Hydrodynamic cavitation demulsification and cyclone separation device for emulsified oil wastewater

Abstract

The application is an emulsified oil wastewater hydraulic cavitation demulsification and cyclone separation device, which comprises a fixed cylinder, a dispersion cavity, a cavitation cavity, a separation cavity and a light phase fluid cavity which are sequentially communicated in the inner cavity of the fixed cylinder; the separation cavity is provided with a heavy phase fluid outlet, and the light phase fluid cavity is provided with a light phase fluid outlet; the dispersion cavity is provided with an additive inlet for adding a demulsifier; the dispersion cavity is provided with a liquid inlet, and the emulsified oil wastewater flows into the dispersion cavity from the liquid inlet; the dispersion cavity is used for dispersing oil-in-water emulsion, mixing the emulsified oil wastewater and the demulsifier, and forming a cyclone of the liquid in the dispersion cavity to flow to the cavitation cavity; the cavitation cavity is used for cavitation of the fluid and cracking of the emulsified oil wastewater; under the action of the cyclone, the heavy phase water in the fluid flowing into the separation cavity migrates to the inner wall of the fixed cylinder and rotates to flow out from the heavy phase fluid outlet, and the light phase oil enters the light phase fluid cavity and flows out from the light phase fluid outlet. The application has short treatment time, high treatment efficiency, simple structure and low operation and maintenance cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of emulsified oil wastewater separation, in particular to an emulsified oil wastewater hydrodynamic cavitation demulsification and cyclone separation device. BACKGROUND

[0002] In the process of oilfield development, a large amount of water is often extracted from the ground. Under the action of pressure, temperature change and mechanical stirring in the process of exploitation, crude oil and water are easy to form stable emulsions. These emulsions contain a large amount of emulsified oil, which is the main source of emulsified oil wastewater. In order to improve oil recovery, enhanced recovery techniques such as water injection are often used, and the injected water mixes with the crude oil, further increasing the probability of emulsified oil wastewater. Emulsified oil wastewater has great harm in oil exploitation. It not only reduces the quality of crude oil, increases the difficulty and cost of subsequent processing, but also causes serious pollution to the environment such as soil and water if it is directly discharged without effective treatment, and destroys the ecological balance.

[0003] Therefore, Chinese patent CN105948169A discloses a petroleum oil-water separation equipment, wherein the petroleum oil-water to be treated is pumped by an oil pump, the upper oil in the separation bin is pumped to an oil storage tank, the water in the separation bin is pumped to a water storage tank by a water pump, and preliminary oil-water separation is realized. However, the separation equipment needs to be stationary in the separation bin when separating oil and water, which greatly prolongs the separation time and reduces the processing capacity.

[0004] Chinese patent CN218046482U discloses a petroleum chemical oil-water separation device, which rotates the stirring part composed of a shaft and stirring blades by the work of a stirring motor, and further filters the filtered petroleum through the filter screen plate embedded on the stirring blades to improve the impurity removal efficiency and oil-water separation quality. However, the filter screen plate of the device is prone to clogging, which reduces the processing efficiency.

[0005] Chinese patent CN112239255A discloses a device for removing oil from industrial emulsified oil wastewater, the power mechanism of the invention can put an appropriate amount of demulsifier according to the amount of emulsified oil wastewater, reduce the waste of demulsifier, and precipitate the residual microparticle oil beads in the emulsified oil wastewater to the bottom of the wastewater, realizing oil-water separation. However, the process flow of the device is complex, and the operation and maintenance cost is high.

[0006] In summary, the existing emulsified oil wastewater separation technology has the following problems: 1. The time for separating oil and water is long, and the processing capacity is low; 2. The filter screen plate is prone to clogging, which reduces the processing efficiency; 3. The process flow is complex, and the operation and maintenance cost is high. SUMMARY

[0007] To solve the technical problems in the background art, the present application discloses an emulsified oil wastewater hydrodynamic cavitation demulsification and cyclone separation device.

[0008] The application provides an emulsified oil wastewater hydraulic cavitation demulsification and cyclone separation device.

[0009] The separation chamber is provided with a heavy phase fluid outlet, and the light phase fluid chamber is provided with a light phase fluid outlet.

[0010] The dispersion chamber is provided with an additive inlet for adding a demulsifier.

[0011] The dispersion chamber is provided with a liquid inlet, and the emulsified oil wastewater flows into the dispersion chamber from the liquid inlet.

[0012] The dispersion chamber is also provided with a rotating drum coaxially arranged with the fixed cylinder, the rotating drum is driven to rotate by a motor, the outer side wall of the rotating drum is provided with spiral guide vanes, the rotating drum is used for dispersing oil-in-water emulsion, mixing the emulsified oil wastewater and the demulsifier, and forming a cyclone of the liquid in the dispersion chamber and flowing to the cavitation chamber.

[0013] The rotating drum extends to the cavitation chamber, and the part of the rotating drum located in the cavitation chamber is provided with a driving rod extending radially outward; the cavitation chamber and the separation chamber are connected through a circular cavitation hole, and the cavitation hole is in gap cooperation with the driving rod, so that when the rotating drum rotates, the liquid is cavitated and the emulsified oil wastewater is broken.

[0014] The fluid entering the separation chamber is subjected to the action of the cyclone, the heavy phase water migrates to the inner wall of the fixed cylinder and rotates to flow out of the heavy phase fluid outlet, and the light phase oil enters the light phase fluid chamber and flows out of the light phase fluid outlet.

[0015] The beneficial effects of the above arrangement are as follows: 1. Under the combined action of the rotation of the guide vanes and the addition of the demulsifier through the additive inlet, the oil-in-water emulsion can be dispersed to realize oil-water separation; 2. The rotating drum drives the driving rod to rotate, and the shear fluid produces cavitation effect under the action of the communication hole, which increases the contact area of the impact wave and microjet produced by the collapse of cavitation bubbles with small particle emulsion, fully breaks the oil-in-water emulsion, and realizes the separation of oil and water; 3. The cavitation hole not only provides a channel for the fluid to flow to the separation chamber, but also forms a Venturi tube for the fluid channel, which produces a Venturi tube type hydraulic cavitation effect, realizes re-cavitation, further enhances the cavitation effect, and fully realizes the separation of oil and water; 4. The liquid entering the separation chamber is subjected to the action of cyclone centrifugation, the heavy phase water with large density flows to the inner wall of the fixed cylinder and rotates along the wall to flow out of the heavy phase liquid outlet; the light phase oil with small density flows out of the light phase liquid outlet, thereby realizing oil-water separation. Compared with the prior art, the application has the advantages of short processing time, high processing efficiency, no blocking phenomenon, simple structure, simple process flow, and low operation and maintenance cost.

[0016] Further, the dispersion cavity is radially connected with a volute-shaped input pipe, the inner side of the input pipe is attached to the fixed cylinder, the outlet end of the input pipe is communicated with the dispersion cavity, and the inlet end is the liquid inlet; the flow direction of the emulsified oil wastewater at the outlet end of the input pipe is consistent with the rotation direction of the rotating cylinder. In this way, the flow rate of the emulsified oil wastewater entering the dispersion cavity can be increased, and the separation efficiency can be improved.

[0017] The specific structure of the light phase fluid cavity is that the fixed cylinder is provided with a bottom plate at one end close to the motor, and a partition plate arranged in the fixed cylinder and spaced from the bottom plate; the partition plate is connected with the rotating cylinder through a sealing ring; the bottom plate, the partition plate, the inner wall of the fixed cylinder and the outer wall of the rotating cylinder form the light phase fluid cavity; the part of the rotating cylinder located in the light phase fluid cavity is provided with a communication hole communicating the light phase fluid cavity and the inner cavity of the rotating cylinder.

[0018] The specific structure of the cavitation cavity is that a cavitation cylinder is coaxially arranged in the fixed cylinder; the communication hole is arranged on the cavitation cylinder; one end of the cavitation cylinder is connected with a fixed plate protruding outward, and the outer side surface of the fixed plate is fixedly connected with the inner side surface of the fixed cylinder; the other end of the cavitation cylinder is connected with a baffle protruding inward, and the baffle is gap-fitted with the rotating cylinder; the inner wall of the cavitation cylinder, the outer wall of the rotating cylinder and the outer side of the driving rod form the cavitation cavity.

[0019] The specific structure of the separation cavity is that the end of the fixed cylinder away from the motor is the heavy phase liquid outlet; the inner end of the rotating cylinder extends to a position close to the heavy phase liquid outlet; the area between the outer wall of the cavitation cylinder and the inner wall of the fixed cylinder, plus the area between the baffle, the inner wall of the fixed cylinder, the outer wall of the rotating cylinder and the heavy phase liquid outlet, jointly form the separation cavity.

[0020] When the liquid flows from the communication hole to the separation cavity, the flow rate will decrease, and it is difficult to form a cyclone. Based on this, a further improvement is that the rotating cylinder is provided with a spiral blade at a position close to the baffle in the separation cavity.

[0021] Since the light phase oil flowing into the inner cavity of the rotating cylinder still contains a small amount of water, in order to further improve the oil-water separation efficiency, the inner cavity of the rotating cylinder is provided with a spiral guide plate at one end close to the heavy phase liquid outlet; the part of the rotating cylinder located in the cavitation cavity is provided with a separation hole. In this way, the guide plate cuts the light phase oil entering the inner cavity of the rotating cylinder, realizes oil-water separation, and guides the fluid into a cyclone. When this fluid flows to the light phase fluid cavity, the heavy phase water flows to the inner wall of the rotating cylinder and enters the cavitation cavity from the separation hole, and the light phase oil flows into the light phase fluid cavity.

[0022] Further, the inner wall of the cavitation cylinder is provided with protruding protrusions between the flow-through holes. The design of the protrusions can increase the shearing effect of the fluid and enhance the rotational shearing cavitation effect.

[0023] The beneficial effects of the present invention are: 1. Under the combined action of the rotation of the guide vane and the addition of the demulsifier at the additive inlet, the water-in-oil emulsion can be broken up to achieve oil-water separation; 2. The driving rod is driven to rotate by the rotation of the rotating drum, and the fluid is sheared under the action of the connecting hole to produce cavitation, thereby increasing the contact area between the shock wave and micro-jets generated by the collapse of the cavitation bubble and the small-particle emulsion, fully breaking the water-in-oil emulsion and achieving the separation of oil and water; 3. The cavitation hole not only provides a channel for the fluid to flow to the separation chamber, but also the setting of the cavitation hole can form a Venturi tube in the fluid channel, generating a Venturi tube-type hydraulic cavitation effect, achieving re-cavitation, further enhancing the cavitation effect, and fully achieving the separation of oil and water; 4. Under the action of the cyclonic centrifugal force, the liquid entering the separation chamber, the heavy phase water with high density flows to the inner wall of the fixed cylinder and rotates along the wall to flow out of the heavy phase liquid outlet; the light phase oil with low density flows out from the light phase liquid outlet, thereby achieving oil-water separation. Compared with the prior art, the present invention not only has a short processing time, high processing efficiency and no clogging, but also has a simple structure, a simple process flow and low operation and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below with reference to the accompanying drawings and examples.

[0025] Figure 1 It is a structural schematic diagram of the present invention;

[0026] Figure 2 It is a front cross-sectional view of the present invention;

[0027] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0028] In the figure: 1. Fixed cylinder; 2. Dispersion chamber; 3. Cavitation chamber; 4. Separation chamber; 5. Light phase fluid chamber; 6. Heavy phase fluid outlet; 7. Light phase fluid outlet; 8. Additive inlet; 9. Rotating cylinder; 10. Motor; 11. Guide vane; 12. Bottom plate; 13. Partition plate; 14. Liquid inlet; 15. Connecting hole; 16. Inlet pipe; 17. Cavitation cylinder; 18. Fixed plate; 19. Baffle; 20. Blade; 21. Guide plate; 22. Bump; 23. Separation hole; 24. Cavitation hole; 25. Drive rod. DETAILED DESCRIPTION

[0029] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0030] like Figure 1 and Figure 2 As shown, the present invention discloses a hydraulic cavitation demulsification and cyclone separation device for emulsified oil wastewater, comprising a horizontally arranged cylindrical fixed cylinder 1. Figure 2For the main view, the fixed cylinder 1 is inserted with coaxially arranged rotating cylinder 9, specifically: the left end of the fixed cylinder 1 is provided with the bottom plate 12, the right end of the rotating cylinder 9 passes through the bottom plate 12 and is hidden in the fixed cylinder 1, and the right end of the rotating cylinder 9 extends to the position close to the right end of the fixed cylinder 1. The rotating cylinder 9 is rotatably connected through the bearing, and the connection between the rotating cylinder 9 and the bottom plate 12 is sealed through the mechanical seal. The left end of the rotating cylinder 9 protrudes out of the bottom plate 12 to the left and is connected with the rotating shaft of the motor 10 through the shaft coupling, so that the motor 10 can drive the rotating cylinder 9 to rotate.

[0031] The fixed cylinder 1 is also provided with a partition plate 13 close to the bottom plate 12 and arranged in a spaced manner with the bottom plate 12, and the partition plate 13 and the rotating cylinder 9 are sealed by a sealing ring. In this way, the bottom plate 12, the partition plate 13, the inner wall of the fixed cylinder 1 and the outer wall of the rotating cylinder 9 form a light phase fluid cavity 5; the part of the rotating cylinder 9 located in the light phase fluid cavity 5 is provided with a communication hole 15, and the communication hole 15 communicates the light phase fluid cavity 5 and the inner cavity of the rotating cylinder 9. The top of the light phase fluid cavity 5 is provided with a light phase fluid outlet 7.

[0032] The right side of the partition plate 13 is the dispersion cavity 2, and the lower end of the dispersion cavity 2 is provided with a liquid inlet 14, and the emulsified oil wastewater flows into the dispersion cavity 2 from the liquid inlet 14. The upper end of the dispersion cavity 2 is provided with an additive inlet 8 for adding demulsifier. The part of the rotating cylinder 9 located in the dispersion cavity 2 has a helical guide vane 11 on its outer wall, which is used to disperse the oil-in-water emulsion by rotating the rotating cylinder 9, to mix the emulsified oil wastewater and the demulsifier, and to form a cyclone of the liquid in the dispersion cavity 2 and flow to the cavitation cavity 3.

[0033] The outer wall of the fixed cylinder 1 is also connected with a volute-shaped input pipe 16 in the radial direction, the inner side of the input pipe 16 covers the fixed cylinder 1, and the outlet end of the input pipe 16 communicates with the dispersion cavity 2, and the inlet end is the liquid inlet 14. The flow direction of the emulsified oil wastewater at the outlet end of the input pipe 16 is consistent with the rotating direction of the rotating cylinder 9. In this way, the flow rate of the emulsified oil wastewater entering the dispersion cavity 2 can be improved, and the separation efficiency can be improved.

[0034] A cavitation cylinder 17 is coaxially arranged in the fixed cylinder 1, and a plurality of circular cavitation holes 24 are arranged on the cylinder wall of the cavitation cylinder 17. The cavitation holes 24 can be arranged in concentric circles, spirally or staggered. The rotating cylinder 9 is arranged in the cavitation chamber 3 and is provided with driving rods 25 extending radially outward. The driving rods 25 can be in the shape of a cylinder, a cylinder with a hemispherical top, an equi-width rectangle, an equi-central angle sector or a trapezoid. The axial spacing of the driving rods 25 is 0.25-2 times the diameter to ensure the fluid flow and cavitation effect. If the axial spacing is less than 0.25 times the diameter, the space between the adjacent driving rods 25 is limited, the fluid flow is poor, and the cavitation bubbles are difficult to grow and develop. When the cavitation bubbles collapse, the energy generated by the collapse of the cavitation bubbles is easily absorbed and dissipated by the surrounding structure, and it is difficult to form effective and useful large-scale cavitation effect. If the axial spacing is more than 2 times the diameter, the change of the local fluid pressure caused by the driving rods 25 is weakened, and it is difficult to form a large number of cavitation bubbles and achieve ideal cavitation effect. The cavitation chamber 3 and the separation chamber 4 are connected through the circular cavitation holes 24, and the cavitation holes 24 are in clearance fit with the driving rods 25. When the rotating cylinder 9 rotates, the liquid is cavitated and the emulsified oil wastewater is broken. One end of the cavitation cylinder 17 is connected with an outwardly protruding fixed plate 18, and the outer side of the fixed plate 18 is fixedly connected with the inner side of the fixed cylinder 1. The other end of the cavitation cylinder 17 is connected with an inwardly protruding baffle 19, and the baffle 19 is in clearance fit with the rotating cylinder 9. The inner wall of the cavitation cylinder 17, the outer wall of the rotating cylinder 9 and the outer side of the driving rods 25 form the cavitation chamber 3. The cavitation holes 24 not only provide a channel for the fluid to flow into the separation chamber 4, but also realize re-cavitation when the fluid passes through the cavitation holes 24, further enhance the cavitation effect, and fully separate the oil and water.

[0035] As shown in Figure 3 , the inner wall of the cavitation cylinder 17 is further provided with protruding semispherical blocks 22 between the flow holes. The design of the blocks 22 can increase the fluid shear effect and enhance the rotating shear cavitation effect.

[0036] The separation chamber 4 is formed between the baffle 19, the inner wall of the fixed cylinder 1, the outer wall of the rotating cylinder 9 and the heavy phase liquid outlet.

[0037] The right end of the fixed cylinder 1 is the heavy phase liquid outlet. The area between the outer wall of the cavitation cylinder 17 and the inner wall of the fixed cylinder 1, and the area between the baffle 19, the inner wall of the fixed cylinder 1, the outer wall of the rotating cylinder 9 and the heavy phase liquid outlet jointly form the separation chamber 4.

[0038] When the liquid flows from the communication hole 15 to the separation cavity 4, the flow rate is reduced, and it is difficult to form a cyclone, therefore, the rotating drum 9 is provided with a spiral-shaped blade 20 at the position close to the baffle 19 in the separation cavity 4, so that the fluid entering the separation cavity 4 re-forms a stable cyclone. The heavy phase water moves to the inner wall of the fixed cylinder 1 and rotates out of the heavy phase fluid outlet 6, and the light phase oil enters the light phase fluid cavity 5 and flows out from the light phase fluid outlet 7.

[0039] The area of the fixed cylinder 1 on the right side of the baffle 19 is tapered, and the diameter decreases to the right side, so that when the fluid flows to the heavy phase fluid outlet 6, the flow rate is larger, and the separation efficiency can be improved.

[0040] A plurality of through holes are also formed in the baffle 19 to prevent the fluid from being accumulated.

[0041] The working principle of the present application is that 1, under the joint action of the guide vane 11 rotation and the addition of the additive inlet 8, the oil-in-water emulsion can be dispersed, and the oil-water separation can be realized; 2, the rotating drum 9 rotates to drive the driving rod 25 to rotate, and under the action of the communication hole 15, the fluid is sheared to produce cavitation effect, the contact area of the impact wave and microjet produced by the collapse of the cavitation bubble with the small particle emulsion is increased, the oil-in-water emulsion is fully broken, and the oil and water separation is realized; 3, the cavitation hole 24 not only provides a channel for the fluid to flow to the separation cavity 4, but also the cavitation hole 24 can make the fluid channel form a Venturi tube, and the Venturi tube type water power cavitation effect is generated, the re-cavitation is realized, the cavitation effect is further enhanced, and the oil and water separation is fully realized; 4, the liquid entering the separation cavity 4 is subjected to the action of cyclone centrifugation, the heavy phase water with large density flows to the inner wall of the fixed cylinder 1 and rotates along the wall to flow out of the heavy phase liquid outlet; the light phase oil with small density flows out of the light phase liquid outlet, so that the oil-water separation is realized.

[0042] Compared with the prior art, the present application has the advantages of short processing time, high processing efficiency, no blocking phenomenon, simple structure, simple process flow, and low operation and maintenance cost.

[0043] Since the light phase oil flowing into the inner cavity of the rotating drum 9 still contains a small amount of water, in order to further improve the oil-water separation efficiency, the inner cavity of the rotating drum 9 close to the heavy phase liquid outlet is provided with a spiral-shaped flow guide plate 21; the part of the rotating drum 9 located in the cavitation cavity 3 is provided with a separation hole 23. In this way, the flow guide plate 21 cuts the light phase oil entering the inner cavity of the rotating drum 9, realizes oil-water separation, and guides the fluid to form a cyclone. When the fluid flows to the light phase fluid cavity 5, the heavy phase water flows to the inner wall of the rotating drum 9 and enters the cavitation cavity 3 from the separation hole 23, and the light phase oil flows into the light phase fluid cavity 5.

[0044] With the above ideal embodiments according to the present application as the inspiration, through the above description, relevant staff can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. A hydraulic cavitation demulsification and cyclone separation device for emulsified oil wastewater, characterized in that: It comprises a fixed cylinder (1), wherein the inner cavity of the fixed cylinder (1) is provided with a dispersion cavity (2), a cavitation cavity (3), a separation cavity (4) and a light phase fluid cavity (5) which are connected in sequence; The separation chamber (4) is provided with a heavy phase fluid outlet (6), and the light phase fluid chamber (5) is provided with a light phase fluid outlet (7); The dispersion chamber (2) is provided with an additive inlet (8) for adding a demulsifier; The dispersion chamber (2) is provided with a liquid inlet (14), and the emulsified oil wastewater flows into the dispersion chamber (2) from the liquid inlet (14); A rotating drum (9) coaxially arranged with the fixed drum (1) is further provided in the dispersion chamber (2). The rotating drum (9) is driven to rotate by a motor (10). The outer wall of the rotating drum (9) is provided with a spiral guide vane (11). The rotating drum (9) is used to break up the oil-in-water emulsion, mix the emulsified oil wastewater and the demulsifier, and form a vortex of the liquid in the dispersion chamber (2) to flow toward the cavitation chamber (3). The rotating drum (9) extends to the cavitation chamber (3), and a driving rod (25) extending radially outward is provided on the portion of the rotating drum (9) located in the cavitation chamber (3); the cavitation chamber (3) and the separation chamber (4) are connected via a circular cavitation hole (24), and the cavitation hole (24) and the driving rod (25) are clearance-matched, so that when the rotating drum (9) rotates, cavitation occurs in the liquid, thereby breaking up the emulsified oil wastewater; The fluid entering the separation chamber (4) is subjected to cyclonic flow, and the heavy phase water migrates to the inner wall of the fixed cylinder (1) and rotates to flow out from the heavy phase fluid outlet (6), while the light phase oil enters the light phase fluid chamber (5) and flows out from the light phase fluid outlet (7); The fixed cylinder (1) is provided with a bottom plate (12) at one end close to the motor (10), and a partition plate (13) is provided in the fixed cylinder (1) and spaced apart from the bottom plate (12); The partition (13) and the rotating drum (9) are connected via a sealing ring; The bottom plate (12), the partition plate (13), the inner wall of the fixed cylinder (1) and the outer wall of the rotating cylinder (9) form a light phase fluid chamber (5); The portion of the drum (9) located in the light phase fluid cavity (5) is provided with a communication hole (15), and the communication hole (15) communicates with the light phase fluid cavity (5) and the inner cavity of the drum (9); A cavitation cylinder (17) is coaxially arranged inside the fixed cylinder (1); the cavitation hole (24) is arranged on the cavitation cylinder (17); one end of the cavitation cylinder (17) is connected to a fixing plate (18) protruding outward, and the outer side surface of the fixing plate (18) is fixedly connected to the inner side surface of the fixed cylinder (1); The other end of the cavitation cylinder (17) is connected to an inwardly protruding baffle (19), and the baffle (19) is clearance-fitted with the rotating cylinder (9); The inner wall of the cavitation cylinder (17), the outer wall of the rotating cylinder (9) and the outer side of the driving rod (25) form a cavitation chamber (3); One end of the fixed cylinder (1) away from the motor (10) is a heavy phase liquid outlet (6); The inner end of the rotating drum (9) extends to a position close to the heavy phase liquid outlet (6); The area between the outer wall of the cavitation cylinder (17) and the inner wall of the fixed cylinder (1), plus the area between the baffle (19), the inner wall of the fixed cylinder (1), the outer wall of the rotating cylinder (9) and the heavy phase liquid outlet (6), together constitute the separation chamber (4).

2. The hydraulic cavitation demulsification and cyclone separation device for emulsified oil wastewater according to claim 1, characterized in that: The dispersion chamber (2) is radially connected to a volute-shaped input pipe (16), the inner side of the input pipe (16) is in contact with the fixed cylinder (1), the outlet end of the input pipe is in communication with the dispersion chamber (2), and the inlet end is the liquid inlet (14); The flow direction of the emulsified oil wastewater at the outlet end of the input pipe (16) is consistent with the rotation direction of the drum (9).

3. The hydraulic cavitation demulsification and cyclone separation device for emulsified oil wastewater according to claim 1, characterized in that: The rotating drum (9) is provided with spiral blades (20) at a position close to the baffle (19) in the separation chamber (4).

4. The hydraulic cavitation demulsification and cyclone separation device for emulsified oil wastewater according to claim 3, characterized in that: A spiral guide plate (21) is provided at one end of the inner cavity of the drum (9) close to the heavy phase liquid outlet (6); The portion of the rotating drum (9) located in the cavitation chamber (3) is provided with a separation hole (23).

5. The hydraulic cavitation demulsification and cyclone separation device for emulsified oil wastewater according to claim 1, characterized in that: The inner wall of the cavitation cylinder (17) is further provided with raised bumps (22) between the cavitation holes (24).

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