A spider-web-shaped oil-water emulsion spoiler with spoiler ribs

Abstract

The present application relates to the field of petrochemical equipment, and discloses a spider-web-shaped oil-water emulsion spoiler with spoiler fins, which comprises an oil-water emulsion pipe, a spider-web-shaped spoiler arranged inside the oil-water emulsion pipe, an annular fin fixed to the inner side of the wall of the oil-water emulsion pipe, and a curved fin, wherein the annular fin and the curved fin are distributed along the axis of the oil-water emulsion pipe, the curved fin is arranged close to the spider-web-shaped spoiler, and a gap for fluid flow is formed between the curved fin and the spider-web-shaped spoiler. Through the cooperative action of the annular fin, the curved fin and the spider-web-shaped spoiler, a multi-scale composite spoiler field is constructed. The annular fin can effectively destroy the boundary layer of the pipe wall and enhance the local shear force, so that the oil droplets close to the wall are separated from the pipe wall and guided to the central area of the pipe. The curved fin further guides the fluid to deviate to the center to reduce the flow dead zone. The network structure of the spider-web-shaped spoiler continuously stretches, shears and secondarily breaks the oil droplets. The three work together to significantly improve the uniformity of oil-water mixing and the emulsification efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of petrochemical equipment, in particular to a spider web-shaped oil-water emulsification spoiler with spoiler fins. BACKGROUND

[0002] In the engineering practice of crude oil production, gathering and processing, crude oil often forms oil-water two-phase flow with a certain amount of water. In order to reduce the viscosity of crude oil, improve the fluidity of the fluid and enhance the heat transfer efficiency, emulsification technology is widely used. By fully dispersing the oil phase in the water phase, the goals of reducing the viscosity of crude oil, homogenization and stable transportation are achieved. However, due to the characteristics of high viscosity and low flowability of crude oil, oil droplets are easily attached to the pipe wall and coalesce during flow, forming a local oil film or adhesion layer, which not only hinders the oil-water mixing process and significantly reduces the emulsification efficiency, but also produces a large heat transfer resistance, resulting in a decrease in heating efficiency and an increase in heating energy consumption. At the same time, in long-distance transportation, it aggravates the flow resistance, threatening the safety and stability of pipeline transportation.

[0003] In order to improve the oil-water mixing effect, various internal spoiler structures have been developed in the prior art, such as spiral structure, guide vane and porous insert, etc. These structures can enhance the fluid shear force to a certain extent, promote the breaking and dispersion of oil droplets, but still have many shortcomings: most of the spoiler structures are single in shape, and the breaking effect of the oil droplets attached to the pipe wall is limited, which is difficult to effectively solve the problem of oil droplet adhesion and coalescence; the design of traditional continuous rib structure focuses on heat transfer enhancement, and the effect on multiphase dispersion and micro-scale emulsification is insufficient, which cannot meet the fine emulsification demand; some internal insert structures have high resistance coefficient, which easily leads to an increase in pipeline pressure drop, which is not conducive to energy saving and stability of long-distance crude oil transportation; at the same time, the shear breaking and redispersion ability of the existing spoiler for micro-scale oil droplets is weak, which is difficult to improve the emulsification stability and cannot realize the persistent and efficient emulsification effect. In recent years, bionic structures have attracted industry attention due to their superior performance in spoiler, dispersion and anti-adhesion, such as fluid disturbance structure imitating shark skin and honeycomb structure, etc. However, there is still no composite spoiler structure that can realize wall oil droplet stripping, oil droplet fine breaking, flow disturbance enhancement and heat transfer enhancement at the same time. Especially, how to reasonably introduce microstructures with multi-scale support and network dispersion effect into the rib structure to solve the core technical problems in this field such as oil droplet adhesion and coalescence, insufficient emulsification and uneven heat transfer, is still a technical bottleneck that needs to be broken through in the current petrochemical equipment field. Therefore, it is urgent to develop a new type of oil-water emulsification spoiler, which can realize the effective breaking of wall oil droplets, the strengthening of oil-water two-phase mixing and the improvement of heating efficiency without significantly increasing the flow resistance, thereby significantly improving the oil-water emulsification effect and pipeline transportation performance. SUMMARY

[0004] In view of the deficiencies of the prior art, the present application provides a spider-web-shaped oil-water emulsion spoiler with spoiler ribs, which solves the problems presented in the background art.

[0005] To achieve the above object, the present application is implemented by the following technical scheme: a spider-web-shaped mesh spoiler structure with spoiler ribs, comprising an oil-water emulsion pipe, a spider-web-shaped spoiler arranged inside the oil-water emulsion pipe, an annular rib fixed to the inner side of the wall of the oil-water emulsion pipe, and a curved rib, the annular rib and the curved rib are distributed along the axial direction of the oil-water emulsion pipe, the curved rib is arranged close to the spider-web-shaped spoiler and a gap for fluid flow is formed between them.

[0006] Preferably, the annular rib comprises a first annular rib and a second annular rib arranged in sequence along the axial direction of the oil-water emulsion pipe, and the first annular rib and the second annular rib are distributed in a staggered state.

[0007] Preferably, the first annular rib is arranged at a preset angle with respect to the axis of the oil-water emulsion pipe, the second annular rib is arranged at the same preset angle with respect to the axis of the oil-water emulsion pipe, and the arrangement directions of the first annular rib and the second annular rib form an included angle.

[0008] Preferably, the spider-web-shaped spoiler is arranged in a curved shape, the curved surface of which is curved with respect to the axis of the oil-water emulsion pipe, and the concave surface of the spider-web-shaped spoiler faces the inlet end of the oil-water emulsion pipe.

[0009] Preferably, the curved rib is arranged in the same direction as the curved direction of the spider-web-shaped spoiler, and the concave surface of the curved rib also faces the inlet end of the oil-water emulsion pipe.

[0010] Preferably, the spider-web-shaped spoiler is composed of main ribs and annular connecting ribs, a plurality of main ribs are distributed along the radial direction of the oil-water emulsion pipe, and a plurality of annular connecting ribs are distributed along the axial direction of the oil-water emulsion pipe at intervals, the annular connecting ribs are fixedly connected with all the main ribs to form a mesh structure.

[0011] Preferably, the curved rib is arranged opposite to the main rib of the spider-web-shaped spoiler, the gap size between them is adapted to the fluid flow demand, and it is ensured that the fluid can flow smoothly and form disturbance.

[0012] Preferably, the annular rib is arranged in a preset group number as a unit along the axial direction of the oil-water emulsion pipe, each group of annular ribs comprises at least one first annular rib and at least one second annular rib, and at least two groups of annular ribs are arranged between adjacent two spider-web-shaped spoilers.

[0013] Preferably, the annular rib is arranged protruding from the inner wall of the oil-water emulsion pipe, the extension length of the annular rib is adapted to the disturbance demand, and it can destroy the boundary layer formed by the fluid on the pipe wall.

[0014] Preferably, the main rib extends along the radial direction of the oil-water emulsification pipe, one end of the main rib is close to the inner wall of the oil-water emulsification pipe, and the other end of the main rib extends towards the axis direction of the oil-water emulsification pipe, the annular connecting rib is arranged around the axis of the oil-water emulsification pipe, and the annular connecting rib is fixedly connected with the main rib to form a multi-scale grid structure.

[0015] The present application provides a spider web-shaped oil-water emulsification spoiler with spoiler ribs.

[0016] 1. The present application cooperates the annular rib, the curved rib and the spider web-shaped spoiler to construct a multi-scale composite spoiler field, the annular rib can effectively destroy the boundary layer of the pipe wall and enhance the local shear force, so that the wall oil droplets are separated from the pipe wall and guided to the central area of the pipeline, the curved rib further guides the fluid to the center to reduce the flow dead zone, and the net structure of the spider web-shaped spoiler continuously stretches, shears and secondarily breaks the oil droplets, and the three work together to significantly improve the oil-water mixing uniformity and emulsification efficiency, improve the heat transfer effect, reduce the heating energy consumption, and ensure the safety and stability of pipeline transportation.

[0017] 2. The present application adopts modular design, the components are stably connected and the structure is simple, the arrangement mode of the annular rib and the curved rib and the structural design of the spider web-shaped spoiler can strengthen the spoiler effect without significantly increasing the flow resistance, avoid excessive increase of pipeline pressure drop, and are easy to process, manufacture and maintain, can adapt to various engineering conditions such as crude oil gathering and transportation, heavy oil viscosity reduction and oil-water treatment, have wide application range, and can reduce use and maintenance cost on the basis of improving emulsification performance. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the overall pipeline axis sectional view of the present application;

[0019] Figure 2 It is the overall pipeline cross-sectional view of the present application;

[0020] Figure 3 It is the position schematic view of the spider web-shaped spoiler and the curved rib of the present application;

[0021] Figure 4 It is the first annular rib structure schematic view of the present application;

[0022] Figure 5 It is the schematic view of the spider web-shaped spoiler and the curved rib arranged in the pipeline of the present application;

[0023] Figure 6 It is the numerical simulation streamline nephogram of the embodiment of the present application;

[0024] Figure 7 It is the numerical simulation mixing nephogram of the embodiment of the present application.

[0025] 1, oil-water emulsification tube; 2, spider-web-shaped spoiler; 3, annular rib; 3-1, first annular rib; 3-2, second annular rib; 4, curved rib; 5, main rib; 6, annular connecting rib. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the present application specification. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0027] Please refer to the drawings in the present application specification Figure 1 - the drawings in the present application specification Figure 7 The spider-web-shaped net-shaped spoiler structure with spoiler ribs provided by the embodiments of the present application comprises an oil-water emulsification tube 1, a spider-web-shaped spoiler 2 arranged inside the oil-water emulsification tube 1, annular ribs 3 fixed to the inner side of the wall of the oil-water emulsification tube 1, and curved ribs 4. The annular ribs 3 and the curved ribs 4 are distributed along the axial direction of the oil-water emulsification tube 1. The curved ribs 4 are arranged close to the spider-web-shaped spoiler 2 and form a gap for fluid flow between them. The annular ribs 3 comprise a first annular rib 3-1 and a second annular rib 3-2 arranged in sequence along the axial direction of the oil-water emulsification tube 1. The first annular rib 3-1 and the second annular rib 3-2 are distributed in a staggered state.

[0028] Specifically, when the fluid flows in the oil-water emulsification tube 1, the first annular rib 3-1 and the second annular rib 3-2 in the annular rib 3 are arranged in a staggered state, which destroys the boundary layer formed by the fluid on the wall, enhances the local shear force, and makes the oil droplets originally adhering to the wall separate from the wall and be guided to the central area of the pipeline. The curved rib 4 further guides the fluid to deviate from the wall by means of the arrangement close to the spider-web-shaped spoiler 2 and the flow gap between them, avoids the generation of flow dead zones, and provides guidance for the fluid flow to the spider-web-shaped spoiler 2. The spider-web-shaped spoiler 2 comprises a net-shaped structure formed by the main rib 5 and the annular connecting rib 6, which exerts continuous stretching and shearing action on the entering fluid and oil droplets, realizes the secondary breaking of the oil droplets, and finally promotes the full mixing of the oil-water two-phase and improves the emulsification effect and heat transfer efficiency.

[0029] The first annular rib 3-1 is arranged at a preset angle with respect to the axis of the oil-water emulsification tube 1, and the second annular rib 3-2 is arranged at the same preset angle with respect to the axis of the oil-water emulsification tube 1. The arrangement directions of the first annular rib 3-1 and the second annular rib 3-2 form an included angle. The spider-web-shaped spoiler 2 is arranged in a curved shape, and the curved surface of the spider-web-shaped spoiler 2 is curved with respect to the axis of the oil-water emulsification tube 1. The concave surface of the spider-web-shaped spoiler 2 faces the inlet end of the oil-water emulsification tube 1.

[0030] Specifically, the first annular rib 3-1 and the second annular rib 3-2 are both at the same preset angle with the oil-water emulsification tube 1 axis, and the arrangement directions of the two form an included angle, which can form an alternating disturbance on the fluid flow path, further enhance the shear action near the tube wall, more efficiently destroy the wall surface boundary layer, avoid the attachment and coalescence of oil droplets on the tube wall, and at the same time prolong the disturbance process of the fluid in the tube, laying a foundation for subsequent emulsification; the spider web-shaped spoiler 2 is curved with the oil-water emulsification tube 1 axis as the reference and the concave surface faces the inlet end, so that the fluid can be smoothly introduced into the network structure area of the spider web-shaped spoiler 2 after entering from the inlet. The curved shape can guide the fluid to form a centripetal flow trend, and the grid formed by the main rib 5 and the annular connecting rib 6 can exert directional and continuous stretching and shearing force on the fluid and oil droplets, improving the accuracy and sufficiency of oil droplet breaking, and thus optimizing the emulsification effect.

[0031] The curved rib 4 is consistent with the bending direction of the spider web-shaped spoiler 2, and the concave surface of the curved rib 4 also faces the inlet end of the oil-water emulsification tube 1. The spider web-shaped spoiler 2 is composed of the main rib 5 and the annular connecting rib 6. The main rib 5 is distributed radially along the oil-water emulsification tube 1, and the annular connecting rib 6 is distributed axially along the oil-water emulsification tube 1. The annular connecting rib 6 is fixedly connected with all the main ribs 5 to form a network structure.

[0032] Specifically, the curved rib 4 and the spider web-shaped spoiler 2 maintain the same bending direction, and the concave surfaces of the two face the inlet end of the oil-water emulsification tube 1. This design can guide the fluid entering from the inlet to form a smooth centripetal flow trajectory, avoid turbulent impact of the fluid during flow, and further strengthen the guiding effect on the fluid near the tube wall to ensure efficient convergence of the fluid into the action area of the spider web-shaped spoiler 2; the spider web-shaped spoiler 2 is fixedly connected by the main rib 5 distributed radially along the oil-water emulsification tube 1 and the annular connecting rib 6 distributed axially to form a network structure. This network structure builds a multi-scale disturbance space. When the fluid flows through, the main rib 5 and the annular connecting rib 6 jointly exert omnidirectional stretching and shearing force on the fluid and oil droplets, realizing fine breaking and uniform dispersion of the oil droplets, and thus improving the sufficiency and stability of oil-water emulsification.

[0033] The curved rib 4 is arranged opposite to the main rib 5 of the spider web-shaped spoiler 2, and the gap size between the two is matched with the fluid flow demand to ensure that the fluid can smoothly pass through and form a disturbance.

[0034] Specifically, the curved rib 4 is arranged opposite to the main rib 5 of the spider-web-shaped spoiler 2, and a gap between the two is designed to meet the fluid flow demand, which not only ensures the smooth passage of fluid and avoids the increase of pipeline pressure drop caused by flow obstruction, but also forms local disturbance when the fluid flows through the gap, further enhancing the turbulent kinetic energy of the fluid; at the same time, the gap can guide the fluid near the pipe wall to accurately flow into the mesh structure region formed by the main rib 5 and the annular connecting rib 6, so that the oil droplets are fully broken down under the action of gap disturbance and mesh structure stretching and shearing, thereby improving the uniformity and emulsification stability of oil-water mixing.

[0035] The annular rib 3 is axially spaced apart along the oil-water emulsification pipe 1 in units of a preset group, each group of annular ribs 3 includes at least one first annular rib 3-1 and at least one second annular rib 3-2, and at least two groups of annular ribs 3 are arranged between adjacent two spider-web-shaped spoilers 2. The annular rib 3 protrudes from the inner wall of the oil-water emulsification pipe 1, and the extension length of the annular rib 3 is adapted to the disturbance demand and can destroy the boundary layer formed by the fluid on the pipe wall.

[0036] Specifically, the annular rib 3 is axially spaced apart along the oil-water emulsification pipe 1 in units of a preset group, and each group contains at least one first annular rib 3-1 and at least one second annular rib 3-2, and at least two groups of annular ribs 3 are arranged between adjacent two spider-web-shaped spoilers 2, which can form a segmented and multi-round disturbance effect on the fluid flow path, so that the fluid experiences multiple shearing and guiding before reaching the spider-web-shaped spoiler 2, laying a foundation for subsequent oil droplet breaking and emulsification; at the same time, the annular rib 3 protrudes from the inner wall of the oil-water emulsification pipe 1 and the extension length is adapted to the disturbance demand, and the protruding structure can directly penetrate the boundary layer formed by the fluid on the pipe wall, break the adhesion condition of the oil droplets on the wall surface, avoid the formation of oil film, and further reduce the heat transfer resistance. Combined with the design of multiple groups of spaced distribution, the fluid disturbance near the pipe wall is continuously strengthened, the overall disturbance and heat exchange effect are improved, and good preconditions are provided for the fine breaking of oil droplets by the subsequent spider-web-shaped spoiler 2.

[0037] The main rib 5 extends along the radial direction of the oil-water emulsification pipe 1, one end of which is close to the inner wall of the oil-water emulsification pipe 1, and the other end extends towards the axis direction of the oil-water emulsification pipe 1. The annular connecting rib 6 is arranged around the axis of the oil-water emulsification pipe 1, and the annular connecting rib 6 and the main rib 5 are fixedly connected to form a multi-scale mesh structure.

[0038] Specifically, the main rib 5 extends radially along the oil-water emulsification pipe 1, with one end close to the pipe wall and the other end facing the pipe axis. The annular connecting rib 6 is arranged around the axis of the oil-water emulsification pipe 1 and is fixedly connected to the main rib 5. Together, they form a multi-scale grid structure. This structure can form a three-dimensional disturbance space inside the oil-water emulsification pipe 1. When the fluid flows through, the main rib 5 can exert radial shearing force on the fluid, while the annular connecting rib 6 applies circumferential constraint and disturbance. The two work together to subject the oil droplets to all-round, multi-dimensional stretching and shearing forces in the grid space, achieving fine breakage of the oil droplets. At the same time, the multi-scale grid can adapt to the breakage requirements of oil droplets of different sizes, further improving the uniformity of oil-water mixing and emulsification stability.

[0039] To illustrate the beneficial effects of this invention, fluent numerical simulation was used to obtain the following results: Figure 6 and Figure 7 The simulated cloud map shown is from... Figure 6 The streamline diagram shows that this structural design allows for the existence of numerous small-scale eddies in the fluid, which improves the oil-water emulsification effect. From... Figure 4 Numerical simulation of the mixing cloud diagram shows that after the oil and water enter from the inlet, the mixing degree is relatively uniform under the structural turbulence of the invention. At the same time, it can be observed that near the pipe wall, the fluid gradually moves towards the central axis of the pipe under the action of the annular rib 3 and the curved rib 4, which can greatly improve the emulsification efficiency and utilization rate.

[0040] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A spiderweb-shaped mesh-like turbulence-disrupting structure with turbulence-disrupting ribs, characterized in that, It includes an oil-water emulsification pipe (1), a spider web-shaped flow disruptor (2) disposed inside the oil-water emulsification pipe (1), an annular rib (3) fixed to the inner side of the pipe wall of the oil-water emulsification pipe (1), and a curved rib (4). The annular rib (3) and the curved rib (4) are both distributed along the axial direction of the oil-water emulsification pipe (1). The curved rib (4) is arranged close to the spider web-shaped flow disruptor (2) and a gap for fluid flow is formed between the two. The spiderweb-shaped flow disruptor (2) consists of main ribs (5) and annular connecting ribs (6). Several main ribs (5) are radially distributed along the oil-water emulsion pipe (1), and several annular connecting ribs (6) are axially spaced along the oil-water emulsion pipe (1). The annular connecting ribs (6) are fixedly connected to all the main ribs (5) to form a mesh structure. The curved ribs (4) are arranged opposite to the main ribs (5) of the spiderweb-shaped flow disruptor (2), and the gap between them is adapted to the fluid flow requirements to ensure that the fluid can pass smoothly and form a disturbance. The main ribs (5) extend radially along the oil-water emulsion pipe (1), with one end close to the inner wall of the oil-water emulsion pipe (1) and the other end extending toward the axis of the oil-water emulsion pipe (1). The annular connecting ribs (6) are arranged around the axis of the oil-water emulsion pipe (1), and the annular connecting ribs (6) are fixedly connected to the main ribs (5) to form a multi-scale mesh structure. The annular rib (3) includes a first annular rib (3-1) and a second annular rib (3-2) arranged sequentially along the axial direction of the oil-water emulsion pipe (1), with the first annular rib (3-1) and the second annular rib (3-2) distributed in an alternating manner. The first annular rib (3-1) is set at a preset angle to the axis of the oil-water emulsification pipe (1), and the second annular rib (3-2) is set at the same preset angle to the axis of the oil-water emulsification pipe (1). The arrangement directions of the first annular rib (3-1) and the second annular rib (3-2) form an angle. The annular rib (3) protrudes from the inner wall of the oil-water emulsion pipe (1). The extension length of the annular rib (3) is adapted to the turbulence requirements and can destroy the boundary layer formed by the fluid on the pipe wall. The spiderweb-shaped spoiler (2) is arranged in a curved shape. The arc surface of the spiderweb-shaped spoiler (2) is curved with the axis of the oil-water emulsion pipe (1) as the reference. The curved rib (4) is consistent with the bending direction of the spiderweb-shaped spoiler (2).

2. The spiderweb-shaped mesh turbulence-disrupting structure with turbulence-disrupting ribs according to claim 1, characterized in that... The concave surface of the spider web-shaped baffle (2) faces the inlet end of the oil-water emulsion pipe (1).

3. The spiderweb-shaped mesh turbulence-disrupting structure with turbulence-disrupting ribs according to claim 1, characterized in that... The concave surface of the curved rib (4) also faces the inlet end of the oil-water emulsion pipe (1).

4. The spiderweb-shaped mesh turbulence-disrupting structure with turbulence-disrupting ribs according to claim 1, characterized in that... The annular ribs (3) are distributed axially along the oil-water emulsion pipe (1) in a predetermined number of units. Each group of annular ribs (3) includes at least one first annular rib (3-1) and at least one second annular rib (3-2). At least two groups of annular ribs (3) are provided between two adjacent spider web-shaped baffles (2).

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