A method and system for measuring and calibrating the concentration of oil mist nano-dispersions

Abstract

This invention discloses a method and system for measuring and calibrating the concentration of an oil mist nano-dispersion, belonging to the field of mechanical testing technology. The invention prepares a nanobubble solution using a porous membrane tube permeation method, employing a ceramic porous membrane tube in conjunction with a pressure tank to control the nanobubble particle size and concentration. A Malvern particle size analyzer is used to measure the solution concentration, which is then adjusted to the desired concentration through proportional dilution. The nanobubble solution is considered equivalent to an oil mist dispersion, and an optical measurement device is built based on the extinction method. A 900nm laser is used to irradiate the solution in a high-transmittance container, and the transmitted light attenuation intensity is measured using an optical power meter. The solvent used is carbon tetrachloride, chloroform, or dichloromethane, and the nanobubble gas is carbon dioxide, water vapor, or methane. The concentration is calculated based on Lambert-Beer's law. This method achieves stable control of oil mist concentration, avoids sampling errors, and improves the calibration accuracy and reliability of the oil mist detector.

Description

Technical Field

[0001] This invention belongs to the field of mechanical testing technology, and in particular relates to a method and system for measuring and calibrating the concentration of oil mist nano-dispersion systems. Background Technology

[0002] The use of lubricating oil is unavoidable in the operation of various mechanical equipment. However, large mechanical and power equipment, including large rotating machinery, high-power engines and gas turbines, and gearboxes, generate oil mist. Excessive oil mist can significantly impact the safety of mechanical equipment, further affecting personnel safety and equipment efficiency. Therefore, it is necessary to detect the concentration of oil mist generated during the use of mechanical equipment to ensure safety. This requires the addition of oil mist detectors to the equipment. Currently, domestically produced oil mist detectors generally suffer from insufficient accuracy and unreliable measurement results, necessitating improvements to oil mist concentration calibration methods to achieve a technological breakthrough. Existing methods for measuring oil mist concentration have significant drawbacks: Invention patent CN202310412368.8 employs an adsorption-separation indirect measurement method, which cannot accurately simulate the oil mist state of mechanical devices during actual use, and the physical measurement accuracy is difficult to guarantee; Utility model patent CN202221588292.1 uses an oil mist sample extracted from the entire machine for optical testing, but the extraction process introduces errors and lacks verification methods, resulting in insufficient data reliability; Invention patent CN201911275522.1 uses an atomizing device to generate and store oil mist, simulating the oil mist generation environment within mechanical devices, but it does not integrate a measurement device. All of the above methods require direct processing of the actual oil mist nano-dispersion system, but the concentration of the actually generated oil mist nano-dispersion system is uncontrollable, making it impossible to accurately simulate the true state of oil mist inside mechanical devices; oil mist easily diffuses and settles in the air, and the concentration continuously changes during the test, making it difficult to maintain uniformity and stability during calibration; direct sampling is complex and easily damages the original state of the oil mist dispersion system, causing accumulated measurement errors. These drawbacks severely restrict the calibration accuracy of oil mist detectors and affect the reliability of safety monitoring of mechanical devices. Therefore, it is necessary to develop a method for calibrating oil mist concentration that can accurately control the concentration and maintain the stability of the dispersion system, so as to overcome the technical obstacles caused by the uncontrollability of oil mist nano-dispersion systems. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention proposes a method and system for measuring and calibrating the concentration of oil mist nano-dispersions, thereby resolving the issues present in the prior art.

[0004] In a first aspect, to achieve the above objective, the present invention provides a method for measuring and calibrating the concentration of an oil mist nano-dispersion system, comprising the following steps:

[0005] Nanobubble solutions were prepared by porous membrane tube permeation method. A preparation device was formed by combining ceramic porous membrane tubes with a pressure tank to control the particle size and concentration of nanobubbles.

[0006] The concentration of the prepared nanobubble solution was measured using a Malvern particle size analyzer. The concentration of the nanobubble solution was changed by proportional dilution to obtain the desired concentration, and then verified again using a Malvern particle size analyzer.

[0007] An oil mist dispersion concentration measurement device was constructed, and the nanobubble solution was equivalent to an oil mist nanodispersion system. The mass extinction coefficient was calibrated based on the extinction method using the measured nanobubble concentration and the extinction degree obtained by optical measurement.

[0008] Optionally, the process for preparing the nanobubble solution includes:

[0009] After the gas in the cylinder is pressurized by a pressure regulator, it is introduced into the ceramic porous membrane tube through the inlet pipe and inlet valve; the high-pressure gas is forced into the solution in the pressure tank; the pressure in the pressure tank is kept in dynamic balance by adjusting the opening of the pressure relief valve to ensure that the preparation process is in a constant pressurized state; ceramic porous membrane tubes with different pore sizes are used in conjunction with pressure regulation to control the size and concentration of nanobubbles.

[0010] Optionally, the process of controlling the particle size and concentration of nanobubbles includes:

[0011] A ceramic porous membrane tube with a pore size of 100 nm or 200 nm was selected; the pressure inside the pressure tank was controlled within the range of 0.5-0.8 MPa; and a nanobubble solution with an average particle size of 100-200 nm was prepared.

[0012] Optionally, the concentration measurement and calibration process includes:

[0013] The nanobubble solution was placed in a high-transmittance container; near-infrared light with a wavelength of 900 nm was used as a laser source to irradiate the solution; the laser transmission attenuation intensity was measured by an optical power meter; the solvent was selected from carbon tetrachloride, chloroform or dichloromethane solution, and the nanobubble gas was selected from carbon dioxide, water vapor or methane.

[0014] Optionally, the optical concentration measurement process based on extinction method includes:

[0015] The mathematical relationship between light intensity attenuation and concentration was established based on Lambert-Beer's law; the concentration of the nanobubble solution was calculated by measuring the attenuation of transmitted light intensity.

[0016] Optionally, the method further includes:

[0017] The concentration of the nanobubble solution was periodically monitored using a Malvern particle size analyzer, and the solution concentration was adjusted to be close to that of the oil mist nanodispersion system.

[0018] Secondly, the present invention also provides an oil mist nano-dispersion concentration measurement and calibration system for implementing an oil mist nano-dispersion concentration measurement and calibration method, the system comprising:

[0019] The nanobubble solution preparation module is used to prepare nanobubble solutions through porous membrane tube permeation, and to control the particle size and concentration of nanobubbles.

[0020] The concentration control module is used to measure the concentration of the nanobubble solution using a Malvern particle size analyzer, and to change and verify the concentration through proportional dilution.

[0021] The optical calibration module is used to equate the nanobubble solution to an oil mist nanodispersion system, and to calibrate and verify the concentration of nanobubble solutions with known concentrations and particle sizes based on the extinction method.

[0022] Thirdly, the present invention also provides a computer terminal device, comprising:

[0023] One or more processors;

[0024] A memory, coupled to the processor, for storing one or more programs;

[0025] When the one or more programs are executed by the one or more processors, the one or more processors implement the steps of the oil mist nano-dispersion concentration measurement and calibration method in the first aspect described above.

[0026] Fourthly, the present invention also provides a computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, it implements the steps of the oil mist nano-dispersion concentration measurement and calibration method in the first aspect described above.

[0027] Fifthly, the present invention also provides a computer program product, including a computer program, characterized in that, when the computer program is executed by a processor, it implements the steps of the oil mist nano-dispersion concentration measurement and calibration method in the first aspect described above.

[0028] Compared with the prior art, the present invention has the following advantages and technical effects:

[0029] This invention provides a method and system for measuring and calibrating the concentration of an oil mist nano-dispersion. The invention achieves stable control of oil mist concentration by using a nanobubble solution as an equivalent substitute for the oil mist nano-dispersion. A porous membrane tube permeation method is employed to prepare the nanobubble solution, which is then used in conjunction with a Malvern particle size analyzer to adjust the concentration, ensuring the uniformity and stability of the dispersion. An optical calibration device based on the extinction method utilizes a combination of a high-absorbency gas and a low-absorbency solvent to directly measure the light intensity attenuation and calculate the concentration according to the Lambert-Beer law, eliminating indirect measurement errors. This method avoids concentration changes during oil mist sampling, simplifies the testing process, improves the calibration accuracy and reliability of the oil mist detector, and provides an effective equivalent means for measuring oil mist concentration in large-scale mechanical equipment. Attached Figure Description

[0030] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0031] Figure 1 This is a structural layout diagram of the nanobubble solution preparation device according to an embodiment of the present invention;

[0032] Figure 2 This is a layout diagram of an optical-based nanobubble solution equivalent testing device according to an embodiment of the present invention.

[0033] Figure 3 This is a flowchart illustrating the preparation and equivalent testing of nanobubble solution according to an embodiment of the present invention.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1. Gas cylinder; 2. Pressure regulator; 3. Inlet pipe; 4. Inlet valve; 5. Internal pressure gauge; 6. Outlet pipe; 7. Pressure relief valve; 8. Pressure tank; 9. Discharge pipe; 10. Ceramic porous membrane tube; 11. Ceramic porous membrane tube clamp; 12. Laser emitter; 13. Quartz beaker; 14. Nanobubble solution; 15. Near-infrared light; 16. Light intensity power meter; 17. Power meter; 18. Sliding common rail base. Detailed Implementation

[0036] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0037] It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although a logical order is shown in the flowchart, in some cases the steps shown or described may be executed in a different order than that shown here.

[0038] This invention utilizes an equivalent method to represent an oil mist nano-dispersion system using a nanobubble dispersion system, and employs an optical concentration testing method based on extinction to measure oil mist concentration and calibrate the oil mist detector. During the testing process, ceramic nanotubes of different pore sizes are used to control the nanobubble particle size. Nanobubbles with high absorption rates to a fixed wavelength laser and solutions with low absorption rates to a fixed wavelength laser are selected to prepare the nanobubble dispersion system. Optical concentration testing using the extinction method with the selected fixed wavelength laser is then performed to obtain the equivalent concentration of the oil mist nano-dispersion system. Based on this, the overall equivalent control of the oil mist nano-dispersion system can be achieved by controlling the concentration of the nanobubble solution and the nanobubble particle size, and this is verified using a Malvern particle size analyzer.

[0039] Example 1

[0040] This embodiment provides a method for measuring and calibrating the concentration of an oil mist nano-dispersion system, including:

[0041] Nanobubble solution 14 is prepared by porous membrane tube permeation method. A ceramic porous membrane tube 10 is combined with a pressure tank 8 to form a preparation device to control the particle size and concentration of nanobubbles.

[0042] The concentration of the prepared nanobubble solution was measured using a Malvern particle size analyzer. The concentration of the nanobubble solution was changed by proportional dilution to obtain the desired concentration, and then verified again using a Malvern particle size analyzer.

[0043] An oil mist dispersion concentration measurement device was constructed, and the nanobubble solution 14 was equivalent to an oil mist nano dispersion. The mass extinction coefficient was calibrated based on the extinction method using the measured nanobubble concentration and the extinction degree obtained by optical measurement.

[0044] As one embodiment of this example, the process of preparing the nanobubble solution 14 includes:

[0045] After the pressure of the gas in the cylinder is regulated by the pressure regulator 2, it is introduced into the ceramic porous membrane tube 10 through the inlet pipe and the inlet valve 4; the high-pressure gas is forced into the solution in the pressure tank 8; the pressure balance in the pressure tank 8 is maintained by adjusting the opening of the pressure relief valve 7 to ensure that the preparation process is under constant pressure; ceramic porous membrane tubes 10 with different pore sizes are used in conjunction with pressure regulation to control the particle size and concentration of nanobubbles.

[0046] As one embodiment of this example, the process of controlling the particle size and concentration of nanobubbles includes:

[0047] A ceramic porous membrane tube 10 with a pore size of 100 nm or 200 nm is selected; the pressure inside the pressure tank 8 is controlled within the range of 0.5-0.8 MPa; and a nanobubble solution 14 with an average particle size of 100-200 nm is prepared.

[0048] As one implementation method in this embodiment, the concentration measurement and calibration process includes:

[0049] The nanobubble solution 14 was placed in a high-transmittance container; near-infrared light 15 with a wavelength of 900 nm was used as a laser source to irradiate the solution; the laser transmission attenuation intensity was measured by an optical power meter; the solvent was selected from carbon tetrachloride, chloroform or dichloromethane solution, and the nanobubble gas was selected from carbon dioxide, water vapor or methane.

[0050] As one implementation method in this embodiment, the optical concentration measurement process based on the extinction method includes:

[0051] The mathematical relationship between light intensity attenuation and concentration was established based on Lambert-Beer's law; the concentration of the nanobubble solution was calculated by measuring the attenuation of transmitted light intensity.

[0052] As one implementation method in this embodiment, the method further includes:

[0053] The concentration of the nanobubble solution was periodically monitored using a Malvern particle size analyzer, and the solution concentration was adjusted to be close to that of the oil mist nanodispersion system.

[0054] This invention discloses an equivalent method for measuring and calibrating the concentration of oil mist nano-dispersion systems. The basic modules of this method include:

[0055] (1) Nanobubble Solution Preparation Module: A preparation device is formed by combining a ceramic porous membrane tube 10 with a pressure tank 8 using a porous membrane tube permeation method to prepare nanobubble solution 14. The device can generate a solution with corresponding nanobubbles, and its concentration is verified by a Malvern particle size analyzer. The pressure range of the pressure stabilizing tank used in the experimental preparation process is 0.5-0.8 MPa. The target pressure during the preparation process is adjustable (taking 0.8 MPa as an example). After the pressure stabilizing tank reaches the target pressure of 0.8 MPa and stabilizes, high-pressure air is introduced into the diesel fuel in the pressure tank 8 through the nanoporous membrane tube. Under normal pressure preparation, the pressure relief valve 7 is kept open to ensure that the pressure tank 8 is under normal pressure during the preparation process. Under pressurized preparation, the gas flow rate is adjusted by adjusting the opening of the pressure relief valve 7 to maintain the dynamic balance of the pressure inside the tank during the preparation process, ensuring that the pressure tank 8 is under constant pressure throughout the preparation process until the preparation is completed. To achieve a better equivalent state of the oil mist dispersion during the preparation process, nanobubbles with a particle size of approximately 100-200 nm are required. Therefore, two ceramic porous membrane tubes 10 with different pore sizes of 100 nm and 200 nm were selected, and different pressures were controlled within the pressure tank 8 to determine the concentration and particle size of the resulting nanobubble solution 14. The preparation process utilizes ceramic porous membrane tubes 10 with different pore sizes and different pressures within the pressure tank 8 to control the concentration and particle size of the resulting nanobubble solution 14.

[0056] (2) Nanobubble concentration control module: The concentration of the prepared nanobubble solution is measured using a Malvern particle size analyzer. The prepared nanobubble solution 14 is diluted proportionally with the original solution to change the concentration of the nanobubble solution 14, so as to obtain the nanobubble solution 14 with the required concentration. The concentration is then verified again using a Malvern particle size analyzer.

[0057] (3) Concentration Measurement and Calibration Module: A relevant device for measuring the concentration of oil mist dispersions was constructed. Using existing oil mist concentration measurement devices and methods, the concentration of nanobubble solution 14 with known concentration and particle size was measured and calibrated. An optical concentration measurement method based on extinction was used. Near-infrared light with a wavelength of about 900 nm was selected as the laser, CO2 with high absorption rate was used as the nanobubbles, and a liquid with low absorption rate was used as the solvent. This improved the effectiveness and measurement accuracy of the extinction method in this process.

[0058] The following is the test plan for testing lubricating oil mist in mechanical equipment:

[0059] 1. Using near-infrared light (around 900 nm) as the laser source, the absorption spectra of gases and solutions show that solutions such as carbon tetrachloride, chloroform, and dichloromethane have low absorption rates (transmittance ≥75%) in the near-infrared 15 band. Water vapor, CO2, and CH4, which have higher absorption rates in the near-infrared 15 band, are used as nanobubbles. In this experiment, carbon tetrachloride is used as the solution, and carbon dioxide is introduced into the solution to create nanobubbles.

[0060] 2. Using the nanobubble solution preparation module, a porous membrane tube permeation method is employed to pressurize gas from a ceramic porous membrane tube 10 into a solution within a pressure tank 8 to prepare a nanobubble solution 14. During the preparation process, the particle size and concentration of nanobubbles in the obtained nanobubble solution 14 are altered by changing the ceramic porous membrane tube 10 and varying the pressure of the pressurized gas.

[0061] 3. The particle size and concentration of the prepared nanobubble solution 14 were measured using a Malvern particle size analyzer. The changes in nanobubble concentration and particle size were observed periodically. A series of measures, such as dilution, were used to adjust the concentration of the nanobubble solution to make it close to that of the oil mist nano-dispersion system, thereby optimizing the equivalent effect.

[0062] 4. An optical-based equivalent testing device for nanobubble solutions was set up. A nanobubble solution 14 with known concentration and particle size was used as the test object, and its concentration was measured and calibrated as an equivalent oil mist nano-dispersion system. The nanobubble solution 14 with known concentration and particle size was placed in a high-transmittance container and irradiated with a near-infrared laser of wavelength 15. The degree of laser transmission attenuation was measured using an optical power meter at the other end. According to Lambert-Beer's theorem, light attenuates in particulate media, and the light intensity attenuation satisfies [the following condition].

[0063] I= (1)

[0064] In the formula: I0 and I are the light intensities before and after attenuation, respectively; The turbidity is caused by the absorption and scattering of light by the particle system; L is the optical path length.

[0065] For particulate media with a uniform single-size particle distribution, the turbidity calculation formula is as follows:

[0066] (2)

[0067] In the formula: denoted as the number concentration of the particulate medium; D is the particle size; m is the particle refractive index. The extinction coefficient of the particle is a function of the incident light wavelength λ, the particle size D, and the particle refractive index m, and can be calculated using Mie theory.

[0068] Clearly, formula (1) describes the quantitative relationship between the concentration and particle size of the particulate medium and the light intensity attenuation. Therefore, based on this mathematical relationship, the concentration and particle size parameters can be measured by determining the light intensity attenuation. In summary, the concentration of the nanobubble solution can be calculated by performing light intensity-concentration conversion using the extinction method and Lambert-Beer's law.

[0069] The concentration of the nanobubble solution was calculated by performing light intensity-concentration conversion using the extinction method and Lambert-Beer's law.

[0070] The proposed structure and layout of the nanobubble solution preparation device are shown in the attached figure. Figure 1 The setup of the optically based nanobubble solution equivalent testing device is shown in the attached figure. Figure 2 The flowchart for the preparation and equivalent testing of nanobubble solutions is attached. Figure 3 .

[0071] The implementation of this method will be described in detail below with reference to the accompanying drawings and examples:

[0072] (1). For example Figure 3 As shown, a flowchart of the preparation and equivalent testing of the nanobubble solution is presented. Using a porous membrane tube permeation method, gas is forced into the solution in a pressure tank. By changing the ceramic porous membrane tube and altering the pressure of the injected gas, the particle size and concentration of nanobubbles in the resulting nanobubble solution are varied. A Malvern particle size analyzer is used to measure the particle size and concentration of the obtained nanobubble solution. Regular monitoring is conducted to observe changes in nanobubble concentration and particle size. A series of measures, including dilution, are used to adjust the concentration of the nanobubble solution to approximate that of the oil mist nanodispersion system, thus optimizing the equivalent effect.

[0073] (2). An optical-based equivalent testing device for nanobubble solutions was set up. A nanobubble solution with known concentration and particle size was used as the test object, and its concentration was measured and calibrated as an equivalent oil mist nano-dispersion system. A nanobubble solution with known concentration and particle size was placed in a high-transmittance container and irradiated with a near-infrared laser. The laser transmission attenuation was measured by an optical power meter at the other end, and the light intensity-concentration conversion was performed by the extinction method and Lambert-Beer law to calculate the concentration of the nanobubble solution.

[0074] (3) Following the above procedure, the concentration of the oil mist nano-dispersion system can be equivalently measured and calibrated.

[0075] Based on this, the oil mist nano-dispersion concentration measurement and calibration method provided in this embodiment of the invention has the following beneficial effects:

[0076] (1) An equivalent method is adopted to use an easily controllable nanobubble solution to represent an oil mist nano-dispersion system that is difficult to control. Compared with the direct sampling of oil mist dispersion systems in oil mist detectors, engines and ships (application number CN202221588292.1), the sampling and testing process can be simplified, avoiding errors caused by changes in the oil mist dispersion system during direct sampling. By controlling the particle size and concentration of nanobubbles, equivalent measurements of oil mist nano-dispersion systems with different particle sizes and concentrations can be achieved. Compared with the simulated preparation of oil mist dispersion systems in an experimental platform (application number CN201911275522.1), the state of lubricating oil mist in various mechanical equipment can be better controlled and simulated, and the storage time is longer, the measurement process is simpler, and the measurement data is more reliable.

[0077] (2) Optical non-contact direct measurement is used. Compared with the indirect measurement by multiple adsorption in the invention patent with application number CN202310412368.8 entitled "An Oil Mist Concentration Measurement Device", the equivalent direct measurement is used. By using a solution with low light absorption and nanobubbles with high light absorption, the influence of optical measurement on the equivalent dispersion system can be minimized. Compared with common optical measurement and calibration methods, the measurement object is more reliable, convenient and easy to control.

[0078] (3) This invention mainly focuses on the equivalent study of the lubricating oil mist dispersion system generated during the use of mechanical equipment. This invention also has certain reference value for the design and measurement calibration of other oil mist dispersion test systems in the mechanical field.

[0079] Example 2

[0080] In this embodiment, a computer terminal device is provided, including:

[0081] One or more processors;

[0082] A memory, coupled to the processor, for storing one or more programs;

[0083] When the one or more programs are executed by the one or more processors, the one or more processors implement the steps of the above-described method for measuring and calibrating the concentration of oil mist nano-dispersions.

[0084] In this embodiment, a computer-readable storage medium is also provided, on which a computer program is stored. When the computer program is executed by a processor, it implements the steps of the above-described method for measuring and calibrating the concentration of oil mist nano-dispersions.

[0085] In this embodiment, an electronic device is also provided, including a memory and a processor. The memory stores a computer program, and the processor is configured to run the computer program to perform the steps of the above-described oil mist nano-dispersion concentration measurement and calibration method.

[0086] In this embodiment, a computer program product is also provided, including a computer program that, when executed by a processor, implements the steps of the above-described oil mist nano-dispersion concentration measurement and calibration method.

[0087] The aforementioned program can run on a processor or be stored in memory (or a computer-readable medium). Computer-readable media includes both permanent and non-permanent, removable and non-removable media, and information storage can be achieved by any method or technology. Information can be computer-readable instructions, data structures, program modules, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random-access memory (SRAM), dynamic random-access memory (DRAM), other types of random-access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transfer medium that can be used to store information accessible by a computing device.

[0088] These computer programs may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes can be implemented by different modules for different steps.

[0089] This embodiment provides such an apparatus or system. The system, referred to as an oil mist nano-dispersion concentration measurement and calibration system, includes:

[0090] The nanobubble solution 14 preparation module is used to prepare nanobubble solution 14 by porous membrane tube permeation method, and to control the particle size and concentration of nanobubbles;

[0091] The concentration control module is used to measure the concentration of the nanobubble solution 14 using a Malvern particle size analyzer, and to change and verify the concentration through proportional dilution.

[0092] An optical calibration module is used to equate the nanobubble solution 14 to an oil mist nano-dispersion system, and to calibrate and verify the concentration of the nanobubble solution 14 with known concentration and particle size based on the extinction method.

[0093] As one embodiment of this example, the nanobubble solution 14 preparation module includes:

[0094] Gas pressure regulating unit, connected to gas cylinder 1 and pressure regulator 2;

[0095] The membrane permeation unit, including the discharge pipe 9, the ceramic porous membrane tube and the clamp, pressurizes high-pressure gas into the solution in the pressure tank 8;

[0096] The pressure balancing unit dynamically maintains a constant pressure state inside the pressure tank 8 through the pressure relief valve 7.

[0097] The parameter control unit controls the characteristics of nanobubbles by replacing ceramic porous membrane tubes with different pore sizes and adjusting the pressure.

[0098] As one implementation method in this embodiment, the parameter control unit includes:

[0099] Ceramic porous membrane tubes with pore sizes of 100nm or 200nm;

[0100] A pressure control component that maintains the pressure inside pressure tank 8 at 0.5-0.8 MPa;

[0101] An interface for generating nanobubble solutions with a particle size of 100-200nm.

[0102] As one implementation method in this embodiment, the optical calibration module includes:

[0103] The sample container unit uses a high-transmittance quartz beaker 13 to hold the nano-bubble solution 14.

[0104] The laser emitting unit generates near-infrared laser light with a wavelength of 900nm.

[0105] The light intensity detection unit includes an optical power meter to measure the attenuation intensity of transmitted light.

[0106] The material assembly unit uses a carbon tetrachloride / chloroform / dichloromethane solution as the solvent and carbon dioxide / water vapor / methane as the nanobubble gas.

[0107] As one implementation method in this embodiment, the optical calibration module further includes:

[0108] The concentration calculation unit establishes a mathematical relationship between light intensity attenuation and concentration based on the Lambert-Beer law, and calculates the concentration and verifies the calibration effect by measuring the attenuation of transmitted light intensity.

[0109] As one embodiment of this invention, the concentration control module further includes:

[0110] The concentration optimization unit periodically monitors the concentration changes of the nanobubble solution 14 using a Malvern particle size analyzer, and adjusts the solution concentration to match the concentration of the oil mist dispersion system.

[0111] This system or apparatus is used to implement the functions of the methods in the above embodiments. Each module in the system or apparatus corresponds to each step in the method, as already described in the method, and will not be repeated here. Through the above embodiments, the problem of oil mist nano-dispersion concentration measurement and calibration in related technologies is solved, thereby ensuring that the problems existing in the prior art are resolved.

[0112] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A method for measuring and calibrating the concentration of an oil mist nano-dispersion system, characterized in that, Includes the following steps: Nanobubble solutions were prepared by porous membrane tube permeation method. A preparation device was formed by combining ceramic porous membrane tubes with a pressure tank to control the particle size and concentration of nanobubbles. The concentration of the prepared nanobubble solution was measured using a Malvern particle size analyzer. The concentration of the nanobubble solution was changed by proportional dilution to obtain the desired concentration, and then verified again using a Malvern particle size analyzer. An oil mist dispersion concentration measurement device was constructed, and the nanobubble solution was equivalent to an oil mist nanodispersion system. The mass extinction coefficient was calibrated based on the extinction method using the measured nanobubble concentration and the extinction degree obtained by optical measurement.

2. The method according to claim 1, characterized in that, The process for preparing the nanobubble solution includes: After the gas in the cylinder is pressurized by a pressure regulator, it is introduced into the ceramic porous membrane tube through the inlet pipe and inlet valve; the high-pressure gas is forced into the solution in the pressure tank; the pressure in the pressure tank is kept in dynamic balance by adjusting the opening of the pressure relief valve to ensure that the preparation process is in a constant pressurized state; ceramic porous membrane tubes with different pore sizes are used in conjunction with pressure regulation to control the size and concentration of nanobubbles.

3. The method according to claim 2, characterized in that, The process of controlling the particle size and concentration of nanobubbles includes: A ceramic porous membrane tube with a pore size of 100 nm or 200 nm was selected; the pressure inside the pressure tank was controlled within the range of 0.5-0.8 MPa; and a nanobubble solution with an average particle size of 100-200 nm was prepared.

4. The method according to claim 1, characterized in that, The concentration measurement and calibration process includes: The nanobubble solution was placed in a high-transmittance container; near-infrared light with a wavelength of 900 nm was used as a laser source to irradiate the solution; the laser transmission attenuation intensity was measured by an optical power meter; the solvent was selected from carbon tetrachloride, chloroform or dichloromethane solution, and the nanobubble gas was selected from carbon dioxide, water vapor or methane.

5. The method according to claim 1, characterized in that, The optical concentration measurement process based on extinction method includes: The mathematical relationship between light intensity attenuation and concentration was established based on Lambert-Beer's law; the concentration of the nanobubble solution was calculated by measuring the attenuation of transmitted light intensity.

6. The method according to claim 1, characterized in that, The method further includes: The concentration of the nanobubble solution was periodically monitored using a Malvern particle size analyzer, and the solution concentration was adjusted to be close to that of the oil mist nanodispersion system.

7. A concentration measurement and calibration system for oil mist nano-dispersion systems, characterized in that, The system includes: The nanobubble solution preparation module is used to prepare nanobubble solutions through porous membrane tube permeation, and to control the particle size and concentration of nanobubbles. The concentration control module is used to measure the concentration of the nanobubble solution using a Malvern particle size analyzer, and to change and verify the concentration through proportional dilution. The optical calibration module is used to equate the nanobubble solution to an oil mist nanodispersion system, and to calibrate and verify the concentration of nanobubble solutions with known concentrations and particle sizes based on the extinction method.

8. A computer terminal device, characterized in that, include: One or more processors; A memory, coupled to the processor, for storing one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors perform the steps of the method as described in any one of claims 1-6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method as described in any one of claims 1-6.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1-6.

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