Oil-gas-water three-phase separation device

Abstract

The invention discloses an oil-gas-water three-phase separation device, and belongs to the technical field of separation devices.The oil-gas-water three-phase separation device comprises a tank body, a first overflow baffle and a stirring assembly, the stirring assembly comprises a driving part and a stirring part, the stirring part can rotate around the axis of the stirring part under driving of the driving part, and the stirring part has the double functions of stirring and scraping; the stirring piece can not only prevent impurities and oil from hardening on the inner wall of the tank body through rotation, but also scrape and remove hardened impurities on the inner wall, so that the interior of the tank body is kept clean, and the later maintenance cost is reduced; moreover, fluid movement generated by stirring can promote further separation of oil, water and gas, so that the oil and the water are layered better under the action of density difference, and the gas can move upwards faster and is discharged through an exhaust port, so that the oil-gas-water separation efficiency is improved; meanwhile, the stirring piece located in the oil storage chamber can keep the fluidity of the oil through stirring, prevent the oil from hardening and blocking the oil discharge outlet, and ensure that the oil can be discharged smoothly.

Description

Technical Field

[0001] This invention relates to the field of separation device technology, and in particular to an oil-gas-water three-phase separation device. Background Technology

[0002] Oil-gas-water three-phase separators are among the most commonly used equipment in oilfield development and production. They utilize the different physical properties of oil, gas, and water to achieve three-phase separation by causing them to settle in the separator. These three-phase separators are installed under the pump in oil and water wells in oilfields and come in three forms: vertical, horizontal, and spherical. For ease of transport, horizontal separators are usually the most commonly used.

[0003] The existing horizontal three-phase separation device is mainly equipped with an overflow baffle, an inlet, a drain outlet, an exhaust outlet, and an oil outlet. The raw liquid mixed with oil, gas, and water enters the tank through the inlet. Due to the different densities of oil, gas, and water, they will naturally separate into layers. Water, due to its higher density, sinks to the bottom and is discharged through the drain outlet; gas moves upward and is discharged through the exhaust outlet; while oil crosses the overflow baffle during the separation process, accumulates and flows into the oil storage chamber, and is then discharged through the oil outlet, thereby achieving the separation of the three phases of oil, gas, and water.

[0004] However, the above-mentioned three-phase separation device relies solely on the density difference for natural stratification, resulting in low separation efficiency. In particular, the gas has a low density and a relatively small content in the mixture. Compared with oil and water, it experiences less buoyancy during the separation process, resulting in insufficient upward momentum and slow separation speed. Secondly, the impurities generated by oil-water separation are prone to caking on the wall of the separation cylinder, which not only affects the effective volume of the separation cylinder but also increases the maintenance cost of the equipment. Furthermore, the oil is prone to caking, blocking the oil drain port and making it difficult to discharge the oil. Summary of the Invention

[0005] The purpose of this invention is to provide an oil-gas-water three-phase separation device that can improve the oil-gas-water separation efficiency, prevent impurities and oil from accumulating on the wall of the separation cylinder, reduce subsequent maintenance costs, and ensure smooth oil discharge.

[0006] Based on the above concept, the technical solution adopted by this invention is as follows:

[0007] An oil-gas-water three-phase separation unit includes:

[0008] The tank body is provided with a separation chamber, and the tank body is provided with an inlet, an exhaust port, a drain port and an oil drain port;

[0009] A first overflow baffle is disposed in the separation chamber, dividing the separation chamber into a horizontally arranged layered chamber and an oil storage chamber. The layered chamber and the oil storage chamber are connected through the space above the first overflow baffle. The inlet and the outlet are respectively connected to the layered chamber, the drain outlet is connected to the bottom of the layered chamber, and the oil outlet is connected to the bottom of the oil storage chamber.

[0010] The stirring assembly includes a drive component and a stirring component. The stirring component extends into the bottom of the layered chamber and the oil storage chamber and is connected to the output end of the drive component. The axis of the stirring component is parallel to the axis of the tank body. The stirring component can rotate around its own axis under the drive of the drive component, scraping impurities on the inner walls of the layered chamber and the oil storage chamber.

[0011] Furthermore, the oil-gas-water three-phase separation device also includes a second overflow baffle, which is disposed in the layered chamber and divides the layered chamber into multiple sub-layered chambers. Adjacent sub-layered chambers are connected through the space above the second overflow baffle. The multiple sub-layered chambers and the oil storage chamber are arranged side by side in the horizontal direction. The inlet is connected to the sub-layered chamber farthest from the oil storage chamber. The vertical distance from the top of the second overflow baffle to the bottom wall of the separation chamber is not less than the vertical distance from the top of the first overflow baffle to the bottom wall of the separation chamber.

[0012] Furthermore, multiple overflow baffles are provided, and the multiple overflow baffles are arranged sequentially at intervals along the horizontal direction.

[0013] Furthermore, both the first overflow baffle and the second overflow baffle are vertically arranged.

[0014] Furthermore, the stirring component includes a stirring shaft and a plurality of stirring paddles. The stirring shaft is connected to the output end of the driving component and extends horizontally from one side of the tank to the opposite side. The plurality of stirring paddles are arranged sequentially at intervals along the stirring shaft in a horizontal direction.

[0015] Furthermore, the oil-gas-water three-phase separation device also includes a baffle, which is disposed in the layered chamber and directly opposite the inlet.

[0016] Furthermore, the oil-gas-water three-phase separation device also includes a rectifier, which is disposed at the top of the layered chamber and located between the inlet and the outlet.

[0017] Furthermore, the oil-gas-water three-phase separation device also includes an air intake assembly, which includes a mist eliminator and a downflow pipe. The mist eliminator is located at the top of the layered chamber and can cover the exhaust port. The mist eliminator has a water outlet on the side facing the agitator, and one end of the downflow pipe is connected to the water outlet.

[0018] Furthermore, the oil-gas-water three-phase separation device also includes a drain pipe, which is connected to the drain outlet.

[0019] Furthermore, the oil-gas-water three-phase separation device also includes an oil drain pipe, which is connected to the oil drain port.

[0020] The beneficial effects of this invention are:

[0021] This invention proposes an oil-gas-water three-phase separation device, which includes a stirring assembly comprising a drive component and a stirring component. Driven by the drive component, the stirring component rotates around its own axis. This stirring component performs both stirring and scraping functions. The rotation of the stirring component not only prevents impurities and oil from depositing and hardening on the inner wall of the tank, but also scrapes away hardened oil and impurities, thus maintaining the cleanliness of the tank interior and reducing subsequent maintenance costs. Furthermore, the fluid motion generated by the rotation of the stirring component disrupts any potential emulsion layer, promoting further separation of oil, water, and gas. This allows oil and water to better separate under the influence of density differences, and the gas can move upwards more quickly and be discharged through the exhaust port, thereby improving the oil-gas-water separation efficiency. Simultaneously, the stirring component located in the oil storage chamber maintains the fluidity of the oil through stirring, preventing oil from hardening and blocking the oil outlet, ensuring smooth oil discharge. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the oil-gas-water three-phase separation device provided in a specific embodiment of the present invention;

[0023] Figure 2 This is a cross-sectional view of the oil-gas-water three-phase separation device provided in a specific embodiment of the present invention;

[0024] Figure 3 This is a partial structural diagram of the oil-gas-water three-phase separation device provided in a specific embodiment of the present invention.

[0025] In the picture:

[0026] 1. Tank body;

[0027] 2. First overflow baffle;

[0028] 3. Stirring assembly; 31. Drive component; 32. Stirring component; 321. Stirring shaft; 322. Stirring paddle;

[0029] 4. Second overflow baffle;

[0030] 5. Baffle;

[0031] 6. Rectifier;

[0032] 7. Intake assembly; 71. Fog eliminator; 72. Downflow pipe;

[0033] 8. Drainage pipe;

[0034] 9. Oil drain pipe;

[0035] 10. Input tube;

[0036] 11. Exhaust pipe;

[0037] 12. Support;

[0038] 100. Separation chamber; 101. Layered chamber; 102. Oil storage chamber. Detailed Implementation

[0039] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0040] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0041] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0042] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0043] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0044] like Figures 1-3 As shown, the present invention provides an oil-gas-water three-phase separation device, including a tank 1, a first overflow baffle 2, and a stirring assembly 3. A separation chamber 100 is provided inside the tank 1, and the tank 1 is provided with an inlet, an outlet, a drain outlet, and an oil outlet. The first overflow baffle 2 is disposed in the separation chamber 100, dividing the separation chamber 100 into a horizontally arranged layered chamber 101 and an oil storage chamber 102. The layered chamber 101 and the oil storage chamber 102 are connected through the space above the first overflow baffle 2. The inlet and outlet are separate. The drain outlet is connected to the bottom of the layered chamber 101, and the oil outlet is connected to the bottom of the oil storage chamber 102. The stirring assembly 3 includes a driving component 31 and a stirring component 32. The stirring component 32 extends into the bottom of the layered chamber 101 and the oil storage chamber 102 and is connected to the output end of the driving component 31. The axis of the stirring component 32 is parallel to the axis of the tank body 1. Under the drive of the driving component 31, the stirring component 32 can rotate around its own axis and scrape the impurities on the inner wall of the layered chamber 101 and the oil storage chamber 102.

[0045] The first overflow baffle 2 divides the separation chamber 100 into a stratification chamber 101 and an oil storage chamber 102, so that the three-phase separation process of oil, gas and water forms an orderly process of "pretreatment-collection" in space. The stratification chamber 101 is used for the initial stratification of the oil, gas and water mixture. The oil that has been initially separated in the stratification chamber 101 will overflow from above the first overflow baffle 2 to the oil storage chamber 102. The oil storage chamber 102 is specifically used to collect the oil that flows in after separation from the stratification chamber 101 and provides a relatively independent and stable storage space for the oil.

[0046] The agitator 32 has both agitation and scraping functions. By rotating, the agitator 32 can not only prevent impurities and oil from depositing and hardening on the inner walls of the stratification chamber 101 and the oil storage chamber 102, but also scrape away the impurities and oil that have already hardened on the inner walls, thereby keeping the interior of the stratification chamber 101 and the oil storage chamber 102 clean and reducing later maintenance costs. In addition, the fluid movement generated by the rotation of the agitator will destroy any emulsion layer that may form, promote further separation of oil, gas and water, and allow oil and water to separate better under the action of density difference. Gas can also move upward more quickly and be discharged through the exhaust port, thereby improving the separation efficiency of oil, gas and water. At the same time, the agitator 32 located in the oil storage chamber 102 can maintain the fluidity of the oil by agitation, prevent oil from hardening and blocking the oil outlet, and ensure that the oil can be discharged smoothly.

[0047] Specifically, such as Figures 2-3 As shown, the oil-gas-water three-phase separation device also includes a second overflow baffle 4, which is disposed in the layered chamber 101 and divides the layered chamber 101 into multiple sub-layered chambers. Adjacent sub-layered chambers are connected through the space above the second overflow baffle 4. The multiple sub-layered chambers and the oil storage chamber 102 are arranged side by side in the horizontal direction. The inlet is connected to the sub-layered chamber farthest from the oil storage chamber 102. The vertical distance from the top of the second overflow baffle 4 to the bottom wall of the separation chamber 100 is not less than the vertical distance from the top of the first overflow baffle 2 to the bottom wall of the separation chamber 100.

[0048] The sub-layers are named according to their distance from the oil storage chamber 102. The one furthest from the oil storage chamber 102 is named the first sub-layer, the second furthest is named the second sub-layer, and so on. The oil-gas-water mixture first enters the first sub-layer through the inlet. Under the action of gravity and the stirring element 32, it begins to separate. When the liquid level rises to a certain level, the uppermost layer of oil will overflow the second overflow baffle 4 and enter the second sub-layer. When the water level in the first sub-layer reaches the top of the second overflow baffle 4, the mixed liquid is then injected, and the oil and water will overflow together. The oil enters the second sub-layer chamber through the second overflow baffle 4. At this time, the existing oil and the newly entered oil-water mixture in the second sub-layer chamber are separated again. The oil and water overflow in the order of upper and lower layers. The subsequent sub-layer chambers repeat the above process. During this process, the oil gradually accumulates through stratification and moves towards the oil storage chamber 102. The water gradually moves towards the sub-layer chamber adjacent to the oil storage chamber 102 and is discharged from the drain. Throughout the process of the oil-gas-water mixture being stratified and overflowed in each sub-layer chamber, the gas is constantly being separated, ultimately achieving precise separation of the three phases of oil, gas and water.

[0049] The vertical distance from the top of the second overflow baffle 4 to the bottom wall of the separation chamber 100 is not less than the vertical distance from the top of the first overflow baffle 2 to the bottom wall of the separation chamber 100. This ensures that the oil flows unidirectionally into the oil storage chamber 102 along multiple sub-layer chambers. If the vertical distance from the top of the first overflow baffle 2 to the bottom wall of the separation chamber 100 is greater than the vertical distance from the top of the second overflow baffle 4 to the bottom wall of the separation chamber 100, the oil will not flow directly into the oil storage chamber 102. Instead, it will overflow into the oil storage chamber 102 only when the oil in the layered chamber 101 reaches the top of the first overflow baffle 2. This results in a delay in the overflow of the oil. Because the oil stays in the layered chamber 101 for too long, the separated oil may mix with the water phase again, or impurities may be re-mixed in due to factors such as stirring and liquid level fluctuations, reducing the oil separation quality. This contradicts the purpose of setting the second overflow baffle 4 to improve the oil separation quality.

[0050] In this embodiment, the tank 1 is a cylindrical structure that extends horizontally along the axis. The inlet is located on the side of the tank 1 and is connected to the top of the sub-layer chamber furthest from the oil storage chamber 102. This allows the mixture to flow downwards gradually under the action of gravity after entering this sub-layer chamber. Gas can more easily escape from the oil-gas-water mixture and diffuse upwards, while oil and water further separate into layers during the downward flow.

[0051] More specifically, multiple second overflow baffles 4 are provided, and multiple second overflow baffles 4 are arranged sequentially at intervals along the horizontal direction, further subdividing the layered chamber 101 into more sub-layered chambers, thereby increasing the separation levels. Each time the separation passes through a sub-layered chamber, it is a further layering and separation process, which ultimately makes the separation of oil, gas and water phases more thorough and the separation accuracy higher.

[0052] like Figures 2-3 As shown, in this embodiment, four second overflow baffles 4 are provided, which divide the stratification chamber 101 into five sub-stratification chambers. The five sub-stratification chambers are distributed in sequence along the horizontal direction, and each sub-stratification chamber is provided with a stirring element 32. The inlet is connected to the sub-stratification chamber farthest from the oil storage chamber 102, and the exhaust port and drain port are respectively connected to the sub-stratification chamber adjacent to the oil storage chamber 102, so as to ensure that the oil-gas-water mixture passes through the separation of the five sub-stratification chambers completely.

[0053] In other embodiments, the number of second overflow baffles 4 can be flexibly adjusted according to actual needs. If the separation accuracy requirement is not particularly high, or the composition of the oil-gas-water mixture is relatively simple, it may be necessary to set fewer second overflow baffles 4. For example, setting 2-3 second overflow baffles 4 to divide the separation chamber 101 into 3-4 sub-separation chambers can achieve basic separation function while reducing equipment cost and device complexity. Conversely, if the oil-gas-water mixture being processed has complex composition, many impurities, or extremely high separation accuracy requirements, it may be necessary to increase the number of second overflow baffles 4. For example, setting more than 6 second overflow baffles 4 to form more than 7 sub-separation chambers can better separate the three phases of oil, gas, and water.

[0054] More specifically, such as Figure 2 As shown, the first overflow baffle 2 and the second overflow baffle 4 are both vertically arranged. Since the first overflow baffle 2 and the second overflow baffle 4 are vertical, when the stirring component 32 rotates around its own axis, its stirring range will not be affected by factors such as the tilt of the first overflow baffle 2 and the second overflow baffle 4. It can uniformly stir each sub-layer chamber in the layered chamber 101 and the bottom of the oil storage chamber 102.

[0055] In this embodiment, the vertical height of the first overflow baffle 2 is the same as the vertical height of the second overflow baffle 4.

[0056] Specifically, such as Figure 3 As shown, the stirring component 32 includes a stirring shaft 321 and a plurality of stirring paddles 322. The stirring shaft 321 is connected to the output end of the driving component 31 and extends horizontally from one side of the tank 1 to the opposite side. The plurality of stirring paddles 322 are arranged sequentially and spaced apart on the stirring shaft 321 in a horizontal direction. The stirring shaft 321 extends from one side of the tank body 1, passing through five second overflow baffles 4, a first overflow baffle 2, and the other side of the tank body 1 in sequence. It drives the stirring paddle 322 to simultaneously stir, separate, and clean the stratification chamber 101 and the oil storage chamber 102, improving the overall working efficiency. Multiple stirring paddles 322 are arranged at intervals along the horizontal direction on the stirring shaft 321, increasing the contact area for stirring and scraping. During the stirring process, the stirring paddles 322 at different positions can act on the liquid in different areas, so that the liquid can be stirred at all positions in the horizontal direction, thereby avoiding uneven stirring in some areas. This is conducive to the full separation of the three phases of oil, gas, and water, and can also scrape off the impurities attached to the inner walls of the stratification chamber 101 and the oil storage chamber 102 more cleanly, further ensuring the cleanliness of the inside of the tank body 1 and reducing the later maintenance costs.

[0057] In this embodiment, a mechanical seal is used between the stirring shaft 321 and the tank body 1, the first overflow baffle 2 and the second overflow baffle 4. A moving ring is provided on the stirring shaft 321, which rotates with the stirring shaft 321. A stationary ring is fixed on the tank body 1, the first overflow baffle 2 and the second overflow baffle 4. The moving ring and the stationary ring are tightly fitted together by the axial force applied by the spring to form a sealing surface, which ensures that the stirring shaft 321 can rotate around itself while having good sealing performance.

[0058] In this embodiment, the separation chamber 100 is a cylindrical structure that extends horizontally along its axis. The radius of the stirring paddle 322 is equal to the distance between the horizontal axis of the stirring shaft 321 and the bottom wall of the separation chamber 100. Each sub-layer chamber and oil storage chamber 102 is equipped with a stirring paddle 322 to ensure that the stirring paddle 322 can scrape the inner wall of each sub-layer chamber and oil storage chamber 102, thereby making the hardened material on the inner wall more thoroughly scraped. At the same time, the diameter of the stirring paddle 322 is not greater than the vertical height of the first overflow baffle 2 and the second overflow baffle 4, which can prevent the liquid from being carried to a higher position by the stirring paddle 322 during the stirring process, and then splashing over the first overflow baffle 2 or the second overflow baffle 4 to other areas.

[0059] In this embodiment, the stirring paddle 322 includes multiple blades arranged circumferentially on the stirring shaft 321. When the stirring shaft 321 rotates, it can stir the liquid from different angles. Compared with a single blade, it increases the stirring force and range, allowing the liquid to mix and flow more fully in each sub-layer chamber and oil storage chamber 102. This helps to promote further separation of the three phases of oil, gas and water. Furthermore, the stirring paddle 322 can more comprehensively contact the inner wall of each sub-layer chamber and oil storage chamber 102. The synergistic effect of multiple blades makes scraping more thorough, effectively preventing impurities and oil from depositing and caking on the inner wall of each sub-layer chamber and oil storage chamber 102.

[0060] Specifically, such as Figures 2-3 As shown, the oil-gas-water three-phase separation device also includes a baffle 5. The baffle 5 is installed in the separation chamber 101 and faces the inlet. When the oil-gas-water mixture enters the separation chamber 101 from the inlet, the baffle 5 first acts as a buffer. The mixture enters the tank 1 at a certain speed and pressure. The baffle 5 can prevent it from directly impacting other internal structures of the tank 1, reducing impact damage to components such as the agitator 32 and extending the service life of the device. Secondly, the baffle 5 can change the flow direction of the incoming oil-gas-water mixture. After the mixture hits the baffle 5, the baffle 5 guides it to the separation chamber 101. Only when the mixture enters the separation chamber 101 can the subsequent oil-gas-water three-phase separation process be started. The baffle 5 provides a guarantee for the stable operation of the device.

[0061] In this embodiment, the baffle 5 is disposed on the top wall of the sub-layer chamber that is furthest from the oil storage chamber 102.

[0062] Specifically, such as Figures 2-3 As shown, the oil-gas-water three-phase separation device also includes a rectifier 6, which is located at the top of the layered chamber 101 and between the inlet and the outlet. The rectifier 6 can rectify the rising airflow, making the airflow more orderly and able to flow more smoothly to the outlet and be discharged from the outlet.

[0063] In this embodiment, the rectifier 6 is located at the middle position in the horizontal direction of the separation chamber 100. In the separation chamber 100, gas may escape from different sub-layer chambers and oil storage chambers. The rectifier 6 can concentrate these dispersed airflows and make them flow in a more orderly manner, avoiding the formation of chaotic vortices or local accumulation of airflow in the separation chamber 100, thereby improving the stability of the airflow.

[0064] In this embodiment, the rectifier 6 is a honeycomb rectifier, which is composed of numerous honeycomb-shaped units. During the three-phase separation of oil, gas, and water, as gas escapes from different locations, the internal channels of the honeycomb units guide the airflow, causing the gas to flow along a predetermined path. It should be noted that honeycomb rectifiers are a mature technology in this field. Of course, other rectifiers can also be used in this invention.

[0065] Specifically, the oil-gas-water three-phase separation device also includes a suction assembly 7, which includes a mist eliminator 71 and a downflow pipe 72. The mist eliminator 71 is located at the top of the stratification chamber 101 and can cover the exhaust port. The mist eliminator 71 has a water outlet on the side facing the agitator 32, and one end of the downflow pipe 72 is connected to the water outlet. During the oil-gas-water three-phase separation process, although most of the liquid has been separated by stratification, some tiny droplets may still rise with the gas. The mist eliminator 71 can effectively intercept these droplets, ensuring that the gas discharged from the exhaust port is purer. The tiny droplets captured by the mist eliminator 71 will also converge to the water outlet under the action of gravity. The downflow pipe 72 promptly guides the collected liquid back to the stratification chamber 101. The efficient interception of the mist eliminator 71 and the timely return of the downflow pipe 72 work together to further ensure the purity of the exhaust gas and improve the separation effect.

[0066] In this embodiment, the fog eliminator 71 is a folding plate type fog eliminator, which is composed of overlapping serpentine corrugated plates, enclosed by an outer cover, and has a water outlet at the bottom. Gas flows through the tortuous channels between the folding plates, and fog droplets collide with the folding plates due to inertia, then collect at the water outlet and are discharged from the downflow pipe 72. It should be noted that the folding plate type fog eliminator is a mature technology in this field. Of course, other fog eliminators can also be used in this invention.

[0067] In this embodiment, one end of the downflow pipe 72 is connected to the water outlet, and the other end is close to the stirring paddle 322 in the sub-layer chamber adjacent to the oil storage chamber 102. This allows the liquid flowing back from the mist eliminator 71 to directly enter the working area of ​​the stirring paddle 322. The stirring paddle 322 generates a strong shearing force during rotation, which can quickly mix the backflow liquid with other liquids in the sub-layer chamber, causing the liquid to quickly settle to the bottom of the sub-layer chamber. This can prevent the backflow liquid from accumulating above the oil-gas-water mixture, thereby improving the separation efficiency of the three phases of oil, gas, and water.

[0068] Specifically, such as Figures 1-3 As shown, the oil-gas-water three-phase separation device also includes a drain pipe 8, which is connected to the drain outlet. As a pipe connecting to the drain outlet, the drain pipe 8 provides a direct collection path for the water discharged from the bottom of the layered chamber 101. Compared with no dedicated collection pipe, it avoids water dispersion around the device and improves collection efficiency.

[0069] Specifically, the oil-gas-water three-phase separation device also includes an oil drain pipe 9, which is connected to the oil drain port. The oil drain pipe 9 provides a direct collection path for the oil discharged from the bottom of the oil storage chamber 102. The end of the oil drain pipe 9 is connected to an oil storage device. During the oil discharge process, the sealing of the oil drain pipe 9 can prevent external dust, moisture and impurities from mixing into the oil.

[0070] In this embodiment, as Figures 1-3 As shown, the oil-gas-water three-phase separation device also includes an input pipe 10. The input pipe 10 passes through the input port and extends partially into the separation chamber 101. The input pipe 10 provides a direct channel for the oil-gas-water three-phase mixture to enter the separation chamber 101 from the outside. By passing through the input port and extending into the separation chamber 101, it ensures that the mixture can accurately enter the initial separation space and avoids leakage of the mixture near the input port.

[0071] In this embodiment, the oil-gas-water three-phase separation device also includes an exhaust pipe 11. The exhaust pipe 11 passes through the exhaust port and is connected to the mist eliminator 71. The exhaust pipe 11 provides a clear discharge channel for the gas in the separation device, and can guide the gas purified by the mist eliminator 71 to be discharged to the outside in an orderly manner.

[0072] In this embodiment, the oil-gas-water three-phase separation device also includes two supports 12, which are respectively connected to the bottom of both ends of the tank 1 in the length direction, providing stable support for the entire oil-gas-water three-phase separation device, and also facilitating the operation, inspection or maintenance of the bottom of the tank 1 by the staff.

[0073] In other embodiments, the number of supports 12 is not limited to two, and can be reasonably set according to the length of the tank body 1.

[0074] In other embodiments, the support 12 may be omitted, and the oil-gas-water three-phase separator may be fixed by wall mounting or hanging.

[0075] In this embodiment, the three-phase separation process of oil, gas, and water is as follows:

[0076] First, the three-phase mixture of oil, gas and water enters the layered chamber 101 through the input pipe 10;

[0077] Next, after the three-phase mixture of oil, gas and water impacts the baffle 5, the baffle 5 guides it into the first sub-layer chamber. Under the action of gravity and the stirring component 32, the three phases of oil, gas and water begin to separate initially. The water, which has the highest density, gradually sinks to the bottom, while the oil and gas phases, which have lower density, begin to float upward.

[0078] Next, oil, gas and water gradually accumulate in the first sub-layer chamber. When the liquid level rises to a certain level, the oil at the top will first overflow the second overflow baffle 4 and enter the second sub-layer chamber. When the water level in the first sub-layer chamber reaches the top of the second overflow baffle 4, with the continuous injection of the mixed liquid, the oil and water will overflow the second overflow baffle 4 together and enter the second sub-layer chamber. At this time, the oil already in the second sub-layer chamber and the newly entered oil-water mixture will be separated again. The oil and water will overflow in the order of upper and lower layers. The following three sub-layer chambers will repeat the above process in turn. During this process, the oil will gradually accumulate and move towards the oil storage chamber 102, and the water will also gradually move towards the fifth sub-layer chamber. During this process, only the gas is directly separated and discharged from the exhaust pipe 11.

[0079] Finally, the oil overflows the first overflow baffle 2 and enters the oil storage chamber 102, where it is separated before the water and continuously discharged through the oil drain pipe 9. When the water enters the fifth sub-layer chamber and reaches a certain capacity, it is separated and discharged through the drain pipe 8.

[0080] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. An oil-gas-water three-phase separation device, characterized in that, include: Tank (1), wherein a separation chamber (100) is provided inside the tank (1), and the tank (1) is provided with an inlet, an outlet, a drain outlet and an oil outlet; The first overflow baffle (2) is disposed in the separation chamber (100) and divides the separation chamber (100) into a horizontally parallel layered chamber (101) and an oil storage chamber (102). The layered chamber (101) and the oil storage chamber (102) are connected through the space above the first overflow baffle (2). The inlet and the outlet are respectively connected to the layered chamber (101), the drain outlet is connected to the bottom of the layered chamber (101), and the oil outlet is connected to the bottom of the oil storage chamber (102). The stirring assembly (3) includes a drive (31) and a stirring element (32). The stirring element (32) extends into the bottom of the layered chamber (101) and the oil storage chamber (102) and is connected to the output end of the drive (31). The axis of the stirring element (32) is parallel to the axis of the tank body (1). The stirring element (32) can rotate around its own axis under the drive of the drive (31) to scrape the impurities on the inner wall of the layered chamber (101) and the oil storage chamber (102).

2. The oil-gas-water three-phase separation device according to claim 1, characterized in that, The oil-gas-water three-phase separation device also includes a second overflow baffle (4), which is disposed in the layered chamber (101) and divides the layered chamber (101) into multiple sub-layered chambers. The adjacent sub-layered chambers are connected through the space above the second overflow baffle (4). The multiple sub-layered chambers and the oil storage chamber (102) are arranged side by side in the horizontal direction. The inlet is connected to the sub-layered chamber farthest from the oil storage chamber (102). The vertical distance from the top of the second overflow baffle (4) to the bottom wall of the separation chamber (100) is not less than the vertical distance from the top of the first overflow baffle (2) to the bottom wall of the separation chamber (100).

3. The oil-gas-water three-phase separation device according to claim 2, characterized in that, Multiple second overflow baffles (4) are provided, and multiple second overflow baffles (4) are arranged sequentially at intervals along the horizontal direction.

4. The oil-gas-water three-phase separation device according to claim 2, characterized in that, Both the first overflow baffle (2) and the second overflow baffle (4) are vertically arranged.

5. The oil-gas-water three-phase separation device according to claim 1, characterized in that, The stirring component (32) includes a stirring shaft (321) and a plurality of stirring paddles (322). The stirring shaft (321) is connected to the output end of the driving component (31) and extends horizontally from one side of the tank (1) to the opposite side. The plurality of stirring paddles (322) are arranged sequentially at intervals along the stirring shaft (321) in the horizontal direction.

6. The oil-gas-water three-phase separation device according to claim 1, characterized in that, The oil-gas-water three-phase separation device also includes a baffle (5), which is disposed in the layered chamber (101) and faces the inlet.

7. The oil-gas-water three-phase separation device according to claim 1, characterized in that, The oil-gas-water three-phase separation device also includes a rectifier (6), which is located at the top of the layered chamber (101) and between the inlet and the outlet.

8. The oil-gas-water three-phase separation device according to claim 1, characterized in that, The oil-gas-water three-phase separation device also includes an air intake assembly (7), which includes a mist eliminator (71) and a downflow pipe (72). The mist eliminator (71) is located at the top of the layered chamber (101) and can cover the exhaust port. The mist eliminator (71) has a water outlet on the side facing the agitator (32), and the downflow pipe (72) is connected to the water outlet.

9. The oil-gas-water three-phase separation device according to claim 1, characterized in that, The oil-gas-water three-phase separation device also includes a drain pipe (8), which is connected to the drain outlet.

10. The oil-gas-water three-phase separation device according to any one of claims 1-9, characterized in that, The oil-gas-water three-phase separation device also includes an oil drain pipe (9), which is connected to the oil drain port.

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