A petrochemical product oil and gas separator

Abstract

The application discloses a petrochemical product oil-gas separator, a plurality of separation components are arranged in a tank body, the plurality of separation components comprise a first sieve plate, a second sieve plate, an arc plate and a third sieve plate which are arranged at intervals, a plurality of protrusions are arranged on the surfaces of the plurality of sieve plates, a plurality of flow guide openings are arranged on the arc plate, a gas guide pipe is communicated with the tank body, the lower end of the gas guide pipe is located in the tank body between the arc plate and the third sieve plate, a liquid outlet pipe is communicated with the bottom of the tank body, a flow distribution disc is arranged in the tank body above the first sieve plate, the top of the flow distribution disc is conical, a cavity is arranged in the flow distribution disc, a nozzle is arranged at the bottom of the flow distribution disc, a feeding pipe penetrates through the flow distribution disc and is communicated with the cavity so that oil gas to be separated is guided into the cavity and sprayed out through the nozzle, a cyclone device is communicated with the top of the tank body, the cyclone device extends into the tank body and is located above the top end of the flow distribution disc, and the application can overcome the problems of single screening and poor separation effect in the conventional oil-gas separator through twice oil-gas separation.

Description

Technical Field

[0001] The present invention relates to a separator, and more specifically to an oil-gas separator for petrochemical products, belonging to the field of petrochemical industry. Background Art

[0002] In the petrochemical production process, most refining production units (such as catalytic cracking, delayed coking, hydrotreating, hydrocracking, etc.) will produce oil and gas during the production process. For subsequent production and processing, the oil phase and the gas phase need to be separated in order to achieve further cutting of the oil phase and further fine separation of the gas phase.

[0003] Traditional oil-gas separators include an inlet separation device and a mist collector. The inlet separation device is configured as an oil retaining trough or sieve plate. This type of oil-gas separator has low separation efficiency and purity. Even if the gas is separated, it will contain oil droplets, requiring further separation for subsequent use. Moreover, the oil phase itself is often viscous, and the centrifugal filtration in the cyclone device places a heavy load on the device, which can easily cause damage. Furthermore, some oil phases with high viscosity may cause the cyclone device to delay the discharge of liquid, thus affecting oil-gas separation. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide an oil-gas separator for petrochemical products to solve the technical problems existing in the prior art.

[0005] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0006] 18. The oil-gas separator of claim 17, wherein the oil-gas separator has an inner wall that is provided with a plurality of separators, the outer wall of the oil separator having the plurality of separators being connected to the oil filter. The oil filter has a plurality of filter plates, the inner wall of the oil filter having the plurality of filter plates being connected to the oil filter. The oil filter has a plurality of filter plates, the inner wall of the oil filter having the plurality of filter plates being connected to the oil filter.

[0007] Preferably, the swirl device includes a circular cylinder and a conical cylinder connected to the bottom of the circular cylinder, the lower end of the conical cylinder is a small-diameter end, the middle part of the top of the circular cylinder is connected to an air outlet pipe, the side wall of the circular cylinder is connected to an air inlet pipe connected to the tank body, and the air inlet pipe is arranged along the tangential direction of the circular cylinder, a one-way valve is provided at the bottom of the conical cylinder, the one-way valve includes a guide tube connected to the bottom of the conical cylinder, the inner diameter of the guide tube gradually decreases from top to bottom, and a float is provided in the guide tube that can close the bottom of the guide tube.

[0008] Preferably, the air intake pipe includes a driving part and an air intake part connected to the driving part, the driving part is vertically arranged, and the bottom of the driving part is connected to the top of the tank body, the top of the driving part is provided with a pressure relief port, a pressure plate is provided in the driving part which can slide up and down, a spring is provided between the top of the pressure plate and the top of the driving part, the connection point between the driving part and the air intake part is located above the pressure plate, the inner diameter of the air intake part gradually decreases and the inner diameter is the smallest at the connection with the circular cylinder, the top of the air guide pipe is connected to the air intake part, and the air intake part is arranged along the tangent direction of the circular cylinder so that the gas in the air intake part enters along the tangent of the circular cylinder.

[0009] Preferably, an electric heating jacket is sleeved on the tank body, and the electric heating jacket is located in the middle and lower part of the tank body.

[0010] Preferably, a guide plate is fixed around the bottom of the diverter plate, the guide plate is in a flat-topped cone shape, and the small-diameter end of the guide plate is located at the bottom.

[0011] Preferably, the pore size on the first sieve plate is larger than the pore size on the second sieve plate.

[0012] Preferably, the lower end of the first sieve plate is close to the higher end of the second sieve plate.

[0013] Preferably, the diverter plate is connected to the inner wall of the tank body via a connecting rod, and a gap is left between the outer periphery of the diverter plate and the inner wall of the tank body to facilitate the upward flow of the separated gas.

[0014] Preferably, the left end of the first sieve plate is connected to the inside of the tank body, a gap is left between the right end of the first sieve plate and the inner wall of the tank body, a gap is left between the left end of the third sieve plate and the inner wall of the tank body, and the gaps between the first sieve plate and the tank body, and between the third sieve plate and the tank body can facilitate the flow of separated gas.

[0015] Preferably, a valve is provided on the liquid outlet pipe, and a float switch capable of driving the valve to open and close is provided in the tank body below the third sieve plate.

[0016] Beneficial Effects: This invention overcomes the single screening and poor separation performance issues of conventional oil-gas separators by performing two oil-gas separations. Compared to existing centrifugal separation using a cyclone, this invention eliminates the problem of oil stickiness affecting the cyclone's operation. Furthermore, the two-stage separation ensures optimal oil-gas separation. Furthermore, by placing the cyclone at the rear, the separated gas can be processed to remove any oil droplets trapped within it. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a longitudinal cross-sectional view of an embodiment of the present application.

[0018] Figure 2 It is a longitudinal cross-sectional view of the cyclone device in the embodiment of the present application.

[0019] The figure marks in the drawings of the specification include: tank body 1, heating jacket 2, first sieve plate 3, swirl device 4, curved plate 5, guide port 6, air guide pipe 7, spur 8, liquid outlet pipe 9, valve 10, float switch 11, diverter plate 12, cavity 13, nozzle 14, guide plate 15, feed pipe 16, circular cylinder 17, conical cylinder 18, air inlet pipe 19, air outlet pipe 20, guide pipe 21, float 22, drive part 23, air inlet part 24, pressure plate 25. DETAILED DESCRIPTION

[0020] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0021] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "vertical", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0022] In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0023] like Figure 1-2The figure shows an oil-gas separator for petrochemical products of the present invention, comprising a tank body 1, wherein a multi-stage separation assembly is arranged in the tank body 1. From top to bottom, the multi-stage separation assembly comprises a first sieve plate 3, a second sieve plate, an arc-shaped plate 5, and a third sieve plate arranged at intervals. A plurality of thorns 8 are arranged on the surfaces of the plurality of sieve plates. The first sieve plate 3 and the second sieve plate are both arranged to tilt downward, and the inner arc surface of the arc-shaped plate 5 faces upward. A plurality of guide ports 6 are arranged on the arc-shaped plate 5. The tank body 1 is connected to an air guide pipe 7, and the lower end of the air guide pipe 7 is located in the tank body 1 between the arc-shaped plate 5 and the third sieve plate. The tank body 1 is connected to a liquid outlet pipe 9 at the bottom, a diverter disc 12 is provided in the tank body 1 above the first sieve plate 3, the top of the diverter disc 12 is conical, a cavity 13 is provided in the diverter disc 12, and a plurality of nozzles 14 connected to the cavity 13 are provided at the bottom of the diverter disc 12, and a feed pipe 16 is also included. The feed pipe 16 passes through the diverter disc 12 and is connected to the cavity 13 to introduce the oil and gas to be separated into the cavity 13 and spray it out through the nozzle 14. The top of the tank body 1 is connected to a cyclone device 4, which extends into the tank body 1 and is located above the top of the diverter disc 12. The cyclone device 4 includes a circular cylinder 17 and a conical cylinder 18 connected to the bottom of the circular cylinder 17. The lower end of the conical cylinder 18 is a small-diameter end. The middle part of the top of the circular cylinder 17 is connected to an air outlet pipe 20. The side wall of the circular cylinder 17 is connected to an air inlet pipe 19 connected to the tank body 1, and the air inlet pipe 19 is arranged along the tangential direction of the circular cylinder 17. A one-way valve is provided at the bottom of the conical cylinder 18. The one-way valve includes a guide pipe 21 connected to the bottom of the conical cylinder 18. The inner diameter of the guide pipe 21 gradually decreases from top to bottom. A float 22 that can close the bottom of the guide pipe 21 is provided in the guide pipe 21. The air intake pipe 19 includes a driving part 23 and an air intake part 24 connected to the driving part 23. The driving part 23 is vertically arranged, and the bottom of the driving part 23 is connected to the top of the tank body 1. The top of the driving part 23 is provided with a pressure relief port. A pressure plate 25 is provided in the driving part 23 so as to slide up and down. A spring is provided between the top of the pressure plate 25 and the top of the driving part 23. The connection between the driving part 23 and the air intake part 24 is located above the pressure plate 25. The inner diameter of the air intake part 24 gradually decreases and the inner diameter is the smallest at the connection with the circular cylinder 17. The top of the air guide pipe 7 is connected to the air intake part 24. The air intake part 24 is arranged along the tangent direction of the circular cylinder 17 so that the gas in the air intake part 24 enters along the tangent of the circular cylinder 17.

[0024] In a preferred embodiment, the tank body 1 is sleeved with an electric heating jacket 2, which is located in the middle and lower part of the tank body 1. It is used to heat the tank body 1 to facilitate oil and gas separation.

[0025] In a preferred embodiment, the lower end of the first sieve plate 3 is close to the upper end of the second sieve plate, which facilitates flow for secondary separation. The left end of the first sieve plate 3 is connected to the interior of the tank body 1, and a gap is left between the right end of the first sieve plate 3 and the inner wall of the tank body 1. A gap is left between the left end of the third sieve plate and the inner wall of the tank body 1. The gaps between the first sieve plate 3 and the tank body 1, and between the third sieve plate and the tank body 1, facilitate the flow of separated gas.

[0026] In a preferred embodiment, a valve 10 is provided on the liquid outlet pipe 9, and a float switch 11 capable of driving the valve 10 to open and close is provided in the tank body 1 below the third sieve plate. The valve 10 can be an electric valve, or a trigger rod can be connected between the float switch 11 and the valve 10 to realize that the float switch 11 drives the valve 10 to open and close.

[0027] Working principle of this application's technical solution:

[0028] The oil and gas to be separated are introduced into the tank body 1 through the feed pipe 16. The oil phase falls onto multiple sieve plates. The sieve plates block the oil and gas, facilitating the separation of the oil and gas. The gas flows upward, and the mesh and thorns 8 of the sieve plates can break the bubbles in the oil phase, facilitating the escape of the gas. The separated oil phase gathers at the bottom of the tank body 1 and is then discharged through the liquid outlet pipe 9. The gas flows upward and enters the cyclone device 4. The gas flows in a spiral in the cyclone device 4. Since the weight of the oil droplets entrained in the gas is different from that of the gas, the oil and gas are separated under the action of centrifugal force. The separated gas can enter the gas storage tank through the outlet pipe 20 and be discharged. The separated oil liquid is discharged from the bottom of the cyclone device into the tank body 1. The oil and gas separation is achieved, and the separated gas is processed again to separate the oil droplets entrained in the gas, thereby improving the separation effect.

[0029] In another preferred embodiment of the present invention, multiple sieve plates are arranged vertically within the tank body 1, and the apertures of the sieve plates decrease from top to bottom. Specifically, the apertures of the first sieve plate 3 are larger than those of the second sieve plate. Advantageous Effect: The installation of multiple sieve plates can slow the downward flow of oil, resulting in better oil-gas separation.

[0030] In another preferred embodiment of the present invention, the surface of the sieve plate is provided with a plurality of thorns 8. Beneficial effect: the thorns 8 can puncture bubbles in the oil, facilitate the escape of gas, and achieve oil-gas separation.

[0031] Another preferred embodiment of the present invention further includes a diverter plate 12 fixed to a feed pipe 16. A cavity is defined within the diverter plate 12 and communicates with the feed pipe 16. A plurality of nozzles 14 are provided on the diverter plate 12 and communicate with the cavity. Advantageous Effects: The oil and gas are sprayed through the nozzles 14, increasing the contact area between the oil and the outside, thereby facilitating the separation of gas from the oil and improving the oil-gas separation effect.

[0032] In another preferred embodiment of the present invention, the diverter disc 12 is connected to the inner wall of the tank body 1 via a connecting rod, and a gap is left between the outer periphery of the diverter disc 12 and the inner wall of the tank body 1 to facilitate the upward flow of the separated gas. The top of the diverter disc 12 is conical, and a gap is left between the outer periphery of the diverter disc 12 and the inner wall of the tank body. Beneficial effect: The gap between the diverter disc 12 and the tank body 1 facilitates the upward flow of the separated gas. The conical top of the diverter disc allows oil droplets in the gas to automatically drip from the upper portion of the diverter disc and flow easily along the top of the diverter disc to the lower portion of the tank body.

[0033] In another preferred embodiment of the present invention, a guide plate 15 is fixed around the bottom of the diverter plate 12. This guide plate 15 is a flat-topped cone with the smaller end located at the bottom. Advantageous Effects: The installation of guide plate 15 blocks and restricts the injected oil and gas, while also creating a collecting space between it and the inner wall of the tank, facilitating the flow of the separated gas.

[0034] In another preferred embodiment of the present invention, the air inlet pipe 19 includes a drive portion 23 connected to the tank body and an air inlet portion 24 connected to the cyclone device. The air inlet portion 24 is connected to the side wall of the drive portion 23. A pressure plate 25 is vertically slidably connected to the drive portion 23. A spring is provided between the pressure plate 25 and the drive portion 23. The pressure plate 25 can seal the connection between the air inlet portion 24 and the drive portion 23. Beneficial effect: The separated gas gradually accumulates at the upper portion of the diverter plate 12, causing the pressure in the tank body to gradually increase. Therefore, the gas enters through the drive portion 23 and gradually presses the pressure plate 25, causing the pressure plate 25 to move upward. When the pressure plate 25 slides over the connection between the air inlet portion 24 and the drive portion 23, the gas enters the cyclone device 4 through the air inlet portion 24. The gas enters along the tangent line of the cyclone 4 and makes a spiral motion inside the cyclone 4. Under the action of centrifugal force, the oil droplets contained in the gas come into contact with the inner wall of the cyclone, and the gas is located in the inner circle. When the gas moves to the bottom of the cyclone, it flows upward and is discharged through the outlet pipe 20. The separated oil is discharged through the bottom of the cyclone 4.

[0035] In another preferred embodiment of the present invention, the inner diameter of the air inlet 24 gradually decreases as it approaches the cyclone device. Advantageous Effect: The gradually decreasing inner diameter of the air inlet 24 increases the flow rate of the gas, facilitating the spiral motion of the gas after entering the cyclone device, thereby separating the gas from entrained oil droplets.

[0036] In another preferred embodiment of the present invention, an arc-shaped plate 5 is provided below the sieve plate in the tank body 1, and a plurality of flow guide ports 6 are provided on the arc-shaped plate; an air guide pipe 7 is also included, one end of the air guide pipe 7 is connected to the tank body 1 at the lower part of the arc-shaped plate 5, and the other end of the air guide pipe 7 is connected to the air inlet part 24.

[0037] Beneficial effect: The arc-shaped plate 5 divides the lower part of the tank body 1 into two layers. After the oil and gas are separated in the upper part of the arc-shaped plate 5, the oil is diverted to the lower part through the guide port 6. If the gas in the oil is not completely separated at this time, the oil will be separated from the oil and gas again after entering the bottom of the tank body 1. The air guide pipe 7 is connected to the air inlet 24. When the gas in the air inlet 24 flows, according to the Bernoulli principle, it will be sucked in through the air guide pipe 7, and the separated gas will be introduced into the cyclone device 4 for oil and gas separation. It can achieve two oil and gas separations, improve the separation effect, and the separated gas will also be processed by the cyclone device to separate the oil mixed in the gas. In another preferred embodiment of the present invention, a sieve plate is also provided in the tank body 1 below the air guide pipe. Beneficial effect: The oil diverted through the guide port 6 impacts the sieve plate, which can improve the oil and gas separation effect.

[0038] The working process of this application's technical solution:

[0039] The oil and gas to be separated are introduced into the cavity 13 in the diverter plate 12 through the feed pipe 16, and the oil and gas are sprayed into the tank body 1 through the nozzle 14. The sprayed oil and gas agglomerates are small, which facilitates the separation of oil and gas. After the gas and oil are separated. When the agglomerates fall, they will contact the first sieve plate 3 and the second sieve plate. The sieve plate 3 and the thorns 8 break the bubbles, making it easier for the gas to escape and achieve the separation of gas and oil. The separated oil falls onto the curved plate 5 and flows along the curved plate 5. It then enters the bottom of the curved plate 5 through the guide port 6, contacts the third sieve plate at the bottom, and falls to the bottom of the tank body 1. In this process, the second oil and gas separation can be achieved. After the separated oil accumulates to a certain amount at the bottom of the tank body 1, the float head of the float switch 11 will move up, and then the valve 10 will open, and the separated oil will be discharged through the liquid outlet pipe 9. The gas separated above the curved plate 5 flows upward through the gap between the diverter plate 12 and the inner wall of the tank body 1, gradually accumulates at the top of the tank body 1, and then enters the driving portion 23, gradually pushing the pressure upward until the pressure plate 25 slides over the connection between the driving portion 23 and the air inlet 24, and the gas enters the cyclone device 4 through the air inlet 24. Due to the provision of the pressure plate 25 and the spring, the gas needs to overcome a certain pressure to enter the air inlet 24, so the gas has a certain pressure. Combined with the setting of the inner diameter of the air inlet 24, the gas maintains a certain flow rate when entering the circular cylinder 17. The air guide pipe 7 is connected to the air inlet 24. When there is gas flowing in the air inlet 24, according to Bernoulli's principle, the gas separated below the curved plate 5 can be sucked in and then enters the circular cylinder 17.

[0040] The separated gas enters along the tangent of the circular cylinder 17 and spirally rotates inside the circular cylinder 17. Under the action of centrifugal force, the oil droplets contained in the gas move along the inner wall of the circular cylinder 17. The gas is located on the inside. After flowing to the bottom, the oil droplets are discharged through the bottom of the conical cylinder 18. The gas flows upward and is discharged through the outlet pipe 20.

[0041] The separated oil enters the guide tube 21 through the bottom of the conical cylinder 18 and accumulates in the guide tube 21. When it accumulates to a certain amount, the float 22 moves upward under the action of buoyancy, and the oil is discharged through the bottom of the guide tube 21.

[0042] 1. In the present invention, after the oil and gas enter the tank body 1, the first oil and gas separation is performed above the curved plate 5. After the separated oil enters the bottom of the curved plate 5 through the guide port 6, the second oil and gas separation is performed, achieving two oil and gas separations, which can improve the effect of oil and gas separation.

[0043] 2. In the present invention, the gas separated from the oil and gas twice will enter the cyclone device 4. During the spiral motion of the gas, the gas and the entrained oil droplets are separated under the action of centrifugal force, so that the derived gas can be separated and processed, thereby improving the purity of the derived gas.

[0044] 3. In the present invention, the inner diameter of the air inlet portion 24 of the air inlet pipe is set, and the air guide pipe 7 is connected to the air inlet portion 24. According to Bernoulli's principle, when the gas in the air inlet pipe flows, it will be sucked in through the air guide pipe 7, and then the secondary separated gas will be introduced into the cyclone device to separate the gas.

[0045] 4. In this embodiment, thorns 8 are provided on the sieve plate to burst bubbles, facilitate the escape of gas, and facilitate the separation of oil and gas.

[0046] 5. In this embodiment, the oil and gas to be separated are sprayed through the nozzle 14 at the bottom of the diverter plate 12, so that the oil falls in the form of smaller agglomerates, which can facilitate the separation of the gas contained in the oil.

[0047] In summary, the present invention can achieve two oil-gas separations, improving the oil-gas separation effect. At the same time, the separated gas is also separated and processed, which can improve the purity of the separated gas. By performing two oil-gas separations, the present invention can overcome the problems of single screening and poor separation effect in traditional oil-gas separators. Compared with the existing centrifugal separation using a cyclone device, the present invention does not affect the operation of the cyclone device due to oil viscosity. Furthermore, by performing two separations, the oil-gas separation effect can be ensured to be excellent. Furthermore, by placing the cyclone device at the rear, the separated gas can be processed to separate the oil droplets contained in the gas.

[0048] Finally, it should be noted that the present invention is not limited to the above embodiments and may be subject to many variations. All variations that can be directly derived or imagined by a person skilled in the art from the disclosure of the present invention should be considered within the scope of protection of the present invention.

Claims

1. A petrochemical product oil-gas separator, characterized by: The invention comprises a tank body (1), wherein a multi-stage separation assembly is arranged in the tank body (1), and the multi-stage separation assembly comprises a first sieve plate (3), a second sieve plate, an arc plate (5), and a third sieve plate arranged at intervals from top to bottom, and a plurality of thorns (8) are arranged on the surfaces of the plurality of sieve plates, the first sieve plate (3) and the second sieve plate are arranged to be tilted downward, the inner arc surface of the arc plate (5) faces upward, and a plurality of flow guide ports (6) are arranged on the arc plate (5), and the tank body (1) is connected to an air guide pipe (7), and the lower end of the air guide pipe (7) is located in the tank body (1) between the arc plate (5) and the third sieve plate, and the bottom of the tank body (1) is connected to a liquid outlet pipe (9), and the A diverter disc (12) is provided in the tank body (1) above the first sieve plate (3), the top of the diverter disc (12) is conical, a cavity (13) is provided in the diverter disc (12), a plurality of nozzles (14) in communication with the cavity (13) are provided at the bottom of the diverter disc (12), and a feed pipe (16) is also provided. The feed pipe (16) passes through the diverter disc (12) and is in communication with the cavity (13) so as to guide the oil and gas to be separated into the cavity (13) and spray it out through the nozzle (14). The top of the tank body (1) is in communication with a cyclone device (4), which extends into the tank body (1) and is located above the top of the diverter disc (12); The swirl device (4) comprises a circular cylinder (17) and a conical cylinder (18) connected to the bottom of the circular cylinder (17); the lower end of the conical cylinder (18) is a small-diameter end; the middle of the top of the circular cylinder (17) is connected to an air outlet pipe (20); the side wall of the circular cylinder (17) is connected to an air inlet pipe (19) connected to the tank body (1), and the air inlet pipe (19) is arranged along the tangential direction of the circular cylinder (17); a one-way valve is arranged at the bottom of the conical cylinder (18); the one-way valve comprises a guide pipe (21) connected to the bottom of the conical cylinder (18); the inner diameter of the guide pipe (21) gradually decreases from top to bottom; and a floating ball (22) is arranged in the guide pipe (21) to close the bottom of the guide pipe (21); The air inlet pipe (19) comprises a driving part (23) and an air inlet part (24) connected to the driving part (23). The driving part (23) is vertically arranged, and the bottom of the driving part (23) is connected to the top of the tank body (1). The top of the driving part (23) is provided with a pressure relief port. A pressure plate (25) is provided in the driving part (23) so as to slide up and down. A spring is provided between the top of the pressure plate (25) and the top of the driving part (23). The connecting point between the driving part (23) and the air inlet part (24) is located above the pressure plate (25). The inner diameter of the air inlet part (24) gradually decreases and the inner diameter is the smallest at the connection point with the circular cylinder (17). The top of the air guide pipe (7) is connected to the air inlet part (24). The air inlet part (24) is arranged along the tangent direction of the circular cylinder (17) so that the gas in the air inlet part (24) enters along the tangent of the circular cylinder (17).

2. The oil-gas separator for petrochemical products according to claim 1, characterized in that: An electric heating sleeve (2) is sleeved on the tank body (1), and the electric heating sleeve (2) is located in the middle and lower part of the tank body (1).

3. The oil-gas separator for petrochemical products according to claim 1, characterized in that: A guide plate (15) is fixed around the bottom of the diverter plate (12). The guide plate (15) is in a flat-topped cone shape, and the small-diameter end of the guide plate (15) is located at the bottom.

4. The oil-gas separator for petrochemical products according to claim 1, characterized in that: The aperture of the first sieve plate (3) is larger than the aperture of the second sieve plate.

5. The oil-gas separator for petrochemical products according to claim 1, characterized in that: The lower end of the first sieve plate (3) is close to the upper end of the second sieve plate.

6. The oil-gas separator for petrochemical products according to claim 1, 4 or 5, characterized in that: The diverter plate (12) is connected to the inner wall of the tank body (1) via a connecting rod, and a gap is left between the outer periphery of the diverter plate (12) and the inner wall of the tank body (1) to facilitate the upward flow of the separated gas.

7. The oil-gas separator for petrochemical products according to claim 6, characterized in that: The left end of the first sieve plate (3) is connected to the inside of the tank body (1), a gap is left between the right end of the first sieve plate (3) and the inner wall of the tank body (1), a gap is left between the left end of the third sieve plate and the inner wall of the tank body (1), and the gaps between the first sieve plate (3) and the tank body (1), and between the third sieve plate and the tank body (1) can facilitate the flow of separated gas.

8. The oil-gas separator for petrochemical products according to claim 1, characterized in that: The liquid outlet pipe (9) is provided with a valve (10), and a float switch (11) capable of driving the valve (10) to open and close is provided in the tank body (1) below the third sieve plate.

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