Rapid separation and recovery device for oil spill on sea surface

Abstract

The present invention relates to a rapid separation and recovery device for oil spill on the sea surface, comprising a support frame, a vortex recovery tank, vortex blades, a motor, a submersible pump and a primary vortex separator, wherein both ends of the lower part of the support frame are connected with buoys, the vortex recovery tank is fixed on the support frame, the vortex blades are located in the vortex recovery tank, the motor is vertically fixed to the middle position directly above the vortex recovery tank through the support frame, the motor is connected to the vortex blades directly below it, a hole is opened at the bottom center of the vortex recovery tank, the submersible pump vertically passes through the opening and is fixed at the opening, the liquid inlet of the submersible pump is located at the oil layer height after the liquid in the vortex recovery tank forms a Rankine combination vortex, and the liquid outlet of the submersible pump is connected to the primary vortex separator through a primary mixed liquid pipeline. The present invention has a small size, light weight, and is easy to transport and install, and can be quickly towed to the oil spill site; compared with the traditional direct extraction method, a mixed liquid with a higher oil phase content can be transported to the separation device, further improving the separation efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of sea surface oil spill recovery, and in particular relates to a sea surface oil spill rapid separation and recovery device. Background Art

[0002] Against the backdrop of the world economic recovery and sustained growth, the development of the world's oil industry has ushered in new opportunities. my country has vast sea areas, and there are rich oil resources waiting to be exploited in the Bohai Bay, the South China Sea and other sea areas. However, in the process of crude oil extraction and gathering, crude oil leakage may occur. In view of the density difference between crude oil and seawater and the incompatibility between the two, the leaked crude oil will float in the sea near the leakage site in a free state, causing extremely adverse effects on the ecosystem around the sea area, threatening the safety of life and property of the staff, and the leaked crude oil is also a huge waste for the mining unit. Recovering the leaked crude oil on the sea surface can not only protect the environment, but also reduce the economic losses of the crude oil mining unit. Therefore, it is of great significance to arrange an offshore floating oil recovery device to collect floating crude oil on the sea surface for pre-separation treatment.

[0003] The current methods for handling oil spills mainly include physical methods, chemical methods, biological methods, etc. Among them, the chemical preparation method treats the oil spill on the sea surface by spreading chemical reagents such as dispersants, oil collection agents or oil gelling agents. It is easy to use and is not affected by weather and sea conditions, but it has disadvantages such as high cost and "secondary pollution". Biological methods are mainly used for the degradation of oil spills and have not yet played a role in recovery. The physical removal method is the most ideal and can avoid the generation of appendages during the disposal process, including containment, mechanical recovery, oil absorption materials and other disposal methods, and therefore has been widely used.

[0004] Due to the vastness of the Bohai Sea and the South China Sea, in order to fully and timely recover and separate the spilled crude oil, it is necessary to arrange the floating oil recovery and separation system on the engineering ship. However, due to the space and weight limitations on the engineering ship, and the requirement in the specification that the oil content in the ship's sea discharge liquid is less than 15ppm, the traditional oil spill recovery and separation device located on the sea surface can only separate the oil-water mixture at a lower feed rate, with low processing efficiency, and cannot recover the floating oil before the floating oil spreads, so as to meet the time and efficiency requirements of the operating unit. At the same time, considering that different equipment are integrated in the form of skid-mounted modules, it has the advantages of easy installation, maintenance and replacement, and space saving, which can achieve the purpose of rapid reduction of the amount of oil spill recovery, and further enhance the existing oil spill emergency response capabilities. In summary, we urgently need to develop a new type of sea surface oil spill separation device, so that it can be used before the offshore oil spill enters the processing equipment on the engineering ship for separation, and the floating oil is preliminarily treated on the sea surface through the built floating device, so as to greatly improve the efficiency of oil spill separation and recovery. Summary of the invention

[0005] The present invention is mainly aimed at solving the accident that the crude oil leaks and floats near the leakage site due to pipeline leakage and other reasons during the collection and transportation of crude oil in offshore marginal oil fields.

[0006] In order to solve the above problems, the present invention provides a device for rapid separation and recovery of oil spills on the sea surface. After being installed on the shore, the device can be moored near an engineering ship through a mooring cable, and then towed and transported to the oil spill site by the engineering ship to work. It is used as a pre-separation and processing device for oil spill recovery equipment on engineering ships, and has low requirements for the engineering ships on board. The main body of the device is fixed on the frame, and the buoyancy required is provided by a buoy to facilitate its migration and reuse. The system has low operating costs and a short manufacturing period; it is very convenient to use, install, disassemble and move, and the cost and operating costs are also very low. At the same time, it can greatly improve the efficiency of floating oil recovery and separation, and reduce the pressure of system equipment to separate crude oil. It can be used in various sea areas such as the Bohai Sea and the Yellow Sea.

[0007] The present invention is achieved as follows: a rapid separation and recovery device for oil spills on the sea surface comprises a supporting frame, a vortex recovery tank, vortex blades, a motor, a submersible pump and a first-stage vortex separator, wherein both ends of the lower part of the supporting frame are connected with buoys, the vortex recovery tank is fixed on the supporting frame, the vortex blades are located in the vortex recovery tank, the motor is vertically fixed to the middle position directly above the vortex recovery tank through the supporting frame, the motor is connected to the vortex blades directly below it, the bottom center of the vortex recovery tank is opened, the submersible pump vertically passes through the opening and is fixed at the opening, the liquid inlet of the submersible pump is located at the oil layer height after the liquid in the vortex recovery tank forms a Rankine combination vortex, and the liquid outlet of the submersible pump is connected to the first-stage vortex separator through a first-stage mixed liquid pipeline.

[0008] The buoy provides the necessary buoyancy for the device to ensure that it floats on the sea surface. The top eaves of the vortex recovery tank are placed in the oil layer so that the seawater can just fill the vortex recovery tank and maintain balance, so that the oil layer liquid surface and the liquid inlet form a funnel-shaped liquid surface, and the oil body fills the vortex recovery tank by gravity. The vortex blades are driven by the motor to rotate, and the liquid in the vortex recovery tank moves under the action of the vortex blades to generate acceleration in the tangential direction of the circle, thereby forming a vortex in the vortex recovery tank. Due to the difference in density between the spilled oil and the seawater, the seawater with a higher density will be located in the outermost layer of the vortex under the action of centrifugal force, while the spilled oil is concentrated in the inner layer, and the mixed liquid presents the characteristics of stratified flow in the vortex recovery tank. The height of the liquid inlet of the submersible pump is controlled at the height of the oil layer of the vortex in the tank, and the separated oil is extracted and transported to the first-stage vortex separator for further separation. The seawater after the preliminary separation of the floating oil is discharged back to the sea, reducing the flow rate at the inlet of the separation equipment on the engineering ship, reducing the working pressure of the processing equipment on the engineering ship, and improving its working efficiency.

[0009] In the above technical solution, preferably, a roof eave is provided around the top of the vortex recovery tank, and when the entire device floats on the sea surface, the roof eave of the vortex recovery tank is parallel to the sea level.

[0010] In the above technical solution, preferably, the cross-section of the vortex recovery groove is circular, and the longitudinal section is an inverted trapezoid.

[0011] In the above technical solution, preferably, the vortex recovery tank is fixedly installed at the head of the support frame, and the first-stage vortex separator is fixedly installed at the tail of the support frame.

[0012] In the above technical scheme, preferably, the first-stage vortex separator includes a separation section and a water removal section, the separation section is a straight tube, and the water removal section is composed of a conical tube and a sleeve sleeved on the outside of the conical tube, one end of the straight tube is an oil inlet, and the other end of the straight tube is connected to the large diameter end of the conical tube, a guide plate is arranged inside the straight tube near its oil inlet, and small holes evenly distributed in the tangential direction are opened on the wall surface of the conical tube, the small diameter end of the conical tube is an oil outlet, and a water outlet is opened on the sleeve.

[0013] In the above technical solution, it is further preferred that the inner diameter of the straight tube is equal to the inner diameter of the large diameter end of the tapered tube.

[0014] In the above technical solution, it is further preferred that two water outlets are axially symmetrically arranged on the sleeve.

[0015] The oil-water mixture can be further separated inside the first-stage vortex separator. The oil outlet transports the separated high-oil phase content mixture to the engineering ship through a pipeline for further separation, and the water outlets on both sides discharge the low-oil phase content mixture back to the sea. The delivery pipelines of each outlet are connected to the flow meter and pressure gauge to control the discharge ratio of each outlet. All flow meters, presses and other instruments are fixed on the support frame.

[0016] In the above technical solution, preferably, a lifting lug for lifting the mobile device is fixed on the support frame.

[0017] In the above technical solution, preferably, the size of the entire device is within 3m×1.5m×1.5m.

[0018] The recovery device itself has equipment features such as explosion-proof / seawater-proof / corrosion-proof / level three sea conditions to ensure its normal operation on the sea.

[0019] The present invention is a rapid separation and recovery device for oil spills on the sea surface. After being installed on the shore, it can be towed and transported to the oil spill site by an engineering ship to start working. The main body of the device is fixed on the support frame, and the buoyancy required is provided by the buoy, which is convenient for its migration and use. This new type of oil spill recovery and separation device has low operating costs and a short manufacturing period; it is very convenient to use, install, disassemble and move, and the cost and operating costs are also very low. At the same time, it can greatly improve the efficiency of oil spill recovery and separation, and reduce the pressure of equipment to separate crude oil. It can be used in a variety of sea areas.

[0020] Compared with the prior art, the present invention has the following advantages and positive effects:

[0021] 1. The top eaves of the vortex recovery tank of the present invention are placed in the oil layer, and the liquid surface of the oil layer and the liquid inlet of the vortex recovery tank form a funnel-shaped liquid surface. In the vortex recovery tank, the vortex blades are driven by a motor to rotate to form a vortex, and the oil layer and the water layer are efficiently separated by centrifugal force. The height of the submersible pump is adjusted to extract the floating oil in the oil layer as much as possible; at the same time, as the floating oil is gradually extracted, the oil level in the container drops, and the surface oil of the sea surface continues to flow along the top eaves and wall of the container to the liquid inlet, and the pump continues to extract, thereby forming a cycle. Compared with the traditional direct extraction method, a mixed liquid with a higher oil phase content can be transported to the separation device, further improving the separation efficiency.

[0022] 2. The first-stage vortex separator of the present invention has small size, light weight, small footprint, short processing time, high separation efficiency, no moving parts, and is easy to operate and maintain.

[0023] 3. The present invention adopts a compact process and efficient pipeline equipment, shortening the usual process of oil spill collection and recovery, making the entire process systematic and efficient.

[0024] 4. The whole set of the device of the present invention is small in size and light in weight, occupies a small skid-mounted area, space and weight, is easy to transport and install, and can be quickly towed to the oil spill site by an engineering vessel.

[0025] 5. The present invention improves the service life of platform process equipment and subsea pipelines and platform production safety by rationally selecting materials, adding corrosion detection facilities and adding appropriate corrosion inhibitors. It can reduce equipment corrosion, extend the service life and service life of its process facilities, and reduce investment and maintenance costs.

[0026] 6. The oil spill recovery device on the sea buoy of the present invention can directly separate the oil spill preliminarily on the sea level, which belongs to the local self-circulation of oil-water mixed liquid on the sea level, and is not affected by the requirements of the regulations on the content of oily wastewater discharged into the sea. Therefore, the quality of the mixed liquid for further separation on the engineering ship is reduced, the working pressure of the recovery separation module on the engineering ship is reduced, and the floating oil on the sea is recovered and separated more effectively. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a three-dimensional diagram of the rapid separation and recovery device for oil spill on the sea surface of the present invention;

[0028] Figure 2 This is a front view of the rapid separation and recovery device for oil spill on the sea surface of the present invention;

[0029] Figure 3 2. It is a top view of the device for rapid separation and recovery of oil spill on sea surface of the present invention;

[0030] Figure 4 It is a structural schematic diagram of a primary vortex separator of the present invention;

[0031] Figure 5 It is a schematic diagram of the liquid surface shape after the vortex recovery tank of the present invention is filled with oil-water mixture;

[0032] Figure 6 is a schematic diagram of a vortex formed in a vortex recovery tank of the present invention;

[0033] Figure 7 It is a schematic diagram of the shape of the vortex formed in the vortex recovery tank of the present invention.

[0034] In the figure: 1. vortex recovery tank; 2. support frame; 3. submersible pump; 4. motor; 5. vortex blade; 6. primary mixed liquid pipeline; 7. flange; 8. front lifting ear; 9. primary vortex separator; 10. flow meter; 11. oil phase outlet switch valve; 12. water phase outlet switch valve 1; 13. water phase outlet switch valve 2; 14. oil outlet; 15. left water outlet; 16. right water outlet; 17. rear lifting ear; 18. front buoy; 19. rear buoy; 20. oil inlet; 21. guide vane; 22. separation section; 23. water removal section; 24 casing; 25. cone tube; 26. small hole. DETAILED DESCRIPTION

[0035] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings:

[0036] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "inside", "outside", "top", "bottom", "horizontal", "vertical", etc. indicate orientations or positional relationships based on the orientations or positional relationships 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 a limitation on the present invention.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] Example

[0039] See also Figures 1 to 3 The present embodiment provides a rapid separation and recovery device for oil spills on the sea surface, including a support frame 2, a vortex recovery tank 1, vortex blades 5, a motor 4, a submersible pump 3 and a first-stage vortex separator 9. Both ends of the lower part of the support frame 2 are connected with buoys. Specifically, the support frame 2 is connected with six buoys at its both ends, wherein two long buoys 18 are fixed at the left and right ends of the bow, and four short buoys 19 are fixed at the left and right ends of the tail. The vortex recovery tank 1 is fixed at the head of the support frame 2, the vortex blades 5 are located in the vortex recovery tank 1, the motor 4 is vertically fixed at the middle position directly above the vortex recovery tank 1 through the support frame 2, the motor 4 is connected to the vortex blades 5 directly below, the bottom center of the vortex recovery tank 1 is opened, the submersible pump 3 vertically passes through the opening and is fixed at the opening, the liquid inlet of the submersible pump 3 is located at the oil layer height after the liquid in the vortex recovery tank forms a Rankine combination vortex, the liquid outlet of the submersible pump 3 is connected to the primary vortex separator 9 through the primary mixed liquid pipeline 6, the outlet of the primary mixed liquid pipeline 6 is connected to the inlet of the primary vortex separator 9 through the flange 7, and the operating capacity is 300m 3 The submersible pump 3 with a capacity of 1000 rpm and a flow rate of 200 rpm can meet the needs of large processing capacity, thereby completing the recovery and separation of floating oil on the sea surface in a shorter time. The first-stage vortex separator 9 is fixedly installed at the tail of the support frame 2.

[0040] The top of the vortex recovery tank 1 is provided with eaves around it. When the whole device floats on the sea surface, the eaves of the vortex recovery tank are parallel to the sea level, so that the spilled oil can enter the vortex recovery tank with the action of the waves.

[0041] The cross section of the vortex recovery tank 1 is circular, and the longitudinal section is an inverted trapezoid, so that the liquid in the vortex recovery tank is easier to form a Rankine combination vortex.

[0042] See also Figure 4The first-stage vortex separator 9 includes a separation section 22 and a water removal section 23. The separation section 22 is a straight tube. The water removal section 23 is composed of a cone tube 25 and a sleeve 24 sleeved on the outside of the cone tube. One end of the straight tube is an oil inlet 20. The other end of the straight tube is connected to the large diameter end of the cone tube 25. The inner diameter of the straight tube is equal to the inner diameter of the large diameter end of the cone tube. A guide plate 21 is arranged in the straight tube near its oil inlet 20. The wall surface of the cone tube 25 is provided with small holes 26 evenly distributed in the tangential direction. The small diameter end of the cone tube 25 is an oil outlet 14. The sleeve 24 is provided with a water outlet. Two water outlets are arranged on the sleeve in an axisymmetric manner. The delivery pipelines of the two water outlets and the oil outlet are connected with flow meters, pressure gauges, and switch valves (in this embodiment, the delivery pipeline of the left water outlet 15 shows the water phase outlet switch valve 2 13, the delivery pipeline of the right water outlet 16 shows the water phase outlet switch valve 12, and the delivery pipeline of the oil outlet 14 shows the oil phase outlet switch valve 11 and flow meter 10) to control the discharge ratio of each outlet. All flow meters, pressure gauges, switch valves, etc. are fixed on the support frame.

[0043] The support frame 2 is fixed with lifting lugs for lifting the mobile device, which is convenient for lifting the device to be arranged on the sea level by lifting equipment. The size of the entire device is limited to 3m×1.5m×1.5m, and is welded to the support frame to provide the required support.

[0044] The upper surface of the vortex recovery tank 1 is approximately parallel to the sea level. The spilled oil enters the vortex recovery tank with the action of the waves, so that the oil layer liquid surface and the liquid inlet form a funnel-shaped liquid surface. Figure 5 In the vortex recovery tank 1, the motor 4 drives the vortex blade 5 to rotate and separate the oil and water. Then, by adjusting the vertical height of the submersible pump 3, its liquid inlet is controlled as much as possible at the separated oil layer. 3 The mixed liquid is pumped into the primary vortex separator 9 by a submersible pump with a flow rate of 1000 rpm and further separated by the density difference between oil and water. The separated mixed liquid is transported to the engineering ship through a delivery pipeline, so that the oil-water mixed liquid entering the oil spill recovery module on the engineering ship has a higher oil content, thereby greatly improving the working efficiency of the next module.

[0045] After the initial separation of floating oil, the seawater can be discharged back to the sea on the buoy. Considering that the device is not installed on the engineering ship, it is not subject to the regulatory requirement that the oil content in the liquid discharged to the sea must be lower than 15ppm, and the operation is more flexible and free. 3 The oil-water mixture extracted by the submersible pump at a flow rate of 200m / h has a 3 / h of liquid is initially separated from the floating oil and then discharged back into the sea. The flow rate of the oil-water mixture that actually enters the engineering ship for further separation is only 100m3 / h. This greatly reduces the working pressure of the recycling separation device on the engineering ship.

[0046] When the vortex blades 5 rotate, due to the centrifugal effect, the mixed liquid in the adjacent blades quickly moves toward the outer edge, transferring energy. The hydraulic pressure is quickly superimposed, forming high pressure or high force, which increases its speed until a stable strong vortex field is formed in the vortex recovery tank. The oil phase with lower density is concentrated in the center of the vortex recovery tank, while the seawater with higher density forms a ring around the wall of the vortex recovery tank, achieving the purpose of two-phase separation. Figure 6 The submersible pump is placed in parallel with the first-stage vortex separator, with half of the pump body in the vortex recovery tank and the other half passing through the vortex recovery tank through the opening, connected and fixed by the support frame, extracting the floating oil layered under the action of centrifugal force and transporting it to the first-stage vortex separator for further separation.

[0047] After the floating oil is extracted by the submersible pump 3, it enters the first-level vortex separator 9 through the pre-installed first-level mixed liquid pipeline 6 to further separate the oil and water. The first-level vortex separator (guide vane separator) is a separation device designed according to the principle of centrifugal separation. It is mainly used to quickly separate two-phase mixed fluids with density difference. Its main advantages are small size, light weight, small footprint, short processing time, high separation efficiency, no moving parts, and easy operation and maintenance. The incoming liquid enters from the oil inlet 20 of the first-level vortex separator, and forms a stable strong cyclonic field in the tube through the spiral guide vane 21 installed in the tube, so that the oil phase with lower density forms a core at the center of the tube axis, and the water phase with higher density forms a ring around the tube wall, so as to achieve the purpose of two-phase separation. Then, according to the distribution state of the two phases in this flow, it enters the water removal section 23 of the separator. When the water ring enters, it will enter the outer sleeve 24 from the small hole 26 of the cone tube 25, and then flow out of the first-stage vortex separator from the water outlet. At the same time, the oil core continues to flow forward and flows out from the cone tube oil outlet 14, so that the two phases are completely separated. The mixed liquid with high oil phase content after separation is discharged through the oil outlet and transported to the engineering ship through the delivery pipeline for further separation. The water outlets on both sides can discharge the mixed liquid with low oil phase content back to the sea to reduce the processing pressure of the equipment on the engineering ship.

[0048] When the motor drives the vortex blades to rotate, a Rankine combination vortex will be generated inside the vortex recovery tank. In the vortex core area inside the vortex, the water surface is in the shape of a parabola of rotation, while the concave surface of the water in the outer circulation area is inversely proportional to the square of the radius, as shown in the figure below: Figure 7 The axial velocity of the vortex V z for ,in z is the height from the water inlet of the submersible pump to the free surface. The velocity circulation of the entire vortex is expressed as , the circumferential speed is . Pressure along the vortex radius and height z The distribution of directions is: The pressure difference between the vortex core and the circulation area is equal, both . The pressure in the vortex core area is lower than that in the circulation area. Inside the vortex beam, the smaller the radius is, the lower the pressure is. There is a larger pressure gradient along the radial direction, so a suction effect is generated toward the center of the vortex core. The intensity of the vortex is controlled by the power of the motor. The stronger the vortex, the greater the suction effect, and the stronger the centrifugal force generated. Since the fluid flowing into the vortex core originates from the free surface rather than the entire fluid, the floating oil itself often floats on the surface of the mixed liquid due to its density. Therefore, the liquid flowing into the vortex core is mainly overflow oil, which makes the oil phase and the water phase in the mixed liquid separated more thoroughly.

[0049] The present invention overcomes the disadvantage of the relatively bulky general oil spill recovery and separation device. The device can be moved with the engineering ship at any time and rushed to different sea areas for operation. Compared with the conventional recovery and separation device, its migration and installation require less support from the engineering ship and take less time. Therefore, the use of this device can better control the cost investment of crude oil extraction.

[0050] In addition, it should be noted that some of the main production equipment in the present invention, such as the first-stage vortex separator, can be simplified in structure and operating parameters by using a pipeline separation device; and its operating pressure can be adjusted to shorten the process structure, save utility consumption, and make full use of existing space;

[0051] The specific working process of the present invention is as follows:

[0052] (1) The device is arranged on the sea level by hoisting the front lifting lug 8 and the rear lifting lug 17 using a lifting device. Each device is mainly fixed on the support frame 2, and the necessary buoyancy is provided by the front buoy 18 and the rear buoy 19, so that the device floats on the sea surface. At the same time, it is necessary to ensure that the upper surface of the vortex recovery tank 1 is parallel to the sea level, and ensure that the tank is always filled with a mixture of spilled oil and seawater.

[0053] (2) The device firstly drives the vortex blade 5 to rotate by the motor 4, stirring the oil-water mixture, thereby generating a Rankine combination vortex in the vortex recovery tank 1. The main reason for the generation of vortex is the initial disturbance in the liquid. The reason why the steady vortex can exist is that when the vortex diffuses outward, the radial flow from the outside to the inside near the free surface continuously brings the vortex from the outside to the vortex core. When the submersible pump 3 is started, a section of oil is pumped out, and a pressure difference is generated along the section perpendicular to the liquid movement speed due to the fluid flow. As the liquid is pumped out, due to the conservation of angular momentum, the angular velocity must increase, that is, obvious vortex is generated. If it is on a larger scale, the Coriolis force effect will also play a certain role in the generation of vortex. The vortex is divided into two regions: the vortex core region and the circulation region. The pressure difference between the vortex core region and the circulation region is equal. The pressure in the vortex core region is lower than that in the circulation region. There is a large pressure gradient along the radial direction of the vortex, so a suction effect toward the center of the vortex core is generated. Since the density of seawater is relatively high, it is mainly concentrated in the circulation area around the vortex, while the floating oil with a smaller density is mainly concentrated in the vortex core area at the center. Thus, the oil and water are initially separated in the vortex recovery tank 1.

[0054] (3) A hole is opened on the lower surface of the vortex recovery tank 1 to allow the submersible pump 3 to pass directly under the vortex blades 5. The side of the submersible pump 3 is fixed to the support frame 2, and the fixed position is adjusted to ensure that the liquid inlet of the submersible pump 3 is located at the oil phase position in the vortex recovery tank 1, thereby ensuring that the floating oil is pumped into the equipment as much as possible for further separation and recovery.

[0055] (4) Flow rate is 300 m 3 / h of offshore liquid, which is mainly composed of a mixed liquid of oil and water (a small amount of gas) (the oil phase content is less than 30%), is extracted by a submersible pump 3 and enters the inlet of a first-stage mixed liquid pipeline 6, and then enters a first-stage vortex separator 9 for separation and recovery of the incoming liquid.

[0056] (5) The incoming liquid enters the oil inlet 20 of the first-stage vortex separator 9, passes through the guide plate 21 installed in the pipe, and forms a stable strong cyclonic flow field in the separation section 22, so that the oil phase forms a core at the axis of the pipe, and the water phase forms a ring around the wall, so as to achieve the purpose of oil-water separation. Then it enters the water removal section 23 of the first-stage vortex separator 9. The water removal section is composed of a built-in cone 25 and an external sleeve 24. The wall of the cone 25 is provided with evenly distributed small holes 26 in the tangential direction, and the sleeve 24 is provided with a water outlet of the first-stage vortex separator 9. When the water ring enters, it will enter the external sleeve 24 from the small holes 26 of the cone 25, and then flow out of the first-stage vortex separator 9 from the left water outlet 15 and the right water outlet 16. At the same time, the oil core continues to flow forward and flows out from the oil outlet 14, and then enters the recovery separation module carried by the engineering ship through the conveying pipeline for further recovery and treatment.

[0057] In summary, the entire treatment process is carried out in motion, and the sea surface oil spill rapid separation and recovery device adopted by the present invention can greatly improve the oil spill recovery rate and recover the oil spill to the maximum extent.

[0058] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are within the scope of the technical solution of the present invention.

Claims

1. A rapid separation and recovery device for oil spill on sea surface, characterized in that: It includes a supporting frame, a vortex recovery tank, vortex blades, a motor, a submersible pump and a first-stage vortex separator, wherein both ends of the lower part of the supporting frame are connected with buoys, the vortex recovery tank is fixed on the supporting frame, the vortex blades are located in the vortex recovery tank, the motor is vertically fixed to the middle position directly above the vortex recovery tank through the supporting frame, the motor is connected to the vortex blades directly below it, the bottom center of the vortex recovery tank is opened, the submersible pump vertically passes through the opening and is fixed at the opening, the liquid inlet of the submersible pump is located at the oil layer height after the liquid in the vortex recovery tank forms a Rankine combined vortex, and the liquid outlet of the submersible pump is connected to the first-stage vortex separator through a first-stage mixed liquid pipeline; The top of the vortex recovery tank is provided with eaves around the periphery. When the whole device floats on the sea surface, the eaves of the vortex recovery tank are parallel to the sea level. The first-stage vortex separator includes a separation section and a water removal section, the separation section is a straight tube, the water removal section is composed of a conical tube and a sleeve sleeved on the outside of the conical tube, one end of the straight tube is an oil inlet, the other end of the straight tube is connected to the large-diameter end of the conical tube, a guide plate is arranged inside the straight tube near the oil inlet, small holes evenly distributed are opened on the wall surface of the conical tube in the tangential direction, the small-diameter end of the conical tube is an oil outlet, and a water outlet is opened on the sleeve.

2. The rapid separation and recovery device for oil spill on sea surface according to claim 1 is characterized in that: The cross section of the vortex recovery groove is circular, and the longitudinal section is an inverted trapezoid.

3. The rapid separation and recovery device for oil spill on sea surface according to claim 1 is characterized in that: The vortex recovery tank is fixedly installed at the head of the support frame, and the first-stage vortex separator is fixedly installed at the tail of the support frame.

4. The rapid separation and recovery device for oil spill on sea surface according to claim 1 is characterized in that: The inner diameter of the straight tube is equal to the inner diameter of the large diameter end of the tapered tube.

5. The rapid separation and recovery device for oil spill on sea surface according to claim 1 is characterized in that: Two water outlets are axially symmetrically arranged on the sleeve.

6. The rapid separation and recovery device for oil spill on sea surface according to claim 1 is characterized in that: The support frame is fixed with lifting ears for lifting the mobile device.

7. The rapid separation and recovery device for oil spill on sea surface according to claim 1 is characterized in that: The size of the entire device is within 3m×1.5m×1.5m.

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