Double-super-cyclone air flotation coalescence system

Abstract

The utility model relates to the technical field of water-oil separation, in particular to a double-super-cyclone air flotation coalescence system which comprises a primary coalescence filtering device and a precise coalescence filtering device which are communicated with each other, the primary coalescence filtering device comprises a first tank body and a first filter element, the outer surface of the first filter element is coated with a functional coating, a liquid inlet pipe is arranged on the outer wall of the first tank body in a penetrating manner, and the upper end of the first filter element is connected with a transfer pipe; the precise coalescence filtering device comprises a second tank body and a second filter element, the surface of the second filter element is coated with a functional coating, the transfer pipe penetrates through the first tank body and enters the second tank body, the second filter element is connected with a refined filtration liquid outlet pipe, and the refined filtration liquid outlet pipe is connected with a second tank body. One end, far away from the end connected with the second filter element, of the fine filtration liquid outlet pipe penetrates through the second tank body and is used for outputting fine filtration liquid. The oil-water separation device has the advantages that the problem of low oil-water separation efficiency is solved, and oil-water separation is more thorough.

Description

Technical Field

[0001] This application relates to the technical field of water-oil separation, and in particular to a dual-super-cyclone air flotation coalescence system. Background Technology

[0002] Water is inevitably produced during the oilfield extraction process. In order to prevent water from affecting the quality of crude oil, it is necessary to remove the water in a timely manner.

[0003] In related technologies, water is usually extracted directly from the oil field, filtered, and then discharged.

[0004] Regarding the aforementioned technologies, conventional water-oil separation is inefficient and not thorough enough, so some crude oil remains in the discharged water, causing environmental impact. Utility Model Content

[0005] To improve the problem of low water-oil separation efficiency and make water-oil separation more thorough, this application provides a dual super-cyclone air flotation coalescence system.

[0006] The dual-super-cyclone air flotation coalescing system provided in this application adopts the following technical solution:

[0007] A dual-super swirling air flotation coalescing system includes a preliminary coalescing filter device and a precision coalescing filter device that are interconnected.

[0008] The preliminary coalescence filtration device includes a first tank and a first filter element disposed in the first tank. The outer surface of the first filter element is coated with a functional coating. The first tank has an inlet pipe through its outer wall for inputting the raw liquid to be filtered. The inlet pipe is arranged along the tangential direction of the first tank. The upper end of the first filter element is connected to a transfer pipe.

[0009] The precision coalescing filtration device includes a second tank and a second filter element disposed in the second tank. The filtration accuracy of the second filter element is greater than that of the first filter element. The surface of the second filter element is coated with a functional coating. The end of the transfer tube away from the first filter element passes through the first tank and enters the second tank. The end of the transfer tube away from the first tank is arranged along the tangential direction of the second tank. The second filter element is connected to a fine filtrate outlet pipe. The end of the fine filtrate outlet pipe away from the second filter element passes through the second tank for outputting the precision filtrate.

[0010] One-way valves are provided on the inlet pipe, the transfer pipe, and the fine filtration outlet pipe.

[0011] By adopting the above technical solution, the raw liquid to be filtered enters the first tank through the inlet pipe and undergoes coarse filtration through the first filter element. The coarsely filtered filtrate then enters the second tank through the transfer pipe and undergoes fine filtration through the second filter element. The finely filtered filtrate is then discharged from the filtration system through the fine filtration outlet pipe. The interconnected preliminary coalescing filtration device and the fine coalescing filtration device achieve two-stage filtration of crude oil and water. The first and second filter elements, with their different filtration precisions and functional coatings (either hydrophilic-oleophobic or oleophilic-hydrophobic coatings), help to completely separate crude oil from water. The two-stage filtration mechanism improves separation efficiency more than a single filtration step. Both the inlet pipe and the transfer pipe are set tangentially to the tank, utilizing the swirling effect of the liquid to form eddies within the tank, enhancing the mixing and separation of the liquid. This not only improves filtration efficiency but also helps to remove droplets coalescing on the filter element surface, reducing clogging and deposition problems. One-way valves are installed on the inlet pipe, transfer pipe, and fine filter outlet pipe to ensure that the liquid can only flow in the predetermined direction, avoiding backflow and cross-contamination, and improving the reliability and safety of the system.

[0012] Furthermore, a coarse filtrate outlet pipe is connected to the transfer pipe located inside the first tank. The end of the coarse filtrate outlet pipe that is away from the transfer pipe passes through the first tank for outputting preliminary filtrate. A one-way valve body is provided on the coarse filtrate outlet pipe.

[0013] By adopting the above technical solution, when the oil content in the raw liquid to be filtered is low, water-oil separation can be achieved through preliminary filtration, eliminating the need for further fine filtration before direct output. The coarse filtration outlet pipe allows the preliminary filtrate obtained from coarse filtration to be directly output from the system, improving the filtration effect.

[0014] Furthermore, the first tank has a first oil drain pipe at its upper center position and a first drain pipe on its side wall. The second tank has a second oil drain pipe at its upper center position and a second drain pipe on its side wall. A main discharge pipe for connecting the first oil drain pipe, the first drain pipe, the second oil drain pipe, and the second drain pipe is provided on one side of both the first tank and the second tank. One-way valves are provided on the first oil drain pipe, the first drain pipe, the second oil drain pipe, and the second drain pipe.

[0015] By adopting the above technical solution, oil drain pipes are respectively installed at the center of the top of the first and second tanks. Under the swirling liquid state inside the tanks, the oil layer accumulating at the top of the tanks can be effectively collected, thereby improving oil purity. Similarly, drain pipes installed on the side walls of the tanks help drain accumulated water at the bottom of the tanks, reducing water contamination of the oil. The separate installation of oil drain pipes and drain pipes allows oil and water to be collected and treated separately, which helps avoid oil-water mixing and thus improves separation efficiency. The main discharge pipe provides a centralized fluid outlet, facilitating unified management and discharge of the separated oil and water. One-way valves are installed on each pipe to ensure unidirectional fluid flow in the pipelines, preventing backflow and potential contamination, as well as preventing equipment damage or safety accidents caused by fluid backflow, thus improving the reliability and stability of the system.

[0016] Furthermore, the first filter element includes an upper connecting part, a main frame and a lower connecting part arranged coaxially. The upper connecting part and the lower connecting part are respectively fixedly connected to the upper and lower ends of the main frame. The outer wall of the main frame is circumferentially provided with a plurality of filter membranes arranged in parallel along the length direction. The functional coating is applied to the outside of each of the filter membranes.

[0017] The upper connecting part is used to connect the transfer tube and the coarse filtrate outlet tube, and the lower connecting part is fixedly connected to the lower inner wall of the first tank.

[0018] By adopting the above technical solution, the upper and lower connecting parts are fixedly connected to the upper and lower ends of the main frame, respectively, enhancing the overall structural stability of the filter element and ensuring reliable connection between the filter element and components such as the first tank and transfer pipe. The upper connecting part is used to connect the transfer pipe and the coarse filtrate outlet pipe, making it easy to integrate the filter element with other parts of the filtration system and ensuring smooth fluid flow. Several filter membranes are arranged in parallel along the circumferential direction on the outer wall of the main frame. This parallel arrangement increases the surface area of ​​the filter membranes, thereby increasing the contact probability between the filtrate and the filter membranes and improving the filtration effect.

[0019] Furthermore, there are multiple first filter elements, and the first tank is provided with a first transfer pipe for connecting the transfer pipe and the coarse filtrate outlet pipe to each of the upper connecting parts.

[0020] The first adapter pipe includes a first main adapter pipe for connecting to the transfer pipe and the coarse filtrate outlet pipe, and a plurality of first branch adapter pipes for correspondingly connecting to each of the upper connecting parts. The ends of each first branch adapter pipe away from each of the upper connecting parts are connected to the first main adapter pipe, and the transfer pipe and the coarse filtrate outlet pipe are both connected to the first main adapter pipe.

[0021] By adopting the above technical solution, the simultaneous use of multiple first filter elements can significantly increase the filtration area, thereby increasing the amount of water processed per unit time. The parallel operation of multiple filter elements also helps to distribute the filtration load and extend the service life of individual filter elements. Through the integrated design of the first transfer pipe, the transfer pipe and the coarse filtrate outlet pipe are connected to multiple filter elements, simplifying the overall structure of the system.

[0022] Furthermore, the second filter element includes a filter box and an upper connector fixedly connected to the upper end of the filter box. The functional coating is applied to the outside of the filter box, and the fine filtration outlet pipe is fixedly connected to the upper connector.

[0023] By adopting the above technical solution, the filter box, as the main body of the second filter element, combined with its external functional coating (which can be either a hydrophilic-oleophobic coating or an oleophilic-hydrophobic coating), allows for filtrate permeation while efficiently trapping tiny impurity particles in the water, ensuring that the filtered water meets high standards. The fixed connection between the upper connector and the filter box enhances the overall structural stability of the filter element, enabling it to withstand higher working pressures and fluid impacts. The fixed connection between the fine filtrate outlet pipe and the upper connector ensures smooth fluid flow out of the filter element, preventing leakage and contamination.

[0024] Furthermore, there are multiple second filter elements, and the second tank is provided with a second adapter pipe for connecting the fine filtered liquid outlet pipe to each of the upper connectors;

[0025] The second transfer pipe includes a second transfer main pipe for connecting to the fine filtration outlet pipe and a plurality of second transfer branch pipes for correspondingly connecting to each of the upper connectors. The ends of each second transfer branch pipe away from each of the upper connectors are connected to the second transfer main pipe, and the fine filtration outlet pipe is connected to the second transfer main pipe.

[0026] By adopting the above technical solution, the simultaneous use of multiple second filter cartridges increases the filtration area, allowing for the treatment of more water volume or higher concentrations of pollutants in a shorter time, while maintaining high standards of effluent quality and improving the system's filtration capacity and treatment efficiency. The integrated design of the second adapter connects the fine filtration outlet pipe to multiple second filter cartridges, simplifying the overall system structure.

[0027] Furthermore, it also includes an aeration assembly, which includes a first aeration pipe that passes through and is connected to the outer wall of the first tank, a second aeration pipe that passes through and is connected to the outer wall of the second tank, and an aeration main pipe for connecting the first aeration pipe and the second aeration pipe and for connecting an air pump. Both the first aeration pipe and the second aeration pipe are provided with a one-way valve.

[0028] By adopting the above technical solution, the bubbles generated by aeration rise in the water, driving the surrounding water flow and improving the hydrodynamic conditions within the tank. This helps reduce dead zones, increase fluid mixing, and ensures that the filter media fully contacts the water flow, thereby improving filtration efficiency. The one-way valve ensures that the gas flows only in one direction, from the air pump through the main aeration pipe into the first and second aeration pipes, and then into the tank. This prevents water or other fluids in the tank from flowing back into the air pump or other components through the aeration pipes, thus avoiding potential contamination and damage.

[0029] Furthermore, the first tank body is provided with a first liquid distribution pipe at the bottom, the first liquid distribution pipe is connected to the first aeration pipe, and the first liquid distribution pipe is spirally wound around the bottom of the first filter element.

[0030] The second tank is provided with a second liquid distribution pipe at the bottom, which is connected to the second aeration pipe. The second liquid distribution pipe is spirally wound around the bottom of the second filter element.

[0031] By adopting the above technical solution, the spirally arranged first and second liquid distribution pipes can ensure that the fluid is evenly distributed in the lower part of the filter element, avoiding local overload and fluid short-circuiting problems. At the same time, the gas introduced into the tank by the aeration pipe can form bubbles below the filter element through the liquid distribution pipe, allowing the fluid to come into more full contact with the filter element. When the bubbles burst on the surface of the filter element, it helps to remove the droplets that have agglomerated on the surface of the filter element.

[0032] Furthermore, a three-way sampling pipe is provided between the first tank and the second tank. The three-way sampling pipe has a first connecting pipe for communicating with the first tank, a second connecting pipe for communicating with the second tank, and a sampling branch pipe for connecting to the sampling container. One-way valves are provided on the first connecting pipe, the second connecting pipe, and the sampling branch pipe.

[0033] By adopting the above technical solution, the three-way sampling pipe allows operators to take samples from different tanks, which helps to better understand the fluid conditions inside the tanks and provides a basis for subsequent process adjustments and optimizations. One-way valves are installed on the first connecting pipe, the second connecting pipe, and the sampling branch pipe to prevent backflow of fluid during sampling, thereby ensuring the safety and accuracy of sampling, while also preventing external contaminants from entering the tanks and maintaining the cleanliness and stability of the system.

[0034] In summary, this application includes at least one of the following beneficial technical effects:

[0035] 1. Through a two-stage filtration mechanism of preliminary coalescence filtration and precision coalescence filtration, combined with filter elements of different precision and functional coatings (such as hydrophilic-oleophobic or oleophilic-hydrophobic coatings), efficient separation of crude oil and water is achieved, which can improve the separation efficiency more than a single filtration step.

[0036] 2. The parallel use of multiple first filter elements and multiple second filter elements increases the filtration area, improves the system's processing capacity and efficiency, and also helps to distribute the filtration load and extend the service life of individual filter elements. It ensures that crude oil is completely separated from water. One-way valves are installed on pipelines such as the inlet pipe, transfer pipe, fine filter outlet pipe, oil drain pipe and drain pipe to ensure that liquid and gas can only flow in the predetermined direction, avoid backflow and cross-contamination, and improve the reliability and safety of the system.

[0037] 3. The swirling effect inside the tank enhances the mixing and separation of liquids, improves filtration efficiency, helps remove droplets that coalesce on the filter element surface, and reduces clogging and deposition problems. The spiral arrangement and integrated design of the aeration pipe and liquid distribution pipe simplify the overall structure of the system, while ensuring uniform distribution of fluid in the lower part of the filter element and improving filtration effect. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the overall structure of a dual-super-swirl air flotation coalescing system according to an embodiment of this application. Figure 1 .

[0039] Figure 2 This is a schematic diagram of the overall structure of a dual-super-swirl air flotation coalescing system according to an embodiment of this application. Figure 2 (Hidden tank sidewall).

[0040] Figure 3 This is a schematic diagram of the overall structure of the first filter element, transfer tube, and coarse filtrate outlet tube in the embodiments of this application.

[0041] Figure 4 This is a schematic diagram of the overall structure of the first filter element in the embodiments of this application.

[0042] Figure 5 This is a cross-sectional view of the first filter element in the embodiment of this application.

[0043] Figure 6 This is a schematic diagram of the overall structure of the second filter element, the fine filtration outlet pipe, and the filter box support in the embodiments of this application.

[0044] Figure 7 This is a longitudinal sectional view of the filter box and the upper connector in an embodiment of this application.

[0045] Figure 8 This is a schematic diagram of the second filter element assembly installed in the second tank body in an embodiment of this application.

[0046] Explanation of reference numerals in the attached drawings: 1. Preliminary coalescing filtration device; 11. First tank; 111. Inlet pipe; 12. First filter element; 121. Upper connecting part; 122. Main frame; 123. Lower connecting part; 124. Filter membrane; 13. First transfer pipe; 131. First transfer main pipe; 132. First transfer branch pipe; 14. Transfer pipe; 15. Coarse filter outlet pipe; 16. First oil drain pipe; 17. First drain pipe; 2. Precision coalescing filtration device; 21. Second tank; 211. Fixing protrusion ring; 22. Second filter element; 221 1. Filter box; 222. Upper connector; 23. Second adapter pipe; 231. Second adapter main pipe; 232. Second adapter branch pipe; 24. Fine filter outlet pipe; 25. Fixing frame; 26. Second oil drain pipe; 27. Second drain pipe; 28. Discharge main pipe; 3. Aeration assembly; 31. First aeration pipe; 311. First liquid distribution pipe; 32. Second aeration pipe; 321. Second liquid distribution pipe; 33. Aeration main pipe; 4. Three-way sampling pipe; 41. First connecting pipe; 42. Second connecting pipe; 43. Sampling branch pipe; 5. One-way valve body. Detailed Implementation

[0047] To make the purpose, technical solution, and advantages of this application clearer, the following description is provided in conjunction with the appendix. Figure 1-8 The present application will be further described in detail with reference to the embodiments.

[0048] This application discloses a dual-super-swirl air flotation coalescing system. (Refer to...) Figure 1 and Figure 2 The dual-supercyclone air flotation coalescing system includes a preliminary coalescing filter 1 for coarse filtration of the raw liquid to be filtered and a precision coalescing filter 2 for fine filtration of the coarse liquid. The preliminary coalescing filter 1 and the precision coalescing filter 2 are connected by pipelines and the direction of the fluid is controlled by several one-way valves 5. Figure 3 The preliminary coalescence filtration device 1 includes a first tank 11 and a first filter element 12 disposed in the first tank 11. In order to improve the filtration efficiency, multiple first filter elements 12 can be arranged in parallel. In this embodiment, the number of first filter elements 12 is preferably six.

[0049] Reference Figure 4 and Figure 5The first filter element 12 has an upper connecting part 121, a main frame 122, and a lower connecting part 123 that are coaxially arranged and integrally connected from top to bottom. The outer wall of the main frame 122 is circumferentially surrounded by several parallel filter membranes 124. The filter membranes 124 are uniformly arranged in a pleated shape along the outer wall of the main frame 122. In this embodiment, the permeation diameter of the filter membranes 124 can reach 0.5 micrometers. The outer surface of the filter membranes 124 is coated with a functional coating. In this embodiment, the functional coating can be a hydrophilic-oleophobic coating or an oleophilic-hydrophobic coating. The lower connecting part 123 of each first filter element 12 is fixedly connected to the lower inner wall of the first tank 11. The hydrophilic-oleophobic coating can be a nano-modified high-hardness coating (model SJ-1109) from Zongyang Sanjin Pigment Co., Ltd., and the oleophilic-hydrophobic coating can be a superoleophilic and superhydrophobic coating authorized by Southeast University with announcement number CN109518462B.

[0050] Combination Figure 3 The first tank 11 is equipped with a first adapter pipe 13 for connecting each first filter element 12 in parallel and for connecting to other pipelines. The first adapter pipe 13 is located at the upper part of the first tank 11. The first adapter pipe 13 includes a first adapter main pipe 131 that is interconnected and integrally connected with each other, and six first adapter branch pipes 132. Each first adapter branch pipe 132 is correspondingly connected and fixedly connected to the upper connection part 121 of each first filter element 12. Figure 2 The first transfer main pipe 131 is connected to a transfer pipe 14 and a coarse filtrate outlet pipe 15.

[0051] Reference Figure 1 and Figure 2 The first tank 11 has an inlet pipe 111 tangentially along its side wall, which creates a swirling effect when the liquid enters the first tank 11. The end of the transfer pipe 14 away from its connection to the first transfer main pipe 131 passes through the side wall of the first tank 11 and is used to input the filtrate into the precision coalescing filter 2. The end of the coarse filtrate outlet pipe 15 away from its connection to the first transfer main pipe 131 passes through the side wall of the first tank 11 and is used to output the filtrate. The first tank 11 has a first oil drain pipe 16 at the center of its top and a first drain pipe 17 on its side wall. One-way valves 5 are installed on the inlet pipe 111, transfer pipe 14, coarse filtrate outlet pipe 15, first oil drain pipe 16, and first drain pipe 17 to prevent liquid backflow.

[0052] Reference Figure 2 and Figure 6The precision coalescing filtration device 2 includes a second tank 21 and a second filter element 22 disposed within the second tank 21. The end of the transfer pipe 14 away from the connection to the first transfer main pipe 131 passes through the second tank 21 tangentially, thereby creating a swirling effect when the liquid enters the second tank 21. To improve filtration efficiency, multiple second filter elements 22 can be arranged in parallel; in this embodiment, eight second filter elements 22 are preferably used.

[0053] Reference Figure 6 and Figure 7 The second filter element 22 includes a filter box 221 and an upper connector 222 fixedly connected to the upper side of the filter box 221. The second pipe body is provided with a second adapter pipe 23 for connecting the second filter elements 22 in parallel and for connecting to other pipes. The second adapter pipe 23 is located at the upper part of the second tank body 21 and includes a second main adapter pipe 231 that is interconnected and integrally connected to each other, and eight second branch adapter pipes 232. Each second branch adapter pipe 232 is correspondingly connected and fixedly connected to the upper connector 222 of each second filter element 22. A fine filtration outlet pipe 24 is connected to the second main adapter pipe 231. Figure 2 The end of the fine filtration outlet pipe 24 that is away from the second transfer main pipe 231 passes through the side wall of the second tank 21 and is used to output the filtrate.

[0054] In this embodiment, the filter cartridge 221 is preferably made of ceramic material, and its permeation diameter can reach 0.1 micrometers. The exterior of the filter cartridge 221 is coated with a functional coating; in this embodiment, the functional coating can be a hydrophilic-oleophobic coating or an oleophilic-hydrophobic coating. Figure 8 The second tank 21 is provided with a fixing frame 25 for inserting and fixing each second filter element 22, and the inner peripheral wall of the second tank 21 is provided with a fixing protrusion 211 for the fixing frame 25 to abut.

[0055] Reference Figure 1 and Figure 2 The second tank 21 has a second oil drain pipe 26 at the center of its top, and a second drain pipe 27 on its side wall. One-way valves 5 are installed on the coarse filter outlet pipe 15, the second oil drain pipe 26, and the second drain pipe 27 to prevent liquid backflow. A main discharge pipe 28 connecting the first oil drain pipe 16, the first drain pipe 17, the second oil drain pipe 26, and the second drain pipe 27 is located on one side of both the first tank 11 and the second tank 21.

[0056] An aeration assembly 3 is also provided between the first tank 11 and the second tank 21. The aeration assembly 3 includes a first aeration pipe 31 that passes through and connects to the outer wall of the first tank 11, a second aeration pipe 32 that passes through and connects to the outer wall of the second tank 21, and an aeration main pipe 33 for connecting the first aeration pipe 31 and the second aeration pipe 32. Both the first aeration pipe 31 and the second aeration pipe 32 are provided with one-way valves 5. The end of the aeration main pipe 33 away from the connection with the first aeration pipe 31 and the second aeration pipe 32 is used to connect to an air pump. A first liquid distribution pipe 311 is provided in the lower part of the first tank 11. The first liquid distribution pipe 311 is connected to the first aeration pipe 31 and is spirally wound around the lower part of the first filter element 12. The second tank 21 has a second liquid distribution pipe 321 at the bottom. The second liquid distribution pipe 321 is connected to the second aeration pipe 32. The second liquid distribution pipe 321 is spirally wound around the bottom of the second filter element 22.

[0057] A three-way sampling pipe 4 is also provided between the first tank 11 and the second tank 21. The three-way sampling pipe 4 has a first connecting pipe 41 for communicating with the first tank 11, a second connecting pipe 42 for communicating with the second tank 21, and a sampling branch pipe 43 for connecting the sampling container. A one-way valve body 5 is provided on the first connecting pipe 41, the second connecting pipe 42 and the sampling branch pipe 43.

[0058] The implementation principle of the dual-supercyclone air flotation coalescing system in this application embodiment is as follows: When the functional coatings of the first filter element 12 and the second filter element 22 are selected as hydrophilic and oleophobic coatings, the raw liquid to be filtered enters the first tank 11 through the inlet pipe 111, and the water flows into the interior of the first filter element 12 through percolation to complete coarse filtration. On the one hand, the coarse filtrate can enter the second tank 21 through the transfer pipe 14 for fine filtration; on the other hand, the coarse filtrate can also be discharged from the system through the coarse filtrate outlet pipe 15 as needed. The oil is retained inside the first tank 11 and floats at the top of the first tank 11. Under the action of liquid swirl, the oil is discharged through the first oil drain pipe 16 at the center of the upper part of the first tank 11. After the coarse filtrate enters the second tank 21, the water flows into the interior of the second filter element 22 through percolation to complete fine filtration and is discharged from the system through the fine filtrate outlet pipe 24. The oil is discharged through the second oil drain pipe 26 at the center of the upper part of the second tank 21.

[0059] When the functional coatings of the first filter element 12 and the second filter element 22 are selected as oleophilic and hydrophobic coatings, the raw liquid to be filtered enters the first tank 11 through the inlet pipe 111, and the oil enters the first filter element 12 through percolation to complete coarse filtration. The coarse filtrate is discharged from the system through the coarse filtrate outlet pipe 15 or enters the second tank 21 through the transfer pipe 14 for fine filtration. The remaining water is retained inside the first tank 11 and discharged through the first drain pipe 17. After the coarse filtrate enters the second tank 21, the oil enters the second filter element 22 through percolation to complete fine filtration and is discharged from the system through the fine filtrate outlet pipe 24. The remaining water is discharged through the second drain pipe 27.

[0060] Aeration component 3 introduces gas into the system, and the distribution pipe delivers the gas to the lower part of the filter element. Bubbles burst on the filter element surface, carrying away liquid droplets that have accumulated there, preventing clogging. Operators can use the three-way sampling pipe 4 to sample and test the liquid to be filtered in both tanks, thereby determining the fluid conditions within the tanks and providing a basis for subsequent process adjustments and optimizations.

[0061] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A dual-super-swirl air flotation coalescing system, characterized in that: It includes a preliminary coalescing filter device (1) and a precision coalescing filter device (2) that are interconnected; The preliminary coalescence filtration device (1) includes a first tank (11) and a first filter element (12) disposed inside the first tank (11). The outer surface of the first filter element (12) is coated with a functional coating. The first tank (11) has an inlet pipe (111) for inputting the raw liquid to be filtered through its outer wall. The inlet pipe (111) is arranged along the tangential direction of the first tank (11). The upper end of the first filter element (12) is connected to a transfer pipe (14). The precision coalescing filtration device (2) includes a second tank (21) and a second filter element (22) disposed in the second tank (21). The filtration accuracy of the second filter element (22) is greater than that of the first filter element (12). The surface of the second filter element (22) is coated with a functional coating. The end of the transfer tube (14) away from the first filter element (12) passes through the first tank (11) and enters the second tank (21). The end of the transfer tube (14) away from the first tank (11) is arranged along the tangential direction of the second tank (21). The second filter element (22) is connected to a fine filtrate outlet tube (24). The end of the fine filtrate outlet tube (24) away from the second filter element (22) passes through the second tank (21) for outputting the precision filtrate. One-way valves (5) are provided on the inlet pipe (111), the transfer pipe (14) and the fine filtration outlet pipe (24).

2. The dual-super-vortex air flotation coalescing system according to claim 1, characterized in that: The transfer pipe (14) located inside the first tank (11) is connected to a coarse filtrate outlet pipe (15). The end of the coarse filtrate outlet pipe (15) away from the transfer pipe (14) passes through the first tank (11) to output the preliminary filtrate. The coarse filtrate outlet pipe (15) is provided with a one-way valve body (5).

3. The dual-super-vortex air flotation coalescing system according to claim 1, characterized in that: The first tank (11) has a first oil drain pipe (16) at the center of the top, and a first drain pipe (17) on the side wall of the first tank (11). The second tank (21) has a second oil drain pipe (26) at the center of the top, and a second drain pipe (27) on the side wall of the second tank (21). A discharge main pipe (28) for connecting the first oil drain pipe (16), the first drain pipe (17), the second oil drain pipe (26), and the second drain pipe (27) is provided on one side of the first tank (11) and the second tank (21). A one-way valve body (5) is provided on the first oil drain pipe (16), the first drain pipe (17), the second oil drain pipe (26), and the second drain pipe (27).

4. The dual-super-vortex air flotation coalescing system according to claim 2, characterized in that: The first filter element (12) includes an upper connecting part (121), a main frame (122) and a lower connecting part (123) arranged coaxially. The upper connecting part (121) and the lower connecting part (123) are respectively fixedly connected to the upper and lower ends of the main frame (122). The outer wall of the main frame (122) is circumferentially provided with a plurality of filter membranes (124) arranged in parallel along the length direction. The functional coating is applied to the outside of each filter membrane (124). The upper connecting part (121) is used to connect the transfer pipe (14) and the coarse filtrate outlet pipe (15), and the lower connecting part (123) is fixedly connected to the lower inner wall of the first tank (11).

5. The dual-super-vortex air flotation coalescing system according to claim 4, characterized in that: The number of the first filter element (12) is multiple, and the first tank body (11) is provided with a first transfer pipe (13) for connecting the transfer pipe (14) and the coarse filter outlet pipe (15) to each of the upper connecting parts (121); The first adapter pipe (13) includes a first adapter main pipe (131) for connecting to the transfer pipe (14) and the coarse filtrate outlet pipe (15) and a plurality of first adapter branch pipes (132) for correspondingly connecting to each of the upper connecting parts (121). The ends of each first adapter branch pipe (132) away from each of the upper connecting parts (121) are connected to the first adapter main pipe (131). The transfer pipe (14) and the coarse filtrate outlet pipe (15) are both connected to the first adapter main pipe (131).

6. The dual-super-vortex air flotation coalescing system according to claim 1, characterized in that: The second filter element (22) includes a filter box (221) and an upper connector (222) fixedly connected to the upper end of the filter box (221). The functional coating is applied to the outside of the filter box (221), and the fine filtration outlet pipe (24) is fixedly connected to the upper connector (222).

7. The dual-super-vortex air flotation coalescing system according to claim 6, characterized in that: The number of the second filter element (22) is multiple, and the second tank body (21) is provided with a second adapter pipe (23) for connecting the fine filtration outlet pipe (24) to each of the upper connectors (222); The second transfer pipe (23) includes a second transfer main pipe for connecting to the fine filtration outlet pipe (24) and a plurality of second transfer branch pipes for correspondingly connecting to each of the upper connectors (222). The ends of each second transfer branch pipe away from each of the upper connectors (222) are connected to the second transfer main pipe, and the fine filtration outlet pipe (24) is connected to the second transfer main pipe.

8. The dual-super-vortex air flotation coalescing system according to claim 1, characterized in that: It also includes an aeration assembly (3), which includes a first aeration pipe (31) that passes through and is connected to the outer wall of the first tank (11), a second aeration pipe (32) that passes through and is connected to the outer wall of the second tank (21), and an aeration main pipe (33) for connecting the first aeration pipe (31) and the second aeration pipe (32) and for connecting an air pump. Both the first aeration pipe (31) and the second aeration pipe (32) are provided with a one-way valve body (5).

9. A dual-supercyclone air flotation coalescing system according to claim 8, characterized in that: The first tank (11) has a first liquid distribution pipe (311) at the bottom, which is connected to the first aeration pipe (31). The first liquid distribution pipe (311) is spirally wound around the bottom of the first filter element (12). The second tank (21) has a second liquid distribution pipe (321) at the bottom. The second liquid distribution pipe (321) is connected to the second aeration pipe (32). The second liquid distribution pipe (321) is spirally wound around the bottom of the second filter element (22).

10. A dual-supercyclone air flotation coalescing system according to claim 1, characterized in that: A three-way sampling pipe (4) is provided between the first tank (11) and the second tank (21). The three-way sampling pipe (4) has a first connecting pipe (41) for communicating with the first tank (11), a second connecting pipe (42) for communicating with the second tank (21), and a sampling branch pipe (43) for connecting the sampling container. A one-way valve body (5) is provided on the first connecting pipe (41), the second connecting pipe (42), and the sampling branch pipe (43).

Images