An oil-water separation device based on surface-enhanced Raman spectroscopy.

Abstract

This invention discloses an oil-water separation device based on surface-enhanced Raman spectroscopy (SERS). It includes two sets of water pipes connected by filter plates, flanges, and fixing wires. Hydrophilic and hydrophobic copper meshes are arranged vertically between the two filter plates, both covered with a titanium dioxide mesh film. A gold nanoparticle film and an octadecylphosphonic acid hydrophobic modification layer are sequentially connected to the outer side of the hydrophobic copper mesh film. The hydrophobic copper mesh is inserted into a storage tank corresponding to the water pipe. The device integrates oil-water separation with SERS detection technology. It utilizes a double-layer copper mesh, hydrophobic modification, and gravity drive to achieve efficient separation; the gold nanoparticle film enhances the Raman signal for trace detection; and the titanium dioxide film provides photocatalytic self-cleaning, combined with the mechanical strength of the copper mesh, enabling material recycling. Compared to traditional technologies, this device offers advantages such as multifunctional integration, high efficiency and energy saving, sensitive detection, and environmental friendliness, providing a new solution for pollution treatment.

Description

Technical Field

[0001] This utility model relates to the field of oil-water separation technology, specifically to an oil-water separation device based on surface-enhanced Raman spectroscopy. Background Technology

[0002] In today's era of rapid industrialization, problems such as industrial wastewater discharge and leaks during offshore oil extraction and transportation occur frequently, resulting in large amounts of oil-water mixtures entering the natural environment and seriously threatening ecological balance and human health. Therefore, achieving efficient separation of oil-water mixtures and accurate detection of pollutants has become an urgent and critical task in the environmental and chemical fields. Traditional oil-water separation technologies rely on the density difference between oil and water, allowing them to separate into layers through settling. However, this method is extremely slow and struggles to separate highly emulsified oil-water mixtures, proving ineffective for separating small oil droplets. Centrifugation, while accelerating the separation process, is energy-intensive, resulting in high equipment and maintenance costs. Furthermore, its efficiency is significantly limited when handling complex oil-water mixtures. Adsorption separation methods can achieve some degree of separation, but the adsorbents are often difficult to regenerate, becoming new solid waste after use, increasing treatment costs and potentially causing secondary pollution. Crucially, these traditional technologies generally lack the ability to detect trace pollutants in the separated water in real time, failing to effectively ensure water quality safety. Surface-enhanced Raman spectroscopy (SERS), as a highly sensitive detection method, can rapidly analyze trace substances at the molecular level, showing great potential in the field of pollutant detection. However, current research largely confines SERS technology to laboratory testing, and the designed SERS substrates are difficult to integrate with actual oil-water separation processes. Furthermore, research on oil-water separation materials mainly focuses on improving the separation performance of the materials, rarely considering their synergistic effect with detection technologies. This disconnect between separation and detection technologies necessitates oil-water separation before transferring the separated water sample to the laboratory for testing. This process is not only cumbersome and time-consuming but also prone to introducing errors during sample transfer, failing to meet the needs of rapid on-site detection and real-time monitoring. In recent years, the rapid development of nanostructured materials has brought hope for solving the aforementioned problems. Metal nanoparticles, semiconductor materials such as titanium dioxide, and recyclable porous materials have demonstrated unique advantages in oil-water separation and detection. However, in practical applications, how to achieve uniform loading and stable modification of nanoparticles on the material surface through ingenious multi-level structural design, and further improve the cycling stability and detection sensitivity of the device in complex environments, remains a major challenge for researchers. This invention is based on this background and aims to develop an innovative device integrating high-efficiency oil-water separation, in-situ detection of trace pollutants, and material recycling. Utility Model Content

[0003] The purpose of this invention is to provide an oil-water separation device based on surface-enhanced Raman spectroscopy. This device can achieve efficient oil-water separation, in-situ detection of pollutants, and recycling of materials, thus solving the problems of single function and low efficiency in oil-water separation and pollutant detection in the prior art.

[0004] To achieve the above objectives, this utility model employs the following technical means: An oil-water separation device based on surface-enhanced Raman spectroscopy includes two sets of vertically distributed water pipes. Filter plates and flanges are connected to the inner and outer sides of the opposite ends of the two sets of water pipes, respectively. The flanges of the two sets of water pipes are connected by fixing wires. A hydrophilic copper mesh and a hydrophobic copper mesh are vertically distributed between the two sets of filter plates. A titanium dioxide mesh structure film is connected to the outer side of both the hydrophilic and hydrophobic copper meshes. A gold nanoparticle film is connected to the outer side of the titanium dioxide mesh structure film on the outer side of the hydrophobic copper mesh. An octadecylphosphonic acid hydrophobic modification layer is connected to the outer side of the gold nanoparticle film. A storage tank is inserted into the water pipe corresponding to the hydrophobic copper mesh.

[0005] Preferably, the water pipe, filter screen, and flange are all transparent acrylic products.

[0006] Preferably, a sealing ring is fitted onto the outer side of the connection between the two sets of flanges.

[0007] Preferably, a sealing positioning cover is inserted into the top of the storage tank, and the water pipe passes through the sealing positioning cover and is inserted into the storage tank.

[0008] Preferably, a protrusion is connected to one side of the sealing positioning cover.

[0009] Preferably, one side of the opening of the storage tank is connected to an outwardly protruding water outlet.

[0010] Preferably, the storage container is a transparent glass cup.

[0011] Preferably, the storage tank has a marking line attached to its side.

[0012] Preferably, the bottom of the storage tank is connected to an anti-slip mat.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. Multifunctional Integration: This invention breaks away from the traditional model where separation and detection technologies are independent, deeply integrating oil-water separation and surface-enhanced Raman spectroscopy detection technology into a single device. Traditional technologies require separate sample transfer for detection after separation, a cumbersome process prone to errors. This device, however, can directly detect trace pollutants in situ during the separation process, greatly improving the efficiency and convenience of environmental monitoring and providing a highly efficient solution for various pollution treatment scenarios. 2. High-efficiency oil-water separation performance: Double-layer copper mesh and hydrophobic modification: By combining hydrophilic and hydrophobic copper meshes with a titanium dioxide mesh film and an octadecylphosphonic acid hydrophobic modification layer, a superhydrophobic / oleophilic interface is formed. This interface utilizes the difference in interfacial wettability to achieve highly selective adsorption and rapid separation of the oil phase, accurately intercepting oil droplets of different sizes and effectively improving the separation effect; Gravity-driven optimization: Using a vertically assembled water pipe and a double-layer copper mesh structure, the continuous separation of oil-water mixtures is achieved by gravity drive. Compared with traditional high-energy-consuming methods such as centrifugal separation, this device does not require external power, which not only reduces energy consumption but also simplifies the separation process and has the advantage of high throughput. 3. High-sensitivity SERS detection capability: Gold nanoparticle films utilize their local surface plasmon resonance effect to significantly enhance the Raman signal, enabling trace-level detection of various organic pollutants. 4. Recyclability and Environmental Friendliness: Photocatalytic Self-Cleaning Function: The titanium dioxide mesh film generates strong oxidizing substances under light, which can effectively degrade organic pollutants adsorbed on the copper mesh surface, realize substrate regeneration, reduce the use of chemical cleaning agents, and reduce environmental pollution and maintenance costs; Material Durability: Based on the good mechanical strength of the copper mesh and the stability of the nanostructure, the device can still maintain high-efficiency separation and detection performance after multiple cycles of use, reducing the frequency of material replacement and reducing resource waste. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is an exploded view of the structure of this utility model; Figure 3 This is a cross-sectional view of the hydrophilic copper mesh of this utility model; Figure 4 This is a cross-sectional view of the hydrophobic copper mesh of this utility model; Figure 5 This is a bottom view of the anti-slip mat of this utility model; In the attached figures, the following labels are used: 1. Water pipe; 2. Filter plate; 3. Flange; 4. Fixing wire; 5. Hydrophilic copper mesh; 6. Hydrophobic copper mesh; 7. Titanium dioxide mesh structure film; 8. Gold nanoparticle film; 9. Octadecylphosphonic acid hydrophobic modification layer; 10. Sealing and positioning cover; 11. Protrusion; 12. Outer protrusion water outlet; 13. Storage tank; 14. Marking line; 15. Anti-slip pad; 16. Sealing ring. Detailed Implementation

[0016] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0017] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0018] Embodiment 1 of this utility model:

[0019] like Figure 1-4 As shown, an oil-water separation device based on surface-enhanced Raman spectroscopy includes two sets of vertically distributed water pipes 1. Filter plates 2 and flanges 3 are connected to the inner and outer sides of the opposite ends of the two sets of water pipes 1, respectively. The flanges 3 of the two sets of water pipes 1 are connected by fixing wires 4. Hydrophilic copper mesh 5 and hydrophobic copper mesh 6 are vertically distributed between the two sets of filter plates 2. Titanium dioxide mesh structure film 7 is connected to the outer side of both the hydrophilic copper mesh 5 and the hydrophobic copper mesh 6. Gold nanoparticle film 8 is connected to the outer side of the titanium dioxide mesh structure film 7 outside the hydrophobic copper mesh 6. Octadecylphosphonic acid hydrophobic modification layer 9 is connected to the outer side of the gold nanoparticle film 8. A storage tank 13 is inserted into the water pipe 1 corresponding to the hydrophobic copper mesh 6.

[0020] Working principle The working process of this device can be divided into three stages: initial separation, ultraviolet-triggered water release, and pollutant detection. Each stage relies on its unique structural design (water pipe 1, filter plate 2, flange 3, fixing wire 4, hydrophilic copper mesh 5, hydrophobic copper mesh 6, etc.) to achieve its function. Initial separation stage: The oil-water mixture enters the device through the upper water pipe 1. It first comes into contact with the hydrophilic copper mesh 5, where water molecules can quickly permeate due to its superhydrophilicity. The water that has permeated through the hydrophilic copper mesh 5 continues to flow downwards, reaching the hydrophobic copper mesh 6. Because the octadecylphosphonic acid hydrophobic modification layer 9 on the outside of the hydrophobic copper mesh 6 initially provides it with superhydrophobicity, water cannot pass through and is temporarily retained in the gap between the hydrophilic copper mesh 5 and the hydrophobic copper mesh 6. Simultaneously, the oil phase permeates through the hydrophilic copper mesh 5 and the hydrophobic copper mesh 6, flowing through the mesh to the storage tank 13. UV-triggered water release stage: When purified water needs to be discharged, ultraviolet light is used to irradiate the hydrophobic copper mesh 6. Under the action of ultraviolet light, the titanium dioxide mesh film 7 on the outside of the hydrophobic copper mesh 6 undergoes a photocatalytic reaction, decomposing the octadecylphosphonic acid hydrophobic modification layer 9, causing the surface of the hydrophobic copper mesh 6 to change from superhydrophobic to superhydrophilic. At this time, the water trapped between the two copper mesh layers quickly passes through the hydrophobic copper mesh 6 and flows into the storage tank 13 connected to it through the lower water pipe 1. Pollutant detection stage: A gold nanoparticle film 8 on the outer side of the hydrophobic copper mesh 6 is irradiated using a Raman spectrometer. The gold nanoparticle film 8 utilizes its surface-enhanced Raman effect (SERS) to detect trace pollutants adsorbed on the hydrophobic copper mesh 6 in the aqueous phase. The localized surface plasmon resonance effect generated by the gold nanoparticle film 8 can significantly enhance the Raman signal of pollutant molecules, thereby achieving accurate detection of trace pollutants and ensuring water quality safety.

[0021] Embodiment 2 of this utility model:

[0022] like Figure 1-4 As shown, an oil-water separation device based on surface-enhanced Raman spectroscopy includes two sets of vertically distributed water pipes 1. Filter plates 2 and flanges 3 are connected to the inner and outer sides of the opposite ends of the two sets of water pipes 1, respectively. The flanges 3 of the two sets of water pipes 1 are connected by fixing wires 4. Hydrophilic copper mesh 5 and hydrophobic copper mesh 6 are vertically distributed between the two sets of filter plates 2. Titanium dioxide mesh structure film 7 is connected to the outer side of both the hydrophilic copper mesh 5 and the hydrophobic copper mesh 6. Gold nanoparticle film 8 is connected to the outer side of the titanium dioxide mesh structure film 7 outside the hydrophobic copper mesh 6. Octadecylphosphonic acid hydrophobic modification layer 9 is connected to the outer side of the gold nanoparticle film 8. A storage tank 13 is inserted into the water pipe 1 corresponding to the hydrophobic copper mesh 6.

[0023] Water pipe 1, filter screen 2, and flange 3 are all made of transparent acrylic.

[0024] The advantages of the above settings are: Facilitates real-time observation: The transparent material allows operators to directly observe the oil-water separation process, water flow direction, and contaminant adsorption on the copper mesh surface inside the device. Without disassembling the device, abnormalities in separation can be detected in a timely manner, and operating parameters can be quickly adjusted or maintenance can be performed, improving the convenience of operation and the stability of device operation. Good chemical stability: Acrylic has good chemical resistance and strong resistance to corrosion of oil-water mixtures and chemical reagents that may come into contact with during the separation process. Compared with metal materials, it is not easy to rust or corrode, which can extend the service life of the device and reduce the replacement cost and maintenance frequency caused by component corrosion. Reduce device weight: Acrylic material has a lower density than metal, which can effectively reduce the overall weight of the device while ensuring structural strength, making the device easier to transport, install and move, especially suitable for scenarios that require frequent changes of work location. High cost-effectiveness: Acrylic products have relatively simple processing technology and low raw material costs. When mass-producing, they can effectively reduce the manufacturing cost of the equipment. At the same time, their good durability also reduces maintenance costs during long-term use, thus improving the cost-effectiveness of the equipment.

[0025] A sealing ring 16 is fitted on the outside of the connection between the two sets of flanges 3.

[0026] The advantages of the above settings are: Enhanced sealing performance: The sealing ring 16 can tightly fill the gap at the flange 3 connection, preventing the oil-water mixture from leaking under pressure, ensuring a stable separation environment inside the device, avoiding reduced separation efficiency or pollution of the external environment due to leakage, and ensuring the smooth progress of the oil-water separation process. Adaptable to different working conditions: The sealing ring 16 has good elasticity and flexibility, which can adapt to the slight deformation caused by temperature changes and pressure fluctuations during the operation of the device, and always maintain the sealing effect. It is suitable for complex and ever-changing working scenarios such as industrial wastewater treatment and marine oil spill emergency response. Reduced maintenance costs: Effective sealing can prevent oil-water mixtures from corroding the flange 3 connection parts, reduce the probability of damage to components due to corrosion and wear, extend the service life of flange 3 and related components, reduce the frequency of equipment maintenance and replacement, and thus reduce overall operation and maintenance costs. Ensuring detection accuracy: A well-sealed device can prevent external impurities from entering and avoid contaminating the separated water sample. At the same time, it ensures that the detection area of ​​the gold nanoparticle film 8 is not disturbed, thus guaranteeing the accuracy and reliability of the surface-enhanced Raman spectroscopy detection results.

[0027] A sealing and positioning cover 10 is inserted into the top of the storage tank 13, and a water pipe 1 passes through the sealing and positioning cover 10 and is inserted into the storage tank 13.

[0028] The advantages of the above settings are: Double sealing protection: The sealing positioning cover 10 and the top of the storage tank 13 form the first seal to prevent external dust, debris and volatile gases from entering; the water pipe 1 and the sealing positioning cover 10 pass through the joint to form the second seal through an interference fit or a secondary sealing structure to prevent the purified water after separation from being contaminated or leaked during storage, and to ensure that the water quality remains pure for a long time. Precise positioning of the water pipe: The structural design of the positioning cover 10 can mechanically limit the water pipe 1, ensuring that the water pipe 1 and the storage tank 13 are precisely aligned, avoiding poor water flow or sealing failure due to installation deviation, while simplifying the alignment process during device assembly and improving installation efficiency.

[0029] A protrusion 11 is connected to one side of the sealing positioning cover 10.

[0030] The advantages of the above settings are: Easy to open and close: The protrusion 11 acts as a force application point. By gripping or applying force to the protrusion 11, the user can more easily disassemble or install the sealing positioning cover 10, avoiding the difficulty of manual operation due to excessive sealing. It is especially suitable for scenarios that require frequent opening for sampling or maintenance, greatly improving the ease of operation. Precise positioning assistance: When installing the sealing positioning cover 10, the protrusion 11 can serve as a visual or tactile marker to help users quickly determine the correct alignment of the sealing positioning cover 10 with the storage tank 13 and the water pipe 1, preventing poor sealing or poor connection of the water pipe 1 due to misalignment, and ensuring the accuracy and sealing of the installation.

[0031] Enhanced structural stability: The protrusion 11 increases the local structural strength of the sealing positioning cover 10. During the transportation or use of the device, it can effectively disperse the impact of external forces on the sealing positioning cover 10, avoid deformation of the sealing positioning cover 10 due to external forces, and thus maintain the stability of the sealing environment inside the storage tank 13.

[0032] Embodiment 3 of this utility model:

[0033] like Figure 1-4 As shown, an oil-water separation device based on surface-enhanced Raman spectroscopy includes two sets of vertically distributed water pipes 1. Filter plates 2 and flanges 3 are connected to the inner and outer sides of the opposite ends of the two sets of water pipes 1, respectively. The flanges 3 of the two sets of water pipes 1 are connected by fixing wires 4. Hydrophilic copper mesh 5 and hydrophobic copper mesh 6 are vertically distributed between the two sets of filter plates 2. Titanium dioxide mesh structure film 7 is connected to the outer side of both the hydrophilic copper mesh 5 and the hydrophobic copper mesh 6. Gold nanoparticle film 8 is connected to the outer side of the titanium dioxide mesh structure film 7 outside the hydrophobic copper mesh 6. Octadecylphosphonic acid hydrophobic modification layer 9 is connected to the outer side of the gold nanoparticle film 8. A storage tank 13 is inserted into the water pipe 1 corresponding to the hydrophobic copper mesh 6.

[0034] A protruding water outlet 12 is connected to one side of the opening of the storage tank 13.

[0035] The advantages of the above settings are: Convenient drainage: The protruding water outlet 12 protrudes from the surface of the storage tank 13, which facilitates the rapid discharge of the separated oil phase and purified water after oil-water separation. It is suitable for various scenarios such as industrial water recycling and laboratory sampling, improving the flexibility of use.

[0036] Storage container 13 is a transparent glass product.

[0037] The advantages of the above settings are: Intuitive observation of water quality: The transparency allows operators to observe the clarity of the purified water, the presence of residual impurities or floating oil droplets in real time without opening the storage tank 13, and to judge the oil-water separation effect and water quality status in a timely manner, providing an intuitive basis for subsequent treatment or use and avoiding the risk of misjudgment due to opacity.

[0038] High chemical stability: Glass material has high resistance to chemicals such as acids, alkalis and organic solvents. It is not easy to react chemically with trace pollutants remaining in purified water, effectively preventing water quality from being contaminated or deteriorated during storage, ensuring the originality of water samples and the accuracy of test results. It is especially suitable for laboratory analysis or industrial monitoring scenarios with strict water quality requirements. High temperature resistance and anti-aging: Glassware has good thermal stability and can withstand high-temperature sterilization, effectively killing any bacteria that may grow. It is also not prone to aging, yellowing or becoming brittle with long-term use. Compared with plastic storage containers, it has a longer service life, reducing the frequency of equipment replacement and maintenance costs. Easy to clean and maintain: The smooth and flat glass surface does not easily absorb oil and impurities. Residual stains and water stains can be quickly removed by simple rinsing or using regular cleaning agents. The cleaning is easy and can keep the inside of the storage tank 13 clean, reducing the risk of secondary pollution caused by improper cleaning.

[0039] The side of the storage tank 13 is connected to a marking line 14.

[0040] The advantages of the above settings are: Precise capacity measurement: The marking line 14 clearly marks the capacity scale of the storage tank 13. Operators can quickly and intuitively determine the amount of purified water stored in the tank without the need for additional measuring tools. This makes it easier to keep track of the device's working progress and provides accurate capacity data for subsequent water quality testing, water allocation, and other operations. Standardized operating procedures: The safety water level line is marked by the marking line 14, which can clearly indicate the maximum water storage capacity of the storage tank 13, and avoid water overflow due to excessive water level, which may affect the normal operation of the device or cause environmental pollution. At the same time, it can also remind operators to drain the purified water in time, ensure the continuity of the oil-water separation process, and prevent the work from being interrupted due to the storage tank overflowing.

[0041] like Figure 5 As shown, the bottom of the storage tank 13 is connected to an anti-slip pad 15.

[0042] The advantages of the above settings are: Enhanced placement stability: The anti-slip mat 15 increases the friction between the storage tank 13 and the placement surface, effectively preventing the device from sliding or tipping over due to water flow impact, external force collision or slight vibration during operation. It is especially suitable for scenarios with high requirements for equipment stability, such as laboratory workbenches and industrial workshops, ensuring the safe and orderly operation of oil-water separation and storage processes. Protecting the storage container and the placement surface: The anti-slip pad 15 is made of soft material, which can cushion the pressure between the storage container 13 and the placement surface, prevent the bottom of the glass storage container 13 from being scratched or damaged due to friction or collision, and extend the service life of the storage container; at the same time, it can also prevent the placement surface from being scratched and protect the use environment.

[0043] Embodiment 4 of this utility model:

[0044] The wastewater generated by a certain machining enterprise contains a mixture of emulsified cutting fluid and water. In order to achieve wastewater purification and reuse while ensuring environmentally friendly discharge, the oil-water separation device based on surface-enhanced Raman spectroscopy technology of this utility model is used for treatment. The specific implementation process is as follows: I. Equipment Installation Two sets of water pipes 1 are placed vertically, one above the other. Filter plates 2 and flanges 3 are installed on the inner and outer sides of opposite ends of the water pipes 1, respectively. The two sets of flanges 3 are connected by fixing screws 4. A sealing ring 16 is fitted on the outer side of the connection to ensure that the device is sealed and leak-free. A hydrophilic copper mesh 5 and a hydrophobic copper mesh 6 are installed sequentially between two sets of filter plates 2, with the hydrophilic copper mesh 5 on top and the hydrophobic copper mesh 6 on the bottom. Both of them have a titanium dioxide mesh structure film 7 attached to their outer side. The titanium dioxide mesh structure film 7 on the outer side of the hydrophobic copper mesh 6 is sequentially connected to a gold nanoparticle film 8 and an octadecylphosphonic acid hydrophobic modification layer 9. Storage tank 13 is made of transparent glass. A protruding water outlet 12 is connected to one side of its opening, and a sealing and positioning cover 10 is inserted into the top. A water pipe 1 passes through the sealing and positioning cover 10 and is inserted into the storage tank 13. A protrusion 11 is connected to one side of the sealing and positioning cover 10 for easy operation. The side of the storage tank 13 is marked with an identification line 14, and the bottom is connected with an anti-slip pad 15. After the overall assembly of the device is completed, it is placed on the operating table in the wastewater treatment area of ​​the workshop. II. Operation Process Initial separation stage: Emulsified cutting fluid wastewater generated from machining is connected to the upper water pipe 1 through a pipeline. After the wastewater flows into the device, water molecules quickly penetrate due to the superhydrophilicity of the hydrophilic copper mesh 5. The permeated water continues to flow downward to the hydrophobic copper mesh 6. Due to the superhydrophobicity of the hydrophobic copper mesh 6 in its initial state, the water is temporarily retained between the hydrophilic copper mesh 5 and the hydrophobic copper mesh 6. The oil phase in the emulsified cutting fluid permeates from the hydrophilic copper mesh 5 and the hydrophobic copper mesh 6 and flows through the mesh. Ultraviolet-triggered water release stage: The operator turns on the ultraviolet lamp equipped with the device to irradiate the hydrophobic copper mesh 6. Under the action of ultraviolet light, the titanium dioxide mesh structure film 7 photocatalytically decomposes the octadecylphosphonic acid hydrophobic modification layer 9, making the surface of the hydrophobic copper mesh 6 superhydrophilic. The purified water that is retained between the two copper mesh layers quickly passes through the hydrophobic copper mesh 6 and flows into the storage tank 13 through the lower water pipe 1.

[0045] Pollutant detection stage: After the purified water in storage tank 13 is stored, the operator uses a Raman spectrometer to irradiate the gold nanoparticle film 8 on the hydrophobic copper mesh 6, and uses its surface-enhanced Raman effect (SERS) to detect the purified water phase adsorbed on the hydrophobic copper mesh 6 to determine whether the purified water meets the standards for reuse or discharge. III. Maintenance and Management Since the water pipe 1, filter screen 2, and flange 3 are all transparent acrylic products, the operator can observe the oil stains on the surface of the copper mesh inside the device at any time. When a lot of oil stains are found on the surface of the hydrophilic copper mesh 5 or the hydrophobic copper mesh 6, the copper mesh can be removed by disassembling flange 3 for cleaning or replacement. The storage tank 13 is a transparent glass cup, which makes it easy to observe the quality of the purified water inside. When the water quality is found to be substandard, the purified water can be discharged through the protruding water outlet 12 for secondary treatment. The design of the sealing positioning cover 10 and the protrusion 11 makes it convenient for operators to open the storage tank 13 for cleaning or sampling and testing. The anti-slip mat 15 ensures that the device is placed stably in a vibrating environment on the workshop floor, and avoids affecting the operation due to the device sliding or tipping over; the marking line 14 helps the operator to accurately grasp the water level in the storage tank 13 and reasonably arrange the discharge and treatment time of purified water. Through the operation of this device, the machining company has achieved efficient separation of oil and water in wastewater and accurate detection of pollutants. The treated purified water meets the reuse standards and can be reused in processes such as cooling workshop equipment. This not only reduces water waste but also lowers the company's wastewater treatment costs and environmental pollution risks.

[0046] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An oil-water separation device based on surface-enhanced Raman spectroscopy, characterized in that, It includes two sets of vertically distributed water pipes (1), with filter plates (2) and flanges (3) connected to the inner and outer sides of the opposite ends of the two sets of water pipes (1), respectively. The flanges (3) of the two sets of water pipes (1) are connected by fixing wires (4). A hydrophilic copper mesh (5) and a hydrophobic copper mesh (6) are connected between the two sets of filter plates (2). A titanium dioxide mesh structure film (7) is connected to the outer side of both the hydrophilic copper mesh (5) and the hydrophobic copper mesh (6). A gold nanoparticle film (8) is connected to the outer side of the titanium dioxide mesh structure film (7) on the outer side of the hydrophobic copper mesh (6). An octadecylphosphonic acid hydrophobic modification layer (9) is connected to the outer side of the gold nanoparticle film (8). A storage tank (13) is inserted into the water pipe (1) corresponding to the hydrophobic copper mesh (6).

2. The oil-water separation device based on surface-enhanced Raman technology according to claim 1, characterized in that, The water pipe (1), filter screen (2), and flange (3) are all transparent acrylic products.

3. The oil-water separation device based on surface-enhanced Raman technology according to claim 1, characterized in that, A sealing ring (16) is fitted on the outside of the connection between the two sets of flanges (3).

4. The oil-water separation device based on surface-enhanced Raman technology according to claim 1, characterized in that, A sealing positioning cover (10) is inserted into the top of the storage tank (13), and the water pipe (1) passes through the sealing positioning cover (10) and is inserted into the storage tank (13).

5. The oil-water separation device based on surface-enhanced Raman technology according to claim 4, characterized in that, A protrusion (11) is connected to one side of the sealing positioning cover (10).

6. The oil-water separation device based on surface-enhanced Raman technology according to claim 1, characterized in that, The storage tank (13) has an outwardly protruding water outlet (12) connected to one side of its opening.

7. The oil-water separation device based on surface-enhanced Raman technology according to claim 6, characterized in that, The storage container (13) is a transparent glass product.

8. The oil-water separation device based on surface-enhanced Raman technology according to claim 7, characterized in that, The storage tank (13) has a marking line (14) attached to its side.

9. The oil-water separation device based on surface-enhanced Raman technology according to claim 8, characterized in that, The bottom of the storage tank (13) is connected to an anti-slip pad (15).

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