Oilfield water treatment fillers and devices

Abstract

The present disclosure relates to the field of oil-water separation, and an oilfield water treatment filler and device include a first filler and a second filler. The first filler includes a plurality of oil-water separation layers. The plurality of oil-water separation layers are stacked in the up-down direction, and each oil-water separation layer is provided with a plurality of concave flow channels and a plurality of convex flow channels arranged in an alternating manner, the height of the concave flow channels is lower than the convex flow channels, and the upper surface and / or the lower surface is formed as an oil-collecting surface, and the oil-collecting surface is scattered with protruding oil-collecting particles. Among them, a water outlet hole is provided at the bottom of the concave flow channel, an oil outlet hole is provided at the top of the convex flow channel, and from the inflow end to the outflow end, the concave flow channel is arranged in an undulating manner, and the convex flow channel is arranged in an undulating manner. The second filler is arranged at the rear stage of the oil-water separation layer, and includes a first wire mesh layer, and the first wire mesh layer is arranged at the rear stage of the oil-water separation layer, and includes a first wire mesh structure formed by interweaving oleophilic and hydrophobic silk threads and hydrophilic and oleophobic silk threads. The oilfield water treatment filler and device disclosed in the present disclosure are conducive to improving the oil recovery rate.

Description

Technical Field

[0001] The present invention relates to the technical field of oilfield water treatment, and in particular to oilfield water treatment fillers and devices. Background Art

[0002] A large amount of oilfield water is produced during oilfield exploitation. The oil content in the oilfield water is low, and the oil particles are very fine, making it difficult to remove from the water by simple gravity separation.

[0003] In the related art, gas flotation equipment is used to treat oilfield water, and the bubbles blown by the gas flotation equipment make the oil float on the water surface as much as possible before collecting the oil. However, the gas flotation equipment has a complex structure, high energy consumption and high cost during operation, and if the gas flotation equipment is not used, the oil recovery rate is low. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present disclosure is to provide an oilfield water treatment filler with a simple structure, low cost and conducive to improving the oil recovery rate.

[0005] The oilfield water treatment filler provided by the present disclosure includes a first filler, which includes: at least one oil-water separation layer, provided with a plurality of staggered concave flow channels and a plurality of convex flow channels, the height of the concave flow channel is lower than the convex flow channel, and the upper surface and / or the lower surface is formed as an oil gathering surface; wherein a water outlet hole is provided at the bottom of the concave flow channel, and the concave flow channel is undulating from the inflow end of the concave flow channel to the outflow end of the concave flow channel; an oil outlet hole is provided at the top of the convex flow channel, and the convex flow channel is undulating from the inflow end of the convex flow channel to the outflow end of the convex flow channel.

[0006] According to some embodiments provided by the present disclosure, each of the concave flow channels is provided with a plurality of first concave valleys and a plurality of first convex peaks, and from the inflow end of the concave flow channel to the outflow end of the concave flow channel, the plurality of first concave valleys and the plurality of first convex peaks are arranged alternately, and the water outlet is provided at the bottom of the first concave valley;

[0007] Each of the convex flow channels is provided with a plurality of second valleys and second peaks, and from the inlet end to the outlet end of the convex flow channel, the plurality of second valleys and the plurality of second peaks are arranged alternately, and the top of the first peak is at the same height as the bottom of the second valley, and the oil outlet is provided at the top of the second peak.

[0008] According to some embodiments provided by the present disclosure, the oil-collecting surface is a rough surface.

[0009] According to some embodiments provided by the present disclosure, the oil outlet hole and the water outlet hole are staggered.

[0010] According to some embodiments provided by the present disclosure, there are multiple oil-water separation layers, multiple oil-water separation layers are stacked in the up-down direction, multiple water outlet holes are aligned and connected in the up-down direction, and multiple oil outlet holes are aligned and connected in the up-down direction.

[0011] According to some embodiments provided by the present disclosure, a second filler is further included, wherein the second filler includes a first mesh layer, which is disposed after the oil-water separation layer and includes a first mesh structure formed by interweaving oleophilic and hydrophobic threads and hydrophilic and oleophobic threads;

[0012] The interlacing points of the oleophilic and hydrophobic threads and the hydrophilic and oleophobic threads form oil-collecting locations.

[0013] According to some embodiments provided in the present disclosure, the second filler also includes: a second wire mesh layer, which is arranged at the rear stage of the first wire mesh layer and includes a second wire mesh structure formed by interweaving oleophilic and hydrophobic wires and hydrophilic and oleophobic wires, and the mesh aperture of the second wire mesh structure is larger than that of the first wire mesh structure.

[0014] According to some embodiments provided by the present disclosure, the material used to make the oleophilic and hydrophobic silk thread includes polypropylene or modified polypropylene, and the material used to make the hydrophilic and oleophobic silk thread includes stainless steel.

[0015] According to some embodiments provided by the present disclosure, it includes: a filter layer connected to the front stage of the first wire mesh layer.

[0016] The present disclosure also provides an oilfield water treatment device, comprising: a shell, in which a treatment chamber is provided, and one end is provided with a water inlet hole connected to the treatment chamber, and the other end is provided with an oil discharge hole and a water drain hole connected to the treatment chamber, and the oil discharge hole is located above the water drain hole; and the oilfield water treatment filler as described above, which is arranged between the oil discharge hole and the water drain hole in the treatment chamber. Beneficial Effects

[0017] (1) The oilfield water treatment packing and device disclosed in the present invention, wherein the first packing has a simple structure, low cost and is conducive to improving the oil recovery rate.

[0018] (2) The oilfield water treatment packing and device disclosed herein, wherein the second packing is difficult to be clogged and has a long service life.

[0019] (3) The oilfield water treatment packing and device disclosed in the present invention, the second packing has a simple structure, low cost and is conducive to further improving the oil recovery rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the arrangement of the first filler in the embodiment of the present disclosure.

[0021] Figure 2Schematic diagram of the flow channels and opening arrangement of the oil-water separation layer in the embodiment of the present disclosure.

[0022] Figure 3 Schematic diagram of a concave flow channel according to an embodiment of the present disclosure.

[0023] Figure 4 Schematic diagram of a convex flow channel according to an embodiment of the present disclosure.

[0024] Figure 5 It is a schematic diagram of the arrangement of the second filler in the embodiment of the present disclosure.

[0025] Figure 6 Schematic diagram of the structure of the second filler portion of an embodiment of the present disclosure.

[0026] Figure 7 It is a structural schematic diagram of the oilfield water treatment equipment according to an embodiment of the present disclosure.

[0027] Reference numerals:

[0028] 10. first filler; 11. oil-water separation layer; 12. concave flow channel; 121. first concave valley; 122. first convex peak; 1201. water outlet; 13. convex flow channel; 131. second concave valley; 132. second convex peak; 1301. oil outlet;

[0029] 20, second filler; 21, first wire mesh layer; 211, oleophilic and hydrophobic wire; 212, hydrophilic and oleophobic wire; 213, interlacing point; 22, second wire mesh layer; 23, filter layer;

[0030] 800, shell; 8101, processing chamber; 8102, water inlet hole; 8103, oil drain hole; 8104, drain hole; 8105, first sewage drain hole; 8106, second sewage drain hole; 82, sewage collecting pipe; 83, diverter;

[0031] 900. Oil drops. DETAILED DESCRIPTION

[0032] The following is an explanation of the embodiments of the present disclosure by specific examples, and those skilled in the art can easily understand other advantages and effects of the present disclosure from the information disclosed by the present disclosure. The present disclosure can also be implemented or applied through other different specific embodiments, and the details in the present disclosure can also be modified or changed in various ways according to different viewpoints and application modules without departing from the spirit of the present disclosure. It should be noted that the embodiments in the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0033] The following is a detailed description of the embodiments of the present disclosure with reference to the accompanying drawings so that those skilled in the art can easily implement the present disclosure. The present disclosure can be embodied in many different forms and is not limited to the embodiments described herein.

[0034] In the representations of the present disclosure, the reference terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" and the like mean that the specific features, structures, materials or characteristics represented in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. Moreover, the specific features, structures, materials or characteristics represented may be combined in any one or a group of embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples represented in the present disclosure and the features of different embodiments or examples, unless they are mutually contradictory.

[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the representation of the present disclosure, "a group" means two or more, unless otherwise clearly and specifically defined.

[0036] In order to clearly describe the present disclosure, components not related to the description are omitted, and the same reference numerals are given to the same or similar components throughout the specification.

[0037] Throughout the specification, when a device is said to be "connected" to another device, this includes not only the case of "direct connection" but also the case of "indirect connection" by placing other elements therebetween. In addition, when a device is said to "include" a certain component, unless otherwise stated, it does not exclude other components, but means that other components may be included.

[0038] Although the terms first, second, etc. are used to represent various elements in this article in some examples, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, the first interface and the second interface, etc. are represented. Moreover, as used in this article, the singular forms "one", "one" and "the" are intended to also include plural forms, unless there is an opposite indication in the context. It should be further understood that the terms "comprising" and "including" indicate that there are the described features, steps, operations, elements, modules, projects, kinds, and / or groups, but do not exclude the existence, occurrence or addition of one or a group of other features, steps, operations, elements, modules, projects, kinds, and / or groups. The terms "or" and "and / or" used herein are interpreted as inclusive, or mean any one or any combination. Therefore, "A, B or C" or "A, B and / or C" means "any of the following: A; B; C; A and B; A and C; B and C; A, B and C". Only when the combination of elements, functions, steps or operations is inherently mutually exclusive in some way, will there be an exception to this definition.

[0039] The technical terms used herein are only used to refer to specific embodiments and are not intended to limit the present disclosure. The singular form used herein also includes the plural form unless the sentence clearly indicates the contrary meaning. The meaning of "including" used in the specification is to specify specific characteristics, regions, integers, steps, operations, elements and / or components, and does not exclude the existence or addition of other characteristics, regions, integers, steps, operations, elements and / or components.

[0040] Although not defined differently, all terms, including technical and scientific terms used herein, have the same meaning as those generally understood by those skilled in the art to which the present disclosure belongs. Terms defined in commonly used dictionaries are additionally interpreted as having meanings consistent with relevant technical literature and the message of the present disclosure, and shall not be overly interpreted as ideal or very formal meanings unless defined.

[0041] In the related art, gas flotation equipment is used to treat the oil field water generated during oil field exploitation. The bubbles blown by the gas flotation equipment make the oil as much as possible float on the water surface before collecting the oil. However, the gas flotation equipment has a complex structure, high energy consumption and high cost during operation. If the gas flotation equipment is not used, the oil recovery rate is low.

[0042] In view of this, the present disclosure provides an oilfield water treatment filler, which has a simple structure, low cost and is conducive to improving the oil recovery rate.

[0043] Figure 1 Schematic diagram of the arrangement of the first filler in the embodiment of the present disclosure. Figure 1The oilfield water treatment filler includes a first filler 10. The first filler 10 includes at least one oil-water separation layer 11.

[0044] Figure 2 1 is a flow channel and opening arrangement diagram of the oil-water separation layer 11 of the embodiment of the present disclosure. Figure 2 , each of the oil-water separation layers 11 is provided with a plurality of staggered concave flow channels 12 and a plurality of convex flow channels 13, and the height of the concave flow channels 12 is lower than the convex flow channels 13. In other words, the oil-water separation layer 11 is concave downward to form a plurality of concave flow channels 12, and the oil-water separation layer 11 is convex upward to form a plurality of convex flow channels 13, and the plurality of concave flow channels 12 and the plurality of convex flow channels 13 are staggered along the first direction.

[0045] The bottom of each concave flow channel 12 is provided with a water outlet 1201, and from the inflow end of the concave flow channel 12 to the outflow end of the concave flow channel 12, for example Figure 2 The concave flow channel 12 is arranged in an undulating manner from the left end to the right end of the concave flow channel 12. Therefore, when the oilfield water submerges the oilfield water treatment filler and flows through the concave flow channel 12, the distance flowing through the surface of the concave flow channel 12 is long, and the water with a higher density in the oilfield water can flow to the bottom of the oil-water separation layer 11 through the water outlet 1201.

[0046] Figure 3 Schematic diagram of the concave flow channel of the embodiment of the present disclosure. Figure 3 , each of the concave flow channels 12 is provided with a plurality of first concave valleys 121 and a plurality of first convex peaks 122. And from the inflow end of the concave flow channel 12 to the outflow end of the concave flow channel 12, the plurality of first concave valleys 121 and the plurality of first convex peaks 122 are arranged alternately, and the water outlet holes 1201 are provided at the bottom of the first concave valleys 121. Thus, when the oilfield water passes through the concave flow channel 12, it will flow through the surfaces of the plurality of first concave valleys 121 and the surfaces of the plurality of first convex peaks 122 in sequence, and the flow path is long, and the water can flow to the bottom of the oil-water separation layer 11 through the water outlet holes 1201 at the bottom of the first concave valleys 121.

[0047] Each of the convex flow channels 13 has an oil outlet 1301 at the top thereof, and an oil outlet 1301 is formed from the inflow end of the convex flow channel 13 to the outflow end of the convex flow channel 13, for example Figure 2 The convex flow channel 13 is arranged in an undulating manner from the left end to the right end of the convex flow channel 13. Therefore, when the oilfield water submerges the oilfield water treatment filler and flows through the convex flow channel 13, the distance flowing through the surface of the convex flow channel 13 is long, and the oil droplets with a smaller density in the oilfield water can flow to the top of the oil-water separation layer 11 through the oil outlet hole 1301.

[0048] Optionally, the diameter of the water outlet hole 1201 is larger than that of the oil outlet hole 1301, and the diameter of the water outlet hole 1201 is configured to allow solid impurities to pass through, thereby, the oil-water separation layer 11 can also play a role in separating solid impurities.

[0049] Optionally, the water outlet holes 1201 are arranged staggered with the oil outlet holes 1301, and specifically, a plurality of the water outlet holes 1201 are arranged staggered with a plurality of the oil outlet holes 1301. Thus, in the process of oil droplets passing through the oil outlet holes 1301 and water passing through the water outlet holes 1201, it is difficult for the oil droplets and water to be mixed again, which is helpful to avoid secondary mixing in the process of separating oil droplets and water.

[0050] Figure 4 Schematic diagram of the convex flow channel of the embodiment of the present disclosure. Figure 4 , each of the convex flow channels 13 is provided with a plurality of second valleys 131 and a second convex peak 132. And from the inflow end of the convex flow channel 13 to the outflow end of the convex flow channel 13, the plurality of second valleys 131 and the plurality of second convex peaks 132 are arranged alternately, and the peak of the first convex peak 122 is at the same height as the bottom of the second valley 131, and the oil outlet 1301 is provided at the peak of the second convex peak 132. Therefore, when the oilfield water passes through the convex flow channel 13, it will flow through the surfaces of the plurality of second valleys 131 and the plurality of second convex peaks 132 in sequence, and the flow path is long, and the oil droplets can flow to the top of the oil-water separation layer 11 through the oil outlet 1301 at the peak of the second convex peak 132.

[0051] And the upper surface and / or lower surface of the oil-water separation layer 11 is formed as an oil-collecting surface. For example, the upper surface of the oil-water separation layer 11 is formed as an oil-collecting surface, or the lower surface of the oil-water separation layer 11 is formed as an oil-collecting surface, or both the lower surface and the upper surface of the oil-water separation layer 11 are formed as oil-collecting surfaces. As a result, when the oilfield water flows through the upper surface and / or lower surface of the oil-water separation layer 11, the fine oil droplets in the oilfield water adhere to the upper surface and / or lower surface of the oil-water separation layer 11, and continuously coalesce and grow at the upper surface and / or lower surface of the oil-water separation layer 11, thereby forming large-sized oil droplets.

[0052] Optionally, the upper surface and / or lower surface of the oil-water separation layer 11 is covered with an oleophilic and hydrophobic material, which can absorb fine oil droplets, causing the fine oil droplets to coalesce and grow, thereby forming large-sized oil droplets, and then the upper surface and / or lower surface of the oil-water separation layer 11 are formed into the oil-collecting surface. Alternatively, the oil-water separation layer 11 is formed by pressing the oleophilic and hydrophobic material, thereby forming the oil-collecting surface at both the upper surface and the lower surface of the oil-water separation layer 11. Specifically, the oleophilic and hydrophobic material includes a polypropylene material or a modified polypropylene material with enhanced mechanical properties after modification.

[0053] Optionally, the oil-collecting surface is a rough surface. Thus, since the oil-collecting surface is scattered with small and numerous oil-collecting particles protruding from the oil-collecting surface, the protruding points of the oil-collecting particles play a role in colliding and contacting with fine oil droplets, especially fine oil droplets wrapped in water, and can efficiently capture fine oil droplets, so that the oil-collecting surface can fully adhere to and aggregate the fine oil droplets, allowing the fine oil droplets to fully aggregate and grow.

[0054] In summary, when the oilfield water flows through the oil-water separation layer 11, the oil with a smaller density will float upward through the oil outlet hole 1301 and float above the oil outlet hole 1301. The water with a larger density will flow through the water outlet hole 1201 to below the water outlet hole 1201. Therefore, when the oilfield water flows through the oil-water separation layer 11, the oil droplets and water are separated and are not easily mixed. After the oilfield water flows out of the oil-water separation layer 11, the oil floats above the water surface. When the oilfield water flows through the surface of the oil-water separation layer 11, fine oil droplets will aggregate on the surface of the oil-water separation layer 11. The undulating arrangement of the convex flow channel 13 and the concave flow channel 12 makes the distance of the oilfield water flowing through the surface of the oil-water separation layer 11, i.e., the oil gathering surface, longer. The oil droplets formed by the oilfield water flowing through the surface of the oil-water separation layer 11 are larger in size. When the larger oil droplets continue to flow under the drag of the continuous phase flow, they float or float above the water surface through the oil outlet 1301, which is beneficial to increase the amount of oil floating above the water surface, and further beneficial to improve the oil recovery rate. The oilfield water treatment filler has a simple structure, does not require additional driving energy during operation, and has low cost.

[0055] Optionally, see Figure 1 There are multiple oil-water separation layers 11, and the multiple oil-water separation layers 11 are stacked in the up and down direction. Figure 2 , the plurality of water outlet holes 1201 are aligned and connected in the vertical direction. Figure 3 , the multiple oil outlet holes 1301 are aligned and connected in the up-down direction. As a result, the water in the oilfield water can pass through the multiple water outlet holes 1201 in sequence and fall below the oil-water separation layer 11 with the lowest height, so that the water can be smoothly separated below the multiple oil-water separation layers 11. The oil droplets in the oilfield water can pass through the multiple oil outlet holes 1301 in sequence and rise above the oil-water separation layer 11 with the highest height, so that the oil droplets can be smoothly separated above the multiple oil-water separation layers 11. At the same time, the large surface area of ​​the multiple oil-water separation layers 11 and the multiple oil-water separation layers 11 increases the wetted perimeter of the oilfield water when it flows, reduces the hydraulic radius, reduces the Reynolds number, and increases the Froude number, so that the oilfield water flows more stably through the first filler, and improves the stability of the separation of oil droplets and water.

[0056] Optionally, the size of the first filler 10 may be 600 mm (length) * 300 mm (width) * 300 mm (height) to facilitate transportation and installation. Of course, the first filler 10 may also be processed into various specifications and sizes as required to meet different usage requirements.

[0057] Figure 5 Schematic diagram of the arrangement of the second filler in the embodiment of the present disclosure. Figure 5 The oilfield water treatment filler further comprises a second filler 20. The second filler 20 is arranged at the rear stage of the first filler 10 and comprises a first wire mesh layer 21.

[0058] Figure 6 Schematic diagram of the structure of the second filler part of the embodiment of the present disclosure. Figure 5 and Figure 6 The first mesh layer 21 includes a first mesh structure formed by interweaving oleophilic and hydrophobic threads 211 and hydrophilic and oleophobic threads 212. The interweaving points 213 of the oleophilic and hydrophobic threads 211 and the hydrophilic and oleophobic threads 212 form oil-collecting positions.

[0059] Optionally, the interweaving can be formed by weaving, and the weaving process is mature and convenient to manufacture. The oleophilic and hydrophobic silk threads 211 and the hydrophilic and oleophobic silk threads 212 are woven to form a grid structure, and the interweaving of the oleophilic and hydrophobic silk threads 211 and the hydrophilic and oleophobic silk threads 212 forms an oil collection point. The present disclosure does not limit the weaving structure and the specific shape after weaving. The grid fillers interwoven by weaving the oleophilic and hydrophobic silk threads 211 and the hydrophilic and oleophobic silk threads 212 are all within the scope of protection of the present disclosure.

[0060] Optionally, the material of the oleophilic and hydrophobic silk thread 211 includes polypropylene or modified polypropylene. The polypropylene material has good oleophilic and hydrophobic properties, and the oil droplets 900 can spread on the surface of the polypropylene material and be adsorbed by the polypropylene material. In addition, the present disclosure preferably uses modified polypropylene with enhanced mechanical properties after modification. The mechanical properties of the modified polypropylene are enhanced, and it is difficult to break during the interweaving process with the hydrophilic and oleophobic silk thread 212, so that the first screen layer 21 is easy to process and manufacture.

[0061] Optionally, the material of the hydrophilic oleophobic wire 212 includes stainless steel. The stainless steel has hydrophilic and oleophobic properties, repels oil droplets 900, and can demulsify a small amount of emulsified oil and water, so that the oil droplets 900 are squeezed out of the water package and rush to the oleophilic and hydrophobic wire 211, so that the oil droplets 900 gather and combine at the oleophilic and hydrophobic wire 211. At the same time, the stainless steel has good mechanical properties, and it is difficult to break during the interweaving process with the hydrophilic and oleophobic wire 212, so that the first wire mesh layer 21 is easy to process and manufacture. The stainless steel is also highly resistant to corrosion and is difficult to rust and damage during the process of treating oilfield water, which is conducive to improving the service life of the first wire mesh layer 21.

[0062] Therefore, when the oilfield water passes through the first filler 10 for primary agglomeration and filtration and then passes through the second filler 20, the oleophilic hydrophobic thread 211 absorbs the oil droplets 900 due to its oleophilicity. Since the hydrophilic oleophobic thread 212 has the characteristics of hydrophilicity and oleophobicity, the hydrophilic oleophobic thread 212 repels the oil droplets 900, demulsifies a small amount of emulsified oil and water, and squeezes the oil droplets 900 out of the water wrapping and rushes to the oleophilic hydrophobic thread 211. In other words, the oleophilic hydrophobic thread 211 and the hydrophilic oleophobic thread 212 have one affinity and one repellency to the oil droplets 900, one absorption and one repelling, so that the oil droplets 900 can quickly and efficiently gather at the intersection of the hydrophilic oleophobic thread 212 and the oleophilic hydrophobic thread 211, and secondary coalesce at the intersection point 213, thereby forming a larger oil droplet 900. In other words, when the oilfield water flows through the first wire mesh layer 21, the first wire mesh layer 21 collides with and intercepts the oilfield water, and can adhere to and agglomerate the oil with a lower content in the oilfield water, so that the oil droplets 900 in the oilfield water continuously agglomerate to form large-sized oil droplets, thereby exerting a high-efficiency oil-water agglomeration and separation effect, and then the oilfield water leaves the first wire mesh layer 21 under the drag of the continuous phase flow, and the large-sized oil droplets 900 also leave the first wire mesh layer 21 to which they are adhered. There will be more large-sized oil droplets 900 that can float to the surface of the water under the action of buoyancy, so that the amount of oil floating to the surface of the water is larger, which is beneficial to further improve the oil recovery rate, and the second filler 20 has a simple structure, does not require additional driving energy during operation, and has low cost.

[0063] Optionally, the aperture of the mesh of the first screen layer 21 is smaller than the interlayer gap between two adjacent oil-water separation layers 11. The aperture of the mesh of the first screen layer 21 is in the micron level, about tens of microns, measured in microns. The interlayer gap between two adjacent oil-water separation layers 11 is in the millimeter level or centimeter level, for example, 9 to 10 mm, measured in millimeters or centimeters. The interlayer gap between adjacent oil-water separation layers 11 is much larger than the aperture of the mesh of the first screen layer 21, and the oilfield water is not easy to be blocked when flowing through. When the oilfield water flows through multiple oil-water separation layers, the solid impurities in the oilfield water will be filtered out through the water outlet 1201, thereby greatly reducing the amount of solid impurities reaching the first screen layer 21, making it difficult for the first screen layer 21 with a smaller mesh aperture to be blocked during operation.

[0064] Optionally, the second screen layer 22 is arranged at the rear stage of the first screen layer 21, and the second screen layer 22 includes a second screen structure formed by interweaving oleophilic and hydrophobic silk threads 211 and hydrophilic and oleophobic silk threads 212, and the mesh aperture of the second screen structure is larger than that of the first screen structure. It is understandable that the mesh structure of the first screen structure and the mesh structure of the second screen structure and the shape of the second screen layer 22 and the first screen layer 21 can be the same or different, and can be adaptively changed according to needs. However, compared with the first screen layer 21, the wire arrangement of the second screen layer 22 is relatively sparse, and the spacing between adjacent wires is larger.

[0065] Thus, when the oilfield water passes through the second filler 20, the oilfield water first passes through the first wire mesh layer 21 and then passes through the second wire mesh layer 22. Since the mesh aperture of the second wire mesh layer 22 is larger than that of the first wire mesh layer 21, the oilfield water passes through the second wire mesh layer 22 in the flow direction (for example, Figure 5 The disturbance received when the oil flows (from left to right in the direction of the liquid), and the resistance in the up and down directions is also low, so that the large-sized oil droplets formed by the first wire mesh layer 21 are easily captured and aggregated again at this layer and easily separated by gravity, that is, the water with high density sinks, and the large-sized and low-density oil droplets float, and the oil droplets and water flow smoothly, and the required residence time is short.

[0066] Optionally, the height of the second wire mesh layer 22 is greater than the thickness of the second wire mesh layer 22, and the mesh holes of the second wire mesh layer 22 face the up-down direction. Thus, when the oilfield water flows away from the first wire mesh layer 21 and is gravity-separated in the up-down direction, that is, the water flows downward and the large-sized oil droplets 900 flow upward, the second wire mesh layer 22 can better capture the condensed large-sized oil droplets 900, and the large-sized oil droplets 900 and water can flow and separate more smoothly in the up-down direction.

[0067] Optionally, see Figure 5, the second filler 20 further includes a filter layer 23. The filter layer 23 is connected to the front stage of the first wire mesh layer 21. Therefore, before the oilfield water passes through the first wire mesh layer 21, it will first pass through the filter layer 23, and the filter layer 23 will first intercept and filter solid impurities in the oilfield water, reducing the risk of clogging of the first wire mesh layer 21, which is conducive to extending the service life of the first wire mesh layer 21.

[0068] Optionally, the filter layer 23 is detachably connected to the first wire mesh layer 21, and the filter layer 23 comprises a metal wire mesh. Thus, the filter layer 23 has high strength, is convenient for online backwashing, and is convenient for removal and separate cleaning. Specifically, the metal wire mesh is made of stainless steel wire. In other words, the metal wire mesh is formed by winding and interweaving stainless steel wires, has strong corrosion resistance, high strength, and is not easy to damage.

[0069] Optionally, the thickness of the first wire mesh layer 21 is greater than the thickness of the second wire mesh layer 22, and the thickness of the second wire mesh layer 22 is greater than the thickness of the filter layer 23. For example, the thickness of the filter layer 23 is 80 mm to 150 mm, the thickness of the first wire mesh layer 21 is 400 mm to 800 mm, and the thickness of the second wire mesh layer 22 is 200 mm to 300 mm. As a result, when the oilfield water flows through, the filter layer 23 with a small thickness will first intercept the solid impurities in the oilfield water, and because the filter layer 23 has a small thickness and a small volume, it is easy to disassemble and separate from the first wire mesh layer 21 and convenient to wash. Then, when the oilfield water leaves the filter layer 23 and passes through the first wire mesh layer 21 with a larger thickness, the flow path of the oilfield water is long, and the oil droplets 900 can be better coalesced. Finally, when the oilfield water leaves the first wire mesh layer 21 and passes through the second wire mesh layer 22 of medium thickness, the second wire mesh layer 22 of medium thickness can further aggregate the large-sized oil droplets 900, and the oil droplets 900 and water are easily separated by gravity. At the same time, it can be understood that the thickness of the first wire mesh layer 21, the second wire mesh layer 22 and the filter layer 23 of the embodiment of the present disclosure includes but is not limited to this, and can be adaptively changed.

[0070] Figure 7 Schematic diagram of the structure of the oilfield water treatment equipment according to the embodiment of the present disclosure. Figure 6 and Figure 7 The oilfield water treatment equipment includes a housing 800 and the first filler 10 as described above. A treatment chamber 8101 is provided in the housing 800, a water inlet 8102 is provided at one end of the housing 800, and an oil discharge hole 8103 and a water discharge hole 8104 communicating with the treatment chamber 8101 are provided at the other end. The oil discharge hole 8103 is located above the water discharge hole 8104. The first filler 10 is provided between the oil discharge hole 8103 and the water discharge hole 8104 in the treatment chamber 8101.

[0071] Therefore, after the oilfield water enters the shell 800 through the water inlet hole 8102, in the process of the oilfield water flowing from one end of the shell 800 to the other end of the shell 800, the first filler 10 can make more large-sized oil droplets 900 float to the surface of the water, forming a large amount of oil floating on the water surface. A large amount of oil can be sucked out through the oil discharge hole 8103, and water can be discharged through the drainage hole 8104, thereby realizing efficient separation of oil and water and a high oil recovery rate.

[0072] Optionally, a first drain hole 8105 communicating with the processing chamber 8101 is provided at the bottom of the housing 800, and the first drain hole 8105 is arranged below the first filler 10. Thus, solid impurities falling through the plurality of water outlet holes 1201 can be discharged through the first drain hole 8105, which is beneficial to avoid clogging of the second filler 20 and reduce the impact load borne by the second filler 20.

[0073] Optionally, a second drain hole 8106 communicating with the processing chamber 8101 is provided at the bottom of the shell 800, and the second drain hole 8106 is arranged corresponding to the bottom of the first wire mesh layer 21, so as to facilitate further discharge of solid impurities.

[0074] Optionally, the oilfield water treatment equipment further includes a sewage collecting pipe 82. The sewage collecting pipe 82 is respectively connected to the first sewage discharge hole 8105 and the second sewage discharge hole 8106, and is connected to the outside, which is conducive to the centralized discharge of solid impurities.

[0075] Optionally, the oilfield water treatment equipment further includes a diverter 83. The diverter 83 is disposed in the treatment chamber 8101 and is located between the water inlet 8102 and the second filler 20, and forms a plurality of diverter ports that are spaced apart. Thus, the oilfield water will be diverted through the plurality of diverter ports of the diverter 83 and then pass through the area where the oilfield water treatment filler is located. The diverter 83 can prevent a large range of turbulence from occurring when the oilfield water passes through the oilfield water treatment filler, thereby allowing the oilfield water to flow more smoothly and evenly to the oilfield water treatment filler, which is beneficial to reducing the impact of oilfield water on the oilfield water treatment filler and facilitating the oilfield water treatment filler to better separate oil and water.

[0076] The above embodiments are merely illustrative of the principles and effects of the present disclosure, and are not intended to limit the present disclosure. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present disclosure. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed in the present disclosure shall still be covered by the protection scope of the present disclosure.

Claims

1. Oilfield water treatment filler, characterized in that, The invention comprises a first filler, wherein the first filler comprises: A plurality of oil-water separation layers are stacked in the up-down direction, and each of the oil-water separation layers is provided with a plurality of concave flow channels and a plurality of convex flow channels arranged in a staggered manner, the height of the concave flow channels is lower than the convex flow channels, and the upper surface and / or the lower surface is formed into an oil-collecting surface, and the oil-collecting surface is scattered with protruding oil-collecting particles; The bottom of the concave flow channel is provided with a water outlet, and the concave flow channel is arranged undulatingly from the inflow end of the concave flow channel to the outflow end of the concave flow channel; the top of the convex flow channel is provided with an oil outlet, and the convex flow channel is arranged undulatingly from the inflow end of the convex flow channel to the outflow end of the convex flow channel; each of the concave flow channels is provided with a plurality of first concave valleys and a plurality of first convex peaks, and from the inflow end of the concave flow channel to the outflow end of the concave flow channel, the plurality of first concave valleys and the plurality of first convex peaks are arranged alternately, and the water outlet is provided with a plurality of first concave valleys and a plurality of first convex peaks; At the bottom of the first concave valley, the aperture of the water outlet hole is configured to allow solid impurities to pass through; each of the convex flow channels is provided with a plurality of second concave valleys and second convex peaks, and from the inflow end of the convex flow channel to the outflow end of the convex flow channel, the plurality of second concave valleys and the plurality of second convex peaks are arranged alternately, and the peak of the first convex peak is at the same height as the bottom of the second concave valley, and the oil outlet hole is provided at the peak of the second convex peak; and from the convex flow channel to the concave flow channel, the oil outlet hole and the water outlet hole are arranged staggered; A second filler is provided at the rear stage of the oil-water separation layer, the second filler comprises a first mesh layer, provided at the rear stage of the oil-water separation layer, and comprising a first mesh structure formed by interweaving oleophilic and hydrophobic threads and hydrophilic and oleophobic threads; wherein the interweaving points of the oleophilic and hydrophobic threads and the hydrophilic and oleophobic threads form oil-collecting positions; Wherein, the aperture of the mesh of the first wire mesh layer is smaller than the interlayer gap between two adjacent oil-water separation layers.

2. The oilfield water treatment filler according to claim 1, characterized in that: The plurality of water outlet holes are aligned and connected along the up-down direction, and the plurality of oil outlet holes are aligned and connected along the up-down direction.

3. The oilfield water treatment filler according to claim 1, characterized in that: The second filler also includes: a second mesh layer, which is arranged at the rear stage of the first mesh layer and includes a second mesh structure formed by interweaving oleophilic and hydrophobic threads and hydrophilic and oleophobic threads, and the mesh aperture of the second mesh structure is larger than that of the first mesh structure.

4. The oilfield water treatment filler according to claim 3 or 1, characterized in that: The material of the oleophilic and hydrophobic threads includes polypropylene or modified polypropylene, and the material of the hydrophilic and oleophobic threads includes stainless steel.

5. The oilfield water treatment filler according to claim 1, characterized in that: include: The filter layer is connected to the front stage of the first wire mesh layer.

6. Oilfield water treatment device, characterized in that: include: A shell body, in which a processing chamber is provided, and a water inlet hole communicating with the processing chamber is provided at one end, and an oil drain hole and a water drain hole communicating with the processing chamber are provided at the other end, and the oil drain hole is located above the water drain hole; The oilfield water treatment filler as described in any one of items 1 to 5 is arranged between the oil discharge hole and the water drainage hole in the treatment chamber.

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