Multi-stage oil-gas-water three-phase separation device

Abstract

According to the multistage oil-gas-water three-phase separation device applied to the related technical field of separation, through arrangement of the separation assisting frame, a water layer can be stirred, compared with indifference stirring of liquid in the prior art, the influence on an oil layer is effectively reduced, and meanwhile under the action of the microgap forming pipe, the oil-gas-water separation efficiency is improved. In addition, in a gas exhaust path, on one hand, the oil layer can be horizontally pushed outwards in a reciprocating manner while a water layer is stirred under the action of an oil pushing film, so that the space of the micro-gap is effectively enlarged, and the gas separation efficiency is improved. On the other hand, under the arrangement of the self-closing hole unit, when the water layer is stirred, an oil-free or less-oil gas channel can be formed in the microgap forming pipe, the separation efficiency of the gas and the water layer is further improved, and the influence of the oil layer on gas separation in the water layer is reduced.

Description

Technical Field

[0001] The present invention relates to a multi-stage oil-gas-water three-phase separation device, and in particular to a multi-stage oil-gas-water three-phase separation device applied in the technical field of separation-related. Background Art

[0002] A three-phase separator is a device that separates the oil, gas and water in the formation fluid on the ground and accurately measures their production. The three-phase separator can be divided into three types: vertical, horizontal and spherical. During use, the existing three-phase separator has a poor gas separation effect because the oil covers the surface of the water layer below, which has an isolation effect on the gas in the water layer, making it difficult to stably separate the oil, gas and water three phases. For example, CN101961567B is an oil removal three-phase separator.

[0003] To solve the above problems, the specification of Chinese patent CN118327538A discloses a three-phase separator, which uses a feed pipe to introduce a mixed liquid into a carrying plate, and uses a toggle component to turbulently stir the mixed liquid so that the gas in the mixed liquid can diffuse outward, and the gas can be extracted by using a separation component. After the gas separation is completed, the mixed liquid will all enter the separation box 2. The oil-water separation mechanism in the separation box 2 can be used to further process the mixed liquid to facilitate the separation of the oil and liquid. At the same time, the remaining sewage can be discharged by using a wastewater discharge pipe to complete the three-phase separation work.

[0004] However, in the above patent, in order to break the influence of the oil layer on the gas separation in the water layer below, the entire liquid is first stirred indiscriminately. Although this accelerates the overflow of the gas, it also destroys the stability of the water layer and the oil layer, causing the two to mix. When the water and oil are subsequently separated, it takes a longer time to re-separate the static stratification, which also affects the separation efficiency. Summary of the invention

[0005] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is to accelerate the gas separation by directly stirring the liquid, thereby affecting the subsequent water-oil separation efficiency.

[0006] In order to solve the above problems, the present invention provides a multi-stage oil-gas-water three-phase separation device, including a device body with a controller, an exhaust port and a liquid inlet are fixedly connected to the outer end of the upper part of the device body, an oil discharge port is fixedly connected to the outer end of the middle part of the device body, and a water discharge port is fixedly connected to the lower outer end of the device body. The exhaust port, the oil discharge port and the water discharge port are all fixed and communicated with the device body, a bellows is fixedly connected to the mouth of the oil discharge port facing the inside of the device body, an electric push rod is also fixedly connected to the inner wall of the multi-arm frame, a limited clamp is fixedly connected between the lower end of the electric push rod and the outer end of the mouth of the bellows, and the device body An auxiliary separation frame is provided inside, and an electric push rod is installed between the upper end of the auxiliary separation frame and the top of the device body. The auxiliary separation frame includes a multi-arm frame located at the upper part of the device body, a plurality of connecting pipes fixedly connected to the lower ends of a plurality of extension arms of the multi-arm frame, a plurality of micro-gap tubes respectively fixedly connected to the lower ends of the plurality of connecting pipes, and a plurality of stirring bodies respectively connected to the lower ends of the plurality of micro-gap tubes. The multi-arm frame is fixedly connected to the extended end of the electric push rod, the upper ends of the plurality of micro-gap tubes are located in the middle part of the device body, the lower ends of the micro-gap tubes are located in the lower part of the device body, and the lower ends of the plurality of stirring bodies are not in contact with the inner bottom of the device body. The micro-gap tube includes two air guide sections and a tube body section fixedly connected between the two air guide sections. The stirring body includes a top plate connected to the lower air guide section through an electric rotating shaft and two stirring needles fixedly connected to the lower end of the top plate. The outer end of the tube body section is fixedly connected to an embedded groove, and the inner bottom end of the embedded groove is fixedly connected to an infrared spectrophotometer for oil measurement.

[0007] In the above-mentioned multi-stage oil-gas-water three-phase separation device, the water layer can be stirred by setting up the auxiliary separation frame, which effectively reduces the impact on the oil layer compared with the indiscriminate stirring of the liquid in the prior art. At the same time, under the action of the micro-gap tube, a micro-gap can be formed between the oil layer and the micro-gap tube, providing a channel for gas overflow, thereby effectively reducing the impact of the oil layer on the gas separation in the water layer below, thereby effectively improving the separation efficiency.

[0008] As a further improvement of the present application, the lower air guide section is lower than the water layer, the upper air guide section is higher than the liquid surface of the liquid to be separated, and the surfaces of the microgap tube and the stirring body are coated with a hydrophobic and oleophobic coating.

[0009] As a further improvement of the present application, one stirring needle is in the shape of a vertical rod, and the other stirring needle is in the shape of a broken line, and the outer surfaces of the two stirring needles are polished.

[0010] As a further improvement of the present application, the outer surface of the tube body section is also covered with an oil push film, and the oil push film does not overlap with the embedded groove, the outer end of the connecting tube is fixedly connected to an air guide pipe, the lower end of the air guide pipe is fixedly passed through the tube body section and faces the oil push film, and the middle part of the upper end of the multi-arm frame is fixedly connected to an air intake pipe, which extends outside the device body.

[0011] As a further improvement of the present application, the multi-arm frame is a hollow structure, and the air intake pipe, the multi-arm frame, the connecting pipe and the air guide pipe are connected in sequence, the oil push film is made of elastic sealing material, and the outer surface of the oil push film is also coated with a hydrophobic and oleophobic coating.

[0012] As another improvement of the present application, exhaust holes are drilled at the outer ends of the two air guide segments, and the two air guide segments are communicated with the interior of the tube body segment. A protective isolation unit is arranged on the outer side of the lower air guide segment, and the protective isolation unit includes an outer sleeve mounted outside the air guide segment and a self-closing hole unit for controlling the reciprocating rotation of the outer sleeve. An air guide hole is drilled at the outer end of the outer sleeve, and the mouth size of the air guide hole is larger than the mouth size of the exhaust hole.

[0013] As another improved supplement of the present application, the self-closing hole unit includes a supporting plate fixedly connected to the upper end of the top plate and a changing plate fixedly connected to the outer end of the outer sleeve, one end of the supporting plate is fixedly connected to a rubber pad, and the other end of the supporting plate is fixedly embedded with an electromagnetic plate, when the electromagnetic plate is energized, there is a magnetic attraction between the electromagnetic plate and the end face of the changing plate away from the air guide hole, the upper end of the top plate and the lower end of the outer sleeve are fixedly embedded with mutually matching magnetic sheets, and the ends of the two magnetic sheets that are close to each other are adsorbed to each other.

[0014] As another improved supplement of the present application, the bearing plate does not contact the surface of the outer sleeve, and the top of the bearing plate is lower than the air guide hole, the inner wall of the outer sleeve and the outer wall of the air guide section are in contact with each other, and the heights of the two are the same.

[0015] In summary, by setting up the auxiliary separation frame, the water layer can be stirred, which effectively reduces the impact on the oil layer compared to the indiscriminate stirring of the liquid in the prior art. At the same time, under the action of the micro-gap tube, a micro-gap can be formed between the oil layer and the micro-gap tube, providing a channel for gas overflow, thereby effectively reducing the impact of the oil layer on gas separation. In addition, in the gas discharge path, on the one hand, with the effect of the oil-pushing film, while stirring the water layer, the oil layer can also be pushed back and forth horizontally outward, thereby effectively increasing the space of the micro-gap and accelerating gas separation. On the other hand, under the setting of the self-combining pore unit, when stirring the water layer, an oil-free or low-oil gas channel can be formed in the micro-gap tube, which further accelerates the separation efficiency of the gas and water layer and reduces the impact of the oil layer on the gas separation in the water layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a three-dimensional diagram of a device according to a first embodiment of the present application; Figure 2 It is a partial front cross-sectional view of the device of the first embodiment of the present application when the oil push film and related structures are removed; Figure 3 This is a three-dimensional diagram of the separation aid frame of the first embodiment of the present application; Figure 4A three-dimensional diagram of a micro-gap tube portion according to a first embodiment of the present application; Figure 5 This is a radial cross-sectional view of a microgap tube according to a first embodiment of the present application; Figure 6 This is a cross-sectional view of a portion of the microgap tube of the first embodiment of the present application when in use; Figure 7 This is a schematic diagram of forming a micro gap according to the first embodiment of the present application; Figure 8 A partial front cross-sectional view of the device of the first embodiment of the present application when the oil film and related structures are pushed upward; Fig. 9 This is a schematic diagram of the micro-gap tube of the first embodiment of the present application when the micro-gap is enlarged; Fig.10 It is a top view schematic diagram of the self-closing hole unit part when the exhaust hole and the air guide hole are misaligned in the second embodiment of the present application; Fig.11 A three-dimensional diagram of a self-closing hole unit portion when the exhaust hole and the air guide hole are misaligned in the second embodiment of the present application; Fig.12 A top view of a self-joining hole unit portion when the exhaust hole and the air guide hole overlap in the second embodiment of the present application; Fig.13 This is a three-dimensional diagram of the self-closing hole unit part when the exhaust hole and the air guide hole overlap in the second embodiment of the present application.

[0017] Description of the numbers in the figure: 1 device body, 101 exhaust port, 102 oil discharge port, 103 water outlet, 104 lower electric push rod, 105 bellows, 106 limit fixture, 2 multi-arm frame, 201 upper electric push rod, 3 connecting pipe, 301 air guide pipe, 302 air intake pipe, 4 micro-gap pipe, 41 pipe body section, 42 air guide section, 43 oil push film, 401 exhaust hole, 402 infrared spectrophotometer, 403 embedded groove, 5 stirring body, 51 top plate, 52 stirring needle, 6 outer sleeve, 601 air guide hole, 602 magnetic sheet, 61 bearing plate, 62 direction changing plate. DETAILED DESCRIPTION

[0018] Two implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0019] The first implementation method: Figure 1-2A multi-stage oil-gas-water three-phase separation device is shown, comprising a device body 1 with a controller, an exhaust port 101 and a liquid inlet are fixedly connected to the upper outer end of the device body 1, an oil discharge port 102 is fixedly connected to the middle outer end of the device body 1, and a water discharge port 103 is fixedly connected to the lower outer end of the device body 1. The exhaust port 101, the oil discharge port 102 and the water discharge port 103 are all fixed to and communicated with the device body 1, and the oil discharge port 102 is fixedly connected to the opening of the device body 1. A bellows 105 is fixedly connected to the inner wall of the multi-arm frame 2. An electric push rod 104 is connected, and a limiting clamp 106 is fixedly connected between the lower end of the electric push rod 104 and the outer end of the mouth of the bellows 105. When the water layer and the oil layer are separated after stratification, the electric push rod 104 can control the bellows 105 to extend or shorten, so that the mouth of the bellows 105 can adapt to the changes in the liquid level of the oil layer after the water in the water layer is discharged along the drain port 103, so that the mouth of the bellows 105 can always extend into the oil layer, so that the separation of the water layer and the oil layer can be carried out synchronously, thereby accelerating the separation efficiency of the device.

[0020] like Figure 2-3 An auxiliary separation frame is provided inside the device body 1, and an upper electric push rod 201 is installed between the upper end of the auxiliary separation frame and the top of the device body 1. The auxiliary separation frame includes a multi-arm frame 2 located at the upper part of the device body 1, a plurality of connecting tubes 3 fixedly connected to the lower ends of a plurality of extension arms of the multi-arm frame 2, a plurality of micro-gap tubes 4 respectively fixedly connected to the lower ends of the plurality of connecting tubes 3, and a plurality of stirring bodies 5 respectively connected to the lower ends of the plurality of micro-gap tubes 4. The multi-arm frame 2 is fixedly connected to the extended end of the upper electric push rod 201, the upper ends of the plurality of micro-gap tubes 4 are located in the middle part of the device body 1, the lower ends of the plurality of micro-gap tubes 4 are located in the lower part of the device body 1, and the lower ends of the plurality of stirring bodies 5 are not in contact with the bottom of the device body 1; like Figure 4-5 The microgap tube 4 includes two air guide sections 42 and a tube section 41 fixedly connected between the two air guide sections 42. The stirring body 5 includes a top plate 51 connected to the lower air guide section 42 through an electric rotating shaft and two stirring needles 52 fixedly connected to the lower end of the top plate 51. One stirring needle 52 is in the shape of a vertical rod, and the other stirring needle 52 is in the shape of a broken line. The outer surfaces of the two stirring needles 52 are polished, so that when the stirring body 5 rotates to stir the water layer, the stirring amplitude is not easy to be too large, which effectively reduces the excessive fluctuation of the oil layer caused by the excessive vibration amplitude of the water layer.

[0021] The outer end of the tube body section 41 is fixedly connected with an embedded groove 403, and the inner bottom end of the embedded groove 403 is fixedly connected with an infrared spectrophotometer 402. Through the setting of the embedded groove 403, the position of the dividing line between the water layer and the oil layer can be effectively distinguished, which is convenient for the controller to control the electric push rod 104 to extend or shorten appropriately, thereby ensuring that the mouth of the bellows 105 is not easy to separate from the oil layer or extend into the water layer, so that the continuity and stability of the subsequent water-oil separation are better.

[0022] like Figure 6 In the figure, a represents the water layer, and b represents the oil layer. After the water and oil are separated, when the water and oil separation boundary is determined under the action of the infrared spectrophotometer 402, the position of the entire auxiliary separation frame can be adjusted by the upper electric push rod 201, so that the lower air guide section 42 is lower than the water layer, and the upper air guide section 42 is higher than the liquid surface of the liquid to be separated. Then, the electric turntable is used to control the rotation of the stirring body 5 to achieve targeted stirring of the water layer and accelerate the overflow of the gas. At the same time, since the two air guide sections 42 are not in the oil layer, it is effectively guaranteed that the oil layer can be completely penetrated by the tube body section. The surfaces of the micro-gap tube 4 and the stirring body 5 are coated with a hydrophobic and oleophobic coating, making it difficult for oil and water to adhere to the surfaces of the two. Figure 7 For the micro-gap tube 4 that spans the entire oil layer, it is difficult for the oil layer to be in close contact with the surface of the micro-gap tube 4. When the gas overflows, under the action of the gas, certain micro-gaps can be generated on the surface of the micro-gap tube 4, which can serve as an overflow channel for part of the gas, making it easier for the gas to overflow across the oil layer. Compared with the existing technology, it effectively reduces the obstacle to the overflow of gas in the water layer due to the coverage of the oil layer.

[0023] like Figure 8-9 The outer surface of the tube body section 41 is also covered with an oil pushing film 43, and the oil pushing film 43 does not overlap with the embedded groove 403. The outer end of the connecting pipe 3 is fixedly connected to the air guide pipe 301, and the lower end of the air guide pipe 301 is fixedly connected to the tube body section 41 and faces the oil pushing film 43. The middle part of the upper end of the multi-arm frame 2 is fixedly connected to the air inlet pipe 302, and the air inlet pipe 302 extends to the outside of the device body 1. The multi-arm frame 2 is a hollow structure, and the air inlet pipe 302, the multi-arm frame 2, the connecting pipe 3 and the air guide pipe 301 are connected in sequence. The oil pushing film 43 is made of elastic sealing material, and the outer surface of the oil pushing film 43 is also coated with a hydrophobic and oleophobic coating. When in use, the air inlet pipe 302 can be connected to an external air pump. When the stirring body 5 is started to rotate, the water layer can be stirred in a targeted manner. First, the micro-gap tube 4 is inflated with air through an air pump, and the gas enters the tube body section 41 and the oil pushing film 43 along the connecting tube 3, thereby causing the oil pushing film 43 to expand rapidly, so that the oil layer is pushed outward along the surface of the micro-gap tube 4, and then the air is quickly pumped out to restore the deformation of the oil pushing film 43. It is worth noting that the pumping speed is controlled to be greater than the air intake speed, so that the oil layer pushed away by inertia has no time to return to the tube body section 41 synchronously with the oil pushing film 43, thereby causing a certain period of non-contact between the micro-gap tube 4 and the oil layer, making the micro-gap larger. During use, the above-mentioned inflation and pumping processes are repeated continuously, thereby causing the micro-gap on the oil layer to intermittently increase, further reducing the influence of the oil layer covering the water layer on gas separation.

[0024] It is worth noting that, according to the prior art, the volume of the oil-gas-water three-phase separation device itself is very large. In order to avoid mutual influence between two adjacent micro-gap tubes 4 and to ensure the density of the micro-gap to facilitate gas overflow, the distance between two adjacent micro-gap tubes 4 is not less than 30 cm.

[0025] In summary, by setting up the auxiliary separation frame, the water layer can be stirred, which effectively reduces the impact on the oil layer compared to the indiscriminate stirring of the liquid in the prior art. At the same time, under the action of the micro-gap tube 4, a micro-gap can be formed between the oil layer and the micro-gap tube 4, providing a channel for gas overflow, thereby effectively reducing the impact of the oil layer on the gas separation in the water layer below, thereby effectively improving the separation efficiency. In addition, in the gas discharge path, on the one hand, with the action of the oil pushing film 43, while stirring the water layer, it can also push the oil layer horizontally outward, thereby effectively increasing the space of the micro-gap and accelerating the gas separation.

[0026] The second implementation method: This embodiment adds a protection isolation unit on the basis of the first embodiment, and the rest of the parts are consistent with the first embodiment.

[0027] Fig.10 As shown, the outer ends of the two air guide sections 42 are both bored with exhaust holes 401, and the two air guide sections 42 are both communicated with the interior of the tube section 41. A protective isolation unit is arranged on the outer side of the lower air guide section 42, and the protective isolation unit includes an outer sleeve 6 sleeved on the outer side of the air guide section 42 and a self-closing hole unit for controlling the reciprocating rotation of the outer sleeve 6. The outer end of the outer sleeve 6 is bored with an air guide hole 601, as shown in FIG. Fig.12 The mouth size of the air guide hole 601 is larger than the mouth size of the exhaust hole 401, so that when the two overlap, the air guide hole 601 is not easy to block the exhaust hole 401, which facilitates the separated gas to enter the micro-gap tube 4, effectively ensuring that part of the gas generated by the water layer below can bypass the oil layer, so that it can enter the tube body section 41 along the lower exhaust hole 401, and finally overflow from the upper exhaust hole 401, and finally be discharged through the exhaust port 101, thereby providing an oil-free or less oil-rich channel for the overflow of the gas, further accelerating the separation efficiency of the gas and the water layer, and reducing the influence of the oil layer on the separation of the gas in the water layer.

[0028] like Figure 11-12 The self-closing hole unit includes a bearing plate 61 fixedly connected to the upper end of the top plate 51 and a direction-changing plate 62 fixedly connected to the outer end of the outer sleeve 6. The direction-changing plate 62 is made of a ferromagnetic metal material. A rubber pad is fixedly connected to one end of the bearing plate 61. An electromagnetic plate is fixedly embedded inside the other end of the bearing plate 61. When the electromagnetic plate is energized, there is a magnetic attraction between the end surface of the direction-changing plate 62 away from the air guide hole 601. The upper end of the top plate 51 and the lower end of the outer sleeve 6 are fixedly embedded with mutually matching magnetic sheets 602. The ends of the two magnetic sheets 602 that are close to each other are adsorbed to each other. Fig.10 When not stirring, the electromagnetic plate is in a powered state and can adsorb the direction-changing plate 62, so that the outer sleeve 6 is bound. At this time, the exhaust hole 401 and the air guide hole 601 are misaligned, which can prevent the external water from entering the micro-gap tube 4. Figure 12-13 In the figure, the dark solid arrow indicates the rotation direction of the top plate 51, and the light dotted arrow indicates the gas flow direction. When the water and oil are separated, the electromagnetic plate is powered off, and then the stirring body 5 is controlled to rotate. When the magnetic piece 602 on the stirring body 5 coincides with the magnetic piece 602 under the outer sleeve 6, the outer sleeve 6 is temporarily bound to the top plate 51, so that it rotates synchronously with the stirring body 5, and then gradually approaches the side of the supporting plate 61 with the rubber pad. When the two collide with each other, the exhaust hole 401 and the air guide hole 601 gradually coincide, so that the micro-gap tube 4 is connected inside and outside. At this time, part of the water and gas enter the micro-gap tube 4 The outer sleeve 6 is separated from the stirring body 5, so that the outer sleeve 6 is not easy to affect the continuous rotation of the stirring body 5. When the stirring body 5 rotates to make the magnetic piece 602 contact with the magnetic piece 602 on the outer sleeve 6 again, the outer sleeve 6 is driven to repeat the above process again, so that when the stirring body 5 is stirring the water layer, the micro-gap tube 4 is always in a state of continuous exhaust, which can further reduce the influence of the oil layer on the gas separation.

[0029] The bearing plate 61 does not contact the surface of the outer sleeve 6, and the top of the bearing plate 61 is lower than the air guide hole 601, so that the bearing plate 61 will not block the air guide hole 601. When the air guide hole 601 and the exhaust hole 401 overlap, the gas can stably enter the micro-gap tube 4 and be discharged along the upper exhaust hole 401, and finally be discharged from the exhaust port 101. The inner wall of the outer sleeve 6 and the outer wall of the air guide section 42 are in contact with each other, and the heights of the two are the same, which effectively ensures the concentricity of the outer sleeve 6 and the air guide section 42, so that when the outer sleeve 6 rotates, it is not easy to shake back and forth, so that when the top plate 51 rotates one circle, the magnetic sheet 602 on its surface will always It can overlap and contact with the air guide hole 601 under the outer sleeve 6. When the stirring of the water layer is completed, the top plate 51 can be controlled to rotate in the opposite direction, so that after the two magnetic sheets 602 overlap, the outer sleeve 6 can be driven to rotate in the opposite direction toward the electromagnetic plate. At this time, the electromagnetic plate is controlled to be energized, and then the direction-changing plate 62 can be adsorbed, thereby limiting the position of the outer sleeve 6, making it difficult for external liquid to enter the micro-gap tube 4, and effectively avoiding the situation where the external oil layer enters the micro-gap tube 4. When the device is used multiple times, the gas channel formed inside the micro-gap tube 4 does not contain oil or contains only a small amount of oil, and it is difficult to form an oil layer inside it, which is convenient for gas separation.

[0030] It is worth noting that the opening angles of the air guide hole 601 and the exhaust hole 401 are no greater than 120°, which effectively ensures that the two can be completely misaligned.

[0031] In summary, under the setting of the self-combining pore unit, compared with the first embodiment, when the water layer is stirred, an oil-free or oil-less gas channel can be formed in the microgap tube 4, which further accelerates the separation efficiency of the gas and water layer and reduces the influence of the oil layer on the gas separation in the water layer.

[0032] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A multi-stage oil, gas and water three-phase separation device, characterized in that: The invention comprises a device body (1) with a controller, wherein the upper outer end of the device body (1) is fixedly connected with an exhaust port (101) and a liquid inlet, the middle outer end of the device body (1) is fixedly connected with an oil discharge port (102), and the lower outer end of the device body (1) is fixedly connected with a water discharge port (103), the exhaust port (101), the oil discharge port (102) and the water discharge port (103) are all fixed to and communicate with the device body (1), the oil discharge port (102) is fixedly connected with a bellows (105) at the mouth of the device body (1), the inner wall of the multi-arm frame (2) is also fixedly connected with a lower electric push rod (104), a limiting clamp (106) is fixedly connected between the lower end of the lower electric push rod (104) and the outer end of the mouth of the bellows (105), and the device body (1) is provided with an auxiliary separation frame inside, an upper electric push rod (201) is installed between the upper end of the auxiliary separation frame and the top of the device body (1), the auxiliary separation frame comprises a multi-arm frame (2) located at the upper part of the device body (1), a plurality of connecting pipes (3) fixedly connected to the lower ends of a plurality of extension arms of the multi-arm frame (2), a plurality of micro-gap forming pipes (4) respectively fixedly connected to the lower ends of the plurality of connecting pipes (3), and a plurality of stirring bodies (5) respectively connected to the lower ends of the plurality of micro-gap forming pipes (4), the multi-arm frame (2) is fixedly connected to the extended end of the upper electric push rod (201), the upper ends of the plurality of micro-gap forming pipes (4) are located in the middle part of the device body (1), the lower ends of the micro-gap forming pipes (4) are located in the lower part of the device body (1), and the lower ends of the plurality of stirring bodies (5) are not in contact with the bottom of the device body (1); The micro-gap forming tube (4) comprises two air guide sections (42) and a tube section (41) fixedly connected between the two air guide sections (42); the stirring body (5) comprises a top plate (51) connected to the lower air guide section (42) via an electric rotating shaft and two stirring needles (52) fixedly connected to the lower end of the top plate (51); an inner groove (403) is fixedly connected to the outer end of the tube section (41); and an infrared spectrophotometer (402) is fixedly connected to the inner bottom end of the inner groove (403).

2. A multi-stage oil-gas-water three-phase separation device according to claim 1, characterized in that: The lower air guide section (42) is lower than the water layer, and the upper air guide section (42) is higher than the liquid surface of the liquid to be separated. The surfaces of the micro-gap forming tube (4) and the stirring body (5) are coated with a hydrophobic and oleophobic coating.

3. The multi-stage oil-gas-water three-phase separation device according to claim 1, characterized in that: One of the stirring needles (52) is in the shape of a vertical rod, and the other stirring needle (52) is in the shape of a broken line, and the outer surfaces of the two stirring needles (52) are polished.

4. The multi-stage oil-gas-water three-phase separation device according to claim 2, characterized in that: The outer surface of the tube body section (41) is also coated with an oil pushing film (43), and the oil pushing film (43) does not overlap with the embedded groove (403); the outer end of the connecting tube (3) is fixedly connected to an air guide pipe (301); the lower end of the air guide pipe (301) is fixedly passed through the tube body section (41) and faces the oil pushing film (43); the middle part of the upper end of the multi-arm frame (2) is fixedly connected to an air intake pipe (302), and the air intake pipe (302) extends to the outside of the device body (1).

5. The multi-stage oil-gas-water three-phase separation device according to claim 4, characterized in that: The multi-arm frame (2) is a hollow structure, and the air intake pipe (302), the multi-arm frame (2), the connecting pipe (3) and the air guide pipe (301) are sequentially connected, the oil push film (43) is made of an elastic sealing material, and the outer surface of the oil push film (43) is also coated with a hydrophobic and oleophobic coating.

6. The multi-stage oil-gas-water three-phase separation device according to claim 1, characterized in that: The outer ends of the two air guide sections (42) are both provided with exhaust holes (401), and the two air guide sections (42) are both communicated with the interior of the tube section (41). A protective isolation unit is provided on the outer side of the lower air guide section (42), and the protective isolation unit comprises an outer sleeve (6) sleeved on the outside of the air guide section (42) and a self-closing hole unit for controlling the reciprocating rotation of the outer sleeve (6). The outer end of the outer sleeve (6) is provided with an air guide hole (601), and the size of the mouth of the air guide hole (601) is larger than the size of the mouth of the exhaust hole (401).

7. The multi-stage oil-gas-water three-phase separation device according to claim 6, characterized in that: The self-closing hole unit comprises a bearing plate (61) fixedly connected to the upper end of the top plate (51) and a direction-changing plate (62) fixedly connected to the outer end of the outer sleeve (6); one end of the bearing plate (61) is fixedly connected to a rubber pad; the other end of the bearing plate (61) is fixedly embedded with an electromagnetic plate; when the electromagnetic plate is energized, a magnetic attraction force exists between the electromagnetic plate and the end surface of the direction-changing plate (62) away from the air guide hole (601); the upper end of the top plate (51) and the lower end of the outer sleeve (6) are fixedly embedded with magnetic sheets (602) that match each other; the ends of the two magnetic sheets (602) that are close to each other are attracted to each other.

8. The multi-stage oil-gas-water three-phase separation device according to claim 7, characterized in that: The bearing plate (61) does not contact the surface of the outer sleeve (6), and the top of the bearing plate (61) is lower than the air guide hole (601). The inner wall of the outer sleeve (6) and the outer wall of the air guide section (42) are in contact with each other, and the two are at the same height.

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