradually.

The retainer 11 is fixed by common bolts 14, the bottom plate 13 is made of metal material, the surface is modified to have hydrophilic and oleophobic wettability, the cover plate 12 is made of metal material, the surface is modified to have oleophilic and hydrophobic wettability, the top of the bottom plate 13 is welded with the bottom of the cover plate 12 and a net rack 15, the net rack 15 can facilitate the filling and fastening of spherical particle fillers, the cover plate 12 is fastened with the surrounding retainer 11 by stud bolts 121, the external structure of the bottom plate 13 can be nested with the bottom of the retainer 11, the spherical particle 2 fillers can calculate and adjust the types and the number of layers of different wettability fillers according to oil-water mixtures with different concentrations and different flow rates, the fillers with good performance and high economic benefit can be selected for replacement, the spherical particle filler is arranged according to the rule that the wettability of the spherical particle area to oil is gradually reduced from top to bottom and the wettability of the spherical particle area to water is gradually increased from top to bottom, the uppermost spherical particle area and the lowermost spherical particle area are modified, so that the uppermost spherical particle area has oleophilic and hydrophobic wettability, the lowermost spherical particle area has hydrophilic and oleophobic wettability, the number of different wettability areas of spherical particles is calculated according to different concentrations and flow design of an oil-water mixture, the number of layers of each wettability area is calculated according to different concentrations and flow design of the oil-water mixture, and the oil-water separation effect is improved through optimal assembly of the diversified wettability spherical particle filler.

A separation method using the oil-water separation device comprises the following specific operation steps that an oil-water mixture enters a region where spherical particles IV 24 above a net rack 15 from the lower part of a separator base plate 13, the oil-water mixture flows through the spherical particles IV 24 with hydrophilic and oleophobic wettability, the surface of which is modified, the probability of collision between the water phase in the oil-water mixture and the spherical particles IV 24 is improved, the hydrophilic and oleophobic wettability surface enables the water phase to spread and adhere on the surface of the spherical particles IV 24 and continuously coalesce into water drops, the water phase in the oil-water mixture is gathered towards the bottom of a structured packing due to the action of gravity and the difference of oil-water density, the oil phase in the oil-water mixture is contacted with the oleophobic surface of the spherical particles IV 24 and is repelled to move upwards to the region where the spherical particles III 23 are located, the remaining small amount of unadhered water phase in the mixture and a large amount of oil phase flow through the pores of the spherical particles III 23, the spherical particles 23 have hydrophilic and oleophobic wettability, the probability of remaining small amount of water phase in the oil phase in the mixture is increased, the spherical particles 23 and the oil phase in the spherical particles III and the oil phase 23 is further repelled by the spherical particles 23, the spherical particles 22, the spherical particles 23 and the spherical particles 23, the spherical particles 22, the spherical particles II and the spherical particles 22 are gathered upwards, the spherical particles 22 and the spherical particles 22 are finally form a small amount, the spherical particles 22 and the spherical particles with the oil phase particles and the spherical particles with the spherical particles and the spherical particles II, and little water in the oil phase is repelled and is dissociated in the pores of the filler, because the density of the water is higher, the water can be attached to the spherical particles III 23 downwards, then the water is coalesced into larger water drops which are coalesced layer by layer and are coalesced downwards, and finally the water drops are gathered to the bottom of the structured filler, and the larger oil drops formed on the upper parts of the spherical particles II 22 continuously flow upwards through the area where the spherical particles I21 are, the oil drops can greatly improve the coalescence effect due to the oleophilic surface wettability so as to form large oil drops to float upwards, even if little water contained in the oil phase can be repelled by the hydrophobic surface, so that the water drops into the bottom of the structured filler layer by layer and are finally gathered, and finally the oil with high separation and thorough purity can be obtained on the upper parts of the structured filler of the whole spherical particles 2, and the water with high purity is arranged on the lower parts.

In light of the foregoing description of the preferred embodiment of the present invention, it is to be understood that numerous changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. The utility model provides a diversified spherical granule of infiltration nature is oil-water separator for structured packing which characterized in that: the device comprises a component (1) for fastening and filling filler and spherical particles (2) filled in the device, wherein the spherical particles (2) comprise spherical particles I (21), spherical particles II (22), spherical particles III (23) and spherical particles IV (24), the spherical particles I (21) and the spherical particles II (22) have oleophilic and hydrophobic wettability, and the spherical particles III (23) and the spherical particles IV (24) have hydrophilic and oleophobic wettability;

the assembly (1) for fastening and filling the filler comprises a retainer (11), a cover plate (12) and a bottom plate (13), wherein the cover plate (12) and the bottom plate (13) are respectively arranged at the upper end and the lower end of the retainer (11), a cavity is formed before the cover plate (12), the retainer (11) and the bottom plate (13), the spherical particles (2) are arranged in the cavity, the spherical particles I (21), the spherical particles II (22), the spherical particles III (23) and the spherical particles IV (24) are sequentially layered and paved from the cover plate (12) to the bottom plate (13), the oil wettability of the spherical particles (2) from the cover plate (12) to the bottom plate (13) is sequentially reduced, the water wettability of the spherical particles (2) from the cover plate (12) to the bottom plate (13) is sequentially increased, the upper end of the cover plate (12) is an outlet, the lower end of the bottom plate (13) is an inlet of an oil-water mixture, and the upper end of the bottom plate (13) and the lower end of the cover plate (12) are welded with a net rack (15) for fixing the spherical particles (2).

2. The oil-water separator according to claim 1, wherein the oil-water separator comprises: the cover plate (12) is fastened with the retainer (11) through a stud bolt (121).

3. The oil-water separator according to claim 1, wherein the oil-water separator comprises: the periphery of the retainer (11) is fastened through common bolts (14).

4. The oil-water separator for the diversified wetting spherical particle structured packing as claimed in claim 1, wherein: the material of bottom plate (13) is the metal, bottom plate (13) surface coating has hydrophilic oleophobic infiltration nature material.

5. The oil-water separator according to claim 1, wherein the oil-water separator comprises: the cover plate (12) is made of metal, and the surface of the cover plate (12) is coated with an oleophilic and hydrophobic wetting material.

6. The oil-water separator according to claim 1, wherein the oil-water separator comprises: the bottom plate (13) is nested on the bottom of the retainer (11).

7. The oil-water separator according to claim 1, wherein the oil-water separator comprises: net rack (15) nodical department is equipped with aperture (151), all be provided with aperture (25) on globular granule (2), aperture (25) pierce through in globular granule (2) surface, the size of aperture (25) of globular granule (2) is the same with the size of aperture (151) of net rack (15) intersection point department, aperture (25) of globular granule (2) and aperture (151) of net rack (15) intersection point department are connected through plastics pole or metal pole, realize that globular granule (2) fall on net rack (15).

8. The oil-water separator for the diversified wetting spherical particle structured packing as claimed in claim 7, wherein: the spherical particles (2) are provided with a plurality of small holes (25), and the small holes (25) between two adjacent spherical particles (2) are connected by metal rods or plastic rods, so that the spherical particles (2) fall on the bottom plate (13).

9. A separation method using the apparatus for separating oil and water as defined in any one of claims 1 to 8, wherein the apparatus comprises: the oil-water mixture enters the area where the spherical particles IV (24) above the net rack (15) from the lower part of the bottom plate (13), flows through the spherical particles IV (24) with hydrophilic and oleophobic wettability, the surface of which is modified, along the pores formed by the spherical particles IV (24), so that the collision probability of the water phase in the oil-water mixture and the spherical particles IV (24) is improved, and the water phase is spread and attached on the surface of the spherical particles IV (24) by the hydrophilic and oleophobic wettability surface and is continuously coalesced into water drops, and the water phase in the oil-water mixture can be gathered towards the bottom of the structured packing due to the action of gravity and the difference of oil-water density;

the oil phase in the oil-water mixture is in contact with the oleophobic surface of the spherical particle IV (24) and is repelled to continue moving upwards to the area where the spherical particle III (23) is located, the residual small amount of unadhered water phase and the large amount of oil phase in the mixture flow through the pores of the spherical particle III (23), and the collision probability of the residual small amount of water phase in the mixture and the spherical particle III (23) is increased due to the hydrophilic and oleophobic wettability of the spherical particle III (23), so that the residual water phase in the mixture is spread and attached on the surface of the spherical particle III (23) and finally is coagulated into water drops to be gathered downwards;

the oil phase in the mixture is continuously repelled by the oleophobic surface of the spherical particle III (23) and moves upwards to the area of the spherical particle II (22), the oil phase with little water in the oil phase flows through the pores of the spherical particle II (22), the collision probability of the oil phase and the spherical particle II (22) is increased, the oil phase spreads and adheres to the surface of the spherical particle II (22), and finally is aggregated into oil drops to fall off, the oil phase with low density is aggregated upwards on the upper part of the spherical particle II (22) to form larger oil drops, little water in the oil phase is repelled and is dissociated at the pores of the filler, and the oil phase with high density is downward attached to the spherical particle III (23), then is aggregated into larger water drops which are aggregated layer by layer and downwards and finally is aggregated to the bottom of the structured filler;

the oil drops gather on the upper portion of the spherical particle II (22) to form larger oil drops, then the oil drops continuously flow upwards through the area where the spherical particle I (21) is located, the oil drops can be greatly improved in coalescence effect due to the lipophilic surface wettability, large oil drops float upwards, even if few water contained in the oil phase is repelled by the hydrophobic surface, the oil drops are coalesced downwards layer by layer, finally the oil drops gather at the bottom of the structured packing, finally, oil with thorough separation and high purity can be obtained on the upper portion of the whole spherical particle (2) structured packing, and water with high purity is obtained on the lower portion of the structured packing.