Oil-water intermediate layer oil-water separation device

Abstract

The application relates to the technical field of oil-water separation devices, in particular to an oil-water intermediate layer oil-water separation device which comprises a device body and an exhaust valve, a liquid inlet pipe and a water outlet pipe are arranged on the device body, a cavity is arranged in the device body, a filter screen for filtering flocculation is arranged in the cavity, the filter screen divides the cavity into a demulsification flocculation cavity and an oil-water separation cavity, the water outlet pipe is communicated with the oil-water separation cavity, a partition plate is arranged in the demulsification flocculation cavity, when the device is used, a PTFE microporous membrane is arranged in the lower cavity, the PTFE microporous membrane can pass gas but cannot pass liquid, air in the flocculation existing in the lower cavity enters an exhaust cavity, and then the air in the exhaust cavity is exhausted out of the device body through the exhaust valve, the space for the flocculation link is increased, the oil-water separation efficiency is improved, the problems of the physical influence factors of the oil-water separation of the existing device and the different shapes of the oil-water separation membranes affecting the oil-water separation efficiency are avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil-water separation devices, in particular to an oil-water intermediate layer oil-water separation device. BACKGROUND

[0002] The oil-water intermediate layer of an oil field is a very stable viscous colloid material formed at the oil-water interface, with high viscosity, high water content and high oil content. When oil and water are mixed, emulsification occurs easily, resulting in a blurred two-phase interface between the organic phase and the water contact surface. The oil-water intermediate layer is one of the problems of separating the oil-water interface, which not only reduces the oil-water separation speed, but also seriously affects the oil removal and filtration effect of the sewage. The existing static stratification treatment of oil-water two-phase treatment has high cost and serious raw material waste. The existing oil-water separation device does not comprehensively consider the physical factors when separating, so the oil-water separation efficiency cannot achieve the ideal effect.

[0003] Most of the existing oil-water separation devices are researched in the flocculation filtration link, but the influence factors of filtration temperature and filtration pressure in the oil-water separation link are not considered. For the oil-water intermediate layer, in addition to considering the composition and properties of the oil-water intermediate layer, the influence of filtration temperature and filtration pressure on the overall separation effect is also considered.

[0004] The device for separating and filtering oily wastewater with application number 202310075848.X uses aggregation-induced demulsification particles and ceramic particles in the demulsification cavity to demulsify the wastewater, a stirring device is arranged in the reaction cavity to accelerate flocculation, and finally an oil-water separation is performed in the filtration cavity. However, this method does not involve the influence of external physical properties on the demulsification and flocculation process, and the separation efficiency needs to be improved. The device cannot achieve the most ideal separation effect.

[0005] The oil absorption film arranged in the filtration cavity is an ideal film material for treating oil-water separation, which can be most modified oil-water separation film materials or tubular carbon membranes. In most cases, the carbon membrane is arranged in a flat plate, which greatly weakens the advantages. Research shows that tubular carbon membranes have higher water flux and oil product retention rate, and exhibit excellent oily wastewater purification treatment performance. The oil absorption material inside the three oil-water separation cavities can be changed according to the progress of the newly invented material, and this part is not uniquely determined.

[0006] Therefore, in view of the above, in order to improve the oil-water separation efficiency of the oil-water intermediate layer, a new oil-water separation device is proposed. SUMMARY

[0007] The technical problem to be solved by the present application is that the existing device has the problems of insufficient physical influence factors for oil-water separation, and different oil-water separation film shapes affect the oil-water separation efficiency. Therefore, the present application provides an oil-water intermediate layer oil-water separation device.

[0008] The technical scheme adopted by the present application to solve its technical problems is: an oil-water intermediate layer oil-water separation device, comprising a device body and an exhaust valve, the device body is provided with a liquid inlet pipe and a drain pipe, the device body is provided with a cavity, the cavity is provided with a filter screen for filtering flocculation, the filter screen separates the cavity into a demulsification flocculation cavity and an oil-water separation cavity, the drain pipe is communicated with the oil-water separation cavity, the demulsification flocculation cavity is provided with a partition plate, the partition plate separates the demulsification flocculation cavity into an upper cavity and a lower cavity, the partition plate is provided with a through hole, the through hole communicates the upper cavity and the lower cavity, the liquid inlet pipe is communicated with the upper cavity of the demulsification flocculation cavity, the upper cavity is filled with polystyrene particles, the diameter of the through hole is smaller than the diameter of the polystyrene particles, a filter membrane is arranged between the polystyrene particles and the partition plate, the filter membrane is used for isolating demulsification and flocculation, and the filter membrane is an ultra-hydrophobic calcium carbonate particle membrane.

[0009] The device body located at the lower cavity comprises an outer shell and an inner shell, and a gap is formed between the outer shell and the inner shell, a PTFE microporous membrane is arranged between the outer shell and the inner shell, the PTFE microporous membrane is located between the lower cavity and an exhaust cavity, the exhaust valve is communicated with the exhaust cavity and located outside the device body, and the exhaust cavity is formed between the outer shell, the inner shell, the PTFE microporous membrane and the exhaust valve. Compared with the prior art, the PTFE microporous membrane can pass gas but not liquid, the air in the flocculation existing in the lower cavity enters the exhaust cavity, and then the gas in the exhaust cavity is discharged out of the device body through the exhaust valve, so that the flocculation link is increased, and the efficiency of oil-water separation is improved.

[0010] In some preferred embodiments, the inner shell has elastic deformation ability, a plurality of springs are arranged between the outer shell and the inner shell, and the springs are electrically connected with the outside and control the expansion and contraction of the springs.

[0011] In some preferred embodiments, the spring coefficients of the plurality of springs gradually decrease along the direction from the PTFE microporous membrane to the exhaust valve.

[0012] In some preferred embodiments, an adding pipe communicated with the lower cavity is arranged outside the device body, and the adding pipe is used for adding a flocculating agent into the lower cavity.

[0013] In some preferred embodiments, an electrode plate for vibration is arranged in the lower cavity, and the electrode plate is arranged at the adding pipe.

[0014] In some preferred embodiments, the adding pipe has a curved section and a straight section communicated in sequence, the curved section is used for preventing overflow of flocculation liquid when the electrode plate vibrates, the curved section is located outside the device body, the straight section is arranged on the device body and communicated with the lower cavity, and a cover plate for covering a pipe opening is arranged on the curved section.

[0015] In some preferred embodiments, the inner circumferential wall of the upper cavity is provided with a heating cable layer for heating.

[0016] In some preferred embodiments, the device further comprises a temperature control device electrically connected to the heating cable layer and used for controlling the heating temperature thereof.

[0017] In some preferred embodiments, the oil-water separation cavity comprises a first cavity and a plurality of second cavities, the first cavity is located between the second cavities and the lower cavity, the second cavities are provided with oil absorption membranes, one end of the second cavities is in communication with the first cavity, and the other end of the second cavities is in communication with the drain pipe.

[0018] In some preferred embodiments, the device body comprises a lower pipe body, the outer shell body is detachably connected to the lower pipe body, and the filter membrane is arranged between the outer shell body and the lower pipe body.

[0019] The oil-water separation device has the following advantages: when the oil-water separation device is used, the PTFE microporous membrane is arranged in the lower cavity, the PTFE microporous membrane can pass gas but not liquid, air in the flocculation existing in the middle of the lower cavity enters the exhaust cavity, and then the gas in the exhaust cavity is discharged out of the device body through the exhaust valve, so that the flocculation link is increased, the oil-water separation efficiency is improved, the deficiencies of the physical factors affecting the oil-water separation of the prior art device are avoided, and the problem of different oil-water separation membrane shapes affecting the oil-water separation efficiency is solved. BRIEF DESCRIPTION OF DRAWINGS

[0020] The application will be further described below in combination with the drawings and examples.

[0021] Figure 1 is a structural schematic diagram of the application;

[0022] Figure 2 is Figure 1 is a partial enlarged view of A in FIG. 1;

[0023] Figure 3 is Figure 1 is a partial enlarged view of B in FIG. 1.

[0024] In the drawings: 1, device body, 2, exhaust valve, 3, liquid inlet pipe, 4, drain pipe, 5, cavity body, 6, filter screen, 7, demulsification flocculation cavity, 8, oil-water separation cavity, 9, partition plate, 10, upper cavity, 11, lower cavity, 12, polystyrene particles, 13, filter membrane, 14, outer shell body, 15, inner shell body, 16, PTFE microporous membrane, 17, exhaust cavity, 18, spring, 19, addition pipe, 20, electrode plate, 21, heating cable layer, 22, temperature control device, 23, first cavity, 24, second cavity, 25, oil absorption membrane. DETAILED DESCRIPTION

[0025] The application is further described below in conjunction with the embodiments:

[0026] The application is not limited to the following specific embodiments, and those skilled in the art can implement the application in other various specific embodiments according to the disclosure of the application, or any simple changes or modifications made by using the design structure and ideas of the application, all fall within the protection scope of the application. It should be noted that the embodiments in the application and the features in the embodiments can be combined with each other without conflict.

[0027] In the description of the application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application. In addition, the terms "first", "second" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0028] In the description of the application, it should be noted that unless otherwise specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication between the two elements inside. For those skilled in the art, the specific meaning of the above terms in the application can be understood through specific circumstances.

[0029] As Figures 1-3As shown, an oil-water intermediate layer oil-water separation device includes a device body 1 and an exhaust valve 2, the device body 1 is provided with a liquid inlet pipe 3 and a water outlet pipe 4, the device body 1 is provided with a cavity body 5, the cavity body 5 is provided with a filter screen 6, the filter screen 6 is used for filtering flocculation, the filter screen 6 separates the cavity body 5 into a demulsification flocculation cavity 7 and an oil-water separation cavity 8, the water outlet pipe 4 is communicated with the oil-water separation cavity 8, the demulsification flocculation cavity 7 is provided with a partition plate 9, the partition plate 9 separates the demulsification flocculation cavity 7 into an upper cavity 10 and a lower cavity 11, the partition plate 9 is provided with a through hole, the through hole communicates the upper cavity 10 and the lower cavity 11, the liquid inlet pipe 3 is communicated with the upper cavity 10 of the demulsification flocculation cavity 7, the upper cavity 10 is filled with polystyrene particles 12, the diameter of the through hole is smaller than the diameter of the polystyrene particles 12, the polystyrene particles 12 and the partition plate 9 are provided with a filter membrane 13, the filter membrane 13 is used for isolating demulsification and flocculation, the filter membrane 13 is a super-hydrophobic calcium carbonate particle membrane, the super-hydrophobic calcium carbonate particle membrane can be suitable for oil-water separation with large viscosity, through experiments, it is found that the effect of monomer or membrane material is poor compared with particles and powders, so the granular calcium carbonate is used to preliminarily filter the large oil droplets formed by the polystyrene particles 12;

[0030] The device body 1 located at the lower cavity 11 includes an outer shell 14 and an inner shell 15, the outer shell 14 and the inner shell 15 have a gap, the outer shell 14 and the inner shell 15 are provided with a PTFE microporous membrane 16, the PTFE microporous membrane 16 is located between the lower cavity 11 and an exhaust cavity 17, the exhaust valve 2 is communicated with the exhaust cavity 17 and located outside the device body 1, the outer shell 14, the inner shell 15, the PTFE microporous membrane 16 and the exhaust valve 2 form the exhaust cavity 17, the pore size of the PTFE microporous membrane 16 which cannot let water pass is about 70 nanometers, so the material which can pass gas but not liquid needs the property, not only the pore size, but also the hydrophobicity, so the PTFE microporous membrane 16 has good hydrophobicity, the PTFE microporous membrane 16 is a light, thin, strong and durable film, which has the functions of waterproof, breathable and windproof.

[0031] In order to better control the flocculation space of the lower cavity 11, the inner shell 15 has elastic deformation ability, a plurality of springs 18 are arranged between the outer shell 14 and the inner shell 15, the springs 18 are electrically connected with the outside and control the extension and contraction of the springs 18, a separation net is arranged in the lower cavity 11 at the PTFE microporous membrane 16.

[0032] The coefficient of the springs 18 gradually decreases along the PTFE microporous membrane 16 to the exhaust valve 2.

[0033] In order to facilitate the addition of flocculating agent in the lower cavity 11, an adding pipe 19 is arranged outside the device body 1, the adding pipe 19 is communicated with the lower cavity 11, so as to realize the addition of flocculating agent in the lower cavity 11 through the adding pipe 19.

[0034] The electrode plate 20 for vibration is arranged in the lower cavity 11, the electrode plate 20 vibrates and emits flocculating agent, the electrode plate 20 is arranged at the adding pipe 19, and the flocculating agent after emission is mixed with the small particle oil-water mixture after demulsification to flocculate.

[0035] In order to prevent the overflow of flocculating liquid when the electrode plate 20 vibrates, the adding pipe 19 has a curved section and a straight section which are communicated in sequence, the curved section is used to prevent the overflow of flocculating liquid when the electrode plate 20 vibrates, the curved section is located outside the device body 1, the straight section is arranged on the device body 1 and communicated with the lower cavity 11, the design of the curved pipe not only can replenish the flocculating agent at any time but also can prevent the overflow of flocculating liquid when the electrode plate 20 vibrates well.

[0036] In order to prevent the introduction of other impurities after the addition of flocculating agent is completed and the backflow of substances through the adding pipe 19, the curved section is provided with a cover plate for covering the pipe opening.

[0037] The inner circumferential wall of the upper cavity 10 is provided with a heating cable layer 21 for heating.

[0038] Further comprising a temperature control device 22, the temperature control device 22 is electrically connected with the heating cable layer 21 and is used to control the heating temperature thereof.

[0039] The oil-water separation cavity 8 comprises a first cavity 23 and a second cavity 24, the first cavity 23 is located between the second cavity 24 and the lower cavity 11, the second cavity 24 is provided with a plurality of, one end of the second cavity 24 is communicated with the first cavity 23, the other end of the second cavity 24 is communicated with the drain pipe 4, a plurality of the second cavities 24 are parallel to each other, and a plurality of the second cavities 24 are provided with an oil absorption film 25.

[0040] The device body 1 comprises a lower pipe body, the outer shell 14 is detachably connected with the lower pipe body, and the filter membrane 13 is arranged between the outer shell 14 and the lower pipe body.

[0041] The principle of the oil-water separation device is that oil and water enter the upper cavity 10 of the demulsification flocculation cavity 7 through the liquid inlet pipe 3, the oil and water contact the polystyrene particles 12 in the upper cavity 10, the polystyrene particles 12 can increase the probability of collision between oil droplets, thereby making small oil droplets gather and form large oil droplets, preliminarily destroying the stability of the emulsion system, and making the emulsion preliminarily separate, then the large oil droplets are preliminarily filtered through the filter membrane 13, the small oil-water mixture enters the lower cavity 11, the electrode plate 20 vibrates and disperses the flocculating agent and flocculates the small oil-water mixture after demulsification, the PTFE microporous membrane 16 prevents other liquid mixtures except gas from entering the exhaust cavity 17, then the spring 18 is energized according to the situation, when the spring 18 is elongated, the inner shell 15 is deformed inward and extrudes the medium in the lower cavity 11, the gas in the lower cavity 11 passes through the PTFE microporous membrane 16 and enters the exhaust cavity 17, the exhaust valve 2 is screwed upward to open and discharge the gas in the exhaust cavity 17, in this way, the current is controlled to control the contraction of the lower cavity 11 to continuously discharge the gas, the flocculation in the middle still has space for the flocculation link, and the medium is extruded and rapidly separated when the lower cavity 11 is contracted, thereby improving the separation efficiency, then the flocculation formed by the lower cavity 11 is filtered through the filter screen 6, the filtered water enters the first cavity 23, then passes through the three parallel second cavities 24, and the residual oil and water in the water are absorbed by the oil absorption film 25, finally the water is collected to the drain pipe 4 for discharge.

[0042] The above is the ideal embodiment according to the present application, through the above description, relevant personnel 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 in the specification, and must be determined according to the scope of claims.

Claims

1. An oil-water intermediate layer oil-water separation device, characterized in that: The device includes a main body (1) and an exhaust valve (2). The main body (1) is equipped with an inlet pipe (3) and a drain pipe (4). The main body (1) contains a cavity (5). The cavity (5) contains a filter screen (6) for filtering flocculants. The filter screen (6) divides the cavity (5) into a demulsification and flocculation chamber (7) and an oil-water separation chamber (8). The drain pipe (4) is connected to the oil-water separation chamber (8). The demulsification and flocculation chamber (7) contains a partition (9). The partition (9) divides the demulsification and flocculation chamber (7) into an upper chamber (10). The upper cavity (10) and the lower cavity (11) are connected by a through hole on the partition plate (9). The liquid inlet pipe (3) is connected to the upper cavity (10) of the demulsification and flocculation chamber (7). The upper cavity (10) is filled with polystyrene particles (12). The diameter of the through hole is smaller than the diameter of the polystyrene particles (12). A filter membrane (13) is provided between the polystyrene particles (12) and the partition plate (9). The filter membrane (13) is used to isolate demulsification and flocculation. The filter membrane (13) is a superhydrophobic calcium carbonate particle membrane. The device body (1) located in the lower cavity (11) includes an outer shell (14) and an inner shell (15), with a gap between the outer shell (14) and the inner shell (15), and a PTFE microporous membrane (16) disposed between the outer shell (14) and the inner shell (15). An exhaust chamber (17) is formed between the outer shell (14), the inner shell (15), the PTFE microporous membrane (16), and the exhaust valve (2), with the PTFE microporous membrane (16) located between the lower cavity (11) and the exhaust chamber (17). The exhaust valve (2) communicates with the exhaust chamber (17) and is located outside the device body (1). The inner shell (15) has elastic deformation capability. A plurality of springs (18) are provided between the outer shell (14) and the inner shell (15). The springs (18) are electrically connected to the outside and control the extension and retraction of the springs (18).

2. The oil-water intermediate layer oil-water separation device according to claim 1, characterized in that: The spring coefficient of several springs (18) gradually decreases along the PTFE microporous membrane (16) toward the exhaust valve (2).

3. The oil-water intermediate layer oil-water separation device according to claim 1, characterized in that: The device body (1) is provided with an addition pipe (19) that communicates with the lower cavity (11). The addition pipe (19) is used to add flocculant into the lower cavity (11).

4. The oil-water intermediate layer oil-water separation device according to claim 3, characterized in that: The lower cavity (11) is provided with an electrode plate (20) for vibration, and the electrode plate (20) is located at the addition tube (19).

5. The oil-water intermediate layer oil-water separation device according to claim 4, characterized in that: The adding tube (19) has a curved section and a straight section connected in sequence. The curved section is used to prevent the flocculant from overflowing when the electrode plate (20) vibrates. The curved section is located outside the device body (1). The straight section is set on the device body (1) and connected to the lower cavity (11). A cover plate for covering the tube opening is provided on the curved section.

6. The oil-water intermediate layer oil-water separation device according to claim 1, characterized in that: The inner peripheral wall of the upper cavity (10) is provided with a heating cable layer (21) for heating.

7. The oil-water intermediate layer oil-water separation device according to claim 6, characterized in that: It also includes a temperature control device (22), which is electrically connected to the heat cable layer (21) and used to control its heating temperature.

8. The oil-water intermediate layer oil-water separation device according to claim 1, characterized in that: The oil-water separation chamber (8) includes a first chamber (23) and a second chamber (24). The first chamber (23) is located between the second chamber (24) and the lower chamber (11). The second chamber (24) is provided with a plurality of chambers. One end of the second chamber (24) is connected to the first chamber (23), and the other end of the second chamber (24) is connected to the drain pipe (4). The plurality of second chambers (24) are connected in parallel with each other, and each of the plurality of second chambers (24) is provided with an oil-absorbing film (25).

9. The oil-water intermediate layer oil-water separation device according to claim 1, characterized in that: The device body (1) includes a lower tube body, the outer shell (14) is detachably connected to the lower tube body, and the filter membrane (13) is disposed between the outer shell (14) and the lower tube body.

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