Electrostatic coalescence cyclone pre-separation inner part for a separator

Abstract

This utility model discloses an electrostatic coalescence cyclone pre-separation internal component for a separator, comprising a separation body, an overflow pipe vertically arranged at the top of the separation body and inserted into the interior of the separation body, an inlet pipe tangentially arranged in the separation body, a liquid outlet at the bottom of the separation body, and an electrode component vertically arranged inside the separation body. The electrode component is connected to the bottom end of the separation body and the bottom end of the overflow pipe respectively through an insulating clamp. High-voltage cables are externally connected to the bottom end of the electrode component and the side wall of the separation body, and the other ends of the two high-voltage cables are connected to an electrical control cabinet. By combining electrostatic coalescence and centrifugal separation technologies and setting up a variable electric field structure design, it can fully adapt to the characteristics of the produced fluid in current mining operations. Under the action of centrifugal force and an external electric field, the produced fluid enhances the coalescence effect of dispersed phase water droplets, so that after the produced fluid passes through this separation internal component and is introduced into the oil-water separation equipment, the oil and water phases can be separated quickly.

Description

Technical Field

[0001] This utility model relates to the field of high-efficiency separation technology, specifically to an electrostatic coalescing cyclone pre-separation internal component for a separator. Background Technology

[0002] Existing oil well produced fluids are mostly complex mixtures of oil, gas, water, sand, and other phases. After the produced fluids are extracted from the oil well, they need to undergo gas-liquid separation, oil-water separation, and liquid-solid separation. Currently, in the crude oil processing stage, a three-phase separator with dehydration (salting) is usually used, along with chemical demulsification and other methods to process the produced fluids.

[0003] However, with the development of technology, the amount of produced fluid from oil wells is increasing, but the water content of the produced fluid is also increasing, and the quality of the medium in the produced fluid is deteriorating. Enterprises have developed different high-efficiency three-phase or multi-phase separation equipment according to the properties of different produced fluids from oil wells. Various separation components are also used with these equipment. These separation components are designed based on a single centrifugal principle or electrostatic coalescence technology. Different separation equipment and matching separation components need to be selected for produced fluids with different water contents from oil wells, which increases the workload of the staff. Utility Model Content

[0004] The purpose of this invention is to provide an electrostatic coalescing cyclone pre-separation internal component for a separator, so as to solve the above-mentioned shortcomings in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An electrostatic coalescing cyclone pre-separation internal component for a separator includes a separation body. An overflow pipe is vertically installed at the top of the separation body and inserted into the interior of the separation body. An inlet pipe is tangentially installed in the separation body, and a liquid outlet is opened at the bottom of the separation body. Electrodes are vertically installed inside the separation body. The electrodes are connected to the bottom end of the separation body and the bottom end of the overflow pipe respectively through insulating clamps. High-voltage cables are externally connected to the bottom end of the electrodes and the side wall of the separation body. The other ends of the two high-voltage cables are connected to an electrical control cabinet.

[0007] As described above, the separating body is composed of a columnar body and an inverted cone-shaped body, and the columnar body and the cone-shaped body are arranged coaxially and are both hollow structures.

[0008] As described above, the electrode is a high-voltage electrode, which serves as the positive electrode, and the separation body serves as the negative electrode.

[0009] The voltage between the electrode and the separation body is set between 3kV and 8kV.

[0010] As described above, the electrode is cylindrical and has an insulating layer on its outer side.

[0011] As mentioned above, the electrode is located on the central axis of the separation body.

[0012] As described above, the insulating clamping body includes an upper clamping body and a lower clamping body. The upper clamping body and the lower clamping body have the same structure. The upper clamping body includes an annular belt, which is fixedly connected to the overflow pipe. The annular belt of the lower clamping body is fixedly connected to the bottom of the separation body. Multiple connecting rods are provided on the inner circular surface of the annular belt. The multiple connecting rods are arranged at intervals along the circumference of the annular belt. The other end of the multiple connecting rods is connected to the electrode body, and a channel is formed between adjacent connecting rods for fluid to pass through.

[0013] As described above, the terminal at the bottom of the electrode is connected to the high-voltage cable via an electrode fixing nut, the electrode fixing nut is fitted with an insulating washer, and the high-voltage cable is fitted with an insulating tube.

[0014] As mentioned above, the inlet pipe is detachably connected to the separation body.

[0015] As described above, a diverter is provided inside the inlet pipe. When the liquid in the separator enters the separation body through the inlet pipe, the diverter divides the liquid and disperses the kinetic energy at the inlet pipe.

[0016] The beneficial effects of this utility model are as follows: In the above technical solution, the electrostatic coalescence cyclone pre-separation internal component for a separator provided by this utility model combines electrostatic coalescence and centrifugal separation technologies and sets up a variable electric field structure design, which can fully adapt to the characteristics of the produced fluid in current mining operations. Under the action of centrifugal force and external electric field, the produced fluid enhances the coalescence effect of dispersed phase water droplets, so that after the produced fluid passes through this separation internal component and is introduced into the oil-water separation equipment, the oil and water phases can be separated quickly. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0018] Figure 1 A schematic diagram of the structure of an electrostatic coalescing cyclone pre-separation internal component for a separator provided in this embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the internal structure of the separating body provided in an embodiment of the present utility model;

[0020] Figure 3 Provided for the embodiments of this utility model Figure 2 Enlarged view of point A;

[0021] Figure 4 A schematic diagram illustrating the fit between the inlet pipe and the diverter provided in an embodiment of this utility model;

[0022] Figure 5 A schematic diagram showing the state of the baffle plate blocking the diversion port provided in an embodiment of this utility model.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Separating body; 11. Columnar body; 12. Conical body; 2. Overflow pipe; 3. Inlet pipe; 4. Liquid outlet; 5. Electrode components; 6. Insulating clamping body; 61. Upper clamping body; 611. Annular belt; 612. Connecting rod; 613. Channel; 62. Lower clamping body; 7. High-voltage cable; 8. Electrical control cabinet; 9. Diverting component; 91. Diverting port; 92. Baffle plate; 93. Drive cover. Detailed Implementation

[0025] To enable those skilled in the art to better understand the technical solution of this utility model, the following will be described in conjunction with the appendix. Figure 1-5 This invention will now be described in further detail.

[0026] This utility model embodiment provides an electrostatic coalescence cyclone pre-separation internal component for a separator, including a separation body 1. An overflow pipe 2 is vertically arranged at the top of the separation body 1 and is inserted into the interior of the separation body 1. An inlet pipe 3 is arranged tangentially in the separation body 1. A liquid outlet 4 is opened at the bottom of the separation body 1. An electrode 5 is vertically arranged inside the separation body 1. The electrode 5 is connected to the bottom end of the separation body 1 and the bottom end of the overflow pipe 2 respectively through an insulating clamp 6. A high-voltage cable 7 is externally connected to the bottom end of the electrode 5 and the side wall of the separation body 1. The other ends of the two high-voltage cables 7 are connected to an electrical control cabinet 8.

[0027] Specifically, during the extraction of existing oil wells, the water content of the produced fluid is increasing, and the quality of the medium in the produced fluid is also deteriorating. Therefore, the produced fluid needs to undergo gas-liquid separation, oil-water separation, and liquid-solid separation during the separation process.

[0028] Currently used separation equipment has a variety of separation components. These components are usually developed and set up based on a single centrifugal principle or electrostatic coalescence technology. When it is necessary to perform gas-liquid separation on oil well produced fluids with different water contents, different separation equipment and matching separation components need to be selected, which increases the workload of the staff.

[0029] To address the aforementioned issues, in this embodiment, an inlet pipe 3 is installed tangentially to the separation body 1. When the produced oil from the well enters the separation body 1 through the inlet pipe 3, the gas rotates within the separation body 1. This high-speed rotation of the gas generates a strong centrifugal force. Due to the greater density of the liquid than the gas, the liquid is thrown towards the outer wall of the separation body 1 under the centrifugal force. A liquid film forms on the inner wall of the separation body 1, flowing downwards along the inner wall and finally exiting from the liquid outlet 4 at the bottom. The gas exits the separation body 1 through the opening at the top of the overflow pipe 2. Simultaneously, the electrode 5, when energized, creates a high-frequency electric field within the separation body 1, carrying... The droplets on the inner wall of the separation unit 1 oscillate rapidly in the electric field. The high-frequency oscillation can effectively weaken the emulsion film on the droplet surface and promote droplet coalescence, which can significantly improve the separation efficiency, reduce the use of chemical agents, and has strong adaptability to small-diameter droplets or mixtures with stable interfaces. It can effectively solve the problems that traditional separation methods cannot handle. Compared with existing gas-liquid separation methods, by combining electrostatic coalescence and centrifugal separation technology and setting it into a variable electric field structure design, it can fully adapt to the characteristics of the produced fluid in current mining. Under the action of centrifugal force and external electric field, the coalescence effect of the dispersed phase water droplets is enhanced. After the produced fluid passes through this separation internal component and is introduced into the oil-water separation equipment, the oil and water phases are quickly separated.

[0030] Preferably, the separating body 1 is composed of a columnar body 11 and an inverted conical body 12, wherein the columnar body 11 and the conical body 12 are arranged coaxially and are both hollow structures.

[0031] Specifically, by setting the lower part of the separation body 1 into a cone-shaped structure 12, when the oil well produced fluid enters the separation body 1 through the inlet pipe 3, the design of the cone-shaped structure 12 causes the liquid to gradually concentrate towards the bottom of the cone during rotation. As the radius of the cone gradually decreases, the centrifugal force of the liquid during rotation gradually increases. This design helps to separate the liquid from the gas more effectively. Furthermore, the shape of the cone helps to reduce the re-entrainment of the liquid during rotation. After the liquid forms a liquid film at the bottom of the cone, it can flow more smoothly down the cone wall, reducing the possibility of the liquid being re-entrained by the gas.

[0032] Preferably, the electrode 5 is a high-voltage electrode, the electrode 5 serves as the positive electrode, and the separation body 1 serves as the negative electrode; the voltage between the electrode 5 and the separation body 1 is set between 3kV and 8kV; the electrode 5 is cylindrical, and an insulating layer is provided on the outside of the electrode 5; the electrode 5 is located on the central axis of the separation body 1; the terminal at the bottom of the electrode 5 is connected to the high-voltage cable 7 through an electrode fixing nut, the electrode fixing nut is fitted with an insulating washer, and the high-voltage cable 7 is fitted with an insulating tube.

[0033] Specifically, in this embodiment, since electrode 5 acts as the positive electrode (anode), it can attract negatively charged droplets. When the droplets approach the positive electrode, they are subjected to electric field forces and coalesce. This coalescence can significantly increase the droplet size, thereby enhancing the droplet settling velocity under gravity and improving separation efficiency. Furthermore, the electric field of the positive electrode can reduce the redispersion of droplets during the separation process. After the droplets coalesce under the action of the electric field, they are less likely to be re-entrained by the airflow, thus improving the stability of separation. It should also be noted that in many electrochemical processes, because the anode mainly undergoes oxidation reactions in the electric field, and oxidation reactions are generally... The reduction reaction at the cathode is less likely to cause corrosion than at the cathode, so the positive electrode (anode) is usually more corrosion-resistant than the negative electrode (cathode). As a result, the electrode 5, which serves as the positive electrode, can have a longer service life and reduce maintenance costs. When the voltage between the electrode 5 and the separation body 1 reaches the range of 3kV-8kV, a strong electric field can be generated. The strong electric field can more effectively attract and coalesce charged droplets. The droplets experience a greater electric force in the strong electric field, making it easier for them to coalesce into larger droplets and improve separation efficiency. In the 3kV-8kV electric field, the charged droplets will experience a stronger electrophoretic force, causing them to move towards the electrode and coalesce more quickly.

[0034] Preferably, the insulating clamping body 6 includes an upper clamping body 61 and a lower clamping body 62. The upper clamping body 61 and the lower clamping body 62 have the same structure. The upper clamping body 61 includes an annular belt 611, which is fixedly connected to the overflow pipe 2. The annular belt 611 of the lower clamping body 62 is fixedly connected to the bottom of the separation body 1. A plurality of connecting rods 612 are provided on the inner circular surface of the annular belt 611. The plurality of connecting rods 612 are arranged at intervals along the circumference of the annular belt 611. The other end of the plurality of connecting rods 612 is connected to the electrode body. A channel 613 is formed between adjacent connecting rods 612 for fluid to pass through.

[0035] To facilitate the replacement and maintenance of the inlet pipe 3 and prevent the oil well produced fluid from entering the separation body 1 due to damage to the inlet pipe 3, preferably, the inlet pipe 3 and the separation body 1 are detachably connected. In this embodiment, the inlet pipe 3 and the separation body 1 can be connected by a connection with strong sealing, such as a flange connection.

[0036] In the existing system, the produced fluid from the oil well directly enters the interior of the separation body 1 through the inlet pipe 3. When the flow rate of the produced fluid at the inlet pipe 3 increases, the inlet kinetic energy at the inlet pipe 3 will increase, which can easily lead to violent turbulence and mixing of the liquid at the inlet. This turbulence will blur the interface between the liquid and the gas, increasing the possibility of droplets being rolled up by the gas flow, thereby reducing the flow separation efficiency of the gas-liquid separation.

[0037] To solve the above problems, a diverter 9 is provided inside the inlet pipe 3. When the liquid in the separator enters the separation body 1 through the inlet pipe 3, the diverter 9 diverts the liquid and disperses the kinetic energy at the inlet pipe 3. Preferably, the diverter 9 is plate-shaped and has multiple diverting ports 91. The multiple diverting ports 91 are evenly distributed on the surface of the diverter 9.

[0038] Specifically, when a large flow of liquid enters the inlet pipe 3, the liquid is diverted through the diverter 9. The multiple diverter ports 91 on the diverter 9 divert the liquid to disperse the kinetic energy at the inlet pipe 3, thus preventing excessive kinetic energy at the inlet pipe 3 from affecting the gas-liquid separation effect.

[0039] It should also be noted that when the fluid supply of the produced fluid from the oil well is insufficient, the kinetic energy of the fluid entering the inlet pipe 3 will decrease. After the produced fluid from the oil well is diverted by the diverter 9, the kinetic energy of the fluid entering the separation body 1 will further decrease. When the produced fluid from the oil well with too low inlet kinetic energy enters the separation body 1, the initial velocity of the droplets will be low, and the settling velocity will also be slowed down accordingly. This will easily lead to an increase in the residence time of the droplets in the separation body 1, thereby reducing the separation efficiency.

[0040] Furthermore, a baffle plate 92 is also provided on the plate surface of the diverter 9. The baffle plate 92 is slidably installed on the inlet pipe 3. The baffle plate 92 and the inlet pipe 3 form a dynamic sealing structure. The inlet pipe 3 should be provided with a drive cover 93. The drive cover 93 is provided with a drive mechanism (not shown in the figure). The telescopic end of the drive mechanism is connected to the baffle plate 92. In this embodiment, the drive mechanism is a linear telescopic mechanism, which can be a telescopic cylinder, an electrically controlled telescopic rod, or other equipment. Here, an electrically controlled telescopic rod is preferred. The drive mechanism drives the baffle plate 92 to move downward in the vertical direction. The diverter 9 is a circular plate, and there is only one diverting port 91 at the bottom of the diverter 9. When the drive mechanism reaches the maximum extension distance, the baffle plate 92 will not completely block the bottom diverting port 91 of the diverter 9.

[0041] When the supply of produced fluid from the oil well is large, the baffle plate 92 and the diverter 9 are spaced apart. At this time, the diverter port 91 on the diverter 9 is in the open state, and the diverter 9 diverts the produced fluid from the oil well. When the supply of produced fluid from the oil well decreases (in this embodiment, the change in the supply of produced fluid from the oil well can be detected by a flow sensor, and the flow sensor is communicatively connected to the drive mechanism), the flow sensor sends a signal to the drive mechanism, and the drive mechanism drives the baffle plate 92 to move vertically, so that the baffle plate 92 gradually overlaps with the diverter 9, and the baffle plate 92 gradually blocks the diverter port 91 on the diverter 9. When the structure reaches its maximum elongation, only the lowest diversion port 91 on the diverter 9 is not completely blocked. However, under the action of the baffle plate 92, the orifice diameter of the lowest diversion port 91 on the diverter 9 becomes smaller. At this time, the oil well produced fluid will not be diverted when passing through the diverter 9. Moreover, when passing through the diversion port 91 with the smaller orifice diameter, the oil well produced fluid will be accelerated (the acceleration of fluid through a small-diameter pipe is existing technology, and its principle will not be elaborated). This avoids the situation where the initial velocity of the droplets entering the separation body 1 is low, the settling velocity is correspondingly slowed down, and the residence time of the droplets in the separation body 1 increases, thereby reducing the separation efficiency.

[0042] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An electrostatic coalescing cyclone pre-separation internal component for a separator, characterized in that, The device includes a separation body, an overflow pipe vertically installed at the top of the separation body and inserted into the separation body, an inlet pipe tangentially installed in the separation body, a liquid outlet at the bottom of the separation body, and an electrode component vertically installed inside the separation body. The electrode component is connected to the bottom end of the separation body and the bottom end of the overflow pipe respectively through an insulating clamp. High-voltage cables are externally connected to the bottom end of the electrode component and the side wall of the separation body, and the other ends of the two high-voltage cables are connected to an electrical control cabinet.

2. The electrostatic coalescing cyclone pre-separation internal component for a separator according to claim 1, characterized in that, The separation body is composed of a columnar body and an inverted cone-shaped body, which are arranged coaxially and are both hollow structures.

3. The electrostatic coalescing cyclone pre-separation internal component for a separator according to claim 1, characterized in that, The electrode is a high-voltage electrode, which serves as the positive electrode, while the separation body serves as the negative electrode.

4. The electrostatic coalescing cyclone pre-separation internal component for a separator according to claim 3, characterized in that, The voltage between the electrode and the separation body is set between 3kV and 8kV.

5. The electrostatic coalescing cyclone pre-separation internal component for a separator according to claim 4, characterized in that, The electrode is cylindrical, and an insulating layer is provided on the outside of the electrode.

6. The electrostatic coalescing cyclone pre-separation internal component for a separator according to claim 5, characterized in that, The electrode is located on the central axis of the separation body.

7. The electrostatic coalescing cyclone pre-separation internal component for a separator according to claim 1, characterized in that, The insulating clamping body includes an upper clamping body and a lower clamping body. The upper clamping body and the lower clamping body have the same structure. The upper clamping body includes an annular belt, which is fixedly connected to an overflow pipe. The annular belt of the lower clamping body is fixedly connected to the bottom of the separation body. Multiple connecting rods are provided on the inner circular surface of the annular belt. The multiple connecting rods are arranged at intervals along the circumference of the annular belt. The other end of the multiple connecting rods is connected to the electrode body. A channel is formed between adjacent connecting rods for fluid to pass through.

8. The electrostatic coalescing cyclone pre-separation internal component for a separator according to claim 7, characterized in that, The terminal at the bottom of the electrode is connected to the high-voltage cable via an electrode fixing nut. The electrode fixing nut is fitted with an insulating washer, and the high-voltage cable is fitted with an insulating tube.

9. The electrostatic coalescing cyclone pre-separation internal component for a separator according to claim 1, characterized in that, The inlet pipe is detachably connected to the separation body.

10. The electrostatic coalescing cyclone pre-separation internal component for a separator according to claim 1, characterized in that, The inlet pipe is equipped with a diverter. When the liquid in the separator enters the separation body through the inlet pipe, the diverter divides the liquid and disperses the kinetic energy at the inlet pipe.

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