Oil-gas-water separation device
阅读说明:本技术 一种油气水分离装置 (Oil-gas-water separation device ) 是由 耿黎东 张映红 谷磊 庞伟 于 2018-07-11 设计创作,主要内容包括:本发明提供一种油气水分离装置,包括对采出液进行油气水初级分离的初级分离组件、对初级分离的含油污水进行破乳及分离的二次除油组件、对初级分离的含水原油进行破乳及分离的二次除水组件,以及将初级分离的气体排出的排气组件,所述初级分离组件包括旋流腔体及设于旋流腔体内的旋流分离器,所述二次除油组件位于所述二次除水组件的下方,并均与所述旋流腔体连通;所述排气组件与所述旋流腔体的顶端连通。本发明具有油气水分离速度快、分离精度高,且占地空间小等优点。(The invention provides an oil-gas-water separation device, which comprises a primary separation component for performing primary separation of oil, gas and water on produced liquid, a secondary oil removal component for performing emulsion breaking and separation on primary separated oily sewage, a secondary water removal component for performing emulsion breaking and separation on primary separated oily crude oil, and an exhaust component for exhausting primary separated gas, wherein the primary separation component comprises a cyclone cavity and a cyclone separator arranged in the cyclone cavity, and the secondary oil removal component is positioned below the secondary water removal component and is communicated with the cyclone cavity; the exhaust assembly is communicated with the top end of the rotational flow cavity. The invention has the advantages of high oil-gas-water separation speed, high separation precision, small occupied space and the like.)
1. The oil-gas-water separation device is characterized by comprising a primary separation component for performing primary separation of oil, gas and water on produced liquid, a secondary oil removal component for performing emulsion breaking and separation on primary separated oily sewage, a secondary water removal component for performing emulsion breaking and separation on primary separated oily crude oil, and an exhaust component for exhausting primary separated gas, wherein the primary separation component comprises a cyclone cavity and a cyclone separator arranged in the cyclone cavity, and the secondary oil removal component is positioned below the secondary water removal component and is communicated with the cyclone cavity; the exhaust assembly is communicated with the top end of the rotational flow cavity.
2. The oil-gas-water separation device according to claim 1, wherein the secondary oil removal assembly and the secondary water removal assembly each comprise a bionic super-wetting membrane component, the bionic super-wetting membrane component comprises a roller and super-wetting membranes with different separation characteristics, and each super-wetting membrane comprises a wetting membrane body covering the surface of the roller and a plurality of arc-shaped blades circumferentially arranged along the wetting membrane body; the roller is provided with a through part for the liquid treated by the super-wetting film to flow into the roller and an inclined water outlet hole for the liquid in the roller to flow out and generate a rotational flow.
3. The oil-gas-water separation device according to claim 2, wherein the bionic super-wetting membrane components of the secondary oil removal assembly are four groups, the super-wetting membranes of the four groups of bionic super-wetting membrane components are respectively a demulsification membrane, a first hydrophilic oleophobic membrane, a heavy metal removal membrane and a desalting membrane which are sequentially arranged along the conveying direction of the oily sewage, and the mesh number of the super-wetting membranes is sequentially increased along the conveying direction of the oily sewage; the bionic super-infiltration membrane components of the secondary dewatering component are divided into two groups, the super-infiltration membranes of the two groups of bionic super-infiltration membrane components are respectively a demulsification membrane and a first oleophylic hydrophobic membrane which are sequentially arranged along the conveying direction of the water-containing crude oil, and the mesh number of the first oleophylic hydrophobic membrane is higher than that of the demulsification membrane.
4. The oil-gas-water separation device according to claim 3, further comprising an oil discharge assembly for discharging oil separated by the secondary oil removal assembly, a water discharge assembly for discharging water separated by the secondary water removal assembly, and a waste residue collector for collecting impurities removed by the super-wetting membrane, wherein the oil discharge assembly comprises an oil discharge pipeline and a second oleophylic hydrophobic membrane, the oil discharge pipeline is arranged on the secondary oil removal assembly and is positioned above the bionic super-wetting membrane part provided with the emulsion breaking membrane and the first hydrophilic oleophobic membrane, and the second oleophylic hydrophobic membrane is arranged in the oil discharge pipeline; the drainage assembly comprises a drainage pipeline and a second hydrophilic oleophobic membrane, the drainage pipeline is arranged on the secondary dewatering assembly and is positioned below the two groups of bionic super-wetting membrane components, and the second hydrophilic oleophobic membrane is arranged in the drainage pipeline; the waste residue collector is arranged below each bionic super-infiltration membrane component.
5. The oil-gas-water separation device according to any one of claims 2 to 4, wherein the secondary oil removal assembly and the secondary water removal assembly further comprise a liquid inlet channel, a separation channel and a liquid outlet channel which are sequentially communicated, the diameter of the liquid inlet channel is smaller than that of the separation channel, and the liquid inlet channel is communicated with the separation channel through a conical cyclone section; the bionic super-infiltration membrane part is arranged in the separation channel.
6. The oil-gas-water separation device according to claim 5, wherein the secondary oil removal assembly further comprises a water quality detection part for ensuring that the water quality meets the emission standard, the water quality detection part comprises a water quality detector, a backflow pipeline, a three-way valve and a one-way valve, and the water quality detector is arranged on a liquid outlet channel of the secondary oil removal assembly; one end of the return pipeline is positioned at the downstream of the water quality detector, and the other end of the return pipeline is positioned at the upstream of the bionic super-infiltration membrane component; the three-way valve is arranged at the communication position of the backflow pipeline and the liquid outlet channel; the check valve is arranged in the return pipeline.
7. The oil-gas-water separation device according to any one of claims 1 to 4, further comprising a controller, a liquid level detection piece for detecting the liquid level in the cyclone chamber, a gas regulating valve arranged on the exhaust assembly, a water outlet regulating valve arranged at the liquid inlet end of the secondary oil removal assembly, and an oil outlet regulating valve arranged at the liquid inlet end of the secondary water removal assembly; the input end of the controller is connected with the liquid level detection piece, and the output end of the controller is connected with the gas regulating valve, the water outlet regulating valve and the oil outlet regulating valve; and the controller controls the opening of the gas regulating valve, the water outlet regulating valve and the oil outlet regulating valve according to the liquid level detection value of the liquid level detection piece.
8. The oil-gas-water separation device according to claim 7, wherein the liquid inlet ends of the secondary oil removal assembly and the secondary water removal assembly are respectively provided with a pressure sensor for detecting input pressure; the bottom end of the rotational flow cavity is communicated with a bypass pipe, and a bypass valve is arranged on the bypass pipe; the input end of the controller is connected with the pressure sensor, and the output end of the controller is connected with the bypass valve; when the pressure sensor detects that the pressure rises rapidly, the controller controls the bypass valve to be opened and controls the water outlet regulating valve and the oil outlet regulating valve to be closed.
9. The oil-gas-water separation device as claimed in any one of claims 1 to 4, wherein the cyclone separator is a blade type cyclone, blades of the blade type cyclone are arranged in a spiral shape, and the included angle between the tangential direction of the blade spiral line and the blade axis is 15-75 degrees.
10. The oil-gas-water separation device as claimed in any one of claims 1 to 4, wherein the bottom of the primary separation component is provided with a U-shaped input pipe for inputting produced fluid to the cyclone cavity, an impurity removal component for removing solid-phase impurities in the produced fluid, and a demulsification pore plate for performing primary oil-water separation on the produced fluid, wherein the U-shaped input pipe is communicated with the bottom of the primary separation component; the impurity removing assembly comprises a carbon dioxide feeding port, a waste residue collecting piece and a filter screen which are sequentially arranged along the liquid inlet direction to the liquid outlet direction of the U-shaped input pipe; the demulsification pore plate is arranged between the output end of the U-shaped input pipe and the rotational flow cavity.
Technical Field
The invention relates to the field of petrochemical industry, in particular to an oil-gas-water separation device.
Background
In the oil field development and production process, an oil-gas-water three-phase separation device is one of important production equipment. At present, most oil fields on land enter the middle and later development stages, and have the characteristic of double high with high water content and high extraction degree (particularly, the water content of old oil fields in the east of China is averagely as high as more than 90 percent). A large amount of oily sewage is generated in the process of oil development, which not only increases the exploitation cost, but also pollutes the environment. Particularly for offshore oil field development, the production area is limited by an offshore platform, and the conventional onshore sewage treatment device is not suitable for offshore oil field development because of the defects of huge equipment, high cost, large occupied area, low treatment speed and the like.
The principle adopted by the existing oil-gas-water separation device mainly comprises gravity, rotational flow, air flotation, static electricity and the like. The gravity separation is to separate oil, gas and water by utilizing the density difference of oil, gas and water phases and relying on the gravity differentiation effect, and the process has the advantages of simple structure, easy operation and strong reliability, but has the defects of low separation speed, small treatment liquid amount and large occupied area. The cyclone separation is a technology for separating phases with different densities in a heterogeneous mixture by using a centrifugal sedimentation principle, the process has a compact structure, low cost and flexible installation, but the applicable oil drop particle size range generally exceeds 20 mu m, and the defects of poor universality and the like caused by easy breaking of emulsified liquid drops (oil drops or water drops) are overcome. The air floatation method is a separation technology for enriching and separating surface active substances by taking air bubbles as a separation medium, has high process efficiency and small occupied area, but has the defects of high construction cost, poor impurity removal effect on high-density and large volume and the like. The electrostatic separation is a method for separating particles by generating electrostatic force with different sizes through an electric field according to different particle electric conductivities, is suitable for low-speed particles, and has the defects of low crude oil dehydration rate, high energy consumption and the like. Therefore, the problems of low separation speed, large occupied area, low separation precision and the like exist in the existing oil-gas-water separation.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the oil-gas-water separation device which is high in oil-gas-water separation speed, high in separation precision and small in occupied space.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
an oil-gas-water separation device comprises a primary separation component for carrying out primary separation of oil, gas and water on produced liquid, a secondary oil removal component for carrying out emulsion breaking and separation on primary separated oily sewage, a secondary water removal component for carrying out emulsion breaking and separation on primary separated oily crude oil, and an exhaust component for exhausting primary separated gas, wherein the primary separation component comprises a cyclone cavity and a cyclone separator arranged in the cyclone cavity, and the secondary oil removal component is positioned below the secondary water removal component and is communicated with the cyclone cavity; the exhaust assembly is communicated with the top end of the rotational flow cavity.
As a further improvement of the above technical solution:
the secondary oil removal assembly and the secondary water removal assembly both comprise a bionic super-wetting film component, the bionic super-wetting film component comprises a roller and super-wetting films with different separation characteristics, and each super-wetting film comprises a wetting film body covering the surface of the roller and a plurality of arc-shaped blades arranged along the circumferential direction of the wetting film body; the roller is provided with a through part for the liquid treated by the super-wetting film to flow into the roller and an inclined water outlet hole for the liquid in the roller to flow out and generate a rotational flow.
The bionic super-wetting membrane components of the secondary oil removal assembly are four groups, the super-wetting membranes of the four groups of bionic super-wetting membrane components are respectively an emulsion breaking membrane, a first hydrophilic oleophobic membrane, a heavy metal removal membrane and a desalting membrane which are sequentially arranged along the conveying direction of the oily sewage, and the mesh number of the super-wetting membranes is sequentially increased along the conveying direction of the oily sewage; the bionic super-infiltration membrane components of the secondary dewatering component are divided into two groups, the super-infiltration membranes of the two groups of bionic super-infiltration membrane components are respectively a demulsification membrane and a first oleophylic hydrophobic membrane which are sequentially arranged along the conveying direction of the water-containing crude oil, and the mesh number of the first oleophylic hydrophobic membrane is higher than that of the demulsification membrane.
The oil extraction assembly comprises an oil extraction pipeline and a second oleophylic hydrophobic membrane, the oil extraction pipeline is arranged on the secondary oil removal assembly and is positioned above a bionic super-wetting membrane part provided with a demulsification membrane and a first hydrophilic oleophobic membrane, and the second oleophylic hydrophobic membrane is arranged in the oil extraction pipeline; the drainage assembly comprises a drainage pipeline and a second hydrophilic oleophobic membrane, the drainage pipeline is arranged on the secondary dewatering assembly and is positioned below the two groups of bionic super-wetting membrane components, and the second hydrophilic oleophobic membrane is arranged in the drainage pipeline; the waste residue collector is arranged below each bionic super-infiltration membrane component.
The secondary oil removal assembly and the secondary water removal assembly further comprise a liquid inlet channel, a separation channel and a liquid outlet channel which are sequentially communicated, the diameter of the liquid inlet channel is smaller than that of the separation channel, and the liquid inlet channel is communicated with the separation channel through a conical cyclone section; the bionic super-infiltration membrane part is arranged in the separation channel.
The secondary oil removal assembly also comprises a water quality detection part for ensuring that the water quality reaches the emission standard, the water quality detection part comprises a water quality detector, a backflow pipeline, a three-way valve and a one-way valve, and the water quality detector is arranged on a liquid outlet channel of the secondary oil removal assembly; one end of the return pipeline is positioned at the downstream of the water quality detector, and the other end of the return pipeline is positioned at the upstream of the bionic super-infiltration membrane component; the three-way valve is arranged at the communication position of the backflow pipeline and the liquid outlet channel; the check valve is arranged in the return pipeline.
The device also comprises a controller, a liquid level detection piece for detecting the liquid level in the cyclone cavity, a gas regulating valve arranged on the exhaust assembly, a water outlet regulating valve arranged at the liquid inlet end of the secondary oil removal assembly, and an oil outlet regulating valve arranged at the liquid inlet end of the secondary water removal assembly; the input end of the controller is connected with the liquid level detection piece, and the output end of the controller is connected with the gas regulating valve, the water outlet regulating valve and the oil outlet regulating valve; and the controller controls the opening of the gas regulating valve, the water outlet regulating valve and the oil outlet regulating valve according to the liquid level detection value of the liquid level detection piece.
The liquid inlet ends of the secondary oil removal assembly and the secondary water removal assembly are respectively provided with a pressure sensor for detecting input pressure; the bottom end of the rotational flow cavity is communicated with a bypass pipe, and a bypass valve is arranged on the bypass pipe; the input end of the controller is connected with the pressure sensor, and the output end of the controller is connected with the bypass valve; when the pressure sensor detects that the pressure rises rapidly, the controller controls the bypass valve to be opened and controls the water outlet regulating valve and the oil outlet regulating valve to be closed.
The cyclone separator is a vane type swirler, vanes of the vane type swirler are spirally arranged, and the included angle between the tangential direction of a vane spiral line and a vane shaft is 15-75 degrees.
The bottom of the primary separation component is provided with a U-shaped input pipe for inputting the produced fluid to the cyclone cavity, an impurity removal component for removing solid-phase impurities of the produced fluid and a demulsification pore plate for performing primary oil-water separation on the produced fluid, wherein the U-shaped input pipe is communicated with the bottom of the primary separation component; the impurity removing assembly comprises a carbon dioxide feeding port, a waste residue collecting piece and a filter screen which are sequentially arranged along the liquid inlet direction to the liquid outlet direction of the U-shaped input pipe; the demulsification pore plate is arranged between the output end of the U-shaped input pipe and the rotational flow cavity.
Compared with the prior art, the invention has the advantages that:
the oil-gas-water separation device comprises a primary separation assembly, a secondary oil removal assembly, a secondary water removal assembly and an exhaust assembly, wherein the primary separation assembly comprises a cyclone cavity and a cyclone separator, the cyclone separator is arranged in the cyclone cavity and performs primary oil-gas-water separation on produced liquid under the cyclone action, then the secondary oil removal assembly is adopted to perform emulsion breaking and separation on primary separated oily sewage, the secondary water removal assembly is adopted to perform emulsion breaking and separation on primary separated aqueous crude oil, and the exhaust assembly is adopted to discharge primary separated gas, so that secondary fine separation of an oil-water mixture is realized, the oil-gas-water separation speed is high, and the separation precision is high. Meanwhile, according to the density difference of oil, gas and water, the secondary oil removal assembly is arranged below the secondary water removal assembly, and the exhaust assembly is arranged at the top end of the rotational flow cavity, so that the filtering effect of the oil, gas and water is ensured, the layout structure is simple and compact, and the occupied space is small.
The secondary oil removal assembly and the secondary water removal assembly further comprise a bionic super-wetting membrane component, the bionic super-wetting membrane component comprises a roller and super-wetting membranes with different separation characteristics, and the super-wetting membranes have the characteristics of demulsification, hydrophilic oleophobic property, oleophilic hydrophobic property and the like, so that secondary fine separation of an oil-water mixture is further realized. The super-infiltration membrane comprises an infiltration membrane body and a plurality of arc-shaped blades, the infiltration membrane body covers the surface of the roller, the arc-shaped blades are arranged along the circumferential direction of the infiltration membrane body, the contact area of the super-infiltration membrane and incoming liquid is greatly increased due to the arrangement of the arc-shaped blades, the filtering effect is further improved, the roller is driven to rotate after the incoming liquid is contacted with the super-infiltration membrane, the incoming liquid forms lateral washing on solid-phase particle impurities retained on the super-infiltration membrane, the smoothness of the
Drawings
The invention will be described in more detail hereinafter on the basis of embodiments and with reference to the accompanying drawings. Wherein:
FIG. 1 is a schematic view of the structure of an oil-gas-water separation apparatus of the present invention.
FIG. 2 is a schematic perspective view of a biomimetic super-wetting membrane part according to the present invention.
FIG. 3 is another schematic perspective view of a biomimetic super-wetting membrane part according to the present invention.
Fig. 4 is a perspective view of the drum according to the present invention.
The reference numerals in the figures denote:
1. a primary separation assembly; 11. a rotational flow cavity; 12. a cyclone separator; 13. a liquid level detection member; 14. a bypass pipe; 15. a bypass valve; 16. a U-shaped input tube; 17. an impurity removal assembly; 171. a carbon dioxide feed port; 172. a waste residue collection member; 173. a filter screen; 18. demulsifying the orifice plate; 2. a secondary oil removal assembly; 21. a water quality detection part; 211. a water quality detector; 212. a return line; 213. a three-way valve; 214. a one-way valve; 22. a water outlet regulating valve; 3. a secondary dewatering assembly; 31. an oil outlet regulating valve; 4. an exhaust assembly; 41. a gas regulating valve; 42. a top exhaust pipe; 43. a gas pressure detecting member; 5. a biomimetic super-infiltrated membrane component; 51. a drum; 511. a through part; 512. inclining the water outlet hole; 52. super-wetting the film; 521. infiltrating the membrane body; 522. an arc-shaped blade; 523. breaking the mammary membrane; 524. a first hydrophilic oleophobic membrane; 525. removing the heavy metal film; 526. a desalting membrane; 527. a first lipophilic hydrophobic membrane; 53. a bearing; 6. an oil discharge assembly; 61. an oil discharge pipe; 62. a second lipophilic hydrophobic membrane; 7. a drainage assembly; 71. a water discharge pipeline; 72. a second hydrophilic oleophobic membrane; 8. a waste residue collector; 9. an oil-water filtering channel; 91. a liquid inlet channel; 92. a separation channel; 93. a liquid outlet channel; 94. a conical swirling flow section; 10. a liquid pressure detecting member; 101. a first pressure sensor; 102. a second pressure sensor.
Detailed Description
The invention will be described in further detail with reference to the drawings and specific examples, without thereby limiting the scope of the invention.
Fig. 1 shows an embodiment of the oil-gas-water separation device of the present invention, which is suitable for use in onshore oil fields and offshore oil fields. The oil-gas-water separation device comprises a primary separation component 1, a secondary oil removal component 2, a secondary
The oil-gas-water separation device disclosed by the invention adopts the rotational flow generated by the
As shown in fig. 2 to 4, the secondary oil removing assembly 2 and the secondary
In this embodiment, the
Meanwhile, the
As shown in fig. 1, the bionic
Furthermore, the mesh numbers of the
In this embodiment, the bionic
As shown in fig. 1, the oil-gas-water separation device further comprises an oil discharge assembly 6, a water discharge assembly 7 and a
Further, the secondary deoiling subassembly 2 and the
Further, secondary deoiling subassembly 2 still includes the water
As shown in fig. 1, the oil-gas-water separation device of the present embodiment further includes a controller, a
When the
Further, the
When the
Further, a
As shown in FIG. 1, the
In this embodiment, the bottom of the primary separation assembly 1 is provided with a
In this embodiment, the
The oil-gas-water separation device disclosed by the invention separates oil, gas and water by adopting a cyclone and super-infiltration composite principle. Firstly, removing solid-phase impurities in the oil water by adopting an impurity removing assembly 17 in a
While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
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