A filter element and filter with oil-water separation function

Abstract

The application relates to the technical field of filters, and discloses a filter element with an oil-water separation function and a filter, the filter element comprising end covers, an outer filter layer assembly and a separation layer assembly arranged between the end covers; the outer filter layer assembly comprises an outer filter layer and an inner framework; the separation layer assembly is arranged in the inner framework and comprises an inner filter layer; the inner filter layer is arranged in a circumferential direction on the side wall of the inner framework, and the inner filter layer comprises a super-hydrophobic material pipe; through the arrangement of the outer filter layer assembly and the separation layer assembly of the filter element, different sizes of contaminated particles in oil-water fluid can be intercepted in a layered manner through the filter layer assembly when the oil-water fluid flows through the outer filter layer assembly of the filter element; the super-hydrophobic boron nitride nanotube filter material effectively intercepts water in the oil-water fluid through the separation layer assembly, thereby playing a role in intercepting water in the oil-water fluid; the problems that the existing filter only has single fluid filtration, cannot realize layered filtration of particle impurities, is prone to filter element blockage, is difficult to replace the filter element, and is complicated to operate are solved.

Description

Technical Field

[0001] This invention belongs to the field of filter technology, specifically relating to a filter element and filter with oil-water separation function. Background Technology

[0002] Wastewater treatment refers to the process of purifying wastewater to meet the water quality requirements for discharge into a water body or for reuse. Major treatment technologies include activated carbon adsorption and ion exchange, membrane separation, advanced oxidation processes, wet oxidation, wet catalytic oxidation, supercritical water oxidation, photochemical catalytic oxidation, electrochemical oxidation, ozone oxidation, ultrasonic degradation, radiation, and immobilized biological technologies.

[0003] Filters, as an indispensable device in pipelines transporting media, are widely used in wastewater treatment processes and are typically installed on pressure reducing valves, pressure relief valves, or level control valves. As a filtration device, a filter mainly consists of a cylinder, filter element, and drain valve. In use, filter cartridges are primarily used to filter fluids used in any type of machinery, including substances such as air, oil, and water. Traditional filters mainly include water purification filters such as those disclosed in patent announcement number CN114873664B, which improve filtration efficiency by using multiple filter segments to form a flow path structure that connects the filter flow paths but closes the downstream filter segments. Other filters include those disclosed in patent announcement number CN113058324B, which use anti-detachment units and backflow balls to selectively open and close the lower orifice during filtration to prevent fluid backflow. Finally, there are multi-channel filters disclosed in patent announcement number CN105502743B, which use multi-channel valves to switch filtration paths internally, achieving convenient filter media cleaning, small size, and portability. While these filters have some filtration effect, it is clear that they still have the following drawbacks when used in wastewater treatment systems:

[0004] 1. The filter described above only has the effect of single-fluid filtration, that is, filtering out solids in water and adsorbing particulate impurities in the fluid, but it cannot perform oil-water separation in complex fluids during use, that is, filtering out oily impurities in sewage. Therefore, it is not suitable for use in sewage treatment systems that require oil-water separation.

[0005] 2. Although the filter element of the above filter can achieve the filtering effect when in use, the filter element structure is not designed so that the filter element cannot perform stratified filtration according to the particle size. As a result, the filter element has poor filtration effect when in use and is prone to clogging.

[0006] 3. As mentioned above, most filters adopt an integral structure without considering the convenience of disassembly and maintenance in the later stage. This makes it difficult and complicated to replace the filter element, and it is not convenient to quickly replace the filter element during use. Therefore, it cannot be promoted and used on a large scale in industry.

[0007] Therefore, the present invention designs a filter element and filter with oil-water separation function to solve the problems existing in the above-mentioned background art. Summary of the Invention

[0008] (a) Technical problems to be solved

[0009] To address the shortcomings of existing technologies, this invention provides a filter element and filter with oil-water separation function. This allows oil-water fluid to flow sequentially from the outside to the inside through the outer filter layer assembly and the separation layer assembly, exiting through the inner cavity of the filter element. When the oil-water fluid passes through the filter layer assembly, particulate impurities in the oil-water fluid are effectively intercepted. When it passes through the superhydrophobic boron nitride nanotube filter material on the separation layer, water in the oil-water fluid is effectively intercepted. This achieves both oil separation and oil concentration in the oil-water fluid, solving problems such as existing filters only performing single-fluid filtration, inability to achieve layered filtration of particulate impurities, easy clogging of the filter element, difficulty in replacing the filter element, and complex operation.

[0010] (II) Technical Solution

[0011] To achieve the above-mentioned objectives of effectively intercepting particulate impurities in oil-water fluids and realizing oil-water separation, the present invention provides the following technical solution:

[0012] This invention provides a first solution: a filter with oil-water separation function, including a filter element, and an upper shell and a lower shell that cooperate with each other; the upper shell has an interconnected oil-water fluid channel and an oil discharge channel; the lower shell is disposed below the upper shell and has a filtrate chamber formed therein, the filter element is disposed in the filtrate chamber, and the oil discharge port on the end cap of the filter element is connected to the conductive channel in the upper shell, the inlet end is connected to the filtrate chamber, and a water discharge channel is also provided on the upper side wall of the lower shell, which is connected to the filtrate chamber; after oil-water separation, the oil and water can be discharged separately and centrally, achieving the effect of diversion treatment, and facilitating the secondary use of oil and water after separate treatment through corresponding channels, thus realizing the sustainable use of resources.

[0013] Based on the above technical features, it can effectively remove particulate impurities from oil-water fluids and achieve oil-water separation, ensuring the separation effect of oil-water fluids in the sewage treatment system, guaranteeing the treatment effect of the sewage treatment system, and improving production efficiency.

[0014] As a preferred embodiment of the filter with oil-water separation function described in this invention, both the upper and lower housings are provided with control mechanisms for controlling the opening and closing of the oil discharge channel and the water discharge channel.

[0015] Based on the above technical features: the control mechanism can discharge the filtered water and oil in a controlled manner, ensuring the effect of oil-water separation, and realizing the automated control of the filtration process.

[0016] As a preferred embodiment of the filter with oil-water separation function described in this invention:

[0017] The control mechanism includes an inlet branch pipe, a seal, and an automatic valve. One end of the inlet branch pipe, located on the upper housing, communicates with the side wall of the oil discharge channel, and one end of the inlet branch pipe, located on the lower housing, penetrates the side wall of the lower housing and communicates with the filtration chamber. The seal is movably installed in the oil discharge channel and the water discharge channel, and is used to control the opening and closing of the oil discharge channel and the water discharge channel through the movement of the seal. The automatic valve is connected to both the inlet branch pipe and the seal.

[0018] Based on the above features: the opening and closing of the oil discharge channel and the water discharge channel are controlled by the movement of the sealing element. The separated oil or water is introduced into the automatic valve through the liquid inlet branch pipe. When the pressure of the oil or water is greater than the set threshold of the automatic valve, the automatic valve controls the sealing element to move upward, opening the oil discharge channel and the water discharge channel for drainage.

[0019] As a preferred embodiment of the filter with oil-water separation function described in this invention:

[0020] The automatic valve includes a reset element and a piston cylinder. The inlet of the piston cylinder is connected to the other end of the inlet branch pipe, which facilitates the introduction of oil or water into the piston cylinder through the inlet branch pipe. A piston is movably installed inside the piston cylinder. The lower end of the piston is connected to a sealing element, and the piston drives the sealing element to move. The reset element is fixedly installed in the inner cavity of the piston cylinder at the rear end of the piston and is used to reset the sealing element.

[0021] Based on the above characteristics: Under normal conditions, the reset member elongates, causing the lower end of the seal to engage in the lower end slots of the oil discharge channel and the water discharge channel, thus sealing the oil discharge channel and the water discharge channel. When the pressure in the oil discharge channel and the lower housing exceeds the threshold of the reset member, the reset member is compressed, and the oil discharge channel and the water discharge channel are opened, allowing the filtered water or oil to be discharged.

[0022] As a preferred embodiment of the filter with oil-water separation function described in this invention: a visual connector is also installed at the lower opening of the lower housing, and a drain valve is provided at the lower end of the visual connector.

[0023] Based on the above technical features: Since the density of water is greater than that of oil-water fluid, the filtered residue and wastewater containing residue are temporarily stored in the visible pipe after separation. When there is a lot of water in the visible pipe, the drain valve is opened to discharge it, so as to avoid the filter having too much filtered residue and wastewater containing residue, which would affect the separation effect of the filter element, and at the same time achieve diversion and sewage discharge.

[0024] As a preferred embodiment of the filter with oil-water separation function described in this invention: the filter further includes a differential pressure transmitter, which is disposed on the upper housing and / or the lower housing and communicates with the interior of the upper housing and / or the lower housing.

[0025] Based on the above technical features: when the filter element becomes clogged, an alarm signal is issued to facilitate timely replacement and cleaning of the filter element and ensure the safety of the filtration pipeline.

[0026] The present invention provides a second solution: a filter element having an oil-water separation function, comprising end caps, and further comprising an outer filter layer assembly and a separation layer assembly disposed between the end caps; the outer filter layer assembly comprises an outer filter layer and an inner skeleton, the outer filter layer being disposed outside the inner skeleton and arranged circumferentially along the inner skeleton, and surrounding the inner skeleton therein, the inner skeleton having an opening at at least one end, and having multiple channels communicating with the outside on the inner wall of the inner skeleton; the separation layer assembly being disposed inside the inner skeleton, comprising an inner filter layer, the inner filter layer being arranged circumferentially on the side wall of the inner skeleton, thereby forming a closed-loop structure, and the inner filter layer comprising a superhydrophobic material tube.

[0027] Based on the above technical features: by setting up the outer filter layer assembly and the separation layer assembly, when the oil-water fluid flows through the outer filter layer assembly, it can effectively intercept pollutant particles of different sizes in the oil-water fluid in layers, achieving deep dirt collection, improving filtration efficiency and avoiding filter clogging; when passing through the superhydrophobic boron nitride nanotube filter material on the separation layer assembly, it can effectively intercept water in the oil-water fluid, playing the role of oil-water separation.

[0028] As a preferred embodiment of the filter element described in this invention: the superhydrophobic material tube is a superhydrophobic boron nitride nanotube.

[0029] Based on the above technical features: superhydrophobic boron nitride nanotubes can effectively block water and automatically separate water in oil-water fluids, ensuring the oil-water separation effect in oil-water fluids.

[0030] As a preferred embodiment of the filter element of the present invention: the inner filter layer further includes a protective mesh, which has at least two layers to hold the superhydrophobic boron nitride nanotubes therein.

[0031] Based on the above technical features: by setting up a protective net to fix and protect the superhydrophobic boron nitride nanotubes, the impact resistance of the superhydrophobic boron nitride nanotubes is increased, which can effectively ensure the barrier efficiency of the superhydrophobic boron nitride nanotubes against water in oil-water fluids, and automatically separate the water in the oil-water fluids.

[0032] As a preferred embodiment of the filter element described in this invention, the protective mesh is a glass fiber mesh.

[0033] Based on the above technical features, the strength of the protective net can be effectively guaranteed to support and protect the superhydrophobic boron nitride nanotubes.

[0034] As a preferred embodiment of the filter element described in this invention: the outer filter layer is a corrugated tube structure, and the gaps provided on the corrugated tube structure are all variable diameter structures that gradually decrease along the filling direction.

[0035] Based on the above technical features: it can achieve layered interception of pollutant particles of different sizes in oil-water fluids, achieve deep fouling, ensure filtration effect and prevent filter element clogging, thereby greatly improving the service life of the filter element; and the outer filter layer has a fixed pore structure, so that the intercepted pollutant particles will not be discharged due to pressure difference and flow pulsation.

[0036] As a preferred embodiment of the filter element of the present invention: the separation layer assembly further includes a separation layer skeleton, which is disposed inside the inner filter layer, and a plurality of channels communicating with the outside are formed on the inner wall of the separation layer skeleton.

[0037] Based on the above technical features, it can effectively ensure the structural shape and strength of the filter element, while also supporting the middle inner filtration layer and ensuring structural safety.

[0038] As a preferred embodiment of the filter element of the present invention: the end cap has at least two, and one of the end caps has an oil outlet, which matches an opening formed on the inner frame.

[0039] Based on the above technical features: the outer filter layer assembly and the separation layer assembly are connected by the end cap to form a filter element structure that can achieve oil-water separation, and the end cap can enhance the pressure resistance of the filter element; the oil discharge channel is matched with the opening on the inner skeleton to guide the oil-water fluid in the filtration process to ensure filtration efficiency and effectively separate the oil-water fluid.

[0040] (III) Beneficial Effects

[0041] Compared with the prior art, the present invention provides a filter element and filter with oil-water separation function, which has the following beneficial effects:

[0042] 1. This invention designs a filter element. The filter element structure, through the arrangement of the outer filter layer assembly and the separation layer assembly, enables the oil-water fluid to be effectively intercepted by the filter layer assembly in layers at all times when it flows through the outer filter layer assembly, thereby achieving deep dirt collection, effectively improving the filtration effect, reducing the risk of filter element clogging, and ensuring the service life of the filter element.

[0043] 2. The superhydrophobic boron nitride nanotube filter material on the separation layer component can effectively intercept water in the oil-water fluid, which can both purify the oil and intercept water in the oil-water fluid, thus achieving the function of oil-water separation. This solves the problem that existing filters only have the effect of filtering a single oil-water fluid and do not have the function of oil-water separation, which leads to the inability to achieve oil-water separation in industrial wastewater treatment systems.

[0044] 3. This invention designs a filter that is installed on an oil-water fluid pipeline. It can effectively remove particulate impurities from the oil-water fluid and achieve oil-water separation, ensuring the filtration effect of the oil-water fluid in the sewage treatment system and improving the filtration efficiency of the sewage treatment system.

[0045] 4. Through the design of the control mechanism, this invention can achieve automatic drainage of filtered oil and water without the need for manual operation, making it simple and convenient to use;

[0046] 5. By setting up a visual connector, a water discharge channel, and an oil discharge channel, this invention can separate and discharge filtered oil, water, and wastewater, effectively ensuring the effect and efficiency of wastewater filtration.

[0047] 6. The components of this filter are connected by threads at the inlet and outlet. This structural design is not only safe and reliable, but also facilitates disassembly and maintenance. The overall structure of this filter improves upon the problems of difficult filter element replacement and complex operation in traditional filters. It effectively intercepts particulate impurities in oil-water fluids and achieves oil-water separation. Attached Figure Description

[0048] Figure 1 This is a cross-sectional view of the filter of the present invention;

[0049] Figure 2 This is a cross-sectional view of the filter element of the present invention;

[0050] Figure 3 This is a partial enlarged view of part A of the filter element of the present invention;

[0051] Figure 4 This is a front view of the outer filter layer of the present invention;

[0052] Figure 5 This is a side view of the outer filter layer of the present invention;

[0053] Figure 6 This is a schematic diagram of the structure of the left end cap of the present invention;

[0054] Figure 7 This is a schematic diagram of the structure of the right end cap of the present invention;

[0055] Figure 8 This is a cross-sectional view of the filter housing of the present invention;

[0056] Figure 9 This is a cross-sectional view of the upper housing of the present invention;

[0057] Figure 10 This is a partial enlarged view of filter A in this invention.

[0058] In the diagram: 1. Filter element; 101. First rubber ring; 102. Left end cap; 103. Outer filter layer; 1031. Sealing slit; 104. Inner skeleton; 105. Inner filter layer; 106. Separation layer skeleton; 107. Separation layer end cap; 108. Right end cap; 109. Second rubber ring; 2. Lower shell; 21. Filtration chamber; 22. Water discharge channel; 3. Upper shell; 31. Oil discharge channel; 32. Oil-water fluid channel; 33. Conducting channel; 4. Control mechanism; 41. Inlet branch pipe; 42. Piston; 43. Seal; 44. Reset component; 45. Piston cylinder; 5. Retaining ring; 6. Shell rubber ring; 7. Visual transmitter; 8. ED ring plug; 9. ED ring; 10. Electrical transmitter; 11. Visual connector; 12. Drain valve. Detailed Implementation

[0059] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0060] Example 1: Please refer to Figures 1-7 The present invention provides a technical solution:

[0061] A filter element 1 with oil-water separation function includes an end cap, an outer filter layer assembly, and a separation layer assembly; wherein

[0062] The end cap has at least two, and one of the end caps is provided with an oil discharge channel;

[0063] The outer filter layer assembly is disposed between and connected to the end caps, and includes an outer filter layer 103 and an inner skeleton 104. The outer filter layer 103 is disposed outside the inner skeleton 104 and is used for layered filtration of pollutant particles of different sizes. The inner skeleton 104 is the inner skeleton of the outer filter layer 103 and is used to ensure the structural strength of the filter element 1. When the filter element 1 in the filter is working, it withstands the external hydraulic pressure. At the same time, in order to play a guiding role, at least one end of the inner cavity of the inner skeleton 104 is open, and multiple channels communicating with the outside are opened on the inner wall of the inner cavity of the inner skeleton 104. The open end of the inner skeleton 104 is connected to the oil discharge channel.

[0064] The separation layer assembly is disposed inside the inner frame 104 and includes an inner filter layer 105 and a separation layer frame 106 that provides support. The two ends of the inner filter layer 105 and the separation layer frame 106 are respectively connected to the end cap and disposed in the inner cavity of the inner frame 104, and are arranged circumferentially along the inner cavity wall of the inner frame 104 to form a closed-loop structure. The inner filter layer 105 is disposed between the inner frame 104 and the separation layer frame 106 and plays the role of oil-liquid separation.

[0065] As a preferred embodiment, in this embodiment, such as Figure 4 and Figure 5 As shown, the outer filter layer 103 is a corrugated tube structure made of glass fiber filter material, used for preliminary filtration. The gaps in the corrugated tube structure are all variable diameter structures that gradually decrease along the direction of the slit 1031 (the direction of oil-water fluid flow), so as to intercept pollutant particles of different sizes in layers, achieve deep dirt-holding, and thus greatly improve the service life. In addition, the outer filter layer 103 has a fixed gap structure, so that the intercepted pollutant particles will not be discharged due to pressure difference and flow pulsation. It has the characteristics of high precision, large dirt holding capacity, and fast filtration of solid pollutants.

[0066] Meanwhile, depending on the filtration requirements, the outer filter layer 103 can be made of glass fiber filter paper with different filtration efficiencies, and the depth of the slit 1031, the length of the corrugated pipe, the outer diameter, the inner diameter, etc. can all be made according to the filtration requirements.

[0067] As a preferred embodiment, in this embodiment, such as Figure 2 and Figure 3 As shown, to ensure strength, the inner skeleton 104 is made of 06Cr, which has good corrosion resistance, intergranular corrosion resistance, easy processing, and high toughness. 19 Ni 10 Made of rolled steel plate with a yield strength of 520 MPa, the filter element 1 installed in the filter is subjected to hydraulic pressure mainly by the inner skeleton 104 of the filter element 1 when it is working, which can support the entire filter element without deformation.

[0068] As a preferred embodiment, in this embodiment, such as Figure 2 and Figure 3 As shown, the inner filter layer 105 includes superhydrophobic boron nitride nanotubes and a stainless steel filter screen. The stainless steel filter screen is disposed on both the inner and outer sides of the superhydrophobic boron nitride nanotubes to form a protective mesh structure for the superhydrophobic boron nitride nanotubes, which can enhance the overall strength of the superhydrophobic boron nitride nanotubes. When the filter element 1 is in use, the superhydrophobic boron nitride nanotubes can effectively block water and automatically separate water from the oil-water fluid, effectively solving the problem that the filter element 1 in the prior art cannot effectively remove oil from the oil-water fluid.

[0069] The filtration grade of the superhydrophobic boron nitride nanotubes can be selected according to filtration requirements;

[0070] The stainless steel filter screen has at least two parts to hold the superhydrophobic boron nitride nanotubes within it, and the stainless steel filter screen is preferably made of glass fiber mesh, the filtration grade of which can be selected according to the filtration requirements; glass fiber is a high-performance inorganic non-metallic material with many varieties, and its advantages include good insulation, strong heat resistance, good corrosion resistance, and high mechanical strength. The inner and outer protective meshes can better support and protect the superhydrophobic boron nitride nanotube stainless steel filter screen;

[0071] The superhydrophobic boron nitride nanotubes and stainless steel filter screen are rolled on 06Cr 19 Ni 10 The upper and lower ends of the separation layer skeleton 106 are fixed to the left end cap 102 and the separation layer end cap 107 by polyurethane adhesive.

[0072] As a preferred embodiment, in this embodiment, such as Figure 2 and Figure 3 As shown, the separation layer skeleton 106 is made of 2mm thick 06Cr. 19 Ni 10 It is made of rolled steel plate and serves as a support. Multiple channels communicating with the outside are opened on the inner wall of the separation layer skeleton 106.

[0073] As a preferred embodiment, in this embodiment, such as Figure 2 , Figure 6 and Figure 7 To facilitate the fixing of the outer filter layer assembly and the separation layer assembly, and to ensure the pressure resistance of the filter element, the end caps include a left end cap 102 and a right end cap 108. The left end cap 102 and the right end cap 108 are respectively arranged parallel to each other on both sides of the outer filter layer assembly and the separation layer assembly, and both the left end cap 102 and the right end cap 108 extend into the inner cavity of the inner frame 104 and the separation layer frame 106; and a separation layer end cap 107 is also provided in the inner cavity of the inner frame 104 for fixing the end of the separation layer frame 106.

[0074] To ensure a good seal, the left end cap 102 and the right end cap 108 are installed at both ends of the outer filter layer assembly and the separation layer assembly respectively via the first rubber ring 101 and the second rubber ring 109. The left end cap 102, the inner skeleton 104 and the right end cap 108 are connected by polyurethane adhesive to form the main shape of the filter element 1. When the filter element 1 installed in the filter is working, the hydraulic pressure it receives is mainly borne by the inner skeleton 104 of the filter element 1. Therefore, the material selection of the inner skeleton 104 is very important.

[0075] The end caps 102, 107, and 108 are made of 2A12 aluminum rod. 2A12 aluminum is a high-strength hard aluminum that can be heat-treated for strengthening. It has excellent machinability in an aged state, is lightweight, highly corrosion-resistant, and easy to use.

[0076] The first rubber ring 101 and the second rubber ring 109 are made of 5171 rubber, which is a type of nitrile rubber, resistant to aviation oil and water fluids, and used as a sealing material.

[0077] The working principle of the filter element 1 described in this solution is as follows: When the oil-water fluid flows through this filter element 1, it undergoes preliminary filtration through the outer filter layer 103 in sequence to intercept pollutant particles of different sizes in the oil-water fluid in layers, thereby achieving deep dirt collection; after the preliminary filtration through the outer filter layer 103, the oil-water fluid enters the inner filter layer 105 through the inner skeleton 104. In the inner filter layer 105, superhydrophobic boron nitride nanotubes are used to block water, automatically separating the water in the oil-water fluid. The oil enters the center of the filter element, and finally, the completely filtered oil enters the inner cavity of the separation layer skeleton 106 through the channel on the separation layer skeleton 106 and is discharged.

[0078] Example 2: Please refer to Figure 1 , Figures 8-10 The present invention also provides a technical solution:

[0079] A filter with oil-water separation function is installed on an oil-water fluid pipeline, including the filter element 1 as described above, and also including an upper housing 3 and a lower housing 2 that cooperate with each other, wherein;

[0080] The upper housing 3 is disposed on the upper side of the lower housing 2, and an oil-water fluid channel 32 and an oil discharge channel 31 are provided on the upper housing 3. The oil-water fluid channel 32 and the oil discharge channel 31 are connected by a conductive channel 33.

[0081] A filtrate chamber 21 is formed inside the lower housing 2. The filter element 1 is disposed in the filtrate chamber 21, and the oil outlet of the end cap of the filter element 1 is connected to the guide channel 33. The liquid inlet of the end cap of the filter element 1 is connected to the filtrate chamber 21. At the same time, in order to discharge the filtered water, a water discharge channel 22 is also provided on the upper side wall of the lower housing 2 and is connected to the filtrate chamber 21.

[0082] In order to control the oil discharge channel 31 and the water discharge channel 22 and achieve the orderly discharge of filtered oil and water, control mechanisms 4 for controlling the opening and closing of the oil discharge channel 31 and the water discharge channel 22 are provided on both the upper shell 3 and the lower shell 2.

[0083] As a preferred embodiment, in this embodiment, such as Figure 1 and Figure 8 As shown, to ensure the connection effect, a retaining ring 5 and a housing rubber ring 6 are also provided between the upper housing 3 and the lower housing 2, and the upper housing 3 and the lower housing 2 are sealed and connected by the retaining ring 5 and the housing rubber ring 6.

[0084] In a preferred embodiment, the upper shell 3 and the lower shell 2 are made of 2Al2 hard aluminum alloy. 2Al2 hard aluminum alloy can be strengthened by heat treatment, and has better cutting performance, is lightweight, has strong corrosion resistance, and is easy to use.

[0085] As a preferred embodiment, in this embodiment, such as Figure 1 , Figure 8 and Figure 9 As shown, to ensure effective oil-water separation and sedimentation of the separated water by discharging the filtered oil and water during filtration, the control mechanism 4 is designed to include an inlet branch pipe 41, a seal 43, and an automatic valve.

[0086] One end of the liquid inlet branch pipe 41 provided on the upper housing 3 is connected to the side wall of the oil discharge channel 31, and one end of the liquid inlet branch pipe 41 provided on the lower housing 2 passes through the side wall of the lower housing 2 and is connected to the filter chamber 21.

[0087] The sealing element 43 is movably installed in the oil discharge channel 31 and the water discharge channel 22, and is used to control the opening and closing of the oil discharge channel 31 and the water discharge channel 22 through the movement of the sealing element 43;

[0088] The automatic valve is connected to both the inlet branch pipe 41 and the seal 43. The separated oil or water is introduced into the automatic valve through the inlet branch pipe 41. When the pressure of the oil or water is greater than the set threshold of the automatic valve, the automatic valve controls the seal 43 to move upward, opening the oil discharge channel 31 and the water discharge channel 22 to discharge the liquid.

[0089] As a preferred embodiment, in this embodiment, such as Figure 9 and Figure 10 As shown, the automatic valve includes a reset element 44 and a piston cylinder 45; wherein

[0090] The inlet of the piston cylinder 45 is connected to the other end of the inlet branch pipe 41, so that oil or water can be introduced into the piston cylinder 45 through the inlet branch pipe 41. A piston 42 is movably arranged inside the piston cylinder 45. The lower end of the piston 42 is connected to the seal 43, and the seal 43 is moved by the piston 42.

[0091] The reset member 44 is fixedly installed in the inner cavity of the piston cylinder 45 at the rear end of the piston 42, and is used to reset the seal 43; that is, under normal conditions, the reset member 44 is extended, so that the lower end of the seal 43 is inserted into the lower end slot of the oil discharge channel 31 and the water discharge channel 22, and the oil discharge channel 31 and the water discharge channel 22 are closed. When the pressure in the oil discharge channel 31 and the lower housing 2 is greater than the threshold of the reset member 44, the reset member 44 is compressed, the oil discharge channel 31 and the water discharge channel 22 are opened, and the filtered water or oil is discharged; through the above-mentioned control mechanism 4: (1) the separated oil or water is introduced into the automatic valve through the inlet branch pipe 41. When the pressure of the oil or water is greater than the set threshold of the automatic valve, the automatic valve controls the seal 43 to move upward, opening the oil discharge channel 31 and the water discharge channel 22 for drainage, effectively realizing the automatic drainage of the filtered oil and water without manual operation, which is simple and convenient to use; (2) in Under normal conditions, the reset member 44 extends, causing the lower end of the seal 43 to be inserted into the lower end slots of the oil discharge channel 31 and the water discharge channel 22, thus sealing the oil discharge channel 31 and the water discharge channel 22. When the pressure in the oil discharge channel 31 and the lower housing 2 exceeds the threshold of the reset member 44, the reset member 44 is compressed, and the oil discharge channel 31 and the water discharge channel 22 are opened, allowing the filtered water or oil to be discharged. The seal 43 can effectively control the opening and closing of the oil discharge channel 31 and the water discharge channel 22, ensuring the filtration effect of the filter when the pressure inside the filter does not reach the set pressure. (3) Through the above control mechanism 4, the discharge can be automatically controlled by setting the internal pressure threshold, protecting the filter structure and ensuring the filter's performance and service life. It can effectively remove particulate impurities in the oil-water fluid and achieve oil-water separation, ensuring the filtration effect of the oil-water fluid in the sewage treatment system and improving the filtration efficiency of the sewage treatment system.

[0092] In a preferred embodiment, for ease of use, the reset member 44 can be a spring or an electromagnetic control structure, the principle of which is the same as that of a solenoid valve.

[0093] As a preferred embodiment, in this embodiment, such as Figure 1and Figure 8 As shown, in order to monitor the oil pressure in the filter in real time, the filter also includes a differential pressure transmitter. The differential pressure transmitter is installed on the upper housing 3 and / or the lower housing 2 and is connected to the interior of the upper housing 3 and / or the lower housing 2. It is used to detect the oil pressure and water pressure in the filter and to send an alarm signal when the filter element 1 is blocked. The threshold differential pressure of the differential pressure transmitter can be adjusted and designed according to specific usage requirements.

[0094] The differential pressure transmitter is either a visual transmitter 7 or an electric transmitter 10; wherein, when the differential pressure is greater than 0.5 after the filter intercepts impurities and removes water, the visual transmitter 7 will change from blue to red to provide an alarm.

[0095] As a preferred embodiment, in this embodiment, such as Figure 1 and Figure 8 To prevent oil leakage, an ED ring plug 8 is provided at the lower opening of the lower housing 2. The ED ring plug 8 is installed at the lower end of the lower housing 2 through an ED ring 9. During use, the ED ring plug 8 acts as a seal to prevent oil leakage at the lower end of the lower housing 2.

[0096] As a preferred embodiment, in this embodiment, such as Figure 1 and Figure 8To centrally discharge the residue and wastewater containing residue after filtration by filter element 1, a visible pipe 11 is installed at the lower opening of the lower housing 2. A drain valve 12 is installed at the lower end of the visible pipe 11. During use, because water has a higher density than oil-water fluid, the filtered residue and wastewater containing residue are temporarily stored in the visible pipe 11. When a large amount of water is observed in the visible pipe 11, the drain valve 12 is opened to discharge it, thus preventing excessive filtered residue and wastewater containing residue from remaining in the filter. The wastewater containing sludge affects the filtration effect of filter element 1. This application, through the aforementioned three discharge branches, allows the oil-water mixture to enter the filtrate chamber 21 via the oil-water fluid channel 32 during use. The oil-water fluid entering the filtrate chamber 21 then passes sequentially through the outer filtration layer 103 (which layers and intercepts pollutant particles of different sizes, with a fixed pore structure (pore size and position) to prevent unloading) and the inner filtration layer 105 (which utilizes the superhydrophobic surface of superhydrophobic boron nitride nanotubes to filter water and dust). The filter is isolated and then filtered in stages to remove water from the oil-water mixture. The filtered oil is discharged through the oil discharge channel 31 via the guide channel 33. The filtered water is discharged through the water discharge channel 22 (the position of the discharge channel 22 is lower than the height of the filter element 1. The reason for setting it at this position is that the density of oil is less than that of water. Therefore, it can be ensured that the liquid level of the oil is higher than the position of the water discharge channel 22 during use, which can not only ensure the filtration effect of the oil, but also automatically discharge the water in the filter during use and protect the filter structure). The wastewater containing filter residue that settles at the bottom is discharged through the visible pipe 11 (the purpose of setting the visible pipe 11 is to allow the impurities filtered by the outer filter layer 103 to settle under the action of gravity. Using this pipe to discharge them can effectively reduce the number of times the filter needs to be cleaned and ensure the filtration efficiency and safety of the filter during use). In other words, the oil, the filtered clean water, and the wastewater containing filter residue are discharged from three separate channels, avoiding cross-contamination and improving the filtration effect of the wastewater.

[0097] As a preferred embodiment, in this embodiment, threaded connections are used between the components and at the inlet and outlet. This structural design is not only safe and reliable, but also facilitates disassembly and maintenance. The overall structure of this filter improves the problems of difficult filter element replacement and complicated operation in traditional filters.

[0098] When the filter described in this scheme is filtering, the oil-water fluid enters the filtrate chamber 21 through the oil-water fluid channel 32. The oil-water fluid entering the filtrate chamber 21 is then filtered in stages through the outer filter layer 103 and the inner filter layer 105 in the filter element 1 to remove the water in the oil-water fluid. Finally, the filtered oil is discharged through the conduction channel 33 into the oil discharge channel 31, and the filtered water is discharged through the water discharge channel 22.

[0099] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0100] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A filter with oil-water separation function, characterized in that: include Filter element (1), The upper shell (3) has an interconnected oil-water fluid channel (32) and an oil discharge channel (31); The lower shell (2) is located below the upper shell (3), and a filtrate is formed inside the lower shell (2). The filter element (1) is located in the filtrate chamber (21), and the oil outlet on the end cap of the filter element (1) is connected to the guide channel (33) in the upper shell (3). The liquid inlet end of the end cap of the filter element (1) is connected to the filtrate chamber (21). A water outlet channel (22) is also provided on the upper side wall of the lower shell (2) and is connected to the filtrate chamber (21). The oil outlet channel (31) is connected to the guide channel (33). A control mechanism (4) is provided on both the upper shell (3) and the lower shell (2). The control mechanism (4) includes an inlet branch pipe (41). One end of the inlet branch pipe (41) on the upper housing (3) is connected to the side wall of the oil discharge channel (31), and one end of the inlet branch pipe (41) on the lower housing (2) penetrates the side wall of the lower housing (2) and is connected to the filter chamber (21). The seal (43) is movably disposed within the oil discharge channel (31) and the water discharge channel (22); The automatic valve is connected to both the inlet branch pipe (41) and the seal (43); The automatic valve includes a piston cylinder (45), the inlet of the piston cylinder (45) is connected to the other end of the inlet branch pipe (41), and a piston (42) is movably arranged inside the piston cylinder (45), the lower end of the piston (42) is connected to the seal (43); and a reset member (44) is arranged in the inner cavity of the piston cylinder (45) at the rear end of the piston (42) and is connected to the piston (42). The separated oil or water is introduced into the automatic valve through the inlet branch pipe (41). When the pressure of the oil or water is greater than the set threshold of the automatic valve, the automatic valve controls the seal (43) to move upward, opening the oil discharge channel (31) and the water discharge channel (22) to drain the liquid. Under normal conditions, the reset piece (44) elongates, and the lower end of the seal (43) is inserted into the lower end slot of the oil discharge channel (31) and the water discharge channel (22) to seal the oil discharge channel (31) and the water discharge channel (22). When the pressure in the oil discharge channel (31) and the lower housing (2) is greater than the threshold of the reset piece (44), the reset piece (44) is compressed, and the oil discharge channel (31) and the water discharge channel (22) are opened to discharge the filtered water or oil. A visual connector (11) is also provided at the lower opening of the lower housing (2), and a drain valve (12) is provided at the lower end of the visual connector (11). The filter also includes a differential pressure transmitter, which is installed on the upper housing (3) and / or the lower housing (2) and communicates with the interior of the upper housing (3) and / or the lower housing (2). The differential pressure transmitter is a visual transmitter (7) or an electric transmitter (10). When the differential pressure is greater than 0.5 after the filter intercepts impurities and removes water, the visual transmitter (7) changes from blue to red to provide an alarm. The reset element (44) is a spring.

2. The filter with oil-water separation function as described in claim 1, characterized in that: The filter element (1) has an oil-water separation function, including end caps and a filter median between the end caps. The outer filter layer assembly includes an outer filter layer (103) and an inner frame (104). The outer filter layer (103) is disposed outside the inner frame (104) and is arranged circumferentially along the inner frame (104), and surrounds the inner frame (104). The inner frame (104) is open at least one end, and multiple channels communicating with the outside are provided on the inner wall of the inner frame (104). The separation layer assembly is disposed inside the inner frame (104) and includes an inner filter layer (105). The inner filter layer (105) is circumferentially disposed on the side wall of the inner frame (104) to form a closed loop structure, and the inner filter layer (105) includes a superhydrophobic material tube.

3. The filter with oil-water separation function as described in claim 2, characterized in that: The superhydrophobic material tube is a superhydrophobic boron nitride nanotube; The inner filter layer (105) also includes a protective mesh, which has at least two layers to hold superhydrophobic boron nitride nanotubes. The protective mesh is a glass fiber mesh.

4. The filter with oil-water separation function as described in claim 2, characterized in that: The outer filter layer (103) is a corrugated pipe structure, and the gaps in the corrugated pipe structure are all variable diameter structures that gradually decrease along the direction of the grouting gap (1031).

5. The filter with oil-water separation function as described in claim 2, characterized in that: The separation layer assembly also includes a separation layer skeleton (106), which is disposed inside the inner filter layer (105), and has multiple channels communicating with the outside on the inner wall of the separation layer skeleton (106).

6. The filter with oil-water separation function as described in claim 2, characterized in that: The end caps are at least two in number, and one of the end caps has an oil outlet that matches an opening in the inner frame (104).

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